Explosion-proof valve

Abstract

The utility model relates to the technical field of anti-explosion valves, and discloses an anti-explosion valve which comprises a valve body provided with an inner cavity. The waterproof breathable structure is arranged in the inner cavity and comprises a breathable valve cover and a waterproof breathable film, a gap is formed between the breathable valve cover and the valve body, and the inner cavity is communicated with the external environment through the gap; and the pressure relief valve cover is arranged on one side of the ventilation valve cover and rotationally connected with the ventilation valve cover, and the pressure relief valve cover is connected with the valve body in a sealed mode. The utility model has the technical effects that the structure is simple, the requirement on the assembly process is low, and the production cost of the product is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of explosion-proof valve, specifically relates to an explosion-proof valve. BACKGROUND

[0002] In order to avoid the explosion accident, battery pack will set up explosion-proof valve as explosion-proof means, explosion-proof valve refers to the device that realizes explosion-proof by controlling internal air pressure, when the inside of battery pack occurs abnormal condition, such as overcharge, overdischarge, temperature is too high etc., gas expands, the pressure in the inside of battery pack increases and exceeds the set value, explosion-proof valve opens automatically to release gas, battery pack releases pressure through explosion-proof valve to reduce internal air pressure, thereby preventing the occurrence of explosion accident.

[0003] In the existing spring type explosion-proof valve, spring type explosion-proof valve can include main body, the vent hole for releasing pressure is set up on the main body, the guide rod is arranged on the main body, the one end of the guide rod is provided with the piston, in normal state, the piston is sealedly connected with the main body to ensure the airtightness. The vent hole is set up on the piston, the waterproof air permeable membrane is arranged at the vent hole of the piston, and the explosion-proof valve can balance the air pressure difference between the inside and outside of the battery pack through the waterproof air permeable membrane. The spring is arranged between the guide rod and the main body, when the pressure in the inside of battery pack increases and exceeds the set value, the gas in the inside of battery pack pushes the piston to move outward, so that the piston is separated from the main body and forms the pressure relief gap, and the explosion-proof valve plays the explosion-proof role.

[0004] However, the structure of the existing explosion-proof valve is complex, the assembly process requirement is higher, and then the production cost of explosion-proof valve product is improved. INVENTION CONTENTS

[0005] In order to solve the insufficient of the prior art, the utility model provides an explosion-proof valve, its structure is simple and low to the assembly process requirement, is favorable to the reduction of the production cost of product.

[0006] The technical effect reached by the utility model is realized through the following technical aspects:

[0007] The utility model provides an explosion-proof valve, including the valve body, set up the inner chamber, waterproof air permeable structure is set up in the inner chamber, the waterproof air permeable structure includes the air permeable valve cover and waterproof air permeable membrane, the air permeable valve cover with the valve body between setting has the gap, the inner chamber through waterproof air permeable membrane and the gap with the outside environment is linked together, and the pressure relief valve cover is set up in one side of the air permeable valve cover, and with the air permeable valve cover rotatory joint, the pressure relief valve cover with the valve body sealedly connects.

[0008] In some implementations, the valve body comprises a mounting portion arranged in the inner cavity, a pressure relief hole and a gas permeation hole are arranged on the mounting portion, and the pressure relief hole and the gas permeation hole are in communication with the inner cavity, wherein the pressure relief valve cover is arranged corresponding to the pressure relief hole, and the waterproof gas permeation structure is arranged corresponding to the gas permeation hole.

[0009] In some implementations, the gas permeation valve cover is detachably connected with the mounting portion.

[0010] In some implementations, a connecting column is arranged on the mounting portion, a connecting sleeve is arranged on the gas permeation valve cover, and the connecting sleeve is in interference fit with the connecting column.

[0011] A connecting sleeve is arranged on the mounting portion, a connecting column is arranged on the gas permeation valve cover, and the connecting sleeve is in interference fit with the connecting column.

[0012] In some implementations, the pressure relief hole has a hole diameter greater than or equal to that of the gas permeation hole.

[0013] In some implementations, a buckling groove is arranged on the valve body, a protruding portion is arranged at the groove opening of the buckling groove, a buckling portion is arranged on the pressure relief valve cover, and the buckling portion is in clamping connection with the protruding portion when the buckling portion is clamped into the buckling groove.

[0014] In some implementations, a first sealing groove is arranged on the valve body, a first sealing ring is arranged in the first sealing groove, and the pressure relief valve cover is in sealing connection with the valve body through the first sealing ring.

