Gas pressure regulating valve for vehicle

Abstract

The present application relates to pressure regulating valve technical field, especially to a kind of output pressure on-line adjustment vehicle gas pressure regulating valve, including main casing, the two ends of main casing are connected with gas inlet connector and gas outlet connector respectively, the pressure reducing structure is arranged between gas inlet connector and gas outlet connector in main casing, the pressure reducing structure close to the side of gas outlet connector includes valve seat, pressure reducing spring, valve core, relatively independent gas outlet hole and pressure adjusting mechanism are respectively arranged on the gas outlet connector, the pressure adjusting mechanism is arranged in the end of gas outlet connector away from main casing and is sealingly connected with gas outlet connector, the pressure regulating mechanism includes adjusting rod, pressure regulating spring, one end of adjusting rod is inserted into gas outlet connector, the pressure regulating spring is arranged in gas outlet connector and is supported between valve core and adjusting rod, the compression amount of pressure regulating spring can be adjusted by adjusting rod for adjusting final gas outlet pressure, effectively solve the technical problems of inconvenient adjustment of output pressure of vehicle pressure reducing valve in prior art.

Description

Technical Field

[0001] This invention relates to the field of pressure regulating valve technology, and in particular to a vehicle gas pressure regulating valve for online output pressure adjustment. Background Technology

[0002] The power supply principle of hydrogen fuel cell vehicles is as follows: First, hydrogen from the hydrogen storage system needs to be supplied to the fuel cell. Hydrogen and oxygen undergo a chemical reaction in the fuel cell to produce electricity. The electricity drives the vehicle's motor, which transmits torque to the drive wheels through the power transmission mechanism, thereby driving the vehicle. However, the pressure of the hydrogen storage system is greater than the pressure required for the fuel cell to supply hydrogen. Therefore, the hydrogen from the storage system needs to be depressurized during the process of supplying hydrogen to the fuel cell. This depressurization is usually achieved using a pressure reducing valve.

[0003] Existing pressure-reducing valves, such as the Chinese invention patent application CN114776859A published on July 22, 2022, disclose an adjustable output pressure automotive pressure-reducing valve, which is a two-stage pressure-reducing valve. It includes a main housing with a pressure-reducing valve outlet. A pressure-reducing structure is located inside the main housing at the inner end of the outlet. The pressure-reducing structure includes a valve core, a valve core connector, and a valve seat, all coaxially arranged with the outlet. The outlet has a threaded section with a push-fit seat threadedly connected to it. An axial through-channel is located at the center of the push-fit seat. The automotive pressure-reducing valve also includes an elastic support structure supported between the push-fit seat and the valve core, with an airflow channel at the elastic support structure. The push-fit seat has a torque transmission structure for a tool inserted through the outlet to adjust the compression of the elastic support structure.

[0004] The pressure reducing valve disclosed in the previous patent document cannot be adjusted while in use. The connection of the vent hole needs to be disconnected, and the pipeline needs to be reconnected after the pressure is adjusted, which makes the pressure adjustment operation cumbersome and inconvenient. Summary of the Invention

[0005] The purpose of this invention is to provide an automotive gas pressure regulating valve with online output pressure adjustment, in order to solve the technical problem that the output pressure of existing automotive pressure reducing valves is inconvenient to adjust.

[0006] To solve the above-mentioned technical problems, the present invention provides an online output pressure adjustment vehicle gas pressure regulating valve with the following technical solution: an online output pressure adjustment vehicle gas pressure regulating valve, comprising a main housing, with an inlet connector and an outlet connector respectively connected to both ends of the main housing. A pressure reducing structure is provided inside the main housing between the inlet connector and the outlet connector. The pressure reducing structure near the outlet connector includes a valve seat, a pressure reducing spring, and a valve core. The outlet connector is provided with relatively independent outlet holes and a pressure adjusting mechanism. The pressure adjusting mechanism is located at the end of the outlet connector away from the main housing and is sealed to the outlet connector. The pressure adjusting mechanism includes an adjusting rod and a pressure adjusting spring. One end of the adjusting rod extends into the outlet connector. The pressure adjusting spring is located inside the outlet connector and supports the valve core and the adjusting rod. The adjusting rod can adjust the compression of the pressure adjusting spring to adjust the final outlet pressure.

