An explosion-proof switch device for underground coal mines

Abstract

The present invention relates to the technical field of explosion-proof switches for coal mines, and specifically to an explosion-proof switch device for underground coal mines, comprising an explosion-proof box and a liquid cooling system, wherein the liquid cooling system is composed of a cooling pipe, a circulating pump, a radiator, etc. forming a coolant circulation path. In addition, a monitoring mechanism, an efficiency-enhancing mechanism, and a cleaning mechanism are also provided. The efficiency-enhancing mechanism comprises an air inlet box, an air outlet box, a bearing bracket, a supporting outer tube, a supporting inner tube, a connecting pipe, a filter plate, a slag storage box, an end cover, a liquid inlet, a sealing ring, an air inlet, a wind hood, and a guide box, etc., which utilizes the cavity to supply air to assist in cooling the coolant. The cleaning output end of the cleaning mechanism cleans impurities from the filter plate, and the transport output end delivers the impurities to the slag storage box. The connecting pipe connects the supporting inner tube and the coolant input pipe. The overall device has a reasonable structure, which can effectively improve the heat dissipation efficiency of the explosion-proof switch device, ensure its stable operation, and realize the automatic slag cleaning function.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine explosion-proof switches, in particular to an underground coal mine explosion-proof switch device. Background Art

[0002] The water-cooled explosion-proof inverter is a power control device used in explosive environments. It combines water-cooling technology and explosion-proof design to ensure safe and reliable operation in flammable and explosive places. The water-cooling method has high heat dissipation efficiency and can quickly and effectively remove the large amount of heat generated by the inverter, preventing the inverter from degrading performance or malfunctioning due to overheating, and ensuring its stable operation under high load and long-term operating conditions.

[0003] However, water-cooled explosion-proof inverters are subject to water source and water quality constraints. Impurities inside the equipment need to be cleaned regularly. In addition, when the ambient temperature rises, the coolant will increase in temperature to a certain extent as the ambient temperature changes. Therefore, it is necessary to design a new type of equipment that can automatically clean impurities and has an efficient cooling function to solve the above problems. Summary of the Invention

[0004] Based on this, it is necessary to provide an explosion-proof switch device for underground coal mines in response to the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is: an explosion-proof switch device in a coal mine, including an explosion-proof box and a liquid cooling system, the liquid cooling system including a cooling pipe, a circulation pump and a radiator, and also including a monitoring mechanism, an efficiency-enhancing mechanism, a cleaning mechanism and a coolant inlet pipe and a coolant return pipe fixedly arranged on the explosion-proof box. The coolant inlet pipe, the cooling pipe and the coolant return pipe constitute a coolant circulation passage, the monitoring mechanism has a monitoring output end for monitoring the temperature in the explosion-proof box, the monitoring output end is connected to the efficiency-enhancing mechanism, the efficiency-enhancing mechanism includes two air inlet boxes fixedly arranged on both sides of the coolant inlet pipe in a symmetrical state, an air outlet box fixedly arranged next to the coolant return pipe, a supporting bracket fixedly arranged on the side wall of the explosion-proof box, a supporting outer tube coaxial with the coolant inlet pipe and fixedly connected to the supporting bracket, a supporting inner tube coaxially arranged in the supporting outer tube, and a supporting inner tube fixedly arranged with the cooling liquid inlet pipe. A connecting pipe is coaxially arranged with the coolant inlet pipe, a filter plate is coaxially fixedly arranged in the supporting inner pipe, a slag storage box is fixedly arranged on the side wall of the supporting outer pipe, an end cover is fixedly arranged at the port of the supporting inner pipe, several liquid inlets are annularly opened on the end cover, a sealing ring is coaxial with the end cover and fixedly connected to the supporting outer pipe, an air inlet is opened on the sealing ring, a wind hood is coaxially fixedly arranged on the end of the supporting outer pipe away from the sealing ring, and two guide boxes are symmetrically fixed on the wind hood, one end of the guide box is connected to the air inlet box and the other end is connected to the wind hood, the cavity between the inner wall of the supporting outer pipe and the outer wall of the supporting inner pipe is used for air to pass through, the two ends of the connecting pipe are respectively connected to the supporting inner pipe and the coolant inlet pipe, and the cleaning mechanism includes a cleaning output end and a transport output end, the cleaning output end is used to clean impurities on the filter plate, and the transport output end is used to transport the cleaned impurities to the slag storage box.

[0006] Furthermore, a spiral support plate is fixedly provided on the inner wall of the supporting outer tube, and the spiral support plate is fixedly connected to the outer wall of the supporting inner tube. The spiral support plate divides the cavity between the supporting outer tube and the supporting inner tube into a spiral airway.

