Device and method for detecting high-temperature resistance of asphalt on asphalt pavement

Abstract

The invention relates to the technical field of asphalt pavement detection, and discloses an asphalt pavement asphalt high temperature resistance detection device which comprises a base, a detection box is connected to the upper end of the base, a box door is hinged to the front end of the detection box, a transparent window is embedded in the box door, guide rods are connected to the front and back of an inner cavity of the detection box, and the guide rods are slidably sleeved with sliding sleeves. A translation seat is connected between the two sliding sleeves, two wheel carriers are slidably inserted into the translation seat, a wheel shaft is rotatably connected between the lower parts of the inner walls of the two wheel carriers, the outer wall of the wheel shaft is connected with a rolling wheel, the inner wall of the detection box is connected with a heating pipe, and the outer wall of the detection box is connected with a PLC. The device is reasonable in structural design, the test block is prevented from shifting and shaking during performance detection, the stability is high, the rolling wheel can simulate running on an asphalt pavement in a high-temperature environment, the applicability is high, and the high-temperature resistance of asphalt can be conveniently detected.

Description

Technical Field

[0001] The present invention relates to the technical field of asphalt pavement detection, and in particular to a device and a method for detecting high temperature resistance of asphalt in an asphalt pavement. Background Art

[0002] Asphalt pavement refers to various types of pavement paved with road asphalt materials mixed into mineral materials. Asphalt binder improves the ability of paving aggregate to resist damage to the road surface caused by traffic and natural factors, making the road surface smooth, dust-free, impermeable and durable. Asphalt pavement is the most widely used high-grade pavement in road construction. The asphalt structural layer of asphalt pavement itself belongs to the category of flexible pavement, but its base layer can also use rigid cement concrete or semi-rigid hydraulic materials in addition to flexible materials.

[0003] Before paving asphalt on the road, its high temperature resistance needs to be tested. Existing tests cannot detect the high temperature resistance of asphalt under different weights. To this end, those skilled in the art have conducted research and improvements, such as a device and method for testing the high temperature resistance of asphalt on an asphalt pavement with application number CN201910150640.3. This technical solution uses a placement frame to place multiple weights, which can simulate different sizes of force on asphalt. Although it can achieve a certain pressure regulation effect, it is inconvenient to load and unload the weights in a high temperature environment, and opening the box door will cause a large amount of heat to dissipate, which is not conducive to performance testing. To this end, we proposed a device for testing the high temperature resistance of asphalt on asphalt pavements. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for detecting the high temperature resistance of asphalt on an asphalt pavement, so as to overcome the technical problems existing in the prior art.

[0005] In order to achieve the above technical objectives and the above technical effects, the present invention provides the following technical solutions: The high temperature resistance performance testing device of asphalt pavement comprises a base, the upper end of the base is connected with a testing box, the front end of the testing box is hinged with a box door, a transparent window is embedded in the box door, a lifting seat is arranged in the testing box which can be lifted and lowered, a lifting assembly for driving the lifting seat to lift and lower is arranged on the testing box, round through holes are opened at the four corners of the bottom of the lifting seat, limit rods are slidably inserted in the round through holes, the lower ends of the four limit rods are commonly connected with a pressure plate, a pressure sensor is connected at the bottom of the lifting seat, guide rods are connected to the front and back of the inner cavity of the testing box, a sliding sleeve is provided on the external sliding sleeve of the guide rod, a translation seat is connected between the two sliding sleeves, a translation assembly for driving the translation seat to translate is arranged on the testing box, two wheel frames are slidably inserted in the translation seat, a wheel axle is rotatably connected between the lower parts of the inner walls of the two wheel frames, a rolling wheel is connected to the outer wall of the wheel axle, a heating pipe is connected to the inner wall of the testing box, and a PLC controller is connected to the outer wall of the testing box.

[0006] Preferably, in the asphalt pavement asphalt high temperature resistance performance testing device, the lifting assembly includes a driving motor arranged at the top center of the testing box, the top output end of the driving motor is connected to a vertical screw, the outer wall of the vertical screw is screwed with a nut seat, the outer wall of the nut seat is connected to four L-shaped arms, the lower ends of the four L-shaped arms are commonly connected to a lifting seat, and the upper end of the testing box is provided with a guide hole for the vertical part of the L-shaped arm to pass through.

