Quick door opening component and mining flame-proof switch with same

Abstract

The utility model relates to a quick door opening member and a mining flame-proof switch with the same, which belong to the technical field of mining equipment, and are configured and connected on the flame-proof switch, the quick door opening member comprises a door plate limiting plate vertically arranged on the edge of one side of the opening part of a shell, and two shaft sleeves horizontally fixed on the outer side of a door plate in sequence along the vertical direction, according to the utility model, when the door plate is buckled at the opening part of the shell, the door plate is tightly attached to the edge of the opening part of the shell, so that the maximum gap between the shell and the explosion-proof combination surface of the door plate is smaller than or equal to 0.2 mm; according to the explosion-proof type switch, the national standard requirement of the explosion-proof type switch is met, meanwhile, when the door plate slides out of the position between the door plate limiting plate and the shell, the door plate can rotate around the hinge shaft of the hinge, so that the door plate on the shell is rapidly opened, rapid overhaul and maintenance can be achieved, and convenience of cover opening and operation and maintenance operation of the explosion-proof type switch is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining equipment, specifically relating to a quick-opening door component and a mining explosion-proof switch with the component. Background Technology

[0002] Currently, mining switches are crucial equipment in intelligent information systems for coal mines. They are primarily used to connect ground control centers and underground terminal equipment, facilitating data transmission and sharing between devices and systems. They also process and optimize terminal data before transmitting it to the ground control center via the network. Commands sent from the ground control center also need to be transmitted to the underground terminal equipment through the switches. Mining switches are the central hub for information transmission and interaction, and an indispensable basic channel in the construction of intelligent coal mines.

[0003] Mining switches are divided into two types: explosion-proof and intrinsically safe. Intrinsically safe switches are typically used as access points to connect underground business equipment into a ring network. They are characterized by their small size, few communication interfaces, and ease of disassembly and maintenance. Explosion-proof switches, on the other hand, are usually used as core switches or aggregation switches, handling all data exchange underground. Explosion-proof switches have numerous communication interfaces and access cables, resulting in a larger device size. According to GB / T 3836.2-2021, the maximum gap between the two explosion-proof mating surfaces of explosion-proof equipment must be less than or equal to 0.2mm. This ensures that even if an explosion occurs inside the equipment, it will not be transmitted to the outside through the mating surfaces, thus ensuring that the surrounding environment is unaffected. To ensure that the explosion-proof performance of explosion-proof switches meets national standards, existing explosion-proof switches typically use 15-20 fastening bolts to connect and fix the cover plate to the housing. However, using multiple fastening bolts makes opening the cover and maintaining the explosion-proof switch overly cumbersome. Summary of the Invention

[0004] In view of this, the present invention provides a quick-opening door component and a mine explosion-proof switch with the component to overcome the shortcomings of the prior art. The present invention meets the national standard requirements for explosion-proof switches and enables quick opening, inspection and maintenance of explosion-proof switches.

[0005] The technical solution of this utility model is: a quick-opening door component, configured and connected to an explosion-proof switch. The explosion-proof switch includes a housing, a door panel, and a switch disposed inside the housing. The door panel is connected to the housing via the quick-opening door component. The quick-opening door component includes: a door panel limiting plate vertically disposed on the edge of one side of the housing opening; the door panel limiting plate is fixedly connected to the housing; the door panel is fastened to the opening of the housing; one side of the door panel is located between the door panel limiting plate and the housing; and the door panel abuts against both the door panel limiting plate and the edge of the housing opening. Two bushings are horizontally fixed to the outside of the door panel in sequence along the vertical direction, and are located at the end of the door panel near the door panel limiting plate. Two shafts are horizontally inserted through the bushings and are coaxial with them. The shafts and bushings are slidably connected. Two hinges are set between the shafts and the housing in sequence. The hinges are fixedly connected to the end of the shaft near the door panel limiting plate and the housing, respectively. The door panel slides in the horizontal direction. When the door panel slides out from between the door panel limiting plate and the housing, the door panel rotates around the hinge axis of the hinge to open the door panel fastened to the housing.

[0006] Preferably, a linkage shaft is vertically provided between the two bushings, and the two ends of the linkage shaft are rotatably connected to the bushings respectively. An eccentric shaft mechanism is provided inside the bushing, and the linkage shaft is connected to the shaft rod through the eccentric shaft mechanism to drive the bushing to move along the shaft rod.

