High-RAP-mixing-amount normal-temperature recycled asphalt mixture mixing device

Abstract

The utility model discloses a high RAP mixing amount normal temperature recycled asphalt mixture mixing device, which belongs to the field of recycled asphalt, and comprises a frame and a conveying mechanism, a mixing bin is arranged at the upper part in the frame, the top of the mixing bin is open, the top of the mixing bin is hinged with a bin door, a driving unit is fixed on one side of the frame, and the driving unit is fixed on the other side of the frame. The output end of the driving unit is provided with a rotating shaft, the rotating shaft rotatably penetrates through the mixing bin, the surface of the rotating shaft is uniformly provided with a plurality of stirring plates, the stirring plates are arranged in the mixing bin, the bottom of the mixing bin is provided with a discharging hole, the lower surface of the mixing bin is provided with a discharging bin, and the discharging bin corresponds to the discharging hole in the bottom of the mixing bin. And the conveying mechanism is arranged at the bottom of the mixing bin so as to convey the mixed materials, the mixed asphalt materials fall onto the material shaking plate firstly, and the asphalt is shaken to be scattered and uniformly scattered on the surface of the conveying belt through vibration of the material shaking plate, so that solidification after accumulation is prevented, and reheating in subsequent use is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of recycled asphalt, and more specifically to a high RAP content recycled asphalt mixture mixing device at room temperature. Background Art

[0002] High-RAP asphalt refers to asphalt that contains a high proportion of recycled asphalt pavement material in the fresh asphalt mix. RAP is the material obtained by milling and crushing old asphalt pavement, and it contains old asphalt and aggregate. Generally speaking, when the RAP content exceeds a certain percentage (such as above 30%), it is considered high-RAP asphalt. The quality of the recycled asphalt depends on the quality of the production mix.

[0003] For example, the prior art discloses an asphalt supply system for producing asphalt mixture (patent announcement number: CN221543380U), in which a conveying device is placed at the bottom of the mixing equipment to convey the mixed recycled material. After the mixing is completed, the asphalt will be poured out through the discharge port at the bottom. However, the asphalt poured out directly is prone to accumulation and agglomeration. If the agglomerates solidify after transportation, it will affect the subsequent heating. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a room temperature recycled asphalt mixture mixing device with a high RAP content, which can shake out the asphalt during discharge to prevent agglomeration.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A high RAP content room temperature recycled asphalt mixture mixing device comprises a frame and a conveying mechanism, a mixing bin is installed above the interior of the frame, the top of the mixing bin is open, and a bin door is hinged on the top of the mixing bin, a driving unit is fixed on one side of the frame, a rotating shaft is installed on the output end of the driving unit, the rotating shaft rotates through the mixing bin, a plurality of mixing plates are evenly arranged on the surface of the rotating shaft, the mixing plates are placed inside the mixing bin, a discharge hole is opened at the bottom of the mixing bin, a discharge bin is provided on the lower surface of the mixing bin, the discharge bin corresponds to the discharge hole at the bottom of the mixing bin, a sealing slide is slidably installed inside the discharge bin, a control cylinder is provided on one side of the discharge bin, the output end of the control cylinder is installed on the sealing slide, a shaking plate is hinged on the rear side of the interior of the discharge bin, the front end of the shaking plate is inclined downward, the shaking plate is placed below the sealing slide, the conveying mechanism is placed on one side of the interior of the frame, and the conveying mechanism is placed directly below the shaking plate.

[0009] Furthermore, crossbeams are symmetrically arranged on both sides of the frame, a transmission shaft is rotatably installed between the two crossbeams, the transmission shaft is arranged parallel to the rotating shaft, the transmission shaft is placed on the rear side of the shaking plate, and an eccentric wheel is arranged on the surface of the transmission shaft.

[0010] Furthermore, a raised portion is provided at the center of the back of the shaking plate, and the raised portion contacts the eccentric wheel.

