Explosion-proof valve and box body

Abstract

The utility model discloses an anti-explosion valve and a box body, and relates to the technical field of anti-explosion valves. The anti-explosion valve is arranged on the box body and comprises a valve body, a gland and a breathing mechanism. Wherein the valve body is provided with a breathing channel. The gland is slidably connected to the valve body, and a gap is formed between the gland and the valve body. The breathing mechanism is movably connected to the gland, and a breathing switch is formed between the breathing mechanism and the valve body. When the breathing mechanism abuts against the valve body, the breathing switch is turned on, and the interior of the box body communicates with the outside. When the breathing mechanism is separated from the valve body, the breathing switch is closed, and the interior of the box is not communicated with the outside.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of explosion-proof valves, in particular to an explosion-proof valve and a box body. BACKGROUND

[0002] With the development of electric vehicles, batteries or battery modules are also used more and more frequently. In order to ensure the safe use of batteries or battery modules, the batteries or battery modules are generally arranged in a battery box.

[0003] In use, the battery box may be in some low-pressure environment, which may cause the battery box to deform. In order to prevent the battery box from deforming, an explosion-proof valve is generally arranged on the battery box. In the related art, an automatic switch is arranged on the explosion-proof valve to adjust the pressure difference between the inside and outside of the box body. However, in some environments with high humidity, a large amount of water vapor may enter the battery box through the explosion-proof valve, affecting the batteries or battery modules in the battery box. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide an explosion-proof valve and a switch. By arranging a breathing mechanism on the explosion-proof valve, it can be determined whether to open the breathing switch according to the external environment, so as to avoid water vapor entering the box body through the explosion-proof valve in the case of high humidity.

[0005] In a first aspect, the present application provides an explosion-proof valve arranged on a box body. The explosion-proof valve comprises a valve body, a gland and a breathing mechanism. The valve body is provided with a breathing channel. The gland is slidingly connected to the valve body and has a gap with the valve body. The breathing mechanism is movably connected to the gland and forms a breathing switch with the valve body.

[0006] When the breathing mechanism abuts against the valve body, the breathing switch is opened, and the inside of the box body is in communication with the outside. When the breathing mechanism is separated from the valve body, the breathing switch is closed, and the inside of the box body is not in communication with the outside.

[0007] In a possible design manner of the first aspect, a first sealing gasket is further arranged between the breathing mechanism and the valve body. When the breathing mechanism abuts against the valve body, the breathing mechanism is connected to the valve body through the first sealing gasket.

[0008] In a possible design manner of the first aspect, the valve body is provided with a first annular groove, and the first sealing gasket is arranged in the first annular groove.

[0009] In a possible design manner of the first aspect, the breathing mechanism comprises a switch piece and a first spring. The switch piece is slidingly connected to the gland, one end of the first spring abuts against the gland, and the other end of the first spring abuts against the switch piece.

[0010] When the breathing switch is closed, the first spring is in a first compressed state, and the switch piece abuts against the valve body.

[0011] When the breathing switch is opened, the first spring is compressed from the first compressed state to the second compressed state, and the switch part is separated from the valve body.

[0012] In a possible design of the first aspect, the switch part comprises a breathing disc, a connecting rod, and a switch cover, the breathing disc is fixedly connected to one end of the connecting rod, and the switch cover is fixedly connected to the other end of the connecting rod.

[0013] The connecting rod is in sliding connection with the gland, the breathing disc is located on the side of the gland close to the valve body, and the switch cover is located on the side of the gland away from the valve body. One end of the first spring is in abutment against the gland, and the other end of the first spring is in abutment against the breathing disc.

[0014] In a possible design of the first aspect, the gland is provided with a first through hole and a second through hole, and the switch cover is provided with a protrusion. The connecting rod is in sliding connection within the first through hole, and the size of the protrusion is matched with the size of the second through hole.

[0015] When the breathing switch is closed, the protrusion is located within the second through hole. When the breathing switch is opened, the protrusion is located on the surface of the side of the gland away from the valve body.

