Mechanical automatic drainage device for underground coal mine gas extraction pipeline

Abstract

The utility model belongs to the technical field of coal mine underground gas extraction, and particularly discloses a mechanical automatic drainage device for a coal mine underground gas extraction pipeline, which automatically collects water, coal cinder and other mixtures in the pipeline in a negative pressure state and automatically communicates with the atmosphere when accumulated water reaches a certain amount. The air pressure in the water collecting cylinder is changed from a negative pressure state to a positive pressure state, accumulated water washes coal slag under the action of self gravity and is automatically discharged, the degree of dependence on manpower is reduced, and the water and slag discharging efficiency is improved. According to the magnetic mechanical automatic control assembly, the safety is guaranteed, meanwhile, the guide rod is assisted to be lifted through magnetic force, and the situation that in the drainage process, due to insufficient buoyancy of a floater, the drainage device is difficult to communicate with the atmosphere is avoided. Due to the existence of the second water and slag discharging opening, large coal slag can be prevented from being accumulated to block the first water and slag discharging opening used for automatic discharging, remedial measures of manual discharging can be provided when the automatic water and slag discharging function fails, and therefore pipeline blocking is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of underground gas extraction technology in coal mines, and relates to a mechanical automatic drainage device for underground gas extraction pipelines in coal mines. Background Technology

[0002] Coal seam gas pre-drainage, a common method for effectively reducing coal seam gas content, involves connecting the coal seam and a borehole in the gas accumulation area via a gas drainage pipeline, and then using drainage equipment to extract the gas. However, during the drainage process, liquid water condensed from water vapor within the gas drainage pipeline and borehole flows into the pipeline along with coal slag and other materials, accumulating at the lowest point and easily causing blockages, thus affecting the gas drainage effect. Currently, the drainage devices commonly used in underground coal mine gas drainage pipelines mainly rely on manual water release, but manual water release is inefficient and may also result in untimely and incomplete drainage.

[0003] While some existing drainage devices utilize electromagnetically controlled valves for automatic water discharge, the use of electronic components poses safety hazards due to the flammable and explosive nature of methane. Furthermore, some existing drainage systems employ negative pressure automatic drainage, but these often rely solely on buoyancy control. In practice, the float's own weight can cause it to fail to open the atmospheric connection valve, preventing the internal environment from transitioning from negative to positive pressure, ultimately leading to the failure of the automatic drainage and slag removal function. Moreover, most existing automatic drainage devices only consider one drainage and slag removal port, lacking remedial measures for sludge accumulation causing blockages. Additionally, existing automatic drainage devices lack water vapor condensation devices, causing undried water vapor to be drawn out with the methane gas and condense again within the pipes, reducing water collection and drainage efficiency.

[0004] Therefore, there is an urgent need to propose a new type of automatic drainage device for underground gas extraction pipelines in coal mines to solve the aforementioned technical problems in the existing technology. Utility Model Content

[0005] The purpose of this invention is to propose a mechanical automatic drainage device for underground gas extraction pipelines in coal mines, in order to solve the problem of mud and water clogging the pipelines in underground gas extraction pipelines. Under negative pressure, it automatically collects the mixture of water and coal slag in the pipeline, and then ensures atmospheric conduction under the combined action of buoyancy and magnetism, thereby completing the automatic drainage.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A mechanical automatic drainage device for underground gas extraction pipelines in coal mines includes an inlet pipe, a water collection cylinder, a drain pipe, and an automatic control component.

[0008] The water inlet pipe is located at the top of the water collection cylinder. The end of the water inlet pipe near the inner cavity of the water collection cylinder is equipped with an inner baffle that can be opened and closed in one direction. The water inlet pipe is connected to the extraction pipeline branch pipe and the manifold pipe. A water vapor condensation device is installed inside the manifold pipe.

[0009] The drain pipe is located at the bottom of the water collection cylinder. The drain pipe is equipped with a first drain and slag discharge port for automatic discharge, and an outer baffle that can be opened and closed in one direction is provided at the first drain and slag discharge port. The drain pipe is also equipped with a second drain and slag discharge port for manual discharge, and a gate is provided at the second drain and slag discharge port.

[0010] The automatic control components include a housing, guide rods, a moving piston, and a float;

[0011] The shell is located on top of the water collection cylinder, and an upper magnet is provided on the inner side of the top of the shell; the side of the shell is provided with an atmospheric connection port and a negative pressure port, the atmospheric connection port is connected to the outside atmosphere, and the negative pressure port is connected to the manifold.

