JPS6123035B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for applying a liquid lining material supplied into a pipe to the inner wall surface of the pipe using an object that moves within the pipe.

To implement the above method, conventionally, for example, JP-A-51
- As shown in Publication No. 86545, an amount of liquid lining material sufficient to coat the entire inner surface of the pipe is supplied at once, and a large amount of the lining material is pressed and moved in the longitudinal direction and circumferential direction of the pipe using a moving object. Ta. However, in this case, the resistance to the movement of the object becomes large, especially in the initial stage, and a powerful device is required to move the object, and the moving speed of the object changes rapidly and frequently, causing the liquid lining to adhere to the inner wall surface of the pipe. There were disadvantages such as uneven thickness of the material and inability to handle long pipes or high-viscosity lining materials.

An object of the present invention is to eliminate the above-mentioned drawbacks all at once by making it possible to significantly reduce the movement resistance of objects.

The characteristic means of the present invention is to fill the pipe with a liquid lining material before moving an object inside the pipe, and to discharge the surplus of the filled liquid lining material from the pipe, so that the liquid lining material adheres to the inner wall surface of the pipe. The purpose is to make the thickness uniform by moving the object, and its effects are as follows.

In other words, the liquid sealing material can be thinly and reliably adhered to the entire inner wall surface of the pipe by filling the pipe and letting the excess flow out, and the thinly deposited liquid lining material can be uniformly thickened by an object. Therefore, the movement resistance of the object caused by the liquid lining material can be significantly reduced and kept almost constant compared to the above-mentioned conventional method.

As a result, it has become possible to move objects within the pipe easily and always at a nearly constant speed using simple equipment, and it has become possible to reliably and easily apply a lining of uniform thickness. Also, even if
It has become possible to easily and reliably apply good linings to long pipes or with high viscosity liquid lining materials.

Next, embodiments of the present invention will be described with reference to illustrative drawings.

The inner surface of the pipe 1 to be treated has been previously treated to remove oil, dirt, etc. by passing an object through it, and a branch pipe 3 and a pipe 1 are connected to one end of the pipe 1 and communicated with the lining material supply device 2. A lid that connects an extension pipe 5 for storing an object 4 to be moved inside and a lid 7 communicating with a pressurized gas supply device 6, and has a branch pipe 8 for degassing and a lining material discharge path 9 on the other end side. Connect the body 10.

First, the liquid lining material 11 from the supply device 2
The excess lining material is then taken out from the discharge passage 9 and collected in the container 12. after that,
The object 4 is moved within the tube 1 by gas pressure from the supply device 6, and the excess lining material 11 is discharged while leaving the lining material 11a adhered in an appropriate amount uniformly over the entire inner surface of the tube 1. It is taken out from channel 9 and collected in container 12.

If a naturally hardening material is used as the liquid lining material 11, leave it as it is,
If a thermosetting type is used, hot air is supplied into the tube 1, and if a two-component reaction curing type is used, a polymerizing agent is supplied, or if a photopolymerizable or ultraviolet polymerizable type is used, the hot air is supplied into the tube 1. A suitable hardening treatment device is passed through the pipe 1, and the lining material 11 is hardened as necessary.

The excess lining material 11 may be discharged by natural flow or pump discharge, or an object 4 whose main purpose is to discharge the surplus material may be passed through the pipe 1.

The present invention is suitable for the inner surface treatment of pipes 1 that have many bends and branches, such as various existing pipes for city gas, natural gas, petroleum, water, etc.; Applicable to

As the liquid lining material 11, in addition to those mentioned above, various known materials such as non-drying materials can be used.

Various methods such as a self-propelled type and a towed type can be used to move the object 4 for application, for discharging excess lining material, or for both purposes.

[Brief explanation of the drawing]

The drawings show an embodiment of the method for coating the inner surface of a tube according to the present invention, and FIGS. 1A and 1B are schematic explanatory diagrams showing the procedure. 1...Pipe, 4...Object, 11...Liquid lining material.

Claims (1)

[Claims] 1 The liquid lining material 11 supplied into the pipe 1,
A method of coating the inner wall surface of a tube 1 with an object 4 that moves inside the tube 1, in which the liquid lining material 11 is filled into the tube 1 before the object 4 moves, and the filled liquid lining is applied. Material 11
A method for coating the inner surface of a tube, in which a surplus portion is discharged from the tube 1, and the liquid lining material 11 adhering to the inner wall surface of the tube 1 is made uniform in thickness by moving the object 4.