[0016] In a possible design of the first aspect, the valve body comprises a body and a fixed support, the body is provided with a boss and a breathable hole, the fixed support is in sliding connection with the body and is in abutment against the boss through a second sealing gasket. The breathing disc is in abutment against the fixed support through a first sealing gasket, and the fixed support is provided with a first breathing channel.

[0017] In a possible design of the first aspect, the valve body further comprises a protective sleeve, a guide shaft, and a second spring, the guide shaft is provided with a second breathing channel, the protective sleeve is provided with a third breathing channel, and the breathing channels comprise the first breathing channel, the second breathing channel, and the third breathing channel. The protective sleeve is fixedly connected to the body, the guide shaft is in sliding connection with the body and is located within the protective sleeve, and the fixed support is fixedly connected to the guide shaft.

[0018] One end of the second spring is in abutment against the body, and the other end of the second spring is connected to the end of the guide shaft away from the body.

[0019] In a possible design of the first aspect, the protective sleeve is provided with a guide column, and the third breathing channel is arranged within the guide column.

[0020] The guide column is in sliding connection with the second breathing channel.

[0021] In a possible design of the first aspect, the end of the guide shaft away from the body is provided with a support body, one end of the second spring is in abutment against the body, and the other end of the second spring is in abutment against the support body.

[0022] In a possible design of the first aspect, the filter membrane is pressed against the fixed support by the pressing block, and the filter membrane is located at one end of the first breathing channel.

[0023] In a possible design of the first aspect, the boss is provided with a second annular groove, and the second sealing gasket is arranged in the second annular groove.

[0024] In a possible design of the first aspect, the body is provided with a third annular groove on the side away from the gland, and the third annular groove is provided with a third sealing gasket.

[0025] In a second aspect, the application provides a box body, which comprises a box body and the explosion-proof valve of the first aspect or any possible design thereof.

[0026] It can be understood that the box body provided in the second aspect has the beneficial effects of the explosion-proof valve of the first aspect or any possible design thereof, which will not be described here again.

[0027] The application has the following beneficial effects:

[0028] In the application, the breathing mechanism is arranged, the connection relationship between the breathing mechanism and the valve body can be manually adjusted, and whether the breathing switch is turned on or not can be selected according to the external environment, so that water vapor is prevented from entering the box body through the explosion-proof valve in the case that the humidity is relatively high. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0030] Figure 1 A top structure schematic diagram of an explosion-proof valve provided in the embodiments of the application;

[0031] Figure 2 A bottom structure schematic diagram of an explosion-proof valve provided in the embodiments of the application;

[0032] Figure 3 An explosion diagram of an explosion-proof valve provided in the embodiments of the application;

[0033] Figure 4 A sectional view of an explosion-proof valve provided in the application.

[0034] In the drawings:

[0035] 110 - valve body; 120 - gland; 130 - breathing mechanism; 140 - breathing switch; 150 - breathing passage; 160 - protective sleeve; 170 - guide shaft; 180 - second spring; 190 - filter membrane; 191 - pressing block;

[0036] 111 - body; 112 - fixing support;

[0037] 121 - first through hole; 122 - second through hole;

[0038] 131 - switch piece; 132 - first spring;

[0039] 151 - first breathing passage; 152 - second breathing passage; 153 - third breathing passage;

[0040] 161 - guide post; 171 - support body;

[0041] 1111 - boss; 1112 - air permeable hole; 1311 - breathing disc; 1312 - connecting rod; 1313 - switch cover;

[0042] 13131 - protrusion;

[0043] 1121 - first annular groove; 1122 - first sealing gasket; 1113 - second annular groove; 1114 - second sealing gasket; 1115 - third annular groove; 1116 - third sealing gasket. DETAILED DESCRIPTION

[0044] The technical solutions in the present application will be described below with reference to the drawings.

[0045] In the embodiments of the present application, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any implementation described herein as "exemplary" or "for example" is not necessarily to be construed as preferred or advantageous over other implementations. The terms "exemplary" or "for example" are intended to be used as a tool to present concepts in a conceptual manner, and are not intended to be used as a tool to limit the scope of the present application.

