Coal mine underground gas circulation pumping drainage system

Abstract

The invention discloses a coal mine underground gas circulation pumping and drainage system, which relates to the technical field of coal mining safety, and comprises an exhaust mechanism, a gas drainage mechanism, a gas drainage mechanism, a gas drainage mechanism, a gas drainage mechanism and a gas drainage mechanism, the air inlet mechanism is arranged in the exhaust mechanism; the exhaust fan is arranged outside the mine and connected with the exhaust mechanism; the air blower is arranged outside the mine and connected with the air inlet mechanism; the displacement device is located in the mine, is movably arranged between the air inlet mechanism and the exhaust mechanism and can rotate around the air inlet mechanism; the filtering device is arranged corresponding to the displacement device and is fixedly connected with the displacement device; the multiple cleaning devices are distributed along the exhaust mechanism located in the mine and fixed to the bottom of the exhaust mechanism. The space occupation of the pumping and drainage system is effectively reduced, dust and impurities in the pipeline are cleaned in time, the influence of the dust and impurities on the gas extraction efficiency is effectively avoided, and the exhaust fan is prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine safety in production, and more specifically, to a gas circulation pumping and drainage system for coal mines underground. Background Art

[0002] When coal mines are exploited, mine shafts need to be opened underground. When coal is mined in the mine shafts, gas will penetrate through the coal seams into the mine shafts. The gas contains carbon monoxide gas, which is toxic and easily poses a life threat to the miners. In addition, methane in the gas is likely to burn and explode when its concentration reaches a certain level, causing accidents in coal mine exploitation. Therefore, during the process of coal mine exploitation, it is necessary to pump and drain the gas in the mine shafts to prevent the concentration of internal gas from rising. Since there are many dust impurities mixed in the mine shafts, when the gas underground is pumped, the dust impurities are pumped out together with the gas. The dust impurities will not only accumulate in the pipeline, affecting the pumping efficiency of the gas, but also affect the exhaust fan. However, it is difficult to clean and replace the filtering mechanism in the pipeline in a timely manner, which will instead accelerate the accumulation of dust impurities and affect the pumping efficiency. Therefore, it is necessary to provide a gas circulation pumping and drainage system for coal mines underground to solve the above problems. Summary of the Invention

[0003] To achieve the above object, the present invention provides the following technical solutions: A gas circulation pumping and drainage system for coal mines underground, comprising:

[0004] An exhaust mechanism, one end of which is fixedly arranged at the top of the mine shaft, and the other end passes through the soil layer and is arranged outside the mine shaft;

[0005] An intake mechanism, arranged inside the exhaust mechanism, one end of which passes through the soil layer and the exhaust mechanism and is arranged outside the mine shaft;

[0006] An exhaust fan, arranged outside the mine shaft and connected to the exhaust mechanism;

[0007] A blower, arranged outside the mine shaft and connected to the intake mechanism;

[0008] A displacement device, located inside the mine shaft, movably arranged between the intake mechanism and the exhaust mechanism, and capable of rotating around the intake mechanism;

[0009] A filtering device, correspondingly arranged with the displacement device and fixedly connected to the displacement device;

[0010] A cleaning device, distributed along the exhaust mechanism inside the mine shaft and fixed to the bottom of the exhaust mechanism.

[0011] Further, as a preference, the exhaust mechanism comprises:

[0012] An exhaust manifold is fixedly arranged at the top of the mine, and a connection port corresponding to the cleaning device is provided at the bottom of the exhaust manifold;

[0013] An exhaust main pipe, one end of which is connected to the exhaust manifold, and the other end passes through the soil layer and is connected to an exhaust fan;

[0014] A plurality of air inlets are distributed along the exhaust manifold and are fixedly connected to the exhaust manifold. The air inlets are located in the upper layer of the mine, and a conical guiding surface is provided at the air inlet of the air inlets.

[0015] Further, as a preference, the air intake mechanism includes:

[0016] An air intake branch pipe is arranged inside the exhaust manifold;

[0017] An air intake main pipe is arranged inside the exhaust main pipe. One end of the air intake main pipe is connected to the air intake branch pipe, and the other end passes through the exhaust main pipe and is connected to a blower;

[0018] An air intake port is correspondingly arranged with the air inlet, is arranged below the air inlet, is located in the middle and lower layers of the mine, and the air intake port is connected to the air intake branch pipe. A conical diffusing surface is provided at the air outlet of the air intake port.

