Coal mine gas drilling and extraction equipment

Abstract

The present invention provides a coal mine gas drilling and extraction device, which relates to the technical field of coal mine gas extraction equipment, including: a row of equidistantly spaced dredging short shafts are welded on the long rod section of the L-shaped slide rod, the dredging short shafts and the spray holes are located on the same axial center line, and the two rows of dredging short shafts are interlaced and matched with the two rows of spray holes when sliding away from each other; a T-shaped drive rod is slidably installed through the center of the bottom plate of the flat rectangular water spray pipe, and two connecting rods are symmetrically connected to the T-shaped drive rod by rotation between the two L-shaped slide rods; a tension spring is hung between the two L-shaped slide rods; a ferrule is threadedly fastened on the middle position of the motor housing, and the tail end of the T-shaped drive rod is in contact with the ferrule. The present invention only requires a simple operation of sliding the flat rectangular water spray pipe toward the inside of the air duct, which can drive the two L-shaped slide rods to slide towards each other and interlace with the two rows of spray holes, thereby clearing and unblocking the spray dust suppression component. The operation is simple and efficient.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine gas drainage equipment, and in particular to coal mine gas drilling and drainage equipment. Background Art

[0002] Coal mine gas drilling and drainage equipment is one of the most important tools used in coal mine gas drainage operations. Coal mine gas drilling and drainage is of great significance in improving coal mine production safety, reducing the occurrence of gas explosion accidents, improving the working environment of miners, and recycling gas resources.

[0003] The existing gas extraction equipment mostly uses a nozzle to implement spray dust reduction on the coal powder mixed in the extracted gas. The atomizing nozzles on the nozzles are small and easily clogged by coal powder, resulting in the need to frequently disassemble the nozzles for clearing the blockage. The operation is relatively troublesome and inconvenient. Moreover, when the nozzles are disassembled for clearing the blockage, the gas extraction equipment needs to be shut down, resulting in the occupation of the normal production and use time of the gas extraction equipment, which indirectly reduces the production and use efficiency of the gas extraction equipment. In addition, the water mist sprayed from the nozzles has a small mass and low injection impact potential energy, making it difficult to resist the gas airflow formed by the gas extraction equipment. As a result, the water mist cannot be fully diffused and filled in the gas suction airflow, affecting the spray dust reduction effect on the gas. Summary of the Invention

[0004] In view of this, the present invention provides a coal mine gas drilling and extraction equipment to solve the problem that the water mist sprayed from the nozzle has a small mass and low injection impact potential energy, which makes it difficult to resist the gas airflow formed by the gas extraction equipment, resulting in the water mist being unable to fully diffuse and fill the gas suction airflow, affecting the spray dust reduction effect on the gas.

[0005] The technical solution proposed in the present invention is: a coal mine gas drilling and drainage equipment, specifically comprising: a drainage pipe and a wind tube, wherein the head end of the drainage pipe is inserted into a pre-drilled hole in the coal seam for gas drainage, and the wind tube is connected to the tail end of the drainage pipe;

[0006] A motor is fixedly installed at the inner center of the air duct, and impellers are installed at the front and rear ends of the motor shaft; a circle of flat rectangular water spray pipes arranged around the middle position of the circumferential side wall of the air duct is pushed through and slidably installed by a spring, and a circle of flat rectangular water spray pipes is located between the two impellers; two rows of spray holes are symmetrically opened on the two narrow side walls of the flat rectangular water spray pipe, and the two rows of spray holes are respectively facing the two impellers; two L-shaped sliding rods are symmetrically installed inside the flat rectangular water spray pipe, and the long rod section of the L-shaped sliding rod is A row of equidistantly spaced dredge short shafts are welded thereon, and the dredge short shafts and the spray holes are located on the same axial line. When the two rows of dredge short shafts slide away from each other, they intersect and cooperate with the two rows of spray holes; a T-shaped drive rod is slidably installed through the center of the bottom plate of the flat rectangular water spray pipe, and two connecting rods are symmetrically connected to the T-shaped drive rod for rotation; a tension spring is hung between the two L-shaped slide rods; a ring is threadedly fastened on the middle position of the motor housing, and the tail end of the T-shaped drive rod is in contact with the ring.

[0007] Further,

[0008] The tail end of the extraction and discharge pipe is welded with a wind collecting cover, and the head end of the wind tube and the tail end of the wind collecting cover are welded and fixed together.

