Intelligent judgment system and method for optimal mixing amount of asphalt regenerant

Abstract

The invention discloses an intelligent judgment system and method for the optimal mixing amount of an asphalt regenerant, and the judgment system comprises a Brookfield viscosity testing device, a regenerant storage tank, a metering pump, an electromagnetic valve and a front-end pipeline, the Brookfield viscosity testing device is provided with a sample containing barrel and a rotor and is used for acquiring multiple groups of asphalt viscosity data obtained by adding a regenerant into the sample containing barrel for multiple times; the regenerant storage tank is connected with a conveying pipeline; the metering pump and the electromagnetic valve are arranged on the conveying pipeline; the front-end pipeline is connected with the conveying pipeline, the front-end pipeline extends to the inner wall of the sample containing barrel, a plurality of liquid outlet holes which are formed at intervals in the extending direction of the front-end pipeline are formed in the side wall of the front-end pipeline, and a regenerant can enter the sample containing barrel through the liquid outlet holes to be mixed with asphalt. According to the method, manual measuring cup operation is replaced by automatic adding of the regenerant, the preparation period of the mixing amount test is shortened, the dosage error of manual adding is avoided, and the test reproducibility and the result reliability are improved.

Description

Technical Field

[0001] This invention belongs to the field of asphalt testing technology, and specifically relates to an intelligent system and method for determining the optimal dosage of asphalt recycling agents. Background Technology

[0002] In asphalt pavement recycling projects, the old asphalt in recycled asphalt pavement materials (RAP) often undergoes changes in composition due to long-term oxidative aging, resulting in a significant increase in viscosity, a decrease in ductility, and a substantial decline in road performance. To restore the performance of aged asphalt, asphalt recycling agents are usually added. The dosage is a key parameter in the design of recycled mixtures, directly affecting viscosity recovery and fatigue crack resistance. Therefore, the optimal dosage that meets the target viscosity (usually with the viscosity of the original asphalt as a reference) needs to be determined through Brookfield viscosity tests.

[0003] Existing methods for determining regenerant dosage require preparing multiple sets of samples with different dosages, heating and testing them separately, and obtaining multiple sets of data to roughly determine the optimal dosage. However, the above-mentioned methods in the existing technology have the following problems:

[0004] 1. The entire process relies on manual operation, which involves high-temperature contact and poses certain safety risks; in addition, frequent sample changes and cleaning make it difficult to achieve continuous titration measurement of a single sample, resulting in low efficiency.

[0005] 2. Manual weighing and pouring of the regenerant can easily lead to dosage deviations, resulting in insufficient reproducibility;

[0006] 3. The determination of the optimal dosage relies heavily on human experience. The test data is discontinuous, making it difficult to capture the moment when the asphalt reaches the target viscosity after adding the recycling agent, which makes it difficult to guarantee the accuracy of the obtained optimal dosage. Summary of the Invention

[0007] Based on the above analysis, the embodiments of the present invention aim to provide an intelligent system and method for determining the optimal dosage of asphalt recycling agent, so as to solve one or more of the above-mentioned problems existing in the prior art.

[0008] The objective of this invention is achieved as follows:

[0009] On the one hand, an intelligent system for determining the optimal dosage of asphalt recycling agent is provided, including:

[0010] The Brinell viscosity tester has a sample container and a rotor, and is used to acquire multiple sets of asphalt viscosity data after multiple additions of rejuvenator into the sample container.

[0011] A regenerant storage tank, which stores regenerant, is connected to a delivery pipeline;

[0012] A metering pump is installed on the delivery pipeline. The metering pump draws a predetermined amount of regenerant from the regenerant storage tank and delivers it through the delivery pipeline.

[0013] Solenoid valves are installed on the delivery pipeline to control the opening and closing of the delivery pipeline;

[0014] The front-end pipeline is connected to the delivery pipeline and extends to the inner wall of the sample container. The side wall of the front-end pipeline is provided with multiple liquid outlet holes arranged at intervals along the extension direction of the front-end pipeline. The regenerant can enter the sample container through the liquid outlet holes and mix with the asphalt.

[0015] Furthermore, the inner wall of the sample container is provided with a rectangular groove, the front end pipe is a rectangular pipe, the front end pipe is snapped into the groove, and the liquid outlet is opened on the outer wall surface of the front end pipe facing the central axis of the sample container.

[0016] Furthermore, the outer wall surface of the front-end pipeline facing the central axis of the sample container is coplanar with the inner wall surface of the sample container.

[0017] Furthermore, the front-end piping is made of a flexible and high-temperature resistant material.

[0018] Furthermore, the front-end piping is made of polytetrafluoroethylene (PTFE).

[0019] Furthermore, the main body of the sample container is a cylindrical structure, the bottom of the sample container is a conical structure, the front end pipe has two branch pipes, and grooves are provided on both sides of the sample container. The two branch pipes are respectively set in the grooves through interference expansion joints. The grooves extend downward along the side wall of the sample container and finally extend to the middle position of the conical surface at the bottom of the sample container.

[0020] Furthermore, a rubber block is used to seal the liquid outlet, and the rubber block has a cross-shaped groove, which is closed when no pressure is applied.

[0021] Furthermore, the judgment system also includes a pressing mechanism that can extend into the sample container to flatten the front-end pipe installed in the groove.

[0022] Furthermore, the Brinell viscosity testing device also includes a viscometer stage, which is movably connected to the main shaft. The viscometer stage has a downwardly extending rotating shaft, and a sample container is placed directly below the viscometer stage. The rotor and the rotating shaft are detachably connected by fasteners.

[0023] Furthermore, the Brinell viscosity testing apparatus also includes a lifting mechanism, a disassembly manipulator, and a transfer mechanism; the lifting mechanism is located on one side of the rotor and can abut against and clamp the rotor; the disassembly manipulator is located on the other side of the rotor and can remove the fasteners, thereby separating the rotor from the rotating shaft; the transfer mechanism is located on one side of the rotor and is used to transport the disassembled rotor out and transport the new rotor to the underside of the rotating shaft; the lifting mechanism is used to dock the new rotor with the rotating shaft; and the disassembly manipulator connects the fasteners to the rotating shaft and the new rotor.

[0024] On the other hand, an intelligent method for determining the optimal dosage of asphalt rejuvenator is also provided, which adopts the above-mentioned intelligent system for determining the optimal dosage of asphalt rejuvenator; based on multiple sets of asphalt viscosity data obtained by the Brookfield viscosity tester, the determination result of the optimal dosage of asphalt rejuvenator is obtained.

[0025] Compared with existing technologies, the intelligent determination system and method for optimal dosage of asphalt recycling agent provided by this invention can achieve at least one of the following beneficial effects:

[0026] 1. By configuring a metering pump and a solenoid valve on the delivery pipeline, the system can automatically extract the corresponding volume of regenerant and inject it into the sample container according to the preset regenerant dosage parameters, thereby replacing the traditional manual measuring cup addition method. This not only realizes continuous titration measurement of a single sample, but also achieves precise control of the addition amount through the metering pump, effectively avoiding dosage errors that may be caused by manual operation, and has good experimental test reproducibility.

