Asphalt stability detection equipment

Abstract

The utility model belongs to the technical field of asphalt hardness detection, and particularly relates to asphalt stability detection equipment. Comprising a bottom shell on which an electric push rod is arranged; the cantilever is arranged on the electric push rod; the displacement sensor is arranged at the bottom of the cantilever; the needle is arranged at the bottom of the displacement sensor; the computer is connected with the displacement sensor through an electric wire; the heat preservation shell is arranged on the bottom shell; the inner shell is arranged in the heat preservation shell and used for being filled with asphalt; the heating unit and the cooling unit are arranged in the heat preservation shell and located outside the inner shell; the temperature sensor is used for monitoring the temperature change of the asphalt in real time, and the temperature sensor is electrically connected with the computer; wherein the heating unit and the cooling unit are used for simulating the real performance of asphalt in high-temperature and low-temperature environments, recording the temperature change of the asphalt in real time and providing more comprehensive performance data. The utility model provides asphalt stability detection equipment capable of testing and monitoring asphalt performance in real time under different temperature conditions.

Description

Technical Field

[0001] This utility model belongs to the field of asphalt hardness testing technology, and in particular relates to an asphalt stability testing device. Background Technology

[0002] Asphalt is a commonly used paving material in transportation infrastructure such as highways, airport runways, and parking lots. Its performance directly affects the durability, comfort, and safety of roads. The hardness of asphalt is one of its important performance indicators, usually assessed through a penetration test. The penetration test method is mainly used to evaluate the hardness of asphalt under standard conditions, and its test temperature is typically set at 25°C. This test method determines the hardness of the asphalt by measuring the depth to which a needle penetrates the asphalt sample under a specified load.

[0003] However, the penetration test method has certain limitations. First, the test temperature is only room temperature (25℃), so the results only reflect the hardness of asphalt at room temperature and cannot effectively evaluate the performance of asphalt under high or low temperature environments. Especially under high or low temperature conditions, the physical properties of asphalt will change significantly, which is crucial for actual road performance. For example, in the high temperatures of summer, asphalt may become too soft, leading to rutting; while in cold regions, low temperatures may cause asphalt to become brittle, increasing the risk of cracking. Therefore, a penetration test at room temperature alone cannot comprehensively evaluate the performance of asphalt under different environments.

[0004] Furthermore, existing penetration testing methods typically cannot monitor asphalt temperature changes in real time. In practical applications, asphalt temperature is significantly affected by the external environment, and temperature fluctuations directly impact its performance. Especially during road construction and use, asphalt temperature often varies considerably, requiring testing equipment capable of real-time monitoring and recording of asphalt performance changes under different temperature conditions. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing an asphalt stability testing device capable of testing and real-time monitoring of asphalt performance under different temperature conditions.

[0006] In view of this, the present invention provides an asphalt stability testing device, comprising:

[0007] The bottom shell contains an installation chamber.

[0008] A support plate is installed at the top of the bottom shell;

[0009] The mounting bracket is installed on the support plate by bolt connection;

[0010] Electric actuator, mounted on the mounting bracket;

[0011] The cantilever is mounted on the electric actuator.

[0012] Multiple displacement sensors are located at the bottom of the cantilever.

[0013] The needle is located at the bottom of the displacement sensor;

[0014] The computer is mounted on the bottom shell and is connected to the displacement sensor via wires.

[0015] An insulation shell is installed on the bottom shell, with one end of the insulation shell extending through and into the mounting cavity of the bottom shell;

[0016] The inner shell, located inside the insulation shell, is used to fill asphalt;

[0017] The heating unit is located inside the insulation shell and outside the inner shell, and is used to simulate the real performance of asphalt under high temperature environment;

[0018] The cooling unit is located inside the insulation shell and outside the inner shell, and is used to simulate the real performance of asphalt in a low-temperature environment.

[0019] A temperature sensor is installed on the outer wall of the insulation shell to monitor the temperature change of the asphalt in real time. The temperature sensor is electrically connected to the computer.

[0020] The heating and cooling units simulate the real performance of asphalt under high and low temperature environments and record the temperature changes of asphalt in real time, providing more comprehensive performance data.

[0021] In the above technical solution, the heating unit further includes heaters, there are two heaters, which are arranged on the front and rear sides inside the insulation shell and located on the outer wall of the inner shell.

