A mine flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device

Abstract

The present invention relates to the field of power distribution technology, and in particular to an explosion-proof and intrinsically safe permanent magnet high-voltage vacuum distribution device for mine use, which includes a chassis and an explosion-proof box body. The explosion-proof box body is fixedly connected to the top of the chassis. A dust removal box is fixedly connected inside the chassis. A condensation box is provided at the top of the dust removal box. At least one ventilation channel is connected between the dust removal box and the condensation box. A filter screen arranged in a meandering path is provided inside the dust removal box. The filter screen slidably penetrates through the ventilation channel. The filter screen is used to filter dust and debris in the air passing through the ventilation channel. A driving component for driving the filter screen to move along the meandering path and a cleaning component for cleaning the filter screen are also provided inside the dust removal box. The driving component drives the filter screen to continuously move, and a rotary brush is used to clean the moving filter screen, so as to keep the filter screen clean and unobstructed, thereby ensuring smooth air circulation and heat dissipation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and particularly to a mine explosion-proof and intrinsically safe permanent magnet high-voltage vacuum power distribution device. Background Art

[0002] In high-risk industries such as coal mines, metal mines, petroleum, and chemical industries, explosion-proof distribution cabinets, as key power distribution devices, their safety and stability are directly related to the safety and efficiency of production operations. Especially in environments with explosive gases or flammable and explosive dust, such as underground coal mines, extremely high requirements are imposed on the explosion-proof and intrinsically safe protection performance of power distribution equipment; after retrieval, a patent with the authorized announcement number CN215870501U discloses an explosion-proof permanent magnet high-voltage vacuum power distribution device with high safety, which realizes the air flow and heat dissipation inside the explosion-proof shell by designing a driving motor to drive the fan blades to rotate, effectively alleviating the problem of excessive internal temperature of the equipment, but still faces many challenges in practical applications.

[0003] First of all, the amount of dust in the mining area environment is relatively large. These dust particles are easily attached to the filter screen and gradually block the filter screen over time, affecting air circulation and heat dissipation effects. Secondly, although the explosion-proof shell of the power distribution device of this patent has good explosion-proof performance, in extreme cases, such as when an accidental deflagration occurs inside the explosion-proof shell for some reason, the heat dissipation slots on it may become channels for the flame to spread outward, easily triggering a larger fire or explosion. Summary of the Invention

[0004] In order to overcome the above-mentioned disadvantages of the prior art, the present invention provides a mine explosion-proof and intrinsically safe permanent magnet high-voltage vacuum power distribution device.

[0005] The technical solution is: a mine explosion-proof and intrinsically safe permanent magnet high-voltage vacuum power distribution device, including a chassis and an explosion-proof box body. The explosion-proof box body is fixedly connected to the top of the chassis. A dust removal box is fixedly connected inside the chassis. A condensation box is provided at the top of the dust removal box. At least one ventilation channel is connected between the dust removal box and the condensation box. A filter screen arranged in a meandering path is provided inside the dust removal box. The filter screen slidably penetrates through the ventilation channel. The filter screen is used to filter dust and debris in the air passing through the ventilation channel. A driving component for driving the filter screen to move along the meandering path and a cleaning component for cleaning the filter screen are also provided inside the dust removal box. At least one air inlet communicating with the top of the condensation box is opened at the bottom of the explosion-proof box body. An air outlet is opened at the top of the explosion-proof box body. A fan is installed in the air outlet. A plurality of baffles are slidably connected inside the explosion-proof box body. The positions of the plurality of baffles correspond to the air inlet and the air outlet respectively. An elastic member I is connected between the explosion-proof box body and the baffles. A ventilation gap is left between the baffle and the explosion-proof box body. When all the baffles move close to the explosion-proof box body, the air inlet and the air outlet can be closed.

