JPH11179309A - Method for cleaning existing pipeline - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cleaning an existing pipeline capable of improving cleaning workability by evenly removing foreign substances in the whole region of the inner face of the pipeline in the circumference direction and in the direction in which the pipeline is laid at the time of moving in the existing pipeline. SOLUTION: This existing pipeline 1-cleaning method for removing foreign substances adhering to the inner face of an existing pipeline 1 by high pressure water is provided with a cleaning head 4 installed in the tip of a water sending hose 3. A freely rotatable brush 5 capable of touching the inner face of an existing pipeline 2 and a water flow jetting part 6 capable of jetting high pressure water current toward the inner face of the existing pipeline 2 are installed in the cleaning head 4. The brush 5 and the water flow jetting part 6 are installed respectively in a brush supporting part and a high pressure water storage part formed in the inside of the cleaning head 4. The brush 5 is rotated due to the intra-pipe air flow due to the intra- pipe pressure difference caused at the time when the cleaning head 4 is moved in the existing pipeline 2 and the water current jetting part 6 moves the cleaning head 4 by the reaction at the time when the water current jetting part 6 jets out high pressure water backward to the direction in which the cleaning head 4 moves in the existing pipeline 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cleaning device for an existing pipeline.

[0002]

2. Description of the Related Art Pipes buried underground include communication pipes and power pipes for inserting communication cables and power transmission cables in addition to gas pipes and water pipes. In these pipelines, if the laying period is long, a broken portion such as a leak hole may be generated in the pipe due to aging or the like, and rust or rust bumps may be generated on the inner surface of the pipeline due to rainwater that has entered from the broken portion. When the above-mentioned corroded pipeline is rehabilitated and repaired, it is necessary to perform an in-pipe cleaning for removing foreign substances such as dust adhering to the inner surface of the pipe as a work before the repair.

As one of the apparatuses used for cleaning the inside of a pipe, for example, there is a configuration in which a nozzle head capable of jetting a high-pressure jet water flow is provided at the tip of a water supply hose inserted into an existing pipe. With this configuration, the jet water stream can be ejected backward in the direction of movement in the existing pipeline, and the nozzle head is advanced by the reaction at the time of ejection, and the jet water stream is applied to the inner wall of the pipeline to generate dust. Such foreign substances are peeled and removed.

[0004]

However, in the above-described cleaning apparatus, since the jet water jets are ejected from only a plurality of locations of the nozzle head, it is not possible to uniformly remove foreign matters in the entire circumferential area of the inner surface of the pipeline. Moreover, in order to remove foreign matter over the entire area of the existing pipeline in the laying direction, it is necessary to repeatedly insert and remove the nozzle head. That is,
As described above, since the jet water flow is generated at a plurality of locations in the circumferential direction and the laying direction of the inner surface of the pipeline, the cleaning action in a continuous region is not obtained, so the nozzle head is installed in the existing pipeline. The foreign matter cannot be completely eliminated only by moving once. Therefore, the time required for the cleaning operation is lengthened, and the workability is deteriorated.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional cleaning apparatus for existing pipelines, it is an object of the present invention to remove foreign substances evenly in the circumferential direction and in the laying direction of the inner surface of the pipeline when moving in the existing pipeline. An object of the present invention is to provide a cleaning device for an existing pipeline, which can improve the cleaning workability by being able to do so.

[0006]

In order to achieve this object, an invention according to claim 1 is a cleaning device for an existing pipeline for removing foreign matter adhering to the inner surface of the existing pipeline by a high-pressure water flow. The cleaning head is provided with a rotatable brush capable of contacting the inner surface of the existing pipeline and a water jetting portion capable of jetting a high-pressure water flow toward the inner surface of the existing pipeline. The brush and the water jet are arranged in a brush support portion and a high-pressure water storage portion provided inside the cleaning head, respectively, and the brush is used when the cleaning head moves in the existing pipeline. Rotated by the air flow in the pipe due to the pressure difference in the pipe generated in the pipe, the water jetting section is obtained when the washing head jets high-pressure water backward in the direction in which the washing head moves in the existing pipe. It is characterized by advancing the cleaning head by the reaction.

