Crack repairing equipment and method for traffic road maintenance

Abstract

The invention relates to crack repairing equipment for traffic road maintenance. The crack repairing equipment comprises a vehicle body, a cold air inlet pipe, an air nozzle, a necking section, a throat part, a flaring section, a hot air supply assembly, a controller, a telescopic device and a valve plate. High-temperature and low-speed hot air is provided for the venturi tube through the hot air supply assembly, the vehicle body moves from the starting end to the tail end of the crack, the controller controls the telescopic device to open the valve plate, when the hot air passes through the venturi tube, part of environmental cold air is sucked from the cold air inlet tube under the action of the venturi effect, the cold air and the hot air are mixed, and therefore the crack is formed. A stream of airflow with increased speed and reduced temperature is generated to blow away dust, then a vehicle body moves from the tail end to the starting end of the crack, a controller controls a telescopic device to close a valve plate, high-temperature and low-speed hot air directly passes through a Venturi tube, deep moisture can be efficiently evaporated through high temperature, the crack wall is preheated, the temperature difference between the crack and sealant is reduced, and the sealing performance of the crack is improved. The flowing and infiltration of the sealant are promoted, and the crack repairing quality is favorably improved.

Description

Technical Field

[0001] This invention relates to the field of road maintenance technology, and in particular to a crack repair device and method for highway maintenance. Background Technology

[0002] With the continuous increase in traffic volume and the aging of highways, cracks inevitably appear on highway surfaces. If these cracks are not addressed promptly, they will lead to a series of serious problems. First, cracks allow rainwater to seep into the road base, weakening its structural strength and causing more extensive road damage, such as potholes and subsidence. Second, the presence of cracks also affects driving comfort and safety; vehicles traveling on cracked surfaces will experience bumps, and cracks may trap tires or cause dangerous situations such as loss of vehicle control. Therefore, effective repair of highway cracks is a key task in highway maintenance, which is where crack repair equipment comes in.

[0003] In highway crack repair equipment, sealant injection relies on the material's own weight to flow. Dust and debris within the crack form an isolation layer, preventing the sealant from directly bonding to the crack wall. Simultaneously, moisture in the damp crack vaporizes instantly upon contact with the high-temperature sealant, forming closed air bubbles that disrupt the bond. These bubbles burst under subsequent vehicle loads, leading to localized settlement. Furthermore, when localized asphalt settlement results in height differences, secondary asphalt filling is required. Because the first filling is completely solidified, the new asphalt flows naturally under gravity, making it difficult to break through the sealed interface of the old asphalt, potentially causing delamination. Repeated vehicle loads can then cause secondary damage to the repaired area. Currently, the common method is to use a hot air gun to blow away dust particles and remove moisture from the crack before sealant injection. However, the high temperature of the hot air gun may "bake" dust onto the inner wall of the crack, resulting in incomplete dust removal and negatively impacting sealant injection, ultimately reducing the quality of the crack repair. Summary of the Invention

[0004] This invention provides a crack repair device and method for highway maintenance, which can solve the problem in the prior art where the high temperature of the hot air blower may "bake" the dust onto the inner wall of the crack when cleaning the crack, resulting in incomplete dust removal, negatively affecting the injection of sealant, and ultimately reducing the quality of crack repair.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a crack repair device and method for highway maintenance, wherein the crack repair device for highway maintenance in the present invention includes: Vehicle body; A dual-mode air nozzle includes a venturi tube, a cold air inlet tube, and an air nozzle. The venturi tube includes a constricted section, a throat, and a flared section connected in sequence. The cold air inlet tube is fixedly connected to the throat, and the air nozzle is connected to the flared section. A hot air supply assembly is connected to the constricted section of a venturi tube, and the hot air supply assembly is used to supply hot air to the venturi tube. The control component includes: a controller mounted on the vehicle body; a telescopic device vertically mounted at the lower end of the vehicle body and electrically connected to the controller; and a valve plate fixedly connected to the telescopic end of the telescopic device for opening or closing the cold air inlet pipe.

[0006] Preferably, the hot air supply assembly includes: a storage tank, which is mounted on the vehicle body and is used to store sealant in a heated state; a sleeve, which is fitted over the outside of the storage tank, forming a cavity between the sleeve and the storage tank, and the constricted section of the venturi tube is connected to the lower part of the cavity; and a fan, which is connected to the upper part of the cavity and is electrically connected to a controller.

[0007] Preferably, the cavity is provided with a spiral blade, the inner side of which is fixedly connected to the storage tank, and the outer side of which is fixedly connected to the inner wall of the sleeve.

