Preparation device and method of carbon fiber composite material rib for ocean engineering

Abstract

The invention relates to the technical field of ocean engineering materials, in particular to a device and method for preparing a carbon fiber composite material rib for ocean engineering, and the device comprises a carbon fiber creel, a glue injection device, a yarn collecting hole, a pre-forming mold, a winding device, a curing mold, an unwinding machine, a traction machine, a cutting machine and a winding machine. A fiber drying oven for carbon fiber yarns to pass through is arranged between the carbon fiber creel and the glue injection device; an optical fiber pay-off reel is arranged between the fiber drying oven and the glue injection device; the glue injection device is a cylindrical linear glue injection box, the top of the glue injection device is connected with a resin pre-storage box, the two ends of the glue injection device are connected with a first yarn splitting plate and a second yarn splitting plate respectively, optical fiber passing holes are formed in the middle of the first yarn splitting plate and the middle of the second yarn splitting plate, and fiber passing holes are formed in the edges of the first yarn splitting plate and the second yarn splitting plate in the circumferential direction. The material is high in comprehensive performance and low in preparation cost.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engineering materials, and in particular to a device and method for preparing carbon fiber composite material reinforcement for marine engineering. Background Art

[0002] With the acceleration of global development and utilization of marine resources, the requirements for material performance in the marine engineering field are increasing. Although traditional marine engineering materials, such as steel, have certain strength and durability, they often show problems such as insufficient corrosion resistance, heavy weight, and high maintenance costs when facing complex marine environments. Therefore, it is particularly important to develop a new type of marine engineering material with high performance, high toughness, corrosion resistance and intelligent characteristics.

[0003] As an advanced high-performance material, carbon fiber composites have been widely used in aerospace, automobile, sports equipment and other fields due to their excellent properties such as light weight, high strength and corrosion resistance. In recent years, with the continuous advancement of technology, the application of carbon fiber composites in the field of marine engineering has gradually increased. However, the existing carbon fiber composites still need to be improved in terms of toughness and intelligence, and cannot meet the higher requirements of marine engineering for material performance.

[0004] Fiber optic intelligent technology is a technology that embeds fiber optic sensors into materials to achieve real-time monitoring of material properties and intelligent response. Through fiber optic sensors, material parameters such as stress, strain, and temperature can be monitored in real time, providing important data support for health monitoring and safety assessment of marine engineering structures. At the same time, combined with intelligent control algorithms, it can also achieve self-regulation and optimization of material properties, improving the overall performance and safety of marine engineering structures.

[0005] Existing carbon fiber composite materials for marine engineering have the following disadvantages:

[0006] 1. Insufficient material toughness.

[0007] Current state of the art: Although carbon fiber composite materials have been widely used in marine engineering, their toughness is relatively limited. In complex marine environments, long-term exposure to dynamic loads and extreme conditions can easily lead to fatigue damage and fracture of materials, thus affecting the safety and service life of marine engineering structures.

[0008] Reason: The formula and preparation process of traditional carbon fiber composites fail to fully optimize the toughness of the material, especially in terms of the interface bonding between the fiber and the matrix, the arrangement of the fibers, and the toughening modification of the matrix.

[0009] 2. The level of intelligent monitoring is low.

[0010] Current state of the art: Currently, monitoring methods in marine engineering structures mostly rely on traditional sensors and equipment with low intelligence levels. These sensors can often only monitor limited parameters, and their data transmission and processing capabilities are limited, making it difficult to timely and accurately reflect the actual condition of the structure.

[0011] Reason: The application of fiber optic sensing technology in marine engineering is not yet extensive and in-depth, especially in the lack of mature technical solutions in combination with carbon fiber composite materials. In addition, key technologies such as fiber optic sensor embedding, signal transmission and data processing still need further breakthroughs.

[0012] 3. The overall performance needs to be improved.

[0013] Current state of the art: Although carbon fiber composite materials have advantages in strength and modulus, there is still room for improvement in corrosion resistance, lightweighting, and integration with other functions. Especially in extreme environments such as the deep sea, higher requirements are placed on the comprehensive performance of materials.

[0014] Reason: Existing technologies fail to fully consider the special needs of marine engineering, such as deep-sea high pressure, seawater corrosion, etc. At the same time, further efforts are needed to optimize material formulation and preparation process to maximize the comprehensive performance of materials.

[0015] 4. The preparation process is complicated and costly.

[0016] Current state of the art: The preparation process of carbon fiber composite materials is relatively complex, requiring high-precision equipment and strict process control, which not only increases the difficulty and cycle of production, but also increases production costs.