[0027] 2. After one measurement is completed, the next addition of regenerant can be performed automatically, which not only solves the problem of tedious and time-consuming manual addition process, but also significantly shortens the preparation time for dosage testing, reduces labor intensity, and improves overall testing efficiency.

[0028] 3. It can obtain more continuous test data results and can more accurately capture the moment when the asphalt reaches the target viscosity after adding the recycling agent, thereby obtaining more accurate optimal dosage results.

[0029] 4. A front-end pipe connected to the far end of the delivery pipeline extends into the inner wall of the sample container, and its side wall has multiple outlet holes spaced axially. The rejuvenator drawn by the metering pump flows to the front-end pipe through the delivery pipeline, and is finally injected into the asphalt at different heights in the sample container through these outlet holes. The rejuvenator in this application adopts a porous dispersion injection method into the asphalt, which can effectively improve the uniformity of the distribution of the rejuvenator in the asphalt. Compared with the traditional method of directly dripping the rejuvenator onto the top surface of the asphalt, this application can effectively reduce the deviation of the test results caused by local uneven concentration due to manual addition, thereby significantly improving the accuracy of the optimal dosage test results.

[0030] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the details specifically pointed out in the description and drawings. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings.

[0032] Figure 1 A schematic diagram of the intelligent system for determining the optimal dosage of asphalt rejuvenator provided by the present invention;

[0033] Figure 2 for Figure 1 A schematic diagram of the structure of the sample container with the pressing mechanism installed after being cut open;

[0034] Figure 3 This is a schematic diagram of the structure of the Brinell viscosity measuring device provided by the present invention;

[0035] Figure 4 for Figure 3 A magnified schematic diagram of a portion of region A in the middle;

[0036] Figure 5 A schematic diagram of the overall structure of the lifting mechanism and the transmission mechanism provided by the present invention;

[0037] Figure 6 for Figure 5 A magnified schematic diagram of a portion of region B in the middle;

[0038] Figure 7 This is a cross-sectional structural diagram of the cleaning chamber provided by the present invention.

[0039] Figure label:

[0040] 10. Viscometer testing platform; 11. Rotating shaft; 12. Rotor;

[0041] 20. Disassemble the robotic arm; 21. Disassemble the outer casing; 22. Disassemble the guide rails; 23. Disassemble the telescopic motor; 24. Disassemble the rotary motor; 25. Disassemble the blade;

[0042] 30. Lifting mechanism; 31. Drive rail; 32. Conveyor belt assembly; 33. Moving seat; 34. Clamping motor; 35. Extension piece; 36. Clamping frame;

[0043] 40. Transmission mechanism; 41. Conveyor belt structure; 42. Curved conveyor belt structure; 43. Conveyor chain structure;

[0044] 50. Storage compartment; 51. Sealing door; 52. First drive motor; 53. Second drive motor;

[0045] 60. Upper shell; 61. Lower shell; 70. Three-axis slide rail module; 71. Sample container; 72. Main spindle;

[0046] 80. Regenerant storage tank; 81. Delivery pipeline; 82. Metering pump; 83. Solenoid valve; 84. Front-end pipeline; 85. Liquid outlet; 86. Groove; 87. Branch pipe;

[0047] 90. Main rod; 91. Base; 92. Press handle; 93. Movable sleeve; 94. Support arm; 95. Press wheel; 96. High-temperature resistant rope; 97. Directional pulley. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0049] To facilitate understanding of the embodiments of this application, further explanation and description will be provided below with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application. In the drawings, the dimensions and relative dimensions of components may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, a specific process sequence may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of their description. Furthermore, the same reference numerals denote the same components.

[0050] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms “a” and “the” are intended to include the plural forms as well. Furthermore, when the terms “comprising” and / or “including” and variations thereof are used in this specification, it indicates the presence of the stated features, integrals, steps, operations, parts, components, and / or groups thereof, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, parts, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than as terms of degree, thus explaining the inherent biases in measurements, calculated values, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0051] Example 1

[0052] A specific embodiment of the present invention, such as Figure 1 and Figure 2 As shown, an intelligent system for determining the optimal dosage of asphalt recycling agent is disclosed, including a Brinell viscosity tester, a metering pump 82, a solenoid valve 83, a front-end pipeline 84, and a recycling agent storage tank 80. The Brinell viscosity tester has a sample container and a rotor, used to acquire multiple sets of asphalt viscosity data after repeated additions of recycling agent to the sample container. The recycling agent storage tank 80 stores recycling agent, and a delivery pipeline 81 is connected to the recycling agent storage tank 80. The metering pump 82 is installed on the delivery pipeline 81, and draws a predetermined amount of recycling agent from the recycling agent storage tank 80 and delivers it through the delivery pipeline 81. The solenoid valve 83 is installed on the delivery pipeline 81 and is used to control the opening and closing of the delivery pipeline 81. The front-end pipeline 84 is connected to the delivery pipeline 81 and extends to the inner wall of the sample container 81. Multiple outlet holes 85 are spaced apart along the extension direction of the front-end pipeline 84 on its side wall, allowing the recycling agent to enter the sample container 71 through the outlet holes 85 and mix with the asphalt.

[0053] In this embodiment, the recycling agent storage tank 80 is used to store the recycling agent, and the delivery pipeline 81 is connected to the recycling agent storage tank 80. The metering pump 82 is installed on the delivery pipeline 81 and can extract the corresponding volume of recycling agent according to the preset dosage parameters, replacing the manual addition with a measuring cup. The solenoid valve 83 is connected in series on the delivery pipeline 81 and works with the metering pump 82 to control the opening and closing of the pipeline, so as to realize the timed delivery of the recycling agent. The front end pipeline 84 is connected to the far end of the delivery pipeline 81 and extends to the inner wall of the sample container 71. The side wall of the front end pipeline 84 is provided with multiple liquid outlet holes 85 at intervals along the extension direction. The recycling agent extracted by the metering pump 82 is injected evenly into the asphalt in the sample container 71 through the delivery pipeline 81 and the front end pipeline 84, and through the multiple liquid outlet holes 85, so as to complete the mixing of the recycling agent and the asphalt. The above structure solves the problem of tedious and time-consuming manual addition of recycling agent by automatically adding the recycling agent instead of manually using a measuring cup, and shortens the preparation cycle for the dosage test. The metering pump 82 can control the amount of recycling agent added, avoiding dosage errors caused by manual addition. Combined with multiple liquid outlets 85, it improves the uniformity of mixing of recycling agent and asphalt, reduces the influence of human subjectivity on the dosage determination, and improves the reproducibility and reliability of the test results.

