Intelligent induction rubber composite modified pavement asphalt viscosity detection device
By integrating immersion, stirring, and measurement functions into a single mechanical linkage structure, the problem of bulky structure and low automation in rubber-modified asphalt testing devices has been solved, achieving efficient and accurate viscosity testing, and making it suitable for automated testing of rubber-modified asphalt.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-15
- Publication Date
- 2026-04-10
AI Technical Summary
In the existing technology, the viscosity testing device for rubber-modified asphalt is bulky, expensive, has low automation, cumbersome operation process, and poor accuracy and repeatability of test results. In particular, for highly viscous and easily segregated materials, insufficient stirring or static standing can lead to uneven sample distribution, affecting the measurement results.
The intelligent sensing rubber composite modified pavement asphalt viscosity testing device integrates immersion, stirring and measurement into the same motion system through a mechanical linkage structure. It achieves seamless connection by utilizing the threaded pair and linkage structure between the main shaft and the lifting cylinder to form a composite stirring mode of revolution and rotation, ensuring sample uniformity. The device also monitors the temperature in real time, realizing an automated and sequential testing process.
The simplified device structure reduces costs, improves the accuracy and reliability of detection, avoids sample separation and temperature fluctuations, and ensures the authenticity, reliability and efficiency of measurement results.
Smart Images
Figure CN121830385A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of physical performance testing technology for road construction materials, specifically an intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt. Background Technology
[0002] Asphalt, a key material in modern road construction, directly affects the quality and lifespan of pavements. Rubber-modified asphalt, by adding modifiers such as rubber powder to the base asphalt, can significantly improve the high and low temperature performance, anti-aging properties, and fatigue resistance of asphalt, representing an important development direction for high-performance pavement materials. Viscosity is one of the key rheological indicators of asphalt, directly reflecting the flow and deformation resistance of asphalt at construction temperatures. It is the core basis for determining the mixing, paving, and compaction process parameters. Therefore, accurate and efficient detection of the viscosity of rubber-modified asphalt is of vital engineering significance for quality control, formula optimization, and construction guidance.
[0003] At present, the rotational viscometer method is mostly used for asphalt viscosity testing. The traditional testing method usually involves placing the asphalt sample in a constant temperature container, preheating and stirring the sample with an independent stirring device, and then removing the stirring device after the temperature is uniform and the modifier is fully dispersed. The viscometer probe is then manually or through another lifting mechanism to immerse it in the asphalt liquid for measurement. This step-by-step operation mode of "stirring first and then testing" has the following drawbacks: (1) It uses two independent drive systems. One system is responsible for driving the lifting and lowering of the probe to achieve immersion and lifting, while the other system is responsible for driving the probe or an independent stirrer to rotate to complete stirring and viscosity measurement. Although this dual-power source scheme has the following drawbacks: (1) It uses two independent drive systems. One system is responsible for driving the lifting and lowering of the probe to achieve immersion and lifting, while the other system is responsible for driving the probe or an independent stirrer to rotate to complete stirring and viscosity measurement. It can be complete, but it leads to a bulky device structure and high cost. There is also a problem of synchronous control where the timing of the two drive units needs to be precisely coordinated. (2) The operation process is complicated, the degree of automation is low, there is a lot of manual intervention, and the detection efficiency is not high. Secondly, during the transfer or switching of the device, the temperature of the asphalt sample may fluctuate, affecting the stability of the measurement conditions. More importantly, for high-viscosity, easily segregated heterogeneous materials such as rubber-modified asphalt, if the stirring is insufficient or the standing time after stirring is too long, the rubber particles and other modifiers may settle or agglomerate, resulting in local unevenness of the sample during measurement. The measured viscosity value cannot truly reflect the overall performance of the material, and the data has poor representativeness and low repeatability.