[0017] Reason: The preparation of carbon fiber composite materials involves multiple links, such as fiber pretreatment, resin formulation, molding process, etc. Each link requires fine control to ensure the quality and performance of the final product. However, this high requirement also leads to the complexity of the preparation process and the increase of cost. Summary of the invention

[0018] The purpose of the present invention is to provide a method and device for preparing carbon fiber composite material reinforcement for marine engineering, so as to improve the toughness of the material, enhance the level of intelligent monitoring, optimize the comprehensive performance of the material, and reduce the complexity and cost of the preparation process.

[0019] The above technical objectives of the present invention are achieved through the following technical solutions:

[0020] A preparation device for carbon fiber composite material tendons for marine engineering, comprising a carbon fiber creel, a glue injection device, a yarn collection hole, a preforming mold, a winding device, a curing mold, an unwinding machine, a traction machine, a cutting machine, and a winding machine. The winding device comprises a winding machine, a rotating disk, and a winding disk.

[0021] A fiber oven for the carbon fiber filaments to pass through is arranged between the carbon fiber creel and the glue injection device;

[0022] An optical fiber pay-off reel is provided between the fiber drying oven and the glue injection device;

[0023] The glue injection device is a cylindrical linear glue injection box, the top of which is connected to a resin pre-storage box, and the two ends of which are respectively connected to a yarn separation plate 1 and a yarn separation plate 2. The middle of the yarn separation plate 1 and the yarn separation plate 2 are provided with fiber holes, and the edges are circumferentially provided with fiber holes.

[0024] By adopting the above technical scheme, the carbon fiber filaments are baked in a fiber oven to volatilize part of the impregnating agent in the carbon fiber. After being impregnated with resin, the bonding between the carbon fiber filaments and the resin can be improved, thereby improving the compression and bending properties of the carbon fiber composite tendons; optical fibers are added to the carbon fiber composite tendons, and the stress, strain, temperature and other parameters of the composite materials are monitored in real time through optical fiber sensing technology; the optical fiber passes through the optical fiber hole with a certain tension, and then converges with the carbon fiber filaments at the yarn collecting hole, which can ensure that the optical fiber remains absolutely centered in the carbon fiber composite tendons to ensure the stability of the optical fiber detection data; uniform fiber holes are opened on the first and second sides of the yarn dividing plate, and used in conjunction with the cylindrical linear glue injection box, firstly, the hairiness of the carbon fiber filaments caused by bending and the loss of mechanical properties are reduced; secondly, the cylindrical The middle of the linear glue injection box is a hollow cylinder. In this way, the amount of epoxy resin used is greatly reduced. Basically, the epoxy resin used is always new glue. There will be no small amount of glue used in the pultrusion process, and the back and forth circulation will not cause the epoxy resin to age and increase the viscosity, which will affect the effect of epoxy resin impregnation of the fiber, and then affect the Tg and mechanical properties of the carbon fiber composite material tendons. The pultrusion speed of this device can be increased from 300mm / min to 700mm / min; adding a pre-forming mold after the yarn collecting hole can further regularize the fiber bundle and play a role in squeezing glue, squeezing out excess glue and reducing the glue squeezing pressure at the mold mouth; the winding disk can adjust the angle, and the winding machine can adjust the frequency. The two work together to produce high-toughness optical fiber intelligent carbon fiber composite material tendons with continuous threads on the surface of different pitches.

[0025] Preferably, a liquid level observation tube is connected between the resin pre-storage box and the cylindrical linear glue injection box.

[0026] By adopting the above technical scheme, the amount of glue added can be adjusted at any time according to the consumption of epoxy resin, and the amount of resin in the cylindrical linear glue injection box can be kept stable, thereby ensuring the stability of the carbon fiber composite material reinforcement production process.

[0027] Preferably, a glue groove is provided below the cylindrical linear glue injection box, the opening of the glue groove faces upward and is located below the entrance of the cylindrical linear glue injection box, the yarn collecting hole, the preforming mold, the winding device and the curing mold, the glue groove is connected to a resin tube, the end of the resin tube is connected to the resin pre-storage box, and the resin tube is connected to a vacuum pump.

[0028] By adopting the above technical scheme, the glue squeezed out from the solidifying mold mouth and the glue flowing out from the front and rear yarn dividing plates 1 and 2 of the empty cylindrical linear glue injection box flow into the glue tank below, and the resin in the glue tank is pumped into the resin pre-storage box by a vacuum pump.

[0029] Preferably, the resin tube is connected to the bottom of the glue groove, and the bottom surface of the glue groove is inclined downward near the tube opening of the resin tube.

