An apparatus for detecting the interfacial bonding strength of asphalt pavement

Abstract

The present invention relates to the technical field of detection devices, and discloses an interlayer bonding strength detection device for asphalt pavement, which includes a bearing base, a detection sleeve and a detection mechanism. The bearing base is provided with a sample loading mechanism for moving the sample to the detection position, and a clamping mechanism for clamping the sample in cooperation with the sample loading mechanism. The sample loading mechanism moves with the clamping mechanism. The bearing base is provided with a cleaning mechanism for cleaning the detection sleeve as it moves with the clamping mechanism. The bearing base is provided with a heat preservation mechanism for heat preservation of the sample. The present invention self-centeringly clamps the sample through the clamping mechanism, and the sample loading mechanism drives the sample to move upward to the detection point and stay, avoiding the slippage of the sample during the test, improving the accuracy of the detection result, improving the efficiency of sample loading, and the heat preservation mechanism avoids the temperature fluctuation of the sample, improving the accuracy of the simulation result of the pavement use condition under different ambient temperatures.

Description

Technical Field

[0001] The present invention relates to the technical field of detection devices, and in particular to a detection device for the interfacial bonding strength of asphalt pavements. Background Art

[0002] In order to accurately evaluate the bonding performance between different asphalt layers, provide key parameters for pavement structure design, ensure the rationality and reliability of the design, and at the same time inspect the construction technology and material quality, determine whether the expected interfacial bonding effect is achieved during the construction process through detection, so as to timely discover problems and improve the construction method, and study the influence of different factors on the interfacial bonding strength, such as temperature, humidity, material composition, etc., and provide a basis for optimizing pavement materials and construction conditions, it is usually necessary to use a bonding strength detection device to detect the bonding strength of different asphalt pavement layers.

[0003] The existing laboratory detection devices for the interfacial bonding strength of asphalt pavements usually have a pull-out head buried or bonded between the asphalt layers. After the bonding is firm, a vertical upward pulling force is applied to the pull-out head by a pulling device until the pull-out head is separated from the asphalt layer, so as to determine the interfacial bonding strength. The pull-out test of this structure is relatively simple to operate and can better simulate the stress situation of the pavement layer during actual use. However, in order to prevent the splashing of the sample at the moment of pulling off, the existing detection devices for the interfacial bonding strength of asphalt pavements usually set up a protective cover to improve the protection of the operators. However, the setting of the protective cover increases the difficulty of clamping the sample, resulting in time-consuming and laborious sample clamping and reducing the detection efficiency. At the same time, since the interfacial bonding strength of asphalt pavements is greatly affected by temperature, the existing detection devices usually use equipment such as a constant temperature box to keep the sample at a constant temperature before detection. However, after taking the sample out of the constant temperature box, the sample temperature will fluctuate, resulting in inaccurate simulation of the use conditions of the pavement at different ambient temperatures and affecting the result determination. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a detection device for the interfacial bonding strength of asphalt pavements.

[0005] To solve the above technical problems, the technical solution provided by the present invention is: a device for detecting the interfacial bonding strength of an asphalt pavement, including a bearing base, a detection sleeve is provided on the bearing base, and a detection mechanism is provided inside the detection sleeve on the bearing base. The detection mechanism includes a tensiometer, a sensor, an upper transmission rod, a lower transmission rod and a bonding member. The two ends of the sensor are respectively connected to the upper transmission rod and the lower transmission rod. The upper transmission rod is connected to a tensile machine through a thread, and the lower transmission rod is connected to the bonding member through a thread. An upper sample mechanism for moving the sample to the detection position is provided on the bearing base, and a clamping mechanism for clamping the sample in cooperation with the upper sample mechanism is provided on the bearing base. The upper sample mechanism moves with the clamping mechanism. The clamping mechanism includes a support sleeve provided on the bearing base. A clamping support plate is rotatably provided on the support sleeve. A clamping chute is provided on the clamping support plate. A clamping motor for driving the clamping support plate to rotate is provided inside the support sleeve. A bearing slider is slidably provided on the bearing base. A clamping block is provided at the upper end of the bearing slider. A clamping slide column slidably matched with the clamping chute is provided at the lower end of the bearing slider. A cleaning mechanism for cleaning the detection sleeve as the clamping block moves is provided on the bearing base. A heat preservation mechanism for heat-preserving the sample is provided on the bearing base.

