FRP bar cage, production equipment and manufacturing method

Abstract

The application relates to a concrete reinforcement cage, discloses an FRP reinforcement cage, a production device and a manufacturing method, the FRP reinforcement cage comprises FRP reinforcements which are cross-connected with each other, the FRP reinforcement comprises a plurality of reinforced fiber layers which are covered by resin, the reinforced fiber layers with different directions at the cross-connection points of the FRP reinforcement are staggered layer by layer, and the FRP reinforcement is integrally formed by being covered by the resin, so that the FRP reinforcement cage has the advantages of high structural stability. The production device of the FRP reinforcement cage comprises a composite fiber forming device, a fiber bundle conveying device, a movable workbench, a resin impregnation device, a resin-impregnated fiber output device and a reinforcement cage forming roller, the resin-impregnated fiber output device comprises an output guide frame and a grouping guide roller, different numbers of composite reinforced fiber bundles can be grouped and combined, FRP reinforcement layer bundles which are distributed at intervals are formed, and the FRP reinforcement cage has the advantages of high manufacturing efficiency and convenient parameter adjustment. The application further discloses a manufacturing method of the FRP reinforcement cage.

Description

Technical Field

[0001] This application relates to concrete reinforcing cages, specifically to an FRP (fiberglass reinforced plastic) reinforcing cage. This application also relates to FRP reinforcing cage production equipment and a method for manufacturing FRP reinforcing cages. Background Technology

[0002] In concrete construction, to overcome the low tensile strength of concrete, reinforcing cages are typically placed within the concrete. These cages confine the concrete, improving its tensile strength. Reinforcing cages are usually formed by the crisscrossing of reinforcing bars, possessing strong tensile properties and working in conjunction with the concrete structure to create reinforced concrete structures with excellent compressive and tensile strength. Reinforcing cages effectively improve the mechanical properties of concrete structures and are widely used in concrete construction.

[0003] The use of steel reinforcement in reinforced concrete structures also presents several challenges, such as its heavy weight, poor durability in corrosive environments, and interference with electromagnetic waves. In particular, reinforced concrete structures built in marine environments experience accelerated corrosion of the steel reinforcement due to the continuous intrusion of chloride ions from seawater and sea fog, leading to a decrease in tensile strength and severely impacting the durability of the construction project. Therefore, in specific application environments, FRP (fiberglass reinforced plastic) cages are often used instead of steel reinforcement cages in concrete structures to improve the tensile strength of concrete engineering structures. These cages offer advantages such as light weight, good durability, and no interference with electromagnetic waves.

[0004] The existing fabrication of FRP (fiberglass reinforced plastic) cages typically involves first adding resin adhesive to the reinforcing fiber bundles, then using a mold to create FRP longitudinal bars and FRP stirrups, and finally binding the FRP longitudinal bars and FRP stirrups together to form the FRP cage. Since the binding of the FRP longitudinal bars and FRP stirrups usually does not utilize metal structures, the binding process is relatively complex and the binding reliability is poor, affecting the stability of the FRP cage structure. Summary of the Invention

[0005] To improve the stability of FRP (fiberglass reinforced plastic) cage structures, this application provides an FRP cage, production equipment, and manufacturing method.

[0006] The FRP reinforcing cage provided in this application adopts the following technical solution:

[0007] An FRP reinforcement cage includes intersecting FRP ribs, each FRP rib comprising a plurality of resin-coated reinforcing fiber layers. At the intersection points of the FRP ribs, the reinforcing fiber layers with different orientations are interlaced layer by layer and coated with resin to form an integral structure.

[0008] By adopting the above technical solution, the reinforcing fiber layers in FRP bars with different orientations are arranged in an alternating manner to form connection points between intersecting FRP bars. This allows FRP bars with different orientations to be connected through their own structure at the connection points, avoiding the need for specific binding structures or connection clamps to connect FRP bars, simplifying the connection process and improving the accuracy of the connection point position. By using resin to coat the different reinforcing fiber layers at the intersection connection points of FRP bars, an integrated structure is formed between the FRP bars and the FRP bar intersection connection points after the resin cures. This makes the structural stability of the intersection connection points higher and avoids deviations in the FRP cage connection points formed by binding FRP bars, as well as offsets in the FRP cage connection points during transportation and use.

[0009] In one specific implementation, the reinforcing fiber layer comprises multiple composite reinforcing fiber bundles formed by a mixture of glass fiber, carbon fiber and polypropylene fiber.

[0010] By adopting the above technical solutions, the high tensile strength and strong corrosion resistance of glass fiber are used to ensure the tensile strength and corrosion resistance of the composite reinforced fiber bundle; the high tensile strength and high specific modulus of carbon fiber can improve the flexibility of the composite reinforced fiber bundle while ensuring its tensile strength; and the high strength and high elasticity of polypropylene fiber are beneficial for processing and shaping the composite reinforced fiber bundle, thereby improving its processing performance.

[0011] In one specific implementation, at least one fiber in the composite reinforcing fiber bundle is impregnated with a silane coupling agent.

[0012] By adopting the above technical solution, the composite reinforcing fiber formed by impregnating the fiber with silane coupling agent can form grafts on the surface of the fiber, improve the bonding strength of the interface between the composite reinforcing fiber and the resin, and improve the structural strength of the FRP reinforcement cage.

[0013] The FRP (fiberglass reinforced plastic) cage production equipment provided in this application adopts the following technical solution:

[0014] An FRP (Fiber Reinforcing Reinforced Polymer) cage production equipment is provided for producing the FRP cages disclosed in this application. The equipment includes a composite fiber forming device, a fiber bundle conveying device, a movable worktable, a resin impregnation device, a resin-impregnated fiber output device, and a cage forming roller. The composite fiber forming device is capable of extracting a set number of reinforcing fibers and mixing them to form a reinforcing fiber bundle. The fiber bundle conveying device is capable of conveying the composite reinforcing fiber bundle to the movable worktable. The movable worktable is disposed on one side of the cage forming roller and is capable of reciprocating along the axial direction of the cage forming roller. The resin impregnation device is disposed on the movable worktable and is capable of impregnating the composite reinforcing fiber bundle with resin. The resin-impregnated fiber output device is disposed on... On the movable worktable, and located between the resin impregnation device and the rib cage forming roller, the impregnated fiber output device includes an output guide frame and a grouping guide roller. The output guide frame is disposed on the side of the grouping guide roller adjacent to the resin impregnation device, and the output guide frame is provided with multiple fiber guiding grooves. The grouping guide roller is rotatably mounted on the movable worktable, and the grouping guide roller is provided with multiple sets of grouping guide teeth, which can group and merge different numbers of the composite reinforcing fiber bundles to form spaced FRP rib bundles. The rib cage forming roller can rotate at a set speed to wind the FRP rib bundles around the rib cage forming roller to form the FRP ribs.

[0015] By adopting the above technical solution, the reciprocating movement of the movable worktable on one side of the rib cage forming roller, in conjunction with the rotation of the rib cage forming roller, allows FRP rib bundles to be wound onto the rib cage forming roller in different directions and at different intervals, forming an FRP rib cage with multiple reinforcing fiber layers. The resin impregnation device allows resin to coat the periphery of the composite reinforcing fiber bundles, ultimately forming the resin-coated reinforcing fiber layer structure of the FRP rib cage. The grouping guide rollers allow different numbers of composite reinforcing fiber bundles to be grouped and merged to form spaced FRP rib bundles, thereby controlling the width of the FRP ribs in the FRP rib cage and the spacing between adjacent FRP ribs.

