Device and method for detecting compressive property of highway pavement

Abstract

The invention discloses a highway pavement compressive property detection device and detection method, and relates to the technical field of highway detection, the highway pavement compressive property detection device comprises a protection box, a pressurization mechanism and a sample placement mechanism; the interior of the protection box is hollow to form a detection cavity, a sample moving-in opening is formed in the center of the top of the protection box, an observation window is formed in one side of the front face of the protection box, a residue discharging opening is formed in one side of the back face of the protection box, and an inclined plate for guiding sample residues towards the residue discharging opening is installed in the detection cavity; the pressurizing mechanism comprises a portal frame, a pressurizing head assembly, a pressure detector and a hydraulic telescopic cylinder, the portal frame is fixedly installed on the top of the protection box, and the pressurizing head assembly is installed on the portal frame through the hydraulic telescopic cylinder in the mode that the pressurizing head assembly can move in the vertical direction. When the pavement block sample is subjected to compression resistance detection, the pavement block sample can be automatically moved into the detection cavity of the protection box to complete the compression resistance detection, so that the situation that fragments of the pavement block sample are easy to splash and scatter when the pavement block sample is crushed is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of highway detection, and in particular to a device and method for detecting the compression resistance of a highway pavement. Background Art

[0002] After the construction of each highway is completed, the highway's compressive capacity must be evaluated to determine whether the highway meets the standards for commissioning. Due to the large area of ​​the highway, the compressive capacity of roads in different terrains and regions will vary. Therefore, the core drilling sampling method is used when testing the road surface's compressive performance.

[0003] At present, when the pavement cut samples are tested multiple times, the pavement cut samples are placed on a placement table, and then the pavement samples are subjected to a compression test. After the test is completed, the sample debris is removed and the placement table is cleaned. When the pavement cut samples are squeezed and broken by the squeezing force, the pavement cut sample debris is prone to splash and scatter everywhere. The scattered sample debris is not easy to clean, which affects the efficiency of the next pavement cut sample compression test. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for detecting the compression resistance of a highway pavement, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: The present invention provides a road pavement compression resistance testing device, comprising a protection box, a pressurizing mechanism and a sample placing mechanism; The protection box is hollow inside to form a detection cavity, a sample removal port is opened at the center of the top of the protection box, an observation window is provided on one side of the front of the protection box, a slag discharge port is provided on one side of the back of the protection box, and an inclined plate is installed inside the detection cavity to guide the sample residue toward the slag discharge port; The pressurizing mechanism comprises a gantry, a pressurizing head assembly, a pressure detector and a hydraulic telescopic cylinder. The gantry is fixedly mounted on the top of the protective box. The pressurizing head assembly is mounted on the gantry through the hydraulic telescopic cylinder in a manner that it can move in a vertical direction. The pressurizing assembly is located directly above the sample entry port. The pressure detector is disposed between the hydraulic telescopic cylinder and the pressurizing head and is used to detect the pressure value applied by the pressurizing head to the sample. The sample placement mechanism includes a movable frame arranged in the sample moving inlet, a placement plate horizontally assembled at the bottom end of the movable frame, and an interference table fixed at the bottom of the detection chamber, the top of the interference table passes through the inclined plate, the interference table is located directly below the placement plate, and the top surface of the interference table is adapted to the bottom surface of the placement plate, and a sleeve structure is fixed on the top end of the movable frame, the sleeve structure is slidably matched with the pressure head assembly and can slide on the pressure head assembly in a vertical direction.

[0006] Furthermore, the movable frame includes four vertical rods distributed in a rectangular shape, and the top ends of the four vertical rods are fixedly connected to the sleeve structure. Among the four vertical rods, two of them are close to the back side of the protection box and are the first vertical rods, and the other two are close to the front side of the protection box and are the second vertical rods; the placement plate is arranged between the bottom ends of the four vertical rods, and the side of the placement plate close to the first vertical rod is rotatably connected to a pair of first vertical rods through a rotating shaft, and the side of the placement plate close to the second vertical rod is overlapped on a pair of second vertical rods through an overlapping structure, and the placement plate is in a horizontal state, and the highway pavement compression resistance performance testing device also includes a flipping mechanism for driving the placement plate to rotate around the central axis of the rotating shaft.

