CN221348043U - Pressure release valve, air suspension and vehicle - Google Patents

Abstract

The embodiment of the application provides a pressure release valve, an air suspension and a vehicle, wherein the pressure release valve comprises a valve seat, a valve body and a diaphragm, wherein the valve seat and the valve body are arranged along a first direction; the valve seat is provided with a medium channel, a pressure relief channel and a bulge part positioned between the medium channel and the pressure relief channel, and the bulge part is arranged around the pressure relief channel; the valve body comprises a shell and a valve core assembly, the valve core assembly is movably connected in the shell along a first direction, and the diaphragm is arranged between the valve core assembly and the protruding portion. Therefore, when the pressure of the medium in the medium channel is higher, namely the pressure acted by the valve core assembly on the diaphragm is smaller than the pressure of the medium in the medium channel, the diaphragm is released from abutting with the bulge, so that the medium channel is communicated with the pressure release channel to discharge part of the medium, and overload of the pressure of the medium can be effectively avoided; in addition, because the medium only flows in the valve seat, the structure of the pressure relief valve can be further simplified, the assembly precision of the pressure relief valve can be conveniently controlled, the air tightness of the pressure relief valve can be improved, and the risk of medium leakage can be reduced.

Description

Pressure release valve, air suspension and vehicle

Technical Field

The application belongs to the technical field of vehicles, and particularly relates to a pressure release valve, an air suspension and a vehicle.

Background

With the improvement of living standard, the requirements of people on the travelling comfort of vehicles are higher and higher, so that the air suspension with better damping effect is widely applied to the vehicles. The key component of the air suspension is an air compressor, and in order to avoid air pressure overload, a pressure relief valve is usually arranged in the air path of the air compressor.

In the prior art, a pressure relief valve generally comprises a valve body and a valve seat, wherein the valve body and the valve seat are mutually communicated, and a medium flows in the valve body and the valve seat according to a preset path so as to realize the opening or closing of the pressure relief valve. However, due to the complex structure of the valve body and the valve seat, the assembly accuracy is difficult to control, and the problem that the air tightness of the pressure release valve does not reach the standard easily occurs, so that the risk of medium leakage is increased.

Disclosure of utility model

The application aims to provide a pressure release valve, an air suspension and a vehicle, and aims to solve the problems that the existing pressure release valve is complex in structure, difficult to control in assembly precision, poor in air tightness and high in risk of gas leakage.

In order to solve the technical problems, the application is realized as follows:

In a first aspect, the present disclosure is directed to a pressure relief valve comprising a valve seat and a valve body disposed along a first direction, and a diaphragm;

The valve seat is provided with a medium channel, a pressure relief channel and a protruding part positioned between the medium channel and the pressure relief channel, and the protruding part is arranged around the pressure relief channel;

The valve body comprises a shell and a valve core assembly, the valve core assembly is movably connected in the shell along the first direction, and the diaphragm is arranged between the valve core assembly and the protruding part;

when the pressure of the valve core assembly acting on the diaphragm is greater than or equal to the medium pressure in the medium channel, the diaphragm is abutted with the bulge so as to separate the medium channel from the pressure relief channel; and under the condition that the pressure of the valve core assembly acting on the diaphragm is smaller than the medium pressure in the medium channel, the diaphragm is out of abutting contact with the bulge part, so that the medium channel is communicated with the pressure relief channel to discharge part of the medium.

Optionally, the valve seat further comprises a communication port, the communication port is arranged at one end of the valve seat, which is close to the diaphragm, and is positioned between the medium channel and the pressure release channel, and the communication port is respectively communicated with the medium channel and the pressure release channel;

At least part of the protruding part extends into the communication port and protrudes towards the direction of the diaphragm, and at least part of the diaphragm extends into the communication port and abuts against the protruding part under the condition that the pressure of the valve core assembly acting on the diaphragm is larger than or equal to the medium pressure in the medium channel.

Optionally, the pressure release channel has a first axis, the boss has a second axis, and the communication port has a third axis;

The first axis, the second axis and the third axis are coincident and parallel to the first direction.

Optionally, the valve body further comprises a cover, the cover is arranged at one end of the shell, which is away from the membrane, and the cover is provided with a guide groove extending along a first direction;

A first bottom wall is arranged at one end of the shell, which is close to the diaphragm, and is provided with a first through hole which is coaxially arranged with the guide groove;

At least part of the valve core component, which is close to one end of the sealing cover, is in sliding connection with the guide groove, and at least part of the valve core component, which is close to one end of the first bottom wall, is in sliding connection with the first through hole, so that the valve core component moves along the first direction.

