High-strength pultrusion woven carbon fiber tube

Abstract

The utility model discloses a high-strength pultrusion woven carbon fiber tube, and relates to the technical field of carbon fiber tubes. The high-strength pultrusion woven carbon fiber tube comprises a conveying connecting layer, a plurality of buffer layers are arranged on the outer surface of the conveying connecting layer, a structure supporting layer is arranged on the outer surfaces of the buffer layers, a pressure-resistant protective layer is arranged on the outer surface of the structure supporting layer, and an outer protective reinforcing layer is arranged on the outer surface of the pressure-resistant protective layer. A plurality of supporting rods are evenly distributed in the outer protection reinforcing layer, the conveying connecting layer, the buffer layer, the structure supporting layer, the compression-resistant protective layer and the outer protection reinforcing layer are arranged, all the layers have a synergistic effect, the compression resistance, impact resistance and torsion resistance of the pipe are improved, and the pipe can be fixed to the connecting grooves through the pressure dividing strips and the connecting mortises; the internal layers are connected more tightly, pressure transmission and dispersion are more uniform, the connection strength between the layers is improved, and the situations of falling off and layering fracture in different use scenes are reduced.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber tube technology, specifically a high-strength pultruded braided carbon fiber tube. Background Technology

[0002] Carbon fiber tubes, also known as carbon fiber tubes, are tubular products made of carbon fiber composite materials. Pultruded braided carbon fiber tubes are a type of carbon fiber reinforced composite material tube that combines pultrusion molding and braiding processes. They have wide applications in many fields, can withstand large axial tensile and compressive forces, are not easily deformed, have good corrosion resistance, and can resist the erosion of chemicals such as acids, alkalis, and salts. They can be used for a long time in harsh environments.

[0003] The existing technology has the following problems:

[0004] Existing pultruded braided carbon fiber tubes face certain bottlenecks in improving strength and performance when dealing with complex mechanical environments. The single internal structure is difficult to meet the stringent requirements of fields such as aerospace and high-end sports equipment for tubes in terms of pressure resistance, impact resistance, and torsion resistance. Furthermore, existing multi-material carbon fiber tubes use an adhesive bonding process between each layer, which can easily lead to detachment and delamination in different application scenarios, resulting in lower strength and poor practicality. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a high-strength pultruded braided carbon fiber tube, which solves the problem of delamination damage.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a high-strength pultruded braided carbon fiber tube includes a conveying connection layer, a plurality of buffer layers are provided on the outer surface of the conveying connection layer, a structural support layer is provided on the outer surface of the buffer layer, a pressure-resistant protective layer is provided on the outer surface of the structural support layer, an outer protective reinforcement layer is provided on the outer surface of the pressure-resistant protective layer, and a plurality of support rods are uniformly distributed inside the outer protective reinforcement layer, with the plurality of support rods arranged in a circular array with the center of the outer protective reinforcement layer.

[0007] Preferably, the buffer layer includes a buffer strip, which is trapezoidal, and a pressure dispersion groove is provided at the end of the buffer strip that does not contact the conveying connection layer. The buffer layer is made of carbon fiber chopped strand mat reinforced silicone rubber.

[0008] Preferably, the structural support layer includes a main support layer, the inner side of which is provided with a plurality of connecting grooves, and the inner wall of the main support layer is fixedly connected with a plurality of reinforcing ribs. The number of reinforcing ribs is the same as that of the connecting grooves and the buffer layer. The plurality of reinforcing ribs are located between two adjacent connecting grooves. The reinforcing ribs are triangular. The outer surfaces of the plurality of reinforcing ribs are fixedly connected to the inner sides of a plurality of pressure dispersion grooves. The structural support layer is made of carbon fiber reinforced epoxy resin-based composite material.

[0009] Preferably, the conveying connection layer includes a conveying inner tube, and a plurality of pressure-dividing strips are fixedly connected to the outer surface of the conveying inner tube. The number of pressure-dividing strips is the same as that of the buffer strips. The outer surfaces of the plurality of buffer strips are respectively fixedly connected between two adjacent pressure-dividing strips. An inverted trapezoidal connecting head is fixedly connected to the end of the pressure-dividing strip away from the conveying inner tube. The outer surfaces of the plurality of connecting heads are respectively fixedly connected to the inner side of the nearest connecting groove. The conveying connection layer is made of carbon fiber reinforced polytetrafluoroethylene composite material.

