CN113720652B - Sampling structure for underwater detection equipment - Google Patents
Sampling structure for underwater detection equipment Download PDFInfo
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- CN113720652B CN113720652B CN202111015702.3A CN202111015702A CN113720652B CN 113720652 B CN113720652 B CN 113720652B CN 202111015702 A CN202111015702 A CN 202111015702A CN 113720652 B CN113720652 B CN 113720652B
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- cylinder
- sliding
- limiting cylinder
- sliding cylinder
- fixedly connected
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- 238000005070 sampling Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 13
- 230000000712 assembly Effects 0.000 claims abstract description 10
- 238000000429 assembly Methods 0.000 claims abstract description 10
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 239000013049 sediment Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
- G01N2001/1445—Overpressure, pressurisation at sampling point
- G01N2001/1454—Positive displacement, piston
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a sampling structure for underwater detection equipment, which comprises a limiting cylinder, wherein a plurality of extension assemblies are arranged on the outer wall of the bottom of the limiting cylinder, one end, far away from the limiting cylinder, of each extension assembly is connected with a plurality of side plates, and one side of the top end of each side plate is in friction contact with the outside of the limiting cylinder; the limiting cylinder is sleeved with a sliding cylinder in a sliding manner, the sliding cylinder is sleeved with a piston rod in a sliding manner, the top end of the piston rod is coaxially and fixedly connected with a pressing block, the outer wall of the bottom end of the sliding cylinder is provided with a plurality of extension assemblies, one end of each extension assembly, which is far away from the sliding cylinder, is connected with the lower end of the side plate, the top end of the limiting cylinder is fixedly connected with one end of a spring, and the other end of the spring is in friction contact with the bottom of the pressing block. The piston rod is pressed down by pressing the pressing block, and the pressing block is driven to contact with the sliding cylinder when the piston rod is pressed down.
Description
Technical Field
The invention relates to the technical field of underwater detection equipment, in particular to a sampling structure for the underwater detection equipment.
Background
The deep sea sediment is a submarine substance formed by ocean sediment action, contains a large amount of geological and biological information, and is of great significance to deep sea mineral resource environment assessment and later resource exploitation by developing investigation and research on the type and distribution, handling and power processes, geotechnical characteristics, microbial communities and the like of the deep sea sediment.
The invention discloses an underwater silt layer sampling device, which relates to a sampling device, in particular to an underwater silt layer sampling device, as disclosed in the issued patent number CN 206772643U. The invention aims to solve the problems that the existing silt soil sampling device is difficult to obtain a high-quality undisturbed core sample, the equipment is heavy, the transportation, the installation and the use are inconvenient, the sampling cost is high and the like. The invention comprises an extension bar, a connecting body, a one-way valve cover assembly, a one-way valve body and a sampling barrel, wherein the extension bar, the connecting body, the one-way valve cover assembly, the one-way valve body and the sampling barrel are sequentially connected from top to bottom.
This practical inside sample seals through the pressure that the check valve bore, and the leakproofness is undulant great, probably can cause the sample to run off under the different environment, for this reason we propose a sampling structure for detecting equipment under water and are used for solving above-mentioned problem.
Disclosure of Invention
The invention aims to provide a sampling structure for underwater detection equipment, which solves the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions: the sampling structure for the underwater detection equipment comprises a limiting cylinder, wherein a plurality of extension assemblies are arranged on the outer wall of the bottom of the limiting cylinder, one end, far away from the limiting cylinder, of each extension assembly is connected with a plurality of side plates, and one side of the top end of each side plate is in friction contact with the outside of the limiting cylinder;
The sliding sleeve of the limiting cylinder is provided with a sliding cylinder, the sliding sleeve of the sliding cylinder is provided with a piston rod, the top end of the piston rod is coaxially and fixedly connected with a pressing block, the outer wall of the bottom end of the sliding cylinder is provided with a plurality of extension assemblies, one end of each extension assembly, which is far away from the sliding cylinder, is connected with the lower end of the side plate, the top end of the limiting cylinder is fixedly connected with one end of a spring, and the other end of the spring is in friction contact with the bottom of the pressing block.
