Self-anchored composite cable and preparation method thereof

Abstract

The present application provides a self-anchoring composite cable and a preparation method thereof, which relate to the field of civil engineering. The self-anchoring composite cable comprises: two loop cable bodies and a parallel cable body. Each loop cable body comprises a loop and a cable body fixedly connected to the loop. The cable body is formed by stacking multiple layers of carbon fiber prepreg in sequence, wrapping around the loop, and then curing. The fiber length direction of the carbon fiber prepreg is the same as the winding direction of the cable body. The cable body has a first connection end away from the loop along its winding direction. The parallel cable body is a cable body obtained by stacking multiple carbon fiber plates of equal width in parallel. The fiber length direction of the carbon fiber plates is the same as the length direction of the parallel cable body. The parallel cable body has a second connection end corresponding to and overlapping the two loop cable bodies in its length direction. There is a resin layer connecting the two at the overlap. It can improve the problems of existing self-anchoring cables, such as high production cost, cumbersome production, and difficulty in using them as high-tension cables in the construction field.

Description

Technical Field

[0001] The present application relates to the field of civil engineering, and in particular to a self-anchored composite cable and a preparation method thereof. Background Art

[0002] In recent years, carbon fiber cables have been widely used in structures such as long-span bridges and large roofs. Most of the existing carbon fiber cables use an anchoring connection technology similar to that of steel cables, and are anchored by surface anchoring. Existing carbon fiber cable anchors are difficult to apply to the application of high-tensile carbon fiber cables, and they are highly dependent on molds. Usually, self-anchored cables must correspond to molding molds of corresponding sizes. In engineering applications, carbon fiber self-anchored cables of various specifications will have problems such as high manufacturing costs and complicated production processes. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a self-anchored composite cable and a preparation method thereof, which can improve the technical problems of existing self-anchored cables such as high production cost, complicated production and difficulty in application as high-tension cables in the construction field.

[0004] In a first aspect, an embodiment of the present application provides a self-anchored composite cable, comprising: two loop cable bodies and a parallel cable body. Each loop cable body comprises a loop and a cable body fixedly connected to the loop. The cable body is formed by stacking multiple layers of carbon fiber prepreg in sequence, wrapping around the loop, and then curing. The fiber length direction of the carbon fiber prepreg is the same as the winding direction of the cable body. The axis of the loop is perpendicular to the winding direction of the cable body. The cable body has a first connection end away from the loop along its winding direction, and the thickness of the first connection end is less than the diameter of the loop. The parallel cable body is a cable body with a rectangular cross-section obtained by stacking multiple carbon fiber plates of equal width in parallel. The fiber length direction of the carbon fiber plates is the same as the length direction of the parallel cable body. The parallel cable body has second connection ends corresponding to the two loop cable bodies along its length. The second connection ends overlap with the corresponding first connection ends, and a resin layer is present at the overlap to connect the two.

[0005] In the above implementation process, the improvement of the self-anchoring composite cable structure can achieve its rapid production, and has good economy, adaptability and stability. The loop cable body and the parallel cable body are arranged in sections and connected together. Compared with the laying method of directly using carbon fiber prepreg as an integral molding, the self-anchoring composite cable is easy to prepare regardless of its size, and the manufacturing process is simple and controllable. In addition, the fiber length direction of the carbon fiber prepreg is the same as the winding direction of the cable body. The cable body has a first connection end away from the loop along its winding direction. The fiber length direction of the carbon fiber plate is the same as the length direction of the parallel cable body. The parallel cable body has a second connection end corresponding to the two loop cable bodies in its length direction. The mechanical properties of the self-anchoring composite cable obtained along the carbon fiber length direction are superior, thereby obtaining a high-tensile carbon fiber cable. And because the parallel cable body is obtained by stacking multiple carbon fiber plates of equal width in parallel, compared with the parallel cable body obtained by laying carbon fiber prepreg, the force direction of the carbon fiber is straighter and the interlayer direction is more horizontal, so the mechanical properties of the parallel cable body are better. Moreover, the length of the carbon fiber plate can be directly controlled by cutting and there is basically no loss during the cutting process, which effectively improves the utilization rate of the carbon fiber plate and meets the needs of different engineering loads. In addition, the manufacturing process of the carbon fiber plate is mature and can be mass-produced, thereby reducing the difficulty of manufacturing self-anchored composite cables and improving their manufacturing efficiency. It can be used as a high-tensile carbon fiber cable in the construction field.

