Multi-layer collaborative gas extraction integrated device

Abstract

The invention discloses a multi-layer collaborative gas extraction integrated device which comprises an extraction pipe penetrating through multiple coal seams, the extraction pipe is provided with a sealing bag used for blocking a well way between a well drilling wall and the outer wall of the extraction pipe, an extraction well way is formed, the extraction pipe is provided with a suction mechanism used for extracting an extraction well way area, and the suction mechanism is used for sucking gas in the extraction well way area. A drill rod penetrates through the extraction pipe, and a drill bit located outside the lower end of the extraction pipe is arranged at the lower end of the drill rod.

Description

Technical Field

[0001] The present invention relates to the technical field of multi - seam gas drainage, and particularly to an integrated device for multi - layer collaborative gas drainage. Background Technique

[0002] During the process of coal mine gas drainage in multi - seams, the gas distribution is complex and the pressure difference between layers is significant. At present, conventional gas drainage devices mostly adopt a stratified independent drainage mode, which is difficult to achieve multi - layer collaborative control, and is prone to problems such as low drainage efficiency and uneven pressure distribution. Among them, the drainage pipe is difficult to dynamically adapt to the gas emission characteristics of different coal seams, which is likely to cause insufficient local drainage negative pressure or overload, leading to the risk of gas accumulation or drainage pipeline blockage. In addition, the existing drainage equipment lacks self - adaptive adjustment ability and relies on external power or complex control systems, resulting in high maintenance costs and insufficient reliability.

[0003] Therefore, it is necessary to provide an integrated device for multi - layer collaborative gas drainage to solve the problems raised in the above background technique. Summary of the Invention

[0004] To achieve the above object, the present invention provides the following technical solution: An integrated device for multi - layer collaborative gas drainage includes a drainage pipe penetrating through multi - seams. A sealing capsule for blocking the wellbore between the drilling wall and the outer wall of the drainage pipe is provided on the drainage pipe to form a drainage wellbore. A suction mechanism for draining the area of the drainage wellbore is provided on the drainage pipe. A drill rod penetrates through the drainage pipe, and a drill bit is provided at the lower end of the drill rod outside the lower end of the drainage pipe.

[0005] As a preferred technical solution of the present invention, the suction mechanism includes a casing connected to the drainage pipe. A through - hole two is provided on the casing. A radial retaining pipe is fixed on the through - hole two. A rotating ring rotates on the inner wall of the retaining pipe. Drainage fan blades are provided on the inner wall of the rotating ring. The inner end of the drainage fan blades is connected to a shaft pipe. A rotating rod penetrates through the shaft pipe. A sleeve block is sleeved on the outer wall of the drill rod. A ring groove with an opening facing the rotating rod is provided on the sleeve block, and one end of the rotating rod close to the drill rod contacts the upper wall of the ring groove.

[0006] As a preferred technical solution of the present invention, the rotating rod includes a column head installed on the inner wall of the shaft pipe. A slideway is provided on the column head. A slide rod is slidably connected to the slideway. A sealing plug contacting the inner wall of the shaft pipe is installed on the slide rod. The sealing plug is connected to the column head by a spring. A shaft rod is coaxially fixed on the sealing plug. A rotating wheel with an upper end contacting the upper wall of the ring groove is sleeved on the shaft rod.

[0007] As a preferred technical solution of the present invention, a filter disc is provided at the outer end of the retaining pipe, and the column head penetrates through the filter disc. A brush rod for cleaning the disc surface of the filter disc is provided at the outer end of the column head.

[0008] As a preferred technical solution of the present invention, a surrounding ring is rotatably installed at the opening of the annular groove, and a first through hole penetrated by the shaft rod is provided on the surrounding ring.

[0009] As a preferred technical solution of the present invention, conical surfaces symmetrically arranged on the upper and lower sides of the annular groove are provided on the sleeve block.

[0010] As a preferred technical solution of the present invention, drainage vane plates are provided on the upper conical surface.

[0011] As a preferred technical solution of the present invention, the sealing capsule includes a sleeve ring seat installed on the outer wall of the extraction pipe. A capsule ring is provided on the sleeve ring seat. A vertical column pipe is provided in the capsule ring. Through holes three are provided on the wall of the column pipe. The column pipe is connected with a gas guide pipe. The gas guide pipe is connected to the gas collecting box. The gas collecting box is connected with a pressurizing pipe.