[0016] In one specific implementation, the resin impregnation device includes a fiber input mechanism, a resin impregnation tank, a fiber pressing impregnation mechanism, and a scraping mechanism. The fiber input mechanism is located at one end of the resin impregnation tank and includes an input guide plate and a comb-shaped guide strip. The input guide plate is located on the side of the comb-shaped guide strip away from the resin impregnation tank. The input guide plate is provided with a plurality of guide holes for the composite reinforcing fiber bundle to pass through. The comb-shaped guide strip includes a plurality of guide grooves for accommodating the composite reinforcing fiber bundle. The guide grooves correspond one-to-one with the guide holes. The fiber pressing impregnation mechanism is located at the resin impregnation tank and can restrict the composite reinforcing fiber bundle from passing through the resin impregnation tank. The scraping mechanism is located at the end of the resin impregnation tank opposite to the fiber input mechanism and can scrape off part of the resin in the composite reinforcing fiber bundle.

[0017] By adopting the above technical solution, multiple composite reinforcing fiber bundles can be guided separately using the input guide plate and comb-shaped guide strip, which is beneficial for independent impregnation treatment of multiple composite reinforcing fiber bundles and grouping and merging of different quantities; by using the fiber pressing impregnation mechanism and the scraping mechanism, the resin content impregnated into the composite reinforcing fiber bundles can be controlled, thereby controlling the ratio of composite reinforcing fiber bundles to resin in the FRP cage, and thus determining the mechanical properties of the FRP cage.

[0018] In one specific implementation, the fiber impregnation mechanism includes an impregnation mounting frame, a lifting and adjusting structure, a lifting mounting frame, a first pressure bar frame, a first pressure bar, a second pressure bar frame, a second pressure bar, an adjusting rod, and an amplitude adjustment structure. The impregnation mounting frame is fixed on both sides adjacent to the resin impregnation tank and the fiber input mechanism. The lifting mounting frame is mounted on the impregnation mounting frame via the lifting and adjusting structure, allowing the installation height of the lifting mounting frame to be adjusted. The first pressure bar frame and the second pressure bar frame are respectively hinged to the lifting mounting frame, with one end of each frame hinged to the adjusting rod. The other end of the first pressure bar frame is fixedly connected to the first pressure bar, and the other end of the second pressure bar frame is fixedly connected to the second pressure bar. The amplitude adjustment structure is disposed between the lifting mounting frame and the adjusting rod, allowing adjustment of the distance between them.

[0019] By adopting the above technical solution, the first and second pressure rods can be used to confine the reinforcing fiber bundle in the resin within the resin impregnation tank, allowing the resin to impregnate between the multiple reinforcing fibers of the reinforcing fiber bundle, forming a resin coating on the reinforcing fiber bundle. The lifting adjustment structure can be used to adjust the height of the first and second pressure rods, that is, to adjust the depth of the first and second pressure rods entering the resin impregnation tank, thereby ensuring that the reinforcing fiber bundle between the first and second pressure rods can be completely impregnated in the resin. The amplitude adjustment structure can be used to adjust the distance between the first and second pressure rods, thereby adjusting the length and impregnation time of the reinforcing fiber bundle in the resin, controlling the sufficiency and amount of resin impregnation in the reinforcing fiber bundle.

[0020] In one specific implementation, the glue-scraping mechanism includes a glue-scraping mounting frame, a glue-scraping base plate, a glue-scraping strip, a glue-pressing roller, a first glue-pressing rod, a second glue-pressing rod, a glue-pressing rod frame, and a pressure rod adjustment mechanism. The glue-scraping mounting frame is fixed to one end of the resin impregnation tank. The glue-scraping base plate is fixed to the lower part of the glue-scraping mounting frame and extends obliquely downward to the resin impregnation tank. The glue-scraping strip is installed above the glue-scraping base plate and can abut against the glue-scraping base plate. The glue-pressing roller is rotatably mounted on the glue-scraping mounting frame. The glue-pressing rod frame is mounted on the glue-scraping mounting frame through the pressure rod adjustment mechanism. The first and second glue-pressing rods are mounted on the glue-pressing rod frame and are located on both sides of the rotation axis of the glue-pressing roller.

[0021] By adopting the above technical solution, the glue scraper strip can initially scrape off the resin in the reinforcing fiber bundle, reducing the resin content in the reinforcing fiber bundle and preventing excessive resin pressed out by the pressure rod from re-permeating into the reinforcing fiber bundle; the pressure rod adjustment mechanism can adjust the pressure between the first and second pressure rods and the pressure roller, thereby controlling the resin content in the reinforcing fiber bundle after pressing by the first and second pressure rods; the glue scraper base plate can guide the resin scraped out of the reinforcing fiber bundle by the glue scraper strip, the first pressure rod, and the second pressure rod back into the resin impregnation tank, improving the resin utilization rate and reducing resin waste.

[0022] In one specific implementation, the composite fiber forming device includes fiber spool units, fiber bundle forming rings, and fiber bundle guide rods. There are multiple fiber spool units, each fiber spool unit is provided with multiple fiber spool storage positions, and a fiber guide is provided above each fiber spool storage position. The fiber bundle forming rings are disposed at one end of the multiple fiber spool units, and the number of fiber bundle forming rings corresponds to the number of fiber spool units. The fiber bundle guide rods are disposed on the side of the fiber bundle forming rings away from the fiber spool units, and include an upper guide rod and a lower guide rod arranged side by side.

[0023] By adopting the above technical solution, using multiple fiber shaft storage positions set on each fiber shaft holder unit and a guide above each fiber shaft storage position, a reinforcing fiber can be extracted from the fiber shaft placed at each fiber shaft storage position, ensuring that multiple reinforcing fibers are extracted independently and continuously; using multiple fiber shaft holder units and multiple fiber bundle forming rings on the composite fiber forming device, the multiple reinforcing fibers extracted from each fiber shaft holder unit can be combined to form multiple composite reinforcing fiber bundles; using the parallel upper guide rod and lower guide rod, the extraction force on the composite reinforcing fiber bundle can be buffered, ensuring the uniformity of the extraction speed of the composite reinforcing fiber bundle.

[0024] The FRP reinforcing cage fabrication method provided in this application adopts the following technical solution:

[0025] A method for manufacturing an FRP reinforcement cage, used to manufacture the FRP reinforcement cage provided in this application, includes the following steps: S10: merging multiple reinforcing fibers to form a composite reinforcing fiber bundle; S20: adding resin to the composite reinforcing fiber bundle to form an adhesive-coated reinforcing fiber bundle; S30: grouping and merging the adhesive-coated reinforcing fiber bundle to form an FRP reinforcement layer bundle; S40: reciprocatingly winding the FRP reinforcement layer bundle to form an FRP reinforcement layer formed by the intersection of the FRP reinforcement layer bundles; S50: repeatedly stacking and winding the FRP reinforcement layer bundle on the FRP reinforcement layer to form an FRP reinforcement cage formed by the cross connection of FRP reinforcements.

