Multi-mode self-adaptive UHPC fiber dispersion metering device and method

Abstract

The invention discloses a multi-mode self-adaptive UHPC fiber dispersion metering device and method.The device comprises a dispersion bin and a belt conveying device, a weighing device is assembled on the belt conveying device so as to dynamically weigh fiber materials on the belt conveying device in real time, and the upper end and the lower end of the dispersion bin are connected with a discharging bin and a discharging hopper respectively; a discharging opening communicated with the discharging hopper is formed in the middle of the dispersing bin, a material distributing disc is rotationally arranged on the discharging opening, a main shaft is assembled in the middle of the material distributing disc, a first motor is installed at the top of the discharging bin through a support, and an output shaft of the first motor is in transmission connection with the main shaft; through the multi-mode self-adaptive design, the device can automatically adjust the dispersion strength, switch the filter sieve plate and adapt to flow control parameters according to the characteristics of different types of fibers such as synthesis, minerals and metals, realizes efficient and uniform dispersion and accurate metering of the fibers, effectively adapts to the production requirements of multi-formula UHPC (Ultra High Performance Concrete), and greatly improves the application range and production flexibility of the device; and the UHPC quality stability is ensured.

Description

Technical Field

[0001] This invention relates to the field of fiber dispersion technology, specifically a multi-mode adaptive UHPC fiber dispersion metering device and method. Background Technology

[0002] The performance of ultra-high performance concrete (UHPC) is highly dependent on the reinforcing effect of fibers. However, in engineering applications, the type of fiber must be flexibly selected based on the specific application scenario of UHPC (such as bridge load-bearing, blast-resistant structures, and thin-walled components). Synthetic fibers (PP, PAN, PE, etc., lightweight and small-diameter, requiring prevention of agglomeration), mineral fibers (basalt, glass fiber, etc., rigid and fixed-length, requiring prevention of excessive length), and metal fibers (copper-plated steel fibers, recycled steel fibers, etc., large-diameter and heavy, requiring prevention of clogging) have significantly different physical properties, leading to drastically different requirements for dispersion methods, filtration specifications, and flow control. This necessitates that fiber dispersion metering devices possess "multi-mode adaptive" capabilities to match diverse fiber characteristics and production conditions. However, current technology has a fundamental shortcoming in "multi-mode adaptive" capabilities, becoming a core obstacle restricting the flexible production of UHPC. Existing equipment uses a single dispersion mode and lacks adaptive adjustment capabilities, failing to meet the dispersion requirements of different fibers. Traditional equipment often employs fixed-intensity vibration or single-airflow dispersion. For example, for easily agglomerated synthetic fibers, a gentle and high-frequency dispersion mechanism is needed to prevent fiber bundle adhesion, but the vibration intensity of existing vibrating screens is not adjustable, easily leading to increased agglomeration of synthetic fibers. For rigid mineral fibers, directional dispersion is required to prevent entanglement, but existing equipment lacks switchable dispersion trajectory control, only achieving material falling in a single direction. For coarse and heavy metal fibers, strong vibration is needed to assist in loosening and prevent accumulation, but the driving force of existing dispersion mechanisms is fixed and cannot adaptively increase vibration or adjust the throwing force, resulting in significant differences in dispersion effects for different fibers, making it difficult to meet the uniform dispersion requirements of all types of fibers. Summary of the Invention

[0003] The purpose of this invention is to provide a multi-mode adaptive UHPC fiber dispersion metering device and method to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a multi-mode adaptive UHPC fiber dispersion metering device, comprising a dispersion bin and a belt conveyor, wherein a weighing device is mounted on the belt conveyor for real-time dynamic weighing of the fiber material thereon, a feeding bin and a discharge hopper are respectively connected to the upper and lower ends of the dispersion bin, a feeding port communicating with the discharge hopper is opened in the middle of the dispersion bin, a distribution plate is rotatably mounted on the feeding port, a main shaft is mounted in the middle of the distribution plate, and a first motor is mounted on the top of the feeding bin via a bracket, and the output shaft of the first motor is connected to the main shaft for transmission. The outer circumference of the main shaft, located within the dispersion chamber, is equipped with several material-pushing teeth, which are evenly distributed along the circumference of the main shaft. The outer circumference of the main shaft, located within the feeding chamber, is equipped with a pusher plate. The distribution disc has a fan-shaped discharge port. When the main shaft rotates, it drives the material-pushing teeth, pusher plate, and distribution disc to rotate synchronously. The inner wall of the dispersion chamber is equipped with several material-swinging components. When the distribution disc rotates, these components periodically swing, throwing the fibers upwards to form a dispersion trajectory. The discharge hopper is equipped with an adjustable filter assembly. By switching between different sieve plates, different fiber materials can be selectively sieved.

