Pressure limiting valve, seat adjusting system and vehicle

Abstract

The utility model relates to a pressure limiting valve which comprises a valve body provided with a pressure stabilizing cavity. The diaphragm can be axially arranged in the valve body in a reciprocating mode, a drainage cavity communicated with the pressure stabilizing cavity is defined by the diaphragm and the valve body, and an air leakage hole used for being communicated with the drainage cavity is formed in the diaphragm; the valve element comprises a valve rod used for opening or closing the air leakage hole, and the valve rod and the drainage cavity are both located on the same side of the diaphragm. The first end of the first elastic piece abuts against the side, away from the drainage cavity, of the diaphragm, and the first elastic piece provides elastic force used for driving the diaphragm to move so that the valve rod can block the air leakage hole. In this way, rear-end equipment can be protected from being damaged by high-pressure gas, and therefore the safety performance of automobile parts and equipment is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gas decompression, and in particular to a pressure limiting valve, a seat adjustment system and a vehicle. Background Art

[0002] In the related art, the pressure limiting valve inputs high-pressure gas from the input end and outputs low-pressure gas from the output end, so as to keep the pressure at the rear end of the valve port relatively stable. However, for some reason, when the valve port cannot be closed or is not closed tightly, the gas pressure in the outlet channel will continue to rise, and the pressure at the rear end of the valve port will be higher than the design pressure. If the pressure at the rear end of the valve port exceeds the capacity of the rear-end equipment or device, it may cause irreversible damage to the rear-end equipment or device. Utility Model Content

[0003] An object of the present disclosure is to provide a pressure limiting valve, a seat adjustment system and a vehicle to at least partially solve the problems existing in the related art.

[0004] In order to achieve the above object, the present disclosure provides a pressure limiting valve, comprising:

[0005] A valve body having a pressure stabilizing chamber;

[0006] A diaphragm can be axially reciprocated in the valve body, the diaphragm and the valve body define a drainage cavity connected to the pressure-stabilizing cavity, and the diaphragm is formed with an air leakage hole for connecting to the drainage cavity;

[0007] A valve core, comprising a valve stem for opening or closing the air leakage hole, wherein the valve stem and the drainage cavity are both located on the same side of the diaphragm; and

[0008] A first elastic member, wherein a first end of the first elastic member abuts against a side of the diaphragm away from the drainage cavity, and the first elastic member provides an elastic force for driving the diaphragm to move so that the valve stem blocks the air leakage hole.

[0009] Optionally, the valve stem is arranged opposite to the air leakage hole, and the valve stem is configured to block the air leakage hole.

[0010] Optionally, the radial dimension of the head of the valve stem for sealing the air leakage hole is larger than the radial dimension of the air leakage hole, so that when the valve stem abuts against the diaphragm, the air leakage hole can be covered to cut off the air leakage hole.

[0011] Optionally, the end of the valve stem close to the diaphragm is configured as an upwardly convex arc surface, a groove matching the arc surface is formed on one side of the diaphragm close to the valve stem, and the air leakage hole is formed on the bottom wall of the groove.

[0012] Optionally, the diaphragm is made of rubber.

[0013] Optionally, an adjusting screw is threadedly connected to the top end of the valve body, and the end of the adjusting screw is used to press against the second end of the first elastic member.

[0014] Optionally, a washer is connected to the end of the adjusting screw, and two ends of the first elastic member abut against the washer and the diaphragm respectively.

[0015] Optionally, a reinforcing member is provided at a position of the diaphragm corresponding to the first elastic member.

[0016] Optionally, the valve body further comprises a high-pressure chamber, the connection between the high-pressure chamber and the pressure-stabilizing chamber forms a valve port, the valve core further comprises a valve core body for opening or closing the valve port, and the valve core body is arranged at one end of the valve stem away from the diaphragm,

[0017] The pressure-limiting valve further comprises a second elastic member, one end of which abuts against the end of the valve core body away from the valve port to provide an elastic force for driving the valve core body to move so that the valve core body closes the valve port.

[0018] Optionally, the valve core body comprises:

[0019] A main body having an end surface for the second elastic member to abut against, the main body radially protruding from the valve stem;

[0020] a stopper, disposed at an end of the main body close to the valve port; and

[0021] The limiting portion is axially protrudingly arranged at the end of the main body away from the valve port, and one end of the second elastic member is sleeved on the outer wall of the limiting portion to abut against the end surface of the main body.

[0022] Optionally, a sealing ring is installed at the valve port of the valve body, and the stopping portion is configured to abut against the sealing ring when the valve port is closed.

[0023] Optionally, the valve core body and the valve stem are integrally formed.

