CN-117847572-B - Remote control ignition device for coal bed gas drainage test well

CN117847572BCN 117847572 BCN117847572 BCN 117847572BCN-117847572-B

Abstract

The invention discloses a remote control ignition device for a coal bed gas drainage test well, which comprises an ignition assembly and combustion-supporting gas tanks, wherein a plurality of ignition assemblies are communicated in parallel through gas production pipes, control valves are arranged at the connection ends of the gas production pipes and the ignition assemblies, a coal bed gas concentration detection device is further arranged at the control valves, the combustion-supporting gas tanks are positioned at the side of the ignition assemblies and are communicated with the ignition assemblies through branch pipes, flow control valves are arranged at the connection ends of the branch pipes and the ignition assemblies, combustion cylinders are arranged at the upper ends of the ignition assemblies, and a test device is arranged outside the ignition assemblies.

Inventors

ZHANG CHAO
WANG WENQING
MA JI
MA LEI
ZHENG XUFENG
LI XIAN
GUO QING
SUN WENYI
GUO WENLI
CHEN LIANGBAO
ZHANG JINSHAN
NIU GUOBIN

Assignees

宁夏回族自治区煤炭地质局

Dates

Publication Date: 20260508
Application Date: 20231229

Claims (7)

1. The remote control ignition device for the coal bed gas drainage test well is characterized by comprising an ignition assembly (1) and a combustion-supporting gas tank (4), wherein a plurality of ignition assemblies (1) are communicated in parallel through gas production pipes (2), control valves (3) are arranged at the connection ends of the gas production pipes (2) and the ignition assemblies (1), a coal bed gas concentration detection device is further arranged at the control valves (3), the combustion-supporting gas tank (4) is positioned beside the ignition assemblies (1), the combustion-supporting gas tank is communicated with the ignition assemblies (1) through branch pipes (5), flow control valves (6) are arranged at the connection ends of the branch pipes (5) and the ignition assemblies (1), combustion cylinders (7) are arranged at the upper ends of the ignition assemblies (1), and a test device is arranged outside the ignition assemblies (1); the ignition assembly (1) comprises: the cylinder body (11) is of a top-cover-free cylinder structure, and an air inlet hole is formed in the middle of a bottom cover of the cylinder body (11); The inner cylinder (12) is fixedly arranged in the middle of the cylinder body (11), a gas channel is formed in the middle of the inner cylinder (12), fixing frames (15) are fixedly arranged at the upper end and the lower end of the gas channel, a rotating shaft (13) is penetrated in each fixing frame (15) in a rotating way, and spiral fan blades (14) are fixedly arranged on the outer periphery side of the rotating shaft (13) in the gas channel; The motor (16) is positioned between the built-in cylinder (12) and the inner wall of the cylinder body (11), and an output shaft of the motor (16) extends out of the upper end of the built-in cylinder (12) and is driven by the rotating shaft (13) through a belt; the guide plate (17) is coaxially and fixedly arranged at the lower end part of the rotating shaft (13), and the cross section of the guide plate (17) is of a W-like structure; explosion-proof partition plates (18) are arranged above the built-in cylinder (12) in the cylinder body (11) at intervals; The combustion cylinder (7) comprises: an outer cylinder (71) coaxially and hermetically mounted at the upper end of the cylinder (11), wherein an annular extension part is inwardly arranged at the upper end of the outer cylinder (71); the impact plate (72) is longitudinally and slidably arranged at the lower end inside the outer cylinder (71), and a blasting chamber (101) is formed between the impact plate (72) and the explosion-proof baffle plate (18); an inner cylinder (74) coaxially fixed at the lower end of the extension part, wherein the outer wall of the inner cylinder (74) and the inner wall of the outer cylinder (71) are arranged at intervals; The bidirectional telescopic rods (73) are located between the inner cylinder (74) and the outer cylinder (71), a plurality of bidirectional telescopic rods are evenly distributed at intervals along the periphery of the axis of the inner cylinder (74), and two ends of each bidirectional telescopic rod (73) are respectively fixedly arranged between the impact plate (72) and the extending part.
2. The remote control ignition device of the coal bed methane drainage test well according to claim 1, wherein an annular pipe fitting (51) is arranged on the inner wall of the cylinder body (11) and between the built-in cylinder (12) and the guide plate (17), and a plurality of auxiliary air holes (52) which incline downwards and are communicated with the branch pipes (5) are formed in the inner side of the annular pipe fitting (51) around the circumference of the annular pipe fitting.
3. The remote control ignition device for the coal bed methane drainage test well of claim 1, wherein a plurality of filter holes are uniformly formed in the spiral fan blade (14), and the spiral fan blade (14) and the guide plate (17) are made of hygroscopic materials.
4. The remote control ignition device for the coal bed methane drainage test well is characterized in that a collection bin (8) is fixedly arranged at the lower end of the cylinder body (11), a plurality of diversion holes (111) are formed in the lower end of the bottom cover of the cylinder body (11), and the diversion holes (111) are communicated with the collection bin (8).
5. The remote control ignition device for the coal bed methane drainage test well, as set forth in claim 1, is characterized in that the explosion-proof partition plate (18) is provided with an air outlet hole, and a first plate valve (19) is arranged at the air outlet hole.
6. The remote control ignition device for the coal bed methane drainage test well is characterized in that an air outlet pipe (75) is arranged in the middle of the impact plate (72) in a penetrating mode, igniters (76) are arranged at the upper end and the lower end of the air outlet pipe (75), a plurality of air grooves are formed in the adjacent sections of the air outlet pipe (75) and the igniters (76), and a second plate valve (77) is arranged in the impact plate (72) and located at the air outlet pipe (75).
7. The remote control ignition device for the coal bed methane drainage test well according to claim 1, wherein a pressure sensing device is arranged in each bidirectional telescopic rod (73).

