Highway subgrade compaction degree detection device

Abstract

The utility model provides a highway subgrade compaction degree detection device which comprises a detection frame, a sampling mechanism and an auxiliary disassembly and assembly mechanism, the sampling mechanism comprises a first driving assembly, a U-shaped plate, a cutting ring and two limiting assemblies which are oppositely arranged in the transverse direction, and the outer side of the cutting ring protrudes upwards to form two positioning plates; the positioning plate and the U-shaped plate are both provided with transverse through holes which are correspondingly formed, the auxiliary disassembling and assembling mechanism is movably arranged in the longitudinal direction, and the movement path of the auxiliary disassembling and assembling mechanism and the two limiting assemblies both have limiting intersection points. The first driving assembly drives the cutting ring to move up and down so as to sample roadbed soil by adopting a cutting ring method, and when the cutting ring needs to be dismounted, the auxiliary dismounting mechanism is driven to move in the transverse direction and is located at a limiting intersection point, and the auxiliary dismounting mechanism can extrude the two limiting assemblies to be separated from the transverse through hole of the positioning plate; the sampling efficiency of the cutting ring is improved, the workload of operators is reduced, and the use convenience and the working efficiency of the detection device are improved.

Description

Technical Field

[0001] This utility model relates to the field of roadbed testing technology, and in particular to a roadbed compaction testing device. Background Technology

[0002] The compaction degree of highway subgrade is one of the important indicators for measuring the quality of highway engineering. It is directly related to the stability and durability of the highway. Accurate detection of subgrade compaction degree plays a vital role in ensuring the quality of highway engineering and extending the service life of the highway. At present, among the methods for detecting the compaction degree of highway subgrade, the ring cutter method is a commonly used and relatively classic detection method. The ring cutter method involves cutting a certain volume of soil sample, measuring its density, and then calculating the compaction degree.

[0003] In traditional ring cutter testing devices, the ring cutter is usually connected to the ring cutter handle by a thread. The installation and disassembly process is time-consuming and inefficient in the large-scale testing of roadbed compaction. In addition, for the soil sample taken, the bottom of the soil sample needs to be trimmed to be flush with the bottom of the ring cutter to ensure the accuracy of the measurement. In terms of soil sample trimming, traditional devices often require operators to manually cut and trim the soil sample with a soil cutter, which is inefficient and cumbersome.

[0004] Therefore, it is necessary to propose a highway subgrade compaction testing device to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a highway subgrade compaction testing device to solve the problems of cumbersome installation and disassembly and low efficiency of the ring cutter in the existing subgrade compaction testing device.

[0006] To achieve the above objectives, this utility model provides a highway subgrade compaction testing device, including a testing frame, a sampling mechanism, and an auxiliary assembly / disassembly mechanism; wherein,

[0007] The sampling mechanism includes a first driving component, a U-shaped plate, a ring cutter, and two limiting components arranged laterally opposite each other. The first driving component is fixed below the top of the detection frame, and the driving end of the first driving component is vertically telescopically arranged. The U-shaped plate is connected to the driving end of the first driving component. Two positioning plates are formed by upward protrusion on the outer side of the ring cutter. The positioning plates and the U-shaped plate are provided with corresponding transverse through holes. The ring cutter passes through the transverse through holes through the limiting components to connect to the inner side of the U-shaped plate, and the limiting components are movably arranged laterally.

[0008] The auxiliary disassembly and assembly mechanism is movably arranged in the longitudinal direction, and the movement path of the auxiliary disassembly and assembly mechanism has a limiting intersection point with both of the limiting components;

[0009] When the auxiliary disassembly and assembly mechanism is located at the intersection of the limiting points, the auxiliary disassembly and assembly mechanism pushes the two limiting components to disengage from the transverse through hole of the positioning plate.

[0010] Preferably, the auxiliary disassembly and assembly mechanism includes a second drive assembly, a transmission assembly, and a pushing assembly, wherein the transmission assembly includes a threaded rod, a threaded sleeve, and a first connecting block; wherein,

[0011] The second drive assembly is connected to one side of the detection frame. One end of the threaded rod passes through the detection frame and is connected to the drive end of the second drive assembly. The other end of the threaded rod is rotatably connected to the inside of the detection frame. The threaded sleeve is fitted onto the threaded rod. The pushing assembly is connected to the threaded sleeve through the first connecting block. The movement path of the pushing assembly intersects with the two limiting assemblies at limiting points.

