An apparatus for mixing recycled asphalt mix

Abstract

The application provides a kind of mixing equipment of recycled asphalt mixture, belong to recycled asphalt mixture production technical field, including support and fixedly connected with the stirring cylinder in support inside;The bottom of the stirring cylinder is provided with discharge port, the front and rear side wall of the stirring cylinder is provided with driving mechanism, corresponding driving mechanism between front and back is equipped with the arc baffle that is adapted to discharge port, driving mechanism is used to drive arc baffle vertical movement after along the inner arc surface axis of stirring cylinder rotation opens discharge port, when the arc baffle closes, it is matched with the inner arc surface of stirring cylinder and forms smooth surface, the outer arc surface of the stirring cylinder is fixedly provided with auxiliary discharger, for when arc baffle opens, auxiliary material discharge on the surface of arc baffle, the left and right sides of discharge port are provided with connecting shaft, the outer arc surface of the connecting shaft is rotatably connected with link strip;The application can solve the problem that the surface of arc baffle is not completely discharged and affects the quality of recycled asphalt mixture.

Description

Technical Field

[0001] This application relates to the field of recycled asphalt mixture production technology, specifically to a mixing device for recycled asphalt mixture. Background Technology

[0002] In the field of road engineering, the application of recycled asphalt mixtures is becoming increasingly widespread. It effectively utilizes waste asphalt pavement materials, achieving resource recycling and reducing project costs. Recycled asphalt mixture mixing equipment is key equipment for realizing the recycling of waste asphalt pavement materials. Its core function is to uniformly mix the recovered old asphalt mixture with new aggregates, asphalt, and other components to meet the performance requirements of road construction. In the mixing equipment, the unloading control structure of the mixing cylinder directly affects the unloading efficiency and quality stability of the mixture.

[0003] Referring to Chinese patent application document CN118996954A, published on November 22, 2024, entitled "An Asphalt Mixing Device for Public Road Construction", it includes a bottom trough plate, a cylinder rotatably mounted on the bottom of the bottom trough plate, and arc-shaped baffles rotatably mounted on the opposite sides of the bottom trough plate. The push rod of the cylinder is hinged to the arc-shaped baffles. When the cylinder works, it drives the arc-shaped baffles to rotate, opening the discharge port for unloading.

[0004] Referring to the above technical solution, when the curved baffle opens for unloading, the viscosity of the asphalt mixture increases significantly due to the temperature drop during unloading. This makes it difficult for the asphalt mixture to completely detach from the baffle, leaving some material residue on the inner curved surface. Incomplete unloading means that this residue will re-enter the mixing tank during the next mixing operation. During the high-temperature mixing again in the tank, the difference in state and heating between the residual material and the virgin material easily leads to uneven heating. This causes the residual asphalt mixture to age due to overheating or uneven heating, reducing the performance stability of the recycled asphalt mixture and affecting the service life and performance of road engineering projects. Summary of the Invention

[0005] In view of this, this application provides a mixing device for recycled asphalt mixture, which aims to solve the problem that incomplete unloading on the surface of the arc baffle affects the quality of recycled asphalt mixture.

[0006] To solve the above-mentioned technical problems, this application provides a mixing device for recycled asphalt mixture, including a support frame and a mixing cylinder fixedly connected inside the support frame; the bottom of the mixing cylinder is provided with a discharge port, and the front and rear side walls of the mixing cylinder are provided with driving mechanisms. An arc-shaped baffle adapted to the discharge port is provided between the front and rear corresponding driving mechanisms. The driving mechanism is used to drive the arc-shaped baffle to move vertically and then rotate along the inner arc surface axis of the mixing cylinder to open the discharge port. When the arc-shaped baffle is closed, it cooperates with the inner arc surface of the mixing cylinder to form a smooth curved surface. An auxiliary unloader is fixedly provided on the outer arc surface of the mixing cylinder to assist in unloading the material on the surface of the arc-shaped baffle when the arc-shaped baffle is open.