[0030] By adopting the above technical solution, it can be ensured that the reflux glue is concentrated at the nozzle of the resin pipe, and the reflux glue liquid can be pumped out when the vacuum pump is working, thereby avoiding the situation where some resins are stagnated.

[0031] Preferably, the length of the curing mold is 800 mm, which is divided into a water cooling zone and three temperature zones, wherein the length of the water cooling zone is 100 mm, the length of the first temperature zone is 100 mm, the length of the second temperature zone is 300 mm, and the length of the third temperature zone is 300 mm.

[0032] Preferably, a water circulation system is provided at the front end of the curing mold.

[0033] By adopting the above technical solution, a water circulation system is added to the front end of the curing mold to reduce the mold inlet temperature of the curing mold, thereby reducing the thermal aging of the resin.

[0034] A method for preparing carbon fiber composite reinforcement for marine engineering, wherein the epoxy resin is modified by the following method:

[0035] Add 5-10 parts of special polyether polymer with active hydroxyl groups, 1-2 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.5-1 parts of foam breaking polymer and polysiloxane solution to 105 parts of epoxy curing agent, and stir for 3-5 minutes; then add 100 parts of epoxy resin and stir for another 10 minutes; then let it stand for 10 minutes to obtain modified high-toughness high-temperature epoxy resin.

[0036] By adopting the above technical solution, the modified high-toughness high-temperature epoxy resin is prepared, and the composite material prepared by combining it with carbon fiber filaments has significantly improved bending performance and fatigue performance.

[0037] Preferably, 8 parts of a special polyether polymer with active hydroxyl groups, 1.5 parts of a mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, and 0.8 parts of a foam-breaking polymer and polysiloxane solution are added, mixed thoroughly, and then mixed with a high-temperature epoxy resin.

[0038] By adopting the above technical solution, the carbon fiber composite material reinforcement made of modified high-toughness high-temperature epoxy resin is obtained, and various properties are optimal.

[0039] Preferably, step 1: pouring the modified high-toughness high-temperature epoxy resin prepared in claim 7 into a cylindrical linear glue injection box;

[0040] Step 2: Lead the carbon fiber filaments from the carbon fiber creel and enter the fiber oven. The temperature of the fiber oven is set at 140-220°C. After the carbon fiber filaments are led out of the fiber oven, they pass through the first yarn splitting plate together with the optical fiber. The carbon fiber filaments pass through the fiber hole outside the yarn splitting plate one and enter the cylindrical linear glue injection box, and then are led out from the yarn splitting plate two. The optical fiber passes through the optical fiber hole in the middle of the yarn splitting plate one and is led out from the optical fiber hole of the yarn splitting plate two. The carbon fiber filaments and the optical fiber converge at the yarn collecting hole to form a fiber bundle, and then pass through the preforming mold for glue extrusion;

[0041] Step 3: Then the fiber bundle passes through the center of the rotating disk, and the winding machine starts to work, winding the embossed tape on the surface of the fiber bundle; by adjusting the thickness and width of the wound embossed tape, the embossing depth and embossing width of the high-toughness optical fiber 32 intelligent carbon fiber composite material ribs are controlled; by adjusting the motor frequency of the winding machine, the pitch of the embossing on the surface of the rib material is controlled; by controlling the angle of the winding disk, the direction of the embossed tape is adjusted to form an angle α with the axis direction of the fiber bundle, and the value range of α is 50-70°;

[0042] Step 4: The fiber bundle with the embossed tape wrapped around its surface is pulled into a curing mold by a traction machine for curing, and is formed into a high-toughness optical fiber intelligent carbon fiber composite material rib with continuous threads on the surface;

[0043] Step 5: After the high-toughness optical fiber intelligent carbon fiber composite material ribs with continuous threads on the surface are completely cured by the curing mold, the embossed tape is wound off through the unwinder, and the composite material ribs with the embossed tape torn off are transported to the cutting machine under the action of the traction machine to cut the composite material ribs to a fixed length or to be wound through the winder.

[0044] Preferably, when it is necessary to produce smooth round ribs, the winding machine and the unwinding machine are stopped, and 2-5 carbon fibers are added to the carbon fiber creel for filling.

[0045] In summary, the present invention has the following beneficial effects:

[0046] 1. Improved material toughness. In view of the problem that existing carbon fiber composite materials are not tough enough in marine environments, the present invention significantly improves the toughness of composite materials by optimizing the material formula and preparation process. This includes improving the interfacial bonding between the fiber and the matrix, optimizing the arrangement of the fibers, and enhancing the toughness of the matrix, thereby ensuring that the composite materials can resist fatigue damage and fracture in complex marine environments, and improving the safety and service life of marine engineering structures.

