Pressure reducing valve for 35MPa hydrogen energy
The 35MPa hydrogen reduction valve with dual-stage pressure regulation and safety features addresses high outlet pressures and safety concerns in hydrogen fuel cell systems, ensuring precise pressure stabilization and safety.
Patent Information
- Application Number
- CN202422160729.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-04
AI Technical Summary
When used in fuel cell vehicles, existing pressure reducing valves have problems such as high outlet pressure or insufficient safety, especially lack of solenoid valve control.
A 35MPa hydrogen energy pressure reducing valve is designed, adopting a two-stage pressure reducing structure, combining solenoid valve control and drainage components, through the coordinated work of the first pressure reducing valve core and the second pressure reducing valve core, high-precision pressure adjustment is achieved, and hydrogen is automatically discharged when the gas pressure reaches the preset threshold, ensuring the safety of the system.
High-precision hydrogen pressure regulation is achieved, ensuring the stable supply of hydrogen in the fuel cell system, and improving safety and overall system performance.
Smart Images
Figure CN223105348U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a pressure reducing valve for 35MPa hydrogen energy. Background Technique
[0002] Hydrogen energy has always been the focus of attention in the global energy community, and fuel cell vehicles are one of the important fields on the road of hydrogen energy application and development. The pressure reducing valve is a key component in the hydrogen supply system. The inlet high-pressure hydrogen is reduced to a required outlet pressure through the pressure reducing valve and can be stably output. Some existing foreign pressure reducing valves only have primary pressure reduction, and the outlet pressure is generally too high to directly enter the fuel cell stack. Some pressure reducing valves have primary and secondary pressure reduction, but there is no solenoid valve control, so the safety is a bit poor.
[0003] Therefore, it is very necessary to design a pressure reducing valve for 35MPa hydrogen energy with strong practicability, safety and high efficiency. Content of the Utility Model
[0004] The purpose of the utility model is to provide a pressure reducing valve for 35MPa hydrogen energy to solve the problems put forward in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical scheme: A pressure reducing valve for 35MPa hydrogen energy includes a first pressure reducing valve body. One side of the first pressure reducing valve body is connected with an air inlet joint. One side of the first pressure reducing valve body is connected with a solenoid valve group. The inside of the first pressure reducing valve body is connected with a first pressure reducing valve core. One side of the first pressure reducing valve core is connected with a pressing end cover. A pressure reducing component is arranged on the outer side of the first pressure reducing valve core. One side of the first pressure reducing valve body is connected with an exhaust joint. An exhaust joint O-ring is connected to the outer side of the exhaust joint. A connecting component is arranged on one side of the first pressure reducing valve body. The inside of the connecting component is connected with a second pressure reducing valve core. The outer side of the connecting component is connected with a second pressure reducing valve body. One side of the second pressure reducing valve body is connected with a relief component. One side of the second pressure reducing valve body is connected with a pressure sensor interface.
[0006] According to the above technical scheme, the first pressure reducing valve body and the air inlet joint are in threaded connection. An air inlet seal ring is sleeved on the outer side of the air inlet joint. A pressing end cover seal ring is sleeved on the outer side of the pressing end cover.
[0007] According to the above technical scheme, the pressure reducing component includes a first pressure reducing valve connecting sleeve. The first pressure reducing valve connecting sleeve is connected to the outer side of the first pressure reducing valve core. The outer side of the first pressure reducing valve connecting sleeve is provided with a first large Y-ring of the pressure reducing valve core, a first large sliding sleeve of the pressure reducing valve core, a first spring of the pressure reducing valve core, a first small sliding sleeve of the pressure reducing valve core and a first small Y-ring of the pressure reducing valve core.
[0008] According to the above technical solution, the connection component includes a second pressure reducing valve connecting sleeve, the second pressure reducing valve connecting sleeve is connected to the first pressure reducing valve body, a connecting sleeve sealing ring is sleeved outside the second pressure reducing valve connecting sleeve, a connecting sleeve ventilation block is connected inside the second pressure reducing valve connecting sleeve, a ventilation block gasket and a ventilation block small screw are arranged on one side of the connecting sleeve ventilation block, a second pressure reducing valve core spring is arranged outside the second pressure reducing valve core, a second pressure reducing valve core small Y-ring and a 0.1 mm spring adjusting gasket are arranged inside the second pressure reducing valve connecting sleeve, and a second pressure reducing valve core large Y-ring is arranged outside the second pressure reducing valve core.
