A road surface slotting and breaking repair device and a repair method thereof

Abstract

The application discloses a road surface slotting, breaking and repairing device and a repairing method thereof, and relates to the field of road surface construction.The device comprises a vehicle frame, a heating assembly and an asphalt cylinder, the heating assembly is installed above a support frame, the top end of the asphalt cylinder is provided with a cover plate, a pressure detector and a warning light, and the pressure detector detects the pressure inside the asphalt cylinder in real time.When filling the asphalt joint, the melted asphalt is sent into the composite pipe body through the asphalt pump, a plurality of heating gaskets are arranged in the composite pipe body, the asphalt hose can be heated, the temperature of the asphalt is ensured, the flowability of the asphalt is ensured, the transportation efficiency of the asphalt is improved, and at the same time of heating, the airflow flows from the air pipe, the air pipe is arranged outside the power supply wire, and when heating and heat preservation are performed, the airflow can pass outside the power supply wire, so that the power supply wire is effectively cooled, and the power supply wire can be used at a suitable temperature.

Description

Technical Field

[0001] This invention relates to the field of road construction, specifically to a road grooving and breaking repair device and its repair method. Background Technology

[0002] When grooving and breaking up asphalt pavements for repair, a grooving machine is typically used to cut the cracks, potholes, and other defects in the pavement into regular-shaped grooves. Then, heated and molten asphalt is poured into the grooves using a grouting device. After the asphalt cools and solidifies, the repair is complete. During this process, to ensure the quality of the repair, any remaining gravel, dust, or other impurities must be thoroughly removed from the grooves after grooving to ensure good adhesion between the asphalt material and the groove walls. In addition, after the asphalt is poured into the grooves, the surface must be properly treated to facilitate uniform cooling and surface smoothing of the asphalt, and to remove any air that may be present inside the asphalt.

[0003] However, in the existing construction process, small impurities remaining in the groove after grooving, especially fragments stuck in the gaps, are difficult to completely remove with conventional air blowing or simple cleaning methods. This will interfere with the asphalt injection effect and affect the bonding strength between the new and old materials. At the same time, after the asphalt is injected into the groove, there is a lack of effective post-treatment methods, and air bubbles are easily retained inside the asphalt, affecting the compactness of the grout and the durability of the repair. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a road surface grooving and breaking repair device and its repair method, so as to solve the technical problems in the prior art that it is not easy to remove impurities in the groove after grooving and that the lack of effective post-treatment means after asphalt injection leads to poor repair quality. It achieves the beneficial effects of improving cleaning efficiency, ensuring the density and smoothness of the grouting, and improving the repair quality.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a road surface grooving and breaking repair device, comprising:

[0006] Frame;

[0007] The fan unit is mounted on the vehicle frame;

[0008] A heating assembly, mounted on the vehicle frame, is used to heat the asphalt;

[0009] An asphalt cylinder, mounted on the frame and thermally coupled to the heating assembly, is used to contain heated asphalt;

[0010] An asphalt pump is installed on the asphalt cylinder or the vehicle frame, with its input end connected to the asphalt cylinder, for pumping asphalt from the asphalt cylinder.

[0011] And a composite pipe body, the composite pipe body having an input end and an end end, the input end being connected to the output end of the asphalt pump and the output end of the blower unit respectively;

[0012] The composite pipe integrates an asphalt flow channel, a heating unit surrounding the asphalt flow channel, and an airflow channel surrounding the heating unit and connected to the fan unit.

[0013] The heating unit is used to heat and keep the asphalt in the asphalt channel warm; the airflow channel is used to transport airflow from the fan unit, and the airflow can dissipate heat from the conductive parts in the heating unit during the flow process.

[0014] Furthermore, the composite tube body includes:

[0015] An asphalt hose is disposed in the innermost layer of the composite pipe body, forming the asphalt flow channel;

[0016] Heating pads are laid on the outer wall of the asphalt hose, forming the heating body of the heating unit;

[0017] A power supply wire is electrically connected to the heating pad and is used to supply power to the heating pad.

[0018] The trachea has an internal airflow channel, and the power supply wire is located inside the trachea.

[0019] And an insulation layer, which covers the outside of the trachea, forming the outermost layer of the composite tube;

[0020] The air duct is connected to the output end of the fan unit. When the airflow from the fan unit flows through the air duct, it provides air cooling for the internal power supply wires.

[0021] Furthermore, the composite pipe body has a multi-layer coaxial structure, consisting of, from the inside out: the asphalt hose, the heating pad wrapped around the outer wall of the asphalt hose, the air pipe sleeved on the outside of the heating pad, and the outermost insulation layer.

[0022] Furthermore, the asphalt hose is made of polytetrafluoroethylene; the heating pad is a flexible silicone heating pad; the air tube is a flexible polyurethane tube; and the insulation layer is a ceramic fiber insulation layer.

[0023] Furthermore, a nozzle assembly is connected to the end of the composite tube, the nozzle assembly comprising:

[0024] The nozzle is internally connected to the asphalt flow channel and is used to spray asphalt; an air jet pipe is provided on its outer wall and is connected to the airflow channel to spray airflow.

