ULTRASONIC TESTER OF LIQUID CONCENTRATION

This ultrasonic tester is suitable for the in-line concentration test of hydrogen peroxide solution dring its production with electrolysis method or the components analysis of other binary mixed liquid. A device to remove air bubbles and granular impurities mixed in the liquid to be tested is arranged in this instrument for the normal operation under the condition that clonic bubbles exist. More temp-sound-time curves for different concentrations are stored to realize autometic temp compensation in a wide range (concentration range: 0-38% and temp range: 25-50.5 deg.C). The technique of increasing its sending and receiving capabilities is applied to improve test accuracy.

Technique for producing selenious acid barium

The invention discloses a process of producing barium selenite, which comprises the following technical steps: (1) selenium dioxide of 0.2 kg to 0.3 kg is put into the water of 0.8 L to 1.5 L and mixed up until the selenium dioxide is fully soluble in water; (2) add barium hydroxide of 0.4 kg to 0.5 kg into the selenium dioxide water obtained in step (1), which is then mixed up for complete reaction; (3) dry, filter-press, rinse, dry and pulverize the sedimentation obtained in step (2) to get the product.

Tool for detecting fan shroud mounting bracket

The utility model discloses a tool for detecting a fan shroud mounting bracket. The device comprises a fixing frame, a base, pulleys, gears and racks, the device further comprises a first controller,a second controller, a third controller, a first digital motor and a second digital motor. The device also comprises a tool detector, a base is arranged at the top of the fixing frame; a first motor base is arranged on the left side in the top surface of the base; a first motor base is arranged on the base, a first digital motor is arranged on the first motor base, a pulley is arranged on the sideface of the first motor base, a second motor base is arranged behind the right side of the base, a second digital motor is arranged on the second motor base, a gear is arranged at the power output shaft end of the second digital motor, and a rack is arranged below the gear. The utility model has the characteristics of low production rejection rate, high working efficiency, strong adaptability andthe ...

Low concentration gas distributing device for

The utility model provides a low concentration gas distributing device for, includes gas air pipe, natural gas pipeline and gas mixture delivery line, the gas air pipe is connected to the coal mine gas air supply, natural gas tube coupling to natural gas air supply, set up the check valve on the gas air pipe, its characterized in that: set up the governing valve on the natural gas pipeline, this governing valve is connected with control system, set up methane concentration detection appearance on the gas mixture delivery line, this methane concentration detection appearance is connected with control system, the utility model has the advantages that stabilize the concentration of gas, and it is interval to make it be higher than the explosion, ensures the security of gas utilization.

Production process of zincium selenious acid

Image display method based on CT (Computed Tomography) plain scanning and data reconstruction

The invention discloses an image display method based on CT (Computed Tomography) plain scanning and data reconstruction, and relates to the field of image processing equipment. The method comprises the following steps: performing primary spiral CT scanning on the chest of a patient, and changing a scanning body position to obtain a plurality of CT sequence original images of a left coronary artery trunk and an anterior descending branch; the left coronary artery trunk and front descending branch CT sequence original image is converted into an image format according to the needed window width and window level, and a CT sequence image is obtained; acquiring three-dimensional data of the CT sequence picture, and performing data reconstruction on the three-dimensional data; and reconstructing a three-dimensional image through image processing equipment by using the three-dimensional data after data reconstruction, and displaying coronary artery blood vessels, intra-pulmonary blood vessels, ...

Anchor clamps are used in diaphragm coupling production

The utility model discloses an anchor clamps are used in diaphragm coupling production, the on -line screen storage device comprises a base, the top fixedly connected with operation panel of base, thetop of operation panel is seted up flutedly, the left side fixedly connected with dead lever at base top, the left side fixedly connected with nut of dead lever, the left side of nut are provided with the screw rod, and the right side swing joint that the right -hand member of screw rod runs through nut and dead lever in proper order and extends to the dead lever has first gripping sleeve, and inner cavity of the base's top is provided with the slide bar. The utility model discloses a setting of nut and screw rod can drive first gripping sleeve and remove, through spiral shell rasp bar and thread bush setting, can drive movable plate and sliding sleeve and remove, drives the second gripping sleeve through the carriage release lever simultaneously and removes and fix diaphragm coupling, has ...

Method for three-dimensional and artificial seedlings cultivation of perinereis aibuhitensis

The invention discloses a method for the three-dimensional and artificial seedlings cultivation of the perinereis aibuhitensis, which mainly comprises the steps of: (1) fishing and disinfecting the heteronereis; (2) laying eggs, hatching and cultivating the planktonic larva; (3) three-dimensionally cultivating the benthic larvae; and (4) seedling emerging. The key measures comprise the steps of: putting four setiger intermediate-later stage nectochaete into a polyethylene water tank for the three-dimensional cultivation, cultivating by flowing water, and properly mixing the single-cell algae, the EM (effective microorganisms) bacterium with various artificial baits. After the measures are used, the density of the larvae is reduced, the mutual massacre among the individuals is reduced, the nutritional requirement of each-stage larva and the good and stable water quality environment are guaranteed, the survival rate of the larva is greatly improved, the breeding rate from the fertilized ovum ...

Automatic bicycle turning reminder

An automatic bicycle turning reminder is characterized in that a handlebar rotating shaft fixed clip, an elastic contact sheet and a conduction copper sheet form a bicycle dynamic angle turning switch. The bicycle dynamic angle turning switch, a bicycle turning taillight, a pre-turning control button and a music chip form a bicycle turning automatic reminding device capable of giving acousto-optic prompts simultaneously. The automatic bicycle turning reminder can achieve turning prompt of bicycles automatically, and controls to communicate with the corresponding turning prompt light to work through rotating of the bicycle dynamic angle turning switch along with the handlebar. The automatic bicycle turning reminder can provide voice prompt while supplying red light warning through the turning light, so behind vehicles can be well reminded that front bicycles are turning to change the riding direction and will slow down and ride the bicycles slowly to increase the distance between the bicycle ...

