Power distribution cabinet for coal mine

Abstract

The invention relates to the technical field of power distribution cabinets, in particular to a power distribution cabinet for a coal mine, and the power distribution cabinet comprises a cabinet body, and the bottom end of the cabinet body is fixedly connected with a plurality of supporting legs; the cabinet interior dehumidification mechanism comprises a plurality of inclined heat conduction plates which are fixedly connected to the inner walls of the two opposite sides of the cabinet body, ventilation hoods are fixedly connected to the outer walls of the two opposite sides of the cabinet body, and the other ends of the inclined heat conduction plates extend into the ventilation hoods. Through combination of the in-cabinet dehumidification mechanism and the out-cabinet dehumidification mechanism and a multi-time circulation mode, external air is transmitted into the dehumidification cover through the exhaust fan and is condensed through the semiconductor refrigeration plate, moisture is rapidly condensed into water drops to be discharged, and preliminary dehumidification is completed; air in the dehumidification cover is exhausted to the ventilation cover through an air draft pump to make contact with the inclined heat conduction plate, cooling and condensation of hot air in the cabinet body are accelerated, and meanwhile air in the ventilation cover is exhausted into the cabinet body; and then air in the cabinet body is pumped out through the exhaust fan and discharged to the dehumidification cover for secondary condensation and dehumidification.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution cabinets, and more particularly to a distribution cabinet for coal mine shafts. Background Art

[0002] In the complex underground working environment of coal mines, large-power consumption equipment such as coal shearers, roadheaders, and underground ventilators is the core force to ensure the efficient operation of mining operations. These devices have huge operating powers and extremely high requirements for the stability and safety of power supply. As the "central nervous system" of the coal mine power supply system, high-voltage distribution cabinets orderly arrange the power supply lines of different devices through precise circuit design and scientific layout, and accurately distribute voltages according to the actual power consumption needs of each device.

[0003] Existing distribution cabinets for coal mine shafts have relatively high requirements for dehumidification. The reason is that the underground space of coal mine shafts is relatively enclosed and the humidity is generally high, and a large amount of water vapor in the air is extremely easy to invade the interior of the distribution cabinet. Therefore, the requirements for dehumidification are relatively high. However, existing mine-use distribution cabinets generally install dehumidifiers inside the distribution cabinet. However, due to the fact that the mine is full of moisture, even if a dehumidifier is installed inside the distribution cabinet, new moisture will still enter during the heat dissipation process of the distribution cabinet, which greatly reduces the dehumidification effect and makes it difficult to continuously and effectively guarantee a dry environment inside the distribution cabinet. Summary of the Invention

[0004] In view of the above-mentioned drawbacks of the prior art, the present invention provides a distribution cabinet for coal mine shafts, which can effectively solve the problem that it is difficult to continuously and effectively guarantee a dry environment inside the distribution cabinet in the prior art.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: The present invention provides a distribution cabinet for coal mine shafts, comprising: a cabinet body, the bottom end of the cabinet body is fixedly connected with a plurality of support legs; an in-cabinet dehumidification mechanism, the in-cabinet dehumidification mechanism includes a plurality of inclined heat-conducting plates fixedly connected to the inner walls of two opposite sides of the cabinet body, ventilation hoods are fixedly connected to the outer walls of two opposite sides of the cabinet body, and the other ends of the inclined heat-conducting plates extend into the ventilation hoods. Cleaning components are arranged at the upper and lower ends of the inclined heat-conducting plates, and the cleaning components are used to clean the water droplets on the inclined heat-conducting plates; an out-of-cabinet dehumidification mechanism, the out-of-cabinet dehumidification mechanism includes an air outlet opened at the bottom end of the cabinet body, a dehumidification cover is fixedly connected to the bottom end of the air outlet, the bottom of the dehumidification cover is inclined, a semiconductor refrigeration plate is fixedly connected to the bottom end of the dehumidification cover, a plurality of shunt heat-conducting plates are fixedly connected to the top end of the semiconductor refrigeration plate, and the out-of-cabinet dehumidification mechanism further includes a detection component for detecting the humidity inside the cabinet.

[0006] Preferably, the external dehumidification mechanism of the cabinet further includes an exhaust fan arranged at the air outlet. A wind guide plate is arranged inside the air outlet, and the wind guide plate is located below the exhaust fan. A drain pipe is fixedly communicated with the inner wall of the dehumidification cover and extends to the outside of the dehumidification cover. The communication direction of the drain pipe is the lower part of the dehumidification cover. The exhaust fan and the semiconductor refrigeration plate are electrically connected to a PLC controller to form an external dehumidification circuit.

