Detection equipment for dry shrinkage test of anti-cracking cement stabilized macadam and use method of detection equipment

Abstract

The invention relates to the technical field of material detection equipment, and discloses anti-cracking cement stabilized macadam dry shrinkage test detection equipment and a using method thereof.The anti-cracking cement stabilized macadam dry shrinkage test detection equipment comprises a detection assembly, an adjusting assembly, a lifting assembly, a weighing assembly, a dial indicator, a cooling assembly and a heating assembly, and the bottom of the detection assembly is fixedly connected with the top of the adjusting assembly; the outer wall of the adjusting assembly is connected with the outer wall of the lifting assembly in a meshed mode, the outer wall of the lifting assembly is rotationally connected with the inner wall of the weighing assembly, and the inner wall of the weighing assembly is connected with the inner wall of the dial indicator in a clamped mode. According to the anti-cracking cement stabilized macadam dry shrinkage test detection equipment and the use method thereof, through mutual cooperative use of the adjusting structure, the weighing structure and the dial indicator, a dry shrinkage test can be directly performed on a sample after the sample is weighed, and a worker does not need to carry or transfer the sample again; and the accuracy of the detection test is improved while the working efficiency of workers is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material testing equipment, and specifically relates to a dry shrinkage test detection equipment for crack-resistant cement stabilized macadam and its usage method. Background Art

[0002] Cement stabilized macadam is the most commonly used base material for high-grade highways in China, and has advantages such as high strength, good water stability, and large rigidity. However, cement stabilized macadam is relatively sensitive to changes in moisture and temperature. The loss of moisture and the change of temperature gradient are extremely likely to generate dry shrinkage and temperature shrinkage stresses inside the structure, causing the base course to crack. Under the combined influence of traffic loads and environmental factors, the base course cracks gradually extend upward and finally expand to the asphalt surface layer, forming reflection cracks. At present, when most of the dry shrinkage test detection equipment for cement stabilized macadam on the market is in use, it is necessary to weigh the selected samples and then place the samples into the dry shrinkage box for dry shrinkage operation, which increases the labor intensity of the staff. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a dry shrinkage test detection equipment for crack-resistant cement stabilized macadam and its usage method, which solves the problem of cumbersome operation of the existing dry shrinkage test detection equipment.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A dry shrinkage test detection equipment for crack-resistant cement stabilized macadam includes a detection component, an adjustment component, a lifting component, a weighing component, a dial indicator, a cooling component, and a heating component. The bottom of the detection component is fixedly connected to the top of the adjustment component. The outer wall of the adjustment component is meshed with the outer wall of the lifting component. The outer wall of the lifting component is rotationally connected to the inner wall of the weighing component. The inner wall of the weighing component is snap-connected to the inner wall of the dial indicator. The back of the detection component is fixedly connected to the front of the cooling component. One end of the heating component is fixedly connected to the right side of the detection component.

[0005] Preferably, the detection component includes a detection box, guide rails, a sealed door, a dehumidifier, a humidifier, a guiding block, and two support blocks. Guide rails are provided at the top and bottom of the front of the detection box, and the inner wall of the guide rail is slidably connected to the outer wall of the sealed door. The bottom of the dehumidifier is fixedly connected to the lower right side of the inner side wall of the detection box, and the bottom of the humidifier is fixedly connected to the lower left side of the inner side wall of the detection box. The bottom of the guiding block is fixedly connected to the inner bottom wall of the detection box, and the bottoms of the detection box near both sides are respectively fixedly connected to the tops of the two support blocks. The bottom of the detection box is fixedly connected to the top of the adjustment component.

[0006] Preferably, the adjusting assembly includes an adjusting block, a worm, and an adjusting disk. The top of the adjusting block is fixedly connected to the bottom of the detection box, and the inner wall of the adjusting block is rotatably connected to the outer wall of the worm. One end of the worm is snap-fitted to the inner wall of the adjusting disk, and the outer wall of the worm is meshed with the outer wall of the lifting assembly.

