Screw conveyor for conveying asphalt pavement material based on visual inspection

Abstract

The invention relates to the technical field of asphalt conveying, in particular to an asphalt pavement material conveying screw conveyor based on visual inspection, which comprises a screw conveyor body, a pair of supports are fixedly connected to the outer wall of a discharge port of the screw conveyor body, visual inspection units are arranged on the supports, and a fixing table is arranged below the screw conveyor body. The high-precision visual detection unit is mounted at the discharge port of the screw conveyor body to detect the color of the discharged asphalt mixture, so that whether the asphalt mixture meets the laying requirement or not is judged more accurately, and when unqualified asphalt is found, the system controls the upper electric telescopic cylinder to start, so that the asphalt mixture is discharged, and the waste material frame is arranged on the fixed table. The telescopic plate is quickly stretched out, so that the unqualified asphalt is received, then the upper electric telescopic cylinder is controlled to retract, and meanwhile, the received unqualified asphalt slides into the waste material frame through the material sliding frame to be collected, so that subsequent unified treatment is facilitated, and the production quality of the asphalt is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt transportation, and in particular to a screw conveyor for transporting asphalt road surface materials based on visual detection. Background Art

[0002] The main function of a screw conveyor for asphalt pavement material is to efficiently and evenly transport asphalt mixture to a designated location. It is widely used in new construction and repair projects of asphalt pavements and is suitable for conveying various types of asphalt mixtures, including hot mix asphalt, warm mix asphalt, and mixtures containing recycled materials. The motor drives the screw shaft to rotate and transport the asphalt mixture from the feed port to the discharge port. During the conveying process, the blades on the screw shaft continuously stir and turn the material to ensure the uniformity of the mixture. At the same time, the heating device (such as a thermal oil pipe or surface burner) maintains the temperature of the mixture to prevent cooling that affects the construction performance.

[0003] At present, traditional screw conveyors lack effective detection methods at the discharge port and are unable to conduct real-time and accurate detection of the discharged asphalt mixture. This means that asphalt mixtures that do not meet the mixing requirements may directly enter the subsequent pavement paving process. When the asphalt is not evenly mixed on the surface of the mixture, it will seriously affect the paving quality of the asphalt pavement.

[0004] For example, if the asphalt content in the mixture is insufficient, the road surface will become loose and cracked during use. These problems will not only reduce the service life of the road and increase the subsequent maintenance costs, but may also pose a hidden danger to traffic safety.

[0005] Therefore, a screw conveyor for asphalt road material transportation based on visual inspection is proposed to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a screw conveyor for conveying asphalt road material based on visual detection.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is: a screw conveyor for conveying asphalt road material based on visual inspection, comprising a screw conveyor body, a pair of brackets fixedly connected to the outer wall of the discharge port of the screw conveyor body, each of the brackets being provided with a visual inspection unit, a fixed platform being provided under the screw conveyor body, a waste frame being provided on the fixed platform, a sliding frame being inclined on the fixed platform, both sides of the sliding frame being fixedly connected to the fixed platform by legs, a telescopic plate being provided on the inner side of the sliding frame, a side plate being fixedly connected to the side wall of the telescopic plate, an upper electric telescopic cylinder being fixedly connected to the bottom end of the sliding frame, an output end of the upper electric telescopic cylinder being 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 through a controller, a slide being connected to the top end of the fixed platform for horizontal sliding, and a replacement mechanism for automatically replacing the waste frame being provided on the fixed platform.

[0008] In the above technical solution, further, the top end of the telescopic plate is arranged at an angle, the front side of the fixed platform is fixedly connected with a discharge plate at an angle, and the top end of the side plate is fixedly connected with a baffle.

[0009] In the above technical solution, further, the replacement mechanism includes replacing the electric telescopic cylinder, a middle plate is fixedly connected to the inner side of the fixed table, 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 is provided on the push plate that is adapted to the waste frame, 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 groove is provided on the top of the fixed table for the waste frame to pass through, a lower electric telescopic cylinder is fixedly connected to the top of the fixed table, a unloading port is provided through the side wall of the slide, the output end of the lower electric telescopic cylinder is fixedly connected to an L-shaped plate for pushing the waste frame, and a fixing mechanism for fixing the position of the waste frame is provided on the slide.

