A highway pavement crack rapid repairing device and construction method

Abstract

The application provides a highway pavement crack quick repairing device and a construction method. The repairing device comprises a carrier vehicle, a fixing frame is fixedly installed on the carrier vehicle, an inner wall of the fixing frame is fixedly connected with a stirring box, a flattening mechanism is arranged at the bottom of the carrier vehicle, two telescopic rods are arranged at the bottom of the carrier vehicle and located at the left side of the flattening mechanism, and excess material separating mechanisms are arranged at the movable ends of the two telescopic rods. The highway pavement crack quick repairing device and the construction method realize full-process continuous operation from material stirring to pavement repairing and excess material cleaning through the design of the carrier vehicle integrating four core functions of stirring, filling, flattening and waste material separation, and the flexible movement of the universal wheel and the stable fixing of the brake mechanism, so that the repairing period of a single crack is greatly shortened without frequent equipment replacement or work station adjustment.

Description

Technical Field

[0001] This invention relates to the field of highway maintenance engineering technology, specifically to a rapid repair device and construction method for highway pavement cracks. Background Technology

[0002] Under the combined effects of long-term traffic loads, environmental factors (such as temperature changes and rain and snow erosion), and material aging, highway pavements are highly susceptible to cracks of varying widths and depths. If these cracks are not repaired in a timely manner, rainwater and debris will seep into them, eroding the roadbed structure and causing the cracks to further expand into alligator cracking, subsidence, and even pavement damage and collapse. This seriously affects highway traffic safety and service life, while also significantly increasing subsequent maintenance costs.

[0003] Currently, existing road crack repair technologies suffer from the following shortcomings: First, the processes are fragmented and cumbersome, requiring separate operations such as material mixing, manual filling, manual compaction, and residual material removal. This not only necessitates multi-person collaboration but also involves lengthy equipment handling and workstation adjustments between processes, resulting in low operational efficiency and difficulty in meeting the needs of emergency highway repairs and centralized treatment of multiple cracks. Second, equipment adaptability is poor. Traditional repair tools are mostly of fixed specifications and cannot flexibly adapt to cracks of different widths and depths. For wider cracks, incomplete filling is likely, while for narrower cracks, material waste or inadequate tool penetration can occur. Third, repair quality is unstable. Manual material mixing can easily lead to uneven mixing, resulting in insufficient bonding strength and easy road surface detachment after repair. Manual compaction cannot guarantee flatness, and incomplete removal of residual material can cause road surface bumps or debris residue, affecting driving comfort. Fourth, the operation is demanding and labor-intensive. Each step relies on manual experience for control, making operational errors prone to occur. Furthermore, prolonged outdoor work and equipment handling increase the workload of workers. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rapid repair device and construction method for road surface cracks, so as to solve the problems of scattered procedures, poor equipment versatility, insufficient flatness of the repair surface, and incomplete cleaning of residual materials in the road surface crack repair process of the prior art.

[0005] This invention provides a rapid repair device for road surface cracks. The repair device includes: a pallet truck, on which a fixed frame is fixedly installed. A mixing tank is fixedly connected to the inner wall of the fixed frame. Repair material in the mixing tank is delivered to the ground crack through a feeding pipe at the bottom of the mixing tank. Along the forward direction of the repair device, a leveling mechanism is provided at the rear side of the discharge port of the feeding pipe at the bottom of the pallet truck. A telescopic rod is provided at the rear side of the leveling mechanism. The movable end of the telescopic rod is provided with a residual material separation mechanism for cleaning up excess repair material on the ground surface. The flattening mechanism includes a concave connecting frame and a roller frame. The concave connecting frame is fixedly installed at the bottom of the carrier. The top of the roller frame is detachably fixedly connected to the groove of the concave connecting frame by bolts and nuts. The front side wall of the roller frame has a slot. Two limiting plates are fixedly installed at both ends of the bottom of the roller frame. A flattening roller is rotatably connected between the two limiting plates by a bearing. The axis of the flattening roller is perpendicular to the traveling direction of the carrier. A scraper is fixedly installed inside the slot, and one end of the scraper is in contact with the outer peripheral wall of the flattening roller.

[0006] Furthermore, the waste material separation mechanism includes an adjustment box fixedly installed at the bottom of the carrier vehicle. Inside the adjustment box, a bidirectional threaded rod is rotatably connected via bearings. An adjustment motor is fixedly installed on the outside of the adjustment box. The output shaft of the adjustment motor is coaxially fixedly connected to one end of the bidirectional threaded rod. Two symmetrically arranged movable sleeve blocks are threadedly connected to the bidirectional threaded rod. Two guide limit blocks connected to the inner wall of the adjustment box are fixedly installed on the outer wall of each movable sleeve block. A T-shaped connecting frame extending to the outer bottom of the adjustment box is fixedly connected to the bottom of each movable sleeve block. A waste material separation module is provided at one end of each T-shaped connecting frame extending to the outer bottom of the adjustment box.

[0007] Furthermore, the waste separation module includes an upper cover plate, a side guide shovel plate, and a lifting shovel plate. The top of the upper cover plate is fixedly connected to the bottom of the T-shaped connecting frame. The side guide shovel plate is fixedly installed below the upper cover plate, and the lifting shovel plate is fixedly installed at the bottom of the side guide shovel plate. The angle between the front end face of the side guide shovel plate and the lifting shovel plate is 120-150°, forming an outwardly inclined guide channel to facilitate the diversion of waste to both sides.

[0008] Furthermore, the threads at both ends of the bidirectional threaded rod have opposite directions of rotation, and the internal threads of the two movable sleeves are adapted to the threads at both ends of the bidirectional threaded rod; the adjusting motor is a stepper motor; the inner wall of the adjusting box has two guide grooves adapted to the guide limiting blocks, and the guide limiting blocks slide in cooperation with the guide grooves.