[0007] Preferably, the middle part of the linkage shaft is provided with a left and right rotation handle, which is hinged to the linkage shaft, and the hinge shaft is arranged in the horizontal direction.

[0008] A mine explosion-proof switch includes a housing, a door panel, and a switch installed inside the housing. The door panel is fastened to the opening of the housing. The switch also includes a quick-opening door component, which is located between the housing and the door panel and on one side of the opening of the housing.

[0009] Preferably, a door edge plate is horizontally fixed to the top of the door panel, and the door edge plate abuts against the top of the housing.

[0010] Preferably, the longitudinal section of the door edge panel is Z-shaped, one horizontal section of the door edge panel is fixedly connected to the top of the door panel, the other horizontal section abuts against the top of the housing, and the vertical section of the door edge panel abuts against the upper edge of the housing opening.

[0011] Preferably, an isolation rotating disk is provided on the other side of the housing opening. The isolation rotating disk is rotatably connected to the housing via a rotating shaft arranged in a horizontal direction. A door bolt is horizontally provided on the inner wall of the housing and is located on the side of the housing close to the isolation rotating disk. The door bolt is perpendicular to the door panel and is slidably connected to the housing along its length. A slot is provided on the inner side of the door panel, and one end of the door bolt is inserted into the slot. A cam mechanism is provided on the housing. The input end of the cam mechanism is connected to the rotating shaft, and its output end is connected to the door bolt to drive the door bolt to move.

[0012] Preferably, the cam mechanism includes: a cam limiting plate and a spring. One end of the rotating shaft extends into the housing. The cam limiting plate is fitted onto the rotating shaft and is coaxial with it. The cam limiting plate is located inside the housing. The end of the door bolt away from the door panel abuts against the edge of the cam limiting plate. The spring is disposed between the door bolt and the housing to drive the door bolt to move away from the door panel.

[0013] Preferably, a switch bracket is provided on the side of the cam limiting plate away from the inner wall of the housing. The switch bracket is fixedly connected to the inner wall of the housing. The rotating shaft is rotatably connected to the switch bracket. An isolating switch is fixedly provided on the side of the switch bracket away from the cam limiting plate. The adjusting shaft of the isolating switch is fixedly connected to the rotating shaft and is coaxial.

[0014] Preferably, an operating handle is fixed on one side of the isolation rotating disk.

[0015] Compared with the prior art, the quick-opening door component and the explosion-proof switch for mining equipped with the component provided by this utility model, through the cooperation of the door panel limiting plate, bushing, shaft, and hinge of the quick-opening door component, can ensure that when the door panel is fastened to the opening of the housing, the door panel and the edge of the opening of the housing are tightly fitted, and the maximum gap between the explosion-proof mating surface of the housing and the door panel is less than or equal to 0.2mm, which meets the national standard requirements for explosion-proof switches. At the same time, when the door panel slides out from between the door panel limiting plate and the housing, the door panel can rotate around the hinge axis of the hinge, thereby realizing the quick opening of the door panel on the housing, enabling rapid inspection and maintenance, and improving the convenience of opening the cover and operation and maintenance of the explosion-proof switch. Attached Figure Description

[0016] Figure 1 This is a perspective view of the explosion-proof switch for mining applications of this utility model;

[0017] Figure 2 This is a schematic diagram of the left side of the explosion-proof switch for mining applications of this utility model;

[0018] Figure 3 This is a schematic diagram of the right side of the explosion-proof switch for mining applications of this utility model;

[0019] Figure 4 This is an enlarged schematic diagram of the quick-opening door component of this utility model;

[0020] Figure 5 This is an enlarged schematic diagram of the inner side of the casing of this utility model;

[0021] Figure 6 This is an enlarged schematic diagram of the inner side of the door panel of this utility model. Detailed Implementation

[0022] This utility model provides a quick-opening door component and a mine explosion-proof switch with the component. The following is a description of the invention. Figures 1 to 6 The present invention will be described in the structural schematic diagram.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Currently, mining switches are crucial equipment in intelligent information systems for coal mines. They are primarily used to connect ground control centers and underground terminal equipment, facilitating data transmission and sharing between devices and systems. They also process and optimize terminal data before transmitting it to the ground control center via the network. Commands sent from the ground control center also need to be transmitted to the underground terminal equipment through the switches. Mining switches are the central hub for information transmission and interaction, and an indispensable basic channel in the construction of intelligent coal mines.

