A waste gas pipeline dredging device

Abstract

The present application relates to the technical field of waste gas pipeline dredging, and particularly relates to a waste gas pipeline dredging device, which comprises a cleaning machine, an electrically-controlled spray head one and a through-connected connecting water pipe are arranged on the cleaning machine, the connecting water pipe is communicated with an external liquid source, a cleaning structure is arranged on the cleaning machine, and a controlled and adjusted wheel set structure is arranged on the cleaning machine. Through the cooperation of the flushing of the front-end annular water column and the rear-end cleaning structure, a scraping, flushing and discharging integrated cleaning process is formed. The wheel set structure can automatically adjust the supporting radius according to the inner diameter of the pipeline, so that the device can keep stable operation in the middle in different pipe diameter working conditions, the eccentric wear, jamming or poor sealing are avoided, and thus the dredging efficiency and equipment adaptability are improved.

Description

Technical Field

[0001] This invention relates to the field of waste gas pipeline dredging technology, specifically to a waste gas pipeline dredging device. Background Technology

[0002] Abandoned pipelines refer to closed pipelines specifically used for collecting and transporting specific polluting waste gases generated during industrial production processes, such as chemical plant exhaust gases and paint booth fumes, to end-of-pipe treatment equipment. Their interiors are prone to adhesion, scaling, and even blockage due to dust, oil mist, resin, or reaction byproducts contained in the waste gases, severely affecting system ventilation efficiency and potentially causing safety hazards or environmental pollution accidents. Therefore, regularly and efficiently clearing abandoned pipelines is a crucial step in ensuring the stable, safe, and compliant operation of waste gas treatment systems.

[0003] Currently, automatic dredging devices for abandoned pipes typically employ a wheeled walking structure that moves autonomously inside the pipe and integrates rotating blades and brush heads to scrape and peel off the deposits on the pipe wall. At the same time, the cleaned-up sludge is recycled in real time through negative pressure suction or filtration separation systems to prevent secondary deposition or blockage.

[0004] However, existing devices generally adopt a fixed wheel assembly structure, whose wheel track and support radius are not adjustable, making it difficult to adapt to pipeline conditions with different nominal diameters or variable diameter sections. In practical applications, this type of structure is prone to problems such as poor wheel-to-pipe wall contact, insufficient driving force, skewed movement, and even jamming, which seriously restricts the versatility, reliability, and automation level of pipeline cleaning operations.

[0005] To address the aforementioned technical challenges, there is an urgent need to develop a waste gas pipeline cleaning device. This device's wheel assembly structure can automatically adjust the radial position of the wheels according to changes in the pipeline's inner diameter, ensuring stable fit, uniform force distribution, and reliable drive across various pipe diameters. This will enhance the applicability, operational efficiency, and safety of the pipeline cleaning device, providing key technical support for the long-term operation and maintenance of industrial waste gas treatment systems. Summary of the Invention

[0006] In response to the problems raised in the background art, the present invention provides a waste gas pipeline unblocking device to solve them, and the present invention will be further described below.

[0007] A waste gas pipeline unblocking device includes a cleaning machine, which is equipped with an electrically controlled nozzle and a connecting water pipe that is connected to an external liquid source. The cleaning machine is equipped with a cleaning structure and a controllable and adjustable wheel assembly structure.

[0008] Preferably, the wheel assembly structure includes eight symmetrical support frames fixed to the outer wall of the cleaning machine. Each support frame is equipped with a sliding frame, and the sliding frame is equipped with a movable wheel. A connecting spring is provided between the sliding frame and the support frame.

[0009] Preferably, each sliding frame is provided with an adjusting screw, and the two adjusting screws arranged opposite each other are fixedly connected by a straight rod. The outer walls of the two vertically arranged straight rods are respectively keyed to a worm and a sprocket, and the outer walls of the two horizontally arranged straight rods are respectively keyed to a turbine, which meshes with the adjacent worm.

[0010] Preferably, the cleaning machine is equipped with a servo motor, and a sprocket is provided on the output shaft of the servo motor. Sprockets on two vertically arranged straight rods are connected to sprocket one through a chain.

[0011] Preferably, an auxiliary rotating frame is fixedly connected to the movable wheel, the auxiliary rotating frame is connected to the corresponding sliding frame, and friction strips are provided on the outer periphery of the auxiliary rotating frame.

