Pressure reducing valve for 70MPa hydrogen energy
By designing a 70MPa hydrogen pressure reducing valve with multi-stage pressure reduction and solenoid valve control, the problems of high outlet pressure and insufficient safety of existing pressure reducing valves are solved, high-precision pressure reduction and stable hydrogen supply are achieved, and system safety is enhanced.
Patent Information
- Application Number
- CN202422160892.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-04
- Publication Date
- 2025-09-12
- 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 the lack of solenoid valve control.
A 70MPa pressure reducing valve for hydrogen energy was designed, which adopts a multi-stage pressure reducing design, includes the first and second pressure reducing components, and is equipped with a solenoid valve group. The internal pressure balance is maintained through the exhaust joint and the relief component to enhance safety.
High-precision and efficient hydrogen decompression is achieved, ensuring a stable supply of hydrogen, and improving the safety and stability of the system through solenoid valve control and discharge components.
Smart Images
Figure CN223331189U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure reducing valves, in particular to a 70MPa pressure reducing valve for hydrogen energy. Background Art
[0002] Hydrogen energy has long been a focus of attention in the global energy sector, and fuel cell vehicles (FCVs) are a key area of hydrogen energy application and development. As a strategically important clean energy source, numerous countries around the world have incorporated it into their national strategic plans and are accelerating the commercialization, demonstration, and deployment of FCVs.
[0003] The pressure reducing valve is a key component in the hydrogen supply system, reducing the high-pressure inlet hydrogen to a desired outlet pressure and ensuring stable output. Some existing pressure reducing valves from abroad only have a single-stage pressure reduction mechanism, resulting in high outlet pressures and making them unsuitable for direct use in fuel cell stacks. Other valves have a single and two-stage pressure reduction mechanism but lack solenoid valve control, making them less safe.
[0004] Therefore, it is necessary to design a 70MPa hydrogen energy pressure reducing valve that is practical and efficient. Utility Model Content
[0005] The purpose of the present utility model is to provide a 70MPa hydrogen energy pressure reducing valve to solve the problems raised in the above background technology.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A 70MPa hydrogen energy pressure reducing valve, comprising a first pressure reducing valve body, a connector assembly connected to one side of the first pressure reducing valve body, a solenoid valve group connected to one side of the first pressure reducing valve body, a first pressure reducing valve core connected to the interior of the first pressure reducing valve core, a compression end cover connected to one side of the first pressure reducing valve core, a compression end cover sealing ring sleeved on the outer side of the compression end cover, a first pressure reducing assembly provided on the outer side of the first pressure reducing valve core, an exhaust joint connected to one side of the first pressure reducing valve body, an exhaust joint O-ring connected to the outer side of the exhaust joint, a second pressure reducing assembly provided on one side of the first pressure reducing valve body, a second pressure reducing valve core connected to the interior of the second pressure reducing assembly, a second pressure reducing valve body connected to the outer side of the second pressure reducing assembly, a discharge assembly connected to one side of the second pressure reducing valve body, and a pressure sensor interface connected to one side of the second pressure reducing valve body.
[0007] According to the above technical solution, the joint assembly includes an air inlet joint, which is connected to the valve body of the first pressure reducing valve, one end of the air inlet joint is provided with a first air inlet sealing ring, the other end of the air inlet joint is provided with a second air inlet sealing ring, and one side of the air inlet joint is provided with a thread.
[0008] According to the above technical solution, the first pressure reducing assembly includes a first pressure reducing valve connecting sleeve, which is connected to the outside of the first pressure reducing valve core, and the outside of the first pressure reducing valve core is provided with a first pressure reducing valve core large Y-ring, a first pressure reducing valve core large sliding sleeve, a first pressure reducing valve core spring, a first pressure reducing valve core small sliding sleeve and a first pressure reducing valve core small Y-ring.
