Energy-saving intelligent high-mixing control asphalt material preparation equipment and method

Abstract

The invention discloses energy-saving intelligent high-mixing control asphalt material preparation equipment and method. The equipment comprises a multi-stage screening mechanism, a storage mechanism, a mixing mechanism, a vibrating screen and multi-stage screens with different screen hole diameters, and aggregates are distinguished according to different particle sizes; during vibration screening, aggregate with changeable positions bounces on the vibration screen, the aggregate enters the corresponding types of screen holes at different parts through the various types of screen holes, efficient and high-precision screening is achieved, the different parts of the aggregate make contact with the screen through the changeable-shape non-blocking screen holes and the rolling section, and the time for making contact with the screen in a vibration mode is prolonged. Efficient and precise screening of the aggregate is achieved; in the process that the rotating hopper drives the aggregate to do centrifugal motion, the aggregate is turned over and dispersed under the action of the protruding parts, and similarly, the aggregate is turned over and dispersed and mixed when falling and converging, so that efficient mixing of the aggregate with different particle sizes is further achieved, automatic high mixing of the aggregate is completed, the subsequent stirring and mixing time is shortened, and sufficient and efficient utilization of the aggregate is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy-saving preparation equipment for asphalt, and particularly relates to an energy-saving intelligent high-mix control asphalt mixture preparation equipment and method. Background Art

[0002] Asphalt mixture is the core material for constructing flexible pavements such as modern highways, airport runways, and parking lots. It mainly consists of aggregates (crushed stones, sand), asphalt binder, fillers (mineral powder), and optional additives (such as fibers, anti-stripping agents), and is paved and compacted after high-temperature mixing.

[0003] During preparation, generally, aggregates of different particle sizes are stored in a cold storage bin before the mixture, and then the conveyor belt sends the aggregates into a drying drum, where they are heated at a high temperature by a burner to remove moisture, and then sent to a screening system by a hoist, so as to achieve heat preservation and screening, and then mixing, as well as subsequent storage and transportation. For example, the patent document with the authorization announcement number CN118854739B discloses a production process, equipment, and system for plant-mixed warm and hot recycled asphalt mixtures.

[0004] In the production process of asphalt mixtures, the screening and mixing links are crucial, directly determining the gradation uniformity, road performance (such as strength, durability), and construction quality of the mixtures. At present, the screening and mixing structure of asphalt aggregates is relatively simple. Generally, the aggregates enter a multi-layer vibrating screen, and the apertures of the multi-layer screen meshes are different for step-by-step screening. Aggregates of each particle size fall into the corresponding bins, and then enter a mixing and stirring tank for mixing according to the required aggregate ratio.

[0005] For example, the Chinese patent document with the authorization announcement number CN 221626725 U discloses a mixture mixing device with multi-stage pre-screening. By setting multi-stage sieve plates, the crushed stones smaller than the size of the filter holes of the filter plate can fall into the screening tank through the filter holes and then be discharged from the discharge tank, and the crushed stones larger than the size of the filter holes of the filter plate continue to move along the filter plate until they are discharged from the discharge port. During multi-stage screening, the screened crushed stones can be directly discharged from the screening box, facilitating the continuous screening process of the crushed stones and improving the screening efficiency of the device.

[0006] Another example is the Chinese patent document with the authorization announcement number CN 213001082 U, which discloses an old asphalt mixture screening and drying device. The screening mechanism includes a vibrator and a screening box. The vibrator is connected to the screening box, and the screen is inclined towards the drying tank. The top of the drying tank is connected to the screen, and the bottom of the drying tank extends towards the collection box; the screen holes of the collection box corresponding to the screen are larger than those of the lower-layer screen and smaller than the aperture of the asphalt particles within the target aperture range, for multi-stage screening of a large amount of old asphalt mixture, and the entire screening process is very convenient and efficient.

[0007] However, the above-mentioned screening and mixing preparation technical solution still has the following deficiencies during actual operation: 1. The screen structure is simple and the screen holes are single. Due to the diverse shapes of the aggregates, it is difficult to adapt to the passing of the changing aggregates, resulting in insufficient and inaccurate utilization of the aggregates; 2. When the aggregates contact the screen during vibration, the holes are easily blocked, which will interfere with the screening quality and efficiency, causing energy waste; 3. Some aggregates are carried by the movement of other bone particles and do not fully bounce and contact the screen, and directly enter the non-corresponding aggregate bin downward without being screened, affecting the screening quality; 4. During the period when the aggregates bounce on the screen, it is difficult to be fully screened and enter the corresponding aggregate bin; 5. After the aggregates are screened, they are generally directly stirred, lacking efficient premixing. Since the aggregates are separated when feeding and have different particle sizes, segregation is likely to occur during stirring, affecting the mixing quality and efficiency of stirring. Summary of the Invention

