Miniaturized quick-release hydrogen pressure reducing valve for gas filling

Abstract

The utility model discloses a miniaturized quick release type hydrogen pressure reducing valve for gas filling, which relates to the field of hydrogen energy valves and comprises a left valve body and a right valve body which are in threaded connection, a first cavity is arranged at one end of the right valve body close to the left valve body, a second valve core is in clearance fit in the first cavity, and a second spring is arranged between the second valve core and the right valve body. A first valve element is connected between the left valve body and the right valve body in a pressing mode, a second cavity is formed between the first valve element and the second valve element, a third cavity is formed in the end, close to the right valve body, of the left valve body, a third valve element is arranged in the third cavity in a clearance fit mode, and a first spring is arranged between the third valve element and the first valve element. A fourth cavity is formed between the third valve element and the left valve body, a high-pressure inlet is formed in the end, away from the left valve body, of the right valve body, and an outlet is formed in the end, away from the right valve body, of the left valve body, so that the product cost is reduced, and the product weight is reduced; and moreover, the allowable air pressure range of an inlet is larger, the gas filling speed is higher, and filling cut-off is more sensitive.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen energy valve technology, specifically a miniaturized quick-release hydrogen pressure reducing valve for refueling. Background Technology

[0002] Hydrogen valves are devices that regulate, control, and guide the flow of hydrogen. They are mainly used in on-board hydrogen storage / supply systems, fuel cell power systems, and hydrogen production, storage, transportation, and refueling systems. Depending on their function, hydrogen valves can be categorized as hydrogen safety valves, hydrogen shut-off valves, and hydrogen pressure reducing valves. This particular valve belongs to the category of hydrogen pressure reducing valves. Pressure reducing valves are pressure control devices used in high-pressure gas pipeline systems. Their output value directly affects the operating status of downstream equipment. Existing small, quick-release hydrogen pressure reducing valves have complex structures, high precision requirements, and low yield rates. Furthermore, the components of pressure reducing valves are often made of copper or stainless steel, resulting in heavy products and high production costs. Utility Model Content

[0003] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a miniaturized quick-release hydrogen pressure reducing valve for refueling, so as to solve the shortcomings of the prior art.

[0004] The purpose of this utility model is achieved through the following technical solution: a miniaturized quick-release hydrogen pressure reducing valve for refueling, comprising a threaded left valve body and a right valve body, a second valve core with a clearance fit inside the right valve body, a first chamber formed between the second valve core and the right valve body, a second spring disposed between the second valve core and the right valve body, a first valve core pressed between the left valve body and the right valve body, a second chamber formed between the first valve core and the second valve core, a third valve core with a clearance fit inside the left valve body, a first spring disposed between the third valve core and the first valve core, a third chamber formed between the first valve core and the third valve core, a fourth chamber formed between the third valve core and the left valve body, a high-pressure inlet at the end of the right valve body away from the left valve body, and an outlet at the end of the left valve body away from the right valve body.

[0005] Furthermore, the right valve body has an inner hole that communicates with the first chamber, and the right valve body has an air passage groove on its thread, the air passage groove communicating with the inner hole.

[0006] Furthermore, a first rubber pad is fixed to one end of the second valve core near the inner hole, and the inner hole is located on the movement path of the first rubber pad.

[0007] Furthermore, the first valve core has a through-hole for cutting off air flow, and the third valve core has a second rubber pad fixed at one end near the through-hole for cutting off air flow. The through-hole for cutting off air flow is located on the moving path of the second rubber pad, and the second valve core has air holes on both sides of the through-hole for cutting off air flow.

[0008] Furthermore, the third valve core has an assembly groove at one end near the first valve core, the end of the first valve core away from the second valve core is assembled in the assembly groove, a third sealing ring is provided between the outer wall of the first valve core and the inner wall of the assembly groove, the second rubber pad is disposed in the assembly groove, and the third valve core has lateral air holes through both sides of the second rubber pad.

[0009] Furthermore, two sixth sealing rings are installed inside the high-pressure inlet of the right valve body.

[0010] Furthermore, a first locking nut is threaded onto the end of the right valve body away from the left valve body, a second sealing ring is provided between the first locking nut and the right valve body, and a positioning pin is provided on the first locking nut.

[0011] Furthermore, a second locking nut is threaded onto the end of the left valve body furthest from the right valve body.

[0012] Furthermore, a first sealing ring is provided between the first valve core and the right valve body, a fifth sealing ring is provided between the third valve core and the inner wall of the left valve body, and a fourth sealing ring is provided between the second valve core and the inner wall of the right valve body.

[0013] The beneficial effects of this utility model are:

[0014] It reduces product costs and weight; and has a wider inlet pressure range, faster filling rate, and more sensitive filling cut-off. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of a miniaturized quick-release hydrogen pressure reducing valve for refueling according to this utility model;

[0016] Figure 2 This is a schematic diagram showing the hydrogen flow path of a miniaturized quick-release hydrogen pressure reducing valve for refueling according to this utility model.