[0006] As an improvement, the upper sample mechanism includes an upper sample support plate slidably provided on the bearing base. A driving column connected to the clamping support plate is rotatably provided on the bearing base. A driving gear is provided on the driving column. A mating gear meshing with the driving gear is rotatably provided on the bearing base. A mating column is provided on the mating gear. A mating chute is provided on the mating column. The mating chute includes an inclined chute and a transverse chute that are interconnected. A moving sleeve is provided at the lower end of the upper sample support plate. A moving spring is provided inside the moving sleeve. A moving slide rod connected to the moving spring is slidably provided inside the moving sleeve. The moving slide rod is slidably connected to the mating chute.

[0007] As an improvement, a cleaning frame is slidably provided inside the detection sleeve. A cleaning block is provided on the cleaning frame. A linkage arm is rotatably provided on the detection sleeve. A linkage grooved wheel is provided at one end of the linkage arm. A connecting rope passing through the linkage grooved wheel and connected to the detection sleeve is provided on the cleaning frame. A linkage slide column is provided at the other end of the linkage arm. A linkage frame is provided on the clamping block. A linkage slider slidably matched with the linkage slide column is provided on the linkage frame.

[0008] As an improvement, connecting sleeves are provided on the cleaning frame. The connecting sleeves are symmetrically arranged on both sides of the connecting rope. A connecting spring is provided inside the connecting sleeve. A connecting slide rod connected to the connecting spring is slidably provided inside the connecting sleeve. One end of the connecting slide rod extending out of the connecting sleeve is connected to the bearing base.

[0009] As an improvement, a heat preservation jacket is provided at the lower end of the upper sample support plate. A liquid inlet jacket is communicated with the lower end of the heat preservation jacket. A slow flow cavity is provided on the clamping block. Multiple groups of the slow flow cavities are interconnected. The detection sleeve is a hollow structure. The detection sleeve is communicated with one group of the slow flow cavities. The heat preservation jacket is communicated with another group of the slow flow cavities.

[0010] As an improvement, a liquid outlet pipe is communicatively provided on the detection sleeve, a heat preservation port is provided at one end of the heat preservation jacket, a liquid delivery pipe is communicatively provided at one end of the liquid inlet jacket, a liquid replenishment port and a liquid return port are provided on the slow flow chamber, and the heat preservation mechanism includes a communicating pipe, a liquid replenishment pipe and a liquid feeding pipe. A communicating pipe is communicatively provided between the liquid replenishment port on a group of slow flow chambers and the liquid return port on an adjacent group of slow flow chambers, a liquid replenishment pipe is communicatively provided between the heat preservation port and the liquid replenishment port on a group of slow flow chambers, and a liquid feeding pipe is communicatively provided between the liquid return port on the other group of slow flow chambers and the liquid inlet pipe.

[0011] As an improvement, a slow flow mechanism for slowing down the flow of liquid is provided in the slow flow chamber. The slow flow mechanism includes a partition plate, communication holes are provided on the partition plate, slow flow plates are provided at both ends of the partition plate, and multiple groups of slow flow plates are arranged in a staggered manner.

[0012] The beneficial effects of the present invention compared with the prior art are as follows: During the process of the clamping mechanism performing self-centering clamping on the specimen, the specimen loading mechanism drives the specimen to move upward to the detection position and hold it. Then, the clamping mechanism completes self-centering clamping on the specimen, so that the position of the specimen at the detection position is fixed, avoiding the specimen from slipping during the test, improving the accuracy of the detection result. The clamping mechanism and the specimen loading mechanism cooperate to improve the efficiency of specimen loading. The position where different specimens are placed each time remains unchanged, improving the representativeness of the detection result. The cleaning mechanism can clean the detection sleeve after the detection is completed, avoiding the influence of impurities adhered to the detection sleeve on the detection. The heat preservation mechanism keeps the specimen warm, avoiding fluctuations in the temperature of the specimen and improving the accuracy of the simulation results of the pavement usage conditions under different ambient temperatures. Specifically:

[0013] 1. The clamping mechanism drives the clamping support plate to rotate through the clamping motor. The clamping support plate drives the bearing slider to slide along the bearing chute. When the bearing slider moves towards the center of the clamping support plate, multiple groups of equally spaced and circumferentially arranged clamping blocks move synchronously to perform self-centering clamping on the specimen. While having high clamping efficiency, it makes the position where the specimen is placed each time fixed, improving convenience and the accuracy of detection at the same time;

