34results about How to "Not easy to seal" patented technology

The invention discloses a water drinking container capable of easily precipitating and discharging scale deposit and impurities, comprising a water storage container provided with a water cavity and an opening, and a contamination discharge device arranged at the bottom of the water storage container. The water drinking container can remove the scale deposit and impurities, so as to be beneficial to health of the people and reduce the occurrence of 80% of kidney stone caused by the scale deposit; therefore, the water drinking container capable of easily precipitating and discharging the scale deposit and impurities can surely replace the traditional thermos flask, heat-preserving barrel and cup.

The invention relates to a forming method of a silicon through hole. The forming method comprises the following steps: providing a semiconductor substrate; forming a ring-shaped through hole in the semiconductor substrate, wherein the semiconductor substrate inside the ring-shaped through hole is an isolated semiconductor pillar; forming diffusion barrier layers on the side wall and at the bottom of the ring-shaped through hole; full filling the ring-shaped through hole with a conductive layer; removing all the semiconductor pillar or removing part of the semiconductor pillar to reserve part of a thickness until an opening with a depth-to-width ratio of greater than or equal to 20 is formed; and sealing the opening to form an air gap. According to the method, firstly the ring-shaped through hole is formed, the ring-shaped through hole is full filled with the conductive layer, then the semiconductor pillar formed inside the ring-shaped through hole in a surrounding manner is removed to form the opening and the opening is sealed to form the air gap; the air gap provides a large deformation space for plastic deformation of the conductive layer and is beneficial for releasing stresses in the conductive layer and an insulating layer; the possibility that a silicon through hole generates the layering and cracking phenomena is reduced; and reliability of the silicon through hole is improved.

The invention discloses a nanometer electromechanical vector hydrophone suitable for deep water. The nanometer electromechanical vector hydrophone further improves the sealing property, the high hydrostatic pressure resistance, the environmental suitability, the reliability and the similar indexes of an MEMS vector hydrophone. The nanometer electromechanical vector hydrophone comprises a stainless steel circuit tube shell, a necking tube shell, a fixed disc and an insulated annular tray, wherein the insulated annular tray is provided with a lug boss, the lug boss is provided with a round PCB board and a detecting chip, the insulated annular tray is formed with a sealing screw hole and a signal screw hole and is firmly connected with an acoustic cap, the acoustic cap is filled with silicon oil and antifoaming agent, and a support frame is arranged in the acoustic cap. The nanometer electromechanical vector hydrophone prevents the acoustic cap from deformation under high pressure and bubbles, enables the acoustic cap to be resistant to high hydrostatic pressure, and improves the environmental suitability, the underwater sound signal testing reliability, practicability, stability and so on. Under the high pressure, the internal pressure and the external pressure of the acoustic cap are balanced so as to bear the high hydrostatic pressure; the hydrostatic pressure resistance test proves that the nanometer electromechanical vector hydrophone is capable of working normally under the hydraulic pressure more than or equal to 20 Mpa.

The invention discloses an explosion-proof valve of a lithium ion storage battery with a simple structure and high safe reliability, which comprises a valve body (1), a needle body (2) and an explosion-proof film (3). The valve body (1) is provided with a vent hole (4); the needle body is fixedly connected to the upper end of the vent hole (4); a lower surface of the needle body (2) is provided with a conical contact probe (5); the explosion-proof film (3) is arranged at the lower end of the vent hole (4), and is hermetically assembled with the valve body (1); and the conical contact probe (5) points to the explosion-proof film (3) which is prepared from ethylene-propylene diene rubber as a raw material, has good elasticity and larger thickness, and is difficult to crack. Compared with the existing explosion-proof valve prepared from metal materials such as a copper foil, an aluminum foil and the like, the explosion-proof valve of the lithium ion storage battery greatly improves safe reliability of the battery and prolongs the service life of the battery.

The invention discloses a collector plate of a fuel cell. The collector plate of the fuel cell comprises a substrate plate, wherein the substrate plate is a nonmetallic substrate plate; one lateral surface of the substrate plate is coated with a coating layer, and the other lateral surface of the substrate plate is provided with a metal foil layer; the surface of the metal foil layer is coated with a gold coated layer. The collector plate of the fuel cell, which is provided by the invention, has the functions of electric conduction, insulation, sealing, shock absorption, back pressure, heat radiation and the like, and has a wide market prospect.

