Sampling device for asphalt pavement detection

Abstract

The invention belongs to the field of asphalt pavement detection sampling, and particularly relates to an asphalt pavement detection sampling device which comprises a supporting bottom plate, inclined supporting rods are fixedly arranged on the periphery of the upper portion of the supporting bottom plate, a plurality of guide rods are fixedly arranged on the outer sides of the inclined supporting rods, and the bottom ends of the guide rods are fixedly connected with the upper portion of the supporting bottom plate. An extrusion mechanism is arranged on the upper portion of the supporting bottom plate, a stabilizing mechanism is arranged at the lower end of the extrusion mechanism, and a top plate is jointly arranged at the top ends of the four inclined supporting rods. In the process of drilling and coring the asphalt pavement through the sampling mechanism, as the drilling depth of the drilling pipe is gradually increased, the supporting bottom plate can be subjected to multiple extrusion stabilization, so that the supporting bottom plate is more stable during drilling and coring, workers do not need to manually press and stabilize the supporting bottom plate, and the working efficiency is improved. The labor intensity of workers is relieved, meanwhile, the sample core in the drill pipe can be automatically taken out after drilling and coring are finished, and the working process of drilling and coring is simplified.

Description

Technical Field

[0001] The invention belongs to the field of asphalt pavement detection sampling, and in particular relates to a sampling device for asphalt pavement detection. Background Art

[0002] After the asphalt pavement paving project is successfully completed or enters the trial operation stage for a period of time, in order to comprehensively evaluate the paving quality and performance of the asphalt pavement, it is necessary to conduct in-depth inspections on each paving layer of the asphalt pavement to ensure the safety, durability and driving comfort of the road. When inspecting the asphalt pavement, a sampling device is required to take samples of the asphalt pavement.

[0003] At present, when sampling an asphalt pavement, the sampling frame is usually moved to the position where the sampling is required, and then the driving mechanism on the sampling frame drives the drill pipe to rotate. While the drill pipe rotates, the drill pipe is slowly moved down to drill and coring the asphalt pavement. After the drill pipe moves down to a suitable depth, the drill pipe is stopped from rotating, and then the drill pipe is driven to move up to move it out of the inside of the asphalt pavement, and finally the sample core is taken out from the inside of the drill pipe by knocking the drill pipe. However, in the process of working, as the drilling depth of the drill pipe gradually deepens, the vibration force on the sampling frame will increase, which will affect the stability of the sampling frame. In order to keep the drill pipe for normal drilling and coring, the staff usually use their hands to press down the sampling frame to stabilize it. During this process, the staff needs to continue to exert force, which not only increases their physical exertion, but also may cause muscle tension and fatigue due to the vibration of the sampling frame, greatly affecting the efficiency and safety of the sampling work. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a sampling device for asphalt pavement testing to improve the stability of the supporting base plate during coring and ensure the normal progress of the coring work. At the same time, after the coring is completed, the sample core inside the drill pipe can be automatically removed, simplifying the coring workflow.

[0005] In order to achieve the above-mentioned purpose, the embodiments of the present application provide the following technical solutions: The present invention provides a sampling device for asphalt pavement detection, including a supporting base plate, wherein diagonal support rods are fixedly arranged on all four sides of the upper part of the supporting base plate, a plurality of guide rods are fixedly arranged on the outer sides of the diagonal support rods, and the bottom ends of the guide rods are fixedly connected to the upper part of the supporting base plate, an extrusion mechanism is arranged on the upper part of the supporting base plate, a stabilization mechanism is arranged on the lower end of the extrusion mechanism, a top plate is commonly arranged at the top ends of the four diagonal support rods, a hydraulic rod is fixedly arranged on the top plate, a U-shaped plate is fixedly arranged on the bottom end of the hydraulic rod, a mounting plate is fixedly arranged on the bottom of the U-shaped plate, and a sampling mechanism is arranged on the mounting plate.

[0006] The extrusion mechanism includes a first extrusion frame, a second extrusion frame and a third extrusion frame. The first extrusion frame, the second extrusion frame and the third extrusion frame are distributed at equal intervals from top to bottom on the upper end of the supporting base plate, and the four corners of the first extrusion frame, the second extrusion frame and the third extrusion frame are movably mounted on corresponding guide rods respectively. Connecting plates are provided on the left and right sides of the bottom of the first extrusion frame and the second extrusion frame, and cavities are provided on the left and right sides inside the second extrusion frame and the third extrusion frame, and a positioning mechanism used in conjunction with the connecting plate is provided in the cavity.