[0007] Furthermore, the overlapping structure includes an arc block fixed on opposite sides of a pair of second vertical rods, and an arc groove symmetrically arranged on both sides of the placement plate and corresponding to the two arc blocks, the bottom end of the arc groove passes through the placement plate, the top end of the arc groove does not pass through the placement plate, and the center of the arc block is on the central axis of the rotating shaft.

[0008] Furthermore, the pressure head assembly includes a pressure plate and a pressure column coaxially arranged on the top of the pressure plate, and the upper and lower ends of the outer wall of the pressure column are both provided with limit rings, and a sliding area is formed between the two limit rings; The sleeve structure includes a movable ring sleeved on the sliding area of ​​the pressurizing column and four connecting rods fixed on the outside of the sliding ring, and the four connecting rods extend and are fixedly connected to the top ends of the corresponding four vertical rods; The sample transfer port comprises four limiting grooves matched with the four vertical rods and a rectangular groove matched with the placement plate.

[0009] Furthermore, the thickness of the placement plate is greater than the wall thickness of the protection box, and the rotating mechanism includes extension strips symmetrically and vertically fixed at both ends of the placement plate close to the rotating shaft, and an elastic interference component installed on the back of the protection box, the height of the elastic interference component is higher than the top surface of the interference platform, the extension strip is located inside the detection cavity, and a first downward inclined surface is provided at the end of the extension strip away from the protection plate, the elastic interference component includes a strip-shaped outer shell fixed on the outer wall of the back of the protection box, a interference strip slidably arranged in the strip outer shell, and a first return spring arranged on the side of the interference strip away from the protection box, the interference strip is slidably arranged in a direction perpendicular to the back of the protection box, the side of the interference strip close to the protection box passes through the back of the protection box and extends into the detection cavity, and the side of the interference strip close to the protection box is provided with a second upward inclined surface, and the second inclined surface is adapted to the first inclined surface.

[0010] Furthermore, a preloaded torsion spring is installed between the rotating shaft and the first vertical bar, and the preloaded elastic force of the preloaded torsion spring can make the protective plate tightly attached to the arc block. The number of the elastic resistance components is at least two, and at least two elastic resistance components are distributed longitudinally.

[0011] Further, the observation window includes an opening provided on one side of the front face of the protection box, a rectangular frame provided at the opening and protruding outward, a protection component installed in the rectangular frame, and a high-strength transparent plate installed on a side of the rectangular frame away from the protection box; The protection assembly includes a plurality of flip plates vertically arranged in the rectangular frame, both ends of the flip plates are fixed with a rotating shaft, and the end of the rotating shaft away from the flip plate passes through the rectangular block and is fixedly equipped with a gear; The protection assembly also includes racks symmetrically arranged on both sides of the rectangular frame and meshing with corresponding gears, and a pair of racks are connected to the lower ends with horizontal bars; A T-shaped hole is provided at the center of the abutment platform, a transverse groove is provided horizontally below the T-shaped hole and aligned with the T-shaped hole, and a slot is provided on the front of the protection box on one side of the transverse groove; The protective assembly also includes a T-shaped block adapted in the T-shaped hole and an L-shaped plate horizontally arranged in the transverse groove, the L-shaped plate is fixedly connected to the bottom end of the T-shaped block, the height of the T-shaped block is greater than the depth of the T-shaped hole, a second return spring is arranged between the bottom of the L-shaped plate and the bottom of the transverse groove, and one end of the L-shaped plate away from the T-shaped block passes through the slot hole and is fixedly connected to the transverse bar.

[0012] The present invention also provides a method for detecting the compressive resistance of a highway pavement based on the above-mentioned highway pavement compressive resistance detecting device, comprising the following steps: Step 1: Place the pavement cut sample on the placement plate, adjust the position of the pavement cut sample so that the pavement cut sample moves to the center of the placement plate, start the hydraulic telescopic cylinder, and drive the pressure head assembly to move vertically downward; Step 2: When the pressure value appears on the pressure detector, the operator observes the compression process from the observation window. When the pavement cut sample is broken, the hydraulic telescopic cylinder stops working and drives the pressure head assembly to reset; Step 3: During the resetting process, the rotating mechanism drives the placement plate to rotate to an inclined position and then quickly resets; Step 3: After the pressure head assembly is reset, simply clean the surface of the placement plate with a cleaning brush.

