Asphalt waste powder-based green cementing material concrete stirring device and construction method

Abstract

The invention belongs to the technical field of concrete stirring devices, and provides an adaptive device and a construction method for solving the problems that residues of existing equipment are difficult to clear and the material ratio and the stirring quality are damaged due to the fact that an asphalt waste powder-based material is high in adhesiveness and easy to solidify at a low temperature in order to meet the resource utilization requirement of asphalt waste powder. The core of the device comprises three functional modules: the stirring module can realize global mixing of materials and preliminarily scrape away materials adhered to the barrel wall at the same time; the heating module uniformly conducts heat through heating liquid, so that material solidification in the stirring stage can be prevented, and residues can be softened in the cleaning stage; the cleaning module can drive the component to do vertical reciprocating motion, and residues on the barrel wall and the stirring component are removed in all directions. The construction comprises the steps of stirring and discharging, heating assisting and scraping and cleaning. The problem of residual pollution is effectively solved, the material purity and the matching precision are guaranteed, energy consumption can be reduced, and recycling of the waste asphalt powder and large-scale application of low-carbon building materials are facilitated.

Description

Technical Field

[0001] This invention relates to the field of concrete mixing equipment technology, and in particular to a concrete mixing equipment and construction method for asphalt waste powder-based green cementitious materials. Background Technology

[0002] The construction industry has seen a significant increase in demand for the resource utilization of industrial solid waste. Asphalt waste powder, a common solid waste generated from road milling and asphalt product processing, not only occupies land but also easily causes environmental pollution when accumulated over a long period. Combining it with cementitious materials and aggregates to prepare green concrete can reduce both solid waste and the use of high-carbon raw materials such as cement, becoming an important development direction for low-carbon building materials. However, the large-scale application of such materials relies on mixing equipment adapted to the "low-temperature easy solidification and high adhesion" characteristics of asphalt waste powder to ensure mixing quality and efficiency.

[0003] When existing concrete mixing equipment processes asphalt waste powder-based materials, due to the strong adhesion and temperature sensitivity of asphalt waste powder-based concrete, stubborn residues are easily formed on the inner wall of the mixing tank and the surface of the mixing components after mixing, which are difficult to completely remove. If the residual asphalt waste powder-based material is not completely cleaned, the newly added material will mix with the residual material in the next mixing. Not only may the residual material have aged and changed its properties, but it will also destroy the preset proportions, ultimately causing key indicators such as the strength and uniformity of the mixed output to deviate from the standards, resulting in a decline in production quality. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a mixing device and construction method for asphalt waste powder-based green cementitious concrete, aiming to improve the problem that asphalt waste powder-based concrete is difficult to completely remove from the mixing device, resulting in a decline in production quality.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a concrete mixing device for asphalt waste powder-based green cementitious materials, comprising a concrete mixing device, wherein the concrete mixing device includes an outer wall, and a mixing drum is fixedly installed inside the outer wall. A heating groove is formed between the outer wall and the mixing drum. The mixing drum is equipped with a mixing device for mixing concrete materials and a cleaning device for cleaning residual materials on the inner wall of the mixing drum. A heating device for heating the side wall area of ​​the mixing drum is arranged around the heating groove. A heating ring is fixedly installed on the top of the concrete mixing device. The mixing device includes a drive motor, a rotating shaft, a rotating disk, and several mixing rods. The drive motor is fixedly installed at the upper end of the mixing drum. A reduction gear assembly is fixedly connected to the output shaft of the drive motor. The rotating shaft is fixedly connected to the reduction gear assembly. The rotating shaft passes through the mixing drum and is rotatably connected to the mixing drum. The rotating disk is connected to... The bottom end of the rotating shaft is fixedly connected, and the stirring rod is fixedly connected to the bottom end of the rotating disk. Several stirring rods are evenly distributed around the circumference of the rotating disk and fit against the inner wall of the mixing tank. The cleaning device includes gear one, gear two, electromagnetic clutch one, electromagnetic clutch two, a double-acting screw, and cleaning blocks. Gear one and gear two are installed inside the rotating disk. The diameter of gear one is larger than the diameter of gear two. The rotating shaft extends to the bottom end of the rotating disk. Gear one is fixedly sleeved on the rotating shaft. Electromagnetic clutch one is installed between the rotating shaft and gear one. Electromagnetic clutch two is installed between the rotating shaft and the rotating disk. Several gear twos are evenly distributed around the circumference of the gear and mesh with gear one. Several double-acting screws are coaxially fixedly connected to gear two. The double-acting screws extend downward to the lower end of the mixing tank. Several cleaning blocks are threadedly connected to the double-acting screws. The cleaning blocks fit against the inner wall of the mixing tank.

