Automatic water and slag discharging device for coal mine gas extraction downward drilling

Abstract

The coal mine gas extraction downward drilling automatic water and slag discharging device comprises a water and slag discharging mechanism, a separating mechanism and a mounting bottom plate, and the water and slag discharging mechanism comprises a fan, a gas outlet pipe, a hollow plate, a connecting pipe, an air inlet pipe, a water and slag discharging pipe, a communicating pipe, a gas extraction pipe and a discharging pipe which are fixedly connected to the upper surface of the mounting bottom plate; and the separating mechanism is connected with the discharging pipe. Water and slag are pressed into the water and slag discharging pipe together through high-pressure airflow generated by the fan and flow into the discharging pipe through the communicating pipe and the gas extraction pipe, after the water and slag are basically cleaned, the bottom of the water and slag discharging pipe is not submerged by water and is exposed to the outside, and high-pressure gas is continuously injected into the air inlet pipe subsequently; and gas is driven to flow into the discharging pipe from the water slag discharging pipe, the communicating pipe and the gas extraction pipe together, so that flexible and quick switching between water slag discharging work and gas extraction work can be realized without multiple sets of equipment.

Description

Technical Field

[0001] This invention belongs to the field of coal mine construction technology and relates to an automatic drainage and slag removal device for downward drilling in coal mine gas extraction. Background Technology

[0002] In the process of coal mine construction, in order to effectively control the gas in the coal mine, coal mine gas extraction devices are generally used to extract the gas. Coal mine gas extraction involves drilling into the coal seam and gas accumulation area, connecting the drill hole to a dedicated pipeline, and using extraction equipment to extract the gas from the coal seam and goaf to the surface for utilization; or discharging it into the main return airflow. Gas extraction is not only an important measure to reduce the amount of gas emitted during the mining process, prevent gas exceedances and accumulation, and prevent gas explosions and coal and gas outburst accidents, but it can also turn harm into benefit by developing and utilizing it as a resource associated with coal.

[0003] Current gas extraction technology typically involves drilling holes into the coal seam using a directional drilling rig, and then extracting and collecting the gas from the borehole using a gas extraction pipe. When there is water or coal slag at the bottom of the borehole, especially in larger holes, it can affect the effective extraction of gas. In this case, water pumping equipment or coal slag cleaning equipment is needed to clean the water and slag from the hole. Only after the water pumping equipment is removed from the hole can the gas extraction pipe be released for gas collection. Furthermore, during the operation of the gas extraction pipe, water or coal slag may fall into the hole, requiring further water and slag cleaning. This makes the overall gas extraction process cumbersome and inefficient. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an automatic drainage and slag removal device for downward drilling in coal mine gas extraction, which solves the problems of cumbersome and inefficient existing gas extraction procedures.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An automatic drainage and slag removal device for downward drilling in coal mine gas extraction includes a slag removal mechanism, a separation mechanism, and a mounting base plate; The slag drainage mechanism includes a fan fixed to the mounting base plate, an air outlet pipe connected to the fan, a hollow plate connected to the upper end of the air outlet pipe, a set of downwardly angled connecting pipes connected to the hollow plate, a vertical air inlet pipe connected to the middle of the connecting pipes and the lower end of the air inlet pipe can communicate with a drill hole, the lower end of the connecting pipes is sealed and connected to a slag drainage pipe and the lower end of the slag drainage pipe can communicate with the drill hole; a discharge pipe is provided above the mounting base plate and supported by multiple support plates fixed to the mounting base plate, a set of downwardly angled gas extraction pipes connected to the discharge pipe, the lower end of the gas extraction pipes is sealed, and a vertical connecting pipe is connected to the middle of the gas extraction pipes, the number and position of the connecting pipes and the slag drainage pipes correspond one-to-one, and the bottom end of the connecting pipe is connected to the upper part of the slag drainage pipe; The separation mechanism includes a separation tank fixed to the upper surface of the mounting base plate. The separation tank is connected to the discharge pipe through an inlet pipe. A drain pipe is connected to the lower part of one side of the separation tank, and an electric valve is installed on the drain pipe. An exhaust pipe for gas discharge and collection is installed at the top of the separation tank.

[0006] The present invention also includes the following technical features: Specifically, the drainage slag pipe is equipped with a water level sensing and control component and a water slag discharge component. The water level sensing and control component can control the operation of the water slag discharge component according to the water level difference, and transport and discharge the accumulated water and coal slag in the borehole.

[0007] Specifically, the water level sensing and control component includes a hollow tube fixedly connected to the surface of the drainage slag pipe. The hollow tube is vertically arranged, and a spherical float is slidably connected inside the hollow tube. A control switch is provided at the top of the hollow tube, which can control the automatic operation of the water slag discharge component.

