A simulation experimental device for asphalt aging process

Abstract

The invention discloses a simulation experiment device in asphalt aging process, comprising a temperature-controlled aging box and an aging simulation device arranged in the temperature-controlled aging box, wherein an upper chamber and a lower chamber are arranged in the temperature-controlled aging box, a power chamber and water storage chambers located on the left and right sides of the power chamber are respectively arranged in the lower chamber, a sample tray of transparent material is horizontally rotatably connected in the upper chamber, a sample to be tested is arranged in the sample tray, an optical fiber sensor is horizontally arranged above the inside of the sample to be tested, a right fixed plate and a left fixed plate of "L"-shaped structure are respectively fixed to the outer walls of the left and right sides of the sample to be tested, a rolling mechanism is arranged between the two right fixed plates and the left fixed plates, and the aging simulation device comprises a sunshine device, a temperature control device and a spray device, and the sunshine device and the spray device of the invention can be used alternately through the cooperation of a lifting rod and a connecting rod; the invention is suitable for simulating the damage to asphalt pavement under the combined action of ultraviolet radiation, large temperature difference between day and night and load in high-altitude and cold areas.

Description

Technical Field

[0001] The invention relates to the technical field of asphalt aging test, in particular to a simulation experiment device in the asphalt aging process. Background Art

[0002] Asphalt aging is one of the main causes of asphalt concrete pavement damage. The damage to asphalt concrete pavement caused by asphalt aging is huge. There are many factors that cause asphalt aging, such as volatilization, oxidation, polymerization, light, water, etc. Before asphalt is put into use, it is necessary to conduct aging tests to verify the relevant properties of asphalt.

[0003] At present, there are two main methods used by scholars at home and abroad to study the UV aging of asphalt: natural atmospheric exposure and artificial accelerated aging. The natural atmospheric exposure method can almost perfectly restore the influence of various factors on asphalt under natural conditions, and the results obtained are naturally the closest to the actual situation, but its disadvantage is that the aging test cycle is too long and the repeatability of the test results is also poor. Therefore, artificial accelerated aging tests have been widely used.

[0004] The existing asphalt aging chambers on the market use ultraviolet light to simulate sunlight, but the distance between the ultraviolet lamp tube and the surface of the asphalt sample to be tested cannot be adjusted or is difficult to adjust, and a large error will be generated during the simulation process. Summary of the invention

[0005] The purpose of the present invention is to provide a simulation experimental device for asphalt aging process to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a simulation experiment device in the asphalt aging process, comprising a temperature-controlled aging box and an aging simulation device arranged in the temperature-controlled aging box, wherein the temperature-controlled aging box is provided with an upper chamber and a lower chamber, and the upper chamber is hinged with a switch door, and the lower chamber is also provided with a power chamber and a water storage chamber located on the left and right sides of the power chamber, an ambient temperature sensor for detecting the temperature inside the entire chamber is fixed at the top end of the upper chamber, a control switch group, a display screen and a controller electrically connected to all electronic devices are respectively provided on the outer side wall of the lower chamber, a sample tray made of a transparent material is horizontally rotatably connected in the upper chamber, and a sample to be tested is arranged in the sample tray, and a temperature-pressure dual-parameter all-fiber temperature sensor is horizontally arranged above the inside of the sample to be tested, a right fixed plate and a left fixed plate of an "L"-shaped structure are respectively fixed to the outer walls on the left and right sides of the sample to be tested, and a rolling mechanism is provided between the two right fixed plates and the left fixed plate, a coupler is fixed on the left side of the sample tray, and a laser adapted to the coupler is fixed on the side of the left fixed plate close to the sample tray;

[0007] The rolling mechanism includes a screw rod located above the sample tray and parallel to the bottom end surface of the sample tray, a pair of sliders sleeved on the screw rod and slidably connected to the screw rod, a rolling roller fixed to the bottom end of each slider and used to roll the sample to be tested, and a driving mechanism for driving the screw rod to rotate;

[0008] The aging simulation device includes a sunlight device, a spray device and a temperature control device, and the sunlight device includes a lifting rod vertically penetrating the upper end of the upper chamber, a reflective lampshade fixed on the bottom end of the lifting rod, a lamp holder fixed in the reflective lampshade and connected to the inner wall of the reflective lampshade in a vertical sliding direction, and a high-pressure pump lamp uniformly fixed on the bottom end of the lamp holder, and water seepage holes are uniformly opened at the position of the bottom end of the upper chamber facing the water storage chamber;

