CN220039862U - Sampling device for geotechnical engineering investigation well - Google Patents
Sampling device for geotechnical engineering investigation well Download PDFInfo
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- CN220039862U CN220039862U CN202320693935.7U CN202320693935U CN220039862U CN 220039862 U CN220039862 U CN 220039862U CN 202320693935 U CN202320693935 U CN 202320693935U CN 220039862 U CN220039862 U CN 220039862U
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- geotechnical engineering
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- 238000005070 sampling Methods 0.000 title claims abstract description 139
- 238000011835 investigation Methods 0.000 title claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 239000002689 soil Substances 0.000 abstract description 31
- 230000001681 protective effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000005527 soil sampling Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of geotechnical engineering investigation, in particular to a sampling device of a geotechnical engineering investigation exploratory well. When the sampling device is used, the frame is firstly placed on the working surface, then the lifting assembly is started to drive the movable plate to lift in the frame, the lifting assembly drives the sampling assembly to descend through the movable plate, the sampling assembly samples soil at the working surface, the lifting assembly is used for driving the sampling assembly to ascend after the sampling is finished, then the soil sample in the sampling assembly is taken out, the sampling of the soil is completed, the soil sample is ensured to reach the I-level sample standard, and the purpose that the sampling quality reaches the standard is achieved.
Description
Technical Field
The utility model relates to the technical field of geotechnical engineering investigation, in particular to a sampling device for a geotechnical engineering investigation exploratory well.
Background
At present, loess areas need to be evaluated for collapsibility and collapsibility level in geotechnical engineering investigation, so that a non-disturbance I-level sample needs to be obtained through manual excavation of an exploratory well, and a loess collapsibility index is obtained through an indoor geotechnical experiment, wherein the non-disturbance I-level sample needs to keep the natural structure, density and humidity of the non-disturbance I-level sample.
However, after the artificial exploratory well is excavated in the market at present, the soil sampling process is carried out by adopting a tool for sampling manually by workers, and soil sample disturbance can be caused in the operation process, so that the soil sample can not reach the I-level sample standard, thereby influencing loess collapsibility index and influencing the subsequent investigation quality of geotechnical engineering; meanwhile, manual sampling can consume a great deal of physical effort and waste time of the staff, and limb abrasion can occur at the same time, so that great inconvenience is brought to the soil sampling process of the staff.
In view of the foregoing, there is a need for an geotechnical survey well sampling device.
Disclosure of Invention
The utility model aims to provide a sampling device for a geotechnical engineering exploration well, which aims to solve the technical problem that the manual sampling quality in the prior art does not reach the standard.
In order to solve the technical problems, the sampling device for the geotechnical engineering exploration exploratory well provided by the utility model comprises a frame, a moving plate and a sampling assembly, wherein the moving plate is arranged in the frame, a lifting assembly is arranged between the moving plate and the frame, the lifting assembly drives the moving plate to lift in the frame, the sampling assembly is arranged on the moving plate, and the moving plate drives the sampling assembly to lift for sampling.
Through the technical scheme of above-mentioned improvement, when using sampling device, firstly place the frame on the working face, then start lifting unit and drive the movable plate and go up and down in the frame, lifting unit passes through the movable plate and drives sampling unit decline, sampling unit takes out the soil of working face department, utilize lifting unit to drive sampling unit through the movable plate after the sample finishes and rise, then take out the soil sample in the sampling unit, accomplish the sample of soil, utilize sampling device can guarantee the sampling quality, guarantee that the soil sample reaches I level sample standard, provide accurate loess collapsibility index for geotechnical test, guarantee investigation quality, reached the purpose that the sampling quality reached standard.
Further, the sampling assembly comprises a driving motor and a sampling rod, the driving motor is fixedly connected with the movable plate, the sampling rod is connected with the driving motor, and the driving motor is used for driving the sampling rod to rotate.
Further, set up drive assembly between driving motor and the sampling pole, drive assembly includes driving gear and driven gear, driving gear and driving motor fixed connection, and the sampling pole rotates with the movable plate to be connected, driven gear and sampling pole fixed connection, driving gear and driven gear meshing.
Further, one end of the sampling rod penetrates through the movable plate, and the sampling rod is rotationally connected with the movable plate through a fixed bearing.
