CN115326491B - Layered water body sampler for water environment detection - Google Patents
Layered water body sampler for water environment detection Download PDFInfo
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- CN115326491B CN115326491B CN202211065777.7A CN202211065777A CN115326491B CN 115326491 B CN115326491 B CN 115326491B CN 202211065777 A CN202211065777 A CN 202211065777A CN 115326491 B CN115326491 B CN 115326491B
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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
- G01N1/16—Devices for withdrawing samples in the liquid or fluent state with provision for intake at several levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
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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
Aiming at the defects that the water sampling depth of the existing water sampling device cannot be adjusted and the water sample is inconvenient to take out, the invention provides a layered water sampling device for water environment detection, which belongs to the technical field of water sampling devices and comprises a vertical pipe, wherein an aeration nozzle and a rail are arranged on the vertical pipe; a plurality of longitudinally distributed water sampling containers are detachably arranged on the vertical pipe, and the water sampling containers are fixedly connected with ventilation interfaces; the water sampling container is also provided with a water inlet nozzle, a first valve is arranged on the water inlet nozzle, a hose is detachably connected to the outer end of the water inlet nozzle, a water inlet head which is arranged on the track in a sliding manner is connected to the hose, a second valve is arranged on the water inlet head, and a transmission mechanism is also arranged on the vertical pipe; and the vertical pipe is also provided with air outlets higher than all the water sampling containers and the water inlet heads. The invention is provided with the water inlet head with adjustable height, and the arranged water sampling container is detachably connected, so that not only can the adjustment of the water sampling depth be realized, but also the taking out of the water sample can be facilitated.
Description
Technical Field
The invention belongs to the technical field of water sampling devices, and particularly relates to a layered water body sampler for water environment detection.
Background
The water environment refers to the environment in which water is formed, distributed and transformed in the natural world. When the water environment needs to be treated, the water body needs to be sampled and analyzed firstly, a plurality of sampling cavities with different heights are generally arranged for realizing layered sampling of the water body, the water body with different depths sometimes needs to be sampled under different conditions, in the existing layered water body sampler, the sampling container is generally fixedly arranged, the sampling depth of the water body cannot be adjusted, such as a CN handle 4894552A, the name is a layered water body sampling device for water environment detection, a plurality of sampling boxes in the water body sampling device are fixedly arranged, the relative heights cannot be adjusted, and the water body sample is inconvenient to take out after sampling.
Disclosure of Invention
Aiming at the defects that the water sampling depth of the existing water sampling device cannot be adjusted and the water sample is inconvenient to take out, the invention provides a layered water sampler for water environment detection, which is provided with a water inlet head capable of adjusting the height, and the arranged water sampling containers are detachably connected, so that the water sampling depth can be adjusted, and the water sample can be taken out conveniently.
The invention aims at realizing the following technical scheme: the layered water body sampler for water environment detection comprises a vertical standpipe which is of a hollow tubular structure, wherein a plurality of ventilation nozzles which are distributed along the length direction of the standpipe and are communicated with the inner cavity of the standpipe are fixedly arranged on the standpipe, and a track which is arranged along the length direction of the standpipe is also fixedly arranged on the standpipe;
the vertical pipe is detachably provided with a plurality of water sampling containers which are longitudinally distributed, the upper part of the inner cavity of the water sampling container is of a conical structure which is gradually reduced from bottom to top, a floating ball is arranged in the water sampling container, the water sampling container is fixedly connected with a ventilation interface which is communicated with the upper end of the inner cavity of the water sampling container, the outer end of the ventilation interface is fixedly connected with an elastic ring, the ventilation interfaces are in one-to-one correspondence with the ventilation nozzles, and when the water sampling container is arranged on the vertical pipe, the ventilation nozzles stretch the elastic rings and are inserted into the corresponding ventilation interfaces; the water sampling container is also fixedly connected with a water inlet nozzle, a first valve for controlling the water inlet nozzle to be opened and closed is arranged on the water inlet nozzle, a hose is detachably connected to the outer end of the water inlet nozzle, the end part of the hose, which is opposite to the water inlet nozzle, is connected with a water inlet head which is arranged on a track in a sliding manner, a locking piece capable of locking the water inlet head on the track is arranged on the water inlet head, a second valve for controlling the water inlet head to be opened and closed is arranged on the water inlet head, and a transmission mechanism for driving the second valve to be opened and closed is also arranged on the vertical pipe; the upper end of the vertical pipe is fixedly connected with a handle, a handle for controlling the transmission mechanism is arranged beside the handle, and an air outlet higher than all the water sampling containers and the water inlet head is also arranged on the vertical pipe.
