Asphalt mixture performance experiment device

Abstract

The invention relates to the field of asphalt experiments, in particular to an asphalt mixture performance experiment device. The experimental device comprises an experimental rack, a plurality of rope fixing units and a tensioning unit, each rope fixing unit comprises a fixing pipe installed on the experimental rack and at least three thin ropes, one ends of the thin ropes are installed on the outer wall of the fixing pipe at equal angles with the axis of the fixing pipe as the center line, and the other ends of the thin ropes are tied to aggregate; the tensioning unit comprises a plurality of circular top pieces which are located above the aggregate and correspond to the fixing pipes one to one, the circular top pieces are installed on the experiment table frame in a lifting mode in the axis direction of the fixing pipes, and at least three semicircular grooves corresponding to the at least three thin ropes one to one are formed in the upper end faces of the circular top pieces in a penetrating mode; the axis of the thin rope, the axis of the semicircular groove and the axis of the fixed pipe are positioned in the same plane, so that the problem that the adhesion performance detection result of the asphalt mixture is influenced due to the fact that aggregate is easy to shake and rotate in the experiment process can be solved.

Description

Technical Field

[0001] The invention relates to the field of asphalt experiments, in particular to an asphalt mixture performance experiment device. Background Art

[0002] In road engineering, the adhesion between asphalt mixture and rock is a key indicator for evaluating pavement durability. The boiling method, a commonly used testing method, quantifies the adhesion between asphalt-coated aggregates by immersing them in boiling water and observing the degree of asphalt film peeling.

[0003] However, traditional testing generally uses a single string to secure the aggregate. This method is prone to spin during sample transfer, immersion, or removal due to factors such as water impact and center of gravity shift. This uncontrolled rotation can cause centrifugal peeling or plastic flow of the partially cured asphalt, resulting in defects such as uneven thickness, localized accumulation, or thinning of the asphalt film, directly affecting the accuracy of adhesion performance assessments.

[0004] In summary, the core problem of the water boiling method test is that the single-rope fixing method cannot stably constrain the spatial posture of the aggregate, which easily leads to damage to the uniformity of the asphalt film, thereby affecting the accuracy and repeatability of the asphalt mixture and aggregate adhesion performance test. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an asphalt mixture performance test device to solve the problem that aggregates are prone to shaking and rotating during the experiment, thereby affecting the adhesion performance test results of the asphalt mixture.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides an asphalt mixture performance test device, which includes: Experimental bench; Several rope fixing units, each of which is arranged on a test bench, each of which comprises a fixing tube and at least three thin ropes. The fixing tube is mounted on the test bench, one end of each thin rope is mounted on the outer wall of the fixing tube at an equal angle with the axis of the fixing tube as the centerline, and the other end of each thin rope is tied to the aggregate; The tensioning unit includes a plurality of circular top plates, and the plurality of circular top plates correspond one-to-one to a plurality of fixed tubes. The circular top plates are lifted and installed on the experimental bench, and the lifting axis of the circular top plate coincides with the axis of the fixed tube. The circular top plate is located directly above the aggregate, and the diameter of the circular top plate is smaller than the inner diameter of the fixed tube. At least three semicircular grooves are provided on the upper end surface of the circular top plate, and the semicircular grooves are connected to the side walls of the circular top plate. The semicircular grooves correspond one-to-one to the thin ropes, and the axis of the thin rope, the axis of the semicircular grooves and the axis of the fixed tube are located in the same plane.

[0007] As an optional solution, the rope fixing unit further includes at least three adjustment modules for adjusting the length of the thin rope, and the adjustment modules correspond to the thin ropes one by one; The adjustment module includes a first pressing plate and a second pressing plate; The first pressing plate is fixedly mounted on the outer wall of the fixed tube; The second pressing plate is rotatably mounted on the first pressing plate, and the first pressing plate and the second pressing plate are interlocked and clamp the string between the first pressing plate and the second pressing plate.

[0008] As an optional solution, the rope fixing unit further includes a plurality of positioning modules, and the positioning modules correspond one to one with the thin ropes; The positioning unit includes a U-shaped block, a light bulb, a power supply box and an electrode sheet; The U-shaped block includes a first horizontal end, a second horizontal end, and a vertical end; the first horizontal end of the U-shaped block is rotatably mounted on the side wall of the fixed tube; The negative electrode sheet is fixedly mounted on the end portion of the second horizontal end of the U-shaped block. When the negative electrode sheet contacts the string, the center line of the U-shaped block, the axis of the string, the axis of the semicircular groove, and the axis of the fixing tube are located in the same plane. The power box is fixedly mounted on the U-shaped block, a positive wire is led out from one end of the power box, the positive wire is electrically connected to the first pressure plate, and a negative wire is led out from the other end of the power box, the negative wire is electrically connected to the negative electrode sheet; The light bulb is connected in series to the positive wire / negative wire; The string is made of conductive material; The first pressing plate is made of conductive material.

[0009] As an optional solution, the tensioning unit further includes a first linear power source and a plurality of connecting columns; The first linear power source is fixedly mounted on the experimental bench, and the extension direction of the movable end of the first linear power source is parallel to the axis of the fixed tube; The plurality of connecting columns are fixedly connected to the telescopic end of the first linear power source, the plurality of connecting columns correspond one to one with the plurality of fixed tubes, and the axis of the connecting column coincides with the axis of the fixed tube; The circular top sheets correspond to the connecting posts one by one, and the circular top sheets are fixedly mounted on the ends of the connecting posts.