[0014] 2. During the process of the specimen loading mechanism driving the driving column to rotate when the clamping support plate rotates to clamp and fix the specimen, the driving column drives the cooperating column to rotate through the mutually meshing driving gear and the cooperating gear, and the cooperating chute rotates synchronously. The moving slide rod sequentially passes through the inclined chute and enters the horizontal chute, and the moving sleeve drives the specimen loading support plate to move upward. After the moving slide rod enters the horizontal chute, the height of the specimen loading support plate remains unchanged. At this time, the specimen loading support plate is at the test position, facilitating the testing of the specimen, and can realize the operation of specimen loading while clamping, simplifying the operation steps of specimen loading and clamping, and improving the testing efficiency and the accuracy of the testing result;

[0015] 3. When the clamping block clamps the specimen, the linkage frame drives the linkage slider to move synchronously. The linkage sliding column drives the linkage arm and the linkage grooved pulley to rotate synchronously. The linkage grooved pulley pulls the connecting rope, and the connecting rope pulls the cleaning frame and the cleaning block to move upward synchronously. The cleaning block cleans the inner wall of the detection sleeve, preventing debris from adhering to the inner wall of the detection sleeve and improving the accuracy of the detection results. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0017] Figure 2 is an exploded view of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0018] Figure 3 is a sectional view of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0019] Figure 4 is an exploded view of the clamping mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0020] Figure 5 is a sectional view of the clamping mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0021] Figure 6 is a schematic structural diagram of the sample loading mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0022] Figure 7 is an exploded view of the sample loading mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0023] Figure 8 is a sectional view of the sample loading mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0024] Figure 9 is a schematic structural diagram of the cleaning mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0025] Figure 10 is an exploded view of the cleaning mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0026] Figure 11 is an exploded view of the detection mechanism of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0027] Figure 12 is a schematic structural diagram of the bearing base of a device for detecting the interfacial bonding strength of asphalt pavement layers according to the present invention.

[0028] Figure 13It is a schematic structural diagram of a heat preservation mechanism of a device for detecting the interlayer bonding strength of an asphalt pavement according to the present invention.

[0029] As shown in the figure: 1. Bearing base; 11. Detection sleeve; 111. Liquid outlet pipe; 112. Liquid inlet pipe; 12. Bearing block; 121. Bearing chute; 122. Bearing sliding column; 2. Detection mechanism; 21. Tensile meter; 22. Sensor; 221. Upper transmission rod; 222. Lower transmission rod; 223. Adhesive; 23. Specimen; 3. Clamping mechanism; 31. Clamping support plate; 311. Clamping chute; 32. Bearing slider; 321. Clamping sliding column; 322. Clamping block; 323. Flow buffering mechanism; 3231. Partition plate; 3232. Flow buffering plate; 3233. Communication hole; 3234. Liquid supplement port; 3235. Liquid return port; 3236. Flow buffering cavity; 324. Support sleeve; 3241. Clamping motor; 4. Sampling mechanism; 41. Sampling support plate; 411. Bearing sliding sleeve; 412. Guide block; 413. Guide groove; 414. Heat preservation jacket; 4141. Heat preservation port; 415. Liquid inlet jacket; 4151. Liquid delivery pipe; 416. Moving sleeve; 4161. Moving sliding rod; 4162. Moving spring; 42. Driving column; 421. Driving gear; 43. Matching gear; 431. Matching column; 432. Matching chute; 4321. Oblique chute; 4322. Horizontal chute; 5. Cleaning mechanism; 51. Cleaning frame; 511. Limit card slot; 52. Cleaning block; 521. Limit card block; 53. Connecting sleeve; 531. Connecting sliding rod; 532. Connecting spring; 54. Guide groove wheel; 541. Connecting rope; 55. Linkage frame; 551. Linkage slider; 552. Linkage arm; 553. Linkage groove wheel; 554. Linkage sliding column; 6. Heat preservation mechanism; 61. Connecting pipe; 62. Liquid supplement pipe; 63. Upper liquid pipe. Detailed implementation manners

[0030] The present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Combined with the attached Figure 1 、 attached Figure 2 、 attached Figure 3 and attached Figure 11As shown in the figure, an interlayer bonding strength detection device for asphalt pavement includes a bearing base 1. A detection sleeve 11 is provided on the bearing base 1. The detection sleeve 11 is of a ring structure. A detection mechanism 2 is provided inside the detection sleeve 11 on the bearing base 1. The detection mechanism 2 includes a tensiometer 21, a sensor 22, an upper transmission rod 221, a lower transmission rod 222 and a paste member 223. The two ends of the sensor 22 are respectively connected with the upper transmission rod 221 and the lower transmission rod 222. The upper transmission rod 221 is connected to a tensile machine through a thread, and the lower transmission rod 222 is connected to the paste member 223 through a thread. The paste member 223 is connected to a specimen 23. An upper-sampling mechanism 4 for moving the specimen 23 to a detection position is provided on the bearing base 1. A clamping mechanism 3 for clamping the specimen 23 in cooperation with the upper-sampling mechanism 4 is provided on the bearing base 1. The upper-sampling mechanism 4 moves along with the clamping mechanism 3. A cleaning mechanism 5 for cleaning the detection sleeve 11 along with the movement of the clamping mechanism 3 is provided on the bearing base 1. A heat preservation mechanism 6 for heat-preserving the specimen 23 is provided on the bearing base 1.

