Hongu-shaped mine drainage pipeline connector convenient for dredging and dredging method

Abstract

The invention discloses a red-mine drainage pipeline connector convenient to dredge for a mine and a dredging method, and relates to the technical field of underground drainage of coal mines, the red-mine drainage pipeline connector comprises a water inlet pipe and a water outlet pipe, and at least two water outlets are formed in the pipe wall of the water inlet pipe; the water outlet pipe is fixedly sleeved outside the water inlet pipe, so that an annular overflowing space is formed between the outer wall of the water inlet pipe and the inner wall of the water outlet pipe, and a connecting pipe communicated with the annular overflowing space is arranged on the side wall of the water outlet pipe. The problems that in the prior art, due to the fact that a traditional mine drainage pipeline connecting structure is single in function and lacks efficient self-cleaning capacity, blockage is prone to occurring when slag-containing water is treated, manual shutdown and disassembly are dependent in the desilting process, and efficiency is low are solved. The device has the advantages that the device is provided with a mechanical scraping and high-pressure hydraulic flushing dual self-cleaning mechanism, efficient and automatic desilting of the filtering unit is achieved, the maintenance efficiency is improved, continuous and stable operation of a drainage system is guaranteed, and the device is suitable for the coal mining environment.

Description

Technical Field

[0001] This invention relates to the field of underground drainage technology in coal mines, and more particularly to a mine drainage pipe connector and dredging method that facilitates dredging. Background Technology

[0002] In coal mining, the underground drainage system is a lifeline for ensuring safe production. Its reliability directly affects the mine's ability to effectively resist water hazards such as sudden water inrushes and surges. The underground environment in coal mines is harsh, and the water source has a complex composition, often containing high concentrations of solid particles such as coal dust and rock debris. Traditional drainage pipes are mostly made of carbon steel and rigidly connected using flanges or clamps. Over long-term operation, the inside of these pipes, especially at the joints, is prone to blockage due to particle deposition. This not only severely reduces drainage efficiency but can also lead to overflowing water tanks, causing a chain reaction of safety accidents such as water accumulation in roadways, support subsidence, and even gas accumulation.

[0003] For example, in the prior art, patent application number 201720212802.8 discloses a pipeline connection structure with a filtration function, which intercepts impurities through a built-in filter plate. However, it still requires periodic opening of the material inlet door for manual cleaning of sludge, and cannot achieve online cleaning and prevention of sludge accumulation. In addition, conventional connectors have limited functions and lack effective self-cleaning design. Once blocked, it is often necessary to stop the machine and disassemble part of the pipe section for unblocking, which is labor-intensive and poses safety hazards.

[0004] To address the above technical problems, this invention discloses a mine drainage pipe connector that facilitates dredging and a dredging method. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a mine drainage pipe connector and dredging method that facilitates dredging. This invention addresses the technical problems of traditional mine drainage pipe connection structures, which are prone to blockage when dealing with slag-containing water due to their single function and lack of efficient self-cleaning ability. Furthermore, the dredging process relies on manual disassembly and shutdown, resulting in low efficiency. This invention features a dual self-cleaning mechanism of mechanical scraping and high-pressure water flushing, enabling rapid, efficient, and automated dredging of the filter unit. This improves maintenance efficiency and ensures the continuous and stable operation of the drainage system.

[0006] The present invention is achieved through the following technical solution: The present invention discloses a mine drainage pipe connector for easy dredging, including an inlet pipe and an outlet pipe. The inlet pipe has at least two outlets on its wall. The outlet pipe is fixedly sleeved on the outside of the inlet pipe, so that an annular flow space is formed between the outer wall of the inlet pipe and the inner wall of the outlet pipe. The side wall of the outlet pipe is provided with a connecting pipe communicating with the annular flow space. Each of the water outlets is equipped with a filter screen, and the water inlet pipe is equipped with a rinsing mechanism for cleaning the filter screen.