[0006] In a possible embodiment, the parallel cable body includes an intermediate plate and multiple edge plates, and the multiple edge plates are respectively arranged on both sides of the intermediate plate in the thickness direction; each cable body includes multiple structural layers and at least one reinforcement layer along the thickness direction, and the reinforcement layer has a docking surface docked with the edge plate. The reinforcement layer is sandwiched between two adjacent structural layers, and each structural layer has a lap end extending out of the docking surface, so that when the docking surface is docked with its corresponding edge plate located at the second connection end, the multiple lap ends are respectively overlapped on both sides of the corresponding edge plate in the thickness direction.

[0007] In the above implementation process, the above arrangement can ensure that the first connection end and the second connection end are stably overlapped together, which is beneficial to improving the overlap strength between the second connection end and the first connection end.

[0008] In a possible embodiment, the number of the edge plates is an even number, and the even number of edge plates are symmetrically arranged on both sides of the middle plate.

[0009] In the above implementation process, the symmetrical arrangement not only facilitates the installation of the parallel cable body and reduces the difficulty of preparing the parallel cable body, but also makes the parallel cable body more evenly stressed, thereby improving its mechanical properties.

[0010] In one possible embodiment, the thickness of the middle plate is ≥ the thickness of the edge plates.

[0011] In the above implementation process, since the parallel cable body is a cable body with a rectangular cross-section obtained by stacking multiple carbon fiber plates of equal width in parallel, the thickness of the middle plate is greater than or equal to the thickness of the edge plate, which makes it convenient to use the middle plate to support the edge plate during the preparation process, thereby reducing the difficulty of preparation.

[0012] In a possible implementation manner, the overlap between the first connection end and the second connection end has a smooth transition.

[0013] In the above implementation process, uneven force caused by the uneven connection between the first connection end and the second connection end is avoided, which affects the mechanical properties.

[0014] In a possible embodiment, the self-anchoring composite cable further includes two anchoring structures corresponding to the two looped cable bodies, and each anchoring structure is clamped at the corresponding first connecting end and second connecting end.

[0015] In the above implementation process, the arrangement of the anchoring structure is utilized to effectively improve the lap strength of the first connecting end and the second connecting end, thereby improving the mechanical properties of the self-anchored composite cable.

[0016] In a possible embodiment, the cable body and the outer annular surface of the ring together form a cavity; the ring cable body also includes a support portion arranged in the cavity, the support portion has two inclined surfaces for supporting the cable body, the ends of one end of the two inclined surfaces are respectively tangent to the outer annular surface of the ring, and the ends of the other ends of the two inclined surfaces are connected to form a closed end.

[0017] In the above implementation process, the provision of the support portion not only facilitates the support of the cable body and improves its mechanical properties, but also enables the cable body to maintain a preset shape and avoids attenuation of mechanical properties caused by deformation.

[0018] In a possible implementation manner, the support portion is detachably disposed in the cavity.

[0019] In the above implementation process, the support portion can be removed according to actual needs after preparation is completed, which makes the use more flexible.

[0020] In a possible implementation manner, the support portion is fixedly disposed in the cavity.

[0021] In the above implementation process, the support portion fixed in the cavity is used to keep the cable body in a preset shape, thereby avoiding attenuation of mechanical properties caused by deformation.

[0022] In a second aspect, an embodiment of the present application provides a method for preparing the above-mentioned self-anchored composite cable, which comprises:

[0023] A support portion, a ferrule and carbon fiber prepreg for preparing each ferrule cable body are obtained.

[0024] The intermediate plate and the edge plate for preparing the parallel cable body are obtained.

[0025] After being butt-jointed in the order of the collar, support portion, middle plate, support portion, and collar, the edge plates are laid on the upper and lower sides of the middle plate, and the carbon fiber prepreg is used to bypass the corresponding collar and stacked in sequence to complete the laying of multiple layers of carbon fiber prepreg constituting each cable body. Part of the carbon fiber prepreg along the thickness direction is butt-jointed with the edge plate as a reinforcement layer, and the remaining carbon fiber prepreg is overlapped on the two surfaces of the edge plate in the thickness direction as a structural layer so that the first connection end overlaps with the corresponding second connection end.

[0026] Each first connection end and the corresponding second connection end are connected by means of an anchoring structure and / or resin infusion, and then cured and formed.

