Road asphalt paving device and paving method thereof

Abstract

The invention relates to the field of road paving, in particular to a road asphalt paving device and a paving method thereof.The road asphalt paving device comprises a device frame, a loading mechanism, a ramming mechanism, a stirring mechanism, a compacting mechanism and an intelligent controller, by integrating gradient, material viscosity, paving thickness and other multi-dimensional data, the optimal discharging speed can be dynamically calculated, and the paving efficiency is improved. And dynamic balance is kept between the sliding speed and the actual sliding speed, so that the problem of non-uniform discharging in a traditional mode is solved, the phenomenon of material accumulation or landslide caused by mismatching of the speed is avoided, and the cleanliness and the safety of a working site are ensured. In addition, the balanced discharging speed means that the stability of the materials in the conveying process is enhanced, the accidental sliding risk caused by the gravity effect is reduced, and a safer working environment is provided for operators.

Description

Technical Field

[0001] The present invention relates to the field of road paving, and specifically to a road asphalt paving device and a paving method thereof. Background Art

[0002] In the existing road asphalt paving technology, there are many deficiencies in traditional paving devices and methods. First of all, traditional paving devices often lack intelligent control means, resulting in the inability to flexibly adjust according to the actual conditions of the road, such as slope, road surface width, etc. during the paving process, thus easily causing uneven discharge problems. When the paving device operates on a slope, due to the action of gravity, the asphalt mixture is likely to accumulate in places with a larger slope, while there may be insufficient paving in places with a smaller slope or flat areas. This not only affects the flatness of the road surface but also may lead to material waste.

[0003] Secondly, when traditional paving devices crush stones and stir asphalt mixtures, they often adopt fixed process parameters and cannot be dynamically adjusted according to the actual properties of the mixture, such as viscosity, particle size, etc., resulting in poor uniformity and stability of the mixture. This not only affects the paving quality but also may increase the difficulty and cost of subsequent compaction work. In addition, traditional paving methods also have the problem of unsatisfactory compaction effects. Due to the limited technical level of compaction equipment, it is often impossible to accurately control compaction according to the actual situation of the road surface, resulting in insufficient density and durability of the road surface, and prone to quality problems such as cracking and depression. To sum up, the existing road asphalt paving devices and methods have obvious deficiencies in terms of intelligence, flexibility, and compaction effects, and it is difficult to meet the requirements of modern road construction for high quality, high efficiency, and low cost. Therefore, in order to solve the above problems and improve the quality and efficiency of road paving, the present invention proposes a road asphalt paving device and a paving method. Summary of the Invention

[0004] In order to solve the problems of uneven discharge and the problem of material slope accumulation caused by the influence of gravity on the sliding of the paving mixture on the road surface in the above-mentioned existing technology, the first object of the present invention is to provide a road asphalt paving device, which controls the asphalt paving device to adjust the feeding particle size and discharge speed through an intelligent controller, effectively improving the problem of uneven paving of the mixture on the slope.

[0005] The second object of the present invention is to provide a road asphalt paving method, which solves the problem of material waste caused by using mechanical leveling of asphalt mixture in the existing paving method by setting the feeding particle size and the discharge speed according to the slope.

[0006] In order to achieve the above object, the solution provided by the present invention is: A road asphalt paving device, comprising: Device frame, including a frame body and a fixed table, the fixed table is fixedly connected to the frame body; Feeding mechanism, including a mixture storage tank and a discharge pipe, the mixture storage tank is fixedly connected to the frame body, and the discharge pipe is arranged at the bottom of the mixture storage tank; Material striking mechanism, including a feeding crushing jaw crusher and a distributing plate, the feeding crushing jaw crusher is arranged in the mixture storage tank, and the distributing plate is arranged on the side wall of the mixture storage tank; the mixture storage tank is fixedly connected to the fixed table; Mixing mechanism, including a mixing agitator and a rotating shaft, both ends of the rotating shaft are arranged on the inner side wall of the mixture storage tank, and the mixing agitator is fixedly connected to the rotating shaft; Compacting mechanism, including a compacting roller, a vibrator and a connecting shaft, the connecting shaft is fixed to the rear side of the device frame in the traveling direction, the compacting roller is nested and connected to the connecting shaft, and the vibrator is connected to the compacting roller; Intelligent controller, used to send control signals to the road asphalt laying device. Through the coordinated control of the asphalt laying device by the intelligent controller, the automation and high efficiency of the asphalt laying operation are realized, and the material waste and pavement unevenness problems in the asphalt laying operation process are reduced.

