CN219511823U - Rock and soil sampling device for geotechnical engineering - Google Patents
Rock and soil sampling device for geotechnical engineering Download PDFInfo
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- CN219511823U CN219511823U CN202222727240.4U CN202222727240U CN219511823U CN 219511823 U CN219511823 U CN 219511823U CN 202222727240 U CN202222727240 U CN 202222727240U CN 219511823 U CN219511823 U CN 219511823U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A90/30—Assessment of water resources
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Abstract
The utility model relates to the technical field of geotechnical engineering, in particular to a geotechnical sampling device for geotechnical engineering, which comprises: the bottom plate, both sides of the upper surface of the bottom plate are fixedly connected with support columns; the top plate is fixedly arranged at the top of the support column; the lifting mechanism is arranged on the top plate; the sampling mechanism is arranged at the lower side of the lifting mechanism; the ground inserting mechanism is arranged inside the support column; according to the utility model, through the arranged earth boring motor and the sampling tube, automatic sampling can be realized, meanwhile, sampling points with different depths can be sampled, comparison of detection results of the sampling points with different depths can be carried out, and the accuracy of the detection results is improved.
Description
Technical Field
The utility model relates to the technical field of geotechnical engineering, in particular to a geotechnical sampling device for geotechnical engineering.
Background
Rock and soil are collectively called any rock and soil composing the crust from the engineering construction point of view, the rock and soil can be subdivided into five main categories of hard rock, sub-hard soft rock, soft connection, loose connection and special components, structures, states and properties, the rock and soil engineering is a new technical system established in civil engineering practice, the rock and soil engineering is a tool for analyzing soil samples of construction strata before various engineering constructions, the problems of rock and soil engineering including foundation and foundation, side slope and underground engineering are solved, the rock and soil sampling device is used as a self research object for extracting the original soil of lower layer test soil as a sample for knowing the basic layer properties. And the sampling device chamber is used for detecting the soil sampling. The utility model discloses a rock sampling device for geotechnical engineering, which comprises a fixed frame, wherein two sides of the top of an inner cavity of the fixed frame are fixedly connected with air cylinders, the bottoms of the air cylinders are fixedly connected with movable plates, the bottoms of the movable plates are fixedly connected with motors, output shafts of the motors are fixedly connected with rotating rods, the bottoms of the rotating rods are movably connected with connecting blocks, the bottoms of the connecting blocks are fixedly connected with sampling hoppers, two sides of the connecting blocks are fixedly connected with fixed cylinders, the inner cavities of the fixed cylinders are fixedly connected with threaded sleeves, the inner cavities of the threaded sleeves are in threaded connection with threaded rods, and one ends of the threaded rods are movably connected with clamping blocks through bearings. According to the utility model, the rock sampling device is stably supported through the fixing frame, the rock is conveniently sampled through the coordination of the motor, the rotating rod, the connecting block and the sampling bucket, the motor, the rotating rod, the connecting block and the sampling bucket are conveniently driven through the coordination of the air cylinder and the movable plate to regulate the sampling depth, the rotating rod and the connecting block are conveniently detached through the coordination of the fixed cylinder, the threaded sleeve, the threaded rod and the clamping block, so that the sampling bucket is conveniently detached and replaced, the problem that the conventional rock sampling device is inconvenient to detach and replace due to the fact that the conventional rock sampling device is fixed by adopting a welding method is solved, the quality of sampling of the rock is reduced, and the service life of the sampling device is shortened.
Disclosure of Invention
The utility model aims to provide a geotechnical sampling device for geotechnical engineering, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: a geotechnical sampling device for geotechnical engineering, comprising:
the bottom plate, both sides of the upper surface of the bottom plate are fixedly connected with support columns;
the top plate is fixedly arranged at the top of the support column;
the lifting mechanism is arranged on the top plate;
the sampling mechanism is arranged at the lower side of the lifting mechanism;
the ground inserting mechanism is arranged inside the support column.
As a preferred embodiment of the present utility model, the lifting mechanism includes:
the two cylinders are fixedly arranged on two sides of the upper surface of the top plate, and the lower ends of the cylinders penetrate through the top plate;
the sampling mechanism mounting plate is fixedly arranged at the lower end of the air cylinder;
the infrared range finder is fixedly arranged on the upper surface of the top plate.
As a preferred embodiment of the present utility model, the sampling mechanism includes:
the motor shell is fixedly arranged on the upper surface of the sampling mechanism mounting plate;
the rotating motor is fixedly arranged inside the motor shell;
one end of the connecting shaft is fixedly connected with the output end of the rotating motor;
the sampling tube is fixedly arranged at the lower end of the connecting shaft.
