Self-propelled pipe pig

Abstract

The utility model provides a kind of self-propelled pipeline dirt scraping device, including drive box, advance wheel and water spray tank, motor and speed reducer are installed in drive box, speed reducer is fixedly connected in drive box by bolt, the output shaft of speed reducer is connected with the shaft after passing through the rear end surface of drive box, and cleaning assembly is fixedly connected on the outer lateral wall of the shaft;Advance wheel is fixed in the outer lateral wall of fixed ring I by fixed seat circumference, and fixed ring I is fixedly connected on the outer lateral wall of the shaft by bolt;Adjustable assembly is provided in fixed seat;Rotary spray head is installed on the front end surface of water spray tank by thread cooperation.The utility model, by setting adjustable assembly, staff can change the depth of insertion of adjusting plate and cooperate with dowel pin fixed, flexibly adjust advance wheel height, adapt to different pipe diameter pipeline, without purchasing special propulsion component, reduce equipment cost, and when responding to the condition that pipe diameter is variable, without disassembling device whole, improve operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of pipe dirt cleaning technology, specifically a self-propelled pipe dirt scraping device. Background Technology

[0002] As a core infrastructure in fluid transportation, industrial production, and municipal construction, pipelines are prone to accumulating scale, rust, biofilm, and various impurities on their inner walls after long-term use. This fouling not only narrows the pipe's inner diameter and increases fluid transport resistance, leading to increased energy consumption, but it can also breed bacteria, corrode the pipe's inner wall, shorten its lifespan, and even cause blockages and ruptures. In severe cases, it can affect the continuity of industrial production or the normal operation of public services such as municipal water supply and drainage. Therefore, regular cleaning of the pipeline's inner walls is crucial.

[0003] A search revealed that application CN202411288055.7 discloses a cleaning device for chemical pipelines, comprising: a frame and a moving component. The moving component drives the frame to move within the pipeline. A rotating ring and a drive source for rotating the rotating ring are mounted on the frame. A cutting component is located at the front end of the rotating ring. The moving component controls the rotating ring to rotate as the frame moves forward, thereby causing the cutting component to cut spiral grooves on the dirt on the inner wall of the pipeline. The cleaning component includes two spiral blades, forming spiral grooves between the spiral blades and the rotating ring, and forming an soaking tank between the two spiral grooves. The rotating ring is provided with an outlet for injecting cleaning fluid into the soaking tank. The cutting component is located on the spiral extension line of the left spiral blade. When the frame moves forward, the spiral blade rotates and moves forward within the spiral grooves. The cleaning component includes a scraper. When the rotating ring rotates, the scraper scrapes away the dirt on the inner wall of the pipeline. This invention can improve the efficiency of cleaning fluid use.

[0004] However, the aforementioned device has a fixed height for its moving components, making it impossible to flexibly adjust according to changes in pipe diameter. This incompatibility with pipes of different diameters not only increases equipment procurement costs but also affects the efficiency of pipe cleaning operations. Furthermore, the fixed-height moving components struggle to adapt to pipes with slight diameter variations, leading to issues such as insufficient propulsion due to loose contact between the moving components and the pipe wall, or excessive contact causing wear and scratches on the pipe wall. This reduces the device's adaptability to different pipe diameters and its operational stability. Utility Model Content

[0005] The purpose of this invention is to provide a self-propelled pipe dirt scraping device to solve the problems mentioned in the background art.

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

[0007] A self-propelled pipe descaling device, comprising:

[0008] The drive box contains a motor and a reducer. The reducer is fixedly connected to the drive box by bolts. The output shaft of the reducer passes through the rear end face of the drive box and is connected to the rotating shaft. When the motor is running, the speed and torque are increased by the reducer, which drives the rotating shaft to rotate. A cleaning component is fixedly connected to the outer wall of the rotating shaft, which cleans the inner wall of the pipe as the rotating shaft rotates.

[0009] The forward wheel is circumferentially fixed to the outer wall of the fixed ring I by a fixed seat. The axis of the forward wheel is at an angle to the axis of the fixed seat. The fixed ring I is fixedly connected to the outer wall of the rotating shaft by bolts. The rotating shaft is driven by a motor and a reducer to rotate the fixed ring I synchronously. The fixed ring I then drives the fixed seat on the outer wall and the forward wheel to move together, so that the forward wheel generates rolling friction on the inner wall of the pipe. The friction force drives the entire device to move forward along the axis of the pipe.