Alternating current withstand voltage vehicle-mounted testing platform for 750kV ultrahigh voltage equipment

The invention provides an alternating current withstand voltage vehicle-mounted testing platform for 750kV ultrahigh voltage equipment. A whole set of 750kV series resonance testing devices (including a variable-frequency power source, an exciting transformer, an electric reactor, a voltage divider, a grading ring of the electric reactor and the voltage divider and the like), an auxiliary system and other equipment are integrated in the extreme limited space inside a vehicle through optimization design, the integrated design that the electric reactor and the voltage divider share one grading ring is adopted, an automatic unfolded testing platform and a lifting device are available, external hoisting equipment does not need to be relied on, wiring is convenient, and thus the operation that field alternating current withstand voltage tests for the 750kV ultrahigh voltage equipment can be completed efficiently and safely is achieved.

Gear box convenient to dismantle

The utility model discloses a gear box convenient to dismantle, comprising a box body and a box cover, the deep trouth has all been seted up to the both sides at box top, first through -hole has all been seted up to the both sides at case lid top, first through -hole and deep trouth intercommunication, first draw -in groove has all been seted up to the both sides of first through -hole inner chamber, and the inner chamber of first through -hole is provided with the fixed block, and the inside both sides of fixed block are all seted up flutedly, and the inner chamber of recess is provided withthe first fixture block that uses with the cooperation of first draw -in groove. The utility model discloses a cooperation of deep trouth, first through -hole, first draw -in groove, fixed block, recess, first fixture block, supporting shoe, connecting rod, backup pad, spiral shell rasp bar, driven conical tooth wheel, transfer line, initiative conical tooth wheel, hand wheel, stock, second through ...

Liquid-phase synthesis method of cadmium telluride

The invention relates to a liquid-phase synthesis method of cadmium telluride. The liquid-phase synthesis method comprises the following steps of: taking tellurium and cadmium, uniformly mixing according to a mol ratio of 1:1, putting the mixture into a silica tube, starting a vacuum machine, evacuating and sealing the silica tube, arranging the sealed silica tube in a muffle furnace to heat in a heating mode of stepped temperature rise, finishing the reaction under a melting condition, cooling, discharging when the temperature of a furnace cavity is cooled to an approximate room temperature to obtain a product, i.e. cadmium telluride, wherein the raw materials of 5N tellurium and 5N cadmium are adopted; raising the temperature at a temperature raising speed of 80-100 DEG C/h and stabilizing the temperature at 100-700 DEG C for 5-10 h; and stabilizing the temperature at 1190-1200 DEG C for 1-3 h. The synthesis method of the cadmium telluride, which is provided by the invention, is a safe ...

Preparation of potassium tellurite

The invention relates to a method for preparing a composition, in particular to a method for preparing potassium tellurite. The method for preparing potassium tellurite comprises the following steps that: (1) tellurium dioxide is added in water and evenly stirred to obtain the solution(I); (2) potassium hydroxide is gradually added and dissolved in the solution(I) to obtain the solution(II); (3)the solution(II) is subjected to evaporation, condensation and crystallization to obtain a potassium tellurite crystal; and (4) the potassium tellurite crystal is dried to obtain the potassium tellurite product. The method for preparing potassium tellurite is a preparation process which is safe, highly efficient and environment friendly. The preparation method of the invention takes tellurium dioxide, water and potassium hydroxide as materials, the product is potassium tellurite and water, and the target product can be obtained by removing water out of the product; moreover, the preparation method ...

Horizontal rolling mill convenient to remove

The utility model discloses a horizontal rolling mill convenient to remove, including the under casing, the first bearing of top fixedly connected with on under casing inner wall right side, the leftside fixedly connected with worm of first bearing, the left end of worm runs through the under casing and extends to the outside fixedly connected with carousel of under casing, the equal fixedly connected with second bearing in both sides at under casing inner wall top, the bottom fixedly connected with screw rod of second bearing, the top fixedly connected with gear on screw rod surface, gear and worm mesh. The utility model discloses a cooperation that sets up under casing, first bearing, worm, carousel, second bearing, screw rod, gear, spout, slide bar, baffle, screw hole, third bearing, support and gyro wheel is used, has reached the effect of the removal of being convenient for, has solved present rolling mill and has not been convenient for move, wastes time and energy when needs move ...

Method for preparing telluric acid

The invention provides a method for preparing telluric acid, which comprises the following steps: mixing tellurium powder and hydrogen peroxide in water to carry out redox reaction, thereby obtaining a telluric acid solution, wherein the purity of the tellurium powder is greater than 99.9%, and the particle size of the tellurium powder is smaller than 325 micrometers; and concentrating the telluric acid solution to crystallize, thereby obtaining the telluric acid. The raw material tellurium powder with the purity of greater than 99.9% and the particle size of smaller than 325 micrometers and hydrogen peroxide are subjected to redox reaction in water to obtain the telluric acid. By using the tellurium powder with the purity of greater than 99.9% and the particle size of smaller than 325 micrometers as the raw material without introducing new impurities, the prepared telluric acid has higher purity and higher product yield. The experimental result indicates that the telluric acid obtained ...

Pre-gluing method for pipeline joint

The invention discloses a pre-gluing method for a pipeline joint. The method comprises the following steps: after finishing processing the joint, clearing away sharp edges and burrs of the joint, examining whether the defects of scratches and collisions exist on a thread and a sealing surface of the joint; cleaning the surface of the joint if no defects of scratches and collisions exist on the thread and the sealing surface of the joint; drying the surface of the joint; pre-gluing glue on other threads except a first thread of the joint; solidifying the surface of the glue, solidifying and drying the outer layer of the glue, and enabling the inner layer of the glue to be in an emulsion state; transporting the joint coated with the glue to an assembly field and assembling, extruding the emulsion glue in the inner layer of the glue, and filling the extruded emulsion glue in a gap of the sealing surface to form an elastic sealing tape. The operation of applying the glue on the thread of the ...