[0022] In any of the above technical solutions, the cooling unit further includes:

[0023] The liquid storage tank is located on the left and right sides inside the installation chamber;

[0024] The water pump is located on the left and right sides of the bottom shell;

[0025] The outlet pipe is connected to the storage tank at one end and to the water pump at the other end.

[0026] Water delivery pipe, installed on the water pump;

[0027] Water-cooled pipes are installed on the left and right sides inside the insulation shell and on the outside of the inner shell. The lower end of the water-cooled pipe is connected to the liquid storage tank, and the upper end passes through the insulation shell and is connected to the water supply pipe.

[0028] In any of the above technical solutions, the water cooling pipe is further provided as an extension of a copper bend.

[0029] In any of the above technical solutions, further, the installation chamber is provided with a push-out mechanism, which includes:

[0030] The cylinders are located on the left and right sides inside the mounting chamber, and there are four cylinders in total.

[0031] The push plate is mounted on the cylinder piston rod and located between the four cylinder piston rods, with the push plate located on the lower side inside the inner shell.

[0032] In any of the above technical solutions, the displacement sensor is further provided with a threaded section at the upper end, with an external thread on the outside of the threaded section and an internal thread inside the cantilever. The external thread on the threaded section is threadedly connected to the internal thread inside the cantilever so that the needle can be replaced.

[0033] In any of the above technical solutions, a guiding mechanism is further included, which includes:

[0034] Fixed plates are installed on the upper left and right sides of the support plate;

[0035] Guide rod, mounted on the fixed plate;

[0036] The sliding sleeve is slidably mounted on the guide rod and is fixedly connected to the cantilever.

[0037] The beneficial effects of this utility model are:

[0038] 1. Through heating and cooling units, the system simulates the high and low temperature environments that asphalt may encounter in actual use. Through displacement sensors and needles, the hardness of asphalt samples at different temperatures is accurately detected. Temperature sensors can monitor the temperature changes of asphalt samples in real time, ensuring the accuracy of data during the test. By connecting the displacement sensors to a computer, the system records the hardness changes of asphalt in real time, providing a basis for subsequent data analysis. In this way, hardness tests can be performed in high and low temperature environments, simulating the actual performance of asphalt under different climatic conditions, and monitoring the temperature changes of asphalt in real time, recording the hardness data of asphalt under different temperature conditions.

[0039] 2. Using a cylinder as a power source provides a stable and adjustable driving force, enabling the equipment to automatically perform the pushing or pushing of asphalt, thereby reducing manual operation and improving the working efficiency and reliability of the equipment.

[0040] 3. By adopting a threaded connection, the maintenance and needle replacement of the equipment become simpler and faster, reducing the complexity of operation. Users only need to unscrew the threaded connection to replace or clean the needle, avoiding the trouble of disassembling complex parts. With the replaceable needle module, users can select different specifications and types of needles according to different needs, thereby adapting to the hardness testing requirements of different asphalt materials.

[0041] 4. The combination of the sliding sleeve, guide rod and fixing plate can guide the cantilever to move accurately in the vertical or horizontal direction, avoiding inaccurate cantilever movement trajectory caused by external force or improper operation, ensuring that displacement measurement and needle positioning in hardness testing remain accurate, thereby improving the accuracy of asphalt hardness testing. Attached Figure Description

[0042] Figure 1 This is a first three-dimensional structural schematic diagram of this utility model;

[0043] Figure 2 This is a schematic diagram of the second three-dimensional structure of this utility model;

[0044] Figure 3 This is a partial three-dimensional structural schematic diagram of this utility model;

[0045] Figure 4 This is an exploded view of the threaded section of this utility model;

[0046] The reference numerals in the figure are as follows: 1. Bottom shell; 2. Mounting chamber; 3. Support plate; 4. Mounting bracket; 5. Electric push rod; 6. Cantilever; 7. Displacement sensor; 8. Needle; 9. Computer; 10. Insulation shell; 11. Inner shell; 12. Heating unit; 121. Heater; 13. Cooling unit; 131. Liquid storage tank; 132. Water pump; 133. Water outlet pipe; 134. Water supply pipe; 135. Water cooling pipe; 14. Temperature sensor; 15. Pushing mechanism; 151. Cylinder; 152. Push plate; 16. Threaded section; 161. External thread; 162. Internal thread; 17. Guide mechanism; 171. Fixing plate; 172. Guide rod; 173. Sliding sleeve. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0048] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0049] Example 1:

[0050] like Figures 1-3 As shown, this embodiment provides an asphalt stability testing device, including:

[0051] The bottom shell 1 has an installation chamber 2 inside it;

[0052] Support plate 3 is located on the top of bottom shell 1;

[0053] Mounting bracket 4 is mounted on support plate 3 by means of bolt connection;

[0054] Electric push rod 5 is mounted on mounting bracket 4;

[0055] Cantilever 6 is mounted on electric push rod 5;

[0056] Displacement sensors 7, multiple of them, are located at the bottom of the cantilever 6;

[0057] Needle 8 is located at the bottom of displacement sensor 7;

[0058] Computer 9 is mounted on the bottom shell 1 and is connected to displacement sensor 7 via wires.

[0059] The heat insulation shell 10 is disposed on the bottom shell 1, and one end of the heat insulation shell 10 extends through into the mounting chamber 2 of the bottom shell 1.

[0060] The inner shell 11 is located inside the insulation shell 10 and is used to fill asphalt;

[0061] The heating unit 12 is located inside the insulation shell 10 and outside the inner shell 11, and is used to simulate the real performance of asphalt under high temperature environment.

[0062] The cooling unit 13 is located inside the insulation shell 10 and outside the inner shell 11, and is used to simulate the real performance of asphalt in a low-temperature environment.

[0063] Temperature sensor 14 is installed on the outer wall of insulation shell 10 for real-time monitoring of asphalt temperature changes. Temperature sensor 14 is electrically connected to computer 9.

[0064] The heating unit 12 and cooling unit 13 simulate the real performance of asphalt under high and low temperature environments and record the temperature changes of asphalt in real time, providing more comprehensive performance data.

[0065] In this technical solution, the heating unit 12 and cooling unit 13 simulate the high and low temperature environments that asphalt may encounter in actual use. The displacement sensor 7 and needle 8 accurately detect the hardness of the asphalt sample at different temperatures. The temperature sensor 14 monitors the temperature changes of the asphalt sample in real time, ensuring the accuracy of the data during the test. A computer 9 connected to the displacement sensor 7 records the hardness changes of the asphalt in real time, providing a basis for subsequent data analysis.

[0066] Specifically, the base shell 1 supports the entire equipment system, while the mounting chamber 2 provides support and placement space for internal components, ensuring the stability and structural safety of the equipment. A support plate 3 is located on top of the base shell 1, providing support. The mounting bracket 4 is bolted to the support plate 3, ensuring stable installation of other equipment components. An electric push rod 5 drives the up-and-down movement of the cantilever 6, which suspends and supports the displacement sensor 7 and the needle 8. The electric push rod 5 adjusts its length according to a control signal, thereby precisely controlling the puncture depth of the needle 8. Multiple displacement sensors 7 are installed at the bottom of the cantilever 6 to monitor the displacement of the needle 8 in the asphalt sample in real time, detecting changes in asphalt hardness. The data is transmitted to a computer 9 for processing and recording. The computer 9 is connected to the displacement sensors 7 via wires, receiving and processing asphalt hardness data in real time. The computer 9 can display the asphalt hardness in real time and generate data reports for subsequent analysis. The insulation shell 10 maintains a stable internal temperature, preventing external temperature fluctuations from affecting the asphalt sample. The inner shell 11 is used to fill the asphalt sample and ensure its fixed position within the equipment. Heating unit 12 and cooling unit 13 are located inside the insulation shell 10, and are used to simulate the performance of asphalt under high and low temperature environments, respectively. Heating unit 12 heats the asphalt sample to the required high temperature, while cooling unit 13 is used for rapid cooling to simulate the hardness change of asphalt under low temperature environments. Temperature sensor 14 is located on the outer wall of the insulation shell 10 to monitor the temperature change of the asphalt sample in real time and transmit the data to computer 9. This function ensures that the temperature of the asphalt sample always meets the experimental requirements during the test.

