An integrated bottle valve suitable for 70MPa high-pressure hydrogen

Abstract

The present invention discloses an integrated bottle valve suitable for 70MPa high-pressure hydrogen, and relates to the technical field of integrated bottle valves for high-pressure hydrogen, wherein a main channel, a branch channel 1 and a branch channel 2 which are connected in sequence are provided in the bottle valve body, a manual stop valve is arranged in the main channel, and the manual stop valve is used to control the connection state between the main channel and the branch channel 1; a solenoid valve main valve is arranged in the branch channel 1, and the solenoid valve main valve is used to control the connection state of the branch channel 1; a pilot solenoid valve is connected to the solenoid valve main valve through a gas pipeline, and the gas pipeline is connected in parallel with the branch channel 1, and a filter overflow valve is arranged in the branch channel 2; a TPRD discharge device is arranged on the top of the bottle valve body, and the TPRD discharge device is arranged in a discharge channel which runs through the bottle valve body. The integrated bottle valve suitable for 70MPa high-pressure hydrogen of the present invention is a miniaturized and highly integrated solenoid bottle valve, which has multifunctionality, can reduce the cost of the whole vehicle, and reduce the leakage points increased due to the independence of the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of high-pressure hydrogen integrated bottle valves, and in particular to a high-pressure hydrogen integrated bottle valve suitable for 70MPa. Background Art

[0002] The development of new energy sources is urgent in today's world. The reason is that the energy used, such as oil, natural gas, coal, and LPG, are non-renewable resources with limited reserves on the earth. However, human survival is inseparable from energy, so new energy sources must be found. Hydrogen energy is a recognized clean energy and has become one of the key industries invested by various countries.

[0003] my country has made major breakthroughs in the research and development of hydrogen-powered vehicles and has successfully developed a performance prototype of a hydrogen fuel cell vehicle. Hydrogen-powered vehicles use high-pressure hydrogen storage cylinders to store hydrogen. The hydrogen storage cylinders are small in size and have the risk of explosion. High-pressure hydrogen integrated bottle valves are installed on the hydrogen storage cylinders of fuel cell vehicles to control the opening and closing of hydrogen in the hydrogen storage cylinders. As a key component of the hydrogen storage system, it closely affects the safety and stability of the hydrogen storage system.

[0004] Considering the safety, lightness, low cost and leakage reduction of hydrogen fuel cell vehicles, the more functions the vehicle bottle valve has, the fewer valves and pipes are needed for the front-end pipeline of the fuel cell. Highly integrated bottle valves are the best solution for the whole vehicle.

[0005] Currently, there are only 35MPa high-pressure hydrogen integrated bottle valves, and their functions are not perfect enough to meet the use requirements of 70MPa fuel cell vehicles. The 70MPa high-pressure hydrogen medium has a great test on the sealing performance, safety and reliability of the integrated bottle valve, and has high requirements for structural design. At present, there is still a lack of an integrated bottle valve with high integration, complete functions and strong performance. Summary of the invention

[0006] In view of the above-mentioned problems, the purpose of the present invention is to provide a 70MPa high-pressure hydrogen integrated bottle valve, which improves the working pressure, optimizes its functionality, and can meet the use requirements of 70MPa fuel cell vehicles.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A 70MPa high-pressure hydrogen integrated bottle valve, comprising a bottle valve body, a manual stop valve and a pilot solenoid valve respectively installed on the top of the bottle valve body, a solenoid valve main valve and a filter overflow valve respectively installed at the bottom of the bottle valve body, the manual stop valve, the solenoid valve main valve, and the filter overflow valve are sequentially connected in the bottle valve body, wherein the bottle valve body is provided with a main channel, a branch channel 1 and a branch channel 2 which are sequentially connected, the manual stop valve is arranged in the main channel, and the manual stop valve is used to control the connection state between the main channel and the branch channel 1; the solenoid valve main valve is arranged in the branch channel 1, and the solenoid valve main valve is used to control the connection state of the branch channel 1, the pilot solenoid valve is connected to the solenoid valve main valve through a gas pipeline, the gas pipeline is connected in parallel with the branch channel 1, and the filter overflow valve is arranged in the branch channel 2; a TPRD discharge device is provided on the top of the bottle valve body, and the TPRD discharge device is arranged in a discharge channel running through the bottle valve body.

[0009] The above-mentioned one is suitable for a 70MPa high-pressure hydrogen integrated bottle valve, wherein the manual stop valve includes: a valve cover, which is threadedly connected to the main channel; a valve stem, which is threadedly connected to the valve cover; a valve flap, the upper end of the valve flap is inserted into the valve stem, the valve flap is connected to the valve stem by a retaining spring, and a rubber sleeve is arranged between the valve flap and the bottle valve body.

[0010] The above-mentioned one is suitable for a 70MPa high-pressure hydrogen integrated bottle valve, wherein the pilot solenoid valve comprises: a pilot nozzle, a gas channel 1 is arranged in the pilot nozzle, and the lower end of the gas channel 1 is connected to the main channel; a sealing mechanism, the sealing mechanism comprises a solenoid valve static iron core, a spring 1 and a pilot sealing plug, the upper end of the spring 1 is connected to the solenoid valve static iron core, the lower end of the spring 1 is connected to the pilot sealing plug, the spring 1 is used to constantly provide thrust to the pilot sealing plug, the pilot sealing plug is used to seal the gas channel 1, and the upper end of the gas channel 1 is connected to one end of the gas pipeline; an unsealing mechanism, the unsealing mechanism is used to provide a pulling force to the pilot sealing plug, and the direction of the pulling force is opposite to the direction of the thrust.