[0007] Beneficial effects: Firstly, by setting the air outlet and pressure adjustment mechanism relatively independently, and by sealing the pressure adjustment mechanism with the air outlet connector, it is possible to adjust the output pressure without interrupting the air supply. In use, the air outlet is directly connected to the subsequent pipeline. When adjusting the air outlet pressure, the compression of the pressure adjusting spring can be adjusted directly by operating the adjustment rod, thereby adjusting the gap between the valve core and the valve seat, and finally achieving the purpose of adjusting the air outlet pressure. There is no need to disconnect the pipeline connected to the air outlet, making the adjustment of the output pressure very convenient.

[0008] As a further optimized technical solution, a gas buffer chamber is provided inside the gas outlet connector, one end of the adjusting rod extends into the gas buffer chamber and presses the pressure adjusting spring, and the gas outlet is connected to the gas buffer chamber.

[0009] Beneficial effects: In order to reduce product flow resistance and ensure that the airflow is depressurized in the DC channel, the pressure reducing structure is arranged in a straight line along the axial direction of the main shell, and a gas buffer chamber is set after the pressure reduction is completed. In order to ensure that the gas can be directly delivered out, the gas outlet is connected to the buffer chamber to facilitate the direct delivery of the depressurized gas.

[0010] As a further optimized technical solution, the adjusting rod is threadedly connected to the air outlet connector.

[0011] Beneficial effects: The threaded connection allows for continuous adjustment of the amount of the adjusting rod extending into the buffer chamber, thereby facilitating the adjustment of the output airflow pressure.

[0012] As a further optimized technical solution, a pushing block is provided between the pressure regulating spring and the adjusting rod. A first limiting structure is provided on the side of the pushing block near the pressure regulating spring, and a second limiting structure is provided on the side of the pushing block near the adjusting rod. The pressure regulating spring is fixedly connected to the first limiting structure, and the adjusting rod is rotatably connected to the second limiting structure.

[0013] Beneficial effects: By setting up a push block, the pressure regulating spring can be prevented from twisting during compression. The first limiting structure fixes the pressure regulating spring, preventing displacement between the spring and the push block during compression, which would affect the smooth compression of the spring. The function of the second limiting structure is to prevent relative displacement between the adjusting rod and the push block when they are rotatably connected, thus preventing the push block from being evenly stressed axially and affecting its smooth forward movement.

[0014] As a further optimized technical solution, the pushing block is in sliding sealing cooperation with the inner wall of the gas buffer chamber.

[0015] Beneficial effect: The purpose of sealing the push block with the gas buffer chamber is to prevent leakage from the gas buffer chamber during the pressure regulation process.

[0016] As a further optimized technical solution, an elastic seal is provided between the push block and the gas buffer chamber, and an annular groove is provided on the push block, with the elastic seal being engaged in the annular groove.

[0017] Beneficial effects: By setting an elastic seal, the push block and the gas buffer chamber are sealed, preventing gas leakage in the buffer chamber. At the same time, by setting an annular groove and fixing the elastic seal in the annular groove, the elastic seal is effectively prevented from falling off during the sliding contact between the push block and the gas buffer chamber.

[0018] As a further optimized technical solution, the adjusting rod is connected to the air outlet connector via a fixing nut, the fixing nut is fixedly connected to the air outlet connector, and the adjusting rod is threadedly connected to the fixing nut.

[0019] Beneficial effects: By setting a fixing nut, the threads on the air outlet connector are avoided. At the same time, a separate assembly station for the adjusting rod and the fixing nut can be set during assembly. After the adjusting rod and the fixing nut are assembled, they can be directly assembled onto the air outlet connector, thereby improving processing and assembly efficiency.

[0020] As a further optimized technical solution, an anti-loosening nut is provided on the outside of the adjusting rod, and the anti-loosening nut is threadedly connected to the adjusting rod and presses against the air outlet connector.

[0021] Beneficial effects: In order to ensure a constant output pressure at the outlet, after adjusting the output pressure with the adjusting rod, it is necessary to ensure that the position of the adjusting rod is fixed. Due to unavoidable mechanical vibrations during use, the adjusting rod cannot be guaranteed to remain in place simply by being threaded to the outlet connector. To prevent the output gas pressure from changing due to the adjusting rod becoming loose, an anti-loosening nut is installed on the outside of the adjusting rod.

