Composite explosion venting device

Abstract

The invention discloses a composite explosion venting device which comprises a flange support, a protective cover installed on the flange support in a rotatable mode and heat preservation cotton arranged in the protective cover, the protective cover comprises a first cover body and a second cover body, the first cover body and the second cover body are installed on the flange support in a mutual opening mode and are both in sealing contact with the flange support, the first cover body is adsorbed and fixed with the flange bracket through a first magnetic module, the edge of the first cover body is pressed and covered on the edge of the second cover body to form sealing contact, and the first cover body and the second cover body are both fixed on the flange bracket; an active explosion venting assembly is arranged between the second cover body and the flange support and comprises a detection control module and an execution mechanism, wherein the detection control module is used for detecting abnormal signals to judge opening, and the execution mechanism is electrically connected with the detection control module and used for driving the second cover body to be opened relative to the flange support in the abnormal state. The explosion venting device has active mode explosion venting and passive mode explosion venting, and is safer and more reliable to use.

Description

Technical fields:

[0001] This invention relates to the field of energy storage equipment technology, and specifically to a composite explosion venting device. Background technology:

[0002] With the continuous development of energy storage technology, energy storage containers are an important part of energy systems such as photovoltaic power stations and wind-solar hybrid power stations. The safety of the entire energy storage battery cabinet is very important, including the cabinet and the energy storage battery. When the battery experiences thermal runaway, it will cause a large amount of flammable gas to accumulate, and the pressure inside the cabinet will rise rapidly, which can easily lead to the risk of cabinet explosion, seriously endangering equipment and personal safety.

[0003] Chinese utility model patent application number 202320816409.5 discloses a pressure relief plate for energy storage equipment. The plate includes a rectangular body, comprising, from top to bottom, a climate protection cover, insulation cotton, an outlet flange, an upper gasket, a strength membrane, and a lower gasket. One side of the climate protection cover is an installation side, the side of the strength membrane corresponding to the installation side is a sealing side, and the other three sides are pressure relief sides. Each pressure relief side has an opening that can be opened for pressure relief at a preset pressure threshold. This design uses a climate protection cover to limit the opening direction, reducing the impact of climate on the plate and extending its overall service life, while minimizing the impact on the pressure relief. The insulation cotton provides insulation and weather resistance, the strength membrane enables pressure relief at a preset pressure threshold, and the first and second limiting rings improve the stability of the metal structure.

[0004] The pressure relief method of the above-mentioned explosion relief plate is as follows: one side of the strength membrane corresponding to the installation side is the sealing side, and the other three sides are the pressure relief sides. Several openings are provided at equal intervals on the pressure relief sides. These openings can meet the requirement that the strength membrane opens under a specific pressure threshold, thereby realizing the pressure relief function.

[0005] The aforementioned single-opening explosion relief plate can only be torn and vented along the direction of the pressure relief edge. The weather protection cover is prone to getting stuck due to the material, and its explosion relief opening angle is small, which reduces the explosion relief rate.

[0006] Furthermore, the aforementioned explosion relief panels cannot detect flammable gases generated by malfunctions in the battery compartment or energy storage cabinet in the early stages; they rely solely on a purely mechanical, passive valve opening mechanism, resulting in low reliability.

[0007] In view of the above, the inventors propose the following technical solution. Summary of the Invention:

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a composite explosion relief device.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The composite explosion relief device includes a flange bracket, a protective cover rotatably mounted on the flange bracket, and thermal insulation cotton disposed inside the protective cover. The protective cover includes a first cover and a second cover, which are installed on the flange bracket in a mutually openable manner and are in sealed contact with the flange bracket. The first cover is attracted and fixed to the flange bracket by a first magnetic attraction module. The edge of the first cover presses onto the edge of the second cover and forms a sealed contact, thereby fixing both the first cover and the second cover to the flange bracket. An active explosion relief component is provided between the second cover and the flange bracket. The active explosion relief component includes a detection and control module for detecting abnormal signals and determining opening, and an actuator electrically connected to the detection and control module for driving the second cover to open relative to the flange bracket in an abnormal state.

[0010] Furthermore, in the above technical solution, the first magnetic module includes a first magnetic component and a second magnetic component that can be attracted and fixed together. The first magnetic component is fixed to the inner side of the edge of the first cover, the second magnetic component is fixed to the flange bracket, and the edge of the second cover is provided with an avoidance opening for the first magnetic component and / or the second magnetic component to pass through.