Further, be provided with the spacing ring between sampling rod and the movable plate, the spacing ring is used for prescribing a limit to the sampling rod, makes the sampling rod be connected with the movable plate all the time.
Further, two limiting rings are arranged and are respectively arranged at two ends of the fixed bearing.
Further, the driving gear and the driven gear are sleeved with a protective shell, and the protective shell is fixedly connected with the movable plate.
Further, the driving motor is sleeved with a fixed shell, and the fixed shell is fixedly connected with the moving plate.
Further, a plurality of soil drilling grooves are formed in the bottom end of the sampling rod.
Through the improved technical scheme, when the sampling assembly is used, the driving motor is started to drive the driving gear to rotate, the driving gear drives the driven gear to rotate, the driven gear drives the sampling rod to rotate, and the sampling rod rotates to enter soil on a working surface to finish sampling; the driving motor is protected by the protective shell, the transmission assembly is protected by the protective shell, the sampling rod is limited to be fixed by the limiting ring, and the sampling rod is prevented from sliding in the fixed bearing in the sampling process, so that the sampling rod can slide relative to the moving plate.
Further, there is electric putter between movable plate and the frame, and electric putter is used for pushing out the sample in the sampling assembly.
Further, the telescopic end of the electric push rod is fixedly connected with a push block.
Further, the cross section of the pushing block is slightly smaller than that of the sampling rod.
Through the technical scheme of above-mentioned improvement, start electric putter after the sample is accomplished and drive the ejector pad and get into in the sample pole, electric putter and ejector pad promote the interior soil sample of sample pole and remove in the sample pole to release the sample pole with the interior soil sample of sample pole, promote the convenience when taking out of the interior soil sample of sample pole.
Further, the lifting assembly comprises a sliding rail, a sliding block, a screw rod and a forward and backward rotating motor, the sliding rail is fixedly connected with the frame, the sliding block is slidably connected in the sliding rail, the screw rod is rotationally connected in the sliding rail, the screw rod is in threaded connection with the sliding block, the forward and backward rotating motor is fixedly connected with the screw rod, the forward and backward rotating motor drives the screw rod to rotate, and the sliding block is fixedly connected with the moving plate.
Further, the housing is arranged at the position of the forward and backward rotating motor, and the housing is fixedly connected with the sliding rail.
Further, the sliding block is connected with the moving plate through a connecting rod, and two ends of the connecting rod are fixedly connected with the sliding block and the moving plate respectively.
Further, a vertical groove is formed in the upright post of the frame, and the connecting rod slides in the vertical groove.
According to the improved technical scheme, when the lifting assembly is used, the forward and reverse motor is started to drive the screw rod to rotate clockwise, the screw rod drives the sliding block to slide downwards in the sliding rail, and the sliding block drives the moving plate to slide downwards through the connecting rod, so that the moving plate drives the sampling assembly to move downwards for sampling; after the sampling is completed, the forward and reverse rotating motor drives the screw rod to rotate anticlockwise, the screw rod drives the sliding block to slide upwards in the sliding rail, the sliding block drives the moving plate to slide upwards through the connecting rod, so that the moving plate drives the sampling assembly to move upwards, and when the sampling rod is completely separated from the working surface, the sampling is completed.
Further, the bottom fixedly connected with backup pad of frame, the backup pad is used for supporting the frame.
Further, a pulley is fixedly connected below the supporting plate.
Further, the backup pad department is provided with a fixed section of thick bamboo, is provided with the dead lever in the fixed section of thick bamboo, and the dead lever slides in a fixed section of thick bamboo, and the bottom of dead lever inserts in the working face.
Further, the bottom of dead lever sets up to the toper.
Further, the top of the fixed rod is fixedly connected with a pressing plate.
Through the technical scheme of above-mentioned improvement, when removing the frame, promote the frame and drive the pulley through the backup pad and slide on the working face, when removing to the sampling region, promote the clamp plate and drive the dead lever and peg graft in the fixed cylinder, then promote in the bottom that the clamp plate drove the dead lever inserts the soil of working face, utilize dead lever and fixed cylinder to fix the position of frame on the working face, promote the stability of sampling device operation when taking a sample.