As a preferred embodiment of the present utility model, the sampling mechanism includes:
the sampling chamber is arranged at the top of the inside of the sampling tube;
the fixed plate is fixedly arranged in the sampling tube;
the second electric push rods are fixedly arranged on the surfaces of two sides of the fixed plate at equal intervals;
the sampling cup is fixedly connected to one end of the second electric push rod;
sampling ports are formed in the wall of the two sides of the sampling chamber at equal intervals, and the sampling ports are arranged corresponding to the sampling cups;
the third electric push rod is fixedly arranged on one side surface of the inner part of the sampling cup;
the sample discharging plate is fixedly connected to one end of the third electric push rod;
the second electric push rod is started, the sampling cup is further led to enter the soil through the sampling port, the rotary motor is started to rotate again, the rotary motor is rotated to further drive the connecting shaft to rotate, the connecting shaft is rotated to further drive the sampling tube to rotate, the sampling cup is further driven to rotate, the soil is further rotationally twisted into the sampling cup, the second electric push rod is started to retract the sampling cup, the sampling tube is lifted out again, the third electric push rod is started to further drive the sample plate to push out and collect the soil, the depth of the sampling point is measured by the infrared range finder, and sampling of different depths can be carried out.
As a preferred embodiment of the present utility model, the sampling mechanism includes:
the drilling machine installation cavity is arranged at the lower side of the sampling chamber;
the earth boring motor is fixedly arranged in the earth boring motor installation cavity;
one end of the rotating shaft is fixedly connected with the output end of the drilling and grounding machine, and the rotating shaft penetrates through the bottom cavity wall of the installation cavity of the drilling and grounding machine;
the drilling machine installation cavity is fixedly arranged at one end of the rotating shaft;
the drilling machine is started to rotate, the rotation of the drilling machine further drives the rotation shaft to rotate, the rotation of the rotation shaft further drives the drill bit to rotate, meanwhile, the air cylinder is started, the sampling mechanism mounting plate is further driven to move downwards, the sampling tube is further driven to move downwards, and the sampling tube is further driven to enter soil through the through groove and the drill bit.
As a preferred embodiment of the present utility model, the ground inserting mechanism includes:
the lifting groove is formed in the support column;
the first electric push rod is fixedly arranged on the wall of the top part in the lifting groove;
the motor mounting plate is fixedly mounted at the lower end of the first electric push rod;
the ground inserting motor is fixedly arranged on the lower surface of the motor mounting plate;
the ground inserting screw rod is fixedly connected with the input end of the ground inserting motor.
As a preferred embodiment of the present utility model, the base plate includes:
the through groove is formed in the bottom plate and is correspondingly arranged with the sampling tube;
the through holes are formed in two sides of the bottom plate and are arranged corresponding to the ground inserting screw rods;
the roller is arranged on the lower surface of the bottom plate;
the whole device is moved to a sampling point through the roller, the earth inserting motor is started to rotate, the earth inserting motor is further driven to rotate by the earth inserting screw rod, the first electric push rod is further started to further drive the motor mounting plate to move downwards in the lifting groove, the earth inserting screw rod is further driven to be inserted into soil through the through hole, and the device is further fixed.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the utility model, the ground drilling motor and the sampling tube are arranged, the ground drilling motor is started to rotate, the rotating shaft is further driven to rotate by the rotation of the ground drilling motor, the drill bit is further driven to rotate by the rotation of the rotating shaft, the cylinder is started at the same time, the sampling mechanism mounting plate is further driven to move downwards, the sampling tube is further driven to enter soil through the through groove and the drill bit, the second electric push rod is started, the sampling cup is further driven to enter the soil through the sampling port, the rotating motor is started to rotate, the connecting shaft is further driven to rotate by the rotation of the connecting shaft, the sampling tube is further driven to rotate, the sampling cup is further driven to rotate, the soil is further twisted into the sampling cup, the second electric push rod is started to retract the sampling cup, the sampling tube is started to further drive the sample plate to push out and collect the soil, the depth of sampling points can be measured by the infrared range finder, sampling of different depths can be carried out, automatic sampling can be realized, meanwhile, the sampling points of different depths can be sampled, the comparison of the sampling points can be measured, and the accuracy of the detection results can be improved.
2. According to the utility model, the whole device is moved to the sampling point through the roller by the aid of the ground inserting motor and the ground inserting screw rod, the ground inserting motor is started to rotate, the ground inserting screw rod is further driven to rotate by the rotation of the ground inserting motor, the first electric push rod is further started to further drive the motor mounting plate to move downwards in the lifting groove, the ground inserting screw rod is further driven to be inserted into soil through the through hole, the device is further fixed, and the device can be fixed quickly, conveniently and quickly.