[0009] According to the above technical solution, the discharge component includes a second discharge port joint, the second discharge port joint is connected to the second pressure reducing valve body, a first discharge port joint is connected to one side of the second discharge port joint, a discharge port check valve sleeve, a check valve gasket and a check valve spring are arranged inside the second discharge port joint, and a discharge port joint sealing ring and a discharge port joint gasket are arranged outside the second discharge port joint.
[0010] According to the above technical solution, the second discharge port joint and the second pressure reducing valve body are in threaded connection, and the second discharge port joint and the first discharge port joint are in threaded connection.
[0011] According to the above technical solution, a check valve passage is arranged inside the discharge port check valve sleeve, the check valve gasket and the check valve spring are sequentially arranged in the check valve passage, and the elastic force of the check valve spring is adjustable to control the opening pressure of the discharge port.
[0012] According to the above technical solution, a filter screen is arranged at the intake end of the intake port joint.
[0013] According to the above technical solution, a silencer is arranged at the exhaust end of the exhaust joint, and a waterproof coating is arranged on the outer surface of the exhaust joint.
[0014] According to the above technical solution, anticorrosive coatings are arranged on the outer surfaces of the first pressure reducing valve body and the second pressure reducing valve body.
[0015] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:
[0016] (1) By providing a two-stage pressure reducing structure, through the collaborative work of the first pressure reducing valve core and the second pressure reducing valve core, high-precision pressure regulation can be achieved. Each stage of pressure reduction can stably reduce the hydrogen pressure to a predetermined value, designed for 35 MPa high-pressure hydrogen, and can meet the pressure reduction requirements during the storage, transportation and use of high-pressure hydrogen;
[0017] (2) By providing an exhaust joint and a relief component, during the pressure reduction process, when the gas pressure reaches a preset threshold or specific conditions, part of the hydrogen gas is discharged through the exhaust joint, which helps to maintain the pressure balance inside the pressure reducing valve. The relief component can automatically open when the gas pressure is too high after secondary pressure reduction, reducing the gas pressure in the gas outlet channel and protecting the components connected to the outer port of the gas outlet channel, further enhancing the safety performance of the system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of the present utility model;
[0019] In the figure: 1. First pressure reducing valve body; 11. First pressure reducing valve spool small sliding sleeve; 12. Exhaust joint; 13. Exhaust joint O-ring; 14. Second pressure reducing valve body; 15. Second pressure reducing valve spool; 16. Second pressure reducing valve spool large Y-ring; 17. Second pressure reducing valve spool spring; 18. Second pressure reducing valve connecting sleeve; 19. Connecting sleeve sealing ring; 20. Connecting sleeve vent block; 2. Inlet joint; 21. Vent block gasket; 22. Vent block small screw; 23. Second pressure reducing valve spool small Y-ring; 24. 0.1mm spring adjusting gasket; 25. First relief port joint; 26. Second relief port joint; 27. Relief port check valve sleeve; 28. Check valve gasket; 29. Check valve spring; 3. Inlet sealing ring; 30. Relief port joint sealing ring; 31. Relief port joint gasket; 32. Solenoid valve group; 33. Pressure sensor interface; 4. Compression end cover; 5. Compression end cover sealing ring; 6. First pressure reducing valve spool; 7. First pressure reducing valve spool large Y-ring; 8. First pressure reducing valve spool large sliding sleeve; 9. First pressure reducing valve spool spring; 10. First pressure reducing valve spool small Y-ring. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0021] Please refer to Figure 1, the present utility model provides a technical solution: a pressure reducing valve for 35MPa hydrogen use, comprising a first pressure reducing valve body 1, an air inlet joint 2 is connected to one side of the first pressure reducing valve body 1, a solenoid valve group 32 is connected to one side of the first pressure reducing valve body 1, a first pressure reducing valve core 6 is connected inside the first pressure reducing valve body 1, a pressing end cover 4 is connected to one side of the first pressure reducing valve core 6, a pressure reducing component is arranged outside the first pressure reducing valve core 6, an exhaust joint 12 is connected to one side of the first pressure reducing valve body 1, an exhaust joint O-ring 13 is connected to the outside of the exhaust joint 12, a connecting