Automatic operation equipment for side slope forming and surface finishing
By designing the tracks, scraping and sprinkler mechanisms of automated operating equipment, the problems of inconvenient operation and insufficient sprinkling of slope forming and surface collection equipment are solved, and the rapid flattening and automatic sprinkling of the concrete surface of the slope is achieved, which reduces labor intensity and improves construction efficiency and surface smoothness.
Patent Information
- Application Number
- CN202510735964.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-04
- Publication Date
- 2025-08-12
AI Technical Summary
In the prior art, slope forming surface finishing equipment is inconvenient to operate and cannot be sprinkled automatically, resulting in high labor intensity, high time consumption and cumbersome work.
An automated operating equipment including tracks, scraping mechanisms and sprinkler mechanisms is designed. Through the cooperation of tracks and scraping mechanisms, the concrete is quickly smoothed, and water is automatically sprinkled during the smoothing process through the sprinkler mechanism. The power mechanism and booster components are used to realize the booster spraying in the water tank.
It realizes rapid flattening and automatic sprinkling of slope concrete surfaces, reduces labor intensity, improves construction efficiency and surface smoothness.
Smart Images

Figure CN120465494A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of slope protection, and in particular to an automated operating device for slope forming and finishing. Background Art
[0002] In the process of slope protection, a layer of concrete protection surface is often laid on the surface of the slope. In order to ensure the flatness of the slope surface, the slope needs to be trimmed when the concrete is poured on the slope surface so that it can be shaped and the concrete layer maintains a certain thickness and surface smoothness.
[0003] At present, when forming and finishing the slope, the commonly used method is manual finishing, in which workers gradually smooth the concrete surface. This method is not only labor-intensive, but also takes a lot of time, which is not conducive to speeding up the construction period. Moreover, when smoothing the concrete, in order to ensure the smoothness of the surface, it is necessary to sprinkle water into the artificial concrete, which increases the tediousness of the work. For this reason, this scheme proposes an automated operating equipment for slope forming and finishing. Summary of the Invention
[0004] The present invention provides an automatic operating device for slope forming and finishing, which solves the problems of inconvenient operation and inability to automatically sprinkle water in the slope forming and finishing devices in the prior art.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] An automated operating device for slope forming and finishing, comprising:
[0007] The track comprises a fixed plate and two side plates detachably fixed to one long side of the fixed plate, and two limit plates arranged along the length direction of the two side plates are fixed to the outer side walls of the two side plates;
[0008] The scraping mechanism includes a scraper slidably connected to the top surfaces of the two side plates and a guide plate fixed to the long side of the scraper close to the fixed plate. The bottom of the guide plate is equipped with two limiting mechanisms for limiting the sliding of the guide plate along the length direction of the side plates.
[0009] The power mechanism is provided in two pieces and is respectively located on the outside of the two side plates. The power mechanism includes a fixing frame fixed to the outer wall of the fixing plate on the side where the side plates are mounted, a motor mounted on the top surface of the scraper, a take-up wheel sleeved on the output shafts of the two motors, a pull rope wound around the outer circumference of the take-up wheel, and a wire assembly mounted on the scraper. The fixing frame is located on the outside of the side plate, one end of the pull rope is tensioned by the wire assembly and then fixed to the fixing frame. The top surface of the scraper is also mounted with an operating panel connected to the motor.
[0010] The sprinkler mechanism includes a sprinkler pipe fixed to the bottom surface of the guide plate along its length direction, a water tank installed on the top surface of the scraper, and a booster assembly. A water pipe connected to the sprinkler pipe is installed at the bottom of one side of the water tank. The booster assembly is connected to the output shaft of the motor of one of the power mechanisms to increase the pressure in the water tank when the scraper approaches the fixed plate. A plurality of water spray pipes are installed on the bottom surface of the sprinkler pipe.
[0011] Through the above technical solution, not only can the slope be quickly and conveniently trimmed when it is formed, but water can also be automatically sprayed into the concrete while the scraper moves, thereby making the scraped slope smoother and flatter.
