Coal bed gas drainage and mining device

Abstract

The utility model relates to the technical field of coal bed gas drainage and mining, in particular to a coal bed gas drainage and mining device which comprises an outer rotating cover, chip prevention nets are arranged on the four sides of the side face of the outer rotating cover, flow guide air channels are fixedly connected to the four corners of the side face of the outer rotating cover, and an air suction center pipe is fixedly connected to the center of the interior of the outer rotating cover. A limiting shaft frame is arranged between the interior of the outer rotating cover and the exterior of the air suction center pipe, a motor frame is arranged at the bottom end of the limiting shaft frame, and a driving motor is arranged in the motor frame. Through the arrangement of the outer rotating cover, the chip prevention net, the air suction central pipe, the limiting shaft bracket, the motor frame, the driving motor, the sealing shaft ring, the mounting shaft seat, the air control valve seat and the connecting valve port, the equipment can perform efficient and continuous coal bed gas drainage and mining operation; a worker firstly connects the whole outer rotating cover with a coalbed methane drainage and mining pump machine pipeline assembly through a mounting shaft seat at the top end of a limiting shaft bracket, a gas control valve seat and a connecting valve port.

Description

Technical Field

[0001] The utility model relates to the technical field of coalbed methane drainage, in particular to a coalbed methane drainage device. Background Technique

[0002] Coalbed methane, also known as coalbed gas, is a mixed gas composed of methane, carbon dioxide, nitrogen, etc. escaping from coal and surrounding rocks. Gas is a harmful factor in coal mine production. It not only pollutes the air, but also when the gas content in the air reaches a certain concentration, it will cause an explosion when encountering fire, resulting in accidents, and needs to be drained in advance.

[0003] For example, the patent document with the publication number of CN 208040318 U discloses an anti-coal powder device for coalbed methane drainage, which includes an upper joint, a centralizer, an outer pipe, a wire-wound screen pipe, a coal powder blocking joint, an inner pipe and a lower joint. The upper joint, the outer pipe and the lower joint are sequentially welded and connected and are internally through. A centralizer is welded inside the connection between the upper joint and the outer pipe. A wire-wound screen pipe is welded at the lower end of the centralizer. The lower end of the wire-wound screen pipe is movably connected through a threaded fit with a coal powder blocking joint. The lower end of the coal powder blocking joint is movably connected through a threaded fit with an inner pipe. The lower end of the inner pipe is communicated with the lower joint. The utility model has a simple structure, is convenient to install and works reliably, effectively prevents the coal powder in the liquid in the production string from sliding down to the pump, and avoids the occurrence of downhole accidents such as pump wear, jamming or blocking.

[0004] However, when the structure is actually used for coalbed methane drainage, it cannot quickly block and protect the flying debris and coal powder at the drainage head. When actually draining coalbed methane, the drainage head needs to be retracted and cleaned every once in a while, which seriously affects the efficiency of the equipment for draining coalbed methane. At the same time, the equipment cannot quickly divert and discharge the fine coal powder, and cannot meet the daily use requirements. Therefore, it is urgent to design a coalbed methane drainage device to solve the above problems. Summary of the Invention

[0005] The purpose of the utility model is to provide a coalbed methane drainage device to solve the problems in the above background technique that when the existing structure is actually used for coalbed methane drainage, it cannot quickly block and protect the flying debris and coal powder at the drainage head. When actually draining coalbed methane, the drainage head needs to be retracted and cleaned every once in a while, which seriously affects the efficiency of the equipment for draining coalbed methane. At the same time, the equipment cannot quickly divert and discharge the fine coal powder, and cannot meet the daily use requirements.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: A coalbed methane drainage device includes an outer rotating cover. Anti-chip nets are arranged on the four sides of the side surface of the outer rotating cover. Flow guiding air ducts are fixedly connected to the four corners of the side surface of the outer rotating cover. An air suction central pipe is fixedly connected to the center inside the outer rotating cover.

[0007] A limiting shaft bracket is provided between the interior of the outer rotating cover and the exterior of the air suction central pipe. A motor bracket is provided at the bottom end of the limiting shaft bracket. A driving motor is provided inside the motor bracket. A sealing shaft collar is provided at one end of the motor bracket.

[0008] Preferably, the bottom end of the motor bracket is fixedly connected to an air suction fan bracket, and an air suction ring grille is provided on the surface of the air suction fan bracket.

[0009] Preferably, an overhead base is provided at the bottom end of the air suction fan bracket.

[0010] Preferably, a mounting shaft seat is provided at the top end of the limiting shaft bracket, and a gas control valve seat is fixedly connected to the surface of the mounting shaft seat.

