A multifunctional modifier spraying device for improving the skid resistance of recycled mixtures

Abstract

The utility model relates to road engineering technical field, concretely provides a kind of multifunctional modifier spraying device for improving the skid resistance of recycled mixture.The device includes controller, modifier spray head, mixing device, modifier box, sensor group and material ridge.Controller is connected with each component by electrical or wireless mode, and intelligent control system monitors road surface condition in real time, and automatically adjusts spraying amount, spraying pressure and spray head moving speed.Modifier is sprayed by spray head through pneumatic drive system, to ensure that it is evenly covered on the surface of material ridge, to enhance the bonding force of aggregate and asphalt, effectively improve the skid resistance and durability of road.The device can be compatible with existing construction equipment, with the characteristics of high efficiency, intelligentization and modularization, suitable for various pavement construction, significantly improve construction efficiency and pavement performance, with good application prospect.

Description

Technical Field

[0001] This application relates to the field of road construction technology, and in particular to a multifunctional modifier spraying device for improving the skid resistance of recycled mixtures. Background Technology

[0002] With the continuous development of road engineering, the use of recycled asphalt mixtures (RAP) has become an important means to reduce construction costs and improve resource utilization efficiency. However, recycled asphalt mixtures often face problems such as poor skid resistance and insufficient road surface friction coefficient during long-term use. This limits the application effect of recycled mixtures in certain environments, especially on wet and slippery roads or in extreme weather conditions, posing significant safety hazards.

[0003] Currently, the main technical means to improve the skid resistance of recycled asphalt mixtures is surface treatment using modifiers. Modifiers are typically used to improve the bond between asphalt and aggregates, enhancing their adhesion and skid resistance. Although existing technologies have made some progress in this area, traditional modifier spraying devices still have some problems, especially regarding spray volume, pressure, and spray uniformity. These problems prevent the modifiers from fully exerting their intended effect, affecting the skid resistance and durability of the asphalt mixture.

[0004] In the current construction process, the loosening and rakeing device loosens the road surface and forms loose ridges. Then, a heating device adjusts the height above the ground to allow the ridges to be easily absorbed, ensuring uniform heating of the asphalt mixture and reaching the appropriate construction temperature. The temperature of modified asphalt mixtures is typically above 130℃, and the temperature of ordinary asphalt mixtures is no less than 120℃, ensuring that the temperature meets construction quality standards. Next, the heating device heats the asphalt mixture to the set temperature to ensure optimal spraying results.

[0005] However, traditional spraying equipment typically relies on manual operation or preset programs to adjust the spray volume and pressure, lacking the ability to dynamically adjust to real-time road conditions. This results in imprecise control of spray volume and pressure during construction, leading to uneven spraying and thus affecting the effectiveness of the modifier and the improvement of road surface skid resistance.

[0006] Therefore, there is an urgent need for a new type of modifier spraying device that can automatically adjust the spraying volume, pressure, and nozzle movement speed according to the real-time road conditions, ensuring that the modifier is sprayed evenly and accurately onto the road surface, thereby effectively improving the skid resistance and road durability of recycled asphalt mixtures.

[0007] The multifunctional modifier spraying device of the present invention can monitor parameters such as road surface temperature, humidity, and friction coefficient in real time through an intelligent control system, and automatically adjust the spraying volume and pressure to ensure the accuracy and uniformity of modifier spraying, ultimately improving the anti-skid properties and overall performance of the road surface. Utility Model Content

[0008] The purpose of this invention is to provide a multifunctional modifier spraying device for improving the skid resistance of recycled asphalt mixtures. This device, through a rationally designed intelligent control system, a precise spraying adjustment mechanism, and a multifunctional spraying nozzle, can adjust the spraying volume, pressure, and nozzle movement speed in real time according to the actual road conditions, thereby improving the uniformity and efficiency of modifier spraying and thus enhancing the skid resistance and durability of recycled asphalt mixtures.

