Slurry scraping device for pouring type semi-flexible pavement

Abstract

The invention relates to the technical field of slurry scraping devices, and discloses a slurry scraping device for a pouring type semi-flexible pavement, the slurry scraping device comprises a slurry scraping plate connected with a moving frame, the slurry scraping plate comprises a plate body, a moving part and an inserting part, the plate body is provided with a cavity penetrating through the top surface of the plate body, the plate body is made of a material with elastic deformation capacity, and the plate body is fixedly connected with the moving frame; the moving part is connected to the moving frame and located above the plate body, the inserting parts are connected with the moving part, the number of the inserting parts is the same as that of the cavities, the inserting parts are driven by the moving part to move up and down and are movably inserted into the cavities, and the moving part drives the inserting parts to move to different positions of the cavities. The size of a gap formed between the cavity wall of the cavity and the end of the inserting part is changed, the moving part can drive the inserting part to be completely inserted into the cavity to fill the cavity, the rigidity of the slurry scraping plate is changed by changing the size of the gap between the cavity wall of the cavity and the end of the inserting part, and the size of the gap is linearly changed. Therefore, the rigidity of the slurry scraping plate can be linearly changed.

Description

Technical Field

[0001] The present invention relates to the technical field of scraping devices, in particular to a scraping device for a poured-type semi-flexible road surface. Background Art

[0002] The poured semi-flexible pavement technology is to pour high-performance slurry into a flexible large-void asphalt mixture (void ratio 20%~30%) to form a rigid-flexible composite pavement. It has the beauty and comfort of an asphalt pavement while having the stiffness and stability of a cement concrete pavement, fundamentally solving the problem of deformation diseases of asphalt pavements.

[0003] However, for sections with large longitudinal slopes, such as those in the hilly and mountainous areas of Jiangxi Province, when using poured semi-flexible pavement technology, the fluidity of the slurry makes it difficult to fully pour the surface, and there is a risk of surface leakage and roughness in the later stage, which affects the appearance and service life. To solve this problem, relevant research on poured semi-flexible pavement technology for sections with large longitudinal slopes was carried out, and this construction method was summarized and formed, and achieved good results in engineering applications. For working conditions with large slopes in mountainous areas, we currently use a "two-stage grouting" construction process, which means that after the base large-void asphalt mixture is paved, in stage one, slurry I with low fluidity is first poured into the base large-void asphalt mixture. In stage two, before slurry I begins to set, slurry II with high fluidity is poured and scraped onto the surface of the base large-void asphalt mixture.

[0004] After each grouting is completed, a scraping device is required to level the surface. The actuators of the scraping devices currently used are mostly scraping plates. However, in the two-stage grouting method for mountain roads with large longitudinal slopes, since two groutings are required and the fluidity of the slurry in the two groutings is different, and the stiffness of the traditional scraping plate is fixed, the scraping stiffness of the two stages is consistent. The low-fluidity slurry in stage one has a high viscosity, and the shear thinning property of the slurry is significant. The greater the shear rate of the slurry, the greater the shear stress. The fixed gap between the traditional scraping plate and the slurry causes the local shear rate to be too high, causing damage to the internal structure of the slurry. At the same time, the fixed stiffness scraping plate hardly undergoes elastic deformation when subjected to the viscosity of the slurry, resulting in uneven contact pressure distribution (edge pressure > center pressure 30-50%). Hard shear rather than sliding shear is formed between the slurry and the scraping plate. This will eventually lead to the phenomenon of viscous pulling; in the second stage, the shear yield stress of the high-fluidity slurry is extremely low, and it is easy to flow unconstrained under shear. When the scraper blade advances, a high-pressure area is formed at the front end, while the two sides are at atmospheric pressure, resulting in a lateral pressure gradient. The gap between the traditional fixed-rigidity scraper blade and the base layer is fixed (usually 0.5-1mm), and it cannot adaptively shrink under the impact of the slurry. According to the law of flow conservation: if the gap between the scraper blade and the base layer increases by 10%, the lateral flow increases by 33%. The edge of the scraper blade with fixed stiffness is usually a right angle, which causes the streamline to turn suddenly and induces flow separation. The eddy current energy loss at the right-angle edge accounts for 15-20% of the total. In addition, due to the high frequency of the high-fluidity slurry impacting the scraper blade, when it is close to the natural frequency of the scraper blade, high-frequency hydraulic fluctuations will be generated. The resonance of the traditional scraper blade with it will cause "corrugated" scratches. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a pouring type semi-flexible pavement scraping device, which can ensure that the scraping stiffness and slurry fluidity are coordinated during the scraping process at each stage, thereby improving the scraping effect.

