Explosion-proof device and gas insulated switchgear
By installing a filter element at the opening of the deflector, the problems of solid debris flying out and impurities clogging in existing explosion-proof devices are solved, achieving safe and reliable gas discharge and protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-04-10
AI Technical Summary
In existing explosion-proof devices used in gas-insulated switchgear, the openings of the deflector are too large, causing solid fragments to fly out and injure personnel. Furthermore, impurities can easily clog the gas exhaust channels, affecting the protective effect.
A filter element is installed at the opening of the flow guide, with filter holes designed to block solid debris and impurities, ensuring normal gas discharge.
It effectively blocks solid debris from flying out, preventing injury to on-duty and patrol personnel, and prevents impurities from clogging the passage, ensuring smooth gas discharge and maintaining the protective effect of the explosion-proof device.
Smart Images
Figure CN224110766U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas insulation switchgear technical field especially relates to a kind of explosion-proof device and the gas insulation switchgear with the explosion-proof device of this. BACKGROUND
[0002] Gas insulation switchgear is abbreviated as GIS, because its excellent characteristics, is widely used in power system, as the main control unit of power transmission.GIS as the most important link in power transmission system is often used for outdoor overhead wiring connection, part is installed in outdoor part is installed in indoor, and its safety reliability is very important.GIS is usually filled with certain pressure insulation gas as insulating medium inside.But when short-circuit fault occurs in GIS, due to tank sealing, gas in tank cannot be released, and the pressure of gas will continue to rise, eventually possibly explosion to cause damage to tank, also possibly endanger the personal safety of on-duty, patrol personnel.
[0003] In prior art, GIS is usually provided with explosion-proof device, when short-circuit fault occurs in GIS, and the gas pressure in tank is too high, explosion-proof device can break to make high-pressure gas flow out of tank to avoid explosion.Explosion-proof device is usually provided with fairing, for changing the flow direction of ejected gas, to avoid high-pressure gas directly impacting on-duty, patrol personnel.In order to ensure the speed of gas discharge, the existing fairing usually has larger opening, and solid fragments produced when explosion-proof device breaks are easy to fly out from opening to cause damage to surroundings, injure on-duty, patrol personnel, and meanwhile, impurities outside are easy to enter fairing inside to block the channel of gas discharge. SUMMARY
[0004] The utility model aims at at least solving one of the technical problems existing in prior art.Therefore, the utility model provides an explosion-proof device, which can avoid solid fragments flying out from the opening of fairing, and avoid impurities accumulating inside fairing.
[0005] The utility model further provides a kind of gas insulation switchgear with the above-mentioned explosion-proof device.
[0006] According to the first aspect of the utility model discloses a kind of explosion-proof devices, including connecting mechanism, bursting disc, fairing and filter piece, the connecting mechanism has pressure relief hole, the connecting mechanism can be connected with the gas insulated switchgear, the pressure relief hole can be communicated with the inside of the gas insulated switchgear;The bursting disc blocks the pressure relief hole, and the bursting disc is connected with the connecting mechanism;The fairing is covered in the pressure relief hole and is connected with the connecting mechanism, and the fairing is equipped with opening, and the inside of the fairing is equipped with flow guide channel, and the opening is communicated with the flow guide channel and the outside of the fairing;When the bursting disc breaks, the pressure relief hole is communicated with the flow guide channel;The filter piece is arranged in the opening, and the filter piece is connected with the fairing, and the filter piece has filter hole, and the filter hole is communicated with the flow guide channel and the outside of the fairing.
[0007] According to the utility model embodiment, the explosion-proof device has at least the following beneficial effects:
[0008] The explosion-proof device of the utility model embodiment is provided with the filter piece at the opening of the fairing. When the bursting disc breaks, the gas in the gas insulated switchgear can be normally discharged from the filter hole of the filter piece. The filter piece can block the solid fragments from flying out of the opening, avoid the damage to the surroundings caused by the solid fragments, and avoid the harm to the guards and patrol personnel caused by the solid fragments. The filter piece can also block the impurities from entering the flow guide channel from the opening, to prevent the impurities from accumulating in the flow guide channel and hindering the gas discharge. Thus, the filter piece can ensure that the protection effect of the explosion-proof device on the GIS tank body is not affected when the short-circuit fault occurs in the GIS, and the solid fragments generated during pressure relief will not cause damage to the surroundings and will not harm the guards and patrol personnel.