[0009] This device combines an intelligent control system, an automated nozzle adjustment system, real-time sensor monitoring and feedback, and a pneumatic drive system. It can dynamically adjust the modifier spraying volume based on real-time parameters such as temperature, humidity, and friction coefficient, ensuring uniform spraying of the modifier across all parts of the road surface. Through intelligent adjustment, it can adapt to different construction conditions, avoiding the uncertainties associated with manual adjustments and ensuring construction quality.

[0010] To achieve the above objectives, this utility model provides a multifunctional modifier spraying device, which mainly includes the following technical features:

[0011] The controller is characterized in that it is used to control the working state of the modifier spraying device. The controller is connected to the modifier nozzle, mixing device, sensor group, modifier material box and material ridge via electrical or wireless means, receives sensor data in real time, and adjusts the spraying volume, pressure and nozzle movement speed according to road conditions. The modifier nozzle is connected to the modifier material box via a pipeline, and the pipeline is connected to the air pressure system using a flow control valve.

[0012] The device includes a modifier container connected to a spray nozzle via a high-temperature resistant pipe and a flow control valve connected to a pneumatic system; a mixing device located in the center of the device, in contact with the material bed, and electrically connected to a controller; a sensor array installed at the bottom of the device or around the spraying device to monitor physical parameters such as road surface temperature, humidity, and friction coefficient in real time, feeding the data back to the controller; and a material bed located on the ground, formed by a loosening and rake device that loosens the road surface during construction to form a loose material bed, which serves as the base for applying the modifier. The spraying device uses an adjustment system to ensure that the spraying distance between the spray nozzle and the material bed remains consistent, guaranteeing uniform spraying of the modifier.

[0013] The nozzle sprays water via a pneumatic drive system, which includes an air compressor, an air pipe, an air valve, and a nozzle. The air pipe is connected to a flow control valve, and the air valve is controlled by a controller to adjust the opening and closing of the airflow to control the spraying pressure and flow rate of the nozzle.

[0014] The piping system between the modifier cartridge and the nozzle includes high-temperature and corrosion-resistant pipes. A flow control valve is installed inside the pipes to regulate the amount of modifier delivered to the nozzle, ensuring the stability and accuracy of the modifier during spraying.

[0015] The mixing device is in direct contact with the material bed, and the mixing device is equipped with agitator blades.

[0016] The material ridges are formed by a rake loosening device, and their height above the ground is adjusted by connecting them to a heating device to ensure that the modifier spraying device can cross the material ridges and accurately spray the modifier.

[0017] Modifiers are compounds or compositions that can form anti-hydrogen bond energy on the surface of the object to which they are applied and improve the bonding energy of the asphalt-aggregate interface, thereby enhancing the water stability, skid resistance and various road performance properties of asphalt mixtures, and thus improving the mechanical properties and durability of asphalt concrete pavements.

[0018] The spraying device, through an intelligent control system, automatically adjusts the pressure and amount of the sprayed modifier in real time according to the actual road conditions to ensure optimal spraying effect. The modifier is typically sprayed evenly onto the surface of loose aggregate using the spraying device. To ensure uniformity and spraying effect, the spraying device of this invention combines a pneumatic drive system with an intelligent control system, which can automatically adjust the spraying pressure, spray volume, and nozzle movement speed to ensure that each layer of modifier can evenly cover the aggregate surface. After spraying, the modifier reacts with the active groups on the aggregate surface, firmly adhering to the aggregate through chemical bonds. In this process, the modifier can significantly alter the microstructure of the aggregate surface, making it more suitable for chemical reaction with asphalt.

[0019] Modifiers significantly improve the bonding strength between aggregates and asphalt, allowing asphalt mixtures to maintain a high coefficient of friction even under wet conditions, thus effectively improving the road's skid resistance. Because modifiers reduce microscopic and fine-scale defects at the asphalt-aggregate interface and enhance interfacial bonding, asphalt mixtures are less susceptible to erosion from moisture, ultraviolet radiation, and other factors during long-term use, enhancing pavement durability. Modifiers also improve the bonding strength between asphalt and aggregates, thereby reducing moisture erosion at the interface and improving water stability, allowing asphalt mixtures to maintain good performance even in wet environments such as rainy days.