Optionally, the valve core assembly includes a valve core body, and along the first direction, the valve core body has a first end and a second end that are disposed away from each other, and the second end is disposed away from the cover;

The first end is provided with a first guide part which is connected with the guide groove in a sliding way along the first direction; the second end is provided with a second guide part which is connected with the first through hole in a sliding way along the first direction so as to enable the valve core body to move along the first direction.

Optionally, the valve core assembly comprises a valve core body and a spring;

One end of the valve core body, which is close to the valve seat, is provided with a limiting protrusion along the circumferential direction, and the limiting protrusion is connected with the shell in a sliding manner; the limiting protrusion is provided with a first abutting surface and a second abutting surface which are arranged in a mutually deviating manner along the first direction, and the second abutting surface is abutted with at least part of the first bottom wall so as to limit the movement of the valve core body;

The spring is sleeved on the valve core body, the spring is provided with a third end and a fourth end which are arranged in a mutually deviating mode along the first direction, the third end is abutted to at least part of the sealing cover, the fourth end is abutted to the first abutting surface so as to limit the spring, and the movement of the valve core body is limited through the elastic action of the spring.

Optionally, a first protrusion structure is disposed on a side of the first bottom wall, which is close to the valve seat, and the first protrusion structure abuts against the diaphragm, so as to limit the medium from flowing into the valve body.

Optionally, the first protruding structure includes at least two annular protruding portions, and at least two annular protruding portions are disposed at intervals in sequence along a radial direction of the first bottom wall.

Optionally, the cover is screwed with the housing.

Optionally, in the first direction, the cover has a fifth end and a sixth end disposed away from each other, the sixth end being adjacent to the valve element assembly;

The fifth end is provided with a driving groove which is used for being matched with an external driving tool to drive the sealing cover to rotate to a preset position of the shell;

The guide groove is arranged at the sixth end and is communicated with the driving groove.

In a second aspect, the application also discloses an air suspension applied to a vehicle, the air suspension comprises an air compressor, and a pressure relief valve of any one of the above is arranged in a gas path of the air compressor.

In a third aspect, the application also discloses a vehicle, which comprises the air suspension.

In the embodiment of the application, the pressure relief valve comprises a valve seat and a valve body which are arranged along the first direction, and a diaphragm; the valve seat is provided with a medium channel, a pressure relief channel and a protruding part positioned between the medium channel and the pressure relief channel, and the protruding part is arranged around the pressure relief channel; the valve body comprises a shell and a valve core assembly, the valve core assembly is movably connected in the shell along the first direction, and the diaphragm is arranged between the valve core assembly and the protruding part; when the pressure of the valve core assembly acting on the diaphragm is greater than or equal to the medium pressure in the medium channel, the diaphragm is abutted with the bulge so as to separate the medium channel from the pressure relief channel; and under the condition that the pressure of the valve core assembly acting on the diaphragm is smaller than the medium pressure in the medium channel, the diaphragm is out of abutting contact with the bulge part, so that the medium channel is communicated with the pressure relief channel to discharge part of the medium. Thus, when the pressure of the medium in the medium channel is smaller, namely the pressure acted by the valve core assembly on the diaphragm is larger than or equal to the pressure of the medium in the medium channel, the diaphragm is abutted with the bulge, so that the medium channel and the pressure relief channel are blocked; when the medium pressure in the medium channel is higher, namely the pressure acted on the diaphragm by the valve core assembly is smaller than the medium pressure in the medium channel, the diaphragm is in release contact with the protruding part, so that the medium channel is communicated with the pressure release channel to discharge part of medium, and overload of the medium pressure can be effectively avoided. In addition, because medium passageway and pressure release passageway all set up in the disk seat, the medium only flows in the disk seat inside promptly, can further simplify the structure of relief valve, the assembly precision of the control relief valve of being convenient for is favorable to improving the gas tightness of relief valve, reduces the risk that the medium revealed.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic diagram of a relief valve according to an embodiment of the present application;

FIG. 2 is a second schematic diagram of a pressure relief valve according to an embodiment of the present application;

FIG. 3 is a schematic view of a valve seat according to an embodiment of the present application;

FIG. 4 is a schematic view of the structure of a housing in a valve body according to an embodiment of the present application;

FIG. 5 is a schematic structural view of a valve core body in a valve body according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a cover in a valve body according to an embodiment of the present application.