[0012] Preferably, the cleaning structure includes multiple guide rods fixed to the rear end of the cleaning machine, a connecting frame slidably connected to the multiple guide rods, a rotating ring on the connecting frame, a drive motor on the cleaning machine, a rotating shaft on the output shaft of the drive motor, two mounting seats on the rotating shaft, a rotating rod hinged to each mounting seat, both rotating rods being hinged to the rotating ring via the connecting rod, a brush and a scraper respectively mounted on the free ends of the two rotating rings, and torsion springs are provided between the brush, the scraper and the corresponding rotating rod.

[0013] Preferably, the rotating ring is provided with a movable frame, and the cleaning machine is provided with multiple positioning frames. The movable frame is slidably connected to the multiple positioning frames. The sliding frame is provided with a rack, the support frame is provided with a fixed rod, the fixed rod is provided with a rotating screw, the rotating screw is provided with a gear, the gear meshes with the adjacent rack, and the movable frame is threadedly connected to the corresponding rotating screw.

[0014] Preferably, the cleaning machine is provided with multiple water outlet pipes, each water outlet pipe is provided with a protective shell, the protective shell is provided with a second nozzle, the second nozzle is provided with a second gear, and the connecting frame is provided with multiple rack frames, the rack frames meshing with the second gear.

[0015] Beneficial effects: This device forms an integrated cleaning process of scraping, flushing, and draining through the synergistic effect of the front-end annular water jet flushing and the rear-end cleaning structure. The wheel assembly structure can automatically adjust the support radius according to the inner diameter of the pipe, ensuring that the device can maintain stable operation in a centered position under different pipe diameter conditions, avoiding uneven wear, jamming, or poor sealing, thereby improving dredging efficiency and equipment adaptability.

[0016] Through the linkage of the sliding frame, rack and pinion, gear, rotating screw, moving frame, rotating ring, connecting frame, and connecting rod, the rotating rod is driven to open outward or retract inward, so that the working radius of the brush and scraper automatically adjusts with the change of pipe diameter. Under the continuous compression of the torsion spring, the brush and scraper are always in close contact with the inner wall surface of the current pipe diameter. Thus, while the cleaning machine moves along the pipe, the brush and scraper perform all-round and efficient scraping and cleaning of the inner wall of the pipe in an adaptive contact state. This achieves a high degree of synergy between wheel support, walking stability, and cleaning and contact, significantly improving the versatility and cleaning efficiency of the device in variable diameter or non-standard pipes.

[0017] When the connecting frame moves radially, the rack frame moves synchronously. Through the meshing of the rack frame and gear two, the spray head two is driven to rotate around its axis, adjusting the spray angle in real time. This linkage mechanism ensures that the spray direction of the spray head two is always matched with the current pipe diameter and the actual position of the brush and scraper. This allows some of the spray head two to spray cleaning fluid directionally onto the working surface of the brush and scraper, dynamically rinsing their surfaces, effectively removing attached dirt, and maintaining their cleanliness and scraping efficiency. The remaining spray head two sprays cleaning fluid precisely onto the inner wall of the pipe, working in conjunction with the annular water column formed by the front spray head one. During the reciprocating movement of the cleaning machine 1, it achieves multi-point, multi-directional, and full-coverage rinsing of the pipe wall, thereby achieving a dredging effect. Attached Figure Description

[0018] Figure 1 : A three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 : A partial structural schematic diagram of the present invention;

[0020] Figure 3 : A schematic diagram of the structure of the servo motor, sprocket, chain, and other components of this invention;

[0021] Figure 4 : A schematic diagram of the structure of the nozzle 2, sprocket 2, protective shell and other components of the present invention;

[0022] Figure 5 : A schematic diagram of the cleaning structure of this invention;

[0023] Figure 6 : A schematic diagram of the structure of the gear, rack, and lead screw of the present invention;

[0024] Figure 7 : A schematic diagram of the structure of the rack frame, gear 2, connecting frame and other components of this invention;

[0025] In the diagram: 1-Washing machine, 101-Spray head one, 102-Connecting water pipe, 103-Straight rod, 11-Support frame, 12-Sliding frame, 13-Moving wheel, 14-Connecting spring, 15-Auxiliary rotating frame, 16-Servo motor, 17-Sprocket one, 18-Chain, 19-Adjusting screw, 110-Wheel drive, 111-Worm gear, 112-Outlet pipe, 113-Spray head two, 114-Sprocket two, 115 1-Protective shell, 2-Drive motor, 21-Rotating shaft, 22-Rotating rod, 23-Connecting rod, 24-Brush, 25-Torsion spring, 26-Scraper, 27-Rotating ring, 28-Moving frame, 29-Fixing rod, 210-Gear 1, 211-Rack 1, 212-Rotating screw, 213-Connecting frame, 214-Mounting base, 215-Positioning frame, 216-Guide rod, 3-Rack frame, 31-Gear 2. Detailed Implementation

[0026] Next, combine Figures 1-7 A specific embodiment of the present invention will be described in detail below.

