An apparatus and method for preparing ultra-high performance concrete

Abstract

This invention relates to the field of concrete preparation technology, specifically disclosing an apparatus and method for preparing ultra-high performance concrete, comprising: a tank body with several feed pipes at the top and a discharge pipe at the bottom; a mixing frame including a main shaft rotatably connected to the tank body, several connecting rods disposed on the side wall of the main shaft, a first roller disposed at the end of the connecting rods and rolling along the inner wall of the tank body, and a mixing paddle rotatably connected to the connecting rods and driven to rotate by each roller; a scraping assembly including a first scraper and a second scraper disposed at the end of the connecting rods and scraping along the inner wall of the tank body and the side wall of the first roller; and a driving component disposed outside the tank body and driving the main shaft to rotate. This invention solves the problem that in the traditional preparation process of energy-saving and sound-insulating concrete, sound-insulating fibers, rubber particles, etc., are easily agglomerated and adsorbed onto the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., during the mixing process, affecting the uniformity of concrete mixing.

Description

Technical Field

[0001] This application relates to the field of concrete preparation technology, and specifically discloses an apparatus and method for preparing ultra-high performance concrete. Background Technology

[0002] Concrete is an essential building material in all types of construction. Energy-saving and sound-insulating concrete, due to its low cost and excellent sound insulation performance, is widely used in residential buildings, commercial buildings, and roads. Current energy-saving and sound-insulating concrete mainly uses fly ash, slag powder, and silica fume to replace part of the cement, reducing cement usage and thus lowering energy consumption and carbon dioxide emissions. Simultaneously, sound-insulating fibers and rubber particles are mixed into the concrete during mixing. These additives can form tiny voids or elastic structures within the concrete, effectively absorbing and dispersing sound wave energy. For example, polypropylene fibers can improve the toughness and crack resistance of concrete, while also improving sound insulation performance; rubber particles can increase the elastic modulus of concrete, reducing the propagation speed of sound waves.

[0003] However, in the preparation process of this type of concrete, the uniform mixing of additives such as sound-insulating fibers and rubber particles with aggregates is particularly important to the performance of the concrete. Especially for ultra-high performance energy-saving sound-insulating concrete, all kinds of raw materials need to be weighed according to strict proportions, then mixed and stirred in a clean tank, and then poured and vibrated into molds to prepare precast concrete components for building construction. In this process, after the various raw materials are weighed, a factor that greatly affects the uniformity of mixing and the proportion of raw materials in subsequent processing is that sound-insulating fibers, rubber particles, etc. are easily agglomerated and adsorbed onto the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., and may even accumulate on the surface or corners of the concrete, thus affecting the uniformity of concrete mixing, that is, affecting the performance of the prepared concrete. Therefore, in view of this, the present invention provides an apparatus and method for preparing ultra-high performance concrete to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to solve the problem that in the traditional preparation process of energy-saving and sound-insulating concrete, sound-insulating fibers, rubber particles, etc. are easily agglomerated and adsorbed onto the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., which affects the uniformity of concrete mixing.

[0005] To achieve the above objectives, the basic solution of the present invention provides an apparatus for preparing ultra-high performance concrete, comprising:

[0006] The tank body has several inlet pipes at the top and an outlet pipe at the bottom.

[0007] The stirring rack includes a main shaft rotatably connected to the tank body, several connecting rods provided on the side wall of the main shaft, first rollers respectively provided at the ends of the connecting rods and rolling along the inner wall of the tank body, and stirring paddles respectively rotatably connected to the connecting rods and driven to rotate by each of the first rollers.

[0008] The scraping assembly includes a first scraper and a second scraper, which are respectively disposed at the end of the connecting rod and scrape along the inner wall of the tank and the side wall of the first roller, respectively.

[0009] The drive unit is located outside the tank and drives the main shaft to rotate.

[0010] The principle and effect of this basic scheme are as follows:

[0011] Compared with the prior art, the present invention sets a first roller on the mixing rack. When the driving component drives the mixing rack to mix the concrete in the tank, the first roller rolls along the inner wall of the tank. This not only crushes the sound insulation fibers, rubber particles, and other particles that are adsorbed and clumped on the inner wall of the tank, but also utilizes the friction between the first roller and the inner wall of the tank to make the first roller and the inner wall of the tank rotate relative to each other. This causes the first roller and the mixing paddle to rotate. The mixing paddle revolves around the main shaft under the drive of the main shaft and rotates on its own axis under the drive of the first roller. This promotes the mixing effect of the concrete in the tank along the radial direction of the tank and carries the crushed particles to the middle of the tank to fully mix with the concrete. This effectively solves the problem in the traditional preparation process of energy-saving sound insulation concrete, where sound insulation fibers, rubber particles, etc., are easily clumped and adsorbed to the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., during the mixing process, affecting the uniformity of concrete mixing.