[0012] As a further improvement of the above scheme, two limiting mechanisms are respectively located on the outside of the two side plates, and the limiting mechanisms include a mounting block fixed on the bottom surface of the scraper and a roller rotatably connected to the outer wall of the mounting block close to the side plate, and the top surface of the roller abuts against the bottom surface of a limiting plate on the upper part of the side plate.
[0013] Through the above technical solution, the scraper can slide stably on the top surface of the side plate without falling off the side plate.
[0014] As a further improvement of the above solution, the wire assembly includes a first wire wheel and a second wire wheel installed on the top surface of the scraper. The pull rope passes through the top surface of the first wire wheel and then through the second wire wheel and is fixed to the fixed frame.
[0015] Through the above technical solution, the pull rope can be guided and tensioned.
[0016] As a further improvement of the above scheme, the boosting assembly includes an air cylinder fixed on the outer wall of one side of the water tank, a piston plate arranged in the air cylinder, a piston rod fixed on the outer wall of one side of the piston plate, a driven gear rotatably connected to the top surface of the scraper, and a driving gear sleeved on the outer periphery of the output shaft of one of the motors, the driving gear is meshed with the driven gear, one end of the piston rod extends to the outside of the air cylinder and is fixed with a movable frame, a toggle column is fixed at a position deviating from the center of the circular surface of one side of the driven gear, one end of the toggle column is engaged with the inner side of the movable frame and slides with it, an air inlet pipe and an air supply pipe are fixed to the outer periphery of the air cylinder, and a one-way valve is installed on both the air inlet pipe and the air supply pipe, and the other end of the air supply pipe extends into the water tank.
[0017] Through the above technical solution, the boosting component can be driven to work by the rotation of the motor, thereby increasing the pressure in the water tank so that the water in the water tank can be discharged outward.
[0018] As a further improvement of the above solution, the length of the inner ring of the movable frame is greater than the diameter of the driven gear, and the outer periphery of the shifting column abuts against the inner walls of the two long sides of the movable frame.
[0019] Through the above technical solution, the rotation of the driven gear can be used to drive the movable frame to move back and forth.
[0020] As a further improvement of the above solution, an air release pipe is fixed on the air supply pipe, a first valve is installed on the air release pipe, and a second valve is installed on the water supply pipe.
[0021] Through the above technical solution, after the air vent pipe is opened, the air in the air supply pipe can be discharged through the air vent pipe and will not enter the water tank, and the setting of the second valve can control the on and off of the water supply pipe.
[0022] As a further improvement of the above-mentioned scheme, the water tank is equipped with an adjusting mechanism for opening and closing the first valve and the second valve. The adjusting mechanism includes a first connecting gear sleeved on the outer periphery of the valve stem of the first valve, a second connecting gear sleeved on the outer periphery of the valve stem of the second valve, and an adjusting rack provided on the outer wall of one side of the water tank. The first connecting gear and the second connecting gear are both engaged with the adjusting rack. A plurality of limiting rings are movably sleeved on the outer periphery of the adjusting rack, and the limiting rings are fixed on the outer wall of the water tank.
[0023] With the above technical solution, it is convenient to close the second valve while opening the first valve, and to open the second valve while closing the first valve.
[0024] As a further improvement of the above solution, a pedal arranged along the length direction of the scraper is fixed to the side of the top surface of the scraper away from the guide plate.
[0025] The above technical solution makes it convenient for workers to stand on the scraper.
[0026] Compared with the prior art, the present invention has the following beneficial effects:
[0027] 1. Through the cooperation between the track, scraper mechanism and sprinkler mechanism, the concrete can be quickly and conveniently smoothed when finishing the slope, and water can be automatically sprinkled into the concrete before smoothing, so that the slope surface after smoothing is smoother.
[0028] 2. By setting the adjustment mechanism, the first valve and the second valve can be opened and closed at the same time, so that the sprinkler mechanism can sprinkle water as needed. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 A perspective view of the present invention;
[0030] Figure 2 for Figure 1 Schematic diagram of the structure of the middle scraper and wire taking-up mechanism;
[0031] Figure 3 for Figure 2Enlarged view of point A in the middle;
[0032] Figure 4 It is a structural diagram of the scraping mechanism;
[0033] Figure 5 This is a schematic structural diagram of the pull rope, track and scraping mechanism of the present invention;
[0034] Figure 6 for Figure 5 Enlarged view of point B in the middle.
