A carbon fibre beam

Abstract

The utility model discloses a carbon fiber crossbeam, including square base material layer and first UD carbon cloth layer, first 3K carbon fiber layer from inside to outside are stacked in square base material layer outward successively, square base material layer includes four square hollow base body, square hollow base body includes second 3K carbon fiber layer, second UD carbon cloth layer from inside to outside are stacked successively, and four square hollow base body is two rows two columns and is spliced into an organic whole, and the outer surface of adjacent two square hollow base body is concave to form recess together inward, third UD carbon cloth layer that is stacked in recess outward with second UD carbon cloth layer's outside is flush is stacked in recess outward with second UD carbon cloth layer's outside is flush. Through the outer surface of adjacent two square hollow base body is concave to form recess together inward, cooperate recess outward with second UD carbon cloth layer's outside is flush and be stacked third UD carbon cloth layer that is stacked in recess, strengthen the structural strength at stress concentration, and then strengthen the overall structure of this carbon fiber crossbeam, to better satisfy the use scene of high strength.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber beams, and in particular to a carbon fiber beam that is mainly used in industrial beams. Background Technology

[0002] Beams are the main load-bearing components that are placed horizontally (or tilted) in structures such as buildings and bridges. Their core mission is to resist bending deformation and transfer the load from above to the columns or load-bearing walls. In traditional technology, beams are usually made of metal, marble, etc., which have low structural strength and heavy weight.

[0003] In the prior art, in order to balance the lightweight and structural strength of the beam, a carbon fiber beam has emerged. It has a square hollow tube body and a cross-shaped partition plate formed by the intersection of longitudinal and transverse plates connected to the square hollow tube body. The aim is to improve the load-bearing capacity of the beam by using carbon fiber material in combination with the cross structure to achieve the purpose of weight reduction. However, in high-intensity use scenarios, when the beam is subjected to large external forces, the stress of this cross-shaped structure will be concentrated at the connection between the cross structure and the inner wall of the beam, which will make the connection prone to fatigue cracks or even fractures, making it difficult to meet the requirements of high-intensity use scenarios.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a carbon fiber beam. This beam has a groove formed by the inward indentation of the outer surfaces of two adjacent square hollow substrates. A third UD carbon fiber cloth layer, whose outer side is flush with the outer side of the second UD carbon fiber cloth layer, is stacked in the groove. This strengthens the structural strength at stress concentration points and thus enhances the overall structure of the carbon fiber beam, so as to better meet the needs of high-strength application scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A carbon fiber crossbeam includes a square substrate layer and a first UD carbon fiber cloth layer and a first 3K carbon fiber layer, which are sequentially stacked outside the square substrate layer from the inside out; wherein: The square substrate layer includes four square hollow substrates. Each square hollow substrate includes a second 3K carbon fiber layer and a second UD carbon fiber cloth layer stacked sequentially from the inside out. The four square hollow substrates are spliced ​​together in two rows and two columns. The outer surfaces of two adjacent square hollow substrates are recessed inward to form a groove. A third UD carbon fiber cloth layer with an outer side flush with the outer side of the second UD carbon fiber cloth layer is stacked in the groove.

[0007] As a preferred embodiment, the second and third UD carbon fiber fabric layers each include four layers of UD0° yarn and four layers of UD45° yarn stacked sequentially, and the first UD carbon fiber fabric layer includes nine layers of UD0° yarn and nine layers of UD45° yarn stacked sequentially.

[0008] As a preferred embodiment, a first UD carbon fiber cloth layer is located on the top surface of a square substrate layer, and a honeycomb-shaped aluminum plate and a fourth UD carbon fiber cloth layer are stacked on its top surface in sequence.

[0009] As a preferred embodiment, the fourth UD carbon fiber fabric layer comprises eight layers of UD0° yarn.

[0010] As a preferred embodiment, the thickness of the aluminum plate is greater than the thickness of the fourth UD carbon fiber cloth layer.

[0011] As a preferred embodiment, the first 3K carbon fiber layer comprises two layers of 3K yarn, and the second 3K carbon fiber layer comprises one layer of 3K yarn.

[0012] As a preferred embodiment, the groove is an isosceles trapezoid with a smaller inner side and a larger outer side.

[0013] As a preferred embodiment, the depth of the groove is equal to the sum of the wall thicknesses between two adjacent square hollow substrates.