[0007] Furthermore, one end of the connecting pipe is rotatably connected to the coolant inlet pipe, and the other end is rotatably connected to the supporting inner pipe. A booster impeller is coaxially fixed on the outer wall of the connecting pipe, a support frame is coaxially fixed on the inner wall of the connecting pipe, and a power impeller is coaxially fixed on the support frame. The two ends of the connecting pipe are respectively connected to the coolant inlet pipe and the supporting inner pipe in a dynamic seal.

[0008] Furthermore, the cleaning structure includes a limiting boss formed at the center of the filter plate, a receiving tube seat rotatably set on the limiting boss, a conveying pipe coaxially fixed on the end cover, a slag outlet opened at the end of the conveying pipe away from the receiving tube seat, a containing tube fixedly set on the side wall of the receiving tube seat, a slag inlet opened on the containing tube, a scraper plate arranged at the slag inlet and fixedly connected to the containing tube, a bearing shaft coaxially rotatably set in the conveying pipe, a slag conveying spiral blade coaxially fixed on the bearing shaft and a driving motor fixedly set on the side wall of the supporting outer tube, the output shaft of the driving motor is connected to the bearing shaft through a pulley, the slag outlet is connected to the slag storage box, the end of the conveying pipe close to the receiving tube seat is rotatably connected to the receiving tube seat, and the end of the bearing shaft close to the receiving tube seat is fixedly connected to the receiving tube seat.

[0009] Furthermore, the slag conveying spiral blade is the conveying output end of the cleaning mechanism, and the slag scraper is the cleaning output end of the cleaning mechanism.

[0010] Furthermore, the monitoring mechanism includes a storage cylinder fixedly arranged on the side wall of the explosion-proof box, a mounting support plate arranged beside the storage cylinder and fixedly connected to the explosion-proof box, a piston rod coaxially slidably arranged in the storage cylinder, a limit column fixedly arranged on the mounting support plate, a connecting rod rotatably arranged on the limit column, and a first sliding rheostat and a second sliding rheostat fixedly arranged on the mounting support plate. Both ends of the connecting rod are provided with waist grooves, the slide of the first sliding rheostat is slidably connected to the waist groove at one end of the connecting rod, and the slide of the second sliding rheostat is slidably connected to the waist groove at the other end of the connecting rod. One end of the connecting rod is hinged to the slide of the first sliding rheostat, and the other end is hinged to the slide of the second sliding rheostat. The end of the piston rod away from the storage cylinder is hinged to the slide of the first sliding rheostat. The first sliding rheostat is electrically connected to the drive motor, and the second sliding rheostat is electrically connected to the circulation pump. Expansion medium is stored in the storage cylinder.

[0011] Furthermore, the piston rod is the monitoring output end of the monitoring mechanism.

[0012] Furthermore, the cleaning mechanism also includes a transmission rod coaxially rotatably arranged in the accommodating tube, a slag transporting spiral blade coaxially fixed on the transmission rod, a transmission gear coaxially fixed on the end of the transmission rod, and a transmission gear ring coaxially fixed on the inner wall of the supporting inner tube, and the transmission gear is meshed with the transmission gear ring.

[0013] Furthermore, a plurality of one-way water filtering holes are provided on the walls of the receiving pipe and the delivery pipe.

[0014] Furthermore, the cleaning mechanism also includes a slag unloading box fixedly arranged at the slag outlet, a vibrating box slidingly connected to the slag unloading box, a connecting box fixedly arranged on the slag storage box, a touch protrusion fixedly arranged on the vibrating box, a return spring arranged on the connecting box and a cam coaxially fixed on the load-bearing shaft. The connecting box is slidingly connected to the vibrating box, the touch protrusion contacts the cam, one end of the return spring is connected to the vibrating box, and the other end is connected to the connecting box.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, the coolant flows through the cooling pipes within the explosion-proof box to achieve heat exchange and cooling. Simultaneously, an external blower sends cooled air into the explosion-proof box to assist in cooling, significantly improving cooling efficiency. In particular, the spiral air duct extends the heat exchange time between the air and the coolant, allowing the air to fully cool, enhancing the cooling effect of the equipment and effectively ensuring the stable operation of explosion-proof switchgear in underground coal mines in high-temperature environments.

[0017] Second, the cleaning mechanism automatically removes impurities from the filter plates and transports them to the slag storage box, ensuring a consistently high filter plate pass rate and preventing clogging. This not only extends the life of the equipment but also reduces malfunctions and repair costs caused by filter plate clogging, ensuring stable and reliable operation.