[0027] In the above implementation process, the preparation method is simple, the dependence on the mold is small, and the improvement of the self-anchoring composite cable structure can achieve its rapid production, and it has good economy, adaptability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic structural diagram of the self-anchored composite cable provided in this application from a first perspective;

[0030] Figure 2 A schematic diagram of the partial structure of the self-anchored composite cable provided in this application from a second perspective;

[0031] Figure 3 It is a structural diagram of the parallel cable body;

[0032] Figure 4 Schematic diagram of the assembly of the cable body and the collar;

[0033] Figure 5 It is a schematic diagram of the assembly of the loop cable body and the parallel cable body;

[0034] Figure 6 Schematic diagram of the anchoring structure.

[0035] Icons: 1000-self-anchored composite cable; 10-loop cable body; 11-loop; 12-cable body; 121-first section; 122-winding section; 123-second section; 125-structural layer; 126-lap end; 127-reinforcement layer; 128-first docking surface; 129-cavity; 13-first connecting end; 14-support part; 141-inclined surface; 142-second docking surface; 20-parallel cable body; 21-middle plate; 22-edge plate; 23-second connecting end; 30-anchoring structure; 31-metal clip; 311-horizontal clamping surface; 313-inclined clamping surface; 32-fastener. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0040] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0041] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0042] See also Figure 1 as well as Figure 2 The present application provides a flexible self-anchoring composite cable 1000, which mainly includes two loop cable bodies 10 and a parallel cable body 20 that are arranged in sections and connected to each other to form an integral body.

[0043] See also Figures 1 to 4 The loop cable body 10 includes a loop 11 and a cable body 12 fixedly connected to the loop 11. The cable body 12 is formed by sequentially stacking multiple layers of carbon fiber prepreg, wrapping them around the loop 11, and then curing them. The fiber length direction of the carbon fiber prepreg is the same as the winding direction of the cable body 12. The axis of the loop 11 is perpendicular to the winding direction of the cable body 12. The cable body 12 has a first connecting end 13 away from the loop 11 along its winding direction. The thickness of the first connecting end 13 is less than the diameter of the loop 11. The parallel cable body 20 is a cable body with a rectangular cross-section obtained by stacking multiple carbon fiber plates of equal width in parallel. The fiber length direction of the carbon fiber plates is the same as the length direction of the parallel cable body 20. The parallel cable body 20 has second connecting ends 23 along its length corresponding to the two loop cable bodies 10. The second connecting ends 23 overlap the first connecting ends 13, and a resin layer is present at the overlap to connect the two.

[0044] It should be noted that, since the carbon fiber prepreg is impregnated with resin during the overlapping, a resin layer connecting the first connection end 13 and the second connection end 23 exists at the overlapping portion when the self-anchoring composite cable 1000 is prepared after curing.

[0045] In the above implementation process, the improvement of the structure of the self-anchored composite cable 1000 can achieve its rapid production, and has good economy, adaptability and stability. The loop cable body 10 and the parallel cable body 20 are arranged in sections and connected together. Compared with the laying method of directly using carbon fiber prepreg as an integral molding, the self-anchoring composite cable 1000 is easy to prepare regardless of its size, and the manufacturing process is simple and controllable. In addition, the fiber length direction of the carbon fiber prepreg is the same as the winding direction of the cable body 12. The cable body 12 has a first connection end 13 away from the loop 11 along its winding direction. The fiber length direction of the carbon fiber plate is the same as the length direction of the parallel cable body 20. The parallel cable body 20 has a second connection end 23 corresponding to the two loop cable bodies 10 on its length direction. That is, the two loop cable bodies 10 are symmetrically arranged at the two ends of the parallel cable body 20 along the length direction and the fiber length direction is the same. Therefore, the self-anchoring composite cable 1000 finally obtained has excellent mechanical properties along the carbon fiber length direction, thereby obtaining a high-tensile carbon fiber cable.

[0046] Among them, the carbon fiber plate can be prefabricated in advance through an extrusion process. At this time, since the parallel cable body 20 is obtained by stacking multiple carbon fiber plates of equal width in parallel, compared with the parallel cable body 20 obtained by laying carbon fiber prepreg, the force direction of the carbon fiber is straighter and the interlayer direction is more horizontal, so that the mechanical properties of the parallel cable body 20 are better, and the length of the carbon fiber plate can be directly controlled by cutting and there is basically no loss during the cutting process, which effectively improves the utilization rate of the carbon fiber plate and meets the needs of different engineering loads. In addition, the manufacturing process of the carbon fiber plate is mature and can be mass-produced, thereby reducing the manufacturing difficulty of the self-anchored composite cable 1000 and improving its manufacturing efficiency. In addition, the preparation of the parallel cable body 20 is simple, and does not require the cooperation of multiple molds, which simplifies the preparation cost.