[0012] Furthermore, the bottom of the tank is provided with an inclined guide cone surface, and the discharge pipe is located at the bottom of the guide cone surface. The mixing frame also includes several folding rods on the main shaft, mounting plates at the ends of the folding rods, and second rollers rotatably mounted on the mounting plates and rolling along the guide cone surface. The scraping assembly also includes a third scraper mounted on the mounting plate and scraping along the side wall of the second roller. This design avoids dead corners for concrete residue or various raw material residues in the tank. Simultaneously, the second roller, rolling along the guide cone surface, can crush clumps of sound-insulating fibers, rubber particles, and other particles adhering to the guide cone surface, further improving the uniformity of concrete mixing. The third scraper also removes substances adhering to the second roller.

[0013] Furthermore, the third scraper has a cavity, within which several wedges are slidably connected. Several first springs are installed between the wedges and the inner wall of the cavity. A pushing mechanism, extending into the cavity and intermittently pushing the wedges, is provided on the mounting plate. During the mixing process, the wall surface scraped by the third scraper and the second roller is located behind in the direction of rotation, experiencing less impact from the slurry. Raw material particles tend to accumulate at the contact point between the third scraper and the second roller. The pushing mechanism, first springs, and wedges are designed to push the wedges, thereby deforming the first springs. The elastic potential energy of the first springs causes a slight oscillation effect on the wall surface of the third scraper, thus removing the accumulated raw material particles.

[0014] Furthermore, the pushing mechanism includes a cam rotatably connected to the mounting plate and driven by the second roller, and a sliding frame slidably connected to the mounting plate. The sliding frame includes a push rod that fits against the side wall of the first cam, a sliding rod connected to the push rod, and a pressure rod disposed on the sliding rod and extending into the cavity. The bottom of the pressure rod has an inclined surface adapted to the wedge block. This allows the cam to rotate when the first roller rotates, thereby moving the push rod, sliding rod, and pressure rod. During this process, the elastic potential energy of the first spring helps the sliding frame as a whole to return to its original position.

[0015] Furthermore, the mounting plate is provided with a mounting disc for mounting the first cam. The second roller includes a first cylinder and a second cylinder respectively located on both sides of the mounting disc, with the first cylinder and the second cylinder on different mounting plates having different ratios. This allows multiple second rollers to cooperate with each other, completely crushing the guide cone surface, and forming an installation environment between each first cylinder and second cylinder to accommodate the mounting disc, avoiding contact between the mounting disc and the inner wall of the tank, the guide cone surface, or the first roller, thus preventing collisions or interference.

[0016] Furthermore, a roller brush is rotatably connected to the end of the connecting rod, located between the first scraper and the second scraper, and driven to rotate by the first roller. The roller brush is provided to facilitate the cleaning of raw material particles accumulated at the ends of the first and second scrapers.

[0017] Furthermore, the first scraper has a cavity, and its end has several guide holes. A sliding plate is slidably connected inside the cavity, and a second spring is provided between the sliding plate and the inner wall of the cavity. The sliding plate has several push pins that are slidably connected to the guide holes. The end of the connecting rod has a second cam that is driven to rotate by the first roller and pushes the sliding plate to move within the cavity. This further improves the cleaning effect on raw material particles adhering to the first scraper.

[0018] Furthermore, both the first and second scrapers have arc-shaped surfaces at their ends that fit the periphery of the roller brush. This further improves the cleaning effect on raw material particles adhering to the first and second scrapers.

[0019] Based on the same inventive concept, this invention discloses a method for preparing ultra-high performance concrete, which includes mixing and stirring ultra-high performance concrete using the above-mentioned preparation device.

[0020] Furthermore, the steps for mixing and stirring the ultra-high performance concrete using the aforementioned preparation device are as follows:

[0021] Step S1: Accurately weigh the rated weight of concrete raw materials according to the raw material ratio;

[0022] Step S2: Add aggregates with a fineness modulus between 2.3 and 3.0 and cement into the tank for mixing to form a uniform matrix, with the aggregate to cement ratio as follows;

[0023] Step S3: Sound insulation fibers with a fiber length between 6 and 25 mm and a diameter between 10 and 50 μm, and rubber particles with a particle size of 1-5 mm are gradually added into the tank and mixed with the matrix.