[0025] Furthermore, the nozzle assembly also includes a preheating component, which is disposed on the outside of the nozzle and communicates with the outlet of the airflow channel. The preheating component is used to reheat part or all of the airflow drawn from the airflow channel to generate hot airflow for preheating the area surrounding the slot.

[0026] In one embodiment, the preheating component includes:

[0027] A heating plate, which has an internal air passage cavity communicating with the airflow channel, is installed on the outside of the nozzle;

[0028] An electric heater, installed inside the heating plate, is used to generate heat to heat the airflow passing through the air passage cavity.

[0029] Furthermore, multiple sets of heat-conducting plates are installed inside the heating plate, and the heat-conducting plates are thermally connected to the electric heater to uniformly transfer heat to the entire wall surface of the heating plate.

[0030] Furthermore, an insulation board is attached to the outer wall of the heating plate to reduce heat loss.

[0031] Furthermore, the power supply for the preheating component is provided through power supply wires extending within the composite tube.

[0032] Furthermore, a pressure safety component is installed on the top of the asphalt cylinder. The pressure safety component is used to monitor the internal pressure of the asphalt cylinder and to trigger an alarm and perform safety protection actions when the pressure exceeds a preset threshold.

[0033] Furthermore, the pressure safety component includes:

[0034] A pressure detector, installed on the top of the asphalt cylinder, is used to sense the internal pressure of the asphalt cylinder and convert it into an electrical signal;

[0035] Warning lights are installed on the top of the asphalt cylinder;

[0036] The control unit is electrically connected to the power supply circuits of the pressure detector, the warning light, and the heating assembly, respectively, and is used to receive the pressure signal from the pressure detector.

[0037] When the pressure signal exceeds the first threshold, the control unit drives the warning light to provide a visual warning; when the pressure signal exceeds the second threshold, the control unit drives the warning light to provide both visual and audible alarms and automatically cuts off the power supply to the heating component.

[0038] Furthermore, a walking mechanism is installed at the bottom of the frame, and a handle is installed at the front end.

[0039] According to another aspect of the present invention, a method for road surface grooving and breaking repair is also provided, which uses the road surface grooving and breaking repair equipment as described above, and includes the following steps:

[0040] In the air supply cleaning step, the fan unit is started, the fan unit generates airflow, the airflow enters the airflow channel of the composite pipe, cools the conductive parts in the heating unit along the way, and finally sprays out from the end of the composite pipe to blow away and clean the impurities inside the groove.

[0041] In the heating asphalt step, the heating component is activated to heat the asphalt inside the asphalt cylinder until the asphalt reaches a preset temperature.

[0042] In the delivery and insulation grouting step, the asphalt pump is started to pump the heated asphalt from the asphalt cylinder into the asphalt channel of the composite pipe; at the same time, the power supply of the heating unit is turned on, and the heating unit heats and insulates the asphalt in the asphalt channel; subsequently, the asphalt is sprayed from the end of the composite pipe and injected into the groove.

[0043] In the post-processing step, the fan unit continues to supply air, and the airflow is sprayed out from the end of the composite pipe to blow air onto the injected asphalt surface to drive away heat, assist in uniform cooling and smooth the surface.

[0044] Furthermore, the gas supply cleaning step and the post-processing step also include a preheating step: the preheating component set at the end of the composite pipe is activated to reheat the airflow drawn from the airflow channel. The heated hot airflow is sprayed onto the asphalt around the groove to soften its surface before asphalt injection.

[0045] In the road grooving and breaking repair equipment and method described in this invention, a composite pipe integrating an asphalt flow channel, a heating unit, and an airflow channel is used. The airflow within the airflow channel serves two purposes: firstly, it forces heat dissipation from the conductive parts of the heating unit used to heat the asphalt flow channel, ensuring its operational stability and service life; secondly, the airflow acts as a cleaning tool, spraying out from the end of the composite pipe to remove impurities within the grooving. It can also be used to blow air across the asphalt surface after asphalt injection, thus dispersing heat, aiding in uniform cooling, and leveling. Therefore, this solution cleverly utilizes the same airflow channel to achieve heat dissipation for electrical components and cleaning and post-treatment of the construction area, significantly improving the integration and automation level of the equipment, solving the problems of difficult grooving cleaning and improper post-injection treatment, and improving the quality and efficiency of road repair.

[0046] In summary, the present invention has the following main beneficial effects:

[0047] 1. The present invention, through the setting of the fan assembly and composite pipe body, can generate airflow by the operation of the fan unit before pouring, especially during the melting of asphalt. The airflow is injected into the composite pipe body. The composite pipe body has an air pipe inside, and the airflow enters the jet pipe through the air pipe and is ejected from the jet pipe, thereby effectively cleaning the groove and reducing the accumulation of impurities in the groove.