[0012] Preferably, each of the limiting components includes a limiting rod, a sliding cylinder, a vertical plate, a spring, and a first inclined block. The sliding cylinder is connected to the U-shaped plate and is correspondingly arranged with respect to the transverse through hole. The limiting rod passes through the sliding cylinder and the transverse through hole and is movably arranged in the transverse direction. The vertical plate is connected to the end of the limiting rod away from the ring cutter. The first inclined block is connected to the bottom end of the vertical plate, and the inclined surface of the first inclined block faces the pushing component. The spring is connected between the U-shaped plate and the vertical plate.

[0013] Preferably, the jacking assembly includes a horizontal plate and two jacking units arranged laterally opposite each other. Each jacking unit includes an L-shaped rod and a second inclined block. The horizontal plate is connected to the threaded sleeve through the first connecting block. The L-shaped rod is connected to the horizontal plate. The second inclined block is connected to the L-shaped rod. The inclined surface of the second inclined block faces the first inclined block. The movement path of each second inclined block intersects with a first inclined block at a limiting point.

[0014] Preferably, the jacking assembly further includes a cutting blade, and the side of the cross plate near the ring cutter is recessed inward to form a groove, and the cutting blade is connected in the groove.

[0015] Preferably, the device further includes a reinforcement component, which includes a reinforcement rod, a sliding sleeve, and a second connecting block. The reinforcement rod is connected to the inner side of the testing frame and is arranged parallel to the bottom of the threaded rod. The sliding sleeve is fitted onto the reinforcement rod, and the second connecting block is connected between the sliding sleeve and the threaded sleeve.

[0016] Preferably, the first drive component is a drive cylinder.

[0017] Preferably, the second drive component is a drive motor.

[0018] Preferably, it also includes a universal locking anti-slip wheel, which is connected to the bottom of the testing frame.

[0019] Preferably, the sampling mechanism further includes a T-shaped baffle, which is fixed below the top of the U-shaped plate, and the bottom end of the T-shaped baffle is used to abut against the ring cutter.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a roadbed compaction testing device, comprising a testing frame, a sampling mechanism, and an auxiliary disassembly and assembly mechanism. The sampling mechanism includes a first driving component, a U-shaped plate, a ring cutter, and two limiting components arranged laterally opposite each other. The first driving component is fixed below the top of the testing frame, and the driving end of the first driving component is vertically telescopically arranged. The U-shaped plate is connected to the driving end of the first driving component. Two positioning plates are formed by upward protrusion on the outer side of the ring cutter. The positioning plates and the U-shaped plate are each provided with corresponding transverse through holes. The ring cutter passes through the transverse through holes through the limiting components to connect to the inner side of the U-shaped plate, and the limiting components are movably arranged laterally. The auxiliary disassembly and assembly mechanism is movably arranged longitudinally, and the movement path of the auxiliary disassembly and assembly mechanism has a limiting intersection point with the two limiting components. Thus, the ring cutter is driven up and down by the first drive component to sample the roadbed soil using the ring cutter method. When the ring cutter needs to be removed, the auxiliary disassembly and assembly mechanism is driven to move laterally and when it is located at the intersection of the limit points, the auxiliary disassembly and assembly mechanism can squeeze the two limit components to disengage from the lateral through hole of the positioning plate, which improves the efficiency of ring cutter sampling, reduces the workload of operators, and improves the ease of use and work efficiency of the detection device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic elevation view of the overall structure in one embodiment of the present utility model;

[0024] Figure 2 This is a side view of the sampling mechanism in one embodiment of the present invention;

[0025] Figure 3 This is a plan view of the jacking component in one embodiment of the present invention.

[0026] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0027] Explanation of icon numbers:

[0028] 10. Sampling mechanism; 110. First drive assembly; 120. U-shaped plate; 121. Horizontal through hole; 130. Ring cutter; 131. Positioning plate; 140. Limiting assembly; 141. Limiting rod; 142. Sliding cylinder; 143. Vertical plate; 144. Spring; 145. First inclined block; 150. T-shaped baffle; 20. Auxiliary disassembly and assembly mechanism; 210. Second drive assembly; 220. Transmission assembly; 221. Threaded rod; 222. Threaded sleeve; 223. First connecting block; 230. Pushing assembly; 231. Horizontal plate; 232. L-shaped rod; 233. Second inclined block; 234. Soil cutter; 240. Reinforcing assembly; 241. Reinforcing rod; 242. Sliding sleeve; 243. Second connecting block; 30. Detection frame; 310. Universal locking anti-slip wheel. Detailed Implementation

