An electromagnetic heating maintenance vehicle for asphalt pavement

Abstract

The present invention discloses an electromagnetic heating maintenance vehicle for asphalt pavement in the field of pavement maintenance technology, comprising a vehicle, a folding bracket, an electromagnetic generating plate, a fixing bracket and an adjusting bracket. The electromagnetic generating plate is hung on the fixing bracket, and the electromagnetic generating plate can shrink and extend backward to heat the pavement. The folding bracket can rotate and fold the outer electromagnetic generating plate 180 degrees, thereby optimizing the maintenance method of the asphalt pavement and actively performing daily maintenance and repair of the pavement. Through electromagnetic refined penetration heating, the asphalt flow activation energy is reduced, and active repair of cracks in the budding stage is achieved, greatly extending the life of the pavement. In addition, the device can automatically identify the height and temperature of the pavement to control the distance height and heating temperature between the electromagnetic coil and the pavement, thereby achieving the effect of adaptively repairing the pavement. The device can flexibly switch between normal transportation driving and construction operation, making transportation driving and construction operation more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of road maintenance, in particular to an electromagnetic heating maintenance vehicle for asphalt pavement. Background Art

[0002] Highways are a vital part of transportation infrastructure. Asphalt pavement has become the predominant paving method due to its low noise and high driving comfort. However, complex environments such as heavy loads, radiation exposure, and extreme high and low temperatures can affect the performance of asphalt pavements, leading to frequent road damage and frequent maintenance.

[0003] Current maintenance methods include chip seals, fog seals, and thin overlays. While these methods can temporarily extend the life of a pavement, they are traditional passive maintenance techniques. These conventional methods typically only detect pavement damage and the need for maintenance after macroscopic, irreversible cracks or potholes appear on the asphalt pavement, and the maintenance process requires traffic closures. Furthermore, passive maintenance techniques cannot address deep cracks within the pavement, resulting in only ineffective, temporary repairs. Small-scale repairs can make it difficult for the patch to adhere firmly to the existing pavement, making it susceptible to detachment during frequent vehicle traffic. Large-scale repairs often lead to road closures and are expensive.

[0004] In recent years, active maintenance technologies leveraging the self-healing properties of asphalt have gradually emerged, including thermal induction, microencapsulation, and chemical modification. Thermal induction repair reduces the activation energy of asphalt flow, repairing cracks at their incipient stages and significantly extending the life of the pavement. Induction heating technology has attracted considerable attention for its environmental friendliness, safety, and efficiency. While a large number of induction-heated self-healing asphalt concrete materials have been successfully developed and applied, the widespread adoption of this advanced technology is hampered by a lack of specialized equipment and control devices for road induction heating.

[0005] Based on this, the present invention designs an electromagnetic heating maintenance vehicle for asphalt pavement to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an electromagnetic heating maintenance vehicle for asphalt pavement, which can optimize the maintenance method of asphalt pavement, actively carry out daily maintenance and repair of the pavement, reduce the asphalt flow activation energy through electromagnetic fine penetration heating, realize active repair of cracks in the budding stage, and greatly extend the life of the pavement. In addition, this device can automatically identify the height and temperature of the pavement to control the distance height and heating temperature between the electromagnetic coil and the pavement, thereby achieving the effect of adaptively repairing the pavement.

[0007] The present invention is achieved in that:

[0008] An electromagnetic heating maintenance vehicle for asphalt pavement, comprising:

[0009] Vehicle, folding bracket, electromagnetic generating plate, fixing bracket and adjusting bracket;

[0010] A controller and a hydraulic actuator are installed on the vehicle;

[0011] The fixing frame is a frame structure, and the fixing frame is fixedly arranged at the rear of the vehicle;

[0012] A retractable crank is provided below the left and right sides of the fixing frame, and each retractable crank is rotatably connected to a retractable hydraulic cylinder and a supporting rod via a rotating shaft. The upper ends of the retractable hydraulic cylinder and the supporting rod are rotatably connected to the fixing frame via a hinge support.

[0013] A long cross bar is fixedly installed at the lower end of the retractable crank, and the long cross bar is horizontally arranged at the rear of the vehicle in the left-right direction. The long cross bar is arranged under the fixing frame in a manner of being retracted or expanded in the front-back direction by the retractable crank;

[0014] The folding bracket is a straight rod, and a folding bracket extends from the left and right outer ends of the long horizontal rod. Each folding bracket is flipped and folded above the long horizontal rod through a flip seat;

[0015] A plurality of height-controlling hydraulic cylinders are vertically arranged on the long crossbar and the folding bracket, and an adjustment frame is horizontally installed at the telescopic end of each height-controlling hydraulic cylinder;

