Self-adaptive regulation and control system for gas extraction

Abstract

The utility model discloses a gas extraction self-adaptive regulation and control system, which belongs to the technical field of gas extraction and comprises an extraction pump station and a pipeline system. The pipeline system comprises an extraction main pipe, extraction branch pipes, extraction connecting pipes and extraction pipes, the extraction pipes are located in coal seam drill holes, the ends, away from a coal seam, of the extraction pipes are connected with the extraction branch pipes through the extraction connecting pipes, one ends of the extraction branch pipes are blocked, the other ends of the extraction branch pipes are connected with the extraction main pipe, and the extraction main pipe is connected with the extraction pump station; an electric control valve, a comprehensive measuring instrument and a variable-frequency extraction pump are sequentially arranged in the direction, away from the extraction pipe, of the extraction connecting pipe, and the comprehensive measuring instrument comprises a concentration sensor, a pressure sensor and a flow sensor which are used for measuring the concentration, the pressure and the volume flow of gas in the extraction connecting pipe respectively. According to the utility model, extraction parameters can be monitored, so that the extraction negative pressure is matched with the parameters, the extraction period of high-concentration gas can be effectively prolonged, and the gas extraction safety and the utilization efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas extraction, and in particular to a gas extraction adaptive control system. Background Art

[0002] Coal seam drilling gas extraction has been widely adopted as a primary technical measure for regional gas disaster management and resource utilization in high-gas and coal-gas outburst seams. Gas extraction utilizes a gas extraction pipeline system to extract gas from underground coal seams to the surface through a network of pipes. This system consists of a pumping station, a pipeline system, and other ancillary equipment. Existing gas pipeline network extraction systems suffer from a mismatch between the extraction negative pressure and extraction parameters. Currently, underground gas extraction systems rely primarily on manual control of gas concentration, a labor-intensive and time-consuming process that results in poor overall extraction efficiency and effectiveness. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a gas extraction adaptive control system, which can monitor the extraction parameters, match the extraction negative pressure with the parameters, and improve the gas extraction concentration and extraction efficiency.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a gas extraction adaptive control system, including an extraction pump station and a pipeline system;

[0005] The pipeline system includes an extraction main pipe, an extraction branch pipe, an extraction connecting pipe, and an extraction pipe. Each of the extraction pipes is located in a coal seam borehole. One end of each extraction pipe away from the coal seam is connected to the extraction branch pipe through an extraction connecting pipe. One end of the extraction branch pipe is blocked, and the other end is connected to the extraction main pipe. The extraction main pipe is connected to the extraction pump station.

[0006] The extraction connecting pipe is provided with an electric control valve, a comprehensive measuring instrument, and a variable frequency extraction pump in sequence in the direction away from the extraction pipe. The comprehensive measuring instrument includes a concentration sensor, a pressure sensor and a flow sensor, which are used to measure the concentration, gas pressure and volume flow of the gas in the extraction connecting pipe respectively.

[0007] Furthermore, the electric valve includes a valve body, a valve cover, a valve core, a valve stem and a driving mechanism, wherein the valve core is located in the valve body, one end of the valve stem penetrates the valve body and is connected to the valve core, and the other end of the valve stem is connected to the output end of the driving mechanism, the driving mechanism is provided on the valve cover, and the valve cover is mounted on the valve body in a coordinated manner;

[0008] A valve port is formed in the valve body, and the valve core is used to close the valve port; the valve core includes an integrally formed main valve core and a secondary valve core, the upper edge of the valve port is provided with a sealing cone port, and the outer peripheral surface of the main valve core is formed with a conical surface that matches the sealing cone port; the secondary valve core includes at least two valve plates, the valve plates are fixed to the bottom surface of the valve core, one end of each of the valve plates is connected and fixed, and an arc-shaped valve sheet is fixed at one end of each of the valve plates away from each other, and the arc-shaped valve sheet is in contact with the inner peripheral surface of the valve port.

[0009] Furthermore, the width of the arc-shaped valve plate decreases in a direction away from the valve stem.

[0010] Furthermore, a packing cavity is formed between the valve cover and the valve stem, and a sealing packing is arranged in the packing cavity. The sealing packing includes an inner ring, an outer ring and a first sealing ring. The outer ring is coaxial with the inner ring and is located outside the inner ring. The first sealing ring is filled between the inner ring and the outer ring. The cross-section of the first sealing ring is in the shape of a waist drum. A pressure cover is connected to the valve cover, and the pressure cover is tightly pressed against the top wall of the sealing packing.