[0007] As a further improvement of the present invention, the mixture storage tank is also provided with a heating plate, and the heating plate is fixed to the inner wall of the mixture storage tank. By fixedly installing the heating plate on the inner wall of the mixture storage tank and preheating and insulating the mixture through the heating plate, it can ensure that the asphalt mixture always remains within the optimal construction temperature range during the laying process. This helps to improve the fluidity and adhesiveness of the mixture, reduce the segregation phenomenon during the laying process, and improve the flatness and density of the road surface; the heating function enables the mixture to maintain a relatively high temperature during storage and transportation, reducing the time for secondary heating of the mixture at the construction site, thereby accelerating the overall construction progress.

[0008] As a further improvement of the present invention, the feeding crushing jaw crusher is also provided with a fixed frame, a jaw plate spacing adjusting component, an adjusting jaw plate and a fixed jaw plate. The fixed frame is fixedly connected to the inner bottom of the mixture storage tank, the fixed jaw plate is arranged on the fixed frame, the jaw plate spacing adjusting component is arranged on the inner wall of the mixture storage tank, and the adjusting jaw plate is installed on the jaw plate spacing adjusting component. By adjusting the jaw plate spacing, it can ensure that the feeding crushing jaw crusher effectively crushes mixtures with different particle sizes and hardnesses, and crushes stones with different particle sizes according to different laying surfaces, which helps to improve the crushing efficiency, reduce the energy consumption and wear during the crushing process, and moreover, the improved feeding crushing jaw crusher can crush the mixture more evenly, reducing the number of large particles and unbroken particles.

[0009] As a further improvement of the present invention, the discharge pipe is further provided with an adjusting rod and a flow regulating valve. One end of the adjusting rod is arranged at the pipe orifice of the discharge pipe and is connected to the discharge pipe by a rotating shaft, and the other end is fixedly connected to the flow regulating valve. By setting the combination of the adjusting rod and the flow regulating valve, precise control of the flow rate of the asphalt mixture in the discharge pipe can be achieved, the flow rate can be flexibly adjusted, the uniformity and quality of the paving can be ensured, and the further improved design of the discharge pipe significantly improves the accuracy and flexibility of the flow control, improves the paving quality, and also reduces the operation difficulty and cost.

[0010] As a further improvement of the present invention, the intelligent controller includes a material distribution control module, a heating control module, a stirring control module, a discharge control module, and a compaction control module. The material distribution control module is electrically connected to the material distribution and crushing jaw crusher; the heating control module is electrically connected to the heating plate; the stirring control module is electrically connected to the mixing stirrer; the discharge control module is electrically connected to the discharge pipe; the compaction control module is electrically connected to the vibrator.

[0011] By integrating multiple control modules, the intelligent controller realizes the automatic control of each link in the paving process. The precise control enables each link such as the crushing, heating, stirring, discharging, and compaction of the mixture to achieve the best effect, which helps to improve the uniformity, density, and durability of the paving layer, thereby enhancing the overall construction quality.

[0012] To achieve the above object, the present invention also provides a road asphalt paving method, which is applicable to the above-mentioned road asphalt paving device, and includes: S1: Add stones to the loading box, and control the material distribution and crushing jaw crusher to break the stones to obtain mixed crushed stones through the material distribution control module; S2: Add asphalt to the mixture storage tank, and turn on the heating plate to heat and keep the asphalt warm; S3: Distribute the mixed crushed stones to the mixture storage tank, and stir the mixed crushed stones and asphalt to obtain asphalt mixture; S4: According to the road slope value, control the road paving device to change the discharge speed of the discharge port, and move forward for paving and primary compaction; S5: Close the discharge port, and control the vibrator of the compaction mechanism to change the vibration frequency to perform secondary compaction and final compaction on the road.