In the water body sampler, the water body sampling container is communicated with the water inlet head for water body sampling, and the height of the water inlet head is adjustable, so that the adjustment of the water body sampling depth can be realized. Along with the increase of the water sample in the water sampling container, the floating ball in the water sampling container floats and seals the upper end of the inner cavity of the water sampling container, so that the external water sample can not continuously enter the water sampling container, and the automatic stop of sampling is realized. The water sampling container is detachably arranged on the vertical pipe, and when the water sample needs to be taken out, the water sampling container is only required to be detached for operation, so that the water sampling container is more convenient.
Preferably, an air pump is fixedly arranged on the vertical pipe at the position of the air outlet.
Preferably, the vertical pipe is further fixedly provided with a floating plate positioned below the air pump, the track is further provided with scale marks arranged along the length direction of the track, and zero scales of the scale marks are flush with the lower end surface of the floating plate.
Preferably, the second valve comprises a flip cover rotatably arranged on the water inlet head, a plug capable of sealing the outer end of the water inlet head is fixedly arranged on the inner side surface of the flip cover, and a torsion spring capable of driving the flip cover to rotate and enabling the plug to be tightly pressed on the outer end of the water inlet head is arranged at the rotating connection part of the flip cover and the water inlet head.
Preferably, the transmission mechanism comprises a mounting frame fixed on the vertical pipe, a pull rod is arranged on the mounting frame in a sliding manner, the sliding direction of the pull rod is parallel to the length direction of the vertical pipe, a reset spring for resetting the pull rod is arranged between the pull rod and the mounting frame, a pull rope is fixedly connected to the flip cover, and a fixing buckle capable of being clamped and fixed at any height of the pull rod is fixedly connected to the upper end of the pull rope; the upper end of the pull rod is fixedly connected with the handle.
Preferably, the fixing buckle comprises two semi-buckles of arc structures hinged with each other, the inner side faces of the semi-buckles are fixedly provided with anti-slip pads, and the two semi-buckles are clamped with each other back to the side edges of the hinged positions.
Preferably, a suspension cavity is further arranged in the water body sampling container near the upper end.
Preferably, two ends of the hose are respectively and tightly sleeved on the water inlet nozzle and the water inlet head.
Preferably, the vertical pipe is fixedly provided with a clamping piece with a circular arc structure, the central angle of the clamping piece is larger than 180 degrees, the water sampling container is of a cylindrical structure, the outer side surface of the water sampling container is provided with a groove with a circular ring structure, the water sampling container is embedded into the clamping piece, the clamping piece is positioned in the groove, and the upper end of the clamping piece is attached to the upper wall of the groove; the ventilation mouth is vertically arranged on the side face of the vertical pipe, and the ventilation mouth is transversely inserted into the ventilation interface.
Preferably, the lower end of the vertical pipe is provided with a water outlet, and the lower end of the vertical pipe is also connected with a bottom cover which can seal the water outlet in a threaded manner.
Compared with the prior art, the invention has the following beneficial effects: the invention can be used for adjusting the depth of water sampling, can be used for carrying out layered water sampling, can automatically stop sampling when the water sample in the water sampling container is full, can be detached after sampling, and is convenient for processing the collected water sample.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a perspective view of a water intake head;
FIG. 4 is a perspective view of a water sampling vessel;
FIG. 5 is a top view of a water sampling vessel;
FIG. 6 is a cross-sectional view taken at B-B in FIG. 5;
FIG. 7 is a perspective view of the retaining buckle;
the marks in the figure: 1. standpipe, 2, aeration nozzle, 3, track, 4, handle, 5, water sampling container, 6, joint piece, 7, recess, 8, floater, 9, aeration interface, 10, elastic ring, 11, suspension chamber, 12, water inlet nozzle, 13, first valve, 14, hose, 15, water inlet head, 16, retaining member, 18, second valve, 19, flip, 20, end cap, 21, drive mechanism, 22, mounting bracket, 23, pull rod, 24, return spring, 25, stay cord, 26, fixed knot, 27, half knot, 28, non-slip mat, 29, handle, 30, aspiration pump, 31, floating plate, 32, bottom.
