JP2020090059A - Pipeline repair system and repair method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipeline repair system capable of rapidly heating a lining material while suppressing energy consumption.
SOLUTION: A pipeline repair system 1 repairs a concrete tubular pipeline using a lining material 2. This pipeline repair system 1 includes a proximal socket 20 connected to a proximal side of the pipeline 10, a superheated steam delivery device 21 connected to the proximal socket 20 for delivering pressurized superheated steam, and a pipe. A tubular tip socket 23 connected to the tip side of the channel 10 and having an inner diameter that decreases toward the tip, and a thermosetting fiber-composite resin tube for repairing the inner peripheral surface of the channel 10. When the superheated steam is sent from the superheated steam delivery device 21 in a state where the striped lining material 2 is not heated, the lining material 2 is pressed from the inside to the inner peripheral surface of the pipeline 10 by the superheated steam. While being heated, it is hardened while being in close contact with the inner peripheral surface of the conduit 10.
[Selection diagram] Figure 2

Description

The present invention relates to a repair system for repairing a tubular pipe made of concrete. More specifically, the present invention relates to a repair system and a repair method for repairing an aged concrete pipeline using a thermosetting lining material.

Conventionally, in the irrigation canals and sewer pipes, the mortar part on the inner peripheral surface of the pipes is gradually scraped off by the collision and sanding action of running water or fine sand, resulting in a rough surface with irregularities. As it progresses, aggregates fall off and the duct cross section decreases. Particularly in the sewer pipeline, the microorganisms contained in the sewage may chemically erode the concrete on the inner peripheral surface of the pipeline, causing a reduction in the pipeline cross section and corrosion of the reinforcing bars.

As a method for repairing the deteriorated pipeline as described above, the pipeline rehabilitation method is adopted. The pipeline rehabilitation method is a thermosetting resin impregnated into the lining material by drawing the thermosetting fiber composite resin lining material into the pipeline and then heating the lining material from the inside. This is a method of accelerating the curing reaction and curing.
Here, as a method of heating the lining material from the inside, a method of using high temperature air (see Patent Document 1), a method of using high temperature steam (see Patent Documents 2 and 3), and the like have been proposed. .

JP-A-2000-282561 JP, 2008-1057, A JP, 2003-314748, A

When the lining material is heated using high temperature air or steam, there is a problem that energy consumption is large and it takes time to heat the lining material.

The present invention has been made to solve such problems of the conventional art, and provides a pipeline repair system and a repair method capable of quickly heating a lining material while suppressing energy consumption. To aim.

A repair system for a pipeline according to claim 1 is a repair system for repairing a concrete tubular pipeline (for example, pipeline 10 described below) using a lining material (for example, lining material 2 described below). For example, in a pipeline repair system 1) described below, a proximal socket connected to the proximal side of the pipeline (for example, a proximal socket 20 described below) and a socket connected to the proximal socket to be added. An overheated steam delivery device (for example, an overheated steam delivery device 21 described later) that delivers the pressurized overheated water vapor, and a tubular tip socket (for example, an inner diameter that is connected to the tip end side of the pipeline and becomes smaller toward the tip end) (for example, And a tubular lining material made of a fiber-composite resin having thermosetting property, which is disposed in an unheated position on the inner peripheral surface of the pipe line, in a state of being unheated. By sending pressurized superheated steam from the delivery device into the pipeline, the lining material is heated while being pressed from the inside to the inner peripheral surface of the pipeline by the superheated steam, and the inner peripheral surface of the pipeline is heated. It is characterized in that it cures in a close contact state.

According to the present invention, the lining material is arranged at the repair location on the inner peripheral surface of the pipeline, and in this state, the pressurized superheated steam is delivered from the superheated steam delivery device to the lining by the superheated steam. The material is heated while being pressed against the inner peripheral surface of the pipe line from the inside, and the lining material is cured while being in close contact with the inner peripheral surface of the pipe line. Therefore, the repaired part of the pipeline will be covered with the lining material, and the inner peripheral surface of the pipeline will be scraped off further due to the polishing action, and the concrete on the inner peripheral surface of the pipeline will be chemically eroded. It is possible to prevent the reduction of the cross section of the pipeline and the corrosion of the reinforcing bar.

Here, in the present invention, the lining material is heated by the pressurized superheated steam. Superheated steam is dry steam that is obtained by further heating superheated saturated steam that has been vaporized at 100° C. or higher to a gas state at 170° C. or higher. Therefore, compared with heated air, the heat capacity is large, the specific heat is about twice, the enthalpy is large, and the combined heat transfer of condensation, convection, and heat transfer has good heat efficiency. Things can be heated rapidly. Therefore, the energy consumption can be suppressed and the lining material can be efficiently and promptly heated.
In addition, since a circulation system for superheated steam is not required, the repair system can be downsized, which facilitates transportation and installation and enables efficient construction even in a narrow space.
In addition, when the lining material is heated with hot water (hot water heating) as in the past, wastewater treatment may be necessary. When the lining material is heated with hot steam (steam) Heating) and drain treatment may be required. However, in the present invention, since the lining material is heated by the superheated steam, wastewater treatment by hot water heating and drain treatment by steam heating are unnecessary.

