A high toughness concrete forming device and method with fiber orientation

Abstract

The application discloses a high-toughness concrete forming device and method with fiber directional arrangement, and relates to the technical field of building material forming equipment. The device comprises a concrete forming frame, a fiber directional mechanism and an adhering box connected to the concrete forming frame. The fiber directional mechanism comprises a fixed plate, an extension motor and a directional plate. The two sides of the fixed plate are fixedly connected to the top of the concrete forming frame. The bottom surface of the fixed plate is fixedly connected to the top end of the extension motor. The bottom end of the extension motor is rotatably connected to the top surface of the directional plate. The application has the advantages that the directional grooves on the bottom surface of the directional plate in the fiber directional mechanism mechanically constrain and correct the fibers, realizing the ordered directional arrangement of the fibers. Then, the fine aggregate cement slurry is sprayed onto the fibers with the directional plate by the spraying head of the adhering box, so that the fibers are bonded and solidified, the arrangement state of the fibers is effectively prevented from being scattered during the transfer to the mold, and the continuity and stability of the directional arrangement effect are ensured.

Description

Technical Field

[0001] This invention relates to the field of building material molding equipment technology, specifically to a high-toughness concrete molding device and method with oriented fiber arrangement. Background Technology

[0002] High-toughness concrete is a composite material prepared by incorporating short-cut fibers into a regular concrete matrix. The introduction of fibers can significantly improve the tensile strength, crack resistance, and energy absorption capacity of concrete. Studies have shown that the arrangement of fibers in concrete has a decisive influence on the mechanical properties of the material: when the fibers are oriented along the direction of force, their efficiency in bridging cracks and transferring stress is much higher than that when the fibers are randomly distributed, and the toughness and flexural strength of the prepared components can be significantly improved. However, most existing high-toughness concrete production processes employ a mixing and casting process, where fibers and cement slurry are mixed in a mixer and then directly poured into a mold. The orientation of the fibers during vibration and casting is entirely determined by fluid dynamics, making it difficult to achieve an ordered directional arrangement of the fibers. Although some studies have attempted to orient special fibers using magnetic and electric fields, these methods have stringent requirements for fiber materials and are costly, making them difficult to apply in engineering practice. In existing mechanical molding equipment, after the fibers are combed and arranged, there is a lack of effective means of fixing them during the transfer to the mold. The fibers are easily restored to a random distribution state due to handling vibration, making it difficult to maintain the orientation effect until the final molding. Therefore, we propose a high-toughness concrete molding device and method with fiber directional arrangement. Summary of the Invention

[0003] The purpose of this invention is to provide a high-toughness concrete molding device and method with fiber orientation, including a concrete molding frame, on which a fiber orientation mechanism and an attachment box are connected; The fiber orientation mechanism includes a fixed plate, a telescopic motor, and an orientation plate. The two sides of the fixed plate are fixedly connected to the top of the concrete forming frame. The bottom surface of the fixed plate is fixedly connected to the top of the telescopic motor. The bottom end of the telescopic motor is rotatably connected to the top surface of the orientation plate. The telescopic stroke of the telescopic motor is 50-150mm. The bottom surface of the orientation plate is provided with orientation grooves for correcting the fiber alignment direction. The groove spacing is 2-5mm and the groove depth is 1-3mm. A conveying pipe is fixedly connected to one side of the attachment box, and an installation plate is fixedly connected to the other end of the conveying pipe. The two sides of the installation plate are fixedly connected to the inner walls of the middle two sides of the concrete forming frame. The installation plate is located directly above the output end of the directional groove. A spray head is fixedly connected to the bottom surface of the installation plate. One end of the conveying pipe extends into the interior of the spray head. The spray flow rate of the spray head is 0.5-2L / min, and the spray coverage width matches the width of the fiber conveyor belt.

[0004] As a further aspect of the present invention: the attachment box contains fine aggregate cement slurry, the water-cement ratio of the fine aggregate cement slurry is 0.4-0.6, the fine aggregate particle size is no more than 0.6mm, the conveying pipe is equipped with a control valve for adjusting the flow rate of the fine aggregate cement slurry, and the conveying pipe is equipped with a filter screen, the mesh size of the filter screen is 0.5-0.8mm.

[0005] As a further embodiment of the present invention: a fiber placement frame is fixedly connected to the top of the concrete forming frame, an adjusting plate is rotatably connected to the output end of the fiber placement frame, a fiber conveyor belt is provided below the adjusting plate, the adjusting plate evenly disperses the fibers falling from the output end of the fiber placement frame onto the surface of the fiber conveyor belt, and the top surface of the fiber conveyor belt is in contact with the bottom surface of the directional plate.