Preferably, the side plates are arranged in an annular array by taking the axis of the limiting cylinder as an array point, and the four side plates are combined to form a cylindrical and conical stacked structure.
Preferably, one side of the top of the side plate is fixedly connected with an arc-shaped top plate, one end of the arc-shaped top plate, which is far away from the side plate, is in friction tight connection with the outer wall of the limit cylinder, and the bottom of the side plate is fixedly connected with a conical bottom plate.
Preferably, the extension assembly comprises two first bases, the first bases are fixedly connected to the bottoms of the limiting cylinder and the sliding cylinder respectively, a connecting rod is rotatably installed at one end of each first base, one end, away from the first base, of each connecting rod is rotatably connected with a second base, and the second bases are fixedly connected to two sides of the inner wall of the side plate.
Preferably, the sliding cylinder consists of a first movable cylinder and a second movable cylinder which are connected by a thread structure, and a sealing ring is arranged at the sliding connection part of the sliding cylinder and the limiting cylinder.
Preferably, one end of the piston rod, which is far away from the pressing block, is coaxially and fixedly connected with a piston, and the piston is in sliding clamping connection in the sliding cylinder.
Compared with the prior art, the invention has the beneficial effects that: the piston rod is pressed downwards through the pressing block, the pressing block is driven to contact with the sliding cylinder when the piston rod is pressed downwards, the sliding cylinder is driven to be pressed downwards, the side plates are driven to be unfolded through the stretching assembly when the sliding cylinder is pressed downwards, the side plates can be inserted into the submarine sediment through the conical bottom plate after being unfolded, the pressing block is loosened after the opened side plates are inserted, the piston rod is driven to move upwards to reset under the action of spring force, the piston at the end part of the piston rod sucks the submarine sediment into the sliding cylinder, the sliding cylinder moves upwards under the action of the spring force, the side plates are driven to be closed through the stretching assembly, the closed side plates form a cylindrical and conical stacked structure, the submarine sediment inside is stored, and negative pressure is formed in the sliding cylinder by the piston, so that the submarine sediment sample is prevented from falling, the integrity of the sample is guaranteed, and the structure is simple and the operation is convenient; the sliding cylinder connected through the thread structure is convenient to take out the internal sample.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the present invention after closing;
FIG. 3 is a schematic view of the partial structure of the present invention after being unfolded;
Fig. 4 is a cross-sectional view of a stopper rod according to the present invention.
In the figure: 1. a side plate; 11. an arc-shaped top plate; 12. a conical bottom plate; 2. a limiting cylinder; 3. a sliding cylinder; 31. a first movable cylinder; 32. a second movable cylinder; 4. a piston rod; 41. pressing the blocks; 42. a piston; 5. a spring; 6. an extension assembly; 61. a first base; 62. a connecting rod; 63. and a second base.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution: the sampling structure for the underwater detection equipment comprises a limiting cylinder 2, wherein a plurality of extension assemblies 6 are arranged on the outer wall of the bottom of the limiting cylinder 2, one ends of the extension assemblies 6, which are far away from the limiting cylinder 2, are connected with a plurality of side plates 1, and one sides of the top ends of the side plates 1 are in friction contact with the outside of the limiting cylinder 2;
