Prefabricated asphalt pavement anti-rubbing detection device

Abstract

The utility model discloses a prefabricated asphalt pavement anti-rubbing detection device which comprises a base, a lifting mechanism, a supporting mechanism, a test mold and a clamping mechanism, a supporting frame is fixedly arranged at the top of the base, a first motor is fixedly arranged on the supporting frame, the lifting mechanism comprises a connecting rod and a hydraulic rod, the hydraulic rod is fixedly arranged at the top of the supporting frame in the vertical direction, and the clamping mechanism is fixedly arranged on the connecting rod. The bottom of the connecting rod is fixedly connected with the top of the hydraulic rod, the supporting mechanism comprises a vertical rod and a U-shaped plate, the vertical rod slidably penetrates through the top of the supporting frame, the top of the vertical rod is rotatably connected with the connecting rod, the U-shaped plate is arranged below the vertical rod, a tire is rotatably arranged in the U-shaped plate, the test mold is fixedly arranged at the top of the base, and a test piece is arranged at the top of the test mold. And the clamping mechanism is arranged above the base. Through the arrangement, the purpose of simulating the running of a vehicle on a road surface is achieved, and meanwhile, the twisting of a tire in situ can be simulated, so that the anti-rubbing performance of a test piece can be detected by the anti-rubbing performance testing device disclosed by the utility model.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering detection, and particularly relates to a prefabricated asphalt pavement anti-rubbing detection device. Background Art

[0002] The prefabricated asphalt pavement is a new type of pavement structure proposed to solve the problems existing in the traditional on-site cast asphalt pavement. By processing and dividing the road surface slabs in the prefabrication yard and then transporting them to the site for assembly, the programmed construction of the asphalt pavement is realized. To scientifically and reasonably evaluate the anti-rubbing performance of the prefabricated asphalt pavement, a prefabricated asphalt pavement anti-rubbing detection device is needed.

[0003] Chinese Patent with the publication number CN205388564U discloses an anti-stripping performance detection device for asphalt pavement. The solution includes a base, on which two lifting columns are installed. A sliding rod is installed between the two lifting columns, and a first slider is installed on the sliding rod. The first slider is connected with a vertical guide rod, and the lower end of the guide rod is connected with a friction device. A friction test piece is arranged below the friction device. The above solution uses the lifting sliding rod to make the friction device abut against the friction test piece, and by sliding the first slider, it simulates the vehicle driving on the road surface to evaluate the anti-stripping performance of the asphalt pavement.

[0004] During the use of the above solution, to simulate the vehicle driving on the road surface, it is necessary to slide the first slider along the sliding rod, which requires the sliding rod to have a certain length, thus resulting in a relatively large floor area of the above solution. Summary of the Utility Model

[0005] The utility model aims to provide a prefabricated asphalt pavement anti-rubbing detection device to solve the problem of relatively large floor area existing in the above solution.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A prefabricated asphalt pavement anti-rubbing detection device, comprising a base, a lifting mechanism, a support mechanism, a test mold and a clamping mechanism. A support frame is fixedly arranged at the top of the base, and a first motor is fixedly arranged on the support frame. The lifting mechanism comprises a connecting rod and a hydraulic rod. The hydraulic rod is fixedly arranged vertically at the top of the support frame, and the bottom of the connecting rod is fixedly connected to the top of the hydraulic rod. The support mechanism comprises a vertical rod and a U-shaped plate. The vertical rod slidably penetrates through the top of the support frame, and the first motor can drive the vertical rod to rotate relative to the support frame through a transmission component. The top of the vertical rod is rotatably connected to the connecting rod. The U-shaped plate is arranged below the vertical rod, and a tire is rotatably arranged in the U-shaped plate. A second motor is fixedly arranged on the outer side wall of the U-shaped plate, and the second motor is used to drive the tire to rotate. The test mold is fixedly arranged at the top of the base, a test piece is arranged on the top of the test mold, and the center of the test mold and the axis of the vertical rod are on the same straight line. The clamping mechanism is arranged above the base and can fix the test piece on the top of the test mold.