[0010] As an optional solution, the experimental device further includes a rotating unit, which includes a connecting block, a first rotating disk, a second rotating disk, a fixing bracket, a transmission slot and a transmission column; The connecting block is fixedly mounted on the movable end of the first linear power source, and the plurality of connecting columns are fixedly mounted on the connecting block; Several circular top sheets are located below the connecting block; The first rotating disk is rotatably mounted on the lower end surface of the connecting block, and the rotation axis of the first rotating disk is parallel to the axis of the fixed pipe; The fixed bracket is fixedly installed on the experimental bench; The second rotating disk is located below the first rotating disk, and the second rotating disk is rotatably mounted on a fixed bracket, and the rotation axis of the second rotating disk coincides with the rotation axis of the first rotating disk; A rectangular transmission groove is formed through the upper end surface of the second rotating disk; The transmission post cooperates with the transmission slot, one end of the transmission post is fixedly mounted on the first rotating disk, and the other end of the transmission post slides through the transmission slot; The plurality of fixed tubes are detachably mounted on the second rotating disk, and the plurality of fixed tubes are arranged in a circular array with the rotating axis of the second rotating disk as the center line.

[0011] As an optional solution, the experimental device further includes a distance measuring sensor; The distance sensor is fixedly mounted on the circular top sheet, the axis of the distance sensor coincides with the axis of the circular top sheet, and the measuring end of the distance sensor is mounted downward to measure the distance between the circular top sheet and the aggregate.

[0012] As an optional solution, the experimental device further includes a through-beam sensor and a sensor bracket; The sensor bracket is fixedly mounted on the experimental bench, and the sensor bracket is located below the aggregate; The middle of the sensor bracket is provided with a mounting slot, which is located directly below the aggregate, and the distance between the opposite side walls of the mounting slot is greater than the distance between the two farthest aggregates. The through-beam sensor is fixedly mounted on two opposite side walls of the mounting groove.

[0013] As an optional solution, the experimental device further includes a first linear module, a second linear module, a support base, an asphalt heating unit and a boiling water heating unit; The first linear module is fixedly mounted on the experimental bench, and the moving direction of the movable end of the first linear module is parallel to the axis of the fixed tube; The second linear module is fixedly mounted on the movable end of the first linear module, and the moving direction of the movable end of the second linear module is perpendicular to the axis of the fixed tube; The support base is fixedly mounted on the movable end of the second linear module, and the asphalt heating unit and the boiling water heating unit are fixedly mounted on the support base in sequence along a moving direction parallel to the movable end of the second linear module; The asphalt heating unit includes an asphalt graduated cylinder, and the boiling water heating unit includes a boiling water graduated cylinder; The first linear module drives the asphalt measuring cylinder and the boiling water measuring cylinder to move upward until the aggregate extends into the asphalt measuring cylinder / boiling water measuring cylinder.

[0014] As an optional solution, the asphalt heating unit and the boiling water heating unit both include a heater and a measuring cylinder limiting ring; The heater is fixedly mounted on the support base, and the measuring cylinder limiting ring is located above the heater and fixedly mounted on the support base; The asphalt measuring cylinder passes through the measuring cylinder limiting ring of the asphalt heating unit and is placed on the heater of the asphalt heating unit, and the asphalt measuring cylinder stores the asphalt mixture; The boiling water graduated cylinder passes through the graduated cylinder limiting ring of the boiling water heating unit and is placed on the heater of the boiling water heating unit. Water is stored in the boiling water graduated cylinder.

[0015] As an optional solution, the experimental device further includes a baffle unit, which includes a baffle bracket, a second linear power source, and a baffle; The second linear power source is fixedly mounted on the experimental bench, and the extension direction of the movable end of the second linear power source is perpendicular to the axis of the fixed tube; The baffle bracket is fixedly mounted on the movable end of the second linear power source; The baffle is rotatably mounted on the baffle bracket, and the rotation axis of the baffle is perpendicular to the axis of the fixed pipe; When the movable end of the second linear power source is extended to the farthest position, the baffle is located directly below the mounting groove.

