Reverse spiral material returning device for preventing longitudinal segregation of paver
Through the design of the reverse spiral return device, the asphalt mixture is pushed into the gully using baffles and guide plates, and the remixing of coarse and fine aggregates is achieved through the rotation of the spiral feeder and the action of the reverse spiral return device, solving the problem of longitudinal segregation of the asphalt paver and improving the paving quality.
Patent Information
- Application Number
- CN202510986977.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2025-09-23
AI Technical Summary
Existing technologies cannot effectively prevent the longitudinal segregation problem that occurs during the paving process of asphalt pavers, especially the stratification of coarse and fine aggregates, which leads to uneven paving of the asphalt pavement.
The reverse spiral return device is used to push the scattered asphalt mixture into the gully through the baffle and guide plate, and the rotation of the spiral feeder is used to transport and mix it horizontally. The reverse spiral return device is combined to lift the sinking coarse aggregate to achieve re-mixing of coarse and fine aggregates and ensure uniform distribution.
It effectively prevents the sedimentation and stratification of coarse aggregate during asphalt pavement paving, ensures the uniform paving of asphalt mixture, solves the problem of longitudinal segregation, and improves the paving quality.
Smart Images
Figure CN120683765A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of paving machines, in particular to a reverse spiral material return device for preventing longitudinal segregation of a paving machine. Background Art
[0002] Asphalt mixture paving is a key step in asphalt pavement construction. Typically, an asphalt paver is used to evenly spread hot-mix asphalt on the road surface to a specific width and thickness. High quality and uniformity are crucial to prevent segregation. The paver's paving speed is typically controlled between 2 and 6 m / min, maintaining continuous and uniform operation without pauses or sudden speed changes. The spiral feeder must rotate continuously, and the asphalt mixture height on both sides must be no less than two-thirds of the feeder to prevent segregation.
[0003] In the prior art, in order to prevent vertical segregation of asphalt pavers during the paving process, existing measures mainly include adding iron chains or rubber sheets under the front baffle of the screw feeder to block the coarse aggregate from rolling and scattering, so that it can be remixed with the fine aggregate subsequently transported by the screw feeder, thereby preventing vertical segregation near the two ends of the screw feeder.
[0004] However, the existing measures are not ideal in actual implementation and still cannot avoid the problem of vertical segregation during asphalt pavement paving. The main reason is that the iron chains or rubber sheets only play the role of preventing the scattering of coarse aggregates, but the coarse aggregates will still sink to the bottom, causing the fine aggregates and coarse aggregates to be separated, and the uniform distribution of the coarse and fine aggregates after remixing cannot be achieved. Summary of the Invention
[0005] The object of the present invention is to provide a reverse spiral material return device for preventing longitudinal segregation of a paver, so as to solve the problems raised in the above-mentioned background technology.
[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an anti-spiral return device for preventing longitudinal segregation of a paver, comprising: a baffle, a first side plate fixed to one end of the baffle, a second side plate fixed to the other end of the baffle, a movable side plate slidably connected to the baffle, a first guide plate fixed to the first side plate, a second guide plate fixed to the movable side plate, one end of a spiral feeder rotatably connected to the first side plate, a rotating shaft movably installed at the other end of the spiral feeder, an axis hole provided on the movable side plate, the rotating shaft rotatably connected in the axis hole, a second slider movably connected to the first side plate and the second side plate, and an anti-spiral return device rotatably connected between the two groups of second sliders.
[0007] Preferably, the first side panel and the second side panel are both provided with a first slide rail, a first slider is connected to the first slide rail for sliding up and down, the first slide rail is a rectangular trough, and the first slider is a rectangular block structure.
[0008] Preferably, a second slide rail is provided on the first slide block, the second slide block is slidably connected to the second slide rail in the horizontal direction, the second slide rail is a rectangular trough, and the second slide block is a rectangular block structure.
[0009] Preferably, a guide groove is provided on the first sliding block, and a guide block is fixed to the bottom end of the second sliding block, and the guide block is slidably connected in the guide groove.
[0010] Preferably, a limiting groove is provided on the first slider, a limiting component mounting rod is fixed on the guide block, the limiting component mounting rod is an "L"-shaped plate structure, a limiting screw hole is provided on the limiting component mounting rod, a limiting screw is installed in the limiting screw hole through a threaded connection, one end of the limiting screw is fixed to the limiting rod, and the limiting rod is against the first slider.
