A pipeline connecting device for gas injection displacement gas extraction

Abstract

The utility model relates to a kind of pipe connection device for gas injection displacement gas extraction, belong to coal mine gas control and extraction technical field. Including the cuboid connection device of four sides and bottom end punch through, right side interface of connection device is connected with gas extraction pipeline, left side interface is connected with injection pipeline, lower interface is connected with drainage pipeline, front and rear side interface is connected with gas extraction pipeline;Gas extraction pipeline is used to extract gas, injection pipeline is used to inject displacement gas, drainage pipeline is used to discharge accumulated water, gas extraction pipeline is used to extract displacement gas to subsequent processing system. The utility model realizes injection, extraction, drainage and other multifunctional integration by connection device, compact structure, easy operation.

Description

Technical Field

[0001] This utility model relates to the field of coal mine gas control and extraction technology, and in particular to a pipeline connection device for gas injection to drive out and extract gas. Background Technology

[0002] In the process of coal mine gas extraction, in order to improve the gas extraction efficiency, gas injection displacement technology is often used, which involves injecting gas into the coal seam to displace adsorbed gas.

[0003] However, existing coal mine gas drainage and gas injection displacement systems have many technical defects, which restrict the improvement of operational efficiency and safety performance: First, the gas injection pipeline and gas drainage pipeline are mostly set up separately, resulting in a complex system structure and chaotic pipeline layout. This not only increases the difficulty of on-site installation and maintenance but also increases equipment investment costs and makes operation extremely inconvenient. Second, the functional integration is low. Existing devices have failed to effectively integrate real-time gas pressure monitoring and drainage functions. During the gas injection displacement process, it is impossible to keep track of changes in gas pressure inside the pipeline in a timely manner, and the water accumulated in the coal seam is difficult to drain quickly, seriously affecting the continuity of gas drainage. Thirdly, the gas injection method lacks flexibility. When the geological conditions of the coal seam change or the gas injection strategy needs to be adjusted according to the extraction effect, the existing equipment is unable to quickly switch between continuous and intermittent gas injection, resulting in insufficient contact between the displacement gas and the coal seam gas, unsatisfactory displacement effect, and difficulty in further improving the gas extraction efficiency. Fourthly, the safety assurance mechanism is imperfect. The existing system lacks effective monitoring and precise control of pipeline pressure during the gas injection process. When the gas pressure in the pipeline rises or falls abnormally, it cannot respond in time, which can easily lead to safety accidents such as gas leakage and pipeline damage, posing significant safety hazards.

[0004] Therefore, developing a gas injection displacement extraction gas pipeline connection device that is compact in structure, easy to operate, highly integrated in function, and safe and reliable has become an urgent technical problem to be solved in the field of coal mine gas control. Utility Model Content

[0005] This utility model provides a pipeline connection device for gas injection displacement extraction of methane, which adopts the following technical solution: a cubic connection device with four sides and bottom open; the right interface of the connection device is connected to the methane extraction pipeline, the left interface is connected to the gas injection pipeline, the bottom interface is connected to the drainage pipeline, and the front and rear interfaces are connected to the extraction pipeline; the methane extraction pipeline is used to extract methane, the gas injection pipeline is used to inject displacement gas, the drainage pipeline is used to drain accumulated water, and the extraction pipeline is used to extract the displacement methane gas to the subsequent treatment system.

[0006] Furthermore, the gas injection line is equipped with a first safety valve and a second safety valve, and a pressure gauge is provided between the first safety valve and the second safety valve. The pressure gauge is used to monitor the gas pressure inside the gas injection line.

[0007] Furthermore, the extraction pipeline is equipped with an extraction control valve, and the drainage pipeline is equipped with a drainage control valve. The extraction control valve and the drainage control valve can be closed during the gas injection process.

[0008] Furthermore, the second safety valve is located between the connecting device and the pressure gauge, and the second safety valve can be closed during the evacuation process to protect the pressure gauge.

[0009] Furthermore, the connecting device is a one-piece cast steel structure, and the internal flow channels of the connecting device are smoothly transitioned.