[0016] As described above, the asphalt mixture performance test device of the present invention has at least the following beneficial effects: 1. This application utilizes a fixed tube, at least three thin ropes, and a circular top plate. The aggregate is suspended directly below the fixed tube by the at least three thin ropes. As the circular top plate descends, the thin ropes opposite the semicircular grooves gradually enter and contact the semicircular grooves. The circular top plate then restricts the movement of the thin ropes suspended from the aggregate, thereby reducing the shaking and rotation of the aggregate during the test and, in turn, lowering the error in the testing of the adhesion performance of the asphalt mixture. 2. The present application provides several positioning modules, each comprising a light bulb, a power supply box, a first pressure plate, and an electrode sheet. The positive and negative wires extending from the power supply box are electrically connected to the first pressure plate and the electrode sheet, respectively. A complete electrical circuit is formed by the contact of a thin rope with the first pressure plate and the electrode sheet. The light bulb is connected in series to this electrical circuit. Therefore, when the length of the thin rope is adjusted so that the thin rope rests on the electrode sheet, the light bulb will illuminate due to its connection with the power supply box, thereby determining the length of the thin rope. When at least three thin ropes on the fixed tube all contact the electrode sheets of the positioning modules corresponding to the thin ropes, the center of gravity of the aggregate below can be adjusted to the axis of the fixed tube, thereby adjusting the axes of the semicircular groove, the thin rope, and the fixed tube to be aligned in the same plane. 3. The present application provides a first rotating disk, a second rotating disk, a transmission slot, and a transmission column; a plurality of the fixed tubes are arranged in a circular array on the second rotating disk with the rotation axis of the second rotating disk as the center line. The first rotating disk drives the second rotating disk to rotate synchronously via the transmission column passing through the transmission slot, thereby switching the positions of different fixed tubes, further facilitating the experimenter to adjust the thin ropes on different fixed tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the three-dimensional structure of the front side of the experimental device of the present invention; Figure 2 Shown is a schematic diagram of the three-dimensional structure of the back side of the experimental device of the present invention; Figure 3 Shown is a schematic diagram of the three-dimensional structure of the rope fixing unit of the present invention; Figure 4 Display as Figure 3 A magnified schematic diagram of point A in the middle; Figure 5 Shown is a cross-sectional view of the structure of the rope fixing unit of the present invention; Figure 6 Shown is a schematic diagram of the three-dimensional structure of a portion of the tensioning unit and a portion of the rotating unit of the present invention; Figure 7 Shown is an exploded schematic diagram of the first rotating disk, the second rotating disk and the fixed bracket of the present invention; Figure 8 Shown is a partial three-dimensional structural schematic diagram of the experimental device of the present invention; Figure 9 Shown is a schematic diagram of the combined three-dimensional structure of the first linear module and the second linear module of the present invention; Figure 10 Shown is a schematic diagram of the three-dimensional structure of the baffle unit of the present invention; Figure 11 Shown is a schematic diagram of the three-dimensional structure of the scraper unit of the present invention; Figure: 1. Test bench, 2. Rope fixing unit, 3. Tensioning unit, 4. Rotation unit, 5. Distance sensor, 6. Through-beam sensor, 7. Sensor bracket, 8. First linear module, 9. Second linear module, 10. Support base, 11. Asphalt heating unit, 12. Boiling water heating unit, 13. Baffle unit, 14. Scraper unit, 15. Aggregate, 16. Mounting slot; 201. Fixed tube, 202. String, 203. Adjustment module, 204. Positioning module; 301. Circular top plate, 302. First linear power source, 303. Connecting column; 401. First rotating disk, 402. Second rotating disk, 403. Fixed bracket, 404. Transmission slot, 405. Transmission column, 406. Connecting block; 1101. Heater, 1102. Measuring cylinder limit ring, 1103. Asphalt measuring cylinder; 1201. Boiling water graduated cylinder; 1301. Baffle bracket, 1302. Second linear power source, 1303. Baffle; 1401. Third linear power source, 1402. Fourth linear power source, 1404. Connecting plate, 1405. Scraper, 1406. Sprinkler; 2031. First pressing plate, 2032. Second pressing plate, 2033. Compression channel; 2041. U-shaped block, 2042. Light bulb, 2043. Power supply box, 2044. Electrode sheet. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0019] See also Figures 1 to 11. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0020] The following embodiments are for illustration only and can be combined with each other, and are not limited to the contents presented in the following single embodiments.

[0021] In this embodiment, please refer to Figure 1 、 Figure 3 、 Figure 6 and Figure 8 The present invention provides an asphalt mixture performance test device, which includes: Experimental bench 1; Several rope fixing units 2, each of which is arranged on the experimental bench 1, and each of which includes a fixed tube 201 and at least three thin ropes 202. The fixed tube 201 is installed on the experimental bench 1, and one end of the thin rope 202 is installed on the outer wall of the fixed tube 201 at an equal angle with the axis of the fixed tube 201 as the center line, and the other end of the thin rope 202 is tied to the aggregate 15; The tensioning unit 3 comprises a plurality of circular top sheets 301, and the plurality of circular top sheets 301 correspond one-to-one to the plurality of fixed tubes 201. The circular top sheets 301 are lifted and installed on the experimental bench 1. The lifting axis of the circular top sheet 301 coincides with the axis of the fixed tube 201. The circular top sheet 301 is located directly above the aggregate 15. The diameter of the circular top sheet 301 is smaller than the inner diameter of the fixed tube 201. At least three semicircular grooves are provided on the upper end surface of the circular top sheet 301. The semicircular grooves are connected to the side walls of the circular top sheet 301. The semicircular grooves correspond one-to-one to the thin ropes 202. The axis of the thin rope 202, the axis of the semicircular grooves and the axis of the fixed tube 201 are located in the same plane. Here, in this embodiment, the number of the thin ropes 202 fixed on the same fixed tube 201 is three, and the number of the semicircular grooves on the circular top sheet 301 corresponding to the fixed tube 201 is three. The three thin ropes 202 form a cone structure that is wide at the top and narrow at the bottom, which can form a stable pulling and fixing effect on the aggregate 15 from three directions, effectively preventing the aggregate 15 from shaking or deflecting when subjected to force. When the circular top sheet 301 moves downward, the three semicircular grooves gradually approach the corresponding three thin ropes 202. When the side walls of the semicircular grooves are in close contact with the corresponding thin ropes 202, the circular top sheet 301 is in a tensioning position. The circular top sheet 301 tensions the three thin ropes 202 suspended on the aggregate 15 and restricts the movement of the thin ropes 202. Through this setting, the shaking and rotation of the aggregate 15 during the experiment can be reduced, thereby reducing the detection error of the adhesion performance of the asphalt mixture.