[0013] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: 1. When the present invention performs compression test on the pavement cut sample, the pavement cut sample can be automatically moved into the detection cavity of the protection box to complete the compression test, so as to prevent the pavement cut sample from being easily splashed and scattered when the pavement cut sample is broken.

[0014] 2. When the present invention completes the compression test of the pavement cut sample, the pavement cut sample on the placement plate can be automatically dumped so that the next compression test can be quickly performed after the hydraulic telescopic cylinder is reset.

[0015] 3. At the moment when the pavement cut sample is broken, the present invention can automatically protect the observation window through the protection component to prevent the pavement cut sample debris from hitting the observation window, causing wear of the observation window and affecting the subsequent operator's observation of the pavement cut sample's compression process.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the top view of the structure of the present invention; Figure 3 yes Figure 2 AA structural diagram; Figure 4 yes Figure 1 Schematic diagram of the local structure at A; Figure 5 yes Figure 3Schematic diagram of the local structure at B; Figure 6 It is a schematic diagram of the structure of the sample placement mechanism and the pressure head group of the present invention from a first perspective; Figure 7 It is a schematic diagram of the structure of the sample placement mechanism and the pressure head group of the present invention from a second viewing angle; Figure 8 It is a schematic diagram of the detection cavity structure of the present invention.

[0019] In the figure: 1-protection box; 11-detection chamber; 12-sample transfer port; 13-observation window; 131-rectangular frame; 132-protection assembly; 1321-flip plate; 1322-rotation axis; 1323-gear; 1324-rack; 1325-cross bar; 1326-T-block; 1327-L-plate; 1328-second return spring; 133-high-strength transparent plate; 14-slag discharge port; 15-inclined plate; 16-slot hole; 2-pressurizing mechanism; 21-gantry; 22-pressurizing head assembly; 221-pressurizing plate; 222-pressurizing column; 223-limiting ring; 23-hydraulic telescopic cylinder; 3-sample placement mechanism; 31-movable frame; 311-vertical rod; 3111-first vertical rod; 3112-second vertical rod; 32-placing plate; 321-rotating shaft; 322-lap joint structure; 3221-arc block; 3222-arc groove; 33-contact table; 331-T-hole; 332-horizontal groove; 34-sleeve structure; 4- flip mechanism; 41- extension strip; 411- first inclined plane; 42- elastic resistance component; 421- strip-shaped housing; 422- resistance strip; 4221- second inclined plane; 423- first return spring. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0021] See also Figure 1-Figure 8 , the present invention provides a road pavement compression resistance testing device, comprising a protection box 1, a pressurizing mechanism 2, and a sample placing mechanism 3; When in use, the pavement cut sample is placed on the sample placing mechanism 3, and the pressurizing mechanism 2 applies pressure to the pavement cut sample placed on the sample placing mechanism 3 to detect at what pressure value the pavement cut sample will break, thereby detecting the compressive resistance of the pavement. In the process of applying pressure to the sample placing mechanism 3, the pavement cut sample is placed in the protective box 1 to prevent the pavement cut sample from being broken and the debris of the pavement cut sample from splashing and scattering everywhere, thereby improving the safety during the detection process and reducing the difficulty of subsequent cleaning of the pavement cut sample debris.

[0022] In this embodiment, the protection box 1 is hollow inside to form a detection cavity 11, a sample transfer port 12 is provided at the center of the top of the protection box 1, an observation window 13 is provided on one side of the front of the protection box 1, and a slag discharge port 14 is provided on one side of the back of the protection box 1. An inclined plate 15 is installed inside the detection cavity 11 to guide sample residues toward the slag discharge port 14; The pressurizing mechanism 2 includes a gantry 21, a pressurizing head assembly 22, a pressure detector (not shown) and a hydraulic telescopic cylinder 23. The gantry 21 is fixedly mounted on the top of the protective box 1. The pressurizing head assembly 22 is mounted on the gantry 21 through the hydraulic telescopic cylinder 23 in a manner that it can move in the vertical direction. The pressurizing assembly is located directly above the sample transfer port 12. The pressure detector is disposed between the hydraulic telescopic cylinder 23 and the pressurizing head and is used to detect the pressure value applied by the pressurizing head to the sample. The sample placement mechanism 3 includes a movable frame 31 arranged in the sample moving inlet 12, a placement plate 32 horizontally assembled at the bottom of the movable frame 31, and an abutment table 33 fixed at the bottom of the detection chamber 11, the top of the abutment table 33 passes through the inclined plate 15, the abutment table 33 is located directly below the placement plate 32, and the top surface of the abutment table 33 is adapted to the bottom surface of the placement plate 32, and a sleeve structure 34 is fixed to the top end of the movable frame 31, and the sleeve structure 34 is slidably matched with the pressure head assembly 22 and can slide on the pressure head assembly 22 in a vertical direction.

