An automatic water and slag removal system for downward drilling of coal mine gas extraction

Abstract

The present invention discloses an automatic drainage and slag removal system for downward boreholes in coal mine gas extraction, which relates to the technical field of coal mine gas extraction, and includes a grouping collector and a diversion compressed air bag. The diversion compressed air bag is provided with a compressed air joint, and an automatic control valve is installed on the compressed air joint. The compressed air joint is connected to an air compressor, and the diversion branch pipe of the diversion compressed air bag is connected to the borehole through a water blowing pipe, and the borehole and the grouping collector are connected through a collecting branch pipe. The present invention overcomes the shortcomings of the prior art, and through the synergistic effect of components such as the diversion compressed air bag, the water blowing pipe, the grouping collector and the automatic drainer, the compressed air generated by the air compressor and the negative pressure of the extraction pipeline are utilized to realize the automatic discharge of water and waste slag in the borehole, effectively solving the problems of water accumulation and slag removal in the downward borehole, improving the gas extraction effect, ensuring mine safety production, and avoiding the problems of untimely, unreliable and high cost of manual drainage.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas extraction, and in particular to an automatic water and slag removal system for downward drilling of coal mine gas extraction. Background Art

[0002] Coal mine safety management is a top priority for "one ventilation and three preventions." Standardization, refinement, maximization, and automation of gas extraction provide a scientific approach. Drilling to the bottom, pipes reaching the bottom, tight hole sealing, and water release provide powerful management tools for quality standardization of gas extraction.

[0003] The accumulation of water in downward boreholes has always been a problem for the "maximization" of gas extraction. Manual drainage has shortcomings such as untimely and unreliable drainage, personnel safety management, and high investment in employee wages. According to the concept of "automation to reduce manpower" and "it is better to maintain equipment than people", the key to improving the gas extraction effect and achieving early extraction and compliance with standards is to realize the automatic blowing and drainage function of downward boreholes.

[0004] Draining and removing slag from downward boreholes during gas extraction is a major challenge in mine gas extraction, as mine extraction systems are complex and extensive. During gas extraction, accumulated water in the downward boreholes is difficult to drain promptly and completely, severely hindering gas extraction effectiveness and jeopardizing mine safety. Coal mines have introduced various methods for draining and removing slag from downward boreholes, but their effectiveness has been far from ideal, with virtually no automated drainage. Consequently, the only solution is to install manual valves for water blowout, requiring significant manpower and the need to stop drilling to remove water and slag, effectively preventing automated drainage of downward boreholes. Summary of the Invention

[0005] In order to solve the problems mentioned in the above background technology, the present invention provides an automatic water and slag removal system for downward drilling of coal mine gas extraction.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An automatic drainage and slag removal system for downward drilling of coal mine gas extraction includes a grouping collector and a diversion compressed air bag. The diversion compressed air bag is provided with a compressed air joint, and the compressed air joint is installed with an automatic control valve. The compressed air joint is connected to an air compressor. The diversion branch pipe of the diversion compressed air bag is connected to the borehole through a water blowpipe. The borehole and the grouping collector are connected through a collecting branch pipe. A solid-liquid separator is provided between the collecting branch pipe and the grouping collector. One end of the grouping collector is connected to the extraction pipeline, and the other end of the grouping collector is connected to an automatic drainer.

[0008] The solid-liquid separator includes a solid-liquid separator housing, a drain outlet is installed on one side of the solid-liquid separator housing near the top, a filter is installed in the drain outlet, a sewage inlet pipe and an air-water inlet pipe are installed on both sides of the solid-liquid separator housing near the bottom, a scum collector is installed inside the solid-liquid separator housing near the top, and an automatic opening and closing mechanism is provided at the bottom of the scum collector;

[0009] A collector driving mechanism is provided on one side of the solid-liquid separator shell, and the collector driving mechanism is used to transfer the scum collector out of the solid-liquid separator shell, thereby achieving the purpose of separating sludge and water.