[0007] The stabilizing mechanism comprises three moving frames, four corners of the three moving frames are movably sleeved with corresponding guide rods respectively, and the three moving frames are distributed in equal intervals from top to bottom at the lower end of the third extrusion frame.

[0008] According to a favorable embodiment, the positioning mechanism includes a cross bar fixedly arranged in the cavity and symmetrically distributed front to back, a cross plate is slidably arranged between the two cross bars, a first spring is sleeved on the outer side of the cross bar, and the two ends of the first spring are respectively connected to the inner wall of the cavity and one side of the cross plate, an insertion plate is fixedly arranged on the side of the cross plate away from the first spring, and the side of the insertion plate away from the cross plate passes through the cavity, a slot for cooperating with the insertion plate is opened on the side of the connecting plate close to the insertion plate, and the side of the insertion plate away from the cross plate is plugged into the slot.

[0009] According to an advantageous embodiment, an electromagnet is fixedly disposed inside the cavity, and a magnetic block used in conjunction with the electromagnet is fixedly disposed on a side of the transverse plate close to the electromagnet.

[0010] According to a preferred embodiment, the front and rear sides of the first extrusion frame and the second extrusion frame are both provided with sliding grooves, a slider is slidably arranged in the sliding groove, a connecting rod is hingedly arranged on the side of the slider away from the sliding groove, the four connecting rods at the upper end are hinged to the outer side of the second extrusion frame at one end away from the corresponding slider, and the four connecting rods at the lower end are hinged to the outer side of the third extrusion frame at one end away from the corresponding slider.

[0011] According to a favorable embodiment, the stabilizing mechanism also includes a positioning ring fixedly arranged on the outside of the guide rod, a second spring is sleeved on the outside of the guide rod, and the two ends of the second spring are respectively connected to the bottom of the movable frame and the upper part of the positioning ring, and a pressure plate is fixedly arranged at the bottom end of the movable frame, and the bottoms of the multiple pressure plates are located in the same horizontal plane.

[0012] According to a favorable embodiment, the sampling mechanism includes a rotating rod rotatably arranged at the bottom of the mounting plate, and the top end of the rotating rod moves through the mounting plate, a drill pipe is threadedly arranged on the outer side of the lower end of the rotating rod, a motor is fixedly arranged on the right side of the bottom of the mounting plate, pulleys are arranged on the output shaft of the motor and the outer side of the rotating rod, and a belt is arranged between the two pulleys, a rectangular plate is fixedly arranged on the inner side of the third extrusion frame, the rectangular plate is located on the outer side of the drill pipe, and the drill pipe is rotatably connected to the rectangular plate.

[0013] According to a favorable embodiment, a connecting ring is placed on the upper part of the drill pipe, and the bottom end of the rotating rod movably passes through the connecting ring, vertical rods are arranged around the bottom of the connecting ring, the bottom ends of the vertical rods are movably inserted into the interior of the drill pipe, and a push plate is commonly arranged at the bottom ends of the four vertical rods.

[0014] According to a favorable embodiment, a pushing mechanism for cooperating with a pushing plate is provided at the bottom end of the top plate, and the pushing mechanism includes two fixed rods arranged at the bottom end of the connecting plate, and the two fixed rods are symmetrically distributed on the left and right sides of the bottom of the top plate, and an arc plate is fixedly provided at the bottom of the fixed rod, and arc-shaped openings for cooperating with the arc plate are opened on the left and right sides of the connecting plate, and the bottom end of the fixed rod passes through the arc-shaped opening.

[0015] According to a favorable embodiment, a water inlet pipe is rotatably arranged on the upper part of the rotating rod, a water inlet cavity is opened inside the rotating rod, and the water inlet pipe is connected to the water inlet cavity, and a water outlet connected to the water inlet cavity is opened at the bottom end of the rotating rod.

[0016] According to a preferred embodiment, the left and right sides of the second extruded frame and the third extruded frame are respectively fitted with one side of the corresponding connecting plate, and the upper part of the second extruded frame is fitted with the bottom of the first extruded frame, and the upper part of the third extruded frame is fitted with the bottom of the second extruded frame.