[0007] Preferably, the detection component includes a detection box fixedly connected to the bottom end of the cabinet body. The other end of the drain pipe penetrates the inner wall of the detection box and is fixedly communicated with a three-way pipe. The drain pipe and the three-way pipe are inclined from the dehumidification cover towards the detection box. One outlet of the three-way pipe is inside the detection box, and the other outlet of the three-way pipe penetrates the detection box and extends to the outside of the detection box. First solenoid valves are arranged at both outlets of the three-way pipe.

[0008] Preferably, a pressing plate is slidably connected to the inner wall of the detection box. A resistance plate is embedded in the inner wall of the detection box. The bottom end of the pressing plate is fixedly connected with an L-shaped energized plate that is slidably connected to the resistance plate. The pressing plate and the inner bottom wall of the detection box are jointly fixedly connected with two symmetrically arranged detection springs. The L-shaped energized plate, the resistance plate and the PLC controller are electrically connected to form a detection circuit. The L-shaped energized plate and the resistance plate form a sliding rheostat. During the sliding process of the L-shaped energized plate on the resistance plate towards the lower part, the resistance of the sliding rheostat in the detection circuit gradually decreases. An air vent is opened at the bottom end of the detection box. The top end of the pressing plate is fixedly communicated with a flexible pipe, and the other end of the flexible pipe penetrates the bottom of the detection box. A second solenoid valve is arranged inside the flexible pipe.

[0009] Preferably, the internal dehumidification mechanism of the cabinet further includes an exhaust fan fixedly connected to the inner wall of the air outlet. The air outlet of the exhaust fan is communicated with the inside of the dehumidification cover. Two symmetrically arranged air extraction pumps are fixedly connected to the outer wall of the cabinet body. The output end of the air extraction pump is fixedly connected with an air extraction pipe, and the other end of the air extraction pipe is communicated with the inside of the dehumidification cover. The output end of the air extraction pump is fixedly communicated with an exhaust pipe. The two exhaust pipes are respectively communicated with the two ventilation covers. An air inlet is opened on the outer wall of the cabinet body. A blower is arranged inside the air inlet. An air collecting cover is fixedly connected to the outer wall of the air inlet. Connecting pipes are arranged between the air collecting cover and the two ventilation covers. The PLC controller is electrically connected to the air extraction pump, the first solenoid valve, the second solenoid valve, the air extraction pump, the blower, the exhaust fan and the exhaust fan to form a control circuit.

[0010] Preferably, the cleaning component includes two symmetrically arranged motors fixedly connected to the outer wall of the cabinet. Two symmetrically arranged fixing plates are fixedly connected to the inner wall of the cabinet. The output end of the motor is fixedly connected to a reciprocating lead screw. A limiting rod is fixedly connected between the cabinet and the fixing plate. A reciprocating rod is sleeved on the outer wall of the reciprocating lead screw, and the limiting rod slidably penetrates through the reciprocating rod. A sliding groove is formed in the outer wall of the reciprocating rod facing the inclined heat conduction plate. A plurality of sliding blocks are fixedly connected to the inner wall of the sliding groove. A cleaning plate is fixedly connected to the outer wall of the sliding block. The upper and lower ends of the cleaning plate are respectively in sliding contact with the opposite sides of the adjacent two inclined heat conduction plates.

[0011] Preferably, connection blocks are fixedly connected to both the position near the top and the position near the bottom of the reciprocating rod. An upper cleaning block is fixedly connected to the outer wall of the upper connection block, and a lower cleaning block is fixedly connected to the outer wall of the lower connection block. An upper moving groove is formed in the bottom end of the upper cleaning block, and a lower moving groove is formed in the bottom end of the lower cleaning block. A first return spring is fixedly connected to the inner top wall of the upper moving groove, and a second return spring is fixedly connected to the inner bottom wall of the lower moving groove. The other end of the first return spring is fixedly connected to an upper cleaning piece, and the upper cleaning piece is in sliding contact with the top end of the uppermost inclined heat conduction plate. The other end of the second return spring is fixedly connected to a lower cleaning piece, and the lower cleaning piece is in sliding contact with the bottom end of the lowermost inclined heat conduction plate.

[0012] Preferably, two symmetrically arranged water collecting frames are fixedly connected to the inner wall of the cabinet, and the water collecting frames are located at the lowest positions of the two inclined heat conduction plates on both sides. A water collecting groove is formed in the bottom end of the water collecting frame. A water outlet pipe is fixedly communicated with the bottom end of the water collecting groove, and the other end of the water outlet pipe extends to the outside of the cabinet. A one-way valve is arranged in the water outlet pipe.