[0009] Further,

[0010] The cross section of the L-shaped sliding rod is a square structure, and the short rod section of the L-shaped sliding rod is slidably matched with the tail end portion of the narrow side wall of the flat rectangular water spray pipe.

[0011] Further,

[0012] The tail ends of the two connecting rods are correspondingly connected to the vertical bending parts of the two L-shaped sliding rods, and the head ends are correspondingly connected to the two ends of the short rod section of the T-shaped driving rod.

[0013] Further,

[0014] The short rod sections of the two L-shaped sliding rods are welded with lifting ears on one side facing the T-shaped driving rod, and the head and tail ends of the tension spring are fixedly connected to the two lifting ears accordingly.

[0015] Further,

[0016] A water distribution ring is welded on the head end of the air duct, a water inlet nozzle is welded on the circumferential side wall of the outer ring of the water distribution ring, a water inlet hose is connected to the water inlet nozzle, and the water inlet hose is connected to an external pressurized water supply system.

[0017] Further,

[0018] A water collecting cover is welded to the tail end of the flat rectangular water spray pipe, and a water guide hose is connected between the water collecting cover and the water distribution ring.

[0019] Further,

[0020] A circle of anti-slip strip is welded around the outer side of the circumferential side wall of the head end of the extraction and discharge pipe, and a row of teeth is provided on the anti-slip strip;

[0021] A conical plugging cover is welded and sleeved on the middle section of the extraction and discharge pipe, and the conical plugging cover is plugged and matched with the opening of the first end of the drilled hole.

[0022] Furthermore, two T-shaped mounting rods are symmetrically welded to the head end of the motor housing, and the tail ends of the two T-shaped mounting rods are threadedly fastened to the inner side of the circumferential side wall of the wind tube.

[0023] The coal mine gas drilling and drainage equipment provided by the present invention has the following beneficial effects:

[0024] 1. The flat rectangular water spray pipe can be used together with the high-speed rotating striking function of the two impellers to serve as a spray dust reduction component. The diameters of the two rows of spray holes on the flat rectangular water spray pipe are relatively large, which makes the spray dust reduction component composed of the flat rectangular water spray pipe not easy to be blocked. Compared with the existing technology, it can save the trouble of frequently clearing the spray dust reduction component and is easy to operate and use.

[0025] 2. A circle of flat rectangular water spray pipes is inserted in the interior of the wind tube, which allows the circle of flat rectangular water spray pipes to be evenly arranged in the gas suction airflow flowing through the wind tube. The circle of flat rectangular water spray pipes serves as a component for spraying water to the two impellers. It is evenly arranged in the gas suction airflow, which allows the two impellers to form six spray areas in different directions in the circumferential space of the gas suction airflow, so that the water mist formed by the two impellers can be more comprehensively diffused and filled in the gas airflow. Compared with the existing technology, it can implement comprehensive, thorough and effective dust reduction on the gas airflow, which helps to improve the spray dust reduction effect on gas.

[0026] 3. The present invention only requires a simple operation of sliding the flat rectangular water spray pipe toward the inside of the air duct, which can drive the two L-shaped slide bars to slide toward each other and intersperse with the two rows of spray holes to clear the blockage of the spray dust suppression component. The operation is simple and efficient.

[0027] Fourth, the operation of sliding the flat rectangular water spray pipe toward the inside of the air duct is not restricted by the operating status of the motor and the two impellers. Regardless of whether the motor and the two impellers are running or not, the flat rectangular water spray pipe can be driven to slide freely. This allows the unblocking and dredging operations of the spray dust reduction component to be carried out during the normal operation of the extraction equipment. Compared with the existing technology, it does not occupy the normal operating time of the equipment, which helps to indirectly improve the production efficiency of the extraction equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0029] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0030] Figure 1 Shows a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It shows a schematic structural diagram of the head end of the extraction and discharge pipe of the present invention;

[0032] Figure 3 A schematic diagram of the inner structure of a half-section of the extraction and discharge pipe of the present invention is shown;

[0033] Figure 4 A schematic diagram of the inner structure of a half-section of the air duct of the present invention is shown;

[0034] Figure 5 Shows a schematic diagram of the impeller structure of the present invention;

[0035] Figure 6 Shows a schematic diagram of the motor structure of the present invention;

[0036] Figure 7 A schematic diagram of the inner side structure of a half-section of a flat rectangular water spray pipe according to the present invention is shown;

[0037] Figure 8 A schematic diagram of the L-shaped sliding rod structure of the present invention is shown.

