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Novel construction method for heat insulation of heat-insulating pipeline joints

A technology for pipe joints and construction methods, which is applied in the direction of protecting pipes, pipes/pipe joints/fittings, and pipe protection through heat insulation, and can solve problems such as poor sealing performance of heat-insulated pipe joints, hidden dangers of sealing performance, and decline in heat-insulation performance of heat-insulated pipes. Achieving excellent mechanical and sealing properties

Inactive Publication Date: 2014-02-26
BEIJING HTN PIPELINE EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the thermal insulation construction method of the thermal insulation pipeline joint in the prior art makes the sealing performance of the thermal insulation pipeline joint poor during construction, which leads to the decrease of the thermal insulation performance of the thermal insulation pipeline, and at the same time overcomes the need in the prior art. Holes are opened on the sleeve or sleeve, and there is a problem of hidden sealing performance at the opening, so as to provide a construction method for heat-insulating pipe joints with good sealing performance, no need to open holes on the sleeve in advance, and excellent thermal insulation performance

Method used

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  • Novel construction method for heat insulation of heat-insulating pipeline joints
  • Novel construction method for heat insulation of heat-insulating pipeline joints
  • Novel construction method for heat insulation of heat-insulating pipeline joints

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Effect test

Embodiment 1

[0046] This embodiment provides a new construction method for insulation of heat-insulated pipe joints, including

[0047] A. The step of joining the exposed ports of the working pipes 3, 4 of the adjacent two sections of heat-insulated pipelines 1, 2 to form an interface area;

[0048] B. The step of using prefabricated polyurethane foam tiles to form the heat insulating layer 5 in the installation area;

[0049] C. The step of forming an outer sheath on the outer wall of the heat insulation layer 5 and part of the outer walls of the outer sheath pipes 7, 8 of the adjacent two sections of heat insulation pipelines 1, 2, in the step of forming the outer sheath, first Install sealing strips 9, 10 in the installation area adjacent to the outer walls of the outer protective tubes 7, 8, and then set a heat-shrinkable sleeve 6 on the outer wall of the heat-insulating layer 5 as an outer sheath, and the heat-shrinkable The two ends of the sleeve 6 are respectively overlapped on the...

Embodiment 2

[0062] This embodiment provides a new construction method for thermal insulation of heat-insulated pipe joints, which is a deformation on the basis of Embodiment 1. In this embodiment, after the formation of the thermal insulation layer 5 during construction, the thermal insulation The outer wall of the layer 5 is fitted with a plastic film as a barrier layer, and the barrier layer is located between the outer wall of the heat-insulating layer 5 and the inner wall of the heat-shrinkable sleeve 6 to prevent the heat-shrinkable sleeve from The gas in the thermal insulation layer 5 inside 6 and / or the gas and moisture in the external environment pass through the barrier layer that circulates through the heat-shrinkable sleeve 6 .

[0063] During the use of the heat-insulating pipe joint, when the gas or moisture in the external environment penetrates into the barrier layer through the tube wall of the heat-shrinkable sleeve 6, it is blocked by the barrier layer, so that the gas or...

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Abstract

The invention provides a novel construction method for heat insulation of heat-insulating pipeline joints. The novel construction method includes mounting sealant tapes in mounting areas on the outer walls of adjacent outer protecting tubes, sleeving thermal-contracting sleeves on upper sleeves of the outer walls of heat-insulating layers to serve as protecting layers, enabling two ends of the thermal-contracting sleeves to be overlapped to the mounting areas of the adjacent outer protecting tubes and to just cover the mounting areas, ensuring the ends of the thermal-contracting sleeves to be spaced with the sealant tapes by a certain distance after being overlapped, and finally heating the thermal-contracting sleeves so as to enable the thermal-contracting sleeves to be melted and bonded with the sealant tapes to seal the thermal-contracting sleeves and the ends of the outer protecting tubes. The joints formed by the construction method have good sealability, and accordingly, heat insulation effects of the heat-insulating layers are guaranteed.

Description

technical field [0001] The invention relates to a novel heat-insulating construction method for heat-insulating pipe joints, and belongs to the technical field of heat-insulating heat-insulating pipe joints for medium transport. Background technique [0002] In the fields of central heating, cooling, oil and gas, etc., the pipelines used for medium transportation need to be insulated to ensure the insulation performance of the pipelines during the medium transportation process. Insulated pipes are generally prefabricated in the factory according to the length, and then installed on site to form joints at the joints of two insulated pipes. In the entire insulated pipe network, the quality of the joint installation will have a greater impact on the service life of the entire pipe network. Impact. [0003] In the prior art, the construction methods for thermal insulation treatment of thermal insulation pipeline joints mainly include the following two types: [0004] 1. Use he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L59/20F16L21/02
CPCF16L59/024F16L59/12F16L59/20
Inventor 叶勇周抗冰张红莲周莹莹
Owner BEIJING HTN PIPELINE EQUIP
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