An asphalt softening point testing device and method

Abstract

The present application belongs to the technical field of road engineering asphalt material performance test equipment, and particularly relates to a kind of asphalt softening point testing device and method.The present application includes container body, heating part and test mold carrier;The container body is a double-layer structure composed of container outer cylinder and container inner cylinder and has an open top;The heating part is evenly connected in the space between the container outer cylinder and the container inner cylinder;The test mold carrier is placed in the container body, and its top end is connected to the top of the container body.The raw materials of the present application are easy to obtain, low in cost, simple to use, can significantly reduce the workload of test personnel, improve the accuracy of test, and have significant economic and social benefits.The present application can effectively improve the accuracy of asphalt softening point test, reduce the risk of test, effectively improve the convenience and safety of test, and prevent personnel from being scalded.The design of adding a controller enhances the automation degree of the test.

Description

Technical Field

[0001] This invention belongs to the technical field of testing equipment for the performance of asphalt materials in road engineering, and specifically relates to an asphalt softening point testing device and method. Background Technology

[0002] In recent years, with the rapid growth of my country's economy, the pressure on road transportation has been increasing. The decline in transportation efficiency means an increase in transportation costs, resulting in wasted time and higher transportation costs. At the same time, road surface defects affect the service level and service life of roads and also pose potential safety hazards. Therefore, in order to meet the rapidly growing traffic demands, it is essential to conduct performance tests on highway asphalt.

[0003] Currently, in the early stages of road construction, based on on-site surveys, data collection, and interior design, a suitable type of asphalt is selected. Before its application on the road, the asphalt's performance needs to be tested in the laboratory to determine its various properties. Among these, the asphalt softening point test is a very important performance indicator. The softening point is determined by pouring molten asphalt into a ring of a specified size, scraping off the excess portion, placing a steel ball of a specified mass on the scraped sample, and then placing it in a container filled with water at 5°C for at least 15 minutes. Then, the water is heated at a rate of 5°C / min. The asphalt will slowly soften, and the steel ball will slowly pass through the asphalt sample and gradually sink. The water temperature at which the steel ball just touches the bottom plate at a specified distance is the softening point of the asphalt.

[0004] The current asphalt softening point tester has the following problems when conducting experiments:

[0005] (1) The asphalt softens when heated and sinks in the solution. This is done by manually observing and measuring the instantaneous temperature of the asphalt when it leaves the mold. This has a large error and affects the accuracy of the test.

[0006] (2) The initial heating rate is high, and the temperature is concentrated at the bottom of the test glass, which causes the lower test solution to be heated first. The temperature is uneven, making it difficult to control the heating rate and resulting in errors in the test results.

[0007] (3) There is no horizontal indicator on the softening point ring mold mount. When the mount is installed on the glass container during the test, it can only be roughly observed by human observation and cannot be accurately controlled to ensure its horizontal balance. This results in different asphalt loosening times in the two softening point molds of the same test, affecting the accuracy of the experiment.

[0008] (4) The sample cup, the lower heating integrated control console and the softening point ring mold mount are separate modules, which makes the test more complicated. Summary of the Invention

[0009] This invention provides an apparatus and method for testing the softening point of asphalt. One objective is to provide an apparatus and method that can improve the accuracy of asphalt softening point testing and reduce deviations in test conclusions caused by objective conditions. Another objective is to provide an apparatus and method that can improve work efficiency.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] An asphalt softening point testing device, comprising:

[0012] The container body is a double-layered structure consisting of an outer container cylinder and an inner container cylinder, with an open top.

[0013] The heating element is evenly connected in the space between the outer cylinder and the inner cylinder of the container.

[0014] The trial mold carrier is placed inside the container body, and its top is connected to the top of the container body.

[0015] It also includes a controller; the controller is electrically connected to the heating unit and the mold mounter respectively.

[0016] A micro printer for data output is connected within the space formed between the inner and outer cylinders at the bottom of the container body; the micro printer is electrically connected to the controller; and a paper output hole for printing data paper is opened on the outer wall of the container body corresponding to the micro printer.