[0009] According to the above technical solution, the second pressure reducing assembly includes a second pressure reducing valve connecting sleeve, which is connected to the first pressure reducing valve body, and the outer sleeve of the second pressure reducing valve connecting sleeve is provided with a connecting sleeve sealing ring, and the interior of the second pressure reducing valve connecting sleeve is connected with a connecting sleeve ventilation block, and one side of the connecting sleeve ventilation block is provided with a ventilation block gasket and a ventilation block small screw, the outer side of the second pressure reducing valve core is provided with a second pressure reducing valve core spring, the inner side of the second pressure reducing valve connecting sleeve is provided with a second pressure reducing valve core small Y-ring and a 0.4mm spring adjustment gasket, and the outer side of the second pressure reducing valve core is provided with a second pressure reducing valve core large Y-ring.
[0010] According to the above technical solution, the second pressure reducing valve connecting sleeve and the connecting sleeve vent block are threadedly connected.
[0011] According to the above technical solution, the discharge assembly includes a second discharge port joint, which is connected to the second pressure reducing valve body, one side of the second discharge port joint is connected to the first discharge port joint, the interior of the second discharge port joint is provided with a discharge port one-way valve sleeve, a one-way valve gasket and a one-way valve spring, and the outside of the second discharge port joint is provided with a discharge port joint sealing ring and a discharge port joint gasket.
[0012] According to the above technical solution, the second discharge port joint and the second pressure reducing valve body are threadedly connected, and the second discharge port joint and the first discharge port joint are threadedly connected.
[0013] According to the above technical solution, a reinforcing rib is provided at the connection between the first pressure reducing valve body and the second pressure reducing valve body.
[0014] According to the above technical solution, the reinforcing ribs are spiral-shaped and evenly distributed at the connection between the first pressure-reducing valve body and the second pressure-reducing valve body.
[0015] According to the above technical solution, a muffler is provided on one side of the exhaust joint, the interior of the muffler is filled with sound-absorbing material, and a plurality of small holes are provided on the muffler.
[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:
[0017] (1) By setting up the first and second pressure reducing components and the solenoid valve group, high-pressure hydrogen can be effectively reduced to the required low pressure range. The multi-stage pressure reduction design improves the accuracy and efficiency of pressure reduction, ensuring a stable supply of hydrogen. The solenoid valve group can control the switch to ensure safety during operation.
[0018] (2) By providing an exhaust joint and a relief assembly, part of the hydrogen is allowed to be discharged through the exhaust joint during the decompression process, which helps to maintain the pressure balance inside the pressure reducing valve. The relief assembly can automatically open when the gas pressure is too high after the second stage of decompression, reducing the gas pressure in the outlet channel and protecting the components connected to the outer port of the outlet channel, further enhancing the safety performance of the system;
[0019] (3) By providing reinforcing ribs that are evenly distributed inside the valve body, each position of the connection is fully reinforced, and the device can remain stable under high pressure. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural diagram of the utility model;
[0021] In the figure: 1. First pressure reducing valve body; 11. Small Y-ring of first pressure reducing valve core; 12. Small sliding sleeve of first pressure reducing valve core; 13. Exhaust connector; 14. Exhaust connector O-ring; 15. Second pressure reducing valve body; 16. Second pressure reducing valve core; 17. Large Y-ring of second pressure reducing valve core; 18. Second pressure reducing valve core spring; 19. Second pressure reducing valve connecting sleeve; 20. Connecting sleeve sealing ring; 2. Air inlet connector; 21. Connecting sleeve vent block; 22. Vent block gasket; 23. Vent block small screw; 24. Second pressure reducing valve core small Y-ring; 25. 0.4m m spring adjustment gasket; 26. First discharge port joint; 27. Second discharge port joint; 28. Discharge port one-way valve sleeve; 29. One-way valve gasket; 3. First air inlet sealing ring; 30. One-way valve spring; 31. Discharge port joint sealing ring; 32. Discharge port joint gasket; 33. Solenoid valve group; 34. Pressure sensor interface; 4. Second air inlet sealing ring; 5. Clamping end cover; 6. Clamping end cover sealing ring; 7. First pressure reducing valve core; 8. Large Y-ring of the first pressure reducing valve core; 9. Large sliding sleeve of the first pressure reducing valve core; 10. First pressure reducing valve core spring. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0023] See also Figure 1The utility model provides a technical solution: a 70MPa hydrogen energy pressure reducing valve, comprising a first pressure reducing valve body 1, one side of the first pressure reducing valve body 1 is connected to a joint assembly, one side of the first pressure reducing valve body 1 is connected to a solenoid valve group 33, the interior of the first pressure reducing valve body 1 is connected to a first pressure reducing valve core 7, one side of the first pressure reducing valve core 7 is connected to a clamping end cover 5, the outer side of the clamping end cover 5 is provided with a clamping end cover sealing ring 6, the outer side of the first pressure reducing valve core 7 is provided with a first pressure reducing assembly, one side of the first pressure reducing valve body 1 is connected to an exhaust The gas connector 13 has an exhaust connector O-ring 14 connected to its outer side. A second pressure-reducing assembly is installed on one side of the first pressure-reducing valve body 1. A second pressure-reducing valve core 16 is connected to the interior of the second pressure-reducing assembly. The second pressure-reducing valve body 15 is connected to its outer side. A bleed assembly is connected to one side of the second pressure-reducing valve body 15. One side of the second pressure-reducing valve body 15 is connected to a pressure sensor interface 34. During operation, one end of the connector assembly is connected to the hydrogenation line, and the other end is connected to the first pressure-reducing valve body 1. High-pressure hydrogen enters the solenoid valve chamber through the connector assembly, with the solenoid valve assembly 33 controlling the passageway in the solenoid valve chamber. When the solenoid valve is open, high-pressure hydrogen enters the first pressure-reducing valve chamber through the passageway. The first pressure-reducing valve core 7 is installed within the first pressure-reducing valve chamber, with one end of the first pressure-reducing valve core 7 held in place by a compression end cap 5, which is screwed to the first pressure-reducing valve body 1. During normal operation of the pressure reducing valve, the exhaust connector 13 and its outer O-ring 14 allow some hydrogen to escape through the exhaust connector 13 when the gas pressure reaches a preset threshold or specific conditions. This maintains pressure balance within the pressure reducing valve, preventing damage to the valve and connected equipment caused by excessive or insufficient pressure. The first pressure reducing assembly performs a primary pressure reduction, where the hydrogen enters the valve chamber of the second pressure reducing valve through a channel. The second pressure reducing assembly then undergoes a secondary pressure reduction, where the hydrogen flows out of the outlet. If the gas pressure is too high after the secondary pressure reduction, the bleed assembly opens to reduce the gas pressure within the outlet channel, thereby protecting components connected to the outlet port. During hydrogen pressure reduction, the high-pressure hydrogen enters the solenoid valve chamber through the inlet channel. After the solenoid valve is opened, it flows through the channel into the first pressure reducing valve chamber, where the first pressure reduction is achieved through the continuous reciprocating motion of the first pressure reducing valve core 7. The hydrogen enters the second pressure reducing valve chamber through a channel, where the second pressure reduction is achieved through the continuous reciprocating motion of the second pressure reducing valve core 16. The hydrogen gas after the second stage of decompression flows out of the outlet. The solenoid valve cavity is an enclosed space within the pressure reducing valve, located between the connector assembly and the first pressure reducing valve cavity. The first pressure reducing valve cavity is the enclosed space within the pressure reducing valve for the first stage of decompression. It is connected to the solenoid valve cavity and transports the decompressed hydrogen gas to the second pressure reducing valve cavity through a channel.The second pressure reducing valve cavity is a closed space inside the pressure reducing valve for the second stage pressure reducing process. It is connected to the first pressure reducing valve cavity through the second pressure reducing assembly, and outputs the decompressed hydrogen to the gas outlet. This device is provided with a two-stage pressure reducing mechanism to effectively reduce the high-pressure hydrogen to the required low-pressure range. The multi-stage pressure reducing design improves the accuracy and efficiency of the pressure reducing and ensures a stable supply of hydrogen. The device is provided with an exhaust connector 13 and a discharge assembly to allow part of the hydrogen to be discharged through the exhaust connector 13 during the pressure reducing process. This helps to maintain the pressure balance inside the pressure reducing valve. The discharge assembly can automatically open when the gas pressure is too high after the second stage of pressure reducing, reduce the gas pressure in the gas outlet channel, protect the components connected to the outer port of the gas outlet channel, and further enhance the safety performance of the system.