[0004] To address these issues, we provide an intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt. Summary of the Invention
[0005] The purpose of this invention is to provide an intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt, which can automatically, sequentially, and efficiently complete the entire process of "immersion-thorough stirring-precise measurement". The stirring action is efficient and seamlessly connected with the measurement action, which can effectively improve the accuracy, reliability and automation level of rubber-modified asphalt viscosity detection, thereby solving the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: A smart sensing device for detecting the viscosity of rubber-modified pavement asphalt includes a frame, a main shaft rotatably mounted on the frame, a liftable lifting cylinder threadedly connected to the main shaft, a viscosity detection probe for detecting the viscosity of asphalt mounted on the lifting cylinder, and the main shaft and the lifting cylinder cooperating through a first linkage structure, such that when the lifting cylinder descends to a first height, the lifting cylinder will rotate synchronously with the main shaft. A rotatable stirring rod is provided on one side of the lifting cylinder. A stirring blade is fixed on the stirring rod. The stirring rod and the lifting cylinder are connected by a second linkage structure. When the lifting cylinder descends to the first height, the stirring rod will rotate. When the lifting cylinder rotates synchronously with the main shaft, it will drive the stirring rod to rotate synchronously and generate its own rotation to stir the asphalt liquid.
[0007] The intelligent sensing rubber composite modified pavement asphalt viscosity detection device described above: a motor is fixedly installed on the frame, and the output end of the motor is connected to the main shaft through a coupling to drive the main shaft to rotate.
[0008] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device is provided: the lifting cylinder is sleeved on the main shaft, the surface of the main shaft is provided with external threads, and the inner wall of the lifting cylinder is provided with internal threads. The main shaft and the lifting cylinder are connected by external and internal threads to form a threaded pair connection. In the initial environment, the asphalt liquid is viscous and the resistance is large, so the lifting cylinder does not rotate when the main shaft rotates. The threaded pair connection between the main shaft and the lifting cylinder is used to drive the lifting cylinder to descend.
[0009] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device includes a first sleeve fixed on a main shaft and a second sleeve fixed on a lifting cylinder. The first sleeve is sleeved on the outer periphery of the lifting cylinder and is movably inserted into the interior of the second sleeve. An annular protrusion is fixed at the bottom of the first sleeve and is movably engaged inside the interior of the second sleeve. A first wedge-shaped locking block is fixed on the upper surface of the annular protrusion. A second wedge-shaped locking block is fixed on the inner top wall of the second sleeve. When the lifting cylinder descends to a first height, the first wedge-shaped locking block contacts and locks onto one side of the second wedge-shaped locking block.
[0010] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device includes the following: The second linkage structure includes a second bevel gear rotatably mounted on a lifting cylinder. A short transmission shaft is rotatably mounted on the central axis of the second bevel gear via a bearing. A first bevel gear meshing with the second bevel gear is fixedly mounted at the end of the stirring rod via a bearing. A fixed shaft is rotatably mounted on the central axis of the stirring rod via a bearing. One end of the fixed shaft is fixed to one end of the short transmission shaft. A connecting plate is fixed to the other end of the short transmission shaft. A connecting rod is provided between the connecting plate and the main shaft. The two ends of the connecting rod are respectively hinged to the main shaft and the connecting plate. The second bevel gear and the lifting cylinder cooperate through a transmission mechanism. When the lifting cylinder descends to a first height, the lifting cylinder rotates synchronously with the main shaft, which drives the second bevel gear to rotate.
[0011] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device includes a transmission mechanism comprising a fixed cylinder fixed below the frame, a sliding inner rod that can slide up and down is installed inside the fixed cylinder via a key structure, an annular transmission cylinder sleeved on the sliding inner rod, the lifting cylinder and the annular transmission cylinder being movably engaged and the lifting cylinder being rotatable inside the annular transmission cylinder, and a bevel gear ring that meshes with a second bevel gear is fixedly installed at the bottom of the annular transmission cylinder.
[0012] The intelligent sensing rubber composite modified pavement asphalt viscosity detection device described above: the key structure includes a flat key fixed on the sliding inner rod and a keyway opened on the inner wall of the fixed cylinder, wherein the flat key is movably embedded and snapped into the keyway.
[0013] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device is provided with an annular guide key fixed on the main shaft, and an annular guide groove with an inner surface size that matches the outer surface size of the annular guide key is opened on the inner wall of the annular transmission cylinder, and the annular guide key is movably embedded and snapped into the annular guide groove.