[0011] Furthermore, an air intake pipe portion is formed on the valve body, and the outer peripheral surface diameter of the air intake pipe portion decreases in the direction away from the valve body. The outer side of the air intake pipe portion is threadedly connected to a locking sleeve, and the inner hole of the locking sleeve is a tapered hole and is adapted to the outer wall of the air intake pipe portion.

[0012] Furthermore, an annular groove is provided on the inner wall of the air intake pipe portion, a second sealing ring is provided in the annular groove, a retaining ring is integrally formed on the end of the locking sleeve away from the air intake pipe portion, and when the locking sleeve is threadedly installed on the air intake pipe portion, the retaining ring abuts against the end face of the air intake pipe portion, and a sealing felt is fixed to the retaining ring near the end face of the air intake pipe portion.

[0013] Beneficial effects of the utility model:

[0014] The utility model detects the gas concentration, flow rate, etc. of the pipeline through a comprehensive measuring instrument and feeds back to the control unit, determines the optimal opening of the electric control valve on the extraction connecting pipe and the optimal rotation speed of the variable frequency extraction pump, and can adjust the opening of the corresponding electric control valve and the rotation speed of the variable frequency extraction pump when the gas concentration in the pipeline is too low or too high, so that the gas concentration matches the negative pressure, which can effectively extend the high-concentration gas extraction period and improve the safety and utilization efficiency of gas extraction; the use of a new type of electric control valve can facilitate the accurate regulation of the valve opening, effectively coordinate the control of the gas extraction volume and extraction concentration, and is easy to connect, has good sealing performance, is convenient to disassemble and assemble, and has strong maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2It is a structural diagram of the electric control valve in the utility model.

[0017] Figure 3 It is a structural diagram of the valve core in the utility model.

[0018] Figure 4 yes Figure 2 A partial enlarged view of area A in the middle.

[0019] In the figure: 1. Extraction pump station; 2. Pipeline system; 21. Extraction main pipe; 22. Extraction branch pipe; 23. Extraction connecting pipe; 231. Comprehensive measuring instrument; 232. Frequency conversion extraction pump; 24. Extraction pipe; 3. Electric control valve; 31. Valve body; 311. Valve port; 312. Sealing cone port; 32. Valve cover; 321. Pressure cover; 322. Sealing packing; 323. Inner ring; 324. Outer ring; 325. First sealing ring; 326. Sealing ring; 33. Valve core; 331. Main valve core; 332. Conical surface; 333. Auxiliary valve core; 334. Valve plate; 335. Arc-shaped valve disc; 34. Valve stem; 35. Driving mechanism; 36. Inlet pipe; 361. Locking sleeve; 362. Second sealing ring; 363. Sealing felt; 364. Retaining ring. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0021] The utility model discloses a gas extraction self-adaptive control system.

[0022] Reference Figure 1 A gas extraction adaptive control system includes an extraction pump station 1, a pipeline system 2, and a control unit; wherein the pipeline system 2 includes an extraction main pipe 21, an extraction branch pipe 22, an extraction connecting pipe 23, and an extraction pipe 24. Each extraction pipe 24 is located in a coal seam borehole. An end of each extraction pipe 24 away from the coal seam is connected to the extraction branch pipe 22 through the extraction connecting pipe 23. One end of the extraction branch pipe 22 is blocked, and the other end is connected to the extraction main pipe 21. The extraction main pipe 21 is connected to the extraction pump station 1.

[0023] Reference Figure 1The extraction connection pipe 23 is equipped with a comprehensive measuring instrument 231, an electrically controlled valve 3, and a variable frequency extraction pump 232, located in the direction away from the extraction pipe 24. The electrically controlled valve 3 controls the opening of the extraction connection pipe 23. The comprehensive measuring instrument 231 includes a concentration sensor, a pressure sensor, and a flow sensor, respectively used to measure the gas concentration, gas pressure, and volume flow rate within the extraction connection pipe 23. A single-chip microcomputer is used as the control unit. The control unit is electrically connected to the electrically controlled valve 3 and the comprehensive measuring instrument 231, and is used to receive data detected and fed back by the comprehensive measuring instrument 231, thereby adjusting the speed of the variable frequency extraction pump 232 and the opening of the electrically controlled valve 3.

