Ventilation and dust removal device for coal mine operation

Abstract

The invention relates to the technical field of coal mine ventilation equipment, in particular to a coal mine operation ventilation and dust removal device which comprises a machine shell, a filtering mechanism and a ventilation and dust removal mechanism. The filtering mechanism comprises a filtering net plate, a hollow tray, a cleaning assembly and a plurality of groups of spraying assemblies; the filter screen plate is rotationally connected with the hollow tray, the filter screen plate and the hollow tray are concentrically arranged, and a retention gap is reserved between the filter screen plate and the hollow tray; the cleaning assembly comprises cleaning brushes distributed on the two opposite sides of the filter screen plate, the cleaning brushes are installed on the inner side wall of the hollow tray, the cleaning brushes are located in the retention gaps, and the cleaning brushes make contact with the surface of the filter screen plate. The spraying assembly is mounted on the hollow tray; the ventilation and dust reduction mechanism is mounted at the discharging end of the machine shell; and dust can be preliminarily filtered in the dust pumping and discharging dust falling process in the coal mine operation environment through the filtering mechanism, meanwhile, the surface of the filtering net plate can be conveniently cleaned, the cleanliness of the surface of the filtering net plate is improved, and then the ventilation effect of coal mine operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of coal mine ventilation equipment, and in particular to a ventilation and dust removal device for coal mine operations. Background Art

[0002] Coal mines are areas where coal resources are mined in coal-rich mining areas. Coal mines include underground coal mines and open-pit coal mines. Underground coal mines mine coal by digging tunnels underground. During the underground coal mining process, a large amount of fine dust will be generated in the tunnels due to rock drilling, blasting, and loading and unloading of ore, which seriously endangers the health and life safety of workers. Therefore, a ventilation and dust removal system is needed to improve the safety of the mining area.

[0003] The coal mine operation ventilation and dust removal device in the prior art includes a casing, a filter screen, a first drive, a fan blade, a mounting frame and a second drive. The casing is provided with a dust removal chamber, and the casing is provided with an air inlet and an air outlet connected to the dust removal chamber; the first drive is located in the dust removal chamber, and the first drive is connected to the fan blade in a transmission manner, and the fan blade is arranged near the air outlet; the mounting frame is connected to the first drive and is pivotally mounted in the dust removal chamber together with the fan blade; the second drive is mounted on the casing and is connected to the mounting frame in a transmission manner; a filter screen is provided near at least one of the air inlet and the air outlet, and the filter screen is mounted in the dust removal chamber.

[0004] During the long-term use of the above-mentioned ventilation and dust removal device for coal mine operations, a large amount of dust and impurities adhere to the filter screen under the action of the fan blades, causing the filter screen to be easily blocked, thus affecting the ventilation effect of the coal mine operations. Summary of the invention

[0005] In order to improve the ventilation effect of coal mine operations, the present application provides a ventilation and dust removal device for coal mine operations.

[0006] The present application provides a ventilation and dust removal device for coal mine operations, which adopts the following technical solution: A ventilation and dust removal device for coal mine operation, comprising a housing, a filtering mechanism and a ventilation and dust reduction mechanism; The filtering mechanism includes a filter screen plate, a hollow tray, a cleaning component and multiple groups of spray components; The hollow tray is arranged in a semicircular shape, and the hollow tray is fixedly connected to the casing; The filter screen plate is rotatably connected to the hollow tray, and the filter screen plate and the hollow tray are concentrically arranged, and a retention gap is left between the filter screen plate and the hollow tray; The cleaning assembly comprises cleaning brushes distributed on opposite sides of the filter screen plate, the cleaning brushes are mounted on the inner side wall of the hollow tray, and the cleaning brushes are located in the retention gap, and the cleaning brushes are in contact with the surface of the filter screen plate; The spray assembly is installed on the hollow tray, and the spray assembly is used for spraying and cleaning the filter mesh plate; The ventilation and dust reduction mechanism is installed at the discharge end of the casing, and the ventilation and dust reduction mechanism is used for exhausting and reducing the dust in the inner cavity of the casing.

