CN220249042U - Explosion-proof relief valve - Google Patents

Abstract

The utility model relates to the technical field of explosion-proof valves, and particularly discloses an explosion-proof pressure relief valve. The explosion-proof pressure release valve comprises a valve body, a sealing element and an elastic element; the valve body is provided with a fluid channel communicated with the first end and the second end; the sealing element is arranged at the first end of the valve body, and the elastic element is in functional connection with the sealing element and elastically promotes the sealing element to cooperatively seal the first end of the fluid channel along the direction from the first end to the second end. The explosion-proof pressure release valve has the advantages of few whole parts, no need of glue fastening, easy assembly, small tolerance, low assembly and production cost, good reliability and production stability and wide application range. In addition, the sealing piece in the explosion-proof pressure release valve adopts the combined design of the sealing cover and the air holes, so that the explosion-proof pressure release and the waterproof and breathable effects can be realized while the explosion-proof pressure release is ensured.

Description

Explosion-proof relief valve

Technical Field

The utility model relates to the technical field of explosion-proof valves, in particular to an explosion-proof pressure relief valve.

Background

The explosion-proof valve has the functions of timely pressure relief and explosion prevention, so that potential safety hazards can be timely eliminated, disaster risks are reduced, and the explosion-proof valve has wide application in the aspects of automobile storage batteries, chemical production and the like.

At present, the spring type explosion-proof valve on the market generally consists of 10 or more parts, the number of the parts is numerous, and a plurality of parts are bonded by glue, so that the cost is high due to complex process, and the reliability is low. Meanwhile, the structure adopts the silica gel ring as a dynamic sealing part, and the shaft sleeve is used for grading and matching to improve the matching precision of the moving part, so that the defects of poor dynamic sealing stability, water leakage, silt feeding due to opening and closing and the like caused by movement deflection are overcome. However, the number of parts is large, which results in a long tolerance chain, and the problems of insufficient roundness and easy deformation of the movable seal ring, which results in poor mass production stability and high production cost.

Disclosure of Invention

The utility model aims to solve the problems of high production cost, low reliability and poor production stability caused by multiple parts in the existing explosion-proof pressure release valve.

The aim of the utility model is achieved by the following technical scheme.

An explosion-proof pressure release valve comprises a valve body, a sealing element and an elastic element;

the valve body is provided with a fluid channel communicated with the first end and the second end; the sealing element is arranged at the first end of the valve body, and the elastic element is in functional connection with the sealing element and elastically promotes the sealing element to cooperatively seal the first end of the fluid channel along the direction from the first end to the second end.

In a preferred embodiment, the explosion-proof pressure relief valve is provided with a guide post;

the first end of the guide post axially penetrates through the first end of the valve body and is in operative connection with the sealing element; the elastic piece is arranged between the second end of the valve body and the second end of the guide post in a compressed mode, and two ends of the elastic piece are respectively connected with the second end of the valve body and the second end of the guide post in an action mode.

In a further preferred embodiment, the valve body is provided with a limiting guide hole, and the first end of the guide post penetrates through the limiting guide hole to the first end of the valve body in a limiting mode.

In a further preferred embodiment, the fluid channels comprise a plurality of fluid channels and are distributed radially outside the limit pilot holes.

In a further preferred embodiment, a limit guide is provided, the limit guide hole and the fluid channel being provided on the limit guide, the limit guide being fitted on the valve body.

In a further preferred embodiment, the valve body is provided with a second positioning step hole; the limiting guide piece is in operative connection with the elastic piece, and is tightly pressed and assembled on the second positioning step hole by the elastic piece.

In a further preferred embodiment, the elastic member comprises a spring, and the spring is sleeved on the guide post.

In a further preferred embodiment, the spring housing is provided with a spring protection cover.

In a further preferred embodiment, the seal is fixedly connected to the first end of the guide post.

In a further preferred embodiment, a protective cover is arranged on the side of the valve body facing away from the second end; the protective cover is connected with the first end of the guide post, and the sealing piece is limited between the protective cover and the valve body.

In a further preferred embodiment, the protective cover is provided with a connector protruding towards the valve body, and the connector is in threaded connection with the first end of the guide post; the sealing element is sleeved on the guide post.

