CN115326481B - Sampling device with adjustable in marine engineering adopts sand water pollution prevention and cure - Google Patents
Sampling device with adjustable in marine engineering adopts sand water pollution prevention and cure Download PDFInfo
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- CN115326481B CN115326481B CN202211245263.XA CN202211245263A CN115326481B CN 115326481 B CN115326481 B CN 115326481B CN 202211245263 A CN202211245263 A CN 202211245263A CN 115326481 B CN115326481 B CN 115326481B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
- B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
- B63C11/52—Tools specially adapted for working underwater, not otherwise provided for
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/20—Controlling water pollution; Waste water treatment
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Abstract
The invention discloses an adjustable sampling device for preventing and treating sand production water pollution in ocean engineering, which comprises a first air cylinder, wherein an increased buoyancy cavity is arranged in the first air cylinder, a sliding cylinder is connected in the increased buoyancy cavity in a sealing sliding manner, one end of the sliding cylinder, which is far away from the first air cylinder, is fixedly connected with a mounting plate, one side wall of the mounting plate is fixedly connected with a mounting ring, a sampling cylinder is fixedly connected in the mounting ring, a sampling groove is arranged in the sampling cylinder, and a sampling hole is arranged at one end, which is close to the mounting plate, of the sampling cylinder. According to the invention, the mathematical relationship that the water pressure is in direct proportion to the water depth is utilized, the position of the regulating plate is regulated by twisting the knob according to the depth to be sampled, and the pressure value of the preset pressure cavity is preset, so that the invention can automatically and quickly start sampling work after the sampling depth is lowered, and the vertical horse starts to float after the sampling is completed, thus the sampling precision is high, the use is very simple and convenient, and other redundant additional operations are not needed.
Description
Technical Field
The invention relates to the technical field of water pollution control and sampling, in particular to an adjustable sampling device for sand production water pollution control in ocean engineering.
Background
Ocean engineering is a new construction, reconstruction and extension engineering which aims at developing, utilizing, protecting and recovering ocean resources and is characterized in that an engineering main body is positioned on the side of a coastline facing the sea. In the process of underwater sand production operation in the ocean, when the sand production amount is too much, the biological ecology of the ocean deep water environment can be influenced, and then the water pollution phenomenon is caused, and in order to better know and protect the ocean environment so as to prevent the water pollution phenomenon, the seawater needs to be frequently subjected to deep sampling to know the water quality conditions of water areas with different depths.
When the existing sampling device for ocean engineering is used, the device is usually used for submerging by self gravity, then the sampling depth is controlled by means of the traction rope, as the seawater flows and the flow rates of the seawater are different from place to place, the traction rope is not in a vertical state, and therefore the sampling depth cannot be judged and controlled according to the extending length of the traction rope, so that the sampling depth error is large, the sampling device is only suitable for some shallow sampling work, but not suitable for deep sampling work, and after sampling is completed, the whole device is required to be pulled up again, the operation is complex, and the use is very inconvenient.