[0025] Mining switches are divided into two types: explosion-proof and intrinsically safe. Intrinsically safe switches are typically used as access points to connect underground business equipment into a ring network. They are characterized by their small size, few communication interfaces, and ease of disassembly and maintenance. Explosion-proof switches, on the other hand, are usually used as core switches or aggregation switches, handling all data exchange underground. Explosion-proof switches have numerous communication interfaces and access cables, resulting in a larger device size. According to GB / T 3836.2-2021, the maximum gap between the two explosion-proof mating surfaces of explosion-proof equipment must be less than or equal to 0.2mm. This ensures that even if an explosion occurs inside the equipment, it will not be transmitted to the outside through the mating surfaces, thus ensuring that the surrounding environment is unaffected. To ensure that the explosion-proof performance of explosion-proof switches meets national standards, existing explosion-proof switches typically use 15-20 fastening bolts to connect and fix the cover plate to the housing. However, using multiple fastening bolts makes opening the cover and maintaining the explosion-proof switch overly cumbersome.

[0026] Based on the above problems, this utility model provides a quick-opening door component and a mine explosion-proof switch with the component. Through the coordinated use of the door panel limiting plate, bushing, shaft, and hinge of the quick-opening door component, the door panel is tightly fitted to the edge of the housing opening when it is fastened to the housing. This ensures that the maximum gap between the explosion-proof mating surfaces of the housing and the door panel is less than or equal to 0.2mm, meeting the national standard requirements for explosion-proof switches. Simultaneously, when the door panel slides out from between the door panel limiting plate and the housing, it can rotate around the hinge axis, thereby enabling rapid opening of the door panel on the housing. This facilitates quick inspection and maintenance, improving the convenience of opening and maintaining the explosion-proof switch. The quick-opening door component and the mine explosion-proof switch of this utility model are simple to maintain, easy to use, and highly practical, making them worthy of promotion.

[0027] Reference Figure 1 and Figure 4 , Figure 1 This is a perspective view of the explosion-proof switch for mining in this embodiment. Figure 4 This is an enlarged schematic diagram of the quick-opening door component in this embodiment, as shown below. Figure 1 , 4 As shown, a quick-opening door component is configured and connected to an explosion-proof switch. The explosion-proof switch includes a housing 1, a door panel 2, and a switch disposed inside the housing 1. The door panel 2 is connected to the housing 1 via the quick-opening door component. The quick-opening door component includes: a door panel limiting plate 3 vertically disposed on the edge of one side of the opening of the housing 1, the door panel limiting plate 3 being fixedly connected to the housing 1, the door panel 2 being fastened to the opening of the housing 1, one side of the door panel 2 being located between the door panel limiting plate 3 and the housing 1, the door panel 2 abutting against the door panel limiting plate 3 and the edge of the opening of the housing 1 respectively, and two bushings 6. Two shafts are horizontally fixed to the outside of the door panel 2 in sequence along the vertical direction, and located at the end of the door panel 2 near the door panel limiting plate 3. Two shafts are horizontally inserted through the bushing 6 and are coaxial with it. The shafts and bushing 6 are slidably connected. Two hinges 5 are correspondingly set between the shafts and the housing 1. The hinges 5 are fixedly connected to the end of the shaft near the door panel limiting plate 3 and the housing 1, respectively. The door panel 2 slides in the horizontal direction. When the door panel 2 slides out from between the door panel limiting plate 3 and the housing 1, the door panel 2 rotates around the hinge axis of the hinge 5 to open the door panel 2 fastened to the housing 1.

[0028] In this embodiment, two hinge seats 4 can be arranged vertically on the left side of the opening of the housing 1, and the end of the hinge 5 away from the shaft is fixedly connected to the hinge seat 4.

[0029] Reference Figure 2 , Figure 2 This is a schematic diagram of the left side of the explosion-proof switch for mining in this embodiment. Figure 2As shown, as a further optimization, in this embodiment, a linkage shaft 7 is vertically provided between the two bushings 6. The two ends of the linkage shaft 7 are rotatably connected to the bushings 6 respectively. An eccentric shaft mechanism is provided inside the bushings 6. The linkage shaft 7 is connected to the shaft through the eccentric shaft mechanism to drive the bushings 6 to move along the shaft.

