A mining explosion-proof permanent magnet vacuum high-voltage power distribution device

Abstract

The present invention relates to the technical field of explosion-proof electrical equipment for mines, and the present invention discloses an explosion-proof permanent magnetic vacuum high-voltage power distribution device for mines, which comprises a cabinet, an isolation oil pool, a lifting platform and a permanent magnetic vacuum circuit breaker. The cabinet is hollow, an explosion-proof cabinet door is hinged on one side, a plurality of vertically extending guide rods are arranged around the inner periphery, the lifting platform is slidably connected to the guide rod, the isolation oil pool is arranged at the bottom center of the cabinet, the interface of the permanent magnetic vacuum circuit breaker is slid downwardly arranged on the lifting platform, the three-phase wiring copper bar is arranged in the isolation oil pool, and the circuit breaker interface is arranged on the top. Compared with the prior art, the present invention has the advantages that the interface of the permanent magnetic vacuum circuit breaker and the connected copper bar are immersed in the oily liquid pool to achieve isolation from the external air, and when the permanent magnetic vacuum circuit breaker is replaced, the interface can also be placed below the oily liquid level, which can avoid contact with external flammable and explosive gases, and ensure the explosion-proof and flameproof effect of the device.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof electrical equipment for mines, and in particular to an explosion-proof permanent magnet vacuum high-voltage power distribution device for mines. Background Art

[0002] The permanent magnet vacuum high-voltage power distribution device is a high-voltage electrical power distribution equipment with a permanent magnet vacuum circuit breaker as the core component, and is commonly used for switches of various large electrical equipment.

[0003] Mining electrical equipment is a special type of electrical device. Due to the presence of flammable and explosive gases in the mining environment, the powered equipment needs to be isolated from the environment to prevent sparks or arcs from igniting flammable and explosive gases when the electrical appliances are working. Based on its characteristics, the permanent magnetic vacuum high-voltage distribution device needs to replace the permanent magnetic vacuum circuit breaker more frequently. Therefore, the connection between it and the cable is usually designed as an interface structure that is easy to disassemble and assemble. However, in mining explosion-proof occasions, when the distribution device cabinet door is opened to replace the permanent magnetic vacuum circuit breaker, its interface and the cables or copper busbars at the corresponding position will inevitably come into contact with the external environment. Although in most cases it is difficult to generate arcs or sparks when the normally closed permanent magnetic vacuum circuit breaker is connected, there is still a certain risk of air breakdown between the other equipment exposed to the environment and the pressurized power supply lines during the replacement work. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing explosion-proof permanent magnet vacuum high-voltage power distribution device for mining cannot provide sufficient explosion-proof effect when replacing the permanent magnet vacuum circuit breaker, and provides an explosion-proof permanent magnet vacuum high-voltage power distribution device for mining.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a mining explosion-proof permanent magnet vacuum high-voltage power distribution device, which includes a cabinet, an isolation oil pool, a lifting platform and a permanent magnet vacuum circuit breaker. The cabinet is hollow, and an explosion-proof cabinet door is hinged on one side. A plurality of vertically extending guide rods are arranged around the inside. The lifting platform is slidably connected to the guide rods, the isolation oil pool is arranged at the bottom center of the cabinet, and the permanent magnet vacuum circuit breaker is slidably arranged on the lifting platform.

[0006] The isolation oil pool is divided into a busbar pool and a main line pool. The busbar pool and the main line pool are arranged side by side and isolated from each other. The busbar pool and the main line pool are both provided with three-phase wiring copper bars. Each phase of the three-phase wiring copper bars is electrically connected to the circuit breaker joint, and the interface of the circuit breaker joint is arranged upward.