Disclosure of Invention
The invention aims to solve the defects existing in the prior art, such as: the current ration sampling device for ocean engineering is when using, generally utilize device self gravity to dive, then control the sampling depth with the help of the traction rope, because the sea water is mobile, and the sea water everywhere velocity of flow is different, consequently the traction rope is not in vertical state, consequently can't judge and control the sampling depth according to the length that the traction rope stretches out for sampling depth error is very big, can only be applicable to some shallow layer sampling work, and can't be applicable to deep sampling work, moreover after the sample is accomplished, still need pull up whole device again, complex operation, it is very inconvenient to use.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a sampling device with adjustable adopt sand water pollution prevention and cure in ocean engineering, includes first cylinder, be equipped with in the first cylinder and increase buoyancy chamber, increase buoyancy intracavity sealing sliding connection and have a smooth section of thick bamboo, fixedly connected with mounting panel on the one end that first cylinder was kept away from to smooth section of thick bamboo, fixedly connected with collar on the one side wall of mounting panel, fixedly connected with sampling tube in the collar, be equipped with the sampling groove in the sampling tube, be equipped with the sample hole on the one end that sampling tube is close to the mounting panel, fixedly connected with supporting shoe on the one side wall that first cylinder is close to sampling tube, fixedly connected with bracing piece on the one side wall that the supporting shoe is close to sampling tube, the bracing piece is located fixedly connected with piston on the one end of sampling groove, piston sealing sliding connection is in the sampling groove, fixedly connected with communicating pipe on the one end that first cylinder was kept away from to communicating pipe, fixedly connected with second cylinder on the one end that first cylinder was kept away from. The second cylinder is internally and fixedly connected with a partition board, a preset pressure cavity and an accumulation cavity are respectively arranged in the second cylinder, the communicating pipe is used for communicating the buoyancy cavity with the accumulation cavity, a switching device is arranged on the communicating pipe, a pressure balancing device is arranged on one side wall of the first cylinder, and a pressure adjusting device is arranged in the preset pressure cavity.
Preferably, the switch device comprises a mounting block, the mounting block is arranged on the communicating pipe, a sliding groove is arranged in the mounting block, a baffle is connected in the sliding groove in a sliding mode, and a guide post penetrating through the mounting block is fixedly connected on the baffle.
Preferably, the pressure balancing device comprises a third cylinder, the third cylinder is fixedly connected to a side wall of the first cylinder, which is far away from the sampling tube, a pressure balancing cavity is arranged in the third cylinder, a movable plate is connected in the pressure balancing cavity in a sealing sliding manner, a connecting pipe is fixedly connected between the second cylinder and the third cylinder, the connecting pipe is used for communicating the preset pressure cavity with the pressure balancing cavity, a through hole is formed in the connecting pipe, and the guide pillar is connected in the two through holes in a sealing sliding manner.
Preferably, the connecting pipe is internally provided with a sealing column in a sealing sliding connection manner, the sealing column is provided with a hollow groove, and the guide pillar is in sealing sliding connection in the hollow groove.
Preferably, the pressure adjusting device comprises an adjusting plate, the adjusting plate is in sealing sliding connection in a preset pressure cavity, an installation pipe communicated with the preset pressure cavity is fixedly connected to the second cylinder, a threaded rod is connected to the installation pipe in a threaded mode, and the threaded rod is connected with the adjusting plate in a rotating mode.
Preferably, the threaded rod is fixedly connected with a knob on one end far away from the adjusting plate, and an anti-skid thread is arranged on the outer side wall of the knob.
Preferably, the guide post is fixedly connected with a floating ball, and the floating ball is made of a light material.
The beneficial effects of the invention are as follows:
1. according to the invention, after the sampling depth is lowered, the pressure at two ends of the sealing column is the same, the friction resistance of the empty groove to the sealing column is reduced to zero, the floating ball drives the baffle, the guide pillar and the floating ball to move upwards along the sliding groove against the gravity and the friction resistance of the sliding groove to the baffle, so that the baffle can not block the communicating pipe, high-pressure air in the pressure accumulation cavity enters the buoyancy increasing cavity through the communicating pipe, the sliding cylinder extends out of the buoyancy increasing cavity against the water pressure, the high-pressure air accumulated in the pressure accumulation cavity is utilized to drive the sliding cylinder to move quickly, and the sliding cylinder moves through the installation ring to rapidly finish the seawater sampling work of the water depth.
2. In the sampling process, along with the extension of the sliding cylinder, the whole volume of the device is increased, the gravity is unchanged, the buoyancy is improved, the increased buoyancy enables the whole buoyancy of the device to be greater than the gravity, therefore, after the sampling is finished, the device can automatically float under the action of the buoyancy, because the seawater sampling is rapidly and automatically carried out after the device reaches the preset target water depth, and the vertical horse starts to float upwards after the sampling is finished, the sampling precision is high, and the device is very simple and convenient to use, and does not need other redundant additional operations.