[0009] The spray device includes a water pump fixed in the water storage chamber, a water inlet pipe respectively embedded in the left and right side walls of the temperature-controlled aging box and connected to the corresponding water pump, two water outlet pipes horizontally located on the left and right sides above the upper chamber and symmetrical about the lifting rod, and water outlet mechanisms evenly distributed on the bottom end surface of each water outlet pipe, and the ends of the two water outlet pipes close to the lifting rod are both sealed ends, and the upper end of each water outlet pipe is vertically fixed with a guide support rod that is slidably connected to the inner wall of the top end of the upper chamber along a direction parallel to the water outlet pipe, each guide support rod is hinged to the side wall of the lifting rod through a connecting rod, and the end of each water outlet pipe away from the lifting rod is connected to the corresponding water inlet pipe through a corrugated hose, and a connecting spring is sleeved on the outside of the corrugated hose, one end of the connecting spring is connected to the water outlet pipe, and the other end is connected to the side wall in the upper chamber.

[0010] Preferably, the inner wall of the upper chamber is provided with a heat-insulating layer, and the heat-insulating layer is made of sponge material.

[0011] Preferably, a fan is fixed on the top of the temperature-controlled aging box, and the output end of the fan is connected to the interior of the upper chamber. An air outlet is also arranged on the top of the temperature-controlled aging box, and an electric switch valve is arranged on the air outlet.

[0012] Preferably, the driving mechanism includes a forward and reverse motor fixed in the power chamber and with the output shaft perpendicular to the lead screw, a driving rod passing through the right fixed plate through a bearing and perpendicular to the lead screw, a driving gear fixed on the top of the driving rod, and a driven gear fixed on the lead screw and matched with the driving gear, and the output shaft of the forward and reverse motor extends through the power chamber into the upper chamber and is fixed at the bottom center of the sample tray, and a transmission sprocket is fixed at the upper end of the output shaft of the forward and reverse motor located in the upper chamber and at the bottom end of the driving rod, and the two transmission sprockets are connected by a transmission chain.

[0013] Preferably, the lifting rod includes an adjusting sleeve slidably connected to a through hole vertically opened at the top of the upper chamber, an adjusting rod sleeved in the adjusting sleeve and threadedly connected to the inner wall of the adjusting sleeve, and a power mechanism for driving the adjusting sleeve to rise and fall, and the bottom end of the adjusting rod passes through the adjusting sleeve and extends into the reflective lampshade and is connected to the bottom end of the lamp holder, and the top end of the adjusting rod passes through the upper end of the adjusting sleeve and is fixed with a rotating handle.

[0014] Preferably, the power mechanism includes an adjusting gear fixed on the top of the temperature-controlled aging box, and the adjusting gear cooperates with a rack arranged on the upper side wall of the adjusting sleeve, and a reduction motor can be fixed on the rotating shaft of the adjusting gear.

[0015] Preferably, a sealing ring is provided on the inner wall of the bottom end of the through hole.