[0008] Specifically, the water slag discharge assembly includes a drive motor located at the top of the inside of the drainage slag pipe, and a screw rod is fixedly connected to the output end of the drive motor. The screw rod is arranged along the axial direction of the drainage slag pipe and extends to the bottom opening of the drainage slag pipe.

[0009] Specifically, the blade surface of the spiral rod is provided with multiple sets of rotary cutting elements, and the surface of the rotary cutting elements is provided with multiple sets of barbed blocks.

[0010] Specifically, the lower side of the separator is provided with an opening, and a sealing plate is slidably connected to the opening of the separator. The sealing plate can slide longitudinally to open or close the opening of the separator.

[0011] Specifically, a servo motor is installed on the separation tank corresponding to the top of the sealing plate, and threaded rods and guide rods are respectively provided on both sides of the sealing plate. The top end of the threaded rod is connected to the output end of the servo motor, the threaded rod is threadedly connected to the sealing plate, and the guide rod is slidably connected to the sealing plate.

[0012] Compared with the prior art, the present invention has the following technical effects: This invention relates to an automatic drainage and slag removal device for downward drilling in coal mine gas extraction. High-pressure airflow generated by a blower forces water and slag into the drainage slag pipe, which then flows into the discharge pipe through a connecting pipe and a gas extraction pipe. Once the water and slag are mostly removed, the bottom of the drainage slag pipe is no longer submerged and is exposed to the outside. Subsequent high-pressure gas supplied through the air inlet pipe carries the gas along with the drainage slag pipe, connecting pipe, and gas extraction pipe into the discharge pipe. This eliminates the need for multiple sets of equipment, enabling flexible and rapid switching between drainage slag removal and gas extraction operations.

[0013] This invention relates to an automatic drainage and slag removal device for downward drilling in coal mine gas extraction. When accumulated water is forced into the drainage slag pipe under the action of air pressure inside the borehole, and the water level reaches the position of the hollow pipe, the accumulated water exerts an upward buoyancy on the spherical float inside the hollow pipe. This causes the control switch to open and control the drive motor to drive the screw rod to rotate. When the screw rod rotates, it can drive the accumulated water upward, applying greater pressure to the slag, thereby promoting more efficient discharge of the slag under the dual action of air pressure and screw rod. When the water level gradually drops, the spherical float moves downward to reset, allowing the drive motor to stop working after running for a period of time, reducing unnecessary energy waste. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the structure of the connecting pipe in this invention.

[0016] Figure 3 This is a partial cross-sectional view of the slag drain pipe in this invention.

[0017] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0018] Figure 5 This is a schematic diagram of the internal structure of the hollow tube in this invention.

[0019] Figure 6 This is a schematic diagram of the structure of the sealing plate at the separation tank in the present invention in a split state.

[0020] The meanings of the labels in the diagram are as follows: 1. Mounting base plate; 2. Support plate; 3. Discharge pipe; 4. Gas extraction pipe; 5. Connecting pipe; 6. Drainage slag pipe; 7. Hollow pipe; 8. Spherical float; 9. Drive motor; 10. Spiral rod; 11. Fan; 12. Air outlet pipe; 13. Hollow plate; 14. Connecting pipe; 15. Separator tank; 16. Feed pipe; 17. Drainage pipe; 18. Electric valve; 22. Exhaust pipe; 24. Sealing plate; 25. Threaded rod; 26. Guide rod; 27. Servo motor; 28. Air inlet pipe; 29. ​​Rotary cutting component; 30. Spike block. Detailed Implementation

[0021] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0022] Example 1: like Figures 1 to 6As shown, this embodiment provides an automatic drainage and slag removal device for downward drilling in coal mine gas extraction, including a slag removal mechanism, a separation mechanism, and a mounting base plate 1; the slag removal mechanism is installed on one side of the upper surface of the mounting base plate 1, and the separation mechanism is installed on the upper surface of the mounting base plate 1.

[0023] The sludge drainage mechanism includes a fan 11 fixedly connected to the upper surface of the mounting base plate 1. An air outlet pipe 12 is fixedly connected to the upper surface of the fan 11. One end of the air outlet pipe 12 is fixedly connected to a hollow plate 13. A set of inclined connecting pipes 14 are provided on the upper surface of the hollow plate 13. The upper end of the connecting pipes 14 communicates with the interior of the hollow plate 13, and the lower end of the connecting pipes 14 is sealed. A vertically oriented air inlet pipe 28 is connected to the middle of the connecting pipes 14. The bottom of the connecting pipes 14 is fixed... A drainage slag pipe 6 is connected; several support plates 2 are fixedly connected to the upper surface of the mounting base plate 1, and a discharge pipe 3 is set on the top of the support plate 2. A set of gas extraction pipes 4 connected to the inside of the discharge pipe 3 are inclinedly set on the surface of the discharge pipe 3; the other end of the gas extraction pipe 4 is sealed, and a vertically arranged connecting pipe 5 is connected to the middle of the gas extraction pipe 4. The number and position of the connecting pipes 5 and the drainage slag pipe 6 correspond one-to-one, and the bottom end of the connecting pipe 5 is connected to the top opening of the drainage slag pipe 6.