[0008] The present invention provides an energy-saving intelligent high-mixing control asphalt mixture preparation device and method. Through the non-blocking screen holes with diverse shapes, combined with the tumbling section to make different parts of the aggregates contact the screen and extend the vibration contact time with the screen, efficient and accurate screening of the aggregates is achieved; during the process of the rotating hopper driving the aggregates to move centrifugally, the aggregates tumble and disperse under the action of the convex parts. Similarly, the aggregates will also tumble and disperse when descending and converging, further realizing the efficient mixing of aggregates with different particle sizes, completing the automatic high-mixing of the aggregates, reducing the subsequent stirring and mixing time, and achieving high-quality mixed materials, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: An energy-saving intelligent high-mixing control asphalt mixture preparation device, comprising a multi-stage screening mechanism, a storage mechanism, and a mixing mechanism; The multi-stage screening mechanism includes multiple layers of vibrating screens and a vibrating housing. Screen holes are provided on each layer of the vibrating screens. The aperture of the screen holes on each layer of the vibrating screen is different, and the aperture of the upper layer of the screen holes is larger than that of the lower layer of the screen holes, forming a multi-stage screen; And the screen holes on each layer of the vibrating screen include various shapes; An inlet and a waste collection area are provided above the vibrating housing; The storage mechanism includes a plurality of aggregate bins, which are composed of a plurality of partitions arranged in the vibrating housing. The upper part of the partition is lapped with the corresponding vibrating screen, and the lower end leads to the lower outlet of the vibrating housing to form a plurality of discharge ports, and the opening degree or the feeding speed is controlled by an intelligent control discharge door; The mixing mechanism includes a mixing box. A mixing inlet is provided at the top end of the mixing box, and two stirrers are installed inside the mixing box, and stirring blades are installed on the stirrers; The mixing box also includes a filler inlet and an asphalt inlet.

[0010] Preferably, the cross-section of the sieve holes of each layer of vibrating screen mesh is designed with a larger upper part and a smaller lower part, that is, each sieve hole includes an upper hole edge and a lower hole edge, and the diameter of the upper hole edge is greater than that of the lower hole edge. At the same time, the aperture gradually transitions from the upper hole edge to the lower hole edge.

[0011] Preferably, the vibrating screen mesh is a polyurethane screen mesh, and a support skeleton is integrally connected to the lower part.

[0012] Preferably, the overall cross-section of the vibrating screen mesh is in an arc structure and gradually slopes downward from the feed end to the other end. The vibrating screen mesh includes a flat section at the feed part and a tumbling section located below the flat section, and multiple grooves are arranged on the tumbling section.

[0013] Preferably, the vibrating screen mesh further includes a bouncing section located below the tumbling section, and multiple groups of small grooves are arranged on the surface of the bouncing section.

[0014] Preferably, for the bouncing section of the vibrating screen mesh, both its upper and lower surfaces are designed with small grooves.

[0015] Preferably, a high-speed mixing mechanism is further arranged between the storage mechanism and the mixing mechanism. The high-speed mixing mechanism includes a rotating hopper. The rotating hopper is located below the vibrating housing. An intelligent control valve is arranged at the discharge port below the rotating hopper, and a drive for driving the rotating hopper to rotate is configured outside.

[0016] Preferably, a plurality of protruding parts are arranged on the inner wall of the rotating hopper. The protruding parts are evenly spaced, and the spacing distance between the protruding parts is greater than the maximum particle size of the aggregate.

[0017] Preferably, the stirring blades of the two stirrers are spirally distributed around the axis of the stirrer in multiple numbers. The two stirrers rotate in different directions, and the stirring blades are arranged in a staggered manner.

