CN216407980U

CN216407980U - Continuous fiber lattice structure reinforced thermoplastic pressure composite pipe

Info

Publication number: CN216407980U
Application number: CN202122710659.4U
Authority: CN
Inventors: 杨维国
Original assignee: Sichuan Huike Hechuang Machinery Technology Co ltd
Current assignee: Sichuan Huike Hechuang Machinery Technology Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-04-29
Anticipated expiration: 2031-11-08

Abstract

A continuous fiber lattice structure reinforced thermoplastic pressure composite pipe comprises a plastic inner pipe layer lattice structure reinforced core layer and a plastic outer pipe layer from inside to outside in sequence; the plastic inner pipe layer is formed by spirally winding and melting a plurality of layers of plastic strips one by one; the lattice structure reinforced core layer is formed by alternately superposing, melting and pasting three same flat laying layers and three same winding layers on the plastic inner pipe layer one by one; the first flat layer is formed by tiling, laying and melting a plurality of glass fiber plastic prepreg tapes on the outer surface of the plastic inner pipe layer along the axial direction of the inner pipe, the first winding layer is formed by spirally winding and melting 1 continuous glass fiber plastic prepreg tape on the outer surface of the first flat layer, the second flat layer is formed by laying and melting a second winding layer on the outer surface of the first winding layer, and the rest is done in the same way. The pipe has high rigidity and flexibility, can bear high pressure load, has high practicability and is suitable for popularization and use.

Description

Continuous fiber lattice structure reinforced thermoplastic pressure composite pipe

Technical Field

The utility model belongs to the field of plastic composite pipeline manufacturing, and particularly relates to a continuous fiber lattice structure reinforced thermoplastic pressure composite pipe.

Background

As a novel composite pipeline, the Continuous Fiber Reinforced (CFRT) plastic pipe has a series of unique advantages of light weight, high strength, low cost, corrosion resistance, environmental protection and the like, has huge application prospects in the fields of municipal administration, water conservancy, coal, chemistry, oil gas and the like, and is widely concerned by the pipeline industry, so that the continuous glass fiber reinforced polyethylene pipe composite material and the process research thereof are very rapidly developed in recent years.

Pipeline enterprises at home and abroad deeply research the continuous fiber reinforced pipe composite material and the process thereof and obtain some achievements, for example, the JEC American innovation prize is obtained in 2012 for the continuous fiber reinforced thermoplastic reinforced composite pipe successfully developed by the Netherlands Airbone company. The U.S. enterprise Composite Fluid Transfer LLC developed a successful continuous fiber reinforced polyethylene pipe awarded 2013 JEC U.S. innovation. Domestic enterprises such as chenguang, weixing, henning and the like are also actively developing fiber reinforced composite pipes and the like. However, most of the products are concentrated in the market fields of small-caliber (less than 200 mm) pipelines or low-pressure drainage pipelines, the development field of large-caliber pipelines has the defects of high product cost, low production efficiency, low market competitiveness and the like, large-scale popularization and application in the market of the large-caliber pipelines cannot be realized, and the fiber reinforced large-caliber thermoplastic pipelines are in the development stage at home and abroad.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the defects of the prior art and provides a continuous fiber lattice structure reinforced thermoplastic pressure composite pipe with simple structure, convenient manufacture and high mechanical property, which is suitable for the transportation occasions of large-caliber high-pressure liquid and gas pipelines.

The novel purpose is realized as follows: a continuous fiber lattice structure reinforced thermoplastic pressure composite pipe comprises a plastic inner pipe layer, a lattice structure reinforced core layer and a plastic outer pipe layer from inside to outside in sequence; the plastic inner pipe layer is formed by spirally winding a plurality of layers of plastic strips one by one and then fusing the plastic strips into a whole; the lattice structure reinforced core layer is formed by alternately superposing a flat layer and a winding layer on a plastic inner pipe layer one by one: the first flat layer is formed by tiling, laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the plastic inner pipe layer along the axial direction of the inner pipe, the first winding layer is formed by spirally winding and fusing 1 continuous glass fiber plastic prepreg tape on the outer surface of the first flat layer, the second flat layer is formed by tiling, laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the first winding layer along the axial direction of the inner pipe, the second winding layer is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the second flat layer, the third flat layer is formed by tiling, laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the second winding layer along the axial direction of the inner pipe, and the third winding layer is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the third winding layer.

