Underground coal mine low-cost gas extraction hole refined multi-parameter monitoring system

Abstract

The invention belongs to the technical field of gas extraction, and discloses an underground coal mine low-cost gas extraction hole refined multi-parameter monitoring system which comprises a plurality of extraction pipes, each extraction pipe is connected with a plurality of branch pipes, the extraction pipes are jointly connected with a gas main pipeline, a plurality of extraction holes are formed in the position, corresponding to any branch pipe, in a coal seam, and the gas main pipeline is connected with a gas main pipeline. The extraction holes are communicated and connected with the corresponding branch pipes, the number of the collection boxes is equal to that of the branch pipes, the collection boxes and the branch pipes are in one-to-one correspondence, any extraction hole in each branch pipe is independently connected with the corresponding collection box through a sampling pipe, a first electric valve is arranged on each sampling pipe, and a data collection module is integrated in each collection box; through the arrangement of an air blowing pipe and a collecting pipe, residual gas and waste residues in the to-be-detected extraction hole can be effectively discharged, and the accuracy of data detection of the extraction hole is improved; and a plurality of extraction holes can be detected one by one, so that the detection result of each extraction hole is more accurate.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas drainage, and particularly relates to a refined multi-parameter monitoring system for low-cost gas drainage holes in coal mines. Background Art

[0002] In coal mine gas drainage operations, the monitoring of gas parameters in drainage holes is an important basis for evaluating drainage effects and ensuring safe production. However, during actual monitoring, there are often residual mixed gases (such as air, low-concentration gas, etc.) after the previous round of drainage operations in the drainage holes. These residual gases will mix with the fresh gas being drained currently, resulting in deviations in key parameters such as monitored gas concentration and flow rate.

[0003] For example, in the Chinese patent with the publication number CN119288596A, a gas drainage parameter management system and method, although the monitoring efficiency is improved by deploying sensors and an automated acquisition system, there is still a lack of pretreatment means for the environment in the drainage holes and it is unable to effectively solve the problem of interference of residual gases on monitoring results. Therefore, in the prior art, there is a problem that residual gases in the drainage holes are likely to interfere with the accuracy of monitoring results. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a refined multi-parameter monitoring system for low-cost gas drainage holes in coal mines, which solves the problem that residual gases in the drainage holes in the prior art are likely to interfere with the accuracy of monitoring results.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A refined multi-parameter monitoring system for low-cost gas drainage holes in coal mines includes a plurality of drainage pipes, and a plurality of branch pipes are connected to each drainage pipe. The plurality of drainage pipes are commonly connected to a main gas pipeline. A plurality of drainage holes are opened at the corresponding positions of any branch pipe in the coal seam, and the drainage holes are all connected to the corresponding branch pipes in a through manner. The system further includes:

[0007] Collection boxes, the number of collection boxes is equal to and corresponds one by one with the number of branch pipes. Any drainage hole at the branch pipe is separately connected to the corresponding collection box through a sampling pipe, and a first electric valve is provided on each sampling pipe. A data acquisition module is integrated in the collection box, and the data acquisition module is used to detect the gas concentration at any drainage hole and the gas flow rate in the corresponding branch pipe;

[0008] Blow pipes, the number of blow pipes is equal to and corresponds one by one with the number of collection boxes. One end of each blow pipe is connected to a gas supply device, and the other end of each blow pipe is connected to a plurality of confluence pipes. The number of confluence pipes is equal to and corresponds one by one with the number of drainage holes at the corresponding collection box. The end of the confluence pipe away from the blow pipe extends into the bottom of the corresponding drainage hole, and a second electric valve is provided on each confluence pipe;

[0009] Communication module and data processing module. A communication module is provided in the collection box. The signal receiving end of the communication module is electrically connected to the data acquisition module, and the communication module transmits the detection data of the data acquisition module to the data processing module;

[0010] The data processing module is used to analyze and process the received data and generate a control instruction;

[0011] Control module. The signal receiving end of the control module is connected to the signal output end of the data processing module and is used to control and adjust the gas drainage intensity;

[0012] Power supply module. The power input ends of the communication module, data processing module and control module are all electrically connected to the power supply module;

[0013] The data acquisition module includes a methane concentration sensor, a carbon monoxide concentration sensor and a flow sensor;

[0014] The methane concentration sensor is used to detect the methane concentration in the gas sent into the collection box by the sampling pipe;

[0015] The carbon monoxide concentration sensor is used to detect the carbon monoxide concentration in the gas sent into the collection box by the sampling pipe;

[0016] The flow sensor is arranged on the corresponding branch pipe and is used to detect the gas flow in the branch pipe;