[0011] Furthermore, a driving pulley is provided at one end of the rotating shaft away from the driving unit, and the driving pulley is placed outside the mixing bin. A driven pulley is provided at one end of the transmission shaft, and the driven pulley is on the same side as the driving pulley. A belt is provided between the driven pulley and the driving pulley.

[0012] Furthermore, a lower extension plate is provided at the bottom of the rear side of the discharge bin, a slide groove is provided on the surface of the lower extension plate, and a connecting rod is hinged to the back of the shaking plate, and the connecting rod passes through the slide groove.

[0013] Furthermore, an adjusting nut is screwed on the surface of the connecting rod, and the adjusting nut is placed on the rear side of the lower extension plate. A spring is sleeved on the surface of the connecting rod, and the spring is placed between the lower extension plate and the adjusting nut.

[0014] 3. Beneficial effects

[0015] Compared with the existing technology, the advantages of the present invention are: the present invention provides a room temperature recycled asphalt mixture mixing device with a high RAP content, and a conveying mechanism is provided at the bottom of the mixing bin to transport the mixed materials. The mixed asphalt material will first fall onto the shaking plate, and the vibration of the shaking plate will shake the asphalt apart and evenly scatter it onto the surface of the conveyor belt to prevent it from solidifying after accumulation, so as to facilitate reheating during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the installation structure of the mixing equipment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the discharging bin and the shaking plate installation of the utility model;

[0018] Figure 3 This is a schematic diagram of the rear view structure of the discharge bin of the present utility model.

[0019] Explanation of the numbers in the figure: 1. Frame; 101. Crossbeam; 2. Mixing bin; 201. Bin door; 3. Drive unit; 301. Rotating shaft; 4. Mixing plate; 5. Driving pulley; 6. Transmission shaft; 601. Driven pulley; 602. Eccentric wheel; 7. Belt; 8. Discharging bin; 801. Sealing slide; 802. Lower extension plate; 803. Slide; 804. Control cylinder; 9. Shaking plate; 901. Protrusion; 10. Connecting rod; 11. Adjusting nut; 12. Spring; 13. Conveying mechanism. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] Example:

[0022] See also Figure 1 and Figure 2 As shown in the figure, a high RAP content room temperature recycled asphalt mixture mixing device,

[0023] Pre-treating RAP materials: Before use, RAP materials need to be screened to remove impurities such as dirt and garbage. They are also crushed to a particle size that meets the grading requirements for the asphalt mixture. Generally speaking, the maximum particle size of the RAP material should not exceed the maximum particle size of the new aggregate.

[0024] Adjusting the mix design: Because RAP already contains asphalt, designing the mix design for high-RAP asphalt mixtures requires accurate measurement of the asphalt content and adjusting the amounts of new asphalt and aggregate accordingly. It's also important to consider adding appropriate rejuvenating agents to improve the properties of the old asphalt and allow it to blend better with the new asphalt. Rejuvenating agents can restore some of the old asphalt's properties, reducing its viscosity and increasing its flexibility.

[0025] Strictly control the mixing temperature and time: In order to fully mix the old asphalt and the new asphalt, the mixing temperature of the high RAP content asphalt mixture is generally 10-20℃ higher than that of the ordinary asphalt mixture, and the mixing time should be appropriately extended. For example, the mixing temperature of the ordinary asphalt mixture may be 150-160℃, while the mixing temperature of the high RAP content asphalt mixture may reach 170-180℃, and the mixing time is extended from 30-45 seconds to 60-90 seconds.

