Thermal insulating pipe shell for liquefied natural gas pipeline

Abstract

The invention discloses a thermal insulating pipe shell for a liquefied natural gas pipeline. The thermal insulating pipe shell comprises a pipe shell body with a hollow cylinder structure; the pipe shell body comprises two semi shells with consistent structures; insertion slots are arranged on the outer surfaces of the semi shells; the thermal insulating pipe shell also comprises filling strips; the filling strips are of U-shaped structures capable of being inserted into the insertion slots at the same sides of the semi shells; locking rings are arranged at the outer surfaces of the filling strips; the locking rings are provided with rope parts for fixedly connecting the two semi shells; the arc top ends of the cylindrical surfaces of the semi shells are provided with fixing columns for fixing the rope parts. The thermal insulating pipe shell has the advantages of simple structure, convenience in operation and high practicability and can overcome the defect that the heat is radiated to outside by seams between the pipe shells by heat radiation, more heat is locked without dissipation, and the thermal insulating effect is improved; the mounting construction is fast, the manufacturing cost of the pipe shell is low and the firmness and reliability are good.

Description

technical field [0001] The invention relates to an auxiliary part for external use of a conveying pipeline, in particular to a liquefied natural gas pipeline insulation shell, which belongs to the technical field of pipeline insulation. Background technique [0002] Insulation pipelines are widely used in liquid and gas transportation pipe networks. In insulation transportation pipelines, pipeline insulation is a very important link. The success of this link is directly related to whether the pipeline can be officially put into use. [0003] At present, the insulation pipes generally used for liquefied natural gas pipelines are pipe shell insulation. There are mainly two types of existing heat insulation pipe shells. Open and wrap the tube for installation; the second is to synthesize a round tube from two half-tube shells. Each joint surface of these structures is a plane, and it is extremely easy to cause gaps at the joint surfaces during installation, which directly affe...

AI Technical Summary

Problems solved by technology

The joint surfaces of these structures are all flat, and it is extremely easy to cause gaps at the joint surfaces during installation, which directly affects the thermal insulation effect

The structure of these shells inevitably encounters the problem of "thermal bridge", that is to say, the heat radiation radiates outward through the gap between the shells and the shells, resulting in heat loss, thus affecting the insulation effect

[0004] In addition, in the prior art, the insulation tube shell commonly used in the conveying pipeline is composed of two half-tube shells with a certain length. The outer surface of the shell is bound and fixed around the circumference, which not only brings inconvenience to the construction, but also is not conducive to the disassembly and reuse of the heat preservation shell

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