[0048] 2. In this invention, during asphalt joint filling, molten asphalt is pumped into a composite pipe body via an asphalt pump. Multiple heating pads are installed inside the composite pipe body to heat the asphalt hose, ensuring the asphalt temperature and fluidity, thus improving asphalt transportation efficiency. Simultaneously, airflow passes through an air pipe located outside the power supply conductor. During heating and insulation, the airflow passes through the outside of the power supply conductor, effectively cooling it and ensuring it operates at a suitable temperature.

[0049] 3. During the use of this invention, the heating plate can heat the air sprayed out while cleaning the groove, thereby preheating the asphalt around the groove and softening the asphalt at the groove. This effectively improves the connection between the asphalt and the groove during subsequent asphalt injection. Furthermore, after the asphalt is injected, the insulation plate of the heating plate can be used to scrape off the asphalt surface, improving the smoothness. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the present invention;

[0051] Figure 2 This is a schematic diagram of the installation structure of the wind turbine unit of the present invention;

[0052] Figure 3 This is a schematic diagram of the asphalt pump and connecting pipe of the present invention;

[0053] Figure 4 This is a schematic diagram of the structure of the wind turbine unit of the present invention;

[0054] Figure 5 This is a schematic diagram of the air inlet groove of the fan sealing shell of the present invention;

[0055] Figure 6 This is a schematic diagram of the nozzle structure of the present invention;

[0056] Figure 7 This is a schematic diagram of the cross-section of the composite tube body of the present invention;

[0057] Figure 8 This is a schematic diagram of the structure of the composite pipe body and the air inlet connector of the present invention.

[0058] Figure 9 This is a schematic diagram of the cross-sectional structure of the nozzle of the present invention;

[0059] Figure 10 This is a schematic diagram of the nozzle structure according to the second embodiment of the present invention;

[0060] Figure 11 This is a schematic diagram of the heating plate according to the second embodiment of the present invention;

[0061] Figure 12 This is a schematic diagram of the internal structure of the heating element in the second embodiment of the present invention;

[0062] Figure 13 This is a schematic diagram of the internal heat-conducting plate distribution in the second embodiment of the present invention.

[0063] Explanation of reference numerals in the attached figures:

[0064] 1. Frame; 101. Handlebar; 2. Power supply assembly; 3. Fuel tank; 4. Heating assembly; 5. Asphalt cylinder; 501. Cover plate; 502. Pressure detector; 503. Warning light; 504. Asphalt pump; 5041. Base; 505. Fixing sleeve; 506. Protective cover; 507. Pump housing; 508. Discharge pipe; 509. Extraction pipe; 6. Feed port; 7. Composite pipe body; 701. Asphalt hose; 702. Heating pad; 703. Power supply wire; 704. Air pipe; 705. Sealing layer; 706. Insulation layer; 70 7. Sleeve; 708. Air guide groove; 8. Conductive rod; 9. Walking mechanism; 10. Fixing frame; 11. Nozzle; 1101. Nozzle; 12. Control unit; 13. Fan unit; 1301. Sealing shell; 1302. Fan blade; 1303. Air concentrator; 1304. Air duct connector; 1305. Air inlet groove; 14. Jet pipe; 15. Positioning frame; 16. Heating plate; 1601. Insulation board; 1602. Support frame; 1603. Power connection port; 1604. Air connection port; 1605. Electric heater; 1606. Heat conduction plate. Detailed Implementation

[0065] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0066] This application aims to provide a road surface grooving and breaking repair equipment and a corresponding repair method to solve the problems existing in the prior art, such as incomplete grooving cleaning, lack of effective post-treatment after asphalt injection, and poor asphalt fluidity caused by uneven temperature of the conveying pipeline. The equipment is particularly suitable for precise repair of asphalt pavement cracks, potholes and other defects. It can achieve efficient airflow cleaning of the grooving during construction, full heating and heat preservation of the asphalt during the entire process, and auxiliary cooling and leveling treatment of the asphalt surface after injection, thereby significantly improving the bonding strength of new and old asphalt materials and the density and durability of the repaired pavement.

[0067] Figures 1 to 13 Specific embodiments of this application are shown, such as Figure 1 As shown, an embodiment of the present invention provides a road grooving and breaking repair device. The device includes a frame 1, a power supply component 2, a fan unit 13, a heating component 4, an asphalt cylinder 5, an asphalt pump 504, and a composite pipe 7. The frame 1 serves as the load-bearing foundation of the entire device, used to install and support other functional components. The fan unit 13 is mounted on the frame 1 and is used to generate airflow with specific pressure and speed. This airflow is not only used for subsequent grooving cleaning and asphalt surface post-treatment, but also cleverly used to forcibly dissipate heat from the conductive components inside the composite pipe 7, greatly improving the reliability and integration of the device. The heating component 4 is mounted on the frame 1, and its core function is to heat the asphalt. It typically uses a heating method with heat transfer oil as the medium to uniformly and stably transfer heat to the asphalt, bringing it to a suitable molten state for injection.