[0027] refer to Figure 1 and Figure 2 A waste gas pipeline unblocking device includes a cleaning machine 1, which is a cylindrical structure with an internal cavity for containing cleaning fluid. Under the driving action, it reciprocates along the pipeline axis to complete the continuous unblocking and cleaning of the pipeline inner wall. The front end of the cleaning machine 1 is equipped with an electrically controlled nozzle 101 and a connecting water pipe 102 connected to it. The connecting water pipe 102 is connected to an external liquid source for replenishing the cleaning fluid into the inner cavity of the cleaning machine 1. The nozzle 101 can spray the cleaning fluid in the cavity at high speed in the form of an annular water column to achieve full coverage flushing of the pipeline cross section, effectively flushing and carrying the dirt forward for discharge.

[0028] refer to Figure 1 The cleaning machine 1 is equipped with a cleaning structure at the rear end. The cleaning structure and the nozzle 101 are symmetrically arranged at both ends of the cleaning machine 1. It is used to mechanically scrape off the deposits on the inner wall of the pipe during the reciprocating movement of the cleaning machine 1. Through the rinsing of the front annular water column and the synergistic effect of the rear cleaning structure, an integrated cleaning process of scraping, rinsing and draining is formed.

[0029] In addition, the outer wall of the cleaning machine 1 is equipped with a controlled adjustable wheel structure. This wheel structure can automatically adjust the support radius according to the inner diameter of the pipe, ensuring that the device can maintain stable operation in a centered position under different pipe diameter conditions, avoiding uneven wear, jamming or poor sealing, thereby improving the dredging efficiency and equipment adaptability.

[0030] refer to Figures 1-4The wheel assembly structure includes eight symmetrical support frames 11 fixed to the outer wall of the cleaning machine 1. Each support frame 11 is slidably connected to a sliding frame 12. A self-driven moving wheel 13 is rotatably mounted on the top of the sliding frame 12. The support frames 11, sliding frames 12, and moving wheels 13 together form an independent support leg unit. The eight support leg units are evenly distributed in a circle. By synchronously adjusting the extension length of each sliding frame 12, the moving wheel 13 is driven to move radially outward, thereby adaptively conforming to the inner wall of pipes with different inner diameters and achieving stable central support. The moving wheel 13 rolls in contact with the pipe wall during movement, significantly reducing frictional resistance. A connecting spring 14 is provided between the sliding frame 12 and the support frame 11 to provide a restoring force and absorb the impact and vibration during operation, ensuring conformability and structural reliability.

[0031] refer to Figure 3 and Figure 4 To achieve synchronous telescopic adjustment of the sliding frame 12, each sliding frame 12 is threaded with an adjusting screw 19. The two adjusting screws 19 arranged opposite each other are fixed by a straight rod 103. The four straight rods 103 are arranged in a cross shape in the inner cavity of the cleaning machine 1. The outer walls of the two vertically arranged straight rods 103 are respectively keyed with worm gears 111 and sprockets 114. The outer walls of the two horizontally arranged straight rods 103 are respectively keyed with turbines 110. Each turbine 110 meshes with its adjacent worm gear 111 to form a worm gear transmission pair, realizing the power transmission and steering linkage between the vertical and horizontal straight rods 103.

[0032] refer to Figure 3 The rotation of the four straight rods 103 is controlled by a single drive source: a servo motor 16 is installed on the outer wall of the cleaning machine 1, the output shaft of the servo motor 16 extends into the inner cavity of the cleaning machine 1 and is keyed to a sprocket 17, and the sprockets 114 on the two vertically arranged straight rods 103 are connected to the sprocket 17 via a chain 18.

