CN-224216650-U - Coal spontaneous combustion sign gas analysis device

Abstract

The utility model discloses a coal spontaneous combustion sign gas analysis device which comprises a plurality of sampling units, a controller and a gas chromatograph, wherein each sampling unit comprises a gas storage cylinder, the inside of the gas storage cylinder is provided with a vacuum cavity, sampling parts and detection parts are arranged at the two opposite ends of the gas storage cylinder, control valves are respectively arranged at the sampling parts and the detection parts, the controller is connected to the control valves, and the gas sample input end of the gas chromatograph is connected to the detection parts through pipelines. The analysis device can carry out on-site detection and analysis on the coal spontaneous combustion mark gas in the coal seam in the goaf, and can ensure the accuracy of detection results by carrying out layered sampling detection on different depths of the coal seam, and coal mine safety monitoring personnel can acquire the coal spontaneous combustion mark gas information of different layers of the coal seam, comprehensively know the development situation of spontaneous combustion in the coal seam, provide abundant and accurate data support for formulating targeted prevention and treatment measures, and effectively avoid potential safety hazards caused by incomplete mastering of spontaneous combustion conditions of the coal seam.

Inventors

• LI XIAOLONG
• WANG WEIFENG
• LIU WEI
• ZHENG JING
• HE PENGCHENG
• LIU YING
• LIU HANFEI
• KANG FURU

Assignees

• 陕西榆林能源集团榆神煤电有限公司
• 西安科技大学
• 陕西银河煤业开发有限公司
• 榆林市榆神煤炭榆树湾煤矿有限公司

Dates

Publication Date

20260508

Application Date

20250528

Claims (7)

1. 1. A coal spontaneous combustion flag gas analysis apparatus, characterized by comprising: the device comprises a plurality of sampling units, wherein each sampling unit comprises an air reservoir (1), the inside of each air reservoir (1) is provided with a vacuum cavity, two opposite ends of each air reservoir (1) are provided with a sampling part (2) and a detection part (3), each sampling part (2) and each detection part (3) are respectively provided with a control valve (4) for controlling each sampling part (2) and each detection part (3) to be communicated with each air reservoir (1), and each sampling part (2) is used for collecting coal spontaneous combustion mark gas in the depth to be detected of a goaf coal seam; The controller is connected to the control valve (4) and used for controlling the opening and closing of the control valve (4); The gas chromatograph (5), gas appearance input (19) of gas chromatograph (5) are connected to through the pipeline detection portion (3) for carry out real-time detection analysis to the spontaneous combustion sign gas of coal that gathers.
2. 2. The coal spontaneous combustion flag gas analysis device according to claim 1, wherein at least two sampling units are provided, and the two sampling units fix the sampling part (2) into the depth to be measured of the goaf coal seam through a fixing structure, the fixing structure comprises: The positioning plate (6), the bottom of the positioning plate (6) is provided with a plurality of fixing nails (20), and the top of the positioning plate (6) is provided with positioning holes (7) with corresponding sizes for the sampling part (2) of each sampling unit; The fixing plate (8), the said fixing plate (8) locates the top of the said locating plate (6), the top of the said fixing plate (8) is equipped with the pilot hole (9) of the corresponding size to the said air reservoir (1) of each said sampling unit; The fixing part (10) is arranged on the fixing plate (8) and is positioned on the outer periphery side of the guide hole (9), one side, away from the air cylinder (1), of the fixing part (10) is provided with a locking structure, and the movable end of the locking structure penetrates through the fixing part (10) and is connected with any one of a plurality of locking parts (12) arranged on the outer periphery of the air cylinder (1) along the axial direction.
3. 3. The coal spontaneous combustion sign gas analysis device according to claim 2, wherein the locking structure comprises a fixing rod (11), and the fixing rod (11) is connected with the locking part (12) in a plugging or threaded mode.
4. 4. The coal spontaneous combustion sign gas analysis device according to claim 1, wherein an exhaust port (13) is provided at the outer periphery of the gas cylinder (1), and the exhaust port (13) is connected to an intake end of a vacuum pump (15); an exhaust valve (14) is arranged at the exhaust port (13); the vacuum pump (15) and the exhaust valve (14) are respectively connected to the controller.
5. 5. The apparatus according to claim 1, wherein the sampling portion (2) is a taper pin provided with an air intake passage in an axial direction, and a small end of the sampling portion (2) is provided on a side away from the air reservoir (1).
6. 6. The coal spontaneous combustion sign gas analysis device according to claim 1, wherein the gas inlet of the sampling part (2) is provided with a filter layer (16), and the filter layer (16) is formed by stacking a plurality of layers of filter screens with different pore diameters.
7. 7. The coal spontaneous combustion sign gas analysis device according to claim 1, wherein a gas sample input end (19) of the gas chromatograph (5) is provided with a gas distribution disc (17), the interior of the gas distribution disc (17) is of a hollow structure, a gas inlet joint (18) is configured for the detection part (3) of each sampling unit at the gas inlet end of the gas distribution disc (17), and the gas outlet end of the gas distribution disc (17) is connected to the gas sample input end (19) of the gas chromatograph (5).

