Asphalt pavement vertical milling experiment device and experiment method
By designing the vertical milling experimental device of asphalt pavement, the flexible adjustment of the milling mechanism is achieved by using lifting and lateral shifting mechanisms, the problem of lack of flexibility and adjustability of existing milling machines is solved, and an efficient and simple experimental process is achieved.
Patent Information
- Application Number
- CN202510094529.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-04-18
AI Technical Summary
The existing milling machines lack flexibility and adjustability, which increases the burden of manual operation, resulting in cumbersome experimental process and high time consumption.
A vertical milling experimental device for asphalt pavement is designed, including the main frame, the adjustment mechanism and the milling mechanism. A fixing frame is set at the bottom of the main frame body, a mounting frame is set at the top, and a milling mechanism is set longitudinally on the mounting frame. The adjustment mechanism includes a lifting mechanism, a transverse shifting mechanism and a control module. The vertical and horizontal adjustment of the milling mechanism is realized through the control module.
The simulation and experiment of asphalt pavement milling operations are realized, and the vertical and horizontal adjustment methods are available without human intervention. The experimental process is simple and efficient.
Smart Images
Figure CN119845623A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of road repair, and more specifically, relates to an asphalt road surface vertical milling experimental device and an experimental method. Background Art
[0002] The milling devices for asphalt pavements are mostly traditional on-site operation machines, and there is a lack of a systematic experimental platform for simulating and evaluating the effects under different milling conditions. This leads to the structural optimization of the milling devices usually relying on experience or theoretical calculations, lacking precise experimental basis, and making it difficult to determine a comprehensive and scientific direction for improvement.
[0003] Milling machines are mostly designed with traditional mechanical structures, which lack flexibility and adjustability, and cannot quickly adjust experimental parameters or optimize functions. This makes it impossible for the equipment to make efficient and accurate adjustments when facing different experimental requirements. In addition, traditional milling machines lack intelligent and automated support, which not only limits the precise movement capability of the equipment, but also increases the burden of manual operation, resulting in cumbersome and time-consuming experimental processes. Summary of the invention
[0004] The purpose of the present invention is to provide an asphalt pavement vertical milling experimental device, aiming to solve the problems that the existing milling machines lack flexibility and adjustability, increase the burden of manual operation, and lead to cumbersome experimental process and long time consumption.
[0005] To achieve the above purpose, the technical solution adopted by the present invention is: to provide an asphalt pavement vertical milling experimental device, comprising: A main frame, a fixing frame is arranged at the bottom of the main frame, the fixing frame is used to fix the asphalt rutting plate, a mounting frame is arranged at the top of the main frame, a milling mechanism is longitudinally arranged on the mounting frame, and the working end of the milling mechanism is located at the bottom and is used to perform milling operation on the asphalt rutting plate; The adjusting mechanism includes a lifting mechanism, a transverse movement mechanism and a control module. The lifting mechanism is longitudinally connected to the mounting frame and the milling mechanism. The lifting mechanism is used to drive the milling mechanism to lift and lower. The transverse movement mechanism is laterally installed on the upper part of the main frame. The transverse movement mechanism is connected to the mounting frame. The transverse movement mechanism is used to drive the milling mechanism to move laterally through the mounting frame. The control module is installed on the main frame. The control module is used to control the stroke of the lifting mechanism and the transverse movement mechanism.
[0006] In a possible implementation, the main frame includes: A bottom frame, wherein a cross reinforcing rib is arranged inside the bottom frame, and the fixing frame is arranged on the bottom frame; Four longitudinal beams, the four longitudinal beams are respectively fixed longitudinally at the upper end corners of the bottom frame, each of the longitudinal beams and the bottom frame are provided with oblique reinforcing ribs, and the upper parts of the two opposite longitudinal beams are provided with transverse reinforcing ribs, the transverse movement mechanism is arranged at the upper part of the longitudinal beam, the control module is arranged at the top of the longitudinal beam, and the mounting frame is located between the four longitudinal beams.
[0007] In a possible implementation, the fixing frame includes: A bottom plate, the bottom plate is welded to the upper end of the cross reinforcement rib, and the upper end surface of the bottom plate is provided with a placement area for supporting the asphalt rutting plate; A plurality of fixing members, wherein the plurality of fixing members are arranged in the circumference of the placement area, the fixing members are pressed on the corners of the asphalt rutting plate and are height-adjustable relative to the bottom plate; A plurality of top plates are arranged in the circumference of the placement area, and any one of the top plates is located between two adjacent fixing members, for laterally supporting the asphalt rutting plate.
[0008] In a possible implementation, the mounting frame includes: Two mounting beams, the two mounting beams are arranged in parallel and spaced apart on the top of the main frame, and the transverse movement mechanism connects the two mounting beams; Two portal frames are provided, with the two portal frames opening downward and arranged longitudinally and parallelly on the two mounting beams; the milling mechanism is located between the two portal frames; and the lifting mechanism is connected to the portal frames.
[0009] In a possible implementation, the lifting mechanism includes two lifting hydraulic cylinders, which are longitudinally arranged on both sides of the milling mechanism, and the upper ends of the two lifting hydraulic cylinders are hinged to the upper ends of the two portal frames one by one, and the lower ends of the two lifting hydraulic cylinders are hinged to both sides of the milling mechanism.
[0010] In a possible implementation, the transverse movement mechanism includes: Two transverse guide rails, the two transverse guide rails are respectively located on the outsides of the two portal frames, the two ends of the transverse guide rails are vertically installed on the upper parts of the two adjacent longitudinal beams, the sliding sleeves on the transverse guide rails are provided with transverse sliding sleeves, and the portal frames are connected to the transverse sliding sleeves on the same side; Two transverse hydraulic cylinders are respectively located on the outsides of the two portal frames, and the transverse hydraulic cylinders are laterally arranged below the transverse guide rails. One end of the transverse hydraulic cylinder is hinged to one side of the longitudinal beam, and the other end of the transverse hydraulic cylinder is hinged to the transverse sleeve on the same side.
