A road marking removal device based on microwave heating and its working method

Abstract

The present invention relates to the technical field of road markings, and discloses a road marking removal device based on microwave heating and a working method thereof. The device comprises a mobile body; a microwave heating unit, which is arranged at the bottom of the mobile body and is used to generate microwaves to the surface of the road body; an image acquisition unit, which is arranged at the front end of the bottom of the mobile body and is used to collect image information of the road surface; a main control module, which is arranged in the mobile body, and its signal input end is connected to the image acquisition unit, and its signal output end is connected to the mobile body and the microwave heating unit. The device of the present invention uses microwaves generated by a microwave heater to pass through the surface of the marking, and electromagnetic losses are generated in the bonding layer due to resonance or polarization, thereby generating a large amount of heat and transferring it to the asphalt mixture, thereby weakening the adhesion effect between the marking and the asphalt mixture, thereby achieving microwave dissociation of the road marking, and greatly reducing the difficulty of removing the road marking.

Description

Technical Field

[0001] The invention relates to a road marking removal technology, in particular to a road marking removal device and method based on microwave heating, belonging to the field of road surface maintenance. Background Art

[0002] The development of transportation infrastructure plays a vital role in the smooth and healthy operation of highway systems and urban road systems. Traffic markings, as transportation infrastructure that adheres to the road surface and has functions such as indication and guidance, play an irreplaceable role in providing continuous information flow, reasonably dividing lane boundaries, and ensuring smooth and safe driving of vehicles. The premise for traffic markings to maximize their safety benefits is that they are clear, recognizable and unambiguous.

[0003] With the continuous expansion of the scale of highway and urban road reconstruction and expansion, the original lane boundaries need to be redrawn, and the original markings will wear out under the driving load and natural environmental factors, shortening the normal service life of the markings. All these put forward higher requirements for the removal and alteration performance of traffic markings. Incompletely removed traffic markings will not only cause visual residue on the original road surface and affect the appearance of the road surface, but also the mixing of new and old markings is very easy to cause ambiguity, induce drivers to make wrong judgments, and then cause a series of traffic accidents.

[0004] At present, there are two main methods for external processing of old traffic markings, namely, the alteration method and the removal method.

[0005] The overpainting method refers to the use of black paint to cover the surface of traffic markings to cover up old markings. This design concept originally originated from the standard for repainting road markings issued by the United Kingdom in 2000. The standard proposes the use of a black substance to overpaint existing road markings, which can be hot-melt road marking paint, liquid paint, tape or other types of materials. From the perspective of performance, the standard makes requirements on the brightness factor, color, skid resistance, mirror gloss and other performance of the black overpaint material, but does not make corresponding requirements on specific materials and construction methods, so it has strong flexibility. Although the repainted coating can meet the performance requirements within a certain period of time, the traffic load and natural factors will cause the coating to wear, and then the original markings will be exposed, causing a series of problems. Using the overpainting method instead of the removal method is not a long-term solution.

[0006] The removal method can be divided into sandblasting, shot blasting, high-pressure water jet method, etc. Among them, the representative products of road marking cleaning equipment based on sandblasting and shot blasting are the old road marking removal machine developed by Du Jinping and others and the road marking removal equipment disclosed by Chen Jinglin and others. Although the mechanical grinding road marking removal method has a high removal efficiency, it will inevitably damage the texture and anti-skid performance of the original road surface, and a large amount of dust and noise will be generated during the removal process, thereby polluting the surrounding environment. The high-pressure water jet method uses a booster system to output a high-pressure water jet to remove the stripping line. Although this method is easy to clean and efficient, it requires specific instruments and equipment, has high requirements for water resources on the construction site, and the water flow under high pressure will cause certain damage to the asphalt film on the asphalt road surface, resulting in the shedding of the surface asphalt film.

