Sampling device for detecting compaction degree of highway base course

Abstract

The utility model discloses a highway base layer compactness detection sampling device, and belongs to the technical field of highway base layer detection. Comprising a machine body, a position adjusting supporting unit, a sampling driving module, a slotting sampler and a scraping sampler, pipe bases are fixed to the top and the bottom of the machine body in a right opposite mode, and transmission bearings are installed on the inner sides of the pipe bases; a rotating seat plate is fixed to the rear portion of the front side of the machine body in an opposite mode, a rotating column is fixed to the rotating seat plate, and a clamping opening is formed in the end, away from the machine body, of the rotating column. A gyroscope connected with the controller is also fixed on the machine body; the rotating column and the position adjusting supporting unit are movably installed. The sampling driving module comprises a T-shaped transmission assembly and two electromagnetic clutches which are fixed on the inner side of the machine body; the input ends of the two electromagnetic clutches are respectively fixed with an output shaft of the T-shaped transmission assembly; the highway base compaction degree detection sampling device disclosed by the utility model can be used for completely sampling a soil sample at a sampling point, and can be used for arranging a sampling hole site.

Description

Technical Field

[0001] The utility model specifically relates to a highway base compaction detection sampling device, belonging to the technical field of highway base detection. Background Art

[0002] Compactness is one of the indicators for testing the quality of highway subgrade. The compactness of the subgrade refers to the ratio of the dry density of the subgrade after compaction to the standard maximum dry density, expressed as a percentage. The compaction standard is based on the highway standard. When the compaction is greater than or equal to the specified value, the compaction of the road section can get the specified full score. The factors that affect the compaction include the nature of the soil, moisture content, thickness of the compacted soil, strength of the foundation or underlying layer, etc. When testing the compaction of the subgrade, the compaction of the subgrade is generally sampled and tested by the sand filling method. It is necessary to first drill holes on the surface of the subgrade to take samples. After the drilling is completed, sand needs to be filled into the drill hole. Therefore, it is necessary to ensure that the inside of the drill hole is The diameter and bottom surface are equal in height, otherwise the accuracy of the subsequent sand filling data cannot be guaranteed. When manual sampling is performed with a shovel, the above sampling requirements cannot be guaranteed, and three sampling points are required for one kilometer. Manual sampling is labor-intensive. Existing machine sampling, such as China Patent Authorization Announcement No.: CN222541435U, discloses a sampling mechanism for highway base compaction detection. By setting a cross plate, a stabilizing screw rod, a power structure, a support plate and a stabilizing structure, the stability of the sampling tube during use can be improved. However, the structure still cannot guarantee the smoothness of the inside of the drilling position and the equal height of the bottom surface; and the integrity of the soil sample collection at the sampling point cannot be guaranteed. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes a highway base compaction detection sampling device, which can completely sample the soil samples at the sampling points and can organize the sampling holes to ensure the sampling accuracy.

[0004] The utility model of a highway base compaction detection sampling device comprises:

[0005] The machine body has tube seats fixed on the top and bottom of the machine body, and transmission bearings are installed on the inner sides of the tube seats; a rotating seat plate is fixed on the front and rear sides of the machine body, and a rotating column is fixed on the rotating seat plate, and a card interface is provided on the end of the rotating column away from the machine body; a gyroscope connected to the controller is also fixed on the machine body;

[0006] A position adjustment support unit, wherein the rotating column and the position adjustment support unit are movably installed;

[0007] A sampling drive module, the sampling drive module comprises a T-shaped transmission assembly and two electromagnetic clutches fixed inside the body, the input ends of the two electromagnetic clutches are respectively fixed to an output shaft of the T-shaped transmission assembly; the input shaft of the T-shaped transmission assembly is fixed to the output shaft of the drive motor outside the body;

[0008] A slotted sampler, the slotted sampler comprises a drill tube, a sampling shaft is fixed to the rear end of the drill tube; the sampling shaft moves through a pipe seat and is connected to an output shaft of an electromagnetic clutch through a coupling;

[0009] A scraper sampler comprises a positioning cylinder, which is screwed to the outside of another tube seat; a scraper shaft is movable through the inner side of the positioning cylinder, and the top of the scraper shaft is connected to the output shaft of another electromagnetic clutch through a coupling; a scraper collector is fixed to the bottom of the scraper shaft.