[0006] Preferably, the heating device includes heating rods, heaters, and heating liquid. The heating tank is an annular tank. Several heating rods are evenly distributed along the inner circumference of the heating tank. The heaters are fixed inside the heating ring and electrically connected to the heating rods. The heaters are used to supply power to the heating rods. The heating liquid is filled in the heating tank and is used to evenly conduct the heat generated by the heating rods to the outer wall of the stirring tank.

[0007] Preferably, a wire is fixed to the outer surface of the heating ring, one end of which passes through the heating ring and connects to the heater, and the other end extends to the outside of the concrete mixing equipment and is used to connect to an external power source.

[0008] Preferably, the rotating disk is fixedly provided with a plurality of limiting blocks one and a limiting block two. Each pair of limiting blocks one is rotatably connected to a bidirectional lead screw, and the limiting block two is rotatably connected to the rotating shaft.

[0009] Preferably, both the first limiting block and the second limiting block are metal blocks and are welded and fixed to the inner wall of the rotating disk. Wear-resistant pads are provided at the rotational engagement points of the bidirectional lead screw and the first limiting block, and the rotating shaft and the second limiting block.

[0010] Preferably, the bottom of the mixing tank is provided with a discharge port, and a discharge valve is fixedly installed at the discharge port.

[0011] Preferably, the reduction assembly includes gear three and gear four. Gear three is rotatably connected to the output shaft of the drive motor, gear four meshes with gear three for transmission, and gear four is rotatably sleeved on the rotating shaft. The diameter of gear four is larger than that of gear three.

[0012] Preferably, the concrete mixing equipment has a feed inlet on its side, one end of which extends to the outside of the equipment, and the other end passes through the outer wall and the side wall of the mixing drum and enters the inside of the mixing drum.

[0013] Preferably, any of the cleaning blocks slides into contact with the two mixing rods on both sides to scrape off the concrete material remaining on the surface of the mixing rods.

[0014] A construction method for an asphalt waste powder-based green cementitious concrete mixing device includes the following steps:

[0015] S1: Prepare asphalt waste powder, cementitious materials, aggregates and admixtures according to the proportion, mix them evenly and put them into the mixing tank through the feed inlet to complete the feeding;

[0016] S2: When electromagnetic clutch one is energized and electromagnetic clutch two is de-energized, the drive motor is started. The drive motor drives the rotating disk to rotate through the reduction assembly and rotating shaft, so that the stirring rod moves in a circular motion along the inner wall of the mixing tank to stir and mix the materials. During the stirring process, the design of the stirring rod to fit against the tank wall can initially scrape off the adhering materials.

[0017] S3: After mixing is complete, turn off the drive motor and open the discharge valve. The mixed material is discharged to the outside of the concrete mixing equipment through the discharge port.

[0018] S4: When it is necessary to clean the residual material inside the mixing tank, the staff connects the heater to an external power source through the wire, turns on the heater, and the heater transfers heat to the heating ring and heating rod. The heating rod heats the heating liquid in the heating tank and conducts the heat to the surface of the mixing tank, heating and softening the residual material adhering to the tank wall.

[0019] S5: When electromagnetic clutch one is energized and electromagnetic clutch two is de-energized, the drive motor is started. The drive motor drives the rotating shaft to rotate through the reduction assembly. The rotating shaft drives gear one to rotate. Gear one meshes with and drives gear two and the double-acting screw to rotate. The rotation of the double-acting screw drives the cleaning block to move vertically back and forth, scraping off the residual material on the surface of the barrel.