[0017] Figure 3 This is a schematic diagram of the force application of a miniaturized quick-release hydrogen pressure reducing valve for refueling according to this utility model.

[0018] In the diagram, 1-positioning pin, 2-left valve body, 3-right valve body, 4-first valve core, 5-second valve core, 6-third valve core, 7-first locking nut, 8-second locking nut, 9-first rubber pad, 10-first sealing ring, 11-second sealing ring, 12-third sealing ring, 13-fourth sealing ring, 14-fifth sealing ring, 16-second rubber pad, 17-first spring, 18-second spring, 19-sixth sealing ring, 20-air duct, 21-first chamber, 22-second chamber, 23-third chamber, 24-fourth chamber. Detailed Implementation

[0019] Example 1

[0020] like Figures 1 to 3 As shown, a miniaturized quick-release hydrogen pressure reducing valve for refueling includes a threaded left valve body 2 and a right valve body 3. A second valve core 5 is fitted inside the right valve body 3 with a clearance, forming a first chamber 21 between the second valve core 5 and the right valve body 3. A second spring 18 is disposed between the second valve core 5 and the right valve body 3. A first valve core 4 is pressed between the left valve body 2 and the right valve body 3, forming a second chamber 22 between the first valve core 4 and the second valve core 5. A third valve core 6 is fitted inside the left valve body 2 with a clearance, forming a first spring 17 between the third valve core 6 and the first valve core 4. A third chamber 23 is formed between the first valve core 4 and the third valve core 6. A fourth chamber 24 is formed between the third valve core 6 and the left valve body 2. The right valve body 3 is located away from the left valve body 2. One end of the valve body 2 has a high-pressure inlet, and the end of the left valve body 2 away from the right valve body 3 has an outlet. The right valve body 3 has an inner hole that connects to the first chamber 21. The right valve body 3 has a gas passage groove on its thread, which connects to the inner hole. Hydrogen gas enters the first chamber 22 between the right valve body 3 and the second valve core 5 through the high-pressure inlet and the gas passage groove. It then flows into the second chamber 22 through the hole on the second valve core 5, into the third chamber 23 between the first valve core 4 and the third valve core 6 through the hole on the first valve core 4, into the fourth chamber 24 through the hole on the third valve core 6, and finally flows into the low-pressure container through the outlet on the left valve body 2. The structure is simple and the product weight is reduced. The pressure reducing valve is made of one of the following materials: titanium alloy, aluminum alloy, or stainless steel.

[0021] Example 2

[0022] Based on Embodiment 1, two sixth sealing rings 19 are installed inside the high-pressure inlet of the right valve body 3. A first locking nut 7 is threaded onto the end of the right valve body 3 away from the left valve body 2. A second sealing ring 11 is provided between the first locking nut 7 and the right valve body 3. A positioning pin 1 is provided on the first locking nut 7. The high-pressure inlet of the right valve body 3 is connected to the pipeline of the hydrogen supply system through the second locking nut 7. The sealing performance of the connection is improved by the sixth sealing rings 19.

[0023] Example 3

[0024] Based on Embodiment 2, a second locking nut 8 is threaded onto the end of the left valve body 2 away from the right valve body 3, and the outlet of the left valve body 2 is connected to the pipeline of the low-pressure vessel through the second locking nut 8.

[0025] Example 4

[0026] Based on Example 3, such as Figures 1 to 3 As shown, a first rubber pad 9 is fixed to one end of the second valve core 5 near its inner hole, and the inner hole is located on the moving path of the first rubber pad 9. A choking vent 20 is formed through the center of the first valve core 4. A second rubber pad 16 is fixed to one end of the third valve core 6 near its choking vent 20, and the choking vent 20 is located on the moving path of the second rubber pad 16. Vents are formed on both sides of the choking vent 20 on the second valve core 5. An assembly groove is formed on one end of the third valve core 6 near the first valve core 4. The first valve core 4 is located away from the first... One end of the second valve core 5 is fitted into the assembly groove. A third sealing ring 12 is provided between the outer wall of the first valve core 4 and the inner wall of the assembly groove. The second rubber gasket 16 is placed in the assembly groove. The third valve core 6 has lateral air holes through both sides of the second rubber gasket 16. The second valve core 5, the second spring 18, and the right valve body 3 perform the main pressure regulating function, which is a first-stage pressure reduction. The closer the inner hole on the right valve body 3 is to the second valve core 5, the greater the pressure reduction ratio. Initially, the second spring 18 provides a force to the left to the second valve core 5. When hydrogen flows through, a pressure difference F2 is generated to the right between the second chamber and the first chamber. The greater the inlet pressure, the greater F2. When F2 is greater than F1, the second spring 18 is compressed, and the second valve core 5 moves to the right. The closer the inner hole on the right valve body 3 is to the first rubber pad 9, the greater the pressure reduction ratio and the smaller the outlet pressure, achieving dynamic pressure reduction. The third valve core 6, the first spring 17, and the first valve core 4 perform pressure reduction and shut-off functions, forming a two-stage pressure reduction system with automatic shut-off. Initially, the first spring 17 applies a force to the left to the third valve core 6. When hydrogen flows through, a pressure difference to the right is generated between the third chamber and the fourth chamber. The greater the inlet pressure, the greater this pressure difference. When the pressure difference is greater than the force to the left, the first spring 17 is compressed, and the third valve core 6 moves closer to the first valve core 4, causing the second rubber pad 16 to move closer to the choke hole 20. The pressure reduction ratio increases, and the outlet pressure decreases. When the second rubber pad 16 contacts the first valve core 4, the second rubber pad 16 blocks the choke hole 20, achieving the shut-off effect.