[0009] According to some embodiments of the utility model, the connecting mechanism includes a connecting seat and a fixed plate, the pressure relief hole is arranged in the connecting seat, the connecting seat can be connected with the gas insulated switchgear, the fixed plate is a hollow annular piece, the fixed plate is arranged along the circumference of the pressure relief hole and is connected with the connecting seat, and the circumference of the bursting disc is fixed between the connecting seat and the fixed plate.
[0010] According to some embodiments of the utility model, a first sealing structure is arranged between the connecting seat and the bursting disc;When the bursting disc blocks the pressure relief hole, the first sealing structure can seal the gap between the connecting seat and the bursting disc.
[0011] According to some embodiments of the utility model, a second sealing structure is arranged between the connecting seat and the gas insulated switchgear;When the connecting seat is connected with the gas insulated switchgear, the second sealing structure can seal the gap between the connecting seat and the gas insulated switchgear.
[0012] According to some embodiments of the present invention, a third sealing structure is provided between the fixing plate and the connecting seat; when the fixing plate is connected to the connecting seat, the third sealing structure can seal the gap between the fixing plate and the connecting seat.
[0013] According to some embodiments of this utility model, it also includes a waterproof plate located inside the flow channel, the waterproof plate blocking the pressure relief hole and connected to the connecting mechanism; when the rupture disc ruptures, the waterproof plate ruptures to make the pressure relief hole communicate with the flow channel.
[0014] According to some embodiments of the present invention, a pressure plate is provided on the side of the waterproof membrane away from the rupture disc. The pressure plate is arranged circumferentially along the pressure relief hole and connected to the connecting mechanism. The periphery of the waterproof membrane is fixed between the pressure plate and the connecting mechanism.
[0015] According to some embodiments of the present invention, the bottom of the flow guide is provided with a drainage groove, which connects the flow guide channel and the outside of the flow guide.
[0016] According to some embodiments of this utility model, the axial direction of the flow guiding channel is perpendicular to the axial direction of the pressure relief hole; when the rupture disc breaks, the flow guiding channel guides the gas in the gas-insulated switchgear to be discharged along a direction perpendicular to the axis of the pressure relief hole.
[0017] A gas-insulated switchgear according to a second aspect of the present invention includes a gas-insulated switchgear body, wherein the gas-insulated switchgear body is equipped with the aforementioned explosion-proof device.
[0018] A gas-insulated switchgear according to an embodiment of the present invention has at least the following beneficial effects:
[0019] This embodiment of the gas-insulated switchgear is equipped with an explosion-proof device, and a filter element is installed at the opening of the flow guide shroud of the explosion-proof device. When the rupture disc ruptures, the gas inside the gas-insulated switchgear can be discharged normally through the filter holes of the filter element. The filter element can prevent solid fragments from flying out from the opening, avoiding damage to the surrounding area and preventing solid fragments from injuring the personnel on duty or patrolling. The filter element can also prevent impurities from entering the flow guide channel from the opening, preventing impurities from accumulating in the flow guide channel and obstructing gas discharge. Thus, the filter element can ensure that the explosion-proof device's protection effect on the GIS tank is not affected when a short circuit fault occurs inside the GIS, and at the same time, the solid fragments generated during depressurization will not cause damage to the surrounding area or injure the personnel on duty or patrolling.
[0020] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of the application. BRIEF DESCRIPTION OF DRAWINGS
[0021] The present application will be further described below in connection with the drawings and examples, in which:
[0022] Figure 1 The structure diagram of the explosion-proof device of the present application is shown in the figure.
[0023] Figure 2 The exploded view of the explosion-proof device is shown in the figure. Figure 1 The sectional view of the explosion-proof device is shown in the figure.
[0024] Figure 3 The exploded view of the explosion-proof device is shown in the figure. Figure 1 The exploded view of the explosion-proof device is shown in the figure.
[0025] Figure 4 The structure diagram of the connecting mechanism and the bursting disc of the present application is shown in the figure.