In a preferred embodiment, the second end of the valve body has a mounting portion protruding in a direction away from the first end, the mounting portion being provided with threads.

In a further preferred embodiment, a gasket is provided on the mounting portion.

In a preferred embodiment, the second end of the valve body has a mounting catch arranged convexly in a direction away from the first end.

In a preferred embodiment, the second end of the valve body is provided with a mounting screw hole, and the second end of the valve body is provided with a mounting flange.

In a preferred embodiment, the explosion proof pressure relief valve of any one of the above, the seal comprises a sealing cap; the first end of the valve body is provided with a first positioning step hole communicated with the fluid channel, and the second end of the sealing cover is provided with a molded surface matched with the first positioning step hole.

In a further preferred embodiment, the profile comprises a ramp and a cylindrical surface, which are connected in sequence from the first end to the second end.

In a further preferred embodiment, the sealing cover is provided with ventilation holes penetrating in the thickness direction of the sealing cover.

In a further preferred embodiment, the seal further comprises a breathable membrane covering the vent.

In a further preferred embodiment, the second end of the sealing cover is provided with an air passage communicated with the air vent in a direction intersecting with the thickness direction.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

according to the explosion-proof pressure relief valve, the sealing element is elastically matched and sealed at one end of the valve body under the action of the elastic element, when the pressure of pressure relief is large, the pressure of fluid acts on the sealing element and enables the elastic element to be compressed, so that a pressure relief channel between the sealing element and the valve body is opened, the fluid can be quickly discharged, quick pressure relief is realized, and the sealing element can be matched with the sealing valve body again under the elastic action of the elastic element after pressure relief is finished.

The explosion-proof pressure release valve based on the structural design has the advantages of few integral parts, no need of glue fastening, easy assembly, small tolerance, low assembly and production cost and good reliability and production stability.

The sealing element is connected with the elastic element through the guide pillar, the elastic element is arranged on one side of the valve body, deviating from the sealing element, pressure release of the sealing element and sealed telescopic movement are carried out along the axial limit of the guide pillar, the matched molded surface formed by the slope surface and the cylindrical surface is matched with the valve body in a sealing way, dynamic sealing of the silica gel ring is replaced, a tolerance chain is shortened, high-stability assembly can be achieved without grading, and the problems of water leakage, silt opening and closing and the like caused by poor stability due to dislocation between the sealing element and the valve body caused by movement deflection are avoided. Moreover, can set up threaded installation department, buckle or configuration flange on the valve body to realize different application installations, application scope is wide.

In addition, the sealing piece adopts the combined design of the sealing cover and the ventilation holes, so that ventilation under smaller pressure can be realized while explosion-proof pressure relief is ensured, and the explosion-proof pressure relief and water-proof ventilation effects are realized.

Drawings

Fig. 1 is a schematic perspective view of an explosion-proof pressure release valve according to an embodiment of the present utility model in a top view;

fig. 2 is a schematic perspective view of an explosion-proof pressure release valve according to an embodiment of the present utility model in a bottom view;

FIG. 3 is a schematic diagram of a disassembled structure of an explosion-proof pressure relief valve with a limit guide integral with a valve body;

FIG. 4 is a schematic diagram of a disassembled structure of an explosion-proof relief valve with a mounting portion provided on a valve body independent of a positioning guide and the valve body;

FIG. 5 is a schematic diagram of a disassembled structure of an explosion-proof pressure relief valve with a flange configured on a valve body with a limit guide independent of the valve body;

FIG. 6 is a schematic cross-sectional view of an explosion-proof pressure relief valve with a flange disposed on the valve body;

FIG. 7 is a schematic perspective view of the valve body in a top view;

FIG. 8 is a schematic diagram of an assembled structure of the limit guide and the valve body;

FIG. 9 is a schematic perspective view of a valve body configured with a limit guide;

FIG. 10 is a schematic top view of a valve body configured with a limit guide;

FIG. 11 is a schematic cross-sectional structural view of a valve body configured with a limit guide;

FIG. 12 is a schematic perspective view of a seal cover in a top view;

fig. 13 is a schematic perspective view of the sealing cover in the bottom view.