[0017] Compared with the prior art, the sampling device for asphalt pavement detection provided by the embodiment of the present invention has the following beneficial effects:

[0018] 1. In the process of drilling and coring asphalt pavement by the sampling mechanism of the present invention, as the drilling depth of the drill pipe gradually deepens, the supporting bottom plate can be squeezed and stabilized multiple times to make the supporting bottom plate more stable during the drilling and coring. There is no need for the staff to manually press and stabilize the supporting bottom plate, which reduces the labor intensity of the staff. At the same time, the sample core inside the drill pipe can be automatically taken out after the drilling and coring is completed, which simplifies the working process of drilling and coring.

[0019] 2. The present invention utilizes the cooperation of the positioning mechanism, the electromagnet and the magnetic block, so that during the process of drilling and coring, the first extrusion frame, the second extrusion frame and the third extrusion frame can be gradually separated, thereby utilizing the cooperation of the movable frame and the pressure plate to gradually enhance the extrusion force on the supporting base plate, thereby ensuring the high stability of the supporting base plate during the entire drilling and coring process, and further ensuring the coring effect during drilling and coring.

[0020] 3. The present invention utilizes the cooperation of the pushing mechanism, the connecting ring and the pushing plate to greatly improve the coring efficiency, while ensuring the integrity of the sample core and the smoothness of the removal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 It is a connection structure diagram of the extrusion mechanism and the connecting plate in the present invention.

[0023] Figure 3 It is a cross-sectional structural diagram of the connection between the extrusion mechanism and the connecting plate in the present invention.

[0024] Figure 4 It is a connection structure diagram of the second extrusion frame and the connection plate in the present invention.

[0025] Figure 5 It is a cross-sectional structural diagram of the partial explosion connection between the second extrusion frame and the connecting plate in the present invention.

[0026] Figure 6 It is a structural diagram of the connection between the stabilizing mechanism and the guide rod in the present invention.

[0027] Figure 7 It is a connection structure diagram of the mounting plate and the sampling mechanism in the present invention.

[0028] Figure 8 It is a partial cross-sectional view of the connection structure between the rotating rod and the drill pipe in the present invention.

[0029] Fig. 9 for Figure 3 A magnified view of the structure in part A.

[0030] Fig.10 for Figure 8 A magnified view of the structure of part B.

[0031] Fig.11 The present invention is a state diagram of performing a heavy extrusion on the supporting base plate when working.

[0032] Fig.12 A state diagram of double extrusion of the supporting base plate when the present invention is working.

[0033] Fig.13A state diagram of triple extrusion of the supporting base plate when the present invention is working.

[0034] Reference numerals in the figure: 1, supporting bottom plate; 2, diagonal support rod; 3, guide rod; 4, extrusion mechanism; 401, first extrusion frame; 402, second extrusion frame; 403, third extrusion frame; 5, stabilizing mechanism; 501, moving frame; 502, positioning ring; 503, second spring; 504, pressing plate; 6, top plate; 7, hydraulic rod; 8, U-shaped plate; 9, mounting plate; 10, sampling mechanism; 101, rotating rod; 102, drill pipe; 103, motor; 104, pulley; 105, belt ; 11. connecting plate; 12. cavity; 13. positioning mechanism; 131. cross bar; 132. cross plate; 133. first spring; 134. plug plate; 14. slot; 15. electromagnet; 16. magnetic block; 17. slide groove; 18. slider; 19. connecting rod; 20. rectangular plate; 21. connecting ring; 22. vertical rod; 23. push plate; 24. pushing mechanism; 241. fixing rod; 242. arc plate; 25. arc mouth; 26. water inlet pipe; 27. water inlet cavity; 28. water outlet. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-13 This application is further described in detail.

[0036] Please refer to Figure 1 and Figure 7 A sampling device for asphalt pavement detection includes a supporting base plate 1, diagonal braces 2 are fixedly arranged around the upper part of the supporting base plate 1, a plurality of guide rods 3 are fixedly arranged on the outer side of the diagonal braces 2, and the bottom ends of the guide rods 3 are fixedly connected to the upper part of the supporting base plate 1, an extrusion mechanism 4 is arranged on the upper part of the supporting base plate 1, a stabilization mechanism 5 is arranged at the lower end of the extrusion mechanism 4, a top plate 6 is commonly arranged at the top ends of the four diagonal braces 2, a hydraulic rod 7 is fixedly arranged on the top plate 6, a U-shaped plate 8 is fixedly arranged at the bottom end of the hydraulic rod 7, a mounting plate 9 is fixedly arranged at the bottom of the U-shaped plate 8, and a sampling mechanism 10 is arranged on the mounting plate 9.