[0019] Further, as a preference, the displacement device includes:

[0020] A displacement assembly is arranged on the outer wall of the air intake branch pipe and is located inside the exhaust manifold;

[0021] An adjustment assembly is arranged outside the displacement assembly;

[0022] A guiding ring surface is fixedly connected to one side of the displacement assembly close to the air inlet at one end, and is slidably connected to the air intake branch pipe at the other end;

[0023] An outer wall cleaning member is arranged at the connection between the guiding ring surface and the air intake branch pipe.

[0024] Further, as a preference, the displacement assembly includes:

[0025] Two positioning ring bodies are symmetrically distributed and are arranged on the outer wall of the air intake branch pipe. The outer sides of the positioning ring bodies are respectively fixedly connected to the filtering device and the guiding ring surface;

[0026] A limiting inner ring is fixed between the positioning ring bodies and has a gap with the air intake branch pipe. A plurality of annularly distributed notches are provided on the limiting inner ring;

[0027] A limiting outer ring is fixed between the positioning ring bodies and is located outside the limiting inner ring;

[0028] A plurality of roller mechanisms are annularly distributed, are rotatably arranged inside the limiting outer ring, and pass through the notches on the limiting inner ring and are in contact with the air intake branch pipe;

[0029] The closed ring is fixed on the outer ring of the positioning ring body.

[0030] Furthermore, as a preference, the adjusting assembly includes:

[0031] An adjusting gear, rotatably arranged on the outside of the limiting outer ring and fixedly connected to the roller mechanism;

[0032] A rotating gear, rotatably arranged on the outside of the limiting outer ring and connected to a rotating motor arranged between the limiting outer ring and the limiting inner ring;

[0033] An adjusting gear ring, rotatably arranged between the limiting outer ring and the closed ring and meshing with the adjusting gear and the rotating gear.

[0034] Furthermore, as a preference, the filtering device includes:

[0035] Spaced inclined blocks, a plurality of which are annularly distributed, fixedly connected to the side of the displacement assembly away from the diversion ring surface and slidably connected to the outer wall of the intake branch pipe;

[0036] Filtering assemblies, a plurality of which are annularly distributed and arranged at intervals with the spaced inclined blocks;

[0037] An extension ring, arranged on the side of the filtering assembly away from the displacement assembly;

[0038] An inner wall cleaning member, slidably arranged on the extension ring and fitting with the inside of the exhaust branch pipe.

[0039] Furthermore, as a preference, the filtering assembly includes:

[0040] Filter elements, a plurality of which are distributed step by step from the displacement assembly to the extension ring and fit with the outer wall of the intake branch pipe;

[0041] An outer filter screen, arranged on the outer ring of the filter element and on the ring surfaces where each filter element contacts the gas.

[0042] Furthermore, as a preference, the cleaning device includes:

[0043] A connecting piece, fixed at the bottom connection port of the exhaust branch pipe;

[0044] Closed arc plates, two of which are symmetrically distributed about the axis of the exhaust branch pipe and slidably arranged at the connection between the connecting piece and the connection port;

[0045] A cleaning collection box, detachably connected to the bottom of the connecting piece;

[0046] A scraping assembly, slidably arranged inside the cleaning collection box.

[0047] Furthermore, as a preference, the scraping assembly includes:

[0048] Lifting slideway, correspondingly arranged with the connecting piece, and slidably arranged up and down inside the cleaning and collection box;

[0049] Manipulating robot, movably arranged on the lifting slideway;

[0050] Scraper, fixed on the manipulating robot and corresponding to the bottom connection port of the exhaust branch pipe.

[0051] Compared with the prior art, the beneficial effects of the present invention are:

[0052] In the present invention, through the arrangement of the exhaust mechanism and the intake mechanism, the underground gas is pumped and discharged and air is injected, and the intake pipe is arranged inside the exhaust pipe, effectively reducing the space occupied by the pumping and discharging system; through the arrangement of the displacement device, the filtering device is driven to move on the intake branch pipe to clean the outer wall of the intake branch pipe and the inner wall of the exhaust branch pipe in time, preventing dust and impurities from accumulating in the pipe wall; through the arrangement of the filtering device, large-particle dust and impurities are intercepted outside, and the extracted gas is further filtered inside; through the arrangement of the cleaning device, large-particle dust and impurities outside the filtering device are removed, improving the filtering efficiency of the filtering device, and through the connection between the cleaning device and the exhaust branch pipe, the filtering component can be replaced in time. Description of the drawings