[0018] Third, the monitoring mechanism automatically adjusts the operating conditions of the circulation pump and drive motor based on temperature fluctuations within the explosion-proof chamber. When the temperature rises, the coolant flow rate is increased to enhance cooling, while the drive motor speed is reduced to prevent equipment damage. Normal operation resumes when the temperature returns to normal. This intelligent adjustment function enables precise temperature control, improves energy efficiency, and ensures safe equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the embodiment;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure at center A;

[0021] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at point B in the middle;

[0022] Figure 4 2. It is a schematic diagram of the three-dimensional structure of the air outlet box of the embodiment;

[0023] Figure 5 This is a sectional view of the three-dimensional structure of the supporting inner tube of the embodiment;

[0024] Figure 6is a cross-sectional view of the supporting inner tube of the embodiment;

[0025] Figure 7 is a schematic diagram of the three-dimensional structure of the embodiment without the supporting outer tube;

[0026] Figure 8 3D schematic diagram of the filter plate and the delivery pipe of the embodiment;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the filter plate of the embodiment;

[0028] Figure 10 It is a schematic diagram of the exploded three-dimensional structure of the containing tube of the embodiment.

[0029] The numbers in the figure are: 1. explosion-proof box; 2. coolant inlet pipe; 3. coolant return pipe; 4. air outlet box; 5. air inlet box; 6. bearing bracket; 7. supporting outer pipe; 8. spiral support plate; 9. spiral air duct; 10. supporting inner pipe; 11. connecting pipe; 12. support frame; 13. power impeller; 14. power impeller; 15. filter plate; 16. limiting boss; 17. receiving pipe seat; 18. receiving pipe; 19. one-way water filter hole; 20. transmission rod; 21. slag transport spiral blade; 22. transmission gear; 23. slag inlet; 24. slag scraper; 25. transmission Gear ring; 26. End cover; 27. Liquid inlet; 28. Delivery pipe; 29. ​​Bearing shaft; 30. Slag delivery spiral blade; 31. Cam; 32. Slag outlet; 33. Slag unloading box; 34. Vibration box; 35. Touching bump; 36. Air hood; 37. Diversion box; 38. Slag storage box; 39. Connecting box; 40. Return spring; 41. Drive motor; 42. Sealing ring; 43. Air inlet; 44. Storage cylinder; 45. Piston rod; 46. Mounting support plate; 47. First sliding rheostat; 48. Second sliding rheostat; 49. Limiting column; 50. Connecting rod. DETAILED DESCRIPTION

[0030] In order to further understand the features, technical means, specific objectives and functions achieved by the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] refer to Figures 1 to 10 :

[0032] A coal mine underground explosion-proof switch device, including an explosion-proof box 1 and a liquid cooling system, the liquid cooling system includes a cooling pipe, a circulation pump and a radiator, and also includes a monitoring mechanism, an efficiency enhancement mechanism, a cleaning mechanism and a coolant input pipe 2 and a coolant return pipe 3 fixedly arranged on the explosion-proof box 1. The coolant input pipe 2, the cooling pipe and the coolant return pipe 3 constitute a coolant circulation path. The monitoring mechanism has a monitoring output end for monitoring the temperature in the explosion-proof box 1, and the monitoring output end is connected to the efficiency enhancement mechanism. The efficiency enhancement mechanism includes two air inlet boxes 5 fixedly arranged on both sides of the coolant input pipe 2 in a symmetrical state, and an air outlet box 5 fixedly arranged next to the coolant return pipe 3. Box 4, a supporting bracket 6 fixedly arranged on the side wall of the explosion-proof box 1, a supporting outer tube 7 coaxial with the coolant inlet pipe 2 and fixedly connected to the supporting bracket 6, a supporting inner tube 10 coaxially arranged in the supporting outer tube 7, a connecting pipe 11 coaxially arranged with the coolant inlet pipe 2, a filter plate 15 coaxially fixedly arranged in the supporting inner tube 10, a slag storage box 38 fixedly arranged on the side wall of the supporting outer tube 7, an end cover 26 fixedly arranged at the port of the supporting inner tube 10, a plurality of liquid inlets 27 annularly opened on the end cover 26, a sealing ring 42 coaxial with the end cover 26 and fixedly connected to the supporting outer tube 7, and an air inlet 43 (such as Figure 6 As shown), the wind shield 36 coaxially fixedly arranged on the end of the supporting outer tube 7 away from the sealing ring 42 and two symmetrically fixed guide boxes 37 (combined with Figure 1 and Figure 6 ), one end of the guide box 37 is connected to the air inlet box 5 and the other end is connected to the wind cover 36, the cavity between the inner wall of the supporting outer tube 7 and the outer wall of the supporting inner tube 10 is used for air to pass through, and the two ends of the connecting pipe 11 are respectively connected to the supporting inner tube 10 and the coolant input pipe 2, and the cleaning mechanism includes a cleaning output end and a transport output end, the cleaning output end is used to clean impurities on the filter plate 15, and the transport output end is used to transport the cleaned impurities to the slag storage box 38.