[0014] As a preferred embodiment, the square hollow matrix further includes four removable core materials, with the second 3K carbon fiber layer and the second UD carbon fiber cloth layer stacked sequentially from the inside out on the outer periphery of the removable core materials.

[0015] As a preferred embodiment, the releaseable core material is EPS core material.

[0016] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution: The main feature is that a groove is formed by the inward indentation of the outer surfaces of two adjacent square hollow substrates. A third UD carbon fiber cloth layer, whose outer side is flush with the outer side of the second UD carbon fiber cloth layer, is stacked in the groove. This strengthens the structural strength at the stress concentration point and thus enhances the overall structure of the carbon fiber beam to better meet the needs of high-strength applications.

[0017] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a perspective view of a preferred embodiment of the present invention (excluding the removable core material). Figure 2This is a side view of a preferred embodiment of the present invention (excluding the removable core material). Figure 3 yes Figure 2 Cross-sectional view at point A in the middle; Figure 4 This is a three-dimensional schematic diagram of a preferred embodiment of the present invention (including a detachable core material).

[0019] Explanation of reference numerals in the attached diagram: 10. Square substrate layer; 11. Square hollow matrix; 111. Second 3K carbon fiber layer; 112. Second UD carbon fiber cloth layer; 12. Descalable core material; 101. Groove; 20. First UD carbon fiber fabric layer; 30. First 3K carbon fiber layer; 40. Third UD carbon fiber cloth layer; 50. Aluminum plate; 60. Fourth UD carbon fiber fabric layer. Detailed Implementation

[0020] First, it should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] Please refer to Figures 1 to 4 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, including a square substrate layer 10 and a first UD carbon fiber cloth layer 20 and a first 3K carbon fiber layer 30 stacked sequentially from the inside out outside the square substrate layer 10.

[0022] The square substrate layer 10 includes four square hollow substrates 11. Each square hollow substrate 11 includes a second 3K carbon fiber layer 111 and a second UD carbon fiber cloth layer 112 stacked sequentially from the inside out. The four square hollow substrates 11 are spliced ​​together in two rows and two columns. The outer surfaces of two adjacent square hollow substrates 11 are recessed inward to form a groove 101. A third UD carbon fiber cloth layer 40 with an outer side flush with the outer side of the second UD carbon fiber cloth layer 112 is stacked in the groove 101.

[0023] Specifically, the first UD carbon fiber cloth layer 20 located on the top surface of the square substrate layer 10 has a honeycomb-shaped aluminum plate 50 and a fourth UD carbon fiber cloth layer 60 stacked on its top surface, and the thickness of the aluminum plate 50 is greater than the thickness of the fourth UD carbon fiber cloth layer 60. Furthermore, the first 3K carbon fiber layer 30 includes two layers of 3K yarn, the second 3K carbon fiber layer 111 includes one layer of 3K yarn, the first UD carbon fiber fabric layer 20 includes nine layers of UD0° yarn and nine layers of UD45° yarn stacked sequentially, the second UD carbon fiber fabric layer 112 and the third UD carbon fiber fabric layer 40 each include four layers of UD0° yarn and four layers of UD45° yarn stacked sequentially, and the fourth UD carbon fiber fabric layer 60 includes eight layers of UD0° yarn.

[0024] In this embodiment, the groove 101 is an isosceles trapezoid with a smaller inner side and a larger outer side, and the depth of the groove 101 is equal to the sum of the wall thicknesses between two adjacent square hollow substrates 11.

[0025] See Figure 4 As shown, the square hollow matrix 11 also includes four detachable core materials 12. The second 3K carbon fiber layer 111 and the second UD carbon fiber cloth layer 112 are stacked sequentially from the inside to the outside of the detachable core material 12. The detachable core material 12 is EPS core material. An air bag is fitted around the outside of the EPS core material, so that the carbon fiber industrial beam is obtained by molding and blowing. After obtaining the carbon fiber industrial beam, the EPS core material is removed.

[0026] The working process of this embodiment is described in detail below: Step 1: The release core material is wrapped around a ring of 3K yarn. The four release core materials of this carbon fiber industrial beam are all the same size. The same steps are repeated 4 times.

