Hinge positioning jig

The invention provides a positioning fixture which comprises a bottom board, a first positioning mechanism and a second positioning mechanism. The first positioning mechanism includes a bearing board and a first locking device which are respectively fixed on the bottom board, wherein limiting blocks are respectively fixed on the bearing board and the first locking device, and the first locking device is capable of driving the limiting blocks on the first locking device to move between a locking position for fixing a notebook host on the bearing board and a release position for releasing the notebook host. The second positioning mechanism includes a pair of bases fixed on the bottom board, the pair of bases is adjacent to each other and shares a common axis, a positioning face is formed on the lateral face of the base facing the bearing board, positioning poles are formed on a bottom face of the positioning face, and a second locking device for retaining hinges within the positioning face ...

Method for measuring rope force of multi-span steel stay rope by using multi-frequency method

The invention relates to a method for measuring a multi-span steel stay rope by using a multi-frequency method. The implementation process thereof comprises the following steps: acquiring a time-domain vibration signal, obtaining self vibration frequency passing through n plus 1 order by fast Fourier transform and frequency spectrum analysis, then establishing a frequency characteristic equation with a jack stay rope structural vibration model, establishing a least square method optimization objective function according to the frequency characteristic equation, taking the obtained self vibration frequency of n plus 1 order into the objective function, and obtaining the rope force and the restriction rigidity of the jack stay. The method solves the problem that the traditional dynamic measurement method can be not used for detecting the rope force of the rope with the jack stay, and has simple and convenient technical implementation process, high measurement accuracy of rope force and the ...

Cage-shaped football field

The invention relates to a cage-shaped football field which comprises a field (1) with the periphery enclosed by a fence (2), and is characterized in that: a goal (3) is arranged in the middle position of the two opposite ends of the fence, a bracket (4) is arranged at the corresponding position of the outside of the fence and the goal (3) and provided with a goal net (41) enclosing the back partof the goal, and the fence is also provided with a door (5) for people to pass in and out. The goal in the football field and the whole fence are connected into a whole, and other goals need not to bearranged in the field, furthermore, the goal outwardly protrudes out of the field, and effectively increases the ball-kicking space, therefore, the cage-shaped football field is a novel place which is specifically suitable for kicking ball.

Cage-shaped football field

The invention relates to a cage-shaped football field which comprises a field (1) with the periphery enclosed by a fence (2), and is characterized in that: a goal (3) is arranged in the middle position of the two opposite ends of the fence, a bracket (4) is arranged at the corresponding position of the outside of the fence and the goal (3) and provided with a goal net (41) enclosing the back part of the goal, and the fence is also provided with a door (5) for people to pass in and out. The goal in the football field and the whole fence are connected into a whole, and other goals need not to be arranged in the field, furthermore, the goal outwardly protrudes out of the field, and effectively increases the ball-kicking space, therefore, the cage-shaped football field is a novel place which is specifically suitable for kicking ball.

Internal-combustion engine gas fuel injection apparatus and control device thereof

The invention relates to a fuel injection and control device, in particular to a gas fuel injection device and a control device of an internal-combustion engine, which comprises a valve body. A fuel gas inlet is communicated with a fuel gas valve cavity, and a hydraulic plunger coupled part is arranged at the upper part inside the valve body; a fuel gas valve rod is in close contact with the lowerpart of the hydraulic plunger coupled part through the fuel gas valve cavity; fuel gas valve springs are wound outside the gas valve rod; the upper ends of the springs in fixed connection with the upper end of the gas valve rod, and the lower ends thereof are supported on the valve body; the upper part of the hydraulic plunger coupled part is communicated with a control mouth of a two-position three-port high speed solenoid valve; the oil inlet of the two-position three-port high speed solenoid valve is communicated with an accumulator common rail tube through an oil pipeline; the return-oilinlet ...

Method for measuring rope force of multi-span steel stay rope by using half-wave method

The invention provides a method for measuring the rope force of a multi-span steel stay rope by using a half-wave method. The method comprises the following steps: equalizing the multi-span jack stay vibration into a jack stay form with any restriction boundary; then equalizing the multi-span jack stay vibration into a single rope vibration form with the length of Ln and the frequency of fn; and using the single rope vibration theory to calculate the rope force. Compared with the traditional technology for detecting the rope force by using the frequency method, the main difference of the method is as follows: an equivalent single rope vibration model is established by high-order local vibration of the stay rope, and the rope force is calculated by using the calculation theory of the rope force of single rope. The invention has the advantages of simple method principle, strong applicability and suitability for measuring the rope force of various jack stay forms and the like, and can be widely ...