[0010] The fixed base is equipped with an adjustable component for adjusting the height of the forward wheel to adapt to pipes of different diameters;

[0011] The water tank has a rotating nozzle installed on its front end via a threaded connection. The nozzle sprays water evenly onto the inner wall of the pipe through its angled outlet, which, together with the cleaning components, achieves pre-softening of dirt and rinsing of residual dirt after scraping.

[0012] Preferably, the adjustable component includes a damper and an adjusting base. The piston rod of the damper is fitted with a compression spring. The top of the piston rod and the compression spring are fixedly connected to the lower end face of the adjusting base. The upper end face of the fixed base has a mounting groove adapted to the adjusting base. The bottom of the damper is fixedly connected to the bottom of the mounting groove of the fixed base.

[0013] Preferably, a guide strip is fixedly installed on one side of the inner wall of the mounting groove, and a limiting groove adapted to the guide strip is opened on the side of the adjusting base facing the guide strip. The position of the guide strip corresponds to both sides of the limiting groove, and a preset space is left in the middle of the guide strip to avoid the positioning pin on the front of the adjusting base.

[0014] Preferably, multiple adjustment holes are evenly opened in the vertical direction in the limiting groove, and an adjustment plate is movably inserted into the adjustment base. A wheel frame is fixedly connected to the top of the adjustment plate, and the forward wheel is rotatably connected to the wheel frame through a pin. A through hole adapted to the adjustment hole is opened on the bottom front face of the adjustment plate. By changing the depth of the adjustment plate inserted into the adjustment base, the through hole of the adjustment plate is aligned with the adjustment holes of different heights in the limiting groove. Then, the positioning pin is inserted into the aligned adjustment hole and the through hole of the adjustment plate in sequence to realize the fixed adjustment of the height of the forward wheel, thereby adapting to pipes of different diameters.

[0015] Preferably, the cleaning assembly includes a scraper, a slot plate, and a fixing ring II. The fixing ring II is fixedly connected to the outer wall of the rotating shaft by bolts, and the slot plate is uniformly fixedly connected to the outer wall of the fixing ring II along the circumferential direction. The scraper is inserted into the slot of the slot plate. Both the bottom of the scraper and the bottom of the slot plate have through holes with matching diameters. The fixing bolts are passed through the through holes at the bottom of the scraper and the bottom of the slot plate in sequence, and then the fixing nuts are screwed in and tightened to achieve a stable connection between the scraper and the slot plate.

[0016] Preferably, a water storage tank is fixedly connected inside the water spray tank. The top of the water storage tank is provided with a water inlet. The water inlet extends vertically upward through the top of the water spray tank and extends to the outside of the water spray tank. The outer wall of the water inlet is provided with external threads and is covered by a threaded water inlet cap with internal threads to achieve sealing of the water storage tank.

[0017] Preferably, the water tank has an outlet on its front side, and a water pump is fixedly installed at the outlet, with the water pump's outlet end connected to the outlet. The end of the outlet away from the water tank passes through the tank cover II on the front face of the spray tank and extends to the outside of the spray tank. The outer wall of the top of the outlet extending to the outside of the spray tank has an external thread, which is threaded to the inner wall of the base of the rotating nozzle. The rotating nozzle and its base are rotatably connected. The rotating nozzle has a spray section evenly distributed around its side, and an oblique outlet is provided on the spray section. When the water pump is started, it delivers the liquid in the water tank to the outlet. The liquid flows into the rotating nozzle through the outlet and then sprays out from the oblique outlet. The reaction force generated by the liquid sprayed out from the oblique outlet drives the rotating nozzle to rotate around its base, thereby evenly spraying liquid around the inner wall of the pipe. This, in conjunction with the cleaning components, achieves pre-softening of dirt and rinsing of residual dirt after scraping.

[0018] Preferably, a power supply I for supplying power to the motor and reducer is fixedly connected to the inner wall of the drive box. The power supply I is a replaceable battery power supply. The drive box is equipped with a detachable cover I by bolts to facilitate the removal and replacement of the power supply I. At the same time, a power supply II for supplying power to the water pump is fixedly connected to the inner wall of the water tank. The power supply II is also a replaceable battery structure.