The invention discloses an easily-machined hydraulic corner self-servo compliant driver. According to the hydraulic corner self-servo compliant driver, blades of the driver are fixed on the outer wallof a valve body through screws, a threaded hole is formed in a face, in contact with a cylinder body, of a fixed stop block, mounting through holes, corresponding to the threaded holes, are formed inthe cylinder body, and the fixed stop block is arranged on the inner wall of the cylinder body in a matched mode through screws and the threaded holes; and rectangular grooves are formed in the two rectangular side faces of each blade, each of the two sides of a lower arc face of the blade is provided with an arc groove used for preventing the blade from being tightly stuck to the fixed stop block, and the rectangular grooves communicate with the arc grooves. The cylinder body and the valve body are arranged in a split mode, so that the sealing performance is excellent, the machining and theassembling are facilitated, leakage oil is guided out easily and conveniently, and sticking zones between the blades and the fixed stop block can be prevented; and meanwhile the driver should have thecharacteristics that the valve body and a valve element are stressed evenly and are not probe to shift, the dynamic property is high, the joint flexibility is high, the response speed is high, and the control precision is high.

The invention discloses a piston valve and a using and sealing method thereof. The piston valve comprises a three-way valve body, a piston and a driving mechanism, wherein the piston is positioned in a straight through pipe of the three-way valve body; the end of the straight through pipe is fixedly connected with a flange cover, and the other side of the flange cover is fixedly connected with the driving mechanism; a pull rod penetrates through a through hole in the flange cover and is in sliding fit with the flange cover; the two ends of the pull rod are connected with the piston and the driving mechanism respectively. An annular groove is formed in the inner surface of the through hole in the flange cover, and a sealing part is arranged in the annular groove; an air inlet and outlet structure is arranged on the flange cover. According to the piston valve and the using and sealing method thereof, the problems of complex structures of some types of valves, large pressure loss, poor sealing effect or inability to guarantee the sealing are solved, particularly the problem of sealing difficulty in the case of large caliber and high temperature is solved, and the problem that sealing is affected by deposition or erosive wear when impurities exist in the medium is solved.

The invention discloses an ocean system carbon neutralization method. A seaweed culture area is arranged on the sea surface; a burying robot and a capturing robot are arranged in the ocean; the capturing robot captures seaweeds in the seaweed culture area and then throws the captured seaweeds to the seabed; the burying robot is used for burying the seaweeds thrown by the capturing robot below the seabed at the seabed, so that the seaweeds are in an anoxic environment. Seaweed cultivation is carried out in the seaweed culture area, light above the sea surface permeates seawater to irradiate the seaweeds, so that water-soluble carbon dioxide is converted into organic matters by the seaweeds to grow and proliferate, inorganic carbon is transferred into the seaweeds from the seawater and exists in the form of organic carbon, and thus carbon in the sea is enriched to the seaweed culture area. The capturing robot captures and collects the seaweed in the seaweed culture area and puts the seaweed into the seabed, the burying robot buries the seaweed, organic carbon in the seaweed is transferred to the position below the seabed, and therefore the carbon in the seaweed is separated from ocean carbon circulation, and the purpose of carbon neutralization is achieved.

The invention disclose a novel drip-proof liquid feeding nozzle which comprises a feeding tube, a fastening component, a gasket and edible sponge, wherein the gasket is arranged on the upper surface of the edible sponge, and the edible sponge is arranged inside the feeding tube through the fastening component. The novel drip-proof liquid feeding nozzle has a simple structure; and the edible sponge and the gasket are arranged inside the feeding tube through the fastening component, and the edible sponge has a characteristic of adsorbing liquid, so that residual liquid is prevented from dripping on a package box, the work efficiency is improved, and the waste of resources is reduced.

The invention discloses packaging bag vacuumizing equipment, and relates to the field of packaging bags. The packaging bag vacuumizing equipment comprises an air exhaust cavity, a high-pressure barrel, a piston, first one-way valves and a fixed frame, wherein needle holes are formed in the lower surface of the air exhaust cavity; the lower end face of the high-pressure barrel is fixedly connected with the air exhaust cavity; the piston is in sliding connection with the inner wall of the high-pressure barrel; a pressing rod is arranged on the piston; the first one-way valves are arranged on the piston and arranged in the middle of the upper surface of the air exhaust cavity, and the air exhaust cavity is communicated with the high-pressure barrel through the first one-way valves; and the fixed frame is arranged on the top surface of the air exhaust cavity. The problems that an existing large food packaging bag vacuumizing device is large in size and weight, not liable to be moved and high in production cost, and fatigue can be generated after long-time work are solved.