[0010] When sampling the compaction degree of the highway base, first rotate the machine body along the positioning support unit so that the slotted sampler faces downward. After the positioning is completed, support the machine body through the positioning support unit. At this time, the gyroscope on the machine body detects the inclination of the machine body. When the controller determines that the slotted sampler faces downward, the controller gives the electromagnetic clutch signal corresponding to the slotted sampler, and the drive motor drives the T-shaped transmission assembly to rotate. The electromagnetic clutch driven by electromagnetic attraction drives the slotted sampler to rotate, and because the electromagnetic clutch corresponding to the scraper sampler is not engaged, the scraper sampler does not rotate when the drive motor rotates; at this time, only the slotted sampler performs the slotting action, and the slotting sampler The drill rotates and moves straight down through the adjustment support unit, so that the slotted sampler can sample the highway base sampling point; when sampling, the T-shaped transmission assembly drives the sampling shaft to rotate through the electromagnetic clutch, and the sampling shaft is guided by the transmission bearing in the pipe seat, so that the drill barrel rotates and drills to the set depth, and then the adjustment support unit is lifted, the drill barrel moves upward synchronously, and the drill core is brought out synchronously. Finally, the drill core is collected to complete the drilling sampling of the sampling point, and at the same time, the inner diameter of the drilling hole is kept consistent; then, the borehole is arranged to make the bottom surface of the borehole smooth and equal in height, and the remaining soil samples are collected to ensure that the soil samples are completely collected; the arrangement process is as follows:

[0011] First, the machine body is rotated along the positioning support unit to make the scraper sampler face downward. After the positioning is completed, the machine body is supported by the positioning support unit. At this time, the gyroscope on the machine body detects the inclination of the machine body. When the controller determines that the scraper sampler faces downward, the controller gives the electromagnetic clutch signal corresponding to the scraper sampler, and the drive motor drives the T-shaped transmission assembly to rotate. The electromagnetic clutch that is electromagnetically engaged drives the scraper sampler to rotate. Since the electromagnetic clutch corresponding to the slotted sampler is not engaged, the scraper sampler does not rotate when the drive motor rotates. At this time, the bottom surface of the hole is leveled by the scraper sampler, and the remaining soil samples are collected. After the two drill core soil samples and the remaining soil samples are collected, the soil sampling of the entire sampling point is completed.

[0012] Since the two output shafts of the T-shaped transmission assembly, the pipe seat, the central axes of the slotted sampler and the scraper sampler are on the same straight line, after the slotted sampler and the scraper sampler are rotated and replaced, the slotted sampler and the scraper sampler can be kept on the same straight line with the center point of the sampling position; therefore, it can be ensured that the sampling hole will not be damaged when the scraper sampler takes a second sample.

[0013] The cam is provided with a guide slot which is adapted to engage the locking cam of the guide seat and to engage with the locking cam at the bottom of the guide slot.

[0014] Furthermore, support feet are slidably provided at both ends of the outer side of the guide seat, and the support feet are fixed to the road base; the entire machine body is erected on the road base through the support feet, and the machine body can be driven to slide along the support feet, so that the slotted sampler and the scraper sampler enter the road base, and leave the road base after completing the sampling.

[0015] Furthermore, it also includes a linear lifting component fixed to the inspection vehicle, and a bracket is fixed to the lifting end of the linear lifting component; the guide seat is fixed to the top surface of the bracket; the linear lifting component can drive the bracket to slide linearly up and down, thereby driving the machine body to move up and down, enabling the slotting sampler and the scraper sampler to enter the highway base, and leave the highway base after completing the sampling.

[0016] Furthermore, the linear lifting assembly is a screw slide or a hydraulic lifting unit.

[0017] Furthermore, a hole seat is integrally formed at the lower part of the guide seat near the side of the support plate, and a locking pin is movably inserted into the inner side of the hole seat; a locking bolt is screwed onto the top of the hole seat and is tightened against the locking pin; when the machine body slides to the bottom along the locking groove, the locking pin is then inserted into the hole seat, and the locking bolt is tightened, thereby tightening the locking pin and limiting the machine body by the locking pin.