[0035] Description of main symbols:
[0036] 1. Fixed plate; 2. Side plate; 3. Scraper; 4. Guide plate; 5. Pedal; 6. Sprinkler pipe; 7. Operation panel; 8. Water tank; 9. Mounting block; 10. Limit plate; 11. Pull rope; 12. Fixed frame; 13. First guide pulley; 14. Second guide pulley; 15. Motor; 16. Driving gear; 17. Driven gear; 18. Movable frame; 19. Air cylinder; 20. Water supply pipe; 21. Air release pipe; 22. First valve; 23. First connecting gear; 24. Water pipe; 25. Air pipe; 26. Inlet pipe; 27. Piston rod; 28. Toggle column; 29. Take-up wheel; 30. Sprinkler pipe; 31. Roller; 32. Adjustment rack; 33. Limit ring; 34. Second connecting gear; 35. Second valve. DETAILED DESCRIPTION
[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.
[0038] Example 1:
[0039] Please combine Figure 1-6 , an automated operation device for slope forming and finishing of this embodiment includes:
[0040] The track includes a fixed plate 1 and two side plates 2 detachably fixed on the long side of one side of the fixed plate 1. Two limiting plates 10 arranged along the length direction are fixed on the outer walls of the two side plates 2. The two limiting plates 10 on the outer wall of the same side plate 2, one limiting plate 10 is flush with the top surface of the side plate 2, and the other limiting plate 10 is flush with the bottom surface of the side plate 2. The lower limiting plate 10 can increase the stability of the side plate 2, so that the side plate 2 will not easily tip over when placed on a slope.
[0041] The scraper mechanism includes a scraper 3 slidingly connected to the top surfaces of the two side plates 2 and a guide plate 4 fixed on the long side of the scraper 3 near the fixed plate 1. The bottom of the guide plate 4 is equipped with two limit mechanisms for limiting the sliding of the guide plate 4 along the length direction of the side plates 2. The two limit mechanisms are respectively located on the outer sides of the two side plates 2. The limit mechanism includes a mounting block 9 fixed to the bottom surface of the scraper 3 and a roller 31 rotatably connected to the outer wall of the mounting block 9 near the side plate 2. The top surface of the roller 31 abuts against the bottom surface of a limit plate 10 on the upper part of the side plate 2. When trimming the slope, the track is placed along the slope surface and the fixed plate 1 is ensured to be set upward. Then, the concrete material is poured between the two side plates 2. When the scraper 3 moves along the length direction of the side plates 2 toward the side close to the fixed plate 1, the roller 31 slides along the bottom surface of the limit plate 10 to ensure that the scraper 3 does not fall off the side plates 2. At the same time, the scraper 3 can also smooth the concrete material between the two side plates 2 when moving.
[0042] The power mechanism is provided in two pieces and is located on the outside of the two side plates 2. The power mechanism includes a fixed frame 12 fixed to the outer wall of the fixed plate 1 on the side where the side plates 2 are installed, a motor 15 installed on the top surface of the scraper 3, a take-up wheel 29 sleeved on the output shafts of the two motors 15, a pull rope 11 wound around the outer periphery of the take-up wheel 29, and a wire assembly installed on the scraper 3. The fixed frame 12 is located on the outside of the side plate 2. The wire assembly includes a first wire wheel 13 and a second wire wheel 14 installed on the top surface of the scraper 3. The pull rope 11 passes through the top surface of the first wire wheel 13 and then passes through the second wire wheel. 14 is then fixedly connected to the fixed frame 12, and an operation panel 7 connected to the motor 15 is also installed on the top surface of the scraper 3. The input end of the motor 15 is electrically connected to the output end of the operation panel 17. The start and stop of the motor 15 can be controlled by the operation panel 17. The pull rope 11 is guided and tensioned by the first wire wheel 13 and the second wire wheel 14, and then wound on the take-up wheel 29. The motor 15 is started to rotate forward through the operation panel 7. After the motor 15 rotates forward, it drives the take-up wheel 29 to rotate forward, thereby gradually winding the pull rope 11 onto the take-up wheel 29, so that the scraper 3 can be driven to approach the side of the fixed plate 1 along the length direction of the side plate 2.
