Cleaning device for gas extraction pipe network

Abstract

The invention relates to the technical field of coal mine pipeline cleaning, and discloses a cleaning device for a gas extraction pipe network, the cleaning device comprises a carrying ring, a driving motor is fixedly connected to the surface of the carrying ring, a cleaning assembly is arranged on the side, close to the driving motor, of the surface of the carrying ring, and small teeth are fixedly connected to the output end of the driving motor. The cleaning assembly comprises a rotating ring rotationally connected to the interior of the carrying ring, by arranging the auxiliary mechanism and the two blocking mechanisms, aiming at the multi-section splicing particularity of the pipeline, the device can form a relatively closed operation cavity in the pipeline, so that a cleaning area and a working area are separated, normal operation of an extraction system during operation is guaranteed, and the working efficiency is improved. Due to the fact that the multiple sections of the pipeline, the second semi-arc-shaped air bag and the first semi-arc-shaped air bag can be adjusted in real time, effective sealing at the complex pipe diameter and the connector is guaranteed, meanwhile, liquid level difference can be manufactured, branch pipe drainage is cooperated, and guiding collection and efficient recovery of waste liquid and pollutants are achieved.

Description

Technical Field

[0001] This invention relates to the field of coal mine pipeline cleaning technology, specifically a cleaning device for gas extraction pipeline networks. Background Technology

[0002] Coal mine gas drainage pipelines are crucial for ensuring safe production in coal mines. Their internal unobstructed flow directly determines the efficiency of gas control and the safety of underground operations. The pipeline system has a complex structure with numerous branch pipes and bends. During long-term operation, coal dust, viscous coal tar, and hardened scale easily adhere to and accumulate on the inner walls, leading to a reduction in the effective pipe diameter, a significant decrease in drainage efficiency, and an increase in system resistance. These deposits not only obstruct airflow but may also generate static sparks due to disturbance and friction. Furthermore, the continuously flowing gas-air mixture inside the pipeline poses a potential explosion risk. Due to the narrow and tortuous internal space of the pipeline, specialized devices that can enter the pipe are usually required, along with various cleaning tools, to achieve internal treatment.

[0003] Existing conventional cleaning techniques for this type of pipeline still have problems. For example, using high-pressure water jets can easily generate static electricity, posing a safety hazard. Furthermore, if the wastewater remains in the pipe after flushing, it can cause secondary blockages. Purely mechanical cleaning methods pose a direct risk of sparks generated by friction and collision. Manually cleaning the pipeline by dismantling it in sections after production has stopped is not only labor-intensive, inefficient, and costly, but also severely impacts normal coal mine production due to the shutdown. Coal mine gas pipelines are often composed of multiple sections spliced ​​together, and their structure includes screen pipe sections with oblique holes and completely sealed conveying sections. This complex structure further increases the difficulty of internal cleaning. Summary of the Invention

[0004] The purpose of this invention is to provide a cleaning device for gas extraction pipeline networks to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a cleaning device for a gas extraction pipeline network, comprising a carrier ring, a drive motor fixedly connected to the surface of the carrier ring, a cleaning component disposed on the side of the carrier ring near the drive motor, a small tooth fixedly connected to the output end of the drive motor, the cleaning component comprising a rotating ring rotatably connected inside the carrier ring, two sliding grooves being opened circumferentially opposite each other on the surface of the rotating ring, a plurality of flexible cleaning plates being fixedly connected at equal intervals to one end of the rotating ring, a guide ring being fixedly connected to the ends of the flexible cleaning plates, an directional ring disposed inside the rotating ring, a lifting ring being slidably sleeved inside the directional ring, two locking blocks being fixedly connected to the surface of the lifting ring, an auxiliary mechanism disposed in the inner ring of the carrier ring, the auxiliary mechanism comprising a flow pipe fixedly connected to the inner ring of the carrier ring, the flow pipe having a cavity inside, a branch pipe fixedly connected inside the cavity, one end of the branch pipe penetrating the cavity of the flow pipe and extending to its outer surface, and two sets of sealing mechanisms disposed on the surface of the flow pipe.