[0010] Preferably, the interior of the solid-liquid separator shell is respectively provided with a first annular distributor and a second annular distributor, and the outer sides of the first annular distributor and the second annular distributor are respectively rotatably mounted with a first sealing ring plate and a second sealing ring plate, the first sealing ring plate and the second sealing ring plate are respectively fixed and connected to the air and water inlet pipe and the sewage inlet pipe, and a plurality of distribution pipes are fixed on the side where the first annular distributor and the second annular distributor are close to each other.

[0011] Preferably, a plurality of drainage holes are opened on the outer side of the distribution pipe, stirring blades are fixed around the distribution pipe, and the positions of the distribution pipes on the first annular distributor and the second annular distributor are staggered.

[0012] Preferably, a first rotating motor is fixed on the outer wall of the bottom end of the solid-liquid separator housing, the output shaft of the first rotating motor extends to the interior of the solid-liquid separator housing and is fixed with a vertical rotating shaft, and the outside of the vertical rotating shaft is fixed to the inner side of the first annular distributor through a first bracket.

[0013] Preferably, a vertical sleeve is rotatably installed inside the solid-liquid separator housing, and the outside of the vertical sleeve is fixed to the inner side of the second annular distributor through a second bracket.

[0014] Preferably, a first gear is fixedly installed on the top of the vertical rotating shaft, a first gear ring is fixed on the bottom end of the second annular distributor, a support rod is fixed on the inner wall of the solid-liquid separator shell, the support rod movably passes through the vertical sleeve, and a second gear is rotatably installed on the bottom end of the support rod, the first gear and the second gear are both located inside the first gear ring, and the second gear is located between the first gear and the first gear ring, and the three are meshed in sequence.

[0015] Preferably, the collector driving mechanism is fixed to the outside of the solid-liquid separator casing through a third bracket, a vertical hydraulic cylinder is fixed to the top of the third bracket, the output shaft of the vertical hydraulic cylinder is fixed to a lifting support seat, a support column is provided on the top of the lifting support seat, a rotating support seat is installed on the outside of the support column, a rotating horizontal axis is installed on both sides of the top of the rotating support seat, a horizontal connecting rod is fixed to one end of the rotating horizontal axis, a vertical connecting rod is fixed to the end of the horizontal connecting rod away from the rotating horizontal axis, and the vertical connecting rod is fixed to the slag collector.

[0016] Preferably, a second rotating motor is fixed to the top of the lifting support seat, a third gear is fixed to the output shaft of the second rotating motor, a second gear ring is fixed to the bottom end of the rotating support seat, and the third gear is meshed with the second gear ring.

[0017] Preferably, an arc-shaped rack is fixed to the top of the support column away from the solid-liquid separator housing, a fourth gear is fixed to the outside of the rotating horizontal axis, and the arc-shaped rack is meshed with the arc-shaped rack.

[0018] Preferably, the automatic opening and closing mechanism includes a plurality of fan-shaped baffles, a plurality of fan-shaped through holes are provided at the bottom end of the scum collector, the fan-shaped baffles are rotatably installed in the fan-shaped through holes, a fifth gear is fixed on the supporting shaft of the fan-shaped baffle, a lifting vertical rod is movably installed at the bottom end of the scum collector, a plurality of vertical racks are fixed at one end of the lifting vertical rod, the plurality of vertical racks are meshed with the plurality of fifth gears in a one-to-one correspondence, a reset spring is fixedly installed on the outside of the lifting vertical rod, and an extrusion rod is fixedly installed on the inner wall of the solid-liquid separator shell directly below the lifting vertical rod.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. Efficient and automatic drainage and slag removal: Through the coordinated action of components such as the diversion pressure air bag, water blowing pipe, group collector and automatic drainer, the compressed air generated by the air compressor and the negative pressure of the extraction pipeline are used to realize the automatic discharge of water and waste residue in the borehole, effectively solving the problems of water accumulation and slag discharge in the downward borehole, improving the gas extraction effect, ensuring the safe production of the mine, and avoiding the problems of untimely, unreliable and high cost of manual drainage.

