Coal mine gas extraction pipeline water drainer

Abstract

The utility model belongs to the technical field of gas extraction pipeline water drain, specifically is a kind of coal mine gas extraction pipeline water drain. Include: extraction pipeline, the extraction pipeline is horizontally arranged, and the opening is set in extraction pipeline bottom;Water drain main part, the water drain main part is connected in extraction pipeline bottom, and is communicated with opening;The top of water drain main part is equipped with the water inlet that is communicated with extraction pipeline, bottom is equipped with drain, the inside of water drain main part is equipped with check valve for controlling water accumulation discharge;The check valve includes valve seat and the ball float for sealing this valve seat, ball float is arranged on limit rod, limit rod is provided with return spring, and return spring supports ball float.The utility model effectively solves the problem of small volume and easy water accumulation caused by the height restriction of traditional vertical water drain.

Description

Technical Field

[0001] This utility model belongs to the technical field of water drainers for gas extraction pipelines, specifically a water drainer for coal mine gas extraction pipelines. Background Technology

[0002] In coal mine gas drainage operations, the installation height of gas drainage pipelines should generally not be too high. This is due to several considerations; excessively high installation not only increases installation difficulty and cost but also causes numerous inconveniences for later maintenance and may even lead to safety risks due to pipeline stability issues. Currently, most water drainers on the market are vertical cylindrical types. This traditional design is limited by the condition that drainage pipelines should not be installed too high, resulting in a small water drainer volume. Furthermore, the area connected to the pipeline is also small, meaning that when the gas flow velocity in the drainage pipe is high but the water pressure is low, not all accumulated water can be drained. This undrained water occupies pipeline space, thereby increasing pipeline resistance and affecting gas drainage efficiency and safety. In addition, in areas with a gentle slope where water drainage is needed, the gas flow velocity makes it difficult to drain the accumulated water, further highlighting the limitations of traditional water drainers.

[0003] During coal mine gas drainage, a large amount of condensate accumulates in the drainage pipeline. If this water is not drained in time, it will occupy pipeline space, increase gas flow resistance, severely reduce gas drainage efficiency, and even cause safety hazards. Currently, vertical cylindrical drainers are commonly used for drainage. However, due to limitations in underground working space and the inability to install pipelines too high, the volume of these drainers and their connection area with the pipeline are relatively small. In actual operation, when the gas velocity is high and the water pressure is insufficient, the accumulated water is difficult to completely drain; especially in areas with gentle pipeline slopes, water is more likely to stagnate. This limitation leads to incomplete drainage, a reduced effective flow cross-section in the pipeline, increased resistance, and ultimately affects the overall performance and safety of the drainage system. Summary of the Invention

[0004] To solve the above problems, this utility model provides a water drainer for coal mine gas extraction pipelines.

[0005] This utility model adopts the following technical solution: a water drainer for a coal mine gas extraction pipeline, comprising:

[0006] The extraction and discharge pipeline is horizontally arranged and has an opening at the bottom.

[0007] The main body of the water drainer is connected to the bottom of the drain pipe and communicates with the opening;

[0008] The top of the main body of the water drainer is provided with an inlet that is connected to the pumping pipe, and the bottom is provided with a drain outlet. The interior of the main body of the water drainer is provided with a check valve for controlling the discharge of accumulated water.

[0009] The check valve includes a valve seat and a float for sealing the valve seat. The float is mounted on a limit rod, and a return spring is mounted on the limit rod to support the float.

[0010] In some embodiments, the drain outlet is located on one side of the bottom of the drain body.

[0011] In some embodiments, an electric or pneumatic actuator is further included, which is electrically connected to a level sensor for controlling its start and stop. The level sensor is disposed within the body of the drainer and is used to detect the water level.

[0012] When the liquid level reaches a high level, the actuator opens to open the drain outlet for drainage; when the liquid level drops to a low level, the actuator closes to seal the drain outlet.

[0013] In some embodiments, the main body of the water dispenser is provided with a transparent observation window and a pressure gauge interface.

[0014] In some embodiments, a pressure relief hole is provided at the bottom of the water dispenser body.

[0015] In some embodiments, the extraction and discharge pipelines are fixedly connected to the main body of the water dispenser by welding to form a parallel pipeline structure.

[0016] In some embodiments, the cross-section of the water dispenser body is rectangular or elliptical.

[0017] In some embodiments, the main body of the water dispenser is made of corrosion-resistant metal material and the surface is treated with rust prevention.