[0007] When the permanent magnetic vacuum circuit breaker is slidably arranged on the lifting platform, its interface remains in a downward position, and each interface is slidably sleeved with the first isolation sleeve, and the circuit breaker joint is fixedly sleeved with the second isolation sleeve. The first isolation sleeve and the second isolation sleeve are arranged in cooperation, and a sealed isolation is formed when the two are connected. A first spring is arranged between the top of the first isolation sleeve and the sliding sleeve of the permanent magnetic vacuum circuit breaker. The first spring is arranged as a compression spring. When the first isolation sleeve and the second isolation sleeve are connected, a downward elastic force is generated. The second isolation sleeve sinks and is embedded in the top of the busbar pool and the main line pool. Both sides of the busbar pool and the main line pool are hinged with a flip cover plate, and the second isolation sleeve is isolated from the external environment after the flip cover plate is buckled.

[0008] Furthermore, a transfer tool is arranged outside the permanent magnetic vacuum circuit breaker, and a plurality of rollers are arranged on both sides of the transfer tool. The lifting platform is arranged in a U-shape, and first slide rails matching the rollers are arranged on the inner surfaces of both sides of the opening.

[0009] Furthermore, a first slider is slidably arranged near the bottom of the guide rod, a second spring is arranged at the bottom of the first slider, the second spring is arranged as a compression spring, and its bottom is in contact with the bottom surface of the cabinet, a second slide rail is arranged on the side of the first slider, and a second slider is slidably arranged in the second slide rail, connecting rods are arranged on both sides of the back of the flip cover, the ends of the connecting rods extend to the sides of the first slider and are hingedly connected to the second slider, and the connecting rods are hingedly connected to the isolation oil pool housing near the end.

[0010] Furthermore, the outside of the lifting platform is provided with a plurality of sliding sleeves cooperating with the guide rods, the sliding sleeves are arranged above the first sliding block, a third spring is arranged between the sliding sleeves and the first sliding block, and the elastic force of the second spring is set to be smaller than the elastic force of the third spring.

[0011] Furthermore, multiple locking rods are hingedly provided on the inner walls on both sides of the cabinet. The middle part of the locking rod is hollow. A third spring is provided in the hollow part inside the locking rod away from the hinge point with the cabinet. The third spring is configured as a tension spring, and its end is connected to the inner wall of the cabinet.

[0012] Furthermore, a synchronization rod is fixedly connected between the locking rods located on the same side of the cabinet body, and a locking handle is provided on the side of the locking rod close to the explosion-proof cabinet door.

[0013] Furthermore, a surface of the explosion-proof cabinet door facing the interior of the cabinet is provided with a plurality of buckles that cooperate with the locking handle.

[0014] Furthermore, explosion-proof junction boxes are provided on both sides of the busbar pool and the main line pool, and the three-phase connection copper busbar passes through the side walls of the busbar pool and the main line pool and extends to the interior of the explosion-proof junction box.

[0015] Furthermore, a mounting frame is fixedly provided on the top of the guide rod, and the mounting frame is fixedly connected to a lifting power device. The two sides of the bottom of the lifting power device are set as output ends, and the top center is set as an input end. The output end of the lifting power device is provided with a lifting screw for driving the lifting platform, and the input end of the lifting power device is provided with a lifting handwheel.

[0016] The advantage of the present invention over the prior art is that the interface of the permanent magnetic vacuum circuit breaker and the connected copper busbar are immersed in an oily liquid pool to achieve isolation from the outside air. When the permanent magnetic vacuum circuit breaker is replaced, the exposed cables or copper busbars can also be isolated from the outside world, thereby ensuring the explosion-proof and flameproof effect of the device. To achieve the above advantages, the present invention has the following features:

[0017] 1. Change the installation arrangement of the circuit breaker interface. The interface and the corresponding copper busbar are installed in an oil pool. Correspondingly, the permanent magnetic vacuum circuit breaker is installed with the interface facing downward by providing special connection tooling and lifting platform.

[0018] 2. In order to adapt to the above installation method, the traditional circuit breaker trolley is changed to a vertically movable form, and a new linkage structure of the flip cover is provided according to the movement mode.