[0018] A preparation method of an energy-saving intelligent high-speed mixing control asphalt mixture preparation device based on any one of the above, includes the following steps: S1, feeding the mixed aggregate to be screened into the top layer of the vibrating screen mesh; S2, the multi-stage vibrating screen mesh differentiates the aggregate according to different particle sizes and screens the aggregates with different particle sizes to the corresponding layer; S3, during vibrating screening, the sieve holes of various types at various places enable the aggregate to enter the corresponding type of sieve holes at different positions, achieving efficient and high-precision screening; S4, during vibrating screening, the cross-section of the sieve holes of each layer of vibrating screen mesh is designed with a larger upper part and a smaller lower part. With vibration, the aggregate is easily separated from the sieve holes and thus not easily blocked; S5, during the vibrating screening process, the tumbling section causes the aggregate to tumble and fall multiple times. Different aggregates tumble and jump in multiple directions and contact the screen mesh, being fully and accurately screened; S6. After the aggregate tumbles and is screened, it enters the bouncing section. While the aggregate vibrates downward, it repeatedly bounces up and down between the small grooves of the upper and lower sieves multiple times, further increasing the number of bounces and prolonging the contact time between the aggregate and the sieve. Driven by the subsequent bone particles, after sufficient bouncing, it enters the aggregate bin. S7. The aggregate bin feeds the screened aggregate into the rotating hopper through the intelligent control discharge gate to control the opening degree or feeding according to a set weight ratio. During the process of the rotating hopper driving the aggregate to move centrifugally, the aggregate tumbles and disperses under the action of the protrusions. Similarly, when the aggregate descends and converges, it also tumbles and disperses and mixes, further realizing the efficient mixing of aggregates with different particle sizes and completing the automatic high - mixing of aggregates. S8. The highly - mixed aggregate collected under the rotating hopper enters the mixing box after the intelligent control valve is opened. S9. The mixing box drives two stirrers to rotate through external conventional drive, further driving the stirring blades to rotate to stir and mix the aggregate evenly. During mixing, fillers and asphalt are added, and the fillers and asphalt are also added according to the ratio. S10. The stirrer drives the aggregate to move from front to back through the helically - distributed stirring blades, while on the other side, it moves from back to front, realizing the rotational cyclic stirring of the bone particles in the mixing box, further achieving efficient mixing. After mixing is completed, it discharges from the lower outlet of the mixing box to complete the blanking and proceed to the next process.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. During vibrating screening, for the aggregate with variable bouncing positions on the vibrating sieve, various types of sieve holes at different positions enable the aggregate to enter the corresponding type of sieve holes at different parts, achieving efficient and high - precision screening. Cooperating with the intelligent valve to efficiently control the mixing amount, the bone particles are fully and precisely utilized.

[0020] 2. During vibrating screening, the cross - section of the sieve holes of each layer of the vibrating sieve is designed to be larger at the top and smaller at the bottom. Cooperating with vibration, the aggregate is easy to break away from the sieve holes, thus not easily blocked, improving the screening quality and efficiency and saving energy.

[0021] 3. During the vibrating screening process, the aggregate gradually accelerates downward and enters the tumbling section. The tumbling section makes the aggregate tumble and fall multiple times. Different aggregates tumble and bounce in multiple directions and contact the sieve, being fully and precisely screened.

[0022] 4. After the aggregate tumbles and is screened, it enters the bouncing section. The design with small grooves on both the upper and lower sides of the contact sieve enables the aggregate to repeatedly bounce up and down between the small grooves of the upper and lower sieves while vibrating downward, further increasing the number of bounces and prolonging the contact time between the aggregate and the sieve. Driven by the subsequent bone particles, after sufficient bouncing, it enters the aggregate bin.

[0023] 5. The sieve holes of variable shapes without blockage in the present application, combined with the tumbling section, enable different parts of the aggregate to contact the sieve mesh and extend the vibration contact time with the sieve mesh, achieving efficient and accurate screening of the aggregate.

[0024] 6. During the process of the rotating hopper driving the aggregate to move centrifugally, the aggregate tumbles and disperses under the action of the protrusions. Similarly, when the aggregate descends and converges, it also tumbles and disperses and mixes, further realizing efficient mixing of aggregates of different particle sizes, completing automatic high-quality mixing of the aggregate, reducing the subsequent stirring and mixing time, avoiding segregation, and achieving high-quality mixing.

[0025] 7. The stirring blades of both stirrers are spirally distributed around the axis of the stirrer. When rotating, while the mixture tumbles up and down and left and right, the stirrer drives the aggregate to move from front to back through the spirally distributed stirring blades, and on the other side, it moves from back to front, realizing the rotational cyclic stirring of the aggregate in the mixing box and further achieving efficient mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the front sectional view structural schematic diagram of the present invention; Figure 2 is the partial top view schematic diagram of the upper vibrating sieve mesh; Figure 3 is Figure 2 the cross-sectional structural schematic diagram at A of Figure 4 is Figure 2 the partial top view structural schematic diagram of the lower vibrating sieve mesh of Figure 5 is the structural schematic diagram of the two-layer vibrating sieve mesh of an embodiment of the present invention; Figure 6 is the top view schematic diagram of the rotating hopper of an embodiment of the present invention; Figure 7 is the schematic diagram of the screening and mixing method of an embodiment of the present invention.