[0023] This embodiment is based on the above-mentioned arrangement. Initially, the hydraulic telescopic cylinder 23 is in a reset state (the length of the hydraulic telescopic cylinder 23 is the shortest). At this time, the pressure head assembly 22 is at the uppermost end of its moving stroke. Under the action of gravity, the sleeve structure 34 is at the lowermost end of the moving stroke of the pressure head assembly 22. The placement plate 32 is horizontally placed in the sample moving inlet 12, and the top surface of the placement plate 32 is flush with the top surface of the protective box 1.

[0024] When testing the pavement cut sample, the operator can place the collected pavement cut sample on the placement plate 32, and adjust the position of the pavement cut sample to move the pavement cut sample to the center of the placement plate 32, and then start the hydraulic telescopic cylinder 23 to perform the compression resistance test of the pavement cut sample; The specific compression resistance test process is as follows: the hydraulic telescopic cylinder 23 extends to drive the pressure head assembly 22 to move vertically downward. Since the placement plate 32 is equivalent to being suspended on the pressure head assembly 22 through the movable frame 31, the placement plate 32 and the pressure head assembly 22 move downward synchronously. During this process, the pressure head assembly 22 does not contact the pavement cut block sample, and the pavement cut block sample slowly moves into the detection chamber 11. As the hydraulic telescopic cylinder 23 continues to extend, when the bottom surface of the placement plate 32 contacts the top surface of the abutment table 33, the placement plate 32 stops moving downward (that is, the pavement cut block sample stops moving), and the hydraulic telescopic cylinder 23 continues to extend. The distance between the pressure head assembly 22 and the pavement cut block sample continues to decrease. During this process, the sleeve structure 34 at the top of the movable frame 31 moves upward on the pressure head assembly 22. displacement, when the pressure head assembly 22 contacts the pavement cut sample, the compression test begins. At this time, the operator can observe the specific compression process from the observation window 13. As the hydraulic telescopic cylinder 23 continues to extend, the pressure of the pressure head assembly 22 on the pavement cut sample continues to increase. The set pressure detector can detect the pressure value applied by the pressure head assembly 22 on the sample in real time. When the pressure applied by the pressure head assembly 22 on the pavement cut sample causes the pavement cut sample to break, the pressure detector can record the current value, and the pavement cut sample can be blocked by the protection box 1, and then fall onto the inclined plate 15 and converge and discharge from the slag discharge port 14 along the inclined plate 15. At this time, the hydraulic telescopic cylinder 23 can drive the pressure head assembly 22 to start resetting, completing the detection of the pavement compressive performance.

[0025] Although the protection box 1 can block and collect the crushed pavement cut samples, in fact most of the pavement cut samples remain on the placement plate 32. In order to clear the pavement cut samples on the placement plate 32 before resetting, the next pavement compression resistance work can be carried out quickly.

[0026] In this embodiment, the movable frame 31 includes four vertical rods 311 distributed in a rectangular shape, the top ends of the four vertical rods 311 are fixedly connected to the sleeve structure 34, and among the four vertical rods 311, two of them are close to the back side of the protection box 1 as the first vertical rods 3111, and the other two are close to the front side of the protection box 1 as the second vertical rods 3112; the placement plate 32 is arranged between the bottom ends of the four vertical rods 311, and the side of the placement plate 32 close to the first vertical rod 3111 is rotatably connected to a pair of first vertical rods 3111 through a rotating shaft 321, and the side of the placement plate 32 close to the second vertical rod 3112 is overlapped on a pair of second vertical rods 3112 through an overlap structure 322, and the placement plate 32 is in a horizontal state, and the highway pavement compression resistance performance detection device also includes a flip mechanism 4 for driving the placement plate 32 to rotate around the central axis of the rotating shaft 321. The flip mechanism 4 can be a motor.

