Multi-stage vibration paving and compacting integrated equipment for pavement hardening engineering

Abstract

The invention relates to the technical field of smoke removal devices for pavement paving, in particular to multistage vibration paving and compacting integrated equipment for pavement hardening engineering, which comprises a rack, a shell, a support frame, a primary pressing wheel, a secondary pressing wheel, a support wheel, a conveyor belt and a hopper, and further comprises a paving assembly, a support assembly and a purification assembly, the primary pressing wheel is rotationally connected to the left end of the rack, the secondary pressing wheel is rotationally connected to the right end of the rack, the supporting wheels are rotationally connected to the two ends of the supporting frame, the paving assembly is installed at the left end of the primary pressing wheel, the conveying belt is installed in the rack and extends to the upper end of the paving assembly, and the adsorption assembly is installed at the lower end of the conveying belt. The supporting assembly is installed at the upper end of the rack, the hopper is installed at the upper end of the supporting assembly, the supporting angle of the supporting assembly is changed along with movement of the paver, meanwhile, the purifying assembly is driven to adsorb asphalt smoke, and the asphalt smoke is discharged to the front end of the re-pressing wheel after passing through the purifying assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke removal devices for road paving, and in particular to a multi-stage vibration paving and compaction integrated equipment for road hardening engineering. Background Art

[0002] Asphalt paving is the core link in road construction that determines the smoothness, density and service life of the road surface. Before asphalt paving, the temperature of ordinary asphalt shall not be lower than 130~150℃, and the temperature of modified asphalt shall not be lower than 150℃. It shall be transported to the paver hopper by a transport vehicle covered with an insulating tarpaulin. The temperature of the asphalt when it reaches the paver hopper shall not be lower than 130℃, and the paver screed shall be preheated to above 100℃. After the high-temperature asphalt is paved by the paver, it shall be compacted multiple times by a roller before the temperature drops to complete the entire process.

[0003] However, during the entire asphalt paving process, the asphalt needs to maintain its fluidity, so the asphalt will be in a high-temperature state during the entire process. When the asphalt is in a high-temperature state, asphalt smoke will be produced. Asphalt smoke contains toxic and harmful substances such as THC and benzo[a]pyrene. Short-term exposure to asphalt smoke may cause respiratory irritation and dizziness, while long-term exposure increases the risk of cancer.

[0004] The existing solution is to collect the exhaust gas around the asphalt paver by setting up movable gas collection devices on both sides of the asphalt paver, and reduce the emission of asphalt smoke by adsorbing organic matter in the exhaust gas through activated carbon adsorption beds to meet the national emission standards.

[0005] However, in hot weather, when road hardening projects need to be carried out in residential areas, the asphalt pavement cools down slowly due to the high temperature, and the paver will still produce asphalt smoke for a period of time after paving. In addition, in residential areas, due to the dense buildings and poor ventilation environment, the asphalt smoke cannot be dispersed in time. In addition, the residential areas are densely populated, and the asphalt smoke that fails to disperse in time will have an impact on the health of surrounding residents.

[0006] In view of the above situation, the present invention designs a multi-stage vibration paving and compaction integrated equipment for road hardening engineering, which solves the above technical problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a multi-stage vibration paving and compaction integrated device for road surface hardening projects. In order to solve the problem that during road surface hardening projects in residential areas under high-temperature and hot weather, asphalt fumes are generated because the asphalt road surface cannot cool quickly, and due to the poor ventilation environment, the asphalt fumes cannot disperse in time, which will affect the health of surrounding residents. The present invention solves this problem by setting a support component and a purification component. During the paving process, while ensuring that the pressure on the asphalt road surface remains unchanged by changing the support angle of the material, the support component presses down to drive the purification component to adsorb asphalt fumes and cool the road surface after double compaction in a timely manner.

[0008] In order to achieve the above technical purpose, the present invention provides the following technical solution: A multi-stage vibration paving and compaction integrated device for road surface hardening projects, including a frame, a housing, a support frame, a primary compaction wheel, a double compaction wheel, a support wheel, a conveyor belt, and a hopper. It also includes a paving component, a support component, and a purification component. The support frame is movably connected to the center position of the frame. The primary compaction wheel is rotatably connected to the left end of the frame. The double compaction wheel is rotatably connected to the right end of the frame. The support wheel is rotatably connected to both ends of the support frame. The paving component is installed at the left end of the primary compaction wheel. The conveyor belt is installed inside the frame and extends to the upper end of the paving component. The adsorption component is installed at the lower end of the conveyor belt. The support component is installed at the upper end of the frame. The hopper is installed at the upper end of the support component. The support component changes the support angle as the paver moves, and at the same time drives the purification component to adsorb asphalt fumes. The asphalt fumes are discharged to the front end of the double compaction wheel after passing through the purification component.