[0016] Preferably, the water outlet mechanism includes water outlet ends fixed at equal intervals on the bottom end of the water outlet pipe and a limiting cover with a sealing sleeve arranged on the outside of the water outlet end. Each of the water outlet ends has one end connected to the inside of the water outlet pipe and the other end is a flexible hose body with a sealed end. The sealed end of the flexible hose body is evenly provided with water outlet holes.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The aging simulation device in the present invention includes a sunlight device and a spray device. The sunlight device includes a lifting rod vertically penetrating the upper end of the upper chamber, a reflective lampshade fixed on the bottom end of the lifting rod, a lamp holder fixed in the reflective lampshade and connected to the inner wall of the reflective lampshade in a vertical sliding direction, and a high-pressure pump lamp evenly fixed on the bottom end of the lamp holder. The spray device includes a water pump fixed in the water storage chamber, water inlet pipes respectively embedded in the left and right side walls of the temperature-controlled aging box and connected to the corresponding water pumps, two water outlet pipes horizontally located on the left and right sides above the upper chamber and symmetrical about the lifting rod, and water outlet mechanisms evenly distributed on the bottom end surface of each water outlet pipe, the ends of the two water outlet pipes close to the lifting rod are both sealed ends, and each outlet pipe is A guide support rod is vertically fixed to the upper end of the water pipe, which is slidably connected to the inner wall of the top end of the upper chamber along a direction parallel to the water outlet pipe. Each guide support rod is hinged to the side wall of the lifting rod through a connecting rod. The end of each water outlet pipe away from the lifting rod is connected to the corresponding water inlet pipe through a corrugated hose. A connecting spring is sleeved on the outer side of the corrugated hose. One end of the connecting spring is connected to the water outlet pipe, and the other end is connected to the side wall in the upper chamber. The lifting rod includes an adjusting sleeve slidably connected to a through hole vertically opened at the top end of the upper chamber, an adjusting rod sleeved in the adjusting sleeve and threadedly connected to the inner wall of the adjusting sleeve, and a power mechanism for driving the adjusting sleeve to rise and fall. The bottom end of the adjusting rod passes through the adjusting sleeve and extends into the reflective lamp cover. The top of the adjusting rod is connected to the bottom end of the lamp holder, and a rotating handle is fixed on the upper end of the adjusting sleeve through the top of the adjusting sleeve. When the test sample is to be simulated with sunlight, the reduction motor is started to drive the adjusting gear to rotate and drive the adjusting sleeve to descend. In the process of the adjusting sleeve descending, the connecting rod pushes the water outlet pipe in the process of changing from an inclined state to a horizontal state. Under the action of the guide support rod, the water outlet pipe approaches the side wall of the upper chamber in the horizontal direction while squeezing the corrugated hose and the connecting spring. When the two water outlet pipes move to the left and right sides of the reflective lampshade, the adjusting gear is stopped. According to the experimental requirements, the high-pressure pump lamp is driven by the lamp holder to slide longitudinally along the inner wall of the reflective lampshade by rotating the rotating handle to meet the experimental requirements. To meet the experimental requirements, when simulating precipitation on the test sample (because there is no sunshine in rainy weather, the high-pressure pump lamp needs to be turned off), start the reduction motor to drive the adjusting gear to rotate in the opposite direction so that the adjusting sleeve drives the sunshine device to rise. In the process of the adjusting sleeve rising, when the connecting rod changes from a horizontal state to an inclined state, the connecting rod pulls the water outlet pipe and moves along the horizontal direction to the position of the straight line where the adjusting sleeve is located under the action of the guide support rod. When the two water outlet pipes are in contact, stop rotating the adjusting gear, and then you can turn the rotating handle to make the adjusting rod drive the lamp holder and the high-pressure pump lamp to rise along the reflective lampshade to prevent water droplets from entering the reflective lampshade and wetting the high-pressure pump lamp during the spraying process.After the above operations are completed, start the water pump. Under the action of the water pump, the water stored in the water tank passes through the water inlet pipe and the corrugated hose in turn into the water outlet pipe and then is sprayed onto the sample to be tested from the water outlet end. Since each of the water outlet ends is connected to the inside of the water outlet pipe at one end and a hose body with a sealed end at the other end, the sealed end of the hose body is evenly provided with water outlet holes, and the spray device can be started.

[0019] (2) From (1), it can be seen that the sunlight device and the sprinkler device of the present invention can be used alternately through the cooperation of the lifting rod and the connecting rod.

[0020] (3) The water outlet mechanism described in the present invention includes water outlet ends fixed at equal intervals on the bottom end of the water outlet pipe and a limit cover with a sealing sleeve arranged on the outside of the water outlet end. Each of the water outlet ends is a hose body with one end connected to the inside of the water outlet pipe and the other end being a sealed end. The sealed end of the hose body is evenly provided with water outlet holes. When the spray device is started, since the hose body is relatively soft, when water is sprayed out through the hose body, the hose body will swing within the range of the limit cover. During the rotation of the sample tray, the water sprayed by the spray device is sprayed more evenly on the sample to be tested, thereby reducing the experimental error and improving the experimental accuracy.

