Grate sorting machine and method for sorting impurities in asphalt pavement recycling materials

Abstract

The present invention discloses a grate sorting machine and method for sorting impurities in asphalt pavement recycled materials, comprising: a frame, a grate mechanism mounted on the frame, and scraper mechanisms located on the outer sides of the grate mechanism; the grate mechanism is used to block and convey impurities in the asphalt pavement recycled materials on a return belt conveyor; and the scraper mechanism is used to scrape off impurities blocked by the grate. The grate sorting machine is positioned across the return belt conveyor, and the grate mechanism can block impurities in the asphalt pavement recycled materials running on the return belt conveyor. The grate mechanism can also carry out the impurities and simultaneously scrape them off in combination with the scraper mechanism. That is, the grate sorting machine can automatically sort and remove impurities in the asphalt pavement recycled materials, facilitating the subsequent fine separation and screening process of the recycled materials.

Description

Technical Field

[0001] The invention belongs to the field of grate sorting machines, and in particular relates to a grate sorting machine and a method for sorting impurities in asphalt pavement recycled materials. Background Art

[0002] my country's high-grade highway asphalt pavements have entered the maintenance stage on a large scale, with over 200 million tons of recycled asphalt pavement material generated annually through milling. Due to technical and process limitations, the proportion of recycled material in factory-mixed hot regeneration technology suitable for high-grade highway asphalt pavements is generally less than 30%. Research and practice have shown that the asphalt content of coarse aggregate in the recycled material after fine separation is extremely low and can be used as new aggregate, greatly increasing the proportion of recycled material in the recycled asphalt mixture, making it a recycling method with great application prospects. However, these recycled materials are often accompanied by long impurities such as non-woven fabrics, anti-cracking stickers, and markings. Patents CN113152209A and CN110523638A both disclose equipment and methods for fine separation of recycled asphalt pavement materials. However, neither of the above patents mentions methods for removing long impurities such as non-woven fabrics, anti-cracking stickers, and markings from the recycled materials. As a result, these impurities still exist in the recycled material after fine separation, which can easily cause blockage of vibrating screens and high-frequency screens, affecting equipment output and the accuracy of recycled material screening.

[0003] Therefore, there is an urgent need for a device that can effectively remove impurities such as non-woven fabrics, anti-cracking stickers and markings in recycled materials. Summary of the Invention

[0004] Purpose of the invention: The first purpose of the present invention is to provide a grate sorting machine that can effectively sort and remove impurities such as non-woven fabrics, anti-cracking stickers and markings from asphalt pavement recycling materials;

[0005] A second object of the present invention is to provide a method for sorting using the above-mentioned grate sorting machine.

[0006] Technical solution: The grate sorting machine of the present invention is used for sorting impurities in asphalt pavement recycling materials, comprising: a frame, a grate mechanism provided on the frame, and scraper mechanisms located outside both ends of the grate mechanism;

[0007] A grate mechanism is used to block and convey impurities in the asphalt pavement recycled material on the return belt conveyor; it includes a plurality of grate bars arranged in sequence on the left and right, and a sliding mechanism for fixing and enabling the plurality of grate bars to slide left and right. The sliding mechanism includes a guide plate provided on a frame and having a transmission cross-section consistent with the return belt conveyor. The upper ends of the plurality of grate bars are connected to the lower end of the guide plate via a guide wheel mechanism, and the middle ends of the plurality of grate bars are connected to the sliding guide rail. The grate bar section located between the sliding guide rail and the guide rail plate is provided with a return spring to enable the grate bars to move up and down.

[0008] The scraper mechanism is used to scrape off impurities blocked on the grate bars; it includes a scraper and a driving assembly that drives the scraper to move forward and backward and up and down.

[0009] Furthermore, the sliding guide rail of the grate sorting machine includes a rack plate arranged at the middle end of a plurality of grate bars, and the rack plate is connected and slidably arranged on the guide rail shaft through a slider, and the guide rail shaft is fixed on the frame.