[0009] Preferably, the paving component includes a screed, a distributor, and a gas collection hood. The gas collection hood is fixedly installed on the left side of the frame and is connected to the housing. The distributor is rotatably installed inside the gas collection hood. The screed is fixedly installed at the bottom end of the gas collection hood.

[0010] In the above solution, by setting a gas collection hood on the outside of the distributor and the screed and connecting it to the housing, the entire paving component becomes a relatively enclosed environment. Compared with the prior art, the situation of asphalt fume escape is greatly reduced.

[0011] Preferably, the support component includes a moving plate, a first support rod, a second support rod, a hydraulic cylinder, a control box, a steering gear, and a telescopic rod. Two sliding grooves are opened on the frame. The two moving plates are slidably connected in the sliding grooves. One end of each of the two first support rods is movably connected to the left end of the hopper. The upper ends of the two second support rods are movably connected to the right end of the hopper. The control box is fixedly connected to the upper side of the support frame. The fixed ends of the two telescopic rods are respectively fixedly installed on both sides of the control box. One side of the hydraulic cylinder is fixedly connected to the extended end of the telescopic rod, and the bottom end is fixedly installed on the moving plate. One end of the steering gear is movably connected to the hydraulic cylinder, and the other end is fixedly installed at the lower ends of the first support rod and the second support rod.

[0012] In the above solution, as the paver continuously paves and the material decreases, the gravity of the material continuously decreases. At this time, the telescopic rod continuously extends, driving the first support rod, and the lower ends of the second support rod move towards the left and right ends. At this time, the angle between the supporting forces of the first support rod and the second support rod on the hopper and the reaction force of the gravity of the material continuously increases. Let the included angle between the supporting force and the reaction force of the gravity be a, the gravity of the material be F1, and the magnitude of the supporting forces of the first support rod and the second support rod on the hopper be F2. At this time, F1 = F2cosα. When F1 decreases, the lower ends of the first support rod and the second support rod move towards the left and right ends, increasing α and decreasing cosα, so that F2 remains unchanged. At this time, the forces on the first support rod and the second support rod remain unchanged. Since the first support rod and the second support rod are fixedly connected to the steering gear, the force on the steering gear is the same as that on the first support rod and the second support rod. Since the inside of the steering gear is connected to the inside of the hydraulic cylinder, the forces on the first support rod and the second support rod along the directions of the first support rod and the second support rod are converted into vertically downward forces through the steering gear and the hydraulic cylinder. At this time, although the material decreases, the pressure of the hopper and the support assembly on the primary compaction wheel and the secondary compaction wheel remains unchanged. Through this solution, it can be ensured that the pressure of the primary compaction wheel and the secondary compaction wheel on the road surface always remains unchanged, ensuring uniform compression of the asphalt road surface.

[0013] Preferably, a transmission assembly is connected between the primary compaction wheel, the secondary compaction wheel and the moving plate. The transmission assembly includes a rotating shaft, a connecting rod, a belt, a gear and a rack. The rotating shaft is fixedly connected to both sides of the primary compaction wheel and the secondary compaction wheel. Fixed plates are installed on both sides of the frame. The connecting rod is rotatably installed on the fixed plate and penetrates through the fixed plate. The belt is respectively matched with the rotating shaft and the connecting rod. A gear is fixedly installed at one end of the connecting rod. Racks are installed on both sides of the moving plate. The gear and the rack are matched with each other.

[0014] In the above solution, when the primary compaction wheel and the secondary compaction wheel rotate, the connecting rod is driven to rotate through the belt. Since a gear is fixedly installed at one end of the connecting rod, racks are installed on both sides of the moving plate, and the gear and the rack are matched with each other. At this time, the rotation of the primary compaction wheel and the secondary compaction wheel will drive the movement of the moving plate. In this way, the rotation speed of the primary compaction wheel and the secondary compaction wheel is used to control the telescopic speed of the telescopic rod to ensure the speed of the support assembly driving the hopper to descend, and further ensure the stability of the pressure on the asphalt road surface.