[0013] The whole process from stone crushing, asphalt heating, mixing to paving and compaction is realized with full automation and intelligent control by using an intelligent controller. The intelligent controller controls the particle size of the feeding material and the discharging speed of the pavement laying device. By using an intelligent control method, the cutter distance of the feeding mechanism is controlled, and the mineral material can be cut according to the different fine particle sizes of each layer of the mixture. By calculating and adjusting the discharging speed according to the slope, material viscosity and paving thickness, the discharging speed and the sliding speed can be balanced, avoiding uneven discharging and the slope accumulation of the material caused by the influence of gravity on the sliding of the material.

[0014] As a further improvement of the present invention, the S4 is provided with: , where v2 is the discharging speed, m is the mass of asphalt mixture required per square centimeter of the road cross-section, k is the viscosity of the asphalt mixture, and θ is the road slope angle value. By calculating the discharging speed, the discharging speed of the road asphalt laying device is dynamically balanced with the downward sliding speed of the asphalt affected by gravity, so that the asphalt mixture can be evenly paved on the laying road surface, avoiding the accumulation of asphalt material and the problem of raw material waste caused by mechanically paving the asphalt material.

[0015] As a further improvement of the present invention, the S5 sets corresponding vibration frequencies according to the number of times of compacting the road surface to compact the asphalt mixture. By adjusting the vibration frequency, the road surface compaction effect can be improved, and the density and durability of the road surface can be enhanced.

[0016] As a further improvement of the present invention, the road asphalt laying method conducts three-layer road laying, and the laying layers are respectively a cushion layer, a base layer and a surface layer. When laying each layer, the S1 obtains the mixed crushed stones with corresponding particle sizes. By selecting the particle sizes of the mixed crushed stones, the material composition and structure of different laying layers can be optimized, and the overall bearing capacity and service life of the road can be improved.

[0017] As a further improvement of the present invention, in the S1, the feeding control module respectively selects and controls the jaw plate spacing adjustment component of the jaw crusher for the cushion layer, the base layer and the surface layer, and adjusts the spacing between the adjustable jaw plate and the fixed jaw plate to the first-stage jaw spacing, the second-stage jaw spacing and the third-stage jaw spacing, so as to adjust the particle fineness of the mixed crushed stones for different laying layers.

[0018] By automatically selecting and adjusting the jaw plate spacing of the feeding crusher according to the differences of laying layers such as the cushion layer, the base layer and the surface layer, the fine adjustment of the particle fineness of the mixed crushed stones can be realized.

[0019] The beneficial effects of the present invention are: (1) By using an intelligent controller to precisely control the jaw spacing of the feeding mechanism, the particle precision in the process of processing mixed stone materials is improved, thus achieving uniform crushed stones and enhancing the consistency of the mixed stone materials. Moreover, by using the intelligent controller for intelligent crushing of mixed stone materials, the efficiency of road asphalt paving operations is improved.

[0020] (2) By integrating multi-dimensional data such as slope, material viscosity, and paving thickness, the present invention can dynamically calculate the optimal discharge speed and maintain a dynamic balance with the actual sliding speed, solving the problem of uneven discharge in the traditional method and avoiding the phenomena of material accumulation or landslide caused by speed mismatch, thereby ensuring the cleanliness and safety of the operation site. The balanced discharge speed also means enhanced stability of the material during transportation, reducing the risk of accidental slipping caused by gravity and providing a safer working environment for operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a road asphalt paving device in the present invention; Figure 2 is a flowchart of a road asphalt paving method in the present invention.

[0022] BRIEF DESCRIPTION OF THE DRAWINGS: 1. Device frame; 11. Frame body; 12. Fixed table; 2. Loading mechanism; 21. Mixing material storage tank; 22. Discharge pipe; 3. Feeding mechanism; 31. Dividing and crushing jaw device; 311. Adjusting jaw plate; 4. Stirring mechanism; 41. Mixing stirrer; 5. Compacting mechanism; 51. Compacting roller; 52. Connecting shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Hereinafter, specific embodiments of the present invention will be described in detail. It should be noted that the embodiments described here are only some embodiments of the present invention, not all embodiments. Based on the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0024] A first embodiment of the present invention provides a road asphalt paving device, comprising: A device frame, including a frame body and a fixed table, the fixed table is fixedly connected to the frame body; the frame body serves as the basic support structure of the entire device, responsible for carrying all other mechanisms and components, and the fixed table is installed on the frame body for installing the feeding mechanism to facilitate the feeding mechanism to discharge mixed crushed stones to the loading mechanism.

