An asphalt pavement shear fatigue degree detection device

Abstract

This utility model relates to the field of asphalt pavement shear fatigue testing technology, specifically an asphalt pavement shear fatigue testing device, including a testing box, a protective cover, a testing mechanism, and a clamping mechanism. An adjustable seat is adjustable inside the testing box. Multiple sets of protective covers are evenly installed on the top of the adjusting seat. The testing mechanism is located inside the protective cover. The clamping mechanism is symmetrically arranged on the side wall of the protective cover for clamping the asphalt sample block placed on the top of the adjusting seat. This utility model, through the arrangement of multiple sets of protective covers and clamping mechanisms, facilitates the clamping and limiting of multiple sets of asphalt sample blocks, allowing the corresponding testing mechanisms to perform simultaneous testing. This enables the acquisition of multiple sets of test data for comparison and integration, improving the accuracy of the test results and increasing testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of asphalt pavement shear fatigue testing technology, specifically to an asphalt pavement shear fatigue testing device. Background Technology

[0002] Modified asphalt is an asphalt binder made by adding admixtures such as rubber, resin, or other fillers, or by taking measures such as slight oxidation processing of asphalt, to improve the performance of asphalt or asphalt mixtures. When vehicles drive on asphalt roads for a long time, they exert shear forces on the asphalt pavement, which can lead to cracking and damage. Therefore, to ensure the stability of asphalt pavement in use, it is necessary to use testing equipment to test the shear fatigue of steel bridge asphalt pavement before asphalt pavement is laid.

[0003] Chinese patent CN118032525B discloses a shear fatigue testing device for asphalt pavement of steel bridges, including a testing shell and a lifting testing mechanism. The operator places an asphalt sample on top of a steel plate and starts a forward and reverse motor. The motor drives a threaded shaft to rotate, which in turn lowers the square shell. The square shell then lowers the testing components. When the sample is above the asphalt sample, a hydraulic rod is activated, causing the square shell to press down on the square shell, thus applying pressure to the asphalt sample. This enhances the versatility of the device in testing the pressure of asphalt samples.

[0004] However, the above-mentioned publicly available solutions have the following shortcomings: the clamping and testing components can only be used to test the shear fatigue of one asphalt sample at a time, the test results are random, and it is impossible to obtain multiple sets of test data for comparison at the same time, which reduces the testing efficiency. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the background technology by proposing an asphalt pavement shear fatigue testing device.

[0006] The technical solution of this utility model is as follows: an asphalt pavement shear fatigue testing device, including a testing box with an adjustable seat inside; a protective cover, which is provided in multiple sets and evenly installed on the top of the adjusting seat; a testing mechanism, which is located inside the protective cover, comprising two sets of guide rods installed on the inner wall of the protective cover, a slide block slidably connected to the two sets of guide rods, an electric telescopic rod installed on the slide block, a U-shaped seat installed on the output end of the electric telescopic rod, a testing wheel rotatably connected to the U-shaped seat, and a motor installed on the outer wall of the U-shaped seat, the testing wheel being driven to rotate by the motor; and a clamping mechanism, which is symmetrically arranged on the side wall of the protective cover for clamping the asphalt sample block placed on the top of the adjusting seat.

[0007] Preferably, the inner wall of the testing chamber is provided with a baffle bar, one end of the adjusting seat is hinged to the side wall of the testing chamber away from the baffle bar, the other end of the adjusting seat abuts against the bottom end of the baffle bar, and an electric push rod is hinged to the bottom of the testing chamber, the other end of the electric push rod is hinged to the bottom end of the adjusting seat.

[0008] Preferably, a receiving drawer is slidably connected to the testing box, and the receiving drawer is located below the discharge end of the adjusting seat.

[0009] Preferably, the clamping mechanism includes a bidirectional lead screw rotatably connected to the front end of the protective cover, with two sets of moving rods symmetrically threaded onto the bidirectional lead screw; and two sets of slide rods symmetrically slidably connected to the side wall of the protective cover, with the slide rods connected to the corresponding moving rods, and an abutment plate installed on one end of the slide rod located inside the protective cover.

[0010] Preferably, the clamping mechanism further includes a C-shaped seat that is slidably connected to and passes through the adjusting seat; and a spring whose bottom end is connected to the bottom end of the C-shaped seat and whose top end is connected to the bottom end of the adjusting seat.

[0011] Preferably, a temperature control mechanism is provided at the top of the testing chamber, and the output end of the temperature control mechanism extends into the interior of the testing chamber.