[0006] The directional ring is fixedly connected to the carrier ring, the guide ring is rotatably connected to the surface of the lifting ring, the locking block is slidably disposed in the sliding groove and is limited by it, and the rotating ring has toothed grooves equidistantly opened on its surface, and the small teeth mesh with the rotating ring.

[0007] The sealing mechanism includes a rigid ring fixedly connected to the surface of the flow tube. Two arc-shaped slots are opened opposite each other on the surface of the rigid ring. A semi-arc-shaped airbag one and a semi-arc-shaped airbag two are fixedly connected inside the two arc-shaped slots, respectively. A branch pipe one is fixedly connected to the surface of the semi-arc-shaped airbag one, and a branch pipe two is fixedly connected to the surface of the semi-arc-shaped airbag two.

[0008] A pressure relief valve is fixedly connected inside the branch pipe.

[0009] Branch pipe one is connected to the interior of the semi-circular airbag one, and branch pipe two is connected to the interior of the semi-circular airbag two.

[0010] When the guide ring is in its initial state, one end of it abuts against the adjacent rigid ring.

[0011] The surface of the flow tube has a set of flow holes at the equidistant gaps of each flexible cleaning sheet, which are used to connect the inner cavity of the flow tube to the gas pipeline.

[0012] The opening height of the flow passage is higher than the height of the branch pipe inside the flow passage.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] With the addition of auxiliary mechanisms and two sealing mechanisms, the device can form a relatively closed working chamber inside the pipeline, which is designed to address the unique characteristics of multi-segment splicing of the pipeline. This separates the clean area from the working area, ensuring the normal operation of the extraction system during operation. Due to the multi-segment pipeline, the two semi-circular airbags can be adjusted in real time to ensure effective sealing at complex pipe diameters and interfaces. At the same time, it can also create a liquid level difference and coordinate with the drainage of the branch pipes, realizing the guiding collection and efficient recovery of waste liquid and pollutants.

[0015] Furthermore, through the design of the cleaning components, multiple flexible cleaning plates revolve around the pipe axis during operation, while intermittently bending and relaxing, applying multi-directional shearing forces to the pipe wall. When bending, they can also scrape the guide tube. Combined with soaking, this effectively removes highly adhesive coal tar and scale. The deformation and movement of the flexible cleaning plates, combined with water flow, flushes complex areas such as oblique holes and pipe welds in the screen pipe, improving cleaning capabilities. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention;

[0017] Figure 2 This is a schematic diagram showing the overall disassembly of the device of the present invention;

[0018] Figure 3 This is a schematic diagram of the disassembled structure of the cleaning component of the present invention;

[0019] Figure 4 This is a schematic cross-sectional view of the device of the present invention;

[0020] Figure 5 This is a schematic diagram showing the dissection of the inner chamber of the flow tube of the present invention.

[0021] In the diagram: 100, carrier ring; 101, drive motor; 110, rotating ring; 111, sliding groove; 112, flexible cleaning sheet; 113, guide ring; 114, orientation ring; 115, lifting ring; 116, locking block; 200, auxiliary mechanism; 201, flow pipe; 202, branch pipe; 300, sealing mechanism; 301, rigid ring; 302, semi-circular airbag one; 303, semi-circular airbag two; 304, branch pipe one; 305, branch pipe two. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] This invention discloses a cleaning device for a gas extraction pipeline network, comprising a carrier ring 100, a drive motor 101 fixedly connected to the surface of the carrier ring 100, a cleaning component disposed on the surface of the carrier ring 100 near the drive motor 101, a small tooth fixedly connected to the output end of the drive motor 101, and a rotating ring 110 rotatably connected inside the carrier ring 100. Two sliding grooves 111 are circumferentially oppositely formed on the surface of the rotating ring 110, and a plurality of flexible cleaning plates 112 are equidistantly fixedly connected to one end of the rotating ring 110. The ends of the flexible cleaning plates 112 are collectively fixedly connected to... There is a guide ring 113, a directional ring 114 is provided inside the rotating ring 110, a lifting ring 115 is slidably sleeved inside the directional ring 114, and two locking blocks 116 are fixedly connected to the surface of the lifting ring 115. An auxiliary mechanism 200 is provided in the inner ring of the carrier ring 100. The auxiliary mechanism 200 includes a flow pipe 201 fixedly connected to the inner ring of the carrier ring 100. The flow pipe 201 has a cavity inside. A branch pipe 202 is fixedly connected inside the cavity. One end of the branch pipe 202 passes through the cavity of the flow pipe 201 and extends to its outer surface. Two sets of sealing mechanisms 300 are provided on the surface of the flow pipe 201.