[0019] 3. In order to minimize the volatilization of oily liquids, a set of special sealing sleeves is provided according to the interface of the permanent magnetic vacuum circuit breaker, so that the oily liquid pool can be sealed and isolated after the permanent magnetic vacuum circuit breaker is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the explosion-proof cabinet door of the present invention when it is in an open state;

[0022] Figure 3 It is a schematic diagram of the structure inside the cabinet of the present invention;

[0023] Figure 4 It is a structural schematic diagram of a permanent magnetic vacuum circuit breaker and a switching tool of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the transfer tooling of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the isolation oil pool of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure inside the isolation oil pool of the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the first isolation sleeve and the second isolation sleeve of the present invention;

[0028] Fig. 9 It is a schematic cross-sectional structure diagram of the first isolation sleeve and the second isolation sleeve of the present invention;

[0029] Fig.10 is a schematic structural diagram of a first sliding block of the present invention;

[0030] Fig.11 Yes Fig.10 Schematic diagram at a in the middle;

[0031] Fig.12 is a structural schematic diagram of the locking rod of the present invention in a locked state;

[0032] Fig.13 Yes Fig.12 Schematic diagram of the structure at b in the middle;

[0033] Fig.14 is a schematic structural diagram of the locking rod of the present invention in an unlocked state;

[0034] Fig.15 Yes Fig.14 Schematic diagram of the structure at point c in the middle.

[0035] As shown in the figure: 1. Cabinet; 2. Explosion-proof cabinet door; 3. Explosion-proof junction box; 4. Oil pipeline; 5. Oil drain pipe; 6. Buckle; 7. Isolation oil pool; 8. Guide rod; 9. Mounting frame; 10. Lifting power device; 11. Lifting screw; 12. Lifting hand wheel; 13. Lifting platform; 14. Permanent magnetic vacuum circuit breaker; 15. First slide rail; 16. Third slide rail; 17. Transfer tooling; 18. Roller; 19. Flip cover; 20. Connecting rod; 21. First slider; 22. Second slide rail; 23. Second slider; 24. Second spring; 25. Bus pool; 26. Main line pool; 27. Three-phase wiring copper busbar; 28. Circuit breaker connector; 29. ​​Sleeve; 30. Third spring; 31. First isolation sleeve; 32. Second isolation sleeve; 33. First spring; 34. Locking rod; 35. Fourth spring; 36. Locking handle; 37. Synchronous rod. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0037] Combined with Figure 1 , Attachment Figure 2 and attached Figure 3 A mining explosion-proof permanent magnetic vacuum high-voltage power distribution device comprises a cabinet 1, an isolation oil pool 7, a lifting platform 13 and a permanent magnetic vacuum circuit breaker 14. The cabinet 1 is hollow, and an explosion-proof cabinet door 2 is hinged on one side. A plurality of vertically extending guide rods 8 are arranged around the inside. The lifting platform 13 is slidably connected to the guide rods 8, the isolation oil pool 7 is arranged at the bottom center of the cabinet 1, and the permanent magnetic vacuum circuit breaker 14 is slidably arranged on the lifting platform 13.

[0038] Combined with Figure 3 A mounting frame 9 is fixedly provided on the top of the guide rod 8, and the mounting frame 9 is fixedly connected to a lifting power device 10. The two sides of the bottom of the lifting power device 10 are set as output ends, and the top center is set as an input end. A lifting screw 11 for driving a lifting platform 13 is provided at the output end of the lifting power device 10, and a lifting hand wheel 12 is provided at the input end of the lifting power device 10.

[0039] Combined with Figure 6 and attached Figure 7 The isolation oil pool 7 is divided into a busbar pool 25 and a main line pool 26. The busbar pool 25 and the main line pool 26 are arranged side by side and isolated from each other. The busbar pool 25 and the main line pool 26 are both provided with a three-phase wiring copper bus 27. Each phase of the three-phase wiring copper bus 27 is electrically connected to a circuit breaker connector 28, and the interface of the circuit breaker connector 28 is arranged upward.

