RAP fine aggregate liquefaction mixing device

Abstract

The application discloses a RAP fine aggregate liquefaction mixing device and belongs to the technical field of mixing. The device comprises a casing, a top cover fixedly installed on the top of the casing, a feeding pipe and a driving motor fixedly installed on the top of the top cover, a pressure-bearing spring shaft, an air cylinder and a material scattering and cleaning mechanism fixedly installed on the bottom surface inner wall of the casing. In the application, the material scattering and cleaning mechanism is arranged in the casing. Through the design, the gravity change of raw materials during the feeding process can drive the added RAP fine aggregate to be effectively and widely scattered, so that the distribution uniformity of the RAP fine aggregate in the main raw materials is improved, the mixing effect is effectively improved, and the problem that some mixed materials are prone to caking, the intermolecular attraction increases after entering the liquid, the fine mixed materials are prone to caking and are not easy to decompose, and the mixing effect is affected is solved. Meanwhile, the cleaning of the inner wall of the feeding pipe can be simultaneously completed, the waste of fine materials is avoided, and the equipment use effect is improved.

Description

Technical Field

[0001] This invention belongs to the field of mixing technology, and particularly relates to a RAP fine aggregate liquefaction mixing device. Background Technology

[0002] Mixing technology is the technique of mixing two or more different substances. It is used in many chemical production processes to obtain stable mixtures. In the production and processing of liquid asphalt, a certain amount of RAP fine aggregate needs to be mixed into the liquid asphalt, which also requires the use of mixing equipment.

[0003] In current mixing devices, when fine aggregates are added, these aggregates tend to fall into a specific area within the mixture. However, some aggregates, due to their tendency to clump, experience increased intermolecular attraction after being added to the liquid, causing them to clump together and become difficult to decompose, thus affecting the mixing effect. Furthermore, fine aggregates are prone to sticking to the walls during the feeding process, resulting in material waste and poor performance. To address these issues, a new RAP fine aggregate liquefaction mixing device is urgently needed. Summary of the Invention

[0004] The purpose of this invention is to address the problems in current mixing devices where fine aggregates tend to concentrate in a specific area of ​​the mixture, and where some aggregates, due to their tendency to clump, experience increased intermolecular attraction after being added to the liquid, leading to clumping and difficulty in subsequent decomposition, thus affecting the mixing effect. Furthermore, fine aggregates are prone to sticking to the walls during the feeding process, resulting in material waste and poor performance. Therefore, this invention proposes a RAP fine aggregate liquefaction mixing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a RAP fine aggregate liquefaction and mixing device, comprising a housing, a top cover fixedly installed on the top of the housing, a feeding pipe and a drive motor fixedly installed on the top of the top cover, a pressure spring shaft, an air cylinder and a material spreading and cleaning mechanism fixedly installed on the inner wall of the bottom surface of the housing, the material spreading and cleaning mechanism being used for the extensive spreading of RAP fine aggregate, a mixing inner cylinder fixedly installed at the top of the pressure spring shaft, a heating tube fixedly installed inside the shell cavity of the mixing inner cylinder, a mixing mechanism being provided at one end of the output shaft of the drive motor, the mixing mechanism being used for the effective mixing of raw materials, a grinding sleeve fixedly installed on the outside of the mixing mechanism, and a baffle plate fixedly installed on the outer surface of the mixing inner cylinder.

[0006] As a further description of the above technical solution:

[0007] The material spreading and cleaning mechanism includes a sleeve, a piston is slidably installed inside the sleeve, a lifting rod is longitudinally fixedly installed on the top surface of the piston, an air outlet is provided on one side of the outer wall of the air cylinder, and an air guide pipe is fixedly installed inside the air outlet.

[0008] As a further description of the above technical solution:

[0009] One end of the air guide pipe is sealed to an air hole provided on the side wall of the rod sleeve. The top of the lifting rod is provided with a rotating hole, and a material spreading component is rotatably installed in the rotating hole through a rotating shaft. The lifting rod is slidably connected to a sliding hole provided inside the baffle plate.