[0024] The directional ring 114 is fixedly connected to the carrier ring 100, the guide ring 113 is rotatably connected to the surface of the lifting ring 115, the locking block 116 is slidably disposed in the sliding groove 111 and is limited by it, and the rotating ring 110 has toothed grooves equidistantly opened on its surface, with small teeth meshing with the rotating ring 110.

[0025] The sealing mechanism 300 includes a rigid ring 301 fixedly connected to the surface of the flow tube 201. Two arc-shaped slots are opened opposite each other on the surface of the rigid ring 301. A semi-arc-shaped airbag 302 and a semi-arc-shaped airbag 303 are fixedly connected inside the two arc-shaped slots, respectively. A branch pipe 304 is fixedly connected to the surface of the semi-arc-shaped airbag 302, and a branch pipe 305 is fixedly connected to the surface of the semi-arc-shaped airbag 303.

[0026] During use, the semi-circular airbags 302 and 303 on the two sealing mechanisms 300 need to be connected to independent inflation devices to branch pipes 304 and 305 respectively, that is, at least four need to be connected to them respectively.

[0027] A pressure relief valve is fixedly connected inside pipe 202.

[0028] During use, in order to prevent accidents during water injection or improper operation that could cause the water to fail to compress the nitrogen in the sealed space, the pressure relief valve will cause the pressure to rise sharply. When the pressure rises to its set value, it will trigger the protective effect, thereby protecting the semi-circular airbag 302 and semi-circular airbag 303 from being damaged by high pressure, and preventing damage to pipes or connecting parts.

[0029] Branch tube 304 is connected to the interior of semi-circular airbag 302, and branch tube 305 is connected to the interior of semi-circular airbag 303.

[0030] When the guide ring 113 is in its initial state, one end of it abuts against the adjacent rigid ring 301.

[0031] On the surface of the flow tube 201, a set of flow holes are provided at the equidistant gaps of each flexible cleaning plate 112 to connect the inner cavity of the flow tube 201 with the gas pipeline.

[0032] The opening height of the flow passage is higher than the height of the branch pipe 202 inside the flow passage pipe 201.

[0033] Working principle:

[0034] Preparations, see reference Figure 1 A flexible pipe can be added to the surface of another rigid ring 301, away from the flexible cleaning plate 112, with one end fixedly connected to the carrier ring 100. This is shown in the figure but not marked. The purpose is to protect the flow pipe 201 in case of severe internal corrosion. However, this flexible pipe is not needed for normal maintenance and cleaning. Furthermore, positive pressure devices can be connected to the branch pipes 304 and 305 on the two sealing mechanisms 300, respectively, or devices that can inflate the semi-circular airbags 302 and 303. Both branch pipes 304 and 305 on the two rigid rings 301 need independent ventilation to inflate the semi-circular airbags 302 and 303, connecting to a negative pressure device to the branch pipe 202. Subsequently, the flow is transmitted through a pipeline crawler or other device. The device is inserted into the gas extraction pipeline and removed from pipeline crawler vehicles or similar transport devices. It should be noted that in the initial state, the drive motor 101 needs to be activated in advance so that the small teeth at the output end of the drive motor 101 are working. The small teeth drive the rotating ring 110 to rotate. When the rotating ring 110 rotates, the sliding groove 111 drives the lifting ring 115 to rise. The locking block 116 on the surface of the lifting ring 115 is restricted by the directional ring 114 and the sliding groove 111, and only produces lifting or lowering motion. When the lifting ring 115 rises to its maximum stroke, it will contact the rigid ring 301, causing the rigid ring 301 to rise. At the same time, the flow pipe 201 between the rotating ring 110 and this part of the rigid ring 301 is stretched, and multiple flexible cleaning plates 112 are also in a stretched state.

