Screening device for hot mix plant regeneration pretreatment

Abstract

The utility model relates to the technical field of RAP material screening, in particular to a screening device for hot mix plant regeneration pretreatment, which comprises a screening box, a screening unit and a material cleaning mechanism, the screening box is provided with a feeding hopper, the screening unit comprises a screening mechanism and a screening driver, the screening mechanism and the screening driver are both arranged in the screening box, the screening mechanism is connected with the screening box through the screening driver, the screening mechanism is opposite to the feeding hopper, one end of the material cleaning mechanism is connected with the screening driver, and the other end of the material cleaning mechanism is opposite to the feeding hopper. The other end of the material cleaning mechanism is opposite to the screening mechanism; the screening mechanism and the screening unit are arranged in the screening box and used for screening the input materials, meanwhile, the material cleaning mechanism is arranged in the screening box and connected with the screening drive, the materials accumulated on the screening mechanism are cleaned through the material cleaning mechanism while the materials are screened, and therefore material accumulation is avoided; the screening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of RAP material screening, in particular to a screening device for pretreatment of plant-mixed hot regeneration. Background Art

[0002] RAP material is recycled asphalt pavement material, which is an important component of factory-mixed hot recycling mixed materials. Since the original old asphalt pavement has been exposed to natural factors such as oxidation, sunlight, rain, and traffic loads generated by direct contact with tires for a long time, it will inevitably age. If the recycled asphalt pavement material is directly subjected to factory-mixed hot recycling, it will not meet the use requirements, and the recycled asphalt pavement material is mixed with particles and dust. The dust and particles will affect the factory-mixed hot recycling processing quality of the recycled asphalt pavement material. Therefore, pretreatment of the recycled asphalt pavement material before production is very necessary, and a screening device made of a filter mesh is required to remove particulate impurities in the recycled asphalt pavement material.

[0003] For example, the Chinese utility model patent with application number 202121798124.0 provides a green sponge city drainage asphalt pavement recycling and intelligent screening equipment. It realizes RAP material screening by setting up a multi-stage screening structure. However, it has the problem of material accumulation and inconvenient cleaning, which affects the screening efficiency and cannot meet actual screening needs. Utility Model Content

[0004] The purpose of the utility model is to provide a screening device for pre-treatment of hot regeneration of factory-mixed materials, so as to solve the technical problem of low screening efficiency caused by material accumulation in current screening devices.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A screening device for pre-treatment of hot regeneration of factory-mixed materials, comprising a screening box, a screening unit and a material cleaning mechanism;

[0007] A feed hopper is provided on the screening box, and the screening unit includes a screening mechanism and a screening drive. The screening mechanism and the screening drive are both arranged in the screening box. The screening mechanism is connected to the screening box through the screening drive, and the screening mechanism is opposite to the feed hopper. One end of the cleaning mechanism is connected to the screening drive, and the other end of the cleaning mechanism is opposite to the screening mechanism.

[0008] It is further defined that a drive placement compartment is provided on the top of the screening box;

[0009] The screening drive includes a bidirectional motor, two output shafts and two cams. The bidirectional motor is connected to the screening box through a drive placement bin. The output ends of the bidirectional motor are connected to one end of the output shaft, and the other ends of the two output shafts pass through the drive placement bin and are connected to the corresponding cams.

[0010] The screening mechanism includes a spring, a cylinder, a sieve layer and a receiving block. The sieve layer is arranged at the bottom of the cylinder and is opposite to the feed hopper. The receiving block is sleeved outside the cylinder. The receiving block is elastically connected to the peripheral side of the screening box through a spring. The cam is located above the receiving block.

[0011] One end of the material cleaning mechanism is connected to the output shaft, and the other end of the material cleaning mechanism is located above the sieve layer.

[0012] Further defined, the side wall of the screening box is provided with a guide rail and a fixing block. The guide rail is vertically arranged. The fixing block is located on the guide rail. The receiving block is slidably connected to the fixing block through a sliding rod. The spring is sleeved outside the sliding rod, and the spring is located between the receiving block and the fixing block.