A fuel gas adjusting valve comprises a valve body, a valve rod, a valve element and a driving device; the valve body is provided with a valve cavity, an air inlet channel, an inner ring air outlet channel and an outer ring air outlet channel; the valve rod is in linkage in valve element, and the valve element is movably arranged in the valve cavity of the valve body and can adjust the flow rate ofthe inner ring air outlet channel and the flow rate of the outer ring air outlet channel; and the driving device is provided with an output shaft, and the output shaft is connected with the valve rodto drive the valve element to move in the valve cavity in the axial direction. The fuel gas adjusting valve further comprises a first compression spring and a second compression spring, and the elastic coefficient of the second compression spring is larger than that of the first compression spring. By arranging the first compression spring, the valve rod is in flexible connection with the valve element, compared with the mode that a valve element is extruded to be sealed through the excessive stroke of an output shaft of the driving mechanism in the prior art, according to the fuel gas adjusting valve, through action of the first compression spring and the second compression spring, sealing is formed, damage of the first compression spring to the valve element is small, accordingly, the situation that sealing is influenced due to the fact that the valve element is damaged is avoided, and the safety is high.

The invention discloses a leakage-proof leak-stopping filler. The leakage-proof leak-stopping filler comprises the following raw materials in parts by weight: 6 to 15 parts of aluminum hydroxide, 8 to20 parts of silica powder for ceramic, 10 to 25 parts of talcum powder, 4 to 10 parts of sodium silicate, 10 to 20 parts of nano calcium carbonate, 2 to 10 parts of superfine calcium carbonate, 4 to20 parts of bluestone powder, 2 to 8 parts of graphite, 2 to 10 parts of white asphalt and 3 to 10 parts of calcium oxide. The preparation method comprises the following steps: sequentially adding thesubstances into a container according to the parts by weight at normal temperature and normal pressure, uniformly mixing and stirring, and drying, crushing or sieving to obtain a granular product with the particle size of 0.05-0.8 mm. The raw materials are widely available; both physical filling and chemical micro-coagulation effect are realized; the leakage-proof leak-stopping filler can be dissolved in liquid, and enter into micro cracks along with liquid phase to form micro-gel, so that filling effect is improved; gel filling of stratums with different porosities is realized, so that the coagulation performance is improved, the problem that introduction of large particles is impossible, and retention of small particles is impossible is solved; plugging success rate is increased; wide applications in petroleum and geological drilling process are realized, and the leakage-proof leak-stopping filler is particularly suitable for being applied to fractured hard stratums and sandstone stratums.

The invention discloses an intelligent granule packing machine. The machine comprises a rectangular shell for placing a plastic bag, the plastic bag is placed inside the rectangular shell, the plastic bag is adsorbed and expanded by negative pressure suction holes in the inner wall of the rectangular shell, granules enter a packing cavity through an upper opening of a packing box, the gravity of the granules pushes and drives the whole packing box to descend to stretch a spring, the purpose of putting the granules into the plastic bag after the packing box stretches into the plastic bag is achieved, packing devices on two sides of the packing box further expand an opening of the plastic bag, the situation that powder in the granules adheres to the opening of the plastic bag and is not prone to sealing is avoided, when the granules are blocked by check blocks on the inner wall of the packing cavity, the granules slowly move downwards, and powder impurities in the granules fall into a dust collection cavity from an inclined dust collection channel to be collected through the check blocks, so that the purpose of removing the powder impurities in the granules is achieved, and the situation that sealing and granule effect are affected due to excessive powder impurities is avoided.

A high-temperature waste recycling type embedded scraper transporter comprises a head portion of the embedded scraper transporter, a tail portion of the embedded scraper transporter and a middle section of the embedded scraper transporter, wherein a precipitating section is arranged on the embedded scraper transporter and provided with multiple overflow ports; a filter and a drainage hole are arranged in the lower portion of the precipitating section; the precipitating section is provided with a space occupying device. The high-temperature waste recycling type embedded scraper transporter not only can ensure cooling of materials, but also does not waste water resources; under the condition that the materials are washed, water resources are not wasted, and the normal conveying requirement of the embedded scraper transporter is met.