[0015] In some implementations, a second sealing groove is arranged on the valve body, a second sealing ring is arranged in the second sealing groove, and the sealing ring is arranged on a side of the valve body away from the pressure relief valve cover.

[0016] In some implementations, a notch is arranged on the gas permeation valve cover, a rotating shaft is arranged in the notch, a rotating groove is arranged on the pressure relief valve cover, the rotating shaft is clamped into the rotating groove, and the pressure relief valve cover is in rotating connection with the rotating shaft.

[0017] In some implementations, the rotating shaft is eccentrically arranged on a side close to the waterproof gas permeation film.

[0018] In summary, the utility model has at least the following advantages:

[0019] The explosion-proof valve provided by the utility model can circulate gas in the channel formed by the gap and the inner cavity to balance the pressure difference between the inner side and the outer side of the valve body in the normal use state; when the gas pressure of the inner side of the valve body is greater than or equal to the set pressure value, the explosion-proof valve is in the explosion relief state, the pressure relief valve cover is rotatably connected with the air permeable valve cover, under the pressure action of the high-temperature and high-pressure gas of the inner side, the pressure relief valve cover is pushed open, the gas is rapidly discharged from the inner cavity to relieve pressure, the gas pressure of the inner side of the valve body is reduced, and the inner side and the outer side of the valve body restore the pressure balance state, so that the explosion-proof valve plays the explosion-proof role. Compared with the traditional spring type explosion-proof valve, the explosion-proof valve of the utility model has the advantages of simple structure, rotatable connection between the pressure relief valve cover and the air permeable valve cover, sealing connection between the valve body and the pressure relief valve cover, low assembly process requirement of the explosion-proof valve and low production cost of the product. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a top view of the explosion-proof valve in the closed state according to an embodiment of the utility model.

[0021] Figure 2 It is Figure 1 It is a B-B sectional view schematic diagram for showing the gas flow direction.

[0022] Figure 3 It is a top view of the explosion-proof valve in the open state according to an embodiment of the utility model.

[0023] Figure 4 It is Figure 3 It is a B-B sectional view schematic diagram for showing the gas flow direction.

[0024] Figure 5 It is an explosion schematic diagram of the explosion-proof valve according to an embodiment of the utility model.

[0025] Figure 6 It is Figure 5 It is an explosion schematic diagram from another angle.

[0026] Figure 7 It is a whole structure schematic diagram of the explosion-proof valve in the closed state according to an embodiment of the utility model.

[0027] Figure 8 It is a sectional view of the explosion-proof valve according to an embodiment of the utility model.

[0028] Figure 9 It is Figure 8 It is an enlarged schematic diagram of the A position.

[0029] Figure 10 It is a whole structure schematic diagram of the explosion-proof valve in the open state according to an embodiment of the utility model.

[0030] Markings in the drawing:

[0031] 1, valve body; 11, inner cavity; 12, mounting portion; 121, pressure relief hole; 122, air vent hole; 123, connecting column; 13, buckling groove; 131, protruding portion; 14, first sealing groove; 15, second sealing groove; 16, mounting hole; 161, bushing;

[0032] 2, waterproof air permeable structure; 21, air vent valve cover; 211, connecting sleeve; 212, notch; 213, rotating shaft; 22, gap; 23, waterproof air permeable film;

[0033] 3, pressure relief valve cover; 31, buckle portion; 32, rotating portion; 33, rotating groove;

[0034] 4, first sealing ring;

[0035] 5, second sealing ring. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0038] Example 1:

[0039] Please refer to the drawings Figures 1-4 The explosion-proof valve of the present application can be arranged in a battery pack to play an explosion-proof role in the case of thermal runaway of the battery pack.

[0040] Please refer to the drawings Figure 1 and Figure 2The utility model discloses an explosion -proof valve, including valve body 1, specifically, valve body 1 preferably but not limited to adopt plastic valve or metal valve, be provided with the inner chamber 11 for gas circulation on valve body 1, the waterproof gas -permeable structure 2 for blocking liquid and passing through gas is provided with in the inner chamber 11 of valve body 1, and the waterproof gas -permeable structure 2 includes gas -permeable valve cover 21 and waterproof gas -permeable membrane 23. Wherein, gas -permeable valve cover 21 sets up on valve body 1, and the gap 22 for gas circulation is provided between gas -permeable valve cover 21 and valve body 1, and the inner chamber 11 is connected with the outside environment through the gap 22, and the waterproof gas -permeable membrane 23 sets up in the inner chamber 11, and the waterproof gas -permeable membrane 23 sets up at the gas -permeable hole 122 and can block the moisture in the outside environment by valve body 1 enters the inside of battery pack, specifically, the waterproof gas -permeable membrane 23 preferably but not limited to adopt polytetrafluoroethylene film, polypropylene spun -bond non -woven fabric etc.