[0016] An electromagnetic generator is horizontally mounted on each of the adjustment frames; multiple electromagnetic generators are respectively mounted on the long crossbar and the folding bracket so as to be able to be raised and lowered by a height-controlled hydraulic cylinder, and the electromagnetic generators extend out from the rear ends of the long crossbar and the folding bracket;

[0017] An electromagnetic generating plate is horizontally arranged at the rear end of each electromagnetic generator, and the bottom of the electromagnetic generator and the bottom of the electromagnetic generating plate are on the same plane;

[0018] A height sensor and a temperature sensor are provided at the bottom of each electromagnetic generator;

[0019] Each of the electromagnetic generators, height sensors and temperature sensors is data-connected to the controller, and each of the retractable hydraulic cylinder, auxiliary support rod, folding hydraulic cylinder and height control hydraulic cylinder is controlled by a hydraulic driver;

[0020] The hydraulic drive is connected and controlled via a controller.

[0021] Furthermore, a folding hydraulic cylinder is provided between the folding bracket and the long cross bar, the telescopic end of the folding hydraulic cylinder is connected to the folding bracket, and the fixed end of the folding hydraulic cylinder is fixed to the long cross bar;

[0022] The turning seat is a hinge support.

[0023] Furthermore, the height sensor and the temperature sensor are arranged at the front end of the electromagnetic generating plate;

[0024] A height sensor and a temperature sensor are respectively provided on the left and right sides of the bottom of each electromagnetic generator;

[0025] The height sensor is arranged at the front end of the temperature sensor;

[0026] The electromagnetic generating plate is composed of an isolation shell and an electromagnetic coil. The isolation shell is a hollow shell with an opening at the bottom. The electromagnetic coil is a copper tube. The isolation shell is included outside the electromagnetic coil, and the bottom of the electromagnetic coil is unobstructed and faces the road surface.

[0027] Furthermore, the electromagnetic generating plates are rectangular electromagnetic coils, adjacent electromagnetic generating plates do not contact each other, and the gap between adjacent electromagnetic generating plates on the left and right does not exceed 1 cm.

[0028] Furthermore, the width of the fixing frame in the left-right direction is less than 2.7m;

[0029] The left-right length of the long crossbar is smaller than the width of the fixing frame;

[0030] The total length of the long cross bar and the two folding brackets ranges from 3.2 meters to 3.8 meters.

[0031] Furthermore, the adjustment frame is a V-shaped frame, and both ends of the adjustment frame are respectively locked with the left and right sides of the same electromagnetic generator;

[0032] The fixed end of the height-control hydraulic cylinder is locked with the long cross bar or the folding bracket.

[0033] The beneficial effects of the present invention are as follows: 1. The device adds an electromagnetic coil and an electromagnetic generator, which can perform electromagnetic induction heating on the road surface, without the need for infrared and microwave heating, with little impact on the surrounding environment and minimal impact on living things. Moreover, the device can act on the asphalt on the ground without contacting the road surface, and the electromagnetic radiation is uniform and has strong permeability. In addition, an isolation shell is added to wrap the electromagnetic coil, so that the entire electromagnetic heating system only heats the road surface downward, preventing electromagnetic induction from overflowing, thereby achieving the effect of centralized heating of the road surface.

[0034] 2. This device also adds a fixed frame, a long crossbar and a folding bracket. Through the extension or rotation of the retractable hydraulic cylinder, the auxiliary support rod and the retractable crank, the long crossbar and the folding bracket can be retracted forward or extended backward to operate close to the road surface. The device can be extended in the working state for slow movement, and when rapid transfer is required, it can be retracted to facilitate normal vehicle movement.

[0035] The folding bracket of the device can also be flipped inward to overlap above the long crossbar, so that the electromagnetic generators and electromagnetic generating plates on the left and right sides are retracted within the vehicle frame, making the left and right sides narrower, which is convenient for vehicle driving. When operation is required, the electromagnetic generating plates on the left and right sides are unfolded outward to cover the entire lane, ensuring that a single lane can be electromagnetically heated for repair, so as to achieve the purpose of convenient switching between the driving and working states without affecting the normal driving of the vehicle.

[0036] 3. A controller, height sensor, temperature sensor and height control hydraulic cylinder have also been added. The ground height and temperature information can be sent to the controller in real time through the sensor. The controller adjusts the height of the electromagnetic generating plate according to the actual road conditions, thereby changing the heating effect on the road surface, so that the road surface is always kept within the appropriate repair temperature range. The electromagnetic generating plate can also monitor the obstacles on the road ahead and adjust the height of the electromagnetic generating plate in time through the height control hydraulic cylinder to avoid collisions. It is highly intelligent and easy to use, and road repair is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0038] Figure 1 Schematic diagram of the overall structure of the rear end of the vehicle of the present invention;

[0039] Figure 2 This is a schematic diagram of the left side structure of the vehicle of the present invention;

[0040] Figure 3 Schematic diagram of the connection structure of each hydraulic cylinder below the fixing frame of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of the electromagnetic generating plate of the present invention;

[0042] Figure 5 This is a schematic structural diagram of a single electromagnetic generating plate and an electromagnetic generator of the present invention;

[0043] Figure 6 This is a schematic diagram of the coordination structure of the flip seat and the folding hydraulic cylinder of the present invention;

[0044] Figure 7 This is a schematic diagram of the electromagnetic coil structure inside the electromagnetic generating plate of the present invention.