[0033] In the initial state, the sliding frame 12 is in the retracted low position, and the self-drive system of the moving wheel 13 is in the off state. Before operation, the water pipe 102 is connected to the external liquid source to inject cleaning fluid into the inner cavity of the cleaning machine 1. Then, the cleaning machine 1 is placed into the pipe to be cleaned, with the wheel assembly structure facing the direction of travel. The servo motor 16 is started to drive the first sprocket 17 to rotate. The chain 18 drives the second sprocket 114 and the two vertically arranged straight rods 103 to rotate synchronously. The worm gear 111 on the two vertically arranged straight rods 103 rotates accordingly, driving the worm gear 110 meshing with it, which in turn drives the two horizontally arranged straight rods 103 to rotate in the opposite direction. The rotation of the four straight rods 103 causes the eight adjusting screws 19 to rotate synchronously, pushing each sliding frame 12 to extend radially outward along the support frame 11, causing the moving wheel 13 to fit tightly against the inner wall of the pipe. The connecting spring 14 is compressed accordingly and provides cushioning. Thus, the eight support leg structures extend synchronously, achieving adaptive, stable, and centered support for different pipe diameters.

[0034] Subsequently, the self-drive system of the moving wheel 13 is activated. The moving wheel 13 rotates, driving the cleaning machine 1 to move along the pipe axis. The cleaning structure scrapes and cleans the inner wall of the pipe. The electrically controlled nozzle 101 at the front end sprays the cleaning liquid in the form of a ring water column at high speed, fully covering the cross-section of the pipe, efficiently flushing the dirt on the inner wall and carrying the stripped material forward to complete the pipe dredging and cleaning operation.

[0035] To overcome the problem of slippage caused by insufficient friction of the moving wheel 13 in the wheel assembly structure when traveling on a smooth or clean area of ​​the pipe inner wall, refer to Figure 2 An auxiliary rotating frame 15 is fixedly connected to the moving wheel 13. The auxiliary rotating frame 15 is rotatably connected to the corresponding sliding frame 12. The outer periphery of the auxiliary rotating frame 15 is provided with a friction strip with a high coefficient of friction. The friction strip always keeps in contact with the inner wall of the pipe and provides additional frictional resistance during the rotation of the moving wheel 13 of the wheel assembly structure. This effectively improves the driving stability, prevents idling or slippage, and ensures that the cleaning machine 1 can move reliably under various pipe wall conditions.

[0036] At the same time, refer to Figure 5 and Figure 6To achieve efficient removal of deposits from the inner wall of the pipe, the cleaning structure on the outer rear end of the cleaning machine 1 includes multiple guide rods 216 fixed to the rear end of the cleaning machine 1. A connecting frame 213 is slidably connected to the multiple guide rods 216, and a rotating ring 27 is transferred onto the connecting frame 213. The connecting frame 213 serves as a receiving platform for the rotating ring 27. A drive motor 2 is also installed at the rear end of the cleaning machine 1. The output shaft of the drive motor 2 is keyed to a rotating shaft 21, and two symmetrically distributed mounting brackets are fixed on the rotating shaft 21. Mounting base 214, each mounting base 214 is hinged with a rotating rod 22, and both rotating rods 22 are hinged to rotating rings 27 via connecting rods 23. The free ends of the two rotating rings 27 are respectively equipped with brushes 24 and scrapers 26. Torsion springs 25 are provided between the brushes 24, scrapers 26 and the corresponding rotating rods 22. The elastic force of the torsion springs 25 is used to keep the brushes 24 and scrapers 26 in close contact with the inner wall of the pipe, so as to achieve simultaneous brushing of dirt and mechanical scraping of hard deposits during rotation.

[0037] After the drive motor 2 starts, it drives the rotating shaft 21 to rotate, which in turn drives the brush 24 and scraper 26 to revolve around the axis of the cleaning machine 1 and swing adaptively through the rotating rod 22. At the same time, the connecting rod 23 drives the rotating ring 27 to rotate synchronously, forming a stable linkage.

[0038] Considering that the wheel assembly structure needs to adapt to the pipe diameter for expansion and contraction, and that the brush 24 and scraper 26 also need to adjust their radial positions synchronously to maintain effective contact with the inner walls of different pipe diameters, this device is designed with a mechanical linkage mechanism to achieve coordinated adjustment between the two: a movable frame 28 is rotatably connected to the rotating ring 27, and multiple positioning frames 215 are fixedly connected to the outer wall of the cleaning machine 1. The movable frame 28 is slidably connected to the multiple positioning frames 215, allowing only axial translation without affecting the rotational freedom of the rotating ring 27.