[0006] As a preferred technical solution of the present invention, the driving assembly includes a motor, a toothed belt, and a roller. Four rollers are rotatably connected in a loop in the dust removal box. Two toothed belts are wound around the outer circumferences of all the rollers at intervals. The rollers have teeth matching the toothed belt. The filter screen is fixedly connected between the two toothed belts. A motor is installed on the top of the dust removal box, and the output shaft of the motor is connected to one of the rollers.

[0007] As a preferred technical solution of the present invention, the cleaning assembly includes a rotary brush. A set of rotary brushes are rotatably connected to the left and right sides of the inner top of the dust removal box. Each set of rotary brushes is symmetrically distributed on the inner and outer sides of the filter screen. A gear is fixedly connected to the upper part of the rotary brush. Y-shaped rods are slidably connected to the left and right sides of the inner top of the dust removal box. The Y-shaped rod has a U-shaped section. Both sides inside the U-shaped section of the Y-shaped rod have teeth matching the gear. When the Y-shaped rod moves linearly, it can drive the rotary brush to rotate to clean the filter screen.

[0008] As a preferred technical solution of the present invention, a sliding frame is fixedly connected to one end of the Y-shaped rod. Fixed rods are fixedly connected to the tops of two rollers not directly connected to the motor. The fixed rods are away from the axis of the rollers, and the top ends of the fixed rods are located inside the sliding frame. When the rollers rotate, the fixed rods move inside the sliding frame while rotating with the rollers, converting the rotational motion of the rollers into the linear motion of the Y-shaped rod.

[0009] As a preferred technical solution of the present invention, at least one pawl is fixedly connected to the baffle. A ratchet rack is slidably connected to the side of the explosion-proof box body beside the pawl. An elastic member II is connected between the explosion-proof box body and the ratchet rack. The teeth of the ratchet rack match the pawl. When the ratchet rack and the pawl are engaged, it can limit the movement of the baffle in the direction away from the explosion-proof box body.

[0010] As a preferred technical solution of the present invention, it further includes a water storage tank, a pump, and a spray pipe. A water storage tank is fixedly connected to the middle of the dust removal box. The top of the water storage tank communicates with the bottom of the condensation box. The water storage tank is used to receive the water condensed in the condensation box. A pump is installed beside the water storage tank. The water inlet end of the pump is connected to the water storage tank through a water delivery pipe. There are two spray pipes. One ends of the two spray pipes are respectively located above the two sets of rotary brushes. The other ends of the two spray pipes converge and are connected to the water outlet end of the pump.

[0011] As a preferred technical solution of the present invention, a liquid level sensor is provided in the water storage tank. The liquid level sensor is used to monitor the water level in the water storage tank for timely drainage.

[0012] As a preferred technical solution of the present invention, a collection box is fixedly connected to the bottom of the dust removal box. A sewage discharge port communicating with the collection box is opened at the bottom of the dust removal box.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The present invention drives the filter screen to move continuously through a driving component, and sweeps the moving filter screen with a roller brush to keep the filter screen clean and unobstructed, thereby ensuring smooth air circulation and heat dissipation effect. At the same time, by setting a condensation box to condense the air, not only the moisture in the air is effectively removed, but also the air temperature is reduced, thereby improving the heat dissipation efficiency and ensuring the safe and stable operation of the power distribution device in a harsh environment.

[0015] 2. The present invention adds baffles at the air inlet and outlet of the explosion-proof box body, and installs ratchet claws and ratchet racks on the baffles. Under normal circumstances, the baffles do not affect air circulation; but in the event of deflagration, the baffles quickly move close to the explosion-proof box body under the action of the explosion shock wave, closing the air inlet and outlet, effectively preventing the propagation of flames and shock waves, enhancing the flameproof performance of the power distribution device, and the interaction between the ratchet claws and ratchet racks further ensures the stability of the baffles in the closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic sectional view of the dust removal box of the present invention.

[0018] Figure 3 It is a schematic diagram of the installation structure of the driving component and the filter screen of the present invention.