[0007] Preferably, in the asphalt pavement asphalt high temperature resistance performance testing device, the translation assembly includes a conveying motor arranged on the outer wall of the detection box, a threaded hole is opened in the middle of the translation seat, a transverse screw rod is threaded in the threaded hole, the transverse screw rod is rotatably connected to the detection box through a bearing, the right end of the transverse screw rod is connected to the conveying motor, a fixed shaft is connected between the upper parts of the inner walls of the two wheel frames, a plurality of guide wheels are rotatably connected to the outer wall of the fixed shaft, a compression spring is connected between the fixed shaft and the translation seat, and the guide wheel abuts against the lower surface of the pressure plate.

[0008] Preferably, in the asphalt pavement high temperature resistance testing device, a slide is provided on the top of the base, a slide bar is slidably connected in the slide, a receiving seat is connected to the top of the slide bar, a handle is connected to the front end of the receiving seat, a metal shell is connected to the rear side wall of the receiving seat, and a permanent magnet block is embedded on the rear side of the inner wall of the testing box.

[0009] Preferably, in the asphalt high temperature resistance performance testing device for asphalt pavement, a receiving groove is provided on the top of the receiving seat, and double-headed screws are rotatably connected to the left and right sides of the inner cavity of the receiving groove, and moving blocks are symmetrically screwed on the outer wall of the double-headed screw, and the outer wall of the moving block is hinged with an oblique support rod, and the ends of the front and rear two oblique support rods are hinged with a clamping seat together, the rear end of the double-headed screw is connected to bevel gear 1, and the rear side wall of the receiving seat is connected to a bearing seat, and a transmission shaft is rotatably connected in the bearing seat, and the end of the transmission shaft is connected to bevel gear 2, and bevel gear 2 is meshingly connected to bevel gear 1, and the front end of the double-headed screw on the right side is connected to a handwheel.

[0010] Preferably, in the asphalt pavement high temperature resistance performance testing device, a T-shaped slide groove is provided at the bottom of the inner cavity of the accommodating groove, a T-shaped slider is connected to the bottom of the clamping seat, and the T-shaped slider is slidably connected to the T-shaped slide groove.

[0011] The detection method of the asphalt high temperature resistance performance detection device of asphalt pavement comprises the following steps: S1. Asphalt pavement sampling: cutting a road test block with asphalt on the asphalt pavement and placing the test block in a containing tank; S2, the test block is fixed and clamped. The hand wheel is turned to make the two double-headed screws rotate synchronously. After the oblique support rod is deflected, the two clamping seats move closer to each other, thereby fixing and clamping the test block; S3, space heating and temperature raising, the slide bar extends along the slideway, the test box is closed by the box door, the space is heated by the heating pipe, and the high temperature environment is quickly reached; S4, simulate the driving state. After the vertical screw rotates, the L-shaped arm drives the lifting seat to descend, and the rolling wheel can fit the test block for pressure adjustment. After the horizontal screw rotates, the translation seat moves horizontally, and the rolling wheel simulates wheel driving; S5. Performance test record: remove the receiving seat and measure and record the deformation of the test block to understand its high temperature resistance performance.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention has a reasonable structural design and is easy to operate. The test block is placed in the receiving groove of the receiving seat, and the two double-headed screws can rotate synchronously. After the oblique support rod is deflected, the two clamping seats move closer to each other, which can fix and clamp the test block, avoiding the test block from deviating and shaking during performance testing, and has high stability. 2. This device uses a box door to close the opening of the test box, and uses a heating tube to heat up the interior of the space, which can quickly simulate a high-temperature environment. After the lifting seat descends, the pressure plate fits the guide wheel, and the pressure sensor is used to monitor the pressure. After the lateral screw rotates, the translation seat moves horizontally, and the rolling wheel can simulate driving on an asphalt road in a high-temperature environment, which has high applicability; 3. The rolling wheel in this device runs against the test block. After a period of high-temperature testing, the receiving seat is pulled out from the base, and the test block can be removed without contact. This is safe and reliable, and the deformation of the test block is measured and recorded, which is convenient for testing the high-temperature resistance of asphalt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The overall structure of the present invention is shown in FIG1; Figure 2 The second schematic diagram of the overall structure of the present invention; Figure 3 It is a side view structural schematic diagram of the translation seat in the present invention; Figure 4 It is a schematic diagram of the top view of the receiving seat in the present invention; Figure 5 It is a schematic diagram of the top view of the guide rod in the present invention.