[0019] Preferably, a bracket is uniformly fixedly connected to the outer side wall of the drive box along the circumferential direction of the outer side wall, and a collision-resistant wheel is rotatably connected to the top of the bracket.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] This invention, by setting a forward wheel with a preset angle and a fixed ring I, allows the forward wheel to generate a component force along the axial direction with the inner wall of the pipe when it rotates with the shaft, driving the device to move forward autonomously without the need for external traction equipment and without being limited by the length of the traction rope. It can penetrate deep into the interior of long straight pipes to complete the entire cleaning process, expanding the cleaning range and reducing interference from external equipment.

[0022] This invention, by setting an adjustable component including a damper, an adjusting base, an adjusting plate, and a positioning pin, allows workers to flexibly adjust the height of the forward wheel by changing the insertion depth of the adjusting plate and fixing it with the positioning pin, adapting to pipes of different diameters. It eliminates the need to purchase special propulsion components, reducing equipment costs, and improves work efficiency by eliminating the need to disassemble the entire device when dealing with varying pipe diameters on site.

[0023] This invention features a rotating nozzle with an angled outlet. After the water pump delivers cleaning fluid to the rotating nozzle, the reaction force generated by the spray from the angled outlet drives the nozzle to rotate, achieving uniform circumferential spraying of the inner wall of the pipe. This eliminates the need for multi-directional fixed nozzles and complex branch pipes, simplifying the structure, reducing maintenance costs and the weight and volume of the device, and making it more suitable for operation in narrow pipes. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This utility model Figure 1 Another perspective 3D illustration;

[0026] Figure 3 This is a three-dimensional schematic diagram of the drive box of this utility model;

[0027] Figure 4 This is a three-dimensional schematic diagram showing the connection between the motor, reducer, cleaning components, and forward wheel of this utility model;

[0028] Figure 5 This is a three-dimensional schematic diagram of the detachable scraper structure of this utility model;

[0029] Figure 6 This is a three-dimensional schematic diagram of the adjustable components inside the forward wheel protective shell of this utility model;

[0030] Figure 7 This is a three-dimensional schematic diagram of the adjustable component of this utility model;

[0031] Figure 8 This is a three-dimensional schematic diagram of the rotating nozzle and water tank of this utility model.

[0032] In the diagram: 1. Drive box; 101. Box cover I; 102. Power supply I; 2. Brake; 201. Anti-collision wheel; 3. Forward wheel; 301. Wheel frame; 302. Fixed seat; 303. Fixed ring I; 304. Adjustable base; 305. Guide strip; 306. Limit groove; 307. Adjustment hole; 308. Positioning pin; 309. Compression spring; 310. Damper; 311. Adjusting plate; 4. Scraper; 401. Slot plate; 402. Fixing bolt; 403. Fixing nut; 404. Fixed ring II; 5. Water tank; 501. Box cover II; 502. Water inlet; 503. Water outlet cover; 504. Water storage tank; 505. Power supply II; 506. Water pump; 507. Rotary nozzle; 508. Angled water outlet; 6. Motor; 7. Reducer; 8. Shaft. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example:

[0035] Please see Figures 1 to 8 This utility model provides a technical solution:

[0036] A self-propelled pipe fouling removal device includes a drive box 1, a forward wheel 3, a cleaning component and a water spray box 5, which realizes automated and efficient removal of fouling from the inner wall of pipes.

[0037] Inside the drive housing 1, a motor 6 and a reducer 7 are securely mounted with bolts, forming a coordinated transmission structure. The reducer 7 serves as a power adjustment component, and its output shaft passes through the rear end face of the drive housing 1 (e.g., Figure 4 As shown, the motor 6 is coaxially connected to the rotating shaft 8 at the center of the device. When the motor 6 starts running, the high-speed, low-torque power output is converted into low-speed, high-torque power that meets the needs of pipeline cleaning after being processed by the speed reducer 7, and is precisely transmitted to the rotating shaft 8 to drive the rotating shaft 8 to rotate stably.

[0038] It should be noted that the two sides of the rotating shaft 8 are connected to the drive box 1 and the water spray box 5 respectively through bearings. The inner ring of the bearing is tightly fitted with the rotating shaft 8 and rotates synchronously with the rotating shaft 8, while the outer ring is fixedly connected to the inner wall of the drive box 1 and the water spray box 5 respectively. This reduces the swaying amplitude of the drive box 1 and the water spray box 5 when the rotating shaft 8 is driven by the motor 6 and the reducer 7, ensuring that the entire device maintains a stable traveling posture in the pipeline and does not affect the normal operation of the cleaning and propulsion functions.