[0015] Preferably, the purification device includes a driving rod, a gas collecting chamber, a purification chamber and a fan blade. The two ends of the driving rod are respectively rotatably installed in the control box. The gas collecting chamber is fixedly installed between the outer circumferences of the driving rod. The fan blade is fixedly installed on the outside of the driving rod. A gas collecting pipe is installed on one side of the gas collecting hood. The gas collecting pipe is communicated with the gas collecting chamber and the gas collecting hood. An exhaust pipe is fixedly installed at the right end of the gas collecting chamber. The end of the exhaust pipe is fixedly connected to the purification chamber. A transmission rod is connected inside the telescopic rod. The end of the transmission rod is meshed with the driving rod.

[0016] In the above solution, when the telescopic rod expands and contracts to drive the support assembly to move downward, the movement of the telescopic rod drives the internal transmission rod to move. Since the end of the transmission rod meshes with the drive rod, at this time, the movement of the transmission rod drives the drive rod to rotate. Since a fan blade is installed on the outer side of the drive rod, when the drive rod rotates, a negative pressure will be formed in the air collection chamber, absorbing the asphalt fumes in the air collection hood through the air collection pipe and discharging them to the purification chamber through the exhaust pipe. Activated carbon is placed in the purification chamber, and the harmful gases in the asphalt fumes are adsorbed by the activated carbon. Since a sealed environment is formed between the air collection hood and the outer shell, most of the asphalt fumes can be adsorbed in this way, preventing the concentration of asphalt fumes from being too high.

[0017] Preferably, a control rod is fixedly installed at the upper end of the control box. The control rod penetrates through the bottom of the hopper. The upper end of the control rod is movably connected to a pushing plate, and the bottom end of the pushing plate is connected to the hopper.

[0018] In the above solution, the pushing plate is movably connected to the control rod and the lower end is connected to the bottom end of the hopper. When the hopper descends with the support assembly, the angle of the pushing plate gradually inclines, pushing the material onto the conveyor belt. Since the movement of the support assembly is driven by the primary pressing wheel and the secondary pressing wheel, the speed at which the pushing plate pushes the material is determined by the movement speeds of the primary pressing wheel and the secondary pressing wheel. In this way, the discharging speed can be ensured to be uniform, avoiding excessive discharging and causing the screed to tilt, and further causing the paved road surface to be uneven.

[0019] Preferably, the upper end of the hopper is sealed after being closed, and a trapezoidal telescopic pipe is connected between the hopper and the outer shell.

[0020] In the above solution, the upper end of the hopper is sealed after being closed, and at the same time, a trapezoidal telescopic pipe is connected between the hopper and the outer shell to ensure that the material will not release asphalt fumes to the outside when it is in the hopper and during the falling process, making the whole machine form an almost airtight environment.

[0021] Preferably, a cooling box is fixedly connected to the right side of the purification chamber. The purification chamber semi-surrounds the outside of the cooling box and is provided with an exhaust hole on the side close to the secondary pressing wheel.

[0022] In the above solution, a cooling box is fixedly connected to the right side of the purification chamber, and the purification chamber semi-surrounds the outside of the cooling box, so that the purified asphalt fumes are cooled to a certain extent through the cooling box. At the same time, the cooling box sprays water to cool the secondary pressing wheel, using the secondary pressing wheel to reduce the temperature of the asphalt road surface, so that the temperature of the asphalt road surface after secondary pressing is lower than the temperature at which asphalt fumes are released. At the same time, the purification chamber is provided with an exhaust hole on the side close to the secondary pressing wheel, and the cooling of the secondary pressing wheel is accelerated by the discharged asphalt fumes.

[0023] The beneficial effects of the present invention are as follows: 1. A multi-stage vibration paving and compaction integrated equipment for road surface hardening projects. The existing method for treating asphalt fumes is to set up movable gas collection devices on both sides of the asphalt paver to collect the waste gas around the asphalt paver. However, since the asphalt road surface still needs to be kept at a high temperature during the compaction stage, there will still be asphalt fumes generated. In the present invention, the paver and the compactor are combined, and by setting up a support component and a purification component, while ensuring that the pressure on the road surface remains unchanged during the paving process, the purification component is driven to adsorb the harmful components in the asphalt fumes, and finally, the asphalt road surface is cooled after the compaction process to prevent asphalt fumes from being generated after compaction.