[0024] Optionally, the valve body includes an upper valve body and a lower valve body which are matched to each other, the diaphragm is arranged between the upper valve body and the lower valve body, the diaphragm and the lower valve body define a drainage chamber connected to the pressure-stabilizing chamber, the high-pressure chamber and the pressure-stabilizing chamber are formed at the lower valve body, the diaphragm and the upper valve body define an upper valve chamber connected to the air leakage hole, and the first elastic member is arranged in the upper valve chamber.

[0025] Optionally, a vent hole is formed on the side wall of the upper valve body to connect the upper valve cavity with the outside.

[0026] Optionally, an edge of the diaphragm is inserted between the upper valve body and the lower valve body.

[0027] According to a second aspect of the present disclosure, a seat adjustment system is also provided, comprising the above-mentioned pressure limiting valve.

[0028] According to a third aspect of the present disclosure, a vehicle is also provided, comprising the above-mentioned seat adjustment system.

[0029] Through the above technical scheme, under normal working conditions, due to the pressure of the first elastic member, the valve stem stops the air leakage hole of the diaphragm and the air leakage hole is closed; when the valve port cannot be closed or is not closed tightly, the air pressure in the pressure stabilizing chamber will continue to increase. When the air pressure at the rear end of the valve port exceeds the design value, part of the gas in the pressure stabilizing chamber enters the drainage chamber and overcomes the elastic force of the first elastic member, so that the diaphragm rises upward, the diaphragm is separated from the valve stem, the air leakage hole is connected, and the overpressure gas escapes from the air leakage hole, so that the pressure in the pressure stabilizing chamber is reduced to within the design pressure range, thereby protecting the rear-end equipment from being damaged by high-pressure gas and improving the safety performance of automobile components and equipment.

[0030] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0032] Figure 1 is an exploded view of a pressure limiting valve provided by an exemplary embodiment of the present disclosure;

[0033] Figure 2 is a cross-sectional view of a pressure-limiting valve provided by an exemplary embodiment of the present disclosure when the valve port is in a conducting state and the air leakage hole is in a closed state;

[0034] Figure 3 is a cross-sectional view of a pressure-limiting valve provided by an exemplary embodiment of the present disclosure when the valve port is in a cut-off state and the air leakage hole is in a cut-off state;

[0035] Figure 4 4 is a cross-sectional view of a pressure limiting valve provided by an exemplary embodiment of the present disclosure when the air leakage hole is in a conducting state.

[0036] Description of Reference Numerals

[0037] 10 Valve port 100 Valve body

[0038] 101 Upper valve body 102 Lower valve body

[0039] 110 High pressure chamber 111 Air inlet

[0040] 120 pressure stabilizing chamber 121 air outlet

[0041] 200 Upper valve chamber 300 Diaphragm

[0042] 310 vent hole 320 reinforcement

[0043] 400 drainage chamber 500 valve core

[0044] 510 valve core body 511 main body

[0045] 512 stopper 513 limiter

[0046] 520 valve stem 610 first elastic member

[0047] 620 second elastic member 700 sealing ring

[0048] 800 Adjustment screw 900 Cover

[0049] 1000 Washer 1100 Gasket DETAILED DESCRIPTION

[0050] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0051] In the present disclosure, unless otherwise stated, the directional terms "upper", "lower", "top", "bottom", "front", and "rear" used are defined based on the directions in which the relevant components are actually used. Figure 2 The direction indicated by the arrow in the figure is for the convenience of description in conjunction with the drawings, and does not actually limit the direction. "Inside" and "outside" refer to the outline of the corresponding parts. In addition, the terms "first" and "second" used in this disclosure are to distinguish one element from another, and do not have order and importance. In this disclosure, when the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0052] Reference Figures 1 to 4The present disclosure provides a pressure-limiting valve, which may include a valve body 100, a diaphragm 300, a valve core 500 and a first elastic member 610, wherein the valve body 100 has a pressure-stabilizing chamber 120; the diaphragm 300 may be axially reciprocatingly arranged in the valve body 100, the diaphragm 300 and the valve body 100 define a drainage chamber 400 connected to the pressure-stabilizing chamber 120, and an air leakage hole 310 for connecting the drainage chamber 400 is formed on the diaphragm 300; the valve core 500 includes a valve stem 520 for conducting or blocking the air leakage hole 310, and the valve stem 520 and the drainage chamber 400 are both located on the same side of the diaphragm 300; the first end of the first elastic member 610 abuts against a side of the diaphragm 300 away from the drainage chamber 400, and the first elastic member 610 provides an elastic force for driving the diaphragm 300 to move so that the valve stem 520 blocks the air leakage hole 310. In the embodiment of the present disclosure, the first elastic member 610 is a spring.

