Prefabricated PIR copious cooling heat preservation pipe
A prefabricated insulation pipe and cryogenic technology, applied in the direction of heat preservation, pipe protection through heat insulation, pipe protection, etc., can solve the problems of affecting the heat preservation effect, requiring a certain amount of time for installation, and affecting production plans, etc.
Inactive Publication Date: 2016-02-10
TIANJIN XIN YUTONG CORROSION INSULATION ENG
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Problems solved by technology
[0002] When transporting liquid nitrogen and other special liquids in pipelines, it is necessary to take insulation measures for the pipelines. At present, it is generally done manually to splice the prefabricated shells on the welded pipelines for heat preservation, and then do the work on the outer protection tubes of the moisture-proof layer. However, This requires the expenditure of labor costs, and it will take a certain amount of time to install at the same time, which will affect the production plan; because the installation is to install the tube shells and outer protective tubes in sections, so between two prefabricated insulation tube shells and two sections The places where the outer protective pipes meet will affect the overall insulation effect
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[0016] like figure 1 As shown, the present invention provides a PIR cryogenic prefabricated insulation pipe, which is characterized in that it includes: an inner pipe 3; an outer protective pipe 1, which is sleeved on the outside of the inner pipe 3; a polyisocyanurate (PolyisocyanurateFoam, PIR) layer 4 , located between the inner tube 3 and the outer protective tube 4, the polyisocyanurate layer 4 is formed by casting; an isolation layer 6, located between the inner tube and the polyisocyanurate layer, for Prevent deformation of the polyisocyanurate layer. Because the insulation pipe is generally used to transport hotter substances such as steam, or liquid nitrogen with a lower temperature, etc., and the polyisocyanurate layer 4 is affected by cold and heat, thermal expansion and contraction occur to cause deformation, the present invention In order to prevent this phenomenon from happening, an isolation layer 6 is introduced, which may be polyethylene or a release agent co...
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The invention provides a prefabricated PIR copious cooling heat preservation pipe. The prefabricated PIR copious cooling heat preservation pipe is characterized by comprising an inner pipe, an outer protection pipe, a PIR layer and an isolation layer, wherein the inner pipe is sleeved with the outer protection pipe, the PIR layer is located between the inner pipe and the outer protection pipe and formed in a pouring mode, and the isolation layer is located between the inner pipe and the PIR layer and used for preventing the PIR layer from deforming. The prefabricated PIR copious cooling heat preservation pipe is provided with the outer protection pipe, the inner pipe and the PIR layer located between the outer protection pipe and the inner pipe, and therefore a better heat preservation effect is achieved; a dampproof coating layer is arranged for preventing damp; furthermore, the isolation layer is arranged, and therefore the PIR layer is effectively prevented from deforming. According to the prefabricated PIR copious cooling heat preservation pipe, it is not needed to manually install the outer protection pipe on site, and therefore trouble and labor are better saved.
Description
technical field [0001] The invention relates to the technical field of heat preservation pipes, in particular to a PIR cryogenic prefabricated heat preservation pipe and a manufacturing method thereof. Background technique [0002] When transporting liquid nitrogen and other special liquids in pipelines, it is necessary to take insulation measures for the pipelines. At present, it is generally done manually to splice the prefabricated shells on the welded pipelines for heat preservation, and then do the work on the outer protection tubes of the moisture-proof layer. However, This requires the expenditure of labor costs, and it will take a certain amount of time to install at the same time, which will affect the production plan; because the installation is to install the tube shells and outer protective tubes in sections, so between two prefabricated insulation tube shells and two sections Where the outer protective tubes meet will affect the overall thermal insulation effect...
Claims
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IPC IPC(8): F16L59/05F16L57/00
Inventor 王增光
Owner TIANJIN XIN YUTONG CORROSION INSULATION ENG