A device for recycling asphalt in waste asphalt mixture

Abstract

The application discloses a kind of waste asphalt mixture in asphalt recovery device, it is related to material recycling technical field, including feed bin, the lower end of the feed bin multiple discharge ports are all communicated with conveying bin, the front end of multiple conveying bin is communicated with the crushing bin, further including crushing mechanism, the crushing mechanism is set to the inside of crushing bin, the crushing mechanism includes two crushing rollers rotationally connected in the inside of crushing bin, the left side of the crushing bin is fixedly connected with second motor, the left end of two crushing rollers is fixedly connected with driving gear and driven gear respectively, the driving gear and driven gear are engaged with each other, the output shaft of the second motor is fixedly connected with the shaft center of driving gear, the radius of the driving gear is less than the radius of driven gear, to solve the problem that the plasticity of old asphalt leads to a high probability of material crushing failure and affects the quality of subsequent separation processing.

Description

Technical Field

[0001] This invention relates to the field of material recycling technology, and more specifically, to a device for recycling asphalt from waste asphalt mixtures. Background Technology

[0002] The waste asphalt mixture asphalt recycling device is used to process waste asphalt mixtures to separate and recycle the old asphalt, thereby realizing the recycling of asphalt resources. It mainly uses thermochemical dissolution, physical separation and other methods to separate asphalt from aggregates, extract and purify asphalt, and finally transform it into reusable recycled asphalt binder, providing recycled asphalt raw materials for the production of recycled asphalt mixtures.

[0003] When recycling waste asphalt mixtures, the mixture must first undergo crushing pretreatment to reduce its particle size to a specified range to facilitate subsequent separation processes. However, during the crushing process, because old asphalt retains plasticity even at room temperature, some materials, under mechanical compression and shearing, are not effectively crushed. Instead, due to their plasticity, they are squeezed, kneaded, and rolled, undergoing plastic deformation and secondary agglomeration, reshaping into long strips or flakes that are still significantly oversized. This phenomenon makes it difficult to achieve the preset particle size requirements during crushing, resulting in uneven particle size after crushing, which directly hinders the processing accuracy of subsequent separation processes and the purification quality of the recycled asphalt. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide an asphalt recycling device in waste asphalt mixture, so as to solve the problem that the plasticity of old asphalt leads to a high probability of material crushing failure and affects the quality of subsequent separation and processing.

[0005] To solve the above problems, the present invention adopts the following technical solution: A device for recovering asphalt from waste asphalt mixture includes a feeding hopper, with multiple discharge ports at the lower end of the feeding hopper connected to conveying hoppers, and the front ends of the multiple conveying hoppers connected to crushing hoppers. The device also includes a crushing mechanism disposed inside the crushing hopper. The crushing mechanism includes two crushing rollers rotatably connected inside the crushing hopper. A second motor is fixedly connected to the left side of the crushing hopper. A driving gear and a driven gear are respectively fixedly connected to the left ends of the two crushing rollers. The driving gear and the driven gear mesh with each other. The output shaft of the second motor is fixedly connected to the axis of the driving gear. The radius of the driving gear is smaller than the radius of the driven gear.

[0006] Furthermore, an auger is rotatably connected inside the conveying chamber, and a first support plate is fixedly connected to the upper surface of the rear end of the conveying chamber. A connecting support bar is fixedly connected to the upper surface of the first support plate, and multiple transmission gears and multiple relay gears are rotatably connected to the surface of the connecting support bar. The multiple transmission gears and multiple relay gears are arranged at intervals, and each adjacent transmission gear and relay gear meshes with each other.

[0007] Furthermore, the central shafts of the plurality of augers are respectively fixedly connected to the plurality of transmission gears, and a first motor is fixedly connected to the upper surface of the first support plate, and the output shaft of the first motor is fixedly connected to the shaft of any one of the transmission gears.

[0008] Furthermore, it also includes a reflux mechanism, which is disposed inside the crushing chamber. The reflux mechanism includes a screening screen plate fixedly connected to the front end of the crushing chamber. A drive rack is slidably inserted inside the left side wall of the crushing chamber. A guide frame is fixedly connected to the left surface of the crushing chamber. The drive rack is slidably connected to the inside of the guide frame. A waste push block is fixedly connected to the right end of the drive rack. A reflux arc-shaped channel is provided at the right end of the crushing chamber. Both ends of the reflux arc-shaped channel are connected to the right side wall of the crushing chamber. A slope plate is fixedly connected to the rear end of the crushing chamber.