[0027] The present embodiment is based on the above-mentioned arrangement. Initially, the two ends of the placement plate 32 can stably maintain a horizontal posture between the four vertical rods 311 through the rotating shaft 321 and the overlapping structure 322, so as to avoid the placement plate 32 tilting and causing the pavement cut sample to fall after the pavement cut sample is placed on the placement plate 32. When the pavement compressive performance detection work is completed and the hydraulic telescopic cylinder 23 drives the pressure head assembly 22 to start resetting, the flipping mechanism 4 can drive the placement plate 32 to rotate around the central axis of the rotating shaft 321 toward the slag discharge port 14 to rotate the placement plate 32 to an inclined posture, so that the pavement cut sample on the top surface of the placement plate 32 falls onto the inclined plate 15 for unified collection, thereby timely clearing the pavement cut sample on the placement plate 32 before resetting, so that the next pavement compressive performance work can be carried out quickly, thereby improving the detection efficiency of the present device.

[0028] In this embodiment, the overlap structure 322 includes arc blocks 3221 fixed on opposite sides of a pair of second vertical rods 3112, and arc grooves 3222 symmetrically arranged on both sides of the placement plate 32 and corresponding to the two arc blocks 3221, the bottom end of the arc groove 3222 penetrates the placement plate 32, the top end of the arc groove 3222 does not penetrate the placement plate 32, and the center of the arc block 3221 is on the central axis of the rotating shaft 321. When the placement plate 32 is in a horizontal posture, the arc blocks 3221 of the pair of second vertical rods 3112 are just stuck in the two arc grooves 3222 of the placement plate 32.

[0029] In this embodiment, the pressure head assembly 22 includes a pressure plate 221 and a pressure column 222 coaxially arranged on the top of the pressure plate 221. The upper and lower ends of the outer wall of the pressure column 222 are both provided with limit rings 223, and a sliding area is formed between the two limit rings 223. When the hydraulic telescopic cylinder 23 is in the reset state, the sleeve structure 34 is at the lower end of the sliding area.

[0030] In this embodiment, the sleeve structure includes a movable ring sleeved on the sliding area of ​​the pressure column 222 and four connecting rods fixed on the outside of the sliding ring, and the four connecting rods extend and are fixedly connected to the top ends of the corresponding four vertical rods 311; The sample transfer port 12 includes four limiting grooves adapted to the four vertical rods 311 and a rectangular groove adapted to the placement plate 32. The limiting grooves cooperate with the four vertical rods 311 to prevent the placement plate 32 from deflecting.

[0031] In this embodiment, the thickness of the placement plate 32 is greater than the wall thickness of the protection box 1, and the rotating mechanism includes extension strips 41 symmetrically and vertically fixed at both ends of the placement plate 32 close to the rotation axis 321, and an elastic resistance component 42 installed on the back of the protection box 1, the height of the elastic resistance component 42 is higher than the top surface of the resistance platform 33, the extension strip 41 is inside the detection cavity 11, and the end of the extension strip 41 away from the protection plate is provided with a downward first inclined surface 411, and the elastic resistance component 42 includes a fixed on the protection box 1 A strip-shaped outer shell 421 on the back outer wall, a resistance strip 422 slidably arranged in the strip-shaped outer shell 421, and a first return spring 423 arranged on the side of the resistance strip 422 away from the protection box 1, the resistance strip 422 is slidably arranged in a direction perpendicular to the back of the protection box 1, and the side of the resistance strip 422 close to the protection box 1 passes through the back of the protection box 1 and extends into the detection cavity 11, and the side of the resistance strip 422 close to the protection box 1 is provided with a second upward inclined surface 4221, and the second inclined surface 4221 is adapted to the first inclined surface 411.

