JP2005313092A - Pipe lining device and pipe lining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe lining device and a pipe lining method in which the inner wall can be uniformly and evenly coated by relatively simple operation without requiring highly skilled technique, in which coating can be rapidly performed in a short period of time, and which are advantageous in cost. <P>SOLUTION: A cylindrical body 8 is inserted from one end side of a pipe 7 undercoated with a coating P by a precursor 9A, a working fluid sent from the pipe 7 is sprayed to a rotary blade 10 and centrifugal force is generated by rotating the rotary blade 10 together with the cylindrical body 8. The coating P dropping into the cylindrical body 8 is discharged from a discharge hole 16 by the centrifugal force to fill the inner wall 7a of the pipe 7. At the same time, A tuft-string part 11 is spread to the peripheral part rotating as a brushing part and the coating P is pressed to the inner wall 7a of the pipe 7 to form a coating layer R. The coating operation can be completed by controlling the moving of a wire 12 with simple operation in a short period of time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pipe lining apparatus and a pipe lining method for coating an inner wall of a pipe for repairing or maintaining a drain pipe or a buried pipe.

Numerous foreign substances such as food residues, oils and fats, used detergents, hair, gravel, and earth and sand adhere to and accumulate in pipes such as buried pipes and drainage pipes that are placed inside or outside the building. Together with this, a scale is formed. In order to maintain the function and hygiene of the piping, it is necessary to completely remove the scale deposited and accumulated in the piping, and the piping is periodically cleaned using a cleaning device. After the piping is cleaned, from the viewpoint of durability and the like, the coating pig is used as a lining device so that the inner wall of the piping is coated as a lining.
This coating pig is composed of a cylindrical body with a spiral groove engraved, receives an air flow by the negative pressure supplied into the pipe, and performs a complex eccentric rotational motion involving rotation and revolution. The coating layer is formed by pressing the coating material against the inner surface of the pipe by the eccentric rotational motion of the coating pig (see, for example, Patent Document 1).
JP 2003-284899 A

  In the above painting pig, the edge of the groove functions like a scraper when painting pipes, and it is intended to scrape excess paint or redistribute it to parts with insufficient paint to achieve uniform painting. Yes. However, the actual situation is that the behavior of the coating pig in the pipe is not generally visible. For this reason, it is necessary to have an expert who knows the characteristics of the paint pig and paint over the years to accurately adjust the moving speed and operating time of the paint pig to complete the finish of the paint. Depending on the installation conditions and the like, workability may be reduced, leading to an increase in coating cost.

  The present invention is made in consideration of the above circumstances, and its purpose is not required for skill, and can be applied uniformly and uniformly to the piping by a relatively simple operation. It is an object of the present invention to provide a pipe lining apparatus and a pipe lining method that improve workability and are advantageous in terms of cost.

(About Claim 1 and Claim 10)
The cylindrical body has a rotary blade attached therein, and is inserted into a pipe whose paint is primed on the inner wall by a precursor. A brush portion is provided on the outer peripheral surface of the cylinder so as to be close to the inner wall portion of the pipe. The differential pressure generating device generates a pressure difference in the pipe in order to rotate the cylinder by the rotating blades while moving the cylinder along the pipe. The rope for operation is attached to the cylinder so as to be movable and adjustable. With the centrifugal force accompanying the rotation of the cylinder, the brush part is spread to the outer periphery and the paint is pressed against the inner wall part of the pipe.
The brush portion spreads to the outer periphery due to the centrifugal force and presses the paint against the inner wall portion of the pipe, so that a uniform paint layer is reliably formed on the inner wall portion of the pipe. As a result, it is possible to paint the pipes uniformly and evenly with a relatively simple operation such as feeding out and adjusting the movement of the cable body for operation. The work can be done quickly in a short time, the workability is improved, and the cost is advantageous.