Reference numerals: 1. valve body, 11, housing, 111, first bottom wall, 1111, first boss configuration, 1112, second boss configuration, 112, first through hole, 12, spool body, 121, stop boss, 122, first guide portion, 123, second guide portion, 13, spring, 14, cover, 141, drive slot, 142, guide slot, 143, stop slot, 2, valve seat, 21, media passage, 22, relief passage, 23, communication port, 24, boss, 25, mounting slot, 251, annular groove, 3, diaphragm, X.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The embodiment of the application provides a relief valve, and the relief valve is described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to fig. 2, a schematic structural diagram of a relief valve provided by an embodiment of the present application is shown, referring to fig. 3, a schematic structural diagram of a valve seat provided by an embodiment of the present application is shown, and referring to fig. 4 to fig. 6, schematic structural diagrams of a housing, a valve core body and a cover in a valve body provided by an embodiment of the present application are shown respectively.

As shown in fig. 1 to 2, the present application provides a relief valve comprising a valve seat 2 and a valve body 1 arranged in a first direction X, and a diaphragm 3; the valve seat 2 is provided with a medium channel 21, a pressure relief channel 22 and a bulge 24 positioned between the medium channel 21 and the pressure relief channel 22, and the bulge 24 is arranged around the pressure relief channel 22; the valve body 1 comprises a shell 11 and a valve core assembly, the valve core assembly is movably connected in the shell 11 along a first direction X, and the diaphragm 3 is arranged between the valve core assembly and the boss 24; when the pressure of the valve core assembly acting on the diaphragm 3 is greater than or equal to the medium pressure in the medium channel 21, the diaphragm 3 is abutted against the boss 24 to isolate the medium channel 21 from the pressure release channel 22; when the pressure of the valve element assembly acting on the diaphragm 3 is smaller than the pressure of the medium in the medium passage 21, the diaphragm 3 is released from abutment with the boss 24, so that the medium passage 21 communicates with the pressure release passage 22 to discharge a part of the medium.

In the embodiment of the application, since the valve seat 2 is provided with the medium channel 21, the pressure relief channel 22 and the bulge 24 positioned between the medium channel 21 and the pressure relief channel 22, the bulge 24 is arranged around the pressure relief channel 22; the valve body 1 comprises a valve element assembly movable in a first direction X, between which a diaphragm 3 is arranged and a boss 24. Thus, when the pressure of the medium in the medium channel 21 is smaller, that is, the pressure of the valve core assembly acting on the diaphragm 3 is greater than or equal to the pressure of the medium in the medium channel 21, the diaphragm 3 is abutted with the boss 24, so that the medium channel 21 and the pressure release channel 22 are blocked; when the medium pressure in the medium channel 21 is higher, that is, the pressure of the valve core assembly acting on the diaphragm 3 is smaller than the medium pressure in the medium channel 21, the diaphragm 3 is released from abutting with the boss 24, so that the medium channel 21 is communicated with the pressure release channel 22 to discharge part of the medium, and overload of the medium pressure can be effectively avoided. In addition, because medium passageway 21 and pressure release passageway 22 all set up in disk seat 2, the medium only flows in disk seat 2 inside promptly, can further simplify the structure of relief valve, the assembly precision of the control relief valve of being convenient for is favorable to improving the gas tightness of relief valve, reduces the risk that the medium revealed.

It should be noted that, in the embodiment of the present application, the diaphragm 3 is a sheet structure with elastic deformation capability, and compared with the sealing ring, the diaphragm 3 has a larger stress surface, so that the medium can be better blocked in the gas path of the valve seat 2, which is beneficial to improving the air tightness of the pressure release valve and reducing the risk of medium leakage. The diaphragm 3 of the embodiment of the application is preferably made of a composite material reinforced by flexible rubber and nylon wires, has larger flexibility and higher mechanical strength, meets the air tightness requirement, has higher compressive strength, is beneficial to prolonging the service life of the diaphragm 3 and reduces the maintenance cost of the pressure relief valve.