[0037] In the process of core sampling of asphalt pavement, the sampling work can be carried out using the sampling mechanism 10, and in the sampling process, the cooperation of the squeezing mechanism 4 and the stabilizing mechanism 5 can make the supporting base plate 1 more stable, ensuring that the core sampling work can be carried out normally while reducing the labor intensity of the staff.

[0038] See also Figure 7The sampling mechanism 10 includes a rotating rod 101 rotatably arranged at the bottom of the mounting plate 9, and the top end of the rotating rod 101 movably passes through the mounting plate 9, a drill pipe 102 is threadedly arranged on the outer side of the lower end of the rotating rod 101, and a motor 103 is fixedly arranged on the right side of the bottom of the mounting plate 9, and a pulley 104 is arranged on the output shaft of the motor 103 and the outer side of the rotating rod 101, and a belt 105 is arranged between the two pulleys 104.

[0039] In order to perform core sampling on the asphalt pavement, the staff places the supporting base plate 1 at the position where sampling is required, and the hydraulic rod 7 works to drive the U-shaped plate 8 to move downward, and the downward movement of the U-shaped plate 8 drives the mounting plate 9 to move downward, and the downward movement of the mounting plate 9 drives the drill pipe 102 to move downward through the rotating rod 101. At the same time, the motor 103 works, and the cooperation of the pulley 104 and the belt 105 can drive the rotating rod 101 to rotate, and the rotation of the rotating rod 101 drives the drill pipe 102 to rotate, so that the drill pipe 102 can be in a rotating state during the downward movement. As the drill pipe 102 continues to move downward and contact the asphalt pavement, the asphalt pavement can be drilled and cored through the drill pipe 102.

[0040] See also Figure 7 , Figure 8 and Fig.10 A water inlet pipe 26 is rotatably provided at the upper part of the rotating rod 101 , a water inlet cavity 27 is opened inside the rotating rod 101 , and the water inlet pipe 26 is connected to the water inlet cavity 27 , and a water outlet 28 connected to the water inlet cavity 27 is opened at the bottom end of the rotating rod 101 .

[0041] In order to avoid the reduction of structural strength due to excessive temperature when the drill pipe 102 rotates at high speed for sampling during drilling of asphalt pavement, during the process of rotating the drill pipe 102 for drilling and coring, external water is introduced into the water inlet chamber 27 of the rotating rod 101 through the water inlet pipe 26, and then the water flows out through the water outlet 28 and enters the interior of the drill pipe 102 and covers the bottom end of the drill pipe 102, which can effectively reduce the surface temperature of the drill pipe 102 and prevent it from overheating and damage during drilling and coring.

[0042] See also Figure 1 , Figure 2 , Figure 3The extrusion mechanism 4 includes a first extrusion frame 401, a second extrusion frame 402 and a third extrusion frame 403. The first extrusion frame 401, the second extrusion frame 402 and the third extrusion frame 403 are distributed at equal intervals from top to bottom on the upper end of the supporting base plate 1, and the four corners of the first extrusion frame 401, the second extrusion frame 402 and the third extrusion frame 403 are movably mounted on the corresponding guide rods 3 respectively. A rectangular plate 20 is fixedly arranged on the inner side of the third extrusion frame 403, and the rectangular plate 20 is located on the outer side of the drill pipe 102, and the drill pipe 102 is rotatably connected to the rectangular plate 20. Connecting plates 11 are arranged on the left and right sides of the bottom of the first extrusion frame 401 and the second extrusion frame 402, and cavities 12 are opened on the left and right sides of the second extrusion frame 402 and the third extrusion frame 403. A positioning mechanism 13 used in conjunction with the connecting plate 11 is arranged in the cavity 12. By utilizing the cooperation between the positioning mechanism 13 and the connecting plate 11 , the first extrusion frame 401 , the second extrusion frame 402 and the third extrusion frame 403 can move synchronously during the movement process.