[0027] In the figure: 1. Vibrating sieve mesh; 101. Sieve hole; 1011. Upper hole edge; 1012. Lower hole edge; 102. Support skeleton; 1031. Flattening section; 1032. Tumbling section; 1033. Bouncing section; 2. Vibration housing; 3. Feed inlet; 4. Waste collection area; 5. Aggregate bin; 6. Partition board; 7. Intelligent control discharge door; 8. Mixing box; 801. Mixing inlet; 802. Stirrer; 8021. Stirring blade; 803. Filler inlet; 804. Asphalt inlet; 9. Rotating hopper; 901. Intelligent control valve; 902. Protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-2 、 Figure 4 , the present invention provides an energy-saving intelligent high-mix control asphalt mixture preparation device, including a multi-stage screening mechanism, a storage mechanism, and a mixing mechanism; The multi-stage screening mechanism includes multiple layers of vibrating screens 1 and a vibrating housing 2. The number of layers of the vibrating screens 1 is set according to the number of categories of aggregate screening required, and the quantity corresponds. The aggregates are classified according to different particle sizes. The multiple layers of vibrating screens 1 are arranged at intervals up and down and are all installed in the vibrating housing 2. Sieve holes 101 are provided on each layer of the vibrating screens 1. The aperture of the sieve holes 101 on each layer of the vibrating screens 1 is different, and the aperture of the sieve holes 101 on the upper layer is larger than that on the lower layer, forming a multi-stage sieve mesh. The purpose is to allow the mixed aggregates to be screened to enter from the uppermost layer of the vibrating screen 1. The aperture of the sieve holes 101 is designed to match the particle size of the screened aggregates, that is, the aggregates will pass through the sieve holes 101 larger than their maximum particle size and be blocked by the vibrating screen 1 with sieve holes smaller than their particle size. In this way, the multiple layers of vibrating screens 1 form a multi-stage sieve mesh for distinguishing the aggregates according to different particle sizes and screening the aggregates of different particle sizes to the corresponding layer; Furthermore, the sieve holes 101 on each layer of the vibrating screen 1 cover the entire screen, and the sieve holes 101 on each layer of the vibrating screen 1 include various shapes, at least including circular, regular polygon, and square. Currently, the vibrating screens 1 all have single-type sieve holes. Due to the diverse shapes of the aggregates, for example, when there are only circular sieve holes, aggregates with a long and narrow shape, although small in overall particle size, are difficult to pass through the circular sieve holes. If square or diamond-shaped sieve holes are set, when the aperture is similar to the diameter of the circular sieve holes, their diagonals can be used to pass the long and narrow aggregates. By setting diverse sieve holes on one vibrating screen 1, the aggregates can enter the corresponding layer efficiently.

[0030] The sieve holes 101 of various shapes on the vibrating screen 1 are evenly arranged, and the adjacent four sides of the sieve holes 101 of the same shape are all sieve holes 101 of other types. Such a design enables different types of sieve holes 101 to be distributed everywhere on the vibrating screen 1. When the aggregates jump on the vibrating screen 1, their positions are variable, and the sieve holes 101 of various types everywhere are likely to allow the aggregates to enter the corresponding type of sieve holes at different positions.

[0031] The vibrating housing 2 realizes the vibration of the internal vibrating screen 1 through an externally installed vibrator. It is a conventional structure and will not be described in detail. At the same time, it is not limited to the above vibration method. The vibrating housing 2 is fixed at the asphalt mixture processing site through an external fixing mechanism, such as being supported by a support frame.

[0032] A feed inlet 3 is arranged above the vibrating housing 2, and an openable sealing door is preferably installed thereon. The purpose is to allow the material that has not passed through the screening to enter the waste collection area 4. The openable sealing door is provided for taking out the waste after being opened later. The vibrating housing 2 is a heat-insulating structure. The purpose is to maintain the temperature during the screening of the internal aggregate, reduce the energy loss during the screening process. The aggregate is first stored in the cold feed bin before the mixture, and then the conveyor belt sends the aggregate into the drying drum, where it is heated by a burner at high temperature to remove moisture, and then sent to the screening system by a hoist, so as to achieve heat-insulating screening. The storage mechanism includes a plurality of aggregate bins 5. The aggregate bins 5 are composed of a plurality of partitions 6 arranged in the vibrating housing 2. The upper part of the partition 6 is lapped with the corresponding vibrating screen 1, and the lower end leads to the lower outlet of the vibrating housing 2 to form a plurality of discharge ports. A weighing sensor is installed below the discharge port to monitor the discharging weight in real time. The opening degree or feeding speed is controlled by an intelligent control discharge door 7, which is used to mix the screened aggregate according to the set weight ratio after controlling the opening degree or feeding by the intelligent control discharge door 7.