[0014] As described above, an intelligent sensing rubber composite modified pavement asphalt viscosity testing device has a sealing rubber ring fixedly bonded to the inner wall of the upper port of the second sleeve to seal the gap between the first sleeve and the second sleeve.
[0015] The intelligent sensing rubber composite modified pavement asphalt viscosity detection device described above also includes a temperature sensor, which is fixedly installed on the lifting cylinder for real-time monitoring of the asphalt liquid temperature.
[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention integrates multiple functional steps such as the descent of the viscosity detection probe, the unfolding of the stirring rod, efficient stirring and the final viscosity measurement into the same motion system driven by the motor through the main shaft through the mechanical linkage structure design. It eliminates the independent lifting drive mechanism required in the traditional solution. The descent is achieved by the relative motion of the threaded pair between the main shaft and the lifting cylinder under the initial resistance. The first linkage structure automatically switches to synchronous rotation when the first height is reached, which greatly simplifies the overall structure of the device, reduces the cost, and fundamentally avoids the timing coordination problem between multiple drive sources, thus improving reliability. (2) During the stirring stage, the first linkage structure causes the lifting cylinder to drive the unfolded stirring rod and stirring blades to revolve with the main shaft. At the same time, the motion chain formed by the second linkage structure drives the stirring rod to rotate while revolving, forming a compound motion mode of revolution plus rotation. This motion can generate strong three-dimensional shear and turbulence in the high viscosity medium of asphalt, which is especially suitable for rubber composite modified asphalt. It can quickly and uniformly disperse the modifier, providing highly uniform sample conditions for subsequent measurements, which is the key to ensuring data accuracy. (3) The entire testing process is automatically and sequentially triggered by the mechanical structure under the continuous rotation of the main shaft. Initially, the lifting cylinder descends under the side effect of the thread, and at the same time, the stirring rod is flipped from the retracted state to the working state by the connecting rod. When the lifting cylinder descends to the first height, the first linkage structure is locked, and the device automatically enters the compound stirring mode. After the stirring is sufficient, the viscosity detection probe can perform real-time stable measurement. This process does not require manual intervention or mode switching, is highly efficient, and avoids sample separation or temperature fluctuation caused by standing after stirring, ensuring the authenticity and reliability of the measurement results. Attached Figure Description
[0017] Figure 1 This is a first-view schematic diagram of the overall structure of an intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt.
[0018] Figure 2 This is a schematic diagram of the overall structure from a second perspective of an intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt.
[0019] Figure 3 for Figure 1 A schematic diagram of the decomposed part of the structure.
[0020] Figure 4 for Figure 3 A schematic diagram of the structure after disassembly and partial cross-sectional views of the first and second sleeves.
[0021] Figure 5 for Figure 3 A schematic diagram of the decomposed part of the structure.
[0022] Figure 6 for Figure 5 A schematic diagram of the decomposed part of the structure.
[0023] Figure 7 for Figure 5 A schematic diagram of the decomposed part of the structure.
[0024] Figure 8 for Figure 7 Enlarged structural diagram at point A in the middle.
[0025] Figure 9 for Figure 5 A schematic diagram of the decomposed part of the structure.
[0026] Figure 10 for Figure 3 A schematic diagram of the decomposed part of the structure.
[0027] Figure 11 for Figure 10 Enlarged structural diagram at point B.