[0024] 2. A multi-stage vibration paving and compaction integrated equipment for road surface hardening projects. In the present invention, a transmission component is set between the primary compaction wheel, the secondary compaction wheel and the support component. The rotation of the primary compaction wheel and the secondary compaction wheel drives the telescopic rod in the support component to extend and contract. In this way, it can be ensured that the change in the angles of the first support rod and the second support rod in the support component is positively correlated with the running distance of the paver. At the same time, a control rod and a pushing plate are also provided, and the degree of the pushing plate pushing the material is controlled by the degree of the support component descending, so that the pressure received by the primary compaction wheel and the secondary compaction wheel is kept constant within a certain range, thereby ensuring the stability of the pressure on the asphalt road surface.

[0025] 3. A multi-stage vibration paving and compaction integrated equipment for road surface hardening projects. In the present invention, a purification component and a cooling box are set. The support component descending drives the purification component to absorb the asphalt fumes generated during the paving process. After the harmful components are absorbed by the purification bin in the purification component, the discharged gas and the cooling box cooperate to cool the secondary compaction wheel. While preventing asphalt adhesion, the temperature of the asphalt road surface is reduced to below the temperature at which asphalt fumes are generated, preventing asphalt fumes from continuing to be generated after the construction is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Now, the above and other aspects of the present invention will be described by way of example only with reference to the drawings, where: Figure 1 is the axonometric schematic diagram of the present invention; Figure 2 is the front view of the present invention; Figure 3 is the vertical sectional view of the present invention; Figure 4 is the top view of the present invention; Figure 5 is Figure 4 The enlarged view of part A in Figure 6 is the horizontal sectional view of the present invention; Figure 7 is Figure 6 the enlarged view of part B in Figure 8 is the rear view of the present invention after removing the double pressing wheel.

[0028] In the figure: 1, frame; 2, outer shell; 3, support frame; 4, primary pressing wheel; 5, double pressing wheel; 6, support wheel; 7, conveyor belt; 8, hopper; 81, telescopic pipe; 9, paving assembly; 91, screed; 92, distributor; 93, air collecting hood; 931, air collecting pipe; 932, exhaust pipe; 10, support assembly; 101, moving plate; 102, first support rod; 103, second support rod; 104, hydraulic cylinder; 105, control box; 1051, control rod; 1052, pushing plate; 106, steering gear; 107, telescopic rod; 108, chute; 109, fixing plate; 110, transmission rod; 11, purification assembly; 111, driving rod; 112, air collecting chamber; 113, purification chamber; 1131, exhaust hole; 114, fan blade; 12, transmission assembly; 121, rotating shaft; 122, connecting rod; 123, belt; 124, gear; 125, rack; 13, cooling box. Specific embodiments

[0029] In order to better understand the above technical solutions, the following will describe the above technical solutions in detail in conjunction with the accompanying drawings of the specification and specific embodiments.

[0030] As an embodiment of the present invention, referring to Figures 1 to 8 , in order to achieve the above technical objectives, the present invention provides the following technical solutions: A multi-stage vibration paving and compaction integrated device for road hardening projects, including a frame 1, an outer shell 2, a support frame 3, a primary pressing wheel 4, a double pressing wheel 5, a support wheel 6, a conveyor belt 7, a hopper 8, and further including a paving assembly 9, a support assembly 10, and a purification assembly 11. The support frame 3 is movably connected to the center position of the frame 1. The primary pressing wheel 4 is rotatably connected to the left end of the frame 1. The double pressing wheel 5 is rotatably connected to the right end of the frame 1. The support wheel 6 is rotatably connected to both sides of the support frame 3. The paving assembly 9 is installed at the left end of the primary pressing wheel 4. The conveyor belt 7 is installed inside the frame 1 and extends to the upper end of the paving assembly 9. The adsorption assembly is installed at the lower end of the conveyor belt 7. The support assembly 10 is installed at the upper end of the frame 1. The hopper 8 is installed at the upper end of the support assembly 10. The support assembly 10 reduces the support angle as the primary pressing wheel 4 and the double pressing wheel 5 move forward, and at the same time drives the purification assembly 11 to adsorb asphalt fumes. The asphalt fumes are discharged to the front end of the double pressing wheel 5 after passing through the purification assembly 11.