The invention relates to a construction technology of a support pile capable of improving corrosion resistance, and belongs to the field of support piles. The support pile comprises a steel reinforcement cage and a concrete mixture poured into the steel reinforcement cage, and the surface of the steel reinforcement cage is coated with corrosion-resistant paint. The corrosion-resistant paint is prepared from the following raw materials in parts by mass: water, ammonium heptamolybdate, 2-amino-5-nitropyridine and benzotriazole. A concrete mixture is prepared from the following raw materials in parts by mass: water, cement, fly ash, fine aggregate, coarse aggregate, sodium methyl silicate and polyphosphate. The construction technology comprises the following steps of material preparation, pile position measurement, hole forming, reinforcement cage hanging and placing, underwater concrete pouring and support pile maintenance. The support pile constructed by the method has excellent corrosion resistance, and the construction process is beneficial for the support pile to form a more compact structure.

The invention provides a deep-buried earth pressure balance shield tunnel-entering double-air-bag sealing device and a sealing method thereof. The deep-buried earth pressure balance shield tunnel-entering double-air-bag sealing device comprises a tunnel ring, at least two high-pressure rubber air bags and a rubber plate; the tunnel ring is fixed to the outer side of a tunnel-entering opening of the shield; the at least two high-pressure rubber air bags are used for filling gaps between the tunnel ring and the shield and between the tunnel ring and a duct piece after being expanded, the at least two high-pressure rubber air bags are arranged in the tunnel ring in parallel in the shield propelling direction, each high-pressure rubber air bag is connected with a medium filling pipeline, and the tunnel ring is provided with a filling channel for the medium filling pipelines to penetrate out; and the rubber plate expands along with the expansion of the high-pressure rubber air bags, the rubber plate is arranged outside the high-pressure rubber air bags in a covering mode, and the two sides of the rubber plate are fixed to the tunnel ring. According to the sealing device, the risk that the surrounding environment is disturbed when the shield enters the tunnel is greatly reduced, and the shield can safely enter the tunnel under the conditions of ultra-deep soil covering and even highconfined water.

The invention relates to the technical field of hydrogen fuel cells, particularly to an integrated hydrogen circulating pump in a fuel cell system. The integrated hydrogen circulating pump comprises ahydrogen circulating pump, wherein a motor driving shaft is arranged in the middle of the hydrogen circulating pump, a spline shaft sleeve is arranged outside the motor driving shaft, a permanent magnet synchronous motor rotor is arranged outside the spline shaft sleeve, a shaft sleeve front section interference fit face is arranged in the middle of the outer portion of the motor driving shaft, aflange face installation screw is arranged on the side, away from the shaft sleeve front section interference fit face, of the outer portion of the motor driving shaft, a bearing is arranged at the position, close to the shaft sleeve front section interference fit face, of the outer portion of the motor driving shaft, an involute internal spline is arranged at the position, close to the flange face installation screw, in the spline shaft sleeve, a rectangular tooth groove is formed in the permanent magnet synchronous motor rotor, a shoulder step is arranged at the position, close to the shaftsleeve front section interference fit face and the middle of the permanent magnet synchronous motor rotor, outside the spline shaft sleeve, a flat square is arranged on the shoulder step. According to the invention, the overall effect is good.

The invention relates to a sealing device, in particular to a vertical non-contact sealing device. The vertical non-contact sealing device comprises an adapter mechanism, and further comprises a firstoil throwing ring, a second oil throwing ring capable of oil leakage and oil throwing, an oil baffle ring capable of leaking oil, an oil throwing ring positioning sleeve used for positioning the oilthrowing ring and a high-speed output end pressing plate; the first oil throwing ring is arranged on a vertical output shaft of the adapter mechanism, the second oil throwing ring is arranged below the first oil throwing ring, the oil baffle ring is arranged below the second oil throwing ring, the oil throwing ring positioning sleeve is arranged below the oil baffle ring, and the high-speed outputend pressing plate is arranged below the oil baffle ring. The vertical non-contact type sealing structure composed of the three oil baffle structures can realize sealing of the high-speed output end,the structure is simple, the oil returning points is more, the oil returning area is large, oil leakage is not easy, and the oil returning device can be used for sealing a high-rotating-speed shaft system.

