Reinforced thermoplastic water supply and drainage pressure composite pipe with continuous fiber band grid structure

Abstract

The utility model relates to the field of manufacturing of plastic pipelines, in particular to a reinforced thermoplastic water supply and drainage pressure composite pipe with a continuous fiber belt grid structure, which sequentially comprises a plastic inner pipe layer, a grid structure reinforced core layer and an outer layer from outside to inside, the grid structure reinforced core layer is wrapped outside the plastic inner pipe layer, and the outer layer is wrapped outside the grid structure reinforced core layer. The outer layer covers the outside of the grid structure reinforced core layer, the grid structure reinforced core layer is formed by fusing and compounding a plurality of groups of grid structure laminating belts, the plastic inner pipe layer, the grid structure reinforced core layer and the outer layer form a three-layer high-rigidity, tensile and compression-resistant composite pipe body, and tests show that the high pressure of a pipeline system is 0.4 MPa-6. 4 Mpa, and the tensile strength of the pipeline system is 0.5 MPa-6. 4 Mpa. And the requirements of the large diameter of 600-4000 mm on the comprehensive mechanics of axial tension and circumferential pressure are met.

Description

Technical Field

[0001] The utility model relates to the field of plastic pipe manufacturing, in particular to a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe. Background Art

[0002] Plastic pipes are generally divided into thermoplastics and thermosetting plastics. They are generally made of synthetic resin as raw material, with stabilizers, lubricants and plasticizers added, and are extruded in a pipe making machine. They are mainly used as piping for tap water supply systems in buildings, drainage, exhaust and sewage sanitary pipes, underground drainage pipe systems, rainwater pipes, and threading pipes for wire installation, etc. In order to expand the use field and strength of plastic pipes, a new type of composite pipe is being developed at this stage, namely continuous limited reinforced plastic pipe, which has a series of unique advantages such as light weight, high strength, low cost, corrosion resistance, and green environmental protection. It has great application prospects in municipal, water conservancy, coal, chemical, oil and gas and other fields, and has received widespread attention from the pipeline industry. Therefore, in recent years, the research on continuous glass fiber reinforced polyethylene pipe composite materials and their processes has progressed rapidly.

[0003] Currently, most of the products on the market are concentrated in the market areas of small-diameter (below 200mm) pipes or low-pressure drainage pipes. However, the large-diameter pipe development field has shortcomings such as high product cost, low production efficiency, and weak market competitiveness, which makes it difficult to promote and apply them on a large scale in the large-diameter pipe market. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe which has a simple structure, is easy to manufacture and has high mechanical properties.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe, the pressure composite pipe comprises a plastic inner pipe layer, a grid structure reinforced core layer and an outer layer from inside to outside, the plastic inner pipe layer is coated with a grid structure reinforced core layer, the grid structure reinforced core layer is covered with an outer layer, and the grid structure reinforced core layer is composed of a plurality of groups of grid structure laminated belts melt-compounded.

[0007] Furthermore, the plastic inner tube layer is an inner tube formed by winding and melting plastic sheets into one, and the diameter of the tube is 600-4000mm.

[0008] Furthermore, the grid structure laminated tape includes, from the inside to the outside, a circumferential non-metallic continuous fiber tape, an axial non-metallic continuous fiber tape, a circumferential continuous steel wire fiber prepreg tape, and an axial continuous steel wire fiber prepreg tape.

[0009] Furthermore, the circumferential non-metallic continuous fiber belt and the circumferential continuous steel wire fiber prepreg belt are wound around the plastic inner tube layer in a circumferential spiral, the angle of the circumferential spiral is 75°-89°, and the gap between the belts is less than 1 mm.

[0010] Furthermore, the axial non-metallic continuous fiber tape and the axial continuous steel wire fiber prepreg tape are fused and laid axially along the plastic inner tube layer, and the gap between the tapes is less than 1 mm.

[0011] Furthermore, the belt width of the annular non-metallic continuous fiber belt and the annular continuous steel wire fiber prepreg belt is 100-800 mm, and the thickness is 0.3-1.2 mm.

[0012] Furthermore, the axial non-metallic continuous fiber tape and the axial continuous steel wire fiber prepreg tape have a tape width of 100-500 mm and a thickness of 0.3-1.2 mm.