[0010] Preferably, the outer protective reinforcement layer is made of carbon fiber fabric reinforced vinyl ester resin.

[0011] Preferably, the support rod is made of carbon fiber reinforced plastic and is manufactured by continuous carbon fiber pultrusion molding.

[0012] Preferably, the pressure-resistant protective layer has a honeycomb structure, and the material of the pressure-resistant protective layer is phenolic resin-based glass fiber material.

[0013] This invention provides multi-layered protection. Compared with the prior art, it has the following advantages:

[0014] 1. This high-strength pultruded braided carbon fiber pipe features a conveying connection layer, a buffer layer, a structural support layer, a pressure-resistant protective layer, and an outer reinforcing layer. These layers work synergistically. The reinforcing ribs and connecting grooves in the structural support layer, combined with the pressure-dispersing grooves in the buffer layer, effectively disperse pressure and enhance compressive strength. The outer reinforcing layer, in conjunction with internal support rods, improves torsional resistance, better meeting the stringent requirements for pressure resistance, impact resistance, and torsion resistance in fields such as aerospace and high-end sports equipment.

[0015] 2. This high-strength pultruded braided carbon fiber pipe is fixed to the structural support layer by the pressure strips of the conveying connection layer and the connecting mortise and tenon, and the buffer layer is tightly connected to both, so that the connection between the internal layers is tighter and the pressure transmission is more evenly distributed, which greatly improves the connection strength between the layers, reduces the occurrence of detachment and delamination in different usage scenarios, and improves the overall strength and practicality of the pipe. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the external structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the structural support layer of this utility model.

[0020] Figure 5 This is a schematic diagram of the conveying connection layer structure of this utility model.

[0021] In the diagram: 1. Outer protective reinforcement layer; 2. Pressure-resistant protective layer; 3. Structural support layer; 31. Reinforcing rib; 32. Main support layer; 33. Connecting groove; 4. Buffer layer; 41. Buffer strip; 42. Pressure dispersion groove; 5. Conveying connection layer; 51. Pressure dividing strip; 52. Conveying inner pipe; 53. Connecting mortise; 6. Support rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: a high-strength pultruded braided carbon fiber tube, including a conveying connection layer 5, a plurality of buffer layers 4 on the outer surface of the conveying connection layer 5, a structural support layer 3 on the outer surface of the buffer layer 4, a pressure-resistant protective layer 2 on the outer surface of the structural support layer 3, an outer protective reinforcement layer 1 on the outer surface of the pressure-resistant protective layer 2, a plurality of support rods 6 evenly distributed inside the outer protective reinforcement layer 1, and the plurality of support rods 6 forming a circular array with the center of the outer protective reinforcement layer 1.

[0024] In actual operation, the conveying connection layer 5 serves as the inner layer. When conveying media, the flow of the media inside it generates pressure, which is transmitted to the outer structure. The buffer layer 4 is distributed on the outer surface of the conveying connection layer 5, which can buffer the pressure transmitted from the conveying connection layer 5 and reduce the impact on the subsequent structure. The structural support layer 3 is located outside the buffer layer 4, providing the main structural support for the entire pipeline and maintaining the shape and stability of the pipeline. The pressure-resistant protective layer 2 is outside the structural support layer 3, which uses its own structural characteristics to resist external pressure and protect the internal structure. The outer protective reinforcement layer 1 is located on the outermost layer, which can not only further enhance the overall strength of the pipeline, but also prevent the external environment from corroding the internal structure. The support rods 6 distributed in a circular array inside the outer protective reinforcement layer 1 work together with the outer protective reinforcement layer 1 to enhance the torsional performance of the pipeline, making the pipeline less prone to deformation when subjected to torsional forces.

[0025] Please see Figure 2 The outer protective reinforcement layer 1 is made of carbon fiber fabric reinforced vinyl ester resin. Vinyl ester resin has good corrosion resistance and mechanical properties. When combined with carbon fiber fabric, the resulting outer layer has high strength and good toughness, which can effectively protect the internal structure and play a role in covering and fixing the support rod 6.

[0026] Please see Figure 2 The support rod 6 is made of carbon fiber reinforced plastic and is manufactured by continuous carbon fiber pultrusion molding. The carbon fibers are highly oriented along the axial direction, which gives the support rod 6 extremely high axial strength and rigidity. It can provide stable axial support for the pipeline and enhance the overall deformation resistance of the pipeline.