[0041] Under normal working conditions, when the air pressure outside the battery pack is greater than the air pressure inside, the gas of the outside environment enters the inner chamber 11 through the gap 22, and enters the inside of the battery pack through the waterproof gas -permeable membrane 23 to balance the pressure difference between the inside and the outside of the battery pack. When the air pressure outside the battery pack is less than the air pressure inside, the gas in the inside of the battery pack flows out of the valve body 1 through the inner chamber 11, the waterproof gas -permeable membrane 23 and the gap 22 in turn, and the inside and the outside of the battery pack realize pressure difference balance.

[0042] Valve body 1 is provided with pressure relief valve cover 3, and pressure relief valve cover 3 is arranged at one side of gas -permeable valve cover 21 and is rotationally connected with gas -permeable valve cover 21. As shown in some specific embodiments, pressure relief valve cover 3 and gas -permeable valve cover 21 are both semicircular covers to cover the valve port of valve body 1, the explosion -proof valve of the utility model can realize the function of explosion -proof while guaranteeing the pressure balance between the inside and the outside of the battery pack, it can be understood that this is not a specific limitation on the shape of pressure relief valve cover 3 and the shape of gas -permeable valve cover 21, and the person skilled in the art can adjust according to the actual shape of valve body 1.

[0043] Pressure relief valve cover 3 is sealingly connected with valve body 1, and in normal state, pressure relief valve cover 3 seals valve body 1, so that the gas only enters and exits valve body 1 through the gap 22 and the waterproof gas -permeable membrane 23.

[0044] Please refer to the accompanying Figure 3 And Figure 4When the explosion-proof valve is in a normal state, the gas flows in the channel formed by the gap 22 and the inner cavity 11 to balance the pressure difference between the inside and outside of the battery pack; when a large amount of smoke and heat is generated in the battery pack due to thermal runaway, causing the gas pressure in the battery pack to be greater than or equal to the pressure value set by the explosion-proof valve, the high-temperature and high-pressure gas enters the inner cavity 11 and pushes open the pressure relief valve cover 3, the pressure relief valve cover 3 rotates relative to the gas permeable valve cover 21, and the gas is quickly discharged from the pressure relief valve cover 3, the gas pressure in the battery pack is reduced, and the pressure balance between the inside and outside of the battery pack is restored, effectively reducing the probability of fire or explosion of the battery pack in thermal runaway. Compared with the traditional spring type explosion-proof valve, the explosion-proof valve of the utility model has simple structure, low assembly process requirement and low production cost.

[0045] Example 2:

[0046] The difference between this embodiment and example 1 is that the waterproof and breathable structure 2 of the utility model is further optimized in this embodiment, please refer to Figures 5-8 .

[0047] Please refer to Figure 5 and Figure 6 , the valve body 1 of this embodiment includes a mounting portion 12, the mounting portion 12 is arranged inside the inner cavity 11, the mounting portion 12 is provided with a pressure relief hole 121 and a gas permeable hole 122, the pressure relief hole 121 and the gas permeable hole 122 are both in communication with the inner cavity 11, wherein the pressure relief hole 121 and the inner cavity 11 can form a straight-through barrier-free pressure relief channel, which is beneficial to the rapid discharge of high-temperature and high-pressure gas when the battery pack is in thermal runaway.

[0048] At the same time, the pressure relief hole 121 is arranged corresponding to the pressure relief valve cover 3, and the gas permeable hole 122 is arranged corresponding to the gas permeable valve cover 21. As shown in some specific embodiments, the hole diameter of the pressure relief hole 121 is greater than or equal to the hole diameter of the gas permeable hole 122, which can facilitate the rapid discharge of the gas in the battery pack in a large area, but the above is not the only limitation on the size of the pressure relief hole 121 and the size of the gas permeable hole 122, and those skilled in the art can adjust the pressure relief hole 121 and the gas permeable hole 122 according to the actual set explosion-proof pressure value. Specifically, the waterproof and breathable membrane 23 is arranged in the gas permeable hole 122, and the waterproof and breathable membrane 23 can be fixed at the gas permeable hole 122 by ultrasonic welding, hot melt welding, bonding or interference fit with the mounting portion 12.