[0022] In this embodiment, please refer to Figure 3 and 4 , the rope fixing unit 2 further includes at least three adjustment modules 203 for adjusting the length of the thin rope 202, and the adjustment modules 203 correspond to the thin ropes 202 one by one; The adjustment module 203 includes a first pressing plate 2031 and a second pressing plate 2032; The first pressing plate 2031 is fixedly mounted on the outer wall of the fixed tube 201; The second pressing plate 2032 is rotatably mounted on the first pressing plate 2031 , and the first pressing plate 2031 and the second pressing plate 2032 are interlocked and the string 202 is clamped between the first pressing plate 2031 and the second pressing plate 2032 ; Here, the adjustment module 203 also includes a first semicircular channel and a second semicircular channel; the first semicircular channel is opened through the upper end surface of the first pressing plate 2031, the axis of the first semicircular channel is parallel to the axis of the fixed tube 201, and the first semicircular channel is connected to the side wall of the first pressing plate 2031; the second semicircular channel is opened through the upper end surface of the second pressing plate 2032, the axis of the second semicircular channel is parallel to the axis of the fixed tube 201, and the second semicircular channel is connected to the side wall of the second pressing plate 2032; when the second pressing plate 2032 is rotated and fastened to the first pressing plate 2031, the first semicircular channel and the second semicircular channel are opposite to each other and form a clamping channel 2033, the diameter of the clamping channel 2033 is smaller than the diameter of the string 202, thereby clamping the string 202 between the first pressing plate 2031 and the second pressing plate 2032; Here, the fastening form of the second pressing plate 2032 and the first pressing plate 2031 is not limited, and can be a buckle fastening form, or a magnetic fastening form by providing mutually attracted magnets on the first pressing plate 2031 and the second pressing plate 2031; Here, by adjusting the position where the string 202 is compressed, the length of the string 202 between the aggregate 15 and the fixed tube 201 is adjusted, thereby adjusting the distance between the aggregate 15 and the fixed tube 201 and the center of gravity of the aggregate 15; Through this arrangement, the position and center of gravity of the aggregate 15 tied to the fixed tube 201 can be easily adjusted, effectively reducing the influence of the different winding methods of at least three thin ropes 202 on the position and center of gravity of different aggregates 15.

[0023] In this embodiment, please refer to Figure 3 and 5 , the rope fixing unit 2 further includes a plurality of positioning modules 204, and the positioning modules 204 correspond one to one with the thin ropes 202; The positioning unit includes a U-shaped block 2041, a light bulb 2042, a power box 2043 and an electrode sheet 2044; The U-shaped block 2041 includes a first horizontal end, a second horizontal end, and a vertical end; the first horizontal end of the U-shaped block 2041 is rotatably mounted on the side wall of the fixed tube 201; The negative electrode sheet is fixedly mounted on the end of the second horizontal end of the U-shaped block 2041. When the negative electrode sheet contacts the string 202, the center line of the U-shaped block 2041, the axis of the string 202, the axis of the semicircular groove, and the axis of the fixing tube 201 are located in the same plane. The power box 2043 is fixedly mounted on the U-shaped block 2041. A positive wire is led out from one end of the power box 2043. The positive wire is electrically connected to the first pressing plate 2031. A negative wire is led out from the other end of the power box 2043. The negative wire is electrically connected to the negative electrode sheet. The light bulb 2042 is connected in series to the positive wire / negative wire; The string 202 is made of conductive material; The first pressing plate 2031 is made of conductive material; Here, in this embodiment, the rotation axis of the U-shaped block 2041 is perpendicular to the axis of the fixed tube 201. When the U-shaped block 2041 is rotated until the second horizontal end is located below the lower end surface of the fixed tube 201 and the center line of the U-shaped block 2041, the axis of the string 202, the axis of the semicircular groove, and the axis of the fixed tube 201 are located in the same plane, and the opening of the U-shaped block 2041 faces the axis of the fixed tube 201, the electrode sheet 2044 is in the electrode sheet 2044 working position. Here, first, one end of the string 202 is pressed tightly between the first pressing plate 2031 and the second pressing plate 2032. When the circular top plate 301 moves downward to the designated position, the U-shaped block 2041 is rotated so that the electrode sheet 2044 is in the working position of the electrode sheet 2044. At this time, the length of the string 202 is adjusted so that the string 202 contacts the corresponding electrode sheet 2044. Because the positive and negative wires led out of the power box 2043 are electrically connected to the first pressing plate 2031 and the electrode sheet 2044 respectively, when the string 202 contacts the first pressing plate 2031 and the electrode sheet 2044, a complete power circuit is formed, thereby causing the light bulb 2042 connected in series with the positive or negative wire to light up. Here, the material of the string 202 is not limited, and it can be a silver-plated nylon fiber string or a conductive rubber string; Here, the material of the first pressing plate 2031 is not limited, and can be a copper sheet or an iron sheet; Through this setting, by observing whether the light bulb 2042 is lit, the experimenter can judge whether the axis of the thin rope 202 corresponding to the light bulb 2042 is located in the same plane as the axis of the corresponding semicircular groove and the axis of the fixed tube 201, providing an obvious reference for whether the center of gravity of the aggregate 15 is on the axis of the fixed tube 201. If the light bulb 2042 is lit intermittently, it can also be used to judge whether the aggregate 15 is in a state of continuous shaking.