[0010] Furthermore, the grate sorting machine also includes a driving mechanism for driving the sliding mechanism to slide. The driving mechanism includes a motor, a transmission shaft connected to the motor, and a gear provided on the transmission shaft and meshing with the rack plate. The gear rotates to drive the rack plate to slide left and right.

[0011] Furthermore, the guide wheel mechanism of the grate type sorting machine includes a guide wheel provided at the lower end of the guide rail plate and abutting against the guide rail plate, and the guide wheel is connected to the grate bar via a guide wheel seat.

[0012] Furthermore, the return spring of the grate sorting machine is connected to the guide wheel seat via a spring seat.

[0013] Furthermore, the scraper mechanism of the grate sorting machine also includes a support plate for supporting the scraper, and the driving assembly includes a first bracket arranged on the frame, a cylinder arranged on the first bracket for driving the scraper to move left and right, and a mobile bracket is connected to the telescopic end of the cylinder. The mobile bracket and the support plate are connected through a guide rail shaft, and a slider is provided on the mobile bracket corresponding to the guide rail shaft; a second bracket fixed to the mobile bracket is provided between the support plate and the mobile bracket, and a cylinder for driving the scraper to move up and down is provided on the second bracket, and the telescopic end of the cylinder is connected to the scraper.

[0014] Furthermore, the grate sorting machine has two groups of grate mechanisms, which are arranged on both sides of the driving mechanism in a left-right arrangement; and four groups of scraper mechanisms, which are respectively arranged at both ends of the two groups of grate mechanisms.

[0015] Furthermore, the grate sorting machine also includes sensors and a PLC control system installed at both ends of the frame. The sensors sense when the grate bars reach both ends of the frame and feed back to the PLC control system to control the start and stop of the scraper mechanism and the forward and reverse operation of the drive mechanism.

[0016] Furthermore, the grate sorting machine also includes a U-shaped recovery bin located at the lower end of the scraper mechanism.

[0017] The present invention adopts the above-mentioned grate sorting machine to carry out sorting method, comprising the following steps:

[0018] (1) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide left or right, and the grate bars at the lower end of the guide plate that is consistent with the transmission cross section of the return belt conveyor block the impurities in the asphalt pavement recycled material on the return belt conveyor and slide left or right with it;

[0019] (2) When the grate bars of the grate mechanism move to the position of the scraper mechanism, the scraper mechanism is driven by the drive assembly to scrape off the impurities on the grate bars;

[0020] (3) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide right or left, repeat the above steps (1) and (2) to perform the sorting operation.

[0021] Beneficial effects: Compared with the existing technology, the significant advantages of the present invention are: the grate sorting machine is arranged across the top of the return belt conveyor, and the impurities in the asphalt pavement recycled material running on the return belt conveyor can be blocked by the grate mechanism, and the impurities can be taken out, and at the same time, the scraper mechanism is combined to scrape them off, that is, the grate sorting machine can sort and remove impurities in the asphalt pavement recycled material, which is convenient for the subsequent fine separation and screening process of the recycled material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional diagram of the grate sorting machine of the present invention in conjunction with the return belt conveyor;

[0023] Figure 2 A perspective view of the grate sorting machine of the present invention;

[0024] Figure 3 This is a front view of the grate sorting machine of the present invention;

[0025] Figure 4 Schematic diagram of the structure of the grate mechanism of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the driving mechanism and the rack plate of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the scraper mechanism of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 As shown, the grate sorting machine of the present invention is arranged across the return belt conveyor 21 and is used to block, sort and remove impurities in the asphalt pavement recycled material on the return belt conveyor 21.