[0013] The technical solution provided by the present invention has the following beneficial effects compared with the known prior art: 1. By combining the in-cabinet dehumidification mechanism and the out-of-cabinet dehumidification mechanism and through multiple cycles, the external air is transmitted into the dehumidification cover by the exhaust fan, condensed by the semiconductor refrigeration plate, and the moisture is quickly condensed into water droplets and discharged to complete the preliminary dehumidification. Then, the air in the dehumidification cover is discharged to contact the ventilation cover and the inclined heat conduction plate by the exhaust pump to accelerate the cooling and condensation of the hot air inside the cabinet, and at the same time, the air in the ventilation cover is discharged into the cabinet. Then, the air in the cabinet is pumped out by the exhaust fan and discharged to the dehumidification cover for secondary condensation and dehumidification. In this way, the air humidity inside the cabinet is continuously reduced through multiple cycles.

[0014] 2. Through the detection component, it is started every 1 hour through the PLC controller, each start lasting for 10 minutes. The exhaust fan is turned off, and only the exhaust blower is used to discharge the moisture in the cabinet to the dehumidification cover for condensation. The first solenoid valve in the lower water outlet of the three-way pipe is opened, and the other first solenoid valve is closed, so that the condensed water enters the extrusion plate of the detection box. The downward sliding of the extrusion plate drives the L-shaped energized plate to slide on the resistance plate, changing the resistance value of the detection circuit. According to the change of the resistance value, the humidity of the air in the cabinet is indirectly reflected. When the humidity in the cabinet is high, the PLC controller controls the semiconductor to increase the refrigeration power, and the operating powers of equipment such as the exhaust pump, air supply fan, exhaust fan, and exhaust blower also increase accordingly, accelerating the air circulation and dehumidification efficiency.

[0015] 3. Through the cleaning component, it is started every 2 hours through the PLC controller. The motor drives the reciprocating lead screw to rotate, causing the reciprocating rod to perform a reciprocating linear motion along the reciprocating lead screw under the restriction of the limiting rod, driving the cleaning plate to reciprocate between the inclined heat-conducting plates to wipe the water droplets on the surface; at the same time, the connecting blocks at the top and bottom of the reciprocating rod drive the upper cleaning block and the lower cleaning block to move respectively. The return springs in the upper and lower cleaning blocks push the cleaning pieces to be in close contact with the top and bottom of the inclined heat-conducting plates for cleaning, ensuring that there is no accumulated water on the entire surface of the inclined heat-conducting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Schematic three-dimensional structure of the present invention Figure 1 ; Figure 2 Schematic three-dimensional structure of the present invention Figure 2 ; Figure 3 Schematic cross-sectional three-dimensional structure diagram of the present invention; Figure 4 Schematic three-dimensional structure diagram of the cleaning component of the present invention; Figure 5 For the present invention Figure 4 Schematic three-dimensional structure diagram of part A in Figure 6 For the present invention Figure 4 Schematic three-dimensional structure diagram of part B in Figure 7 Schematic cross-sectional three-dimensional structure diagram of the detection box of the present invention.

[0018] Reference numerals: 1, cabinet body; 2, support legs; 3, in-cabinet dehumidification mechanism; 31, inclined heat conduction plate; 32, ventilation hood; 33, cleaning assembly; 331, motor; 332, fixing plate; 333, reciprocating screw rod; 334, limiting rod; 335, reciprocating rod; 336, sliding groove; 337, sliding block; 338, cleaning plate; 339, connecting block; 3310, upper cleaning block; 3311, lower cleaning block; 3312, upper moving groove; 3313, lower moving groove; 3314, first return spring; 3315, second return spring; 3316, upper cleaning piece; 3317, lower cleaning piece; 34, exhaust fan; 35, exhaust pump; 36, exhaust duct; 37, discharge duct; 38, air inlet; 39, air blower; 310, air collecting hood; 311, connecting pipe; 312, water collecting frame; 313, drain pipe; 4, out-of-cabinet dehumidification mechanism; 41, air outlet; 42, dehumidification hood; 43, semiconductor refrigeration plate; 44, shunt heat conduction plate; 45, detection assembly; 451, detection box; 452, three-way pipe; 453, extrusion plate; 454, L-shaped energized plate; 455, detection spring; 456, ventilation port; 457, flexible pipe; 46, exhaust fan; 47, air deflector; 48, water outlet pipe. Detailed implementation manners

[0019] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] The present invention will be further described below with reference to the embodiments.