[0032] This embodiment is based on the above-mentioned setting. During the downward movement of the placement plate 32, the extension bar 41 can cooperate with the second inclined surface 4221 of the contact bar 422 through its first inclined surface 411, so that the contact bar 422 compresses the first reset spring 423 and moves into the shell, so that the placement plate 32 passes through the contact bar 422 in a horizontal posture. When the placement plate 32 moves upward during the reset process, since the top surface of the extension bar 41 and the bottom surface of the contact bar 422 are both horizontal surfaces, the contact bar 422 can be pressed on the extension bar 41, so that the placement plate 32 tilts and dumps the road surface cut sample on its top surface. This device does not need to install an electric drive component to drive the placement plate 32 to complete the rotation. Only by cooperating with the extension bar 41 and the elastic contact component 42, the rotation and unloading of the placement plate 32 during the reset process can be automatically performed.

[0033] In this embodiment, a preloaded torsion spring (not shown) is installed between the rotating shaft 321 and the first vertical bar. The preloaded elastic force of the preloaded torsion spring can make the protective plate tightly attached to the arc block 3221. The number of the elastic resistance components 42 is at least two, and at least two elastic resistance components 42 are distributed longitudinally.

[0034] In this embodiment based on the above-mentioned setting, the preloaded torsion spring provides a preloaded elastic force, which can prevent the placement plate 32 from tilting during the descent process on the one hand, and can quickly reset the placement plate 32 after it breaks away from the resistance strip 422 during the upward movement of the placement plate 32 on the other hand. The setting of at least two elastic resistance components 42 can make the placement plate 32 rotate at least twice during the upward movement, so as to make the placement plate 32 vibrate, thereby ensuring that the placement plate 32 can clear the pavement cut sample on its top surface.

[0035] In order to prevent the pavement cut sample from hitting the observation window 13 when being broken, causing scratches on the observation window 13, thereby affecting the operator's observation of the entire compression process, in this embodiment, the observation window 13 includes an opening provided on one side of the front of the protection box 1, a rectangular frame 131 provided at the opening and protruding outward, a protection component 132 installed in the rectangular frame 131, and a high-strength transparent plate 133 installed on the side of the rectangular frame 131 away from the protection box 1; The protection assembly 132 includes a plurality of flip plates 1321 vertically arranged in the rectangular frame 131, and a rotating shaft 1322 is fixed at both ends of the flip plates 1321. The end of the rotating shaft 1322 away from the flip plate 1321 passes through the rectangular block and is fixedly equipped with a gear 1323. The protection assembly 132 further includes racks 1324 symmetrically arranged on both sides of the rectangular frame 131 and meshing with corresponding gears 1323 , and a pair of racks 1324 are connected to the lower ends with a horizontal bar 1325 ; A T-shaped hole 331 is provided at the center of the abutment platform 33, a transverse groove 332 is provided horizontally below the T-shaped hole 331 and aligned with the T-shaped hole 331, and a slot 16 is provided on the front of the protection box 1 on one side of the transverse groove 332; The protective assembly 132 also includes a T-shaped block 1326 adapted in the T-shaped hole 331 and an L-shaped plate 1327 horizontally arranged in the transverse groove 332. The L-shaped plate 1327 is fixedly connected to the bottom end of the T-shaped block 1326. The height of the T-shaped block 1326 is greater than the depth of the T-shaped hole 331. A second return spring 1328 is arranged between the bottom of the L-shaped plate 1327 and the bottom of the transverse groove 332. The end of the L-shaped plate 1327 away from the T-shaped block 1326 passes through the slot 16 and is fixedly connected to the transverse bar 1325.

[0036] Based on the above-mentioned arrangement in this embodiment, initially, under the action of the second return spring 1328, the top surface of the T-block 1326 is in high contact with the top surface of the bar 422, and the rack 1324 is at the uppermost end of its sliding stroke. At this time, the flip plate 1321 is in a vertical state, and the upper and lower ends of several flip plates 1321 are in contact with each other on one side of the high-strength transparent plate 133 to form a completed "plate body". When the placement plate 32 contacts the top surface of the T-block 1326 during the descent process, during this process, due to the weight of the pavement cut block sample and the setting of the preload torsion spring, the placement plate 32 will not be lifted up and flipped, and the placement plate 32 will stop moving at this position until the pressure head assembly 22 contacts the pavement cut block sample (that is, the sleeve structure 34 is displaced upward on the pressure head assembly 22). As the hydraulic telescopic cylinder 23 continues to extend, the T-block 1326 can be squeezed by the placement plate 32 and move downward. When the T-block 1326 moves downward, the L-plate 1327 and the cross bar 1325 can drive the rack 1324 to move downward, and then the rack 1324 and the gear 1323 cooperate to make the several flip plates 1321 flip together. When the T-block 1326 is flush with the top surface of the abutment platform 33, the several flip plates 1321 are in a horizontal posture. At this time, the operator can observe the entire compression resistance process through the gap between the high-strength transparent plate 133 and the adjacent flip plates 1321. When the pavement cut block sample is broken, at this time, under the action of the second reset spring 1328, the T-block 1326 can move upward for a distance and push the placement plate 32 to move upward. During this process, the placement plate 32 vibrates, and the flip plate 1321 reverses from a horizontal state to an inclined state, which can prevent the broken pavement cut block sample from colliding with the high-strength transparent plate 133.