[0038] List of reference numerals:

[0039] 1. Extraction and discharge pipe; 101. Conical plug cover; 102. Anti-slip strip; 103. Wind collecting cover;

[0040] 2. Hair dryer;

[0041] 3. Motor; 301. Impeller; 302. Ferrule; 303. T-shaped mounting rod;

[0042] 4. Flat rectangular water spray pipe; 401. Water collecting cover; 402. Spray hole; 403. L-shaped slide bar; 4031. Dredging short shaft; 4032. Connecting rod; 4033. T-shaped drive rod; 4034. Tension spring; 4035. Lifting lug;

[0043] 5. Water distribution ring; 501. Water inlet nozzle. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Please refer to Figures 1 to 8 , Example 1:

[0046] The present invention provides a coal mine gas drilling and drainage device, comprising: a drainage pipe 1, a conical blocking cover 101, an anti-slip strip 102, a wind collecting cover 103, a blower 2, a motor 3, an impeller 301, a ferrule 302, a T-shaped mounting rod 303, a flat rectangular water spray pipe 4, a water collecting cover 401, a spray hole 402, an L-shaped sliding rod 403, a dredging short shaft 4031, a connecting rod 4032, a T-shaped driving rod 4033, a tension spring 4034, a lifting lug 4035, a water distribution ring 5, and a water inlet nozzle 501. The head end portion of the drainage pipe 1 is inserted into a pre-drilled hole in the coal seam for gas drainage, and the blower 2 is connected to the tail end of the drainage pipe 1.

[0047] A motor 3 is fixedly installed at the inner center of the air duct 2, and impellers 301 are installed at the front and rear ends of the rotating shaft of the motor 3; a circle of flat rectangular water spray pipes 4 arranged around the middle position of the circumferential side wall of the air duct 2 is slidably installed through the spring push, and the circle of flat rectangular water spray pipes 4 is located between the two impellers 301; two rows of spray holes 402 are symmetrically opened on the two narrow side walls of the flat rectangular water spray pipe 4, and the two rows of spray holes 402 are respectively facing the two impellers 301; two L-shaped sliding rods 403 are symmetrically installed inside the flat rectangular water spray pipe 4 for sliding, and a row of equidistantly spaced dredging short shafts 4031 are welded on the long rod section of the L-shaped sliding rod 403, and the dredging short shafts 4031 and the spray holes 402 are located on the same axial center line. When the two rows of dredging short shafts 4031 slide away from each other, they will contact the two rows of spray holes 40 2 interlaced cooperation; a T-shaped driving rod 4033 is slidably installed through the center of the bottom plate of the flat rectangular water spray pipe 4, and two connecting rods 4032 are symmetrically connected to the two L-shaped sliding rods 403 and the T-shaped driving rod 4033 for rotation; a tension spring 4034 is hung between the two L-shaped sliding rods 403; a ferrule 302 is threadedly fastened on the middle position of the motor 3 housing, and the tail end of the T-shaped driving rod 4033 is in contact with the ferrule 302; a water distribution ring 5 is welded on the head end part of the wind tube 2, and a water inlet nozzle 501 is welded on the circumferential side wall of the outer ring of the water distribution ring 5, and a water inlet hose is connected to the water inlet nozzle 501, which is connected to an external pressurized water supply system; a water collecting cover 401 is welded on the tail end of the flat rectangular water spray pipe 4, and a water guide hose is connected between the water collecting cover 401 and the water distribution ring 5;

[0048] The motor 3 and the two impellers 301 together form a fan. Through the extraction pipe 1, the fan can suck and discharge the gas in the borehole. When the fan sucks and discharges the gas in the borehole, a gas suction airflow is formed in the extraction pipe 1 and the wind tube 2. Through the two impellers 301, the fan can implement double compound suction on the gas, effectively improving the suction and discharge volume of the gas. The pressurized water in the external pressurized water supply system is sequentially introduced into the flat rectangular water spray pipe 4 through the water inlet hose, the water inlet nozzle 501, the water distribution ring 5, the water guide hose and the water collecting cover 401. Through the two rows of spray holes 402, the flat rectangular water spray pipe 4 can The internal pressurized water is sprayed onto the two impellers 301 respectively. The two high-speed rotating impellers 301 can implement rotational striking on the pressurized water sprayed thereon, breaking up the pressurized water into a water mist to implement dust reduction on the gas suction airflow flowing through the air duct 2. Then, the flat rectangular water spray pipe 4 is used together with the high-speed rotating striking function of the two impellers 301 to act as a spray dust reduction component. The diameters of the two rows of spray holes 402 on the flat rectangular water spray pipe 4 are relatively large, which makes the spray dust reduction component composed of the flat rectangular water spray pipe 4 not easily clogged. Compared with the existing technology, it can save the trouble of frequently clearing the spray dust reduction component and is convenient to operate and use.