[0007] By adopting the above technical solutions, first, the staff transports the coal mine operation ventilation and dust removal device to the coal mine operation environment and moves the coal mine operation ventilation and dust removal device to a suitable position. Then, the ventilation and dust reduction mechanism is adjusted. The dust is preliminarily filtered through the filter mesh plate and then enters the inner cavity of the casing through the filter mesh plate. The ventilation and dust reduction mechanism exhausts and reduces the dust in the coal mine operation environment; when the coal mine operation ventilation and dust removal device operates for a long time, the dust adheres to the surface of the filter mesh plate. The staff rotates the filter mesh plate. Since the filter mesh plate is in contact with the surface of the cleaning brush, the cleaning brush cleans the dust adhering to the surface of the filter mesh plate. At the same time, the spray assembly sprays and cleans the filter mesh plate to achieve the cleaning of the surface of the filter mesh plate; the designed coal mine operation ventilation and dust removal device facilitates the preliminary filtration of the dust during the process of exhausting and reducing the dust in the coal mine operation environment through the filtering mechanism. At the same time, it is convenient to clean the surface of the filter mesh plate, improve the cleanliness of the surface of the filter mesh plate, and further improve the ventilation and air change effect of the coal mine operation.

[0008] Optionally, multiple groups of the spray assemblies are symmetrically distributed on the opposite sides of the filter mesh plate. The spray assembly is installed on the inner side wall of the hollow tray. The spray assembly includes a spray pipe, a high-pressure spray pump, and a nozzle. The nozzle is installed on the hollow tray. One end of the spray pipe is connected to the nozzle, and the other end extends out of the hollow tray. The high-pressure spray pump is installed on the spray pipe.

[0009] By adopting the above technical solutions, the spray pipe is connected to a water source, and the high-pressure spray pump is adjusted. Under the action of the high-pressure spray pump, the cleaning water flows into the inner cavity of the spray pipe and then flows along the spray pipe to the position of the nozzle. The nozzle sprays and cleans the dust adhering to the surface of the filter mesh plate; the designed spray assembly facilitates the spraying and cleaning of the dust adhering to the surface of the filter mesh plate, reduces the adhesion of the dust on the surface of the filter mesh plate, ensures the cleanliness of the surface of the filter mesh plate, and further ensures the filtering effect of the filter mesh plate.

[0010] Optionally, the spray assembly further includes a return tank, a drain pipe, and a valve; One end of the drain pipe is installed on the hollow tray, and the other end is installed on the return tank, and the retention gap communicates with the inner cavity of the return tank through the drain pipe; The return tank is installed on the casing; The valve is installed on the drain pipe.

[0011] By adopting the above technical solution, after the filter screen plate is cleaned, the valve is adjusted, and the waste water after cleaning the filter screen plate flows into the reflux tank along the drain pipe, completely discharging the waste liquid in the inner cavity of the hollow tray; the designed spraying component is convenient for spraying and cleaning the dust adhered to the surface of the filter screen plate, reducing the adhesion of dust on the surface of the filter screen plate, ensuring the cleanliness of the surface of the filter screen plate, and further ensuring the filtering effect of the filter screen plate. At the same time, it is convenient for centralized collection of the waste liquid in the inner cavity of the hollow tray, reducing the pollution of the waste liquid to the coal mine operation area.

[0012] Optionally, the spraying component further includes a sponge filter plate, the sponge filter plate is detachably and fixedly connected to the reflux tank, and the reflux tank is divided into an upper partition cavity and a lower partition cavity by the sponge filter plate. The inner cavity of the drain pipe is communicated with the upper partition cavity, the input end of the spray pipe is installed on the reflux tank, and the input end of the spray pipe is communicated with the lower partition cavity.

[0013] By adopting the above technical solution, the spray pipe is connected to a water source, the high-pressure spray pump is adjusted, under the action of the high-pressure spray pump, the cleaning water flows into the inner cavity of the spray pipe, then flows along the spray pipe to the nozzle position, and the dust adhered to the surface of the filter screen plate is sprayed and cleaned through the nozzle. Then the valve is adjusted, and the waste water after cleaning the filter screen plate flows into the upper partition cavity along the drain pipe, completely discharging the waste liquid in the inner cavity of the hollow tray into the upper partition cavity. Under the action of the sponge filter plate, the dust in the waste liquid is filtered above the sponge filter plate, and the filtered waste liquid flows into the lower partition cavity. The filtered waste liquid flowing into the lower partition cavity flows into the inner cavity of the spray pipe under the action of the high-pressure spray pump, realizing the reuse of the cleaning water; the designed spraying component is convenient for spraying and cleaning the dust adhered to the surface of the filter screen plate, and is also convenient for centralized collection of the waste liquid in the inner cavity of the hollow tray, ensuring the filtering effect of the filter screen plate. At the same time, the reuse of the cleaning water is realized, improving the utilization rate of the cleaning water.

[0014] Optionally, the input end of the drain pipe is connected to the lowest position of the hollow tray.