[0011] Preferably, a second screw hole is provided on each of the first side plate and the second side plate, the second screw hole is connected to the first slide rail, a second screw rod is installed in the second screw hole through a threaded connection, and the bottom end of the second screw rod is rotatably connected to the top end of the first slider.
[0012] Preferably, a guide rod is fixed between the first side panel and the second side panel, a guide hole is provided on the movable side panel, the guide rod is movably inserted in the guide hole, the guide rod is a round rod structure, the guide hole is a round hole structure, a first screw hole is provided on the movable side panel, one end of the first screw is rotatably connected to the first side panel, the other end of the first screw is rotatably connected to the second side panel, and a threaded connection is provided between the first screw and the first screw hole.
[0013] Preferably, a plug-in slot is provided on the screw feeder, a plug-in block is fixed on the rotating shaft, the plug-in block is movably plugged into the plug-in slot, and the plug-in block and the plug-in slot are installed by cooperating with screw holes.
[0014] Preferably, a screw feeder extension rod is movably mounted on the baffle, one end of the screw feeder extension rod is provided with a mounting groove, and the other end of the screw feeder extension rod is fixed with a mounting block.
[0015] Preferably, a mounting rod and a mounting plate are fixed on the baffle, the mounting rod is an "L"-shaped rod structure, the other end of the mounting rod is movably inserted into the mounting slot, and the mounting block is mounted on the mounting plate through screw holes.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] The reverse spiral return device proposed in the present invention prevents longitudinal segregation of the paver, fills asphalt coarse aggregate and fine aggregate in the grooves of the road, installs the baffle on the loader, adjusts the spacing between the first side plate and the movable side plate, and makes the distance between the first side plate and the second side plate equal to the grooves of the road. The motor drives the spiral feeder to rotate. During the process of the loader pushing the baffle forward, the first guide plate and the second guide plate push the asphalt scattered outside the groove into the groove. Under the rotation of the spiral feeder, the asphalt mixed aggregate that was originally randomly piled up and uneven is transported horizontally, so that the mixed aggregate is paved. As the baffle continues to move forward, the reverse spiral return device lifts the coarse aggregate that has sunk to the bottom, and mixes the coarse aggregate and fine aggregate again, so that the asphalt mixed aggregate is more uniform, avoiding the deposition and stratification of coarse aggregate during asphalt pavement paving, and solving the problem of vertical segregation during asphalt pavement paving. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the structure of the present invention;
[0019] Figure 2 This is a schematic diagram of the screw feeder extension rod structure;
[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;
[0021] Figure 4 for Figure 3 A schematic diagram of the structure at center A;
[0022] Figure 5 Schematic diagram of the cross-sectional structure of the guide hole;
[0023] Figure 6 Schematic diagram of the cross-sectional structure of the shaft hole;
[0024] Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle;
[0025] Figure 8 This is a schematic diagram of the cross-sectional structure of the screw feeder extension rod;
[0026] Figure 9 for Figure 8 A magnified schematic diagram of the structure at point C in the middle;
[0027] Figure 10 for Figure 8 Enlarged schematic diagram of the structure at point D in the middle.
[0028] In the figure: baffle 1, first side plate 2, second side plate 3, movable side plate 4, first guide plate 5, second guide plate 6, screw feeder 7, first slide rail 8, first slider 9, second slide rail 10, second slider 11, anti-spiral return device 12, guide groove 13, guide block 14, limit groove 15, limit assembly mounting rod 16, limit screw hole 17, limit screw 18, limit rod 19, guide rod 20, guide hole 21, first screw hole 22, first screw rod 23, second screw hole 24, second screw 25, screw feeder extension rod 26, rotating shaft 27, shaft hole 28, plug-in slot 29, plug-in block 30, mounting rod 31, mounting slot 32, mounting block 33, mounting plate 34. DETAILED DESCRIPTION
[0029] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0030] Example 1: Please refer to Figures 1 to 10 The present invention provides a technical solution: an anti-spiral return device for preventing longitudinal segregation of a paver, comprising: a baffle 1, a first side plate 2 being fixed at one end of the baffle 1, a second side plate 3 being fixed at the other end of the baffle 1, a movable side plate 4 being slidably connected to the baffle 1, a first guide plate 5 being fixed on the first side plate 2, a second guide plate 6 being fixed on the movable side plate 4, one end of a spiral feeder 7 being rotatably connected to the first side plate 2, a rotating shaft 27 being movably installed at the other end of the spiral feeder 7, a shaft hole 28 being opened on the movable side plate 4, the rotating shaft 27 being rotatably connected in the shaft hole 28, a second slider 11 being movably connected to the first side plate 2 and the second side plate 3, and an anti-spiral return device 12 being rotatably connected between the two groups of second sliders 11.
