PE (Poly Ethylene) water supply reinforced pipe

Abstract

The utility model relates to a PE (Poly Ethylene) water supply reinforced pipe which comprises an inner layer, a middle layer and an outer layer, the inner layer and the outer layer are made of high-density polyethylene resin, the middle layer is a hole net pipe steel framework, and the hole net pipe steel framework is adhered with the high-density polyethylene resin of the inner layer and the outer layer through hot melt adhesive. According to the PE water supply reinforced pipe, the steel-plastic composite technology is adopted, the PE plastic pipe is improved from the product structure, the problem that the wall thickness is not uniform is solved, and nearly half of raw materials are saved. The product has high compressive strength and creep resistance, good ring stiffness and impact resistance, low linear expansion coefficient and heat conductivity coefficient, good weldability, environmental stress cracking resistance and rapid cracking resistance, and is convenient to construct, simple in welding process and low in engineering comprehensive cost.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe water supply, in particular to a PE water supply reinforced pipe. Background Art

[0002] PE plastic pipes are widely used in municipal, chemical, civil water and gas transmission fields due to their light weight, convenient transportation and construction, and corrosion resistance. When the pressure corresponding to the wall thickness of solid PE plastic pipes reaches or exceeds 2.5MPa during water supply and transportation, due to the limitation of PE melt index, the melt sags from the die to the sizing sleeve after heating, and the uniformity of the overall pipe wall thickness is difficult to adjust, which will bring certain difficulties to production. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the utility model provides a PE water supply reinforced pipe, which uses steel-plastic composite technology to improve the PE plastic pipe in terms of product structure, which not only solves the problem of uneven wall thickness, saves nearly half of the raw materials, but also ensures that the compressive strength is not reduced.

[0004] In order to achieve the above object, the technical solution of the utility model is as follows:

[0005] A PE water supply reinforced pipe comprises an inner layer, a middle layer and an outer layer, wherein the inner layer and the outer layer are high-density polyethylene resins, the middle layer is a mesh tube steel skeleton, and the mesh tube steel skeleton is bonded to the high-density polyethylene resins of the inner layer and the outer layer by hot melt adhesive.

[0006] As a preferred technical solution, the mesh tube steel skeleton is welded from cold-rolled steel strips.

[0007] As a preferred technical solution, the thickness of the steel strip is 0.2 mm to 0.6 mm.

[0008] As a preferred technical solution, the diameter of the holes on the perforated tube steel skeleton is 0.5 mm to 3.0 mm.

[0009] As a preferred technical solution, the hot melt adhesive is maleic anhydride grafted polyethylene.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) The PE water supply reinforced pipe of the utility model adopts a perforated mesh pipe welded with cold-rolled steel strip as a reinforcing skeleton, and is compounded with thermoplastic PE resin and maleic anhydride grafted polyethylene (hot melt adhesive) through three extruders and a composite mold. It has the advantages of high strength, high rigidity and low cost of steel itself, and the designed maximum pressure can reach more than 2.5MPa, which can meet the requirements of ultra-high pressure water transportation.

[0012] (2) In the PE water supply reinforced pipe of the utility model, maleic anhydride grafted polyethylene (hot melt adhesive) is used to bond the mesh steel skeleton and the PE resin, which has good bonding performance, and it is not easy to delaminate the plastic body and the steel skeleton structure layer. The structure is relatively stable and the compressive performance is good.

[0013] (3) The PE water supply reinforced pipe of the utility model has high compressive strength and creep resistance, good ring stiffness and impact resistance, low linear expansion coefficient and thermal conductivity, good weldability, resistance to environmental stress cracking and resistance to rapid cracking, convenient construction, simple welding process and low overall project cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of the PE water supply reinforced pipe of the utility model;

[0015] Figure 2 It is a structural schematic diagram of a perforated pipe steel skeleton in a PE water supply reinforced pipe of the utility model.

[0016] In the figure: 1. Outer layer; 2. Middle layer; 3. Inner layer. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described below in conjunction with specific implementation methods:

[0018] like Figure 1 As shown, a PE water supply reinforced pipe includes an inner layer 3, an intermediate layer 2 and an outer layer 1, wherein the inner layer 3 and the outer layer 1 are high-density polyethylene resins, the intermediate layer 2 is a mesh steel skeleton, and the mesh steel skeleton is bonded to the high-density polyethylene resins of the inner layer 3 and the outer layer 1 by hot melt adhesive. The pipe is made of a mesh tube welded with cold-rolled steel strips as a reinforced skeleton, and thermoplastic PE resin and maleic anhydride grafted polyethylene (hot melt adhesive) are compounded through three extruders and a composite mold. It has the advantages of high strength, high rigidity and low cost of steel itself, and the maximum design pressure can reach more than 2.5MPa, which can meet the requirements of ultra-high pressure water transportation.

[0019] The steel skeleton of the perforated mesh tube is welded from cold-rolled steel strips.

[0020] The thickness of the steel strip is 0.2mm to 0.6mm.

[0021] The diameter of the holes on the mesh tube steel frame is 0.5mm to 3.0mm.

[0022] The mesh tube steel frame and high-density polyethylene resin are bonded with maleic anhydride grafted polyethylene (hot melt adhesive), which has good bonding performance, and it is not easy to delaminate between the plastic part body and the steel frame structural layer. The structure is relatively stable and has good compressive resistance.

[0023] The product has high compressive strength and creep resistance, good ring stiffness and impact resistance, low linear expansion coefficient and thermal conductivity. It has good weldability, environmental stress cracking resistance and rapid cracking resistance, convenient construction, simple welding process and low comprehensive engineering cost.

[0024] This embodiment is only a further explanation of the utility model, not a limitation of the utility model. After reading this specification, those skilled in the art can make non-creative modifications to the embodiment as needed, but as long as it is within the scope of the claims of the utility model, it will be protected by the patent law.

Claims

1. A PE water supply reinforced pipe, characterized in that: It comprises an inner layer, a middle layer and an outer layer, wherein the inner layer and the outer layer are high-density polyethylene resin, the middle layer is a mesh tube steel skeleton, and the mesh tube steel skeleton is bonded to the high-density polyethylene resin of the inner layer and the outer layer by hot-melt adhesive.

2. The PE water supply reinforced pipe according to claim 1, characterized in that: The mesh tube steel skeleton is formed by welding cold-rolled steel strips.

3. The PE water supply reinforced pipe according to claim 2, characterized in that: The thickness of the steel strip is 0.2 mm to 0.6 mm.

4. The PE water supply reinforced pipe according to claim 1, characterized in that: The diameter of the holes on the perforated pipe steel skeleton is 0.5 mm to 3.0 mm.

5. The PE water supply reinforced pipe according to claim 1, characterized in that: The hot melt adhesive is maleic anhydride grafted polyethylene.

Images