[0022] As a further optimized technical solution, an elastic washer is also fitted on the adjusting rod, and the anti-loosening nut presses the elastic washer.

[0023] Beneficial effect: By setting an elastic washer, the anti-loosening nut can be radially pressed against the adjusting rod, thereby effectively enhancing the anti-loosening effect of the anti-loosening nut.

[0024] As a further optimized technical solution, a torque transmission structure is provided at the end of the adjusting rod away from the air outlet connector.

[0025] Beneficial effect: In order to facilitate the rotation of the adjusting rod to extend into or out of the gas buffer chamber, a torque transmission structure is set at one end of the adjusting rod. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the internal structure of the main housing for pressure reduction in this invention.

[0027] In the diagram: 1. Main housing; 2. Air inlet connector; 21. Air inlet hole; 3. Air outlet connector; 4. Valve seat; 5. Pressure reducing spring; 6. Valve core; 7. Air outlet hole; 8. Adjusting rod; 9. Pressure regulating spring; 10. Gas buffer chamber; 11. Push block; 12. Elastic seal; 13. Fixing nut; 14. Anti-loosening nut; 15. Elastic washer; 16. Torque transmission structure; 101. First valve seat; 102. First valve core; 103. First pressure reducing spring; 104. Filter element. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described embodiments are merely some embodiments of the invention, and not all embodiments. The components of the embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0030] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0032] Example 1

[0033] like Figure 1 As shown, the pressure reducing valve includes a main housing 1, with an inlet connector 2 and an outlet connector 3 connected to its two ends respectively. The inlet connector 2 has an inlet hole 21 along the axial direction. A two-stage pressure reducing structure is provided between the inlet connector 2 and the outlet connector 3 inside the main housing 1. The two-stage pressure reducing structure is arranged linearly along the axial direction of the main housing 1. The first-stage pressure reducing structure includes a first valve seat 101, a first valve core 102, and a first pressure reducing spring 103. The second-stage pressure reducing structure includes a valve core 6, a valve seat 4, and a pressure reducing spring 5. A filter element 104 is also provided inside the inlet hole 21 to filter impurities in the high-pressure gas. The second-stage pressure reducing structure is close to the outlet connector 3. A gas buffer chamber 10 is provided inside the outlet connector 3. The outlet hole 7 is connected to the gas buffer chamber 10 to discharge the depressurized gas. An outlet hole 7 and a pressure adjustment mechanism are respectively and independently provided on the outlet connector 3. The function is to realize pressure adjustment at any time without disassembling any connected parts, making the pressure adjustment operation very convenient.

[0034] In order to ensure that the output pressure can be adjusted without interrupting the gas supply, the pressure adjustment mechanism and the gas outlet connector 3 must be sealed. The pressure adjustment mechanism includes an adjustment rod 8 and a pressure regulating spring 9. One end of the adjustment rod 8 extends into the gas buffer chamber 10 inside the gas outlet connector 3. The pressure regulating spring 9 is set in the gas buffer chamber 10 and supports the valve core 6 and the adjustment rod 8. The adjustment rod 8 can adjust the gas outlet pressure by adjusting the compression of the pressure regulating spring 9. In order to facilitate continuous adjustment of the extension of the adjustment rod 8 into the buffer chamber 10, the adjustment rod 8 is preferably threadedly connected to the gas outlet connector 3.

[0035] In this embodiment, if the adjusting rod 8 is in direct contact with the pressure regulating spring 9, and the adjusting rod 8 increases its insertion amount into the gas buffer chamber 10 by rotation, the adjusting rod 8 will inevitably cause the pressure regulating spring 9 to twist. To prevent the pressure regulating spring 9 from twisting during the adjustment of the compression amount and to ensure that it is compressed in a balanced manner, a pushing block 11 is provided between the pressure regulating spring 9 and the adjusting rod 8. A first limiting structure is provided on the side of the pushing block 11 near the pressure regulating spring 9, and a second limiting structure is provided on the side of the pushing block 11 near the adjusting rod 8. The pressure regulating spring 9 is fixedly connected to the first limiting structure. The rod 8 is rotatably connected to the second limiting structure. The function of the first limiting structure is to fix the pressure adjusting spring 9 and prevent the pressure adjusting spring 9 from shifting between itself and the push block 11 during compression, which would affect the smooth compression of the pressure adjusting spring 9. The first limiting structure can be a boss or a groove. The function of the second limiting structure is to prevent relative displacement between the adjusting rod 8 and the push block 11 when they are rotatably connected, so that the push block 11 cannot be uniformly stressed axially, which would affect the smooth forward movement of the push block 11. The second limiting structure is a circular groove, and the diameter of the circular groove is adapted to the outer diameter of the adjusting rod 8.