[0020] S6: After cleaning is completed, turn off the drive motor and heater, and reset the cleaning block to the initial position. In stages S1-S3, if the material flow is not smooth or the stirring is obstructed, the heating device can be started in advance to ensure smooth material flow and improve stirring efficiency.

[0021] The present invention has the following beneficial effects:

[0022] 1. In this invention, the stirring rod rotates with the rotating disc to achieve thorough mixing of materials, and its design for adhering to the inner wall of the mixing drum can initially scrape off adhering materials; the cleaning device is driven by a drive motor to drive a gear set, causing the cleaning block to move radially along the lead screw and closely adhere to the drum wall, thereby removing residual materials; the heating ring heats the top area of ​​the mixing drum, which can prevent asphalt waste powder from solidifying due to cooling and thus aggravating adhesion, providing assistance for cleaning; with the synergistic effect of the three, it can not only avoid residual materials on the drum wall after mixing, but also prevent the mixing and contamination of new and old materials during the next mixing, effectively ensuring the purity and quality stability of the mixed output.

[0023] 2. In this invention, the stirring rods are evenly distributed around the circumference of the rotating disk and adhere to the barrel wall. During rotation and stirring, they can both initially scrape off the adhering materials and achieve full mixing of the materials throughout the entire area. The cleaning block adheres to the stirring rods and can scrape off the materials attached to the sides of the stirring rods when cleaning the residual materials on the barrel wall. At the same time, the adhesion of the stirring rods to the two sides of the cleaning block also guides the vertical reciprocating motion of the cleaning block. The first and second limiting blocks in the rotating disk provide stable support for the lead screw and the rotating shaft, respectively. With wear-resistant pads, the wear of the components can be reduced and the service life of the device can be extended. The bidirectional lead screw does not require an additional reversing mechanism. It can drive the cleaning block to achieve vertical reciprocating motion through unidirectional drive, which can efficiently scrape off the residual materials on the mixing barrel wall and the stirring rods.

[0024] 3. The fluidity of the heating liquid, combined with the annular design of the heating tank, can prevent deformation and cracking of the mixing tank due to local overheating, thus extending the service life of the tank. At the same time, it can prevent the material from solidifying and clumping due to local cooling, reducing the risk of the stirring rod sticking to the tank wall and protecting the drive motor from overload damage. In addition, the heat storage characteristics of the heating liquid can reduce the rapid loss of heat, reduce the frequency of the heater starting and stopping to maintain the temperature, and indirectly reduce power consumption. Attached Figure Description

[0025] Figure 1 This is a perspective view of the asphalt waste powder-based green cementitious material concrete mixing device of the present invention;

[0026] Figure 2 This is a three-dimensional cross-sectional view of the asphalt waste powder-based green cementitious material concrete mixing device of the present invention. Figure 1 ;

[0027] Figure 3This is a three-dimensional cross-sectional view of the asphalt waste powder-based green cementitious material concrete mixing device of the present invention. Figure 2 ;

[0028] Figure 4 This is a schematic diagram of the front cross-sectional structure of the upper part of the mixing tank in this invention;

[0029] Legend:

[0030] 1. Concrete mixing equipment; 2. Mixing drum; 3. Heating ring; 4. Drive motor; 5. Feed inlet; 6. Discharge outlet; 7. Discharge valve; 8. Wire; 9. Rotating disc; 10. Double-acting lead screw; 11. Cleaning block; 12. Mixing rod; 13. Outer wall; 14. Heating tank; 15. Heating rod; 16. Rotating shaft; 17. Gear 1; 18. Gear 2; 19. Electromagnetic clutch 1; 20. Limiting block 1; 21. Limiting block 2; 22. Heater; 23. Gear 3; 24. Gear 4; 25. Electromagnetic clutch 2. Detailed Implementation

[0031] 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.