[0039] The drive box 1 has a power supply I102 fixedly connected to its inner wall. This power supply uses a replaceable battery structure and can provide stable power to the motor 6 and the reducer 7. Meanwhile, a removable cover I101 is bolted to the side wall of the drive box 1, allowing operators to quickly replace the power supply I102 by removing the cover I101, preventing work interruptions due to power depletion. Furthermore, four supports 2 are evenly distributed along the circumference of the outer wall of the drive box 1. Each support 2 has a rotatable anti-collision wheel 201 at its top. When the device travels inside the pipe, the anti-collision wheel 201 can flexibly contact the inner wall of the pipe, reducing direct friction loss between the drive box 1 and the pipe wall, and preventing the device from getting stuck or shifting due to protrusions or impurities on the inner wall of the pipe, thus ensuring overall stability.

[0040] The cleaning assembly includes a scraper 4, a slot plate 401, and a retaining ring II 404. The retaining ring II 404 is tightly fixed to the outer wall of the rotating shaft 8 by bolts, serving as the mounting base for the cleaning assembly. The slot plates 401 are evenly distributed along the circumference of the retaining ring II 404 and are welded and fixed (e.g., ...). Figure 2 As shown, the slot structure of the slot plate 401 precisely matches the shape of the scraper 4, allowing the scraper 4 to be directly inserted into the slot for initial positioning. To ensure that the scraper 4 does not loosen during high-speed rotation, both the bottom of the scraper 4 and the bottom of the slot plate 401 have through holes of the same diameter. The operator only needs to pass the fixing bolt 402 through the two sets of through holes in sequence, and then screw in the fixing nut 403 and tighten it to complete the rigid fixation of the scraper 4 and the slot plate 401.

[0041] In this embodiment, during operation, the rotating shaft 8 drives the fixing ring II 404, the slot plate 401 and the scraper 4 to rotate synchronously. The edge of the scraper 4 is in close contact with the inner wall of the pipe. The mechanical force generated by the rotation powerfully scrapes away scale, rust, biofilm and other dirt on the inner wall of the pipe. At the same time, for pipes of different diameters or dirt of different thicknesses, scrapers 4 of different heights and materials (such as stainless steel scrapers 4 for hard scale and polyurethane scrapers 4 for soft scale) can be quickly replaced by disassembling the fixing bolts 402 and nuts, which greatly improves the cleaning adaptability of the device.

[0042] The forward wheel 3 is circumferentially distributed on the outer wall of the fixed ring I 303 via the fixed seat 302. The fixed ring I 303 is fixed to the outer wall of the rotating shaft 8 by bolts and rotates synchronously with the rotating shaft 8. The axis of the forward wheel 3 is at a preset angle (usually 15°-30°) with the axis of the fixed seat 302 (e.g., Figure 4As shown, the forward wheel 3 generates a component force along the pipe axis when rotating against the inner wall of the pipe. When the rotating shaft 8 drives the fixed ring I 303 to rotate, the fixed ring I 303 further drives the fixed seat 302 to move synchronously with the forward wheel 3. The forward wheel 3 forms rolling friction on the inner wall of the pipe, and the friction drives the entire device to move stably along the pipe axis without the need for external traction equipment. Since the device does not rely on external traction equipment, it can move autonomously along the pipe axis by the rolling friction between its own forward wheel 3 and the inner wall of the pipe. It is not limited by the length of the external traction rope and can go deep into the interior of long straight pipes to complete the entire cleaning operation. This avoids the problem of limited cleaning range caused by the limited traction distance of traditional traction cleaning equipment. At the same time, the autonomous movement mode also reduces the occupation and interference of external equipment on the pipe port, further improving the convenience and completeness of cleaning operations on long straight pipes.

[0043] Since the pipe diameter varies in different scenarios (such as the common DN100-DN500 specification for municipal pipes), the fixed seat 302 is equipped with an adjustable component to flexibly adjust the height of the forward wheel 3 to adapt to different pipe diameters.