component is arranged on one side of the first pressure reducing valve body 1, a second pressure reducing valve core 15 is connected inside the connecting component, a second pressure reducing valve body 14 is connected to the outside of the connecting component, a relief component is connected to one side of the second pressure reducing valve body 14, and a pressure sensor interface 33 is connected to one side of the second pressure reducing valve body 14; when working, one end of the air inlet joint 2 is connected to the hydrogenation pipeline and the other end is connected to the first pressure reducing valve body 1 and sealed by the air inlet O-ring 3. High-pressure hydrogen enters the solenoid valve cavity from the air inlet joint 2, and the solenoid valve cavity channel is controlled by the solenoid valve group 32. When the solenoid valve is opened, high-pressure hydrogen enters the inside of the first pressure reducing valve cavity through the channel from the solenoid valve cavity. The first pressure reducing valve cavity is equipped with a first pressure reducing valve core 6, one end of the first pressure reducing valve core 6 is pressed by the pressing end cover 4, and the pressing end cover 4 is fixed on the first pressure reducing valve body 1 by screws. During the normal operation of the pressure reducing valve, the exhaust joint 12 and the exhaust joint O-ring 13 outside it allow part of the hydrogen to be discharged through the exhaust joint 12 when the gas pressure reaches the preset threshold or specific conditions during the pressure reduction process. Maintain the pressure balance inside the pressure reducing valve and prevent excessive or too low pressure from damaging the pressure reducing valve and the connected equipment. The first-stage pressure reduction is carried out through the pressure reducing component, and the hydrogen after the first-stage pressure reduction enters the second pressure reducing valve cavity through the channel. It is connected through the connecting component and the second-stage pressure reduction is carried out inside, and the hydrogen after the second-stage pressure reduction flows out from the air outlet. When the gas pressure is too high after the second-stage pressure reduction, the relief component will be opened to reduce the gas pressure in the air outlet channel, thereby protecting the components connected to the outer port of the air outlet channel. When the hydrogen is reduced in pressure, the high-pressure hydrogen enters the solenoid valve cavity through the air inlet channel, and after being controlled to open by the solenoid valve, it flows into the first pressure reducing valve cavity through the channel. Here, through the continuous reciprocating motion of the first pressure reducing valve core 6, the first-stage pressure reduction is carried out. The hydrogen channel after the first-stage pressure reduction enters the second pressure reducing valve cavity, and here, through the continuous reciprocating motion of the second pressure reducing valve core 15, the second-stage pressure reduction is carried out. The hydrogen after the second-stage pressure reduction flows out from the air outlet. Among them, the solenoid valve cavity is a closed space inside the pressure reducing valve, located between the air inlet joint 2 and the first pressure reducing valve cavity. The first pressure reducing valve cavity is a closed space inside the pressure reducing valve for carrying out the first-stage pressure reduction treatment, connected to the solenoid valve cavity, and conveys the hydrogen after pressure reduction to the second pressure reducing valve cavity through the channel.The second pressure reducing valve chamber is an enclosed space inside the pressure reducing valve for performing the second-stage pressure reduction process. It is connected to the first pressure reducing valve chamber through a connecting component and outputs the pressure-reduced hydrogen gas to the air outlet. This device is equipped with a two-stage pressure reduction mechanism (the first pressure reducing valve core 6 and the second pressure reducing valve core 15), which effectively reduces the high-pressure hydrogen gas to the required low-pressure range. The multi-stage pressure reduction design improves the accuracy and efficiency of pressure reduction and ensures the stable supply of hydrogen gas. The device is equipped with an exhaust joint 12 and a relief component, allowing part of the hydrogen gas to be discharged through the exhaust joint 12 when the gas pressure reaches a preset threshold or specific conditions during the pressure reduction process. This helps to maintain the pressure balance inside the pressure reducing valve. The relief component can automatically open when the gas pressure is too high after the second-stage pressure reduction, reducing the gas pressure in the air outlet passage and protecting the components connected to the outer port of the air outlet passage, further enhancing the safety performance of the system.