[0047] Optionally, see Figure 3 The parallel cable body 20 includes a middle plate 21 and a plurality of edge plates 22 . The plurality of edge plates 22 are respectively arranged on both sides of the middle plate 21 in the thickness direction thereof.

[0048] Optionally, the number of edge plates 22 is an even number, and the even number of edge plates 22 are symmetrically arranged on both sides of the middle plate 21. The above symmetrical arrangement not only facilitates the installation of the parallel cable body 20 and reduces the difficulty of preparing the parallel cable body 20, but also makes the parallel cable body 20 more uniformly stressed, thereby improving its mechanical properties.

[0049] Since the parallel cable body 20 is a cable body obtained by stacking multiple carbon fiber plates of equal width in parallel, in order to facilitate installation and support the edge plates 22 during installation so that they remain in parallel arrangement, the thickness of the middle plate 21 is ≥ the thickness of the edge plate 22. For example, the thickness of the middle plate 21 is twice the thickness of the edge plate 22.

[0050] The material of each ring 11 is metal, including but not limited to stainless steel. The ring 11 is used to support the cable body 12 and is fixedly connected to the cable body 12, so that the self-anchoring composite cable 1000 is easily connected to the target device through the ring 11 when in use.

[0051] Each cable body 12 is formed by stacking multiple layers of carbon fiber prepreg in sequence, wrapping around the corresponding ring 11, and then curing. The above-mentioned arrangement can make good use of the bonding force between the multiple layers of carbon fiber prepreg at the ring 11, the friction between the cable body and the ring 11, the overlap of the second connecting end 23 and the first connecting end 13, and the mechanical bite force and friction between the cable body 12 and the ring 11 caused by the thickness of the first connecting end 13 being less than the diameter of the ring 11, so as to realize the anchoring effect of the ring 11, improve the anchoring efficiency and shorten the anchoring length.

[0052] See also Figure 4 Each cable body 12 comprises a first section 121, a winding section 122, and a second section 123, which are sequentially connected along the winding direction. The winding section 122 is in close contact with the outer surface of the collar 11. The first section 121 is connected to one end of the winding section 122 and is tangential to the collar 11. The second section 123 is connected to the other end of the winding section 122 and is tangential to the collar 11. The end of the first section 121 away from the winding section 122 and the end of the second section 123 away from the winding section 122 together form a first connecting end 13. The thickness of the first connecting end 13 is less than the diameter of the collar 11. In other words, the distance between the first section 121 and the second section 123 gradually decreases from the end closest to the winding section 122 to the end away from the winding section 122.

[0053] The cable body 12 includes multiple structural layers 125 and at least one reinforcing layer 127 along the thickness direction. The reinforcing layer 127 has a first docking surface 128 that docks with the edge plate 22. The reinforcing layer 127 is sandwiched between two adjacent structural layers 125. Each structural layer 125 has a lap end 126 extending out of the first docking surface 128, so that when the first docking surface 128 docks with the corresponding edge plate 22 located at the second connection end 23, the multiple lap ends 126 are respectively overlapped on both sides of the corresponding edge plate 22 in the thickness direction.

[0054] The above arrangement allows the first connection end 13 and the second connection end 23 to be stably overlapped together, which is beneficial for improving the overlap strength between the second connection end 23 and the first connection end 13 .

[0055] Optionally, in order to ensure the stability of the connection, the overlap between the first connection end 13 and the second connection end 23 has a smooth transition.

[0056] like Figure 3As shown, there are two edge panels 22, symmetrically arranged on either side of the middle panel 21. The multiple carbon fiber layers forming the cable body 12 include two structural layers 125 and one reinforcement layer 127. When the first mating surface 128 of the reinforcement layer 127 is mated with the edge panel 22 at the second connection end 23, the overlapping ends 126 of the two structural layers 125 overlap the corresponding edge panels 22 in the thickness direction.

