High-temperature heat insulation pipeline production technology

A production process and heat insulation technology, which is applied in the production process field of high-temperature heat-insulated pipes, can solve the problems of small heat loss, high-temperature resistance, water resistance, and small heat loss of heat-insulated pipes, and can not be satisfied at the same time, so as to improve temperature resistance, Guaranteed heat insulation performance, excellent heat insulation and heat resistance effect

Inactive Publication Date: 2014-04-30
BEIJING HTN PIPELINE EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the heat-insulated pipelines in the prior art cannot meet the technical requirements of high temperature resistance, water resistance and small heat loss at the same time, so as to provide a high temperature resistant and water resistant pipeline that can be applied to high temperature medium transportation. Production process of heat-insulated pipes wi

Method used

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  • High-temperature heat insulation pipeline production technology
  • High-temperature heat insulation pipeline production technology
  • High-temperature heat insulation pipeline production technology

Examples

Experimental program
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Effect test

Embodiment 1

[0072] This embodiment provides a production process for a high-temperature heat-insulated pipeline, which includes the following steps in sequence:

[0073] A. Install several airgel felts 4 along the axial direction on the outer wall of the working tube 1, such as Figure 9As shown, the two ends of the airgel blanket 4 are butted around the outer wall of the working tube 1, and a butt joint line is formed between the two ends, and the butt lines of several pieces of the airgel blanket 4 are along the The axial outer wall of the working tube 1 is arranged in a staggered manner, and the airgel blanket 4 is fixed on the working tube 1 by several fixing belts, and several fixing belts are arranged along the axis of the working tube 1. distribution, the distance between the fixing belt located at the axially outermost end of the working tube 1 and the airgel blanket 4 located at the axially outermost end of the working tube 1 on the same side is not greater than 50mm. In this emb...

Embodiment 2

[0094] This embodiment provides a production process for high-temperature heat-insulated pipelines, which is an improvement on the basis of Embodiment 1. In this embodiment, before installing the fixing tape, at least one layer of plastic film.

[0095] The plastic film increases the fluidity of the foam in the process of foaming to form the heat insulation layer, and it is easy to realize the homogenization of the foaming.

Embodiment 3

[0097] This embodiment provides a production process for high-temperature heat-insulated pipelines, which is an improvement on the basis of Embodiment 1 or 2. In this embodiment, after the airgel felt 4 is fixed, The surface of the gel blanket 4 is installed with several circles of plastic supports 5 along its axial direction.

[0098] The installation of plastic brackets can avoid the eccentricity of the middle position and both ends of the heat insulation pipe when the working pipe is long, and further ensure the coaxiality of the working pipe itself at different positions, thereby facilitating the uniformity of the thickness of the heat insulation layer; in addition, the installation The plastic bracket facilitates the installation of signal lines on the bracket.

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Abstract

The invention provides a high-temperature heat insulation pipeline production technology. The technology is characterized in that a plurality of aerogel felts are axially installed along the outer wall of a work tube before an outer protection tube is jointed to make the aerogel felts combined with a polyurethane thermal insulation layer formed through foaming in order to form a heat insulation system of a heat insulation pipeline, and the heat insulation system combines the respective excellent performances of the aerogel felts and the foamed polyurethane thermal insulation layer, can substitute traditional heat insulation materials having an unfavorable heat insulation effect, like cement perlite tiles and glass wool, has an improved temperature tolerance, and also has the characteristics of energy saving, environmental protection, safety, reliability and the like; and additionally two ends of the aerogel felts are abutted surrounding the outer wall of the work tube, abutment lines are formed between the two ends, and the abutment lines of the plurality of aerogel felts are assigned along the axial outer wall of the work tube in an interlace manner, so a defect of the heat insulation performance decrease caused by the rapid loss of heat along the abutment lines distributed along a straight line because one abutment line cracking of the aerogel felts when the abutment lines are positioned in a same straight line is avoided, thereby the pipeline heat insulation performance is guaranteed.

Description

technical field [0001] The invention relates to a production process of a high-temperature heat-insulating pipeline, and belongs to the technical field of medium-transporting heat-insulating pipelines. Background technique [0002] In the fields of central heating, central cooling, oil and gas transportation, etc., the pipelines used for medium transportation need to be insulated to ensure the insulation performance of the pipelines during medium transportation. In the prior art, the materials used as the thermal insulation layer of the thermal insulation pipeline generally include cement perlite, glass wool, polyurethane foam and the like. [0003] For example, the Chinese patent document CN201034218Y discloses a steel socket prestressed reinforced concrete heat insulating pipe, which is composed of a pipe core and a heat insulating layer, wherein the heat insulating layer is made of glass felt or cement perlite or asbestos cement or glass cloth. However, Due to the large ...

Claims

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Application Information

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IPC IPC(8): B29C69/02B29C53/58B29C44/34B29C44/48
Inventor 周抗冰叶勇张璋
Owner BEIJING HTN PIPELINE EQUIP
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