[0010] In the above technical solution, further, the fixing mechanism includes a fixing plate, and the fixing plate is provided with a pair. The side walls of the slide plate are penetrated with a sliding groove, and the fixing plates are slidably connected to both sides of the sliding groove. The fixed plates are provided with a through groove on the side close to each other, and the inner sides of the through grooves are slidably connected to the limiting blocks, and the bottom ends of the limiting blocks are tilted. The outer walls of the waste frame are provided with limiting grooves relative to the positions next to the limiting blocks, and the fixed plates are fixedly connected with round rods on the side close to each other relative to the positions in the sliding groove. Extrusion blocks are fixedly connected on both sides of the outer wall of the L-shaped plate, and the front sides of the extrusion blocks are tilted.

[0011] In the above technical solution, further, an upper spring is fixedly connected between the inner side of the through groove and the side wall of the limit block, and the side close to the round rod 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 fixed plate.

[0012] In the above technical solution, further, the top end of the fixed platform is connected to an L-shaped pull frame for horizontal sliding sliding, the side wall of the slide is fixedly connected to a horizontal plate relative to the inner position of the pull frame, a sliding rod is passed through the horizontal plate for sliding connection, 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 provided at the top end of the fixed platform relative to the position next to the slide rod, a straight plate is fixedly connected to the top end of the fixed platform relative to the position next to the slide, a pair of return springs are fixedly connected between the side walls of the straight plate and the side walls of the slide, a movable plate is rotatably connected to the inner side of the pull frame, guide rollers are rotatably connected between the legs, a pull rope is fixedly connected between the side walls of the pull frame and the side walls of the side plate, and the pull rope passes from under the guide roller.

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

[0014] In the above technical solution, further, the bottom end of the slide rod is set to a smooth arc surface, and the release groove is inclined near one side of the slide rod, the side wall of the movable plate is inclined and fixedly connected with a positioning plate, and the top of the positioning plate is against the top of the pull frame, and the top of the fixed platform is fixedly connected with a positioning block relative to the position next to the slide.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present 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 judging whether it meets the paving requirements. When unqualified asphalt is found, the system controls the upper electric telescopic cylinder to start and quickly extend the telescopic plate to catch the unqualified asphalt. Then the upper electric telescopic cylinder is controlled to retract. At the same time, the caught unqualified asphalt will slide into the waste frame through the sliding frame for collection, which is convenient for subsequent unified processing, thereby improving the production quality of asphalt.

[0016] 2. The present invention adopts the setting of the replacement mechanism, which can push out the full waste frame and lift up the empty waste frame after the waste frame is full, thereby realizing the frame replacement operation of the device, eliminating the need for workers to be on duty for a long time, and further improving the convenience of the device.

[0017] 3. The present invention, through the arrangement of structures such as a pull frame, a slide rod and a return spring, can pull the waste frame to slide when the upper electric telescopic cylinder pushes the telescopic plate to extend. Subsequently, through the design of a release groove, the pull of the pull frame can be released when the slide rod on the pull plate passes through the release groove, and then the waste frame is pulled back to its original position under the elastic force of the return spring, thereby quickly driving the waste frame to swing back and forth, ensuring that the collected waste asphalt material falls evenly into the waste frame, further improving the practical performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the front three-dimensional structure of the screw conveyor of the present invention; Figure 2 It is a rear perspective structural diagram of the fixing platform of the present invention; Figure 3 The appended Figure 2 A schematic diagram of the partially enlarged structure at center A; Figure 4 This is a schematic diagram of the overall appearance structure of the telescopic plate of the present invention when it is extended; Figure 5 It is a schematic diagram of the partial front three-dimensional structure of the fixing platform, the sliding frame and the sliding plate of the present invention; Figure 6 The appended Figure 5 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 7 This is a schematic diagram of the front full-section three-dimensional structure of the slide plate and the fixing platform of the present invention; Figure 8 The appended Figure 7 A schematic diagram of the partially enlarged structure at point C in the middle; Figure 9 It is a schematic diagram of the three-dimensional structure of the sliding plate, the fixing plate and the limiting block separated from each other according to the present invention.

[0019] Figure: 1. Screw conveyor body; 2. Bracket; 3. Visual inspection unit; 4. Fixed platform; 5. Waste frame; 6. Slide frame; 7. Telescopic plate; 8. Side plate; 9. Upper electric telescopic cylinder; 10. Discharge plate; 11. Replacement of 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. Return spring; 29. ​​Horizontal plate; 30. Sliding 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 DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0022] In actual use, it was found that at present, traditional screw conveyors lack effective detection means at the discharge port and cannot perform real-time and accurate detection of the discharged asphalt mixture. This means that asphalt mixture that does not meet the mixing requirements may directly enter the subsequent pavement paving process. When the asphalt is not evenly mixed on the surface of the mixture, it will seriously affect the paving quality of the asphalt pavement. In order to solve the above problems, the following structure is specially invented.