[0018] Furthermore, the T-shaped transmission assembly is a T-shaped spiral bevel gear steering gear or a T-shaped worm gear reducer.

[0019] Furthermore, handles are fixed on both sides of the machine body; the handles facilitate lifting the machine body and rotating and reversing the direction.

[0020] Furthermore, the scraper collector comprises one or more slope scraper plates fixed to the bottom of the scraper shaft, and the scraper shaft is provided with a supporting plate on the side of the slope scraper plate; the slope scraper plate is provided with a slot away from the scraper end, and lower spikes are fixed at both ends of the inner side of the slot, and an upper spike is fixed on the top surface of the slope scraper plate opposite to the lower spike; a limiting plate is fixed on the upper part of the upper spike; a collecting bag is sleeved in the slot; the inner side of the collecting bag is clamped to the lower spike and the upper spike; when in use, the collecting bag is first installed, During installation, rotate the positioning cylinder to expose the scraper collector to the bottom of the positioning cylinder. Then, clamp the collection bag into the slot and open the collection bag through the upper and lower spikes to complete the installation of the collection bag. When collecting soil samples, drive the slope scraper plate and the support plate to rotate through the scraper shaft. The slope scraper plate collects the soil sample with a floating shovel and sends the soil sample into the collection bag through the rotational force. After the collection bag completes collecting the soil sample, the collection bag is supported by the support plate. There is a height difference between the support plate and the bottom surface of the slope scraper plate; it will not affect the collection of soil samples.

[0021] Furthermore, an aggregate brush is fixed to the lower inner part of the positioning cylinder; when the scraper collector is scraping, the soil sample enters the slope scraper plate and is collected by the slope scraper plate. When the slope scraper plate contacts the aggregate brush, the soil sample passes through the obstruction of the aggregate brush and is collected into the collection bag. The slope scraper plate and the collection bag pass through the aggregate brush smoothly; completing the collection of a soil sample.

[0022] Compared with the prior art, the highway base compaction detection sampling device of the utility model performs full mechanical sampling of the sampling points, which can improve the sampling efficiency, and adopts the slotted sampler and the scraper sampler to perform two samplings on the sampling points, which can completely sample the soil samples at the sampling points and can organize the sampling holes to ensure the sampling accuracy; the slotted sampler and the scraper sampler can only rotate when they are facing downwards, and they will not rotate when facing upwards, thereby ensuring the safety of sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the detection and sampling device of the utility model without a support plate installed.

[0024] Figure 2 This is a schematic diagram of the structure of the sampling drive module of the utility model.

[0025] Figure 3 It is a schematic diagram of the internal structure of a local section of the positioning tube of the utility model.

[0026] Figure 4 For the utility model Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0027] Figure 5 It is a schematic diagram of the overall structure of the detection and sampling device of the utility model.

[0028] Figure 6 This is a schematic diagram of the detection sampling device and the support foot installation structure of the utility model.

[0029] Figure 7 For the utility model Figure 6 Schematic diagram of the local enlarged structure at point B in the middle.

[0030] Figure 8 It is a schematic diagram of the detection sampling device, linear lifting assembly and bracket installation structure of the utility model.

[0031] Figure numerals: 1, machine body, 2, tube seat, 3, rotating seat plate, 4, rotating column, 5, card interface, 6, gyroscope, 7, T-shaped transmission assembly, 8, electromagnetic clutch, 9, drive motor, 10, drill tube, 11, sampling axis, 12, positioning tube, 13, scraper axis, 14, support plate, 15, guide slide, 16, convex seat body, 17, adjustment hole, 18, locking groove, 19, embedment block, 20, support foot, 21, linear lifting assembly, 22, bracket, 23, hole seat, 24, locking pin, 25, locking bolt, 26, handle, 27, slope scraper plate, 28, bracket, 29, card slot, 30, lower spike, 31, upper spike, 32, aggregate brush. DETAILED DESCRIPTION

[0032] Example:

[0033] like Figures 1 to 8 The highway base compaction detection sampling device shown includes:

[0034] A machine body 1, wherein a tube seat 2 is fixed to the top and bottom of the machine body 1, and a transmission bearing is installed inside the tube seat 2; a rotating seat plate 3 is fixed to the rear of the front side of the machine body 1, and a rotating column 4 is fixed on the rotating seat plate 3, and a card interface 5 is provided at one end of the rotating column 4 away from the machine body 1; a gyroscope 6 connected to a controller is also fixed on the machine body 1;

