Method for manufacturing a parallel flat cable structure with replaceable cable body

Abstract

The application relates to the application field of engineering material CFRP, in particular to a manufacturing method of a plug-in type parallel plate cable structure with replaceable cable bodies, which comprises an anchor head and parallel plate cable bodies, the anchor head comprises a stainless steel anchor core, the parallel plate cable bodies comprise a plurality of cable body carbon plates arranged in parallel, the end of the anchor head is butted with the end of one cable body carbon plate, thermoplastic carbon fiber prepreg and triaxial carbon plates are alternately arranged outside the stainless steel anchor core, the overlapping area of the thermoplastic carbon fiber prepreg and the cable body carbon plate is a bonding area, the end of the thermoplastic carbon fiber prepreg extends to the bonding area and is located between adjacent cable body carbon plates, and the end of the triaxial carbon plate is butted with the end of the cable body carbon plate. The application has the following beneficial effects: small production difficulty, high anchoring efficiency, easy on-site construction operation and replaceable single cable body.

Description

Technical Field

[0001] This invention relates to the field of CFRP (Cemented Polymer Reinforced Plastic) engineering materials, and particularly to a method for manufacturing a plug-in parallel plate cable structure with replaceable cable bodies. Background Technology

[0002] CFRP is a carbon fiber reinforced composite material. With the large-scale application of CFRP anchor cables in various projects in recent years, parallel plate cables, as one of the main forms of carbon fiber anchor cables, have been developed by major universities and companies into a variety of structural forms based on mechanical locking and interface bonding. This has greatly optimized the problems of traditional metal cables, such as large volume, heavy weight, complicated assembly, difficult transportation, difficult installation, and difficult maintenance. It not only provides designers with more structural options but also reduces production difficulty. Furthermore, it brings many conveniences to the operation, construction, and maintenance aspects involved in engineering projects, demonstrating significant advantages.

[0003] Currently, plate-cable structures in the industry have distinct characteristics: solid cable bodies are limited by transportation difficulties and low anchoring efficiency, making them unsuitable for large-span applications like bar cables; multi-layer plate cable bodies are limited by slippage and fatigue issues between the anchoring end and the cable body under long-term stress during operation, resulting in a shorter lifespan for plate cables, frequent cable replacements, large project investments, and high risks. Summary of the Invention

[0004] The purpose of this invention is to provide a method for manufacturing a plug-in parallel plate cable structure with replaceable cable bodies, which has the characteristics of low production difficulty, high anchoring efficiency, easy on-site construction operation, and replaceable single cable bodies.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] A replaceable cable-connected parallel plate cable structure includes an anchor head and a parallel plate cable body. The anchor head includes a stainless steel anchor core, and the parallel plate cable body includes several parallelly arranged cable body carbon plates. The end of the anchor head is connected to the end of one of the cable body carbon plates. The stainless steel anchor core is alternately decorated with thermoplastic carbon fiber prepreg and triaxial carbon plates. The overlap area between the thermoplastic carbon fiber prepreg and the cable body carbon plates is the bonding area. The ends of the thermoplastic carbon fiber prepreg extend to the bonding area and are located between adjacent cable body carbon plates. The ends of the triaxial carbon plates are connected to the ends of the cable body carbon plates.

[0007] Preferably, the end of the stainless steel anchor core has the same thickness as the carbon plate of the cable body.

[0008] Preferably, the thickness of the thermoplastic carbon fiber prepreg is half that of the carbon fiber sheet.

[0009] Preferably, pressure plates for fastening are provided above and below the bonding area.

[0010] Preferably, the carbon plates used in the cable body are of the same specification, with consistent parameters such as straightness, resin content, and dimensions.

[0011] Preferably, the triaxial carbon plate is made of triaxial carbon cloth in the ±45° and 0° directions using a molding process, and the resin content, 0° monofilament direction, and thickness are consistent with the filament carbon plate.

[0012] Preferably, the number of carbon fiber plates in the cable body is odd, the carbon fiber plate that is connected to the stainless steel anchor core is the central carbon fiber plate, and the number of carbon fiber plates distributed at the upper and lower ends is even and symmetrically distributed.

[0013] Preferably, the ends of the thermoplastic carbon fiber prepreg are located in the area between the middle and right of the bonding zone, and the ends of the thermoplastic carbon fiber prepreg are distributed in a V-shape on both sides of the central carbon plate.

