A shell-type explosion-proof vent valve

Abstract

This utility model discloses a clamshell-type explosion-proof ventilated valve, including a valve body, a valve cover, a breathable membrane, a valve cover protective cover, and an elastic rotating assembly. The valve body has a mounting cavity and a pressure relief channel. The side end of the valve cover is set in the mounting cavity through the elastic rotating assembly and covers the pressure relief channel. The elastic rotating assembly can drive the valve cover to rotate relative to the valve body under the action of external force to open the pressure relief channel. It can also drive the valve cover to reset based on its own elastic restoring force. A gas passage is formed on the valve cover. The valve cover protective cover is set on the valve cover, and a breathable gap is formed between the valve cover protective cover and the valve cover. The breathable membrane is set between the valve cover protective cover and the valve cover, and cooperates with the gas passage, the breathable gap, and the pressure relief channel to form a breathing channel. The valve cover is opened by rotation, merging the pressure relief channel and the breathing channel, making the valve body structure compact and fully opening the pressure relief channel to expand the pressure relief flow area, thereby achieving rapid pressure relief and ensuring the stability and reliability of the valve body.

Description

Technical Field

[0001] This utility model relates to the field of vent valve technology, specifically to a clamshell-type explosion-proof vent valve. Background Technology

[0002] Battery packs provide energy for new energy products such as pure electric vehicles and hybrid vehicles. During the charging and discharging process, some chemical energy is converted into heat energy, which causes the temperature and pressure inside the pack to rise. In the event of a malfunction, spontaneous combustion due to a collision, or high-rate charging and discharging, the temperature and pressure inside the pack may increase instantaneously. It is necessary to release the pressure of the pack in time through an explosion-proof vent valve to prevent further and more serious situations from occurring.

[0003] like Figure 1 As shown, existing explosion-proof vent valves typically use a spring to elastically engage with the valve core and valve cover to isolate the breathing passage 1' from the exhaust passage 2'. The breathing passage 1' balances the internal and external pressures, while the exhaust passage 2' enables pressure relief and explosion when the pressure difference is large.

[0004] However, existing explosion-proof vent valves have a large valve core length and high space occupancy rate, making it difficult to meet the "every inch counts" assembly requirements inside the battery pack and limiting the compact design of the entire pack structure. At the same time, the pressure relief efficiency is low, and the response capability is limited when facing sudden high temperature and high pressure gas impact. In addition, after experiencing high temperature, high pressure gas flow and burning, its key components such as sealing rings, springs and valve core skeletons are prone to deformation or performance degradation, and cannot be restored to the factory design standard, resulting in the valve body being reused, which has low reliability.

[0005] Therefore, providing a compact, fast-release, stable and reliable explosion-proof vent valve has become an urgent problem to be solved in this field. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a compact, stable and reliable shell-type explosion-proof vent valve.

[0007] To achieve the above objectives, the clamshell-type explosion-proof ventilated valve provided by this utility model includes a valve body, a valve cover, and a breathable membrane, as well as a valve cover protective cover and an elastic rotating assembly.

[0008] The valve body has a mounting cavity and a pressure relief channel inside. The valve cover is disposed in the mounting cavity via an elastic rotating assembly, covering the pressure relief channel. The elastic rotating assembly can drive the valve cover to rotate relative to the valve body under the action of external force, so that the mounting cavity and the pressure relief channel cooperate to form a pressure relief channel. It can also drive the valve cover to reset based on its own elastic restoring force.

[0009] A gas passage is formed on the valve cover, a valve cover protective cover is disposed on the valve cover, and a breathable gap is formed between the valve cover protective cover and the valve cover. A breathable membrane is disposed between the valve cover protective cover and the valve cover, and cooperates with the gas passage, the breathable gap and the pressure relief channel to form a breathing channel.

[0010] Furthermore, the mounting cavity and the pressure relief channel are configured in a T-shape, and the bottom of the mounting cavity is provided with a sealing groove to accommodate the inner sealing ring of the valve body, and the inner sealing ring of the valve body abuts against the valve cover.

[0011] Furthermore, the bottom of the valve body is provided with an outer sealing ring.

[0012] Furthermore, the valve cover side end is provided with a connector for cooperating with the elastic rotating assembly. The elastic rotating assembly includes a rotating shaft, a torsion spring and a cover plate. The cover plate is disposed on the inner wall of the mounting cavity. The rotating shaft passes through the connector and is slidably connected to the cover plate at both ends. The torsion spring is sleeved on both ends of the rotating shaft and elastically connected to the cover plate.