[0068] The asphalt cylinder 5 is installed on the frame 1 and thermally coupled with the heating component 4 to contain the heated asphalt. Thermal coupling means that the heat generated by the heating component 4 can be effectively transferred to the asphalt inside the asphalt cylinder 5. For example, by setting a jacket on the cylinder wall of the asphalt cylinder 5, the heated heat transfer oil can circulate in it to achieve uniform heat exchange. The side of the asphalt cylinder 5 is also provided with a feeding port 6 for adding raw materials.

[0069] The asphalt pump 504 is mounted on the asphalt cylinder 5 or the frame 1. In this embodiment, it is mounted on the side of the asphalt cylinder 5. The asphalt pump 504 is an internal gear pump, and its bottom end is connected to a base 5041 via a flange. The base 5041 has a coupling inside, which connects the output shaft of the motor (not shown) to the drive gear shaft of the asphalt pump 504. The pump casing 507 is the pump chamber of the gear pump, used for conveying asphalt. The input end of the pump casing 507 is connected to the inside of the asphalt cylinder 5 via a suction pipe 509, used for pumping molten asphalt from the asphalt cylinder 5. The output end of the pump casing 507 is connected to a discharge pipe 508. The pipe body 7 has an input end and an output end. Its input end is connected to the discharge pipe 508 of the asphalt pump 504 and the output end of the blower unit 13, respectively, so asphalt and airflow can be transported synchronously in the same integrated pipeline. The composite pipe body 7 integrates an asphalt flow channel, a heating unit set around the asphalt flow channel, and an airflow channel set around the heating unit and connected to the blower unit 13. This integrated design enables the composite pipe body 7 to have three functions at the same time: material conveying, full-process heat preservation and electrical heat dissipation. It solves the problems of structural bulkiness, large temperature loss and overheating of electrical components caused by the independent arrangement of multiple pipelines in traditional equipment.

[0070] In this embodiment, the composite pipe 7 further includes an asphalt hose 701, a heating pad 702, a power supply wire 703, an air pipe 704, and an insulation layer 706. For details, please refer to... Figure 7 The cross-sectional structure of the composite pipe 7 shown is as follows: The asphalt hose 701 is located in the innermost layer of the composite pipe 7, forming an asphalt flow channel for transporting molten asphalt. The heating pad 702 is laid on the outer wall of the asphalt hose 701, forming the heating element of the heating unit. It can directly and uniformly heat the pipe wall of the asphalt hose 701, thereby heating and insulating the asphalt within the flow channel, effectively preventing the asphalt from becoming less fluid due to temperature drop during transport. The power supply wire 703 is electrically connected to the heating pad 702 to supply power and generate heat. An airflow channel is formed inside the air pipe 704, and the power supply wire 703 is located inside the air pipe 704. The ingenuity of this design lies in… The air duct 704 is connected to the output end of the fan unit 13. When the airflow from the fan unit 13 flows through the air duct 704, it will continuously sweep across the surface of the power supply wire 703, subjecting it to forced air cooling. In this way, even if the power supply wire 703 supplies a large amount of electrical energy to the heating pad 702, the Joule heat generated by it can be quickly carried away by the airflow, thereby keeping it within the allowable operating temperature range, ensuring the stability of conductivity and insulation performance, and extending service life. The insulation layer 706 covers the outside of the air duct 704, forming the outermost layer of the composite tube body 7. Its main function is to isolate the influence of the external ambient temperature, reduce the loss of internal heat to the outside, and also provide physical protection for the air duct 704.

[0071] In a preferred embodiment, such as Figure 7 As shown, the composite pipe 7 has a multi-layer coaxial structure, consisting of, from the inside out: an asphalt hose 701, a heating pad 702 wrapped around the outer wall of the asphalt hose 701, an air pipe 704 sleeved on the outside of the heating pad 702, and an outermost insulation layer 706. This coaxial structure allows heat generated from the heating pad 702 to be transferred to the asphalt channel in the most uniform and concentrated manner from the inside out. At the same time, the air pipe 704 completely wraps the heating pad 702, making airflow heat dissipation more efficient. This structure ensures functionality while giving the pipe body good flexibility, facilitating construction operations.

[0072] To further improve the performance of the composite pipe 7, the selection of materials for each layer has been optimized. The asphalt hose 701 can be made of polytetrafluoroethylene (PTFE). PTFE has an extremely low coefficient of friction and non-stick properties, which can significantly reduce the resistance of molten asphalt flow in the pipe, prevent asphalt from sticking and clogging, and has excellent high-temperature resistance. The heating pad 702 can be made of flexible silicone heating pad, which has good flexibility and bendability, and can be tightly wrapped and adhered to the surface of the bent asphalt hose 701 to provide a uniform heat field. The air tube 704 can be made of flexible polyurethane tube, which has both good flexibility and pressure resistance, and can ensure the smooth flow of air. The insulation layer 706 can be made of ceramic fiber insulation layer, which has low thermal conductivity, high temperature resistance, and soft material, and can effectively insulate the pipe body without excessively sacrificing the bending performance of the pipe body. The above materials can be used alone or in combination to achieve the best high-temperature resistance, insulation, flexibility, and heat dissipation performance.