Method for preparing sodium hydrogen selenite

The invention relates to a sodium hydrogen selenite preparation method which includes the steps that: (1) the selenium dioxide is dissolved in water to generate solution I; (2) the sodium hydroxide is added to the solution I; the PH is adjusted to equal to 2-9, so as to obtain the solution II; (3) the solution II is evaporated, condensed and crystallized to obtain crystal water sodium hydrogen selenite; (4) the crystal water sodium hydrogen selenite is dried to obtain the sodium hydrogen selenite product. The sodium hydrogen selenite preparation method is a safe, efficient and environmental protection preparation process; the preparation adopts the selenium dioxide, water and sodium hydrate as the source materials to generate the sodium hydrogen selenite and water; and then the water is removed to obtain the target product. The sodium hydrogen selenite preparation method has the advantages of generating no other hazardous substance in the production process, simple steps, convenient operation ...

Fluidized-bed boiler

The invention provides a fluidized-bed boiler, which comprises a fluidized-bed combustion chamber. The bottom of the fluidized-bed combustion chamber is provided with a wind chamber of a wind distributor, and the fluidized-bed combustion chamber is communicated with a blower; combusted flue gas of the combustion chamber is exhausted from a chimney through an induced draught fan; the outlet of the induced draught fan is connected with a flue gas recirculation tube which is respectively communicated with the fluidized-bed combustion chamber and the wind chamber; an upper layer wind adjusting valve is arranged between the flue gas recirculation tube and the fluidized-bed combustion chamber; an upper layer fan is arranged between the upper layer wind adjusting valve and the combustion chamber; an air draft pipe with an air regulating valve is arranged between the upper layer fan and the upper layer wind adjusting valve; upper layer wind is formed by the air and flue gas; the blower is connected ...

Horizontal mobile grate gasifier

The invention relates to a horizontal mobile grate gasifier, which comprises a furnace body with a grate and an air supply device. The air supply device consists of a primary air supply pipe and an upper-layer air supply pipe, the primary air supply pipe is connected with a plurality of air chambers and is arranged below the grate, the upper-layer air supply pipe is arranged on the two sidewalls of the furnace body and is communicated with the inner chamber of the furnace body, the rear part of the furnace body is provided with a flue gas channel, the rear end of the flue gas channel is connected with the combustor of a boiler, a flue gas circulating pipe which is connected with the rear part of the combustor communicates circulating flue gas and the upper-layer air supply pipe to form a mixed gas channel, the mixed gas channel and a steam pipe respectively extend into the air chamber and the cavity of the furnace body through a primary air Venturi pipe and a secondary air Venturi pipe; ...

Process and equipment for producing selenium dioxide

The invention discloses a technique and equipment for producing selenium dioxide, comprising the steps that: 1. selenium raw material is put into a selenium dioxide furnace; 2. the selenium dioxide furnace is covered and sealed; 3. industrial-grade nitric acid is added into a nitric acid tank; 4. an oxygen valve is opened, and oxygen passes through an air storage tank and the nitric acid tank, and the oxygen and aerosol nitric acid are transported into the selenium dioxide furnace; 5. the temperature of the selenium dioxide furnace is raised; 6. the selenium dioxide furnace is cooled; 7. the product is taken out and a furnace body is cleaned. The equipment of the invention sequentially consists of a buffer tank, the nitric acid tank, the selenium dioxide furnace, an S-shaped tube, a large product tank, a small product tank, a front tail-gas tank, and a post tail-gas tank. The technique of the invention provides a comprehensive gathering of the advantages of the existing production technique ...

Steerable clamping -force's supplementary anchor clamps

The utility model discloses a steerable clamping -force's supplementary anchor clamps, comprising a base plate, the top swing joint of bottom plate has first splint, the top of bottom plate and the right side swing joint who is located first splint have second splint, and the positive swing joint of first splint and second splint has a first spiral shell rasp bar, and the equal swing joint in theback of first splint and second splint has a second spiral shell rasp bar, the top of bottom plate and be located the right side fixedly connected with motor of second splint, and first spiral shell rasp bar's the surperficial right side swing joint who just is located the second splint has first drive belt, and the output of motor is connected through first drive belt and the transmission of first spiral shell rasp bar. The utility model discloses a present supplementary anchor clamps out -of -control clamping -force has been solved in motor, outage ware, a pressure sensor and the 2nd pressure ...

Method for producing sodium selenite

The invention discloses a method for producing sodium selenite, in particular a process for producing the sodium selenite through oxidation by taking elemental selenium as a raw material and introducing high-pressure oxygen into a sodium hydroxide water solution. The production process of the sodium selenite comprises the following steps of: firstly, grinding the elemental selenium into selenium power by a mill; secondly, preparing the sodium hydroxide water solution in an autoclave; thirdly, feeding selenium powder into the autoclave; fourthly, introducing high-pressure oxygen and oxidizing at constant temperature and constant pressure; fifthly, adding a proper amount of adsorbent; sixthly, press filtering, heating and evaporating filtrate, condensing and crystallizing; and seventhly, heating, drying and crystallizing, crushing and screening to obtain the sodium selenite. The method has the advantages of simple production process, less investment for equipment, simpleness and convenience ...

Method for preparing bismuth nitrate solution

The embodiment of the invention discloses a method for preparing bismuth nitrate solution. The method comprises the steps that A, bismuth and nitric acid are added to a reaction container connected with an oxygen source, the molar ratio of the bismuth and the nitric acid is 1: (3.1-4.0), and the concentration of the nitric acid is 20-68 %; B, oxygen is led into the closed reaction container, pressure in the reaction container is adjusted to be 0.1-0.9 Mpa, then stirring is carried out, the bismuth and the nitric acid react for 4-12 hours under the temperature of 30-90 DEG C, and the mixture is discharged after cooling. The bismuth and the nitric acid react under the conditions that oxygen is introduced and pressure is increased, the bismuth and the nitric acid are added according to a certain ratio, the bismuth and the nitric acid directly react to generate the bismuth nitrate solution, recycling of NOX is achieved, consumption of nitric acid is reduced, discharging of NOX is avoided, NOX ...