[0024] Step S4: Add water and additives into the tank and mix for 2-3 minutes. During this process, the drive unit drives the stirring frame to rotate, while the first roller rolls along the inner wall of the tank to crush the particles adsorbed on the inner wall of the tank. The stirring paddle revolves around the main shaft and rotates on its own axis under the drive of the first roller to stir the materials.

[0025] Step S5: Pour the concrete into the mold containing the reinforcing cage and vibrate it.

[0026] Step S6: After demolding, the precast concrete component is obtained.

[0027] In this method, when the driving component drives the mixing frame to mix the concrete in the tank, the first roller rolls along the inner wall of the tank. This not only crushes the agglomerated sound-insulating fibers, rubber particles, and other particles adsorbed on the inner wall of the tank, but also utilizes the friction between the first roller and the inner wall of the tank to make the first roller and the inner wall of the tank rotate relative to each other. This causes the first roller and the mixing paddle to rotate, so that the mixing paddle revolves around the main shaft under the drive of the main shaft and rotates on its own axis under the drive of the first roller. This promotes the mixing effect of the concrete in the tank along the radial direction of the tank and carries the crushed particles to the middle of the tank to fully mix with the concrete. This effectively solves the problem in the traditional preparation process of energy-saving sound-insulating concrete that sound-insulating fibers, rubber particles, etc. are easily agglomerated and adsorbed onto the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., during the mixing process, which affects the uniformity of concrete mixing. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A schematic diagram of a device for preparing ultra-high performance concrete according to an embodiment of this application is shown;

[0030] Figure 2 A schematic diagram of the interior of the tank in an embodiment of this application for preparing ultra-high performance concrete is shown.

[0031] Figure 3 A schematic diagram of the pushing mechanism in a preparation device for ultra-high performance concrete according to an embodiment of this application is shown;

[0032] Figure 4 This illustration shows a schematic diagram of the interior of the third scraper in an apparatus for preparing ultra-high performance concrete according to an embodiment of this application.

[0033] Figure 5 A schematic diagram of the first roller assembly in an ultra-high performance concrete preparation apparatus according to an embodiment of this application is shown.

[0034] Figure 6 This illustration shows a schematic diagram of the interior of the first scraper in an apparatus for preparing ultra-high performance concrete according to an embodiment of this application. Detailed Implementation

[0035] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0036] The reference numerals in the accompanying drawings of the instruction manual include: tank body 1, motor 2, feed pipe 3, discharge pipe 4, main shaft 5, connecting rod 6, first roller 7, folding rod 8, second roller 9, crossbar 10, stirring paddle 11, pressure rod 12, third scraper 13, mounting plate 14, second roller shaft 15, cam shaft 16, gear pair 17, first cam 18, push rod 19, guide sleeve 20, arc plate 21, wedge block 22, first spring 23, first roller shaft 24, second scraper 25, first scraper 26, arc surface 2601, sliding plate 2602, second spring 2603, push column 2604, guide rod 2605, roller brush 27, roller brush shaft 28, and shift fork 29.

[0037] An apparatus for preparing ultra-high performance concrete, implementing, for example... Figure 1As shown: It includes a tank body 1, a stirring rack on the tank body 1, a scraping assembly on the stirring rack, and a drive component for driving the stirring rack to rotate.

[0038] The tank body 1 has multiple feed pipes 3 at the top, an inclined guide cone surface at the bottom of the tank body 1, a discharge pipe 4 at the lowest point of the guide cone surface, and the tank body 1 is supported and fixed by multiple support feet.

[0039] like Figure 2 As shown, the stirring frame includes a main shaft 5 rotatably connected inside the tank 1, six connecting rods 6 on the side wall of the main shaft 5, first rollers 7 respectively located at the ends of the connecting rods 6 and rolling along the inner wall of the tank 1, and stirring paddles 11 rotatably connected to the connecting rods 6 and driven by each roller. The six connecting rods 6 are arranged in two layers, including three upper connecting rods 6 and three lower connecting rods 6, with the three upper connecting rods 6 located above the three lower connecting rods 6. When the first rollers 7 roll along the inner wall of the tank 1, they can crush the sound-insulating fibers, rubber particles, and other particles that are adsorbed and clumped on the inner wall of the tank 1. Correspondingly, the stirring frame also includes three folding rods 8 on the main shaft 5, mounting plates respectively located at the ends of the folding rods 8, and second rollers 9 rotatably mounted on the mounting plates and rolling along the guide cone surface. The second rollers 9, rolling along the guide cone surface, can crush the sound-insulating fibers, rubber particles, and other particles that are adsorbed and clumped on the guide cone surface.