[0054] In this embodiment, a preset amount of aged asphalt to be tested (which can be referred to as the asphalt to be tested) is injected into the sample container 71. The sample container 71 also needs to be preheated and maintained at a preset constant temperature. The preset position of the sample container 71 is located directly below the viscometer testing platform 10, which can drive the rotor 12 down into the sample container 71. Both the metering pump 82 and the solenoid valve 83 adopt existing structures. The solenoid valve 83 is a two-position, two-way direct-acting solenoid valve, including a valve body, valve core, solenoid coil, and return spring. After receiving a system control signal, the solenoid coil is energized to drive the valve core to open, opening the regenerant delivery channel; after the regenerant delivery is completed, the coil is de-energized, and the return spring drives the valve core to close, cutting off the pipeline. The metering pump 82 is a volumetric precision metering pump, including a drive motor, pump head, flow regulation module, sealing components, and a control interface. The drive motor is a stepper motor or servo motor. The pump head has a built-in cavity and a check valve. The flow regulation module can set the discharge rate via electronic signals. The control interface is linked with the system controller to achieve parameter preset and automatic start / stop. The flow regulation module matches the regenerant dosage parameters to achieve precise control of the extraction volume and delivery rate; at the same time, it receives signals through the control interface and works in conjunction with the solenoid valve 83 to complete the start-stop linkage.

[0055] In some alternative embodiments, the inner wall of the sample container 71 is provided with a rectangular groove 86, the front end pipe 84 is a rectangular pipe, the front end pipe 84 is snapped into the groove 86, and the liquid outlet 85 is opened on the pipe wall of the front end pipe 84 facing the central axis of the sample container 71.

[0056] The inner wall of the sample container 71 has a pre-set rectangular groove 86. The front-end pipe 84 is a rectangular pipe adapted to the groove 86. During installation, the front-end pipe 84 is snapped into the rectangular groove 86 to fix it in place. By opening the liquid outlet 85 on the side of the front-end pipe 84 facing the central axis of the sample container 71, the recycling agent is sprayed directly towards the central area of ​​the asphalt inside the sample container 71 after passing through the liquid outlet 85.

[0057] The outer wall surface of the front-end pipe 84 facing the central axis of the sample container 71 is coplanar with the inner wall surface of the sample container 71.

[0058] After the front-end pipe 84 is engaged with the groove 86 on the inner wall of the sample container 71, the outer wall surface of the front-end pipe 84 facing the central axis of the sample container 71 is a concave arc-shaped surface. This concave arc-shaped surface is coplanar with the arc-shaped inner wall surface of the sample container 71. In other words, the pipe wall surface of the front-end pipe 84 facing the central axis of the sample container 71 is coplanar with the inner wall surface of the sample container 71, making the inner wall of the sample container 71 a flat surface without protrusions or depressions. This allows the rotor 12 to rotate smoothly without interference with the pipe when it is immersed in the asphalt for subsequent viscosity testing. This avoids abnormal rotational resistance of the rotor 12 in the asphalt caused by protrusions in the front-end pipe 84. Furthermore, the flat inner wall of the sample container 71 facilitates subsequent cleaning, reduces asphalt residue accumulation, and ensures uniform immersion depth of the rotor 12, improving the repeatability of tests between different batches. In particular, the front-end pipe 84 engages with the groove 86, preventing asphalt from entering the groove 86. During cleaning, only one side of the outer wall of the front-end pipe 84 needs to be cleaned.

[0059] The front-end conduit 84 is made of a flexible and high-temperature resistant material. Its elasticity allows it to fit snugly into the rectangular groove 86, accommodating minor dimensional deviations. Its high-temperature resistance allows it to withstand the preheating temperatures during the mixing process of asphalt and recycling agents. The front-end conduit 84 is made of polytetrafluoroethylene (PTFE).

[0060] In some alternative embodiments, the main body of the sample container 71 is a cylindrical structure, the bottom of the sample container 71 is a conical structure, the front end pipe 84 has two branch pipes 87, and grooves 86 are provided on both opposite sides of the sample container 71. The two branch pipes 87 are respectively set in the grooves 86 through interference expansion joints. The grooves 86 extend downward along the side wall of the sample container 71 and finally extend to the middle position of the bottom conical surface of the sample container 71.

[0061] The arrangement of the bifurcated pipe 87 and the two side grooves 86 allows the recycling agent to be added simultaneously from opposite sides of the sample container 71. Combined with the liquid outlet 85 extending along the height direction, this achieves uniform distribution of the recycling agent in the asphalt in all directions. The interference fit further enhances the sealing and fixing effect of the pipeline installation.

[0062] In one alternative embodiment, a rubber block is used to seal the liquid outlet 85. The rubber block has a cross-shaped groove, which is closed when no pressure is applied.

[0063] By sealing a rubber block inside the outlet hole 85, and creating a cross-shaped groove in the rubber block, the groove closes naturally when no regenerant is being supplied, preventing asphalt from entering the pipeline. When the metering pump 82 supplies regenerant, the pressure generated by the regenerant acts on the rubber block (this pressure will not cause the rubber block to detach from the outlet hole), opening the cross-shaped groove. The regenerant is then injected into the sample container 71 through the groove. After the regenerant supply stops, the pressure disappears, and the cross-shaped groove automatically closes. The self-sealing structure of the cross-shaped groove effectively prevents asphalt backflow into the front-end pipeline 84, avoiding pipeline blockage and contamination. Optionally, the groove shape on the rubber block can also be set to a straight line or other shapes. The rubber block can be made of a high-temperature resistant mixed rubber material or other materials with similar properties.

[0064] In some alternative embodiments, the intelligent determination system for optimal dosage of asphalt recycling agent is also equipped with a pressing mechanism that can extend into the sample container 71 to flatten the front-end pipe 84 installed in the groove 86.

[0065] Specifically, the pressing mechanism includes a main rod 90, a base 91, a pressing handle 92, a movable sleeve 93, a support arm 94, a pressing wheel 95, a high-temperature resistant rope 96, and a reversing pulley component 97.

[0066] In this embodiment, the sample container 71 has two structures:

[0067] The first type of sample container 71 is a cylindrical structure with a flat bottom and regular circular sidewalls.

[0068] The second type of sample container 71 can be understood as consisting of two parts. The upper part is a cylindrical structure with open ends, and the bottom part is a conical structure. In other words, the inner wall of the sample container 71 is composed of a regular upper circumferential surface and a lower conical surface, and the bottom surface of the sample container 71 is a conical surface.

