CN111896316B - Water sampling device - Google Patents
Water sampling device Download PDFInfo
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- CN111896316B CN111896316B CN202010682448.1A CN202010682448A CN111896316B CN 111896316 B CN111896316 B CN 111896316B CN 202010682448 A CN202010682448 A CN 202010682448A CN 111896316 B CN111896316 B CN 111896316B
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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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- 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 aims to solve the defects in the prior art, and provides a layered sampling water sampling device, which solves the problem that water samples are polluted mutually during traditional water sampling to cause errors during subsequent water sample analysis; the bottom of the barrel body is provided with a driving shaft, a push rod and a rotating shaft, an incomplete bevel gear is arranged on the driving shaft, an incomplete round gear is sleeved on the driving shaft, teeth are arranged on the push rod and are meshed with the incomplete round gear, the lower end of the rotating shaft is provided with the bevel gear, a sampling bottle is arranged in the barrel body, the side wall of the barrel body is provided with a through hole capable of communicating with the outside, a first through hole is formed in one layer plate, a second through hole is formed in the other layer plate, and a sealing bottle cap is arranged on the second through hole; the invention has novel conception, adopts the mode of completely putting the water sampling device into water to directly perform water body sampling and respectively sealing, avoids the problem of mutual pollution of water samples during multilayer water sample sampling, and has smart structure and convenient use.
Description
Technical Field
The invention relates to the field of water quality monitoring, in particular to a water body sampling device.
Background
The water quality monitoring is a process for monitoring and measuring the types of pollutants in the water body, the concentrations and the variation trends of various pollutants and evaluating the water quality condition, as the river water on the ground surface, the river water in the lake and the like are controlled by the landform of the river channel and different supply sources, the river water forms obvious physical and chemical properties from the surface of the river to the bottom of the river water, therefore, water samples with different depths are required to be collected to accurately monitor the water quality at the position, the existing water sample collector mainly uses a water pumping valve to pump water bodies with different levels into a water collecting bottle, the sampling device is very troublesome to carry, and when water is pumped, the water body is stirred and is turbid, so that the collected water sample is not accurate, meanwhile, the water body passes through the same water collecting pipeline when being sucked into the water collecting bottle at each time, so that the water bodies are polluted mutually, the water body in the water collecting bottle is impure, and errors are brought to later-stage water sample test analysis.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a water body sampling device capable of sampling in a layered mode. Above-mentioned setting has been solved when traditional water collection water sample and has been polluted each other, produces the problem of error when leading to follow-up water sample analysis.
The technical scheme for solving the problem is that the device comprises a vertically-placed barrel body, wherein a bottom plate, a first-layer plate, a second-layer plate, a third-layer plate and a cover plate are respectively fixed in the barrel body from bottom to top, a transmission cavity is formed between the bottom plate and the first-layer plate, a water collection cavity is formed between the first-layer plate and the second-layer plate, a storage cavity is formed between the second-layer plate and the third-layer plate, and an elastic part is fixed between the third-layer plate and the cover plate; a driving shaft is horizontally arranged in the transmission cavity, an incomplete bevel gear which has the same axis as the driving shaft is sleeved on the middle section of the driving shaft, an incomplete circular gear which has the same axis as the driving shaft is sleeved on one end of the driving shaft, and the other end of the driving shaft is a driving end; a vertically arranged push rod is arranged in the transmission cavity, teeth are arranged on one side of the push rod and can be meshed with the incomplete circular gear, a vertically arranged rotating shaft is further arranged in the transmission cavity, the upper end of the rotating shaft penetrates through the first layer plate and is fixed on the second layer plate, the rotating shaft can drive the first layer plate and the second layer plate to rotate through rotation, a bevel gear is fixed at the lower end of the rotating shaft and can be meshed with the incomplete bevel gear; a plurality of sampling bottles are uniformly distributed on the circumference in the water sampling cavity, through holes which can be communicated with the outside are formed in the side wall of the barrel body in the water sampling cavity, sleeves are sleeved outside the sampling bottles, and the lower ends of the sleeves are fixed on a laminate; a plurality of first through holes allowing the push rod to penetrate are formed in one layer plate, a plurality of second through holes allowing the sampling bottle to penetrate are formed in the two layer plates, the first through holes correspond to the second through holes in a one-to-one mode, sealing bottle caps are arranged on the second through holes, when the sealing bottle caps are not pushed by the sampling bottle, materials between the water collecting cavity and the storage cavity can not be communicated, fan-shaped rubber sealing gaskets are arranged on the lower end faces of the two layer plates, and the rubber sealing gaskets are fixed on the inner wall of the barrel body.