[0028] In the diagram: 1. Frame; 2. Lifting cylinder; 3. Viscosity detection probe; 4. Main shaft; 5. Motor; 6. Stirring rod; 7. Stirring blade; 8. External thread; 9. Internal thread; 10. First sleeve; 11. Second sleeve; 12. Annular protrusion; 13. First wedge-shaped block; 14. Second wedge-shaped block; 15. Fixed shaft; 16. Transmission short shaft; 17. First bevel gear; 18. Second bevel gear; 19. Connecting plate; 20. Connecting rod; 21. Annular transmission cylinder; 22. Annular guide key; 23. Annular guide groove; 24. Bevel gear ring; 25. Fixed cylinder; 26. Sliding inner rod; 27. Flat key; 28. Keyway. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0030] Please see Figures 1-11 As an embodiment of the present invention, an intelligent sensing rubber composite modified pavement asphalt viscosity detection device includes a frame 1, a main shaft 4 rotatably mounted on the frame 1, a liftable lifting cylinder 2 threadedly connected to the main shaft 4, a viscosity detection probe 3 for detecting asphalt viscosity mounted on the lifting cylinder 2, and the main shaft 4 and the lifting cylinder 2 cooperating through a first linkage structure, so that when the lifting cylinder 2 descends to a first height, the lifting cylinder 2 will rotate synchronously with the main shaft 4; A rotatable stirring rod 6 is provided on one side of the lifting cylinder 2. A stirring blade 7 is fixed on the stirring rod 6. The stirring rod 6 and the lifting cylinder 2 are connected by a second linkage structure. When the lifting cylinder 2 descends to the first height, the stirring rod 6 will be rotated. When the lifting cylinder 2 rotates synchronously with the main shaft 4, it will drive the stirring rod 6 to rotate synchronously and generate its own rotation to stir the asphalt liquid.
[0031] In this embodiment, during use, the asphalt liquid to be tested is placed in a storage tank, and the device is placed on one side above the storage tank. The lifting cylinder 2 extends into the asphalt liquid. When the drive device drives the main shaft 4 to rotate, since the lifting cylinder 2 is connected to the main shaft 4 through a threaded pair, and the lifting cylinder 2 is subject to the rotational resistance of the highly viscous asphalt, the lifting cylinder 2 will not immediately rotate with the main shaft 4. Instead, the two will rotate relative to each other, thereby driving the lifting cylinder 2 to descend axially along the main shaft 4, causing the viscosity detection probe 3 to continuously descend into the asphalt liquid. During the descent, through the mechanical transmission of the second linkage structure, the stirring rod 6 gradually flips and unfolds from the retracted state. When the lifting cylinder 2 drives the viscosity detection probe 3 to descend to the preset first height, the first linkage... Once the structure is activated, the lifting cylinder 2 engages with the main shaft 4 and begins to rotate synchronously with the main shaft 4. At this time, the deployed stirring rod 6 and stirring blades 7 revolve around the main shaft 4 together with the lifting cylinder 2. Simultaneously, under the action of the second linkage structure, the stirring rod 6 also rotates around its own axis while revolving, forming a compound stirring action to efficiently and thoroughly stir the asphalt liquid in the container. After the asphalt is uniformly stirred, the rotation of the main shaft 4 is maintained. At this time, the viscosity detection probe 3, which rotates synchronously with the lifting cylinder 2, can measure the viscosity of the uniformly stirred asphalt liquid to obtain accurate detection data. The process of descent-deployment-compound stirring-measurement is automatically and sequentially completed by the continuous rotation drive of a main shaft 4.
[0032] As a further embodiment of the present invention, a motor 5 is fixedly installed on the frame 1, and the output end of the motor 5 is connected to the main shaft 4 through a coupling to drive the main shaft 4 to rotate.
[0033] In this embodiment, the motor 5 is electrically connected to an external power source via a wire. As the sole power source for the entire device, the motor 5 transmits torque directly to the main shaft 4 via a coupling after startup, driving it to rotate and thus providing power input for the entire testing process.
[0034] As a further embodiment of the present invention, the lifting cylinder 2 is sleeved on the main shaft 4. The surface of the main shaft 4 is provided with an external thread 8, and the inner wall of the lifting cylinder 2 is provided with an internal thread 9. The main shaft 4 and the lifting cylinder 2 are connected by the external thread 8 and the internal thread 9 to form a threaded pair connection. In the initial environment, the asphalt liquid is viscous and has high resistance, so the lifting cylinder 2 does not rotate when the main shaft 4 rotates. The threaded pair connection between the main shaft 4 and the lifting cylinder 2 is used to drive the lifting cylinder 2 to descend.