[0021] Embodiment: Refer to Figures 1 to 7 , a power distribution cabinet for coal mine shafts, comprising: A cabinet body 1, and a plurality of support legs 2 are fixedly connected to the bottom end of the cabinet body 1; An in-cabinet dehumidification mechanism 3, the in-cabinet dehumidification mechanism 3 includes a plurality of inclined heat conduction plates 31 fixedly connected to the inner walls of two opposite sides of the cabinet body 1, ventilation hoods 32 are fixedly connected to the outer walls of two opposite sides of the cabinet body 1, and the other ends of the inclined heat conduction plates 31 extend into the ventilation hoods 32. Cleaning assemblies 33 are arranged at the upper and lower ends of the inclined heat conduction plates 31, and the cleaning assemblies 33 are used for cleaning the water droplets on the inclined heat conduction plates 31; The direction of heat transfer is from a high-temperature object to a low-temperature object, and the transfer rate is closely related to the temperature difference between the two. When the exhaust pump 35 extracts the preliminarily dehumidified air in the dehumidification cover 42 and discharges it into the ventilation cover 32, since this air has been refrigerated by the semiconductor refrigeration plate 43 in the dehumidification cover 42 and has a lower temperature, while the inside of the cabinet body 1 generates heat due to the operation of the equipment and the air temperature is relatively high. The inclined heat conduction plate 31 is in direct contact with the hot air inside the cabinet body 1 and also has a relatively high temperature. At this time, there is a significant temperature difference between the low-temperature air in the ventilation cover 32 and the inclined heat conduction plate 31. According to the principle of heat transfer, the heat of the inclined heat conduction plate 31 will be quickly transferred to the low-temperature air in the ventilation cover 32. In this process, the temperature of the inclined heat conduction plate 31 drops rapidly, making the temperature difference between it and the hot air inside the cabinet body 1 further increase, thereby accelerating the speed of heat transfer from the hot air inside the cabinet body 1 to the inclined heat conduction plate 31, speeding up the cooling process of the hot air, and enabling the air to be condensed on the inclined heat conduction plate 31.

[0022] The external cabinet dehumidification mechanism 4 includes an air outlet 41 opened at the bottom end of the cabinet body 1. The bottom end of the air outlet 41 is fixedly connected with a dehumidification cover 42. The bottom of the dehumidification cover 42 is inclined. The bottom end of the dehumidification cover 42 is fixedly connected with a semiconductor refrigeration plate 43. The top end of the semiconductor refrigeration plate 43 is fixedly connected with a plurality of shunt heat conduction plates 44. The external cabinet dehumidification mechanism 4 further includes a detection component 45 for detecting the humidity inside the cabinet.

[0023] The external cabinet dehumidification mechanism 4 further includes an exhaust fan 46 arranged at the air outlet 41. A wind guide plate 47 is arranged inside the air outlet 41, and the wind guide plate 47 is located below the exhaust fan 46. The inner wall of the dehumidification cover 42 is fixedly communicated with a drain pipe 313, and the drain pipe 313 extends to the outside of the dehumidification cover 42, and the communication direction of the drain pipe 313 is the lower part of the dehumidification cover 42. The exhaust fan 46 and the semiconductor refrigeration plate 43 are electrically connected to a PLC controller to form an external cabinet dehumidification circuit. The wind guide plate 47 is used to make the air first pass through the upper part of the dehumidification cover 42 and then slowly flow towards the lower part to increase the condensation time.

[0024] The detection component 45 includes a detection box 451 fixedly connected to the bottom end of the cabinet body 1. The other end of the drain pipe 313 penetrates the inner wall of the detection box 451 and is fixedly communicated with a three-way pipe 452. The drain pipe 313 and the three-way pipe 452 are inclined from the dehumidification cover 42 towards the detection box 451. One of the outlets of the three-way pipe 452 is inside the detection box 451, and the other outlet of the three-way pipe 452 penetrates the detection box 451 and extends to the outside of the detection box 451. First solenoid valves are provided at both outlets of the three-way pipe 452.