[0021] 2. Effective solid-liquid separation: The solid-liquid separator uses micro-nano bubbles generated by aerated water to float small particles of suspended solid matter, and separates the scum from the water through a scum collector and an automatic opening and closing mechanism, effectively preventing solid impurities from interfering with subsequent drainage and gas extraction processes, ensuring the stable operation of the system. At the same time, the filter filters the lower layer of clear liquid and discharges it, further improving the drainage quality.

[0022] 3. Optimize mixing and separation effects: The first and second annular distributors in the solid-liquid separator, as well as their distribution pipes, stirring blades and other structures, driven by the first rotating motor, can make the dissolved air water and sewage mix more evenly, increase the mixing rate of small particle sludge and nanobubbles, and at the same time stir the liquid to break up the sludge, promote its combination with bubbles and floating, and improve the solid-liquid separation efficiency.

[0023] 4. Convenient scum collection and treatment: The collector drive mechanism realizes the lifting and repositioning of the scum collector through vertical hydraulic cylinders, rotating support seats and other components, which facilitates the removal of accumulated scum for centralized collection and discharge. In the repositioning process, it can automatically drive the scum collector to flip and pour out the sludge. The operation is convenient and efficient, reducing manual intervention and improving the overall treatment efficiency.

[0024] 5. Advantages of the automatic opening and closing mechanism: The automatic opening and closing mechanism at the bottom of the scum collector automatically switches states according to its position within the solid-liquid separator, eliminating the need for manual control. It closes during normal operation to prevent scum leakage and automatically opens to collect scum, ensuring the efficiency and reliability of the solid-liquid separation process and further enhancing the automation level of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is an overall schematic diagram of the present invention;

[0027] Figure 2 A cross-sectional view of the solid-liquid separator housing from a first perspective of the present invention;

[0028] Figure 3 A cross-sectional view of the solid-liquid separator housing according to the present invention from a second viewing angle;

[0029] Figure 4 A cross-sectional view of the first annular distributor and the second annular distributor from a first perspective of the present invention;

[0030] Figure 5 A cross-sectional view of the first annular distributor and the second annular distributor of the present invention from a second perspective;

[0031] Figure 6 A cross-sectional view of the first annular distributor and the second annular distributor of the present invention from a third perspective;

[0032] Figure 7 for Figure 6 A magnified detail of position A in the middle;

[0033] Figure 8 This is a schematic structural diagram of the collector driving mechanism of the present invention;

[0034] Figure 9 for Figure 8 Enlarged detail of position B in the middle;

[0035] Figure 10 This is a schematic diagram of the closed state of the automatic opening and closing mechanism on the scum collector of the present invention;

[0036] In the figure: 101, diversion compressed air bag; 102, compressed air joint; 103, automatic control valve; 104, diversion branch pipe; 105, water blowing pipe; 106, drilling hole; 107, grouping collector; 108, collecting branch pipe; 109, automatic drainer; 110, extraction pipeline; 2, solid-liquid separator shell; 201, air-water inlet pipe; 2011, first sealing ring plate; 202, sewage inlet pipe; 2021, second sealing ring plate; 203, drain port; 204, third bracket; 205, extrusion rod; 206, first rotating motor; 3, scum collector; 301, fan-shaped through hole; 302, fan-shaped baffle; 303, fifth gear; 304, lifting vertical rod; 305, vertical rack; 3 06. Return spring; 4. Vertical hydraulic cylinder; 401. Lifting support seat; 402. Support column; 403. Rotating support seat; 404. Second gear ring; 405. Second rotating motor; 406. Third gear; 407. Arc rack; 5. Rotating horizontal axis; 501. Fourth gear; 502. Horizontal connecting rod; 503. Vertical connecting rod; 601. Vertical rotating shaft; 6011. First bracket; 6012. First gear; 602. First annular distributor; 603. Distribution pipe; 6031. Drain hole; 6032. Stirring blade; 604. Vertical sleeve; 6041. Second bracket; 6042. First gear ring; 605. Second annular distributor; 7. Support rod; 701. Second gear. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] Example 1

