Method for preparing binder-free graphite product

The invention provides a method for preparing a binder-free graphite product, which is characterized in that the graphite product is composed of crude petroleum coke and coal pitch mesophase pellet powder, and is characterized by comprising the following steps: drying, dewatering and smashing the crude petroleum coke; grinding the smashed crude petroleum coke to obtain crude petroleum coke powderby using a ball mill and an airflow pulverizer in sequence; heating the coal pitch mesophase pellet powder to carry out pre-oxidation treatment; cooling to room temperature; fully mixing by a blender; charging under vibration and preforming; placing blended power into a hydraulic cylinder, and obtaining isostatic pressing graphite green bodies through the steps of boosting pressure, maintaining pressure, reducing pressure and demoulding in an isostatic pressing forming process; placing the isostatic pressing graphite green bodies into an iron crucible; taking river sand and metallurgical cokepowder ...

Method for improving coercive force of samarium-cobalt magnet through rapid heating and cooling pretreatment

The method for improving the coercive force of the samarium-cobalt magnet comprises the steps that metal raw materials are placed in a vacuum induction furnace according to the proportion to be smelted to obtain a cast ingot, and the cast ingot is crushed to obtain alloy powder; carrying out die forming on the alloy powder in a magnetic field, and then carrying out cold isostatic pressing to obtain a green body; carrying out sintering and solution treatment on the green body to obtain a sintered magnet; the temperature of the sintered magnet is increased to 400-800 DEG C in a heat treatment furnace at the temperature increasing rate of 50-150 DEG C/s, heat preservation is conducted for 30-300 s, and then the temperature is decreased to the room temperature at the temperature decreasing rate of 5-50 DEG C/s; the sintered magnet is cooled to the room temperature after being subjected to aging treatment, the samarium-cobalt magnet is obtained, the aging treatment is divided into two steps, ...

Rat preventer for operation and maintenance of transformer substation

The ratproof device comprises a baffle, the left end and the right end of the baffle are each provided with a containing cavity used for containing an extension plate, the bottoms of the containing cavities are open, the top ends of the containing cavities are of a closed structure, T-shaped grooves are formed in the inner walls of the top ends of the containing cavities, and T-shaped edges slidably connected with the T-shaped grooves are arranged at the top ends of the extension plates; two long round holes are formed in the upper surface of the baffle, each long round hole is communicated with the T-shaped groove of the corresponding containing cavity, a stud is arranged on the upper surface of each extension plate, the top end of each stud is located above the corresponding long round hole and is in threaded connection with a nut, and the extension plates can be fixed through cooperation of the studs and the nuts; the ratproof device further comprises two fixing seats, the fixing seats ...

Solar semiconductor refrigerator

Fabricated building laminated slab storage and maintenance device

The invention discloses a fabricated building laminated slab storage and maintenance device, and relates to the technical field of fabricated buildings, the fabricated building laminated slab storage and maintenance device comprises a maintenance chamber, a placing mechanism is arranged in the maintenance chamber, an air injection mechanism is arranged outside the maintenance chamber, and the placing mechanism comprises a placing plate, a support and a stabilizing plate; the air injection mechanism comprises a steam pump, a connecting pipe and an air injection pipe. The steam pump is started to introduce external steam, the solar panel converts solar energy into high-temperature medium oil, then the high-temperature medium oil heats water to generate steam to replace a heat distribution pipeline to supply steam, the connecting pipe conveys the hot steam into the steam spraying pipe, the hot steam is sprayed to the laminated slab, and the laminated slab is maintained. And redundant hot steam ...

A frock that is used for car seat backrest adjuster torque sensing and transfers delivery position

The utility model provides a frock that is used for car seat backrest adjuster torque sensing and transfers delivery position, including the pressure head that floats, unsteady pressure head includes: the frock body, slide mechanism, slide mechanism is provided on the frock body, a lift positioning element is provided on the slide mechanism for the locking working head, drive mechanism, drive mechanism with slide mechanism connects, the working head for the installation work piece, the working head with drive mechanism's one end is connected, through slide mechanism is in horizontal migration under drive mechanism's the drive realizes lift positioning element is right the locking of working head. The utility model discloses a frock that is used for car seat backrest adjuster torque sensing and transfers delivery position is the manual frock of function integral type, can realize the free break -in detect operation moment of torsion of backrest adjuster to and the function of adjustment ...