[0030] like Figure 2 and Figure 3As shown, the grate sorting machine includes a frame 1, a grate mechanism provided on the frame 1, a driving mechanism for driving the grate mechanism, a scraper mechanism located on the outside of both ends of the grate mechanism, and a U-shaped recovery bin 20 located at the lower end of the scraper mechanism, wherein the U-shaped recovery bin 20 is fixedly provided on the frame 1. There are two groups of grate mechanisms, which are identical in length and structure and are respectively provided on both sides of the frame 1, thereby performing a double screening of impurities in the asphalt pavement recycled material. The grate sorting machine mainly uses the grate mechanism to block and sort the impurities in the asphalt pavement recycled material, and then transports them to the scraper mechanism for removal. There are four groups of scraper mechanisms, which are respectively located on the outside of both ends of the two groups of grate mechanisms, thereby being able to remove impurities on the grate mechanisms on each side and each end.

[0031] Among them, such as Figure 4 As shown, the grate mechanism includes a plurality of grate bars 2 arranged transversely along the frame 1 and a sliding mechanism for securing the plurality of grate bars 2 and enabling the plurality of grate bars 2 to slide left and right. The grate bars 2 of the two sets of grate mechanisms have slightly different lengths to accommodate the inclination of the return belt conveyor 21. The sliding mechanism includes a guide plate 3 fixed across the frame 1, with the plurality of grate bars 2 arranged in sequence on the guide plate 3. The guide plate 3 has a portion that aligns with the conveying cross-section of the return belt conveyor 21 and is located directly above the return belt conveyor 21. The guide plate 3 is preferably a U-shaped guide plate, i.e., a U-shaped groove is provided in the middle. This ensures that the lower end of the grate bars 2 on the guide plate 3 corresponding to the belt surface of the return belt conveyor 21 always maintains a 5mm gap with the belt surface. While effectively blocking impurities in the asphalt pavement recycled material and allowing the material to pass through, there is no collision or friction between the grate bars 2 and the belt surface of the return belt conveyor 21. The top ends of the grate bars 2 are fixedly connected to the guide rail plate 3 via a guide wheel 12 and a guide wheel seat 13, both of which are secured by a pin 23. The provision of the guide wheel 12 allows the grate bars 2 to conform to the shape of the guide rail plate 3 during sliding. The middle ends of the grate bars 2 are connected to a rack plate 6, which is connected to a guide shaft 8 via a slider 7 and positioned by a linear bearing 22. The guide shaft 8 is also arranged across the frame 1, and the movement of the rack plate 6 drives the grate bars 2 to slide along the guide rail plate 3.

[0032] A return spring 4 is provided on the section of grate bar 2 located between the guide plate 3 and the rack plate 6, and the other end of the return spring 4 is mounted on the rack plate 6 via a spring seat 14. That is, the return spring 4 is disposed between the guide wheel seat 13 and the spring seat 14. The return spring 20, through the positioning of the linear bearing 22, enables the grate bar 18 to move up and down within the linear bearing 37. In other words, the arrangement of the return spring 4 and the guide plate 6 allows the grate bar 2 to move up and down to adapt to the cross-sectional shape of the return belt conveyor 21, thereby effectively blocking impurities in the asphalt pavement recycled material on the belt surface of the return belt conveyor 21.

[0033] The driving mechanism of the grate sorting machine includes a motor 9, which is fixed to the frame 1 through a motor base 24. The motor 9 is connected to a transmission shaft 10 through a coupling, and the transmission shaft 10 is connected to a gear 11 meshing with the rack plate 6. The motor 9 drives the gear 11 to rotate and then drives the rack plate 6 to slide left and right. Figure 5 As shown, the grate mechanism slides left and right, and finally the grate mechanism transports the impurities blocked on the grate 2 out of the return belt conveyor 21. Correspondingly, the two sets of grate mechanisms are respectively located on both sides of the driving mechanism, and the two sets of grate mechanisms are arranged on the left and right sides, and the rack plates 6 are engaged with the gear 11, so that the gear 11 rotates to drive the grate mechanisms on both sides to move relative to each other.