[0043] See also Figure 1 and Figure 6 The stabilizing mechanism 5 includes three moving frames 501, and the four corners of the three moving frames 501 are movably mounted on the corresponding guide rods 3, and the three moving frames 501 are distributed at equal intervals from top to bottom at the lower end of the third extrusion frame 403. A pressing plate 504 is fixedly arranged at the bottom end of the moving frame 501, and the bottoms of the multiple pressing plates 504 are located in the same horizontal plane. During the synchronous movement of the first extrusion frame 401, the second extrusion frame 402 and the third extrusion frame 403, they can contact the corresponding moving frame 501 and push the moving frame 501 to move downward.

[0044] See also Figure 4 , Figure 5 and Fig.11 The positioning mechanism 13 includes a cross bar 131 fixedly arranged in the cavity 12 and symmetrically distributed front to back, a cross plate 132 is slidably arranged between the two cross bars 131, a first spring 133 is sleeved on the outer side of the cross bar 131, and the two ends of the first spring 133 are respectively connected to the inner wall of the cavity 12 and one side of the cross plate 132, a plug plate 134 is fixedly arranged on the side of the cross plate 132 away from the first spring 133, and the side of the plug plate 134 away from the cross plate 132 passes through the cavity 12, and a slot 14 used in conjunction with the plug plate 134 is opened on the side of the connecting plate 11 close to the plug plate 134, and the side of the plug plate 134 away from the cross plate 132 is plugged into the slot 14.

[0045] In order to improve the stability of the supporting base plate 1 during the sampling process, during the downward movement of the drill pipe 102, the rectangular plate 20 can be used to drive the third extrusion frame 403 to move downward. Since the plug plate 134 is inserted into the slot 14 at this time, the downward movement of the third extrusion frame 403 can drive the first extrusion frame 401 and the second extrusion frame 402 to move downward synchronously. When the first extrusion frame 401 contacts the moving frame 501 at the upper end, the moving frame 501 at the upper end will be squeezed and driven to move downward. When the second extrusion frame 402 contacts the moving frame 501 at the middle, the pressure plate 504 at the bottom of the upper moving frame 501 contacts the supporting base plate 1. The supporting base plate 1 can be squeezed by the pressure plate 504, so that the supporting base plate 1 is more stable during drilling and coring, and the moving frame 501 at the upper end no longer moves downward.

[0046] See also Figure 3 , Figure 5 , Fig. 9 , Fig.12 and Fig.13 The cavity 12 is fixedly provided with an electromagnet 15, and a magnetic block 16 used in conjunction with the electromagnet 15 is fixedly provided on one side of the horizontal plate 132 close to the electromagnet 15. Slide grooves 17 are provided on both the front and rear sides of the first extrusion frame 401 and the second extrusion frame 402, and a slider 18 is slidably provided in the slide groove 17. A connecting rod 19 is hingedly provided on the side of the slider 18 away from the slide groove 17. The ends of the four connecting rods 19 at the upper end away from the corresponding sliders 18 are hinged to the outer side of the second extrusion frame 402, and the ends of the four connecting rods 19 at the lower end away from the corresponding sliders 18 are hinged to the outer side of the third extrusion frame 403.

[0047] In order to further ensure the stability of the supporting bottom plate 1 during the sampling process, as mentioned above, when the moving frame 501 at the upper end no longer moves downward, and the second extrusion frame 402 contacts the moving frame 501 at the middle, the electromagnet 15 inside the second extrusion frame 402 works to magnetically adsorb the corresponding magnetic block 16, and the magnetic block 16 moves to fit with the electromagnet 15, and the movement of the magnetic block 16 drives the corresponding horizontal plate 132 to move, and the movement of the horizontal plate 132 drives the corresponding plug-in plate 134 to move out of the corresponding slot 14. The connection between the second extrusion frame 402 and the first extrusion frame 401 is cancelled, so that when the drill pipe 102 continues to move downward, the first extrusion frame 401 no longer moves downward, and the second extrusion frame 402 and the third extrusion frame 403 continue to move downward. The downward movement of the second extrusion frame 402 will squeeze the moving frame 501 in the middle and drive it to move downward. When the third extrusion frame 403 contacts the moving frame 501 at the lower end, the pressing plate 504 at the bottom end of the moving frame 501 in the middle and the supporting bottom plate 1, the support base plate 1 can be further squeezed by the pressure plate 504, so that the support base plate 1 is more stable during the core drilling. In the process of the second squeezing frame 402 moving downward, the first squeezing frame 401 can be continuously pulled by the cooperation of the connecting rod 19 and the slider 18, so that the pressure plate 504 at the bottom of the upper moving frame 501 will not be separated from the support base plate 1. Similarly, as the drill pipe 102 continues to move downward, the electromagnet 15 and the magnetic block 1 located inside the third squeezing frame 403 can be used to pull the first squeezing frame 401 continuously. 6, the connection between the second extrusion frame 402 and the third extrusion frame 403 can be cancelled. The downward movement of the third extrusion frame 403 can drive the pressure plate 504 located at the bottom of the lower movable frame 501 to contact the support base plate 1, and then in the process of core sampling, as the drill pipe 102 continues to move downward, the support base plate 1 can be triple squeezed to make the support base plate 1 more stable during core drilling, and there is no need for the staff to manually press the support base plate 1 to stabilize it, thereby reducing the labor intensity of the staff.