[0035] When this device reaches a dirty section of the pipeline, if the pipeline is inside a completely sealed section of the pipeline, the following measures can be taken;

[0036] When the passage is in the sealed section, nitrogen is injected into the cavity of the flow pipe 201 to expel the existing air and gas from the pipe, thus completely replacing the current gas environment. Then, gas is injected into the branch pipes 304 and 305 on both flow pipes 201, causing the semi-circular air bladders 302 and 303 on the two rigid rings 301 to expand at the same rate, creating a complete annular section and sealing the current area. After the semi-circular air bladders 302 and 303 on the two rigid rings 301 have expanded through the branch pipes 304 and 305, the nitrogen injection into the cavity inside the flow pipe 201 is stopped. The process begins with injecting water into the cavity of the flow pipe 201. Water flows through the original path of nitrogen from inside the cavity of the flow pipe 201, then through the flow holes to a relatively sealed space formed by the expansion of two sets of rigid rings 301 and semi-circular airbags 302 and 303. Once the water reaches a certain pressure, without active drainage via a connected negative pressure device, the pressure relief valve inside the branch pipe 202 will release air and water after reaching a certain pressure. When water is observed flowing out of the branch pipe 202, it indicates that water injection is no longer needed, and the injection into the cavity of the flow pipe 201 is stopped. When using water for cleaning, it's important to note that cleaning fluid can be injected in conjunction with water. First, nitrogen should be injected to replace the gas, then the blocked section should be sealed to create a localized, enclosed space for soaking. This allows for online cleaning without affecting the normal operation of the pipeline; other parts of the pipeline can continue operating normally. If gas extraction stops, the coal face may be forced to shut down. By "injecting nitrogen first," the risk is eliminated. For example, the semi-circular airbags 302 and 303 are inflated to replace explosive gases in the work area with inert gases, while simultaneously eliminating the impact of high-pressure water jets. The soaking method allows time for softening and decomposing stubborn coal tar and scale. Furthermore, within the enclosed space, temperature and time can be better controlled. To achieve maximum cleaning, the entire soaking process takes place within the currently enclosed area. Waste liquid and impurities are immediately recovered by the negative pressure device through branch pipe 202, preventing environmental pollution or downstream contamination. Furthermore, due to the localized soaking, the water and cleaning agent usage is significantly lower than requiring flushing the entire pipe, resulting in lower costs. This avoids the heavy and dangerous manual pipe disassembly and cleaning work, as well as downtime losses. After the soaking time is reached, the drive motor 101 begins operation. Since the semi-circular airbags 302 and 303 on the sealing mechanism 300 near the flexible cleaning plate 112 have already expanded, the rigid ring 301 still provides a limiting effect on the flow pipe 201 when the drive motor 101 rotates. (See reference...) Figure 2When the output of the drive motor 101 drives the small gear to work, it will drive the rotating ring 110 to rotate. The sliding slot 111 drives the locking block 116 to work inside it. At the same time, the locking block 116 is restricted by the directional ring 114. (See reference...) Figure 3 This causes the lifting ring 115 to perform only linear reciprocating motion. While the lifting ring 115 is in this linear reciprocating motion, the rotating ring 110 rotates synchronously, but the rotation angle of the rotating ring 110 is smaller than the initial angle to prevent the lifting ring 115 from touching the bottom of the hard ring 301 and affecting the semi-circular airbag 302 and semi-circular airbag 303. When the guide ring 113 moves towards the drive motor 101, the flexible cleaning plate 112 will curl. During rotation, it will cause the water in this water injection area to rotate clockwise and counterclockwise. Simultaneously, the curled edges of the flexible cleaning plates 112 will scrape the inside of the pipe, removing dirt and simultaneously working with the branch pipe 202 to suction it away. Water acts as a lubricant, greatly reducing the friction coefficient between the flexible cleaning plate 112 and the inner wall of the pipe. The flexible cleaning plate 112 achieves "hydraulic synergistic scraping" through "rotation" and "curving." The flexible cleaning plate 112 only mechanically scrapes... The water flow is auxiliary to the pipe wall cleaning process. The flexible cleaning plate 112 powerfully agitates the water flow within the confined space, creating strong eddies and turbulence. This effectively cleans the weld seams, ensuring thorough mixing of the cleaning fluid and dirt, and impacting loosened contaminants. Once the dirt is removed, it is drawn away by negative pressure, completing the cleaning process. After cleaning, the semi-circular airbag 302 near the branch pipe 202 is manipulated. The semi-circular airbag 302 slightly contracts, while the other semi-circular airbag 303 inflates, allowing... The rigid ring 301 is tilted, directing the low liquid level of the water flow toward the branch pipe 202, so that the branch pipe 202 can more effectively pump away the water in the section. Since the pipe may deform, the lowest point may not be exactly at the branch pipe 202, resulting in stagnant water that cannot be drained. This water contains a large number of pollutants that have been cleaned up. By tilting the angle, the lowest point of drainage is provided. The less residual water, the faster the inner wall of the pipe dries, and the more accurate the detection conditions are provided for subsequent inspection using a pipe endoscope.

