Anti-spiral return device for preventing longitudinal segregation of a paver
By installing a reverse auger return device on the paver, and utilizing the combination design of the baffle and the reverse auger return device, the problem of longitudinal segregation in asphalt pavers is solved, achieving uniform distribution of asphalt mixture and improving paving quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO JIAOFA EXPRESSWAY DEV GRP CO LTD
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies cannot effectively prevent longitudinal segregation during asphalt pavers, especially vertical segregation caused by coarse aggregate deposition and stratification.
A reverse spiral feeder is used to prevent longitudinal segregation of the paver. Through the combination design of baffle and reverse spiral feeder, the rotation of the spiral feeder and the guide plate push the scattered asphalt mixture into the ditch, and the reverse spiral feeder lifts up the settled coarse aggregate, so as to achieve the remixing of coarse and fine aggregates.
It effectively avoids the deposition and stratification of coarse aggregates during asphalt pavement paving, ensures the uniform distribution of asphalt mixture, solves the problem of vertical segregation, and improves paving quality.
Smart Images
Figure CN224531395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paver technology, specifically to an anti-spiral material return device for preventing longitudinal segregation in pavers. Background Technology
[0002] Asphalt mixture paving is a crucial step in asphalt pavement construction. It typically involves using an asphalt paver to evenly spread hot-mix asphalt mixture onto the road surface at a specific width and thickness. High uniformity in asphalt mixture paving is essential to prevent segregation. Generally, the paving speed of the asphalt paver should be controlled between 2 and 6 m / min, maintaining continuous and uniform operation without interruption or sudden speed changes. The auger feeder must rotate continuously, ensuring the asphalt mixture height on both sides is no less than 2 / 3 of the feeder's height to prevent segregation.
[0003] In the prior art, in order to prevent vertical segregation of asphalt pavers during the paving process, the existing measures mainly involve adding iron chains or rubber sheets under the front baffle of the auger to block the rolling and scattered coarse aggregate and make it remix with the fine aggregate subsequently transported by the auger, thereby preventing vertical segregation near both ends of the auger.
[0004] However, the existing measures have not been effective in practice 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 serve to prevent the coarse aggregate from scattering, but the coarse aggregate will still settle at the bottom, causing the fine aggregate and coarse aggregate to separate into layers, and failing to achieve a uniform distribution after the coarse and fine aggregates are mixed again. Summary of the Invention
[0005] The purpose of this invention is to provide an anti-spiral return device to prevent longitudinal segregation in pavers, thereby solving the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a reverse spiral material 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, a spiral feeder rotatably connected to one end of the first side plate, a rotating shaft movably mounted to the other end of the spiral feeder, a shaft hole opened on the movable side plate, the rotating shaft rotatably connected in the shaft hole, a second slider movably connected to both the first and second side plates, and a reverse spiral material return device rotatably connected between the two sets of second sliders.
[0007] Preferably, a first slide rail is provided on both the first side plate and the second side plate, and a first slider is slidably connected in the first slide rail. The first slide rail is a rectangular groove and the first slider is a rectangular block structure.
[0008] Preferably, a second slide rail is provided on the first slider, and the second slider is slidably connected in the second slide rail in the horizontal direction. The second slide rail is a rectangular groove, and the second slider is a rectangular block structure.
[0009] Preferably, the first slider has a guide groove, and the bottom end of the second slider is fixed with a guide block, which is slidably connected in the guide groove.
[0010] Preferably, a limiting groove is formed on the first slider, and a limiting component mounting rod is fixed on the guide block. The limiting component mounting rod has an "L"-shaped plate structure and a limiting screw hole is formed on the limiting component mounting rod. A limiting screw is installed in the limiting screw hole by threaded connection. A limiting rod is fixed to one end of the limiting screw, and the limiting rod abuts against the first slider.
[0011] Preferably, a second screw hole is provided on both 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 by threaded connection. 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 plate and the second side plate, a guide hole is provided on the movable side plate, the guide rod is movably inserted into the guide hole, the guide rod has a round rod structure, the guide hole has a round hole structure, a first screw hole is provided on the movable side plate, one end of a first screw is rotatably connected to the first side plate, the other end of the first screw is rotatably connected to the second side plate, and a threaded connection is provided between the first screw and the first screw hole.