Has the beneficial effects that:
1. the water sampling device is completely arranged in water, water body collection is directly carried out, and the water body collection and the water body separation are sealed, so that the problem of mutual pollution of water samples during multilayer water sample collection is avoided, the structure is ingenious, and the use is convenient; the barrel body can be sampled by only arranging one opening, and the sampling can be carried out respectively in a rotating mode, so that the overall size of the device can be reduced, and the problem that an internal sampling bottle falls off and is lost can be avoided;
2. the rotation and the pushing actions are completed by one motor, so that the push rod is matched with a rotating layer plate to complete the sampling and sealing actions of the sampling bottle, and the device has high synchronization rate, low cost and convenient maintenance;
3. the rubber sealing gasket is arranged to ensure the sealing performance of the rest sampling bottles, so that the rest sampling bottles are not polluted;
4. the three-layer plate can press the sealing bottle cap under the action of water pressure and the elastic part, and the sealing bottle cap is matched with the wedge block at the bottom of the sampling bottle, so that the sealing bottle cap is tightly covered on the sampling bottle, the water sample in the sampling bottle is prevented from leaking, the environment is fully utilized, the cost is low, and the reliability is high.
Drawings
FIG. 1 is a front cross-sectional view of the present invention collecting a first bottle of water sample;
FIG. 2 is a side cross-sectional view of the present invention collecting a second bottle of water sample;
FIG. 3 is a three-dimensional perspective view of the present invention;
FIG. 4 is an enlarged view taken at A of FIG. 1;
fig. 5 is a view from direction B-B of fig. 1.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in the attached figures 1-5, the invention comprises a barrel body 1, a bottom plate 2, a first layer plate 3, a second layer plate 4, a third layer plate 5 and a cover plate 6 are respectively arranged in the barrel body 1 from bottom to top, the bottom plate 2 is fixed at the bottom of the barrel body 1, a transmission cavity 7 is formed between the bottom plate 2 and the first layer plate 3, a water collecting cavity 8 is formed between the first layer plate 3 and the second layer plate 4, a storage cavity 9 is formed between the second layer plate 4 and the third layer plate 5, and an elastic part 27 is fixed between the third layer plate 5 and the cover plate 6;
a plurality of sampling bottles 20 are uniformly distributed on the inner circumference of the water sampling cavity 8, a through hole capable of communicating with the outside is formed in the side wall of the barrel body 1 in the water sampling cavity 8, a pushing mechanism and a rotating mechanism are arranged in the transmission cavity 7, the pushing mechanism can push the sampling bottles 20 from the water sampling cavity 8 to the storage cavity 9, and the rotating mechanism can control the first layer plate 3 and the second layer plate 4 to coaxially rotate; a plurality of first through holes 28 allowing the pushing mechanism to pass through are formed in the first layer plate 3, a plurality of second through holes 29 allowing the sampling bottles 20 to pass through are formed in the second layer plate 4, the first through holes 28 and the second through holes 29 are in one-to-one correspondence, and the relative positions are kept unchanged;
a sleeve 21 capable of limiting the sampling bottle 20 is fixed on the first layer plate 3, a rubber sealing gasket 23 fixed in the barrel body 1 is arranged below the second layer plate 4, a through hole matched with the sampling bottle 20 is formed in the rubber sealing gasket 23, at most one sampling bottle 20 can only circulate with the outside at the same time, and the openings of the rest sampling bottles 20 in the water sampling cavity 8 are sealed by the rubber sealing gasket 23;