[0013] Furthermore, elastic arms are formed in opposite directions at both ends of the rotating shaft.

[0014] Furthermore, the valve cover is provided with an inner iron lining.

[0015] Furthermore, the gas through-hole is located in the middle region of the valve cover and communicates with the pressure relief channel, and the vent gap is located on the top of the valve cover and distributed around the gas through-hole.

[0016] Furthermore, a support ring is provided around the gas through-hole to cooperate with the breathable membrane.

[0017] The clamshell-type explosion-proof vent valve provided by this utility model has a valve cover connected to the valve body via an elastic rotating component. The valve cover is opened by rotation, and the pressure relief channel and the breathing channel are combined. This effectively shortens the valve body height and reduces the space occupied by the valve body, making the valve body structure compact. On this basis, the elastic rotating component can open the valve cover under the action of external force of high pressure difference, fully opening the pressure relief channel to expand the pressure relief flow area, thereby achieving rapid pressure relief, effectively preventing explosion, and ensuring the stability and reliability of the valve body. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of an explosion-proof vent valve in the prior art;

[0020] Figure 2A schematic diagram of the open state of the shell-type square explosion vent valve provided by this utility model;

[0021] Figure 3 A schematic diagram of the closed state of the shell-type square explosion vent valve provided by this utility model;

[0022] Figure 4 An exploded view of the shell-type square explosion vent valve provided by this utility model;

[0023] Figure 5 This is a cross-sectional view of the open state of the shell-type square explosion vent valve in this utility model.

[0024] Figure 6 and Figure 7 This is a cross-sectional schematic diagram of the closed state of the shell-type square explosion vent valve in this utility model;

[0025] Figure 8 This is a schematic diagram of the valve body in this utility model;

[0026] Figure 9 This is a schematic diagram of the valve cover structure in this utility model;

[0027] Figure 10 This is a schematic diagram of the venting channel in the utility model.

[0028] Figure 11 and Figure 12 This is a schematic diagram of the breathing channel in this utility model.

[0029] Figure label:

[0030] 1. Valve body; 11. Housing cavity; 111. Groove; 12. Pressure relief channel; 13. Sealing groove; 14. Inner density ring of valve body; 15. Outer density ring of valve body;

[0031] 2. Valve cover; 21. Gas vent; 22. Vent gap; 23. Connector; 24. Support ring; 25. Breathing channel; 26. Inner lining iron piece;

[0032] 3. Breathable membrane;

[0033] 4. Valve cover protective cover;

[0034] 5. Elastic rotating assembly; 51. Rotating shaft; 511. Elastic arm; 52. Torsion spring; 53. Cover plate; 531. Rotating shaft groove; 532. Energy storage arm. Detailed Implementation

[0035] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0036] See Figures 2 to 6 The illustration shows an example of a shell-type explosion-proof vent valve provided by this utility model.

[0037] As shown in the figure, the shell-type explosion-proof ventilator in this example mainly includes a valve body 1, a valve cover 2, a breathable membrane 3, a valve cover protective cover 4, and an elastic rotating assembly 5.

[0038] The valve body 1 has a housing cavity 11 and a pressure relief channel 12 inside. The valve cover 2 is set in the housing cavity 11 by an elastic rotating component 5 and covers the pressure relief channel 12. The elastic rotating component 5 can drive the valve cover 2 to rotate relative to the valve body 1 under the action of external force, so as to fully open the pressure relief channel 12, expand the pressure relief flow area, thereby achieving rapid pressure relief and effectively preventing explosion. The elastic rotating component 5 can also drive the valve cover 2 to reset based on its own elastic restoring force to ensure the stability and reliability of the valve body.

[0039] Furthermore, a gas passage 21 is formed on the valve cover 2, and a valve cover protective cover 4 is disposed on the valve cover 2. A ventilated gap 22 is formed between the valve cover protective cover 4 and the valve cover 2. A breathing ventilated membrane 3 is disposed between the valve cover protective cover 4 and the valve cover 2. It cooperates with the gas passage 21, the ventilated gap 22 and the pressure relief channel 12 to form a breathing channel 25. This combines the pressure relief channel 12 and the breathing channel 25, which can effectively shorten the height of the valve body and reduce the space occupation rate of the valve body, making the valve body structure compact. On this basis, the elastic rotating component can open the valve cover under the action of the external force of the high pressure difference, fully open the pressure relief channel, expand the pressure relief flow area, thereby achieving rapid pressure relief, effectively preventing explosion, and ensuring the stability and reliability of the valve body.