[0006] The present invention provides a pouring type semi-flexible pavement scraping device, comprising a scraping plate connected to a movable frame, the scraping plate comprising: The plate body has a cavity running through its top surface, the plate body is made of a material with elastic deformation capability, and the plate body is fixedly connected to the moving frame; The moving part is connected to the moving frame and is located above the plate body; The plug-in part is connected to the movable part and has the same number as the cavities. The plug-in part is driven up and down by the movable part and is movably inserted into the cavity. The movable part drives the plug-in part to move to different positions of the cavity to change the size of the gap formed between the cavity wall and the end of the plug-in part. The movable part can drive the plug-in part to be completely inserted into the cavity to fill the cavity.

[0007] Optionally, there are multiple cavities, which are arranged side by side along the transverse direction of the plate body, and the two opposite side walls of the cavity are inclined from top to bottom so that the cavity is closed from top to bottom, and the outer contour of the plug-in part matches the inner contour of the cavity.

[0008] Optionally, the plug-in part includes: a main body, a spring and an extension plate, and a receiving groove is opened on both sides of the inclined main body. One end of the spring is fixed to the bottom of the receiving groove, and the other end of the spring is connected to one side of the extension plate, and the other side of the extension plate abuts the inclined side wall of the cavity.

[0009] Optionally, a sliding groove cooperating with the extension plate is provided on the inclined side wall of the cavity.

[0010] Optionally, the bottom of the cavity has a slot, and the bottom of the plug-in portion is connected to a plug-in board that matches the slot.

[0011] Optionally, the mobile portion includes: A bracket, fixedly connected to the mobile frame; The motor is fixed to the bracket; The lead screw and nut assembly has one end of a lead screw connected to the motor, the other end of the lead screw of the lead screw and nut assembly is rotatably connected to the bracket, and the nut of the lead screw and nut assembly is connected to the main body.

[0012] Optionally, the initial position of the nut of the screw-nut assembly is different, the nut is fixed with a fixing sleeve, the fixing sleeve is sleeved on the screw, and the bottom of the fixing sleeve is fixedly connected to the main body.

[0013] Optionally, all the plug-in parts are divided into multiple groups, each group contains no less than three plug-in parts, and the initial positions of the plug-in parts at corresponding positions of each group are consistent.

[0014] Optionally, the moving part further includes a pulley and a belt connected thereto for transmission, each lead screw is fixedly connected to a pulley, a plurality of pulleys are connected through belt transmission, and an output shaft of the motor is connected to the pulley.

[0015] Optionally, two adjacent nuts are connected by a telescopic rod, and both ends of the telescopic rod are rotatably connected to the nuts.

[0016] The technical solution provided by the embodiment of the present invention has the following advantages compared with the existing technology: A scraper device for a poured semi-flexible pavement provided by an embodiment of the present invention selects a material for the plate body that can produce elastic deformation, and opens a cavity on the plate body, and the cavity passes through the top surface of the plate body, so that the interior of the plate body is changed from the original solid structure to a hollow structure, and a matching plug-in portion is provided for the cavity, and the plug-in portion is driven to move by the moving portion, thereby changing the depth of the plug-in portion inserted into the cavity, and then changing the size of the gap between the cavity wall and the end of the plug-in portion, and finally changing the stiffness of the scraper plate, so that the gap size changes linearly, thereby being able to linearly change the stiffness of the scraper plate, so that the stiffness of the scraper plate can be adjusted in real time according to the pouring stage of the poured semi-flexible pavement and the specific slurry fluidity. When the size of the cavity gap increases, the flexibility of the plate body increases, which can reduce the resistance of the scraper plate and avoid sticking and hair pulling. When the size of the cavity gap decreases, the flexibility of the plate body decreases and the stiffness increases, which can suppress lateral escape of the slurry and hydraulic vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of an initial state of a pouring type semi-flexible pavement scraping device provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a plate body of a pouring type semi-flexible pavement scraper device in an initial state provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a first working state of a pouring type semi-flexible pavement scraping device provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a second working state of a pouring type semi-flexible pavement scraper device provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a plug-in connector according to an embodiment of the present invention; Figure 6 for Figure 3 Schematic diagram of the local structure at G in the middle.

[0018] Description of reference numerals: 1. Plate; 2. Cavity; 3. Moving part; 30. Bracket; 31. Motor; 32. Screw-nut assembly; 320. Nut; 321. Screw; 322. Fixing sleeve; 323. Telescopic rod; 33. Pulley; 34. Belt; 35. Mounting plate; 4. Connecting part; 40. Main body; 41. Receiving groove; 42. Spring; 43. Extension plate; 44. Insert plate; 45. End plate; 5. Gap; 6. Slide groove; 7. Slot. DETAILED DESCRIPTION

[0019] A specific embodiment of the present invention is described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] The present invention is described below by means of several specific embodiments. To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and components may be omitted. When any component of an embodiment of the present invention appears in more than one drawing, the component may be represented by the same reference numeral in each drawing.