[0035] A position adjustment support unit, wherein the rotating column 4 is movably mounted on the position adjustment support unit;

[0036] The sampling drive module includes a T-shaped transmission assembly 7 and two electromagnetic clutches 8 fixed to the inner side of the body 1, and the input ends of the two electromagnetic clutches 8 are respectively fixed to an output shaft of the T-shaped transmission assembly 7; the input shaft of the T-shaped transmission assembly 7 is fixed to the output shaft of the drive motor 9 outside the body 1;

[0037] A slotted sampler, the slotted sampler comprises a drill tube 10, a sampling shaft 11 is fixed to the rear end of the drill tube 10; the sampling shaft 11 moves through a pipe seat 2 and is connected to an output shaft of an electromagnetic clutch 8 through a coupling;

[0038] The scraper sampler includes a positioning cylinder 12, which is screwed to the outside of another tube seat 2; a scraper shaft 13 is movable through the inner side of the positioning cylinder 12, and the top of the scraper shaft 13 is connected to the output shaft of another electromagnetic clutch 8 through a coupling; a scraper collector is fixed to the bottom of the scraper shaft 13.

[0039] When sampling the compaction degree of the highway base, the machine body 1 is first rotated along the positioning support unit so that the slotted sampler faces downward. After the positioning is completed, the machine body 1 is supported by the positioning support unit. At this time, the gyroscope 6 on the machine body 1 detects the inclination of the machine body 1. When the controller determines that the slotted sampler faces downward, the controller sends a signal to the electromagnetic clutch 8 corresponding to the slotted sampler, and the drive motor 9 drives the T-shaped transmission assembly 7 to rotate. The electromagnetically engaged electromagnetic clutch 8 drives the slotted sampler to rotate, and because the electromagnetic clutch 8 corresponding to the scraper sampler is not engaged, the scraper sampler does not rotate when the drive motor 9 rotates; at this time, only the slotted sampler performs the slotting action, and the slotting sampler The device rotates and moves downward in a straight line through the positioning support unit, so that the slotted sampler samples the highway base sampling point; when sampling, the T-shaped transmission component 7 drives the sampling shaft 11 to rotate through the electromagnetic clutch 8, and the sampling shaft 11 is guided by the transmission bearing in the pipe seat 2, so that the drill tube 10 rotates and drills to the set depth, and then the positioning support unit is lifted, and the drill tube 10 moves upward synchronously, and the drill core is brought out synchronously. Finally, the drill core is collected to complete the drilling sampling of the sampling point, and at the same time, the inner diameter of the drilling hole is ensured to be consistent; then, the borehole is arranged to make the bottom surface of the borehole smooth and equal in height, and the remaining soil samples are collected to ensure that the soil samples are completely collected; the arrangement process is as follows:

[0040] First, rotate the machine body 1 along the positioning support unit to make the scraper sampler face downward. After the positioning is completed, support the machine body 1 through the positioning support unit. At this time, the gyroscope 6 on the machine body 1 detects the inclination of the machine body 1. When the controller determines that the scraper sampler faces downward, the controller sends a signal to the electromagnetic clutch 8 corresponding to the scraper sampler, and the drive motor 9 drives the T-shaped transmission assembly 7 to rotate. The electromagnetically engaged electromagnetic clutch 8 drives the scraper sampler to rotate, and because the electromagnetic clutch 8 corresponding to the slotted sampler is not engaged, the scraper sampler does not rotate when the drive motor 9 rotates; at this time, the bottom surface of the hole is leveled by the scraper sampler, and the remaining soil samples are collected. After the two drill core soil samples and the remaining soil samples are collected, the soil sampling of the entire sampling point is completed;

[0041] Since the two output shafts of the T-shaped transmission assembly 7, the pipe seat 2, the central axes of the slotted sampler and the scraper sampler are on the same straight line, after the slotted sampler and the scraper sampler are rotated and replaced, the slotted sampler and the scraper sampler can be kept on the same straight line with the center point of the sampling position; therefore, it can be ensured that the sampling hole will not be damaged during the secondary sampling of the scraper sampler.