[0023] like Figures 1-9 The illustrated visual inspection-based screw conveyor for conveying asphalt road material comprises a screw conveyor body 1. A pair of brackets 2 are fixedly connected to the outer wall of the discharge port of the screw conveyor body 1. Each bracket 2 is provided with a visual inspection unit 3. The visual inspection unit 3 captures an image of the asphalt mixture using a high-definition camera and then analyzes the image using image processing software. The system identifies and distinguishes pixels of different colors based on a preset color threshold or a color model trained using a machine learning algorithm. For example, the Otsu's method can be used to perform threshold segmentation on the image, dividing the pixels in the image into two categories: asphalt and aggregate, thereby achieving color recognition and classification, and thus preventing the discharge of stone materials that have not been mixed with asphalt. A fixed platform 4 is provided below the screw conveyor body 1, on which a waste frame 5 is provided, and a sliding frame 6 is provided obliquely on the fixed platform 4. Both sides of the sliding frame 6 are fixedly connected to the fixed platform 4 by legs, and a telescopic plate 7 is provided on the inner side of the sliding frame 6. The side walls of the telescopic plate 7 are fixedly connected to the side plates 8. The bottom end of the sliding frame 6 is fixedly connected to an upper electric telescopic cylinder 9, and the output end of the upper electric telescopic cylinder 9 is fixedly connected to the side walls of the side plates 8. The upper electric telescopic cylinder 9 is electrically connected to the processing system of the visual inspection unit 3 through the controller. A slide plate 14 is connected to the top of the fixed platform 4 for horizontal sliding. A replacement mechanism for automatically replacing the waste frame 5 is provided on the fixed platform 4; The top of the telescopic plate 7 is tilted to facilitate the asphalt caught to slide onto the sliding frame 6. The front side of the fixed platform 4 is tilted and fixedly connected to the discharge plate 10. Through the setting of the discharge plate 10, the waste frame 5 pushed out can slide to a lower place. The top of the side plate 8 is fixedly connected to the baffle 40. The setting of the baffle 40 prevents the unqualified asphalt caught from falling when the telescopic plate 7 is retracted. During the asphalt transportation process, the mixed asphalt is discharged through the discharge port of the screw conveyor body 1. During this process, the discharged asphalt is visually inspected by the visual inspection unit 3. Then, when it is found that the asphalt is not evenly mixed, the controller will control the upper electric telescopic cylinder 9 to start and drive the telescopic plate 7 and the 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 at a certain distance from the detection position of the visual inspection unit 3 to ensure that the controller can control the telescopic plate 7 to catch the unqualified asphalt after the detection result comes out, and this distance can be calculated), the unqualified asphalt is caught. At this time, the asphalt that falls around will also fall onto the telescopic plate 7. This loss is within the range of asphalt manufacturing loss. 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 inclined, the unqualified asphalt material will gradually slide downward under its own gravity, and then slide into the waste frame 5 through the sliding frame 6, thereby realizing the automatic removal of the unqualified asphalt material.

[0024] To sum up, 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, so as to more accurately judge whether it meets the paving requirements, and when unqualified asphalt is found, the system controls the electric telescopic cylinder 9 to start, quickly extends the telescopic plate 7, and thus catches the unqualified asphalt, and then controls the electric telescopic cylinder 9 to retract. At the same time, the caught unqualified asphalt will slide into the waste frame 5 through the sliding frame 6 for collection, which is convenient for subsequent unified processing, thereby improving the production quality of asphalt.

[0025] On the basis of the above embodiment, it was found during use that when the waste frame 5 was full, workers had to climb up to replace it, which was quite troublesome. In order to solve the above problem, the above structure was further improved.