[0039] Reference Figure 1-10A coal mine gas extraction downward drilling automatic water drainage and slag removal system includes a grouping collector 107 and a diversion compressed air bag 101, the diversion compressed air bag 101 is provided with a compressed air joint 102, and the compressed air joint 102 is installed with an automatic control valve 103, the compressed air joint 102 is connected to an air compressor, and a diversion branch pipe 104 of the diversion compressed air bag 101 is connected to a borehole 106 through a water blowing pipe 105, and the borehole 106 is connected to the grouping collector 107 through a collecting branch pipe 108, and a solid-liquid separator is provided between the collecting branch pipe 108 and the grouping collector 107, one end of the grouping collector 107 is connected to an extraction pipeline 110, and the other end of the grouping collector 107 is connected to an automatic drainer 109;

[0040] Compressed air is generated by an air compressor and then diverted by a diversion compressed air bag 101. The air is then blown into a borehole 106 through a diversion branch pipe 104 and a water blowing pipe 105. At the same time, a negative pressure device is connected to the extraction pipe 110 to generate negative pressure. Under these dual effects, the accumulated water in the borehole 106 is sent to the grouping collector 107 and discharged by the automatic drain 109, thus realizing an automatic blowing and drainage function.

[0041] The blown sewage contains small particles of sludge, and after passing through the solid-liquid separator, the solids are separated, thus achieving the purpose of solid-liquid separation.

[0042] The solid-liquid separator includes a solid-liquid separator housing 2, a drain outlet 203 is installed near the top of one side of the solid-liquid separator housing 2, a filter is installed in the drain outlet 203, a sewage inlet pipe 202 and an air-water inlet pipe 201 are installed near the bottom of both sides of the solid-liquid separator housing 2, and a scum collector 3 is installed near the top of the interior of the solid-liquid separator housing 2, and an automatic opening and closing mechanism is provided at the bottom of the scum collector 3;

[0043] The sewage enters the solid-liquid separator housing 2 through the sewage inlet pipe 202, and a solution mixed with compressed gas is introduced into the solid-liquid separator housing 2 through the air-water inlet pipe 201, generating a large number of micro-nano bubbles, which adhere to the small particles of solid suspended matter and float to the water surface. The automatic opening and closing mechanism at the bottom of the scum collector 3 is in the open state in this state, and the suspended matter can float to the water surface through it. The clear liquid in the lower layer is filtered through the filter in the drain port 203 and then discharged. After a large amount of scum accumulates in the upper layer,

[0044] A collector driving mechanism is provided on one side of the solid-liquid separator housing 2. The collector driving mechanism is used to transfer the scum collector 3 out of the solid-liquid separator housing 2. During the transfer process, the automatic opening and closing mechanism is closed, and the scum is taken out by the scum collector 3, thereby achieving the purpose of separating the scum from the water. The scum is collected and discharged in a centralized manner.

[0045] Example 2

[0046] Reference Figure 1-10 The difference between this embodiment and embodiment 1 is that a first annular distributor 602 and a second annular distributor 605 are respectively provided inside the solid-liquid separator housing 2, and a first sealing ring plate 2011 and a second sealing ring plate 2021 are rotatably mounted on the outer sides of the first annular distributor 602 and the second annular distributor 605, respectively. The first sealing ring plate 2011 and the second sealing ring plate 2021 are fixed and communicated with the air-water inlet pipe 201 and the sewage inlet pipe 202, respectively. A plurality of distribution pipes 603 are fixed on the side of the first annular distributor 602 and the second annular distributor 605 close to each other;

[0047] The dissolved air water and sewage introduced by the air-containing water inlet pipe 201 and the sewage inlet pipe 202 enter the first annular distributor 602 and the second annular distributor 605 respectively, and then disperse and flow out through multiple distribution pipes 603. They can be mixed more evenly with each other, thereby improving the mixing rate between small particle sludge and nanobubbles and accelerating the floating of scum.