[0017] The container body has a manual observation window on its side wall; an annular groove for attaching the test mold carrier is formed on the top surface of the container body; a liquid injection port is formed on the upper part of the side wall of the container body, and a liquid injection pipeline is connected to the liquid injection port; a drain hole is formed on the lower side wall of the inner cylinder of the container body, and the drain hole extends to the outside of the side wall of the outer cylinder of the container; a preset heating temperature display screen, a rate display screen, a real-time temperature display screen, and a softening point display screen are provided on the side wall of the container body; a heating button and a cooling button for adjusting the heating temperature are connected to the side wall of the container body, and a main switch for turning on the instrument power is connected to the main switch. The main power cord passes through the bottom side wall of the container body and enters the bottom of the space formed between the inner cylinder and the outer cylinder of the container; the heating button and the cooling button are electrically connected to the heating element and electrically connected to the controller.

[0018] The heating element is a heating wire; the heating wire is evenly distributed in the space between the inner cylinder and the outer cylinder of the container.

[0019] The mold mounting device includes a mounting tray, two mold lifting and mounting channels, a mold lifting and transmission mechanism, a mounting frame, and a connecting plate. The shape of the mounting tray matches the shape of the container body, and two through holes are symmetrically opened on its surface. The outer edge of the mounting tray is connected to the top of the container body. The connecting plate is placed horizontally inside the container body and is spaced from the inner bottom surface of the container body. The mold lifting and transmission mechanism and the two mold lifting and mounting channels are vertically connected between the mounting tray and the connecting plate. The top ends of the two mold lifting and mounting channels are respectively connected to the two through holes on the surface of the mounting tray, and their bottom ends are connected to the connecting plate. The two mold lifting and mounting channels are symmetrically arranged on both sides of the mold lifting and transmission mechanism. Each mold lifting and mounting channel is provided with a mounting frame for placing a circular mold. Each mounting frame is connected to the mold lifting and transmission mechanism. Under the drive of the mold lifting and transmission mechanism, the two mounting frames rise and fall simultaneously in the two mold lifting and mounting channels. The top of the mold lifting and transmission mechanism is connected to the lower surface of the mounting tray, and its bottom is connected to the connecting plate.

[0020] Each of the aforementioned mold lifting and mounting channels is a cylindrical structure made of transparent material with open ends, and its side walls have strip-shaped mold slides for the mounting frame to move up and down; the mold slides are set directly opposite the mold lifting and transmission mechanism.

[0021] The upper surface of the mounting tray is connected to a horizontal balance indicator for determining the horizontal state of the mounting tray; two guide rods are connected to the lower surface of the mounting tray, with a gap between the bottom end of the guide rod and the inner bottom surface of the container body; a gravity sensor is connected to the bottom end of each guide rod; an external thermometer is also vertically connected to the mounting tray; an up button and a down button are provided on the side wall of the mounting tray; the up button and the down button are respectively connected to the mold lifting and transmission mechanism for controlling the lifting and lowering of the mounting frame by the mold lifting and transmission mechanism; the gravity sensor is electrically connected to the controller.

[0022] The mold-testing lifting and transmission mechanism includes a ring-shaped conveyor belt, rectangular gears on the belt, separating fixing bolts, a power cable inside the cup wall, and a motor. The rectangular gears are arranged in four sets of two, with two sets of gears spaced apart and symmetrically connected to the lower surface of the mounting plate, and the other two sets of gears spaced apart and symmetrically connected to the upper surface of the connecting plate. The two sets of rectangular gears connected to the mounting plate and the two sets of gears connected to the connecting plate correspond vertically. Two motors are provided, fixedly connected to the middle of the inner wall of the container body. The output shafts of the two motors are respectively connected to both ends of the separating fixing bolts, driving the rotation of the separating fixing bolts when the two motors rotate synchronously. The separating fixing bolts are placed at the intersection of the conveyor belts in the middle to separate the conveyor belts at the intersection. The conveyor belt is connected to the four sets of rectangular gears and the separating fixing bolts. The two motors are connected to the power cable located inside the cup wall.

[0023] A testing method for an asphalt softening point testing device includes the following steps.

[0024] Step 1: Pour molten asphalt into a ring mold and cure at room temperature for the preset time until it solidifies;

[0025] Step 2: Inject the test medium into the container body;

[0026] Step 3: Place the ring mold on the mounting frame in the mold tester, and place the test steel balls on the ring mold;

[0027] Step 4: Activate the mold lifting and transmission mechanism in the mold carrier to transport the ring mold containing steel balls to the bottom of the container body;

[0028] Step 5: Activate the heating unit, which will uniformly heat the container body.