[0013] Preferably, the screw feeder has an insertion slot, and an insertion block is fixed on the rotating shaft. The insertion block is movably inserted into the insertion slot, and the insertion block and the insertion slot are installed through the cooperation of screws and 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 an installation groove, and the other end of the screw feeder extension rod is fixed with an installation block.
[0015] Preferably, the baffle is fixed with a mounting rod and a mounting plate. The mounting rod has an "L"-shaped rod structure, and the other end of the mounting rod is movably inserted into the mounting groove. The mounting block is mounted on the mounting plate through screw holes.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] This invention proposes a reverse spiral feeder to prevent longitudinal segregation in pavers. The device fills the road trenches with coarse and fine asphalt aggregates. A baffle is installed on a loader, and the distance between the first and second side plates is adjusted to match the distance between the first and second side plates. A motor drives the spiral feeder to rotate. As the loader pushes the baffle forward, the first and second guide plates push the asphalt scattered outside the trenches into them. Under the rotation of the spiral feeder, the originally randomly piled and uneven asphalt aggregate mixture is laterally conveyed, thus leveling the mixture. As the baffle continues to move forward, the reverse spiral feeder lifts the coarse aggregate that has sunk to the bottom, further mixing the coarse and fine aggregates, making the asphalt aggregate mixture more uniform. This prevents coarse aggregate from settling and stratifying during asphalt pavement paving, solving the problem of vertical segregation during asphalt pavement paving. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 Schematic diagram of the extension rod structure of the screw feeder;
[0020] Figure 3 This is a schematic cross-sectional view of the present invention.
[0021] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle;
[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide hole;
[0023] Figure 6 This is a schematic diagram of the cross-sectional structure of the shaft hole;
[0024] Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point B;
[0025] Figure 8 A schematic diagram of the cross-sectional structure of the extension rod of the screw feeder;
[0026] Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point C;
[0027] Figure 10 for Figure 8 Enlarged schematic diagram of the structure at point D.
[0028] In the diagram: 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, reverse screw return device 12, guide groove 13, guide block 14, limit groove 15, limit component 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 23, second screw hole 24, second screw 25, screw feeder extension rod 26, rotating shaft 27, shaft hole 28, insertion groove 29, insertion block 30, mounting rod 31, mounting groove 32, mounting block 33, mounting plate 34. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0030] Example 1: Please refer to Figures 1 to 10 This utility model provides a technical solution: a reverse spiral material return device for preventing longitudinal segregation of a paver, comprising: a baffle 1, a first side plate 2 fixed to one end of the baffle 1, a second side plate 3 fixed to the other end of the baffle 1, a movable side plate 4 slidably connected to the baffle 1, a first guide plate 5 fixed to the first side plate 2, a second guide plate 6 fixed to the movable side plate 4, a spiral feeder 7 rotatably connected to one end of the first side plate 2, a rotating shaft 27 movably mounted to the other end of the spiral feeder 7, a shaft hole 28 opened on the movable side plate 4, the rotating shaft 27 rotatably connected in the shaft hole 28, a second slider 11 movably connected to both the first side plate 2 and the second side plate 3, and a reverse spiral material return device 12 rotatably connected between the two sets of second sliders 11.
