Mixing and stirring equipment for asphalt

Abstract

The utility model provides mixing and stirring equipment for asphalt, which comprises an asphalt stirrer for stirring an asphalt mixture and a screw conveyer positioned beside the asphalt stirrer and used for conveying the asphalt mixture, a conveying pipe of the screw conveyer is communicated with an inner cavity of the asphalt stirrer, and a plurality of suction holes are formed in the screw conveyer. According to the asphalt mixing and stirring equipment, by arranging the recycling assembly, the possibility that dust affects the processing quality of a mixture is reduced, the sucked dust particles can be screened, the dust particles can be recycled, and the mixing and stirring equipment has the advantages that the mixing and stirring efficiency is improved, and the service life of the mixing and stirring equipment is prolonged. According to the invention, stone components which can be recycled are recovered, fine aggregate components in grading design are ensured to be unchanged, and a plurality of suction holes are formed along the moving direction of the asphalt mixture, so that the dust suction efficiency is improved, and the quality of a mixture finished product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixing and stirring equipment, and particularly relates to an asphalt mixing and stirring equipment. Background Art

[0002] The main process characteristics of asphalt mixture mixing equipment are that various components are metered batch by batch and are put into a stirrer in a preset order for forced stirring. After discharging the well-stirred finished material, the next cycle is carried out, forming a cyclic operation process that goes round and round. The asphalt mixture mixing equipment is usually used with a screw conveyor.

[0003] Since some asphalt mixtures have a large dust content, and the screw conveyor directly conveys these asphalt mixtures into the stirrer. During the mixing process, dust particles are agglomerated with asphalt and are not easy to disperse, and the coating with crushed stones is uneven, thus affecting the quality of the asphalt mixture, making the main detection indexes such as the flatness, density, and water permeability of the finished asphalt pavement unqualified, and seriously affecting the quality of the asphalt pavement. Therefore, a fan is usually used to filter out the dust particles generated during the conveying process.

[0004] A kind of asphalt mixture production equipment for warm mixing, hot mixing, and cold mixing disclosed in a Chinese patent with the reference publication number of CN220486192U. In this application, by setting a dust removal mechanism, during the process of the screw conveyor conveying the asphalt mixture, the exhaust fan can discharge the dust mixed in the asphalt mixture into the water inside the water tank through the ash guide port, ash guide hopper, and ash guide pipe, so that the dust is dissolved in the water. This can not only effectively reduce the dust content of the asphalt mixture, make the asphalt mixture mix more evenly inside the temperature-adjustable stirrer, and then improve the quality of the finished asphalt, but also dissolve the dust in the water, which can reduce the probability of dust polluting the external environment, and thus play an environmental protection effect.

[0005] However, a large amount of fine aggregate part in the dust particles filtered out in this application, that is, the stone components with a particle size of 4.75mm - 0.075mm, which is an important part of the mixture. Discarding this part will damage the designed mineral aggregate gradation and affect the finished product quality. Summary of the Invention

[0006] In order to overcome the deficiencies of the prior art, the utility model proposes an asphalt mixing and stirring device, comprising an asphalt mixer for stirring asphalt mixture and a screw conveyor located beside the asphalt mixer for conveying the asphalt mixture, the feed pipe of the screw conveyor being connected to the inner cavity of the asphalt mixer, the screw conveyor being provided with a plurality of suction holes, a primary filter screen covering the suction holes being fixed on the outer wall of the screw conveyor, a connecting block being provided outside the plurality of suction holes on the outer shell of the screw conveyor, a discharge hole being located outside the suction hole and connected to the suction hole on the side of the connecting block facing the screw conveyor, a plurality of discharge branch pipes corresponding to the discharge holes one by one and connected to each other on the side of the connecting block facing away from the screw conveyor, a plurality of discharge branch pipes being provided at one end of the plurality of discharge branch pipes away from the connecting block and connected to the discharge branch pipes, one end of the discharge main pipe being closed, and the other end being connected to the air inlet pipe of a fan, and the air outlet pipe of the fan being connected to a recovery component.