[0024] The gas concentration, flow rate, etc. in the pipeline are detected by the comprehensive measuring instrument 231 and fed back to the control unit to determine the optimal opening of the electric control valve 3 on the extraction connecting pipe 23 and the optimal speed of the variable frequency extraction pump 232. If the gas concentration in the pipeline is too low or too high, the opening of the corresponding electric control valve 3 and the speed of the variable frequency extraction pump 232 can be adjusted to match the gas concentration with the negative pressure, which can effectively extend the high-concentration gas extraction period and improve the safety and utilization efficiency of gas extraction.

[0025] Reference Figure 2 The electric valve includes a valve body 31, a valve cover 32, a valve core 33, a valve stem 34, and a drive mechanism 35. The valve core 33 is located within the valve body 31. One end of the valve stem 34, which penetrates the valve body 31, is connected to the valve core 33. The other end of the valve stem 34 is connected to the output end of the drive mechanism 35. The drive mechanism 35 is provided on the valve cover 32 and is used to drive the valve core 33 to move within the valve body 31 to control the opening of the electric valve. The drive mechanism 35 adopts the common drive mechanism 35 of existing electric control valves 3, such as the drive mechanism 35 shown in Publication No. CN117646804B. It will not be described in detail in this embodiment. The valve cover 32 is mounted to the valve body 31 by bolts.

[0026] Reference Figure 2 and Figure 3 A valve port 311 is formed in the valve body 31, and the valve core 33 is used to close the valve port 311; the valve core 33 includes an integrally formed main valve core 331 and a secondary valve core 333, the upper edge of the valve port 311 is provided with a sealing cone port 312, and the outer peripheral surface of the main valve core 331 is formed with a conical surface 332 that matches the sealing cone port 312; the secondary valve core 333 includes at least two valve plates 334; in this embodiment, four valve plates 334 are provided, which are fixed to the bottom surface of the valve core 33, and one end of each valve plate 334 is connected and fixed, and an arc-shaped valve disc 335 is fixed at the end of each valve plate 334 away from each other, and the arc-shaped valve disc 335 is in contact with the inner peripheral surface of the valve port 311, and the width of the arc-shaped valve disc 335 decreases in the direction away from the valve stem 34.

[0027] When the conical surface 332 of the main valve core 331 fits against the inner wall of the sealing conical opening 312 of the valve port 311, the valve can be closed, and the structural arrangement of the conical surface 332 and the sealing conical opening 312 can improve the sealing effect; when the conical surface 332 of the main valve core 331 is separated from the sealing conical opening 312, the valve is in an open state, and gas flows through the gap of the arc-shaped valve plate 335. As the distance between the main valve core 331 and the valve port 311 continues to increase, the spacing area between adjacent arc-shaped valve plates 335 also continues to increase, that is, the opening of the valve also continues to increase to meet the opening control requirements of the gas pipeline; in addition, the arc-shaped valve plate 335 fits against the inner wall of the valve port 311, which also guides the movement of the valve core 33 and controls the flow position in the gas valve body 31.

[0028] Reference Figures 2 to 4 A packing cavity is formed between the valve cover 32 and the valve stem 34. A sealing packing 322 is disposed within the packing cavity. The sealing packing 322 comprises an inner ring 323, an outer ring 324, and a first sealing ring 325. The outer ring 324 is coaxial with and located outside the inner ring 323. The first sealing ring 325 is positioned between the inner and outer rings 323 and 324. The cross-section of the first sealing ring 325 is drum-shaped. The first sealing ring 325 is pre-compressed perpendicular to the axis of the valve stem 34. Seal rings 326 are provided on the upper and lower sides of the first sealing ring 325. A gland 321 is connected to the valve cover 32, which abuts against the top wall of the sealing packing 322. The sealing ring 326 is made of polytetrafluoroethylene, while the inner and outer rings 323 and 324 are made of aramid fiber packing, which offers excellent wear resistance. When the valve stem 34 moves frequently and the valve and valve stem 34 are disassembled and assembled, causing the contact surface between the sealing packing 322 and the valve stem 34 to wear, the waist drum-shaped sealing ring 326 will elastically stretch and press against the inner ring 323 and the outer ring 324, so that the inner ring 323 can be in close contact with the valve stem 34, achieving automatic compensation and ensuring the sealing effect.

[0029] Reference Figure 2 The valve body 31 is formed with an air inlet pipe portion 36. The outer diameter of the air inlet pipe portion 36 decreases as it moves away from the valve body 31. A locking sleeve 361 is threadedly connected to the outer side of the air inlet pipe portion 36. The inner hole of the locking sleeve 361 is tapered and fits the outer wall of the air inlet pipe portion 36. An annular groove is formed on the inner wall of the air inlet pipe portion 36, and a second sealing ring 362 is installed in the annular groove. A retaining ring 364 is integrally formed on the end of the locking sleeve 361 away from the air inlet pipe portion 36. When the locking sleeve 361 is threadedly mounted on the air inlet pipe portion 36, the retaining ring 364 abuts the end surface of the air inlet pipe portion 36. A sealing felt 363 is fixed to the retaining ring 364 near the end surface of the air inlet pipe portion 36.