[0011] The above-mentioned one is suitable for a 70MPa high-pressure hydrogen integrated bottle valve, wherein the unsealing mechanism comprises: an outer shell, the outer shell comprises an upper magnetic end cap, a magnetic shell and a lower magnetic end cap, the upper magnetic end cap and the lower magnetic end cap are respectively arranged at the upper and lower ends of the magnetic shell; a coil, the coil is fixed in the outer shell, and a cylindrical cavity is formed inside the coil; a sealed shell, the upper end of the sealed shell passes through the lower magnetic end cap and extends to the inside of the cylindrical cavity, a cylindrical channel is formed inside the sealed shell, and the central axis of the cylindrical channel coincides with the central axis of the gas channel one; a solenoid valve moving iron core, the solenoid valve moving iron core is arranged in the cylindrical channel, the pilot sealing plug is threadedly connected to the lower end of the solenoid valve moving iron core, and the upper end of the spring one passes through the inner hole of the solenoid valve moving iron core and is connected to the solenoid valve static iron core.

[0012] The above-mentioned one is suitable for 70MPa high-pressure hydrogen integrated bottle valve, wherein the solenoid valve main valve comprises: a sealing valve seat, the sealing valve seat is threadedly connected to the bottle valve body, and a gas channel 2 is arranged inside, and the gas channel 2 is communicated with the branch channel 1; a sealing cover, the sealing cover is threadedly connected to one side of the bottom of the bottle valve body, a spring limiting groove is provided on the sealing cover, and a spring 2 is fixed in the spring limiting groove; a sealing valve flap, the sealing valve flap is arranged between the sealing valve seat and the sealing cover, one end of the spring 2 away from the sealing cover is fixedly connected to the sealing valve flap, and the end of the sealing valve flap close to the sealing valve seat is provided with a semi-spherical structure, the semi-spherical structure forms a seal with the outlet of the gas channel 2, one end of the gas pipeline away from the pilot solenoid valve is located on one side of the semi-spherical structure, and one end of the branch channel 2 is located on the other side of the semi-spherical structure.

[0013] The above-mentioned one is suitable for 70MPa high-pressure hydrogen integrated bottle valve, wherein the filtering overflow valve comprises: an overflow valve, including an overflow valve body, a vent pipe, a valve core, a spring three and an overflow valve cover, the overflow valve body is arranged in the bottle valve body, the vent pipe and the overflow valve cover are respectively arranged at both ends of the overflow valve body, the valve core is arranged in the chamber of the overflow valve body, a gas channel three is arranged in the chamber of the overflow valve body, the gas channel three is located between the valve core and the vent pipe, a sealing plug is provided at one end of the valve core close to the gas channel three, which is used to seal the gas channel three, a gas channel four is formed inside the valve core, a through hole is opened on the side wall of the valve core, and the spring three is set on the valve core; a 10μm filter, including a nozzle and a filter screen, the nozzle is threadedly connected to the end of the overflow valve cover away from the valve core, the filter screen is clamped between the nozzle and the overflow valve cover, and a gas channel five is opened in the nozzle.

[0014] The above-mentioned one is suitable for a 70MPa high-pressure hydrogen integrated bottle valve, wherein the TPRD discharge device comprises: a TPRD valve body, the TPRD valve body is arranged in the bottle valve body, the interior of the TPRD valve body is provided with a receiving cavity with an upper opening, the bottom of the receiving cavity is downwardly provided with a gas channel 6 connected to the outside; a thrombolytic cap, the thrombolytic cap is threadedly connected to the upper part of the receiving cavity, the lower end of the thrombolytic cap is provided with an alloy receiving cavity, and a fusible alloy is cast in the alloy receiving cavity; a thermal conductive cap, the thermal conductive cap is arranged in the receiving cavity, and the upper end of the thermal conductive cap is inserted into In the alloy accommodating cavity, the upper end surface of the thermally conductive cap is against the lower end surface of the fusible alloy, and a guide hole is provided in the middle of the lower end surface of the thermally conductive cap; a pressure-bearing rod, the upper end of the pressure-bearing rod is inserted into the guide hole, a disc spring is provided between the pressure-bearing rod and the thermally conductive cap, one end of the disc spring is connected to the thermally conductive cap, and the other end is connected to the pressure-bearing rod, and a mounting groove is provided at the bottom of the pressure-bearing rod; a sealing cone head, the upper end of the sealing cone head is embedded in the mounting groove, the lower end of the sealing cone head is in the shape of an inverted cone, and a seal is formed between the sealing cone head and the gas channel six.

[0015] The above-mentioned one is suitable for a 70MPa high-pressure hydrogen integrated bottle valve, wherein a gas discharge port is opened on the side wall of the TPRD valve body, and the gas discharge port penetrates the side wall of the TPRD valve body and is connected with the accommodating cavity.