[0031] During actual use, asphalt coarse aggregate and fine aggregate are filled in the grooves of the road, the baffle 1 is installed on the loader, and the spacing between the first side plate 2 and the movable side plate 4 is adjusted so that the distance between the first side plate 2 and the second side plate 3 is equal to the groove of the road. The motor drives the screw feeder 7 to rotate. During the process of the loader pushing the baffle 1 forward, the first guide plate 5 and the second guide plate 6 push the asphalt scattered outside the groove into the groove. Under the rotation of the screw feeder 7, the asphalt mixed aggregate that was originally randomly piled up and uneven is transported horizontally, so that the mixed aggregate is paved. As the baffle 1 continues to move forward, the anti-spiral return feeder 12 lifts the coarse aggregate that has sunk to the bottom, and mixes the coarse aggregate and fine aggregate again, so that the asphalt mixed aggregate is more uniform, avoiding the deposition and stratification of coarse aggregate during asphalt pavement paving, and solving the problem of vertical segregation during asphalt pavement paving.
[0032] Embodiment 2: On the basis of embodiment 1, in order to realize the position adjustment of the reverse spiral return material device 12, a first slide rail 8 is provided on each of the first side plate 2 and the second side plate 3. A first slider 9 is connected to the first slide rail 8 for sliding up and down movement. The first slide rail 8 is a rectangular trough body, and the first slider 9 is a rectangular block structure. A second slide rail 10 is provided on the first slider 9. The second slider 11 is slidably connected to the second slide rail 10 in the horizontal direction. The second slide rail 10 is a rectangular trough body, and the second slider 11 is a rectangular block structure. A guide groove 13 is provided on the first slider 9. A guide block 14 is fixed to the bottom end of the second slider 11, and the guide block 14 is slidably connected to the guide groove 13 A limiting groove 15 is provided on the first slider 9, and a limiting assembly mounting rod 16 is fixed on the guide block 14. The limiting assembly mounting rod 16 has an "L"-shaped plate structure. A limiting screw hole 17 is provided on the limiting assembly mounting rod 16. A limiting screw 18 is installed in the limiting screw hole 17 through a threaded connection. One end of the limiting screw 18 is fixed to a limiting rod 19, and the limiting rod 19 is against the first slider 9. A second screw hole 24 is provided on the first side plate 2 and the second side plate 3. The second screw hole 24 is connected to the first slide rail 8. A second screw rod 25 is installed in the second screw hole 24 through a threaded connection. The bottom end of the second screw rod 25 is rotatably connected to the top of the first slider 9.
[0033] By screwing the second screw 25, the height of the second screw 25 can be adjusted under the action of the threaded connection between the second screw hole 24 and the second screw 25. The second screw 25 can adjust the height of the first slider 9 in the first slide rail 8, thereby adjusting the height of the spiral feeder 7. By prying the second slider 11, the second slider 11 can move horizontally in the second slide rail 10, and the horizontal position of the anti-spiral return device 12 can be adjusted; when the second slider 11 moves, the guide block 14 slides in the guide groove 13, and the limit assembly mounting rod 16 slides in the limit groove 15. After adjusting to the desired position, the limit screw 18 is screwed. Under the action of the threaded connection between the limit screw hole 17 and the limit screw 18, the limit screw 18 pushes the limit rod 19 so that the two groups of limit rods 19 are respectively pressed on the end surfaces of the two groups of first sliders 9 that are away from each other, thereby achieving the guide Block 14 is limited, thereby realizing limiting of the second slider 11 and the reverse spiral return material device 12; the position adjustment of the reverse spiral return material device 12 should follow the following principles: according to the maximum particle size of the asphalt mixture, the front and rear spacing between the reverse spiral return material device 12 and the screw feeder 7 is synchronously adjusted. When the maximum particle size of the asphalt mixture is less than 13.2 mm, the reverse spiral return material device 12 is adjusted to 7150 mm from the screw feeder; when the maximum particle size of the asphalt mixture is between 13.2 mm and 19 mm, the reverse spiral return material device 12 is adjusted to 7200 mm from the screw feeder; when the maximum particle size of the asphalt mixture is between 19 mm and 31.5 mm, the reverse spiral return material device 12 is adjusted to 7250 mm from the screw feeder; when the maximum particle size of the asphalt mixture is greater than 31.5 mm, the reverse spiral return material device 12 is adjusted to 7300 mm from the screw feeder.
