JPS61263679A - Method for lining inner surface of pipeline - Google Patents

Abstract

PURPOSE:To line the inner surface of a pipeline efficiently by lining the inner surface of a large bore part with a large bore body, simultaneously introducing a lining material and a small bore body into the small bore part and lining the inner surface of the small bore part with the small bore body. CONSTITUTION:A liq. lining material 2, a large bore body 3 and a small bore body 4 are charged from the large bore part 1a side, the body 4 is placed in the lining material 2 and a towing line 5 is connected to the body 3. The inner surface of the part 1a is coated with the lining material by the movement of the body 3 due to the fluid pressure and the lining material 2 and the body 4 are forced into the small bore part 1b. Then the body 3 is pulled back by the towing line 5 to take out the body 3 from the part 1a and then the inner surface of the small bore part is lined with the lining material by the movement of the body 4 due to the fluid pressure. Consequently, the inner surface of a pipeline having a large bore and a small bore part can be lined by the body while the cut parts of the pipeline are reduced.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a method for placing a liquid lining material and lining large-diameter and small-diameter objects into a pipe having a large-diameter portion and a small-diameter portion,
The present invention relates to a method in which the objects are moved within the pipe by fluid pressure, and the lining material is swept away by the objects and applied to the inner surface of the pipe.

[Conventional technology]

Conventionally, as shown in FIG. 2, the large-diameter portion (1a) and the small-diameter portion (1b) are cut at appropriate positions commensurate with the lining processing area, and the large-diameter portion (1a) and the small-diameter portion (1b) are cut.
1b), and only the large-diameter object (3) is placed in the large-diameter portion (1a), and the small-diameter object (3) is placed in the small-diameter portion (lb).
4) respectively, and separate the large diameter part (1a) and the small diameter part (
1b) were individually lined.

[Problem that the invention seeks to solve]

However, the pipe (1) had to be cut at three places,
Cutting and restoring the pipe (1) requires a lot of effort, time, and expense, especially when the pipe (1) is buried, for excavation and backfilling work that requires a lot of cost. , the workload became even greater, and there was room for further improvement.

An object of the present invention is to enable inner lining of a pipe having a large diameter portion and a small diameter portion with an object while reducing the number of pipe cutting points.

[Means for solving problems]

The characteristic means of the present invention is that the liquid lining material and the large-diameter and small-diameter objects are connected to the large-diameter object while the small-diameter object is contained in the liquid lining material and the rigging is connected to the large-diameter object. The lining material is applied to the inner surface of the large portion by the movement of the large diameter object by the fluid pressure, and the lining material and the small diameter object are The large diameter object is pushed into the small diameter portion, and then the large diameter object is removed from the large diameter portion by being pulled back by the rigging, and the lining material is applied to the inner surface of the small diameter portion by movement of the small diameter object due to fluid pressure. Its purpose is to carry out the following operations and effects:

[For production]

In other words, first, the inner surface of the large-diameter part is lined with a large-diameter object, and at the same time, the lining material and the small-diameter object are introduced into the small-diameter part, and after the large-diameter object is pulled out with the rigging, the small-diameter part is lined with the small-diameter object. By performing the inner lining treatment, it has become possible to successfully perform the inner lining treatment using an object on a pipe having a large diameter portion and a small diameter portion, without having to cut the pipe at the boundary between the large diameter portion and the small diameter portion.

〔Effect of the invention〕

As a result, the number of pipe cutting points can be reduced compared to conventional methods, and pipe cutting and restoration work can be performed easily, quickly, and at low cost.
In particular, when pipes are buried, excavation and backfilling work can be carried out easily, quickly and at low cost, making pipe repair extremely advantageous in terms of both workability and cost; [Example] ] Next, an example will be shown with reference to FIG.

As shown in Figure 1 (a), a pipe (1) having a large diameter portion (1a) and a small diameter portion (1b) is lined in a manner appropriate to the lining treatment range in each of the large diameter portion (1a) and small diameter portion (1b). Cut and open at an appropriate location.

Then, appropriate amount of lining material (2), large diameter part (1a)
A large diameter object (3) with an appropriate diameter commensurate with the inner diameter and lining thickness of the small diameter part (1b), a double spherical small diameter object (4) with an appropriate diameter commensurate with the inner diameter and lining thickness of the small diameter part (1b), The object (4) is placed inside the large diameter portion (1a) while being inside the lining material (2).

Further, a suitable rigging (5) such as a wire is extended from the reel (6) and connected to the large diameter object (3), and the lid body (7) passing through the rigging (5) is connected to the large diameter portion (1a). ) and blower (8
) to the lid (7).

Thereafter, the large-diameter object (3) is moved by air pressure from the blower (8), and the lining material (2) is swept away by the large-diameter object (3) together with the small-diameter object (4) to the inner surface of the large-diameter portion (1a). Apply.

As shown in Figure 1 CU), at the same time as completing the inner lining of the large diameter section (1a), the lining material (2) and the small diameter object (4) are pushed into the small diameter section (1b).

Thereafter, the rigging (5) is pulled back and the large diameter object (3) is removed from the large diameter portion (1a).

Thereafter, as shown in Fig. 1 (c), the small-diameter object (4) is moved by air pressure from the blower (8), and the small-diameter object (4) is
The lining material (2) is washed away and the small diameter part (1b
) on the inner surface.

When the lining process of the small diameter portion (1b) is completed, the excess lining material (2) and the small diameter object (4) are collected from the small diameter portion (1b), the lid body (7) and the blower (8) are removed,
Reconnect piping (1).

[Another example]

Next, another embodiment will be described.

The lining material (2) may be of a room temperature curing type, a thermosetting type, or any other type.

The shapes of objects (3) and (4) may be monospherical, bullet-shaped, etc.
It can be transformed into other appropriate shapes, and objects (3), (4)
The material, structure, etc. can be selected as appropriate.

The type of fluid used to move the objects (3), (4) may be any gas or liquid.

The target pipe (1) is generally an existing pipe for city gas, natural gas, water supply, etc., and a buried pipe is particularly suitable, but any other pipe may be used.

[Brief explanation of the drawing]

FIGS. 1(a) to 8) are conceptual diagrams showing embodiments of the present invention, and FIG. 2 is a conceptual diagram of a conventional example. (1)...Piping, (1a)...Large diameter part, (1b)...Small diameter part, (2)...
・Lining material, (3)...Large diameter object, (4)
...small diameter objects, (5) ... rigging.

Claims (1)

[Claims] Piping having a large diameter portion (1a) and a small diameter portion (1b) (
1) Put liquid lining material (2) and large and small diameter objects for lining (3) and (4) into
, (4) within the pipe (1) by fluid pressure;
A method in which the lining material (2) is swept away by the objects (3) and (4) and applied to the inner surface of the pipe (1), the liquid lining material (2) being applied from the large diameter portion (1a) side. and both objects (3) and (4), with the small diameter object (4) contained in the liquid lining material (2), and connecting the rigging (5) to the large diameter object (3). When the large diameter object (3) is moved by the fluid pressure,
A lining material is applied to the inner surface of the large portion (1a), and the lining material (2) and the small diameter object (4) are pushed into the small diameter portion (1b), and then the rigging (5 ) to remove the large-diameter object (3) from the large-diameter portion (1a), and then apply the lining material to the inner surface of the small-diameter portion (1b) by moving the small-diameter object (4) using fluid pressure. A method of lining the inner surface of piping.