[0032] The working principle of the present invention: After the paste member 223 and the specimen 23 are fixedly connected by pasting and placed on the clamping mechanism 3, during the process that the clamping mechanism 3 starts to perform self-centering clamping on the specimen 23, the upper-sampling mechanism 4 drives the specimen 23 to move upward to the detection point and stay. Then, the clamping mechanism 3 completes self-centering clamping on the specimen 23, so that the position of the specimen 23 at the detection point is kept fixed, avoiding the specimen 23 from slipping during the test and improving the accuracy of the detection result. Then, the lower transmission rod 222 is connected to the paste member 223, and the bonding strength of the specimen 23 is detected by the cooperation of the tensiometer 21 and the sensor 22. This is the current existing technology and will not be elaborated here. The clamping mechanism 3 and the upper-sampling mechanism 4 cooperate to improve the sampling efficiency and keep the placement position of different specimens 23 unchanged each time, improving the representativeness of the detection result. Further, the cleaning mechanism 5 moving along with the clamping mechanism 3 can clean the detection sleeve 11 after the detection is completed, avoiding the influence of impurities adhered to the detection sleeve 11 on the detection. At the same time, the heat preservation mechanism 6 can heat-preserve the specimen 23, avoiding the temperature of the specimen 23 from fluctuating and improving the accuracy of the simulation result of the pavement use conditions under different ambient temperatures.

[0033] Combined with the attached Figure 1 、attached Figure 4 、attached Figure 5 and attached Figure 12As shown, a carrier block 12 is provided on the carrier base 1. The carrier block 12 is of a hollow structure. A carrier chute 121 is provided on the carrier block 12. At least four groups of carrier chutes 121 are equidistantly arranged along the circumferential direction of the carrier block 12. The clamping mechanism 3 includes a support sleeve 324 provided on the carrier base 1. The support sleeve 324 is arranged inside the carrier block 12. A clamping support plate 31 is rotatably provided on the support sleeve 324. A clamping chute 311 is provided on the clamping support plate 31. The support chute is arranged corresponding to the carrier chute 121. One end of the support chute is arranged to deviate towards the axis of the clamping support plate 31. A clamping motor 3241 for driving the clamping support plate 31 to rotate is provided inside the support sleeve 324. A carrier slider 32 is slidably arranged in the carrier chute 121. A clamping block 322 is provided at the upper end of the carrier slider 32. The inner side of the clamping block 322 is of an arc structure. A clamping slide post 321 which is slidably matched with the clamping chute 311 is provided at the lower end of the carrier slider 32.

[0034] The working principle of the clamping mechanism 3: When the clamping motor 3241 is started, the clamping motor 3241 drives the clamping support plate 31 to rotate. During the rotation of the clamping support plate 31, the clamping chute 311 rotates synchronously. Since one end of the clamping chute 311 is arranged to deviate towards the axis of the clamping support plate 31, the clamping chute 311 can drive the carrier slider 32 to slide along the carrier chute 121 through the clamping slide post 321. When the carrier slider 32 moves along the carrier chute 121 towards the axis of the clamping support plate 31, the clamping block 322 moves synchronously. Multiple groups of clamping blocks 322 arranged equidistantly in a circle move synchronously to perform self-centering clamping on the specimen 23. Since the inner side of the clamping block 322 is of an arc structure, the contact area between the clamping block 322 and the specimen 23 is increased, and the fixing effect on the specimen 23 is improved. On the contrary, when the carrier slider 32 moves along the carrier chute 121 away from the axis of the clamping support plate 31, multiple groups of clamping blocks 322 arranged equidistantly in a circle move synchronously to loosen the specimen 23.