[0033] It should be noted that the liquid cooling system is a mature existing technology and will not be described in detail here. In addition, an external blowing device is connected to the air inlet 43. When the equipment is running, the monitoring output end of the monitoring mechanism will always monitor the temperature inside the explosion-proof box 1, and then the monitoring output end will drive the efficiency enhancement mechanism to operate. The coolant first enters the supporting inner tube 10 through the liquid inlet 27, then passes through the filter plate 15 and the connecting tube 11, and finally enters the explosion-proof box 1 through the coolant input pipe 2, and finally returns to the radiator through the coolant return pipe 3. When the coolant flows in the cooling pipe inside the explosion-proof box 1, it takes away the heat inside the explosion-proof box 1 under the action of heat exchange. When the efficiency enhancement mechanism is running, the coolant flows in the supporting inner tube 10, and the external blowing device sends wind from the air inlet 43 into the cavity between the supporting inner tube 10 and the supporting outer tube 7. At this time, the air in the cavity will first exchange heat with the coolant in the supporting inner tube 10, and the coolant will reduce the air temperature in the cavity, and the air in the cavity will also form an insulation layer for the coolant in the supporting inner tube 10. The cooled air then passes through the wind hood 36, the guide box 37 and the air inlet box 5 and finally enters the explosion-proof box 1, and is finally discharged from the air outlet box 4, thereby assisting the coolant in the cooling pipe to synchronously cool the explosion-proof box 1 and improve the cooling efficiency. In addition, during the operation of the equipment, the cleaning output end of the cleaning mechanism cleans the impurities on the filter plate 15, and then transports them to the slag storage box 38 by the transport output end, ensuring that the filter plate 15 always has a good pass rate, preventing the filter plate 15 from being blocked, causing damage to the equipment, and extending the service life of the equipment.

[0034] In order to ensure that the gas can more thoroughly exchange heat with the coolant supporting the inner tube 10 when the device is in operation, the following features are also provided:

[0035] A spiral support plate 8 is fixedly provided on the inner wall of the supporting outer tube 7 , and the spiral support plate 8 is fixedly connected to the outer wall of the supporting inner tube 10 . The spiral support plate 8 divides the cavity between the supporting outer tube 7 and the supporting inner tube 10 into a spiral airway 9 .

[0036] The setting of the spiral air channel 9 can slow down the flow speed of air between the supporting inner tube 10 and the supporting outer tube 7, thereby extending the heat exchange time between the air and the coolant, making it easier for the air to cool down fully, thereby enhancing the cooling effect of the equipment.

[0037] In order to ensure that the airflow in the spiral air channel 9 can flow better, the following features are also set:

[0038] One end of the connecting pipe 11 is rotatably connected to the coolant inlet pipe 2, and the other end is rotatably connected to the supporting inner pipe 10. A booster impeller 14 is coaxially fixedly provided on the outer wall of the connecting pipe 11, a support frame 12 is coaxially fixedly provided on the inner wall of the connecting pipe 11, and a power impeller 13 is coaxially fixedly provided on the support frame 12. The two ends of the connecting pipe 11 are respectively dynamically sealed with the coolant inlet pipe 2 and the supporting inner pipe 10.

[0039] When the equipment is running, the flow of coolant will drive the power impeller 13 to rotate, the rotation of the power impeller 13 will cause the connecting pipe 11 to rotate, the rotation of the connecting pipe 11 will drive the power-boosting impeller 14 to rotate, and the rotation of the power-boosting impeller 14 will accelerate the flow of air coming out of the spiral channel, ensuring that the cooled air can better enter the explosion-proof box 1 to assist in cooling the water-cooled equipment.