By adopting the technical scheme, the utility model has the following beneficial effects:
when the sampling device is used, the frame is firstly placed on the working surface, then the lifting assembly is started to drive the movable plate to lift in the frame, the lifting assembly drives the sampling assembly to descend through the movable plate, the sampling assembly samples soil at the working surface, the lifting assembly is used for driving the sampling assembly to ascend after the sampling is finished, then the soil sample in the sampling assembly is taken out, the sampling quality of the soil is finished, the sampling device is used for ensuring that the soil sample reaches the I-level sample standard, an accurate loess collapsibility index is provided for a geotechnical test, the reconnaissance quality is ensured, and the purpose that the sampling quality reaches the standard is achieved.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the utility model and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a sampling device for a geotechnical engineering exploration well, which is provided by an embodiment of the utility model;
FIG. 2 is a schematic diagram showing the structure of the bottom of the sampling device;
FIG. 3 is a schematic diagram showing the structure of the lifting assembly;
fig. 4 is a schematic diagram showing the structure of the sampling assembly.
Reference numerals:
1. a frame; 2. a support plate; 3. a fixed cylinder; 4. a sampling assembly; 41. a fixed case; 42. a driving motor; 43. a drive gear; 44. a driven gear; 45. a sampling rod; 46. fixing a bearing; 47. a limiting ring; 48. a protective shell; 5. a lifting assembly; 51. a slide rail; 52. a slide block; 53. a screw rod; 54. a forward and reverse rotation motor; 6. a housing; 7. an electric push rod; 8. a pushing block; 9. a fixed rod; 10. a pressing plate; 11. a pulley; 12. a connecting rod; 13. and (3) moving the plate.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; 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.
The utility model is further illustrated with reference to specific embodiments.
As shown in fig. 1 and fig. 2, the sampling device for the geotechnical engineering exploration exploratory well provided by the embodiment comprises a frame 1, a moving plate 13 and a sampling assembly 4, wherein the frame 1 is a portal frame, the moving plate 13 is horizontally arranged in the frame 1, a lifting assembly 5 is arranged between the moving plate 13 and two upright posts of the frame 1, the lifting assembly 5 drives the moving plate 13 to lift in the frame 1, the sampling assembly 4 is arranged on the moving plate 13, and the moving plate 13 drives the sampling assembly 4 to lift for sampling.
As shown in fig. 3 and 4, the sampling assembly 4 includes a driving motor 42 and a sampling rod 45, the driving motor 42 is disposed above the moving plate 13, the driving motor 42 is fixedly connected with the moving plate 13, the sampling rod 45 is vertically disposed in the frame 1, the sampling rod 45 is connected with the driving motor 42, and the driving motor 42 is used for driving the sampling rod 45 to rotate; in this embodiment, the top end of the sampling rod 45 penetrates through the moving plate 13, and the upper part of the sampling rod 45 near the top end is rotatably connected with the moving plate 13 through a fixed bearing 46; the driving motor 42 is connected with the sampling rod 45 through a transmission assembly, the transmission assembly comprises a driving gear 43 and a driven gear 44, the driving gear 43 and the driven gear 44 are arranged below the moving plate 13, the driving gear 43 and the driving motor 42 penetrate through a driving shaft of the moving plate 13 to be fixedly connected, the driven gear 44 is sleeved on the outer side of the sampling rod 45, the driven gear 44 is fixedly connected with the sampling rod 45, and the driving gear 43 and the driven gear 44 are meshed.
As shown in fig. 3 and 4, a limiting ring 47 is further disposed between the sampling rod 45 and the moving plate 13, and the limiting ring 47 is used for limiting the sampling rod 45, so that the sampling rod 45 is always connected with the moving plate 13; two limiting rings 47 are arranged, and the two limiting rings 47 are respectively arranged at two ends of the fixed bearing 46; in addition, in the present embodiment, a protective housing 48 is sleeved at the driving gear 43 and the driven gear 44, and the protective housing 48 is fixedly connected with the moving plate 13; the driving motor 42 is sleeved with a fixed shell 41, and the fixed shell 41 is fixedly connected with the moving plate 13; a plurality of soil drilling grooves are formed in the bottom end of the sampling rod 45, so that the sampling rod 45 can conveniently drill into soil.