[0026] By adopting the above technical solution, FRP reinforcement layers containing different numbers of reinforcement fiber bundles can be formed by grouping and merging the adhesive-coated reinforcing fiber bundles, thereby obtaining FRP reinforcements of different widths. By reciprocating and intermittently winding the FRP reinforcement layer bundles, the reinforcing fiber layers can have different orientations and intersect each other, forming a connection structure at the intersection where the reinforcing fiber layers with different orientations are arranged in an alternating manner. By repeatedly stacking and winding the FRP reinforcement layer bundles on the FRP reinforcement layer, a structure in which the resin of the FRP reinforcement covers multiple reinforcing fiber layers can be formed, ensuring the structural strength of the FRP reinforcement cage and the stability of the connection structure.

[0027] In one specific implementation, the method of this application further includes the step of: S5: impregnating the reinforcing fiber with a silane coupling agent; in S10, the reinforcing fiber includes glass fiber, carbon fiber and polypropylene fiber.

[0028] By adopting the above technical solutions, the method of impregnating the reinforcing fibers with silane coupling agents can form grafts on the surface of the reinforcing fibers, improve the bonding strength of the interface between the composite reinforcing fiber bundle and the resin, and improve the structural strength of the FRP reinforcement cage. By mixing glass fiber, carbon fiber and polypropylene fiber together to form a composite reinforcing fiber bundle, the tensile strength of the composite reinforcing fiber bundle can be guaranteed while improving the flexibility of the composite reinforcing fiber bundle, thereby improving the processing performance of the composite reinforcing fiber bundle.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By utilizing the structure of multiple reinforcing fiber layers arranged in an alternating manner in FRP bars with different orientations, connections between FRP bars with different orientations can be formed without the aid of external binding wires or connecting devices. This eliminates the traditional process of binding and fixing FRP longitudinal bars and FRP stirrups in FRP cages, simplifies the processing of FRP cages, avoids deviations in fixing positions caused by manual binding, and improves the accuracy of FRP bar connection points and the stability of the connection structure.

[0031] 2. The FRP reinforcement formed by resin coating multiple reinforcing fiber layers and the integrated connection structure formed by resin coating reinforcing fiber layers with different orientations effectively improve the connection strength and stability of the connection structure at the connection point of the FRP reinforcement, and greatly ensure the mechanical properties of the FRP reinforcement cage.

[0032] 3. The grouping guide roller can be used to group and merge multiple composite reinforcing fiber bundles after impregnation, control the number of composite reinforcing fiber bundles in each reinforcing fiber layer and the spacing between adjacent FRP ribs, thereby enabling the production equipment of this application to produce FRP rib cages of different specifications, and improving the applicability of the production equipment of this application;

[0033] 4. The method of forming FRP reinforcement layers by reciprocating cross-winding of FRP reinforcement bundles can make the composite reinforcing fiber bundles in FRP reinforcement layers with different orientations cross each other, and through the repeated superposition of different FRP reinforcement layers, an FRP reinforcement cage composed of cross-connected FRP reinforcements is formed after the resin is cured. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of one embodiment of the FRP reinforcing cage of this application.

[0035] Figure 2 for Figure 1 Schematic diagram of the internal structure of the cross connection point of FRP reinforcement in section A.

[0036] Figure 3 This is a schematic diagram of one embodiment of the FRP (fiberglass reinforced plastic) cage production equipment of this application.

[0037] Figure 4 This is a schematic diagram of the impregnated fiber output device in one embodiment of the FRP reinforcing cage production equipment of this application.

[0038] Figure 5 This is a schematic diagram of the grouping guide rollers in one embodiment of the FRP rib cage production equipment of this application.

[0039] Figure 6 This is a schematic diagram of the resin impregnation device in one embodiment of the FRP reinforcing cage production equipment of this application.

[0040] Figure 7 This is a schematic diagram of the fiber impregnation mechanism in one embodiment of the FRP reinforcement cage production equipment of this application.

[0041] Figure 8 This is a schematic diagram of the glue scraping mechanism in one embodiment of the FRP reinforcing cage production equipment of this application.

[0042] Figure 9 This is a schematic diagram of the composite fiber forming device in one embodiment of the FRP reinforcing cage production equipment of this application.

[0043] Figure 10 This is a flowchart illustrating one embodiment of the FRP (fiberglass reinforced plastic) cage fabrication method of this application.

[0044] Explanation of reference numerals in the attached drawings: 1. FRP reinforcement; 11. Resin; 12. Reinforcing fiber layer; 2. Composite fiber forming device; 21. Fiber shaft frame unit; 211. Guide fiber; 22. Fiber bundle forming ring; 23. Fiber bundle guide rod; 231. Upper guide rod; 232. Lower guide rod; 3. Fiber bundle conveying device; 31. Fiber conveying frame; 32. Fiber conveying plate; 4. Moving worktable; 41. Platform guide rail; 5. Resin impregnation device; 51. Fiber input mechanism; 511. Input guide plate; 512. Comb-shaped guide strip; 52. Resin impregnation... 53. Fiber impregnation mechanism; 531. Impregnation mounting frame; 532. Lifting and adjusting structure; 533. Lifting mounting frame; 534. First pressure bar frame; 535. First pressure bar; 536. Second pressure bar frame; 537. Second pressure bar; 538. Adjusting rod; 539. Amplitude adjustment structure; 54. Scraping mechanism; 541. Scraping mounting frame; 542. Scraping base plate; 543. Scraping strip; 544. Pressure roller; 545. First pressure bar; 546. Second pressure bar; 547. Pressure bar frame; 548. Pressure bar adjusting mechanism; 6. Impregnated fiber output device; 61. Output guide frame; 611. Fiber guide groove; 62. Grouping guide roller; 621. Grouping guide teeth; 7. Rib cage forming roller; 71. Forming roller frame; 72. Rotary mounting base; 73. Rotary drive mechanism. Detailed Implementation

[0045] The specific embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features.

[0048] One embodiment of the FRP reinforcing cage of this application is as follows: Figure 1 and Figure 2 As shown, it is formed by intersecting and connecting FRP ribs 1 that are inclined in different directions. FRP ribs 1 inclined in the same direction can be a single spiral structure formed by the spiral extension of a single FRP rib 1, or a multi-spiral structure formed by the spiral extension of several FRP ribs 1. FRP ribs 1 inclined in different directions can also be formed by the same FRP rib 1 turning in different directions. Adjacent FRP ribs 1 are spaced apart, forming a gap of a predetermined distance between them. The intersecting and connecting FRP ribs 1 inclined in different directions forms a hollow, mesh-like FRP cage. The walls of the FRP cage are usually formed into a cylindrical shape, but can also be formed into other cylindrical structures such as square cylinders or polygonal cylinders.