[0011] In a possible implementation, the control module includes: A fixed beam, the fixed beam being transversely mounted on the upper end of any of the longitudinal beams; A plurality of hydraulic valves, which are sequentially installed transversely at the lower end of the fixed beam and are used to control the hydraulic pressure of the lifting hydraulic cylinder and the lateral hydraulic cylinder respectively; A plurality of hydraulic pressure gauges are installed transversely on the upper end of the fixed beam in sequence, and are used to respectively display the pressure values of the lifting hydraulic cylinder and the transverse hydraulic cylinder.
[0012] In a possible implementation, the milling mechanism includes: An outer shell, the lower ends of the two lifting hydraulic cylinders are hinged on both sides of the outer shell; A milling cutter shaft, wherein the milling cutter shaft longitudinally penetrates the outer shell, the interior of the milling cutter shaft is provided with a hollow passage, a milling cutter head is provided at the lower end of the milling cutter shaft, and a driven gear is circumferentially provided at the upper end of the milling cutter shaft; A power assembly includes a rotary hydraulic motor arranged on one side of the upper end of the milling cutter shaft, the rotary hydraulic motor has a longitudinal driving shaft, a driving gear is circumferentially arranged on the upper end of the driving shaft, and the driving gear is meshed with the driven gear.
[0013] In one possible implementation, a plurality of milling surfaces are circumferentially arranged on the lower end surface of the milling cutter head, each of the milling surfaces includes a horizontal milling surface and an inclined milling surface connected in sequence, a milling notch is formed between the horizontal milling surface and the inclined milling surface adjacent to two milling surfaces, a plurality of milling cutter groups are circumferentially arranged on the outer wall of the milling cutter head, the plurality of milling cutter groups correspond one-to-one to the plurality of milling surfaces, and each of the milling cutter groups has a cutting head arranged along the horizontal milling surface and the inclined milling surface of the corresponding milling surface.
[0014] The beneficial effects of the asphalt pavement vertical milling experimental device provided by the present invention are as follows: compared with the prior art, a fixed frame is arranged at the bottom of the main frame, an asphalt rutting plate is fixed on the fixed frame, a mounting frame is arranged at the top of the main frame, a milling mechanism is longitudinally arranged on the mounting frame; a lifting mechanism longitudinally connects the mounting frame and the milling mechanism, a transverse mechanism is transversely installed on the upper part of the main frame, the transverse mechanism is connected to the mounting frame, a control module is installed on the main frame, and the control module is used to control the stroke of the lifting mechanism and the transverse mechanism. The control module controls the transverse mechanism and the lifting mechanism to drive the milling mechanism to lift and move laterally, so as to perform the milling operation on the asphalt rutting plate, thereby realizing the milling operation of the simulated asphalt pavement. The asphalt pavement vertical milling experimental device provided by the present invention has longitudinal and transverse adjustment methods, does not require human intervention, and the experimental process is simple and efficient.
[0015] The present invention also provides an asphalt pavement vertical milling test method, which is characterized in that the asphalt pavement vertical milling test device is used, and the method comprises the following steps: S1: Fix the asphalt rutting plate on the fixing frame; S2: measuring the temperature and ambient humidity of the asphalt rutting plate; S3: Use the control module to control the lifting mechanism to drive the milling mechanism to move longitudinally, so that the working end of the milling mechanism is 50 mm lower than the upper surface of the asphalt rutting plate; S4: Start the milling mechanism, use the control module to control the transverse movement mechanism to drive the milling mechanism to move transversely, so that the milling mechanism mills the asphalt rutting plate along a predetermined trajectory, and use the control module to control the lifting mechanism to synchronously adjust the milling depth of the asphalt rutting plate to 60-100mm; S5: using a camera to record the milling operation in step S3 and step S4, while monitoring the rotation speed and feed speed of the working end of the milling mechanism; S6: Turn off the milling mechanism, and use the control module to control the transverse mechanism and the lifting mechanism to drive the milling mechanism to reset.
[0016] The beneficial effect of the asphalt pavement vertical milling experimental method provided by the present invention is that: compared with the prior art, since the above-mentioned asphalt pavement vertical milling experimental device is used, it has the same beneficial effect as the asphalt pavement vertical milling experimental device. In addition, the asphalt pavement vertical milling experimental method provided by the present invention also integrates the influencing factors of multiple variables, such as temperature, humidity, milling depth, etc., and can comprehensively simulate and analyze the interaction of various parameters in the asphalt pavement milling process, thereby improving the accuracy and comprehensiveness of the experimental results; it can accurately adjust the milling mechanism to ensure the stability and efficiency of the equipment; it adopts an intelligent control system and modular design, which can adjust the experimental parameters in real time, reduce human errors, reduce the operating burden, improve the experimental accuracy, safety and efficiency, and at the same time reduce manual operations and shorten the experimental time, thereby improving the overall work efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of the structure of an asphalt pavement vertical milling experimental device provided by the present invention Figure 1 ; Figure 2A schematic diagram of the structure of an asphalt pavement vertical milling experimental device provided by the present invention Figure 2 ; Figure 3 A schematic diagram of the structure of a milling mechanism provided in an embodiment of the present invention; Figure 4 A top view of a milling mechanism provided by an embodiment of the present invention; Figure 5 for Figure 4 Sectional view along AA; Figure 6 A top view of a milling cutter head provided in an embodiment of the present invention.
