Fiber reinforced composite material winding composite pipe with bamboo skin braided pipe as lining structure layer

Abstract

Relates to the technical field of composite material pipelines, in particular to a fiber reinforced composite material winding composite pipe with a bamboo skin woven pipe as a lining structure layer, which comprises a fiber reinforced composite material layer and a bamboo skin woven lining structure layer. The fiber reinforced composite material layer is formed by winding and coating the bamboo skin woven lining structure layer by multiple layers of fiber yarns or fiber cloth layer by layer, and the outer wall of the bamboo skin woven lining structure layer is coated with single-layer fiber yarns or fiber cloth at a designed winding angle; the bamboo skin woven lining structure layer is a three-dimensional tubular body, and the three-dimensional tubular body is formed by weaving bamboo skins; and gaps between the fiber yarns or between the fiber cloths and between the fiber yarns or the fiber cloths and the bamboo skin woven lining structure layer are filled and bonded through the infiltration resin adhesive, and the composite pipe is formed by curing and molding the fiber yarns or the fiber cloths and the bamboo skin woven lining structure layer with the infiltration resin adhesive. The composite pipe has better axial, lateral and circumferential tensile mechanical properties.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material pipes, in particular to a fiber-reinforced composite material wound composite pipe with a bamboo strip braided pipe as an inner lining structural layer. Background Art

[0002] As a recyclable and renewable biomass resource, bamboo has the advantages of a short growth cycle, strong carbon sequestration capacity, and good toughness, making it an ideal green and sustainable material. With the advancement of my country's "Bamboo Replaces Plastic" action plan, the utilization rate of bamboo and the rate of plastic substitution have continued to increase. Among them, bamboo-wrapped composite pipes are typical products of innovative applications of bamboo in China. As radially internal pressure-bearing pipes, bamboo-wrapped composite pipes have been widely used in municipal engineering, urban water supply and drainage, farmland irrigation projects and other fields. Bamboo-wrapped composite pipes are tubular structures formed by circumferential winding of bamboo filaments or bamboo sheets. They fully utilize the good tensile strength of bamboo. They have high radial internal pressure-bearing capacity, but weak axial and lateral tensile strength, and are limited in engineering application scenarios.

[0003] In order to expand the application field of composite pipes mainly made of bamboo, this patent application proposes a fiber-reinforced composite material wrapped composite pipe with a bamboo strip braided pipe as the inner lining structural layer. By interweaving circumferential bamboo strips and axial bamboo strips, winding and compounding the bamboo strip braided pipe and the fiber-reinforced composite material yarn / cloth, and adjusting the relevant parameters constituting the skeleton, the axial and lateral tensile strength of the composite pipe can be greatly improved, the damage evolution of the composite pipe along the circumferential direction can be inhibited, and the expansion of destructive cracks can be resisted; at the same time, the corrosion resistance and fatigue resistance of the composite pipe can be effectively improved, and it can be customized according to the specific engineering application performance requirements. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects and shortcomings of the prior art and to provide a fiber-reinforced composite material wound composite pipe with a bamboo strip braided pipe as an inner lining structural layer.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A fiber-reinforced composite material wound composite tube with a bamboo strip woven tube as an inner lining structural layer comprises a fiber-reinforced composite material layer and a bamboo strip woven inner lining structural layer; the fiber-reinforced composite material layer is formed by winding and covering the bamboo strip woven inner lining structural layer with multiple layers of fiber yarn or fiber cloth layer by layer, and a single layer of fiber yarn or fiber cloth is covered on the outer wall of the bamboo strip woven inner lining structural layer at a designed winding angle; the bamboo strip woven inner lining structural layer is a three-dimensional tubular body, which is woven from bamboo strips; gaps between fiber yarns and fiber yarns or between fiber cloths and fiber cloths, and between fiber yarns or fiber cloths and bamboo strip woven inner lining structural layers are filled and bonded by impregnating resin glue, and are cured and formed with the impregnated resin glue to form a composite tube.

[0007] As a preferred embodiment, the three-dimensional tubular body is woven into a bamboo strip braided tube with straight, twill or square hole pattern by using an interpenetrating braiding method of pressing one and picking one, pressing one and picking two, pressing two and picking one or pressing two and picking two.

[0008] As a preferred embodiment, the bamboo strips are sheets made by decomposing and processing bamboo materials, and then undergoing desugaring, defatting, antiseptic treatment, drying and surface activation treatment.

[0009] As a preference, the impregnation resin glue is a thermosetting resin glue or a thermoplastic resin glue.

[0010] As a preference, the fiber-reinforced composite material layer is made of any one of glass fiber, carbon fiber, aramid fiber, basalt fiber, steel fiber, and bamboo fiber.