[0007] By adopting the above technical solution, the arc-shaped baffle, when closed, forms a smooth curved surface with the inner arc surface of the mixing cylinder, effectively avoiding the formation of a "mixing blind zone" due to pits at the connection point, thus improving the uniformity of material mixing. During unloading, the drive mechanism first moves the arc-shaped baffle vertically to below the auxiliary unloader, and then rotates it along the inner arc surface axis of the mixing cylinder to open the unloading port. During this process, the auxiliary unloader simultaneously scrapes off the material on the surface of the arc-shaped baffle, assisting in completing the unloading operation and preventing the material on the inner wall of the arc-shaped baffle from re-entering the mixing cylinder as the arc-shaped baffle closes. This prevents the material from being overheated and stirred, leading to aging and reducing the impact on the quality of subsequent material processing. It also prevents the surface of the arc-shaped baffle from being affected by material residue, thus ensuring a tight seal when closed. Furthermore, the auxiliary unloading process is carried out simultaneously with the opening process of the arc-shaped baffle, eliminating the need for separate operation after the mixing cylinder unloading is completed, thereby improving the equipment's working efficiency.

[0008] Optionally, connecting shafts are provided on both the left and right sides of the discharge port, and connecting strips are rotatably connected to the outer arc surface of the connecting shafts. A torsion spring is provided between the connecting shaft and the inner wall of the connecting strip. When the arc-shaped baffle is closed, it cooperates with the surface of the connecting strip facing the inside of the mixing tank to form a smooth curved surface. The left and right sides of the arc-shaped baffle are arranged in a figure-eight shape.

[0009] By adopting the above technical solution, during the downward movement of the arc-shaped baffle, the connecting strip rotates under the torque of the torsion spring, causing the lower surface of the connecting strip to rotate to an inclined state. This prevents material from adhering to the lower surface of the connecting strip during unloading, thus affecting the sealing performance when the arc-shaped baffle closes. The left and right sides of the arc-shaped baffle are arranged in a relatively "V" shape, which can increase the contact area with the lower surface of the connecting strip, improve the support strength, and facilitate the unloading device to unload material from both sides of the arc-shaped baffle.

[0010] Optionally, thickened portions are provided on both the left and right sides of the discharge port, and the connecting shaft is disposed inside the thickened portions.

[0011] By adopting the above technical solution, the structural strength of the discharge port edge is improved, avoiding deformation caused by long-term material impact that could affect sealing performance. At the same time, it facilitates the assembly of connecting shafts, connecting strips, and torsion springs.

[0012] Optionally, limit block one is provided at both ends of the connecting shaft, and limit block two is provided inside the connecting strip. When the torsion spring is in its natural state, limit block two and limit block one abut against each other.

[0013] By adopting the above technical solution, the limiting block one and the limiting block two work together to limit the rotation angle of the connecting strip, so that when the arc baffle moves vertically upward, it can contact the connecting strip and drive the connecting strip to rotate in the opposite direction.

[0014] Optionally, the auxiliary unloader includes a support plate and a scraper. An extension plate 1 is provided in the middle of the support plate, and an extension plate 2 is provided in the middle of the scraper. T-pins are evenly provided on the upper surface of the extension plate 2. The T-pins are slidably connected to the inner wall of the corresponding sliding holes in the extension plate 1. A spring is sleeved on the lower end of each T-pin. The springs are located between the extension plate 1 and the extension plate 2.

[0015] By adopting the above technical solution, during the rotation of the arc-shaped baffle, the scraper blocks the material on the inner wall of the arc-shaped baffle, so that the material on the inner wall of the arc-shaped baffle can also be discharged, avoiding the material on the inner wall of the arc-shaped baffle from re-entering the mixing tank and being over-mixed and aged. At the same time, the scraper is elastically installed, which makes it easy to scrape the material on the left and right sides of the arc-shaped baffle, and avoids affecting the sealing performance when the arc-shaped baffle is closed.