[0019] In the figure: 1. bottom frame; 2. cross reinforcement ribs; 3. longitudinal beams; 4. oblique reinforcement ribs; 5. transverse reinforcement ribs; 6. bottom plate; 7. connection frame; 8. fixed pressure angle; 9. lifting rod; 10. mounting beam; 11. portal frame; 12. lifting hydraulic cylinder; 13. transverse guide rail; 14. transverse sliding sleeve; 15. transverse hydraulic cylinder; 16. fixed beam; 17. hydraulic valve; 18. hydraulic pressure gauge; 19. outer shell; 20. milling cutter shaft; 21. rotary hydraulic motor; 22. driving shaft; 23. driving gear; 24. driven gear; 25. horizontal milling surface; 26. inclined milling surface; 27. milling notch; 28. cutting head; 29. upper shell. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0021] Unless explicitly defined otherwise, the use of terms such as "first," "second," or "third," etc., are intended to distinguish different objects rather than to describe a specific order.
[0022] Unless otherwise expressly defined, directional words such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", "high", "low", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, so they cannot be understood as limiting the specific scope of protection of the present invention.
[0023] See also Figure 1 and Figure 2, now an asphalt pavement vertical milling experimental device provided by the present invention is described. An asphalt pavement vertical milling experimental device includes a main frame and an adjusting mechanism. A fixed frame is arranged at the bottom of the main frame, and the fixed frame is used to fix the asphalt rutting plate. A mounting frame is arranged at the top of the main frame, and a milling mechanism is longitudinally arranged on the mounting frame. The working end of the milling mechanism is located at the lower part and is used to perform milling operations on the asphalt rutting plate; the adjusting mechanism includes a lifting mechanism, a transverse movement mechanism and a control module. The lifting mechanism longitudinally connects the mounting frame and the milling mechanism, and the lifting mechanism is used to drive the milling mechanism to lift and lower. The transverse movement mechanism is transversely installed on the upper part of the main frame, and the transverse movement mechanism is connected to the mounting frame. The transverse movement mechanism is used to drive the milling mechanism to move transversely through the mounting frame. The control module is installed on the main frame, and the control module is used to control the stroke of the lifting mechanism and the transverse movement mechanism.
[0024] The present invention provides an asphalt pavement vertical milling experimental device. Compared with the prior art, a fixed frame is arranged at the bottom of the main frame, an asphalt rutting plate is fixed on the fixed frame, a mounting frame is arranged at the top of the main frame, a milling mechanism is longitudinally arranged on the mounting frame; a lifting mechanism longitudinally connects the mounting frame and the milling mechanism, a transverse mechanism is transversely installed on the upper part of the main frame, the transverse mechanism is connected to the mounting frame, a control module is installed on the main frame, and the control module is used to control the stroke of the lifting mechanism and the transverse mechanism. The control module controls the transverse mechanism and the lifting mechanism to drive the milling mechanism to lift and move laterally, so as to perform the milling operation on the asphalt rutting plate, thereby realizing the milling operation of the simulated asphalt pavement. The present invention provides an asphalt pavement vertical milling experimental device, which has longitudinal and transverse adjustment methods, does not require human intervention, and has a simple experimental process and high efficiency.
[0025] See also Figure 1 to Figure 2 The main frame includes a bottom frame 1 and four longitudinal beams 3. The bottom frame 1 is a rectangular frame, and cross reinforcement ribs 2 are arranged in the bottom frame 1 in a horizontal and vertical staggered manner. The arrangement of the cross reinforcement ribs 2 further enhances the stability of the structure. The cross reinforcement ribs 2 arranged in a horizontal and vertical staggered manner can divide the bottom frame 1 into multiple small areas. When subjected to external pressure or impact force, these reinforcement ribs can evenly distribute the force to the entire bottom frame 1. Just like in a grid structure, each intersection can play a role in sharing the force. The fixing frame is arranged on the bottom frame 1, which can be used to install the asphalt rutting plate. The four longitudinal beams 3 are respectively fixed longitudinally to the upper end face corners of the bottom frame 1, and the bottom of the longitudinal beams 3 is welded and fixed. Each longitudinal beam 3 and the bottom frame 1 are provided with oblique reinforcement ribs 4, and the two ends of the oblique reinforcement ribs 4 are respectively connected and fixed to the longitudinal beams 3 and the bottom frame 1 through connecting plates. The upper parts of the two opposite longitudinal beams 3 are provided with transverse reinforcement ribs 5, and the two ends of the transverse reinforcement ribs 5 are respectively connected and fixed to the longitudinal beams 3 on both sides through connecting plates. The transverse movement mechanism is arranged on the upper part of the longitudinal beam 3 , the control module is arranged on the top of the longitudinal beam 3 , and the mounting frame is located between the four longitudinal beams 3 .
[0026] See also Figure 1 and Figure 2 The fixing frame includes a bottom plate 6, a plurality of fixings and a plurality of top plates. The bottom plate 6 is welded to the upper end of the cross reinforcement rib 2, and a connecting frame 7 is welded to the lower end surface of the bottom plate 6. The connecting frame 7 is provided with a plurality of notches in the area corresponding to the cross reinforcement rib 2, and the connecting frame 7 is welded to the side wall of the cross reinforcement rib 2 with the aid of the plurality of notches. The upper end surface of the bottom plate 6 is provided with a placement area for supporting the asphalt rutting plate, which provides a flat and stable placement platform for the asphalt rutting plate, ensuring that the rutting plate can maintain the correct position and posture during subsequent operations. A plurality of fixings are arranged in the circumference of the placement area, and the fixings are pressed on the corners of the asphalt rutting plate and are adjustable in height relative to the bottom plate 6. In this way, a uniform and stable pressure can be applied to the rutting plate, thereby effectively preventing the rutting plate from displacement or shaking in the placement area. More importantly, the fixings are adjustable in height relative to the bottom plate 6. This unique design feature gives the fixings great flexibility. Asphalt rutting plates of different specifications or thicknesses can be precisely fixed by adjusting the height of the fixings, ensuring that the fixing effect is not affected by the size difference of the rutting plates. A plurality of top plates are arranged in the circumference of the placement area, and any top plate is located between two adjacent fixings, for laterally supporting the asphalt rutting plate. The plurality of top plates form a tight and orderly arrangement. The main function of the top plate is to provide lateral support for the asphalt rutting plate. In actual use, the asphalt rutting plate may be subjected to external forces from the side, such as vibrations during transportation, collisions during operation, etc. At this time, the top plate can play its important role, effectively resist these lateral forces, maintain the stability of the rutting plate, and prevent it from shifting or tilting under the action of lateral forces, further improving the fixing effect of the fixing frame on the asphalt rutting plate.