[0026] The replacement mechanism includes replacing the electric telescopic cylinder 11, the inner side of the fixed platform 4 is fixedly connected to the 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 adapted to the waste frame 5, 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, the top of the fixed platform 4 is provided with a replacement slot for the waste frame 5 to pass through, the top of the fixed platform 4 is fixedly connected with a lower electric telescopic cylinder 15, the side wall of the slide plate 14 is penetrated by 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. It should be noted here that the width of the discharge port 16 needs to be greater than the width of the L-shaped plate 17. Since the slide plate 14 is slidable, deviation is avoided to affect the normal passage of the L-shaped plate 17. A fixing mechanism for fixing the position of the waste frame 5 is provided on the slide plate 14; The fixing mechanism includes a fixing plate 18, which is provided with a pair of fixing plates 18. A slide groove is provided through the side wall of the slide plate 14. The fixing plates 18 are slidably connected to both sides of the slide groove. A through groove is provided on the side close to the fixing plate 18. The inner side of the through groove is slidably connected to a limiting block 19, and the bottom end of the limiting block 19 is tilted. The outer wall of the waste frame 5 is provided with a limiting groove 20 relative to the position next to the limiting block 19. A round rod 21 is fixedly connected to the side of the fixing plate 18 relative to the position in the slide groove. Extrusion blocks 22 are fixedly connected to both sides of the outer wall of the L-shaped plate 17, and the front sides of the extrusion blocks 22 are tilted. An upper spring 23 is fixedly connected between the inner side of the through slot and the side wall of the limit block 19, and the side close to the round rod 21 is set to a smooth arc surface, and a lower spring 24 is fixedly connected between the inner side of the slide slot and the side wall of the fixed plate 18; When the waste frame 5 is full, the electric telescopic cylinder 15 is controlled to start and drive the L-shaped plate 17 to go deep into the discharge port 16. At this time, the extrusion block 22 is driven to move into the chute, and then the arc surface of the round rod 21 is squeezed by the inclined surface of the extrusion block 22, so that the round rod 21 is squeezed to gradually move to both sides, and at the same time, the fixed plate 18 is driven to slide in the chute and compress the lower spring 24. Then the round rod 21 moves to the side wall of the extrusion block 22, and during the sliding process of the fixed plate 18, the limit block 19 is driven. The waste frame 5 slides out of the limiting groove 20 on the waste frame 5, thereby releasing the limit of the waste frame 5. Then, the L-shaped plate 17 passes through the discharge port 16 and moves to the side of the waste frame 5. Then, under the continued driving of the lower electric telescopic cylinder 15, the L-shaped plate 17 pushes 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 onto the discharge plate 10, and then slides off the discharge plate 10 under the weight of the waste frame 5 itself. 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, and then the replacement electric telescopic cylinder 11 is controlled to start and drive the push plate 13 to move upward, and at the same time drive the stored empty waste frame 5 to move upward. During this process, the top of the waste frame 5 will squeeze the inclined surface of the bottom end of the limit block 19, so that the limit block 19 slides into the through groove and compresses the upper spring 23. Subsequently, when the limit groove 20 on the waste frame 5 moves to the side of the limit block 19, the squeeze on the limit block 19 will be released, and then under the elastic force of the upper spring 23, the limit block 19 is pushed to be stuck in the limit groove 20, thereby limiting the position of the waste frame 5, thereby realizing automatic frame changing of the device.

[0027] To sum up, through the design of the above structure, after the waste frame 5 is full, the full waste frame 5 can be pushed out and the empty waste frame 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, replacement can be carried out without stopping the machine. During the replacement process, the received asphalt material will slide into the waste frame 5 below to avoid affecting the normal operation of the device.

[0028] On the basis of the above embodiment, 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 be concentrated in one place inside the waste frame 5, affecting the collection effect of the waste asphalt. In order to solve the above problem, the above structure was further improved.

