Adjustable screed device for a modified bitumen paver

Abstract

The application relates to the technical field of asphalt paving equipment, and discloses an adjustable scraper device for a modified asphalt paver, which comprises a positioning sleeve, scraper strips and two chains arranged at intervals, the positioning sleeve is in sliding connection with the scraper strips, supporting rods are fixedly arranged on the two sides of the top end of each scraper strip, screw rods are fixedly arranged on the inner walls of the two sides of the top end of the positioning sleeve and in penetrating connection with the supporting rods, lock nuts are arranged at the top end and the bottom end of each supporting rod and are in threaded connection with the screw rods, and clamping sleeves are fixedly arranged on the two sides of the positioning sleeve; through the sliding cooperation of the positioning sleeve and the scraper strips and the threaded adjusting structure of the screw rods and the lock nuts, the stepless adjustment of the extension length of the scraper is realized, the increase of the gap caused by the wear of the scraper and the bottom plate can be compensated, the service life of the equipment is prolonged, the gap can be flexibly adjusted according to the modified asphalt mixtures with different particle sizes, and the jamming and chain breaking can be effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of asphalt paving equipment technology, specifically to an adjustable scraper device for a modified asphalt paver. Background Technology

[0002] In asphalt pavement paving construction, the scraper conveyor is the core material conveying link connecting the hopper and the auger distributor. The scraper is fixed on the conveyor chain, and the size of the gap between its bottom end and the bottom plate of the hopper directly determines the conveying efficiency and operational safety. If the gap is too large, a large amount of mixture will leak back, resulting in insufficient material supply; if the gap is too small, coarse aggregate is easy to get stuck between the scraper and the bottom plate, which will at least aggravate wear and at worst cause chain breakage accidents.

[0003] Currently, most existing scraper blades are fixed structures, meaning the gap is fixed at the factory and cannot be adjusted according to actual working conditions. As the equipment operates for a long time, wear occurs between the scraper blade and the base plate, the gap gradually increases, and the conveying efficiency continues to decline. However, this cannot be compensated for by on-site adjustments, and the only option is to passively replace the worn parts. These defects are particularly prominent when using modified asphalt mixtures. Taking AE2 modified asphalt as an example, this material is designed for high-temperature and heavy-load traffic conditions and has characteristics such as high viscosity, large aggregate particle size, and high conveying resistance. Its sensitivity to gaps is much higher than that of ordinary asphalt mixtures. Improperly fixed gaps can easily cause jamming. In addition, existing scraper blades are mostly connected to chains by U-bolts, requiring the tightening of multiple nuts for disassembly and assembly, resulting in limited operating space and severely restricting maintenance efficiency.

[0004] Therefore, there is a need for a scraper device with an online adjustable gap, which can flexibly change the extension length of the scraper according to the characteristics and wear conditions of modified asphalt, and has a quick disassembly and assembly function. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an adjustable scraper device for modified asphalt pavers, which has the advantage of online gap adjustment and solves the problems mentioned in the background art.

[0006] This invention provides the following technical solution: an adjustable scraper device for a modified asphalt paver, comprising a positioning sleeve, a scraper strip, and two spaced chains. The positioning sleeve is slidably connected to the scraper strip. Support rods are fixedly provided on both sides of the top of the scraper strip. Screws that are inserted and connected to the support rods are fixedly provided on the inner walls of both sides of the top of the positioning sleeve. Locking nuts that are threadedly connected to the screws are provided at the top and bottom of the support rods. Sleeves are fixedly provided on both sides of the positioning sleeve. Card seats are fixedly provided on one side of each of the two chains. A slot is provided at the top of the card seat. A quick-insertion mechanism is provided on the inner wall of the top of the card sleeve. An unlocking pressing block corresponding to the quick-insertion mechanism is provided at the top of the card sleeve. Limiting mechanisms for limiting the quick-insertion mechanism are provided on both sides of the card seat.

[0007] As a preferred embodiment of the present invention, the quick-connect mechanism includes a plug block, which is engaged with the inside of the slot. The top of the plug block is fixedly connected to the inner wall of the top of the sleeve. Guide slant openings are provided at the bottom of both sides of the plug block. Limiting grooves are provided in the middle of both sides of the plug block. An unlocking component is provided in the middle of the top of the plug block.