[0025] A pressing plate 453 is slidably connected to the inner wall of the detection box 451. A resistance plate is embedded in the inner wall of the detection box 451. The bottom end of the pressing plate 453 is fixedly connected to an L-shaped energized plate 454 that is slidably connected to the resistance plate. The pressing plate 453 and the inner bottom wall of the detection box 451 are jointly fixedly connected with two symmetrically arranged detection springs 455. The L-shaped energized plate 454, the resistance plate and the PLC controller are electrically connected to form a detection circuit. The L-shaped energized plate 454 and the resistance plate form a sliding rheostat. During the downward sliding process of the L-shaped energized plate 454 on the resistance plate, the resistance of the sliding rheostat in the detection circuit gradually decreases. An air vent 456 is opened at the bottom end of the detection box 451. The top end of the pressing plate 453 is fixedly communicated with a flexible tube 457, and the other end of the flexible tube 457 penetrates the bottom of the detection box 451. A second solenoid valve is arranged inside the flexible tube 457.

[0026] The dehumidification mechanism 3 inside the cabinet further includes an exhaust fan 34 fixedly connected to the inner wall of the air outlet 41. The air outlet of the exhaust fan 34 is communicated with the inside of the dehumidification cover 42. Two symmetrically arranged exhaust pumps 35 are fixedly connected to the outer wall of the cabinet body 1. The output end of the exhaust pump 35 is fixedly connected to an exhaust pipe 36. The other end of the exhaust pipe 36 is communicated with the inside of the dehumidification cover 42. The output end of the exhaust pump 35 is fixedly communicated with an exhaust duct 37. The two exhaust ducts 37 are respectively communicated with the two ventilation covers 32. An air inlet 38 is opened on the outer wall of the cabinet body 1. A blower 39 is arranged inside the air inlet 38. An air collecting cover 310 is fixedly connected to the outer wall of the air inlet 38. Connecting pipes 311 are arranged between the air collecting cover 310 and the two ventilation covers 32. The PLC controller is electrically connected to the exhaust pump 35, the first solenoid valve, the second solenoid valve, the exhaust pump 35, the blower 39, the exhaust fan 34, and the exhaust fan 46 to form a control circuit.

[0027] The cleaning assembly 33 includes two symmetrically arranged motors 331 fixedly connected to the outer wall of the cabinet body 1. Two symmetrically arranged fixing plates 332 are fixedly connected to the inner wall of the cabinet body 1. The output end of the motor 331 is fixedly connected to a reciprocating lead screw 333. A limiting rod 334 is fixedly connected between the cabinet body 1 and the fixing plate 332. A reciprocating rod 335 is sleeved on the outer wall of the reciprocating lead screw 333, and the limiting rod 334 slidably penetrates the reciprocating rod 335. A sliding groove 336 is opened on the outer wall of the reciprocating rod 335 facing the inclined heat conducting plate 31. A plurality of sliding blocks 337 are fixedly connected to the inner wall of the sliding groove 336. A cleaning plate 338 is fixedly connected to the outer wall of the sliding block 337. The upper and lower ends of the cleaning plate 338 are respectively in sliding contact with the opposite sides of the adjacent two inclined heat conducting plates 31.

[0028] At both the position near the top end and the position near the bottom end of the reciprocating rod 335, connecting blocks 339 are fixedly connected. An upper cleaning block 3310 is fixedly connected to the outer wall of the connecting block 339 at the upper position, and a lower cleaning block 3311 is fixedly connected to the outer wall of the connecting block 339 at the lower position. An upper moving groove 3312 is opened at the bottom end of the upper cleaning block 3310, and a lower moving groove 3313 is opened at the bottom end of the lower cleaning block 3311. A first return spring 3314 is fixedly connected to the inner top wall of the upper moving groove 3312, and a second return spring 3315 is fixedly connected to the inner bottom wall of the lower moving groove 3313. The other end of the first return spring 3314 is fixedly connected to an upper cleaning piece 3316, and the upper cleaning piece 3316 is in sliding contact with the top end of the uppermost inclined heat conducting plate 31. The other end of the second return spring 3315 is fixedly connected to a lower cleaning piece 3317, and the lower cleaning piece 3317 is in sliding contact with the bottom end of the lowermost inclined heat conducting plate 31.

[0029] Two symmetrically arranged water collecting frames 312 are fixedly connected to the inner wall of the cabinet body 1, and the water collecting frames 312 are located at the lowest positions of the two inclined heat conducting plates 31 on both sides. A water collecting groove is opened at the bottom end of the water collecting frame 312, and a water outlet pipe 48 is fixedly communicated with the bottom end of the water collecting groove. The other end of the water outlet pipe 48 extends to the outside of the cabinet body 1, and a one-way valve is arranged in the water outlet pipe 48.

