An asphalt mixture rutting test bench capable of simulating a ramp

Abstract

The utility model relates to bituminous mixture rut test technical field, proposes a kind of bituminous mixture rut test bench of simulating ramp, including box and the test piece gradient adjusting assembly of being located at box bottom, the test piece gradient adjusting assembly top is equipped with test piece groove, test piece groove bottom and is equipped with temperature guide cavity in the periphery, temperature guide cavity periphery is equipped with dust collecting groove;Test piece gradient adjusting assembly bottom both ends are respectively hinged with lifting shaft and rotating shaft;The rotating shaft is fixedly connected with the bottom surface of case, and lifting shaft is driven lifting by shear type elevator;Temperature guide cavity below is equipped with temperature control component;The heat conduction medium circulation loop is formed between temperature guide cavity and temperature control component;Test piece gradient adjusting assembly is driven to realize the stepless regulation of test piece inclination angle by shear type elevator.This device realizes the fast, even heating of test piece by heat conduction medium circulation, greatly shortens test preparation time, and can accurately simulate actual ramp working condition, effectively improves the efficiency and simulation reality of rut test.

Description

Technical Field

[0001] This utility model relates to the field of asphalt mixture rutting test technology, and in particular to an asphalt mixture rutting test bench that can simulate a slope. Background Technology

[0002] High-temperature stability of asphalt mixtures is a crucial performance indicator in road engineering. Existing asphalt mixture rutting tests typically involve placing the specimen in a test chamber, heating it to a standard temperature with hot air, and then repeatedly pressing a test wheel onto the specimen to obtain dynamic stability indicators. This traditional testing method has the following shortcomings: First, the specimen heating method is inefficient. To reach the test temperature of 60°C, the specimen usually needs to be placed in the test equipment and heated continuously for 6 to 12 hours. The long test cycle results in a limited number of tests that can be completed in a day, affecting the testing efficiency.

[0003] Secondly, the test conditions differ from the actual vehicle conditions. Ruts often appear on slopes, while traditional test devices are generally conducted on a horizontal surface, which cannot simulate the stress characteristics when going uphill or downhill.

[0004] Therefore, it is necessary to provide an asphalt mixture rutting test bench that can simulate a slope to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an asphalt mixture rutting test bench that can simulate slopes, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A test bench for rutting asphalt mixtures that can simulate slopes, comprising a test chamber and a specimen slope adjustment assembly located at the bottom of the test chamber; The specimen slope adjustment assembly has a specimen groove at the top, a temperature-conducting cavity at the bottom and around the specimen groove, and a dust collection groove around the temperature-conducting cavity; a lifting shaft and a rotating shaft are respectively hinged at both ends of the bottom of the specimen slope adjustment assembly; the rotating shaft is fixedly connected to the bottom surface of the chassis, and the lifting shaft is driven to lift by a scissor lift; a temperature control assembly is provided below the temperature-conducting cavity; a heat-conducting medium circulation loop is formed between the temperature-conducting cavity and the temperature control assembly.

[0007] Preferably, the temperature-conducting cavity is provided with a spiral coil, and the space between the spiral coil and the temperature-conducting cavity is filled with a heat-conducting medium; the liquid inlet pipe of the spiral coil is connected to the liquid outlet of the temperature control component, and the liquid outlet pipe of the spiral coil is connected to the liquid inlet of the temperature control component; the liquid outlet of the temperature control component is provided with a circulation pump, and the liquid outlet end of the circulation pump is provided with a check valve.

[0008] Preferably, the heat-conducting medium is glycerol.

[0009] Preferably, a temperature sensor is provided on the outer wall of the temperature-conducting cavity. The temperature sensor collects the temperature of the outer wall of the temperature-conducting cavity and transmits it to the temperature control component. The temperature control component displays the temperature of the outer wall of the temperature-conducting cavity. The temperature control component is a heat-conducting oil heater.

[0010] Preferably, the lifting shaft is driven by two scissor lifts arranged side by side.

[0011] Preferably, the scissor lift includes: a base, a scissor linkage, a lead screw, a lifting motor, and a bearing seat; the scissor linkage includes two sets of symmetrically arranged hinged rods, one end of each set of hinged rods is hinged to the base, and the other end is hinged to the bearing seat; one end of the hinge point of the two sets of symmetrically arranged hinged rods is connected to the lead screw through a nut, and the other end is rotatably connected to the lead screw; the end of the lead screw rotatably connected to the hinge point is drively connected to the output shaft of the lifting motor.

[0012] This utility model discloses an asphalt mixture rutting test bench that can simulate a slope, which has the following beneficial effects.

