A device for detecting the paving thickness of asphalt mixture in asphalt pavement construction

Abstract

This invention discloses an asphalt mixture paving thickness detection device for asphalt pavement construction, belonging to the field of pavement construction testing technology. It includes a mobile trolley, a mobile base slidably mounted on the trolley, a displacement drive assembly for driving the mobile base, a motor support mounted above the mobile base, a first motor mounted on the motor support, a telescopic device connected to the output end of the first motor, and a detection assembly connected to the output end of the telescopic device. The asphalt mixture on the paving layer surface acts on a limiting pressure plate, causing a spring to deform. After the probe reaches the bottom of the paving layer, a pressure sensor sends a signal, which drives the telescopic device to stop via a controller. The displacement value of the displacement sensor at this time is recorded. This invention can be used to detect the paving thickness of each layer of asphalt mixture before curing, ensuring that the detection benchmark and thickness detection position correspond, thereby improving the accuracy of asphalt mixture paving thickness detection.

Description

Technical Field

[0001] This invention belongs to the field of road construction testing technology, and specifically relates to a device for detecting the paving thickness of asphalt mixtures for asphalt pavement construction. Background Technology

[0002] In my country's existing road system, asphalt pavement accounts for a high proportion of the total road mileage due to its driving comfort and economy. During its construction, the asphalt mixture paving thickness is a crucial indicator, essential for ensuring pavement quality, durability, and service performance. Uneven or insufficient paving thickness leads to variations in the asphalt surface layer thickness. Under heavy vehicle loads and environmental loads, stress concentration can easily occur at weak points in the asphalt surface layer, resulting in rutting, cracks, and other damage, thus shortening the road's service life.

[0003] Currently, during the construction of asphalt pavements, the asphalt mixture in the surface layer is laid in layers by a paver. During this process, engineers typically use a ruler or other tools to measure the loose thickness of the paved layer and adjust the paver parameters accordingly. However, the adhesive properties of asphalt hinder the insertion of the ruler, causing a mismatch between the roadbed reference point and the real-time location of the asphalt mixture paving thickness measurement. Therefore, this method cannot accurately represent the asphalt mixture paving thickness measurement results. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an asphalt mixture paving thickness detection device for asphalt pavement construction, which can be used to detect the paving thickness of each layer of asphalt mixture before curing, so that the detection benchmark and the thickness detection position correspond, thereby improving the accuracy of asphalt mixture paving thickness detection.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention discloses an asphalt mixture paving thickness detection device for asphalt pavement construction, comprising a mobile trolley, a mobile base slidably mounted on the mobile trolley, a displacement drive assembly for driving the mobile base to slide, a motor support mounted above the mobile base, a first motor mounted on the motor support, a telescopic device connected to the output end of the first motor, and a detection component connected to the output end of the telescopic device. The mobile trolley can move laterally along the road surface, and the mobile base can move longitudinally along the road surface under the drive of the displacement drive assembly. The first motor can drive the telescopic device to rotate. The detection component includes a bracket, a support ring fixed to the bracket, a plurality of connecting pieces evenly distributed in a ring on the inner side of the support ring, and a support ring connected to and coaxially fixed to the connecting pieces. A probe is located at the center of the support ring, extending vertically downwards. A pressure sensor is installed at the lower end of the probe. A sleeve is slidably mounted on the outer side of the probe, and a limit plate is fixed at the lower end of the sleeve. A displacement sensor is installed on the limit plate. A limit piece is fixed at the lower part of the probe, and a spring connects the limit piece and the limit plate. The outer side of the sleeve has grooves for the connecting piece and the limit piece to make way for each other. The telescopic device drives the detection component to move along the normal direction of the asphalt pavement. The asphalt mixture on the surface of the paved layer acts on the limit plate and causes the spring to deform. After the probe reaches the bottom of the paved layer, the pressure sensor sends a signal, which drives the telescopic device to stop through the controller. The displacement value of the displacement sensor at this time is recorded.

[0007] Furthermore, the lower end of the probe is provided with a mounting groove for mounting a pressure sensor, and the mounting groove is filled with an elastic support block, which is used to support the pressure sensor.

[0008] Furthermore, an arc-shaped plate is fixed to the outer end of the limiting piece. The arc-shaped plate extends in the vertical direction, and each arc-shaped plate is formed on the circumference of the same cylindrical tube. The lower end of the arc-shaped plate is flush with the lower end of the probe.

[0009] Furthermore, the limiting pressure plate is circular, and the outer side of the limiting pressure plate slides in conjunction with the inner side of the arc-shaped plate.