As shown in fig. 1-4, the sliding sleeve of the limiting cylinder 2 is provided with a sliding cylinder 3, the sliding cylinder 3 consists of a first movable cylinder 31 and a second movable cylinder 32 which are connected by a threaded structure, after sampling is completed, an operator can take out the first movable cylinder 31 after rotating the first movable cylinder 31 through the sliding cylinder 3 connected by the threaded structure, and the sample inside the sliding cylinder 3 can be conveniently and rapidly taken out. The sliding connection department of the sliding cylinder 3 and the limiting cylinder 2 is provided with a sealing ring, a piston rod 4 is sleeved in the sliding cylinder 3 in a sliding manner, the top end of the piston rod 4 is coaxially fixedly connected with a pressing block 41, one end of the piston rod 4, which is far away from the pressing block 41, is coaxially fixedly connected with a piston 42, the piston 42 is in sliding connection with the sliding cylinder 3 in a clamping manner, a plurality of extension assemblies 6 are installed on the outer wall of the bottom end of the sliding cylinder 3, each extension assembly 6 comprises two first bases 61, the first bases 61 are fixedly connected to the bottoms of the limiting cylinder 2 and the sliding cylinder 3 respectively, one ends of the first bases 61 are rotatably provided with connecting rods 62, one ends of the connecting rods 62, which are far away from the first bases 61, are rotatably connected with second bases 63, the second bases 63 are fixedly connected to the two sides of the inner walls of the side plates 1, one ends of the extension assemblies 6, which are far away from the sliding cylinder 3, are connected to the lower ends of the side plates 1, the top end of the limiting cylinder 2 is fixedly connected with one ends of the springs 5, and the other ends of the springs 5 are in friction contact with the bottoms of the pressing block 41. When in use, the limiting cylinder 2 is clamped by a hand or a mechanical arm, after the clamping is fixed, the pressing block 41 is pressed, the piston rod 4 is driven to move downwards, when the piston rod 4 moves downwards, the piston 42 at the end part synchronously moves downwards in the sliding cylinder 3, air or water in the sliding cylinder 3 is discharged, after the pressing block 41 is pressed and contacted with the end part of the sliding cylinder 3, the pressing block 41 is continuously pressed to drive the sliding cylinder 3 to move, when the sliding cylinder 3 moves, the first base 61 of the extension assembly 6 at the outer wall of the bottom moves, the connecting rod 62 is driven to rotate, the connecting rod 62 drives the side plate 1 to open into a structure shown in figure 1 through the second base 63,
As shown in fig. 1-4, four side plates 1 are arranged in an annular array by taking the axle center of the limiting cylinder 2 as an array point, and the four side plates 1 are combined to form a cylindrical and conical stacked structure. The side of every curb plate 1 all rigid coupling has the sealing strip of assurance leakproofness, and the top one side rigid coupling of curb plate 1 has arc roof 11, and the one end friction close connection of curb plate 1 is kept away from to arc roof 11 is spacing the outer wall of section of thick bamboo 2, and the bottom rigid coupling of curb plate 1 has toper bottom plate 12. The limiting cylinder 2, sliding cylinder 3 and piston rod 4 junction all is equipped with the sealing plug of assurance leakproofness, after sliding cylinder 3 tip and limiting cylinder 2 parallel and level, curb plate 1 opens to the biggest, can insert the toper bottom plate 12 of curb plate 1 bottom in the seabed deposit this moment, during the time of inserting, the deposit of seabed is full of in the cavity of cylinder and cone structure that curb plate 1 formed, after curb plate 1 wholly inserts and accomplishes, loosen press block 41, the spring 5 elasticity effect of pressing block 41 bottom contact drives piston rod 4 and reciprocates, piston rod 4 drives tip piston 42 synchronous motion, piston 42 moves in the time, the seabed deposit in the suction curb plate 1 is in the sliding cylinder 3, when piston 42 moves to sliding cylinder 3 top, limit through the spacing ring of sliding cylinder 3 internal fixation keeps the position fixed, at this moment spring 5 elasticity continues to drive sliding cylinder 3 and moves back up, the time, the extension assembly 6 of drive bottom lateral wall resets, the first base 63 of extension assembly 6 drives the second base 63 of rotating the connection towards the direction of limiting cylinder 2 through connecting rod 62 and moves, second base 63 and then drives the curb plate 1 of rigid coupling and closes each other, form the closed cylinder and pile up structure, simultaneously, the sample is deposited in the closed structure is also kept to the seabed sample in the closed cylinder 3, the sample is convenient to the sample is deposited in the closed, the sample is formed in the closed structure of the seabed, simultaneously, the sample is deposited in the complete is guaranteed to be deposited in the sample is easy to be deposited, simultaneously, the sample is deposited in the sample is easy to be deposited.