[0057] like Figure 4 As shown, the cable body 12 and the outer surface of the ring 11 together form a cavity 129; wherein the cavity 129 is generally V-shaped. Figure 5 The loop rope body 10 also includes a support portion 14 arranged in the cavity 129, and the support portion 14 has two inclined surfaces 141 for supporting the rope body 12. The ends of one end of the two inclined surfaces 141 are respectively tangent to the outer annular surface of the loop 11, and the ends of the other ends of the two inclined surfaces 141 are connected to form a closed end.

[0058] In some optional embodiments, the support portion 14 is detachably disposed in the cavity 129 .

[0059] In this embodiment, the support portion 14 is fixedly disposed in the cavity 129 .

[0060] Regardless of the embodiment, the support portion 14 can be made of nylon or metal, or other high-temperature-resistant and aging-resistant materials. When the support portion 14 is made of metal, steel with a yield strength of 355 MPa or greater can be selected. In this case, the support portion 14 can be made of the same material as the collar 11 and fixedly connected thereto. In this case, the support portion 14 is securely disposed within the cavity 129.

[0061] In this embodiment, the support portion 14 is fixedly disposed in the cavity 129 and is made of nylon, wherein the closed end of the support portion 14 has a second docking surface 142 that is flush with the first docking surface 128, wherein when the first docking surface 128 docks with the edge plate 22 located at the second connection end 23, the second docking surface 142 docks with the middle plate 21 located at the second connection end 23.

[0062] It should be noted that, in order to ensure that the overlap strength between the second connection end 23 and the first connection end 13 meets the preset requirements, additional resin may be poured into the overlap between the second connection end 23 and the first connection end 13 to bond them together.

[0063] In this embodiment, please refer to Figure 1 as well as Figure 2The self-anchored composite cable 1000 further includes two anchoring structures 30 corresponding to the two looped cable bodies 10. The anchoring structures 30 are clamped between the first and second connecting ends 13, 23 to secure the joint. This ensures that the joint strength per unit area between the second and first connecting ends 23 and 13 is ≥ 20 MPa.

[0064] See also Figure 2 as well as Figure 6 The anchoring structure 30 includes two metal clips 31 respectively arranged on both sides of the overlap of the first connecting end 13 and the second connecting end 23 in the thickness direction, and a plurality of fasteners 32 for fastening the two metal clips 31.

[0065] Each metal clip 31 has a horizontal clamping surface 311 and an inclined clamping surface 313 arranged and connected along the fiber length direction of the carbon fiber prepreg. The horizontal clamping surface 311 has a leading end and a trailing end along the fiber length direction of the carbon fiber prepreg. The leading end is flush with the end surface of the structural layer 125 at the second connection end 23, and the trailing end is flush with the end surface of the parallel cable body 20 at the second connection end 23. The inclined clamping surface 313 extends from the end surface of the parallel cable body 20 toward the side closest to the collar 11, and the inclination angle of the inclined clamping surface 313 is consistent with that of the support member.

[0066] The metal clip 31 has a width direction that is perpendicular to the fiber length direction of the carbon fiber plate and located in the same plane. Optionally, the number of fasteners 32 is an even number, such as two, four, etc. The even number of fasteners 32 is symmetrically distributed on both sides of the metal clip 31 in the width direction. The even number of fasteners 32 forms a clamping space in the width direction of the metal clip 31 for the first connecting end 13 and the second connecting end 23 to pass through.

[0067] The fastener 32 can be a separate countersunk bolt, in which case the metal clip 31 is provided with a screw hole that cooperates with the fastener 32, and the two are fastened by cooperation, or the fastener 32 can be a countersunk bolt and a nut, in which case the metal clip 31 is provided with a through hole that cooperates with the fastener 32, and the countersunk bolt, nut and through hole are fastened by cooperation, which is not limited here.

[0068] See also Figures 1 to 6 The present application also provides a method for preparing a self-anchored composite cable 1000, which comprises:

[0069] S1. Obtaining the support portion 14, the ferrule 11 and the carbon fiber prepreg for preparing each ferrule cable body 10.

[0070] The support portion 14 is made of nylon, the collar 11 is made of stainless steel, and the diameter of the outer ring surface thereof must be greater than 8H.

[0071] The thickness of the second docking surface 142 of the support portion 14 is 2H, and the end of the support portion 14 away from the second docking surface 142 is an arc surface. The thickness of the end of the support portion 14 away from the second docking surface 142 matches the ring 11 by more than 8H, so that the arc surface of the end of the support portion 14 away from the second docking surface 142 can fit tightly with the ring 11, so that the two inclined surfaces 141 of the support portion 14 are respectively tangent to the outer annular surface of the ring 11.