[0040] Combined with Figure 7 The busbar pool 25 and the main line pool 26 are both connected with an oil pipeline 4 and an oil drain pipe 5. The oil pipeline 4 and the oil drain pipe 5 need to be insulated. Transformer oil or other oily liquid with insulating arc extinguishing ability under high pressure is poured into the busbar pool 25 and the main line pool 26 through the oil pipeline 4. When the transformer oil reaches the end of its service life, it can be discharged through the oil drain pipe 5 and replaced with new transformer oil through the oil pipeline 4.

[0041] Combined with Figure 8 and attached Fig. 9 When the permanent magnetic vacuum circuit breaker 14 is slidably arranged on the lifting platform 13, its interface remains in a downward state, and each interface is slidably sleeved with the first isolation sleeve 31, and the circuit breaker joint 28 is fixedly sleeved with the second isolation sleeve 32. The first isolation sleeve 31 and the second isolation sleeve 32 are arranged in cooperation, and corresponding sealing rings are provided on the contact surfaces of the two, and sealed isolation is formed after docking. A first spring 33 is provided between the top of the first isolation sleeve 31 and the sliding sleeve of the permanent magnetic vacuum circuit breaker 14. The first spring 33 is set as a compression spring, and a downward elastic force is generated when the first isolation sleeve 31 and the second isolation sleeve 32 are docked.

[0042] Combined with Figure 6 , Attachment Figure 8 and attached Fig.10 The second isolation sleeve 32 is sunken and embedded in the top of the busbar pool 25 and the main line pool 26. The connection between the second isolation sleeve 32 and the top of the busbar pool 25 and the main line pool 26 needs to be insulated and sealed. The busbar pool 25 and the main line pool 26 are both hingedly provided with a flip cover 19. The flip cover 19 is installed with a sealing ring according to the flip cover 19 facing the busbar pool 25 and the main line pool 26. After the flip cover 19 is buckled, the second isolation sleeve 32 is isolated from the external environment.

[0043] Combined with Figure 3, Attachment Figure 4 and attached Figure 5 A transfer tooling 17 is arranged outside the permanent magnetic vacuum circuit breaker 14, and a plurality of rollers 18 are arranged on both sides of the transfer tooling 17. The lifting platform 13 is arranged in a U-shape, and the inner surfaces on both sides of the opening thereof are provided with first slide rails 15 matching the rollers 18. A third slide rail 16 matching the first slide rail 15 is arranged near the explosion-proof cabinet door 2 on the inner wall of the cabinet body 1.

[0044] To facilitate the disassembly and assembly of the permanent magnet vacuum circuit breaker 14, a trolley matching the permanent magnet vacuum circuit breaker 14 is required according to the actual height of the device when the present invention is implemented. The trolley should have a slide rail matching the roller 18 to ensure that when the permanent magnet vacuum circuit breaker 14 and the transfer tooling 17 are placed on the trolley, the rollers 18 are aligned with the third slide rail 16, and the staff can directly push the permanent magnet vacuum circuit breaker 14 and the transfer tooling 17 into the lifting platform 13.

[0045] Combined with Fig.10 and attached Fig.11 A first slider 21 is slidably arranged near the bottom of the guide rod 8, a second spring 24 is arranged at the bottom of the first slider 21, the second spring 24 is arranged as a compression spring, and its bottom contacts the bottom surface of the cabinet 1, a second slide rail 22 is arranged on the side of the first slider 21, a second slider 23 is slidably arranged in the second slide rail 22, connecting rods 20 are arranged on both sides of the back of the flip cover 19, the ends of the connecting rods 20 extend to the sides of the first slider 21 and are hingedly connected to the second slider 23, and the connecting rod 20 is hingedly connected to the outer shell of the isolation oil pool 7 near the end.

[0046] When the flip cover 19 is buckled onto the top of the busbar tank 25 and the main line tank 26 and the first slider 21 descends, the above structures can cooperate with each other to flip the flip cover 19 upward to expose the second isolation sleeve 32.