[0007] To achieve the above purpose, the asphalt mixture enters the bottom of the inner cavity of the screw conveyor, and is powered by the screw conveyor to push the asphalt mixture to realize the conveying of the screw conveyor. The asphalt mixture moves toward the direction of the feed pipe and enters the inner cavity of the asphalt mixer through the feed pipe. The asphalt mixer provides power to stir the asphalt mixture, and the stirred mixture is discharged from the discharge pipe of the asphalt mixer. The fan provides power. During the movement of the asphalt mixture in the inner cavity of the screw conveyor, dust particles enter the discharge hole through the suction hole, and then enter the discharge branch pipe, the discharge main pipe, the air inlet pipe and the air outlet pipe in turn, and are then collected and recycled by the recovery component. By setting up the recovery component, not only the possibility of dust affecting the processing quality of the mixture is reduced, but also the sucked dust particles can be screened to recover the reusable stone components, thereby ensuring that the fine aggregate components in the grading design remain unchanged, and multiple suction holes are set along the moving direction of the asphalt mixture to improve the dust suction efficiency and improve the quality of the finished mixture.

[0008] Furthermore, the recycling component includes collection boxes stacked in sequence in the vertical direction, the collection box at the bottom has a hollow inner cavity and an open top, the remaining collection boxes have hollow inner cavities and are open at both ends, and recovery screens covering the bottom opening parts are fixed on the remaining collection boxes, the apertures of several of the recovery screens gradually decrease from top to bottom, several of the collection boxes are threadedly connected, the collection box at the topmost end is nested with a sealing cover that closes the top opening part, the sealing cover is provided with a pipe joint connected to the inner cavity of the collection box, and the pipe joint is detachably fixedly connected to the air outlet pipe of the fan.

[0009] Through the above technical solution, the air outlet pipe, the pipe joint, and several collection boxes are interconnected, and the power is provided by the fan. The dust in the screw conveyor enters the collection box through the air outlet pipe, and is screened by multiple recovery screens to facilitate recovery.

[0010] Furthermore, a number of the collecting boxes are provided with control components for increasing the screening rate.

[0011] Through the above technical solution, by setting a control component, the dust particles entering the collection box are stirred, the screening rate is increased, and the recovery of dust particles is convenient.

[0012] Furthermore, the control component includes a circular hole opened in the middle position of the bottom collection box, and a guide tube located outside the circular hole is arranged in the middle position of each collection box. The guide tube located at the bottom is fixedly connected to the collection box, and the remaining guide tubes are fixedly connected to adjacent collection boxes through a number of evenly arranged support rods. The recovery screen is sleeved outside the guide tube, and the height of the guide tube is less than the height of the inner cavity of the collection box. A long shaft adapted to the guide tube is passed through the outside of several guide tubes, and an annular support sleeved outside the long shaft and threadedly connected to the long shaft is arranged in the middle position inside each collection box. A driving rod is fixed in an array on the circumferential outer wall of the annular support, and a driving blade close to the recovery screen and adapted to the inner cavity of the collection box is fixed on the driving rod. A control component for driving the long shaft to rotate to drive the driving rod and the driving blade to rotate is arranged outside several collection boxes.

[0013] Through the above technical solution, power is provided by the control component to drive the long shaft to rotate. The rotation of the long shaft will drive the annular support fixed to the long shaft thread and the driving rod and driving blades of the integrated structure with the annular support to rotate. The driving rod and driving blades rotate in the inner cavity of each collecting box to stir the dust particles and increase the screening rate of the dust particles, thereby improving the recovery efficiency. The long shaft, the annular support and the collecting box are detachably fixedly connected, which is convenient for disassembly and assembly.

[0014] Furthermore, the control component includes a screening motor arranged beside the long shaft, the output shaft end of the screening motor is coaxially fixed with an A synchronous wheel, the bottom end of the long shaft is coaxially fixed with a B synchronous wheel, and the outer sleeves of the A synchronous wheel and the B synchronous wheel are provided with synchronous belts adapted to the A synchronous wheel and the B synchronous wheel.