[0029] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] Please see the appendix Figure 1-3 This utility model provides a highway subgrade compaction testing device in one embodiment, comprising a testing frame 30, a sampling mechanism 10, and an auxiliary disassembly and assembly mechanism 20. First, it should be noted that in this application, "longitudinal" refers to the extension direction of the threaded rod 221, and "transverse" refers to the horizontal direction perpendicular to the longitudinal direction, as shown in the accompanying drawings. Unlike existing technologies where the ring cutter 130 is typically connected to the ring cutter 130 handle via a thread, which is time-consuming to install and disassemble and inefficient in large-scale subgrade compaction testing, this application addresses these shortcomings by providing a highway subgrade compaction testing device, as detailed below:

[0034] The sampling mechanism 10 includes a first driving assembly 110, a U-shaped plate 120, a ring cutter 130, and two limiting assemblies 140 arranged laterally opposite each other. The first driving assembly 110 is fixed below the top of the detection frame 30, and the driving end of the first driving assembly 110 is vertically extendable. The U-shaped plate 120 is connected to the driving end of the first driving assembly 110. Two positioning plates 131 are formed by upward protrusion on the outer side of the ring cutter 130. Both the positioning plates 131 and the U-shaped plate 120 are provided with corresponding transverse through holes 12. 1. The ring cutter 130 passes through the transverse through hole 121 via the limiting component 140 to connect to the inner side of the U-shaped plate 120, and the limiting component 140 is movably arranged in the transverse direction; the auxiliary disassembly and assembly mechanism 20 is movably arranged in the longitudinal direction, and the movement path of the auxiliary disassembly and assembly mechanism 20 has a limiting intersection point with both limiting components 140; wherein, when the auxiliary disassembly and assembly mechanism 20 is located at the limiting intersection point, the auxiliary disassembly and assembly mechanism 20 pushes the two limiting components 140 to disengage from the transverse through hole 121 of the positioning plate 131.

[0035] Specifically, the highway subgrade compaction testing device in this application includes a testing frame 30, a sampling mechanism 10, and an auxiliary assembly / disassembly mechanism 20. The testing frame 30 is used for mounting various mechanisms to serve as the frame of the entire device. The sampling mechanism 10 is used to collect subgrade soil samples for testing the subgrade compaction. It includes a first driving component 110, a U-shaped plate 120, a ring cutter 130, and two limiting components 140 arranged laterally opposite to each other. Sampling is performed using the ring cutter 130 method. The first driving component 110 is used to drive the ring cutter 130. The ring cutter 130 moves vertically to facilitate cutting operations. Preferably, it can be driven by a cylinder, which has a large pushing force and is energy-efficient. The U-shaped plate 120 is used for mounting the ring cutter 130. The positioning plate 131 protruding from the outer side of the ring cutter 130 is used to connect with the U-shaped plate 120. The limiting component 140 limits the ring cutter 130 to be installed on the inner side of the U-shaped plate 120 by passing through the transverse through hole 121. When it is necessary to disassemble the ring cutter 130, it can be used in conjunction with the auxiliary disassembly and assembly component.

[0036] The auxiliary disassembly and assembly component is movably arranged longitudinally, and its movement path intersects with the two limiting components 140 at limiting points. Thus, when it is necessary to remove the ring cutter 130 to collect the sampled soil, the auxiliary disassembly and assembly component is driven to move longitudinally. When it moves to intersect with the limiting components 140 (i.e., at the limiting intersection point), the auxiliary disassembly and assembly component will squeeze the two limiting components 140 until the two limiting components 140 disengage from the transverse through hole 121 of the positioning plate 131. At this time, the ring cutter 130 is no longer limited and penetrated by the limiting components 140, and the ring cutter 130 can be removed. The whole process reduces the workload of the operator and improves the sampling efficiency of the ring cutter 130.

[0037] In a preferred embodiment of this utility model, the auxiliary disassembly and assembly mechanism 20 includes a second drive assembly 210, a transmission assembly 220, and a pushing assembly 230. The transmission assembly 220 includes a threaded rod 221, a threaded sleeve 222, and a first connecting block 223.

[0038] The second drive assembly 210 is connected to one side of the detection frame 30. One end of the threaded rod 221 passes through the detection frame 30 and is connected to the drive end of the second drive assembly 210. The other end of the threaded rod 221 is rotatably connected to the inside of the detection frame 30. The threaded sleeve 222 is sleeved on the threaded rod 221. The pushing assembly 230 is connected to the threaded sleeve 222 through the first connecting block 223. The movement path of the pushing assembly 230 has a limiting intersection point with both limiting assemblies 140.