[0021] (4) Place the sample to be tested in the sample tray, then start the control switch group, and the temperature-controlled aging box starts to heat the interior of the upper chamber. When the temperature in the upper chamber reaches the preset value, the heating is stopped (during the experiment, when the ambient temperature sensor detects that the temperature inside the upper chamber exceeds the preset value, the ambient temperature sensor converts the detected signal into an electrical signal and transmits it to the controller. The controller controls the fan to work. At this time, the electric switch valve is energized to open the air outlet. Under the action of the fan, the interior of the upper chamber is cooled. When the temperature in the upper chamber drops to the preset value, it stops working. At this time, the electric switch valve is de-energized and the air outlet is closed. The sample tray is driven to rotate (the sample tray rotates alternately clockwise and counterclockwise) by the action of the forward and reverse motors. During the rotation of the sample tray, the sample to be tested can be evenly irradiated by the high-pressure pump lamp. During the rotation of the sample tray driven by the forward and reverse motors, the driving rod is driven to rotate with the cooperation of the transmission sprocket and the transmission chain. During the rotation of the driving rod, the lead screw is driven to rotate through the cooperation of the driving gear and the driven gear. While the lead screw is rotating, it drives the two sliders and the rolling rollers fixed on the two sliders to rotate, thereby realizing the application of load force to the sample to be tested.

[0022] (5) The present invention uses a design in which the receiving fringes move when the laser propagates in the optical fiber and is affected by temperature and pressure changes. The temperature of the experimental device is controlled by a temperature-controlled aging box and a temperature sensor. The load is applied by a rolling mechanism. The temperature change of the test sample under the load is detected by the optical fiber temperature sensor. The present invention has a reasonable design, a simple structure, is easy to use, and has high test accuracy.

[0023] (6) The present invention is suitable for simulating the damage to asphalt pavement caused by ultraviolet radiation, large temperature difference between day and night, and load in high-altitude and cold areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural cross-sectional view of the present invention;

[0026] Figure 3 for Figure 1 The structural cross-section view at A in the middle;

[0027] Figure 4 for Figure 1 A schematic diagram of the structure enlarged at B in the middle;

[0028] Figure 5 for Figure 2 A schematic diagram of the structure enlarged at C in the middle;

[0029] Figure 6 This is the installation diagram of the rolling mechanism.

[0030] In the figure: 1, temperature-controlled aging box; 101, insulation layer; 2, sample tray; 31, right fixed plate; 32, left fixed plate; 4, sample to be tested; 5, optical fiber temperature sensor; 61, screw rod; 62, slider; 63, rolling roller; 64, driven gear; 65, driving gear; 66, driving rod; 67, transmission sprocket; 68, transmission chain; 7, water inlet pipe; 8, high-pressure pump lamp; 9, electric switch valve; 10, lamp holder; 11, sunlight device; 111, adjustment rod; 112, adjustment sleeve; 11 3. Sealing ring; 12. Adjusting gear; 13. Connecting rod; 14. Fan; 15. Guide support rod; 16. Reflective lamp cover; 17. Water seepage hole; 18. Forward and reverse motor; 19. Water pump; 20. Laser; 21. Coupler; 22. Spraying device; 221. Water outlet pipe; 222. Corrugated hose; 223. Connecting spring; 224. Water outlet; 225. Limit cover; 23. Ambient temperature sensor; 24. Door switch; 25. Controller; 26. Control switch group; 27. Display screen. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-6 An embodiment of the present invention is as follows: a simulation experiment device for asphalt aging process, comprising a temperature-controlled aging box 1 and an aging simulation device arranged in the temperature-controlled aging box 1 (in this embodiment, the temperature-controlled aging box 1 is a box with a temperature control function with a heating resistance wire at the bottom of the upper chamber, which is used to simulate the temperature difference between day and night. The temperature-controlled aging box 1 can also use other heating methods such as a compressor. It is a mature existing technology, so it will not be repeated here). The temperature-controlled aging box 1 is provided with an upper chamber and a lower chamber, and the upper chamber is hinged with a switch door 24. The lower chamber is also provided with a power chamber and a water storage chamber on the left and right sides of the power chamber. An environmental temperature sensor 23 for detecting the internal temperature of the entire chamber is fixed at the top end of the upper chamber. A control switch group 26, a display screen 27 and a controller 25 electrically connected to all electronic devices are provided on the outer side walls of the lower chamber. A transparent material is connected to the upper chamber for horizontal rotation. A sample tray 2 is provided, and a sample to be tested 4 is arranged in the sample tray 2, and a temperature-pressure dual-parameter all-fiber sensor 5 is arranged horizontally above the inside of the sample to be tested 4, and a right fixing plate 31 and a left fixing plate 32 of an "L"-shaped structure are respectively fixed to the outer walls on the left and right sides of the sample to be tested 4, and a rolling mechanism is arranged between the two right fixing plates 31 and the left fixing plates 32, a coupler 21 is fixed to the left side of the sample tray 2, and a laser 20 adapted to the coupler 21 is fixed to the side of the left fixing plate 32 close to the sample tray 2, the output end of the laser 20 corresponds to the input end of the coupler 21, and the laser beam emitted by the coupler 21 is incident on the fiber optic temperature sensor 5, the output end of the fiber optic sensor 5 is connected to the spectrometer through data transmission, and the spectrometer is electrically connected to the controller 25, the fiber optic sensor 5 outputs the received optical signal to the spectrometer, and the spectrometer converts the optical signal into an electrical signal and then into a digital signal and outputs it to the controller 25;