[0027] Example 5

[0028] Based on Embodiment 4, a first sealing ring 10 is provided between the first valve core 4 and the right valve body 3 to improve the sealing performance of the assembly position of the first valve core 4 and the right valve core 3; a fifth sealing ring 14 is provided between the third valve core 6 and the inner wall of the left valve body 2 to improve the sealing performance of the assembly position of the third valve core 6 and the left valve body 2; and a fourth sealing ring 13 is provided between the second valve core 5 and the inner wall of the right valve body 3 to improve the sealing performance of the assembly position of the second valve core 5 and the right valve body 3.

Claims

1. A miniaturized quick-release hydrogen pressure-reducing valve for gas filling, comprising a left valve body (2) and a right valve body (3) connected by screwing, characterized in that, The right valve body (3) is interstitially fitted with a second valve core (5), a first chamber (21) is formed between the second valve core (5) and the right valve body (3), a second spring (18) is arranged between the second valve core (5) and the right valve body (3), the left valve body (2) is pressure-bonded with the right valve body (3), a first valve core (4) is arranged between the left valve body (2) and the right valve body (3), a second chamber (22) is formed between the first valve core (4) and the second valve core (5), the left valve body (2) is interstitially fitted with a third valve core (6), a first spring (17) is arranged between the third valve core (6) and the first valve core (4), a third chamber (23) is formed between the first valve core (4) and the third valve core (6), a fourth chamber (24) is formed between the third valve core (6) and the left valve body (2), a high-pressure inlet is formed at one end of the right valve body (3) away from the left valve body (2), and an outlet is formed at one end of the left valve body (2) away from the right valve body (3).

2. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 1, characterized in that, An inner hole communicating with the first chamber is formed in the right valve body (3), and an air passage is arranged on the threads of the right valve body (3) and communicates with the inner hole.

3. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 2, characterized in that, A first rubber pad (9) is fixed to one end of the second valve core (5) close to the inner hole, and the inner hole is located on the movement path of the first rubber pad (9).

4. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 3, characterized in that, A cut-off air hole (20) is formed in the center of the first valve core (4), a second rubber pad (16) is fixed to one end of the third valve core (6) close to the cut-off air hole (20), the cut-off air hole (20) is located on the movement path of the second rubber pad (16), and air holes are formed on both sides of the cut-off air hole (20) on the second valve core (5).

5. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 4, characterized in that, An assembly groove is formed at one end of the third valve core (6) close to the first valve core (4), the first valve core (4) is assembled in the assembly groove away from the second valve core (5), a third sealing ring (12) is arranged between the outer wall of the first valve core (4) and the inner wall of the assembly groove, the second rubber pad (16) is arranged in the assembly groove, and lateral air holes are formed in the third valve core (6) on both sides of the second rubber pad (16).

6. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 1, characterized in that, Two sixth sealing rings (19) are arranged in the high-pressure inlet of the right valve body (3).

7. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 1, characterized in that, A first locking nut (7) is threadedly sleeved at one end of the right valve body (3) away from the left valve body (2), a second sealing ring (11) is arranged between the first locking nut (7) and the right valve body (3), and a positioning pin (1) is arranged on the first locking nut (7).

8. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 1, characterized in that, A second locking nut (8) is threadedly sleeved at one end of the left valve body (2) away from the right valve body (3).

9. The miniaturized quick-release hydrogen pressure-reducing valve for gas filling according to claim 1, characterized in that, A first sealing ring (10) is arranged between the first valve core (4) and the right valve body (3), a fifth sealing ring (14) is arranged between the third valve core (6) and the inner wall of the left valve body (2), and a fourth sealing ring (13) is arranged between the second valve core (5) and the inner wall of the right valve body (3).

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