[0035] Combined with the attached Figure 3 、attached Figure 4 、attached Figure 6 、attached Figure 7 、attached Figure 8 and attached Figure 12As shown in the figure, a bearing slide column 122 is provided on the bearing block 12, and multiple groups of bearing slide columns 122 are provided. The sample loading mechanism 4 includes a sample loading tray 41 slidably arranged on the bearing block 12. A guiding groove 413 cooperating with the clamping block 322 is provided on the sample loading tray 41. A guiding block 412 is provided on the sample loading tray 41. A bearing sliding sleeve 411 slidably cooperating with the bearing slide column 122 is provided on the sample loading tray 41. A driving column 42 connected to the clamping tray 31 is rotatably provided on the bearing block 12. A driving gear 421 is provided on the driving column 42. A mating gear 43 meshing with the driving gear 421 is rotatably provided on the bearing block 12. A mating column 431 is provided on the mating gear 43. A mating chute 432 is provided on the mating column 431. The mating chute 432 includes an inclined chute 4321 and a transverse chute 4322 that are communicated with each other. The transverse chute 4322 is arranged above the inclined chute 4321. A moving sleeve 416 is provided at the lower end of the sample loading tray 41. A moving spring 4162 is provided in the moving sleeve 416. A moving slide rod 4161 connected to the moving spring 4162 is slidably arranged in the moving sleeve 416. The moving slide rod 4161 is slidably connected to the mating chute 432.

[0036] Working principle of the sample loading mechanism 4: During the process that the clamping tray 31 rotates to clamp the sample 23, the driving column 42 connected thereto is driven to rotate. The driving column 42 drives the driving gear 421 to rotate. The driving gear 421 drives the mating column 431 to rotate through the mating gear 43 meshing therewith. The mating column 431 drives the mating chute 432 to rotate synchronously. Due to the arrangement of the moving spring 4162, the moving slide rod 4161 is kept in sliding contact with the mating chute 432. At this time, during the process that the mating column 431 rotates and the moving slide rod 4161 sequentially passes through the inclined chute 4321 and enters the transverse chute 4322, the moving slide rod 4161 drives the sample loading tray 41 to move upward through the moving sleeve 416. After the moving slide rod 4161 enters the transverse chute 4322, the height of the sample loading tray 41 remains unchanged. At this time, the sample loading tray 41 is at the test position, which is convenient for testing the sample 23. On the contrary, during the process that the clamping tray 31 rotates to release the sample 23, during the process that the mating column 431 rotates and the moving slide rod 4161 sequentially passes through the transverse chute 4322 and enters the inclined chute 4321, the moving slide rod 4161 drives the sample loading tray 41 to move downward through the moving sleeve 416 until the mating column 431 stops rotating. At this time, the sample loading tray 41 is at the sample loading position, which is convenient for the operation of loading and unloading the sample 23.

[0037] Combined with the attached Figure 3 、attached Figure 4 、attached Figure 9 and attached Figure 10As shown, a cleaning frame 51 is slidably arranged in the detection sleeve 11. A limiting card slot 511 is arranged on the cleaning frame 51. A cleaning block 52 is arranged on the cleaning frame 51. The cleaning block 52 contacts the inner wall of the detection sleeve 11. A limiting card block 521 that is movably clamped with the limiting card slot 511 is arranged on the cleaning block 52. A guiding groove wheel 54 is rotatably arranged on the detection sleeve 11. A linkage arm 552 is rotatably arranged on the detection sleeve 11. A linkage groove wheel 553 is arranged at one end of the linkage arm 552. A connecting rope 541 that sequentially passes through the guiding groove wheel 54, the linkage groove wheel 553 and is connected to the detection sleeve 11 is arranged on the cleaning frame 51. A linkage sliding column 554 is arranged at the other end of the linkage arm 552. A linkage frame 55 is arranged on the clamping block 322. A linkage sliding block 551 that is slidably matched with the linkage sliding column 554 is arranged on the linkage frame 55;

[0038] A connecting sleeve 53 is arranged on the cleaning frame 51. The connecting sleeves 53 are symmetrically arranged on both sides of the connecting rope 541. A connecting spring 532 is arranged in the connecting sleeve 53. A connecting sliding rod 531 that is connected to the connecting spring 532 is slidably arranged in the connecting sleeve 53. One end of the connecting sliding rod 531 extending out of the connecting sleeve 53 is connected to the bearing base 1.