[0033] The rolling mechanism includes a screw rod 61 located above the sample tray 2 and parallel to the bottom end surface of the sample tray 2, a pair of sliders 62 sleeved on the screw rod 61 and slidably connected to the screw rod 61, a rolling roller 63 fixed to the bottom end of each slider 62 and used to roll the sample 4 to be tested, and a driving mechanism for driving the screw rod 61 to rotate;

[0034] The aging simulation device includes a sunlight device 11 and a spray device 22, and the sunlight device 11 includes a lifting rod vertically penetrating the upper end of the upper chamber, a reflective lampshade 16 fixed to the bottom end of the lifting rod, a lamp holder 10 fixed in the reflective lampshade 16 and slidably connected to the inner wall of the reflective lampshade 16 along the vertical direction, and a high-pressure pump lamp 8 uniformly fixed to the bottom end of the lamp holder 10, and water seepage holes 17 are uniformly opened at the position of the bottom end of the upper chamber facing the water storage chamber;

[0035] The spray device 22 includes a water pump 19 fixed in the water storage chamber, a water inlet pipe 7 respectively embedded in the left and right side walls of the temperature-controlled aging box 1 and connected to the corresponding water pump 19, two water outlet pipes 221 horizontally located on the left and right sides above the upper chamber and symmetrical about the lifting rod, and water outlet mechanisms equidistantly distributed on the bottom end surface of each water outlet pipe 221, and the ends of the two water outlet pipes 221 close to the lifting rod are both sealed ends, and the upper end of each water outlet pipe 221 is vertically fixed with a guide support rod 15 that is slidably connected to the inner wall of the top end of the upper chamber along a direction parallel to the water outlet pipe 221, each guide support rod 15 is hinged to the side wall of the lifting rod through a connecting rod 13, and the end of each water outlet pipe 221 away from the lifting rod is connected to the corresponding water inlet pipe 7 through a corrugated hose 222, and a connecting spring 223 is sleeved on the outer side of the corrugated hose 222, one end of the connecting spring 223 is connected to the water outlet pipe 221, and the other end is connected to the side wall in the upper chamber.

[0036] Furthermore, the inner wall of the upper chamber is provided with a heat-insulating layer 101, and the heat-insulating layer 101 is made of a sponge material to prevent the temperature-controlled aging box 1 from losing heat during the heating process.

[0037] Furthermore, a fan 14 is fixed to the top of the temperature-controlled aging box 1, and the output end of the fan 14 is connected to the interior of the upper chamber. An air outlet is also provided at the top of the temperature-controlled aging box 1, and an electric switch valve 9 is provided on the air outlet. When the internal temperature of the temperature-controlled aging box 1 exceeds a preset value, the fan 14 and the electric switch valve 9 are energized, and the air outlet is opened at the same time. After the fan 14 is energized, it starts to suck outside air into the temperature-controlled aging box 1 and, with the cooperation of the air outlet, forms an airflow inside the temperature-controlled aging box 1, so that the gas inside the temperature-controlled aging box 1 is discharged from the air outlet. Therefore, under the action of the fan 14, the internal environment of the temperature-controlled aging box 1 is quickly cooled down.

[0038] Further, the driving mechanism includes a forward and reverse motor 18 fixed in the power chamber and having an output shaft perpendicular to the screw 61, a driving rod 66 penetrating the right fixed plate 31 through a bearing and perpendicular to the screw 61, a driving gear 65 fixed to the top of the driving rod 66, and a driven gear 64 fixed to the screw 61 and matched with the driving gear 65, and the output shaft of the forward and reverse motor 18 extends through the power chamber into the upper chamber and is fixed at the bottom center of the sample tray 2, and the upper end of the output shaft of the forward and reverse motor 18 is located at a position in the upper chamber and A transmission sprocket 67 is fixed to the bottom end of the driving rod 66, and the two transmission sprockets 67 are connected by a transmission chain 68. When the forward and reverse motor 18 drives the sample tray 2 to rotate, with the cooperation of the driving rod 66, the active gear 65, the driven gear 64, the transmission sprocket 67 and the transmission chain 68, the screw rod 61 rotates and drives the two sliders 62 located thereon to move horizontally left and right along the screw rod 61, so as to drive the two rolling rollers 63 to move, so that the two rolling rollers 63 repeatedly roll the test sample 4.