Bus load prediction method based on weather factor fuzzification processing

The invention provides a bus load prediction method based on weather factor fuzzification processing. The bus load prediction method comprises the steps that 1, transformer substation load data are extracted from an SCADA system to serve as sample data; 2, preprocessing the sample data to repair the sample data; step 3, carrying out fuzzy processing on the weather factors; and step 4, using the generalized regression neural network to predict the load of the transformer substation bus. According to the bus load prediction method based on the weather factor fuzzification processing, the influence of the air temperature and the weather type on the bus load of the transformer substation is relatively large, and the weather factor is fuzzified to serve as the influence factor of the bus load of the transformer substation for neural network modeling; and compared with a direct prediction mode in the prior art, the prediction precision is greatly improved.

Gas chromatograph carrier gas purification device and purification method

The invention discloses a gas chromatograph carrier gas purification device and a gas chromatograph carrier gas purification method, relates to the technical field of gas chromatograph carrier gas purification devices, and solves the problem that a filter screen which is used for many times causes pollution to carrier gas. The gas chromatograph carrier gas purification device comprises a chromatograph, a sample injection port column is fixedly welded to the middle of the upper end of the chromatograph, an injector is inserted into the upper end of the sample injection port column, and the rear end of the upper side of the sample injection port column is connected with a pushing linkage mechanism; and the rear end of the pushing linkage mechanism is connected with a filter screen temporary storage mechanism. A filter screen in the ventilation column can be transversely controlled through an annular matching block on the upper side, so that the filter screen can be separated from the interior ...

Reciprocating type pneumatic shifting reverser

The invention relates to a reciprocating type pneumatic shifting reverser which comprises a water inlet nozzle, a movable component, a shell body, a water divider, an air cylinder and a pinger. The water inlet nozzle is fixedly arranged above the movable component, the movable component is arranged on two rails in the shell body in a sliding mode, a piston rod of the air cylinder is connected with the movable component, and the movable component is driven to do reciprocating linear motion on the two guide rails in the shell body through a sliding bearing. The movable component is provided with a left water dividing opening and a right water dividing opening, and when the movable component moves, an inlet of the left water dividing opening and an inlet of the right water dividing opening alternatively correspond to the water inlet nozzle, and an outlet of the left water dividing opening and an outlet of the right water dividing opening correspond to a left bucket and a right bucket of the ...

Floating clamping mechanism mechanism reaches guiding orientation frock including it

The utility model provides a floating clamping mechanism mechanism reaches guiding orientation frock including it for the car seat backrest adjuster, floating clamping mechanism mechanism includes: locating hole and a plurality of part mounting groove have been seted up to the locating plate on, a plurality of part mounting grooves include first mounting groove and second mounting groove, two surfaces that first mounting groove and second mounting groove relatively are provided the locating plate, the fixed block is in the fixed first mounting groove that corresponds to the locating plate on, the rocker piece, with fixed block sliding connection, and the rocker piece inlays in the corresponding second mounting groove of disposed on, the inner wall that the mounting hole that is equipped with elastomeric element on the rocker piece and is used for placing the work piece, rocker piece pass through elastomeric element and second mounting groove offsets for the rocker piece removes along the ...

Method for detecting deadlock in network on chip

The invention discloses a method for detecting a deadlock in a network on a chip and aims at providing a method for immediately and accurately detecting a deadlock once the deadlock occurs. According to the technical scheme, the method comprises the following steps: creating a channel waiting network with the synchronous function according to a topologic interconnection structure of a routing network; detecting the deadlock based on the channel waiting network every a time interval T after starting the routing network; obtaining initial waiting relationships between corresponding channels and adjacent channels by CWL (Channel Wait Label) modules, and removing channels without waiting relationships with adjacent channels through logic detection, namely enabling channels corresponding to the rest CWLs after the CWL modules with input or output signals being 0 in the channel waiting network reach a steady-state network to be existent in a deadlock node. The method can be used for finishing ...