[0012] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial technical effects: the adjustable seat of this utility model makes it easy to collect the fragments generated by the tested asphalt sample blocks into the receiving drawer, reducing the cleaning work; the setting of multiple protective covers and clamping mechanisms makes it easy to clamp and limit multiple sets of asphalt sample blocks, which makes it easy for the corresponding testing institutions to conduct tests at the same time, thereby obtaining multiple sets of test data for comparison and integration, improving the accuracy of test results and improving testing efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the testing box of this utility model;

[0015] Figure 3 This is a schematic diagram showing the connection between the testing mechanism and the protective cover of this utility model;

[0016] Figure 4 This is a schematic diagram showing the connection between the clamping mechanism and the protective cover of this utility model.

[0017] Reference numerals: 1. Detection box; 101. Stop bar; 102. Receiving drawer; 103. Temperature control mechanism; 2. Adjustment seat; 201. Electric push rod; 3. Protective cover; 4. Guide rod; 401. Slide seat; 402. Electric telescopic rod; 403. U-shaped seat; 404. Detection wheel; 405. Motor; 5. Two-way lead screw; 501. Moving rod; 502. Slide rod; 503. Abutment plate; 504. C-shaped seat; 505. Spring. Detailed Implementation

[0018] Example 1

[0019] like Figure 1 , Figure 3 and Figure 4 As shown, this utility model proposes an asphalt pavement shear fatigue testing device, including a testing box 1, a protective cover 3, a testing mechanism, and a clamping mechanism. An adjustable seat 2 is adjustable inside the testing box 1, and a temperature control mechanism 103 is installed at the top of the testing box 1. The output end of the temperature control mechanism 103 extends into the interior of the testing box 1, facilitating the control of the testing temperature inside the testing box 1, thereby detecting the effect of temperature on the shear fatigue of the asphalt sample and further improving testing efficiency. Multiple sets of protective covers 3 are evenly installed on the top of the adjustable seat 2. The testing machine... The structure is set inside the protective cover 3. The detection mechanism consists of two sets of guide rods 4 installed on the inner wall of the protective cover 3, a slide block 401 slidably connected to the two sets of guide rods 4, an electric telescopic rod 402 installed on the slide block 401, a U-shaped seat 403 installed at the output end of the electric telescopic rod 402, a detection wheel 404 rotatably connected to the U-shaped seat 403, and a motor 405 installed on the outer wall of the U-shaped seat 403. The detection wheel 404 is driven to rotate by the motor 405. The clamping mechanism is symmetrically arranged on the side wall of the protective cover 3 and is used to clamp the asphalt sample block placed at the top of the adjusting seat 2.

[0020] Furthermore, the clamping mechanism includes a bidirectional lead screw 5, a slide bar 502, a C-shaped seat 504, and a spring 505; the bidirectional lead screw 5 is rotatably connected to the front end of the protective cover 3, and two sets of moving rods 501 are symmetrically threaded on the bidirectional lead screw 5, and a rotating handle is provided on the bidirectional lead screw 5; two sets of slide bars 502 are provided, and the two sets of slide bars 502 are symmetrically slidably connected to the side wall of the protective cover 3, and the slide bars 502 are connected to the corresponding moving rods 501, and an abutment plate 503 is installed on the slide bar 502 and at one end inside the protective cover 3; the C-shaped seat 504 is slidably connected and passes through the adjusting seat 2; the bottom end of the spring 505 is connected to the bottom end of the C-shaped seat 504, and the top end of the spring 505 is connected to the bottom end of the adjusting seat 2.

[0021] In this embodiment, the sealed door on the test box 1 is opened, and the C-shaped seat 504 in the protective cover 3 is pressed down along the adjusting seat 2, so that the spring 505 is stretched until the top of the C-shaped seat 504 abuts against the top of the adjusting seat 2. At this time, the asphalt sample block is placed between the C-shaped seat 504 and the rear side wall of the protective cover 3. The top of the C-shaped seat 504 has an inclined part. When the C-shaped seat 504 moves down along the adjusting seat 2, the inclined part guides the asphalt sample block and places it smoothly between the C-shaped seat 504 and the rear side wall of the protective cover 3. Then the C-shaped seat 504 is released, and under the elastic recovery action of the spring 505, the C-shaped seat 504 moves up along the adjusting seat 2 to return to the initial position. Then the C-shaped seat 504 presses the asphalt sample block against the rear side wall of the protective cover 3, improving the installation stability of the asphalt sample block and avoiding interference with the reciprocating rolling of the test wheel 404.

[0022] Multiple sets of asphalt samples are placed in their respective protective covers 3, so that the front end of the asphalt sample is pressed against the rear side wall of the protective cover 3. The double screw 5 is rotated under the guidance of the slide rod 502, so that the two sets of moving rods 501 move closer to each other along the double screw 5, thereby driving the two sets of abutment plates 503 to move closer to each other until the left and right sides of the asphalt sample are clamped, and the asphalt sample is stably limited in the protective cover 3. The other sets of asphalt samples are limited in this way.