[0053] Figure 1 It is a schematic diagram of the overall structure of a gas circulation pumping and discharging system in a coal mine;

[0054] Figure 2 It is a schematic diagram of the displacement device structure;

[0055] Figure 3 It is a schematic diagram of the displacement component structure;

[0056] Figure 4 It is a schematic diagram of the adjustment component structure;

[0057] Figure 5 It is a schematic diagram of the filtering device and the cleaning device structure;

[0058] Figure 6 It is a schematic diagram of the filtering component and the scraping component structure;

[0059] In the figure: 1. Exhaust mechanism; 2. Intake mechanism; 3. Exhaust fan; 4. Blower; 5. Displacement device; 6. Filter device; 7. Cleaning device; 11. Exhaust branch pipe; 12. Exhaust main pipe; 13. Suction port; 21. Intake branch pipe; 22. Intake main pipe; 23. Intake port; 51. Displacement assembly; 52. Adjustment assembly; 53. Conduction ring surface; 54. Outer wall cleaning part; 61. Spaced inclined block; 62. Filter assembly; 63. Extension ring; 64. Inner wall cleaning part; 71. Connecting part; 72. Closed arc plate; 73. Cleaning collection box; 74. Scraping assembly; 511. Positioning ring body; 512. Limiting inner ring; 513. Limiting outer ring; 514. Roller mechanism; 515. Closed ring; 521. Adjusting gear; 522. Rotating gear; 523. Adjusting gear ring; 621. Filter element; 622. Outer filter screen; 741. Lifting slideway; 742. Manipulating robot; 743. Scraper. Detailed implementation mode

[0060] Please refer to Figures 1 to 6 , in the embodiment of the present invention, a gas circulation extraction and drainage system for coal mines underground includes:

[0061] [[ID=]]

[0062] An exhaust mechanism 1, one end of which is fixedly arranged at the top of the mine, and the other end passes through the soil layer and is arranged outside the mine, serving as an air outlet channel for discharging the air in the mine to the outside of the mine;

[0063] An intake mechanism 2, arranged inside the exhaust mechanism 1, one end of which passes through the soil layer and the exhaust mechanism 1 and is arranged outside the mine, and is used as an intake channel for discharging the gas outside the mine into the mine;

[0064] An exhaust fan 3, arranged outside the mine, connected to the exhaust mechanism 1, and extracting the air in the mine through the exhaust mechanism 1;

[0065] A blower 4, arranged outside the mine, connected to the intake mechanism 2, and blowing fresh air outside into the mine through the intake mechanism 2;

[0066] A displacement device 5, arranged inside the mine, located between the connection channels of the air inside the mine and the outside, that is, between the exhaust mechanism 1 and the intake mechanism 2 inside the mine, and can move and rotate around the intake mechanism 2. The number of displacement devices 5 can be multiple, such as two groups symmetrically distributed, and multiple are symmetrically distributed in each group;

[0067] A filter device 6, corresponding to the displacement device 5 and fixedly connected to the displacement device 5, for filtering gases such as gas in the air;

[0068] In this embodiment, the exhaust mechanism 1 includes:

[0069] An exhaust manifold 11, which can be fixedly arranged at the top of the mine by using fixing parts such as clamps and bolts, and a connection port corresponding to the cleaning device 7 is provided at the bottom of the exhaust manifold 11;

[0070] An exhaust main pipe 12, one end of which is connected to the exhaust manifold 11, and the other end passes through the soil layer to connect to the exhaust fan 3;

[0071] A plurality of air inlets 13 are distributed along the exhaust manifold 11 and are fixedly connected to the exhaust manifold 11. The air inlets 13 are located in the upper space of the mine, and a conical guide surface is provided at the air inlet of the air inlets 13. That is to say, under the action of the exhaust fan 3, the air with gas in the upper layer inside the mine enters the exhaust manifold 11 from the air inlets 13, and under the action of the conical guide surface, the gas is absorbed from the horizontal direction around, increasing the discharge speed of the gas. The gas enters the exhaust main pipe 12 through the exhaust manifold 11 and is discharged from the exhaust fan 3.