[0013] Furthermore, the outer layer is formed by continuously winding and welding structures of different shapes, and the structures include one or more of the solid wall layers of rectangle, trapezoid, triangle, U-shape and circle.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] In the utility model, a three-layer composite pipe body with high rigidity, tensile resistance and compression resistance is formed by a plastic inner pipe layer, a grid structure reinforced core layer and an outer layer. According to test measurements, the high pressure of the pipeline system is 0.4MPa-6.4Mpa, which meets the comprehensive mechanical requirements of axial tension and annular pressure for large diameters of 600-4000mm;

[0016] According to different pressure levels, grid laminated tapes with different numbers of units are selected to form a grid structure reinforced core layer, and are produced by melt compounding. The production method is quick and convenient, highly practical, and suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe of the utility model;

[0019] Figure 2 The utility model is a schematic structural diagram of a grid structure reinforced core layer in a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe.

[0020] In the figure: 1. Plastic inner tube layer; 2. Grid structure reinforced core layer; 21. Grid structure laminated tape; 211. Annular non-metallic continuous fiber tape; 212. Axial non-metallic continuous fiber tape; 213. Annular continuous steel wire fiber prepreg tape; 214. Axial continuous steel wire fiber prepreg tape; 3. Outer layer. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0022] Example: Figure 1-2 As shown, a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe, the pressure composite pipe comprises a plastic inner pipe layer 1, a grid structure reinforced core layer 2 and an outer layer 3 from inside to outside, the plastic inner pipe layer 1 is coated with a grid structure reinforced core layer 2, the grid structure reinforced core layer 2 is covered with an outer layer 3, and the grid structure reinforced core layer 2 is composed of a plurality of groups of grid structure laminated belts 21 melt composited.

[0023] The plastic inner tube layer 1 is an inner tube formed by winding and melting plastic sheets, and the diameter of the tube is 600-4000mm.

[0024] The grid structure laminated tape 21 includes, from the inside to the outside, a circumferential non-metallic continuous fiber tape 211 , an axial non-metallic continuous fiber tape 212 , a circumferential continuous steel wire fiber prepreg tape 213 and an axial continuous steel wire fiber prepreg tape 214 .

[0025] Preferably, the annular non-metallic continuous fiber tape 211 and the axial non-metallic continuous fiber tape 212 are also thermoplastic continuous fiber tapes, including continuous glass fiber prepreg tapes, aramid tapes or polyester ribbons.

[0026] Preferably, the materials of the annular continuous steel fiber prepreg tape 213 and the axial continuous steel fiber prepreg tape 214 are PP, PE, PERT or other thermoplastics.

[0027] The annular non-metallic continuous fiber tape 211 and the annular continuous steel fiber prepreg tape 213 are wound around the plastic inner tube layer 1 in an annular spiral, the angle of the annular spiral is 75°-89°, and the gap between the tapes is less than 1 mm.

[0028] The axial non-metallic continuous fiber tape 212 and the axial continuous steel wire fiber prepreg tape 214 are axially laid and melt-bonded along the plastic inner tube layer 1, and the gap between the tapes is less than 1 mm.

[0029] The width of the annular non-metallic continuous fiber tape 211 and the annular continuous steel fiber prepreg tape 213 is 100-800 mm, and the thickness is 0.3-1.2 mm.

[0030] The axial non-metallic continuous fiber tape 212 and the axial continuous steel fiber prepreg tape 214 have a tape width of 100-500 mm and a thickness of 0.3-1.2 mm.

[0031] The outer layer 3 is formed by continuous winding and welding of structures of different shapes, and the structures include one or more of the solid wall layers of rectangle, trapezoid, triangle, U-shape and circle.