[0015] By adopting the above technical solution, the input end of the drain pipe is connected to the lowest position of the hollow tray, which is convenient for completely discharging the waste liquid in the inner cavity of the hollow tray and preventing the waste liquid from accumulating in the inner cavity of the hollow tray.

[0016] Optionally, the cleaning brush includes a telescopic part and a cleaning part. One side of the telescopic part is fixedly connected to the inner side wall of the hollow tray, the other side of the telescopic part is fixedly connected to the cleaning part, the cleaning part is in contact with the surface of the filter screen plate, and the telescopic part drives the cleaning part to move towards the filter screen plate side.

[0017] By adopting the above technical solution, the designed cleaning brush can apply force to the cleaning part through the telescopic part, making the cleaning part move towards the side of the filter screen plate, ensuring full contact between the cleaning part and the filter screen plate, and thus ensuring the cleaning effect of the filter screen plate.

[0018] Optionally, a sealing rubber plate is provided at the open end of the hollow tray, and the sealing rubber plate is attached to the surface of the filter screen plate.

[0019] By adopting the above technical solution, the designed sealing rubber plate can facilitate the sealing of the open end of the hollow tray, preventing liquid from splashing outside the hollow tray during the spraying process of the filter screen plate.

[0020] Optionally, the ventilation and dust reduction mechanism includes an exhaust fan blade, a rotating shaft, a motor, and a linkage assembly; The motor is coaxially installed on the machine shell, and the output shaft of the motor is coaxially connected to the rotating shaft; One end of the rotating shaft extends into the inner cavity of the machine shell, and the rotating shaft is rotatably connected to the machine shell; The exhaust fan blade is coaxially installed on the rotating shaft, and the exhaust fan blade is located in the inner cavity of the machine shell; The rotating shaft is connected to the filter screen plate through the linkage assembly.

[0021] By adopting the above technical solution, adjusting the motor, the output shaft of the motor drives the rotating shaft to rotate, the rotating shaft drives the exhaust fan blade to rotate, exhausting the dust in the coal mining operation area, so that the dust flows along the inner cavity of the machine shell to the discharge port of the machine shell; the designed ventilation and dust reduction mechanism can facilitate the exhaust of dust in the coal mining operation area, reduce the dust content in the coal mining operation area, ensure the cleanliness of the coal mining operation area, and improve the safety performance during the coal mining operation.

[0022] Optionally, a dust reduction cloth bag is detachably installed at the discharge port of the machine shell.

[0023] By adopting the above technical solution, the designed dust reduction cloth bag can facilitate the centralized collection of dust in the coal mining operation area.

[0024] Optionally, the linkage assembly includes an adapter sleeve, a plurality of springs, and a plurality of limit blocks; The adapter sleeve is coaxially fixed on the filter screen plate, and the adapter sleeve is rotatably connected to the hollow tray; A plurality of sliding holes for the limit blocks to slide are formed on the rotating shaft, the plurality of sliding holes are distributed along the circumferential direction of the rotating shaft, and the sliding holes are arranged along the radial direction of the rotating shaft; The end of the rotating shaft extends into the inner cavity of the adapter sleeve, and the rotating shaft is rotatably connected to the adapter sleeve. A limiting groove for inserting the limiting block is formed on the inner side wall of the adapter sleeve; The spring is installed in the sliding hole, and one end of the spring is connected to the rotating shaft and the other end is connected to the limiting block; The spring includes a first state and a second state; In the first state, the spring is in a natural state, the limiting block is located in the sliding hole, and the rotating shaft rotates relative to the adapter sleeve; In the second state, the spring is in a stretched state, the limiting block extends into the limiting groove, and the rotating shaft and the adapter sleeve rotate synchronously.