[0016] Due to the adoption of the above technology, the present invention has the following positive effects compared with the prior art:

[0017] The integrated bottle valve for 70MPa high-pressure hydrogen of the present invention is a miniaturized and highly integrated electromagnetic bottle valve, which can be used as a bottle valve for 70MPa ultra-high-pressure hydrogen medium of passenger cars. It has multifunctionality, can reduce the cost of the whole vehicle, and reduces the leakage points increased due to the independence of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the integrated bottle valve for 70MPa high-pressure hydrogen according to the present invention;

[0019] Figure 2 It is a top view of the integrated bottle valve for 70MPa high-pressure hydrogen of the present invention;

[0020] Figure 3 It is a schematic diagram of a bottle valve body suitable for a 70MPa high-pressure hydrogen integrated bottle valve of the present invention;

[0021] Figure 4 It is a cross-sectional view of a manual stop valve applicable to a 70MPa high-pressure hydrogen integrated bottle valve of the present invention;

[0022] Figure 5 It is a cross-sectional view of a pilot-operated solenoid valve applicable to a 70MPa high-pressure hydrogen integrated bottle valve of the present invention;

[0023] Figure 6 It is a schematic diagram of the installation structure of the pilot solenoid valve and the bottle valve body of the present invention;

[0024] Figure 7 It is a cross-sectional view of the solenoid valve main valve applicable to the 70MPa high-pressure hydrogen integrated bottle valve of the present invention;

[0025] Figure 8 It is a schematic diagram of the installation structure of the solenoid valve main valve and the bottle valve body of the present invention;

[0026] Fig. 9 It is a cross-sectional view of a filter overflow valve applicable to a 70MPa high-pressure hydrogen integrated bottle valve of the present invention;

[0027] Fig.10 It is a cross-sectional view of the TPRD discharge device of the present invention applicable to the 70MPa high-pressure hydrogen integrated bottle valve;

[0028] Fig.11 It is a schematic diagram of the installation structure of the TPRD discharge device and the bottle valve body of the present invention.

[0029] In the attached drawings: 1. Valve body; 11. Main channel; 111. Inlet end; 112. Outlet end; 12. Branch channel 1; 13. Branch channel 2; 14. Drain port; 2. Manual stop valve; 21. Valve cover; 22. Valve stem; 221. O-ring; 222. Conical surface structure; 223. Hexagonal bolt; 23. Valve disc; 231. Sealing plug; 24. Circlip; 25. Rubber sleeve; 3. Pilot solenoid valve; 31. Pilot nozzle; 3 11. Gas channel 1; 32. Blocking mechanism; 321. Electromagnetic valve static iron core; 322. Spring 1; 323. Pilot sealing plug; 33. Unblocking mechanism; 3311. Upper magnetic end cover; 3312. Magnetic housing; 3313. Lower magnetic end cover; 332. Coil; 333. Sealing housing; 334. Electromagnetic valve moving iron core; 34. Electromagnetic valve housing; 35. Electrical connector; 4. Electromagnetic valve main valve; 41. Sealing valve seat; 411. Gas channel Channel 2; 412, annular block; 42, sealing cover; 421, spring limit groove; 43, spring 2; 44, sealing valve disc; 441, semi-spherical structure; 442, blind hole; 5, filter overflow valve; 51, overflow valve; 511, overflow valve body; 5111, gas channel 3; 512, vent pipe; 513, valve core; 5131, sealing plug; 5132, gas channel 4; 5133, through hole; 514, spring 3; 515, Overflow valve cover; 52, 10μm filter; 521, nozzle; 5211, gas channel five; 522, filter; 6, TPRD discharge device; 61, TPRD valve body; 611, gas channel six; 612, gas discharge port; 62, thrombolytic cap; 63, fusible alloy; 64, thermal conductive cap; 65, pressure rod; 66, disc spring; 67, sealing cone head; 68, discharge channel; 7, temperature sensor; 8, one-way discharge valve 8. DETAILED DESCRIPTION

[0030] The object of the present invention is to provide a 70MPa high-pressure hydrogen integrated bottle valve for installation on a hydrogen storage bottle of a fuel cell vehicle. The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to be a limitation of the present invention.

[0031] See also Figure 1 , Figure 2 and Figure 3As shown, a first preferred integrated bottle valve suitable for 70MPa high-pressure hydrogen is shown, including a bottle valve body 1, a manual stop valve 2 and a pilot solenoid valve 3 respectively installed on the top of the bottle valve body 1, a solenoid valve main valve 4 and a filter overflow valve 5 respectively installed at the bottom of the bottle valve body 1, the manual stop valve 2, the solenoid valve main valve 4, and the filter overflow valve 5 are sequentially connected in the bottle valve body 1, wherein the bottle valve body 1 is provided with a main channel 11, a branch channel 12 and a branch channel 2 13 which are sequentially connected, one end of the main channel 11 is an inlet end 111, and the other end of the main channel 11 is an outlet end 112, and both the inlet end 111 and the outlet end 112 are connected to the high-pressure pipeline of the vehicle-mounted hydrogen supply system.