[0040] Combination Figures 4 to 7 The valve body 1 is mounted on the battery pack. The mounting cavity 11 inside the valve body 1 is connected to the pressure relief channel 12. The mounting cavity 11 is connected to the atmosphere outside the valve body 1, and the pressure relief channel 12 is connected to the battery pack inside the valve body 1. The diameter of the mounting cavity 11 is larger than the diameter of the pressure relief channel 12, so that the mounting cavity 11 and the pressure relief channel 12 are configured in a T-shape. This allows the valve cover 2 to be mounted in the mounting cavity 11 and cover the pressure relief channel 12, thereby separating the inside and outside of the battery pack.

[0041] Combination Figure 8 Furthermore, a sealing groove 13 is provided at the top of the mounting cavity 11. The sealing groove 13 is distributed around the port of the pressure relief channel 12, and a valve body inner sealing ring 14 is placed in the sealing groove 13 so that when the valve cover 2 is placed in the mounting cavity 11, it can abut against the valve body inner sealing ring 14, thereby effectively sealing the fitting gap between the valve cover 2 and the valve body 1, preventing gas inside the battery pack from leaking from the fitting gap between the valve cover 2 and the valve body 1, and ensuring the stability and reliability of the valve body.

[0042] Correspondingly, the bottom of the valve body 1 is provided with an outer sealing ring 15. The outer sealing ring 15 is distributed around the port of the pressure relief channel 12 to effectively seal the mating gap between the valve body 1 and the battery pack, preventing gas inside the battery pack from leaking from the mating gap between the valve body 1 and the battery pack.

[0043] Combination Figures 4 to 7 In conjunction with this, the valve cover 2 is connected to the valve body 1 via the elastic rotating component 5, so that the valve cover 2 can be stably set in the mounting cavity 11, covering the pressure relief channel 12, so as to effectively isolate the inside and outside of the battery pack. When the pressure difference between the inside and outside of the battery pack is large, the valve cover 2 can be quickly rotated relative to the valve body 1 to open the valve cover 2, connect the inside and outside of the battery pack, expand the pressure relief flow area, realize rapid pressure relief, and effectively prevent explosion caused by untimely pressure relief.

[0044] Combination Figure 8 and Figure 9 Specifically, the valve cover 2 has a connector 23 on its side end for cooperating with the elastic rotating component 5. Correspondingly, the mounting cavity 11 has a groove 111 on its side end that can accommodate the elastic rotating component 5 and the connector 23, so that the elastic rotating component 5 and the connector 23 can be stably fitted in the groove 111, separating the elastic rotating component 5 and the connector 23 from the pressure relief channel 12 and the inside of the battery pack. This does not affect the effective sealing between the valve cover 2 and the sealing ring 14 inside the valve body, and at the same time reduces the burning of the elastic rotating component 5 and the connector 23 by the high temperature and high pressure gas flow inside the battery pack, so as to ensure the stable performance of the elastic rotating component 5 and the connector 23, improve the reliable connection between the valve cover 2 and the valve body 1, and ensure the stability and reliability of the valve body.

[0045] Combination Figure 4 and Figure 7 Furthermore, the connector 23 has a through hole inside. The elastic rotating assembly 5 includes a rotating shaft 51, a torsion spring 52 and a cover plate 53. The cover plate 54 is respectively disposed on the inner walls of both sides of the groove 111 and corresponds to the two ends of the connector 23. The rotating shaft 51 passes through the through hole of the connector 23 and extends out to slide and connect with the cover plate 53 at both ends of the connector 23.

[0046] In addition, the two ends of the connecting member 23 of the rotating shaft 52 are respectively formed with two sets of relatively distributed elastic arms 511. The cover plate 53 is also provided with a rotating shaft groove 531 adapted to the elastic arms 511. The end of the rotating shaft groove 531 is provided with a power storage arm 532 so that the elastic arms 511 at both ends of the rotating shaft 52 can be accommodated in the rotating shaft groove 531 and can rotate in the rotating shaft groove 531. At the same time, torsion springs 52 are respectively sleeved on the elastic arms 511 at both ends of the rotating shaft 52, and the end of the torsion spring 52 is connected to the power storage arm 532.