[0005] Furthermore, the material handling assembly includes an arc-shaped material handling plate and a support frame. The upper end of the material handling plate is hinged to the inner wall of the dispersion chamber, and a torsion spring mechanism is provided at the hinge to allow the material handling plate to automatically reset after being subjected to external force. The support frame is fixedly assembled to the inner wall of the dispersion chamber and located below the material handling plate. A sliding groove is provided on the support frame, and a slider is slidably disposed in the groove. A wedge-shaped push block is connected to the bottom end of the slider, and the push block extends to the bottom of the support frame. Several push plates with inclined surfaces are distributed on the top side of the material distribution plate. Both the push plate and the push plate are provided with matching inclined surfaces, so that when the material distribution plate rotates, the inclined surfaces of the push plates engage with the inclined surfaces of the push blocks to push and drive the slider to make horizontal displacement. A pull rope is connected between the top end of the slider and the bottom end of the material handling plate.

[0006] Furthermore, the dispersion bin is assembled onto the belt conveyor via several spring components, and several vibrating motors are installed on the side of the dispersion bin; the filtration assembly includes a switching shaft and a second motor, the second motor being located on the side of the discharge hopper and connected to the switching shaft, and multiple sets of screen plates are equidistantly installed on the switching shaft, wherein the screen plates at symmetrical positions have the same aperture specification, and the screening module adapted to different fibers can be quickly selected by rotating the switching shaft.

[0007] Furthermore, the end face connecting the top of the discharge hopper to the dispersion bin has an inclined structure, and an arc-shaped baffle is provided in the middle of the top of the discharge hopper. The arc-shaped baffle is located directly above the switching shaft to prevent fibers from falling into the inclined screen plates on the upper side.

[0008] Furthermore, air outlets are provided at both the left and right ends of the upper part of the discharge hopper, and an air supply pipe is provided on the outer side of the discharge hopper. The two ends of the air supply pipe are connected to the air outlets on both sides respectively, and an electrically controlled reversing valve is connected to the middle of the air supply pipe. The input end of the electrically controlled reversing valve is connected to an external air source.

[0009] Furthermore, the upper surface of the distributing disc is provided with several sparsely toothed dispersing strips.

[0010] Furthermore, a feeding adjustment mechanism is provided at the lower part of the discharge hopper. The feeding adjustment mechanism includes several adjustment components arranged along the length of the discharge hopper. Each adjustment component includes two symmetrically arranged baffles. The upper end of each baffle is rotatably mounted on the inner wall of the discharge hopper, and the other end of each baffle is hinged to an adjustment plate. The other end of the adjustment plate is hinged to a drive block. An adjustment port is provided on the inner wall of the discharge hopper. The drive block is slidably mounted on the adjustment port, and a drive frame is slidably mounted on the outer side of the discharge hopper. Each drive block extends to connect with the drive frame. A telescopic cylinder connected to the drive frame is provided on the discharge hopper. Finally, the telescopic cylinder drives all the baffles to synchronously adjust their opening and closing angles, thereby achieving precise control of the material flow rate.