[0022] Injection-type semi-flexible pavement is constructed by injecting a high-performance slurry into a flexible base of large-void asphalt mixture (void ratio 20%-30%). The slurry fills the voids in the base asphalt mixture, and after curing to develop rigidity, it forms a composite pavement material with the base asphalt mixture, jointly bearing vehicle loads. This composite pavement structure is achieved through the interlocking action of aggregates and the injection of a special slurry. It combines the aesthetics and comfort of an asphalt pavement with the stability of a rigid pavement, and is significantly effective in preventing severe rutting at low speeds, heavy loads, and high temperatures.

[0023] Slurry I has low fluidity, which ensures that the interior of the large-void asphalt mixture in the base can be fully poured (pouring rate ≥ 85%). Slurry II has high fluidity, which ensures that the surface slurry will not gather to the lower part under the action of gravity after being evenly scraped under conditions with large slopes. The combination of the two slurries ensures that both the interior of the large-void asphalt mixture in the base and the surface voids are fully filled with slurry, thereby solving the problem of incomplete surface pouring of poured semi-flexible pavements under conditions with large slopes in mountainous areas. Therefore, ensuring the smoothness of the scraping of slurries I and II is the key to ensuring the surface pouring quality of poured semi-flexible pavements under conditions with large slopes in mountainous areas. Based on this, the embodiments of the present invention provide the following solutions.

[0024] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic structural diagram of an initial state of a pouring type semi-flexible pavement scraper device provided by an embodiment of the present invention. Figure 2 A cross-sectional view of a plate body in the initial state of a pouring type semi-flexible pavement scraping device provided by an embodiment of the present invention, as shown in FIG. Figure 1 and Figure 2As shown, an embodiment of the present invention provides a perfused semi-flexible pavement scraping device, including a scraping plate connected to a mobile frame, the scraping plate including: a plate body 1, a moving part 3 and a plug-in part 4, the plate body 1 is made of a high-rigidity wear-resistant alloy material, and a wear-resistant coating is provided on the bottom thereof, the plate body 1 has a cavity 2 running through its top surface, the plate body 1 is made of a material with elastic deformation ability, the plate body 1 is fixedly connected to the mobile frame, the moving part 3 is connected to the mobile frame, and the moving part 3 is located above the plate body 1, the moving part 3 is connected to the mobile frame through an adjustable connecting mechanism, the connecting mechanism includes a locking nut and an adjusting screw, which can realize fine-tuning of height, the plug-in part 4 is connected to the moving part 3, and the number is the same as the cavity 2, the plug-in part 4 is connected to the mobile frame The moving part 3 is connected by a quick disassembly structure, and a sealing ring is provided at the bottom of the plug-in part 4. The plug-in part 4 is driven by the moving part 3 to move up and down in the vertical direction and is movably inserted into the cavity 2. The plug-in part 4 is driven by the moving part 3 to move up and down and is movably inserted into the cavity 2. The moving part 3 drives the plug-in part 4 to move to different positions of the cavity 2 to change the size of the gap 5 formed between the cavity wall of the cavity 2 and the end of the plug-in part 4. The moving part 3 can drive the plug-in part 4 to be completely inserted into the cavity 2 to fill the cavity 2. The moving part 3 adopts an electric push rod or a hydraulic cylinder as a driving element, which can drive the plug-in part 4 to move to different positions of the cavity 2, thereby changing the size of the gap 5 formed between the cavity wall of the cavity 2 and the end of the plug-in part 4.

[0025] Furthermore, the embodiment of the present invention provides a pouring type semi-flexible pavement scraping device, which also includes a control system, including a displacement sensor and a PLC controller, which can monitor and automatically adjust the position of the plug-in part 4 in real time. The displacement sensor can be installed on the mobile frame part to detect the moving position of the moving part 3 or the moving position of the plug-in part 4. A buffer spring can be set between the moving part 3 and the mobile frame to absorb vibrations during the construction process. The plug-in part 4 adopts a segmented design, and different specifications of the end can be replaced as needed to adapt to slurries of different viscosities. A guide groove can be set on the inner wall of the cavity 2 to ensure the stability of the plug-in part 4 during movement. The pouring type semi-flexible pavement scraping device provided by the embodiment of the present invention can also be equipped with a laser rangefinder to monitor the scraping thickness in real time to ensure the construction quality.