[0043] The watering mechanism includes a watering pipe 6 fixed to the bottom surface of the guide plate 4 along the length direction, a water tank 8 installed on the top surface of the scraper 3, and a booster assembly. A water pipe 24 connected to the watering pipe 6 is installed at the bottom of one side of the water tank 8. The booster assembly is connected to the output shaft of the motor 15 of one of the power mechanisms to increase the pressure in the water tank 8 when the scraper 3 approaches the fixed plate 1. A water adding pipe 20 is installed on the top of the water tank 8. A sealing cover is installed on the water adding pipe 20. Water can be added to the water tank 8 through the water adding pipe 20. A plurality of water spray pipes 30 are installed on the bottom surface of the watering pipe 6. The booster assembly includes a plurality of water spray pipes 30. The air cylinder 19 is fixed on the outer wall of one side of the water tank 8, a piston plate is arranged in the air cylinder 19, a piston rod 27 is fixed on the outer wall of one side of the piston plate, a driven gear 17 is rotatably connected to the top surface of the scraper 3, and a driving gear 16 is sleeved on the outer periphery of the output shaft of one of the motors 15. The driving gear 16 is engaged with the driven gear 17, and one end of the piston rod 27 extends to the outside of the air cylinder 19 and is fixed with a movable frame 18. A toggle column 28 is fixed at a position where the circular surface of one side of the driven gear 17 deviates from the center of the circle. One end of the toggle column 28 is engaged with the inner side of the movable frame 18 and slides with it. The length of the inner ring of the movable frame 18 is greater than the diameter of the driven gear 17. The outer periphery of the toggle column 28 abuts against the inner walls of the long sides of the movable frame 18. The outer periphery of the air cylinder 19 is fixed with an air intake pipe 26 and an air delivery pipe 25, and a one-way valve is installed on both the air intake pipe 26 and the air delivery pipe 25. The other end of the air delivery pipe 25 extends into the water tank 8. When the motor 15 is started, it drives the driving gear 16 to rotate at the same time. After the driving gear 16 rotates, it drives the driven gear 17 to rotate. After the driven gear 17 rotates, it can drive the toggle column 28 to rotate synchronously, and after the toggle column 28 rotates, it can drive the movable The frame 18 moves back and forth left and right, and the movable frame 18 drives the piston rod 27 and the piston plate to move synchronously, so that the outside air can be sucked into the inside of the air cylinder 16 through the air inlet pipe 26, and then pressed into the air supply pipe 25 through the air cylinder 16, and finally input into the water tank 8 through the air supply pipe 25, thereby increasing the pressure in the water tank 8. After the pressure in the water tank 8 increases, the water in the water tank 8 can be input into the sprinkler pipe 6 through the water supply pipe 24, and finally the water in the sprinkler pipe 6 is sprayed out from the water spray pipe 30, thereby adding water to the concrete material, so that the scraper 3 can scrape the surface of the concrete material more smoothly.
[0044] An air release pipe 21 is also fixed to the air supply pipe 25, and a first valve 22 is installed on the air release pipe 21. A second valve 35 is installed on the water supply pipe 24. The setting of the air release pipe 21 can discharge the air in the air supply pipe 25 to the outside. After opening the first valve 22, the air in the water supply pipe 24 can be discharged through the air release pipe 21, so that the air in the air supply pipe 25 will not enter the water tank 8, and the water in the water tank 8 will not be pressed into the sprinkler pipe 6. After the second valve 35 is closed, the water in the water tank 8 will not be discharged through the water supply pipe 24.
[0045] The working principle of this embodiment is as follows: when constructing a slope, the track is laid along the slope surface with the fixed plate 1 at the top. Then, the scraper mechanism is placed at the bottom of the track. Then, concrete is poured between the two side plates 2. After the concrete is laid, the two motors 15 are started to rotate forward through the operation panel 7. After the motors 15 rotate forward, the pull rope 11 is wound on the take-up wheel 29, thereby driving the scraper 3 to move closer to the fixed plate 1 along the length direction of the side plates 2, thereby smoothing the concrete between the two side plates 2.