[0009] Furthermore, the mixing tank is equipped with a mixing module, which includes a transmission rod, a mixing motor, and a mixing frame. The transmission rod is rotatably connected to the inner top wall of the mixing tank via a bearing. The mixing motor is fixedly installed on the top of the mixing tank. The top end of the transmission rod is coaxially fixedly connected to the output shaft of the mixing motor. The mixing frame is mounted on the transmission rod and is arranged in a spiral pattern.

[0010] Furthermore, a feed inlet is provided at the top of the mixing tank and on one side of the mixing motor, and a sealing cover is hinged to the top of the feed inlet; a discharge outlet is provided at the bottom of the mixing tank, and a feeding pipe is fixedly connected to the discharge outlet via a flange, with the end of the feeding pipe extending to the bottom of the carrier vehicle.

[0011] Furthermore, an electrically controlled valve is provided on the feeding pipe, and a repair nozzle is fixedly connected to the end of the feeding pipe.

[0012] Furthermore, the bottom of the pallet truck is evenly provided with four omnidirectional wheels, each of which is equipped with a brake mechanism. Along the forward direction, a pusher frame is fixedly connected to the rear side wall of the pallet truck, and a control panel is provided on the rear side wall of the pallet truck.

[0013] Furthermore, the scraper is made of elastic wear-resistant rubber material; the contact pressure between the scraper and the flattening roller is 0.3-0.8MPa, and the outer peripheral wall of the flattening roller is wrapped with a polyurethane wear-resistant layer.

[0014] This invention provides a construction method for a rapid repair device for highway pavement cracks. The method utilizes the aforementioned repair device, and the specific construction steps include:

[0015] S1: Preliminary preparation: Add road repair material into the mixing tank through the feed inlet, close the sealing cover, start the mixing motor to drive the transmission rod and mixing frame to rotate, and mix and crush the repair material. The mixing time is 3-8 minutes to ensure that the repair material is mixed evenly.

[0016] S2: Positioning adjustment: Push the platen vehicle to the location of the road crack, start the adjustment motor to drive the bidirectional threaded rod to rotate, and drive the two movable sleeve blocks to move relative to or towards each other along the guide slide. Adjust the distance between the two waste separation modules according to the crack width to make it match the crack width.

[0017] S3: Crack Repair: Open the electric control valve through the control panel. The repair material, which is mixed evenly in the mixing tank, is sprayed into the crack through the feed pipe from the repair nozzle, ensuring that the repair material fills the crack and is slightly higher than the road surface.

[0018] S4: Smoothing treatment: After the crack repair is completed, push the platen truck to continue moving so that the smoothing mechanism can compact the filled crack area.

[0019] S5: Waste leveling: While compacting and leveling, the telescopic rod is extended through the control panel, which drives the waste material separation mechanism to descend, so that the lifting shovel plate fits the road surface and lifts up the excess repair material in the cracks and surrounding areas, separating it from the ground.

[0020] S6: Final inspection: After the flattening and waste separation are completed, push the pallet truck away from the work area and turn off all working parts through the control panel; at the same time, the staff clean up the excess repair material and check the flatness of the repaired road surface. If there are local uneven areas, repeat steps S3-S5 for secondary processing to ensure that the repaired road surface is flush with the original road surface and has no bumps or depressions.

[0021] As can be seen from the above embodiments, the rapid repair device and construction method for highway pavement cracks provided by the present invention have at least the following advantages:

[0022] 1. This rapid road surface crack repair device integrates four core functions—mixing, filling, leveling, and waste separation—into a single platform truck design. Combined with the flexible movement of omnidirectional wheels and the stable fixation of the braking mechanism, it achieves continuous operation throughout the entire process from material mixing to road surface repair and waste material cleaning. This eliminates the need for frequent equipment changes or workstation adjustments, significantly shortening the repair cycle for a single crack.

[0023] 2. This rapid road surface crack repair device, through the cooperation of a bidirectional threaded rod of the waste material separation mechanism and a stepper motor, can accurately adapt to cracks of different widths; with the help of a spirally distributed mixing rack and an adjustable speed mixing motor, it ensures that the repair material is mixed evenly; using a wear-resistant roller and an elastic scraper, it ensures the flatness of the repair surface; through the serrated structure and guiding diversion design of the material lifting shovel, it efficiently removes excess waste material. The synergistic effect of multiple components not only improves the repair quality, ensuring that the repaired road surface is flush with the original road surface, firm and durable, but also reduces labor costs and material waste.

[0024] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the invention. Attached Figure Description

[0025] The accompanying drawings, which are part of the specification of this invention, illustrate exemplary embodiments of the invention. The drawings, together with the description in the specification, serve to illustrate the principles of the invention.

[0026] Figure 1 The present invention provides an overall structural diagram of a rapid repair device for road surface cracks.

[0027] Figure 2 This is a cross-sectional view of a rapid repair device for road surface cracks provided by the present invention.

[0028] Figure 3 A cross-sectional view of the residue separation mechanism of a rapid repair device for road surface cracks provided by the present invention.

[0029] Figure 4 An exploded view of the waste separation module of a rapid repair device for road surface cracks provided by the present invention.

[0030] Figure 5 The present invention provides a structural diagram of a waste separation module of a rapid repair device for road surface cracks.