The invention relates to a novel sealing ring structure for a stop valve. The novel sealing ring structure for the stop valve is provided with a valve body, wherein a valve seat is connected with the left side of the valve body, a back sealing ring is arranged between the valve seat and the valve body for sealing, the back end part of the valve body is provided with a regulating wheel, the regulating wheel is arranged at the right end part of the valve core through a threaded pin and screw threads, a connecting sleeve is arranged on the valve seat arranged at the front end part of the valve body, the connecting sleeve is arranged at the right end part of the valve seat through a combining sleeve, and a front sealing ring is arranged between the connecting sleeve and the combining sleeve for sealing.

The invention provides a double-triangle polytetrafluoroethylene sealing O ring, the cross section of the polytetrafluoroethylene sealing O ring is a quadrangle formed by two isosceles triangles witha common bottom edge, the polytetrafluoroethylene material serving as the sealing O ring has the defect that the material is hard, due to the fact that the texture of a quartz window is brittle, if face sealing is used like a silica gel O ring, needed pressure is quite large, the quartz window can be easily crushed by the force, while two contact ends of the O ring are machined into triangles, thesurface contact is changed into the line contact, the pressure intensity is greatly increased under the same pressure, the window can be sealed without need of large force, and the problem that the window is crushed due to too large pressure is solved.

The invention discloses a mining classification device which comprises a machine body and a discharging opening. The machine body comprises a classification wheel. A second labyrinth ring is mounted above the classification wheel. A first labyrinth ring is mounted above the second labyrinth ring. A gas inlet channel is mounted above the first labyrinth ring. The discharging opening is formed above the gas inlet channel. A variable frequency motor is mounted above the discharging opening. A feeding opening is formed in the left side of an inner barrel. A secondary air inlet device is mounted below the inner barrel and comprises a pore plate. A cover plate is mounted on the right side of the pore plate. A locking device is mounted on the right side of the cover plate. According to the mining classification device, the technical problems about classification precision and sealing between the classification wheel and the machine body are solved; the mining classification device is widely applied to fine classification of solid particles; through the arrangement of an anti-blockage device, the effects that high-precision classification sedimentation can be carried out on ore particles in ore pulp, and the discharging opening is not prone to being blocked by the ore particles are achieved; and the mining classification device is worthy of energetic popularization.

The invention discloses a fuel nozzle processing method and a fuel nozzle, comprising the following steps: processing a nozzle seat with a first oil passage and a second oil passage; the oil inlet end face of the nozzle seat is milled to remove part of the surplus, Then use graphite grinding wheel to grind to remove the remaining margin to obtain the nozzle seat; assemble the swirler and the auxiliary nozzle, and use turning to remove the machining allowance on the oil outlet end face of the assembled swirler and the auxiliary nozzle to obtain the auxiliary nozzle. Nozzle assembly; process the main nozzle and process the stepped surface on the main nozzle for the compression of the nozzle cap into an inverted cone structure, and then assemble the main nozzle and the auxiliary nozzle assembly into a nozzle assembly; cold assemble the nozzle assembly to the inlet of the nozzle seat The assembly is obtained at the end face of the oil end; the nozzle cap is pressed against the inverted cone structure of the main nozzle by external force and threaded with the nozzle seat to obtain the fuel nozzle. According to the processing method of the fuel nozzle of the present invention, the qualified rate of the nozzle sealing test is improved.

The invention discloses a nanometer electromechanical vector hydrophone suitable for deep water. The nanometer electromechanical vector hydrophone further improves the sealing property, the high hydrostatic pressure resistance, the environmental suitability, the reliability and the similar indexes of an MEMS vector hydrophone. The nanometer electromechanical vector hydrophone comprises a stainless steel circuit tube shell, a necking tube shell, a fixed disc and an insulated annular tray, wherein the insulated annular tray is provided with a lug boss, the lug boss is provided with a round PCB board and a detecting chip, the insulated annular tray is formed with a sealing screw hole and a signal screw hole and is firmly connected with an acoustic cap, the acoustic cap is filled with silicon oil and antifoaming agent, and a support frame is arranged in the acoustic cap. The nanometer electromechanical vector hydrophone prevents the acoustic cap from deformation under high pressure and bubbles, enables the acoustic cap to be resistant to high hydrostatic pressure, and improves the environmental suitability, the underwater sound signal testing reliability, practicability, stability and so on. Under the high pressure, the internal pressure and the external pressure of the acoustic cap are balanced so as to bear the high hydrostatic pressure; the hydrostatic pressure resistance test proves that the nanometer electromechanical vector hydrophone is capable of working normally under the hydraulic pressure more than or equal to 20 Mpa.