3. The invention can automatically float on the sea surface, and in the floating process, along with the reduction of water pressure, the movable plate moves outwards along the pressure balance cavity, the whole device is subjected to larger and larger buoyancy force, and the floating speed is higher and higher, so that the device can float on the water surface rapidly, and the device can be pulled up slightly without a rope, so that a great amount of time can be saved, the deep sampling work of ocean engineering is obviously promoted, and in order to find the device after floating, a positioning device can be arranged on the device, and a rope can be arranged on the device.
Drawings
FIG. 1 is a schematic diagram of an adjustable sampling device for preventing and controlling sand production water pollution in ocean engineering;
FIG. 2 is a schematic diagram of an adjustable sampling device for preventing and controlling sand production water pollution in ocean engineering;
FIG. 3 is a left side view of an adjustable sampling device for preventing and controlling sand production water pollution in ocean engineering according to the invention;
FIG. 4 is a section A-A of FIG. 3;
FIG. 5 is a front view of an adjustable sampling device for preventing and controlling sand production water pollution in ocean engineering according to the invention;
fig. 6 is a sectional view of B-B in fig. 5.
In the figure: 1 a first cylinder, 2 a buoyancy chamber, 3 a sliding cylinder, 4 a mounting plate, 5 a mounting ring, 6 a sampling cylinder, 7 a sampling groove, 8 a sampling hole, 9 a supporting block, 10 a supporting rod, 11 a piston, 12 a communicating pipe, 13 a second cylinder, 14 a partition plate, 15 a preset pressure chamber, 16 a pressure accumulation chamber, 17 a mounting block, 18 a sliding chute, 19 a baffle, 20 a guide pillar, 21 a floating ball, 22 a third cylinder, 23 a pressure balance chamber, 24 a movable plate, 25 a connecting pipe, 26 a regulating plate, 27 a mounting pipe, 28 a threaded rod and 29 a sealing column.
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.
Referring to fig. 1-6, an adjustable sampling device for preventing and controlling sand production water pollution in ocean engineering comprises a first cylinder 1, wherein a buoyancy increasing cavity 2 is arranged in the first cylinder 1, a sliding cylinder 3 is connected in a sealing sliding manner in the buoyancy increasing cavity 2, a mounting plate 4 is fixedly connected to one end of the sliding cylinder 3, which is far away from the first cylinder 1, a mounting ring 5 is fixedly connected to one side wall of the mounting plate 4, a sampling cylinder 6 is fixedly connected to the mounting ring 5, a sampling groove 7 is arranged in the sampling cylinder 6, a sampling hole 8 is arranged at one end, which is close to the mounting plate 4, of the sampling cylinder 6, a supporting block 9 is fixedly connected to one side wall, which is close to the sampling cylinder 6, of the first cylinder 1, and a supporting rod 10 is fixedly connected to one side wall, which is close to the sampling cylinder 6, of the supporting block 9.
The bracing piece 10 is located fixedly connected with piston 11 on the one end in the sampling tank 7, and piston 11 sealing sliding connection is in the sampling tank 7, and fixedly connected with communicating pipe 12 on the one end of first cylinder 1, fixedly connected with second cylinder 13 on the one end that communicating pipe 12 kept away from first cylinder 1. The second cylinder 13 is fixedly connected with a partition plate 14, a preset pressure cavity 15 and a pressure accumulation cavity 16 are respectively arranged in the second cylinder 13, the communicating pipe 12 is communicated with the buoyancy increasing cavity 2 and the pressure accumulation cavity 16, the second cylinder 13 is provided with an inflation valve communicated with the pressure accumulation cavity 16, the communicating pipe 12 is provided with a switching device, the switching device comprises a mounting block 17, and the mounting block 17 is arranged on the communicating pipe 12.