[0007] Furthermore, the flushing mechanism includes a flushing pipe, a sealing piston, a flow port, and a driving component, wherein the flushing pipe is axially movable and inserted into the top opening of the water inlet pipe; The sealing piston is coaxially fixedly connected to one end of the flushing pipe that extends into the water inlet pipe, and forms a sliding seal with the inner wall of the water inlet pipe. In the initial position, it closes the top opening of the water inlet pipe and is located above the water outlet. The flow port is located on the wall of the flushing pipe and is configured to align and communicate with the outlet on the inlet pipe when the flushing pipe moves downward to the cleaning position. The drive component is connected to the flushing pipe and is used to drive it to move axially.

[0008] Furthermore, scrapers are fixedly installed on the bottom of the sealing piston and on the outer wall of the flushing pipe section below the flow port. The scrapers are configured to scrape the surface of the filter screen during the downward movement of the flushing pipe.

[0009] Furthermore, a sealing ring is fixedly fitted on the outer wall of the section of the flushing pipe where the flow port is opened. When the flow port is aligned with the water outlet, the sealing ring is used to seal the interface gap between the two.

[0010] Furthermore, the driving component includes a push rod and a water pressure sensor. The push rod is fixedly installed on the top of the water outlet pipe, and its telescopic shaft is fixedly connected to the top of the flushing pipe. The water pressure sensor is located in the water inlet chamber below the sealed piston and is used to monitor the water pressure there.

[0011] Furthermore, the inlet pipe and outlet pipe are connected by a detachable structure.

[0012] Furthermore, the outer circumference of the scraper is in contact with the inner wall of the inlet pipe, and multiple scrapers are arranged along the axial direction of the flushing pipe.

[0013] A dredging method for mine drainage pipe connectors that facilitate dredging includes the following steps: Step 1: Water enters from the bottom of the inlet pipe, is filtered by the filter screen, and then enters the annular flow space through the outlet. Finally, it is discharged through the connecting pipe. At the same time, the water pressure in the inlet chamber is monitored in real time. Step 2: When the water pressure exceeds the preset threshold, the push rod drives the flushing pipe to move down, causing the scraper at the bottom to scrape the surface of the filter screen and loosen the sediment; Step 3: Continue to lower the flushing pipe so that its inlet is aligned with the outlet, and introduce high-pressure water flow to backwash the filter screen; Step 4: After cleaning is completed, drive the flushing pipe to move upward and reset, cut off the flushing water flow, and the system returns to normal drainage status.

[0014] The present invention has the following advantages: (1) This invention improves the online self-cleaning efficiency of the filter screen by integrating a dual cleaning mechanism of mechanical scraping and high-pressure water flushing. The scraper assembly in its flushing mechanism can physically scrape the surface of the filter screen under the control of the drive component to loosen the silt in advance; then the inlet and outlet are aligned, and the high-pressure water flow flushes the filter screen in reverse, forming a synergistic sludge removal effect of "mechanical and hydraulic". This avoids the cumbersome process of traditional pipe disassembly, shortens the sludge removal time, and ensures the continuous and stable operation of the mine drainage system.

[0015] (2) The present invention ensures the concentrated effect of high-pressure water flow during the cleaning process by setting a sliding sealing structure between the sealing piston and the flushing pipe, a sealing ring at the flow port, and axial arrangement of multiple scrapers, thus preventing pressure loss caused by leakage. At the same time, the inlet pipe and the outlet pipe are connected by a detachable connection (such as screw fixing), which allows the inlet pipe assembly to be quickly separated and pulled out during later maintenance, making it convenient to replace or deeply clean internal parts such as the filter screen and scrapers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall internal structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the flushing tube of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A.

