A long-distance pipeline inner wall cleaning device

Abstract

This invention discloses a long-distance pipeline inner wall cleaning device in the field of pipeline cleaning technology, comprising two foam cotton rings and two annular plates. A central shaft is provided in the middle of the annular plates, and the two foam cotton rings are fixedly installed on the outside of the central shaft. On the side of the two annular plates that are close to each other, four extrusion mesh plates are provided by an extrusion mechanism. The foam cotton on the left is located in the space enclosed by the four extrusion mesh plates on the left. The extrusion mechanism is used to drive the extrusion mesh plates to extrude one of the foam cotton rings when the foam cotton rings move. A water collection mechanism is provided on the side of the extrusion mesh plates away from the central shaft. The water collection mechanism is used to collect the water squeezed out from the foam cotton rings. A foam cotton plate is provided at the left end of the central shaft. This invention solves the problem that existing long-distance pipeline inner wall cleaning devices cannot thoroughly dry the inner wall of the pipeline.

Description

Technical Field

[0001] This invention relates to the field of pipeline cleaning technology, specifically to a device for cleaning the inner wall of a long-distance pipeline. Background Technology

[0002] Natural gas long-distance pipelines refer to pipelines that transport natural gas from extraction sites or processing plants to urban gas distribution centers or industrial users. Over time, the inner walls of these pipelines accumulate sludge and rust, which seriously affects their lifespan. Cleaning methods for long-distance pipelines include high-pressure water cleaning, PIG cleaning, and so on.

[0003] After high-pressure water cleaning, the inner wall of the pipeline needs to be dried. At this time, the staff inserts foam cotton that matches the size of the pipeline into the pipeline and uses an air pump to push the foam cotton to move and absorb water inside the pipeline. However, as the moisture inside the long-distance pipeline increases, its adsorption capacity gradually weakens, which seriously affects the drying operation of the latter half of the pipeline and causes inconvenience to the drying of the inner wall of the pipeline.

[0004] Based on this, the present invention designs a long-distance pipeline inner wall cleaning device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a long-distance pipeline inner wall cleaning device with the function of fully drying the inner wall of the pipeline, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a long-distance pipeline inner wall cleaning device, comprising two foam cotton rings and two annular plates. A central shaft is provided in the middle of the annular plates. The two foam cotton rings are fixedly installed on the outside of the central shaft. Four extrusion mesh plates are provided on the side of the two annular plates that are close to each other through an extrusion mechanism. The foam cotton ring on the left is located in the space enclosed by the four extrusion mesh plates on the left. The extrusion mechanism is used to drive the extrusion mesh plates to extrude one of the foam cotton rings when the foam cotton ring moves. A water collection mechanism is provided on the side of the extrusion mesh plate away from the central shaft. The water collection mechanism is used to collect the water squeezed out from inside the foam cotton ring. A foam cotton plate is provided at the left end of the central shaft.

[0007] As a further embodiment of the present invention, the extrusion mechanism includes an arc-shaped groove on the side of the extrusion mesh plate away from the annular plate. An arc-shaped plate is provided between two adjacent extrusion mesh plates. Insert rods are fixedly installed on the sides of the arc-shaped plates away from the annular plate. The ends of the insert rods pass through the arc-shaped groove and are slidably connected to it. The ends of the arc-shaped plates are in contact with the adjacent extrusion mesh plates. The sidewalls of the arc-shaped plates are in contact with the annular plate. The sidewalls of the extrusion mesh plates are in contact with the annular plate. A driving mechanism is provided at the left end of the central shaft. The driving mechanism is used to drive the central shaft to reciprocate left and right relative to the annular plate when the foam cotton ring moves. A shrinking mechanism is provided in the middle of the annular plate. The shrinking mechanism is used to drive the four extrusion mesh plates on the right side to move closer to each other when the central shaft moves to the right, and to drive the four extrusion mesh plates on the left side to move closer to each other when the central shaft moves to the left.

[0008] As a further embodiment of the present invention, the driving mechanism includes a mounting box disposed at the left end of the central shaft, a mounting bracket fixedly mounted between the two annular plates, the left end of the mounting bracket being fixedly connected to the mounting box, a U-shaped rod slidably connected to the top end of the mounting box, the right end of the U-shaped rod being fixedly connected to the central shaft, a plurality of teeth fixedly mounted on the inner side of the left end of the U-shaped rod, a rotating disk rotatably connected to the top end of the mounting box, a plurality of teeth fixedly mounted on the left end of the rotating disk, a traveling wheel rotatably connected to the front side of the left end of the mounting box, the bottom end of the traveling wheel being connected to the rotating disk via a transmission belt, and the foam cotton board being fixedly mounted on the left end of the mounting box.