[0031] As an implementation manner of the present invention, refer to Figures 1 to 3 , the paving assembly 9 includes a screed 91, a distributor 92 and an air collecting hood 93. The air collecting hood 93 is fixedly installed on the left side of the frame 1 and is communicated with the outer shell 2. The distributor 92 is rotatably installed inside the air collecting hood 93. The screed 91 is fixedly installed at the bottom end of the air collecting hood 93. By arranging the air collecting hood 93 outside the distributor 92 and the screed 91 and communicating it with the outer shell 2, the whole paving assembly 9 is made into a relatively closed environment. Compared with the prior art, the escape of asphalt fumes is greatly reduced.

[0032] As an implementation manner of the present invention, refer to Figures 1 to 3, the support assembly 10 includes a moving plate 101, a first support rod 102, a second support rod 103, a hydraulic cylinder 104, a control box 105, a steering gear 106, and a telescopic rod 107. Two sliding grooves 108 are formed in the frame 1, and the two moving plates 101 are slidably connected in the sliding grooves 108. One ends of the two first support rods 102 are movably connected to the left end of the hopper 8, and the upper ends of the two second support rods 103 are movably connected to the right end of the hopper 8. The control box 105 is fixedly connected to the upper side of the support frame 3. The fixed ends of the two telescopic rods 107 are fixedly installed on both sides of the control box 105. One side of the hydraulic cylinder 104 is fixedly connected to the extending end of the telescopic rod 107, and the bottom end is fixedly installed on the moving plate 101. One end of the steering gear 106 is movably connected to the hydraulic cylinder 104, and the other end is fixedly installed at the lower ends of the first support rod 102 and the second support rod 103. As the paver continuously paves, the material decreases, and the gravity of the material continuously decreases. At this time, the telescopic rod 107 continuously extends, driving the lower ends of the first support rod 102 and the second support rod 103 to move towards the left and right ends. At this time, the angle between the supporting force of the first support rod 102 and the second support rod 103 on the hopper 8 and the reaction force of the gravity of the material continuously increases. Let the included angle between the supporting force and the reaction force of the gravity be a, the gravity of the material be F1, and the magnitude of the supporting force of the first support rod 102 and the second support rod 103 on the hopper 8 be F2. At this time, F1 = F2 COSa. When F1 decreases, the lower ends of the first support rod 102 and the second support rod 103 move towards the left and right ends to increase a, and COSa decreases, so that F2 remains unchanged. At this time, the forces on the first support rod 102 and the second support rod 103 remain unchanged. Since the first support rod 102 and the second support rod 103 are fixedly connected to the steering gear 106, the force on the steering gear 106 is the same as that on the first support rod 102 and the second support rod 103. Since the inside of the steering gear 106 is communicated with the inside of the hydraulic cylinder 104, the force along the directions of the first support rod 102 and the second support rod 103 on the first support rod 102 and the second support rod 103 is converted into a vertically downward force through the steering gear 106 and the hydraulic cylinder 104. At this time, although the material decreases, the pressure of the hopper 8 and the support assembly 10 on the primary compaction wheel 4 and the secondary compaction wheel 5 remains unchanged. Through this solution, it can be ensured that the pressure of the primary compaction wheel 4 and the secondary compaction wheel 5 on the road surface always remains unchanged, ensuring uniform compaction of the asphalt road surface.

[0033] As an implementation manner of the present invention, refer to Figure 2 , Figure 4 and Figure 5, a transmission component 12 is connected between the primary pressing wheel 4, the secondary pressing wheel 5 and the moving plate 101. The transmission component 12 includes a rotating shaft 121, a connecting rod 122, a belt 123, a gear 124 and a rack 125. The rotating shaft 121 is fixedly connected to both sides of the primary pressing wheel 4 and the secondary pressing wheel 5. Fixed plates 109 are installed on both sides of the frame 1. The connecting rod 122 is rotatably installed on the fixed plate 109 and penetrates through the fixed plate 109. The belt 123 is respectively matched with the rotating shaft 121 and the connecting rod 122. A gear 124 is fixedly installed at one end of the connecting rod 122. Racks 125 are installed on both sides of the moving plate 101. The gear 124 and the rack 125 are matched. When the primary pressing wheel 4 and the secondary pressing wheel 5 rotate, the connecting rod 122 is driven to rotate through the belt 123. Since a gear 124 is fixedly installed at one end of the connecting rod 122, racks 125 are installed on both sides of the moving plate 101, and the gear 124 and the rack 125 are matched, the rotation of the primary pressing wheel 4 and the secondary pressing wheel 5 will drive the movement of the moving plate 101 at this time. In this way, the rotation speed of the primary pressing wheel 4 and the secondary pressing wheel 5 is used to control the telescopic speed of the telescopic rod 107 to ensure the speed of the support assembly 10 driving the hopper 8 to descend, and further ensure the stability of the pressure on the asphalt pavement.