The installation piece 17 is internally provided with a chute 18, a baffle 19 is connected in the chute 18 in a sliding way, a guide pillar 20 penetrating through the installation piece 17 is fixedly connected to the baffle 19, a floating ball 21 is fixedly connected to the guide pillar 20, a pressure balancing device is arranged on one side wall of the first cylinder 1 and comprises a third cylinder 22, the third cylinder 22 is fixedly connected to one side wall of the first cylinder 1 far away from the sampling tube 6, a pressure balancing cavity 23 is arranged in the third cylinder 22, a movable plate 24 is connected in the pressure balancing cavity 23 in a sealing sliding way, a connecting pipe 25 is fixedly connected between the second cylinder 13 and the third cylinder 22, and the connecting pipe 25 is used for communicating the preset pressure cavity 15 with the pressure balancing cavity 23.
The connecting pipe 25 is provided with through holes, the guide posts 20 are connected in the two through holes in a sealing sliding manner, the connecting pipe 25 is internally provided with a sealing post 29 in a sealing sliding manner, the sealing post 29 is provided with a hollow groove, the guide posts 20 are connected in the hollow groove in a sealing sliding manner, the preset pressure cavity 15 is internally provided with a pressure adjusting device, the pressure adjusting device comprises an adjusting plate 26, the adjusting plate 26 is connected in the preset pressure cavity 15 in a sealing sliding manner, the second cylinder 13 is fixedly connected with a mounting pipe 27 communicated with the preset pressure cavity 15, the mounting pipe 27 is internally connected with a threaded rod 28 in a threaded manner, the threaded rod 28 is connected with the adjusting plate 26 in a rotating manner, one end of the threaded rod 28, far away from the adjusting plate 26, is fixedly connected with a knob, and the outer side wall of the knob is provided with anti-skid threads.
When the device is used, before sampling, the floating ball 21 is pressed, the baffle 19 moves downwards along the chute 18 until the baffle 19 completely blocks the communicating pipe 12, under the action of the pressure difference of the air pressure at two sides of the baffle 19, the friction resistance action is provided between the baffle 19 and the inner side wall of the chute 18, and because the pressure difference exists between the air pressure at two ends of the sealing column 29, namely, the pressure difference exists between the pressure balance cavity 23 and the preset pressure cavity 15, the friction resistance action is provided between the inner side wall of the empty slot on the sealing column 29 and the guide column 20, after the floating ball 21 is completely immersed in water, the buoyancy force borne by the floating ball 21 is smaller than the resultant force of the gravity of the baffle 19, the gravity of the guide column 20, the friction resistance of the guide column 20 by the empty slot and the friction resistance of the chute 18 to the baffle 19, and the buoyancy force borne by the floating ball 21 is larger than the resultant force of the gravity of the baffle, the gravity of the guide column, the gravity of the floating ball and the friction resistance of the chute 18 to the baffle 19, and the whole gravity is deviated, before the sampling is completed, the device ensures that the action direction of the buoyancy force borne by the floating ball 21 to the guide column 20 is upward;
after water is filled, the buoyancy of the whole device is smaller than gravity, the device begins to submerge, along with the lifting of the water filling depth, the movable plate 24 moves along the inner side wall of the pressure balance cavity 23 under the action of external water pressure, air in the third air cylinder 22 is extruded, so that the air pressure in the pressure balance cavity 23 is lifted to be consistent with the external water pressure, the sampling depth can be controlled by setting the air pressure in the preset pressure cavity 15 under the action of the air pressure in the water depth, along with the lifting of the air pressure in the pressure balance cavity 23, the pressure difference at the two ends of the sealing column 29 is smaller and smaller, so that the friction resistance of an empty groove to the guide column 20 is gradually reduced until the preset sampling depth is reached, the pressure at the two ends of the sealing column 29 is the same, and the friction resistance of the empty groove to the sealing column 20 is reduced to zero;
at this time, under the buoyancy action of the floating ball 21, the floating ball 21 drives the baffle 19, the guide post 20 and the floating ball 21 to move upwards along the chute 18 against the gravity and the friction resistance action of the chute 18 on the baffle 19, so that the baffle 19 no longer blocks the communicating pipe 12, high-pressure air in the pressure accumulation cavity 16 enters the buoyancy increasing cavity 2 through the communicating pipe 12, the sliding cylinder 3 stretches out of the buoyancy increasing cavity 2 against the water pressure action, the sliding cylinder 3 is driven to move rapidly by utilizing the high-pressure air accumulated in the pressure accumulation cavity 16, the sliding cylinder 3 drives the sampling cylinder 6 to move through the mounting ring 5, and thus the seawater sampling work on the water depth at the position is rapidly completed by means of the piston 11, the sampling cylinder 6, the sampling hole 8 and the sampling groove 7;