Axle for coal mine

The utility model relates to an axle for coal mine, including front axle and the rear axle of connecting, front axle includes first motor mount pad, a steering cylinder, second motor mount pad, the 2nd steering cylinder and mounting platform link, a steering cylinder's both ends respectively with first motor mount pad, mounting platform link rotatable coupling, the 2nd steering cylinder's both ends respectively with second motor mount pad, mounting platform link rotatable coupling. The utility model relates to a, it is easy to make, produce, simple structure, and safe and reliable, the adaptation is work under rugged environment, simultaneously, the utility model discloses bearing capacity is strong, and the automobile body is narrow, and is strong in the coal mine tunnel handling capacity, and the convenience is given another the right of way in the tunnel.

LNG storage tank for diesel-LNG hybrid power ship

The invention discloses an LNG storage tank for a diesel-LNG hybrid power ship. The LNG storage tank comprises a sealed shell and a sealed inner container arranged in the shell, wherein the shell is provided with a first LNG filling pipe communicated with the bottom of the inner container; the inner container is supported in the shell through a plurality of glass steel pipe struts, and a heat insulation layer is wound on the inner container; an interlayer between the shell and the inner container is vacuum; the middle part of the inner container is provided with a wave-proof device; the wave-proof device comprises a central pipe and a support plate; the axis of the central pipe is superposed with the axis of the inner container; and the support plate is trumpet-shaped, an opening at the small end of the support plate is welded with the outer circumference surface of the central pipe, and an opening at the large end of the support plate is welded with the inner wall of the inner container ...

Method for determining kneading temperature of graphite electrode carbon paste

The invention discloses a method for determining the kneading temperature of graphite electrode carbon paste, which is characterized by comprising the following steps: testing the coking value Fc and the physical and chemical indicator of a softening point Sp of asphalt used as binder; establishing a mathematic empirical formula of kneading temperature t of the graphite electrode carbon paste; determining ranges of the upper limit and the lower limit of the kneading temperature of the graphite electrode carbon paste by calculation; determining another mathematic empirical formula of the kneading temperature t of the graphite electrode carbon paste according to the dynamic viscosity testing value of the asphalt in different conditions; and determining the ranges of the upper limit and the lower limit of the kneading temperature of graphite electrode carbon paste by calculation. The method of the invention has the advantages of scientificalness and reasonableness, easily and accurately determined ...

Rubber tyer formula stock anchor rope drill carriage

The utility model discloses a rubber tyer formula stock anchor rope drill carriage, including walking portion, organism portion, drill boom portion, the mechanism that drills, interim supporting mechanism, pump station portion, electric system and hydraulic system, organism portion and pump station portion for rubber tyer formula running gear, are installed in the drill carriage bottom in the walking position on it, and drill boom portion and interim supporting mechanism are installed to the top of the walking portion that lies in of organism portion liftable on it, and drill boom portion and the mechanism that drills are connected, and pump station portion is controlled in the electric system connection, hydraulic system through pump station portion be used for controlling walking portion, organism portion, drill boom portion, drill mechanism and supporting mechanism temporarily. The utility model discloses can realize colliery secondary anchored mechanized operations in the pit, its whole ...

A vice valve for nozzle

The utility model relates to a nozzle accessory, concretely relates to a vice valve for nozzle that can prevent the inside remaining petrol of oil gun, including vice valve body, vice valve body include spring, valve body, case and gasket, the valve body pressure equipment in the barrel, case and valve body activity cartridge, and behind the case cartridge tip to pass through the nut fixed, spring suit on the case, the valve body on run through and have oil channel, the gasket setting at oil channel's oil -out edge, the gasket suit on the case, the main effect of vice valve guarantees that the petrol of remaining in the nozzle can not lead to leaking because of the maloperation, the wall of realization nozzle inner space that can be automatic, so as to is fine avoids the emergence of accident, to a certain extent, can save the use of petrol, especially, remaining petrol can be when refuel next time make full use of, seem careless some petrol, but because petrol belongs to non -renewable ...