[0008] As a preferred embodiment of the present invention, the unlocking component includes an unlocking block. A lifting groove communicating with a limiting groove is provided in the middle of the top of the block. The unlocking block is slidably connected to the lifting groove. Guide grooves are provided on both sides of the lifting groove. Guide blocks are fixedly provided on both sides of the unlocking block and slidably connected to the guide grooves. Guide oblique openings are provided on both sides of the bottom end of the unlocking block. A vertically arranged spring is provided at the bottom end of the unlocking block. Spring posts are engaged at both ends of the spring. The top spring post of the spring is fixedly connected to the middle of the bottom end of the unlocking block. The bottom spring post of the spring is fixedly connected to the bottom of the lifting groove.

[0009] As a preferred embodiment of the present invention, the limiting mechanism includes a cover plate and a limiting block. A guide sleeve is fixedly provided on one side of the cover plate, and a guide post is slidably connected to the guide sleeve. A circular groove is provided on one side of the limiting block, and one end of the guide post is fixed in the circular groove. The same spring is sleeved on the surfaces of the guide sleeve and the guide post. The spring provides elastic support to the limiting block in the direction of the limiting groove. The circular groove is used to provide compression space for the spring. The top and bottom of the other side of the limiting block are both provided with rounded corners.

[0010] Both sides of the card holder are provided with sliding grooves that communicate with the inside of the slot. The limiting block is slidably connected to the inside of the sliding groove. One side of the sliding groove is provided with a receiving groove. The cover plate is installed in the receiving groove through countersunk holes and screws to prevent the cover plate and screws from protruding from the side of the card holder.

[0011] As a preferred embodiment of the present invention, the top of the sleeve is provided with a slide rail, the unlocking press block is slidably connected to the inside of the slide rail, the bottom end of the slide rail is fixedly provided with a retaining ring one, the top end of the slide rail is provided with a retaining ring two, the unlocking press block is located at the bottom end of the retaining ring two, the bottom end of the retaining ring two is provided with a high temperature resistant sealing gasket to prevent foreign objects from entering the slide rail, the middle part of the bottom end of the unlocking press block is fixedly provided with a pressure rod, the pressure rod abuts against the top end of the unlocking block, the surface of the pressure rod is fitted with a spring three, the spring three is located between the retaining ring one and the unlocking press block.

[0012] As a preferred embodiment of the present invention, the sleeve is engaged with the surface of the card holder, the sleeve has an open bottom structure for vertically fitting onto the outer surface of the card holder, and one side of the sleeve also has an opening for fitting against the outer chain plate on one side of the chain.

[0013] As a preferred embodiment of the present invention, the bottom end of the positioning sleeve is provided with a scraper mounting groove, the top end of the scraper strip is inserted into the scraper mounting groove and slidably engaged with the positioning sleeve, the scraper mounting groove is a rectangular groove, the inner wall contour of which is adapted to the outer wall of the scraper strip to form a vertical sliding guide fit, and a high temperature resistant sealing strip is embedded at the bottom of the scraper mounting groove. Grooves are provided on both sides of the top end of the scraper strip, the grooves are used to provide installation space for the bottom locking nut, the support rod is fixedly connected to the top of the groove, and the top surface of the support rod is at the same level as the top end of the scraper strip. A rod groove is provided on the surface of the support rod, the screw passes through the rod groove and can slide relative to it, and a wedge-shaped washer is provided between the locking nut and the support rod. The wedge-shaped washer is a wedge-shaped anti-loosening washer with two inclined surfaces in opposite directions, which has an anti-loosening locking function.

[0014] As a preferred embodiment of the present invention, the surface of the positioning sleeve is provided with an operating port corresponding to the groove, which is used to rotate the locking nut through the operating port to adjust the height of the scraper strip. A cover is installed on one side of the operating port by screws, and a second high-temperature resistant sealing strip is provided between the cover and the operating port to prevent foreign objects from entering the interior of the positioning sleeve. Both the first and second high-temperature resistant sealing strips are made of fluororubber.

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

[0016] 1. This modified asphalt paver uses an adjustable scraper device. Through the sliding fit between the positioning sleeve and the scraper blade, as well as the threaded adjustment structure of the screw and locking nut, the extension length of the scraper blade can be infinitely adjusted. This can compensate for the increased gap caused by wear between the scraper blade and the base plate, extending the service life of the equipment. It can also flexibly adjust the gap for modified asphalt mixtures of different particle sizes, effectively preventing jamming and chain breakage. At the same time, the wedge-shaped gasket between the locking nut and the support rod can effectively resist high-frequency vibration and impact, ensuring long-term stability of the adjusted gap. Combined with the design of the operating port, cover and high-temperature resistant sealing strip, it takes into account both the convenience of adjustment and the sealing and dustproof performance.