[0027] Specifically, the fixing part includes a fixed pressure angle 8 and a lifting rod 9. The inner side of the fixed pressure angle 8 forms a right-angle structure, which is pressed and mounted on the corner of the asphalt rutting plate. The lifting rod 9 adopts a screw rod, which longitudinally penetrates the fixed pressure angle 8 and the bottom plate 6, so as to adjust the height of the fixed pressure angle 8, thereby matching asphalt rutting plates of different thicknesses. In addition, a plurality of hole positions are set on the bottom plate 6, so that different hole positions can be selected to match asphalt rutting plates of different specifications.
[0028] See also Figure 1 and Figure 2The mounting frame includes two mounting beams 10 and two portal frames 11. The two mounting beams 10 are arranged at intervals on the top of the main frame in a horizontal direction and in parallel. The two mounting beams 10 make full use of the space on the top of the main frame, provide a stable basic platform for the installation of subsequent components, and ensure the uniform force of the overall structure in the horizontal direction. The transverse movement mechanism connects the two mounting beams 10. The two portal frames 11 are arranged on the two mounting beams 10 in a longitudinal direction and in parallel with the openings facing downward. The milling mechanism is located between the two portal frames 11. This longitudinal parallel arrangement enables the portal frames 11 to flexibly adjust their positions along the longitudinal direction of the mounting beams 10, providing a flexible layout space for the components carried inside. The milling mechanism is precisely placed between the two portal frames 11. The portal frame 11 provides a stable lateral support for the milling mechanism, ensuring that the milling mechanism will not shake or deflect due to uneven lateral force when performing milling operations at high speed, thereby ensuring the accuracy and quality of the milling operation. The lifting mechanism is connected to the portal frames 11.
[0029] The lifting mechanism includes two lifting hydraulic cylinders 12, which are longitudinally arranged on both sides of the milling mechanism. This layout allows the milling mechanism to be subjected to uniform force during the lifting process, avoiding tilting or shaking caused by uneven force, thereby ensuring high precision of the milling operation. The upper ends of the two lifting hydraulic cylinders 12 are hinged to the upper ends of the two portal frames 11 one by one, and the lower ends of the two lifting hydraulic cylinders 12 are hinged to both sides of the milling mechanism. When the milling mechanism needs to be lifted, the hydraulic oil inside the lifting hydraulic cylinder 12 pushes the piston upward under pressure, causing the cylinder to extend. Since the upper end of the cylinder is hinged to the portal frame 11 and the lower end is hinged to the milling mechanism, the milling mechanism will be lifted upward smoothly as the cylinder extends. On the contrary, when the milling mechanism needs to be lowered, the hydraulic oil flows back under control, the piston moves downward under the action of the milling mechanism's own gravity and external load, and the cylinder shortens, thereby achieving a smooth descent of the milling mechanism.
[0030] Specifically, the lifting hydraulic cylinder 12 has two stages, the inner diameter of the first-stage cylinder is 90mm, the cylinder model is LQ1800-1702L, the rod diameter is 80 / 50mm, the first-stage stroke is 562mm, and the minimum diameter of the second-stage cylinder is 52mm, the rod diameter is 50mm, and the second-stage stroke is 600mm.
[0031] Specifically, the transverse movement mechanism includes two transverse guide rails 13 and two transverse hydraulic cylinders 15. The two transverse guide rails 13 are respectively located on the outside of the two portal frames 11. The two ends of the transverse guide rails 13 are vertically installed on the upper part of the two adjacent longitudinal beams 3. The sliding sleeves on the transverse guide rails 13 are provided with transverse sliding sleeves 14. The portal frame 11 is connected to the transverse sliding sleeves 14 on the same side, so that it can move smoothly on the transverse guide rails 13 along with the transverse sliding sleeves 14. This sliding connection method not only ensures the flexibility of the movement of the portal frame 11, but also ensures that the movement direction of the portal frame 11 always maintains a precise transverse straight line through the constraints of the transverse guide rails 13, avoiding deviation and shaking. The two transverse hydraulic cylinders 15 are respectively located on the outside of the two portal frames 11. The transverse hydraulic cylinders 15 are laterally arranged below the transverse guide rails 13 and arranged parallel to the transverse guide rails 13. One end of the lateral hydraulic cylinder 15 is hinged to one side of a longitudinal beam 3. This hinged connection provides a certain degree of rotational freedom for the cylinder, so that the cylinder can be adaptively adjusted according to the movement of the portal frame 11 during operation, avoiding stress concentration and movement obstruction caused by rigid connection. The other end of the lateral hydraulic cylinder 15 is hinged to the lateral sliding sleeve 14 on the same side. Through this connection, the lateral hydraulic cylinder 15 can directly drive the lateral sliding sleeve 14 to move on the transverse guide rail 13. When the lateral hydraulic cylinder 15 is working, the hydraulic oil inside pushes the piston to move under the pressure, so that the piston rod of the cylinder extends or retracts. When the piston rod extends, it pushes the lateral sliding sleeve 14 to move along the transverse guide rail 13 away from the longitudinal beam 3, thereby driving the portal frame 11 connected thereto to move synchronously; when the piston rod retracts, the lateral sliding sleeve 14 moves toward the longitudinal beam 3 under the pulling force of the cylinder, and the portal frame 11 also returns accordingly, realizing the lateral movement of the milling mechanism.
