Underground drainage device for coal mine

Abstract

The coal mine underground drainage device comprises a water storage tank, the top of the water storage tank is fixedly connected with a water inlet pipe, one side of the water storage tank is fixedly connected with an overflow pool, and the side, away from the overflow pool, of the water storage tank is connected with a mounting box; the mounting box comprises a water outlet pipe, one end of the water outlet pipe is connected with the reservoir, the inlet end of the water outlet pipe is fixedly connected with a filter screen cylinder, and the end, away from the water outlet pipe, of the filter screen cylinder is connected with a cleaning part; one end, far away from the reservoir, of the water outlet pipe is connected with a water pumping part; one end, far away from the water outlet pipe, of the water pumping part is connected with a transmission part; the other end of the transmission part is connected with the output end of the motor. The outer wall of the filter screen cylinder is cleaned through the cleaning piece, and the situation that too many impurities accumulate on the outer wall of the filter screen cylinder, and consequently filter holes of the filter screen cylinder are blocked is avoided.

Description

Technical Field

[0001] This application relates to the field of coal mine drainage equipment, and more particularly to a coal mine underground drainage device. Background Technology

[0002] In coal mining operations, drainage of mine water is a crucial aspect of ensuring safety and normal production. Rainfall, as one of the main sources of mine water, will accumulate underground if not drained in a timely manner, affecting production and safety, and potentially causing mine flooding accidents with serious personal injury and property damage. Rainfall in my country is concentrated in specific seasons, which can generate large amounts of underground water in a short period. To effectively cope with this situation, multiple drainage systems are usually installed and work in tandem, which undoubtedly increases the cost of underground drainage systems in coal mines.

[0003] To address this issue, existing coal mine underground drainage systems typically consist of an underground water storage tank, an emergency overflow tank, a drainage chute, a drainage pipe, a drainage pump, a filter tank, an overflow outlet, a return pipe, a return pump, and an inclined sedimentation pipe. A filter screen is used to filter the water inside the storage tank, preventing sediment and impurities from being discharged.

[0004] However, during the filtration process, some sediment will adhere to the outer wall of the filter screen. Over time, as the sediment accumulates, the filter pores of the screen will become clogged. This clogging will affect the normal drainage of the reservoir, thus impacting overall drainage efficiency and increasing potential safety risks. Utility Model Content

[0005] This application provides a coal mine underground drainage device to solve the problem of excessive impurities accumulating on the outer wall of the filter screen cylinder, causing the filter holes of the filter screen cylinder to become clogged.

[0006] This application provides a coal mine underground drainage device, including a water storage tank, an inlet pipe fixedly connected to the top of the water storage tank, an overflow tank fixedly connected to one side of the water storage tank, and an installation box connected to the side of the water storage tank away from the overflow tank.

[0007] The mounting box includes a water outlet pipe, one end of which is connected to the water storage tank. A filter screen is fixedly connected to the inlet end of the water outlet pipe, and a cleaning component is connected to the end of the filter screen away from the water outlet pipe. A pumping component is connected to the end of the water outlet pipe away from the water storage tank, and a transmission component is connected to the end of the pumping component away from the water outlet pipe. The other end of the transmission component is connected to the motor output end.

[0008] In one feasible implementation, the water storage tank has an overflow port that communicates with the inside of the water storage tank at the top of the side wall near the overflow tank, and a one-way valve that prevents the water storage tank from draining into the overflow tank is fixedly connected to the bottom. The one-way valve is connected to a return pipe at the end away from the overflow tank.

[0009] In one feasible implementation, the pumping component includes a pumping cylinder, one end of which is connected to the outlet end of the water outlet pipe. An axial flow impeller is rotatably connected inside the pumping cylinder. The end of the axial flow impeller away from the water outlet pipe is fixedly connected to the output shaft of the motor through the transmission component. A water guide pipe communicating with the inside of the pumping cylinder is fixedly connected to the top of the pumping cylinder.

[0010] In one feasible implementation, the cleaning component includes a rotating shaft that passes through the side wall of the water storage tank near the filter screen cylinder. A rotating plate is fixedly connected to the end of the rotating shaft away from the filter screen cylinder. A sliding rod is provided at the end of the rotating plate away from the rotating shaft. The sliding rod passes through the rotating plate and is slidably connected to the rotating plate.