[0008] The principle and effect of this technical solution:

[0009] Before the experiment starts, measure the weight of the test piece, and use a pendulum friction coefficient tester to measure the friction coefficient. Then fix the test mold on the top of the base, and use the clamping mechanism to fix the test piece on the top of the test mold. Lower the connecting rod of the lifting mechanism, and then lower the vertical rod, the U-shaped plate and the tire until the tire abuts against the test piece. Drive the second motor to drive the tire to rotate along its axial direction to simulate the vehicle driving on the road surface. After a period of time, take out the test piece, clean the residue on the surface of the test piece, weigh it again and use the pendulum friction coefficient tester to measure the friction coefficient again, so as to judge the ability of the test piece to resist tire friction.

[0010] Or drive the first motor to drive the vertical rod to rotate, and then drive the tire to rotate along the axial direction of the vertical rod. Twist 360° clockwise at a constant speed, stabilize for 5s, then twist 360° counterclockwise in the reverse direction, stabilize for 5s, and then twist 2 times according to the above process to simulate the tire twisting in place. After twisting back and forth 3 times, take out the test piece, clean the residue on the surface of the test piece, weigh it again and use the pendulum friction coefficient tester to measure the friction coefficient again, so as to judge the ability of the test piece to resist tire friction.

[0011] Through the above settings, the tire rotates along its axial direction and rubs against the test piece, achieving the purpose of simulating the vehicle driving on the road surface while reducing the floor area. At the same time, the tire rotates along the axial direction of the vertical rod relative to the test piece, achieving the purpose of simulating the tire twisting in place, enabling the utility model to detect the anti-rubbing performance of the test piece.

[0012] In the present utility model, a temperature control box is further included. The temperature control box is fixedly arranged on the top of the base, and an opening is arranged on the front wall of the temperature control box. A sealing door is hinged at the opening. The vertical rod slidably penetrates through the top of the temperature control box and can rotate relative to the temperature control box. The U-shaped plate, the test mold and the clamping mechanism are located inside the temperature control box.

[0013] The principle and effect of this technical solution:

[0014] After placing the test piece on the top of the test mold and fixing it with the clamping mechanism, the temperature control box heats the inside to 60°C to 80°C, and measures the friction coefficient with a pendulum friction coefficient tester after keeping warm for two hours. After the test is completed, keep warm for another 30 minutes to simulate the experiment of a vehicle driving on the road surface or the experiment of a tire twisting in place.

[0015] Through the above settings, a suitable temperature environment can be created for various experiments, and the accuracy of the detection results can be improved.

[0016] In the present utility model, the clamping mechanism includes guide rods and a pressing plate. Two guide rods are symmetrically arranged and are respectively fixedly arranged on the top of the base along the vertical direction. Both ends of the pressing plate are slidably sleeved on the two guide rods. A tension spring is sleeved outside the guide rods, and the tension springs are respectively connected to the base and the pressing plate. The pressing plate has a channel that penetrates up and down.

[0017] The principle and effect of this technical solution:

[0018] First, lift the pressing plate to stretch the tension spring to make it have elasticity, fix the test mold at the designated position on the top of the base, and place the test piece on the top of the test mold. Then release the pressing plate, and the pressing plate moves downward under the action of the tension spring until the pressing plate presses the test piece tightly.

[0019] Through the above settings, the purpose of fixing the test piece on the top of the test mold by the clamping mechanism is achieved.

[0020] In the present utility model, a rib portion is arranged on the side wall of the vertical rod below the connecting rod. The top of the support frame is rotatably penetrated by a first rod sleeve, and the first rod sleeve is slidably sleeved on the vertical rod. The transmission assembly includes a toothed ring and a gear. The toothed ring is fixedly sleeved on the first rod sleeve, and the gear is fixedly arranged at the end of the output shaft of the first motor and meshes with the toothed ring.

[0021] The principle and effect of this technical solution:

[0022] When driving the connecting rod to move downward, the vertical rod, the U-shaped plate and the tire move downward accordingly. At this time, the vertical rod slides downward relative to the first rod sleeve. When the tire abuts against the test piece, the first motor is driven to make the gear rotate. Since the gear meshes with the toothed ring, the toothed ring and the first rod sleeve are driven to rotate, and the first rod sleeve drives the vertical rod to rotate along its axial direction.

[0023] With the above settings, the purpose of driving the tire to rotate along the axial direction of the vertical rod by the first motor is achieved.

[0024] In the present utility model, a pressure sensor is fixedly arranged at the bottom of the vertical rod, and the top of the U-shaped plate is fixedly connected to the bottom of the pressure sensor.

[0025] In the present utility model, a torque sensor is serially arranged on the vertical rod.