[0032] Reference Figure 1-4An embodiment of the present invention provides a concrete mixing device for asphalt waste powder-based green cementitious materials, comprising a concrete mixing device 1, an outer wall 13, a mixing drum 2 fixedly disposed inside the outer wall 13, a heating groove 14 formed between the outer wall 13 and the mixing drum 2, a mixing device for mixing concrete materials and a cleaning device for cleaning residual materials on the inner wall of the mixing drum 2 installed inside the mixing drum 2, a heating device for heating the side wall area of ​​the mixing drum 2 arranged around the heating groove 14, and a heating ring 3 fixedly disposed on the top of the concrete mixing device 1; the mixing device includes a drive motor 4, a rotating shaft 16, a rotating disk 9 and several mixing rods 12, the drive motor 4 is fixedly disposed on the upper end of the mixing drum 2, a reduction gear is fixedly connected to the output shaft of the drive motor 4, the rotating shaft 16 is fixedly connected to the reduction gear, the rotating shaft 16 passes through the mixing drum 2 and is rotatably connected to the mixing drum 2, the rotating disk 9 is fixedly connected to the bottom end of the rotating shaft 16, and the mixing rods 12 are fixedly connected to the rotating shaft 16. The bottom of the rotating disk 9 is fixedly connected, and several stirring rods 12 are evenly distributed around the circumference of the rotating disk 9 and fit against the inner wall of the stirring tank 2; the cleaning device includes gear 17, gear 28, electromagnetic clutch 19, electromagnetic clutch 25, double-acting screw 10, and cleaning block 11. Gear 17 and gear 28 are installed inside the rotating disk 9. The diameter of gear 17 is larger than that of gear 28. The rotating shaft 16 extends to the bottom of the rotating disk 9, and gear 17 is fixedly sleeved on the rotating shaft 16. Above, electromagnetic clutch 19 is installed between rotating shaft 16 and gear 17, electromagnetic clutch 25 is installed between rotating shaft 16 and rotating disk 9, several gears 28 are evenly distributed around gear 17 and mesh with gear 17, several bidirectional lead screws 10 are coaxially fixedly connected to gears 28, the bidirectional lead screws 10 extend downward to the lower end of mixing tank 2, several cleaning blocks 11 are threadedly connected to bidirectional lead screws 10, and the cleaning blocks 11 are attached to the inner wall of mixing tank 2.

[0033] The heating device includes heating rods 15, heaters 22, and heating liquid. The heating tank 14 is an annular groove with several heating rods 15 evenly distributed along its inner circumference. The heaters 22 are fixed inside the heating ring 3 and electrically connected to the heating rods 15, supplying power to them. The heating liquid fills the heating tank 14 and evenly conducts the heat generated by the heating rods 15 to the outer wall of the mixing tank 2. A wire 8 is fixed to the outer surface of the heating ring 3. One end of the wire 8 passes through the heating ring 3 and connects to the heater 22, while the other end extends to the outside of the concrete mixing equipment 1 and is used to connect to an external power source. Several limiting blocks 1 20 and one limiting block 21 are fixedly installed inside the rotating disk 9. Every two limiting blocks 1 20 are rotatably connected to a bidirectional lead screw 10, and the limiting block 21 is rotatably connected to the rotating shaft 16. Both limit block 1 20 and limit block 2 21 are metal blocks and are welded and fixed to the inner wall of the rotating disk 9. Wear-resistant gaskets are provided at the rotational engagement points of the bidirectional lead screw 10 and limit block 1 20, and the rotating shaft 18 and limit block 2 21. The bottom of the mixing tank 2 is provided with a discharge port 6, and a discharge valve 7 is fixedly installed at the discharge port 6. The reduction assembly includes gear 3 23 and gear 4 24. Gear 3 23 is rotatably connected to the output shaft of the drive motor 4, and gear 4 24 meshes with gear 3 23 for transmission. Gear 4 24 is rotatably sleeved on the rotating shaft 16, and the wheel diameter of gear 4 24 is larger than that of gear 3 23. The side of the concrete mixing equipment 1 is provided with a feed port 5. One end of the feed port 5 extends to the outside of the equipment, and the other end passes through the outer wall 11 and the side wall of the mixing tank 2 and enters the interior of the mixing tank 2. The arbitrary cleaning block 11 slides against the mixing rods 12 on both sides to scrape off the concrete material remaining on the surface of the mixing rods 12.