The invention belongs to a sealing structure, and particularly relates to a standby sealing structure with a low-pressure automatic sealing function. A hard-to-soft reliable sealing structure is adopted for a flashboard and a valve seat, a closed space is formed between double O-shaped rings and the flashboard, and reserve sealing force is provided for sealing of the rear valve seat and the flashboard. By means of the structure, valve leakage caused by model selection, structure defects or unstable pressure can be made up, and reliable sealing of the valve can be achieved through external pressure under the condition that the valve is low in pressure, sealed through pressure or not easy to seal through large caliber (with a wide sealing face).

The present invention provides a comprehensive dust inhibition system, which is used for inhibiting the dust caused by the working of a material breaking system, and comprises: a before-screening drymist injector arranged on a screening machine, and a biological nano-film ejector arranged at the material inlet of a breaking machine. According to the present invention, by arranging different equipment for inhibiting dust according to the characteristics of the dust during the material breaking, the dust during the whole material breaking can be effectively inhibited.

The invention discloses a water entry type portable oxygen generator which comprises an oxygen generation structure and a battery. The oxygen generation structure comprises an air pump and a non-return water stop device, the non-return water stop device is connected with the air outlet end of the air pump, the water entry type portable oxygen generator further comprises a waterproof shell, a floatswitch and a water blocking filter, and the float switch is electrically connected with the air pump and controls the air pump to work; and the battery is electrically connected with the air pump andsupplies power to the air pump, an oxygen generation structure, the battery and the float switch are installed in the waterproof shell, the waterproof shell is of an integrated structure formed by pouring a sealing material, and the water blocking filter is located outside the waterproof shell and communicated with an air inlet of the air pump. Through the design, the waterproof shell enables theinterior of the water entry type portable oxygen generator to be sealed and not prone to water inflow; the non-return water stop device and the water blocking filter are used for preventing externalwater from entering the water entry type portable oxygen generator through the air inlet and an air outlet; and once the float switch enables the water entry type portable oxygen generator to enter water, the air pump starts to work.

A gas regulating valve, comprising a valve body, a valve stem, a valve core and a driving device, the valve body is provided with a valve cavity, an air intake channel, an inner ring outlet channel and an outer ring outlet channel; the valve stem is linked with the valve core, and the valve core can It is movable in the valve cavity of the valve body and can adjust the flow of the inner ring outlet channel and the outer ring outlet channel; the driving device is provided with an output shaft, which is connected with the valve stem to drive the valve core to move axially in the valve cavity , further comprising a first compression spring and a second compression spring, the elastic coefficient of the second compression spring is greater than that of the first compression spring. By setting the first compression spring, the valve stem and the valve core are softly connected. Compared with the prior art, the excess stroke of the output shaft of the drive mechanism is used to squeeze the valve core to form a seal. In the present invention, the first compression spring and the action of the second compression spring to form a seal, the damage to the valve core by the first compression spring is small, so that the seal is not easily affected by the damage of the valve core, and the safety is high.

The invention discloses a large-current electromagnetic switch to solve the technical problems that an existing device is inaccurate in sampling, complex in structure and insufficient in sealing performance. The large-current electromagnetic switch comprises a shell, a coil, a contact and a binding post, the binding post is arranged at the top of the shell and comprises an exposed part located outside the shell and an embedded part located in the shell, the coil and the contact are arranged in the shell, the contact corresponds to the embedded part of the binding post, and the coil is used for attracting the contact to enable the contact to be separated from the binding post. The large-current electromagnetic switch further comprises an isolation bin, a control panel and a sensor assembly, the isolation bin is arranged on the side face of the shell, the control panel is arranged in the isolation bin, the sensor assembly is installed in the shell, and a connecting wire of the sensor assembly penetrates through the side face of the shell to be connected to the control panel. The large-current electromagnetic switch has the advantages of being compact in structure, high in sealing performance, accurate in detection data and high in environment adaptability.

The invention discloses a collector plate of a fuel cell. The collector plate of the fuel cell comprises a substrate plate, wherein the substrate plate is a nonmetallic substrate plate; one lateral surface of the substrate plate is coated with a coating layer, and the other lateral surface of the substrate plate is provided with a metal foil layer; the surface of the metal foil layer is coated with a gold coated layer. The collector plate of the fuel cell, which is provided by the invention, has the functions of electric conduction, insulation, sealing, shock absorption, back pressure, heat radiation and the like, and has a wide market prospect.