[0053] Through the above technical scheme, under normal working conditions, due to the pressure of the first elastic member, the valve stem stops the air leakage hole of the diaphragm and the air leakage hole is closed; when the valve port cannot be closed or is not closed tightly, the air pressure in the pressure stabilizing chamber will continue to increase. When the air pressure at the rear end of the valve port exceeds the design value, part of the gas in the pressure stabilizing chamber enters the drainage chamber and overcomes the elastic force of the first elastic member, so that the diaphragm rises upward, the diaphragm is separated from the valve stem, the air leakage hole is connected, and the overpressure gas escapes from the air leakage hole, so that the pressure in the pressure stabilizing chamber is reduced to within the design pressure range, thereby protecting the rear-end equipment from being damaged by high-pressure gas and improving the safety performance of automobile components and equipment.

[0054] In some embodiments, reference Figures 2 to 4 The valve stem 520 is arranged opposite to the air leakage hole 310, and the valve stem 520 is configured to block the air leakage hole 310. When the diaphragm 300 moves downward under the action of the first elastic member 610, the valve stem 520 can block the air leakage hole 310 on the diaphragm 300, so that the air leakage hole 310 is cut off.

[0055] Further, refer to Figure 4 The radial dimension of the head of the valve stem 520 for blocking the air leakage hole 310 is larger than the radial dimension of the air leakage hole 310, so that when the valve stem 520 is stopped on the diaphragm 300, the air leakage hole 310 can be covered and the air leakage hole 310 is cut off.

[0056] Further, refer to Figure 4, the end of the valve stem 520 close to the diaphragm 300 can be constructed as an arc surface convex upward, and a groove matching the arc surface can be formed on one side of the diaphragm 300 close to the valve stem 520, and the air leakage hole 310 is formed on the bottom wall of the groove. When the air leakage hole 310 is turned on, the arc surface of the diaphragm 300 and the groove of the valve stem 520 are separated to form a gap, and the overpressure gas can be discharged from the air leakage hole 310 through the gap; when the air leakage hole 310 is turned off, the arc surface of the valve stem 520 fits with the groove of the diaphragm 300 to close the air leakage hole 310. It should be noted that the matching structure of the valve stem 520 and the diaphragm 300 is not limited to the above situation, and it only needs to achieve mutual fit and sealing between the two to cut off the air leakage hole 310, which belongs to the protection scope of the present disclosure.

[0057] The material of the diaphragm 300 can be rubber, which is elastic and can make the valve stem 520 and the diaphragm 300 abut more tightly, thereby achieving a good sealing effect.

[0058] As an exemplary embodiment of the present disclosure, refer to Figure 2 The top of the valve body 100 may be threadedly connected with an adjusting screw 800, and the end of the adjusting screw 800 is used to press the second end of the first elastic member 610. The spring force of the first elastic member 610 can be adjusted by adjusting the stroke of the adjusting screw 800, and the spring force of the first elastic member 610 can be adjusted according to the actual pressure reduction requirement so that the diaphragm 300 reaches a balanced state.

[0059] According to some embodiments, reference Figure 2 The end of the adjusting screw 800 may be connected to a washer 1000, and the two ends of the first elastic member 610 respectively press against the washer 1000 and the diaphragm 300. The washer 1000 has sufficient strength to be pressed by the first elastic member 610 and can better withstand the elastic force of the first elastic member 610.

[0060] Further, refer to Figure 4 A reinforcing member 320 may be provided at a position of the diaphragm 300 corresponding to the first elastic member 610. The reinforcing member 320 can increase the strength of the diaphragm 300, and prevent the diaphragm 300 from being squeezed and deformed by the first elastic member 610 due to insufficient strength, thereby affecting product performance.

[0061] According to an exemplary embodiment of the present disclosure, the valve body 100 also has a high-pressure chamber 110 connected to the air inlet 111, and the pressure-stabilizing chamber 120 is connected to the air outlet 121. The connection between the high-pressure chamber 110 and the pressure-stabilizing chamber 120 forms a valve port 10. The valve core 500 may also include a valve core body 510 for conducting or shutting off the valve port 10. The valve core body 510 is arranged at an end of the valve stem 520 away from the diaphragm 300. The pressure-limiting valve also includes a second elastic member 620, and one end of the second elastic member 620 abuts against the end of the valve core body 510 away from the valve port 10 to provide an elastic force for driving the valve core body 510 to move, so that the valve core body 510 closes the valve port 10.