[0017] 2. This modified asphalt paver uses an adjustable scraper device. Through the cooperation of a ferrule, a mounting bracket, a quick-release mechanism, and a limiting mechanism, it achieves quick assembly and disassembly between the scraper assembly and the chain. Insertion automatically locks the scraper, and pressing the unlocking block unlocks and removes it without needing to tighten any bolts, greatly shortening the on-site replacement time of the scraper assembly. The limiting mechanism's structure, where the guide post is embedded in a circular groove and the spring is sleeved on the guide sleeve and the guide post surface, significantly reduces the space occupied. The cover plate is embedded in the side of the mounting bracket through a countersunk hole to avoid protrusion interference. The overall structure is compact and reliable. In addition, the high-temperature resistant sealing strip one, the high-temperature resistant sealing strip two, and the high-temperature resistant sealing gasket are all made of fluororubber, which can adapt to the high-temperature environment of modified asphalt construction and ensure the long-term reliability of the device under high-temperature and heavy-load conditions. Attached Figure Description

[0018] Figure 1 This is one of the structural schematic diagrams of the present invention;

[0019] Figure 2 This is the second structural schematic diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the plate sleeve of the present invention;

[0021] Figure 4 This is a schematic cross-sectional view of the plate sleeve of the present invention;

[0022] Figure 5 This is a schematic diagram of the structure of the card sleeve of the present invention;

[0023] Figure 6 This is a schematic cross-sectional view of the card sleeve of the present invention;

[0024] Figure 7 This is a cross-sectional structural diagram of the card holder of the present invention;

[0025] Figure 8 This is a schematic diagram of the quick-connect mechanism of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the unlocking component of the present invention.

[0027] In the diagram: 1. Positioning sleeve; 2. Scraper strip; 3. Groove; 4. Support rod; 5. Screw; 6. Locking nut; 7. Sleeve; 8. Quick-connect mechanism; 801. Insert block; 802. Limiting groove; 803. Guide bevel one; 804. Lifting groove; 805. Guide groove; 806. Unlocking component; 8061. Unlocking block; 8062. Guide bevel two; 8063. Guide block; 8064. Spring one; 8065. Spring column; 9. Unlocking pressing block; 10. Card seat; 1 1. Chain; 12. Slot; 13. Limiting mechanism; 1301. Cover plate; 1302. Guide sleeve; 1303. Guide post; 1304. Spring II; 1305. Limiting block; 1306. Circular groove; 14. High-temperature resistant sealing strip I; 15. Operating port; 16. High-temperature resistant sealing strip II; 17. Cover; 18. Slide rail; 19. Retaining ring I; 20. Retaining ring II; 21. Spring III; 22. High-temperature resistant sealing gasket; 23. Slide groove; 24. Scraper mounting groove; 25. Pressure rod. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figures 1-9 An adjustable scraper device for a modified asphalt paver includes a positioning sleeve 1, a scraper strip 2, and two spaced chains 11.

[0030] The positioning sleeve 1 is a rectangular sleeve with a scraper mounting groove 24 at its bottom. The scraper mounting groove 24 is a rectangular groove, and its inner wall contour is adapted to the outer wall of the scraper strip 2. The top end of the scraper strip 2 is inserted into the scraper mounting groove 24 and slides and engages with the positioning sleeve 1 to form a sliding guide fit in the vertical direction. When the scraper strip 2 is subjected to the lateral impact force when scraping material, the rectangular surface fit structure can effectively withstand the lateral force and overturning moment, ensuring that the scraper strip 2 only moves up and down in the vertical direction and avoids deflection and jamming.