[0012] The upper part of the guide rod extends into the housing, and a lower magnet is provided on the upper part of the guide rod. The lower magnet slides in conjunction with the inner side of the housing to open or close the atmospheric vent.

[0013] The moving piston is mounted on the guide rod and has a vent hole that communicates with the inner cavity of the water collecting cylinder. The moving piston slides against the inner side of the housing to allow the negative pressure vent to be opened or closed.

[0014] The lower part of the guide rod is provided with an upper limit component and a lower limit component for the float. The float is located between the upper limit component and the lower limit component, and the float slides with the guide rod.

[0015] Preferably, an upper piston limiter and a lower piston limiter are provided on the inner side of the housing;

[0016] The moving piston is located between the upper limit stop and the lower limit stop, and the lower magnet is located above the upper limit stop.

[0017] Preferably, the first drainage and slag discharge port is located at the outer end of the drainage pipe;

[0018] The second drainage and slag discharge port is located in the middle of the drainage pipe. A manual slag discharge chamber is provided between the second drainage and slag discharge port and the drainage pipe. The position of the manual slag discharge chamber is lower than that of the first drainage and slag discharge port.

[0019] Preferably, a filter screen inclined toward the manual slag discharge chamber is provided on the inner side of the first drainage and slag discharge port.

[0020] Preferably, the inner side of the water collection cylinder has a sloping bottom that slopes towards the drain pipe.

[0021] Preferably, the bottom outer side of the water collection cylinder is equipped with a support.

[0022] Preferably, a filter nozzle is provided at the atmospheric vent.

[0023] Preferably, the top and sides of the upper magnet are covered with an upper rubber cushioning pad;

[0024] The bottom and sides of the lower magnet are covered with a lower rubber buffer pad, which slides against the inner side of the housing to allow the atmospheric vent to be opened or closed.

[0025] Preferably, the float is a hollow spherical float.

[0026] Preferably, the mechanical automatic drainage device for underground gas extraction pipelines in coal mines also includes a negative pressure connection pipe; the negative pressure air inlet is connected to the manifold through the negative pressure connection pipe.

[0027] Compared with the prior art, this utility model has the following advantages:

[0028] As described above, this utility model relates to a mechanical automatic drainage device for underground gas extraction pipelines in coal mines. Under negative pressure, it automatically collects a mixture of water and coal slag from the pipeline. When the accumulated water reaches a certain amount, it automatically connects to the atmosphere, changing the air pressure inside the collection cylinder from negative to positive. The accumulated water, under its own gravity, flushes away the coal slag and is automatically discharged. This reduces the reliance on manual labor during drainage and slag removal in underground gas extraction pipelines and improves the drainage and slag removal efficiency of the gas extraction pipeline. Furthermore, the drainage device of this utility model employs a magnetic mechanical automatic control component. While ensuring the safety of gas extraction operations, the magnetic force between the upper and lower magnets assists the guide rod in lifting, preventing insufficient buoyancy of the float during drainage, which could hinder the connection between the drainage device and the atmosphere. The presence of a second drainage and slag removal port prevents large coal slag accumulation from clogging the first drainage and slag removal port used for automatic discharge. It also provides a remedial measure for manual discharge when the automatic drainage and slag removal function fails, thus effectively preventing pipeline blockage. In addition, the drainage device of this utility model is also equipped with a water vapor condensation device, which condenses water vapor into liquid water and collects it, preventing water vapor from re-entering the gas extraction pipeline and improving the efficiency of water collection and drainage. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0030] Figure 1 This is a schematic diagram of the mechanical automatic drainage device for underground gas extraction pipelines in coal mines, as described in this utility model embodiment.

[0031] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0032] Among them, 1-inlet pipe, 11-inner baffle, 12-extraction pipeline branch pipe, 13-combination pipe, 14-water vapor condensation device, 2-water collection cylinder, 3-drainage pipe, 31-first drainage and slag discharge port, 32-second drainage and slag discharge port, 33-outer baffle, 34-gate, 35-manual slag discharge chamber, 36-filter screen;

[0033] 4-Automatic control components, 401-Housing, 402-Guide rod, 403-Motion piston, 404-Float, 405-Upper magnet, 406-Atmospheric vent, 407-Negative pressure vent, 408-Lower magnet, 409-Ventilation hole, 410-Float upper limit component, 411-Float lower limit component, 412-Piston upper limit component, 413-Piston lower limit component, 414-Filter nozzle, 415-Upper rubber buffer pad, 416-Lower rubber buffer pad, 5-Foot bracket, 6-Negative pressure connection pipe. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0040] Example:

[0041] like Figures 1 to 2 As shown, the mechanical automatic drainage device for underground gas extraction pipelines in coal mines in this embodiment includes an inlet pipe 1, a water collection cylinder 2, a drainage pipe 3, and an automatic control component 4.