[0049] The FRP reinforcement 1 is formed by encapsulating multiple reinforcing fiber layers 12 in resin 11. The resin 11 cures and connects the multiple reinforcing fiber layers 12 together to form an integral FRP reinforcement 1. In the FRP reinforcement 1, the extension direction of the fibers in the reinforcing fiber layers 12 is the same as the extension direction of the FRP reinforcement 1. At the intersection points between FRP reinforcements 1, the reinforcing fiber layers 12 from different inclined directions pass through the intersection point area along their original direction, and are arranged alternately layer by layer in the intersection point area. The resin 11 encapsulates the FRP reinforcement 1 and the reinforcing fiber layers 12 in the intersection point area, so that the intersection points of the FRP reinforcement 1 and the FRP reinforcement 1 form an integral structure. The resin 11 is usually epoxy resin, preferably epoxy resin with an epoxy value of 28-36, but vinyl ester resin or phenolic resin can also be used.

[0050] In this way, the FRP reinforcement 1 forms a connection between different FRP reinforcement 1 through its own structure, so that there is no need to use additional tie wires, clamps or connectors to fix the connection of FRP reinforcement 1. This not only facilitates the connection between FRP reinforcement 1, but also greatly improves the positional accuracy of the connection point of FRP reinforcement 1 and the stability of the connection structure by the integrated connection between FRP reinforcement 1 and the connection point.

[0051] The FRP reinforcement cage of this application is commonly used in concrete construction projects for the fabrication of concrete foundation piles, bridges, and buildings in special environments. In use, an FRP reinforcement cage of a predetermined shape and size is placed at the construction location, and concrete is injected. The concrete enters the interior of the FRP reinforcement cage through the mesh openings. The FRP reinforcement cage can constrain the concrete structure, improving its tensile strength. It not only reduces the self-weight of the concrete structure, improves its corrosion resistance, and reduces its susceptibility to electromagnetic waves, as is common with conventional FRP reinforcement cages, but also provides stable tensile force in different directions through the integral connection points formed between the FRP reinforcement bars, thus enhancing the multi-dimensional tensile strength of the concrete structure.

[0052] In some embodiments of the FRP reinforcing cage of this application, such as Figure 2 As shown, each reinforcing fiber layer 12 includes multiple composite reinforcing fiber bundles, which are impregnated and coated with resin 11, forming a layered structure in the resin 11. Each composite reinforcing fiber bundle is composed of a mixture of glass fiber, carbon fiber, and polypropylene fiber, with glass fiber being the most abundant, typically 70-90%, while carbon fiber and polypropylene fiber are used in smaller amounts, typically 5-15%.

[0053] In a preferred embodiment of the FRP reinforcing cage of this application, at least one fiber used in the composite reinforcing fiber bundle is impregnated with a silane coupling agent before use. Typically, glass fibers or polypropylene fibers can be impregnated with a silane coupling agent.

[0054] Specifically, dimethylimidazole and 3-aminopropyltriethoxysilane can be added to a 50 W / W % alcohol solution to form a 5% silane coupling agent solution. Glass fibers or polypropylene fibers are then soaked in the silane coupling agent solution for 30 minutes, removed, treated at 110°C for 2 hours, ultrasonically cleaned in acetone, and then air-dried before use.

[0055] The FRP (fiberglass reinforced plastic) cage production equipment of this application is used to produce the FRP cages provided in any embodiment of this application. One embodiment of the FRP cage production equipment of this application is as follows: Figure 3As shown, it includes a composite fiber forming device 2, a fiber bundle conveying device 3, a moving worktable 4, a resin impregnation device 5, an impregnated fiber output device 6, and a reinforcing cage forming roller 7.

[0056] The composite fiber forming apparatus 2 is used to extract the required number of reinforcing fibers from multiple fiber spools and mix the multiple reinforcing fibers together to form a composite reinforcing fiber bundle. The composite fiber forming apparatus 2 is usually located in a separate workspace away from the moving worktable 4, thereby reducing the escape of fiber dust generated during the extraction and mixing of multiple reinforcing fibers and preventing the inhalation of dust from harming the health of the operators.

[0057] A fiber bundle conveying device 3 is positioned between the composite fiber forming device 2 and the movable worktable 4. It is used to transfer the composite reinforcing fiber bundles formed by the composite fiber forming device 2 to the movable worktable 4 for subsequent processing. Typically, the fiber bundle conveying device 3 includes multiple fiber conveying frames 31 and fiber conveying plates 32 mounted on the fiber conveying frames 31. The fiber conveying frames 31 are spaced apart along the conveying path of the composite reinforcing fiber bundles from the composite fiber forming device 2 to the movable worktable 4. Each fiber conveying frame 31 has a fiber conveying plate 32 on its top, providing fixation and positioning for the fiber conveying plate 32. Multiple fiber bundle positioning holes are arranged in an array on the fiber conveying plates 32. Each composite reinforcing fiber bundle passes through a corresponding fiber bundle positioning hole on the multiple fiber conveying plates 32, ensuring smooth transfer of multiple composite reinforcing fiber bundles from the composite fiber forming device 2 to the movable worktable 4 and preventing the multiple composite reinforcing fiber bundles from tangling during the transfer process.

[0058] The movable worktable 4 is a platform disposed on one side of the reinforcing cage forming roller 7. The movable worktable 4 can reciprocate along the axial direction of the reinforcing cage forming roller 7, and is used to wind the resin-impregnated composite reinforcing fiber bundles onto different positions on the reinforcing cage forming roller 7 to form FRP reinforcing cages. Typically, a platform guide rail 41 parallel to the rotation axis of the reinforcing cage forming roller 7 is provided on the ground on one side of the reinforcing cage forming roller 7. The movable worktable 4 is mounted on the platform guide rail 41 and can reciprocate along the platform guide rail 41 under the action of a drive mechanism. By controlling the moving speed of the movable worktable 4, the spacing between the FRP ribs 1 in the manufactured FRP reinforcing cage can be controlled.

[0059] The resin impregnation device 5 is set on the movable worktable 4 and is used to impregnate the composite reinforcing fiber bundle with resin to form a glued reinforcing fiber bundle.

[0060] The resin-impregnated fiber output device 6 is set on the movable worktable 4 and located between the resin impregnation device 5 and the rib cage forming roller 7. It can group and merge multiple resin-impregnated reinforcing fiber bundles according to the design requirements of the FRP rib 1 width to form an FRP rib layer bundle that can be wound on the rib cage forming roller 7 to form a reinforcing fiber layer 12.

[0061] like Figure 4 As shown, the resin-impregnated fiber output device 6 includes an output guide frame 61 and a grouping guide roller 62, which are arranged side by side. The output guide frame 61 is located on the side of the grouping guide roller 62 adjacent to the resin impregnation device 5. The output guide frame 61 is provided with multiple fiber guide grooves 611. After being impregnated in the resin impregnation device 5, multiple bundles of resin-impregnated reinforcing fibers are guided by the output guide frame 61 and then enter the grouping guide roller 62 for grouping and merging. After reaching the output guide frame 61, each bundle of resin-impregnated reinforcing fibers passes through a fiber guide groove 611, thus conveying the multiple bundles of resin-impregnated reinforcing fibers to the grouping guide roller 62 in an alternating manner, facilitating independent processing of different bundles of resin-impregnated reinforcing fibers by the grouping guide roller 62.