[0031] The scraper bar 2 has rectangular grooves 3 on both sides of its top end. A support rod 4 is fixed to the top of the groove 3. The top surface of the support rod 4 is at the same level as the top end of the scraper bar 2. A rod groove is formed on the surface of the support rod 4. Screws 5, which are inserted and connected to the support rod 4, are fixed to the inner walls of both sides of the top end of the positioning sleeve 1. The screws 5 are inserted into the rod grooves and can slide relative to each other. Locking nuts 6, which are threaded to the screws 5, are provided at the top and bottom ends of the support rod 4. The locking nut 6 located above the support rod 4 locks the support rod 4 from above. The locking nut 6 below the support rod 4 locks the support rod 4 from below. The two work together to fix the support rod 4 at a certain height position of the screw rod 5. The groove 3 provides installation space for the bottom locking nut 6, so that the bottom locking nut 6 can be screwed in smoothly. A wedge-shaped washer is provided between the locking nut 6 and the support rod 4. The wedge-shaped washer is a wedge-shaped anti-loosening washer. Its two inclined surfaces are opposite in direction and have an anti-loosening locking function. When the locking nut 6 is tightened, the relative inclined surfaces of the two wedge-shaped washers produce a wedge effect, which effectively prevents the nut from loosening due to vibration.

[0032] The bottom of the scraper mounting groove 24 is fitted with a high-temperature resistant sealing strip 14. The inner edge of the high-temperature resistant sealing strip 14 elastically abuts against the outer wall surface of the scraper strip 2 to prevent asphalt mixture particles from entering the positioning sleeve 1.

[0033] Both sides of the positioning sleeve 1 are fixedly provided with a retaining sleeve 7, and both sides of the two chains 11 are fixedly provided with a retaining seat 10. The retaining sleeve 7 is engaged with the surface of the retaining seat 10. The retaining sleeve 7 has a bottom opening structure for vertically fitting onto the outer surface of the retaining seat 10. One side of the retaining sleeve 7 is also provided with an opening for fitting against the outer chain plate on one side of the chain 11. This ensures that after the retaining sleeve 7 is fitted onto the retaining seat 10, there is a gap or fit between its opening side and the outer chain plate of the chain 11, thus avoiding interference with the movement of the chain 11.

[0034] The top of the card holder 10 has a slot 12, and the inner wall of the top of the card sleeve 7 has a quick-connect mechanism 8. The slot 12 and the quick-connect mechanism 8 cooperate to quickly install the positioning sleeve 1. The top of the card sleeve 7 has an unlocking press block 9 corresponding to the quick-connect mechanism 8, which can press the quick-connect mechanism 8. Both sides of the card holder 10 have a limiting mechanism 13 for limiting the quick-connect mechanism 8. The limiting mechanism 13 cooperates with the quick-connect mechanism 8 to quickly install and remove the positioning sleeve 1.

[0035] In this embodiment, preferably, the quick-connect mechanism 8 includes a plug 801, which is a rectangular block structure with a cross-section that matches the cross-section of the slot 12. The plug 801 is internally engaged with the slot 12 (i.e., the plug 801 is inserted into the slot 12). The top of the plug 801 is fixedly connected to the inner wall of the top of the sleeve 7. The bottom of both sides of the plug 801 is provided with a guide bevel 803. The guide bevel 803 is a chamfered bevel provided on the bottom edge of both sides of the plug 801. Its inclination direction is from the outside to the inside and from the bottom to the top. The middle of both sides of the plug 801 is provided with a limiting groove 802. The limiting groove 802 is a rectangular groove that is recessed from the surface of both sides of the plug 801.

[0036] An unlocking component 806 is provided at the center of the top of the insertion block 801. The unlocking component 806 includes an unlocking block 8061. A lifting groove 804 communicating with the limiting groove 802 is opened at the center of the top of the insertion block 801. The lifting groove 804 is a rectangular through groove arranged vertically. Its upper end opens into the top surface of the insertion block 801, and its lower end extends into the interior of the insertion block 801 and communicates with the two limiting grooves 802. The unlocking block 8061 is slidably connected to the lifting groove 804 (that is, the unlocking block 8061 can slide up and down in the lifting groove 804). The lifting groove 804 has guide grooves 805 on both sides, and the unlocking block 8061 has guide blocks 8063 fixedly connected to the guide grooves 805 on both sides. The guide groove 805 is a vertically arranged strip groove, and its width is adapted to the width of the guide block 8063. The guide block 8063 protrudes outward from both sides of the unlocking block 8061 and is embedded in the guide groove 805. It guides and limits the lifting movement of the unlocking block 8061 and prevents the unlocking block 8061 from deflecting during the lifting process.