[0046] In the embodiments of the present application, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0047] It should be understood that the terms used in the description of various described examples herein are for the purpose of describing particular examples and are not intended to be limiting. As used in the description of various described examples, the singular forms "a", "an" and "the" are intended to include plural forms as well, unless the context clearly indicates otherwise.

[0048] In this application, "at least one", "multiple", "plurality", or "a plurality" means one, two, or more. "At least one of the following" or similar phrases refers to any combination of the items, including the single item or any combination of the plural items. For example, at least one of a, b, or c can mean a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or plural.

[0049] It should also be understood that, in this application, unless specifically stated and limited otherwise, the term "connected" can be interpreted in either a direct connection manner or an indirect connection manner, and can also be understood as fixed connection, detachable connection, or integral, and can be direct connection or indirect connection through an intermediate medium.

[0050] It should also be understood that the terms "include", "includes", "including", "comprise", "comprises", and / or "comprising", when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0051] It should be understood that the "one embodiment", "another embodiment", "a possible design" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiments or implementations are included in at least one embodiment of the application. Therefore, "in one embodiment of the present application" or "in another embodiment of the present application", "a possible design" appearing throughout the specification does not necessarily mean the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0052] It should also be understood that the specific values mentioned in the embodiments of the present application are not limited to the specific dimensions of the specific features, and the related values may be for the convenience of understanding or the best theoretical value of a certain feature. In practice, the related dimensions can be a range around the value, for example, the range can be ±10% of the best theoretical value, or ±20% of the best theoretical value, and in practice, the corresponding technical effect can be achieved.

[0053] The vertical in the embodiments of the present application includes some cases similar to vertical, for example, the angle between lines, lines and surfaces, and surfaces and surfaces is 80° to 100°, which can also be understood as vertical, rather than strictly limiting the angle between the two to 90° to be vertical. Similarly, the parallel in the embodiments of the present application also includes some cases similar to parallel, that is, the angle between lines, lines and surfaces, and surfaces and surfaces is 0° to 10°, which can also be understood as parallel.

[0054] With the development of electric vehicles, the use scenarios of batteries or battery modules are also increasing. In order to ensure the safe use of batteries or battery modules, the batteries or battery modules are generally arranged in a box.

[0055] In use, the box may be in some low-pressure environment, which may cause the battery box to deform. In order to prevent the box from deforming, an explosion-proof valve is generally arranged on the box. In the related art, an automatic switch is arranged on the explosion-proof valve, which can adjust the pressure difference between the inside and outside of the box. However, in some environments with high humidity, a large amount of water vapor may enter the box, forming condensed water, and then affecting the batteries or battery modules in the box.

[0056] To solve the above problems, the embodiments of the present application provide an explosion-proof valve. Referring to Figure 1 , Figure 2 , Figure 3 , Figure 1 a top structure diagram of an explosion-proof valve provided by the embodiments of the present application, Figure 2 a bottom structure diagram of an explosion-proof valve provided by the embodiments of the present application, Figure 3 an explosion-proof valve provided by the embodiments of the present application.

[0057] The explosion-proof valve provided by the embodiments of the present application is arranged on the box, for example, the explosion-proof valve can be arranged on the cover plate of the box, or arranged on the side surface of the box. The embodiments of the present application do not limit the specific position of the explosion-proof valve arranged on the box.

[0058] As shown in Figures 1 to 3 , the explosion-proof valve provided by the embodiments of the present application includes a valve body 110, a gland 120, and a breathing mechanism 130. Wherein,

[0059] The valve body 110 is provided with a breathing passage 150, one end of the breathing passage 150 is communicated with the inside of the box, and the other end of the breathing passage 150 is communicated with the breathing mechanism 130. The gland 120 is connected to the valve body 110 and has a gap between the valve body 110. The breathing mechanism 130 is movably connected to the gland 120 and forms a breathing switch 140 between the valve body 110.

[0060] Specifically, when the breathing mechanism 130 abuts against the valve body 110, the breathing switch 140 is closed, and the inside of the housing is not connected to the outside. When the breathing mechanism 130 is separated from the valve body 110, the breathing switch 140 is opened, and the inside of the housing is connected to the outside. Specifically, the inside of the housing is connected to the outside through the breathing channel 150, the breathing switch 140, and the gap between the pressure cap 120 and the valve body 110.