the upper end of the second through hole 29 is provided with a sealing bottle cap 24 which can seal the sampling bottle 20, the lower end surface of the outer side of the sealing bottle cap 24 is provided with a rubber wedge 22, and the two layer plates 4 are provided with wedge holes matched with the rubber wedge 22, so that the sealing bottle cap 24 can be fixed on the two layer plates 4 to isolate the sampling cavity 8 from the storage cavity 9; when the sampling bottle 20 moves from the water sampling cavity 8 to the storage cavity 9 under the action of the pushing mechanism, the sealing bottle cap 24 is pushed open, so that the sealing bottle cap 24 is tightly covered on the opening at the top end of the sampling bottle 20;
the pushing mechanism comprises a driving shaft 16 and a push rod 10, wherein the driving shaft 16 is horizontally arranged, the push rod 10 is vertically arranged, an incomplete bevel gear 17 which has the same axis with the driving shaft 16 is sleeved at the middle section of the driving shaft 16, an incomplete circular gear 13 which has the same axis with the driving shaft 16 is sleeved at one end of the driving shaft 16, the other end of the driving shaft 16 is a driving end, one side of the push rod 10 is provided with teeth 11, and the teeth 11 can be meshed with the incomplete circular gear 13; the rotating mechanism comprises a rotating shaft 19 which is vertically arranged, the upper end of the rotating shaft 19 penetrates through the first layer plate 3 and is fixed on the second layer plate 4, the rotating shaft 19 can drive the first layer plate 3 and the second layer plate 4 to rotate, a bevel gear 18 is fixed at the lower end of the rotating shaft 19, and the bevel gear 18 can be meshed with an incomplete bevel gear 17; the pushing mechanism can be matched with the rotating mechanism, and two groups of actions of pushing and rotating are completed through one driving end.
The first through hole 28 is internally provided with a one-way water-blocking sheet, the push rod 10 can push the one-way water-blocking sheet to pass through the first through hole 28, and when the push rod 10 is separated from the first through hole 28, the one-way water-blocking sheet can prevent water from entering the transmission cavity 7. As an embodiment, the one-way water-blocking sheet can be selected as an elastic rubber ring, when the push rod 10 passes through the rubber ring, the rubber ring is stretched to be tightly attached to the push rod 10, the sealing performance is ensured, and water is prevented from entering the transmission cavity 7; when the push rod 10 is separated from the rubber ring, the rubber ring is restored to the original state, the first through hole 28 is closed, and water is prevented from entering the transmission cavity 7.
Under the matching of the cover plate 6 and the two-layer plate 4, the storage cavity 9 can be regarded as a closed space, and when a water sample is taken, the cover plate 6 can move towards the two-layer plate 4 under the action of water pressure; when the sampling bottle 20 moves to the storage cavity 9, the three-layer plate 5 presses the sealing bottle cap 24 under the action of the cover plate 6 and the elastic member 27, and cooperates with the wedge 34 at the bottom of the sampling bottle 20, so that the sealing bottle cap 24 tightly covers the sampling bottle 20, and the water sample in the sampling bottle 20 is prevented from leaking. Bolts 31 located above the cover plate 6 are evenly distributed on the side wall of the barrel body 1 in the circumferential direction, and the bolts 31 can limit the cover plate 6 to be separated from the barrel body 1. A handle 30 is fixed on the top of the cover plate 6.
In order to prevent the water body communication between the storage cavity 9 and the water collection cavity 8, the lower end surface of the outer side of the sealing bottle cap 24 is provided with a rubber wedge 22, and the two-layer plate 4 is provided with a wedge hole matched with the rubber wedge 22; when the sampling bottle 20 is not pushed upwards, the rubber wedge 22 is not separated from the wedge hole on the two-layer plate 4.