[0015] In the figure: 1. base; 2. test box; 3. box door; 4. transparent window; 5. guide rod; 6. sliding sleeve; 7. translation seat; 8. wheel frame; 9. wheel axle; 10. rolling wheel; 11. heating tube; 12. PLC controller; 1. Pressure sensor; 21. Drive motor; 22. Vertical screw; 23. Nut seat; 24. L-shaped arm; 25. Lifting seat; 26. Guide hole; 27. Round through hole; 28. Limit rod; 29. ​​Press plate; 31. slideway; 32. slide bar; 33. receiving seat; 34. handle; 35. metal shell; 36. permanent magnet block; 71. threaded hole; 72. transverse screw rod; 73. conveying motor; 81. fixed shaft; 82. guide wheel; 83. compression spring; 330, hand wheel; 331, receiving groove; 332, double-headed screw; 333, moving block; 334, oblique support rod; 335, clamping seat; 336, bevel gear 1; 337, bearing seat; 338, transmission shaft; 339, bevel gear 2; 351, T-shaped slide; 352, T-shaped slider. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] See also Figure 1-5 As shown, this embodiment is a device for testing the high temperature resistance of asphalt on an asphalt pavement, comprising a base 1, a test box 2 is connected to the upper end of the base 1, a box door 3 is hinged at the front end of the test box 2, a transparent window 4 is embedded in the box door 3, a lifting seat 25 is arranged in the test box 2 so as to be liftable, a lifting assembly for driving the lifting seat 25 to be lifted and lowered is arranged on the test box 2, a guide rod 5 is connected to the front and rear of the inner cavity of the test box 2, a sliding sleeve 6 is arranged on the outer sliding sleeve of the guide rod 5, a translation seat 7 is connected between the two sliding sleeves 6, a translation assembly for driving the translation seat 7 to translate is arranged on the test box 2, two wheel frames 8 are slidably inserted in the translation seat 7, a wheel axle 9 is rotatably connected between the lower parts of the inner walls of the two wheel frames 8, a rolling wheel 10 is connected to the outer wall of the wheel axle 9, a heating pipe 11 is connected to the inner wall of the test box 2, and a PLC controller 12 is connected to the outer wall of the test box 2.

[0018] The detection method of the asphalt high temperature resistance performance detection device of asphalt pavement comprises the following steps: S1, sampling the asphalt pavement, cutting a road test block with asphalt on the asphalt pavement, and placing the test block in the containing groove 331; S2, the test block is fixedly clamped, the hand wheel 330 is turned to make the two double-headed screws 332 rotate synchronously, and the two clamping seats 335 move closer after the oblique support rod 334 is deflected, so as to fix and clamp the test block; S3, the space is heated and the sliding bar 32 is extended along the slideway 31, the detection box 2 is closed by the box door 3, and the interior of the space is heated by the heating tube 11 to quickly reach a high temperature environment; S4, simulate the driving state, after the vertical screw 22 rotates, the L-shaped arm 24 drives the lifting seat 25 to descend, the rolling wheel 10 can fit the test block for pressure adjustment, after the transverse screw 72 rotates, the translation seat 7 moves horizontally, and the rolling wheel 10 simulates wheel driving; S5. Performance test record: remove the receiving seat 33 to measure and record the deformation of the test block, so as to understand its high temperature resistance performance.

[0019] The lifting assembly includes a driving motor 21 fixed at the top center of the detection box 2, the top output end of the driving motor 21 is connected to a vertical screw rod 22, the outer wall of the vertical screw rod 22 is screwed with a nut seat 23, the outer wall of the nut seat 23 is connected to four L-shaped arms 24, the lower ends of the four L-shaped arms 24 are commonly connected to a lifting seat 25, and the upper end of the detection box 2 is provided with a guide hole 26 for the vertical part of the L-shaped arm 24 to pass through.

[0020] The four corners of the bottom of the lifting seat 25 are provided with round through holes 27, and limit rods 28 are slidably inserted in the round through holes 27. The lower ends of the four limit rods 28 are commonly connected to a pressure plate 29. The bottom of the lifting seat 25 is connected to a pressure sensor 20 for monitoring the pressure.

[0021] The translation assembly includes a conveying motor 73 fixed to the outer wall of the detection box 2, a threaded hole 71 is opened in the middle of the translation seat 7, a transverse screw rod 72 is screwed into the threaded hole 71, the transverse screw rod 72 is rotatably connected to the detection box 2 through a bearing, and the right end of the transverse screw rod 72 is connected to the conveying motor 73, a fixed shaft 81 is connected between the upper parts of the inner walls of the two wheel frames 8, and a plurality of guide wheels 82 are rotatably connected to the outer wall of the fixed shaft 81, a compression spring 83 is connected between the fixed shaft 81 and the translation seat 7, and the guide wheel 82 abuts against the lower surface of the pressure plate 29.