[0012] Compared with the prior art, the present invention provides a multi-layer collaborative gas extraction integrated device, which has the following beneficial effects:

[0013] In the present invention, the driving of the sleeve block and the annular groove structure by the active rotation of the drill pipe drives the drainage fan blades of multiple suction mechanisms to rotate synchronously, realizing the collaborative control of the extraction well channels in different coal seams. The design of the rotating rod and the sealing plug of the suction mechanism can real-time sense the pressure change in the extraction pipe. Through the dynamic adjustment of the contact position between the rotating wheel and the annular groove, the rotation speed of the drainage fan blade is adaptively increased or decreased to ensure that the gas extraction pressure at each layer is evenly controllable, effectively avoiding the decline of extraction efficiency and potential safety hazards caused by local pressure imbalance.

[0014] In the present invention, through the combined design of the sealing plug and the spring, the device can automatically adjust the radial displacement of the rotating wheel according to the change of the extraction pressure, realize the intelligent control of the extraction rate by changing the transmission arc length, improve the adaptability to the fluctuation of gas emission, quickly relieve the abnormal increase of the extraction pressure, prevent pipeline blockage and gas overlimit, ensure the safety and stability of the extraction process, perform adaptive pressure balance and safety protection. The streamline design of the conical surface of the sleeve block and the drainage vane plate further optimizes the gas flow path, reduces the turbulent energy loss, and improves the overall extraction efficiency.

[0015] In the present invention, through the combined design of the filter disc and the brush rod, coal powder impurities can be effectively intercepted, the coal powder can be efficiently filtered, and pipeline blockage can be avoided. At the same time, the rotation of the drainage fan blade drives the brush rod to continuously clean the surface of the filter disc, perform self-cleaning, maintain the gas flow efficiency, reduce the frequency of manual maintenance, and reduce the operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the extraction integrated device of the present invention;

[0017] Figure 2 It is a schematic structural diagram of the suction mechanism of the present invention;

[0018] Figure 3 Schematic diagram of the second through-hole structure of the present invention;

[0019] Figure 4 Schematic diagram of the rotating rod structure of the present invention;

[0020] Figure 5 Schematic diagram of the sleeve block structure of the present invention;

[0021] Figure 6 Schematic diagram of the surrounding ring structure of the present invention;

[0022] Figure 7 Schematic diagram of the sealing capsule structure of the present invention;

[0023] In the figure: 1, extraction pipe; 2, suction mechanism; 3, drill pipe; 4, drill bit; 5, sealing capsule; 6, gas collection box; 7, pressure charging pipe; 21, sleeve block; 22, surrounding ring; 23, casing; 24, retaining pipe; 25, rotating rod; 211, annular groove; 212, conical surface; 213, drainage blade; 221, first through-hole; 231, second through-hole; 241, rotating ring; 242, drainage fan blade; 243, shaft pipe; 251, column head; 252, sliding rod; 253, sealing plug; 254, spring; 255, filter disc; 256, brush rod; 2511, slideway; 2531, shaft rod; 2532, runner; 51, sleeve ring seat; 52, capsule ring; 53, column pipe; 54, third through-hole; 55, air guide pipe. Specific embodiments

[0024] Referring to Figures 1-7 , the present invention provides a technical solution: a multi-layer collaborative gas extraction integrated device, including an extraction pipe 1 penetrating through multiple coal seams. A sealing capsule 5 for sealing the wellbore between the drilling wall and the outer wall of the extraction pipe 1 is provided on the extraction pipe 1 to form an extraction wellbore. A suction mechanism 2 for extracting the extraction wellbore area is provided on the extraction pipe 1. A drill pipe 4 penetrates through the extraction pipe 1, and a drill bit 4 is provided at the lower end of the drill pipe 4 outside the lower end of the extraction pipe 1.

[0025] In this embodiment, the suction mechanism 2 includes a casing 23 connected to the extraction pipe 1. A second through hole 231 is provided on the casing 23. A radial retaining pipe 24 is fixed on the second through hole 231. A rotating ring 241 rotates on the inner wall of the retaining pipe 24. Drainage fan blades 242 are provided on the inner wall of the rotating ring 241. The inner end of the drainage fan blade 242 is connected to a shaft pipe 243. A rotating rod 25 penetrates through the shaft pipe 24. A sleeve block 21 is sleeved on the outer wall of the drill rod 4. A ring groove 211 with an opening facing the rotating rod 25 is provided on the sleeve block 21, and one end of the rotating rod 25 close to the drill rod 4 contacts the upper wall of the ring groove 211. Among them, the sleeve block 21 is fixed on the outer wall of the drill rod 4. By adjusting the rotation of the drill rod 4, the rotation of the sleeve block 21 can be adjusted, so that the ring groove 211 rotates. The upper wall of the ring groove 211 drives the rotating rod 25 to rotate self - sufficiently. The rotating rod 25, the shaft pipe 24 and the rotating ring 241 rotate synchronously, driving the drainage fan blades 242 to rotate. When the drainage fan blades 242 rotate, the space in the extraction wellbore area is sucked. That is to say, through the active adjustment of the drill rod 4, the drainage fan blades 242 in multiple extraction wellbore areas can be actively adjusted, so as to actively adjust the collaborative extraction of gas in multiple extraction wellbores, so that the gas in multiple extraction wellbores can be continuously sucked and drained under a uniformly adjustable extraction pressure, enabling the multi - layer extraction wellbores to stably, smoothly and safely carry out collaborative gas extraction.