[0032] Furthermore, a manual stop valve 2 is arranged in the main channel 11, and the manual stop valve 2 is used to control the connection state between the main channel 11 and the branch channel 1 12. The manual stop valve 2 is in a normally open state during normal operation. During maintenance and emergency, the user manually closes the manual stop valve 2, so that the main channel 11 and the branch channel 1 12 are both in a sealed state, and the high-pressure hydrogen will not enter or flow out of the bottle valve body 1;

[0033] Also, see Figure 2 and Figure 8 As shown, the solenoid valve main valve 4 is arranged in the branch channel 12, and the solenoid valve main valve 4 is used to control the connectivity state of the branch channel 12. The pilot solenoid valve 3 is connected to the solenoid valve main valve 4 through a gas pipeline (not shown in the figure), and the gas pipeline is connected in parallel with the branch channel 12. The pilot solenoid valve 3 is normally closed. When the pilot solenoid valve 3 is energized, hydrogen flows in the gas pipeline, and a pressure difference is formed before and after the sealing valve disc 44 in the solenoid valve main valve 4, which can open the solenoid valve main valve 4 to release the hydrogen in the hydrogen storage cylinder.

[0034] The filter overflow valve 5 is disposed in the second branch channel 13 . When the hydrogen flow rate of the second branch channel 13 is too large, the filter overflow valve 5 seals the second branch channel 13 .

[0035] In addition, as a preferred embodiment, please continue to refer to Figure 2 and Fig.11As shown, the integrated bottle valve suitable for 70MPa high-pressure hydrogen also includes: a TPRD discharge device 6, which is arranged in a discharge channel 68 that penetrates the bottle valve body 1, and the discharge channel 68 is connected to the interior of the hydrogen storage bottle. A discharge port 14 is provided on the upper part of the bottle valve body 1 close to the side wall of the TPRD discharge device 6, and the discharge port 14 and the TPRD discharge device 6 are used to vent the gas in the hydrogen storage bottle; in normal operation, the TPRD discharge device 6 is in a closed state, and the hydrogen in the hydrogen storage bottle will not leak out; when an abnormal condition such as a fire occurs, the thermal sensitive mechanism in the TPRD discharge device 6 will be activated to open the discharge channel 68, and the hydrogen in the gas cylinder will be released from the discharge port 14.

[0036] Further, as a preferred embodiment, see Figure 2 As shown, the integrated bottle valve suitable for 70MPa high-pressure hydrogen also includes: a temperature sensor 7, which is arranged in the bottle valve body 1 and is used to collect the temperature in the hydrogen storage bottle. The temperature sensor 7 is connected to the vehicle control system signal and feeds back the temperature value in the hydrogen storage bottle to the vehicle control system in real time.

[0037] Furthermore, as a preferred embodiment, the 70MPa high-pressure hydrogen integrated bottle valve also includes: a one-way discharge valve 8, which is located below the pilot solenoid valve 3, and connects the inside and outside of the hydrogen storage bottle. In normal operation, the one-way discharge valve 8 plays a sealing role. When the pilot solenoid valve 3 fails, the one-way valve disc in the one-way discharge valve 8 is opened by a special tool (not shown in the figure) to release the hydrogen storage bottle, which can also prevent daily misoperation. When the car is refilled with hydrogen, the high-pressure hydrogen enters the hydrogen storage bottle through the inlet end 111, the manual stop valve 2, the solenoid valve main valve 4 and the filter overflow valve 5 in sequence; when the pilot solenoid valve 3 is opened, the hydrogen in the hydrogen storage bottle enters the hydrogen system pipeline through the filter overflow valve 5, the solenoid valve main valve 4, the manual stop valve 2 and the outlet end 112 in sequence, and finally to the fuel cell.

[0038] The various components of the present invention are described in detail below:

[0039] Manual stop valve 2:

[0040] Also, as a preferred embodiment, please continue to refer to Figure 1 and Figure 4 As shown, the manual stop valve 2 includes: a valve cover 21, the valve cover 21 is threadedly connected to the main channel 11 of the bottle valve body 1, and a valve stem installation channel is provided inside the valve cover 21.

[0041] Further, as a preferred embodiment, the manual stop valve 2 also includes: a valve stem 22, the valve stem 22 is threadedly connected to the valve stem installation channel, both ends of the valve stem 22 protrude from the valve stem installation channel, and the lower end of the valve stem 22 is provided with a valve disc installation channel.

[0042] Furthermore, as a preferred embodiment, the manual stop valve 2 also includes: a valve flap 23, the upper end of the valve flap 23 is inserted into the valve flap installation channel, the valve flap 23 is connected to the valve stem 22 by a retaining spring 24, so that the valve flap 23 will not fall off, a rubber sleeve 25 is arranged between the valve flap 23 and the bottle valve body 1, an O-ring 221 is arranged between the valve cover 21 and the valve stem 22, and the valve stem 22 drives the valve flap 23 to move up and down through the retaining spring 24. The advantage of using the retaining spring 24 is that a larger gap can be left between the valve stem 22 and the valve flap 23, and the rubber sleeve 25 can be automatically located in the center of the main channel 11, thereby improving the sealing reliability and reducing the manufacturing cost.