[0045] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0046] 1-Vehicle, 11-Controller, 12-Hydraulic Drive, 2-Folding Bracket, 21-Folding Hydraulic Cylinder, 22-Turning Seat, 23-Long Crossbar, 3-Electromagnetic Generator Plate, 31-Height Sensor, 32-Temperature Sensor, 33-Electromagnetic Generator, 34-Isolation Shell, 35-Electromagnetic Coil, 4-Fixed Bracket, 41-Retractable Hydraulic Cylinder, 42-Slave Support Rod, 43-Retractable Crank, 5-Adjusting Bracket, 51-Height Control Hydraulic Cylinder. DETAILED DESCRIPTION

[0047] See also Figures 1 to 7 As shown, the present invention provides an electromagnetic heating maintenance vehicle for asphalt pavement. In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] In a specific embodiment of the technical solution of the present invention:

[0049] It includes a vehicle 1, a folding bracket 2, an electromagnetic generating plate 3, a fixing bracket 4 and an adjusting bracket 5;

[0050] The vehicle 1 is equipped with a controller 11 and a hydraulic actuator 12;

[0051] The fixing frame 4 is a frame structure, and the fixing frame 4 is fixedly arranged at the rear of the vehicle 1;

[0052] A retractable crank 43 is provided below the left and right sides of the fixing frame 4. Each retractable crank 43 is rotatably connected to a retractable hydraulic cylinder 41 and a supporting rod 42 via a rotating shaft. The upper ends of the retractable hydraulic cylinder 41 and the supporting rod 42 are rotatably connected to the fixing frame 4 via a hinge support.

[0053] The lower end of the retractable crank 43 is fixedly mounted with a long cross bar 23, which is horizontally arranged at the rear of the vehicle 1 in the left-right direction. The long cross bar 23 is arranged below the fixing frame 4 in a manner of being retracted or expanded in the front-back direction by the retractable crank 43;

[0054] The supporting rod 42 is shortened and the retractable hydraulic cylinder 41 is extended. At this time, the retractable crank 43 is rotated to adjust and fold the long cross bar 23 just below the fixed frame 4. Figure 2 As shown;

[0055] On the contrary, the support rod 42 is extended and the retractable hydraulic cylinder 41 is shortened. At this time, the retractable crank 43 rotates along with the length change of the two hydraulic cylinders, so that the long crossbar 23 rotates and extends behind the fixed frame 4. Figure 1 As shown;

[0056] The width of the fixing frame 4 in the left-right direction is less than 2.7 m, and the length of the long cross bar 23 in the left-right direction is less than the width of the fixing frame 4, ensuring that the length of the fixing frame 4 and the long cross bar 23 do not hinder the normal driving of the vehicle 1. The folding bracket 2 will fold inward and retract within the width of the vehicle body, allowing the vehicle 1 to drive normally on a normal asphalt-paved road.

[0057] The total length of the long crossbar 23 and the two folding brackets 2 ranges from 3.2 meters to 3.8 meters, generally reaching the width of a single road, and the total length must leave a 1-meter margin. When the vehicle 1 encounters a curved road during operation, or the vehicle 1 is operating on a wider road, the driver turns or the driving route deviates from the road, which will cause the vehicle 1's driving trajectory to deviate from the road rotation. The long crossbar 23 of this device and the two folding brackets 2 have a margin, and the electromagnetic generating plate 3 of this device is fully distributed in the left and right directions. The total length of the long crossbar 23 and the two folding brackets 2 ensures that the electromagnetic generating plate 3 covers a single lane of the road surface completely, and the repair effect is good. The electromagnetic generating plate 3 is a rectangular electromagnetic ring. Adjacent electromagnetic generating plates 3 do not touch each other, and the gap between adjacent electromagnetic generating plates 3 on the left and right does not exceed 1 cm. Avoid the situation where the spacing between the electromagnetic generating plates 3 is too large to cause uneven heating.