[0035] In this embodiment, the external thread 8 and the internal thread 9 form a threaded pair. In the initial stage, the rotational resistance torque experienced by the viscosity detection probe 3 when immersed in the high-viscosity asphalt is greater than the driving torque of the threaded pair, causing the lifting cylinder 2 to be unable to rotate with the main shaft 4. At this time, the two rotate relative to each other. According to the principle of thread transmission, the rotational motion of the main shaft 4 is converted into the axial linear downward motion of the lifting cylinder 2 relative to the main shaft 4, thereby realizing the function of automatically and smoothly immersing the viscosity detection probe 3 in the asphalt liquid.
[0036] As a further embodiment of the present invention, the first linkage structure includes a first sleeve 10 fixed on the main shaft 4 and a second sleeve 11 fixed on the lifting cylinder 2. The first sleeve 10 is sleeved on the outer periphery of the lifting cylinder 2 and is movably inserted into the interior of the second sleeve 11. An annular protrusion 12 is fixed at the bottom of the first sleeve 10 and is movably engaged inside the interior of the second sleeve 11. A first wedge-shaped locking block 13 is fixed on the upper surface of the annular protrusion 12. A second wedge-shaped locking block 14 is fixed on the inner top wall of the second sleeve 11. When the lifting cylinder 2 descends to the first height, the first wedge-shaped locking block 13 just contacts and locks one side of the second wedge-shaped locking block 14.
[0037] In this embodiment, during the initial stage of the descent of the lifting cylinder 2, there is relative axial movement between the second sleeve 11 and the first sleeve 10. When the lifting cylinder 2 descends to a preset first height, the second wedge-shaped locking block 14 fixed on the second sleeve 11 contacts the inclined surface of the first wedge-shaped locking block 13 fixed on the annular protrusion 12. With the slight relative displacement generated by the continued rotation of the main shaft 4, the wedge surfaces of the first wedge-shaped locking block 13 and the second wedge-shaped locking block 14 press against each other and finally engage, forming a circumferential lock. This engaging action transmits the rotational torque of the main shaft 4 to the lifting cylinder 2 through the first sleeve 10, the first wedge-shaped locking block 13, the second wedge-shaped locking block 14, and the second sleeve 11, so that the lifting cylinder 2 switches from the descent mode to the synchronous rotation mode with the main shaft 4, providing a power basis for subsequent compound stirring and measurement.
[0038] As a further embodiment of the present invention, the second linkage structure includes a second bevel gear 18 rotatably mounted on the lifting cylinder 2. A short transmission shaft 16 is rotatably mounted on the central axis of the second bevel gear 18 via a bearing. A first bevel gear 17 meshing with the second bevel gear 18 is fixedly mounted at the end of the stirring rod 6 via a bearing. A fixed shaft 15 is rotatably mounted on the central axis of the stirring rod 6 via a bearing. One end of the fixed shaft 15 is fixed to one end of the short transmission shaft 16. A connecting plate 19 is fixed to the other end of the short transmission shaft 16. A connecting rod 20 is provided between the connecting plate 19 and the main shaft 4. The two ends of the connecting rod 20 are respectively hinged to the main shaft 4 and the connecting plate 19. The second bevel gear 18 and the lifting cylinder 2 cooperate through a transmission mechanism. When the lifting cylinder 2 descends to the first height, the lifting cylinder 2 rotates synchronously with the main shaft 4, which drives the second bevel gear 18 to rotate.
[0039] In this embodiment, during the descent of the lifting cylinder 2 along the main shaft 4, the connecting rod 20 is hinged to the main shaft 4 and the connecting plate 19 at both ends, and the connecting plate 19 is fixed to the transmission short shaft 16, which is in turn fixed to the fixed shaft 15. The fixed shaft 15 connects to the stirring rod 6. When the lifting cylinder 2 descends, the length and angle constraints of the connecting rod 20 force the connecting plate 19 to rotate around the center line of the transmission short shaft 16, causing the fixed shaft 15 to flip. This causes the stirring rod 6 to unfold from the retracted state. The first bevel gear 17 also rotates but is always meshed with the second bevel gear 18. When the lifting cylinder 2 descends to the position and begins to rotate synchronously with the main shaft 4, the transmission mechanism drives the second bevel gear 18 to rotate. The second bevel gear 18 transmits the rotational motion to the stirring rod 6 through meshing with the first bevel gear 17, causing it to rotate around its own axis while revolving with the lifting cylinder 2, thus achieving efficient compound stirring motion.