[0040] Three folding rods 8 and six connecting rods 6 are located in different vertical positions, forming a shape in which the connecting rods and folding rods intersect in the horizontal plane. The folding rods 8, connecting rods 6 and the main shaft are all connected by mounting seats. The mounting seats are equipped with pressure springs that press the folding rods 8 and connecting rods against the outside, so that the first roller 7 and the second roller 9 are respectively in close contact with the inner wall of the tank 1 and the guide cone surface of the tank 1.

[0041] The scraping assembly includes a first scraper 26 and a second scraper 25 respectively disposed at the end of the connecting rod 6 and scraping along the inner wall of the tank body 1 and the side wall of the first roller 7, and a third scraper 13 disposed on the mounting plate and scraping along the side wall of the second roller 9.

[0042] During the mixing process, due to the obstruction of the first roller 7, the impact force of the slurry on the first scraper 26 and the second scraper 25 is relatively small. At the same time, the wall surface scraped by the third scraper 13 and the second roller 9 is located behind in the direction of rotation, and the impact force of the slurry on it is also relatively small. As a result, the raw material particles tend to accumulate and pile up at the contact points between the first scraper 26 and the inner wall of the tank 1, the contact points between the second scraper 25 and the first roller 7, and the contact points between the third scraper 13 and the second roller 9.

[0043] like Figure 2 and Figure 3As shown, the mounting plate is provided with a mounting disc 14, and the second roller 9 includes a first cylinder and a second cylinder respectively provided on both sides of the mounting disc 14. A gap is formed between the side of the mounting disc 14 near the guide cone surface and the guide cone surface. For different mounting plates, the first cylinder and the second cylinder on it have different ratios, so that the gap formed between the side of the mounting disc near the guide cone surface and the guide cone surface is located at different positions, thereby enabling multiple second rollers 9 to cooperate with each other and completely crush the guide cone surface. The mounting plate is provided with a pushing mechanism, which includes a camshaft 16 rotatably connected in the mounting plate 14, a first cam 18 on the camshaft 16, and a sliding frame that cooperates with the cam and is slidably connected to the mounting plate. The sliding frame includes a push rod 19 that fits against the side wall of the first cam 18, a sliding rod connected to the push rod 19, and a pressure rod 12 on the sliding rod. A second roller shaft 15 is provided between the first and second cylinders of the second roller 9, passing through the mounting plate 14. A gear pair 17 is provided between the second roller shaft 15 and the camshaft, located in the mounting plate 14 and meshing with each other. There are two gear pairs 17, which are located on both sides of the cam. The top of the mounting plate 14 is provided with a guide sleeve 20 for the push rod 19 to pass through.

[0044] like Figure 4 As shown, the bottom of the third scraper 13 is an arc-shaped plate 21 adapted to the second roller 9. The third scraper 13 has a cavity, and several wedges 22 are slidably connected in the cavity. The pressure rod 12 extends into the cavity and the bottom of the pressure rod 12 has an inclined surface adapted to the wedges 22. Several first springs 23 are provided on the wedges 22 and the inner wall of the cavity. When the second roller 9 rotates, it drives the first cam 18 to rotate through the gear pair 17, which in turn drives the push rod 19, the sliding rod and the pressure rod 12 to move, thereby pushing the wedges 22, which in turn causes the first springs 23 to deform. The elastic potential energy of the first springs 23 makes the wall of the third scraper 13 produce a slight oscillation effect, thereby removing the accumulated raw material particles.

[0045] like Figure 2 and Figure 5 As shown, the sliding frame is also provided with a crossbar 10, and the end of the crossbar 10 is provided with a fork 29 that is slidably connected to the end side wall of the first scraper 26. When the sliding frame slides, it also drives the fork 29 to move along the surface of the first scraper 26 to remove the raw material particles accumulated on the surface of the first scraper 26.