The winding included angle alpha of the plastic prepreg tape in the winding layer takes 70-88 degrees; and the lap joint between two adjacent belts in the flat laying layer is 0-20 mm.

The plastics of the plastic inner pipe layer and the plastic outer pipe layer and the plastics of the plastic prepreg tapes of both the lay-up layer and the winding layer are selected from PP, PE, PERT, CWPP, CWPE, DRPO, CWPP, CWPE or other thermoplastics.

The plastic outer pipe layer is formed by continuously winding and fusing thermoplastic plastic belts with different structural bodies on the outer surface of the dot matrix structure reinforced light layer, and the structural bodies comprise rectangles, trapezoids, triangles, U-shaped shapes and circles.

The flat layer and the winding layer are 3 layers, and the thickness of the glass fiber prepreg tape of the flat layer and the winding layer is 0.25mm to 0.4 mm; the thickness of the plastic inner pipe layer is 8 mm-20 mm; the inner hollow diameter of the pressure composite tube is 400 mm-4000 mm.

The number of the glass fiber plastic prepreg tapes in the flat laying layer is even.

The beneficial technical effects of the utility model are as follows:

1. the utility model has reasonable structural design, convenient and quick manufacture, high practicability and is suitable for popularization and use;

2. the pipe material has high rigidity and high flexibility, can bear external pressure load, is a high-rigidity, tensile and compressive composite pipe, and is suitable for large-caliber and high-pressure liquid pipelines and gas conveying occasions.

Drawings

FIG. 1 is a schematic cross-sectional view of the tube of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the figures and the detailed description.

The utility model relates to a continuous fiber lattice structure reinforced thermoplastic pressure composite pipe which is shown in figure 1 and sequentially comprises a plastic inner pipe layer 1, a lattice structure reinforced core layer 2 and a plastic outer pipe layer 3 from inside to outside, wherein the caliber (hollow diameter) of the pipe is 400-4000 mm.

A continuous fiber lattice structure reinforced thermoplastic pressure composite pipe comprises a plastic inner pipe layer 1, a lattice structure reinforced core layer 2 and a plastic outer pipe layer 3 from inside to outside in sequence; the plastic inner pipe layer 1 is formed by spirally winding a plurality of layers of plastic strips one by one and then fusing the plastic strips into a whole; the lattice structure reinforced core layer 2 is formed by alternately superposing a flat laying layer and a winding layer on the plastic inner pipe layer 1 one by one: the first flat layer 211 is formed by flatly laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the plastic inner pipe layer 1 along the axial direction of the inner pipe, the first winding layer 221 is formed by spirally winding and fusing 1 continuous glass fiber plastic prepreg tape on the outer surface of the first flat layer 211, the second flat layer 212 is formed by flatly laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the first winding layer 221 along the axial direction of the inner pipe, the second winding layer 222 is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the second flat layer 212, the third flat layer (213) is formed by flatly laying and fusing a plurality of glass fiber plastic prepreg tapes on the outer surface of the second winding layer (222) along the axial direction of the inner pipe, and the third winding layer (223) is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the third flat layer (213).

A continuous fiber lattice structure reinforced thermoplastic pressure composite pipe is characterized in that the winding included angle alpha of a plastic prepreg tape in a winding layer takes 70-88 degrees; and the lap joint between two adjacent belts in the flat laying layer is 0-20 mm.

A continuous fibre lattice structure reinforced thermoplastic pressure composite pipe, the plastics of the plastic inner pipe and outer pipe layers 3 and the plastics of the plastic prepreg tapes of both the lay-up and the wrap layers being selected from PP, PE, PERT, CWPP, CWPE, DRPO, CWPP, CWPE or other thermoplastics.

The utility model provides a continuous fibers lattice structure reinforcing thermoplasticity pressure composite pipe, the outer pipe layer of plastics is twined in succession by the thermoplasticity plastic strip of different shape structures and is fused the subsides and constitute at lattice structure reinforcing sandwich layer surface, and above-mentioned structure includes rectangle, trapezoidal, triangle-shaped, U type and circular, and the outer pipe layer of plastics is mainly used for increasing composite pipe rigidity.

A thermoplastic pressure composite pipe with a continuous fiber lattice structure is reinforced, wherein the horizontal layer and the winding layer are 3 layers, and the thickness of a glass fiber prepreg tape of the horizontal layer and the winding layer is 0.25mm to 0.4 mm; the thickness of the plastic inner pipe layer 1 is 8 mm-20 mm.