[0017] A sealed detection cavity is provided in the collection box. One end of each of the multiple sampling pipes corresponding to the collection box is connected to the inside of the detection cavity in a penetrating manner. An exhaust pipe is connected to each of the blow pipes, and the other end of the exhaust pipe is connected to the detection cavity of the corresponding collection box in a penetrating manner. A seventh electric valve is arranged on the exhaust pipe, and the detection ends of the methane concentration sensor and the carbon monoxide concentration sensor are both arranged in the detection cavity;

[0018] A hose is used to connect between the extraction hole and the corresponding branch pipe;

[0019] The control module includes a third electric valve, a fourth electric valve and a fifth electric valve;

[0020] A third electric valve is arranged on each of the hoses, a fourth electric valve is arranged at the end of the branch pipe close to the extraction pipe, and a fifth electric valve is arranged at the position of the extraction pipe close to the main gas pipeline;

[0021] A sixth electric valve is arranged at one end of the extraction pipe far from the main gas pipeline. When the sixth electric valve is opened, it is used to discharge water or coal slag in the extraction pipe

[0022] The data processing module includes a programmable host that can be controlled;

[0023] The low-cost gas drainage hole refined multi-parameter monitoring system for underground coal mines further includes a ground control terminal, which is communicatively connected to the programmable host through the MODBUS RTU or MODBUS TCP / IP protocol;

[0024] Advantages of the present invention:

[0025] In this application, any extraction hole can be selected as the monitoring hole. During monitoring, first open the second electric valve on the manifold corresponding to the extraction hole, close the other second electric valves, and then inject compressed gas into the blowpipe through an external gas supply device. The compressed gas enters the bottom of the corresponding extraction hole through the blowpipe and the manifold, discharging the residual gas in the extraction hole. Then, turn off the gas supply device. After a period of time, the gas in the coal seam enters the extraction hole again. At this time, the gas in the extraction hole is extracted into the collection box through the sampling pipe and detected by the data acquisition module;

[0026] Through the settings of the blowpipe and the manifold, it is convenient to effectively discharge the residual gas and waste residues in the extraction hole to be detected, improving the accuracy of data detection for the extraction hole; and multiple extraction holes can be detected one by one, making the detection results for each extraction hole more accurate. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 is the overall system schematic diagram of the present invention;

[0029] Figure 2 is the partial structure schematic diagram of the branch pipe and the collection box of the present invention. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the 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 of 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 belong to the scope of protection of the present invention.

[0031] Such as Figures 1 to 2As shown in the figure, a refined multi-parameter monitoring system for low-cost gas drainage holes 600 in coal mines includes multiple drainage pipes 100. A plurality of branch pipes 200 are connected to each drainage pipe 100. The multiple drainage pipes 100 are jointly connected to a main gas pipeline 300. A plurality of drainage holes 600 are opened at the corresponding positions of any branch pipe 200 in the coal seam. The drainage holes 600 are all connected to the corresponding branch pipes 200 in a through manner. The system further includes:

[0032] Collection boxes 400, the number of collection boxes 400 is equal to and corresponds one by one to the number of branch pipes 200. Any drainage hole 600 at the branch pipe 200 is separately connected to the corresponding collection box 400 through a sampling pipe. A first electric valve is arranged on each sampling pipe. A data collection module is integrated in the collection box 400. The data collection module is used to detect the gas concentration at any drainage hole 600 and the gas flow rate in the corresponding branch pipe 200;

[0033] Blow pipes, the number of blow pipes is equal to and corresponds one by one to the number of collection boxes 400. One end of each blow pipe is connected to a gas supply device, and the other end of each blow pipe is connected to a plurality of confluence pipes. The number of confluence pipes is equal to and corresponds one by one to the number of drainage holes 600 at the corresponding collection box 400. The end of the confluence pipe away from the blow pipe extends into the bottom of the corresponding drainage hole 600, and a second electric valve is arranged on each confluence pipe;

[0034] A communication module and a data processing module. A communication module is arranged in each collection box 400. The signal receiving end of the communication module is electrically connected to the data collection module. The communication module transmits the detection data of the data collection module to the data processing module;

[0035] The data processing module is used to analyze and process the received data and generate a control instruction;

[0036] A control module, the signal receiving end of the control module is connected to the signal output end of the data processing module, and is used to control and adjust the gas drainage intensity;

[0037] A power supply module, the power input ends of the communication module, the data processing module and the control module are all electrically connected to the power supply module;

[0038] Taking each branch pipe 200 and its corresponding collection box 400 as a parameter monitoring unit, the structural explosion diagram of any unit is as Figure 2 shown;

[0039] Preferably, the first electric valve can adopt a solenoid valve, and the second electric valve can select an electric ball valve;