[0037] When in the mesh screen section of the pipeline, i.e., the extraction section, there are multiple inclined holes on the pipeline surface for extraction and water discharge. At this time, the following measures need to be taken: water is continuously injected into the inner cavity of the flow pipe 201, while the rotating ring 110 operates continuously, and the branch pipe 202 also continuously extracts water. However, during the air inflation process, a low water level needs to be created in advance using the semi-circular airbags 302 and 303. The flexible cleaning plate 112, as it passes through the rotating ring 110, continuously curls and straightens, cleaning the screen tube section of the mesh screen. The main problem in the screen tube section is not internal scaling, but rather blockage of the inclined holes. The curling and straightening action of the cleaning plate 112 can effectively scrape off the deposits on the filter screen on the inner wall surface of the screen tube, preventing them from further clogging the holes. The water flow generates clockwise and counterclockwise eddies, which repeatedly and powerfully flush the screen. For the oblique holes, the particles that are blocked in the holes are "scooped out". The impurities that are flushed out are promptly pumped away by the branch pipe 202 to ensure that they will not block other holes or downstream pipes again. The efficiency is higher than that of the immersion treatment in the closed section. Moreover, the strength of the screen tube in this section is higher than that of the pipe in the closed extraction section. While effectively cleaning, it prevents the holes from being permanently blocked, avoiding the huge cost of replacing the entire screen tube due to functional failure.

[0038] For branch pipes and main pipes, the operation differs from that of the pipe mesh screen section. When reaching the connection area of ​​the branch pipe and main pipe, all three methods require pre-injection of nitrogen, but the fixing methods differ. One set of semi-circular airbags 302 and 303, i.e., a set of sealing mechanisms 300 near the branch pipe 202, creates a low water level difference in advance, ensuring that the branch pipe 202 is at a low position during operation. The other sealing mechanism 300, i.e., the semi-circular airbags 302 and 303 on the rigid ring 301, has one semi-circular airbag 303, the one furthest from the branch pipe, inflating first, pressing this set of sealing mechanisms 300 towards the branch pipe. Subsequently, the semi-circular airbag 303 closer to the branch pipe... Airbag 302 inflates, creating an angle, and then the connection between the branch pipe and the main pipe is flushed and cleaned using a pipe mesh screen cleaning method. The branch pipe interface is a difficult part of the pipeline to clean. The semi-circular airbags 302 and 303 on the main pipe inflate and seal the connection. In the irregular area of ​​the branch pipe interface, by controlling the asymmetrical and time-sequential expansion of the airbags on both sides of the semi-circular airbags 302 and 303, an adaptive effect is produced, ensuring that even at the most irregular branch pipe interface, a relatively sealed "cleaning chamber" can be formed to effectively remove dirt. This completes the cleaning work inside all the pipelines.