According to a second aspect of the present invention, in the cleaning device for an existing pipeline according to the first aspect, the water jetting portion is constituted by an opening formed at an even position along a circumferential direction of the cleaning head. It is characterized by being.

According to a third aspect of the present invention, in the cleaning apparatus for an existing pipeline according to the first aspect, the brush is provided in a plurality of stages along a moving direction of the cleaning head.

[0009]

According to the first and third aspects of the present invention, when the cleaning head is moved forward by a reaction when the high-pressure water jet is jetted from the water jet of the cleaning head located at the tip of the water supply hose, the cleaning head is separated from the cleaning head. The brush can be rotated by the air flow in the pipe generated by the pressure difference between the upstream side and the downstream side in the moving direction of the cleaning head, so that the entire circumferential area of the inner surface of the existing pipe line can be covered without the need for a brush driving means. Foreign matter present on the inner surface of the tube as an object can be peeled off, and the foreign matter can be washed away by a high-pressure water stream.

According to the second aspect of the present invention, since the high-pressure water jet spouted from the spouting portion is spouted from the opening at a position equally divided in the circumferential direction of the cleaning head, a uniform reaction force is exerted in the circumferential direction of the cleaning head. The brush can be uniformly brought into contact with the entire circumferential area without being partially deflected in the circumferential direction of the existing pipeline.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a schematic perspective view for explaining the overall configuration of a cleaning device according to an embodiment of the present invention. In FIG. 1, a cleaning device 1 includes a water supply hose 3 inserted into an existing pipeline 2, A cleaning head 4 attached to the tip of the water supply hose 3. As shown in FIG. 2, the cleaning head 4 includes a pipe-shaped brush support 4A having a ventilation part (not shown) on the peripheral surface and a high-pressure water storage chamber 4B communicating with the water supply hose 3. A brush 5 is rotatably supported on 4A, and a water jet 6 is provided in the high-pressure water storage chamber 4B.

In FIG. 2, the brush 5 has a rotating blade 5A at the center, and the brush 5 is implanted on the outer peripheral surface of the rotating blade 5A. The rotary blade 5A is integrated with a rotatable rotary shaft 5B by a bearing 4C fixed to the outer wall of the high-pressure water storage chamber 4B, and is formed inside the pipe generated when the cleaning head 4 moves in the existing pipeline 2. It rotates in response to the airflow due to the differential pressure. The bearing portion 4C has an inclined outer peripheral surface for guiding the air discharged from the rotary blade 5A toward the outer peripheral surface of the cleaning head 4, as indicated by an arrow F in FIG. Note that a post 5C is fixed to an end surface on the air introduction side with respect to the rotary blade 5A,
A spoke-shaped support member 7 is attached to the column 5C, and a pipe member 8 is fixed to the tip of the support member 7. The pipe member 8 is used to collectively introduce the air flow in the pipe to the rotary blade 5A.

The water jet section 6 is constituted by an opening formed at a position equally divided in the circumferential direction of the high-pressure water storage chamber 4B, and the direction in which the opening is formed is indicated by an arrow in FIG. It is directed backward in the direction of movement of the cleaning head 4, and at the same time, is capable of jetting high-pressure water toward the inner surface of the existing pipeline 2.

Since the present embodiment has the above configuration,
The cleaning head 4 to which the water supply hose 3 is connected is inserted into the existing pipeline 2. When the cleaning head 4 is inserted into the existing pipeline 2, high-pressure water is introduced into the high-pressure water storage chamber 4B from a pump device (not shown) via the water supply hose 3. Thereby, a high-pressure water stream is jetted from the water jet section 6, and the cleaning head 4 moves forward by a reaction generated at that time. At this time, since the water jetting portion 6 is formed at an even position in the circumferential direction of the cleaning head 4, a uniform reaction force can be obtained in the circumferential direction of the inner surface of the existing pipeline 2, thereby. In addition, the skew of the cleaning head 4 generated when the reaction force is deviated to a part in the circumferential direction is prevented. For this reason, when the cleaning head 4 moves forward, a pressure difference is generated between the upstream side and the downstream side in the movement direction with the cleaning head 4 as a boundary, and an air flow is generated in the pipe due to the pressure difference. This air flow is pipe material 8
When introduced into the rotating blade 5A, the rotating blade 5A
Is rotated, and the brush 5 is rotated while being in contact with the inner surface of the existing pipeline 2. Therefore, since the brush 5 rotates while being in contact with the entire inner circumferential direction of the existing pipeline 2, foreign matters can be evenly separated or slipped down in the inner circumferential direction of the existing pipeline 2. When a high-pressure water stream strikes from 6, it is washed away by the pressure.