[0040] In order to show the detailed structure of the cleaning mechanism, the following features are also set:

[0041] The cleaning structure includes a limiting protrusion 16 (such as Figure 9 As shown), the receiving pipe seat 17 is rotatably arranged on the limiting boss 16, and the delivery pipe 28 is coaxially fixed on the end cover 26 (as shown Figure 6 As shown), a slag outlet 32 ​​is provided at one end of the conveying pipe 28 away from the receiving pipe seat 17, a receiving pipe 18 is fixedly provided on the side wall of the receiving pipe seat 17, and a slag inlet 23 is provided on the receiving pipe 18 (as shown). Figure 10 As shown in FIG), a scraper 24 provided at the slag inlet 23 and fixedly connected to the receiving tube 18, a bearing shaft 29 coaxially rotatably provided in the conveying tube 28, a slag conveying spiral blade 30 coaxially fixedly provided on the bearing shaft 29, and a driving motor 41 fixedly provided on the side wall of the supporting outer tube 7 (as shown in FIG). Figure 1 As shown in the figure, the output shaft of the drive motor 41 is connected to the bearing shaft 29 through a pulley, the slag outlet 32 ​​is connected to the slag storage box 38, the end of the conveying pipe 28 close to the receiving pipe seat 17 is rotatably connected to the receiving pipe seat 17, and the end of the bearing shaft 29 close to the receiving pipe seat 17 is fixedly connected to the receiving pipe seat 17.

[0042] The slag conveying spiral blade 30 is the conveying output end of the cleaning mechanism, and the slag scraper 24 is the cleaning output end of the cleaning mechanism.

[0043] When the equipment is running, the driving motor 41 drives the supporting shaft 29 to rotate, and the rotation of the supporting shaft 29 drives the slag conveying spiral blade 30 and the receiving pipe seat 17 to rotate together. The rotation of the receiving pipe seat 17 drives the accommodating tube 18 to rotate, and the rotation of the accommodating tube 18 drives the scraper plate 24 to scrape off the impurities blocked by the filter plate 15, and then enters the receiving pipe seat 17 through the slag inlet 23, and then the impurities are sent into the slag storage box 38 through the slag outlet 32 ​​under the rotation of the slag conveying spiral blade 30, ensuring that the filter plate 15 remains clean.

[0044] In order to show the detailed structure of the monitoring organization, the following features are also set:

[0045] The monitoring mechanism includes a storage cylinder 44 (such as Figure 2As shown), a mounting support plate 46 arranged beside the storage cylinder 44 and fixedly connected to the explosion-proof box 1, a piston rod 45 coaxially slidingly arranged in the storage cylinder 44, a limiting column 49 fixedly arranged on the mounting support plate 46, a connecting rod 50 rotatably arranged on the limiting column 49, and a first sliding rheostat 47 and a second sliding rheostat 48 fixedly arranged on the mounting support plate 46, both ends of the connecting rod 50 are provided with waist grooves, the sliding piece of the first sliding rheostat 47 is slidingly connected to the waist groove at one end of the connecting rod 50, and the sliding piece of the second sliding rheostat 48 is slidingly connected to the waist groove at the other end of the connecting rod 50, the end of the piston rod 45 away from the storage cylinder 44 is hinged to the sliding piece of the first sliding rheostat 47, the first sliding rheostat 47 is electrically connected to the drive motor 41, the second sliding rheostat 48 is electrically connected to the circulation pump, and the storage cylinder 44 stores expansion medium.

[0046] The piston rod 45 is the monitoring output end of the monitoring mechanism.

[0047] When the temperature in the explosion-proof box 1 rises, the expansion medium in the storage cylinder 44 expands, causing the piston rod 45 to extend. After the piston rod 45 extends, the piston rod 45 first pushes the sliding piece of the first sliding rheostat 47 to slide, causing the current of the drive motor 41 to decrease, thereby reducing the speed of the output shaft of the drive motor 41 (the purpose here is to prevent the subsequent coolant flow from increasing and the pressure at the filter plate 15 from increasing, thereby avoiding damage to the equipment). At the same time as the sliding piece of the first sliding rheostat 47 slides, the movement of the sliding piece of the first sliding rheostat 47 drives the sliding piece of the second sliding rheostat 48 to move in the opposite direction through the connecting rod 50, causing the power of the circulation pump to increase, thereby increasing the flow of coolant and further enhancing the cooling effect. After waiting for the temperature in the explosion-proof box 1 to return to normal, the piston rod 45 resets and drives the sliding pieces of the first sliding rheostat 47 and the second sliding rheostat 48 to reset through the connecting rod 50, thereby returning the power of the circulation pump to normal and the output shaft speed of the drive motor 41 to normal.

[0048] In order to ensure that the impurities scraped from the filter plate 15 can be better delivered to the delivery pipe 28, the following features are also provided:

[0049] The cleaning mechanism also includes a transmission rod 20 that is coaxially rotatable in the accommodating tube 18, a slag transporting spiral blade 21 that is coaxially fixed on the transmission rod 20, a transmission gear 22 that is coaxially fixed on the end of the transmission rod 20, and a transmission ring gear 25 that is coaxially fixed on the inner wall of the supporting inner tube 10, and the transmission gear 22 is meshed with the transmission ring gear 25.