Solar semiconductor refrigerator

The invention discloses a solar semiconductor refrigerator, which comprises a semiconductor refrigeration device, a solar-cell panel and a solar-cell panel output power voltage reduction, voltage stabilization and current device, wherein the input end of the solar-cell panel output power voltage reduction, voltage stabilization and current device is connected with the power output end of the solar-cell panel, while the output end is connected with the power supply input end of the semiconductor refrigeration device. The output power of the solar-cell panel is subjected to voltage reduction, voltage stabilization and constant flow treatment by the solar-cell panel output power voltage reduction, voltage stabilization and current device and then is directly supplied to the semiconductor refrigeration device without using a storage battery, so the structure of the solar semiconductor refrigerator is more stable, the weigh is lighter and the volume is smaller; in addition, a commercial power ...

Gettering cover mechanism of nozzle

The utility model relates to a nozzle accessory, one kind concretely relates to be at the gettering cover mechanism of nozzle of rifle body region installation, and this gettering cover establishment of institution is at the barrel position of nozzle, gettering cover mechanism include gettering cover, push rod mechanism, gettering cover be connected with push rod mechanism, the barrel medial surface be provided with a muffler, the rifle somatic part branch of barrel lateral surface be provided with one with the return -air passageway no. 1 of muffler intercommunication, push rod mechanism set up in the return -air passageway, return -air passageway and barrel in the intercommunication, the utility model discloses having installed gettering cover structure and push rod mechanism additional on original rifle body, can having guaranteed that oil gas does not leak when the oil feeding tank refuels, all oil gas pipeline get through simultaneously, guarantee simultaneously when filling it up ...

Front and rear rotating disk type straight pipe section device of flow standard device

The invention relates to a front and rear rotating disk type straight pipe section device of a flow standard device, which comprises a pulley (1), front and rear rotating disks (2a) and (2b), and a plurality of straight pipe sections (3) with different calibers, wherein a plurality of straight pipe sections (3) are installed on the front and rear rotating disks (2a) and (2b); four corners on the pulley (1) are provided with rolling wheels (4); the front and rear rotating disks (2a) and (2b) are led to revolving rolling and are supported by utilizing the rolling wheels (4); and the rotating disk (2a) is fixedly connected with a gear disk (5) matched with a transmission device (6), thereby driving the front and rear rotating disks to be rotated. When in use, the straight pipe section device provided by the invention selects the front and rear straight pipe sections, which have the same caliber as a detected flow meter, by rotating the rotating disks in order to achieve butt joint, and has ...

Variable error rate-oriented check point interval real-time determining method

The invention discloses a variable error rate-oriented check point interval real-time determining method and aims to provide a method for accurately measuring and calculating a real-time error rate and dynamically adjusting a check point interval executed by an application. According to the technical scheme, the method comprises the following steps: establishing a variable error rate based check point control system which is composed of a check point control module, an error rate measuring and calculating module and an error recovery module; judging if the present check point interval is finished or not and updating a check point state by the check point control module; performing error recovery by the error recovery module and measuring and calculating the error rate and confirming the check point interval by the error rate measuring and calculating module; lastly, setting the check point interval and resetting the starting of a check point by the check point control module. According ...

Heterogeneous metal inertia friction welding preheating equipment and using method

The invention provides heterogeneous metal inertia friction welding preheating equipment and a using method. The heterogeneous metal inertia friction welding preheating equipment is composed of a heating tower and a main machine. Wherein the heating tower comprises an inductor, an inductor contraction device, an infrared inductive probe and an electromagnetic fixing seat; the host comprises an induction power supply, a display panel and a controller. The method comprises the following operation steps: step A, fixing a heating tower; b, the heating frequency and the end face expected temperature are set, and the end face of the weldment is heated; and C, temperature monitoring is conducted, when the expected temperature of the end face is reached, an inductor contraction device is started, and friction welding is conducted on the two weldments. The device has the characteristics that firstly, induction preheating and temperature control can be carried out on two weldments made of different ...