[0008] Preferably, the outer wall of the storage tank is provided with heat dissipation fins that extend into the cavity.

[0009] Preferably, a vacuum insulation layer is provided on the outer side of the sleeve.

[0010] Preferably, the storage tank is equipped with a heater that is electrically connected to the controller.

[0011] Preferably, the air nozzle is tilted downwards.

[0012] Preferably, the storage tank is connected to a feed pump electrically connected to the controller, and the feed pump is connected to a feed pipe.

[0013] Preferably, the bottom of the vehicle body has two side plates arranged opposite each other, the line connecting the two side plates is perpendicular to the forward direction of the vehicle body, a rotating shaft is fixedly connected between the two side plates, two mounting plates are rotatably connected on the rotating shaft, an abutment plate and a pressure roller are arranged between the two mounting plates, the abutment plate and the pressure roller are located on both sides of the rotating shaft, and the abutment plate contacts the bottom of the valve plate under the gravity of the pressure roller.

[0014] A method for repairing cracks in highway maintenance includes the following steps: S1: The heater heats the sealant inside the storage tank, and some of the heat is dissipated into the cavity through the tank wall; S2: The fan draws in cold air from the environment. As the cold air passes through the cavity, it exchanges heat with the cavity to form a high-temperature, low-speed hot air. S3: The controller controls the telescopic device to open the valve plate. When the hot air passes through the Venturi tube, under the action of the Venturi effect, some ambient cold air is drawn in from the cold air inlet pipe. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. The vehicle body moves from the beginning of the crack to the end, completely blowing away the dust. S4: The controller controls the telescopic device to close the valve plate. High-temperature, low-speed hot air passes directly through the venturi tube. The vehicle body moves from the tail end of the crack to the starting end. After evaporating the moisture inside the crack and preheating the crack, sealant is injected.

[0015] Compared to existing technologies, this invention utilizes a coordinated arrangement of a vehicle body, a cold air inlet pipe, a nozzle, a constriction section, a throat, a flaring section, a hot air supply assembly, a controller, a telescopic device, and a valve plate. The hot air supply assembly provides high-temperature, low-speed hot air to the Venturi tube. The vehicle body moves from the beginning to the end of the crack, and the controller controls the telescopic device to open the valve plate. As the hot air passes through the Venturi tube, the Venturi effect draws in some ambient cold air from the cold air inlet pipe. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. This high-speed airflow effectively blows away dust without "baking" it onto the crack surface due to excessive temperature. As the vehicle body moves from the end to the beginning of the crack, the controller controls the telescopic device to close the valve plate. The high-temperature, low-speed hot air directly passes through the Venturi tube. The high temperature efficiently evaporates deep moisture and preheats the crack wall, reducing the temperature difference with the sealant and promoting the flow and wetting of the sealant. This achieves deep drying and preheating, which is beneficial for improving the quality of crack repair. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a schematic diagram of the main sectional view of the sleeve structure of the present invention; Figure 3 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle; Figure 4 This is a partial bottom view of the structure of the present invention; Figure 5 This is a schematic diagram of the main sectional view of the storage tank of the present invention; Figure 6 This is a schematic diagram of the control system of the present invention.

[0017] In the diagram: 1. Vehicle body; 2. Cold air inlet pipe; 3. Narrowing section; 4. Throat; 5. Expanding section; 6. Nozzle; 7. Controller; 8. Telescopic device; 9. Valve plate; 10. Storage tank; 11. Sleeve; 12. Cavity; 13. Fan; 14. Spiral blade; 15. Heat dissipation fins; 16. Vacuum insulation layer; 17. Heater; 18. Feed pump; 19. Feed pipe; 20. Side plate; 21. Shaft; 22. Mounting plate; 23. Abutment plate; 24. Pressure roller; 25. Motor; 26. Stirring rod; 27. Stirring blade; 28. Scraper. Detailed Implementation

[0018] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] like Figure 1 , Figure 3 as well as Figure 6 As shown, a crack repair device and method for highway maintenance are disclosed, wherein the crack repair device for highway maintenance in this invention includes: Vehicle body 1; The dual-mode air nozzle includes a venturi tube, a cold air inlet pipe 2, and an air nozzle 6. The venturi tube includes a constricted section 3, a throat 4, and a flared section 5 connected in sequence. The cold air inlet pipe 2 is fixedly connected to the throat 4, and the air nozzle 6 is connected to the flared section 5. Hot air supply assembly, which is connected to the constricted section 3 of the venturi tube, is used to supply hot air to the venturi tube. The control components include: a controller 7, which is mounted on the vehicle body 1 and is a programmable logic controller or a microcontroller; a telescopic device 8, which is vertically mounted at the lower end of the vehicle body 1 and is electrically connected to the controller 7, and is an electric push rod; and a valve plate 9, which is fixedly connected to the telescopic end of the telescopic device 8 and is used to open or close the cold air inlet pipe 2.