[0069] For example, this embodiment is designed for a sample container 71 with a second structure, and the inner wall of the sample container 71 has two opposing grooves 86. A main rod 90 can be inserted into the center of the bottom of the sample container 71, and a base 91 is installed at the bottom of the main rod 90, such that the base 91 abuts against the bottom of the sample container 71. Two support arms 94 are included, hinged to a position in the lower middle part of the main rod 90. The two support arms 94 are respectively oriented towards the two grooves 86 and inclined downwards. When the support arms 94 rotate upwards, the angle between the support arms 94 and the main rod 90 increases. When a predetermined angle is reached, the support arms 94 abut against the front end pipe 84 within the groove 86. A pressing wheel 95 is rotatably connected to the end of the support arm 94 near the front end pipe 84, and the pressing wheel 95 is rotatable. The movable sleeve 93 is fitted onto the top of the main rod 90. The pressing handle 92 is connected to the upper end of the main rod 90 and located below the movable sleeve 93. The reversing pulley component 97 includes a reversing rod and a pulley. The pulley is rotatably connected to one end of the reversing rod. The reversing pulley component 97 includes two pulleys. One end of the high-temperature resistant rope 96 is connected to the end of the support arm 94 near the pressing wheel 95, and the other end is reversibly connected to the bottom of the movable sleeve 93 via the reversing pulley component 97. The pulley is flush with the bottom of the movable sleeve 93 in its initial state. In use, the user's middle and index fingers rest on the bottom of the pressing handle 92, and the thumb rests on the top of the movable sleeve 93. Pressing the movable sleeve 93 causes it to move downward, and the high-temperature resistant rope 96 pulls the support arm 94 upward, causing the pressing wheel 95 to abut against the groove 86 and the front end pipe 84. Move the main rod 90 upward so that the pressing roller 95 presses the front pipe 84 along a vertical upward path, making the front pipe 84 flat with the inner wall of the sample container 71.

[0070] In this embodiment, when the base 91 abuts against the bottom of the sample container 71, the pressing roller 95 can abut against the end of the groove 86 at the bottom of the sample container 71. The axial length of the pressing roller 95 is longer than the width of the groove 86.

[0071] This embodiment also provides an intelligent method for determining the optimal dosage of asphalt rejuvenator, which uses an intelligent system for determining the optimal dosage of asphalt rejuvenator to determine the optimal dosage of asphalt rejuvenator; the determination method includes the following steps:

[0072] Step 1: Based on the testing requirements, preset the regenerant dosage parameters as multiple increasing sequences. ,in It can be expressed as mass fraction / % or the converted cumulative added volume, mL; the single addition amount between two adjacent groups is , mL; the difference It can be set to a fixed step size or segmented variable step size (large step first, then small step). The target viscosity can also be set. (Usually, the Brinell viscosity of the original asphalt sample at a specified temperature is taken) and the judgment criterion: the viscosity is equal to or closest to The optimal dosage of regenerator is the amount of regenerator added at that point.

[0073] Among them: the sequence range of regenerant dosage: approximately 0% to 10% (based on the mass fraction of the liquid to be tested); single step size: 0.2% to 1.0%, which can be refined to 0.2% to 0.5% when approaching the target range;

[0074] If volume control is used: the single addition amount is 0.2 to 2 mL, and the specific value can be matched with the asphalt sample volume of the sample container 71.

[0075] Step 2: During each round of addition, control the solenoid valve to open and start the metering pump, causing the metering pump to operate according to the preset schedule. (or equivalent volume) The regenerant is drawn from the regenerant storage tank, transported through pipelines to the front-end pipeline, and dispersed into the sample container through multiple outlet holes to achieve continuous quantitative addition of the same sample; after addition is completed, the solenoid valve is closed and the metering pump is stopped.

[0076] Step 3: In each increment... After adding the regenerant and completing in-situ mixing and temperature stabilization, the viscosity test results at the corresponding dosage points were obtained using a Brookfield viscosity tester. Multiple sets of data pairs are formed. The cumulative amount of regenerator will be... As the x-axis, viscosity Using y as the ordinate, we obtain the dosage-viscosity fitting curve. The curve typically shows a monotonically decreasing trend as the doping concentration increases.

[0077] The steps for determining the optimal dosage of the rejuvenator based on the dosage-viscosity fitting curve are as follows: Using the target viscosity of the original asphalt sample at the same test temperature... As a design objective, a value is taken on the viscosity coordinate axis. Draw a horizontal line; this horizontal line corresponds to the fitted curve. The intersection point is denoted as ( The x-coordinate of the intersection point This is the optimal dosage of the regenerator, which is defined as "the cumulative amount of regenerated asphalt whose viscosity is restored to the original viscosity of the tested liquid".

[0078] Specifically, the determination method includes the following steps;

[0079] Inject a preset amount of aged asphalt to be tested into the sample container 71, place the sample container 71 at the designated work station, and extend the front end pipe 84 to the preset position of the sample container 71.

[0080] Based on the test requirements, preset the regenerant dosage parameters and simultaneously set the extraction volume and delivery rate of the metering pump 82.

[0081] Each time a recycling agent is added to the sample container 71, the solenoid valve 83 on the delivery pipeline 81 is opened, and the metering pump 82 is started. The metering pump 82 extracts the corresponding volume of recycling agent from the recycling agent storage tank 80 according to the preset parameters. The recycling agent is delivered to the front-end pipeline 84 through the delivery pipeline 81, and then evenly injected into the asphalt in the sample container 71 through multiple liquid outlet holes 85 arranged at intervals on the side wall of the front-end pipeline 84, so as to achieve the mixing of recycling agent and asphalt.

[0082] After the regenerant is delivered, control solenoid valve 83 closes and metering pump 82 stops working.

[0083] The Brookfield viscosity tester starts working, and the rotor begins to rotate in the asphalt with added recycling agent. After a predetermined time, the viscosity test data of the asphalt after the addition of recycling agent is obtained.

[0084] Based on viscosity test data obtained from multiple tests, a "dosage-viscosity fitting curve" was obtained. Take on the viscosity coordinate axis Draw a horizontal line, which is the same as the fitted curve. The intersection point is denoted as The x-coordinate of the intersection point This is the optimal dosage of the regenerator.

[0085] Compared with existing technologies, the intelligent determination system and method for optimal dosage of asphalt recycling agent provided by this invention can achieve the following beneficial effects:

[0086] 1. By configuring a metering pump and a solenoid valve on the delivery pipeline, the system can automatically extract the corresponding volume of regenerant and inject it into the sample container according to the preset regenerant dosage parameters, thereby replacing the traditional manual measuring cup addition method. This not only realizes continuous titration measurement of a single sample, but also achieves precise control of the addition amount through the metering pump, effectively avoiding dosage errors that may be caused by manual operation, and has good experimental test reproducibility.

[0087] 2. After one measurement is completed, the next addition of regenerant can be performed automatically, which not only solves the problem of tedious and time-consuming manual addition process, but also significantly shortens the preparation time for dosage testing, reduces labor intensity, and improves overall testing efficiency.

[0088] 3. It can obtain more continuous test data results and can more accurately capture the moment when the asphalt reaches the target viscosity after adding the recycling agent, thereby obtaining more accurate optimal dosage results.

[0089] 4. A front-end pipe connected to the far end of the delivery pipeline extends into the inner wall of the sample container, and its side wall has multiple outlet holes spaced axially. The rejuvenator drawn by the metering pump flows to the front-end pipe through the delivery pipeline, and is finally injected into the asphalt at different heights in the sample container through these outlet holes. The rejuvenator in this application adopts a porous dispersion injection method into the asphalt, which can effectively improve the uniformity of the distribution of the rejuvenator in the asphalt. Compared with the traditional method of directly dripping the rejuvenator onto the top surface of the asphalt, this application can effectively reduce the deviation of the test results caused by local uneven concentration due to manual addition, thereby significantly improving the accuracy of the optimal dosage test results.