[0040] It should be noted that the flipping angle of the stirring rod 6 can be determined according to the initial length and angle of the connecting rod 20. Therefore, the flipping angle of the stirring rod 6 can be designed and adjusted to adapt to the mixing of asphalt liquid storage tanks of different diameters. At the same time, the flipping of the stirring rod 6 allows it to be folded and stored when not in use, making the overall structure more portable.
[0041] As a further embodiment of the present invention, the transmission mechanism includes a fixed cylinder 25 fixed below the frame 1. A sliding inner rod 26 that can slide up and down is installed inside the fixed cylinder 25 through a key structure. An annular transmission cylinder 21 that is sleeved on the sliding inner rod 26 is fixed. The lifting cylinder 2 and the annular transmission cylinder 21 are movably engaged and the lifting cylinder 2 can rotate inside the annular transmission cylinder 21. A bevel gear ring 24 that meshes with the second bevel gear 18 is fixedly installed at the bottom of the annular transmission cylinder 21.
[0042] In this embodiment, the fixed cylinder 25 is connected to the sliding inner rod 26 via a key structure, so that the sliding inner rod 26 and the annular transmission cylinder 21 fixed thereto can only slide up and down along the fixed cylinder 25, but cannot rotate around its axis. When the lifting cylinder 2 descends or rises, it can drive the annular transmission cylinder 21 to move up and down accordingly to maintain the meshing relationship with the second bevel gear 18. When the device enters the stirring and measuring mode, that is, when the lifting cylinder 2 drives the second bevel gear 18 to rotate synchronously, the annular transmission cylinder 21 and the bevel gear ring 24 cannot rotate because they are restricted by the fixed cylinder 25 and the key structure, which is equivalent to a fixed "gear ring". Therefore, the rotating second bevel gear 18 will perform planetary motion around the stationary bevel gear ring 24, thereby being driven to generate its own rotation around its axis, realizing the rotation of the stirring rod 6.
[0043] As a further embodiment of the present invention, the key structure includes a flat key 27 fixed on the sliding inner rod 26 and a keyway 28 formed on the inner wall of the fixed cylinder 25, wherein the flat key 27 is movably embedded and snapped into the keyway 28.
[0044] In this embodiment, the sliding fit between the flat key 27 and the keyway 28 ensures that the sliding inner rod 26 and the annular transmission cylinder 21 can slide freely up and down along the axial direction of the fixed cylinder 25 to adapt to the lifting stroke of the lifting cylinder 2, while strictly limiting their relative circumferential rotation, ensuring that the circumferential position of the annular transmission cylinder 21 is fixed, thus providing a structural basis for the bevel gear ring 24 as a fixed "gear ring" and ensuring the stability of the planetary gear transmission.
[0045] As a further embodiment of the present invention, an annular guide key 22 is fixed on the main shaft 4, and an annular guide groove 23 with an inner surface size that matches the outer surface size of the annular guide key 22 is opened on the inner wall of the annular transmission cylinder 21. The annular guide key 22 is movably embedded and snapped into the annular guide groove 23.
[0046] In this embodiment, the sliding engagement of the annular guide key 22 and the annular guide groove 23 prevents the annular transmission cylinder 21 from moving up and down relative to the main shaft 4, but the two are locked in the axial direction. When the main shaft 4 moves up and down, the annular transmission cylinder 21 can be driven to move up and down synchronously through the annular guide key 22. At the same time, when the main shaft 4 rotates, the annular guide key 22 and the annular transmission cylinder 21 slide and engage, so that the annular transmission cylinder 21 does not rotate synchronously with the main shaft 4.
[0047] As a further aspect of the present invention, a sealing rubber ring is fixedly adhered to the inner wall of the upper end of the second sleeve 11 to seal the gap between the first sleeve 10 and the second sleeve 11.