(About Claim 2 and Claim 11)
A plurality of discharge holes are formed in the outer peripheral portion of the cylindrical body. For this reason, at the time of painting the pipe, the paint is discharged from the discharge hole to the inner wall of the pipe by centrifugal force due to the rotation of the cylinder, and is replenished to the inner wall of the pipe coated with the paint. At the same time, the brush portion spreads to the outer periphery due to centrifugal force, and the replenished paint is pressed against the inner wall portion of the pipe, so that a uniform paint layer is reliably formed on the inner wall portion of the pipe. As a result, the piping can be uniformly and uniformly applied to the pipes by a relatively simple operation such as feeding out or adjusting the movement of the rope for operation as in claim 1. Even if it is not a person, the painting work can be completed quickly in a short time, the workability is improved, and the cost is advantageous.

(About Claim 3 and Claim 12)
The cylinder is formed in a double cylinder shape from the outer cylinder and the inner cylinder so as to be inserted into the pipe, has a plurality of discharge holes in the outer peripheral portion, and has a plurality of rotor blades attached to the inside. Yes. The brush portion is provided on the outer peripheral surface of the outer cylinder so as to be close to the inner wall portion of the pipe. The differential pressure generating device generates a pressure difference in the pipe in order to rotate the cylinder by the rotating blades while moving the cylinder along the pipe. The rope for operation is attached to the cylinder so as to be movable and adjustable. The paint contained between the outer cylinder and the inner cylinder is discharged from the discharge hole to the inner wall of the pipe by centrifugal force accompanying the rotation of the cylinder, and the brush is spread to the outer periphery to spread the paint on the inner wall of the pipe. Press.
At the time of painting the pipe, the paint is surely adhered to the inner wall of the pipe because the paint is discharged from the discharge hole to the inner wall of the pipe by the centrifugal force generated by the rotation of the cylinder. At the same time, the brush portion is spread to the outer periphery by centrifugal force, and the adhered paint is pressed against the inner wall portion of the pipe, so that a uniform paint layer is reliably formed on the inner wall portion of the pipe. For this reason, the piping can be applied uniformly and evenly with a relatively simple operation such as feeding out and adjusting the cable for operation. Even if it is not an expert, the painting work can be done quickly and quickly. Therefore, workability is improved and the cost is advantageous.

(About claim 4 and claim 13)
At the time of painting, with the rotation of the cylinder, the brush portion is rotated in a direction away from the outer peripheral surface of the cylinder via the arm link due to centrifugal force. For this reason, since a brush part spreads to an outer periphery and presses a coating material, adjoining to the inner wall part of piping, coating can be effectively given to the inner wall part of piping.

(About Claim 5 and Claim 14)
Since the brush portion may be a woven fabric or a non-woven fabric twisted in a rope shape, it is possible to use a simple structure with an inexpensive material, which is advantageous in terms of cost.
(About Claim 6 and Claim 15)
Since the brush part may have a configuration in which a string or cloth is tied to the half loop-shaped rope part in a ribbon shape, a simple structure with an inexpensive material is sufficient, which is advantageous in terms of cost.

(About Claim 7 and Claim 16)
Since the brush portion is a vertically long roller provided in parallel with the cylindrical body, the coating can be reliably applied with a good finish with no coating failure or unpainted residue.
(About Claim 8 and Claim 17)
Since the brush portion is a vertical plate-like spatula provided in parallel with the cylindrical body, the coating can be reliably applied with a good finish with no coating failure or unpainted residue.

(About Claim 9 and Claim 18)
The upper and lower ends of the cylindrical body have rounded portions bent inward so as to be small in diameter. For this reason, even if the pipe is bent in a U-shape, the rounded portion works so as to change the direction at the bent portion of the pipe, so that the cylindrical body can pass through without being stagnated at the bent portion.