[0049] A circle of flat rectangular water spray pipes 4 is inserted around the interior of the air duct 2. This allows the circle of flat rectangular water spray pipes 4 to be evenly arranged around the gas suction airflow flowing through the air duct 2. The circle of flat rectangular water spray pipes 4 serves as a component for spraying water to the two impellers 301. Its even arrangement around the gas suction airflow allows the two impellers 301 to form six spray areas in different directions in the circumferential space of the gas suction airflow. The water mist formed by the two impellers 301 can be more comprehensively diffused and filled in the gas airflow. Compared with the existing technology, it can implement comprehensive and effective dust reduction on the gas airflow, which helps to improve the spray dust reduction effect on gas gas.

[0050] The two connecting rods 4032, the T-shaped driving rod 4033 and the two L-shaped sliding rods 403 are connected together to form two crank slider mechanisms. Through these two mechanisms, the T-shaped driving rod 4033 is slid toward the inside of the flat rectangular water spray pipe 4, which can push and drive the two L-shaped sliding rods 403 to stretch the tension springs 4034 away from each other, thereby controlling the two rows of dredging short shafts 4031 to intersect and cooperate with the two rows of spray holes 402, thereby dredging and clearing the two rows of spray holes 402; because the tail end of the T-shaped driving rod 4033 abuts against the ring 302 When the flat rectangular water spray pipe 4 is in contact and then slides toward the inside of the wind tube 2, the collar 302 can push back to drive the T-shaped driving rod 4033 to slide toward the inside of the flat rectangular water spray pipe 4, controlling the two rows of dredging short shafts 4031 to slide away from each other to dredge the two rows of spray holes 402. When the flat rectangular water spray pipe 4 is driven to slide toward the inside of the wind tube 2, the spring on it is compressed. When the flat rectangular water spray pipe 4 is released, the spring on the flat rectangular water spray pipe 4 automatically rebounds to drive the flat rectangular water spray pipe 4 to slide toward the outside of the wind tube 2 and reset. When the flat rectangular water spray pipe 4 slides back to its original position, the tension spring 4034 loses the tensile holding force from the flat rectangular water spray pipe 4, and can automatically rebound and pull to drive the two L-shaped slide bars 403 to slide close to each other, controlling the two rows of dredging short shafts 4031 to be reset to a state separated from the two rows of spray holes 402. Then, the present invention only needs to slide the flat rectangular water spray pipe 4 toward the inside of the wind tube 2 in a simple operation, which can drive the two L-shaped slide bars 403 to slide toward each other and intersperse with the two rows of spray holes 402 to clear the blockage of the spray dust suppression component. The unblocking operation is simple and efficient, and the operation of the flat rectangular water spray pipe 4 sliding toward the inside of the wind tube 2 is not restricted by the operating status of the motor 3 and the two impellers 301. Regardless of whether the motor 3 and the two impellers 301 are running or not, the flat rectangular water spray pipe 4 can be driven to slide freely, which makes it possible to carry out the unblocking operation of the spray dust reduction component during the normal operation of the pumping equipment. Compared with the existing technology, it does not occupy the normal operating time of the equipment, which helps to indirectly improve the production efficiency of the pumping equipment.

[0051] Preferably,

[0052] The tail end of the extraction and discharge pipe 1 is welded with a wind collecting cover 103 , and the head end of the wind tube 2 is welded and fixed to the tail end of the wind collecting cover 103 .

[0053] Preferably,

[0054] The cross section of the L-shaped slide rod 403 is a square structure, and the short rod section of the L-shaped slide rod 403 penetrates and slides with the tail end portion of the narrow side wall of the flat rectangular water spray pipe 4.

[0055] Preferably,

[0056] The tail ends of the two connecting rods 4032 are rotatably connected to the vertical bending parts of the two L-shaped sliding rods 403, and the head ends are rotatably connected to the two ends of the short rod section of the T-shaped driving rod 4033.