[0048] Among them, a plurality of drainage holes 6031 are opened on the outside of the distribution pipe 603, and stirring blades 6032 are fixed around the distribution pipe 603. The positions of the distribution pipes 603 on the first annular distributor 602 and the second annular distributor 605 are staggered with each other. A first rotating motor 206 is fixed on the outer wall of the bottom end of the solid-liquid separator housing 2. The output shaft of the first rotating motor 206 extends to the interior of the solid-liquid separator housing 2 and is fixed with a vertical rotating shaft 601. The outside of the vertical rotating shaft 601 is fixed to the inner side of the first annular distributor 602 through a first bracket 6011. A vertical sleeve 604 is rotatably installed inside the solid-liquid separator housing 2. The exterior of the vertical sleeve 604 is fixed to the inner side of the second annular distributor 605 via a second bracket 6041. A first gear 6012 is fixedly mounted on the top of the vertical rotating shaft 601, and a first gear ring 6042 is fixed to the bottom end of the second annular distributor 605. A support rod 7 is fixed to the inner wall of the solid-liquid separator housing 2. The support rod 7 movably passes through the vertical sleeve 604, and a second gear 701 is rotatably mounted on the bottom end of the support rod 7. The first gear 6012 and the second gear 701 are both located inside the first gear ring 6042, and the second gear 701 is located between the first gear 6012 and the first gear ring 6042, and the three are meshed in sequence.

[0049] When the vertical rotating shaft 601 is driven to rotate by the first rotating motor 206, the vertical rotating shaft 601 will first drive the first annular distributor 602 to rotate, and can drive the second annular distributor 605 to rotate in the opposite direction through the meshing transmission between the second gear 701, the first gear 6012 and the first gear ring 6042, which can further improve the mixing and distribution effect, and can also drive the stirring blades 6032 to stir the liquid, further break up the sludge, and promote small particles of sludge to combine with nanobubbles and float up.

[0050] Example 3

[0051] Reference Figure 1-10 , the difference between this embodiment and embodiment 1 is that the collector driving mechanism is fixed to the outside of the solid-liquid separator housing 2 through the third bracket 204, a vertical hydraulic cylinder 4 is fixed to the top of the third bracket 204, the output shaft of the vertical hydraulic cylinder 4 is fixed to a lifting support seat 401, a support column 402 is provided at the top of the lifting support seat 401, a rotating support seat 403 is rotatably installed on the outside of the support column 402, a rotating horizontal axis 5 is installed on both sides of the top of the rotating support seat 403, a horizontal connecting rod 502 is fixed to one end of the rotating horizontal axis 5, a vertical connecting rod 503 is fixed to the end of the horizontal connecting rod 502 away from the rotating horizontal axis 5, and the vertical connecting rod 503 is fixed to the scum collector 3;

[0052] The vertical hydraulic cylinder 4 can drive the lifting support base 401 and the rotating support base 403 to lift and move as a whole, thereby driving the scum collector 3 to lift and move, thereby driving the scum collector 3 to move out of the solid-liquid separator housing. A second rotating motor 405 is fixed to the top of the lifting support base 401, and the output shaft of the second rotating motor 405 is fixed to the third gear 406. The bottom end of the rotating support base 403 is fixed to a second gear ring 404, and the third gear 406 is engaged with the second gear ring 404. The second rotating motor 405 can drive the third gear 406 to rotate, and then the third gear 406 is engaged with the second gear ring 404 to drive the two scum collectors 3 to exchange positions, thereby removing the scum collector 3 containing sludge inside, and replacing a new scum collector 3 to enter the solid-liquid separator housing 2, thereby achieving the purpose of convenient sludge separation.

[0053] Among them, an arc-shaped rack 407 is fixed to the top of the support column 402 away from the side of the solid-liquid separator housing 2, and a fourth gear 501 is fixed to the outside of the rotating horizontal axis 5. The arc-shaped rack 407 is meshed with the arc-shaped rack 407. When the rotating support seat 403 rotates, the fourth gear 501 will pass through the arc-shaped rack 407, and in the process of passing through the arc-shaped rack 407, it drives the rotating horizontal axis 5 to rotate 380 degrees, thereby automatically driving the scum collector 3 to flip over and pour out the sludge.