[0047] In this way, the rotating shaft 51, torsion spring 52 and cover plate 53 cooperate with each other to stably slide the connecting piece 23 in the groove 111, and simultaneously stably place the valve cover 2 in the mounting cavity 11.

[0048] In the initial state, the torsion spring 52 is in a pre-tightened state, which can apply a pre-tightening force to the elastic arm 511 of the rotating shaft 52 and the cover plate 53, so that the rotating shaft 52 can stably place the valve cover 2 in the mounting cavity 11 through the connector 23, ensuring the contact between the valve cover 2 and the sealing ring 14 inside the valve body, thereby effectively sealing the gap between the valve cover 2 and the valve body 1, and separating the inside and outside of the battery pack.

[0049] Combination Figure 2 , Figure 5 and Figure 10 When a large pressure difference is generated inside and outside the battery pack, the gas inside the battery pack will exert a thrust on the valve cover 2 towards the outside of the battery pack. When the thrust is greater than the preload of the torsion spring 52, the valve cover 2 will move towards the outside of the battery pack under the action of the thrust.

[0050] At the same time, the valve cover 2 will drive the rotating shaft 52 and the torsion spring 52 to rotate synchronously in the rotating shaft groove 531 facing the outside of the battery pack, so that the valve cover 2 rotates relative to the valve body 1 to open the valve cover 2 and fully open the pressure relief channel 12. The pressure relief channel 12 connects the inside and outside of the battery pack, so that the gas inside the battery pack is quickly ejected along the pressure relief channel 12 to achieve rapid pressure relief.

[0051] When the rotating shaft 52 and the torsion spring 52 rotate synchronously around the rotating shaft groove 531, the contact force between the end of the torsion spring 52 and the energy storage arm 532 increases, causing the torsion spring 52 to undergo elastic deformation. At the same time, the elastic arm 521 of the rotating shaft 52 rotates synchronously, which will further wrap around the torsion spring 52, forcing the torsion spring 52 to undergo greater deformation, thereby storing energy.

[0052] like Figure 5 and Figure 10 As shown, based on the elastic force of the torsion spring 52, when the valve cover 2 rotates relative to the valve body 1 and opens the pressure relief channel 12, the valve cover 2 and the valve body 1 are distributed at an angle, so that the high pressure gas inside the battery pack is discharged along the pressure relief channel 12 and changes the injection angle through the inner surface of the valve cover 2, which can protect the electrical connectors around the battery pack to a certain extent.

[0053] When the high-pressure gas inside the battery pack is released, the thrust exerted by the gas inside the battery pack on the valve cover 2 gradually decreases. Based on its own elastic restoring force, the torsion spring 52 will gradually release the stored energy to drive the elastic arm 521 and the rotating shaft 52 to gradually rotate towards the inside of the battery pack until the battery pack reaches the balance of the internal and external pressure difference. At this point, the battery pack no longer exerts a thrust on the valve cover 2. The energy released by the torsion spring 52 will drive the elastic arm 521 and the rotating shaft 52 to rotate towards the inside of the battery pack, thereby causing the valve cover 2 to reset and be placed back in the placement cavity 11, covering and closing the pressure relief channel 12 to prevent foreign objects from entering the battery pack.

[0054] The elastic rotating component 5 thus formed cooperates with the valve cover 2 and the valve body 1 to ensure effective sealing between the valve cover 2 and the valve body 1 when the pressure difference between the inside and outside of the battery pack is balanced. It can also quickly open the valve cover 2 and the pressure relief channel 12 when the pressure difference between the inside and outside of the battery pack is large, so as to achieve rapid pressure relief. During the pressure relief process, it protects the electrical connectors around the battery pack from being burned by high temperature and high pressure gas. At the same time, after the pressure relief is completed, the valve cover 2 is closed in time to re-isolate the inside and outside of the battery pack.

[0055] Compared to existing explosion-proof vent valves that require a certain height space for the valve cover to move axially and open the venting channel, this solution uses the elastic rotating component 5 to drive the valve cover 2 to rotate to achieve opening and resetting. It can quickly open and close the pressure relief channel 12 and effectively shorten the height of the valve body, making the valve body structure compact and reducing the space occupied by the battery pack.

[0056] Furthermore, compared to the existing venting channels of explosion-proof venting valves, this solution can fully open the valve cover 2, effectively expanding the pressure relief flow area, achieving rapid pressure relief, effectively preventing explosions caused by untimely pressure relief, and improving the reliability of the valve body.