[0011] Preferably, a connecting valve port is provided at one end of the gas control valve seat, and the connecting valve port communicates with the air suction central pipe.

[0012] Preferably, a powder separation tube core is sleeved on the outer surface of the air suction central pipe, and a powder suction grille is provided on the inner wall of the diversion air duct.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] For this coalbed methane drainage device, by providing the outer rotating cover, anti-chip net, air suction central pipe, limiting shaft bracket, motor bracket, driving motor, sealing shaft collar, mounting shaft seat, gas control valve seat, connecting valve port and powder separation tube core, the device can perform efficient and continuous coalbed methane drainage operations. During the actual use process, the staff first connects the entire outer rotating cover to the coalbed methane drainage pump pipeline assembly through the mounting shaft seat, gas control valve seat and connecting valve port at the top end of the limiting shaft bracket, and then inserts the entire outer rotating cover into the prepared coalbed methane drainage coal seam. The overhead base at the bottom end of the air suction fan bracket is used for fitting and limiting with the coal seam. At this time, the gas control valve seat is started for coalbed methane drainage operations, and at the same time, the driving motor inside the motor bracket is started to drive the outer rotating cover and the internal air suction central pipe to rotate at high speed around the limiting shaft bracket. During the rotation process, the anti-chip net on the side of the outer rotating cover can perform centrifugal blocking of the gravel and debris in the coalbed methane, and the powder separation tube core sleeved on the outer surface of the air suction central pipe can perform centrifugal blocking of the dust in the coalbed methane, always ensuring pure coalbed methane drainage work, reflecting the practicality of the device design.

[0015] This coalbed methane drainage device further improves the overall use effect of the equipment through the externally rotating cover, anti-chip net, diversion air duct, suction central pipe, limit shaft frame, motor frame, drive motor, suction fan frame, suction air ring grille, powder separation pipe core and powder suction grille. During daily use, when the powder separation pipe core sleeved on the outer surface of the suction central pipe centrifugally throws out dust, the fan assembly inside the suction fan frame can be synchronously started by the drive motor inside the motor frame. Then, negative pressure powder suction operation is carried out at the powder suction grille on the inner wall of the diversion air duct at the four corner positions of the inner wall of the externally rotating cover, so as to quickly suck out the pulverized coal thrown out at the suction central pipe and efficiently discharge it downward from the suction air ring grille of the suction fan frame, avoiding affecting the coalbed methane drainage, which reflects the comprehensiveness of the equipment design. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional schematic diagram of the structure of the present invention;

[0017] Figure 2 is an overall schematic diagram of the structure of the externally rotating cover of the present invention;

[0018] Figure 3 is an overall schematic diagram of the structure of the motor frame of the present invention;

[0019] Figure 4 For the present invention Figure 2 is an enlarged schematic diagram of the structure at A in.

[0020] In the figure: 1. Externally rotating cover; 2. Anti-chip net; 3. Diversion air duct; 4. Suction central pipe; 5. Limit shaft frame; 6. Motor frame; 7. Drive motor; 8. Sealing shaft ring; 9. Suction fan frame; 10. Suction air ring grille; 11. Overhead base; 12. Installation shaft seat; 13. Air control valve seat; 14. Connection valve port; 15. Powder separation pipe core; 16. Powder suction grille. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , an embodiment provided by the present invention:

[0023] A coalbed methane drainage device includes an outer rotating cover 1. Anti-chip nets 2 are arranged on the four sides of the side surface of the outer rotating cover 1. Flow guide air ducts 3 are fixedly connected to the four corners of the side surface of the outer rotating cover 1. A suction central pipe 4 is fixedly connected to the center inside the outer rotating cover 1. An installation shaft seat 12 is arranged at the top of the limit shaft frame 5. A gas control valve seat 13 is fixedly connected to the surface of the installation shaft seat 12. A connecting valve port 14 is arranged at one end of the gas control valve seat 13. The connecting valve port 14 is communicated with the suction central pipe 4. A powder separation pipe core 15 is sleeved on the outer surface of the suction central pipe 4. Powder suction grilles 16 are arranged on the inner wall of the flow guide air duct 3. When the powder separation pipe core 15 sleeved on the outer surface of the suction central pipe 4 centrifugally throws out dust, the fan assembly inside the fan frame 9 can be synchronously started by the driving motor 7 inside the motor frame 6. Then, negative pressure powder suction operation is carried out at the four corners of the inner wall of the outer rotating cover 1 through the powder suction grilles 16 on the inner wall of the flow guide air duct 3, so as to quickly suck out the pulverized coal thrown out at the suction central pipe 4.