[0048] See also Figure 2 and Figure 6 The stabilizing mechanism 5 further includes a positioning ring 502 fixedly arranged on the outer side of the guide rod 3. A second spring 503 is sleeved on the outer side of the guide rod 3, and the two ends of the second spring 503 are respectively connected to the bottom of the moving frame 501 and the upper part of the positioning ring 502. The left and right sides of the second extrusion frame 402 and the third extrusion frame 403 are respectively fitted with one side of the corresponding connecting plate 11, and the upper part of the second extrusion frame 402 is fitted with the bottom of the first extrusion frame 401, and the upper part of the third extrusion frame 403 is fitted with the bottom of the second extrusion frame 402.

[0049] In order to facilitate the reset of the movable frame 501 after drilling and coring, after drilling and coring, the hydraulic rod 7 works to drive the drill pipe 102 to move upward. At this time, the rectangular plate 20 will drive the third extrusion frame 403 to move upward. As the third extrusion frame 403 moves upward, it will drive the first extrusion frame 401 and the second extrusion frame 402 to move upward in turn, thereby canceling the extrusion of the movable frame 501. The elastic force of the second spring 503 can be used to drive the movable frame 501 to reset. At this time, the first extrusion frame 401, the second extrusion frame 402 and the third extrusion frame 403 also return to the initial position. Then, the electromagnet 15 stops working and cancels the magnetic adsorption of the magnetic block 16. The elastic force of the first spring 133 can be used to push the cross plate 132 to slide on the cross bar 131, so that the plug plate 134 is reinserted into the corresponding slot 14, and then the first extrusion frame 401, the second extrusion frame 402 and the third extrusion frame 403 are reconnected together, which is convenient for continuing to squeeze and stabilize the support base plate 1 when drilling and coring work is performed next time.

[0050] See also Figure 1 , Figure 7 , Figure 8 and Fig.10 A connecting ring 21 is placed on the upper part of the drill pipe 102, and the bottom end of the rotating rod 101 movably passes through the connecting ring 21. Vertical rods 22 are arranged around the bottom of the connecting ring 21. The bottom ends of the vertical rods 22 are movably inserted into the interior of the drill pipe 102, and a push plate 23 is commonly arranged at the bottom ends of the four vertical rods 22. A pushing mechanism 24 used in conjunction with the push plate 23 is arranged at the bottom end of the top plate 6. The pushing mechanism 24 includes two fixed rods 241 arranged at the bottom end of the connecting plate 11, and the two fixed rods 241 are symmetrically distributed at the bottom of the top plate 6. An arc plate 242 is fixedly arranged at the bottom of the fixed rods 241. Arc openings 25 used in conjunction with the arc plate 242 are opened on both left and right sides of the connecting plate 11, and the bottom ends of the fixed rods 241 pass through the arc opening 25.