[0009] As a further embodiment of the present invention, the shrinkage mechanism includes an installation ring fixedly installed in the middle of the annular plate, and a sliding rod fixedly installed on the side of the extrusion mesh plate near the central axis. The ends of the sliding rods pass through the installation ring and are slidably connected thereto. A disc is rotatably connected to the inner side of the installation ring. Four guide grooves are formed on the surface of the disc. The ends of the sliding rods pass through the guide grooves and are slidably connected thereto. A through groove is formed on the inner side of the disc. Two arc-shaped strips are fixedly installed on the outer side of the central axis. The arc-shaped strips pass through the through grooves and are slidably connected thereto.

[0010] As a further embodiment of the present invention, a guide plate is fixedly installed on the side of the extrusion mesh plate away from the annular plate, and the guide plate is used to guide the foam cotton ring into the space between the extrusion mesh plates.

[0011] As a further embodiment of the present invention, the water collection mechanism includes four connecting plates fixedly installed at one end of two annular plates that are close to each other. Each connecting plate corresponds to an extrusion mesh plate, and an elastic waterproof ring is fixedly installed on the outer side of each connecting plate. The edge of the elastic waterproof ring is fixedly connected to the side wall of the annular plate and the outer side of the extrusion mesh plate, respectively. An absorbent cotton pad is provided between the connecting plate and the extrusion mesh plate. A storage mechanism is provided on the side wall of the annular plate. The storage mechanism is used to store the water squeezed out of the absorbent cotton pad when the annular plate and the connecting plate are close to each other.

[0012] As a further embodiment of the present invention, the storage mechanism includes water pipes fixedly installed on the side of the annular plate away from the extrusion mesh plate. The ends of the water pipes are connected to the area where the absorbent cotton pad is located via one-way valves. An opening and closing mechanism is provided on the side of the extrusion mesh plate near the connecting plate. The opening and closing mechanism is used to close the holes on the surface of the extrusion mesh plate when the extrusion mesh plate moves toward the connecting plate. The two water pipes are connected to each other via a connecting pipe. A flexible hose is fixedly installed on the left side of the bottom end of the left water pipe. A water bladder is fixedly installed on the bottom end of the mounting box. The end of the flexible hose is connected to the water bladder.

[0013] As a further embodiment of the present invention, the opening and closing mechanism includes a groove formed on the side of the extrusion mesh plate near the connecting plate, a baffle plate slidably connected to the inner side of the groove, a magnet fixedly installed on the side of the baffle plate near the annular plate, and a plurality of attractive magnetic blocks and repulsive magnetic blocks fixedly installed on the surface of the annular plate. Compared with the repulsive magnetic blocks, the attractive magnetic blocks are closer to the central axis.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. By setting two foam cotton rings, when the device moves a certain distance in the pipe, the squeezing mechanism drives the foam cotton ring that has absorbed more water to move between several squeezing mesh plates. At the same time, another dry foam cotton ring moves to the position of the previous foam cotton ring and continuously wipes and dries the inner wall of the pipe. This achieves the replacement of the foam cotton ring whenever the device moves a certain distance, avoiding the foam cotton ring from becoming saturated.

[0015] 2. This invention, by setting up an extrusion mechanism, when the nearly saturated foam cotton ring is moved between several extrusion mesh plates, the shrinkage mechanism drives the several extrusion mesh plates to extrude the foam cotton ring, thereby achieving the drying operation of the foam cotton ring and preparing it for subsequent replacement. The repeated operation ensures that the foam cotton ring always maintains a good adsorption state, thereby improving the drying efficiency and bringing convenience to the cleaning and drying operation of long-distance pipelines.

[0016] 3. By setting up a water collection mechanism, the foam cotton ring is gradually squeezed out of water by the squeezing mesh plate. At this time, the water collection mechanism absorbs and collects the squeezed water, thereby preventing the squeezed water from falling back into the pipe and preventing the water from causing secondary wetting of the pipe. When the device is taken out from the end of the long-distance pipeline, all the water in the long-distance pipeline can be taken out at once, which greatly enhances the water absorption and drying effect of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a side view structural diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure from a side-down perspective of the present invention.