[0062] The group guide rollers 62 are rotatably mounted on the movable worktable 4 via mounting brackets and can rotate under the drive of a servo motor or other drive device. Figure 5 As shown, the grouping guide roller 62 is provided with multiple sets of grouping guide teeth 621, typically 2-4 sets, each set positioned at a different radial position on the grouping guide roller 62. The adhesive-coated reinforcing fiber bundles conveyed from the output guide frame 61 pass beneath the grouping guide roller 62 and wind around the reinforcing cage forming roller 7. By controlling the rotation angle of the grouping guide roller 62, different groups of grouping guide teeth 621 can be rotated to their lower positions for grouping and merging the adhesive-coated reinforcing fiber bundles. The different groups of grouping guide teeth 621 are positioned at different axial positions on the grouping guide roller 62 and exhibit different axial offsets in the radial direction, enabling the merging of different numbers of adhesive-coated reinforcing fiber bundles to form FRP reinforcing layer bundles with a set width and distributed at set intervals.

[0063] The forming roller 7 is typically mounted on a forming roller frame 71, which is located at both ends of the forming roller 7. Rotary mounting seats 72 are provided on the forming roller frame 71, and are rotatably mounted on the forming roller frame 71. The rotary mounting seats 72 on the two forming roller frames 71 are arranged opposite each other. At least one forming roller frame 71 is equipped with a rotary drive mechanism 73, which is typically a drive motor and is driven by the rotary mounting seat 72. The two ends of the forming roller 7 are detachably fixed to the rotary mounting seats 72 and can rotate together with the rotary mounting seats 72 at a set speed under the drive of the rotary drive mechanism 73. By controlling the rotational speed of the forming roller 7 and the movable worktable 4, the position of the FRP rib bundles wound on the forming roller 7 can be controlled, thereby controlling the tilt direction, tilt degree, and helical spacing between the FRP ribs 1 formed by the multi-layer winding of the FRP rib bundles.

[0064] When the FRP rib bundles are wound onto the rib cage forming roller 7, several FRP rib bundles are typically output simultaneously from the grouping guide roller 62. The spacing between these FRP rib bundles is determined by the structure of the grouping guide roller 62. When the rib cage forming roller 7 rotates one revolution, the movement of the moving table 4 typically ensures that the FRP rib bundle wound on the rib cage forming roller 7 at the rearmost position in the moving direction of the moving table 4 is positioned a predetermined distance ahead of the FRP rib bundle wound on the rib cage forming roller 7 in the previous revolution. This predetermined distance is usually equal to the winding spacing of the several FRP rib bundles simultaneously output from the grouping guide roller 62 on the rib cage forming roller 7, thus ensuring that the spacing between each FRP rib 1 in the resulting FRP rib cage is equal.

[0065] Before winding the FRP reinforcement bundles, a release agent is typically applied to the reinforcement cage forming roller 7, or a release film is wrapped around it. This facilitates the removal of the completed FRP reinforcement cage from the forming roller 7 after all the FRP reinforcement bundles have been wound and the resin has cured. The structure where both ends of the reinforcement cage forming roller 7 are detachably fixed to the rotary mounting base 72 ensures that the roller 7 can be removed from the rotary mounting base 72. This not only facilitates the removal of the FRP reinforcement cage from the roller 7, but also allows the roller 7 to be removed and placed separately after all the FRP reinforcement bundles have been wound, awaiting resin curing. Another reinforcement cage forming roller 7 is then fixed to the rotary mounting base 72 for the production of the next FRP reinforcement cage, improving the production efficiency of the FRP reinforcement cage.

[0066] In a preferred embodiment of the FRP (fiberglass reinforced plastic) cage production equipment of this application, such as Figure 4 and Figure 6As shown, the resin impregnation device 5 includes a fiber input mechanism 51, a resin impregnation tank 52, a fiber pressing impregnation mechanism 53, and a scraping mechanism 54. The fiber input mechanism 51 is located at the end of the resin impregnation tank 52 away from the reinforcing cage forming roller 7. The fiber input mechanism 51 includes an input guide plate 511 and a comb-shaped guide bar 512. The comb-shaped guide bar 512 is located adjacent to the resin impregnation tank 52, and the input guide plate 511 is located on the side of the comb-shaped guide bar 512 away from the resin impregnation tank 52. The input guide plate 511 has multiple guide holes. Multiple composite reinforcing fiber bundles from the fiber bundle conveying device 3 each pass through one guide hole and reach the comb-shaped guide bar 512. The comb-shaped guide bar 512 has multiple upwardly extending comb teeth. A guide groove is formed between adjacent comb teeth. Multiple composite reinforcing fiber bundles each pass through one guide groove and enter the resin impregnation tank 52 for resin impregnation.

[0067] The resin impregnation tank 52 is a tank-shaped container set on the movable worktable 4 for holding liquid resin. The resin impregnation tank 52 can be set in various different shapes, usually rectangular. The comb-shaped guide bar 512 is set parallel to the short side of the rectangular resin impregnation tank 52, so that the composite reinforcing fiber bundle enters from one short side of the resin impregnation tank 52 and exits from the other short side, thereby extending the impregnation length and impregnation time of the composite reinforcing fiber bundle in the resin impregnation tank 52.

[0068] The fiber pressing and impregnation mechanism 53 is arranged across the resin impregnation tank 52 and is used to press the composite reinforcing fiber bundle into the resin impregnation tank 52 and pass through the interior of the liquid resin, so that the liquid resin fully impregnates the composite reinforcing fiber bundle to form a glued reinforcing fiber bundle.

[0069] The glue scraping mechanism 54 is located on the side edge of the resin impregnation tank 52, at the end opposite to the fiber input mechanism 51. The glue scraping mechanism 54 can scrape off part of the resin impregnated in the glue-coated reinforcing fiber bundle. On the one hand, it can prevent excessive resin from flowing out of the glue-coated reinforcing fiber bundle when it wraps around the rib cage forming roller 7, thus sealing the pores between the formed FRP ribs 1. On the other hand, it can control the ratio of composite reinforcing fiber bundle to resin in the formed FRP rib cage, so that the mass ratio of resin in the glue-coated reinforcing fiber bundle is 25-30%.

[0070] As one specific embodiment of the FRP (fiberglass reinforced plastic) cage production equipment of this application, such as Figure 7 As shown, the fiber impregnation mechanism 53 includes an impregnation mounting frame 531, a lifting adjustment structure 532, a lifting mounting frame 533, a first pressure bar frame 534, a first pressure bar 535, a second pressure bar frame 536, a second pressure bar 537, an adjustment rod 538, and an amplitude adjustment structure 539.

[0071] The pressure impregnation mounting frame 531 is fixed on both sides adjacent to the end where the resin impregnation tank 52 and the fiber input mechanism 51 are located. When the resin impregnation tank 52 is rectangular, the pressure impregnation mounting frame 531 is fixed on the movable worktable 4 on both sides of the long side of the pressure impregnation mounting frame 531. The lifting adjustment structure 532 is fixed on the pressure impregnation mounting frame 531. The two ends of the lifting mounting frame 533 are mounted on the lifting adjustment structure 532, and the height of the two ends of the lifting mounting frame 533 relative to the pressure impregnation mounting frame 531 can be adjusted by the lifting adjustment structure 532. The lifting adjustment structure 532 can be a threaded adjustment structure, a gear adjustment structure, a hydraulic adjustment structure, etc., and the lifting adjustment structure 532 can be adjusted manually or electrically.

