Aging oven for simulating actual environment through multi-factor coupling

Abstract

The utility model discloses an aging oven for simulating actual environment through multi-factor coupling, which comprises an experiment box body, the experiment box body comprises a solution chamber, an aging chamber and a regulation and control chamber, the regulation and control chamber is arranged at the lower part of the experiment box body, and the aging chamber and the solution chamber are arranged at the upper part of the experiment box body; a solution system is arranged in the solution chamber and connected with a spraying device, the spraying device is arranged on the upper portion of the aging chamber, a tray is arranged under the spraying device and fixed in the aging chamber through a pull-up rod, a shutter is arranged between the regulation and control chamber and the aging chamber, and a regulation and control channel is arranged below the shutter. A refrigerating and humidifying device and a heating and humidifying device are arranged below the regulation and control channel; and an exhaust collection system is arranged on the side wall of the aging chamber. According to the device, various factors can be coupled, various environmental factors such as illumination, temperature, humidity, water solutions with different PH values and salt contents and the like are considered in the test process, the comprehensiveness is higher, the device is closer to the real environment, and the aging performance of the asphalt material can be evaluated more comprehensively.

Description

Technical Field

[0001] This utility model relates to the field of asphalt material testing, specifically to an aging oven that uses multi-factor coupling to simulate the actual environment. Background Technology

[0002] Asphalt is a complex mixture of high-molecular-weight hydrocarbons and their non-metallic (oxygen, sulfur, nitrogen) derivatives, widely used in road paving and repair. Asphalt's resistance to aging is a crucial indicator of its performance. It refers to asphalt's ability to resist the corrosive effects of the natural environment (such as ultraviolet radiation, oxygen, temperature changes, and corrosion from salt solutions, acidic or alkaline solutions) and traffic loads during long-term use. Aging of asphalt leads to a decline in its performance and corresponding changes in three key indicators: reduced penetration, decreased ductility, and increased softening point, thus affecting the service life of asphalt pavements and increasing safety hazards.

[0003] Currently, the main methods for testing and evaluating the long-term aging performance of asphalt include: pressure aging test (PAV), which uses a pressure aging heating test device to age the asphalt for a longer period of time under higher temperature and pressure, equivalent to about 5 years of aging of the surface asphalt of the road surface during its service life; ultraviolet radiation method, which places the asphalt sample in an ultraviolet radiation chamber, turns on the ultraviolet lamp and heats it, so that the sample ages under ultraviolet irradiation, thereby simulating the effect of ultraviolet radiation in sunlight; natural aging test; pressure oxidation treatment; long-term oven heating method, etc.

[0004] However, current experimental methods suffer from limitations in data and are susceptible to subjective judgment. Furthermore, they do not fully simulate the aging environment of asphalt during actual road use, lacking testing and evaluation of the effects of various solutions, such as salt solutions, acids, and alkalis, on the chemical corrosion and physical property changes of asphalt materials. Chloride ions in salt solutions react with ene resins or other components in asphalt, leading to degradation and deterioration, reduced durability, and potential cracking and potholes in the road surface. During freeze-thaw cycles, the crystallization and expansion pressures of salt solutions increase cracks and voids in the asphalt mixture, reducing its overall stability. Acidic solutions can chemically react with asphalt, breaking chemical bonds and roughening the surface, affecting stability and durability. Hydroxide ions in alkaline solutions react with hydroxyl groups or other active groups in asphalt, reducing viscosity and hardness, and may also cause acidification, neutralization reactions, and accelerated degradation and aging. Simultaneously, temperature and humidity, as key environmental parameters, work together to affect the performance, aging process, and durability of asphalt materials. Temperature changes not only directly affect the physical state of asphalt, such as softening at high temperatures and embrittlement at low temperatures, but also accelerate its thermo-oxidative aging, leading to changes in molecular structure and consequently reducing the material's mechanical properties and durability. High temperatures cause the lightweight components in asphalt to volatilize, altering its composition, while low temperatures may lead to internal stress concentration, increasing the risk of cracking. Humidity, through the action of water, poses another layer of threat to asphalt materials. Asphalt has a certain degree of water absorption, and increased humidity exacerbates its water absorption, which may not only weaken the adhesion between asphalt and aggregates, causing spalling and pitting, but may also cause more severe damage during freeze-thaw cycles. Water, as a carrier of corrosive media, can accelerate the penetration and corrosion of asphalt by salt solutions, acidic or alkaline solutions, further damaging its structure and properties. In summary, temperature, humidity, salt solutions, and acidic or alkaline solutions all have a significant impact on asphalt materials; therefore, these factors need to be fully considered, and corresponding tests and evaluation experiments need to be conducted. Utility Model Content