[0020] In practical use, the hot air supply component provides high-temperature, low-speed hot air to the Venturi tube. The vehicle body 1 moves from the beginning to the end of the crack. The controller controls the telescopic device 8 to open the valve plate 9. When the hot air passes through the Venturi tube, under the action of the Venturi effect, some ambient cold air is drawn in from the cold air inlet pipe 2. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. The high-speed airflow can effectively blow away dust without "baking" the dust on the crack surface due to excessive temperature. The vehicle body 1 moves from the end to the beginning of the crack. The controller controls the telescopic device 8 to close the valve plate 9. The high-temperature, low-speed hot air passes directly through the Venturi tube. The high temperature can efficiently evaporate deep moisture and preheat the crack wall. Then, the sealant is injected.

[0021] like Figures 1 to 2 As shown, in order to improve the repair quality of cracks, the hot air supply assembly preferably includes: a storage tank 10, which is mounted on the vehicle body 1 and is used to store sealant in a heated state; a sleeve 11, which is fitted over the outside of the storage tank 10, forming a cavity 12 between the sleeve 11 and the storage tank 10, with the constricted section 3 of the venturi tube connected to the lower part of the cavity 12; and a blower 13, which is connected to the upper part of the cavity 12 and electrically connected to the controller 7. The blower 13 is a centrifugal blower, which can provide high air pressure to overcome the resistance brought by the air duct and ensure sufficient purging force at the outlet.

[0022] Specifically, the blower 13 draws in cold air from the environment. As the cold air passes through the cavity 12, it exchanges heat with the cavity 12 to form high-temperature, low-speed hot air. During the process of transporting the hot air to the venturi tube, it is continuously heated by the heat inside the cavity 12, so there is no heat loss. This provides higher-temperature hot air to the crack, improves the drying effect on the inner wall of the crack, and thus improves the repair quality of the crack. At the same time, it realizes the secondary utilization of the heat lost by the sealant, which is energy-saving and environmentally friendly.

[0023] like Figure 2 As shown, in order to improve the repair quality of cracks, preferably, a spiral blade 14 is provided inside the cavity 12. The inner side of the spiral blade 14 is fixedly connected to the storage tank 10, and the outer side of the spiral blade 14 is fixedly connected to the inner wall of the sleeve 11.

[0024] Specifically, by setting the spiral blades 14, an air duct is formed inside the cavity 12 to guide the air through, increasing the airflow path and heat exchange time, thereby providing hot air at a higher temperature to the crack, improving the drying effect on the inner wall of the crack, thus improving the repair quality of the crack, and at the same time improving the waste heat utilization efficiency.

[0025] like Figure 2As shown, in order to improve the quality of crack repair, preferably, the outer wall of the storage tank 10 is provided with heat dissipation fins 15 that extend into the cavity 12.

[0026] Specifically, the heat dissipation fins 15 are made of aluminum or copper, which greatly increases the heat exchange area and is key to increasing the hot air temperature. This facilitates the supply of hot air at a higher temperature to the crack, improves the drying effect on the inner wall of the crack, thereby improving the repair quality of the crack and increasing the efficiency of waste heat utilization.

[0027] like Figure 2 As shown, in order to improve the quality of crack repair, preferably, a vacuum insulation layer 16 is provided on the outer side of the sleeve 11.

[0028] Specifically, by setting up the vacuum insulation layer 16, on the one hand, the temperature of the outer surface of the equipment is kept within a safe range to prevent burns to operators and improve safety; on the other hand, it prevents heat from being lost back into the environment and forces the heat to be discharged from the outlet of the air nozzle 6 with the airflow, so that it is used entirely for drying the cracks, thereby improving the quality of crack repair and improving the efficiency of waste heat utilization.

[0029] like Figure 5 As shown, in order to improve the quality of crack repair, preferably, the storage tank 10 is equipped with a heater 17 electrically connected to the controller 7. The heater 17 is an electric heater.

[0030] Specifically, heater 17 heats the sealant to maintain its good flowability, and the heat dissipated from storage tank 10 is used for crack drying.