Production method of selenium sulfide

The invention relates to a production method of selenium sulfide. The method comprises the following steps: preparing 100-200g/L selenium dioxide solution through stirring, filtering, preparing 150-350g/L sodium sulfide solution, filtering, dropping sodium sulfide solution and glacial acetic acid at the same time in the selenium dioxide solution under stirring, stirring continuously to promote the reaction; placing the obtained solution in a centrifugal machine after the reaction for centrifugal separation, washing the obtained selenium sulfide product to be neutral; and drying to obtain the selenium sulfide product. The method in the invention has simple and practical technology, is easy to operate and can meet the requirements of environmental protection. In the operation, the dropping speed is required to be controlled when sodium sulfide and glacial acetic acid are dropped; hydrazine hydrate can be added in the residual solution with unreacted selenium dioxide after the centrifugal ...

Tip beveler for gear machining

The utility model discloses a tip beveler for gear machining, including the box, the bottom fixedly connected with fixed plate of box inner wall, the positive both sides swing joint of fixed plate have a fly leaf, and the through -hole has been seted up in the front of fly leaf, and the bottom of box inner wall and the back that is located the fixed plate are provided with first motor, the outputfixedly connected with screw rod of first motor, and threaded cover is cup jointed on the surface of screw rod, the equal fixedly connected with diaphragm in both sides of thread bush, the front of diaphragm and the one side of keeping away from the thread bush are through the inner wall swing joint of round pin axle with the through -hole. The utility model discloses a cooperation that sets up box, fixed plate, fly leaf, through -hole, first motor, screw rod, thread bush, diaphragm, slide bar, sliding ring, connecting rod, movable span and pinch -off blades is used, has reached the effect ofbeing ...

Technique for producing selenious acid barium

Aperiodic optical super crystal lattice design method for carrying out quasi-phase match and related non-linear optical process

The laser parts are designed by the invented method, such as the laser in full solid state and multiple wavelengths pumped by semiconductor laser. With non-periodic superlattice being designed by using the function and through the non-periodic structure as well as the second order nonlinear optical coefficient of the modulation material, the following processes can be realized. The matching processes of the single or multiple quasi-phases can be completed at same time. Or, the controllable mismatching processes of the single or multiple quasi-phase can be completed at same time. The process of switching the light frequencies and other relevant non-linear optical process can be realized.

Ultrasonic emulsion on-line concentration meter

The utility model relates to an ultrasonic emulsion on-line concentration meter, which comprises an ultrasonic probe 25, a temperature measuring circuit, an A/D converter, address, control and data buses 11, a CPU 9, an ROM 12 for storing the relationship of temperature, concentration and sound time of emulsion, an RAM, an I/O expander 17, a reset monostable device 23, a transmitting circuit 24, an amplifier 22, a zero crossing level detecting circuit 21, a time measuring door 20, a high speed timer 19, a crystal oscillator 14, an end monostable device 15, a breadth measuring door 16 and a breadth measuring frequency divider 13. The measuring concentration and the temperature sensitivity achieve 0.01% and 0.01 DEG C; the precision is superior to 0.1% and 0.1 DEG C. The ultrasonic emulsion on-line concentration meter can automatically eliminate sound time mutation or error data of over hours. The utility model has strong anti-interference capability, and quick and accurate in-line detection ...

Buccal type omnibearing electric toothbrush

A buccal type omnibearing electric toothbrush is characterized by being composed of a direct-current motor, a rechargeable battery, a radial strip-shaped hairbrush, a control circuit board and a pressure automatic starting switch; a power transmission component for making the strip-shaped hairbrush rotate is composed of a driving gear and a worm wheel; the pressure automatic starting switch is electrically connected with the control circuit board, and can be kept in a mouth and controls the toothbrush through a teeth biting pressure. The radial strip-shaped hairbrush and upper-row teeth and lower-row teeth of people form a three-face surrounded structure and rotate at the same time, and the direction of movement of the hairbrush is consistent with the detection of gaps between the teeth, so as to be more beneficial for cleaning food residual in the teeth gaps. The internally-arranged pressure automatic starting switch is not held by hands, is kept in the mouth and is controlled through ...

Period and field electrical funing method in quasi-phase matching optical parametric process and its application

A method for selectively applying electric field to super-lattice optical LN or LT material features that a periodical electric field is used during preparing specimen to modulate the refractivity of the specimen, realizing the electro-optical tuning of QPM optical parametric procedure and greatly increasing the tuning speed and precision of device. It can make the OSLLN or LT, or associated devices practical.

Preparation process of sodium selenate

The invention discloses a preparation technique of sodium selenate. The invention comprises the steps: 1. first proper selenium dioxide is dissolved into water to form selenious acid solution; 2. sodium hydroxide is added to adjust pH value to 7-14 to form sodium selenite; 3. hydrogen peroxide is added to fully oxidize the sodium selenite in the solution so as to form sodium selenate; 4. additive and adsorbent are added; 5. filtration, evaporation and crystallization are carried out; 6. finished products are made by heating and drying. The preparation technique of the invention is characterized by simple manufacturing technique, low investment of production equipment and easy and convenient operation and is a high efficiency and energy conservation preparation technique of sodium selenate.

Method for producing sodium selenite

The invention discloses a method for producing sodium selenite, in particular a process for producing the sodium selenite through oxidation by taking elemental selenium as a raw material and introducing high-pressure oxygen into a sodium hydroxide water solution. The production process of the sodium selenite comprises the following steps of: firstly, grinding the elemental selenium into selenium power by a mill; secondly, preparing the sodium hydroxide water solution in an autoclave; thirdly, feeding selenium powder into the autoclave; fourthly, introducing high-pressure oxygen and oxidizing at constant temperature and constant pressure; fifthly, adding a proper amount of adsorbent; sixthly, press filtering, heating and evaporating filtrate, condensing and crystallizing; and seventhly, heating, drying and crystallizing, crushing and screening to obtain the sodium selenite. The method has the advantages of simple production process, less investment for equipment, simpleness and convenience ...