[0032] Specifically, the model of the transverse hydraulic cylinder 15 is a telescopic cylinder of LQ1800-1701L, and its parameters are cylinder diameter D=80mm, rod diameter d=50mm, and stroke 1340mm.
[0033] Specifically, the control module includes a fixed beam 16, a plurality of hydraulic valves 17, and a plurality of hydraulic pressure gauges 18. The fixed beam 16 is transversely installed at the upper end of any longitudinal beam 3. As the basic bearing component of the control module, the fixed beam 16 is firmly connected to the entire equipment frame and reasonably utilizes the spatial position of the longitudinal beam 3, so that the control module can easily obtain the required support and installation foundation without affecting the overall structural layout of the equipment. At the same time, the transverse installation direction of the fixed beam 16 also echoes the layout of other transverse components in the equipment, which helps to improve the structural coordination and aesthetics of the entire equipment. A plurality of hydraulic valves 17 are transversely installed at the lower end of the fixed beam 16 in sequence, and are used to control the hydraulic pressure of the lifting hydraulic cylinder 12 and the lateral hydraulic cylinder 15 respectively. The plurality of hydraulic valves 17 undertake the key task of controlling the hydraulic pressure of the lifting hydraulic cylinder 12 and the lateral hydraulic cylinder 15 respectively. Each hydraulic valve 17 can accurately adjust the flow and pressure of the hydraulic oil flowing through the lifting hydraulic cylinder 12 and the lateral hydraulic cylinder 15. By operating the hydraulic valve 17, the operator can flexibly adjust the lifting speed and carrying capacity of the lifting hydraulic cylinder 12, as well as the lateral speed and thrust of the lateral hydraulic cylinder 15 according to actual operation requirements. For example, when performing milling operations, if the height of the milling mechanism needs to be adjusted, the operator only needs to control the corresponding hydraulic valve 17 to accurately change the hydraulic pressure of the lifting hydraulic cylinder 12, thereby achieving smooth lifting and lowering of the milling mechanism. The lateral arrangement of these hydraulic valves 17 is not only convenient for installation and maintenance, but also enables the operator to intuitively identify and operate each hydraulic valve 17, thereby improving the convenience and accuracy of operation. At the same time, the centralized installation of the hydraulic valves 17 also helps to optimize the pipeline layout of the hydraulic system, reduce the length and complexity of the pipeline, reduce the risk of hydraulic oil leakage, and improve the reliability and stability of the entire hydraulic system. Multiple hydraulic pressure gauges 18 are sequentially installed horizontally at the upper end of the fixed beam 16 to display the pressure values of the lifting hydraulic cylinder 12 and the lateral hydraulic cylinder 15 respectively. Multiple hydraulic pressures display the pressure values of the lifting hydraulic cylinder 12 and the lateral hydraulic cylinder 15 in real time and accurately. Each hydraulic pressure gauge 18 is closely connected to the corresponding hydraulic cylinder, and can accurately sense the pressure changes inside the hydraulic cylinder and present it to the operator in an intuitive numerical form. By observing the readings of the hydraulic pressure gauge 18, the operator can promptly understand the working status of the hydraulic cylinder and determine whether the hydraulic system is operating normally. For example, when the value displayed by the hydraulic pressure gauge 18 exceeds or falls below the normal range, the operator can quickly determine possible problems, such as hydraulic oil leakage, hydraulic pump failure, etc., and take appropriate measures to troubleshoot and repair them in a timely manner. This real-time monitoring and feedback mechanism can effectively avoid equipment damage or safety accidents caused by hydraulic system failures, ensuring that the equipment is always in a safe and stable operating state.The horizontal installation of the hydraulic pressure gauge 18 also follows the principle of easy observation and operation, and echoes the layout of the hydraulic valve 17, so that the operator can easily observe the pressure changes of the corresponding hydraulic cylinder while operating the hydraulic valve 17, thereby achieving precise control and real-time monitoring of the equipment hydraulic system.
[0034] See also Figures 3 to 5 The milling mechanism includes an outer shell 19, a milling cutter shaft 20 and a power assembly. The lower ends of the two lifting hydraulic cylinders 12 are hinged on both sides of the outer shell 19. This connection method enables the milling mechanism to achieve vertical lifting and lowering movements under the drive of the lifting hydraulic cylinders 12. During the milling operation, the outer shell 19 can withstand various reaction forces from the milling process to ensure the safety and stability of the internal components. Moreover, the design of the outer shell 19 may take into account the prevention of waste splashing generated by milling, play a certain protective role, and ensure the safety of the operating environment. The milling cutter shaft 20 runs through the outer shell 19 longitudinally, and the interior of the milling cutter shaft 20 is provided with a hollow channel, which can be used to discharge the waste generated by milling, making the milling process smoother. A milling cutter head is provided at the lower end of the milling cutter shaft 20, and a driven gear 24 is circumferentially provided at the upper end of the milling cutter shaft 20. The power assembly includes a rotary hydraulic motor 21 disposed on one side of the upper end of the milling cutter shaft 20, wherein an upper housing 29 is disposed on the upper end of the milling cutter shaft 20, the milling cutter shaft 20 passes through the upper housing 29 and a driven gear 24 is located in the upper housing 29, and the rotary hydraulic motor 21 is installed in the upper housing 29, and the rotary hydraulic motor 21 has a longitudinal driving shaft 22, and a driving gear 23 is circumferentially disposed on the upper end of the driving shaft 22, and the driving gear 23 is meshed with the driven gear 24. When the rotary hydraulic motor 21 is started, the hydraulic system inside it will drive the driving shaft 22 to rotate, thereby driving the driving gear 23 to rotate. Since the driving gear 23 is meshed with the driven gear 24 on the milling cutter shaft 20, the power is transmitted to the milling cutter shaft 20 through gear transmission, so that the milling cutter shaft 20 starts to rotate, and the milling cutter head rotates at high speed to cut and crush the road surface.