[0030] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A gas drainage adaptive control system, characterized by: It includes an extraction pump station (1) and a pipeline system (2); The pipeline system (2) includes an extraction main pipe (21), an extraction branch pipe (22), an extraction connecting pipe (23) and an extraction pipe (24), each of the extraction pipes (24) is located in a coal seam borehole, and one end of each extraction pipe (24) away from the coal seam is connected to the extraction branch pipe (22) through the extraction connecting pipe (23), one end of the extraction branch pipe (22) is blocked, and the other end is connected to the extraction main pipe (21), and the extraction main pipe (21) is connected to the extraction pump station (1); The extraction connecting pipe (23) is provided with an electric control valve (3), a comprehensive measuring instrument (231), and a variable frequency extraction pump (232) in sequence in a direction away from the extraction pipe (24). The comprehensive measuring instrument (231) includes a concentration sensor, a pressure sensor, and a flow sensor, which are respectively used to measure the concentration, gas pressure, and volume flow of the gas in the extraction connecting pipe (23).

2. A gas drainage adaptive control system according to claim 1, characterized in that: The electrically controlled valve (3) comprises a valve body (31), a valve cover (32), a valve core (33), a valve stem (34) and a driving mechanism (35); the valve core (33) is located in the valve body (31); one end of the valve stem (34) penetrates the valve body (31) and is connected to the valve core (33); the other end of the valve stem (34) is connected to the output end of the driving mechanism (35); the driving mechanism (35) is provided on the valve cover (32); and the valve cover (32) is mounted on the valve body (31); A valve port (311) is formed in the valve body (31), and the valve core (33) is used to close the valve port (311); the valve core (33) includes an integrally formed main valve core (331) and an auxiliary valve core (333); a sealing cone port (312) is provided on the upper edge of the valve port (311), and a conical surface (332) adapted to the sealing cone port (312) is formed on the outer peripheral surface of the main valve core (331); the auxiliary valve core (333) includes at least two valve plates (334), the valve plates (334) are fixed to the bottom surface of the valve core (33), one end of each valve plate (334) is connected and fixed, and an arc-shaped valve disc (335) is fixed to the end of each valve plate (334) away from each other, and the arc-shaped valve disc (335) is in contact with the inner peripheral surface of the valve port (311).

3. The gas drainage adaptive control system according to claim 2, characterized in that: The width of the arc-shaped valve plate (335) decreases in a direction away from the valve stem (34).

4. The gas drainage adaptive control system according to claim 3, characterized in that: A packing cavity is formed between the valve cover (32) and the valve stem (34), and a sealing packing (322) is arranged in the packing cavity. The sealing packing (322) includes an inner ring (323), an outer ring (324) and a first sealing ring (325). The outer ring (324) is coaxial with the inner ring (323) and is located outside the inner ring (323). The first sealing ring (325) is filled between the inner ring (323) and the outer ring (324). The cross-section of the first sealing ring (325) is in the shape of a waist drum. A pressure cover (321) is connected to the valve cover (32), and the pressure cover (321) is pressed against the top wall of the sealing packing (322).

5. The gas drainage adaptive control system according to claim 4, characterized in that: An air intake pipe portion (36) is formed on the valve body (31), and the outer peripheral surface diameter of the air intake pipe portion (36) decreases in a direction away from the valve body (31). The outer side of the air intake pipe portion (36) is threadedly connected to a locking sleeve (361), and the inner hole of the locking sleeve (361) is a tapered hole and is adapted to the outer wall of the air intake pipe portion (36).

6. The gas drainage adaptive control system according to claim 5, characterized in that: An annular groove is provided on the inner wall of the air intake pipe portion (36), and a second sealing ring (362) is provided in the annular groove. A retaining ring (364) is integrally formed at one end of the locking sleeve (361) away from the air intake pipe portion (36). When the locking sleeve (361) is threadedly mounted on the air intake pipe portion (36), the retaining ring (364) abuts against the end face of the air intake pipe portion (36). A sealing felt (363) is fixed to the retaining ring (364) near the end face of the air intake pipe portion (36).

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