[0015] Through the above technical solution, the screening motor provides power to drive the A synchronous wheel to rotate, and the power is transmitted through the A synchronous wheel, the B synchronous wheel and the synchronous belt, thereby driving the long shaft coaxially fixed with the B synchronous wheel to rotate.

[0016] Furthermore, a recycling box with a hollow inner cavity and an open one side is provided below the screw conveyor, the fan is fixed on the recycling box, the air outlet pipe of the fan passes through the inner cavity of the recycling box, a partition is fixed to the inner cavity of the recycling box, the collection box located at the bottom is placed on the partition and fixed to the partition by screws, the long axis passes through the partition and is rotatably connected to the partition, the screening motor is fixed on the upper surface of the partition, and a sealing door is hingedly connected to the recycling box to close the opening part on one side of the recycling box.

[0017] Through the above technical solutions, the collection box is convenient to take by setting a sealing door, and the screening motor and several collection boxes are supported by a partition board.

[0018] Furthermore, an installation plate with an arc-shaped cross-section and adapted to the connecting block is provided outside the conveying pipe. Both the installation plate and the connecting block are completely attached to the circumferential outer wall of the conveying pipe. Both ends of the installation plate and the connecting block bend and extend outwards, and the outwardly bent and extended parts of the installation plate and the connecting block are fixedly connected by a plurality of bolts.

[0019] Through the above technical solutions, in order to reduce the possibility of dust particles overflowing inside and outside through the gap between the suction hole and the connecting block, and at the same time to improve the connection stability between the connecting block and the screw conveyor, the installation plate and the connecting block are set to clamp the screw conveyor, which is convenient for disassembling and assembling the connecting block to clean the connecting block.

[0020] In summary, the beneficial effects of the mixing and stirring equipment for asphalt are as follows: The asphalt mixture enters the bottom of the inner cavity of the screw conveyor. Through the power provided by the screw conveyor, the asphalt mixture is pushed to realize the transportation of the screw conveyor. The asphalt mixture moves towards the direction of the feeding pipe and enters the inner cavity of the asphalt mixer through the feeding pipe. Through the power provided by the asphalt mixer, the asphalt mixture is stirred. The stirred mixture is discharged from the discharge pipe of the asphalt mixer. Through the power provided by the fan, during the movement of the asphalt mixture in the inner cavity of the screw conveyor, the dust particles enter the discharge hole through the suction hole, and then enter the discharge branch pipe, the discharge main pipe, the air inlet pipe and the air outlet pipe in sequence, and then are collected and recycled by the recycling component. By setting the recycling component, not only the possibility of dust affecting the processing quality of the mixture is reduced, but also the screened dust particles can be screened, and the reusable stone components can be recycled to ensure that the fine aggregate components in the grading design remain unchanged. And setting a plurality of suction holes along the moving direction of the asphalt mixture improves the dust suction efficiency and the quality of the finished mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following further describes and elaborates the present invention with reference to the drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the preferred embodiment of the present invention;

[0023] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the connecting block of the present invention;

[0024] Figure 3 It is a schematic diagram of the structure for embodying the discharge hole of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the partition board connected to the screening motor of the present invention;

[0026] Figure 5 This is a schematic diagram of the explosion structure of the recycling component of the present utility model.

[0027] Reference numerals: 1, asphalt mixer; 101, housing; 102, mixing motor; 103, discharge pipe; 2, screw conveyor; 201, conveying pipe; 202, transmission shaft; 203, screw blade; 204, conveying motor; 205, feed hopper; 206, material conveying pipe; 3, suction hole; 4, primary filter screen; 5, connecting block; 6, discharge hole; 7, discharge branch pipe; 8, discharge main pipe; 9, fan; 10, air inlet pipe; 11, air outlet pipe; 12, recycling component; 1201, collection box; 1202, recycling screen; 1203, sealing cover; 1204, pipe joint; 13, control component; 1301, circular hole; 1302, guiding pipe; 1303, long shaft; 1304, annular support; 1305, driving rod; 1306, driving blade; 1307, dead stop; 14, screening motor; 15, A synchronous pulley; 16, B synchronous pulley; 17, synchronous belt; 18, recycling box; 19, partition; 20, sealing door; 21, mounting plate; 22, bolt. Detailed implementation manners

[0028] Next, the technical solutions of the present utility model will be described more clearly and completely by combining with the accompanying drawings and through the description of the preferred implementation manners of the present utility model.