[0072] S2. Obtaining the middle plate 21 and the edge plate 22 for preparing the parallel cable body 20.

[0073] Among them, there is one middle plate 21 with a thickness of 2H and two edge plates 22 with a thickness of H.

[0074] S3. After the ring 11, the support part 14, the middle plate 21, the support part 14, and the ring 11 are connected in sequence, the edge plates 22 are laid on the upper and lower sides of the middle plate 21, and the carbon fiber prepreg is used to bypass the corresponding ring 11 and stacked in sequence to complete the laying of the multiple carbon fiber layers that constitute each cable body 12. Among the multiple carbon fiber layers, part of the carbon fiber prepreg is connected to the edge plate 22 as a reinforcement layer, and the remaining carbon fiber prepreg is used as a structural layer 125 and is overlapped on the two surfaces of the edge plate 22 in the thickness direction so that the first connection end 13 and the second connection end 23 are overlapped.

[0075] Specifically, the collar 11, the support portion 14, the middle plate 21, the support portion 14, and the collar 11 are first connected in sequence, and then the edge plates 22 are laid on the upper and lower sides of the middle plate 21. The two edge plates 22 are symmetrically arranged on the upper and lower sides of the middle plate 21, and the middle plate 21 and the two edge plates 22 are arranged in parallel.

[0076] Then, carbon fiber prepreg is passed through corresponding ferrules 11 and sequentially stacked to complete the laying of the multiple carbon fiber layers that constitute each cable body 12. The two cable bodies 12 can be laid simultaneously or sequentially, without limitation. During the laying process, the multiple carbon fiber layers are divided along the thickness direction into two structural layers 125 and a reinforcement layer 127 positioned between the two structural layers 125. Due to the subsequent extrusion required during the curing process, the thickness of the cured structural layer 125 and reinforcement layer 127 in the final product is reduced. Therefore, the thickness of the uncured structural layer 125 and uncured reinforcement layer 127 at this time is both 1.1H.

[0077] The steps of laying edge plates 22 on the upper and lower sides of the middle plate 21 and using carbon fiber prepreg to pass through the corresponding rings 11 and stack them in sequence to complete the laying of multiple carbon fiber layers constituting each cable body 12 include:

[0078] First, an uncured structural layer 125 made of carbon fiber prepreg is sequentially laid on the surface of the collar 11, the two inclined surfaces 141 of the support portion 14, and the intermediate plate 21 on both sides of the first connecting end 13. Edge plates 22 are then laid on the upper and lower sides of the intermediate plate 21. An uncured reinforcing layer made of carbon fiber prepreg is then laid on the surface of the already laid structural layer 125, abutting against the edge plates 22. Finally, another uncured structural layer 125 made of carbon fiber prepreg is laid on the outer surface of the edge plate 22 at the first connecting end 13 and on the surface of the reinforcing layer. It should be noted that during the actual manufacturing process, it is necessary to pre-position the parts on the mold to ensure that the leading and trailing positions of the parallel cable body 20, the prepreg structural layer 125, and the reinforcing layer 127 meet the design requirements.

[0079] c. Number of laying layers: To adapt to different application requirements, the parallel cable body 20 is set using the quantitative relationship of 1*pultruded sheet center layer + 2N*pultruded sheet outer layers (N is an integer and N ≥ 1); the laying layer portion of the cable body 12 is set using the quantitative relationship of (N+1)*structural layer 125 + N*reinforcement layer 127.

[0080] S4. Connect each first connection end 13 and the corresponding second connection end 23 by using the anchoring structure 30 and / or resin infusion, and then solidify and form.

[0081] In this embodiment, the anchoring structure 30 is used to clamp the first connection end 13 and the second connection end 23 that are overlapped together, and then solidified into shape.

[0082] Each anchoring structure 30 comprises two metal clips 31 and four fasteners 32. The two metal clips 31 are positioned opposite each other along the thickness of the overlapped joint. Their leading ends are flush with the end surface of the structural layer 125 at the second connecting end 23, while their trailing ends are flush with the end surface of the parallel cable body 20 at the second connecting end 23. An inclined clamping surface 313 extends from the end surface of the parallel cable body 20 toward the side closest to the collar 11, with the inclined angle of the inclined clamping surface 313 consistent with that of the support member. The four fasteners 32 are threadedly connected to the two metal clips 31 to clamp the overlapped first and second connecting ends 13, 23.