[0007] Preferably, the lifting assembly includes a worm gear, a threaded pipe, a threaded rod, a lifting platform, and a guiding rod. The outer wall of the worm gear is meshed with the outer wall of the worm, and the inner wall of the worm gear is snap-fitted to the outer wall of the threaded pipe. One end of the threaded pipe penetrates through the bottom wall of the detection box and extends into the detection box, and the outer wall of the threaded pipe is rotatably connected to the inner wall of the weighing assembly. The inner wall of the threaded pipe is meshed with the outer wall of the threaded rod, and the top end of the threaded rod is fixedly connected to the bottom of the lifting platform. A guiding rod is arranged at the bottom of the lifting platform near the edge, and the outer wall of the guiding rod is slidably inserted into the inner wall of the weighing assembly.

[0008] Preferably, the load-bearing assembly includes a C-shaped bracket, a hanging scale, an L-shaped support plate, a side plate, a clamping rod, a clamping block, an abutting block, and a slider. The inner wall of the bottom extension plate of the C-shaped bracket is rotatably connected to the inner wall of the threaded pipe, and both sides of the inner wall of the bottom extension plate of the C-shaped bracket near the connection of the threaded pipe are movably inserted into the outer wall of the guiding rod. The inner wall of the top extension plate of the C-shaped bracket is snap-fitted to the outer wall of the hanging scale, and the bottom of the hanging scale is fixedly connected to the top of the L-shaped support plate. The top of the bottom extension plate of the L-shaped support plate is fixedly connected to the bottom of the side plate, and the inner wall of the side plate is threadedly connected to the outer wall of the clamping rod. One end of the clamping rod is provided with a rotating handle, and the other end of the clamping rod is rotatably connected to the inner wall of the clamping block. An abutting block is arranged at the top of the top extension plate of the C-shaped bracket, and a dial indicator is arranged between the abutting block and the hanging scale on the top extension plate of the C-shaped bracket. A slider is arranged at the bottom of the bottom extension plate of the C-shaped bracket, and the outer wall of the slider is slidably connected to the inner wall of the guiding block.

[0009] Preferably, the cooling assembly includes a compressor and a heat conduction pipe. The compressor is installed on the back of the detection box, and the output end of the compressor is fixedly connected to one end of the heat conduction pipe. The back of the heat conduction pipe is fixedly connected to the inner side wall of the detection box.

[0010] Preferably, the heating assembly includes a driving block, a driving motor, a fan, an electric heating grid, a duct, and a valve plate. The inner wall of the driving block is fixedly connected to the outer wall of the duct through bolts, and the inner wall of the driving block is snap-fitted to the outer wall of the driving motor. The outer wall of the output end of the driving motor is snap-fitted to the inner wall of the fan, and the outer wall of the output end of the driving motor is rotatably connected to the inner wall of the electric heating grid. The outer wall of the electric heating grid is fixedly connected to the inner wall of the duct, and one end of the duct away from the electric heating grid is fixedly connected to the right side of the detection box. The inner wall of the duct near the detection box is rotatably connected to the outer wall of the valve plate through a torsion spring.

[0011] Preferably, a fitting groove is formed at the top of the detection box, and the shape and size of the fitting groove are both matched with those of the abutting block. The top of the top extension plate of the U-shaped bracket is movably abutted against the inner top wall of the detection box.

[0012] Preferably, the dehumidifier, the humidifier, the compressor, the driving motor and the electric heating grid are all electrically connected through a PLC control board.

[0013] Preferably, a method for using an anti-cracking cement stabilized macadam dry shrinkage test detection device includes the following steps:

[0014] S1: After drying the water droplets remaining on the outer wall of the sample, place the sample in the L-shaped support plate, and fix the sample from both sides by rotating the clamping rod so that the clamping blocks fix the sample. Push the U-shaped bracket into the detection box, close the airtight door, and observe the value on the hanging scale to record the mass of the sample.

