Composite pipe
By employing a multi-layered, staggered carbon fiber layer design in the composite pipe, the problem of poor fracture toughness of carbon fiber is solved, thereby improving the load-bearing capacity of the composite pipe.
Patent Information
- Application Number
- CN202422997570.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing composite pipes suffer from poor fracture toughness of carbon fiber, resulting in insufficient transverse shear performance and circumferential strength, making it difficult to improve load-bearing capacity.
The design employs a multi-layered carbon fiber structure, including vertically, parallelly, and angled carbon fiber layers stacked together to form an interlaced structure, thereby enhancing the load-bearing capacity of the composite pipe.
This improves the composite pipe's ability to withstand external stresses in multiple directions and dimensions, thereby enhancing its overall load-bearing capacity.
Smart Images
Figure CN223460045U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of composite pipe, specifically relates to a composite pipe. BACKGROUND
[0002] The composite pipe prepared by taking the new generation of carbon materials such as carbon fiber as main components and having light weight and high mechanical properties has the comprehensive advantages of light weight, high strength and corrosion resistance, and is very suitable for the fields of aerospace, automobile and sports supplies. However, the light weight materials represented by carbon fiber generally have the problem of poor fracture toughness, so that the transverse shear performance and hoop strength of the prepared composite pipe are insufficient, and the load bearing performance of the product cannot be further improved. SUMMARY
[0003] Based on the defects of the prior art, the utility model aims to provide a composite pipe, through the lamination design and the laying angle design of the carbon fibers in the composite layers in the composite pipe, the interlayer force of the product can be guaranteed to be small, the overall structure can effectively bear the external stress in multiple directions and dimensions, and the composite pipe can be applied in the field with high load bearing requirements.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:
[0005] A composite pipe comprises a base layer, a structure layer and an appearance layer from inside to outside.
[0006] The structure layer is obtained by alternately laminating a first structure layer adjacent to the base layer, a second structure layer and a third structure layer, each structure layer comprises carbon fibers, the carbon fibers are unidirectionally and continuously distributed, the number of layers of the second structure layer and the third structure layer in the structure layer is n, and n is greater than or equal to 2.
[0007] The carbon fibers in the first structure layer are perpendicular to the height direction of the composite pipe.
[0008] The carbon fibers in the second structure layer are parallel to the height direction of the composite pipe.
[0009] The angle between the carbon fibers in the third structure layer and the height direction of the composite pipe is +45° or -45°.
[0010] Preferably, the carbon fibers in the first structure layer are perpendicular to the height direction of the composite pipe, and the perpendicular direction is the circular arc circumferential direction of the composite pipe.
[0011] The utility model discloses a composite pipe material is provided with the superposition structure layer of containing multiple distribution direction's carbon fiber as main function structure in, with vertical distribution's carbon fiber as product provides annular compression load, with horizontal distribution's carbon fiber as product provides axial bending load, with the carbon fiber of included angle distribution as product provides anti -twist load, and the force of staggered superposition mode can make product interlayer, and the overall structure has stronger bearing capacity to the stress of including multiple direction dimensions such as horizontal direction, axial direction, and comprehensive bearing performance is excellent.
[0012] Preferably, the thickness of the n layers of second structure layers is the same.
[0013] Preferably, the thickness of the n layers of third structure layers is the same.
[0014] Preferably, the third structure layer comprises a fourth structure layer and a fifth structure layer connected in sequence, and the carbon fibers in the fourth structure layer and the fifth structure layer are vertically distributed or parallelly distributed.
[0015] More preferably, the thickness of any two fourth structure layers in the n layers of third structure layers is the same.
[0016] More preferably, the thickness of any two fifth structure layers in the n layers of third structure layers is the same.
[0017] Preferably, the structure layer further comprises a matrix resin, and the mass ratio of the matrix resin to the carbon fibers in the carbon fiber layer is (4:6) to (2.5:7.5).
[0018] In some embodiments, the thickness of the first structure layer is 0.15 to 0.9 mm, the thickness of the second structure layer is 0.15 to 0.9 mm, and the thickness of the third structure layer is 0.15 to 0.72 mm.
[0019] Preferably, the number of filaments of the carbon fibers in at least one of the first structure layer, the second structure layer and the third structure layer is 10 to 15k.
[0020] Based on the conditions of processing equipment and the needs of product application, a person skilled in the art can select carbon fibers with different tow densities, and the use of the above-mentioned preferred type has higher applicability to processing and application scenarios.
[0021] Preferably, the base layer comprises glass fibers and a matrix resin.
[0022] More preferably, the base layer is a glass fiber woven cloth.
[0023] Preferably, the thickness of the base layer is 0.01 to 0.1 mm.
[0024] Preferably, the appearance layer comprises carbon fibers and a matrix resin.
[0025] More preferably, the appearance layer is a plain / corduroy cloth.