[0031] In actual use, coarse and fine asphalt aggregates are filled into the road trenches. 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 that of the road trenches. The motor drives the screw feeder 7 to rotate. As the loader pushes the baffle 1 forward, the first guide plate 5 and the second guide plate 6 push the asphalt scattered outside the trenches into the trenches. Under the rotation of the screw feeder 7, the originally randomly piled and uneven asphalt aggregate mixture is transported laterally, so that the aggregate mixture is leveled. As the baffle 1 continues to move forward, the reverse screw return feeder 12 lifts up the coarse aggregate that has sunk to the bottom, and mixes the coarse and fine aggregates again, so that the asphalt aggregate mixture 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] Example 2: Based on Example 1, in order to achieve the position adjustment of the reverse spiral return feeder 12, a first slide rail 8 is provided on both the first side plate 2 and the second side plate 3. A first slider 9 is slidably connected vertically in the first slide rail 8. The first slide rail 8 is a rectangular groove, and the first slider 9 is a rectangular block structure. A second slide rail 10 is provided on the first slider 9, and a second slider 11 is slidably connected in the second slide rail 10 in the horizontal direction. The second slide rail 10 is a rectangular groove, and the second slider 11 is a rectangular block structure. 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. The guide block 14 is slidably connected in the guide groove 13. A limiting groove 15 is provided on the first slider 9, and a limiting component mounting rod 16 is fixed on the guide block 14. The limiting component mounting rod 16 has an "L"-shaped plate structure. A limiting screw hole 17 is provided on the limiting component mounting rod 16. A limiting screw 18 is installed in the limiting screw hole 17 by threaded connection. A limiting rod 19 is fixed to one end of the limiting screw 18. The limiting rod 19 abuts against the first slider 9. A second screw hole 24 is provided on both 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 25 is installed in the second screw hole 24 by threaded connection. The bottom end of the second screw 25 is rotatably connected to the top end of the first slider 9.
[0033] Tightening the second screw 25, under the action of the threaded connection between the second screw hole 24 and the second screw 25, can adjust the height of 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 screw feeder 7. Turning the second slider 11, causing the second slider 11 to move horizontally in the second slide rail 10, can adjust the horizontal position of the anti-screw return feeder 12. When the second slider 11 moves, the guide block 14 slides in the guide groove 13, and the limit component mounting rod 16 slides in the limit groove 15. After adjusting to the desired position, tightening the limit screw 18, 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 sets of limit rods 19 are respectively pressed against the two sets of first sliders 9 at their opposite ends, thereby achieving guidance. Block 14 is used for limiting, thereby limiting the second slider 11 and the reverse spiral feeder 12. The position adjustment of the reverse spiral feeder 12 should follow the following principles: the front and rear distance between the reverse spiral feeder 12 and the spiral 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 distance between the reverse spiral feeder 12 and the spiral feeder 7 should be adjusted to 150mm; when the maximum particle size of the asphalt mixture is between 13.2mm and 19mm, the distance between the reverse spiral feeder 12 and the spiral feeder should be adjusted to 7200mm; when the maximum particle size of the asphalt mixture is between 19mm and 31.5mm, the distance between the reverse spiral feeder 12 and the spiral feeder should be adjusted to 7250mm; when the maximum particle size of the asphalt mixture is greater than 31.5mm, the distance between the reverse spiral feeder 12 and the spiral feeder should be adjusted to 7300mm.
[0034] Example 3: Based on Example 2, in order to achieve 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. A guide hole 21 is provided on the movable side plate 4, and the guide rod 20 is movably inserted into the guide hole 21. The guide rod 20 has a round rod structure, and the guide hole 21 has 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. Under the threaded connection between the first screw hole 22 and the first screw 23, the moving side plate 4 is pushed to move. The two ends of the guide rod 20 are fixed on the first side plate 2 and the second side plate 3 respectively, and are also inserted into the guide hole 21 opened on the surface of the moving side plate 4, thereby guiding the movement of the moving side plate 4.
[0036] Example 4: Based on Example 3, in order to extend the screw feeder 7, the screw feeder 7 is provided with a plug-in slot 29, and a plug-in block 30 is fixed on the rotating shaft 27. The plug-in block 30 is movably inserted into the plug-in slot 29. The plug-in block 30 and the plug-in slot 29 are installed through the cooperation of screw holes. A screw feeder extension rod 26 is movably installed on the baffle 1. One end of the screw feeder extension rod 26 is provided with a mounting slot 32, and the other end of the screw feeder extension rod 26 is fixed with a mounting block 33. 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. The other end of the mounting rod 31 is movably inserted into the mounting slot 32. The mounting block 33 is installed on the mounting plate 34 through screw holes.