[0042] The inlet pipe 1 is located at the top of the water collection cylinder 2, and an inner baffle 11 that can be opened and closed in one direction is provided at the end of the inlet pipe 1 near the inner cavity of the water collection cylinder 2. The inlet pipe 1 is connected to the extraction pipeline branch pipe 12 and the manifold pipe 13. A water vapor condensation device 14 is provided in the manifold pipe 13. The water vapor condensation device 14 can condense the water vapor in the gas into liquid water, preventing it from re-entering the gas extraction pipeline, thereby improving the water collection and drainage efficiency.

[0043] Specifically, during the water collection process, the gas in the manifold 13 is liquefied by the water vapor condenser 14 as it flows into the branch pipe 12 of the extraction pipeline. The liquid water, along with coal slag and other materials, flows into the inlet pipe 1. Since the water collection cylinder 2 is under negative pressure at this time, the inner baffle 11 opens under the gravity of the mixture of water and coal slag in the inlet pipe 1, connecting the inlet pipe 1 with the inner cavity of the water collection cylinder 2. The collected mixture of water and coal slag is temporarily stored in the inner cavity of the water collection cylinder 2. When the accumulated water reaches a certain amount, the drainage device automatically connects to the atmosphere. During the drainage process, the water collection cylinder 2 is under positive pressure. At this time, the inner baffle 11 automatically closes under the action of air pressure, disconnecting the inlet pipe 1 from the inner cavity of the water collection cylinder 2.

[0044] The drain pipe 3 is located at the lower part of the water collection cylinder 2. The drain pipe 3 is equipped with a first drain and slag discharge port 31 for automatic discharge, and an outer baffle 33 that can be opened and closed in one direction is provided at the first drain and slag discharge port 31. The drain pipe 3 is also equipped with a second drain and slag discharge port 32 for manual discharge, and a gate 34 is provided at the second drain and slag discharge port 32. The addition of the second drain and slag discharge port 32 can prevent the accumulation of larger coal slag particles and blockage.

[0045] Specifically, in this embodiment, the first drainage and slag discharge port 31 is located at the outer end of the drainage pipe 3, the second drainage and slag discharge port 32 is located in the middle of the drainage pipe 3, a manual slag discharge chamber 35 is provided between the second drainage and slag discharge port 32 and the drainage pipe 3, the position of the manual slag discharge chamber 35 is lower than the first drainage and slag discharge port 31, and a filter screen 36 inclined towards the manual slag discharge chamber 35 is provided on the inner side of the first drainage and slag discharge port 31.

[0046] In this embodiment, during automatic drainage, the air pressure inside the water collection cylinder 2 is positive. The outer baffle 33 opens automatically under water pressure, allowing small coal slag particles to be discharged from the first drainage outlet 31. Larger coal slag particles are filtered by the filter screen 36 and deposited in the manual slag discharge chamber 35 along the inclined direction of the filter screen 36. Since the manual slag discharge chamber 35 is lower than the first drainage outlet 31, it does not affect normal automatic drainage and slag discharge. Larger coal slag particles can be cleaned by periodically manually discharging them through the gate 34. The second drainage outlet 32 ​​can also serve as a remedial measure when automatic drainage and slag discharge fails. For example, if the first drainage outlet 31 cannot open automatically, the accumulated coal slag and water can be manually discharged through the second drainage outlet 32 ​​to prevent pipe blockage after automatic drainage failure.

[0047] The automatic control component 4 includes a housing 401, a guide rod 402, a moving piston 403, and a float 404. The magnetic mechanical automatic control component 4 can assist the automatic drainage function. Under the combined action of buoyancy and magnetic force, it ensures that the drainage device is connected to the atmosphere to complete the automatic drainage.