[0014] The manufacturing method of a plug-in parallel plate cable structure with replaceable cable bodies, where the finished product is manufactured in the factory and directly applied in a project, adopts the following steps:

[0015] Step 1: Connect the stainless steel anchor core to the carbon fiber plate of the cable body, with the end height H of the stainless steel anchor core being... 锚芯 With the thickness H of the carbon plate of the cable body 碳板 Consistent, then use 1 / 2H 碳板 Thick thermoplastic carbon fiber prepreg is wound to cover the bonding area;

[0016] Step 2: Place carbon fiber plates on the top and bottom of the bonding area, and then lay down a triaxial carbon fiber plate as a buffer layer;

[0017] Step 3: Use 1 / 2H 碳板 Thick thermoplastic carbon fiber prepreg is wound to cover the bonding area;

[0018] Step 4: Repeat steps 2 and 3 to achieve the preset structure;

[0019] Step 5: Align the pressure plate with the preset position and tighten it securely.

[0020] Step Six: Using tensioning equipment and an insulation box, continuously apply a tension of ≥80% of the theoretical maximum load to the anchor head area, and then perform vacuum curing.

[0021] As a preferred method, when manufacturing semi-finished products in the factory and assembling them quickly on-site, the following steps are included:

[0022] Step 1: Produce according to steps 1 to 6. Replace the carbon steel plate of the cable body with a substitute steel plate. Do not apply release agent to the interface. Use release cloth to demold. The thickness of the substitute steel plate + the thickness of the release cloth = the thickness of the carbon steel plate of the cable body.

[0023] Step 2: Remove the release cloth and replacement steel plate, and perform plasma spraying on the bonding area interface;

[0024] Step 3: Cut the carbon steel plates of the cable body on site according to the length of each layer of carbon steel plates in the plug-in anchor head;

[0025] Step 4: Begin bonding from the center carbon fiber plate and work outwards in sequence;

[0026] Step 5: Align the pressure plate with the preset position and tighten it securely.

[0027] Step 6: Vacuum curing is performed using an insulated box.

[0028] In summary, the present invention has the following beneficial effects:

[0029] 1. Pultrusion-formed parallel plate cables have the advantages of high strength, good stability, low cost, and the production of cables is not limited by production equipment and site.

[0030] 2. Thermoplastic carbon fiber prepreg is molded under stress, and the direction of fiber stress is more in line with the actual application of cables;

[0031] 3. Using a molded triaxial carbon plate as a buffer layer can effectively decompose tensile stress and improve the interlayer shear force of the carbon plate in the cable;

[0032] 4. The quick-assembly anchor head can be assembled on-site, solving transportation problems and reducing process difficulty;

[0033] 5. When the parallel plate cable is damaged, the parallel plate cable can be replaced separately, which greatly reduces the cost of use;

[0034] 6. The multi-layered cable-type carbon plate has a reasonable stress mechanism. Under the action of complex forces such as vibration and wind load, it can offset the force through torsional deformation. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of Example 1;

[0036] Figure 2 This is a schematic diagram of Example 2.

[0037] In the figure, 1 is the anchor head; 11 is the stainless steel anchor core; 12 is the thermoplastic carbon fiber prepreg; 13 is the triaxial carbon plate; 14 is the central carbon plate; 2 is the parallel plate cable body; 21 is the cable body carbon plate; 22 is the bonding area; and 23 is the pressure plate. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings.

[0039] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0040] Example 1: A plug-in parallel plate cable structure with replaceable cable bodies.

[0041] like Figure 1 As shown, the system includes an anchor head 1 and a parallel plate cable body 2. The anchor head 1 includes a stainless steel anchor core 11, and the parallel plate cable body 2 includes several parallel carbon fiber plates 21. The end of the anchor head 1 is connected to the end of one of the carbon fiber plates 21. The end thickness of the stainless steel anchor core 11 is the same as the thickness of the carbon fiber plate 21. The number of carbon fiber plates 21 is odd, and the carbon fiber plate 21 connected to the stainless steel anchor core 11 is the central carbon fiber plate 14. The number of carbon fiber plates 21 distributed at the upper and lower ends is even and symmetrically distributed. The carbon fiber plates 21 are all of the same specification, with consistent parameters such as straightness, resin content, and dimensions. A stainless steel anchor core 11 is alternately surrounded by thermoplastic carbon fiber prepreg 12 and triaxial carbon fiber plates 13. The overlapping area between the thermoplastic carbon fiber prepreg 12 and the carbon fiber plate 21 is the bonding area 22. The ends of the thermoplastic carbon fiber prepreg 12 extend into the bonding area 22 and are located between adjacent carbon fiber plates 21. The thickness of the thermoplastic carbon fiber prepreg 12 is half that of the carbon fiber plate 21. The ends of the triaxial carbon fiber plates 13 are respectively connected to the ends of the carbon fiber plates 21. The triaxial carbon fiber plates 13 are pre-molded using a molding process with triaxial carbon cloth in the ±45° and 0° directions. The resin content, 0° monofilament direction, and thickness are consistent with those of the carbon fiber plate 21. The ends of the thermoplastic carbon fiber prepreg 12 are located in the area between the middle and right side of the bonding area 22. The ends of the thermoplastic carbon fiber prepreg 12 are distributed in a V-shape on both sides of the central carbon fiber plate 14. Pressure plates 23 for fastening are provided above and below the bonding area 22.

