Asphalt mixture test piece pretreatment device

Abstract

The utility model relates to the technical field of asphalt mixtures, and discloses an asphalt mixture test piece pretreatment device which comprises a device shell and a driving motor, a pipeline connector is fixedly arranged on the device shell, the pipeline connector is in threaded connection with a threaded lantern ring, the threaded lantern ring is coaxially arranged on the pipeline connector in a sleeved mode, and the driving motor is connected with the threaded lantern ring. A rubber ring is connected into the threaded lantern ring in an attached mode, a supporting base is fixed to the bottom of an inner cavity of the device shell, the supporting base is rotationally connected with supporting legs through bearings, the supporting legs are fixedly connected with a tray, a first limiting ring is fixedly installed at the top end of the tray, and a plurality of limiting rods are inserted into the first limiting ring. The pipeline connector is in threaded connection with the threaded lantern ring, the rubber ring is connected into the threaded lantern ring in an attached mode, the threaded lantern ring is rotated, the rubber ring is extruded in the moving process of the threaded lantern ring so that the water pipe and the air inlet pipe can be fixed, operation is more convenient, and detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of asphalt mixtures, in particular to a pretreatment device for asphalt mixture specimens. Background Technique

[0002] Asphalt mixture is a commonly used material for paving roads. The compactness of asphalt pavement represents a key index for the construction quality and service life of the road surface. Core sampling and testing in the test specimen section is the most commonly used method for compactness detection.

[0003] Existing pretreatment devices for asphalt mixture specimens often use high-speed rotation and blowing to quickly reduce the moisture content of the specimens to the target requirements. During the high-speed rotation process, the stability of the specimens cannot be maintained, and the specimens will shift in position due to centrifugal force, thus damaging the interior of the device. In addition, the insertion of the air inlet pipe and the water pipe is relatively inconvenient, affecting the detection efficiency of the specimens.

[0004] Therefore, we designed a pretreatment device for asphalt mixture specimens. Content of the Utility Model

[0005] The purpose of the utility model is to solve the problems in the prior art that the specimens are prone to position deviation and damage the interior of the device, and the insertion of the air inlet pipe and the water pipe is relatively inconvenient, and a pretreatment device for asphalt mixture specimens is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A pretreatment device for asphalt mixture specimens, including a device housing and a driving motor. A pipe interface is fixedly arranged on the device housing. The pipe interface is threadedly connected with a threaded collar. The threaded collar is coaxially sleeved on the pipe interface. A rubber ring is fitted and connected inside the threaded collar. A support seat is fixed at the bottom of the inner cavity of the device housing. The support seat is rotatably connected with a leg through a bearing. The leg is fixedly connected with a tray. A first limiting ring is fixedly installed at the top of the tray. A plurality of limiting rods are inserted on the first limiting ring. The two ends of the limiting rod are respectively fixedly connected with a second limiting ring and the tray through a plurality of nuts.

[0008] Preferably, a rotating groove block is fixedly arranged at the top of the driving motor. A pressing rod is movably installed on the device housing. The pressing rod is coaxially fixed with a clamping block. The clamping block and the rotating groove block are movably matched.

[0009] Preferably, the pressing rod is coaxially fixed with a connecting block. A handle is fixed at the top of the pressing rod. An anti-loosening tooth is fixed at the bottom of the pressing rod. The connecting block is connected to the top of the anti-loosening tooth through a compression spring.

[0010] Preferably, a top cover is installed on the device housing. Anti-disengagement buckles are fixedly arranged on both sides of the device housing. A "U"-shaped frame is fixed to the top of the top cover, and the drive motor is fixedly installed on the "U"-shaped frame.

[0011] Preferably, a buffer is fixed to the inner wall of the device housing. A plurality of high-speed nozzles are installed on the buffer. The buffer communicates with the outside through a pipeline interface, and a plurality of holes are formed in the bottom of the device housing.