[0023] The electric telescopic rod 402 extends from its output end, causing the detection wheel 404 to move down to a suitable height until it contacts the asphalt sample block. The motor 405 then starts, driving the detection wheel 404 to rotate clockwise or counterclockwise along the top of the asphalt sample block, thus causing it to roll back and forth for testing. The electric telescopic rod 402 allows for varying pressure applied by the detection wheel 404 to the asphalt sample block, simulating the shear force exerted on the asphalt pavement by vehicles of different weights. The forces applied by the electric telescopic rod 402 to multiple asphalt sample blocks are transmitted to the controller for data processing. After testing, the multiple sets of data are integrated to obtain more accurate shear fatigue test data, improving testing efficiency.

[0024] Example 2

[0025] like Figure 1 and Figure 2 As shown, the asphalt pavement shear fatigue testing device proposed in this utility model, compared with the first embodiment, has a baffle 101 provided on the inner wall of the testing box 1, one end of the adjusting seat 2 is hinged to the side wall of the testing box 1 away from the baffle 101, the other end of the adjusting seat 2 abuts against the bottom end of the baffle 101, and an electric push rod 201 is hinged to the bottom of the testing box 1, the other end of the electric push rod 201 is hinged to the bottom end of the adjusting seat 2.

[0026] Furthermore, a receiving drawer 102 is slidably connected to the testing box 1, and the receiving drawer 102 is located below the discharge end of the adjusting seat 2.

[0027] In this embodiment, after the asphalt sample block is tested, the asphalt sample block will partially crack and break due to the different pressures applied by the electric telescopic rod 402, resulting in asphalt fragments. The large asphalt sample block at the top of the adjusting seat 2 is removed, and then the output end of the electric push rod 201 retracts to drive the adjusting seat 2 to flip downward. As a result, the asphalt fragments on the top of the adjusting seat 2 will slide down the inclined adjusting seat 2 into the collection drawer 102 for collection. The asphalt fragments can be cleaned up by pulling the collection drawer 102 out of the testing box 1.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A device for testing the shear fatigue strength of asphalt pavement, characterized in that, include The testing box (1) has an adjustable seat (2) inside; The protective cover (3) is provided in multiple sets, and the multiple sets of protective covers (3) are evenly installed on the top of the adjusting seat (2); The testing mechanism is set inside the protective cover (3). The testing mechanism consists of two sets of guide rods (4) installed on the inner wall of the protective cover (3), a slide (401) slidably connected to the two sets of guide rods (4), an electric telescopic rod (402) installed on the slide (401), a U-shaped seat (403) installed at the output end of the electric telescopic rod (402), a testing wheel (404) rotatably connected to the U-shaped seat (403), and a motor (405) installed on the outer wall of the U-shaped seat (403). The testing wheel (404) is driven to rotate by the motor (405). And a clamping mechanism, which is symmetrically arranged on the side wall of the protective cover (3), is used to clamp the asphalt sample block placed on the top of the adjusting seat (2).

2. The asphalt pavement shear fatigue testing equipment according to claim 1, characterized in that, The inner wall of the test box (1) is provided with a baffle (101). One end of the adjusting seat (2) is hinged to the side wall of the test box (1) away from the baffle (101). The other end of the adjusting seat (2) abuts against the bottom end of the baffle (101). An electric push rod (201) is hinged to the bottom of the test box (1). The other end of the electric push rod (201) is hinged to the bottom end of the adjusting seat (2).

3. The asphalt pavement shear fatigue testing equipment according to claim 2, characterized in that, A receiving drawer (102) is slidably connected to the testing box (1), and the receiving drawer (102) is located below the discharge end of the adjusting seat (2).

4. The asphalt pavement shear fatigue testing equipment according to claim 1, characterized in that, Clamping mechanism includes A two-way lead screw (5) is rotatably connected to the front end of the protective cover (3), and two sets of moving rods (501) are symmetrically threaded on the two-way lead screw (5); And a sliding rod (502), which is provided in two sets. The two sets of sliding rods (502) are symmetrically slidably connected to the side wall of the protective cover (3). The sliding rod (502) is connected to the corresponding moving rod (501). An abutment plate (503) is installed on the sliding rod (502) and at one end inside the protective cover (3).

5. The asphalt pavement shear fatigue testing equipment according to claim 4, characterized in that, The clamping mechanism also includes C-shaped seat (504), which is slidably connected to and passes through the adjusting seat (2); And a spring (505), the bottom end of which is connected to the bottom end of the C-shaped seat (504), and the top end of the spring (505) is connected to the bottom end of the adjusting seat (2).

6. The asphalt pavement shear fatigue testing device according to claim 1, characterized in that, A temperature control mechanism (103) is provided at the top of the test chamber (1), and the output end of the temperature control mechanism (103) extends into the interior of the test chamber (1).

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