Description

Coal spontaneous combustion sign gas analysis device Technical Field The utility model relates to the technical field of coal mine safety, in particular to a coal spontaneous combustion mark gas analysis device. Background Goaf can appear in the coal mining process, the goaf can leave combustible materials such as coal and the like, spontaneous heating can be generated at a proper temperature, spontaneous combustion is caused, coal spontaneous combustion can cause underground fire disaster, serious gas explosion accidents can be caused after the coal spontaneous combustion contacts gas, huge loss is brought to the coal mine, and spontaneous combustion conditions of different coal mines are different, so that the detection of coal spontaneous combustion is very important. The utility model patent of China with the prior publication number of CN220381064U discloses a coal spontaneous combustion mark gas analysis device, which specifically comprises a compressed air storage tank, a coal sample tank and an experiment table, wherein a coal medium is stored in the coal sample tank, and the coal spontaneous combustion mark gas generated after being heated in a heating box is stored in a plurality of air storage tanks for simulation test of the experiment table, so that a chromatograph can continuously detect a plurality of coal spontaneous combustion mark gases, and the operation process is simple and the efficiency is high. However, in the heating process of the coal medium in the coal sample tank, the spontaneous combustion environment of the coal under the real scene cannot be simulated, for example, the coal beds with different depths are affected by outside air and moisture to different degrees, so that the surface coal beds are easily oxidized, and the detection results are different, and therefore, the conventional analysis device cannot effectively monitor the spontaneous combustion information of the coal beds with different depths in the goaf. Disclosure of utility model Accordingly, the present utility model is directed to a device for analyzing a coal spontaneous combustion mark gas, which solves the technical problems mentioned in the prior art. A coal spontaneous combustion flag gas analysis apparatus, the analysis apparatus comprising: The device comprises a plurality of sampling units, a plurality of sampling units and a plurality of sampling units, wherein the sampling units comprise air cylinders, the inside of each air cylinder is provided with a vacuum cavity, sampling parts and detection parts are arranged at the two opposite ends of each air cylinder, the sampling parts and the detection parts are respectively provided with a control valve, and the sampling parts are used for collecting coal spontaneous combustion mark gas after being inserted into the depth to be detected of a goaf coal seam; The controller is connected to the control valve and used for controlling the opening and closing of the control valve; The gas sample input end of the gas chromatograph is connected to the detection part through a pipeline and is used for detecting and analyzing the collected coal spontaneous combustion mark gas in real time. Optionally, the sampling unit is provided with two at least, and two the sampling unit will the sampling portion is fixed to the depth of awaiting measuring of goaf coal seam through fixed knot structure in, fixed knot constructs and includes: the bottom of the positioning plate is provided with a plurality of fixing nails, and the top of the positioning plate is provided with positioning holes with corresponding sizes for the sampling part of each sampling unit; The fixing plate is arranged at the top of the positioning plate, and guide holes with corresponding sizes are formed in the top of the fixing plate for the air cylinders of each sampling unit; The fixed part is arranged on the fixed plate and positioned on the outer periphery side of the guide hole, one side, away from the air cylinder, of the fixed part is provided with a locking structure, and the movable end of the locking structure penetrates through the fixed part and is connected with any one of a plurality of locking parts arranged on the outer periphery of the air cylinder along the axial direction. Optionally, the locking structure comprises a fixing rod, and the fixing rod is connected with the locking part in a plugging or threaded mode. Optionally, an exhaust port is arranged at the periphery of the air cylinder, and the exhaust port is connected to the air inlet end of the vacuumizing pump; an exhaust valve is arranged at the exhaust port; The vacuumizing pump and the exhaust valve are respectively connected to the controller. Optionally, the sampling portion is a taper nail provided with an air inlet channel along the axial direction, and the small end of the sampling portion is arranged at one side far away from the air cylinder. Optionally, the air inlet of the sampling part is provided with a filter laye