[0010] As a further description of the above technical solution:

[0011] The material spreading assembly includes a threaded ring frame and a rotating stud. The threaded ring frame is fixedly installed on the inner wall of one side of the machine housing, and the rotating stud is rotatably installed in a rotating hole set at the top of the lifting rod via a rotating shaft.

[0012] As a further description of the above technical solution:

[0013] The rotating stud is threadedly connected to the threaded ring frame. A cleaning head is fixedly installed on the top of the rotating stud. A material support plate is fixedly installed on the outside of the rotating stud. The cleaning head is located directly below the feeding pipe.

[0014] Furthermore, by incorporating a material spreading and cleaning mechanism, during mixing, RAP fine aggregate is first added to the equipment and introduced into the machine casing through the feeding pipe. At this point, the RAP fine aggregate will first fall onto the spreading component of the material spreading and cleaning mechanism. After the RAP fine aggregate is added, the main mixing material is added into the mixing inner cylinder through the feeding pipe. As the amount of added material increases, the pressure on the pressure spring shaft gradually increases. When the pressure on the pressure spring shaft exceeds the limit, the mixing inner cylinder will slowly descend. When the mixing inner cylinder presses against the air cylinder, the gas in the air cylinder can be introduced into the material spreading and cleaning mechanism through the air guide pipe. At this time, the air pressure can drive the lifting rod and piston to slowly rise, and the material spreading and cleaning mechanism will also rise synchronously. Because the rotating stud of the material spreading and cleaning mechanism is threadedly connected to the threaded ring, the rotating stud can carry... The rotating support plate and cleaning head effectively disperse the RAP fine aggregates carried on the support plate over a wide area. Simultaneously, the rotating cleaning head cleans any residual RAP fine aggregates adhering to the inner wall of the feeding pipe. This design utilizes the gravity changes of the raw materials during feeding to effectively and widely disperse the added RAP fine aggregates, thereby improving the uniformity of RAP fine aggregate distribution within the main raw materials and enhancing the mixing effect. It also effectively solves the problem that some mixtures, due to their tendency to clump, experience increased intermolecular attraction after entering the liquid, leading to clumping of fine particles that are difficult to decompose and affect the mixing effect. Furthermore, it simultaneously cleans the inner wall of the feeding pipe, preventing waste of fine particles and improving equipment performance.

[0015] As a further description of the above technical solution:

[0016] The mixing mechanism includes a mounting shaft, which is fixedly mounted on one end of the output shaft of the drive motor. A bottom shaft is fixedly mounted on the bottom end of the mounting shaft, and a spiral blade is fixedly mounted on the outside of the bottom shaft.

[0017] As a further description of the above technical solution:

[0018] Four spiral blades are symmetrically installed about the transverse central axis of the bottom shaft. Two spiral blades form a group, and the spiral directions of the two groups of spiral blades are opposite. Several material holes are provided inside the spiral blades.

[0019] As a further description of the above technical solution:

[0020] A mixing blade is fixedly mounted on the outside of the mounting shaft. An installation groove is provided inside the mixing blade. A self-rotating component is rotatably mounted inside the installation groove. One end of the mixing blade is fixedly connected to the inner wall of one side of the grinding sleeve.

[0021] As a further description of the above technical solution:

[0022] The self-rotating assembly includes a rotating shaft, which is rotatably installed in a rotating hole provided on the mounting groove. A rotating blade is fixedly installed on the outside of the rotating shaft. Torsion springs are fixedly installed on the top and bottom ends of the rotating shaft, and one end of the torsion spring is fixedly connected to the side wall of the mounting groove.

[0023] As a further description of the above technical solution:

[0024] There is a gap between the mixing inner cylinder and the grinding sleeve. A stroke groove is provided on one side of the outer wall of the machine housing. An inlet pipe and an outlet pipe are fixedly installed on the two outer walls of the mixing inner cylinder, respectively. One end of the outlet pipe passes through the stroke groove and extends to the outside of the machine housing.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0026] 1. In this invention, by incorporating a material spreading and cleaning mechanism, during mixing and processing, RAP fine aggregate is first added to the equipment and introduced into the machine casing through a feeding pipe. At this time, the RAP fine aggregate first falls onto the spreading component of the material spreading and cleaning mechanism. After the RAP fine aggregate is added, the main mixing material is added into the mixing inner cylinder through a feeding pipe. As the amount of added raw material increases, the pressure on the bearing spring shaft gradually increases. When the pressure on the bearing spring shaft exceeds the limit, the mixing inner cylinder slowly descends. When the mixing inner cylinder presses against the air cylinder, the gas in the air cylinder can be introduced into the material spreading and cleaning mechanism through a guide pipe. At this time, the air pressure drives the lifting rod and piston to slowly rise, and the material spreading and cleaning mechanism also rises synchronously. Because the rotating stud of the material spreading and cleaning mechanism is threadedly connected to the threaded ring, the rotating stud can drive the bearing plate and cleaning head to rotate. During rotation, the RAP fine aggregate on the bearing plate can be effectively spread widely. The surrounding throw ensures good dispersion of RAP fine aggregates. Simultaneously, when the rotating cleaning head enters the feeding pipe, it cleans any residual RAP fine aggregates adhering to the inner wall of the pipe. This design utilizes the gravity changes of the raw materials during feeding to effectively and widely disperse the added RAP fine aggregates, thereby improving the uniformity of RAP fine aggregate distribution within the main raw materials and enhancing the mixing effect. It also effectively solves the problem that some mixtures, due to their tendency to clump, experience increased intermolecular attraction after entering the liquid, leading to clumping of fine particles that are difficult to decompose and affect the mixing effect. Simultaneously, it cleans the inner wall of the feeding pipe, avoiding waste of fine materials and improving equipment efficiency. Furthermore, the more material carried in the mixing cylinder, the greater the downward movement of the mixing cylinder, resulting in a higher lifting amount of the lifting rod and a longer rotation duration of the cleaning head, further enhancing the dispersion effect of the fine aggregates.

[0027] 2. In this invention, a mixing mechanism is installed. During mixing, the heating element is turned on to increase the temperature inside the equipment, and the drive motor is turned on to rotate the mixing mechanism. The mixing blades can effectively stir the mixture, while the spiral blades can agitate some solutes that have sunk to the bottom of the equipment, allowing the solutes to dissolve effectively. At the same time, during the rotation of the mixing mechanism, the mixed liquid can generate a certain pressure on the self-rotating component. The rotating blades under the pressure of the mixed liquid can deflect. When the pressure is balanced, the torsion spring can drive the rotating shaft and rotating blades to return to their original positions. This process is repeated to achieve effective mixing of the mixture. Through this design, not only can a stable stirring effect be achieved in the mixed liquid, but the solutes in the mixed liquid can also be effectively diffused, ensuring the mixing effect of the mixture. In addition, the self-rotating component can automatically deflect, further improving the mixing effect inside the equipment.

[0028] 3. In this invention, a grinding sleeve is provided outside the mixing mechanism. When the mixing mechanism rotates, the grinding sleeve can be rotated synchronously. When the grinding sleeve rotates, the solid particles existing in the gap between the grinding sleeve and the mixing inner cylinder can be effectively ground. The ground material is easier to mix with the mixing liquid, further improving the mixing effect in the equipment. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of a RAP fine aggregate liquefaction and mixing device.

[0030] Figure 2 This is an exploded three-dimensional structural diagram of a RAP fine aggregate liquefaction and mixing device.

[0031] Figure 3 This is an exploded three-dimensional structural diagram of the mixing inner cylinder and the material spreading and cleaning mechanism in a RAP fine aggregate liquefaction mixing device.

[0032] Figure 4 This is an enlarged exploded three-dimensional structural diagram of the material spreading and cleaning mechanism in a RAP fine aggregate liquefaction and mixing device.

[0033] Figure 5 This is an enlarged three-dimensional structural diagram of the material spreading component in a RAP fine aggregate liquefaction and mixing device.

[0034] Figure 6 This is an enlarged exploded three-dimensional structural diagram of the mixing inner cylinder and mixing mechanism in a RAP fine aggregate liquefaction mixing device.

[0035] Figure 7 This is an enlarged exploded three-dimensional structural diagram of the mixing mechanism in a RAP fine aggregate liquefaction mixing device.

[0036] Figure 8This is an enlarged structural schematic diagram of point A in a RAP fine aggregate liquefaction and mixing device.