[0058] The folding bracket 2 is a straight rod, and a folding bracket 2 extends from the outer ends of the left and right sides of the long crossbar 23. Each folding bracket 2 is flipped and folded above the long crossbar 23 through a flip seat 22;

[0059] A folding hydraulic cylinder 21 is further provided between the folding bracket 2 and the long cross bar 23. The telescopic end of the folding hydraulic cylinder 21 is connected to the folding bracket 2, and the fixed end of the folding hydraulic cylinder 21 is fixed to the long cross bar 23.

[0060] The turning seat 22 is a hinged support with an open top and a closed bottom, forming a restricted U-shaped groove structure, and the folding bracket 2 and the long cross bar 23 are both rotatably connected to the turning seat 22 by a rotating shaft, and the turning seat 22 has only left and right openings to form a restricted groove, so that the folding bracket 2 and the long cross bar 23 can only be turned left and right inside the turning seat 22, and the long cross bar 23 is fixedly installed between the left and right retracting cranks 43, so that the long cross bar 23 cannot be turned, and the long cross bar 23 can only swing forward and backward following the retracting crank 43. In this way, the left and right folding brackets 2 can only be turned inward along the turning seat 22 and folded on the top of the long cross bar 23 under the drive of the folding hydraulic cylinder 21, and then the electromagnetic generator 33 on the folding bracket 2 and the electromagnetic generating plate 3 connected thereto are turned and folded together on the top of the inner electromagnetic generator 33, forming a folding effect. When the vehicle is not in operation and needs to be driven normally, it can be folded for rapid travel.

[0061] The folding bracket 2 is driven by the folding hydraulic cylinder 21 to flip inward 180 degrees and fold above the long crossbar 23, that is, the two outer electromagnetic generating plates 3 are folded on top of the two inner electromagnetic generating plates 3, making the vehicle 1 narrower as a whole;

[0062] When the folding bracket 2 is turned outward 180 degrees and extends outward from the outer end of the long cross bar 23, the two folding brackets 2 and the long cross bar 23 form a longer straight rod;

[0063] When the folding brackets 2 are flipped inward and retracted above the long crossbar 23, the two folding brackets 2 and the long crossbar 23 form a double-layer long bar stacked up and down, and at this time the folding brackets 2 and the long crossbar 23 overlap on the same vertical plane.

[0064] Multiple height-control hydraulic cylinders 51 are vertically mounted on the long crossbar 23 and the folding bracket 2. An adjustment bracket 5 is horizontally mounted on the telescopic end of each height-control hydraulic cylinder 51. The adjustment bracket 5 is a V-shaped bracket, and the two ends of the adjustment bracket 5 are respectively locked to the left and right sides of the same electromagnetic generator 33.

[0065] The fixed end of the height control hydraulic cylinder 51 is locked with the long cross bar 23 or the folding bracket 2;

[0066] The height-control hydraulic cylinder 51 needs to be strong enough, and the structural strength of the adjustment frame 5 must also be strong enough to support and suspend the electromagnetic generator 33 and enable it to be lifted and lowered stably.

[0067] An electromagnetic generator 33 is horizontally mounted on each adjustment frame 5; multiple electromagnetic generators 33 are respectively mounted on the long crossbar 23 and the folding bracket 2 so as to be able to be raised and lowered by a height-control hydraulic cylinder 51. That is, multiple height-control hydraulic cylinders 51 are mounted on the long crossbar 23 and the folding bracket 2. Each adjustment frame 5 is mounted on the long crossbar 23 or the folding bracket 2 via the height-control hydraulic cylinder 51, and the electromagnetic generator 33 extends from the rear end of the long crossbar 23 and the folding bracket 2; the electromagnetic generator 33 is also raised and lowered by the adjustment frame 5 and the height-control hydraulic cylinder 51.

[0068] An electromagnetic generating plate 3 is horizontally arranged at the rear end of each electromagnetic generator 33, and the bottom of the electromagnetic generator 33 and the bottom of the electromagnetic generating plate 3 are on the same plane;

[0069] A height sensor 31 and a temperature sensor 32 are provided at the bottom of each electromagnetic generator 33;

[0070] The height sensor 31 and the temperature sensor 32 are arranged at the front end of the electromagnetic generating plate 3;

[0071] A height sensor 31 and a temperature sensor 32 are respectively provided on the left and right sides of the bottom of each electromagnetic generator 33. The height sensor 31 can be a laser rangefinder, which is convenient for timely detection of stones, bumps, potholes, etc. on the road surface, so as to fine-tune and adjust the height of each electromagnetic generator 33 and the electromagnetic generating plate 3 connected to its rear side, so as to achieve the effect of fine-tuning the road surface repair; the temperature sensor 32 can be an infrared temperature sensor.

[0072] The height sensor 31 is set at the front end of the temperature sensor 32 to ensure that the height position is detected first. Once a large protrusion or stone is detected, the entire adjustment frame 5 is immediately raised through the height control hydraulic cylinder 51, so that the entire electromagnetic generator 33 is raised, and each electromagnetic generator 33 is individually controlled by a height control hydraulic cylinder 51, so that other electromagnetic generators 33 in operation are not affected.