[0035] The rotary hydraulic motor 21 is used as a power source, and its hydraulic drive has many advantages. The hydraulic drive can provide a large torque, ensuring that the milling cutter shaft 20 has sufficient power during the milling process, and can easily complete the milling task even when facing hard materials. Moreover, the hydraulic system can achieve precise control of the rotation speed by adjusting the flow and pressure of the hydraulic oil according to different work requirements, so that the rotation speed of the milling cutter shaft 20 can be flexibly adjusted to adapt to different milling conditions and material properties.
[0036] See also Figure 6The lower end surface of the milling cutter head is circumferentially provided with a plurality of milling surfaces, each of which includes a horizontal milling surface 25 and an inclined milling surface 26 connected in sequence. The horizontal milling surface 25 is mainly responsible for cutting and peeling the target material in the horizontal direction. In the milling operation, the horizontal milling surface 25 can flatten the surface of the material like a scraper, and remove the relatively flat part of the surface of the material, which plays the role of preliminary milling. The inclination angle of the inclined milling surface 26 can enable the milling cutter head to cut into the material more effectively, and cooperate with the horizontal milling surface 25 to achieve deeper and more efficient cutting of the material. It can help the milling cutter head to enter the interior of the material more easily, overcome the shear strength of the material, and achieve better milling effect. A milling notch 27 is formed between the adjacent horizontal milling surface 25 and the inclined milling surface 26 of the two milling surfaces, and the milling notch 27 provides a discharge channel for the waste generated by milling. During the milling process, as the milling cutter head rotates, the waste generated will enter the hollow channel from the milling notch 27, and will be transmitted through the hollow channel to the waste pipe connected to the top of the milling cutter head, and finally discharged. It can prevent the waste from accumulating around the cutter head and affecting the milling efficiency and the normal operation of the cutter head. A plurality of milling cutter groups are arranged circumferentially on the outer wall of the milling cutter head, and the plurality of milling cutter groups correspond to the plurality of milling surfaces one by one. Each milling cutter group has a cutter head 28 arranged along the horizontal milling surface 25 and the inclined milling surface 26 of the corresponding milling surface. The cutter head 28 arranged along the shape can make full use of the shape characteristics of the milling surface, making the milling operation more uniform and efficient. When the milling cutter head rotates, the cutter head 28 moves along the trajectory of the horizontal milling surface 25 and the inclined milling surface 26 to perform all-round milling of the material. The cutter head 28 is the actual cutting component, which has high hardness and sharp cutting edge, and can cut and crush various materials. When the milling cutter head rotates, the cutter head 28 is in constant contact with the material, cutting the surface of the material under the action of the horizontal milling surface 25, and cutting deeper into the material under the action of the inclined milling surface 26, thereby completing the entire milling process.
[0037] Based on the same inventive concept, the present invention also provides an asphalt pavement vertical milling test method, using the above-mentioned asphalt pavement vertical milling test device, comprising the following steps: S1: Fix the asphalt rutting plate on the fixing frame.
[0038] It provides a stable experimental object for subsequent milling experiments. The fixing frame can firmly support and fix the asphalt rutting plate. The placement area of the bottom plate 6 provides a placement platform for the asphalt rutting plate. The fixing parts are pressed on the corners of the rutting plate and can be adjusted in height. The top plate provides lateral support between adjacent fixing parts to ensure that the rutting plate is stable in position during the milling process, avoiding displacement or shaking due to external forces, and providing a reliable experimental basis for the experiment.
[0039] S2: Measure the temperature and ambient humidity of the asphalt rutting plate.
[0040] Temperature and humidity are important environmental factors that affect the performance and milling effect of asphalt pavement. The properties of asphalt change at different temperatures. At high temperatures, asphalt may become soft and at low temperatures, it may become brittle. The environmental humidity may affect factors such as dust generated during milling. Measuring these parameters helps to accurately analyze the experimental results and ensure the accuracy and repeatability of the experimental results.
[0041] S3: Use the control module to control the lifting mechanism to drive the milling mechanism to move longitudinally, so that the working end of the milling mechanism is 50 mm lower than the upper surface of the asphalt rutting plate.
[0042] The milling mechanism is adjusted to a suitable initial longitudinal position by the precise control of the lifting mechanism by the control module. The upper end of the lifting hydraulic cylinder 12 is hinged to the upper end of the portal frame 11, and the lower end is hinged to both sides of the outer shell 19 of the milling mechanism. The precise height adjustment can be achieved through the drive of the hydraulic system. The working end of the milling mechanism is made 50mm lower than the upper surface of the asphalt rutting board to prepare for the subsequent milling operation, ensuring that the milling mechanism can smoothly cut into the rutting board without being unable to operate normally due to being too high or causing unnecessary collisions due to being too low.
[0043] S4: Start the milling mechanism, use the control module to control the transverse movement mechanism to drive the milling mechanism to move laterally, so that the milling mechanism mills the asphalt rutting plate along a predetermined trajectory, and use the control module to control the lifting mechanism to synchronously adjust the milling depth of the asphalt rutting plate to 60-100mm.