[0025] By adopting the above technical solution, the motor is adjusted. The output shaft of the motor drives the rotating shaft to rotate, and the rotating shaft drives the exhaust fan blade to rotate to exhaust the dust in the coal mine operation area, so that the dust flows along the inner cavity of the machine shell to the dust reduction cloth bag, realizing the centralized collection of dust in the coal mine operation area. At the same time, when the rotating speed of the rotating shaft is low, the centrifugal force of the limiting block is not greater than the elastic force of the spring, and the limiting block is located in the sliding hole, the rotating shaft rotates along the adapter sleeve, and the adapter sleeve supports the end of the rotating shaft. At this time, the adapter sleeve does not rotate and the filter screen plate is fixed in position; when the rotating speed of the rotating shaft is high, the centrifugal force of the limiting block is greater than the sum of the elastic force of the spring and the friction force between the limiting block and the hole wall of the sliding hole, the limiting block overcomes the friction force between the limiting block and the hole wall of the sliding hole, and the limiting block slides along the sliding hole until the limiting block extends out of the rotating shaft and extends into the inner cavity of the limiting groove. At this time, since the limiting block extends into the limiting groove, the rotating shaft drives the adapter sleeve to rotate, and the adapter sleeve drives the filter screen plate to rotate, realizing the driving of the filter screen plate; the designed linkage component facilitates the realization of the linkage between the filter screen plate and the exhaust fan blade by adjusting the rotating speed of the motor. When the filter screen plate needs to be cleaned, the rotating speed of the motor is adjusted until the centrifugal force of the limiting block is greater than the sum of the elastic force of the spring and the friction force between the limiting block and the hole wall of the sliding hole, realizing the rotation of the filter screen plate, and thus realizing the automatic cleaning of the filter screen plate.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The designed coal mine operation ventilation and dust removal device facilitates the preliminary filtration of dust during the process of exhausting and reducing dust in the coal mine operation environment through the filtering mechanism. At the same time, it is convenient to clean the surface of the filter screen plate and spray and clean the dust adhered to the surface of the filter screen plate, realizing the reuse of cleaning water, improving the cleanliness of the surface of the filter screen plate, and thus improving the ventilation and air change effect of coal mine operations; 2. The designed ventilation and dust removal device for coal mine operations is facilitated to achieve the linkage between the filter screen plate and the exhaust fan blades through a linkage component. When it is necessary to clean the filter screen plate, the motor speed is adjusted so that the centrifugal force of the limit block is greater than the sum of the elastic force of the spring and the frictional force between the limit block and the hole wall of the sliding hole, realizing the rotation of the filter screen plate and thus achieving the automatic cleaning of the filter screen plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. 6 is a schematic diagram of the overall structure of the ventilation and dust removal device for coal mine operations in Embodiment 1 of the present application; Figure 2 FIG. 9 is a cross-sectional view of the ventilation and dust removal device for coal mine operations in Embodiment 1 of the present application, aiming to illustrate the cleaning component; Figure 3 FIG. Figure 2 is an enlarged view of part A of Figure 4 FIG. 17 is a schematic diagram of the partial structure of the ventilation and dust removal device for coal mine operations in Embodiment 1 of the present application, aiming to illustrate the filtering mechanism; Figure 5 FIG. Figure 4 is a cross-sectional view of the filtering mechanism in the ventilation and dust removal device for coal mine operations in Embodiment 1 of the present application; Figure 6 FIG. 25 is a cross-sectional view of the ventilation and dust removal device for coal mine operations in Embodiment 1 of the present application, aiming to illustrate the linkage component; Figure 7 FIG. Figure 6 is an enlarged view of part B of

[0028] Description of the reference numerals: 1, base; 2, universal caster; 3, housing; 4, filtering mechanism; 41, hollow tray; 42, filter screen plate; 43, retention gap; 44, spraying component; 441, return tank; 4411, upper partition chamber; 4412, lower partition chamber; 442, sponge filter plate; 443, drain pipe; 444, valve; 445, spray pipe; 446, nozzle; 447, high-pressure spray pump; 45, cleaning component; 451, cleaning brush; 4511, telescopic part; 4512, cleaning part; 46, sealing rubber plate; 5, ventilation and dust reduction mechanism; 51, motor; 52, rotating shaft; 53, exhaust fan blade; 54, linkage component; 541, adapter sleeve; 542, limit groove; 543, sliding hole; 544, limit block; 545, spring; 55, dust reduction cloth bag. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following further elaborates on the present application Figures 1-7 in conjunction with the appended drawings.

[0030] The embodiments of the present application disclose a ventilation and dust removal device for coal mine operations.

[0031] Referring to Figure 1and Figure 2 , a ventilation and dust removal device for coal mine operations, comprising a casing 3, a base 1, universal casters 2, a filtering mechanism 4 and a ventilation and dust reduction mechanism 5. The casing 3 is installed on the base 1 by bolts, and the universal casters 2 are installed on the bottom wall of the base 1 to facilitate the staff to adjust the position of the ventilation and dust removal device for coal mine operations. Both the filtering mechanism 4 and the ventilation and dust reduction mechanism 5 are installed on the casing 3. Moreover, the filtering mechanism 4 is arranged near the feed end of the casing 3, and the ventilation and dust reduction mechanism 5 is arranged near the discharge end of the casing 3. Dust in the coal mine operation area enters the inner cavity of the casing 3 along the feed end of the casing 3, and then undergoes preliminary filtration of the dust in the coal mine operation area through the filtering mechanism 4, and then the dust is centrally collected by the ventilation and dust reduction mechanism 5 and discharged from the inner cavity of the casing 3.