[0050] When the containing tube 18 rotates, the transmission gear 22 engages with the transmission gear ring 25 and rotates. The rotation of the transmission gear 22 drives the transmission rod 20 to rotate. The rotation of the transmission rod 20 drives the slag transport spiral blade 21 to rotate. The rotation of the slag transport spiral blade 21 allows the impurities entering from the slag inlet 23 to be smoothly transported to the receiving tube seat 17.

[0051] To ensure that excess coolant contained in the impurities can be discharged during transportation, the following features are also set:

[0052] A plurality of one-way water filtering holes 19 are provided on the walls of the receiving pipe 18 and the delivery pipe 28 .

[0053] When impurities are transported in the receiving pipe 18 and the delivery pipe 28, excess coolant will be filtered out through the one-way water filter hole 19, ensuring that only impurities are transported and preventing coolant from being transported out and causing waste.

[0054] In order to ensure that impurities in the delivery pipe 28 can better enter the guide box 37 without clogging, the following features are also provided:

[0055] The cleaning mechanism also includes a slag discharge box 33 fixedly arranged at the slag outlet 32, and a vibration box 34 (such as a vibration box 34) slidably connected to the slag discharge box 33. Figure 3 As shown), a connecting square box 39 fixedly provided on the slag storage box 38, a contact protrusion 35 fixedly provided on the vibration square box 34, a return spring 40 provided on the connecting square box 39 and a cam 31 coaxially fixedly provided on the bearing shaft 29, the connecting square box 39 is slidably connected to the vibration square box 34, the contact protrusion 35 contacts the cam 31, one end of the return spring 40 is connected to the vibration square box 34, and the other end is connected to the connecting square box 39.

[0056] When the bearing shaft 29 rotates, the bearing shaft 29 rotates and drives the cam 31 to rotate. The cam 31 rotates and repeatedly hits the contact protrusion 35. Under the action of the return spring 40, the vibration box 34 is repeatedly shaken, causing impurities to quickly fall into the slag storage box 38, ensuring the normal operation of the equipment.

[0057] The working principle of this device is as follows: the coolant first enters the supporting inner tube 10 through the liquid inlet 27, then passes through the filter plate 15 and the connecting tube 11, and finally enters the explosion-proof box 1 through the coolant input pipe 2, and finally flows back to the radiator through the coolant return pipe 3. When the coolant flows in the cooling pipe in the explosion-proof box 1, the heat in the explosion-proof box 1 is taken away by the action of heat exchange. At the same time, the external blowing equipment sends the wind from the air inlet 43 into the spiral air duct 9, and then enters the interior of the explosion-proof box 1 through the wind cover 36, the guide box 37 and the air inlet box 5, and finally is discharged from the air outlet box 4, thereby assisting the coolant in the cooling pipe to synchronously cool the explosion-proof box 1 and improve the cooling efficiency. During the operation of the equipment, the flow of coolant will drive the power impeller 13 to rotate, and the rotation of the power impeller 13 will cause the connecting pipe 11 to rotate. The rotation of the connecting pipe 11 will drive the power impeller 14 to rotate. The rotation of the power impeller 14 will accelerate the flow of air coming out of the spiral channel, ensuring that the cooled air can better enter the explosion-proof box 1 to assist in cooling the water-cooled equipment. In addition, the drive motor 41 drives the bearing shaft 29 to rotate, and the rotation of the bearing shaft 29 drives the slag conveying spiral blade 30 and the receiving pipe seat 17 to rotate together. The rotation of the receiving pipe seat 17 drives the receiving pipe 18 to rotate. The rotation of the receiving pipe 18 drives the scraper plate 24 to scrape off the impurities blocked by the filter plate 15. At the same time, the transmission gear 22 is engaged with the transmission gear ring 25 to rotate. The rotation of the transmission gear 22 drives the transmission rod 20 to rotate. The rotation of the transmission rod 20 drives the slag conveying spiral blade 21 to rotate, facilitating the impurities to enter the receiving pipe seat 17 from the slag inlet 23. Then, under the rotation of the slag conveying spiral blade 30, the impurities are sent to the slag storage box 38 through the slag outlet 32, ensuring that the filter plate 15 remains clean. When the bearing shaft 29 rotates, the bearing shaft 29 rotates and drives the cam 31 to rotate. The cam 31 rotates and repeatedly hits the contact protrusion 35. Under the action of the return spring 40, the vibration box 34 is repeatedly shaken, causing impurities to quickly fall into the slag storage box 38, ensuring the normal operation of the equipment.