[0044] Start the milling mechanism, the rotary hydraulic motor 21 in the milling mechanism drives the driving shaft 22 to rotate, and the engagement of the driving gear 23 and the driven gear 24 drives the milling cutter shaft 20 to rotate, and the milling cutter head at the lower end of the milling cutter shaft 20 rotates at high speed. The unique design of the milling cutter head, the horizontal milling surface 25 and the inclined milling surface 26 on the circumferential side of the lower end face, and the milling notch 27, in conjunction with the circumferential milling cutter group and the cutter head 28, can efficiently perform milling operations on asphalt rutting plates.
[0045] Control the transverse movement mechanism. Under the operation of the control module, the transverse movement mechanism makes the milling mechanism move laterally along a predetermined track. The transverse guide rail 13 provides a stable moving path for the milling mechanism, and the transverse hydraulic cylinder 15 provides power for it, so that the milling mechanism can cover the required transverse range.
[0046] Adjust the milling depth. At the same time, by controlling the module to operate the lifting mechanism, the milling depth can be adjusted between 60-100mm as needed to realize experiments with different milling depths. This can study the effects of different milling depths on the performance of asphalt rutting plates, such as the effects of milling depth on the strength, surface roughness and other properties of rutting plates.
[0047] S5: Using a camera to record the milling operations in step S3 and step S4, while monitoring the rotation speed and feed speed of the working end of the milling mechanism.
[0048] The camera recording can fully record the entire milling process, including the surface changes of the asphalt rutting plate during the milling process, the generation and discharge of milling waste, the movement trajectory of the milling mechanism, etc., providing intuitive video data for subsequent experimental analysis.
[0049] Monitor the rotation speed and feed rate. The rotation speed and feed rate of the working end of the milling mechanism are important parameters that affect the milling effect. By monitoring these parameters, we can deeply analyze the relationship between them and the milling effect (such as milling quality, milling efficiency, flatness of the milling surface, etc.) and find the optimal working parameter combination.
[0050] S6: Turn off the milling mechanism, and use the control module to control the transverse mechanism and the lifting mechanism to drive the milling mechanism to reset.
[0051] Turn off the milling mechanism and end the milling operation to avoid waste of resources and safety hazards.
[0052] Control reset, through the control module to operate the transverse mechanism and the lifting mechanism, the milling mechanism is restored to the initial position, ready for the next experiment or equipment maintenance. The transverse mechanism moves the milling mechanism back to the initial horizontal position, and the lifting mechanism lifts the milling mechanism to a safe height to prevent it from affecting subsequent operations or causing accidental damage.
[0053] The beneficial effect of the asphalt pavement vertical milling test method provided by the present invention is that: compared with the prior art, due to the use of the above-mentioned asphalt pavement vertical milling test device, it has the same beneficial effect as the asphalt pavement vertical milling test device. In addition, the asphalt pavement vertical milling test method provided by the present invention also integrates the influencing factors of multiple variables, such as temperature, humidity, milling depth, etc., and can fully simulate and analyze the interaction of various parameters in the asphalt pavement milling process, improve the accuracy and comprehensiveness of the experimental results; can accurately adjust the milling mechanism to ensure the stability and efficiency of the equipment; adopt an intelligent control system and modular design, can adjust the experimental parameters in real time, reduce human errors, reduce the operating burden, improve the experimental accuracy, safety and efficiency, and reduce manual operations and shorten the experimental time, and improve the overall work efficiency and economic benefits. This asphalt pavement vertical milling test method can systematically study the milling performance of asphalt pavement under different conditions, and provide comprehensive experimental data and scientific basis for the maintenance, repair and optimization of related projects of asphalt pavement. At the same time, it also makes full use of the designed equipment structure and control module to achieve accurate control of the milling process and comprehensive collection of experimental data.
[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A vertical milling experimental device for asphalt pavement, characterized in that: include: A main frame, a fixing frame is arranged at the bottom of the main frame, the fixing frame is used to fix the asphalt rutting plate, a mounting frame is arranged at the top of the main frame, a milling mechanism is longitudinally arranged on the mounting frame, and the working end of the milling mechanism is located at the bottom and is used to perform milling operation on the asphalt rutting plate; The adjusting mechanism includes a lifting mechanism, a transverse movement mechanism and a control module. The lifting mechanism is longitudinally connected to the mounting frame and the milling mechanism. The lifting mechanism is used to drive the milling mechanism to lift and lower. The transverse movement mechanism is laterally installed on the upper part of the main frame. The transverse movement mechanism is connected to the mounting frame. The transverse movement mechanism is used to drive the milling mechanism to move laterally through the mounting frame. The control module is installed on the main frame. The control module is used to control the stroke of the lifting mechanism and the transverse movement mechanism.
2. The asphalt pavement vertical milling experimental device according to claim 1, characterized in that: The main frame comprises: A bottom frame (1), wherein a cross reinforcing rib (2) is arranged inside the bottom frame (1), and the fixing frame is arranged on the bottom frame (1); Four longitudinal beams (3), the four longitudinal beams (3) are respectively longitudinally fixed to the upper end face corners of the bottom frame (1), each longitudinal beam (3) and the bottom frame (1) are provided with oblique reinforcing ribs (4), the upper parts of two opposite longitudinal beams (3) are provided with transverse reinforcing ribs (5), the transverse movement mechanism is arranged at the upper part of the longitudinal beam (3), the control module is arranged at the top of the longitudinal beam (3), and the mounting frame is located between the four longitudinal beams (3).