[0037] The bottom of the unlocking block 8061 is provided with guide bevels 8062 on both sides. The guide bevels 8062 are chamfered bevels on the edges of the bottom of the unlocking block 8061. The bevels are inclined from the outside to the inside and from the bottom to the top (i.e., the bottom width is less than the top width). The bottom of the unlocking block 8061 is provided with a vertically arranged spring 8064. The spring 8064 is a compression spring. Both ends of the spring 8064 are engaged with spring posts 8065. The spring posts 8065 are cylindrical protrusions. Their outer diameter is matched with the inner diameter of the spring 8064. The top spring post 8065 of the spring 8064 is fixedly connected to the middle of the bottom of the unlocking block 8061. The bottom spring post 8065 of the spring 8064 is fixedly connected to the bottom of the lifting groove 804. The spring 8064 is used to provide an upward elastic support force for the unlocking block 8061, so that the unlocking block 8061 is kept in the raised position when there is no external force.

[0038] In this embodiment, preferably, the limiting mechanism 13 includes a cover plate 1301 and a limiting block 1305. The cover plate 1301 is a rectangular plate, and a guide sleeve 1302 is fixedly provided on one side of the cover plate 1301. The guide sleeve 1302 is a hollow cylindrical sleeve, one end of which is fixedly connected to the inner side of the cover plate 1301. A guide post 1303 is slidably connected to the guide sleeve 1302. The guide post 1303 is a cylindrical rod, one end of which passes through the guide sleeve 1302 and can slide along the axial direction of the guide sleeve 1302. A circular groove 1306 is provided on one side of the limiting block 1305, and one end of the guide post 1303 is fixed to the circular groove 1306. Inside 6, the same spring 1304 is sleeved on the surface of the guide sleeve 1302 and the guide post 1303. The spring 1304 is a compression spring and provides elastic support to the limiting block 1305 in the direction of the limiting groove 802. The circular groove 1306 is used to provide compression space for the spring 1304. The top and bottom of the other side of the limiting block 1305 are provided with rounded corners (that is, the upper and lower edges of the limiting block 1305 facing the slot 12 are rounded) to reduce the sliding friction between the limiting block 1305 and the guide bevel 803 and the guide bevel 8062.

[0039] Both sides of the card holder 10 are provided with sliding grooves 23 that communicate with the inside of the slot 12. The sliding groove 23 is a rectangular through groove arranged in the horizontal direction. One end of the groove communicates with the inside of the slot 12, and the other end opens to the outer side of the card holder 10. The limiting block 1305 is slidably connected to the inside of the sliding groove 23 (that is, the limiting block 1305 can slide horizontally in the sliding groove 23). One side of the sliding groove 23 is provided with a receiving groove. The receiving groove is a countersunk groove structure. Its depth is adapted to the thickness of the cover plate 1301. The cover plate 1301 is installed in the receiving groove through the countersunk hole and screws to avoid the cover plate 1301 and screws protruding from the side of the card holder 10 and thus avoid interference with the inner wall of the card sleeve 7.

[0040] In this embodiment, preferably, the top of the sleeve 7 is provided with a slide 18, which is a vertically arranged circular through hole that penetrates the top wall of the sleeve 7. The unlocking press block 9 is slidably connected to the inside of the slide 18, that is, the unlocking press block 9 can slide up and down in the slide 18. The bottom end of the slide 18 is fixedly provided with a retaining ring 19, which is an annular flange that protrudes inward from the inner wall of the bottom end of the slide 18 to limit the downward sliding limit of the unlocking press block 9. The top end of the slide 18 is provided with a retaining ring 20, which is an annular flange that protrudes inward from the inner wall of the top end of the slide 18 to limit the upward sliding limit of the unlocking press block 9 (to prevent the unlocking press block 9 from coming off the top end of the slide 18). The unlocking press block 9 is located at the bottom end of the retaining ring 20, and the top end of the unlocking press block 9 protrudes from the top opening of the slide 18, making it convenient for the operator to press.

[0041] The bottom end of the retaining ring 20 is provided with a high temperature resistant sealing gasket 22. The high temperature resistant sealing gasket 22 is an annular gasket that is embedded in the sealing groove at the bottom end of the retaining ring 20. The inner edge of the high temperature resistant sealing gasket 22 elastically abuts against the outer wall of the unlocking pressing block 9 to prevent foreign objects or asphalt mixture particles from entering the interior of the slide 18. The high temperature resistant sealing gasket 22 is made of fluororubber material, which can adapt to the high temperature environment of modified asphalt construction.