[0013] Further defined, the number of the guide rails, the number of the fixing blocks and the number of the springs are all two. The two guide rails are arranged on the opposite sides of the cylinder, and the springs are arranged between the corresponding fixing blocks and the receiving block.

[0014] Further defined, the top of the sliding rod is connected to the receiving block. The bottom of the sliding rod passes through the fixing block and extends below the fixing block. The bottom of the sliding rod is connected to a blocking block.

[0015] Further defined, an adjustment bin is arranged at the top inside the screening box. The adjustment bin is located between the two cams. The driving placement bin is located at the middle position of the adjustment bin. The other end of the output shaft passes through the adjustment bin and extends outside the adjustment bin. The other end of the output shaft is rotatably connected to the screening box through the peripheral side.

[0016] One end of the material cleaning mechanism is in transmission connection with the output shaft, and the other end of the material cleaning mechanism passes through the adjustment bin and extends above the sieve layer.

[0017] Further defined, a limiting groove is opened at the bottom of the adjustment bin;

[0018] The number of the material cleaning mechanisms is two. The two material cleaning mechanisms are located on the opposite sides of the driving placement bin;

[0019] The material cleaning mechanism includes a threaded seat, a limiting block, an elastic connecting rod and a brush strip. The output shaft is a screw rod. The threaded seat is sleeved outside the output shaft and is in threaded connection with the output shaft. One end of the limiting block is connected to the outside of the threaded seat. The other end of the limiting block passes through the limiting groove and extends below the limiting groove. The elastic connecting rod is located below the limiting groove. One end of the elastic connecting rod is connected to the other end of the limiting block. The other end of the elastic connecting rod is connected to the top of the brush strip. The brush strip is in contact with the upper end surface of the sieve layer.

[0020] Further defined, a vacuum cleaner communicated with the inside of the screening box is arranged outside the screening box.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] 1. In the present utility model, a screening mechanism and a screening unit are arranged in the screening box to screen the input materials. At the same time, a material cleaning mechanism is arranged in the screening box, and the material cleaning mechanism is connected to the screening drive, so that while screening the materials, the material cleaning mechanism is used to clean the materials accumulated on the screening mechanism, thereby avoiding material accumulation and improving the screening efficiency.

[0023] 2. The present utility model uses a cam to push the material cylinder to vibrate up and down to screen the materials. At the same time, the output shaft is selected as a screw rod. Therefore, when the output shaft rotates, it can drive the material cleaning mechanism to move, realizing the cleaning of the materials accumulated on the sieve layer. At the same time, the brush strip is connected through an elastic connecting rod, so that the brush strip can vibrate along with the sieve layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the main sectional structural schematic diagram of the present utility model;

[0025] Figure 2 is the structural schematic diagram of the threaded seat and the brush strip of the present utility model;

[0026] Figure 3 is the front view structural schematic diagram of the present utility model;

[0027] Figure 4 is the Figure 1 magnified structural schematic diagram at position A of the present utility model;

[0028] Figure 5 is the top view structural schematic diagram of the present utility model;

[0029] In the figure: 1. adjustment bin; 2. material cleaning hopper; 3. feed hopper; 4. output shaft; 5. threaded seat; 6. cam; 7. receiving block; 8. guide rail; 9. guide block; 10. fixed block; 11. screening box; 12. blocking block; 13. sliding rod; 14. material cylinder; 15. sieve layer; 16. brush strip; 17. limit block; 18. limit groove; 19. drive placement bin; 20. bidirectional motor; 21. spring; 22. vacuum cleaner. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1-5, a screening device for plant-mixed hot recycling pretreatment provided by the utility model includes a screening box 11, a screening unit and a material cleaning mechanism. Among them, a feeding hopper 3 is arranged at the top of the screening box 11, and both the screening unit and the material cleaning mechanism are installed inside the screening box 11. The screening unit is used for screening materials (RAP materials), and the material cleaning mechanism is used for cleaning the materials on the screening unit to avoid material accumulation.