[0047] 2. Improved the level of intelligent monitoring. In order to make up for the shortcomings of existing marine engineering structure monitoring methods, the present invention combines optical fiber sensing technology with carbon fiber composite materials to achieve intelligent monitoring of composite materials. By embedding optical fiber sensors in the composite material ribs, key parameters such as stress, strain, and temperature of the structure can be monitored in real time, and with the help of advanced data transmission and processing technology, accurate assessment and early warning of the health status of marine engineering structures can be achieved. This helps to improve operation and maintenance efficiency, reduce operation and maintenance costs, and ensure the safe operation of marine engineering structures.

[0048] 3. Optimized the comprehensive performance of the material. In view of the shortcomings of existing carbon fiber composite materials in terms of corrosion resistance, light weight and integration with other functions, the present invention comprehensively improves the comprehensive performance of the composite material by optimizing the material formula and preparation process. This includes enhancing the corrosion resistance of the material to cope with the corrosion challenges in extreme environments such as the deep sea; reducing the weight of the material to reduce the dead weight and construction cost of marine engineering structures; and realizing the integration of materials with other functions, such as electrical conductivity and thermal conductivity, to meet the diverse needs of the marine engineering field.

[0049] 4. Reduced the complexity and cost of the preparation process. In view of the problem that the existing carbon fiber composite material preparation process is complicated and costly, the present invention is committed to simplifying the preparation process and reducing production costs. By adopting innovative preparation processes and equipment, production efficiency is improved, production cycle is reduced, and the requirements for high-precision equipment and strict process control are reduced. This will help promote the widespread application of carbon fiber composite materials in the field of marine engineering and promote the progress and development of marine engineering technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of the preparation device;

[0051] Figure 2 It is a cross-sectional view of a cylindrical linear injection box;

[0052] Figure 3 1 is a schematic diagram of the structure of the yarn separation plate 1 and the yarn separation plate 2;

[0053] Figure 4 It is a schematic diagram of the structure of threaded reinforcement;

[0054] Figure 5It is a structural schematic diagram of a preparation device in the prior art.

[0055] In the figure, 1, carbon fiber creel; 11, carbon fiber filament; 2, fiber drying oven; 3, optical fiber pay-off drum; 31, red light pen; 32, optical fiber; 4, cylindrical linear glue injection box; 401, yarn separation plate 1; 402, yarn separation plate 2; 42, optical fiber hole; 43, fiber hole; 44, glue tank; 45, vacuum pump; 46, resin tube; 47, resin pre-storage box; 48, liquid level observation tube; 5, yarn collection hole; 51, pre-forming mold; 6, winding machine; 61, winding disk; 62, rotating disk; 7, curing mold; 71, water circulation system; 8, unwinding machine; 9, traction machine; 10, cutting machine; 12, winder. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0057] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0058] This specific embodiment provides a device for preparing a carbon fiber composite material reinforcement for marine engineering, such as Figure 1 As shown, it includes a carbon fiber creel 1, a fiber oven 2, an optical fiber pay-off drum 3, a cylindrical linear glue injection box 4, a yarn collecting hole 5, a preforming mold 51, a winding machine 6, a rotating disk 62, a winding disk 61, a curing mold 7, an unwinding machine 8, a traction machine 9, a cutting machine 10, and a winding machine 12 which are arranged in sequence.

[0059] A carbon fiber creel 1 is provided with carbon fiber filaments 11, which take the carbon fiber creel 1 as a starting point and sequentially pass through a fiber drying oven 2, a cylindrical linear glue injection box 4, a yarn collecting hole 5, a preforming mold 51, a rotating disk 62, a curing mold 7, an unwinding machine 8, a traction machine 9, a cutting machine 10, and a winding machine 12.

[0060] The optical fiber pay-off drum 3 has an optical fiber 32, and the optical fiber 32 takes the optical fiber pay-off drum 3 as the starting point and passes through the fiber drying oven 2, the cylindrical linear glue injection box 4, the yarn collecting hole 5, the preforming mold 51, the rotating disk 62, the curing mold 7, the unwinding machine 8, the traction machine 9, the cutting machine 10, and the winding machine 12 in sequence.

[0061] The optical fiber pay-off drum 3 is provided with a red light pen 31, which is connected to the optical fiber 32 and is used to detect the path of the optical fiber 32. The red light pen 31 can be set at the front end or the rear end of the optical fiber 32, and can monitor the effectiveness of the optical fiber 32 in real time. In other embodiments, the red light pen 31 can be set on the winder 12.

