Regeneration pipeline

Abstract

Provided is a rehabilitated pipeline capable of cost reduction. 【Solution means】The rehabilitated pipeline 100 obtained by rehabilitating an existing pipeline includes an existing pipeline part 110 having a polished inner peripheral surface, a primer layer 120 formed on the inner peripheral surface, and a polyurea resin layer 130 formed on the primer layer. According to this rehabilitated pipeline, the function as a pipeline can be rehabilitated without the need for construction that pulls in long construction materials into the existing pipeline. As a result, cost reduction of the rehabilitated pipeline can be achieved.

Description

Technical Field

[0001] This specification discloses a technology related to rehabilitation pipelines.

Background Art

[0002] A rehabilitation pipeline is a pipeline obtained by rehabilitating existing pipelines buried underground, such as aging or damaged sewer and power pipelines, by a trenchless method. Patent Document 1 describes a rehabilitation pipeline in which the inside of a coil formed body laid inside an existing pipe and having adjacent wire materials adhered to each other is lined.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The rehabilitation pipeline of Patent Document 1 has a problem that since it is necessary to lay a coil formed body inside an existing pipeline, the material cost of the coil formed body increases, and time and labor are required for laying the coil formed body.

Means for Solving the Problems

[0005] One form disclosed in this specification is a rehabilitation pipeline obtained by rehabilitating an existing pipeline. This rehabilitation pipeline includes an existing pipeline portion having a polished inner peripheral surface, a primer layer formed on the inner peripheral surface, and a polyurea resin layer formed on the primer layer. According to the rehabilitation pipeline of this form, the function as a pipeline can be rehabilitated without the need for construction that requires pulling long construction materials into the existing pipeline. As a result, cost reduction of the rehabilitation pipeline can be achieved.

Brief Description of the Drawings

[0006]

Figure 1

Figure 2

Embodiment for Carrying Out the Invention

[0007] FIG. 1 is an explanatory view showing a rehabilitation pipeline 100. The rehabilitation pipeline 100 is a pipeline for rehabilitating an existing pipeline. The rehabilitation pipeline 100 is buried in the ground 800 between two manholes 700. The rehabilitation pipeline 100 is a sewer pipeline. The rehabilitation pipeline 100 may also be other pipelines buried underground, such as water supply pipelines, gas pipelines, power pipelines, communication cable pipelines, etc.

[0008] FIG. 2 is an enlarged cross-sectional view showing the rehabilitation pipeline 100. The rehabilitation pipeline 100 includes an existing pipeline section 110, a primer layer 120, and a polyurethane resin layer 130.

[0009] The existing pipeline section 110 of the rehabilitation pipeline 100 is a part of an existing pipeline that has aged or been damaged. The inner peripheral surface 115 of the existing pipeline section 110 is polished to improve the adhesion with the primer layer 120. The existing pipeline section 110 is a rigid polyvinyl chloride pipe. The existing pipeline section 110 may also be a pipe made of other materials, such as steel pipes, stainless steel pipes, polyvinyl chloride-lined steel pipes, copper pipes, lead pipes, cast iron pipes, concrete pipes, polyethylene pipes, polybutene pipes, and bridge-mounted polyethylene pipes.

[0010] The primer layer 120 of the rehabilitation pipeline 100 is a layer formed on the inner peripheral surface 115 of the existing pipeline section 110. The primer layer 120 is formed by applying a primer (undercoat paint) on the inner peripheral surface 115 of the existing pipeline section 110 and curing it. The primer layer 120 may be a layer formed by a polyurethane-based primer or a layer formed by an epoxy-based primer.

[0011] The polyurea resin layer 130 of the rehabilitation pipeline 100 is a layer formed on the primer layer 120. The polyurea resin layer 130 is formed by applying a paint mainly composed of polyurea resin on the primer layer 120 and curing it.

[0012] According to the rehabilitation pipeline 100 described above, the function as a pipeline can be rehabilitated without the need for construction that pulls long construction materials into the existing pipeline. As a result, cost reduction of the rehabilitation pipeline 100 can be achieved.

[0013] The technology disclosed in this specification is not limited to the above-described embodiments, examples, and modifications, and can be realized in various configurations without departing from the gist thereof. For example, among the technical features in the above-described embodiments, examples, and modifications, those corresponding to the technical features in each form described in the summary of the invention column can be appropriately replaced and combined in order to solve some or all of the above-described problems, or to achieve some or all of the above-described effects. In addition, technical features not described as essential in this specification can be appropriately deleted.

Explanation of Reference Numerals

[0014] 100…Rehabilitation pipeline 110…Existing pipeline section 115…Inner peripheral surface 120…Primer layer 130…Polyurea resin layer 700…Manhole 800…Underground

Claims

【Claim 1】 A rehabilitated pipeline obtained by rehabilitating an existing pipeline, comprising: an existing pipeline section having a polished inner peripheral surface; a primer layer formed on the inner peripheral surface; a polyurea resin layer formed on the primer layer and the rehabilitated pipeline provided with the same.

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