[0022] The first pressure reducing valve body 1 and the air inlet joint 2 are connected by threads. An air inlet sealing ring 3 is sleeved outside the air inlet joint 2, and a compression end cover sealing ring 5 is sleeved outside the compression end cover 4; by rotating the air inlet joint 2, it can be firmly fixed on the first pressure reducing valve body 1 to achieve a sealed connection. The air inlet sealing ring 3 is usually made of an elastic material, such as rubber or silica gel, etc., and has good sealing performance. When the air inlet joint 2 is tightened with the first pressure reducing valve body 1, the air inlet sealing ring 3 is compressed and fills the gap between the two, thus achieving a good sealing effect and preventing hydrogen gas leakage. The compression end cover sealing ring 5 also plays the role of sealing.
[0023] The decompression component includes a first pressure reducing valve connecting sleeve, which is connected to the outside of the first pressure reducing valve spool 6. On the outside of the first pressure reducing valve connecting sleeve, there are a first large Y-ring 7 of the pressure reducing valve spool, a first large sliding sleeve 8 of the pressure reducing valve spool, a first pressure reducing valve spool spring 9, a first small sliding sleeve 11 of the pressure reducing valve spool, and a first small Y-ring 10 of the pressure reducing valve spool. Inside the device, there is a first pressure reducing valve spool 6. One end of the first pressure reducing valve spool 6 is pressed by a pressing end cover 4, and the pressing end cover 4 is fixed to the first pressure reducing valve body 1 by screws. Inside the first pressure reducing valve body 1, there are a first large Y-ring 7 of the pressure reducing valve spool, a first large sliding sleeve 8 of the pressure reducing valve spool, a first pressure reducing valve spool spring 9, a first small Y-ring 10 of the pressure reducing valve spool, and a first small sliding sleeve 11 of the pressure reducing valve spool. Primary decompression is carried out through the first pressure reducing valve spool 6, the first pressure reducing valve spool spring 9, and the first pressure reducing valve body 1. The hydrogen gas after primary decompression enters the second pressure reducing valve cavity through a passage. Among them, when high-pressure hydrogen gas enters the first pressure reducing valve cavity, the first pressure reducing valve spool 6 will be affected by the gas pressure and produce a certain displacement or movement. The first pressure reducing valve spool spring 9 is installed around the first pressure reducing valve spool 6 and is used to apply a reverse force to the first pressure reducing valve spool 6. When the gas pressure exceeds the pre-tightening force of the spring, the first pressure reducing valve spool 6 will overcome the spring force and move, allowing the high-pressure hydrogen gas to pass through and enter the next stage of decompression or output. The two Y-rings are respectively installed at different positions of the first pressure reducing valve spool 6 to provide a sealing effect. The two sliding sleeves are respectively installed on the outside of the first pressure reducing valve spool 6 to guide the movement of the first pressure reducing valve spool 6 and may provide a certain supporting role.
[0024] The connecting component includes a second pressure reducing valve connecting sleeve 18, which is connected to the first pressure reducing valve body 1. A connecting sleeve sealing ring 19 is sleeved outside the second pressure reducing valve connecting sleeve 18. A connecting sleeve venting block 20 is connected inside the second pressure reducing valve connecting sleeve 18. A venting block gasket 21 and a venting block small screw 22 are arranged on one side of the connecting sleeve venting block 20. A second pressure reducing valve core spring 17 is arranged outside the second pressure reducing valve core 15. A second pressure reducing valve core small Y-ring 23 and a 0.1mm spring adjusting gasket 24 are arranged inside the second pressure reducing valve connecting sleeve 18. A second pressure reducing valve core large Y-ring 16 is arranged outside the second pressure reducing valve core 15. The second pressure reducing valve connecting sleeve 18 is installed in the second pressure reducing valve cavity and sealed by the connecting sleeve sealing ring 19. The connecting sleeve venting block 20 is fixed to the second pressure reducing valve connecting sleeve 18 by threads. The venting block gasket 21 is fixed to the connecting sleeve venting block 20 by the venting block small screw 22. One end of the second pressure reducing valve core 15 is inserted into the second pressure reducing valve connecting sleeve 18, the second pressure reducing valve core spring 17 is installed in the middle, and one end is installed in the second pressure reducing valve body 14. The second pressure reducing valve body 14 is fixed to the first pressure reducing valve body 1 through a threaded hole. The second pressure reducing valve core large Y-ring 16 and the second pressure reducing valve core small Y-ring 23 are installed on the second pressure reducing valve core 15. Secondary pressure reduction is carried out through the second pressure reducing valve core 15 and the venting block gasket 21, and the hydrogen after secondary pressure reduction flows out from the air outlet. By setting the connecting component, further secondary pressure reduction of the hydrogen after primary pressure reduction is realized. This design of double-stage pressure reduction can more accurately control the pressure of hydrogen.