[0005] The purpose of this invention is to provide an aging oven that simulates the actual environment through multi-factor coupling, in order to solve the problem that the existing technology has only one testing factor and cannot truly and effectively test the performance of asphalt.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an aging oven that simulates a real environment by coupling multiple factors, including an experimental chamber, an aging chamber and a control chamber. The lower part of the experimental chamber is the control chamber, and the upper part is the aging chamber and the solution chamber.

[0008] A solution system is installed in the solution chamber, which is connected to a spraying device. The spraying device is located at the top of the aging chamber, and a tray is placed directly below the spraying device. The tray is fixed inside the aging chamber by a lifting rod. A louver is installed between the control chamber and the aging chamber. A control channel is installed below the louver, and a cooling and humidifying device and a heating and humidifying device are installed below the control channel. An exhaust collection system is installed on the side wall of the aging chamber.

[0009] The solution system includes a water tank connected to an acid salt container, a water pump installed in the water tank, and a spraying device connected to the water tank.

[0010] The aging chamber is equipped with temperature and humidity monitoring units.

[0011] The experimental chamber is equipped with an external control device, which is connected to the solution system, refrigeration and humidification device, heating and humidification device, temperature monitoring unit, humidity monitoring unit, and exhaust collection system.

[0012] The exhaust collection system includes an air collection device, which is installed on the inner wall of the aging chamber and connected to an external collection device outside the aging chamber via an exhaust pipe.

[0013] A filtration and purification device is installed on the exhaust pipe, and the filtration and purification device includes an adsorption layer.

[0014] The aging chamber has a door on its experimental chamber, and the door has an observation window.

[0015] The upper part of the experimental chamber is divided into an aging chamber and a solution chamber by a partition.

[0016] The lifting rod is a rotary lifting rod.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention relates to an aging oven that uses multi-factor coupling to simulate a real-world environment. The oven is divided into three parts: a solution chamber with a solution system connected to a spraying device to provide different solutions for simulating the effects of different weather conditions on asphalt; a lifting rod for easy adjustment of sample position and height; and a cooling and humidifying device and a heating and humidifying device to provide the required temperature and humidity for the aging chamber, with temperature and humidity exchanged through louvers and control channels. An exhaust collection system is also included to remove waste gases generated during the aging process, maintaining a clean experimental environment. This invention couples multiple factors, considering light, temperature, humidity, and aqueous solutions with different pH values ​​and salinity levels, resulting in a more comprehensive and realistic simulation of the aging performance of asphalt materials. The aging oven can simulate a long-term natural aging process in a shorter time, improving experimental efficiency. The simulated environment is highly repeatable, helping to ensure the reliability and accuracy of experimental data. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the interior of the aging oven that simulates the actual environment using multi-factor coupling, as described in this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the aging oven for simulating the actual environment using multi-factor coupling according to this utility model;

[0022] Figure 3 This is a schematic diagram of the exhaust air collection system of the aging oven for simulating the actual environment using multi-factor coupling.

[0023] Figure 4 This is a schematic diagram of the louvers of the aging oven for simulating the actual environment using multi-factor coupling, as described in this utility model.

[0024] Figure 5 This is a schematic diagram of the filtration and purification device of the aging oven that simulates the actual environment using multi-factor coupling according to this utility model.