[0072] In this embodiment, the intake mechanism 2 includes:

[0073] An intake manifold 21, which is arranged inside the exhaust manifold 11;

[0074] An intake main pipe 22, which is arranged inside the exhaust main pipe 12, one end of which is connected to the intake manifold 21, and the other end passes through the exhaust main pipe 12 to connect to the blower 4;

[0075] An air inlet 23, which is arranged corresponding to the air inlet 13, is arranged below the air inlet 13, is located in the middle and lower layers of the mine, and is connected to the intake manifold 21. A conical diffuser surface is provided at the air outlet of the air inlet 23.

[0076] That is to say, under the action of the blower 4, the external air enters the intake manifold 21 through the intake main pipe 22 and is dispersed and transported into the mine through a plurality of air inlets 23. Under the action of the conical diffuser surface, the gas entering the mine diffuses around. The air inlet 23 is below the air inlet 13. The air inlet 23 increases the air pressure inside the mine, and the air inlet 13 absorbs the gas in the upper layer inside the mine to form a negative pressure, forming a gas flow cycle, quickly discharging the gas in the upper layer, and replacing the gas in the mine with fresh air.

[0077] In this embodiment, the displacement device 5 includes:

[0078] A displacement assembly 51, which is arranged on the outer wall of the intake manifold 21 and is located inside the exhaust manifold 11;

[0079] An adjustment assembly 52, which is arranged outside the displacement assembly 51;

[0080] The diversion toroidal surface 53 is fixedly connected to one side of the displacement assembly 51 close to the air inlet 13 at one end, and is slidably connected to the intake branch pipe 21 at the other end;

[0081] The outer wall cleaning member 54 is arranged at the connection between the diversion toroidal surface 53 and the intake branch pipe 21.

[0082] That is to say, driven by the displacement assembly 51, the displacement device 5 and the filtering device 6 move on the intake branch pipe 21 and can rotate on the intake branch pipe 21. While the displacement device 5 and the filtering device 6 rotate and move between the intake branch pipe 21 and the exhaust branch pipe 11, the outer wall of the intake branch pipe 21 and the inner wall of the exhaust branch pipe 11 are cleaned. When cleaning the outer wall of the intake branch pipe 21, it is mainly carried out by the outer wall cleaning member 54, effectively preventing dust impurities in the gas from accumulating on the pipe wall and affecting the transportation of the gas. And under the action of the adjusting assembly 52, the rotation direction and moving speed of the displacement assembly 51 are controlled. When the gas enters the exhaust branch pipe 11, under the guiding action of the diversion toroidal surface 53, the gas flows towards the filtering device 6, and after filtering, it converges into the exhaust main pipe 12 and is discharged by the exhaust fan 3.

[0083] In this embodiment, the displacement assembly 51 includes: a positioning ring body 511, a limiting inner ring 512, a limiting outer ring 513, a roller mechanism 514 and a closing ring 515. The specific structure and working principle are as follows:

[0084] The positioning ring body 511: There are two positioning ring bodies 511 symmetrically distributed, arranged on the outer wall of the intake branch pipe 21, and their outer sides are fixedly connected to the filtering device 6 and the diversion toroidal surface 53 respectively. The function of the positioning ring body 511 is to provide stable support and positioning for the displacement device 5.

[0085] The limiting inner ring 512: The limiting inner ring 512 is fixed between the positioning ring bodies 511 and there is a gap between it and the intake branch pipe 21. The outer side surface of the limiting inner ring 512 contacts the outer wall of the intake branch pipe 21, and there are a plurality of annularly distributed notches on it. A plurality of rollers of the roller mechanism 514 pass through these notches and contact the outer wall of the intake branch pipe 21. Through these notches, the rollers can freely roll within the limiting inner ring 512, thereby realizing the rotation and movement of the displacement device 5.

[0086] The limiting outer ring 513: The limiting outer ring 513 is fixed between the positioning ring bodies 511 and is located outside the limiting inner ring 512, playing a role in further restricting the movement range of the rollers to ensure that they roll within the correct track.

[0087] Roller mechanism 514: The roller mechanism 514 consists of multiple rollers, which are annularly distributed and rotatably arranged inside the limit outer ring 513. Each roller is in contact with the intake manifold 21 through a notch on the limit inner ring 512. When the roller of the roller mechanism 514 is perpendicular to the axis of the intake manifold 21, the roller drives the displacement device 5 to rotate on the intake manifold 21; when the roller of the roller mechanism 514 is parallel to the axis of the intake manifold 21, the roller drives the displacement device 5 to translate on the intake manifold 21; when the roller of the roller mechanism 514 intersects the axis of the intake manifold 21, the roller will generate a combined movement of rotation and translation while rolling, thereby driving the displacement device 5 to rotate and move simultaneously on the intake manifold 21.

