Asphalt pavement microwave heating maintenance repair device and positioning method

Abstract

The present application relates to the technical fields of asphalt pavement maintenance, and especially relates to an asphalt pavement microwave heating maintenance and repair device and positioning method, which comprises a box body, a connecting frame is rotatably arranged on the inner side of the box body, a heating mechanism for heating the asphalt pavement is arranged on the bottom of the connecting frame, a tamping mechanism for leveling the asphalt pavement is arranged on the top of the connecting frame, the heating mechanism comprises a rotary bottom plate one fixedly arranged on the bottom of the connecting frame, a rice-shaped track fixedly arranged on the rotary bottom plate one, straight tracks are respectively fixedly communicated on the two sides of the rice-shaped track, and a plurality of magnetrons are arrayed and distributed on the bottom of the rotary bottom plate one. The position of the magnetrons is matched with the size and shape of the inspection well cover, the multiple magnetrons are surrounded to form a shape, the center of the inspection well cover is aligned, the accurate repair of the asphalt pavement around the inspection well cover can be mainly realized, and the accurate repair of the asphalt pavement on the edge of the road can be realized by moving the magnetrons to the straight tracks.

Description

Technical Field

[0001] This invention relates to the field of asphalt pavement maintenance technology, and in particular to an asphalt pavement microwave heating maintenance and repair device and positioning method. Background Technology

[0002] Under the long-term effects of load and climate factors, asphalt pavement will develop cracks and other defects. If not repaired in time, the load-bearing capacity of the pavement will be greatly reduced, which will not only affect the driving comfort of drivers, but may even cause serious traffic accidents. In order to repair the cracks in asphalt pavement evenly and efficiently, microwave heating can be used to repair the cracks in asphalt pavement.

[0003] Existing microwave-heated asphalt pavement maintenance devices can maintain and repair most pavements, but they cannot heat the area around manhole covers and the edges of the pavement. Traditional microwave heating devices for pavements typically have magnetrons arranged in a square pattern, making it difficult to precisely heat and maintain the area around manhole covers during actual repairs. If the magnetrons are positioned above the manhole cover, the metal cover can cause microwave energy to be reflected back to the magnetrons, leading to overload damage. As a result, the actual maintenance effect of the device is poor. Furthermore, manually compacting and leveling the heated asphalt can easily damage the manhole cover, and may result in uneven compaction or failure to achieve a smooth surface. Currently, there are numerous manhole covers on urban roads. Those located on driving lanes are frequently run over by vehicles. During this process, the stress distribution around the manhole cover becomes discontinuous and excessively concentrated, making the road surface more prone to cracking and damage. These are the areas most in need of heat repair. If not treated promptly with heat repair, the cracks will rapidly develop, causing the asphalt layer to loosen and peel off, exacerbating the settlement of the manhole cover, severely impacting driving comfort, and even leading to traffic accidents. The difficulty and cost of repair are also constantly increasing. Therefore, it is extremely necessary to invent a microwave heating maintenance and repair device for asphalt pavements to solve the above problems. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides an asphalt pavement microwave heating maintenance and repair device and positioning method, which solves the technical problem that existing technologies have difficulty in accurately and effectively heating and maintaining the area around manhole covers.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A positioning method for an asphalt pavement microwave heating maintenance and repair device, the device comprising a housing, a connecting frame rotatably mounted inside the housing, a heating mechanism for heating the asphalt pavement at the bottom of the connecting frame, and a compaction mechanism for leveling the asphalt pavement at the top of the connecting frame; the heating mechanism includes a rotating base plate fixedly mounted at the bottom of the connecting frame, and a star-shaped track fixedly mounted on the rotating base plate, with straight tracks fixedly connected to both sides of the star-shaped track; a plurality of arrayed magnetrons are mounted at the bottom of the rotating base plate, with slots at the top of the magnetrons that can move arbitrarily on the star-shaped track or the straight tracks; and a boundary sensing device for locating the edge of a manhole cover fixedly mounted on the side of the magnetrons. The method is characterized by the following steps: S1: First, move the box body above the manhole cover so that all the boundary sensing devices are above the manhole cover. Then, control the four boundary sensing devices to move simultaneously along the horizontal track to the edge of the manhole cover and obtain the distances a, b, c, and d from the center of the rotating base plate. S2: Based on a, b, c, and d obtained in S1, the distance that the connecting frame needs to move in the horizontal direction is calculated using the following formula; ,

[0006] S3: Based on a, c, and Δy obtained from S1 and S2, adjust the front and rear positions of the connecting frame using the horizontal track, and simultaneously adjust the left and right distance of the connecting frame using the rotating telescopic cylinder. After moving, the center of the circle will be aligned. The radius of the manhole cover is obtained according to the following formula:

[0007] In the formula, Δx—the distance to be adjusted by the rotary telescopic cylinder, m; Δy—the distance moved along the direction of device movement, m; the distance the four magnetrons corresponding to a, b, c, and d move along the track to the boundary of the manhole cover, m; R—the radius of the manhole cover, m; S4: The microwave emitted by the magnetron acts as a rectangle along the waveguide cavity on the asphalt pavement. During the rotation of the rotating base plate, it forms a circular region, making the rectangle tangent to the edge of the manhole cover. Determine the distance from the center point of the magnetron to the center of the manhole cover. Input the radius of the manhole cover obtained in S3, and obtain the outer diameter of the magnetron arrangement according to the following formula:

[0008] In the formula, R—outer diameter of the magnetron arrangement, m; b—width of the magnetron, m; r—radius of the manhole cover, m; h—height of the magnetron, m; θ—tilt angle of the waveguide cavity, º; S5: Finally, based on the outer diameter of the magnetron arrangement in S4, move the magnetron a corresponding distance to accurately position it around the manhole cover.

[0009] Preferably, a rotary telescopic cylinder is provided at each end of the connecting frame, and the rotary telescopic cylinder moves up and down on the track on the box wall to control the overall height. The rotary telescopic cylinder can extend and retract to adjust the position of the entire connecting frame and calibrate to align the centers of the upper and lower parts. A horizontal track is fixedly provided at each end inside the box.

[0010] Preferably, the compaction mechanism includes a rotary base plate two fixedly installed on the top of the connecting frame, and a plurality of electric compactors arranged in an array on the top of the rotary base plate two for compacting and repairing the road surface.

[0011] Preferably, the electric compactor includes a hammer mounted on the top of the rotary base plate II, a vertical guide rod fixedly mounted on one side of the hammer, a fixed electromagnetic block mounted on the top of the vertical guide rod, a movable electromagnetic block fixed to the vertical guide rod mounted at the bottom of the fixed electromagnetic block, and a shock-absorbing spring connected to the rotary base plate II fixedly mounted on the fixed electromagnetic block.

[0012] Preferably, a conductive wire is provided on the movable electromagnetic block, and a wire hole is provided inside the vertical guide rod, through which the wire passes and is electrically connected to the movable electromagnetic block.

[0013] Preferably, casters are fixedly installed at the four corners of the bottom of the housing, and rotary motors for driving the rotation of the first rotary base plate and the second rotary base plate are fixed on both sides of the connecting frame.

[0014] Preferably, a vertical rail fixed to the housing is provided in the middle of the horizontal rail, and electrically driven slides that are slidably connected to the horizontal and vertical rails are fixed on both sides of the connecting frame.

[0015] By employing the above technical solution, the present invention provides an asphalt pavement microwave heating maintenance and repair device and positioning method, which, compared with the prior art, has at least the following beneficial effects: 1. This invention, by setting up a heating mechanism, can achieve comprehensive and full-coverage road repair for various road surfaces, including conventional asphalt pavement, asphalt pavement around manhole covers, and asphalt pavement at the road edge. By freely moving the magnetron on the star-shaped track, the position of the magnetron is matched with the size and shape of the manhole cover at the target heating area, so that the center of the shape formed by multiple magnetrons is aligned with the center of the manhole cover. This can mainly achieve precise repair of asphalt pavement around manhole covers. By moving the magnetron to a straight track, precise repair of asphalt pavement at the road edge can be achieved, thus expanding the applicable scope of this maintenance device.

[0016] 2. This invention uses a 45-degree reciprocating rotation of the base plate to uniformly heat the entire circular area around the manhole cover using multiple magnetrons. After heating, the plate is flipped over, allowing the electric compactor to rotate and compact the circular area under the drive of the base plate. Road surface heating and compaction are carried out in one process, greatly improving the efficiency of asphalt pavement repair.

[0017] 3. This invention obtains the distance from the center of the rotating base plate to the edge of the manhole cover in the horizontal direction through four boundary sensing devices, calculates the distance the device needs to move in the horizontal direction, achieves center alignment through self-adjustment, and obtains the radius of the manhole cover, so that the magnetron can be accurately positioned around the manhole cover.

[0018] 4. This invention determines the heating area through calculation, so that the heatable area is tangent to the edge of the manhole cover, avoiding the metal manhole cover reflecting microwave energy back to the magnetron and causing overload damage. At the same time, it improves the utilization rate and increases the area of ​​heating and repairing asphalt pavement.