[0046] When it is necessary to level the concrete material and sprinkle water on the concrete material at the same time, the first valve 22 can be closed and the second valve 35 can be opened before starting the motor 15. After that, the motor 15 is started to rotate forward, and the motor 15 drives the driving gear 16 to rotate at the same time. After the driving gear 16 rotates, it drives the driven gear 17 to rotate. After the driven gear 17 rotates, it can drive the toggle column 28 to rotate synchronously. After the toggle column 28 rotates, it can drive the movable frame 18 to move back and forth left and right. The movable frame 18 then drives the piston rod 27 and the piston plate to move synchronously. When the piston plate moves toward the side close to the driven gear 17, the outside air can be sucked into the inside of the air cylinder 16 through the air inlet pipe 26. When the piston plate moves toward the side away from the driven gear 17, the air in the air cylinder 16 can be pressed into the air supply pipe 25, and finally input into the water tank 8 through the air supply pipe 25, thereby increasing the pressure in the water tank 8. After the pressure in the water tank 8 increases, the water in the water tank 8 can be input into the sprinkler pipe 6 through the water supply pipe 24, and finally the water in the sprinkler pipe 6 is sprayed out from the water spray pipe 30, thereby adding water to the concrete material.
[0047] Example 2:
[0048] Combine Figure 5 - Figure 6Based on Example 1, this embodiment is further improved in that: an adjustment mechanism for opening and closing the first valve 22 and the second valve 35 is installed on the water tank 8, and the adjustment mechanism includes a first connecting gear 23 sleeved on the outer periphery of the valve stem of the first valve 22, a second connecting gear 34 sleeved on the outer periphery of the valve stem of the second valve 35, and an adjustment rack 32 provided on the outer wall of one side of the water tank 8, the first connecting gear 23 and the second connecting gear 34 are both engaged with the adjustment rack 32, and a plurality of limit rings 33 are movably sleeved on the outer periphery of the adjustment rack 32, and the limit rings 33 are fixed to the outer wall of the water tank 8. By moving the adjustment rack 32, the first connecting gear 23 and the second connecting gear 34 can be driven to rotate synchronously, so that the opening and closing of the first valve 22 and the second valve 35 can be controlled simultaneously by relying on the adjustment rack 32. When the adjustment rack 32 descends, the first valve 22 can be closed and the second valve 35 can be opened at the same time. Conversely, when the adjustment rack 32 rises, the first valve 22 can be opened and the second valve 35 can be closed.
[0049] The working principle of this embodiment is as follows: when the water in the water tank 8 needs to be input into the sprinkler pipe 6, the adjusting rack 32 is pressed down, and the adjusting rack 32 drives the first connecting gear 23 and the second connecting gear 34 to rotate forward, thereby closing the first valve 22 and opening the second valve 35, so that the air in the air pipe 25 enters the water tank 8. Then, after the air pressure in the water tank 8 increases, the water in the water tank 8 enters the sprinkler pipe 6 through the water pipe 24. When the adjusting rack 32 is moved upward again to return to its original position, the first connecting gear 23 and the second connecting gear 34 can be driven to rotate reversely, thereby opening the first valve 22 and closing the second valve 35. The air in the air pipe 25 will be discharged through the vent pipe 21 without entering the water tank 8, and the water in the water tank 8 cannot be discharged through the water pipe 24.
[0050] Example 3:
[0051] Combine Figure 1 - Figure 2 and Figure 4 - Figure 5 Based on Example 1, this embodiment is further improved in that a pedal 5 arranged along the length direction of the scraper 3 is fixed on the side of the top surface away from the guide plate 4.
[0052] The implementation principle of this embodiment is: when trimming the slope, since the slope has a certain inclination, the scraper 3 will also maintain the same inclination as the slope, and the setting of the pedal 5 provides a support for the worker when standing on the scraper 3, preventing the worker from sliding up and down the inclined scraper 3.
[0053] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.