[0088] Sealing ring 515: The sealing ring 515 is fixed on the outer ring of the positioning ring body 511, and its function is to ensure the stability and sealing of each component during the operation of the displacement assembly 51, and prevent external substances from entering the inside of the displacement assembly 51.

[0089] Under the action of the roller mechanism 514, the spherical roller rolls on the outer wall of the intake manifold 21, enabling the displacement device 5 to complete different forms of movement on the intake manifold 21. The motion state of the roller is closely related to the axis direction of the intake manifold 21, respectively resulting in the rotation, translation, or combined movement of rotation and translation of the displacement device 5. Through these combined movements, the displacement device 5 can precisely control the position change on the intake manifold 21 to meet the actual operation requirements.

[0090] That is to say, under the action of the roller mechanism 514, the roller rolls on the outer wall of the intake manifold 21, and then drives the entire displacement device 5 to rotate or move on the intake manifold 21. When the roller of the roller mechanism 514 is perpendicular to the axis of the intake manifold 21, driven by the roller mechanism 514, the displacement device 5 rotates on the intake manifold 21; when the roller of the roller mechanism 514 is parallel to the axis of the intake manifold 21, driven by the roller mechanism 514, the displacement device 5 moves on the intake manifold 21; when the roller of the roller mechanism 514 intersects the axis of the intake manifold 21, driven by the roller mechanism 514, the displacement device 5 rotates and moves simultaneously on the intake manifold 21.

[0091] In this embodiment, the adjustment assembly 52 includes components such as an adjustment gear 521, a rotating gear 522, an adjustment gear ring 523, etc. The specific structure and working principle are as follows:

[0092] Adjustment gear 521: The adjustment gear 521 is rotatably arranged outside the limit outer ring 513 and is fixedly connected to the roller mechanism 514. The function of the adjustment gear 521 is to drive the roller of the roller mechanism 514 by rotation to adjust the contact mode between the roller and the intake manifold 21, thereby adjusting the motion state of the displacement device 5 on the intake manifold 21.

[0093] Rotating gear 522: The rotating gear 522 is arranged on the outside of the limiting outer ring 513. Its function is to drive the rotation of the adjusting gear ring 523 by connecting with the rotating motor. The rotation of the rotating gear 522 directly affects the rotation of the adjusting gear ring 523, thereby further adjusting the position of the adjusting gear 521 and driving the rolling and rotation of the roller mechanism 514.

[0094] Adjusting gear ring 523: The adjusting gear ring 523 is rotatably arranged between the limiting outer ring 513 and the closed ring 515 and meshes with the adjusting gear 521 and the rotating gear 522. The function of the adjusting gear ring 523 is to be driven by the rotating motor through meshing with the rotating gear 522, thereby driving the rotation of the adjusting gear 521, further adjusting the position of the roller mechanism 514, and changing the axial position of the roller of the roller mechanism 514 and the intake manifold 21.

[0095] Its working principle is as follows:

[0096] When the rotating motor between the limiting outer ring 513 and the limiting inner ring 512 works, the rotating gear 522 drives the adjusting gear ring 523 to rotate through the motor. The rotation of the adjusting gear ring 523 drives the rotation of the adjusting gear 521 through meshing, thereby affecting the rotation of the roller mechanism 514 fixedly connected thereto. Through this transmission mechanism, the position of the roller of the roller mechanism 514 relative to the axis of the intake manifold 21 is adjusted, so that the displacement device 5 can move or rotate, thereby driving the filter device 6 to perform corresponding moving or rotating operations on the intake manifold 21. This process can be used to clean the outer wall of the intake manifold 21 and the inner wall of the exhaust manifold 11 to ensure the cleanliness and maintenance of the pipeline interior.

[0097] Specifically, through the coordinated operation of the adjusting gear 521, the rotating gear 522, and the adjusting gear ring 523, the movement mode of the displacement device 5 can be accurately controlled, thereby effectively cleaning the inner and outer walls of the intake manifold 21 and the exhaust manifold 11. This adjustment mechanism provides a flexible movement mode, enabling the device to operate stably under complex working conditions and meet the requirements of pipeline cleaning.

