JPS63254026A - Technique for repairing pipeline - Google Patents

Abstract

PURPOSE:To permit the sending of the upstream side liquid of a repairing pipe to downstream side through the repairing pipe during the period of repairing work of the repairing pipe, by a method wherein a passage, communicating an upstream side pipeline with a downstream side pipeline through plug members provided in both of the pipelines, is provided through the inside of a flexible pipe. CONSTITUTION:In pipeline repairing work, in which thermosetting resin, applied into a sheath pipe 2, is cured by heat and a rigid lining pipe is formed in a repairing pipe 11b, drainage in the upstream pipe 11a of a drainage pipe 11 is sucked by the suction 20a of a bypass pump 20 through the pipe 14a of an air plug 14 and a bypass hose 19 by the bypass pump 20, further, the drainage arrives at a pipe 15a of the air plug 15 from the delivery 20b of the bypass pump 20 through an upstream side bypass hose 6, provided through the inside of a flexible pipe 1 advanced while being turned in the repairing pipe 11b, a fitting 4 for changing water and a downstream side bypass hose (passage) 7, thereafter, is sent into a downstream pipe 11c from said pipe 15a. Accordingly, the repairing works can be carried out without exposing the bypass hose or the like on the ground.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a repair method for aging pipes such as water and sewer pipes, tunnels, and various conduits.

(Prior art) When conduits buried underground, such as sewer pipes, tunnels, and other conduits become obsolete, there are already methods in practical use for repairing these conduits without digging them up (for example, , Special Publication No. 55-43890, Special Publication No. 58-396
(See Publication No. 46).

These construction methods use flexible pipes with a curable resin-impregnated layer to form rigid lined pipes within aging pipelines. By the way, this construction method is used for underground pipes,
When carrying out construction work, it is necessary to stop the fluid flowing through the pipe line that forms the rigid lined pipe, that is, the pipe line in the section to be repaired (hereinafter referred to as the repair pipe), and the upstream and downstream sides of the repair pipe must be stopped. A bypass method is required to install a connecting bypass hose. This bypass construction method is constructed as follows. First, plug members for stopping fluid are provided in the upstream and downstream channels of the repair pipe in a liquid-tight manner. Next, a bypass hose is connected between the upstream plug member and the suction side of the bypass pump installed on the ground so that the upstream plug member sends the fluid stored in the upstream conduit to the ground.

Further, a bypass hose passing above ground is connected between the delivery side of the bypass pump and the downstream plug member.

Then, the liquid stored in the upstream pipe is sent to the downstream pipe by a bypass pump through these bypass hoses that pass above ground.

(Problems to be Solved by the Invention) However, in this bypass construction method, various inconveniences arise because the bypass hose passes through the ground. That is, since the bypass hose passes above the ground, it may obstruct traffic if there are roads or private houses nearby, and damage to the bypass hose may cause concerns about safety, such as hygiene.

In addition, if the repaired pipe passes under railway lines, rivers, etc., there are problems such as it is impossible to pass the bypass hose over the railway, or it is difficult to pass the bypass hose over the river etc. will occur.

The present invention has been made in view of the above circumstances, and provides a pipeline repair method that allows fluid on the downstream side of the repaired pipe to be sent downstream through the repaired pipe even during the repair work of the repaired pipe. The purpose is to

(Means for solving the problems) In order to solve the above problems, the pipeline repair method of the present invention
In a pipe repair method that uses a flexible pipe having a curable resin-impregnated layer to form a rigid lined pipe in the pipe, the upstream pipe and the downstream pipe of the pipe forming the rigid lined pipe are Plug members are provided to stop the fluid in both of these pipes, and a passage is provided in the flexible pipe to communicate between these square pipes through the two company members, and the fluid in the upstream pipe is closed. It is configured to flow down into the downstream pipe line via the passage.

(Function) According to the above configuration, during the pipe repair work in which a rigid lined pipe is formed in the pipe using a flexible pipe having a curable resin impregnated layer, the fluid in the upstream pipe is and flows down into the downstream pipe line via a passage provided through the flexible pipe.

