Wheel rolling device for testing anti-freezing performance of asphalt pavement

Abstract

The utility model provides a wheel rolling device for testing the anti-freezing performance of an asphalt pavement. The device comprises a base, a heat preservation box is arranged above the base, and a telescopic part is arranged in the heat preservation box; the telescopic part is connected with a test part; a temperature regulator is arranged at the bottom of the test part; a motor and a sliding rail part are arranged at the top of the heat preservation box; limiting stoppers are arranged on the two sides of the sliding rail part, and a sliding table is arranged on the limiting stoppers. The bottom of the sliding table is connected with a hydraulic dowel bar; the hydraulic dowel bar is connected with the elastic bearing plate and the rolling part, and an oil cylinder supplies oil to generate pressure; the motor is connected with a control part through a cable; the control part comprises a sliding control part, a parameter control part and a telescopic rod adjusting control part. The device simulates the influence on the asphalt pavement under different environmental factors and traffic conditions by controlling the temperature during the test, the gradient of the test piece and the pressure applied to the test piece, and further evaluates the anti-freezing performance of the asphalt pavement more comprehensively.

Description

Technical Field

[0001] The utility model belongs to the field of detection equipment used in road construction projects, in particular to a wheel rolling device for testing the anti-icing performance of asphalt pavement. Background Art

[0002] Due to the complex topography, climate humidity, and crisscrossing water systems, more than half of my country's territory is subject to ice, snow, freezing rain, and low temperatures from winter to early spring every year. If the ice, snow, and freezing rain on the road surface are not dealt with in a timely manner, the road surface will be frozen. The icing of the road surface will greatly reduce the friction coefficient of the road surface, and the probability of traffic accidents will increase exponentially, causing many casualties and economic losses to my country every year. Therefore, anti-icing performance is a very important indicator in the selection and design of asphalt pavement materials.

[0003] At present, in order to improve the anti-icing performance of asphalt pavements, scholars from various countries have developed a variety of active pavement ice and snow removal methods, which can be roughly divided into four categories: thermal ice and snow melting method, salt storage pavement material deicing method, elastic pavement material deicing method and surface coating material deicing method. Although a variety of active ice and snow removal methods have been developed, there is no test equipment that can well simulate the impact of real traffic and temperature environment on asphalt pavements, and it is impossible to comprehensively evaluate the anti-icing performance of asphalt pavements using different active deicing methods.

[0004] Chinese patent publication number CN216117414U, published on March 22, 2022, discloses a low-temperature pavement anti-icing simulation test device. This device simulates various pavement icing conditions by controlling environmental factors such as humidity and temperature within a test chamber. It then analyzes the icing process on the surface of test specimens to evaluate the performance of anti-icing materials. However, this method ignores the impact of vehicle load on pavement icing, presents certain limitations, and is not suitable for evaluating the anti-icing performance of elastic pavement materials and surface coatings.

[0005] Chinese patent publication number CN209656534U, published on March 19, 2019, discloses a device for testing the anti-icing performance of asphalt pavements by simulating dynamic loads. This device uses a striking mechanism and a rotary motion mechanism to simulate the vertical forces acting on asphalt pavement under driving conditions. The device then determines the anti-icing performance of the asphalt pavement based on the ratio of the ice-crushed area to the total area. However, this method ignores the effects of environmental factors and horizontal forces on the asphalt pavement, and cannot effectively simulate the effects of temperature and vehicle load on the anti-icing performance of asphalt pavements. Utility Model Content