[0024] The connector assembly includes an inlet connector 2, which is connected to the first pressure reducing valve body 1. A first inlet sealing ring 3 is sleeved on one end of the inlet connector 2, and a second inlet sealing ring 4 is sleeved on the other end of the inlet connector 2. One side of the inlet connector 2 is provided with threads. The threads of the inlet connector 2 tightly connect the hydrogenation pipeline. The second inlet sealing ring 4 ensures a tight seal, while the first inlet sealing ring 3 ensures a tight seal between the inlet connector 2 and the first pressure reducing valve body 1. Compared to a 35MPa pressure reducing valve, two sealing rings are used to ensure tight sealing under high pressure.
[0025] The first pressure-reducing assembly includes a first pressure-reducing valve connecting sleeve, which is connected to the outside of the first pressure-reducing valve core 7. The first pressure-reducing valve core 7 is equipped with a large Y-ring 8, a large sleeve 9, a spring 10, a small sleeve 12, and a small Y-ring 11. The first pressure-reducing valve core 7 is housed within the first pressure-reducing valve core 7. One end of the first pressure-reducing valve core 7 is held down by a compression end cap 5, which is screwed to the first pressure-reducing valve body 1. The first pressure-reducing valve core 7 is equipped with a large Y-ring 8, a large sleeve 9, a spring 10, a small Y-ring 11, and a small sleeve 12. The first pressure-reducing valve core 7, the first pressure-reducing valve spring 10, and the first pressure-reducing valve body 1 provide a primary pressure reduction. After this primary pressure reduction, hydrogen enters the valve chamber of the second pressure-reducing valve through a channel. Among them, when high-pressure hydrogen enters the valve cavity of the first pressure-reducing valve, the first pressure-reducing valve core 7 will be affected by the gas pressure, resulting in a certain displacement or movement. The first pressure-reducing valve core spring 10 is installed around the first pressure-reducing valve core 7 to apply a reverse force to the first pressure-reducing valve core 7. When the gas pressure exceeds the preload of the spring, the first pressure-reducing valve core 7 will overcome the spring force and move, allowing high-pressure hydrogen to pass through and enter the next level of pressure reduction or output. Two Y-rings are respectively installed at different positions of the first pressure-reducing valve core 7 to provide a sealing effect. Two sliding sleeves are respectively installed on the outside of the first pressure-reducing valve core 7 to guide the movement of the first pressure-reducing valve core 7 and may provide a certain support effect.
[0026] The second pressure-reducing assembly includes a second pressure-reducing valve connecting sleeve 19, which is connected to the first pressure-reducing valve body 1. A connecting sleeve sealing ring 20 is mounted on the outside of the second pressure-reducing valve connecting sleeve 19. A connecting sleeve vent block 21 is connected to the inside of the second pressure-reducing valve connecting sleeve 19. A vent block gasket 22 and a small vent block screw 23 are installed on one side of the connecting sleeve vent block 21. A second pressure-reducing valve spring 18 is installed on the outside of the second pressure-reducing valve core 16. A small second pressure-reducing valve core Y-ring 24 and a 0.4mm spring adjustment gasket 25 are installed on the inside of the second pressure-reducing valve connecting sleeve 19. A large second pressure-reducing valve core Y-ring 17 is installed on the outside of the second pressure-reducing valve core 16. The second pressure-reducing valve connecting sleeve 19 is installed in the second pressure-reducing valve cavity and sealed by the connecting sleeve sealing ring 20. The connecting sleeve vent block 21 is fixed to the second pressure-reducing valve connecting sleeve 19 via threads, and the vent block gasket 22 is fixed to the connecting sleeve vent block 21 via a small vent block screw 23. One end of the second pressure reducing valve core 16 is inserted into the second pressure reducing valve connecting sleeve 19, with the second pressure reducing valve core spring 18 installed in the middle, and one end is installed in the second pressure reducing valve body 15. The second pressure reducing valve body 15 is fixed to the first pressure reducing valve body 1 through a threaded hole. The large Y-ring 17 of the second pressure reducing valve core and the small Y-ring 24 of the second pressure reducing valve core are installed on the second pressure reducing valve core 16. Secondary pressure reduction is performed through the second pressure reducing valve core 16 and the vent block gasket 22, and the hydrogen after secondary pressure reduction flows out from the outlet. Compared with thinner gaskets, the 0.4mm spring adjustment gasket can provide more subtle pressure adjustment capabilities. In a high-pressure environment (such as 70MPA), even small pressure changes may have a significant impact on system performance. Compared with the 0.1mm gasket used for a 35MPa pressure reducing valve, the 0.4mm spring adjustment gasket 25 can ensure that it can operate stably and efficiently in a high-pressure (70MPa) working environment.