[0031] like Figures 1 to 3 As shown, in order to improve the quality of crack repair, preferably, the air nozzle 6 is tilted downwards at an angle between 30 and 45 degrees, and the air nozzle 6 faces away from the feed pipe 19.

[0032] Specifically, during the high-speed dust removal phase, the air nozzle 6 is tilted towards the front of the crack. The airflow blowing from the nozzle 6 carries the dust forward, causing it to "roll" away from the crack area. This ensures the airflow always travels from clean to dirty areas, preventing secondary contamination of the crack and improving the cleaning effect, thus enhancing the quality of the crack repair. During the high-temperature drying phase, the airflow moves from the tail end of the crack towards the starting end, in the opposite direction to the dust removal. This ensures that in the final stage, any traces of dust that might be carried away by the hot air are blown towards the already treated area, rather than the area yet to be treated.

[0033] like Figure 1 As shown, preferably, the storage tank 10 is connected to a feed pump 18 that is electrically connected to the controller 7, and the feed pump 18 is connected to a feed pipe 19.

[0034] Specifically, during the high-temperature drying stage, the feed pump 18 is started to deliver the sealant in the storage tank 10 to the crack through the feed pipe 19 to repair the crack.

[0035] like Figure 1 as well as Figures 3 to 4 As shown, in order to improve the repair quality of cracks, preferably, two side plates 20 are arranged opposite each other at the bottom of the vehicle body 1. The line connecting the two side plates 20 is perpendicular to the forward direction of the vehicle body 1. A rotating shaft 21 is fixedly connected between the two side plates 20. Two mounting plates 22 are rotatably connected to the rotating shaft 21. An abutment plate 23 and a pressure roller 24 are arranged between the two mounting plates 22. The abutment plate 23 and the pressure roller 24 are located on both sides of the rotating shaft 21. The abutment plate 23 contacts the bottom of the valve plate 9 under the gravity of the pressure roller 24. The feed pipe 19 is located between the telescopic device 8 and the pressure roller 24.

[0036] Specifically, during the high-speed dust removal stage, the telescopic end of the telescopic device 8 is in the extended state, and the downward-moving valve plate 9 will drive the two mounting plates 22 to rotate counterclockwise around the rotating shaft 21 by a predetermined angle through the abutment plate 23. The pressure roller 24 is lifted from the ground to avoid bringing dust into the already cleaned cracks. During the high-temperature drying stage, the telescopic end of the telescopic device 8 is in the retracted state, and the pressure roller 24 will rotate clockwise around the rotating shaft 21 under the action of gravity until it contacts the ground, compacting the sealant in the cracks and improving the repair effect of the cracks.

[0037] like Figure 5 As shown, in order to improve the quality of crack repair, preferably, a motor 25 is provided at the upper end of the storage tank 10, and a stirring rod 26 extending into the storage tank 10 is fixedly connected to the output end of the motor 25. A plurality of stirring blades 27 are provided on the stirring rod 26, and a scraper 28 that contacts the inner wall of the storage tank 10 is fixedly connected to the end of the stirring blades 27.

[0038] Specifically, during the sealant injection process, the motor 25 drives the stirring rod 26 to rotate the stirring blades 27 and scraper 28, which stirs the sealant in real time and scrapes off the sealant adhering to the wall of the storage tank 10, so that the sealant is heated evenly, thereby improving the repair effect of the crack.

[0039] A method for repairing cracks in highway maintenance includes the following steps: S1: Heater 17 heats the sealant inside storage tank 10, and some of the heat is dissipated into cavity 12 through the tank wall of storage tank 10; S2: Fan 13 draws in cold air from the environment. As the cold air passes through cavity 12, it exchanges heat with cavity 12 to form hot air with high temperature and low speed. S3: The controller controls the telescopic device 8 to open the valve plate 9. When the hot air passes through the Venturi tube, under the action of the Venturi effect, some ambient cold air is drawn in from the cold air inlet pipe 2. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. The vehicle body 1 moves from the beginning end of the crack to the end end, completely blowing away the dust. S4: The controller controls the telescopic device 8 to close the valve plate 9. High-temperature, low-speed hot air passes directly through the venturi tube. The vehicle body 1 moves from the tail end of the crack to the starting end. After evaporating the moisture inside the crack and preheating the crack, sealant is injected.

