Spiral conveyor for conveying asphalt pavement material based on visual detection

Abstract

The present application relates to the technical field of asphalt conveying, and particularly relates to a spiral conveyor for conveying asphalt pavement material based on visual detection, which comprises a spiral conveyor body, a pair of supports are fixedly connected to the outer wall of a discharge port of the spiral conveyor body, a visual detection unit is arranged on each support, a fixing table is arranged below the spiral conveyor body, and a waste frame is arranged on the fixing table, high-precision visual detection units are installed at the discharge port of the spiral conveyor body, the color of discharged asphalt mixture is detected, whether the asphalt mixture meets paving requirements is more accurately judged, and when unqualified asphalt is found, the upper electric telescopic cylinder is started by system control, the telescopic plate is quickly extended, unqualified asphalt is caught, the upper electric telescopic cylinder is retracted, the caught unqualified asphalt is slid into the waste frame and collected, subsequent unified treatment is facilitated, and the production quality of asphalt is improved.

Description

Technical Field

[0001] This invention relates to the field of asphalt conveying technology, and more particularly to a screw conveyor for conveying asphalt pavement material based on vision inspection. Background Technology

[0002] The main function of a screw conveyor for asphalt pavement is to efficiently and evenly transport asphalt mixtures to a designated location. It is widely used in the construction and repair of asphalt pavements and is suitable for transporting various types of asphalt mixtures, including hot-mix asphalt, warm-mix asphalt, and mixtures containing recycled materials. The screw shaft is driven by a motor to rotate, transporting the asphalt mixture from the inlet to the outlet. During the transport process, the blades on the screw shaft continuously stir and turn the material to ensure the uniformity of the mixture. At the same time, heating devices (such as heat-conducting oil pipes or surface burners) maintain the temperature of the mixture to prevent cooling from affecting its construction performance.

[0003] Currently, traditional screw conveyors lack effective detection methods at the discharge port, making it impossible to conduct real-time and accurate detection of the discharged asphalt mixture. This means that asphalt mixtures that do not meet the requirements may directly enter the subsequent road paving stage. When the surface of the mixture is not evenly mixed with asphalt, it will seriously affect the paving quality of the asphalt pavement.

[0004] For example, if the asphalt content in the mixture is insufficient, it can lead to problems such as loosening and cracking of the road surface during use. These problems will not only reduce the service life of the road and increase the cost of later maintenance, but may also pose a threat to traffic safety.

[0005] Therefore, a visual inspection-based screw conveyor for conveying asphalt pavement materials was proposed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing a visual inspection-based screw conveyor for conveying asphalt pavement materials.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a screw conveyor for conveying asphalt pavement material based on visual inspection, comprising a screw conveyor body, a pair of supports fixedly connected to the outer wall of the discharge port of the screw conveyor body, each support being equipped with a visual inspection unit, a fixed platform below the screw conveyor body, a waste frame on the fixed platform, a sliding frame inclinedly provided on the fixed platform, both sides of the sliding frame being fixedly connected to the fixed platform via support legs, a telescopic plate provided inside the sliding frame, a side plate fixedly connected to the side wall of the telescopic plate, an upper electric telescopic cylinder fixedly connected to the bottom end of the sliding frame, the output end of the upper electric telescopic cylinder fixedly connected to the side wall of the side plate, the upper electric telescopic cylinder being electrically connected to the processing system of the visual inspection unit via a controller, a sliding plate being laterally slidably connected to the top of the fixed platform, and a replacement mechanism for automatically replacing the waste frame provided on the fixed platform.

[0008] In the above technical solution, the top of the telescopic plate is inclined, the front side of the fixed platform is inclined and fixedly connected to the discharge plate, and the top of the side plate is fixedly connected to the baffle.

[0009] In the above technical solution, the replacement mechanism further includes a replacement electric telescopic cylinder. A middle plate is fixedly connected to the inner side of the fixed platform. The replacement electric telescopic cylinder is fixedly connected to the bottom end of the middle plate. A push plate is provided on the middle plate. A groove adapted to the waste frame is opened on the push plate. The output end of the replacement electric telescopic cylinder passes through the top of the middle plate and is fixedly connected to the bottom of the push plate. A replacement slot for the waste frame to pass through is opened at the top of the fixed platform. A lower electric telescopic cylinder is fixedly connected to the top of the fixed platform. A discharge port is opened through the side wall of the slide plate. An L-shaped plate for pushing the waste frame is fixedly connected to the output end of the lower electric telescopic cylinder. A fixing mechanism for fixing the position of the waste frame is provided on the slide plate.