The pressure of the valve core assembly acting on the diaphragm 3 is the valve opening pressure of the relief valve. The specific working process of the pressure release valve is as follows: when the medium pressure of the medium channel 21 is smaller than or equal to the valve opening pressure of the relief valve, the diaphragm 3 is abutted against the boss 24 under the action of the valve core assembly, and the relief valve is in a closed state, and at this time, the medium only flows in the medium channel 21 and the channel formed by the communication port 23 and the diaphragm 3. When the medium pressure of the medium channel 21 is increased to be greater than the valve opening pressure of the pressure relief valve, the medium acts on the diaphragm 3, so that the diaphragm 3 is in contact with the boss 24, the pressure relief valve is in an open state, and part of the medium is rapidly discharged from a gap formed between the diaphragm 3 and the boss 24 to realize pressure relief. As part of the medium is discharged, the medium pressure of the medium channel 21 gradually decreases, and when the medium pressure of the medium channel 21 is smaller than or equal to the valve opening pressure, the diaphragm 3 abuts against the boss 24 under the action of the valve core assembly, so that the pressure release valve is in a closed state, and the medium only flows in the medium channel 21 and the channel formed by the communication port 23 and the diaphragm 3. In practical application, the pressure release valve of the embodiment of the application can be applied to pressure release of a gas medium and pressure release of a liquid medium, and a person skilled in the art can select an application scene of the pressure release valve according to needs, and the following is a detailed description based on the pressure release scene of the gas medium.

As shown in fig. 3, the valve seat 2 further includes a communication port 23, the communication port 23 is disposed at one end of the valve seat 2 near the diaphragm 3 and between the medium channel 21 and the pressure release channel 22, and the communication port 23 is respectively communicated with the medium channel 21 and the pressure release channel 22; at least part of the protruding portion 24 extends into the communication port 23 and protrudes toward the diaphragm 3, and when the pressure of the valve element assembly acting on the diaphragm 3 is greater than or equal to the pressure of the medium in the medium passage 21, at least part of the diaphragm 3 extends into the communication port 23 and abuts against the protruding portion 24.

In the embodiment of the application, the communication port 23 is arranged, and the communication port 23 is respectively communicated with the medium channel 21 and the pressure relief channel 22, so that when the pressure relief valve is opened, the medium can sequentially flow through the medium channel 21 and the communication port 23 and be discharged from the pressure relief channel 22, thereby avoiding air pressure overload. Since at least part of the protruding portion 24 extends into the communication port 23 and protrudes toward the direction of the diaphragm 3, in this way, when the pressure of the valve core assembly acting on the diaphragm 3 is greater than or equal to the pressure of the medium in the medium channel 21, at least part of the diaphragm 3 extends into the communication port 23 and abuts against the protruding portion 24, so that the medium channel 21 is blocked from the pressure release channel 22, and medium leakage is avoided. In summary, the medium channel 21 and the pressure release channel 22 of the pressure release valve in the embodiment of the application are both arranged on the valve seat 2, and the blocking or circulation of air flow can be realized by abutting or releasing the bulge part 24 positioned on the communication port 23 and the diaphragm 3, so that the air path structure of the valve seat 2 is simple, the processing is convenient, and the production cost of the pressure release valve is reduced.

In some alternative embodiments of the present application, the pressure relief passage 22 has a first axis, the boss 24 has a second axis, and the communication port 23 has a third axis; the first axis, the second axis and the third axis are coincident and parallel to the first direction X.

In the embodiment of the present application, since the axes of the pressure release channel 22, the boss 24 and the communication port 23 are coincident and parallel to the first direction X, that is, the three are coaxially disposed. On the one hand, the positioning processing of the pressure relief channel 22, the bulge 24 and the communication port 23 is facilitated, and the processing efficiency of the pressure relief valve is improved; on the other hand, when the pressure of the medium in the medium channel 21 is greater than the pressure of the valve core assembly acting on the diaphragm 3, the medium in the communication port 23 can uniformly act on the diaphragm 3, so that the pressure unevenness can be avoided to cause the partial diaphragm 3 to release the contact with the boss 24 first, and the opening precision of the pressure release valve can be reduced.

It should be noted that, the medium channel 21 is used to connect with an external air channel, and those skilled in the art may set the medium channel according to actual needs. In one embodiment, the medium channel 21 is provided through the valve seat 2, and the axis of the medium channel 21 is perpendicular to the first direction X; along the extending direction of the medium channel 21, the medium channel 21 comprises a medium inlet and a medium outlet which are arranged in a mutually deviating way, and the pressure relief valve can be installed in the air path of the air compressor through the connection of the medium inlet and the medium outlet and the pipeline, so that the damage of other valves and even the air compressor caused by the continuous rising of the air pressure in the air path is effectively avoided. Further, the communication port 23 has a bottom wall, a peripheral wall extending in the direction of the diaphragm 3 along the periphery of the bottom wall, and the side wall of the medium passage 21 communicates with the bottom wall of the communication port 23, and/or the peripheral wall of the communication port 23. The drawings of the present application only show the case where the medium passage 21 communicates with the bottom wall and the peripheral wall of the communication port 23 at the same time; in practical applications, the medium passage 21 may be in communication with only the bottom wall of the communication port 23, or may be in communication with only the peripheral wall of the communication port 23, and is not limited thereto, and may be adjusted as required by those skilled in the art.