[0029] The top of the fixed platform 4 is connected to an L-shaped pull frame 25 for transverse sliding sliding. The side wall of the slide plate 14 is fixedly connected to a horizontal plate 29 relative to the inner position of the pull frame 25. A slide rod 30 is slidably connected to 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 provided at the top of the fixed platform 4 relative to the position next to the slide rod 30. The top of the fixed platform 4 is fixedly connected to a straight plate 33 relative to the position next to the slide plate 14. A pair of return springs 34 are fixedly connected between the side walls of the straight plate 33 and the side walls of the slide plate 14. A movable plate 35 is rotatably connected to the inner side of the pull frame 25. Guide rollers 37 are rotatably connected between the legs. A pull rope 36 is fixedly connected between the side walls of the pull frame 25 and the side walls of the side plate 8, and the pull rope 36 passes under the guide roller 37. The side wall of the pull frame 25 is fixedly connected to a vertical plate 26, the top of the fixed platform 4 is fixedly connected to a limit plate 27 relative to the position next to the vertical plate 26, and the pull rope 36 is set through the side wall of the limit plate 27, and a return spring 28 is fixedly connected between the limit plate 27 and the side wall of the vertical plate 26; The bottom end of the slide bar 30 is set to a smooth arc surface, and the release groove 32 is inclined near the side of the slide bar 30. The side wall of the movable plate 35 is fixedly connected to a positioning plate 38, and the top of the positioning plate 38 is against the top of the pull frame 25. The top of the fixed platform 4 is fixedly connected to a positioning block 39 relative to the position next to the slide plate 14. The positioning block 39 can limit the sliding position of the slide plate 14. When the electric telescopic cylinder 9 drives the side plate 8 to move under the control of the controller, the side plate 8 will pull the pull rope 36 to move, and then pull the pull frame 25 to slide on the fixed platform 4 under the guidance of the guide roller 37, and at the same time drive the movable plate 35 to move, and gradually compress the return spring 28. At this time, the movable plate 35 is located next to the slide rod 30. Since a positioning plate 38 is provided on one side of the movable plate 35, the flip position of the movable plate 35 to the side of the positioning plate 38 is restricted, thereby pushing the slide rod 30 to move together, and driving the slide through the cross plate 29. The plate 14 moves together, and the waste frame 5 is fixed by the fixing mechanism on the slide plate 14, so the waste frame 5 moves with the slide plate 14 (it should be noted that the slide plate 14 and the waste frame 5 are both located in the support legs and will not be hindered), and gradually stretch the return spring 34. Then, when the slide bar 30 moves above the release groove 32, the elastic force of the release spring 31 pushes the bottom end of the slide bar 30 into the release groove 32, and then the top end of the slide bar 30 moves away from the moving plate 35, so that the slide plate 14 releases the pushing force of the pull frame 25; Then, after the movable plate 35 moves away, the slide plate 14 will be pulled back to its original position under the elastic force of the return spring 34. At this time, the slide bar 30 will be pulled out from the inclined surface of the release groove 32 and slide onto the fixed platform 4, and the release spring 31 will be compressed, thereby driving the waste frame 5 to move back and forth, which can shake the asphalt material collected in the waste frame 5 to prevent the asphalt material from being concentrated in one place and affecting the collection effect of the waste frame 5. It should be noted here that the telescopic plate 7 can only effectively catch unqualified asphalt after it is extended into place. Before the telescopic plate 7 is extended into place, the main extension action is 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 is extended into place, catches the unqualified asphalt and starts to reset, the waste frame 5 will reset and shake. At the same time, the caught waste asphalt will slide into the waste frame 5 through the sliding frame 6, so that the waste asphalt falls evenly in the waste frame 5, achieving uniform The purpose of collecting asphalt material is then that the pull rope 36 drives the pull frame 25 to continue moving. After catching the asphalt material, the upper electric telescopic cylinder 9 drives the telescopic plate 7 and the side plate 8 to reset. At this time, the pull on the pull rope 36 will be released, and the pull frame 25 will be pushed to reset under the elastic force of the reset spring 28. Subsequently, when the moving plate 35 passes the top of the slide bar 30, since there is no restriction on the other side of the moving plate 35, when the moving plate 35 passes over the slide bar 30, it will be squeezed by the slide bar 30 to push the moving plate 35 to flip around the hinge, and at the same time drive the positioning plate 38 to flip, and then when the moving plate 35 moves away from the slide bar 30, it will flip and reset under its own gravity (it should be noted here that in order to ensure that the moving plate 35 can flip and reset under its own gravity, the weight of the moving plate 35 must be greater than the weight of the positioning plate 38 to avoid the bottom end of the positioning plate 38 facing down).

[0030] To sum up, through the design of the above structure, the waste frame 5 can be pulled to slide in the process of the upper electric telescopic cylinder 9 pushing the telescopic plate 7 to extend, and then through the design of the release groove 32, the pull of the pull frame 25 can be released when the pull frame 25 pulls the slide bar 30 on the slide plate 14 to pass through the release groove 32, and then the waste frame 5 is pulled back to its original position under the elastic force of the return spring 34, thereby quickly driving the waste frame 5 to swing back and forth, ensuring that the collected waste asphalt material falls evenly in the waste frame 5, further improving the practical performance of the device.

[0031] The basic principles, main features and advantages of the present invention are shown and described above.