[0042] The positioning support unit includes a support plate 14 and a guide seat. The rotating column 4 is movably installed with the upper part of the support plate 14 through a bearing; a guide slide 15 is provided on the support plate 14; the guide seat includes a convex seat body 16, and a positioning hole 17 for rotating with the card interface 5 is provided on the top of the convex seat body 16; a locking groove 18 for sliding installation with the card interface 5 is provided at the bottom of the rotating hole of the convex seat body 16; a convex insert 19 is slidably installed on the inner side of the guide slide 15, and the insert 19 passes through It is fixed to the bottom of the guide seat by bolts; when the machine body 1 needs to be reversed, the machine body 1 and the support plate 14 are moved upward synchronously. When the support plate 14 moves upward, the guide slide 15 of the support plate 14 slides up and down along the insert block 19. At the same time, the card interface 5 of the rotating column 4 slides to the adjustment hole 17 along the locking groove 18 of the guide seat. Then, the machine body 1 is rotated along the adjustment hole 17. After the rotation reversal is completed, the card interface 5 of the rotating column 4 slides downward along the locking groove 18 of the guide seat again; the support plate 14 slides down along the insert block 19 synchronously.

[0043] Support legs 20 are slidably provided at both ends of the guide seat, and the support legs 20 are fixed to the road base. The entire machine body 1 is erected on the road base through the support legs 20, and the machine body 1 can be driven to slide along the support legs 20, so that the slotted sampler and the scraper sampler enter the road base, and leave the road base after completing the sampling.

[0044] It also includes a linear lifting component 21 fixed to the inspection vehicle, and a bracket 22 is fixed to the lifting end of the linear lifting component 21; the guide seat is fixed to the top surface of the bracket 22; the linear lifting component 21 can drive the bracket 22 to slide up and down linearly, thereby driving the body 1 to move up and down, enabling the slotting sampler and the scraping sampler to enter the highway base, and leave the highway base after completing the sampling.

[0045] The linear lifting assembly 21 is a screw slide or a hydraulic lifting unit.

[0046] A hole seat 23 is integrally formed at the lower part of the guide seat near the side of the support plate 14, and a locking pin 24 is movably inserted into the inner side of the hole seat 23; a locking bolt 25 is screwed on the top of the hole seat 23 and is tightened with the locking pin 24; when the machine body 1 slides to the bottom along the locking groove 18, the locking pin 24 is then inserted into the hole seat 23, and the locking bolt 25 is tightened, so that the locking pin 24 is tightened, and the machine body 1 is limited by the locking pin 24.

[0047] The T-shaped transmission assembly 7 is a T-shaped spiral bevel gear steering gear or a T-shaped worm gear reducer.

[0048] Handles 26 are fixed on both sides of the machine body 1; the handles 26 facilitate lifting and rotating the machine body 1.

[0049] The scraper collector includes one or more slope scraper plates 27 fixed to the bottom of the scraper shaft 13, and the scraper shaft 13 is provided with a support plate 28 on the side of the slope scraper plate 27; the slope scraper plate 27 is provided with a slot 29 away from the scraper end, and lower spikes 30 are fixed at both ends of the inner side of the slot 29, and an upper spike 31 is fixed on the top surface of the slope scraper plate 27 facing the lower spike 30; a limiting plate is fixed on the upper part of the upper spike 31; a collection bag is sleeved in the slot 29; the inner side of the collection bag is clamped to the lower spike 30 and the upper spike 31; when in use, first install the collection bag Bag, when installing, rotate the positioning cylinder 12 to expose the scraper collector to the bottom of the positioning cylinder 12, then, clamp the collection bag into the card slot 29, and open the collection bag through the upper thorn nail 31 and the lower thorn nail 30 to complete the installation of the collection bag. When collecting soil samples, the slope scraper plate 27 and the support plate 28 are driven to rotate through the scraper shaft 13, the slope scraper plate 27 collects the soil sample floating shovel, and sends the soil sample into the collection bag through the rotation force. After the collection bag completes the soil sample collection, the collection bag is supported by the support plate 28, and the support plate 28 and the bottom surface of the slope scraper plate 27 are set with a height difference; it will not affect the collection of soil samples.