[0006] As a further aspect of the present invention: a servo motor is fixedly connected to one side of the concrete forming frame, a cam is fixedly connected to the output end of the servo motor, the outer surface of the cam is in rolling contact with the vibrating plate, a return spring is fixedly connected to each of the four corners of the top surface of the vibrating plate, a positioning block is fixedly connected to the top of the return spring, the positioning block is fixedly connected to both sides of the inner wall of the concrete forming frame, the rotation speed of the servo motor is 50-200 rpm, the vibration amplitude of the vibrating plate is 2-8 mm, the vibration frequency is 5-20 Hz, and the elastic coefficient of the return spring is 10-30 N / mm.

[0007] As a further aspect of the present invention: a transmission extrusion roller is fixedly connected to the axis of the cam, the transmission extrusion roller is located directly above the fiber conveyor belt, the transmission extrusion roller rotates synchronously with the cam and applies periodic pressing force to the fibers on the fiber conveyor belt.

[0008] As a further aspect of the present invention: a scraper is fixedly connected to the inner wall of the concrete forming frame, and the top surface of the scraper is in contact with the bottom surface of the fiber conveyor belt to remove residual fibers on the surface of the fiber conveyor belt.

[0009] As a further aspect of the present invention: a first conveyor belt is fixedly connected to the bottom of the concrete forming frame, and the top surface of the first conveyor belt supports the mold.

[0010] As a further aspect of the present invention: an operation panel is fixedly connected to the side of the concrete forming frame, and the operation panel is electrically connected to the servo motor, the control valve and the telescopic motor respectively, for coordinating the fiber orientation arrangement and fine aggregate cement slurry spraying operation.

[0011] In addition, the present invention also provides a method for molding high-toughness concrete with oriented fiber arrangement, the method comprising: The fiber is placed in the fiber placement box, and the adjusting plate evenly distributes the fiber falling from the output end of the fiber placement box onto the surface of the fiber conveyor belt. Start the telescopic motor, controlling the telescopic stroke within the range of 50-150mm, and drive the orientation plate to move downward, so that the orientation groove on the bottom surface of the orientation plate fits the fibers on the surface of the fiber conveyor belt; start the servo motor, setting the speed to 50-200rpm, and drive the cam to rotate continuously. The cam pushes the vibrating plate to move downward, and the return spring drives the vibrating plate to return upward. The vibrating plate generates a periodic reciprocating motion with an amplitude of 2-8mm and a frequency of 5-20Hz, which helps the fibers to be corrected to the specified alignment direction under the constraint of the orientation groove; at the same time, the transmission pressing roller rotates synchronously with the cam, applying periodic pressure to the fibers on the fiber conveyor belt, so that the fibers are fully embedded in the orientation groove; After the fibers are oriented, the control valve is opened through the operation panel to control the spray flow rate within the range of 0.5-2L / min. The fine aggregate cement slurry in the attachment box is filtered by the filter screen and then transported to the spray head through the conveying pipe. The spray head sprays the fine aggregate cement slurry evenly onto the oriented fibers, so that the fibers adhere and fix each other, preventing the fiber arrangement from becoming disordered during the subsequent transfer process. An oriented fiber layer with fine aggregate cement slurry attached is conveyed to a mold via a first conveyor belt, and then a concrete matrix is ​​poured into the mold. After curing, a high-toughness concrete component with fibers evenly arranged in a specified direction is obtained.

[0012] Compared with the prior art, the beneficial effects of the present invention by adopting the above technical solution are as follows: 1. This invention uses the orientation groove on the bottom surface of the orientation plate in the fiber orientation mechanism to mechanically constrain and correct the fibers, thereby achieving orderly orientation of the fibers. Then, the fine aggregate cement slurry is sprayed onto the orientationed fibers by the attachment box through the spray head, so that the fibers bond and solidify together, effectively preventing the fibers from being scattered during the transfer to the mold, and ensuring the continuity and stability of the orientation effect.

[0013] 2. This invention uses a servo motor to drive a cam to rotate, which in turn causes the vibrating plate to vibrate periodically. The transmission extrusion roller simultaneously applies pressure to the fiber. This dual action promotes the fiber to be fully embedded in the orientation groove and completes the orientation correction. At the same time, the top surface of the orientation plate is connected to the bottom of the telescopic motor, which allows the orientation plate to adaptively adjust its tilt angle when the fiber conveyor belt is vibrated, continuously adhering to the surface of the fiber conveyor belt and ensuring the uniformity of the orientation effect.

[0014] 3. This invention centrally controls the servo motor, control valve, and telescopic motor through the operation panel, realizing the coordinated linkage of fiber orientation and cement slurry spraying processes, improving production efficiency and reducing operation difficulty.