The drawings are marked: 1-valve body, 101-first positioning step hole, 102-second positioning step hole, 103-positioning protrusion, 104-installation part, 105-installation screw hole, 2-limit guide piece, 201-limit guide hole, 202-fluid channel, 3-sealing cover, 301-molded surface, 3011-slope surface, 3012-cylindrical surface, 302-ventilation hole, 303-air channel, 304-positioning groove, 4-ventilation membrane, 5-elastic piece, 6-guide pillar, 601-positioning step, 602-assembly screw hole, 7-spring protection cover, 8-protection cover, 801-connector, 9-sealing gasket, 10-installation flange.

Detailed Description

The technical scheme of the present utility model is described in further detail below with reference to specific examples and drawings, but the scope and embodiments of the present utility model are not limited thereto.

In the description of the specific embodiments, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", etc., are directions or positional relationships based on those shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put when used, and terms such as "first", "second", etc., are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the structures or elements to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model, but rather as indicating or suggesting relative importance.

Unless specifically stated or limited otherwise, the terms "mounted," "configured," "connected," "secured," and the like should be construed broadly, as they may be either fixedly connected, detachably connected, or integrally formed; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Example 1

The explosion-proof pressure release valve can be used for explosion-proof pressure release control of battery storage battery and the like. Referring to fig. 1 to 6, the explosion-proof relief valve includes a valve body 1, a sealing member and an elastic member 5.

The valve body 1 may be specifically designed as a cylindrical structure, which has a first end and a second end along the axial direction of the cylinder, and in the illustrated embodiment, corresponds to an upper end and a lower end, respectively. The valve body 1 is provided with a fluid channel 202, and the fluid channel 202 may specifically be disposed through along the axial direction of the valve body 1, that is, the fluid channel 202 is communicated with the first end and the second end of the valve body 1, and can allow gas or liquid to circulate between the first end and the second end.

The seal is in particular arranged at the first end of the valve body 1, and the elastic member 5 is operatively connected to said seal and elastically urges the seal in the direction from the first end to the second end, i.e. from top to bottom, to seal the first end of the fluid channel 202.

When the explosion-proof pressure relief device is used, the valve body 1 is fixedly arranged on the shell of the explosion-proof pressure relief device, the first end is located at the outer side far away from the explosion-proof pressure relief device, the second end is communicated with the inner cavity of the explosion-proof pressure relief device, namely the fluid channel 202 is communicated with the explosion-proof pressure relief device, and the explosion-proof valve and the inner cavity of the explosion-proof pressure relief device form a whole.

The position of the sealing member on the first end of the fluid channel 202 along the axial direction of the valve body 1 is elastically changeable based on the elastic action of the elastic member 5, i.e. the sealing member always keeps a trend of tightly fitting on the first end of the valve body 1 from the first end to the second end under the elastic force of the elastic member 5 to seal the fluid channel 202. Normally, the sealing member seals the first end of the fluid channel 202 under the elastic action of the elastic member 5, so as to prevent foreign matters such as water and dust from entering the housing. And when fluid flows out of the fluid channel 202 from the second end to the first end, the pressure of the fluid acts on the sealing element, so that the sealing element is driven to move from the second end to the first end, and even when the fluid pressure reaches a rated value, the sealing element is pushed to leave the valve body 1 from the second end to the first end, so that the fluid channel 202 is opened for explosion-proof pressure relief. After explosion-proof pressure relief is completed, the sealing element is promoted to return to a sealing normal state under the elastic action of the elastic element 5.

In particular, the elastic member 5 may be, but is not limited to, a spring or a leaf spring. The two ends of the elastic piece 5 are respectively connected with the sealing piece and the valve body 1 in an action mode, wherein the elastic piece 5 can be arranged between the first end of the valve body 1 and the sealing piece, and the sealing piece is driven to be matched with the sealing fluid channel 202 through elastic traction force generated by contraction action, and is stretched when the explosion-proof pressure relief opens the flow channel 202; alternatively, the elastic member 5 may be disposed on the second end of the valve body 1 and operatively connected to the sealing member by a guide member, where the elastic member 5 is disposed between the second end of the guide member and the second end of the valve body 1 in a compressed manner, and pushes the guide member to move from the first end to the second end by the elastic force generated by the stretching action, so as to cause the sealing member to cooperate with the sealing fluid channel 202, and to be compressed when the anti-explosion pressure relief opens the fluid channel 202.