[0037] Legend:

[0038] 1. Feeding pipe; 2. Drive motor; 3. Top cover; 4. Machine housing; 5. Discharge pipe; 6. Stroke groove; 7. Grinding sleeve; 8. Mixing inner cylinder; 9. Pressure spring shaft; 10. Air cylinder; 11. Spreading and cleaning mechanism; 111. Spreading assembly; 1111. Cleaning head; 1112. Material receiving plate; 1113. Threaded ring frame; 1114. Rotating stud; 112. Lifting rod; 113. Piston; 114. Rod sleeve; 12. Air guide pipe; 13. Mixing mechanism; 131. Mounting shaft; 132. Mounting groove; 133. Mixing blade; 134. Self-rotating assembly; 1341. Rotating shaft; 1342. Rotating blade; 1343. Torsion spring; 135. Spiral blade; 136. Bottom shaft; 14. Baffle plate. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figure 1-8 This invention provides a technical solution: a RAP fine aggregate liquefaction and mixing device, including a housing 4, a top cover 3 fixedly installed on the top of the housing 4, a feeding pipe 1 and a drive motor 2 fixedly installed on the top of the top cover 3, a pressure-bearing spring shaft 9, an air cylinder 10 and a material spreading and cleaning mechanism 11 fixedly installed on the inner wall of the bottom surface of the housing 4, and when the mixing inner cylinder 8 is in the upper limit state, the spring shaft 9 is in a compressed pre-tightened state (the purpose of setting the pre-tightening force is mainly to prevent the axis position of the mixing inner cylinder 8 from changing when the amount of mixed material is small during the stirring process). The material spreading and cleaning mechanism 11 is used for the extensive spreading of RAP fine aggregate. The top of the pressure-bearing spring shaft 9 is fixedly installed with the mixing inner cylinder 8, and a heating tube is fixedly installed inside the shell cavity of the mixing inner cylinder 8. A mixing mechanism 13 is provided at one end of the output shaft of the drive motor 2. The mixing mechanism 13 is used for the effective mixing of raw materials. A grinding sleeve 7 is fixedly installed on the outside of the mixing mechanism 13, and a baffle plate 14 is fixedly installed on the outer surface of the mixing inner cylinder 8.

[0041] The material spreading and cleaning mechanism 11 includes a rod sleeve 114, a piston 113 is slidably installed inside the rod sleeve 114, and a lifting rod 112 is longitudinally fixedly installed on the top surface of the piston 113. The far end of the lateral part of the lifting rod 112 is inclined downward (to facilitate material dropping, and its lateral and longitudinal parts are connected by a rigid adapter to prevent excessive deformation of the lateral part due to downward bending under force). An air outlet is provided on one side of the outer wall of the air cylinder 10, and an air guide pipe 12 is fixedly installed inside the air outlet. One end of the air guide pipe 12 is sealed to the air outlet provided on the side wall of the rod sleeve 114. A rotating hole is provided at the top of the lifting rod 112, and a material spreading component 111 is rotatably installed in the rotating hole through a rotating shaft. The lifting rod 112 is slidably connected to the sliding hole provided inside the baffle plate 14.

[0042] The material spreading assembly 111 includes a threaded ring frame 1113 and a rotating stud 1114. The threaded ring frame 1113 is fixedly installed on the inner wall of one side of the housing 4. The rotating stud 1114 is rotatably installed in the rotating hole provided at the top of the lifting rod 112 via a rotating shaft. The rotating stud 1114 is threadedly connected to the threaded ring frame 1113. The stud 1114 has trapezoidal or rectangular threads (for good transmission effect). A cleaning head 1111 is fixedly installed at the top of the rotating stud 1114. A material receiving plate 1112 is fixedly installed on the outside of the rotating stud 1114. The cleaning head 1111 is located directly below the feeding pipe 1.