[0013] This utility model includes a housing and a specimen slope adjustment assembly located at the bottom of the housing. The specimen slope adjustment assembly has a specimen groove at the top, a temperature-conducting cavity at the bottom and periphery of the specimen groove, and a dust collection groove around the temperature-conducting cavity. A lifting shaft and a rotating shaft are hinged to both ends of the bottom of the specimen slope adjustment assembly, respectively. The rotating shaft is fixedly connected to the bottom surface of the housing, and the lifting shaft is driven by a scissor lift. A temperature control assembly is located below the temperature-conducting cavity. A heat-conducting medium circulation loop is formed between the temperature-conducting cavity and the temperature control assembly. The specimen slope adjustment assembly, driven by the scissor lift, achieves stepless adjustment of the specimen tilt angle. This device achieves rapid and uniform heating of the specimen through heat-conducting medium circulation, significantly shortening the test preparation time and accurately simulating actual slope conditions, effectively improving the efficiency and simulation realism of rutting tests. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the asphalt mixture rutting test bench that can simulate a slope according to this utility model.

[0015] Figure 2 This is a schematic diagram of the structure of the asphalt mixture rutting test bench that can simulate a slope according to this utility model.

[0016] Figure 3 This is a side view of the asphalt mixture rutting test bench that can simulate a slope before slope adjustment, according to the present invention.

[0017] Figure 4 This is a side view of the asphalt mixture rutting test bench that can simulate a slope after slope adjustment according to the present invention.

[0018] Figure 5This is a front view schematic diagram of the asphalt mixture rutting test bench that can simulate a slope after slope adjustment according to the present invention.

[0019] In the attached image: 1. Specimen; 2. High-frequency industrial camera; 3. Specimen slot; 4. Temperature conduction cavity; 5. Ash collection trough; 6. Lifting shaft; 7. Rotating shaft; 8. Scissor lift; 801. Base; 802. Scissor linkage; 803. Lead screw; 804. Lifting motor; 805. Bearing seat; 9. Temperature control components; 10. Chassis. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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 this utility model.

[0022] Example 1

[0023] Please refer to Figures 1 to 2 An asphalt mixture rutting tester that can simulate vehicle driving on slopes and rainfall includes: a box and a specimen slope adjustment component located at the bottom of the box; in this embodiment, a high-frequency industrial camera 2 is also provided on one side of the specimen slope adjustment component, and the surface image of the asphalt mixture specimen 1 is acquired by the high-frequency industrial camera 2 during the test, so as to provide data support for subsequent analysis of wear, skid resistance and structural changes. The specimen slope adjustment assembly has a specimen groove 3 at the top, a temperature conducting cavity 4 at the bottom and around the specimen groove 3, and a dust collection trough 5 around the temperature conducting cavity 4. The bottom ends of the specimen slope adjustment assembly are respectively hinged to a lifting shaft 6 and a rotating shaft 7. The rotating shaft 7 is fixedly connected to the bottom surface of the housing 10, and the lifting shaft 6 is driven to lift by a scissor lift 8. A temperature control assembly 9 is provided below the temperature conducting cavity 4. A heat conduction medium circulation loop is formed between the temperature conducting cavity 4 and the temperature control assembly 9. The dust collection trough 5 is used to collect the debris generated by the asphalt mixture rutting test.

[0024] It should be noted that in this embodiment, the specimen slot 3 can hold asphalt mixture specimens that meet the specifications of "300mm long × 300mm wide × 40~150mm thick"; the outer wall of the temperature conducting cavity 4 is made of stainless steel.

[0025] Example 2

[0026] Please refer to Figures 1 to 4 Based on Embodiment 1, as a preferred embodiment, a spiral coil (not shown in the figure) is provided inside the temperature-conducting cavity 4, and the space between the spiral coil and the temperature-conducting cavity 4 is filled with a heat-conducting medium; the inlet pipe of the spiral coil is connected to the outlet of the temperature control component 9, and the outlet pipe of the spiral coil is connected to the inlet of the temperature control component 9 (not shown in the figure); a circulation pump is provided at the outlet of the temperature control component 9, and a check valve (not shown in the figure) is provided at the outlet of the circulation pump; in this embodiment, glycerol is used as the heat-conducting medium. The main reason for using glycerol is that it has a high boiling point (approximately 290°C), is non-toxic and environmentally friendly, and has a high upper limit for heating the asphalt mixture specimen 1. The heating range for the asphalt mixture specimen 1 is set from room temperature to 120°C. However, it should be noted that glycerol has a high viscosity at room temperature, requiring the use of a glycerol circulation pump. It should also be noted that a temperature sensor is installed on the outer wall of the heat-conducting cavity 4. The temperature sensor collects the temperature of the outer wall of the heat-conducting cavity 4 and transmits it to the temperature control component 9. The temperature control component heats the heat-conducting medium and then pumps it into the spiral coil through the circulation pump to fill the space between the spiral coil and the heat-conducting cavity 4 with the heat-conducting medium, thereby heating the asphalt mixture specimen 1. Alternatively, when the test conditions do not exceed 80°C, water can also be used as the heat-conducting medium. In this embodiment, the temperature control component 9 uses a thermal oil heater, specifically a commercially available Jiuyang Machinery JYO series heater.