[0039] Furthermore, the lifting rod includes an adjusting sleeve 112 that is slidably connected to a through hole vertically opened at the top of the upper chamber, an adjusting rod 111 that is sleeved in the adjusting sleeve 112 and threadedly connected to the inner wall of the adjusting sleeve 112, and a power mechanism for driving the adjusting sleeve 112 to rise and fall, and the bottom end of the adjusting rod 111 passes through the adjusting sleeve 112 and extends into the reflective lampshade 16 to be connected to the bottom end of the lamp holder 10, and the top end of the adjusting rod 111 passes through the upper end of the adjusting sleeve 112 and is fixed with a rotating handle.

[0040] Furthermore, the power mechanism includes an adjusting gear 12 fixed on the top of the temperature-controlled aging box 1, and the adjusting gear 12 cooperates with a rack arranged on the upper side wall of the adjusting sleeve 112, and a reduction motor can be fixed on the rotating shaft of the adjusting gear 12, and the reduction motor drives the adjusting gear 12 to rotate to drive the adjusting sleeve 112 to rise and fall, thereby driving the sunlight device 11 to rise and fall.

[0041] Furthermore, a sealing ring 113 is provided on the inner wall of the bottom end of the through hole to prevent the hot air inside the upper chamber from escaping from the through hole.

[0042] Furthermore, the water outlet mechanism includes water outlet ends 224 fixed at equal intervals on the bottom end of the water outlet pipe 221 and a limiting cover 225 sealed on the outside of the water outlet end 224. Each of the water outlet ends 224 is a hose body having one end connected to the inside of the water outlet pipe 221 and the other end being a sealed end. The sealed end of the hose body is evenly provided with water outlet holes. When the spray device 22 is started, since the hose body is relatively soft, when water is sprayed out through the hose body, the hose body will swing within the range of the limiting cover 225. During the rotation of the sample tray 2, the water sprayed by the spray device 22 is more evenly sprayed on the sample 4 to be tested.

[0043] Working principle: turn on the external power supply, put the sample 4 to be tested in the sample tray 2, and then start the control switch group 26, the temperature-controlled aging box 1 starts to heat the interior of the upper chamber, and when the temperature in the upper chamber reaches the preset value, the heating is stopped (in the experiment, when the ambient temperature sensor 23 detects that the temperature inside the upper chamber exceeds the preset value, the ambient temperature sensor 23 converts the detected signal into an electrical signal and transmits it to the controller 25, and the controller 25 controls the fan 14 to work. At this time, the electric switch valve 9 is energized to open the air outlet. Under the action of the fan 14, the interior of the upper chamber is cooled down. When the temperature in the upper chamber drops to the preset value, it stops working. At this time, the electric switch valve 9 is powered off and the air outlet is closed). Then Start the forward and reverse motor 18, and under the action of the forward and reverse motor 18, drive the sample tray 2 to rotate (the sample tray 2 rotates alternately clockwise and counterclockwise). During the rotation of the sample tray 2, the test sample 4 can be evenly irradiated by the high-pressure pump lamp 8. During the rotation of the sample tray 2 driven by the forward and reverse motor 18, the driving rod 66 is driven to rotate with the cooperation of the transmission sprocket 67 and the transmission chain 68. During the rotation of the driving rod 66, the screw rod 61 is driven to rotate through the cooperation of the driving gear 65 and the driven gear 64. The screw rod 61 drives the two sliders 62 and the rolling roller 63 fixed on the two sliders 62 to rotate while rotating, thereby realizing the rolling operation on the surface of the test sample 4.