[0026] Reference signs: connecting mechanism 100, pressure relief hole 110, connecting seat 120, first sealing structure 121, second sealing structure 122, fixed plate 130, third sealing structure 131, fourth sealing structure 132, bursting disc 200, flow guide cover 300, flow guide channel 310, opening 320, drainage groove 330, filter element 400, filter hole 410, waterproof plate 500, pressing plate 600. DETAILED DESCRIPTION
[0027] The embodiments of the present application will be described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0028] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.
[0029] In the description of the utility model, if several meanings are more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. Understand as not including the number, above, below, within, etc. Understand as including the number. If it is described to the first, the second is only used for distinguishing the purpose of technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the relationship between the indicated technical features.
[0030] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be understood in a broad sense, and the specific meaning of the above words in the utility model can be reasonably determined by the person skilled in the art in combination with the specific content of the technical scheme.
[0031] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0032] Referring to Figures 1 to 4 , according to the first aspect embodiment of the utility model, an explosion-proof device, including connecting mechanism 100, bursting disc 200, fairing 300 and filter piece 400, connecting mechanism 100 has pressure relief hole 110, connecting mechanism 100 can be connected with gas insulated switchgear, pressure relief hole 110 can be communicated with the inside of gas insulated switchgear;Bursting disc 200 blocks pressure relief hole 110, bursting disc 200 is connected with connecting mechanism 100, bursting disc 200 can be broken under certain pressure;Fairing 300 is covered in pressure relief hole 110 and is connected with connecting mechanism 100, fairing 300 is equipped with opening 320, the inside of fairing 300 is equipped with flow guide channel 310, opening 320 communicates flow guide channel 310 and the outside of fairing 300;When bursting disc 200 breaks, pressure relief hole 110 is communicated with flow guide channel 310;Filter piece 400 is arranged in opening 320, filter piece 400 is connected with fairing 300, filter piece 400 has filter hole 410, filter hole 410 communicates flow guide channel 310 and the outside of fairing 300.
[0033] Specifically, when the gas pressure in the gas insulated switchgear is too high, the bursting disc 200 breaks, the gas in the gas insulated switchgear is discharged from the pressure relief hole 110 to the flow guide channel 310, and then the gas passes through the filter piece 400 from the filter hole 410 and is discharged from the opening 320 to the outside of the fairing 300.
[0034] By adopting the above structure, when the rupture disc 200 breaks, the gas in the gas insulated switchgear can be normally discharged from the filter hole 410 of the filter piece 400. The filter piece 400 can block the solid fragments from flying out from the opening 320, avoid the solid fragments from causing damage to the surroundings, and avoid the solid fragments from hurting the on-duty and patrol personnel. The filter piece 400 can also block the impurities from entering the flow guide channel 310 from the opening 320, and prevent the impurities from accumulating in the flow guide channel 310 to hinder the gas discharge. Thus, the filter piece 400 can ensure that the protection effect of the explosion-proof device on the GIS tank body is not affected when a short-circuit fault occurs in the GIS, and the solid fragments generated during pressure relief will not cause damage to the surroundings and will not hurt the on-duty and patrol personnel.
[0035] It should be noted that in the embodiment, the filter piece 400 is in a grid structure. Thus, the efficiency of gas discharge can be improved while the entry and exit of solid fragments and impurities are blocked, and the filter piece 400 can also be in a mesh structure or other structure with filter holes, which is not specifically limited in the utility model.
[0036] With reference to Figures 1 to 4 In some embodiments of the utility model, the connecting mechanism 100 includes a connecting seat 120 and a fixing plate 130, the pressure relief hole 110 is arranged on the connecting seat 120, the connecting seat 120 can be connected with the gas insulated switchgear, the fixing plate 130 is a hollow annular piece, the fixing plate 130 is arranged along the circumference of the pressure relief hole 110 and is connected with the connecting seat 120, and the periphery of the rupture disc 200 is fixed between the connecting seat 120 and the fixing plate 130.
[0037] By adopting the above structure, the connecting seat 120 and the fixing plate 130 can cooperate to fix the rupture disc 200, and the periphery of the rupture disc 200 is fixed and clamped between the connecting seat 120 and the fixing plate 130, so that loosening is less likely to occur.