[0073] The electromagnetic generator plate 3 consists of an isolation shell 34 and an electromagnetic coil 35. The isolation shell 34 is a hollow shell with an open bottom, shaped like the electromagnetic coil 35, forming a tubular housing. The electromagnetic coil 35 is embedded within the isolation shell 34, with the coil 35 exposed at the bottom to electromagnetically heat the ground. The electromagnetic coil 35 is a copper tube with a cooling medium injected into the sealed interior. This controls the temperature of the electromagnetic coil 35, ensuring it remains below 30°C. Vehicle 1 is also equipped with a water-cooled radiator to dissipate heat and cool the electromagnetic coil 35. The rear end of the electromagnetic coil 35 is connected to the water-cooled radiator. The cooling medium within the electromagnetic coil 35 flows between the water-cooled radiator and the electromagnetic generator plate 3, cooling the electromagnetic coil 35 and ensuring its temperature remains below 30°C. This type of heat dissipation device is commonly used, but is installed on vehicle 1 to cool and regulate the electromagnetic coil 35. In this device, the electromagnetic coil 35 utilizes its electromagnetic properties solely to heat the road surface.

[0074] The isolation shell 34 is included outside the electromagnetic coil 35, and the bottom of the electromagnetic coil 35 is unobstructed facing the road surface; the isolation shell 34 is a magnetic shell with an open bottom. When working, the magnetic flux lines of the electromagnetic coil 35 are constrained to be emitted directly towards the ground, and the isolation shell 34 can isolate the magnetic field in the top and front and back directions, so that the electromagnetic field does not act in other directions, but only acts on the ground, reducing the environmental dissipation of the magnetic field, enhancing the heating effect on the road surface, and not affecting the surrounding environment.

[0075] Each electromagnetic generator 33, height sensor 31 and temperature sensor 32 are data-connected to the controller 11, and each retractable hydraulic cylinder 41, subordinate support rod 42, folding hydraulic cylinder 21 and height control hydraulic cylinder 51 are controlled by the hydraulic driver 12;

[0076] The hydraulic driver 12 is connected and controlled via a controller 11 . The controller 11 is a commonly used controller on such engineering vehicles, and a similar vehicle-mounted controller currently available can be used.

[0077] However, this device requires that each hydraulic cylinder be controlled individually, especially those similar to asphalt repair equipment. The controller 11 is already a conventional device.

[0078] It should be noted that:

[0079] 1. Nowadays, sprinkler trucks or road cleaning trucks are generally wide and need to achieve the effect of complete coverage of a single lane. In addition, they need to extend out of the occupied lane, leaving a margin to ensure complete coverage of the lane. This device also needs to completely cover the lane where the vehicle 1 is located. However, the folding bracket 2 of this device can flip and retract the electromagnetic generating plates 3 on both sides that cover the road margin when the vehicle is in normal driving and not in operation, so that the overall width of the vehicle is narrowed to within the width range of 2.7 meters of a normal small truck. The total width of the vehicle 1 after folding designed by this device is 2.5 meters, so that this device is suitable for small trucks used on conventional roads, and does not need to occupy other lanes for driving, so that the vehicle 1 can quickly reach the designated location for construction work;

[0080] 2. Existing repair vehicles are generally a small truck towing a fixed power, and its heating capacity is also basically fixed, but it can also be adjusted. This electronic power adjustment can be completed instantly, but the temperature condition requires a certain buffer time, especially for infrared radiation or heating with electric heating wire. The temperature of the heating wire is already very high, and cooling can only wait for it to dissipate heat on its own. During this waiting process, the vehicle is still repairing the road surface, which will cause the road surface heating temperature to be too high, resulting in excessive melting of the asphalt, and the asphalt will form a complete fluid, which will cause the road surface to melt and collapse. This device does not need to wait, and can immediately carry the electromagnetic generating plate 3 up through the height control hydraulic cylinder 51 to reduce the heating capacity of the ground and the intensity of electromagnetic radiation, and immediately achieve the purpose of reducing the heating temperature of the road surface. Conversely, when the monitored road surface temperature is low, the electromagnetic generating plate 3 is controlled to lower and fit the road surface, so that the temperature of this device is detected and fed back in real time, and the height is adjusted in time through the height control hydraulic cylinder 51, which can effectively control the heating temperature to always remain within the optimal healing temperature range.