[0011] A method for manufacturing a fiber-reinforced composite material wound composite pipe with a bamboo strip braided pipe as an inner lining structural layer comprises the following steps:

[0012] S1. Design the length and cross-sectional shape of the composite tube according to the functional requirements of the composite tube, determine the thickness of the fiber-reinforced composite material layer, the winding angle and number of layers of the fiber yarn or fiber cloth, the wall thickness of the bamboo strip braided tube, the cross-sectional content of the bamboo strips, the interpenetrating braiding method of the bamboo strip braided tube, and the type of impregnation resin glue;

[0013] S2, decomposing the bamboo into bamboo strips, and performing desugaring, degreasing, antiseptic, drying and surface activation treatments on the bamboo strips;

[0014] S3, weaving the bamboo strips into a bamboo strip braided tube;

[0015] S4, placing the bamboo strips braided tube on a winding machine, winding the fiber yarn or fiber cloth layer by layer according to the designed winding angle, and applying impregnation resin glue on the outer wall of the bamboo strips braided tube before winding the outer fiber yarn or fiber cloth;

[0016] S5. After the impregnation resin glue is fully impregnated and cured into a shape, a composite tube is formed.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. The utility model uses a bamboo woven tube as the inner lining structure layer, and forms a composite tube by winding multiple layers of fiber yarn or fiber cloth around the bamboo woven tube, thereby enhancing the overall bearing capacity, rigidity and durability of the composite tube. It is low-carbon and environmentally friendly, has low manufacturing cost, and has good axial, lateral and circumferential tensile mechanical properties. The fiber yarn or fiber cloth and the bamboo woven inner lining structure layer are filled and bonded by impregnation with resin glue, thereby ensuring a close connection between the inner lining structure layer and the reinforcement layer to avoid delamination and falling off.

[0019] 2. The bamboo strips braided tube of the utility model adopts an interpenetrating braiding method of pressing one and picking one, pressing one and picking two, pressing two and picking one, or pressing two and picking two, and can be woven into a straight or twill bamboo strips braided tube, providing excellent tensile and bending mechanical properties and appearance characteristics for the composite tube, so that the composite tube can adapt to different usage environments and functional requirements, and will be an important technical product for the industrial utilization of bamboo.

[0020] 3. The utility model has opened up a new way to apply bamboo materials. It adopts a bidirectional stress-defect-free interpenetrating weaving process to manufacture bamboo-based composite pipes, which can be used in many engineering structure fields and can replace engineering structure pipes made of traditional materials such as steel, cement, plastic, and non-ferrous metals on a large scale. It can play a huge role in resource conservation, environmental protection and sustainable development, and respond to the global initiative of "replacing plastic with bamboo".

[0021] 4. The bamboo strips of the present invention have been treated with desugaring, degreasing, anti-corrosion, drying and surface activation, which effectively improves the corrosion resistance, insect resistance and environmental adaptability of the bamboo strips and extends the service life of the composite pipe.

[0022] 5. The use of impregnation resin glue in the present invention can significantly improve the rigidity, bearing capacity, corrosion resistance and anti-aging ability of the composite pipe, thereby extending the service life of the composite pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the composite pipe;

[0024] Figure 2 It is a top view of the composite pipe with a circular cross section;

[0025] Figure 3 It is a top view of the composite tube with a decagonal cross section;

[0026] Figure 4 This is a schematic diagram of the structure of a twill bamboo strip braided tube with an interpenetrating braiding method of two-by-two pressing;

[0027] Figure 5 This is a schematic diagram of the structure of a straight-grain bamboo strip braided tube with an interpenetrating braiding method of one-on-one pressing;

[0028] Figure 6 This is a schematic diagram of the structure of a straight-grain bamboo strip braided tube with an interpenetrating braiding method of one-to-one horizontal pressing and two-to-one vertical pressing;

[0029] Figure 7 This is a schematic diagram of the structure of a bamboo strip braided tube with a four-corner hole pattern and an interpenetrating braiding method of pressing one and picking one;

[0030] Among them: 1: fiber reinforced composite material layer, 2: bamboo strips woven lining structure layer. DETAILED DESCRIPTION

[0031] The present invention will be described in further detail below with reference to the embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0032] like Figure 1 As shown, a bamboo strip woven tube is a fiber-reinforced composite material wrapped composite tube with an inner lining structural layer, comprising a fiber-reinforced composite material layer and a bamboo strip woven inner lining structural layer; the fiber-reinforced composite material layer is formed by winding and covering the bamboo strip woven inner lining structural layer with multiple layers of fiber yarn or fiber cloth layer by layer, and a single layer of fiber yarn or fiber cloth is covered on the outer wall of the bamboo strip woven inner lining structural layer at a designed winding angle; the bamboo strip woven inner lining structural layer is a three-dimensional tubular body, which is woven from bamboo strips; the gaps between the fiber yarns and the fiber yarns or between the fiber cloths and the fiber yarns or the fiber cloths and the bamboo strip woven inner lining structural layer are filled and bonded by impregnating resin glue, and are cured and formed with the impregnated resin glue to form a composite tube.