[0026] Preferably, the thickness of the appearance layer is 0.1-0.3mm.
[0027] More preferably, the base resin is an epoxy resin with a melting point of 100-130℃.
[0028] Preferably, when n=2, the carbon fiber layer in the composite pipe material comprises a first structural layer, a second structural layer 1, a third structural layer 1, a second structural layer 2 and a third structural layer 2 in sequence.
[0029] The third structural layer comprises a fourth structural layer and a fifth structural layer connected in sequence.
[0030] The carbon fiber in the first structural layer is at an angle of 90° with the height direction of the composite pipe material.
[0031] The carbon fiber in the second structural layer is at an angle of 0° with the height direction of the composite pipe material.
[0032] The carbon fiber in the fourth structural layer is at an angle of +45° or -45° with the height direction of the composite pipe material.
[0033] The carbon fiber in the fifth structural layer is perpendicular to the carbon fiber in the fourth structural layer.
[0034] The composite pipe material has the advantages that the carbon fiber in the composite layer is designed in a laminated and laid design and a laying angle design, so that the product can have a small interlayer force, the overall structure can effectively withstand external stress in multiple directions and dimensions, and can be applied in high bearing requirement fields. BRIEF DESCRIPTION OF DRAWINGS
[0035] Figure 1 It is an expanded view of the structural layer of the composite pipe material.
[0036] Figure 2 It is a perspective view of the composite pipe material. DETAILED DESCRIPTION
[0037] In order to better illustrate the purpose, technical scheme and advantages of the utility model, the utility model will be further described below in combination with specific examples and comparative examples, the purpose of which is to understand the content of the utility model in detail, rather than limit the utility model. All other examples obtained by ordinary skilled persons in the art without creative labor belong to the protection scope of the utility model. The experimental materials and instruments involved in the implementation of the utility model are common ordinary materials and instruments unless otherwise specified.
[0038] Embodiment 1
[0039] The composite pipe material is obtained by combining multiple layers of composite layers containing base resin and glass fiber or carbon fiber:
[0040] According to the design requirements of the composite pipe material, the following expected layers containing base resin and glass fiber or carbon fiber are cut in size and thickness, and then each expected layer is combined and rolled into a mold to make each layer closely adhere, and then a wrapping machine is used to wrap the rough pipe blank obtained by rolling with a BOPP (biaxially oriented polypropylene film) belt, and then sent into a high temperature furnace for curing at 70-160 DEG C for 85-125 min, polishing, cleaning, and painting to obtain the composite pipe material.
[0041] The composite pipe material comprises a base layer, a structural layer and an appearance layer from inside to outside, the structural layer is a carbon fiber layer, and the carbon fiber layer comprises first structural layer (90°), second structural layer 1 (0°), third structural layer 1 (± 45°), second structural layer 2 (0°) and third structural layer 2 (± 45°) in sequence.
[0042] The development view of the structural layer is as shown in Figure 1 The perspective view of the composite pipe material is as shown in Figure 2 .
[0043] The base layer adopts FAW50 type glass fiber cloth produced by Texas United Top, which comprises 35wt% base resin epoxy resin and 65wt% glass fiber;
[0044] The first structural layer adopts two layers of FAW150-T300UD unidirectional carbon fiber cloth produced by Texas United Top, which is obtained by stacking and pressing according to the same carbon fiber direction, and comprises 33wt% base resin epoxy resin and 67wt% 12k filament carbon fiber; the distribution direction of the carbon fiber in the structural layer is 90° with the length direction of the composite pipe material, and is tangent to the arc direction of the composite pipe material;
[0045] The second structural layer adopts FAW360-T300UD unidirectional carbon fiber cloth produced by Texas United Top, which is obtained by stacking and pressing according to the same carbon fiber direction, and comprises 30wt% base resin epoxy resin and 70wt% 12k filament carbon fiber; the distribution direction of the carbon fiber in the structural layer is 0° with the length direction of the composite pipe material;
[0046] The third structural layer is obtained by laminating two layers of FAW150-T300UD unidirectional carbon fiber cloth produced by Texas Joint Topu, and includes 33wt% matrix resin epoxy resin and 67wt% 12k tows of carbon fiber; the two layers of unidirectional carbon fiber cloth are named as the fourth structural layer and the fifth structural layer, and the distribution directions of the carbon fibers in the two layers are 45° and -45° with respect to the length direction of the composite pipe respectively;
[0047] The appearance layer adopts FAW200-3K plain weave cloth produced by Texas Joint Topu, and includes 42wt% matrix resin epoxy resin and 58wt% 3k tows of carbon fiber.
[0048] The inner wall diameter of the composite pipe is 50mm;
[0049] The thickness of the base layer is 0.05mm, the thickness of the first structural layer is 0.3mm, the thickness of each of the second structural layers 1 and 2 is 0.36mm, the thickness of the fourth structural layer in each of the third structural layers 1 and 2 is 0.15mm, and the thickness of the fifth structural layer is 0.15mm.