[0025] The feeding mechanism includes a mixture storage tank and a discharge pipe. The mixture storage tank is fixedly connected to the frame body and is used to store the asphalt mixture to be laid. The discharge pipe is arranged at the bottom of the mixture storage tank and is used to control the flow rate and speed of the asphalt mixture to ensure uniform discharging.

[0026] The material feeding mechanism includes a material dividing and crushing jaw crusher and a material dividing plate. The material dividing and crushing jaw crusher is arranged inside the mixture storage tank and is used to crush and preliminarily divide the mixture entering the mixture storage tank to improve the uniformity and laying quality of the mixture. The material dividing plate is arranged on the side wall of the mixture storage tank and is used to guide the flow direction of the mixture and control the discharging speed of the material feeding mechanism into the mixture storage tank. The mixture storage tank is fixedly connected to the fixed platform and is used to temporarily store the mixed gravel.

[0027] The stirring mechanism includes a mixing agitator and a rotating shaft. Both ends of the rotating shaft are arranged on the inner side wall of the mixture storage tank. The mixing agitator is fixedly connected to the rotating shaft and is driven by the rotating shaft to fully stir the asphalt mixture in the mixture storage tank to ensure uniform mixing of each component and improve the laying effect. The compaction mechanism includes a compaction roller, a vibrator and a connecting shaft. The connecting shaft is fixed to the rear side of the device frame in the traveling direction. The compaction roller is nested and connected to the connecting shaft. The compaction roller is nested and connected to the connecting shaft, and compacts the laid asphalt through the traveling movement of the device frame to ensure the flatness and density of the road surface. The vibrator is connected to the compaction roller to enhance the compaction effect by generating vibration force, and adjusts the vibration frequency according to the number of compaction times to reduce bubbles and voids and improve the durability of the road surface. The intelligent controller is used to send control signals to the road asphalt laying device. By receiving external instructions or internal sensor signals, it sends control signals to each mechanism and component to achieve precise and efficient asphalt laying operations.

[0028] In this embodiment, referring to Figure 1 As shown, the mixture storage tank is also provided with a heating plate. The heating plate is fixed to the inner wall of the mixture storage tank. The heating plate is made of a material with high temperature resistance and corrosion resistance and is installed on the inner wall of the mixture storage tank. A temperature sensor is installed inside the mixture storage tank to monitor the temperature of the mixture in real time and transmit the data to the intelligent controller. The intelligent controller automatically adjusts the power of the heating plate according to the preset temperature range and the current temperature data to maintain the mixture within the optimal construction temperature range.

[0029] A heating plate is fixedly installed on the inner wall of the mixture storage tank. The mixture is preheated and insulated by the heating plate, which can ensure that the asphalt mixture always remains within the optimal construction temperature range during the paving process. This helps to improve the fluidity and adhesiveness of the mixture, reduce the segregation phenomenon during paving, and improve the smoothness and density of the road surface; the heating function enables the mixture to maintain a relatively high temperature during storage and transportation, reducing the time for secondary heating of the mixture at the construction site, thus accelerating the overall construction progress.

[0030] In this embodiment, referring to Figure 1 As shown, the feeding and crushing jaw device is further provided with a fixing frame, a jaw plate spacing adjusting component, an adjusting jaw plate and a fixed jaw plate. The fixing frame is fixedly connected to the inner bottom of the mixture storage tank. The fixing frame provides stable support for the feeding and crushing jaw device, ensuring the stability of the operation of the feeding and crushing jaw device. The fixed jaw plate is arranged on the fixing frame and cooperates with the adjusting jaw plate to realize the crushing and feeding of the mixture entering the mixture storage tank. The jaw plate spacing adjusting component is arranged on the inner wall of the mixture storage tank, and the jaw plate spacing adjusting component can flexibly adjust the spacing between the adjusting jaw plate and the fixed jaw plate. By adjusting the spacing, effective crushing and feeding of mixtures with different particle sizes and hardnesses can be achieved. The adjusting jaw plate is installed on the jaw plate spacing adjusting component, and the adjusting jaw plate and the fixed jaw plate are arranged opposite to each other to form a crushing chamber. During operation, the adjusting jaw plate generates relative movement with the fixed jaw plate under the drive of the jaw plate spacing adjusting component, so as to crush and feed the mixture entering the crushing chamber.