[0039] Working principle of the cleaning mechanism 5: When the clamping block 322 clamps the sample 23 in the direction approaching the sample 23, the clamping block 322 drives the linkage sliding block 551 to move synchronously through the linkage frame 55. The linkage sliding block 551 drives the linkage arm 552 to rotate through the linkage sliding column 554 that is slidably matched with it. The linkage arm 552 drives the linkage groove wheel 553 to rotate. The linkage groove wheel 553 pulls the connecting rope 541. The connecting rope 541 pulls the cleaning frame 51 to move upward. The cleaning frame 51 drives the cleaning block 52 to move upward synchronously. During this process, the cleaning block 52 cleans the inner wall of the detection sleeve 11 to prevent sundries from adhering to the inner wall of the detection sleeve 11. When the cleaning block 52 is damaged, the cleaning block 52 can be conveniently replaced through the cooperation of the limiting card slot 511 and the limiting card block 521. At the same time, the connecting sleeve 53 moves upward and compresses the connecting spring 532. The connecting spring 532 contracts under force. On the contrary, when the clamping block 322 clamps the sample 23 in the direction away from the sample 23, the connecting spring 532 resets and drives the cleaning frame 51 to move downward through the connecting sleeve 53. The linkage frame 55 drives the linkage sliding block 551 to reset. The linkage groove wheel 553 resets. The connecting rope 541 resets.

[0040] Combined with attached Figure 1 、attached Figure 3 、attached Figure 4 、attached Figure 5 、attached Figure 7 、attached Figure 8 and attached Figure 13As shown, a heat preservation jacket 414 is provided at the lower end of the sample loading pallet 41. A liquid inlet jacket 415 is connected and communicated at the lower end of the heat preservation jacket 414. A slow flow chamber 3236 is provided on the clamping block 322. Multiple groups of the slow flow chambers 3236 are communicated with each other. The detection sleeve 11 is of a hollow structure. The detection sleeve 11 is communicated with one group of the slow flow chambers 3236. The heat preservation jacket 414 is communicated with another group of the slow flow chambers 3236;

[0041] An outlet pipe 111 is connected and communicated on the detection sleeve 11. The outlet pipe 111 is communicated with an external heat preservation liquid providing mechanism. The external heat preservation liquid providing mechanism can recycle the liquid. One end of the heat preservation jacket 414 is provided with a heat preservation port 4141. One end of the liquid inlet jacket 415 is connected and communicated with a liquid delivery pipe 4151. The liquid delivery pipe 4151 is communicated with an external heat preservation liquid providing mechanism. The external heat preservation liquid providing mechanism can pressurize the liquid. The external heat preservation liquid providing mechanism can be composed of a liquid storage chamber with an infusion pump. A heat preservation component is provided on the liquid storage chamber. The heat preservation component includes a heating and a refrigerating component. This is the current prior art and will not be elaborated here. A liquid supplement port 3234 and a liquid return port 3235 are provided on the slow flow chamber 3236. The liquid supplement port 3234 is located below the liquid return port 3235. The heat preservation mechanism 6 includes a communication pipe 61, a liquid supplement pipe 62 and a liquid feeding pipe 63. A communication pipe 61 is connected and communicated between the liquid supplement port 3234 on one group of the slow flow chambers 3236 and the liquid return port 3235 on the adjacent group of the slow flow chambers 3236. A liquid supplement pipe 62 is connected and communicated between the heat preservation port 4141 and the liquid supplement port 3234 on one group of the slow flow chambers 3236. A liquid feeding pipe 63 is connected and communicated between the liquid return port 3235 on the other group of the slow flow chambers 3236 and the inlet pipe 112;

[0042] A slow flow mechanism 323 for slowing down the liquid flow is provided in the slow flow chamber 3236. The slow flow mechanism 323 includes a partition plate 3231. The partition plate 3231 is located between the liquid supplement port 3234 and the liquid return port 3235. Communication holes 3233 are provided on the partition plate 3231. Slow flow plates 3232 are provided at both ends of the partition plate 3231. Multiple groups of the slow flow plates 3232 are arranged in an alternating manner.