[0048] The housing 401 is located on top of the water collecting cylinder 2. An upper magnet 405 is mounted on the inner surface of the top of the housing 401. In this embodiment, the top and sides of the upper magnet 405 are covered with an upper rubber buffer pad 415. The upper magnet 405 assists in lifting the guide rod 402 and prevents the float 404 from accidentally falling. An atmospheric connection port 406 and a negative pressure port 407 are provided on the side of the housing 401. The atmospheric connection port 406 communicates with the external atmosphere, and the negative pressure port 407 communicates with the manifold 13. A piston upper limit stop 412 and a piston upper limit stop 413 are mounted on the inner surface of the housing 401.

[0049] In this embodiment, the mechanical automatic drainage device for underground gas extraction pipelines in coal mines also includes a negative pressure connecting pipe 6, and a negative pressure air port 407 is connected to the manifold 13 through the negative pressure connecting pipe 6. The addition of the negative pressure connecting pipe 6 between the automatic control component 4 and the manifold 13, and the installation of a negative pressure pipe connector at the negative pressure air port 407 to connect to the negative pressure connecting pipe 6, ensures a negative pressure environment inside the water collection cylinder 2 during water collection, preventing malfunctions in the inlet pipe 1.

[0050] In this embodiment, an air filter 414 is also provided at the atmospheric connection 406. During the drainage process, external gas enters the inner cavity of the water collection cylinder 2 through the atmospheric connection 406. Installing the filter 414 at the atmospheric connection 406 can prevent coal dust from being sucked into the water collection cylinder 2, thus preventing an increase in the amount of coal slag.

[0051] The upper part of the guide rod 402 extends into the housing 401. A lower magnet 408 is provided on the upper part of the guide rod 402. In this embodiment, the lower magnet 408 is located above the piston upper limit member 412. The lower magnet 408 slides with the inner side of the housing 401 to open or close the atmospheric connection port 406. In this embodiment, the bottom and sides of the lower magnet 408 are covered with a lower rubber buffer pad 416. The guide rod 402 is connected to the lower part of the lower rubber buffer pad 416. The lower rubber buffer pad 416 slides with the inner side of the housing 401 to open or close the atmospheric connection port 406.

[0052] The moving piston 403 is mounted on the guide rod 402. In this embodiment, the moving piston 403 is located between the piston upper limit member 412 and the piston upper limit member 413. The moving piston 403 is provided with a vent hole 409 that communicates with the inner cavity of the water collecting cylinder 2. The moving piston 403 is slidably engaged with the inner side of the housing 401 to allow the negative pressure vent 407 to be opened or closed.

[0053] When the guide rod 402 moves the piston 403 to the upper limit position 412, the upper magnet 405 and the lower magnet 408 attract each other, creating a gap between the guide rod 402 and the housing 401, allowing the atmospheric connection port 406 to connect with the vent hole 409. Simultaneously, the piston 403 blocks the negative pressure vent 407, thus creating a positive pressure state inside the water collecting cylinder 2. When the upper magnet 405 and the lower magnet 408 separate, the guide rod 402 moves the piston 403 to the upper limit position 413. At this time, a gap exists between the housing 401 above the piston 403 and the guide rod 402, allowing the negative pressure vent 407 to connect with the vent hole 409. Simultaneously, the lower magnet 408, driven by the guide rod 402, moves to below the atmospheric connection port 406, disconnecting the atmospheric connection port 406 from the vent hole 409, thus creating a negative pressure state inside the water collecting cylinder 2.

[0054] The lower part of the guide rod 402 is provided with an upper float stop 410 and a lower float stop 411, and the float 404 is disposed between the upper float stop 410 and the lower float stop 411. In this embodiment, the float 404 is a hollow spherical float 404 to reduce its own weight and facilitate buoyancy. A cavity is provided at the central axis of the float 404 to fit into the guide rod 402, and the float 404 and the guide rod 402 are in sliding fit. Specifically, after the float 404 rises to the upper float stop 410 under the action of buoyancy, the float 404 continues to rise, which will drive the guide rod 402 to move upward; after the float 404 descends to the lower float stop 411 under its own weight, the float 404 continues to descend, which will drive the guide rod 402 to move downward.

[0055] In this embodiment, the upper limit component 410 of the float, the lower limit component 411 of the float, the upper limit component 412 of the piston, and the lower limit component 413 of the piston are preferably limit baffles.