[0047] When the flip cover 19 is opened and the first slider 21 rises, the above structures can cooperate with each other to make the flip cover 19 buckle, so that the second isolation sleeve 32 is isolated from the outside.

[0048] Combined with Figure 8 and attached Fig.10 The lifting platform 13 is provided with a plurality of sleeves 29 for matching with the guide rods 8 on the outside. The sleeves 29 are arranged above the first slider 21. A third spring 30 is arranged between the sleeves 29 and the first slider 21. The elastic force of the second spring 24 is less than the elastic force of the third spring 30.

[0049] Since the second isolation sleeve 32 is connected in a socket manner and has a hollow outline, the environment inside the busbar pool 25 and the main line pool 26 will be connected to the outside through the second isolation sleeve 32. The transformer oil in the busbar pool 25 and the main line pool 26 will evaporate slightly when in a non-sealed state. The transformer oil molecules can be considered as flammable organic molecules, and their volatilization increases the risk of environmental explosion to a certain extent.

[0050] When the permanent magnetic vacuum circuit breaker 14 is installed in the present invention, the lifting platform 13 should be in the lowered position, and the first isolation sleeve 31 and the second isolation sleeve 32 are in a docking state, at which time the busbar pool 25 and the main line pool 26 are isolated from the outside.

[0051] The first slider 21 is provided with compression springs on the upper and lower parts. When the lifting platform 13 descends to the connection and installation position of the permanent magnetic vacuum circuit breaker 14, the sleeve 29 of the lifting platform 13 presses the first slider 21 downward through the third spring 30. Since the elastic force of the second slider 23 is smaller than the elastic force of the third spring 30, when the lifting platform 13 descends, the second spring 24 is compressed first, and the flip cover 19 can be flipped open before the lifting platform 13 reaches the connection state. When the lifting platform 13 rises, the lifting platform 13 first rises to the disconnected position and then the flip cover 19 is buckled and closed.

[0052] To sum up, in the present invention, the busbar pool 25 and the main line pool 26 will be exposed to the outside world for a short time only during the lifting and lowering process of the lifting platform 13. During normal use, after the permanent magnetic vacuum circuit breaker 14 is docked, the busbar pool 25 and the main line pool 26 are isolated from the outside world through the first isolation sleeve 31 and the second isolation sleeve 32. When the present invention is not installed with the permanent magnetic vacuum circuit breaker 14 and is in a not-in-use state, the busbar pool 25 and the main line pool 26 are isolated from the outside world through the flip cover 19. This working mode minimizes the exposure of the busbar pool 25 and the main line pool 26 to the greatest extent, and reduces the volatilization of transformer oil.

[0053] Combined with Fig.12 , Attachment Fig.13 , Attachment Fig.14 Attached Fig.15 The inner walls on both sides of the cabinet 1 are hinged with multiple locking rods 34, the middle part of the locking rod 34 is hollow, and a fourth spring 35 is provided in the hollow part inside the locking rod 34 away from the hinge point with the cabinet 1. The fourth spring 35 is set as a tension spring, and its end is connected to the inner wall of the cabinet 1.

[0054] A synchronization rod 37 is fixedly connected between the locking rods 34 located on the same side of the cabinet body 1 , and a locking handle 36 is provided on the side of the locking rod 34 close to the explosion-proof cabinet door 2 .

[0055] Reference Fig.12 , Attachment Fig.13 , Attachment Fig.14 and attached Fig.15 When the locking handle 36 is in a vertical state, the locking rod 34 is not in contact with the top of the lifting platform 13, and the lifting platform 13 can be lifted and lowered freely. The fourth spring 35 stretches the locking rod 34 to be in this state.