[0011] Furthermore, in the above technical solution, either the first magnetic attractor or the second magnetic attractor is a permanent magnet, and the other is an iron sheet; or, both the first magnetic attractor and the second magnetic attractor are permanent magnets.

[0012] Furthermore, in the above technical solution, the actuator includes a second magnet fixed inside the second housing and an electromagnet disposed on the flange bracket and corresponding to the second magnet, and the magnetic polarity generated by the electromagnet after being energized is opposite to the polarity of the second magnet toward the electromagnet.

[0013] Furthermore, in the above technical solution, the actuator also includes a spring disposed on the flange bracket. The upper end of the spring contacts the inner side of the edge of the first cover, and the spring is in a compressed state. At this time, the elastic force generated by the spring is less than the magnetic attraction force between the first magnetic attractor and the second magnetic attractor in the first magnetic attractor module.

[0014] Furthermore, in the above technical solution, the spring is sleeved on the outside of the electromagnet.

[0015] Furthermore, in the above technical solution, the electromagnet, the spring, and the second magnetic component in the first magnetic module are all mounted on a fixed base, which is detachably mounted on the flange bracket by screws.

[0016] Furthermore, in the above technical solution, the detection and control module includes a housing, a battery installed inside the housing, a controller, and a sensor fixed outside the housing for detecting abnormal signals. The controller is electrically connected to the battery, the sensor, and the actuator.

[0017] Furthermore, in the above technical solution, a lower sealing gasket is attached to the lower end of the flange bracket; an upper sealing gasket is provided at the upper end of the flange bracket to seal and assemble with the inner sides of the first cover and the second cover, and the inner edge of the first cover and the outer edge of the second cover are also sealed and assembled by a sealing ring; a shaft is provided on the outside of both the first cover and the second cover, and the shaft is installed with an external bearing provided on the flange bracket.

[0018] Furthermore, in the above technical solution, the upper end of the flange bracket is bent to form a horizontally distributed flange, and an installation groove is formed between the lower end of the flange and the surface of the flange bracket. The inner side of the upper sealing gasket is embedded in the installation groove, and the outer side of the upper sealing gasket protrudes from the installation groove and contacts the inner side of the first cover and the second cover to achieve a sealed assembly.

[0019] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0020] 1. The protective cover in this invention has a double-opening structure. When opened, the first cover and the second cover open from the middle to both sides, which makes it easier to open and the opening angle is larger. At the same time, it reduces the height of the entire product to the minimum and will not be affected by the material and will not be prone to jamming. In addition, its explosion venting opening angle is larger and the explosion venting rate is higher.

[0021] 2. This invention has at least an active mode explosion venting and a passive mode explosion venting. In the active mode explosion venting: the active explosion venting component operates by using a detection and control module to detect abnormal signals. It only activates when the detection and control module detects an abnormal signal (such as abnormal smoke or temperature), controlling the actuator to open. This actuator drives the second enclosure to open relative to the flange support. At this time, the opening force of the actuator is greater than the magnetic attraction force of the first magnetic module, thus driving the second enclosure to open relative to the flange support. Simultaneously, the opening of the second enclosure pushes the first enclosure to open outwards, achieving the purpose of active explosion venting. Furthermore, this active explosion venting component can operate independently and achieves explosion venting even when the internal pressure is relatively low, making it safer and more reliable to use. The first and second covers can detect gas escaping from faulty batteries at an early stage and open them in advance to release flammable gases, greatly reducing the risk of fire and explosion. The passive explosion venting mode is used when the active explosion venting mode fails. Since the first and second covers are fixed to the flange bracket by the magnetic force of the first magnetic module, and the magnetic force of the first magnetic module serves as the sealing force, when the pressure inside the enclosure / cabinet exceeds the magnetic force of the first magnetic module, the first and second covers will also open under pressure, achieving the same explosion venting function. This is used as a safety measure. Specifically, the passive explosion venting mode compensates for the inability to actively open the first and second covers due to potential malfunctions in the active explosion venting mode. Attached image description:

[0022] Figure 1 It is a perspective view of the present invention;

[0023] Figure 2 This is a perspective view of the invention from another angle;