[0025] In the diagram: 1. Experimental chamber; 2. Control device; 3. Door; 4. Solution system; 5. Filtration and purification device; 6. Collection device; 7. Refrigeration and humidification device; 8. Heating and humidification device; 9. Solution chamber; 10. Aging chamber; 11. Control chamber; 12. Water tank; 13. Spraying device; 14. Tray; 15. Lifting rod; 16. Temperature monitoring unit; 17. Humidity monitoring unit; 18. Gas collection device; 19. Adsorption layer; 20. Louver; 21. Control channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the utility model product is in use. These are merely for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] The present invention will now be described in further detail with reference to the accompanying drawings:

[0033] like Figure 1 and Figure 2 As shown, the aging oven for simulating the actual environment by multi-factor coupling provided by this utility model includes an experimental chamber 1, which includes a solution chamber 9, an aging chamber 10, and a control chamber 11. The lower part of the experimental chamber 1 is the control chamber 11, and the upper part is divided into the aging chamber 10 and the solution chamber 9 by a partition. A control device 2 is installed outside the experimental chamber 1.

[0034] The aging chamber 10 and the solution chamber 9 are separated into two parts to ensure the stability of the experimental environment. The experimental chamber 1 is made of corrosion-resistant and well-sealed material. A door 3 is provided on the front side of the experimental chamber 10, and an observation window is provided on the door 3. This can not only be used to simulate the effects of natural light and ultraviolet radiation, but also allow the test personnel to observe the changes in the asphalt in real time.

[0035] A solution system 4 is installed in solution chamber 9. Solution system 4 includes a water tank 12, which is connected to an acid salt container. A water pump is installed in water tank 12, and pipes are connected to water tank 12. The pipes pass through a partition and are connected to a spraying device 13. Solution system 4 is used to provide aqueous solutions with different pH values ​​and salt contents to the aging chamber. Solution system 4 can be replaced with different solutions to facilitate the simulation of the effects of various solutions on asphalt under different weather conditions.

[0036] The spraying device 13 is installed on the upper part of the aging chamber 10, and a tray 14 is installed directly below the spraying device 13. The tray 14 is fixed to the aging chamber 10 by a lifting rod 15 and is used to hold the sample. The lifting rod 15 is a rotating lifting rod so that its height and angle can be adjusted to hold asphalt samples of different sizes. A temperature monitoring unit 16 and a humidity monitoring unit 17 are installed inside the aging chamber 1. The temperature monitoring unit 16 is used to monitor the temperature in the aging chamber 1, and the humidity monitoring unit 17 is used to monitor the humidity in the aging chamber 1.

[0037] like Figure 1 and Figure 4As shown, a louver 20 is provided between the control chamber 11 and the aging chamber 10. A control channel 21 is provided below the louver 20. A cooling and humidifying device 7 and a heating and humidifying device 8 are provided below the control channel 21.

[0038] like Figure 1 , Figure 3 and Figure 5 As shown, an exhaust collection system is installed on the side wall of the aging chamber 10. The exhaust collection system includes a gas collection device 18, which is installed on the inner wall of the aging chamber 10. The gas collection device 18 is connected to a collection device 6 outside the aging chamber 10 through an exhaust pipe. A filtration and purification device 5 is installed on the exhaust pipe. The filtration and purification device 5 includes an adsorption layer 19, which includes an activated carbon adsorption layer and a chemical absorption layer. The gas collection device 18 ensures that harmful gases and vapors generated during the experiment can be quickly extracted. The filtration and purification device 5 is used to remove harmful substances in the exhaust gas, such as acidic gases and volatile organic compounds. The collection device 6 is used to collect the filtered and purified gas and can connect it to other exhaust gas treatment systems for centralized and unified treatment, preventing direct discharge into the air from causing negative impacts on human health and the environment.

[0039] The control device 2 is connected to the solution system 4, the cooling and humidifying device 7, the heating and humidifying device 8, the temperature monitoring unit 16, the humidity monitoring unit 17, and the exhaust collection system. The control device 2 integrates control functions for temperature, humidity, and solution parameters. The data can be displayed on the screen, enabling precise control and data recording during the experiment.