[0042] A pressure rod 25 is fixedly provided at the middle of the bottom end of the unlocking press block 9. The pressure rod 25 is a cylindrical rod extending vertically downward. Its lower end extends from the bottom end of the slide 18 and abuts against the top of the unlocking block 8061. Specifically, when the unlocking press block 9 is pressed, the pressure rod 25 pushes the unlocking block 8061 downward. A spring 3 21 is sleeved on the surface of the pressure rod 25. The spring 3 21 is a compression spring, which is located between the retaining ring 19 and the unlocking press block 9. It is used to provide an upward reset elastic force to the unlocking press block 9 (that is, when the operator releases the unlocking press block 9, the spring 3 21 pushes the unlocking press block 9 upward to reset).

[0043] In this embodiment, preferably, the surface of the positioning sleeve 1 is provided with an operating port 15 corresponding to the groove 3. The operating port 15 is used for inserting tools and rotating the locking nut 6 to adjust the height of the scraper strip 2. A cover 17 is installed on one side of the operating port 15 by screws. A high-temperature resistant sealing strip 16 is provided between the cover 17 and the operating port 15 to protect the screw 5 and the locking nut 6. With the high-temperature resistant sealing strip 16, foreign objects can be prevented from entering the interior of the positioning sleeve 1. Both the high-temperature resistant sealing strip 14 and the high-temperature resistant sealing strip 16 are made of fluororubber, which can adapt to the high-temperature environment of modified asphalt construction.

[0044] In use, align the two side sleeves 7 of the positioning sleeve 1 with the slots 10 on the two chains 11, so that the bottom opening of the sleeve 7 is directly opposite the top of the slot 10, and the opening on one side of the sleeve 7 is aligned with the outer chain plate of the chain 11. The operator slides the sleeve 7 into the slot 10 from top to bottom. As the sleeve 7 moves downward, the insert 801 fixed to the inner wall of the top of the sleeve 7 is inserted into the slot 12 at the top of the slot 10. The guide bevel 803 at the bottom of the insert 801 first contacts the limiting block 1305. As the insert block 801 continues to be inserted, the top rounded corner facing the slot 12, the guide bevel 803 exerts a horizontal pushing force on the limiting block 1305 through the bevel engagement, pushing the limiting block 1305 to retract horizontally to both sides (i.e. away from the slot 12). When the limiting block 1305 slides to both sides, the guide post 1303 slides into the circular groove 1306, and the spring 1304 is compressed between the cover plate 1301 and the limiting block 1305, with part of the spring coil entering the circular groove 1306.

[0045] After the end of the limiting block 1305 is completely withdrawn from the slot 12, the insert block 801 can continue to be inserted downwards. When the insert block 801 is inserted into place (i.e., the bottom end of the insert block 801 touches the bottom of the slot 12 or the sleeve 7 is fully fitted into the card holder 10), the limiting groove 802 and the limiting block 1305 are at the same horizontal position. At this time, the spring 1304 releases its elastic force, pushing the limiting block 1305 into the limiting groove 802 to achieve automatic locking and complete the installation.

[0046] After the paver has been running for a period of time, the bottom of the scraper blade 2 and the bottom plate of the hopper will wear due to long-term friction, and the gap will gradually increase, resulting in serious material return and insufficient material supply. At this time, stop the machine. First, use a screwdriver to unscrew the countersunk screws of the fixed cover 17, remove the cover 17, and expose the operating port 15. The operator can insert the tool (such as an open wrench) into the positioning sleeve 1 through the operating port 15. First, use the wrench to fix the locking nut 6 at the top of the support rod 4, then use another wrench to loosen the locking nut 6 at the bottom of the support rod 4, and then loosen the locking nut 6 at the top, so that both locking nuts 6 are in the loose state. At this time, the support rod 4 can slide freely up and down along the screw 5, and the scraper blade 2 moves up and down relative to the positioning sleeve 1.