[0039] Furthermore, a rack 211 is fixedly connected to the outer wall of the sliding frame 12, and a fixed rod 29 is fixedly connected to the outer wall of the support frame 11. A rotating screw 212 is threadedly connected to the fixed rod 29, and a gear 210 is keyed to the end of the rotating screw 212. The gear 210 meshes with the adjacent rack 211. At the same time, the movable frame 28 is threadedly connected to the corresponding rotating screw 212.

[0040] When the cleaning machine 1 enters pipes of different diameters and the wheel assembly structure begins to adjust, the sliding frame 12 extends radially outward along the support frame 11, driving the rack 211 to move synchronously, driving the gear 210 meshing with it to rotate, and then driving the rotating screw 212 to rotate. The rotation of the rotating screw 212 is converted into the axial displacement of the moving frame 28 along the positioning frame 215 through the threaded pair. Since the moving frame 28 is rotatably connected to the rotating ring 27, its axial movement can directly push the rotating ring 27 and the connecting frame 213 to move as a whole. Through the transmission of the connecting rod 23, this displacement further drives the two rotating rods 22 to open outward or close inward, so that the working radius of the brush 24 and the scraper 26 is automatically adjusted according to the change of pipe diameter. Under the continuous pressing action of the torsion spring 25, the brush 24 and the scraper 26 are always closely attached to the inner wall surface of the current pipe diameter.

[0041] Thus, while the cleaning machine 1 moves along the pipeline, the drive motor 2 continues to run, and the brush 24 and scraper 26 scrape and clean the inner wall of the pipeline in an all-round and efficient manner in an adaptive fit state. This achieves a high degree of synergy between wheel support, stable walking, and cleaning fit, significantly improving the versatility and cleaning efficiency of the device in variable diameter or non-standard pipelines.

[0042] refer to Figure 7 To prevent the brush 24 and scraper 26 from reducing cleaning efficiency or causing secondary pollution due to dirt adhesion during operation, this device integrates an adaptive rinsing system at the rear end of the cleaning machine 1: multiple water outlet pipes 112 are connected through the rear end of the cleaning machine 1, and a protective shell 115 is fixedly connected to the top of each water outlet pipe 112. A second nozzle 113 is rotatably connected inside the protective shell 115. A gear 31 located on the outer wall of the protective shell 115 is keyed to the end of the adapter shaft of the second nozzle 113. Correspondingly, multiple rack frames 3 are fixedly connected to the connecting frame 213, and each rack frame 3 corresponds to and meshes with the second gear 31.

[0043] When the wheel assembly adjusts according to the pipe diameter and drives the connecting frame 213 to move radially, the rack frame 3 moves synchronously. Since the rack frame 3 meshes with the gear 2 31, its linear motion is converted into the rotational motion of the gear 2 31, which in turn drives the nozzle 2 113 to rotate around its axis, adjusting the spray angle in real time. This linkage mechanism ensures that the spray direction of the nozzle 2 113 is always matched with the current pipe diameter and the actual positions of the brush 24 and scraper 26.

[0044] During the rotation of the brush 24 and scraper 26 driven by the drive motor 2, some nozzles 113 spray cleaning fluid directionally onto the working surfaces of the brush 24 and scraper 26, dynamically rinsing their surfaces to effectively remove attached dirt and maintain their cleanliness and scraping efficiency. The remaining nozzles 113 precisely spray cleaning fluid onto the inner wall of the pipe, working in conjunction with the annular water column formed by the front nozzle 101 to achieve multi-point, multi-directional, and full-coverage rinsing of the pipe wall during the reciprocating movement of the cleaning machine 1, thereby achieving a dredging effect. This design not only improves cleaning efficiency but also avoids the degradation of cleaning performance caused by tool contamination, significantly enhancing the machine's continuous operation capability and dredging reliability under complex working conditions.