[0032] Specifically, the screening unit includes a screening mechanism and a screening drive. The screening drive is connected to the screening box 11 and is used to drive the screening mechanism to vibrate, so as to realize material screening. The screened materials fall through the material discharge port opened at the bottom of the screening box 11, and the larger-sized miscellaneous materials are discharged through the cleaning hopper 2 arranged on the side of the screening box 11, so that the material cleaning mechanism discharges the accumulated materials through the cleaning hopper 2; one end of the material cleaning mechanism is connected to the screening drive, and the other end of the material cleaning mechanism is opposite to the screening mechanism, so that the material cleaning mechanism works synchronously when the screening drive is working.

[0033] Furthermore, a drive placement bin 19 is arranged at the top of the screening box 11. The screening drive includes a bidirectional motor 20, two output shafts 4 and two cams 6. The bidirectional motor 20 is connected to the screening box 11 through the drive placement bin 19. The two output ends of the bidirectional motor 20 are in transmission connection with the corresponding output shafts 4. The output shafts 4 are arranged horizontally, and the ends of the output shafts 4 are connected to the cams 6. The cams 6 are far away from the bidirectional motor 20, and the two cams 6 are symmetrically arranged about the vertical symmetry axis of the bidirectional motor 20. Therefore, when the bidirectional motor 20 drives the corresponding cams 6 to rotate through the output shafts 4, the two cams 6 rotate synchronously.

[0034] The screening mechanism includes a spring 21, a material cylinder 14, a screening layer 15 and a receiving block 7. Among them, the screening layer 15 is installed at the bottom of the material cylinder 14 and is used for filtering materials. The top of the material cylinder 14 is opposite to the feeding hopper 3 and is used for holding materials; the receiving block 7 is sleeved outside the material cylinder 14, the receiving block 7 is located below the cam 6, and the spring 21 is located below the receiving block 7, so that the receiving block 7 is elastically connected to the inner wall of the screening box 11 through the spring 21. Thus, when the cam 6 rotates, it can intermittently press down on the receiving block 7 and then separate from the receiving block 7, so that the receiving block 7 can vibrate up and down after pressing down the spring 21, thereby splitting the materials.

[0035] Specifically, to ensure stable vibration of the barrel 14 during screening, the number of springs 21 is selected to be two, and the two springs 21 are arranged on the opposite sides of the barrel 14. At the same time, two guide rails 8 are arranged on the inner wall of the screening box 11. The guide rails 8 are arranged vertically, and a fixed block 10 is arranged at the bottom of the guide rails 8. The guide rails 8 are arranged corresponding to the springs 21, so that the springs 21 are located between the receiving block 7 and the fixed block 10, so that the springs 21 can be compressed when the barrel 14 is pressed down. A guide block 9 is arranged on the side wall of the receiving block 7, and the guide block 9 cooperates with the guide rail 8 to prevent the barrel 14 from shaking left and right during vibration. The receiving block 7 is slidably connected to the fixed block 10 through a slide rod 13. The spring 21 is sleeved on the outside of the slide rod 13. The bottom end of the slide rod 13 passes through the fixed block 10 and extends below the fixed block 10. The bottom of the slide rod 13 is connected to a blocking block 12 to ensure that the spring 21 can work stably.

[0036] Furthermore, the number of the material cleaning mechanisms is two, and the two material cleaning mechanisms are arranged on the opposite sides of the driving placement bin 19.

[0037] Correspondingly, to prevent the material cleaning mechanism from being damaged when contacting the cam 6 during movement, it is selected to set an adjustment bin 1 at the top inside the screening box 11. The adjustment bin 1 is located between the two cams 6. The driving placement bin 19 is located in the middle of the adjustment bin 1. The two output shafts 4 pass through the adjustment bin 1 and extend to the outside of the adjustment bin 1. To improve the structural stability of the output shaft 4, it is selected that the end of the output shaft 4 outside the adjustment bin 1 is rotatably connected to the side wall of the screening box 11 through a bearing. The cam 6 is sleeved on the output shaft 4. The material cleaning mechanism is located inside the adjustment bin 1 and on the opposite sides of the driving placement bin 19. A limiting groove 18 is opened at the bottom of the adjustment bin 1.