[0016] Optionally, the lower end of the scraper near the arc-shaped baffle has an arc-shaped structure.

[0017] By adopting the above technical solution, the material is guided, allowing it to separate from the lower end of the scraper in a timely manner under the guidance of the arc-shaped structure, thus reducing residue.

[0018] Optionally, the driving mechanism includes a first hydraulic cylinder, a gear ring, and a support rod. The first hydraulic cylinder is fixedly installed on the front and rear side walls of the mixing cylinder. The upper end of the push rod of the first hydraulic cylinder is fixedly provided with a rack frame. The gear ring is rotatably connected to the front and rear side walls of the mixing cylinder. The lower end of the gear ring is fixedly provided with a strip plate. The middle part of the strip plate is fixedly provided with a second hydraulic cylinder. The support rod is fixedly connected to the lower end of the arc-shaped baffle. The lower end of the push rod of the second hydraulic cylinder is fixedly connected to the support rod. The rack frame is meshed with the adjacent gear ring.

[0019] By adopting the above technical solution, the arc-shaped baffle is driven to move vertically and then rotates along the inner arc surface axis of the mixing cylinder to open the discharge port. The auxiliary unloader is used to assist in unloading the material from the surface of the arc-shaped baffle when it is opened.

[0020] Optionally, the lower end of each strip plate is provided with a strip-shaped opening for the sliding of the support rod.

[0021] By adopting the above technical solution, the strip plate supports the support rod through the strip opening, reducing the radial force on the second push rod of the hydraulic cylinder and extending its service life.

[0022] Optionally, the front and rear side walls of the mixing tank are provided with I-shaped limiting blocks, and the vertical part of the rack frame is slidably connected to the inside of the I-shaped limiting block on the same side.

[0023] By adopting the above technical solution, the rack frame is limited in the front and rear directions, reducing the offset of the rack frame.

[0024] Optionally, an agitator is rotatably connected inside the mixing tank, and one end of the agitator is fixedly connected to the output shaft of the drive motor via a coupling.

[0025] By adopting the above technical solution, the mixing paddle is driven to mix the recycled asphalt mixture in the mixing tank.

[0026] In summary, compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0027] 1. During unloading, the drive mechanism first moves the arc-shaped baffle vertically to below the auxiliary unloader, and then rotates it along the inner arc surface axis of the mixing cylinder to open the unloading port. During this process, the auxiliary unloader simultaneously scrapes off the material on the surface of the arc-shaped baffle, assisting in the unloading operation and preventing the material on the inner wall of the arc-shaped baffle from re-entering the mixing cylinder as the arc-shaped baffle closes. This prevents the material from being overheated and stirred, leading to aging and reducing the impact on the quality of subsequent material processing. It also prevents the surface of the arc-shaped baffle from being affected by material residue, thus ensuring a tight seal when closed. In addition, the auxiliary unloading process is carried out simultaneously with the opening process of the arc-shaped baffle, eliminating the need for separate operation after the mixing cylinder is unloaded, thereby improving the equipment's working efficiency.

[0028] 2. The left and right sides of the arc-shaped baffle are arranged in a figure-eight shape. Under the action of the spring, the lower end of the scraper can abut against the inner arc surface and the left and right sides of the arc-shaped baffle to block and scrape off the material on the surface of the arc-shaped baffle, so as to avoid excessive residue of recycled asphalt mixture affecting the processing quality of subsequent mixtures, and at the same time prevent the arc-shaped baffle from not sealing properly when closed.

[0029] 3. The bottom of the mixing tank is equipped with a discharge port, and the two ends of the discharge port extend to the front and rear inner walls of the mixing tank respectively. This improves the discharge efficiency during the discharge process while reducing the residue of recycled asphalt mixture inside the mixing tank. Attached Figure Description

[0030] Figure 1This is a schematic diagram of the structure of a mixing device for recycled asphalt mixture according to this application;

[0031] Figure 2 This is a rear cross-sectional view of the mixing tank of this application.