[0037] The present invention also provides a detection method based on the above-mentioned highway pavement compression resistance detection device, comprising the following steps: Step 1: Place the pavement cut sample on the placement plate 32, and adjust the position of the pavement cut sample so that the pavement cut sample moves to the center of the placement plate 32, start the hydraulic telescopic cylinder 23, and make the hydraulic telescopic cylinder 23 drive the pressure head assembly 22 to move vertically downward; Step 2: When the pressure value appears on the pressure detector, the operator observes the compression process from the observation window 13. When the road surface cut sample is broken, the hydraulic telescopic cylinder 23 stops working and drives the pressure head assembly 22 to reset; Step three: During the resetting process, the rotating mechanism drives the placement plate 32 to rotate to an inclined position and then quickly resets; Step 3: After the pressure head assembly 22 is reset, simply clean the surface of the placement plate 32 using a cleaning brush.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A road pavement compression performance detection device, characterized in that: It includes a protective box, a pressurizing mechanism and a sample placing mechanism; The protection box is hollow inside to form a detection cavity, a sample removal port is opened at the center of the top of the protection box, an observation window is provided on one side of the front of the protection box, a slag discharge port is provided on one side of the back of the protection box, and an inclined plate is installed inside the detection cavity to guide the sample residue toward the slag discharge port; The pressurizing mechanism comprises a gantry, a pressurizing head assembly, a pressure detector and a hydraulic telescopic cylinder. The gantry is fixedly mounted on the top of the protective box. The pressurizing head assembly is mounted on the gantry through the hydraulic telescopic cylinder in a manner that it can move in a vertical direction. The pressurizing assembly is located directly above the sample entry port. The pressure detector is disposed between the hydraulic telescopic cylinder and the pressurizing head and is used to detect the pressure value applied by the pressurizing head to the sample. The sample placement mechanism includes a movable frame arranged in the sample moving inlet, a placement plate horizontally assembled at the bottom end of the movable frame, and an interference table fixed at the bottom of the detection chamber, the top of the interference table passes through the inclined plate, the interference table is located directly below the placement plate, and the top surface of the interference table is adapted to the bottom surface of the placement plate, and a sleeve structure is fixed on the top end of the movable frame, the sleeve structure is slidably matched with the pressure head assembly and can slide on the pressure head assembly in a vertical direction.

2. The road pavement compression resistance detection device according to claim 1, characterized in that: The movable frame includes four vertical rods distributed in a rectangular shape, and the top ends of the four vertical rods are fixedly connected to the sleeve structure. Among the four vertical rods, two of them are close to the back side of the protection box and are the first vertical rods, and the other two are close to the front side of the protection box and are the second vertical rods; the placement plate is arranged between the bottom ends of the four vertical rods, and the side of the placement plate close to the first vertical rod is rotatably connected to a pair of first vertical rods through a rotating shaft, and the side of the placement plate close to the second vertical rod is overlapped on a pair of second vertical rods through an overlapping structure, and the placement plate is in a horizontal state. The highway pavement compression resistance performance testing device also includes a flipping mechanism for driving the placement plate to rotate around the central axis of the rotating shaft.

3. The road pavement compression resistance detection device according to claim 2, characterized in that: The overlapping structure includes an arc block fixed on opposite sides of a pair of second vertical rods, and an arc groove symmetrically arranged on both sides of the placement plate and corresponding to the two arc blocks, the bottom end of the arc groove passes through the placement plate, the top end of the arc groove does not pass through the placement plate, and the center of the arc block is on the central axis of the rotating shaft.