[0029] As Figures 1-5 shown, a kind of asphalt mixing and stirring equipment in the preferred implementation manner of the present utility model includes an asphalt mixer 1 for stirring asphalt mixture and a screw conveyor 2 located beside the asphalt mixer 1 for conveying asphalt mixture.

[0030] As Figure 1 , the asphalt mixer 1 includes a housing 101 with a hollow inner cavity. A stirring rod is rotatably connected to the inner cavity of the housing 101. A plurality of stirring blades adapted to the inner cavity of the housing 101 are fixed on the circumferential outer wall of the stirring rod. A mixing motor 102 for driving the rotation of the stirring rod is fixed on one side of the outer wall of the housing 101. On the other side, there is a discharge pipe 103 communicating with the inner cavity of the housing 101 and used for discharging materials. A feeding port for putting materials is also provided on the upper surface of the asphalt mixer 1. The asphalt mixer 1 is an existing device, so no more details will be described here.

[0031] As Figure 1 and Figure 2The screw conveyor 2 includes a conveying pipe 201 with a hollow inner cavity, a transmission shaft 202 is rotatably connected to the middle position of the inner cavity of the conveying pipe 201, and a spiral blade 203 adapted to the conveying pipe 201 and used for conveying asphalt mixture is integrated on the circumferential outer wall of the transmission shaft 202. A conveying motor 204 for driving the transmission shaft 202 to rotate is fixed to the end of the conveying pipe 201. A feed hopper 205 and a conveying pipe 206 for feeding and conveying are respectively provided on the outer side wall of the conveying pipe 201. The feed hopper 205 and the conveying pipe 206 are both connected to the inner cavity of the conveying pipe 201, and the end of the conveying pipe 206 away from the conveying pipe 201 is connected to the inner cavity of the casing 101. The screw conveyor 2 is an existing equipment, so it will not be described in detail here.

[0032] like Figure 1 and Figure 2 The asphalt mixture enters the bottom of the inner cavity of the conveying pipe 201 through the feed hopper 205 located at the bottom end, and is powered by the conveying motor 204 to drive the integrated transmission shaft 202 and the spiral blades 203 to rotate. The rotating spiral blades 203 push the asphalt mixture to realize the conveying of the screw conveyor 2. The asphalt mixture moves toward the conveying pipe 206 under the action of the spiral blades 203 and is discharged through the conveying pipe 206. The asphalt mixture discharged through the conveying pipe 206 enters the inner cavity of the casing 101, and is powered by the stirring motor 102 to drive the stirring rod and the stirring blades of the integrated structure to rotate to stir the asphalt mixture. The stirred mixture is discharged from the discharge pipe 103. The above is the prior art, so it will not be described in detail here.

[0033] like Figure 2 and Figure 3 Asphalt mixture will generate dust particles during its movement in the delivery pipe 201. In order to reduce the possibility of dust particles affecting the quality of the mixture, a plurality of suction holes 3 are evenly opened on the circumferential outer wall of the delivery pipe 201. A primary filter 4 covering the suction holes 3 is fixed on the delivery pipe 201 to reduce the possibility of non-dust particles passing through the suction holes 3 and out of the delivery pipe 201. The delivery pipe 201 is provided with a connecting block 5 outside the plurality of suction holes 3. The connecting block 5 is connected to the outer wall of the delivery pipe 201. The wall is completely fitted, and a discharge hole 6 located outside the suction hole 3 and connected to the suction hole 3 is opened on the side of the connecting block 5 facing the screw conveyor 2. A plurality of discharge branch pipes 7 corresponding to the discharge holes 6 and connected to each other are arranged on the side of the connecting block 5 away from the screw conveyor 2. A discharge main pipe 8 connected to the discharge branch pipes 7 is arranged at one end of the plurality of discharge branch pipes 7 away from the connecting block 5. One end of the discharge main pipe 8 is closed, and the other end is connected to the air inlet pipe 10 of the fan 9. The air outlet pipe 11 of the fan 9 is connected to the recovery component 12.