(Example) Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a sectional view showing a flexible pipe having a curable resin-impregnated layer used in the pipeline repair method of the present invention, and FIG. 2 is a sectional view taken along line II--II in FIG. 1. In both figures, 1 indicates a flexible tube having a curable resin-impregnated layer (hereinafter simply referred to as flexible tube), and the flexible tube 1 has a thermosetting resin-impregnated layer such as felt. Resin-impregnated sheath tube 2
and a protective tube 3 that surrounds the sheath tube 2 over substantially the entire outer periphery and is impermeable to fluids. Incidentally, the sheath pipe 2 is formed with a bent part 2a as shown in FIG. 2, and this bent part 2a is formed on the outside when the flexible pipe 1 moves forward inside the sewer pipe 11, which will be described later, while being turned inside out. This is provided to make the inner sheath tube 2 larger in diameter than the inner protection tube 3 so that it can be easily turned over.

The flexible tube 1 is firmly attached to one end 1a in a liquid-tight manner by a water change fitting 4 or a seal clamp 5. An upstream bypass hose (passage) 6 is firmly and liquid-tightly attached to one end 4a of the water change fitting 4, and the other end 4
A downstream bypass hose (passage) 7 is firmly attached to b in a liquid-tight manner. Further, one end portion 1a of the flexible tube 1
A U*-shaped mounting member lO to which the lobe 8 and the hot water pipe 9 are attached is fixed to.

FIG. 3 is a cross-sectional view showing the installation state of a sewer pipe to which the pipe repair method of the present invention is applied, and the sewer pipe (pipe line) 11 is composed of an upstream sewer pipe (hereinafter simply referred to as an upstream pipe) 11a and a repair sewer pipe. It consists of a llb (hereinafter simply referred to as a repair pipe) and a downstream sewer pipe (hereinafter simply referred to as a downstream pipe) llc. Manholes 12 and 13 are provided between the upstream pipe 11a and the repair pipe 11b and between the repair pipe 11b and the downstream pipe 11c.

In order to repair the repair pipe 11b of the sewer pipe 11 as described above, first, air plugs with vibrators 14a and 15a are attached to the downstream end of the upstream pipe 11a and the upstream end of the downstream pipe 11c approximately in the center in the flow direction. (Plug members) 14 and 15 are provided, respectively. High pressure air is sent to the air plugs 14 and 15 by a compressor 18 via air pipes 16 and 17.
is the sewage in the upstream pipe 11a and the downstream pipe 11C or the repair pipe 1
It is designed so that it does not flow into 1b. The pipe 14a of the air plug 14 is a bypass hose 19 (passage).
The delivery 20b of the bypass pump 20 is connected to the upstream bypass hose 6. Further, the downstream bypass hose 7 is connected to a pipe 15a of the air plug 15. That is, the upstream pipe 11a and the downstream pipe 11c are communicated by a bypass hose 19, a bypass pump 20, and upstream and downstream bypass hoses 6 and 7 provided through the flexible pipe 1. In this state, the flexible tube l passes through the inversion pipe 21 and the rigid guide pipe 22 from the other end 1b side, and is folded back from the other end 1b to guide the guide pipe 22. Wraps the outer peripheral surface of one end of the pipe 22. Seal clamp 2 is attached to this folded part.
3 is attached, and by this seal clamp 23, the other end 1b of the flexible tube 1 and the guide vibe 22 are firmly attached in a liquid-tight manner.

Next, when water is injected into the inversion pipe 21 by the water supply unit A, the flexible pipe 1 is turned over inside the repair pipe 11b and moved forward (toward the right in FIG. 3) due to the water pressure.
Rope 8 to prevent the flexible tube from rapidly turning over and moving forward.
The brake is applied to prevent the flexibility y1 from breaking. And flexible! When the water in the inversion pipe 21 has been inserted into the repair pipe 11b, the water in the inversion pipe 21 is sent to the water inlet of the boiler car 26 via the hose 25 by the submersible pump 24, and the boiler car 26 is heated to the set temperature. This hot water is converted into hot water and flows from the hot water supply port of the boiler car 26 to the hot water pipe 9.
into the flexible tube l.

In this way, the cold water inside the flexible tube 1 is heated, and as a result, the thermosetting resin impregnated in the sheath tube 2 is thermosetted and the repaired tube 1 is heated.
A rigid lined tube is formed within 1b.