[0006] In order to solve the above technical problems, the utility model proposes a wheel rolling device for testing the anti-icing performance of asphalt pavement. By controlling the ambient temperature during the test and the pressure acting on the test specimen, the vehicle load on the asphalt pavement under different environmental and traffic conditions is simulated, thereby comprehensively evaluating the anti-icing performance of the asphalt pavement.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A wheel rolling device for testing the anti-icing performance of asphalt pavement includes a base, a telescopic part, a test part, a thermostat, an oil cylinder, a slide rail part, a limiter, a motor, a slide, a hydraulic force transmission rod, an elastic bearing plate, a rolling part, an insulation box and a control part. The wheel rolling device is provided with a base, an insulation box is provided above the base, a telescopic part is provided in the insulation box, the telescopic part is connected with the test part, a thermostat is provided at the bottom center of the test part, a motor is provided on the outer side of the top of the insulation box, a slide rail part is provided on the inner side of the top of the insulation box, limiters are provided on both sides of the slide rail part, and a slide is placed on the slide rail part, a hydraulic force transmission rod is connected to the bottom of the slide, the hydraulic force transmission rod is connected to the elastic bearing plate and the rolling part, and an oil cylinder supplies oil to generate pressure for it, the motor is connected to the control part through a cable, and the control part includes a sliding control part, a parameter control part and a telescopic rod adjustment control part.

[0009] Furthermore, the telescopic part has at least one pair, consisting of a telescopic rod and a connecting buffer, the connecting buffer is installed on the telescopic rod, the length of the telescopic rod can be controlled by the telescopic rod adjustment control part, thereby controlling the height and inclination of the test specimen, simulating the driving conditions of the vehicle on flat ground and uphill and downhill, the connecting buffer is rotatable, and can rotate to the same angle as the bottom surface of the test part as the telescopic rod rises and falls, thereby ensuring a stable connection between the test part and the telescopic part.

[0010] Furthermore, the test section consists of a test bench, a specimen fixing bar and a test specimen. The test specimen is fixed on the test bench by the specimen fixing bar. A thermostat is installed in the center of the bottom of the test bench, which can be used to control the temperature inside the insulation box.

[0011] Furthermore, the slide rail portion includes a transverse slide rail and a vertical slide rail. Both ends of the transverse slide rail are in the guide rails of the vertical slide rail. The transverse slide rail enables the slide and the rolling part to slide transversely, and the vertical slide rail enables the slide and the rolling part to slide vertically. Limiters are installed on both sides of the transverse slide rail to limit the sliding range of the slide.

[0012] Furthermore, a shock-absorbing spring is provided inside the elastic bearing plate, the top and bottom of the shell are made of iron plates or steel plates, and the side parts of the shell are made of rubber skin to simulate the effect of a vehicle shock absorber.

[0013] Furthermore, the rolling part includes a rubber wheel and a wheel frame, and the rubber wheel is connected to the elastic bearing plate through the wheel frame.

[0014] Furthermore, the sliding control unit is composed of a slide lifting console and a slide sliding console. The slide lifting console can control the height of the rubber wheel, and the slide sliding console can control the start and stop of the test.

[0015] Furthermore, the parameter control unit includes a pressure control console, a speed control console and a temperature control console. The pressure control console can adjust the pressure when the rubber wheel is rolling, the speed control console can adjust the speed of the rubber wheel moving left and right, and the temperature control console can adjust the temperature of the thermostat, thereby controlling the temperature inside the insulation box.

[0016] Furthermore, the front part of the thermal insulation box is a glass sealed door that can only be opened from the outside, and a low-temperature resistant lighting lamp is provided on the inner side of the top.

[0017] The utility model provides a wheel rolling device for testing the anti-icing performance of asphalt pavement. Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0018] The utility model can simulate the anti-icing performance of an asphalt pavement under different driving conditions by rotating the test part; can simulate the effect of vehicle tires on the asphalt pavement under actual driving conditions by using rubber tires to transmit force to the test specimen; can control the pressure transmitted to the test specimen by the rubber tire by adjusting the pressure of the force transmission rod to simulate the vehicle load on the asphalt pavement under different traffic conditions; can simulate the ambient temperature when the road surface is frozen by controlling the temperature in the insulation box by controlling the thermostat; the device takes comprehensive factors into consideration and has wide applicability, and can be used to test the anti-icing performance of various road materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the testing device of the utility model;

[0020] Figure 2 It is a structural diagram of the base and the thermal insulation box of the utility model.