[0049] When the explosion-proof valve is in normal state, the pressure outside the battery pack is greater than the pressure inside the battery pack, and the gas in the external environment flows into the inside of the battery pack through the valve body 1. The gas in the external environment can enter the inside of the battery pack through the gap 22, the waterproof and breathable film 23, and the inner cavity 11 in sequence. When the pressure outside the battery pack is less than the pressure inside the battery pack, the gas in the battery pack enters the external environment through the inner cavity 11, the waterproof and breathable film 23, and the gap 22 in sequence, and the pressure difference is balanced.

[0050] In the preferred embodiments, the vent valve cover 21 is detachably connected with the mounting portion 12. As shown in some specific embodiments, the mounting portion 12 is provided with connecting columns 123, and the vent valve cover 21 is provided with connecting sleeves 211. The connecting sleeves 211 are in interference fit with the connecting columns 123. Alternatively, the mounting portion 12 can be provided with connecting sleeves 211, and the vent valve cover 21 can be provided with connecting columns 123. The vent valve cover 21 and the mounting portion 12 are fixed by interference fit of the connecting sleeves 211 and the connecting columns 123. Specifically, the connecting columns 123 and the connecting sleeves 211 are preferably but not limited to plastic or silicone parts, and the number of the connecting columns 123 and the connecting sleeves 211 is not limited. It can be understood that the above is not the only way to detachably connect the vent valve cover 21 and the mounting portion 12. In other specific embodiments, the vent valve cover 21 can be provided with clamping columns, and the mounting portion 12 can be provided with clamping grooves. The clamping columns are clamped in the clamping grooves to connect the vent valve cover 21 and the mounting portion 12. In addition, the vent valve cover 21 and the mounting portion 12 can be assembled by bolts. Through the above fixing methods of the vent valve cover 21 and the mounting portion 12, the mounting firmness of the vent valve cover 21 and the mounting portion 12 can be ensured, and the vent valve cover 21 can be prevented from being opened by mistake due to external vibration or impact in some special cases.

[0051] Please refer to the accompanying drawings Figure 7 and Figure 8 In the preferred embodiments, the vent valve cover 21 is provided with a gap 212, and the vent valve cover 21 is provided with a rotating shaft 213 at the gap 212. The rotating shaft 213 is horizontally arranged. The pressure relief valve cover 3 can be rotated relative to the rotating shaft 213 to open or cover the pressure relief hole 121. As shown in some specific embodiments, the rotating shaft 213 is eccentrically arranged on the side close to the waterproof and breathable film 23, i.e., the rotating shaft 213 is arranged on the side closer to the waterproof and breathable film 23. The reasonable space distribution between the vent valve cover 21 and the pressure relief valve cover 3 is beneficial to timely discharge of high-temperature and high-pressure gas from the pressure relief valve cover 3 in the explosion-proof state. Specifically, the pressure relief valve cover 3 includes a rotating portion 32. The rotating portion 32 is located at the gap 212. The rotating portion 32 and the vent valve cover 21 are provided with a clearance space for rotation of the pressure relief valve cover 3 relative to the vent valve cover 21. The rotating portion 32 is provided with a rotating groove 33. The rotating shaft 213 can be clamped in the rotating groove 33 and is in rotational connection with the rotating portion 32. The vent valve cover 21 and the pressure relief valve cover 3 are simple in structure and convenient to assemble.

[0052] The vent valve cover 21 is in interference fit with the mounting portion 12, the pressure relief valve cover 3 is rotationally connected with the vent valve cover 21, and the design of the vent valve cover 21 and the pressure relief valve cover 3 is conducive to reducing the probability of false opening of the valve cover under external forces such as vibration and impact, thereby improving the safety in use.

[0053] Embodiment 3

[0054] The difference between this embodiment and the above embodiments is that the waterproof and breathable structure 2 of the utility model is further optimized in structure, please refer to Figures 7-10 .

[0055] Please refer to Figure 8 , the first sealing groove 14 is provided on the mounting portion 12, the first sealing groove 14 is provided outside the pressure relief hole 121, and the first sealing ring 4 is arranged in the first sealing groove 14. Specifically, the first sealing ring 4 is preferably but not limited to a rubber or silicone sealing ring, the first sealing ring 4 is arranged outside the pressure relief hole 121, and the pressure relief valve cover 3 is sealingly connected with the valve body 1 through the first sealing ring 4 to ensure the sealing property of the pressure relief valve cover 3 in the normal use state. As shown in some specific embodiments, a plurality of first protrusions are provided on the first sealing ring 4, and the first sealing ring 4 is in interference fit with the valve body 1 in the first sealing groove 14, which is conducive to improving the sealing performance.