in the sampling process, along with the extension of the slide cylinder 3, the whole volume of the device is increased, the gravity is unchanged, the buoyancy is lifted, the increased buoyancy enables the whole buoyancy of the device to be greater than the gravity, so that after the sampling is finished, the device can automatically float upwards under the action of the buoyancy, and in the floating process, as the water pressure is reduced, the movable plate moves outwards along the pressure balance cavity, the whole buoyancy of the device is bigger and bigger, the floating speed is faster and faster, so that the device can be quickly floated on the water surface, the device does not need to be pulled up by a little by a rope, a great amount of time can be saved, the deep sampling work of ocean engineering is obviously promoted, and in order to conveniently find the device after floating, the positioning device can be arranged on the device, and a rope can be arranged on the device;
the control of the sampling water depth is realized by setting the air pressure in the preset pressure cavity 15, the air pressure in the preset pressure cavity 15 can be regulated by means of the regulating plate 26, the knob is only required to be screwed to drive the threaded rod 28 to rotate, and the regulating plate 26 is regulated to be at the position in the preset pressure cavity 15, so that the sampling depth can be simply and conveniently controlled and regulated, the sea water sampling work can be highly adapted to ocean engineering sea water sampling work, and the sea water sampling is rapidly and automatically performed after the device reaches the preset target water depth, and the vertical horse begins to float after the sampling is completed, so that the sampling precision is high, the use is very simple and convenient, and other redundant additional operations are not required.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. The utility model provides a sampling device with adjustable in marine engineering adopts sand water pollution prevention and cure, includes first cylinder (1), its characterized in that, be equipped with in first cylinder (1) and increase buoyancy chamber (2), increase buoyancy chamber (2) internal seal sliding connection has slide drum (3), fixedly connected with mounting panel (4) on one end that slide drum (3) kept away from first cylinder (1), fixedly connected with collar (5) on one lateral wall of mounting panel (4), fixedly connected with sampling tube (6) in collar (5), be equipped with sampling groove (7) in sampling tube (6), be equipped with sample hole (8) on the one end that sampling tube (6) is close to mounting panel (4), fixedly connected with supporting shoe (9) on one lateral wall that first cylinder (1) is close to sampling tube (6), fixedly connected with piston (11) on one end that bracing piece (10) are located sampling groove (7), piston (11) are located one end that sampling tube (7) is fixedly connected with piston (11), on one end that first cylinder (1) is kept away from on sealing connection first cylinder (12), the second cylinder (13) is internally and fixedly connected with a partition board (14), a preset pressure cavity (15) and an accumulation cavity (16) are respectively arranged in the second cylinder (13), the communication pipe (12) is used for communicating the buoyancy increasing cavity (2) with the accumulation cavity (16), a switch device is arranged on the communication pipe (12), a pressure balancing device is arranged on one side wall of the first cylinder (1), and a pressure adjusting device is arranged in the preset pressure cavity (15);
the switch device comprises a mounting block (17), wherein the mounting block (17) is arranged on a communicating pipe (12), a chute (18) is arranged in the mounting block (17), a baffle (19) is connected in a sliding manner in the chute (18), a guide post (20) penetrating through the mounting block (17) is fixedly connected to the baffle (19), a floating ball (21) is fixedly connected to the guide post (20), and the floating ball (21) is made of a light material;
the pressure balancing device comprises a third air cylinder (22), wherein the third air cylinder (22) is fixedly connected to one side wall, far away from the sampling tube (6), of the first air cylinder (1), a pressure balancing cavity (23) is arranged in the third air cylinder (22), a movable plate (24) is connected in the pressure balancing cavity (23) in a sealing sliding mode, a connecting pipe (25) is fixedly connected between the second air cylinder (13) and the third air cylinder (22), the connecting pipe (25) is used for communicating a preset pressure cavity (15) with the pressure balancing cavity (23), a through hole is formed in the connecting pipe (25), and the guide pillar (20) is connected in the two through holes in a sealing sliding mode;
the pressure adjusting device comprises an adjusting plate (26), the adjusting plate (26) is connected in a preset pressure cavity (15) in a sealing sliding mode, an installation pipe (27) communicated with the preset pressure cavity (15) is fixedly connected to the second air cylinder (13), a threaded rod (28) is connected to the installation pipe (27) in an internal threaded mode, and the threaded rod (28) is connected with the adjusting plate (26) in a rotating mode.