[0043] The specific implementation method is as follows: During the mixing process, RAP fine aggregate is first added to the equipment and introduced into the machine casing 4 through the feeding pipe 1. At this time, the RAP fine aggregate will first fall on the spreading component 111 of the spreading and cleaning mechanism 11. After the RAP fine aggregate is added, the main mixing material is added into the mixing inner cylinder 8 through the feeding pipe. At this time, as the amount of raw material added increases, the pressure on the bearing spring shaft 9 will gradually increase. When the pressure on the bearing spring shaft 9 exceeds the limit (i.e., when the preload of the spring shaft 9 is overcome), the mixing inner cylinder 8 will slowly descend as the material is added. When the mixing inner cylinder 8 presses against the air cylinder 10, the gas in the air cylinder 10 can be introduced into the spreading and cleaning mechanism 11 through the air guide pipe 12. At this time, the air pressure can drive the lifting rod 112 and the piston 113 to slowly rise. At this time, the spreading and cleaning mechanism 11 will also rise synchronously. Since the rotating stud 1114 of the material spreading and cleaning mechanism 11 is threadedly connected to the threaded ring 1113, the rotating stud 1114 can drive the material support plate 1112 and the cleaning head 1111 to rotate. During the rotation, the RAP fine aggregate carried on the material support plate 1112 can be effectively thrown out over a wide range, so that the RAP fine aggregate can be well dispersed. At the same time, when the rotating cleaning head 1111 enters the feeding pipe 1, it can clean the residual RAP fine aggregate adhering to the inner wall of the feeding pipe 1. The more material carried in the mixing inner cylinder 8, the greater the downward movement of the mixing inner cylinder 8. At this time, the lifting amount of the lifting rod 112 is also higher, and the rotation duration of the cleaning head 1111 is longer, thereby further improving the throwing effect of fine aggregate. During the throwing process, the side-spread material will fall on the baffle plate 14 and will not fall into the gap between the mixing inner cylinder 8 and the casing 4.

[0044] This design utilizes the gravity changes of the raw materials during the feeding process to effectively and widely disperse the added RAP fine aggregate, thereby improving the uniformity of RAP fine aggregate distribution within the main raw materials and effectively enhancing the mixing effect. It also effectively solves the problem that some materials, due to their tendency to clump, experience increased intermolecular attraction after entering the liquid, leading to clumping of fine aggregates that are difficult to decompose subsequently, thus affecting the mixing effect. Simultaneously, it allows for the simultaneous cleaning of the inner wall of the feeding pipe 1, avoiding waste of fine materials and improving equipment performance.

[0045] The mixing mechanism 13 includes a mounting shaft 131, which is fixedly mounted on one end of the output shaft of the drive motor 2. A bottom shaft 136 is fixedly mounted on the bottom end of the mounting shaft 131. A spiral blade 135 is fixedly mounted on the outside of the bottom shaft 136. Four spiral blades 135 are symmetrically mounted about the transverse central axis of the bottom shaft 136. Two spiral blades 135 form a group, and the spiral directions of the two groups of spiral blades 135 are opposite. Several material holes are provided inside the spiral blade 135. A mixing blade 133 is fixedly mounted on the outside of the mounting shaft 131. A mounting groove 132 is provided inside the mixing blade 133. A self-rotating component 134 is rotatably mounted inside the mounting groove 132. One end of the mixing blade 133 is fixedly connected to the inner wall of one side of the grinding sleeve 7.

[0046] The self-rotating assembly 134 includes a rotating shaft 1341, which is rotatably installed in a rotating hole provided on the mounting groove 132. A rotating blade 1342 is fixedly installed on the outside of the rotating shaft 1341. Torsion springs 1343 are fixedly installed on the outside of both the top and bottom ends of the rotating shaft 1341. One end of the torsion spring 1343 is fixedly connected to the side wall of the mounting groove 132.

[0047] The specific implementation method is as follows: When mixing, the heating element is turned on to increase the temperature inside the equipment, and the drive motor 2 is turned on to drive the mixing mechanism 13 to rotate. The mixing blade 133 can effectively stir the mixture, and the spiral blade 135 can stir some solutes that have sunk to the bottom of the equipment, so that the solutes can be effectively dissolved. At the same time, during the rotation of the mixing mechanism 13, the mixture can generate a certain pressure on the self-rotating component 134. The rotating blade 1342 under the pressure of the mixture can deflect. When the pressure is balanced, the torsion spring 1343 can drive the rotating shaft 1341 and the rotating blade 1342 to reset. This process is repeated to achieve effective mixing of the mixture.