[0015] Other advantages, objectives and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from the practice of the invention. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention; Figure 2 This is a schematic diagram of the fiber conveyor belt connection relationship in an embodiment of the present invention; Figure 3 for Figure 2 Enlarged diagram of A in the middle; Figure 4 This is a schematic diagram of the fiber transport belt in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fiber orientation mechanism in an embodiment of the present invention; Figure 6 This is a schematic diagram of the attachment box in an embodiment of the present invention.

[0017] In the diagram: 1. Concrete forming frame; 2. First conveyor belt; 3. Mold; 31. Fiber placement frame; 32. Adjusting plate; 33. Fiber conveyor belt; 331. Servo motor; 332. Cam; 333. Transmission extrusion roller; 334. Vibrating plate; 335. Return spring; 336. Positioning block; 34. Scraper; 4. Attachment box; 41. Conveying pipe; 42. Mounting plate; 43. Spray head; 44. Filter screen; 5. Fiber orientation mechanism; 51. Orientation plate; 52. Orientation groove; 53. Telescopic motor; 54. Fixing plate; 6. Operation panel. Detailed Implementation

[0018] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand the present invention, but does not constitute a limitation of the present invention.

[0019] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] Please see the appendix Figure 1 -Appendix Figure 6 The present invention provides a high-toughness concrete molding device with fiber orientation arrangement, which includes a concrete molding frame 1, and a fiber orientation mechanism 5 and an attachment box 4 connected to the concrete molding frame 1. The fiber orientation mechanism 5 includes a fixed plate 54, a telescopic motor 53, and an orientation plate 51. The two sides of the fixed plate 54 are fixedly connected to the top of the concrete forming frame 1. The bottom surface of the fixed plate 54 is fixedly connected to the top of the telescopic motor 53. The bottom end of the telescopic motor 53 is rotatably connected to the top surface of the orientation plate 51. The bottom surface of the orientation plate 51 is provided with an orientation groove 52 for correcting the fiber alignment direction. A conveying pipe 41 is fixedly connected to one side of the attachment box 4, and an installation plate 42 is fixedly connected to the other end of the conveying pipe 41. The two sides of the installation plate 42 are fixedly connected to the inner walls of the middle two sides of the concrete forming frame 1. The installation plate 42 is located directly above the output end of the directional groove 52. A spray head 43 is fixedly connected to the bottom surface of the installation plate 42, and one end of the conveying pipe 41 extends into the interior of the spray head 43.

[0021] Furthermore, the attachment box 4 stores fine aggregate cement slurry, and the conveying pipe 41 is equipped with a control valve for adjusting the flow rate of the fine aggregate cement slurry. The conveying pipe 41 is also equipped with a filter screen 44.

[0022] Furthermore, a fiber placement frame 31 is fixedly connected to the top of the concrete forming frame 1, and an adjustment plate 32 is rotatably connected to the output end of the fiber placement frame 31. A fiber conveyor belt 33 is provided below the adjustment plate 32. The adjustment plate 32 evenly disperses the fibers falling from the output end of the fiber placement frame 31 onto the surface of the fiber conveyor belt 33. The top surface of the fiber conveyor belt 33 is in contact with the bottom surface of the orientation plate 51.

[0023] Furthermore, a servo motor 331 is fixedly connected to one side of the concrete forming frame 1, and a cam 332 is fixedly connected to the output end of the servo motor 331. The outer surface of the cam 332 rolls in contact with the vibrating plate 334. A return spring 335 is fixedly connected to each of the four corners of the top surface of the vibrating plate 334. A positioning block 336 is fixedly connected to the top of the return spring 335. The positioning block 336 is fixedly connected to both sides of the inner wall of the concrete forming frame 1.

[0024] Furthermore, a drive extrusion roller 333 is fixedly connected to the shaft of the cam 332. The drive extrusion roller 333 is located directly above the fiber conveyor belt 33. The drive extrusion roller 333 rotates synchronously with the cam 332 and applies periodic pressing force to the fibers on the fiber conveyor belt 33.

[0025] Furthermore, a scraper 34 is fixedly connected to the inner wall of the concrete forming frame 1. The top surface of the scraper 34 contacts the bottom surface of the fiber conveyor belt 33 to remove residual fibers from the surface of the fiber conveyor belt 33.

[0026] Furthermore, the bottom of the concrete forming frame 1 is fixedly connected to a first conveyor belt 2, and the top surface of the first conveyor belt 2 supports the mold 3.

[0027] Furthermore, an operation panel 6 is fixedly connected to the side of the concrete forming frame 1. The operation panel 6 is electrically connected to the servo motor 331, the control valve, and the telescopic motor 53, respectively, for coordinating the control of fiber orientation and fine aggregate cement slurry spraying operations.