[0058] When the temperature inside the explosion-proof box 1 rises, the expansion medium in the storage cylinder 44 expands, causing the piston rod 45 to extend. After the piston rod 45 extends, the piston rod 45 first pushes the slider of the first sliding rheostat 47 to slide, causing the current of the drive motor 41 to decrease, thereby reducing the speed of the output shaft of the drive motor 41. While the slider of the first sliding rheostat 47 slides, the movement of the slider of the first sliding rheostat 47 drives the slider of the second sliding rheostat 48 to move in the opposite direction through the connecting rod 50, causing the power of the circulation pump to increase, thereby increasing the flow rate of the coolant, thereby enhancing the cooling effect, and at this time, due to the increase in the flow rate of the coolant, the speed of the power impeller 13 will also increase, thereby increasing the speed of the booster impeller 14. Under the rotation of the booster impeller 14, the air in the spiral air channel 9 will accelerate to enter the explosion-proof box 1, thereby enhancing the cooling effect when the temperature of the explosion-proof box 1 rises. In addition, since the flow rate of the coolant increases at this time, the speed of the drive motor 41 is reduced to prevent damage to the equipment. After the temperature in the explosion-proof box 1 drops to normal, the piston rod 45 resets and drives the sliding plates of the first sliding rheostat 47 and the second sliding rheostat 48 to reset through the connecting rod 50, so that the power of the circulation pump becomes normal and the output shaft speed of the drive motor 41 becomes normal.

[0059] The above embodiments merely represent one or several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An explosion-proof switchgear for underground coal mines, comprising an explosion-proof box (1) and a liquid cooling system, wherein the liquid cooling system comprises a cooling pipe, a circulation pump and a radiator, and is characterized in that: The utility model also includes a monitoring mechanism, an enhancement mechanism, a cleaning mechanism, and a coolant input pipe (2) and a coolant return pipe (3) fixedly arranged on the explosion-proof box (1). The coolant input pipe (2), the cooling pipe, and the coolant return pipe (3) constitute a coolant circulation path. The monitoring mechanism has a monitoring output end for monitoring the temperature in the explosion-proof box (1). The monitoring output end is connected to the enhancement mechanism. The enhancement mechanism includes two air inlet boxes (5) fixedly arranged on both sides of the coolant input pipe (2) in a symmetrical state, a fixed An air outlet box (4) arranged beside the coolant return pipe (3), a supporting bracket (6) fixedly arranged on the side wall of the explosion-proof box (1), a supporting outer tube (7) coaxial with the coolant inlet pipe (2) and fixedly connected to the supporting bracket (6), a supporting inner tube (10) coaxially arranged in the supporting outer tube (7), a connecting pipe (11) coaxially arranged with the coolant inlet pipe (2), a filter plate (15) coaxially fixedly arranged in the supporting inner tube (10), a filter plate (15) fixedly arranged on the side wall of the supporting outer tube (7), and a filter plate (15) fixedly arranged on the side wall of the supporting outer tube (7). A slag storage box (38), an end cover (26) fixedly arranged at the end of the supporting inner tube (10), a plurality of liquid inlets (27) formed in an annular shape on the end cover (26), a sealing ring (42) coaxial with the end cover (26) and fixedly connected to the supporting outer tube (7), an air inlet (43) formed on the sealing ring (42), a wind hood (36) coaxially fixedly arranged at one end of the supporting outer tube (7) away from the sealing ring (42), and two guide boxes (37) symmetrically fixedly arranged on the wind hood (36). ), one end of the guide box (37) is connected to the air inlet box (5) and the other end is connected to the wind cover (36), the cavity between the inner wall of the supporting outer tube (7) and the outer wall of the supporting inner tube (10) is used for air to pass through, the two ends of the connecting pipe (11) are respectively connected to the supporting inner tube (10) and the coolant input pipe (2), the cleaning mechanism includes a cleaning output end and a transport output end, the cleaning output end is used to clean impurities on the filter plate (15), and the transport output end is used to transport the cleaned impurities to the slag storage box (38); The cleaning structure includes a limiting boss (16) formed at the center of the filter plate (15), a receiving pipe seat (17) rotatably arranged on the limiting boss (16), a delivery pipe (28) coaxially fixed on the end cover (26), a slag outlet (32) opened at one end of the delivery pipe (28) away from the receiving pipe seat (17), a receiving pipe (18) fixedly arranged on the side wall of the receiving pipe seat (17), a slag inlet (23) opened on the receiving pipe (18), a scraper (24) arranged at the slag inlet (23) and fixedly connected to the receiving pipe (18), a coaxial rotating A bearing shaft (29) is rotatably arranged in the conveying pipe (28), a slag conveying spiral blade (30) is coaxially fixedly arranged on the bearing shaft (29), and a driving motor (41) is fixedly arranged on the side wall of the supporting outer pipe (7), the output shaft of the driving motor (41) is connected to the bearing shaft (29) through a pulley, the slag outlet (32) is connected to the slag storage box (38), one end of the conveying pipe (28) close to the receiving pipe seat (17) is rotatably connected to the receiving pipe seat (17), and one end of the bearing shaft (29) close to the receiving pipe seat (17) is fixedly connected to the receiving pipe seat (17).

