Production method of foam insulation pipe and foam insulation pipe

Abstract

The invention provides a method for producing a foaming heat-preservation pipe. The method includes the steps that locating supporting beams are evenly fixed on the outer wall of an inner pipe body of the heat-preservation pipe in the radial direction; the inner pipe body with the locating supporting beams is sleeved with an outer pipe body with one closed end; the opening end of the outer pipe body is upwards and vertically fixed; liquid polyurethane is injected into a gap between the inner pipe body and the outer pipe body, the polyurethane foams and swells in the gap in a set time and at a set temperature, the gap between the inner pipe body and the outer pipe body is filled with the foamed polyurethane, and the foamed polyurethane is coagulated between the inner pipe body and the outer pipe body. The problem that an existing heat-preservation pipe is low in heat-preservation performance and high in maintaining cost is solved. In this way, accurate attachment between a polyurethane insulation coating and the inner pipe body and between the polyurethane insulation coating and the outer pipe body is guaranteed, moisture coagulation and internal corrosions are reduced, the service life of the heat-preservation pipe is accordingly prolonged, and the maintaining cost is accordingly reduced.

Description

technical field [0001] The invention relates to the technical field of thermal pipeline transmission and production, in particular to a production method of a foamed thermal insulation pipe and the foamed thermal insulation pipe. Background technique [0002] Heat pipes are widely used in thermal heating and transmission pipelines in chemical production. Existing heat transmission pipelines are realized by using different types of insulation pipes according to different heating requirements and transmission requirements. In order to ensure a better heat preservation effect in existing heat preservation pipes, the heat preservation pipe structure is usually adopted, and the polystyrene insulation layer is fixed on the outside of the inner pipe, and the mode of adding an outer pipe outside the polystyrene heat preservation layer is realized. Since the insulation pipe is mostly implemented in the way of underground pre-buried, when the insulation pipe is buried underground as a...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a foam insulation pipe, which solves the problems of low thermal insulation performance and high maintenance cost of existing insulation pipes

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