Detailed Description
The invention is further described below with reference to embodiments shown in the drawings in which:
example 1
As shown in fig. 1-7, a layered water body sampler for water environment detection comprises a vertical standpipe 1 which is vertically arranged and has a hollow tubular structure, three ventilation nozzles 2 which are distributed along the length direction of the standpipe 1 and are communicated with the inner cavity of the standpipe 1 are fixedly arranged on the standpipe 1, the ventilation nozzles 2 are vertically arranged on the side surface of the standpipe 1, and a track 3 which is arranged along the length direction of the standpipe 1 is also fixedly arranged on the standpipe 1; the upper end of the vertical pipe 1 is fixedly connected with a handle 4.
The vertical pipe 1 is detachably provided with three water sampling containers 5 which are longitudinally distributed, the vertical pipe 1 is fixedly provided with a clamping piece 6 with a circular arc-shaped structure, the central angle of the clamping piece 6 is larger than 180 degrees, the water sampling container 5 is of a cylindrical structure, the outer side surface of the water sampling container 5 is provided with a groove 7 with a circular ring-shaped structure, the water sampling container 5 is embedded into the clamping piece 6, the clamping piece 6 is positioned in the groove 7, and the upper end of the clamping piece 6 is attached to the upper wall of the groove 7.
The upper portion of the inner cavity of the water body sampling container 5 is of a conical structure which gradually reduces from bottom to top, a floating ball 8 is arranged in the water body sampling container 5, a ventilation interface 9 communicated with the upper end of the inner cavity of the water body sampling container 5 is fixedly connected to the water body sampling container 5, an elastic ring 10 is fixedly connected to the outer end of the ventilation interface 9, the ventilation interfaces 9 and the ventilation nozzles 2 are in one-to-one correspondence, when the water body sampling container 5 is installed on the vertical pipe 1, the ventilation nozzles 2 stretch out the elastic ring 10 and transversely insert into the corresponding ventilation interfaces 9, and the connection sealing performance between the ventilation nozzles 2 and the ventilation interfaces 9 can be enhanced through the arrangement of the elastic ring 10. A suspension cavity 11 is further arranged in the water sampling container 5 near the upper end.
The water sampling container 5 is fixedly connected with a water inlet nozzle 12, the water inlet nozzle 12 is provided with a first valve 13 for controlling the water inlet nozzle 12 to be opened and closed, the outer end of the water inlet nozzle 12 is detachably connected with a hose 14, the end part of the hose 14, which is opposite to the water inlet nozzle 12, is connected with a water inlet head 15 which is arranged on the track 3 in a sliding manner, two ends of the hose 14 are respectively and tightly sleeved on the water inlet nozzle 12 and the water inlet head 15, namely, two ends of the hose 14 are respectively in interference fit with the water inlet nozzle 12 and the water inlet head 15.
The water inlet head 15 is provided with a locking piece 16 which can lock the water inlet head 15 on the track 3, and the locking piece 16 is a bolt which is in threaded connection with the water inlet head 15 and can be tightly pressed on the track 3. The second valve 18 for controlling the water inlet head 15 to be opened and closed is arranged on the water inlet head 15, the second valve 18 comprises a turnover cover 19 rotatably arranged on the water inlet head 15, a plug 20 capable of sealing the outer end of the water inlet head 15 is fixedly arranged on the inner side surface of the turnover cover 19, and a torsion spring capable of driving the turnover cover 19 to rotate and enabling the plug 20 to be tightly pressed on the outer end of the water inlet head 15 is arranged at the rotary connection part of the turnover cover 19 and the water inlet head 15. The vertical pipe 1 is further provided with a transmission mechanism 21 for driving the second valve 18 to open and close, the transmission mechanism 21 comprises a mounting frame 22 fixed on the vertical pipe 1, a pull rod 23 is arranged on the mounting frame 22 in a sliding mode, the sliding direction of the pull rod 23 is parallel to the length direction of the vertical pipe, a reset spring 24 for resetting the pull rod 23 is arranged between the pull rod 23 and the mounting frame 22, a pull rope 25 is fixedly connected to the flip 19, the pull rope 25 is made of stainless steel wires, the upper end of the pull rope 25 is fixedly connected with a fixing buckle 26 capable of being clamped and fixed at any height of the pull rod 23, the fixing buckle 26 comprises two semi-buckles 27 in a mutually hinged arc-shaped structure, anti-slip pads 28 are fixedly arranged on the inner side faces of the semi-buckles 27, and the two semi-buckles 27 are clamped with each other between the side edges of the mutually hinged positions. The upper end of the pull rod 23 is fixedly connected with a handle 29, and the handle 29 is positioned beside the grip 4.