[0051] In order to facilitate the removal of the sample core inside the drill pipe 102 after the core drilling is completed, during the process of the drill pipe 102 moving downward for core drilling, as the sample core enters the inside of the drill pipe 102, it will contact and squeeze the push plate 23, so that as the drill pipe 102 moves downward, the push plate 23 inside it will gradually move upward, and the upward movement of the push plate 23 will drive the connecting ring 21 to move upward through the vertical rod 22. After the core drilling is completed, when the hydraulic rod 7 drives the drill pipe 102 to move upward, it will also drive the connecting ring 21 to move upward synchronously. As the drill pipe 102 moves upward, the connecting ring 21 will contact the arc plate 242, and the arc plate 242 can be used to squeeze the connecting ring 21, so that the push plate 23 moves downward inside the drill pipe 102 to drill The sample core inside the drill pipe 102 is pushed, so that the sample core inside the drill pipe 102 can slide out from the inside of the drill pipe 102, and then the auxiliary coring can be automatically performed during the upward movement of the drill pipe 102, making the drilling and coring work more convenient. When the sample core inside the drill pipe cannot be taken out by using the cooperation of the arc plate 242 and the connecting ring 21, the staff can rotate the drill pipe 102 to remove it from the rotating rod 101, and then turn the drill pipe 102 upside down and align the connecting ring 21 with the ground, and then drive the connecting ring 21 to collide with the ground through downward impact, so that the impact and extrusion force of the ground on the connecting ring 21 can push the push plate 23 inside the drill pipe 102 to move, and then the push plate 23 can be used to push out the sample core inside the drill pipe 102.

[0052] During specific work, in the process of drilling and coring the asphalt pavement, the mounting plate 9 is driven downward by the hydraulic rod 7, and then the coring work can be performed through the sampling mechanism 10. In the process of drilling and coring, as the drilling depth of the drill pipe 102 gradually deepens, the support base plate 1 can be triple-extruded and stabilized by the cooperation of the squeezing mechanism 4 and the stabilizing mechanism 5, so that the support base plate 1 is more stable during drilling and coring, and there is no need for the staff to manually press and stabilize the support base plate 1, which reduces the labor intensity of the staff. At the same time, the sample core inside the drill pipe 102 can be automatically taken out after the drilling and coring is completed, which simplifies the workflow of drilling and coring.

[0053] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sampling device for asphalt pavement testing, comprising a supporting base plate (1), characterized in that: The upper part of the support base plate (1) is fixedly provided with diagonal support rods (2) all around, a plurality of guide rods (3) are fixedly provided on the outer sides of the diagonal support rods (2), and the bottom ends of the guide rods (3) are fixedly connected to the upper part of the support base plate (1), the upper part of the support base plate (1) is provided with an extrusion mechanism (4), the lower end of the extrusion mechanism (4) is provided with a stabilization mechanism (5), the top ends of the four diagonal support rods (2) are jointly provided with a top plate (6), a hydraulic rod (7) is fixedly provided on the top plate (6), a U-shaped plate (8) is fixedly provided at the bottom end of the hydraulic rod (7), a mounting plate (9) is fixedly provided at the bottom of the U-shaped plate (8), and a sampling mechanism (10) is provided on the mounting plate (9); The extrusion mechanism (4) comprises a first extrusion frame (401), a second extrusion frame (402) and a third extrusion frame (403); the first extrusion frame (401), the second extrusion frame (402) and the third extrusion frame (403) are arranged at equal intervals from top to bottom on the upper end of the supporting bottom plate (1); and the four corners of the first extrusion frame (401), the second extrusion frame (402) and the third extrusion frame (403) are movably sleeved with corresponding guide rods (3) respectively; the left and right sides of the bottom of the first extrusion frame (401) and the second extrusion frame (402) are provided with connecting plates (11); the left and right sides of the inside of the second extrusion frame (402) and the third extrusion frame (403) are provided with cavities (12); and the cavity (12) is provided with a positioning mechanism (13) used in conjunction with the connecting plate (11); The stabilizing mechanism (5) comprises three movable frames (501), the four corners of the three movable frames (501) are movably mounted on corresponding guide rods (3), and the three movable frames (501) are distributed in sequence at equal intervals from top to bottom at the lower end of the third extrusion frame (403).

2. A sampling device for asphalt pavement detection according to claim 1, characterized in that: The positioning mechanism (13) comprises a cross bar (131) fixedly arranged in the cavity (12) and symmetrically distributed in the front and rear, a cross plate (132) is slidably arranged between the two cross bars (131), a first spring (133) is sleeved on the outer side of the cross bar (131), and the two ends of the first spring (133) are respectively connected to the inner wall of the cavity (12) and one side of the cross plate (132), a plug plate (134) is fixedly arranged on the side of the cross plate (132) away from the first spring (133), and the side of the plug plate (134) away from the cross plate (132) passes through the cavity (12), and a slot (14) used in conjunction with the plug plate (134) is opened on the side of the connecting plate (11) close to the plug plate (134), and the side of the plug plate (134) away from the cross plate (132) is plugged into the slot (14).