  At the time of painting, the cylinder is inserted into the pipe while adjusting the rope for operation, and the cylinder is rotated together with the rotor blades by the pressure difference in the pipe. The centrifugal force generated with the rotation of the cylinder causes the coating material to be discharged from the discharge hole to the inner wall portion of the pipe, and the brush portion spreads to the outer periphery to uniformly apply the coating material to the inner wall portion of the pipe.

A first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1 showing an example of a drain pipe of a building H such as an apartment house, the building H includes a ventilation pipe 1, a sewage main pipe 2 and a vertical pipe 3 as a pipe 7. The ventilation pipe 1, the sewage main pipe 2, and the main pipe 3 are communicated from the building horizontal main pipe 4 to the external fence 5. During cleaning of the pipe 7, deposits such as dust and scale that have flowed down from the pipe 7 are collected by the universal pipe rehabilitation vehicle (VacL machine) 6 while fluid such as air and pulverized water flows in the pipe 7. In this case, instead of the universal pipe rehabilitation vehicle 6, the fluid may be flowed into the pipe 7 using a compressed air supply device (not shown) such as a compressor.

  After the piping 7 is cleaned, from the viewpoint of durability and hygiene, a coating layer R having a predetermined thickness is formed by coating the inner wall portion 7a of the piping 7 using the piping lining device 9 shown in FIG. The pipe lining device 9 includes a parabolic precursor 9A inserted from one end side of the pipe 7 and a succeeding cylinder 8 connected by a wire 12 described later. A plurality of rotor blades 10 are attached to the upper surface opening of the cylindrical body 8, and a tufted string portion 11 such as a woven fabric or a nonwoven fabric twisted in a semi-loop rope is used as a brush portion on the outer circumferential surface in the circumferential direction. They are provided at predetermined angular intervals.

  Above and below the cylindrical body 8, a bundling ring portion 14 in which a plurality of rope portions 13 are bound and connected is provided. The upper binding ring portion 14 is connected to the precursor 9A via the turning ring portion 14a and the binding rope 14b, and the lower binding ring portion 14 hangs down from the turning ring portion 14a with the wire 12 as an operating cord. I am letting. A plurality of discharge holes 16 are formed in the outer peripheral surface of the cylinder 8 along the circumferential direction. The umbrella-shaped precursor 9A can be formed of a fabric such as a fiber having air permeability, or a canvas or a plastic sheet having a ventilation hole. Further, an annular flange base (not shown) may be formed at the lower end opening of the cylindrical body 8, and the paint P may be received by the flange base. Furthermore, the precursor 9A is not limited to a parabolic shape, but may be formed in a cup shape, a cone shape, a ball shape, a vase shape, a bowl shape, a parabolic shape, a hemispherical shape, a bottomed cylindrical shape, an abacus ball shape, or the like. .

  In order to apply the coating to the inner wall 7a of the pipe 7 based on the pipe lining method of the present invention, the precursor 9A and the cylinder 8 are inserted into one end of the pipe 7, and the wire 12 is fed from the lower turning ring 14a. Sag. Next, the coating material P is put into the head 9a of the precursor 9A in the pipe 7, and a fluid such as air, carbon dioxide or nitrogen gas is put into the pipe 7 by using a differential pressure generator (not shown) such as a compressor. To generate a positive pressure, or suck the pipe 7 to generate a negative pressure. When a negative pressure is generated in the pipe 7, the negative pressure acts on the precursor 9A and moves the precursor 9A upward. When the wire 12 is fed out by adjusting the movement of the precursor 9A in the upward direction, the head 9a of the precursor 9A scrapes the paint P and adheres it to the inner wall 7a of the pipe 7 for preliminary undercoating. Further, due to the negative pressure in the pipe 7, the fluid flowing in the pipe 7 sprays on the rotor blade 10 to form a working fluid that passes through the cylinder 8, and the cylinder 8 is driven to rotate by the rotor 10 and centrifuged. Generate power.

