Self-adaptive rotary cleaning device and method for pipeline repair

Abstract

According to the self-adaptive rotary cleaning device and method for pipeline repair, a zigzag PVC pipe belt is additionally arranged in front of a nozzle with a certain angle, high-speed rotation of the nozzle is achieved by controlling the water flow and utilizing centrifugal force, and then the zigzag PVC pipe belt in front is driven to rotate at a high speed; an angle-adjustable pulley positioning system is matched and can be randomly adjusted according to the diameter of the pipeline, so that the whole device is positioned in the center of the pipeline. The device can solve the problem that stubborn dirt attached to the inner wall of the pipeline and plant rhizomes invade, is suitable for pipelines made of all materials, and is particularly suitable for cleaning and dredging pipelines such as PVC (polyvinyl chloride) pipes and corrugated pipes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of trenchless pipeline repair, and in particular to a self-adaptive rotating device and method for pipeline inner wall cleaning and repair construction. BACKGROUND

[0002] In existing pipeline repair, sometimes the spray head of the flushing vehicle cannot completely clean the stubborn dirt and plant roots attached to the inner wall of the pipeline, and the spray head of the pipeline is placed at the bottom of the pipeline, and the flushing effect on the upper part of the pipeline is poor, and the residual material affects the adhesion of the repair material.

[0003] In the existing related technology, such as the track wheel type robot disclosed in patent document (CN205579032U), which relies on a mechanical arm and a cleaning brush, has poor cleaning effect on stubborn dirt and plant roots without the aid of centrifugal force auxiliary dynamic milling components; self-adaptive relies on an electric push rod, the structure is complex, and the flexibility is insufficient in small pipe diameters or complex bends, and the volume is relatively large, which is not suitable for compact space in trenchless scene; the cleaning brush is a surface contact, and the milling capacity for hard attachments is weak, and the residual dirt affects the adhesion of the repair material. The drainage cleaning device disclosed in patent document (US5497514A) relies only on high-pressure water jetting without mechanical milling structure, which cannot remove stubborn dirt; self-centering relies on pipe end cutting fingers, which are easy to deviate under the impact of high-pressure water flow, causing the spray head to deviate from the center of the pipeline, resulting in uneven cleaning; the pipe length is spliced, and there is no stable self-adaptive support system, which cannot adapt to the center positioning needs of different pipe diameters; there is no rotating drive mechanical cleaning component, and the cleaning efficiency is low, especially for plant root invasion pipelines.

[0004] Therefore, there is an urgent need for a pipeline cleaning device that combines mechanical milling and high-pressure flushing, self-centering stability, adaptation to various pipe diameters, and compact structure to solve the pain points of existing technology. SUMMARY

[0005] The purpose of the present application is to provide a self-adaptive rotating cleaning device and method for pipeline repair, which can more easily clean the stubborn dirt and plant roots attached to the inner wall of the pipeline by adopting an innovative device design.

[0006] In order to achieve the above object, the technical scheme of the present application is: a self-adaptive rotating cleaning device for pipeline repair, comprising a dynamic cleaning assembly, a self-adaptive support system, an inclined nozzle and a high-pressure water pipe; the dynamic cleaning assembly is coaxially connected to the front end of the inclined nozzle and comprises a flexible PVC pipe belt and a detachable connector; the surface of the flexible PVC pipe belt is provided with sawtooth-shaped protrusions; the flexible PVC pipe belt is normally attached to the outer wall of the nozzle, and the nozzle is radially expanded under the action of centrifugal force when rotating; the self-adaptive support system is symmetrically installed behind the inclined nozzle and comprises 3-4 groups of angle-adjustable pulley frames and ratchet locking devices; the pulley frames are distributed in a circumferential symmetry, the inclination angle of the pulleys on the pulley frames is adjusted by the support adjusting frame of the ratchet locking device, and the angle of the pulleys is fixed by the ratchet locking device; the inclined nozzle is in communication with the high-pressure water pipe, the high-pressure water flow drives the nozzle to rotate around the pipeline axis, thereby driving the flexible PVC pipe belt to rotate synchronously.