[0022] A slideway 31 is provided at the top of the base 1, a slide bar 32 is slidably connected inside the slideway 31, a receiving seat 33 is connected to the top of the slide bar 32, a handle 34 is connected to the front end of the receiving seat 33, a metal shell 35 is connected to the rear side wall of the receiving seat 33, and a permanent magnet block 36 is embedded on the rear side of the inner wall of the detection box 2.

[0023] A accommodating groove 331 is provided at the top of the receiving seat 33, and double-headed screws 332 are rotatably connected to the left and right sides of the inner cavity of the accommodating groove 331, and a moving block 333 is symmetrically screwed on the outer wall of the double-headed screw 332 in the front and rear directions, and an oblique support rod 334 is hinged on the outer wall of the moving block 333, and the ends of the front and rear two oblique support rods 334 are hinged together with a clamping seat 335, and the rear end of the double-headed screw 332 is connected to a bevel gear 1 336, and the rear side wall of the receiving seat 33 is connected to a bearing seat 337, and a transmission shaft 338 is rotatably connected in the bearing seat 337, and the end of the transmission shaft 338 is connected to a bevel gear 2 339, which is meshed with the bevel gear 1 336, and the front end of the right double-headed screw 332 is connected to a hand wheel 330.

[0024] A T-shaped slide groove 351 is provided at the bottom of the inner cavity of the accommodating groove 331 , and a T-shaped slider 352 is connected to the bottom of the clamping seat 335 . The T-shaped slider 352 is slidably connected to the T-shaped slide groove 351 to ensure the horizontal movement of the clamping seat 335 .

[0025] The specific implementation of this embodiment is as follows: When the device is used to test the high temperature resistance of asphalt on an asphalt pavement, a road test block with asphalt is cut out on the asphalt pavement, and the test block is moved into the receiving groove 331 of the receiving seat 33. The double-headed screw 332 on one side is driven to rotate by the hand wheel 330, and the bevel gear 1 336 is used to mesh with the transmission bevel gear 2 339. After the transmission shaft 338 rotates, the two double-headed screws 332 rotate synchronously, and the front and rear two groups of moving blocks 333 can move closer. The T-shaped slide groove 351 is used to match the T-shaped slider 352 for limiting guidance, so that after the oblique support rod 334 is deflected, the two clamping seats 335 move closer. The clamping seat 335 can fix and clamp the test block to prevent the test block from offsetting and shaking during performance testing. The slide bar 32 is extended along the slideway 31, and the receiving seat 33 is placed at the bottom. At the top of the seat 1, the opening of the test box 2 is closed by the box door 3, and the heating tube 11 is started to heat up the inside of the space to quickly reach a high temperature environment. The vertical screw 22 is driven to rotate by the driving motor 21, and the nut seat 23 drives the L-shaped arm 24 to descend. After the lifting seat 25 descends, the pressure plate 29 fits the guide wheel 82, and the pressure sensor 20 is used to monitor the pressure, simulating vehicles of different weights to press the test block, and the horizontal screw 72 is driven to rotate by the conveying motor 73. The sliding sleeve 6 cooperates with the guide rod 5 for limiting guidance, and the translation seat 7 can move laterally, so that the rolling wheel 10 fits the test block for travel. After a period of high temperature test, the receiving seat 33 is pulled out of the base 1, and the deformation of the test block is measured and recorded to understand its high temperature resistance.

[0026] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0027] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A device for testing the high temperature resistance of asphalt on an asphalt pavement, comprising a base (1), characterized in that: The upper end of the base (1) is connected to a test box (2), a box door (3) is hinged at the front end of the test box (2), a transparent window (4) is embedded in the box door (3), a lifting seat (25) is arranged in the test box (2) and can be lifted and lowered, a lifting assembly for driving the lifting seat (25) to lift and lower is arranged on the test box (2), round through holes (27) are opened at four corners of the bottom of the lifting seat (25), limiting rods (28) are slidably inserted in the round through holes (27), the lower ends of the four limiting rods (28) are commonly connected to a pressure plate (29), and the bottom of the lifting seat (25) is connected to a pressure sensor (20), The inner cavity of the detection box (2) is connected to a guide rod (5) at the front and rear, a sliding sleeve (6) is provided on the outer sliding sleeve of the guide rod (5), a translation seat (7) is connected between the two sliding sleeves (6), a translation assembly for driving the translation seat (7) to translate is provided on the detection box (2), two wheel frames (8) are slidably inserted in the translation seat (7), a wheel axle (9) is rotatably connected between the lower parts of the inner walls of the two wheel frames (8), a rolling wheel (10) is connected to the outer wall of the wheel axle (9), a heating pipe (11) is connected to the inner wall of the detection box (2), and a PLC controller (12) is connected to the outer wall of the detection box (2).