[0030] In this embodiment, the linkage shaft 7 is used in conjunction with the eccentric shaft mechanism. By driving the linkage shaft 7 to rotate, the shaft rod drives the door panel 2 to move to the left. The left side of the door panel 2 extends between the door panel limiting plate and the housing, so that the door panel 2 can be closed. At this time, the maximum gap between the two explosion-proof mating surfaces of the housing 1 and the door panel 2 is less than or equal to 0.2mm, ensuring compliance with national standards.

[0031] As a further optimization, in this embodiment, the middle part of the linkage shaft 7 is provided with a left and right rotating handle 8, which is hinged to the linkage shaft 7, and the hinge shaft is arranged in the horizontal direction.

[0032] In this embodiment, a left-right rotating handle 8 is provided in the middle of the linkage shaft 7. The left-right rotating handle 8 is connected to the linkage shaft 7 by a hinge shaft, which can realize the up-and-down rotation of the left-right rotating handle 8. It can not only drive the linkage shaft 7 to rotate, but also automatically fit with the linkage shaft 7 when not in use.

[0033] By rotating the handle 8 left and right, the linkage shaft 7 is driven to rotate, thereby causing the door panel 2 to move to the left. The door panel limiting plate makes the door panel 2 abut against the housing 1, so that the maximum gap between the explosion-proof joint surface of the housing and the door panel is less than or equal to 0.2mm, which meets the national standard requirements for explosion-proof switches.

[0034] A mine explosion-proof switch includes a housing 1, a door panel 2, and a switch disposed inside the housing 1. The door panel 2 is fastened to the opening of the housing 1. The switch also includes a quick-opening door component disposed between the housing 1 and the door panel 2, and located on one side of the opening of the housing 1.

[0035] In this embodiment, three baffles are installed on the inner side of the door panel 2. The baffles are fixed on the three edges of the door panel 2 away from the door panel limiting plate 3. When the door panel 2 abuts against the opening of the housing 1, the three baffles are located on the outer side of the housing 1 and abut against the upper, lower and right outer walls of the housing 1 respectively.

[0036] The explosion-proof mine switch in this embodiment mainly functions as an underground aggregation switch to carry all the data of the access switch and the downstream terminal equipment and to exchange the data with the ground core switch. Its advantage lies in the fact that the quick-opening door component optimizes the problem of traditional equipment using a large number of bolts for fastening, which makes it difficult to open the cover and maintain, and greatly improves the convenience of maintenance and repair of the explosion-proof mine switch.

[0037] As a further optimization, in this embodiment, a door edge plate 20 is horizontally fixed to the top of the door panel 2, and the door edge plate 20 abuts against the top of the housing 1.

[0038] In this embodiment, by horizontally setting a door edge plate 20 on the top of the door panel 2, the horizontal movement of the door panel 2 can be guided, further improving the stability of the connection between the door panel 2 and the housing 1, and at the same time preventing water from flowing into the housing 1 from the gap between the door panel 2 and the housing 1.

[0039] As a further optimization, the longitudinal section of the door edge plate 20 is Z-shaped. One horizontal section of the door edge plate 20 is fixedly connected to the top of the door plate 2, and the other horizontal section abuts against the top of the housing 1. The vertical section of the door edge plate 20 abuts against the upper edge of the opening of the housing 1.

[0040] In this embodiment, a door edge plate 20 with a Z-shaped longitudinal section is used. The two horizontal sections abut against the top of the door plate 2 and the shell 1, respectively, and the vertical section abuts against the upper edge of the opening of the shell 1, which further improves the guiding effect of the door plate 2 and the waterproofing effect.

[0041] Reference Figure 3 , Figure 3 This is a schematic diagram of the right side of the mine explosion-proof switch in this embodiment, as shown below. Figure 3 As shown, as a further optimization, in this embodiment, an isolation rotating disk 9 is provided on the other side of the opening of the housing 1. The isolation rotating disk 9 is rotatably connected to the housing 1 via a rotating shaft. The rotating shaft is arranged in a horizontal direction. A door bolt 15 is horizontally provided on the inner wall of the housing 1 and is located on the side of the housing 1 close to the isolation rotating disk 9. The door bolt 15 is perpendicular to the door panel 2. The door bolt 15 is slidably connected to the housing 1 along its length direction. A slot 21 is provided on the inner side of the door panel 2. One end of the door bolt 15 is inserted into the slot 21. A cam mechanism is provided on the housing 1. The input end of the cam mechanism is connected to the rotating shaft, and its output end is connected to the door bolt 15 to drive the door bolt 15 to move.