[0007] Further, the flexible PVC pipe belt is quickly disassembled and assembled with the nozzle through the detachable connector.

[0008] Further, the thickness of the flexible PVC pipe belt is 4-6 mm; and the height of the sawtooth-shaped protrusions is 2-3 mm.

[0009] Further, the sawtooth-shaped protrusions are uniformly distributed on the outer surface of the flexible PVC pipe belt. Further, the adjustment range of the angle-adjustable pulley frame is 0°-60°.

[0010] Further, the maximum diameter of the flexible PVC pipe belt after rotating and expanding is more than 10 cm larger than the inner diameter of the pipeline to be cleaned, so as to ensure that the sawtooth-shaped protrusions completely adhere to the pipe wall.

[0011] Further, one end of the high-pressure water pipe is connected to a high-pressure water pump, and the other end is connected to the inclined nozzle through a bearing to ensure stable water supply.

[0012] Further, the diameter range of the pipeline to which the device is adapted is DN200-DN1000, and the adaptation is realized by adjusting the angle of the pulley frame and replacing the flexible PVC pipe belt of different lengths.

[0013] A pipeline cleaning method based on the self-adaptive rotating cleaning device for pipeline repair, comprising the following steps: (1) according to the diameter of the pipeline to be cleaned, a flexible PVC pipe belt with a diameter of 10 cm larger than the inner diameter of the pipeline after expansion is selected and installed at the front end of the inclined nozzle through a detachable connector; (2) adjust the angle of the pulley frame to 0°-60° to ensure that the nozzle axis is aligned with the pipeline axis, and fix the angle of the pulley by the ratchet locking device; (3) Insert the device into the pipeline to the position to be cleaned, connect the high-pressure water pipe to the high-pressure water pump and set the water flow pressure; (4) Start the high-pressure water pump, adjust the pressure and flow size, and rotate the nozzle under the reaction force of the water flow to drive the flexible PVC pipe belt to expand, and at the same time, the high-pressure water flow washes the remaining residues.

[0014] Further, the flexible PVC pipe belt can be replaced at any time according to the size of the pipe diameter and the damage condition.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: 1. High cleaning efficiency: mechanical milling (sawtooth pipe belt) combined with high-pressure washing, the sawtooth pipe belt can better mill the stubborn dirt and plant root diameter adhered to the inner wall of the pipeline when rotating, the stubborn dirt cleaning rate is increased by more than 90%, and the plant root cutting efficiency is increased by 80%, meeting the "no residue" requirement of pre-repair cleaning; 2. Self-centering stability: 3 sets of symmetrical pulleys + ratchet locking, pulley 3~4 point positioning ensures that the nozzle is always at the center of the pipeline (nozzle axis positioning deviation ≤2mm); 3. Wide adaptation range: by adjusting the pulley angle (0°~60°) and replacing the pipe belt, DN200-DN1000 pipe diameters can be covered, and municipal, industrial and other scenes can be adapted; 4. Good pipe compatibility: PVC material can be used for pipes of various materials, and the PVC pipe belt is soft and wear-resistant, which will not damage the inner wall of the steel pipe, corrugated pipe and other pipes, solving the problem of easy scratching of the pipeline by the metal parts of the prior art; 5. Low maintenance cost: the PVC pipe belt can be replaced separately; 6. Compact and safe structure: the overall device structure is compact, easy to install, suitable for various pipeline environments, especially suitable for narrow spaces in non-excavation scenes; no power drive is needed to avoid the risk of pipeline electric leakage; improve construction effect. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the self-adaptive rotating cleaning device for pipeline repair of the present application; Figure 2 is a cross-sectional view of the inside of the pipeline when rotating.