Working principle: when the invention is used, the limiting cylinder 2 is clamped by holding or mechanical arms, after the clamping is carried out, the pressing block 41 is pressed, the piston rod 4 is driven to move downwards, when the piston rod 4 moves downwards, the end part of the piston 42 moves downwards synchronously in the sliding cylinder 3, air or water in the sliding cylinder 3 is discharged, after the pressing block 41 is pressed and contacted with the end part of the sliding cylinder 3, the pressing block 41 is continuously pressed to drive the sliding cylinder 3 to move, when the sliding cylinder 3 moves, the first base 61 of the extension component 6 on the outer wall of the bottom moves, and then the connecting rod 62 is driven to rotate, the connecting rod 62 drives the side plate 1 to open through the second base 63, when the end part of the sliding cylinder 3 is flush with the limiting cylinder 2, the side plate 1 is opened to the maximum, at this moment, the conical bottom plate 12 at the bottom end of the side plate 1 can be inserted into the seabed deposition, when the seabed deposition is filled with the cylindrical and conical structure cavity formed by the side plate 1, after the whole insertion of the side plate 1 is completed, the pressing block 41 is released, the spring 5 contacted with the bottom end part of the pressing block 41 drives the piston rod 4 to move back, the end part of the piston rod 4 drives the piston 42 to move synchronously, when the piston 42 moves, the bottom plate 3 is sucked into the bottom plate 1, the bottom 3 moves to the bottom plate 3 is driven to move towards the second base 6, and the top end part is driven to rotate, and the cylindrical side plate 3 is further, and the cylindrical side plate 3 is driven to rotate, and the cylindrical 3 is driven to move towards the top end 3 is closed, and the cylindrical bottom 3 is further, and the cylindrical bottom is kept to move, and the cylindrical bottom 3 is closed, and is kept to move, and the cylindrical bottom is closed, and the cylindrical bottom is positioned, and is kept, and is positioned, the elastic force of the spring 5 keeps the closing of the side plate 1 and the negative pressure formed by the piston 42 in the sliding cylinder 3, so that the deposited sample at the bottom of the sea is prevented from falling, the integrity of the sample is ensured, and meanwhile, the structure is simple and the operation is convenient; after the sampling is completed, an operator can take out the first movable barrel 31 after rotating the first movable barrel 31 through the sliding barrel 3 connected by the thread structure, so that the sample inside the sliding barrel 3 can be conveniently and rapidly taken out.
Although embodiments of the present invention 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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. Sampling structure for underwater detection equipment, comprising a limiting cylinder (2), characterized in that: a plurality of extension assemblies (6) are arranged on the outer wall of the bottom of the limiting cylinder (2), one end, far away from the limiting cylinder (2), of each extension assembly (6) is connected with a plurality of side plates (1), and one side of the top end of each side plate (1) is in friction contact with the outside of the corresponding limiting cylinder (2);
the limiting cylinder (2) is internally sleeved with a sliding cylinder (3) in a sliding manner, a piston rod (4) is internally sleeved in the sliding cylinder (3), a pressing block (41) is coaxially and fixedly connected to the top end of the piston rod (4), a plurality of extension assemblies (6) are mounted on the outer wall of the bottom end of the sliding cylinder (3), one end, far away from the sliding cylinder (3), of each extension assembly (6) is connected to the lower end of the side plate (1), one end of a spring (5) is fixedly connected to the top end of the limiting cylinder (2), and the other end of the spring (5) is in friction contact with the bottom of the pressing block (41);
The extension assembly (6) comprises two first bases (61), the first bases (61) are fixedly connected to the bottoms of the limiting cylinder (2) and the sliding cylinder (3) respectively, a connecting rod (62) is rotatably arranged at one end of the first base (61), a second base (63) is rotatably connected to one end, far away from the first base (61), of the connecting rod (62), and the second base (63) is fixedly connected to two sides of the inner wall of the side plate (1).