[0054] Example 4

[0055] Reference Figure 1-10The difference between this embodiment and embodiment 1 is that the automatic opening and closing mechanism includes a plurality of fan-shaped baffles 302, a plurality of fan-shaped through holes 301 are formed at the bottom end of the scum collector 3, the fan-shaped baffles 302 are rotatably mounted in the fan-shaped through holes 301, a fifth gear 303 is fixed to the supporting shaft of the fan-shaped baffles 302, a lifting vertical rod 304 is movably mounted at the bottom end of the scum collector 3, a plurality of vertical racks 305 are fixed to one end of the lifting vertical rod 304, and the plurality of vertical racks 305 are meshed with the plurality of fifth gears 303 in a one-to-one correspondence, a return spring 306 is fixedly mounted on the outside of the lifting vertical rod 304, and an extrusion rod 205 is fixedly mounted on the inner wall of the solid-liquid separator housing 2 directly below the lifting vertical rod 304;

[0056] When the return spring 306 is in a natural state, the fan-shaped baffle 302 is in a horizontal state and blocks the fan-shaped through hole 301. At this time, the automatic opening and closing mechanism is in a closed state. Only when the scum collector 3 moves downward in the process of the solid-liquid separator housing 2, the lifting vertical rod 304 contacts the extrusion rod 205, the lifting vertical rod 304 is pushed upward, the return spring 306 is compressed, and the vertical rack 305 follows the upward movement and drives the fifth gear 303 and the fan-shaped baffle 302 to rotate through engagement. When the scum collector 3 moves downward into place, the fan-shaped baffle 302 just rotates to a vertical state. At this time, the automatic opening and closing mechanism can be switched to an open state without manual control, which is more efficient and convenient.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In the present invention, unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0059] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by a person skilled in the art. The provision of power is also common knowledge in the art. The present invention is mainly used to protect mechanical devices, so the control method and circuit connection are not explained in detail in the present invention.

[0060] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic drainage and slag removal system for downward drilling of coal mine gas extraction, comprising a grouping collector (107) and a diversion pressure air bag (101), characterized in that: The diversion compressed air bag (101) is provided with a compressed air joint (102), and the compressed air joint (102) is installed with an automatic control valve (103). The compressed air joint (102) is connected to the air compressor. The diversion branch pipe (104) of the diversion compressed air bag (101) is connected to the borehole (106) through the water blowing pipe (105). The borehole (106) and the grouping collector (107) are connected through the collecting branch pipe (108). A solid-liquid separator is provided between the collecting branch pipe (108). One end of the grouping collector (107) is connected to the extraction pipeline (110), and the other end of the grouping collector (107) is connected to the automatic drainer (109). The solid-liquid separator comprises a solid-liquid separator housing (2), a drain outlet (203) is installed on one side of the solid-liquid separator housing (2) near the top, a filter is provided in the drain outlet (203), a sewage inlet pipe (202) and an air-water inlet pipe (201) are respectively installed on both sides of the solid-liquid separator housing (2) near the bottom, a scum collector (3) is installed inside the solid-liquid separator housing (2) near the top, and an automatic opening and closing mechanism is provided at the bottom of the scum collector (3); A collector drive mechanism is provided on one side of the solid-liquid separator housing (2), and the collector drive mechanism is used to transfer the scum collector (3) out of the interior of the solid-liquid separator housing (2), thereby achieving the purpose of separating sludge from water; The collector driving mechanism is fixed to the outside of the solid-liquid separator housing (2) through a third bracket (204); a vertical hydraulic cylinder (4) is fixed to the top of the third bracket (204); a lifting support seat (401) is fixed to the output shaft of the vertical hydraulic cylinder (4); a support column (402) is provided at the top of the lifting support seat (401); a rotating support seat (403) is rotatably installed on the outside of the support column (402); a rotating horizontal axis (5) is installed on both sides of the top of the rotating support seat (403); a horizontal connecting rod (502) is fixed to one end of the rotating horizontal axis (5); a vertical connecting rod (503) is fixed to the end of the horizontal connecting rod (502) away from the rotating horizontal axis (5); and the vertical connecting rod (503) is fixed to the scum collector (3); A second rotating motor (405) is fixed to the top of the lifting support seat (401), a third gear (406) is fixed to the output shaft of the second rotating motor (405), a second gear ring (404) is fixed to the bottom of the rotating support seat (403), and the third gear (406) is meshed with the second gear ring (404); An arc-shaped rack (407) is fixed to the top of the support column (402) away from the solid-liquid separator housing (2), and a fourth gear (501) is fixed to the outside of the rotating horizontal shaft (5), and the arc-shaped rack (407) is meshed with the arc-shaped rack (407); The automatic opening and closing mechanism comprises a plurality of fan-shaped baffles (302), a plurality of fan-shaped through holes (301) are provided at the bottom end of the scum collector (3), the fan-shaped baffles (302) are rotatably mounted in the fan-shaped through holes (301), a fifth gear (303) is fixed on the supporting shaft of the fan-shaped baffles (302), a lifting vertical rod (304) is movably mounted at the bottom end of the scum collector (3), a plurality of vertical racks (305) are fixed at one end of the lifting vertical rod (304), the plurality of vertical racks (305) are meshed with the plurality of fifth gears (303) in a one-to-one correspondence, a reset spring (306) is fixedly mounted on the outside of the lifting vertical rod (304), and an extrusion rod (205) is fixedly mounted on the inner wall of the solid-liquid separator housing (2) directly below the lifting vertical rod (304).