[0033] The mixing mechanism includes a mixing box 8. The top of the mixing box 8 is provided with a mixing inlet 801. Two stirrers 802 are installed inside the mixing box 8. Stirring blades 8021 are installed on the stirrers 802. The two stirrers 802 are driven to rotate by an external conventional drive, and further drive the stirring blades 8021 to rotate to stir and mix the aggregate evenly.

[0034] The mixing box 8 also includes a filler inlet 803 and an asphalt inlet 804, which are used to add filler and asphalt during mixing. The filler and asphalt are also added according to the ratio. The filler fills the gaps between the aggregates, improves the density, forms a slurry with the asphalt, enhances the bonding force and the ability to resist water damage. The filler also includes various additives; the asphalt is used to bond the aggregates and the filler to form the overall strength; the filler and asphalt provide the flexibility and fatigue resistance of the mixture. They jointly determine the mechanical properties, durability and construction performance of the mixture.

[0035] Please refer to Figure 3, as an embodiment of the present invention, the cross-section of the sieve holes 101 of each layer of vibrating screen mesh 1 is designed to be larger at the top and smaller at the bottom. That is, each sieve hole 101 includes an upper hole edge 1011 and a lower hole edge 1012, and the diameter of the upper hole edge 1011 is greater than that of the lower hole edge 1012. At the same time, the aperture gradually transitions from the upper hole edge 1011 to the lower hole edge 1012. When the aggregate vibrates on the screen mesh, the direction is variable, and it will also be impacted by bone particles in other directions. Currently, due to the single sieve holes of the screen mesh and the consistent aperture of a single hole, although the vibrating screen mesh 1 vibrates, it is still prone to clogging, which will affect the screening effect, that is, the aggregate is not screened due to clogging of the holes and directly enters the aggregate bin that does not belong to its particle size, and at the same time affects the screening efficiency. By having the diameter of the upper hole edge 1011 of each sieve hole 101 greater than that of the lower hole edge 1012 and the aperture gradually transitioning from the upper hole edge 1011 to the lower hole edge 1012, when the aggregate gets stuck in the sieve hole 101, due to the design of the hole gradually opening upwards, the aggregate will receive an upward extrusion component force from the inclined plane between the upper hole edge 1011 and the lower hole edge 1012. When combined with vibration, the aggregate is easily separated from the sieve hole and thus is not easily blocked.

[0036] Please refer to Figure 1 , as an embodiment of the present invention, the vibrating screen mesh 1 is a polyurethane screen mesh, and a support skeleton 102 is integrally connected to the lower part. The elasticity of polyurethane causes the screen mesh to produce micro-deformation during vibration, further effectively preventing fine particles from clogging the sieve holes and maintaining the screening efficiency. At the same time, it has a high elastic modulus and can absorb the impact force of the material, reducing damage caused by the impact of large particles falling. By setting the support skeleton 102, the overall support for the vibrating screen mesh 1 can be maintained.

[0037] Please refer to Figure 5 , as an embodiment of the present invention, the overall cross-section of the vibrating screen mesh 1 is in an arc structure and gradually slopes downwards from the feed end to the other end. The inclination angle is preferably 5° - 15°. When the proportion of coarse particles is high, the angle is appropriately reduced to avoid insufficient screening caused by passing too quickly.

[0038] Furthermore, the vibrating screen mesh 1 includes a flat section 1031 at the feed part and a tumbling section 1032 located below the flat section 1031. The flat section 1031 is used to synchronously guide the aggregate into the screen mesh and then into the inlet of the aggregate bin 5, and then it enters the tumbling section 1032 downward. The tumbling section 1032 is provided with a plurality of grooves, and the design of the grooves being larger than the maximum particle size of the bone particles is such that after the aggregate is guided downward and jumps, the aggregate gradually accelerates downward and enters the tumbling section 1032. The tumbling section 1032 is conducive to the aggregate tumbling multiple times. After the aggregate tumbles out, it is blocked by the upper layer of the screen mesh and will enter the grooves below the tumbling section again. When tumbling and falling multiple times, different aggregates tumble in multiple directions and contact the screen mesh, avoiding some aggregates not fully jumping and contacting the screen mesh and not being screened and directly entering the non-corresponding aggregate bin downward.