[0024] A limit shaft frame 5 is arranged between the inside of the outer rotating cover 1 and the outside of the suction central pipe 4. The bottom end of the limit shaft frame 5 is provided with a motor frame 6. A driving motor 7 is arranged inside the motor frame 6. A sealing shaft ring 8 is arranged at one end of the motor frame 6. The bottom end of the motor frame 6 is fixedly connected to a fan frame 9. A suction air ring grille 10 is arranged on the surface of the fan frame 9. The bottom end of the fan frame 9 is provided with an overhead base 11. Starting the driving motor 7 inside the motor frame 6 drives the outer rotating cover 1 and the inner suction central pipe 4 to perform high-speed rotation operation around the limit shaft frame 5. During the rotation process, the anti-chip net 2 on the side surface of the outer rotating cover 1 can centrifugally block the gravel waste in the coalbed methane, and the powder separation pipe core 15 sleeved on the outer surface of the suction central pipe 4 can centrifugally block the dust in the coalbed methane.

[0025] Working principle: When in use, the user first connects the entire outer rotating cover 1 to the coalbed methane drainage pump pipeline assembly through the mounting shaft seat 12, air control valve seat 13, and connecting valve port 14 at the top of the limit shaft frame 5. Then, the entire outer rotating cover 1 is inserted into the prepared coalbed methane drainage coal seam, and the overhead base 11 at the bottom of the suction fan frame 9 is used to fit and limit with the coal seam. At this time, the air control valve seat 13 is started for coalbed methane drainage operation, and at the same time, the driving motor 7 inside the motor frame 6 is started to drive the outer rotating cover 1 and the internal suction central pipe 4 to rotate at high speed around the limit shaft frame 5. During the rotation process, the anti-chip net 2 on the side of the outer rotating cover 1 can perform centrifugal blocking of the crushed stone waste in the coalbed methane, and the powder separation pipe core 15 sleeved on the outer surface of the suction central pipe 4 can perform centrifugal blocking of the dust in the coalbed methane, always ensuring the pure drainage of coalbed methane. In the daily use process, when the powder separation pipe core 15 sleeved on the outer surface of the suction central pipe 4 centrifugally throws out the dust, the fan assembly inside the suction fan frame 9 can be synchronously started by the driving motor 7 inside the motor frame 6. Then, negative pressure powder suction operation is carried out through the powder suction grille 16 on the inner wall of the diversion air duct 3 at the four corner positions of the inner wall of the outer rotating cover 1, so as to quickly suck out the pulverized coal thrown out at the suction central pipe 4 and efficiently discharge it downward from the air suction ring grille 10 of the suction fan frame 9, avoiding affecting the coalbed methane drainage. The above is the entire working principle of the present invention.

[0026] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A coalbed methane extraction device, comprising an outer rotating cover (1), characterized in that: The four sides of the outer rotating cover (1) are provided with anti-chip nets (2), the four corners of the side of the outer rotating cover (1) are fixedly connected with air guide ducts (3), and the inner center of the outer rotating cover (1) is fixedly connected with an air suction center pipe (4); A limiting shaft frame (5) is arranged between the interior of the outer rotating cover (1) and the exterior of the suction center pipe (4), a motor frame (6) is arranged at the bottom end of the limiting shaft frame (5), a driving motor (7) is arranged inside the motor frame (6), and a sealing shaft ring (8) is arranged at one end of the motor frame (6).

2. A coalbed methane extraction device according to claim 1, characterized in that: The bottom end of the motor frame (6) is fixedly connected to a suction frame (9), and a suction ring grille (10) is provided on the surface of the suction frame (9).

3. A coalbed methane extraction device according to claim 2, characterized in that: An overhead base (11) is provided at the bottom end of the suction machine frame (9).

4. A coalbed methane extraction device according to claim 1, characterized in that: A mounting shaft seat (12) is provided at the top end of the position-limiting shaft frame (5), and a gas control valve seat (13) is fixedly connected to the surface of the mounting shaft seat (12).

5. A coalbed methane extraction device according to claim 4, characterized in that: One end of the air control valve seat (13) is provided with a connecting valve port (14), and the connecting valve port (14) is connected to the air suction center pipe (4).

6. A coalbed methane extraction device according to claim 1, characterized in that: The outer surface of the central air suction tube (4) is sleeved with a powder isolation tube core (15), and the inner wall of the guide air duct (3) is provided with a powder suction grille (16).

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