[0020] The sensor array collects real-time road surface condition data, including temperature, humidity, and friction coefficient. This data is transmitted wirelessly or via wired connection to the data processing unit. The data processing unit receives the real-time data from the sensor array and analyzes the current road surface condition using fuzzy control, PID control, or adaptive control algorithms. Based on this data, it calculates the optimal spraying pressure, flow rate, and nozzle movement speed for the spray modifier in real time. The control unit, based on the calculation results from the data processing unit, sends control signals to the nozzle's flow control valve, air pressure control valve, and nozzle movement motor. These control signals include: flow control signal... The system includes: a flow control valve to regulate the spray volume of the modifier; a spray pressure control signal to regulate the air pressure of the air pressure control valve; a nozzle movement speed control signal to control the speed of the nozzle's electric motor or servo motor; and a feedback adjustment mechanism including: a feedback sensor to detect information such as the road surface friction coefficient, temperature, and humidity after spraying; and feedback data processing for real-time adjustment of spray parameters, dynamically optimizing the spraying effect based on feedback data during construction. If the feedback friction coefficient does not meet the set standard, the control system will automatically increase the spray pressure or flow rate; if over-spraying occurs, the system will automatically reduce the spray volume.

[0021] The modifier spraying device is linked with the mixing device to ensure that the asphalt mixture reaches the required temperature and uniformity before spraying, and to achieve mixing of the modifier and asphalt mixture during the spraying process.

[0022] Furthermore, the asphalt interface modifier of the present invention is a chemical substance with high affinity, primarily acting on the interface between aggregate and asphalt. The modifier enhances the bonding force between aggregate and asphalt by forming chemical bonds with molecules on the aggregate surface. The modifier can form a modified film on the aggregate surface, improving the interfacial structure between asphalt and aggregate and increasing the cohesive force of the asphalt-aggregate interface. Specifically, the modifier can form anti-hydrogen bonds on the surface of the application object through anti-hydrogen bonding. These anti-hydrogen bonds have strong molecular adsorption capacity, allowing the modifier to firmly adhere to the aggregate surface and form stable chemical bonds. Simultaneously, the modifier enhances the chemical bond energy between aggregate and asphalt through chemical reaction, increasing the interfacial bonding force, resulting in stronger adhesion between asphalt and aggregate, and significantly improving the anti-skid performance of the asphalt mixture.

[0023] Furthermore, the chemical composition of modifiers exhibits high selectivity, enabling them to adapt to the bonding of different types of aggregates and asphalt. The main components of modifiers include surfactants, anti-hydrogen bonding compounds, modified polymers, antioxidants, and UV stabilizers. Surfactants can significantly reduce the surface energy of aggregate surfaces, allowing asphalt to adhere better to the aggregate surface. Common surfactants include certain long-chain fatty acid salts and organosilicon compounds. Anti-hydrogen bonding compounds can form stable hydrogen bond structures at the asphalt-aggregate interface, further enhancing the bonding force at the asphalt-aggregate interface. Modified polymers play a role in toughening and enhancing durability in modifiers; these polymers can improve the adhesion and hydrolysis resistance of the modifier, thus maintaining high performance under different environmental conditions. To improve the stability and weather resistance of modifiers during long-term use, antioxidants and UV stabilizers are typically added to reduce degradation of the modifier under high temperature and ultraviolet radiation.

[0024] Furthermore, the molecular structure of the modifier is designed with strong affinity components, enabling it to form a stable bond with the asphalt and aggregate surfaces. The modifier molecule typically contains hydrophilic groups, which can react with the chemical bonds on the aggregate surface, providing strong adsorption. The modifier also contains hydrophobic groups, which can interact with the hydrocarbon groups in the asphalt, thereby enhancing the bonding force between the asphalt and aggregate and preventing damage to the asphalt mixture from moisture or other external factors. In addition, the modifier molecule also contains some active groups, through which the modifier can form chemical cross-links at the aggregate-asphalt interface, further improving the interfacial bonding force.