[0024] In this embodiment, please refer to Figure 1 、 Figure 6 、 Figure 7 and Figure 8 , the tensioning unit 3 further includes a first linear power source 302 and a plurality of connecting columns 303; The first linear power source 302 is fixedly mounted on the experimental bench 1 , and the extension direction of the movable end of the first linear power source 302 is parallel to the axis of the fixed tube 201 ; Here, the form of the first linear power source 302 is not limited, and can be a linear cylinder or an electric push rod. In this embodiment, the first linear power source 302 is a linear cylinder. The plurality of connecting columns 303 are fixedly connected to the telescopic end of the first linear power source 302 . The plurality of connecting columns 303 correspond to the plurality of fixed tubes 201 one by one, and the axis of the connecting column 303 coincides with the axis of the fixed tube 201 . The circular top sheets 301 correspond to the connecting posts 303 one by one, and the circular top sheets 301 are fixedly mounted on the ends of the connecting posts 303; The experimental device further includes a rotating unit 4, which includes a connecting block 406, a first rotating disk 401, a second rotating disk 402, a fixing bracket 403, a transmission slot 404 and a transmission column 405; The connecting block 406 is fixedly mounted on the movable end of the first linear power source 302, and the connecting columns 303 are fixedly mounted on the connecting block 406; Several of the circular top sheets 301 are located below the connecting block 406; The first rotating disk 401 is rotatably mounted on the lower end surface of the connecting block 406 , and the rotation axis of the first rotating disk 401 is parallel to the axis of the fixed tube 201 ; The fixing bracket 403 is fixedly installed on the experimental bench 1; The second rotating disk 402 is located below the first rotating disk 401. The second rotating disk 402 is rotatably mounted on the fixed bracket 403. The rotation axis of the second rotating disk 402 coincides with the rotation axis of the first rotating disk 401. A rectangular transmission slot 404 is formed through the upper end surface of the second rotating disk 402; The transmission column 405 cooperates with the transmission slot 404 , one end of the transmission column 405 is fixedly mounted on the first rotating disk 401 , and the other end of the transmission column 405 slides through the transmission slot 404 ; Here, a first rotating power source is fixedly mounted on the connecting block 406. In this embodiment, the first rotating power source is a motor. The output shaft of the first rotating power source passes through the upper and lower end surfaces of the connecting block 406 and is fixedly connected to the first rotating disk 401. The first rotating power source drives the first rotating disk 401 to rotate, and the first rotating disk 401 drives the second rotating disk 402 to rotate accordingly through the transmission slot 404. At this time, the connecting column 303 located on the first rotating disk 401 and the fixed tube 201 located on the second rotating disk 402 rotate synchronously. Here, the lower end surface of the transmission column 405 is always located below the upper end surface of the first rotating disk 401; The plurality of fixed tubes 201 are detachably mounted on the second rotating disk 402 , and the plurality of fixed tubes 201 are arranged in a circular pattern with the rotating axis of the second rotating disk 402 as the center line; Here, in this embodiment, the number of the rope fixing units 2 is five, and the five fixing tubes 201 are arranged in a circular array on the lower end surface of the second rotating disk 402 with the rotation axis of the second rotating disk 402 as the center line. The first linear power source drives the connecting block 406 to slide downward, thereby driving the first rotating disk 401 and the five connecting columns 303 fixedly installed on the first rotating disk 401 to slide downward, and one end of the connecting column 303 slides downward and passes through the fixing tube 201; Here, there is no limitation on the form in which the fixing tube 201 is detachably mounted on the second rotating disk 402 , and it can be snap-fitted or magnetically attached. Through this setting, the positions of different fixing tubes 201 can be switched, which further facilitates the experimenter to adjust the thin ropes 202 on different fixing tubes 201.

[0025] In this embodiment, please refer to Figure 6 and 7 , the experimental device also includes a distance measuring sensor 5; The distance sensor 5 is fixedly mounted on the circular top sheet 301, and the axis of the distance sensor 5 coincides with the axis of the circular top sheet 301. The measuring end of the distance sensor 5 is mounted downward and measures the distance between the circular top sheet 301 and the aggregate 15; Here, the form of the distance measuring sensor 5 is not limited, and it can be an ultrasonic distance measuring sensor or a laser distance measuring sensor; Here, when the circular top sheet 301 moves downward to the tensioning position, the different aggregates 15 are first adjusted to the same height by the distance sensor 5, and then the center of gravity of the aggregates 15 is adjusted to the axis of the fixed tube 201 by observing the lighting status of the light bulb 2042 corresponding to each string 202; Through this setting, the distance between the circular top sheet 301 and the aggregate 15 is measured by the distance measuring sensor 5, which facilitates more accurate adjustment of the heights of different aggregates 15 so that different aggregates 15 are located at the same height. Furthermore, after the circular top sheet 301 is lowered to the specified position, the circular top sheets 301 corresponding to different aggregates 15 have the same degree of tension on the corresponding thin ropes 202, avoiding the problem that the circular top sheet 301 may not be able to tension the thin rope 202 of a certain fixed tube 201 or over-tighten it.

[0026] In this embodiment, please refer to Figure 8 , the experimental device also includes a through-beam sensor 6 and a sensor bracket 7; The sensor bracket 7 is fixedly mounted on the experimental bench 1 and is located below the aggregate 15; The middle of the sensor bracket 7 is provided with a mounting groove 16, which is located directly below the aggregate 15. The distance between the mounting groove 16 and the opposite side walls is greater than the distance between the two farthest aggregates 15. The through-beam sensor 6 is fixedly mounted on two opposite side walls of the mounting groove 16; Here, the form of the beam sensor 6 is not limited, and it can be a photoelectric beam sensor or an ultrasonic beam sensor; Here, the through-beam sensor 6 consists of a transmitter and a receiver, mounted on opposite sides of the mounting slot 16. The transmitter continuously transmits signals to the receiver, establishing a detection path between the two. When asphalt drips from the asphalt-soaked aggregate 15, the dripping asphalt blocks the detection path. Once the detection path is blocked, it indicates that the asphalt has not yet completely dried. If the asphalt measuring cylinder 1103 is moved, the wet asphalt will easily drip, thus contaminating the equipment. Through this setting, the through-beam sensor 6 can monitor the spatial status below the aggregate 15 in real time. When the signal transmission between the transmitter and the receiver is interrupted due to asphalt dripping, the system will automatically suspend the movement operation of the asphalt measuring cylinder 1103, which not only effectively avoids the contamination of the experimental device by asphalt dripping, but also reduces the cleaning and maintenance costs.