The pipeline repair system according to claim 2 is characterized in that the tip socket is provided with a sluice valve (for example, a sluice valve 25 described later) for adjusting a flow rate of the tip socket.

According to the present invention, by adjusting the flow rate of the superheated steam flowing through the tip socket with the sluice valve, the internal pressure and the internal temperature on the tip side of the pipeline can be adjusted, so that the pipeline can be reliably repaired.

The pipeline repair system according to claim 3 further comprises a tubular elastic member (for example, an elastic member 24 described later) connected to the tip of the tip socket and having a predetermined length.

According to the present invention, since the cylindrical elastic member having a predetermined length is connected to the tip of the tip socket, the elastic member absorbs the noise due to the overheated steam discharged from the tip of the tip socket and leaks to the outside. Can be reduced.

The pipe repair system according to claim 4, further comprising a compressor (for example, a compressor 22 described later) that is connected to the superheated steam delivery device and sends out pressurized air having a temperature lower than that of the superheated steam. To do.

If the temperature of the superheated steam exceeds 150° C., the lining material made of fiber composite resin and the inner coating film of this lining material may be dissolved.
Therefore, according to the present invention, by supplying pressurized air having a temperature lower than that of the compressor into the superheated steam delivery device, it is possible to suppress an increase in the temperature of the superheated steam inside the pipeline on the proximal end side of the pipeline. However, it is possible to prevent dissolution of the lining material and the inner surface film of the lining material. Further, since the internal pressure and the internal temperature of the base end side of the pipeline can be adjusted, the pipeline can be reliably repaired.

The pipe repair method according to claim 5 is a method for repairing a tubular pipe made of concrete, which is made of a thermosetting fiber composite resin at a predetermined position on the inner peripheral surface of the pipe. The step of arranging the unheated cylindrical lining material (for example, step S1 described later) and sending the superheated steam pressurized from the superheated steam delivery device into the pipe, so that the lining is formed by the superheated steam. A step of heating the material while pressing it from the inner side to the inner peripheral surface of the pipeline, and curing the material in a state of being in close contact with the inner peripheral surface of the pipeline (for example, step S2 described later). ..

According to this invention, there is the same effect as that of the above-mentioned claim 1.

Advantageous Effects of Invention According to the present invention, it is possible to provide a pipeline repair system and a pipeline repair method that can suppress energy consumption and quickly heat a lining material. Further, by using the heating system using superheated steam, the wastewater treatment by hot water heating and the drain treatment by steam heating become unnecessary.

It is a side view of the pipeline repaired by the pipeline repair system concerning one embodiment of the present invention. It is a figure which shows the structure of the repair system of the said pipeline. It is a flow chart of the procedure of repairing a pipeline using the above-mentioned pipeline repair system. It is a figure explaining the procedure which repairs the said pipeline.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a side view of a pipeline 10 repaired by a pipeline repair system 1 according to an embodiment of the present invention. FIG. 2 is a diagram showing a configuration of the pipeline repair system 1.
As shown in FIG. 1, a pipeline repair system 1 repairs a damaged pipeline 10 by covering the inner circumferential surface of a concrete tubular pipeline 10 with a lining material 2 over the entire length. Is. As shown in FIG. 2, this pipeline repair system 1 includes a tubular proximal socket 20 connected to the proximal side (one end side) of the pipeline 10, and an overheat connected to the proximal socket 20. The steam delivery device 21, the compressor 22 connected to the superheated steam delivery device 21 and the base end socket 20, the tubular tip socket 23 connected to the tip side (the other end side) of the conduit 10, and the tip socket 23. And a cylindrical elastic member 24 having a predetermined length, which is connected to the tip of the.

The lining material 2 is made of a thermosetting fiber composite resin.
The superheated steam delivery device 21 sends out the pressurized superheated steam into the pipe 10 through the base end socket 20.
The compressor 22 and the superheated steam delivery device 21 are connected by a pipe 26. The compressor 22 and the base end socket 20 are connected by a pipe 27. The compressor 22 sends the pressurized air having a temperature lower than that of the superheated steam to the superheated steam delivery device 21 through the pipe 26 or the proximal end socket 20 through the pipe 27.
The tip socket 23 has a tubular shape whose inner diameter decreases from the tip side of the conduit 10 toward the tip. A sluice valve 25 for adjusting the flow rate of the superheated steam passing through the inside of the tip socket 23 is provided on the tip side of the tip socket 23.