[0031] By adjusting the jaw plate spacing, it can be ensured that the feeding and crushing jaw device effectively crushes mixtures with different particle sizes and hardnesses, and crushes stones with different particle sizes according to different paving surfaces, which helps to improve the crushing efficiency, reduce the energy consumption and wear during the crushing process. Moreover, the improved feeding and crushing jaw device can crush the mixture more evenly, reducing the number of large particles and unbroken particles.

[0032] In this embodiment, referring to Figure 1 As shown, the discharge pipe is further provided with an adjusting rod and a flow regulating valve. One end of the adjusting rod is arranged at the pipe orifice of the discharge pipe and is connected to the discharge pipe by a rotating shaft, and the other end is fixedly connected to the flow regulating valve. An adjusting rod is arranged at the pipe orifice of the discharge pipe. One end of the adjusting rod is connected to the discharge pipe through a rotating shaft. The design of the rotating shaft allows the adjusting rod to perform rotational movement at the pipe orifice of the discharge pipe without affecting the main structure of the discharge pipe. The other end of the adjusting rod is fixedly connected to the flow regulating valve. By rotating the adjusting rod, the opening degree of the flow regulating valve can be indirectly controlled, so as to achieve precise adjustment of the flow rate of the asphalt mixture in the discharge pipe.

[0033] By setting the combination of the adjusting rod and the flow regulating valve, precise control of the flow rate of the asphalt mixture in the discharge pipe can be achieved, flexibly adjusting the flow rate to ensure the uniformity and quality of the paving. The further improved design of the discharge pipe significantly improves the accuracy and flexibility of flow control, enhances the paving quality, and also reduces the operation difficulty and cost.

[0034] In this embodiment, referring to Figure 1 as shown, the intelligent controller includes a material distribution control module, a heating control module, a mixing control module, a discharge control module, and a compaction control module. The material distribution control module is electrically connected to the material distribution and crushing jaw crusher; the heating control module is electrically connected to the heating plate; the mixing control module is electrically connected to the mixing agitator; the discharge control module is electrically connected to the discharge pipe; the compaction control module is electrically connected to the vibrator.

[0035] The material distribution control module is electrically connected to the material distribution and crushing jaw crusher, responsible for controlling actions such as the opening and closing of the jaw crusher and the adjustment of the jaw plate spacing. By receiving signals from sensors, the material distribution control module can precisely control the crushing and material distribution process of the mixture, ensuring that the particle size distribution and crushing effect of the mixture meet the construction requirements.

[0036] The heating control module is electrically connected to the heating plate, responsible for controlling the heating power and temperature of the heating plate. By real-time monitoring the temperature in the storage tank and comparing it with the preset temperature range, the heating control module can automatically adjust the power of the heating plate to maintain the mixture within the optimal construction temperature range, which helps to improve the fluidity and adhesiveness of the mixture and ensure the paving quality.

[0037] The mixing control module is electrically connected to the mixing agitator, responsible for controlling the mixing speed and time of the agitator. By adjusting the rotation speed and mixing time of the agitator, the mixing control module can ensure that the mixture is fully mixed and evenly distributed during the mixing process, improving the uniformity and stability of the mixture.

[0038] The discharge control module is electrically connected to the discharge pipe, responsible for controlling the flow rate and speed of the discharge pipe. By adjusting the opening degree and rotation speed of the flow regulating valve, the discharge control module can precisely control the flow rate and flow velocity of the mixture in the discharge pipe, ensuring the uniformity and continuity of the paving.

[0039] The compaction control module is electrically connected to the vibrator, responsible for controlling the vibration frequency and amplitude of the vibrator; the compaction control module can adjust the vibration parameters of the vibrator according to the properties of the mixture and the paving requirements to achieve effective compaction of the paving layer and improve the density and durability of the road surface.