[0010] In the above technical solution, the fixing mechanism further includes a fixing plate, and a pair of fixing plates are provided. A sliding groove is opened through the side wall of the sliding plate. The fixing plates are slidably connected to both sides of the sliding groove. A through groove is opened on the side of the fixing plates that are close to each other. A limit block is slidably connected to the inner side of the through groove, and the bottom end of the limit block is inclined. A limit groove is opened on the outer wall of the waste frame relative to the position next to the limit block. A round rod is fixedly connected to the side of the fixing plate that is close to each other relative to the position inside the sliding groove. An extrusion block is fixedly connected to both sides of the outer wall of the L-shaped plate, and the front side of the extrusion block is inclined.

[0011] In the above technical solution, an upper spring is fixedly connected between the inner side of the through groove and the side wall of the limiting block, and the side of the round rod that is close to each other is set as a smooth arc surface, and a lower spring is fixedly connected between the inner side of the slide groove and the side wall of the fixing plate.

[0012] In the above technical solution, further, an L-shaped pull frame is slidably connected to the top of the fixed platform, a horizontal plate is fixedly connected to the side wall of the slide plate relative to the inner side of the pull frame, a slide rod is slidably connected through the horizontal plate, a release spring is fixedly connected between the outer wall of the slide rod and the bottom end of the horizontal plate, a release groove is opened at the top of the fixed platform relative to the side of the slide rod, a straight plate is fixedly connected to the top of the fixed platform relative to the side of the slide plate, a pair of return springs are fixedly connected between the side wall of the straight plate and the side wall of the slide plate, a movable plate is rotatably connected to the inner side of the pull frame, a guide roller is rotatably connected between the legs, and a pull rope is fixedly connected between the side wall of the pull frame and the side wall of the side plate, the pull rope passing under the guide roller.

[0013] In the above technical solution, a vertical plate is fixedly connected to the side wall of the pull frame, a limiting plate is fixedly connected to the top of the fixed platform relative to the side of the vertical plate, and the pull rope is provided through the side wall of the limiting plate. A reset spring is fixedly connected between the limiting plate and the side wall of the vertical plate.

[0014] In the above technical solution, the bottom end of the slide bar is further provided as a smooth arc surface, and the release groove is inclined on the side near the slide bar. The side wall of the moving plate is inclinedly fixedly connected to a positioning plate, and the top of the positioning plate abuts against the top of the inner end of the pull frame. The top of the fixed platform is fixedly connected to a positioning block relative to the position next to the slide plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This invention installs a high-precision visual inspection unit at the discharge port of the screw conveyor body to detect the mixed color of the discharged asphalt mixture, thereby more accurately determining whether it meets the paving requirements. When unqualified asphalt is detected, the system controls the upper electric telescopic cylinder to start, quickly extending the telescopic plate to catch the unqualified asphalt. Then, the upper electric telescopic cylinder is controlled to retract, and the caught unqualified asphalt is collected by sliding into the waste box through the material sliding frame for subsequent unified processing, thereby improving the production quality of asphalt.

[0017] 2. By setting up a replacement mechanism, the present invention can push out the full waste box and lift up the empty waste box after it is full, thereby realizing the box replacement operation of the device without the need for workers to be on duty for a long time, further improving the convenience of the device.

[0018] 3. The present invention, through the design of a pull frame, a sliding rod, and a return spring, enables the waste frame to slide while the upper electric telescopic cylinder pushes the telescopic plate out. Subsequently, through the design of the release groove, the pull frame is released when the sliding rod on the slide plate passes through the release groove. Then, under the elastic force of the return spring, the waste frame is pulled back to its original position, thereby quickly causing the waste frame to shake back and forth, ensuring that the collected waste asphalt material falls evenly into the waste frame, further improving the practical performance of the device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the screw conveyor of the present invention.

[0020] Figure 2 This is a rear-view perspective three-dimensional structural diagram of the fixed platform of the present invention;

[0021] Figure 3 Appendix of the present invention Figure 2 A magnified view of the structure at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the overall appearance structure of the telescopic plate of the present invention when it is extended;

[0023] Figure 5 This is a partial frontal perspective view of the fixed platform, sliding frame, and sliding plate of the present invention.