A procedure for repairing a damaged pipeline 10 using the above pipeline repair system 1 will be described with reference to the flowchart of FIG.
In step S1, the lining material 2 is placed inside the conduit 10 in an unheated state.
In step S2, the pressurized superheated steam is delivered from the superheated steam delivery device 21 into the pipeline 10 through the proximal end socket 20. As a result, as shown in FIG. It is heated while being pressed against the inner peripheral surface of the tube 10, and is cured while being in close contact with the inner peripheral surface of the conduit 10. At this time, the compressor 22 is appropriately driven to adjust the internal pressure and the internal temperature of the base end side of the conduit 10. Further, the opening degree of the sluice valve 25 is appropriately adjusted, the flow rate of the superheated steam passing through the tip socket 23 is adjusted, and the internal pressure and the internal temperature on the tip side of the pipeline 10 are adjusted.
The superheated steam that has passed through the pipe line 10 is discharged through the tip socket 23 and the elastic member 24. At this time, the elastic member 24 absorbs noise due to the superheated steam discharged from the tip of the tip socket 23, and silences it.

According to this embodiment, there are the following effects.
(1) By curing the lining material 2 in close contact with the pipeline 10, the repaired portion of the pipeline 10 is covered with the lining material 2, and the inner peripheral surface of the pipeline 10 is further polished by the polishing action. It is possible to prevent scraping off and chemical erosion of concrete on the inner peripheral surface of the pipeline 10, thereby suppressing reduction in cross section of the pipeline 10 and corrosion of reinforcing bars.
Moreover, since the lining material is heated by the pressurized superheated steam, the energy consumption can be suppressed and the lining material can be efficiently and quickly heated.
Further, since the circulation system for the superheated steam is not required, the repair system 1 can be downsized, which facilitates transportation and installation and enables efficient construction even in a narrow place.

(2) By adjusting the flow rate of the superheated steam in the tip socket 23 with the sluice valve 25, the internal pressure and the internal temperature on the tip side of the pipeline 10 can be adjusted, so that the tip side of the pipeline 10 can be reliably repaired.

(3) Since the cylindrical elastic member 24 having a predetermined length is connected to the tip of the tip socket 23, the elastic member 24 absorbs noise due to overheated steam discharged from the tip of the tip socket 23 and leaks to the outside. Noise can be reduced.

(4) By sending low-temperature pressurized air from the compressor 22 directly to the base end side (having a double structure) of the pipeline 10 through the pipe 27, the base end socket 20 is locally cooled. Therefore, it is possible to prevent the lining material 2 attached to the base end socket 20 and the inner coating film of the lining material 2 from being melted. Moreover, since the internal temperature of the base end side of the conduit 10 can be adjusted, the base end of the conduit 10 can be reliably repaired.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within the scope of achieving the object of the present invention are included in the present invention.

1... Pipe repair system 2... Lining material 10... Pipe line 20... Proximal socket 21... Superheated steam delivery device 22... Compressor 23... Tip socket 24... Elastic member 25... Gate valves 26, 27... Piping

Claims (5)

A repair system for repairing a concrete tubular pipe using a lining material,
A proximal socket connected to the proximal side of the conduit,
An overheated steam delivery device connected to the base socket for delivering pressurized superheated steam;
A tubular tip socket connected to the tip side of the conduit and having an inner diameter that decreases toward the tip.
Sending pressurized superheated steam from the superheated steam delivery device in a state in which a tubular lining material made of a fiber composite resin having thermosetting property is placed in an unheated state at a repaired portion of the inner peripheral surface of the pipeline. The lining material is heated while being pressed against the inner peripheral surface of the pipeline from the inside by the superheated steam, and is cured in a state of being in close contact with the inner peripheral surface of the pipeline. . The pipe repair system according to claim 1, wherein the tip socket is provided with a sluice valve for controlling a flow rate of the tip socket. The pipe repair system according to claim 1 or 2, further comprising a tubular elastic member connected to a tip of the tip socket and having a predetermined length. The pipeline repair system according to any one of claims 1 to 3, further comprising a compressor connected to the superheated steam delivery device and delivering compressed air having a temperature lower than that of the superheated steam. A method of repairing a tubular pipe made of concrete,
At a predetermined position on the inner peripheral surface of the pipe, a step of disposing an unheated tubular lining material made of a fiber composite resin having thermosetting property,
By sending the superheated steam pressurized from the superheated steam delivery device into the pipeline, the lining material is heated while being pressed from the inside to the inner peripheral surface of the pipeline by the superheated steam, and the inner peripheral surface of the pipeline. And a step of curing it in a state of being in close contact with the pipe.

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