[0010] Furthermore, the connecting device is a detachable and movable structure, and multiple connecting devices can be interconnected through extraction pipelines to form a gas injection and displacement extraction gas system.

[0011] In summary, this utility model has the following beneficial technical effects: 1. This utility model integrates multiple functions such as gas injection, extraction, and drainage through a connecting device, with a compact structure and simple operation; the gas injection pipeline is equipped with dual safety valves and a pressure gauge, which can realize continuous or intermittent gas injection and monitor the gas pressure in real time; the extraction pipeline and the drainage pipeline are equipped with safety valves, which can be closed during the gas injection process to improve the system's sealing and safety; the second safety valve can be closed during gas extraction to effectively protect the pressure gauge and extend the service life of the equipment. Attached Figure Description

[0012] Figure 1 This is a structural front view of the present invention; Figure 2 This is a top view of the structure of this utility model.

[0013] Explanation of reference numerals in the attached drawings: 1. Connecting device; 2. Gas extraction pipeline; 3. Gas injection pipeline; 4. Drainage pipeline; 5. Gas extraction pipeline; 6. First safety valve; 7. Second safety valve; 8. Pressure gauge; 9. Gas extraction control valve; 10. Drainage control valve. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to the accompanying drawings.

[0015] like Figure 1-2A specific embodiment of a pipeline connection device for gas injection displacement extraction of methane is shown, comprising a cubic connection device 1 with four sides and bottom open. The right interface of the connection device 1 is connected to the methane extraction pipeline 2, the left interface is connected to the gas injection pipeline 3, the bottom interface is connected to the drainage pipeline 4, and the front and rear interfaces are connected to the extraction pipeline 5. The methane extraction pipeline 2 is used to extract methane, the gas injection pipeline 3 is used to inject displacement gas, the drainage pipeline 4 is used to drain accumulated water, and the extraction pipeline 5 is used to extract the displaced methane gas to the subsequent treatment system.

[0016] Specifically, the cube connection device 1 is designed as a cube structure with four open sides and bottom, serving as a core integrated component for gathering and connecting multiple functional pipelines. The device provides multiple interfaces, enabling centralized management of transmission paths for different media, thereby simplifying the overall pipeline layout. Gas extraction pipeline 2, configured to connect to the right interface of connecting device 1, primarily functions to extract gas from the coal seam into the connecting device 1, serving as the main channel during gas extraction. Gas injection pipeline 3, configured to connect to the left interface of connecting device 1, primarily functions to inject displacement gas into the coal seam to improve gas desorption efficiency, and is a key path for gas injection and displacement operations. Drainage pipeline 4, configured to connect to the lower interface of connecting device 1, primarily functions to drain accumulated water that may form in the pipeline or coal seam during gas extraction or injection, ensuring unobstructed pipeline flow and stable system operation. Gas extraction pipeline 5, configured to connect to the front and rear interfaces of connecting device 1, primarily functions to extract the displacement-treated gas from the connecting device 1 to the subsequent gas treatment system for purification or utilization.

[0017] Specifically, the right-side interface of the connecting device 1 is configured to connect to the gas extraction pipeline 2. The gas extraction pipeline 2 can be a standard industrial pipe, fixed to the right-side interface of the connecting device 1 through flange connection, threaded connection, or welding, to ensure that gas can be effectively extracted into the connecting device 1. The left-side interface of the connecting device 1 is configured to connect to the gas injection pipeline 3. The gas injection pipeline 3 can also be a standard industrial pipe, fixed to the left-side interface of the connecting device 1 through flange connection, threaded connection, or welding, to realize the injection of displacement gas. During the injection process, the flow rate and pressure of the displacement gas can be controlled by an external manual regulating valve. The lower interface of the connecting device 1 is configured to connect to the drainage pipeline 4. The drainage pipeline 4 can use gravity drainage or auxiliary pump drainage, and the discharge of accumulated water can be controlled by a simple manual valve to prevent water from accumulating inside the pipeline system. The front and rear interfaces of the connecting device 1 are configured to connect to the extraction pipeline 5. The extraction pipeline 5 can be a standard industrial pipeline and is fixed to the front and rear interfaces of the connecting device 1 by means of flange connection, threaded connection or welding, so as to extract the displaced gas from the inside of the connecting device 1 to the subsequent treatment system.