[0062] The cylindrical linear glue injection box 4 is transparent and hollow, and its cross section is as follows: Figure 2 As shown, the annular portion stores epoxy resin. The two ends of the cylindrical linear injection box 4 are respectively provided with Figure 3 The yarn separating plate 1 401 and the yarn separating plate 2 402 are shown. The center of the yarn separating plate 1 401 and the yarn separating plate 2 402 is a fiber hole 42, which is connected to the hollow area of ​​the cylindrical linear glue injection box 4; two circles of fiber holes 43 are opened along the circumference of the edge, which are connected to the annular area of ​​the cylindrical linear glue injection box 4.

[0063] A resin pre-storage box 47 and a glue tank 44 are respectively arranged above and below the cylindrical linear glue injection box 4. A resin tube 46 is connected to the bottom of the glue tank 44, and the resin tube 46 is connected to the top of the resin pre-storage box 47. A vacuum pump 45 is connected to the resin tube 46 to transport the epoxy resin in the glue tank 44 to the resin pre-storage box 47. A liquid level observation tube 48 is connected between the cylindrical linear glue injection box 4 and the resin pre-storage box 47. The resin pre-storage box 47 and the liquid level observation tube 48 above the cylindrical linear glue injection box 4 can adjust the amount of glue added at any time according to the resin consumption, and can also ensure that the amount of resin in the transparent hollow linear glue injection box remains stable, thereby ensuring the stability of the carbon fiber composite material reinforcement production process.

[0064] The opening of the glue groove 44 is located below the entrance of the cylindrical linear glue injection box 4, the yarn collecting hole 5, the preforming mold 51, and the curing mold 7, and is used to receive the extruded or dripping epoxy resin. The bottom surface of the glue groove 44 is slightly inclined, which can ensure that the refluxed epoxy resin is concentrated at the nozzle of the resin tube 46. When the vacuum pump 45 is working, the refluxed glue can be pumped out to avoid the stagnation of some resin.

[0065] The length of the curing mold 7 is 800-1100mm, which is divided into a water cooling area and three temperature areas, wherein the length of the water cooling area is 100mm, the length of the first temperature area is 100mm, the length of the second temperature area is 300mm, and the length of the third temperature area is 300mm. The temperature of the curing mold 7 is set according to the curing temperature of the resin glue, the first temperature area is 140-160°C, the second temperature area is 150-170°C, and the third temperature area is 190-210°C. A water circulation system is added to the front end of the curing mold 7 to reduce the temperature of the inlet of the curing mold 7, thereby reducing the heat aging of the resin.

[0066] This specific embodiment also provides a method for preparing a carbon fiber composite material rib for marine engineering, comprising the following steps:

[0067] Step 1: Add 5-10 parts of special polyether polymer with active hydroxyl groups, 1-2 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.5-1 parts of foam breaking polymer and polysiloxane solution to 105 parts of epoxy curing agent, and stir for 3-5 minutes; then add 100 parts of epoxy resin and stir for another 10 minutes; then let it stand for 10 minutes, and pour it into the transparent hollow cylindrical linear injection box 4. In this way, a modified high-toughness high-temperature epoxy resin system is prepared, and the composite material obtained after combining with carbon fiber has significantly improved bending performance and fatigue performance.

[0068] Step 2: The carbon fiber filament 11 is led out from the carbon fiber creel 1 and enters the fiber oven 2, and the temperature of the fiber oven 2 is set at 140-220°C; the optical fiber pay-off drum 3 is placed between the fiber oven 2 and the transparent hollow cylindrical straight glue injection box 4, and the optical fiber 32 has a certain tension. After the carbon fiber filament 11 is led out from the fiber oven 2, it passes through the first yarn splitting plate 401 together with the optical fiber 32. The optical fiber 32 passes through the optical fiber hole 42 in the middle of the yarn splitting plate 401 and is led out from the optical fiber hole 42 of the second yarn splitting plate 402. The carbon fiber filament 11 passes through the fiber hole 43 from the outer periphery of the yarn splitting plate 401 for two circles and enters the cylindrical straight glue injection box 4, and then is led out from the second yarn splitting plate 402, and converges with the optical fiber 32 to the yarn collection hole 5 to form a fiber bundle, and then passes through the preforming mold 51 for glue extrusion. Adding the preforming step after the yarn collection hole 5 can further regularize the fiber technique and play a role in glue extrusion, squeeze out the excess glue, and reduce the die mouth glue extrusion pressure of the curing mold 7. After the carbon fiber filaments 11 are baked in the fiber oven 2, part of the impregnating agent in the carbon fiber can be volatilized. After being impregnated with resin, the binding property of the carbon fiber filaments 11 and the resin can be improved, thereby improving the compression and bending properties of the carbon fiber composite material tendons. Optical fiber 32 is added to the carbon fiber composite material tendons, and the stress, strain, temperature and other parameters of the composite material are monitored in real time through the optical fiber 32 sensing technology. A 0.5-1.5mm optical fiber hole 42 is reserved in the center of the yarn separation plate 1 401 and the yarn separation plate 2 402. The optical fiber 32 passes through it with a certain tension, and then converges with the carbon fiber filaments 11 at the yarn collection hole 5, which can ensure that the optical fiber 32 remains absolutely centered in the carbon fiber composite material tendons to ensure the stability of the optical fiber 32 detection data. Evenly open two circles of fiber holes 43 on the sides of the yarn separation plate 1 401 and the yarn separation plate 2 402, and use them in conjunction with the cylindrical linear glue injection box 4, first reducing the hairiness of the carbon fiber filaments due to bending and the problem of mechanical property loss. Secondly, the cylindrical linear glue injection box 4 is hollow in the middle, so the amount of resin used is greatly reduced, and the resin used is basically always in a new glue state. It will not happen that the amount of glue used in the pultrusion process is small, and it circulates back and forth, causing the resin to age and increase viscosity, affecting the effect of resin impregnation of the fiber, and further affecting the Tg and mechanical properties of the carbon fiber composite material tendons. Using this production process, the pultrusion speed can be increased from 300mm / min to 700mm / min.