[0081] 3. Current asphalt pavement heating vehicles are all fixed in size and have a fixed ground clearance. However, these devices have limited adaptability, especially given the diverse road conditions in my country: wide and smooth highways, medium-width urban roads, and narrower, lower-load-bearing rural roads. These roads are driven by completely different vehicles, have different load-bearing designs, and exhibit varying damage profiles. The folding brackets 2 on the left and right sides of the device each have two electromagnetic generating plates 3 and two electromagnetic generators 33, and the long crossbar 23 has four electromagnetic generating plates 3 and four electromagnetic generators 33. When high-speed driving or working on narrow rural roads is required, the folding brackets 2 on the left and right sides of the device can carry the electromagnetic generators 33 and electromagnetic generating plates 3 thereon and flip and fold inward, so that only the four electromagnetic generating plates 3 on the inner long crossbar 23 are opened and used separately, which is convenient for repairing narrow roads. The device can perform penetrating heating repair. This design of the device can adapt to various road widths, making it more flexible and adaptable in road use. In addition, the entire long crossbar 23 can also be adjusted by the telescopic adjustment of the retractable hydraulic cylinder 41 and the auxiliary support rod 42, so that the retractable crank 43 is rotated and raised, thereby raising the entire long crossbar 23 and the folding brackets 2 thereon together, thereby moving all the electromagnetic generating plates 3 and electromagnetic generators 33 away from the road surface, entering the high-speed driving mode, allowing the vehicle 1 to reach a normal driving speed, and then quickly transfer to the destination.

[0082] 4. This device performs micro-repairs in advance to avoid the premature occurrence of macro-road problems (such as potholes) due to the long-term failure to resolve small micro-problems. Timely repair of such micro-defects inside the road surface can avoid or delay the occurrence of macro-defects such as cracking, threshing, and potholes. By reducing the activation energy of asphalt flow, cracks can be repaired in the budding stage, significantly extending the life of the road surface. Electromagnetic heating can repair early-stage road surface defects such as microcracks caused by environmental effects or cyclic loads.

[0083] 5. This device heats the top layer of an asphalt pavement mixed with a conductive medium. The conductive medium is a metallic material such as steel wool or steel grit. Currently, some asphalt pavement paving materials incorporate metallic fibers to enhance the pavement's toughness and bearing strength. This device targets these metallic materials through electromagnetic interaction. The conductive medium generates Joule heating in an alternating magnetic field. This heat, through conduction or diffusion, raises the temperature of the surrounding asphalt to above the asphalt's softening point. This accelerates the infiltration, diffusion, and chain reorganization of asphalt molecules on both sides of microcracks, ultimately closing the microcracks in their incipient stages. This device heats the pavement without generating macroscopic flows or affecting the pavement's macrostructure.

[0084] When the vehicle 1 is operating, there are two modes, including a driving mode and a working mode.

[0085] Vehicle 1 normal driving mode:

[0086] The controller 11 controls the hydraulic driver 12 to extend the retractable hydraulic cylinder 41 and shorten the auxiliary support rod 42, so that the auxiliary support rod 42 is vertically suspended directly below the fixed frame 4, and the retractable hydraulic cylinder 41 extends forward, pushing the retractable crank 43 toward the front of the vehicle.

[0087] At the same time, the hydraulic driver 12 drives the folding hydraulic cylinder 21 to shorten, and the left and right folding brackets 2 are folded along the flip seat 22 to the top of the long crossbar 23, thereby flipping and folding the left and right outer electromagnetic generating plates 3 and the electromagnetic generator 33 to the inside;

[0088] In this state, Figure 2 As shown, the equipment on the rear side of the vehicle 1 is narrowed and retracted and raised, so as to facilitate the normal driving of the vehicle 1 on the road.

[0089] Vehicle 1 working mode:

[0090] The controller 11 controls the hydraulic driver 12 to shorten the retractable hydraulic cylinder 41 and extend the lateral support rod 42, so that the lateral support rod 42 tilts and extends toward the rear side of the fixed frame 4. The retractable hydraulic cylinder 41 also swings backward to a certain extent, and the retractable crank 43 extends the long cross bar 23 backward to the rear of the fixed frame 4. Figure 2 Status shown;

[0091] After the long crossbar 23 is extended, the folding hydraulic cylinder 21 is controlled to extend outward, and the left and right folding brackets 2 are flipped outward along the flip seat 22, so that the left and right folding brackets 2 are flipped and unfolded 180 degrees to the left and right sides, so that the two folding brackets 2 are extended to the left and right sides outside the vehicle 1, forming a complete coverage of the road surface;

[0092] Vehicle 1 performs heating operation on the asphalt road surface:

[0093] The controller 11 controls the circuit of the electromagnetic generator 33 to start, so that the electromagnetic generating plate 3 starts to generate an alternating magnetic field and starts to heat the road surface;

[0094] At the same time, the height sensor 31 and the temperature sensor 32 at the bottom of the electromagnetic generator 33 also start working synchronously.