[0056] In addition, to prevent sludge from accumulating at the bottom, the inner side of the water collection cylinder 2 is designed with a sloping bottom that slopes towards the drain pipe 3. Setting the inner bottom of the water collection cylinder 2 as a slope facilitates the conversion of the gravitational potential energy of water into kinetic energy, thereby increasing the flow rate of drainage and slag discharge, facilitating the flow and collection of coal slag, and using the drainage process to discharge sludge along with the accumulated water, preventing coal slag from sticking and accumulating at the bottom of the water collection cylinder 2.

[0057] In addition, in this embodiment, a foot bracket 5 for fixing the device is also provided on the bottom outer side of the water collection cylinder 2.

[0058] The mechanical automatic drainage device for underground gas extraction pipelines in this embodiment is used as follows:

[0059] In actual gas extraction work, the manifold 13 after borehole grid connection and the branch pipe 12 of the extraction pipeline are connected to the underground gas extraction pipeline of the coal mine using a mechanical drainage device, and the drainage device is placed on a flat ground below the extraction pipeline.

[0060] During the water collection process, when the lower rubber buffer pad 416 and the moving piston 403 are in the lower limit position, the inner cavity of the water collection cylinder 2 is connected to the negative pressure air port 407, and the inner cavity of the water collection cylinder 2 is connected to the manifold 13 through the negative pressure connecting pipe 6. The atmospheric connection port 406 is sealed by the lower rubber buffer pad 416 and is not connected to the inner cavity of the water collection cylinder 2, so that the pressure inside the water collection cylinder 2 is balanced with the pressure of the gas extraction pipeline, and the water collection cylinder 2 is in a negative pressure state. The water vapor in the gas in the manifold 13 is liquefied by the water vapor condensation device 14 during the process of flowing into the branch pipe 12 of the extraction pipeline and flows into the water inlet pipe 1. Under the gravity of the mixture of water and coal slag, the inner baffle 11 is opened and then it is collected in the inner cavity of the water collection cylinder 2. During the water collection process, due to the inclination of the bottom inside the water collection cylinder 2, the mud and sludge will temporarily accumulate in the drain pipe 3 at the bottom of the water collection cylinder 2. Since the pressure inside the water collection cylinder 2 is still in a negative pressure state, the water pressure cannot open the outer baffle 33, thus achieving negative pressure water collection.

[0061] As the water volume gradually increases, the float 404 rises gradually under the action of buoyancy. When it rises to the position of the upper limit part 410 of the float, the water level continues to rise, and the float 404 will drive the guide rod 402 to move upward together. At this time, the moving piston 403 will move upward as well. When the moving piston 403 moves to the upper limit part 412 of the piston, the upper magnet 405 and the lower magnet 408 are tightly attracted together to prevent the float 404 from falling accidentally. At this time, the moving piston 403 cuts off the negative pressure air port 407, and the atmospheric connection port 406 connects with the vent 409. External air enters the inner cavity of the water collecting cylinder 2, and the pressure inside the water collecting cylinder 2 changes from a negative pressure state to a positive pressure state. Water and small coal slag particles open the outer baffle 33 under the action of gravity and are discharged from the first drainage and slag discharge port 31. Large coal slag particles will be filtered by the filter screen 36 and temporarily stored in the manual slag discharge chamber 35. The large coal slag particles are manually discharged by periodically opening the gate 34 at the manual slag discharge chamber 35.

[0062] During drainage, as the water level drops, the float 404 gradually descends. When it reaches the lower limit of the float 411, the float 404 is suspended in mid-air. Having lost its buoyancy, the float 404, under its own weight, separates the upper magnet 405 from the lower magnet 408, causing the guide rod 402, the moving piston 403, and the lower rubber buffer pad 416 to move downwards until the moving piston 403 reaches the upper limit of the piston 413. At this point, the lower rubber buffer pad 416 closes the atmospheric connection 406 again, cutting off the atmospheric connection. The negative pressure vent 407 connects to the inner cavity of the water collection cylinder 2, changing the pressure inside the water collection cylinder 2 from positive to negative, thus initiating a new round of water collection. The above description constitutes a complete water collection and drainage cycle.

[0063] This concludes the detailed description of this embodiment in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to this utility model.