3. The asphalt pavement vertical milling experimental device as claimed in claim 2, characterized in that: The fixing frame comprises: A bottom plate (6), the bottom plate (6) being welded to the upper end of the cross reinforcement rib (2), and the upper end surface of the bottom plate (6) being provided with a placement area for supporting an asphalt rutting plate; A plurality of fixing members, the plurality of fixing members being arranged in the circumference of the placement area, the fixing members being pressed onto the corners of the asphalt rutting plate and being height-adjustable relative to the bottom plate (6); A plurality of top plates are arranged in the circumference of the placement area, and any one of the top plates is located between two adjacent fixing members, for laterally supporting the asphalt rutting plate.
4. The asphalt pavement vertical milling experimental device as claimed in claim 2, characterized in that: The mounting frame comprises: Two mounting beams (10), the two mounting beams (10) being arranged in a transverse, parallel and spaced relationship on the top of the main frame, and the transverse movement mechanism connecting the two mounting beams (10); Two portal frames (11) are provided, with the two portal frames (11) opening downward and arranged longitudinally and parallelly on the two mounting beams (10); the milling mechanism is located between the two portal frames (11); and the lifting mechanism is connected to the portal frames (11).
5. The asphalt pavement vertical milling experimental device as claimed in claim 4, characterized in that: The lifting mechanism comprises two lifting hydraulic cylinders (12), the two lifting hydraulic cylinders (12) are longitudinally arranged on both sides of the milling mechanism, the upper ends of the two lifting hydraulic cylinders (12) are hinged to the upper ends of the two portal frames (11) in a one-to-one correspondence, and the lower ends of the two lifting hydraulic cylinders (12) are hinged to both sides of the milling mechanism.
6. The asphalt pavement vertical milling experimental device according to claim 5, characterized in that: The traverse mechanism comprises: Two transverse guide rails (13), the two transverse guide rails (13) are respectively located outside the two portal frames (11), the two ends of the transverse guide rails (13) are vertically mounted on the upper parts of the two adjacent longitudinal beams (3), the sliding sleeves on the transverse guide rails (13) are provided with transverse sliding sleeves (14), and the portal frames (11) are connected to the transverse sliding sleeves (14) on the same side; Two transverse hydraulic cylinders (15), the two transverse hydraulic cylinders (15) are respectively located on the outside of the two portal frames (11), the transverse hydraulic cylinders (15) are transversely arranged below the transverse guide rail (13), one end of the transverse hydraulic cylinder (15) is hinged to one side of one of the longitudinal beams (3), and the other end of the transverse hydraulic cylinder (15) is hinged to the transverse sliding sleeve (14) on the same side.
7. The asphalt pavement vertical milling experimental device according to claim 6, characterized in that: The control module comprises: A fixed beam (16), the fixed beam (16) being transversely mounted on the upper end of any of the longitudinal beams (3); A plurality of hydraulic valves (17), wherein the plurality of hydraulic valves (17) are sequentially installed transversely at the lower end of the fixed beam (16), and are used to control the hydraulic pressure of the lifting hydraulic cylinder (12) and the lateral movement hydraulic cylinder (15) respectively; A plurality of hydraulic pressure gauges (18) are installed transversely in sequence on the upper end of the fixed beam (16) and are used to respectively display the pressure values of the lifting hydraulic cylinder (12) and the transverse hydraulic cylinder (15).
8. The asphalt pavement vertical milling experimental device as claimed in claim 5, characterized in that: The milling mechanism comprises: An outer shell (19), the lower ends of the two lifting hydraulic cylinders (12) are hinged on both sides of the outer shell (19); A milling cutter shaft (20), the milling cutter shaft (20) longitudinally penetrates the outer shell (19), the interior of the milling cutter shaft (20) is provided with a hollow passage, a milling cutter head is arranged at the lower end of the milling cutter shaft (20), and a driven gear (24) is circumferentially arranged at the upper end of the milling cutter shaft (20); A power assembly comprises a rotary hydraulic motor (21) arranged on one side of the upper end of the milling cutter shaft (20), the rotary hydraulic motor (21) having a longitudinal driving shaft (22), a driving gear (23) being arranged circumferentially at the upper end of the driving shaft (22), and the driving gear (23) being meshed with the driven gear (24).
9. The asphalt pavement vertical milling experimental device according to claim 8, characterized in that: The lower end surface of the milling cutter head is provided with a plurality of milling surfaces in the circumferential direction, each of the milling surfaces comprises a horizontal milling surface (25) and an inclined milling surface (26) connected in sequence, a milling notch (27) is formed between the horizontal milling surface (25) and the inclined milling surface (26) adjacent to two of the milling surfaces, a plurality of milling cutter groups are provided in the circumferential direction of the outer wall of the milling cutter head, the plurality of milling cutter groups correspond to the plurality of milling surfaces one by one, and each of the milling cutter groups comprises a cutting head (28) arranged along the horizontal milling surface (25) and the inclined milling surface (26) of the corresponding milling surface.
10. A vertical milling test method for asphalt pavement, characterized in that: The asphalt pavement vertical milling experimental device as described in any one of claims 1 to 9 is used, comprising the following steps: S1: Fix the asphalt rutting plate on the fixing frame; S2: measuring the temperature and ambient humidity of the asphalt rutting plate; S3: Use the control module to control the lifting mechanism to drive the milling mechanism to move longitudinally, so that the working end of the milling mechanism is 50 mm lower than the upper surface of the asphalt rutting plate; S4: Start the milling mechanism, use the control module to control the transverse movement mechanism to drive the milling mechanism to move transversely, so that the milling mechanism mills the asphalt rutting plate along a predetermined trajectory, and use the control module to control the lifting mechanism to synchronously adjust the milling depth of the asphalt rutting plate to 60-100mm; S5: using a camera to record the milling operation in step S3 and step S4, while monitoring the rotation speed and feed speed of the working end of the milling mechanism; S6: Turn off the milling mechanism, and use the control module to control the transverse mechanism and the lifting mechanism to drive the milling mechanism to reset.