[0029] Step 6: Record and display the instant the steel ball falls out of the ring mold;

[0030] Step 7: Remove the ring mold, clean the residual asphalt, open the drain hole to drain the test solution, turn on the heating to dry, and the experiment is complete. Seal the equipment.

[0031] Beneficial effects:

[0032] (1) The present invention is organically composed of a container body, a heating part and a test mold carrier. The raw materials of the present invention are readily available, low in cost and simple to use. It can significantly reduce the workload of test personnel, improve the accuracy of the test, and has significant economic and social benefits.

[0033] (2) The present invention can effectively improve the accuracy of the softening point test of old asphalt, reduce the test risk, effectively improve the convenience and safety of the test, and prevent personnel from being burned.

[0034] (3) The present invention enhances the automation of the experiment by adding a controller.

[0035] (4) The setting of the horizontal balance indicator in this invention enables timely control of the balance of the ring mold and increases the accuracy of the test.

[0036] (5) The integrated design of this invention integrates the whole equipment, eliminating the need for pre-test installation and assembly processes, resulting in a higher degree of automation and reducing the workload of test personnel.

[0037] (6) The heating wires in this invention are evenly distributed around the container body, so the solution temperature rises more evenly. This avoids the problem of uneven temperature between the upper and lower parts of the solution (water, glycerin), resulting in temperature difference, and the upper and lower parts of the solution convection exchange causing stress on the sample asphalt, which affects the accuracy of the test.

[0038] (7) The present invention adds a gravity sensor so that when the sample asphalt falls due to heat, the instantaneous temperature can be automatically located according to the sensor, and the experimental results are more accurate than manual observation.

[0039] (8) The present invention provides a solution drain hole on the side wall of the container body, which not only simplifies the device installation process and makes it easy to store, but also reduces the risk of burns caused by personnel touching the heated container body.

[0040] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a front view of the prototype mount of the present invention.

[0043] Figure 2 This is a schematic diagram showing the connection between the mold lifting and mounting channel and the mold lifting and transmission mechanism in this invention.

[0044] Figure 3 for Figure 2 sectional view of aa.

[0045] Figure 4 This is a partial enlarged view of the trial mold lifting and transmission mechanism in this invention.

[0046] Figure 5 This is a schematic diagram of the lifting and mounting channel structure for the prototype mold in this invention.

[0047] Figure 6 This is a schematic diagram of the structure of the container body in this invention.

[0048] Figure 7 This is a schematic diagram of the overall structure of the present invention.

[0049] Figure 8 This is a schematic diagram of the arrangement of the heating wires in this invention.

[0050] In the diagram: 1. Heating wire; 2. Liquid injection line; 3. Heating button; 4. Cooling button; 5. Paper outlet; 6. Main switch; 7. Preset heating temperature display; 8. Rate display; 9. Real-time temperature display; 10. Softening point display; 11. Drain hole; 12. Manual observation window; 13. Test progress indicator; 14. Mounting frame; 15. Horizontal balance indicator; 16. Mold lifting and transfer mechanism; 17. Mold lifting and mounting channel; 18. Up button; 9. Lowering key; 20. Gravity sensor; 21. Conductor rod; 22. External thermometer; 23. Conveyor track; 24. Track rectangular gear; 25. Separator fixing bolt; 26. Track conveying direction; 27. Power cord; 28. Motor; 29. ​​Trial mold slide; 30. Outer cylinder of container; 31. Inner cylinder of container; 32. Output shaft; 33. Trial mold mount; 34. Container body; 35. Main power cord; 36. Groove; 37. Mounting plate; 38. Connecting plate. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] according to Figures 1-8 The device shown is an asphalt softening point testing device, comprising:

[0054] The container body 34 is a double-layer structure consisting of an outer container cylinder 30 and an inner container cylinder 31, with an open top.

[0055] The heating element is uniformly connected in the space between the outer cylinder 30 and the inner cylinder 31 of the container.