Nozzle with vapor recovery system structure

The utility model relates to a nozzle, concretely relates to nozzle with vapor recovery system structure, the entry and the mechanical type gas -liquid ratio adjusting valve sealing connection of vapor recovery system nozzle, the vapor recovery system nozzle include barrel, air chamber part, pull rod part, trigger subassembly, barrel, pull rod part all partially communicate with the air chamber, mechanical type gas -liquid ratio adjusting valve entrance point sealing connection have a vacuum flow control valve, the barrel seal cover gettering cover is equipped with, the inside pressure equipment of barrel have a pair valve, gettering cover be connected with a push rod mechanism, the barrel medial surface be provided with a muffler, the rifle somatic part branch of barrel lateral surface be provided with one with the return -air passageway no. 1 of muffler intercommunication, push rod mechanism set up in return -air passageway no. 1. This product can prevent that oil gas from causing environmental ...

Proppant volume density measuring device

The utility model relates to a proppant volume density measuring device which comprises a base, a supporting rod, a funnel and a measuring cylinder, a connecting body is arranged in the center of the upper surface of the base, external threads are arranged on the peripheral wall of the connecting body, a connecting groove is formed in the bottom face of the measuring cylinder, and the measuring cylinder is connected with the connecting body through the connecting groove. The lower end of the supporting rod is connected to the left portion of the upper surface of the base, the upper end of the supporting rod is provided with a hinged shaft, the hinged shaft is horizontally hinged to the funnel, the funnel comprises a storage hopper, a guide cylinder and a piston, the guide cylinder is arranged at the lower end of the storage hopper, the lower surface of the guide cylinder is attached to the upper surface of the measuring cylinder, and the piston comprises a piston cylinder, a piston body ...

Swing nozzle formula commutator

The utility model provides a swing nozzle formula commutator, belongs to discharge calibrating installation technical field. Include water knockout drum, swing nozzle, tractive electromagnet, send out news ware, barn door, intake and always hold and the bedplate support, on the swing nozzle exposes and is fixed in the bedplate support, intake and always hold and swing the nozzle and be linked together, the swing arm both ends symmetric connection tractive electromagnet's of swing nozzle one end, two tractive electromagnet's the other end is fixed on the bedplate support, sends out news ware barn door and connects on the swing arm of swing nozzle one end, and water knockout drum fixed mounting sends out news ware, two tractive electromagnet external control system respectively on the nozzle end bedplate support of container top, swing nozzle. The utility model discloses but the wide application can be examined and determine in any small -size flowmeter calibrating installation who does not ...

Work measurer with prevent ripples ware

The utility model provides a work measurer with prevent ripples ware, belongs to the large -scale water flow rate standard facility technical field of static volume method. The work measurer includes the measurer body and the measurement neck that has the liquid level scale, is provided with in the space of measurement neck and prevents the ripples ware, falls after the rivers that will export the high flow rate are broken up, weakens decurrent the impacts strength of rivers, makes the interior rivers of entering work measurer at the uniform velocity stable. The utility model discloses eliminated the fluctuation, the water that the surface of water was steadily worked within 1 minute in the measurer just can stablize, the volume of the work of reading measurer that can the horse back accuracy. The utility model discloses simple structure, technology is succinct, save material, the processing cost is few, no maintenance cost. Expanded application is high to the velocity of flow, and reaction ...

Measurement standard's discharge device is regarded as with simple etalon

The utility model relates to a measurement standard's discharge device is regarded as with simple etalon, including simple etalon, secondary etalon, examination technology pipeline, water circle device, wherein, the outlet pipe line in pond among the entry linkage water circle device of simple etalon, the export of simple etalon gets into examination technology pipeline through secondary etalon, and examination technology pipeline is again through the return water mouth of return water pipeline connection to the pond. The utility model discloses demonstrate, proved the accuracy of measurement standard's quantity transmission, but wide application in any type of water flow meter's examination to can examine and determine on line, accord with the requirement of each item technical indicator, have fine effect, provide for relevant enterprise and authorize manufacturing neotype water flow rate standard facility, obtain certain economic benefits.