[0024] During operation, a directional drilling rig is first used to drill holes corresponding to the positions of the air inlet pipe 28 and the drainage slag pipe 6 into the coal seam. Then, a crane is used to insert the air inlet pipe 28 and the drainage slag pipe 6 into the drilled holes (and the gaps at the top of the holes are sealed to prevent gas leakage). When there is a large amount of water or a small amount of coal slag in the hole, the water and slag will submerge the bottom of the drainage slag pipe 6. At this time, the high-pressure airflow generated by the blower 11 can pass through the hollow plate 13 and the connecting pipe 14 and be ejected from the air inlet pipe 28. As the air pressure in the hole gradually increases, the air pressure can force the water and slag into the drainage slag pipe 6, and then flow into the discharge pipe 3 through the connecting pipe 5 and the gas extraction pipe 4. When the water and slag are basically... After cleaning, the bottom of the drainage slag pipe 6 is no longer submerged in water and is exposed to the outside. The high-pressure gas that continues to be injected into the air inlet pipe 28 will carry the gas from the drainage slag pipe 6, the connecting pipe 5, and the gas extraction pipe 4 into the discharge pipe 3. Thus, the drainage slag operation and gas extraction operation can be flexibly and quickly switched without the need for multiple sets of equipment. There is no need to spend time and effort changing different equipment in the borehole. Moreover, when the gas extraction is in operation, as long as the water and slag in the hole exceed a certain amount and cover the port of the drainage slag pipe 6, the water and slag will be automatically extracted. The degree of automation is higher. The power for water and slag extraction is shared with the power for gas extraction. There is no need to set up a complex drive source, which improves the overall practicality of the device.

[0025] Furthermore, the drainage slag pipe 6 is equipped with a water level sensing control component and a water slag discharge component. The water level sensing control component can control the operation of the water slag discharge component according to the water level difference, and transport and discharge the accumulated water and coal slag in the borehole.

[0026] Specifically, the water level sensing control component includes a hollow tube 7 fixedly connected to the surface of the drainage slag pipe 6. The hollow tube 7 is vertically arranged, and a spherical float 8 is slidably connected inside the hollow tube 7. A control switch is provided at the top of the hollow tube 7, which can control the automatic operation of the water slag discharge component. The water slag discharge component includes a drive motor 9 located at the top of the drainage slag pipe 6. A screw rod 10 is fixedly connected to the output end of the drive motor 9. The screw rod 10 is arranged along the axial direction of the drainage slag pipe 6 and extends to the bottom opening of the drainage slag pipe 6.

[0027] By setting the above components, when the accumulated water is forced into the drainage slag pipe 6 under the action of air pressure inside the cavity, and the water level reaches the position of the hollow pipe 7, the accumulated water will exert an upward buoyancy on the spherical float 8 inside the hollow pipe 7, causing the spherical float 8 to move towards the top of the hollow pipe 7 and squeeze the control switch. At this time, the control switch controls the drive motor 9 to drive the screw rod 10 to rotate. When the screw rod 10 rotates, it can drive the accumulated water upward and apply greater pressure to the slag, thereby promoting more efficient discharge of the slag under the dual action of air pressure and screw rod. When the water level gradually drops, the spherical float 8 moves downward to reset and no longer squeezes the control switch, so that the drive motor 9 can stop working after running for a period of time. On the one hand, it reduces unnecessary energy waste, and on the other hand, the stationary screw rod 10 can also make the subsequent gas flow out more effectively from between the blade channels.

[0028] Furthermore, the blade surface of the screw rod 10 is provided with several sets of rotary cutting elements 29, and the surface of the rotary cutting elements 29 is provided with several sets of barbed blocks 30. When the screw rod 10 rotates, the rotary cutting elements 29 and barbed blocks 30 that rotate synchronously can crush large pieces of coal slag in the slag and play a role in stirring and dissolving, which is more conducive to the efficient transportation of slag and prevents large pieces of coal slag from sticking together and causing transportation difficulties or blockages.

[0029] The separation mechanism includes a separation tank 15 fixedly connected to the upper surface of the mounting base plate 1. The separation tank 15 is connected to the discharge pipe 3 through the inlet pipe 16. A drain pipe 17 is fixedly connected to the bottom of one side of the separation tank 15. An electric valve 18 is installed on the drain pipe 17 so that the water collected inside the separation tank 15 can be discharged from the separation tank 15 through the drain pipe 17. An exhaust pipe 22 for gas discharge and collection is installed at the top of the separation tank 15.