[0032] Refer to Figure 2 and Figure 3 , the filtering mechanism 4 includes a filter mesh plate 42, a hollow tray 41, a cleaning assembly 45 and multiple spray assemblies 44; the hollow tray 41 is semicircularly arranged and fixedly connected to the casing 3. In this embodiment, the hollow tray 41 is welded to the casing 3, and moreover, the central axis of the hollow tray 41 is coaxially arranged with the central axis of the casing 3; the filter mesh plate 42 is rotatably connected to the hollow tray 41 and concentrically arranged with the hollow tray 41. A retention gap 43 is left between the filter mesh plate 42 and the hollow tray 41 to prevent contact between the filter mesh plate 42 and the hollow tray 41 and ensure the rotation of the filter mesh plate 42; a sealing rubber plate 46 is arranged at the open end of the hollow tray 41. In this embodiment, the sealing rubber plate 46 is bonded to the inner side wall of the hollow tray 41 and the surface of the sealing rubber plate 46 is in contact with the filter mesh plate 42 to facilitate the sealing of the open end of the hollow tray 41.

[0033] Refer to Figure 2 and Figure 3 , the cleaning assembly 45 includes cleaning brushes 451 distributed on opposite sides of the filter mesh plate 42. The cleaning brushes 451 are installed on the inner side wall of the hollow tray 41 and are located in the retention gap 43; the cleaning brushes 451 include a telescopic part 4511 and a cleaning part 4512. One side of the telescopic part 4511 is fixedly connected to the inner side wall of the hollow tray 41, and the other side of the telescopic part 4511 is fixedly connected to the cleaning part 4512. In this embodiment, the telescopic part 4511 includes a fixed section, a sliding section and multiple compression springs. The fixed section is hollow, and the sliding section is slidably connected to the fixed section. The multiple compression springs are uniformly distributed along the length direction of the sliding section, and one end of the compression spring is connected to the fixed section and the other end is connected to the sliding section. The compression spring drives the sliding section to move away from the fixed section, and the side of the sliding section away from the fixed section is fixedly connected to the cleaning part 4512; moreover, in this embodiment, the telescopic part 4511 drives the cleaning part 4512 to move towards the filter mesh plate 42 side, so that the cleaning brush 451 contacts the surface of the filter mesh plate 42, thereby realizing the cleaning of the surface of the filter mesh plate 42.

[0034] Referring to Figure 4 and Figure 5 As shown in and

[0034] , the spraying assembly 44 is installed on the hollow tray 41, and the spraying assembly 44 is used for spraying and cleaning the filter mesh plate 42. Multiple groups of spraying assemblies 44 are symmetrically distributed on the opposite sides of the filter mesh plate 42. The spraying assembly 44 is installed on the inner side wall of the hollow tray 41. The spraying assembly 44 includes a spray pipe 445, a high-pressure spray pump 447, a nozzle 446, a return box 441, a drain pipe 443, a valve 444, and a sponge filter plate 442. The return box 441 is installed on the casing 3. In this embodiment, the return box 441 is fixed to the casing 3 by bolts; the sponge filter plate 442 is detachably and fixedly connected to the return box 441. In this embodiment, the sponge filter plate 442 is snap-fitted and fixed to the return box 441, and the plane where the sponge filter plate 442 is located is parallel to the bottom wall plane of the return box 441. The return box 441 is separated into an upper partition chamber 4411 and a lower partition chamber 4412 by the sponge filter plate 442; one end of the drain pipe 443 is fixedly connected to the hollow tray 41, and the other end is fixedly connected to the return box 441. Moreover, the input end of the drain pipe 443 is connected to the lowest position of the hollow tray 41. In this embodiment, the retention gap 43 is communicated with the upper partition chamber 4411 through the drain pipe 443. The valve 444 is installed on the drain pipe 443; the nozzle 446 is installed on the hollow tray 41, and the nozzle 446 faces the side of the filter mesh plate 42. In this application, the nozzles 446 in multiple groups of spraying assemblies 44 located on one side of the filter mesh plate 42 are arc-shapedly distributed, so as to facilitate spraying and cleaning different positions of the filter mesh plate 42; one end of the spray pipe 445 is connected to the nozzle 446, and the other end extends out of the hollow tray 41 and is fixedly connected to the return box 441. The spray pipe 445 is communicated with the lower partition chamber 4412, and the high-pressure spray pump 447 is installed on the spray pipe 445.