[0027] In this embodiment, please refer to Figure 1 and 9 , the experimental device also includes a first linear module 8, a second linear module 9, a support base 10, an asphalt heating unit 11 and a boiling water heating unit 12; The first linear module 8 is fixedly mounted on the experimental bench 1 , and the moving direction of the movable end of the first linear module 8 is parallel to the axis of the fixed tube 201 ; The second linear module 9 is fixedly mounted on the movable end of the first linear module 8 , and the moving direction of the movable end of the second linear module 9 is perpendicular to the axis of the fixed tube 201 ; The support base 10 is fixedly mounted on the movable end of the second linear module 9. The asphalt heating unit 11 and the boiling water heating unit 12 are fixedly mounted on the support base 10 in sequence along a moving direction parallel to the movable end of the second linear module 9. The asphalt heating unit 11 includes an asphalt measuring cylinder 1103, and the boiling water heating unit 12 includes a boiling water measuring cylinder 1201; The first linear module 8 drives the asphalt measuring cylinder 1103 and the boiling water measuring cylinder 1201 to move upward until the aggregate 15 extends into the asphalt measuring cylinder 1103 / the boiling water measuring cylinder 1201; Here, in this embodiment, the first linear module 8 is a screw module, and the second linear module 9 is also a screw module; Here, the diameters of the asphalt measuring cylinder 1103 and the boiling water measuring cylinder 1201 are smaller than the distance between two opposite side walls of the mounting groove 16; Here, the second linear module 9 drives the support base 10 to move left and right, thereby driving the asphalt measuring cylinder 1103 and the boiling water measuring cylinder 1201 to move left and right. The second linear module 9 is responsible for positioning the asphalt measuring cylinder 1103 or the boiling water measuring cylinder 1201 directly below the mounting groove 16. The first linear module 8 drives the second linear module 9 to move up and down, thereby driving the asphalt measuring cylinder 1103 and the boiling water measuring cylinder 1201 to move up and down. When the movable end of the first linear module 8 moves upward, the asphalt measuring cylinder 1103 or the boiling water measuring cylinder 1201 slides through the mounting groove 16. When the movable end of the first linear module 8 moves upward to the specified position, the aggregate 15 is completely immersed in the asphalt mixture in the asphalt measuring cylinder 1103 or the boiling water in the boiling water measuring cylinder 1201. Through this setting, the second linear module 9 switches the working positions of the asphalt measuring cylinder 1103 and the boiling water measuring cylinder 1201, and the first linear module 8 drives the aggregate 15 to be immersed in boiling water / asphalt or drives the aggregate 15 out of the immersion in boiling water / asphalt. Compared with the operation of manually transferring the aggregate 15 and moving the aggregate 15 up and down, the shaking of the aggregate 15 is reduced, and the possibility of the aggregate 15 spinning and shaking is further reduced.

[0028] In this embodiment, please refer to Figure 1 and 9 , the asphalt heating unit 11 and the boiling water heating unit 12 each include a heater 1101 and a measuring cylinder limiting ring 1102; The heater 1101 is fixedly mounted on the support base 10, and the measuring cylinder limiting ring 1102 is located above the heater 1101 and is fixedly mounted on the support base 10; The asphalt measuring cylinder 1103 passes through the measuring cylinder limiting ring 1102 of the asphalt heating unit 11 and is placed on the heater 1101 of the asphalt heating unit 11. The asphalt measuring cylinder 1103 stores asphalt mixture; The boiling water graduated cylinder 1201 passes through the graduated cylinder limiting ring 1102 of the boiling water heating unit 12 and is placed on the heater 1101 of the boiling water heating unit 12. Water is stored in the boiling water graduated cylinder 1201. Here, the heater 1101 of the asphalt heating unit 11 is used to heat the asphalt mixture in the asphalt measuring cylinder 1103. Heating the asphalt mixture can reduce the viscosity of the asphalt mixture and enhance its fluidity, thereby facilitating the subsequent coating of the aggregate 15 by the asphalt mixture. Here, the heater 1101 of the boiling water heating unit 12 is used to boil the water in the boiling water measuring cylinder 1201 , thereby providing a simulated environment for the high-temperature water flow impact between the asphalt mixture and the aggregate 15 .

[0029] In this embodiment, please refer to Figure 2 and 10, the experimental device further includes a baffle unit 13, the baffle unit 13 includes a baffle bracket 1301, a second linear power source 1302, and a baffle 1303; The second linear power source 1302 is fixedly mounted on the experimental bench 1 , and the extension direction of the movable end of the second linear power source 1302 is perpendicular to the axis of the fixed tube 201 ; Here, the form of the second linear power source 1302 is not limited, and can be a linear cylinder or an electric push rod. In this embodiment, the second linear power source 1302 is a linear cylinder. The baffle bracket 1301 is fixedly mounted on the movable end of the second linear power source 1302; The baffle 1303 is rotatably mounted on the baffle bracket 1301 , and the rotation axis of the baffle 1303 is perpendicular to the axis of the fixed tube 201 ; When the movable end of the second linear power source 1302 is extended to the farthest position, the baffle 1303 is located directly below the mounting groove 16; Here, the baffle unit 13 further includes a second rotational power source. In this embodiment, the second rotational power source is a motor. The second rotational power source is fixedly mounted on the baffle bracket 1301. The output end of the second rotational power source passes through the baffle bracket 1301 and is fixedly connected to the baffle 1303. Here, when the aggregate 15 is separated from the asphalt mixture and the through-beam sensor 6 does not detect any asphalt dripping, the lower end surface of the baffle 1303 is perpendicular to the axis of the fixed pipe 201, and the second linear power source 1302 drives the baffle 1303 to move linearly to just below the mounting groove 16 to catch any asphalt mixture that may fall until the asphalt mixture wrapped around the surface of the aggregate 15 is completely cooled; This arrangement can prevent the asphalt mixture on the aggregate 15 from dripping and contaminating the equipment when switching workstations.