2. The explosion-proof switch device for underground coal mines according to claim 1, characterized in that: A spiral support plate (8) is fixedly provided on the inner wall of the supporting outer tube (7), and the spiral support plate (8) is fixedly connected to the outer wall of the supporting inner tube (10). The spiral support plate (8) divides the cavity between the supporting outer tube (7) and the supporting inner tube (10) into a spiral airway (9).

3. The explosion-proof switch device for underground coal mines according to claim 2, characterized in that: One end of the connecting pipe (11) is rotatably connected to the coolant inlet pipe (2), and the other end is rotatably connected to the supporting inner pipe (10). A booster impeller (14) is coaxially fixedly provided on the outer wall of the connecting pipe (11), a support frame (12) is coaxially fixedly provided on the inner wall of the connecting pipe (11), and a power impeller (13) is coaxially fixedly provided on the support frame (12). The two ends of the connecting pipe (11) are respectively connected to the coolant inlet pipe (2) and the supporting inner pipe (10) in a dynamic seal.

4. The explosion-proof switch device for underground coal mines according to claim 1, characterized in that: The slag conveying spiral blade (30) is the conveying output end of the cleaning mechanism, and the slag scraping plate (24) is the cleaning output end of the cleaning mechanism.

5. The explosion-proof switch device for underground coal mines according to claim 4, characterized in that: The monitoring mechanism includes a storage cylinder (44) fixedly arranged on the side wall of the explosion-proof box (1), a mounting support plate (46) arranged beside the storage cylinder (44) and fixedly connected to the explosion-proof box (1), a piston rod (45) coaxially slidably arranged in the storage cylinder (44), a limiting column (49) fixedly arranged on the mounting support plate (46), a connecting rod (50) rotatably arranged on the limiting column (49), and a first sliding rheostat (47) and a second sliding rheostat (48) fixedly arranged on the mounting support plate (46), the connecting rod ( Both ends of the connecting rod (50) are provided with waist grooves, the sliding piece of the first sliding rheostat (47) is slidably connected to the waist groove at one end of the connecting rod (50), the sliding piece of the second sliding rheostat (48) is slidably connected to the waist groove at the other end of the connecting rod (50), the end of the piston rod (45) away from the storage cylinder (44) is hinged to the sliding piece of the first sliding rheostat (47), the first sliding rheostat (47) is electrically connected to the drive motor (41), the second sliding rheostat (48) is electrically connected to the circulation pump, and the storage cylinder (44) stores the expansion medium.

6. The explosion-proof switch device for underground coal mines according to claim 5, characterized in that: The piston rod (45) is the monitoring output end of the monitoring mechanism.

7. The explosion-proof switch device for underground coal mines according to claim 6, characterized in that: The cleaning mechanism further comprises a transmission rod (20) coaxially rotatably arranged in the accommodating tube (18), a slag transport spiral blade (21) coaxially fixedly arranged on the transmission rod (20), a transmission gear (22) coaxially fixedly arranged at the end of the transmission rod (20), and a transmission ring gear (25) coaxially fixedly arranged on the inner wall of the supporting inner tube (10), wherein the transmission gear (22) meshes with the transmission ring gear (25).

8. The explosion-proof switch device for underground coal mines according to claim 7, characterized in that: A plurality of one-way water filtering holes (19) are provided on the walls of the receiving pipe (18) and the delivery pipe (28).

9. The explosion-proof switch device for underground coal mines according to claim 8, characterized in that: The cleaning mechanism further comprises a slag discharge box (33) fixedly arranged at the slag discharge port (32), a vibration box (34) slidably connected to the slag discharge box (33), a connecting box (39) fixedly arranged on the slag storage box (38), a contact protrusion (35) fixedly arranged on the vibration box (34), a return spring (40) arranged on the connecting box (39), and a cam (31) coaxially fixedly arranged on the bearing shaft (29); the connecting box (39) is slidably connected to the vibration box (34), the contact protrusion (35) contacts the cam (31), and one end of the return spring (40) is connected to the vibration box (34), and the other end is connected to the connecting box (39).

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