[0039] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A cleaning device for a gas extraction pipe network, characterized in that Include: The carrier ring (100) is fixedly connected with a driving motor (101) on the surface, and a cleaning assembly is arranged on the side close to the driving motor (101) of the carrier ring (100). The output end of the driving motor (101) is fixedly connected with a small tooth; The cleaning assembly comprises a rotating ring (110) rotatably connected inside the carrier ring (100), two sliding notches (111) are oppositely arranged on the surface of the rotating ring (110) in the circumferential direction, a plurality of flexible cleaning pieces (112) are fixedly connected at equal intervals on one end of the rotating ring (110), a guide ring (113) is fixedly connected at the end of the flexible cleaning piece (112), a directional ring (114) is arranged inside the rotating ring (110), a lifting ring (115) is slidably sleeved inside the directional ring (114), and two clamping blocks (116) are fixedly connected on the surface of the lifting ring (115). An auxiliary mechanism (200) is arranged in the inner ring of the carrier ring (100), the auxiliary mechanism (200) comprises a through-flow pipe (201) fixedly connected to the inner ring of the carrier ring (100), the through-flow pipe (201) has a cavity inside, and a branch pipe (202) is fixedly connected inside the cavity. Two groups of sealing mechanisms (300) are arranged on the surface of the through-flow pipe (201).

2. A cleaning device for a gas extraction pipe network according to claim 1, characterized in that The directional ring (114) is fixedly connected with the carrier ring (100), the guide ring (113) is rotatably connected with the surface of the lifting ring (115), the clamping block (116) is slidably arranged in the sliding notch (111) and limited thereby, a gear slot is formed on the surface of the rotating ring (110) at equal intervals, and the small tooth is engaged with the rotating ring (110).

3. A cleaning device for a gas extraction pipe network according to claim 2, characterized in that: The sealing mechanism (300) comprises a hard ring (301) fixedly connected to the surface of the through-flow pipe (201), two arc-shaped notches are oppositely arranged on the surface of the hard ring (301), a half-arc-shaped air bag one (302) and a half-arc-shaped air bag two (303) are fixedly connected in the two arc-shaped notches respectively, a branch pipe one (304) is fixedly connected to the surface of the half-arc-shaped air bag one (302), and a branch pipe two (305) is fixedly connected to the surface of the half-arc-shaped air bag two (303).

4. A cleaning device for a gas extraction pipe network according to claim 3, characterized in that: The branch pipe (202) is fixedly connected with a pressure relief valve inside.

5. A cleaning device for a gas extraction pipe network according to claim 4, characterized in that: The branch pipe one (304) is in communication with the inside of the half-arc-shaped air bag one (302), and the branch pipe two (305) is in communication with the inside of the half-arc-shaped air bag two (303).

6. A cleaning device for a gas extraction pipe network according to claim 5, characterized in that: When the guide ring (113) is in the initial state, one end of the guide ring (113) abuts against the adjacent hard ring (301).

7. A cleaning device for a gas extraction pipe network according to claim 6, characterized in that: A group of through-flow holes are formed on the surface of the through-flow pipe (201) corresponding to the equal-interval gaps of the flexible cleaning pieces (112), so as to communicate the inner cavity of the through-flow pipe (201) with the gas pipeline.

8. A cleaning device for a gas extraction pipe network according to claim 7, characterized in that: The opening height of the through-flow hole is higher than the height of the branch pipe (202) in the through-flow pipe (201).

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