[0061] In this embodiment, by setting a breathing mechanism 130, the connection between the breathing mechanism 130 and the valve body 110 can be manually adjusted, so as to select whether to turn on the breathing switch 140 according to the external environment, and prevent water vapor from entering the box through the explosion-proof valve when the humidity is high.

[0062] In one embodiment of this application, to achieve a better sealing effect, a first sealing gasket 1122 is further provided between the breathing mechanism 130 and the valve body 110. (See reference...) Figure 4 , Figure 4 A cross-sectional view of an explosion-proof valve provided in this application, wherein, Figure 4 yes Figure 1 The sectional view obtained after sectioning along the AA direction.

[0063] like Figure 4 As shown, a first sealing gasket 1122 is also provided between the breathing mechanism 130 and the valve body 110. When the breathing mechanism 130 abuts against the valve body 110, the breathing mechanism 130 is connected to the valve body 110 through the first sealing gasket 1122. That is, when the breathing switch 140 is closed, the first sealing gasket 1122 can achieve a good sealing effect, preventing external water vapor from entering the box through the breathing switch 140 formed between the breathing mechanism 130 and the valve body 110.

[0064] Specifically, for better installation of the first sealing gasket 1122. For example... Figure 4 As shown, a first annular groove 1121 is provided on the valve body 110, and a first sealing gasket 1122 is disposed within the first annular groove 1121. It should be noted that the thickness of the first sealing gasket 1122 is greater than the depth of the first annular groove 1121, that is, a portion of the first sealing gasket 1122 is outside the first annular groove 1121, and this portion of the first sealing gasket 1122 is used to contact the breathing mechanism 130.

[0065] Since the first sealing gasket 1122 is disposed within the first annular groove 1121, in this embodiment of the application, the first sealing gasket 1122 can be an annular sealing ring.

[0066] like Figure 4As shown, the first sealing groove is arranged on the fixed support 112 of the valve body 110. The specific structure of the valve body 110 will be described in detail in subsequent embodiments.

[0067] In an embodiment of the present application, as shown in Figure 3 and Figure 4 The breathing mechanism 130 includes a switch piece 131 and a first spring 132. The switch piece 131 is in sliding connection with the gland 120. One end of the first spring 132 abuts against the gland 120, and the other end of the first spring 132 abuts against the switch piece 131. The first spring 132 is in a first compressed state.

[0068] When the breathing switch 140 is closed, the first spring 132 is in the first compressed state. Since the first spring 132 is in a compressed state, the first spring 132 will generate a pushing force on the switch piece 131, and the switch piece 131 will abut against the first sealing gasket 1122 on the valve body 110. The sealing between the switch piece 131 and the valve body 110 is achieved.

[0069] When it is necessary to open the explosion-proof valve so that the inside of the box can be ventilated with the outside, the switch piece 131 can be pulled outward. At this time, the breathing switch 140 is in an open state. When the switch piece 131 is pulled, the switch piece 131 will further compress the first spring 132, and the first spring 132 will be compressed from the first compressed state to a second compressed state. At this time, the switch piece 131 is separated from the valve body 110. The inside of the box can be communicated with the outside through the breathing passage 150, the breathing switch 140, and the gap between the gland 120 and the valve body 110, so as to achieve the pressure balance between the inside and the outside of the box.

[0070] In an embodiment of the present application, as shown in Figure 3 and Figure 4 The switch piece 131 includes a breathing disc 1311, a connecting rod 1312, and a switch cover 1313. The breathing disc 1311 is fixedly connected to one end of the connecting rod 1312, and the switch cover 1313 is fixedly connected to the other end of the connecting rod 1312. The breathing disc 1311 can be integrally formed with the connecting rod 1312, and the switch cover 1313 can be fixedly connected to the connecting rod 1312 by screws.