[0073] In addition to the aforementioned structure, the design and assembly of the composite pipe 7 have also been specially optimized to achieve a reliable connection with the fan unit 13 and the asphalt pump 504. Please refer to [link / reference needed]. Figure 8 The input end of the composite pipe 7 is connected to a cylindrical connecting structure, including a sleeve 707. After the asphalt hose 701 is connected to the discharge pipe 508 of the asphalt pump 504, the sleeve 707 is fitted on the outside. An insertion hole is opened on its side wall. The output end of the blower unit 13 is connected to a duct connector 1304. The duct connector 1304 can be inserted into the insertion hole to realize the connection of the airflow channel. An air guide groove 708 is opened inside the sleeve 707. The air guide groove 708 is arranged around the inner wall of the sleeve 707 and is connected to the inlet of each group of air pipes 704.

[0074] In this way, the airflow introduced from a single duct connector 1304 can be evenly distributed to multiple sets of parallel ducts 704 through the air guide groove 708, ensuring the uniformity of airflow distribution and avoiding excessive or insufficient local airflow.

[0075] In this embodiment, a nozzle assembly is connected to the end of the composite tube 7, such as... Figure 6 and Figure 9 As shown, the nozzle assembly includes a nozzle 11. The interior of the nozzle 11 is connected to the outlet end of the asphalt flow channel, i.e., the asphalt hose 701, of the composite pipe body 7. It is used to accurately spray the heated and insulated asphalt through the nozzle 1101 and pour it into the road groove. More importantly, an air jet pipe 14 is provided on the outer wall of the nozzle 11. The air jet pipe 14 is connected to the outlet end of the airflow channel, i.e., the air pipe 704, of the composite pipe body 7. It is used to spray airflow from the blower unit 13. In this way, before pouring asphalt, the operator can use the high-speed airflow sprayed from the air jet pipe 14 to blow and thoroughly clean the inside of the groove, removing residual gravel, dust and other impurities. After pouring asphalt, the airflow can be used to gently blow on the surface of the freshly poured asphalt to dissipate the heat accumulated on the surface and assist in its uniform cooling and initial surface smoothing. Through an integrated nozzle assembly, "one device for multiple uses" is achieved, greatly simplifying the operation process.

[0076] Based on this, in order to further improve the bonding quality of the interface between the new and old asphalt, the nozzle assembly of this embodiment is also equipped with a preheating component. The preheating component is located on the outside of the nozzle 11 and is connected to the outlet of the airflow channel. Its function is to reheat part or all of the airflow drawn from the airflow channel, thereby generating a hot airflow with a higher temperature. This hot airflow can be sprayed onto the existing road asphalt around the groove before the asphalt, preheating it and softening the surface layer of the aged asphalt on the sidewall and bottom of the groove. In this way, when fresh molten asphalt is injected later, due to the reduced temperature difference between the two and the certain viscosity of the softened layer, the new and old asphalt can better wet and fuse with each other, ultimately forming a whole. This significantly enhances the shear and pull-out resistance of the repair interface and prevents frequent failures.

[0077] Specifically, such as Figure 10 , Figure 11 , Figure 12 As shown, the preheating assembly includes a heating plate 16 and an electric heater 1605. The heating plate 16 is fixedly mounted on the positioning frame 15 on the outside of the nozzle 11 by a support frame 1602 and bolts. The interior of the heating plate 16 is provided with an air passage cavity that communicates with the airflow channel (through a set of jet pipes 14). The electric heater 1605 is installed inside the heating plate 16 and generates heat when energized to heat the airflow flowing through the air passage cavity. In this way, the room temperature airflow is rapidly heated when passing through the interior of the heating plate 16, and is transformed into hot airflow before being sprayed out, realizing the efficient hot air preheating function. In order to make the temperature of the heating plate 16 surface more uniform, multiple sets of heat-conducting plates 1606 are also installed inside it. These heat-conducting plates 1606 are thermally connected to the electric heater 1605. The high thermal conductivity of metal is used to quickly and evenly transfer the heat generated by the electric heater 1605 to the entire heating plate wall, avoiding local overheating and ensuring that the temperature of the sprayed hot airflow is stable and uniform.

[0078] Furthermore, in order to reduce energy loss and prevent burns to operators, an insulation board 1601 is attached to the outer wall of the heating plate 16. The insulation board 1601 is used to reduce the heat loss of the heating plate 16 to the outside cold air, so that as much of the heat generated by the electric heater 1605 is used to heat the airflow, thereby improving the thermal energy utilization efficiency.

[0079] Regarding the power supply method of the preheating component, this embodiment adopts a simple and efficient design. The power supply of the preheating component is provided through the power supply wire 703 extending inside the composite tube 7. Specifically, after the power supply wire 703 reaches the inside of the nozzle 11, a part of it is led out from the power connection port opened on its side and extends to the power connection port 1603 at the top of the heating plate 16 to connect the power supply to the internal electric heater 1605. This power supply method avoids the trouble of laying an independent power supply line for the preheating component, making the overall structure more compact. The power supply wire 703 is fully protected by the composite tube 7, which improves reliability and safety.

