Asphalt rotary shear failure experimental device

Abstract

The utility model discloses an asphalt rotary shear failure experimental device, and relates to the technical field of asphalt performance testing. The device comprises a test box body, a top panel, a heating cylinder, a fixed plate and a fixed disc, an embedded plate is movably connected in a movable opening, the fixed disc is fixed on the end face, flush with the test box body, of the embedded plate, the fixed plate is arranged on one side of the test box body, and electric push rods are symmetrically fixed on the side, close to the test box body, of the fixed plate along the center line in the vertical direction. The telescopic ends of the two electric push rods are fixed to the fixing disc, a top panel is hinged to the upper portion in the test box body, air outlets are symmetrically formed in the top of the top panel in a penetrating mode along the center line parallel to the short edge, and a heating cylinder is fixed to the center of the interior of the top panel in a penetrating mode. Through the arrangement of the test box body, the top panel, the heating cylinder, the fixed plate and the fixed disc, the problems that the asphalt rotary shear failure test device is easy to cause non-uniform temperature of asphalt and broken asphalt blocks after test are inconvenient to clean are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt performance testing, in particular to an asphalt rotary shear failure experimental device. Background Art

[0002] At present, with the increasing demand for road transportation, the demand for highways is also increasing day by day. More than 90% of the pavements are made of asphalt concrete materials. However, many transport vehicles are overloaded to save costs. Over a long period of time, various damages such as rutting and cracking have occurred on the asphalt pavement. A large number of studies have shown that the shear failure of asphalt concrete is one of the main causes of rutting and cracking of asphalt pavement, and shear flow deformation accounts for more than 80% of the total rutting deformation. Therefore, it is necessary to consider the shear performance of asphalt concrete. It is necessary to test the shearing performance of asphalt concrete by a test device until the asphalt is destroyed, and the torque, pressure and other data of the asphalt are subjected to. However, it still has the following disadvantages in actual use:

[0003] In order to simulate the high-temperature road environment during vehicle driving, the asphalt rotation shear failure test device needs to heat the asphalt under test. The air in the test device is directly heated by the heater. The air has no convection, and the temperature in the test device itself is uneven, which will cause uneven heating, and easily cause uneven temperature of the asphalt block under test, resulting in large errors in the test results.

[0004] When testing the asphalt rotary shear failure test device, the asphalt block under test needs to be clamped, then pressed and rotated so that the device receives shear force until the asphalt block under test is destroyed, thus achieving the purpose of the test. However, after the asphalt block is destroyed, a large number of fragments will be produced. After the test, the broken asphalt blocks are easy to remain in the test device, and they need to be cleaned carefully by manual labor during cleaning. Utility Model Content

[0005] The purpose of the utility model is to provide an asphalt rotation shear failure test device, which solves the problem that the asphalt rotation shear failure test device easily causes uneven temperature of the asphalt and is inconvenient to clean up the broken asphalt blocks after the test by arranging a test box, a top panel, a heating cylinder, a fixing plate and a fixing disk.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses an asphalt rotary shear failure test device, comprising a test box, a top panel, a heating cylinder, a fixed plate and a fixed disk. A movable opening is provided through one side of the test box, a fitting plate is movably connected in the fitting plate, a fixed disk is fixed on the end surface of the fitting plate flush with the test box, a fixing plate is arranged on one side of the test box, the fixing plate and the fixed disk are located on the same side of the test box, an electric push rod is symmetrically fixed to one side of the fixing plate close to the test box along the vertical center line, the telescopic ends of the two electric push rods are fixed to the fixed disk, and the fixing plate is provided on one side of the test box. A top panel is hingedly connected to the upper part of the test box, and air outlets are symmetrically opened on the top of the top panel along a center line parallel to the short side. A heating cylinder is fixed through the center of the top panel. When working, the cylindrical asphalt block to be tested is accommodated in the test box for testing. The top of the test box is closed by the top panel, so that the state of the cylindrical asphalt block in the test box can be observed during the test. The air is heated by the heating cylinder and then blown into the test box. The electric push rod that drives the movement of the fixed disk is connected through the fixed plate, and the movement of the fixed disk is driven by the electric push rod.

[0008] Furthermore, a chuck is rotatably connected to the center of one side of the inner wall of the test box away from the movable opening, a rotating motor is fixed to the side of the test box away from the fixed plate, the output end of the rotating motor is fixed to the end of the chuck away from the engaging plate, and the test box is clamped by the chuck after the asphalt block enters.