2. The asphalt high temperature resistance performance testing device for asphalt pavement according to claim 1 is characterized in that: The lifting assembly comprises a driving motor (21) arranged at the top center of the detection box (2); the top output end of the driving motor (21) is connected to a vertical screw rod (22); the outer wall of the vertical screw rod (22) is screwed with a nut seat (23); the outer wall of the nut seat (23) is connected to four L-shaped arms (24); the lower ends of the four L-shaped arms (24) are commonly connected to a lifting seat (25); and the upper end of the detection box (2) is provided with a guide hole (26) for the vertical portion of the L-shaped arm (24) to pass through.

3. The device for testing the high temperature resistance of asphalt on asphalt pavement according to claim 2 is characterized in that: The translation assembly comprises a conveying motor (73) arranged on the outer wall of the detection box (2); a threaded hole (71) is opened in the middle of the translation seat (7); a transverse screw rod (72) is screwed into the threaded hole (71); the transverse screw rod (72) is rotatably connected to the detection box (2) via a bearing; the right end of the transverse screw rod (72) is connected to the conveying motor (73); a fixed shaft (81) is connected between the upper parts of the inner walls of the two wheel frames (8); a plurality of guide wheels (82) are rotatably connected to the outer wall of the fixed shaft (81); a compression spring (83) is connected between the fixed shaft (81) and the translation seat (7); and the guide wheel (82) abuts against the lower surface of the pressure plate (29).

4. The device for testing the high temperature resistance of asphalt on asphalt pavement according to claim 1 is characterized in that: A slideway (31) is provided at the top of the base (1), a slide bar (32) is slidably connected inside the slideway (31), a receiving seat (33) is connected to the top of the slide bar (32), a handle (34) is connected to the front end of the receiving seat (33), a metal shell (35) is connected to the rear side wall of the receiving seat (33), and a permanent magnet block (36) is embedded on the rear side of the inner wall of the detection box (2).

5. The device for testing the high temperature resistance of asphalt on asphalt pavement according to claim 4 is characterized in that: A receiving groove (331) is provided at the top of the receiving seat (33), and double-headed screws (332) are rotatably connected to the left and right sides of the inner cavity of the receiving groove (331), and a moving block (333) is symmetrically screwed to the outer wall of the double-headed screw (332) in front and back directions, and an oblique support rod (334) is hinged to the outer wall of the moving block (333), and the ends of the two oblique support rods (334) are hinged to a clamping seat (335) together, and the rear end of the double-headed screw (332) is connected to a bevel gear 1 (336), and the rear side wall of the receiving seat (33) is connected to a bearing seat (337), and a transmission shaft (338) is rotatably connected to the bearing seat (337), and the end of the transmission shaft (338) is connected to a bevel gear 2 (339), and the bevel gear 2 (339) is meshedly connected to the bevel gear 1 (336), and the front end of the double-headed screw (332) on the right side is connected to a hand wheel (330).

6. The device for testing the high temperature resistance of asphalt on asphalt pavement according to claim 5 is characterized in that: A T-shaped slide groove (351) is provided at the bottom of the inner cavity of the accommodating groove (331), a T-shaped sliding block (352) is connected to the bottom of the clamping seat (335), and the T-shaped sliding block (352) is slidably connected to the T-shaped slide groove (351).

7. A method for testing the high temperature resistance of asphalt on an asphalt pavement, using the device for testing the high temperature resistance of asphalt on an asphalt pavement as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1, sampling the asphalt pavement, cutting a road test block with asphalt on the asphalt pavement, and placing the test block in a containing groove (331); S2, the test block is fixedly clamped, the hand wheel (330) is turned to make the two double-headed screws (332) rotate synchronously, and the two clamping seats (335) move closer after the inclined support rod (334) is deflected, so that the test block is fixedly clamped; S3, heating the space, the sliding bar (32) extends along the slideway (31), the detection box (2) is closed by the box door (3), and the interior of the space is heated by the heating tube (11) to quickly reach a high temperature environment; S4, simulating a driving state, after the vertical screw (22) rotates, the L-shaped arm (24) drives the lifting seat (25) to descend, and the rolling wheel (10) can fit the test block for pressure adjustment, and after the transverse screw (72) rotates, the translation seat (7) moves horizontally, and the rolling wheel (10) simulates wheel driving; S5. Performance test record: the receiving seat (33) is removed to measure and record the deformation of the test block, so as to understand its high temperature resistance performance.

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