[0015] S2: By rotating the adjusting disc, the adjusting disc drives the worm to rotate. Under the meshing action, the worm drives the worm wheel to rotate, and the worm wheel drives the threaded tube to rotate. Under the meshing action and the limiting action of the guide rod, the threaded tube can drive the threaded rod to move upward. The threaded rod drives the lifting platform to pass through the L-shaped support plate and abut against the bottom of the sample and continuously push the sample, so that the sample abuts against the input end of the dial indicator, and the pointer of the dial indicator rotates to a specified position.

[0016] S3: Control the dehumidifier, the humidifier, the compressor, the driving motor and the electric heating grid to operate through the PLC control board, so that the internal air of the detection box reaches the specified standard, and the sample conducts a dry shrinkage test in the detection box. Determine the dry shrinkage length of the sample by observing the movement distance of the pointer of the dial indicator driven by the sample after dry shrinkage. At the same time, rotate the worm in the reverse direction so that the sample contacts the L-shaped support plate again. Record the mass of the dried sample through the hanging scale, and obtain the dry shrinkage degree of the sample through the corresponding formula.

[0017] The present invention provides an anti-cracking cement stabilized macadam dry shrinkage test detection device and a method for using the same. Compared with the prior art, the following beneficial effects are achieved:

[0018] (1) By the combined use of the adjusting structure, the weighing structure and the dial indicator, the anti-cracking cement stabilized macadam dry shrinkage test detection device and the method for using the same can directly conduct a dry shrinkage test on the sample after weighing the sample, without the need for the staff to carry or transfer the sample again, which improves the work efficiency of the staff and also improves the accuracy of the detection test.

[0019] (2) The anti-cracking cement stabilized macadam dry shrinkage test detection equipment and its usage method can always keep the detection box in an ideal test environment through the coordinated use of the detection component, the temperature reduction component and the temperature increase component, improving the accuracy of the detection test.

[0020] (3) The anti-cracking cement stabilized macadam dry shrinkage test detection equipment and its usage method can freely adjust the device according to samples of different sizes through the pushing of the U-shaped bracket and the clamping of the clamping block, facilitating the staff to take out the samples from the detection box. Description of the Drawings

[0021] Figure 1 Schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 Schematic diagram of the connection structure of the detection component and the adjustment component of the present invention;

[0024] Figure 4 Schematic diagram of the structure of the temperature reduction component of the present invention;

[0025] Figure 5 Schematic diagram of the connection structure of the lifting component and the load-bearing component of the present invention;

[0026] Figure 6 Schematic diagram of the structure of the temperature increase component of the present invention; Figure 7 Schematic diagram of the structure of the adjustment component and the lifting component of the present invention.

[0027] In the figure: 1. Detection component 1; 101. Detection box; 102. Guide rail; 103. Sealed door; 104. Dehumidifier; 105. Humidifier; 106. Guide block; 107. Support block; 2. Adjustment component; 201. Adjustment block; 202. Worm; 203. Adjustment disk; 3. Lifting component; 301. Worm gear; 302. Threaded pipe; 303. Threaded rod; 304. Lifting platform; 305. Guide rod; 4. Load-bearing component; 401. U-shaped bracket; 402. Hanging scale; 403. L-shaped support plate; 404. Side plate; 405. Clamping rod; 406. Clamping block; 407. Abutting block; 408. Slide block; 5. Dial indicator; 6. Temperature reduction component; 601. Compressor; 602. Temperature conducting pipe; 7. Temperature increase component; 701. Driving block; 702. Driving motor; 703. Fan; 704. Electric heating grid; 705. Air duct; 706. Valve plate. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-7 , a dry shrinkage test detection device for crack-resistant cement stabilized macadam, comprising a detection component 1, an adjustment component 2, a lifting component 3, a weighing component 4, a dial indicator 5, a cooling component 6 and a heating component 7. The bottom of the detection component 1 is fixedly connected to the top of the adjustment component 2, the outer wall of the adjustment component 2 is meshed with the outer wall of the lifting component 3, the outer wall of the lifting component 3 is rotatably connected to the inner wall of the weighing component 4, the inner wall of the weighing component 4 is snap-connected to the inner wall of the dial indicator 5, the back of the detection component 1 is fixedly connected to the front of the cooling component 6, and one end of the heating component 7 is fixedly connected to the right side of the detection component 1.