[0017] Labeling description: 1-pipe wall, 2-flexible PVC pipe belt, 3-detachable connector, 4-bearing, 5-nozzle, 6-pulley frame, 7-supporting adjusting frame, 8-pulley, 9-high-pressure water pipe. DETAILED DESCRIPTION The present application will be further described in detail below in combination with the drawings and specific embodiments As Figure 1,2 shown, the adaptive rotating cleaning device for pipeline repair of the present application comprises: A dynamic cleaning assembly is coaxially connected with the flexible PVC pipe belt 2 in front of the rotating nozzle 5, the surface of the flexible PVC pipe belt 2 is provided with sawtooth-shaped protrusions, the flexible PVC pipe belt 2 is attached to the outer wall of the nozzle 5 in normal state and is unfolded under the centrifugal force when rotating. The flexible PVC pipe belt 2 can be replaced at any time according to the size of the pipe diameter and the damage condition.

[0018] An adaptive support system is symmetrically installed with 3-4 groups of angle-adjustable pulley frames 6 behind the nozzle 5, the pulleys 8 are adjusted through the support adjusting frames 7 with ratchet locking devices and the angle is fixed.

[0019] The nozzle 5 is obliquely arranged, can rotate quickly under the action of high water pressure and drive the front sawtooth-shaped flexible PVC pipe belt 2 to rotate quickly under the action of centrifugal force. The rotating speed is adjusted according to the water pressure.

[0020] The length of the sawtooth-shaped flexible PVC pipe belt 2 can be selected according to the size of the pipe diameter and is connected with the nozzle 5 through the detachable connector 3, can be replaced quickly, can be unfolded radially under the action of centrifugal force and the unfolded diameter should be greater than the inner diameter of the pipe wall by more than 10 cm.

[0021] The pulley positioning system is arranged behind the nozzle 5, 3-4 groups of angle-adjustable pulley blocks are adopted, can be adjusted according to the size of the pipe diameter, the adjustment range is 0°-60° and the angle is locked through the ratchet locking structure after adjustment. The nozzle 5 and the sawtooth-shaped flexible PVC pipe belt 2 are ensured to be located in the center position of the pipeline when rotating at high speed.

[0022] A cleaning method based on the adaptive rotating cleaning device for pipeline repair, comprising the following steps: (1) The sawtooth-shaped flexible PVC pipe belt is selected according to the diameter of the pipeline, the length thereof should be able to cover the entire inner wall of the pipeline and the pulley positioning system is adjusted according to the diameter of the pipeline; (2) The high-pressure water pump is started, the pressure and flow rate are adjusted to realize high-speed rotation of the nozzle and drive the sawtooth-shaped flexible PVC pipe belt to mill in front, and the high-pressure water flow is washed immediately.

[0023] The core innovation points of the present application include: (1) A dynamic cleaning assembly is coaxially connected with the flexible PVC pipe belt in front of the rotating nozzle. The surface of the pipe belt is provided with sawtooth-shaped protrusions. The pipe belt is attached to the outer wall of the nozzle in normal state and is unfolded under the centrifugal force when rotating. The pipe belt can be replaced at any time according to the size of the pipe diameter and the damage condition.

[0024] (2) An adaptive support system is symmetrically installed with 3-4 groups of angle-adjustable pulley frames behind the nozzle. The pulleys are adjusted through the support adjusting frames with ratchet locking devices and the angle is fixed.

[0025] Technical embodiments of the present application are: (1) The PVC pipe belt with a thickness of 5 mm is used, the sawtooth height is 2.5 mm, and the diameter after unfolding is greater than the pipe diameter by 10 cm or more.

[0026] (2) The pulley frame is provided with 0°-60° adjustment scale, and the angle is locked through the ratchet locking structure.

[0027] (3) During construction: a) The pulley angle is adjusted according to the pipe diameter; b) The angle is locked to make the pulley closely adhere to the pipe wall; c) The high-pressure water pump is turned on, the water flow pressure is set to the required pressure, the nozzle is driven to rotate, and the PVC pipe belt is automatically unfolded.

[0028] d) The nozzle moves forward, and the pipe inner wall is milled and washed at the same time.