Drawings
FIG. 1 is a schematic overall perspective view of the present utility model;
FIG. 2 is a schematic diagram of a front cross-sectional structure of the present utility model;
FIG. 3 is a schematic view of structure A of the present utility model;
fig. 4 is a schematic cross-sectional view of the present utility model.
In the figure: 1. a bottom plate; 2. a top plate; 3. a lifting mechanism; 4. a support column; 5. a sampling mechanism; 6. a ground inserting mechanism; 7. a sampling port; 8. a through groove; 9. a drill bit; 10. a sampling tube; 11. a roller; 12. a sampling mechanism mounting plate; 13. an infrared range finder; 14. a motor housing; 15. a cylinder; 16. a controller; 17. a rotating electric machine; 18. a connecting shaft; 19. a rotation shaft; 20. an earth boring motor; 21. a drilling machine installation cavity; 22. a through hole; 23. a ground inserting screw rod; 24. a motor mounting plate; 25. a ground inserting motor; 26. a lifting groove; 27. a first electrical push rod; 28. a sampling chamber; 29. a second electric push rod; 30. a fixing plate; 31. a sampling cup; 32. a third electric push rod; 33. and (5) outputting a template.
Detailed Description
In order to facilitate understanding of the technical means, objects and effects of the present utility model, embodiments of the present utility model will be described in detail with reference to the accompanying drawings.
It is to be noted that all terms used for directional and positional indication in the present utility model, such as: "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "top", "low", "lateral", "longitudinal", "center", etc. are merely used to explain the relative positional relationship, connection, etc. between the components in a particular state (as shown in the drawings), and are merely for convenience of description of the present utility model, and do not require that the present utility model must be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model. Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Referring to fig. 1-4, the present utility model provides a technical solution:
a geotechnical sampling device for geotechnical engineering, comprising:
the bottom plate 1, two sides of the upper surface of the bottom plate 1 are fixedly connected with support columns 4;
the top plate 2, the top plate 2 is fixedly arranged at the top of the support column 4;
the lifting mechanism 3 is arranged on the top plate 2;
the sampling mechanism 5 is arranged at the lower side of the lifting mechanism 3;
the ground inserting mechanism 6, the ground inserting mechanism 6 is installed inside the support column 4.
As an example of the present utility model, the elevating mechanism 3 includes:
the two cylinders 15 are arranged, the two cylinders 15 are fixedly arranged on two sides of the upper surface of the top plate 2, and the lower ends of the cylinders 15 penetrate through the top plate 2;
the sampling mechanism mounting plate 12, the sampling mechanism mounting plate 12 is fixedly arranged at the lower end of the air cylinder 15;
and the infrared distance meter 13, wherein the infrared distance meter 13 is fixedly arranged on the upper surface of the top plate 2.
As an example of the present utility model, the sampling mechanism 5 includes:
the motor housing 14, the motor housing 14 is fixedly installed on the upper surface of the sampling mechanism mounting plate 12;
a rotating motor 17, the rotating motor 17 being fixedly installed inside the motor housing 14;
the connecting shaft 18, one end of the connecting shaft 18 is fixedly connected with the output end of the rotating motor 17;
the sampling tube 10, the sampling tube 10 is fixedly arranged at the lower end of the connecting shaft 18.
As an example of the present utility model, the sampling mechanism 5 includes:
a sampling chamber 28, the sampling chamber 28 being disposed at the top of the interior of the cartridge 10;
the fixed plate 30, the fixed plate 30 is fixedly installed in the sampling tube 10;
the second electric push rods 29 are fixedly arranged on the surfaces of the two sides of the fixed plate 30 at equal intervals;
the sampling cup 31, the sampling cup 31 is fixedly connected to one end of the second electric push rod 29;
sampling ports 7, wherein the sampling ports 7 are equidistantly arranged on the wall of the two sides of the sampling chamber 28, and the sampling ports 7 are correspondingly arranged with the sampling cup 31;
the third electric push rod 32, the third electric push rod 32 is fixedly installed on one side surface of the inner part of the sampling cup 31;
the sample outlet plate 33, wherein the sample outlet plate 33 is fixedly connected with one end of the third electric push rod 32;
the second electric push rod 29 is started, the sampling cup 31 is further led into soil through the sampling port 7, the rotating motor 17 is started to rotate, the rotating motor 17 further drives the connecting shaft 18 to rotate, the connecting shaft 18 further drives the sampling tube 10 to rotate, the sampling cup 31 is further driven to rotate, the soil is further rotationally twisted into the sampling cup 31, the second electric push rod 29 is started to retract the sampling cup 31, the sampling tube 10 is lifted out, the third electric push rod 32 is started to further drive the sample plate 33 to push out and collect the soil, the depth of a sampling point can be measured through the infrared range finder 13, and sampling of different depths can be performed.