[0024] Figure 6 Appendix of the present invention Figure 5 A magnified schematic diagram of the structure at point B in the middle;

[0025] Figure 7 This is a full-section three-dimensional structural diagram of the front of the skateboard and fixing platform of the present invention;

[0026] Figure 8 Appendix of the present invention Figure 7 A magnified schematic diagram of the structure at point C in the middle;

[0027] Figure 9 This is a schematic diagram of the three-dimensional structure of the skateboard, fixing plate, and limiting block of the present invention.

[0028] In the diagram: 1. Screw conveyor body; 2. Support frame; 3. Vision inspection unit; 4. Fixed platform; 5. Waste box; 6. Sliding box; 7. Telescopic plate; 8. Side plate; 9. Upper electric telescopic cylinder; 10. Discharge plate; 11. Replacement electric telescopic cylinder; 12. Middle plate; 13. Push plate; 14. Slide plate; 15. Lower electric telescopic cylinder; 16. Discharge port; 17. L-shaped plate; 18. Fixed plate; 19. Limit block; 2 0. Limiting groove; 21. Round rod; 22. Extrusion block; 23. Upper spring; 24. Lower spring; 25. Pull frame; 26. Vertical plate; 27. Limiting plate; 28. Reset spring; 29. ​​Horizontal plate; 30. Slide rod; 31. Release spring; 32. Release groove; 33. Straight plate; 34. Return spring; 35. Moving plate; 36. Pull rope; 37. Guide roller; 38. Positioning plate; 39. Positioning block; 40. Baffle. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0031] In practical use, it has been found that traditional screw conveyors currently lack effective detection methods at the discharge port, making it impossible to conduct real-time and accurate detection of the discharged asphalt mixture. This means that asphalt mixtures that do not meet the requirements may directly enter the subsequent road paving stage. When the surface of the mixture is not evenly mixed with asphalt, it will seriously affect the paving quality of the asphalt pavement. To solve the above problems, the following structure was invented.

[0032] like Figures 1-9 The screw conveyor for conveying asphalt pavement material based on vision detection shown includes a screw conveyor body 1. A pair of supports 2 are fixedly connected to the outer wall of the discharge port of the screw conveyor body 1. Each support 2 is equipped with a vision detection unit 3. The vision detection unit 3 acquires images of asphalt mixture through a high-definition camera, and then analyzes the images using image processing software. The system identifies and distinguishes pixels of different colors based on a preset color threshold or a color model trained by a machine learning algorithm. For example, Otsu's method can be used to perform threshold segmentation on the image to divide the pixels in the image into two categories: asphalt and aggregate, thereby achieving color recognition and classification, and thus preventing the discharge of aggregates that are not mixed with asphalt.

[0033] A fixed platform 4 is provided below the screw conveyor body 1. A waste box 5 is provided on the fixed platform 4. A sliding box 6 is inclined on the fixed platform 4. Both sides of the sliding box 6 are fixedly connected to the fixed platform 4 by support legs. A telescopic plate 7 is provided inside the sliding box 6. A side plate 8 is fixedly connected to the side wall of the telescopic plate 7. An upper electric telescopic cylinder 9 is fixedly connected to the bottom end of the sliding box 6. The output end of the upper electric telescopic cylinder 9 is fixedly connected to the side wall of the side plate 8. The upper electric telescopic cylinder 9 is electrically connected to the processing system of the vision inspection unit 3 through a controller. A sliding plate 14 is laterally slidably connected to the top of the fixed platform 4. A replacement mechanism for automatically replacing the waste box 5 is provided on the fixed platform 4.

[0034] The top of the telescopic plate 7 is inclined to facilitate the asphalt to slide into the material box 6. The front side of the fixed platform 4 is inclined and fixedly connected to the discharge plate 10. The discharge plate 10 facilitates the sliding of the waste box 5 to a lower position. The top of the side plate 8 is fixedly connected to the baffle 40. The baffle 40 prevents the unqualified asphalt material caught by the telescopic plate 7 from falling when it retracts.

[0035] During the asphalt conveying process, the mixed asphalt material is discharged through the outlet of the screw conveyor body 1. During this process, the discharged asphalt material is visually inspected by the vision inspection unit 3. When unevenly mixed asphalt material is found, the controller will control the upper electric telescopic cylinder 9 to start and drive the telescopic plate 7 and side plate 8 to extend from the sliding frame 6. When the telescopic plate 7 is fully extended (it should be noted that the receiving position of the telescopic plate 7 needs to be a certain distance from the detection position of the vision inspection unit 3 to ensure that after the detection result is obtained, the controller can control the telescopic plate 7 to catch the unqualified asphalt material. This distance can be calculated), the unqualified asphalt material is caught. At this time, the asphalt material that falls around it will also fall onto the telescopic plate 7. This loss is within the range of asphalt material manufacturing loss.