[0019] 5. This invention reduces the impact of the electric compactor's up-and-down and left-and-right swaying caused by vibration on the base plate and other devices by using a shock-absorbing spring on the upper part of the compactor. It uses a strong current to make two electromagnets alternately attract and repel each other, so that the hammer moves up and down and back and forth under the action of electromagnetic force to compact the asphalt pavement. It can compact with small space and small vibration, realizing fully automatic pavement repair without the need for manual use of the hammer. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a diagram showing the layout of the magnetrons for roadside maintenance according to the present invention. Figure 3 This is a diagram showing the layout of the magnetic control tubes for road surface and manhole cover maintenance according to the present invention. Figure 4 This is a schematic diagram of the layout and track of the compactor of the present invention; Figure 5 This is a diagram showing the movement track of the rotary telescopic hydraulic cylinder on the housing according to the present invention; Figure 6 This is a schematic diagram of the structure of the electric compactor of the present invention; Figure 7 This is the center calibration diagram of the present invention; Figure 8 This is a diagram of the heating ring region of the present invention.

[0021] In the diagram: 3. Rotary telescopic cylinder; 4. Magnetron; 5. Casters; 6. Connecting frame; 6-1. Cross-shaped track; 6-2. Straight track; 8. Rotary base plate one; 9. Rotary motor; 11. Box body; 13. Edge sensing device; 16. Rotary base plate two; 17. Horizontal track; 18. Vertical track; 7. Electric tamper; 7-1. Shock-absorbing spring; 7-2. Fixed electromagnetic mechanism; 7-3. Hammer; 7-4. Wire; 7-5. Movable electromagnetic mechanism; 7-6. Vertical guide rod. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Figures 1-8 An embodiment of the present invention: an asphalt pavement microwave heating maintenance and repair device includes a housing 11, with universal wheels 5 fixedly installed at the four corners of the bottom of the housing 11, so that the device can be manually pushed onto the road for pavement repair. A connecting frame 6 is rotatably arranged inside the housing 11. A heating mechanism for heating the asphalt pavement is arranged at the bottom of the connecting frame 6, and a compaction mechanism for leveling the asphalt pavement is arranged at the top of the connecting frame 6. A fan for heat dissipation is installed on the top of the housing 11, and a battery pack fixed to the housing 11 is installed at the bottom of the fan. The battery pack is used to provide power to the maintenance device. The power supply is common knowledge in the field. The present invention is mainly used to protect mechanical devices. The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. Therefore, the control method and circuit connection will not be explained in detail in the present invention. The heating mechanism includes a rotating base plate 8 fixedly mounted on the bottom of the connecting frame 6, and a star-shaped track 6-1 fixedly mounted on the rotating base plate 8. Straight tracks 6-2 are fixedly connected to both sides of the star-shaped track 6-1. Several arrayed magnetrons 4 are arranged at the bottom of the rotating base plate 8. The top of the magnetron 4 is provided with a slot, which can move arbitrarily on the star-shaped track 6-1 or the straight track 6-2. The rotating base plate 8 allows the magnetron 4 to rotate a certain degree to heat the entire perimeter area of ​​the manhole cover. A boundary sensing device 13 for positioning the edge of the manhole cover is fixedly mounted on the side of the magnetron 4. When the magnetron 4 moves, rotates, and flips on the star-shaped track 6-1, its power supply wires are connected from both ends, and the rotating base plate 8 rotates within a 45° range to ensure that the power supply wires connected to the magnetron 4 do not get tangled when it moves, while also ensuring that the connecting frame 6 can flip stably.

[0024] Rotary telescopic cylinders 3 are respectively provided at both ends of the connecting frame 6. The rotary telescopic cylinders 3 move up and down on the track on the wall of the housing 11 to control the overall height. The rotary telescopic cylinders 3 can extend and retract to adjust the position of the entire connecting frame 6 and calibrate to align the centers of the upper and lower parts. Horizontal rails 17 are fixedly provided at both ends inside the housing 11. A vertical rail 18 fixed to the housing 11 is provided in the middle of the horizontal rails 17. Electric drive slides are fixedly provided on both sides of the connecting frame 6 and are slidably connected to the horizontal rails 17 and the vertical rails 18. When the electric drive slides on the horizontal rails 17, it can drive the connecting frame 6 to move in the horizontal direction. When the electric drive slides on the vertical rails 18, it can drive the connecting frame 6 to move in the vertical direction. The electric drive slides are externally driven and can be used to push the connecting frame 6 to move.