[0039] Please refer to Figure 5 , as an embodiment of the present invention, the vibrating screen mesh 1 further includes a bouncing section 1033 located below the tumbling section 1032. Multiple small grooves are provided on the surface of the bouncing section 1033. Since the aggregate gradually tumbles downward after passing through the leveling section 1031 and the tumbling section 1032, and due to the collision of the subsequent aggregate, it still has a relatively fast speed and is still likely to be carried into the non-corresponding aggregate bin by other aggregates without sufficient contact with the screen. By providing the bouncing section 1033 with multiple small grooves, when the aggregate enters the bouncing section 1033, it will be subjected to an upward elastic force towards the upper screen. Then, after the aggregate contacts the bouncing section 1033, it will collide with the upper screen and perform multiple bounces between the bouncing section 1033 and the upper screen before entering the aggregate bin 5 downward. Thus, the aggregate can fully bounce and contact the screen, and after being fully screened, it enters the corresponding aggregate bin 5.

[0040] Please refer to Figure 5 , as an embodiment of the present invention, for the bouncing section of the vibrating screen mesh 1, both its upper and lower surfaces are designed with small grooves. The size of the small grooves (i.e., the opening spacing formed by adjacent wave crests) is preferably smaller than the particle size of the smallest-sized bone particles. Such a design enables the aggregate to bounce multiple times between the upper and lower screen small grooves while vibrating and descending, further increasing the number of bounces and prolonging the contact time between the aggregate and the screen. Driven by the subsequent bone particles, after sufficient bouncing, it enters the aggregate bin 5.

[0041] Please refer to Figures 1-6 , as an embodiment of the present invention, a high-mixing mechanism is further provided between the storage mechanism and the mixing mechanism. The high-mixing mechanism includes a rotating hopper 9. The rotating hopper 9 is located below the vibrating housing 2. An intelligent control valve 901 is provided at the discharge port below the rotating hopper 9. After the aggregate bin 5 discharges aggregates of different particle sizes and weights according to requirements and enters the rotating hopper 9, the rotating hopper 9 can be rotatably fixed on an external conventional support frame through bearings. A drive configured to drive the rotating hopper 9 to rotate is provided on the support frame, such as a reciprocating motor. A gear is provided around the outer wall of the rotating hopper 9, and the reciprocating motor drives the rotating hopper 9 to reciprocate through the engagement of the driving gear and the gear of the rotating hopper 9. The reciprocating motion is to rotate clockwise and counterclockwise reciprocally, enabling aggregates of different particle sizes to perform a two-way centrifugal rotational motion in the rotating hopper 9. During the centrifugal motion, the aggregates will disperse outward and converge downward after stopping the rotation. After multiple reciprocating rotations, high-efficiency mixing is achieved. Preferably, a hopper edge of a certain height is provided upward at the top of the rotating hopper 9, and the top of the hopper edge is close to the lower part of the vibrating housing 2. A seal can be provided if necessary to prevent the aggregates from being thrown out during centrifugal rotation.

[0042] Please refer to Figure 6, as an embodiment of the present invention, a plurality of protruding portions 902 are provided on the inner wall of the rotary hopper 9. The protruding portions 902 are evenly spaced. Preferably, the protruding portions 902 are conical protrusions or circular protrusions. The spacing distance of the protruding portions 902 is greater than the maximum particle size of the aggregate. The purpose is that during the process of the rotary hopper 9 driving the aggregate to move centrifugally, the aggregate will roll and disperse under the action of the protruding portions 902. Similarly, when the aggregate descends and converges, it will also roll and mix, further realizing efficient mixing.

[0043] Please refer to Figure 1 , as an embodiment of the present invention, a plurality of stirring blades 8021 of the two stirrers 802 are spirally distributed around the axis of the stirrer 802. The two stirrers 802 rotate in different directions, and the stirring blades 8021 are arranged in a staggered manner. When the left stirrer 802 rotates clockwise, the right stirrer 802 rotates counterclockwise. Thus, when stirring and mixing, while the mixture rolls up and down and left and right, the stirrer 802 drives the aggregate to move from front to back through the spirally distributed stirring blades 8021, and on the other side from back to front, realizing the rotary cyclic stirring of the bone particles in the mixing box 8, and further achieving efficient mixing.