[0036] Then, the electric telescopic cylinder 9 is controlled to drive the telescopic plate 7 to quickly reset. During this process, since the telescopic plate 7 is tilted, it will gradually slide down under the weight of the unqualified asphalt material itself, and then slide into the waste box 5 through the material sliding frame 6, thereby realizing the automatic removal of unqualified asphalt material.

[0037] In summary, through the design of the above structure, by installing a high-precision visual inspection unit 3 at the discharge port of the screw conveyor body 1, the mixed color of the discharged asphalt mixture is detected, thereby more accurately determining whether it meets the paving requirements. When unqualified asphalt is detected, the system controls the upper electric telescopic cylinder 9 to start, quickly extending the telescopic plate 7 to catch the unqualified asphalt. Then, the upper electric telescopic cylinder 9 is controlled to retract, and the caught unqualified asphalt will slide into the waste box 5 through the sliding frame 6 for collection, facilitating subsequent unified processing and thus improving the production quality of asphalt.

[0038] Based on the above embodiments, it was found during use that when the waste box 5 is full, workers need to climb up to replace it, which is quite troublesome. To solve the above problem, the above structure has been further improved.

[0039] The replacement mechanism includes a replacement electric telescopic cylinder 11. A middle plate 12 is fixedly connected to the inner side of the fixed platform 4. The replacement electric telescopic cylinder 11 is fixedly connected to the bottom end of the middle plate 12. A push plate 13 is provided on the middle plate 12. A groove adapted to the waste frame 5 is opened on the push plate 13. The output end of the replacement electric telescopic cylinder 11 passes through the top of the middle plate 12 and is fixedly connected to the bottom of the push plate 13. A replacement slot for the waste frame 5 to pass through is opened at the top of the fixed platform 4. A lower electric telescopic cylinder 15 is fixedly connected to the top of the fixed platform 4. A discharge port 16 is opened through the side wall of the slide plate 14. An L-shaped plate 17 for pushing the waste frame 5 is fixedly connected to the output end of the lower electric telescopic cylinder 15. It should be noted that the width of the discharge port 16 should be greater than the width of the L-shaped plate 17. Since the slide plate 14 is slidable, deviation should be avoided to prevent the L-shaped plate 17 from passing through normally. A fixing mechanism for fixing the position of the waste frame 5 is provided on the slide plate 14.

[0040] The fixing mechanism includes a fixing plate 18, which is provided in pairs. The side wall of the slide plate 14 is provided with a sliding groove. The fixing plates 18 are slidably connected to both sides of the sliding groove. The side of the fixing plates 18 that are close to each other is provided with a through groove. The inner side of the through groove is slidably connected with a limit block 19, and the bottom end of the limit block 19 is inclined. The outer wall of the waste frame 5 is provided with a limit groove 20 at a position next to the limit block 19. The side of the fixing plate 18 that is close to each other at a position inside the sliding groove is fixedly connected with a round rod 21. The outer walls of the L-shaped plate 17 are fixedly connected with extrusion blocks 22 at both sides, and the front side of the extrusion blocks 22 is inclined.

[0041] Upper springs 23 are fixedly connected between the inner side of the through groove and the side wall of the limiting block 19, and the side of the round rod 21 that is close to each other is set as a smooth arc surface. Lower springs 24 are fixedly connected between the inner side of the slide groove and the side wall of the fixing plate 18.

[0042] Once the waste collection box 5 is full, the electric telescopic cylinder 15 is activated to drive the L-shaped plate 17 deeper into the discharge port 16. This causes the extrusion block 22 to move into the chute, where the inclined surface of the extrusion block 22 presses against the arc surface of the round rod 21, causing the round rod 21 to gradually move to both sides. Simultaneously, the fixing plate 18 slides within the chute, compressing the spring 24. Consequently, the round rod 21 moves to the side wall of the extrusion block 22. During the sliding of the fixing plate 18, the limiting block 19 is activated. The L-shaped plate 17 slides out of the limiting groove 20 on the waste frame 5, thereby releasing the limitation on the waste frame 5. Then, the L-shaped plate 17 moves through the discharge port 16 to the side of the waste frame 5. Then, under the continued drive of the lower electric telescopic cylinder 15, the L-shaped plate 17 will push the waste frame 5 to slide on the fixed platform 4 (it should be noted that the uppermost waste frame 5 is flush with the top of the fixed platform 4). Then, the full waste frame 5 is pushed into the discharge plate 10, and then slides off the discharge plate 10 under its own weight.