[0035] Referring to Figure 6 and Figure 7, the ventilation and dust reduction mechanism 5 is installed at the discharge end of the casing 3, and the ventilation and dust reduction mechanism 5 is used for exhausting and reducing the dust in the inner cavity of the casing 3; the ventilation and dust reduction mechanism 5 includes a suction fan blade 53, a rotating shaft 52, a motor 51 and a linkage assembly 54; the motor 51 is coaxially installed on the casing 3. In this embodiment, the motor 51 is fixed on the casing 3 by bolts. The output shaft of the motor 51 is coaxially connected to the rotating shaft 52, and the output shaft of the motor 51 and the rotating shaft 52 are connected by a coupling. The motor 51 is located outside the casing 3 to reduce the adhesion of the dust in the inner cavity of the casing 3 to the surface of the motor 51; the rotating shaft 52 is rotatably connected to the casing 3, and one end of the rotating shaft 52 extends into the inner cavity of the casing 3. One end of the rotating shaft 52 extending into the inner cavity of the casing 3 is connected to the filter screen plate 42 through the linkage assembly 54 to facilitate the stable support of the end of the rotating shaft 52 away from the motor 51; the suction fan blade 53 is coaxially installed on the rotating shaft 52, and the suction fan blade 53 is located in the inner cavity of the casing 3. In this embodiment, the suction fan blade 53 is arranged close to the discharge port of the casing 3. Moreover, the suction fan blade 53 is sleeved on the rotating shaft 52, and the suction fan blade 53 is key-connected to the rotating shaft 52 to facilitate the coaxial rotation of the rotating shaft 52 and the suction fan blade 53. A dust reduction cloth bag 55 is detachably installed on the discharge port of the casing 3, and the discharge port of the casing 3 is located between the suction fan blade 53 and the motor 51 to facilitate the centralized recovery of the dust in the inner cavity of the casing 3 through the dust reduction cloth bag 55.

[0036] Refer to Figure 6 and Figure 7, the linkage assembly 54 includes a transfer sleeve 541, a plurality of springs 545 and a plurality of limit blocks 544. The transfer sleeve 541 is coaxially fixed on the filter screen plate 42, and the transfer sleeve 541 is rotatably connected to the hollow tray 41. One end of the transfer sleeve 541 extending out of the hollow tray 41 is sleeved on the rotating shaft 52, which is convenient for supporting the end of the rotating shaft 52 away from the motor 51 and extending the service life of the rotating shaft 52. In this embodiment, the transfer sleeve 541 and the rotating shaft 52 are coaxially arranged, and moreover, the rotating shaft 52 is rotatably connected to the transfer sleeve 541; a plurality of sliding holes 543 for the limit blocks 544 to slide are formed on the rotating shaft 52. In this embodiment, the number of the sliding holes 543, the springs 545 and the limit blocks 544 is the same. The sliding holes 543 are used to install the springs 545 and the limit blocks 544. Moreover, a limit groove 542 for the limit blocks 544 to be inserted is formed on the inner side wall of the transfer sleeve 541. In this application, the limit blocks 544 can be set to two, can be set to three, or can be set to four. As long as the limit blocks 544 can be inserted into the limit groove 542 to realize the synchronous rotation of the transfer sleeve 541 and the rotating shaft 52. In this embodiment, the limit blocks 544 are set to three, and the three limit blocks 544 are evenly distributed along the circumferential direction of the rotating shaft 52. Therefore, the sliding holes 543 and the springs 545 are both set to three, and the three sliding holes 543 are distributed along the circumferential direction of the rotating shaft 52, and each sliding hole 543 is arranged along the radial direction of the rotating shaft 52; in addition, in order to ensure that the limit blocks 544 extend out of the sliding holes 543 under the centrifugal force and are inserted into the limit groove 542, in this embodiment, the limit groove 542 is provided with three, and the three limit grooves 542 are evenly distributed along the circumferential direction of the transfer sleeve 541. Moreover, each limit groove 542 is arc-shaped, and the maximum diameter of the limit block 544 is D, the width of the limit groove 542 is A, and the length of the limit groove 542 is B, A>D, and B>3D, so as to facilitate the limit blocks 544 to be inserted into the limit groove 542 under the action of centrifugal force to realize the synchronous rotation of the transfer sleeve 541 and the rotating shaft 52; the springs 545 are installed in the sliding holes 543, and one end of the spring 545 is connected to the rotating shaft 52 and the other end is connected to the limit block 544; the spring 545 includes a first state and a second state; in the first state, the spring 545 is in a natural state, and the limit block 544 is located in the sliding hole 543, and the rotating shaft 52 and the transfer sleeve 541 rotate relatively; in the second state, the spring 545 is in a stretched state, and the limit block 544 extends into the limit groove 542, and the rotating shaft 52 and the transfer sleeve 541 rotate synchronously.