[0069] Step 3: The fiber bundle then passes through the center of the rotating disk 62 and is prepared as follows: Figure 4 When the threaded rib is formed, the winding machine 6 starts to work, and the embossed tape is wound on the surface of the fiber bundle. By adjusting the thickness and width of the wound embossed tape, the embossing depth and embossing width of the high-toughness optical fiber 32 intelligent carbon fiber composite material rib are controlled; by adjusting the motor frequency of the winding machine 6, the pitch of the embossing on the rib surface is controlled; by controlling the angle of the winding disk 61, the embossed tape direction is adjusted to form an angle α with the axis direction of the fiber bundle, and the value range of α is 50-70°.

[0070] Step 4: The fiber bundle with the embossed tape wrapped on the surface is pulled into the curing mold 7 by the traction machine 9 for curing, and can be shaped into a high-toughness optical fiber intelligent carbon fiber composite material rib with continuous threads on the surface. The fiber bundle and the embossed tape wrapped on the surface enter the curing mold 7 together, are in close contact with the curing mold 7, and are cured and formed in the mold. The product after demolding is consistent with the mold cross-section, has standard size, and has high precision, which is different from traditional composite material threaded ribs.

[0071] Step 5: After the high-toughness optical fiber intelligent carbon fiber composite material ribs with continuous threaded shapes on the surface are completely cured by the curing mold 7, they are passed through the unwinding machine 8 to unwind the embossed tape wrapped around the surface of the ribs when entering the mold. The embossed tape is added before entering the mold and torn off after curing. The carbon fiber ribs are only slightly bent, but not damaged, and the tensile strength and modulus are not reduced much. The fiber can also be tightly squeezed with the curing mold 7, and it is completely cured after leaving the mold, so that the size of the prepared ribs is more accurate. The ribs with the embossed tape torn off pass through the traction machine 9, and under the action of the traction machine 9, they are transferred to the cutting machine 10, and the ribs are cut to a fixed length or reeled through the reel 12. The red light pen 31 is connected to the optical fiber pay-off drum 3 and connected to the optical fiber 32, so that the optical fiber 32 path detection can be performed at any time.

[0072] The embossed tape is added before the carbon fiber bundle enters the curing mold 7, and is removed after complete curing. A uniform indentation is left on the surface of the carbon fiber composite reinforcement. The fiber is only slightly bent during the molding process, which has little effect on the product performance. However, the uniform indentation left on the surface can greatly improve the bonding strength with anchoring materials such as concrete; while not losing the excellent performance of the carbon fiber, the connection problem with anchoring materials such as concrete is solved. In addition, the fiber is tightly squeezed with the curing mold 7, and is completely cured after exiting the mold, so the size of the composite reinforcement produced is more precise.

[0073] When it is necessary to produce smooth round ribs (i.e. ribs without threads on the surface), it is only necessary to stop the winding machine 6 and add 2-5 carbon fibers to the carbon fiber creel 1 for filling.

[0074] The glue squeezed out from the entrance of the curing mold 7 and the glue flowing out from the front and rear yarn dividing plate 1 401 and the yarn dividing plate 2 402 of the cylindrical linear glue injection box 4 flow into the glue groove 44 below. The resin in the glue groove 44 is pumped into the resin pre-storage box 47 by the vacuum pump 45. The remaining glue in the transparent hollow cylindrical linear glue injection box 4 can be observed in real time through the liquid level observation tube 48 connected to the transparent hollow cylindrical linear glue injection box 4.