[0012] Preferably, a curved groove is formed in the inner wall of the threaded collar. The diameter of the curved groove is larger than that of the pipeline interface and equal to the inner diameter of the rubber ring. The rubber ring is located in the curved groove.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, the pipeline interface is threadedly connected with a threaded collar, and a rubber ring is fitted and connected inside the threaded collar. By rotating the threaded collar, the rubber ring is extruded during the movement of the threaded collar to fix the water pipe and the air inlet pipe, which is more convenient to operate and improves the detection efficiency.

[0015] 2. In the present utility model, a plurality of limiting rods are inserted into the first limiting ring. The two ends of the limiting rods are respectively fixedly connected with a second limiting ring and a tray through a plurality of nuts. The specimen is limited by the first limiting ring and the second limiting ring, and the limiting rods provide connection, further improving the stability of the specimen and preventing the specimen from damaging the device due to high-speed rotation.

[0016] In summary, the present utility model is reasonably designed, which can not only make the fixation of the water pipe and the air inlet pipe more convenient, but also prevent the specimen from damaging the device due to high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the asphalt mixture specimen pretreatment device proposed by the present utility model;

[0018] Figure 2 is a partially enlarged view of area A of the asphalt mixture specimen pretreatment device proposed by the present utility model;

[0019] Figure 3 is a sectional view of the internal structure of the asphalt mixture specimen pretreatment device proposed by the present utility model;

[0020] Figure 4 is a sectional view of the main structure of the asphalt mixture specimen pretreatment device proposed by the present utility model.

[0021] In the figure: 1. Device housing; 2. Driving motor; 3. Rotating groove block; 4. Pressing rod; 5. Clamping block; 6. Compression spring; 7. Anti-loosening teeth; 8. Top cover; 9. Anti-disengagement buckle; 10. Tray; 11. First limiting ring; 12. Limiting rod; 13. Second limiting ring; 14. Buffer; 15. High-speed nozzle; 16. Threaded sleeve ring; 17. Rubber ring. Specific implementation mode

[0022] Refer to Figures 1 - 4 , the asphalt mixture specimen pretreatment device includes a device housing 1 and a driving motor 2. A pipeline interface is fixedly arranged on the device housing 1. The pipeline interface is threadedly connected with a threaded sleeve ring 16. The threaded sleeve ring 16 is coaxially sleeved on the pipeline interface. A rubber ring 17 is fitted and connected inside the threaded sleeve ring 16. When a water pipe or an air inlet pipe is inserted into the pipeline interface, at this time, the water pipe or the air inlet pipe forms friction with the rubber ring 17, so that the rubber ring 17 always remains fixed in position inside the threaded sleeve ring 16.

[0023] A curved surface groove is opened on the inner wall of the threaded sleeve ring 16. The diameter of the curved surface groove is larger than that of the pipeline interface and equal to the inner diameter of the rubber ring 17. The rubber ring 17 is located in the curved surface groove. When the threaded sleeve ring 16 is rotated, the threaded sleeve ring 16 moves horizontally. As the threaded sleeve ring 16 moves, the threaded end with the same diameter as the pipeline interface of the threaded sleeve ring 16 will start to contact the rubber ring 17. The movement of the threaded sleeve ring 16 makes the curved surface groove disengage from the rubber ring 17. During the process that the curved surface groove disengages from the rubber ring 17 and the threaded end contacts the rubber ring 17, because the diameter of the rubber ring 17 is larger than that of the threaded end, the threaded end squeezes the rubber ring 17, causing the rubber ring 17 to deform and at the same time tightly fit the water pipe and the air inlet pipe, thereby fixing the water pipe and the air inlet pipe, making the insertion of the water pipe and the air inlet pipe more convenient. When it is necessary to remove the water pipe and the air inlet pipe, only need to rotate the threaded sleeve ring 16 in the reverse direction. At this time, the rubber ring 17 is no longer stressed and returns to its state, and then the user can directly pull out the water pipe and the air inlet pipe.