[0030] Furthermore, an opening is provided on one side of the bottom of the separation tank 15, and a sealing plate 24 is slidably connected to the opening of the separation tank 15. The sealing plate 24 is misaligned with the opening of the separation tank 15 and can slide longitudinally. A servo motor 27 is provided on the separation tank 15 corresponding to the top of the sealing plate 24. A threaded rod 25 and a guide rod 26 are respectively provided on both sides of the sealing plate 24. The top end of the threaded rod 25 is connected to the output end of the servo motor 27. The threaded rod 25 is threadedly connected to the sealing plate 24, and the guide rod 26 is slidably connected to the sealing plate 24.

[0031] When it is necessary to recycle coal slag, the rotation of the servo motor 27 drives the threaded rod 25 to rotate synchronously, so that the sealing plate 24 can move upward against the side wall of the separator 15, which facilitates the subsequent collection of coal slag and the cleaning of the inside of the separator 15.

[0032] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0033] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0034] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An automatic drainage and slag removal device for downward drilling in coal mine gas extraction, characterized in that, Includes a sludge drainage mechanism, a separation mechanism, and a mounting base plate (1); The slag drainage mechanism includes a blower (11) fixed on the mounting base plate (1), an air outlet pipe (12) connected to the blower (11), a hollow plate (13) connected to the upper end of the air outlet pipe (12), a set of downwardly inclined connecting pipes (14) connected to the hollow plate (13), a vertical air inlet pipe (28) connected to the middle of the connecting pipe (14), and the lower end of the air inlet pipe (28) can be connected to the drill hole. The lower end of the connecting pipe (14) is sealed and connected to a slag drainage pipe (6), and the lower end of the slag drainage pipe (6) is connected to the drill hole. It can communicate with the borehole; the installation base plate (1) is provided with a discharge pipe (3) and is supported by multiple support plates (2) fixed on the installation base plate (1). A set of downwardly inclined gas extraction pipes (4) are connected to the discharge pipe (3). The lower end of the gas extraction pipe (4) is sealed, and the middle part of the gas extraction pipe (4) is connected to a vertical connecting pipe (5). The number and position of the connecting pipe (5) and the drainage slag pipe (6) correspond one-to-one, and the bottom end of the connecting pipe (5) is connected to the upper part of the drainage slag pipe (6). The separation mechanism includes a separation tank (15) fixed to the upper surface of the mounting base plate (1). The separation tank (15) is connected to the discharge pipe (3) through the inlet pipe (16). A drain pipe (17) is connected to the lower part of one side of the separation tank (15). An electric valve (18) is provided on the drain pipe (17). An exhaust pipe (22) for gas discharge and collection is provided at the top of the separation tank (15).

2. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 1, characterized in that, The drainage slag pipe (6) is equipped with a water level sensing control component and a water slag discharge component. The water level sensing control component can control the operation of the water slag discharge component according to the water level difference and transport and discharge the accumulated water and coal slag in the borehole.

3. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 2, characterized in that, The water level sensing control component includes a hollow tube (7) fixedly connected to the surface of the drainage slag pipe (6). The hollow tube (7) is vertically arranged, and a spherical float (8) is slidably connected inside the hollow tube (7). A control switch is provided at the top of the hollow tube (7), and the control switch can control the automatic operation of the water slag discharge component.

4. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 3, characterized in that, The water slag discharge assembly includes a drive motor (9) located at the top of the inside of the drainage slag pipe (6). A screw rod (10) is fixedly connected to the output end of the drive motor (9). The screw rod (10) is arranged along the axial direction of the drainage slag pipe (6) and extends to the bottom opening of the drainage slag pipe (6).

5. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 4, characterized in that, The blade surface of the spiral rod (10) is provided with multiple sets of rotary cutting parts (29), and the surface of the rotary cutting parts (29) is provided with multiple sets of barbs (30).

6. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 1, characterized in that, The lower side of the separation tank (15) is provided with an opening, and a sealing plate (24) is slidably connected to the opening of the separation tank (15). The sealing plate (24) can slide longitudinally to open or close the opening of the separation tank (15).

7. The automatic drainage and slag removal device for downward drilling in coal mine gas extraction as described in claim 6, characterized in that, A servo motor (27) is provided on the separation tank (15) corresponding to the top of the sealing plate (24). A threaded rod (25) and a guide rod (26) are respectively provided on both sides of the sealing plate (24). The top end of the threaded rod (25) is connected to the output end of the servo motor (27). The threaded rod (25) is threadedly connected to the sealing plate (24), and the guide rod (26) is slidably connected to the sealing plate (24).

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