[0062] The working process of the pressure limiting valve is as follows: high-pressure gas enters the high-pressure chamber 110 from the air inlet 111, reaches the valve port 10, and then passes through the valve port 10 to the pressure-stabilizing chamber 120. When part of the gas enters the drainage chamber 400 from the pressure-stabilizing chamber 120, the air pressure of the drainage chamber 400 acts on the bottom of the diaphragm 300. When the air pressure is greater than the elastic force of the first elastic member 610, the diaphragm 300 moves upward. At this time, the valve core 500 also moves upward under the elastic force of the second elastic member 620, and the flow area of ​​the valve port 10 gradually decreases until it is closed. Figure 3 , the air pressure in the pressure stabilizing chamber 120 decreases, so that the diaphragm 300 reaches a balanced state; when the pressure in the pressure stabilizing chamber 120 continues to decrease, the air pressure in the drainage chamber 400 also decreases accordingly. When the elastic force of the first elastic member 610 is greater than the air pressure, the diaphragm 300 pushes the valve core 500 to move downward, and the valve port 10 is open. Figure 2 , the flow area increases, and the gas pressure in the pressure-stabilizing chamber 120 increases, so that the diaphragm 300 reaches a balanced state.

[0063] The valve core body 510 may include a main body 511, a stopper 512 and a limiting portion 513, wherein the main body 511 has an end face for the second elastic member 620 to stop, the main body 511 radially protrudes from the valve stem 520, and a gap is provided between the side wall of the main body 511 and the valve body 100. When the valve port 10 is connected, the overpressure gas can flow from the gap between the main body 511 and the valve body 100 to the gap between the stopper 512 and the valve port 10, and then be discharged from the air leakage hole 310; the stopper 512 is arranged at the end of the main body 511 close to the valve port 10, and the stopper 512 is used to stop the valve port 10; the limiting portion 513 is axially protruding and arranged at the end of the main body 511 away from the valve port 10, one end of the second elastic member 620 is sleeved on the outer wall of the limiting portion 513 to stop on the end face of the main body 511, and the limiting portion 513 can limit the radial displacement of the second elastic member 620. It should be noted that the present disclosure does not limit the structure of the valve core body 510 .

[0064] Specifically, refer to Figure 4A sealing ring 700 may be installed at the valve port 10 of the valve body 100, and the stopper 512 may be configured to abut the sealing ring 700 when the valve port 10 is closed. The valve stopper 512 may be made of rubber, and when the valve port 10 is closed, the sealing ring 700 may fit with the stopper 512 to seal the valve port 10, and the sealing effect is good.

[0065] In the embodiments of the present disclosure, reference Figure 2 The valve core body 510 and the valve stem 520 can be integrally formed. The valve core 500 is made into an integrally formed structure, which is convenient for production and assembly.

[0066] According to some embodiments, reference Figure 1 , Figure 2 The valve body 100 may include an upper valve body 101 and a lower valve body 102 that are matched with each other, the diaphragm 300 is arranged between the upper valve body 101 and the lower valve body 102, the diaphragm 300 and the lower valve body 102 define a drainage chamber 400 that is connected to the pressure-stabilizing chamber 120, the high-pressure chamber 110 and the pressure-stabilizing chamber 120 are formed at the lower valve body 102, the diaphragm 300 and the upper valve body 101 define an upper valve chamber 200 that is connected to the air leakage hole 310, and the first elastic member 610 is arranged in the upper valve chamber 200. Further, the pressure-limiting valve may also include a cover body 900 for accommodating the adjusting screw 800, the cover body 900 is detachably connected to the upper valve body 101, and the cover body 900 and the upper valve body 101 are matched with each other in the moving direction of the valve core 500.

[0067] A vent hole for connecting the upper valve cavity 200 with the outside world may be formed on the side wall of the upper valve body 101, so that the overpressure gas is discharged from the vent hole 310 into the upper valve cavity 200 and then discharged to the outside world through the vent hole.

[0068] In some embodiments, reference Figure 2 , the edge of the diaphragm 300 can be inserted between the upper valve body 101 and the lower valve body 102. There is a gap between the upper valve body 101 and the lower valve body 102 for the edge of the diaphragm 300 to move up and down.

[0069] Further, refer to Figure 2 A gasket 1100 may be provided between the diaphragm 300 and the upper valve body 101. The gasket 1100 is an elastic structure, and the diaphragm 300 abuts against the gasket 1100 when moving, which can protect the diaphragm 300.

[0070] According to a second aspect of the present disclosure, a seat adjustment system is also provided, which may include the above-mentioned pressure limiting valve. The seat adjustment system has all the beneficial effects of the above-mentioned pressure limiting valve, which will not be described in detail here.