[0046] like Figure 5 and Figure 6As shown, a roller brush 27 is rotatably connected to the end of the connecting rod 6, located between the first scraper 26 and the second scraper 25 and driven to rotate by the first roller 7. The roller brush 27 has several bristles on its periphery. The ends of the first scraper 26 and the second scraper 25 are both provided with arc-shaped surfaces 2601 that are adapted to the periphery of the roller brush 27. The first scraper 26 has a cavity inside and several guide holes at its end. A sliding plate 2602 is slidably connected inside the cavity. The cavity is also provided with several guide rods 2605 that guide the sliding plate 2602. A second spring 2603 is provided between the sliding plate 2602 and the inner wall of the cavity. Several push pins 2604 that are slidably connected to the guide holes are provided on the sliding plate 2602. The end of the connecting rod 6 is provided with a second cam that is driven to rotate by the first roller 7 and pushes the sliding plate 2602 to move inside the cavity.

[0047] In this embodiment, the first roller 7 has a first roller shaft 24 in the middle, the roller brush 27 has a roller brush shaft 28 in the middle, and the stirring paddle 11 has stirring shafts at the top and bottom. The first roller shaft 24, the roller brush shaft 28, and the stirring shaft all extend into the upper connecting rod 6. The upper connecting rod 6 has a transmission cavity, and the transmission cavity has several meshing gear sets located between the first roller shaft 24 and the roller brush shaft 28, between the first roller shaft 24 and the stirring shaft, and between the roller brush shaft 28 and the second cam. The second cam is located inside the transmission cavity, and the top of the slide plate 2602 extends into the transmission cavity and engages with the second cam. The first roller 7 drives the roller brush and the second cam to rotate through the transmission of the first roller shaft 24 and the gear sets, so as to remove the raw material particles adhering to the first scraper 26 and the second scraper 25.

[0048] The first roller shaft 24, the brush shaft 28, and the stirring shaft are rotatably connected to the lower connecting rod 6. The stirring shaft includes a vertical section and a bent section between the vertical sections, with the two vertical sections coaxially arranged. The driving component is a motor 2 located outside the tank 1 and connected to the main shaft 5 via a coupling.

[0049] Motor 2 drives the entire mixing frame to rotate, causing the first roller 7 to roll along the inner wall of the tank 1, crushing the sound insulation fiber, rubber particles and other particles that are adsorbed and clumped on the inner wall of the tank 1. The mixing paddle 11 is driven to rotate through the gear set to improve the mixing effect of the concrete. At the same time, during the mixing process, the raw material particles adhering to the first scraper 26, the second scraper 25 and the third scraper 13 can be removed in time, thereby improving the mixing uniformity and finished product performance of the concrete.

[0050] Based on the same inventive concept, this embodiment discloses a method for preparing ultra-high performance concrete, including mixing and stirring the ultra-high performance concrete using the above-mentioned preparation device, with the following steps:

[0051] Step S1: Accurately weigh the concrete raw materials according to the rated weight, wherein the proportions of each raw material are as follows: cement 200-300 (kg / m³), fly ash / slag 100-150 (kg / m³), lightweight aggregate 500-800 (kg / m³), sound insulation fiber 0.6-1.8 (kg / m³), rubber granules 50-150 (kg / m³), and admixtures (foaming agent, water-reducing agent, etc.) 0.2%-0.5% (kg / m³).

[0052] Step S2: Add aggregate with a fineness modulus between 2.3 and 3.0 and cement into tank 1 for mixing to form a uniform matrix, with the aggregate to cement ratio as follows;

[0053] Step S3: Sound insulation fibers with a fiber length between 6 and 25 mm and a diameter between 10 and 50 μm, and rubber particles with a particle size of 1-5 mm are gradually added into the tank 1 and mixed with the matrix.

[0054] Step S4: Add water and additives to tank 1 and mix for 2-3 minutes. During this process, the drive unit drives the stirring frame to rotate, while the first roller 7 rolls along the inner wall of tank 1, crushing the clumps of particles adsorbed on the inner wall of tank 1. The stirring paddle 11, driven by the main shaft 5, revolves around the axis of the main shaft 5 and rotates on its own axis under the drive of the first roller 7 to stir the materials. The first roller 7, through the transmission of the first roller shaft 24 and the gear set, drives the cylinder brush to rotate and the second cam to rotate, so as to stir the first scraper 26 and the second scraper 2. The raw material particles adhering to the roller 5 are removed. When the second roller 9 rotates, it drives the first cam 18 to rotate through the gear pair 17, which in turn drives the push rod 19, sliding rod and pressure rod 12 to move, which in turn pushes the wedge block 22, which in turn drives the first spring 23 to deform. The elastic potential energy of the first spring 23 causes the wall surface of the third scraper 13 to produce a slight oscillation effect, thereby removing the accumulated raw material particles, and drives the fork 29 to move along the surface of the first scraper 26 to further remove the raw material particles accumulated on the surface of the first scraper 26.