[0044] Please refer to Figure 7 , the present invention provides an energy-saving intelligent high-mixing control asphalt mixture preparation method, including the following steps: S1, the aggregate is first stored in the cold feed bin before the mixture, and then the conveyor belt sends the aggregate into the drying drum, where it is heated at a high temperature by the burner to remove moisture, and then is sent to the upper feed port above the vibrating housing of the screening system by the elevator, and the mixed aggregate to be screened enters from the topmost vibrating screen mesh; S2, the vibrating screen mesh is designed with different screen hole diameters adapted to the particle size of the screened aggregate, forming a multi-stage screen mesh, distinguishing the aggregate according to different particle sizes, and screening the aggregates with different particle sizes to the corresponding layer; S3, during the vibrating screening, for the aggregate with a variable jumping position on the vibrating screen mesh, the various types of screen holes at each place enable the aggregate to enter the corresponding type of screen hole at different positions, achieving efficient and high-precision screening; S4, during the vibrating screening, the cross-section of the screen hole of each layer of the vibrating screen mesh is designed to be larger at the top and smaller at the bottom. With the vibration, the aggregate is easily separated from the screen hole and thus is not easily blocked; S5, during the vibrating screening process, the flat section guides the aggregate to the inlet of the aggregate bin synchronously when the aggregate enters the screen mesh. The aggregate gradually accelerates downward and enters the rolling section. The rolling section makes the aggregate roll and fall multiple times. Different aggregates roll and jump in multiple directions and contact the screen mesh, and are fully and accurately screened; S6. After the aggregate tumbles and is screened, it enters the bouncing section. The design with small grooves on both the upper and lower sides of the contact screen enables the aggregate to form a reciprocating bounce while descending between the small grooves on the upper and lower screens multiple times while vibrating downward, further increasing the number of bounces and prolonging the contact time between the aggregate and the screen. Driven by the subsequent bone particles, after sufficient bouncing, it enters the aggregate bin; S7. The aggregate bin controls the opening degree or feeding of the screened aggregate through an intelligent control discharge gate according to a set weight ratio, and then the aggregate enters the rotating hopper. The rotating hopper performs a two-way centrifugal rotation motion. During the centrifugal motion, the aggregate will spread outwards, and when the rotation stops, it will converge and mix downward. After multiple reciprocating rotations, efficient mixing is achieved; during the process of the rotating hopper driving the aggregate to perform centrifugal motion, the aggregate tumbles and disperses under the action of the convex part. Similarly, when the aggregate descends and converges, it will also tumble and disperse and mix, further realizing the efficient mixing of aggregates with different particle sizes and completing the automatic high mixing of aggregates; S8. After the highly mixed aggregate collected below the rotating hopper is opened by an intelligent control valve, it enters the mixing box; S9. The mixing box drives two stirrers to rotate through external conventional drive, and further drives the stirring blades to rotate to stir and mix the aggregate evenly. During mixing, fillers and asphalt are added, and the fillers and asphalt are also added according to the ratio; S10. The stirring blades of the two stirrers are spirally distributed around the axis of the stirrer in multiple numbers. When rotating, while the mixture tumbles up and down and left and right, the stirrer drives the aggregate to move from front to back through the spirally distributed stirring blades, and on the other side, it moves from back to front, realizing the rotary cyclic stirring of the bone particles in the mixing box, further achieving efficient mixing. After mixing, discharging is completed from the lower outlet of the mixing box to carry out the next process.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving intelligent high-mix control asphalt mixture preparation device, characterized in that, It includes a multi-stage screening mechanism, a storage mechanism, and a mixing mechanism; The multi-stage screening mechanism includes multiple layers of vibrating screen meshes (1) and a vibrating housing (2). Sieve holes (101) are provided on each layer of the vibrating screen meshes (1). The aperture diameters of the sieve holes (101) of each layer of the vibrating screen meshes (1) are different, and the aperture diameter of the upper-layer sieve holes (101) is larger than that of the lower-layer sieve holes (101), forming a multi-stage screen mesh; Moreover, the sieve holes (101) of each layer of the vibrating screen meshes (1) include various shapes; An inlet (3) and a waste collection area (4) are provided above the vibrating housing (2); The storage mechanism includes multiple aggregate bins (5). The aggregate bins (5) are composed of multiple partitions (6) arranged in the vibrating housing (2). The upper part of the partition (6) overlaps with the corresponding vibrating screen mesh (1), and the lower end leads to the lower outlet of the vibrating housing (2) to form multiple discharge ports. The opening degree or the feeding speed is controlled by an intelligent control discharge door (7); The mixing mechanism includes a mixing box (8). A mixing inlet (801) is provided at the top of the mixing box (8). Two stirrers (802) are installed inside the mixing box (8), and stirring blades (8021) are installed on the stirrers (802); The mixing box (8) further includes a filler inlet (803) and an asphalt inlet (804).