[0019] Figure 4 It is a schematic diagram of the installation structure of the cleaning component of the present invention.

[0020] Figure 5 It is a schematic diagram of the installation structure of the Y-shaped rod, the sliding frame and the fixed rod of the present invention.

[0021] Figure 6 It is a schematic sectional view of the water storage tank of the present invention.

[0022] Figure 7 It is a schematic sectional view of the explosion-proof box body of the present invention.

[0023] Figure 8 It is a schematic diagram of the partial structure of the ratchet claw and the ratchet rack of the present invention.

[0024] The labels in the figure are: 1 - chassis, 2 - explosion-proof box body, 201 - air inlet, 202 - air outlet, 3 - dust removal box, 301 - sewage outlet, 4 - condensation box, 5 - ventilation channel, 6 - filter screen, 701 - motor, 702 - toothed belt, 703 - roller, 801 - rotary brush, 802 - gear, 803 - Y-shaped rod, 901 - sliding frame, 902 - fixing rod, 10 - fan, 11 - baffle plate, 12 - first elastic member, 13 - pawl, 14 - ratchet rack, 141 - second elastic member, 15 - water storage tank, 16 - pump, 17 - spray pipe, 18 - liquid level sensor, 19 - collection box. Detailed implementation manners

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] Therefore, a feature pointed out in this specification will be used to illustrate one of the features of one embodiment of the present invention, rather than implying that each embodiment of the present invention must have the illustrated feature. In addition, it should be noted that this specification describes many features. Although some features may be combined to show possible system designs, these features can also be used in other combinations not explicitly described. Therefore, unless otherwise stated, the illustrated combinations are not intended to be limiting.

[0027] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0029] The principle and structure of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but it is not a limitation to the present invention.

[0030] Please refer to Figure 1, a mining flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device, including a chassis 1 and an explosion-proof box body 2. The explosion-proof box body 2 is fixedly connected to the top of the chassis 1. The distribution device body is located inside the explosion-proof box body 2. A controller is provided on the left side of the explosion-proof box body 2. The explosion-proof box body 2 serves as the main flameproof component of this distribution device. There are no specific technical requirements for the specific structural form of the explosion-proof box body 2 in the present invention. Please refer to Figure 1 and Figure 2 , a dust removal box 3 is fixedly connected inside the chassis 1. A condensation box 4 is provided between the top of the dust removal box 3 and the bottom of the explosion-proof box body 2. A condensation device is provided inside the condensation box 4. Two ventilation channels 5 are connected between the dust removal box 3 and the condensation box 4. The two ventilation channels 5 are arranged front and back. Part of the ventilation channel 5 is located inside the dust removal box 3. After the external air enters the condensation box 4 through the ventilation channel 5, the water vapor in the air can be condensed into liquid water by the condensation device, and at the same time, the temperature of the air will be reduced. A filter screen 6 arranged in a loop path is provided inside the dust removal box 3. The front and rear sections of the loop filter screen 6 respectively slide through the two ventilation channels 5. The air passing through the ventilation channel 5 will be filtered by the filter screen 6 to remove the dust and debris mixed in it. A driving component for driving the filter screen 6 to move along the loop path and a cleaning component for cleaning the filter screen 6 are also provided inside the dust removal box 3. The cleaning component can clean the filter screen 6 during the movement of the filter screen 6, so that the filter screen 6 can be cleaned in time after filtering the impurities in the air to ensure the filtering effect of the filter screen 6 and the smooth flow of air. Please refer to Figure 7 and Figure 8 , two air inlets 201 communicating with the top of the condensation box 4 are opened on the left and right sides at the bottom of the explosion-proof box body 2. An air outlet 202 is opened on the top of the explosion-proof box body 2. A fan 10 is installed in the air outlet 202. The fan 10 is used to discharge the air inside the explosion-proof box body 2, and at the same time, a negative pressure is formed inside the explosion-proof box body 2, so that the air after condensation treatment in the condensation box 4 enters the explosion-proof box body 2 through the air inlet 201. In this way, an air circulation flow is formed inside the explosion-proof box body 2. The air can absorb the heat generated by the distribution device body during the flowing process. Three baffles 11 are slidably connected inside the explosion-proof box body 2. The positions of the three baffles 11 correspond to the two air inlets 201 and the air outlet 202 respectively. An elastic member 12 is connected between the explosion-proof box body 2 and the baffle 11. When this distribution device is working normally, there is a ventilation gap between the baffle 11 and the explosion-proof box body 2 under the elastic action of the elastic member 12. When an accidental explosion occurs inside the explosion-proof box body 2, all the baffles 11 quickly move close to the explosion-proof box body 2 under the action of the explosion shock wave, closing the air inlets 201 and the air outlet 202 to prevent the flame and shock wave from spreading outward.