Claims
1. An automated operating device for slope forming and finishing, characterized in that: include: The track comprises a fixed plate and two side plates detachably fixed to one long side of the fixed plate, and two limit plates arranged along the length direction of the two side plates are fixed to the outer side walls of the two side plates; The scraping mechanism includes a scraper slidably connected to the top surfaces of the two side plates and a guide plate fixed to the long side of the scraper close to the fixed plate. The bottom of the guide plate is equipped with two limiting mechanisms for limiting the sliding of the guide plate along the length direction of the side plates. The power mechanism is provided in two pieces and is respectively located on the outside of the two side plates. The power mechanism includes a fixing frame fixed to the outer wall of the fixing plate on the side where the side plates are mounted, a motor mounted on the top surface of the scraper, a take-up wheel sleeved on the output shafts of the two motors, a pull rope wound around the outer circumference of the take-up wheel, and a wire assembly mounted on the scraper. The fixing frame is located on the outside of the side plate, one end of the pull rope is tensioned by the wire assembly and then fixed to the fixing frame. The top surface of the scraper is also mounted with an operating panel connected to the motor. The sprinkler mechanism includes a sprinkler pipe fixed to the bottom surface of the guide plate along its length direction, a water tank installed on the top surface of the scraper, and a booster assembly. A water pipe connected to the sprinkler pipe is installed at the bottom of one side of the water tank. The booster assembly is connected to the output shaft of the motor of one of the power mechanisms to increase the pressure in the water tank when the scraper approaches the fixed plate. A plurality of water spray pipes are installed on the bottom surface of the sprinkler pipe.
2. The automated operation equipment for slope forming and finishing according to claim 1, characterized in that: The two limiting mechanisms are respectively located on the outside of the two side plates. The limiting mechanisms include a mounting block fixed to the bottom surface of the scraper and a roller rotatably connected to the outer wall of the mounting block close to the side plate. The top surface of the roller abuts the bottom surface of a limiting plate on the upper part of the side plate.
3. The automated operation equipment for slope forming and finishing according to claim 1, characterized in that: The wire assembly includes a first wire wheel and a second wire wheel installed on the top surface of the scraper. The pull rope passes through the top surface of the first wire wheel and then passes through the second wire wheel and is fixed to the fixing frame.
4. The automated operation equipment for slope forming and finishing according to claim 1, characterized in that: The boosting assembly includes an air cylinder fixed on the outer wall of one side of the water tank, a piston plate arranged in the air cylinder, a piston rod fixed on the outer wall of one side of the piston plate, a driven gear rotatably connected to the top surface of the scraper, and a driving gear sleeved on the outer periphery of the output shaft of one of the motors, the driving gear is meshed with the driven gear, one end of the piston rod extends to the outside of the air cylinder and is fixed with a movable frame, a toggle column is fixed at a position where the circular surface of one side of the driven gear deviates from the center of the circle, one end of the toggle column is engaged with the inner side of the movable frame and slides therewith, an air inlet pipe and an air delivery pipe are fixed to the outer periphery of the air cylinder, and a one-way valve is installed on both the air inlet pipe and the air delivery pipe, and the other end of the air delivery pipe extends into the water tank.
5. The automated operation equipment for slope forming and finishing according to claim 4, characterized in that: The length of the inner ring of the movable frame is greater than the diameter of the driven gear, and the outer periphery of the shifting column abuts against the inner walls of the long sides of both sides of the movable frame.
6. The automated operation equipment for slope forming and finishing according to claim 4, characterized in that: An air release pipe is also fixed on the air delivery pipe, a first valve is installed on the air release pipe, and a second valve is installed on the water delivery pipe.
7. The automated operation equipment for slope forming and finishing according to claim 6, characterized in that: The water tank is equipped with an adjusting mechanism for opening and closing the first valve and the second valve. The adjusting mechanism includes a first connecting gear sleeved on the outer periphery of the valve stem of the first valve, a second connecting gear sleeved on the outer periphery of the valve stem of the second valve, and an adjusting rack provided on the outer wall of one side of the water tank. The first connecting gear and the second connecting gear are both engaged with the adjusting rack. A plurality of limiting rings are movably sleeved on the outer periphery of the adjusting rack, and the limiting rings are fixed to the outer wall of the water tank.
8. The automated operation equipment for slope forming and finishing according to claim 1, characterized in that: A pedal arranged along the length direction of the scraper is fixed on one side of the top surface of the scraper away from the guide plate.