[0080] To ensure operational safety throughout the heating and conveying process, the road grooving and breaking repair equipment in this embodiment is equipped with a pressure safety component on the top of the asphalt cylinder 5. This pressure safety component is used to monitor the pressure inside the asphalt cylinder 5 in real time and to trigger an alarm and perform safety protection actions when the pressure exceeds a preset threshold, so as to prevent danger caused by abnormal pressure rise inside the cylinder due to asphalt vaporization or blockage at high temperatures.

[0081] like Figure 1 and Figure 2As shown, the pressure safety component specifically includes a pressure detector 502, a warning light 503, and a control unit 12. The pressure detector 502 is installed on the top cover plate 501 of the asphalt cylinder 5 and is used to sense the internal pressure of the asphalt cylinder and convert it into a continuous electrical signal, such as a 4-20mA current signal. Its pressure-sensing element is in direct contact with the gas inside the cylinder. The warning light 503 is also installed on the top of the asphalt cylinder 5 in a conspicuous position, such as an alarm with multi-color display and sound function. The control unit 12 is electrically connected to the power supply circuits of the pressure detector 502, the warning light 503, and the heating component 4. As the core of the entire safety system, the control unit 12 typically includes a microprocessor, memory, signal conditioning circuit, and output drive circuit, and is capable of receiving... The control unit 12 receives the pressure signal from the pressure detector 502 and compares it according to preset logic. When the received pressure signal exceeds the preset first threshold (e.g., 0.3 MPa), the control unit 12 determines that it is in a warning state and immediately drives the warning light 503 to provide a visual warning (e.g., emit a yellow flashing light) to alert the operator. When the pressure signal continues to rise and exceeds the more dangerous second threshold (e.g., 0.4 MPa), the control unit 12 determines that it is in a high-risk state and immediately drives the warning light 503 to provide a strong visual and audible alarm (e.g., emit a red light accompanied by a buzzer). At the same time, it automatically cuts off the power supply to the heating component 4, stops heating, and gradually reduces the internal pressure of the asphalt cylinder 5, thereby fundamentally preventing the occurrence of safety accidents such as explosions or asphalt spraying.

[0082] This tiered response safety control logic provides early warning of problems and executes emergency protection without human intervention at critical moments, greatly improving the active safety performance of the equipment.

[0083] To improve the on-site mobility of the equipment, a walking mechanism 9 is installed at the bottom of the chassis 1 in this embodiment, such as... Figure 1 As shown, the traveling mechanism 9 is specifically manifested as multiple wheels. Two large load-bearing wheels are installed at the lower rear of the frame 1, located below the center of gravity of the asphalt cylinder 5, which can effectively support the entire equipment. A smaller swivel wheel is installed at the lower front of the frame 1. A handle 101 is also installed at the front of the frame 1. By holding the handle 101 and using the traveling mechanism 9, the operator can easily and effortlessly pull or push the entire equipment to move and turn on the construction road surface. A fixing frame 10 is also installed on the side of the frame 1 for fixing and collecting the composite pipe 7, and protecting the composite pipe 7 when not in use.

[0084] In practical use, the composite pipe body 7 of the equipment first needs to be assembled. During assembly, the portion of the composite pipe body 7 with the sleeve 707 is first inserted into the fixed sleeve 505 and fixedly connected to the discharge pipe 508. The angle of the sleeve 707 is adjusted so that its opening is aligned with the opening of the fixed sleeve 505. Then, the conductive rod 8 on the side of the asphalt cylinder 5 is connected to a conductive wire, which passes through the fixed sleeve 505 and is connected to the power supply wire 703 inside the composite pipe body 7 to power the heating pad 702. Next, the air duct connector 1304 is inserted into the fixed sleeve 505, and at this time, the air duct connector 1304 is inserted into the opening position on the side of the sleeve 707. Then, the end of the air concentrator 1303 is attached to the outer wall of the sealing shell 1301 and secured with bolts. The air-collecting duct 1303 was fixed in place. Testing was then conducted by starting the blower unit 13 and observing whether air could be ejected from the jet pipe 14 and what the air pressure was. If the air pressure was low, the connection of the composite pipe 7 was checked for sealing, or whether there was any damage to the exterior of the composite pipe 7. After the checks were completed, the power was turned on, and the temperature of the composite pipe 7 was adjusted through the control unit 12 (the control unit 12 typically includes a microprocessor, memory, power circuit, input signal conditioning circuit, output drive circuit, as well as sensor interface, actuator interface, and communication interface; the model is Omron series, and the specific model can be adjusted according to the size of the asphalt cylinder 5). The temperature of the composite pipe was checked to see if it was heated evenly and normally. The output power was adjusted to ensure temperature output and ensure asphalt melting.