[0038] It should be noted that in some embodiments, the fixing plate 130 is detachably connected with the connecting seat 120. Thus, the rupture disc can be more easily detached or installed when the rupture disc is replaced or overhauled, and the connecting mechanism 100 as a whole does not need to be detached, so that the maintenance cost and time are greatly reduced.
[0039] With reference to Figure 2 and Figure 4 In some embodiments of the utility model, a first sealing structure 121 is arranged between the connecting seat 120 and the rupture disc 200, and when the rupture disc 200 blocks the pressure relief hole 110, the first sealing structure 121 can seal the gap between the connecting seat 120 and the rupture disc 200.
[0040] By adopting the above structure, the first sealing structure 121 can prevent the gas in the gas insulated switchgear from being discharged from the gap between the connecting seat 120 and the rupture disc 200 when the gas insulated switchgear is normally working or the rupture disc 200 is broken. Thus, the normal operation of the gas insulated switchgear can be ensured, and the risk of gas leakage is reduced; and the gas from the gap can also be prevented from rushing out to cause harm to the on-duty and patrol personnel.
[0041] It can be understood that the first sealing structure 121 is a sealing groove and a sealing ring, the sealing groove is arranged on the connecting seat 120 or the rupture disc 200, and the sealing ring is embedded in the sealing groove. When the connecting seat 120 is connected with the rupture disc 200, the sealing ring seals the gap between the connecting seat 120 and the rupture disc 200. Of course, according to actual needs, the first sealing structure 121 can also be a gasket, a gasket, or the like, and the utility model is not limited in this regard.
[0042] Referring to Figure 2 and Figure 4 In some embodiments of the utility model, a second sealing structure 122 is arranged between the connecting seat 120 and the gas insulated switchgear; and when the connecting seat 120 is connected with the gas insulated switchgear, the second sealing structure 122 can seal the gap between the connecting seat 120 and the gas insulated switchgear.
[0043] By adopting the above structure, the second sealing structure 122 can prevent the gas in the gas insulated switchgear from being discharged from the gap between the connecting seat 120 and the gas insulated switchgear. Thus, the normal operation of the gas insulated switchgear can be ensured, and the risk of gas leakage is reduced.
[0044] It should be noted that in some embodiments, the number of second sealing structures 122 is two, and the two second sealing structures 122 are arranged along the radial direction of the pressure relief hole 110. Thus, the high-voltage gas insulated switchgear can be more effectively sealed, and the risk of gas leakage is reduced. Of course, according to actual needs, the number of second sealing structures 122 can also be three or more, and the utility model is not limited in this regard.
[0045] It can be understood that the second sealing structure 122 is a sealing groove and a sealing ring, the sealing groove is arranged on the connecting seat 120 or the gas insulated switchgear, and the sealing ring is embedded in the sealing groove. When the connecting seat 120 is connected with the gas insulated switchgear, the sealing ring seals the gap between the connecting seat 120 and the gas insulated switchgear. Of course, according to actual needs, the second sealing structure 122 can also be a gasket, a gasket, or the like, and the utility model is not limited in this regard.
[0046] Referring to Figure 2 and Figure 4In some embodiments of the utility model, third sealing structure 131 is arranged between fixed plate 130 and connecting seat 120, and when fixed plate 130 is connected with connecting seat 120, third sealing structure 131 can seal the gap between fixed plate 130 and connecting seat 120.
[0047] By the above structure, third sealing structure 131 can prevent the gas in the gas insulated switchgear from being discharged from the gap between connecting seat 120 and fixed plate 130 when the gas insulated switchgear is working normally or the rupture disc 200 is broken. Thus, the normal operation of the gas insulated switchgear can be ensured, and the risk of gas leakage is reduced. In addition, the gas from the gap can be prevented from rushing out to cause harm to the on-duty and patrol personnel.
[0048] It can be understood that third sealing structure 131 is a sealing groove and a sealing ring. The sealing groove is arranged on connecting seat 120 or fixed plate 130, and the sealing ring is embedded in the sealing groove. When connecting seat 120 is connected with fixed plate 130, the sealing ring seals the gap between connecting seat 120 and fixed plate 130. Of course, according to actual needs, third sealing structure 131 can also be a gasket, a gasket, and the like. The utility model does not make specific limitations on this.