  At this time, the paint P that has fallen onto the subsequent cylinder 8 from between the inner wall 7a of the pipe 7 and the precursor 9A is discharged from the discharge hole 16 to the inner wall 7a of the pipe 7 by centrifugal force, and the paint P is undercoated. It is replenished to the inner wall part 7a of the pipe 7 made. At this time, the tufted string portion 11 spreads to the outer periphery due to the centrifugal force, is displaced in the proximity direction with respect to the inner wall portion 7a of the pipe 7, and presses the paint P against the inner wall portion 7a of the pipe 7 to spread. The paint layer R is reliably and uniformly formed on the inner wall 7a of the pipe 7. Coating can be applied over the entire length of the pipe 7 by feeding the wire 12 inside the pipe 7 or by handing it.

In this way, the pipe 7 can be applied uniformly and uniformly by a relatively simple operation such as feeding out or adjusting the movement of the wire 12 by hand, and the painting work can be performed quickly and quickly. Therefore, workability is improved and the cost is advantageous.
At this time, by forming rounded portions (not shown) having small diameters at the upper and lower end portions of the cylindrical body 8, even if the pipe 7 is bent into a V shape or a substantially V shape, 7 works so as to change the direction of the bent portion, so that the cylindrical body 8 can pass through without being stagnated at the bent portion. Further, the amount of paint P released can be adjusted by changing the pressure difference generated in the pipe 7 to change the rotational speed of the cylinder 8.

FIG. 3 shows a second embodiment of the present invention.
In the second embodiment, instead of the tufted string portion 11 of the first embodiment, a link structure including upper and lower arm links 17 and 18 and a vertically long roller 19 is provided in parallel with the cylindrical body 8 as a brush portion. The upper arm link 17 rotatably connects the cylinder 8 and the upper end of the roller 19 via pins 20 and 21, and the lower arm link 18 connects the cylinder 8 and the roller 19 via pins 20a and 21a. The lower end part of this is connected so that rotation is possible.

  At the time of painting, the cylinder 8 is rotated together with the rotary blade 10 by the working fluid generated by the pressure difference in the pipe 7. At this time, the roller 19 is rotated by the centrifugal force of the cylindrical body 8 so as to spread outward about the pins 20 and 20 a, and the roller 19 spreads to the outer periphery to press the paint against the inner wall portion 7 a of the pipe 7. As a result, the paint is applied with a good finish with no smearing or unpainted areas.

  FIG. 4 shows a third embodiment of the present invention. In the third embodiment, the brush portion can be advantageously configured with a simple structure and cost-effectively by tying a string or cloth as a ribbon 23 to the half loop-shaped rope portion 22.

  FIG. 5 shows a fourth embodiment of the present invention. In the fourth embodiment, a vertical plate-like spatula 24 is provided in parallel with the cylindrical body 8 in place of the roller 19 of the second embodiment. At the time of painting, the spatula 24 spreads to the outer periphery due to the centrifugal force of the cylindrical body 8 and presses the paint against the inner wall portion 7a of the pipe 7, so that the paint is applied with a good finish with no coating failure or unpainted residue. The spatula 24 can be formed of plastic, wood, sponge, feathers, thick cloth, or non-woven fabric.

  FIG. 6 shows a fifth embodiment of the present invention. In the fifth embodiment, a redundant folded string portion 25 is provided in place of the tuft string portion 11 of the first embodiment. At the time of painting, the broken string portion 25 spreads to the outer periphery by the centrifugal force of the cylindrical body 8 and presses the paint against the inner wall portion 7a of the pipe 7, so that the painting is performed with a good finish.

  FIG. 7 shows Embodiment 6 of the present invention. In the sixth embodiment, instead of the spatula 24 of the third embodiment, a bristles 27 are provided on the swing plate 26 to constitute a brush portion. At the time of painting, the flocked part 27 pushes the paint against the inner wall part 7a of the pipe 7 and extends it, so that the painting is performed with a good finish.

