JPH02120591A - Multifunctioning method for existing pipeline - Google Patents

Abstract

PURPOSE:To perform the regeneration and the multifunctioning of an existing pipeline simultaneously and prevent a communication cable from the lapse and the rupture of its function by disposing a resin foaming block in the space between the existing pipeline and an inner pipe and placing the communication cable in the block so as to form the existing pipeline into a multifunctional pipeline. CONSTITUTION:The water is shut off in the section to be operated in an existing pipeline 1, the inner surface of the pipeline is cleaned, and an inner pipe of a small diameter is inserted into the pipeline 1. A steel pipe, a polyethylene pipe, or a vinyl chrolide pipe, for instance, is used as the inner pipe 2. A block 3, a resin forming body, is disposed in the space between two pipelines 1, 2, and a communication cable 4 is disposed in the block 3 at the same time. The regeneration and the multifunctioning of the existing pipeline are thus performed simultaneously. The communication cable is disposed in the space between the existing pipeline and the inserted inner pipe, and no problem is generated in case the communication cable 4 is provided either inside or outside the pipeline. Moreover, as the communication cable is disposed in the shock absorbing foaming body, the deformation of the existing pipeline and the inner pipe is transmitted to the communication cable, so that the communication cable is prevented from the lapse or the rupture of its function.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for rehabilitating existing piping and making it a multifunctional piping having communication and power transmission functions.

[Prior Art] Recently, attempts have been made to transmit various information between a sewage treatment plant and a pumping station using, for example, a sewage pipe.

In this case, a method is to lay a dedicated protective tube for communication cables, power transmission cables, etc. (hereinafter simply referred to as communication cables) outside the fluid transport piping, and run the communication cables through it.

Alternatively, there is a method of passing the communication cable through the pipe without fixing it, or fixing the communication cable with an anchor at the top of the sewage pipe.In this case, a robot is used to fix the communication cable with the anchor. ing.

[Problems to be solved] However, in the case of laying communication cables outside the piping as described above, 1. A place outside the pipes will be exclusively used for laying the communication cables.

2. Even if a protective tube is used exclusively for communication cables, there are problems such as the need to have strength against external forces and corrosion resistance.

Furthermore, the method of passing communication cables through piping has the following problems.

1. The communication cable may dance or vibrate due to the internal fluid, causing fatigue failure and breakage.

2. The internal fluid may damage the covering of the communication cable, causing it to lose its function as a communication nozzle.

3. The coating material of the communication cable may dissolve into the internal fluid, reducing the quality of the internal fluid.

4. If the internal fluid is tap water, it may be unsuitable for drinking water.

5. May require expensive robots.

An object of the present invention is to provide a method for making existing piping multi-functional, which can solve the above-mentioned problems.

[Means for Solving the Problems] The method of making existing piping multi-functional according to the present invention is such that, when inserting an inner pipe having an outer diameter smaller than the inner diameter of the existing pipe into the existing pipe, A resin foam block is disposed in the gap between the outer surface of the inner insertion tube and a communication cable is disposed within this block, thereby providing multifunctional piping for existing piping.

[Operation: By placing a resin foam block with a communication cable installed in the gap between the inner pipe and the inner pipe inserted into the existing pipe,
The existing piping will be rehabilitated and multi-functionalized at the same time. and,
Since the communication cable is arranged in the gap between the existing pipe and the inserted inner pipe, the above-mentioned problem when the communication cable is provided inside and outside the pipe does not occur. In addition, since the communication cable is inserted into the gap between the existing piping and the inserted inner tube and is placed in a foam that has cushioning properties, deformation of the existing piping and inner tube is transmitted to the communication cable, causing the communication cable to will not lose its functionality or break. Furthermore, since resin foam has high heat insulation properties, it can be suitably used for fluids that require heat retention.

[Example] An example of the method of the present invention will be described below with reference to FIG.

Water is cut off in the construction section of the existing pipe 1, and the inner surface of the pipe is cleaned. Then, a small-diameter inner pipe 2 is inserted into the pipe 1. This inner pipe 2 is, for example, an iron pipe, a polyethylene pipe, or a vinyl chloride pipe. Resin foam block 3 in the gap between two pipes
to be placed. At this time, a communication cable 4 is arranged in this block 3.

In this way, existing piping can be rehabilitated and multi-functionalized at the same time.

In addition, as the communication cable 4, an optical fiber telephone line,
There are coaxial cables, power transmission cables, etc.

[Effects of the Invention] The method for making existing pipes multi-functional according to the present invention is as described above, in which a resin foam block with communication cables arranged is placed in the gap between the inner pipe and the inner pipe inserted into the existing pipe. By installing this system, existing piping can be rehabilitated and multi-functionalized at the same time. Since the communication cable is installed in the gap between the existing piping and the inserted inner tube, the above-mentioned problem when the communication cable is provided inside and outside the piping does not occur. In addition, since the communication cable is inserted into the gap between the existing piping and the inserted inner tube and is placed in a foam that has cushioning properties, deformation of the existing piping and inner tube is transmitted to the communication cable, causing the communication cable to will not lose its functionality or break. Further, since resin foam has high heat insulation properties, it can be suitably used for fluids that require heat retention.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing one embodiment of the method of the present invention. 1... Existing piping 2... Inner pipe 3... Resin foam block 4... Communication cable. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] When inserting an inner pipe having an outer diameter smaller than the inner diameter of the existing pipe into the existing pipe, a resin foam block is placed in the gap between the inner surface of the existing pipe and the outer surface of the inserted inner pipe, and a resin foam block is placed inside the block. A multifunctional piping method for existing piping, which is characterized in that communication cables are installed in the existing piping to provide multifunctional piping.