[0090] Example 2

[0091] The inventors discovered in actual testing that as rejuvenator was added to aged asphalt in successive steps, the viscosity of the asphalt showed a continuous decreasing trend. This caused the initially selected Brinell rotor range and speed to change with the viscosity range and no longer match the viscosity range of the liquid being tested at the current stage, thus affecting the applicability of the measurement and the accuracy of the data. The solution to the above problem is to replace the rotor with a matching one in a timely manner.

[0092] Based on this, another specific embodiment of the present invention discloses an intelligent determination system for the optimal dosage of asphalt recycling agent. The difference from Embodiment 1 is that the Brookfield viscosity measuring device in this embodiment has the function of automatically replacing and cleaning the rotor, which can automatically replace the rotor when needed to improve the accuracy of viscosity test results for aged asphalt mixed with recycling agent.

[0093] like Figures 3 to 7 As shown, the Brinell viscosity measuring device includes a viscometer test stage 10, a rotor 12, a lifting mechanism 30, a disassembly manipulator 20, and a transmission mechanism 40. The viscometer test stage 10 is movably connected to the main shaft 72 and has a downwardly extending rotating shaft 11. The rotor 12 is detachably connected to the rotating shaft 11 via fasteners. The lifting mechanism 30 is located on one side of the rotor 12 and can abut against and clamp the rotor 12. The disassembly manipulator 20 is located on the other side of the rotor 12 and can remove the fasteners, separating the rotor 12 from the rotating shaft 11. The transmission mechanism 40 is located on one side of the rotor 12 and is used to transport the disassembled rotor 12 and a new rotor 12 below the rotating shaft 11. The lifting mechanism 30 is used to connect the new rotor 12 to the rotating shaft 11, and the disassembly manipulator 20 connects the fasteners to the rotating shaft 11 and the new rotor 12.

[0094] The viscometer test stage 10 is lowered to immerse the rotor 12 in the asphalt for viscosity testing. During measurement, the sample container 71 is placed below the viscometer test stage 10. Each time a rejuvenating agent is added to the sample container, the viscometer test stage 10 is moved downwards on the main shaft 72, causing the rotor 12 to enter the asphalt mixed with the rejuvenating agent in the sample container 71. The viscometer test stage 10 controls the rotation of the rotating shaft 11 and records the experimental data. After each experiment, when a different rotor 12 needs to be replaced, the rotor 12 and the viscometer test stage 10 are first moved upwards to the disassembly position. Then, the lifting mechanism 30 is controlled to press against the rotor 12 and clamp it in place. The disassembly robot 20 removes the fasteners, at which point the rotor 12 separates from the rotating shaft 11. The disassembled rotor 12 is placed onto the transmission mechanism 40 by the lifting mechanism 30, which then transports it out. Simultaneously, a new rotor 12 is placed onto the transmission mechanism 40 and transported to below the rotating shaft 11. The lifting mechanism 30 mates the new rotor 12 with the rotating shaft 11. The disassembly robot 20 then connects the fasteners to the rotating shaft 11 and the new rotor 12, completing the installation of the rotor 12. The rotor 12 is preheated before installation. If the old rotor 12 is unavailable, the new rotor 12 can be installed directly.

[0095] In this embodiment, the viscometer testing platform 10 can be implemented using existing technology, including a support base and a lifting adjustment mechanism. The lifting adjustment mechanism includes a lifting column, a hand-cranked screw or electric push rod, and a guide rail. The viscometer testing platform 10 is driven to move up and down along the main shaft 72 by the hand-cranked screw or simple electric control, realizing the action of the rotor 12 immersing in and detaching from the asphalt to be tested. A rotary drive assembly is also provided, installed inside the viscometer testing platform 10, with one end connected to a stepper motor or servo motor, and the other end extending out of the viscometer testing platform 10 and connected to the rotating shaft 11. The motor is driven by gear or belt transmission, driving the rotating shaft 11 and the rotor 12 to rotate synchronously. A built-in torque sensor is used to detect the viscous torque on the rotor 12. A simple control panel is provided on the side of the viscometer testing platform 10 or it can be controlled by an external computer.

[0096] In this application, the rotor 12 is cylindrical, or the main body is cylindrical with a conical structure at the bottom. The rotor 12 can enter the interior of the sample container 71, which contains asphalt and has also undergone heat treatment.

[0097] In some alternative embodiments, the disassembly manipulator 20 includes a disassembly housing 21, a disassembly guide rail 22, a disassembly telescopic motor 23, a disassembly rotary motor 24, and a disassembly blade 25. The disassembly housing 21 is connected to the bottom surface of the viscometer test stage 10. The disassembly guide rail 22 is connected to the inner top surface of the disassembly housing 21 and is horizontally positioned towards the rotation shaft 11. The housing of the disassembly rotary motor 24 is slidably connected to the disassembly guide rail 22. The disassembly telescopic motor 23 is driven to drive the disassembly rotary motor 24. The drive shaft of the disassembly rotary motor 24 is connected to the disassembly blade 25. The disassembly telescopic motor 23 can drive the disassembly rotary motor 24 to move toward the fastener connected to the rotation shaft 11 and hold the disassembly blade 25 against the fastener, which includes a fastening screw.

[0098] In this embodiment, when it is necessary to disassemble or install fasteners, the disassembly telescopic motor 23 first drives the disassembly rotary motor 24 to move, so that the disassembly blade 25 abuts against the fastening screw. Then, the disassembly rotary motor 24 starts, driving the disassembly blade 25 to rotate synchronously, thereby realizing the operation of unscrewing or screwing in the fastening screw. At the same time, the disassembly telescopic motor 23 retracts synchronously or extends to the rotating shaft 11, realizing the full automation of fastener disassembly and installation.

[0099] The disassembly tool 25 is either flat or Phillips head, and the fastening screw has a groove corresponding to the disassembly tool 25. The disassembly tool 25 can be made using a magnet.

[0100] In this embodiment, the disassembly housing 21 is fixedly connected to the viscometer test stage 10, so that the relative horizontal position of the disassembly blade 25 and the fastening screw on the rotating shaft 11 is always fixed. This ensures that the disassembly blade 25 can be accurately aligned with the screw every time the fastener is disassembled or installed, and avoids misalignment between the disassembly blade 25 and the screw due to positional deviation.

[0101] In some alternative embodiments, the rotor 12 has a connecting shaft at the top, the top end of the connecting shaft is a semi-cylindrical structure, and the bottom end of the rotating shaft 11 is also a semi-cylindrical structure, so that the connecting shaft and the rotating shaft 11 can be precisely mated together. The connecting shaft and the rotating shaft 11 are respectively provided with threaded holes, and fastening screws are connected to the threaded holes.