[0048] This design not only achieves a stable stirring effect on the mixture, but also allows the solute in the mixture to diffuse effectively, ensuring the mixing effect of the mixture. At the same time, the self-rotating component 134 can automatically deflect, further improving the mixing effect within the equipment.

[0049] There is a gap between the mixing inner cylinder 8 and the grinding sleeve 7. A stroke groove 6 is provided on one side of the outer wall of the housing 4. An inlet pipe and an outlet pipe 5 are fixedly installed on the two outer walls of the mixing inner cylinder 8, respectively. One end of the outlet pipe 5 passes through the stroke groove 6 and extends to the outside of the housing 4.

[0050] The specific implementation method is as follows: when the mixing mechanism 13 rotates, it can also drive the grinding sleeve 7 to rotate synchronously. When the grinding sleeve 7 rotates, it can effectively grind the solid particles existing in the gap between the grinding sleeve 7 and the mixing inner cylinder 8. The ground grinding material is easier to mix with the mixing liquid, further improving the mixing effect in the equipment.

[0051] Working principle: During the mixing process, RAP fine aggregate is first added to the equipment and introduced into the machine casing 4 through the feeding pipe 1. At this time, the RAP fine aggregate will first fall onto the spreading component 111 of the spreading and cleaning mechanism 11. After the RAP fine aggregate is added, the main mixing material is added into the mixing inner cylinder 8 through the feeding pipe. At this time, as the amount of raw material added increases, the pressure on the bearing spring shaft 9 will gradually increase. When the pressure on the bearing spring shaft 9 exceeds the limit, the mixing inner cylinder 8 will slowly descend. When the mixing inner cylinder 8 presses against the air cylinder 10, the gas in the air cylinder 10 can pass through the air guide pipe. 12. The material is introduced into the spreading and cleaning mechanism 11. At this time, the air pressure can drive the lifting rod 112 and piston 113 to rise slowly. The spreading and cleaning mechanism 11 will also rise synchronously. Since the rotating stud 1114 of the spreading and cleaning mechanism 11 is threadedly connected to the threaded ring 1113, the rotating stud 1114 can drive the receiving plate 1112 and the cleaning head 1111 to rotate. During the rotation, the RAP fine aggregate carried on the receiving plate 1112 can be effectively thrown out over a wide range, so that the RAP fine aggregate can be well dispersed. At the same time, when the rotating cleaning head 1111 enters the feeding pipe 1, it can clean the material adhering to the inner wall of the feeding pipe 1. As residual RAP fine aggregate is cleaned, and the more material carried in the mixing inner cylinder 8, the greater the downward movement of the mixing inner cylinder 8. At this point, the lifting amount of the lifting rod 112 is also higher, and the rotation duration of the cleaning head 1111 is longer, thereby further improving the scattering effect on the fine aggregate. During mixing, the heating element is turned on to increase the temperature inside the equipment, and the drive motor 2 is turned on to drive the mixing mechanism 13 to rotate. The mixing blade 133 can effectively stir the mixture, while the spiral blade 135 can agitate some solutes that have settled to the bottom of the equipment, allowing the solutes to dissolve effectively. Simultaneously, in the mixing mechanism... During the rotation of the mixing mechanism 13, the mixture can exert a certain pressure on the self-rotating component 134. The rotating blade 1342, which is subjected to the pressure of the mixture, can deflect. When the pressure is balanced, the torsion spring 1343 can drive the rotating shaft 1341 and the rotating blade 1342 to reset. This process is repeated to achieve effective mixing of the mixture. When the mixing mechanism 13 rotates, it can also drive the grinding sleeve 7 to rotate synchronously. When the grinding sleeve 7 rotates, it can effectively grind the solid particles in the gap between the grinding sleeve 7 and the mixing inner cylinder 8. The ground material is easier to mix with the mixture, further improving the mixing effect in the equipment.