[0032] Figure 3 For this application Figure 2 Schematic diagram of the structure of region A in the middle;

[0033] Figure 4 For this application Figure 3 Schematic diagram of the structure of region B in the middle;

[0034] Figure 5 This is a schematic diagram of the right side structure of the mixing tank of this application;

[0035] Figure 6 This is a schematic diagram of the drive mechanism of this application;

[0036] Figure 7 This is a structural schematic diagram of the connecting shaft and the limiting block 1 in this application;

[0037] Figure 8 This is a schematic diagram of the arc-shaped baffle in the open state of this application;

[0038] Figure 9 For this application Figure 8 A magnified structural diagram of region C in the middle.

[0039] Explanation of reference numerals in the attached drawings: 1. Bracket; 2. Mixing cylinder; 21. Discharge port; 22. Thickened part; 23. Connecting shaft; 231. Limiting block one; 24. Connecting strip; 241. Limiting block two; 25. Torsion spring; 26. Arc-shaped baffle; 27. Mixing paddle; 28. Drive motor; 3. Auxiliary unloader; 31. Support plate; 311. Extension plate one; 32. Scraper; 321. Extension plate two; 33. T-pin; 34. Spring; 4. Drive mechanism; 41. Hydraulic cylinder one; 42. Rack frame; 43. Gear ring; 44. Strip plate; 441. Strip opening; 45. Hydraulic cylinder two; 46. Support rod; 5. I-shaped limiting block. Detailed Implementation

[0040] The following will be described in conjunction with embodiments of this application. Figures 1-9 The technical solutions of the embodiments of this application are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of this application are within the scope of protection of this application.

[0041] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6This embodiment provides a mixing device for recycled asphalt mixture, including a support 1, a mixing cylinder 2, an arc-shaped baffle 26, a drive mechanism 4, and an auxiliary unloader 3. The mixing cylinder 2 is fixedly connected inside the support 1. The drive mechanism 4 is used to drive the arc-shaped baffle 26 to move vertically and then rotate along the inner arc surface axis of the mixing cylinder 2 to open the discharge port 21. The auxiliary unloader 3 is used to assist in unloading the material on the surface of the arc-shaped baffle 26 when the arc-shaped baffle 26 is opened.

[0042] Reference Figure 1 and Figure 2 A mixing paddle 27 is rotatably connected between the front and rear side walls of the mixing cylinder 2. The front end of the mixing paddle 27 is fixedly connected to the output shaft of the drive motor 28 via a coupling (the drive motor 28 drives the mixing paddle 27 to mix the recycled asphalt mixture inside the mixing cylinder 2, which is existing technology and will not be described in detail here). The lower end of the mixing cylinder 2 is an arc surface, and a discharge port 21 is provided at the bottom of the mixing cylinder 2. The two ends of the discharge port 21 extend to the front and rear inner walls of the mixing cylinder 2, respectively, to reduce the residue of recycled asphalt mixture inside the mixing cylinder 2 during the discharge process.