[0040] By integrating multiple control modules, the intelligent controller realizes automated control of each link in the paving process. Precise control enables each link of the mixture, such as crushing, heating, mixing, discharging and compacting, to achieve the best effect, which helps to improve the uniformity, density and durability of the paving layer, thereby improving the overall construction quality.

[0041] A second embodiment of the present invention provides a road asphalt paving method, comprising: S1: Add stones into the loading box, and control the material distribution and crushing jaws through the material distribution control module to break the stones into mixed gravel. The material distribution control module in the intelligent controller can accurately control the opening and closing of the material distribution and crushing jaws and the jaw plate spacing to break the stones into mixed gravel that meets the requirements, ensuring that the particle size distribution of the mixed gravel is uniform, providing a stone basis for subsequent mixing with asphalt.

[0042] S2: Add asphalt to the mixture storage tank, turn on the heating plate to heat and insulate the asphalt, and monitor and adjust the temperature according to the heating control module in the intelligent controller to ensure that the asphalt is kept within the optimal construction temperature range, thereby ensuring the fluidity and adhesion of the asphalt and facilitating its full mixing with the mixed gravel.

[0043] S3: The mixed crushed stone is distributed to the mixture storage tank, and the mixing agitator is started through the mixing control module in the intelligent controller. The agitator fully mixes the mixed crushed stone and asphalt until a uniform asphalt mixture is obtained.

[0044] S4: According to the road design requirements and the actual slope value, the discharge speed of the discharge port is adjusted through the discharge control module in the intelligent controller, and the road paving device is started to move forward along the predetermined route for paving. During the paving process, the compaction mechanism of the device is used for initial compaction to improve the density and stability of the paving layer.

[0045] S5: Close the discharge port and re-compact and final compact the road. When a section of road is paved, close the discharge port in time to prevent the mixture from overflowing. The vibration frequency of the vibrator is adjusted through the compaction control module in the intelligent controller to re-compact and final compact the paved layer, which improves the density and durability of the road surface and ensures the final paving quality.

[0046] The whole process from stone crushing, asphalt heating, mixing to paving and compaction is realized with full automation and intelligent control by using an intelligent controller. The intelligent controller controls the particle size of the feeding material and the discharging speed of the road paving device. By using an intelligent control method, the cutter distance of the feeding mechanism is controlled, and the mineral materials can be cut according to the different fine particle sizes of each layer of the mixture. By calculating and adjusting the discharging speed according to the slope, the viscosity of the material and the paving thickness, the discharging speed and the sliding speed can be balanced, avoiding uneven discharging and the accumulation of materials on the slope caused by the influence of gravity on the sliding of the materials.

[0047] In this embodiment, referring to Figure 2 as shown, the S4 is provided with: , where v2 is the discharging speed, m is the mass of asphalt mixture required per square centimeter of the road cross-section, k is the viscosity of the asphalt mixture, and θ is the angle value of the road slope.

[0048] By calculating the discharging speed, the discharging speed of the road asphalt paving device is dynamically balanced with the downward sliding speed of the asphalt affected by gravity, so that the asphalt mixture can be evenly paved on the paving road surface, avoiding the accumulation of asphalt materials and the problem of raw material waste caused by mechanically paving the asphalt materials.

[0049] In this embodiment, referring to Figure 2 as shown, the S5 sets the corresponding vibration frequency according to the number of times of compacting the road surface to compact the asphalt mixture.

[0050] In the initial compaction stage, the asphalt mixture is just paved on the road surface, and a large vibration energy is required to initially stabilize the mixture and discharge the air and excess moisture in it. Therefore, a higher vibration frequency should be set in this stage to quickly achieve the initial compaction effect; the recompaction stage is carried out after the initial compaction, and the purpose is to further improve the density and uniformity of the road surface. In the recompaction stage, the vibration frequency can be appropriately reduced, but sufficient vibration energy should be maintained to ensure the close contact and combination between the mixture particles; the final compaction stage is the last stage of compaction, and the main purpose is to eliminate the micro-cracks and unevenness on the road surface and make the road surface reach the final smoothness and density. In the final compaction stage, the vibration frequency should be continuously reduced, and a low-amplitude vibration mode should be adopted to avoid over-vibrating and damaging the already compacted road surface. By adjusting the vibration frequency, the road compaction effect can be improved, and the density and durability of the road surface can be enhanced.