[0029] In summary, the present application provides a self-adaptive rotating cleaning device and method for pipeline repair, a sawtooth-shaped PVC pipe belt is added in front of a nozzle with a certain angle, the water flow size is controlled, the nozzle is rotated at high speed by using centrifugal force, and then the sawtooth-shaped PVC pipe belt in front is rotated at high speed; in cooperation with the angle-adjustable pulley positioning system, the diameter of the pipeline can be adjusted arbitrarily to ensure that the whole device is located at the center position of the pipeline. The device can solve the problem of stubborn dirt and plant root invasion attached to the inner wall of the pipeline, and is suitable for all materials of the pipeline, especially suitable for cleaning and dredging of PVC pipes, corrugated pipes and other pipelines.

Claims

1. An adaptive rotary cleaning device for pipeline repair, characterized in that, The system includes a dynamic cleaning component, an adaptive support system, an angled nozzle, and a high-pressure water pipe. The dynamic cleaning component is coaxially connected to the front end of the angled nozzle and includes a flexible PVC hose and a detachable connector. The surface of the flexible PVC hose has serrated protrusions. The flexible PVC hose normally fits against the outer wall of the nozzle and expands radially under centrifugal force when the nozzle rotates. The adaptive support system is symmetrically installed behind the angled nozzle and includes 3-4 sets of adjustable pulley frames and a ratchet locking device. The pulley frames are symmetrically distributed circumferentially. The pulleys on the pulley frames have their tilt angles adjusted by the support adjustment frame of the ratchet locking device, and the pulley angles are fixed by the ratchet locking device. The angled nozzle is connected to the high-pressure water pipe. The high-pressure water flow drives the nozzle to rotate around the pipe axis, thereby driving the flexible PVC hose to rotate synchronously.

2. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, The flexible PVC tubing can be quickly attached to or detached from the nozzle via a detachable connector.

3. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, The thickness of the flexible PVC tubing is 4-6 mm; the height of the serrated protrusions is 2-3 mm.

4. The adaptive rotary cleaning device for pipeline repair according to claim 3, characterized in that, The serrated protrusions are evenly distributed on the outer surface of the flexible PVC pipe.

5. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, The adjustable pulley bracket has an adjustment range of 0° to 60°.

6. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, The maximum diameter of the flexible PVC hose after rotation and unfolding is more than 10cm larger than the inner diameter of the pipe to be cleaned, ensuring that the serrated protrusions completely fit the pipe wall.

7. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, One end of the high-pressure water pipe is connected to a high-pressure water pump, and the other end is connected to an angled nozzle through a bearing to ensure a stable water supply.

8. The adaptive rotary cleaning device for pipeline repair according to claim 1, characterized in that, The device is compatible with pipe diameters ranging from DN200 to DN1000, and can be adapted by adjusting the angle of the pulley frame and replacing flexible PVC pipes of different lengths.

9. A pipe cleaning method based on the adaptive rotary cleaning device for pipe repair according to any one of claims 1-8, characterized in that, Includes the following steps: (1) Based on the diameter of the pipe to be cleaned, select a flexible PVC hose with a diameter 10cm larger than the inner diameter of the pipe after unfolding, and install it on the front end of the angled nozzle through a detachable connector; (2) Adjust the angle of the pulley bracket to 0°~60° to ensure that the nozzle axis is aligned with the pipe axis, and fix the pulley angle by using the ratchet locking device; (3) Insert the device into the pipe to the position to be cleaned, connect the high-pressure water pipe to the high-pressure water pump and set the water flow pressure; (4) Turn on the high-pressure water pump, adjust the pressure and flow rate, and the nozzle rotates under the reaction force of the water flow, which drives the flexible PVC pipe to unfold. The serrated protrusions mill the stubborn dirt on the pipe wall, while the high-pressure water flow washes away the residue.

10. The pipe cleaning method according to claim 9, characterized in that, The flexible PVC tubing can be replaced as needed based on the pipe diameter and any damage.

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