[0036] To prevent leakage from the gas buffer chamber during pressure regulation, the push block 11 is slidably sealed to the inner wall of the gas buffer chamber 10. Specifically, an elastic seal 12 is provided between the push block 11 and the gas buffer chamber 10, preferably a rubber sealing ring. An annular groove is provided on the push block 11, and the elastic seal 12 is engaged in the annular groove, which can effectively prevent the elastic seal 12 from falling off during the sliding engagement between the push block 11 and the gas buffer chamber 10.

[0037] In this embodiment, an anti-loosening nut 14 is provided on the outside of the adjustment rod 8, and the adjustment rod 8 is connected to the air outlet connector 3 through a fixing nut 13. The fixing nut 13 is fixedly connected to the air outlet connector 3, and the adjustment rod 8 is threadedly connected to the fixing nut 13.

[0038] To ensure a constant output pressure from the air outlet 7, the position of the adjusting rod 8 must be kept constant after the output pressure is adjusted by the adjusting rod 8. This is unavoidable during use.

[0039] Due to various mechanical vibrations and other reasons, the adjustment rod 8 cannot be guaranteed to remain in place simply by being threaded to the air outlet connector 3. In order to prevent the pressure of the output gas from changing after the adjustment rod 8 becomes loose, an anti-loosening nut 14 is provided on the outside of the adjustment rod 8. The anti-loosening nut 14 is threaded to the adjustment rod 8 and presses against the air outlet connector 3. In order to further enhance the anti-loosening effect of the anti-loosening nut 14, an elastic washer 15 is also fitted on the adjustment rod 8. The anti-loosening nut 14 presses against the elastic washer 15.

[0040] To facilitate the rotation and turning of the adjusting rod 8, a torque transmission structure 16 is provided at the end of the adjusting rod 8 away from the air outlet connector 3. The torque transmission structure 16 can be a regular hexagonal groove that can cooperate with a hexagonal wrench, or it can be a protrusion that can cooperate with a torque wrench.

[0041] Working principle: High-pressure gas enters this pressure reducing valve through the air inlet of the air inlet connector. Impurities in the high-pressure gas are filtered through the filter element. The high-pressure gas passes through the first valve seat. Under the combined action of the first valve seat and the first valve core, the first stage of pressure regulation is completed. At this time, the high-pressure gas is converted into medium-pressure gas and flows through the inner channel of the first valve core to the second-stage chamber (i.e., the space between the end of the first valve core and the valve seat). The medium-pressure gas enters the second-stage pressure reducing structure through the through hole on the valve seat. Under the combined action of the valve core and the valve seat, the pressure is regulated from medium pressure to low pressure and then output from the gas buffer chamber. The low-pressure gas enters the downstream through the air outlet on the air outlet connector.

[0042] When pressure adjustment is required, use an appropriate tool such as a hex wrench to turn the adjusting rod clockwise to push the valve core forward, thereby compressing the pressure regulating spring and increasing the reverse thrust of the valve core, bringing the valve core closer to the valve seat, thereby reducing the output pressure; conversely, turn the adjusting rod clockwise to increase the output pressure of the pressure regulating valve.

[0043] Example 2

[0044] The difference between this embodiment and Embodiment 1 is that, in Embodiment 1, a push block 11 is provided between the adjusting rod 8 and the pressure regulating spring 9, while in this embodiment, the push block 11 is not provided, and the adjusting rod 8 directly contacts the pressure regulating spring 9. The diameter of the pressure regulating spring 9 needs to be smaller than the diameter of the adjusting rod 8, and the adjusting rod 8 directly pushes the pressure regulating spring 9. In this embodiment, a limiting groove can also be provided at the end of the adjusting rod, and the end of the pressure regulating spring 9 that contacts the adjusting rod 8 is set in the limiting groove and rotatably connected to the adjusting rod 8.