[0027] The second pressure reducing valve connecting sleeve 19 and the connecting sleeve vent block 21 are threadedly connected; the threaded connection ensures sealing.
[0028] The relief assembly includes a second relief port connector 27, which is connected to the second pressure reducing valve body 15. One side of the second relief port connector 27 is connected to the first relief port connector 26. Inside the second relief port connector 27, a relief port check valve sleeve 28, a check valve gasket 29, and a check valve spring 30 are installed. Outside the second relief port connector 27, a relief port connector seal ring 31 and a relief port connector gasket 32 are installed. The second pressure reducing valve body 15 is equipped with a relief valve. When the gas pressure is too high after the second stage of pressure reduction, the relief valve opens to reduce the gas pressure in the outlet channel, thereby protecting the components connected to the outlet port. The relief valve consists of the first relief port connector 26, the second relief port connector 27, the relief port check valve sleeve 28, the check valve gasket 29, the check valve spring 30, the relief port connector seal ring 31, and the relief port connector gasket 32. When the gas pressure is within the normal range after the second-stage decompression, the relief valve is in a closed state. At this time, the one-way valve gasket 29, under the action of the one-way valve spring 30, fits tightly on the one-way valve sleeve 28 of the relief port, ensuring that the gas does not leak through the relief port. When the gas pressure after the second-stage decompression is too high, the gas will exert a sufficiently large pressure on the one-way valve gasket 29 to overcome the elastic force of the one-way valve spring 30, causing a gap to form between the one-way valve gasket 29 and the one-way valve sleeve 28 of the relief port. Once a gap is formed between the one-way valve gasket 29 and the one-way valve sleeve 28 of the relief port, the high-pressure gas will pass through this gap, pass through the second relief port joint 27 and the first relief port joint 26 in turn, and finally be discharged into the external environment or connected to a specific discharge channel. In this process, the relief port joint sealing ring 31 and the relief port joint gasket 32 play a sealing role, ensuring that the high-pressure gas is only discharged through the set path and does not leak into other components or the environment.
[0029] The second discharge port joint 27 and the second pressure reducing valve body 15 are threadedly connected, and the second discharge port joint 27 and the first discharge port joint 26 are threadedly connected; the threaded connection ensures sealing.
[0030] A reinforcing rib is provided at the connection between the first pressure reducing valve body 1 and the second pressure reducing valve body 15 ; the reinforcing rib can effectively enhance the structural strength and rigidity of the valve body connection, making the connection between the two valve bodies more stable.
[0031] The reinforcing ribs are spiral and evenly distributed at the junction of the first and second pressure reducing valve bodies 1 and 15. The spiral reinforcing ribs can be integrally formed with the valve body and evenly distributed within the valve body, ensuring adequate reinforcement at every location. The overall structure is more adaptable to a pressure of 70 MPa.
[0032] A muffler is installed on one side of the exhaust connector 13. The interior of the muffler is filled with sound-absorbing material and has multiple small holes. The muffler is typically designed as a cylindrical or box-shaped structure that fits snugly onto the exhaust connector 13, ensuring smooth passage of exhaust air. The muffler is filled with a porous, fibrous, or granular sound-absorbing material, such as fiberglass, asbestos, or foam plastic, which offers excellent sound absorption. The muffler housing is also equipped with multiple, evenly distributed holes to further diffuse and attenuate the exhaust airflow.