[0034] Example 3: On the basis of Example 2, in order to realize the sliding connection between the baffle 1 and the movable side plate 4, a guide rod 20 is fixed between the first side plate 2 and the second side plate 3, and a guide hole 21 is provided on the movable side plate 4. The guide rod 20 is movably inserted in the guide hole 21. The guide rod 20 is a round rod structure, and the guide hole 21 is a round hole structure. A first screw hole 22 is provided on the movable side plate 4. One end of the first screw 23 is rotatably connected to the first side plate 2, and the other end of the first screw 23 is rotatably connected to the second side plate 3. A threaded connection is provided between the first screw 23 and the first screw hole 22.
[0035] The motor drives the first screw 23 to rotate, and under the action of the threaded connection between the first screw hole 22 and the first screw 23, the movable side plate 4 is pushed to move. The two ends of the guide rod 20 are respectively fixed on the first side plate 2 and the second side plate 3, and are inserted into the guide hole 21 opened on the surface of the movable side plate 4, thereby guiding the movement of the movable side plate 4.
[0036] Example 4: On the basis of Example 3, in order to realize the extension of the screw feeder 7, a plug-in slot 29 is provided on the screw feeder 7, and a plug-in block 30 is fixed on the rotating shaft 27. The plug-in block 30 is movably plugged into the plug-in slot 29, and the plug-in block 30 is installed with the plug-in slot 29 by cooperating with the screw holes. A screw feeder extension rod 26 is movably installed on the baffle 1, and a mounting slot 32 is provided at one end of the screw feeder extension rod 26, and a mounting block 33 is fixed at the other end of the screw feeder extension rod 26. A mounting rod 31 and a mounting plate 34 are fixed on the baffle 1. The mounting rod 31 has an "L"-shaped rod structure, and the other end of the mounting rod 31 is movably plugged into the mounting slot 32, and the mounting block 33 is mounted on the mounting plate 34 through the screw holes.
[0037] Set up several groups of screw feeder extension rods 26 of different lengths. When the position of the movable side plate 4 is adjusted and the length of the screw feeder 7 needs to be extended, the screw feeder extension rod 26 of appropriate length is selected according to the distance moved by the movable side plate 4. As the movable side plate 4 moves, the rotating shaft 27 withdraws from the shaft hole 28, the screws between the plug-in slot 29 and the plug-in block 30 are removed, the rotating shaft 27 is removed from the screw feeder 7, the mounting block 33 fixed on the selected screw feeder extension rod 26 is inserted into the plug-in slot 29 and fixed with screws, and then the plug-in block 30 is inserted into the screw feeder. The screw feeder extension rod 26 is inserted into the mounting groove 32 on the screw feeder extension rod 26 and is also fixed by screws. Then, the movable side plate 4 is fine-tuned back so that the rotating shaft 27 is reinserted into the shaft hole 28. When the screw feeder 7 does not need to be extended, the screw feeder extension rod 26 is removed, and then one end of the screw feeder extension rod 26 is moved closer to the mounting rod 31 so that the mounting rod 31 is inserted into the mounting groove 32. After that, the screw holes on the mounting block 33 are aligned with the screw holes on the mounting plate 34 fixed to the baffle 1, and then the mounting block 33 and the mounting plate 34 are fixed together by screws, thereby realizing the storage of the screw feeder extension rod 26.