[0043] Reference Figure 5 and Figure 6 The drive mechanism 4 includes a first hydraulic cylinder 41, a rack frame 42, a gear ring 43, a strip plate 44, a second hydraulic cylinder 45, and a support rod 46. The first hydraulic cylinder 41 is fixedly installed on the front and rear side walls of the mixing cylinder 2. The upper end of the push rod of the first hydraulic cylinder 41 is fixedly installed with a rack frame 42. The gear ring 43 is rotatably connected to the outer arc surface of the support flange provided on the front and rear side walls of the mixing cylinder 2 through bearings. The rotating shaft of the mixing paddle 27 is rotatably connected to the inner arc surface of the support flange through a bushing. The lower end of the gear ring 43 is fixedly installed with a strip plate 44. The second hydraulic cylinder 45 is fixedly installed in the middle of the strip plate 44. The support rod 46 is fixedly connected to the lower end of the outer arc surface of the arc baffle 26 through a connecting column. The lower end of the push rod of the second hydraulic cylinder 45 is fixedly connected to the support rod 46. The end of the support rod 46 is fixedly connected to drive the arc-shaped baffle 26 to move vertically. The end of the support rod 46 is slidably connected to the slot 441 opened at the lower end of the adjacent strip plate 44. The strip plate 44 supports the support rod 46 through the slot 441, reducing the radial force on the push rod of the second cylinder 45. The rack frame 42 is meshed with the adjacent gear ring 43 to drive the arc-shaped baffle 26 to rotate along the inner arc surface axis of the mixing cylinder 2. I-shaped limiting blocks 5 are provided on the front and rear side walls of the mixing cylinder 2. The vertical part of the rack frame 42 is slidably connected to the inside of the I-shaped limiting block 5 on the same side. The I-shaped limiting block 5 is used to limit the rack frame 42 in the front and rear directions, reducing the offset of the rack frame 42.

[0044] After the recycled asphalt mixture is mixed, the push rod of the second hydraulic cylinder 45 extends, pushing the support rod 46 downward. This, in turn, drives the arc-shaped baffle 26 downward to below the auxiliary unloader 3 via the connecting column. Then, the push rod of the first hydraulic cylinder 41 retracts, driving the rack frame 42 downward. As the rack frame 42 moves downward, it meshes with the gear ring 43, causing the strip plate 44 to rotate in a set direction. The strip plate 44 drives the support rod 46 and the arc-shaped baffle 26 to rotate along the inner arc surface axis of the mixing cylinder 2 through the strip-shaped opening 441, opening the discharge port 21 for unloading. During the rotation of the arc-shaped baffle 26, the auxiliary unloader 3 blocks the material on the inner arc surface of the arc-shaped baffle 26, assisting in unloading and preventing the material on the inner wall of the arc-shaped baffle 26 from re-entering the mixing cylinder 2 for secondary mixing. This prevents the recycled asphalt mixture from being overheated and mixed, leading to aging and affecting the mixing quality of subsequent materials.

[0045] Reference Figure 2 and Figure 3 The auxiliary unloader 3 includes a support plate 31 and a scraper 32. The support plate 31 is provided with an extension plate 311 in the middle, and the scraper 32 is provided with an extension plate 321 in the middle. T-pins 33 are evenly provided on the upper surface of the extension plate 321. The T-pins 33 are slidably connected to the inner wall of the corresponding sliding hole in the extension plate 311. The lower end of the T-pins 33 is fitted with a spring 34. The springs 34 are located between the extension plate 311 and the extension plate 321. The lower end of the scraper 32 is arc-shaped on the side near the arc-shaped baffle 26.

[0046] Hydraulic cylinder 45 drives the arc-shaped baffle 26 to move below the scraper 32 via support rod 46. During the rotation of the arc-shaped baffle 26 driven by hydraulic cylinder 41, the scraper 32 blocks the material on the inner wall of the arc-shaped baffle 26, allowing the material on the inner wall of the arc-shaped baffle 26 to be discharged, reducing residue. Moreover, the lower end of the scraper 32 near the arc-shaped baffle 26 has an arc-shaped structure, which can play a guiding role, allowing the material to separate from the lower end of the scraper 32 in time under the guidance of the arc-shaped structure, reducing residue.

