Downward gas extraction, drilling and drainage integrated control system

Abstract

The utility model discloses a down-going gas extraction drilling pumping and drainage integrated control system which comprises a control unit, a compressed air unit comprises an air inlet main pipe, the air inlet main pipe is respectively communicated with a compressed air pipeline and an extraction pipeline through a tee joint A, the compressed air pipeline is connected with a positive pressure main valve, and the extraction pipeline is connected with a negative pressure main valve. The air inlet main pipe is communicated with a plurality of air inlet branch pipes, the plurality of air inlet branch pipes are correspondingly communicated with a plurality of groups of pumping and draining units respectively, the plurality of groups of pumping and draining units correspondingly pump and drain accumulated water in a plurality of downward drill holes, and each group of pumping and draining unit comprises a tee joint B connected with the air inlet branch pipes; the end, close to the downward drill hole, of the tee joint B is communicated with a drill hole gas extraction pipe through a quick connector, the end, away from the downward drill hole, of the tee joint B is connected with a compressed air drainage pipe through a pagoda piston, and the end, located outside the tee joint B, of the compressed air drainage pipe is connected with a drainage electromagnetic valve. According to the utility model, the defect that manual drainage is not timely and not in place can be overcome while human input is saved, the drainage efficiency is greatly improved, and the gas treatment effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic drainage of drilling holes, and in particular to an integrated control system for downward gas extraction drilling holes. Background Art

[0002] Water accumulation in downward gas extraction boreholes is a key factor restricting the efficiency and effect of gas extraction. There are a huge number of extraction boreholes in the tunnel, and the efficiency of manual drainage is very low. It can only cope with the drainage problem of water accumulation in a small number of downward boreholes within a small range. Draining a large number of downward boreholes with water accumulation requires a lot of manpower, which not only increases the labor cost, but also fails to drain the water in the borehole in time, affecting the gas extraction effect. Utility Model Content

[0003] In order to solve the technical problems mentioned in the background technology, the utility model provides an integrated control system for downward gas extraction drilling and drainage.

[0004] The utility model adopts the following technical solutions: a downward gas extraction drilling integrated control system, including a control unit, a wireless communication unit, a compressed air unit and a plurality of groups of extraction units;

[0005] The compressed air unit comprises an air inlet main pipe;

[0006] The air inlet main pipe is connected to the compressed air pipeline and the extraction pipeline respectively through a tee A;

[0007] The compressed air pipeline is connected to a positive pressure main valve, and a positive pressure sensor is arranged in the positive pressure main valve;

[0008] The extraction pipeline is connected to a negative pressure main valve; a negative pressure sensor is arranged in the negative pressure main valve;

[0009] The air inlet main pipe is connected to a plurality of air inlet branch pipes;

[0010] A plurality of the air inlet branch pipes are respectively connected to a plurality of groups of extraction and exhaust units;

[0011] Several groups of pumping units are used to pump out the accumulated water in several descending boreholes;

[0012] Each group of the extraction units includes a tee B connected to the air inlet branch pipe;

[0013] The end of the tee B close to the downhole is connected to the borehole gas extraction pipe through a quick connector;

[0014] The end of the tee B away from the downward drilling hole is connected to the compressed air drainage pipe through the pagoda piston;

[0015] One end of the compressed air drainage pipe outside the tee B is connected to the drainage solenoid valve and is connected to the drain pipe through a quick elbow;

[0016] The end of the drain pipe is connected to a gas-water separator to discharge the accumulated water;

[0017] One end of the compressed air drainage pipe located in the tee B penetrates into the borehole gas extraction pipe to discharge the accumulated water in the descending borehole;

[0018] The drainage solenoid valve is connected to the control unit via a wireless communication unit, and is used to transmit water level information in the compressed air drainage pipe to the control unit;

[0019] The positive pressure main valve and the negative pressure main valve are connected to the control unit via a wireless communication unit, and are used to execute the valve opening and closing instructions issued by the control unit after judging the water level information.

[0020] Furthermore, manual backup valves A are provided on the compressed air pipeline and the extraction pipeline.