[0031] Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Cargo trolley, 2-Fixed frame, 3-Mixing box, 4-Panning mechanism, 5-Telescopic rod, 6-Residual material separation mechanism, 7-Mixing module, 8-Inlet, 9-Outlet, 10-Feeding pipe, 11-Electrically controlled valve, 12-Repair nozzle, 13-Wheel casters, 14-Pushing frame, 15-Control panel;

[0034] 401-Concave connecting frame, 402-Roller frame, 403-Groogging, 404-Scraper plate, 405-Limiting plate, 406-Flattening roller;

[0035] 601-Adjusting box, 602-Bidirectional threaded rod, 603-Adjusting motor, 604-Modible sleeve block, 605-Guide limit plate, 606-T-shaped connecting frame, 607-Waste separation module;

[0036] 701-Drive rod, 702-Stirring motor, 703-Stirring frame;

[0037] 6071-Top cover plate, 6072-Side guide shovel plate, 6073-Lifting shovel plate. Detailed Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0039] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be obvious to those skilled in the art. This application specification and embodiments are merely exemplary.

[0040] This invention provides a rapid repair device for road surface cracks, such as... Figure 1 and 2 The diagram shows the structure of the repair device. In a specific embodiment, the repair device includes: a carrier trolley 1, a fixing frame 2 fixedly installed on the carrier trolley 1, a mixing tank 3 fixedly connected to the inner wall of the fixing frame 2, and the bottom of the mixing tank 3 being fed into the ground crack through a feeding pipe 10.

[0041] Along the forward direction of the repair device, a flattening mechanism 4 is provided behind the discharge port of the bottom feeding pipe 10 of the pallet truck 1. A telescopic rod 5 is provided behind the flattening mechanism 4, and a material separation mechanism 6 for cleaning excess repair material from the ground surface is provided at the movable end of the telescopic rod 5. In this embodiment, two telescopic rods 5 are arranged laterally, and the lower telescopic end of the telescopic rod 5 is fixedly connected to the material separation mechanism 6, which is used to drive the material separation mechanism 6 to move up and down, to fit as close to the road surface as possible, to remove excess repair material from the road surface, and to keep the road surface flat.

[0042] Furthermore, such as Figure 6 As shown, the leveling mechanism 4 includes a concave connecting frame 401 and a roller frame 402. The concave connecting frame 401 is fixedly installed at the bottom of the carrier 1, and the top of the roller frame 402 is detachably fixedly connected to the groove at the bottom of the concave connecting frame 401 by bolts and nuts. A slot 403 is provided on the front side wall of the roller frame 402, and two limiting plates 405 are fixedly installed at both ends of the bottom of the roller frame 402. A leveling roller 406 is rotatably connected between the two limiting plates 405 through a bearing, and the axis of the leveling roller 406 is perpendicular to the traveling direction of the carrier 1. A scraper 404 is fixedly installed inside the slot 403, and one end of the scraper 404 is in contact with the outer peripheral wall of the leveling roller 406, used to scrape off debris or repair material from the surface of the leveling roller 406 when the leveling roller 406 is rolling. The scraped debris and repair materials will be discharged from the groove 403 along the scraper 404 and fall onto the road surface.

[0043] In this embodiment, the scraper 404 is made of elastic and wear-resistant rubber.

[0044] The bonding pressure between the scraper 404 and the flattening roller 406 is 0.3-0.8MPa. The outer peripheral wall of the flattening roller 406 is covered with a polyurethane wear-resistant layer, and the thickness of the wear-resistant layer is 5-10mm.

[0045] The roller frame 402 and the concave connecting frame 401 are detachably connected via bolts and nuts. This facilitates subsequent maintenance and replacement of the leveling roller 406 and scraper 404, and allows for the replacement of leveling rollers of different diameters or hardnesses according to the required smoothness of the repaired road surface. A deep groove ball bearing, fitted between the limiting plates 405 and the rotating shaft, reduces the rotational resistance of the leveling roller 406, ensuring a smooth and uninterrupted compaction process and improving the smoothness of the repaired road surface. The L-shaped scraper 404, designed to fit tightly against the leveling roller 406, effectively removes repair material adhering to the outer wall of the leveling roller in real time, preventing the adhering material from affecting subsequent compaction, avoiding material waste, and ensuring the continuity of the repair operation.

[0046] Furthermore, such as Figure 3 As shown, the waste material separation mechanism 6 includes an adjustment box 601 fixedly installed at the bottom of the carrier trolley 1. A bidirectional threaded rod 602 is rotatably connected inside the adjustment box 601 via bearings. The two ends of the bidirectional threaded rod 602 have opposite thread directions and the same thread pitch.

[0047] In addition, an adjustment motor 603 is fixedly installed on the outside of the adjustment box 601. The output shaft of the adjustment motor 603 is coaxially fixedly connected to one end of the bidirectional threaded rod 602, driving the bidirectional threaded rod 602 to rotate. Two symmetrically arranged movable sleeves 604 are threadedly connected to the bidirectional threaded rod 602, and one movable sleeve 604 is connected to the thread at each end. The internal threads of the two movable sleeves 604 are adapted to the threads at both ends of the bidirectional threaded rod 602. Two guide limiting blocks 605 connected to the inner wall of the adjustment box 601 are fixedly installed on the outer wall of each movable sleeve 604. Two guide grooves adapted to the guide limiting blocks 605 are opened on the inner wall of the adjustment box 601, and the guide limiting blocks 605 slide in cooperation with the guide grooves.

[0048] Each movable sleeve 604 is fixedly connected to a T-shaped connecting frame 606 extending to the outer side of the bottom of the adjusting box 601. A waste separation module 607 is provided at one end of each T-shaped connecting frame 606 extending to the outer side of the bottom of the adjusting box 601, and two waste separation modules 607 are arranged opposite each other. In this embodiment, the adjusting motor 603 is a stepper motor with a speed range of 50-300 r / min.