[0044] The adjustable components include a damper 310, an adjusting base 304, an adjusting plate 311, and a positioning pin 308 (e.g., Figure 6 As shown), the upper end face of the fixed base 302 is provided with an installation groove that is compatible with the adjusting base 304. The bottom of the damper 310 is fixed in the bottom of the installation groove. The piston rod is sleeved with a compression spring 309. The piston rod and the top of the compression spring 309 are connected to the lower end face of the adjusting base 304. The elastic deformation of the spring can buffer the contact pressure between the forward wheel 3 and the inner wall of the pipe, avoiding wheel wear or pipe scratches caused by hard contact.

[0045] A vertically extending guide strip 305 is fixed to one side of the inner wall of the mounting groove (e.g., Figure 6 As shown), the corresponding surface of the adjusting base 304 has a matching limiting groove 306. The cooperation between the guide strip 305 and the limiting groove 306 can limit the lateral displacement of the adjusting base 304. The guide strip 305 has a reserved space in the middle to avoid the positioning pin 308 on the front of the adjusting base 304 and prevent the components from interfering.

[0046] The adjusting plate 311 is movably inserted into the adjusting base 304, and a wheel frame 301 is fixedly connected to its top. The forward wheel 3 is rotatably mounted in the wheel frame 301 via a pin. Multiple adjusting holes 307 are evenly opened in the vertical direction in the limiting groove 306 (e.g., ...). Figure 7 As shown), the bottom front end face of the adjustment plate 311 has a through hole with the same diameter as the adjustment hole 307.

[0047] In this embodiment, when different pipe diameters need to be accommodated, the operator can adjust the depth of the adjusting plate 311 inserted into the adjusting base 304 according to the required pipe diameter, aligning the through hole of the adjusting plate 311 with the adjusting holes 307 of different heights in the limiting groove 306. Then, the positioning pin 308 is inserted sequentially into the aligned adjusting holes 307 and through holes, thus achieving a fixed adjustment of the height of the forward wheel 3. This ensures that the forward wheel 3 is always in close contact with the inner wall of the pipe, guaranteeing stable propulsion, improving applicability to pipes of different diameters, and increasing operational flexibility. The height adjustment of the forward wheel 3 can be completed quickly, adapting to various pipe specifications from smaller to larger diameters. Furthermore, it reduces equipment procurement and replacement costs, can handle situations with varying pipe diameters on site, eliminates the need to disassemble the entire device, improves operational efficiency, and meets the cleaning needs of pipes of different diameters.

[0048] It should be noted that the damper 310 is fixed to the bottom of the mounting slot of the fixed base 302 by bolts (not shown in the figure) passing through the bottom of the fixed base 302. This fixing method can be removed from the outside by removing the bolts. After the fixing is removed, the operator can pull out the entire adjustment assembly, including the damper 310, the adjusting base 304, the adjusting plate 311 and the forward wheel 3, from the mounting slot of the fixed base 302. After adjusting the height of the forward wheel 3 according to the actual pipe diameter requirements, the adjustment assembly is put back into the mounting slot, and the damper 310 is fixed to the bottom of the fixed base 302 again with bolts. The propulsion function of the device can be restored. The entire adjustment process does not require disassembling the fixed base 302 body. The operation is convenient and does not affect the stability of other components of the device.

[0049] The front end face of the water tank 5 is threadedly fitted with a rotating nozzle 507 (e.g., ...). Figure 2 As shown in the diagram, a water storage tank 504 and a water pump 506 are fixedly connected inside. The water storage tank 504 serves as a liquid storage component, with a vertically upward-facing water inlet 502 at the top. The water inlet 502 extends through the top of the spray tank 5 to the outside, and the outer wall is machined with external threads. It can be sealed by threaded connection with the water inlet cap 503 with internal threads to prevent the cleaning liquid from leaking during the movement of the device. A power supply II 505 is also fixed inside the spray tank 5. This power supply is also a replaceable battery, which is specifically designed to provide power to the water pump 506.