2. The energy-saving intelligent high-mix control asphalt mixture preparation equipment according to claim 1, wherein, The cross-section of the sieve hole (101) of each layer of the vibrating screen mesh (1) is designed with a larger upper part and a smaller lower part. That is, each sieve hole (101) includes an upper hole edge (1011) and a lower hole edge (1012), and the diameter of the upper hole edge (1011) is larger than that of the lower hole edge (1012). At the same time, the aperture gradually transitions from the upper hole edge (1011) to the lower hole edge (1012).

3. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 2, characterized in that, The vibrating screen mesh (1) is a polyurethane screen mesh, and a support skeleton (102) is integrally connected to the lower part.

4. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 1, characterized in that, The overall cross-section of the vibrating screen mesh (1) is in an arc structure and gradually slopes downward from the feeding end to the other end. The vibrating screen mesh (1) includes a flat section (1031) at the feeding place and a tumbling section (1032) located below the flat section (1031). Multiple grooves are provided on the tumbling section (1032).

5. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 4, characterized in that The vibrating screen mesh (1) further includes a bouncing section (1033) located below the tumbling section (1032). Multiple groups of small grooves are provided on the surface of the bouncing section (1033).

6. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 5, characterized in that, For the bouncing section of the vibrating screen mesh (1), both the upper and lower surfaces are designed with small grooves.

7. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 1, characterized in that, A high-speed mixing mechanism is also provided between the storage mechanism and the mixing mechanism. The high-speed mixing mechanism includes a rotating hopper (9). The rotating hopper (9) is located below the vibrating housing (2). An intelligent control valve (901) is provided at the lower outlet of the rotating hopper (9), and a drive for driving the rotating hopper (9) to rotate is configured outside.

8. An energy-saving intelligent high-mix control asphalt mixture preparation device according to claim 7, characterized in that, Multiple protruding parts (902) are provided on the inner wall of the rotating hopper (9). The protruding parts (902) are evenly spaced, and the spacing distance of the protruding parts (902) is larger than the maximum particle size of the aggregate.

9. The energy-saving intelligent high-mix control asphalt mixture preparation equipment according to claim 1, characterized in that, The stirring blades (8021) of the two stirrers (802) are all spirally distributed around the axis of the stirrer (802) in multiple numbers. The two stirrers (802) rotate in different directions, and the stirring blades (8021) are arranged in a staggered manner.

10. A preparation method of an energy-saving intelligent high-mix control asphalt mixture preparation device according to any one of claims 1-9, characterized in that, It includes the following steps: S1, feeding the mixed aggregate to be screened into the topmost layer of the vibrating screen mesh; S2. The multi-stage vibrating screen separates the aggregates according to different particle sizes and screens the aggregates with different particle sizes onto the corresponding layers. S3. During vibrating screening, the sieve holes of various types at various locations enable the aggregates to enter the corresponding types of sieve holes at different positions, achieving efficient and high-precision screening. S4. During vibrating screening, the cross-section of the sieve holes of each layer of the vibrating screen is designed with a larger upper part and a smaller lower part. Combined with vibration, the aggregates are easily separated from the sieve holes and thus are not easily blocked. S5. During the vibrating screening process, the tumbling section causes the aggregates to tumble and fall multiple times. Different aggregates tumble and jump in multiple directions to contact the screen and are fully and accurately screened. S6. After the aggregates are tumbling-screened, they enter the bouncing section. While vibrating and descending, the aggregates form a reciprocating bounce while descending between the small grooves of the upper and lower screens multiple times, further increasing the number of bounces and prolonging the contact time between the aggregates and the screen. Driven by the subsequent bone particles, after sufficient bouncing, they enter the aggregate bin. S7. The aggregate bin controls the opening degree or feeding of the screened aggregates into the rotary hopper according to the set weight ratio through an intelligent control discharge gate. During the process of the rotary hopper driving the aggregates to move centrifugally, the aggregates tumble and disperse under the action of the convex parts. Similarly, when the aggregates descend and converge, they also tumble and disperse and mix, further realizing the efficient mixing of aggregates with different particle sizes and completing the automatic high mixing of aggregates. S8. The highly mixed aggregates collected under the rotary hopper enter the mixing box after the intelligent control valve is opened. S9. The mixing box drives two agitators to rotate through external conventional drive, and further drives the mixing blades to rotate to stir and mix the aggregates evenly. Fillers and asphalt are added accordingly according to the ratio during mixing. S10. The agitator drives the aggregates to move from front to back through the helically distributed mixing blades, while on the other side, they move from back to front, realizing the rotary circular stirring of the bone particles in the mixing box, further achieving efficient mixing. After mixing, the materials are discharged from the lower outlet of the mixing box to carry out the next process.

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