[0007] From this, it can be seen that there are many types of existing road marking removal technologies, but most of them remove road markings by destroying the cohesion of the road markings or the adhesion between the road markings and the road surface. Although they have a certain removal effect, they cannot avoid problems such as high energy consumption, low efficiency, and high pollution, and they will cause varying degrees of damage to the original road surface. Summary of the invention

[0008] Purpose of the invention:

[0009] In order to solve the above-mentioned problems, the present invention provides a road marking removal device and working method based on the principle of microwave heating. Microwave heating utilizes the absorption and loss effect of polar absorbing materials on microwaves under an external electromagnetic field, thereby converting electromagnetic energy into thermal energy. The microscopic effect of this effect is manifested as the conversion of the electromagnetic energy of the microwave into energy within the dielectric material, while the macroscopic effect is manifested as an increase in the temperature of the heated object. The microwaves generated in the microwave heater pass through the surface of the marking, and electromagnetic losses are generated in the bonding layer due to resonance or polarization, thereby generating a large amount of heat and transferring it to the asphalt mixture. As the asphalt reaches the softening point, its thermoplasticity increases and a certain flow deformation occurs, thereby weakening the adhesion effect between the marking and the asphalt mixture, thereby achieving microwave dissociation of the road marking, greatly reducing the difficulty of removing the road marking.

[0010] In order to achieve the above technical objectives, the present invention is implemented by the following technical solutions:

[0011] A road marking removal device based on microwave heating, comprising:

[0012] Moving the vehicle body;

[0013] A microwave heating unit is arranged at the bottom of the moving vehicle body and is used to generate microwaves toward the surface of the road body;

[0014] An image acquisition unit is arranged at the front end of the bottom of the mobile vehicle body and is used to acquire image information of the road surface;

[0015] The main control module is arranged in the mobile vehicle body, and its signal input end is connected with the image acquisition unit, and its signal output end is connected with the mobile vehicle body and the microwave heating unit.

[0016] A front limit baffle and a rear limit baffle are fixedly connected to the bottom of the mobile body, and a limit space is formed between the front limit baffle and the rear limit baffle;

[0017] The microwave heating unit comprises a microwave heating vehicle, a microwave tube, a rectangular waveguide and an antenna chamber, wherein:

[0018] The microwave tube is arranged on one side of the microwave heating vehicle, and the microwave generated by the microwave tube is transmitted to the antenna room located inside the microwave heating vehicle through the rectangular waveguide. A cross-shaped antenna is arranged in the antenna room, and a micro-slit metal plate with a plurality of half-wavelength resonant micro-slits is arranged below the cross-shaped antenna. After being diffused by the micro-slit metal plate, the microwave can be uniformly radiated to the road surface under the microwave heating vehicle.

[0019] A spring is connected between the top of the microwave heating vehicle and the bottom of the moving vehicle body.

[0020] An exhaust gas purification device is installed at the rear end of the mobile vehicle body, and the exhaust gas purification device includes:

[0021] The machine body is fixedly connected to the rear end of the mobile vehicle body, and a gas channel is arranged in the machine body. A grid, an activated carbon adsorption layer, an organic solvent filter layer and an air compressor are arranged in the gas channel along the gas flow direction.

[0022] The mobile vehicle body is provided with a diesel engine and a generator, wherein the diesel engine is used to drive the mobile vehicle body; and the electricity generated by the generator is used to supply power to the microwave heating unit, the image acquisition unit, the air compressor and the main control module.

[0023] The image acquisition unit is a camera.

[0024] A working method based on the road marking removal device based on microwave heating comprises the following steps:

[0025] S1, the image acquisition unit acquires the road surface image and transmits the image information to the main control module, and the main control module sends a control signal to control the mobile vehicle to pull the mobile vehicle to the marking to be cleared;

[0026] S2, starting the microwave heating unit to heat the asphalt mixture under the marking line using microwaves, thereby reducing the adhesion between the marking line and the mixture;

[0027] S3. As the moving vehicle gradually moves forward, the markings separated by heating are removed and recovered by mechanical means at the rear of the vehicle.

[0028] Beneficial effects:

[0029] First, the separation of road markings and asphalt mixtures by using the principle of microwave heating has the advantages of good cleaning effect and no wear and tear compared with traditional alteration methods; compared with sandblasting, high-pressure water jet and other removal methods, microwave heating has the advantages of high cleaning efficiency, no pollution to the environment, and no damage to the original road surface.