[0045] Example 3

[0046] The difference between this implementation and Example 1 is that in Example 1, the adjusting rod 8 is connected to the air outlet connector 3 through the fixing nut 13. In this implementation, the fixing nut 13 is not provided, and the adjusting rod 8 is directly threaded to the air outlet connector 3.

[0047] Example 4

[0048] The difference between this embodiment and Example 1 is that in Example 1, the anti-loosening effect of the anti-loosening nut 14 is further enhanced by setting an elastic washer 15. In this embodiment, the elastic washer 15 may not be set.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A vehicle gas pressure regulating valve with online output pressure adjustment, comprising a main housing (1), with an inlet connector (2) and an outlet connector (3) respectively connected to both ends of the main housing (1), wherein a pressure reducing structure is provided inside the main housing (1) between the inlet connector (2) and the outlet connector (3), and the pressure reducing structure near the outlet connector (3) includes a valve seat (4), a pressure reducing spring (5), and a valve core (6), characterized in that, The air outlet connector (3) is provided with a relatively independent air outlet hole (7) and a pressure adjustment mechanism. The pressure adjustment mechanism is located at the end of the air outlet connector (3) away from the main housing (1) and is sealed to the air outlet connector (3). The pressure adjustment mechanism includes an adjustment rod (8) and a pressure regulating spring (9). One end of the adjustment rod (8) extends into the air outlet connector (3). The pressure regulating spring (9) is located inside the air outlet connector (3) and supports between the valve core (6) and the adjustment rod (8). The adjustment rod (8) can adjust the compression of the pressure regulating spring (9) to adjust the final air outlet pressure. A push block (11) is provided between the pressure regulating spring (9) and the adjustment rod (8). The push block (11) is provided with a first limiting structure on the side near the pressure regulating spring (9) and a second limiting structure on the side near the adjustment rod (8). The pressure regulating spring (9) is limited and cooperated with the boss or groove of the first limiting structure. The adjustment rod (8) is rotated and cooperated with the second limiting structure.

2. The online output pressure adjustment vehicle gas pressure regulating valve according to claim 1, characterized in that, The gas outlet connector (3) is provided with a gas buffer chamber (10), one end of the adjusting rod (8) extends into the gas buffer chamber (10) and presses the pressure regulating spring (9), and the gas outlet (7) is connected to the gas buffer chamber (10).

3. The online output pressure adjustment vehicle gas pressure regulating valve according to claim 1 or 2, characterized in that, The adjusting rod (8) is threadedly connected to the air outlet connector (3).

4. The online output pressure adjustment vehicle gas pressure regulating valve according to claim 1 or 2, characterized in that, The push block (11) slides and seals against the inner wall of the gas buffer chamber (10).

5. The automotive gas pressure regulating valve with online output pressure adjustment according to claim 4, characterized in that, An elastic seal (12) is provided between the push block (11) and the gas buffer chamber (10). An annular groove is provided on the push block (11), and the elastic seal (12) is engaged in the annular groove.

6. The automotive gas pressure regulating valve with online output pressure adjustment according to claim 3, characterized in that, The adjusting rod (8) is connected to the air outlet connector (3) by a fixing nut (13). The fixing nut (13) is fixedly connected to the air outlet connector (3), and the adjusting rod (8) is threadedly connected to the fixing nut (13).

7. The online output pressure adjustment vehicle gas pressure regulating valve according to claim 6, characterized in that, An anti-loosening nut (14) is provided on the outside of the adjusting rod (8). The anti-loosening nut (14) is threadedly connected to the adjusting rod (8) and presses against the air outlet connector (3).

8. The automotive gas pressure regulating valve with online output pressure adjustment according to claim 7, characterized in that, An elastic washer (15) is also fitted on the adjusting rod (8), and the anti-loosening nut (14) presses the elastic washer (15).

9. The automotive gas pressure regulating valve with online output pressure adjustment according to claim 6, characterized in that, A torque transmission structure (16) is provided at the end of the adjusting rod (8) away from the air outlet (3).

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