[0025] The discharging component includes a second discharging port joint 26, which is connected to the second pressure reducing valve body 14. A first discharging port joint 25 is connected to one side of the second discharging port joint 26. A discharging port check valve sleeve 27, a check valve gasket 28 and a check valve spring 29 are arranged inside the second discharging port joint 26. A discharging port joint sealing ring 30 and a discharging port joint gasket 31 are arranged outside the second discharging port joint 26. Inside the second discharging port joint 26, a discharging port check valve sleeve 27 is arranged. This check valve sleeve is a key component of the discharging port check valve. It allows gas to flow in a specific direction (usually from inside the valve body to the outside), while remaining sealed in the opposite direction. The check valve gasket 28 is installed in the appropriate position of the discharging port check valve sleeve 27 to enhance the sealing performance of the check valve. This gasket is usually made of corrosion-resistant and wear-resistant materials to ensure reliability under long-term use. The check valve spring 29 is installed inside the check valve sleeve to provide the necessary closing force for the check valve. When the pressure inside the valve body decreases or there is not enough external pressure to push the check valve open, the spring will keep the check valve in the closed state. By setting the discharging component, it is ensured that when the internal pressure of the pressure reducing valve exceeds the set value or in case of an abnormality, the excess pressure can be released in time, thereby protecting the pressure reducing valve and the equipment and pipelines connected thereto from the possible damage caused by excessive pressure.
[0026] The second discharge port joint 26 and the second pressure reducing valve body 14 are in threaded connection, and the second discharge port joint 26 and the first discharge port joint 25 are in threaded connection; the threaded connection ensures sealing.
[0027] A check valve passage is provided inside the discharge port check valve sleeve 27. The check valve gasket 28 and the check valve spring 29 are sequentially arranged in the check valve passage, and the elastic force of the check valve spring 29 is adjustable to control the opening pressure of the discharge port; a check valve passage is designed inside the discharge port check valve sleeve 27, and this passage is the only way for gas to flow through. The check valve gasket 28 is first installed at an appropriate position inside the check valve passage. Then, the check valve spring 29 is placed on the check valve gasket 28 and extends along the direction of the passage. One end of the spring is fixed at a fixed point inside the valve sleeve (such as by means of a circlip, screw, etc.), and the other end is connected to the valve flap of the check valve (although not directly mentioned in this description, there is usually such a component in the check valve design). The elastic force of the check valve spring 29 can be changed by adjustment.
[0028] A filter screen is provided at the intake end of the intake port joint 2; the filter screen can effectively block impurities such as solid particles and dust carried in the gas entering the equipment. It protects the cleanliness and safety of the internal components of the equipment.
[0029] A silencer is provided at the exhaust end of the exhaust joint 12, and a waterproof coating is provided on the outer surface of the exhaust joint 12; the main function of the silencer is to reduce the noise generated during exhaust. The surface of the exhaust joint is specially treated, such as spraying a waterproof coating (such as Teflon, polyurethane, etc.), and these coatings have excellent waterproof, oil-proof and chemical corrosion resistance properties, and can effectively block the intrusion of external moisture.
[0030] Anticorrosion coatings are provided on the outer surfaces of the first pressure reducing valve body 1 and the second pressure reducing valve body 14; the anticorrosion coatings can effectively isolate the contact between the valve body and the external corrosive environment (such as humid, acidic or alkaline media), slow down or prevent the corrosion rate of the valve body material, and thus significantly extend the service life of the valve body.