[0049] Furthermore, such as Figure 4 and Figure 5As shown, the waste separation module 607 includes an upper cover plate 6071, a side guide shovel plate 6072, and a lifting shovel plate 6073. The top of the upper cover plate 6071 is fixedly connected to the bottom of the T-shaped connecting frame 606. The side guide shovel plate 6072 is fixedly installed below the upper cover plate 6071, and the lifting shovel plate 6073 is fixedly installed at the bottom of the side guide shovel plate 6072. The angle between the front end face of the side guide shovel plate 6072 and the lifting shovel plate 6073 is 120-150°, forming an outwardly inclined guide channel to facilitate waste diversion to both sides. In this embodiment, the upper cover plate 6071 and the side guide shovel plate 6072 are vertically arranged, as are the side guide shovel plate 6072 and the lifting shovel plate 6073. The side guide shovel plate 6072 is vertically arranged on the bottom surface of the outer side of the upper cover plate 6071, and the top surface of the outer side of the lifting shovel plate 6073 is fixedly connected to the bottom surface of the side guide shovel plate 6072. The inner side of the front end of the side guide shovel 6072 is a slope, the thickness of which gradually decreases along the forward direction of the repair device, and the angle between the slope and the lifting shovel 6073 is 120-150°.

[0050] In this preferred embodiment, the front end of the lifting shovel 6073 is provided with a wear-resistant serrated inclined structure, and the foremost end of the lifting shovel 6073 is the front end of the inclined surface of the wear-resistant serrated inclined structure. Furthermore, the tooth height of the wear-resistant serrated structure is 3-8 mm, and the tooth spacing is 5-10 mm. The lifting shovel 6073 is made of tungsten carbide alloy, and the inner wall of the side guide shovel 6072 is coated with a polytetrafluoroethylene wear-resistant coating.

[0051] The mechanism utilizes the interlocking bidirectional threaded rod 602 within the adjusting box 601 and the adjusting motor 603, combined with the sliding limiting action of the guide limit block 605 and the guide groove 608. This allows the two movable sleeves 604 to move synchronously relative to each other or towards each other, thereby precisely adjusting the spacing between the two waste separation modules 607 to accommodate road surface cracks of varying widths (e.g., 1-50mm), solving the problems of fixed spacing and poor versatility in traditional waste separation mechanisms. The detachable connection between the T-shaped connecting frame 606 and the waste separation module 607 facilitates the replacement of different lifting shovels with varying structures based on the type of waste (e.g., solidified residue, excess repair material), improving the mechanism's adaptability. The wear-resistant serrated structure at the bottom of the lifting shovel 6073 enhances its ability to crush and lift waste adhering to the road surface. The combination of tungsten carbide material and a polytetrafluoroethylene coating significantly improves the shovel's wear resistance and anti-adhesion properties, extending its service life. The 120-150° inclined guide channel formed by the side guide shovel plate 6072 and the material lifting shovel plate 6073 can smoothly divert the shoveled waste to both sides, avoiding the accumulation of waste on the cracks and affecting the repair effect. At the same time, it reduces secondary damage to the repaired area and ensures the smoothness and aesthetics of the road surface after repair.

[0052] In a specific embodiment of the present invention, a stirring module 7 is provided inside the stirring tank 3. The stirring module 7 includes a transmission rod 701, a stirring motor 702, and a stirring frame 703. The transmission rod 701 is rotatably connected to the inner top wall of the stirring tank 3 via bearings. The stirring motor 702 is fixedly installed on the top of the stirring tank 3, and the top end of the transmission rod 701 is coaxially and fixedly connected to the output shaft of the stirring motor 702. The stirring frames 703 are arranged spirally on the transmission rod 701. In this embodiment, two stirring frames 703 are symmetrically arranged on the transmission rod 701, and each stirring frame 703 consists of multiple stirring rods fixed to a connecting rod.

[0053] The design employs a combination of angular contact ball bearings and sealing washers, ensuring the stability of the transmission rod 701's rotation while effectively preventing leakage of repair materials (such as asphalt mortar and polymer repair agents) from the bearing connections during mixing, thus improving the equipment's sealing performance. By selecting a speed-adjustable servo motor as the mixing motor 702, the mixing speed can be flexibly adjusted according to the viscosity characteristics of the repair materials (such as low-viscosity polymer materials and high-viscosity asphalt mixtures). Low-viscosity materials use a high speed (300-500 r / min) for rapid mixing, while high-viscosity materials use a low speed (50-200 r / min) to prevent material from flying off. The precise speed control of the servo motor ensures a uniform and stable mixing process, avoiding uneven mixing in certain areas. By designing the two mixing racks 703 in a spirally symmetrical distribution, combined with the multi-layered structure of the connecting rod and mixing rod, a three-dimensional spiral mixing trajectory is formed. This not only achieves radial diffusion mixing of the repair material but also produces an axial up-and-down tumbling effect, breaking the "mixing dead zones" present in traditional planar mixing. This ensures that the material at the bottom and edge areas of the mixing tank 3 is fully mixed and broken down, thereby meeting the high-efficiency operation requirements for rapid repair of road surface cracks, ensuring the performance stability of the repair material, and improving the firmness and durability of the crack repair.

[0054] Furthermore, a feed inlet 8 is provided at the top of the mixing tank 3, located on one side of the mixing motor 702. A sealing cover is hinged to the top of the feed inlet 8. A rubber sealing gasket is provided on the inner side of the sealing cover, and a handle is fixedly installed on the outer side of the sealing cover. The sealing cover and the edge of the feed inlet 8 are detachably locked together by a snap-fit ​​mechanism to ensure the airtightness of the tank during mixing. Preferably, the feed inlet 8 has a funnel-shaped structure, which facilitates the rapid introduction of repair materials and prevents spillage.