[0055] Step S5: Pour the concrete into the mold containing the reinforcing cage and vibrate it.

[0056] Step S6: After demolding, the precast concrete component is obtained.

[0057] In this method, when the driving component drives the mixing frame to mix the concrete in the tank 1, the first roller 7 rolls along the inner wall of the tank 1. This not only crushes the sound insulation fibers, rubber particles, and other particles that are adsorbed and clumped together on the inner wall of the tank 1, but also utilizes the friction between the first roller 7 and the inner wall of the tank 1 to make the first roller 7 and the inner wall of the tank 1 rotate relative to each other. This causes the first roller 7 and the mixing paddle 11 to rotate. The mixing paddle 11 revolves around the axis of the main shaft 5 under the drive of the main shaft 5 and rotates on its own axis under the drive of the first roller 7. This promotes the mixing effect of the concrete in the tank 1 along the radial direction of the tank 1 and carries the crushed particles to the middle of the tank 1 to fully mix with the concrete. This effectively solves the problem that in the traditional preparation process of energy-saving sound insulation concrete, sound insulation fibers, rubber particles, etc. are easily agglomerated and adsorbed onto the inner wall of the mixing tank due to static electricity, liquid viscosity, etc., which affects the uniformity of concrete mixing.

[0058] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for preparing ultra-high performance concrete, characterized in that, include: The tank body has several inlet pipes at the top and an outlet pipe at the bottom. The stirring rack includes a main shaft rotatably connected to the tank body, several connecting rods provided on the side wall of the main shaft, first rollers respectively provided at the ends of the connecting rods and rolling along the inner wall of the tank body, and stirring paddles respectively rotatably connected to the connecting rods and driven to rotate by each of the first rollers. The scraping assembly includes a first scraper and a second scraper, which are respectively disposed at the end of the connecting rod and scrape along the inner wall of the tank and the side wall of the first roller, respectively. The driving component is located outside the tank and drives the main shaft to rotate. The tank body has an inclined guide cone surface at the bottom, the discharge pipe is located at the bottom of the guide cone surface, the stirring frame also includes several folding rods on the main shaft, mounting plates respectively located at the ends of the folding rods, and second rollers respectively rotatably mounted on the mounting plates and rolling along the guide cone surface, the scraping assembly also includes a third scraper located on the mounting plate and scraping along the side wall of the second roller, the third scraper has a cavity, several wedges are slidably connected in the cavity, several first springs are provided between the wedges and the inner wall of the cavity, and the mounting plate is provided with a pushing mechanism that can extend into the cavity and intermittently push the wedges; The pushing mechanism includes a first cam rotatably connected to the mounting plate and driven by a second roller, and a sliding frame slidably connected to the mounting plate. The sliding frame includes a push rod that fits against the side wall of the first cam, a sliding rod connected to the push rod, and a pressure rod provided on the sliding rod and extending into the cavity. The bottom of the pressure rod is provided with an inclined surface adapted to the wedge.

2. The apparatus for preparing ultra-high performance concrete according to claim 1, characterized in that, The mounting plate is provided with a mounting disc for mounting the first cam. The second roller includes a first cylinder and a second cylinder respectively located on both sides of the mounting disc. The first cylinder and the second cylinder located on different mounting plates have different ratios, so that the gap formed between the side of the mounting disc near the guide cone and the guide cone is located at different positions, thereby enabling multiple second rollers to cooperate with each other and completely crush the guide cone.

3. The apparatus for preparing ultra-high performance concrete according to claim 1, characterized in that, The end of the connecting rod is rotatably connected to a roller brush located between the first scraper and the second scraper and driven to rotate by the first roller.

4. The apparatus for preparing ultra-high performance concrete according to claim 3, characterized in that, The first scraper has a cavity inside, and the end of the first scraper has several guide holes. A slide plate is slidably connected inside the cavity. A second spring is provided between the slide plate and the inner wall of the cavity. The slide plate has several push pins that are slidably connected to the guide holes. The end of the connecting rod is provided with a second cam that is driven to rotate by the first roller and pushes the slide plate to move inside the cavity.

5. The apparatus for preparing ultra-high performance concrete according to claim 3, characterized in that, The ends of the first scraper and the second scraper are both provided with arc-shaped surfaces that are adapted to the periphery of the roller brush.

6. A method for preparing ultra-high performance concrete, characterized in that, This includes mixing and stirring ultra-high performance concrete using the preparation apparatus described in any one of claims 1-5.

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