[0009] Furthermore, a third motor is fixedly connected to the left side wall of the crushing chamber, and a drive gear is fixedly connected to the output shaft of the third motor.

[0010] Furthermore, the drive gear meshes with the drive rack.

[0011] Furthermore, a push rod is fixedly connected to the left end of the drive rack, and a second support plate is fixedly connected to the right end of the push rod. A diagonal brace is slidably inserted inside the second support plate, and a first spring is fixedly connected to the short arm end of the diagonal brace. The lower end of the first spring is fixedly connected to the second support plate.

[0012] Furthermore, the diagonal brace is internally rotatably connected to a support shaft.

[0013] Furthermore, it also includes a dredging mechanism, which is disposed on the surface of the feeding hopper. The dredging mechanism includes two third support plates that are fixedly connected to the left and right ends of the feeding hopper, respectively. An extrusion conveying plate is slidably inserted inside the feeding hopper.

[0014] Furthermore, a push roller is rotatably connected between the two third support plates, and multiple support square plates are fixedly connected to the upper surface of the transverse arm end of the extrusion conveying plate. A second spring is fixedly connected between each of the multiple support square plates and the feed bin. A fourth motor is fixedly connected to the left side of the feed bin, and the output shaft of the fourth motor is fixedly connected to the left end of the push roller. A roller for reducing friction is rotatably connected to the transverse arm end of the extrusion conveying plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) This scheme uses a second motor to drive the active gear and the passive gear to rotate, and to crush the asphalt mixture between the two crushing rollers. Since the diameter of the active gear is smaller than that of the passive gear, the rotation speeds of the active gear and the passive gear are different, which makes the rotation speeds between the two crushing rollers different. At the same time as crushing, it plays a tearing role, reducing the probability of the asphalt mixture being reshaped.

[0016] (2) In this scheme, when the crushed asphalt mixture passes through the screening screen, the screening screen will block the asphalt mixture that is too large and has not been crushed. The third motor drives the drive gear to rotate, which in turn drives the drive rack to move, pushing the waste push block to push the unqualified asphalt mixture blocked by the screening screen and some qualified asphalt mixture into the return arc channel. As the asphalt mixture in the return arc channel is continuously pushed in and squeezed, it is pushed into the rear end of the crushing chamber for secondary crushing, thereby improving the crushing quality of the asphalt mixture.

[0017] (3) In this scheme, the push rod and the inclined support plate move synchronously during the movement of the drive rack. The support shaft is always in the mesh of the screen plate by the tension of the first spring. When the inclined support plate enters the mesh of the screen plate, it pushes away the asphalt mixture blocked in the mesh of the screen plate and pushes it into the return arc channel by the waste push block.

[0018] (4) In this scheme, the fourth motor drives the push roller to rotate, and the second spring is always in a compressed state so that the roller on the transverse arm end of the extrusion conveyor plate, which is used to reduce friction, is always in contact with the surface of the push roller. When the roller is in the concave part of the push roller, the extrusion conveyor plate moves forward, and when the roller is in the convex part of the push roller, the extrusion conveyor plate moves backward. This performs preliminary extrusion and crushing on the asphalt mixture entering the conveying bin, reduces the pressure of the subsequent crushing roller, and at the same time plays a role in clearing the blockage and reducing the probability of blockage of the asphalt mixture in the feed bin. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the back of the feed hopper of the present invention; Figure 3This is a schematic diagram of the internal structure of the crushing chamber of the present invention; Figure 4 This is a schematic diagram of the crushing roller part of the present invention; Figure 5 This is a schematic diagram of the structure of the drive rack and push rod part of the present invention; Figure 6 This is a schematic diagram of the extrusion conveyor plate portion of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle.

[0020] Explanation of the labels in the diagram: 101. Feed hopper; 102. Conveying hopper; 103. Crushing hopper; 104. First motor; 105. First support plate; 106. Connecting support bar; 107. Transmission gear; 108. Relay gear; 109. Screwdriver; 110. Second motor; 111. Crushing roller; 112. Drive gear; 113. Driven gear; 114. Slope plate; 115. Screening screen plate; 201. Drive gear; 202. Return arc-shaped channel; 203. Third motor; 204. Guide frame; 205. Drive rack; 206. Waste pusher block; 207. Push rod; 208. Second support plate; 209. Diagonal brace plate; 210. First spring; 211. Support shaft; 301. Fourth motor; 302. Extrusion conveyor plate; 303. Push roller; 304. Third support plate; 305. Second spring; 306. Support square plate; 307. Roller. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-5A device for recovering asphalt from waste asphalt mixture includes a feeding hopper 101. Multiple discharge ports at the lower end of the feeding hopper 101 are connected to conveying hoppers 102. The front ends of the multiple conveying hoppers 102 are connected to crushing hoppers 103. The device also includes a crushing mechanism located inside the crushing hopper 103. The crushing mechanism includes two crushing rollers 111 rotatably connected inside the crushing hopper 103. A second motor 110 is fixedly connected to the left side of the crushing hopper 103. A driving gear 112 and a driven gear 113 are fixedly connected to the left ends of the two crushing rollers 111, respectively. The driving gear 112 and the driven gear 113 mesh with each other. The output shaft of the second motor 110 is fixedly connected to the axis of the driving gear 112. The radius of the driving gear 112 is smaller than the radius of the driven gear 113.