[0028] In addition, the present invention also provides a method for molding high-toughness concrete with oriented fiber arrangement, the method comprising: The fiber is placed in the fiber placement frame 31, and the adjusting plate 32 evenly disperses the fiber falling from the output end of the fiber placement frame 31 onto the surface of the fiber conveyor belt 33. The telescopic motor 53 is started to drive the orientation plate 51 to move downward, so that the orientation groove 52 on the bottom surface of the orientation plate 51 fits the fibers on the surface of the fiber conveyor belt 33; the servo motor 331 is started to drive the cam 332 to rotate continuously, the cam 332 pushes the vibrating plate 334 to move downward, and the return spring 335 drives the vibrating plate 334 to return upward. The periodic reciprocating motion of the vibrating plate 334 helps the fibers to be corrected to the specified alignment direction under the constraint of the orientation groove 52; at the same time, the transmission pressing roller 333 rotates synchronously with the cam 332, applying periodic pressure to the fibers on the fiber conveyor belt 33, so that the fibers are fully embedded in the orientation groove 52; After the fibers are oriented, the control valve is opened through the operation panel 6. The fine aggregate cement slurry in the attachment box 4 is filtered by the filter screen 44 and then transported to the spray head 43 through the conveying pipe 41. The spray head 43 sprays the fine aggregate cement slurry evenly onto the oriented fibers, so that the fibers adhere and fix each other, preventing the fiber arrangement from becoming disordered during the subsequent transfer process. The oriented fiber layer with fine aggregate cement slurry attached is conveyed to the mold 3 via the first conveyor belt 2, and then the concrete matrix is ​​poured into the mold 3. After curing, a high-toughness concrete component with fibers evenly arranged in a specified direction is obtained.

[0029] Overall structure of the device The fiber-oriented high-toughness concrete molding device provided by the present invention uses a concrete molding frame 1 as the main supporting frame, and the whole is in the shape of a box structure. The bottom of the concrete molding frame 1 is fixedly connected to a first conveyor belt 2, and the top surface of the first conveyor belt 2 carries a mold 3. The mold 3 moves stepwise under the molding frame with the first conveyor belt 2. The top of the concrete molding frame 1 is connected to a fiber orientation mechanism 5, and the top side of the concrete molding frame 1 is connected to an attachment box 4. The side of the concrete molding frame 1 is fixedly connected to an operation panel 6 for centralized control of the various actuators of the device.

[0030] Fiber supply system A fiber placement frame 31 is fixedly connected to the top of the concrete forming frame 1. The fiber placement frame 31 is a funnel-shaped storage frame. An adjusting plate 32 is rotatably connected to its output end. An adjustable opening gap is formed between the adjusting plate 32 and the output end of the fiber placement frame 31. The operator can control the amount of fiber falling by adjusting the rotation angle of the adjusting plate 32. A fiber conveyor belt 33 is set below the adjusting plate 32. The fiber conveyor belt 33 is horizontally arranged in the middle and upper space of the concrete forming frame 1. After the fiber falls from the fiber placement frame 31, it is evenly dispersed onto the surface of the fiber conveyor belt 33 by the dispersing action of the adjusting plate 32, forming a fiber layup of uniform thickness.

[0031] Vibration-assisted orientation mechanism A servo motor 331 is fixedly connected to one side of the concrete forming frame 1. A cam 332 is fixedly connected to the output end of the servo motor 331. The outer contour surface of the cam 332 maintains rolling contact with the bottom surface of the vibrating plate 334. When the servo motor 331 drives the cam 332 to rotate continuously, the eccentric contour of the cam 332 periodically pushes the vibrating plate 334 downward. A return spring 335 is fixedly connected to the four corners of the top surface of the vibrating plate 334. The top of the return spring 335 is fixedly connected to both sides of the inner wall of the concrete forming frame 1 through the positioning block 336. After being stretched, the return spring 335 provides an upward elastic return force, so that the vibrating plate 334 generates a stable periodic up-and-down reciprocating vibration with the rotation of the cam 332. The vibration of the vibrating plate 334 is transmitted to the fiber conveyor belt 33, causing the irregularly arranged fibers on the fiber conveyor belt 33 to tend to be uniform during vibration.

[0032] A drive extrusion roller 333 is fixedly connected to the shaft of the cam 332. The drive extrusion roller 333 is located directly above the fiber conveyor belt 33 and rotates synchronously with the cam 332. During the rotation, the drive extrusion roller 333 periodically contacts and presses the fibers on the fiber conveyor belt 33. Combined with the vibration, the fibers are further pressed into the orientation groove 52, enhancing the orientation constraint effect.

[0033] A scraper 34 is fixedly connected to the inner wall of the concrete forming frame 1. The top surface of the scraper 34 is in contact with the bottom surface of the fiber conveyor belt 33. During the circulation of the fiber conveyor belt 33, the scraper 34 continuously scrapes off the residual fibers from the bottom surface to prevent the fibers from accumulating on the bottom surface of the conveyor belt and ensure the cleanliness of the conveyor belt surface.