[0026] With the above settings, the first motor and the hydraulic rod are adjusted according to the values of the torque sensor and the pressure sensor to accurately simulate the scenarios of vehicle driving or tire rotation.

[0027] In the present utility model, the test mold has an inner cavity with an open top, and a steel ball filling layer is arranged in the inner cavity. With the above settings, it is possible to simulate the vertical, axial torsional shear displacements generated inside the test piece after the subbase under the road surface is stressed on the surface of the test piece, making the surface of the test piece to be tested in an unfavorable state of rubbing action, so as to evaluate the anti-rubbing performance of the precast asphalt pavement.

[0028] In the present utility model, rubber strips are fixedly arranged at the bottom of the pressing plate on the outer periphery of the channel. With the above settings, the friction between the test piece and the pressing plate can be increased to prevent the test piece from displacing during the experiment.

[0029] In the present utility model, a rotating shaft is rotatably inserted into the U-shaped plate, the tire is fixedly sleeved on the rotating shaft, and one end of the rotating shaft is in transmission connection with the output end of the second motor. With the above settings, the purpose of driving the tire to rotate along its axial direction by the second motor is achieved.

[0030] In the present utility model, the test mold and the base are fixedly connected by fastening bolts. With the above settings, the purpose of fixedly arranging the test mold on the top of the base is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is an axonometric view of the present utility model;

[0032] Figure 2 is an axonometric sectional view of the present utility model;

[0033] Figure 3 is Figure 2 the enlarged view at A in

[0034] Figure 4 is a partial front sectional view of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The present utility model will be further described in detail below in conjunction with the drawings and embodiments:

[0036] The reference numerals in the accompanying drawings of the specification include: 10, base; 11, support frame; 12, first motor; 13, first rod sleeve; 21, connecting rod; 22, hydraulic rod; 31, vertical rod; 32, U-shaped plate; 321, tire; 322, second motor; 323, rotating shaft; 40, test mold; 41, steel ball filling layer; 51, guide rod; 511, tension spring; 52, pressing plate; 521, channel; 522, rubber strip; 60, temperature control box; 61, sealing door; 62, second rod sleeve; 71, gear; 72, toothed ring; 81, torque sensor; 82, pressure sensor; 90, fastening bolt; 100, test piece.

[0037] As shown in the Figures 1-4 accompanying drawings, the present utility model discloses a prefabricated asphalt pavement anti-rubbing detection device, which includes a base 10, a lifting mechanism, a support mechanism, a test mold 40 and a clamping mechanism. A support frame 11 is fixedly arranged on the top of the base 10, and a first motor 12 is fixedly arranged on the support frame 11. The lifting mechanism includes a connecting rod 21 and a hydraulic rod 22. The hydraulic rod 22 is fixedly arranged vertically on the top of the support frame 11, and the bottom of the connecting rod 21 is fixedly connected to the top of the hydraulic rod 22. The support mechanism includes a vertical rod 31 and a U-shaped plate 32. The vertical rod 31 slidably penetrates through the top of the support frame 11, and the first motor 12 can drive the vertical rod 31 to rotate relative to the support frame 11 through a transmission component. The top of the vertical rod 31 is rotatably connected to the connecting rod 21. The U-shaped plate 32 is arranged below the vertical rod 31. A tire 321 is rotatably arranged in the U-shaped plate 32. A second motor 322 is fixedly arranged on the outer side wall of the U-shaped plate 32, and the second motor 322 is used to drive the tire 321 to rotate. The test mold 40 is fixedly arranged on the top of the base 10. A test piece 100 is arranged on the top of the test mold 40, and the center of the test mold 40 and the axis of the vertical rod 31 are on the same straight line. The clamping mechanism is arranged above the base 10 and can fix the test piece 100 on the top of the test mold 40.

[0038] In this embodiment, a temperature control box 60 is further included. The temperature control box 60 is fixedly arranged on the top of the base 10, and an opening is arranged on the front wall of the temperature control box 60. A sealing door 61 is hinged at the opening. The vertical rod 31 slidably penetrates through the top of the temperature control box 60 and can rotate relative to the temperature control box 60. The U-shaped plate 32, the test mold 40 and the clamping mechanism are located inside the temperature control box 60. A second rod sleeve 62 is rotatably penetrated through the top of the temperature control box 60. The second rod sleeve 62 is slidably sleeved on the vertical rod 31 and is key-connected to the vertical rod 31.