[0024] Figure 3 This is an exploded view of the present invention;

[0025] Figure 4 This is a perspective view of the protective cover in this invention;

[0026] Figure 5 This is a perspective view of the first cover after it is opened in this invention;

[0027] Figure 6 This is a perspective view of the first and second covers after they are opened in this invention;

[0028] Figure 7 This is a cross-sectional view of the detection and control module in this invention;

[0029] Figure 8 This is a partial assembly diagram of the first magnetic suction module and the active explosion relief component in this invention;

[0030] Figure 9This is a structural diagram of the present invention applied to an energy storage cabinet. Detailed implementation method:

[0031] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0032] See Figure 1-9 As shown, a composite explosion relief device includes a flange support 1, a protective cover 200 rotatably mounted on the flange support 1, and thermal insulation cotton 4 disposed inside the protective cover 200, wherein the protective cover 200 and the flange support 1 form a sealed assembly.

[0033] The flange bracket 1 adopts a flange mounting type, which corresponds one-to-one with the flanges preset on the installation interface of products such as containers. The installation and fixing can be done with ordinary screws, nuts and washers. When there are special requirements for the installation height, rivet nuts can also be used for installation.

[0034] The protective cover 200 has a double-opening structure. Specifically, the protective cover 200 includes a first cover 2 and a second cover 3, which are installed on the flange bracket 1 in a mutually opening manner and are in sealed contact with the flange bracket 1. When opened, the first cover 2 and the second cover 3 open from the middle to both sides, making opening easier and resulting in a larger opening angle. This also minimizes the overall height of the product and avoids the risk of jamming due to material limitations. Furthermore, it provides a larger explosion-proof opening angle and a higher explosion-proof rate. The first cover 2 and the second cover 3 are both equipped with the aforementioned thermal insulation cotton 4.

[0035] A lower sealing gasket 11 is attached to the lower end of the flange bracket 1. The size of the lower sealing gasket 11 is smaller than the size of the lower end of the flange bracket 1. An upper sealing gasket 12 is provided at the upper end of the flange bracket 1 to seal and assemble with the inner surfaces of the first cover 2 and the second cover 3. This upper sealing gasket 12 is an internal structure, which solves the problem of accelerated aging of the upper sealing gasket 12 caused by long-term exposure to the external environment. Furthermore, the inner edge of the first cover 2 and the outer edge of the second cover 3 are also sealed and assembled with a sealing ring 13, which achieves a stable seal.

[0036] The first cover 2 has downwardly extending first sealing flanges 201 formed on both sides. After the inner wall of the first cover 2 contacts the upper surface of the upper sealing gasket 12, the inner side of the first sealing flange 201 contacts the outer surface of the upper sealing gasket 12, thus forming a stable sealing assembly structure. Similarly, the second cover 3 has downwardly extending second sealing flanges 301 formed on both sides. After the inner wall of the second cover 3 contacts the upper surface of the upper sealing gasket 12, the inner side of the second sealing flange 301 contacts the outer surface of the upper sealing gasket 12, thus forming a stable sealing assembly structure.

[0037] The inner side of the first cover 2 has a concave surface 202. The sealing ring 13 is fixed in the concave surface 202 by glue or other means. When the inner side of the first cover 2 is pressed against the outer side of the second cover 3, the sealing ring 13 contacts the outer side of the second cover 3 to form a sealed assembly. Furthermore, the sealing ring 13 surrounds the first magnetic module 5, thus providing better sealing performance.

[0038] The first cover 2 and the second cover 3 are both provided with shafts 100 on their exteriors, and the shafts 100 are installed with external bearings 10 provided on the flange bracket 1, so that the first cover 2 and the second cover 3 can rotate more smoothly. After the first cover 2 and the second cover 3 are opened, they can rotate easily, and the explosion venting angle can be directly increased to 180 degrees, maximizing the explosion venting area, while reducing the height of the entire product to the minimum.

[0039] The upper end of the flange bracket 1 is bent to form a horizontally distributed flange 101. The lower end of the flange 101 forms an installation groove 102 between it and the surface of the flange bracket 1. The inner side of the upper sealing gasket 12 is embedded in the installation groove 102. The outer side of the upper sealing gasket 12 protrudes from the installation groove 102 and contacts the inner side of the first cover 2 and the second cover 3 to achieve a sealed assembly. Its assembly structure is simple and can improve the stability of the assembly structure.