[0025] The compaction mechanism includes a rotating base plate 2 16 fixedly installed on the top of the connecting frame 6, and a number of electric compactors 7 arranged in an array on the top of the rotating base plate 2 16 for compacting and repairing the road surface. The electric compactor 7 includes a hammer 7-3 mounted on the top of the rotary base plate 16. A vertical guide rod 7-6 is fixedly mounted on one side of the hammer 7-3. A fixed electromagnetic block 7-2 is mounted on the top of the vertical guide rod 7-6. A movable electromagnetic block 7-5, fixed to the vertical guide rod 7-6, is mounted on the bottom of the fixed electromagnetic block 7-2. A shock-absorbing spring 7-1, connected to the rotary base plate 16, is fixedly mounted on the fixed electromagnetic block 7-2. The shock-absorbing spring 7-1 reduces the impact of the up-down and left-right swaying caused by the vibration of the electric compactor 7 on the rotary base plate 16 and other devices. The hammer 7-3 is driven by electromagnetic conversion. 3. The asphalt pavement is compacted in a small space with minimal vibration, achieving fully automated pavement repair without the need for manual tamping. A conductive wire 7-4 is installed on the movable electromagnetic block 7-5. A wire hole is opened inside the vertical guide rod 7-6, and the wire 7-4 passes through the wire hole inside the vertical guide rod 7-6 and is electrically connected to the movable electromagnetic block 7-5. The wire 7-4 is connected to a power source to provide power to the fixed electromagnetic block 7-2 and the movable electromagnetic block 7-5. The strong current causes the upper and lower electromagnets to alternately attract or repel each other, causing the tamper to reciprocate under the action of electromagnetic force to compact the heated asphalt pavement.

[0026] Rotary motors 9 are fixed on both sides of the connecting frame 6 to drive the rotation of the first rotary base plate 8 and the second rotary base plate 16. When the rotary motors 9 are started, the output shafts of the rotary motors 9 drive the first rotary base plate 8 and the second rotary base plate 16 to rotate by a certain angle. When heating the edge of the manhole cover, the first rotary base plate 8 simultaneously drives the nine magnetrons 4 to rotate, so that the magnetrons 4 heat the edge of the manhole cover more evenly.

[0027] A method for positioning an asphalt pavement microwave heating curing and repair device specifically includes the following steps: S1: First, move the box 11 above the manhole cover so that all the boundary sensing devices are above the manhole cover. Then, control the four boundary sensing devices 12 to move simultaneously along the horizontal track to the edge of the manhole cover and obtain the distances a, b, c, and d from the center of the rotating base plate 8. S2: Based on a, b, c, and d obtained in S1, the distance that the connecting frame 6 needs to move in the horizontal direction is calculated using the following formula; ,

[0028] S3: Based on a, c, and Δy obtained from S1 and S2, adjust the front and rear positions of the connecting frame 6 via the horizontal track 17, and simultaneously adjust the left and right distance of the connecting frame 6 via the rotating telescopic cylinder 3. After moving, the center of the circle will be aligned. The radius of the manhole cover is obtained according to the following formula:

[0029] In the formula, Δx—the distance to be adjusted by the rotary telescopic cylinder, m; Δy—the distance moved along the direction of device movement, m; the distance the four magnetrons corresponding to a, b, c, and d move along the track to the boundary of the manhole cover, m; R—the radius of the manhole cover, m; S4: The microwave emitted by magnetron 4 forms a rectangle along the waveguide cavity in the asphalt pavement area. During the rotation of the rotating base plate 8, it forms a circular area, making the rectangle tangent to the edge of the manhole cover. Determine the distance from the center point of magnetron 4 to the center of the manhole cover. Input the radius of the manhole cover obtained in S3, and obtain the outer diameter of the magnetron 4 according to the following formula:

[0030] In the formula, R—outer diameter of the magnetron arrangement, m; b—width of the magnetron, m; r—radius of the manhole cover, m; h—height of the magnetron, m; θ—tilt angle of the waveguide cavity, º; S5: Finally, based on the outer diameter of the magnetron 4 in S4, move the magnetron 4 by the corresponding distance to accurately position it around the manhole cover.

[0031] This invention can precisely heat the periphery of manhole covers and the edge of road surfaces of different shapes and sizes, while adjusting the position and height of the magnetron 4 makes the road surface heating more uniform.