[0043] Then, the lower electric telescopic cylinder 15 can be controlled to reset, and the above operation can be repeated in reverse. Under the elastic force of the lower spring 24, the fixed plate 18 is pushed to reset. Then, the replacement electric telescopic cylinder 11 is controlled to start and drive the push plate 13 to move upward, while simultaneously driving the stored empty waste frame 5 to move upward. During this process, the top of the waste frame 5 will press the inclined surface at the bottom of the limiting block 19, causing the limiting block 19 to slide into the through groove and compress the upper spring 23. Subsequently, when the limiting groove 20 on the waste frame 5 moves to the side of the limiting block 19, the compression on the limiting block 19 will be released. Then, under the elastic force of the upper spring 23, the limiting block 19 is pushed into the limiting groove 20, thereby restricting the position of the waste frame 5 and realizing the automatic frame changing of the device.

[0044] In summary, through the design of the above structure, after the waste box 5 is full, the full waste box 5 can be pushed out and the empty waste box 5 can be lifted up, thereby realizing the frame changing operation of the device. There is no need for workers to be on duty for a long time, which further improves the convenience of the device. At the same time, the replacement can be carried out without stopping the machine. During the replacement process, the asphalt material caught will slide into the waste box 5 below, avoiding affecting the normal operation of the device.

[0045] Based on the above embodiments, it was found during use that since the position between the waste frame 5 and the sliding frame 6 is fixed, the asphalt sliding from the sliding frame 6 will concentrate in one place inside the waste frame 5, affecting the collection effect of waste asphalt. To solve the above problem, the above structure has been further improved.

[0046] An L-shaped pull frame 25 is slidably connected to the top of the fixed platform 4. A horizontal plate 29 is fixedly connected to the side wall of the slide plate 14 relative to the inner side of the pull frame 25. A slide rod 30 is slidably connected through the horizontal plate 29. A release spring 31 is fixedly connected between the outer wall of the slide rod 30 and the bottom end of the horizontal plate 29. A release groove 32 is opened at the top of the fixed platform 4 relative to the side of the slide rod 30. A straight plate 33 is fixedly connected to the top of the fixed platform 4 relative to the side of the slide plate 14. A pair of return springs 34 are fixedly connected between the side wall of the straight plate 33 and the side wall of the slide plate 14. A moving plate 35 is rotatably connected to the inner side of the pull frame 25. A guide roller 37 is rotatably connected between the legs. A pull rope 36 is fixedly connected between the side wall of the pull frame 25 and the side wall of the side plate 8. The pull rope 36 passes under the guide roller 37.

[0047] A vertical plate 26 is fixedly connected to the side wall of the pull frame 25. A limit plate 27 is fixedly connected to the top of the fixed platform 4 relative to the side of the vertical plate 26. The pull rope 36 passes through the side wall of the limit plate 27. A return spring 28 is fixedly connected between the limit plate 27 and the side wall of the vertical plate 26.

[0048] The bottom end of the slide bar 30 is set as a smooth arc surface, and the release groove 32 is inclined on the side near the slide bar 30. The side wall of the moving plate 35 is inclined and fixedly connected to the positioning plate 38, and the top of the positioning plate 38 abuts against the top of the inner end of the pull frame 25. The top of the fixed platform 4 is fixedly connected to the positioning block 39 relative to the side of the slide plate 14. The positioning block 39 can limit the sliding position of the slide plate 14.