[0045] Given that this device operates in a high-humidity, highly corrosive, and particulate-containing pipeline environment, to ensure long-term reliability and safety, both the servo motor 16 and the drive motor 2 adopt a high-level protection design and are equipped with splash guards and heat dissipation isolation structures to effectively prevent cleaning fluid splashing, dirt intrusion, and steam penetration. At the same time, all transmission components, including the chain 18, sprocket 17, key wheel 114, worm gear 111, turbine 110, adjusting screw 19, gear 210, rack 211, lead screw 212, connecting rod 23, and rotating shaft 21, are equipped with targeted protection measures. Exposed threads and sliding mating surfaces are equipped with dust-proof scraper rings or elastic sealing covers. The surfaces of metal parts are treated with anti-corrosion measures such as nickel plating, passivation, or spraying with chemical corrosion-resistant coatings, and are reasonably arranged in the inner cavity of the cleaning machine 1 or in the protected cavity to avoid direct contact with cleaning fluid and dirt. The above comprehensive protection strategy significantly improves the durability, stability, and maintenance cycle of the whole machine under harsh working conditions.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A waste gas pipeline unblocking device, comprising a cleaning machine (1), characterized in that: The cleaning machine (1) is equipped with an electrically controlled nozzle (101) and a through-connected water pipe (102). The water pipe (102) is connected to an external liquid source. The cleaning machine (1) is equipped with a cleaning structure and a controllable wheel assembly structure.

2. The waste gas pipeline unblocking device according to claim 1, characterized in that: The wheel assembly structure includes eight symmetrical support frames (11) fixed to the outer wall of the cleaning machine (1). Each support frame (11) is equipped with a sliding frame (12), and the sliding frame (12) is equipped with a moving wheel (13). A connecting spring (14) is provided between the sliding frame (12) and the support frame (11).

3. The waste gas pipeline unblocking device according to claim 2, characterized in that: Each sliding frame (12) is provided with an adjusting screw (19). The two adjusting screws (19) arranged opposite each other are fixedly connected by a straight rod (103). The outer walls of the two vertically arranged straight rods (103) are respectively keyed to a worm (111) and a sprocket (114). The outer walls of the two horizontally arranged straight rods (103) are respectively keyed to a turbine (110). The turbine (110) meshes with the worm (111) next to it.

4. The waste gas pipeline unblocking device according to claim 2, characterized in that: The cleaning machine (1) is equipped with a servo motor (16), and a sprocket (17) is provided on the output shaft of the servo motor (16). The sprockets (114) on the two vertically arranged straight rods (103) are connected to the sprockets (17) via a chain (18).

5. The waste gas pipeline unblocking device according to claim 2, characterized in that: An auxiliary rotating frame (15) is fixedly connected to the moving wheel (13). The auxiliary rotating frame (15) is connected to the corresponding sliding frame (12). Friction strips are provided on the outer periphery of the auxiliary rotating frame (15).

6. The waste gas pipeline unblocking device according to claim 4, characterized in that: The cleaning structure includes multiple guide rods (216) fixed to the rear end of the cleaning machine (1). A connecting frame (213) is slidably connected to the multiple guide rods (216). A rotating ring (27) is provided on the connecting frame (213). A drive motor (2) is provided on the cleaning machine (1). A rotating shaft (21) is provided on the output shaft of the drive motor (2). Two mounting seats (214) are provided on the rotating shaft (21). A rotating rod (22) is hinged on each mounting seat (214). Both rotating rods (22) are hinged to the rotating ring (27) through the connecting rod (23). A brush (24) and a scraper (26) are respectively installed on the free ends of the two rotating rings (27). A torsion spring (25) is provided between the brush (24), the scraper (26) and the corresponding rotating rod (22).

7. The waste gas pipeline unblocking device according to claim 6, characterized in that: The rotating ring (27) is provided with a movable frame (28), and the cleaning machine (1) is provided with multiple positioning frames (215). The movable frame (28) is slidably connected to the multiple positioning frames (215). The sliding frame (12) is provided with a rack (211), the support frame (11) is provided with a fixed rod (29), the fixed rod (29) is provided with a rotating screw (212), the rotating screw (212) is provided with a gear (210), the gear (210) meshes with the adjacent rack (211), and the movable frame (28) is threadedly connected to the corresponding rotating screw (212).

8. The waste gas pipeline unblocking device according to claim 7, characterized in that: The cleaning machine (1) is provided with multiple water outlet pipes (112), and a protective shell (115) is provided on the water outlet pipes (112). A second nozzle (113) is provided on the protective shell (115), and a second gear (31) is provided on the second nozzle (113). Multiple rack frames (3) are provided on the connecting frame (213), and the rack frames (3) mesh with the second gear (31).

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