[0011] The present invention also provides a dispersion metering method for a multi-mode adaptive UHPC fiber dispersion metering device as described above, comprising the following steps: S1. Fiber dispersion stage: The first motor is started to drive the main shaft to rotate, which in turn drives the feeding teeth, the pushing plate and the distributing plate to rotate. The feeding teeth radially disperse the fibers in the dispersion chamber, while the distributing plate pusher triggers the swaying component to reciprocate and throw the fibers through the inclined plane transmission, forming a three-dimensional dispersion trajectory. S2. Dynamic metering and adjustment: The weighing device of the belt conveyor monitors the fiber flow rate in real time and feeds it back to the control system; the frequency of the vibrating motor and the speed of the dispensing disc are automatically adjusted according to the preset ratio to control the feeding rate. S3. Grading and screening control: The second motor drives the switching shaft to rotate and selects the screen plate group that is suitable for the current fiber; at the same time, the electrically controlled reversing valve periodically switches the air supply direction according to the set time interval, so that compressed air is alternately sprayed from the air outlets on the left and right sides of the discharge hopper, and blown through the air outlets to assist in dispersion and prevent blockage of the screen plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This device achieves efficient dispersion through the coordinated operation of multiple mechanisms: the fan-shaped discharge port of the distribution plate rotates with the main shaft, evenly distributing the fibers to various parts of the discharge hopper to avoid local accumulation; the material swaying component oscillates periodically under the drive of the distribution plate, scattering the fibers to form a dispersion trajectory, achieving uniform spatial distribution of the fibers; in conjunction with the vibration motor driving the dispersion chamber and discharge hopper to vibrate, it assists in loosening the fibers, and the circulating airflow blows away the agglomerated fibers, further enhancing the dispersion effect, ultimately allowing the fibers to enter the subsequent processes in a uniform state, providing a guarantee for the stable distribution of fibers in UHPC, and effectively improving the mechanical properties and quality stability of UHPC products.

[0013] 2. This device features an adjustable filtration assembly: A second motor drives the switching shaft to rotate, allowing for rapid switching between sieve plates with different pore sizes. Combined with the corresponding activation of various dispersing components, it can meet the specific characteristics of different fiber materials. This eliminates the need to replace the entire system to accommodate diverse fibers, significantly expanding the device's applicability, reducing equipment investment costs for companies due to fiber type changes, and meeting the production needs of different UHPC formulations.

[0014] 3. This device uses a weighing device to dynamically monitor the weight of fibers on the belt conveyor in real time, providing real-time and accurate data for flow rate adjustment; the feeding adjustment mechanism is driven by a telescopic cylinder to synchronously adjust the opening and closing angle of all baffles, which can precisely control the fiber falling flow rate, ensuring that the actual flow rate is consistent with the process setting value, and avoiding UHPC ratio deviation caused by flow rate fluctuations. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a schematic diagram of the distribution bin structure of the present invention; Figure 4 This is a cross-sectional view of the dispersion bin of the present invention; Figure 5 This is a schematic diagram of the material handling assembly structure of the present invention; Figure 6 This is a schematic diagram of the filter assembly of the present invention; Figure 7 This is a cross-sectional view of the discharge hopper of the present invention; In the diagram, the components are: dispersion bin-1, belt conveyor-2, feeding bin-3, discharge hopper-4, distribution plate-5, main shaft-6, first motor-7, feeding teeth-8, pusher plate-9, discharge port-10, material swing assembly-11, material swing plate-12, support frame-13, slider-14, push block-15, push plate-16, pull rope-17, spring component-18, vibration motor-20, switching shaft-21, second motor-22, screen plate-23, air outlet-24, air supply pipe-25, electrically controlled reversing valve-26, dispersion bar-27, baffle-28, adjusting plate-29, adjusting port-30, drive frame-31, telescopic cylinder-32, and arc-shaped baffle-33. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figures 1 to 7 As shown, a multi-mode adaptive UHPC fiber dispersion metering device includes a dispersion bin 1 and a belt conveyor 2. The belt conveyor 2 is equipped with a weighing device to perform real-time dynamic weighing of the fiber material on it. The upper and lower ends of the dispersion bin 1 are respectively connected to a feeding bin 3 and a discharge hopper 4. The middle of the dispersion bin 1 has a feeding port that communicates with the discharge hopper 4. A distribution plate 5 is rotatably installed on the feeding port. A main shaft 6 is installed in the middle of the distribution plate 5. A first motor 7 is installed on the top of the feeding bin 3 through a bracket, and the output shaft of the first motor 7 is connected to the main shaft 6 for transmission. The portion of the outer circumference of the main shaft 6 located within the dispersion chamber 1 is equipped with several feeding teeth 8, which are evenly distributed along the circumference of the main shaft 6. The portion of the outer circumference of the main shaft 6 located within the feeding chamber 3 is equipped with a pusher plate 9, and the upper surface of the distribution disc 5 is distributed with several sparsely toothed dispersion strips 27. A fan-shaped discharge port 10 is provided on the distribution disc 5. When the main shaft 6 rotates, it drives the feeding teeth 8, the pusher plate 9, and the distribution disc 5 to rotate synchronously. When the main shaft 6 rotates, the circumferentially evenly distributed feeding teeth 8 radially cut and disperse the fibers, breaking up fiber clumps. The specially designed sparsely toothed dispersion strips 27 generate vortices when the distribution disc 5 rotates, enhancing the fiber separation effect.