[0044] When the test sample 4 is subjected to simulated sunlight, (the initial position of the sunlight device 11 is as follows Figure 2 ), start the reduction motor to drive the adjusting gear 12 to rotate and drive the adjusting sleeve 112 to descend. During the process of the adjusting sleeve 112 descending, the connecting rod 13 pushes the water outlet pipe 221 in the process of changing from an inclined state to a horizontal state. Under the action of the guide support rod 15, the water outlet pipe 221 approaches the side wall of the upper chamber in a horizontal direction while squeezing the corrugated hose 222 and the connecting spring 223. When the two water outlet pipes 221 move to the left and right sides of the reflective lampshade 16, stop rotating the adjusting gear 12. According to the experimental requirements, the lamp holder 10 is rotated to drive the high-pressure pump lamp 8 to slide longitudinally along the inner wall of the reflective lampshade 16 to adjust the height of the high-pressure pump lamp 8 to meet the experimental requirements.

[0045] When simulating precipitation on the test sample 4 (since there is no sunshine in rainy weather, the high-pressure pump lamp 8 needs to be turned off), the reduction motor is started to drive the adjusting gear 12 to rotate in the opposite direction so that the adjusting sleeve 112 drives the sunlight device 11 to rise. In the process of the adjusting sleeve 112 rising, the connecting rod 13 pulls the water outlet pipe 221 and moves along the straight line where the adjusting sleeve 112 is located under the action of the guide support rod 15. When the two water outlet pipes 221 are in contact, stop rotating the adjusting gear 12, and then you can rotate the rotating handle so that the adjusting rod 111 drives the lamp holder 10 and the high-pressure pump lamp 8 to rise along the reflective lampshade 16 to prevent water droplets from entering the reflective lampshade 16 and wetting the high-pressure pump lamp 8 during the spraying process. After the above operations are completed, the water pump 19 is started. Under the action of the water pump 19, the water stored in the water tank passes through the water inlet pipe 7 and the corrugated hose 222 in sequence into the water outlet pipe 221, and is then sprayed onto the sample 4 to be tested from the water outlet end 224. Since each of the water outlet ends 224 is a hose body with one end connected to the inside of the water outlet pipe 221 and the other end being a sealed end, the sealed end of the hose body is evenly provided with water outlet holes. When the spray device 22 is started, since the hose body is relatively soft, when water is sprayed out through the hose body, the hose body will swing within the range of the limit cover 225. During the rotation of the sample tray 2, the water sprayed by the spray device 22 is more evenly sprayed on the sample 4 to be tested, thereby reducing the experimental error and improving the accuracy of the experimental data. The water spilled from the sample tray 2 flows back into the water storage chamber through the seepage hole 17 for recycling, which is beneficial to saving resources.