[0011] A scraper is fixedly connected to one end of the slide rod near the filter cylinder, and the scraper abuts against the outer wall of the filter cylinder. A stop block is fixedly connected to the other end of the slide rod.

[0012] In one feasible implementation, the cleaning component further includes a spring, which is sleeved on the slide rod, with one end of the spring in close contact with the rotating plate and the other end of the spring in close contact with the scraper.

[0013] In one feasible implementation, a seal is provided at the connection between the rotating shaft and the side wall of the water storage tank.

[0014] In one feasible implementation, the transmission component includes a first gear connected to the end of the rotating shaft away from the rotating plate, the first gear meshing with a second gear, and one end of the second gear being fixedly connected to the output shaft of the motor.

[0015] In one feasible implementation, the axial flow impeller is connected to the motor output shaft via the second gear.

[0016] In one feasible implementation, the number of teeth on the first gear is greater than the number of teeth on the second gear.

[0017] In one feasible implementation, the bottom of the water storage tank is V-shaped.

[0018] This application provides an underground drainage device for coal mines. By starting a motor, a pumping component begins operation. The pumping component draws water from a storage tank through an outlet pipe. As the water passes through the outlet pipe, a filter screen intercepts sediment and impurities, ensuring relatively pure discharged water. Simultaneously, the motor drives a transmission component. This transmission component, via gears, rotates a cleaning component. During rotation, scrapers and other parts on the cleaning component adhere closely to the outer wall of the filter screen, removing impurities adsorbed on its surface. Regular or continuous cleaning effectively prevents excessive accumulation of impurities on the outer wall of the filter screen, thus preventing filter clogging and ensuring the continuity and efficiency of the drainage process. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a coal mine underground drainage device provided in this application;

[0020] Figure 2 This is a schematic diagram of the structure of the pumping component of this utility model;

[0021] Figure 3 This is a schematic diagram of the cleaning component of this utility model;

[0022] Figure 4 This is a schematic diagram of the transmission component of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1-Water storage tank; 2-Inlet pipe; 3-Outlet pipe; 4-Filter screen cylinder; 5-Mounting box; 6-Motor; 7-Pumping component; 71-Pumping cylinder; 72-Axial flow impeller; 73-Water guide pipe; 8-Cleaning component; 81-Rotating shaft; 82-Rotating plate; 83-Slide rod; 84-Scraper; 85-Block; 86-Spring; 9-Transmission component; 91-First gear; 92-Second gear; 10-Overflow tank; 101-Overflow port; 102-Return pipe; 103-One-way valve. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of this application.

[0026] In existing technologies, water in a reservoir is filtered using a filter screen. The main purpose is to prevent sediment and impurities from being discharged. However, during the filtration process, some sediment adheres to the outer wall of the filter screen. As the sediment accumulates, the filter holes become clogged, affecting the normal drainage of the reservoir. Therefore, this application proposes a coal mine underground drainage device to solve the above problems. The specific structure of the coal mine underground drainage device provided in this application is described in detail below with reference to the accompanying drawings.

[0027] Reference Figure 1 As shown in the figure, this application embodiment provides a coal mine underground drainage device, including a water storage tank 1. A water inlet pipe 2 is fixedly connected to the top of the water storage tank 1 to guide accumulated water from inside the mine into the water storage tank 1, ensuring that the accumulated water inside the mine can be collected quickly and effectively, preparing for subsequent drainage treatment. An overflow tank 10 is fixedly connected to one side of the water storage tank 1, serving as an emergency drainage channel when the water level in the water storage tank 1 is too high, directing excess water to the overflow tank 10 to prevent overloading of the water storage tank 1. An installation box 5 is connected to the side of the water storage tank 1 away from the overflow tank 10. The installation box 5 integrates the main components of the drainage device, simplifying the installation process and improving the system's compactness.