The vertical pipe 1 is also provided with air outlets higher than all the water sampling containers 5 and the water inlet head 15. And an air pump 30 is fixedly arranged on the vertical pipe 1 at the air outlet position. The vertical pipe 1 is also fixedly provided with a floating plate 31 positioned below the air pump 30, the track 3 is also provided with scale marks arranged along the length direction of the track 3, and zero scales of the scale marks are flush with the lower end surface of the floating plate 31. The air pump 30 is powered by a power line or a storage battery, and in order to facilitate the use of the air pump 30, the storage battery is preferably used for power supply.
The lower end of the vertical pipe 1 is provided with a water outlet, and the lower end of the vertical pipe 1 is also connected with a bottom cover 32 which can seal the water outlet in a screw connection manner.
The application principle of the invention is as follows:
when the invention is used for sampling water, the water sampling container 5 is firstly embedded into the corresponding clamping piece 6, the aeration nozzle 2 is inserted into the corresponding aeration interface 9, the first valve 13 is opened, then the hose 14 is used for connecting the water inlet nozzle 12 and the water inlet head 15, the locking piece 16 is unscrewed, the water inlet head 15 is pushed to slide along the track 3 by observing the scale marks on the vertical pipe 1 so as to adjust the height of the water inlet head 15, the locking piece 16 is screwed again so as to lock the water inlet head 15 on the track 3, and then the fixing buckle 26 is clamped and fixed on the pull rod 23 so as to enable the pull rope 25 to be in a tensioning state. The layered water body sampler can be used for sampling water body at this time. The layered water body sampler stretches into water, the floating plate 31 is positioned on the water surface, the handle 29 is pulled, the handle 29 drives the pull rod 23 to move upwards, the pull rope 25 is driven to move upwards through the fixing buckle 26, the flip 19 is driven to turn upwards, the plug 20 is used for releasing the sealing of the water inlet head 15, the air pump 30 is opened at the moment, the air pump 30 can pump air in the inner cavity of the vertical pipe 1, the negative pressure is formed in the vertical pipe 1, the air in the water body sampling container 5 enters the vertical pipe 1 from the ventilation interface 9 and the ventilation nozzle 2, so that external water body can enter the water body sampling container 5 through the water inlet head 15, the hose 14 and the water inlet nozzle 12, the floating ball 8 in the water body sampling container 5 floats and the upper end of the inner cavity of the water body sampling container 5 is sealed along with the increase of the water body sampling container 5, and the external water sample can not continue to enter the water body sampling container 5, and the automatic sampling stopping is realized. After the sampling is finished, the handle 29 is loosened, the pull rod 23 is driven to move downwards until the pull rod 23 is reset under the elastic action of the reset spring 24 and the action of the torsion spring pulling the flip 19, the layered water body sampler can be taken out from water, the first valve 13 on each water body sampling container 5 is closed, and the water body sampling is finished at the moment. When the water body sample needs to be taken out, the water inlet nozzle 12 is separated from the hose 14, the water body sampling container 5 is detached from the clamping piece 6 on the vertical pipe 1, the water sample in the water body sampling container 5 can be treated independently, the second valve 18 is opened, the water sample in the water body sampling container 5 can be discharged, and the operation is very convenient. If external factors such as the impact of water flow received in the water sampling process lead to water sampling container 5 to drop from joint spare 6, the suspension chamber 11 that sets up in the water sampling container 5 can make water sampling container 5 float on the surface of water, and the operating personnel of being convenient for retrieve water sampling container 5.