4. The road pavement compression resistance detection device according to claim 2, characterized in that: The pressure head assembly includes a pressure plate and a pressure column coaxially arranged on the top of the pressure plate, and the upper and lower ends of the outer wall of the pressure column are both provided with limit rings, and a sliding area is formed between the two limit rings; The sleeve structure includes a movable ring sleeved on the sliding area of ​​the pressurizing column and four connecting rods fixed on the outside of the sliding ring, and the four connecting rods extend and are fixedly connected to the top ends of the corresponding four vertical rods; The sample transfer port comprises four limiting grooves matched with the four vertical rods and a rectangular groove matched with the placement plate.

5. The road pavement compression resistance detection device according to claim 3, characterized in that: The thickness of the placement plate is greater than the wall thickness of the protection box. The rotating mechanism includes extension strips symmetrically and vertically fixed at both ends of the placement plate close to the rotating shaft, and an elastic interference component installed on the back of the protection box. The height of the elastic interference component is higher than the top surface of the interference platform. The extension strip is located inside the detection cavity, and a first downward inclined surface is provided at the end of the extension strip away from the protection plate. The elastic interference component includes a strip-shaped outer shell fixed on the outer wall of the back of the protection box, a interference strip slidably arranged in the strip outer shell, and a first return spring arranged on the side of the interference strip away from the protection box. The interference strip is slidably arranged in a direction perpendicular to the back of the protection box. The side of the interference strip close to the protection box passes through the back of the protection box and extends into the detection cavity. The side of the interference strip close to the protection box is provided with a second upward inclined surface, and the second inclined surface is adapted to the first inclined surface.

6. The road pavement compression resistance testing device according to claim 5, characterized in that: A preloaded torsion spring is installed between the rotating shaft and the first vertical bar. The preloaded elastic force of the preloaded torsion spring can make the protective plate close to the arc block. The number of the elastic resistance components is at least two, and at least two elastic resistance components are distributed longitudinally.

7. The road pavement compression resistance testing device according to claim 1, characterized in that: The observation window comprises an opening arranged on one side of the front face of the protection box, a rectangular frame arranged at the opening and protruding outward, a protection component installed in the rectangular frame, and a high-strength transparent plate installed on the side of the rectangular frame away from the protection box; The protection assembly includes a plurality of flip plates vertically arranged in the rectangular frame, both ends of the flip plates are fixed with a rotating shaft, and the end of the rotating shaft away from the flip plate passes through the rectangular block and is fixedly equipped with a gear; The protection assembly also includes racks symmetrically arranged on both sides of the rectangular frame and meshing with corresponding gears, and a pair of racks are connected to the lower ends with horizontal bars; A T-shaped hole is provided at the center of the abutment platform, a transverse groove is provided horizontally below the T-shaped hole and aligned with the T-shaped hole, and a slot is provided on the front of the protection box on one side of the transverse groove; The protective assembly also includes a T-shaped block adapted in the T-shaped hole and an L-shaped plate horizontally arranged in the transverse groove, the L-shaped plate is fixedly connected to the bottom end of the T-shaped block, the height of the T-shaped block is greater than the depth of the T-shaped hole, a second return spring is arranged between the bottom of the L-shaped plate and the bottom of the transverse groove, and one end of the L-shaped plate away from the T-shaped block passes through the slot hole and is fixedly connected to the transverse bar.

8. A method for detecting the compressive strength of a road surface based on the device for detecting the compressive strength of a road surface according to claim 2, characterized in that: The steps include: Step 1: Place the pavement cut sample on the placement plate, adjust the position of the pavement cut sample so that the pavement cut sample moves to the center of the placement plate, start the hydraulic telescopic cylinder, and drive the pressure head assembly to move vertically downward; Step 2: When the pressure value appears on the pressure detector, the operator observes the compression process from the observation window. When the pavement cut sample is broken, the hydraulic telescopic cylinder stops working and drives the pressure head assembly to reset; Step 3: During the resetting process, the rotating mechanism drives the placement plate to rotate to an inclined position and then quickly resets; Step 3: After the pressure head assembly is reset, simply clean the surface of the placement plate with a cleaning brush.

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