[0032] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and the specification only describe the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. These changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A screw conveyor for conveying asphalt road surface material based on visual inspection, comprising a screw conveyor body (1), characterized in that: A pair of brackets (2) are fixedly connected to the outer wall of the discharge port of the screw conveyor body (1), and a visual detection unit (3) is provided on each of the brackets (2). A fixed platform (4) is provided below the screw conveyor body (1), and a waste frame (5) is provided on the fixed platform (4). A sliding frame (6) is tilted on the fixed platform (4), and both sides of the sliding frame (6) are fixedly connected to the fixed platform (4) through legs. A telescopic plate (7) is provided on the inner side of the sliding frame (6), and the side wall of the telescopic plate (7) is fixedly connected to a side plate (8). The bottom end of the sliding frame (6) is fixedly connected to an upper electric telescopic cylinder (9), and 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 visual detection unit (3) through a controller. A slide plate (14) is laterally slidably connected to the top of the fixed platform (4), and a replacement mechanism for automatically replacing the waste frame (5) is provided on the fixed platform (4).

2. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 1 is characterized in that: The top end of the telescopic plate (7) is arranged at an angle, the front side of the fixed platform (4) is fixedly connected to a discharge plate (10) at an angle, and the top end of the side plate (8) is fixedly connected to a baffle (40).

3. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 1 is characterized in that: 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), and a groove adapted to the waste frame (5) is provided on the push plate (13), the output end of the replacement electric telescopic cylinder (11) passes through the top end of the middle plate (12) and is fixedly connected to the bottom end of the push plate (13), the top end of the fixed platform (4) is provided with a replacement groove for the waste frame (5) to pass through, the top end of the fixed platform (4) is fixedly connected to a lower electric telescopic cylinder (15), a side wall of the slide plate (14) is provided with a discharge port (16), the output end of the lower electric telescopic cylinder (15) is fixedly connected to an L-shaped plate (17) for pushing the waste frame (5), and the slide plate (14) is provided with a fixing mechanism for fixing the position of the waste frame (5).

4. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 3 is characterized in that: The fixing mechanism includes a fixing plate (18), a pair of the fixing plates (18) are provided, a sliding groove is provided through the side wall of the slide plate (14), and the fixing plates (18) are slidably connected to both sides of the sliding groove. A through groove is provided on the side of the fixing plate (18) close to each other, and a limiting block (19) is slidably connected to the inner side of the through groove, and the bottom end of the limiting block (19) is tilted. A limiting groove (20) is provided on the outer wall of the waste frame (5) relative to the position next to the limiting block (19), and a round rod (21) is fixedly connected to the side of the fixing plate (18) close to each other relative to the position in the sliding groove. An extrusion block (22) is fixedly connected to both sides of the outer wall of the L-shaped plate (17), and the front side of the extrusion block (22) is tilted.

5. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 4 is characterized in that: An upper spring (23) is fixedly connected between the inner side of the through groove and the side wall of the limit block (19), and the side of the round rod (21) close to it is set as a smooth arc surface, and a lower spring (24) is fixedly connected between the inner side of the slide groove and the side wall of the fixed plate (18).

6. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 1, characterized in that: The top of the fixed platform (4) is connected to an L-shaped pull frame (25) in a transverse sliding manner, the side wall of the slide plate (14) is fixedly connected to a transverse plate (29) relative to the inner position of the pull frame (25), the transverse plate (29) is slidably connected to a slide rod (30), and a release spring (31) is fixedly connected between the outer wall of the slide rod (30) and the bottom end of the transverse plate (29), the top of the fixed platform (4) is provided with a release groove (32) relative to the position next to the slide rod (30), the top of the fixed platform (4) is fixedly connected to a straight plate (33) relative to the position next to 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), the inner side of the pull frame (25) is rotatably connected to a movable plate (35), the legs are rotatably connected to a guide roller (37), the side wall of the pull frame (25) is fixedly connected to the side wall of the side plate (8), and the pull rope (36) passes under the guide roller (37).

7. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 6, characterized in that: The side wall of the pull frame (25) is fixedly connected to a vertical plate (26), the top of the fixed platform (4) is fixedly connected to a limit plate (27) at a position next to the vertical plate (26), and the pull rope (36) passes through the side wall of the limit plate (27), and a return spring (28) is fixedly connected between the limit plate (27) and the side wall of the vertical plate (26).

8. The screw conveyor for conveying asphalt pavement material based on visual inspection according to claim 6, characterized in that: The bottom end of the slide bar (30) is set to a smooth arc surface, and the release groove (32) is inclined near the side of the slide bar (30). The side wall of the movable plate (35) is fixedly connected with a positioning plate (38) at an angle, and the top end of the positioning plate (38) is against the top end of the pull frame (25). The top end of the fixed platform (4) is fixedly connected with a positioning block (39) relative to the position next to the slide plate (14).

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