[0034] As an implementation manner of the present invention, referring to Figure 2 , Figure 6 and Figure 7 , the purification device includes a driving rod 111, a gas collection chamber 112, a purification chamber 113 and a fan blade 114. Both ends of the driving rod 111 are respectively rotatably installed in the control box 105. The gas collection chamber 112 is fixedly installed between the outer peripheries of the driving rod 111. The fan blade 114 is fixedly installed on the outside of the driving rod 111. A gas collection pipe 931 is installed on one side of the gas collection hood 93. The gas collection pipe 931 is communicated with the gas collection chamber 112 and the gas collection hood 93. An exhaust pipe 932 is fixedly installed at the right end of the gas collection chamber 112. The right end of the exhaust pipe 932 is fixedly connected to the purification chamber 113. A transmission rod 110 is connected inside the telescopic rod 107. The end of the transmission rod 110 is meshed with the driving rod 111. When the telescopic rod 107 expands and contracts to drive the support assembly 10 to move downward, the movement of the telescopic rod 107 drives the internal transmission rod 110 to move. Since the end of the transmission rod 110 is meshed with the driving rod 111, the movement of the transmission rod 110 drives the driving rod 111 to rotate at this time. Since a fan blade 114 is installed on the outside of the driving rod 111, when the driving rod 111 rotates, a negative pressure will be formed in the gas collection chamber 112, and the asphalt fume in the gas collection hood 93 will be absorbed through the gas collection pipe 931 and discharged to the purification chamber 113 through the exhaust pipe 932. Activated carbon is placed in the purification chamber 113, and the harmful gases in the asphalt fume are adsorbed by the activated carbon. Since the gas collection hood 93 and the housing 2 form a sealed environment, most of the asphalt fume can be adsorbed in this way to prevent the concentration of the asphalt fume from being too high.

[0035] As an embodiment of the present invention, referring to Figure 1 and Figure 3 , a control rod 1051 is fixedly installed at the upper end of the control box 105. The control rod 1051 penetrates through the bottom of the hopper 8. The upper end of the control rod 1051 is movably connected to a pushing plate 1052, and the bottom end of the pushing plate 1052 is connected to the hopper 8. The pushing plate 1052 is movably connected to the control rod 1051 and the lower end is connected to the bottom end of the hopper 8. When the hopper 8 descends with the support assembly 10, the angle of the pushing plate 1052 gradually inclines, pushing the material to fall onto the conveyor belt 7. Since the movement of the support assembly 10 is driven by the primary pressing wheel 4 and the secondary pressing wheel 5, the speed at which the pushing plate 1052 pushes the material is determined by the movement speeds of the primary pressing wheel 4 and the secondary pressing wheel 5. In this way, the discharging speed can be ensured to be uniform, avoiding excessive discharging resulting in the tilting of the screed 91 and further causing the unevenness of the paved road surface.

[0036] As an embodiment of the present invention, referring to Figure 8 , preferably, the upper end of the hopper 8 is sealed after being closed, and a trapezoidal telescopic pipe 81 is connected between the hopper 8 and the housing 2. The upper end of the hopper 8 is sealed after being closed, and at the same time, the connection of the trapezoidal telescopic pipe 81 between the hopper 8 and the housing 2 ensures that the asphalt fume will not be released externally when the material is in the hopper 8 and during its falling, making the whole machine form an almost airtight environment.

[0037] As an embodiment of the present invention, referring to Figure 1 and Figure 8 , a cooling box 13 is fixedly connected to the right side of the purification bin 113. The purification bin 113 semi - surrounds the cooling box 13 on the outside and has an exhaust hole 1131 on the side close to the secondary pressing wheel 5. A cooling box 13 is fixedly connected to the right side of the purification bin 113, and the purification bin 113 semi - surrounds the cooling box 13 on the outside, enabling the purified asphalt fume to be cooled to a certain extent by the cooling box 13. At the same time, the cooling box 13 sprays water to cool the secondary pressing wheel 5, using the secondary pressing wheel 5 to reduce the temperature of the asphalt road surface so that the temperature of the asphalt road surface after secondary pressing is lower than the temperature at which the asphalt fume is released. At the same time, the purification bin 113 has an exhaust hole 1131 on the side close to the secondary pressing wheel 5, and the discharged asphalt fume accelerates the cooling of the secondary pressing wheel 5.