[0021] Among them are:

[0022] 1. Base; 2. Telescopic part; 201. Telescopic rod; 202. Connecting buffer; 3. Test part; 301. Test bench; 302. Test piece fixing strip; 303. Test piece; 4. Thermostat; 5. Cylinder; 6. Slide rail part; 601. Horizontal slide rail; 602. Vertical slide rail; 7. Limiter; 8. Motor; 9. Slide; 10. Hydraulic force transmission rod; 11. Elastic bearing plate; 12. Rolling part; 1201. Wheel frame; 1202. Rubber wheel; 13. Sliding control part; 1301. Slide lifting console; 1302 Slide sliding console; 14. Parameter control part; 1401. Pressure console; 1402. Speed console; 1403. Temperature console; 15. Telescopic rod adjustment control part; 16. Insulation box. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] like Figure 1 and Figure 2 As shown, the utility model discloses a wheel rolling device for testing the anti-icing performance of asphalt pavement; the device includes a base 1, a telescopic part 2, a test part 3, a thermostat 4, a cylinder 5, a slide rail part 6, a limiter 7, a motor 8, a slide 9, a hydraulic force transmission rod 10, an elastic bearing plate 11, a rolling part 12, a sliding control part 13, a parameter control part 14, a telescopic rod adjustment control part 15, and an insulation box 16.

[0025] like Figure 1 and Figure 2As shown, an insulated box 16 is provided above the base 1, and the front part of the insulated box 16 is a glass sealed door that can only be opened from the outside, and low-temperature resistant lighting lamps are evenly provided on the inner side of the top to prevent the light source from being completely blocked as the slide 9 moves during the test or the low-temperature lighting lamps from being crushed as the slide 9 rises; the telescopic part 2 is provided in the insulated box, and is composed of a telescopic rod 201 and a connecting buffer 202. The length of the telescopic rod 201 can be controlled by the telescopic rod adjustment control part 15, thereby controlling the height and inclination of the test specimen 303 to simulate the driving conditions of the vehicle on flat ground and uphill and downhill, and the connecting buffer 202 is rotatable and can move with the rise of the telescopic rod 201 and descend and rotate to the same angle as the bottom surface of the test part 3 to ensure a stable connection between the test part 3 and the telescopic part 2; the test part 3 is set on the top of the telescopic part 2 through the connection of the buffer member 202, and the test part 3 is composed of a test bench 301, a specimen fixing bar 302 and a test specimen 303. The specimen fixing bar 302 uses two bolts to fix the test specimen 303, and the test bench 301 is used to place the test specimen 303. In addition, the height of the enclosure of the test bench 301 is slightly lower than the thickness of the test specimen 303 to prevent the rubber wheel 1202 from pressing on the enclosure of the test bench 301 during the test; the thermostat 4 is set at the bottom center of the test bench 301 and can be controlled by the temperature control console 14 03 adjusts the temperature of the thermostat 4, thereby controlling the temperature in the insulation box 16; the slide rail portion 6 is arranged on the upper inner side of the insulation box 16, and the slide rail portion 6 includes a horizontal slide rail 601 and a vertical slide rail 602, which can respectively make the slide 9 and the rolling part 12 slide horizontally and vertically. In addition, limiters 7 are installed on both sides of the horizontal slide rail 601 to limit the sliding range of the slide 9 and prevent the rubber wheel 1202 from rolling out of the test range; the motor 8 is arranged on the top outer side of the insulation box 16, serving as the center of the power system of the test device, and is connected to the control part through a cable to transmit the control signal of the control part; the slide 9 is arranged on the horizontal slide rail 601 of the slide rail portion 6, and is moved on the horizontal slide rail 601 through the pulley inside it. 01; the hydraulic force transmission rod 10 is arranged at the bottom of the slide 9, which is used to transmit the pressure generated by the oil cylinder 5 to the elastic bearing plate 11 and the rolling part 12; the elastic bearing plate 11 is connected to the bottom of the hydraulic force transmission rod 10, and a shock-absorbing spring is arranged inside the elastic bearing plate 11. The top and bottom of the outer shell are composed of iron plates or steel plates, and the side parts of the outer shell are composed of rubber skin, which can simulate the effect of the vehicle shock absorber; the rolling part 12 is connected to the bottom of the elastic bearing plate 11, including a rubber wheel 1202 and a wheel frame 1201, and the rubber wheel 1202 is connected to the elastic bearing plate 11 through the wheel frame 1201; in addition, the above-mentioned fixed connection method can be bolted or riveted.