[0037] Several sets of screw feeder extension rods 26 of different lengths are set up. When the position of the moving side plate 4 is adjusted and the length of the screw feeder 7 needs to be extended, the appropriate length of screw feeder extension rod 26 is selected according to the distance the moving side plate 4 moves. As the moving side plate 4 moves, the rotating shaft 27 is withdrawn from the shaft hole 28. The screws between the insertion slot 29 and the insertion block 30 are removed, and 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 insertion slot 29 and fixed with screws. Then, the insertion block 30 is inserted into the screw feeder. The screw feeder 26 is inserted into the mounting slot 32 on the extension rod 26 and fixed with screws. Then, the moving side plate 4 is slightly adjusted back so that the rotating shaft 27 is re-inserted into the shaft hole 28. When the screw feeder 7 does not need to be extended, the screw feeder extension rod 26 is removed. Then, one end of the screw feeder extension rod 26 is brought close to the mounting rod 31 so that the mounting rod 31 is inserted into the mounting slot 32. Then, the screw hole on the mounting block 33 will be aligned with the screw hole on the mounting plate 34 fixed on the baffle 1. Then, the mounting block 33 and the mounting plate 34 are fixed together with screws to realize the storage of the screw feeder extension rod 26.
[0038] In actual use, coarse and fine asphalt aggregates are filled into the road trenches. Baffle 1 is installed on a 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 distance between the road trenches. The motor drives the screw feeder 7 to rotate. As the loader pushes baffle 1 forward, the first guide plate 5 and the second guide plate 6 push the asphalt scattered outside the trenches into the trenches. Under the rotation of the screw feeder 7, the originally randomly piled and uneven asphalt aggregate mixture is transported laterally, thus leveling the aggregate mixture. As baffle 1 continues to move forward, the asphalt mixture... The auger feeder 12 lifts up the coarse aggregate that has sunk to the bottom, mixing the coarse and fine aggregates again to make the asphalt mixture more uniform, preventing coarse aggregate deposition and stratification during asphalt pavement paving, and solving the problem of vertical segregation during asphalt pavement paving. Tightening the second screw 25, through the threaded connection between the second screw hole 24 and the second screw 25, allows adjustment of the height of 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 auger feeder 7. Moving the second slider 11 horizontally along the second slide rail 10 allows it to move horizontally. The horizontal position of the anti-spiral return feeder 12 can be adjusted. When the second slider 11 moves, the guide block 14 slides in the guide groove 13, and the limiting component mounting rod 16 slides in the limiting groove 15. After adjusting to the desired position, the limiting screw 18 is screwed on. Under the action of the threaded connection between the limiting screw hole 17 and the limiting screw 18, the limiting screw 18 pushes the limiting rod 19 so that the two sets of limiting rods 19 are respectively pressed on the two sets of first sliders 9 at their respective ends, thereby limiting the guide block 14, and thus limiting the second slider 11 and the anti-spiral return feeder 12. The position adjustment of the anti-spiral return feeder 12 The following principles should be followed: Adjust the distance between the reverse spiral feeder 12 and the spiral feeder 7 synchronously according to the maximum particle size of the asphalt mixture. When the maximum particle size of the asphalt mixture is less than 13.2 mm, adjust the distance between the reverse spiral feeder 12 and the spiral feeder 7 to 150 mm; when the maximum particle size of the asphalt mixture is between 13.2 mm and 19 mm, adjust the distance between the reverse spiral feeder 12 and the spiral feeder 7 to 7200 mm; when the maximum particle size of the asphalt mixture is between 19 mm and 31.5 mm, adjust the distance between the reverse spiral feeder 12 and the spiral feeder 7 to 7250 mm; when the maximum particle size of the asphalt mixture is greater than 31.5 mm...5mm, adjust the anti-spiral return feeder 12 to 7300mm from the screw feeder; 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, it pushes the moving side plate 4 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 also inserted into the guide hole 21 opened on the surface of the moving side plate 4, thereby guiding the movement of the moving side plate 4; set several sets of screw feeder extension rods 26 of different lengths. When the position of the moving side plate 4 is adjusted and the length of the screw feeder 7 needs to be extended, the appropriate length of the screw feeder extension rod 26 is selected according to the distance of movement of the moving side plate 4; as the moving side plate 4 moves, the rotating shaft 27 is withdrawn from the shaft hole 28, the screws between the insertion slot 29 and the insertion block 30 are removed, and the rotating shaft 27 is withdrawn from the shaft hole 28. 