[0027] Please see Figure 2 The pressure-resistant protective layer 2 has a honeycomb structure and is made of phenolic resin-based glass fiber material, which is lightweight and high-strength. The honeycomb structure provides good pressure resistance and can effectively disperse external pressure; it has good thermal insulation performance and can play a certain role in thermal protection; the good flame retardancy of phenolic resin increases safety.

[0028] Please see Figure 3 The buffer layer 4 includes a buffer strip 41, which is trapezoidal. A pressure dispersion groove 42 is provided at one end of the buffer strip 41 that does not contact the conveying connection layer 5. The buffer layer 4 is made of carbon fiber chopped strand mat reinforced silicone rubber. The trapezoidal structure of the buffer strip 41 allows it to disperse force more effectively when in contact with external force. The pressure dispersion groove 42 can increase the contact area with the structural support layer 3 and better transmit the force to the interior of the structural support layer 3.

[0029] The elasticity of silicone rubber allows the buffer strip 41 to deform to a certain extent, thereby buffering the pressure. The carbon fiber chopped strand mat enhances its overall strength, preventing the buffer strip 41 from tearing or being damaged during the stress process, and ensuring that the buffer layer 4 can stably play its buffering role.

[0030] Please see Figure 3-4 The structural support layer 3 includes a main support layer 32. Several connecting grooves 33 are provided on the inner side of the main support layer 32. Several reinforcing ribs 31 are fixedly connected to the inner wall of the main support layer 32. The number of reinforcing ribs 31 is the same as that of the connecting grooves 33 and the buffer layer 4. Several reinforcing ribs 31 are located in the middle of two adjacent connecting grooves 33. The reinforcing ribs 31 are triangular. The outer surfaces of several reinforcing ribs 31 are fixedly connected to the inner side of several pressure dispersion grooves 42. The structural support layer 3 is made of carbon fiber reinforced epoxy resin-based composite material.

[0031] The main support layer 32 provides the basic load-bearing capacity for the whole. The connecting groove 33 cooperates with the connecting mortise 53 of the conveying connecting layer 5 to achieve a stable connection between the layers and ensure that each layer works together. When the pipeline is subjected to external force, the reinforcing ribs 31 use the stable triangular structure to further disperse the pressure and impact force transmitted from the buffer layer 4 to the entire main support layer 32. These reinforcing ribs 31 enhance the rigidity and strength of the structural support layer 3 and effectively improve the pipeline's ability to resist deformation and damage.

[0032] Epoxy resin has good wettability and high bonding strength to carbon fiber. This composite material has the characteristics of high strength and high modulus, which can provide reliable structural support for pipelines. At the same time, its good processability makes it easy to rivet with the first layer.

[0033] Please see Figure 3-5 The conveying connection layer 5 includes an inner conveying tube 52. Several pressure-distributing strips 51 are fixedly connected to the outer surface of the inner conveying tube 52. The number of pressure-distributing strips 51 is the same as that of the buffer strips 41. The outer surfaces of the several buffer strips 41 are fixedly connected between two adjacent pressure-distributing strips 51. An inverted trapezoidal connecting head 53 is fixedly connected to the end of the pressure-distributing strip 51 away from the inner conveying tube 52. The outer surfaces of the several connecting heads 53 are fixedly connected to the inner side of the nearest connecting groove 33. The material of the conveying connection layer 5 is carbon fiber reinforced polytetrafluoroethylene composite material.

[0034] The conveying connection layer 5 plays an important role in conveying the medium and connecting other structures. The inner conveying tube 52 is responsible for conveying the medium and providing internal pressure distribution. When the medium flows in the inner conveying tube 52 and generates pressure, this pressure is transmitted to the pressure-distributing strip 51. The pressure-distributing strip 51 distributes the pressure to the buffer strip 41, which further buffers the pressure. At the same time, the pressure-distributing strip 51 is tightly fixed to the connecting groove 33 of the structural support layer 3 through the inverted trapezoidal connecting mortise 53, and also distributes the pressure to the structural support layer 3 when distributing it to the buffer strip 41.