  FIG. 8 shows a seventh embodiment of the present invention. Example 7 differs from Example 1 in that after coating the coating P on the inner wall portion 7a of the pipe 7, the wire 12 is connected to the upper turning ring portion 14a and the cylinder 8 is suspended while the pipe 8 is suspended. It is to be inserted. For example, the differential pressure generator is used as a VacL machine, and the paint P sucked into the pipe 7 is pressed onto the inner wall portion 7a by wind pressure to perform undercoating. Thereafter, the cylindrical body 8 is inserted into the pipe 7, and the rotary blade 10 receives wind pressure to rotate the cylindrical body 8. By the rotation of the cylindrical body 8, the tuft 11 is pressed by the tuft 11 while replenishing the inner wall 7 a to which the paint P is primed in the same manner as in the first embodiment. Alternatively, the cylinder 8 may be inserted into the pipe 7 in advance, and the paint P may be sucked into the pipe 7 by the VacL machine following the cylinder 8 to undercoat the inner wall portion 7a.

  FIG. 9 shows Embodiment 8 of the present invention. The difference between the eighth embodiment and the seventh embodiment is that the cylindrical body 8 is inserted into the pipe 7 while undercoating the coating P on the inner wall 7a of the pipe 7. For example, the differential pressure generator is used as a VacL machine, and the coating material P sucked into the pipe 7 is pressed onto the inner wall portion 7a by wind pressure for undercoating, and at the same time, the cylindrical body 8 is inserted into the pipe 7. By the rotation of the cylindrical body 8, the tuft 11 is pressed by the tuft 11 while replenishing the inner wall 7 a to which the paint P is primed in the same manner as in the first embodiment.

  FIG. 10 shows Embodiment 9 of the present invention. The difference between Example 9 and Example 1 is that the precursor 9A of Example 1 is omitted, the cylinder 8 is formed into a double cylinder from the outer cylinder 8a and the inner cylinder 8b, and the wire 12 is turned upward. This is because the cylindrical body 8 is suspended by being connected to the ring portion 14a. The inner cylinder 8b to which the rotor blades 10 are attached and the outer cylinder 8a provided with the tufted string portion 11 are connected by an annular flange portion 30 at the bottom to form a paint chamber 31.

  At the time of painting, based on the pipe lining method of the present invention, the paint P is accommodated in the paint chamber 31, inserted into the pipe 7, and the working fluid is sprayed onto the rotary blade 10, thereby the cylindrical body 8 together with the rotary blade 10. Is driven to rotate. Therefore, the paint P in the paint chamber 31 is discharged from the discharge hole 16 to the inner wall portion 7 a of the pipe 7 and adheres to the inner wall portion 7 a of the pipe 7. At this time, the tuft portion 11 spreads to the outer periphery due to centrifugal force, and the paint P is pressed against the inner wall portion 7a in the vicinity of the inner wall portion 7a of the pipe 7 so as to spread, so that the inner wall portion 7a is uniformly and reliably coated. Layer R is formed.

(Modification)
The precursor 9A in the first to sixth embodiments may have a structure in which a plurality of precursors are connected instead of a single one. When the precursor 9A is a solid body such as a ball shape, a hemispherical shape, or an abacus ball shape, the precursor 9A may be provided as a continuation of the cylindrical body 8 instead of the starting material. The precursor 9A may advance in the pipe 7 in a non-rotating state, may be driven to rotate in conjunction with the cylinder 8, or may be rotated separately from the cylinder 8. It may be. In this case, the rotation of the precursor 9A and the rotation of the cylinder 8 may be in the same direction or in opposite directions.