[0030] The working principle of the present invention is as follows: First, start the air extraction pump 35, the air supply fan 39, the air extraction fan 34, the exhaust fan 46, and the semiconductor refrigeration plate 43. The air from the outside is transmitted into the dehumidification cover 42 through the air extraction fan 34, and then the air is condensed by the semiconductor refrigeration plate 43. In the low-temperature environment inside the dehumidification cover 42, the moisture in the air quickly condenses into water droplets, which adhere to the inner wall of the dehumidification cover 42, the shunt heat conducting plate 44, and the surface of the semiconductor refrigeration plate 43. Under the action of gravity, these water droplets flow along the inclined inner wall of the dehumidification cover 42 to the lower part and are discharged outside the dehumidification cover 42 through the drain pipe 313, completing the preliminary dehumidification treatment of the air. Then, the condensed air inside the dehumidification cover 42 is extracted by the air extraction pump 35 and then discharged into the ventilation cover 32. Inside the ventilation cover 32, the air comes into full contact with the extended inclined heat conducting plate 31, further absorbing the heat transferred by the inclined heat conducting plate 31 and providing a low-temperature environment for the inclined heat conducting plate 31, accelerating the cooling and condensation process of the hot air inside the cabinet body 1 on the surface of the inclined heat conducting plate 31. Then, the air inside the ventilation cover 32 is discharged into the cabinet body 1 through the air inlet 38. Meanwhile, the air inside the cabinet body 1 is extracted by the exhaust fan 46 and then discharged into the dehumidification hood 42 for condensation treatment. Although this air has been preliminarily dehumidified, it still contains a certain amount of moisture. When it enters the dehumidification hood 42 again, under the continuous refrigeration of the semiconductor refrigeration plate 43, the remaining moisture is further condensed into water droplets, realizing the secondary dehumidification treatment of the air inside the cabinet. Through this multiple-cycle method, the humidity of the air inside the cabinet is continuously reduced, continuously ensuring a dry environment inside the cabinet body 1.

[0031] During this process, the moisture inside the cabinet is detected by the detection component 45 (the detection component 45 is started every 1 hour through the PLC controller, and each start lasts for 10 minutes). During the detection process, the exhaust fan 34 needs to be turned off, and then only the exhaust fan 46 is used to discharge the moisture inside the cabinet into the dehumidification hood 42 for condensation treatment, avoiding the possible interference of the air flow during the detection process caused by the operation of the exhaust fan 34 and ensuring the accuracy of the detection data. At the same time, the first solenoid valve in the lower water outlet of the three-way pipe 452 is opened, and the other first solenoid valve is closed (as Figure 7 shown), so that the condensed water enters the pressing plate 453 in the detection box 451. The pressing plate 453 slides downward under the action of the gravity of the water, driving the L-shaped energized plate 454 to slide on the resistance plate, thereby changing the resistance value in the detection circuit. Since the L-shaped energized plate 454 and the resistance plate form a sliding rheostat, during the downward sliding process of the L-shaped energized plate 454, the resistance of the sliding rheostat in the detection circuit gradually decreases. By detecting the change in the resistance value in the circuit, the humidity situation of the air inside the cabinet can be indirectly reflected. When the humidity inside the cabinet is high, more condensed water is generated, the downward sliding amplitude of the pressing plate 453 is large, and the resistance value decreases significantly; conversely, when the humidity inside the cabinet is low, the condensed water is less, the downward sliding amplitude of the pressing plate 453 is small, and the change in the resistance value is small. When the moisture inside the cabinet is high, it is necessary to control the semiconductor to increase the refrigeration power through the PLC controller, thereby accelerating the efficiency of dehumidifying the moisture inside the cabinet. When the moisture inside the cabinet is high, the operating powers of equipment such as the exhaust pump 35, the air supply fan 39, the exhaust fan 34, and the exhaust fan 46 will also increase accordingly to accelerate the circulating flow speed of the air, so that more humid air can enter the dehumidification hood 42 for treatment as soon as possible. In this case, increasing the refrigeration power of the semiconductor can match the enhanced operation of other equipment, ensuring that when the air passes through the dehumidification hood 42, it can make full use of the low-temperature environment for efficient dehumidification.

[0032] And after pre-testing, it is also necessary to start the cleaning component 33 through the PLC controller every 2 hours. After the motor 331 starts, it drives the reciprocating lead screw 333 to rotate, so that the reciprocating rod 335 sleeved on the reciprocating lead screw 333 makes a reciprocating linear motion along the reciprocating lead screw 333 under the restriction of the limiting rod 334. When the reciprocating rod 335 moves, the sliding block 337 in the sliding groove 336 drives the cleaning plate 338 to reciprocate between the two inclined heat conducting plates 31 that are close to each other. The cleaning plate 338 can wipe the water droplets remaining on the surface of the inclined heat conducting plate 31 clean, preventing the accumulation of water droplets from affecting the heat conduction efficiency.