[0034] like Figure 2 and Figure 3, during the movement of the asphalt mixture in the inner cavity of the screw conveyor 2, dust particles enter the discharge hole 6 through the suction holes 3, and then enter the discharge branch pipe 7, the discharge main pipe 8, the air inlet pipe 10 and the air outlet pipe 11 in sequence. After that, they are collected and recycled by the recycling component 12. By setting the recycling component 12, not only the possibility of dust affecting the processing quality of the mixture is reduced, but also the suctioned dust particles can be screened to recycle the reusable stone components, ensuring that the fine aggregate components in the gradation design remain unchanged. Moreover, setting multiple suction holes 3 along the moving direction of the asphalt mixture improves the dust suction efficiency and the quality of the finished mixture.

[0035] As Figure 4 and Figure 5 , the recycling component 12 includes collection boxes 1201 stacked in sequence in the vertical direction. The height dimensions of several collection boxes 1201 can be selected according to the number of dust particles. The inner cavity of the collection box 1201 at the bottommost is hollow and open at the top. The inner cavities of the remaining collection boxes 1201 are hollow and open at both the upper and lower ends. And a recycling screen 1202 covering the bottom opening part is fixed on the remaining collection boxes 1201. The pore diameters of several recycling screens 1202 gradually decrease from top to bottom. Several collection boxes 1201 are connected by screw threads. A sealing cover 1203 covering the top opening part is nested on the collection box 1201 at the topmost. A pipe joint 1204 communicating with the inner cavity of the collection box 1201 is provided on the sealing cover 1203. The pipe joint 1204 is detachably and fixedly connected to the air outlet pipe 11 of the fan 9. The air outlet pipe 11 of the fan 9 is a flexible pipe, which is convenient for disassembly and assembly.

[0036] As Figure 4 and Figure 5 , the air outlet pipe 11, the pipe joint 1204 and several collection boxes 1201 are interconnected. Powered by the fan 9, the dust in the screw conveyor 2 enters the collection box 1201 through the air outlet pipe 11. Through the cooperation of several recycling screens 1202, dust particles of different particle sizes are screened for easy recycling.

[0037] As Figure 4 and Figure 5In order to improve the screening efficiency, a plurality of collecting boxes 1201 are provided with a control assembly 13 for improving the screening rate. The control assembly 13 includes a circular hole 1301 opened in the middle of the bottom collecting box 1201. A guide tube 1302 located outside the circular hole is provided in the middle of each collecting box 1201. The inner cavity of the guide tube 1302 is hollow and has openings at both ends. The guide tube 1302 located at the bottom is fixedly connected to the collecting box 1201, and the remaining guide tubes 1302 are connected to adjacent collecting boxes. 1201 is fixedly connected by a number of evenly arranged support rods, the recovery screen 1202 is sleeved outside the guide tube 1302 and the support rod and is fixedly connected to the guide tube 1302 and the support rod, the center lines of the collecting box 1201, the circular hole 1301, the guide tube 1302 and the recovery screen 1202 coincide, the height of the guide tube 1302 is smaller than the height of the inner cavity of the collecting box 1201, and a long shaft 1303 adapted to the guide tube 1302 and rotatably connected to the guide tube 1302 is passed through the outside of the guide tubes 1302.

[0038] like Figure 4 and Figure 5 , an annular support 1304 is provided in the middle position inside each collecting box 1201, which is sleeved outside the long axis 1303 and threadedly connected to the long axis 1303; a driving rod 1305 is fixed in an array on the circumferential outer wall of the annular support 1304; a driving blade 1306 close to the recovery screen 1202 and adapted to the inner cavity of the collecting box 1201 is fixed on the driving rod 1305; a control component 13 is provided outside several collecting boxes 1201 for driving the long axis 1303 to rotate so as to drive the driving rod 1305 and the driving blade 1306 to rotate; a dead stop 1307 whose size is larger than the annular support 1304 and the guide tube 1302 is threadedly connected at the top of the long axis 1303, thereby reducing the possibility of the annular support 1304 located at the top coming off the long axis 1303 during rotation.