[0049] During the movement of the side plate 8 driven by the electric telescopic cylinder 9 under the control of the controller, the side plate 8 pulls the pull rope 36 to move, and then, under the guidance of the guide roller 37, pulls the pull frame 25 to slide on the fixed platform 4, thereby driving the moving plate 35 to move and gradually compressing the return spring 28. At this time, the moving plate 35 is located next to the slide rod 30. Since the moving plate 35 is inclined on one side and has a positioning plate 38, it will restrict the flipping position of the moving plate 35 towards the positioning plate 38, thereby pushing the slide rod 30 to move together, and driving the slide rod 30 through the cross plate 29. The slide 14 moves together, and the waste box 5 is fixed by the fixing mechanism on the slide 14. Therefore, the waste box 5 will move with the slide 14 (it should be noted that the slide 14 and the waste box 5 are both located inside the support legs and will not be obstructed). The return spring 34 is gradually stretched. Then, when the slide rod 30 moves above the release groove 32, it will be pushed by the elastic force of the release spring 31 to insert the bottom end of the slide rod 30 into the release groove 32, thereby causing the top end of the slide rod 30 to move away from the side of the moving plate 35, so that the slide 14 releases the push of the pull frame 25.

[0050] Subsequently, after the moving plate 35 is removed, the return spring 34 pulls the sliding plate 14 to reset. At this time, the sliding rod 30 is pulled out from the inclined surface of the release groove 32 and slides onto the fixed platform 4, compressing the release spring 31, thereby driving the waste frame 5 to move back and forth. This can shake the asphalt material collected in the waste frame 5, preventing the asphalt material from concentrating in one place and affecting the collection effect of the waste frame 5. It should be noted that the telescopic plate 7 can only effectively catch the unqualified asphalt after it extends to the end. Before the telescopic plate 7 extends to the end, the extension action is mainly in progress, and the shaking of the waste frame 5 has not yet occurred or is in the initial stage. Only when the telescopic plate 7 extends to the end, catches the unqualified asphalt and begins to reset will the waste frame 5 reset and shake. At the same time, the caught waste asphalt material will slide into the waste frame 5 through the sliding frame 6, so that the waste asphalt material falls evenly into the waste frame 5, achieving uniform distribution. The purpose of collecting asphalt material is to pull the rope 36 to drive the pull frame 25 to continue moving. After catching the asphalt material, the upper electric telescopic cylinder 9 drives the telescopic plate 7 and side plate 8 to reset. At this time, the pull on the rope 36 will be released. Under the elastic force of the reset spring 28, the pull frame 25 is pushed to reset. Then, when the moving plate 35 passes the top of the slide rod 30, since there is no restriction on the other side of the moving plate 35, when the moving plate 35 passes above the slide rod 30, it will be squeezed by the slide rod 30 and pushed to flip around the hinge. At the same time, it will drive the positioning plate 38 to flip. Then, when the moving plate 35 is removed from the slide rod 30, it will flip and reset under its own weight. (It should be noted that in order to ensure that the moving plate 35 can flip and reset under its own weight, the weight of the moving plate 35 must be greater than the weight of the positioning plate 38 to avoid the phenomenon that the bottom of the positioning plate 38 is facing down.)

[0051] In summary, through the design of the above structure, the waste frame 5 can be pulled to slide while the upper electric telescopic cylinder 9 pushes the telescopic plate 7 to extend. Subsequently, through the design of the release groove 32, the pull of the pull frame 25 can be released when the sliding rod 30 on the slide plate 14 is pulled through the release groove 32. Then, under the elastic force of the return spring 34, the waste frame 5 is pulled back to its original position, thereby quickly driving the waste frame 5 to shake back and forth, ensuring that the collected waste asphalt material falls evenly into the waste frame 5, further improving the practical performance of the device.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention.