[0043] Working principle of the heat preservation mechanism 6: The external heat preservation liquid supply mechanism inputs the heat preservation liquid into the liquid inlet jacket 415 through the liquid delivery pipe 4151. The heat preservation liquid entering the liquid inlet jacket 415 successively passes through the heat preservation jacket 414, the heat preservation port 4141 and the liquid replenishing pipe 62, and then enters the slow flow chamber 3236 on a group of clamping blocks 322 through the liquid replenishing port 3234. After that, the heat preservation liquid successively passes through multiple groups of slow flow plates 3232 and enters the upper part of the partition plate 3231 through the communication hole 3233. After that, after passing through multiple groups of slow flow plates 3232 again, it enters the slow flow chamber 3236 of the adjacent clamping block 322 through the liquid return port 3235, the liquid inlet pipe 112 and the adjacent liquid replenishing port 3234. The slow flow chamber 3236 on the last group of clamping blocks 322 cooperates with the liquid inlet pipe 112 through the upper liquid pipe 63 to input the liquid into the detection sleeve 11. The liquid entering the detection sleeve 11 fills the detection sleeve 11 and then returns to the external heat preservation liquid supply mechanism through the liquid outlet pipe 111, realizing the circulation of the heat preservation liquid. Since the liquid moves from bottom to top as a whole, the air in the pipeline will be discharged during the movement of the liquid, avoiding the air from slowing down the heat transfer and keeping the temperature of the specimen 23 constant, thus improving the accuracy of the detection result of the specimen 23.

[0044] When the present invention is specifically implemented, the preparations before detection are first carried out. According to the raw materials such as asphalt and aggregates used in actual projects, the asphalt mixture is accurately weighed and prepared according to the designed mix ratio. At the same time, ensure that the quality and performance of the binder meet the requirements. For example, the viscosity and curing time of the binder should match the test conditions and the actual project. After that, equipment such as a Marshall compactor or a rotary compactor is used to prepare the asphalt mixture specimen 23, and the asphalt mixtures of different layers are compacted layer by layer to form a composite specimen 23 with interlayer bonding. During the forming process of the specimen 23, parameters such as the compaction temperature and compaction times of each layer are strictly controlled to ensure the density and interlayer bonding effect of the specimen 23. For some tests with special requirements, other forming methods such as the static pressure method can be used to prepare the specimen 23. The prepared specimen 23 is cured under the specified temperature and humidity conditions to make the asphalt mixture fully cured and stable, and at the same time ensure that the binder reaches the best bonding performance. The curing temperature is generally normal temperature or a specific temperature determined according to the actual project environment, and the curing time is usually a certain number of days, such as 7 days, 14 days, etc., to ensure that the performance of the specimen 23 is stable before detection can be carried out;

[0045] When detecting, the paste piece 223 and the specimen 23 are fixedly connected by pasting. The liquid supply pipe 4151 and the liquid discharge pipe 111 are respectively communicated with an external heat preservation liquid supply mechanism to make the heat preservation liquid flow. The specimen 23 is placed on the sample loading tray 41. The clamping motor 3241 is started, and the clamping motor 3241 drives the clamping tray 31 to rotate. Multiple groups of clamping blocks 322 move closer to each other synchronously to clamp and fix the specimen 23. During this process, the sample loading tray 41 drives the specimen 23 to move upward to the detection point. The cleaning frame 51 drives the cleaning block 52 to move upward. After that, the lower force transmission rod 222 is connected to the paste piece 223. After that, the upper force transmission rod 221 is connected to the tensiometer 21. The tensiometer 21 is started, and the tensiometer 21 pulls the paste piece 223 upward to detect the interlayer bonding strength of the asphalt pavement.

[0046] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and, without departing from the purpose of the present invention, creatively design a structural manner and an embodiment similar to the technical solution, they shall fall within the protection scope of the present invention.

Claims

1. An asphalt pavement interlayer bonding strength detection device, comprising a bearing base (1), a detection sleeve (11) being provided on the bearing base (1), a detection mechanism (2) being provided on the inner side of the detection sleeve (11) of the bearing base (1), the detection mechanism (2) comprising a tensile gauge (21), a sensor (22), an upper force transmission rod (221), a lower force transmission rod (222) and an adhesive member (223), the upper force transmission rod (221) and the lower force transmission rod (222) being connected at both ends of the sensor (22), the upper force transmission rod (221) being connected to the tensile machine via a thread, and the lower force transmission rod (222) being connected to the adhesive member (223) via a thread, characterized in that: The bearing base (1) is provided with a sample loading mechanism (4) for moving the sample (23) to a detection position, and the bearing base (1) is provided with a clamping mechanism (3) for cooperating with the sample loading mechanism (4) to clamp the sample (23), and the sample loading mechanism (4) moves with the clamping mechanism (3); The clamping mechanism (3) comprises a support sleeve (324) arranged on the bearing base (1), a clamping support plate (31) being rotatably arranged on the support sleeve (324), a clamping slide groove (311) being arranged on the clamping support plate (31), a clamping motor (3241) for driving the clamping support plate (31) to rotate being arranged in the support sleeve (324), a bearing slide block (322) being arranged at the upper end of the bearing slide block (32), and a clamping slide column (321) being slidably matched with the clamping slide groove (311) being arranged at the lower end of the bearing slide block (32); The loading mechanism (4) comprises a loading support plate (41) slidably arranged on a supporting base (1); a driving column (42) connected to the clamping support plate (31) is rotatably arranged on the supporting base (1); a driving gear (421) is arranged on the driving column (42); a matching gear (43) meshing with the driving gear (421) is rotatably arranged on the supporting base (1); a matching column (431) is arranged on the matching gear (43); a matching column (431) is arranged on the matching column (431); The slide groove (432) comprises an oblique slide groove (4321) and a transverse slide groove (4322) which are connected to each other. The lower end of the sample loading support plate (41) is provided with a movable sleeve (416). A movable spring (4162) is provided in the movable sleeve (416). A movable slide rod (4161) connected to the movable spring (4162) is slidably provided in the movable sleeve (416). The movable slide rod (4161) is slidably connected to the matching slide groove (432). The bearing base (1) is provided with a cleaning mechanism (5) for cleaning the detection sleeve (11) as it moves with the clamping block (322), and the bearing base (1) is provided with a heat preservation mechanism (6) for heat preservation of the sample (23).