[0034] The specific implementation method is as follows: First, ensure that the electromagnetic clutch coil 19 and electromagnetic clutch coil 25 in the cleaning device are de-energized. Accurately weigh the asphalt waste powder, cementitious materials, aggregates and admixtures according to the preset ratio. After mixing all kinds of materials evenly on the outside, put them into the mixing drum 2 through the feed port 5 on the side of the concrete mixing equipment 1 to complete the feeding operation and ensure that the initial mixing state of the materials is stable, laying the foundation for the uniformity of subsequent mixing. Start the drive motor 4 fixed at the upper end of the mixing drum 2. The output shaft of the drive motor 4 drives the reduction assembly to rotate, which in turn drives the rotating shaft 16 fixedly connected to the reduction assembly to rotate. At this time, the electromagnetic clutch coil 25 is energized, so that the rotating shaft 16 is rigidly connected to the rotating disk 9, and the rotating disk 9 rotates synchronously with the rotating shaft 16. Several stirring rods 12 are fixed at the bottom of the rotating disk 9 and evenly distributed around the circumference. When the stirring rods 12 rotate with the rotating disk 9, they will make a circular motion along the inner wall of the mixing drum 2 to mix the materials in the drum throughout the entire area and avoid local material accumulation. Meanwhile, the close fit design between the stirring rod 12 and the inner wall of the mixing tank 2 can initially scrape off the material adhering to the tank wall during the mixing process, reducing excessive material adhesion and ensuring mixing efficiency and uniformity. If material flow is obstructed or mixing is hindered during the mixing process, the heating device can be activated in advance to assist. After the material is mixed to meet the quality requirements, the drive motor 4 is turned off, the power supply to the electromagnetic clutch coil 25 is disconnected, and the discharge valve 7 on the discharge port 6 at the bottom of the mixing tank 2 is opened. The mixed concrete material will be naturally discharged to the outside of the concrete mixing equipment 1 through the discharge port 6, completing the entire mixing process.

[0035] The heating operation is mainly divided into two scenarios: auxiliary heating when material flow is obstructed during the mixing stage, and heating to soften residual materials during the cleaning stage. In both scenarios, the heater 22 inside the heating ring 3 must first be connected to an external power source via the wire 8 on the outer surface of the heating ring 3 to provide power to the heating device. After the heater 22 is activated, it simultaneously transfers heat to the heating ring 3 and the heating rods 15 evenly distributed along the inner circumference of the heating tank 14. The heated rods 15, after being heated, heat the heating liquid in the heating tank 14. Due to the good fluidity of the heating liquid, the heat generated by the heating rods 15 can be evenly conducted to the outer wall of the mixing tank 2, preventing localized overheating or uneven heating of the mixing tank 2. During the mixing stage, heating can prevent asphalt waste powder from solidifying and clumping due to low temperature, ensuring smooth material flow within the mixing tank 2, reducing the risk of the mixing rods 12 getting stuck, and improving mixing efficiency. During the cleaning stage, heating can soften the residual materials adhering to the wall of the mixing tank 2, reducing the adhesion between the residual materials and the wall of the mixing tank 2, facilitating subsequent scraping and cleaning. Meanwhile, the heat storage characteristics of the heating liquid can reduce the rapid loss of heat, reduce the frequency of frequent start-stop of the heater 22 to maintain the temperature, indirectly reduce power consumption, and the cooperation between the annular heating tank 14 and the heating liquid can avoid deformation and cracks caused by local overheating of the stirring tank 2, and extend the service life of the tank.