2. The adjustable sampling device for sand production water pollution prevention and control in ocean engineering according to claim 1, wherein a sealing column (29) is connected in the connecting pipe (25) in a sealing sliding manner, a hollow groove is formed in the sealing column (29), and the guide column (20) is connected in the hollow groove in a sealing sliding manner.
3. The adjustable sampling device for sand production water pollution control in ocean engineering according to claim 1, wherein a knob is fixedly connected to one end of the threaded rod (28) far away from the adjusting plate (26), and an anti-slip thread is arranged on the outer side wall of the knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211245263.XA CN115326481B (en) | 2022-10-12 | 2022-10-12 | Sampling device with adjustable in marine engineering adopts sand water pollution prevention and cure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211245263.XA CN115326481B (en) | 2022-10-12 | 2022-10-12 | Sampling device with adjustable in marine engineering adopts sand water pollution prevention and cure |
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| CN115326481A CN115326481A (en) | 2022-11-11 |
| CN115326481B true CN115326481B (en) | 2023-06-23 |
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| CN117136917B (en) * | 2023-08-29 | 2024-04-05 | 青岛海洋地质研究所 | Multitube siphon biological sampling device based on underwater vehicle |
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| JP3371297B2 (en) * | 1993-08-11 | 2003-01-27 | 財団法人シップ・アンド・オーシャン財団 | Automatic water sampling device and automatic water sampling method for deep sea water |
| CN104729880B (en) * | 2015-01-21 | 2017-06-13 | 浙江理工大学 | A kind of seabed water body spacing sampling equipment |
| CN212844493U (en) * | 2020-09-01 | 2021-03-30 | 重庆三峡学院 | Water quality sampling equipment for hydrology and water resource engineering |
| CN112082815A (en) * | 2020-09-10 | 2020-12-15 | 葛巍 | Automatic water sampling device for water pollution prevention and control |
| CN112268757A (en) * | 2020-11-25 | 2021-01-26 | 刘忠元 | Hydrology is quality of water sampling equipment for monitoring |
| CN114018643A (en) * | 2021-11-08 | 2022-02-08 | 管茶花 | Water pollution environment monitoring sampling device |
| CN217033211U (en) * | 2022-02-14 | 2022-07-22 | 威海德生技术检测有限公司 | Seawater analysis sampling device for marine environment detection |
| CN217331748U (en) * | 2022-02-17 | 2022-08-30 | 海南珊海海洋科技有限公司 | A sampling device for mariculture water quality testing |
| CN114577529A (en) * | 2022-03-28 | 2022-06-03 | 河南省科学院地理研究所 | Sampling device for measuring pollution source in chemical environment |
| CN217466354U (en) * | 2022-06-09 | 2022-09-20 | 海南中成检测技术有限公司 | Sewage sampling detection device |
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