In a preferred embodiment, the guide employed may comprise a guide post 6. Wherein the guide post 6 has a main body part which is axially corresponding to the axial length of the valve body 1, and the first end of the guide post 6 axially penetrates to the first end of the valve body 1 and is in operative connection with the sealing element; the elastic member 5 is disposed between the second end of the valve body 1 and the second end of the guide post 6 in a compressed manner, and both ends of the elastic member are respectively operatively connected with the second end of the valve body 1 and the second end of the guide post 6. Under the elastic force of the compressed elastic member 5, the guide post 6 maintains a moving trend in the direction from the first end to the second end, so that the sealing member operatively connected to the first end of the guide post 6 maintains a trend of tightly fitting on the first end of the valve body 1 from the first end to the second end to seal the fluid passage 202.

In some preferred embodiments, the sealing member may be configured to be fixedly connected to the first end of the guide post 6 directly, such as by being fixed by a screw or a snap, so as to synchronize the movement of the sealing member and the guide post 6.

Alternatively, an action connector may be provided to synchronize the movement of the sealing member with the guide post 6 in the direction from the first end to the second end, and facilitate the assembly and disassembly of the guide post 6, the elastic member 5, and the like.

As in other preferred embodiments, a protective cover 8 is provided on the side of the valve body 1 facing away from the second end, i.e. the first side of the valve body 1; the protective cover 8 is connected with the first end of the guide post 6, can move synchronously with the guide post 6 in the axial direction, and the sealing element is limited between the protective cover 8 and the valve body 1. Specifically, preferably, the protecting cover 8 is provided with a connector 801 protruding towards the valve body 1, and the first ends of the connector 801 and the guide post 6 are provided with screw structures in mutual screwing, for example, an external screw thread is arranged on the connector 801, and the first end of the guide post 6 is provided with an assembly screw hole 602 with an internal screw thread, and the connector 801 is in screw connection with the first end of the guide post 6 through the screw structures in mutual matching; the sealing element is sleeved on the guide post 6 and is limited by the protective cover 8 to prevent the sealing element from falling out of the first end of the guide post 6, and the protective cover 8 also plays a role in protecting the sealing element.

Therefore, when the guide post 6 moves or tends to move along the direction from the first end to the second end under the action of the elastic member 5, the guide post 6 drives the protective cover 8 to move or tends to move along the direction from the first end to the second end, and the sealing member cooperates with and seals the first end of the fluid channel 202 along the direction from the first end to the second end under the action of the protective cover 8. When the fluid pushes the sealing element to move along the direction from the second end to the first end so as to open the fluid channel 202 for explosion-proof pressure relief, the sealing element pushes the protective cover 8 away along the direction from the second end to the first end, and the second end of the guide post 6 moves close to the valve body 1 and compresses the elastic element 5, so that the fluid channel 202 can be opened under rated pressure and elastic reset of the sealing element is ensured.

In the embodiment that the elastic piece 5 is preferably a spring, the spring is sleeved on the guide post 6, so that the elastic piece 5 has stable elastic acting force along the axial direction, and the stable reset pushing action of the guide post 6 in the axial direction is ensured, the reset precision of the sealing piece is further ensured, the long-term use precision of the explosion-proof pressure release valve is ensured, and the service life is prolonged.

In some preferred embodiments, the two ends of the elastic member 5 may be fixedly connected to the second end of the valve body 1 and the second end of the guide post 6, respectively; or, the two ends of the elastic member 5 may be respectively abutted to the second end of the valve body 1 and the second end of the guide post 6, specifically, a positioning step 601 is provided on the second end of the guide post 6, the second end of the elastic member 5 is abutted to the positioning Tan Jie 601, and the other end of the elastic member abuts against the valve body 1, so that the elastic member 5 can ensure the elastic effect of the elastic member on the sealing member, and meanwhile, the disassembly and assembly of the elastic member 5, the guide post 6 and other components are further facilitated.

In a further preferred embodiment, as shown in fig. 7, the valve body 1 is provided with a limit guiding hole 201, and the limit guiding hole 201 is adapted to the shape of the main body of the guide post 6 and has an axial direction consistent with the telescopic axial direction of the guide post 6. The first end of the guide post 6 is limited to penetrate through the first end of the valve body 1 from the limiting guide hole 201, the telescopic movement of the guide post 6 driven by the protective cover 8 and the elastic piece 5 is limited in the radial direction by the limiting guide hole 201, the stability of the telescopic movement of the guide post 6 is further improved, and accordingly the resetting precision of the sealing piece is improved.