[0037] The implementation principle of the ventilation and dust removal device for coal mine operations in the embodiments of this application is as follows: First, the staff transports the ventilation and dust removal device for coal mine operations to the coal mine operation environment through the universal casters 2 and moves the device to a suitable position. Then, the motor 51 is adjusted. The output shaft of the motor 51 drives the rotating shaft 52 to rotate, and the rotating shaft 52 drives the exhaust fan blade 53 to rotate. Dust is preliminarily filtered through the filter mesh plate 42, enters the inner cavity of the housing 3 through the filter mesh plate 42, and flows along the inner cavity of the housing 3 to the dust reduction cloth bag 55, realizing the centralized collection of dust in the coal mine operation area; when the rotation speed of the rotating shaft 52 is low, the centrifugal force of the limit block 544 is not greater than the elastic force of the spring 545, and the limit block 544 is located in the sliding hole 543. The rotating shaft 52 can rotate along the adapter sleeve 541, and the adapter sleeve 541 supports the end of the rotating shaft 52. At this time, the adapter sleeve 541 does not rotate, and the position of the filter mesh plate 42 is fixed; when the rotation speed of the rotating shaft 52 is high, the centrifugal force of the limit block 544 is greater than the sum of the elastic force of the spring 545 and the friction force between the limit block 544 and the wall of the sliding hole 543. The limit block 544 overcomes the friction force between the limit block 544 and the wall of the sliding hole 543 and slides along the sliding hole 543 until the limit block 544 extends out of the rotating shaft 52 and extends into the inner cavity of the limit groove 542. At this time, since the limit block 544 extends into the limit groove 542, the rotating shaft 52 drives the adapter sleeve 541 to rotate, and the adapter sleeve 541 drives the filter mesh plate 42 to rotate. During the rotation of the filter mesh plate 42, it contacts the surface of the cleaning brush 451, and the cleaning brush 451 cleans the dust adhered to the surface of the filter mesh plate 42. At the same time, the high-pressure spray pump 447 is adjusted. Under the action of the high-pressure spray pump 447, the cleaning water in the lower partition chamber 4412 flows into the inner cavity of the spray pipe 445, and then flows along the spray pipe 445 to the position of the nozzle 446. The nozzle 446 sprays and cleans the dust adhered to the surface of the filter mesh plate 42. The valve 444 is adjusted, and the waste water after cleaning the filter mesh plate 42 flows into the upper partition chamber 4411 along the drain pipe 443. Under the action of the sponge filter plate 442, the dust in the waste liquid is filtered above the sponge filter plate 442, and the filtered waste liquid flows into the lower partition chamber 4412, realizing the reuse of cleaning water.

[0038] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A ventilation and dust removal device for coal mine operations, characterized in that, It includes a housing (3), a filtering mechanism (4), and a ventilation and dust reduction mechanism (5); The filtering mechanism (4) includes a filter mesh plate (42), a hollow tray (41), a cleaning component (45), and multiple groups of spraying components (44); The hollow tray (41) is arranged in a semi-circular shape, and the hollow tray (41) is fixedly connected to the housing (3); The filter mesh plate (42) is rotatably connected to the hollow tray (41), and the filter mesh plate (42) is concentric with the hollow tray (41). A retention gap (43) is left between the filter mesh plate (42) and the hollow tray (41); The cleaning component (45) includes cleaning brushes (451) distributed on opposite sides of the filter mesh plate (42). The cleaning brushes (451) are installed on the inner side wall of the hollow tray (41), and the cleaning brushes (451) are located in the retention gap (43), and the cleaning brushes (451) are in contact with the surface of the filter mesh plate (42); The spraying component (44) is installed on the hollow tray (41), and the spraying component (44) is used to spray and clean the filter mesh plate (42); The ventilation and dust reduction mechanism (5) is installed at the discharge end of the housing (3), and the ventilation and dust reduction mechanism (5) is used for exhausting and reducing dust in the inner cavity of the housing (3).

2. The coal mine operation ventilation and dust removal device according to claim 1, characterized in that: Multiple groups of the spraying components (44) are symmetrically distributed on opposite sides of the filter mesh plate (42). The spraying components (44) are installed on the inner side wall of the hollow tray (41). The spraying component (44) includes a spraying pipe (445), a high-pressure spraying pump (447), and a nozzle (446). The nozzle (446) is installed on the hollow tray (41). One end of the spraying pipe (445) is connected to the nozzle (446), and the other end extends out of the hollow tray (41). The high-pressure spraying pump (447) is installed on the spraying pipe (445).