[0030] Here, the experimental device further includes a scraper unit 14, which includes a third linear power source 1401, a fourth linear power source 1402, a connecting plate 1404, a scraper 1405, a nozzle 1406, an isolation liquid channel, a water pump and a water tank; The third linear power source 1401 is fixedly mounted on the experimental bench 1 , and the extension direction of the movable end of the third linear power source 1401 is perpendicular to the extension direction of the second linear power source 1302 ; The fourth linear power source 1402 is fixedly mounted on the movable end of the third linear power source 1401. The moving direction of the movable end of the fourth linear power source 1402 intersects with the extension and contraction direction of the second linear power source 1302. The movable end of the fourth linear power source 1402 slides obliquely downward. Here, the form of the third linear power source 1401 is not limited, and can be a linear cylinder or an electric push rod; in this embodiment, the third linear power source 1401 is a linear cylinder; Here, the form of the fourth linear power source 1402 is not limited, and can be a linear cylinder or an electric push rod; in this embodiment, the fourth linear power source 1402 is a linear cylinder; The connecting plate 1404 is fixedly mounted on the movable end of the fourth linear power source 1402; The scraper 1405 is fixedly mounted on the connecting plate 1404; The nozzle 1406 is fixedly mounted on the connecting plate 1404; The side wall of the connecting plate 1404 is provided with an isolation liquid channel connected to the nozzle 1406; One end of the isolation liquid channel is connected to the nozzle 1406, and the other end of the isolation liquid channel is connected to the water outlet of the water pump; The water inlet of the water pump is connected to the water tank, and the water tank is filled with isolation liquid; Here, the isolation liquid can be an emulsifier-based isolation liquid or a plant oil-based isolation liquid. First, the isolation liquid can significantly reduce the adhesion between the asphalt and the surface of the baffle 1303. After being evenly sprayed on the baffle 1303 by the nozzle 1406, it can form a lubricating isolation layer, preventing the asphalt from tightly adhering to the baffle 1303 after solidification, greatly reducing the difficulty and time consumption of manual cleaning. Second, the isolation liquid has the ability to dissolve or dilute the asphalt. When working in conjunction with the scraper 1405, it makes it easier for the scraper 1405 to scrape it off, while preventing the asphalt from accumulating at the edge of the scraper 1405 and affecting the cleaning effect. Here, when the baffle 1303 is retracted to the initial position under the drive of the second linear power source 1302, the baffle 1303 is rotated under the drive of the second rotational power source until the upper end surface of the baffle 1303 is parallel to the moving direction of the movable end of the fourth linear power source 1402, and the third linear power source 1401 drives the fourth linear power source 1402 to descend until the scraper 1405 contacts the upper end surface of the baffle 1303. At this time, the fourth linear power source 1402 drives the scraper 1405 to move to remove the asphalt dripping from the baffle 1303. While the fourth linear power source 1402 drives the scraper 1405, the water pump transmits the isolation liquid in the water tank to the nozzle 1406 through the isolation liquid channel, and the nozzle 1406 then sprays the isolation liquid on the baffle 1303; the baffle 1303 tilts downward, driving the isolation liquid and asphalt mixture on the baffle 1303 to flow into the waste box; Through this setting, the solidified asphalt mixture on the baffle 1303 can be automatically cleaned, which is convenient for the experimenters to use and further improves the automation process of the experimental device.

[0031] In summary, the present invention applies a fixed tube 201, at least three thin ropes 202 and a circular top piece 301. The aggregate 15 is suspended directly below the fixed tube 201 by at least three thin ropes 202. During the descending process of the circular top piece 301, the thin ropes 202 opposite to the semicircular groove will gradually enter the semicircular groove and contact the semicircular groove, and then the circular top piece 301 is used to limit the movement of the thin ropes 202 suspended on the aggregate 15, thereby solving the problem that the aggregate 15 is prone to shaking and rotating during the experiment, affecting the adhesion performance test results of the asphalt mixture.

[0032] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. An asphalt mixture performance test device, characterized in that: The experimental device includes: Experimental bench; Several rope fixing units, each of which is arranged on a test bench, each of which comprises a fixing tube and at least three thin ropes. The fixing tube is mounted on the test bench, one end of each thin rope is mounted on the outer wall of the fixing tube at an equal angle with the axis of the fixing tube as the centerline, and the other end of each thin rope is tied to the aggregate; The tensioning unit includes a plurality of circular top plates, and the plurality of circular top plates correspond one-to-one to a plurality of fixed tubes. The circular top plates are lifted and installed on the experimental bench, and the lifting axis of the circular top plate coincides with the axis of the fixed tube. The circular top plate is located directly above the aggregate, and the diameter of the circular top plate is smaller than the inner diameter of the fixed tube. At least three semicircular grooves are provided on the upper end surface of the circular top plate, and the semicircular grooves are connected to the side walls of the circular top plate. The semicircular grooves correspond one-to-one to the thin ropes, and the axis of the thin rope, the axis of the semicircular grooves and the axis of the fixed tube are located in the same plane.

2. The asphalt mixture performance test device according to claim 1, characterized in that: The rope fixing unit further comprises at least three adjustment modules for adjusting the length of the thin rope, and the adjustment modules correspond to the thin ropes one by one; The adjustment module includes a first pressing plate and a second pressing plate; The first pressing plate is fixedly mounted on the outer wall of the fixed tube; The second pressing plate is rotatably mounted on the first pressing plate, and the first pressing plate and the second pressing plate are interlocked and clamp the string between the first pressing plate and the second pressing plate.