[0067] Workflow: The asphalt sample to be tested is filled into the inner shell 11, ensuring the uniformity and stability of the asphalt sample and ensuring that the temperature sensor 14 is properly connected to the computer 9. According to the testing requirements, the target test temperature of the asphalt sample is set via the computer 9 or the manual control panel. The heating unit 12 starts working, gradually heating the asphalt sample to the required high temperature, while the cooling unit 13 activates its cooling function to lower the asphalt sample to a low temperature. The temperature sensor 14 monitors and provides feedback on the current temperature of the asphalt sample in real time, and displays it on the computer 9, ensuring that the temperature remains stable within the predetermined range during the test. The electric push rod 5 drives the cantilever 6 to move, causing the displacement sensor 7 to precisely contact the needle 8 on the surface of the asphalt sample. According to the set load, the needle 8 inserts into the asphalt and generates a certain displacement. The displacement sensor 7 senses the displacement of the needle 8 in real time, measures the insertion depth of the needle 8, and transmits the data to the computer 9. The computer 9 calculates the hardness of the asphalt based on the displacement data and updates the data on the display screen in real time, recording the penetration (i.e., hardness) of the asphalt. All test data (including temperature and hardness data) are recorded by computer 9 and corresponding test reports are generated. Users can view asphalt hardness data under different temperature conditions as needed to analyze the performance of asphalt. Data can be exported in report format for easy archiving and subsequent analysis. The equipment allows users to conduct multiple hardness tests at different temperatures, simulating the temperature changes of asphalt in actual use. Through the cooperation of heating and cooling units 13, the equipment can simulate the actual performance of asphalt at high temperature, room temperature, and low temperature, providing more comprehensive performance data. After the test is completed, users can turn off the heating and cooling system, remove the asphalt sample, and clean and maintain the equipment to ensure its long-term stable operation.

[0068] like Figure 3 As shown, in this embodiment, the optimized heating unit 12 includes two heaters 121, which are disposed on the front and rear sides inside the insulation shell 10 and located on the outer wall of the inner shell 11.

[0069] In this technical solution, by arranging two heaters 121 on the front and rear sides of the insulation shell 10 respectively, heat can be distributed more evenly to all areas of the asphalt sample, thereby avoiding local overheating or undercooling and ensuring uniform temperature of the asphalt sample. With two heaters 121, the system can raise the temperature of the asphalt more quickly, and the front-rear heating method can shorten the heating time and improve testing efficiency. Due to the coordinated operation of the two heaters 121, the heating process of the asphalt sample can be controlled more precisely; this is especially important for high-temperature testing, avoiding testing errors caused by temperature instability. By arranging the heaters 121 in different locations (front and rear sides), excessive temperature concentration in one area can be avoided, preventing a large temperature gradient within the asphalt sample and ensuring that the temperature of the asphalt sample remains uniform throughout the testing process.

[0070] First, during device initialization, computer 9 receives the set temperature requirements and controls the start and stop of heating unit 12. The user needs to select the required test temperature according to experimental needs (for example, a high-temperature test might be set to 60℃ or higher).

[0071] After setting the target temperature, the two heaters 121 begin operation. The heaters 121 electrically heat internal heating elements (such as heating wires or PTC ceramic heating elements), gradually increasing the internal temperature of the insulation shell 10. Because the heaters 121 are placed on the front and rear sides of the insulation shell 10, heat can be transferred from different directions to the asphalt sample surrounding the inner shell 11. The design of the heaters on the front and rear sides ensures a more uniform heating process. Through real-time monitoring of the internal temperature of the insulation shell 10 (assisted by the temperature sensor 14), the system automatically adjusts the power output of the heaters 121 to ensure stable temperature changes and prevent overheating. The temperature sensor 14, connected to the computer 9, monitors the temperature of the asphalt sample in real time. When the temperature reaches the set range, the computer 9 feeds back to the control system, adjusting the operating status of the heaters 121 to maintain temperature stability. Through the coordinated operation of the two heaters 121, the equipment can efficiently and accurately regulate the heating process, avoiding uneven temperature or overheating caused by a single heating source. Users can view the asphalt hardness at different temperatures, thus obtaining information on the performance of asphalt in practical applications. After the test is completed, the user can turn off the heater 121 and remove the asphalt sample. The internal temperature sensor 14 and control system will guide the equipment into standby mode, and the cooling process will automatically start to ensure the equipment temperature is safe.