Intelligent control method of cable deicing robot

The invention provides an intelligent control method of a cable deicing robot. The method comprises an icing form prediction model based on an improved UNet neural network, a Bayesian classification model and a GBDT classification model. Wherein the UNet network model improvement mode is that batch standardized BN is added, a convolutional layer is optimized, a residual module and an attention module are added, the improved UNet network model is trained, and then an icing form prediction map can be obtained according to an original map. And after PCA dimension reduction is performed on the icing form prediction map, inputting the icing form prediction map into a naive Bayes classification model for training so as to realize prediction of icing categories. And finally, a GBDT classification model is established, icing categories and feature data information of meteorological data are collected for data modeling, then dimension reduction processing is performed, the processed data information ...

Method for manufacturing graphite electrode joint material

The invention relates to a method for manufacturing a graphite electrode joint material, which is characterized by comprising the following steps: raw material preparation: the raw materials comprise 70 wt% of 0-2mm secondary coke, 4 wt% of 0-2mm common crashed graphite, 12.5-13.5 wt% of Benxi steel moderate-temperature pitch and 12.5-13.5 wt% of moderate-temperature modified pitch; dosing: the size distribution comprises less than 2% of +2mm, 10% of -2+1mm, 12% of -1+0.5mm, 33% of -0.5+0.075mm and 45% of -0.075; and kneading, profiling, primary baking, impregnating, secondary baking and graphitizing to obtain the finished graphite electrode joint material. The invention has the advantages of scientific and reasonable method, short manufacturing cycle, energy conservation and environmental protection in the manufacturing process. The finished material has the advantages of high volume density, high strength, low cost and the like.

High conductive high strength graphite brick for ultralarge blast furnace, its production technology and application

Front and rear rotating disk type straight pipe section device of flow standard device

The invention relates to a front and rear rotating disk type straight pipe section device of a flow standard device, which comprises a pulley (1), front and rear rotating disks (2a) and (2b), and a plurality of straight pipe sections (3) with different calibers, wherein a plurality of straight pipe sections (3) are installed on the front and rear rotating disks (2a) and (2b); four corners on the pulley (1) are provided with rolling wheels (4); the front and rear rotating disks (2a) and (2b) are led to revolving rolling and are supported by utilizing the rolling wheels (4); and the rotating disk (2a) is fixedly connected with a gear disk (5) matched with a transmission device (6), thereby driving the front and rear rotating disks to be rotated. When in use, the straight pipe section device provided by the invention selects the front and rear straight pipe sections, which have the same caliber as a detected flow meter, by rotating the rotating disks in order to achieve butt joint, and has ...

Control device for remote operation

The invention relates to the technical field of remote operation control, and discloses a control device for remote operation, which comprises a fixedly arranged rack and a lifting mechanism arranged on the rack, and is provided with a lifting tail end capable of ascending or descending, and the lifting tail end is used for being connected with an execution mechanism for remote operation; the rotating mechanism is arranged on the rack and comprises a rotating output part, and the rotating output part is used for being in transmission connection with an executing mechanism for remote operation and driving the executing mechanism to rotate. The lifting mechanism can drive the executing mechanism to operate in the vertical direction and can be suitable for operation scenes where the executing mechanism needs to be conveyed to the position with a certain depth from the ground, and the position is inconvenient and not suitable for personnel to enter, for example, the lifting mechanism can be ...