[0018] The inner wall of the dispersion bin 1 is equipped with several material swaying components 11. When the material distribution plate 5 rotates, it will periodically move the material swaying components 11 to swing, thereby throwing the fibers upward to form a dispersion trajectory. The discharge hopper 4 is equipped with an adjustable filter component. By switching different specifications of sieve plates 23, different fiber materials can be selectively sieved. The dispersing strips 27 on the upper surface of the distributing disc 5 rotate with the main shaft 6 to initially comb the fibers; the fan-shaped discharge ports 10 on the distributing disc 5 periodically align with different areas of the discharge hopper 4 as the distributing disc 5 rotates, evenly distributing the initially combed fibers and dropping them into various parts of the discharge hopper 4, thus preventing the fibers from accumulating locally in the discharge hopper 4.

[0019] In this embodiment, the material handling assembly 11 includes an arc-shaped material handling plate 12 and a support frame 13. The upper end of the material handling plate 12 is hinged to the inner wall of the dispersion chamber 1, and a torsion spring mechanism is provided at the hinge to allow the material handling plate 12 to automatically reset after being subjected to external force. The support frame 13 is fixedly assembled to the inner wall of the dispersion chamber 1 and located below the material handling plate 12. A sliding groove is provided on the support frame 13, and a slider 14 is slidably disposed in the sliding groove. A wedge-shaped push block 15 is connected to the bottom end of the slider 14, and the push block 15 extends to the bottom of the support frame 13. Several push plates 16 with inclined surfaces are distributed on the top side of the material distribution plate 5. Both the push plate 16 and the push plate 16 are provided with matching inclined surfaces. When the material distribution plate 5 rotates, the inclined surfaces of the push plate 16 and the inclined surfaces of the push block 15 engage and push, thereby driving the slider 14 to make horizontal displacement. A pull rope 17 is connected between the top end of the slider 14 and the bottom end of the material handling plate 12. The inclined push plate 16 on the side of the distribution plate 5 periodically engages with the inclined surface of the wedge-shaped push block 15 of the material handling assembly 11, pushing the slider 14 to move horizontally along the slide groove of the support frame 13. The pull rope 17 pulls the material handling plate 12 to swing around the hinge point (the torsion spring mechanism is stretched). After the push plate 16 disengages, the torsion spring resets, causing the material handling plate 12 to rebound, throwing the fibers upward to form a dispersion trajectory, thus achieving uniform fiber dispersion.

[0020] In this embodiment, the dispersion bin 1 is assembled on the belt conveyor 2 by a number of springs 18, and a number of vibration motors 20 are installed on the side of the dispersion bin 1; the filter assembly includes a switching shaft 21 and a second motor 22. The second motor 22 is located on the side of the discharge hopper 4 and connected to the switching shaft 21. Multiple sets of screen plates 23 are installed at equal intervals on the switching shaft 21, wherein the screen plates 23 in symmetrical positions have the same aperture specification. By rotating the switching shaft 21, the screening module that is suitable for different fibers can be quickly selected.

[0021] The second motor 22 drives the switching shaft 21 to rotate. The switching shaft 21 is equipped with multiple sets of screen plates 23 (the screen plates 23 in symmetrical positions are of the same specification). The screen plates 23 are switched to adapt to the characteristics of different types of fibers: For synthetic fibers (such as PP fiber, PAN fiber, PE fiber, PVC fiber, which are mostly thin-diameter flexible fibers and are prone to slight agglomeration), a screen plate 23 with a fine aperture is selected to intercept agglomerated fiber clumps and prevent qualified fine fibers from passing through the screen; For mineral fibers (such as basalt fiber, glass fiber, which are mostly rigid fibers of fixed length and are prone to forming impurities due to excessive length), a screen plate 23 with an aperture matching its length is selected to prevent overly long fibers from entering subsequent processes; For metal fibers (such as copper-plated steel fiber, recycled steel fiber, waste steel fiber, which are mostly coarse-diameter rigid fibers and may contain irregular impurities), a screen plate 23 with a larger aperture matching its diameter is selected to avoid screen blockage and intercept impurity particles. By rotating the switching shaft 21, the corresponding fiber sieve plate 23 can be quickly selected to ensure that the particle size and shape of the discharged fiber meet the requirements of UHPC preparation. After switching, the sieve plate 23 is in contact with the inner wall of the discharge hopper 4 to prevent unscreened fibers from leaking out.