[0020] Figure 4 This is a schematic diagram of the forward tilting view structure of the present invention.

[0021] Figure 5 This is a side-view cross-sectional structural diagram of the present invention.

[0022] Figure 6 This is a schematic diagram of the internal structure of the front-view cross-section of the present invention.

[0023] Figure 7 This is a schematic diagram of the internal structure of the present invention from a side view cross-section.

[0024] Figure 8 This is a schematic diagram of the connection structure between the extruded mesh plate and the arc-shaped plate in this invention.

[0025] Figure 9 This is a schematic diagram of the connection structure between the extruded mesh plate and the connecting plate in this invention.

[0026] Figure 10 This is a schematic diagram of the connection structure between the extruded mesh plate and the shielding plate in this invention.

[0027] The components represented by each number in the attached diagram are listed below: 1. Foam ring; 2. Annular plate; 3. Central shaft; 4. Extruded mesh plate; 5. Foam board; 6. Arc groove; 7. Arc plate; 8. Insert rod; 9. Mounting box; 10. Mounting bracket; 11. U-shaped rod; 12. Tooth; 13. Rotating disc; 14. Traveling wheel; 15. Transmission belt; 16. Mounting ring; 17. Slide rod; 18. Disc; 19. Guide groove; 20. Through groove; 21. Arc strip; 22. Guide plate; 23. Connecting plate; 24. Elastic waterproof ring; 25. Absorbent cotton pad; 26. Water pipe; 27. Connecting pipe; 28. Flexible hose; 29. ​​Water bladder; 30. Slide groove; 31. Baffle plate; 32. Magnet; 33. Attracting magnetic block; 34. Repelling magnetic block. Detailed Implementation

[0028] Please see Figures 1-10 This invention provides a technical solution: a long-distance pipeline inner wall cleaning device, comprising two foam cotton rings 1 and two annular plates 2. A central shaft 3 is provided in the middle of the annular plates 2. The two foam cotton rings 1 are fixedly installed on the outside of the central shaft 3. On the side of the two annular plates 2 that are close to each other, four extrusion mesh plates 4 are provided by an extrusion mechanism. The left foam cotton ring 1 is located in the space enclosed by the four extrusion mesh plates 4 on the left. The extrusion mechanism is used to drive the extrusion mesh plates 4 to extrude one of the foam cotton rings 1 when the foam cotton ring 1 moves. A water collection mechanism is provided on the side of the extrusion mesh plate 4 away from the central shaft 3. The water collection mechanism is used to collect the water squeezed out from the foam cotton ring 1. A foam cotton plate 5 is provided at the left end of the central shaft 3.

[0029] The extrusion mechanism includes an arc-shaped groove 6 on the side of the extrusion mesh plate 4 away from the annular plate 2. An arc-shaped plate 7 is provided between each two adjacent extrusion mesh plates 4. Insert rods 8 are fixedly installed on the sides of the arc-shaped plates 7 away from the annular plate 2. The ends of the insert rods 8 pass through the arc-shaped groove 6 and are slidably connected to it. The ends of the arc-shaped plates 7 are in contact with the adjacent extrusion mesh plates 4. The side walls of the arc-shaped plates 7 are in contact with the annular plate 2. The side walls of the extrusion mesh plates 4 are in contact with the annular plate 2. A drive mechanism is provided at the left end of the central shaft 3. The drive mechanism is used to drive the central shaft 3 to reciprocate left and right relative to the annular plate 2 when the foam cotton ring 1 moves. A shrinkage mechanism is provided in the middle of the annular plate 2. The shrinkage mechanism is used to drive the four extrusion mesh plates 4 on the right to move closer to each other when the central shaft 3 moves to the right, and to drive the four extrusion mesh plates 4 on the left to move closer to each other when the central shaft 3 moves to the left.