[0050] The water storage tank 504 has an outlet on the front (such as...) Figure 8As shown, the water pump 506 is fixedly installed at the outlet, with its outlet end sealed and connected to the outlet. The end of the outlet away from the water storage tank 504 extends outward through the cover II 501 at the front end of the spray tank 5. The outer wall of the top end is threaded and threaded to the inner wall of the base of the rotary nozzle 507, achieving a stable connection of the spray path. The rotary nozzle 507 and the base adopt a rotatable connection structure. Multiple spray sections are evenly distributed along the circumference on the side of the nozzle. Each spray section has an angled outlet 508. When the water pump 506 starts, the cleaning liquid (with descaling agent added according to the type of dirt) in the water storage tank 504 is transported to the outlet, flows into the rotary nozzle 507 through the outlet, and is sprayed out at high speed from the angled outlet 508. With the reaction force generated by the angled spray, the rotary nozzle 507 can automatically rotate around the base, so that the cleaning liquid is evenly sprayed along the circumference of the inner wall of the pipe. Through the rotary nozzle 507, there is no need to... The front end of the water tank 5 is equipped with multiple fixed nozzles in different directions. There is no need to build complex multi-branch delivery pipelines to accommodate multiple nozzles. The area around the inner wall of the pipeline can be covered by the autonomous rotation of a single rotating nozzle 507, achieving all-round, dead-angle-free liquid spraying. When the spraying system malfunctions, the staff only needs to inspect or replace a single rotating nozzle 507 or a single delivery pipeline. There is no need to disassemble the complex multi-component structure, which reduces maintenance time and costs. At the same time, it also reduces the overall weight and volume of the device, making it more suitable for working environments in narrow pipelines.

[0051] It should be noted that the basic structure and conventional installation logic of the rotary nozzle 507 have been disclosed in existing related technologies and are existing technologies that can be directly obtained and applied by those skilled in the art. Therefore, its specific structural details (such as nozzle housing material, rotary bearing model, etc.) and standardized installation steps will not be repeated here.

[0052] In use, the device is placed inside a straight pipe. The motor 6 drives the rotating shaft 8 to rotate via the reducer 7. The rotating shaft 8 synchronously drives the cleaning component and the forward wheel 3 to rotate. The scraper 4 of the cleaning component rotates to scrape away dirt from the inner wall of the pipe. The forward wheel 3 drives the device to move forward along the pipe axis by friction with the pipe wall. At the same time, the water pump 506 delivers the cleaning liquid in the water tank 504 to the rotating nozzle 507. The rotating nozzle 507 rotates and sprays the cleaning liquid, which, together with the scraper 4, completes the pre-softening of dirt and residual rinsing, realizing efficient and automated removal of dirt from the pipe.

[0053] All other parts of this utility model not described herein are the same as existing technologies, or are known technologies, or can be implemented using existing technologies, and will not be described in detail here.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-propelled pipe fouling scraping device, characterized in that, include: The drive box (1) is equipped with a motor (6) and a reducer (7). The reducer (7) is fixedly connected to the drive box (1) by bolts. The output shaft of the reducer (7) passes through the rear end face of the drive box (1) and is connected to the rotating shaft (8). When the motor (6) is running, the speed is adjusted and the torque is increased by the reducer (7), which drives the rotating shaft (8) to rotate. A cleaning component is fixedly connected to the outer wall of the rotating shaft (8), which cleans the inner wall of the pipe as the rotating shaft (8) rotates. The forward wheel (3) is circumferentially fixed to the outer wall of the fixed ring I (303) by the fixed seat (302). The axis of the forward wheel (3) is at an angle to the axis of the fixed seat (302). The fixed ring I (303) is fixedly connected to the outer wall of the rotating shaft (8) by bolts. The rotating shaft (8) is driven by the motor (6) and the reducer (7) to drive the fixed ring I (303) to rotate synchronously. The fixed ring I (303) then drives the fixed seat (302) on the outer wall to move together with the forward wheel (3), so that the forward wheel (3) generates rolling friction on the inner wall of the pipe. The friction force drives the entire device to move forward along the axis of the pipe. The fixed base (302) is provided with an adjustable component for adjusting the height of the forward wheel (3) to adapt to pipes of different diameters; The water tank (5) has a rotating nozzle (507) installed on its front end via a threaded connection. The nozzle (507) sprays water evenly onto the inner wall of the pipe through its angled outlet (508), and works with the cleaning components to pre-soften dirt and rinse away residual dirt after scraping.

2. The self-propelled pipe fouling scraping device according to claim 1, characterized in that: The adjustable component includes a damper (310) and an adjusting base (304). The piston rod of the damper (310) is fitted with a compression spring (309). The top of the piston rod and the compression spring (309) are fixedly connected to the lower end face of the adjusting base (304). The upper end face of the fixed seat (302) is provided with an installation groove that is adapted to the adjusting base (304). The bottom of the damper (310) is fixedly connected to the bottom of the installation groove of the fixed seat (302).