[0026] The device also includes a frame 1 and a conveying mechanism 13. A mixing bin 2 is installed above the interior of the frame 1. The bottom cross-section of the mixing bin 2 is semicircular, and the top of the mixing bin 2 is open so that feeding can be carried out through the top opening. A bin door 201 is hinged on the top of the mixing bin 2. Closing the bin door 201 during mixing can keep the mixing bin 2 warm. A driving unit 3 is fixed on one side of the frame 1. The driving unit 3 is composed of a reduction motor. A rotating shaft 301 is installed on the output end of the driving unit 3. The rotating shaft 301 rotates through the mixing bin 2. A plurality of mixing plates 4 are evenly arranged on the surface of the rotating shaft 301. The mixing plates 4 are placed inside the mixing bin 2. The rotating shaft 301 coincides with the center of the semicircle at the bottom of the mixing bin 2. A discharge hole is opened at the center of the bottom of the mixing bin 2. A discharge bin 8 is provided, and the discharge bin 8 corresponds to the discharge hole at the bottom of the mixing bin 2. A sealing slide 801 is slidably installed inside the discharge bin 8, and the sealing slide 801 can seal the discharge hole. A control cylinder 804 is provided on one side of the discharge bin 8, and the output end of the control cylinder 804 is installed on the sealing slide 801 to control whether to discharge and the discharge speed by the control cylinder 804. A shaking plate 9 is hinged on the rear side of the discharge bin 8, and the front end of the shaking plate 9 is tilted downward. The shaking plate 9 is placed under the sealing slide 801. The asphalt material falling from the discharge port will first fall onto the shaking plate 9, and the asphalt will be shaken off by the vibrating shaking plate 9. The conveying mechanism 13 is placed on one side of the inner part of the frame 1, and the conveying mechanism 13 is placed directly below the shaking plate 9.

[0027] Please refer to Figure 1 and Figure 2 As shown, cross beams 101 are symmetrically arranged on both sides of the frame 1, and a transmission shaft 6 is rotatably installed between the two cross beams 101. The transmission shaft 6 is arranged parallel to the rotating shaft 301, and the transmission shaft 6 is placed on the rear side of the shaking plate 9. An eccentric wheel 602 is arranged on the surface of the transmission shaft 6, and a protrusion 901 is arranged at the back center of the shaking plate 9 to increase the thickness and thus increase the service life. The protrusion 901 is in contact with the eccentric wheel 602, and the rotation of the eccentric wheel 602 drives the shaking plate 9 to shake within a certain range.

[0028] Please refer to Figure 1 As shown, a driving pulley 5 is provided at one end of the rotating shaft 301 away from the driving unit 3, and the driving pulley 5 is placed on the outside of the mixing bin 2. A driven pulley 601 is provided at one end of the transmission shaft 6. The driven pulley 601 is on the same side as the driving pulley 5. A belt 7 is provided between the driven pulley 601 and the driving pulley 5. The driving pulley 5 is of large size, while the driven pulley 601 is of small size, so that when the rotating shaft 301 rotates slowly, the transmission shaft 6 can be driven to rotate at high speed to increase the vibration frequency of the shaking plate 9.

[0029] Please refer to Figure 2 and Figure 3As shown, a lower extension plate 802 is provided at the bottom of the rear side of the discharge bin 8, and a slide groove 803 is provided on the surface of the lower extension plate 802. A connecting rod 10 is hinged on the back of the shaking plate 9, and the connecting rod 10 passes through the slide groove 803. When the shaking plate 9 is shaken, the connecting rod 10 can rotate so that the connecting rod 10 slides inside the slide groove 803. An adjusting nut 11 is screwed on the surface of the connecting rod 10, and the adjusting nut 11 is placed on the rear side of the lower extension plate 802. A spring 12 is provided on the surface of the connecting rod 10, and the spring 12 is placed between the lower extension plate 802 and the adjusting nut 11. The elastic force of the spring 12 is used to make the connecting rod 10 always have a backward force, so that the raised portion 901 on the back of the shaking plate 9 always keeps in contact with the eccentric wheel 602.