As shown in fig. 3 to 4, an installation groove 25 is further formed at one end of the valve seat 2, which is close to the valve body 1, at least part of the groove wall of the installation groove 25 is recessed towards the direction away from the center of the installation groove 25 to form an annular groove 251, a second annular protruding structure is arranged at a corresponding position on the outer side wall of the housing 11, and reliable connection between the valve body 1 and the valve seat 2 can be realized through interference fit between the second annular protruding structure and the annular groove 251.

Specifically, the second annular protruding structure includes a first annular boss and a second annular boss that are sequentially disposed along the first direction X, the second annular boss being close to the valve seat 2; the radial dimension of the first annular boss is smaller than that of the second annular boss, and the second annular boss is in interference fit with the annular groove 251. In this way, an assembling gap can be formed between the first annular boss and the annular groove 251, in the process of press-fitting the valve body 1 to the valve seat 2, glue or scrap iron or the like can be filled in the assembling gap to permeate into the mounting gap between the valve body 1 and the valve seat 2, so that leakage of a gas medium from the mounting gap can be avoided, and the whole mechanical strength and the air tightness of the pressure relief valve can be further improved.

In some alternative embodiments of the application, the valve body 1 further comprises a cover 14, the cover 14 being arranged at the end of the housing 11 facing away from the membrane 3, the cover 14 being provided with a guide groove 142 extending in the first direction X; the shell 11 is provided with a first bottom wall 111 at one end close to the membrane 3, the first bottom wall 111 is provided with a first through hole 112, and the first through hole 112 and the guide groove 142 are coaxially arranged; at least a portion of the end of the valve core assembly adjacent to the cover 14 is slidably coupled to the guide groove 142, and at least a portion of the end of the valve core assembly adjacent to the first bottom wall 111 is slidably coupled to the first through hole 112 such that the valve core assembly moves in the first direction X.

In the embodiment of the application, since the cover 14 is disposed at one end of the housing 11, the guide groove 142 is disposed on the cover 14, the first bottom wall 111 is disposed at the other end of the housing 11, the first through hole 112 is disposed on the first bottom wall 111, and the first through hole 112 and the guide groove 142 are coaxially disposed, so that when at least part of two ends of the valve core assembly is slidably connected with the guide groove 142 and the first through hole 112, the valve core assembly can move along the first direction X, thereby realizing the switching between the abutting and the releasing states of the diaphragm 3 and the protruding portion 24, and realizing the opening and closing of the pressure release valve.

As shown in fig. 5, the valve cartridge assembly includes a valve cartridge body 12, the valve cartridge body 12 having a first end and a second end disposed away from each other, the second end disposed away from the cover 14, along a first direction X; the first end is provided with a first guide part 122, and the first guide part 122 is connected to the guide groove 142 in a sliding manner along a first direction X; the second end is provided with a second guiding portion 123, and the second guiding portion 123 is slidably connected to the first through hole 112 along the first direction X, so that the valve core body 12 moves along the first direction X.

In the embodiment of the present application, since the first guide portion 122 and the second guide portion 123 are respectively disposed at two ends of the valve core body 12, the valve core body 12 can move along the first direction X through the sliding connection between the first guide portion 122 and the guide groove 142 and the sliding connection between the second guide portion 123 and the first through hole 112, so that the diaphragm 3 and the boss 24 can be switched between the abutting and the releasing states. Specifically, during the opening of the relief valve, the high-pressure medium acts on the diaphragm 3 and pushes the valve body 12 to move in a direction away from the valve seat 2, so that the diaphragm 3 is disengaged from the boss 24; during the closing of the relief valve, the valve body 12 moves in a direction approaching the valve seat 2, thereby pushing the diaphragm 3 in contact with the end surface of the second guide 123 against the boss 24. It should be noted that, during the processing of the valve core body 12, a groove may be formed in the valve core body, so that materials may be saved during mass production, which is beneficial to reducing the production cost of the relief valve.