[0039] like Figure 4 and Figure 5 The control component 13 provides power to drive the long shaft 1303 to rotate. The rotation of the long shaft 1303 will drive the annular support 1304 threadedly fixed to the long shaft 1303 and the driving rod 1305 and the driving blade 1306 of the integrated structure with the annular support 1304 to rotate. The driving rod 1305 and the driving blade 1306 rotate in the inner cavity of each collecting box 1201 to stir the dust particles and increase the screening rate of the dust particles, thereby improving the recovery efficiency. The long shaft 1303, the annular support 1304 and the collecting box 1201 are detachably fixedly connected, which is convenient for disassembly and assembly.

[0040] like Figure 5, an annular chute is provided on the guide pipe 1302, and an annular slider adapted to the annular chute is integrally formed on one side of the annular support 1304 facing the guide pipe 1302. When the annular support 1304 abuts against the end of the guide pipe 1302, the annular slider extends into the annular chute, playing a guiding and limiting role in the rotation of the annular support 1304.

[0041] As Figure 4 and Figure 5 , the control assembly 13 includes a screening motor 14 arranged beside the long shaft 1303. An A synchronous pulley 15 is coaxially fixed to the output shaft end of the screening motor 14, and a B synchronous pulley 16 is coaxially fixed to the bottom end of the long shaft 1303. A synchronous belt 17 adapted to the A synchronous pulley 15 and the B synchronous pulley 16 is sleeved outside the A synchronous pulley 15 and the B synchronous pulley 16. Power is provided by the screening motor 14 to drive the A synchronous pulley 15 to rotate, and power is transmitted through the A synchronous pulley 15, the B synchronous pulley 16 and the synchronous belt 17, thereby driving the long shaft 1303 coaxially fixed to the B synchronous pulley 16 to rotate.

[0042] As Figure 1 and Figure 4 , a recovery box 18 with a hollow inner cavity and an opening on one side is provided below the screw conveyor 2. A fan 9 is fixed on the recovery box 18, and the air outlet pipe 11 of the fan 9 penetrates into the inner cavity of the recovery box 18. A partition 19 is fixed in the inner cavity of the recovery box 18. The lowermost collection box 1201 is placed on the partition 19 and fixed to the partition 19 by screws. The long shaft 1303 penetrates the partition 19 and is rotatably connected to the partition 19. The screening motor 14 is fixed on the upper surface of the partition 19. A sealing door 20 for closing the opening part on one side of the recovery box 18 is hinged to the recovery box 18. By setting the sealing door 20, it is convenient to take the collection box 1201, and the screening motor 14 and several collection boxes 1201 are supported by the partition 19.

[0043] As Figure 1 and Figure 2 and Figure 3 , in order to reduce the possibility of dust particles overflowing inside and outside the gap between the suction hole 3 and the connecting block 5, and at the same time to improve the connection stability between the connecting block 5 and the screw conveyor 2, an installation plate 21 with a cross-section in the shape of an arc and adapted to the connecting block 5 is further provided outside the conveying pipe 201. Both the installation plate 21 and the connecting block 5 are completely attached to the circumferential outer wall of the conveying pipe 201. Both ends of the installation plate 21 and the connecting block 5 bend and extend outward. The outwardly bent and extended parts of the installation plate 21 and the connecting block 5 are fixedly connected by a plurality of bolts 22, which is convenient for disassembling and assembling the connecting block 5 to clean the connecting block 5. Rubber sealing rings are fixed on one side of the installation plate 21 and the connecting block 5 facing the conveying pipe 201.