[0018] Specifically, the pipeline connection device of this application integrates gas extraction, gas injection, drainage, and gas extraction functions into a cubic connection device 1, effectively solving the problems of complex pipelines and chaotic layout in existing systems, and significantly simplifying on-site installation and maintenance. This integrated design improves the system's functional concentration and ease of operation, and reduces equipment investment costs. Simultaneously, through the clear connection and functional division of each pipeline, the coordinated operation of gas extraction and gas injection displacement processes is achieved, improving the continuity and efficiency of gas extraction, and providing a compact and stable solution for coal mine gas control.

[0019] In other preferred embodiments, this application further proposes, based on the above technical solution, that: a first safety valve 6 and a second safety valve 7 are provided on the gas injection pipeline 3, and a pressure gauge 8 is provided between the first safety valve 6 and the second safety valve 7, the pressure gauge 8 being used to monitor the internal gas pressure of the gas injection pipeline 3.

[0020] Specifically, the first safety valve 6 and the second safety valve 7 both serve as pipeline safety protection devices. Their function is to automatically open and release pressure when the internal pressure of the gas injection pipeline 3 exceeds the preset safety threshold, so as to prevent the pipeline or related equipment from being damaged due to overpressure.

[0021] Specifically, pressure gauge 8 is used to monitor the internal air pressure of the air injection line 3, and its core function is to provide continuous pressure data feedback. By observing this data, operators can promptly determine whether the air injection process is stable and whether there are any abnormal fluctuations, and adjust the air injection parameters accordingly to ensure that the air injection process meets the process requirements.

[0022] Specifically, a first safety valve 6 and a second safety valve 7 are installed on the gas injection line 3, with a pressure gauge 8 positioned between them. This effectively solves the problem of lacking effective pressure monitoring and safety protection mechanisms during the gas injection process. Specifically, the dual safety valves provide redundant safety protection for the gas injection line 3. When the internal pressure of the line rises abnormally, either safety valve can open in time to release pressure, effectively preventing safety accidents such as line rupture and gas leakage caused by overpressure, significantly improving system safety. Simultaneously, placing the pressure gauge 8 between the two safety valves ensures that it monitors gas pressure under the protection of the safety valves, avoiding direct exposure to extreme pressure environments, thus guaranteeing the accuracy and reliability of the monitoring data. The real-time monitoring function of the pressure gauge 8 allows operators to dynamically monitor the internal pressure changes of the gas injection line 3, enabling timely adjustments to the gas injection strategy based on actual conditions, ensuring the stability and efficiency of the gas injection process.

[0023] In other preferred embodiments, the air extraction pipeline 5 is provided with an air extraction control valve 9, and the drain pipeline 4 is provided with a drain control valve 10. The air extraction control valve 9 and the drain control valve 10 can be closed during the air injection process.

[0024] Specifically, during the gas injection displacement extraction process, by setting an extraction control valve 9 on the extraction pipeline 5 and a drainage control valve 10 on the drainage pipeline 4, and enabling them to close during the gas injection process, the problem of interference between the gas injection and drainage operations and the displacement process is effectively solved.

[0025] Specifically, when the gas injection pipeline 3 injects displacement gas into the coal seam, closing the extraction control valve 9 can suspend the gas extraction operation, preventing the displacement gas from being diverted by the extraction pipeline 5 before it has fully acted on the coal seam gas. This ensures that the displacement gas can more concentratedly and fully contact and replace the adsorbed gas inside the coal seam. At the same time, closing the drainage control valve 10 can prevent the water accumulated in the coal seam from being disturbed or discharged by the airflow during the gas injection process, avoiding the water flow interfering with the effective distribution and stability of the displacement gas, and ensuring that the flow path of the displacement gas in the coal seam is not affected.