[0038] Working principle: As the paver continuously paves, the material decreases and the gravity of the material continuously decreases. At this time, the telescopic rod 107 continuously extends, pushing the moving plate 101 to move along the chute 108 to the left and right sides, driving the first support rod 102 and the lower ends of the second support rods 103 to move to the left and right ends, so that the pressures on the primary pressing wheel 4 and the secondary pressing wheel 5 remain unchanged. At the same time, the movement of the telescopic rod 107 drives the driving rod 111 to rotate, forming a negative pressure in the air collecting bin 112, absorbing the asphalt fume in the air collecting hood 93 through the air collecting pipe 931, and purifying the asphalt fume and cooling the secondary pressing wheel 5 together with the cooling box 13.

[0039] The specific working process is as follows: Support process: When the primary pressing wheel 4 and the secondary pressing wheel 5 rotate, the connecting rod 122 is driven to rotate through the belt 123. Since a gear 124 is fixedly installed at one end of the connecting rod 122, racks 125 are installed on both sides of the moving plate 101, and the gear 124 and the racks 125 cooperate with each other. At this time, the rotation of the primary pressing wheel 4 and the secondary pressing wheel 5 will drive the movement of the moving plate 101. The movement of the moving plate 101 drives the telescopic rod 107 to continuously extend, driving the first support rod 102 and the lower ends of the second support rods 103 to move towards the left and right ends. At this time, the material is continuously decreasing, but the forces on the first support rod 102 and the second support rods 103 remain unchanged.

[0040] Purification process: When the telescopic rod 107 drives the support assembly 10 to move downward, the telescopic rod 107 drives the internal transmission rod 110 to move. Since the end of the transmission rod 110 meshes with the driving rod 111, the movement of the transmission rod 110 drives the driving rod 111 to rotate at this time. Since a fan blade 114 is installed on the outer side of the driving rod 111, when the driving rod 111 rotates, a negative pressure will be formed in the air collection chamber 112, absorbing the asphalt fume in the air collection hood 93 through the air collection pipe 931 and discharging it to the purification chamber 113 through the exhaust pipe 932. Activated carbon is placed in the purification chamber 113 to adsorb harmful gases in the asphalt fume.

[0041] Cooling process: A cooling box 13 is fixedly connected to the right side of the purification chamber 113, and the purification chamber 113 semi - surrounds the cooling box 13, so that the purified asphalt fume is cooled to a certain extent through the cooling box 13. At the same time, the cooling box 13 sprays water to cool the secondary pressing wheel 5, using the secondary pressing wheel 5 to reduce the temperature of the asphalt pavement, so that the temperature of the asphalt pavement after secondary pressing is lower than the temperature at which the asphalt fume is released. At the same time, the purification chamber 113 is provided with exhaust holes 1131 on the side close to the secondary pressing wheel 5, and the discharged asphalt fume accelerates the cooling of the secondary pressing wheel 5.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage vibration paving and compaction integrated device for pavement hardening projects, comprising a frame (1), a housing (2), a support frame (3), a primary compaction wheel (4), a secondary compaction wheel (5), a support wheel (6), a conveyor belt (7), and a hopper (8), characterized in that It further includes a paving assembly (9), a support assembly (10), and a purification assembly (11). The support frame (3) is movably connected to the central position of the frame (1). The primary compaction wheel (4) is rotatably connected to the left end of the frame (1). The secondary compaction wheel (5) is rotatably connected to the right end of the frame (1). The support wheels (6) are rotatably connected to both sides of the support frame (3). The paving assembly (9) is installed at the left end of the primary compaction wheel (4). The conveyor belt (7) is installed inside the frame (1) and extends to the upper end of the paving assembly (9). The purification assembly (11) is installed at the lower end of the conveyor belt (7). The support assembly (10) is installed at the upper end of the frame (1). The hopper (8) is installed at the upper end of the support assembly (10). The support assembly (10) moves forward with the primary compaction wheel (4) and the secondary compaction wheel (5) to reduce the support angle, and at the same time drives the purification assembly (11) to adsorb asphalt fumes. After passing through the purification assembly (11), the asphalt fumes are blown to the front end of the secondary compaction wheel (5).