[0033] Meanwhile, the connecting blocks 339 at the top and bottom of the reciprocating rod 335 drive the upper cleaning block 3310 and the lower cleaning block 3311 to move respectively. The first return spring 3314 in the upper cleaning block 3310 pushes the upper cleaning piece 3316 to be in close contact with the top of the uppermost inclined heat conducting plate 31, and the second return spring 3315 in the lower cleaning block 3311 pushes the lower cleaning piece 3317 to be in close contact with the bottom of the lowermost inclined heat conducting plate 31. During the reciprocating motion, the upper cleaning piece 3316 and the lower cleaning piece 3317 clean the top and bottom of the inclined heat conducting plate 31 to ensure that there is no accumulated water on the surface of the entire inclined heat conducting plate 31 and maintain a good dehumidification effect.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power distribution cabinet for a coal mine shaft, characterized in that, Including: Cabinet body (1), and a plurality of support legs (2) are fixedly connected to the bottom end of the cabinet body (1); Internal cabinet dehumidification mechanism (3), the internal cabinet dehumidification mechanism (3) includes a plurality of inclined heat conduction plates (31) fixedly connected to the inner walls of two opposite sides of the cabinet body (1), ventilation hoods (32) are fixedly connected to the outer walls of two opposite sides of the cabinet body (1), and the other ends of the inclined heat conduction plates (31) extend into the ventilation hoods (32), cleaning assemblies (33) are arranged at the upper and lower ends of the inclined heat conduction plates (31), and the cleaning assemblies (33) are used for cleaning the water droplets on the inclined heat conduction plates (31); External cabinet dehumidification mechanism (4), the external cabinet dehumidification mechanism (4) includes an air outlet (41) opened at the bottom end of the cabinet body (1), a dehumidification hood (42) is fixedly connected to the bottom end of the air outlet (41), the bottom of the dehumidification hood (42) is inclined, a semiconductor refrigeration plate (43) is fixedly connected to the bottom end of the dehumidification hood (42), a plurality of shunt heat conduction plates (44) are fixedly connected to the top end of the semiconductor refrigeration plate (43), and the external cabinet dehumidification mechanism (4) further includes a detection assembly (45) for detecting the humidity inside the cabinet.

2. The distribution cabinet for coal mine shafts according to claim 1, wherein, The external cabinet dehumidification mechanism (4) further includes an exhaust fan (46) arranged at the air outlet (41), a wind guide plate (47) is arranged inside the air outlet (41), and the wind guide plate (47) is located below the exhaust fan (46), a drain pipe (313) is fixedly communicated with the inner wall of the dehumidification hood (42), and the drain pipe (313) extends to the outside of the dehumidification hood (42), and the communication direction of the drain pipe (313) is the low part of the dehumidification hood (42), and the exhaust fan (46) and the semiconductor refrigeration plate (43) are electrically connected to a PLC controller to form an external cabinet dehumidification circuit.

3. The distribution cabinet for coal mine shafts according to claim 2, characterized in that, The detection assembly (45) includes a detection box (451) fixedly connected to the bottom end of the cabinet body (1), the other end of the drain pipe (313) penetrates through the inner wall of the detection box (451) and is fixedly communicated with a three-way pipe (452), the drain pipe (313) and the three-way pipe (452) are inclined from the dehumidification hood (42) towards the detection box (451), one of the outlets of the three-way pipe (452) is inside the detection box (451), the other outlet of the three-way pipe (452) penetrates through the detection box (451) and extends to the outside of the detection box (451), and first solenoid valves are arranged at both outlets of the three-way pipe (452).

4. The power distribution cabinet for a coal mine shaft according to claim 3, characterized in that, A pressing plate (453) is slidably connected to the inner wall of the detection box (451). A resistance plate is embedded in the inner wall of the detection box (451). The bottom end of the pressing plate (453) is fixedly connected to an L-shaped energizing plate (454) that is slidably connected to the resistance plate. The pressing plate (453) and the inner bottom wall of the detection box (451) are jointly fixedly connected with two symmetrically arranged detection springs (455). The L-shaped energizing plate (454), the resistance plate and the PLC controller are electrically connected to form a detection circuit. The L-shaped energizing plate (454) and the resistance plate form a sliding rheostat. During the downward sliding process of the L-shaped energizing plate (454) on the resistance plate, the resistance of the sliding rheostat in the detection circuit gradually decreases. An air vent (456) is opened at the bottom end of the detection box (451). The top end of the pressing plate (453) is fixedly communicated with a flexible pipe (457), and the other end of the flexible pipe (457) penetrates through the bottom of the detection box (451). A second solenoid valve is arranged inside the flexible pipe (457).