3. The asphalt mixture performance test device according to claim 2, characterized in that: The rope fixing unit further comprises a plurality of positioning modules, wherein the positioning modules correspond one to one with the thin ropes; The positioning unit includes a U-shaped block, a light bulb, a power supply box and an electrode sheet; The U-shaped block includes a first horizontal end, a second horizontal end, and a vertical end; the first horizontal end of the U-shaped block is rotatably mounted on the side wall of the fixed tube; The negative electrode sheet is fixedly mounted on the end portion of the second horizontal end of the U-shaped block. When the negative electrode sheet contacts the string, the center line of the U-shaped block, the axis of the string, the axis of the semicircular groove, and the axis of the fixing tube are located in the same plane. The power box is fixedly mounted on the U-shaped block, a positive wire is led out from one end of the power box, the positive wire is electrically connected to the first pressure plate, and a negative wire is led out from the other end of the power box, the negative wire is electrically connected to the negative electrode sheet; The light bulb is connected in series to the positive wire / negative wire; The string is made of conductive material; The first pressing plate is made of conductive material.

4. The asphalt mixture performance test device according to claim 1, characterized in that: The tensioning unit further includes a first linear power source and a plurality of connecting columns; The first linear power source is fixedly mounted on the experimental bench, and the extension direction of the movable end of the first linear power source is parallel to the axis of the fixed tube; The plurality of connecting columns are fixedly connected to the telescopic end of the first linear power source, the plurality of connecting columns correspond one to one with the plurality of fixed tubes, and the axis of the connecting column coincides with the axis of the fixed tube; The circular top sheets correspond to the connecting posts one by one, and the circular top sheets are fixedly mounted on the ends of the connecting posts.

5. The asphalt mixture performance test device according to claim 4, characterized in that: The experimental device further includes a rotating unit, which includes a connecting block, a first rotating disk, a second rotating disk, a fixing bracket, a transmission slot and a transmission column; The connecting block is fixedly mounted on the movable end of the first linear power source, and the plurality of connecting columns are fixedly mounted on the connecting block; Several circular top sheets are located below the connecting block; The first rotating disk is rotatably mounted on the lower end surface of the connecting block, and the rotation axis of the first rotating disk is parallel to the axis of the fixed pipe; The fixed bracket is fixedly installed on the experimental bench; The second rotating disk is located below the first rotating disk, and the second rotating disk is rotatably mounted on a fixed bracket, and the rotation axis of the second rotating disk coincides with the rotation axis of the first rotating disk; A rectangular transmission groove is formed through the upper end surface of the second rotating disk; The transmission post cooperates with the transmission slot, one end of the transmission post is fixedly mounted on the first rotating disk, and the other end of the transmission post slides through the transmission slot; The plurality of fixed tubes are detachably mounted on the second rotating disk, and the plurality of fixed tubes are arranged in a circular array with the rotating axis of the second rotating disk as the center line.

6. The asphalt mixture performance test device according to claim 1, characterized in that: The experimental device also includes a distance measuring sensor; The distance sensor is fixedly mounted on the circular top sheet, the axis of the distance sensor coincides with the axis of the circular top sheet, and the measuring end of the distance sensor is mounted downward to measure the distance between the circular top sheet and the aggregate.

7. The asphalt mixture performance test device according to claim 1, characterized in that: The experimental device also includes a through-beam sensor and a sensor bracket; The sensor bracket is fixedly mounted on the experimental bench, and the sensor bracket is located below the aggregate; The middle of the sensor bracket is provided with a mounting slot, which is located directly below the aggregate, and the distance between the opposite side walls of the mounting slot is greater than the distance between the two farthest aggregates. The through-beam sensor is fixedly mounted on two opposite side walls of the mounting groove.

8. The asphalt mixture performance test device according to claim 1, characterized in that: The experimental device also includes a first linear module, a second linear module, a support base, an asphalt heating unit and a boiling water heating unit; The first linear module is fixedly mounted on the experimental bench, and the moving direction of the movable end of the first linear module is parallel to the axis of the fixed tube; The second linear module is fixedly mounted on the movable end of the first linear module, and the moving direction of the movable end of the second linear module is perpendicular to the axis of the fixed tube; The support base is fixedly mounted on the movable end of the second linear module, and the asphalt heating unit and the boiling water heating unit are fixedly mounted on the support base in sequence along a moving direction parallel to the movable end of the second linear module; The asphalt heating unit includes an asphalt graduated cylinder, and the boiling water heating unit includes a boiling water graduated cylinder; The first linear module drives the asphalt measuring cylinder and the boiling water measuring cylinder to move upward until the aggregate extends into the asphalt measuring cylinder / boiling water measuring cylinder.

9. The asphalt mixture performance test device according to claim 8, characterized in that: The asphalt heating unit and the boiling water heating unit both include a heater and a measuring cylinder limiting ring; The heater is fixedly mounted on the support base, and the measuring cylinder limiting ring is located above the heater and fixedly mounted on the support base; The asphalt measuring cylinder passes through the measuring cylinder limiting ring of the asphalt heating unit and is placed on the heater of the asphalt heating unit, and the asphalt measuring cylinder stores the asphalt mixture; The boiling water graduated cylinder passes through the graduated cylinder limiting ring of the boiling water heating unit and is placed on the heater of the boiling water heating unit. Water is stored in the boiling water graduated cylinder.

10. The asphalt mixture performance test device according to claim 7, characterized in that: The experimental device further includes a baffle unit, which includes a baffle bracket, a second linear power source, and a baffle; The second linear power source is fixedly mounted on the experimental bench, and the extension direction of the movable end of the second linear power source is perpendicular to the axis of the fixed tube; The baffle bracket is fixedly mounted on the movable end of the second linear power source; The baffle is rotatably mounted on the baffle bracket, and the rotation axis of the baffle is perpendicular to the axis of the fixed pipe; When the movable end of the second linear power source is extended to the farthest position, the baffle is located directly below the mounting groove.

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