[0022] In addition, the materials and structures of different screen plates 23 are also different. For synthetic fibers, a 0.3-0.5mm polished screen plate is used and equipped with an anti-static guide groove. For metal fibers, a 1.2-2.0mm wear-resistant tungsten carbide screen plate is used, and for mineral fibers, a 0.8-1.2mm high-temperature resistant ceramic screen plate is used.

[0023] In this embodiment, the end face connecting the top of the discharge hopper 4 to the dispersion bin 1 is inclined. An arc-shaped baffle 33 is provided in the middle of the top of the discharge hopper. The arc-shaped baffle is located directly above the switching shaft. Since there are six screen plates 23 distributed on the switching shaft, when the other group is in horizontal screening operation, there will be two screen plates 23 in an inclined state on the upper side of the switching shaft. The gap between the two will form a V-shaped space. If the fiber falls into this space from the discharge port, it may accumulate here. By adding an arc-shaped baffle 33 to cover the inlet of this space, the fiber cannot fall, but falls on the arc-shaped baffle 33 and slides to the side along the arc surface of the arc-shaped baffle 33.

[0024] In this embodiment, air outlets 24 are provided at both the left and right ends of the upper part of the discharge hopper 4. An air supply pipe 25 is provided on the outer side of the discharge hopper 4. The two ends of the air supply pipe 25 are connected to the air outlets 24 on both sides respectively. An electrically controlled reversing valve 26 is connected to the middle of the air supply pipe 25. The input end of the electrically controlled reversing valve 26 is connected to an external air source. The electrically controlled reversing valve 26 is pulse-controlled by the control system, periodically switching the airflow direction to create alternating airflow within the discharge hopper 4 through the external air supply pipe 25. This airflow effectively disperses agglomerated fibers, causing them to move back and forth, and also carries away dust from the discharge hopper 4, reducing the likelihood of fibers adhering to the hopper walls due to electrostatic discharge. In this embodiment, a feeding adjustment mechanism is provided at the lower part of the discharge hopper 4. The feeding adjustment mechanism includes several adjustment components arranged along the length of the discharge hopper 4. Each adjustment component includes two symmetrically arranged baffles 28. The upper end of the baffle 28 is rotatably disposed on the inner wall of the discharge hopper 4, and the other end of the baffle 28 is hinged to an adjustment plate 29. The other end of the adjustment plate 29 is hinged to a drive block. An adjustment port 30 is opened on the inner wall of the discharge hopper 4. The drive block is slidably mounted on the adjustment port 30, and a drive frame 31 is slidably disposed on the outer side of the discharge hopper 4. Each drive block extends to connect with the drive frame 31. A telescopic cylinder 32 connected to the drive frame 31 is provided on the discharge hopper 4. Finally, the telescopic cylinder 32 drives all the baffles 28 to adjust their opening and closing angles synchronously, thereby achieving precise control of the material flow rate. The telescopic cylinder 32 drives the drive frame 31 to slide along the outside of the discharge hopper 4, causing all drive blocks to move synchronously. The drive blocks pull the baffle 28 around the hinge point through the adjusting plate 29, adjusting the opening and closing angle of the baffle 28 to achieve unified adjustment of multiple sets of baffles 28. By controlling the opening and closing degree of the baffle 28, the interval space between the two sets of adjusting components is adjusted, thereby changing the size of the drop outlet, accurately controlling the fiber drop flow rate, and ensuring that the deviation between the actual flow rate and the set flow rate is within a reasonable range. The working principle of this embodiment is as follows: According to the specifications of the UHPC fibers to be processed, the operator presets parameters (screen plate 23 matching specifications, target flow rate, vibration and airflow parameters, belt speed) through the control system; the control system instructs the second motor 22 to switch the matching screen plate 23 into the discharge hopper 4 and lock it, instructs the telescopic cylinder 32 to adjust the baffle 28 to the initial opening and closing angle corresponding to the target flow rate, and starts the air compressor to establish the initial airflow circulation through the electrically controlled reversing valve 26.