In some alternative embodiments of the present application, the valve cartridge assembly includes a cartridge body 12 and a spring 13; a limiting protrusion 121 is arranged at one end of the valve core body 12, which is close to the valve seat 2, along the circumferential direction, and the limiting protrusion 121 is connected with the shell 11 in a sliding manner; the limiting protrusion 121 has a first abutting surface and a second abutting surface which are arranged away from each other along the first direction X, and the second abutting surface abuts against at least part of the first bottom wall 111 to limit the movement of the valve core body 12; the spring 13 is sleeved on the valve core body 12, and along the first direction X, the spring 13 is provided with a third end and a fourth end which are mutually deviated from each other, the third end is abutted against at least part of the sealing cover 14, and the fourth end is abutted against the first abutting surface so as to limit the spring 13 and limit the movement of the valve core body 12 through the elastic action of the spring 13.

In the embodiment of the application, the spring 13 is arranged, the spring 13 is sleeved on the valve core body 12, and the valve core body 12 can move along the first direction X through the expansion and the contraction of the spring 13. Due to the fact that the limiting protrusion 121 is arranged, the first abutting surface of the limiting protrusion 121 abuts against the spring 13, so that the spring 13 can be limited, the second abutting surface of the limiting protrusion 121 abuts against the first bottom wall 111, and the valve core body 12 can be limited. In addition, because the limiting protrusion 121 is slidably connected to the housing 11, the guiding effect can be achieved in the expansion and contraction process of the spring 13, and the swing of the spring 13 is avoided, so that the valve opening precision of the pressure relief valve is prevented from being affected.

The valve opening pressure of the relief valve depends on the elastic force value of the spring 13, and in the long-term use process, the spring 13 is easy to lose the elastic force value, so that the valve opening precision of the relief valve is reduced. At this time, the normal operation of the pressure relief valve can be ensured by replacing the spring 13, which is beneficial to reducing the maintenance cost of the pressure relief valve.

In some alternative embodiments of the present application, the side of the first bottom wall 111 near the valve seat 2 is provided with a first protrusion 1111, and the first protrusion 1111 abuts against the diaphragm 3 to limit the medium flowing into the valve body 1.

Specifically, the first protruding structure 1111 includes at least two annular protruding portions, which are sequentially spaced apart in the radial direction of the first bottom wall 111.

In the embodiment of the application, as the first protruding structure 1111 is arranged on the side of the first bottom wall 111, which is close to the valve seat 2, and the first protruding structure 1111 comprises at least two annular protruding parts which are sequentially arranged at intervals along the radial direction of the first bottom wall 111, in the press fitting process of the valve body 1 and the valve seat 2, on one hand, the acting area of the shell 11 is reduced due to the annular protruding parts, so that the press fitting acting force is more concentrated, the press fitting of the valve body 1 and the valve seat 2 is more compact, and the improvement of the air tightness of the pressure relief valve is facilitated; on the other hand, due to the arrangement of the at least two annular protruding parts, the diaphragm 3 can be extruded between the concave parts formed by the two adjacent annular protruding parts in the press fitting process, and the extruded diaphragm 3 is rugged, so that the shell 11 and the diaphragm 3 have larger friction force, the diaphragm 3 can be prevented from sliding relative to the shell 11, and the air tightness of the pressure relief valve can be further improved.

The number of the annular protrusions may be adjusted according to actual needs by those skilled in the art, and is not limited herein. It will be appreciated that the greater the number of annular projections, the better the tightness of the relief valve after assembly of the valve body 1, the diaphragm 3 and the valve seat 2, but at the same time the processing costs of the relief valve are increased.

In some alternative embodiments of the present application, the cover 14 is threadably coupled to the housing 11.

Specifically, the cover 14 is provided with external threads along the circumferential direction, the inner side wall of the housing 11 is provided with internal threads along the circumferential direction, and reliable connection between the cover 14 and the housing 11 can be realized through cooperation of the external threads and the internal threads.

In the embodiment of the application, since the sealing cover 14 is in threaded connection with the housing 11, on one hand, in the process of assembling the valve body 1, firstly, the valve core assembly is installed into the housing 11, and then, the sealing cover 14 is installed on the housing 11, so that the assembly of the valve body 1 can be completed, and the assembly efficiency is convenient to improve. On the other hand, the compression height of the spring 13 can be changed by rotating the cover 14 to different positions of the housing 11 through the screwing depth of the cover 14, so that the valve opening pressure of the pressure relief valve is adjusted, and the application flexibility of the pressure relief valve is improved. It will be appreciated that the greater the opening pressure of the relief valve, the greater the depth of threading within the adjustable range.