[0085] Before pouring, the blower unit 13 is started first. The blower unit 13 drives the fan blades 1302 to rotate, drawing in outside air through the air inlet slot 1305 and inputting the airflow into the interior of the composite pipe body 7 through the air concentrator 1303. The airflow flows through two sets of air pipes 704, and the sealing layer 705 at the edge seals the air pipes 704 to reduce airflow leakage. The airflow is finally sprayed out through the jet pipe 14. At this time, the operator aims the jet pipe 14 at the groove before pouring and cleans the groove with airflow, thereby reducing operation time and improving work efficiency.

[0086] During the preparation phase, the equipment is started and the initial temperature is set. The temperature display is checked every 10 minutes during preheating. During the heating phase, the crushed filler material is added and heated to 160℃. After reaching the target temperature, the temperature fluctuation is maintained at ≤5℃, and the viscosity is checked every 30 minutes. The material is added in batches to control the quantity. Power is supplied to the heating assembly 4 via power supply component 2 (usually a diesel generator set). An oil tank 3 is installed on the side of the heating assembly 4 to increase the circulation of heat transfer oil. The heating assembly 4 typically includes a heat transfer oil heater, a fuel burner, a heat transfer oil circulation pump, a double-layered asphalt tank, and a closed heat transfer oil circulation pipeline. It is equipped with a temperature sensor, an intelligent temperature controller, a stirring mechanism, and a heated discharge hose. Heat transfer oil is used as the heat transfer medium, and the burner heats the oil. A circulating pump drives the hot oil in a closed loop, circulating and exchanging heat within the asphalt cylinder 5 jacket and conveying pipeline. The double-layer tank body provides insulation. Sensors monitor the oil and asphalt material temperatures in real time, automatically adjusting the burner's heat output to facilitate temperature control within the asphalt cylinder 5. The heating process begins by starting the equipment power and activating the heat transfer oil circulating pump to allow the oil to circulate beforehand. The burner is then ignited to heat the oil, gradually heating the tank walls to preheat the entire equipment. Once the oil temperature reaches the base temperature, asphalt filler is added in batches, and the mixing device is activated for slow stirring. The high-temperature heat transfer oil continuously conducts heat, gradually melting the asphalt. A temperature control system monitors the temperature in real time and dynamically adjusts the heating power to stably control the asphalt within the standard construction temperature range. During operation, the heat transfer oil continuously circulates to insulate and control the temperature of the conveying hose and outlet, thereby heating the asphalt. Then, the asphalt pump 504 is started, drawing the heated asphalt from the asphalt cylinder 5 and delivering it into the asphalt composite pipe body 7. At this time, the power supply wire 703 is connected, supplying power to the heating pad 702. The heating pad 702 simultaneously heats the asphalt hose 701, ensuring its temperature and preventing the asphalt from cooling and reducing its fluidity. The asphalt then flows through the asphalt hose 701 into the nozzle 11 and is sprayed out from the nozzle 1101, pouring into the trench. At this time, two sets of spray pipes 14 are positioned, one in front of the trench on the ground and the other at the trench position after pouring, so that the front set of spray pipes... Air pipe 14 continues to clean the inside of the groove by blowing air to reduce the accumulation of impurities. A set of jet pipes 14 behind it blows the surface of the poured asphalt evenly and at a low flow rate (airflow speed controlled at 0.5-1m / s) to dissipate the hot air and odor on the asphalt surface, assist the asphalt to cool quickly and evenly and solidify initially, and prevent dust and impurities on the road surface from adhering too early. During the heating process, the airflow will flow through air pipe 704. Air pipe 704 is sleeved on the outer wall of power supply wire 703. When the airflow passes through air pipe 704 during the heating process, it can also effectively cool the power supply wire 703, avoid the power supply wire 703 from being too hot, which would affect the conductivity, improve the performance and service life of the power supply wire 703.

[0087] After completion, turn off the heating burner to stop the heat source supply, and continue to run the heat transfer oil circulation and tank agitator for a short time to allow the equipment to cool down slowly, avoiding coking and deterioration of the residual asphalt at high temperatures. Then, empty the remaining asphalt in the asphalt cylinder 5 and try to remove as much residual asphalt as possible from the composite pipe body 7. While the equipment pipeline and tank are still warm, open the cover plate 501, scrape off the residue adhering to the inner wall of the asphalt cylinder 5, and then pour in special cleaning oil or diesel. Start the pumping system to circulate and flush the asphalt pump 504 and the inside of the composite pipe body 7 to thoroughly flush out the residual asphalt gum inside. At the same time, clean the equipment exterior, crevices, and road stains, wipe the temperature control instruments and operating parts, and wipe off the cleaning agent residue after the equipment has completely cooled down. Store the pipeline fittings, turn off the main power, and end the work.