[0047] Reference Figure 2 , Figure 3 and Figure 4Thickened sections 22 are provided on both the left and right sides of the discharge port 21. Connecting shafts 23 are installed inside each thickened section 22. Connecting strips 24 are rotatably connected to the outer arc surface of each connecting shaft 23. Torsion springs 25 are provided between the inner walls of the connecting shaft 23 and the connecting strips 24. When the arc-shaped baffle 26 is closed, its left and right inclined surfaces abut against the lower surfaces of the corresponding vertical connecting strips 24. At this time, the inner walls of the mixing cylinder 2, connecting strips 24, and arc-shaped baffle 26 cooperate to form a smooth curved surface, preventing the formation of a "mixing blind zone" inside the mixing cylinder 2 and affecting the uniformity of the mixture. The left and right sides of the arc-shaped baffle 26 are arranged in a relatively opposite "V" shape, which can improve... The increased contact area between the connecting strip 24 and the lower surface of the connecting strip 24 improves the support strength and facilitates unloading from both sides of the arc-shaped baffle 26. The thickened portion 22 enhances the structural strength of the unloading port 21 edge, preventing deformation caused by prolonged material impact and thus maintaining sealing performance. It also facilitates the assembly of the connecting shaft 23, connecting strip 24, and torsion spring 25. As the arc-shaped baffle 26 moves downward, the connecting strip 24 rotates under the torque of the torsion spring 25, causing the lower surface of the connecting strip 24 to tilt, preventing material from adhering to the lower surface of the connecting strip 24 during unloading. Limit blocks 231 are provided at both ends of the connecting shaft 23 (refer to...). Figure 7 The connecting strip 24 is equipped with a second limiting block 241 inside. When the torsion spring 25 is in its natural state (the arc-shaped baffle 26 is open and separated from the connecting strip 24, and the connecting strip 24 is not subjected to the thrust of the arc-shaped baffle 26), the second limiting block 241 and the first limiting block 231 abut (refer to...). Figure 8 and Figure 9 ( ), used to limit the rotation angle of the connecting bar 24, so that when the arc-shaped baffle 26 moves vertically upward, it can contact the connecting bar 24 and drive the connecting bar 24 to rotate in the opposite direction.

[0048] During the rotation of the arc-shaped baffle 26 driven by the hydraulic cylinder 41, due to the opposing "V"-shaped arrangement of the left and right sides of the arc-shaped baffle 26, the extension plate 311 applies a downward force to the extension plate 321 via the spring 34, causing the lower end of the scraper 32 to abut against the inclined surface of the adjacent side of the arc-shaped baffle 26, blocking and scraping away the material on the inclined surface of the arc-shaped baffle 26. As the arc-shaped baffle 26 continues to rotate, the scraper 32 is pushed upward by the inclined surface of the arc-shaped baffle 26 and abuts against the inner arc surface of the arc-shaped baffle 26, blocking the material on the inner arc surface of the arc-shaped baffle 26, causing the material on the inner arc surface of the arc-shaped baffle 26 to be discharged from the other side. As the arc-shaped baffle 26 continues to rotate, the scraper 32 completely scrapes away the material on the other side of the arc-shaped baffle 26, ensuring that the arc-shaped baffle 26... The sealing performance during closure prevents residual recycled asphalt mixture from causing seal failure, which could lead to leakage or overflow of liquid materials (such as molten asphalt) in the mixture during mixing, thereby compromising the proportioning accuracy of the recycled asphalt mixture and reducing processing quality. After unloading, the push rod of cylinder 2 45 is first extended a second time to completely separate the arc-shaped baffle 26 from the scraper 32. Then, cylinder 1 41 is rotated in the opposite direction until the arc-shaped baffle 26 corresponds to the vertical position of the unloading port 21. Cylinder 2 45 is then operated in the opposite direction, and the push rod of cylinder 2 45 retracts, causing the arc-shaped baffle 26 to move upward. During the upward movement of the arc-shaped baffle 26, it abuts against the edge of the connecting strip 24 and pushes the connecting strip 24 to rotate in the opposite direction until the inner wall surfaces of the mixing cylinder 2, the connecting strip 24, and the arc-shaped baffle 26 cooperate to form a smooth curved surface.