[0072] like Figures 1-3 As shown, in this embodiment, the optimized cooling unit 13 includes:

[0073] The liquid storage tank 131 is located on the left and right sides inside the installation chamber 2;

[0074] Water pump 132 is located on the left and right sides of the bottom shell 1;

[0075] The outlet pipe 133 is connected at one end to the liquid storage tank 131 and at the other end to the water pump 132;

[0076] Water supply pipe 134 is installed on water pump 132;

[0077] Water cooling pipe 135 is located on the left and right sides inside the insulation shell 10 and outside the inner shell 11. The lower end of the water cooling pipe 135 is connected to the liquid storage tank 131, and the upper end passes through the insulation shell 10 and is connected to the water supply pipe 134.

[0078] In this technical solution, temperature control during the asphalt hardness testing process is crucial because temperature directly affects the physical properties of asphalt, thus impacting the accuracy of the test results. The cooling unit 13 uses circulating water cooling to maintain the internal temperature of the equipment within a preset stable range, ensuring the accuracy of the hardness test. Using water as the cooling medium not only efficiently removes heat but also reduces the energy consumption required for cooling equipment. Furthermore, water recycling helps reduce energy waste, meeting the requirements of environmental protection and energy conservation.

[0079] Workflow: The storage tank 131 in the cooling unit 13 stores coolant (usually water) and provides a continuous cooling water source. The water pump 132 drives the water circulation. The pump draws water from the storage tank 131 through the outlet pipe 133 and delivers it to the water-cooling pipe 135 through the supply pipe 134. The water-cooling pipe 135 efficiently absorbs and removes heat generated by the equipment through contact with the outside of the inner shell 11. The lower end of the water-cooling pipe 135 is connected to the storage tank 131. The circulating water flows through the water-cooling pipe 135 and returns to the storage tank 131, forming a closed loop. Through its effective heat dissipation function, the water-cooling pipe 135 removes heat generated by the inner shell 11 and the equipment, keeping the asphalt stability testing equipment within the set stable temperature range.

[0080] When the equipment starts working, the cooling water begins to circulate. The coolant flows out from the storage tank 131, is pressurized by the water pump 132, and then sent to the water-cooling pipe 135. Through heat exchange with the outer wall of the inner shell 11, the cooling water carries away the heat from the inner shell 11. After passing through the water-cooling pipe 135, the water temperature rises and then returns to the storage tank 131. During this process, the coolant continuously circulates, cooling the asphalt sample to a low temperature. The temperature sensor 14 monitors and provides feedback on the current temperature of the asphalt sample in real time, thereby detecting the performance of the asphalt in a low-temperature environment. This helps to more accurately assess the quality of asphalt materials, guide the production, construction, and maintenance of asphalt, and further improve the effectiveness and safety of road construction and maintenance.

[0081] like Figure 2 and Figure 3 As shown, in this embodiment, the optimized water-cooling pipe 135 is an extension of a copper bend.

[0082] In this technical solution, copper, with its excellent thermal conductivity, is a commonly used high-efficiency heat exchange material. Copper can more quickly conduct heat from the equipment to the water-cooled pipe 135, thereby improving heat dissipation efficiency. The copper bend design allows heat to be evenly distributed over a wider area, ensuring that the equipment's performance is not affected by excessive temperature during operation. Copper has strong corrosion resistance in common working environments, especially for coolants in water circulation systems, effectively reducing corrosion problems caused by prolonged use. By using copper pipes, the service life of the cooling system is extended, reducing the frequency of maintenance and component replacement. The copper bend design increases the degree of pipe bending, which not only increases the contact area between the water flow and the pipe wall but also enhances the turbulence effect of the water flow, allowing the water to carry away more heat as it flows within the pipe. The extended bend also helps the pipes fully cover all parts of the equipment within a limited space, improving the cooling effect. The design of the copper bend can be flexibly configured according to the internal structure of the equipment, making reasonable use of space and ensuring that the water-cooling pipe 135 can extend to the left and right sides inside the insulation shell 10. This increases the flexibility of the cooling pipe layout and helps to avoid the excessive space occupied by straight pipe layouts. Due to the good thermal conductivity of copper, the use of the water-cooling pipe 135 can effectively reduce the thermal resistance of the cooling system, allowing heat to be quickly dissipated from the inside of the equipment, thereby improving cooling efficiency and ensuring that the equipment maintains a stable operating temperature under different workloads.