[0039] In this embodiment, the clamping mechanism includes guide rods 51 and a pressing plate 52. There are two symmetrically arranged guide rods 51, which are respectively fixedly arranged on the top of the base 10 along the vertical direction. Both ends of the pressing plate 52 are slidably sleeved on the two guide rods 51. A tension spring 511 is sleeved outside the guide rod 51, and the tension spring 511 is respectively connected to the base 10 and the pressing plate 52. The pressing plate 52 has a vertically penetrating channel 521.

[0040] In this embodiment, a rib portion is provided on the side wall of the vertical rod 31 below the connecting rod 21. The top of the support frame 11 is rotatably penetrated by a first rod sleeve 13. The first rod sleeve 13 is slidably sleeved on the vertical rod 31. The transmission assembly includes a toothed ring 72 and a gear 71. The toothed ring 72 is fixedly sleeved on the first rod sleeve 13. The gear 71 is fixedly arranged at the end of the output shaft of the first motor 12 and meshes with the toothed ring 72. The first rod sleeve 13 is key-connected to the vertical rod 31.

[0041] In this embodiment, a pressure sensor 82 is fixedly arranged at the bottom of the vertical rod 31. The top of the U-shaped plate 32 is fixedly connected to the bottom of the pressure sensor 82.

[0042] In this embodiment, a torque sensor 81 is serially arranged on the vertical rod 31.

[0043] In this embodiment, the test mold 40 has an inner cavity with an open top. A steel ball filling layer 41 is arranged in the inner cavity, and the steel ball filling layer 41 fills the inner cavity with a plurality of steel balls.

[0044] In this embodiment, a rubber strip 522 is fixedly arranged on the bottom of the pressing plate 52 outside the channel 521.

[0045] In this embodiment, a rotating shaft 323 is rotatably inserted into the U-shaped plate 32. The tire 321 is fixedly sleeved on the rotating shaft 323. One end of the rotating shaft 323 is in transmission connection with the output end of the second motor 322.

[0046] In this embodiment, the test mold 40 and the base 10 are fixedly connected by fastening bolts 90.

[0047] The specific implementation process is as follows:

[0048] Before the experiment starts, the weight of the test piece 100 is measured, and the friction coefficient is measured with a pendulum friction coefficient tester. Subsequently, the test mold 40 is fixed to the top of the base 10, and the clamping mechanism fixes the test piece 100 to the top of the test mold 40. The lifting mechanism lowers the connecting rod 21, and then lowers the vertical rod 31, the U-shaped plate 32, and the tire 321 until the tire 321 abuts against the test piece 100. The second motor 322 is driven to drive the tire 321 to rotate along its axis to simulate the vehicle driving on the road surface. After a period of time, the test piece 100 is taken out, the residues on the surface of the test piece 100 are removed, weighed again, and the friction coefficient is measured again with the pendulum friction coefficient tester, so as to judge the ability of the test piece 100 to resist the friction of the tire 321;

[0049] Or drive the first motor 12 to drive the vertical rod 31 to rotate, and then drive the tire 321 to rotate along the axis of the vertical rod 31, twist 360° clockwise at a constant speed, stabilize for 5 s, then twist 360° counterclockwise in the reverse direction, stabilize for 5 s, and then twist 2 times according to the above process to simulate the tire 321 twisting in place. After twisting back and forth 3 times, the test piece 100 is taken out, the residues on the surface of the test piece 100 are removed, weighed again, and the friction coefficient is measured again with the pendulum friction coefficient tester, so as to judge the ability of the test piece 100 to resist the friction of the tire 321.

[0050] After the test piece 100 is placed on the top of the test mold 40 and fixed by the clamping mechanism, the temperature control box 60 heats the inside to 60°C to 80°C, and the friction coefficient is measured with a pendulum friction coefficient tester after two hours of heat preservation. After the test is completed, keep warm for another 30 minutes to simulate the vehicle driving on the road surface experiment or the tire 321 twisting in place experiment.

[0051] First, lift the pressing plate 52 to stretch the tension spring 511 to make it have elasticity, fix the test mold 40 at the designated position on the top of the base 10, place the test piece 100 on the top of the test mold 40, and loosen the pressing plate 52. The pressing plate 52 moves downward under the action of the tension spring 511 until the pressing plate 52 presses the test piece 100 tightly.