[0038] In actual use, asphalt coarse aggregate and fine aggregate are filled in the gullies of the road, the baffle 1 is installed on the loader, and the distance between the first side plate 2 and the movable side plate 4 is adjusted so that the distance between the first side plate 2 and the second side plate 3 is equal to the gully of the road. The motor drives the screw feeder 7 to rotate. When the loader pushes the baffle 1 forward, the first guide plate 5 and the second guide plate 6 push the asphalt scattered outside the gully into the gully. Under the rotation of the screw feeder 7, the asphalt mixed aggregate that was originally randomly piled up is transported horizontally, so that the mixed aggregate is paved. As the baffle 1 continues to move forward, the reverse The spiral return device 12 lifts the coarse aggregate that sinks to the bottom and mixes the coarse aggregate and fine aggregate again, so that the asphalt mixed aggregate is more uniform, avoiding the sedimentation and stratification of coarse aggregate during the asphalt pavement paving process, and solving the problem of vertical segregation during the asphalt pavement paving; the second screw 25 is screwed, and the height of the second screw 25 can be adjusted under the action of the threaded connection between the second screw hole 24 and the second screw 25. The second screw 25 can adjust the height of the first slider 9 in the first slide rail 8, thereby adjusting the height of the spiral feeder 7, and the second slider 11 is moved to make the second slider 11 move horizontally in the second slide rail 10. , the horizontal position of the anti-spiral return material device 12 can be adjusted; when the second slider 11 moves, the guide block 14 slides in the guide groove 13, and the limit assembly mounting rod 16 slides in the limit groove 15. After adjusting to the required position, the limit screw 18 is screwed. Under the threaded connection between the limit screw hole 17 and the limit screw 18, the limit screw 18 pushes the limit rod 19 so that the two groups of limit rods 19 are respectively pressed on the end surface of the two groups of first sliders 9 away from each other, thereby limiting the guide block 14, and then limiting the second slider 11 and the anti-spiral return material device 12; the position adjustment of the anti-spiral return material device 12 The following principles should be followed: the distance between the reverse spiral return device 12 and the screw feeder 7 should be adjusted synchronously according to the maximum particle size of the asphalt mixture. When the maximum particle size of the asphalt mixture is less than 13.2mm, the reverse spiral return device 12 should be adjusted to 7150mm from the screw feeder; when the maximum particle size of the asphalt mixture is between 13.2mm and 19mm, the reverse spiral return device 12 should be adjusted to 7200mm from the screw feeder; when the maximum particle size of the asphalt mixture is between 19mm and 31.5mm, the reverse spiral return device 12 should be adjusted to 7250mm from the screw feeder; when the maximum particle size of the asphalt mixture is greater than 31.5mm, the reverse spiral return device 12 should be adjusted to 7250mm from the screw feeder.5mm, adjust the anti-screw return device 12 to 7300mm from the screw feeder; the motor drives the first screw 23 to rotate, and under the threaded connection between the first screw hole 22 and the first screw 23, the movable side plate 4 is pushed to move, and the two ends of the guide rod 20 are respectively fixed on the first side plate 2 and the second side plate 3, and are plugged into the guide hole 21 opened on the surface of the movable side plate 4, thereby guiding the movement of the movable side plate 4; several groups of screw feeder extension rods 26 of different lengths are set. When the position of the movable side plate 4 is adjusted and the length of the screw feeder 7 needs to be extended, the screw feeder extension rod 26 of appropriate length is selected according to the distance moved by the movable side plate 4; as the movable side plate 4 moves, the rotating shaft 27 withdraws from the shaft hole 28, the screw between the plug slot 29 and the plug block 30 is removed, and the screw Remove the rotating shaft 27 from the screw feeder 7, insert the mounting block 33 fixed to the selected screw feeder extension rod 26 into the insertion slot 29 and secure it with screws. Then insert the insertion block 30 into the mounting slot 32 on the screw feeder extension rod 26 and secure it with screws. Then, fine-tune the movable side plate 4 back and reinsert the rotating shaft 27 into the shaft hole 28. When the screw feeder 7 does not need to be extended, remove the screw feeder extension rod 26, then move one end of the screw feeder extension rod 26 closer to the mounting rod 31, inserting the mounting rod 31 into the mounting slot 32. The screw holes on the mounting block 33 will then align with the screw holes on the mounting plate 34 fixed to the baffle 1. Then, screw the mounting block 33 and the mounting plate 34 together, thereby storing the screw feeder extension rod 26.