[0083] Example 2:

[0084] This embodiment provides an asphalt stability testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0085] like Figure 1 and Figure 2 As shown, in this embodiment, the optimized installation chamber 2 is provided with a push-out mechanism 15, which includes:

[0086] Cylinder 151 is located on the left and right sides inside the mounting chamber 2. There are four cylinders 151 in total.

[0087] Push plate 152 is disposed on piston rod of cylinder 151 and located between piston rods of four cylinders 151, and push plate 152 is located on the lower side inside inner shell 11.

[0088] In this technical solution, a cylinder 151 is used as the power source, providing a stable and adjustable driving force. This allows the equipment to automatically perform pushing or pushing operations, reducing manual operation and improving the equipment's efficiency and reliability. The cylinder 151 precisely pushes the push plate 152, thereby moving the asphalt inside the inner shell 11. After testing, the asphalt inside the inner shell 11 is pushed out, saving time and eliminating the need for manual cleaning. The cylinder 151 can precisely control the position and speed of the push plate 152, allowing the asphalt to complete specific operations at specific positions. Through the combination of the push plate 152 and the cylinder 151, the equipment can perform various operations, such as taking out or removing asphalt samples, or other functions requiring the pushing of the inner shell 11, enhancing the equipment's versatility. The use of the pushing mechanism 15 further automates the asphalt stability testing equipment. After the user sets the relevant parameters, the equipment can automatically complete the relevant pushing or pushing operations as needed, reducing manual intervention and improving testing efficiency.

[0089] Example 3:

[0090] This embodiment provides an asphalt stability testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0091] like Figure 4 As shown, in this embodiment, the displacement sensor 7 is optimized to have a threaded section 16 at its upper end, with an external thread 161 on the outside of the threaded section 16 and an internal thread 162 inside the cantilever 6. The external thread 161 on the threaded section 16 is threadedly connected to the internal thread 162 inside the cantilever 6 so that the needle 8 can be replaced.

[0092] In this technical solution, to improve the flexibility and adaptability of the asphalt stability testing equipment, a threaded connection structure is designed, allowing for easy replacement of the needle 8 on the displacement sensor 7. By adopting a threaded connection, equipment maintenance and needle 8 replacement become simpler and faster, reducing operational complexity. Users only need to unscrew the threaded connection to replace or clean the needle 8, avoiding the hassle of disassembling complex components. The replaceable needle 8 design ensures that the equipment always uses a needle 8 in good condition for each test, avoiding detection errors caused by needle 8 damage or wear, thereby improving detection accuracy and test stability. The upper end of the displacement sensor 7 has a threaded section 16, with the external thread 161 tightly engaging with the internal thread 162 of the cantilever 6. This threaded connection ensures the fixation of the needle 8 to the displacement sensor 7 and allows for convenient replacement of the needle 8 when needed. Due to the precise fit of the threaded connection, the needle 8 can be automatically aligned and fixed during replacement, avoiding deviations or instability that occur during manual operation, ensuring the accuracy of the test. With the replaceable needle 8 module, users can select different specifications and types of needles 8 according to different needs, thereby adapting to the hardness testing requirements of different asphalt materials.

[0093] Example 4:

[0094] This embodiment provides an asphalt stability testing device, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0095] like Figure 1 and Figure 2 As shown, in this embodiment, the optimization further includes a guide mechanism 17, which includes:

[0096] Fixed plate 171 is set on the upper left and right sides of support plate 3;

[0097] Guide rod 172 is mounted on fixed plate 171;

[0098] Sliding sleeve 173 is slidably mounted on guide rod 172 and fixedly connected to cantilever 6.

[0099] In this technical solution, the combination of the sliding sleeve 173, guide rod 172, and fixing plate 171 ensures the stable movement of the cantilever 6, preventing it from swaying, deviating, or becoming unstable, thereby improving the accuracy of the asphalt hardness test. The guiding mechanism 17 guides the cantilever 6 to move precisely in the vertical or horizontal direction, preventing inaccuracies in the cantilever 6's trajectory due to external forces or improper operation, ensuring that displacement measurement and needle 8 positioning remain accurate throughout the hardness test. Through the design of the guiding mechanism 17, the equipment can maintain precise guidance and stable movement in multiple directions, greatly improving the automation level and long-term reliability of the equipment, and reducing the risk of failure due to loose or deformed components.