3. A sampling device for asphalt pavement detection according to claim 2, characterized in that: An electromagnet (15) is fixedly arranged inside the cavity (12), and a magnetic block (16) used in conjunction with the electromagnet (15) is fixedly arranged on one side of the transverse plate (132) close to the electromagnet (15).

4. The sampling device for asphalt pavement detection according to claim 1, characterized in that: The first extrusion frame (401) and the second extrusion frame (402) are provided with a sliding groove (17) on both the front and rear sides, and a slider (18) is slidably arranged in the sliding groove (17). A connecting rod (19) is hingedly arranged on the side of the slider (18) away from the sliding groove (17). The four connecting rods (19) at the upper end are hinged to the outer side of the second extrusion frame (402) at one end away from the corresponding slider (18), and the four connecting rods (19) at the lower end are hinged to the outer side of the third extrusion frame (403) at one end away from the corresponding slider (18).

5. The sampling device for asphalt pavement detection according to claim 1, characterized in that: The stabilizing mechanism (5) further comprises a positioning ring (502) fixedly arranged on the outside of the guide rod (3); a second spring (503) is sleeved on the outside of the guide rod (3); and two ends of the second spring (503) are respectively connected to the bottom of the moving frame (501) and the upper part of the positioning ring (502); a pressing plate (504) is fixedly arranged at the bottom end of the moving frame (501), and the bottoms of the plurality of pressing plates (504) are located on the same horizontal plane.

6. The sampling device for asphalt pavement detection according to claim 1, characterized in that: The sampling mechanism (10) comprises a rotating rod (101) rotatably arranged at the bottom of the mounting plate (9), and the top end of the rotating rod (101) movably passes through the mounting plate (9), a drill pipe (102) is threadedly arranged on the outer side of the lower end of the rotating rod (101), a motor (103) is fixedly arranged on the right side of the bottom of the mounting plate (9), a pulley (104) is arranged on the output shaft of the motor (103) and the outer side of the rotating rod (101), and a belt (105) is arranged between the two pulleys (104), and a rectangular plate (20) is fixedly arranged on the inner side of the third extrusion frame (403), the rectangular plate (20) is located on the outer side of the drill pipe (102), and the drill pipe (102) is rotatably connected to the rectangular plate (20).

7. The sampling device for asphalt pavement detection according to claim 6, characterized in that: A connecting ring (21) is placed on the upper part of the drill pipe (102), and the bottom end of the rotating rod (101) movably passes through the connecting ring (21). Vertical rods (22) are arranged around the bottom of the connecting ring (21), and the bottom ends of the vertical rods (22) are movably inserted into the interior of the drill pipe (102), and a push plate (23) is commonly arranged at the bottom ends of the four vertical rods (22).

8. The sampling device for asphalt pavement detection according to claim 7, characterized in that: A material pushing mechanism (24) for use with a pushing plate (23) is provided at the bottom end of the top plate (6), and the material pushing mechanism (24) comprises two fixing rods (241) provided at the bottom end of the connecting plate (11), and the two fixing rods (241) are symmetrically distributed at the bottom of the top plate (6), and an arc-shaped plate (242) is fixedly provided at the bottom of the fixing rods (241), and an arc-shaped opening (25) for use with the arc-shaped plate (242) is provided on both left and right sides of the connecting plate (11), and the bottom end of the fixing rod (241) passes through the arc-shaped opening (25).

9. The sampling device for asphalt pavement detection according to claim 6, characterized in that: A water inlet pipe (26) is rotatably provided at the upper part of the rotating rod (101), a water inlet chamber (27) is provided inside the rotating rod (101), and the water inlet pipe (26) is communicated with the water inlet chamber (27), and a water outlet (28) is provided at the bottom end of the rotating rod (101) and is communicated with the water inlet chamber (27).

10. The sampling device for asphalt pavement detection according to claim 1, characterized in that: The left and right sides of the second extrusion frame (402) and the third extrusion frame (403) are respectively fitted with one side of the corresponding connection plate (11), and the upper part of the second extrusion frame (402) is fitted with the bottom of the first extrusion frame (401), and the upper part of the third extrusion frame (403) is fitted with the bottom of the second extrusion frame (402).

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