Note that 27 indicates a float, and this float 27 is attached to the upstream bypass hose 6, and the float 27 is attached to the upstream bypass hose 6.
The thermosetting resin impregnated in the sheath pipe 2 is cooled by the sewage water flowing inside the upstream bypass hose 6 while being kept floating in the sheath pipe 2, and does not prevent the thermosetting resin from thermosetting. This is to ensure that.

During the pipeline repair work as described above, the upstream pipe 1 of the sewer pipe 11
The sewage in 1a is sucked into the suction 20a of the bypass pump 20 by the bypass pump 20 via the pipe 14a of the air plug 14 and the bypass hose 19, and the sewage is further transferred from the delivery 20b of the bypass pump 20 into the repair pipe 11b. It reaches the pipe 15a of the air plug 15 via the upstream bypass hose 6, the water change fitting 4, and the downstream bypass hose (passage) 7, which are passed through the flexible pipe l that is turned upside down and advances. , the pipe 1
5a to the downstream pipe 11c. Therefore, during the pipe line repair work as described above, the repair work within the repair pipe 11b can be performed without bringing the bypass hose or the like above the ground.

In the explanation of this embodiment, the bypass hose 7 is connected between the water change fitting 4 and the pipe 15a in Fig. 7S3, but if the diameter of the sewer pipe 11 is small, the bypass hose is connected. 7 is water change fitting 4 and pipe 15
a, that is, the bypass pump 20
Do not operate the sewage in the upstream pipe 11a with the air plug 1.
After inserting the flexible pipe l into the repair pipe 11b as shown in FIG. Connect between. After that, start operating the bypass pump 20,
The sewage in the upstream pipe 11a flows down into the downstream pipe 11c.

Further, in the embodiment shown in FIG. 5, the sewage in the upstream pipe 11a is sent into the downstream pipe 11c without providing the bypass pump 20. That is, the pipe 14a of the air plaque 14 and one end of the branch pipe 30 provided in the guide vibe 11 are connected by the bypass hose 19, and the other end of the branch pipe 30 located inside the guide pipe 22 is connected to the upstream bypass hose 6. It is connected to the water change fitting 4 by.

With this configuration, the sewage in the upstream pipe 11a is transferred to the pipe 14a, the bypass hose 19. It flows down into the downstream pipe 11c via the branch pipe 30, the upstream bypass hose 6, the water exchange fitting 4, the downstream bypass hose 7, and the pipe 15a of the air plug 15. This embodiment can be applied when the sewer pipe 11 has a sufficient hydraulic gradient.

(Effects of the Invention) As detailed above, the pipe repair method of the present invention stops the fluid in both the upstream and downstream pipes of the pipe forming the rigid lined pipe. Plug members are respectively provided, and these two pipes are provided in a flexible pipe which is a passage communicating through both frame members, and the fluid in the upstream pipe is connected to the downstream pipe through the passage. It is designed to flow inside.

Therefore, during pipeline repair work in which a flexible pipe is used to form a rigid lined pipe inside the pipe, fluid in the upstream pipe is passed through the flexible pipe to the downstream pipe. Because it can flow down into the pipeline, there is no need to extend the passageway for the fluid in the upstream pipeline to the outside of the pipeline in the repaired section, which prevents traffic from being obstructed and secondary disasters due to damage and scratches. Without doing anything.

Further, even if there are railroad tracks, rivers, etc., it is possible to easily perform conduit repair work.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, and FIG. 1 is a sectional view showing a flexible pipe having a curable resin impregnated layer used in the pipeline repair method of the present invention, and FIG. II-I
3 is a sectional view taken along line I, FIG.
FIG. 5 is a cutaway view showing another embodiment of the present invention. l... Flexible pipe, 6, 7.19... Bypass hose (passage), 11... Sewer pipe (pipe line), lla...
Upstream sewer pipe (upstream pipe), llb... repair sewer pipe (pipe forming a rigid lined pipe), llc... downstream sewer pipe (downstream pipe), 14.15... Air plug (plug member).

Claims (1)

[Claims] In a pipe repair method that uses a flexible pipe having a curable resin-impregnated layer to form a rigid lined pipe in the pipe, the upstream pipe and the downstream pipe of the pipe forming the rigid lined pipe are A plug member is provided to stop the fluid in both of these pipes, and a passage is provided in the flexible pipe to communicate between the two pipes via the plug members, and the fluid in the upstream pipe is closed. A pipe repair method characterized in that the water flows down into the downstream pipe through the passage.