[0031] Please refer to Figure 3, The driving component includes a motor 701, a toothed belt 702 and a roller 703. Four rollers 703 are rotatably connected to the inner bottom of the dust removal box 3 in a rectangular layout. Two toothed belts 702 are wound around the outer peripheries of all the rollers 703 at intervals. The roller 703 has teeth matching the toothed belt 702. The filter screen 6 is fixedly connected between the two toothed belts 702. A motor 701 is installed on the top of the dust removal box 3. The top end of one of the rollers 703 is connected to the output shaft of the motor 701, and there is a gap between the top ends of the remaining rollers 703 and the inner top of the dust removal box 3. Among them, when the motor 701 drives the roller 703 connected to it to rotate, since the roller 703 is provided with teeth matching the toothed belt 702, when the roller 703 rotates, it will drive the two toothed belts 702 engaged with it to move synchronously. At the same time, under the driving action of the toothed belt 702, the remaining three rollers 703 are driven to rotate synchronously, and the filter screen 6 moves continuously along a rectangular path with the movement of the toothed belt 702.

[0032] Please refer to Figure 4 and Figure 5 , The cleaning component includes a rotary brush 801. A set of rotary brushes 801 are rotatably connected to the left and right sides of the inner top of the dust removal box 3. Each set of rotary brushes 801 is symmetrically distributed on both the inner and outer sides of the filter screen 6. A gear 802 is fixedly connected to the upper part of the rotary brush 801. Y-shaped rods 803 are slidably connected to the left and right sides of the inner top of the dust removal box 3. The Y-shaped rod 803 has a U-shaped section. Both sides inside the U-shaped section of the Y-shaped rod 803 have teeth matching the gear 802. When the Y-shaped rod 803 moves linearly, it can drive the rotary brush 801 to rotate. The bristles of the rotary brush 801 are in close contact with the surface of the filter screen 6, effectively sweeping off the dust and debris accumulated on the filter screen 6.

[0033] Please refer to Figure 4 and Figure 5 , One end of the Y-shaped rod 803 is fixedly connected with a sliding frame 901. Fixed rods 902 are fixedly connected to the tops of the two rollers 703 not directly connected to the motor 701. The fixed rods 902 are away from the axis of the rollers 703. The top ends of the fixed rods 902 are located inside the sliding frame 901. When the roller 703 rotates, the fixed rod 902 moves inside the sliding frame 901 while rotating with the roller 703. Specifically, the top end of the fixed rod 902 makes relative sliding and relative rotation inside the sliding frame 901, converting the rotational motion of the roller 703 into the linear motion of the Y-shaped rod 803.

[0034] Please refer to Figure 7 and Figure 8 , A pawl 13 is fixedly connected to both the front and rear sides of the baffle 11. There is a fixed block beside each pawl 13 on the explosion-proof box body 2. The fixed block is connected with a ratchet rack 14 through two second elastic members 141. The teeth of the ratchet rack 14 match the pawl 13. When the ratchet rack 14 meshes with the pawl 13, it can limit the movement of the baffle 11 in the direction away from the explosion-proof box body 2.