Diaphragm coupling processes fixing device

The utility model discloses a diaphragm coupling processes fixing device, the on -line screen storage device comprises a base, the equal fixedly connected with nut in both sides at base top, the top of nut is provided with the bolt, one end that the bolt is close to the nut runs through nut and base in proper order and extends to the outside of base, the center fixedly connected with of the department operation panel at base top, the holding tank has been seted up at the top of operation panel, the inner chamber of holding tank is provided with first pinch -off blades, the equal fixedly connected with spring in both ends of first pinch -off blades. The utility model discloses a setting of nut and bolt is fixed the base, through fixed plate and sheathed tube setting, fixes diaphragm coupling, through the setting of first pinch -off blades and second pinch -off blades, fixes the one end that diaphragm coupling lies in the holding tank inside, has solved diaphragm coupling simultaneouslyand ...

Natural gas pressure energy comprehensive utilization complete equipment

Natural gas pressure energy comprehensive utilization complete equipment comprises a gas inlet, an output port, a first heat exchanger, a second heat exchanger, a first gas liquid separation tank, a second gas liquid separation tank, a third gas liquid separation tank and a fourth gas liquid separation tank; a first ejector is connected onto the passage between the second heat exchanger and the first gas liquid separation tank; a connection passage is formed between the third gas liquid separation tank and the second heat exchanger and is provided with a second ejector; one path of natural gas enters a screw expander and the other path of natural gas enters a boosting compressor of a natural gas liquefying device; the boosting compressor is connected with a circulation compressor in parallel; the natural gas from the boosting compressor and the natural gas from the circulation compressor converge and then enter a precooling heat exchanger; the screw expander is provided with a user interface ...

Gas injector for multi-cylinder gas engine

The invention discloses a gas injector for a multi-cylinder gas engine. The gas injector comprises a gas inlet common-rail pipe, gas inlet manifolds which are vertically arranged on the lower side of the gas inlet common-rail pipe, and injection metering valves connected with the gas inlet manifolds; one end of the gas inlet common-rail pipe is connected with a gas rail gas inlet connector in a sealed way; the other end of the gas inlet common-rail pipe is connected with a gas pressure and temperature sensor; the number of the gas inlet manifolds corresponds to that of cylinders of the engine; the injection metering valves are connected with an ECU (electronic control unit). According to the injector, the gas supply of each cylinder can be controlled accurately, the supply uniformity is high, and the dynamic property and the economy of the engine are improved by arranging the gas inlet manifolds which correspond to the cylinders respectively and are provided with the injection metering ...

Engine harness buckle ribbon

The utility model discloses an engine harness buckle ribbon. This engine harness buckle ribbon includes: buckle, its one end have the two -way guide way of inside extension for peg graft fixedly with the clamping support, the cross -section of this two -way guide way be " worker " font, and still have in the middle part of the inboard and the joint of clamping support adaptation is protruding, the ribbon guide way has been seted up to the side of facing of two -way guide way, and the ribbon, it is dividing the body structure with the buckle. This engine harness buckle ribbon makes the branch body structure with buckle and ribbon on the basis of present buckle ribbon, the buckle has two -way guide way for the clamping support can be followed two directions and inserted, does benefit to the fixed of pencil trunk, has improved the commonality of part greatly.

Method for preparing copper indium alloy

The invention relates to a method for preparing copper indium alloy, which comprises the steps of: crushing elemental copper and indium and dosing the elemental copper and indium in weight proportion, packaging proportioned mixture to a clean high purity graphite crucible, placing the graphite crucible in a quartz tube, introducing nitrogen to the quartz tube after charging, heating under protection of nitrogen for 0.5-4.5 hours at constant temperature of 650-1200 DEG C to form the alloy, then reducing the temperature, stopping introduction of nitrogen and discharging. The invention is a selection for preparing copper indium alloy and has the advantages of low equipment investment, simple process flow, low content of product impurities, good consistence of performance and high quality.

Multifunctional fuel distributor

The invention discloses a multifunctional fuel distributor. The multifunctional fuel distributor comprises a body and a mounting bracket, wherein fuel inlet and outlet oil ways are distributed in the body; a component mounting surface is arranged on one side of the body; the mounting bracket extends out from the lower end of the body; the multifunctional fuel distributor is directly fixed to an engine through the mounting bracket. According to the multifunctional fuel distributor, the basic function of distributing fuel is realized, meanwhile, mounting support is provided for a diesel oil filter or other components, and special components are reduced, so that the manufacturing cost, the procurement cost and the inventory management cost are reduced; the production beat and the like are increased; the arrangement is compact.

Process and equipment for producing selenium dioxide

The invention discloses a technique and equipment for producing selenium dioxide, comprising the steps that: 1. selenium raw material is put into a selenium dioxide furnace; 2. the selenium dioxide furnace is covered and sealed; 3. industrial-grade nitric acid is added into a nitric acid tank; 4. an oxygen valve is opened, and oxygen passes through an air storage tank and the nitric acid tank, and the oxygen and aerosol nitric acid are transported into the selenium dioxide furnace; 5. the temperature of the selenium dioxide furnace is raised; 6. the selenium dioxide furnace is cooled; 7. the product is taken out and a furnace body is cleaned. The equipment of the invention sequentially consists of a buffer tank, the nitric acid tank, the selenium dioxide furnace, an S-shaped tube, a largeproduct tank, a small product tank, a front tail-gas tank, and a post tail-gas tank. The technique of the invention provides a comprehensive gathering of the advantages of the existing production technique ...

Horizontal mobile grate gasifier

The invention relates to a horizontal mobile grate gasifier, which comprises a furnace body with a grate and an air supply device. The air supply device consists of a primary air supply pipe and an upper-layer air supply pipe, the primary air supply pipe is connected with a plurality of air chambers and is arranged below the grate, the upper-layer air supply pipe is arranged on the two sidewalls of the furnace body and is communicated with the inner chamber of the furnace body, the rear part of the furnace body is provided with a flue gas channel, the rear end of the flue gas channel is connected with the combustor of a boiler, a flue gas circulating pipe which is connected with the rear part of the combustor communicates circulating flue gas and the upper-layer air supply pipe to form a mixed gas channel, the mixed gas channel and a steam pipe respectively extend into the air chamber and the cavity of the furnace body through a primary air Venturi pipe and a secondary air Venturi pipe; ...