[0030] In the present invention, the detection component 1 includes a detection box 101, guide rails 102, a sealed door 103, a dehumidifier 104, a humidifier 105, a guiding block 106 and two support blocks 107. Guide rails 102 are provided at both the top and bottom of the front of the detection box 101, and the outer wall of the sealed door 103 is slidably connected to the inner wall of the guide rails 102. The bottom of the right lower inner side wall of the detection box 101 is fixedly connected to the bottom of the dehumidifier 104, and the bottom of the left lower inner side wall of the detection box 101 is fixedly connected to the bottom of the humidifier 105. The inner bottom wall of the detection box 101 is fixedly connected to the bottom of the guiding block 106, and the bottoms of the detection box 101 near both sides are respectively fixedly connected to the tops of the two support blocks 107. The bottom of the detection box 101 is fixedly connected to the top of the adjustment component 2.

[0031] In the present invention, the adjustment component 2 includes an adjustment block 201, a worm 202 and an adjustment disk 203. The top of the adjustment block 201 is fixedly connected to the bottom of the detection box 101, and the inner wall of the adjustment block 201 is rotatably connected to the outer wall of the worm 202. One end of the worm 202 is snap-connected to the inner wall of the adjustment disk 203, and the outer wall of the worm 202 is meshed with the outer wall of the lifting component 3.

[0032] In the present invention, the lifting assembly 3 includes a worm gear 301, a threaded tube 302, a threaded rod 303, a lifting platform 304 and a guide rod 305. The outer wall of the worm gear 301 is meshed and connected with the outer wall of the worm 202, and the inner wall of the worm gear 301 is snap-fitted with the outer wall of the threaded tube 302. One end of the threaded tube 302 penetrates through the bottom wall of the detection box 101 and extends into the detection box 101, and the outer wall of the threaded tube 302 is rotatably connected with the inner wall of the weighing assembly 4. The inner wall of the threaded tube 302 is meshed with the outer wall of the threaded rod 303, and the top end of the threaded rod 303 is fixedly connected with the bottom of the lifting platform 304. Guide rods 305 are arranged at the bottom of the lifting platform 304 near the edge, and the outer walls of the guide rods 305 are slidably inserted into the inner wall of the weighing assembly 4.

[0033] In the present invention, the load-bearing assembly 4 includes a C-shaped bracket 401, a hanging scale 402, an L-shaped support plate 403, a side plate 404, a clamping rod 405, a clamping block 406, a contact block 407 and a slider 408. The inner wall of the bottom extension plate of the C-shaped bracket 401 is rotatably connected with the inner wall of the threaded tube 302, and the outer walls of the guide rods 305 are movably inserted into the two sides of the inner wall of the bottom extension plate of the C-shaped bracket 401 near the connection of the threaded tube 302. The inner wall of the top extension plate of the C-shaped bracket 401 is snap-fitted with the outer wall of the hanging scale 402, and the bottom of the hanging scale 402 is fixedly connected with the top of the L-shaped support plate 403. The top of the bottom extension plate of the L-shaped support plate 403 is fixedly connected with the bottom of the side plate 404, and the inner wall of the side plate 404 is threadedly connected with the outer wall of the clamping rod 405. One end of the clamping rod 405 is provided with a rotating handle, and the other end of the clamping rod 405 is rotatably connected with the inner wall of the clamping block 406. A contact block 407 is arranged at the top of the top extension plate of the C-shaped bracket 401, and a dial indicator 5 is arranged between the contact block 407 and the hanging scale 402 on the top extension plate of the C-shaped bracket 401. A slider 408 is arranged at the bottom of the bottom extension plate of the C-shaped bracket 401, and the outer wall of the slider 408 is slidably connected with the inner wall of the guide block 106.