Internal-combustion engine gas fuel injection apparatus and control device thereof

The invention relates to a fuel injection and control device, in particular to a gas fuel injection device and a control device of an internal-combustion engine, which comprises a valve body. A fuel gas inlet is communicated with a fuel gas valve cavity, and a hydraulic plunger coupled part is arranged at the upper part inside the valve body; a fuel gas valve rod is in close contact with the lower part of the hydraulic plunger coupled part through the fuel gas valve cavity; fuel gas valve springs are wound outside the gas valve rod; the upper ends of the springs in fixed connection with the upper end of the gas valve rod, and the lower ends thereof are supported on the valve body; the upper part of the hydraulic plunger coupled part is communicated with a control mouth of a two-position three-port high speed solenoid valve; the oil inlet of the two-position three-port high speed solenoid valve is communicated with an accumulator common rail tube through an oil pipeline; the return-oil inlet ...

System and method for automatically protecting railway safety

The invention relates to a system and a method for automatically protecting railway safety, which mainly solve the problem of the safety of field construction personnel in railway. The system comprises a microcomputer signal detection system; the system is characterized by also comprising a main protection module positioned inside a telecommunication service machine room of a railway station and a wireless automatic protection terminal carried by the field operation personnel; the main protection module comprises a wireless communication unit, an embedded type microcontroller, a station area and a circuit subdivision data memory, a protecting program memory, a graphic text display with a key operation device and a CAN controller. The main protection module acquires train running information from the microcomputer signal detection system through the CAN controller; after the protective information is formed, the protective information is transmitted to the wireless automatic protection terminal ...

Environment-friendly osmotic sealing bottom coating for concrete

The invention provides an environment-friendly osmotic sealing bottom coating for concrete. The bottom coating adopts a double-component reactive bottom coating material, wherein a component A and a component B are mixed in a ratio of 1:0.5-2; in portion by weight, the component A comprises 200 to 500 portions of epoxy resin emulsion or 80 to 120 portions of epoxy resin, 0.001 to 3 portions of antifoaming agent, and 0 to 10 portions of functional assistant; and the component B comprises 100 to 200 portions of epoxy curing agent emulsion, 0 to 20 portions of accelerating agent, 1 to 200 portions of toughening agent, 0.001 to 3 portions of antifoaming agent, 0 to 10 portions of functional assistant, and 0 to 200 portions of inorganic filler. The bottom coating has the advantages that: 1) the bottom coating has the characteristics of coating permeability, closure property and high adhesive strength with a body material, forms a continuous coating after being coated, blocks capillary pores ...

Environment-friendly osmotic sealing bottom coating for concrete

The invention provides an environment-friendly osmotic sealing bottom coating for concrete. The bottom coating adopts a double-component reactive bottom coating material, wherein a component A and a component B are mixed in a ratio of 1:0.5-2; in portion by weight, the component A comprises 200 to 500 portions of epoxy resin emulsion or 80 to 120 portions of epoxy resin, 0.001 to 3 portions of antifoaming agent, and 0 to 10 portions of functional assistant; and the component B comprises 100 to 200 portions of epoxy curing agent emulsion, 0 to 20 portions of accelerating agent, 1 to 200 portions of toughening agent, 0.001 to 3 portions of antifoaming agent, 0 to 10 portions of functional assistant, and 0 to 200 portions of inorganic filler. The bottom coating has the advantages that: 1) the bottom coating has the characteristics of coating permeability, closure property and high adhesive strength with a body material, forms a continuous coating after being coated, blocks capillary pores ...

Screw locater

The present invention provides a screw positioner, which is used to aim at a screw hole and assist in locking screws. The screw positioner comprises a handle, a guiding part and a conversion part. One end of the handle is firmly connected with the guiding part. The guiding part comprises a first end surface firmly connected with the handle and a second end surface opposite to the first end surface, and moreover, the guiding part is provided with a guiding throughhole penetrating the first end surface and the second end surface, which is vertical to the second end surface. The conversion part, which is positioned in the guiding throughhole, comprises a head part and a tail part; wherein, the head part is provided with a screwdriver head structure; the rear end surface of the tail part is grooved. The screw positioner is used to assist an electric screwdriver to vertically lock screws.

Multifunctional treadle mill

System and method for automatically protecting railway safety

The invention relates to a system and a method for automatically protecting railway safety, which mainly solve the problem of the safety of field construction personnel in railway. The system comprises a microcomputer signal detection system; the system is characterized by also comprising a main protection module positioned inside a telecommunication service machine room of a railway station and awireless automatic protection terminal carried by the field operation personnel; the main protection module comprises a wireless communication unit, an embedded type microcontroller, a station area and a circuit subdivision data memory, a protecting program memory, a graphic text display with a key operation device and a CAN controller. The main protection module acquires train running information from the microcomputer signal detection system through the CAN controller; after the protective information is formed, the protective information is transmitted to the wireless automatic protectionterminal ...