[0027] Step 2: Ensure the wall thickness of the intermediate cavity. Apply 8 layers of UD yarn, increasing the thickness layer by layer. When 4 layers of UD yarn have been applied, a pre-pull operation is required for 5 minutes. After applying the remaining 4 layers, a pre-pull operation is performed again for 5 minutes. The four releaseable core materials of this carbon fiber industrial beam are all of the same specification, and the same steps are repeated 4 times.

[0028] Step 3: Reinforce and fill the grooved area. Eight layers of UD yarn are required for reinforcement in four areas. The upper and lower areas should have the same specifications, and the left and right areas should have the same specifications.

[0029] Step 4: Splice and wrap the entire outer perimeter with UD yarn, with the overlap seams on the top and bottom. Each layer should have an overlap interval of 24mm, for a total of 9 layers. After applying 5 layers, pre-pull for 5 minutes, and then pre-pull again for the remaining 4 layers.

[0030] Step 5: Continue to splice and wrap the UD yarn around the entire perimeter, with the overlap seams on the left and right sides. The overlap interval between each layer is 15mm, for a total of 9 layers. After 5 layers are applied, pre-pull for 5 minutes, and then pre-pull again for the remaining 4 layers.

[0031] Step 6: Place a honeycomb-shaped aluminum plate on the reinforced and thickened surface of the product, and then apply 8 layers of reinforcing UD yarn for 5 minutes. Step 7: Overlap two layers of 3K yarn on the outermost layer, with an overlap of 15mm. After completion, pre-dry for 30 minutes.

[0032] The key design feature of this utility model is: The main feature is that a groove is formed by the inward indentation of the outer surfaces of two adjacent square hollow substrates. A third UD carbon fiber cloth layer, whose outer side is flush with the outer side of the second UD carbon fiber cloth layer, is stacked in the groove. This strengthens the structural strength at the stress concentration point and thus enhances the overall structure of the carbon fiber beam to better meet the needs of high-strength applications.

[0033] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A carbon fiber crossbeam, characterized in that: It includes a square substrate layer and a first UD carbon fiber cloth layer and a first 3K carbon fiber layer, which are stacked sequentially from the inside out outside the square substrate layer; wherein: The square substrate layer includes four square hollow substrates. Each square hollow substrate includes a second 3K carbon fiber layer and a second UD carbon fiber cloth layer stacked sequentially from the inside out. The four square hollow substrates are spliced ​​together in two rows and two columns. The outer surfaces of two adjacent square hollow substrates are recessed inward to form a groove. A third UD carbon fiber cloth layer with an outer side flush with the outer side of the second UD carbon fiber cloth layer is stacked in the groove.

2. The carbon fiber crossbeam according to claim 1, characterized in that: The second and third UD carbon fiber fabric layers each include four layers of UD0° yarn and four layers of UD45° yarn stacked sequentially, while the first UD carbon fiber fabric layer includes nine layers of UD0° yarn and nine layers of UD45° yarn stacked sequentially.

3. A carbon fiber crossbeam according to claim 1 or 2, characterized in that: The first UD carbon fiber cloth layer is located on the top surface of the square substrate layer, and a honeycomb-shaped aluminum plate and a fourth UD carbon fiber cloth layer are stacked on its top surface in sequence.

4. A carbon fiber crossbeam according to claim 3, characterized in that: The fourth UD carbon fiber fabric layer comprises eight layers of UD0° yarn.

5. A carbon fiber crossbeam according to claim 3, characterized in that: The thickness of the aluminum plate is greater than the thickness of the fourth UD carbon fiber cloth layer.

6. A carbon fiber crossbeam according to claim 2, characterized in that: The first 3K carbon fiber layer comprises two layers of 3K yarn, and the second 3K carbon fiber layer comprises one layer of 3K yarn.

7. A carbon fiber crossbeam according to claim 1, characterized in that: The groove is an isosceles trapezoid with a smaller inner side and a larger outer side.

8. A carbon fiber crossbeam according to claim 7, characterized in that: The depth of the groove is equal to the sum of the wall thicknesses between two adjacent square hollow substrates.

9. A carbon fiber crossbeam according to claim 1, characterized in that: The square hollow matrix also includes four removable core materials, with the second 3K carbon fiber layer and the second UD carbon fiber cloth layer stacked sequentially from the inside out on the outer periphery of the removable core materials.

10. A carbon fiber crossbeam according to claim 9, characterized in that: The releaseable core material is EPS core material.

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