[0034] Fiber Orientation Mechanism The fiber orientation mechanism 5 includes a fixed plate 54, a telescopic motor 53, and an orientation plate 51. The two sides of the fixed plate 54 are fixedly connected to the top of the concrete forming frame 1. The fixed plate 54 forms the top support base of the fiber orientation mechanism 5. The bottom surface of the fixed plate 54 is fixedly connected to the top surface of the telescopic motor 53. The telescopic motor 53 can extend and retract in the vertical direction to adjust the pressing height of the orientation plate 51. The bottom end of the telescopic motor 53 is rotatably connected to the top surface of the orientation plate 51. This rotatable connection structure allows the orientation plate 51 to adaptively adjust its tilt angle with the bottom shaft of the telescopic motor 53 as the fulcrum when subjected to the vibration force transmitted from the vibrating plate 334, and always maintain a close fit with the surface of the fiber conveyor belt 33, avoiding the reduction of orientation effect caused by lifting due to vibration.

[0035] The bottom surface of the orientation plate 51 is provided with several parallel orientation grooves 52 along the fiber transport direction. The direction of the grooves 52 is the target arrangement direction of the fibers. When the telescopic motor 53 drives the orientation plate 51 to press down onto the surface of the fiber transport belt 33, the fibers are forced to be corrected to the specified direction parallel to the groove under the constraint of the groove wall of the orientation groove 52, thus completing the orientation arrangement of the fibers.

[0036] Attachment box and spraying assembly The attachment box 4 contains fine aggregate cement slurry, which is a thin slurry made of fine aggregate with controlled particle size and cement. It has good fluidity and adhesion, can be evenly attached to the fiber surface and initially set in a short time, thus playing a role in bonding and solidifying the fiber arrangement.

[0037] A conveying pipe 41 is fixedly connected to one side of the attachment box 4. A filter screen 44 is installed inside the conveying pipe 41 to prevent aggregate particles with excessive particle size from entering the conveying pipe 41 and causing blockage of the spray head 43. A control valve is installed on the conveying pipe 41. The valve is controlled by an electric switch on the operation panel 6, which can precisely adjust the flow rate and spraying timing of the fine aggregate cement slurry. An installation plate 42 is fixedly connected to the other end of the conveying pipe 41. The two sides of the installation plate 42 are fixedly connected to the inner walls of the middle two sides of the concrete forming frame 1. The installation plate 42 is located directly above the output end of the directional groove 52. A spray head 43 is fixedly connected to the bottom surface of the installation plate 42. One end of the conveying pipe 41 extends into the interior of the spray head 43. The fine aggregate cement slurry is sprayed evenly downwards through the spray head 43 onto the directionally arranged fibers. After the fine aggregate cement slurry adheres to the fibers, they bond together, and the directional arrangement is locked.

[0038] Operation control The control panel 6 is fixedly connected to the side of the concrete forming frame 1 and is electrically connected to the servo motor 331, the control valve and the telescopic motor 53 respectively. The operator can control the start and stop of each mechanism and adjust the parameters through the control panel 6 to realize the coordinated operation of the fiber orientation and fine aggregate cement slurry spraying process.

[0039] Molding method implementation process When using the device of the present invention to form high-toughness concrete with fiber orientation, the following operations are performed sequentially: First, short-cut fibers such as steel fibers, basalt fibers, or polypropylene fibers are placed in the fiber placement frame 31. The opening angle of the adjustment plate 32 is adjusted so that the fibers fall at an appropriate rate and are evenly dispersed on the surface of the fiber conveyor belt 33 to form a fiber layup of uniform thickness. The fiber layup moves forward with the fiber conveyor belt 33.

[0040] After the fiber layup enters the working area of ​​the fiber orientation mechanism 5, the telescopic motor 53 is activated via the operation panel 6. The telescopic motor 53 extends and drives the orientation plate 51 to press downward onto the surface of the fiber conveyor belt 33. The orientation groove 52 covers the fiber layup. At the same time, the operation panel 6 activates the servo motor 331, which drives the cam 332 to rotate continuously. The cam 332 periodically lifts the vibrating plate 334, and the return spring 335 synchronously drives the vibrating plate 334 to return upward. The vibrating plate 334 generates stable periodic vibration on the fiber conveyor belt 33. The fiber completes orientation correction under the dual constraints of vibration and the groove wall of the orientation groove 52. The transmission pressing roller 333 rotates synchronously with the cam 332, applying periodic pressing force to the fiber on the fiber conveyor belt 33 to ensure that the fiber is fully embedded in the orientation groove 52.

