Low-temperature-resistant anti-cracking sprayed and wound thermal insulation pipe and manufacturing method thereof

A production method and anti-cracking technology, applied in the direction of heat preservation, pipe protection through heat insulation, pipe protection, etc., can solve problems such as surface cracking of heat preservation pipes, decline in heat preservation effect of heat preservation pipes, and easy detachment of heat preservation layers, so as to improve heat preservation effect, Effect of reducing cracking, strengthening elongation at break and tensile yield strength

Pending Publication Date: 2022-06-03
HEBEI HAOTIAN THERMOELECTRICITY EQUIP GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Insulation pipe is the abbreviation of heat insulation pipe. Due to the transportation of liquid, gas and other media, the heat insulation pipe is used in the heat insulation and heat preservation projects of petroleum, chemical industry, aerospace, military, central heating, central air conditioning, municipal and other pipelines; the heat preservation pipe on the market at present Most of them use a polyurethane foam insulation layer on the outer surface of the steel pipe; in the prior art, the insulation layer and the steel pipe are easily separated during the use of the insulation pipe, resulting in a decrease in the insulation effect of the insulation pipe, and cracks are prone to occur on the surface of the insulation pipe in a low temperature environment

Method used

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  • Low-temperature-resistant anti-cracking sprayed and wound thermal insulation pipe and manufacturing method thereof
  • Low-temperature-resistant anti-cracking sprayed and wound thermal insulation pipe and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

This example provides a method for making a low-temperature-resistant and anti-cracking spray-wound insulation pipe, comprising the following raw materials in parts by weight: 100 parts of combined polyether, 100 parts of surfactant, 50 parts of catalyst, 80 parts of water, 200 parts of water Polyethylene granules, 70 parts of curing agent, 50 parts of accelerator, 80 parts of toughening agent, 50 parts of plasticizer, 80 parts of thickener, 60 parts of diluent and 100 parts of preservative, weigh the combined polyether, The surfactant and the catalyst are mixed, and the semi-prepolymer is obtained after mixing, the polyethylene particles are put into the grinder, the grinder is started, and the polyethylene particles are ground into a particle diameter of 400 mesh, polyethylene powder, curing agent, accelerator Put the agent, toughening agent, plasticizer, thickener, diluent and preservative into the mixer, start the mixer, fully stir the mixture in the mixer to obtain a polyet...

Embodiment 2

This example provides a method for making a low-temperature-resistant and anti-cracking spray-wound insulation pipe, comprising the following raw materials in parts by weight: 150 parts of combined polyether, 120 parts of surfactant, 80 parts of catalyst, 70 parts of clean water, 150 parts of water Polyethylene granules, 60 parts of curing agent, 90 parts of accelerator, 140 parts of toughening agent, 60 parts of plasticizer, 70 parts of thickener, 60 parts of diluent and 80 parts of preservative, weigh the combined polyether, The surfactant and the catalyst are mixed, and the semi-prepolymer is obtained after mixing, the polyethylene particles are put into the grinder, the grinder is started, and the polyethylene particles are ground into a particle diameter of 400 mesh, polyethylene powder, curing agent, accelerator Put the agent, toughening agent, plasticizer, thickener, diluent and preservative into the mixer, start the mixer, fully stir the mixture in the mixer to obtain a ...

Embodiment 3

This example provides a method for making a low-temperature-resistant and anti-cracking spray-wound insulation pipe, comprising the following raw materials in parts by weight: 130 parts of combined polyether, 150 parts of surfactant, 50 parts of catalyst, 60 parts of water, 170 parts of water Polyethylene granules, 70 parts of curing agent, 90 parts of accelerator, 110 parts of toughening agent, 90 parts of plasticizer, 60 parts of thickener, 55 parts of diluent and 30 parts of preservative, weigh the combined polyether, The surfactant and the catalyst are mixed, and the semi-prepolymer is obtained after mixing, the polyethylene particles are put into the grinder, the grinder is started, and the polyethylene particles are ground into a particle diameter of 400 mesh, polyethylene powder, curing agent, accelerator Put the agent, toughening agent, plasticizer, thickener, diluent and preservative into the mixer, start the mixer, fully stir the mixture in the mixer to obtain a polyet...

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Abstract

The invention relates to the technical field of thermal insulation pipes, and discloses a low-temperature-resistant anti-cracking sprayed and wound thermal insulation pipe which comprises a thermal insulation layer arranged on the outer surface of a pipe body, an alarm line is arranged in the thermal insulation layer, an adhesive is arranged on the outer surface of the thermal insulation layer, an outer protective layer is arranged on the outer surface of the adhesive, and an auxiliary ring is installed in the pipe body. According to the low-temperature-resistant anti-cracking sprayed and wound thermal insulation pipe and the manufacturing method thereof, the flexibilizer and the plasticizer are added into the polyethylene particles, so that the outer protective layer made of polyethylene can be prevented from cracking and falling off in an ultralow-temperature environment, and the elongation at break and the tensile yield strength of the outer protective layer are enhanced; the tight connection among the heat preservation layer, the pipe body and the outer protection layer is further enhanced, the heat preservation effect of the pipe body in the using process is improved, the service life of the heat preservation layer, the pipe body and the outer protection layer is prolonged, and the probability that the pipe body cracks is reduced.

Description

technical field [0001] The invention relates to the technical field of thermal insulation pipes, in particular to a thermal insulation pipe with low temperature resistance and anti-cracking spraying and winding and a manufacturing method thereof. Background technique [0002] Thermal insulation pipe is the abbreviation of thermal insulation pipeline. Due to the transportation of liquid, gas and other media, thermal insulation pipe is used in thermal insulation projects of petroleum, chemical, aerospace, military, central heating, central air conditioning, municipal and other pipelines; thermal insulation pipes currently on the market. Polyurethane foam insulation layer is mostly used on the outer surface of the steel pipe; in the prior art, the insulation layer is easily separated from the steel pipe during the use of the insulation pipe, resulting in a decrease in the insulation effect of the insulation pipe, and the surface of the insulation pipe is prone to cracking in a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/02C08L75/08C08L23/06
CPCF16L59/02F16L59/028C08L75/08C08L2203/18C08L23/06Y02A20/20
Inventor 郑中胜郎魁元张国玉于海新高义杨
Owner HEBEI HAOTIAN THERMOELECTRICITY EQUIP GRP CO LTD
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