[0035] Polytetrafluoroethylene (PTFE) has a low coefficient of friction and good chemical stability, which ensures smooth flow of the internal medium without corrosion. The addition of carbon fiber reinforcement improves the material's strength and rigidity, allowing it to better bond with the third layer while maintaining the smoothness of the inner wall.

[0036] Please see Figure 1-5 At work,

[0037] First, ensure that the inner conveying pipe 52 of the conveying connection layer 5 is correctly connected to the external medium conveying system to ensure that the medium can flow in and out smoothly. Utilize the properties of polytetrafluoroethylene to ensure smooth medium conveying without corrosion. The pressure generated by the medium flowing in the inner conveying pipe 52 will be transmitted to the pressure-distributing strip 51, and then dispersed to the buffer strip 41 of the buffer layer 4. The buffer strip 41 buffers the pressure through its own deformation and the pressure dispersion groove 42, protecting the internal structure. The buffered pressure is transmitted to the structural support layer 3, the main support layer 32 bears the pressure, and the reinforcing rib 31 uses a triangular structure to further disperse the pressure and enhance the rigidity of the pipeline. The pressure-resistant protective layer 2 resists external pressure, the outer protective reinforcement layer 1 prevents external environmental corrosion, and the internal support rod 6 enhances the anti-torsion performance to ensure the stable operation of the pipeline under complex working conditions.

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength pultruded braided carbon fiber tube, comprising a conveying connecting layer (5), characterized in that: The outer surface of the conveying connection layer (5) is provided with several buffer layers (4), the outer surface of the buffer layer (4) is provided with a structural support layer (3), the outer surface of the structural support layer (3) is provided with a pressure-resistant protective layer (2), the outer surface of the pressure-resistant protective layer (2) is provided with an outer protective reinforcement layer (1), and several support rods (6) are evenly distributed inside the outer protective reinforcement layer (1), and the several support rods (6) are arranged in a circular array with the center of the outer protective reinforcement layer (1).

2. The high-strength pultruded braided carbon fiber tube according to claim 1, characterized in that: The buffer layer (4) includes a buffer strip (41), which is trapezoidal. A pressure dispersion groove (42) is provided at one end of the buffer strip (41) that does not contact the conveying connection layer (5). The material of the buffer layer (4) is carbon fiber chopped strand mat reinforced silicone rubber.

3. A high-strength pultruded braided carbon fiber tube according to claim 2, characterized in that: The structural support layer (3) includes a main support layer (32). The main support layer (32) has several connecting grooves (33) on its inner side. The inner wall of the main support layer (32) is fixedly connected to several reinforcing ribs (31). The number of reinforcing ribs (31) is the same as that of the connecting grooves (33) and the buffer layer (4). Several reinforcing ribs (31) are located in the middle of two adjacent connecting grooves (33). The reinforcing ribs (31) are triangular. The outer surfaces of several reinforcing ribs (31) are fixedly connected to the inner side of several pressure dispersion grooves (42). The structural support layer (3) is made of carbon fiber reinforced epoxy resin composite material.

4. A high-strength pultruded braided carbon fiber tube according to claim 3, characterized in that: The conveying connection layer (5) includes a conveying inner tube (52). Several pressure-dividing strips (51) are fixedly connected to the outer surface of the conveying inner tube (52). The number of pressure-dividing strips (51) is the same as that of the buffer strips (41). The outer surfaces of several buffer strips (41) are fixedly connected between two adjacent pressure-dividing strips (51). An inverted trapezoidal connecting head (53) is fixedly connected to the end of the pressure-dividing strip (51) away from the conveying inner tube (52). The outer surfaces of several connecting heads (53) are fixedly connected to the inner side of the nearest connecting groove (33). The material of the conveying connection layer (5) is carbon fiber reinforced polytetrafluoroethylene composite material.

5. A high-strength pultruded braided carbon fiber tube according to claim 1, characterized in that: The outer protective reinforcement layer (1) is made of carbon fiber fabric reinforced vinyl ester resin.

6. A high-strength pultruded braided carbon fiber tube according to claim 1, characterized in that: The support rod (6) is made of carbon fiber reinforced plastic and is manufactured by continuous carbon fiber pultrusion molding.

7. A high-strength pultruded braided carbon fiber tube according to claim 1, characterized in that: The pressure-resistant protective layer (2) has a honeycomb structure and is made of phenolic resin-based glass fiber material.

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