[0064] This utility model discloses a mechanical automatic drainage device for underground gas extraction pipelines in coal mines. It utilizes a mechanical principle to achieve automatic drainage. The bottom inner side of the water collection cylinder 2 is inclined, which facilitates the conversion of gravitational potential energy into kinetic energy, increases water flow velocity, and promotes the flow and collection of coal slag, preventing slag from sticking and accumulating at the bottom. The magnetic mechanical automatic control component 4 assists in automatic drainage. Under the combined action of the buoyancy of the float 404 and the magnetic force between the upper magnet 405 and the lower magnet 408, it ensures conduction to the atmosphere during drainage. It can operate without electricity, avoiding electrical gas accidents, ensuring the safety of the gas extraction process, reducing the workload of underground workers, and improving the efficiency of drainage and slag removal in underground gas extraction pipelines in coal mines. The drainage device of this invention also has a water vapor condensation function. The water vapor condensation device 14 condenses water vapor in the gas into liquid water for collection. An air filter 414 is installed at the atmospheric connection port 406 to prevent coal dust from being drawn into the water collection cylinder 2, thus increasing the amount of coal slag and improving the water collection and drainage efficiency of the device. Furthermore, a negative pressure connection pipe 6 is added between the automatic control component 4 and the manifold 13 to prevent malfunction of the inlet pipe 1 during water collection and to ensure a negative pressure environment inside the water collection cylinder 2. In addition, the drainage device of this invention also adds a second manual slag discharge port 32 to prevent large coal slag from accumulating and clogging the drain outlet. This also serves as a remedial measure in case the automatic drainage and slag discharge function fails, giving the drainage device good reliability.

[0065] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A mechanical automatic drainage device for underground gas extraction pipelines in coal mines, characterized in that, Includes inlet pipe, water collection cylinder, drain pipe and automatic control components; The water inlet pipe is located at the top of the water collection cylinder. One end of the water inlet pipe near the inner cavity of the water collection cylinder is equipped with an inner baffle that can be opened and closed in one direction. The water inlet pipe is connected to the extraction pipeline branch pipe and the manifold pipe. A water vapor condensation device is installed inside the manifold pipe. The drain pipe is located at the bottom of the water collection cylinder. The drain pipe is equipped with a first drain and slag discharge port for automatic discharge, and an outer baffle that can be opened and closed in one direction is provided at the first drain and slag discharge port. The drain pipe is also equipped with a second drain and slag discharge port for manual discharge, and a gate is provided at the second drain and slag discharge port. The automatic control assembly includes a housing, a guide rod, a moving piston, and a float; The housing is located on the top of the water collection cylinder, and an upper magnet is provided on the inner side of the top of the housing; an atmospheric connection port and a negative pressure port are provided on the side of the housing, the atmospheric connection port is connected to the external atmosphere, and the negative pressure port is connected to the manifold. The upper part of the guide rod extends into the housing, and a lower magnet is provided on the upper part of the guide rod. The lower magnet slides in cooperation with the inner side of the housing to open or close the atmospheric vent. The moving piston is mounted on the guide rod and has a vent hole that communicates with the inner cavity of the water collecting cylinder. The moving piston slides against the inner side of the housing to allow the negative pressure vent to be opened or closed. The lower part of the guide rod is provided with an upper limit component and a lower limit component for the float. The float is disposed between the upper limit component and the lower limit component, and the float is slidably engaged with the guide rod.

2. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The inner side of the housing is provided with an upper piston limit component and a lower piston limit component; The moving piston is located between the upper piston limit member and the lower piston limit member, and the lower magnet is located above the upper piston limit member.

3. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The first drainage and slag discharge port is located at the outer end of the drainage pipe; The second drainage and slag discharge port is located in the middle of the drainage pipe, and a manual slag discharge chamber is provided between the second drainage and slag discharge port and the drainage pipe. The position of the manual slag discharge chamber is lower than that of the first drainage and slag discharge port.

4. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 3, characterized in that, The inner side of the first drainage and slag discharge port is provided with a filter screen that is inclined toward the manual slag discharge chamber.

5. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The inner side of the water collection cylinder has a sloping bottom that slopes towards the drain pipe.

6. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The bottom outer side of the water collection cylinder is equipped with a support frame.

7. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, A filter nozzle is installed at the atmospheric connection port.

8. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The top and sides of the upper magnet are covered with upper rubber buffer pads; The bottom and sides of the lower magnet are covered with a lower rubber buffer pad, which slides in contact with the inner side of the housing to allow the atmospheric vent to be opened or closed.

9. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The float is a hollow spherical float.

10. The mechanical automatic drainage device for underground gas extraction pipelines in coal mines according to claim 1, characterized in that, The mechanical automatic drainage device for underground gas extraction pipelines in coal mines also includes a negative pressure connection pipe. The negative pressure air inlet is connected to the manifold via a negative pressure connecting pipe.

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