[0057] Preferably,

[0058] On the short rod sections of the two L-shaped sliding rods 403 , a lifting lug 4035 is welded on one side facing the T-shaped driving rod 4033 , and the head and tail ends of the tension spring 4034 are fixedly connected to the two lifting lugs 4035 .

[0059] Preferably,

[0060] Two T-shaped mounting rods 303 are symmetrically welded to the head end of the motor 3 housing, and the tail ends of the two T-shaped mounting rods 303 are threadedly fastened to the inner side of the circumferential side wall of the air cylinder 2 .

[0061] Based on the first embodiment, the second embodiment:

[0062] A circle of anti-slip strips 102 are welded around the outer side of the circumferential side wall of the head end of the extraction and discharge pipe 1, and a row of teeth are provided on the anti-slip strips 102; a conical plug cover 101 is welded and sleeved on the middle section of the extraction and discharge pipe 1, and the conical plug cover 101 is plugged into the head end opening of the drilled hole;

[0063] A circle of anti-slip strips 102 is in frictional contact with the inner wall of the borehole, which can position the extraction pipe 1 and the conical plug cover 101, fix the extraction pipe 1 in the borehole, and fix the conical plug cover 101 on the first end opening of the borehole; the conical plug cover 101 is used to plug and seal the first end opening of the borehole.

[0064] Working principle: A circle of anti-slip strips 102 frictionally contacts the inner wall of the borehole, positioning the extraction pipe 1 and the conical plug cover 101, securing the extraction pipe 1 in the borehole and the conical plug cover 101 at the head opening of the borehole; the conical plug cover 101 is used to plug and seal the head opening of the borehole;

[0065] The motor 3 and the two impellers 301 together form a fan. Through the extraction pipe 1, the fan can suck and discharge the gas in the borehole. When the fan sucks and discharges the gas in the borehole, a gas suction airflow is formed in the extraction pipe 1 and the air duct 2. Through the two impellers 301, the fan can implement double compound suction of the gas, effectively improving the suction and discharge rate of the gas. The pressurized water in the external pressurized water supply system is sequentially introduced into the flat rectangular water spray pipe 4 through the water inlet hose, the water inlet nozzle 501, the water distribution ring 5, the water guide hose and the water collecting cover 401. Through the two rows of spray holes 402, the flat rectangular water spray pipe 4 can spray the pressurized water introduced into it onto the two impellers 301 respectively. The two high-speed rotating impellers 301 can rotate and strike the pressurized water sprayed thereon, and the pressurized water is impacted and dispersed to form water mist to reduce dust on the gas suction airflow flowing through the air duct 2.

[0066] A circle of flat rectangular water spray pipes 4 is inserted around the interior of the wind tube 2. This allows the circle of flat rectangular water spray pipes 4 to be evenly arranged around the gas suction airflow flowing through the wind tube 2. The circle of flat rectangular water spray pipes 4 serves as a component for spraying water to the two impellers 301. Its even arrangement around the gas suction airflow allows the two impellers 301 to form six spray areas in different directions within the circumferential space of the gas suction airflow. The water mist generated by the two impellers 301 can be more comprehensively diffused and filled in the gas airflow. Compared with the existing technology, it can implement comprehensive and effective dust reduction on the gas airflow.

[0067] The two connecting rods 4032, the T-shaped driving rod 4033 and the two L-shaped sliding rods 403 are connected together to form two crank slider mechanisms. Through these two mechanisms, the T-shaped driving rod 4033 is slid toward the inside of the flat rectangular water spray pipe 4, which can push and drive the two L-shaped sliding rods 403 to stretch the tension springs 4034 to slide away from each other, thereby controlling the two rows of dredging short shafts 4031 to intersperse and cooperate with the two rows of spray holes 402, and dredge and clear the blockage of the two rows of spray holes 402; because the tail end of the T-shaped driving rod 4033 is in contact with the ring 302, and then when the flat rectangular water spray pipe 4 is slid toward the inside of the wind tube 2, the ring 302 can push back and drive the T-shaped driving rod 4033 toward the flat rectangular water spray pipe 4 The internal sliding of the flat rectangular water spray pipe 4 controls the two rows of dredging short shafts 4031 to slide away from each other to dredge the two rows of spray holes 402. The flat rectangular water spray pipe 4 compresses the spring thereon when being driven to slide toward the inside of the wind tube 2. When the flat rectangular water spray pipe 4 is released, the spring on the flat rectangular water spray pipe 4 automatically rebounds and drives the flat rectangular water spray pipe 4 to slide toward the outside of the wind tube 2 and reset. When the flat rectangular water spray pipe 4 slides and resets, the tension spring 4034 loses the tensile holding force from the flat rectangular water spray pipe 4, and can automatically rebound and pull to drive the two L-shaped slide bars 403 to slide close to each other, controlling the two rows of dredging short shafts 4031 to reset to a state separated from the two rows of spray holes 402.