[0028] The mounting box 5 includes a water outlet pipe 3, one end of which is connected to the water storage tank 1. A filter screen cylinder 4 is fixedly connected to the inlet end of the water outlet pipe 3. Water from the water storage tank 1 is introduced into the water outlet pipe 3 while impurities in the water are filtered out by the filter screen cylinder 4. A cleaning component 8 is connected to the end of the filter screen cylinder 4 away from the water outlet pipe 3. The filter screen cylinder 4 prevents impurities from entering the water outlet pipe 3, maintaining water quality cleanliness, and the cleaning component 8 removes impurities adhering to the outer wall of the filter screen cylinder 4, preventing blockage. A pumping component 7 is connected to the end of the water outlet pipe 3 away from the water storage tank 1, pumping the filtered water out of the water storage tank 1 to achieve drainage. A transmission component 9 is connected to the end of the pumping component 7 away from the water outlet pipe 3; the other end of the transmission component 9 is connected to the output end of a motor 6. The motor 6 drives the transmission component 9 to rotate, thereby driving the pumping component 7 and the cleaning component 8. Starting the motor 6 drives the pumping component 7 and the cleaning component 8, achieving drainage and automatic cleaning of the filter screen cylinder 4.

[0029] This application provides an underground drainage device for coal mines. By starting a motor 6, a pumping component 7 is activated. The pumping component 7 draws water from the storage tank 1 through an outlet pipe 3. During the water's passage through the outlet pipe 3, a filter screen 4 intercepts sediment and impurities, ensuring relatively pure discharged water. Simultaneously, the motor 6 drives a transmission component 9. The transmission component 9 rotates a cleaning component 8. During rotation, the cleaning component 8 adheres closely to the outer wall of the filter screen 4, removing impurities adsorbed on its surface. Regular or continuous cleaning effectively prevents excessive accumulation of impurities on the outer wall of the filter screen, thus preventing filter pore blockage and ensuring the continuity and efficiency of the drainage process. Automatic cleaning of the filter screen 4 reduces the frequency of manual cleaning, improving the overall efficiency of the drainage system. It also reduces the number of manual maintenance operations required due to filter screen 4 blockage, lowering maintenance costs. Ensuring unobstructed flow to the filter screen 4 enhances the stability and reliability of the drainage system.

[0030] Reference Figure 1 As shown, in some embodiments, the top of the side wall of the water storage tank 1 near the overflow tank 10 has an overflow port 101 communicating with the interior of the water storage tank 1. When the water level in the water storage tank 1 reaches a certain height, excess water can flow into the overflow tank 10 through the overflow port 101, preventing the water storage tank 1 from being overloaded. A one-way valve 103 is fixedly connected to the bottom to prevent the water storage tank 1 from draining into the overflow tank 10. The end of the one-way valve 103 away from the overflow tank 10 is connected to a return pipe 102. When it is necessary to return water from the overflow tank 10 to the water storage tank 1, this can be achieved through the return pipe 102. At this time, the one-way valve 103 allows water to flow back from the overflow tank 10 to the water storage tank 1.

[0031] When the water level in the reservoir 1 exceeds the height of the overflow port 101, the excess water flows into the overflow tank 10 through the overflow port 101. When it is necessary to return the water in the overflow tank 10 to the reservoir 1, this can be achieved through the return pipe 102. At this time, the one-way valve 103 allows the water to flow back from the overflow tank 10 to the reservoir 1.

[0032] The combined use of overflow port 101 and one-way valve 103 effectively prevents the water level in reservoir 1 from becoming too high, ensuring the safety of the underground drainage system. The design of one-way valve 103 and return pipe 102 allows water in overflow pool 10 to be returned to reservoir 1 when necessary, improving the flexibility of the drainage system. The design of one-way valve 103 reduces unnecessary water circulation, lowering system energy consumption and maintenance costs. Through reasonable water flow control, water resources within the mine can be better managed, improving drainage efficiency.

[0033] Reference Figure 2As shown, in some embodiments, the pumping component 7 includes a pumping cylinder 71. One end of the pumping cylinder 71 is connected to the outlet end of the outlet pipe 3. An axial flow impeller 72 is rotatably connected inside the pumping cylinder 71. When the axial flow impeller 72 rotates at high speed, it can create a negative pressure inside the pumping cylinder 71, thereby drawing water from the water storage tank 1 into the pumping cylinder 71 through the outlet pipe 3. The end of the axial flow impeller 72 away from the outlet pipe 3 is fixedly connected to the output shaft of the motor 6 through the transmission component 9. When the motor 6 starts, the rotational power of the motor 6 is transmitted to the axial flow impeller 72 through the transmission component 9. The axial flow impeller 72 then rotates at high speed, generating suction and drawing water from the outlet pipe 3 into the pumping cylinder 71. A water guide pipe 73 communicating with the inside of the pumping cylinder 71 is fixedly connected to the top of the pumping cylinder 71. The water guide pipe 73 guides the water inside the pumping cylinder 71 to the outside, completing the drainage process.