[0043] Furthermore, as a preferred embodiment, an inner conical surface is provided on the inner wall of the valve cover 21, and an outer conical surface is provided on the outer wall of the valve stem 22. The inner conical surface and the outer conical surface form a conical surface structure 222. When the manual stop valve 2 is in an open state, a metal hard seal is achieved between the valve stem 22 and the valve cover 21 through the conical surface structure 222, thereby increasing the reliability of the seal. When the seal of the rubber sleeve 25 fails, a second seal can be achieved through the O-ring 221 and the conical surface structure 222, thereby improving the overall sealing reliability.

[0044] Furthermore, as a preferred embodiment, the upper end of the valve stem 22 protrudes from the valve cover 21, and an external hexagonal bolt 223 is fixed to the upper end of the valve stem 22, which is convenient for the user to rotate the valve stem 22. The valve cover 21 and the valve stem 22 are threadedly matched, which can limit the valve stem 22 and prevent the valve stem 22 from being screwed out.

[0045] In addition, as a preferred embodiment, a sealing plug 231 is provided at the lower end of the valve flap 23 , and when the manual stop valve 2 is in a closed state, the sealing plug 231 blocks the main channel 11 .

[0046] Pilot operated solenoid valve 3:

[0047] In addition, as a preferred embodiment, please continue to refer to Figure 3 , Figure 5 and Figure 6 As shown, the pilot solenoid valve 3 includes: a pilot nozzle 31, the pilot nozzle 31 is threadedly connected to the bottle valve body 1, a gas channel 311 is arranged in the pilot nozzle 31, and the lower end of the gas channel 311 is connected to the main channel 11.

[0048] In addition, as a preferred embodiment, the pilot solenoid valve 3 also includes: a sealing mechanism 32, the sealing mechanism 32 includes a solenoid valve static iron core 321, a spring 322 and a pilot sealing plug 323, the upper end of the spring 322 is connected to the solenoid valve static iron core 321, the lower end of the spring 322 is connected to the pilot sealing plug 323, the spring 322 is used to provide constant thrust to the pilot sealing plug 323, the shape of the end of the pilot sealing plug 323 close to the gas channel 311 matches the shape of the port of the gas channel 311, the pilot sealing plug 323 fits the port of the gas channel 311, and the pilot sealing plug 323 is used to seal the gas channel 311.

[0049] Furthermore, as a preferred embodiment, the pilot solenoid valve 3 also includes: an unsealing mechanism 33, which is used to provide a pulling force to the pilot sealing plug 323, and the direction of the pulling force is opposite to the direction of the thrust. When the gas path in the gas channel 311 needs to flow, the unsealing mechanism 33 provides a pulling force to the pilot sealing plug 323, driving the pilot sealing plug 323 to move upward, and the pilot sealing plug 323 compresses the spring 322. When the gas path flow in the gas channel 311 needs to be cut off, the unsealing mechanism 33 stops applying the pulling force to the pilot sealing plug 323, and the pilot sealing plug 323 moves downward under the thrust of the spring 322 to continue to seal the gas channel 311.

[0050] Further, as a preferred embodiment, the unsealing mechanism 33 includes: an outer shell, a coil 332, a sealed shell 333 and an electromagnetic valve moving iron core 334, the outer shell includes an upper magnetic end cover 3311, a magnetic shell 3312 and a lower magnetic end cover 3313, the upper magnetic end cover 3311 and the lower magnetic end cover 3313 are respectively arranged at the upper and lower ends of the magnetic shell 3312; the coil 332 is fixed in the outer shell, and a cylindrical cavity is formed inside the coil 332; the upper end of the sealed shell 333 passes through the lower magnetic end cover 3313 and extends to the inside of the cylindrical cavity, and a cylindrical channel is formed inside the sealed shell 333; the electromagnetic valve moving iron core 334 is arranged in the cylindrical channel, and the electromagnetic valve moving iron core 334 moves linearly along the central axis of the cylindrical channel, and the pilot sealing plug 323 is threadedly connected to The lower end of the solenoid valve moving iron core 334 and the upper end of the spring 1 322 pass through the inner hole of the solenoid valve moving iron core 334 and are connected to the solenoid valve static iron core 321. The central axis of the cylindrical channel coincides with the central axis of the gas channel 1 311, and the pilot sealing plug 323 is directly opposite to the gas channel 1 311. When the coil 332 is energized, the magnetic force generated drives the solenoid valve moving iron core 334 to move upward in the sealing shell 333, and the solenoid valve moving iron core 334 drives the pilot sealing plug 323 to move upward and compress the spring 1 322. The pilot sealing plug 323 is separated from the gas channel 1 311, so that the gas path of the gas channel 1 311 is open. When the coil 332 is not energized, the pilot sealing plug 323 moves downward under the action of the spring 1 322 to reseal the gas channel 1 311.

[0051] Furthermore, as a preferred embodiment, a solenoid valve housing 34 is provided at the upper end of the housing, an electrical connector 35 is fixed on the solenoid valve housing 34, the electrical connector 35 is electrically connected to the coil 332, the solenoid valve static iron core 321 is provided in the cylindrical channel, and the upper end of the solenoid valve static iron core 321 passes through the upper magnetic end cover 3311 and is threadedly connected to the solenoid valve housing 34.