[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
Claims
1. A 70MPa hydrogen energy pressure reducing valve, comprising a first pressure reducing valve body (1), characterized in that: One side of the first pressure reducing valve body (1) is connected to a joint assembly, one side of the first pressure reducing valve body (1) is connected to a solenoid valve group (33), the interior of the first pressure reducing valve body (1) is connected to a first pressure reducing valve core (7), one side of the first pressure reducing valve core (7) is connected to a clamping end cover (5), the outer side of the clamping end cover (5) is provided with a clamping end cover sealing ring (6), the outer side of the first pressure reducing valve core (7) is provided with a first pressure reducing assembly, one side of the first pressure reducing valve body (1) is connected to an exhaust joint (13), the outer side of the exhaust joint (13) is connected to an exhaust joint O-ring (14), one side of the first pressure reducing valve body (1) is provided with a second pressure reducing assembly, the interior of the second pressure reducing assembly is connected to a second pressure reducing valve core (16), the outer side of the second pressure reducing assembly is connected to a second pressure reducing valve body (15), one side of the second pressure reducing valve body (15) is connected to a discharge assembly, and one side of the second pressure reducing valve body (15) is connected to a pressure sensor interface (34).
2. A 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: The joint assembly comprises an air inlet joint (2), the air inlet joint (2) being connected to a first pressure reducing valve body (1), one end of the air inlet joint (2) being sleeved with a first air inlet sealing ring (3), the other end of the air inlet joint (2) being sleeved with a second air inlet sealing ring (4), and one side of the air inlet joint (2) being provided with a thread.
3. A 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: The first pressure reducing assembly comprises a first pressure reducing valve connecting sleeve, the first pressure reducing valve connecting sleeve being connected to the outside of a first pressure reducing valve core (7), and the outside of the first pressure reducing valve core (7) being provided with a first pressure reducing valve core large Y-shaped ring (8), a first pressure reducing valve core large sliding sleeve (9), a first pressure reducing valve core spring (10), a first pressure reducing valve core small sliding sleeve (12) and a first pressure reducing valve core small Y-shaped ring (11).
4. A 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: The second pressure reducing assembly comprises a second pressure reducing valve connecting sleeve (19), the second pressure reducing valve connecting sleeve (19) is connected to the first pressure reducing valve body (1), the outer side of the second pressure reducing valve connecting sleeve (19) is provided with a connecting sleeve sealing ring (20), the interior of the second pressure reducing valve connecting sleeve (19) is connected with a connecting sleeve ventilation block (21), one side of the connecting sleeve ventilation block (21) is provided with a ventilation block gasket (22) and a ventilation block small screw (23), the outer side of the second pressure reducing valve core (16) is provided with a second pressure reducing valve core spring (18), the inner side of the second pressure reducing valve connecting sleeve (19) is provided with a second pressure reducing valve core small Y-ring (24) and a 0.4mm spring adjustment gasket (25), and the outer side of the second pressure reducing valve core (16) is provided with a second pressure reducing valve core large Y-ring (17).
5. A 70MPa hydrogen energy pressure reducing valve according to claim 4, characterized in that: The second pressure reducing valve connecting sleeve (19) and the connecting sleeve vent block (21) are threadedly connected.
6. The 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: The discharge assembly comprises a second discharge port joint (27), the second discharge port joint (27) being connected to the second pressure reducing valve body (15), one side of the second discharge port joint (27) being connected to the first discharge port joint (26), the interior of the second discharge port joint (27) being provided with a discharge port one-way valve sleeve (28), a one-way valve gasket (29) and a one-way valve spring (30), and the outer side of the second discharge port joint (27) being provided with a discharge port joint sealing ring (31) and a discharge port joint gasket (32).
7. A 70MPa hydrogen energy pressure reducing valve according to claim 6, characterized in that: The second discharge port connector (27) and the second pressure reducing valve body (15) are threadedly connected, and the second discharge port connector (27) and the first discharge port connector (26) are threadedly connected.
8. The 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: A reinforcing rib is provided at the connection between the first pressure reducing valve body (1) and the second pressure reducing valve body (15).
9. A 70MPa hydrogen energy pressure reducing valve according to claim 8, characterized in that: The reinforcing ribs are spiral-shaped and evenly distributed at the connection between the first pressure reducing valve body (1) and the second pressure reducing valve body (15).
10. The 70MPa hydrogen energy pressure reducing valve according to claim 1, characterized in that: A muffler is provided on one side of the exhaust joint (13), the interior of the muffler is filled with sound-absorbing material, and a plurality of small holes are provided on the muffler.