[0034] After the motor starts, the axial impeller 72 is driven to rotate via the transmission component 9. The rotation of the axial impeller 72 causes air to be expelled from the pumping cylinder 71, creating a negative pressure zone. Under this negative pressure, water from the storage tank 1 is drawn into the pumping cylinder 71 through the outlet pipe 3. The water is then pushed to the top of the pumping cylinder 71 by the axial impeller 72 and discharged through the guide pipe 73. The high-speed rotation of the axial impeller 72 driven by the motor 6 accelerates the drainage of accumulated water and improves drainage efficiency. The design of the axial impeller 72 effectively utilizes the power of the motor 6, reducing energy loss and lowering energy consumption.

[0035] Reference Figure 1 and Figure 3As shown, in some embodiments, the cleaning component 8 includes a rotating shaft 81 that penetrates the side wall of the water storage tank 1 near the filter cylinder 4. A rotating plate 82 is fixedly connected to the end of the rotating shaft 81 away from the filter cylinder 4. The rotating shaft 81 serves as the rotation center of the rotating plate 82, ensuring that the rotating plate 82 can rotate around the rotating shaft 81. A sliding rod 83 is provided at the end of the rotating plate 82 away from the rotating shaft 81. The sliding rod 83 penetrates the rotating plate 82 and is slidably connected to it. The sliding rod 83 can slide on the rotating plate 82, allowing the scraper 84 to move along the outer wall of the filter cylinder 4 as the rotating plate 82 rotates. A scraper 84 is fixedly connected to the end of the sliding rod 83 near the filter cylinder 4. The scraper 84 abuts against the outer wall of the filter cylinder 4. As the sliding rod 83 moves, the scraper 84 adheres tightly to the outer wall of the filter cylinder 4, removing impurities attached to the outer wall of the filter cylinder 4. A stop 85 is fixedly connected to the other end of the slide rod 83. The stop 85 serves as a limit to prevent the slide rod 83 from slipping out of the rotating plate 82. After the motor starts, it drives the rotating shaft 81 to rotate via the transmission component 9. The rotation of the rotating shaft 81 drives the rotating plate 82 to rotate as well. The rotation of the rotating plate 82 causes the slide rod 83 to move in a circular motion on the rotating plate 82. The circular motion of the slide rod 83 causes the scraper 84 to adhere tightly to the outer wall of the filter cylinder 4 and move in a circular motion along the outer wall of the filter cylinder 4. As the slide rod 83 moves, the scraper 84 adheres tightly to the outer wall of the filter cylinder 4, removing impurities attached to the outer wall of the filter cylinder 4. The stop 85 serves as a limit to prevent the slide rod 83 from slipping out of the rotating plate 82. Through the circular motion of the scraper 84, impurities attached to the outer wall of the filter cylinder 4 can be effectively removed, avoiding clogging of the filter holes. Through the cleaning by the scraper 84, clogging of the filter holes of the filter cylinder 4 is effectively avoided, ensuring the continuity and efficiency of the drainage process. This reduces the frequency of manual maintenance required due to clogging of the filter cylinder 4, lowering maintenance costs. It ensures unobstructed flow to the filter cylinder 4, enhancing the stability and reliability of the drainage system. It also reduces additional pressure and wear caused by clogging, helping to extend the service life of the drainage equipment.

[0036] Reference Figure 1 and Figure 3 As shown, in some embodiments, the cleaning component 8 further includes a spring 86, which is sleeved on the slide rod 83. One end of the spring 86 is in close contact with the rotating plate 82, and the other end is in close contact with the scraper 84. The spring 86 provides elasticity, ensuring that the scraper 84 always remains in close contact with the outer wall of the filter cylinder 4, so as to effectively clean even when impurities accumulate on the outer wall of the filter cylinder 4.

[0037] The elastic force provided by spring 86 ensures that scraper 84 always remains in close contact with the outer wall of filter cylinder 4. As slide bar 83 moves, scraper 84 remains in close contact with the outer wall of filter cylinder 4, removing impurities adhering to the outer wall of filter cylinder 4.