[0010] Furthermore, a vibrating plate is fixedly connected to the outer side of the arc-shaped plate, and the vibrating plate is connected to a power source.

[0011] Furthermore, a blower pipe is fixedly connected to the outer side of the sleeve by a support rod, the upper end of the blower pipe is connected to a blower through a pipe, and the middle part of the blower pipe is slidably disposed in a sliding sleeve fixed to the outer side of the arc plate.

[0012] Furthermore, a limiting plate is fixedly connected to the upper end of the probe, and the outer diameter of the limiting plate is larger than the inner diameter of the sleeve.

[0013] Furthermore, the movable base is fixed with rotating shafts on both sides, the rotating shafts are evenly spaced along the longitudinal direction, and the two ends of the rotating shafts are rotatably connected to rollers. The upper side of the movable trolley is provided with a limiting groove that cooperates with the rollers. The displacement driving assembly includes a rack fixed to the upper surface of the movable base, a gear meshing with the rack, and a second motor that drives the gear to rotate. The second motor is fixed on the movable trolley.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention discloses an asphalt mixture paving thickness detection device for asphalt pavement construction. The mobile trolley can move laterally along the road surface, and the mobile base drives the detection component to move longitudinally along the road surface under the drive of the displacement drive component. Thus, the thickness of the asphalt pavement within a certain range can be detected, and the detection range is wider.

[0016] In the device disclosed in this invention, the contact area between the probe and the asphalt mixture is small, which allows it to be accurately inserted into the bottom of the paving layer. The paving thickness can be detected without waiting for the asphalt mixture to cure, thus enabling simultaneous paving and detection and improving detection efficiency.

[0017] In the device disclosed in this invention, during specific testing, a probe is inserted into the asphalt mixture and the testing component moves downward continuously. When the probe is continuously inserted, the asphalt mixture on the surface of the paving layer can react upward on the limiting pressure plate, thereby driving the limiting pressure plate and the sleeve to move. When the probe reaches the bottom of the paving layer, the pressure sensor sends a signal and drives the telescopic device to stop through the controller. The displacement value of the displacement sensor at this time is recorded, which can realize the rapid detection of the asphalt mixture paving thickness.

[0018] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0019] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0020] Figure 1 This is a schematic diagram of the structure of the device of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of the device of the present invention. Figure 2 ;

[0022] Figure 3 This is a cross-sectional view of asphalt;

[0023] Figure 4 for Figure 3 Enlarged view at point A;

[0024] Figure 5 This is a schematic diagram of the detection component.

[0025] Figure 6 This is a schematic diagram of the movable base.

[0026] The following components are labeled in the attached diagram: 1. Moving trolley; 2. Moving base; 3. Displacement drive assembly; 4. Motor support; 5. First motor; 6. Telescopic device; 7. Detection assembly; 8. Bracket; 9. Support ring; 10. Connecting piece; 11. Probe; 12. Pressure sensor; 13. Sleeve; 14. Limiting plate; 15. Displacement sensor; 16. Limiting piece; 17. Spring; 18. Slide groove; 19. Mounting groove; 20. Elastic support block; 21. Arc plate; 22. Vibrating plate; 23. Support rod; 24. Air pipe; 25. Sliding sleeve; 26. Limiting plate; 27. Roller; 28. Limiting groove; 29. ​​Rack; 30. Gear; 31. Second motor. Detailed Implementation

[0027] like Figures 1-6 As shown, this invention discloses an asphalt mixture paving thickness detection device for asphalt pavement construction, comprising a mobile trolley 1, a mobile base 2 slidably mounted on the mobile trolley 1, a displacement drive assembly 3 for driving the mobile base 2 to slide, a motor support 4 mounted above the mobile base 2, a first motor 5 mounted on the motor support 4, a telescopic device 6 connected to the output end of the first motor 5, and a detection assembly 7 connected to the output end of the telescopic device 6. With the road extension direction as the longitudinal direction, the movement direction of the mobile trolley 1 is not limited to the lateral direction; it can also be omnidirectional. The mobile base 2 has an L-shaped cross-section; the horizontal plate is used for connection and cooperation with the mobile trolley 1, and the vertical plate is used for mounting the detection assembly 7, etc. The output shaft of the first motor 5 is lateral, which can drive the main body of the telescopic device 6, along with the detection assembly 7, to swing together.