3. The coal mine operation ventilation and dust removal device according to claim 2, characterized in that: The spraying component (44) further includes a reflux box (441), a drain pipe (443), and a valve (444); One end of the drain pipe (443) is installed on the hollow tray (41), and the other end is installed on the reflux box (441), and the retention gap (43) is communicated with the inner cavity of the reflux box (441) through the drain pipe (443); The reflux box (441) is installed on the housing (3); The valve (444) is installed on the drain pipe (443).

4. The coal mine operation ventilation and dust removal device according to claim 3, wherein: The spraying component (44) further includes a sponge filter plate (442). The sponge filter plate (442) is detachably and fixedly connected to the reflux box (441), and the reflux box (441) is separated into an upper partition chamber (4411) and a lower partition chamber (4412) by the sponge filter plate (442). The inner cavity of the drain pipe (443) is communicated with the upper partition chamber (4411). The input end of the spraying pipe (445) is installed on the reflux box (441), and the input end of the spraying pipe (445) is communicated with the lower partition chamber (4412).

5. The mine operation ventilation and dust removal device according to claim 3, wherein: The input end of the drain pipe (443) is connected to the lowest position of the hollow tray (41).

6. The coal mine operation ventilation and dust removal device according to claim 1, characterized in that: The cleaning brush (451) includes a telescopic part (4511) and a cleaning part (4512). One side of the telescopic part (4511) is fixedly connected to the inner wall of the hollow tray (41), the other side of the telescopic part (4511) is fixedly connected to the cleaning part (4512), the cleaning part (4512) is in contact with the surface of the filter screen plate (42), and the telescopic part (4511) drives the cleaning part (4512) to move towards the filter screen plate (42).

7. The ventilation and dust removal device for coal mine operations according to claim 1, wherein: A sealing rubber plate (46) is arranged at the open end of the hollow tray (41), and the sealing rubber plate (46) is attached to the surface of the filter screen plate (42).

8. The coal mine operation ventilation and dust removal device according to claim 1, characterized in that: The ventilation and dust reduction mechanism (5) includes an exhaust fan blade (53), a rotating shaft (52), a motor (51), and a linkage assembly (54); The motor (51) is coaxially installed on the machine shell (3), and the output shaft of the motor (51) is coaxially connected to the rotating shaft (52); One end of the rotating shaft (52) extends into the inner cavity of the machine shell (3), and the rotating shaft (52) is rotatably connected to the machine shell (3); The exhaust fan blade (53) is coaxially installed on the rotating shaft (52), and the exhaust fan blade (53) is located in the inner cavity of the machine shell (3); The rotating shaft (52) is connected to the filter screen plate (42) through the linkage assembly (54).

9. The coal mine operation ventilation and dust removal device according to claim 8, wherein: A dust reduction cloth bag (55) is detachably installed at the discharge port of the machine shell (3).

10. The coal mine operation ventilation and dust removal device according to claim 8, characterized in that: The linkage assembly (54) includes a transfer sleeve (541), a plurality of springs (545), and a plurality of limit blocks (544); The transfer sleeve (541) is coaxially fixed on the filter screen plate (42), and the transfer sleeve (541) is rotatably connected to the hollow tray (41); A plurality of sliding holes (543) for the limit blocks (544) to slide are formed on the rotating shaft (52). The plurality of sliding holes (543) are distributed along the circumferential direction of the rotating shaft (52), and the sliding holes (543) are arranged along the radial direction of the rotating shaft (52); The end of the rotating shaft (52) extends into the inner cavity of the transfer sleeve (541), and the rotating shaft (52) is rotatably connected to the transfer sleeve (541). A limit groove (542) for the limit block (544) to be inserted is formed on the inner side wall of the transfer sleeve (541); The spring (545) is installed in the sliding hole (543), and one end of the spring (545) is connected to the rotating shaft (52), and the other end is connected to the limit block (544); The spring (545) includes a first state and a second state; In the first state, the spring (545) is in a natural state, and the limit block (544) is located in the sliding hole (543), and the rotating shaft (52) and the transfer sleeve (541) rotate relative to each other; In the second state, the spring (545) is in a stretched state, and the limiting block (544) extends into the limiting groove (542), and the rotating shaft (52) rotates synchronously with the adapter sleeve (541).

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