[0009] Furthermore, a temperature-sensitive switch is fixed on one side of the inner wall of the two air outlets in the top panel close to the heating tube, a baffle is fixed on one side of the top of the top panel close to the fixed plate, a handle is fixed in the middle of the top of the baffle, and the top panel controls the switch of the drive motor and the heater through the temperature-sensitive switch.

[0010] Furthermore, a driving motor is fixed to the top of the heating tube, a driving shaft is fixed to the output end of the driving motor, and the driving shaft is movably connected to the top of the heating tube, a fan frame is fixed to the bottom end of the driving shaft, a heater is fixed on the inner wall of the heating tube below the fan frame, and air inlets are opened in a circular array on the circumference of the heating tube above the top panel. The driving motor drives the driving shaft to rotate, thereby driving the fan frame to rotate. When the fan frame rotates, air is sucked in from the inlet and blown onto the working heater, so that the air is heated and transported to the test chamber.

[0011] Furthermore, connecting columns are fixed at four corners of the fixing plate close to the test box, and one end of the four connecting columns away from the fixing plate is fixed to the test box, and the fixing plate is connected to the test box through the connecting columns.

[0012] Furthermore, a sensor box is fixed through the inside of the mosaic plate, and a chuck 2 is fixed to the output end of the sensor box. The mosaic plate measures the pressure and torque received by the cylindrical asphalt block on the chuck 2 through the sensor box therein.

[0013] The utility model has the following beneficial effects:

[0014] The utility model solves the problem that the asphalt rotation shear destruction experimental device easily causes uneven temperature of asphalt by arranging a test box, a top panel and a heating cylinder. The driving motor and the heater are started, and the power generated by the driving motor controls the rotation of the driving shaft. When the driving shaft rotates, the fan frame is driven to rotate. When the fan frame rotates, air is sucked in from the air inlet and pushed onto the heater, so that the air is heated to 60 degrees when passing through the heater, and then transported to the test box. After circulating in the test box, it is discharged through the air outlet. It keeps working for 50 minutes, so that the temperature of various places in the test box and the temperature of the cylindrical asphalt block reach 60 degrees. At this time, the temperature sensitive switch is started, so that the temperature at the air outlet position is always maintained at about 60 degrees, so that when working, the temperature of various places in the test box can reach the test degree, and the temperature in the test box can be maintained during the test to ensure the uniform temperature of the test.

[0015] The utility model solves the problem of the inconvenience of cleaning the broken asphalt blocks after the test of the asphalt rotary shear destruction experimental device by arranging a test box, a fixed plate and a fixed disk. After the test, the electric push rod is started to make the fixed disk leave the test box, the handle is pulled to open the test box, the chuck one and the chuck two are loosened, the broken asphalt blocks are taken out from the chuck two, and the asphalt blocks in the test box are cleaned through the movable opening, so that it is more convenient to clean the broken asphalt blocks after the test of the asphalt rotary shear destruction experimental device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A stereoscopic diagram of the assembly structure of an asphalt rotational shear failure test device;

[0017] Figure 2 This is a three-dimensional diagram of the test box structure;

[0018] Figure 3 It is a three-dimensional diagram of the top panel structure;

[0019] Figure 4 It is a three-dimensional diagram of the cross-sectional structure of the heating tube;

[0020] Figure 5 It is a three-dimensional diagram of the fixed plate structure;

[0021] Figure 6 It is a three-dimensional diagram of the fixed disk structure;

[0022] Figure 7 This is a three-dimensional diagram of the rear structure of the test box.

[0023] Reference numerals:

[0024] 1. Test box; 101. Movable opening; 102. Chuck 1; 103. Rotating motor; 2. Top panel; 201. Air outlet; 202. Temperature switch; 203. Baffle; 204. Handle; 3. Heating tube; 301. Driving motor; 302. Driving shaft; 303. Fan frame; 304. Heater; 305. Air inlet; 4. Fixing plate; 401. Electric push rod; 402. Connecting column; 5. Fixing plate; 501. Fitting plate; 502. Sensor box; 503. Chuck 2. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] See also Figure 1-7 As shown, the utility model is an asphalt rotation shear failure test device, including a test box 1, a top panel 2, a heating cylinder 3, a fixing plate 4 and a fixing disk 5. A movable opening 101 is opened through one side of the test box 1. When the test box 1 is working, it provides a closed test space for the asphalt block to be tested. The test box 1 is movably connected to a mosaic plate 501 through the movable opening 101. A mosaic plate 501 is movably connected in the movable opening 101. The mosaic plate 501 fixes a sensor box 502 therein to provide a function for the asphalt to be tested to enter the test box 1. A fixing disk 5 is fixed on the end surface of the mosaic plate 501 flush with the test box 1. The fixing disk 5 connects the mosaic plate 501 with the electric push rod 401. A fixing plate 4 is provided on one side of the test box 1. The fixing plate 4 and the fixing disk 5 are located at On the same side of the test box 1, an electric push rod 401 is symmetrically fixed along the vertical center line on one side of the fixed plate 4 close to the test box 1. The telescopic ends of the two electric push rods 401 are fixed to the fixed plate 5. The electric push rod 401 is fixed to the fixed plate 4. When working, it controls the relative position between the fixed plate 5 and the test box 1. The upper part of the test box 1 is hinged with a top panel 2, which closes the top of the test box 1. The top panel 2 is transparent, and the state of the tested cylindrical asphalt block can be observed during the test. The top of the top panel 2 is symmetrically penetrated along the center line parallel to the short side with an air outlet 201, and the air blown into the test box 1 by the heating tube 3 is discharged through the air outlet 201. A heating tube 3 is fixed to the center of the top panel 2, and the heating tube 3 heats the air and then inputs it into the test box 1.

[0027] Among them Figure 1 , 2As shown in Figures 7 and 8, a chuck 102 is rotatably connected to the center of one side of the inner wall of the test box 1 away from the movable opening 101, a rotating motor 103 is fixed to the side of the test box 1 away from the fixed plate 4, and the output end of the rotating motor 103 is fixed to the end of the chuck 102 away from the interlocking plate 501. When the test box 1 is working, one end of the asphalt block to be tested entering the test box 1 is clamped by the chuck 102.

[0028] Among them Figure 1 , 3 As shown, a temperature-sensitive switch 202 is fixed on one side of the inner wall of the two air outlets 201 in the top panel 2 close to the heating tube 3, a baffle 203 is fixed on one side of the top of the top panel 2 close to the fixed plate 4, and a handle 204 is fixed on the middle of the top of the baffle 203. The air outlet temperature in the air outlet 201 on the top panel 2 is detected by the temperature-sensitive switch 202. When the air outlet temperature in the air outlet 201 is too low, the temperature-sensitive switch 202 is turned on, the heater 304 and the drive motor 301 are started, and the top panel 2 is limited in position by the baffle 203, and the top panel 2 can be opened by pulling the handle 204 on the baffle 203.

[0029] Among them Figure 1 , 4 As shown, a driving motor 301 is fixed to the top of the heating cylinder 3, a driving shaft 302 is fixed to the output end of the driving motor 301, and the driving shaft 302 is movably connected to the top of the heating cylinder 3, a fan frame 303 is fixed to the bottom end of the driving shaft 302, a heater 304 is fixed on the inner wall of the heating cylinder 3 below the fan frame 303, and an air inlet 305 is opened in a circular array on the circumference of the heating cylinder 3 above the top panel 2. The power generated by the driving motor 301 controls the rotation of the driving shaft 302. When the driving shaft 302 rotates, the fan frame 303 is driven to rotate. When the fan frame 303 rotates, air is sucked in from the air inlet 305 and pushed to the heater 304, so that the air is heated by the heater 304.

[0030] Among them Figure 1 , 5 As shown, connecting columns 402 are fixed at the four corners of the fixing plate 4 close to the test box 1 , and the ends of the four connecting columns 402 away from the fixing plate 4 are fixed to the test box 1 , and the fixing plate 4 is connected to the test box 1 through the connecting columns 402 .

[0031] Among them Figure 1 , 6As shown, a sensor box 502 is fixed through the interlocking plate 501, and a chuck 2 503 is fixed to the output end of the sensor box 502. The interlocking plate 501 tests the torque and pressure of the chuck 2 503 through the sensor box 502 and transmits the results to an external PC, thereby measuring the torque and pressure of the asphalt block. The sensor box 502 clamps the asphalt block under test thereon through the chuck 2 503.