[0040] The first cover 2 is attached to the flange bracket 1 by the first magnetic module 5. The edge of the first cover 2 presses against the edge of the second cover 3 to form a sealed contact, and both the first cover 2 and the second cover 3 are fixed to the flange bracket 1. At this time, in the initial state, the first cover 2 and the second cover 3 are fixed to the flange bracket 1 by the magnetic attraction of the first magnetic module 5, which serves as the source of sealing force. An active explosion relief component 6 is provided between the second cover 3 and the flange bracket 1. The active explosion relief component 6 includes a detection and control module 61 for detecting abnormal signals to determine opening, and an actuator 62 electrically connected to the detection and control module 61 for driving the second cover 3 to open relative to the flange bracket 1 in an abnormal state.

[0041] In its initial state, the first cover 2 and the second cover 3 are fixed to the flange bracket 1 by the magnetic attraction of the first magnetic module 5, with the magnetic attraction of the first magnetic module 5 serving as the source of sealing force. The invention has at least an active mode explosion venting and a passive mode explosion venting. In the active mode explosion venting: the active explosion venting component 6 operates by using a detection and control module 61 to detect abnormal signals. It only determines to open when the detection and control module 61 detects an abnormal signal (smoke, temperature, etc.), and controls the actuator 62 to operate. The actuator 62 drives the second cover 3 to open relative to the flange bracket 1. At this time, the opening force of the actuator 62 is greater than the magnetic attraction of the first magnetic module 5, thus driving the second cover 3 to open relative to the flange bracket 1. Simultaneously, the second cover 3 pushes the first cover 2 to open outwards, achieving the purpose of active explosion venting. The active explosion venting component 6 can... Operating independently and capable of explosion venting even at relatively low internal pressure, it is safer and more reliable in use. Specifically, it can detect gas escaping from faulty batteries at an early stage, opening the first and second enclosures in advance to release flammable gases, greatly reducing the risk of fire and explosion. Passive mode explosion venting: When the active mode explosion venting fails, the first and second enclosures 2 and 3 are fixed to the flange bracket 1 by the magnetic attraction of the first magnetic module 5, using the magnetic attraction of the first magnetic module 5 as the sealing force. When the pressure inside the enclosure / cabinet exceeds the magnetic attraction of the first magnetic module 5, the first and second enclosures 2 and 3 will also open under pressure, achieving the function of explosion venting. This serves as a safety measure, specifically: the passive mode explosion venting compensates for the inability to actively open the first and second enclosures due to potential malfunctions in the active mode explosion venting. The combined use of these two methods can effectively ensure the stability of the explosion venting device.

[0042] The specific structure of the first magnetic module 5 is described below.

[0043] The first magnetic module 5 includes a first magnetic member 51 and a second magnetic member 52 that can be attracted and fixed together. The first magnetic member 51 is fixed to the inner side of the edge of the first cover 2, and the second magnetic member 52 is fixed to the flange bracket 1. The edge of the second cover 3 is provided with a clearance opening 30 for the first magnetic member 51 and / or the second magnetic member 52 to pass through, so that after the edge of the first cover 2 covers the edge of the second cover 3, the first magnetic member 51 and the second magnetic member 52 can contact each other through the clearance opening 30 to achieve magnetic attraction and fixation.

[0044] Either the first magnetic attractor 51 or the second magnetic attractor 52 is a permanent magnet, and the other is an iron sheet; or, both the first magnetic attractor 51 and the second magnetic attractor 52 are permanent magnets. In this embodiment, the first magnetic attractor 51 is an iron sheet, and the second magnetic attractor 52 is a permanent magnet, which has a lower design cost and allows for better control of the magnetic attraction between them.

[0045] The specific structure of the actuator 62 is described below.

[0046] The actuator 62 includes a second magnet 621 fixed inside the second cover 3 and an electromagnet 622 disposed on the flange bracket 1 and corresponding to the second magnet 621. The magnetic polarity generated by the electromagnet 622 after being energized is opposite to the polarity of the second magnet 621 facing the electromagnet 622. That is, when the electromagnet 622 is energized, the polarity of the magnetic force generated by the electromagnet 622 is opposite to the polarity of the second magnet 621 facing the electromagnet 622, resulting in a repulsive force between them. Under the pushing action of this repulsive force, the second magnet 621 inside the second cover 3 is pushed outward. At this time, the repulsive force (i.e., the opening force) is greater than the magnetic attraction force of the first magnetic module 5, thus enabling the second cover 3 and the first cover 2 to be pushed outward, thereby achieving the purpose of opening.