Optionally, the fluid channel 202 has an axial extension direction consistent with the spacing guide hole 201, and the fluid channel 202 is specifically disposed outside the spacing guide hole 201. The number of the fluid channels 202 may be several, and the several fluid channels 202 are distributed on the radial outer side of the limit guiding hole 201, in the illustrated embodiment, the number of the fluid channels 202 is three and are uniformly distributed on the radial outer periphery of the limit guiding hole 201.

Specifically, referring to fig. 3 again, the limit guide hole 201 and the fluid channel 202 may be integrally formed on the valve body 1, or referring to fig. 4 and 5 again, the main body of the valve body 1 and the limit guide hole 201 and the fluid channel 202 thereon may be designed to be assembled separately, so as to facilitate assembly and maintenance of the valve body 1.

In some preferred embodiments, as shown in fig. 8 to 11, the main body of the valve body 1 is a mounting cylinder, the middle of which has a through hole penetrating in the axial direction, and the valve body 1 is configured with a limit guide 2. Wherein the limit guide hole 201 and the fluid channel 202 are arranged on the limit guide 2, and in use, the limit guide 2 is assembled on the through hole of the valve body 1, thereby forming a complete integral valve body 1.

In a further preferred embodiment, the valve body 1 has a positioning protrusion 103 protruding toward the center at a position in the middle of the inner wall of the through hole, and the through hole of the valve body 1 is partitioned by the positioning protrusion 103 into a first positioning stepped hole 101 near the first end and a second positioning stepped hole 102 near the second end.

Moreover, the apertures of the first positioning step hole 101 and the second positioning step hole 102 are larger than the inner diameter of the positioning protrusion 103, and the external dimension of the limit guide 2 is adapted to the aperture of the second positioning step hole 102. When the explosion-proof pressure relief valve is assembled, the limiting guide piece 2 is in functional connection with the elastic piece 5, and the elastic piece 5 is tightly assembled on the second positioning step hole 102 under the action of elastic pressure and tightly pushes against the positioning protrusion 103, so that the fixed assembly of the limiting guide piece 2 is realized.

The assembled fluid channel 202 on the limit guide 2 is mutually communicated with the first positioning step hole 101 and the second positioning step hole 102 on the valve body 1, and the sealing element is matched and sealed on the first positioning step hole 101 in the matched and sealed circulation channel 202 of the valve body 1 under the action of the elastic element 5, so that the elastic sealing of the circulation channel 202 is realized, wherein the arranged protective cover 8 can be positioned and assembled into the first positioning step hole 101 together with the sealing element.

Furthermore, the elastic member 5 is provided with a spring protection cover 7. Specifically, the spring protection cover 7 is a cover body with an open first end and a closed second end, and the open end is fixedly assembled on the valve body 1 to cover and protect the elastic member 5 and the guide post 6. In an alternative embodiment, the limiting guide piece 2 can be provided with a clamping part with the outer diameter larger than that of the elastic piece 5, and one end of the opening of the spring protection cover 7 is tightly clamped on the clamping part through interference fit, so that the assembly and disassembly are convenient.

Example two

In the explosion-proof pressure release valve of this embodiment, as shown in fig. 3, the second end of the valve body 1 has a mounting portion 104 protruding along a direction away from the first end, and when the explosion-proof pressure release valve is installed, the mounting portion 104 can be fixedly connected with a housing of the pressure release device to be explosion-proof.

In a preferred embodiment, the mounting portion 104 is provided with threads, which may specifically be external threads, and may be assembled in a screwed manner with a threaded structure of a housing of the pressure relief device to be explosion-proof, so that the mounting portion is convenient to disassemble and assemble.

In a further preferred embodiment, the mounting portion 104 is further provided with a gasket 9. When the mounting part 104 is fixedly assembled with the shell of the pressure relief equipment to be explosion-proof, the sealing gasket 9 can be used for sealing and protecting, so that the tightness between the explosion-proof valve and the inner cavity of the shell of the pressure relief equipment to be explosion-proof is ensured.