In Example 7 thru | or Example 9, instead of the tuft string part 11, the link structure described as a brush part in Example 2 thru | or Example 6, the ribbon 23 of the rope part 22, the spatula 24 of a vertical plate shape, a broken string part 25 or the flocked portion 27 of the swinging plate 26 may be attached to the cylinder 8.
In the first to eighth embodiments, the discharge hole 16 is provided in the cylindrical body 8, but the cylindrical body 8 may be a non-porous shape in which the discharge hole 16 is not provided. In this case, even if the cylindrical body 8 generates centrifugal force due to rotation, the paint P is not released from the discharge hole 16, so that the paint P undercoated on the inner wall portion 7 a of the pipe 7 by the precursor 9 A remains as it is. It is pressed by the brush and painted.
In the first to ninth embodiments, the operation of inserting the tubular body 8 into the pipe 7 may be repeated a plurality of times so that the coating is divided into intermediate coating, top coating, finish coating, and the like.

The inner cylinder 8b according to the ninth embodiment may be formed in an inverted truncated cone shape or a drum shape so that the volume of the paint chamber 31 is increased.
The pipe 7 includes a drain pipe, an air conditioning duct, an exhaust duct (industrial duct, kitchen duct), and the like, and may be any pipe that needs to be coated inside the pipe 7. The cylinder 8, the rotary blade 10, and the roller 19 can be formed of wood or a plastic material including metal such as wood, aluminum, steel, and copper. In addition, in concrete implementation of this invention, it can change variously in the range which does not deviate from the summary of this invention.

It is the schematic which shows the piping example of the drain pipe of buildings, such as an apartment house (Example 1). (Example 1) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 2) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 3) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 4) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 5) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 6) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 7) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 8) which is a perspective view of the piping lining apparatus which shows a use condition. (Example 9) which is a perspective view of the piping lining apparatus which shows a use condition.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vent pipe 2 Sewage main pipe 3 Stand main pipe 4 Building horizontal draw main pipe 7 Piping 7a Inner wall part 8 Tubular body 8a Outer cylinder 8b Inner cylinder 9 Piping lining device 9A Precursor 9a Head part 10 Rotary wing 11 Tuft string part ( Brush part)
12 wire (strand body)
16 Discharge hole 17 Upper arm link (arm link)
18 Lower arm link (arm link)
19 Roller (brush part)
22 Tight part (brush part)
23 Ribbon (brush part)
24 Spatula (brush part)
25 Folded string part (brush part)
26 Swing plate (brush part)
27 Flocked part (brush part)
P paint R paint layer

Claims (18)