Vehicle-mounted oil flow standard device

The invention relates to a vehicle-mounted oil flow standard device which comprises a truck, an electronic scale, a standard metal meter, a commutator, an oil storage tank and a power source. The electronic scale, the standard metal meter, the commutator, the oil storage tank and the power source form a skid to be mounted on the truck. The electronic scale is fixed to the skid and bears the standard metal meter. A liquid inlet of the standard metal meter is connected with a testing medium detected by a detected flow meter through the commutator and a connecting part. A liquid outlet of the standard metal meter is connected with the oil storage tank. The power source comprises a pneumatic part and an electric part, wherein the pneumatic part is connected with the commutator, and the electric part is powered by a power supply on the detection site. By means of the vehicle-mounted oil flow standard device, the problem that an oil flow instrument can not be detached for online calibration operation ...

Ceramsite proppant transport vehicle

The ceramsite proppant transport vehicle comprises a vehicle body, a tank body, a feeding port, a discharging hopper and a discharging mechanism, the discharging mechanism comprises a guide rod and a discharging pipe, the guide rod comprises a connecting rod, a rocker arm and a limiting rod, and the discharging pipe comprises a connecting ring, a fixing block, a connecting block, a lantern ring and a connecting cylinder. The left end of the connecting rod is connected with the right portion of the upper surface of the discharge hopper, the right end of the connecting rod is connected with the rocker arm through a spherical hinge, a first protruding lug on the discharge hopper is connected with the rocker arm through a positioning pin penetrating through a pin hole, a connecting cylinder is connected between every two adjacent connecting rings, and connecting blocks are arranged on the top faces of the three connecting rings on the right side and provided with circular through holes. A circular ...

Storage battery switching device for transformer substation

The storage battery switching device comprises a supporting frame, the supporting frame comprises an upper platform and a lower platform, the upper platform is marked as a mounting layer, the lower platform is marked as a storage layer, a plurality of storage battery mounting grooves are formed in the mounting layer at intervals, and a storage battery is assembled in each storage battery mounting groove; the storage battery switching device for the transformer substation comprises a plurality of connected storage battery power supply units, each storage battery power supply unit comprises three storage batteries and a standby storage battery, and a connecting frame and an electric switch are introduced in the connecting process of the storage batteries in each storage battery power supply unit. The electric connection or disconnection between the corresponding electrode conductive contact of the storage battery and the conductive contact of the connecting frame can be realized through the ...

Method for determining kneading temperature of graphite electrode carbon paste

The invention discloses a method for determining the kneading temperature of graphite electrode carbon paste, which is characterized by comprising the following steps: testing the coking value Fc and the physical and chemical indicator of a softening point Sp of asphalt used as binder; establishing a mathematic empirical formula of kneading temperature t of the graphite electrode carbon paste; determining ranges of the upper limit and the lower limit of the kneading temperature of the graphite electrode carbon paste by calculation; determining another mathematic empirical formula of the kneading temperature t of the graphite electrode carbon paste according to the dynamic viscosity testing value of the asphalt in different conditions; and determining the ranges of the upper limit and the lower limit of the kneading temperature of graphite electrode carbon paste by calculation. The method of the invention has the advantages of scientificalness and reasonableness, easily and accurately determined ...

Method for preparing binder-free graphite product

The invention provides a method for preparing a binder-free graphite product, which is characterized in that the graphite product is composed of crude petroleum coke and coal pitch mesophase pellet powder, and is characterized by comprising the following steps: drying, dewatering and smashing the crude petroleum coke; grinding the smashed crude petroleum coke to obtain crude petroleum coke powder by using a ball mill and an airflow pulverizer in sequence; heating the coal pitch mesophase pellet powder to carry out pre-oxidation treatment; cooling to room temperature; fully mixing by a blender; charging under vibration and preforming; placing blended power into a hydraulic cylinder, and obtaining isostatic pressing graphite green bodies through the steps of boosting pressure, maintaining pressure, reducing pressure and demoulding in an isostatic pressing forming process; placing the isostatic pressing graphite green bodies into an iron crucible; taking river sand and metallurgical coke powder ...