[0071] According to a third aspect of the present disclosure, a vehicle is also provided, the vehicle comprising the above-mentioned seat adjustment system. The vehicle has all the beneficial effects of the above-mentioned seat adjustment system, which will not be described in detail here.

[0072] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0074] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A pressure limiting valve, characterized in that: include: A valve body having a pressure stabilizing chamber; A diaphragm can be axially reciprocated in the valve body, the diaphragm and the valve body define a drainage cavity connected to the pressure-stabilizing cavity, and the diaphragm is formed with an air leakage hole for connecting to the drainage cavity; A valve core, comprising a valve stem for opening or closing the air leakage hole, wherein the valve stem and the drainage cavity are both located on the same side of the diaphragm; as well as A first elastic member, wherein a first end of the first elastic member abuts against a side of the diaphragm away from the drainage cavity, and the first elastic member provides an elastic force for driving the diaphragm to move so that the valve stem blocks the air leakage hole.

2. The pressure limiting valve according to claim 1, characterized in that: The valve stem is arranged opposite to the air leakage hole, and the valve stem is configured to block the air leakage hole.

3. The pressure limiting valve according to claim 2, characterized in that: The radial dimension of the head of the valve stem for blocking the air leakage hole is larger than the radial dimension of the air leakage hole, so that when the valve stem abuts against the diaphragm, the air leakage hole can be covered to block the air leakage hole.

4. The pressure limiting valve according to claim 3, characterized in that: The end of the valve stem close to the diaphragm is configured as an upwardly convex arc surface, a groove matching the arc surface is formed on one side of the diaphragm close to the valve stem, and the air leakage hole is formed on the bottom wall of the groove.

5. The pressure limiting valve according to claim 1, characterized in that: The material of the diaphragm is rubber.

6. The pressure limiting valve according to claim 1, characterized in that: The top end of the valve body is threadedly connected with an adjusting screw, and the end of the adjusting screw is used to press the second end of the first elastic member.

7. The pressure limiting valve according to claim 6, characterized in that: A washer is connected to the end of the adjusting screw, and two ends of the first elastic member abut against the washer and the diaphragm respectively.

8. The pressure limiting valve according to claim 1, characterized in that: A reinforcing member is provided at a position of the diaphragm corresponding to the first elastic member.

9. The pressure limiting valve according to any one of claims 1 to 8, characterized in that: The valve body also has a high-pressure chamber, and the connection between the high-pressure chamber and the pressure-stabilizing chamber forms a valve port. The valve core also includes a valve core body for opening or closing the valve port, and the valve core body is arranged at one end of the valve stem away from the diaphragm. The pressure-limiting valve further comprises a second elastic member, one end of which abuts against the end of the valve core body away from the valve port to provide an elastic force for driving the valve core body to move so that the valve core body closes the valve port.

10. The pressure limiting valve according to claim 9, characterized in that: The valve core body comprises: A main body having an end surface for the second elastic member to abut against, the main body radially protruding from the valve stem; a stopper, disposed at an end of the main body close to the valve port; and The limiting portion is axially protrudingly arranged at the end of the main body away from the valve port, and one end of the second elastic member is sleeved on the outer wall of the limiting portion to abut against the end surface of the main body.

11. The pressure limiting valve according to claim 10, characterized in that: A sealing ring is installed at the valve port of the valve body, and the stop portion is configured to abut against the sealing ring when the valve port is closed.

12. The pressure limiting valve according to claim 9, characterized in that: The valve core body and the valve stem are integrally formed.

13. The pressure limiting valve according to claim 9, characterized in that: The valve body includes an upper valve body and a lower valve body which are matched with each other, the diaphragm is arranged between the upper valve body and the lower valve body, the diaphragm and the lower valve body define a drainage chamber connected with the pressure-stabilizing chamber, the high-pressure chamber and the pressure-stabilizing chamber are formed at the lower valve body, the diaphragm and the upper valve body define an upper valve chamber connected with the air leakage hole, and the first elastic member is arranged in the upper valve chamber.

14. The pressure limiting valve according to claim 13, characterized in that: An air leakage port for connecting the upper valve cavity with the outside is formed on the side wall of the upper valve body.

15. The pressure limiting valve according to claim 13, characterized in that: The edge of the diaphragm is inserted between the upper valve body and the lower valve body.

16. The pressure limiting valve according to claim 15, characterized in that: A gasket is arranged between the diaphragm and the upper valve body.

17. A seat adjustment system, characterized in that: The invention comprises the pressure limiting valve according to any one of claims 1 to 16.

18. A vehicle, characterized in that: Includes the seat adjustment system of claim 17.

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