[0021] Furthermore, a valve opening signal sensor and a valve closing signal sensor are arranged in the drainage solenoid valve; the valve opening signal sensor adopts an annular film pressure sensor; and the valve closing signal sensor adopts a conductivity sensor.

[0022] Furthermore, a manual backup valve B and an air measuring valve are arranged at the connection between the tee B and the air inlet branch pipe and on the air inlet branch pipe.

[0023] Furthermore, a quick-connect ball valve is provided on the compressed air drainage pipe between the three-way B and the drainage solenoid valve.

[0024] Compared with the prior art, the advantages of the utility model are:

[0025] The utility model designs an integrated control system for downward gas extraction drilling, which has positive pressure air pressure pipelines and negative pressure extraction pipelines. It realizes automatic switching function through wireless communication units, and can meet the layout of extraction negative pressure, air supply positive pressure, and drainage outlets. At the same time, it ensures the stability of the extraction system. The system can timely and effectively remove the water in the borehole through the automatic control of the solenoid valve, so that the gas extraction borehole can maintain long-term and efficient extraction, realize unmanned automatic control, save manpower input, and solve the drawbacks of untimely and inadequate manual drainage, greatly improve drainage efficiency, and ensure gas control effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the utility model's integrated control system for downward gas extraction drilling and drainage;

[0027] Figure 2 It is a frame diagram of the integrated control system for downward gas extraction drilling and drainage of the utility model.

[0028] in:

[0029] 1-air inlet main pipe, 2-tee A, 3-compressed air pipeline, 4-extraction pipeline, 5-positive pressure main valve, 6-negative pressure main valve, 7-air inlet branch pipe, 8-downward drilling hole, 9-tee B, 10-quick connector, 11-drilling gas extraction pipe, 12-pagoda piston, 13-compressed air drainage pipe, 14-drainage solenoid valve, 15-quick elbow, 16-drain pipe, 17-gas-water separator, 18-manual standby valve A, 19-manual standby valve B, 20-gas measuring valve, 21-quick connect ball valve. DETAILED DESCRIPTION

[0030] In order to facilitate those skilled in the art to understand the technical solution of the utility model, further description is now made with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model.

[0031] In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it is apparent that one or more embodiments may be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0032] Please refer to Figure 1 , which is a schematic diagram of the overall structure of the integrated control system for downward gas extraction drilling of the utility model, including a control unit, a wireless communication unit, an air pressure unit and several groups of extraction units. The air pressure unit includes an air inlet main pipe 1, which is connected to the air pressure pipeline 3 and the extraction pipeline 4 through a tee A2. The air pressure pipeline 3 is used to provide air pressure to the air inlet main pipe 1 to press out the accumulated water in the downward borehole, and the extraction pipeline 4 is used to extract the gas in the downward borehole. In this embodiment, the positive pressure main valve 5 is connected to the air pressure pipeline 3, and a positive pressure sensor is arranged in the positive pressure main valve 5. The negative pressure main valve 6 is connected to the extraction pipeline 4; and a negative pressure sensor is arranged in the negative pressure main valve 6. The positive pressure main valve 5 and the negative pressure main valve 6 are used to receive the opening and closing valve signals transmitted by the control unit to open or close the air pressure pipeline 3 and the extraction pipeline 4. The air inlet main pipe 1 is connected to a plurality of air inlet branch pipes 7 , and the plurality of air inlet branch pipes 7 are respectively connected to a plurality of groups of pumping and drainage units, and the plurality of groups of pumping and drainage units are corresponding to pumping and draining the accumulated water in a plurality of descending boreholes 8 .

[0033] like Figure 1As shown, each group of extraction and drainage units includes a tee B9 connected to the air inlet branch pipe 7, and the end of the tee B9 close to the descending borehole 8 is connected to the borehole gas extraction pipe 11 through a quick connector 10, and the end of the tee B9 away from the descending borehole 8 is connected to the compressed air drainage pipe 13 through a pagoda piston 12. As shown in the figure, in this embodiment, the pagoda piston 12 can be freely removed from the tee B9. Since the compressed air drainage pipe 13 is fixed on the pagoda piston 12, the compressed air drainage pipe 13 can be freely removed during assembly, which is convenient for maintenance. The end of the compressed air drainage pipe 13 located outside the tee B9 is connected to the drainage solenoid valve 14, and is connected to the drain pipe 16 through a quick elbow 15. The end of the drain pipe 16 is connected to the gas-water separator 17 to discharge the accumulated water. The end of the compressed air drainage pipe 13 located inside the tee B9 penetrates into the borehole gas extraction pipe 11 to discharge the accumulated water in the descending borehole 8.