[0055] In addition, a discharge port 9 is provided at the bottom of the mixing tank 3, and its inner wall is coated with a wear-resistant ceramic coating to prevent wear caused by long-term erosion of the high-hardness repair material. A feeding pipe 10 is fixedly connected to the discharge port 9 via a raised face flange, and the end of the feeding pipe 10 extends to the bottom of the carrier trolley 1. In this embodiment, a flexible sealing gasket is provided at the flange connection, and a sealed connection is achieved by evenly tightening bolts. The feeding pipe 10 has a Z-shaped structure and is used to deliver the repair material to the bottom of the front side of the repair device. The feeding pipe 10 is made of 304 stainless steel, and its diameter is adapted to the inner diameter of the discharge port 9.

[0056] The design of the inlet 8, with its funnel-shaped structure, expands the top feeding area, reducing the probability of spillage during material introduction. The converging inner diameter design guides the material to quickly converge inside the mixing tank 3, preventing material accumulation at the inlet edge. The combination of a sealing cover, rubber gasket, and snap-fit ​​design ensures a sealed tank during mixing, preventing material splashing or dust leakage that could pollute the environment. It also prevents external impurities from entering the mixing tank and affecting the purity of the repair material. The handle design facilitates quick opening and closing for operators. The wear-resistant ceramic coating on the inner wall of the outlet 9 significantly enhances its wear resistance and extends its service life, making it particularly suitable for conveying repair materials containing hard aggregates. The combination of a flange and a flexible sealing gasket ensures a secure seal between the outlet 9 and the feeding pipe 10, effectively preventing leakage of the uniformly mixed material during transport. The flange connection also facilitates later disassembly and maintenance. By using 304 stainless steel to make the feeding pipe 10, both corrosion resistance and high temperature resistance are taken into account (suitable for hot-mix repair materials and structural strength, avoiding damage to the conveying pipe due to material impact or environmental corrosion).

[0057] Furthermore, an electrically controlled valve 11 is provided on the feeding pipe 10, and a repair nozzle 12 is fixedly connected to the end of the feeding pipe 10.

[0058] The electrically controlled valve 11 is an electromagnetic shut-off valve with a rated working pressure of 0.8-1.2 MPa and a diameter compatible with the feed pipe 10 (100-150 mm). The repair nozzle 12 has a flat structure with a spray nozzle width of 50-100 mm and a flow-dividing grid inside the spray nozzle. The flow-dividing grid divides the spray channel into 3-5 evenly distributed sub-channels. The spray direction of the repair nozzle 12 is inclined downward at 30-45° to the travel direction of the pallet truck 1, and the center of the nozzle is in the same vertical projection plane as the flattening mechanism 4 and the waste separation mechanism 6 at the bottom of the pallet truck 1, accurately aligning with the road crack area. By designing the repair nozzle 12 as a flat structure with a built-in flow-dividing grid, the columnar conveyed material can be transformed into a uniform fan-shaped spray flow, ensuring that the material can be evenly spread along the crack width direction, covering the entire crack cross section. At the same time, the flow-dividing grid can break up any small agglomerates that may remain in the material, improving the filling density. By designing the nozzle spray direction to be tilted downwards at 30-45°, material rebound and splashing during spraying are avoided, and gravity assists the material to quickly fill to the bottom of the crack, reducing air bubble residue. By aligning the projections of the repair nozzle, leveling mechanism, and waste separation mechanism, a continuous "filling-leveling-waste cleaning" operation chain is formed. After filling, the material can be immediately leveled and excess material disposed of by subsequent mechanisms without additional equipment adjustments, significantly improving the continuity and efficiency of the repair operation. The coordinated design of the integrated electronic control valve and repair nozzle improves the accuracy of crack filling by over 40% and increases material utilization by 25%, while simplifying the operation process. A single person can complete material control and repair work, fully meeting the on-site needs for rapid, efficient, and high-quality repair of highway pavement cracks.

[0059] In a specific embodiment of the present invention, four universal wheels 13 are evenly arranged at the bottom of the pallet truck 1, and each universal wheel 13 is equipped with a brake mechanism. Along the forward direction, a pusher frame 14 is fixedly connected to the rear side wall of the pallet truck 1, and a control panel 15 is provided on the rear side wall of the pallet truck 1 for controlling the operation of the telescopic rod 5, the adjusting motor 603, the stirring motor 702, and the electric control valve 11.

[0060] The omnidirectional wheels 13 allow for flexible steering and movement of the equipment on the road surface. Whether traveling in a straight line to the crack location or fine-tuning the equipment angle during operation, it is easy to operate, especially suitable for scenarios with irregularly distributed road cracks. At the same time, the braking mechanism equipped with each omnidirectional wheel 13 can quickly fix the carrier trolley 1 after the equipment reaches the designated repair position, avoiding problems such as the repair nozzle 12 deviating from the crack or the flattening mechanism 4 not pressing in the correct position due to equipment slippage during operation, ensuring accurate and stable repair work. By fixing the push frame 14 to the left side wall of the carrier trolley 1, a convenient force application point is provided for the worker, and a single person can push the equipment to move without the need for additional large traction equipment, reducing labor costs and operating threshold. In addition, the height and grip angle of the push frame 14 are optimized and designed in accordance with ergonomic principles, which can reduce the fatigue of the worker when pushing for a long time. By setting up a control panel 15 on the left side wall of the carrier trolley 1, all electrical control functions, such as starting and stopping the mixing motor 702 and adjusting its speed, regulating the operation of the motor 603, opening and closing the electric control valve 11, and extending and retracting the telescopic rod 5, are centrally integrated. This allows operators to complete the entire process control without having to move back and forth between different parts of the equipment, greatly improving operational convenience and work efficiency. At the same time, the control panel 15 is equipped with clear indicator lights and operation button labels, reducing the risk of misoperation and ensuring safe and orderly operation.

[0061] This invention also provides a construction method for a rapid repair device for highway pavement cracks. Using the aforementioned repair device, the specific construction steps include:

[0062] S1: Preliminary preparation: Add road repair material into the mixing tank 3 through the feed inlet 8, close the sealing cover, start the mixing motor 702 to drive the transmission rod 701 and the mixing frame 703 to rotate, and mix and crush the repair material. The mixing time is 3-8 minutes to ensure that the repair material is mixed evenly.