[0039] It should be noted that the second drive assembly 210 drives the threaded rod 221 to rotate, thereby driving the push assembly 230 connected to the threaded rod 221 to move longitudinally, similar to the principle of a lead screw (converting rotational motion into linear motion). Therefore, one end of the threaded rod 221 needs to be connected to the drive end of the second drive assembly 210. A coupling can be used to ensure a stable connection and reduce deviation. The other end is rotatably connected to the inside of the detection frame 30. Here, a structure with a bearing seat can be used. Meanwhile, the second drive assembly 210 can be driven by a drive motor to achieve rotation. The threaded sleeve 222 is used to be fitted onto the threaded rod 221 to achieve linear movement with the rotation of the threaded rod 221. The first connecting block 223 is used to connect the push assembly 230 and the threaded sleeve 222. During assisted assembly and disassembly, the two limiting components 140 of the push assembly 230 intersect and press.

[0040] In a preferred embodiment of this utility model, each limiting component 140 includes a limiting rod 141, a sliding cylinder 142, a vertical plate 143, a spring 144, and a first inclined block 145. The sliding cylinder 142 is connected to the U-shaped plate 120, and the sliding cylinder 142 is correspondingly arranged with the transverse through hole 121. The limiting rod 141 passes through the sliding cylinder 142 and the transverse through hole 121 and is movably arranged in the transverse direction. The vertical plate 143 is connected to the end of the limiting rod 141 away from the ring cutter 130. The first inclined block 145 is connected to the bottom end of the vertical plate 143, and the inclined surface of the first inclined block 145 is arranged facing the pushing component 230. The spring 144 is connected between the U-shaped plate 120 and the vertical plate 143.

[0041] It should be noted that the limiting rod 141 is used to pass through the transverse through hole 121 to limit the connection of the ring cutter 130. The sliding cylinder 142 can play a sliding guide role after the limiting rod 141 passes through. It is set with the same hole diameter and coaxial center line as the transverse through hole 121. The connection between the sliding cylinder 142 and the U-shaped plate 120 can also enhance the connection stability of the limiting rod 141. The vertical plate 143 is used for the installation of the first inclined block 145. The first inclined block 145 is the main force-bearing component when the pushing assembly 230 pushes. Its inclined surface needs to be set towards the pushing assembly 230 so as to facilitate the pushing of the pushing assembly 230. The spring 144 can facilitate the ring cutter 130 to reset itself through elasticity after replacement, so as to improve the connection stability of the ring cutter 130 during installation.

[0042] In a preferred embodiment of the present invention, the jacking assembly 230 includes a horizontal plate 231 and two jacking units arranged laterally opposite each other. Each jacking unit includes an L-shaped rod 232 and a second inclined block 233. The horizontal plate 231 is connected to the threaded sleeve 222 through the first connecting block 223. The L-shaped rod 232 is connected to the horizontal plate 231. The second inclined block 233 is connected to the L-shaped rod 232. The inclined surface of the second inclined block 233 is arranged facing the first inclined block 145, and the movement path of each second inclined block 233 has a limiting intersection point with a first inclined block 145.

[0043] It is worth noting that the horizontal plate 231 is used for mounting the pushing unit. The two pushing units are arranged laterally opposite each other to correspond to the two limiting components 140 respectively. Each pushing unit includes an L-shaped rod 232 and a second inclined block 233. The L-shaped rod 232 is used to support the second inclined block 233 to a certain height so that the second inclined block 233 and the first inclined block 145 are located on the same longitudinal extension line. The L-shaped rod 232 can also use its bending characteristics to make the second inclined block 233 closer to the first inclined block 145. In order to facilitate pushing, the inclined surface of the second inclined block 233 also needs to be set towards the first inclined block 145. In this way, when the second component drives the threaded rod 221 to rotate and drives the horizontal plate 231 to move, the two second inclined blocks 233 can push the two first inclined blocks 145 simultaneously.

[0044] In a preferred embodiment of the present invention, the jacking assembly 230 further includes a soil cutting blade 234. The side of the horizontal plate 231 near the ring cutter 130 is recessed inward to form a groove, and the soil cutting blade 234 is connected in the groove.