As shown in fig. 6, in the first direction X, the cover 14 has a fifth end and a sixth end disposed away from each other, the sixth end being adjacent the valve core assembly; the fifth end is provided with a driving groove 141, and the driving groove 141 is used for being matched with an external driving tool to drive the sealing cover 14 to rotate to a preset position of the shell 11; the guide groove 142 is provided at the sixth end, and the guide groove 142 communicates with the driving groove 141.

In the embodiment of the application, the driving groove 141 is arranged, so that the cover 14 can be conveniently assembled and disassembled through the cooperation of the driving groove 141 and an external driving tool, and the driving groove 141 is communicated with the guide groove 142, so that the interior of the valve body 1 is always communicated with the outside atmosphere, and the negative pressure formed in the valve body 1 can be avoided, and the opening of the pressure relief valve is prevented from being influenced.

It should be noted that the preset position refers to a position of the cover 14 in the housing 11 corresponding to a valve opening pressure required by the pressure release valve, and a person skilled in the art can adjust the preset position of the cover 14 according to the valve opening pressure actually required. In addition, the cross section of the driving groove 141 along the direction perpendicular to the first direction X may be triangular, rectangular, hexagonal or other shapes, and by placing the driving tool with the shape adapted into the driving groove 141, the cover 14 can be rotated to the preset position of the housing 11 by rotating the driving tool, so as to adjust the valve opening pressure of the relief valve, thereby being beneficial to improving the application flexibility of the relief valve and expanding the application range of the relief valve.

In some alternative embodiments of the present application, a limiting groove 143 is further disposed at an end of the cover 14 near the valve core assembly, the limiting groove 143 is disposed coaxially with the guiding groove 142, and the limiting groove 143 is used for limiting the spring 13.

In the embodiment of the application, the limiting groove 143 is arranged, so that the spring 13 can be well limited and guided under the combined action of the limiting groove 143 and the limiting protrusion 121, the stability of the spring 13 can be improved, and the spring force value of the spring 13 is prevented from being changed due to swinging in the expansion process of the spring 13, so that the valve opening precision of the pressure relief valve is prevented from being influenced.

In summary, the pressure release valve provided by the embodiment of the application at least comprises the following advantages:

In the embodiment of the application, the pressure relief valve comprises a valve seat and a valve body which are arranged along the first direction, and a diaphragm; the valve seat is provided with a medium channel, a pressure relief channel and a protruding part positioned between the medium channel and the pressure relief channel, and the protruding part is arranged around the pressure relief channel; the valve body comprises a shell and a valve core assembly, the valve core assembly is movably connected in the shell along the first direction, and the diaphragm is arranged between the valve core assembly and the protruding part; when the pressure of the valve core assembly acting on the diaphragm is greater than or equal to the medium pressure in the medium channel, the diaphragm is abutted with the bulge so as to separate the medium channel from the pressure relief channel; and under the condition that the pressure of the valve core assembly acting on the diaphragm is smaller than the medium pressure in the medium channel, the diaphragm is out of abutting contact with the bulge part, so that the medium channel is communicated with the pressure relief channel to discharge part of the medium. Thus, when the pressure of the medium in the medium channel is smaller, namely the pressure acted by the valve core assembly on the diaphragm is larger than or equal to the pressure of the medium in the medium channel, the diaphragm is abutted with the bulge, so that the medium channel and the pressure relief channel are blocked; when the medium pressure in the medium channel is higher, namely the pressure acted on the diaphragm by the valve core assembly is smaller than the medium pressure in the medium channel, the diaphragm is in release contact with the protruding part, so that the medium channel is communicated with the pressure release channel to discharge part of medium, and overload of the medium pressure can be effectively avoided. In addition, because medium passageway and pressure release passageway all set up in the disk seat, the medium only flows in the disk seat inside promptly, can further simplify the structure of relief valve, the assembly precision of the control relief valve of being convenient for is favorable to improving the gas tightness of relief valve, reduces the risk that the medium revealed.

The embodiment of the application also provides an air suspension applied to a vehicle, which comprises an air compressor, wherein the pressure release valve of any one of the embodiments is arranged in the air path of the air compressor.

It should be noted that in the embodiment of the present application, the structure of the pressure release valve is the same as that of the pressure release valve described in any of the above embodiments, and the beneficial effects thereof are also similar, and are not described herein.