[0017] In the diagram: 1. Inlet pipe; 2. Outlet pipe; 3. Outlet; 4. Connecting pipe; 5. Filter screen; 6. Flushing mechanism; 7. Scraper; 8. Sealing ring; 601. Flushing pipe; 602. Sealing piston; 603. Flow port; 604. Drive component; 641. Push rod; 642. Water pressure sensor. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0019] The embodiments disclose mine drainage pipe connectors for easy dredging, such as... Figures 1-3 As shown, it mainly consists of two structural components: an inlet pipe 1 and an outlet pipe 2. The inlet pipe 1 has multiple outlets 3 on its outer top wall, while the outlet pipe 2 is fixedly fitted onto the outside of the inlet pipe 1. The openings at both ends of the outlet pipe 2 are sealed to the outer wall of the inlet pipe 1, and both ends of the inlet pipe 1 penetrate the upper and lower ends of the outlet pipe 2, maintaining a certain distance between the outer wall of the inlet pipe 1 and the inner wall of the outlet pipe 2, thus forming a ring-shaped flow space.

[0020] In addition, a connecting pipe 4 is fixedly connected radially to the outer wall of the outlet pipe 2 for connecting to external pipelines. During system connection, the bottom opening of the inlet pipe 1 is connected to the drainage pipeline in the direction of incoming water, and one end of the connecting pipe 4 of the outlet pipe 2 is connected to the outlet pipe 2, thus forming a complete drainage channel. During normal drainage operation, water enters from the bottom of the inlet pipe 1, flows upwards, and is guided through the outlet 3 to the annular space between the inlet pipe 1 and the outlet pipe 2, finally converging into the outlet pipe 2 via the connecting pipe 4 for discharge.

[0021] like Figures 1-2 As shown, the connector has at least two outlets 3. In this specific embodiment, four outlets 3 are preferably used. They are evenly arranged in a circular array around the center of the inlet pipe 1 on the outer circumferential wall of the inlet pipe 1 to ensure that the water flow can be evenly and smoothly discharged outward. To further improve the quality of the discharged water and intercept solid impurities, a filter screen 5 is fixedly installed at each outlet 3. The filter screen 5 can effectively intercept particulate matter in the water flow, thereby achieving a preliminary filtration function and preventing large-diameter debris from entering subsequent pipe sections and causing siltation or wear.

[0022] Given that filter screen 5 is prone to clogging due to the accumulation of impurities during long-term filtration operations, the connector also integrates an online self-cleaning mechanism to enable flushing and maintenance of filter screen 5 without shutting down the system. The flushing mechanism 6 mainly consists of a flushing pipe 601, a sealing piston 602, a flow port 603, and a drive component 604.

[0023] Specifically, such as Figures 1-2As shown, the flushing pipe 601 is inserted into the inlet pipe 1 through the top opening, with its upper end extending beyond the inlet pipe 1 and its lower end fixedly connected to a sealing piston 602 coaxially arranged. A sliding seal is formed between the outer wall of the sealing piston 602 and the inner wall of the inlet pipe 1. Under normal conditions, the sealing piston 602 is positioned above the outlet 3 of the inlet pipe 1, sealing the top opening of the inlet pipe 1 and thus isolating the flushing pipe 601 from the internal chamber of the inlet pipe 1. A flow port 603 is provided at a corresponding position on the wall of the flushing pipe 601, corresponding circumferentially to the outlet 3 on the inlet pipe 1, and their dimensions are matched. During cleaning, the flushing pipe 601 is moved downward by the drive component 604, which drives the sealing piston 602 and the flow port 603 to move downward synchronously. When the flow port 603 and the water outlet 3 of the inlet pipe 1 reach the same height, they are aligned and connected. The internal cavity of the flushing pipe 601 can then be connected to the annular space inside the water outlet pipe 2 through the flow port 603 and the water outlet 3.

[0024] At this point, the high-pressure water flow introduced into the flushing pipe 601 can flush the surface of the filter screen 5, achieving online automatic cleaning. The start, stop, and stroke of the entire flushing process are precisely controlled by the drive component 604, ensuring the effectiveness and automation of the cleaning operation while keeping the channel sealed. When dredging is required, specific openings can be easily opened through external operation, allowing access to high-pressure water, air, or dredging tools for backwashing or mechanical dredging without extensive pipe disassembly. This significantly improves the efficiency and convenience of dredging operations, effectively ensuring the long-term stable operation of the mine drainage system.