[0041] After orientation is completed, the control valve is opened through the operation panel 6. The fine aggregate cement slurry in the attachment box 4 is filtered by the filter screen 44 and flows along the conveying pipe 41 to the spray head 43. It is then sprayed evenly downwards from the spray head 43 onto the oriented fiber layup. The fibers adhere to each other due to the bonding effect of the fine aggregate cement slurry, and the oriented arrangement is solidified and locked.

[0042] Finally, the oriented fiber layup with fine aggregate cement paste moves to the output end with the fiber conveyor belt 33 and falls into the mold 3 directly below, which is carried by the first conveyor belt 2. Then, concrete matrix is ​​poured into the mold 3. After vibration compaction and standard curing, a high-toughness concrete component with fibers evenly arranged in the specified direction is obtained.

[0043] When using the device of the present invention to form high-toughness concrete with fiber orientation, the following operations are performed sequentially: Example 1: First, chopped steel fibers with a length of 13mm are placed in the fiber placement frame 31. The opening angle of the adjustment plate 32 is adjusted so that the steel fibers fall at an appropriate rate and are evenly dispersed on the surface of the fiber conveyor belt 33 to form a fiber layup of uniform thickness. The fiber layup moves forward with the fiber conveyor belt 33.

[0044] After the fiber layup enters the working area of ​​the fiber orientation mechanism 5, the telescopic motor 53 is started via the operation panel 6, with the stroke set to 80mm. The telescopic motor 53 extends and drives the orientation plate 51 to press down onto the surface of the fiber conveyor belt 33. The orientation groove 52 (groove spacing 3mm, groove depth 2mm) covers the fiber layup. At the same time, the operation panel 6 starts the servo motor 331, with the speed set to 100rpm. The servo motor 331 drives the cam 332 to rotate continuously. The cam 332 periodically lifts the vibrating plate 334 (amplitude 4mm, frequency 10Hz). The return spring 335 (elastic coefficient 20N / mm) synchronously drives the vibrating plate 334 to return to its original position. The vibrating plate 334 generates stable periodic vibration on the fiber conveyor belt 33. The steel fibers complete the orientation correction under the dual constraints of vibration and the groove wall of the orientation groove 52. The transmission extrusion roller 333 rotates synchronously with the cam 332, applying periodic pressing force to the steel fibers on the fiber conveyor belt 33 to ensure that the steel fibers are fully embedded in the orientation groove 52.

[0045] After orientation is completed, the control valve is opened through the operation panel 6, and the spray flow rate is set to 1L / min. The fine aggregate cement slurry (water-cement ratio 0.5, fine aggregate particle size ≤0.6mm) in the attachment box 4 is filtered through the filter screen 44 (pore size 0.6mm) and flows along the conveying pipe 41 to the spray head 43. It is then sprayed evenly downwards from the spray head 43 onto the oriented steel fiber layup. The steel fibers adhere to each other due to the bonding effect of the fine aggregate cement slurry, and the oriented arrangement is instantly solidified and locked.

[0046] Finally, the oriented fiber layup with fine aggregate cement paste moves to the output end with the fiber conveyor belt 33 and falls into the mold 3 directly below, which is carried by the first conveyor belt 2. Then, concrete matrix is ​​poured into the mold 3. After vibration compaction and standard curing (temperature 20±2℃, relative humidity ≥95%, curing for 28 days), a high-toughness concrete component with steel fibers evenly arranged in the specified direction is obtained.

[0047] Example 2: In this example, short-cut carbon fiber is used instead of the short-cut steel fiber in Example 1 to verify the process versatility of the method of the present invention. The device structure is the same as in Example 1, and the process parameters are adjusted as follows.

[0048] Short carbon fibers, 6 mm in length and 7 μm in diameter, were placed in fiber placement frame 31. Because carbon fibers have a low density (approximately 1.8 g / cm³), thin filaments, and high elastic modulus (230-400 GPa), they are less prone to bending under gravity and vibration compared to steel fibers. Therefore, specific adjustments were made to various process parameters. The servo motor 331 speed was adjusted to 80 rpm, the vibration plate 334 amplitude was adjusted to 3 mm, and the vibration frequency was set to 8 Hz to avoid excessive vibration causing the carbon fiber monofilaments to break; the travel of the telescopic motor 53 was adjusted to 60 mm; the groove spacing of the directional groove 52 was 2 mm (a smaller spacing that matches the diameter of the carbon fiber), and the groove depth was adjusted to 1.5 mm.

[0049] After the fiber orientation is completed, the spraying flow rate is controlled at 0.8L / min, and the water-cement ratio of fine aggregate cement slurry is adjusted to 0.45 (slightly lower than in Example 1, to adapt to the characteristics of low surface energy and relatively poor wettability of carbon fiber). After being filtered through filter screen 44 (pore size 0.5mm), it is evenly sprayed onto the oriented carbon fiber layer by spray head 43. The carbon fibers are bonded to each other by fine aggregate cement slurry, and the oriented arrangement is solidified and locked.