[0045] It is worth noting that the cutting blade 234 can automatically align the bottom of the soil sample with the bottom of the ring cutter 130 during the movement of the horizontal plate 231, thereby simultaneously improving the efficiency of soil sample trimming before the ring cutter 130 is removed.

[0046] Furthermore, it also includes a reinforcement component 240, which includes a reinforcement rod 241, a sliding sleeve 242, and a second connecting block 243. The reinforcement rod 241 is connected to the inner side of the detection frame 30 and is arranged parallel to the lower part of the threaded rod 221. The sliding sleeve 242 is sleeved on the reinforcement rod 241. The second connecting block 243 is connected between the sliding sleeve 242 and the threaded sleeve 222.

[0047] It should be noted that, considering that the entire pushing assembly 230 is connected to the threaded sleeve 222, the reinforcing assembly 240 is provided to improve the stability of the threaded sleeve 222 during movement. It includes a reinforcing rod 241, a sliding sleeve 242, and a second connecting block 243. The reinforcing rod 241 is connected to the top of the detection frame 30 to serve as a slide rail, and the sliding sleeve 242 is sleeved on the reinforcing rod 241 and connected to the threaded sleeve 222 through the second connecting block 243, thereby connecting the entire threaded sleeve 222 and the entire reinforcing assembly 240 into one unit to improve the overall integrity and enhance the stability of the pushing assembly 230 during movement.

[0048] Furthermore, it also includes a universal locking anti-slip wheel 310, which is connected to the bottom of the detection frame 30.

[0049] It should be noted that the universal locking pulley 310 facilitates the movement of the entire device, improving its mobility, while the locking device on the pulley ensures the stability of the entire device during sampling.

[0050] Furthermore, the sampling mechanism 10 also includes a T-shaped baffle 150, which is fixed below the top end of the U-shaped plate 120, and the bottom end of the T-shaped baffle 150 is used to abut against the ring cutter 130.

[0051] It is understood that the T-shaped baffle 150 serves as a positioning stop for the ring cutter 130 during installation, so that the ring cutter 130 can be supported against the bottom end of the T-shaped baffle 150, making positioning more convenient when installing the ring cutter 130.

[0052] To facilitate understanding by those skilled in the art, the operating procedure is briefly described as follows:

[0053] During operation, the operator activates the first drive assembly 110 (drive cylinder), which, via the U-shaped plate 120, moves the limit rod 141 and the ring cutter 130 downwards. As the ring cutter 130 descends, it gradually cuts into the subgrade soil until the predetermined sampling depth is reached, completing the sampling. The operator then activates the first drive assembly 110 (drive cylinder) again, which, via the U-shaped plate 120, moves the ring cutter 130 upwards, returning it to its initial position. Finally, the operator activates the second drive assembly 210 (drive motor), which drives the screw... The threaded rod 221 rotates, causing the horizontal plate 231 to move longitudinally toward the ring cutter 130. As the horizontal plate 231 moves, the cutting blade 234 gradually approaches the bottom of the soil sample. When the cutting blade 234 contacts the bottom of the soil sample, the continuing movement of the horizontal plate 231 causes the cutting blade 234 to cut off the excess portion at the bottom of the soil sample, making the bottom of the soil sample flush with the bottom of the ring cutter 130, thus completing the soil sample trimming work. Meanwhile, the first inclined block 145 also moves with the horizontal plate 231. When the first inclined block 145 moves to contact the second inclined block 233 and compresses it, the second inclined block 233, through the vertical plate 143, drives the limiting rod 141 to overcome the spring 14. The elastic movement of 4 causes the limiting rod 141 to disengage from the transverse through hole 121 of the positioning plate 131, releasing the fixing restriction on the ring cutter 130. After the restriction is released, the ring cutter 130, after sampling, is now on the horizontal plate 231. When the horizontal plate 231 moves to the designated position, the staff can remove the ring cutter 130 after sampling for subsequent soil sample weighing, moisture content determination, and other related testing work. After the ring cutter 130 is removed, the second drive assembly 210 (drive motor) is activated to reverse it. The second drive assembly 210 (drive motor) drives the threaded rod 221 to rotate in the opposite direction, and the horizontal plate 231 rotates on the threaded rod. Driven by rod 221, it moves in the opposite direction and returns to its initial position. During this process, the first inclined block 145 and the second inclined block 233 disengage. At the same time, the vertical plate 143 pulls the limiting rod 141, placing the new ring cutter 130 in the designated position within the U-shaped plate 120. At this time, the T-shaped baffle 150 is tightly fitted with the ring cutter 130. The vertical plate 143 is released, and under the elastic force of the spring 144, the limiting rod 141 is inserted into the transverse through hole 121 of the positioning plate 131, thereby fixing the new ring cutter 130 within the U-shaped plate 120, completing the installation preparation work for the new ring cutter 130, and preparing for the next inspection work.