[0026] The device also includes a control unit, which is connected to the motor 8 through a cable and is used to control various test parameters and the start and end of the test. The control unit includes a sliding control unit 13, a parameter control unit 14 and a telescopic rod adjustment control unit 15; the sliding control unit 13 is composed of a slide lifting console 1301 and a slide sliding console 1302. The slide lifting console 1301 can control the height of the rubber wheel 1202 by controlling the horizontal slide rail 601 to move on the vertical slide rail 602, and the slide sliding console 1302 can control the start and stop of the test; the parameter control unit 14 includes a pressure The control console 1401, the speed control console 1402 and the temperature control console 1403, the pressure control console 1401 can adjust the pressure of the rubber wheel 1202 when rolling, the speed control console 1402 can adjust the speed of the rubber wheel 1202 moving left and right, and the temperature control console 1403 can adjust the temperature of the thermostat 4, thereby controlling the temperature inside the insulation box 16; the telescopic rod adjustment control unit 15 can control the inclination of the test part 3 by controlling the height of the two telescopic rods 201 respectively, thereby simulating flat ground and uphill and downhill road conditions, so that the device can more comprehensively evaluate the anti-icing performance of the road surface.

[0027] The specific operation process of this utility model is:

[0028] The rutting plate specimen after asphalt molding is used as the test specimen 303, and the mass of the test specimen 303 before ice coating is obtained by weighing it. v , then seal the upper surface of test specimen 303 with foam sponge tape to form a water barrier. Pour an appropriate amount of clean water onto test specimen 303, then freeze it in a -10°C refrigerator for 6 hours to form a 10mm thick layer of ice on the surface of test specimen 303. Then remove the foam sponge barrier and weigh test specimen 303 to obtain the mass m0 of test specimen 303 after its surface is fully covered with ice.

[0029] While freezing the test specimen 303, first raise the height of the rubber wheel 1202 through the slide lifting console 1301 to prevent the rubber wheel 1202 from being too low and affecting the subsequent operations. Then, move the slide 9 to the rightmost side of the range of motion limited by the limiter 7 through the slide sliding console 1302. Then, adjust the length of the telescopic rod 201 through the telescopic rod adjustment part 15 to keep the test bench 301 horizontal. Finally, control the temperature of the thermostat 4 through the temperature console 1403 to keep the temperature in the insulation box 16 at -1°C, and arrange the test environment in the insulation box 16 in advance.

[0030] After the test environment in the insulated box 16 is arranged and the test specimen 303 is completely frozen, the test specimen 303 is placed in the test bench 301 and the specimen fixing strip 302 is tightened to fix the test specimen 303. Then, the height of the rubber wheel 1202 is controlled by the slide lifting console 1301 so that the bottom of the rubber wheel 1202 just contacts the surface of the ice layer on the top of the test specimen 303. Then, the pressure of the rubber wheel 1202 on the test specimen 303 and the moving speed of the rubber wheel 1202 are adjusted respectively by the pressure console 1401 and the speed console 1402. Then, the rubber wheel 1202 starts to move by the slide sliding console 1302. After the rubber wheel 1202 rolls back and forth once, the broken part of the ice layer on the top of the test specimen 303 is cleaned and the mass m1 of the broken ice layer is weighed. Then, the rubber wheel 1202 is repeatedly rolled back and forth 15 to 20 times and the mass m of the broken ice layer after each rolling is weighed and recorded. n Finally, according to the ice breakage rate of the top surface of the test specimen 303 The anti-icing performance of asphalt pavement is evaluated based on the changes in

[0031] The above description is merely a preferred embodiment of the present invention and does not constitute any other limitation to the present invention. Any modification or equivalent variation based on the technical essence of the present invention shall still fall within the scope of protection claimed by the present invention.