[0046] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simulation experiment device for asphalt aging process, comprising a temperature-controlled aging box (1) and an aging simulation device arranged in the temperature-controlled aging box (1), wherein the temperature-controlled aging box (1) is provided with an upper chamber and a lower chamber, and the upper chamber is hinged with a switch door (24), and the lower chamber is also provided with a power chamber and water storage chambers located on the left and right sides of the power chamber, respectively, an environmental temperature sensor (23) for detecting the temperature inside the entire chamber is fixed on the top of the upper chamber, and a control switch group (26), a display screen (27) and a controller (25) electrically connected to all electronic devices are respectively provided on the outer side wall of the lower chamber, characterized in that: A sample tray (2) made of a transparent material is horizontally rotatably connected in the upper chamber, and a sample to be tested (4) is arranged in the sample tray (2). A temperature-pressure dual-parameter all-fiber sensor (5) is horizontally arranged above the sample to be tested (4). A right fixing plate (31) and a left fixing plate (32) of an "L"-shaped structure are respectively fixed to the outer walls on the left and right sides of the sample to be tested (4), and a rolling mechanism is arranged between the two right fixing plates (31) and the left fixing plates (32). A coupler (21) is fixed to the left side of the sample tray (2), and a laser (20) adapted to the coupler (21) is fixed to the side of the left fixing plate (32) close to the sample tray (2); The rolling mechanism comprises a screw (61) located above the sample tray (2) and parallel to the bottom end surface of the sample tray (2), a pair of sliders (62) sleeved on the screw (61) and slidably connected to the screw (61), a rolling roller (63) fixed to the bottom end of each slider (62) and used for rolling the sample to be tested (4), and a driving mechanism for driving the screw (61) to rotate; The aging simulation device comprises a sunlight device (11), a temperature control device and a spray device (22), and the sunlight device (11) comprises a lifting rod vertically penetrating the upper end of the upper chamber, a reflective lampshade (16) fixed on the bottom end of the lifting rod, a lamp holder (10) fixed in the reflective lampshade (16) and connected to the inner wall of the reflective lampshade (16) in a vertical sliding direction, and a high-pressure pump lamp (8) uniformly fixed on the bottom end of the lamp holder (10), and water seepage holes (17) are uniformly opened at a position of the bottom end of the upper chamber directly facing the water storage chamber; The spray device (22) comprises a water pump (19) fixed in the water storage chamber, a water inlet pipe (7) respectively embedded in the left and right side walls of the temperature-controlled aging box (1) and connected to the corresponding water pump (19), two water outlet pipes (221) horizontally located on the left and right sides above the upper chamber and symmetrical about the lifting rod, and water outlet mechanisms distributed at equal intervals on the bottom end surface of each water outlet pipe (221), and the ends of the two water outlet pipes (221) close to the lifting rod are both sealed ends, and the upper end of each water outlet pipe (221) is vertically fixed with a sealing member connected to the upper chamber. A guide support rod (15) is slidably connected to the inner wall of the top end of the chamber in a direction parallel to the water outlet pipe (221), each guide support rod (15) is hinged on the side wall of the lifting rod through a connecting rod (13), and one end of each water outlet pipe (221) away from the lifting rod is connected to the corresponding water inlet pipe (7) through a corrugated hose (222), and a connecting spring (223) is sleeved on the outer side of the corrugated hose (222), one end of the connecting spring (223) is connected to the water outlet pipe (221), and the other end is connected to the side wall in the upper chamber; The driving mechanism comprises a forward and reverse motor (18) fixed in the power chamber and having an output shaft perpendicular to the screw (61), a driving rod (66) penetrating the right fixed plate (31) through a bearing and perpendicular to the screw (61), a driving gear (65) fixed on the top of the driving rod (66), and a driven gear (64) fixed on the screw (61) and matched with the driving gear (65), and the output shaft of the forward and reverse motor (18) extends through the power chamber into the upper chamber and is fixed at the bottom center of the sample tray (2), and a transmission sprocket (67) is fixed at the upper end of the output shaft of the forward and reverse motor (18) located in the upper chamber and at the bottom end of the driving rod (66), and the two transmission sprockets (67) are connected by a transmission chain (68); The lifting rod comprises an adjusting sleeve (112) slidably connected to a through hole vertically opened at the top of the upper chamber, an adjusting rod (111) sleeved in the adjusting sleeve (112) and threadedly connected to the inner wall of the adjusting sleeve (112), and a power mechanism for driving the adjusting sleeve (112) to move up and down, wherein the bottom end of the adjusting rod (111) passes through the adjusting sleeve (112) and extends into the reflective lampshade (16) to be connected to the bottom end of the lamp holder (10), and the top end of the adjusting rod (111) passes through the upper end of the adjusting sleeve (112) and is fixed with a rotating handle.

2. The simulation experimental device for asphalt aging process according to claim 1, characterized in that: The inner wall of the upper chamber is provided with a heat-insulating layer (101), and the heat-insulating layer (101) is made of sponge material.

3. The simulation experimental device for asphalt aging process according to claim 1, characterized in that: A fan (14) is fixed at the top of the temperature-controlled aging box (1), and the output end of the fan (14) is connected to the interior of the upper chamber. An air outlet is also provided at the top of the temperature-controlled aging box (1), and an electric switch valve (9) is provided on the air outlet.

4. The simulation experimental device for asphalt aging process according to claim 1, characterized in that: The power mechanism comprises an adjusting gear (12) fixed on the top of the temperature-controlled aging box (1), and the adjusting gear (12) cooperates with a rack arranged on the upper side wall of the adjusting sleeve (112), and a reduction motor can be fixed on the rotating shaft of the adjusting gear (12).

5. The simulation experimental device for asphalt aging process according to claim 1, characterized in that: A sealing ring (113) is provided on the inner wall of the bottom end of the through hole.

6. The simulation experimental device for asphalt aging process according to claim 1, characterized in that: The water outlet mechanism comprises water outlet ends (224) fixed at equal intervals on the bottom end of the water outlet pipe (221) and a limit cover (225) with a sealing sleeve arranged outside the water outlet end (224); each of the water outlet ends (224) has one end connected to the inside of the water outlet pipe (221) and the other end is a flexible hose body with a sealed end, and the sealed end of the flexible hose body is evenly provided with water outlet holes.

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