[0048] In this embodiment, the sealing rubber ring can effectively fill the sliding gap between the first sleeve 10 and the second sleeve 11. During the operation of the device, especially when stirring high-viscosity asphalt, it can effectively prevent asphalt splashes or vapors from entering the interior of the first linkage structure, and avoid asphalt contaminants from getting stuck in the movement of the first wedge-shaped block 13 and the second wedge-shaped block 14 or contaminating the interior, thereby ensuring that the first linkage structure works reliably for a long time and extending the service life of the device.
[0049] As a further aspect of the present invention, a temperature sensor is also included, which is fixedly installed on the lifting cylinder 2 for real-time monitoring of the temperature of the asphalt liquid.
[0050] In this embodiment, the temperature sensor fixed on the lifting cylinder 2 has its sensing end immersed in the asphalt liquid along with the viscosity detection probe 3. It can intelligently sense and measure the actual temperature of the asphalt sample during the stirring and testing process. In conjunction with the viscosity detection probe 3, it can obtain viscosity measurement data of the asphalt viscosity at an accurate constant temperature. This design ensures that the viscosity detection is carried out under known and controllable temperature conditions, providing key temperature parameters for obtaining accurate and repeatable viscosity data. It is an important component for realizing "intelligent sensing" and accurate measurement.
[0051] The working principle of this invention is as follows: After startup, the motor 5 drives the main shaft 4 to rotate at a constant speed. Initially, the viscosity detection probe 3 and the lifting cylinder 2 are resisted by the high viscosity asphalt and cannot rotate with the main shaft 4. They generate relative movement through the threaded pair of the external thread 8 and internal thread 9, driving the lifting cylinder 2 to lower the viscosity detection probe 3 and the stirring rod 6. During the descent, the connecting rod 20 pulls the stirring rod 6, causing it to gradually rotate outward from its vertically retracted state. When the lifting cylinder 2 descends to a preset first height, the second wedge-shaped locking block 14 on the second sleeve 11 contacts and engages with the first wedge-shaped locking block 13 on the first sleeve 10, locking the lifting cylinder 2 circumferentially with the main shaft 4 and starting to rotate synchronously. At the same time, the unfolded stirring rod 6 and stirring blades 7 revolve with the lifting cylinder 2. Simultaneously, the lifting cylinder 2 drives the second bevel gear 18 to revolve, while the bevel gear ring 24 meshing with it is stationary due to the restriction of the annular transmission cylinder 21 by the fixed cylinder 25. This forces the second bevel gear 18 to rotate, and through the first bevel gear 17, drives the stirring rod 6 to rotate, forming a compound stirring of "revolution + rotation". This quickly and evenly stirs the asphalt. After stirring is completed, the main shaft 4 is kept rotating, and the synchronously rotating viscosity detection probe 3 can accurately measure the viscosity of the asphalt sample in a constant temperature and uniform environment. The entire process is completed automatically, continuously, and sequentially by a single rotating power source. The structure is compact, the detection efficiency is high, and the results are accurate and reliable.
[0052] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.
Claims
1. A smart sensing device for detecting the viscosity of rubber-modified pavement asphalt, comprising a frame (1), characterized in that, A main shaft (4) is rotatably mounted on the frame (1). A lifting cylinder (2) is threadedly connected to the main shaft (4). A viscosity detection probe (3) for detecting the viscosity of asphalt is installed on the lifting cylinder (2). The main shaft (4) and the lifting cylinder (2) are connected by a first linkage structure. When the lifting cylinder (2) descends to the first height, the lifting cylinder (2) will rotate synchronously with the main shaft (4). A rotatable stirring rod (6) is provided on one side of the lifting cylinder (2). A stirring blade (7) is fixed on the stirring rod (6). The stirring rod (6) and the lifting cylinder (2) are connected by a second linkage structure. When the lifting cylinder (2) descends to the first height, the stirring rod (6) will be rotated. When the lifting cylinder (2) rotates synchronously with the main shaft (4), it will drive the stirring rod (6) to rotate synchronously and generate its own rotation to stir the asphalt liquid.
2. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 1, characterized in that, A motor (5) is fixedly installed on the frame (1). The output end of the motor (5) is connected to the main shaft (4) through a coupling to drive the main shaft (4) to rotate.
3. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 1, characterized in that, The lifting cylinder (2) is sleeved on the main shaft (4). The surface of the main shaft (4) is provided with an external thread (8), and the inner wall of the lifting cylinder (2) is provided with an internal thread (9). The main shaft (4) and the lifting cylinder (2) are connected by the external thread (8) and the internal thread (9) to form a threaded pair connection. In the initial environment, the asphalt liquid is viscous and has high resistance, so the lifting cylinder (2) does not rotate when the main shaft (4) rotates. The threaded pair connection between the main shaft (4) and the lifting cylinder (2) is used to drive the lifting cylinder (2) to descend.
4. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 1, characterized in that, The first linkage structure includes a first sleeve (10) fixed on the main shaft (4) and a second sleeve (11) fixed on the lifting cylinder (2). The first sleeve (10) is sleeved on the outer periphery of the lifting cylinder (2). The first sleeve (10) is movably inserted into the inside of the second sleeve (11). The bottom of the first sleeve (10) is fixed with an annular protrusion (12) that is movably locked inside the second sleeve (11). A first wedge-shaped locking block (13) is fixed on the upper surface of the annular protrusion (12). A second wedge-shaped locking block (14) is fixed on the inner top wall of the second sleeve (11). When the lifting cylinder (2) descends to the first height, the first wedge-shaped locking block (13) just contacts and locks one side of the second wedge-shaped locking block (14).
5. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 1, characterized in that, The second linkage structure includes a second bevel gear (18) rotatably mounted on the lifting cylinder (2). A short transmission shaft (16) is rotatably mounted on the central axis of the second bevel gear (18) via a bearing. A first bevel gear (17) meshing with the second bevel gear (18) is fixedly mounted at the end of the stirring rod (6). A fixed shaft (15) is rotatably mounted on the central axis of the stirring rod (6) via a bearing. The end of the fixed shaft (15) is fixed to one end of the short transmission shaft (16). A connecting plate (19) is fixed to the other end of the short transmission shaft (16). A connecting rod (20) is provided between the connecting plate (19) and the main shaft (4). The two ends of the connecting rod (20) are hinged to the main shaft (4) and the connecting plate (19) respectively. The second bevel gear (18) and the lifting cylinder (2) cooperate through a transmission mechanism. When the lifting cylinder (2) descends to the first height, the lifting cylinder (2) rotates synchronously with the main shaft (4), which drives the second bevel gear (18) to rotate.
6. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 5, characterized in that, The transmission mechanism includes a fixed cylinder (25) fixed below the frame (1). A sliding inner rod (26) that can slide up and down is installed inside the fixed cylinder (25) through a key structure. An annular transmission cylinder (21) sleeved on the sliding inner rod (26) is fixed. The lifting cylinder (2) and the annular transmission cylinder (21) are movably engaged and the lifting cylinder (21) can rotate inside the annular transmission cylinder (21). A bevel gear ring (24) that meshes with the second bevel gear (18) is fixedly installed at the bottom of the annular transmission cylinder (21).
7. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 6, characterized in that, The key structure includes a flat key (27) fixed on the sliding inner rod (26) and a keyway (28) opened on the inner wall of the fixed cylinder (25). The flat key (27) is movably embedded and snapped into the keyway (28).
8. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 6, characterized in that, The main shaft (4) is fixed with an annular guide key (22), and the inner wall of the annular transmission cylinder (21) is provided with an annular guide groove (23) whose inner surface size matches the outer surface size of the annular guide key (22). The annular guide key (22) is movably embedded and snapped into the annular guide groove (23).
9. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 4, characterized in that, A sealing rubber ring is fixedly adhered to the inner wall of the upper port of the second sleeve (11) to seal the gap between the first sleeve (10) and the second sleeve (11).
10. The intelligent sensing device for detecting the viscosity of rubber-modified pavement asphalt according to claim 1, characterized in that, It also includes a temperature sensor, which is fixedly installed on the lifting cylinder (2) for real-time monitoring of the temperature of the asphalt liquid.