[0050] The directional carbon fiber layer was then transferred to mold 3, and a concrete matrix was poured in. After compaction and standard curing for 28 days, a high-toughness concrete component with carbon fibers evenly arranged in the specified direction was obtained.

[0051] This embodiment achieves effective orientation and transfer curing of carbon fibers by adjusting parameters such as servo motor speed (80 rpm), vibration amplitude (3 mm), vibration frequency (8 Hz), telescopic motor stroke (60 mm), orientation groove spacing (2 mm), and spray flow rate (0.8 L / min), fully verifying the universal applicability of the process route of this invention to different types of short-cut fibers.

[0052] Comparative Example To demonstrate the technical effectiveness of feature C of the present invention (immediate solidification of sprayed fine aggregate cement slurry to prevent transfer and scattering), and the unpredictability of this effectiveness, the following comparative experiment was conducted: Experimental group (complete process of the present invention): The complete process of Example 1 is adopted. After the steel fiber is oriented, fine aggregate cement slurry (flow rate 1L / min, water-cement ratio 0.5) is sprayed for immediate curing. Then it is transferred to the mold 3 via the first conveyor belt 2 and the concrete matrix is ​​poured. Standard curing is carried out for 28 days.

[0053] Control group (direct transfer without spraying and curing): Except for not spraying fine aggregate cement slurry after fiber orientation and directly transferring the oriented steel fiber layer to the mold by conveyor belt, the other device parameters and process flow are exactly the same as the experimental group (extension stroke 80mm, rotation speed 100rpm, amplitude 4mm, frequency 10Hz, spring coefficient 20N / mm, groove spacing 3mm, groove depth 2mm).

[0054] Testing indicators: (1) Fiber orientation retention rate (%): The cross-section of the final cured and molded component was scanned using image analysis method, and the percentage of fibers with fiber deflection angle within ±15° of the target direction was counted. (2) Flexural strength of concrete (MPa): 40mm×40mm×160mm specimens were prepared according to GB / T 17671 standard, and the flexural strength was tested after 28 days; (3) Bending toughness (J): A 150mm×150mm×550mm prism specimen was prepared according to ASTM C1609 standard. Four-point bending load was applied with a net span of 450mm, and the area enclosed by the load-deflection curve (bending toughness index) was measured.

[0055] Experimental results:

[0056] Experimental results show that, under identical process parameters, the fiber orientation retention rate of the oriented fiber layer cured by spraying fine aggregate cement slurry (experimental group) reached 87.3%, a 65.9% increase compared to the control group (52.6%); the 28-day flexural strength of the concrete increased by 36.2% (12.8 MPa vs. 9.4 MPa); and the flexural toughness increased by 55.4% (48.5 J vs. 31.2 J). These quantitative results fully demonstrate that achieving immediate curing of the oriented fiber layer through spraying fine aggregate cement slurry effectively prevents fiber dispersion during transfer while maintaining the bonding quality of the subsequent concrete matrix, thereby significantly improving the mechanical properties of the final component. This technological effect is not something that can be predicted simply by adding spraying techniques to existing oriented devices; it is unpredictable.

[0057] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1 Based on.

[0058] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments.

[0060] For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A high-toughness concrete molding device with fiber orientation, comprising a concrete molding frame (1), characterized in that, The concrete forming frame (1) is connected to a fiber orientation mechanism (5) and an attachment box (4). The fiber orientation mechanism (5) includes a fixed plate (54), a telescopic motor (53), and an orientation plate (51). The two sides of the fixed plate (54) are fixedly connected to the top of the concrete forming frame (1). The bottom surface of the fixed plate (54) is fixedly connected to the top of the telescopic motor (53). The bottom end of the telescopic motor (53) is rotatably connected to the top surface of the orientation plate (51). The telescopic stroke of the telescopic motor is 50-150mm. The bottom surface of the orientation plate (51) is provided with orientation grooves (52) for correcting the fiber alignment direction. The groove spacing of the orientation groove is 2-5mm and the groove depth is 1-3mm. A conveying pipe (41) is fixedly connected to one side of the attachment box (4), and an installation plate (42) is fixedly connected to the other end of the conveying pipe (41). The two sides of the installation plate (42) are fixedly connected to the inner walls of the middle two sides of the concrete forming frame (1). The installation plate (42) is located directly above the output end of the directional groove (52). A spray head (43) is fixedly connected to the bottom surface of the installation plate (42). One end of the conveying pipe (41) extends into the interior of the spray head (43). The spray flow rate of the spray head is 0.5-2L / min, and the spray coverage width matches the width of the fiber conveyor belt. A fiber placement frame (31) is fixedly connected to the top of the concrete forming frame (1). An adjustment plate (32) is rotatably connected to the output end of the fiber placement frame (31). A fiber conveyor belt (33) is provided below the adjustment plate (32). The adjustment plate (32) evenly disperses the fibers falling from the output end of the fiber placement frame (31) onto the surface of the fiber conveyor belt (33). The top surface of the fiber conveyor belt (33) is in contact with the bottom surface of the orientation plate (51). A servo motor (331) is fixedly connected to one side of the concrete forming frame (1). A cam (332) is fixedly connected to the output end of the servo motor (331). The outer surface of the cam (332) is in rolling contact with the vibrating plate (334). A return spring (335) is fixedly connected to each of the four corners of the top surface of the vibrating plate (334). A positioning block (336) is fixedly connected to the top of the return spring (335). The positioning block (336) is fixedly connected to both sides of the inner wall of the concrete forming frame (1). The rotation speed of the servo motor is 50-200 rpm. The vibration amplitude of the vibrating plate is 2-8 mm and the vibration frequency is 5-20 Hz. The elastic coefficient of the return spring is 10-30 N / mm.