[0056] The trial mold mount 33 is placed inside the container body 34, and its top end is connected to the top of the container body 34.

[0057] In practical use, molten asphalt is first injected into the ring mold and cured at room temperature for a preset time until it solidifies; the preset time is generally 30 minutes. Then, the ring mold is placed on the mold carrier 33, and the test steel ball is placed on the ring mold. Next, the test medium is injected into the container body 34. Then, the mold carrier 33 is activated, transporting the ring mold with the steel ball to the bottom of the container body 34. The heating unit is then activated, uniformly heating the container body 34. After heating for a period of time, the steel ball falls out of the ring mold, and the instantaneous temperature upon exiting the ring mold is recorded. Subsequently, the ring mold is removed, residual asphalt is cleaned, the test solution in the container body 34 is drained, and heating and drying are initiated to complete the experiment. The equipment is then sealed.

[0058] This invention is simple to use, significantly reduces the workload of testing personnel, improves the accuracy of testing, and has significant economic and social benefits. This invention can effectively improve the accuracy of old asphalt softening point testing, reduce testing risks, effectively improve the convenience and safety of testing, and effectively prevent personnel burns.

[0059] Example 2:

[0060] according to Figures 1-8 The asphalt softening point testing device shown differs from Embodiment 1 in that it also includes a controller; the controller is electrically connected to the heating unit and the mold mount 33 respectively.

[0061] In practical use, the design of this controller enhances the degree of automation in the experiment.

[0062] Example 3:

[0063] according to Figure 6 and Figure 7 The asphalt softening point testing device shown differs from Embodiment 2 in that: a micro printer for data output is connected in the space formed between the bottom inner cylinder 31 and the outer cylinder 30 of the container body 34; the micro printer is electrically connected to the controller; and a paper output hole 5 for printing data paper is opened on the outer wall of the container body 34 corresponding to the micro printer.

[0064] In practical use, the design of the miniature printer facilitates the timely acquisition of experimental data and makes archiving convenient.

[0065] Example 4:

[0066] according to Figures 6-8 The asphalt softening point testing device shown differs from Embodiment 1 or Embodiment 2 in that: a manual observation window 12 is provided on the side wall of the container body 34; an annular groove 36 for attaching the test mold mount 33 is opened on the top surface of the container body 34; a liquid injection port is opened on the upper part of the side wall of the container body 34, and a liquid injection pipeline 2 is connected to the liquid injection port; a drain hole 11 is opened on the lower side wall of the inner cylinder 31 of the container body 34, and the drain hole 11 extends to the outside of the side wall of the outer cylinder 30 of the container; and a display for the preset heating is provided on the side wall of the container body 34. The container body 34 is equipped with a preset heating temperature display 7, a rate display 8, a real-time temperature display 9, and a softening point display 10. The side wall of the container body 34 is connected to a heating button 3 and a cooling button 4 for adjusting the heating temperature, and a main switch 6 for turning on the instrument power. The main switch 6 is connected to a main power cord 35, which passes through the bottom side wall of the container body 34 and enters the bottom of the space formed between the inner cylinder 31 and the outer cylinder 30 of the container. The heating button 3 and the cooling button 4 are electrically connected to the heating element and electrically connected to the controller.

[0067] In practical use, the annular groove 36 design makes the connection of the overlapping mold mount 33 more convenient and stable; the injection port design facilitates the injection of the test medium; and the drain hole 11 design facilitates the emptying of the test medium from the container body 34 after the test, preventing burns to operators. The inclusion of a heating temperature display screen 7, a rate display screen 8, a real-time temperature display screen 9, and a softening point display screen 10 allows for convenient and intuitive understanding of various parameters during the experiment, enabling timely monitoring of the experimental status. The heating button 3 and cooling button 4 facilitate temperature adjustment, ensuring that the temperature always meets requirements during the experiment and guaranteeing the accuracy of the test data.

[0068] The manual observation window 12 allows for a direct understanding of the test status within the container body 34.

[0069] In practical applications, in order to intuitively understand the real-time status of the test, a test progress indicator light 13 is also connected to the container body 34 to display the normal, fault, and completion status of the sample.