[0036] After mixing is complete and all materials are discharged, if it is necessary to clean the residual materials on the inner wall of the mixing tank 2 and the surface of the mixing rod 12, the heating device must be activated according to the heating procedure to heat the outer wall of the mixing tank 2. This will soften the residual materials adhering to the wall of the mixing tank 2, reducing the scraping resistance. The heating should be maintained until the residual materials are in a stable softened state before proceeding to the scraping operation stage. The electromagnetic clutch coil 19 should be energized, while the electromagnetic clutch coil 25 should be de-energized (disconnecting the rotating shaft 16 from the rotating disk 9, keeping the rotating disk 9 stationary). The drive motor 4 should be restarted, and the drive motor 4 will drive the gear 17 to rotate via the reduction assembly and the rotating shaft 16. Since several gears 18 are evenly distributed around the circumference of gear 17 and mesh with gear 17, gear 17 will drive gears 18 to rotate synchronously. Each gear 18 is coaxially fixedly connected to a double-acting screw 10. The double-acting screw 10 will rotate independently around its own axis along with gear 18. The double-acting screw 10 extends downward to the lower end of the mixing tank 2 and cooperates with the threaded cleaning block 11. When the double-acting screw 10 rotates, it will drive the cleaning block 11 to make vertical reciprocating motion along the screw, scraping off the residual material on the surface of the tank wall. In addition, the cleaning block 11 slides and fits against the two stirring rods 12 on both sides. While scraping off the residue on the wall of the mixing tank 2, it can also simultaneously scrape off the material attached to the surface of the stirring rods 12, so as to avoid the residue on the stirring rods 12 affecting the next mixing. After all the residual material is scraped off, the drive motor 4 and the heater 22 are turned off, the power supply of the electromagnetic clutch coil 19 is disconnected, and the bidirectional lead screw 10 is rotated in the opposite direction by briefly reversing the drive motor, which drives the cleaning block 11 to return to the initial position, thus completing the entire scraping and cleaning process. This ensures that there is no residue inside the mixing tank 2 and the stirring components, and provides a guarantee for the purity and proportioning accuracy of the material in the next mixing.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A concrete mixing device for asphalt waste powder-based green cementitious materials, comprising concrete mixing equipment (1), characterized in that: The concrete mixing equipment (1) includes an outer wall (13), and a mixing drum (2) is fixedly installed inside the outer wall (13). A heating groove (14) is provided between the outer wall (13) and the mixing drum (2). The mixing drum (2) is equipped with a mixing device for mixing concrete materials and a cleaning device for cleaning residual materials on the inner wall of the mixing drum (2). A heating device for heating the side wall area of ​​the mixing drum (2) is arranged around the heating groove (14). A heating ring (3) is fixedly installed on the top of the concrete mixing equipment (1). The stirring device includes a drive motor (4), a rotating shaft (16), a rotating disk (9), and several stirring rods (12). The drive motor (4) is fixedly installed on the upper end of the stirring tank (2). The output shaft of the drive motor (4) is fixedly connected to a reduction gear assembly. The rotating shaft (16) is fixedly connected to the reduction gear assembly. The rotating shaft (16) passes through the stirring tank (2) and is rotatably connected to the stirring tank (2). The rotating disk (9) is fixedly connected to the bottom end of the rotating shaft (16). The stirring rods (12) are fixedly connected to the bottom end of the rotating disk (9). Several stirring rods (12) are evenly distributed around the circumference of the rotating disk (9) and fit against the inner wall of the stirring tank (2). The cleaning device includes a first gear (17), a second gear (18), an electromagnetic clutch (19), an electromagnetic clutch (25), a two-way lead screw (10), and a cleaning block (11). The first gear (17) and the second gear (18) are installed inside the rotating disk (9). The diameter of the first gear (17) is larger than that of the second gear (18). The rotating shaft (16) extends to the bottom of the rotating disk (9). The first gear (17) is fixedly sleeved on the rotating shaft (16). The first electromagnetic clutch (19) is installed on the rotating shaft (16). Between gear one (17), the electromagnetic clutch two (25) is installed between the rotating shaft (16) and the rotating disk (9). Several gear two (18) are evenly distributed around gear one (17) and mesh with gear one (17). Several bidirectional screws (10) are coaxially fixedly connected to gear two (18). The bidirectional screws (10) extend downward to the lower end of the mixing tank (2). Several cleaning blocks (11) are threadedly connected to the bidirectional screws (10). The cleaning blocks (11) are attached to the inner wall of the mixing tank (2).

2. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 1, characterized in that: The heating device includes heating rods (15), heaters (22), and heating liquid. The heating tank (14) is an annular groove. Several heating rods (15) are evenly distributed along the inner circumference of the heating tank (14). The heaters (22) are fixed inside the heating ring (3) and electrically connected to the heating rods (15). The heaters (22) are used to supply power to the heating rods (15). The heating liquid is filled in the heating tank (14) and is used to evenly conduct the heat generated by the heating rods (15) to the outer wall of the stirring tank (2).

3. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 2, characterized in that: A wire (8) is fixed on the outer surface of the heating ring (3). One end of the wire (8) passes through the heating ring (3) and connects to the heater (22), while the other end extends to the outside of the concrete mixing equipment (1) and is used to connect to an external power source.

4. The asphalt waste powder-based green cementitious concrete mixing device according to claim 1, characterized in that: The rotating disk (9) is fixedly provided with several limiting blocks one (20) and one limiting block two (21). Each pair of limiting blocks one (20) is rotatably connected to a bidirectional lead screw (10), and the limiting block two (21) is rotatably connected to the rotating shaft (16).

5. The asphalt waste powder-based green cementitious concrete mixing device according to claim 4, characterized in that: Both the first limiting block (20) and the second limiting block (21) are metal blocks and are welded and fixed to the inner wall of the rotating disk (9). Wear-resistant pads are provided at the rotational engagement points of the bidirectional screw (10) and the first limiting block (20), and the rotating shaft (16) and the second limiting block (21).

6. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 1, characterized in that: The bottom of the mixing tank (2) is provided with a discharge port (6), and a discharge valve (7) is fixedly installed at the discharge port (6).

7. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 1, characterized in that: The deceleration assembly includes gear three (23) and gear four (24). Gear three (23) is rotatably connected to the output shaft of the drive motor (4). Gear four (24) meshes with gear three (23) for transmission. Gear four (24) is rotatably mounted on the rotating shaft (16). The diameter of gear four (24) is larger than that of gear three (23).

8. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 1, characterized in that: The concrete mixing equipment (1) is provided with a feed inlet (5) on its side. One end of the feed inlet (5) extends to the outside of the equipment, and the other end passes through the outer wall (13) and the side wall of the mixing tank (2) and enters the interior of the mixing tank (2).

9. The asphalt waste powder-based green cementitious material concrete mixing device according to claim 1, characterized in that: Any of the cleaning blocks (11) slides against the two sides of the mixing rods (12) to scrape off the concrete material remaining on the surface of the mixing rods (12).

10. A construction method for a green cementitious concrete mixing device based on asphalt waste powder, characterized in that: Includes the following steps: S1: Prepare asphalt waste powder, cementitious materials, aggregates and admixtures according to the proportion, mix them evenly and put them into the mixing tank (2) through the feed inlet (5) to complete the feeding; S2: Electromagnetic clutch one (19) is energized, electromagnetic clutch two (25) is de-energized, drive motor (4) is started, and the rotating disk (9) is driven to rotate through the deceleration assembly and rotating shaft (16), so that the stirring rod (12) moves in a circle along the inner wall of the mixing barrel (2) to mix the material. During the mixing process, the contact design between the stirring rod (12) and the barrel wall can initially scrape off the adhering material. S3: After mixing is complete, turn off the drive motor (4), open the discharge valve (7), and discharge the mixed material through the discharge port (6) to the outside of the concrete mixing equipment (1); S4: When it is necessary to clean the residual material inside the mixing tank (2), the staff connects the heater (22) to the external power supply through the wire (8) and starts the heater (22). The heater (22) transfers heat to the heating ring (3) and the heating rod (15). The heating rod (15) heats the heating liquid in the heating tank (14) and conducts the heat to the surface of the mixing tank (2) to heat and soften the residual material adhering to the tank wall. S5: When the first electromagnetic clutch (19) is energized and the second electromagnetic clutch (25) is de-energized, the drive motor (4) is started. The drive motor (4) drives the rotating shaft (16) to rotate through the reduction assembly. The rotating shaft (16) drives the first gear (17) to rotate. The first gear (17) meshes with the second gear (18) and the double-acting screw (10) to rotate. The rotation of the double-acting screw (10) drives the cleaning block (11) to move vertically back and forth to scrape off the residual material on the surface of the barrel. S6: After cleaning, turn off the drive motor (4) and heater (22), and reset the cleaning block (11) to the initial position. In the S1-S3 stage, if the material flow is not smooth or the stirring is blocked, the heating device can be started in advance to ensure smooth material flow and improve stirring efficiency.

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