[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
Claims
1. A pressure reducing valve for 35 MPa hydrogen energy use, comprising a first pressure reducing valve body (1), characterized in that: One side of the first pressure reducing valve body (1) is connected with an air inlet joint (2), one side of the first pressure reducing valve body (1) is connected with a solenoid valve group (32), the inside of the first pressure reducing valve body (1) is connected with a first pressure reducing valve core (6), one side of the first pressure reducing valve core (6) is connected with a pressing end cover (4), a pressure reducing component is arranged outside the first pressure reducing valve core (6), one side of the first pressure reducing valve body (1) is connected with an exhaust joint (12), an exhaust joint O-ring (13) is connected to the outside of the exhaust joint (12), a connecting component is arranged on one side of the first pressure reducing valve body (1), a second pressure reducing valve core (15) is connected to the inside of the connecting component, a second pressure reducing valve body (14) is connected to the outside of the connecting component, a bleeding component is connected to one side of the second pressure reducing valve body (14), and a pressure sensor interface (33) is connected to one side of the second pressure reducing valve body (14).
2. The pressure reducing valve for 35 MPa hydrogen energy use according to claim 1, wherein: The first pressure reducing valve body (1) and the air inlet joint (2) are in threaded connection, an air inlet sealing ring (3) is sleeved on the outside of the air inlet joint (2), and a pressing end cover sealing ring (5) is sleeved on the outside of the pressing end cover (4).
3. A pressure reducing valve for 35 MPa hydrogen energy use according to claim 1, characterized in that: The pressure reducing component includes a first pressure reducing valve connecting sleeve, the first pressure reducing valve connecting sleeve is connected to the outside of the first pressure reducing valve core (6), and a first pressure reducing valve core large Y-ring (7), a first pressure reducing valve core large sliding sleeve (8), a first pressure reducing valve core spring (9), a first pressure reducing valve core small sliding sleeve (11) and a first pressure reducing valve core small Y-ring (10) are arranged on the outside of the first pressure reducing valve connecting sleeve.
4. A pressure reducing valve for 35 MPa hydrogen energy according to claim 1, characterized in that: The connecting component includes a second pressure reducing valve connecting sleeve (18), the second pressure reducing valve connecting sleeve (18) is connected to the first pressure reducing valve body (1), a connecting sleeve sealing ring (19) is sleeved on the outside of the second pressure reducing valve connecting sleeve (18), a connecting sleeve venting block (20) is connected to the inside of the second pressure reducing valve connecting sleeve (18), a venting block gasket (21) and a venting block small screw (22) are arranged on one side of the connecting sleeve venting block (20), a second pressure reducing valve core spring (17) is arranged on the outside of the second pressure reducing valve core (15), a second pressure reducing valve core small Y-ring (23) and a 0.1 mm spring adjusting gasket (24) are arranged on the inside of the second pressure reducing valve connecting sleeve (18), and a second pressure reducing valve core large Y-ring (16) is arranged on the outside of the second pressure reducing valve core (15).
5. A 35 MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: The bleeding component includes a second bleeding port joint (26), the second bleeding port joint (26) is connected to the second pressure reducing valve body (14), a first bleeding port joint (25) is connected to one side of the second bleeding port joint (26), a bleeding port check valve sleeve (27), a check valve gasket (28) and a check valve spring (29) are arranged inside the second bleeding port joint (26), and a bleeding port joint sealing ring (30) and a bleeding port joint gasket (31) are arranged on the outside of the second bleeding port joint (26).
6. A 35 MPa hydrogen energy reducing valve according to claim 5, characterized in that: The second drain port joint (26) and the second pressure reducing valve body (14) are threadedly connected, and the second drain port joint (26) and the first drain port joint (25) are threadedly connected.
7. A pressure reducing valve for 35 MPa hydrogen energy use according to claim 5, characterized in that: A check valve passage is provided inside the drain port check valve sleeve (27), and the check valve gasket (28) and the check valve spring (29) are sequentially arranged in the check valve passage, and the elastic force of the check valve spring (29) is adjustable to control the opening pressure of the drain port.
8. A pressure reducing valve for 35 MPa hydrogen energy according to claim 1, characterized in that: A filter screen is provided at the air inlet end of the air inlet joint (2).
9. A 35 MPa hydrogen energy relief valve according to claim 1, characterized in that: A silencer is provided at the exhaust end of the exhaust joint (12), and a waterproof coating is provided on the outer surface of the exhaust joint (12).
10. A 35 MPa hydrogen energy relief valve according to claim 1, characterized in that: Anticorrosive coatings are provided on the outer surfaces of the first pressure reducing valve body (1) and the second pressure reducing valve body (14).