[0025] This utility model has the following beneficial effects:

[0026] Firstly, the multifunctional modifier spraying device for improving the skid resistance of recycled asphalt mixtures proposed in this invention combines an intelligent control system with a pneumatic drive system. This allows for real-time adjustment of the spray volume and pressure according to actual road conditions, ensuring the modifier is sprayed evenly and precisely onto the road surface. Through precise spray control, the skid resistance of the recycled asphalt mixture is significantly improved, effectively enhancing road construction quality, especially demonstrating excellent performance in harsh environments such as high humidity and high temperature.

[0027] Secondly, this device incorporates an automated adjustment mechanism, utilizing an intelligent control system to achieve precise control of spray volume and pressure. This system can monitor data such as road surface friction coefficient, temperature, and humidity in real time, dynamically adjusting spray parameters based on data changes. This avoids the uncertainties of traditional manual adjustments, improving construction efficiency and accuracy. Furthermore, the system can adapt to different road surface conditions, resulting in more consistent spraying effects and preventing over- or under-spraying.

[0028] Furthermore, the spraying device of this invention employs a pneumatic drive system. Through the coordinated operation of the flow control valve and the pneumatic system, the spraying of the modifier remains highly efficient and stable. Compared with traditional spraying devices, this device can efficiently complete operations in multiple construction areas, reducing operational complexity and improving the overall efficiency of road construction.

[0029] Furthermore, the design of the modifier spraying device effectively improves the uniformity of the sprayed agent, ensuring that the modifier can better penetrate to the aggregate surface, enhancing the bonding force between the aggregate and asphalt, and strengthening the cohesion of the asphalt-aggregate interface. This feature makes the present invention particularly suitable for improving the skid resistance and durability of recycled asphalt mixtures, better able to cope with the challenges of high loads and slippery conditions in complex road environments, and ensure road safety during use.

[0030] Furthermore, this device is structurally designed to meet diverse construction needs, exhibiting high adaptability and flexibility. Its intelligent spraying system adjusts the spray volume and pressure based on actual road conditions and uses a real-time feedback mechanism to regulate the spraying effect, ensuring optimal results with each application. This not only improves the effectiveness of the modifier but also reduces resource waste during construction, enhancing economic efficiency.

[0031] Finally, the integration of the intelligent control system and spraying device in this invention makes the modifier spraying process more efficient and stable, ensuring quality and efficiency during construction. Especially in scenarios requiring multiple sprayings on different road surfaces, this invention provides more precise control, greatly improving construction stability and reliability, and has broad application prospects and promotional value. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments or examples of this utility model, the drawings used in the embodiments or examples will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained according to these drawings without creative effort.

[0033] Figure 1 A schematic diagram of the overall structure of a multifunctional modifier spraying device for improving the anti-skid properties of recycled mixtures;

[0034] Figure 2 A technical roadmap for a multifunctional modifier spraying device for improving the skid resistance of recycled mixtures;

[0035] Reference numerals: 1-Controller; 2-Modifier nozzle; 3-Mixing device; 4-Modifier material box; 5-Sensor group; 6-Material sump. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] See Figures 1-2 , Figure 1 A schematic diagram of the overall structure of a multifunctional modifier spraying device for improving the anti-skid properties of recycled mixtures; Figure 2 This is a technical roadmap diagram of a multifunctional modifier spraying device for improving the skid resistance of recycled mixtures; the following is a complete operational embodiment:

[0040] During the construction preparation phase, diesel fuel injection into the heating units is the primary step to ensure smooth construction. To ensure the normal operation of each unit, diesel fuel injection must be completed two hours before construction each day. During diesel fuel injection, a warning area is set up, a safety warning vehicle is positioned behind the unit, and safety personnel are dispatched to direct operations. During injection, dripping and spillage must be avoided to prevent road surface contamination. Afterward, the operator checks whether the heating width of the heating unit is compatible with the construction width and adjusts the width of the air boxes and the spacing of the air lines of each heating device according to the road width to ensure efficient operation. The supervisor directs the units according to the actual working conditions to ensure that the equipment enters the site in an orderly manner. During the construction preparation phase, if there are defects on the road surface that cannot be treated by thermal recycling technology, they must be addressed in advance. When confirming the heating location, the operator and technician consult to determine the starting heating position and ensure that the heating temperature is consistent with the construction requirements. Next, the road surface heating begins. The three heaters are arranged sequentially with the initial pit as the reference point. The heating devices are started, the temperature is set to 350℃, and in-situ heating is initiated, reaching the set temperature in approximately 10 minutes. After reaching the set temperature, continue heating the road surface for another 5 minutes. After each heating unit completes its cycle, the technician monitors and records the temperature to ensure the surface temperature meets requirements. The rake loosening device then loosens the road surface and forms loose ridges, and the heating device adjusts its height above the ground to enter the ridges. The preheating phase of the rake loosening device also occurs during this time. Near the end of the preheating phase, the heating device of the rake loosening device is ignited, with a set temperature of 200℃ and an estimated time to reach that temperature of 8 minutes. During the preheating phase, the rake loosening device heats the pothole and surrounding road surface and evenly spreads emulsified asphalt into the pothole. Next, the rake loosening device begins to be deployed. The three heaters are moved back to the starting pothole, ensuring the road surface is softened and reaches a surface temperature of 160℃. The rake loosening device is lowered into the starting pothole and activated, ensuring the heating device temperature is set to 550℃. The working speed is adjusted according to the ambient temperature and road conditions, and construction begins. The heated rake continuously heats and maintains the surface temperature, forming loose material ridges. The temperature of these ridges should be controlled above 120℃, and the temperature of the underlying layer should be controlled above 85℃ for ordinary asphalt pavement and above 100℃ for modified asphalt pavement to facilitate thermal bonding of the upper and middle layers. The thickness of the loosened material should meet design requirements. During the heating process, the rotating rake device of the heating unit is activated. The temperature of modified asphalt mixture is generally not lower than 130℃, and the temperature of ordinary asphalt mixture is generally not lower than 120℃. This ensures uniform heating of the asphalt mixture and that the temperature meets construction quality requirements. In the initial stage of heater preheating, the heating device of the regenerator tank in the mixer is ignited, with a set temperature of 150℃ and an estimated time to reach the desired temperature of 50 minutes. Near the end of heater preheating, the heating device of the mixer is ignited, with a set temperature of 200℃ and an estimated time to reach the desired temperature of 8 minutes. At this point, the mixer starts working, adding an appropriate amount of new asphalt mixture to the receiving hopper in advance, and adjusting the ground clearance of the receiving hopper device and heating device of the mixer to ensure that the mixer can move smoothly across the material ridge.

[0041] After the mixer begins initial operation, the receiving hopper is set to a floating state, the hopper conveying device is activated to add grading materials to the ridge, and the modifier spraying device is started. The multi-functional modifier spraying device is a modular unit that can be easily integrated with existing construction equipment. This device includes nozzles 2, a pneumatic drive system, a flow control valve, and a pneumatic control valve, which can adjust the spray volume, spray pressure, and nozzle movement speed according to real-time road data and construction requirements. The intelligent control system 1 is the core of this device, monitoring road conditions in real time through sensor group 5 and feeding the data back to the data processing unit.

[0042] First, controller 1 acquires real-time data on road surface temperature, humidity, and friction coefficient through its connection with sensor group 5. This data is analyzed by the data processing unit, which uses fuzzy control, PID control, or adaptive control algorithms to calculate suitable spraying parameters for the current road surface. Based on the calculation results, the control unit sends signals to adjust the spray volume, spray pressure, and nozzle movement speed of nozzle 2, ensuring that the modifier is sprayed evenly and accurately onto the surface of the ridge 6.