As an example of the present utility model, the sampling mechanism 5 includes:
the drilling machine installation cavity 21, the drilling machine installation cavity 21 is arranged at the lower side of the sampling chamber 28;
the drilling machine 20, the drilling machine 20 is fixedly installed inside the drilling machine installation cavity 21;
the rotary shaft 19, one end of the rotary shaft 19 is fixedly connected with the output end of the drilling machine 20, and the rotary shaft 19 penetrates through the bottom cavity wall of the drilling machine installation cavity 21;
the drill bit 9, the drill motor installation cavity 21 is fixedly installed at one end of the rotary shaft 19;
the drilling motor 20 is started to rotate, the drilling motor 20 further drives the rotating shaft 19 to rotate, the rotating shaft 19 further drives the drill bit 9 to rotate, meanwhile, the air cylinder 15 is started to further drive the sampling mechanism mounting plate 12 to move downwards, the sampling tube 10 is further driven to move downwards, and the sampling tube 10 is further driven to enter soil through the through groove 8 and the drill bit 9.
As an example of the present utility model, the ground insertion mechanism 6 includes:
the lifting groove 26 is formed in the support column 4;
the first electric push rod 27 is fixedly arranged on the wall of the top part inside the lifting groove 26;
the motor mounting plate 24, the motor mounting plate 24 is fixedly mounted at the lower end of the first electric push rod 27;
the ground inserting motor 25 is fixedly arranged on the lower surface of the motor mounting plate 24;
the ground inserting screw rod 23, one end of the ground inserting screw rod 23 is fixedly connected with the input end of the ground inserting motor 25.
As an example of the present utility model, the base plate 1 includes:
the through groove 8 is formed in the bottom plate 1, and the through groove 8 is arranged corresponding to the sampling tube 10;
the through holes 22 are formed on two sides of the bottom plate 1, and the through holes 22 are arranged corresponding to the ground inserting screw rods 23;
the roller 11 is arranged on the lower surface of the bottom plate 1;
the whole device is moved to a sampling point through the roller 11, the ground inserting motor 25 is started to rotate, the ground inserting motor 25 further drives the ground inserting screw rod 23 to rotate, the first electric push rod 27 is started to further drive the motor mounting plate 24 to move downwards in the lifting groove 26, the ground inserting screw rod 23 is further driven to be inserted into soil through the through hole 22, and the device is further fixed.
Working principle: the whole device is moved to a sampling point through the roller 11, the ground inserting motor 25 is started to rotate, the ground inserting motor 25 is further driven to rotate to further drive the ground inserting screw rod 23 to rotate, the first electric push rod 27 is further driven to further drive the motor mounting plate 24 to move downwards in the lifting groove 26, the ground inserting screw rod 23 is further driven to be inserted into soil through the through hole 22, the device is further fixed, the ground drilling motor 20 is further started to rotate, the rotating shaft 19 is further driven to rotate the drill bit 9, meanwhile, the air cylinder 15 is started, the sampling mechanism mounting plate 12 is further driven to move downwards, the sampling cylinder 10 is further driven to move downwards, the sampling cup 31 is further driven to enter the soil through the through groove 8 and the drill bit 9, the second electric push rod 29 is started to further drive the sampling cylinder 10 to enter the soil, the sampling cup 31 to enter the soil through the sampling port 7, the rotating motor 17 is further started to rotate, the connecting shaft 18 is further driven to rotate, the sampling cup 31 is further driven to rotate, the second electric push rod 29 is further driven to rotate, the sampling cup 31 is further driven to rotate, the sampling cup 10 is further driven to rotate, the third electric push rod 32 is further to push the soil out of the soil until the soil is twisted into the soil, and the soil is measured, the soil is not measured, and the distance measuring device can be measured, and the depth of a sample can be measured, and the infrared measurement device can be measured.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. Geotechnical sampling device for geotechnical engineering, characterized by, include:
the device comprises a bottom plate (1), wherein support columns (4) are fixedly connected to two sides of the upper surface of the bottom plate (1);
the top plate (2), the top plate (2) is fixedly arranged at the top of the support column (4);
the lifting mechanism (3) is arranged on the top plate (2);
the sampling mechanism (5) is arranged at the lower side of the lifting mechanism (3);
the ground inserting mechanism (6) is arranged inside the support column (4).