[0042] Example 2: Method for manufacturing a plug-in parallel plate cable structure with replaceable cable body.

[0043] like Figure 2 As shown, when manufacturing finished products in the factory for direct application in engineering projects, the following steps are adopted:

[0044] Step 1: Connect the stainless steel anchor core 11 to the carbon fiber plate 21 of the cable body. The end height H of the stainless steel anchor core 11 is... 锚芯 With the thickness H of the carbon plate 21 of the cable body 碳板 Consistent, then use 1 / 2H carbon plate thickness thermoplastic carbon fiber prepreg 12 to wrap and cover the bonding area 22;

[0045] Step 2: Place carbon plates on the upper and lower surfaces of the bonding area 22 according to the predetermined positions, and then lay the triaxial carbon plate 13, which serves as a buffer layer, in the predetermined positions;

[0046] Step 3: Use 1 / 2H 碳板 Thick thermoplastic carbon fiber prepreg 12 is wound to cover the bonding area 22;

[0047] Step 4: Repeat steps 2 and 3 to achieve the preset structure;

[0048] Step 5: Align the pressure plate 23 with the preset position and use tools to tighten it as a whole;

[0049] Step 6: Using a tensioning device and an insulation box, continuously apply a tension of ≥80% of the theoretical maximum load to the anchor head area 1, and perform vacuum curing according to the condition of the thermoplastic prepreg.

[0050] When manufacturing semi-finished products in the factory and then quickly assembling them on-site, the following steps are included:

[0051] Step 1: Make the cable body carbon plate 21 according to the above operation steps 1 to 6. Replace the cable body carbon plate 21 with a substitute steel plate. Do not apply release agent to the interface. Use release cloth to demold. The thickness of the replacement steel plate + the thickness of the release cloth = the thickness of the cable body carbon plate 21.

[0052] Step 2: Remove the release cloth and replacement steel plate, and perform plasma spraying on the interface of bonding area 22;

[0053] Step 3: Cut the on-site cable carbon plates 21 according to the length of each layer of the three-axis carbon plates 13 of the plug-in anchor head 1;

[0054] Step 4: Begin bonding from the center carbon plate 14, and work outwards in sequence;

[0055] Step 5: Align the pressure plate 23 with the preset position and use tools to tighten it as a whole;

[0056] Step 6: Vacuum curing is performed using an insulated box, depending on the condition of the thermoplastic prepreg.

[0057] It should be added that:

[0058] The carbon plates 21 for the cable body must use carbon plates of the same specification, and the parameters such as straightness, resin content, and size must be kept consistent.

[0059] Triaxial carbon plate 13 is made of triaxial carbon cloth in the ±45° and 0° directions by pre-molding process. The resin content, 0° monofilament direction and thickness are consistent with the cable carbon plate 21. It is used to improve the interlayer stress and convert the compressive stress in different directions of the cable into horizontal tensile shear force.

[0060] The height of the stainless steel anchor core 11 is twice the height of the parallel plate cable 2, and the length of the stainless steel anchor core 11 is greater than or equal to twice its height, with a coefficient of 3-5 being optimal.

[0061] The number of carbon plates 21 in the cable body is odd, and the carbon plate that connects with the stainless steel anchor core 11 is the central carbon plate 14. The number of carbon plates distributed at the upper and lower ends is even and symmetrically distributed, which is conducive to constructing a balanced force structure.

[0062] The overlap area between the thermoplastic carbon fiber prepreg 12 and the carbon plate 21 of the cable body is the bonding area 22. The bonding force in this area is the direct basis for designing the breaking force of the cable. The anchoring method of this patent has been verified. It is recommended to design the breaking force of the cable ≥ 2 * the bonding force of the bonding area 22. The bonding strength per unit area can be calculated according to 22 MPa.

[0063] The laying pattern of thermoplastic carbon fiber prepreg 12 in the bonding area 22 is as follows: the end length extends from the carbon plate joint to the center point of the bonding area 22, from the central carbon plate 14 outwards, forming a V-shaped distribution (first decreasing, then increasing). The two end positions of the same layer of thermoplastic carbon fiber prepreg 12 are consistent, and the overall distribution forms a reciprocating cyclic arrangement.