[0052] Solenoid valve main valve 4:

[0053] Also, as a preferred embodiment, please continue to refer to Figure 1 , Figure 7 and Figure 8 As shown, the solenoid valve main valve 4 includes: a sealing valve seat 41, which is threadedly connected to the branch channel 12 of the bottle valve body 1, and a gas channel 2 411 is arranged inside the sealing valve seat 41, and the gas channel 2 411 is connected to the branch channel 12.

[0054] Further, as a preferred embodiment, the solenoid valve main valve 4 also includes: a sealing cover 42, which is threadedly connected to one side of the bottom of the bottle valve body 1, and a spring limiting groove 421 is opened on the sealing cover 42, and a spring 43 is fixed in the spring limiting groove 421.

[0055] Furthermore, as a preferred embodiment, the sealing valve flap 44 is arranged between the sealing valve seat 41 and the sealing cover 42, the end of the spring 2 43 away from the sealing cover 42 is fixedly connected to the sealing valve flap 44, and the end of the sealing valve flap 44 close to the sealing valve seat 41 is provided with a semi-spherical structure 441, the semi-spherical structure 441 forms a seal with the outlet of the gas channel 2 411, the end of the gas pipeline away from the pilot solenoid valve 3 is located on one side of the semi-spherical structure 441, and the end of the branch channel 2 13 is located on the other side of the semi-spherical structure 441. When the pilot solenoid valve 3 is energized, since the branch channel 12 and the gas pipeline are connected in parallel, a pressure difference is formed on both sides of the sealing valve flap 44, and the sealing valve flap 44 moves in the direction away from the sealing valve seat 41 under pressure, and the solenoid valve main valve 4 opens.

[0056] Furthermore, as a preferred embodiment, when the hydrogen storage cylinder is filled with hydrogen, hydrogen flows from branch channel 112 to gas channel 2 411, and the semi-spherical structure 441 and the sealing valve flap 44 are pushed by the medium force. The sealing valve flap 44 compresses the spring 2 43, and the semi-spherical structure 441 is separated from the gas channel 2 411. Hydrogen can enter branch channel 2 13 through gas channel 2 411. When the filling is completed, the semi-spherical structure 441 and the sealing valve flap 44 are reset under the action of the spring 2 43, and the spring 2 43 returns to its original length. The semi-spherical structure 441 blocks the gas channel 2 411 again, and the hydrogen backflow in the branch channel 2 13 is prevented.

[0057] Furthermore, as a preferred embodiment, a blind hole 442 is formed on one end surface of the sealing valve flap 44 close to the sealing cover 42 , and one end of the spring 43 away from the sealing cover 42 is inserted into the blind hole 442 to limit the spring 43 .

[0058] Moreover, as a preferred embodiment, the sealing valve seat 41 extends outward at one end close to the semi-spherical structure 441 to form an annular clamping block 412, and the annular clamping block 412 is clamped on the clamping groove in the bottle valve body 1. A plurality of mounting holes are provided on the annular clamping block 412, and the annular clamping block 412 can be mounted on the bottle valve body 1 by screws.

[0059] Filter relief valve 5:

[0060] Also, as a preferred embodiment, please continue to refer to Figure 8 and Fig. 9As shown, the filter overflow valve 5 includes: an overflow valve 51, including an overflow valve body 511, a venting pipe 512, a valve core 513, a spring 514 and an overflow valve cover 515. The overflow valve body 511 is arranged in the bottle valve body 1, the venting pipe 512 and the overflow valve cover 515 are respectively threadedly connected to the two ends of the overflow valve body 511, the valve core 513 is movably arranged in the chamber of the overflow valve body 511, and a gas channel is arranged in the chamber of the overflow valve body 511. Three 5111, the gas channel three 5111 is located between the valve core 513 and the vent pipe 512, and a sealing plug 5131 is provided at one end of the valve core 513 close to the gas channel three 5111, for sealing the gas channel three 5111, a gas channel four 5132 is formed inside the valve core 513, and a through hole 5133 is opened on the side wall of the valve core 513 along its radial direction, and the through hole 5133 is connected with the gas channel four 5132, and a spring three 514 is sleeved on the valve core 513.

[0061] In addition, as a preferred embodiment, the filtering overflow valve 5 also includes: a 10μm filter 52, including a nozzle 521 and a filter screen 522, the nozzle 521 is threadedly connected to the end of the overflow valve cover 515 away from the valve core 513, the filter screen 522 is clamped between the nozzle 521 and the overflow valve cover 515, and a gas channel five 5211 is opened in the nozzle 521. When the hydrogen flow rate flowing through the overflow valve 51 is too large, the hydrogen pushes the valve core 513 to move in the direction of the gas channel three 5111. At the same time, the valve core 513 compresses the spring three 514, and the sealing plug 5131 of the valve core 513 seals the gas channel three 5111, and the hydrogen flowing through the overflow valve 51 is cut off to avoid hydrogen leakage, thereby enhancing the safety of the hydrogen storage cylinder.