[0063] Specifically, by setting a funnel-shaped feed inlet 8, the road repair material can slide more smoothly into the mixing tank 3, avoiding material accumulation and spillage during the feeding process. At the same time, the sealing cover plate equipped with the feed inlet 8 can prevent external dust, sand and other impurities from entering the mixing tank 3 during the mixing process, ensuring the purity of the repair material and preventing impurities from affecting the adhesion and strength of the repair material. The mixing motor 702 is started through the control panel 15. The mixing motor 702 drives the transmission rod 701 and the spirally distributed double-layer mixing frame 703 to rotate. The double-layer mixing frame 703 can perform three-dimensional spiral mixing and crushing of the repair material in the mixing tank 3, which can not only break up material lumps, but also eliminate mixing dead corners, so that repair materials with different components can be fully mixed evenly. The mixing time is set to an adjustable range of 3-8 minutes, which can be adapted to repair materials with different viscosities and different component ratios. For materials with lower viscosity, the mixing time can be shortened to 3-5 minutes to avoid over-mixing and changes in material properties. For materials with high viscosity and complex composition, the mixing time is extended to 6-8 minutes to ensure thorough mixing and provide a stable quality repair material for subsequent precise filling of cracks.

[0064] S2: Positioning Adjustment: Push the platen trolley 1 to the location of the road crack, start the adjustment motor 603 to drive the bidirectional threaded rod 602 to rotate, and drive the two movable sleeve blocks 604 to move relative to or towards each other along the guide slide 608. Adjust the distance between the two waste separation modules 607 according to the crack width to make it match the crack width.

[0065] Specifically, by pushing the pallet truck 1 to the location of the road crack, and with the help of the flexible steering capability of the bottom casters 13, the equipment can be quickly and accurately moved to the target work area. Even if the road surface is narrow or the crack is located in a complex location such as a bend or corner, the equipment position can be easily adjusted. The swivel casters 13 are used to secure the carrier trolley 1, ensuring stability during repair work and preventing it from slipping due to minor road unevenness or applied force. This ensures the accuracy of subsequent filling and compaction processes. The control panel 15 activates the adjustment motor 603, driving the bidirectional threaded rod 602 to rotate. The opposite thread directions at both ends of the bidirectional threaded rod drive the two movable blocks 604 to move synchronously relative to or towards each other along the guide groove 608. This linkage adjustment method eliminates the need to operate the two components separately, allowing the spacing between the two waste separation modules 607 to quickly match the crack width (1-50mm). This simplifies the operation process and ensures that the two components are always symmetrically distributed around the crack, preventing incomplete waste removal or scraping of the normal road surface due to unilateral offset. The speed adjustment function of the motor (stepper motor) allows for flexible control of the adjustment speed according to the crack width adjustment range, significantly improving the efficiency and accuracy of positioning adjustment.

[0066] S3: Crack Repair: Open the electric control valve 11 via the control panel 15. The repair material, which is mixed evenly in the mixing tank 3, is sprayed into the crack through the feed pipe 10 from the repair nozzle 12, ensuring that the repair material fills the crack and is slightly higher than the road surface.

[0067] Specifically, by opening the electric control valve 11 via the control panel 15, the timing of the output of repair material in the mixing tank 3 can be precisely controlled, preventing premature leakage or delayed spraying. The electric control valve 11 also responds quickly to the opening and closing, flexibly starting and stopping in sync with the spraying rhythm. The design of the feeding pipe 10 buffers the impact force during material transport, preventing material from splashing out of the crack area due to excessive flow rate, and guides the material to flow steadily towards the repair nozzle 12. Combined with the flat structure and diversion grid of the nozzle 12, the repair material is evenly dispersed, avoiding local accumulation or uneven filling, ensuring the crack is fully filled. By allowing workers to control the spraying time according to the crack depth, it can adapt to road cracks of different depths: for shallow cracks (depth < 10mm), the spraying time is shortened to avoid excessive material overflow. For deep cracks (depth > 20mm), the spraying time is appropriately extended to ensure the material fills the crack gaps layer by layer, while controlling the material slightly above the road surface to leave sufficient compaction allowance for subsequent rolling processes, ensuring the final repair surface is flush with the original road surface.

[0068] S4: Smoothing treatment: After the crack repair is completed, push the platen 1 to continue moving so that the smoothing mechanism 4 can compact the filled crack area.

[0069] In this process, by pushing the plate carrier 1 to continue moving forward, the flattening rollers 406 of the flattening mechanism 4 are simultaneously pressed onto the crack area that has just been filled. The power of the plate carrier's movement drives the rollers to roll, eliminating the need to separately start the drive components for the flattening process, thus simplifying the equipment structure and operation process. Meanwhile, the polyurethane wear-resistant layer wrapped around the outer periphery of the flattening roller 406 not only enhances the compaction effect on the repair material but also prevents the roller from scratching the original road surface. Combined with the adhesion pressure between the roller and the road surface, the repair material, which is slightly higher than the road surface, can be evenly compacted to be flush with the original road surface, ensuring the flatness of the repair surface. By setting an elastic scraper 404 in the flattening mechanism 4 that is in contact with the flattening roller 406, the repair material adhering to its outer periphery can be scraped off in real time during the roller's rolling process. This not only avoids the accumulation of adhering material affecting the flatness of the rolling process but also prevents excess material from being carried to non-repair areas and causing pollution. At the same time, the scraper is made of elastic wear-resistant rubber, which can reduce wear on the roller surface while adhering to the roller, extend the service life of the components, and further ensure the stable effect of the flattening process.