[0034] In the present invention, the temperature-lowering assembly 6 includes a compressor 601 and a heat-conducting tube 602. The compressor 601 is installed on the back of the detection box 101, and the output end of the compressor 601 is fixedly connected with one end of the heat-conducting tube 602. The back of the heat-conducting tube 602 is fixedly connected with the inner side wall of the detection box 101.

[0035] In the present invention, the heating component 7 includes a driving block 701, a driving motor 702, a fan 703, an electric heating grid 704, an air duct 705 and a valve plate 706. The inner wall of the driving block 701 is fixedly connected to the outer wall of the air duct 705 by bolts, and the inner wall of the driving block 701 is engaged with the outer wall of the driving motor 702. The outer wall of the output end of the driving motor 702 is engaged with the inner wall of the fan 703, and the outer wall of the output end of the driving motor 702 is rotatably connected to the inner wall of the electric heating grid 704. The outer wall of the electric heating grid 704 is fixedly connected to the inner wall of the air duct 705, and one end of the air duct 705 away from the electric heating grid 704 is fixedly connected to the right side of the detection box 101. The inner wall of the air duct 705 near the detection box 101 is rotatably connected to the outer wall of the valve plate 706 through a torsion spring.

[0036] In the present invention, a fitting groove is provided at the top of the detection box 101, and the shape and size of the fitting groove are both mutually matched with the shape and size of the abutting block 407. The top of the top extension plate of the U-shaped bracket 401 is movably abutted against the inner top wall of the detection box 101.

[0037] In the present invention, the dehumidifier 104, the humidifier 105, the compressor 601, the driving motor 702 and the electric heating grid 704 are all electrically connected through a PLC control board.

[0038] A method for using a dry shrinkage test detection device for crack-resistant cement stabilized macadam includes the following steps:

[0039] S1: After drying the water droplets remaining on the outer wall of the sample, place the sample in the L-shaped support plate 403, push the U-shaped bracket 401 into the detection box 101, close the airtight door 103, and fix the sample from both sides by rotating the clamping rod 405 to make the clamping block 406. Observe the value on the hanging scale 402 and record the mass of the sample.

[0040] S2: By rotating the adjusting disk 203, the adjusting disk 203 drives the worm 202 to rotate. Under the meshing force, the worm 202 drives the worm wheel 301 to rotate. The worm wheel 301 drives the threaded tube 302 to rotate. Under the meshing force and the limiting action of the guiding rod 305, the threaded tube 302 can drive the threaded rod 303 to move upward. The threaded rod 303 drives the lifting platform 304 to pass through the L-shaped support plate 403 and abut against the bottom of the sample and continuously push the sample, so that the sample abuts against the input end of the dial indicator 5, and the pointer of the dial indicator 5 rotates to a specified position.

[0041] S3: Control the operation of the dehumidifier 104, humidifier 105, compressor 601, drive motor 702, and electric heating grid 704 through the PLC control board, so that the internal air of the test chamber 101 meets the specified standards, and conduct a dry shrinkage test on the sample in the test chamber 101. Determine the dry shrinkage length of the sample by observing the movement distance of the pointer of the dial indicator 5 driven by the sample after dry shrinkage. At the same time, reverse-rotate the worm 202 to make the sample contact the L-shaped support plate 403 again, record the mass of the sample after dry shrinkage by observing the hanging scale 402, and obtain the dry shrinkage degree of the sample through the corresponding formula.

[0042] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-cracking cement stabilized macadam dry shrinkage test detection device, comprising a detection component (1), an adjustment component (2), a lifting component (3), a weighing component (4), a dial indicator (5), a cooling component (6) and a heating component (7), characterized in that: The bottom of the detection component (1) is fixedly connected to the top of the adjustment component (2). The outer wall of the adjustment component (2) is meshed and connected to the outer wall of the lifting component (3). The outer wall of the lifting component (3) is rotatably connected to the inner wall of the weighing component (4). The inner wall of the weighing component (4) is snap-fitted to the inner wall of the micrometer (5). The back of the detection component (1) is fixedly connected to the front of the temperature reduction component (6). One end of the detection component (1) is fixedly connected to the right side of the temperature increase component (7).