[0042] In this embodiment, the door panel 2 is mechanically locked by the cooperation of the isolating rotating disk 9, the door bolt 15, and the cam mechanism. The door bolt 15 is inserted into the slot 21, making the door panel 2 unable to move. The door panel 2 can only be opened when the door bolt 15 is removed from the slot 21.

[0043] In this embodiment, a door bolt bracket 14 is horizontally fixed on the inner wall of the housing 1, and a door bolt 15 is mounted on the door bolt bracket 14 and slidably connected to it.

[0044] Reference Figure 5 and Figure 6 , Figure 5 This is an enlarged schematic diagram of the inner side of the housing in this embodiment. Figure 6 This is an enlarged schematic diagram of the inner side of the door panel in this embodiment, as shown below. Figure 5, 6 As shown, as a further optimization, the cam mechanism in this embodiment includes: a cam limiting plate 13 and a spring 16. One end of the rotating shaft extends into the housing 1. The cam limiting plate 13 is mounted on the rotating shaft and is coaxial with it. The cam limiting plate 13 is located inside the housing 1. The end of the door bolt 15 away from the door panel 2 abuts against the edge of the cam limiting plate 13. The spring 16 is disposed between the door bolt 15 and the housing 1 to drive the door bolt 15 to move away from the door panel 2.

[0045] In this embodiment, the cam limiting plate 13 and the spring 16 work together. The isolation rotating plate 9 and the rotating shaft drive the cam limiting plate 13 to rotate, thereby activating the door bolt 15 to be inserted into the slot 21, restricting the left and right movement of the door panel 2. When it is necessary to open the door panel 2, the isolation rotating plate 9 is rotated in the opposite direction again, and the protrusion of the cam limiting plate 13 moves away from the position in contact with the door bolt 15. The spring 16 causes the door bolt 15 to move away from the side of the door panel 2, thereby allowing the door bolt 15 to move out of the slot 21, so that the door panel 2 can move to the right and be opened.

[0046] In this embodiment, one end of the spring 16 is connected to the door bolt 15, and the other end is connected to the door bolt bracket 14.

[0047] As a further optimization, in this embodiment, a switch bracket 17 is provided on the side of the cam limiting disk 13 away from the inner wall of the housing 1. The switch bracket 17 is fixedly connected to the inner wall of the housing 1, and the rotating shaft is rotatably connected to the switch bracket 17. An isolation switch 11 is fixedly provided on the side of the switch bracket 17 away from the cam limiting disk 13. The adjustment shaft of the isolation switch 11 is fixedly connected to the rotating shaft and is coaxial.

[0048] In this embodiment, the isolating switch 11 on the switch bracket 17 can be used to realize that when the isolating rotating disk 9 drives the cam limit disk 13 to rotate by the rotating shaft, the adjusting shaft of the isolating switch 11 is simultaneously driven to rotate to the power-off position, so as to automatically disconnect the power to the switch when the door panel 1 is opened, to prevent underground personnel from opening the cover with the power on in violation of regulations, and to ensure personal and property safety.

[0049] In this embodiment, the disconnect switch 11 is fixed to the switch bracket 17 by M5 screws 12, and the switch bracket 17 is fixed to the inner wall of the housing 1 by M8 screws 18.

[0050] As a further optimization, in this embodiment, an operating handle 10 is fixedly provided on one side of the isolation rotating disk 9.

[0051] In this embodiment, the operating handle 10 drives the isolation rotating disk 9 to rotate, thereby moving the door bolt 15 and the isolation switch 11. This enables the switch to be automatically powered off when the door panel 2 is opened and automatically restored when the door panel 2 is locked, greatly reducing the occurrence of misoperation and thus reducing the accident rate.