Intelligent building safety management system

The invention discloses a smart building safety management system, and relates to the technical field of smart buildings, the smart building safety management system comprises a terminal equipment platform, the terminal equipment platform comprises a monitoring module, the output end of the monitoring module is electrically connected with a screen recording module, the input end of the screen recording module is electrically connected with a smoke sensing module and a noise alarm module, and the smoke sensing module is electrically connected with the noise alarm module. The output end of the screen recording module is electrically connected with a display module, the output end of the display module is electrically connected with a database module, and the output end of the database module is electrically connected with a scheduling module. The intelligent building safety management system has the beneficial effects that the noise alarm module is arranged, so that loud-decibel sounds on ...

Gasification furnace with cone-shaped grates

The invention relates to a gasification furnace with cone-shaped grates, which comprises a furnace body with cone-shaped grates. The outside of the cone-shaped grates is provided with a first layer air chamber, a second layer air chamber and a third layer chamber, a furnace chamber at the upper part of the furnace body is a gasification layer, a flue and gas channel is arranged over the furnace chamber and is connected with a boiler burner, an upper layer air blower, a second air blower and a third air blower is respectively arranged in the first air chamber, the second air chamber and the third air chamber, a circulating flue and gas pipe is arranged at the rear part of the burner and is respectively communicated with the upper layer air blower, the second air blower and the third air blower, the mixed gas composed of air and circulating flue and gas is respectively conveyed to the first air chamber, the second air chamber and the third air chamber, the upper layer air blower is communicated ...

Application of lateral australis neuropeptide in prevention and treatment of periplaneta americana

The invention discloses an application of a lateral auditory neuropeptide in prevention and treatment of periplaneta americana. The AST comprises AST1 (SEQ ID NO.1) and AST2 (SEQ ID NO.2). According to the application disclosed by the invention, AST1 and AST2 are injected into a periplaneta americana female adult in a first reproductive cycle, so that synthesis of vitellogenin Vg can be inhibited, JH signals of fat bodies are inhibited by inhibiting synthesis of JH in eustachian bodies, then vitellogenesis of the fat bodies is inhibited, and finally ovarian maturation is inhibited; the aim of preventing and controlling periplaneta americana can be achieved by controlling the reproduction of female insects. The method is high in specificity, can directly target reproduction of female periplaneta americana, does not generate harmful substances polluting the environment, and provides a new method for pest prevention and control.

Auxiliary fixture

The utility model discloses an auxiliary fixture, including first barrel and second barrel, the right side of first barrel and the left side fixed connection of second barrel, the slot hole has been seted up around the first barrel surface, the left side threaded connection on first barrel surface has first thread bush, the surface of first barrel just is located the first sloping block of right side fixedly connected with of first thread bush, the 2nd cylinder cavity's top and bottom all are provided with splint, the right -hand member of splint extends to the outside of second barrel, threaded hole is all seted up with the bottom in the left top of second barrel. The utility model discloses a cooperation of first barrel, second barrel, slot hole, first thread bush, first sloping block, splint, screw hole, spiral shell rasp bar, second sloping block, second thread bush and handle is used, and work piece that can the different specifications of centre gripping has promoted clamping accuracy ...

Supersonic liquid concentration meter

Process for producing sodium selenite

The present invention relates to a production technology of sodium selenite. The invention comprises the following steps: 1. a proper amount of selenium dioxide is dissolved in water to form selenious acid solution; 2. sodium hydroxide is added to the selenious acid solution and the pH value is adjusted to 7 to 14; 3, a proper amount of additive and adsorbent is added; 4, filtration, evaporation and crystallization; 5, heating, drying, crushing and screening; 6, finished sodium selenite product. The sodium selenite production technology of the invention has the advantages of simple production technology, less production equipment investment, as well as simple and convenient operation, and is a highly efficient and energy-saving sodium selenite preparation technology.

Gasification furnace with cone-shaped grates

The invention relates to a gasification furnace with cone-shaped grates, which comprises a furnace body with cone-shaped grates. The outside of the cone-shaped grates is provided with a first layer air chamber, a second layer air chamber and a third layer chamber, a furnace chamber at the upper part of the furnace body is a gasification layer, a flue and gas channel is arranged over the furnace chamber and is connected with a boiler burner, an upper layer air blower, a second air blower and a third air blower is respectively arranged in the first air chamber, the second air chamber and the third air chamber, a circulating flue and gas pipe is arranged at the rear part of the burner and is respectively communicated with the upper layer air blower, the second air blower and the third air blower, the mixed gas composed of air and circulating flue and gas is respectively conveyed to the first air chamber, the second air chamber and the third air chamber, the upper layer air blower is communicated ...

Intelligent feeding control system for clam worm cultivation

The invention discloses an intelligent feeding control system for clam worm cultivation. The intelligent feeding control system for the clam worm cultivation comprises a water tank (1), a water pipe (2) connected with the water tank (1), a stirring box (3) connected with the water pipe (2), a material box (4) connected with the stirring box (3), a conveying pipe (5) connected with the stirring box (3) and a circulation pipeline (6) connected with the conveying pipe (5), wherein a water pump (7) and a proportional control valve (8) are mounted on the conveying pipe (5), a stirrer (9) is arranged in the stirring box (3), a material level detection sensor (10) and a vibration motor (11) are arranged in the material box (4), a spraying hole is formed in the circulation pipeline (6), and a spraying head (12) is mounted in the spraying hole. The intelligent feeding control system for the clam worm cultivation is reasonable in structural design and high in maneuverability, labor force of feeding ...

