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Large-caliber steel reinforced plastic pipe and flange

A large-diameter plastic pipe technology, applied in the pipeline field, can solve the problems of large-diameter plastic pressure pipes, such as complicated process, high production cost, and many equipments, and achieve the effects of avoiding the separation of steel and plastic, low cost and convenient manufacture

Inactive Publication Date: 2019-08-02
成都国通实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a large-diameter steel reinforced plastic pipe in view of the problems in the prior art that the assembly method used to manufacture large-diameter plastic pressure pipes is complex, requires many and expensive equipment, and has high production costs and low efficiency. Tube and Flange

Method used

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  • Large-caliber steel reinforced plastic pipe and flange
  • Large-caliber steel reinforced plastic pipe and flange
  • Large-caliber steel reinforced plastic pipe and flange

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Such as Figure 1-3 As shown, the large-diameter steel-reinforced plastic pipe of the present invention includes a plastic inner pipe 1 and a steel pipe 2, and the outer diameter of the plastic inner pipe 1 is adapted to the inner diameter of the steel pipe 2.

[0047] Such as figure 1 As shown, the plastic inner tube 1 includes a plurality of tube segments 12, all of the tube segments 12 can be spliced ​​sequentially to form the plastic inner tube 1, and the plastic inner tube 1 is a PE material plastic tube.

[0048] Such as figure 2 As shown, each tube piece 12 is provided with at least one counterbore 11, two adjacent counterbores 11 are staggered, and each counterbore 11 corresponds to a hole 21, and all the holes 21 is located on the inner wall of the steel pipe 2.

[0049] Each countersunk hole 11 is connected to the corresponding hole 21 by a bolt 3. The bolt 3 is a plastic bolt, and a plastic cover is connected to the countersunk head of the countersunk hole 11 corr...

Embodiment 2

[0055] Such as figure 1 , 4 As shown in and 5, the large-diameter steel reinforced plastic pipe of the present invention includes a plastic inner pipe 1 and a steel pipe 2, and the outer diameter of the plastic inner pipe 1 is adapted to the inner diameter of the steel pipe 2.

[0056] Such as Figure 4 As shown, at least one layer of steel mesh 6 is welded on the inner wall of the steel pipe 2, all the steel meshes 6 are welded to the inner wall of the steel pipe 2, and all the steel meshes 6 are embedded in the plastic inner pipe 1. The outer wall of the plastic inner tube 1 is bonded to the inner wall of the steel pipe 2, and the plastic inner tube 1 is a PE material plastic tube.

[0057] The outer wall of the steel pipe 2 is connected with a protective pipe 5 to protect the outer wall of the steel pipe 2 from corrosion. The protective pipe 5 is a plastic outer pipe. At least one layer of the steel mesh 6 is welded on the outer wall of the steel pipe 2. The steel mesh 6 is embe...

Embodiment 3

[0061] Such as Image 6 As shown, a large-diameter steel-plastic composite flange according to the present invention includes a steel pipe 2 and a steel flange 7 connected to it.

[0062] The inner and outer walls of the steel pipe 2 and the surface of the steel flange 7 are welded with at least one layer of steel mesh 6, all the steel meshes 6 are embedded in the plastic layer 8, and the steel flange 7 is provided with There are several flange holes 9, all of which pass through the corresponding steel mesh 6 and the corresponding plastic layer 8. The plastic layer 8 is a PE material plastic layer.

[0063] Using the large-caliber steel-plastic composite flange of the present invention, the steel mesh 6 is connected to the inner and outer walls of the steel pipe 2 and the surface of the steel flange 7, and a plastic layer 8 is formed by hot-melt coating at the position of the steel mesh 6 , The plastic coating completely wraps the steel mesh 6, which is embedded in the formed plast...

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Abstract

The invention relates to a large-caliber steel reinforced plastic pipe. The large-caliber steel reinforced plastic pipe comprises a plastic inner pipe and a steel pipe. The external diameter of the plastic inner pipe adapts to the internal diameter of the steel pipe. The plastic inner pipe comprises multiple pipe pieces. At least one counterbore is formed in each pipe piece, each counterbore corresponds to a hole, all the holes are located in the inner wall of the steel pipe, each counterbore and the corresponding hole are connected through a bolt, the countersink position of the counterbore corresponding to each bolt head is connected with a plastic cover plate, and every two adjacent pipe pieces are in sweat soldering. Each pipe piece is a straight plate, is pressed on the inner wall ofthe steel pipe through the corresponding bolt, and is restrained into a bent plate. By means of the large-caliber steel reinforced plastic pipe, the plastic inner pipe and the steel pipe are effectively connected into a whole through the bolts, steel and plastic separation is avoided, the characteristics of corrosion resistance of the plastic inner pipe and pressure resistance of the steel pipe are fully kept, the bolt heads are sealed through the plastic cover plates, the inner wall of the plastic inner pipe is kept consistent, and the steel reinforced plastic pipe is simple in structure, convenient to manufacture and good in effect.

Description

Technical field [0001] The invention relates to the field of pipelines, in particular to a large-diameter steel reinforced plastic pipe and flange. Background technique [0002] The manufacture of large-diameter (diameter greater than 2m) plastic pressure pipes has always been a problem in the industry. For example, the use of extrusion molding to produce large-diameter plastic pressure pipes requires expensive production equipment. At the same time, it is easy to cause the pressure pipe wall thickness to fail to meet the requirements, eccentricity, and uniformity. Poor axial degree, bubbles and other defects, which lead to problems such as unqualified quality and low yield. Therefore, the industry has proposed a method of producing large-diameter plastic pressure pipes with tube-slice assembly (similar to tunnel support in shield subway construction). The segments are combined into a circular tunnel). [0003] However, due to the large size and thickness of the plastic pressure t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/147
CPCF16L9/147
Inventor 冯光淑
Owner 成都国通实业有限责任公司