[0035] Please refer to Figure 2 、 Figure 4 and Figure 6 , and also includes a water storage tank 15, a pump 16 and a spray pipe 17. A water storage tank 15 is fixedly connected to the middle part inside the dust removal box 3. The top of the water storage tank 15 communicates with the bottom of the condensation box 4. The water storage tank 15 is used to receive the water condensed in the condensation box 4. A pump 16 is installed beside the water storage tank 15. The pump 16 is electrically connected to the controller. The water inlet end of the pump 16 is connected to the water storage tank 15 through a water delivery pipe. There are two spray pipes 17. One ends of the two spray pipes 17 are respectively located above the two groups of brush rollers 801. The other ends of the two spray pipes 17 converge and are connected to the water outlet end of the pump 16. When the controller starts the pump 16 to work, the pump 16 pumps the water in the water storage tank 15 to the spray pipe 17, and the spray pipe 17 sprays the water downward from above the brush roller 801, providing additional cleaning assistance for the brush roller 801.

[0036] Please refer to Figure 6 , a liquid level sensor 18 is provided inside the water storage tank 15. The liquid level sensor 18 is electrically connected to the controller. The liquid level sensor 18 is used to monitor the water level in the water storage tank 15. The liquid level sensor 18 monitors the liquid level in the water storage tank 15 in real time. When the liquid level reaches the preset full water threshold, the liquid level sensor 18 sends a signal to the controller. After receiving the signal, the controller starts the pump 16 to work.

[0037] Please refer to Figure 1 and Figure 2 , a collection box 19 is fixedly connected to the bottom of the dust removal box 3. A sewage discharge port 301 communicating with the collection box 19 is opened at the bottom of the dust removal box 3. During the cleaning process of the filter screen 6, the dust and sundries swept off by the brush roller 801 and the sewage after being sprayed and washed by the spray pipe 17 all enter the collection box 19 through the sewage discharge port 301 for centralized collection, which is convenient for subsequent unified treatment.

[0038] The working principle of the present invention is as follows: During use, the hot air inside the explosion-proof box 2 is discharged outward through the air outlet 202 by the operation of the fan 10. This action generates a negative pressure effect inside the explosion-proof box 2, prompting external air to enter the dust removal box 3 through the ventilation channel 5. The air entering the dust removal box 3 is first filtered by the filter net 6 to remove dust and debris therein. Subsequently, the cleaned air continues to flow into the condensation box 4, where the condensation device in the condensation box 4 condenses the water vapor in the air into liquid water. These condensed waters drip downward under the action of gravity and are centrally collected in the water storage tank 15. The air after condensation and drying enters the explosion-proof box 2 through the air inlet 201. Since the condensation process not only removes the moisture in the air but also further reduces the temperature of the air, the relatively low-temperature air naturally absorbs the heat generated during the operation of the power distribution device during the upward flow process and is discharged to the outside through the fan 10, forming a complete air circulation system. This process repeats continuously, enabling more efficient heat dissipation of the power distribution device and avoiding performance degradation or failures caused by overheating.

[0039] To maintain the continuous and efficient filtering ability of the filter net 6, the roller 703 connected thereto is driven to rotate by the motor 701. Since the roller 703 is provided with teeth matching the toothed belt 702, when the roller 703 rotates, it will drive the two toothed belts 702 engaged therewith to move synchronously. At the same time, under the driving action of the toothed belt 702, the other three rollers 703 are driven to rotate synchronously. The filter net 6 moves continuously along a meandering path as the toothed belt 702 moves. During the movement of the filter net 6, it will successively pass through the ventilation channel 5 and the area where the rotary brush 801 is located. When the filter net 6 moves to contact the rotary brush 801 after passing through the ventilation channel 5, at this time, the fixed rod 902 moves within the sliding frame 901 while rotating with the roller 703 connected thereto, thereby converting the rotational motion of the roller 703 into the linear motion of the Y-shaped rod 803. Since the Y-shaped rod 803 is provided with teeth matching the gear 802 of the rotary brush 801, the linear movement of the Y-shaped rod 803 will drive the gear 802 on the rotary brush 801 to rotate, and further cause the rotary brush 801 to rotate. The bristles of the rotary brush 801 are in close contact with the surface of the filter net 6, effectively sweeping off the dust and debris accumulated on the filter net 6. The cleaned filter net 6 moves back into the ventilation channel 5 to contact the external air again and continues to filter dust and debris. In this way, it can be ensured that the filter net 6 remains continuously unobstructed and has filtering ability.