[0057] In addition, when there is a pressure difference between the inside and outside of the battery pack, but the pressure difference is small and insufficient to push the valve cover 2 to open the pressure relief channel 12, the gas inside and outside the battery pack needs to breathe in order to maintain the balance of the internal and external pressure difference. In order to realize the breathing of the gas inside and outside the battery pack, the top of the valve cover 2 is also provided with a breathable membrane 3 and a valve cover protective cover 4. The breathable membrane 3 and the valve cover protective cover 4 can cooperate with the valve cover 2 to realize the breathing of gas when the internal and external pressure difference of the battery pack is small, and ensure the balance of the internal and external pressure difference of the battery pack.

[0058] Combination Figure 9 Specifically, the valve cover 2 has a gas through hole 21 and a vent gap 22. The gas through hole 21 is located in the middle area of ​​the valve cover 2 and is connected to the pressure relief channel 12. The vent gap 22 is located on the top of the valve cover 2 and is distributed around the gas through hole 21 in the outer area of ​​the valve cover 2, so that when the valve cover protective cover 4 is located on the top of the valve cover 2, the gas between the valve cover protective cover 4 and the valve cover 2 can be discharged from the mating gap between the valve cover protective cover 4 and the valve cover 2 along the vent gap 22.

[0059] Combination Figure 5 and Figure 7 Furthermore, a support ring 24 is provided around the gas through hole 21 to cooperate with the breathing membrane 3, so that the breathing membrane 3 is placed between the valve cover protection cover 4 and the valve cover 2, and is placed on the support ring 24.

[0060] Here, the breathable membrane 3 is a conventional technical means in this field. As an example, the breathable membrane 3 can be made of existing e-PTFE breathable membrane.

[0061] like Figure 11 and Figure 12 As shown, the pressure relief channel 12, gas vent 21, breathable membrane 3, and breathable gap 22 work together to form a breathing channel 25. When there is a small pressure difference between the inside and outside of the battery pack, the gas inside the battery pack can enter the gas vent 21 along the pressure relief channel 12, then pass through the breathable membrane 3 into the space between the valve cover protection cover 4 and the valve cover 2, and move towards the outside of the breathable membrane 3. It is then discharged from the gap between the valve cover protection cover 4 and the valve cover 2 along the breathable gap 22, so as to realize the breathing of the battery pack and maintain the pressure difference balance between the inside and outside of the battery pack.

[0062] Correspondingly, gas outside the battery pack can also enter the battery pack through the breathing channel 25, which will not be elaborated here.

[0063] The breathing channel 25 and the pressure relief channel 12 are thus combined into a unified channel. Compared with the existing explosion-proof vent valves that separate the breathing channel and the pressure relief channel, this solution can effectively reduce the space occupied by opening the channel and further improve the structural compactness of the valve body.

[0064] Furthermore, the valve cover 2 is also provided with an inner iron lining 26, which can be made of easily magnetic metal. When the battery pack is tested offline, it can be attracted by the magnetic fixture, thereby achieving the purpose of opening the valve cover 2 for rapid testing.

[0065] The following example illustrates the working process of this utility model in a specific application. It should be noted that the content described here is only a specific application example of this solution and does not constitute a limitation on this solution.

[0066] like Figure 3 , Figure 6 and Figure 7As shown, if there is a small pressure difference between the inside and outside of the battery pack, the gas inside the battery pack can communicate with the outside through the breathing channel 25. The gas inside the battery pack enters the gas vent 21 along the pressure relief channel 12, then passes through the breathing membrane 3 into the space between the valve cover protective cover 4 and the valve cover 2, and moves towards the outside of the breathing membrane 3. It is then discharged through the mating gap between the valve cover protective cover 4 and the valve cover 2 along the ventilation gap 22, thereby realizing the breathing of the battery pack and maintaining the pressure difference balance between the inside and outside of the battery pack. Figure 11 and Figure 12 As shown.

[0067] like Figure 2 and Figure 4 As shown, if a large pressure difference occurs between the inside and outside of the battery pack, the gas inside the battery pack will exert a thrust on the valve cover 2 towards the outside of the battery pack. When the thrust is greater than the preload of the torsion spring 52, the valve cover 2 drives the rotating shaft 52 and the torsion spring 52 to rotate synchronously in the rotating shaft groove 531 towards the outside of the battery pack. This causes the valve cover 2 to rotate relative to the valve body 1, opening the valve cover 2 and fully opening the pressure relief channel 12, expanding the pressure relief flow area, and causing the gas inside the battery pack to be rapidly ejected along the pressure relief channel 12 to achieve rapid pressure relief. Figure 10 As shown.