[0032] The specific working principle of the utility model is as follows: when working, first pull the handle 204, lift the top panel 2, open the upper part of the test box 1, put the prepared cylindrical asphalt block on the chuck 2 503, clamp it through the chuck 2 503, and then start the electric push rod 401, the electric push rod 401 drives the fixed plate 5 to move, so that the fixed plate 5 moves toward the test box 1, and the embedded plate 501 enters the movable opening 101 on the test box 1, and the cylindrical asphalt block on the chuck 2 503 moves to contact the chuck 1 102, and then through After the chuck 102 is clamped, the electric push rod 401 is started to press the cylindrical asphalt block, so that the cylindrical asphalt block is subjected to the pressure required for the test, which is transmitted to the PC through the sensor box 502, so that the operator knows that the setting of the cylindrical asphalt block is completed, and then the handle 204 is held to turn the top panel 2 back to the top of the test box 1, and supported by the baffle 203, and then the drive motor 301 and the heater 304 are started. The power generated by the drive motor 301 controls the drive shaft 302 to rotate. When the drive shaft 302 rotates, the fan frame 303 is driven. The fan frame 303 rotates, and when the fan frame 303 rotates, air is sucked in from the air inlet 305 and pushed onto the heater 304, so that the air is heated to 60 degrees when passing through the heater 304, and then transported to the test box 1. After circulating in the test box 1, the air is discharged through the air outlet 201. It keeps working for 50 minutes, so that the temperature of various places in the test box 1 and the temperature of the cylindrical asphalt block reach 60 degrees. At this time, the temperature sensitive switch 202 is started, so that the temperature at the air outlet 201 is always maintained at about 60 degrees, and the rotating motor 103 is started, and the rotating motor 103 rotates. The chuck 102 is driven to rotate until the chuck 102 drives the cylindrical asphalt block to rotate and break. During this process, the pressure and torque information received by the asphalt determines the shear and pressure that the asphalt can withstand, and is transmitted to the PC through the sensor box 502. Then the electric push rod 401 is started again to make the fixed plate 5 leave the test box 1, and the handle 204 is pulled to open the test box 1, and the chuck 102 and the chuck 2 503 are loosened, and the broken asphalt block is removed from the chuck 2 503, and the asphalt block in the test box 1 is cleaned through the movable port 101.

[0033] The above are only preferred embodiments of the present invention and do not limit the present invention. Any modification to the technical solutions recorded in the aforementioned embodiments and any equivalent replacement of some of the technical features therein, any modification, equivalent replacement, and improvement made are all within the protection scope of the present invention.

Claims

1. An asphalt rotational shear failure test device, comprising a test box (1), a top panel (2), a heating cylinder (3), a fixing plate (4) and a fixing disk (5), characterized in that: A movable opening (101) is provided through one side of the test box (1), a mating plate (501) is movably connected in the movable opening (101), a fixing plate (5) is fixed on the end surface of the mating plate (501) flush with the test box (1), a fixing plate (4) is provided on one side of the test box (1), the fixing plate (4) and the fixing plate (5) are located on the same side of the test box (1), electric push rods (401) are symmetrically fixed along the vertical center line on the side of the fixing plate (4) close to the test box (1), the telescopic ends of the two electric push rods (401) are fixed to the fixing plate (5), a top panel (2) is hingedly connected to the upper part of the test box (1), the top of the top panel (2) is symmetrically provided with air outlets (201) along the center line parallel to the short side, and a fixing plate (4) is provided in the center of the top panel (2) A heating tube (3) is fixed thereon; a temperature-sensitive switch (202) is fixed on one side of the inner wall of the two air outlets (201) in the top panel (2) close to the heating tube (3); a baffle (203) is fixed on one side of the top of the top panel (2) close to the fixing plate (4); a handle (204) is fixed in the middle of the top of the baffle (203); a driving motor (301) is fixed at the top of the heating tube (3); a driving shaft (302) is fixed at the output end of the driving motor (301), and the driving shaft (302) is movably connected to the top of the heating tube (3); a fan frame (303) is fixed at the bottom end of the driving shaft (302); a heater (304) is fixed on the inner wall of the heating tube (3) below the fan frame (303); and air inlets (305) are provided in a circular array on the circumference of the heating tube (3) above the top panel (2).

2. The asphalt rotational shear failure test device according to claim 1 is characterized by: A chuck 1 (102) is rotatably connected to the center of a side of the inner wall of the test box (1) away from the movable opening (101), and a rotating motor (103) is fixed to the side of the test box (1) away from the fixed plate (4), and the output end of the rotating motor (103) is fixed to an end of the chuck 1 (102) away from the interlocking plate (501).

3. The asphalt rotational shear failure test device according to claim 1 is characterized by: Connecting columns (402) are fixed at four corners of the fixing plate (4) on one side close to the test box (1), and ends of the four connecting columns (402) away from the fixing plate (4) are fixed to the test box (1).

4. The asphalt rotational shear failure test device according to claim 1 is characterized by: A sensor box (502) is fixed through the inside of the interlocking plate (501), and a second chuck (503) is fixed to the output end of the sensor box (502).

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