[0043] The modifier is delivered from the modifier cartridge 4 to the nozzle 2 via pipeline, and a pneumatic drive system ensures stable and uniform pressure during spraying. The nozzle 2, based on real-time adjustments to the spray pressure and flow rate, precisely controls the amount of modifier sprayed on each section of the road surface, ensuring complete coverage of the aggregate surface and forming a good interfacial bond. This enhances the bond between the aggregate and asphalt, thereby improving the road's anti-skid properties.

[0044] The feedback mechanism during the spraying process also plays a crucial role. After spraying is completed, sensor group 5 monitors the spraying effect through feedback data and transmits the feedback data to the control unit. The data processing unit further optimizes the spraying volume and spraying pressure based on the feedback data to ensure uniform spraying of the modifier and avoid any localized under- or over-spraying.

[0045] The mixing unit 3 works in conjunction with the spraying unit during the spraying process to ensure that the aggregate piles 6 are evenly turned over during spraying, allowing the modifier to fully penetrate to the surface of the aggregate and react with the asphalt to enhance its adhesion. The mixing unit 3 continues to adjust its travel speed to ensure that each layer of aggregate piles 6 is accurately sprayed with modifier, avoiding uneven or excessive spraying.

Claims

1. A multifunctional modifier spraying device for improving the anti-skid properties of recycled mixtures, characterized in that, include: The controller (1) is used to control the working status of the modifier spraying device. The controller is connected to the modifier nozzle (2), mixing device (3), sensor group (5), modifier material box (4) and material mound (6) by electrical and wireless means. The modifier nozzle (2) is connected to the modifier material box (4) through a pipe. The pipe is connected to the air pressure system using a flow control valve. The modifier material box (4) is connected to the nozzle (2) through a pipe. The modifier material box (4) is connected to the air pressure system through a flow control valve. The mixing device (3) is in contact with the material mound (6) and is connected to the controller (1) by electrical connection. The sensor group (5) feeds back data to the controller (1). The material mound (6) is formed by a rake device. The material mound (6) serves as the base for applying the modifier.

2. The multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 1, characterized in that: The nozzle (2) sprays through a pneumatic drive system, which includes a compressed air compressor, an air pipe, an air valve and a nozzle. The air pipe is connected to a flow control valve, and the air valve adjusts the opening and closing of the airflow through a controller (1).

3. The multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 1, characterized in that: The piping system between the modifier cartridge (4) and the nozzle (2) includes high-temperature resistant and corrosion-resistant pipes.

4. The multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 1, characterized in that: The mixing device (3) is in direct contact with the material pile (6), and the mixing device (3) is equipped with turning blades.

5. A multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 1, characterized in that: The modifier is a compound or composition capable of forming anti-hydrogen bond energy on the surface of the object to which it is applied and improving the interfacial bonding energy of the asphalt mixture.

6. A multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 1, characterized in that: The controller (1) includes an intelligent control system.

7. A multifunctional modifier spraying device for improving the skid resistance of recycled mixtures according to claim 6, characterized in that: The intelligent control system includes: Sensor group (5); data processing unit, used to receive real-time data from sensor group (5), specifically using fuzzy control algorithm, PID control algorithm and adaptive control algorithm to analyze the current road surface condition; control unit, the control unit sends control signals to the flow control valve, air pressure control valve and nozzle moving motor of the nozzle according to the calculation results of the data processing unit; The control signals specifically include: flow control signal: controlling the opening of the flow control valve to adjust the spray volume of the modifier, the signal is a PWM signal; spray pressure control signal: controlling the air pressure of the air pressure control valve; nozzle moving speed control signal: controlling the running speed of the electric motor or servo motor of the nozzle, the signal is a PWM signal or a digital switch signal. The feedback adjustment mechanism includes: a feedback sensor for detecting the road surface friction coefficient, temperature, and humidity information after spraying; and feedback data processing.

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