[0038] Reference Figure 1 and Figure 3 As shown, in some embodiments, a seal is provided at the connection between the rotating shaft 81 and the side wall of the water storage tank 1. The seal ensures that water inside the water storage tank 1 will not leak during the rotation of the rotating shaft 81.

[0039] Reference Figure 3 and Figure 4 As shown, in some embodiments, the transmission component 9 includes a first gear 91, which is connected to the end of the rotating shaft 81 away from the rotating plate 82. The first gear 91 meshes with a second gear 92, one end of which is fixedly connected to the output shaft of the motor 6. The motor 6 drives the second gear 92 to rotate. The rotation of the second gear 92 is transmitted to the first gear 91 through gear meshing.

[0040] After motor 6 starts, its output shaft drives the second gear 92 to rotate via a fixed connection. The rotation of the second gear 92 is transmitted to the first gear 91 through gear meshing. The rotation of the first gear 91 drives the rotating shaft 81 to rotate. Through the gear transmission system, the efficiency of energy transfer is improved, ensuring the stable operation of the cleaning component 8.

[0041] Reference Figures 2-4 As shown, in some embodiments, the axial flow impeller 72 is connected to the output shaft of the motor 6 via the second gear 92. The meshing of the first gear 91 and the second gear 92 enables the transfer of rotational energy from the output shaft of the motor 6. This ensures stable transmission between the axial flow impeller 72 and the output shaft of the motor 6, improving energy transfer efficiency. By starting the motor 6 to drive the axial flow impeller 72 to rotate at high speed, the drainage speed of accumulated water is accelerated, improving drainage efficiency.

[0042] After motor 6 starts, its output shaft begins to rotate. The output shaft of motor 6 drives the second gear 92 to rotate via a fixed connection. The rotation of the axial impeller 72 generates negative pressure inside the pumping cylinder 71, thereby drawing water from the water storage tank 1 into the pumping cylinder 71 through the outlet pipe 3. Under the action of the axial impeller 72, the water is pushed to the top of the pumping cylinder 71 and discharged through the guide pipe 73. By starting motor 6 to drive the axial impeller 72 to rotate at high speed, the stable operation of the pumping unit 7 is ensured, the drainage speed of accumulated water is accelerated, and the drainage efficiency is improved. The gear transmission design can effectively utilize the power of motor 6, reduce energy loss, and lower energy consumption.

[0043] Reference Figure 3 and Figure 4As shown, in some embodiments, the number of teeth of the first gear 91 is greater than the number of teeth of the second gear 92.

[0044] The number of teeth on the first gear 91 is greater than that on the second gear 92, which increases the torque of the rotating shaft 81. The larger transmission ratio can increase the torque of the rotating shaft 81, making it easier for the rotating shaft 81 to overcome friction and other resistance, thus ensuring the stable operation of the cleaning component 8.

[0045] Reference Figure 1 As shown, in some embodiments, the bottom of the water storage tank 1 is V-shaped.

[0046] The bottom of the water storage tank 1 is designed in a V-shape, which helps to concentrate sediment, making it easier to clean. It also facilitates water flow, reduces dead corners, and prevents sediment from accumulating over a long period of time.

[0047] As described above, the working principle of the underground drainage device for coal mines provided in this application in actual application scenarios is as follows: After the motor 6 starts, it drives the axial flow impeller to rotate at high speed. The high-speed rotation of the axial flow impeller 72 creates a negative pressure inside the pumping cylinder 71, thereby reducing the pressure inside the pumping cylinder 71 and allowing the outlet pipe 3 to drain the accumulated water in the storage tank 1, thus achieving drainage. The high-speed rotation of the axial flow impeller 72 accelerates the drainage speed of the accumulated water and improves the drainage efficiency. The motor 6 also drives the second gear 92 to rotate. The rotation of the second gear 92 drives the first gear 91 to rotate through gear meshing, which in turn drives the rotating shaft 81 to rotate synchronously. The rotation of the rotating shaft 81 causes the rotating plate 82, which is fixedly connected to it, to rotate, thereby driving the scraper 84 on the slide rod 83 to rotate circumferentially. One end of the spring 86 is in close contact with the rotating plate 82, and the other end is in close contact with the scraper 84. Under the elastic force provided by spring 86, scraper 84 always sticks tightly to the outer wall of filter cylinder 4, effectively removing impurities adsorbed on the outer wall of filter cylinder 4 and avoiding filter hole blockage.