[0050] A collection brush 32 is fixed to the lower inner part of the positioning cylinder 12; when the scraper collector is scraping, the soil sample enters the slope scraper plate 27 and is collected by the slope scraper plate 27. When the slope scraper plate 27 contacts the collection brush 32, the soil sample passes through the obstruction of the collection brush 32 and is collected in the collection bag. The slope scraper plate 27 and the collection bag pass through the collection brush 32 smoothly; completing the collection of a soil sample.

[0051] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. A road base compaction detection sampling device, characterized in that: include: The machine body has tube seats fixed on the top and bottom of the machine body, and transmission bearings are installed on the inner sides of the tube seats; a rotating seat plate is fixed on the front and rear sides of the machine body, and a rotating column is fixed on the rotating seat plate, and a card interface is provided on the end of the rotating column away from the machine body; a gyroscope connected to the controller is also fixed on the machine body; A position adjustment support unit, wherein the rotating column and the position adjustment support unit are movably installed; A sampling drive module, the sampling drive module comprises a T-shaped transmission assembly and two electromagnetic clutches fixed inside the body, the input ends of the two electromagnetic clutches are respectively fixed to an output shaft of the T-shaped transmission assembly; the input shaft of the T-shaped transmission assembly is fixed to the output shaft of the drive motor outside the body; A slotted sampler, the slotted sampler comprises a drill tube, a sampling shaft is fixed to the rear end of the drill tube; the sampling shaft moves through a pipe seat and is connected to an output shaft of an electromagnetic clutch through a coupling; A scraper sampler comprises a positioning cylinder, which is screwed to the outside of another tube seat; a scraper shaft is movable through the inner side of the positioning cylinder, and the top of the scraper shaft is connected to the output shaft of another electromagnetic clutch through a coupling; a scraper collector is fixed to the bottom of the scraper shaft.

2. The highway base compaction detection sampling device according to claim 1 is characterized in that: The positioning support unit includes a back plate and a guide seat, the rotating column is movably installed with the upper part of the back plate through a bearing; a guide slide is provided on the back plate; the guide seat includes a convex seat body, a positioning hole for rotating with the card interface is provided on the top of the convex seat body; a locking groove for sliding installation with the card interface is provided at the bottom of the rotating hole of the convex seat body; a convex insert is slidably installed on the inner side of the guide slide, and the insert is fixed to the bottom of the guide seat by bolts.

3. The highway base compaction detection sampling device according to claim 2 is characterized in that: Support feet are slidably arranged at both ends of the guide seat, and the support feet are fixed to the road base.

4. The highway base compaction detection sampling device according to claim 2 is characterized in that: It also includes a linear lifting component fixed to the inspection vehicle, a lifting end of the linear lifting component is fixed with a bracket; the guide seat is fixed to the top surface of the bracket.

5. The highway base compaction detection sampling device according to claim 4 is characterized in that: The linear lifting component is a screw slide or a hydraulic lifting unit.

6. The highway base compaction detection sampling device according to claim 2 is characterized in that: A hole seat is integrally formed at the lower part of the guide seat near the side of the back plate, a lock pin is movably inserted into the inner side of the hole seat, and a lock bolt is screwed on the top of the hole seat and is tightly pressed against the lock pin.

7. The highway base compaction detection sampling device according to claim 1 is characterized in that: The T-shaped transmission assembly is a T-shaped spiral bevel gear steering gear or a T-shaped worm gear reducer.

8. The highway base compaction detection sampling device according to claim 1 is characterized in that: Handles are fixed on both sides of the machine body.

9. The highway base compaction detection sampling device according to claim 1, characterized in that: The scraper collector includes one or more slope scraper plates fixed to the bottom of the scraper shaft, and the scraper shaft is provided with a supporting plate on the side of the slope scraper plate; the slope scraper plate is provided with a slot away from the scraper end, lower spikes are fixed at both ends of the inner side of the slot, and an upper spike is fixed on the top surface of the slope scraper plate opposite to the lower spike; a limiting plate is fixed on the upper part of the upper spike; a collecting bag is sleeved in the slot; the inner side of the collecting bag is clamped to the lower spike and the upper spike.

10. The highway base compaction detection sampling device according to claim 1, characterized in that: A material collecting brush is fixed on the lower inner part of the positioning cylinder.

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