According to the above-described embodiment, not only the high-pressure water flow spouted from the water-flow spouting portion 6 but also the foreign matter adhering to the inner surface of the pipe before being washed with the high-pressure water is scraped off by the brush 5. Therefore, the inside of the pipe can be effectively cleaned.

On the other hand, as shown in FIG. 3, the brush 5 can be provided in a plurality of stages in the moving direction of the cleaning head 4. In this case, another rotating blade 5A is arranged in parallel with the rotating shaft 5B of the rotating blade 5A shown in FIG. Instead of providing the brushes in a plurality of stages, the rotating blades 5A and the brushes 5 having a width corresponding to the plurality of stages may be provided on the rotating shaft 5B as a single member.

According to such a configuration, the range of scraping foreign matter is increased, so that foreign matter can be more effectively removed.

[0018]

According to the first and third aspects of the present invention,
When the cleaning head is advanced due to the reaction when the high-pressure water jet is jetted from the water jet of the cleaning head located at the end of the water supply hose, the difference between the upstream and downstream of the cleaning head in the moving direction of the cleaning head is determined. Since the brush can be rotated by the air flow in the pipe generated by the pressure, the foreign matter existing on the pipe inner surface is peeled off for the entire circumferential direction of the existing pipe inner surface without requiring a brush driving means,
Then, the foreign matter can be washed away by the high-pressure water flow. As a result, the brush is rotated while contacting the entire inner surface of the existing pipeline, so that there is no uneven scraping of foreign matter over the entire inner surface of the pipeline, and the inside of the pipe can be reliably cleaned without performing repetitive operations.

According to the second aspect of the present invention, since the high-pressure water jet spouted from the spouting portion is spouted from the opening at a position equally divided in the circumferential direction of the cleaning head, a uniform reaction in the circumferential direction of the cleaning head. By generating a force, the brush can make uniform contact with the entire circumferential direction without being partially deflected in the circumferential direction of the existing pipeline. As a result, it is possible to reliably prevent unevenness in scraping of foreign matter generated when the brush contacts only a part of the inner surface of the existing pipeline in the circumferential direction, so that the cleaning head can be smoothly moved in addition to cleaning the inside of the pipeline. Can be

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a cleaning device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a main configuration of the cleaning device shown in FIG. 1;

FIG. 3 is a schematic perspective view for explaining a partially modified structure of the cleaning device shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cleaning device 2 Existing pipeline 3 Water supply hose 4 Cleaning head 4A Brush support part 4B High-pressure water storage chamber 5 Brush 5A Rotating blade 5B Rotary shaft 6 Water jetting part

Claims (3)

[Claims] 1. A cleaning device for an existing pipeline for removing foreign matter adhering to an inner surface of the existing pipeline by a high-pressure water flow, comprising: a cleaning head provided at a tip of a water supply hose; A rotatable brush capable of contacting the inner surface and a water jet ejecting unit capable of ejecting a high-pressure water jet toward the inner surface of the existing pipeline are provided. The brush and the water jet ejecting unit are provided inside the cleaning head. The brush is rotated by an in-pipe air flow caused by an in-pipe differential pressure generated when the cleaning head moves in the existing pipe, and the water jetting section is disposed in the high-pressure water storage section. Is characterized in that the cleaning head is advanced by a reaction obtained when the cleaning head ejects high-pressure water toward the rear in a direction in which the cleaning head moves in the existing pipeline. That the existing line of the cleaning device. 2. The cleaning device for an existing pipeline according to claim 1, wherein the water jetting portion is constituted by an opening formed at an even position along a circumferential direction of the cleaning head. Cleaning equipment for existing pipelines. 3. The cleaning device for an existing pipeline according to claim 1, wherein the brush is provided in a plurality of stages along a moving direction of the cleaning head.