[0072] A first pressure rod frame 534 and a second pressure rod frame 536 are hinged to both ends of the lifting mounting frame 533. Each end of the first pressure rod frame 534 and the second pressure rod frame 536 has a connecting groove. Fixing bolts pass through these grooves to connect the first pressure rod frame 534 and the second pressure rod frame 536 at each end of the lifting mounting frame 533 to the corresponding end of the adjusting rod 538. The other end of the first pressure rod frame 534 is fixedly connected to the first pressure rod 535, and the other end of the second pressure rod frame 536 is fixedly connected to the second pressure rod 537. This ensures that the first pressure rod 535 is fixedly connected between the first pressure rod frames 534 at both ends of the lifting mounting frame 533, and the second pressure rod 537 is fixedly connected between the second pressure rod frames 536 at both ends of the lifting mounting frame 533.

[0073] The middle section of the lifting mounting frame 533 is a connecting rod connecting the two ends. An amplitude adjustment structure 539 is located in the middle of the connecting rod and is connected to the middle of the adjusting rod 538. Similarly, the amplitude adjustment structure 539 can be a threaded adjustment structure, a gear adjustment structure, a hydraulic adjustment structure, etc. The distance between the connecting rod and the adjusting rod 538 can be adjusted through the amplitude adjustment structure 539, thereby adjusting the distance between the first pressure rod 535 and the second pressure rod 537.

[0074] The composite reinforcing fiber bundle passes under the first pressure bar 535 and the second pressure bar 537. Adjusting the lifting mounting frame 533 can adjust the height of the first pressure bar frame 534 and the second pressure bar frame 536 mounted on the lifting mounting frame 533, as well as the height of the first pressure bar 535 fixed on the first pressure bar frame 534 and the second pressure bar 537 fixed on the second pressure bar frame 536, thereby ensuring that the composite reinforcing fiber bundle located between the first pressure bar 535 and the second pressure bar 537 can be immersed in the liquid resin contained in the resin impregnation tank 52. Adjusting the amplitude adjustment structure 539 can adjust the length of the composite reinforcing fiber bundle located between the first pressure bar 535 and the second pressure bar 537, thereby adjusting the time for the composite reinforcing fiber bundle to pass through the liquid resin, that is, the time for the resin to impregnate the composite reinforcing fiber bundle.

[0075] In some embodiments of the FRP reinforcing cage production equipment of this application, such as Figure 8 As shown, the glue scraping mechanism 54 includes a glue scraping mounting bracket 541, a glue scraping base plate 542, a glue scraping strip 543, a glue pressing roller 544, a first glue pressing rod 545, a second glue pressing rod 546, a glue pressing rod frame 547, and a pressure rod adjustment mechanism 548.

[0076] The squeegee mounting bracket 541 is fixed at the end of the resin impregnation tank 52 opposite to the fiber input mechanism 51, and is located on the outside of the opposite sides of the resin impregnation tank 52. The squeegee base plate 542 is fixed to the lower part of the squeegee mounting bracket 541, extends obliquely downward from the squeegee mounting bracket 541 to the resin impregnation tank 52, and connects to the edge of the resin impregnation tank 52. The two ends of the squeegee strip 543 are installed on the side edges of the squeegee base plate 542, and the lower edge of the squeegee strip 543 abuts against the squeegee base plate 542 by the elasticity of the squeegee strip 543. The composite reinforcing fiber bundle, after being impregnated in the resin, forms a glued reinforcing fiber bundle that passes over the squeegee base plate 542 and below the squeegee strip 543. The squeegee strip 543 initially scrapes off the resin adhering to the glued reinforcing fiber bundle, reducing the resin content in the glued reinforcing fiber bundle, which is beneficial for accurate control of the resin content in the glued reinforcing fiber bundle in subsequent processes. The scraped resin flows back into the resin impregnation tank 52 along the inclined scraper plate 542, reducing resin waste.

[0077] The pressure roller 544 is mounted on the scraper mounting bracket 541 via a rotating shaft and can rotate on the scraper mounting bracket 541. The pressure rod bracket 547 is mounted on the scraper mounting bracket 541 via a pressure rod adjustment mechanism 548. The pressure rod adjustment mechanism 548 can be adjusted using various suitable mounting position adjustment mechanisms, and the distance between the pressure rod bracket 547 and the pressure roller 544 can be adjusted via the pressure rod adjustment mechanism 548. The first pressing rod 545 and the second pressing rod 546 are mounted on the pressing rod frame 547 and are located on both sides of the rotating shaft of the pressing roller 544, respectively. A pressure spring is provided between the pressing rod adjustment mechanism 548 and the pressing rod frame 547. Under the push of the pressure spring, the first pressing rod 545 and the second pressing rod 546 press the pressing roller 544 with a certain pressure from both sides of the rotating shaft of the pressing roller 544, thereby squeezing out the resin from the glued reinforcing fiber bundle passing between the first pressing rod 545 and the second pressing rod 546 and the pressing roller 544, and controlling the resin content in the glued reinforcing fiber bundle.

[0078] The initial scraping of resin by the adhesive scraper 543 reduces the amount of resin squeezed out of the adhesive-reinforced fiber bundle by the first and second pressure rods 545 and 546, preventing excessive resin from overflowing the pressure rods and flowing back into the adhesive-reinforced fiber bundle, thus affecting the control of the resin content in the adhesive-reinforced fiber bundle. The pressure rod adjustment mechanism 548 can adjust the pressure between the first and second pressure rods 545 and the pressure roller 544, thereby adjusting the resin content in the adhesive-reinforced fiber bundle after being squeezed by the pressure rods.

[0079] In some embodiments of the FRP reinforcing cage production equipment of this application, such as Figure 9 As shown, the composite fiber forming apparatus 2 includes fiber spool units 21, fiber bundle forming rings 22, and fiber bundle guide rods 23. Multiple fiber spool units 21 are stacked to form a stacking frame. Each fiber spool unit 21 has multiple fiber spool storage positions, and each fiber spool storage position holds a reinforcing fiber spool. A fiber guide 211 is provided on the stacking frame above each fiber spool storage position. The fiber guide 211 can be a ring-shaped structure, a hook-shaped structure, or a guide wheel for the reinforcing fiber to pass through. The reinforcing fiber on the reinforcing fiber spool is output through the fiber guide 211, facilitating the continuous extraction of reinforcing fiber from the reinforcing fiber spool.

[0080] A fiber bundle forming ring 22 is disposed at one end of a stacked frame composed of multiple fiber axial support units 21, and the number of fiber bundle forming rings 22 is the same as the number of fiber axial support units 21. Typically, the stacked frame has multiple layers, with multiple fiber axial support units 21 arranged in a straight line on each layer. At the end of each layer, a fiber bundle forming ring 22 is disposed in the same number as the fiber axial support units 21 of that layer. Multiple reinforcing fibers in each fiber axial support unit 21 are guided by their respective guides 211 and enter the same fiber bundle forming ring 22, where they merge into a single composite reinforcing fiber bundle.