[0047] To improve opening force, the following design was also implemented:

[0048] The actuator 62 also includes a spring 623 mounted on the flange bracket 1. The upper end of the spring 623 contacts the inner edge of the first cover 2, and the spring 623 is in a compressed state. At this time, the elastic force generated by the spring 623 is less than the magnetic attraction force between the first magnetic attractor 51 and the second magnetic attractor 52 in the first magnetic attractor module 5. When the actuator 62 is working, the electromagnet 622 generates a magnetic force with the polarity below that of the second magnet 621 after being energized, so as to push the second cover 3 and the first cover 2 outward to achieve the purpose of opening. At this time, the spring 623 is released to generate an outward elastic force, which can also push the second cover 3 and the first cover 2 outward, thereby enhancing the outward opening force and ensuring that the second cover 3 and the first cover 2 can be opened outward, thus achieving a more reliable explosion relief function.

[0049] The spring 623 is sleeved on the outside of the electromagnet 622, which makes the assembly structure more compact, reduces the space occupied, and ensures that the spring 623 is installed more stably.

[0050] The electromagnet 622, spring 623, and the second magnetic component 52 in the first magnetic module 5 are all mounted on the fixed base 7. The fixed base 7 is detachably mounted on the flange bracket 1 by screws, making it easier to assemble and disassemble.

[0051] The structure of the detection and control module 61 is described in detail below.

[0052] The detection and control module 61 includes a housing 611, a battery 614 and a controller 612 installed inside the housing 611, and a sensor 613 fixed outside the housing 611 for detecting abnormal signals. The controller 612 is electrically connected to the battery 614, the sensor 613, and the actuator 62. The battery 614 supplies power to the entire active explosion relief assembly 6. The sensor 613 detects abnormal signals and includes any one or more of a temperature sensor, a smoke sensor, and a pressure sensor. The controller 612 receives the signals detected by the sensor 613 and determines whether an abnormality exists. If an abnormality is detected, the controller controls the battery 614 to energize the electromagnet 622, causing the electromagnet 622 to generate magnetic force.

[0053] When in use, this invention can be applied to the energy storage cabinet 9, such as... Figure 9 As shown.

[0054] In summary, the protective cover 200 of this invention has a double-opening structure. When opened, the first cover 2 and the second cover 3 open from the middle to both sides, making opening easier and resulting in a larger opening angle. This also minimizes the overall height of the product and avoids the risk of jamming due to material limitations. Furthermore, it offers a larger explosion-proof opening angle and a higher explosion-proof rate. This invention has at least an active explosion-proof mode and a passive explosion-proof mode. In the active explosion-proof mode, the active explosion-proof component 6 operates by using a detection and control module 61 to detect abnormal signals. Opening is only determined when the detection and control module 61 detects an abnormal signal (such as abnormal smoke or temperature). The actuator 62 then operates, driving the second cover 3 to open relative to the flange bracket 1. At this time, the opening force of the actuator 62 is greater than the magnetic attraction force of the first magnetic module 5, thus driving the second cover 3 to open relative to the flange bracket 1. Simultaneously, the second cover 3 pushes the first cover... 2 also opens outwards to achieve active explosion venting. The active explosion venting component 6 can operate independently and can vent explosions when the internal pressure is relatively low, making it safer and more reliable to use. Specifically, it can detect the gas escaping from a faulty battery at an early stage and open the first and second covers in advance to release flammable gases, which can greatly reduce the risk of fire and explosion. Passive mode explosion venting: When the active mode explosion venting fails abnormally and cannot work, since the first cover 2 and the second cover 3 are fixed to the flange bracket 1 by the magnetic attraction of the first magnetic module 5, and the magnetic attraction of the first magnetic module 5 is used as the sealing force, when the pressure inside the box / cabinet is greater than the magnetic attraction of the first magnetic module 5, the first cover 2 and the second cover 3 will also be opened under pressure, which can also achieve the function of explosion venting. It is used as a safety solution. Specifically, the role of passive mode explosion venting is to make up for the shortcomings of active mode explosion venting, which may cause failures that prevent the active opening of the first and second covers.