[0102] The top end of the connecting shaft at the top of the rotor 12 is a semi-cylindrical structure, and the bottom end of the rotating shaft 11 is a matching semi-cylindrical structure. When the rotor 12 and the rotating shaft 11 are docked, the two semi-cylindrical structures fit together and engage to achieve quick positioning, so that the connecting shaft and the preset threaded hole on the rotating shaft 11 are automatically aligned. Then, the fastening screw is screwed into the aligned threaded hole to complete the fixed connection between the rotor 12 and the rotating shaft 11.

[0103] The fastening screws after the rotating shaft 11 is connected to the rotor 12 can be set to two, which are distributed vertically at intervals. In this way, a set of disassembly blades 25 and disassembly rotary motors 24 can be set to disassemble the two fastening screws respectively.

[0104] In some alternative embodiments, the transmission mechanism 40 includes a conveyor belt structure 41, a curved conveyor belt structure 42, and a conveyor chain structure 43. The conveyor chain structure 43 is parallel to and corresponding to the conveyor belt structure 41. The curved conveyor belt structure 42 is located below the rotating shaft 11, and the inlet end of the curved conveyor belt structure 42 is connected to the outlet end of the conveyor belt structure 41. The outlet end of the curved conveyor belt structure 42 is connected to the inlet end of the conveyor chain structure 43. The transmission mechanism 40 is connected to a horizontal drive mechanism, which can drive the transmission mechanism 40 away from the rotating shaft 11 or move it below the rotating shaft 11, so that the outlet section of the conveyor belt structure 41 is exactly below the rotating shaft 11.

[0105] In this embodiment, when the rotor 12 needs to be replaced, the horizontal drive mechanism drives the transmission mechanism 40 to move entirely below the rotating shaft 11. The outlet section of the conveyor belt structure 41 is located precisely below the rotating shaft 11, facilitating the placement of the old rotor 12 and the docking of the new rotor 12. When the equipment is performing testing, the horizontal drive mechanism drives the transmission mechanism 40 away from the rotating shaft 11 to avoid interfering with the lifting and lowering of the viscometer test platform 10 and its testing actions. After the old rotor 12 is disassembled, it is conveyed to the conveyor belt structure 43 via the conveyor belt structure 41 and the curved conveyor belt structure 42, and then conveyed out by the conveyor belt structure 43. The new rotor 12 is conveyed to the area below the rotating shaft 11 via the conveyor belt structure 41.

[0106] The conveyor belt structure 41, the curved conveyor belt structure 42, and the conveyor chain structure 43 all adopt existing conveyor structures. The conveyor belt structure 41 and the curved conveyor belt structure 42 both include a conveyor belt surface, rollers, and a conveyor motor. The conveyor motor drives the rollers to rotate and drives the conveyor belt surface to move. The conveyor chain structure 43 mainly includes a chain plate that supports the rotor 12, a drive motor, and a support frame.

[0107] In some optional embodiments, the lifting mechanism 30 includes a drive rail 31, a position drive mechanism, and a mechanical gripping mechanism. The drive rail 31 has a U-shaped structure and includes two drive rails, located on the inner and outer sides of the U-shaped structure formed by the conveyor belt structure 41, the curved conveyor belt structure 42, and the conveyor chain structure 43, respectively. Each drive rail 31 is provided with a set of position drive mechanisms and mechanical gripping mechanisms. The mechanical gripping mechanism is connected to the position drive mechanism and can drive the mechanical gripping mechanism to move on the drive rail 31. The mechanical gripping mechanism grips the rotor 12.

[0108] In this embodiment, the mechanical gripping mechanism can be a robotic arm, which is an existing device that can directly grip the rotor 12 and perform actions such as flipping and moving.

[0109] In some alternative embodiments, the position drive mechanism includes a conveyor belt assembly 32 and a movable seat 33. The conveyor belt assembly 32 is disposed on the side of the drive rail 31, and the movable seat 33 is connected to the side of the conveyor belt assembly 32 away from the conveyor mechanism 40. The mechanical gripping mechanism includes a gripping motor 34, an extension 35, and a gripping frame 36. The gripping motor 34 is connected to the movable seat 33, the extension 35 is connected to the drive shaft of the gripping motor 34, and the gripping frame 36 is connected to the extension 35 and is located above the conveyor belt structure 41.

[0110] In this embodiment, when installing a new rotor 12, the new rotor 12 is placed flat on the inlet end of the conveyor belt structure 41. Simultaneously, the control conveyor belt assembly 32 drives the inner movable seat 33 to move the extension 35 and the clamping frame 36 closer to the inlet end of the conveyor belt structure 41. The clamping motor 34 drives the extension 35 to rotate towards the inlet end, causing the clamping frame 36 to lie flat on the surface of the conveyor belt structure 41 before the rotor 12 is placed. Simultaneously, the outer movable seat 33 is moved closer to the middle of the conveyor belt structure 41. The clamping frame 36 on the inner movable seat 33 is located at the bottom of the cylindrical structure of the rotor 12. The other clamping frame 36 moves above the rotor 12 and contacts it. Then, the two clamping frames 36 clamp the rotor 12, while the clamping motor 34 rotates, and the conveyor belt assembly 32 drives the movable seat 33 to move away from the conveyor belt structure 41. In this way, the rotor 12 is erected. After being erected, the conveyor belt structure 41 begins to transport the rotor 12 towards the rotating shaft 11. When the rotor 12 is clamped, it remains placed on the conveyor belt structure 41 for support until it moves below the rotating shaft 11. Two clamping frames 36 connect the rotor 12 to the rotating shaft 11, while the disassembly blade 25 abuts against the fastening screw. The clamping frames 36 serve as a fixing structure, and the disassembly blade 25 applies force to install the fastening screw. When disassembling the old rotor 12, the clamping frame 36 directly clamps onto the rotor 12, and the disassembly knife 25 removes the fastening bolts. After disassembly, the clamping frame 36 and the clamping motor 34 move to place the rotor 12 vertically on the conveyor belt structure 41. At the same time, the rotor 12 is clamped and transitioned to the curved conveyor belt structure 42. Then, the force is slightly reduced so that the rotor 12 is supported on the curved conveyor belt structure 42. Since some models of rotor 12 are not easy to pass through turns when lying flat, these rotors 12 are placed vertically. After passing through the curved conveyor belt structure 42, the rotor 12 is clamped with force and transitioned to the conveyor chain structure 43. On the conveyor chain structure 43, the rotor 12 is laid flat to facilitate cleaning of the rotor 12.

[0111] In some alternative embodiments, the notch corresponding to the semi-cylindrical structure of the rotor 12 faces upwards. After the gripping frame 36 erects the rotor 12, the notch faces the direction of the rotation axis 11, and the notch on the rotation axis 11 is opposite to it. Therefore, after the rotor 12 is erected, it can directly correspond to the rotation axis 11. When gripping a new rotor 12, the gripping frame 36 located above the rotor 12 can move to the notch of the rotor 12 and fit into the notch. By controlling the gripping frame 36 to move back and forth at the notch, the semi-cylindrical structure of the rotor 12 can be made horizontal, thereby adjusting the posture of the rotor 12.