[0100] When the equipment is ready to perform asphalt hardness testing, the electric push rod 5 is first activated. The electric push rod 5 pushes the cantilever 6 up and down. Through the sliding engagement of the sliding sleeve 173 and the guide rod 172, the cantilever 6 ensures precise sliding movement within the specified range, avoiding any deviation or instability. The smooth sliding of the cantilever 6 allows the needle 8 to contact the asphalt sample stably for hardness testing. The guide mechanism 17 ensures that the cantilever 6 does not deviate during movement, thus ensuring accurate positioning and measurement in each test.

[0101] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An asphalt stability testing device, characterized in that, include: The bottom shell (1) has an installation chamber (2) inside it; A support plate (3) is disposed on the top of the bottom shell (1); The mounting bracket (4) is installed on the support plate (3) by means of bolt connection; An electric push rod (5) is mounted on the mounting bracket (4); A cantilever (6) is mounted on the electric push rod (5); Displacement sensors (7), having multiple components, are disposed at the bottom of the cantilever (6); The needle (8) is located at the bottom of the displacement sensor (7); A computer (9) is mounted on the bottom shell (1), and the computer (9) is connected to the displacement sensor (7) via a wire; A heat insulation shell (10) is disposed on the bottom shell (1), and one end of the heat insulation shell (10) extends through into the mounting chamber (2) of the bottom shell (1); The inner shell (11) is disposed inside the insulation shell (10) and is used to fill asphalt; A heating unit (12) is disposed inside the heat insulation shell (10) and outside the inner shell (11) to simulate the real performance of asphalt under high temperature environment; A cooling unit (13) is disposed inside the insulation shell (10) and outside the inner shell (11) to simulate the real performance of asphalt in a low-temperature environment; A temperature sensor (14) is installed on the outer wall of the insulation shell (10) for real-time monitoring of the temperature change of the asphalt. The temperature sensor (14) is electrically connected to the computer (9). Among them, the heating unit (12) and the cooling unit (13) simulate the real performance of asphalt under high temperature and low temperature environments, and record the temperature change of asphalt in real time, providing more comprehensive performance data.

2. The asphalt stability testing equipment according to claim 1, characterized in that, The heating unit (12) includes heaters (121), there are two heaters (121), which are located on the front and rear sides inside the insulation shell (10) and on the outer wall of the inner shell (11).

3. The asphalt stability testing equipment according to claim 1, characterized in that, The cooling unit (13) includes: A liquid storage tank (131) is located on the left and right sides inside the installation chamber (2); A water pump (132) is installed on the left and right sides of the bottom shell (1); The water outlet pipe (133) is connected at one end to the liquid storage tank (131) and at the other end to the water pump (132); A water delivery pipe (134) is installed on the water pump (132); Water cooling pipe (135) is located on the left and right sides inside the insulation shell (10) and outside the inner shell (11). The lower end of the water cooling pipe (135) is connected to the liquid storage tank (131), and the upper end passes through the insulation shell (10) and is connected to the water supply pipe (134).

4. The asphalt stability testing equipment according to claim 3, characterized in that, The water-cooling pipe (135) is an extension of a copper bend.

5. The asphalt stability testing equipment according to claim 1, characterized in that, The installation chamber (2) is provided with a push-out mechanism (15), which includes: Cylinders (151) are located on the left and right sides inside the mounting chamber (2), and there are four cylinders (151) in total; A push plate (152) is disposed on the piston rod of the cylinder (151) and located between the four piston rods of the cylinder (151), and the push plate (152) is located on the lower side inside the inner shell (11).

6. The asphalt stability testing equipment according to claim 1, characterized in that, The displacement sensor (7) has a threaded section (16) at its upper end. The threaded section (16) has an external thread (161) on its outer side and an internal thread (162) inside the cantilever (6). The external thread (161) on the threaded section (16) is threadedly connected to the internal thread (162) inside the cantilever (6) so that the needle (8) can be replaced.

7. The asphalt stability testing equipment according to claim 1, characterized in that, It also includes a guiding mechanism (17), which includes: A fixing plate (171) is provided on the upper left and right sides of the support plate (3); A guide rod (172) is disposed on the fixed plate (171); A sliding sleeve (173) is slidably disposed on the guide rod (172), and the sliding sleeve (173) is fixedly connected to the cantilever (6).

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