[0034] In some embodiments, a manual backup valve A18 is provided on both the compressed air pipeline 3 and the extraction pipeline 4.

[0035] In some embodiments, a manual standby valve B19 and an air measuring valve 20 are provided at the connection between the tee B9 and the air inlet branch pipe 7 and on the air inlet branch pipe 7. A quick-connect ball valve 21 is also provided on the compressed air drainage pipe 13 between the tee B9 and the drainage solenoid valve 14.

[0036] like Figure 2 As shown, in terms of signal transmission, in this embodiment, the drainage solenoid valve 14 is connected to the control unit through a wireless communication unit, which is used to transmit the water level information in the compressed air drainage pipe 13 to the control unit. The positive pressure main valve 5 and the negative pressure main valve 6 are connected to the control unit through a wireless communication unit, which are used to execute the valve opening and closing instructions issued by the control unit after judging the water level information.

[0037] During the specific implementation, the negative pressure main valve is started to perform the extraction operation. First, the time interval for the drainage solenoid valve 14 to scan the water level in the corresponding compressed air drainage pipe 13 is set in the control unit. For example, the scanning cycle is set to scan once every 20 minutes, and each drainage solenoid valve is timed synchronously.

[0038] In specific implementation, the sensors in the drainage solenoid valve are configured to include a valve opening signal sensor and a valve closing signal sensor. The valve opening signal sensor adopts an annular film pressure sensor, and the valve closing signal sensor adopts a conductivity sensor.

[0039] When the pressure value received by the valve opening signal sensor of the drainage solenoid valve is less than 50g, it means that there is overload water in the borehole. At this time, the drainage solenoid valve should send a compressed air demand signal with the drainage solenoid valve number to the control unit.

[0040] After the control unit receives the valve opening and drainage signal from the drainage solenoid valve, it stores the corresponding drainage solenoid valve number, counts the numbers of all drainage solenoid valves that need to be drained within the time interval, resets the timer when the time interval expires, and first sends a valve closing command to the negative pressure main valve 6.

[0041] After the negative pressure main valve 6 receives the valve closing command, the negative pressure main valve confirms the negative pressure sensor value of the negative pressure main valve. If the value is greater than 5Kpa, the valve closing command is executed normally. If the value is less than 5Kpa, the valve closing action is not executed, and the low negative pressure indicator light is turned on. When the negative pressure recovers to above 5Kpa, the low negative pressure indicator light is turned off and the valve closing command is continued.

[0042] After the negative pressure main valve 6 is closed, the control unit sends a valve opening instruction to the positive pressure main valve.

[0043] After the positive pressure main valve receives the valve opening command, it confirms the positive pressure sensor value. If the value is greater than 0.4Mpa, the valve opening command is executed. If the value is less than 0.4Mpa, the valve opening action is not executed, and the air supply pressure is too low indicator light is turned on. When the pressure recovers to above 0.4Mpa, the low pressure indicator light is turned off and the valve opening command continues to be executed.

[0044] The control unit sends a valve opening command to the corresponding numbered drainage solenoid valve 14 to start drainage;

[0045] When the conductivity sensor of the valve closing signal sensor of a single drainage solenoid valve 14 is less than 20μs / cm, it means that the amount of water in the borehole has fallen below the preset value, and the drainage of the drainage solenoid valve 14 is completed, the drainage valve performs the valve closing action, and sends a valve closing signal with the drainage solenoid valve number to the control unit at the same time;

[0046] The control unit receives and checks the valve closing number information of all the drainage solenoid valves 14. When it is consistent with the stored valve opening drainage signal information, it means that all the drainage solenoid valves 14 have completed drainage. The control unit clears the stored information of the sub-number and sends a valve opening signal to the negative pressure main valve at the same time. The extraction pipeline 4 performs extraction normally, sends a valve closing signal to the positive pressure main valve, closes the compressed air pipeline, and sends a command to re-time the scanning cycle to the drainage solenoid valve, thereby completing a drainage cycle.