[0028] Specifically, in some specific embodiments, the mobile trolley 1 can move laterally along the road surface, the mobile base 2 can move longitudinally along the road surface under the drive of the displacement drive component 3, the first motor 5 can drive the telescopic device 6 to rotate, thereby the telescopic device 6 can drive the detection component 7 connected to it to rotate, so as to cope with the road surface with different slopes, so that the probe 11 of the detection component 7 can always be perpendicular to the road surface, making its detection accuracy higher.

[0029] The detection component 7 disclosed in this invention includes a bracket 8, a support ring 9 fixed to the bracket 8, six connecting pieces 10 evenly distributed in a ring on the inner side of the support ring 9, and a probe 11 connected to the connecting pieces 10 and coaxially fixed at the center of the support ring 9. The probe 11 extends downward in a vertical direction, and a pressure sensor 12 is installed at the lower end of the probe 11. A sleeve 13 is slidably arranged on the outer side of the probe 11. The sleeve 13 extends along the axial direction of the probe 11, and a limiting pressure plate 14 is fixed at the lower end of the sleeve 13. The limiting pressure plate 14 is made of steel plate to reduce adhesion to asphalt.

[0030] A displacement sensor 15 is installed on the limiting pressure plate 14. When the limiting pressure plate 14 moves, the displacement length of the limiting pressure plate 14 can be accurately measured. A limiting piece 16 is fixed to the lower part of the probe 11. A spring 17 is connected between the limiting piece 16 and the limiting pressure plate 14. The spring 17 provides elastic support for the limiting pressure plate 14. The outer side of the sleeve 13 is provided with grooves 18 for the connecting piece 10 and the limiting piece 16 to make way for each other. The telescopic device 6 drives the detection component 7 to move along the normal direction of the asphalt pavement. The asphalt surface acts on the limiting pressure plate 14 and causes the spring 17 to deform. After the probe 11 reaches the bottom of the asphalt pavement, the pressure sensor 12 sends a signal and drives the telescopic device 6 to stop through the controller. The displacement value of the displacement sensor 15 is recorded at this time. Using the device disclosed in this invention, the contact area between the probe 11 and the asphalt mixture is small, which can accurately insert into the bottom of the paving layer. The paving thickness can be detected without waiting for the asphalt mixture to cure. It can realize simultaneous paving and detection, thus improving the detection efficiency.

[0031] In this embodiment, the lower end of the probe 11 is provided with a mounting groove 19 for mounting the pressure sensor 12. The mounting groove 19 is filled with an elastic support block 20, which supports the pressure sensor 12. By providing the elastic support block 20, the pressure sensor 12 can be elastically supported, thereby providing a certain degree of protection for the pressure sensor 12 and improving the lifespan of the device.

[0032] In this embodiment, an arc-shaped plate 21 is fixed to the outer end of the limiting plate 16. Each limiting plate 16 is equipped with a corresponding arc-shaped plate 21, so there are 6 arc-shaped plates 21. The arc-shaped plates 21 extend vertically and are formed on the circumference of the same cylindrical tube. The lower end of the arc-shaped plate 21 is flush with the lower end of the probe 11. By setting the arc-shaped plate 21, it can limit the movement of the sleeve 13 when the probe 11 is inserted, preventing the asphalt inside the cylindrical tube from spreading outward due to the pressure of the limiting pressure plate 14, thus making the detection of the asphalt mixture paving thickness more accurate.

[0033] In some other embodiments, an ultrasonic thickness gauge is also installed on the upper outer side of the arc plate 21. The ultrasonic thickness gauge is mainly used to calibrate the thickness measured by the displacement sensor 15. When the two values ​​are consistent, the accuracy of the measurement can be basically guaranteed. When there is a deviation between the two measured values, it is necessary to inspect and maintain them separately.

[0034] In this embodiment, the limiting pressure plate 14 is circular, and the outer side of the limiting pressure plate 14 slides in conjunction with the inner side of the arc plate 21, which can limit the limiting pressure plate 14 and prevent asphalt from flowing into the upper part of the limiting pressure plate 14 and affecting the detection accuracy.

[0035] In this embodiment, a vibrating plate 22 is fixedly connected to the outer side of the arc plate 21. The vibrating plate 22 is connected to a power source, which can activate the vibrating plate 22 when the arc plate 21 is inserted, making the insertion of the arc plate 21 easier.

[0036] In this embodiment, a blower pipe 24 is fixedly connected to the outer side of the sleeve 13 via a support rod 23. The upper end of the blower pipe 24 is connected to a blower via a pipe, and the middle part of the blower pipe 24 is slidably disposed within a sliding sleeve 25 fixed to the outer side of the arc plate 21. By setting the blower pipe 24, after the sleeve 13 and the probe 11 are pulled out, the blower pipe 24 blows air downwards, accelerating the flow of asphalt, so that the remaining insertion holes after the arc plate 21 and the probe 11 are removed are promptly sealed by the flow of asphalt, ensuring the aesthetics of the road surface.