[0052] When driving the connecting rod 21 to move downward, the vertical rod 31, the U-shaped plate 32, and the tire 321 move downward accordingly. At this time, the vertical rod 31 slides downward relative to the first rod sleeve 13. When the tire 321 abuts against the test piece 100, the first motor 12 is driven to drive the gear 71 to rotate. Since the gear 71 meshes with the toothed ring 72, the toothed ring 72 and the first rod sleeve 13 are driven to rotate, and the first rod sleeve 13 drives the vertical rod 31 to rotate along its axis.

[0053] The above are only embodiments of the present utility model, and common general technical solutions or characteristics in the solution are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A prefabricated asphalt pavement anti-rubbing detection device, characterized in that: include: A base, a support frame is fixedly arranged on the top of the base, and a first motor is fixedly arranged on the support frame; A lifting mechanism, the lifting mechanism comprising a connecting rod and a hydraulic rod, the hydraulic rod is vertically fixedly arranged on the top of the support frame, and the bottom of the connecting rod is fixedly connected to the top of the hydraulic rod; A support mechanism, the support mechanism includes a vertical rod and a U-shaped plate, the vertical rod is slidably arranged on the top of the support frame, and the first motor can drive the vertical rod to rotate relative to the support frame through a transmission assembly, the top of the vertical rod is rotatably connected to the connecting rod, the U-shaped plate is arranged below the vertical rod, a tire is rotatably arranged inside the U-shaped plate, and a second motor is fixedly arranged on the outer side wall of the U-shaped plate, and the second motor is used to drive the tire to rotate; A test mold, wherein the test mold is fixedly arranged on the top of the base, a test piece is arranged on the top of the test mold, and the center of the test mold is in the same straight line with the axis of the vertical rod; The clamping mechanism is arranged above the base and can fix the test piece on the top of the test mold.

2. The prefabricated asphalt pavement anti-rubbing detection device according to claim 1, characterized in that: It also includes a temperature control box, which is fixedly arranged on the top of the base, and the front wall of the temperature control box is provided with an opening, and a sealed door is hinged at the opening, the vertical rod is slidably arranged on the top of the temperature control box, and can be rotated relative to the temperature control box, and the U-shaped plate, the test mold and the clamping mechanism are located in the temperature control box.

3. The prefabricated asphalt pavement anti-rubbing detection device according to claim 2, characterized in that: The clamping mechanism includes a guide rod and a pressure plate. Two guide rods are symmetrically arranged and fixedly arranged on the top of the base along the vertical direction. The two ends of the pressure plate are slidably sleeved on the two guide rods. Tension springs are arranged on the outer sleeves of the guide rods. The tension springs are respectively connected to the base and the pressure plate. The pressure plate has a channel running through from top to bottom.

4. The prefabricated asphalt pavement anti-rubbing detection device according to claim 3, characterized in that: The side wall of the vertical rod is provided with an edge below the connecting rod, and a first rod sleeve is rotatably inserted through the top of the support frame, and the first rod sleeve is slidably sleeved on the vertical rod. The transmission assembly includes a gear ring and a gear, the gear ring is fixedly sleeved on the first rod sleeve, and the gear is fixedly set on the end of the output shaft of the first motor and meshes with the gear ring.

5. The prefabricated asphalt pavement anti-rubbing detection device according to any one of claims 1 to 4, characterized in that: A pressure sensor is fixedly arranged at the bottom of the vertical rod, and the top of the U-shaped plate is fixedly connected to the bottom of the pressure sensor.

6. The prefabricated asphalt pavement anti-rubbing detection device according to claim 5, characterized in that: A torque sensor is arranged in series on the vertical rod.

7. The prefabricated asphalt pavement anti-rubbing detection device according to claim 3 or 4, characterized in that: The test mold has an inner cavity with an open top, and a steel ball filling layer is arranged in the inner cavity.

8. The prefabricated asphalt pavement anti-rubbing detection device according to claim 7, characterized in that: A rubber strip is fixedly arranged at the bottom of the pressing plate on the outer periphery of the channel.

9. The prefabricated asphalt pavement anti-rubbing detection device according to any one of claims 1 to 4, characterized in that: A rotating shaft is rotatably inserted in the U-shaped plate, the tire is fixedly sleeved on the rotating shaft, and one end of the rotating shaft is drivingly connected to the output end of the second motor.

10. The prefabricated asphalt pavement anti-rubbing detection device according to any one of claims 1 to 4, characterized in that: The test mold is fixedly connected to the base by fastening bolts.

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