[0027] Example 3

[0028] Based on Embodiment 2, as a preferred embodiment, a spiral heating wire is provided inside the temperature-conducting cavity 4, and the space between the spiral heating wire and the temperature-conducting cavity 4 is filled with a heat-conducting medium. In this embodiment, a temperature sensor is provided on the outer wall of the temperature-conducting cavity 4, and the temperature sensor is connected to an external display to display the temperature of the outer wall of the temperature-conducting cavity 4. Compared with the formation of a heat-conducting medium circulation loop between the temperature-conducting cavity 4 and the temperature control component 9, this embodiment directly sets the spiral heating wire inside the temperature-conducting cavity 4, which makes the device simpler and the heating faster, but the heat-conducting medium is more troublesome to replace, and the heating uniformity is not as good as that of the heat-conducting oil heater.

[0029] Example 4

[0030] Please refer to Figures 2 to 4 Based on Embodiment 1, as a preferred embodiment, in this embodiment, the lifting shaft 6 is driven by two scissor lifts 8 arranged side by side.

[0031] In this embodiment, the scissor lift 8 includes: a base 801, a scissor linkage 802, a lead screw 803, a lifting motor 804, and a bearing seat 805. The scissor linkage 802 includes two sets of symmetrically arranged hinged rods, one end of each set of hinged rods is hinged to the base 801, and the other end is hinged to the bearing seat 805. One end of the hinge point of the two sets of symmetrically arranged hinged rods is connected to the lead screw 803 via a nut, and the other end is rotatably connected to the lead screw 803. The rotatably connected end of the lead screw 803 to the hinge point is drively connected to the output shaft of the lifting motor 804. Driven by the lifting motor 804, the scissor linkage 802 can be raised and lowered, thereby raising and lowering the bearing seat 805, the lifting shaft 6, and, in conjunction with the rotating shaft 7, adjusting the angle of the specimen slope adjustment assembly.

[0032] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A test bench for rutting asphalt mixtures that can simulate slopes, characterized in that, include: The test chamber and the specimen slope adjustment assembly located at the bottom of the test chamber; The specimen slope adjustment assembly has a specimen groove at the top, a temperature-conducting cavity at the bottom and around the specimen groove, and a dust collection groove around the temperature-conducting cavity; a lifting shaft and a rotating shaft are respectively hinged at both ends of the bottom of the specimen slope adjustment assembly; the rotating shaft is fixedly connected to the bottom surface of the chassis, and the lifting shaft is driven to lift by a scissor lift; a temperature control assembly is provided below the temperature-conducting cavity; a heat-conducting medium circulation loop is formed between the temperature-conducting cavity and the temperature control assembly.

2. The asphalt mixture rutting test bench capable of simulating a slope as described in claim 1, characterized in that, The temperature-conducting cavity is equipped with a spiral coil, and the space between the spiral coil and the temperature-conducting cavity is filled with a heat-conducting medium; the liquid inlet pipe of the spiral coil is connected to the liquid outlet of the temperature control component, and the liquid outlet pipe of the spiral coil is connected to the liquid inlet of the temperature control component; the liquid outlet of the temperature control component is equipped with a circulation pump, and the liquid outlet end of the circulation pump is equipped with a check valve.

3. The asphalt mixture rutting test bench capable of simulating a slope as described in claim 2, characterized in that, The heat-conducting medium is glycerol.

4. The asphalt mixture rutting test bench capable of simulating a slope as described in claim 2, characterized in that, A temperature sensor is provided on the outer wall of the temperature-conducting cavity. The temperature sensor collects the temperature of the outer wall of the temperature-conducting cavity and transmits it to the temperature control component. The temperature control component displays the temperature of the outer wall of the temperature-conducting cavity. The temperature control component is a heat-conducting oil heater.

5. The asphalt mixture rutting test bench capable of simulating a slope as described in claim 1, characterized in that, The lifting shaft is driven by two scissor lifts arranged side by side.

6. The asphalt mixture rutting test bench capable of simulating a slope as described in claim 1 or 5, characterized in that, The scissor lift includes: a base, a scissor linkage, a lead screw, a lifting motor, and a bearing seat; the scissor linkage includes two sets of symmetrically arranged hinged rods, one end of each set of hinged rods is hinged to the base, and the other end is hinged to the bearing seat; one end of the hinge point of the two sets of symmetrically arranged hinged rods is connected to the lead screw through a nut, and the other end is rotatably connected to the lead screw; the rotatably connected end of the lead screw to the hinge point is drively connected to the output shaft of the lifting motor.

Images