[0047] In summary, the utility model designs a downward gas extraction borehole drainage integrated control system with positive pressure air pressure pipelines and negative pressure extraction pipelines, and realizes automatic switching function through wireless communication units, which can meet the layout of extraction negative pressure, air supply positive pressure, and drainage outlets. At the same time, the stability of the extraction system is guaranteed. The system can timely and effectively remove the accumulated water in the borehole through the automatic control of the solenoid valve, so that the gas extraction borehole can maintain long-term and efficient extraction, and realize unmanned automatic control. While saving manpower investment, it can solve the drawbacks of untimely and inadequate manual drainage, greatly improve drainage efficiency, and ensure gas control effects.

[0048] The above embodiments are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A downhole gas extraction and drainage integrated control system, characterized in that: It includes a control unit, a wireless communication unit, a compressed air unit and several groups of extraction units; The compressed air unit comprises an air inlet main pipe (1); The air inlet main pipe (1) is connected to the compressed air pipeline (3) and the extraction pipeline (4) respectively through a tee A (2); The compressed air pipeline (3) is connected to a positive pressure main valve (5), and a positive pressure sensor is arranged in the positive pressure main valve (5); The extraction pipeline (4) is connected to a negative pressure main valve (6); a negative pressure sensor is arranged in the negative pressure main valve (6); The air inlet main pipe (1) is connected to a plurality of air inlet branch pipes (7); The plurality of air inlet branch pipes (7) are respectively connected to a plurality of groups of extraction and exhaust units; A plurality of groups of pumping units are used to pump out the accumulated water in a plurality of descending boreholes (8); Each group of the exhaust units comprises a tee B (9) connected to the air inlet branch pipe (7); One end of the tee B (9) close to the downhole borehole (8) is connected to the borehole gas extraction pipe (11) via a quick connector (10); The end of the tee B (9) away from the downhole (8) is connected to the compressed air drainage pipe (13) through the pagoda piston (12); One end of the compressed air drainage pipe (13) outside the tee B (9) is connected to a drainage solenoid valve (14) and is connected to a drain pipe (16) via a quick elbow (15); The end of the drain pipe (16) is connected to a gas-water separator (17) to discharge the accumulated water; One end of the compressed air drainage pipe (13) located in the tee B (9) penetrates into the borehole gas extraction pipe (11) to discharge the accumulated water in the descending borehole (8); The drainage solenoid valve (14) is connected to the control unit via a wireless communication unit, and is used to transmit water level information in the compressed air drainage pipe (13) to the control unit; The positive pressure main valve (5) and the negative pressure main valve (6) are connected to the control unit via a wireless communication unit and are used to execute the valve opening and closing instructions issued by the control unit after judging the water level information.

2. The integrated control system for downward gas extraction drilling and drainage according to claim 1 is characterized in that: A manual standby valve A (18) is provided on both the compressed air pipeline (3) and the extraction pipeline (4).

3. The integrated control system for downward gas extraction drilling according to claim 2 is characterized in that: The water level signal sensor in the drainage solenoid valve (14) comprises a valve opening signal sensor and a valve closing signal sensor; the valve opening signal sensor adopts an annular film pressure sensor; and the valve closing signal sensor adopts a conductivity sensor.

4. The integrated control system for downward gas extraction drilling according to claim 3 is characterized in that: A manual standby valve B (19) and an air measuring valve (20) are provided at the connection between the three-way valve B (9) and the air inlet branch pipe (7) and on the air inlet branch pipe (7).

5. The integrated control system for downward gas extraction drilling according to claim 4 is characterized in that: A quick-connect ball valve (21) is provided on the compressed air drainage pipe (13) between the three-way B (9) and the drainage solenoid valve (14).

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