2. The automatic drainage and slag removal system for downward drilling of coal mine gas extraction according to claim 1 is characterized by: A first annular distributor (602) and a second annular distributor (605) are provided inside the solid-liquid separator housing (2), and a first sealing ring plate (2011) and a second sealing ring plate (2021) are rotatably mounted on the outer sides of the first annular distributor (602) and the second annular distributor (605), respectively. The first sealing ring plate (2011) and the second sealing ring plate (2021) are fixed to and communicate with the air-water inlet pipe (201) and the sewage inlet pipe (202), respectively. A plurality of distribution pipes (603) are fixed to the sides of the first annular distributor (602) and the second annular distributor (605) that are close to each other.

3. The automatic drainage and slag removal system for downward drilling of coal mine gas extraction according to claim 2 is characterized by: The outer side of the distribution pipe (603) is provided with a plurality of drainage holes (6031), and stirring blades (6032) are fixed around the distribution pipe (603). The positions of the distribution pipes (603) on the first annular distributor (602) and the second annular distributor (605) are staggered.

4. The automatic water and slag removal system for downward drilling of coal mine gas extraction according to claim 2 is characterized by: A first rotating motor (206) is fixed on the outer wall of the bottom end of the solid-liquid separator housing (2), and the output shaft of the first rotating motor (206) extends to the interior of the solid-liquid separator housing (2) and is fixed with a vertical rotating shaft (601), and the exterior of the vertical rotating shaft (601) is fixed to the inner side of the first annular distributor (602) through a first bracket (6011).

5. The automatic water and slag removal system for downward drilling of coal mine gas extraction according to claim 4 is characterized in that: A vertical sleeve (604) is rotatably mounted inside the solid-liquid separator housing (2), and the outside of the vertical sleeve (604) is fixed to the inner side of the second annular distributor (605) via a second bracket (6041).

6. The automatic water and slag removal system for downward drilling of coal mine gas extraction according to claim 5 is characterized by: A first gear (6012) is fixedly installed on the top end of the vertical rotating shaft (601), a first gear ring (6042) is fixed on the bottom end of the second annular distributor (605), a support rod (7) is fixed on the inner wall of the solid-liquid separator housing (2), the support rod (7) movably passes through the vertical sleeve (604), and a second gear (701) is rotatably installed on the bottom end of the support rod (7), the first gear (6012) and the second gear (701) are both located inside the first gear ring (6042), and the second gear (701) is located between the first gear (6012) and the first gear ring (6042), and the three are meshed in sequence.

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