Claims

1. A wheel rolling device for testing the anti-icing performance of an asphalt pavement, comprising a base (1), a telescopic portion (2), a test portion (3), a thermostat (4), an oil cylinder (5), a slide rail portion (6), a stopper (7), a motor (8), a slide (9), a hydraulic force transmission rod (10), an elastic bearing plate (11), a rolling portion (12), a heat preservation box (16) and a control unit, characterized in that: The wheel rolling device is provided with a base (1), a heat preservation box (16) is provided above the base (1), a telescopic part (2) is provided in the heat preservation box (16), a test part (3) is connected to the telescopic part (2), a thermostat (4) is provided at the center of the bottom of the test part (3), a motor (8) is provided on the outer side of the top of the heat preservation box (16), a slide rail part (6) is provided on the inner side of the top of the heat preservation box (16), limiters (7) are provided on both sides of the slide rail part (6), and a slide (9) is placed on the slide rail part (6), a hydraulic force transmission rod (10) is connected to the bottom of the slide (9), the hydraulic force transmission rod (10) is connected to the elastic bearing plate (11) and the rolling part (12), and an oil cylinder (5) is provided to supply oil to generate pressure for it, the motor (8) is connected to the control part through a cable, and the control part includes a sliding control part (13), a parameter control part (14) and a telescopic rod adjustment control part (15).

2. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The telescopic portion (2) has at least one pair, consisting of a telescopic rod (201) and a connecting buffer (202), wherein the connecting buffer (202) is mounted on the telescopic rod (201), and the length of the telescopic rod (201) can be controlled by a telescopic rod adjustment control unit (15), thereby controlling the height and inclination of the test specimen (303), simulating the driving conditions of a vehicle on flat ground and when going up and downhill, and the connecting buffer (202) is rotatable and can rotate to the same angle as the bottom surface of the test portion (3) as the telescopic rod (201) rises and falls, thereby ensuring a stable connection between the test portion (3) and the telescopic portion (2).

3. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The test section (3) is composed of a test bench (301), a specimen fixing bar (302) and a test specimen (303). The test specimen (303) is fixed on the test bench (301) by the specimen fixing bar (302). A thermostat (4) is installed at the center of the bottom of the test bench (301) to control the temperature inside the insulation box (16).

4. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The slide rail portion (6) includes a transverse slide rail (601) and a vertical slide rail (602). Both ends of the transverse slide rail (601) are in the guide rails of the vertical slide rail (602). The transverse slide rail (601) enables the slide platform (9) and the rolling portion (12) to slide transversely, and the vertical slide rail (602) enables the slide platform (9) and the rolling portion (12) to slide vertically. Limiters (7) are installed on both sides of the transverse slide rail (601) to limit the sliding range of the slide platform (9).

5. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: A shock-absorbing spring is provided inside the elastic bearing plate (11), the top and bottom of the shell are made of iron plates or steel plates, and the side parts of the shell are made of rubber skin to simulate the effect of a vehicle shock absorber.

6. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The rolling part (12) comprises a rubber wheel (1202) and a wheel frame (1201), and the rubber wheel (1202) is connected to the elastic bearing plate (11) via the wheel frame (1201).

7. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The sliding control unit (13) is composed of a slide lifting control console (1301) and a slide sliding control console (1302). The slide lifting control console (1301) can control the height of the rubber wheel (1202), and the slide sliding control console (1302) can control the start and stop of the test.

8. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The parameter control unit (14) includes a pressure control console (1401), a speed control console (1402) and a temperature control console (1403). The pressure control console (1401) can adjust the pressure of the rubber wheel (1202) during rolling, the speed control console (1402) can adjust the speed of the rubber wheel (1202) moving left and right, and the temperature control console (1403) can adjust the temperature of the thermostat (4), thereby controlling the temperature inside the insulation box (16).

9. The wheel rolling device for testing the anti-icing performance of asphalt pavement according to claim 1, characterized in that: The front part of the heat preservation box (16) is a glass sealed door that can only be opened from the outside, and a low-temperature resistant lighting lamp is provided on the inside of the top.

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