[0049] The implementation principle of a mixing device for recycled asphalt mixture in this application embodiment is as follows:

[0050] The recycled asphalt raw material is poured into the mixing tank 2 through the feed port. The drive motor 28 is started, and the drive motor 28 drives the mixing paddle 27 to mix the recycled asphalt mixture. After the mixing is completed, the push rod of the second hydraulic cylinder 45 is extended. The push rod of the second hydraulic cylinder 45 pushes the support rod 46 to move down, and then drives the arc-shaped baffle 26 to move down to the bottom of the auxiliary unloader 3 through the connecting column. The connecting strip 24, which loses the limiting support of the arc-shaped baffle 26, rotates along the axis of the connecting shaft 23 under the torque of the torsion spring 25. The lower surface of the connecting strip 24 rotates to an inclined state to prevent material from adhering to the lower surface of the connecting strip 24 during unloading. Then, the push rod of the first hydraulic cylinder 41 is retracted to drive the rack frame 42 to move down. The rack frame 42 drives the strip plate 44 to rotate through the meshing with the gear ring 43. The strip plate 44 drives the support rod 46 and the arc-shaped baffle 26 to rotate along the inner arc surface axis of the mixing tank 2 through the strip-shaped opening 441, opening the unloading port 21 for unloading.

[0051] Extension plate 311 applies a downward force to extension plate 321 via spring 34. During the rotation of arc-shaped baffle 26 driven by cylinder 41, the lower end of scraper 32 abuts against the inclined surface of the adjacent side of arc-shaped baffle 26, blocking and scraping away the material on the inclined surface of arc-shaped baffle 26. As arc-shaped baffle 26 continues to rotate, scraper 32 is pushed upward by the inclined surface of arc-shaped baffle 26 and abuts against the inner arc surface of arc-shaped baffle 26, blocking the material on the inner arc surface of arc-shaped baffle 26, allowing the material on the inner arc surface of arc-shaped baffle 26 to be discharged from the other side. As arc-shaped baffle 26 continues to rotate, scraper 32 completely scrapes away the material on the other side of arc-shaped baffle 26, preventing residual recycled asphalt mixture from affecting the sealing performance of arc-shaped baffle 26 when it is closed.

[0052] After unloading, first control the push rod of the second hydraulic cylinder 45 to extend it a second time, so that the arc-shaped baffle 26 is completely separated from the scraper 32, preventing the material remaining on the scraper 32 from adhering to the arc-shaped baffle 26 again. Then control the first hydraulic cylinder 41 to rotate in the opposite direction until the arc-shaped baffle 26 corresponds to the vertical position of the unloading port 21. Control the second hydraulic cylinder 45 to work in the opposite direction. The push rod of the second hydraulic cylinder 45 retracts, driving the arc-shaped baffle 26 to move upward. During the upward movement of the arc-shaped baffle 26, it abuts against the edge of the connecting strip 24 and pushes the connecting strip 24 to rotate in the opposite direction until the inner wall surfaces of the mixing cylinder 2, the connecting strip 24 and the arc-shaped baffle 26 cooperate to form a smooth curved surface.

[0053] Furthermore, in the description of this application, the terms "installation", "connection", "linking", and "setting" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