[0112] The clamping frame 36 includes a first baffle and a second baffle. The first baffle is perpendicular to the axial direction of the rotor 12, which lies flat on the conveyor belt structure 41. The second baffle is parallel to the axial direction of the rotor 12. Two of each baffle are included, forming a U-shaped structure. The second baffle protrudes from the first baffle and is slidably connected to it via a groove on the first baffle, allowing the second baffle to slide on the first baffle. The second baffle and the first baffle have sliding resistance. The rotor 12 can be positioned in the alignment space formed by the two second baffles, which is opposite to the rotation shaft 11, facilitating subsequent docking of the rotor 12. When the rotor 12 is positioned between the two second baffles, the sliding resistance is greater than the force exerted by the rotor 12 when it shakes and presses against the second baffles.

[0113] In some alternative embodiments, a three-axis slide rail module 70 is provided on the transmission mechanism 40. The three-axis slide rail module 70 is connected to the viscometer test stage 10 or an external structure. The three-axis slide rail module 70 adopts an existing structure. When the rotor 12 is docked, the three-axis slide rail module 70 can use a laser detector to detect the alignment status of the rotor 12 and the rotation axis 11, and make angle adjustments based on the three-axis slide rail module 70. Alternatively, when installing or removing the rotor 12, the transmission mechanism 40 and the moving seat 33 can be moved downward or upward to make the docking or removal of the rotor 12 more convenient. For example, when removing the rotor 12, the transmission mechanism 40 moves upward to receive and support the removed rotor 12.

[0114] In some alternative embodiments, the Brinell viscosity measuring device further includes a storage chamber 50. The storage chamber 50 has an outlet and an inlet on one side facing the transmission mechanism 40, and an openable and closable door 51 on the opposite side. A first push motor 52 is provided on the door 51. The outlet corresponds to the inlet of the conveyor belt structure 41, and the inlet corresponds to the outlet of the conveyor chain structure 43. A second push motor 53 is provided on the side of the storage chamber 50 corresponding to the conveyor chain structure 43. A heating module is provided inside the storage chamber 50 to preheat the rotor 12 inside the storage chamber 50.

[0115] The outlet of the storage bin 50 is higher than the conveyor belt structure 41, so that after the rotor 12 is placed in the storage bin 50, the second push motor 53 pushes the rotor 12 to the corresponding position of the outlet or places it directly in the corresponding position of the outlet, and then the first push motor 52 pushes it into the inlet end of the conveyor belt structure 41, and the rotor 12 is placed above a gripping frame 36.

[0116] The storage compartment 50 has an extension slot corresponding to the position of the conveyor belt structure 43. The conveyor belt structure 43 extends into the extension slot, allowing it to be positioned within the storage compartment 50. The second drive motor 53 is located on one side of the conveyor belt structure 43. Therefore, the conveyor belt structure 43 transmits the rotor 12 into the storage compartment 50, and the second drive motor 53 can push the rotor 12 on the conveyor belt structure 43 into the central placement area of ​​the storage compartment 50. The sealing door 51 can be opened, allowing the rotor 12 to be pre-placed at the corresponding position of the ejection port. The cylindrical structure of the rotor 12 faces the rotation shaft 11 and is placed flat during placement.

[0117] In this embodiment, the storage bin 50, the conveyor belt structure 41, the curved conveyor belt structure 42, and the conveyor chain structure 43 can all be connected to a support structure. The support structure is connected to the three-axis slide rail module 70, so that the storage bin 50, the conveyor belt structure 41, the curved conveyor belt structure 42, and the conveyor chain structure 43 can move together.

[0118] The storage compartment 50 is also equipped with a heating structure, such as a heating pipe that blows hot air into the heating pipe to preheat the rotor 12, or a heating wire that can be installed for direct preheating, while simultaneously drying the rinsed rotor 12.

[0119] In some alternative embodiments, the Brinell viscosity measuring device further includes a cleaning chamber, which is fitted onto the conveyor belt structure 43. The cleaning chamber is equipped with a rinsing nozzle and a rinsing pipe, the rinsing pipe being connected to the rinsing nozzle. The cleaning chamber is also equipped with a fan-shaped arrangement of cleaning brushes, distributed above the conveyor belt. The rotor 12 can be placed on the conveyor belt and enter the cleaning chamber to be rinsed by the rinsing nozzle and cleaned by the cleaning brushes.

[0120] The cleaning chamber is mounted on the conveyor belt structure 43, allowing the conveyor belt structure 43 to drive the horizontally lying rotor 12 directly into the cleaning chamber. One end of the rinsing pipe is connected to an external solvent supply system, and the other end is connected to the rinsing nozzle inside the cleaning chamber, which can continuously supply cleaning solvent, such as citrus terpene solvent, to the nozzle. The cleaning brushes inside the cleaning chamber are arranged in a fan shape above the conveyor belt, and the brush end faces can fit against the cylindrical surface of the horizontally lying rotor 12. After the old rotor 12 is transported to the conveyor belt structure 43 and laid flat, the conveyor belt drives the rotor 12 into the cleaning chamber at a constant speed. At this time, the rinsing nozzle is activated, and the cleaning solvent is sprayed evenly onto the upward-facing surface of the rotor 12 to dissolve the residual asphalt slurry on the rotor 12. At the same time, the rotor 12 moves with the conveyor belt, and the semi-circular cleaning brush generates relative friction with the upward-facing surface of the rotor 12 to wipe away stubborn residues that have not been completely removed after spraying. After the first side cleaning is completed, the conveyor belt rotates, and the clamping frame 36 on one side moves synchronously with the rotor 12. After reaching the initial entry position, it clamps the rotor 12 and drives it to flip over, so that the originally downward-facing surface of the rotor 12 is facing upward. Then the rinsing nozzle is activated again to spray, and the cleaning brush wipes the surface of the flipped rotor 12 simultaneously to achieve full surface cleaning of the rotor 12. After cleaning is completed, the conveyor belt structure 43 continues to drive the rotor 12 out of the cleaning chamber.

[0121] The cleaning chamber includes an upper shell 60 and a lower shell 61. The upper shell 60 is located above the conveyor belt, and the lower shell 61 is located below the conveyor belt. The upper shell 60 and the lower shell 61 are spaced apart, and a liquid-blocking curtain is provided at the space. The upper shell 60 has slots at both ends of the rotor 12’s recovery movement path.

[0122] The lower shell 61 can collect cleaning waste liquid in a centralized manner, which facilitates subsequent recycling and treatment, and improves the utilization rate and environmental friendliness of the solvent. The liquid slugging curtain further prevents solvent splashing. A liquid slugging curtain is also provided at the trough opening. A waterproof shell can be added outside the upper shell 60 and the lower shell 61 to increase the liquid separation distance. The gap between the upper shell 60 and the lower shell 61 allows the moving seat 33 to move, so that the clamping frame 36 can also perform corresponding actions when the rotor 12 is cleaning.