[0034] like Figure 6 As shown, the scraper mechanism includes a scraper 5, a support plate 15 located at the lower end of the scraper 5 to support it, and a drive assembly that drives the scraper 5 to move up and down and back and forth. Through the up and down, back and forth movement of the scraper 5, impurities carried on the grate bars 2 can be effectively scraped off, and the scraped impurities fall into the U-shaped recovery bin 20 located at the lower end of the scraper mechanism. The drive assembly includes a first bracket 16 fixed to the frame 1, and a transverse cylinder 17 is provided on the first bracket 16, and the telescopic section of the cylinder 17 is connected to a movable bracket 18. The movable bracket 18, the support plate 15, and the scraper 5 are connected by a guide shaft 8, and the guide shaft 8 is provided at both ends of the scraper 5. A movable slider 7 is provided at the connection between the guide shaft 8 and the movable bracket 18, and a vertical cylinder 17 and a second bracket 19 are provided between the movable bracket 18 and the scraper 5. The second bracket 19 is fixed on the movable bracket 18, and the telescopic end of the cylinder 17 is connected to the scraper 5. The movable bracket 18 is driven to move forward and backward by the horizontal cylinder 17, and the scraper 5 is moved up and down by the vertical cylinder 17, the guide shaft 8 and the slider 7.

[0035] In order to effectively remove impurities on the grate bars 2, the sum of the lengths of the scrapers 5 at the left and right ends of the scraper mechanism of the present invention should be greater than or equal to the length of the several rows of grate bars across the return belt conveyor 21.

[0036] In addition to the above, the grate sorting machine of the present invention also includes sensors located at both ends of the frame 1. Through the configuration of these sensors, when the grate bars 2 reach the end position of the frame 1, the sensors provide feedback to the PLC control system, causing the drive mechanism to stop and the scraper mechanism to start. When the scraper mechanism completes one up and down movement, the PLC control system controls the drive mechanism to reverse. The configuration of the sensors, the monitoring and feedback of the sensors, and the control of the PLC control system based on this operating mode are well known in the art.

[0037] The present invention adopts the above-mentioned grate sorting machine to carry out sorting method, comprising the following steps:

[0038] (1) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide left or right, and the grate bars at the lower end of the guide plate that is consistent with the transmission cross section of the return belt conveyor block the impurities in the asphalt pavement recycled material on the return belt conveyor and slide left or right with it;

[0039] (2) When the grate bars of the grate mechanism move to the position of the scraper mechanism, the scraper mechanism is driven by the drive assembly to scrape off the impurities on the grate bars;

[0040] (3) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide right or left, repeat the above steps (1) and (2) to perform the sorting operation.

[0041] Specifically:

[0042] (1) The grate sorting machine is set across the return belt conveyor and its position is adjusted so that the grate bars of the grate mechanism set on both sides are kept 5 mm away from the belt surface of the return belt conveyor;

[0043] (2) starting the driving assembly to make the grate mechanism slide left or right, and the grate located at the upper end of the return belt conveyor can block the impurities in the asphalt pavement recycled material running on the return belt conveyor and slide left or right together;

[0044] (3) When the grate bar at one end enters the position of the scraper mechanism and reaches the end of the frame, the sensor on the frame feeds back to the PLC control system, which then controls the drive mechanism to stop running and starts the scraper mechanism to fit the grate bar for cleaning. When the scraper mechanism finishes one up and down movement, the PLC control system controls the drive mechanism to run in the reverse direction.

[0045] (4) Similarly, when the grate bar slides to the other end, the same process as step (3) is repeated.

[0046] (5) The grate mechanism moves back and forth until the asphalt pavement recycled material on the return belt conveyor is sorted.