3. The self-propelled pipe fouling scraping device according to claim 2, characterized in that: A guide strip (305) is fixedly installed on one side of the inner wall of the mounting groove. The side of the adjusting base (304) facing the guide strip (305) is provided with a limiting groove (306) that is compatible with the guide strip (305). The position of the guide strip (305) corresponds to both sides of the limiting groove (306), and a preset space is left in the middle of the guide strip (305) to avoid the positioning pin (308) on the front of the adjusting base (304).

4. The self-propelled pipe fouling scraping device according to claim 3, characterized in that: Multiple adjustment holes (307) are evenly opened in the vertical direction in the limiting groove (306). An adjustment plate (311) is movably inserted into the adjustment base (304). A wheel frame (301) is fixedly connected to the top of the adjustment plate (311). The forward wheel (3) is rotatably connected to the wheel frame (301) through a pin. A through hole adapted to the adjustment hole (307) is opened on the bottom front end face of the adjustment plate (311). By changing the depth of the adjustment plate (311) inserted into the adjustment base (304), the through hole of the adjustment plate (311) is aligned with the adjustment holes (307) of different heights in the limiting groove (306). Then, the positioning pin (308) is inserted into the aligned adjustment hole (307) and the through hole of the adjustment plate (311) in sequence to realize the adjustment of the height of the forward wheel (3).

5. A self-propelled pipe fouling scraping device according to claim 1, characterized in that: The cleaning assembly includes a scraper (4), a slot plate (401), and a fixing ring II (404). The fixing ring II (404) is fixedly connected to the outer wall of the rotating shaft (8) by bolts. The slot plate (401) is evenly fixedly connected to the outer wall of the fixing ring II (404) along the circumferential direction of the fixing ring II (404). The scraper (4) is inserted into the slot of the slot plate (401). The bottom of the scraper (4) and the bottom of the slot plate (401) are provided with through holes of suitable diameter. The fixing bolt (402) is passed through the through hole at the bottom of the scraper (4) and the through hole at the bottom of the slot plate (401) in sequence, and then the fixing nut (403) is screwed in and tightened to achieve a stable connection between the scraper (4) and the slot plate (401).

6. The self-propelled pipe fouling scraping device according to claim 1, characterized in that: A water storage tank (504) is fixedly connected inside the water tank (5). The top of the water storage tank (504) is provided with a water inlet (502). The water inlet (502) extends vertically upward through the top of the water tank (5) and extends to the outside of the water tank (5). The outer wall of the water inlet (502) is provided with an external thread and is covered by a threaded water inlet cap (503) with an internal thread, thereby sealing the water storage tank (504).

7. A self-propelled pipe fouling scraping device according to claim 6, characterized in that: A water outlet is provided on the front of the water storage tank (504), and a water pump (506) is fixedly installed at the water outlet. The water outlet end of the water pump (506) is connected to the water outlet. The end of the water outlet away from the water storage tank (504) passes through the cover II (501) of the front end of the spray tank (5) and extends to the outside of the spray tank (5). The outer wall of the top of the water outlet extending to the outside of the spray tank (5) is provided with an external thread and is threaded to the inner wall of the base of the rotating nozzle (507). The rotating nozzle (507) and the base of the rotating nozzle (507) are rotatably connected. The side of the rotating nozzle (507) is uniformly provided with a spray section, and an oblique water outlet (508) is provided on the spray section to uniformly spray liquid onto the inner wall of the pipe.

8. The self-propelled pipe fouling scraping device according to claim 1, characterized in that: The inner wall of the drive box (1) is fixedly connected to a power supply I (102) for supplying power to the motor (6) and the reducer (7). The power supply I (102) is a replaceable battery power supply. The drive box (1) is bolted to a detachable cover I (101) for easy removal and replacement of the power supply I (102). Meanwhile, the inner wall of the water tank (5) is fixedly connected to a power supply II (505) for supplying power to the water pump (506). The power supply II (505) is also a replaceable battery structure.

9. A self-propelled pipe fouling scraping device according to claim 1, characterized in that: A bracket (2) is uniformly fixedly connected to the outer side wall of the drive box (1) along the circumferential direction of the outer side wall, and a collision wheel (201) is rotatably connected to the top of the bracket (2).

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