[0081] A fiber bundle guide rod 23 is provided at one end of the fiber bundle forming ring 22 of each layer of the frame. The fiber bundle guide rod 23 is located on the side of the fiber bundle forming ring 22 away from the fiber shaft frame unit 21. The fiber bundle guide rod 23 includes an upper guide rod 231 and a lower guide rod 232 arranged parallel to each other. The lower guide rod 232 is positioned lower and closer to the stacked frame, while the upper guide rod 231 is positioned higher and further away from the stacked frame. The composite reinforcing fiber bundles merged by the fiber bundle forming ring 22 pass under the lower guide rod 232 and are then output from above the upper guide rod 231. This method can buffer the extraction force of the composite reinforcing fiber bundles, allowing the composite reinforcing fiber bundles to be output more evenly.

[0082] The FRP (fiberglass reinforced plastic) reinforcing cage manufacturing method of this application is used to manufacture FRP reinforcing cages according to any embodiment of this application using the FRP reinforcing cage production equipment of any embodiment of this application. One embodiment of the FRP reinforcing cage manufacturing method of this application is as follows: Figure 10 As shown, it includes the following steps:

[0083] S10: Combine multiple reinforcing fibers to form a composite reinforcing fiber bundle.

[0084] Each reinforcing fiber is typically wound on a reinforcing fiber spool. Depending on the technical requirements of the composite reinforcing fiber bundle, different numbers of reinforcing fiber spools and different types of reinforcing fibers can be used. Multiple reinforcing fiber spools are placed within the same fiber spool holder unit 21 of the composite fiber forming apparatus 2, and in multiple fiber spool storage positions on the fiber spool holder unit 21. The reinforcing fibers on each reinforcing fiber spool are extracted, passed through the upper guide 211, and merged into a single composite reinforcing fiber bundle in the same fiber bundle forming ring 22 before being output.

[0085] S20: Add resin to composite reinforced fiber bundles to form adhesive-reinforced fiber bundles.

[0086] After being conveyed by the fiber bundle conveying device 3, the composite reinforcing fiber bundle arrives at the movable worktable 4 and enters the resin impregnation device 5 for resin impregnation. Specifically, the composite reinforcing fiber bundle is guided by the fiber input mechanism 51 and enters the fiber pressing impregnation mechanism 53. Under the pressure of the first pressure rod 535 and the second pressure rod 537, it passes through the liquid resin in the resin impregnation tank 52, so that the resin impregnates the composite reinforcing fiber bundle, forming a glued reinforcing fiber bundle. After the excess resin is scraped off by the glue scraping mechanism 54, it is output. The fiber pressing impregnation mechanism 53 can be used to adjust the time when the composite reinforcing fiber bundle is immersed in the resin, thereby adjusting the degree of resin impregnation in the composite reinforcing fiber bundle.

[0087] S30: Group and merge the adhesive-reinforced fiber bundles to form FRP reinforcement bundles.

[0088] The adhesive-coated reinforcing fiber bundles pass through the adhesive-coated fiber output device 6, and the output guide frame 61 allows multiple composite reinforcing fiber bundles to be arranged at individual intervals, facilitating individual guidance of each composite reinforcing fiber bundle. Different grouping guide rollers 62 are equipped with different grouping guide teeth 621 at different rotation positions. Different grouping guide teeth 621 can merge different numbers of composite reinforcing fiber bundles to form FRP reinforcement layer bundles of different numbers, widths, and spacing distances.

[0089] S40: Reciprocatingly winding FRP reinforcement bundles to form FRP reinforcement layers formed by the intersection of FRP reinforcement bundles.

[0090] FRP reinforcement bundles are wound onto the reinforcement cage forming roller 7. Through the rotation of the reinforcement cage forming roller 7 and the movement of the moving worktable 4, the FRP reinforcement bundles are wound at an angle and interval on the reinforcement cage forming roller 7. Through the reverse movement of the moving worktable 4, the FRP reinforcement bundles are wound at an angle and interval in the opposite direction on the reinforcement cage forming roller 7. The FRP reinforcement bundles, inclined in different directions, intersect each other on the reinforcement cage forming roller 7, and the resin in the FRP reinforcement bundles fuses together to form FRP reinforcement layers.

[0091] S50: FRP reinforcement bundles are repeatedly stacked and wound on the FRP reinforcement layer to form an FRP reinforcement cage formed by cross-connection of FRP reinforcements.

[0092] The FRP reinforcing layer bundles continue to be wound repeatedly on the reinforcing cage forming roller 7. The rotation speed of the reinforcing cage forming roller 7 and the moving speed of the moving worktable 4 are controlled so that the newly wound FRP reinforcing layer bundles fall on the previously wound FRP reinforcing layer bundles. The resin in the FRP reinforcing layer bundles fuses together to form FRP ribs 1. The FRP reinforcing layers formed by each reciprocating winding of the FRP reinforcing layer bundles are superimposed, and the resin in them fuses together to form an FRP reinforcing cage. After the resin cures, the FRP reinforcing cage is demolded from the reinforcing cage forming roller 7 to obtain the finished FRP reinforcing cage of this application.

[0093] As a preferred embodiment of the FRP reinforcing cage manufacturing method of this application, the above method can also be used to produce FRP reinforcing cage semi-finished products with a diameter and FRP rib specifications that meet the requirements of the finished FRP reinforcing cage, but with a longer length. After the FRP reinforcing cage semi-finished products have cured, they are cut according to the length requirements of the finished product to obtain multiple FRP reinforcing cage finished products. In this way, multiple FRP reinforcing cage finished products can be obtained in one winding process, further improving the manufacturing efficiency of the FRP reinforcing cage manufacturing method of this application.

[0094] In some embodiments of the FRP reinforcement cage fabrication method of this application, such as Figure 10 As shown, the process also includes step S5: impregnating the reinforcing fiber with a silane coupling agent.

[0095] Silane coupling agent impregnation treatment can be applied to some reinforcing fibers. Specifically, the reinforcing fiber roll can be immersed in a 5% silane coupling agent solution for 30 minutes, then removed and treated at 110°C for 2 hours, followed by ultrasonic cleaning in acetone and air drying before use. Silane coupling agent impregnation treatment can enhance the adhesion of resin to the surface of the reinforcing fibers and improve the mechanical properties of FRP reinforcement cages.

[0096] In S10, the reinforcing fibers include glass fibers, carbon fibers, and polypropylene fibers.

[0097] Multiple reinforcing fiber spools placed in multiple fiber spool storage positions within the same fiber spool holder unit 21 can be spools wound with different types of reinforcing fibers. In one specific embodiment, a fiber spool holder unit 21 has eight fiber spool storage positions, six of which hold spools wound with glass fibers, one holds a spool wound with carbon fibers, and the other holds a spool wound with polypropylene fibers. The composite reinforcing fiber bundle, composed of a mixture of glass fibers, carbon fibers, and polypropylene fibers, not only improves tensile strength in different directions but also has higher processing performance.