2. The asphalt pavement interlayer bonding strength detection device according to claim 1 is characterized in that: A cleaning frame (51) is slidably provided in the detection sleeve (11), a cleaning block (52) is provided on the cleaning frame (51), a linkage arm (552) is rotatably provided on the detection sleeve (11), a linkage groove wheel (553) is provided at one end of the linkage arm (552), a connecting rope (541) is provided on the cleaning frame (51) and passes through the linkage groove wheel (553) and is connected to the detection sleeve (11), a linkage sliding column (554) is provided at the other end of the linkage arm (552), a linkage frame (55) is provided on the clamping block (322), and a linkage sliding block (551) is provided on the linkage frame (55) and is slidably matched with the linkage sliding column (554).

3. The asphalt pavement interlayer bonding strength detection device according to claim 2 is characterized in that: The cleaning frame (51) is provided with a connecting sleeve (53), the connecting sleeve (53) being symmetrically arranged on both sides of the connecting rope (541), a connecting spring (532) being arranged in the connecting sleeve (53), a connecting slide rod (531) connected to the connecting spring (532) being slidably arranged in the connecting sleeve (53), and one end of the connecting slide rod (531) extending out of the connecting sleeve (53) is connected to the bearing base (1).

4. The asphalt pavement interlayer bonding strength detection device according to claim 1, characterized in that: The lower end of the sample loading support plate (41) is provided with a heat-insulating jacket (414), and the lower end of the heat-insulating jacket (414) is connected to a liquid inlet jacket (415). The clamping block (322) is provided with a slow flow chamber (3236), and a plurality of groups of the slow flow chambers (3236) are connected to each other. The detection sleeve (11) is a hollow structure, and the detection sleeve (11) is connected to one group of the slow flow chambers (3236), and the heat-insulating jacket (414) is connected to another group of the slow flow chambers (3236).

5. The asphalt pavement interlayer bonding strength detection device according to claim 4 is characterized in that: The detection sleeve (11) is connected to a liquid outlet pipe (111), one end of the heat-insulating jacket (414) is provided with a heat-insulating port (4141), one end of the liquid inlet jacket (415) is connected to a liquid delivery pipe (4151), the slow-flow chamber (3236) is provided with a liquid replenishment port (3234) and a liquid return port (3235), the heat-insulating mechanism (6) comprises a connecting pipe (61), a liquid replenishment pipe (62) and an upper liquid pipe (63), a group of the slow-flow chamber ( A connecting pipe (61) is provided between the liquid replenishment port (3234) on one group of slow flow chambers (3236) and the liquid return port (3235) on an adjacent group of the slow flow chambers (3236); a liquid replenishment pipe (62) is provided between the heat preservation port (4141) and the liquid replenishment port (3234) on one group of the slow flow chambers (3236); and an upper liquid pipe (63) is provided between the liquid return port (3235) on another group of the slow flow chambers (3236) and the liquid inlet pipe (112).

6. The asphalt pavement interlayer bonding strength detection device according to claim 4, characterized in that: A slow flow mechanism (323) for slowing down the flow of liquid is provided in the slow flow cavity (3236), the slow flow mechanism (323) comprising a partition plate (3231), a connecting hole (3233) being provided on the partition plate (3231), slow flow plates (3232) being provided at both ends of the partition plate (3231), and a plurality of groups of slow flow plates (3232) being arranged in a staggered manner.

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