[0040] The liquid level in the water tank 15 is monitored in real time by the liquid level sensor 18. When the liquid level reaches the preset full water threshold, the liquid level sensor 18 sends a signal to the controller. After receiving the signal, the controller starts the pump 16 to pump the water in the water tank 15 to the nozzle 17 through the pump 16. The nozzle 17 sprays water downward from the top of the roller brush 801, providing additional cleaning assistance for the roller brush 801, effectively flushing away the stubborn dirt on the filter 6, and preventing dust from flying during the cleaning process. At the same time, the dust and debris swept off by the roller brush 801, and the sewage after being sprayed by the nozzle 17 are all collected in the collection box 19 through the sewage outlet 301, which is convenient for subsequent unified treatment.

[0041] When an explosion unexpectedly occurs inside the explosion-proof box 2, the baffle 11 quickly moves close to the explosion-proof box 2 under the action of the explosion shock wave, closing the air inlet 201 and the air outlet 202, effectively preventing the spread of flames and shock waves, and enhancing the explosion-proof performance of the distribution device. During this process, the elastic member 12 will be compressed to absorb part of the impact force, and the inclined surface of the pawl 13 will contact the inclined surface of the ratchet bar 14 and slide along the tooth shape of the ratchet bar 14. Since the design of the pawl 13 has a one-way locking function (that is, it can only slide and lock in one direction, and an external force is required to unlock in the opposite direction), the pawl 13 will push the ratchet bar 14 to slide on the explosion-proof box 2 during the sliding process, and the elastic member 141 provides a reset force for the ratchet bar 14, and finally the baffle When the baffle 11 stops moving, the pawl 13 is firmly meshed with a tooth on the ratchet bar 14. At this time, the interaction between the pawl 13 and the ratchet bar 14 limits the movement of the baffle 11 in the direction away from the explosion-proof box body 2, thereby ensuring the reliability of the closed state of the air inlet 201 and the air outlet 202. When it is necessary to release the baffle 11 from closing the air inlet 201 and the air outlet 202, it is only necessary to slide the ratchet bar 14 to the side away from the pawl 13 to disengage the pawl 13 from the ratchet bar 14. At this time, the baffle 11 will move away from the explosion-proof box body 2 under the elastic action of the elastic member 12, and reopen the air inlet 201 and the air outlet 202. At the same time, the elastic member 141 will continue to provide a reset force for the ratchet bar 14.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A mining flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device, comprising a chassis (1) and an explosion-proof box body (2), wherein the explosion-proof box body (2) is fixedly connected to the top of the chassis (1), and is characterized in that, The chassis (1) is internally fixedly connected with a dust removal box (3). A condensation box (4) is arranged at the top of the dust removal box (3). At least one ventilation channel (5) is connected between the dust removal box (3) and the condensation box (4). A filter screen (6) arranged in a loop path is arranged in the dust removal box (3). The filter screen (6) slidably penetrates through the ventilation channel (5). The filter screen (6) is used for filtering dust and sundries in the air passing through the ventilation channel (5). A driving component for driving the filter screen (6) to move along the loop path and a cleaning component for cleaning the filter screen (6) are further arranged in the dust removal box (3). At least one air inlet (201) communicating with the top of the condensation box (4) is opened at the bottom of the explosion-proof box body (2). An air outlet (202) is opened at the top of the explosion-proof box body (2). A fan (10) is installed in the air outlet (202). A plurality of baffles (11) are slidably connected in the explosion-proof box body (2). The positions of the plurality of baffles (11) correspond to the air inlet (201) and the air outlet (202) respectively. An elastic member I (12) is connected between the explosion-proof box body (2) and the baffle (11). A ventilation gap is left between the baffle (11) and the explosion-proof box body (2). When all the baffles (11) move close to the explosion-proof box body (2), the air inlet (201) and the air outlet (202) can be closed; The driving component includes a motor (701), a toothed belt (702) and a roller (703). Four rollers (703) are rotatably connected in the dust removal box (3) in a loop arrangement. The two toothed belts (702) are wound around the outer peripheries of all the rollers (703) at intervals. The roller (703) has teeth matching the toothed belt (702). The filter screen (6) is fixedly connected between the two toothed belts (702). The motor (701) is installed at the top of the dust removal box (3). The output shaft of the motor (701) is connected to one of the rollers (703); The cleaning component includes a rotary brush (801). A group of the rotary brushes (801) are rotatably connected to the left and right sides of the inner top of the dust removal box (3). Each group of the rotary brushes (801) is symmetrically distributed on the inner and outer sides of the filter screen (6). A gear (802) is fixedly connected to the upper part of the rotary brush (801). Y-shaped rods (803) are slidably connected to the left and right sides of the inner top of the dust removal box (3). The Y-shaped rod (803) has a U-shaped section. Both sides inside the U-shaped section of the Y-shaped rod (803) have teeth matching the gear (802). When the Y-shaped rod (803) moves linearly, the rotary brush (801) can be driven to rotate to clean the filter screen (6); One end of the Y-shaped rod (803) is fixedly connected with a sliding frame (901). Fixed rods (902) are fixedly connected to the tops of the two rollers (703) not directly connected to the motor (701). The fixed rods (902) are away from the axes of the rollers (703). The tops of the fixed rods (902) are located inside the sliding frame (901). When the rollers (703) rotate, the fixed rods (902) rotate with the rollers (703) and move inside the sliding frame (901) at the same time, converting the rotational motion of the rollers (703) into the linear motion of the Y-shaped rod (803).