[0037] In this embodiment, a limiting plate 26 is fixedly connected to the upper end of the probe 11. The outer diameter of the limiting plate 26 is larger than the inner diameter of the sleeve 13, which is used to limit the probe 11.

[0038] In this embodiment, rotating shafts are fixed on both sides of the movable base 2. The rotating shafts are evenly spaced along the longitudinal direction. Rollers 27 are rotatably connected to both ends of the rotating shafts. A limiting groove 28 that cooperates with the rollers 27 is opened on the upper side of the movable trolley 1. The displacement driving assembly 3 includes a rack 29 fixed on the upper surface of the movable base 2, a gear 30 meshing with the rack 29, and a second motor 31 that drives the gear 30 to rotate. The second motor 31 is fixed on the movable trolley 1.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A device for detecting the paving thickness of asphalt mixture in asphalt pavement construction, characterized in that: The system includes a mobile trolley, a mobile base slidably mounted on the trolley, a displacement drive assembly for driving the mobile base to slide, a motor support mounted above the mobile base, a first motor mounted on the motor support, a telescopic device connected to the output end of the first motor, and a detection assembly connected to the output end of the telescopic device. The mobile trolley moves laterally along the road surface, and the mobile base can move longitudinally along the road surface under the drive of the displacement drive assembly. The first motor drives the telescopic device to rotate. The detection assembly includes a bracket, a support ring fixed to the bracket, several connecting pieces evenly distributed in a ring on the inner side of the support ring, and a probe connected to the connecting pieces and coaxially fixed to the center of the support ring. The probe extends downward in a vertical direction, and a pressure sensor is installed at the lower end of the probe. A sleeve is slidably mounted on the outer side of the probe, and a limit plate is fixed at the lower end of the sleeve. A pressure sensor is mounted on the limit plate. Equipped with a displacement sensor, the probe has a limiting plate fixed to its lower part, and a spring connecting the limiting plate and the limiting pressure plate. The outer side of the sleeve has grooves for the connecting plate and the limiting plate to make way for each other. The telescopic device drives the detection component to move along the normal direction of the asphalt pavement. The asphalt mixture on the surface of the paved layer acts on the limiting pressure plate and causes the spring to deform. After the probe reaches the bottom of the paved layer, the pressure sensor sends a signal, which drives the telescopic device to stop via the controller, recording the displacement value of the displacement sensor at this time. The lower end of the probe has a mounting groove for installing the pressure sensor, filled with an elastic support block to support the pressure sensor. An arc-shaped plate is fixed to the outer end of the limiting plate, extending vertically. Each arc-shaped plate is formed on the circumference of the same cylindrical tube, and the lower end of the arc-shaped plate is flush with the lower end of the probe.

2. The asphalt mixture paving thickness detection device for asphalt pavement construction according to claim 1, characterized in that: The limiting pressure plate is circular, and the outer side of the limiting pressure plate slides in conjunction with the inner side of the arc-shaped plate.

3. The asphalt mixture paving thickness detection device for asphalt pavement construction according to claim 1, characterized in that: A vibrating plate is fixedly connected to the outer side of the arc-shaped plate, and the vibrating plate is connected to a power source.

4. The asphalt mixture paving thickness detection device for asphalt pavement construction according to claim 1, characterized in that: A blower pipe is fixedly connected to the outer side of the sleeve by a support rod. The upper end of the blower pipe is connected to the blower through a pipe. The middle part of the blower pipe is slidably disposed in a sliding sleeve fixed to the outer side of the arc plate.

5. A device for detecting the paving thickness of asphalt mixture for asphalt pavement construction according to any one of claims 1-4, characterized in that: The upper end of the probe is fixedly connected to a limiting plate, the outer diameter of which is larger than the inner diameter of the sleeve.

6. A device for detecting the paving thickness of asphalt mixture for asphalt pavement construction according to any one of claims 1-4, characterized in that: The movable base has rotating shafts fixed on both sides, and the rotating shafts are evenly spaced along the longitudinal direction. Rollers are rotatably connected to both ends of the rotating shafts. The upper side of the movable trolley has a limiting groove that cooperates with the rollers. The displacement driving assembly includes a rack fixed on the upper surface of the movable base, a gear meshing with the rack, and a second motor that drives the gear to rotate. The second motor is fixed on the movable trolley.

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