Composite steel-plastic pressure tube and manufacturing method thereof

A steel-plastic composite and pressure pipe technology, applied to pipes, rigid pipes, tubular objects, etc., can solve the problems of reduced pressure bearing capacity, waste, and reduced metal utilization of pipes, so as to avoid the growth of microorganisms and water pollution , the effect of reducing production costs

Inactive Publication Date: 2014-04-30
XINXING DUCTILE IRON PIPES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) The perforated mesh steel belt polyethylene composite pipe, its product structure is a steel pipe with round holes contained in polyethylene, which can solve the quality problem of bonding and delamination from the process, but the steel pipe layer is an incomplete welded pipe, plastic The plastic layer also bears a certain pressure-bearing effect. When the temperature rises or the plastic layer ages, its pressure-bearing capacity will inevitably decrease; the effect obtained by adding a metal skeleton to reinforce the compound is not very significant.
[0004] 2) Steel mesh skeleton plastic (polyethylene) composite pipe, its product structure is to wind steel wire in polyethylene plastic pipe to strengthen polyethylene pipe, the pressure-bearing layer of this form of pipe is not a complete steel pipe, polyethylene in this pipe Therefore, changes in external factors and the aging of polyethylene will have an impact on the pressure-bearing capacity and reliability of the pipe.
The reduction of the strength of the welding seam causes the reduction of the strength of the whole pipe, which reduces the utilization rate of the pipe metal and causes a lot of waste

Method used

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  • Composite steel-plastic pressure tube and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1, such as figure 1 As shown, a steel-plastic composite pressure pipe includes an outer plastic layer 1, an outer rubber layer 2, an inner rubber layer 4 and an inner plastic layer 5, and is characterized in that: between the outer rubber layer 2 and the inner rubber layer 4 is A steel pipe 3 with a rough surface; the thickness of the weld 6 on the steel pipe 3 is 4% thicker than that of the steel pipe 3;

[0031] The surface roughness of the steel pipe 3 is Ra12.5;

[0032] The outer plastic layer 1 and the inner plastic layer 5 are polyethylene;

[0033] The outer rubber layer 2 and the inner rubber layer 4 are ethylene copolymer hot melt adhesives.

[0034] The manufacturing steps of the above-mentioned steel-plastic composite pressure pipe are as follows:

[0035] 1) Use laser textured rollers to roll and texturize the steel plate used to form a rough surface on the steel plate;

[0036] 2) Process the steel plate into a steel strip of the required width...

Embodiment 2~12

[0042] Embodiments 2 to 12 differ from Example 1 in that the materials of the inner and outer plastic layers and the inner and outer rubber layers, the surface roughness of the steel pipe and the thickening of the weld seam, the materials of the inner and outer plastic layers and the inner and outer rubber layers, and the rough surface of the steel pipe The thickness, weld thickness and performance parameters are shown in Table 1.

[0043] Table 1 Performance parameters of steel-plastic composite pressure pipe

[0044]

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Abstract

The invention discloses a composite steel-plastic pressure tube and a manufacturing method thereof, and belongs to the technical field of composite steel-plastic tubes. The composite steel-plastic pressure tube comprises an outer plastic layer, an outer glue layer, an inner glue layer and an inner plastic layer. A steel tube with the rough surface is arranged between the outer glue layer and the inner glue layer. In the manufacturing process of the composite steel-plastic pressure tube, a laser texturing roller carries out rolling and texturing on an adopted steel plate, so that a rough surface is formed on the steel plate, and then the steel plate is processed into steel belts with required widths; the steel belts are rolled to be of tubular shapes under the extrusion state, and an inner plastic layer tube coated with hot melt glue is inserted synchronously; the tungsten electrode argon arc butt welding process is adopted for welding of welding lines, and a steel tube is formed; through a high frequency heater, adhesion of the inner plastic layer tube and the steel tube is achieved; the hot melt glue coats the steel tube, and the outer plastic layer is arranged outside the steel tube. According to the composite steel-plastic pressure tube, the adhesion strength between the outer plastic layer and the steel tube is high, the pressure-bearing capacity is high, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of steel-plastic composite pipes. Background technique [0002] At present, the main types of pipes used in the field of steel-plastic composite pressure pipes are: [0003] 1) The perforated mesh steel belt polyethylene composite pipe, its product structure is a steel pipe with round holes contained in polyethylene, which can solve the quality problem of bonding and delamination from the process, but the steel pipe layer is an incomplete welded pipe, plastic The layer also bears a certain pressure-bearing effect. When the temperature rises or the plastic layer ages, its pressure-bearing capacity will inevitably decrease; the effect obtained by adding a metal skeleton to strengthen the composite is not very significant. [0004] 2) Steel mesh skeleton plastic (polyethylene) composite pipe, its product structure is to wind steel wire in polyethylene plastic pipe to strengthen polyethylene pipe, the pressure-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147
CPCF16L9/147B29D23/00
Inventor 李铁良陈芹英张红斌
Owner XINXING DUCTILE IRON PIPES CO LTD
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