CN2392962Y

CN2392962Y - Soft-belt heat-insulation butt-welding type steel-plastic composite pipe

Info

Publication number: CN2392962Y
Application number: CN 99222313
Authority: CN
Inventors: 赵培成
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-13
Filing date: 1999-09-13
Publication date: 2000-08-23
Anticipated expiration: 2009-09-13

Abstract

The utility model relates to a soft-belt heat insulation butt-welding type steel-plastic composite pipe, which belongs to the basic non cutting processing of a metal pipe and a special product produced by a plastic. The soft-belt heat insulation butt-welding type steel-plastic composite pipe is used for cold and hot water supply pipelines of a building, a gas pipeline, an air conditioning pipeline, a cable wire penetrating pipe, a petrifaction fluid conveyor pipe, etc. The soft-belt heat insulation butt-welding type steel-plastic composite pipe is characterized in that the soft-belt heat insulation butt-welding type steel-plastic composite pipe is orderly composed of a plastic inner pipe, a macromolecule inner adhesive layer, a heat insulation soft belt, a steel belt butt joint steel circular pipe with a straight welding seam, a macromolecule outer adhesive layer, and a plastic outer pipe which are from interior to exterior. The utility model has the advantages of fast welding speed, convenient operation, easy compounding, high productive efficiency, low cost, sufficient rigidity and intensity, corrosion resistance, no rusting, etc.; the heat insulation soft belt and a steel pipe are close stuck.

Description

The soft-belt heat-insulation butt-welding type steel-plastic composite pipe

A kind of soft-belt heat-insulation butt-welding type steel-plastic composite pipe, belong to metal tube do not have cutting substantially and with plastics-production particular product technical field.Be mainly used in Building Cooling water water supply line, coal gas, air-conditioning duct, cable penetration pipe, petrochemical industry fluid delivery tube etc.

In the prior art, common steel-plastic composite pipe on the domestic and international market has only the Japanese a kind of product that produces at present.But it is to serve as a contrast a finished product plastic tube in fished pipe again, and heating is combined with each other the two then; Or in fished pipe, be coated with the skim plastics again.No matter any, its production process is all discontinuous, all is the secondary deep processing to fished pipe, thereby the cost height, and the difficult sealing of section still needs great deal of steel and still has the corrosion problem.The applicant not long ago designed success and had applied for utility model patent, application number is 99221195.6 " butt joint type steel-plastic composite pipe ", though can solve existing questions in the prior art, but because of small-bore pipe pad under weld seam in order to when welding heat insulation with the corresponding to arc steel band of tube wall shape processing technology complexity herein, it is in full accord to be difficult to assurance and tube wall shape, bore is more little, and difficulty is big more, thereby influences compound fastness.

The purpose of this utility model is to provide the solution of all can relying on one's own efforts of a kind of all manufacturing mechanisms, and can replace fished pipe to being welded into pipe with the continuous production in enormous quantities of production line once-through and with thin steel band, a large amount of steel of saving, thereby can reduce production costs significantly, have under the weld seam high-temperature resistant fiber braiding soft be with heat insulation, can not scorch plastic inner pipe, welding speed is fast, can weld wall thickness 0.5～2mm pipe diameter 32～160mm, enough rigidity and intensity are arranged, total quality is good, and speed of production is fast, can thoroughly solve the soft-belt heat-insulation butt-welding type steel-plastic composite pipe of corrosion problem.

Physical property according to anti-high thermal fiber materials such as transmission of heat basic principle and glass yarn, at prior art, existing questions in No. 99221195.6 patent applications particularly, basic design of the present utility model is: select for use steel band butt joint vertical masonry joint to being welded into pipe, and at the weld seam inner face along one of the weld seam card lining soft band that easily and herein the tube wall shape keeps in full accord and bonding is firm is formed by resistant to elevated temperatures fibrages such as glass yarn, in case welding the time make in plastic tube impaired, inside and outside this thin-wall steel tube respectively by the compound external diameter of polymer bond layer and internal diameter respectively with this steel pipe within footpath and external diameter corresponding to inside and outside plastic tube.Thereby realization purpose of design.

Soft-belt heat-insulation butt-welding type steel-plastic composite pipe described in the utility model, it is characterized in that this composite pipe from inside to outside successively by adhesive layer 2 in the plastic inner pipe 1 that bonds together mutually, the macromolecule, when being positioned under the weld seam in order to welding heat insulation high-temperature resistant fiber braiding soft with 3, outer adhesive layer 6 of butt joint type cylindrical steel tube 5, macromolecule and the plastic outer tube 7 that is connected to straight weld 4 constituted by steel band.

The utility model has the advantages that: can welding wall thickness 0.5～2mm, can to produce tubing and physical dimension that diameter is 32～160mm accurate, enough rigidity and intensity are arranged, can produce in enormous quantities continuously with production line, weld seam down heat insulationly both can avoid interior plastic tube impaired with soft being with, again can be easy and simple to handle from reaching the standard grade on one side, accurately locate easily, with compound firm inside and outside the steel pipe inwall card lining compact and smooth, total quality is good, replaces fished pipe with thin steel band, can save great deal of steel, speed of production is fast, can reduce production costs significantly, inside and outside all composite plastic pipes, non-corrosive is corrosion-resistant, and purposes is wide.

Accompanying drawing 1 is one of the utility model most preferred embodiment bulk shape structural upright schematic representation;

Accompanying drawing 2 is Fig. 1 cross-sectional structure schematic representation.

In conjunction with the accompanying drawings and most preferred embodiment, further describe structure characteristic of the present utility model as follows: on the outer wall of the PE matter plastic inner pipe of extruding with plastic extruder 1, coat in the macromolecule behind the adhesive layer 2, the high-temperature resistant fiber braiding that one of card lining is formed by glass braid below the stand-by thin-wall steel tube butt joint of butt joint deposit earlier is soft is with 3 and thereon behind the coating adhesive, compound more above-mentioned butt joint and served as a contrast the steel pipe of soft band and on opposite joint, welded out the butt joint type Steel Thin-Wall pipe 5 of butt joint straight weld 4, manage at this again and be coated with polymer bond layer 6 on 5 outer walls, clad the polyethylene matter plastic outer tube of extruding by plastic extruder 7 at last.

Change as present embodiment:

1, the raw material of inside and outside plastic tube all can be used crosslinked PE, PVC and other plastics instead;

2, the soft band of heat insulation usefulness can be formed by other high-temperature resistant fiber braidings.

Claims

1, a kind of soft-belt heat-insulation butt-welding type steel-plastic composite pipe, it is characterized in that this composite pipe from inside to outside successively by adhesive layer [2] in the plastic inner pipe that bonds together mutually [1], macromolecule, when being positioned under the weld seam in order to welding heat insulation high-temperature resistant fiber weave soft band [3], by butt joint type cylindrical steel tube [5], macromolecule outer adhesive layer [6] and plastic outer tube [7] formation of steel band to being connected to straight weld [4].