[0025] In addition, a circular scraper 7 is fixedly installed at the bottom of the sealing piston 602, and the outer circumference of the scraper 7 is kept in close contact with the inner wall of the water inlet pipe 1. To further enhance the cleaning effect, flexible cleaning components such as brush bristles can be added to the outer edge of the scraper 7; at the same time, multiple scrapers 7 can also be arranged along the axial direction of the flushing pipe 601 and positioned below the flow port 603. When the flushing program is started, the sealing piston 602 moves down with the flushing pipe 601, and the scraper 7 at its bottom will first contact the surface of the filter screen 5, removing the attached impurities through mechanical scraping, thus achieving preliminary physical cleaning. As the flushing pipe 601 continues to descend, multiple scrapers 7 can repeatedly scrape the filter screen 5 in sequence, thereby effectively loosening the deposits. On this basis, when the flow port 603 is aligned with the water outlet 3, the injected high-pressure flushing water will thoroughly flush the filter screen 5. Through the dual action of "mechanical scraping combined with hydraulic flushing", the effectiveness and reliability of online cleaning are significantly improved.

[0026] After the cleaning operation is completed, the drive component 604 will drive the flushing pipe 601 to move upward, so that the sealing piston 602 will return to the position above the outlet 3. At this time, the flow port 603 will be offset from the outlet 3, the flushing channel will be closed, and the equipment will return to normal drainage status, thereby quickly completing the maintenance and cleaning of the filter screen 5 and ensuring the stable operation of the drainage system.

[0027] like Figures 1-2 As shown, it should be noted that a sealing ring 8 is also fixedly fitted on the outer wall of the section of the flushing pipe 601 where the flow port 603 is opened. When the flushing pipe 601 moves down to align the flow port 603 with the outlet 3, the sealing ring 8 can fill the gap at the joint between the two, ensuring the sealing of the interface, preventing leakage of high-pressure flushing water, ensuring that the flushing pressure is concentrated on the surface of the filter screen 5, and improving the efficiency and safety of the self-cleaning process.

[0028] like Figures 1-3 As shown, the specific driving component 604 mainly includes a push rod 641 and a water pressure sensor 642. The push rod 641 is fixedly installed at the flange seat at the top of the outlet pipe 2, and its telescopic shaft is fixedly connected to the top of the flushing pipe 601. The lifting and lowering adjustment of the flushing pipe 601 is achieved by controlling the stroke of the telescopic shaft. The water pressure sensor 642 is located in the inlet chamber below the sealing piston 602 to monitor water pressure changes in this area in real time. When the filter screen 5 becomes clogged, the increased flow resistance causes the water pressure in the lower chamber of the sealing piston 602 to rise. When the water pressure sensor 642 detects that the pressure value exceeds a preset threshold, it transmits a signal to the control system, which then triggers the push rod 641 to move the flushing pipe 601 downwards, simultaneously starting the external flushing water pump to achieve a fully automated cleaning operation.

[0029] It should be noted that in other embodiments, the connection between the water inlet pipe 1 and the water outlet pipe 2 can also be configured to be a detachable fixed connection by screws, so that the water inlet pipe 1 can be easily pulled out for maintenance in the later stage.

[0030] A dredging method for mine drainage pipe connectors that facilitate dredging includes the following steps: Step 1: Start the mine's main drainage pump. Water enters through the bottom opening of the inlet pipe 1 and flows upward. When the water reaches the outlet 3, it is filtered by the filter screen 5 installed there, and solid impurities are trapped. The filtered water then flows evenly through multiple outlets 3 into the annular space between the inlet pipe 1 and the outlet pipe 2.