[0095] The height sensor 31 detects the height of the road surface in front of the vehicle 1, thereby obtaining the height gap between the electromagnetic generating plate 3 and the road surface. The temperature sensor 32 is closer to the electromagnetic generating plate 3, which is convenient for temperature monitoring of the road surface in the heated area. The controller 11 adjusts the heating power of the electromagnetic generating plate 3 to ensure that the road surface is heated to an appropriate temperature. When the temperature is found to be too high, or when the height sensor 31 detects an obstacle in front, the height control hydraulic cylinder 51 can be urgently controlled to rise, thereby lifting the entire electromagnetic generator 33 and the electromagnetic generating plate 3 connected at the rear through the adjustment frame 5, so as to achieve the purpose of emergency obstacle avoidance and rapid reduction of the road surface heating effect, and effectively avoid the road surface melting due to excessive temperature.

[0096] When it is necessary to adjust the heating temperature of the road surface by the electromagnetic generating plate 3 later, the generated power can be adjusted through the controller 11 .

[0097] This device has a total of 8 electromagnetic generating plates 3, which are laid out in a row along the left and right directions at the rear of the vehicle, thereby covering the entire lane horizontally. The vehicle 1 moves slowly, and the speed of the vehicle 1 and the heating power of the electromagnetic generating plates 3 can be adjusted accordingly. The faster the speed, the greater the power, and the slower the vehicle speed, the power of the electromagnetic generating plates 3 can be appropriately reduced.

[0098] The parameter adjustment is based on ensuring the heating effect and ensuring the heating and repair effect of the asphalt pavement. The matching data of the optimal ground clearance, power and driving speed of the electromagnetic generating plate 3 and the vehicle 1 need to be based on the thickness of the pavement, as well as the type and content of asphalt, conductive media, etc. on the specific road. During actual construction operations, the height and temperature setting parameters also need to be adjusted to achieve the best operating state.

[0099] The electromagnetic generating plates 3 of this device can also be used to repair narrow roads. During operation, the four electromagnetic generating plates 3 on the long cross bar 23 are extended and opened, and the external electromagnetic generating plates 3 on the left and right sides are folded and retracted through the folding hydraulic cylinder 21, and then the narrow asphalt road surface is heated and repaired.

[0100] The device is flexible in operation. The electromagnetic coil 35 is less destructive to surrounding personnel and organisms. Furthermore, a cooling medium is contained within the electromagnetic coil 35 to control its temperature at approximately 30 degrees Celsius. The entire electromagnetic coil 35 is cooled by a vehicle-mounted water-cooled radiator. Specifically, the electromagnetic coil 35 is a closed conduit, and the medium within the electromagnetic coil 35 is pumped into the water-cooled radiator. Heat is dissipated through a shell-and-tube system, achieving rapid cooling. This type of cooling device is also conventional, except that the present device is used to cool the electromagnetic coil 35.

[0101] At the same time, the electromagnetic coil 35 is wrapped with an isolation shell 34, which can converge the magnetic flux lines of the electromagnetic coil 35 within a certain range during operation, so that the electromagnetic coil 35 only heats the road surface downward.

[0102] The electromagnetic generating plate 3 is an electromagnetic coil, and the electromagnetic generator 33 is its generating and control device. A single electromagnetic generator 33 is a powerful inductor with a power of 30kW. This device uses eight electromagnetic generators 33, with a total power of 240kW and an oscillation frequency controlled at 170kHz. This allows for precise heating with a depth of ≥4cm and a heating rate of ≥3.0°C / s. After heating, the pavement crack healing rate is ≥80% and strength recovery is ≥70%. A 20kW forced-circulation water cooling system is also included. The maintenance vehicle utilizes a hydraulically driven folding mechanism to achieve an adjustable heating width of 3.25-3.75m (the width collapses to 2.5m when not in operation).

[0103] The sensor parameters are selected as follows: the height sensor 31 uses a laser radar (accuracy ±1 mm) to sense the ground clearance in real time, and the temperature sensor 32 feedback (accuracy ±0.5°C) is combined with the infrared thermal imaging temperature to be regulated by the system.

[0104] The electromagnetic coil 35 is a hollow copper tube coil with an outer diameter of 10mm and a U-shaped manganese-zinc ferrite core, with an energy conversion efficiency of ≥85%. Through the isolation shell 34, the magnetic circuit directional convergence technology reduces magnetic energy dissipation by more than 30%.

[0105] The front, back, left, and right of this device are based on the direction of the vehicle 1, the inside and outside are centered on the central axis of the vehicle in the front and rear direction, and the left and right sides are the outsides. These directional descriptions are for the convenience of describing the directional words used, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and do not serve as a limitation on the technical solution.