Claims

1. A grate sorting machine for sorting impurities in asphalt pavement recycling materials, characterized in that: include: A frame (1), a grate mechanism provided on the frame (1), and scraper mechanisms located outside both ends of the grate mechanism; Wherein, the grate mechanism is used to block and convey impurities in the asphalt pavement recycling material running on the return material belt conveyor; it includes a plurality of grate bars (2) arranged in sequence on the left and right, and a sliding mechanism for fixing and realizing the left and right sliding of the plurality of grate bars (2); the sliding mechanism includes a guide plate (3) provided on the frame (1) and having a transmission cross-section consistent with the return material belt conveyor; the upper ends of the plurality of grate bars (2) are connected to the lower end of the guide plate (3) through a guide wheel mechanism; the middle ends of the plurality of grate bars (2) are connected to a sliding guide rail; the sliding guide rail includes a rack plate (6) provided at the middle ends of the plurality of grate bars (2); the grate bar (2) section located between the sliding guide rail and the guide plate is provided with a return spring (4) to realize the up and down movement of the grate bar (2); A scraper mechanism is used to scrape off impurities blocked on the grate bars (2); it comprises a scraper (5) and a drive assembly for driving the scraper (5) to move forward and backward and up and down; The grate sorting machine further comprises a driving mechanism for driving the sliding mechanism to slide; two groups of grate mechanisms are respectively arranged on both sides of the driving mechanism in a left-right arrangement; four groups of scraper mechanisms are respectively arranged at both ends of the two groups of grate mechanisms; The grate sorting machine further comprises sensors and a PLC control system provided at both ends of the frame (1); the sensors sense when the grate bars (2) reach the ends of the frame (1), and feedback is sent to the PLC control system to control the start and stop of the scraper mechanism and the forward and reverse operation of the drive mechanism.

2. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 1, characterized in that: The rack plate (6) is connected and slidably arranged on the guide rail shaft (8) via a slider (7), and the guide rail shaft (8) is fixedly arranged on the frame (1).

3. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 2, characterized in that: The driving mechanism comprises a motor (9), a transmission shaft (10) connected to the motor (9), and a gear (11) provided on the transmission shaft (10) and meshing with the rack plate (6); the gear (11) rotates to drive the rack plate (6) to slide left and right.

4. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 1, characterized in that: The guide wheel mechanism comprises a guide wheel (12) provided at the lower end of the guide rail plate (3) and abutting against the guide rail plate (3); the guide wheel (12) is connected to the grate bar (2) via a guide wheel seat (13).

5. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 4, characterized in that: The return spring (4) is connected to the guide wheel seat (13) via a spring seat (14).

6. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 1, characterized in that: The scraper mechanism further includes a support plate (15) for supporting the scraper (5), the driving assembly includes a first bracket (16) provided on the frame (1), a cylinder (17) provided on the first bracket (16) for driving the scraper (5) to move forward and backward, a movable bracket (18) connected to the telescopic end of the cylinder (17), the movable bracket (18) and the support plate (15) are connected via a guide rail shaft (8), and a slider (7) is provided on the movable bracket (18) at a position corresponding to the guide rail shaft (8); a second bracket (19) fixed to the movable bracket (18) is provided between the support plate (15) and the movable bracket (18), the cylinder (17) for driving the scraper (5) to move up and down is provided on the second bracket (19), and the telescopic end of the cylinder (17) is connected to the scraper (5).

7. The grate sorting machine for sorting impurities in asphalt pavement recycled materials according to claim 1, characterized in that: The grate sorting machine also includes a U-shaped recovery bin (20) located at the lower end of the scraper mechanism.

8. A method for sorting using the grate sorting machine according to claim 3, characterized in that: The steps include: (1) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide left or right, and the grate bars at the lower end of the guide plate that is consistent with the transmission cross section of the return belt conveyor block the impurities in the asphalt pavement recycled material on the return belt conveyor and slide left or right with it; (2) When the grate bars of the grate mechanism move to the position of the scraper mechanism, the drive assembly drives the scraper mechanism to scrape off the impurities on the grate bars; (3) Start the driving mechanism, drive the sliding mechanism to drive the grate bars to slide right or left, and repeat the above steps (1) and (2) to perform the sorting operation.

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