[0062] Further, as a preferred embodiment, an annular step one is provided on the outer side wall of the valve core 513 at one end close to the overflow valve cover 515, an annular step two is provided in the chamber of the overflow valve body 511 close to the overflow valve cover 515, annular step two is located between annular step one and gas channel three 5111, annular step one and annular step two are directly opposite to each other, the valve core 513, annular step one, the overflow valve body 511 and annular step two together form a closed cavity, spring three 514 is provided in the cavity, one end of the spring three 514 abuts against annular step one, and the other end of the spring three 514 abuts against annular step two.

[0063] TPRD relief device 6:

[0064] Also, as a preferred embodiment, please continue to refer to Figure 2 , Fig.10 and Fig.11As shown, the TPRD discharge device 6 includes: a TPRD valve body 61, which is arranged in the bottle valve body 1, and the interior of the TPRD valve body 61 is provided with a receiving cavity with an upper opening, and the bottom of the receiving cavity is downwardly provided with a gas channel 611 connected to the outside.

[0065] In addition, as a preferred embodiment, the TPRD discharge device 6 also includes: a thrombolytic cap 62, which is threadedly connected to the upper part of the accommodating chamber, and an alloy accommodating chamber is opened at the lower end of the thrombolytic cap 62, in which a fusible alloy 63 is cast.

[0066] Furthermore, as a preferred embodiment, the TPRD discharge device 6 also includes: a thermally conductive cap 64, which is arranged in the accommodating cavity, the upper end of the thermally conductive cap 64 is inserted into the alloy accommodating cavity, the upper end surface of the thermally conductive cap 64 is against the lower end surface of the fusible alloy 63, and a guide hole is opened in the middle of the lower end surface of the thermally conductive cap 64.

[0067] Further, as a preferred embodiment, the TPRD discharge device 6 also includes: a pressure-bearing rod 65, the upper end of the pressure-bearing rod 65 is inserted into the guide hole, a disc spring 66 is arranged between the pressure-bearing rod 65 and the thermal cap 64, one end of the disc spring 66 is connected to the thermal cap 64, and the other end is connected to the pressure-bearing rod 65, and a mounting groove is provided at the bottom of the pressure-bearing rod 65.

[0068] Furthermore, as a preferred embodiment, the TPRD discharge device 6 also includes: a sealing cone head 67, the upper end of the sealing cone head 67 is embedded in the mounting groove, the lower end of the sealing cone head 67 is in the shape of an inverted cone, and a seal is formed between the sealing cone head 67 and the gas channel six 611.

[0069] Furthermore, as a preferred embodiment, a gas discharge port 612 communicating with the outside is opened on the side wall of the TPRD valve body 61, and the gas discharge port 612 penetrates the side wall of the TPRD valve body 61 and communicates with the accommodating cavity.

[0070] In addition, as a preferred embodiment, an alloy discharge hole is opened on the thrombolytic cap 62, and the alloy discharge hole is connected with the alloy containing cavity, so that the melted fusible alloy 63 can flow out faster, and the discharge speed after overheating is accelerated. When the fusible alloy 63 reaches the melting temperature, the thermal conductive cap 64 squeezes the fusible alloy 63 under the action of the disc spring 66 so that it flows out of the thrombolytic cap 62, and the thermal conductive cap 64, the pressure-bearing rod 65 and the sealing cone head 67 all move upward under the action of the hydrogen pressure in the gas channel six 611, and the thermal conductive cap 64 is pushed into the alloy containing cavity, and the sealing cone head 67 is away from the gas channel six 611, so that the gas in the hydrogen storage cylinder is discharged from the gas channel six 611, the gas discharge port 612 and the discharge port 14 in turn.

[0071] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated bottle valve for 70MPa high-pressure hydrogen, comprising a bottle valve body, a manual stop valve and a pilot solenoid valve respectively installed on the top of the bottle valve body, a solenoid valve main valve and a filter overflow valve respectively installed at the bottom of the bottle valve body, the manual stop valve, the solenoid valve main valve, and the filter overflow valve are sequentially connected in the bottle valve body, It is characterized in that in: The bottle valve body is provided with a main channel, a branch channel 1 and a branch channel 2 which are connected in sequence, and the manual stop valve is arranged in the main channel, and the manual stop valve is used to control the connection state between the main channel and the branch channel 1; The manual stop valve comprises: A valve cover, the valve cover being threadedly connected in the main passage; a valve stem, the valve stem being threadedly connected in the valve cover; A valve flap, the upper end of which is inserted into the valve stem, the valve flap is connected to the valve stem via a retaining spring, and a rubber sleeve is provided between the valve flap and the bottle valve body; The solenoid valve main valve is arranged in the branch channel 1, and the solenoid valve main valve is used to control the connection state of the branch channel 1. The pilot solenoid valve is connected to the solenoid valve main valve through a gas pipeline, and the gas pipeline is connected in parallel with the branch channel 1. The filter overflow valve is arranged in the branch channel 2; The filter overflow valve comprises: A relief valve, comprising a relief valve body, a vent pipe, a valve core, a spring three and a relief valve cover, wherein the relief valve body is arranged in the bottle valve body, the vent pipe and the relief valve cover are arranged at two ends of the relief valve body respectively, the valve core is arranged in the chamber of the relief valve body, a gas channel three is arranged in the chamber of the relief valve body, the gas channel three is located between the valve core and the vent pipe, a sealing plug is arranged at one end of the valve core close to the gas channel three, for sealing the gas channel three, a gas channel four is formed inside the valve core, a through hole is opened on the side wall of the valve core, and the spring three is sleeved on the valve core; A 10 μm filter, comprising a nozzle and a filter screen, wherein the nozzle is threadedly connected to an end of the overflow valve cover away from the valve core, the filter screen is clamped between the nozzle and the overflow valve cover, and a gas channel 5 is opened in the nozzle; A TPRD discharge device is provided on the top of the bottle valve body, and the TPRD discharge device is arranged in a discharge channel running through the bottle valve body.