Description

Remote control ignition device for coal bed gas drainage test well Technical Field The invention relates to the technical field of coal bed gas combustion treatment equipment, in particular to a remote control ignition device for a coal bed gas drainage test well. Background The main component of coalbed methane is methane, which is an associated gas of coal in the process of generation and deterioration, also known as gas, and has a calorific value almost the same as natural gas, and is relatively inexpensive, and is a clean fuel. In the coal bed gas resource pre-detection process, a test well and an ignition device are usually required to be arranged, analysis and research are carried out on the combustion and explosion characteristics of the coal bed gas, the existing ignition device is single in function and can only carry out single combustion and explosion characteristic test, applicability is low, and the stability of an experimental process is influenced due to the fact that the extracted coal bed gas usually carries water vapor, and the accuracy of an experimental result and the safety of the experimental process are influenced. Accordingly, there is a need for a remote ignition device for a coal bed methane drainage test well, which solves the above-mentioned problems in the background art. Disclosure of Invention In order to achieve the purpose, the technical scheme is that the remote control ignition device for the coal bed gas drainage test well comprises an ignition assembly and combustion supporting gas tanks, wherein a plurality of ignition assemblies are communicated in parallel through gas production pipes, control valves are arranged at the connecting ends of the gas production pipes and the ignition assemblies, a coal bed gas concentration detection device is further arranged at the control valves, the combustion supporting gas tanks are located beside the ignition assemblies and are communicated with the ignition assemblies through branch pipes, flow control valves are arranged at the connecting ends of the branch pipes and the ignition assemblies, combustion cylinders are arranged at the upper ends of the ignition assemblies, and a test device is arranged outside the ignition assemblies. As a preferred embodiment of the present invention, the ignition module includes: the cylinder body is of a cylinder structure without a top cover, and an air inlet hole is formed in the middle of a bottom cover of the cylinder body; The inner cylinder is fixedly arranged in the middle of the cylinder body, a gas channel is formed in the middle of the inner cylinder, fixing frames are fixedly arranged at the upper end and the lower end of the gas channel, rotating shafts are rotatably arranged in the fixing frames in a penetrating mode, and spiral fan blades are fixedly arranged on the outer periphery side of the rotating shafts in the gas channel; A motor positioned between the built-in cylinder and the inner wall of the cylinder body, and an output shaft of the motor extends out of the upper end of the built-in cylinder and is driven by the rotating shaft through a belt, and The guide plate is coaxially and fixedly arranged at the lower end part of the rotating shaft, and the cross section of the guide plate is of a W-like structure. As a preferable technical scheme of the invention, an annular pipe fitting is arranged on the inner wall of the cylinder body and positioned between the built-in cylinder and the guide plate, and a plurality of auxiliary air holes which incline downwards and are communicated with the branch pipes are formed on the inner side of the annular pipe fitting around the circumference of the annular pipe fitting. As a preferable technical scheme of the invention, the spiral fan blade is uniformly provided with a plurality of filter holes, and the spiral fan blade and the guide plate are both made of hygroscopic materials. As a preferable technical scheme of the invention, the lower end of the cylinder body is fixedly provided with a collecting bin, the lower end of the bottom cover of the cylinder body is provided with a plurality of diversion holes, and the diversion holes are communicated with the collecting bin. As a preferable technical scheme of the invention, explosion-proof partition plates are arranged above the built-in cylinder in the cylinder body at intervals, air outlet holes are formed in the explosion-proof partition plates, and a first plate valve is arranged at the air outlet holes. As a preferred embodiment of the present invention, the combustion cylinder includes: the outer cylinder is coaxially and hermetically arranged at the upper end of the cylinder body, and an annular plate-shaped extension part is inwards arranged at the upper end of the outer cylinder; The impact plate is longitudinally and slidably arranged at the lower end of the inner part of the outer cylinder, and a blasting chamber is formed between the impact plate and the explosion-proof parti