[0088] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A road surface grooving and breaking repair device, characterized in that, include: Frame; The fan unit is mounted on the vehicle frame; A heating assembly, mounted on the vehicle frame, is used to heat the asphalt; An asphalt cylinder, mounted on the frame and thermally coupled to the heating assembly, is used to contain heated asphalt; An asphalt pump is installed on the asphalt cylinder or the vehicle frame, with its input end connected to the asphalt cylinder, for pumping asphalt from the asphalt cylinder. And a composite pipe body, the composite pipe body having an input end and an end end, the input end being connected to the output end of the asphalt pump and the output end of the blower unit respectively; The composite pipe integrates an asphalt flow channel, a heating unit surrounding the asphalt flow channel, and an airflow channel surrounding the heating unit and connected to the fan unit. The heating unit is used to heat and keep the asphalt in the asphalt channel warm. The airflow channel is used to deliver airflow from the fan unit, and the airflow can dissipate heat from the conductive parts in the heating unit during the flow process.

2. The road surface grooving and breaking repair device according to claim 1, characterized in that, The composite tube body has a multi-layer coaxial structure, including, from the inside out, an asphalt hose, a heating pad wrapped around the outer wall of the asphalt hose, an air pipe sleeved outside the heating pad, and an outermost insulation layer: An asphalt hose is disposed in the innermost layer of the composite pipe body, forming the asphalt flow channel; Heating pads are laid on the outer wall of the asphalt hose, forming the heating body of the heating unit; A power supply wire is electrically connected to the heating pad and is used to supply power to the heating pad. The trachea has an internal airflow channel, and the power supply wire is located inside the trachea. And an insulation layer, which covers the outside of the trachea, forming the outermost layer of the composite tube; The air duct is connected to the output end of the fan unit. When the airflow from the fan unit flows through the air duct, it provides air cooling for the internal power supply wires.

3. The road surface grooving and breaking repair device according to any one of claims 1 or 2, characterized in that, The end of the composite tube is connected to a nozzle assembly, which includes: The nozzle is internally connected to the asphalt flow channel for spraying asphalt, and has an air jet pipe on its outer wall that is connected to the airflow channel for spraying airflow.

4. The road surface grooving and breaking repair device according to claim 3, characterized in that, The nozzle assembly also includes a preheating component, which is disposed on the outside of the nozzle and communicates with the outlet of the airflow channel. The preheating component is used to reheat part or all of the airflow drawn from the airflow channel to generate hot airflow for preheating the area surrounding the slot.

5. The road surface grooving and breaking repair device according to claim 4, characterized in that, The preheating component includes: A heating plate, which has an internal air passage cavity communicating with the airflow channel, is installed on the outside of the nozzle; An electric heater, installed inside the heating plate, is used to generate heat to heat the airflow passing through the air passage cavity.

6. The road surface grooving and breaking repair device according to claim 5, characterized in that, The power supply for the preheating component is provided through power supply wires extending from within the composite tube.

7. The road surface grooving and breaking repair device according to any one of claims 1 or 2, characterized in that, A pressure safety component is installed on the top of the asphalt cylinder. The pressure safety component is used to monitor the internal pressure of the asphalt cylinder and to trigger an alarm and perform safety protection actions when the pressure exceeds a preset threshold.

8. The road surface grooving and breaking repair device according to claim 7, characterized in that, The pressure safety component includes: A pressure detector, installed on the top of the asphalt cylinder, is used to sense the internal pressure of the asphalt cylinder and convert it into an electrical signal; Warning lights are installed on the top of the asphalt cylinder; The control unit is electrically connected to the power supply circuits of the pressure detector, the warning light, and the heating assembly, respectively, and is used to receive the pressure signal from the pressure detector. When the pressure signal exceeds the first threshold, the control unit drives the warning light to provide a visual warning; when the pressure signal exceeds the second threshold, the control unit drives the warning light to provide both visual and audible alarms and automatically cuts off the power supply to the heating component.

9. A method for road surface grooving and breaking repair, characterized in that, Using the road surface grooving and breaking repair device as described in any one of claims 1 to 8 includes the following steps: In the air supply cleaning step, the fan unit is started, the fan unit generates airflow, the airflow enters the airflow channel of the composite pipe, cools the conductive parts in the heating unit along the way, and finally sprays out from the end of the composite pipe to blow away and clean the impurities inside the groove. In the heating asphalt step, the heating component is activated to heat the asphalt inside the asphalt cylinder until the asphalt reaches a preset temperature. In the delivery and insulation grouting step, the asphalt pump is started to pump the heated asphalt from the asphalt cylinder into the asphalt channel of the composite pipe; at the same time, the power supply of the heating unit is turned on, and the heating unit heats and insulates the asphalt in the asphalt channel; subsequently, the asphalt is sprayed from the end of the composite pipe and injected into the groove. In the post-processing step, the fan unit continues to supply air, and the airflow is sprayed out from the end of the composite pipe to blow air onto the injected asphalt surface to drive away heat, assist in uniform cooling and smooth the surface.

10. The method for road surface grooving and breaking repair according to claim 9, characterized in that, The gas supply cleaning step and the post-processing step also include a preheating step: the preheating component set at the end of the composite pipe is activated to reheat the airflow drawn from the airflow channel. The heated airflow is sprayed onto the asphalt around the groove to soften its surface before asphalt injection.

Images