A cylindrical body provided with a coating material to be inserted into a pipe whose primer is primed on the inner wall by a precursor,
A brush portion provided on the outer peripheral surface of the cylindrical body so as to be capable of being displaced close to the inner wall portion of the pipe;
A differential pressure generating device for generating a pressure difference in the pipe in order to rotate the cylinder by the rotary blades while moving the cylinder along the pipe;
A strip for operation attached to the cylinder so as to be movable and adjustable,
A piping lining apparatus, wherein the brush portion is spread to the outer periphery by a centrifugal force accompanying the rotation of the cylindrical body, and the paint is pressed against the inner wall portion of the piping.   A plurality of discharge holes are formed in the outer peripheral portion of the cylindrical body, and the paint falling from the upper part of the pipe to the cylindrical body is caused by centrifugal force accompanying the rotation of the cylindrical body to cause an inner wall portion of the pipe from the discharge hole The piping lining device according to claim 1, wherein the brush lining is spread to an outer periphery and the coating is pressed against the inner wall of the piping. A cylindrical body that is formed so as to be inserted into the pipe by being formed into a double cylinder shape from the outer cylinder and the inner cylinder, has a plurality of discharge holes in the outer peripheral portion, and has a plurality of rotor blades attached therein.
A brush portion provided on the outer peripheral surface of the outer cylinder so as to be able to be moved close to the inner wall portion of the pipe;
A differential pressure generating device for generating a pressure difference in the pipe in order to rotate the cylinder by the rotary blades while moving the cylinder along the pipe;
A strip for operation attached to the cylinder so as to be movable and adjustable,
The paint accommodated between the outer cylinder and the inner cylinder is discharged from the discharge hole to the inner wall portion of the pipe by the centrifugal force accompanying the rotation of the cylinder, and the brush portion is spread to the outer periphery to paint. A piping lining device characterized in that is pressed against the inner wall of the piping.   The piping lining device according to any one of claims 1 to 3, wherein the brush portion is connected to the cylindrical body via an arm link so as to be capable of rotating in proximity.   The piping lining device according to any one of claims 1 to 4, wherein the brush portion is made of a woven fabric or a nonwoven fabric twisted in a rope shape.   The piping lining device according to any one of claims 1 to 4, wherein the brush portion is formed by tying a string or cloth in a ribbon shape to a half-loop-shaped rope portion.   The piping lining device according to any one of claims 1 to 4, wherein the brush portion is a vertically long roller provided in parallel with the cylindrical body.   The pipe lining device according to any one of claims 1 to 4, wherein the brush portion is a vertical plate-like spatula provided in parallel with the cylindrical body.   The pipe lining device according to any one of claims 1 to 4, wherein both upper and lower end portions of the cylindrical body have rounded portions bent inward so as to have a small diameter. . A step of inserting a cylindrical body with a rotor attached inside into a pipe in which paint is primed on the inner wall by a precursor;
A step of providing a brush portion on the outer peripheral surface of the cylinder so as to be close to the inner wall portion of the pipe, and the cylinder by the rotary blade while moving the cylinder along the pipe by a differential pressure generator. Creating a pressure difference in the pipe to rotate the body;
And a step of attaching a cable for operation to the cylinder so as to be movable and adjustable,
A piping lining method, wherein the brush portion is expanded to the outer periphery by a centrifugal force accompanying the rotation of the cylindrical body, and the paint is pressed against the inner wall portion of the piping.   A plurality of discharge holes are formed in the outer peripheral portion of the cylindrical body, and the paint falling from the upper part of the pipe to the cylindrical body is caused by centrifugal force accompanying the rotation of the cylindrical body to cause an inner wall portion of the pipe from the discharge hole The piping lining method according to claim 10, wherein the brush portion is expanded to an outer periphery and the coating material is pressed against the inner wall portion of the piping. A step of inserting into the pipe a cylindrical body that is formed in a double cylinder shape from the outer cylinder and the inner cylinder, has a plurality of discharge holes in the outer peripheral portion, and has a plurality of rotor blades attached therein;
A step of displacing the brush portion in proximity to the inner wall portion of the pipe on the outer peripheral surface of the outer cylinder; and
A step of causing a pressure difference in the pipe to rotate the cylinder by the rotary blade while moving the cylinder along the pipe by a differential pressure generator;
A step of attaching to the cylinder so as to be movable and adjustable by a rope for operation,
The paint accommodated between the outer cylinder and the inner cylinder is discharged from the discharge hole to the inner wall portion of the pipe by the centrifugal force accompanying the rotation of the cylinder, and the brush portion is spread to the outer periphery to paint. A piping lining method characterized in that is pressed against the inner wall of the piping.   The piping lining method according to any one of claims 10 to 12, wherein the brush portion is connected to the cylindrical body via an arm link so as to be capable of rotating in proximity.   The pipe lining method according to any one of claims 10 to 13, wherein the brush portion is made of a woven fabric or a non-woven fabric twisted in a rope shape.   The pipe lining method according to any one of claims 10 to 13, wherein the brush part is formed by binding a string or a cloth in a ribbon shape to a semi-looped rope part.   The pipe lining method according to any one of claims 10 to 13, wherein the brush portion is a vertically long roller provided in parallel with the cylindrical body.   The pipe lining method according to any one of claims 10 to 13, wherein the brush portion is a vertical plate-like spatula provided in parallel with the cylindrical body.   The pipe lining method according to any one of claims 10 to 13, wherein both upper and lower ends of the cylindrical body have rounded portions bent inward so as to have a small diameter. .

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