[0098] In this embodiment, the filter device 6 includes:

[0099] Spaced inclined blocks 61, a plurality of which are annularly distributed, are fixedly connected to the side of the displacement assembly 51 away from the guide ring surface 53 and are slidably connected to the outer wall of the intake manifold 21;

[0100] Filter assemblies 62, a plurality of which are annularly distributed, are spaced from the spaced inclined blocks 61;

[0101] Extension ring 63, arranged on the side of the filter assembly 62 away from the displacement assembly 51;

[0102] The inner wall cleaning member 64 is slidably arranged on the extension ring 63 and fits with the interior of the exhaust branch pipe 11.

[0103] That is to say, when the gas enters the exhaust branch pipe 11, under the guiding action of the guiding ring surface 53, the gas flows towards the filtering device 6. Under the filtering action of the filtering assembly 62, large particle impurities in the gas are intercepted and micro dust is filtered. When the displacement device 5 drives the filtering device 6 to move on the intake branch pipe 21, the inner wall of the exhaust branch pipe 11 is cleaned by the inner wall cleaning member 64. At this time, the inner wall cleaning member 64 moves to the filtering assembly 62 through the extension ring 63, so that the gas is directly guided by the inner wall cleaning member 64 to flow towards the filtering assembly 62 during transportation, preventing the gas from driving dust impurities to accumulate at the inner wall cleaning member 64. When it is necessary to clean the outer wall of the filtering assembly 62, the inner wall cleaning member 64 moves on the extension ring 63 and disengages from the filtering assembly 62, so as to facilitate the cleaning device 7 to remove large particle impurities outside the filtering assembly 62.

[0104] In this embodiment, the filtering assembly 62 includes:

[0105] A plurality of filter elements 621 are arranged step by step from the displacement assembly 51 to the extension ring 63 and fit with the outer wall of the intake branch pipe 21.

[0106] An outer filter screen 622 is arranged on the outer ring of the filter element 621 and on the ring surfaces where each filter element 621 contacts the gas.

[0107] That is to say, under the action of the outer filter screen 622, large particle impurities in the gas are intercepted, and the large particle impurities adhere to the outer filter screen 622. Subsequently, they are regularly cleaned by the cleaning device 7. Under the action of the filter element 621, the gas is further filtered to remove micro impurities. And the plurality of filter elements 621 arranged step by step can not only perform multi-stage filtering on the gas, but also filter the accumulated dust impurities when the inner wall cleaning member 64 cleans the inner wall of the exhaust branch pipe 11.

[0108] In this embodiment, the cleaning device 7 includes:

[0109] A connecting member 71 is fixed at the bottom connection port of the exhaust branch pipe 11.

[0110] Two closed arc plates 72 are symmetrically distributed about the axis of the exhaust branch pipe 11 and are slidably arranged at the connection between the connecting member 71 and the connection port.

[0111] A cleaning and collecting box 73 is detachably connected to the bottom of the connecting member 71.

[0112] The scraping component 74 is slidably arranged inside the cleaning and collecting box 73.

[0113] That is to say, when the displacement device 5 drives the filtering device 6 to move and clean on the intake branch pipe 21, the closed arc plate 72 closes the bottom connection port of the exhaust branch pipe 11. When the outer filter screen 622 outside the filtering component 62 needs to be cleaned, the filtering device 6 moves to the connection port of the exhaust branch pipe 11. At this time, the air extraction stops, the closed arc plate 72 opens, and the outer filter screen 622 is scraped and cleaned by the scraping component 74. The large-particle impurities cleaned fall into the cleaning and collecting box 73. If the filtering component 62 needs to be replaced after long-term use, at this time, the cleaning and collecting box 73 is removed. Under the cooperation of the displacement device 5, the single filter element 621 between the spaced inclined blocks 61 is successively driven to move to the connecting piece 71, and the single filter element 621 and the outer filter screen 622 are successively removed through the connection port of the exhaust branch pipe 11 for replacement. After the replacement is completed, the cleaning and collecting box 73 is installed and reset.

[0114] In this embodiment, the scraping component 74 includes:

[0115] The lifting slideway 741 is correspondingly arranged with the connecting piece 71 and is slidably arranged up and down inside the cleaning and collecting box 73;

[0116] The control manipulator 742 is movably arranged on the lifting slideway 741;

[0117] The scraping plate 743 is fixed on the control manipulator 742 and corresponds to the bottom connection port of the exhaust branch pipe 11.