[0049] Referring to Figures 1 to 3 In some embodiments of the utility model, a waterproof plate 500 is further included. The waterproof plate 500 is located inside the flow guide channel 310, and the waterproof plate 500 blocks the pressure relief hole 110 and is connected with the connecting mechanism 100. When the rupture disc 200 is broken, the waterproof plate 500 is broken to make the pressure relief hole 110 communicate with the flow guide channel 310.
[0050] By the above structure, when the explosion-proof device is installed outdoors, the waterproof plate 500 can prevent the rain from corroding and damaging the rupture disc 200. When pressure relief, the gas first breaks through the rupture disc 200 and the waterproof plate 500, so that the waterproof plate 500 can reduce the impact force of the gas. The waterproof plate 500 can also prevent the installer from accidentally touching the rupture disc 200 during installation and disassembly.
[0051] It should be noted that in this embodiment, the structural strength of the waterproof plate 500 is less than that of the rupture disc 200, so as to ensure that when the rupture disc 200 is broken, the gas can break through the waterproof plate 500 instantaneously, and the effectiveness of the explosion-proof device is ensured. Specifically, the rupture disc 200 is made of metal, and the waterproof plate 500 is made of polytetrafluoroethylene. Of course, according to actual needs, the waterproof plate 500 can also be made of other materials with a structural strength less than that of the rupture disc 200. The utility model does not make specific limitations on this.
[0052] It should be noted that in some embodiments, the waterproof plate 500 and the connecting mechanism 100 have a fourth sealing structure 132, and when the waterproof plate 500 is connected with the connecting mechanism 100, the fourth sealing structure 132 can block the gap between the waterproof plate 500 and the connecting mechanism 100, thereby reducing the risk of gas leakage, and also preventing external gas or rainwater from penetrating into the gap between the waterproof plate 500 and the connecting mechanism 100.
[0053] With reference to Figures 1 to 3 In some embodiments of the utility model, the waterproof plate 500 is provided with a pressing plate 600 away from the rupture disc 200, the pressing plate 600 is arranged along the circumference of the pressure relief hole 110 and connected with the connecting mechanism 100, and the peripheral edge of the waterproof plate 500 is fixed between the pressing plate 600 and the connecting mechanism 100.
[0054] By adopting the above structure, the pressing plate 600 can fix and strengthen the peripheral edge of the waterproof plate 500, and ensure that the waterproof plate 500 can be normally broken by the gas when the rupture disc 200 breaks.
[0055] With reference to Figures 1 to 3 In some embodiments of the utility model, the bottom of the flow guide cover 300 is provided with a drainage groove 330, and the drainage groove 330 is connected with the flow guide channel 310 and the outside of the flow guide cover 300.
[0056] By adopting the above structure, when the explosion-proof device is installed outdoors, the drainage groove 330 can timely drain the accumulated rainwater in the flow guide channel 310, and prevent the rainwater from blocking the flow guide channel 310 and affecting the discharge of the gas.
[0057] It should be noted that in some embodiments, the number of drainage grooves 330 is multiple, and all the drainage grooves 330 are arranged along the circumference of the pressure relief hole 110. Therefore, when the flow guide cover 300 is installed at different angles, the rainwater can be drained from the drainage grooves 330.
[0058] With reference to Figures 1 to 3 In some embodiments of the utility model, the axis direction of the flow guide channel 310 is perpendicular to the axis direction of the pressure relief hole 110, and when the rupture disc 200 breaks, the flow guide channel 310 guides the gas in the gas insulated switchgear to be discharged along the direction perpendicular to the axis of the pressure relief hole 110.
[0059] By adopting the above structure, the gas in the gas insulated switchgear is discharged along the direction perpendicular to the axis of the pressure relief hole 110, thereby the discharged gas can be avoided from directly impacting the guards or patrol personnel or other equipment, and the guards or patrol personnel or other equipment can be avoided from being damaged.
[0060] With reference to Figures 1 to 4 Figures 1 to 4According to the second aspect of the utility model discloses a kind of gas insulated switchgear, including gas insulated switchgear body, gas insulated switchgear body is equipped with the explosion-proof device of above-mentioned embodiment.
[0061] The gas insulated switchgear provided by the embodiment of the utility model can ensure that the protection effect of the explosion-proof device on the GIS tank is not affected when a short-circuit fault occurs inside the GIS, and the solid fragments generated during pressure relief will not cause damage to the surroundings and will not harm the guards and patrol personnel.