[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A reverse spiral material return device for preventing longitudinal segregation of a paver, comprising: The baffle (1) is characterized in that: a first side plate (2) is fixed to one end of the baffle (1), a second side plate (3) is fixed to the other end of the baffle (1), a movable side plate (4) is slidably connected to the baffle (1), a first guide plate (5) is fixed to the first side plate (2), a second guide plate (6) is fixed to the movable side plate (4), one end of a screw feeder (7) is rotatably connected to the first side plate (2), a rotating shaft (27) is movably installed on the other end of the screw feeder (7), an axial hole (28) is opened on the movable side plate (4), and the rotating shaft (27) is rotatably connected in the axial hole (28), the first side plate (2) and the second side plate (3) are both movably connected to the second slider (11), and a reverse spiral return device (12) is rotatably connected between the two groups of second sliders (11).
2. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 1, characterized in that: The first side plate (2) and the second side plate (3) are both provided with a first slide rail (8), and a first slider (9) is connected to the first slide rail (8) in an up-and-down sliding manner. The first slide rail (8) is a rectangular trough, and the first slider (9) is a rectangular block structure.
3. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 2, characterized in that: A second slide rail (10) is provided on the first slide block (9), and the second slide block (11) is slidably connected to the second slide rail (10) in the horizontal direction. The second slide rail (10) is a rectangular trough, and the second slide block (11) is a rectangular block structure.
4. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 3, characterized in that: A guide groove (13) is provided on the first slider (9), and a guide block (14) is fixed to the bottom end of the second slider (11), and the guide block (14) is slidably connected in the guide groove (13).
5. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 4, characterized in that: A limiting groove (15) is provided on the first slider (9), a limiting assembly mounting rod (16) is fixed on the guide block (14), the limiting assembly mounting rod (16) is in an "L"-shaped plate structure, a limiting screw hole (17) is provided on the limiting assembly mounting rod (16), a limiting screw (18) is installed in the limiting screw hole (17) through a threaded connection, one end of the limiting screw (18) is fixed to a limiting rod (19), and the limiting rod (19) is against the first slider (9).
6. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 5, characterized in that: A second screw hole (24) is provided on each of the first side plate (2) and the second side plate (3), and the second screw hole (24) is connected to the first slide rail (8). A second screw rod (25) is installed in the second screw hole (24) through a threaded connection, and the bottom end of the second screw rod (25) is rotatably connected to the top end of the first slider (9).
7. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 1, characterized in that: A guide rod (20) is fixed between the first side plate (2) and the second side plate (3); a guide hole (21) is provided on the movable side plate (4); the guide rod (20) is movably inserted into the guide hole (21); the guide rod (20) is a round rod structure; the guide hole (21) is a round hole structure; a first screw hole (22) is provided on the movable side plate (4); one end of a first screw rod (23) is rotatably connected to the first side plate (2); the other end of the first screw rod (23) is rotatably connected to the second side plate (3); a threaded connection is provided between the first screw rod (23) and the first screw hole (22).
8. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 1, characterized in that: The screw feeder (7) is provided with a plug-in slot (29), a plug-in block (30) is fixed on the rotating shaft (27), the plug-in block (30) is movably plugged into the plug-in slot (29), and the plug-in block (30) and the plug-in slot (29) are installed by means of screw holes.
9. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 1, characterized in that: A screw feeder extension rod (26) is movably mounted on the baffle (1), one end of the screw feeder extension rod (26) is provided with a mounting groove (32), and the other end of the screw feeder extension rod (26) is fixed with a mounting block (33).
10. The reverse spiral material return device for preventing longitudinal segregation of a paver according to claim 9, characterized in that: A mounting rod (31) and a mounting plate (34) are fixed to the baffle (1); the mounting rod (31) is an L-shaped rod structure; the other end of the mounting rod (31) is movably inserted into the mounting groove (32); and the mounting block (33) is mounted on the mounting plate (34) through screw holes.