[0048] It is readily understood that, based on the several embodiments provided in this application, those skilled in the art can combine, split, or reorganize the embodiments of this application to obtain other embodiments, none of which exceed the protection scope of this application.

[0049] The above detailed embodiments further illustrate the purpose, technical solution, and beneficial effects of the embodiments of this application. It should be understood that the above are merely specific embodiments of the embodiments of this application and are not intended to limit the protection scope of the embodiments of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solutions of the embodiments of this application should be included within the protection scope of the embodiments of this application.

Claims

1. A coal mine underground drainage device, characterized in that: Includes a water storage tank (1), with an inlet pipe (2) fixedly connected to the top of the water storage tank (1), an overflow tank (10) fixedly connected to one side of the water storage tank (1), and an installation box (5) connected to the side of the water storage tank (1) away from the overflow tank (10). The mounting box (5) includes a water outlet pipe (3), one end of which is connected to the water storage tank (1), and a filter screen cylinder (4) is fixedly connected to the inlet end of the water outlet pipe (3). A cleaning component (8) is connected to the end of the filter screen cylinder (4) away from the water outlet pipe (3). A pumping component (7) is connected to the end of the water outlet pipe (3) away from the water storage tank (1), and a transmission component (9) is connected to the end of the pumping component (7) away from the water outlet pipe (3). The other end of the transmission component (9) is connected to the output end of the motor (6).

2. The coal mine underground drainage device according to claim 1, characterized in that: The water storage tank (1) has an overflow port (101) that communicates with the inside of the water storage tank (1) at the top of the side wall near the overflow tank (10). A one-way valve (103) that prevents the water storage tank (1) from draining into the overflow tank (10) is fixedly connected to the bottom. A return pipe (102) is connected to the end of the one-way valve (103) away from the overflow tank (10).

3. The coal mine underground drainage device according to claim 1, characterized in that: The pumping component (7) includes a pumping cylinder (71), one end of which is connected to the outlet end of the water outlet pipe (3). An axial flow impeller (72) is rotatably connected inside the pumping cylinder (71). The end of the axial flow impeller (72) away from the water outlet pipe (3) is fixedly connected to the output shaft of the motor (6) through the transmission component (9). A water guide pipe (73) communicating with the inside of the pumping cylinder (71) is fixedly connected to the top of the pumping cylinder (71).

4. The coal mine underground drainage device according to claim 3, characterized in that: The cleaning component (8) includes a rotating shaft (81), which passes through the side wall of the water storage tank (1) near the filter screen cylinder (4). A rotating plate (82) is fixedly connected to one end of the rotating shaft (81) away from the filter screen cylinder (4). A sliding rod (83) is provided at one end of the rotating plate (82) away from the rotating shaft (81). The sliding rod (83) passes through the rotating plate (82) and is slidably connected to the rotating plate (82). A scraper (84) is fixedly connected to one end of the slide rod (83) near the filter cylinder (4). The scraper (84) abuts against the outer wall of the filter cylinder (4). A stop block (85) is fixedly connected to the other end of the slide rod (83).

5. The coal mine underground drainage device according to claim 4, characterized in that: The cleaning component (8) also includes a spring (86), which is sleeved on the slide rod (83). One end of the spring (86) is in close contact with the rotating plate (82), and the other end of the spring (86) is in close contact with the scraper (84).

6. The underground drainage device for coal mines according to claim 4, characterized in that: A sealing element is provided at the connection between the rotating shaft (81) and the side wall of the water storage tank (1).

7. The coal mine underground drainage device according to claim 4, characterized in that: The transmission component (9) includes a first gear (91), which is connected to one end of the rotating shaft (81) away from the rotating plate (82). The first gear (91) meshes with a second gear (92), and one end of the second gear (92) is fixedly connected to the output shaft of the motor (6).

8. The coal mine underground drainage device according to claim 7, characterized in that: The axial flow impeller (72) is connected to the output shaft of the motor (6) via the second gear (92).

9. The underground drainage device for coal mines according to claim 7, characterized in that: The number of teeth of the first gear (91) is greater than the number of teeth of the second gear (92).

10. The underground drainage device for coal mines according to claim 1, characterized in that: The bottom of the water storage tank (1) is V-shaped.

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