The embodiment of the application also provides a vehicle, which comprises the air suspension according to the embodiment.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A pressure relief valve, comprising a valve seat and a valve body arranged in a first direction, and a diaphragm;

The valve seat is provided with a medium channel, a pressure relief channel and a protruding part positioned between the medium channel and the pressure relief channel, and the protruding part is arranged around the pressure relief channel;

The valve body comprises a shell and a valve core assembly, the valve core assembly is movably connected in the shell along the first direction, and the diaphragm is arranged between the valve core assembly and the protruding part;

when the pressure of the valve core assembly acting on the diaphragm is greater than or equal to the medium pressure in the medium channel, the diaphragm is abutted with the bulge so as to separate the medium channel from the pressure relief channel; and under the condition that the pressure of the valve core assembly acting on the diaphragm is smaller than the medium pressure in the medium channel, the diaphragm is out of abutting contact with the bulge part, so that the medium channel is communicated with the pressure relief channel to discharge part of the medium.

2. The pressure relief valve according to claim 1, wherein said valve seat further comprises a communication port provided at an end of said valve seat adjacent to said diaphragm and between said medium passage and said pressure relief passage, said communication port communicating with said medium passage and said pressure relief passage, respectively;

At least part of the protruding part extends into the communication port and protrudes towards the direction of the diaphragm, and at least part of the diaphragm extends into the communication port and abuts against the protruding part under the condition that the pressure of the valve core assembly acting on the diaphragm is larger than or equal to the medium pressure in the medium channel.

3. The pressure relief valve of claim 2, wherein the pressure relief passage has a first axis, the boss has a second axis, and the communication port has a third axis;

The first axis, the second axis and the third axis are coincident and parallel to the first direction.

4. The pressure relief valve of claim 1, wherein the valve body further comprises a cover disposed at an end of the housing facing away from the diaphragm, the cover being provided with a guide slot extending in a first direction;

A first bottom wall is arranged at one end of the shell, which is close to the diaphragm, and is provided with a first through hole which is coaxially arranged with the guide groove;

At least part of the valve core component, which is close to one end of the sealing cover, is in sliding connection with the guide groove, and at least part of the valve core component, which is close to one end of the first bottom wall, is in sliding connection with the first through hole, so that the valve core component moves along the first direction.

5. The pressure relief valve of claim 4, wherein said valve cartridge assembly comprises a valve cartridge body having a first end and a second end disposed away from each other in said first direction, said second end disposed away from said cover;

The first end is provided with a first guide part which is connected with the guide groove in a sliding way along the first direction; the second end is provided with a second guide part which is connected with the first through hole in a sliding way along the first direction so as to enable the valve core body to move along the first direction.

6. The pressure relief valve of claim 4, wherein the valve cartridge assembly comprises a valve cartridge body and a spring;

One end of the valve core body, which is close to the valve seat, is provided with a limiting protrusion along the circumferential direction, and the limiting protrusion is connected with the shell in a sliding manner; the limiting protrusion is provided with a first abutting surface and a second abutting surface which are arranged in a mutually deviating manner along the first direction, and the second abutting surface is abutted with at least part of the first bottom wall so as to limit the movement of the valve core body;

The spring is sleeved on the valve core body, the spring is provided with a third end and a fourth end which are arranged in a mutually deviating mode along the first direction, the third end is abutted to at least part of the sealing cover, the fourth end is abutted to the first abutting surface so as to limit the spring, and the movement of the valve core body is limited through the elastic action of the spring.

7. The pressure relief valve of claim 4, wherein a side of the first bottom wall adjacent the valve seat is provided with a first projection structure that abuts the diaphragm to limit flow of media into the valve body.

8. The pressure relief valve of claim 7, wherein said first projection arrangement comprises at least two annular projections, at least two of said annular projections being sequentially spaced apart along a radial direction of said first bottom wall.

9. The pressure relief valve of claim 4, wherein said cover is threadably coupled to said housing.

10. The pressure relief valve of claim 9, wherein in the first direction, the cover has a fifth end and a sixth end disposed away from each other, the sixth end being proximate the valve element assembly;

The fifth end is provided with a driving groove which is used for being matched with an external driving tool to drive the sealing cover to rotate to a preset position of the shell;

The guide groove is arranged at the sixth end and is communicated with the driving groove.

11. An air suspension for a vehicle, comprising an air compressor, wherein a pressure relief valve according to any one of claims 1-10 is provided in the air circuit of the air compressor.

12. A vehicle comprising the air suspension of claim 11.