[0068] Furthermore, based on the elastic force of the torsion spring 52, when the valve cover 2 rotates relative to the valve body 1 and opens the pressure relief channel 12, the valve cover 2 and the valve body 1 are distributed at an angle, so that the high pressure gas inside the battery pack is discharged along the pressure relief channel 12 and changes the injection angle through the inner surface of the valve cover 2, which can protect the electrical connectors around the battery pack to a certain extent.

[0069] Meanwhile, when the high-pressure gas inside the battery pack is released, the thrust exerted by the gas inside the battery pack on the valve cover 2 gradually decreases. Based on its own elastic restoring force, the torsion spring 52 gradually releases the stored energy to drive the elastic arm 521 and the rotating shaft 52 to rotate towards the inside of the battery pack. When the battery pack reaches the balance of the internal and external pressure difference, the battery pack no longer exerts a thrust on the valve cover 2. The energy released by the torsion spring 52 will drive the elastic arm 521 and the rotating shaft 52 to rotate towards the inside of the battery pack, thereby driving the valve cover 2 to reset and reposition the valve cover 2 in the placement cavity 11, covering and closing the pressure relief channel 12 to prevent foreign objects from entering the battery pack.

[0070] The clamshell-type explosion-proof vent valve provided by this utility model has a valve cover 2 connected to the valve body 1 via an elastic rotating component 6 at one end. The valve cover 1 is opened by rotation, and the pressure relief channel 12 and the breathing channel 25 are combined. This can effectively shorten the height of the valve body and reduce the space occupied by the valve body, making the valve body structure compact. On this basis, the elastic rotating component 5 can open the valve cover under the action of external force of high pressure difference, and fully open the pressure relief channel 12 to expand the pressure relief flow area, thereby achieving rapid pressure relief, effectively preventing explosion, and ensuring the stability and reliability of the valve body.

[0071] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A clamshell-type explosion-proof breathable valve, comprising a valve body, a valve cover, and a breathable membrane, characterized in that, It also includes a valve cover protective cover and a flexible rotating assembly. The valve body has a mounting cavity and a pressure relief channel inside. The valve cover is disposed in the mounting cavity via an elastic rotating assembly, covering the pressure relief channel. The elastic rotating assembly can rotate the valve cover relative to the valve body under external force to open the pressure relief channel, and can also reset the valve cover based on its own elastic restoring force. A gas passage is formed on the valve cover, a valve cover protective cover is disposed on the valve cover, and a breathable gap is formed between the valve cover protective cover and the valve cover. A breathable membrane is disposed between the valve cover protective cover and the valve cover, and cooperates with the gas passage, the breathable gap and the pressure relief channel to form a breathing channel.

2. The clamshell-type explosion-proof vent valve according to claim 1, characterized in that, The mounting cavity and the pressure relief channel are configured in a T-shape. The bottom of the mounting cavity is provided with a sealing groove to accommodate the inner sealing ring of the valve body. The inner sealing ring of the valve body abuts against the valve cover.

3. The clamshell-type explosion-proof vent valve according to claim 1, characterized in that, The valve body is provided with an outer sealing ring at the bottom.

4. The clamshell-type explosion-proof vent valve according to claim 1, characterized in that, The valve cover is provided with a connector for cooperating with the elastic rotating assembly. The elastic rotating assembly includes a rotating shaft, a torsion spring and a cover plate. The cover plate is disposed on the inner wall of the mounting cavity. The rotating shaft passes through the connector and is slidably connected to the cover plate at both ends. The torsion spring is sleeved on both ends of the rotating shaft and is elastically connected to the cover plate.

5. The clamshell-type explosion-proof vent valve according to claim 4, characterized in that, The two ends of the shaft are respectively formed with relatively distributed elastic arms.

6. The clamshell-type explosion-proof vent valve according to claim 1, characterized in that, The valve cover has an inner iron lining.

7. The clamshell-type explosion-proof vent valve according to claim 1, characterized in that, The gas through hole is located in the middle area of ​​the valve cover and communicates with the pressure relief channel. The vent gap is located on the top of the valve cover and is distributed around the gas through hole.

8. The clamshell-type explosion-proof vent valve according to claim 7, characterized in that, The gas passage is surrounded by a support ring for engaging with the breathable membrane.

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