[0050] The composite pipe is subjected to three-point bending load test: a special three-point bending jig is used, and a universal testing machine is used for testing at a rate of 20mm / min; after the carbon pipe is damaged, the maximum damage load is recorded, and the test result reaches 9400N; 50mm flat plate compression load test is carried out: a universal testing machine is used for horizontal compression test on the carbon pipe with a length of 50mm, at a rate of 10mm / min; after the carbon pipe is damaged, the maximum damage load is recorded, and the test result reaches 1800N; port ring extrusion load test is carried out: a special port ring extrusion test jig is used, and a universal testing machine is used for testing at a rate of 20mm / min; after the carbon pipe is damaged, the maximum damage load is recorded, and the test result reaches 11000N.
[0051] Embodiment 2
[0052] An embodiment of the composite pipe disclosed in the utility model differs from embodiment 1 only in that the composite pipe comprises a base layer, a first structural layer, a second structural layer 1, a third structural layer 1, a second structural layer 2, a third structural layer 2, a second structural layer 3, a third structural layer 3 and an appearance layer from inside to outside; the composition and thickness of the second structural layer 3 are the same as those of the second structural layer 1 and the second structural layer 2, and the composition and thickness of the third structural layer 3 are the same as those of the third structural layer 1 and the third structural layer 2.
[0053] Embodiment 3
[0054] The embodiment of the composite pipe material differs from the embodiment 1 only in that the composite pipe material comprises from inside to outside a base layer, a first structural layer, a second structural layer 1, a third structural layer 1, a second structural layer 2, a third structural layer 2, a second structural layer 3, a third structural layer 3, a second structural layer 4, a third structural layer 4 and an appearance layer; the composition and thickness of the second structural layer 3 and the second structural layer 4 are the same as those of the second structural layer 1 and the second structural layer 2, and the composition and thickness of the third structural layer 3 and the third structural layer 4 are the same as those of the third structural layer 1 and the third structural layer 2.
[0055] Finally, it should be explained that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit the protection scope of the utility model, and although the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the essence and scope of the technical solutions of the utility model.
Claims
1. A composite pipe, characterized by, The composite pipe comprises a base layer, a structure layer and an appearance layer from inside to outside; The structure layer is obtained by alternately stacking a first structure layer adjacent to the base layer, and a second structure layer and a third structure layer in sequence; each structure layer comprises carbon fibers, the carbon fibers are unidirectionally and continuously distributed, the number of the second structure layer and the third structure layer in the structure layer is n, and n≥2; The carbon fibers in the first structure layer are perpendicular to the height direction of the composite pipe; The carbon fibers in the second structure layer are parallel to the height direction of the composite pipe; The carbon fibers in the third structure layer form an angle of +45° or -45° with the height direction of the composite pipe.
2. The composite pipe of claim 1, wherein The third structure layer comprises a fourth structure layer and a fifth structure layer connected in sequence, and the carbon fibers in the fourth structure layer and the fifth structure layer are vertically or horizontally distributed.
3. The composite pipe of claim 1, wherein The structure layer further comprises a matrix resin.
4. The composite pipe of claim 1, wherein The base layer comprises glass fibers and a matrix resin, and / or the appearance layer comprises carbon fibers and a matrix resin.
5. The composite pipe of claim 1, wherein When n=2, the structure layer in the composite pipe comprises a first structure layer, a second structure layer 1, a third structure layer 1, a second structure layer 2 and a third structure layer 2 in sequence. The third structure layer comprises a fourth structure layer and a fifth structure layer connected in sequence. The carbon fibers in the first structure layer form an angle of 90° with the height direction of the composite pipe. The carbon fibers in the second structure layer form an angle of 0° with the height direction of the composite pipe. The carbon fibers in the fourth structure layer form an angle of +45° or -45° with the height direction of the composite pipe. The carbon fibers in the fifth structure layer are vertically distributed with the carbon fibers in the fourth structure layer.
6. The composite pipe of claim 1, wherein The thickness of any two fourth structure layers in the n third structure layers is the same, and / or the thickness of any two fifth structure layers in the n third structure layers is the same.
7. The composite pipe of claim 1, wherein The base layer is a glass fiber woven cloth, and / or the appearance layer is a plain weave / cross weave cloth.
8. The composite pipe of claim 1, wherein The base layer is a FAW50 type glass fiber woven cloth, and / or the first structure layer comprises a FAW150-T300UD unidirectional carbon fiber cloth, the second structure layer comprises a FAW360-T300UD unidirectional carbon fiber cloth, the third structure layer comprises a FAW150-T300UD unidirectional carbon fiber cloth, and / or the appearance layer is a FAW200-3K plain weave woven cloth.