5. The distribution cabinet for coal mine shafts according to claim 4, characterized in that, The cabinet internal dehumidification mechanism (3) further includes an exhaust fan (34) fixedly connected to the inner wall of the air outlet (41). The air outlet (41) of the exhaust fan (34) is communicated with the inside of the dehumidification cover (42). Two symmetrically arranged exhaust pumps (35) are fixedly connected to the outer wall of the cabinet body (1). The output end of the exhaust pump (35) is fixedly connected to an exhaust pipe (36). The other end of the exhaust pipe (36) is communicated with the inside of the dehumidification cover (42). The output end of the exhaust pump (35) is fixedly communicated with an exhaust duct (37). The two exhaust ducts (37) are respectively communicated with the two ventilation covers (32). An air inlet (38) is opened on the outer wall of the cabinet body (1). A blower (39) is arranged inside the air inlet (38). An air collecting cover (310) is fixedly connected to the outer wall of the air inlet (38). Connection pipes (311) are arranged between the air collecting cover (310) and the two ventilation covers (32). The PLC controller is electrically connected to the exhaust pump (35), the first solenoid valve, the second solenoid valve, the exhaust pump (35), the blower (39), the exhaust fan (34), and the exhaust fan (46) to form a control circuit.

6. The distribution cabinet for a coal mine shaft according to claim 5, wherein, The cleaning component (33) includes two symmetrically arranged motors (331) fixedly connected to the outer wall of the cabinet body (1). Two symmetrically arranged fixing plates (332) are fixedly connected to the inner wall of the cabinet body (1). The output end of the motor (331) is fixedly connected with a reciprocating screw rod (333). A limiting rod (334) is fixedly connected between the cabinet body (1) and the fixing plate (332). A reciprocating rod (335) is sleeved on the outer wall of the reciprocating screw rod (333), and the limiting rod (334) slidably penetrates through the reciprocating rod (335). A sliding groove (336) is formed on the outer wall of the reciprocating rod (335) facing the inclined heat conducting plate (31). A plurality of sliding blocks (337) are fixedly connected to the inner wall of the sliding groove (336). A cleaning plate (338) is fixedly connected to the outer wall of the sliding block (337). The upper and lower ends of the cleaning plate (338) are respectively in sliding contact with the opposite sides of the adjacent two inclined heat conducting plates (31).

7. The distribution cabinet for coal mine shafts according to claim 6, characterized in that, Connection blocks (339) are fixedly connected to both the position near the top and the position near the bottom of the reciprocating rod (335). An upper cleaning block (3310) is fixedly connected to the outer wall of the upper connection block (339). A lower cleaning block (3311) is fixedly connected to the outer wall of the lower connection block (339). An upper moving groove (3312) is formed at the bottom end of the upper cleaning block (3310). A lower moving groove (3313) is formed at the bottom end of the lower cleaning block (3311). A first return spring (3314) is fixedly connected to the inner top wall of the upper moving groove (3312). A second return spring (3315) is fixedly connected to the inner bottom wall of the lower moving groove (3313). The other end of the first return spring (3314) is fixedly connected to an upper cleaning piece (3316). The upper cleaning piece (3316) is in sliding contact with the top end of the uppermost inclined heat conducting plate (31). The other end of the second return spring (3315) is fixedly connected to a lower cleaning piece (3317). The lower cleaning piece (3317) is in sliding contact with the bottom end of the lowermost inclined heat conducting plate (31).

8. A power distribution cabinet for a coal mine shaft according to claim 7, wherein, Two symmetrically arranged water collecting frames (312) are fixedly connected to the inner wall of the cabinet body (1), and the water collecting frames (312) are located at the lowest positions of the two inclined heat conducting plates (31) on both sides. A water collecting groove is formed at the bottom end of the water collecting frame (312). A water outlet pipe (48) is fixedly communicated with the bottom end of the water collecting groove, and the other end of the water outlet pipe (48) extends to the outside of the cabinet body (1). A one-way valve is arranged in the water outlet pipe (48).

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