CN2040208U - Insulating polyurethane tube with outer plastic casing - Google Patents

Abstract

The utility model discloses an insulating polyurethane tube with an outer plastic casing tube. An inner tube of the insulating polyurethane tube with an outer plastic casing tube is a steel tube (or a stainless steel tube, a cast iron tube, and a plastic tube); an outer casing tube of the insulating polyurethane tube with an outer plastic casing tube is made of high-pressure polyethylene with low-density; a mesosphere is cast by rigid polyurethane foam and is foamed and fixed to shape, and then an insulating tube is made. Compared with the existing insulating tube which is spread with insulating material on a conduit and then is coated with thin iron sheets, the insulating tube has the advantages of light body, easy construction, water prevention, corrosion prevention, etc.; the process of construction is reduced, and the engineering cost is decreased. The making method of the utility model is that the steel tube and an outer casing tube are fixed on the support of a specific mould, the polyurethane foam is cast on a specific casting tower and is foamed and fixed to shape.

Description

Insulating polyurethane tube with outer plastic casing

Plastic wrapper tubular type polyurethane thermal pipe belongs to heating, refrigerant pipe, freezing prevention tubing, the field of thermal insulation of industry such as petrochemical industry.Antifreeze, the insulation of existing various water, vapour, liquid pipeline, many outsides at pipeline, apply with various antifreeze, thermal insulating materials, for example: asbestos, glass wool, mineral wool, foamed plastics etc., sheet iron or thin aluminum sheet on the clad again in the outside of thermal insulating material, or, be coated with pitch prill, paint etc. then with Polypropylence Sheet, glass fibre cloth looping, after the engineering site construction, imbed underground or built on stilts.

Plastic wrapper tubular type polyurethane thermal pipe of the present utility model, its structure characteristic is that with steel pipe (or Stainless Steel Tube, plastic tube, cast iron tube etc.) be interior pipe, with the low-density high-pressure polyethylene plastic tube is outer tube, mesosphere cast hard polyurethane foams, give at special factory and to make material, being transported to needs with on-the-spot, and assembling gets final product.

Plastic wrapper tubular type polyurethane thermal pipe of the present utility model, than the thermal insulation pipe of it existing clad sheet iron and looping Polypropylence Sheet have easy construction, be suitable for long-distance transport, reduce engineering hand preface, volume is light, reduce advantage such as engineering cost and the construction back sturdy and durable, water repelling property and corrosion resistance are good.

The manufacture method of overcoat tubular type polyurethane thermal pipe of the present utility model: pipe steel pipe and overcoat plastic tube in specific mould upper support is good, on special cast tower, the cast polyurethane foamed plastics, through foaming, fixed-type.To welded pipe, bell-and-spigot pipe, the flange coil pipe of the connecting means of different pipelines, and the valve body of pipe arrangement annex, threeway, various angle elbow, expanders etc. all can be made thermal insulation pipe and insulation accessory by this law.

Embodiment 1

The steel pipe in 2 inches footpaths, outer sleeve are the thick low-density high-pressure polyethylene pipe of 3mm, and the thick urethane foam of 30mm is poured into a mould in the mesosphere, measure its thermal conductivity through thermodynamic test and are:

0.017～0.024 kilocalorie/Mi Shidu (℃)

Plastic wrapper tubular type polyurethane thermal pipe of the present utility model can made shades of colours such as red, blue, ash to the graphical symbol of vapour, water, liquid on the technology according to oil, chemical engineering industry on outer tube.

Below as follows with regard to description of drawings:

Among Fig. 11 is interior pipe, and 2 is the overcoat plastic tube, and 3 is the mesosphere polyurethane foam.

Claims (1)

1. A kind of plastic wrapper tubular type polyurethane thermal pipe is characterized in that with the low-density high-pressure polyethylene pipe be outer sleeve, is interior pipe with steel pipe, the thermal insulation pipe of mesosphere cast hard polyurethane foams.

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