[0026] A scraper device for a poured semi-flexible pavement provided by an embodiment of the present invention selects a material for the plate body that can produce elastic deformation, and opens a cavity on the plate body, and the cavity passes through the top surface of the plate body, so that the interior of the plate body is changed from the original solid structure to a hollow structure, and a matching plug-in portion is provided for the cavity, and the plug-in portion is driven to move by the moving portion, thereby changing the depth of the plug-in portion inserted into the cavity, and then changing the size of the gap between the cavity wall and the end of the plug-in portion, and finally changing the stiffness of the scraper plate, so that the gap size changes linearly, thereby being able to linearly change the stiffness of the scraper plate, so that the stiffness of the scraper plate can be adjusted in real time according to the pouring stage of the poured semi-flexible pavement and the specific slurry fluidity. When the size of the cavity gap increases, the flexibility of the plate body increases, which can reduce the resistance of the scraper plate and avoid sticking and hair pulling. When the size of the cavity gap decreases, the flexibility of the plate body decreases and the stiffness increases, which can suppress lateral escape of the slurry and hydraulic vibration.

[0027] Reference again Figure 2 There are multiple cavities 2, and the multiple cavities 2 are arranged side by side along the transverse direction of the plate body 1 to form a multi-channel adjustment structure, allowing partition adjustment. For example, at different positions in the width direction of the road surface, the stiffness can be adjusted separately according to the difference in slurry fluidity (such as poor slurry fluidity at the edge) to ensure uniform overall leveling effect. The two opposite side walls of the cavity 2 are inclined from top to bottom so that the cavity 2 is in a closed shape from top to bottom. The cross-section of each cavity 2 is trapezoidal or V-shaped, and its two opposite side walls are inclined from top to bottom so that the cavity 2 is in a closed shape from top to bottom. The closed shape can enhance structural stability, and the inclined side walls can disperse the stress during scraping and reduce the risk of deformation of the plate body 1. The outer contour of the plug-in part 4 is matched with the inner contour of the cavity 2, and the outer contour of the plug-in part 4 is tightly fitted with the inner contour of the cavity 2 to ensure stiffness. The closed-shaped cavity 2 can further increase the linear change gradient, and since the force on the slurry hanging board is increasing from top to bottom, the cross-section of the cavity 2 becomes smaller from top to bottom. When the plug-in part 4 is not inserted into the cavity 2, it can ensure that the bearing capacity of each position of the plate body 1 is relatively appropriate to avoid deformation and damage of the plate body 1.

[0028] In response to different construction stages of cast-in-place semi-flexible pavements, an embodiment of the present invention provides a scraping device for cast-in-place semi-flexible pavements that can dynamically adjust stiffness: Stage 1 (high-viscosity slurry I): the slurry has low fluidity and high viscosity. At this time, the plug-in portion 4 is partially inserted, the gap 5 is larger, the stiffness of the plate body 1 is reduced, the flexibility is increased, and the bottom of the plate body 1 can adapt to the gap between the plate body 1 and the slurry, avoiding the local shear rate being too high and causing damage to the internal structure of the slurry. At the same time, the scraper plate with greater flexibility undergoes elastic deformation when subjected to the viscous force of the slurry, so that the contact pressure is evenly distributed, and sliding shear is formed between the slurry and the scraper plate, avoiding the occurrence of sticky and hairy phenomena. Stage 2 (low viscosity slurry II): The slurry has high fluidity. At this time, the plug-in part 4 is fully inserted, the rigidity of the plate body 1 increases, and the flexibility is relatively small. When the scraper blade is pushed forward, the gap between the scraper blade and the slurry is stable, which can reduce the flow measurement. In addition, the high-fluidity slurry has a high frequency of impacting the scraper blade, and the scraper blade with less flexibility and greater rigidity can avoid the frequency of the scraper blade being the same as the impact frequency of the slurry, avoid the generation of high-frequency hydraulic fluctuations, and thus avoid the "corrugated" scratches caused by the resonance of the scraper blade and the slurry. At this time, a pressure sensor or a slurry flow rate detector can be set at the bottom of the plate body 1 to monitor the scraping resistance in real time and automatically adjust the pressure through the PLC control system. The position of the plug-in part 4 is adjusted to achieve dynamic stiffness matching, and manual fine-tuning, preset program control (such as automatic switching of stiffness according to the construction stage) and remote wireless control are supported to adapt to complex working conditions. By replacing the cavity 2 module or the end of the plug-in part 4 with different inclination angles, different materials such as epoxy asphalt and cement-based slurry can be adapted. The cavity 2 and the plug-in part 4 use wear-resistant coatings or detachable bushings. After wear, only local parts need to be replaced to reduce maintenance costs. The embodiment of the present invention provides a cast-type semi-flexible pavement scraping device, which solves the problem that traditional scraping plates cannot adapt to changes in slurry fluidity through hollow structure design and dynamic stiffness adjustment.