[0033] In this embodiment, if Figure 2 As shown, the cross section of the composite tube is circular; the fiber reinforced composite material layer is fiber yarn made of glass fiber composite material, and the thickness of the fiber reinforced composite material layer is 2 to 4 mm; Figure 4 As shown, the three-dimensional tubular body is woven into a twill bamboo strip braided tube by using a two-by-two interpenetrating braiding method; the bamboo strips are processed by decomposing bamboo materials and then subjected to desugaring, degreasing, antiseptic, drying and surface activation treatments to form sheets; the thickness of the bamboo strips is 4 to 8 mm and the width is 10 to 20 mm; the diameter of the bamboo strip braided tube is 250 to 500 mm; the impregnation resin glue is a thermosetting resin glue.

[0034] A method for manufacturing a fiber-reinforced composite material wound composite pipe with a bamboo strip braided pipe as an inner lining structural layer comprises the following steps:

[0035] S1. Design the length and cross-sectional shape of the composite tube according to the functional requirements of the composite tube, determine the thickness of the fiber-reinforced composite material layer, the winding angle and number of layers of the fiber yarn or fiber cloth, the wall thickness of the bamboo strip braided tube, the cross-sectional content of the bamboo strips, the interpenetrating braiding method of the bamboo strip braided tube, and the type of impregnation resin glue;

[0036] S2, decomposing the bamboo into bamboo strips, and performing desugaring, degreasing, antiseptic, drying and surface activation treatments on the bamboo strips;

[0037] S3, weaving the bamboo strips into a bamboo strip braided tube;

[0038] S4, placing the bamboo strips braided tube on a winding machine, winding the fiber yarn or fiber cloth layer by layer according to the designed winding angle, and applying impregnation resin glue on the outer wall of the bamboo strips braided tube before winding the outer fiber yarn or fiber cloth;

[0039] S5. After the impregnation resin glue is fully impregnated and cured into a shape, a composite tube is formed.

[0040] In addition to the above-mentioned embodiments, Figure 3 As shown, the cross section of the composite tube can also be a decagon; Figures 5 to 7 As shown, the three-dimensional tubular body can also be woven using any one of the interpenetrating braiding methods of pressing one and one, pressing one and two, or pressing two and one; or the three-dimensional tubular body can also be woven using any two of the interpenetrating braiding methods of pressing one and one, pressing one and two, pressing two and one, or pressing two and two; the bamboo strip braided tube can also be woven into a square hole pattern; the impregnating resin glue can also be a thermosetting resin; and the fiber-reinforced composite material layer can also be made of any fiber material selected from carbon fiber, aramid fiber, basalt fiber, polyester fiber, steel fiber, and bamboo fiber. All of these variations are within the scope of protection of the present utility model.

[0041] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fiber-reinforced composite material wound composite pipe with a bamboo strip braided pipe as the inner lining structural layer, characterized by: It includes a fiber reinforced composite material layer and a bamboo strip woven lining structure layer; The fiber-reinforced composite material layer is wrapped around the outer wall of the bamboo strip woven lining structure layer by winding multiple layers of fiber yarn or fiber cloth layer by layer, and the single layer of fiber yarn or fiber cloth is arranged at a designed winding angle; The bamboo strips woven lining structure layer is a three-dimensional tubular body woven from bamboo strips; Impregnation resin glue is filled between the fiber yarns or between the fiber cloths, and between the fiber yarns or the fiber cloths and the bamboo strips woven lining structure layer.

2. The bamboo strips braided tube according to claim 1 is a fiber-reinforced composite material wound composite tube with an inner lining structural layer, characterized in that: The weaving pattern of the three-dimensional tubular body is a straight pattern, a twill pattern or a square hole pattern.

3. The bamboo strips braided tube according to claim 1 is a fiber-reinforced composite material wound composite tube with an inner lining structural layer, characterized in that: Bamboo strips are bamboo sheets with the properties of desugaring, degreasing, antiseptic, drying and surface activation.

4. The bamboo strips braided tube according to claim 1 is a fiber-reinforced composite material wound composite tube with an inner lining structural layer, characterized in that: The impregnation resin glue is a thermosetting resin glue or a thermoplastic resin glue.

5. The bamboo strips braided tube according to claim 1 is a fiber-reinforced composite material wound composite tube with an inner lining structural layer, characterized in that: The fiber-reinforced composite material layer is made of any one of glass fiber, carbon fiber, aramid fiber, basalt fiber, steel fiber and bamboo fiber.

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