[0026] In this embodiment, the rotating rod 25 includes a stud 251 installed on the inner wall of the mounting shaft tube 24. A slideway 2511 is provided on the stud 251. A slide rod 252 is slidably connected to the slideway 2511. A sealing plug 253 in contact with the inner wall of the shaft tube 24 is installed on the slide rod 252. The sealing plug 253 is connected to the stud 251 by a spring 254. A shaft rod 2531 is coaxially fixed on the sealing plug 253. A runner 2532 whose upper end is in contact with the upper wall of the annular groove 211 is sleeved on the shaft rod 2531. That is to say, the stud 251 is fixed to the shaft tube 24. When the sleeve block 21 is driven to rotate by the drill rod 4, the annular groove 211 can rotate, and the annular groove 211 can drive the runner 2532 to rotate self - adaptively. The runner 2532 drives the shaft rod 2531, the sealing plug 253 and the stud 251 to rotate. It should be noted that through the connection design of the contact between the sealing plug 253 and the inner wall of the shaft tube 24, when the extraction pressure in the extraction pipe 1 changes, it can act on the sealing plug 253 to move along the inner wall of the shaft tube 24. At this time, the sealing plug 253 can drive the shaft rod 2531 to displace, thereby changing the contact position between the runner 2532 and the annular groove 211. When the extraction pressure in the extraction pipe 1 where the sealing plug 253 is located increases, the runner 2532 moves radially outward along the annular groove 211. At this time, under the condition of the same unit rotation angle of the annular groove 211, the arc length of the annular groove 211 acting on the runner 2532 is increased, so that the rotation speed of the runner 2532 is increased, thereby increasing the extraction rate, accelerating the gas flow rate, relieving the extraction pressure, making the multi - layer gas extraction more safe and stable, and thus increasing the rotation speed of the drainage fan blade 242 in this area. That is to say, it can realize the dynamic capture of the dynamic change of the extraction pressure adaptively, and can timely and flexibly adjust the extraction rate adaptively to the change of the extraction pressure.

[0027] In this embodiment, a filter disc 255 is provided at the outer end of the retaining tube 24, and the stud 251 penetrates through the filter disc 255. A brush rod 256 for cleaning the surface of the filter disc 255 is provided at the outer end of the stud 251. The filter disc 255 filters the coal powder in the gas in the extraction wellbore area, improving the smoothness of the gas flow in the extraction pipe 1. At the same time, the surface of the filter disc 255 is timely swept by the brush rod 256, thereby maintaining the permeability of the filter disc 255.

[0028] In this embodiment, a surrounding ring 22 is rotatably installed at the opening of the annular groove 211. A through - hole 221 through which the shaft rod 2531 passes is provided on the surrounding ring 22, so as to maintain the cleanliness of the annular groove 211 and enable safe and precise transmission between the annular groove 211 and the runner 2532.

[0029] In this embodiment, conical surfaces 212 symmetrically arranged on the upper and lower sides of the annular groove 211 are provided on the sleeve block 21, so as to make the gas flow in the extraction pipe 1 more smooth.

[0030] In this embodiment, a drainage vane 213 is provided on the conical surface 212 described above, so that after the gas drained by the drainage fan blade 242 impacts the sleeve block 21, it can be timely and fully drained upward by the drainage vane 213, avoiding the formation of chaotic air flow and improving the smoothness of air flow.

[0031] In this embodiment, the sealing capsule 5 includes a collar seat 51 installed on the outer wall of the extraction pipe 1. A capsule ring 252 is provided on the collar seat 51. A vertical column pipe 53 is provided in the capsule ring 252. A through hole three 54 is provided on the wall of the column pipe 53. The column pipe 53 is connected to a gas guide pipe 55. The gas guide pipe 55 is connected to the gas collecting box 6. The gas collecting box 6 is connected to a pressurizing pipe 7. That is to say, the gas collecting box 6 is pressurized through the pressurizing pipe 7. The gas collecting box 6 pressurizes all the gas guide pipes 55. The gas guide pipe 55 is communicated with the column pipe 53. The capsule ring 252 is pressurized through the through hole three 54, so that the capsule ring 252 seals the wellbore between the drilling wall and the outer wall of the extraction pipe 1 to form an extraction wellbore.