[0052] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A RAP fine aggregate liquefaction and mixing device, comprising a housing (4), characterized in that: A top cover (3) is fixedly installed on the top of the housing (4). A feeding pipe (1) and a drive motor (2) are fixedly installed on the top of the top cover (3). A pressure spring shaft (9), an air cylinder (10), and a material spreading and cleaning mechanism (11) are fixedly installed on the inner wall of the bottom surface of the housing (4). The material spreading and cleaning mechanism (11) is used for the extensive spreading of RAP fine aggregate. A mixing inner cylinder (8) is fixedly installed at the top of the pressure spring shaft (9). A heating tube is fixedly installed inside the shell cavity of the mixing inner cylinder (8). A mixing mechanism (13) is provided at one end of the output shaft of the drive motor (2). The mixing mechanism (13) is used for the effective mixing of raw materials. A grinding sleeve (7) is fixedly installed on the outside of the mixing mechanism (13). A baffle plate (14) is fixedly installed on the outer surface of the mixing inner cylinder (8). The material spreading and cleaning mechanism (11) includes a sleeve (114), a piston (113) is slidably installed inside the sleeve (114), a lifting rod (112) is longitudinally fixedly installed on the top surface of the piston (113), and an air outlet is provided on one side of the outer wall of the air cylinder (10), and an air guide pipe (12) is fixedly installed inside the air outlet. One end of the air guide pipe (12) is sealed to the air hole provided on the side wall of the rod sleeve (114). The top end of the lifting rod (112) is provided with a rotating hole. The material spreading component (111) is rotatably installed in the rotating hole through a rotating shaft. The lifting rod (112) is slidably connected to the sliding hole provided inside the baffle plate (14). The material spreading assembly (111) includes a threaded ring frame (1113) and a rotating stud (1114). The threaded ring frame (1113) is fixedly installed on the inner wall of one side of the housing (4), and the rotating stud (1114) is rotatably installed in the rotating hole provided at the top of the lifting rod (112) via a rotating shaft. The rotating stud (1114) is threadedly connected to the threaded ring frame (1113). A cleaning head (1111) is fixedly installed on the top of the rotating stud (1114). A material support plate (1112) is fixedly installed on the outside of the rotating stud (1114). The cleaning head (1111) is located directly below the feeding pipe (1).

2. The RAP fine aggregate liquefaction and mixing device according to claim 1, characterized in that, The mixing mechanism (13) includes a mounting shaft (131), which is fixedly mounted on one end of the output shaft of the drive motor (2). A bottom shaft (136) is fixedly mounted on the bottom end of the mounting shaft (131), and a spiral blade (135) is fixedly mounted on the outside of the bottom shaft (136).

3. The RAP fine aggregate liquefaction and mixing device according to claim 2, characterized in that, Four spiral blades (135) are symmetrically installed about the transverse central axis of the bottom shaft (136). Two spiral blades (135) form a group, and the spiral directions of the two groups of spiral blades (135) are opposite. Several material holes are provided inside the spiral blades (135).

4. The RAP fine aggregate liquefaction and mixing device according to claim 3, characterized in that, A mixing blade (133) is fixedly installed on the outside of the mounting shaft (131). A mounting groove (132) is provided inside the mixing blade (133). A self-rotating component (134) is rotatably installed inside the mounting groove (132). One end of the mixing blade (133) is fixedly connected to the inner wall of one side of the grinding sleeve (7).

5. The RAP fine aggregate liquefaction and mixing device according to claim 4, characterized in that, The self-rotating assembly (134) includes a rotating shaft (1341), which is rotatably installed in a rotating hole provided on the mounting groove (132). A rotating blade (1342) is fixedly installed on the outside of the rotating shaft (1341). Torsion springs (1343) are fixedly installed on the outside of both the top and bottom ends of the rotating shaft (1341). One end of the torsion spring (1343) is fixedly connected to the side wall of the mounting groove (132).

6. The RAP fine aggregate liquefaction and mixing device according to claim 1, characterized in that, There is a gap between the mixing inner cylinder (8) and the grinding sleeve (7). A stroke groove (6) is provided on one side of the outer wall of the housing (4). An inlet pipe and an outlet pipe (5) are fixedly installed on the two sides of the outer wall of the mixing inner cylinder (8). One end of the outlet pipe (5) passes through the stroke groove (6) and extends to the outside of the housing (4).

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