[0044] During use, turn on the fan 9, the screening motor 14, the stirring motor 102 and the conveying motor 204. The asphalt mixture enters the bottom of the inner cavity of the conveying pipe 201 through the feed hopper 205 located at the bottom. Driven by the power provided by the conveying motor 204, the integrated drive shaft 202 and the spiral blade 203 rotate. The rotating spiral blade 203 pushes the asphalt mixture to achieve the conveying by the screw conveyor 2. Under the action of the spiral blade 203, the asphalt mixture moves towards the direction of the material conveying pipe 206. During the conveying of the asphalt mixture, the dust particles generated are under the action of the fan 9 and enter the discharge hole 6 through the suction hole 3, and then enter the discharge branch pipe 7, the discharge main pipe 8, the air inlet pipe 10 and the air outlet pipe 11 in sequence, and then enter the collection box 1201;

[0045] Driven by the power provided by the screening motor 14, the A synchronous pulley 15 fixed coaxially with the output shaft of the screening motor 14 rotates. Through the power transmission of the A synchronous pulley 15, the B synchronous pulley 16 and the synchronous belt 17, the long shaft 1303 fixed coaxially with the B synchronous pulley 16 rotates. The long shaft 1303 is rotationally connected to the partition plate 19. The rotation of the long shaft 1303 drives the annular support 1304 fixed to the long shaft 1303, the driving rod 1305 fixed to the annular support 1304 and the driving blade 1306 to rotate. The driving blade 1306 and the driving rod 1305 rotate in the inner cavity of each collection box 1201 to stir the dust particles in the collection box 1201. The recovery screen 1202 with different pore sizes from top to bottom screens the dust particles into dust particles larger than 4.75mm, dust particles between 4.75mm and 0.075mm, and dust particles smaller than 0.075mm. The dust particles of different particle sizes are collected by the corresponding collection box 1201;

[0046] After the screening is completed, the operator disconnects the pipe joint 1204 from the air outlet pipe 11 of the fan 9, removes the sealing cover 1203, rotates and removes the annular support 1304, and then takes out the collection box 1201 at the top. Repeat the above operations until all the collection boxes 1201 are removed from the long shaft 1303, and remove the screw connecting the collection box 1201 at the bottommost end to the partition plate 19. Throw away the dust particles with a particle size smaller than 0.075mm, as the dust particles with a particle size smaller than 0.075mm will damage the gradation. Take out the dust particles with a particle size larger than 0.075mm and recycle the clean dust particles with a particle size larger than 0.075mm, which not only ensures the mineral aggregate gradation but also prevents the heated fine aggregate from flowing away.

[0047] The above specific embodiments only describe the preferred embodiments of the present invention, rather than limiting the protection scope of the present invention. Without departing from the design concept and spirit scope of the present invention, various deformations, substitutions and improvements made by those of ordinary skill in the art to the technical solutions of the present invention according to the written description and drawings provided by the present invention shall fall within the protection scope of the present invention. The protection scope of the present invention is determined by the claims.

Claims

1. A mixing and stirring equipment for asphalt, characterized in that: It comprises an asphalt mixer (1) for mixing asphalt mixture and a screw conveyor (2) located beside the asphalt mixer (1) for conveying the asphalt mixture, wherein the conveying pipe (206) of the screw conveyor (2) is connected to the inner cavity of the asphalt mixer (1); The screw conveyor (2) is provided with a plurality of suction holes (3), and a primary filter (4) covering the suction holes (3) is fixed on the outer wall of the screw conveyor (2). The outer shell of the screw conveyor (2) is provided with a connecting block (5) located outside the plurality of suction holes (3). The connecting block (5) is provided with a discharge hole (6) located outside the suction hole (3) and connected to the suction hole (3) on the side facing the screw conveyor (2). The connecting block (5) is provided with a plurality of discharge branch pipes (7) corresponding to the discharge holes (6) one by one and connected to each other on the side facing away from the screw conveyor (2). The plurality of discharge branch pipes (7) are provided with a discharge main pipe (8) connected to the discharge branch pipes (7) at one end away from the connecting block (5). The discharge main pipe (8) is closed at one end and connected to an air inlet pipe (10) of a fan (9) at the other end. The air outlet pipe (11) of the fan (9) is connected to a recovery component (12).