[0023] The conveying chamber 102 is rotatably connected to an auger 109. A first support plate 105 is fixedly connected to the upper rear surface of the conveying chamber 102. A connecting support bar 106 is fixedly connected to the upper surface of the first support plate 105. A plurality of transmission gears 107 and a plurality of relay gears 108 are rotatably connected to the surface of the connecting support bar 106. The plurality of transmission gears 107 and the plurality of relay gears 108 are arranged at intervals. Each adjacent transmission gear 107 and relay gear 108 meshes with each other. The central shafts of the plurality of augers 109 are fixedly connected to the plurality of transmission gears 107 respectively. A first motor 104 is fixedly connected to the upper surface of the first support plate 105. The output shaft of the first motor 104 is fixedly connected to the axis of any one of the transmission gears 107.

[0024] To address the issue of reprocessing substandard large particles, this embodiment further incorporates a reflux mechanism inside the crushing chamber 103. This reflux mechanism includes a screening screen 115 fixedly connected to the front end of the crushing chamber 103. A drive rack 205 is slidably inserted into the left side wall of the crushing chamber 103. A guide frame 204 is fixedly connected to the left surface of the crushing chamber 103, and the drive rack 205 is slidably connected to the guide frame 204. A waste pusher block 206 is fixedly connected to the right end of the drive rack 205. A reflux arc-shaped channel 202 is provided at the right end of the crushing chamber 103, with both ends connected to the right side wall of the crushing chamber 103. The crushing chamber 103 is internally connected to a slope plate 114 at its rear end. A third motor 203 is fixedly connected to the left side wall of the crushing chamber 103. A drive gear 201 is fixedly connected to the output shaft of the third motor 203. The drive gear 201 meshes with a drive rack 205. A push rod 207 is fixedly connected to the left end of the drive rack 205. A second support plate 208 is fixedly connected to the right end of the push rod 207. A diagonal brace 209 is slidably inserted inside the second support plate 208. A first spring 210 is fixedly connected to the short arm end of the diagonal brace 209. The lower end of the first spring 210 is fixedly connected to the second support plate 208. A support shaft 211 is rotatably connected inside the diagonal brace 209.

[0025] In the initial stage of equipment operation, the asphalt mixture enters the feed hopper 101 and falls into the conveying hopper 102. Then, the first motor 104 drives the transmission gear 107 to rotate, and through the relay gear 108, the power is transmitted to simultaneously drive multiple augers 109, thus conveying the asphalt mixture to the crushing hopper 103. With the continuous input of asphalt mixture, the asphalt mixture in the crushing hopper 103 is squeezed and pushed between two crushing rollers 111. Simultaneously, the second motor 110 drives the drive gear 112 and the driven gear 113 to rotate, thus squeezing and crushing the asphalt mixture between the two crushing rollers 111. Since the diameter of the drive gear 112 is smaller than the diameter of the driven gear 113... The gear ratio and transmission ratio of the driving gear 112 and the driven gear 113 are set between a fixed shaft connection of 1:1.5 and a fixed shaft connection of 1:2.5. Under this transmission ratio, the relative linear velocity difference between the two crushing rollers 111 is sufficient to overcome the viscoelastic limit of the old asphalt itself, effectively cutting long strips or sheet-like plastic deformable materials and maximizing the tearing effect. Therefore, when the driving gear 112 drives the driven gear 113 to rotate, the rotation speeds of the driving gear 112 and the driven gear 113 are different, and the rotation speeds between the two crushing rollers 111 are also different. This can crush the asphalt mixture while tearing it, thereby reducing the probability of the asphalt mixture being reshaped.

