Steam directly buried pipe

Abstract

The invention discloses a steam directly buried pipe. The steam directly buried pipe comprises a casing pipe, a core pipe, a heat-preserving structure, a fixed bracket and movable brackets, wherein the heat-preserving structure is wrapped on the core pipe; the fixed bracket and the movable brackets are arranged between the casing pipe and the core pipe; a corrugated pipe compensator is arranged at one end of the core pipe; the fixed bracket is arranged at the other end of the core pipe; the movable brackets are uniformly arranged between the corrugated pipe compensator and the fixed bracket; a clearance A is formed between one end of a protecting sleeve of the corrugated pipe compensator and the core pipe; a remedying device is concentrically sleeved on the protecting sleeve and the end of the core pipe where the clearance A is formed; the clearance A is communicated with the remedying device; the remedying device is provided with a steam exhausting device; the fixed bracket is trumpet-shaped; and on each movable bracket, a heat-isolating cushion is arranged between the core pipe and a hoop. The service life of equipment is prolonged, the heat energy loss is reduced, and the heat supply radius is increased.

Description

technical field [0001] The invention relates to the technical field of thermal equipment manufacturing, in particular to direct buried steam pipes. Background technique [0002] Directly buried steam pipe is a steam pipe buried underground for laying long-distance heating, including a core pipe, an outer pipe and an insulation layer between the two. The steam circulates in the core pipe, and the insulation layer is used to reduce The temperature drop during the steam transmission process, and the outer casing plays the role of isolating the soil, supporting and protecting the core pipe. [0003] In the prior art, in the process of manufacturing direct-buried steam pipes, polyurethane rigid foam and rock wool are generally used to insulate the pipes. Polyurethane rigid foam has poor heat resistance and flame retardancy, and is prone to deformation and failure. It is not suitable to be used alone as the insulation layer of high-temperature pipelines; and rock wool has poor hy...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a direct-buried steam pipe, which can solve the problem of short service life of the direct-buried steam pipe in the prior art, and at the same time, the large heat loss leads to a small heating radius

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