Claims

1. A mixing device for recycling asphalt mixture, comprising a support (1) and a mixing cylinder (2) fixedly connected to the inside of the support (1), characterized in that: the bottom of the mixing cylinder (2) is provided with a discharge port (21), the front and rear sidewalls of the mixing cylinder (2) are each provided with a driving mechanism (4), the corresponding driving mechanisms (4) on the front and rear sides are provided with an arc-shaped baffle (26) matched with the discharge port (21), the driving mechanism (4) is used for driving the arc-shaped baffle (26) to move vertically and then rotate along the inner arc surface axis of the mixing cylinder (2) to open the discharge port (21), the arc-shaped baffle (26) cooperates with the inner arc surface of the mixing cylinder (2) to form a smooth curved surface when the arc-shaped baffle (26) is closed, and the outer arc surface of the mixing cylinder (2) is fixedly provided with an auxiliary discharger (3) for assisting the discharge of materials on the surface of the arc-shaped baffle (26) when the arc-shaped baffle (26) is opened; the left and right sides of the discharge port (21) are each provided with a connecting shaft (23), the outer arc surface of the connecting shaft (23) is rotatably connected with a link strip (24), and the inner walls of the connecting shaft (23) and the link strip (24) are provided with a torsional spring (25), the surface of the link strip (24) facing the inside of the mixing cylinder (2) cooperates with the arc-shaped baffle (26) to form a smooth curved surface when the arc-shaped baffle (26) is closed, and the left and right sides of the arc-shaped baffle (26) are arranged in opposite "8" shapes.

2. A plant for the production of recycled asphalt mixtures according to claim 1, characterized in that: The left and right sides of the discharge port (21) are each provided with a thickened portion (22), and the connecting shaft (23) is arranged in the inside of the thickened portion (22).

3. A plant for the production of recycled asphalt mixtures according to claim 2, characterized in that: The two ends of the connecting shaft (23) are each provided with a limiting block one (231), the inside of the link strip (24) is provided with a limiting block two (241), and the limiting block two (241) and the limiting block one (231) abut when the torsional spring (25) is in a natural state.

4. A plant for the production of recycled asphalt mixtures according to claim 3, characterized in that: The auxiliary discharger (3) comprises a support plate (31) and a scraper (32), the middle part of the support plate (31) is provided with an extension plate one (311), the middle part of the scraper (32) is provided with an extension plate two (321), the upper surface of the extension plate two (321) is uniformly provided with a T-shaped pin (33), the T-shaped pin (33) is respectively and slidably connected with the inner wall of a sliding hole correspondingly arranged in the extension plate one (311), the lower end of the T-shaped pin (33) is sleeved with a spring (34), and the spring (34) is located between the extension plate one (311) and the extension plate two (321).

5. A plant for the production of recycled asphalt mixtures according to claim 4, characterized in that: The side of the lower end of the scraper (32) close to the arc-shaped baffle (26) is in an arc-shaped structure.

6. A plant for the production of recycled asphalt mixtures according to any one of claims 1-5, characterized in that: The driving mechanism (4) comprises an oil cylinder (41), a gear ring (43) and a support rod (46), the oil cylinder (41) is fixedly arranged on the front and rear side walls of the stirring cylinder (2) respectively, the push rod one upper end of the oil cylinder (41) is fixedly provided with a rack frame (42), the gear ring (43) is rotatably connected to the front and rear side walls of the stirring cylinder (2) respectively, the lower end of the gear ring (43) is fixedly provided with a strip-shaped plate (44), the middle part of the strip-shaped plate (44) is fixedly provided with an oil cylinder (45), the support rod (46) is fixedly connected with the lower end of the arc-shaped baffle (26), the lower end of the push rod two of the oil cylinder (45) is fixedly connected with the support rod (46), and the rack frame (42) is meshingly connected with the adjacent gear ring (43) respectively.

7. A plant for the production of recycled asphalt mixtures according to claim 6, characterized in that: The lower end of the strip-shaped plate (44) is provided with a strip-shaped opening (441) for sliding of the support rod (46).

8. A plant for the production of recycled asphalt mixtures according to claim 6, characterized in that: The front and rear side walls of the stirring cylinder (2) are provided with I-shaped limiting blocks (5), and the vertical parts of the rack frames (42) are slidably connected with the I-shaped limiting blocks (5) on the same side.

9. A plant for the production of recycled asphalt mixtures according to claim 1, characterized in that: The stirring cylinder (2) is rotatably connected with a stirring paddle (27) in the inside, and one end of the stirring paddle (27) is fixedly connected with the output shaft of a driving motor (28) through a shaft coupling.

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