2. The dry shrinkage test detection equipment for crack-resistant cement stabilized macadam according to claim 1, characterized in that: The detection component (1) includes a detection box (101), guide rails (102), a sealed door (103), a dehumidifier (104), a humidifier (105), a guide block (106), and two support blocks (107). Guide rails (102) are provided at both the top and bottom of the front of the detection box (101), and the inner wall of the guide rail (102) is slidably connected to the outer wall of the sealed door (103). The bottom of the dehumidifier (104) is fixedly connected to the lower right inner wall of the detection box (101), and the bottom of the humidifier (105) is fixedly connected to the lower left inner wall of the detection box (101). The bottom of the guide block (106) is fixedly connected to the inner bottom wall of the detection box (101), and the bottoms of the detection box (101) near both sides are respectively fixedly connected to the tops of the two support blocks (107). The bottom of the detection box (101) is fixedly connected to the top of the adjustment component (2).

3. The anti-cracking cement stabilized macadam dry shrinkage test detection device according to claim 2, characterized in that: The adjustment component (2) includes an adjustment block (201), a worm (202), and an adjustment disc (203). The top of the adjustment block (201) is fixedly connected to the bottom of the detection box (101), and the inner wall of the adjustment block (201) is rotatably connected to the outer wall of the worm (202). One end of the worm (202) is snap-fitted to the inner wall of the adjustment disc (203), and the outer wall of the worm (202) is meshed and connected to the outer wall of the lifting component (3).

4. The dry shrinkage test detection equipment for crack-resistant cement stabilized macadam according to claim 3, characterized in that: The lifting component (3) includes a worm gear (301), a threaded pipe (302), a threaded rod (303), a lifting platform (304), and a guide rod (305). The outer wall of the worm gear (301) is meshed and connected to the outer wall of the worm (202), and the inner wall of the worm gear (301) is snap-fitted to the outer wall of the threaded pipe (302). One end of the threaded pipe (302) penetrates the bottom wall of the detection box (101) and extends into the detection box (101), and the outer wall of the threaded pipe (302) is rotatably connected to the inner wall of the weighing component (4). The inner wall of the threaded pipe (302) is meshed and connected to the outer wall of the threaded rod (303), and the top of the threaded rod (303) is fixedly connected to the bottom of the lifting platform (304). Guide rods (305) are provided at the bottom of the lifting platform (304) near the edge, and the outer walls of the guide rods (305) are slidably inserted into the inner wall of the weighing component (4).

5. An anti-cracking cement stabilized macadam dry shrinkage test and detection device according to claim 4, characterized in that: The load-bearing component (4) includes a U-shaped bracket (401), a hanging scale (402), an L-shaped support plate (403), a side plate (404), a clamping rod (405), a clamping block (406), an abutting block (407) and a slider (408). The inner wall of the bottom extension plate of the U-shaped bracket (401) is rotatably connected to the inner wall of the threaded pipe (302), and the outer walls of both sides of the inner wall of the bottom extension plate of the U-shaped bracket (401) near the connection of the threaded pipe (302) are movably inserted into the outer wall of the guide rod (305). The inner wall of the top extension plate of the U-shaped bracket (401) is snap-connected to the outer wall of the hanging scale (402), and the bottom of the hanging scale (402) is fixedly connected to the top of the L-shaped support plate (403). The top of the bottom extension plate of the L-shaped support plate (403) is fixedly connected to the bottom of the side plate (404), and the inner wall of the side plate (404) is threadedly connected to the outer wall of the clamping rod (405). One end of the clamping rod (405) is provided with a rotating handle, and the other end of the clamping rod (405) is rotatably connected to the inner wall of the clamping block (406). The top of the top extension plate of the U-shaped bracket (401) is provided with an abutting block (407), and a dial indicator (5) is arranged between the abutting block (407) and the hanging scale (402) on the top extension plate of the U-shaped bracket (401). The bottom of the bottom extension plate of the U-shaped bracket (401) is provided with a slider (408), and the outer wall of the slider (408) is slidably connected to the inner wall of the guide block (106).