[0070] S5: Waste leveling: While compacting and leveling, the telescopic rod 5 is extended through the control panel 15, which drives the residual material separation mechanism 6 to descend, so that the lifting shovel plate 6073 fits against the road surface, lifting up the excess repair material in the cracks and surrounding areas, and separating it from the ground.

[0071] Specifically, the extension rod 5 can be extended by controlling the control panel 15, which can precisely adjust the lowering height of the residual material separation mechanism 6, ensuring that the wear-resistant serrated structure of the lifting shovel 6073 fits the road surface perfectly; it will not be too high to lift excess material, nor too low to cause the shovel to scrape the original road surface and cause damage, thus adapting to road operation scenarios with different flatness. Meanwhile, the telescopic rod's extension and retraction speed is controllable, allowing for flexible adjustment of the mechanism's descent timing according to the work rhythm, thus coordinating with the leveling process. Through the tungsten carbide wear-resistant serrated structure at the bottom of the lifting shovel plate 6073, excess repair material inside and around the cracks can be efficiently scooped up when the pallet truck moves slowly. The serrated design increases the contact friction with the material, making it easy to separate even slightly solidified material. The side guide shovel plate 6072 forms a 120-150° angle with the lifting shovel plate, which diverts the scooped waste material outward along the inclined channel, preventing excess material from accumulating in the crack area and causing secondary unevenness. At the same time, the high wear resistance of the tungsten carbide material also extends the service life of the shovel plate, reducing the cost of frequent part replacements.

[0072] S6: Final inspection: After the flattening and waste separation are completed, push the pallet truck 1 away from the work area and turn off all working parts through the control panel 15; at the same time, the staff cleans up the excess repair material and checks the flatness of the repaired road surface. If there are local uneven areas, repeat steps S3-S5 for secondary processing to ensure that the repaired road surface is flush with the original road surface and has no bumps or depressions.

[0073] Specifically, by pushing the pallet truck 1 away from the work area, the equipment can be prevented from occupying the repaired road surface, thus preventing crushing damage to the incompletely cured repair material during subsequent cleaning or inspection. This also provides ample operating space for workers. All working components are centrally shut down via the control panel 15, eliminating the need to individually shut down motors, valves, and other components. This simplifies the finishing process, reduces the risk of operational omissions, and allows for timely power cut-off, reducing energy consumption and component wear. Workers manually clean up any remaining excess repair material shoveled up in step S5, thoroughly removing loose debris from the road surface and preventing waste accumulation that could affect road aesthetics or future driving safety. Simultaneously, the smoothness of the repaired road surface is carefully checked. Visual observation and simple inspection tools (such as a straightedge) are used to confirm the presence of bumps, depressions, or other problems. Steps S4-S5 are repeated for uneven areas to perform secondary leveling and waste removal, precisely compensating for any deficiencies in the initial work. This ensures the repaired road surface is flush with the original road surface, meeting the requirements for road smoothness for highway traffic and extending the service life of the repaired area.

[0074] In summary, this rapid road surface crack repair device and construction method, through the integrated design of a pallet truck that combines four core functions—mixing, filling, leveling, and waste separation—with the flexible movement of the swivel casters 13 and the stable fixation of the braking mechanism, achieves continuous operation throughout the entire process from material mixing to road surface repair and waste material cleaning. It eliminates the need for frequent equipment changes or workstation adjustments, significantly shortens the repair cycle for a single crack, and solves the problems of dispersed procedures and low efficiency in traditional repair processes.

[0075] Furthermore, by incorporating a residual material separation mechanism 6, the equipment can precisely adapt to cracks of varying widths during cleaning. The spirally distributed mixing rack 703 and the adjustable-speed mixing motor 702 ensure uniform mixing of the repair material. The wear-resistant flattening rollers 406 and the waste separation module 607 guarantee the smoothness of the repaired surface. The serrated structure and guiding design of the lifting shovel plate 6073 efficiently remove excess waste. The synergistic effect of these multiple components not only improves the repair quality, ensuring the repaired road surface is flush with the original surface, strong, and durable, but also reduces labor costs and material waste, solving the problems of poor adaptability and inconsistent repair results associated with traditional repair methods.

[0076] The above description is merely an illustrative embodiment of the present invention. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A rapid repair device for road surface cracks, characterized in that, The repair device includes: a carrier (1), a fixed frame (2) is fixedly installed on the carrier (1), a mixing tank (3) is fixedly connected to the inner wall of the fixed frame (2), and the bottom of the mixing tank (3) delivers the repair material in the mixing tank (3) to the ground crack through the feeding pipe (10); Along the forward direction of the repair device, a flattening mechanism (4) is provided on the rear side of the discharge port of the feeding pipe (10) at the bottom of the carrier (1), and a telescopic rod (5) is provided on the rear side of the flattening mechanism (4). The movable end of the telescopic rod (5) is provided with a material separation mechanism (6) for cleaning up excess repair material on the ground surface. The flattening mechanism (4) includes a concave connecting frame (401) and a roller frame (402). The concave connecting frame (401) is fixedly installed at the bottom of the carrier (1). The top of the roller frame (402) is detachably fixedly connected to the groove of the concave connecting frame (401) by bolts and nuts. The front side wall of the roller frame (402) is provided with a slot (403). Two limiting plates (405) are fixedly installed at both ends of the bottom of the roller frame (402). A flattening roller (406) is rotatably connected between the two limiting plates (405) by a bearing. The axis of the flattening roller (406) is perpendicular to the traveling direction of the carrier (1). A scraper (404) is fixedly installed inside the slot (403). One end of the scraper (404) is in contact with the outer peripheral wall of the flattening roller (406).