[0106] Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An electromagnetic heating maintenance vehicle for asphalt pavement, characterized in that: include: Vehicle (1), folding bracket (2), electromagnetic generating plate (3), fixing bracket (4) and adjusting bracket (5); The vehicle (1) is equipped with a controller (11) and a hydraulic driver (12); The fixing frame (4) is a frame structure, and the fixing frame (4) is fixedly arranged at the rear of the vehicle (1); A retractable crank (43) is provided below the left and right sides of the fixed frame (4), and each retractable crank (43) is rotatably connected to a retractable hydraulic cylinder (41) and a lateral support rod (42) via a rotating shaft. The upper ends of the retractable hydraulic cylinder (41) and the lateral support rod (42) are rotatably connected to the fixed frame (4) via a hinge support. A long cross bar (23) is fixedly mounted on the lower end of the retractable crank (43), and the long cross bar (23) is horizontally arranged at the rear of the vehicle (1) in the left-right direction. The long cross bar (23) is arranged below the fixing frame (4) in a manner of being retracted or expanded in the front-back direction through the retractable crank (43); The folding bracket (2) is a straight rod, and a folding bracket (2) extends from each of the left and right outer ends of the long cross bar (23). Each folding bracket (2) is flipped and folded above the long cross bar (23) via a flip seat (22); A plurality of height-controlling hydraulic cylinders (51) are vertically arranged on the long crossbar (23) and the folding bracket (2), and an adjustment frame (5) is horizontally installed at the telescopic end of each height-controlling hydraulic cylinder (51); An electromagnetic generator (33) is horizontally mounted on each of the adjustment frames (5); a plurality of the electromagnetic generators (33) are respectively mounted on the long cross bar (23) and the folding bracket (2) via the height control hydraulic cylinder (51) so as to be liftable, and the electromagnetic generators (33) extend out from the rear ends of the long cross bar (23) and the folding bracket (2); An electromagnetic generating plate (3) is horizontally arranged at the rear end of each electromagnetic generator (33), and the bottom of the electromagnetic generator (33) and the bottom of the electromagnetic generating plate (3) are on the same plane; A height sensor (31) and a temperature sensor (32) are provided at the bottom of each electromagnetic generator (33); Each of the electromagnetic generators (33), the height sensor (31), and the temperature sensor (32) is data-connected to the controller (11), and each of the retractable hydraulic cylinder (41), the subordinate support rod (42), and the height-control hydraulic cylinder (51) is controlled by the hydraulic driver (12); The hydraulic drive (12) is connected and controlled via the controller (11).

2. The electromagnetic heating maintenance vehicle for asphalt pavement according to claim 1, characterized in that: A folding hydraulic cylinder (21) is provided between the folding bracket (2) and the long cross bar (23), the telescopic end of the folding hydraulic cylinder (21) is connected to the folding bracket (2), and the fixed end of the folding hydraulic cylinder (21) is fixed to the long cross bar (23); The turning seat (22) is a hinged support.

3. The electromagnetic heating maintenance vehicle for asphalt pavement according to claim 1, characterized in that: The height sensor (31) and the temperature sensor (32) are arranged at the front end of the electromagnetic generating plate (3); A height sensor (31) and a temperature sensor (32) are respectively provided on the left and right sides of the bottom of each electromagnetic generator (33); The height sensor (31) is arranged at the front end of the temperature sensor (32); The electromagnetic generating plate (3) is composed of an isolation shell (34) and an electromagnetic coil (35). The isolation shell (34) is a hollow shell with an open bottom. The electromagnetic coil (35) is a copper tube. The isolation shell (34) is wrapped around the outside of the electromagnetic coil (35), and the bottom of the electromagnetic coil (35) is unobstructed and faces the road surface.

4. The electromagnetic heating maintenance vehicle for asphalt pavement according to claim 1, characterized in that: The electromagnetic generating plates (3) are rectangular electromagnetic coils, adjacent electromagnetic generating plates (3) do not contact each other, and the gap between adjacent electromagnetic generating plates (3) on the left and right does not exceed 1 cm.

5. The electromagnetic heating maintenance vehicle for asphalt pavement according to claim 1, characterized in that: The width of the fixing frame (4) in the left-right direction is less than 2.7 m; The left-right length of the long crossbar (23) is smaller than the width of the fixing frame (4); The total length of the long crossbar (23) and the two folding brackets (2) ranges from 3.2m to 3.8m.

6. The electromagnetic heating maintenance vehicle for asphalt pavement according to claim 1, characterized in that: The adjustment frame (5) is a V-shaped frame, and both ends of the adjustment frame (5) are respectively locked with the left and right sides of the same electromagnetic generator (33); The fixed end of the height-control hydraulic cylinder (51) is locked with the long crossbar (23) or the folding bracket (2).

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