As shown in fig. 1 and 2, an electric push rod 7 is arranged between the moving plate 13 and the cross beam of the frame 1, the electric push rod 7 is vertically arranged, the electric push rod 7 is used for pushing out a sample from the sampling assembly 4, and in the embodiment, the electric push rod 7 is an air cylinder; the telescopic end fixedly connected with ejector pad 8 of electric putter 7, the cross section of ejector pad 8 is slightly less than the cross section of sampling rod 45, ejector pad 8 and the interior soil sample top surface butt of sampling rod 45.
As shown in fig. 2 and 3, the lifting assembly 5 comprises two slide rails 51, a slide block 52, a screw rod 53 and a forward and backward rotating motor 54, the slide rails 51 are fixedly connected with two upright posts of the frame 1 respectively, the slide block 52 is slidably connected in the slide rails 51, the screw rod 53 is vertically arranged in the slide rails 51, two ends of the screw rod 53 are respectively and rotatably connected with the upper end face and the lower end face of the slide rail 51, the screw rod 53 is in threaded connection with the slide block 52, the forward and backward rotating motor 54 is fixedly connected with the screw rod 53, the forward and backward rotating motor 54 drives the screw rod 53 to rotate, and the slide block 52 is fixedly connected with the moving plate 13; the positive and negative rotation motor 54 is covered with a shell 6, and the shell 6 is fixedly connected with the sliding rail 51; the sliding block 52 is connected with the moving plate 13 through the connecting rod 12, and two ends of the connecting rod 12 are respectively fixedly connected with the sliding block 52 and the moving plate 13; vertical grooves are formed in the upright posts of the frame 1, and the connecting rods 12 slide in the vertical grooves.
As shown in fig. 1 and 2, the bottom end of a stand column of the stand frame 1 is fixedly connected with a support plate 2, and the support plate 2 is used for supporting the stand frame 1; in order to facilitate the movement of the frame 1 on the working surface, a pulley 11 is fixedly connected below the supporting plate 2; in addition, a fixed cylinder 3 is further arranged at the support plate 2, a fixed rod 9 is vertically arranged in the fixed cylinder 3, the fixed rod 9 slides in the fixed cylinder 3, and the bottom end of the fixed rod 9 is inserted into the working surface; the bottom end of the fixed rod 9 inserted into the ground is provided with a cone shape; the top end of the fixed rod 9 is fixedly connected with a pressing plate 10.
The implementation principle of the sampling device for the geotechnical engineering exploration well provided by the embodiment of the utility model is as follows: when the sampling device is used, the frame 1 is firstly placed on a working surface, then the frame 1 is pushed to drive the pulley 11 to slide on the working surface, when the frame 1 moves to a sampling area, the pushing pressure plate 10 drives the fixing rod 9 to be inserted into the fixing cylinder 3, then the pushing pressure plate 10 drives the bottom end of the fixing rod 9 to be inserted into soil of the working surface, and the position of the frame 1 is fixed on the working surface by the fixing rod 9 and the fixing cylinder 3.
Then the driving motor 42 is started to drive the driving gear 43 to rotate, the driving gear 43 drives the driven gear 44 to rotate, and the driven gear 44 drives the sampling rod 45 to rotate; then, the forward and reverse rotation motor 54 is started to drive the screw rod to rotate clockwise, the screw rod drives the sliding block 52 to slide downwards in the sliding rail 51, the sliding block 52 drives the moving plate 13 to slide downwards through the connecting rod 12, so that the moving plate 13 drives the sampling rod 45 to rotate into the soil of the working surface, and the soil at the working surface is sampled by the sampling rod 45; the forward and reverse rotation motor 54 drives the screw rod to rotate anticlockwise, the screw rod drives the sliding block 52 to slide upwards in the sliding rail 51, the sliding block 52 drives the moving plate 13 to slide upwards through the connecting rod 12, and therefore the sampling rod 45 of the moving plate 13 gradually rises from the soil of the working surface, and finally the sampling rod 45 is completely separated from the soil.
Finally, the electric push rod 7 is started to drive the push block 8 to enter the sampling rod 45, the electric push rod 7 and the push block 8 push the soil sample in the sampling rod 45 to move in the sampling rod 45, so that the soil sample in the sampling rod 45 is pushed out of the sampling rod 45, the sampling quality is finished, the sampling device is utilized to ensure the sampling quality, the soil sample is ensured to reach the I-level sample standard, an accurate loess collapsibility index is provided for geotechnical test, the investigation quality is ensured, and the purpose that the sampling quality reaches the standard is achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.