In order to reduce the volume of the device and simultaneously enable the push rod 10 to be vertical, the lower end of the push rod 10 penetrates through the bottom plate 2 and extends downwards, a push rod base 12 is fixed at the bottom of the push rod 10, and the push rod base 12 is larger than a through hole which is formed in the bottom plate 2 and used for enabling the push rod 10 to extend downwards; because the lower end of the push rod 10 can be stabilized below the bottom plate 2 when the push rod 10 does not move upwards, the height of the transmission cavity 7 can be only slightly higher than that of the water collecting cavity 8, and when the push rod 10 moves upwards and downwards, the bottom of the push rod 10 cannot enter the transmission cavity 7.
A first spring 25 is fixed on the push rod, and the lower end of the first spring 25 is fixed on the upper end surface of the bottom plate 2; when the incomplete circular gear 13 is not engaged with the teeth 11, the push rod 10 can be held at the lowest position.
To enable rotation of the drive shaft 16, a servomotor 32 is fixed to the drive end of the drive shaft 16.
In order to prevent the water flow in the water sampling cavity 8 from entering the storage cavity 9 through the second through hole 29 after the sampling bottle 20 enters the storage cavity 9, the bottom of the sampling bottle 20 is coated with a rubber layer; the rubber layer covering the bottom of the sampling bottle 20 closes the second through-hole 29 after the sampling bottle 20 enters the storage chamber 9.
In order to make the sampling bottle 20 more stable and not fall back to the water production cavity 8 after entering the storage cavity 9, blind holes 33 are evenly distributed on the side wall of the second through hole 29, a wedge 34 is arranged in each blind hole 33, a second spring 26 is fixed on each wedge 34, and the other end of each second spring 26 is fixed at the bottom of the blind hole 33; when the sampling bottle 20 moves upwards, the wedge 34 is squeezed to move towards the bottom of the blind hole 33, after the sampling bottle 20 completely moves to the storage cavity 9, the restoring force of the second spring 26 enables the wedge 34 to extend outwards away from the bottom of the blind hole 33, finally, the upper end face of the wedge 34 is attached to the bottom of the sampling bottle 20, and the wedge 34 can stably support the bottom of the sampling bottle 20, so that the sampling bottle 20 cannot move downwards.
Setting that three bottles are required to be collected for water collection at this time, namely a bottom water body, a middle water body and a surface water body, fixing three sampling bottles 20 in a water collection cavity 8, and setting a vacant point, wherein the three sampling bottles 20 and the vacant point are uniformly distributed around the circumference of a rotating shaft 19, before the device is put down, the vacant point is positioned at a gap of a fan-shaped rubber sealing gasket 23, a collection person ties a rope with scales on a handle, and sets a servo motor 32 to rotate for one circle every 5 minutes; when specifically using, at first sink this device into aquatic until the bottom, wait for 5 minutes after, servo motor 32 slowly rotates the round, and this round has three processes: 1. the incomplete circular gear 13 idles, the incomplete bevel gear 17 is meshed with the bevel gear 18 to drive the rotating shaft 19 to rotate for a quarter of a turn: rotating a sampling bottle 20 on the first laminate 3 to the opening of the fan-shaped rubber sealing gasket 23, exchanging with the external water body for water sample collection, simultaneously rotating the second laminate 4, and rotating a second through hole 29 allowing the sampling bottle 20 to pass through to the upper part of the opening of the fan-shaped rubber sealing gasket 23; 2. the incomplete circular gear 13 continuously idles, the incomplete bevel gear 17 idles, and a water sample collection process is performed at the moment; 3. the incomplete circular gear 13 is meshed with the teeth 11 to rotate, and the incomplete bevel gear 17 idles: the incomplete circular gear 13 is meshed with the teeth 11 on the push rod 10 to drive the push rod 10 to move upwards, the upper end of the push rod 10 sends a sampling bottle 20 into the storage cavity 9, and under the action of the first spring 25, the push rod 10 can move downwards to restore the original shape after sending the sampling bottle 20 into the storage cavity 9; then the servo motor 32 stops rotating, the water sample collecting personnel uses the rope to pull the cylinder upwards to the next water layer of the water body to be collected, and the actions are repeated to collect water.