[0029] refer to Figure 5 , Figure 5 A schematic diagram of the structure of the plug-in portion provided in an embodiment of the present invention is shown in FIG. Figure 5As shown, the plug-in portion 4 includes a main body 40, a spring 42 and an extension plate 43. Both sides of the inclined main body 40 are provided with a receiving groove 41. The receiving groove 41 extends along the plug-in direction and is used to receive the spring 42 and the extension plate 43. One end of the spring 42 is fixed to the bottom of the receiving groove 41, and the other end of the spring 42 is connected to one side of the extension plate 43. The spring 42 is made of high fatigue-resistant stainless steel or corrosion-resistant alloy spring, one end of which is fixed to the bottom of the receiving groove 41 and the other end is connected to the extension plate 43 to provide continuous elastic support force. The other side of 43 abuts the inclined side wall of the cavity 2. The extension plate 43 is made of wear-resistant material (such as polyurethane, high-rigidity engineering plastics or chrome-plated metal). One side of it is connected to the spring 42, and the other side always abuts the inclined side wall of the cavity 2 under the action of the spring to form a dynamic seal. The plug-in part 4 is further optimized into an elastic adaptive structure. Through the cooperation of the spring 42 and the extension plate 43, dynamic fitting with the side wall of the cavity 2 is achieved, ensuring the stiffness control stability of the main body 40 during the scraping process, and improving the durability and adaptability of the device.

[0030] Extension plate 43 floats slightly under the elastic force of spring 42, automatically compensating for manufacturing tolerances or wear on the sidewalls of cavity 2, maintaining a tight fit and preventing slurry leakage. It also linearly changes the stiffness of main body 40. During construction, the scraper blade may be subjected to vibrations from uneven road surfaces or slurry impact. Spring 42 absorbs high-frequency vibrations, preventing hard collisions between connector 4 and cavity 2, thereby extending its service life. Extension plate 43 can be modularized and secured with quick-release clips or bolts. If worn, it can be replaced individually without replacing connector 4 entirely. The preload of spring 42 is adjustable. A threaded adjustment rod at the bottom of receiving slot 41 adjusts the initial compression of spring 42 to accommodate different slurry characteristics.

[0031] refer to Figure 6 , Figure 6 for Figure 3 The local structure diagram at G in the figure is as follows: Figure 6 As shown, a slide groove 6 is provided on the inclined side wall of the cavity 2 to cooperate with the extension plate 43. The slide groove 6 plays a guiding role and can also enhance the stability and rigidity of the connection between the extension plate 43 and the main body 40. In this way, the extension plate 43 can be stably supported inside the cavity 2 of the main body 40, and the rigidity of the main body 40 can be linearly changed while ensuring a stable linear rigidity change.

[0032] Reference again Figure 6The bottom of the cavity 2 has a slot 7, and the bottom of the plug-in part 4 is connected to a plug-in plate 44 that cooperates with the slot 7. The present invention further optimizes the bottom connection method between the cavity 2 and the plug-in part 4, by arranging a slot 7 at the bottom of the cavity 2 and adding a matching plug-in plate 44 at the bottom of the plug-in part 4, forming a dual positioning and reinforcement structure, so that when the plug-in part 4 is fully inserted into the cavity 2, the bottom connection is formed by the plug-in plate 44 and the slot 7, and the side connection is formed by the extension plate 43 and the slide groove 6, which significantly improves the stability and adjustment accuracy of the scraper plate.

[0033] Slot 7 is located in the center of the bottom of cavity 2 and extends longitudinally along the plate body 1. The cross section is T-shaped, dovetail-shaped or rectangular, providing a stable guiding function. The depth of slot 7 can be 5mm-15mm. Wear-resistant bushings (such as high manganese steel or ceramic coating) are provided on both sides to reduce wear caused by long-term use. Buffer pads (such as polyurethane elastomer) can be provided at the end of slot 7 to avoid impact noise when the insert plate 44 moves to the extreme position. The inner surface of slot 7 is processed by laser cladding technology, and the rigidity reaches HRC60 or more, and the wear-resistant life is increased by 3 times. The insert plate 44 and the plug are The bottom of the part 4 is rigidly connected, and adopts a profile that completely matches the slot 7 to ensure gapless sliding. A self-lubricating coating (such as graphene or PTFE) is provided on the surface to reduce the friction coefficient and make the movement of the plug-in part 4 smoother. A magnetic sensor or a photoelectric encoder can be installed at the end of the plug-in plate 44 to detect the precise position of the plug-in part 4 in real time. The plug-in plate 44 is connected to the plug-in part 4 by bolts or spring pins, which is convenient for quick disassembly and replacement. The plug-in plate 44 is made of titanium alloy composite material, which is 30% more rigid and 40% lighter than traditional steel, reducing the driving energy consumption of the moving part 3.