[0071] The connecting rod 1312 is in sliding connection with the gland 120, so as to achieve the sliding connection between the switch piece 131 and the gland 120. The breathing disc 1311 is located on the side of the gland 120 close to the valve body 110, and the switch cover 1313 is located on the side of the gland 120 away from the valve body 110. One end of the first spring 132 abuts against the gland 120, and the other end of the first spring 132 abuts against the breathing disc 1311.

[0072] When the breathing switch 140 is closed, the breathing disc 1311 on the switch piece 131 abuts on the valve body 110 and is in contact with the first sealing gasket 1122 on the valve body 110. When the breathing switch 140 is opened, the breathing disc 1311 on the switch piece 131 is separated from the valve body 110, that is, a channel is formed between the breathing disc 1311 and the valve body 110, so that gas can enter the inside of the box through the channel.

[0073] The switch cover 1313 is arranged to facilitate pulling the switch piece 131. In the embodiment of the present application, the specific shape of the switch cover 1313 is not limited. For example, the switch cover 1313 can be arranged in a rectangular shape, a square shape, or a circular shape, or as a handle.

[0074] In an embodiment of the present application, the gland 120 is provided with a first through hole 121 and a second through hole 122, and the switch cover 1313 is provided with a protrusion 13131, the size of the protrusion 13131 being matched with the size of the second through hole 122. The connecting rod 1312 is slidingly connected in the first through hole 121, that is, the connecting rod 1312 is slidingly connected with the gland 120 through the first through hole 121.

[0075] When the breathing switch 140 is closed, the protrusion 13131 is located in the second through hole 122, and at this time the breathing disc 1311 abuts on the valve body 110. When the breathing switch 140 is opened, the switch cover 1313 can be pulled outward to pull the protrusion 13131 out of the second through hole 122. When it is needed to keep the breathing switch 140 in an opened state, the switch cover 1313 can be rotated to abut the protrusion 13131 on the surface of the gland 120 away from the valve body 110. At this time, the distance between the breathing disc 1311 and the valve body 110 is consistent with the height of the protrusion 13131 itself, thereby realizing opening and keeping the breathing switch 140 in an opened state.

[0076] At this time, since the second through hole 122 is not blocked by the protrusion 13131, the inside of the box can also be communicated with the outside through the breathing channel 150, the breathing switch 140 and the second through hole 122.

[0077] When it is needed to close the breathing switch 140 again, the switch cover 1313 can be rotated to make the protrusion 13131 in the second through hole 122, at this time the breathing disc 1311 abuts on the valve body 110, and the breathing switch 140 is closed.

[0078] It should be noted that a plurality of second through holes 122 can be arranged on the gland 120, and a corresponding number of protrusions 13131 can be arranged on the switch cover 1313, the positions of the protrusions 13131 on the switch cover 1313 corresponding to the positions of the second through holes 122 on the gland 120.

[0079] In an embodiment of the present application, the explosion-proof valve also needs to have a certain explosion-proof function because the battery or battery module in the box may explode, causing the pressure in the box to rise instantaneously.

[0080] As shown in Figure 2 , Figure 3 and Figure 4 , the valve body 110 includes a body 111 and a fixed bracket 112, the body 111 is provided with a boss 1111 and a gas permeable hole 1112, wherein the fixed bracket 112 is in sliding connection with the body 111 and abuts against the boss 1111 through a second sealing gasket 1114. The breathing disc 1311 in the switch piece 131 abuts against the fixed bracket 112 through a first sealing gasket 1122, and the fixed bracket 112 is provided with a first breathing channel 151.

[0081] When the pressure in the box rises instantaneously, the gas in the box can push the fixed bracket 112 away through the gas permeable hole 1112, so that the gas in the box can be discharged to the outside through the gap between the fixed bracket 112 and the body 111 and the gap between the gland 120 and the body 111 of the valve body 110, achieving the balance of the internal and external pressure difference of the box.