In fig. 1, the widths of the tapes of the layers in the first, second and third

winding layers

211, 212 and 213 are the same or different, and the winding included angle of the tapes of the layers in the first, second and third winding layers is alpha (70-88 °) or-alpha (-70-88 °).

The utility model is a three-layer integrated high-rigidity, tensile and compressive composite pipe body consisting of a plastic inner pipe layer 1, a lattice structure reinforced core layer 2 and an outer layer 3. The lattice structure reinforced core layer 2 is used for independently bearing or jointly bearing the comprehensive stress of the axial tension and the circumferential pressure of the composite pipe with the inner plastic pipe and the outer plastic pipe.

Hoop load (stress): the hoop stress formed by the internal pressure is borne by the spirally wound continuous fiber belt layer, and the safety factor 3 is designed.

Axial load (stress): axial stress due to uneven sagging or the like during manufacturing and handling and after burying is received by the continuous fiber prepreg tape layer which is hot-melt laid in the axial direction.

External pressure loading: the outer layer adopts a structural diagram form, and the pipe has high rigidity and high flexibility and can bear external pressure load (such as buried laying).

The experiment shows that the high pressure of the pipeline system is 0.4MPa to 1.6MPa, and the requirement of the large diameter of more than 600mm to 4000mm on the comprehensive mechanics of axial tension and annular pressure is met.

Claims

1. A thermoplastic pressure composite pipe with a continuous fiber lattice structure reinforced is characterized by sequentially comprising a plastic inner pipe layer (1), a lattice structure reinforced core layer (2) and a plastic outer pipe layer (3) from inside to outside; the plastic inner pipe layer (1) is formed by spirally winding a plurality of layers of plastic strips one by one and then melting the plastic strips into a whole; the lattice structure reinforcing core layer (2) is formed by alternately superposing a flat laying layer and a winding layer on a plastic inner pipe layer (1) one by one: the first flat layer (211) is formed by flatly laying a plurality of glass fiber plastic prepreg tapes along the axial direction of the inner pipe, and is fused and adhered to the outer surface of the plastic inner pipe layer (1), the first winding layer (221) is formed by spirally winding and fusing 1 continuous glass fiber plastic prepreg tape on the outer surface of the first flat layer (211), the second flat layer (212) is formed by flatly laying a plurality of glass fiber plastic prepreg tapes along the axial direction of the inner pipe, and is fused and adhered to the outer surface of the first winding layer (221), the second winding layer (222) is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the second flat layer (212), the third flat layer (213) is formed by flatly laying and fusing a plurality of glass fiber plastic prepreg tapes along the axial direction of the inner pipe, and is adhered to the outer surface of the second winding layer (222), and the third winding layer (223) is formed by spirally winding and fusing one continuous glass fiber plastic prepreg tape on the outer surface of the third flat layer (213).

2. The continuous fiber lattice structure reinforced thermoplastic pressure composite pipe according to claim 1, wherein the winding included angle α of the plastic prepreg tape in the winding layer is 70-88 °; and the lap joint between two adjacent belts in the flat laying layer is 0-20 mm.

3. The continuous fiber lattice structure reinforced thermoplastic pressure composite pipe according to claim 1, wherein the plastic of the plastic inner pipe layer (1) and the plastic outer pipe layer (3) and the plastic of the plastic prepreg tape of both the lay-up layer and the winding layer are selected from PP, PE, PERT, CWPP, CWPE, DRPO, CWPP or CWPE.

4. The continuous fiber lattice structure reinforced thermoplastic pressure composite pipe according to claim 1 or 3, wherein the plastic outer pipe layer (3) is formed by continuously spirally winding and fusing thermoplastic plastic strips of different structural shapes on the outer surface of the lattice structure reinforced core layer (2), and the structural shapes comprise a rectangle, a trapezoid, a triangle, a U shape and a circle.

5. The continuous fiber lattice structure reinforced thermoplastic pressure composite pipe of claim 4, wherein the lay-flat layer and the wrapped layer are 3 layers, and the thickness of the glass fiber prepreg tape of the lay-flat layer and the wrapped layer is 0.25mm to 0.4 mm; the thickness of the plastic inner pipe layer (1) is 8-20 mm; the inner hollow diameter of the pressure composite pipe is 400-4000 mm.

6. The continuous fiber lattice structure reinforced thermoplastic pressure composite pipe of claim 5 wherein the number of fiberglass plastic prepreg tapes in the lay-up is even.