[0034] refer to Figure 2 and 3 ,in, Figure 33. The present invention provides a structural schematic diagram of a first working state of a cast-type semi-flexible pavement scraper device, wherein the moving part 3 comprises: a bracket 30, a motor 31 and a screw-nut assembly 32. The bracket 30 is fixedly connected to the moving frame of the scraper device, the motor 31 is fixed to the bracket 30, one end of the screw 321 of the screw-nut assembly 32 is connected to the motor 31, and the other end of the screw 321 of the screw-nut assembly 32 is rotatably connected to the bracket 30, and the nut 320 of the screw-nut assembly 32 is connected to the main body 40. A high-precision linear drive combination of motor drive + screw-nut transmission is adopted. Through the coordinated cooperation of the bracket 30, the motor 31 and the screw-nut assembly 32, accurate and stable control of the position of the plug-in part 4 is achieved. The bracket 30 adopts a high-rigidity aluminum alloy or welded steel structure, and is connected to the moving frame of the scraper device through an adjustable bolt group, allowing fine adjustment of the installation position (within the range of ±10mm). The motor 31 is a servo motor or a stepper motor with a rated power of 0.5-2.2kW and is equipped with a system The actuator and absolute encoder are fixed to the mounting platform of bracket 30 via a flange. Shock-absorbing gaskets are used to reduce vibration transmission. The protection level is IP65, suitable for outdoor humid and dusty environments. The precision ball screw pair of the screw-nut assembly 32 has an accuracy level of C5 or above and a lead of 5mm-10mm. The nut 320 adopts a flange structure and is connected to the main body 40 by high-rigidity bolts. One end of the screw 321 is connected to the bracket 30 via an angular contact bearing, and the other end is provided with a preload adjustment mechanism. The dual guide system has a main guide providing axial driving force through the screw-nut assembly, and the secondary guide withstands radial force through the linear guide inside the bracket 30, eliminating transmission clearance and ensuring smooth and shake-free movement of the plug-in part 4. A disc spring preload device is provided at the end of the screw 321. The clearance caused by screw wear can be compensated by adjusting the nut. The preload force sensor monitors in real time and provides feedback to the control system. The motor 31 has a built-in torque limiter, which automatically powers off when the plug-in part 4 encounters abnormal resistance. A mechanical safety clutch serves as secondary protection.

[0035] Considering that the fluidity of the slurry may be different at different construction locations and at different stages.

[0036] In a pouring type semi-flexible road scraping device provided in an embodiment of the present invention, reference is made to Figure 2 、 Figure 3 and Figure 4 ,in, Figure 4 This is a structural schematic diagram of the second working state of a cast-type semi-flexible pavement scraper device provided in an embodiment of the present invention. The initial position of the nut 320 of the screw-nut assembly 32 is different. The nut 320 is fixed with a fixing sleeve 322, and the fixing sleeve 322 is sleeved on the screw 321. The bottom of the fixing sleeve 322 is fixedly connected to the main body 40.

[0037] Figure 2The state in which the plug-in portion 4 is not inserted into the cavity 2 corresponds to the construction mode of the slurry with the lowest fluidity. At this time, all cavities 2 are not filled. At this time, the plate body 1 has the greatest flexibility and is adapted to the slurry with the lowest fluidity. This can avoid the local shear rate being too high and causing the internal structure of the slurry to be damaged. At the same time, the more flexible scraper plate undergoes elastic deformation when subjected to the viscous force of the slurry, making the contact pressure evenly distributed and forming a slip shear between the slurry and the scraper plate, thus avoiding the phenomenon of sticky hair pulling. Figure 3 For the case where some of the plug-in parts 4 are fully inserted into the cavity 2 and the remaining plug-in parts 4 are partially inserted, refer to Figure 3 , the insertion position of the plug-in part 4 is different, so the size of the gap 5 of each cavity 2 can be regulated by uniformly controlling the insertion position of the plug-in part 4, so that it can adapt to slurries with different fluidity. This state corresponds to the slurry with medium fluidity and can be adjusted linearly. Figure 4 What is shown is the state where the plug-in part 4 is fully inserted into the cavity 2. This state corresponds to the construction mode of the slurry with the greatest fluidity. At this time, all the cavities 2 are completely filled with the plug-in part 4. In this state, the motor 31 can be controlled to rotate all the time. When the plug-in part 4 at the initial position at the lowest end is fully inserted, the nut 320 where the plug-in part 4 is located reaches the lowest end position of the screw 321 as the motor 31 rotates. The screw 321 continues but the plug-in part 4 does not move. The remaining plug-in parts 4 continue to move downward until the nuts 320 where all the plug-in parts 4 are located reach the lowest end position of the screw 321. Then all the plug-in parts 4 are completely inserted into the cavity 2. At this time, the strength and rigidity of the plate body 1 are the greatest, which can adapt to the slurry with the greatest fluidity and avoid "corrugated" scratches caused by the resonance of the scraper plate with it.