[0082] In an embodiment of the present application, the explosion-proof valve further comprises a filter membrane 190 and a pressing block 191, the filter membrane 190 is pressed on the fixed bracket 112 through the pressing block 191, and the filter membrane 190 is located at one end of the first breathing channel 151. Wherein, when the breathing switch 140 is opened, the filter membrane 190 can filter water vapor to prevent water vapor from the outside from entering the box,

[0083] In an embodiment of the present application, the explosion-proof valve further comprises a protective sleeve 160, a guide shaft 170 and a second spring 180, the guide shaft 170 is provided with a second breathing channel 152, and the protective sleeve 160 is provided with a third breathing channel 153. Wherein, the first breathing channel 151, the second breathing channel 152 and the third breathing channel 153 jointly form the breathing channel 150 in the embodiment of the present application.

[0084] Wherein, the protective sleeve 160 is fixedly connected to the body 111, the guide shaft 170 is in sliding connection with the body 111 and located in the protective sleeve 160, and the fixed bracket 112 is fixedly connected to the guide shaft 170. One end of the second spring 180 abuts against the body 111, and the other end of the second spring 180 is connected to the end of the guide shaft 170 away from the body 111.

[0085] When the pressure in the box instantaneously rises, the gas in the box can push the fixed support 112 away through the air hole 1112, since the fixed support 112 is fixedly connected with the guide shaft 170, thus the guide shaft 170 is driven to move, and the second spring 180 is compressed. When the gas in the box is discharged to the outside through the gap between the fixed support 112 and the body 111, and the gap between the grommet 120 and the body 111 of the valve body 110, the pressure in the box decreases, and the second spring 180 restores the deformation, and pulls the fixed support 112 back to the initial position through the guide shaft 170.

[0086] In an embodiment of the present application, in order to better connect the guide shaft 170 and the protective sleeve 160, the guide column 161 is arranged in the protective sleeve 160, and the third breathing channel 153 is arranged in the guide column 161. The guide column 161 is in sliding connection with the second breathing channel 152. The guide column 161 can limit the position of the guide shaft 170 in the protective sleeve 160, and does not affect the sliding of the guide shaft 170 in the protective sleeve 160. In addition, by arranging the third breathing channel 153 on the guide column 161, the communication between the third breathing channel 153 and the second breathing channel 152 can be realized, and the inside of the box can be communicated with the outside through the breathing channel 150.

[0087] In an embodiment of the present application, in order to better realize the connection between the second spring 180 and the guide shaft 170, the support body 171 is arranged at the end of the guide shaft 170 away from the body 111, one end of the second spring 180 abuts against the body 111, and the other end of the second spring 180 abuts against the support body 171.

[0088] In an embodiment of the present application, in order to better install the second sealing gasket 1114, the second annular groove 1113 is arranged on the boss 1111, and the second sealing gasket 1114 is arranged in the second annular groove 1113. It should be noted that the thickness of the second sealing gasket 1114 is greater than the depth of the second annular groove 1113, that is, part of the second sealing gasket 1114 is outside the second annular groove 1113, and this part of the second sealing gasket 1114 is used to contact the fixed support 112. Since the second sealing gasket 1114 is arranged in the second annular groove 1113, in the embodiment of the present application, the second sealing gasket 1114 can be an annular sealing ring.

[0089] In an embodiment of the present application, in order to better realize the sealing between the explosion-proof valve and the box, the third annular groove 1115 is arranged on the body 111 of the valve body 110 away from the grommet 120, and the third sealing gasket 1116 is arranged in the third annular groove 1115. The body 111 can be connected with the box through the third sealing gasket 1116, to realize good sealing between the body 111 and the box.

[0090] In the embodiments of the present application, a box is also provided, which comprises a box body and the explosion-proof valve according to any one of the preceding embodiments, wherein the explosion-proof valve is arranged on the box body.

[0091] The above merely provides the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

[0092] Each of the embodiments in the present specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0093] Although the preferred embodiments of the embodiments of the present application have been described, the person skilled in the art can make other changes and modifications to the embodiments once the basic creative concept is known. Therefore, the protection scope of the present application includes the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0094] The working principle and implementation manner of the explosion-proof valve and the box of the present application are described by applying specific examples in the present specification, and the above embodiment description is only used to help understand the specific settings and core idea of the present application; meanwhile, for the person skilled in the art, the specific implementation manner and application scope will be changed according to the idea of the present application, and the above description should not be understood as the limitation of the present application.