[0030] During operation, the device is placed inside a long-distance pipeline. An air pump drives the foam board 5 to move, which in turn moves the entire device within the pipeline. During this movement, the foam ring 1 on the right side wipes the inner wall of the pipeline, absorbing moisture. When the foam ring 1 has moved a certain distance, the drive mechanism drives the central shaft 3 to move to the right relative to the annular plate 2. Figure 6 As shown, the movement of the central shaft 3 drives the two foam cotton rings 1 to move synchronously. At this time, the foam ring on the right, which has absorbed a large amount of water, moves to the right and moves between several extrusion mesh plates 4 on the right. The several extrusion mesh plates 4 on the left open under the action of the shrinkage mechanism. At this time, the foam cotton ring 1 on the left is no longer squeezed and gradually moves between the two sets of extrusion mesh plates 4 under the drive of the central shaft 3. At this time, the foam cotton ring 1 on the left is in contact with the inner wall of the pipe, thereby realizing the replacement of the foam cotton ring 1 and avoiding the foam cotton ring 1 absorbing too much water and making it difficult to dry the subsequent pipe.

[0031] When the right foam cotton ring 1 moves between the right extrusion mesh plates 4, as the central shaft 3 continues to move to the right, the shrinkage mechanism drives the right extrusion mesh plates 4 to extrude the right foam cotton ring 1, thereby drying the foam cotton ring 1 and preparing it for subsequent replacement. This cyclical operation ensures that the foam cotton ring 1 always maintains a good adsorption state, thus improving drying efficiency and bringing convenience to the cleaning and drying operations of long-distance pipelines.

[0032] The foam cotton ring 1 is squeezed by the extrusion mesh plate 4 and the water is gradually squeezed out. At this time, the water collection mechanism absorbs and collects the squeezed water, thereby preventing the squeezed water from falling back into the pipe and preventing the water from causing secondary wetting of the pipe. By setting the water collection mechanism, when the device is taken out from the end of the long-distance pipeline, all the water in the long-distance pipeline can be taken out at once, which greatly enhances the water absorption and drying effect of the device.

[0033] As a further embodiment of the present invention, the driving mechanism includes a mounting box 9 disposed at the left end of the central shaft 3, a mounting bracket 10 fixedly mounted between two annular plates 2, the left end of the mounting bracket 10 being fixedly connected to the mounting box 9, a U-shaped rod 11 being slidably connected to the top end of the mounting box 9, the right end of the U-shaped rod 11 being fixedly connected to the central shaft 3, a plurality of teeth 12 being fixedly mounted on the inner side of the left end of the U-shaped rod 11, a rotating disk 13 being rotatably connected to the top end of the mounting box 9, a plurality of teeth 12 being fixedly mounted on the left end of the rotating disk 13, a traveling wheel 14 being rotatably connected to the front side of the left end of the mounting box 9, the bottom end of the traveling wheel 14 being connected to the rotating disk 13 via a transmission belt 15, and a foam cotton board 5 being fixedly mounted on the left end of the mounting box 9.

[0034] During operation, as the device moves, the traveling wheel 14 remains in contact with the inner wall of the pipe. The traveling wheel 14 rolls along the inner wall of the pipe as it moves, and its rotation drives the rotating disk 13 to rotate via the transmission belt 15. The rotation of the rotating disk 13 causes several teeth 12 on its outer side to rotate clockwise. Figure 3 As shown, during the movement, the tooth 12 drives the U-shaped rod 11 to move to the right via the tooth 12 on the rear left side of the U-shaped rod 11. The movement of the U-shaped rod 11 to the right pushes the central shaft 3 to move to the right, thus providing power for the movement of the central shaft 3. The rotating disk 13 continues to rotate, causing the tooth 12 on the outer side of the rotating disk 13 to pass over the tooth 12 on the rear left side of the U-shaped rod 11. When the tooth 12 on the outer side of the rotating disk 13 faces forward, the movement of the tooth 12 on the outer side of the rotating disk 13 drives the tooth 12 on the front left side of the U-shaped rod 11 to move to the left, thus pushing the U-shaped rod 11 to drive the central shaft 3 to move to the left. This cycle repeats, realizing the switching of the foam cotton ring 1 every time the device moves a certain distance.

[0035] As a further embodiment of the present invention, the shrinking mechanism includes an mounting ring 16 fixedly installed in the middle of the annular plate 2, and a sliding rod 17 fixedly installed on the side of the extrusion mesh plate 4 near the central shaft 3. The ends of the sliding rods 17 pass through the mounting ring 16 and are slidably connected thereto. A disc 18 is rotatably connected to the inner side of the mounting ring 16. Four guide grooves 19 are opened on the surface of the disc 18. The ends of the sliding rods 17 pass through the guide grooves 19 and are slidably connected thereto. A through groove 20 is opened on the inner side of the disc 18. Two arc-shaped strips 21 are fixedly installed on the outer side of the central shaft 3. The arc-shaped strips 21 pass through the through grooves 20 and are slidably connected thereto.