Narrow-fuselage six-arm fully hydraulic anchor rod anchor cable drill carriage

The invention provides a narrow-fuselage six-arm fully hydraulic anchor rod anchor cable drill carriage which is composed of a walking mechanism, a lifting mechanism, a temporary support mechanism, a drilling arm mechanism, a pump station part, an electrical system and a hydraulic system. According to the narrow-fuselage six-arm fully hydraulic anchor rod anchor cable drill carriage, two rotating workbenches are arranged in front of a machine body, and each rotating workbench is provided with two drilling arms which rotate by 90 degrees through the rotating workbenches, the drill carriage is folded to make the narrow fuselage state be only 1.4 m, passing of the drill carriage and an integrated extractor in a roadway is achieved, the drill carriage can be unfolded by 5 meters when reaching a roadway head-on, four front drilling arms mainly hit a top anchor rod, two rear drilling arms mainly hit a top anchor cable and a side anchor rod, the six drilling arms work simultaneously, rapid anchor ...

Method for determining reasonability of theoretic formula granularity composition of graphite electrode

The invention relates to a method for determining the reasonability of the theoretic formula granularity composition of a graphite electrode. The method is characterized in that the reasonability of the theoretic formula granularity composition of the graphite electrode is determined according to an R value obtained through using an equation shown in the specification, the critical point of the R value is 0.809, and the theoretic formula granularity composition is reasonable when R is not lower than 0.809, so the formula can be used in the production of the graphite electrode; and when R is smaller than 0.809, the theoretic formula granularity composition is unreasonable, so the formula cannot be used in the production of the graphite electrode. The method has the advantages of scientificity, reasonability, high practical application value, simplicity, easy implementation and substantial effect.

Inertia friction welding counterweight disc with adjustable rotational inertia

The invention discloses a rotational inertia adjustable inertia friction welding counterweight disc, and provides an adjustable inertia disc device for an inertia friction welding machine, which comprises an inertia disc, a guide rail, a counterweight block, a ball screw, an inner ring and an outer ring. The inertia disc is not easy to disassemble due to overweight, so that the inertia disc serves as a fixed inertia disc; the guide rail is arranged on the inertia disc and is marked with accurate scales; the balancing weight is supported by the guide rail and serves as a main part for adjusting rotational inertia, and accurate movement and control of the position of the balancing weight are achieved through the ball screw. The outer ring is arranged at the outer ends of the balance weight disc and the guide rail and plays a role in protection, and the inner ring is installed on the balance weight disc and plays a role in supporting and protection. The guide rail, the balancing weight, the ...

Pulse-width-adjustable double-light-path laser-argon arc hybrid welding equipment

The invention discloses pulse-width-adjustable double-light-path laser-argon arc hybrid welding equipment which comprises double-beam laser emission and argon arc welding integrated equipment, an argon arc welding wire feeder, a movable mechanical arm, a cooling water tank, an equipment operation table, a laser main machine and an argon arc welding box. One side of the clamping table is fixedly connected with the laser host, the other end of the clamping table is fixedly connected with the argon arc welding box, the side, away from the equipment operation table, of the laser host communicates with the cooling water tank, and the side, away from the equipment operation table, of the argon arc welding box is fixedly connected with a protective gas input device. The double-beam laser emission argon arc welding integrated equipment is installed over the clamping table, the movable mechanical arm is installed on one side of the clamping table and fixedly connected with the equipment operation ...

Nozzle suitable for filling station's secondary and on -vehicle vapor recovery system system

The utility model discloses a nozzle suitable for filling station's secondary and on -vehicle vapor recovery system system, including vapor recovery system nozzle, mechanical type gas -liquid ratio adjusting valve and vacuum flow control valve, vacuum flow control valve includes valve body and valve gap, is provided with the elastic diaphragm piece at the valve gap lower extreme, the diaphragm inner circle is fixed with the spring, and the diaphragm can reciprocate along with the spring, fit clearance formation gas transmission passageway between diaphragm inner circle and the valve body inner wall, the valve body front end is provided with gas circuit and oil circuit as oil gas import, valve body rear end as the oil gas export between front end and rear end, the oil gas import is connected to gas circuit one end, behind the gas transmission passageway that forms between diaphragm inner circle and the valve body inner wall, and other end intercommunication gas outlet be connected with the ...