[0118] That is to say, under the action of the lifting slideway 741 and the control manipulator 742, the scraping plate 743 is driven to fit with the outer filter screen 622, and the large-particle impurities outside the outer filter screen 622 are scraped to improve the service life of the filtering component 62.

[0119] During specific implementation, first start the exhaust fan 3 and the blower 4. The gas in the mine is extracted and discharged through the exhaust mechanism 1 and the intake mechanism 2, and external air is transported into the mine. That is, the gas in the upper layer of the mine enters the exhaust branch pipe 11 through the air inlet 13, and under the filtering action of the filtering device 6, it converges into the exhaust main pipe 12 and is discharged from the exhaust fan 3. Under the action of the blower 4, external air is dispersed into the intake branch pipes 21 through the intake main pipe 22 and is transported into the mine through the air inlets 23. During the cyclic extraction and discharge of the gas, the displacement assembly 51 can drive the displacement device 5 and the filtering device 6 to rotate and move on the intake branch pipe 21. The outer wall cleaning member 54 and the inner wall cleaning member 64 clean the outer wall of the intake branch pipe 21 and the inner wall of the exhaust branch pipe 11, effectively preventing dust and impurities in the gas from accumulating on the pipe wall and affecting the transportation of the gas. As the gas is continuously extracted and discharged, too many large-particle impurities accumulate on the outer filter screen 622 of the filtering assembly 62, affecting the gas extraction efficiency. At this time, the displacement device 5 can drive the filtering device 6 to move to the connection port of the exhaust branch pipe 11. At this time, the air extraction is stopped, the closing arc plate 72 is opened, and the inner wall cleaning member 64 moves on the extension ring 63 and disengages from the filtering assembly 62. The large-particle impurities are scraped and cleaned by the scraping assembly 74, and the cleaned large-particle impurities fall into the cleaning and collection box 73. If the filtering assembly 62 needs to be replaced after long-term use, the cleaning and collection box 73 is removed at this time. With the cooperation of the displacement device 5, the single filter element 621 between the spaced inclined blocks 61 is driven to move to the connecting member 71 in sequence, and the single filter element 621 and the outer filter screen 622 are removed and replaced in sequence through the connection port of the exhaust branch pipe 11. After the replacement is completed, the cleaning and collection box 73 is installed and reset. After the connection port at the bottom of the exhaust branch pipe 11 is closed by the closing arc plate 72, the gas extraction work can continue.

[0120] The above-mentioned is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A gas circulation drainage system for coal mines underground, characterized in that: Comprising: An exhaust mechanism (1), one end of which is fixedly arranged at the top of the mine, and the other end passes through the soil layer and is arranged outside the mine; An intake mechanism (2), arranged inside the exhaust mechanism (1), one end of which passes through the soil layer and the exhaust mechanism (1) and is arranged outside the mine; An exhaust fan (3), arranged outside the mine and connected to the exhaust mechanism (1); A blower (4), arranged outside the mine and connected to the intake mechanism (2); A displacement device (5), located inside the mine, movably arranged between the intake mechanism (2) and the exhaust mechanism (1), and capable of rotating around the intake mechanism (2); A filtering device (6), correspondingly arranged with the displacement device (5) and fixedly connected to the displacement device (5); A cleaning device (7), a plurality of which are distributed along the exhaust mechanism (1) inside the mine and are fixed at the bottom of the exhaust mechanism (1).

2. The gas circulation drainage system in the coal mine according to claim 1, characterized in that: The exhaust mechanism (1) includes: An exhaust branch pipe (11), fixedly arranged at the top of the mine, and a connection port corresponding to the cleaning device (7) is arranged at the bottom of the exhaust branch pipe (11); An exhaust main pipe (12), one end of which is connected to the exhaust branch pipe (11), and the other end passes through the soil layer and is connected to the exhaust fan (3); A plurality of air suction ports (13) are distributed along the exhaust branch pipe (11) and fixedly connected to the exhaust branch pipe (11), and the air suction ports (13) are located in the upper layer of the mine, and a conical guiding surface is arranged at the air inlet of the air suction ports (13).