[0075] The modified high-toughness high-temperature epoxy resin ratio scheme disclosed in this embodiment is compared with the conventional high-temperature epoxy resin scheme. The high-toughness high-temperature epoxy resin ratio scheme used is as follows:

[0076] Solution 1: Add 5 parts of special polyether polymer with active hydroxyl groups, 1 part of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.5 parts of foam breaking polymer and polysiloxane solution to the high-temperature epoxy curing agent, mix them thoroughly, and then mix with the high-temperature epoxy resin to obtain a modified high-toughness high-temperature epoxy resin system.

[0077] Solution 2: Add 8 parts of special polyether polymer with active hydroxyl groups, 1.5 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.8 parts of foam breaking polymer and polysiloxane solution to the high-temperature epoxy curing agent, mix thoroughly, and then mix with the high-temperature epoxy resin to obtain a modified high-toughness high-temperature epoxy resin system.

[0078] Solution 3: Add 10 parts of special polyether polymer with active hydroxyl groups, 2 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 1 part of foam breaking polymer and polysiloxane solution to the high temperature epoxy curing agent, mix them thoroughly, and then mix with the high temperature epoxy resin to obtain a high temperature modified high toughness epoxy resin system.

[0079] The experimental data are as follows:

[0080]

[0081] Analyzing the data in the above table, we can see that:

[0082] 1. The porosity of carbon fiber composite reinforcement made of modified high-toughness high-temperature epoxy resin is significantly reduced, the bending performance and tensile fatigue performance are significantly improved, and other conventional mechanical properties are also improved;

[0083] 2. The more the modifying agent is added, the Tg and compression force will begin to decrease, and the fatigue performance will improve;

[0084] 3. The carbon fiber composite reinforcement made of high-toughness high-temperature epoxy resin modified by Scheme 2 has the best performance.

[0085] The preparation device in the prior art is as follows Figure 5 As shown, the main difference between the device disclosed in this specific embodiment and the device is that a fiber oven 2 is added to the device, and a cylindrical linear glue injection box 4 is adopted; while the prior art does not have a fiber oven 2, and the glue injection equipment adopted is generally a V-shaped glue dipping tank 44.

[0086] Experiments were conducted using the preparation device in the prior art and the present preparation device, and the experimental results are as follows:

[0087]

[0088] Analyzing the data in the above table, we can see that:

[0089] 1. The carbon fiber composite material ribs made by using the cylindrical linear injection box 4 have significantly improved Tg performance and greatly reduced fiber fluff, and the pultrusion speed can be increased without reducing performance;

[0090] 2. The mechanical properties and fatigue properties of the carbon fiber composite reinforcement made by using the cylindrical linear injection box 4 are improved;

[0091] 3. The carbon fiber composite reinforcement produced by the fiber-free oven 2 has a high porosity, and low compression force, bending performance, and fatigue performance.

Claims

1. A device for preparing carbon fiber composite reinforcement for marine engineering, It is characterized in that The invention comprises a carbon fiber yarn frame (1), a glue injection device, a yarn collecting hole (5), a preforming mold (51), a winding device, a curing mold (7), an unwinding machine (8), a traction machine (9), a cutting machine (10), and a winding machine (12); the winding device comprises a winding machine (6), a rotating disk (62), and a winding disk (61). A fiber oven (2) for the carbon fiber filaments (11) to pass through is arranged between the carbon fiber creel (1) and the glue injection device; An optical fiber pay-off drum (3) is provided between the fiber drying oven (2) and the glue injection device; The glue injection device is a cylindrical linear glue injection box (4), the top of which is connected to a resin pre-storage box (47), and the two ends of which are respectively connected to a yarn separation plate 1 (401) and a yarn separation plate 2 (402), wherein the middle of the yarn separation plate 1 (401) and the yarn separation plate 2 (402) are provided with a fiber hole (42), and the edge is provided with a fiber hole (43) circumferentially.

2. A device for preparing carbon fiber composite material reinforcement for marine engineering according to claim 1, It is characterized in that A liquid level observation tube (48) is connected between the resin pre-storage box (47) and the cylindrical linear glue injection box (4).

3. A device for preparing carbon fiber composite material reinforcement for marine engineering according to claim 2, It is characterized in that A glue groove (44) is provided below the cylindrical straight glue injection box (4). The opening of the glue groove (44) faces upward and is located below the entrances of the cylindrical straight glue injection box (4), the yarn collecting hole (5), the preforming mold (51), the winding device, and the curing mold (7). The glue groove (44) is connected to a resin tube (46). The end of the resin tube (46) is connected to a resin pre-storage box (47). The resin tube (46) is connected to a vacuum pump (45).