[0038] The material cleaning mechanism includes a threaded seat 5, a limiting block 17, an elastic connecting rod and a brush strip 16. At this time, the output shaft 4 is selected as a screw rod. The threaded seat 5 is sleeved on the corresponding output shaft 4 and is threadedly connected to the output shaft 4. The elastic connecting rod is connected to the threaded seat 5 through the limiting block 17. The brush strip 16 is connected to the bottom of the elastic connecting rod, and the brush strip 16 contacts the sieve layer 15.

[0039] During installation, the limiting groove 18 is located between the threaded seat 5 and the elastic connecting rod. At this time, the limiting block 17 passes through the limiting groove 18, so that the bidirectional motor 20 can change the moving direction of the threaded seat 5 by adjusting the rotation direction of the output shaft 4. Preferably, the spiral directions of the two output shafts 4 are opposite, so that the brush strip 16 can clean the materials accumulated on the sieve layer 15 during movement and prevent accumulation.

[0040] Since the barrel 14 vibrates up and down during screening, to prevent the sieve layer 15 from being damaged due to the fixed position of the brush strip 16 when the sieve layer 15 vibrates up and down, a compression spring is selected to be arranged in the middle of the elastic connecting rod, so that the brush strip 16 can compress the compression spring when being impacted.

[0041] Since the moving direction of the threaded seat 5 is constant when it rotates in the same direction as the output shaft 4, in order to prevent the brush bar 16 from being unable to reciprocate and clean the sieve layer 15 during continuous operation, distance sensors are selected to be arranged on opposite sides of the driving placement bin 19, which can change the current rotation direction of the bidirectional motor 20 when the threaded seat 5 approaches the driving placement bin 19 to a set distance and when the threaded seat 5 moves away from the driving placement bin 19 to a set distance.

[0042] Furthermore, in order to prevent a large amount of dust from being generated during the screening process and polluting the environment, a dust collector 22 is selected to be arranged outside the screening box 11, and the dust collector 22 is arranged offset from the feed hopper 3.

[0043] Working process:

[0044] First, the RAP material can be put into the cylinder 14 in the screening box 11 through the feed hopper 3. After that, driven by the bidirectional motor 20, the output shaft 4 rotates, driving the cam 6 to rotate. The circumference of the cam 6 is elliptical. When the cam 6 rotates, it intermittently presses down on the receiving block 7, and the receiving block 7 drives the cylinder 14 to vibrate intermittently, which is beneficial to dispersing the RAP material and impurities, and preventing the RAP material from accumulating together and affecting the screening effect. The dust collector 22 can suck away the dust.

[0045] At the same time, the guide block 9 moves down as the receiving block 7 moves down, and then drives the slide bar 13 to move down. At this time, the spring 21 is compressed. When the cam 6 rotates out of contact with the receiving block 7, under the action of the spring 21, it pushes the guide block 9 to move up, and then drives the cylinder 14 to move up. Since the spring 21 has elasticity, it will drive the cylinder 14 to vibrate multiple times subsequently, which is beneficial to improving the screening effect.

[0046] Moreover, the guide block 9 is limited by the guide rail 8 to prevent the cylinder 14 from moving out of position, which is beneficial to the stable lifting of the cylinder 14.