Example III

The explosion-proof pressure release valve of this embodiment is similar to the first embodiment, and further, in the explosion-proof pressure release valve of this embodiment, the second end of the valve body 1 has an installation buckle that protrudes along the direction that deviates from the first end and sets up. When the explosion-proof pressure release valve is used and installed, the installation buckle can be directly clamped and fixedly installed with the shell of the explosion-proof pressure release equipment to be subjected to clamping, the assembled explosion-proof pressure release valve is not easy to fall off from the shell of the explosion-proof pressure release equipment to be subjected to axial direction of the valve body 1, and the installation efficiency is high.

Example IV

In the explosion-proof pressure release valve of the present embodiment, as shown in fig. 5 and 6, a plurality of mounting screw holes 105 are formed at the second end of the valve body 1, and a mounting flange 10 is disposed at the second end of the valve body 1, wherein the mounting flange 10 has a plurality of assembly holes corresponding to the plurality of mounting screw holes 105 one by one.

When the explosion-proof pressure release valve is used and installed, the installation screw holes 105 and the installation flange 10 can be matched with screws to be fixedly connected with the shell of the explosion-proof pressure release equipment, and the installation stability is good.

Example five

The explosion-proof pressure relief valve of the present embodiment is similar to any one of the first to fourth embodiments, further referring to fig. 3 to 5, in the explosion-proof pressure relief valve of the present embodiment, the sealing member includes a sealing cover 3.

Specifically, referring to fig. 12 and 13, the second end of the sealing cap 3 has a profile 301. The profile 301 is specifically a surface adapted to the first positioning step hole 101, so as to be capable of being closely adapted to the first positioning step hole 101 under the elastic action of the elastic member 5 to achieve a good sealing action.

In a preferred embodiment, the first positioning step hole 101 on the first end of the valve body 1 has a large aperture portion far from the first end and a small aperture portion for communicating with the second positioning step hole 102, and referring again to fig. 13, the molded surface 301 includes two portions of a slope 3011 and a cylindrical surface 3012, wherein the slope 3011 and the cylindrical surface 3012 are sequentially connected from the first end to the second end and are respectively adapted to the large aperture portion and the small aperture portion of the first positioning step hole 101, and the radial dimension of the outer edge of the molded surface 301 far from the cylindrical surface 3012 of the sealing cover 3 is larger than the large aperture dimension of the first positioning step hole 101. Therefore, when the sealing cover 3 is matched on the first positioning step hole 101 from the first end to the second end, the slope surface 3011 and the cylindrical surface 3012 are tightly matched with two sections of hole parts of the first positioning step hole 101, so that the assembly tightness is ensured, and the tolerance chain is shortened.

In a further preferred embodiment, the sealing cover 3 is provided with ventilation holes 302 penetrating in the thickness direction of the sealing cover 3, i.e. communicating the first end and the second end of the sealing cover 3. When the sealing cover 3 is matched and sealed on the first positioning step hole 101, the fluid channel 202 is communicated through the ventilation holes 302 on the sealing cover 3. The ventilation holes 302 may be formed in a plurality of, for example, three, which are uniformly distributed. Therefore, a trace amount of added gas in the pressure relief equipment to be explosion-proof can leak out through the air holes 302, so that gas exchange is realized; when the pressure of the gas reaches the rated value, the venting capacity of the vent holes 302 is insufficient to release pressure, the gas can push the sealing cover 3 open, so that a large venting channel is opened, and the gas can be leaked out rapidly, thereby achieving the purpose of rapid venting.

In a further preferred embodiment, referring again to fig. 3-5, the seal further comprises a breathable membrane 4, wherein the breathable membrane 4 covers the breathable aperture 302. The breathable membrane 4 is a membrane with waterproof and breathable functions, and gas exhausted from the ventilation holes 302 can be exhausted through the breathable membrane 4, and meanwhile, external water can be prevented from entering the to-be-explosion-proof pressure relief equipment, so that the explosion-proof valve achieves the effects of explosion-proof pressure relief, water prevention and ventilation.

In a specific embodiment, a positioning groove 304 covering the ventilation hole 302 is provided on the second end side of the sealing cover 3, and the ventilation membrane 4 is positioned and accommodated in the positioning groove 304 to ventilate and waterproof the ventilation hole 302.