[0040] Any drainage hole 600 can be selected as the monitoring hole. During monitoring, first open the second electric valve on the manifold corresponding to the drainage hole 600, and close the other second electric valves. Then, inject compressed gas into the blowpipe through an external gas supply device. The compressed gas enters the bottom of the corresponding drainage hole 600 through the blowpipe and the manifold, discharging the residual gas in the drainage hole 600. Then, turn off the gas supply device. After a period of time, the gas in the coal seam enters the drainage hole 600 again. At this time, the gas in the drainage hole 600 is extracted through the sampling pipe into the collection box 400 and detected by the data acquisition module;

[0041] Through the settings of the blowpipe and the manifold, it is convenient to effectively discharge the residual gas and waste residue in the drainage hole 600 to be detected, improving the accuracy of the data detection of the drainage hole 600; and multiple drainage holes 600 can be detected one by one, making the detection results of each drainage hole 600 more accurate;

[0042] Preferably, the communication module is communicatively connected to the data processing module using the MODBUS communication protocol;

[0043] The data acquisition module includes a methane concentration sensor 500, a carbon monoxide concentration sensor 501, and a flow sensor 502;

[0044] The methane concentration sensor 500 is used to detect the methane concentration in the gas sent into the collection box 400 through the sampling pipe;

[0045] The carbon monoxide concentration sensor 501 is used to detect the carbon monoxide concentration in the gas sent into the collection box 400 through the sampling pipe;

[0046] The flow sensor 502 is arranged on the corresponding branch pipe 200 and is used to detect the gas flow in the branch pipe 200;

[0047] There is a sealed detection chamber in the collection box 400. One end of each of the multiple sampling pipes corresponding to the collection box 400 is connected to the inside of the detection chamber in a through manner. An exhaust pipe is connected to each blowpipe, and the other end of the exhaust pipe is connected to the detection chamber of the corresponding collection box 400 in a through manner. A seventh electric valve is arranged on the exhaust pipe. The detection ends of the methane concentration sensor 500 and the carbon monoxide concentration sensor 501 are arranged in the detection chamber; before detecting any drainage hole 600, open the seventh electric valve on the exhaust pipe, and open the first electric valve on the sampling pipe corresponding to the drainage hole 600 and the second electric valve on the corresponding manifold. Blow air into the bottom of the corresponding drainage hole 600 through the blowpipe and the manifold to discharge the residual gas at the bottom of the drainage hole 600. At the same time, the exhaust pipe also discharges the residual gas in the detection chamber and the sampling pipe during the previous detection, avoiding the interference of the residual gas in the collection box 400 and the sampling pipe during the previous detection on the current detection and further improving the accuracy of the detection of the corresponding drainage hole 600.

[0048] The extraction holes 600 and the corresponding branch pipes 200 are all connected by hoses.

[0049] The control module includes a third electric valve, a fourth electric valve 201 and a fifth electric valve 101.

[0050] Third electric valves are provided on the hoses, fourth electric valves 201 are provided at the ends of the branch pipes 200 close to the extraction pipes 100, and fifth electric valves 101 are provided at the positions of the extraction pipes 100 close to the main gas pipeline 300.

[0051] It should be noted that when performing parameter detection, the fourth electric valve 201 needs to be closed, and the fourth electric valve 201 is opened after the parameter detection is completed.

[0052] Preferably, the third electric valve, the fourth electric valve 201 and the fifth electric valve 101 can adopt butterfly valves. The third electric valve is used to control the gas flow and flow rate between the extraction holes 600 in the coal seam and the corresponding branch pipes 200; the fourth electric valve 201 is used to control the gas flow and flow rate between the branch pipes 200 and the extraction pipes 100; the fifth electric valve 101 is used to control the start or stop of the extraction operation and control the extraction intensity.

[0053] Sixth electric valves 102 are provided at the ends of the extraction pipes 100 far from the main gas pipeline 300. When the sixth electric valve 102 is opened, it is used to discharge water or coal slag in the extraction pipes 100; when the extraction holes 600 need to perform drainage and slag removal operations, the fifth electric valve 101 is closed, the fourth electric valve 201 and the sixth electric valve 102 are opened, and compressed gas is injected into the bottom of the extraction holes 600 through the setting of the blowing pipes and the confluence pipes. Then, the compressed gas blows the water and coal slag in the extraction holes 600 into the branch pipes 200, and discharges them into the extraction pipes 100 through the branch pipes 200, and then discharges them from the extraction pipes 100 through the sixth electric valve 102. After the drainage and slag removal are completed, the sixth electric valve 102 is closed, and the fifth electric valve 101 is opened to continue the extraction operation.