[0070] Example 5:

[0071] according to Figure 8 The asphalt softening point testing device shown differs from Embodiment 1 or Embodiment 4 in that: the heating part is a heating wire 1; the heating wire 1 is evenly arranged in the space between the inner cylinder 31 and the outer cylinder 30 of the container.

[0072] In practical use, the heating part adopts the technical solution of heating wire 1, which not only ensures that its function is achieved, but also makes the materials readily available and reduces costs.

[0073] The heating wire 1 is evenly distributed in the space between the inner cylinder 31 and the outer cylinder 30 of the container, which makes the heating more uniform and the experimental data more accurate.

[0074] Example 6:

[0075] according to Figures 1-5 The asphalt softening point testing device shown differs from Embodiment 1 or Embodiment 2 in that: the mold mount 33 includes a mounting plate 37, two mold lifting and mounting channels 17, a mold lifting and transmission mechanism 16, a mounting frame 14, and a connecting plate 38; the shape of the mounting plate 37 matches the shape of the container body 34, and two through holes are symmetrically opened on its surface; the outer edge of the mounting plate 37 is connected to the top of the container body 34; the connecting plate 38 is horizontally placed inside the container body 34 and has a gap from the inner bottom surface of the container body 34; the mold lifting and transmission mechanism 16 and the two mold lifting and mounting channels 17 are vertically connected to the mounting plate 37 and the connecting plate 38. Between; the top ends of the two test mold lifting and mounting channels 17 are respectively connected to two through holes on the surface of the mounting plate 37, and their bottom ends are connected to the connecting plate 38; the two test mold lifting and mounting channels 17 are symmetrically arranged on both sides of the test mold lifting and transmission mechanism 16; each test mold lifting and mounting channel 17 is provided with a mounting rack 14 for placing a circular test mold, and each mounting rack 14 is connected to the test mold lifting and transmission mechanism 16. Under the drive of the test mold lifting and transmission mechanism 16, the two mounting racks 14 rise and fall together in the two test mold lifting and mounting channels 17; the top of the test mold lifting and transmission mechanism 16 is connected to the lower surface of the mounting plate 37, and its bottom is connected to the connecting plate 38.

[0076] In practical use, molten asphalt is first injected into the ring mold and cured at room temperature for a preset time until it solidifies; the preset time is generally 30 minutes. Then, steel balls are placed on the ring mold and placed on the mounting frame 14. The mold lifting and transmission mechanism 16 is activated, moving the mounting frame 14 downwards within the two mold lifting and mounting channels 17. When the ring mold on the mounting frame 14 reaches the preset position, the mold lifting and transmission mechanism 16 stops and the heating unit is activated to uniformly heat the test medium until the steel balls detach from the ring mold. The temperature at the moment of detachment is recorded, and the heating unit is turned off to complete the test. After the test, the mold lifting and transmission mechanism 16 is activated again, causing the mounting frame 14 to rise within the mold lifting and mounting channels 17. Once in position, the mold lifting and transmission mechanism 16 stops, the ring mold is removed, and any remaining asphalt is cleaned. Subsequently, the test medium is discharged, heated, dried, and sealed, laying a good foundation for subsequent tests.

[0077] In this embodiment, the mounting frame 14 is always kept horizontal to ensure the levelness after the ring mold is placed, thereby making the test results more accurate.

[0078] Example 7:

[0079] according to Figures 1-3 , Figure 5 The asphalt softening point testing device shown differs from Embodiment Six in that: each of the mold lifting and mounting channels 17 is a cylindrical structure made of transparent material with open ends, and its side wall has a strip mold slide 29 for the mounting frame 14 to move up and down; the mold slide 29 is set directly opposite the mold lifting and transmission mechanism 16.

[0080] In practical use, the trial mold lifting and mounting channel 17 adopts the above-mentioned technical solution, which facilitates the observation of the experimental status. The design of the strip-shaped trial mold slide 29 allows the mounting frame 14 to smoothly move up and down while carrying the ring mold.