[0052] The above-disclosed embodiments are merely preferred embodiments of the present utility model. However, the embodiments of the present utility model are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A quick-opening door component, configured and connected to an explosion-proof switch, the explosion-proof switch comprising: The housing (1), the door panel (2), and the switch disposed inside the housing (1) are characterized in that the door panel (2) is connected to the housing (1) via a quick-opening door component, the quick-opening door component comprising: A door panel limiting plate (3) is vertically set on the edge of the opening of the housing (1). The door panel limiting plate (3) is fixedly connected to the housing (1). The door panel (2) is fastened to the opening of the housing (1). One side of the door panel (2) is located between the door panel limiting plate (3) and the housing (1). The door panel (2) abuts against the door panel limiting plate (3) and the edge of the opening of the housing (1) respectively. Two bushings (6) are horizontally fixed in sequence along the vertical direction on the outside of the door panel (2) and located at one end of the door panel (2) near the door panel limiting plate (3); Two shafts are horizontally inserted into the bushing (6) and coaxial with it, and the shafts are slidably connected to the bushing (6); Two hinges (5) are respectively set between the shaft and the housing (1). The hinges (5) are fixedly connected to the end of the shaft near the door panel limiting plate (3) and the housing (1). The door panel (2) slides in the horizontal direction. When the door panel (2) slides out from between the door panel limiting plate (3) and the housing (1), the door panel (2) rotates around the hinge axis of the hinge (5) to open the door panel (2) fastened to the housing (1).

2. The quick-opening door component according to claim 1, characterized in that, A linkage shaft (7) is vertically arranged between the two bushings (6). The two ends of the linkage shaft (7) are rotatably connected to the bushings (6). An eccentric shaft mechanism is provided inside the bushings (6). The linkage shaft (7) is connected to the shaft through the eccentric shaft mechanism to drive the bushings (6) to move along the shaft.

3. The quick-opening door component according to claim 2, characterized in that, The linkage shaft (7) is provided with a left and right rotating handle (8) in the middle. The left and right rotating handle (8) is hinged to the linkage shaft (7), and the hinge shaft is arranged in the horizontal direction.

4. A mine explosion-proof switch, comprising: The housing (1), the door panel (2), and the switch disposed inside the housing (1), wherein the door panel (2) is fastened to the opening of the housing (1), characterized in that it further includes a quick-opening door component as described in any one of claims 1-3, wherein the quick-opening door component is disposed between the housing (1) and the door panel (2) and is located on one side of the opening of the housing (1).

5. The explosion-proof switch for mining applications according to claim 4, characterized in that, A door edge plate (20) is horizontally fixed to the top of the door panel (2), and the door edge plate (20) abuts against the top of the housing (1).

6. The explosion-proof switch for mining applications according to claim 5, characterized in that, The longitudinal section of the door edge plate (20) is Z-shaped. One horizontal section of the door edge plate (20) is fixedly connected to the top of the door plate (2), and the other horizontal section abuts against the top of the housing (1). The vertical section of the door edge plate (20) abuts against the upper edge of the opening of the housing (1).

7. The explosion-proof switch for mining applications according to claim 4, characterized in that, An isolation rotating disk (9) is provided on the other side of the opening of the housing (1). The isolation rotating disk (9) is rotatably connected to the housing (1) through a rotating shaft. The rotating shaft is arranged in a horizontal direction. A door bolt (15) is horizontally provided on the inner wall of the housing (1) and is located on the side of the housing (1) close to the isolation rotating disk (9). The door bolt (15) is perpendicular to the door panel (2). The door bolt (15) is slidably connected to the housing (1) along its length direction. A slot (21) is opened on the inner side of the door panel (2). One end of the door bolt (15) is inserted into the slot (21). A cam mechanism is provided on the housing (1). The input end of the cam mechanism is connected to the rotating shaft, and its output end is connected to the door bolt (15) to drive the door bolt (15) to move.

8. The explosion-proof switch for mining applications according to claim 7, characterized in that, The cam mechanism includes a cam limiting plate (13) and a spring (16). One end of the rotating shaft extends into the housing (1). The cam limiting plate (13) is mounted on the rotating shaft and is coaxial with it. The cam limiting plate (13) is located inside the housing (1). The end of the door bolt (15) away from the door panel (2) abuts against the edge of the cam limiting plate (13). The spring (16) is arranged between the door bolt (15) and the housing (1) to drive the door bolt (15) to move away from the door panel (2).

9. The explosion-proof switch for mining applications according to claim 8, characterized in that, A switch bracket (17) is provided on the side of the cam limiting plate (13) away from the inner wall of the housing (1). The switch bracket (17) is fixedly connected to the inner wall of the housing (1). The rotating shaft is rotatably connected to the switch bracket (17). An isolation switch (11) is fixedly provided on the side of the switch bracket (17) away from the cam limiting plate (13). The adjusting shaft of the isolation switch (11) is fixedly connected to the rotating shaft and is coaxial.

10. The explosion-proof switch for mining applications according to claim 7, characterized in that, An operating handle (10) is fixed on one side of the isolation rotating disk (9).

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