[0055] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A composite explosion relief device, comprising a flange support (1), a protective cover (200) rotatably mounted on the flange support (1), and insulation cotton (4) disposed within the protective cover (200), characterized in that: The protective cover (200) includes a first cover (2) and a second cover (3) which are installed on the flange bracket (1) in a mutually openable manner and are in sealed contact with the flange bracket (1). The first cover (2) is attached to the flange bracket (1) by a first magnetic module (5). The edge of the first cover (2) presses against the edge of the second cover (3) to form a sealed contact, and the first cover (2) and the second cover (3) are both fixed on the flange bracket (1). An active explosion relief assembly (6) is provided between the second cover (3) and the flange bracket (1). The active explosion relief assembly (6) includes a detection control module (61) for detecting abnormal signals to determine opening and an actuator (62) electrically connected to the detection control module (61) for driving the second cover (3) to open relative to the flange bracket (1) in an abnormal state.

2. The composite explosion venting device according to claim 1, characterized in that: The first magnetic module (5) includes a first magnetic component (51) and a second magnetic component (52) that can be attracted and fixed together. The first magnetic component (51) is fixed to the inner side of the edge of the first cover (2), and the second magnetic component (52) is fixed to the flange bracket (1). The edge of the second cover (3) is provided with a clearance opening (30) for the first magnetic component (51) and / or the second magnetic component (52) to pass through.

3. The composite explosion venting device according to claim 2, characterized in that: Either the first magnetic accumulator (51) or the second magnetic accumulator (52) is a permanent magnet, and the other is an iron sheet; or, both the first magnetic accumulator (51) and the second magnetic accumulator (52) are permanent magnets.

4. A composite explosion venting device according to any one of claims 1-3, characterized in that: The actuator (62) includes a second magnet (621) fixed inside the second cover (3) and an electromagnet (622) disposed on the flange bracket (1) and corresponding to the second magnet (621). The magnetic polarity generated by the electromagnet (622) after being energized is opposite to the polarity of the second magnet (621) toward the electromagnet (622).

5. A composite explosion venting device according to claim 4, characterized in that: The actuator (62) also includes a spring (623) disposed on the flange bracket (1). The upper end of the spring (623) contacts the inner side of the edge of the first cover (2), and the spring (623) is in a compressed state. At this time, the elastic force generated by the spring (623) is less than the magnetic attraction force between the first magnetic attractor (51) and the second magnetic attractor (52) in the first magnetic attractor module (5).

6. A composite explosion venting device according to claim 5, characterized in that: The spring (623) is sleeved on the outside of the electromagnet (622).

7. A composite explosion venting device according to claim 5, characterized in that: The electromagnet (622), spring (623) and the second magnetic attractor (52) in the first magnetic attractor module (5) are all mounted on the fixed base (7), which is detachably mounted on the flange bracket (1) by screws.

8. A composite explosion venting device according to claim 5, characterized in that: The detection and control module (61) includes a housing (611), a battery (614) installed inside the housing (611), a controller (612), and a sensor (613) fixed outside the housing (611) for detecting abnormal signals. The controller (612) is electrically connected to the battery (614), the sensor (613), and the actuator (62).

9. A composite explosion venting device according to any one of claims 5-8, characterized in that: The flange bracket (1) has a lower sealing gasket (11) attached to its lower end; the flange bracket (1) has an upper sealing gasket (12) that is sealed to the inner side of the first cover (2) and the second cover (3), and the inner side of the edge of the first cover (2) and the outer side of the edge of the second cover (3) are also sealed to each other by a sealing ring (13); the outer side of the first cover (2) and the second cover (3) are both provided with a shaft (100), and the shaft (100) is installed with an external bearing (10) provided on the flange bracket (1).

10. A composite explosion venting device according to claim 9, characterized in that: The upper end of the flange bracket (1) is bent to form a horizontally distributed flange (101). The lower end of the flange (101) and the surface of the flange bracket (1) form an installation groove (102). The inner side of the upper sealing gasket (12) is embedded in the installation groove (102). The outer side of the upper sealing gasket (12) protrudes from the installation groove (102) and contacts the inner side of the first cover (2) and the second cover (3) to achieve a sealed assembly.

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