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Double-plastic reinforced composite winding pipe

A technology of reinforced composite and wound pipes, which is applied in the direction of pipes, rigid pipes, pipes/pipe joints/pipe fittings, etc. It can solve the problems that full PE pipes cannot meet the requirements of high strength, high production costs, and high prices of PE materials, and achieve savings materials, avoiding injuries, and reducing production costs

Pending Publication Date: 2018-11-09
上海瑞皇管业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the limitation of material performance, at present, the outer wall and inner wall of the spiral corrugated pipe are made of PE material, and the price of PE material is relatively high. The cost is high, and in some occasions that require high strength, all-PE pipes cannot meet the high-strength requirements

Method used

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  • Double-plastic reinforced composite winding pipe
  • Double-plastic reinforced composite winding pipe
  • Double-plastic reinforced composite winding pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1: A kind of double-plastic reinforced composite winding pipe (see figure 1 ), the winding tube has a smooth inner wall 4 and a spiral ring-shaped protrusion with a hollow structure. The winding tube is helically wound by a winding unit 7 with a hollow cavity 3 and overlapped on adjacent sides. The winding unit includes PP. The circumferentially closed inner tube 2 and the circumferentially closed outer tube 1 made of PE, the two sides of the outer tube have overlapping edges 9, and the winding unit is made of the inner tube at a state lower than the melting temperature and the PE in the molten state. It is extruded and compounded. The outer tube wraps tightly around the inner tube. After spiral winding, the adjacent sides of the outer tube overlap to form a smooth inner wall, and the inner tube forms a spiral ring-shaped protrusion with a hollow structure.

[0029] The cross-section of the inner tube is a rounded triangle shape. When the winding unit is spir...

Embodiment 2

[0035] Embodiment 2: A double-plastic reinforced composite winding pipe. The difference from Embodiment 1 is that there are concave recesses distributed on the inner pipe at intervals. The recesses are long strips, and the length direction of the recesses is along the inner pipe. The circumferential direction is perpendicular to the axis of the inner tube, the distribution direction of the recesses is along the axis of the inner tube, and the recesses are distributed at equal intervals. The concave part is formed by the rotary extrusion of the extrusion wheel with the convex part on the outer circumference of the inner tube before co-extrusion compounding. The linear speed of the extrusion wheel is the same as the advancing speed of the co-extrusion composite of the inner tube, the extrusion wheel is arranged on the side of the inner tube, and the rotation axis of the extrusion wheel is perpendicular to the axis of the inner tube. In this embodiment, the cross-section of the i...

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Abstract

The invention relates to a double-plastic reinforced composite winding pipe which solves the problem that an existing double-wall corrugated pipe is made of a high-density polyethylene (HDPE) material, so that the cost is high. The double-plastic reinforced composite winding pipe is provided with a smooth inner wall, and spiral annular bulges with a hollow structures; winding units with hollow cavities spirally wind and are in lap joint at adjacent side edges so as to form the winding pipe; each winding unit comprises a circumferential sealed inner pipe made of propene polymer (PP) and a circumferential sealed outer pipe made of poly ethylene (PE); two sides of each outer pipe are provided with lap-joint edges; each winding unit is formed by the inner pipe at the state with the temperaturebeing below the melting temperature and the PE at the melting state through coextrusion lamination; and each outer pipe clasps each inner pipe through a coating way. Each winding unit is provided with two pipes which are the inner pipe and the outer pipe covering and clasping the inner pipe, each inner pipe is made of the PP, each outer pipe is made of the PE, the PE coats the PP, the inner pipemade of the PP has better strength compared with the pipe made of the PE, and the cost is further reduced.

Description

technical field [0001] The invention relates to a winding pipe structure, in particular to a double-plastic reinforced composite winding pipe composed of PE and PP. Background technique [0002] Corrugated pipe is a new type of pipe with a ring-shaped outer wall and a smooth inner wall. Winding corrugated pipes are obtained by continuous winding to obtain pipes of unlimited length. Most of them are made of high-density polyethylene (HDPE). High-quality pipes have the characteristics of light weight, high pressure resistance, good toughness, and fast construction. They are used to replace concrete pipes and cast iron pipes. [0003] However, due to the limitation of material performance, at present, the outer wall and inner wall of the spiral corrugated pipe are made of PE material, and the price of PE material is relatively high. The cost is high, and in some occasions that require high strength, all-PE pipes cannot meet the high-strength requirements. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L9/16
CPCF16L9/16
Inventor 曹能健
Owner 上海瑞皇管业科技股份有限公司
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