[0024] A support seat is fixed at the bottom of the inner cavity of the device housing 1. The support seat is rotatably connected with a leg through a bearing. The leg is fixedly connected with a tray 10. The specimen is placed on the tray 10, and the leg and the tray 10 provide support for the specimen.

[0025] A first limiting ring 11 is fixedly installed at the top end of the tray 10. The two ends of the limiting rod 12 are respectively fixedly connected with a second limiting ring 13 and the tray 10 through a plurality of nuts. Since the size of the specimen is fixed at 100 mm, the inner diameters of the first limiting ring 11 and the second limiting ring 13 also adopt 100 mm, so that the first limiting ring 11 and the second limiting ring 13 can closely fit the two ends of the specimen and limit and fix the two ends of the specimen.

[0026] Furthermore, the limiting rod 12, the first limiting ring 11 and the second limiting ring 13 can be removed by rotating the nut, so that the specimen can be placed normally and the user can adjust the position of the specimen conveniently.

[0027] A plurality of limiting rods 12 are inserted on the first limiting ring 11, and the limiting rods 12 connect the first limiting ring 11 and the second limiting ring 13, so that the first limiting ring 11 and the second limiting ring 13 are connected. The limiting rods 12 prevent the specimen from circumferential deviation and improve the functions of the first limiting ring 11 and the second limiting ring 13, further improving the stability of the specimen during high-speed rotation.

[0028] The device housing 1 is installed with a top cover 8, and anti-drop buckles 9 are fixedly arranged on both sides of the device housing 1. After the test piece is fixed, the top cover 8 is covered and the anti-drop buckles 9 are flipped over. The anti-drop buckles 9 include a buckle plate and vortex springs on both sides of the buckle plate. The buckle plate presses the top cover 8 through the stretching action of the vortex spring to prevent the top cover 8 from detaching from the device housing 1 during the high-speed rotation of the clamping rod 4.

[0029] A “U”-shaped frame is fixed on the top of the top cover 8 , and the drive motor 2 is fixedly mounted on the “U”-shaped frame, and the “U”-shaped frame plays a supporting role for the drive motor 2 .

[0030] A connecting block is coaxially fixed to the clamping rod 4, a handle is fixed to the top end of the clamping rod 4, and an anti-loosening tooth 7 is fixed to the bottom end of the clamping rod 4. The connecting block is connected to the top end of the anti-loosening tooth 7 through a compression spring 6. By pulling up the clamping rod 4 with the handle, the clamping rod 4 drives the anti-loosening tooth 7 to move up synchronously, and the anti-loosening tooth 7 squeezes the compression spring 6.

[0031] A rotating slot block 3 is fixedly provided at the top of the driving motor 2, and a clamping rod 4 is movably installed on the device shell 1. A clamping block 5 is coaxially fixed to the clamping rod 4. The clamping block 5 and the rotating slot block 3 are movably matched. When the clamping rod 4 is loosened, the compression spring 6 is not subjected to force and performs a reset movement. During the movement, the clamping block 5 and the anti-loosening tooth 7 are driven to move synchronously. The anti-loosening tooth 7 is connected with the test piece. The clamping block 5 is inserted into the rotating slot block 3. The clamping block 5 is cross-shaped and completely matches the cross groove of the rotating slot block 3. At this time, the driving motor 2 is started, and the driving motor 2 drives the rotating slot block 3 to rotate. The rotating slot block 3 drives the clamping rod 4 to move synchronously. The clamping rod 4 drives the test piece to rotate at high speed. Under high-speed rotation, the moisture in the test piece is thrown out by centrifugal force.

[0032] It should be noted that, since the two ends of the compression spring 6 are respectively connected to the connection block and the anti-loosening tooth 7, and the legs are connected to the bearing, the compression spring 6 and the legs also participate in the rotation of the specimen and will not affect the rotation of the specimen.