[0056] The second sealing groove 15 is provided on the side of the mounting portion 12 away from the pressure relief valve cover 3, the second sealing groove 15 is provided outside the pressure relief hole 121 and the vent hole 122, and the second sealing ring 5 is arranged in the second sealing groove 15. Specifically, the second sealing ring 5 is preferably but not limited to a rubber or silicone sealing ring, the second sealing ring 5 is arranged outside the pressure relief hole 121 and the vent hole 122, and the valve body 1 can be sealingly connected with the sealed box body of the battery pack through the second sealing ring 5. As shown in some specific embodiments, a plurality of second protrusions are provided on the second sealing ring 5, and the second sealing ring 5 is in interference fit with the valve body 1 in the second sealing groove 15, which is conducive to improving the sealing property of the connection between the valve body 1 and the sealed box body of the battery pack.

[0057] Please refer to the accompanying Figure 7 In the preferred embodiment, the mounting hole 16 is provided on the valve body 1, and specifically, two mounting holes 16 are provided. In some other specific embodiments, three or four mounting holes 16 can also be provided. The bushing 161 is arranged in the mounting hole 16 of the valve body 1, and when the valve body 1 is made of plastic, the provision of the bushing 161 is conducive to the installation of the valve body 1 on the battery pack. The valve body 1 can be sealingly connected with the sealed box body of the battery pack at the mounting hole 16.

[0058] Please refer to the accompanying Figures 8-10In the preferred embodiment, the mounting portion 12 is provided with a buckling groove 13, the buckling groove 13 is annularly arranged along the hole wall of the pressure relief hole 121, the inner wall of the mounting portion 12 is outwardly protruded to form a protruding portion 131 at the groove opening of the buckling groove 13, the pressure relief valve cover 3 comprises a clamping portion 31, specifically, the clamping portion is a hook-shaped end portion, when the pressure relief valve cover 3 is covered above the pressure relief hole 121, the clamping portion 31 is clamped into the buckling groove 13, the clamping portion 31 is clamped and connected with the protruding portion 131, so that the pressure relief valve cover is fixedly mounted on the valve body, when the pressure inside the battery pack does not reach the preset pressure value of the explosion-proof valve, the pressure relief valve cover 3 is not opened by turning over, and the clamping portion 31 cooperates with the protruding portion 131 to limit the pressure relief valve cover 3 from being turned over at will. When the gas pressure inside the battery pack reaches the pressure value set by the explosion-proof valve, the gas inside the battery pack flows to the pressure relief valve cover 3 through the inner cavity 11 and the pressure relief hole 121 and lifts up the pressure relief valve cover 3, the clamping portion 31 is separated from the protruding portion 131 and pulled out from the buckling groove 13 to discharge and relieve pressure. The pressure relief valve cover 3 is convenient to disassemble and assemble with the valve body 1 and has good sealing performance.

[0059] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "link", "fix" and the like should be understood in broad sense, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0060] In the description of the utility model, it should be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawing, or the orientation or position relationship commonly placed when the utility model product is used, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0061] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0062] In the utility model, unless another definite provision and limitation, first feature is above or below second feature can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through additional feature between them.

[0063] Although the description of the utility model is combined with above specific embodiment, it is obvious that many substitutions, modifications and changes can be made according to the above-mentioned content by the person skilled in the art. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. An explosion relief valve, characterized in that The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

2. The explosion relief valve of claim 1, wherein The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

3. The explosion relief valve of claim 2, wherein, The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

4. The explosion relief valve of claim 3, wherein The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

5. The explosion relief valve of claim 2, wherein, The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

6. The explosion relief valve of claim 1, wherein, The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

7. The explosion relief valve of claim 1, wherein The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

8. The explosion relief valve of claim 1, wherein, The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1).

9. The explosion relief valve of claim 1, wherein, The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable membrane (23) and the gap (22) between valve cover (21) and valve body (1). The utility model relates to a valve body (1) is provided with waterproof and breathable structure (2) and pressure relief valve cover (3), waterproof and breathable structure (2) is arranged in the inner chamber (11) of valve body (1), and the inner chamber (11) is connected with the outside environment through waterproof and breathable 10. The explosion relief valve of claim 9, wherein, The rotating shaft (213) is eccentrically arranged on the side close to the waterproof and breathable membrane (23).

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