3. A gas circulation drainage system for coal mines underground according to claim 2, characterized in that: The intake mechanism (2) includes: An intake branch pipe (21), arranged inside the exhaust branch pipe (11); An intake main pipe (22), arranged inside the exhaust main pipe (12), one end of which is connected to the intake branch pipe (21), and the other end passes through the exhaust main pipe (12) and is connected to the blower (4); An air inlet (23), correspondingly arranged with the air suction port (13), arranged below the air suction port (13), located in the middle and lower layers of the mine, and the air inlet (23) is connected to the intake branch pipe (21), and a conical diffusing surface is arranged at the air outlet of the air inlet (23).

4. The gas circulation drainage system for coal mines underground according to claim 3, wherein: The displacement device (5) includes: A displacement component (51), arranged on the outer wall of the intake branch pipe (21) and located inside the exhaust branch pipe (11); An adjustment component (52), arranged outside the displacement component (51); A guiding ring surface (53), one end of which is fixedly connected to the side of the displacement component (51) close to the air suction port (13), and the other end is slidably connected to the intake branch pipe (21); An outer wall cleaning member (54), arranged at the connection between the guiding ring surface (53) and the intake branch pipe (21).

5. A gas circulation drainage system for coal mines underground according to claim 4, characterized in that: The displacement component (51) includes: Two positioning ring bodies (511) are symmetrically distributed and arranged on the outer wall of the intake branch pipe (21), and the outer sides of the positioning ring bodies (511) are respectively fixedly connected to the filtering device (6) and the guiding ring surface (53); A limiting inner ring (512), fixed between the positioning ring bodies (511) and having a gap with the intake branch pipe (21), and a plurality of annularly distributed notches are arranged on the limiting inner ring (512); A limiting outer ring (513), fixed between the positioning ring bodies (511) and located outside the limiting inner ring (512); The roller mechanism (514), there are multiple annularly distributed, rotatably arranged inside the limit outer ring (513), and pass through the notch on the limit inner ring (512) to fit with the intake manifold (21); The closing ring (515), fixed on the outer ring of the positioning ring body (511).

6. The gas circulation drainage system for underground coal mines according to claim 5, wherein: The adjusting assembly (52) includes: The adjusting gear (521), rotatably arranged outside the limit outer ring (513), fixedly connected to the roller mechanism (514); The rotating gear (522), rotatably arranged outside the limit outer ring (513), and connected to the rotating motor arranged between the limit outer ring (513) and the limit inner ring (512); The adjusting gear ring (523), rotatably arranged between the limit outer ring (513) and the closing ring (515), and meshed with the adjusting gear (521) and the rotating gear (522).

7. A gas circulation drainage system for coal mines underground according to claim 4, characterized in that: The filtering device (6) includes: The spaced inclined blocks (61), there are multiple annularly distributed, fixedly connected to the side of the displacement assembly (51) away from the diversion ring surface (53), and slidably connected to the outer wall of the intake manifold (21); The filtering assemblies (62), there are multiple annularly distributed, arranged at intervals with the spaced inclined blocks (61); The extension ring (63), arranged on the side of the filtering assemblies (62) away from the displacement assembly (51); The inner wall cleaning member (64), slidably arranged on the extension ring (63), and fitted with the inside of the exhaust manifold (11).

8. A gas circulation drainage system for underground coal mines according to claim 7, characterized in that: The filtering assemblies (62) include: The filter elements (621), there are multiple arranged step by step from the displacement assembly (51) to the extension ring (63), and fitted with the outer wall of the intake manifold (21); The outer filter screen (622), arranged on the outer ring of the filter elements (621) and on the ring surfaces where each filter element (621) contacts the gas.

9. The coal mine underground gas circulation drainage system according to claim 2, characterized in that: The cleaning device (7) includes: The connecting member (71), fixed at the bottom connection port of the exhaust manifold (11); The closed arc plates (72), there are two symmetrically distributed about the axis of the exhaust manifold (11), slidably arranged at the connection between the connecting member (71) and the connection port; The cleaning collection box (73), detachably connected to the bottom of the connecting member (71); The scraping assembly (74), slidably arranged inside the cleaning collection box (73).

10. A gas circulation drainage system for coal mines underground according to claim 9, characterized in that: The scraping assembly (74) includes: The lifting slideway (741), corresponding to the connecting member (71), slidably arranged up and down inside the cleaning collection box (73); The control manipulator (742), movably arranged on the lifting slideway (741); The scraper (743), fixed on the control manipulator (742), and corresponding to the bottom connection port of the exhaust manifold (11).

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