[0040] Compared to existing technologies, this invention utilizes a coordinated arrangement of a vehicle body 1, a cold air inlet pipe 2, an air nozzle 6, a constriction section 3, a throat 4, a flaring section 5, a hot air supply assembly, a controller 7, a telescopic device 8, and a valve plate 9. The hot air supply assembly provides high-temperature, low-speed hot air to the Venturi tube. The vehicle body 1 moves from the beginning to the end of the crack. The controller controls the telescopic device 8 to open the valve plate 9. As the hot air passes through the Venturi tube, the Venturi effect draws in some ambient cold air from the cold air inlet pipe 2. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. This high-speed airflow effectively blows away dust without "baking" it onto the crack surface due to excessive temperature. As the vehicle body 1 moves from the end to the beginning of the crack, the controller controls the telescopic device 8 to close the valve plate 9. The high-temperature, low-speed hot air passes directly through the Venturi tube. The high temperature efficiently evaporates deep moisture and preheats the crack wall, reducing the temperature difference with the sealant and promoting the flow and wetting of the sealant. This achieves deep drying and preheating, which is beneficial for improving the quality of crack repair.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A crack repair device for highway maintenance, characterized in that, include: Vehicle body; A dual-mode air nozzle includes a venturi tube, a cold air inlet tube, and an air nozzle. The venturi tube includes a constricted section, a throat, and a flared section connected in sequence. The cold air inlet tube is fixedly connected to the throat, and the air nozzle is connected to the flared section. A hot air supply assembly is connected to the constricted section of a venturi tube, and the hot air supply assembly is used to supply hot air to the venturi tube. The control component includes: a controller mounted on the vehicle body; a telescopic device vertically mounted at the lower end of the vehicle body and electrically connected to the controller; and a valve plate fixedly connected to the telescopic end of the telescopic device for opening or closing the cold air inlet pipe.

2. The crack repair equipment for highway maintenance according to claim 1, characterized in that: The hot air supply assembly includes: a storage tank, which is mounted on the vehicle body and is used to store sealant in a heated state; a sleeve, which is fitted over the outside of the storage tank, forming a cavity between the sleeve and the storage tank, and the constricted section of the venturi tube is connected to the lower part of the cavity; and a fan, which is connected to the upper part of the cavity and is electrically connected to a controller.

3. The crack repair equipment for highway maintenance according to claim 2, characterized in that: The cavity is equipped with a spiral blade. The inner side of the spiral blade is fixedly connected to the storage tank, and the outer side of the spiral blade is fixedly connected to the inner wall of the sleeve.

4. The crack repair equipment for highway maintenance according to claim 2, characterized in that: The outer wall of the storage tank is provided with heat dissipation fins that extend into the cavity.

5. The crack repair equipment for highway maintenance according to claim 2, characterized in that: A vacuum insulation layer is fitted on the outer side of the sleeve.

6. The crack repair equipment for highway maintenance according to claim 2, characterized in that: The storage tank is equipped with a heater that is electrically connected to the controller.

7. The crack repair equipment for highway maintenance according to claim 1, characterized in that: The air nozzle is tilted downwards.

8. The crack repair equipment for highway maintenance according to claim 2, characterized in that: The storage tank is connected to a feed pump that is electrically connected to the controller, and the feed pump is connected to a feed pipe.

9. The crack repair equipment for highway maintenance according to claim 1, characterized in that: The bottom of the vehicle body has two side plates facing each other. The line connecting the two side plates is perpendicular to the forward direction of the vehicle body. A rotating shaft is fixedly connected between the two side plates. Two mounting plates are rotatably connected to the rotating shaft. An abutment plate and a pressure roller are provided between the two mounting plates. The abutment plate and the pressure roller are located on both sides of the rotating shaft. The abutment plate contacts the bottom of the valve plate under the gravity of the pressure roller.

10. A method for repairing cracks in highway maintenance, implemented according to claim 7, characterized in that, Includes the following steps: S1: The heater heats the sealant inside the storage tank, and some of the heat is dissipated into the cavity through the tank wall; S2: The fan draws in cold air from the environment. As the cold air passes through the cavity, it exchanges heat with the cavity to form a high-temperature, low-speed hot air. S3: The controller controls the telescopic device to open the valve plate. When the hot air passes through the Venturi tube, under the action of the Venturi effect, some ambient cold air is drawn in from the cold air inlet pipe. The cold air mixes with the hot air, generating an airflow with increased speed but decreased temperature. The vehicle body moves from the beginning of the crack to the end, completely blowing away the dust. S4: The controller controls the telescopic device to close the valve plate. High-temperature, low-speed hot air passes directly through the venturi tube. The vehicle body moves from the tail end of the crack to the starting end. After evaporating the moisture inside the crack and preheating the crack, sealant is injected.

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