[0095] The above merely provides the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An explosion relief valve provided on a tank, characterized by, The valve body is provided with a breathing passage; The gland is connected to the valve body with a gap; The breathing mechanism is movably connected to the gland and forms a breathing switch with the valve body; When the breathing mechanism abuts against the valve body, the breathing switch is closed, and the inside of the box is not connected with the outside; When the breathing mechanism is separated from the valve body, the breathing switch is opened, and the inside of the box is connected with the outside; The breathing mechanism includes a switch piece and a first spring, the switch piece is slidably connected to the gland, one end of the first spring abuts against the gland, and the other end of the first spring abuts against the switch piece; When the breathing switch is closed, the first spring is in a first compressed state, and the switch piece abuts against the valve body; When the breathing switch is opened, the first spring is compressed from the first compressed state to a second compressed state, and the switch piece is separated from the valve body.

2. The explosion-proof valve according to claim 1, wherein a first sealing gasket is further arranged between the breathing mechanism and the valve body, and when the breathing mechanism abuts against the valve body, the breathing mechanism is connected to the valve body through the first sealing gasket.

3. The explosion-proof valve according to claim 2, wherein a first annular groove is arranged on the valve body, and the first sealing gasket is arranged in the first annular groove.

4. The explosion-proof valve according to claim 2 or 3, wherein the switch piece comprises a breathing disc, a connecting rod and a switch cover, the breathing disc is fixedly connected to one end of the connecting rod, and the switch cover is fixedly connected to the other end of the connecting rod; The connecting rod is slidably connected to the gland, the breathing disc is located on the side of the gland close to the valve body, and the switch cover is located on the side of the gland away from the valve body; One end of the first spring abuts against the gland, and the other end of the first spring abuts against the breathing disc.

5. The explosion-proof valve according to claim 4, wherein a first through hole and a second through hole are arranged on the gland; A protrusion is arranged on the switch cover; The connecting rod is slidably connected in the first through hole, and the size of the protrusion is matched with the size of the second through hole; When the breathing switch is closed, the protrusion is located in the second through hole; When the breathing switch is opened, the protrusion is located on the surface of the side of the gland away from the valve body.

6. The explosion-proof valve according to claim 5, wherein the valve body comprises a body and a fixed support, a boss and a breathable hole are arranged on the body, the fixed support is slidably connected to the body and abuts against the boss through a second sealing gasket; The breathing disc abuts against the fixed support through the first sealing gasket, and the fixed support is provided with a first breathing passage. Further comprising a protective sleeve, a guide shaft and a second spring, the guide shaft is provided with a second breathing passage, the protective sleeve is provided with a third breathing passage, and the breathing passage comprises the first breathing passage, the second breathing passage and the third breathing passage; The protective sleeve is fixedly connected to the body; ​ ​ ​ ​ 7. The explosion relief valve of claim 6, wherein, ​ ​ The guide shaft is slidably connected to the body and located in the protective sleeve, and the fixing support is fixedly connected to the guide shaft; One end of the second spring is abutted against the body, and the other end of the second spring is connected to the end of the guide shaft away from the body.

8. The explosion relief valve of claim 7, wherein, A guide column is arranged in the protective sleeve, and the third breathing channel is arranged in the guide column. The guide column is slidably connected to the second breathing channel.

9. The explosion relief valve of claim 8, wherein, The end of the guide shaft away from the body is provided with a support body, one end of the second spring is abutted against the body, and the other end of the second spring is abutted against the support body.

10. The explosion relief valve of claim 6, wherein, A filter membrane and a pressing block are further included, the filter membrane is pressed on the fixing support through the pressing block, and the filter membrane is located at one end of the first breathing channel.

11. The explosion relief valve of claim 6, wherein, A second annular groove is arranged on the boss, and the second sealing gasket is arranged in the second annular groove.

12. The explosion relief valve of claim 11, wherein, A third annular groove is arranged on the side of the body away from the gland, and a third sealing gasket is arranged in the third annular groove.

13. A case characterized by comprising: The box body and the explosion-proof valve according to any one of claims 1 to 12 are included, and the explosion-proof valve is arranged on the box body.

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