Pipe-in-pipe method and spraying method polyurethane thermal insulation pipe and testing method thereof

Abstract

The invention provides a pipe-in-pipe method and spraying method polyurethane thermal insulation pipe and a testing method thereof.The pipe comprises an outer layer pipe and a built-in pipe, the built-in pipe is located in the middle of the interior of the outer layer pipe, and a clamping mechanism is arranged between the outer layer pipe and the built-in pipe; an anti-corrosion layer is arranged on the annular outer surface of the outer-layer pipe, a reinforcing layer is arranged in the outer-layer pipe and located in the anti-corrosion layer, and a soft layer is arranged in the outer-layer pipe and located on the inner side of the reinforcing layer. According to the pipe-in-pipe method and spraying method polyurethane thermal insulation pipe and the testing method thereof, when the corresponding built-in pipe and the outer-layer pipe are connected, the clamping and fixing effect between the built-in pipe and the outer-layer pipe can be directly completed, external personnel can conveniently conduct adjustment and installation treatment, and the installation treatment effect is improved; meanwhile, a plurality of interlayers are arranged between the outer-layer pipe and the inner-layer pipe, so that the using performance of the whole pipe body can be effectively improved, the strength of the whole pipe body is enhanced, and external personnel can conveniently use the pipe body.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation pipes, in particular to a pipe-in-pipe method and a spraying method polyurethane thermal insulation pipe and a testing method thereof. Background technique [0002] Polyurethane thermal insulation pipe, full name: high-density polyethylene plastic outer protective polyurethane foam prefabricated direct buried thermal insulation pipe, which is formed by the working steel pipe for conveying the medium, the polyurethane thermal insulation layer, and the polyethylene plastic outer protective pipe, which are sequentially combined outward through the equipment. [0003] When the polyurethane insulation pipe is in use, there is no corresponding locking mechanism between the inner pipe and the outer pipe, and at the same time, there is no corresponding interlayer inside the entire pipe body, which leads to the poor use effect of the entire pipe body when it is tested and used. When...

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Problems solved by technology

[0005] The invention provides a polyurethane thermal insulation pipe with pipe-in-pipe method and spraying method and its testing method, which solves the problem that no corresponding locking mechanism is provided between the inner pipe and the outer pipe, and at the same time, no corresponding interlayer is provided inside the entire pipe body, resulting in When the whole pipe body is used for testing, the use effect is not good, and when the personnel handle it later, the operation and processing are too cumbersome.

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