Novel sintering machine flexible transmission device with couple is balanced

Novel sintering machine flexible transmission device with couple is balanced, box have the box subdivision face of a slope, divide into left box and right box two parts to complete equipment, and alltransmission part and part are all installed on the case shell of left box and right box, and the gear wheel is by two sets of worm gearing drives that have motor, supplementary speed reducer separately, and the other end of supplementary speed reducer is provided with protection device, protection device is including setting up the speed reducer swing arm on flexible transmission device, the other end of speed reducer swing arm sets up tensile testing device, and the bottom of box is provided with the couple equalizer, and the couple equalizer includes the last base that is fixed in the lowerbase on the base member and is fixed in side box lower extreme, at the articulated dish spring cover of last base lower extreme. The utility model discloses whole design benefit, compact structure have ...

Preparation method of bismuth citrate

The embodiment of the invention discloses a preparation method of bismuth citrate. The method comprises the following steps: A, adding a bismuth nitrate solution into a citrate solution; B, reacting for 1 to 6 hours in a heat preservation manner at 60 DEG C to 80 DEG C; and C, washing and drying so as to prepare the bismuth citrate. The bismuth citrate is synthesized by one step by taking the bismuth nitrate solution and the citrate solution as raw materials, so that the process is simple and short in time; the reaction speed of the citrate solution is rapid, so that the yield of the bismuth citrate is high and the quality of the bismuth citrate is good; the consumption of the raw materials is decreased, so that the treatment cost of waste liquids is reduced; the reaction is thoroughly carried out, so that the obtained bismuth citrate is good; the difficult problem caused by the existing technology is avoided well.

Heat accumulation type burner used for industrial production

The invention discloses a heat accumulation type burner used for industrial production. The burner comprises an inverted-L-shaped outer shell, heat accumulation bodies, a gas burner and an air burner. The outer shell comprises a horizontal tube and a vertical tube located below the horizontal tube, one end of the horizontal tube is connected with one end of the vertical tube in a sealing mode, the gas burner is arranged at the other end of the horizontal tube, the air burner is arranged at the bottom end of the vertical tube, and the heat accumulation bodies are fixedly connected into an inner cavity of the horizontal tube. The heat accumulation efficiency of the heat accumulation type burner is high.

Method for preparing arsenic selenide granules

The invention relates to a method for preparing arsenic selenide granules. The method comprises the following steps of: crushing selenium and arsenic in a mol ratio of 3:2, proportioning, uniformly mixing and loading a mixture into a silica tube; evacuating and sealing the silica tube, arranging the sealed silica tube into a muffle furnace, synthesizing arsenic selenide in a stepped temperature-controlled heating mode, cooling to a room temperature after temperature stabilization is finished; then, arranging the obtained arsenic selenide in a quartz melt funnel to heat, enabling the arsenic selenide to be in a melting state and dipping the melted arsenic selenide into mixed liquid of water and glycerin for granulation; and washing the arsenic selenide with distilled water and drying to obtain an arsenic selenide product. The invention provides a selection for preparing arsenic selenide granules. The method for preparing arsenic selenide granules, which is provided by the invention, has ...

High-voltage series resonance device and voltage withstanding test method using same

The invention relates to a high-voltage series resonance device and a voltage withstanding test method using the device. The high-voltage series resonance device comprises a variable-frequency power source cabinet, a testing transformer, a resonance electric reactor and a testing voltage measuring device with a current sensor, wherein the current sensor is connected in series between the high-voltage end tail and the grounded end of a capacitive sample; the resonance electric reactor is installed with a fixed section number at a fixed position, so that the inductance value of the resonance electric reactor remains unchanged. The frequency of voltage signals output by the variable-frequency power source cabinet is adjusted through the device, so that when a series resonance circuit is in a complete resonance state, the voltage value of the resonance electric reactor is equal to that of the two ends of the sample to be tested, and sample test voltage to be detected is determined through Fourier ...

Fuel filter of engine

The utility model discloses a fuel filter of engine is equipped with a plurality of oil gallerys or oil return and connects on the fuel filter, a plurality of oil gallerys or oil return connect and be connected with injection pump oil gallery and sprayer oil gallery respectively. The utility model discloses a fuel filter passes through the oil gallery or the oil return connects and the injection pump, the oil gallery of sprayer etc. Is connected, the fuel that makes the major part do not not used is got back to the fuel filter and is circulated, need not to design fuel distributor or other transition joint and always return the oil tank that oil pipe got back to car or cabin, it is succinct pleasing to the eye to fire the oil pipe way, the fuel oil system part is few, the product development cycle is shortened, development and manufacturing cost is reduced, convenient assembly is maintained with maintaining, and the product is popularized and applied easily.

Automatic change supplementary anchor clamps

The utility model discloses an automatic change supplementary anchor clamps, comprising a base plate, the top fixedly connected with pillar of bottom plate, the top swing joint of pillar has the hinge, the back swing joint of hinge has first splint, the back swing joint of first splint has the second splint, the bottom swing joint of first splint has spiral shell rasp bar, spiral shell rasp bar'ssurperficial swing joint has first drive belt, the top of bottom plate just is located spiral shell rasp bar's the first motor of left side fixedly connected with, the output of first motor is connected through first drive belt and the transmission of spiral shell rasp bar, spiral shell rasp bar's the surperficial top swing joint who just is located first drive belt has the secondary drive area, the top of bottom plate just is located spiral shell rasp bar's right side fixedly connected with second motor. The utility model discloses a cooperation of spiral shell rasp bar, first motor, second motor ...

Method for treating precious metal-selenium raw material

The invention relates to a method for treating a precious metal-selenium raw material, comprising the following processing steps: adding water and the precious metal-selenium raw material into a slurrying tank for slurrying; pumping the material after slurrying into a pressure kettle; opening up the pressure kettle to stir the slurry, and adding sodium hydroxide into the kettle by a vacuum feeding machine; heating and leaching at normal pressure and constant temperature; introducing high-pressure oxygen at constant temperature and constant pressure to carry out an oxidation reaction; stopping heating and cooling to be close to room temperature by virtue of cold water; and carrying out filter pressing on the solution discharged by the pressure kettle until the solution is clear. The selenium content of the precious metal-selenium raw material used in the invention is more than 25%, leaching is carried out in sodium hydroxide aqueous solution, then oxygen oxidation is carried out at certain ...