[0068] In this article, there are several points to note:

[0069] 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0070] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0071] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A coal mine gas drilling and drainage device, comprising: A drainage pipe (1) and a wind tube (2), wherein the head end of the drainage pipe (1) is inserted into a pre-drilled hole on the coal seam for draining gas, and the wind tube (2) is connected to the tail end of the drainage pipe (1); The invention is characterized in that a motor (3) is fixedly installed at the inner center of the wind tube (2), and impellers (301) are mounted on both the front and rear ends of the rotating shaft of the motor (3); a circle of flat rectangular water spray pipes (4) arranged around the middle position of the circumferential side wall of the wind tube (2) is slidably installed through the spring push, and the circle of flat rectangular water spray pipes (4) is located between the two impellers (301); two rows of spray holes (402) are symmetrically opened on the two narrow side walls of the flat rectangular water spray pipe (4), and the two rows of spray holes (402) are respectively facing the two impellers (301); two L-shaped sliding rods (403) are symmetrically slidably installed inside the flat rectangular water spray pipe (4), and a row of equidistantly spaced holes are welded on the long rod section of the L-shaped sliding rod (403). A dredging short shaft (4031) is provided, and the dredging short shaft (4031) and the spray hole (402) are located on the same axis. When the two rows of dredging short shafts (4031) slide away from each other, they are interlaced with the two rows of spray holes (402); a T-shaped driving rod (4033) is slidably installed through the center of the bottom plate of the flat rectangular water spray pipe (4), and two connecting rods (4032) are symmetrically connected to the T-shaped driving rod (4033) for rotation; a tension spring (4034) is hung between the two L-shaped sliding rods (403); a ring (302) is threadedly fastened to the middle position of the motor (3) housing, and the tail end of the T-shaped driving rod (4033) is in contact with the ring (302).

2. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: The tail end of the extraction and discharge pipe (1) is welded with a wind collecting cover (103), and the head end of the wind tube (2) and the tail end of the wind collecting cover (103) are welded and fixed together.

3. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: The cross section of the L-shaped slide rod (403) is a square structure, and the short rod section of the L-shaped slide rod (403) is slidably fitted through the tail end portion of the narrow side wall of the flat rectangular water spray pipe (4).

4. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: The tail ends of the two connecting rods (4032) are correspondingly connected to the vertical bending parts of the two L-shaped sliding rods (403), and the head ends are correspondingly connected to the two ends of the short rod section of the T-shaped driving rod (4033).

5. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: A lifting lug (4035) is welded on one side of the short rod section of the two L-shaped sliding rods (403) facing the T-shaped driving rod (4033), and the head and tail ends of the tension spring (4034) are fixedly connected to the two lifting lugs (4035) respectively.

6. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: A water distribution ring (5) is welded onto the head end of the wind tube (2), a water inlet nozzle (501) is welded onto the circumferential side wall of the outer ring of the water distribution ring (5), and a water inlet hose is connected to the water inlet nozzle (501), and the water inlet hose is connected to an external pressurized water supply system.

7. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: A water collecting cover (401) is welded to the tail end of the flat rectangular water spray pipe (4), and a water guide hose is connected between the water collecting cover (401) and the water distribution ring (5).

8. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: A circle of anti-slip strips (102) is welded around the outer side of the circumferential side wall of the head end portion of the extraction and discharge pipe (1), and a row of teeth is provided on the anti-slip strips (102); A conical plug cover (101) is welded onto the middle section of the extraction and discharge pipe (1), and the conical plug cover (101) is plugged into and fitted with the opening of the first end of the drilled hole.

9. The coal mine gas drilling and drainage equipment according to claim 1, characterized in that: Two T-shaped mounting rods (303) are symmetrically welded to the head end of the motor (3) housing, and the tail ends of the two T-shaped mounting rods (303) are threadedly fastened to the inner side of the circumferential side wall of the wind tube (2).

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