Method for measuring rope force of multi-span steel stay rope by using half-wave method

The invention provides a method for measuring the rope force of a multi-span steel stay rope by using a half-wave method. The method comprises the following steps: equalizing the multi-span jack stay vibration into a jack stay form with any restriction boundary; then equalizing the multi-span jack stay vibration into a single rope vibration form with the length of Ln and the frequency of fn; and using the single rope vibration theory to calculate the rope force. Compared with the traditional technology for detecting the rope force by using the frequency method, the main difference of the method is as follows: an equivalent single rope vibration model is established by high-order local vibration of the stay rope, and the rope force is calculated by using the calculation theory of the rope force of single rope. The invention has the advantages of simple method principle, strong applicability and suitability for measuring the rope force of various jack stay forms and the like, and can bewidely ...

Aluminum rim casting mold

The invention discloses an aluminum rim casting mold which comprises a main mold body, wherein a cooling channel structure is arranged inside a high-temperature heated position of the main mold body; the inlet of the cooling channel structure is connected with a water-gas mixing device for supplying water mist; and the outlet of the cooling channel structure is connected with a recovering circulation device. In the invention, the cooling channel structure is arranged inside the high-temperature heated position of the casting mold and is connected with the water-gas mixing device for supplying the water mist, so that heat is taken away by the circulation of the water mist in the cooling channel structure, the cooling effect is good, the normal service life of the mold is not influenced, the high-temperature heated position can be effectively and partially cooled, a position needing to be cooled is cooled accurately at a fixed point, the production efficiency and stability are high, the water ...

Hydrogen-combustion-supporting liquid ammonia direct injection multi-stage rotational flow combustion chamber

A liquid ammonia direct injection multi-stage rotational flow combustion chamber with combustion supported by hydrogen comprises fuel nozzles at the axis position, the fuel nozzles comprise a liquid ammonia nozzle and a hydrogen nozzle, and hydrocyclones are installed on the peripheries of the fuel nozzles. The swirler is mainly composed of two stages of axial swirl vanes which are coaxial and opposite in rotation direction, two stages of radial swirl vanes which are coaxial and opposite in rotation direction and four stages of flow guide rings used for guiding flow of compressed air, and the swirler is used for stabilizing combustion of ammonia. The flame tube is connected with a fourth-stage flow guide ring of the swirler, it is guaranteed that fuel and swirling air enter the flame tube, and a secondary air hole, a mixing hole and an air film cooling hole are formed in the middle of the flame tube, so that secondary combustion is achieved, emission of nitric oxide is reduced, and the ...

Quick-drying type composite water-proof paint and preparation thereof

The invention discloses a quick-drying compound waterproof coating and a preparation method thereof; wherein, a liquid material comprises 1 part of acrylic emulsion, 0.1 to 0.3 part of VAE emulsion, 0.001 to 0.008 part of defoamer, 0 to 0.018 part of flexibilizer DBP, 0 to 0.09 part of film-forming auxiliary agent propylene glycol and 0.01 to 0.05 part of dispersant; a powder material comprises 1 part of sulphoaluminate cement, 0.01 to 0.15 part of mica powder, 0 to 0.12 part of fly ash, 0.01 to 0.12 part of heavy calcium carbonate powder and 0.001 to 0.005 part of polycarboxylic acid powder; and the mixture ratio of the liquid material to the powder material is 0.7: 1 to 1.5: 1. The quick-drying compound waterproof coating has the following advantages: (1) the quick-drying compound waterproof coating has the quick-drying performance at room temperature; (2) a coating film has good elasticity and flexibility; (3) the quick-drying compound waterproof coating can be constructed on a wet base ...

Turnout repulsion stroke monitoring method and device, terminal and storage medium

The invention belongs to the technical field of railway monitoring, and particularly provides a turnout repulsion stroke monitoring method and device, a terminal and a storage medium, and the method comprises the steps: collecting the displacement of a target switch machine indication rod into a displacement image through an image displacement sensor integrating an optical module, a photoelectric sensor and a non-visible light source; the collected displacement image is converted into a displacement digital signal of an indication rod of the target switch machine through an analog-to-digital conversion unit and a digital signal processor, the displacement amount of the target switch machine is calculated, and when the displacement amount of the target switch machine exceeds a pre-stored displacement threshold value, an alarm is given to inform monitoring personnel to carry out maintenance; the switch rail switch tip structure is prevented from being damaged, and derailing accidents are ...

Eccentric locater for screwdriver

The invention provides a starter eccentric positioner, which comprises a supporting plate, an eccentric converting part, a driving shaft, and an inserting end. One end of the supporting plate is fixed on an electric starter. The eccentric converting part is arranged on the other end of the supporting plate and comprises a plurality of gears engaged with each other, wherein the gears at least comprise an input gear and an output gear. The driving shaft transmits the driving force of the electric starter to the input gear. The inserting end is fixedly connected with the output gear. The electric starter with the starter eccentric positioner can lock screws vertically at places where the space is narrow and the electric starter cannot be put in completely.