[0025] Fibers are poured into the feeding hopper 3 (the material level is monitored in real time, and a replenishment alarm is issued when the material level is low). The control system starts the first motor 7 and adjusts the speed according to the material level. The main shaft 6 drives the pusher plate 9 to push the fiber to the dispersion hopper 1. At the same time, the material guide teeth 8 rotate to break up large clumps of fiber, preparing for subsequent deep dispersion. The distribution plate 5 rotates with the main shaft 6, and the dispersion strip 27 combs the fiber and breaks up the clumps. The pusher plate 16 periodically pushes the material swinging component 11, and the material swinging plate 12 bounces back and throws the fiber to form a dispersion trajectory. The dispersion hopper 1 vibrates to help loosen the fiber, and the circulating airflow in the discharge hopper 4 blows away the clumps, finally forming a uniformly dispersed fiber flow. The dispersed fiber flow passes through the screen plate 23, and non-standard fiber clumps are intercepted, while qualified fibers fall. The weighing device transmits weight signals in real time. If the actual flow rate deviates from the set value, the control system instructs the telescopic cylinder 32 to adjust the opening angle of the baffle 28 to stabilize the flow rate within the target range.

[0026] This embodiment also provides a dispersion metering method applied to the above-mentioned multi-mode adaptive UHPC fiber dispersion metering device, including the following steps: S1. In the fiber dispersion stage, the first motor 7 is started to drive the main shaft 6 to rotate, which simultaneously drives the feeding teeth 8, the pushing plate 9 and the distributing plate 5 to rotate. The feeding teeth 8 radially disperses the fibers in the dispersion chamber 1, while the pushing plate 16 of the distributing plate 5 triggers the swaying assembly 11 to reciprocate and scatter through the inclined plane transmission, forming a three-dimensional dispersion trajectory. S2. Dynamic metering and adjustment: The weighing device of belt conveyor 2 monitors the fiber flow rate in real time and feeds it back to the control system; the frequency of vibration motor 20 and the speed of distribution plate 5 are automatically adjusted according to the preset ratio to control the feeding rate. S3. Grading and screening control: The second motor 22 drives the switching shaft 21 to rotate, selecting the screen plate 23 group that is suitable for the current fiber; the electrically controlled reversing valve 26 periodically switches the air supply direction according to the set time interval, so that compressed air is alternately sprayed from the air outlets 24 on the left and right sides of the discharge hopper 4, and blown through the air outlets 24 to the screen plate 23 to assist in dispersion and prevent blockage.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-mode adaptive UHPC fiber dispersion metering device, characterized by: Including dispersion bin and belt conveyor, the belt conveyor is equipped with a weigher on it to carry out real-time dynamic weighing of the fiber material on it, the upper and lower ends of the dispersion bin are respectively connected with a discharging bin and a discharge hopper, a discharge port communicated with the discharge hopper is formed in the middle of the dispersion bin, a distributing disc is rotatably arranged on the discharge port, a main shaft is arranged in the middle of the distributing disc, a first motor is mounted on the top of the discharging bin through a support, and the output shaft of the first motor is in transmission connection with the main shaft; A plurality of raking teeth are arranged on the outer circumferential surface of the main shaft in the dispersion bin, and the plurality of raking teeth are uniformly distributed along the circumference of the main shaft; a pushing plate is arranged on the outer circumferential surface of the main shaft in the discharging bin, a fan-shaped discharge port is formed in the distributing disc, and the main shaft drives the raking teeth, the pushing plate and the distributing disc to rotate synchronously when the main shaft rotates; a plurality of material swinging assemblies are distributed on the inner wall of the dispersion bin, and the material swinging assemblies are periodically raked to swing when the distributing disc rotates, so that the fiber is thrown upward to form a dispersion trajectory; an adjustable filtering assembly is arranged in the discharge hopper, and different specifications of sieve plates are switched to selectively sieve different fiber materials.