[0030] Second, the exhaust gas in the cleaning process is filtered and adsorbed through the exhaust gas purification device to achieve low harm and low pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a side view of the marking removal device of the present invention.

[0032] Figure 2 It is a front view of the marking removal device of the present invention.

[0033] Figure 3 It is a side view of the microwave heating vehicle of the present invention.

[0034] Figure 4 This is a top view of the microwave heating vehicle of the present invention.

[0035] Figure 5 The present invention is a schematic diagram of the guide rail structure connecting the microwave heating vehicle and the baffle.

[0036] Figure 6 It is a schematic diagram of the internal structure of the exhaust gas purification device of the present invention.

[0037] In the figure: 1. mobile body; 2. computer; 3. power source; 4. main wheel; 5. microwave heating vehicle; 6. camera; 7. auxiliary wheel; 8. front limit baffle; 9. rear limit baffle; 10. spring; 11. cross antenna; 12. rectangular waveguide; 13. microwave tube; 14. micro-slit; 15. micro-slit metal plate; 16. diesel engine; 17. generator; 18. guide rail; 19. exhaust gas purification device; 20. air inlet; 21. exhaust outlet; 22. compressor; 23. organic solvent filter layer; 24. activated carbon adsorption layer; 25. grille. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0039] Example 1

[0040] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, a road marking removal device based on microwave heating includes a mobile body 1, a computer 2 is installed on the front of the upper surface of the mobile body 1, and a power source 3 is installed on the rear of the mobile body 1, including a diesel engine 16 and a generator 17. Four main wheels 4 are installed on the lower part of the mobile body 1, which are connected to the power source 3 and driven by the diesel engine 16. A camera 6, a front limit baffle 8, a microwave heating vehicle 5 and a rear limit baffle 9 are arranged between two rows of main wheels, wherein the camera 6 is used to observe the road conditions in front of the microwave heating vehicle 5 to ensure that the microwaves generated by it are irradiated on the road markings. The front limit baffle 8 and the rear limit baffle 9 are provided with slide rails 18, as shown in FIG. Figure 5 As shown, it matches with the protrusions at the front and rear of the microwave heating vehicle 5 to ensure that the microwave heating vehicle 5 has no relative displacement relative to the moving vehicle body 1 except in the vertical direction.

[0041] The arrangement in the microwave heating vehicle 5 is as follows Figure 3 , Figure 4 As shown, a radiant microwave heating version of a near-field microwave oven is selected. The microwave generated by the microwave tube 13 is transmitted to the antenna room through a rectangular waveguide 12, in which a cross-shaped antenna 11 is arranged to achieve energy transmission. Below the cross-shaped antenna 11 is a metal plate 15 with a plurality of half-wavelength resonant micro-slits 14, and the micro-slits 14 are arranged in a rectangular staggered manner, as shown in FIG. Figure 4 As shown, after the microwaves are diffused through the micro-seam metal plate 15 , they can be uniformly radiated to the road surface under the microwave heating vehicle 5 .

[0042] Example 2

[0043] As a preferred embodiment of the technical solution of the present invention, the microwave heating vehicle 5 is connected to the mobile vehicle body 1 through a spring 9. The lower part of the microwave heating vehicle 5 is provided with an auxiliary wheel 7. The auxiliary wheel 7 cooperates with the spring 9, so that the microwave heating vehicle 5 can move up and down within a limit to adapt to a road surface with certain undulations, ensuring that the microwave heating vehicle 5 is always at an optimal working distance from the markings on the road surface.

[0044] Example 3

[0045] As another preferred embodiment of the technical solution of the present invention, the difference from Embodiment 1 and Embodiment 2 is that an exhaust gas purification device is further provided, and the internal structure of the exhaust gas purification device is as follows: Figure 6As shown, the exhaust gas purification device 19 is powered by a diesel engine 16 and a generator 17. The air compressor 22 on the top generates negative pressure inside, thereby sucking in harmful gases and fine particles generated by the vehicle when peeling off the road markings from the air inlet 20. The air inlet 20 is equipped with a grille 25 to prevent the inhalation of small stones and the like from affecting the purification effect. After entering, the pollution sources such as gas and dust pass through the activated carbon adsorption layer 24 and the organic solvent filter layer 23 in turn, thereby achieving purification and environmental protection effects. Finally, the harmless gas is blown out of the exhaust gas purification device 19 from the exhaust port 21 by the air compressor 22.