[0098] In the description of this invention, the terms "one embodiment," "specific embodiment," "preferred embodiment," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0099] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An FRP reinforcement cage, comprising intersecting FRP reinforcement bars (1), characterized in that: The FRP bar (1) includes multiple reinforcing fiber layers (12) covered by resin (11). The reinforcing fiber layers (12) with different orientations at the intersection connection points of the FRP bar (1) are interlaced layer by layer and covered by resin (11) to form an integral structure. The FRP reinforcing cage is produced by an FRP reinforcing cage production equipment, which includes a composite fiber forming device (2), a fiber bundle conveying device (3), a moving worktable (4), a resin impregnation device (5), an impregnated fiber output device (6), and a reinforcing cage forming roller (7). The composite fiber forming device (2) can extract a set number of reinforcing fibers and mix them to form a composite reinforcing fiber bundle. The fiber bundle conveying device (3) can convey the composite reinforcing fiber bundle to the moving worktable (4). The moving worktable (4) is located on one side of the reinforcing cage forming roller (7) and can reciprocate along the axial direction of the reinforcing cage forming roller (7). The resin impregnation device (5) is located on the moving worktable (4) and can impregnate the composite reinforcing fiber bundle with resin. The impregnated fiber output device (6) is located on the moving worktable (4) and is located between the resin impregnation device (5) and the reinforcing cage forming roller (7). 6) Includes an output guide frame (61) and a group guide roller (62). The output guide frame (61) is located on the side of the group guide roller (62) adjacent to the resin impregnation device (5). The output guide frame (61) is provided with multiple fiber guide grooves (611). The group guide roller (62) is rotatably mounted on the movable worktable (4). The group guide roller (62) is provided with multiple sets of group guide teeth (621). Each set of group guide teeth (621) is located at a different radial position on the group guide roller (62). Different groups of group guide teeth (621) are located at different axial positions on the group guide roller (62) and form different axial offsets in the radial direction, which can group and merge different numbers of composite reinforcing fiber bundles to form FRP rib bundles with interval distribution. The rib cage forming roller (7) can rotate at a set speed to wind the FRP rib bundles around the rib cage forming roller (7) to form the FRP rib (1). The resin impregnation device (5) includes a fiber input mechanism (51), a resin impregnation tank (52), a fiber pressing impregnation mechanism (53), and a scraping mechanism (54). The fiber input mechanism (51) is located at one end of the resin impregnation tank (52) and includes an input guide plate (511) and a comb-shaped guide strip (512). The input guide plate (511) is located on the side of the comb-shaped guide strip (512) away from the resin impregnation tank (52). The input guide plate (511) is provided with a plurality of feedstocks for the composite reinforcing fibers. The fiber bundle passes through a guide hole, and the comb-shaped guide bar (512) includes a plurality of guide grooves for accommodating the composite reinforcing fiber bundle. The guide grooves correspond one-to-one with the guide holes. The fiber pressing and impregnation mechanism (53) is located at the resin impregnation tank (52) and can restrict the composite reinforcing fiber bundle from passing through the resin impregnation tank (52). The glue scraping mechanism (54) is located at the end of the resin impregnation tank (52) opposite to the fiber input mechanism (51) so as to scrape off part of the resin in the composite reinforcing fiber bundle.

2. The FRP reinforcing cage according to claim 1, characterized in that: The reinforcing fiber layer (12) includes multiple composite reinforcing fiber bundles, which are formed by mixing glass fiber, carbon fiber and polypropylene fiber.

3. The FRP reinforcing cage according to claim 2, characterized in that: At least one fiber in the composite reinforced fiber bundle is impregnated with a silane coupling agent.

4. The FRP reinforcing cage according to claim 1, characterized in that: The fiber impregnation mechanism (53) includes an impregnation mounting frame (531), a lifting adjustment structure (532), a lifting mounting frame (533), a first pressure bar frame (534), a first pressure bar (535), a second pressure bar frame (536), a second pressure bar (537), an adjustment rod (538), and an amplitude adjustment structure (539). The impregnation mounting frame (531) is fixed on both sides of the resin impregnation tank (52) adjacent to the end where the fiber input mechanism (51) is located. The lifting mounting frame (533) is mounted on the impregnation mounting frame (531) through the lifting adjustment structure (532) so that it can be adjusted by the lifting adjustment structure (532). The installation height of the lifting mounting frame (533) is determined by the hinge of the first pressure rod frame (534) and the second pressure rod frame (536) on the lifting mounting frame (533). One end of the first pressure rod frame (534) and the second pressure rod frame (536) are both hinged to the adjusting rod (538). The other end of the first pressure rod frame (534) is fixedly connected to the first pressure rod (535), and the other end of the second pressure rod frame (536) is fixedly connected to the second pressure rod (537). The amplitude adjustment structure (539) is provided between the lifting mounting frame (533) and the adjusting rod (538) to adjust the distance between them.

5. The FRP reinforcing cage according to claim 1, characterized in that: The glue scraping mechanism (54) includes a glue scraping mounting frame (541), a glue scraping base plate (542), a glue scraping strip (543), a glue pressing roller (544), a first glue pressing rod (545), a second glue pressing rod (546), a glue pressing rod frame (547), and a pressure rod adjusting mechanism (548). The glue scraping mounting frame (541) is fixed to one end of the resin impregnation tank (52), and the glue scraping base plate (542) is fixed to the lower part of the glue scraping mounting frame (541) and extends obliquely downward to the resin impregnation tank (52). The glue scraper strip (543) is installed above the glue scraper base plate (542) and can abut against the glue scraper base plate (542). The glue pressing roller (544) is rotatably installed on the glue scraper mounting frame (541). The glue pressing rod frame (547) is installed on the glue scraper mounting frame (541) through the pressure rod adjustment mechanism (548). The first glue pressing rod (545) and the second glue pressing rod (546) are installed on the glue pressing rod frame (547) and are located on both sides of the rotation axis of the glue pressing roller (544).

6. The FRP reinforcing cage according to claim 1, characterized in that: The composite fiber forming device (2) includes a fiber shaft support unit (21), a fiber bundle forming ring (22), and a fiber bundle guide rod (23). There are multiple fiber shaft support units (21), and each fiber shaft support unit (21) is provided with multiple fiber shaft storage positions. A guide (211) is provided above each fiber shaft storage position. The fiber bundle forming ring (22) is provided at one end of the multiple fiber shaft support units (21), and the number of fiber bundle forming rings (22) corresponds to the number of fiber shaft support units (21). The fiber bundle guide rod (23) is provided on the side of the fiber bundle forming ring (22) away from the fiber shaft support unit (21), and includes an upper guide rod (231) and a lower guide rod (232) arranged side by side.

7. A method for manufacturing an FRP reinforcing cage, used to manufacture an FRP reinforcing cage according to any one of claims 1-6, characterized in that: Includes the following steps: S10: Combine multiple reinforcing fibers to form a composite reinforcing fiber bundle; S20: Adding resin to composite reinforced fiber bundles to form adhesive-reinforced fiber bundles; S30: Grouping and merging the adhesive-reinforced fiber bundles to form FRP reinforcement bundles; S40: Reciprocatingly and intermittently winding FRP reinforcement bundles to form FRP reinforcement layers formed by the intersection of FRP reinforcement bundles; S50: FRP reinforcement bundles are repeatedly stacked and wound on the FRP reinforcement layer to form an FRP reinforcement cage formed by cross-connection of FRP reinforcements.

8. The method according to claim 7, characterized in that: The method also includes the step of: S5: impregnating the reinforcing fiber with a silane coupling agent; in S10, the reinforcing fiber includes glass fiber, carbon fiber and polypropylene fiber.

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