2. The fiber-oriented high-toughness concrete molding device according to claim 1, characterized in that: The attachment box (4) contains fine aggregate cement slurry with a water-cement ratio of 0.4-0.6 and a fine aggregate particle size of no more than 0.6 mm. The conveying pipe (41) is equipped with a control valve for adjusting the flow rate of the fine aggregate cement slurry. The conveying pipe (41) is equipped with a filter screen (44) with a mesh size of 0.5-0.8 mm.

3. The high-toughness concrete molding device with fiber directional arrangement according to claim 2, characterized in that: A drive extrusion roller (333) is fixedly connected to the axis of the cam (332). The drive extrusion roller (333) is located directly above the fiber conveyor belt (33). The drive extrusion roller (333) rotates synchronously with the cam (332) and applies periodic pressing force to the fibers on the fiber conveyor belt (33).

4. The fiber-oriented high-toughness concrete molding device according to claim 3, characterized in that: A scraper (34) is fixedly connected to the inner wall of the concrete forming frame (1). The top surface of the scraper (34) is in contact with the bottom surface of the fiber conveyor belt (33) to remove residual fibers on the surface of the fiber conveyor belt (33).

5. The fiber-oriented high-toughness concrete molding device according to claim 4, characterized in that: The bottom of the concrete forming frame (1) is fixedly connected to a first conveyor belt (2), and the top surface of the first conveyor belt (2) carries a mold (3).

6. The fiber-oriented high-toughness concrete molding device according to claim 4, characterized in that: An operation panel (6) is fixedly connected to the side of the concrete forming frame (1). The operation panel (6) is electrically connected to the servo motor (331), the control valve and the telescopic motor (53) respectively, and is used to coordinate the control of fiber orientation and fine aggregate cement slurry spraying operation.

7. A method for molding high-toughness concrete with oriented fiber arrangement, using the apparatus according to any one of claims 3 to 6, characterized in that, The method includes: The fiber is placed in the fiber placement frame (31), and the fiber falling from the output end of the fiber placement frame (31) is evenly distributed to the surface of the fiber conveyor belt (33) by the adjusting plate (32); Start the telescopic motor (53) and control the telescopic stroke within the range of 50-150mm to drive the orientation plate (51) to move downward, so that the orientation groove (52) on the bottom surface of the orientation plate (51) fits the fibers on the surface of the fiber conveyor belt (33); start the servo motor (331) and set the speed to 50-200rpm to drive the cam (332) to rotate continuously. The cam (332) pushes the vibrating plate (334) to move downward, and the return spring (335) drives the vibrating plate (334) to return upward. The vibrating plate (334) generates a periodic reciprocating motion with an amplitude of 2-8mm and a frequency of 5-20Hz, which helps the fibers to be corrected to the specified arrangement direction under the constraint of the orientation groove (52); at the same time, the transmission pressing roller (333) rotates synchronously with the cam (332) to apply periodic pressure to the fibers on the fiber conveyor belt (33), so that the fibers are fully embedded in the orientation groove (52). After the fibers are oriented, the control valve is opened through the operation panel (6) to control the spray flow rate within the range of 0.5-2L / min. The fine aggregate cement slurry in the attachment box (4) is filtered by the filter screen (44) and then transported to the spray head (43) through the conveying pipe (41). The spray head (43) sprays the fine aggregate cement slurry evenly onto the oriented fibers, so that the fibers adhere and fix each other, preventing the fiber arrangement from becoming disordered during the subsequent transfer process. The oriented fiber layer with fine aggregate cement slurry attached is conveyed to the mold (3) via the first conveyor belt (2), and then the concrete matrix is ​​poured into the mold (3). After curing and molding, a high-toughness concrete component with fibers evenly arranged in the specified direction is obtained.

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