It should be noted that, in order to enable the servo motor 32 and the driving shaft 16 to be driven stably, the transmission chamber 7 is provided with a base 14 horizontally fixed on the barrel body 1, the servo motor 32 is fixed on the base 14, and the base 14 is provided with a base bracket 15 for supporting the driving shaft 16, so that the driving shaft 16 can be kept horizontally, and in order to enable the device to be kept vertically, the bottom of the barrel body 1 is fixed with a balancing weight, so that the barrel body can be sunk against the buoyancy of water while being kept vertically.
The invention has novel conception, adopts the mode of completely putting the water sampling device into water to directly perform water body sampling and respectively sealing, avoids the problem of mutual pollution of water samples during multilayer water sample sampling, and has smart structure and convenient use.
Claims (9)
1. The utility model provides a water sampling device, includes the staving, its characterized in that: a bottom plate, a first layer plate, a second layer plate, a third layer plate and a cover plate are respectively arranged in the barrel body from bottom to top, the bottom plate is fixed at the bottom of the barrel body, a transmission cavity is formed between the bottom plate and the first layer plate, a water sampling cavity is formed between the first layer plate and the second layer plate, a storage cavity is formed between the second layer plate and the third layer plate, and an elastic part is fixed between the third layer plate and the cover plate;
a plurality of sampling bottles are uniformly distributed on the circumference in the water sampling cavity, through holes capable of communicating with the outside are formed in the side wall of the barrel body in the water sampling cavity, a pushing mechanism and a rotating mechanism are arranged in the transmission cavity, the pushing mechanism can push the sampling bottles from the water sampling cavity to the storage cavity, and the rotating mechanism can control the first layer plate and the second layer plate to coaxially rotate; a plurality of first through holes allowing the pushing mechanism to pass through are formed in the first layer plate, a plurality of second through holes allowing the sampling bottles to pass through are formed in the second layer plate, the first through holes and the second through holes are in one-to-one correspondence, and the relative positions are kept unchanged;
a sleeve capable of limiting the sampling bottle is fixed on the first laminate, a rubber sealing gasket fixed in the barrel body is arranged below the second laminate, a through hole matched with the sampling bottle is formed in the rubber sealing gasket, at most one sampling bottle can only be communicated with the outside in the same time, and openings of the rest sampling bottles in the water sampling cavity are sealed by the rubber sealing gasket;
a sealing bottle cap capable of sealing the sampling bottle is arranged at the upper end of the second through hole, a rubber wedge block is arranged on the lower end face of the outer side of the sealing bottle cap, and wedge block holes matched with the rubber wedge block are formed in the two layer plates, so that the sealing bottle cap can be fixed on the two layer plates to isolate the sampling cavity from the storage cavity; when the sampling bottle moves from the water sampling cavity to the storage cavity under the action of the pushing mechanism, the sealing bottle cap is pushed open, so that the sealing bottle cap is tightly covered on the opening at the top end of the sampling bottle;
blind holes are uniformly distributed on the side wall of the second through hole in the circumferential direction, a wedge block is arranged in each blind hole, a second spring is fixed on each wedge block, and the other end of each second spring is fixed at the bottom of each blind hole; the sampling bottle can extrude the wedge block to move towards the bottom of the blind hole when moving upwards, after the sampling bottle completely moves to the storage cavity, the restoring force of the second spring enables the wedge block to extend outwards away from the bottom of the blind hole, and finally the upper end face of the wedge block is attached to the bottom of the sampling bottle, so that the sampling bottle cannot move downwards;
the pushing mechanism comprises a driving shaft and a push rod, the driving shaft is horizontally arranged, the push rod is vertically arranged, an incomplete bevel gear which has the same axis with the driving shaft is sleeved at the middle section of the driving shaft, an incomplete circular gear which has the same axis with the driving shaft is sleeved at one end of the driving shaft, the other end of the driving shaft is a driving end, and teeth are arranged on one side of the push rod and can be meshed with the incomplete circular gear; the rotating mechanism comprises a vertically arranged rotating shaft, the upper end of the rotating shaft penetrates through the first layer plate and is fixed on the second layer plate, the rotating shaft can drive the first layer plate and the second layer plate to rotate, a bevel gear is fixed at the lower end of the rotating shaft, and the bevel gear can be meshed with an incomplete bevel gear; the pushing mechanism can be matched with the rotating mechanism, and two groups of actions of pushing and rotating are completed through one driving end.