[0031] Step 2: After the water flow gathers in the annular space, it is introduced into the mine outlet pipe 2 through the connecting pipe 4 on the side wall of the outlet pipe 2, and finally discharged to the designated location. During the drainage process, the water pressure sensor 642 continuously monitors the water pressure in the lower chamber of the sealed piston 602. As long as the water pressure does not exceed the set threshold, the system maintains normal drainage.

[0032] Step 3: When filter 5 becomes partially clogged due to the accumulation of impurities, the water flow resistance in inlet pipe 1 increases, causing the water pressure in the lower chamber of sealing piston 602 to rise. Water pressure sensor 642 detects that the pressure value has reached the preset threshold and sends a signal to the control system to automatically start the cleaning program.

[0033] Step 4: The control system first instructs push rod 641 to move, pushing flushing pipe 601 downwards. Flushing pipe 601 then moves sealing piston 602 and its bottom scraper 7 downwards together.

[0034] Step 5: As the scraper 7 descends, its outer edge adheres to the inner wall of the inlet pipe 1, powerfully scraping the surface of the filter screen 5, effectively peeling off and loosening most of the firmly attached particles. Multiple scrapers 7 installed on the flushing pipe 601 can clean the filter screen 5 multiple times.

[0035] Step Six: When the flushing pipe 601 descends to a specific position, the flow port 603 on its pipe wall is completely aligned with the outlet 3 of the inlet pipe 1. At this time, the sealing ring 8 ensures a seal at the joint. The external flushing water pump starts automatically, and the high-pressure water flow directly impacts the filter screen 5 through the flushing pipe 601 and the flow port 603, thoroughly flushing away the loosened impurities, which are then discharged into the annular space and carried out with the main water flow.

[0036] Step 7: After the preset cleaning time is completed, the control system commands push rod 641 to retract, pulling flushing pipe 601 upwards to reset. Sealing piston 602 re-closes the top of inlet pipe 1, and the flow port 603 is offset from the outlet 3, cutting off the flushing water flow. The system automatically returns to normal drainage.

[0037] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A mine dewatering conduit connector for facilitating dewatering of a mine, characterised in that, The water inlet pipe (1) and the water outlet pipe (2) are connected through a detachable structure. The outer circumference of the scraper (7) is attached to the inner wall of the water inlet pipe (1), and the scraper (7) is arranged in multiple along the axial direction of the flushing pipe (601).

2. A mine conveyor pipe coupling for facilitating dewatering of a mine, as claimed in claim 1, wherein, The steps include: Step one: water flows from the bottom of the water inlet pipe (1), is filtered by the filter screen (5), enters the annular flow space through the water outlet (3), and is finally discharged through the connecting pipe (4), while the water pressure in the water inlet chamber is monitored in real time; Step two: when the monitored water pressure exceeds the preset threshold, the push rod (641) drives the flushing pipe (601) to move downward, and the scraper (7) at the bottom of the flushing pipe (601) scrapes the surface of the filter screen (5) to loosen the accumulated substances; ​ 3. A mine conveyor pipe coupling for facilitating dewatering of a mine, as claimed in claim 2, wherein, ​ 4. A mine conveyor pipe coupling for facilitating dewatering of a mine, as claimed in claim 2, wherein, ​ 5. A mine conveyor pipe coupling for facilitating dewatering of a mine, as claimed in claim 2, wherein, ​ ​ 6. The mine conveyor pipe coupling for facilitating dewatering of a mine as defined in claim 1, wherein, ​ 7. A mine conveyor pipe coupling for facilitating dewatering of a mine, as claimed in claim 3, wherein, ​ 8. The method for facilitating the dredging of a mine conduit connector of a mine drainage pipeline according to claims 1-7, characterized in that, ​ ​ ​ Step three: continue to move down the flush pipe (601) to make its through-flow port (603) align with the water outlet (3), and introduce high-pressure water flow to reverse flush the filter screen (5); Step four: after cleaning, drive the flush pipe (601) to move up and reset, cut off the flush water flow, and the system returns to the normal drainage state.

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