Claims (10)
1. The utility model provides a geotechnical engineering reconnaissance exploratory well sampling device, a serial communication port, this sampling device includes frame (1), movable plate (13) and sampling module (4), movable plate (13) set up in frame (1), be provided with lifting unit (5) between movable plate (13) and frame (1), lifting unit (5) drive movable plate (13) go up and down in frame (1), sampling module (4) set up on movable plate (13), movable plate (13) drive sampling module (4) go up and down and are used for the sample.
2. The geotechnical engineering investigation well sampling device according to claim 1, wherein the sampling assembly (4) comprises a driving motor (42) and a sampling rod (45), the driving motor (42) is fixedly connected with the moving plate (13), the sampling rod (45) is connected with the driving motor (42), and the driving motor (42) is used for driving the sampling rod (45) to rotate.
3. The geotechnical engineering investigation well sampling device according to claim 2, wherein a transmission assembly is arranged between the driving motor (42) and the sampling rod (45), the transmission assembly comprises a driving gear (43) and a driven gear (44), the driving gear (43) is fixedly connected with the driving motor (42), the sampling rod (45) is rotatably connected with the movable plate (13), the driven gear (44) is fixedly connected with the sampling rod (45), and the driving gear (43) is meshed with the driven gear (44).
4. Geotechnical engineering investigation well sampling device according to claim 2, characterized in that one end of the sampling rod (45) penetrates through the moving plate (13), and the sampling rod (45) is rotatably connected with the moving plate (13) through a fixed bearing (46).
5. Geotechnical engineering investigation well sampling device according to claim 4, characterized in that between the moving plate (13) and the frame (1) there is an electric push rod (7), the electric push rod (7) is used for pushing out the sample from the sampling assembly (4).
6. The geotechnical engineering investigation well sampling device according to claim 5, wherein the telescopic end of the electric push rod (7) is fixedly connected with a push block (8).
7. The geotechnical engineering investigation well sampling device according to claim 1, wherein the lifting assembly (5) comprises a sliding rail (51), a sliding block (52), a screw rod (53) and a forward and backward rotating motor (54), the sliding rail (51) is fixedly connected with the frame (1), the sliding block (52) is slidably connected in the sliding rail (51), the screw rod (53) is rotatably connected in the sliding rail (51), the screw rod (53) is in threaded connection with the sliding block (52), the forward and backward rotating motor (54) is fixedly connected with the screw rod (53), the forward and backward rotating motor (54) drives the screw rod (53) to rotate, and the sliding block (52) is fixedly connected with the moving plate (13).
8. The geotechnical engineering investigation well sampling device according to claim 7 is characterized in that the sliding block (52) is connected with the movable plate (13) through a connecting rod (12), two ends of the connecting rod (12) are fixedly connected with the sliding block (52) and the movable plate (13) respectively, vertical grooves are formed in the upright posts of the frame (1), and the connecting rod (12) slides in the vertical grooves.
9. The geotechnical engineering investigation well sampling device according to claim 1, wherein the bottom end of the frame (1) is fixedly connected with a supporting plate (2), and the supporting plate (2) is used for supporting the frame (1).
10. The geotechnical engineering investigation well sampling device according to claim 9, wherein a fixing cylinder (3) is arranged at the supporting plate (2), a fixing rod (9) is arranged in the fixing cylinder (3), the fixing rod (9) slides in the fixing cylinder (3), and the bottom end of the fixing rod (9) is inserted into a working surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320693935.7U CN220039862U (en) | 2023-03-31 | 2023-03-31 | Sampling device for geotechnical engineering investigation well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320693935.7U CN220039862U (en) | 2023-03-31 | 2023-03-31 | Sampling device for geotechnical engineering investigation well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220039862U true CN220039862U (en) | 2023-11-17 |
Family
ID=88723187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320693935.7U Active CN220039862U (en) | 2023-03-31 | 2023-03-31 | Sampling device for geotechnical engineering investigation well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220039862U (en) |
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2023
- 2023-03-31 CN CN202320693935.7U patent/CN220039862U/en active Active
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