2. According to claim 1, the integrated valve for 70MPa high-pressure hydrogen bottle, It is characterized in that The pilot-operated solenoid valve comprises: A pilot nozzle, wherein a gas channel 1 is provided in the pilot nozzle, and a lower end of the gas channel 1 is connected to the main channel; A plugging mechanism, the plugging mechanism comprising a solenoid valve static iron core, a spring 1 and a pilot sealing plug, the upper end of the spring 1 is connected to the solenoid valve static iron core, the lower end of the spring 1 is connected to the pilot sealing plug, the spring 1 is used to provide thrust to the pilot sealing plug, the pilot sealing plug is used to seal the gas channel 1, and the upper end of the gas channel 1 is connected to one end of the gas pipeline; The unsealing mechanism is used to provide a pulling force to the pilot sealing plug, and the direction of the pulling force is opposite to the direction of the thrust.

3. The integrated bottle valve for 70MPa high pressure hydrogen according to claim 2, It is characterized in that The unblocking mechanism comprises: The outer shell comprises an upper magnetic conductive end cover, a magnetic conductive shell and a lower magnetic conductive end cover, wherein the upper magnetic conductive end cover and the lower magnetic conductive end cover are respectively arranged at the upper and lower ends of the magnetic conductive shell; A coil, wherein the coil is fixed in the housing, and the interior of the coil forms a cylindrical cavity; A sealed shell, the upper end of which passes through the lower magnetic conductive end cover and extends into the cylindrical cavity, a cylindrical channel is formed inside the sealed shell, and the central axis of the cylindrical channel coincides with the central axis of the gas channel 1; The electromagnetic valve moving iron core is arranged in the cylindrical channel, the pilot sealing plug is threadedly connected to the lower end of the electromagnetic valve moving iron core, and the upper end of the spring 1 passes through the inner hole of the electromagnetic valve moving iron core and is connected to the electromagnetic valve static iron core.

4. The integrated bottle valve for 70MPa high pressure hydrogen according to claim 3, It is characterized in that The solenoid valve main valve comprises: A sealing valve seat, wherein the sealing valve seat is threadedly connected to the bottle valve body and has a second gas channel inside, wherein the second gas channel is connected to the first branch channel; A sealing cover, the sealing cover is threadedly connected to one side of the bottom of the bottle valve body, the sealing cover is provided with a spring limiting groove, and a second spring is fixed in the spring limiting groove; A sealing valve flap, wherein the sealing valve flap is arranged between the sealing valve seat and the sealing cover, the end of the spring 2 away from the sealing cover is fixedly connected to the sealing valve flap, the end of the sealing valve flap close to the sealing valve seat is provided with a semi-spherical structure, the semi-spherical structure forms a seal with the outlet of the gas channel 2, the end of the gas pipeline away from the pilot solenoid valve is located on one side of the semi-spherical structure, and one end of the branch channel 2 is located on the other side of the semi-spherical structure.

5. The integrated bottle valve for 70MPa high-pressure hydrogen according to claim 1, It is characterized in that The TPRD discharge device comprises: A TPRD valve body, wherein the TPRD valve body is arranged in the bottle valve body, wherein an accommodation cavity with an upper opening is arranged inside the TPRD valve body, and a gas channel 6 communicating with the outside is arranged downward at the bottom of the accommodation cavity; A thrombolytic cap, wherein the thrombolytic cap is threadedly connected to the upper portion of the accommodating cavity, and an alloy accommodating cavity is formed at the lower end of the thrombolytic cap, wherein a fusible alloy is cast in the alloy accommodating cavity; A thermally conductive cap, the thermally conductive cap is arranged in the accommodating cavity, the upper end of the thermally conductive cap is inserted into the alloy accommodating cavity, the upper end surface of the thermally conductive cap is against the lower end surface of the fusible alloy, and a guide hole is opened in the middle of the lower end surface of the thermally conductive cap; A pressure-bearing rod, the upper end of which is inserted into the guide hole, a disc spring is arranged between the pressure-bearing rod and the heat-conducting cap, one end of the disc spring is connected to the heat-conducting cap, and the other end is connected to the pressure-bearing rod, and a mounting groove is arranged at the bottom of the pressure-bearing rod; A sealing cone head, the upper end of which is embedded in the mounting groove, the lower end of which is in the shape of an inverted cone, and a seal is formed between the sealing cone head and the gas channel six.

6. The integrated bottle valve for 70MPa high pressure hydrogen according to claim 5, It is characterized in that A gas discharge port is provided on the side wall of the TPRD valve body, and the gas discharge port penetrates the side wall of the TPRD valve body and is communicated with the accommodating cavity.

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