[0038] Specifically, all the plug-in parts 4 are divided into multiple groups, each group contains no less than three plug-in parts 4, and the initial positions of the plug-in parts 4 at corresponding positions in each group are consistent. Figure 3 All the plug-in parts 4 can be divided into multiple groups, and the initial positions of the plug-in parts 4 corresponding to each group are consistent. This can ensure the uniformity of the change of the internal gap of the board body 1 and enhance the overall structural stability of the board body 1.

[0039] Reference again Figure 4The moving part 3 also includes a pulley 33 and a belt 34 connected to it for transmission. Each screw 321 is fixedly connected to a pulley 33. The pulley 33 is usually made of metal or engineering plastic and has a specific diameter and width to adapt to different load and speed requirements. Multiple pulleys 33 are connected by belts 34. The belt 34 is a transmission element used to connect the pulley 33 and the output shaft of the motor 31. It can be a flat belt, a V-belt or other types of belts. The belt 34 is responsible for transmitting the rotational motion of the motor 31 to the pulley 33, thereby driving the entire mechanical system. The output shaft of the motor 31 is connected to the pulley 33. The screw 321 is a mechanical component that supports the pulley 33 and enables it to move along a predetermined path. The screw 321 may be made of metal and have sufficient strength and rigidity to support the load of the pulley 33 and the belt 34. The motor 31 is a component that provides power. Its output shaft is connected to the pulley 33 directly or through a reducer, a coupling, etc. The motor 31 can be a DC motor, an AC motor or other types of motors. The appropriate motor type is selected according to application requirements.

[0040] The output shaft of the motor 31 is fixedly connected to a pulley 33, which is located at the center position of the bracket 30, and the remaining pulleys 33 connected to all the screws 321 are symmetrically installed on both sides of the center position, so that the overall structure is relatively symmetrical, and the remaining pulleys 33 are installed on the bracket 30 through a fixed shaft, and the mounting plate 35 can be further connected to the bracket 30, with a gap between the two. The upper end of the fixed shaft is rotatably connected to the bracket 30, and the lower end is rotatably connected to the mounting plate 35, and the screws 321 are fixedly connected to each fixed shaft one by one, and the pulleys 33 are fixed on each fixed shaft. All the pulleys 33 are transmitted by belts 34, so that the motor 31 can drive all the pulleys 33 to rotate synchronously and then drive all the screws 321 to rotate synchronously, finally making all the plug-in parts 4 move synchronously, maintaining consistent movement, and avoiding the unstable center of gravity caused by asynchronous movement.

[0041] contrast Figure 3 and Figure 4 The two adjacent nuts 320 are connected by a telescopic rod 323, and the two ends of the telescopic rod 323 are rotatably connected to the nuts 320. The telescopic rod 323 adopts a double-layer sleeve design, and the inner rod and the outer tube are matched through linear bearings, allowing a slight position difference between adjacent nuts 320. The surface is hard chrome plated, the stiffness is above HRC60, and the friction coefficient is less than 0.05. The rod end of the universal connection mechanism is equipped with a self-lubricating spherical bearing with a maximum swing angle of ±8° to compensate for the installation parallelism error of the screw 321. It has a built-in torque limiter and slip protection during overload. The telescopic rod 323 has a built-in nitrogen spring to balance the force difference between adjacent nuts 320 in real time and reduce the load fluctuation of the motor 31.

[0042] On the one hand, the telescopic rod 323 realizes the synchronous and coordinated movement of multiple plug-in parts 4. The multiple plug-in parts 4 are connected by the telescopic rod 323, ensuring the overall rigidity of the plug-in parts 4 after being inserted into the plate body 1. On the other hand, the telescopic rod 323 plays a limiting role to prevent the nut 320 from rotating.