[0123] This application adopts a design where the rotor 12 is placed horizontally, which has the following advantages compared with the prior art method of directly connecting the rotor shaft 11 vertically: When the rotor 12 is placed horizontally in the storage compartment 50 of this application, the center of gravity of the rotor 12 is lower in the horizontal state, making storage and transfer more stable and less prone to tipping and damage; while in the prior art, the rotor 12 is placed vertically, which is prone to tilting and collision due to equipment vibration, increasing the risk of damage to the rotor 12. At the same time, the storage compartment 50 needs to be designed with a higher vertical dimension, resulting in a larger overall volume.

[0124] In this application, the rotor 12 enters the cleaning chamber lying flat, allowing the spray nozzles to cover the upward-facing surface of the rotor 12 from all directions. Combined with a semi-circular brush for close-fitting wiping, and after flipping, the other side of the surface can be cleaned, achieving a thorough cleaning of the entire surface of the rotor 12 without any blind spots. In existing technologies, when the rotor 12 is cleaned vertically, the bottom area is difficult to reach with the spray and brushes, leading to the accumulation of residual asphalt. This results in lower cleaning efficiency and cleanliness compared to the horizontally placed cleaning mode. The horizontally placed rotor 12 has a low center of gravity, making it less prone to swaying or tipping during transport on conveyor belts, curved conveyor belts, and conveyor chains. The overall equipment extends horizontally and has a lower vertical height, making it more suitable for installations in laboratories with limited space.

[0125] The viscosity of aged asphalt with added recycling agent was measured using a Brookfield viscometer, including the following steps:

[0126] Place the sample container 71 containing the aged asphalt to be tested under the viscometer test stand 10, and confirm that the new rotor 12 in the storage chamber 50 has been preheated.

[0127] The viscometer test stage 10 is controlled to move upward along the main shaft 72 to the preset disassembly position. The lifting mechanism 30 is activated to hold and clamp the old rotor 12 currently connected to the rotating shaft 11. Then, the disassembly robot 20 is controlled to move to the connection position between the rotating shaft 11 and the old rotor 12. The disassembly blade 25 of the disassembly robot 20 performs a disassembly operation on the fasteners (fastening screws) to separate the old rotor 12 from the rotating shaft 11.

[0128] The lifting mechanism 30 places the disassembled old rotor 12 onto the transmission mechanism 40, controls the transmission mechanism 40 to start, and transports the old rotor 12 to the designated position (or to the cleaning chamber for cleaning).

[0129] The control transmission mechanism 40 transports the preheated new rotor 12 from the storage compartment 50 to directly below the rotating shaft 11. The lifting mechanism 30 clamps the new rotor 12 and precisely aligns the semi-cylindrical structure at the top of its connecting shaft with the bottom of the rotating shaft 11. Then, the control disassembly robot 20 installs fasteners at the connection point between the rotating shaft 11 and the new rotor 12, thus completing the fixation of the new rotor 12.

[0130] The viscometer test stand 10 is controlled to move downward along the main shaft 72, driving the newly installed rotor 12 to be immersed in the asphalt to be tested (i.e., aged asphalt with added recycling agent) in the sample container 71; the rotation drive component inside the viscometer test stand 10 is started to drive the rotor 12 to rotate at a constant speed, the viscous torque on the rotor 12 is detected by the built-in torque sensor, and the viscosity value of the asphalt to be tested is calculated based on the detected data, thus completing the measurement and recording the data.

[0131] Compared with the prior art, the intelligent determination system for optimal dosage of asphalt recycling agent provided by the present invention, in addition to having the same beneficial effects as in Example 1, also has the following beneficial effects:

[0132] 1. When using the Brookfield viscosity tester of this embodiment to measure the viscosity of asphalt, the rotor can be automatically replaced and the replaced rotor can be cleaned when it is necessary to replace the rotor. By automatically replacing the matching rotor, the accuracy of the viscosity test results of aged asphalt mixed with recycling agent is improved.

[0133] 2. No manual contact with the preheated rotor is required during viscosity measurement, avoiding burns during manual operation; at the same time, the rotor can be disassembled and installed without cooling, ensuring that the rotor always maintains the preset preheating temperature and avoiding temperature loss that affects the accuracy of viscosity test data.

[0134] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An intelligent system for determining the optimal dosage of asphalt recycling agent, characterized in that, include: The Brinell viscosity tester has a sample container and a rotor, and is used to acquire multiple sets of asphalt viscosity data after multiple additions of rejuvenator into the sample container. A regenerant storage tank, which stores regenerant, is connected to a conveying pipeline; A metering pump is installed on the conveying pipeline, and the metering pump draws a predetermined amount of regenerant from the regenerant storage tank and conveys it through the conveying pipeline; A solenoid valve is installed on the conveying pipeline and is used to control the opening and closing of the conveying pipeline; A front-end pipeline is connected to the conveying pipeline and extends to the inner wall of the sample container. The side wall of the front-end pipeline is provided with multiple outlet holes arranged at intervals along the extension direction of the front-end pipeline. The regenerant can enter the sample container through the outlet holes and mix with the asphalt.

2. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 1, characterized in that, The inner wall of the sample container is provided with a rectangular groove, the front end pipe is a rectangular pipe, the front end pipe is snapped into the groove, and the liquid outlet is opened on the outer wall surface of the front end pipe facing the central axis of the sample container.

3. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 2, characterized in that, The outer wall surface of the front-end pipeline facing the central axis of the sample container is coplanar with the inner wall surface of the sample container.

4. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 2, characterized in that, The front-end pipeline is made of a flexible and high-temperature resistant material.

5. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 4, characterized in that, The front-end pipeline is made of polytetrafluoroethylene.

6. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 2, characterized in that, The main body of the sample container is a cylindrical structure, and the bottom of the sample container is a conical structure. The front end pipe has two branch pipes, and the sample container has grooves on both sides. The two branch pipes are respectively set in the grooves through interference fits. The grooves extend downward along the side wall of the sample container and finally extend to the middle of the conical surface at the bottom of the sample container.

7. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 2, characterized in that, The outlet hole is sealed with a rubber block, and the rubber block has a cross-shaped groove. The cross-shaped groove is closed when no pressure is applied.

8. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 2, characterized in that, It also includes a pressing mechanism that can extend into the sample container to flatten the front-end pipe installed in the groove.

9. The intelligent determination system for optimal dosage of asphalt recycling agent according to claim 1, characterized in that, The Brinell viscosity testing device also includes a viscometer test stage, which is movably connected to the main shaft. The viscometer test stage has a downwardly extending rotating shaft. The sample container is placed directly below the viscometer test stage. The rotor is detachably connected to the rotating shaft by fasteners.

10. A method for intelligently determining the optimal dosage of asphalt recycling agent, characterized in that, The intelligent determination system for optimal dosage of asphalt recycling agent as described in any one of claims 1-9 is adopted; Based on multiple sets of asphalt viscosity data obtained from the Brinell viscosity testing device, the optimal dosage of asphalt rejuvenator was determined.

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