[0018] In some embodiments, the valve seat has an annular structure, and when the float is in the upper position, the float blocks the valve seat.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] This utility model provides a coal mine gas drainage pipeline drainer. By welding the drainage pipeline to the drainer body, which has a rectangular or elliptical cross-section, to form a parallel pipeline structure, it significantly increases the water capacity and the connection area with the pipeline, effectively solving the problems of small volume and easy water accumulation caused by the limited installation height of traditional vertical drainers. Its core lies in the use of a check valve mechanism consisting of a float, limit rod, and return spring, combined with a drain outlet on one side of the bottom. This allows for automatic and thorough drainage of accumulated water under negative pressure in the system, while reliably sealing to prevent gas leakage, ensuring the stability and safety of the drainage system. To further improve automation and reliability, the device can also be equipped with an electric / pneumatic actuator controlled by a liquid level sensor to achieve precise automatic opening and closing of the drainage system. In addition, a transparent observation window and pressure gauge interface facilitate real-time monitoring of the internal water level and pressure, a bottom pressure relief hole balances pressure to ensure operational safety, and corrosion-resistant metal materials and surface rust-proof treatment comprehensively enhance the long-term durability of the equipment underground, forming an efficient, reliable, and easy-to-maintain drainage solution. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the valve seat structure;

[0023] Figure 3 This is a schematic diagram of a check valve.

[0024] 1-Pumping / draining pipeline, 2-Water drainer body, 3-Check valve, 4-Valve seat, 5-Actuator, 6-Pressure relief hole, 7-Level sensor, 8-Pressure gauge interface, 9-Transparent observation window, 31-Return spring, 32-Limit rod, 33-Float ball. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] like Figure 1-3As shown, a coal mine gas extraction pipeline water drainer includes: an extraction pipeline 1, which is horizontally arranged and has an opening at its bottom; a drainer body 2, which is connected to the bottom of the extraction pipeline 1 and communicates with the opening; the top of the drainer body 2 has a water inlet communicating with the extraction pipeline 1, and the bottom has a water outlet; the interior of the drainer body 2 is provided with a check valve 3 for controlling the discharge of accumulated water; the check valve 3 includes a valve seat 4 and a float 33 for sealing the valve seat 3; the float 33 is mounted on a limiting rod 32, and a return spring 32 is mounted on the limiting rod 32 to support the float 33. The valve seat 4 has a circular structure; when the float 33 is in the upper position, the float 33 blocks the valve seat 4.

[0027] Specifically, the extraction / discharge pipeline 1 is laid horizontally, with a circular opening at its bottom. The main body 2 of the drain device is made of corrosion-resistant stainless steel, and its outer surface is treated with powder coating for rust prevention. The cross-section of the main body 2 is rectangular or elliptical. The top of the main body 2 is fixedly connected to the bottom opening of the extraction / discharge pipeline 1 by welding, so that the two are internally connected, forming a parallel pipeline structure. This structure ensures that the water accumulated in the extraction / discharge pipeline 1 can flow smoothly into the drain device, while not affecting the normal transportation of gas.

[0028] The top of the main body 2 of the drainer is provided with an inlet that connects to the pumping pipe 1, and the bottom side is provided with a drain outlet. Inside the main body 2 of the drainer, a check valve 3 is provided directly opposite the inlet.

[0029] The check valve 3 includes a valve seat 4, a limiting rod 32, a float 33, and a return spring 31. The valve seat 4 is a ring-shaped structure fixedly installed on the inner wall of the drain body 2, surrounding the inlet. The limiting rod 32 is vertically positioned at the central axis of the valve seat 4, and its upper and lower ends are fixed by brackets. The float 33 is made of a hollow metal sphere with a density less than water, and has a through hole, allowing it to slide on the limiting rod 32. A return spring 31 is also fitted on the limiting rod 32, with its lower end supported by a retaining ring and its upper end supporting the float 33, providing it with a downward preload.

[0030] Its working principle is as follows:

[0031] Water accumulation stage: When the gas in the drainage pipe 1 condenses to form water, the water flows into the main body 2 of the drain device through the inlet under the action of gravity. In the initial state, the water level is low, and the float 33 is located at the lower part of the limit rod 32 under its own weight and the preload of the return spring 31, and is disengaged from the valve seat 4. At this time, the drain outlet opens, and a small amount of water can flow out on its own.

[0032] Closure Phase: As water accumulates, the water level inside the main body 2 of the drain device gradually rises. The float 33, buoyed by the water, begins to rise along the limit rod 32. When the water level reaches a certain height, the float 33 completely floats up, tightly sealing the annular valve seat 4, thereby cutting off the passage between the main body 2 of the drain device and the extraction pipe 1, preventing gas from escaping from the drain outlet.