[0047] The operator adjusts the scraper strip 2 to the appropriate position according to the required scraper extension length (i.e., the gap between the bottom end of the scraper strip 2 and the bottom plate of the hopper reaches the target value). A feeler gauge is inserted between the bottom end of the scraper strip 2 and the bottom plate of the hopper to measure the gap. The position of the scraper strip 2 is finely adjusted according to the measurement results until the gap value detected by the feeler gauge meets the target requirements. After adjustment, the locking nut 6 at the bottom end of the support rod 4 is tightened with a wrench, and then the locking nut 6 at the top end is tightened. The two locking nuts 6 clamp and fix the support rod 4 on the screw rod 5. The wedge-shaped washer between the locking nut 6 and the support rod 4 generates a wedge-shaped locking force during the tightening process, which effectively prevents the nut from loosening under vibration conditions. After adjustment, the cover 17 is re-fastened to the operating port 15, and the countersunk screw is tightened. The high-temperature resistant sealing strip 16 is pressed to form a seal. After adjustment, the operation can continue without replacing the scraper strip 2 or the bottom plate.

[0048] When the positioning sleeve 1 needs to be disassembled for replacement or maintenance, the operator simultaneously presses the two unlocking pressing blocks 9 at the top of the two side sleeves 7 of the positioning sleeve 1. After the unlocking pressing blocks 9 are pressed, they slide down along the slide 18, compressing the spring 21. The pressure rod 25 at the bottom of the unlocking pressing block 9 moves down, abutting against and pushing the unlocking block 8061 downward. After the unlocking block 8061 is pushed down, the spring 8064 is compressed and moves down along the lifting groove 804. During the downward movement of the guide bevel 8062 at the bottom of the unlocking block 8061, it contacts the top rounded corner of the limiting block 1305 facing the slot 12. The guide bevel 8062 generates a horizontal pushing force on the limiting block 1305 through the bevel cooperation, pushing the limiting block 1305 horizontally out of the limiting groove 802.

[0049] After the limit blocks 1305 on both sides are pushed out of the limit slots 802 at the same time, the insertion block 801 is no longer constrained by the limit. The operator lifts the sleeve 7 upwards, and the insertion block 801 can be smoothly removed from the slot 12. The sleeve 7 is separated from the card holder 10, completing the quick disassembly of the scraper assembly. After releasing the unlocking press block 9, the spring three 21 pushes the unlocking press block 9 upwards to reset, and the spring one 8064 pushes the unlocking block 8061 upwards to reset. Under the action of the spring two 1304, the limit block 1305 extends back into the slot 12, and the entire quick insertion mechanism 8 and the limit mechanism 13 automatically return to the ready-to-install state.

[0050] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable scraper device for a modified asphalt paver, comprising a positioning sleeve (1), scraper strips (2), and two spaced chains (11), characterized in that: The positioning sleeve (1) is slidably connected to the scraper strip (2). Support rods (4) are fixed on both sides of the top of the scraper strip (2). Screws (5) that are inserted and connected to the support rods (4) are fixed on both sides of the top of the positioning sleeve (1). Locking nuts (6) that are threadedly connected to the screws (5) are provided at the top and bottom of the support rods (4). Sleeves (7) are fixed on both sides of the positioning sleeve (1). Card seats (10) are fixed on one side of both chains (11). Slots (12) are opened at the top of the card seats (10). Quick insertion mechanism (8) is provided on the inner wall of the top of the card sleeve (7). Unlocking pressing block (9) corresponding to the quick insertion mechanism (8) is provided at the top of the card sleeve (7). Limiting mechanisms (13) for limiting the quick insertion mechanism (8) are provided on both sides of the card seats (10).

2. The adjustable scraper device for a modified asphalt paver according to claim 1, characterized in that: The quick-connect mechanism (8) includes a plug (801), which is internally engaged with the slot (12). The top of the plug (801) is fixedly connected to the inner wall of the top of the sleeve (7). The bottom of both sides of the plug (801) is provided with a guide bevel (803). The middle of both sides of the plug (801) is provided with a limit groove (802). The middle of the top of the plug (801) is provided with an unlocking component (806).

3. The adjustable scraper device for a modified asphalt paver according to claim 2, characterized in that: The unlocking component (806) includes an unlocking block (8061). A lifting groove (804) communicating with a limiting groove (802) is provided at the center of the top of the insertion block (801). The unlocking block (8061) is slidably connected to the lifting groove (804). Guide grooves (805) are provided on both sides of the lifting groove (804). Guide blocks (8063) slidably connected to the guide grooves (805) are fixedly provided on both sides of the unlocking block (8061). The bottom of the unlocking block (8061) is provided with guide bevels (8062) on both sides. The bottom of the unlocking block (8061) is provided with a vertically arranged spring (8064). Both ends of the spring (8064) are engaged with spring posts (8065). The top spring post (8065) ​​of the spring (8064) is fixedly connected to the middle of the bottom of the unlocking block (8061). The bottom spring post (8065) ​​of the spring (8064) is fixedly connected to the bottom of the lifting groove (804).