[0026] After the asphalt mixture is crushed, it is continuously pushed out of the crushing chamber 103 as it is continuously fed in. When it passes through the screening screen 115, the screen 115 can block the asphalt mixture that is too large or has not been crushed. At the same time, the third motor 203 drives the drive gear 201 to rotate, which in turn drives the drive rack 205 to move. This pushes the waste push block 206 towards the return arc channel 202, pushing the unqualified asphalt mixture blocked by the screening screen 115 and some qualified asphalt mixture into the return arc channel 202. As subsequent materials are continuously squeezed into the return arc channel 202, the asphalt mixture inside the channel is squeezed and pushed into the rear end of the crushing chamber 103 for secondary crushing, thereby improving the crushing quality of the asphalt mixture.

[0027] During the movement of the drive rack 205, the push rod 207 and the inclined support plate 209 will also move synchronously. The tension of the first spring 210 can keep the support shaft 211 in the mesh of the screening screen plate 115. When the support shaft 211 passes laterally across the solid ribs between the meshes, the inclined support plate 209 is squeezed by the ribs and overcomes the elastic force of the first spring 210 to push outward. After passing the ribs, it springs back into the adjacent mesh. When the inclined support plate 209 enters the mesh of the screening screen plate 115, it can push away the asphalt mixture blocked in the mesh of the screening screen plate 115 and push it into the return arc channel 202 through the waste push block 206.

[0028] like Figure 6 and Figure 7 As shown, it also includes a dredging mechanism, which is disposed on the surface of the feeding hopper 101. The dredging mechanism includes two third support plates 304 respectively fixedly connected to the left and right ends of the feeding hopper 101. An extrusion conveying plate 302 is slidably inserted inside the feeding hopper 101. A push roller 303 is rotatably connected between the two third support plates 304. Multiple support square plates 306 are fixedly connected to the upper surface of the transverse arm end of the extrusion conveying plate 302. A second spring 305 is fixedly connected between each of the multiple support square plates 306 and the feeding hopper 101. A fourth motor 301 is fixedly connected to the left side of the feeding hopper 101. The output shaft of the fourth motor 301 is fixedly connected to the left end of the push roller 303. A roller 307 for reducing friction is rotatably connected to the transverse arm end of the extrusion conveying plate 302.

[0029] By adopting the above technical solution, when the asphalt mixture enters the feed hopper 101, the fourth motor 301 drives the push roller 303 to rotate. Since the second spring 305 is always in a compressed state, the roller 307 on the transverse arm end of the extrusion conveying plate 302, which is used to reduce friction, can always abut against the surface of the push roller 303. When the roller 307 is located in the concave part of the push roller 303, the extrusion conveying plate 302 moves forward. When the roller 307 is located in the convex part of the push roller 303, the extrusion conveying plate 302 moves backward. This can perform preliminary extrusion and crushing on the asphalt mixture entering the conveying hopper 102, reduce the pressure of the subsequent crushing roller 111, and also play a role in unblocking, reducing the probability of blockage of the asphalt mixture in the feed hopper 101.

[0030] Usage method: After the asphalt mixture enters the feeding hopper 101, it falls into the conveying hopper 102. The first motor 104 drives multiple screw conveyors 109 to rotate through the transmission gear 107 and the relay gear 108, conveying the mixture to the crushing hopper 103 and continuously squeezing and pushing it between the two crushing rollers 111. The second motor 110 drives the active gear 112 and the passive gear 113 to rotate. Because the diameter of the active gear 112 is smaller than that of the passive gear 113, the two crushing rollers 111 rotate at different speeds, which crushes and tears the asphalt mixture. The crushed mixture is pushed out of the crushing chamber 103. When it passes through the screening screen 115, the material that is too large is blocked. The third motor 203 drives the drive gear 201 to rotate, which in turn causes the drive rack 205 to move. The waste push block 206 pushes the unqualified material and some qualified material on the screening screen 115 into the return arc channel 202. Through continuous pushing, the return material enters the rear end of the crushing chamber 103 for secondary crushing. When the drive rack 205 moves, it synchronously drives the push rod 207 and the inclined support plate 209 to move. The tension of the first spring 210 keeps the support shaft 211 in the mesh of the screening screen plate 115. When the inclined bracing plate 209 enters the mesh, it pushes away the blocked mixture and pushes it into the return arc channel 202 by the waste push block 206; When the asphalt mixture enters the feed hopper 101, the fourth motor 301 drives the push roller 303 to rotate. When the roller 307 is in the concave part of the push roller 303, the extrusion conveyor plate 302 moves forward and when it is in the convex part, it moves backward, which performs preliminary extrusion and crushing of the feed and plays a role in clearing the blockage.