[0046] The present invention further discloses a working method of the microwave heating device based on the road marking removal, which mainly comprises the following steps:

[0047] (1) Under the guidance of the camera, pull the device to the front of the marking to be cleared;

[0048] (2) Start the microwave heating vehicle to use microwaves to heat the asphalt mixture under the marking line, thereby reducing the adhesion between the marking line and the mixture;

[0049] (3) As the vehicle moves forward, the markings separated by heat are removed and recovered mechanically at the rear of the vehicle.

Claims

1. A working method of a road marking removal device based on microwave heating, characterized in that: The device includes: Moving the vehicle body; A microwave heating unit is arranged at the bottom of the moving vehicle body and is used to generate microwaves toward the surface of the road body; An image acquisition unit is arranged at the front end of the bottom of the mobile vehicle body and is used to acquire image information of the road surface; A main control module is arranged in the mobile vehicle body, a signal input end of which is connected to the image acquisition unit, and a signal output end of which is connected to the mobile vehicle body and the microwave heating unit; An exhaust gas purification device is installed at the rear end of the mobile body, and the exhaust gas purification device includes: a body, which is fixedly connected to the rear end of the mobile body, and a gas channel is provided in the body, and a grid, an activated carbon adsorption layer, an organic solvent filter layer and an air compressor are arranged in sequence in the gas flow direction in the gas channel; Under the action of the air compressor, the polluted gas generated by microwave heating of the ground marking line is discharged after passing through the grid, the activated carbon adsorption layer, and the organic solvent filtration layer in sequence; The following steps are involved: S1, the image acquisition unit acquires the road surface image and transmits the image information to the main control module, and the main control module sends a control signal to control the mobile vehicle to pull the mobile vehicle to the marking to be cleared; S2, starting the microwave heating unit to heat the asphalt mixture under the marking line using microwaves, thereby reducing the adhesion between the marking line and the mixture; S3. As the moving vehicle gradually moves forward, the markings separated by heating are removed and recovered by mechanical means at the rear of the vehicle.

2. The working method of the road marking removal device based on microwave heating according to claim 1, characterized in that: A front limit baffle and a rear limit baffle are fixedly connected to the bottom of the mobile vehicle body, and a limit space is formed between the front limit baffle and the rear limit baffle; The microwave heating unit comprises a microwave heating vehicle, a microwave tube, a rectangular waveguide and an antenna chamber, wherein the bottom of the microwave heating vehicle is in contact with the ground through moving wheels, the microwave tube is arranged on one side of the microwave heating vehicle, the microwave generated by the microwave tube is transmitted to the antenna chamber located inside the microwave heating vehicle through the rectangular waveguide, a cross-shaped antenna is arranged in the antenna chamber, a micro-slit metal plate with a plurality of half-wavelength resonant micro-slits is arranged below the cross-shaped antenna, and the microwave can be evenly radiated to the road surface under the microwave heating vehicle after being diffused by the micro-slit metal plate.

3. The working method of the road marking removal device based on microwave heating according to claim 2 is characterized in that: A spring is connected between the top of the microwave heating vehicle and the bottom of the movable vehicle body. Under the elastic force of the spring, the movable wheels at the bottom of the microwave heating vehicle are arranged in close contact with the ground.

4. The working method of the road marking removal device based on microwave heating according to claim 1, characterized in that: The mobile vehicle body is provided with a diesel engine and a generator, wherein the diesel engine is used to drive the mobile vehicle body; and the electric energy generated by the generator is used to supply power to the microwave heating unit, the image acquisition unit, the air compressor and the main control module.

5. The working method of the road marking removal device based on microwave heating according to claim 1, characterized in that: The image acquisition unit is a camera.

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