4. A device for preparing carbon fiber composite material reinforcement for marine engineering according to claim 3, It is characterized in that The resin tube (46) is connected to the bottom of the glue groove (44), and the bottom surface of the glue groove (44) is inclined downward near the tube opening of the resin tube (46).

5. The device for preparing carbon fiber composite material reinforcement for marine engineering according to claim 1, It is characterized in that The curing mold (7) is 800 mm long and is divided into a water cooling zone and three temperature zones, wherein the water cooling zone is 100 mm long, the first temperature zone is 100 mm long, the second temperature zone is 300 mm long, and the third temperature zone is 300 mm long.

6. The device for preparing carbon fiber composite material reinforcement for marine engineering according to claim 1, It is characterized in that A water circulation system (71) is provided at the front end of the curing mold (7).

7. A method for preparing carbon fiber composite reinforcement for marine engineering. It is characterized in that The epoxy resin was modified by the following method: Add 5-10 parts of special polyether polymer with active hydroxyl groups, 1-2 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.5-1 parts of foam breaking polymer and polysiloxane solution to 105 parts of epoxy curing agent, and stir for 3-5 minutes; then add 100 parts of epoxy resin and stir for another 10 minutes; then let it stand for 10 minutes to obtain modified high-toughness high-temperature epoxy resin.

8. The method for preparing a carbon fiber composite reinforcement for marine engineering according to claim 7, It is characterized in that Add 8 parts of special polyether polymer with active hydroxyl groups, 1.5 parts of mixed solution containing synthetic resin, glyceride, organic acid derivative and organic phosphate copolymer, 0.8 parts of foam breaking polymer and polysiloxane solution, mix thoroughly, and then mix with high-temperature epoxy resin.

9. The method for preparing a carbon fiber composite reinforcement for marine engineering according to claim 7, It is characterized in that Using the preparation device according to any one of claims 1 to 6, comprising the following steps: Step 1: pouring the modified high-toughness high-temperature epoxy resin prepared according to claim 7 into a cylindrical linear glue injection box (4); Step 2: The carbon fiber filaments (11) are led out from the carbon fiber creel (1) and enter the fiber oven (2), and the temperature of the fiber oven (2) is set at 140-220°C; after the carbon fiber filaments (11) are led out from the fiber oven (2), they pass through the first yarn splitting plate (401) together with the optical fiber (32), and the carbon fiber filaments (11) enter the cylindrical linear glue injection box from the outer periphery of the yarn splitting plate (401) through the fiber hole (43), and then are led out from the second yarn splitting plate (402), and the optical fiber (32) passes through the middle fiber hole (42) of the yarn splitting plate (401), and is led out from the fiber hole (42) of the second yarn splitting plate (402), and the carbon fiber filaments (11) and the optical fiber (32) converge to the yarn collecting hole (5) to form a fiber bundle, and then pass through the preforming mold (51) for glue extrusion; Step 3: The fiber bundle then passes through the center of the rotating disk (62), and the winding machine (6) starts to work, winding the embossed tape on the surface of the fiber bundle; by adjusting the thickness and width of the wound embossed tape, the embossing depth and embossing width of the high-toughness optical fiber intelligent carbon fiber composite material ribs are controlled; by adjusting the motor frequency of the winding machine (6), the pitch of the embossing on the surface of the rib material is controlled; by controlling the angle of the winding disk (61), the direction of the embossed tape is adjusted to form an angle α with the axial direction of the fiber bundle, and the value range of α is 50-70°; Step 4: The fiber bundle with the embossed tape wrapped around its surface is pulled into a curing mold (7) by a traction machine (9) for curing, and is formed into a high-toughness optical fiber intelligent carbon fiber composite material rib with continuous threads on its surface; Step 5: After the high-toughness optical fiber intelligent carbon fiber composite material rib with continuous threads on the surface is completely cured by the curing mold (7), the embossed tape is wound off by the unwinding machine (8), and the composite material rib with the embossed tape torn off is transferred to the cutting machine (10) under the action of the traction machine (9) to cut the composite material rib to a fixed length or to be wound by the winding machine (12).

10. The method for producing a carbon fiber composite reinforcement for marine engineering according to claim 9, It is characterized in that When it is necessary to produce smooth round ribs, the winding machine (6) and the unwinding machine (8) are stopped, and 2 to 5 carbon fibers are added to the carbon fiber creel (1) for filling.

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