[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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. An asphalt recovery device for waste asphalt mixtures, comprising a feeding hopper (101), wherein multiple discharge ports at the lower end of the feeding hopper (101) are connected to conveying hoppers (102), and the front ends of the multiple conveying hoppers (102) are connected to crushing hoppers (103), characterized in that: It also includes a crushing mechanism, which is located inside the crushing chamber (103). The crushing mechanism includes two crushing rollers (111) rotatably connected inside the crushing chamber (103). A second motor (110) is fixedly connected to the left side of the crushing chamber (103). The left ends of the two crushing rollers (111) are respectively fixedly connected to a drive gear (112) and a driven gear (113). The drive gear (112) and the driven gear (113) mesh with each other. The output shaft of the second motor (110) is fixedly connected to the axis of the drive gear (112). The radius of the drive gear (112) is smaller than the radius of the driven gear (113).

2. The asphalt recovery device in waste asphalt mixture according to claim 1, characterized in that: The conveying chamber (102) is rotatably connected to an auger (109). A first support plate (105) is fixedly connected to the upper surface of the rear end of the conveying chamber (102). A connecting support bar (106) is fixedly connected to the upper surface of the first support plate (105). A plurality of transmission gears (107) and a plurality of relay gears (108) are rotatably connected to the surface of the connecting support bar (106). The plurality of transmission gears (107) and the plurality of relay gears (108) are arranged at intervals, and each adjacent transmission gear (107) and relay gear (108) meshes with each other.

3. The asphalt recovery device in waste asphalt mixture according to claim 2, characterized in that: The central shafts of the plurality of augers (109) are fixedly connected to the plurality of transmission gears (107), and a first motor (104) is fixedly connected to the upper surface of the first support plate (105). The output shaft of the first motor (104) is fixedly connected to the shaft of any one of the transmission gears (107).

4. The asphalt recovery device in waste asphalt mixture according to claim 1, characterized in that: It also includes a reflux mechanism, which is located inside the crushing chamber (103). The reflux mechanism includes a screening screen plate (115) fixedly connected to the front end of the crushing chamber (103). A drive rack (205) is slidably inserted inside the left side wall of the crushing chamber (103). A guide frame (204) is fixedly connected to the left surface of the crushing chamber (103). The drive rack (205) is slidably connected to the inside of the guide frame (204). A waste push block (206) is fixedly connected to the right end of the drive rack (205). A reflux arc-shaped channel (202) is provided at the right end of the crushing chamber (103). Both ends of the reflux arc-shaped channel (202) are connected to the right side wall of the crushing chamber (103). A slope plate (114) is fixedly connected to the rear end of the crushing chamber (103).

5. The asphalt recovery device in waste asphalt mixture according to claim 4, characterized in that: A third motor (203) is fixedly connected to the left side wall of the crushing chamber (103), and a drive gear (201) is fixedly connected to the output shaft of the third motor (203).

6. The asphalt recovery device in waste asphalt mixture according to claim 5, characterized in that: The drive gear (201) meshes with the drive rack (205).

7. The asphalt recovery device in waste asphalt mixture according to claim 4, characterized in that: The left end of the drive rack (205) is fixedly connected to a push rod (207), and the right end of the push rod (207) is fixedly connected to a second support plate (208). A diagonal brace (209) is slidably inserted inside the second support plate (208). A first spring (210) is fixedly connected to the short arm end of the diagonal brace (209), and the lower end of the first spring (210) is fixedly connected to the second support plate (208).

8. The asphalt recovery device in waste asphalt mixture according to claim 7, characterized in that: The internal rotatable connection of the bracing plate (209) is a support shaft (211).

9. The asphalt recovery device in waste asphalt mixture according to claim 1, characterized in that: It also includes a dredging mechanism, which is disposed on the surface of the feed hopper (101). The dredging mechanism includes two third support plates (304) that are fixedly connected to the left and right ends of the feed hopper (101) respectively. An extrusion conveying plate (302) is slidably inserted inside the feed hopper (101).

10. The asphalt recovery device in waste asphalt mixture according to claim 9, characterized in that: A push roller (303) is rotatably connected between the two third support plates (304). Multiple support square plates (306) are fixedly connected to the upper surface of the transverse arm end of the extrusion conveying plate (302). A second spring (305) is fixedly connected between the multiple support square plates (306) and the feed bin (101). A fourth motor (301) is fixedly connected to the left side of the feed bin (101). The output shaft of the fourth motor (301) is fixedly connected to the left end of the push roller (303). A roller (307) for reducing friction is rotatably connected to the transverse arm end of the extrusion conveying plate (302).

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