[0062] The above detailed description of the embodiments of the utility model is combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the scope of knowledge possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model. In addition, the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.
Claims
1. An explosion protection device for a gas-insulated switchgear, characterized in that The utility model relates to a kind of gas insulated switchgear pressure relief device, comprising: Connecting mechanism (100), the connecting mechanism (100) has pressure relief hole (110), the connecting mechanism (100) can be connected with the gas insulated switchgear, the pressure relief hole (110) can be communicated with the inside of the gas insulated switchgear; Bursting disc (200), the bursting disc (200) blocks the pressure relief hole (110), and the bursting disc (200) is connected with the connecting mechanism (100); Fairing (300), the fairing (300) is covered in the pressure relief hole (110) and is connected with the connecting mechanism (100), the fairing (300) is equipped with opening (320), and the inside of the fairing (300) is equipped with fairing channel (310), and the opening (320) is communicated with the fairing channel (310) and the outside of the fairing (300);When the bursting disc (200) breaks, the pressure relief hole (110) is communicated with the fairing channel (310); Filter element (400), the filter element (400) is arranged in the opening (320), and the filter element (400) is connected with the fairing (300), and the filter element (400) has filter hole (410), and the filter hole (410) is communicated with the fairing channel (310) and the outside of the fairing (300).
2. A flameproof apparatus according to claim 1, wherein The connecting mechanism (100) includes connecting seat (120) and fixed plate (130), the pressure relief hole (110) is equipped in the connecting seat (120), and the connecting seat (120) can be connected with the gas insulated switchgear, and the fixed plate (130) is hollow annular piece, and the fixed plate (130) is arranged along the circumference of the pressure relief hole (110) and is connected with the connecting seat (120), and the circumference of the bursting disc (200) is fixed between the connecting seat (120) and the fixed plate (130).
3. A flameproof apparatus according to claim 2, wherein First sealing structure (121) is equipped between the connecting seat (120) and the bursting disc (200); When the bursting disc (200) blocks the pressure relief hole (110), the first sealing structure (121) can seal the gap between the connecting seat (120) and the bursting disc (200).
4. A flameproof apparatus according to claim 2, wherein Second sealing structure (122) is equipped between the connecting seat (120) and the gas insulated switchgear; When the connecting seat (120) is connected with the gas insulated switchgear, the second sealing structure (122) can seal the gap between the connecting seat (120) and the gas insulated switchgear.
5. A flameproof apparatus according to claim 2, wherein Third sealing structure (131) is equipped between the fixed plate (130) and the connecting seat (120); When the fixed plate (130) is connected with the connecting seat (120), the third sealing structure (131) can seal the gap between the fixed plate (130) and the connecting seat (120).
6. A flameproof apparatus according to claim 1, wherein Further comprising a waterproof plate (500) located inside the flow guide channel (310), the waterproof plate (500) blocks the pressure relief hole (110) and is connected with the connecting mechanism (100); When the rupture disc (200) breaks, the waterproof plate (500) breaks to make the pressure relief hole (110) communicate with the flow guide channel (310).
7. A flameproof apparatus according to claim 6, characterised in that The waterproof plate (500) is provided with a pressing plate (600) on the side away from the rupture disc (200), the pressing plate (600) is arranged along the circumference of the pressure relief hole (110) and is connected with the connecting mechanism (100), and the circumference of the waterproof plate (500) is fixed between the pressing plate (600) and the connecting mechanism (100).
8. The explosion-proof device of claim 1, wherein The bottom of the flow guide cover (300) is provided with a drainage groove (330) which communicates the flow guide channel (310) and the outside of the flow guide cover (300).
9. The explosion-proof device of claim 1, wherein The axis direction of the flow guide channel (310) is perpendicular to the axis direction of the pressure relief hole (110); When the rupture disc (200) breaks, the flow guide channel (310) guides the gas in the gas insulated switchgear to be discharged along the direction perpendicular to the axis of the pressure relief hole (110).
10. A gas insulated switchgear, characterized by Further comprising: A gas insulated switchgear body which is provided with the explosion-proof device according to any one of claims 1 to 9.