In some preferred embodiments, when the protective cover 8 is arranged to realize the functional connection of the sealing cover 3 and the guide post 6, the air-permeable membrane 4 and the sealing cover 3 are sleeved on the guide post 6, and the air-permeable membrane 4 is limited in the positioning groove 304 by the protective cover 8, so that the stable installation of the air-permeable membrane 4 is ensured, and the explosion-proof pressure-releasing waterproof air-permeable effect of the explosion-proof valve is ensured.

Further, in the arrangement of the protective cover 8 in the positioning groove 304, the second end of the sealing cover 3 is provided with an air passage 303 in a direction intersecting with the thickness direction, and the air passage 303 is communicated with the air hole 302. In a specific assembly use, the ventilation holes 302 are communicated with the air passages 303 after passing through the ventilation membrane 4.

Thus, after the portion including the protective cover 8, the sealing cover 3, and the air-permeable membrane 4 is sealingly fitted to the first positioning step hole 101 of the valve body 1, the air leaked through the air-permeable opening 302 can leak out through the air passage 303 from the gap between the protective cover 8, the sealing cover 3, and the wall of the first positioning step hole 101, so as to ensure the ventilation. The air passage 303 may be formed in a plurality of, for example, four, air passages 303 are ensured to be breathable.

The above embodiments are merely preferred embodiments of the present utility model and only the technical solutions of the present utility model have been described in further detail, but the above description is illustrative, not exhaustive, and is not limited to the disclosed embodiments, the scope and implementation of the present utility model are not limited thereto, and any changes, combinations, deletions, substitutions or modifications made without departing from the spirit and principles of the present utility model are included in the scope of the present utility model.

Claims (10)

1. An explosion-proof pressure release valve is characterized by comprising a valve body, a sealing element and an elastic element;

the valve body is provided with a fluid channel communicated with the first end and the second end; the sealing element is arranged at the first end of the valve body, and the elastic element is in functional connection with the sealing element and elastically promotes the sealing element to cooperatively seal the first end of the fluid channel along the direction from the first end to the second end.

2. The explosion-proof pressure relief valve according to claim 1, wherein a guide post is provided;

the first end of the guide post axially penetrates through the first end of the valve body and is in operative connection with the sealing element; the elastic piece is arranged between the second end of the valve body and the second end of the guide post in a compressed mode, and two ends of the elastic piece are respectively connected with the second end of the valve body and the second end of the guide post in an action mode.

3. The explosion-proof pressure release valve according to claim 2, wherein a limiting guide hole is formed in the valve body, and the first end of the guide post penetrates through the limiting guide hole to the first end of the valve body in a limiting manner; the fluid channels comprise a plurality of fluid channels and are distributed on the radial outer side of the limiting guide holes.

4. The explosion-proof pressure relief valve according to claim 2, wherein a side of the valve body facing away from the second end is provided with a protective cover; the protective cover is connected with the first end of the guide post, and the sealing piece is limited between the protective cover and the valve body.

5. The explosion proof pressure relief valve according to claim 1, wherein the second end of the valve body has a mounting portion protruding in a direction away from the first end, the mounting portion having threads disposed thereon.

6. The explosion-proof pressure relief valve according to claim 1, wherein the second end of the valve body is provided with a mounting screw hole, and the second end of the valve body is provided with a mounting flange.

7. The explosion protection pressure relief valve according to any one of claims 1-6, wherein said seal comprises a sealing cap; the first end of the valve body is provided with a first positioning step hole communicated with the fluid channel, and the second end of the sealing cover is provided with a molded surface matched with the first positioning step hole.

8. The explosion-proof pressure relief valve according to claim 7, wherein said profile comprises a ramp and a cylindrical surface, said ramp and cylindrical surfaces being connected in sequence from a first end to a second end.

9. The explosion-proof pressure release valve according to claim 7, wherein the sealing cover is provided with ventilation holes penetrating in the thickness direction of the sealing cover.

10. The explosion-proof pressure relief valve according to claim 9, wherein said seal further comprises a vent membrane covering said vent; the second end of the sealing cover is provided with an air passage communicated with the air holes in the direction intersecting with the thickness direction.