2. A sampling structure for an underwater detection apparatus as claimed in claim 1, wherein: the side plates (1) are arranged in an annular array by taking the axle center of the limiting cylinder (2) as an array point, and the four side plates (1) are combined to form a cylindrical and conical stacked structure.
3. A sampling structure for an underwater detection apparatus as claimed in claim 1, wherein: the top one side rigid coupling of curb plate (1) has arc roof (11), the one end friction close connection spacing section of thick bamboo (2) of curb plate (1) is kept away from to arc roof (11), the bottom rigid coupling of curb plate (1) has toper bottom plate (12).
4. A sampling structure for an underwater detection apparatus as claimed in claim 1, wherein: the sliding cylinder (3) consists of a first movable cylinder (31) and a second movable cylinder (32) which are connected through a threaded structure, and a sealing ring is arranged at the sliding connection part of the sliding cylinder (3) and the limiting cylinder (2).
5. A sampling structure for an underwater detection apparatus as claimed in claim 1, wherein: one end of the piston rod (4) far away from the pressing block (41) is coaxially and fixedly connected with a piston (42), and the piston (42) is in sliding clamping connection in the sliding cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111015702.3A CN113720652B (en) | 2021-08-31 | 2021-08-31 | Sampling structure for underwater detection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111015702.3A CN113720652B (en) | 2021-08-31 | 2021-08-31 | Sampling structure for underwater detection equipment |
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| Publication Number | Publication Date |
|---|---|
| CN113720652A CN113720652A (en) | 2021-11-30 |
| CN113720652B true CN113720652B (en) | 2024-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111015702.3A Active CN113720652B (en) | 2021-08-31 | 2021-08-31 | Sampling structure for underwater detection equipment |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1500898A1 (en) * | 1987-11-17 | 1989-08-15 | Донецкий политехнический институт | Apparatus for sampling |
| CN209945759U (en) * | 2019-04-26 | 2020-01-14 | 浙江海洋大学 | Seabed sampler |
| CN210513776U (en) * | 2019-07-10 | 2020-05-12 | 张馨玉 | Special sampler of resource reconnaissance |
| CN210863228U (en) * | 2019-11-06 | 2020-06-26 | 王跃 | Geological survey equipment convenient to use |
| CN211148143U (en) * | 2019-12-17 | 2020-07-31 | 南京优翔环保科技有限公司 | Stratified sampling device for columnar sediment sampler |
| CN211740645U (en) * | 2019-12-26 | 2020-10-23 | 重庆能源职业学院 | Sampling device for food detection |
| CN211784405U (en) * | 2020-01-17 | 2020-10-27 | 北海市第二中学(北京八中北海分校) | Sediment sampling device for ocean water quality testing |
| CN212482990U (en) * | 2020-06-10 | 2021-02-05 | 河南天宇牧业有限公司 | A sampling device for pig feed safety detects |
-
2021
- 2021-08-31 CN CN202111015702.3A patent/CN113720652B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1500898A1 (en) * | 1987-11-17 | 1989-08-15 | Донецкий политехнический институт | Apparatus for sampling |
| CN209945759U (en) * | 2019-04-26 | 2020-01-14 | 浙江海洋大学 | Seabed sampler |
| CN210513776U (en) * | 2019-07-10 | 2020-05-12 | 张馨玉 | Special sampler of resource reconnaissance |
| CN210863228U (en) * | 2019-11-06 | 2020-06-26 | 王跃 | Geological survey equipment convenient to use |
| CN211148143U (en) * | 2019-12-17 | 2020-07-31 | 南京优翔环保科技有限公司 | Stratified sampling device for columnar sediment sampler |
| CN211740645U (en) * | 2019-12-26 | 2020-10-23 | 重庆能源职业学院 | Sampling device for food detection |
| CN211784405U (en) * | 2020-01-17 | 2020-10-27 | 北海市第二中学(北京八中北海分校) | Sediment sampling device for ocean water quality testing |
| CN212482990U (en) * | 2020-06-10 | 2021-02-05 | 河南天宇牧业有限公司 | A sampling device for pig feed safety detects |
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| CN113720652A (en) | 2021-11-30 |
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