[0064] For large-tonnage cables with many layers, the main approach should be to increase the number of cycles to avoid excessive concentration of internal shear force, which could damage the 22 fibers in the bonding area.

Claims

1. A method for manufacturing a replaceable cable-connected parallel plate cable structure, comprising an anchor head (1) and a parallel plate cable body (2), wherein the anchor head (1) comprises a stainless steel anchor core (11), and the parallel plate cable body (2) comprises a plurality of parallelly arranged cable carbon plates (21), characterized in that, The end of the anchor head (1) is connected to the end of one of the cable carbon plates (21). The stainless steel anchor core (11) is alternately provided with thermoplastic carbon fiber prepreg (12) and triaxial carbon plate (13). The overlap area between the thermoplastic carbon fiber prepreg (12) and the cable carbon plate (21) is the bonding area (22). The ends of the thermoplastic carbon fiber prepreg (12) extend to the bonding area (22) and are located between adjacent cable carbon plates (21). The ends of the triaxial carbon plate (13) are connected to the ends of the cable carbon plate (21). The triaxial carbon plate (13) is made of triaxial carbon cloth in the ±45° and 0° directions by pre-molding process, and the resin content, 0° monofilament direction and thickness are consistent with the cable carbon plate (21). When manufacturing finished products in the factory for direct application in engineering projects, the following steps are adopted: Step 1: Connect the stainless steel anchor core (11) to the carbon plate (21) of the cable body, with the end height H of the stainless steel anchor core (11) being... 锚芯 With the thickness H of the carbon plate (21) of the cable body 碳板 Consistent, then use 1 / 2 of H 碳板 A thermoplastic carbon fiber prepreg (12) of a certain thickness is wound to cover the bonding area (22); Step 2: Place carbon plates on the top and bottom of the bonding area (22), and then lay triaxial carbon plates (13) as a buffer layer; Step 3: Use 1 / 2 of H 碳板 A thermoplastic carbon fiber prepreg (12) of a certain thickness is wound to cover the bonding area (22); Step 4: Repeat steps 2 and 3 to achieve the preset structure; Step 5: Align the pressure plate (23) with the preset position and tighten it as a whole; Step 6: Using tensioning equipment and an insulation box, continuously apply a tension of ≥80% of the theoretical maximum load to the anchor head (1) area and perform vacuum curing; When manufacturing semi-finished products in the factory and then quickly assembling them on-site, the following steps are included: Step 1: Make the finished product according to the operation steps 1 to 6 in the factory, replace the cable carbon plate (21) with a substitute steel plate, do not apply release agent to the interface, use release cloth to demold, the thickness of the substitute steel plate + the thickness of the release cloth = the thickness of the cable carbon plate (21); Step 2: Remove the release cloth and replacement steel plate, and perform plasma spraying on the interface of the bonding area (22); Step 3: Cut the carbon plates (21) of the cable body on site according to the length of each layer of carbon plates of the plug-in anchor head (1); Step 4: Begin bonding from the central carbon plate (14) and work outwards in sequence; Step 5: Align the pressure plate (23) with the preset position and tighten it as a whole; Step 6: Vacuum curing is performed using an insulated box.

2. The method for manufacturing the plug-in parallel plate cable structure with replaceable cable bodies according to claim 1, characterized in that, The thickness of the thermoplastic carbon fiber prepreg (12) is half that of the slab carbon sheet (21).

3. The method for manufacturing the plug-in parallel plate cable structure with replaceable cable bodies according to claim 1, characterized in that, The bonding area (22) is provided with pressure plates (23) for fastening.

4. The method for manufacturing the plug-in parallel plate cable structure with replaceable cable bodies according to claim 1, characterized in that, The carbon plates (21) of the cable body use carbon plates of the same specification, with consistent straightness, resin content and dimensional parameters.

5. The method for manufacturing the plug-in parallel plate cable structure with replaceable cable bodies according to claim 1, characterized in that, The number of carbon plates (21) is odd. The carbon plate (21) that is connected to the stainless steel anchor core (11) is the central carbon plate (14). The number of carbon plates (21) distributed at the upper and lower ends is even and symmetrically distributed.

6. The method for manufacturing a plug-in parallel plate cable structure with replaceable cable bodies according to claim 1, characterized in that, The ends of the thermoplastic carbon fiber prepreg (12) are located in the area between the middle and right side of the bonding area (22), and the ends of the thermoplastic carbon fiber prepreg (12) are distributed in a V-shape on both sides of the central carbon plate (14).

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