[0036] During operation, the central shaft 3 moves to the right, causing the two arc-shaped strips 21 to move to the right. Taking the right arc-shaped strip 21 as an example, the right end of the right arc-shaped strip 21 passes through the through groove 20 and continues to move to the right. When the arc-shaped section of the arc-shaped strip 21 enters the through groove 20, the arc-shaped end pushes the disc 18 to rotate through the through groove 20. The rotation of the disc 18 pulls the slide rod 17 towards the central shaft 3 through the guide groove 19. The movement of the slide rod 17 pulls the extrusion mesh plate 4 towards the central shaft 3. During the movement of the extrusion mesh plate 4, it pushes the arc-shaped plate 7 towards the central shaft 3. At this time, while the arc-shaped plate 7 is moving, it drives the insertion rod 8 to slide inside the arc-shaped groove 6, so that the end of the arc-shaped plate 7 is always in contact with the adjacent extrusion mesh plate 4. The movement of the extrusion mesh plate 4 and the arc-shaped plate 7 realizes the extrusion of the foam cotton ring 1.

[0037] As a further embodiment of the present invention, guide plates 22 are fixedly installed on the side of the extrusion mesh plate 4 away from the annular plate 2. The guide plates 22 are used to guide the foam cotton rings 1 into the space between the extrusion mesh plates 4.

[0038] During operation, the central shaft 3 drives the foam cotton ring 1 to move towards the annular plate 2. At this time, the guide plate 22 guides the foam cotton ring 1, so that the foam cotton ring 1 can smoothly enter the space enclosed by the extrusion mesh plate 4 and the arc plate 7, thereby facilitating the subsequent extrusion of the foam cotton ring 1.

[0039] As a further embodiment of the present invention, the water collection mechanism includes four connecting plates 23 fixedly installed at one end of two annular plates 2 that are close to each other. Each connecting plate 23 corresponds to one extrusion mesh plate 4, and an elastic waterproof ring 24 is fixedly installed on the outer side of the connecting plate 23. The edge of the elastic waterproof ring 24 is fixedly connected to the side wall of the annular plate 2 and the outer side of the extrusion mesh plate 4, respectively. An absorbent cotton pad 25 is provided between the connecting plate 23 and the extrusion mesh plate 4. A storage mechanism is provided on the side wall of the annular plate 2. The storage mechanism is used to store the water squeezed out of the absorbent cotton pad 25 when the annular plate 2 and the connecting plate 23 are close to each other.

[0040] During operation, the foam cotton ring 1 is squeezed, and the water inside is gradually squeezed out. At this time, the water passes through the holes on the surface of the squeezing mesh plate 4 and is absorbed by the absorbent cotton pad 25. The absorbent cotton pad 25 temporarily collects the squeezed water. When the squeezing mesh plate 4 and the arc plate 7 open, the storage mechanism closes the holes on the surface of the squeezing mesh plate 4. At this time, the squeezing mesh plate 4 moves towards the connecting plate 23 and gradually squeezes the absorbent cotton pad 25. The water inside the absorbent cotton pad 25 is squeezed out and collected into the storage mechanism, so that the absorbent cotton pad 25 dries again, thus preparing for subsequent water absorption.

[0041] As a further embodiment of the present invention, the storage mechanism includes water pipes 26 fixedly installed on the side of the annular plate 2 away from the extrusion mesh plate 4. The ends of the water pipes 26 are connected to the area where the absorbent cotton pad 25 is located through one-way valves. An opening and closing mechanism is provided on the side of the extrusion mesh plate 4 near the connecting plate 23. The opening and closing mechanism is used to close the holes on the surface of the extrusion mesh plate 4 when the extrusion mesh plate 4 moves toward the connecting plate 23. The two water pipes 26 are connected to each other through a connecting pipe 27. A hose 28 is fixedly installed on the left side of the bottom end of the left water pipe 26. A water bladder 29 is fixedly installed on the bottom end of the mounting box 9. The end of the hose 28 is connected to the water bladder 29.