Method for preparing copper-indium-gallium-selenium alloy

The invention discloses a method for preparing copper-indium-gallium-selenium (CIGS) alloy. The method comprises the following steps of: crushing simple substances copper, indium, gallium and selenium, and taking materials according to a mass ratio; mixing copper, indium, and gallium and then loading into a clean large quartz boat; loading selenium into another small quartz boat separately; placing the two quartz boats horizontally and sequentially into a quartz tube; vacuumizing the quartz tube and sealing the quartz tube; horizontally placing the quartz tube in a heating furnace, heating section by section synchronously and keeping constant temperature, wherein the constant temperature of a low-temperature section is 500 to 800 DEG C, and the constant temperature of a high-temperature section is 800 to 1,200 DEG C, namely the heating furnace is divided into two sections of temperature areas; and after keeping the constant temperature for 10 to 20 hours, cooling to room temperature and ...

Method for producing bismuth oxide by pyrogenic process

The invention discloses a method for producing bismuth oxide by a pyrogenic process. The method comprises the following steps of: crushing a bismuth ingot into powder, sieving the powder, adding the powder into a horizontal rotary oxidation furnace, raising the temperature, controlling the temperature of the oxidation furnace in a step-by-step heating way, wherein the step-by-step heating comprises repeated temperature rise stage and temperature-consistent stage, at the same time, introducing oxygen to oxidize the bismuth powder, after the oxidization stage is finished, stopping introducing oxygen, reducing the temperature to the room temperature and taking out the powder to obtain the bismuth oxide. Compared with the prior art, the method adopts the rotary furnace to achieve the effect of 'stirring'. The step-by-step temperature rise and temperature control measure contributes to full contact and oxidation reaction between the bismuth in various phase states and under different active ...

Method for producing selenic acid barium

The invention discloses a producing method of a barium selenate, comprising the following procedures: firstly, 200 to 250g selenium dioxide are added into 1.5 to 2L water and dissolved completely via stirring; secondly, 150 to 180g sodium hydroxide are added into selenium dioxide solution of the first procedure, stirring uniformly; then 400 to 600g barium chloride and 100 to 200g oxidant are added to react completely and generate sedimentation; thirdly, 15 to 25g acid are used to pickling the sedimentation generated in the reaction of the second procedure; fourthly, the finished product is obtained after pressure filtering, drying and smashing the pickling sedimentation. The invention has the advantages of simple equipment, high productivity of single equipment, low production cost, and high utilization ratio of selenium.

Integrated form blender of gaseous engine

The utility model discloses an integrated form blender of gaseous engine. This integrated form blender includes: the blender body, its blender and therapeutic method to keep the adverse qi flowing downward rail of being in the same place including the integration, the blender is the tubulose, and the one end of this tubulose blender is held for air inlet, and the other end of this tubulose blender is the mist exit end to be provided with the import of first natural gas, this mist exit end is provided with the blender core, therapeutic method to keep the adverse qi flowing downward rail is the tubulose, and is integrated in the side of tubulose blender, exit end and this first natural gas import intercommunication of therapeutic method to keep the adverse qi flowing downward rail, go up the gas rail, pressure connection, and nozzle assembly, it includes: spray metering valve and thrust gum cover. This integrated form blender integrated level is high, arranges the convenience for gaseous ...

Coal fired boiler capable of controlling flue gas oxygen content

The invention relates to a coal fired boiler capable of controlling flue gas oxygen content, which comprises a furnace body provided with a fire grate and a hearth, wherein the lower part of the fire grate is provided with a furnace bottom wind box; fuel gas in the hearth is exhausted from a chimney by a draught fan after passing through a venturi passage and a dust remover; an oxygen content analysis sensor is arranged between the hearth and the venturi passage and is connected with an oxygen content PLC; a fuel gas return pipe provided with a circulating fan is arranged between the draught fan and the chimney; the other end of the oxygen content analysis sensor is connected with an upper layer fuel gas return pipe with an upper layer fan and a wind box fuel gas return pipe respectively; the upper layer fuel gas return pipe is provided with an upper layer wind control valve, is controlled by the oxygen content PLC and is communicated with the hearth; the wind box fuel gas return pipe is ...

Building smart park management system based on BIM technology

The invention discloses a building smart park management system based on a BIM technology, and relates to the technical field of smart park management, the building smart park management system comprises a park management platform, the park management platform comprises a monitoring system, the output end of the monitoring system is electrically connected with a BIM system, the input end of the BIM system is electrically connected with a smoke sensing system and an illumination system, and the smoke sensing system is electrically connected with the illumination system. And the output end of the BIM system is electrically connected with a display module. Compared with the prior art, the building smart park management system based on the BIM technology has the beneficial effects that the access control system is arranged, the identification unit is arranged in the access control system and used for carrying out license plate identification operation on vehicles entering the park, and when ...

Method for producing selenic acid barium

Method for preparing copper-indium-gallium-selenium alloy

The invention discloses a method for preparing copper-indium-gallium-selenium (CIGS) alloy. The method comprises the following steps of: crushing simple substances copper, indium, gallium and selenium, and taking materials according to a mass ratio; mixing copper, indium, and gallium and then loading into a clean large quartz boat; loading selenium into another small quartz boat separately; placing the two quartz boats horizontally and sequentially into a quartz tube; vacuumizing the quartz tube and sealing the quartz tube; horizontally placing the quartz tube in a heating furnace, heating section by section synchronously and keeping constant temperature, wherein the constant temperature of a low-temperature section is 500 to 800 DEG C, and the constant temperature of a high-temperature section is 800 to 1,200 DEG C, namely the heating furnace is divided into two sections of temperature areas; and after keeping the constant temperature for 10 to 20 hours, cooling to room temperature and ...