[0051] In this embodiment, referring to Figure 2 as shown, the road asphalt paving method is used to lay three layers of the road, and the paving layers are the cushion layer, the base layer and the surface layer respectively. When laying each layer, the S1 obtains the mixed crushed stones with the corresponding particle size.

[0052] When laying the cushion layer, the jaw plate spacing of the feeding and crushing jaw crusher is in the maximum state, and the crushing force is moderate, so as to obtain mixed crushed stones with larger particle sizes, which are used to disperse the load, drain water and prevent the subgrade soil from squeezing into the pavement structure layer; when laying the base course, the jaw plate spacing is adjusted to a moderate state, and the crushing force is large, so as to obtain mixed crushed stones with moderate particle sizes and higher strength, which serve as the main load-bearing layer of the road structure; when laying the surface course, the jaw plate spacing of the feeding and crushing jaw crusher is in the minimum state, and the crushing force is moderate, avoiding the complete pulverization of the stones due to a large crushing force. The surface course directly bears the vehicle load and the influence of the natural environment. Therefore, the laying quality of the surface course not only affects the flatness and driving comfort of the road, but also is related to the aesthetics and durability of the road. By optimizing the material composition and structure of different laying layers, the overall bearing capacity and service life of the road are improved.

[0053] In this embodiment, referring to Figure 2 As shown, in S1, the feeding control module respectively selects and controls the jaw plate spacing adjusting component of the feeding and crushing jaw crusher according to whether the laying layer is a cushion layer, a base course or a surface course, and adjusts the spacing between the adjusting jaw plate and the fixed jaw plate to the first-stage jaw spacing, the second-stage jaw spacing and the third-stage jaw spacing, so as to adjust the particle fineness of the mixed crushed stones for different laying layers.

[0054] The feeding control module intelligently identifies the current layer to be laid, that is, the cushion layer, the base course or the surface course, through the sensors integrated in the laying equipment or the user input interface. According to the identified laying layer, the feeding control module selects the corresponding jaw plate spacing adjusting component; when laying the cushion layer, the feeding control module adjusts the spacing between the adjusting jaw plate and the fixed jaw plate to the first-stage jaw spacing to produce mixed crushed stones with larger particle sizes to meet the drainage and stability requirements of the cushion layer; when laying the base course, the feeding control module adjusts the spacing to the second-stage jaw spacing to produce mixed crushed stones with moderate particle sizes to ensure the bearing capacity and stability of the base course; when laying the surface course, the feeding control module further reduces the spacing to the third-stage jaw spacing to produce mixed crushed stones with smaller particle sizes, which form a smooth and dense surface layer after being mixed with asphalt.

[0055] By automatically selecting and adjusting the jaw plate spacing of the feeding and crushing jaw crusher according to different laying layers such as the cushion layer, the base course and the surface course, the fine adjustment of the particle fineness of the mixed crushed stones is realized.

[0056] This embodiment proposes a road asphalt laying device and an asphalt laying method. By using an intelligent control method to control the knife distance of the feeding mechanism, the mineral materials can be cut according to the different fineness of each layer of mixture; by calculating and adjusting the discharging speed according to the slope, material viscosity and paving thickness, the discharging speed and the sliding speed can be balanced, avoiding the problems of uneven discharging and the accumulation of materials on the slope caused by the influence of gravity on the sliding of the materials.

[0057] The basic features, principles, and advantages of the present invention have been shown and described above. It should be noted that the present invention is not limited by the above embodiments, which are only partial embodiments. Without departing from the spirit and scope of the present invention, several improvements and supplements made are regarded as the protection scope of the present invention.