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 insertion slot 29 and secured with screws. Then, the insertion block 30 is inserted into the mounting slot 32 on the screw feeder extension rod 26 and secured with screws as well. Next, the moving side plate 4 is slightly adjusted back to allow the rotating shaft 27 to re-insert into the shaft hole 28. When the screw feeder 7 is no longer needed, the screw feeder extension rod 26 is removed. One end of the screw feeder extension rod 26 is then brought closer to the mounting rod 31, causing the mounting rod 31 to insert into the mounting slot 32. The screw holes on the mounting block 33 then align with the screw holes on the mounting plate 34 fixed on the baffle 1. Finally, the mounting block 33 and the mounting plate 34 are secured together with screws, thus achieving the storage of the screw feeder extension rod 26.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A reverse auger return device for preventing longitudinal segregation in pavers, comprising: The baffle (1) is characterized in that: a first side plate (2) is fixed at one end of the baffle (1), a second side plate (3) is fixed at 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 on the first side plate (2), a second guide plate (6) is fixed on 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), a shaft hole (28) is opened on the movable side plate (4), the rotating shaft (27) is rotatably connected in the shaft hole (28), a second slider (11) is movably connected to both the first side plate (2) and the second side plate (3), and a reverse screw return feeder (12) is rotatably connected between the two sets of second sliders (11); 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 an installation groove (32), and the other end of the screw feeder extension rod (26) is fixed with an installation block (33). An installation rod (31) and an installation plate (34) are fixed on the baffle (1). The installation rod (31) has an "L" shaped rod structure. The other end of the installation rod (31) is movably inserted into the installation groove (32), and the installation block (33) is installed on the installation plate (34) through screw holes.
2. The anti-spiral return material 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 provided with a first slide rail (8), and a first slider (9) is slidably connected in the first slide rail (8). The first slide rail (8) is a rectangular groove, and the first slider (9) is a rectangular block structure.
3. The anti-spiral return material device for preventing longitudinal segregation of a paver according to claim 2, characterized in that: The first slider (9) has a second slide rail (10) and the second slider (11) is slidably connected in the second slide rail (10) in the horizontal direction. The second slide rail (10) is a rectangular groove and the second slider (11) is a rectangular block structure.
4. The anti-spiral return material device for preventing longitudinal segregation of a paver according to claim 3, characterized in that: The first slider (9) has a guide groove (13), and the bottom end of the second slider (11) is fixed with a guide block (14), which is slidably connected in the guide groove (13).
5. The anti-spiral return material 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), and a limiting component mounting rod (16) is fixed on the guide block (14). The limiting component mounting rod (16) has an "L" shaped plate structure. A limiting screw hole (17) is provided on the limiting component mounting rod (16). A limiting screw (18) is installed in the limiting screw hole (17) by threaded connection. A limiting rod (19) is fixed at one end of the limiting screw (18), and the limiting rod (19) abuts against the first slider (9).
6. The anti-spiral return material device for preventing longitudinal segregation of a paver according to claim 5, characterized in that: The first side plate (2) and the second side plate (3) are provided with second screw holes (24). The second screw holes (24) are connected to the first slide rail (8). A second screw (25) is installed in the second screw hole (24) by threaded connection. The bottom end of the second screw (25) is rotatably connected to the top end of the first slider (9).
7. The anti-spiral return material 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) has a round rod structure, and the guide hole (21) has 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). 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).
8. The anti-spiral return material device for preventing longitudinal segregation of a paver according to claim 1, characterized in that: The screw feeder (7) has a plug slot (29) and a plug block (30) is fixed on the rotating shaft (27). The plug block (30) is movably inserted into the plug slot (29). The plug block (30) and the plug slot (29) are installed through the cooperation of screws and screw holes.