[0032] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning method for a microwave heating maintenance and repair device for asphalt pavement, the device comprising a housing (11), a connecting frame (6) rotatably disposed on the inner side of the housing (11), a heating mechanism for heating asphalt pavement disposed at the bottom of the connecting frame (6), and a compaction mechanism for leveling asphalt pavement disposed at the top of the connecting frame (6), the heating mechanism comprising a rotating base plate (8) fixedly disposed at the bottom of the connecting frame (6), and a cross-shaped track (6-1) fixedly disposed on the rotating base plate (8), with straight tracks (6-2) fixedly connected to both sides of the cross-shaped track (6-1), a plurality of arrayed magnetrons (4) disposed at the bottom of the rotating base plate (8), a slot provided at the top of the magnetrons (4), and the slot can move arbitrarily on the cross-shaped track (6-1) or the straight track (6-2), and a boundary sensing device (13) for positioning the edge of a manhole cover fixedly disposed on the side of the magnetrons (4), characterized in that, Specifically, the steps include the following: S1: First, move the box body above the manhole cover so that all the boundary sensing devices are above the manhole cover. Then, control the four boundary sensing devices to move simultaneously along the horizontal track to the edge of the manhole cover and obtain the distances a, b, c, and d from the center of the rotating base plate. S2: Based on a, b, c, and d obtained in S1, the distance that the connecting frame needs to move in the horizontal direction is calculated using the following formula; ， ； S3: Based on a, c, and Δy obtained from S1 and S2, adjust the front and rear positions of the connecting frame using the horizontal track, and simultaneously adjust the left and right distance of the connecting frame using the rotating telescopic cylinder. After moving, the center of the circle will be aligned. The radius of the manhole cover is obtained according to the following formula: ； In the formula, Δx—the distance to be adjusted by the rotary telescopic cylinder, m; Δy—the distance moved along the direction of device movement, m; the distance the four magnetrons corresponding to a, b, c, and d move along the track to the boundary of the manhole cover, m; R—the radius of the manhole cover, m; S4: The microwave emitted by the magnetron acts as a rectangle along the waveguide cavity on the asphalt pavement. During the rotation of the rotating base plate, it forms a circular region, making the rectangle tangent to the edge of the manhole cover. Determine the distance from the center point of the magnetron to the center of the manhole cover. Input the radius of the manhole cover obtained in S3, and obtain the outer diameter of the magnetron arrangement according to the following formula: ； In the formula, R—outer diameter of the magnetron arrangement, m; b—width of the magnetron, m; r—radius of the manhole cover, m; h—height of the magnetron, m; θ—tilt angle of the waveguide cavity, º; S5: Finally, based on the outer diameter of the magnetron arrangement in S4, move the magnetron a corresponding distance to accurately position it around the manhole cover.

2. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 1, characterized in that, Rotary telescopic cylinders (3) are respectively provided at both ends of the connecting frame (6), and the rotary telescopic cylinders (3) move up and down on the track on the wall of the box (11) to control the overall height. The rotary telescopic cylinders (3) can extend and retract to adjust the position of the entire connecting frame (6) and calibrate to align the centers of the upper and lower parts. Horizontal tracks (17) are respectively fixed at both ends inside the box (11).

3. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 1, characterized in that, The compaction mechanism includes a rotary base plate two (16) fixedly installed on the top of the connecting frame (6), and a number of electric compactors (7) arranged in an array on the top of the rotary base plate two (16) for compacting and repairing the road surface.

4. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 3, characterized in that, The electric tamping machine (7) includes a tamping hammer (7-3) set on the top of the rotary base plate (16), a vertical guide rod (7-6) fixedly set on one side of the tamping hammer (7-3), a fixed electromagnetic block (7-2) set on the top of the vertical guide rod (7-6), a movable electromagnetic block (7-5) fixed to the vertical guide rod (7-6) set at the bottom of the fixed electromagnetic block (7-2), and a shock-absorbing spring (7-1) fixedly set on the fixed electromagnetic block (7-2) and connected to the rotary base plate (16).

5. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 4, characterized in that, A conductive wire (7-4) is provided on the movable electromagnetic block (7-5). A wire hole is provided inside the vertical guide rod (7-6), and the wire (7-4) passes through the wire hole inside the vertical guide rod (7-6) and is electrically connected to the movable electromagnetic block (7-5).

6. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 1, characterized in that, Universal wheels (5) are fixedly installed at the four corners of the bottom of the box (11), and rotary motors (9) for driving the rotation of the first rotary base plate (8) and the second rotary base plate (16) are fixed on both sides of the connecting frame (6).

7. The positioning method of the microwave heating curing and repair device for asphalt pavement according to claim 2, characterized in that, A vertical rail (18) fixed to the housing (11) is provided in the middle of the horizontal rail (17), and an electric drive slide block is fixedly provided on both sides of the connecting frame (6) and slidably connected to the horizontal rail (17) and the vertical rail (18).

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