[0026] In other preferred embodiments, a second safety valve 7 is located between the connecting device 1 and the pressure gauge 8, and the second safety valve 7 can be closed during the evacuation process to protect the pressure gauge 8.

[0027] Specifically, by placing the second safety valve 7 between the connecting device 1 and the pressure gauge 8, and closing the second safety valve 7 during the gas extraction process, the pressure gauge 8 can be effectively isolated from the pressure fluctuation area in the gas extraction pipeline 2.

[0028] In other preferred embodiments, the connecting device 1 is a one-piece cast steel structure, and the internal flow channels of the connecting device 1 are smoothly transitioned.

[0029] Specifically, the connecting device 1 is designed as a one-piece cast steel structure, which significantly enhances its overall mechanical strength and sealing performance, effectively avoiding the risk of leakage that may occur under high-pressure gas injection and gas extraction environments, and ensuring the operational safety and stability of the system. At the same time, the internal flow channels of the connecting device 1 are smoothly transitioned, eliminating resistance, eddies, and dead zones generated during fluid flow, allowing for smooth transmission of displacing gas and gas, and promoting the rapid discharge of accumulated water, thereby ensuring the continuity and efficiency of gas extraction.

[0030] In other preferred embodiments, the connecting device 1 is a detachable and movable structure, and multiple connecting devices 1 can be interconnected through the air extraction pipeline 5 to form a gas injection displacement extraction system.

[0031] Specifically, the detachable and movable structure design of the connecting device 1 allows the device to be easily disassembled and repositioned, facilitating on-site adjustments to the layout based on changes in coal seam geology or extraction needs, thereby reducing the complexity of installation and maintenance. Simultaneously, the feature that multiple connecting devices 1 can be interconnected via the extraction pipeline 5, using the extraction pipeline 5 as a connection medium, enables modular combination of multiple devices, forming a scalable system capable of adapting to different gas extraction volumes.

[0032] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A pipeline connection device for gas injection displacement extraction of gas, characterized in that, The device includes a cubic connecting device (1) with four sides and bottom open. The right side interface of the connecting device (1) is connected to the gas extraction pipeline (2), the left side interface is connected to the gas injection pipeline (3), the bottom interface is connected to the drainage pipeline (4), and the front and rear side interfaces are connected to the gas extraction pipeline (5). The gas extraction pipeline (2) is used to extract gas, the gas injection pipeline (3) is used to inject displacement gas, the drainage pipeline (4) is used to discharge accumulated water, and the gas extraction pipeline (5) is used to extract the displacement gas to the subsequent treatment system.

2. The pipeline connection device for gas injection displacement extraction of gas according to claim 1, characterized in that, The gas injection pipeline (3) is provided with a first safety valve (6) and a second safety valve (7). A pressure gauge (8) is provided between the first safety valve (6) and the second safety valve (7). The pressure gauge (8) is used to monitor the gas pressure inside the gas injection pipeline (3).

3. A pipeline connection device for gas injection displacement extraction of gas according to claim 1, characterized in that, The air extraction pipeline (5) is equipped with an air extraction control valve (9), and the drain pipeline (4) is equipped with a drain control valve (10). The air extraction control valve (9) and the drain control valve (10) can be closed during the air injection process.

4. A pipeline connection device for gas injection displacement extraction of gas according to claim 2, characterized in that, The second safety valve (7) is located between the connecting device (1) and the pressure gauge (8). The second safety valve (7) can be closed during the evacuation process to protect the pressure gauge (8).

5. A pipeline connection device for gas injection displacement extraction of gas according to claim 1, characterized in that, The connecting device (1) is a one-piece cast steel structure, and the internal flow channel of the connecting device (1) is smoothly transitioned.

6. A pipeline connection device for gas injection displacement extraction of gas according to claim 1, characterized in that, The connecting device (1) is a detachable and movable structure. Multiple connecting devices (1) can be connected to each other through the gas extraction pipeline (5) to form a gas injection and displacement extraction gas system.

Images