[0033] Drainage stage: After the drain outlet is opened, the water accumulated in the main body 2 of the drainer is discharged under the action of gravity. The drop in water level causes the buoyancy of the float 33 to decrease, and it moves down under the action of the return spring 31 and its own weight, and disengages from the valve seat 4 again. The water inlet channel is opened, and the accumulated water can continue to flow in, starting the next working cycle.

[0034] It also includes an electric or pneumatic actuator 5, which is electrically connected to a liquid level sensor 7 for controlling its start and stop. The liquid level sensor 7 is disposed in the main body 2 of the drainer and is used to detect the water level.

[0035] When the liquid level reaches a high level, the actuator 5 is activated to open the drain outlet for drainage; when the liquid level drops to a low level, the actuator 5 is deactivated to seal the drain outlet.

[0036] When the level sensor 7 detects that the water level in the main body 2 of the drainer has reached the preset high water level, it sends a signal to the controller, which then starts the electric actuator 5 to open the valve of the drain outlet for rapid drainage.

[0037] When the level sensor 7 detects that the water level has dropped to the preset low level, it sends a signal again, and the controller controls the electric actuator 5 to close the valve and seal the drain outlet, thereby effectively preventing gas leakage.

[0038] In a specific embodiment, the main body 2 of the water drainer is equipped with a transparent observation window 9 and a pressure gauge interface 8. A transparent observation window 9 is installed on the side wall of the main body 2 for direct observation of the internal water level and the working status of the float. A pressure gauge interface 8 is also provided on the main body for installing a pressure gauge to monitor the internal pressure. Furthermore, a pressure relief hole 6 is provided at the center of the bottom of the main body 2. This hole is normally sealed with a plug, but can be opened for maintenance or emergency pressure relief to ensure operational safety.

[0039] A pressure relief hole 6 is provided at the bottom of the main body 2 of the drain device. A pressure relief valve that can be manually or automatically controlled is connected to the pressure relief hole 6, which is used to manually release the gas pressure in the main body 2 of the drain device before drainage or during maintenance.

[0040] This invention significantly increases the cross-sectional area of ​​the connection between the drainer and the pumping pipeline, which is equivalent to increasing the diameter of the pumping pipe and the volume of the drainer. When the accumulated water reaches a certain level, it can be automatically released under the action of gravity. For some of the accumulated water that cannot be completely released due to the negative pressure in the pipeline, the parallel connection of the drainers increases the pipe diameter, thus not adding extra resistance to the pumping pipeline.

[0041] This invention is not limited by terrain, and can effectively achieve water drainage regardless of whether the slope is steep or gentle. Secondly, it does not increase pipeline resistance, ensuring smooth gas extraction. Furthermore, the manufacturing process is simple and the cost is low, facilitating large-scale application. This innovative design provides more efficient, economical, and reliable technical support for coal mine gas extraction, improving the operational level and safety assurance capabilities of the entire coal mine gas extraction industry.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A water drain device for a coal mine gas extraction pipeline, characterized in that: include: The extraction pipeline (1) is horizontally arranged and has an opening at the bottom. The main body of the water dispenser (2) is connected to the bottom of the pumping pipe (1) and communicates with the opening; The top of the water discharger body (2) is provided with an inlet that is connected to the pumping pipe (1), and the bottom is provided with a drain outlet. The inside of the water discharger body (2) is provided with a check valve (3) for controlling the discharge of accumulated water. The check valve (3) includes a valve seat (4) and a float (33) for sealing the valve seat (4). The float (33) is mounted on a limiting rod (32), and a return spring (31) is mounted on the limiting rod (32). The return spring (31) supports the float (33).

2. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The drain outlet is located on one side of the bottom of the main body (2) of the water dispenser.

3. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: It also includes an electric or pneumatic actuator (5), which is electrically connected to a liquid level sensor (7) for controlling its start and stop. The liquid level sensor (7) is located inside the main body (2) of the drainer and is used to detect the water level. When the liquid level reaches a high level, the actuator (5) is turned on to open the drain outlet for drainage; when the liquid level drops to a low level, the actuator (5) is turned off to seal the drain outlet.

4. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The main body (2) of the water dispenser is provided with a transparent observation window (9) and a pressure gauge interface (8).

5. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The water discharge device body (2) is provided with a pressure relief hole (6) at the bottom.

6. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The extraction pipeline (1) is fixedly connected to the main body (2) of the water dispenser by welding to form a parallel pipeline structure.

7. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The cross-section of the main body (2) of the water dispenser is rectangular or elliptical.

8. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The main body (2) of the water dispenser is made of corrosion-resistant metal material and the surface is treated with anti-rust treatment.

9. The water drainer for coal mine gas extraction pipelines according to claim 1, characterized in that: The valve seat (4) has a circular structure. When the float (33) is in the upper position, the float (33) blocks the valve seat (4).

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