[0043] Specifically, the plug-in portion 4 also includes an end plate 45, which can abut the top surface of the plate body 1. The end plate 45 is integrally formed by high-rigidity aluminum alloy (6061-T6) or stainless steel (304). The surface of the end plate 45 is sprayed with a 0.2 mm thick PTFE coating with a thickness of 10-15 mm. The diameter is 20-30 mm larger than the opening of the cavity 2 to form an effective limit surface. An annular sealing groove is provided on the bottom surface, and a fluororubber sealing ring (temperature resistant -30°C to 150°C) is embedded therein. It is connected to the top of the main body 40 through a high-rigidity hexagon socket bolt (M8×4 uniformly distributed). A quick-release buckle structure is optionally provided to facilitate rapid maintenance and replacement. The contact surface is finely ground and the flatness is ≤0.02 mm.

[0044] The above inventions are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A pouring type semi-flexible pavement scraping device, characterized in that: The invention comprises a scraper blade connected to a mobile frame, wherein the scraper blade comprises: A plate body (1) having a cavity (2) extending through its top surface, the plate body (1) being made of a material having elastic deformation capability, and the plate body (1) being fixedly connected to the movable frame; A moving part (3) is connected to the moving frame, and the moving part (3) is located above the plate body (1); The plug-in portion (4) is connected to the movable portion (3) and has the same number as the cavities (2). The plug-in portion (4) is driven by the movable portion (3) to move up and down and is movably plugged into the cavity (2). The movable portion (3) drives the plug-in portion (4) to move to different positions of the cavity (2) to change the size of the gap (5) formed between the cavity wall of the cavity (2) and the end of the plug-in portion (4). The movable portion (3) can drive the plug-in portion (4) to be completely inserted into the cavity (2) to fill the cavity (2).

2. The pouring type semi-flexible road scraper device according to claim 1, characterized in that: There are a plurality of cavities (2), and the plurality of cavities (2) are arranged side by side in the transverse direction of the plate body (1). Two opposite side walls of the cavity (2) are tilted from top to bottom so that the cavity (2) is in a closed shape from top to bottom, and the outer contour of the plug-in portion (4) matches the inner contour of the cavity (2).

3. The pouring type semi-flexible road scraper device according to claim 2, characterized in that: The plug-in portion (4) comprises a main body (40), a spring (42) and an extension plate (43). Both sides of the inclined main body (40) are provided with a receiving groove (41). One end of the spring (42) is fixed to the bottom of the receiving groove (41). The other end of the spring (42) is connected to one side of the extension plate (43). The other side of the extension plate (43) abuts against the inclined side wall of the cavity (2).

4. The pouring type semi-flexible road scraper device according to claim 3, characterized in that: A sliding groove (6) cooperating with the extension plate (43) is provided on the inclined side wall of the cavity (2).

5. The pouring type semi-flexible road scraper device according to claim 1, characterized in that: The bottom of the cavity (2) is provided with a slot (7), and the bottom of the plug-in portion (4) is connected to a plug-in board (44) that matches the slot (7).

6. The pouring type semi-flexible road scraper device according to claim 2, characterized in that: The moving part (3) comprises: A bracket (30) is fixedly connected to the movable frame; A motor (31) is fixed to the bracket (30); A lead screw and nut assembly (32) has one end of a lead screw (321) connected to the motor (31), the other end of the lead screw (321) is rotatably connected to the bracket (30), and the nut (320) of the lead screw and nut assembly (32) is connected to the plug-in portion (4).

7. The pouring type semi-flexible road scraper device according to claim 6, characterized in that: The nut (320) of the screw-nut assembly (32) has a different initial position. The nut (320) is fixed with a fixing sleeve (322), the fixing sleeve (322) is sleeved on the screw (321), and the bottom of the fixing sleeve (322) is fixedly connected to the main body (40).

8. The pouring type semi-flexible road scraper device according to claim 6, characterized in that: All the plug-in parts (4) are divided into multiple groups, each group contains no less than three plug-in parts (4), and the initial positions of the plug-in parts (4) at corresponding positions in each group are consistent.

9. The pouring type semi-flexible road scraper device according to claim 6, characterized in that: The moving part (3) further includes a pulley (33) and a belt (34) connected thereto for transmission. Each of the lead screws (321) is fixedly connected to a pulley (33). The plurality of pulleys (33) are connected for transmission via the belt (34). The output shaft of the motor (31) is connected to the pulley (33).

10. The pouring type semi-flexible road scraper device according to claim 6, characterized in that: Two adjacent nuts (320) are connected via a telescopic rod (323), and both ends of the telescopic rod (323) are rotatably connected to the nuts (320).

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