[0054] The data processing module includes a programmable host that can be controlled.

[0055] The refined multi-parameter monitoring system for low-cost gas extraction holes 600 in coal mines also includes a ground control terminal, and the ground control terminal is communicatively connected to the programmable host through the MODBUS RTU or MODBUS TCP / IP protocol.

[0056] The power supply module includes a power supply box 700, and a power supply box 700 for power supply is provided in each collection box 400.

[0057] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0058] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A refined multi-parameter monitoring system for low-cost gas drainage holes (600) underground in coal mines, comprising a plurality of drainage pipes (100), a plurality of branch pipes (200) are connected to each drainage pipe (100), the plurality of drainage pipes (100) are commonly connected to a main gas pipeline (300), a plurality of drainage holes (600) are formed at corresponding positions of any one branch pipe (200) in the coal seam, and the drainage holes (600) are all connected to the corresponding branch pipe (200) in a penetrating manner, characterized in that, It further includes: A collection box (400), the number of collection boxes (400) is equal to and corresponds one-to-one with the number of branch pipes (200). Any gas extraction hole (600) at the branch pipe (200) is individually connected to the corresponding collection box (400) through a sampling pipe. A first electric valve is provided on each sampling pipe. A data collection module is integrated in the collection box (400), and the data collection module is used to detect the gas concentration at any gas extraction hole (600) and the gas flow rate in the corresponding branch pipe (200); Blow pipes, the number of blow pipes is equal to and corresponds one-to-one with the number of collection boxes (400). One end of each blow pipe is connected to a gas supply device, and the other end of each blow pipe is connected to a plurality of confluence pipes. The number of confluence pipes is equal to and corresponds one-to-one with the number of gas extraction holes (600) at the corresponding collection box (400). The end of the confluence pipe away from the blow pipe extends into the bottom of the corresponding gas extraction hole (600), and a second electric valve is provided on each confluence pipe; A communication module and a data processing module. A communication module is provided in each collection box (400). The signal receiving end of the communication module is electrically connected to the data collection module, and the communication module transmits the detection data of the data collection module to the data processing module; The data processing module is used to analyze and process the received data and generate a control instruction; A control module, the signal receiving end of the control module is connected to the signal output end of the data processing module, and is used to control and adjust the gas extraction intensity; A power supply module, the power input ends of the communication module, the data processing module and the control module are all electrically connected to the power supply module.

2. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 1, characterized in that, The data collection module includes a methane concentration sensor (500), a carbon monoxide concentration sensor (501) and a flow sensor (502); The methane concentration sensor (500) is used to detect the methane concentration in the gas sent into the collection box (400) by the sampling pipe; The carbon monoxide concentration sensor (501) is used to detect the carbon monoxide concentration in the gas sent into the collection box (400) by the sampling pipe; The flow sensor (502) is arranged on the corresponding branch pipe (200) and is used to detect the gas flow rate in the branch pipe (200).

3. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 2, characterized in that, A sealed detection chamber is provided in the collection box (400). One ends of the plurality of sampling pipes corresponding to the collection box (400) are all connected to the inside of the detection chamber in a penetrating manner. An exhaust pipe is connected to each blow pipe, and the other end of the exhaust pipe is all connected to the detection chamber of the corresponding collection box (400) in a penetrating manner, and a seventh electric valve is provided on the exhaust pipe. The detection ends of the methane concentration sensor (500) and the carbon monoxide concentration sensor (501) are both arranged in the detection chamber.

4. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 3, characterized in that, A hose is used to connect between the gas extraction hole (600) and the corresponding branch pipe (200).

5. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 4, wherein The control module includes a third electric valve, a fourth electric valve (201) and a fifth electric valve (101); A third electric valve is provided on each hose. A fourth electric valve (201) is provided at the end of the branch pipe (200) close to the gas extraction pipe (100), and a fifth electric valve (101) is provided at the position of the gas extraction pipe (100) close to the main gas pipeline (300).

6. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 5, characterized in that, One end of the extraction pipe (100) far away from the main gas pipeline (300) is provided with a sixth electric valve (102), and when the sixth electric valve (102) is opened, it is used to discharge water or coal slag in the extraction pipe (100).

7. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in underground coal mines according to claim 6, characterized in that, The data processing module includes a programmable host that can be controlled.

8. The refined multi-parameter monitoring system for low-cost gas drainage holes (600) in coal mines according to claim 7, characterized in that The refined multi-parameter monitoring system for low-cost gas extraction holes (600) in coal mines also includes a ground control terminal, and the ground control terminal is communicatively connected to the programmable host through the MODBUS RTU or MODBUS TCP / IP protocol.

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