[0053] Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A helical conveyor for conveying asphalt pavement material based on visual detection, comprising a helical conveyor body (1), characterized in that: The outer wall of the discharge port of the screw conveyor body (1) is fixedly connected with a pair of supports (2), the supports (2) are each provided with a visual detection unit (3), the lower portion of the screw conveyor body (1) is provided with a fixed table (4), the fixed table (4) is provided with a waste frame (5), the fixed table (4) is obliquely provided with a sliding frame (6), the sliding frame (6) is fixedly connected to the fixed table (4) on both sides through supporting legs, the inner side of the sliding frame (6) is provided with an expansion plate (7), the side wall of the expansion plate (7) is fixedly connected with a side plate (8), the bottom end of the sliding frame (6) is fixedly connected with an upper electric telescopic cylinder (9), the output end of the upper electric telescopic cylinder (9) is fixedly connected to the side wall of the side plate (8), the upper electric telescopic cylinder (9) is electrically connected between the controller and the processing system of the visual detection unit (3), the top end of the fixed table (4) is transversely and slidably connected with a sliding plate (14), the fixed table (4) is provided with a replacement mechanism for automatically replacing the waste frame (5); The replacement mechanism comprises a replacement electric telescopic cylinder (11), the inner side of the fixed table (4) is fixedly connected with a middle plate (12), the replacement electric telescopic cylinder (11) is fixedly connected to the bottom end of the middle plate (12), the middle plate (12) is provided with a push plate (13), the push plate (13) is provided with a groove matched with the waste frame (5), the output end of the replacement electric telescopic cylinder (11) penetrates through the top end of the middle plate (12) and is fixedly connected to the bottom of the push plate (13), the top end of the fixed table (4) is provided with a replacement groove for the waste frame (5) to pass through, the top end of the fixed table (4) is fixedly connected with a lower electric telescopic cylinder (15), the side wall of the sliding plate (14) is provided with a discharge port (16), the output end of the lower electric telescopic cylinder (15) is fixedly connected with an L-shaped plate (17) for pushing the waste frame (5), the sliding plate (14) is provided with a fixing mechanism for fixing the position of the waste frame (5); The fixing mechanism comprises a fixing plate (18), the fixing plate (18) is provided in pairs, the side wall of the sliding plate (14) is provided with a sliding groove, the fixing plates (18) are respectively and slidably connected on both sides of the sliding groove, the side of the fixing plate (18) close to each other is provided with a through groove, the inner side of the through groove is slidably connected with a limiting block (19), and the bottom end of the limiting block (19) is obliquely arranged, the outer wall of the waste frame (5) is provided with a limiting groove (20) beside the position of the limiting block (19), the side of the fixing plate (18) close to each other is fixedly connected with a round rod (21) relative to the position inside the sliding groove, the outer wall of the L-shaped plate (17) is fixedly connected with a pressing block (22) on both sides, and the front side of the pressing block (22) is obliquely arranged.

2. The helical conveyor for conveying asphalt pavement material based on visual detection according to claim 1, characterized in that: The top end of the expansion plate (7) is obliquely arranged, the front side of the fixed table (4) is obliquely and fixedly connected with a discharge plate (10), the top end of the side plate (8) is fixedly connected with a baffle (40).

3. The helical conveyor for conveying asphalt pavement material based on visual detection according to claim 1, characterized in that: The upper spring (23) is fixedly connected between the inner side of the through slot and the side wall of the limiting block (19), and the side close to the round rod (21) is provided as a smooth arc surface.

4. The helical conveyor for conveying asphalt pavement material based on visual detection according to claim 1, characterized in that: The L-shaped pull frame (25) is horizontally and slidably connected to the top end of the fixed table (4), the horizontal plate (29) is fixedly connected to the side wall of the sliding plate (14) relative to the inner side of the pull frame (25), the slide rod (30) is slidably connected through the horizontal plate (29), the release spring (31) is fixedly connected between the outer wall of the slide rod (30) and the bottom end of the horizontal plate (29), the release slot (32) is arranged at the top end of the fixed table (4) relative to the position beside the slide rod (30), the straight plate (33) is fixedly connected to the top end of the fixed table (4) relative to the position beside the sliding plate (14), the pair of return springs (34) are fixedly connected between the side wall of the straight plate (33) and the side wall of the sliding plate (14), the moving plate (35) is rotatably connected to the inner side of the pull frame (25), the guide roller (37) is rotatably connected between the two supporting legs, the pull rope (36) is fixedly connected between the side wall of the pull frame (25) and the side wall of the side plate (8), and the pull rope (36) passes through below the guide roller (37).

5. The helical conveyor for conveying asphalt pavement material based on visual detection according to claim 4, characterized in that: The vertical plate (26) is fixedly connected to the side wall of the pull frame (25), the limiting plate (27) is fixedly connected to the top end of the fixed table (4) relative to the position beside the vertical plate (26), the pull rope (36) passes through the side wall of the limiting plate (27), and the return spring (28) is fixedly connected between the limiting plate (27) and the vertical plate (26).

6. The helical conveyor for conveying asphalt pavement material based on visual detection according to claim 4, characterized in that: The bottom end of the slide rod (30) is provided as a smooth arc surface, the release slot (32) is arranged to be inclined relative to the side close to the slide rod (30), the positioning plate (38) is fixedly and inclinedly connected to the side wall of the moving plate (35), the top end of the positioning plate (38) abuts against the inner top end of the pull frame (25), and the positioning block (39) is fixedly connected to the top end of the fixed table (4) relative to the position beside the sliding plate (14).

Images