[0032] In specific implementation, it includes the following steps:

[0033] S1: According to the positions of each coal seam of the multi-layer gas to be extracted, and according to the extraction rates of each coal seam, the shaft 2531 in the suction mechanism 2 is replaced, the shaft 2531 of different lengths is replaced, and the initial contact position between the runner 2532 and the ring groove 211 is adjusted to prepare the initial suction mechanism 2 corresponding to the coal seam.

[0034] S2: The extraction pipe 1 and the drill pipe 3 are introduced into the drilling, so that the sealing capsule 5 seals the drilling corresponding to the coal seam, and is pressurized through the pressurizing pipe 7 to form an extraction wellbore.

[0035] S3: By controlling the rotation of the drill pipe 3, the multi-layer gas is extracted from the multi-layer extraction wellbore through the extraction pipe 1 in a coordinated manner.

[0036] The above is only a preferred specific implementation manner of the invention, but the protection scope of the invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the invention, according to the technical solution of the invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the invention.

Claims

1. An integrated device for multi-layer collaborative gas drainage, comprising a drainage pipe (1) penetrating multiple coal seams, characterized in that, The extraction pipe (1) is provided with a sealing bag (5) for sealing the wellbore between the wellbore wall and the outer wall of the extraction pipe (1) to form an extraction wellbore. The extraction pipe (1) is provided with a suction mechanism (2) for extracting the extraction wellbore area. A drill rod (4) runs through the extraction pipe (1). The lower end of the drill rod (4) is provided with a drill bit (4) located outside the lower end of the extraction pipe (1).

2. The integrated device for multi-layer collaborative gas drainage according to claim 1, wherein, The suction mechanism (2) comprises a sleeve (23) connected to the extraction pipe (1), the sleeve (23) being provided with a second through hole (231), a radial retaining tube (24) being fixed on the second through hole (231), a rotating ring (241) being rotatably provided on the inner wall of the retaining tube (24), a drainage blade (242) being provided on the inner wall of the rotating ring (241), an inner end of the drainage blade (242) being connected with an axial tube (243), a rotating rod (25) passing through the axial tube (24), a sleeve block (21) being sleeved on the outer wall of the drill rod (4), an annular groove (211) being provided on the sleeve block (21) with an opening facing the rotating rod (25), and one end of the rotating rod (25) being close to the drill rod (4) contacts the upper wall of the annular groove (211).

3. The integrated device for multi-layer collaborative gas drainage according to claim 2, characterized in that, The rotating rod (25) comprises a column head (251) mounted on the inner wall of the shaft tube (24); a slideway (2511) is provided on the column head (251); a sliding rod (252) is slidably connected to the slideway (2511); a sealing plug (253) in contact with the inner wall of the shaft tube (24) is mounted on the sliding rod (252); the sealing plug (253) is connected to the column head (251) via a spring (254); a shaft rod (2531) is coaxially fixed to the sealing plug (253); and a rotating wheel (2532) is sleeved on the shaft rod (2531) whose upper end is in contact with the upper wall of the annular groove (211).

4. The integrated device for multi-layer collaborative gas drainage according to claim 3, wherein, The outer end of the retaining tube (24) is provided with a filter disc (255), and the column head (251) penetrates the filter disc (255). The outer end of the column head (251) is provided with a brush rod (256) for cleaning the surface of the filter disc (255).

5. The integrated device for multi-layer collaborative gas drainage according to claim 3, characterized in that, A surrounding ring (22) is rotatably mounted on the opening of the annular groove (211), and a through hole (221) penetrated by a shaft (2531) is provided on the surrounding ring (22).

6. The integrated device for multi-layer collaborative gas drainage according to claim 2, characterized in that, The sleeve block (21) is provided with conical surfaces (212) symmetrically arranged on the upper and lower sides of the annular groove (211).

7. The integrated device for multi-layer collaborative gas drainage according to claim 6, characterized in that, A flow guide blade (213) is provided on the upper conical surface (212).

8. The integrated device for multi-layer collaborative gas drainage according to claim 1, wherein, The sealing bag (5) comprises a collar seat (51) mounted on the outer wall of the extraction tube (1), a bag ring (252) being provided on the collar seat (51), a vertical column tube (53) being provided in the bag ring (252), a through hole three (54) being provided on the wall of the column tube (53), the column tube (53) being connected to an air guide tube (55), the air guide tube (55) being connected to an air collecting box (6), and the air collecting box (6) being connected to a pressure charging tube (7).

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