[0081] Example 8:

[0082] according to Figure 1 and Figure 7 The asphalt softening point testing device shown differs from Embodiment Six in that: a horizontal balance indicator 15 for determining the horizontal state of the mounting plate 37 is connected to the upper surface of the mounting plate 37; two transmission rods 21 are connected to the lower surface of the mounting plate 37, with a gap between the bottom end of the transmission rods 21 and the inner bottom surface of the container body 34; a gravity sensor 20 is connected to the bottom end of each transmission rod 21; an external thermometer 22 is also vertically connected to the mounting plate 37; an up button 18 and a down button 19 are provided on the side wall of the mounting plate 37; the up button 18 and the down button 19 are respectively connected to the mold lifting and transmission mechanism 16, and are used to control the lifting and lowering of the mounting frame 14 by the mold lifting and transmission mechanism 16; the gravity sensor 20 is electrically connected to the controller.

[0083] In practical use, the horizontal balance indicator 15 ensures that the mounting frame 14 on the mold mount 33 remains horizontal during the test, ensuring the levelness of the ring mold after placement, thus making the test results more accurate. If the levelness of the mounting frame 14 is insufficient, the asphalt loosening time of the two ring molds in the same test will be different, affecting the accuracy of the experiment.

[0084] In this embodiment, the level balance indicator 15 is a bubble level, which not only achieves its function but also has low cost, occupies little space, and is easy to implement.

[0085] By using the gravity sensor 20, the instant when the steel balls fall off the two ring molds is captured, ensuring the accuracy of the experiment.

[0086] The use of the up key 18 and the down key 19 makes it easier to control the up and down movement of the mold lifting and transmission mechanism 16.

[0087] Example 9:

[0088] according to Figures 1-5 , Figure 7 The asphalt softening point testing device shown differs from Embodiment Six in that: the test mold lifting and transmission mechanism 16 includes a ring conveyor belt 23, track rectangular gears 24, separating fixing bolts 25, a power cable 27 inside the cup wall, and a motor 28; the track rectangular gears 24 are arranged in four sets, two in each set, with two sets of track rectangular gears 24 connected alternately and symmetrically to the lower bottom surface of the mounting plate 37, and the other two sets of track rectangular gears 24 connected alternately and symmetrically to the upper bottom surface of the connecting plate 38; the two sets of track rectangular gears 24 connected to the mounting plate 37 and the two sets of track rectangular gears 24 connected to the connecting plate 38 are... The rectangular gears 24 are arranged vertically and vertically; two motors 28 are provided, and the two motors 28 are fixedly connected to the middle of the inner side wall of the container body 34. The output shafts 32 of the two motors 28 are respectively connected to the two ends of the separating fixing bolts 25. When the two motors 28 rotate synchronously, they drive the rotation of the separating fixing bolts 25; the separating fixing bolts 25 are placed at the intersection of the conveyor belts 23 in the middle, and are used to separate the conveyor belts 23 at the intersection; the conveyor belts 23 are respectively connected to four sets of track rectangular gears 24 and separating fixing bolts 25; the two motors 28 are connected to the power line 27 set in the cup wall.

[0089] In actual use, the power to rotate the track 23 is provided by two motors 28.

[0090] A ring-shaped conveyor belt 23 is separated at the intersection of the belts by four sets of rectangular gears 24 and separating fixing bolts 25, ensuring that the two test molds in the lifting and mounting channel 17 move in the same direction (up and down) along the conveyor belt transfer direction 26. In order to make the rotation of the separating fixing bolts 25 have a better driving effect on the conveyor belt 23, the conveyor belt 23 in this embodiment is a gear belt, and a matching meshing structure is provided on the side wall of the separating fixing bolts 25.

[0091] Four sets of rectangular track gears 24 are used to change the direction of the tracks.

[0092] In this embodiment, the motor 28 can also be a single motor used to drive the rotation of the track.

[0093] The separator fixing bolt 25 also serves to fix the center of the track.

[0094] Example 10:

[0095] Reference Figures 1-8 A testing method for an asphalt softening point testing device includes the following steps.

[0096] Step 1: Pour molten asphalt into a ring mold and cure at room temperature for the preset time until it solidifies;

[0097] Step 2: Inject the test medium into the container body 34;

[0098] Step 3: Place the ring mold on the mounting frame 14 in the test mold holder 33, and place the test steel ball on the ring mold;

[0099] Step 4: Activate the mold lifting and transmission mechanism 16 in the mold carrier 33 to transport the ring mold containing steel balls to the bottom of the container body 34.

[0100] Step 5: Activate the heating unit, which will uniformly heat the container body 34.