[0033] A buffer 14 is fixed to the inner wall of the device housing 1. A plurality of high-speed nozzles 15 are installed on the buffer 14. The buffer 14 is connected to the outside through a pipe interface. By connecting a water pipe to the pipe interface, water flows through the buffer 14 and the high-speed nozzles 15 to form high-pressure water for cleaning the floating soil and loose particles on the test piece.

[0034] Furthermore, connect an air pipe to the pipe interface. Under the action of the buffer 14 and the high-speed nozzles 15, the air flow forms high-pressure air, and the high-pressure air dries the test piece. When there is no water leaking from the bottom water leakage hole for a long time, weigh it every hour after drying. If the weights are within the stable range for three consecutive times, it can be considered that the treatment of the test piece is completed. After opening the cover and taking out the test piece, a formal compaction degree measurement experiment can be carried out.

[0035] A plurality of holes are provided at the bottom of the device housing 1, and the holes are used for water leakage and air flow out.

[0036] The working principle of the present utility model is as follows: Insert the water pipe and the air inlet pipe into the pipe interface, rotate the threaded collar 16, and the threaded collar 16 squeezes the rubber ring 17 to make it fit tightly with the water pipe and the air inlet pipe, thereby completing the fixation of the water pipe and the air inlet pipe. The first limiting ring 11 and the second limiting ring 13 limit and fix both ends of the test piece, and the limiting rod 12 provides connectivity for the first limiting ring 11 and the second limiting ring 13, so that the test piece remains stable during rotation.

[0037] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. Asphalt mixture specimen pretreatment device, comprising a device housing (1) and a drive motor (2), characterized in that, A pipe interface is fixedly arranged on the device housing (1). A threaded collar (16) is threadedly connected to the pipe interface. The threaded collar (16) is coaxially sleeved on the pipe interface. A rubber ring (17) is fitted and connected inside the threaded collar (16). A support seat is fixed at the bottom of the inner cavity of the device housing (1). The support seat is rotationally connected to a support leg through a bearing. The support leg is fixedly connected to a tray (10). A first limiting ring (11) is fixedly installed at the top end of the tray (10). A plurality of limiting rods (12) are inserted on the first limiting ring (11). The two ends of the limiting rod (12) are respectively fixedly connected to a second limiting ring (13) and the tray (10) through a plurality of nuts.

2. The asphalt mixture specimen pre-treatment device according to claim 1, characterized in that, A rotating groove block (3) is fixedly arranged at the top end of the driving motor (2). A pressing rod (4) is movably installed on the device housing (1). A clamping block (5) is coaxially fixed to the pressing rod (4). The clamping block (5) and the rotating groove block (3) are movably matched.

3. The asphalt mixture specimen pretreatment device according to claim 2, characterized in that, A connecting block is coaxially fixed to the pressing rod (4). A handle is fixed at the top end of the pressing rod (4). An anti-loosening tooth (7) is fixed at the bottom end of the pressing rod (4). The connecting block is connected to the top end of the anti-loosening tooth (7) through a compression spring (6).

4. The asphalt mixture specimen pretreatment device according to claim 1, characterized in that, The device housing (1) is provided with a top cover (8). Anti-disengagement buckles (9) are fixedly arranged on both sides of the device housing (1). A "U"-shaped frame is fixed at the top end of the top cover (8). The driving motor (2) is fixedly installed on the "U"-shaped frame.

5. The asphalt mixture specimen pretreatment device according to claim 1, characterized in that, A buffer (14) is fixed on the inner wall of the device housing (1). A plurality of high-speed spray nozzles (15) are installed on the buffer (14). The buffer (14) communicates with the outside through a pipe interface. A plurality of holes are opened at the bottom of the device housing (1).

6. The asphalt mixture specimen pretreatment device according to claim 1, characterized in that, A curved surface groove is formed on the inner wall of the threaded collar (16). The diameter of the curved surface groove is larger than that of the pipe interface and equal to the inner diameter of the rubber ring (17). The rubber ring (17) is located in the curved surface groove.

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