[0040] The operation process of this novel improved thin-film drying oven that simulates real-world aging:

[0041] Before the experiment, check the integrity of the apparatus to ensure that there are no impurities inside the experimental chamber, the wiring is complete, and all parts are in normal working order. Prepare the appropriate aqueous solution according to the experimental requirements and inject it into the water tank of the solution circulation system 4. Set the experimental parameters. Open the door 3 of the aging chamber 10, place the asphalt sample on the turntable 14, adjust the height using the lifting rod 15, and activate the spraying device 13 via the control device 2 to continuously supply the required aqueous solution to the aging chamber 1 through the solution system 4. During the experiment, the temperature monitoring unit 16 and humidity monitoring unit 17 monitor the temperature and humidity in real time and display them on the control device 2. The experimenter observes the temperature and humidity data and, as needed, turns on or off the cooling and humidifying device 7 and the heating and humidifying device 8 via the control device 2. The cooling and humidifying device 7 generates cold air, and the heating and humidifying device 8 generates steam, which is sent into the aging chamber 10 through louvers and control channels to adjust the temperature and humidity of the aging chamber 10. Simultaneously, the exhaust collection system is activated to extract harmful gases and steam generated during the experiment, filter and purify them through the exhaust duct 5, and finally discharge them into the collection device 6. After the experiment, all devices were shut down, asphalt samples were taken out for performance tests such as changes in mass and strength, the anti-aging performance of asphalt materials under this environment was evaluated and analyzed, and the collected waste gas was centrally and uniformly treated.

[0042] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art can still make modifications or equivalent substitutions to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model are within the protection scope of the claims of this utility model pending approval.

Claims

1. An aging oven that simulates a real-world environment through multi-factor coupling, characterized in that, The experimental chamber (1) includes a solution chamber (9), an aging chamber (10) and a control chamber (11). The lower part of the experimental chamber (1) is the control chamber (11), and the upper part is the aging chamber (10) and the solution chamber (9). A solution system (4) is installed in the solution chamber (9). The solution system (4) is connected to the spraying device (13). The spraying device (13) is installed on the upper part of the aging chamber (10). A tray (14) is installed directly below the spraying device (13). The tray (14) is fixed in the aging chamber (10) by a lifting rod (15). A louver (20) is installed between the control chamber (11) and the aging chamber (10). A control channel (21) is installed below the louver (20). A cooling and humidifying device (7) and a heating and humidifying device (8) are installed below the control channel (21). An exhaust collection system is installed on the side wall of the aging chamber (10).

2. The aging oven for simulating a real-world environment using multi-factor coupling as described in claim 1, characterized in that, The solution system (4) includes a water tank (12), which is connected to an acid salt container. A water pump is installed in the water tank (12), and the water tank (12) is connected to a spraying device (13).

3. The aging oven for simulating a real-world environment using multi-factor coupling as described in claim 1, characterized in that, A temperature monitoring unit (16) and a humidity monitoring unit (17) are installed inside the aging chamber (10).

4. The aging oven for simulating a real environment through multi-factor coupling according to claim 3, characterized in that, The experimental chamber (1) is equipped with a control device (2) on the outside. The control device (2) is connected to the solution system (4), the refrigeration and humidification device (7), the heating and humidification device (8), the temperature monitoring unit (16), the humidity monitoring unit (17), and the exhaust collection system.

5. An aging oven for simulating a real-world environment using multi-factor coupling as described in claim 1, characterized in that, The exhaust collection system includes an air collection device (18), which is installed on the inner wall of the aging chamber (10). The air collection device (18) is connected to the collection device (6) outside the aging chamber (10) through an exhaust pipe.

6. An aging oven for simulating a real-world environment using multi-factor coupling as described in claim 5, characterized in that, A filtration and purification device (5) is installed on the exhaust pipe. The filtration and purification device (5) includes an adsorption layer (19).

7. The aging oven for simulating a real environment through multi-factor coupling according to claim 1, characterized in that, The experimental chamber (1) of the aging chamber (10) is equipped with a door (3), and the door (3) is equipped with an observation window.

8. An aging oven for simulating a real-world environment using multi-factor coupling as described in claim 1, characterized in that, The upper part of the experimental chamber (1) is divided into an aging chamber (10) and a solution chamber (9) by a partition.

9. An aging oven for simulating a real-world environment using multi-factor coupling as described in claim 1, characterized in that, The lifting rod (15) is a rotary lifting rod.

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