[0101] Step 6: Record and display the instant the steel ball falls out of the ring mold;

[0102] Step 7: Remove the ring mold, clean the residual asphalt, open the drain hole 11 to drain the test solution, turn on the heating and drying to complete the experiment, and seal the equipment.

[0103] The raw materials of this invention are readily available, low in cost, and simple to use. They can significantly reduce the workload of test personnel, improve the accuracy of tests, and have significant economic and social benefits.

[0104] This invention can effectively improve the accuracy of the softening point test of old asphalt, reduce the test risk, effectively improve the convenience and safety of the test, and prevent personnel from being burned.

[0105] This invention enhances the automation of the experiment by adding a controller.

[0106] The horizontal balance indicator in this invention allows for timely control of the balance of the ring mold, increasing the accuracy of the experiment.

[0107] The integrated design of this invention combines the entire equipment, eliminating the need for pre-test installation and assembly processes, resulting in a higher degree of automation and reducing the workload of test personnel.

[0108] In this invention, the heating wires are evenly distributed around the container body, resulting in a more uniform rise in solution temperature. This avoids the problem of uneven temperature distribution in the solution (water, glycerin) causing temperature differences and resulting in stress on the sample asphalt due to convection and exchange of solutions, which could affect the accuracy of the test.

[0109] The invention incorporates a gravity sensor, which automatically determines the instantaneous temperature of the asphalt sample as it falls due to heat, resulting in more accurate experimental results than manual observation.

[0110] The present invention provides a solution drainage hole on the side wall of the container body, which not only simplifies the device installation process and facilitates storage, but also reduces the risk of burns caused by personnel touching the heated container body.

[0111] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0112] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0113] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0114] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A device for testing the softening point of asphalt, characterized in that: include The container body (34) is a double-layer structure consisting of an outer container cylinder (30) and an inner container cylinder (31) with an open top. The heating element is uniformly connected in the space between the outer cylinder (30) and the inner cylinder (31) of the container; The trial mold mount (33) is placed inside the container body (34), and its top end is connected to the top of the container body (34); The mold mounting device (33) includes a mounting plate (37), two mold lifting mounting channels (17), a mold lifting transmission mechanism (16), a mounting frame (14), and a connecting plate (38); the shape of the mounting plate (37) matches the shape of the container body (34), and two through holes are symmetrically opened on its plate surface; the outer edge of the mounting plate (37) is connected to the top of the container body (34); the connecting plate (38) is horizontally placed inside the container body (34) and has a gap with the inner bottom surface of the container body (34); the mold lifting transmission mechanism (16) and the two mold lifting mounting channels (17) are vertically connected between the mounting plate (37) and the connecting plate (38); the two mold lifting mounting channels (14) The top of 17) is connected to two through holes on the surface of the mounting plate (37), and its bottom is connected to the connecting plate (38); the two test mold lifting mounting channels (17) are symmetrically arranged on both sides of the test mold lifting transmission mechanism (16); each test mold lifting mounting channel (17) is provided with a mounting rack (14) for placing the ring test mold, and each mounting rack (14) is connected to the test mold lifting transmission mechanism (16). Under the drive of the test mold lifting transmission mechanism (16), the two mounting racks (14) rise and fall together in the two test mold lifting mounting channels (17); the top of the test mold lifting transmission mechanism (16) is connected to the lower surface of the mounting plate (37), and its bottom is connected to the connecting plate (38); Each of the aforementioned mold lifting and mounting channels (17) is a cylindrical structure with open ends made of transparent material, and its side walls have strip mold slide grooves (29) for the mounting frame (14) to move up and down; the mold slide grooves (29) are set directly opposite the mold lifting and transmission mechanism (16); The upper surface of the mounting tray (37) is connected to a horizontal balance indicator (15) for judging the horizontal state of the mounting tray (37); two transmission rods (21) are connected to the lower surface of the mounting tray (37), and there is a gap between the bottom end of the transmission rod (21) and the inner bottom surface of the container body (34); a gravity sensor (20) is connected to the bottom end of each transmission rod (21); an external thermometer (22) is also vertically connected to the mounting tray (37); an up button (18) and a down button (19) are provided on the side wall of the mounting tray (37); the up button (18) and the down button (19) are respectively connected to the mold lifting and transmission mechanism (16) for controlling the lifting and lowering of the mounting frame (14) by the mold lifting and transmission mechanism (16); the gravity sensor (20) is electrically connected to the controller.