2. The asphalt mixing equipment according to claim 1, characterized in that: The recovery component (12) comprises collection boxes (1201) stacked in sequence in a vertical direction, the collection box (1201) at the bottom end has a hollow inner cavity and an open top, the other collection boxes (1201) have hollow inner cavities and are open at both ends, and the other collection boxes (1201) are fixed with recovery screens (1202) covering the bottom openings, the apertures of several recovery screens (1202) gradually decrease from top to bottom, several collection boxes (1201) are threadedly connected, the collection box (1201) at the top end is nested with a sealing cover (1203) that closes the top opening, the sealing cover (1203) is provided with a pipe joint (1204) that is connected to the inner cavity of the collection box (1201), and the pipe joint (1204) is detachably fixedly connected to the air outlet pipe (11) of the fan (9).

3. The asphalt mixing equipment according to claim 2, characterized in that: A plurality of the collecting boxes (1201) are provided with a control component (13) for increasing the screening rate.

4. The asphalt mixing equipment according to claim 3, characterized in that: The control component (13) comprises a circular hole (1301) opened in the middle of the collection box (1201) at the bottom, a guide tube (1302) located outside the circular hole (1301) is arranged in the middle of each collection box (1201), the guide tube (1302) located at the bottom is fixedly connected to the collection box (1201), and the remaining guide tubes (1302) are fixedly connected to adjacent collection boxes (1201) through a plurality of evenly arranged support rods, the recovery screen (1202) is sleeved outside the guide tube (1302), the height of the guide tube (1302) is less than the height of the inner cavity of the collection box (1201), and a long shaft (1303) adapted to the guide tube (1302) is passed through the outside of the plurality of guide tubes (1302); An annular support (1304) is provided at the middle position inside each of the collecting boxes (1201), which is sleeved outside the long axis (1303) and threadedly connected to the long axis (1303); a driving rod (1305) is fixed in an array on the circumferential outer wall of the annular support (1304); a driving blade (1306) close to the recovery screen (1202) and adapted to the inner cavity of the collecting box (1201) is fixed on the driving rod (1305); and a control component (13) is provided outside a plurality of the collecting boxes (1201) for driving the long axis (1303) to rotate so as to drive the driving rod (1305) and the driving blade (1306) to rotate.

5. The asphalt mixing equipment according to claim 4, characterized in that: The control component (13) comprises a screening motor (14) arranged beside the long shaft (1303), an A synchronous wheel (15) is coaxially fixed to the output shaft end of the screening motor (14), a B synchronous wheel (16) is coaxially fixed to the bottom end of the long shaft (1303), and the A synchronous wheel (15) and the B synchronous wheel (16) are provided with a synchronous belt (17) adapted to the A synchronous wheel (15) and the B synchronous wheel (16) on their outer sleeves.

6. The asphalt mixing equipment according to claim 5, characterized in that: A recovery box (18) with a hollow inner cavity and an opening on one side is provided below the screw conveyor (2); the fan (9) is fixed on the recovery box (18); the air outlet pipe (11) of the fan (9) penetrates into the inner cavity of the recovery box (18); a partition (19) is fixed to the inner cavity of the recovery box (18); the collection box (1201) located at the bottom is placed on the partition (19) and fixed to the partition (19) by screws; the long axis (1303) penetrates the partition (19) and is rotatably connected to the partition (19); the screening motor (14) is fixed on the upper surface of the partition (19); and a sealing door (20) is hingedly connected to the recovery box (18) for closing the opening portion on one side of the recovery box (18).

7. The asphalt mixing equipment according to claim 1, characterized in that: The screw conveyor (2) is also provided with a mounting plate (21) which is adapted to the connecting block (5) and has an arc-shaped cross section. The mounting plate (21) and the connecting block (5) are completely fitted with the circumferential outer wall of the conveying pipe (201). Both ends of the mounting plate (21) and the connecting block (5) are bent and extended outwards. The outward bent and extended parts of the mounting plate (21) and the connecting block (5) are fixedly connected by a plurality of bolts (22).

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