2. The mining flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device according to claim 1, characterized in that, At least one pawl (13) is fixedly connected to the baffle (11). A ratchet rack (14) is slidably connected to the explosion-proof box body (2) beside the pawl (13). An elastic member II (141) is connected between the explosion-proof box body (2) and the ratchet rack (14). The teeth of the ratchet rack (14) match the pawl (13). When the ratchet rack (14) meshes with the pawl (13), it can limit the movement of the baffle (11) in the direction away from the explosion-proof box body (2).

3. The mine flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device according to claim 2, wherein, It further includes a water storage tank (15), a pump (16) and a spray pipe (17). The water storage tank (15) is fixedly connected to the middle part inside the dust removal box (3). The top of the water storage tank (15) communicates with the bottom of the condensation box (4). The water storage tank (15) is used to receive the water condensed in the condensation box (4). The pump (16) is installed beside the water storage tank (15). The water inlet end of the pump (16) is connected to the water storage tank (15) through a water delivery pipe. There are two spray pipes (17). One ends of the two spray pipes (17) are respectively located above the two groups of brush rollers (801). The other ends of the two spray pipes (17) converge and are connected to the water outlet end of the pump (16).

4. The mining flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device according to claim 3, characterized in that, A liquid level sensor (18) is arranged inside the water storage tank (15). The liquid level sensor (18) is used to monitor the water level inside the water storage tank (15) for timely drainage.

5. A mine flameproof and intrinsically safe permanent magnet high-voltage vacuum distribution device according to claim 4, characterized in that, A collection box (19) is fixedly connected to the bottom of the dust removal box (3). A sewage discharge port (301) communicating with the collection box (19) is opened at the bottom of the dust removal box (3).

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