[0047] In addition, the output shaft 4 drives the threaded seat 5 to move, and then drives the brush bar 16 to move, to stir the RAP material on the sieve layer 15 and brush the lower end of the sieve layer 15, preventing the through holes of the sieve layer 15 from being blocked, which is beneficial to the impurity particles falling to the bottom of the screening box 11. And, the adjustment bin 1 limits the limit block 17 through the limit groove 18, which is beneficial to the stable movement of the threaded seat 5. In summary, this device is convenient for removing dust and easy for removing impurity particles.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A screening device for plant-mixed hot recycling pretreatment, characterized in that, It includes a screening box (11), a screening unit and a material cleaning mechanism; An inlet hopper (3) is provided on the screening box (11). The screening unit includes a screening mechanism and a screening drive. Both the screening mechanism and the screening drive are arranged inside the screening box (11). The screening mechanism is connected to the screening box (11) through the screening drive. The screening mechanism is opposite to the inlet hopper (3). One end of the material cleaning mechanism is connected to the screening drive, and the other end of the material cleaning mechanism is opposite to the screening mechanism; A drive placement bin (19) is provided at the top of the screening box (11); The screening drive includes a bidirectional motor (20), two output shafts (4) and two cams (6). The bidirectional motor (20) is connected to the screening box (11) through the drive placement bin (19). The output ends of the bidirectional motor (20) are respectively connected to one ends of the output shafts (4). The other ends of the two output shafts (4) both pass through the drive placement bin (19) and are connected to the corresponding cams (6); The screening mechanism includes a spring (21), a material cylinder (14), a screening layer (15) and a receiving block (7). The screening layer (15) is arranged at the bottom of the material cylinder (14). The screening layer (15) is opposite to the inlet hopper (3). The receiving block (7) is sleeved on the outside of the material cylinder (14). The receiving block (7) is elastically connected to the peripheral side of the screening box (11) through the spring (21). The cam (6) is located above the receiving block (7); One end of the material cleaning mechanism is connected to the output shaft (4), and the other end of the material cleaning mechanism is located above the screening layer (15); An adjustment bin (1) is provided at the top inside the screening box (11). A limit groove (18) is opened at the bottom of the adjustment bin (1); The number of the material cleaning mechanisms is two. The two material cleaning mechanisms are located on the opposite sides of the drive placement bin (19); The material cleaning mechanism includes a threaded seat (5), a limit block (17), an elastic connecting rod and a brush strip (16). The output shaft (4) is a screw rod. The threaded seat (5) is sleeved on the outside of the output shaft (4) and is threadedly connected to the output shaft (4). One end of the limit block (17) is connected to the outside of the threaded seat (5). The other end of the limit block (17) passes through the limit groove (18) and extends to the lower part of the limit groove (18). The elastic connecting rod is located below the limit groove (18). One end of the elastic connecting rod is connected to the other end of the limit block (17). The other end of the elastic connecting rod is connected to the top of the brush strip (16). The brush strip (16) contacts the upper end surface of the screening layer (15).

2. The screening device for plant-mixed hot recycling pretreatment according to claim 1, wherein, Guide rails (8) and fixing blocks (10) are provided on the side wall of the screening box (11). The guide rails (8) are arranged vertically. The fixing blocks (10) are located at the bottom of the guide rails (8). Guide blocks (9) are arranged on the peripheral side of the receiving block (7). The guide blocks (9) cooperate with the guide rails (8). The receiving block (7) is slidably connected to the fixing block (10) through a sliding rod (13). The spring (21) is sleeved on the outside of the sliding rod (13). The spring (21) is located between the receiving block (7) and the fixing block (10).

3. The screening device for plant-mixed hot recycling pretreatment according to claim 2, characterized in that, The number of the guide rails (8), the number of the fixed blocks (10) and the number of the springs (21) are all two. The two guide rails (8) are arranged on opposite sides of the barrel (14), and the spring (21) is arranged between the corresponding fixed block (10) and the receiving block (7).

4. The screening device for plant-mixed hot recycling pretreatment according to claim 2, characterized in that, The top of the slide rod (13) is connected to the receiving block (7), the bottom of the slide rod (13) passes through the fixed block (10) and extends to the bottom of the fixed block (10), and the bottom of the slide rod (13) is connected to the blocking block (12).

5. The screening device for plant-mixed hot recycling pretreatment according to claim 3 or 4, characterized in that The regulating chamber (1) is located between the two cams (6), the driving placement chamber (19) is located in the middle of the regulating chamber (1), the other end of the output shaft (4) passes through the regulating chamber (1) and extends to the outside of the regulating chamber (1), and the other end of the output shaft (4) is rotatably connected to the screening box (11) through the circumferential side; One end of the cleaning mechanism is in transmission connection with the output shaft (4), and the other end of the cleaning mechanism passes through the regulating bin (1) and extends to above the screen layer (15).

6. The screening device for plant-mixed hot recycling pretreatment according to claim 5, wherein A dust collector (22) is provided on the outside of the screening box (11) and is in communication with the inside of the screening box (11).

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