[0083] In summary, the self-anchored composite cable and its preparation method provided in this application utilize improvements to the structure of the self-anchored composite cable to enable it to not only be used as a high-tensile carbon fiber cable, so that the self-anchored composite cable can be used in construction projects, but also to achieve rapid production of the self-anchored composite cable, with good economy, adaptability and stability.

[0084] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A self-anchored composite cable, characterized in that: include: Two looped cable bodies, each looped cable body comprising a loop and a cable body fixedly connected to the loop, the cable body being formed by sequentially stacking multiple layers of carbon fiber prepreg, wrapping around the loop, and then curing, the fiber length direction of the carbon fiber prepreg being the same as the winding direction of the cable body, the axis of the loop being perpendicular to the winding direction of the cable body, the cable body having a first connection end away from the loop along its winding direction, the thickness of the first connection end being less than the diameter of the loop; and A parallel cable body having a rectangular cross-section and formed by stacking a plurality of carbon fiber plates of equal width in parallel, wherein the fiber length direction of the carbon fiber plates is the same as the length direction of the parallel cable body, and the parallel cable body has second connecting ends corresponding to the two loop cable bodies in the length direction thereof, the second connecting ends overlapping the corresponding first connecting ends, and a resin layer connecting the two at the overlapping portion; The parallel cable body includes a middle plate and a plurality of edge plates, wherein the plurality of edge plates are respectively arranged on both sides of the middle plate in the thickness direction thereof; Each of the cable bodies includes multiple structural layers and at least one reinforcing layer along the thickness direction, the reinforcing layer having a butt joint surface for butting against the edge plate, the reinforcing layer being sandwiched between two adjacent structural layers, and each of the structural layers having an overlapping end extending out of the butt joint surface, so that when the butt joint surface is butt jointed with the corresponding edge plate located at the second connecting end, the multiple overlapping ends are respectively overlapped on both sides of the corresponding edge plate in the thickness direction; The thickness of the middle plate is greater than or equal to the thickness of the edge plates.

2. The self-anchored composite cable according to claim 1, characterized in that: The number of the edge plates is an even number, and the even number of edge plates are symmetrically arranged on both sides of the middle plate.

3. The self-anchored composite cable according to any one of claims 1 to 2, characterized in that: The overlap between the first connection end and the second connection end has a smooth transition.

4. The self-anchored composite cable according to any one of claims 1 to 2, characterized in that: The self-anchoring composite cable further includes two anchoring structures corresponding to the two looped cable bodies, and each anchoring structure is clamped at the corresponding first connecting end and second connecting end.

5. The self-anchored composite cable according to any one of claims 1 to 2, characterized in that: The cable body and the outer annular surface of the collar together form a cavity; The loop rope body also includes a support portion arranged in the cavity, and the support portion has two inclined surfaces for supporting the rope body. The ends of one end of the two inclined surfaces are respectively tangent to the outer annular surface of the loop, and the ends of the other ends of the two inclined surfaces are connected to form a closed end.

6. The self-anchored composite cable according to claim 5, characterized in that: The supporting portion is detachably disposed in the cavity.

7. The self-anchored composite cable according to claim 6, characterized in that: The supporting portion is fixedly disposed in the cavity.

8. A method for preparing the self-anchored composite cable according to claim 1, characterized in that: include: Obtaining the support portion, the loop and the carbon fiber prepreg for preparing each of the loop cable bodies; Obtaining the middle plate and the edge plate for preparing the parallel cable body; After the collar, the support portion, the middle plate, the support portion, and the collar are sequentially butted together, edge plates are laid on the upper and lower sides of the middle plate, and carbon fiber prepreg is used to pass through the corresponding collars and sequentially stacked to complete the laying of multiple layers of carbon fiber prepreg constituting each cable body, wherein a portion of the carbon fiber prepreg along the thickness direction is butted against the edge plates as a reinforcement layer, and the remaining carbon fiber prepreg is overlapped as a structural layer on both surfaces of the edge plates in the thickness direction so that the first connection end overlaps the corresponding second connection end; Each first connection end and the corresponding second connection end are connected by means of an anchoring structure and / or resin infusion, and then cured and formed.

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