6. The anti-cracking cement stabilized macadam dry shrinkage test detection device according to claim 5, characterized in that: The temperature-lowering component (6) includes a compressor (601) and a heat-conducting pipe (602). The compressor (601) is installed on the back of the detection box (101), and the output end of the compressor (601) is fixedly connected to one end of the heat-conducting pipe (602). The back of the heat-conducting pipe (602) is fixedly connected to the inner side wall of the detection box (101).

7. An anti-cracking cement stabilized macadam dry shrinkage test detection device according to claim 6, characterized in that: The temperature-raising component (7) includes a driving block (701), a driving motor (702), a fan (703), an electric heating grid (704), a duct (705) and a valve plate (706). The inner wall of the driving block (701) is fixedly connected to the outer wall of the duct (705) through bolts, and the inner wall of the driving block (701) is snap-connected to the outer wall of the driving motor (702). The outer wall of the output end of the driving motor (702) is snap-connected to the inner wall of the fan (703), and the outer wall of the output end of the driving motor (702) is rotatably connected to the inner wall of the electric heating grid (704). The outer wall of the electric heating grid (704) is fixedly connected to the inner wall of the duct (705), and one end of the duct (705) away from the electric heating grid (704) is fixedly connected to the right side of the detection box (101). The inner wall of one end of the duct (705) close to the detection box (101) is rotatably connected to the outer wall of the valve plate (706) through a torsion spring.

8. An anti-cracking cement stabilized macadam dry shrinkage test and detection device according to claim 5, characterized in that: A fitting groove is formed in the top of the detection box (101), and the shape and size of the fitting groove are both mutually matched with the shape and size of the abutting block (407). The top of the top extension plate of the U-shaped bracket (401) is movably abutted against the inner top wall of the detection box (101).

9. The dry shrinkage test detection equipment for crack-resistant cement stabilized macadam according to claim 7, characterized in that: The dehumidifier (104), humidifier (105), compressor (601), drive motor (702) and electric heating grid (704) are all electrically connected through a PLC control board.

10. A method of using the anti-cracking cement stabilized macadam dry shrinkage test detection equipment as described in claim 1, characterized in that, The method includes the following steps: S1: After drying the water droplets remaining on the outer wall of the sample, place the sample in the L-shaped support plate (403). Rotate the clamping rod (405) to fix the sample from both sides with the clamping block (406). Push the U-shaped bracket (401) into the test chamber (101), close the airtight door (103), and record the mass of the sample by observing the value on the hanging scale (402). S2: By rotating the adjustment disk (203), the adjustment disk (203) drives the worm (202) to rotate. The worm (202) drives the worm wheel (301) to rotate under the meshing force. The worm wheel (301) drives the threaded tube (302) to rotate. Under the meshing force and the limiting action of the guide rod (305), the threaded tube (302) can drive the threaded rod (303) to move upward. The threaded rod (303) drives the lifting platform (304) to pass through the L-shaped support plate (403) and abut against the bottom of the sample and continuously push the sample, so that the sample abuts against the input end of the dial indicator (5), and the pointer of the dial indicator (5) rotates to a specified position. S3: Control the operation of the dehumidifier (104), humidifier (105), compressor (601), drive motor (702) and electric heating grid (704) through the PLC control board, so that the internal air of the test chamber (101) reaches the specified standard, and the sample undergoes a dry shrinkage test in the test chamber (101). Determine the dry shrinkage length of the sample by observing the movement distance of the pointer of the dial indicator (5) driven by the sample after dry shrinkage. At the same time, rotate the worm (202) in the reverse direction to make the sample contact the L-shaped support plate (403) again. Record the mass of the sample after dry shrinkage by observing the hanging scale (402), and calculate the dry shrinkage degree of the sample through the corresponding formula.

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