[0056] When the locking handle 36 is in a horizontal state, the bottom of the locking rod 34 can contact the top of the lowered lifting platform 13, and the lifting platform 13 cannot be lifted or lowered freely. At the same time, the fourth spring 35 stretches the locking rod 34 to apply downward force, and the lifting platform 13 is continuously subjected to the downward pressure of the locking rod 34 and is in a locked state.

[0057] The surface of the explosion-proof cabinet door 2 facing the interior of the cabinet body 1 is provided with a plurality of buckles 6 that cooperate with the locking handle 36. The buckles 6 are arranged to cooperate with the position of the locking handle 36 when it is in a horizontal state. When the permanent magnetic vacuum circuit breaker 14 is installed in the present invention and the locking handle 36 is turned to a horizontal locking state, the locking handle 36 can be further locked to improve the stability of the locking.

[0058] Explosion-proof junction boxes 3 are provided on both sides of the busbar pool 25 and the main line pool 26. The three-phase wiring copper busbar 27 passes through the side walls of the busbar pool 25 and the main line pool 26 and extends to the interior of the explosion-proof junction box 3. The three-phase wiring copper busbar 27 passes through the side walls of the busbar pool 25 and the main line pool 26 and should be sealed and insulated.

[0059] When installing the permanent magnetic vacuum circuit breaker 14, the present invention connects the permanent magnetic vacuum circuit breaker 14 to be replaced with the transfer tooling 17 for installation, opens the explosion-proof cabinet door 2, ensures that the locking handle 36 is in a vertical state and unlocked, sends the permanent magnetic vacuum circuit breaker 14 into the lifting platform 13, rotates the lifting handwheel 12 to lower the lifting platform 13, and during this process, the flip cover 19 automatically flips upward, the lifting platform 13 continues to descend, the first isolation sleeve 31 and the second isolation sleeve 32 are connected to form a sealed isolation, the circuit breaker connector 28 is electrically connected to the permanent magnetic vacuum circuit breaker 14, and after the connection is in place, the locking handle 36 is pulled to a horizontal state to lock, and the explosion-proof cabinet door 2 is closed.

[0060] When removing the permanent magnetic vacuum circuit breaker 14, open the explosion-proof cabinet door 2, turn the locking handle 36 to the vertical state to unlock it, turn the lifting handwheel 12 to make the lifting platform 13 rise. During this process, the first isolation sleeve 31 and the second isolation sleeve 32 are disconnected, the circuit breaker connector 28 and the permanent magnetic vacuum circuit breaker 14 are electrically disconnected, and the flip cover 19 is flipped downward to snap into place. When the lifting platform 13 rises to the position to move out of the permanent magnetic vacuum circuit breaker 14, the disassembly is completed.

[0061] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by it, and does not deviate from the purpose of the invention, and does not creatively design a structure and implementation method similar to the technical solution, they should all fall within the protection scope of the present invention.

Claims

1. A mining explosion-proof permanent magnetic vacuum high-voltage power distribution device, comprising a cabinet (1), an isolation oil pool (7), a lifting platform (13) and a permanent magnetic vacuum circuit breaker (14), wherein the cabinet (1) is hollow, an explosion-proof cabinet door (2) is hingedly provided on one side, a plurality of vertically extending guide rods (8) are provided around the cabinet, the lifting platform (13) is slidably connected to the guide rods (8), the isolation oil pool (7) is provided at the center of the bottom of the cabinet (1), and the permanent magnetic vacuum circuit breaker (14) is slidably provided on the lifting platform (13), characterized in that: The isolation oil pool (7) is divided into a busbar pool (25) and a main line pool (26), the busbar pool (25) and the main line pool (26) are arranged side by side and isolated from each other, the busbar pool (25) and the main line pool (26) are both provided with a three-phase wiring copper bar (27), each phase of the three-phase wiring copper bar (27) is electrically connected to a circuit breaker connector (28), and the interface of the circuit breaker connector (28) is arranged upward; When the permanent magnetic vacuum circuit breaker (14) is slidably mounted on the lifting platform (13), its interface is maintained in a downwardly facing state, and each interface is slidably sleeved with a first isolation sleeve (31), and the circuit breaker joint (28) is fixedly sleeved with a second isolation sleeve (32). The first isolation sleeve (31) and the second isolation sleeve (32) are arranged in cooperation, and a sealed isolation is formed when the two are butted together. A first spring (33) is provided between the top of the first isolation sleeve (31) and the sliding sleeve joint of the permanent magnetic vacuum circuit breaker (14), and the first spring (33) is arranged as a compression spring. When the first isolation sleeve (31) and the second isolation sleeve (32) are butted together, a downward elastic force is generated, and the second isolation sleeve (32) sinks and is embedded in the top of the busbar pool (25) and the main line pool (26). Both sides of the busbar pool (25) and the main line pool (26) are hingedly provided with a flip cover plate (19), and the flip cover plate (19) is buckled to isolate the second isolation sleeve (32) from the external environment.

2. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 1, characterized in that: A transfer tool (17) is arranged outside the permanent magnetic vacuum circuit breaker (14), a plurality of rollers (18) are arranged on both sides of the transfer tool (17), and the lifting platform (13) is arranged in a U-shape, with first slide rails (15) matching the rollers (18) being arranged on the inner surfaces of both sides of the opening.

3. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 1, characterized in that: A first slider (21) is slidably arranged near the bottom of the guide rod (8), a second spring (24) is arranged at the bottom of the first slider (21), the second spring (24) is arranged as a compression spring, the bottom of which contacts the bottom surface of the cabinet (1), a second slide rail (22) is arranged on the side of the first slider (21), a second slider (23) is slidably arranged in the second slide rail (22), connecting rods (20) are arranged on both sides of the back of the flip cover (19), the ends of the connecting rods (20) extend to the sides of the first slider (21) and are hingedly connected to the second slider (23), and the connecting rods (20) are hingedly connected to the outer shell of the isolation oil pool (7) near the ends.

4. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 3 is characterized in that: The lifting platform (13) is provided with a plurality of sliding sleeves (29) that cooperate with the guide rods (8) on the outside. The sliding sleeves (29) are arranged above the first sliding block (21). A third spring (30) is arranged between the sliding sleeves (29) and the first sliding block (21). The elastic force of the second spring (24) is set to be smaller than the elastic force of the third spring (30).

5. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 1, characterized in that: The inner walls on both sides of the cabinet body (1) are hingedly provided with a plurality of locking rods (34), the middle of the locking rods (34) being hollow, and a fourth spring (35) being provided in the hollow part inside the locking rods (34) away from the hinge point of the cabinet body (1), the fourth spring (35) being arranged as a tension spring, the end of which is connected to the inner wall of the cabinet body (1).

6. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 5, characterized in that: A synchronization rod (37) is fixedly connected between the locking rods (34) located on the same side of the cabinet body (1), and a locking handle (36) is provided on the side of the locking rod (34) close to the explosion-proof cabinet door (2).

7. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 6, characterized in that: A plurality of buckles (6) that cooperate with the locking handle (36) are provided on the surface of the explosion-proof cabinet door (2) facing the interior of the cabinet body (1).

8. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 1, characterized in that: An explosion-proof junction box (3) is provided on both sides of the busbar pool (25) and the main line pool (26), and the three-phase connection copper bar (27) passes through the side walls of the busbar pool (25) and the main line pool (26) and extends into the interior of the explosion-proof junction box (3).

9. The explosion-proof permanent magnet vacuum high-voltage power distribution device for mining according to claim 1, characterized in that: A mounting frame (9) is fixedly provided on the top of the guide rod (8), and the mounting frame (9) is fixedly connected to a lifting power device (10). The two sides of the bottom of the lifting power device (10) are set as output ends, and the top center is set as an input end. The output end of the lifting power device (10) is provided with a lifting screw (11) for driving a lifting platform (13), and the input end of the lifting power device (10) is provided with a lifting hand wheel (12).

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