2. The multi-stage vibration paving and compaction integrated equipment for road hardening engineering according to claim 1, characterized in that: The paving assembly (9) includes a screed (91), a distributor (92), and a gas collection hood (93). The gas collection hood (93) is fixedly installed on the left side of the frame (1) and is connected to the housing (2). The distributor (92) is rotatably installed inside the gas collection hood (93). The screed (91) is fixedly installed at the bottom end of the gas collection hood (93).

3. The multi-stage vibration paving and compaction integrated equipment for pavement hardening project according to claim 2, wherein: The support assembly (10) includes a moving plate (101), a first support rod (102), a second support rod (103), a hydraulic cylinder (104), a control box (105), a steering gear (106), and a telescopic rod (107). Two sliding grooves (108) are formed on the frame (1). The two moving plates (101) are slidably connected in the sliding grooves (108). The upper ends of the two first support rods (102) are movably connected to the left end of the hopper (8). The upper ends of the two second support rods (103) are movably connected to the right end of the hopper (8). The control box (105) is fixedly connected to the upper side of the support frame (3). The fixed ends of the two telescopic rods (107) are respectively fixedly installed on both sides of the control box (105). The hydraulic cylinder (104) is fixedly connected to the extended end of the telescopic rod (107), and the bottom end is fixedly installed on the moving plate (101). One end of the steering gear (106) is movably connected to the hydraulic cylinder (104), and the other end is fixedly installed at the lower ends of the first support rod (102) and the second support rod (103).

4. A multi - stage vibration paving and compaction integrated device for pavement hardening projects according to claim 3, characterized in that: A transmission assembly (12) is connected between the primary pressure wheel (4), the secondary pressure wheel (5) and the movable plate (101), and the transmission assembly (12) includes a rotating shaft (121), a connecting rod (122), a belt (123), a gear (124) and a rack (125). The rotating shaft (121) is fixedly connected to both sides of the primary pressure wheel (4) and the secondary pressure wheel (5). Fixed plates (109) are installed on both sides of the frame (1). The connecting rod (122) is rotatably installed on the fixed plate (109) and passes through the fixed plate (109). The belt (123) is respectively matched with the rotating shaft (121) and the connecting rod (122). A gear (124) is fixedly installed on one end of the connecting rod (122). Racks (125) are installed on both sides of the movable plate (101), and the gear (124) and the rack (125) are matched with each other.

5. The multi-stage vibration paving and compaction integrated equipment for road hardening engineering according to claim 3, characterized in that: The purification device comprises a driving rod (111), an air collecting bin (112), a purification bin (113) and a fan blade (114), wherein both ends of the driving rod (111) are rotatably mounted in a control box (105), the air collecting bin (112) is fixedly mounted between two control boxes (105), the fan blade (114) is fixedly mounted on the outside of the driving rod (111), a collecting pipe (931) is mounted on one side of the air collecting hood (93), the collecting pipe (931) is connected to the air collecting bin (112) and the air collecting hood (93), an exhaust pipe (932) is fixedly mounted on the right end of the air collecting bin (112), and the right end of the exhaust pipe (932) is fixedly connected to the purification bin (113), a transmission rod (110) is connected to the inside of the telescopic rod (107), and the end of the transmission rod (110) is engaged with the driving rod (111).

6. The multi-stage vibration paving and compaction integrated equipment for pavement hardening project according to claim 3, wherein: A control rod (1051) is fixedly mounted on the upper end of the control box (105), and the control rod (1051) passes through the bottom of the hopper (8). The upper end of the control rod (1051) is movably connected to a push plate (1052), and the bottom end of the push plate (1052) is connected to the bottom end of the hopper (8).

7. A multi-stage vibration paving and compaction integrated device for pavement hardening projects according to claim 1, characterized in that: The upper end of the hopper (8) is sealed after closing, and a trapezoidal telescopic tube (81) is connected between the hopper (8) and the housing (2).

8. An integrated multi-stage vibration paving and compaction equipment for pavement hardening projects according to claim 5, characterized in that: The cooling box (13) is fixedly connected to the right side of the purification chamber (113). The purification chamber (113) is semi-enclosed outside the cooling box (13) and is provided with an exhaust hole (1131) on a side close to the re-pressing wheel (5).

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