4. The adjustable scraper device for a modified asphalt paver according to claim 2, characterized in that: The limiting mechanism (13) includes a cover plate (1301) and a limiting block (1305). A guide sleeve (1302) is fixedly provided on one side of the cover plate (1301). A guide post (1303) is slidably connected to the guide sleeve (1302). A circular groove (1306) is opened on one side of the limiting block (1305). One end of the guide post (1303) is fixed in the circular groove (1306). The same spring (1304) is sleeved on the surface of the guide sleeve (1302) and the guide post (1303). The spring (1304) provides elastic support to the limiting block (1305) in the direction of the limiting groove (802). The circular groove (1306) is used to provide compression space for the spring (1304). The top and bottom of the other side of the limiting block (1305) are both provided with rounded corners. Both sides of the card holder (10) are provided with sliding grooves (23) that communicate with the inside of the slot (12). The limiting block (1305) is slidably connected to the inside of the sliding groove (23). One side of the sliding groove (23) is provided with a receiving groove. The cover plate (1301) is installed in the receiving groove through countersunk holes and screws to prevent the cover plate (1301) and screws from protruding from the side of the card holder (10).

5. The adjustable scraper device for a modified asphalt paver according to claim 3, characterized in that: The top of the sleeve (7) is provided with a slide (18), the unlocking press block (9) is slidably connected to the inside of the slide (18), the bottom of the slide (18) is fixedly provided with a retaining ring (19), the top of the slide (18) is provided with a retaining ring (20), the unlocking press block (9) is located at the bottom of the retaining ring (20), the bottom of the retaining ring (20) is provided with a high temperature resistant sealing gasket (22) to prevent foreign objects from entering the slide (18), the middle of the bottom of the unlocking press block (9) is fixedly provided with a pressure rod (25), the pressure rod (25) abuts against the top of the unlocking block (8061), the surface of the pressure rod (25) is sleeved with a spring (21), the spring (21) is located between the retaining ring (19) and the unlocking press block (9).

6. The adjustable scraper device for a modified asphalt paver according to claim 1, characterized in that: The sleeve (7) is engaged with the surface of the card holder (10). The sleeve (7) has an open bottom structure and is used to be vertically sleeved on the outer surface of the card holder (10). The sleeve (7) also has an opening on one side for fitting with the outer chain plate on one side of the chain (11).

7. The adjustable scraper device for a modified asphalt paver according to claim 1, characterized in that: The bottom end of the positioning sleeve (1) is provided with a scraper mounting groove (24). The top end of the scraper strip (2) is inserted into the scraper mounting groove (24) and slidably engaged with the positioning sleeve (1). The scraper mounting groove (24) is a rectangular groove, and its inner wall contour is adapted to the outer wall of the scraper strip (2) to form a vertical sliding guide fit. A high-temperature resistant sealing strip (14) is embedded at the bottom of the scraper mounting groove (24). Grooves (3) are opened on both sides of the top end of the scraper strip (2). The support rod (4) is fixedly connected to the top of the groove (3) to provide installation space for the bottom locking nut (6), and the top surface of the support rod (4) is at the same level as the top of the scraper strip (2). The support rod (4) has a rod groove on its surface, and the screw (5) passes through the rod groove and can slide relative to it. A wedge-shaped washer is provided between the locking nut (6) and the support rod (4). The wedge-shaped washer is a wedge-shaped anti-loosening washer with two inclined surfaces in opposite directions, which has an anti-loosening locking function.

8. The adjustable scraper device for a modified asphalt paver according to claim 7, characterized in that: The surface of the positioning sleeve (1) is provided with an operating port (15) corresponding to the groove (3), which is used to rotate the locking nut (6) through the operating port (15) to adjust the height of the scraper strip (2). A cover (17) is installed on one side of the operating port (15) by screws. A second high-temperature resistant sealing strip (16) is provided between the cover (17) and the operating port (15) to prevent foreign objects from entering the interior of the positioning sleeve (1). Both the first high-temperature resistant sealing strip (14) and the second high-temperature resistant sealing strip (16) are made of fluororubber.

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