[0042] During operation, the extrusion mesh plate 4 and the arc plate 7 gradually open. At this time, the opening and closing mechanism seals the holes on the surface of the extrusion mesh plate 4. The extrusion mesh plate 4 squeezes the absorbent cotton pad 25, causing water to be squeezed out between the extrusion mesh plate 4, the connecting plate 23, and the elastic waterproof ring 24. As the space continues to shrink, the water squeezed out by the absorbent cotton pad 25 enters the water pipe 26 through the one-way valve. As the water in the water pipe 26 gradually increases, the water in the right water pipe 26 enters the left water pipe 26 through the connecting pipe 27. At this time, the water in the left water pipe 26 is gradually injected into the water bladder 29 through the hose 28. As the water is injected, the water bladder 29 gradually expands from a flat state, thereby realizing the storage of the collected water and preventing the collected water from wetting the inner wall of the pipe again.

[0043] As a further embodiment of the present invention, the opening and closing mechanism includes a groove 30 opened on the side of the extrusion mesh plate 4 near the connecting plate 23, a baffle plate 31 is slidably connected to the inner side of the groove 30, a magnet 32 ​​is fixedly installed on the side of the baffle plate 31 near the annular plate 2, and a plurality of attractive magnetic blocks 33 and repulsive magnetic blocks 34 are fixedly installed on the surface of the annular plate 2. Compared with the repulsive magnetic blocks 34, the attractive magnetic blocks 33 are closer to the central axis 3.

[0044] During operation, the squeezing mesh plate 4 moves towards the central axis 3, simultaneously driving the baffle plate 31 to move synchronously. When the squeezing mesh plate 4 can no longer move, the magnet 32 ​​is attracted and attracted, driving the baffle plate 31 to move towards the annular plate 2. The movement of the baffle plate 31 completely blocks the holes on the surface of the squeezing mesh plate 4, thus achieving the sealing of the squeezing mesh plate 4 when the foam cotton ring 1 is squeezed, preventing water in the absorbent cotton pad 25 from re-entering the foam cotton ring 1. When the squeezing mesh plate 4 moves away from the central axis 3 and can no longer move, the magnet 32 ​​is repelled by the repulsive magnetic block 34, causing the magnet 32 ​​to push the baffle plate 31 away from the annular plate 2. At this time, the holes on the surface of the squeezing mesh plate 4 reopen, thus preparing for the next water collection operation.

Claims

1. A device for cleaning the inner wall of a long-distance pipeline, comprising two foam cotton rings (1) and two annular plates (2), characterized in that: A central shaft (3) is provided in the middle of the annular plate (2). The two foam cotton rings (1) are fixedly installed on the outside of the central shaft (3). On the side of the two annular plates (2) that are close to each other, four extrusion mesh plates (4) are provided by the extrusion mechanism. The foam cotton ring (1) on the left is located in the space enclosed by the four extrusion mesh plates (4) on the left. The extrusion mechanism is used to drive the extrusion mesh plates (4) to extrude one of the foam cotton rings (1) when the foam cotton ring (1) moves. A water collection mechanism is provided on the side of the extrusion mesh plate (4) away from the central shaft (3). The water collection mechanism is used to collect the water squeezed out of the foam cotton ring (1). A foam cotton plate (5) is provided at the left end of the central shaft (3). The extrusion mechanism includes an arc-shaped groove (6) on the side of the extrusion mesh plate (4) away from the annular plate (2). An arc-shaped plate (7) is provided between each two adjacent extrusion mesh plates (4). Insert rods (8) are fixedly installed on both ends of the arc-shaped plate (7) away from the annular plate (2). The ends of the insert rods (8) pass through the arc-shaped groove (6) and are slidably connected to it. The ends of the arc-shaped plates (7) are in contact with the adjacent extrusion mesh plates (4), and the sidewalls of the arc-shaped plates (7) are in contact with the annular plate (2). The sidewalls of the extrusion mesh plate (4) are all in contact with the annular plate (2). A driving mechanism is provided at the left end of the central shaft (3). The driving mechanism is used to drive the central shaft (3) to reciprocate left and right relative to the annular plate (2) when the foam cotton ring (1) moves. A shrinking mechanism is provided in the middle of the annular plate (2). The shrinking mechanism is used to drive the four extrusion mesh plates (4) on the right side to move closer to each other when the central shaft (3) moves to the right, and to drive the four extrusion mesh plates (4) on the left side to move closer to each other when the central shaft (3) moves to the left. The shrinking mechanism includes an installation ring (16) fixedly installed in the middle of the annular plate (2). Each side of the extrusion mesh plate (4) near the central shaft (3) is fixedly installed with a slide rod (17). The ends of the slide rods (17) pass through the installation ring (16) and are slidably connected to it. A disc (18) is rotatably connected to the inner side of the installation ring (16). Four guide grooves (19) are opened on the surface of the disc (18). The ends of the slide rods (17) pass through the guide grooves (19) and are slidably connected to them. A through groove (20) is opened on the inner side of the disc (18). Two arc-shaped strips (21) are fixedly installed on the outer side of the central shaft (3). The arc-shaped strips (21) pass through the through grooves (20) and are slidably connected to them.