2. The asphalt softening point testing device as described in claim 1, characterized in that: It also includes a controller; the controller is electrically connected to the heating part and the mold mount (33) respectively.

3. The asphalt softening point testing device as described in claim 2, characterized in that: A micro printer for data output is connected in the space formed between the bottom inner cylinder (31) and the outer cylinder (30) of the container body (34); the micro printer is electrically connected to the controller; and a paper output hole (5) for printing data paper is opened on the outer wall of the container body (34) corresponding to the micro printer.

4. The asphalt softening point testing device as described in claim 1 or 2, characterized in that: The container body (34) has an artificial observation window (12) on its side wall; the top surface of the container body (34) has an annular groove (36) for connecting the test mold mount (33); the upper part of the side wall of the container body (34) has a liquid injection port, and a liquid injection line (2) is connected to the liquid injection port; the lower side wall of the inner cylinder (31) of the container body (34) has a drain hole (11), which extends to the outside of the side wall of the outer cylinder (30); the side wall of the container body (34) is provided with a preset heating temperature, rate, real-time temperature, and softening point. Temperature display screen (7), rate display screen (8), real-time temperature display screen (9) and softening point display screen (10); the side wall of the container body (34) is connected to a heating key (3) and a cooling key (4) for adjusting the heating temperature, and a main switch (6) for turning on the instrument power. The main switch (6) is connected to a main power line (35). The main power line (35) passes through the bottom side wall of the container body (34) and enters the bottom of the space formed between the inner cylinder (31) and the outer cylinder (30) of the container. The heating key (3) and the cooling key (4) are electrically connected to the heating part and electrically connected to the controller.

5. The asphalt softening point testing device as described in claim 1, characterized in that: The heating element is a heating wire (1); the heating wire (1) is evenly arranged in the space between the inner cylinder (31) and the outer cylinder (30) of the container.

6. The asphalt softening point testing device as described in claim 1, characterized in that: The trial mold lifting and transmission mechanism (16) includes a ring conveyor belt (23), track rectangular gears (24), separating fixing bolts (25), power cord (27), and motor (28); the track rectangular gears (24) are arranged in four sets, two in each set, with two sets of track rectangular gears (24) connected alternately and symmetrically on the bottom surface of the mounting plate (37), and the other two sets of track rectangular gears (24) connected alternately and symmetrically on the top surface of the connecting plate (38); the two sets of track rectangular gears (24) connected on the mounting plate (37) and the two sets of track rectangular gears (24) connected on the connecting plate (38) are vertically aligned; the motor ( 28) Two motors (28) are fixedly connected to the middle of the inner wall of the container body (34). The output shafts (32) of the two motors (28) are respectively connected to the two ends of the separating fixing bolt (25). When the two motors (28) rotate synchronously, they drive the rotation of the separating fixing bolt (25). The separating fixing bolt (25) is placed at the intersection of the middle of the conveyor belt (23) for separating the conveyor belt (23) at the intersection. The conveyor belt (23) is connected to four sets of track rectangular gears (24) and the separating fixing bolt (25). The two motors (28) are connected to the power line (27) set in the cup wall.

7. A method for testing the softening point of asphalt, characterized in that: The asphalt softening point testing device as described in any one of claims 1-6 includes the following steps: Step 1: Pour molten asphalt into a ring mold and cure at room temperature for the preset time until it solidifies; Step 2: Inject the test medium into the container body (34); Step 3: Place the ring mold on the mounting frame (14) in the test mold mounter (33), and place the test steel ball on the ring mold; Step 4: Start the mold lifting and transmission mechanism (16) in the mold carrier (33) to transport the ring mold containing steel balls to the bottom of the container body (34); Step 5: Start the heating unit, which will uniformly heat the container body (34); Step 6: Record and display the instant the steel ball falls out of the ring mold; Step 7: Remove the ring mold, clean the residual asphalt, open the drain hole (11) to drain the test solution, turn on the heating and drying to complete the experiment, and seal the equipment.

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