2. A multi-modal self-adapting UHPC fiber dispersion metering device according to claim 1, characterized in that: The material swinging assembly comprises an arc-shaped material swinging plate and a support frame, the upper end of the material swinging plate is hingedly arranged on the inner wall of the dispersion bin, a torsion spring mechanism is arranged at the hinge to enable the material swinging plate to automatically reset after being subjected to external force, and the support frame is fixedly arranged on the inner wall of the dispersion bin below the material swinging plate; a sliding groove is formed in the support frame, a sliding block is slidably arranged in the sliding groove, a wedge-shaped pushing block is connected to the bottom end of the sliding block, and the pushing block extends below the support frame; a plurality of inclined pushing plates are distributed on the top side end of the distributing disc, and the pushing plates and the pushing plate are provided with matching inclined surfaces, so that when the distributing disc rotates, the inclined surfaces of the pushing plates and the inclined surface of the pushing block are engaged to push, thereby driving the sliding block to horizontally displace, and a pull rope is connected between the top end of the sliding block and the bottom end of the material swinging plate.

3. A multi-modal adaptive UHPC fiber dispersion metering device according to claim 1, wherein: The dispersion bin is arranged on the belt conveyor through a plurality of spring members, and a plurality of vibration motors are mounted on the side end of the dispersion bin; the filtering assembly comprises a switching shaft and a second motor, the second motor is arranged on the side end of the discharge hopper and connected with the switching shaft, a plurality of groups of sieve plates are equally installed on the switching shaft, the sieve plates at the symmetrical positions have the same aperture specification, and the sieving module suitable for different fibers can be quickly selected by rotating the switching shaft.

4. A multi-modal self-adapting UHPC fiber dispersion metering device according to claim 3, wherein: The end surface of the discharge hopper top end abutting with the dispersion bin is in an inclined surface structure, an arc-shaped baffle is arranged in the middle of the top end of the discharge hopper, and the arc-shaped baffle is located directly above the switching shaft to avoid the fiber from falling between the inclined sieve plates on the upper side.

5. A multi-modal self-adapting UHPC fiber dispersion metering device according to claim 3, wherein: Air outlets are formed in the upper left and right ends of the discharge hopper, a gas conveying pipe is arranged outside the discharge hopper, the two ends of the gas conveying pipe are connected with the air outlets on the two sides respectively, and an electrically controlled reversing valve is connected to the middle of the gas conveying pipe.

6. A multi-modal adaptive UHPC fiber dispersion metering device according to claim 1, wherein: A plurality of dispersing strips with teeth are distributed on the upper end surface of the distributing disc.

7. A multi-modal adaptive UHPC fiber dispersion metering device according to claim 1, wherein: The lower part of the discharge hopper is provided with a discharging adjusting mechanism, which comprises a plurality of adjusting assemblies arranged along the length direction of the discharge hopper, each adjusting assembly comprises two symmetrically arranged baffles, the upper end of the baffle is rotationally arranged on the inner wall of the discharge hopper, the other end of the baffle is hingedly provided with an adjusting plate, the other end of the adjusting plate is hingedly connected with a driving block; the inner wall of the discharge hopper is provided with an adjusting opening, the driving block is slidingly assembled on the adjusting opening, and the outer side of the discharge hopper is slidingly provided with a driving frame, each driving block extends to be connected with the driving frame, the discharge hopper is provided with a telescopic cylinder connected with the driving frame, and finally all the baffles are synchronously adjusted in opening and closing angle by the telescopic cylinder, so that the precise control of the material flow is realized.

8. A dispersion metering method applied to the multi-mode adaptive UHPC fiber dispersion metering device of claim 5, characterized in that, The method comprises the following steps: S1. Fiber dispersion stage, start the first motor to drive the main shaft to rotate, synchronously drive the stirring teeth, pushing plate and distributing disc to rotate; the stirring teeth radially scatter the fibers in the dispersion bin, and the pushing plate of the distributing disc triggers the reciprocating throwing assembly through the inclined surface transmission to form a three-dimensional dispersion trajectory; S2. Dynamic metering adjustment, the weigher of the belt conveying device monitors the fiber flow in real time, and feeds back to the control system; according to the preset ratio, the frequency of the vibration motor and the rotating speed of the distributing disc are automatically adjusted to control the discharging rate; S3. Grading and screening control, the second motor drives the switching shaft to rotate, and selects the screen plate group suitable for the current fiber.

9. A method of dispensing a metered quantity according to claim 8, wherein: In S3, the electric control reversing valve periodically switches the air supply direction according to the set time interval, so that the compressed air is alternately sprayed from the air outlets on the left and right sides of the discharge hopper, and the screen plate is blown and dispersed through the air outlet to prevent clogging.

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