2. The rapid repair device for road surface cracks according to claim 1, characterized in that, The waste material separation mechanism (6) includes an adjustment box (601) fixedly installed at the bottom of the carrier (1). The interior of the adjustment box (601) is rotatably connected to a bidirectional threaded rod (602) via a bearing. An adjustment motor (603) is fixedly installed on the outside of the adjustment box (601). The output shaft of the adjustment motor (603) is coaxially fixedly connected to one end of the bidirectional threaded rod (602). Two symmetrically arranged movable sleeves (604) are threadedly connected to the bidirectional threaded rod (602). Two guide limit blocks (605) connected to the inner wall of the adjustment box (601) are fixedly installed on the outer wall of each movable sleeve (604). A T-shaped connecting frame (606) extending to the outside of the bottom of the adjustment box (601) is fixedly connected to the bottom of each movable sleeve (604). A waste material separation module (607) is provided at one end of each T-shaped connecting frame (606) extending to the outside of the bottom of the adjustment box (601).

3. The rapid repair device for road surface cracks according to claim 2, characterized in that, The waste separation module (607) includes an upper cover plate (6071), a side guide shovel plate (6072), and a lifting shovel plate (6073), wherein, The top of the upper cover plate (6071) is fixedly connected to the bottom of the T-shaped connecting frame (606). The side guide shovel plate (6072) is fixedly installed below the upper cover plate (6071). The lifting shovel plate (6073) is fixedly installed at the bottom of the side guide shovel plate (6072). The included angle between the front end face of the side guide shovel plate (6072) and the lifting shovel plate (6073) is 120-150°, forming an outwardly inclined guide channel, which facilitates the diversion of waste to both sides.

4. The rapid repair device for road surface cracks according to claim 2, characterized in that, The threads at both ends of the bidirectional threaded rod (602) are turned in opposite directions, and the internal threads of the two movable sleeves (604) are adapted to the threads at both ends of the bidirectional threaded rod (602). The regulating motor (603) is a stepper motor; The inner wall of the adjustment box (601) has two guide grooves that are adapted to the guide limiting block (605), and the guide limiting block (605) slides in cooperation with the guide groove.

5. The rapid repair device for road surface cracks according to claim 1, characterized in that, The mixing tank (3) is equipped with a mixing module (7), which includes a transmission rod (701), a mixing motor (702), and a mixing frame (703). The transmission rod (701) is rotatably connected to the inner top wall of the mixing tank (3) through a bearing. The stirring motor (702) is fixedly installed on the top of the mixing tank (3). The top end of the transmission rod (701) is coaxially fixedly connected to the output shaft of the stirring motor (702). The stirring frame (703) is provided on the transmission rod (701) and is spirally distributed.

6. The rapid repair device for road surface cracks according to claim 5, characterized in that, A feed inlet (8) is provided on the top of the mixing tank (3) and on one side of the mixing motor (702), and a sealing cover is hinged to the top of the feed inlet (8); The bottom of the mixing tank (3) is provided with a discharge port (9), and a feeding pipe (10) is fixedly connected below the discharge port (9) by a flange, and the end of the feeding pipe (10) extends to the bottom of the carrier (1).

7. The rapid repair device for road surface cracks according to claim 6, characterized in that, An electric control valve (11) is provided on the feeding pipe (10), and a repair nozzle (12) is fixedly connected to the end of the feeding pipe (10).

8. The rapid repair device for road surface cracks according to claim 1, characterized in that, The bottom of the pallet truck (1) is evenly provided with four casters (13), each caster (13) is equipped with a brake mechanism, and a pusher (14) is fixedly connected to the rear side wall of the pallet truck (1) along the forward direction. A control panel (15) is provided on the rear side wall of the pallet truck (1).

9. The rapid repair device for road surface cracks according to claim 1, characterized in that, The scraper (404) is made of elastic wear-resistant rubber material; The contact pressure between the scraper (404) and the flattening roller (406) is 0.3-0.8 MPa, and the outer peripheral wall of the flattening roller (406) is covered with a polyurethane wear-resistant layer.

10. A construction method for a rapid repair device for highway pavement cracks, characterized in that, The specific construction steps of using the repair device according to any one of claims 1-9 include: S1: Preliminary preparation: Add road repair material into the mixing tank (3) through the feed inlet (8), close the sealing cover, start the mixing motor (702) to drive the transmission rod (701) and the mixing frame (703) to rotate, and mix and crush the repair material. The mixing time is 3-8 minutes to ensure that the repair material is mixed evenly. S2: Positioning adjustment: Push the plate car (1) to the location of the road crack, start the adjustment motor (603) to drive the bidirectional threaded rod (602) to rotate, and drive the two movable sleeves (604) to move relative to or towards each other along the guide slide (608). Adjust the distance between the two waste separation modules (607) according to the crack width to make it match the crack width. S3: Crack Repair: Open the electric control valve (11) through the control panel (15), and the repair material mixed evenly in the mixing tank (3) is sprayed into the crack through the feed pipe (10) from the repair nozzle (12) to ensure that the repair material fills the crack and is slightly higher than the road surface; S4: Smoothing treatment: After the crack repair is completed, push the platen vehicle (1) to continue moving, so that the smoothing mechanism (4) can compact the filled crack area; S5: Waste leveling: While compacting and leveling, the telescopic rod (5) is extended through the control panel (15), which drives the residual material separation mechanism (6) to descend, so that the lifting shovel plate (6073) fits against the road surface, and lifts up the excess repair material in the crack and the surrounding area, so that it separates from the ground. S6: Final inspection: After the flattening and waste separation are completed, push the pallet truck (1) away from the work area and turn off all working parts through the control panel (15); at the same time, the staff clean up the excess repair material and check the flatness of the repaired road surface. If there are local uneven areas, repeat steps S3-S5 for secondary processing to ensure that the repaired road surface is flush with the original road surface and has no protrusions or depressions.

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