2. The long-distance pipeline inner wall cleaning device according to claim 1, characterized in that: The driving mechanism includes a mounting box (9) located at the left end of the central shaft (3), a mounting bracket (10) fixedly installed between the two annular plates (2), the left end of the mounting bracket (10) being fixedly connected to the mounting box (9), a U-shaped rod (11) being slidably connected to the top of the mounting box (9), the right end of the U-shaped rod (11) being fixedly connected to the central shaft (3), a number of teeth (12) being fixedly installed on the inner side of the left end of the U-shaped rod (11), a rotating disk (13) being rotatably connected to the top of the mounting box (9), a number of teeth (12) being fixedly installed on the left end of the rotating disk (13), a traveling wheel (14) being rotatably connected to the front side of the left end of the mounting box (9), the bottom end of the traveling wheel (14) being connected to the rotating disk (13) via a transmission belt (15), and a foam board (5) being fixedly installed on the left end of the mounting box (9).

3. The long-distance pipeline inner wall cleaning device according to claim 1, characterized in that: Each of the extrusion mesh plates (4) has a guide plate (22) fixedly installed on the side away from the annular plate (2). The guide plate (22) is used to guide the foam cotton ring (1) into the space between several extrusion mesh plates (4).

4. The long-distance pipeline inner wall cleaning device according to claim 2, characterized in that: The water collection mechanism includes four connecting plates (23) fixedly installed at one end of two annular plates (2) that are close to each other. Each connecting plate (23) corresponds to a squeezing mesh plate (4), and an elastic waterproof ring (24) is fixedly installed on the outer side of each connecting plate (23). The edge of the elastic waterproof ring (24) is fixedly connected to the side wall of the annular plate (2) and the outer side of the squeezing mesh plate (4). A water-absorbing cotton pad (25) is provided between the connecting plate (23) and the squeezing mesh plate (4). A storage mechanism is provided on the side wall of the annular plate (2). The storage mechanism is used to store the water squeezed out of the water-absorbing cotton pad (25) when the annular plate (2) and the connecting plate (23) are close to each other.

5. The long-distance pipeline inner wall cleaning device according to claim 4, characterized in that: The storage mechanism includes a water pipe (26) fixedly installed on the side of the annular plate (2) away from the extrusion mesh plate (4). The ends of the water pipe (26) are connected to the area where the absorbent cotton pad (25) is located through a one-way valve. The extrusion mesh plate (4) is provided with an opening and closing mechanism on the side near the connecting plate (23). The opening and closing mechanism is used to close the holes on the surface of the extrusion mesh plate (4) when the extrusion mesh plate (4) moves toward the connecting plate (23). The two water pipes (26) are connected by a connecting pipe (27). A hose (28) is fixedly installed on the left side of the bottom end of the left water pipe (26). A water bag (29) is fixedly installed on the bottom end of the mounting box (9). The end of the hose (28) is connected to the water bag (29).

6. The long-distance pipeline inner wall cleaning device according to claim 5, characterized in that: The opening and closing mechanism includes a groove (30) opened on the side of the extrusion mesh plate (4) near the connecting plate (23). A baffle plate (31) is slidably connected to the inner side of the groove (30). A magnet (32) is fixedly installed on the side of the baffle plate (31) near the annular plate (2). Several attractive magnetic blocks (33) and repulsive magnetic blocks (34) are fixedly installed on the surface of the annular plate (2). Compared with the repulsive magnetic block (34), the attractive magnetic block (33) is closer to the central axis (3).

Images