[0054] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A highway subgrade compactness detection device, characterized in that, Including detection frame, sampling mechanism and auxiliary dismounting mechanism, wherein, The sampling mechanism includes first driving assembly, U-shaped plate, ring cutter and two laterally opposite limiting assemblies, the first driving assembly is fixed below the top end of the detection frame, and the driving end of the first driving assembly is vertically telescopically arranged, the U-shaped plate is connected with the driving end of the first driving assembly, the outer side of the ring cutter is upwardly protruded to form two positioning plates, the positioning plates and the U-shaped plate are both provided with corresponding lateral through holes, the ring cutter penetrates through the lateral through holes through the limiting assemblies to be connected to the inner side of the U-shaped plate, and the limiting assemblies are movably arranged laterally. The auxiliary dismounting mechanism is longitudinally movably arranged, and the movement path of the auxiliary dismounting mechanism has a limiting intersection point with the two limiting assemblies. When the auxiliary dismounting mechanism is located at the limiting intersection point, the auxiliary dismounting mechanism pushes the two limiting assemblies to separate from the lateral through holes of the positioning plates.

2. The highway sub-grade compactness detection device according to claim 1, wherein The auxiliary dismounting mechanism includes second driving assembly, transmission assembly and pushing assembly, the transmission assembly includes threaded rod, threaded sleeve and first connecting block, wherein, The second driving assembly is connected to one side of the detection frame, one end of the threaded rod penetrates through the detection frame and is connected with the driving end of the second driving assembly, the other end of the threaded rod is rotationally connected to the inner side of the detection frame, the threaded sleeve is sleeved on the threaded rod, the pushing assembly is connected to the threaded sleeve through the first connecting block, and the movement path of the pushing assembly has a limiting intersection point with the two limiting assemblies.

3. The highway sub-grade compactness detection device according to claim 2, wherein Each limiting assembly includes limiting rod, slide cylinder, vertical plate, spring and first inclined block, the slide cylinder is connected with the U-shaped plate, and the slide cylinder is correspondingly arranged with the lateral through hole, the limiting rod penetrates through the slide cylinder and the lateral through hole and is movably arranged laterally, the vertical plate is connected to one end of the limiting rod away from the ring cutter, the first inclined block is connected to the bottom end of the vertical plate, and the inclined surface of the first inclined block is arranged towards the pushing assembly, and the spring is connected between the U-shaped plate and the vertical plate.

4. The highway sub-grade compactness detection device according to claim 3, wherein The pushing assembly includes horizontal plate and two laterally opposite pushing units, each pushing unit includes L-shaped rod and second inclined block, the horizontal plate is connected to the threaded sleeve through the first connecting block, the L-shaped rod is connected to the horizontal plate, the second inclined block is connected to the L-shaped rod, the inclined surface of the second inclined block is arranged towards the first inclined block, and the movement path of each second inclined block has a limiting intersection point with one first inclined block.

5. The highway sub-grade compactness detection device according to claim 4, wherein The pushing assembly further includes soil cutting knife, one side of the horizontal plate close to the ring cutter is recessed to form a groove, and the soil cutting knife is connected in the groove.

6. The highway sub-grade compactness detection device according to claim 2, wherein The reinforcing assembly comprises a reinforcing rod, a sliding sleeve and a second connecting block, the reinforcing rod is connected to the inner side of the detection frame and is arranged in parallel below the threaded rod, the sliding sleeve is sleeved on the reinforcing rod, and the second connecting block is connected between the sliding sleeve and the threaded sleeve.

7. The highway sub-grade compactness detection device according to claim 1, wherein The first driving assembly adopts a driving cylinder.

8. The highway sub-grade compactness detection device according to claim 2, wherein The second driving assembly adopts a driving motor.

9. The highway sub-grade compactness detection device according to claim 1, wherein The universal locking pulley is connected to the bottom of the detection frame.

10. The highway sub-grade compactness detection device according to claim 1, wherein The sampling mechanism further comprises a T-shaped baffle, the T-shaped baffle is fixed below the top end of the U-shaped plate, and the bottom end of the T-shaped baffle is arranged in abutment with the annular cutter.

Images