[0032] Therefore, in the preparation process of a continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe of the utility model, the plastic inner tube layer 1 is first determined, and then a circumferential non-metallic continuous fiber belt 211 is circumferentially spirally wound and fused to the outside of the plastic inner tube layer 1, and then multiple axial non-metallic continuous fiber belts 212 are axially laid and fused to the circumferential non-metallic continuous fiber belt 211 along the plastic inner tube layer 1 to form an axial laying layer, wherein during the circumferential winding, the winding angle between the belts is any angle between 75° and 89°, and the distance between the belts must be less than 1mm;

[0033] Afterwards, a circumferential continuous steel fiber prepreg tape 213 is circumferentially spirally wound and melted on the axially flattened fiber tape, and then multiple axially continuous steel wire limiting prepreg tapes 214 are axially laid and melted on the circumferential continuous steel fiber prepreg tape 213 along the plastic inner tube layer 1, thereby forming a layer of grid structure laminated tape 21 units, wherein when the circumferential continuous steel fiber prepreg tape 213 is circumferentially wound, the winding angle between the tapes is any angle between 75° and 89°, and the distance between the tapes must be less than 1 mm;

[0034] The grid structure reinforced core layer 2 is composed of a plurality of groups of grid structure laminated tapes 21 . Therefore, different grid structure laminated tapes 21 can be selected to form the grid structure reinforced core layer 2 according to different pressure levels.

[0035] The utility model comprises a three-layer composite pipe body with high rigidity, tensile resistance and compression resistance, which is composed of a plastic inner pipe layer 1, a grid structure reinforced core layer 2 and an outer layer 3. The grid structure reinforced core layer 2 bears the composite pipe axial tension and annular pressure combined stress independently or jointly with the inner plastic inner pipe layer 1 and the outer layer 3, wherein:

[0036] Hoop load (stress): The hoop stress formed by the internal pressure is borne by the spirally wound hoop non-metallic continuous fiber tape 211 and the hoop continuous steel fiber prepreg tape 214, with a design safety factor of 3;

[0037] Axial load (stress): The axial stress formed by uneven sinking during the manufacturing and handling process and after embedment is borne by the axial non-metallic continuous fiber tape 212 and the axial continuous steel wire fiber prepreg tape 214;

[0038] External pressure load: The outer layer adopts the structural diagram form, and the pipe has high rigidity and high flexibility, and can withstand external pressure load (such as underground laying);

[0039] Experimental measurements show that the high pressure of the pipeline system of the utility model is 0.4MPa-6.4MPa, which meets the comprehensive mechanical requirements of axial tension and annular pressure for large diameters of 600mm-4000mm.

Claims

1. A continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe, characterized in that: The pressure composite pipe comprises, from inside to outside, a plastic inner pipe layer (1), a grid structure reinforced core layer (2) and an outer layer (3); the plastic inner pipe layer (1) is coated with a grid structure reinforced core layer (2); the grid structure reinforced core layer (2) is coated with an outer layer (3); the grid structure reinforced core layer (2) is formed by melt-compounding a plurality of grid structure laminated tapes (21).

2. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 1, characterized in that: The plastic inner tube layer (1) is an inner tube formed by winding and melting plastic sheets into one, and the diameter of the tube is 600-4000 mm.

3. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 1, characterized in that: The grid structure laminated tape (21) comprises, from the inside to the outside, a circumferential non-metallic continuous fiber tape (211), an axial non-metallic continuous fiber tape (212), a circumferential continuous steel wire fiber prepreg tape (213), and an axial continuous steel wire fiber prepreg tape (214).

4. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 3, characterized in that: The annular non-metallic continuous fiber belt (211) and the annular continuous steel wire fiber prepreg belt (213) are wound around the plastic inner tube layer (1) in an annular spiral, the angle of the annular spiral is 75°-89°, and the gap between the belts is less than 1 mm.

5. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 3, characterized in that: The axial non-metallic continuous fiber tape (212) and the axial continuous steel wire fiber prepreg tape (214) are fused and laid axially along the plastic inner tube layer (1), with the gap between the tapes being less than 1 mm.

6. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 3, characterized in that: The annular non-metallic continuous fiber belt (211) and the annular continuous steel wire fiber prepreg belt (213) have a belt width of 100-800 mm and a thickness of 0.3-1.2 mm.

7. The continuous fiber belt grid structure reinforced thermoplastic water supply and drainage pressure composite pipe according to claim 3, characterized in that: The axial non-metallic continuous fiber tape (212) and the axial continuous steel wire fiber prepreg tape (214) have a tape width of 100-500 mm and a thickness of 0.3-1.2 mm.

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