[0030] Working principle: First, open the door 201 to open the top of the mixing bin 2, then pour the recycled asphalt to be mixed into the mixing plate 4, and drive the shaft 301 to rotate through the driving unit 3, and then stir the asphalt inside through the mixing plate 4. During the mixing process, the bottom discharge door is always kept closed, and the active pulley 5 rotates. At this time, the eccentric wheel 602 is driven to rotate by the cooperation of the belt 7 and the driven pulley 601. Due to the presence of the spring 12, the adjusting nut 11 always has a backward force, which then pulls the shaking wheel. The material plate 9 always has a backward rotational force, so that the protrusion 901 fits tightly with the eccentric wheel 602. During operation, the rotation of the transmission shaft 6 can drive the shaking plate 9 to swing around its installation axis to a certain extent. After the mixing is completed, the sealing slide 801 is controlled to move by the control cylinder 804, so that the asphalt inside the mixing bin 2 can be discharged downward through the discharge bin 8. The discharged asphalt will fall onto the shaking plate 9, and the asphalt will be vibrated and dispersed by the shaking of the shaking plate 9, so that the asphalt can fall evenly onto the conveying mechanism 13 to prevent it from agglomerating and solidifying.

[0031] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A high RAP content room temperature recycled asphalt mixture mixing device, comprising a frame (1) and a conveying mechanism (13), characterized in that: A mixing bin (2) is installed above the interior of the frame (1), the top of the mixing bin (2) is open, and a bin door (201) is hinged on the top of the mixing bin (2). A driving unit (3) is fixed on one side of the frame (1), and a rotating shaft (301) is installed on the output end of the driving unit (3). The rotating shaft (301) rotates and passes through the mixing bin (2). A plurality of mixing plates (4) are evenly arranged on the surface of the rotating shaft (301), and the mixing plates (4) are placed inside the mixing bin (2). A discharge hole is opened at the bottom of the mixing bin (2), and a discharge bin (8) is arranged on the lower surface of the mixing bin (2). The discharge bin (8) corresponds to the discharge hole at the bottom of the mixing bin (2), a sealing slide plate (801) is slidably installed inside the discharge bin (8), a control cylinder (804) is provided on one side of the discharge bin (8), and the output end of the control cylinder (804) is installed on the sealing slide plate (801), a shaking plate (9) is hinged on the rear side of the discharge bin (8), the front end of the shaking plate (9) is tilted downward, and the shaking plate (9) is placed below the sealing slide plate (801), the conveying mechanism (13) is placed on one side of the interior of the frame (1), and the conveying mechanism (13) is placed directly below the shaking plate (9).

2. The high RAP content room temperature recycled asphalt mixture mixing device according to claim 1, characterized in that: Crossbeams (101) are symmetrically arranged on both sides of the frame (1), a transmission shaft (6) is rotatably installed between the two crossbeams (101), the transmission shaft (6) is arranged parallel to the rotating shaft (301), the transmission shaft (6) is placed on the rear side of the shaking plate (9), and an eccentric wheel (602) is arranged on the surface of the transmission shaft (6).

3. The high RAP content room temperature recycled asphalt mixture mixing device according to claim 2, characterized in that: A raised portion (901) is provided at the back center of the shaking plate (9), and the raised portion (901) is in contact with the eccentric wheel (602).

4. The high RAP content room temperature recycled asphalt mixture mixing device according to claim 3, characterized in that: A driving pulley (5) is provided at one end of the rotating shaft (301) facing away from the driving unit (3), and the driving pulley (5) is placed outside the mixing chamber (2). A driven pulley (601) is provided at one end of the transmission shaft (6), and the driven pulley (601) is on the same side as the driving pulley (5). A belt (7) is sleeved between the driven pulley (601) and the driving pulley (5).

5. The high RAP content room temperature recycled asphalt mixture mixing device according to claim 1, characterized in that: A lower extension plate (802) is provided at the rear bottom of the discharge bin (8), a slide groove (803) is provided on the surface of the lower extension plate (802), and a connecting rod (10) is hinged on the back of the shaking plate (9), and the connecting rod (10) passes through the slide groove (803).

6. The high RAP content room temperature recycled asphalt mixture mixing device according to claim 5, characterized in that: An adjusting nut (11) is screwed onto the surface of the connecting rod (10), and the adjusting nut (11) is placed on the rear side of the lower extension plate (802). A spring (12) is sleeved on the surface of the connecting rod (10), and the spring (12) is placed between the lower extension plate (802) and the adjusting nut (11).

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