Claims

1. A road asphalt paving device, characterized in that, Comprising: A device frame, including a frame body and a fixed platform, the fixed platform being fixedly connected to the frame body; A loading mechanism, including a mixed material storage tank and a discharge pipe, the mixed material storage tank being fixedly connected to the frame body, and the discharge pipe being disposed at the bottom of the mixed material storage tank; A material hitting mechanism, including a material distributing and crushing jaw crusher and a material distributing plate, the material distributing and crushing jaw crusher being disposed inside the mixed material storage tank, and the material distributing plate being disposed on the side wall of the mixed material storage tank; the mixed material storage tank is fixedly connected to the fixed platform; A stirring mechanism, including a mixing agitator and a rotating shaft, both ends of the rotating shaft being disposed on the inner side wall of the mixed material storage tank, and the mixing agitator being fixedly connected to the rotating shaft inside; A compaction mechanism, including a compaction roller, a vibrator, and a connecting shaft, the connecting shaft being fixed to the rear side of the device frame in the traveling direction, the compaction roller being nested and connected to the connecting shaft, and the vibrator being connected to the compaction roller; An intelligent controller for sending control signals to the road asphalt paving device.

2. The road asphalt paving device according to claim 1, characterized in that, The mixed material storage tank is further provided with a heating plate, and the heating plate is fixed to the inner wall of the mixed material storage tank.

3. The road asphalt laying device according to claim 1, characterized in that, The material distributing and crushing jaw crusher is further provided with a fixing frame, a jaw plate spacing adjusting component, an adjusting jaw plate, and a fixed jaw plate, the fixing frame being fixedly connected to the inner bottom of the mixed material storage tank, the fixed jaw plate being disposed on the fixing frame, the jaw plate spacing adjusting component being disposed on the inner wall of the mixed material storage tank, and the adjusting jaw plate being installed on the jaw plate spacing adjusting component.

4. A road asphalt paving device according to claim 1, characterized in that, The discharge pipe is further provided with an adjusting rod and a flow regulating valve, one end of the adjusting rod being disposed at the pipe orifice of the discharge pipe and connected to the discharge pipe by a rotating shaft, and the other end being fixedly connected to the flow regulating valve.

5. A road asphalt paving device according to claim 1, characterized in that, The intelligent controller includes a material distributing control module, a heating control module, a stirring control module, a discharge control module, and a compaction control module. The material distributing control module is electrically connected to the material distributing and crushing jaw crusher; the heating control module is electrically connected to the heating plate; the stirring control module is electrically connected to the mixing agitator; the discharge control module is electrically connected to the discharge pipe; the compaction control module is electrically connected to the vibrator.

6. A method for laying road asphalt, applicable to a road asphalt laying device according to any one of claims 1-5, characterized in that, Comprising: S1: Add stones to the loading box, and control the material distributing and crushing jaw crusher through the material distributing control module to break the stones to obtain mixed crushed stones; S2: Add asphalt to the mixed material storage tank, and turn on the heating plate to heat and keep the asphalt warm; S3: Distribute the mixed crushed stones into the mixed material storage tank, and perform a stirring process on the mixed crushed stones and asphalt to obtain asphalt mixture; S4: According to the road slope value, control the road paving device to change the discharge speed of the discharge port, and move forward for paving and primary compaction; S5: Close the discharge port, and control the vibrator of the compaction mechanism to change the vibration frequency to perform secondary compaction and final compaction on the road.

7. A method for laying road asphalt according to claim 6, characterized in that, The S4 is provided with: , where v2 is the discharging speed, m is the mass of asphalt mixture required per square centimeter of the road cross-section, k is the viscosity of the asphalt mixture, and θ is the road slope angle value.

8. A method for paving road asphalt according to claim 6, characterized in that In S5, corresponding vibration frequencies are set according to the number of times of compacting the road surface to compact the asphalt mixture.

9. A method for paving road asphalt according to claim 6, characterized in that, The road asphalt paving method performs three-layer road paving, and the paving layers are respectively a cushion layer, a base layer, and a surface layer. When paving each layer, S1 obtains mixed crushed stones with corresponding particle sizes.

10. A method for paving road asphalt according to claim 9, characterized in that, In the above S1, according to whether the laying layer is the cushion layer, the base layer or the surface layer, the material distribution control module respectively selects and controls the jaw plate spacing adjustment component of the material distribution crusher to adjust the spacing between the adjustable jaw plate and the fixed jaw plate to the first-stage jaw spacing, the second-stage jaw spacing and the third-stage jaw spacing, so as to adjust the particle fineness of the mixed gravel in different laying layers.

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