2. The water sampling device of claim 1, wherein: the lower end of the push rod penetrates through the bottom plate and extends downwards, a push rod base is fixed at the bottom of the push rod, and the push rod base is larger than a through hole which is formed in the bottom plate and used for the push rod to extend downwards.
3. The water sampling device of claim 1, wherein: a first spring is fixed on the push rod, and the lower end of the first spring is fixed on the upper end face of the bottom plate.
4. The water sampling device of claim 1, wherein: and a servo motor is fixed at the driving end of the driving shaft.
5. The water sampling device of claim 1, wherein: the one-way water-blocking sheet is arranged in the first through hole, the push rod can push the one-way water-blocking sheet to pass through the first through hole, and when the push rod is separated from the first through hole, the one-way water-blocking sheet can prevent water from entering the transmission cavity.
6. The water sampling device of claim 1, wherein: the bottom of the sampling bottle is coated with a rubber layer.
7. The water sampling device of claim 1, wherein: under the matching of the cover plate and the two-layer plate, the storage cavity can be regarded as a closed space, and the cover plate can move towards the two-layer plate under the action of water pressure when a water sample is taken; when the sampling bottle moves to the storage cavity, the three-layer plate can press the sealing bottle cap under the action of the cover plate and the elastic piece, and the sealing bottle cap is matched with the wedge block at the bottom of the sampling bottle, so that the sealing bottle cap tightly covers the sampling bottle, and a water sample in the sampling bottle is prevented from leaking.
8. The water sampling device of claim 1, wherein: bolts located above the cover plate are evenly distributed on the side wall of the barrel body in the circumferential direction, and the cover plate can be limited by the bolts to be separated from the barrel body.
9. The water sampling device of claim 1, wherein: the top of the cover plate is fixed with a handle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010682448.1A CN111896316B (en) | 2020-07-15 | 2020-07-15 | Water sampling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010682448.1A CN111896316B (en) | 2020-07-15 | 2020-07-15 | Water sampling device |
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| CN111896316A CN111896316A (en) | 2020-11-06 |
| CN111896316B true CN111896316B (en) | 2022-09-27 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115307980B (en) * | 2022-09-13 | 2023-05-26 | 乐新检测技术有限公司 | Multi-depth water body sampler |
| CN116242667B (en) * | 2023-05-12 | 2023-07-21 | 北京沃太斯环保科技发展有限公司 | Underground water layered sampling and layered repairing device |
| CN116990077B (en) * | 2023-08-03 | 2024-02-20 | 宁夏回族自治区食品检测研究院 | Multilayer water sample collector and water sample collection method |
| CN117030368B (en) * | 2023-10-09 | 2024-01-19 | 中铁建工集团有限公司 | Triaxial cement mixing pile cement soil slurry sampler |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341690A (en) * | 1989-10-13 | 1994-08-30 | Isco, Inc. | Composite wastewater sampler |
| KR20140147608A (en) * | 2013-06-20 | 2014-12-30 | 한국해양과학기술원 | Holder for fixing sample bottle of time series sediment trap |
| CN106932224B (en) * | 2017-01-18 | 2019-10-08 | 何银亚 | A kind of water sample acquisition device with Huan Guan mechanism |
| CN107389378B (en) * | 2017-06-30 | 2019-09-10 | 扬州大学 | A kind of water sample acquisition device based on remote underwater robot |
| CN109470523B (en) * | 2018-12-29 | 2021-02-19 | 海安睿华纺织科技有限公司 | Water body layered sampling device |
| CN109632393B (en) * | 2019-02-28 | 2021-08-20 | 山东中成环境技术服务有限公司 | Automatic water sampling device |
| CN109883762B (en) * | 2019-03-19 | 2020-07-31 | 福建师范大学福清分校 | Seawater collecting device and collecting method thereof |
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