2. A geotechnical sampling device for geotechnical engineering according to claim 1, wherein: the lifting mechanism (3) comprises:
the two air cylinders (15) are arranged, the two air cylinders (15) are fixedly arranged on two sides of the upper surface of the top plate (2), and the lower ends of the air cylinders (15) penetrate through the top plate (2);
the sampling mechanism mounting plate (12), the sampling mechanism mounting plate (12) is fixedly arranged at the lower end of the air cylinder (15);
the infrared range finder (13), infrared range finder (13) fixed mounting is in roof (2) upper surface.
3. A geotechnical sampling device for geotechnical engineering according to claim 1, wherein: the sampling mechanism (5) comprises:
the motor casing (14), the said motor casing (14) is fixedly mounted on the upper surface of the mounting plate (12) of the sampling mechanism;
a rotating electric machine (17), the rotating electric machine (17) being fixedly mounted inside the motor casing (14);
the connecting shaft (18), one end of the connecting shaft (18) is fixedly connected with the output end of the rotating motor (17);
the sampling tube (10), sampling tube (10) fixed mounting is in connecting axle (18) lower extreme.
4. A geotechnical sampling device for geotechnical engineering according to claim 1, wherein: the sampling mechanism (5) comprises:
a sampling chamber (28), wherein the sampling chamber (28) is arranged at the top of the interior of the sampling tube (10);
the fixing plate (30), the said fixing plate (30) is fixedly installed in the inside of the sampling tube (10);
the second electric push rods (29) are fixedly arranged on the surfaces of two sides of the fixed plate (30) at equal intervals;
the sampling cup (31), the said sampling cup (31) is fixedly connected to one end of the second electric push rod (29);
the sampling ports (7) are formed in the chamber walls on two sides of the sampling chamber (28) at equal intervals, and the sampling ports (7) are arranged corresponding to the sampling cups (31);
the third electric push rod (32), the third electric push rod (32) is fixedly arranged on one side surface of the inner part of the sampling cup (31);
the sample outlet plate (33), wherein the sample outlet plate (33) is fixedly connected with one end of the third electric push rod (32).
5. A geotechnical sampling device for geotechnical engineering according to claim 1, wherein: the sampling mechanism (5) comprises:
the drilling machine installing cavity (21), the drilling machine installing cavity (21) is arranged at the lower side of the sampling chamber (28);
the earth boring motor (20), the said earth boring motor (20) is fixedly installed in the installation cavity (21) of the earth boring motor;
one end of the rotating shaft (19) is fixedly connected with the output end of the drilling and electric machine (20), and the rotating shaft (19) penetrates through the bottom cavity wall of the drilling and electric machine installation cavity (21);
the drill bit (9), the drill motor installation cavity (21) is fixedly arranged at one end of the rotating shaft (19).
6. A geotechnical sampling device for geotechnical engineering according to claim 1, wherein: the earth-inserting mechanism (6) comprises:
the lifting groove (26) is formed in the support column (4);
the first electric push rod (27) is fixedly arranged on the groove wall at the top of the inner part of the lifting groove (26);
the motor mounting plate (24), the said motor mounting plate (24) is fixedly mounted on the lower end of the first electric push rod (27);
the ground inserting motor (25) is fixedly arranged on the lower surface of the motor mounting plate (24);
the ground inserting screw rod (23), one end of the ground inserting screw rod (23) is fixedly connected with the input end of the ground inserting motor (25).
7. A geotechnical sampling device for geotechnical engineering according to claim 3, wherein: the base plate (1) comprises:
the through groove (8) is formed in the bottom plate (1), and the through groove (8) is arranged corresponding to the sampling tube (10);
the through holes (22) are formed in two sides of the bottom plate (1), and the through holes (22) are arranged corresponding to the ground inserting screw rods (23);
the roller (11) is arranged on the lower surface of the bottom plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222727240.4U CN219511823U (en) | 2022-10-17 | 2022-10-17 | Rock and soil sampling device for geotechnical engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222727240.4U CN219511823U (en) | 2022-10-17 | 2022-10-17 | Rock and soil sampling device for geotechnical engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219511823U true CN219511823U (en) | 2023-08-11 |
Family
ID=87550541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222727240.4U Active CN219511823U (en) | 2022-10-17 | 2022-10-17 | Rock and soil sampling device for geotechnical engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219511823U (en) |
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2022
- 2022-10-17 CN CN202222727240.4U patent/CN219511823U/en active Active
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