It should be understood that in the claims, the specification of the present invention, all "including … …" should be interpreted as open-ended meaning that it is equivalent to "at least … …", and not as closed-ended meaning that it should not be interpreted to "include … …" only.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (5)
1. The layered water body sampler for water environment detection is characterized by comprising a vertical standpipe which is vertically arranged and is of a hollow tubular structure, wherein a plurality of ventilation nozzles which are distributed along the length direction of the standpipe and are communicated with the inner cavity of the standpipe are fixedly arranged on the standpipe, and a track which is arranged along the length direction of the standpipe is also fixedly arranged on the standpipe;
the vertical pipe is detachably provided with a plurality of water sampling containers which are longitudinally distributed, the upper part of the inner cavity of the water sampling container is of a conical structure which is gradually reduced from bottom to top, a floating ball is arranged in the water sampling container, the water sampling container is fixedly connected with a ventilation interface which is communicated with the upper end of the inner cavity of the water sampling container, the outer end of the ventilation interface is fixedly connected with an elastic ring, the ventilation interfaces are in one-to-one correspondence with the ventilation nozzles, and when the water sampling container is arranged on the vertical pipe, the ventilation nozzles stretch the elastic rings and are inserted into the corresponding ventilation interfaces; the water sampling container is also fixedly connected with a water inlet nozzle, a first valve for controlling the water inlet nozzle to be opened and closed is arranged on the water inlet nozzle, a hose is detachably connected to the outer end of the water inlet nozzle, the end part of the hose, which is opposite to the water inlet nozzle, is connected with a water inlet head which is arranged on a track in a sliding manner, a locking piece capable of locking the water inlet head on the track is arranged on the water inlet head, a second valve for controlling the water inlet head to be opened and closed is arranged on the water inlet head, the second valve comprises a flip cover which is rotatably arranged on the water inlet head, a plug capable of sealing the outer end of the water inlet head is fixedly arranged on the inner side surface of the flip cover, and a torsion spring which can drive the flip cover to rotate and enable the plug to be tightly pressed on the outer end of the water inlet head is arranged at the rotation joint of the flip cover; the vertical pipe is also provided with a transmission mechanism for driving the second valve to open and close, the transmission mechanism comprises a mounting frame fixed on the vertical pipe, a pull rod is slidably arranged on the mounting frame, the sliding direction of the pull rod is parallel to the length direction of the vertical pipe, a reset spring for resetting the pull rod is arranged between the pull rod and the mounting frame, a pull rope is fixedly connected to the flip cover, the upper end of the pull rope is fixedly connected with a fixing buckle capable of being clamped and fixed at any height of the pull rod, the fixing buckle comprises two half buckles of arc structures hinged with each other, an anti-slip pad is fixedly arranged on the inner side surface of each half buckle, and the two half buckles are clamped with each other between the side edges of the positions opposite to each other;
the upper end of the vertical pipe is fixedly connected with a handle, a handle for controlling the transmission mechanism is arranged beside the handle, and the upper end of the pull rod is fixedly connected with the handle;
the vertical pipe is also provided with air outlets higher than all the water sampling containers and the water inlet heads;
an air pump is fixedly arranged on the vertical pipe at the position of the air outlet;
the vertical pipe is also fixedly provided with a floating plate positioned below the air pump, the track is also provided with scale marks arranged along the length direction of the track, and zero scales of the scale marks are flush with the lower end surface of the floating plate.
2. The layered water sampler for water environment detection according to claim 1, wherein a suspension cavity is further arranged in the water sampling container near the upper end.
3. The layered water body sampler for water environment detection according to claim 1, wherein two ends of the hose are respectively and tightly sleeved on the water inlet nozzle and the water inlet head.
4. The layered water body sampler for water environment detection according to claim 1, wherein a clamping piece with a circular arc structure is fixedly arranged on the vertical pipe, the central angle of the clamping piece is larger than 180 degrees, the water body sampling container is of a cylindrical structure, a groove with a circular ring structure is arranged on the outer side face of the water body sampling container, the water body sampling container is embedded into the clamping piece and is positioned in the groove, and the upper end of the clamping piece is attached to the upper wall of the groove; the ventilation mouth is vertically arranged on the side face of the vertical pipe, and the ventilation mouth is transversely inserted into the ventilation interface.
5. The layered water body sampler for water environment detection according to claim 1, wherein a water outlet is arranged at the lower end of the vertical pipe, and a bottom cover capable of sealing the water outlet is further connected to the lower end of the vertical pipe in a screwed mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211065777.7A CN115326491B (en) | 2022-09-01 | 2022-09-01 | Layered water body sampler for water environment detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211065777.7A CN115326491B (en) | 2022-09-01 | 2022-09-01 | Layered water body sampler for water environment detection |
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| CN115326491A CN115326491A (en) | 2022-11-11 |
| CN115326491B true CN115326491B (en) | 2023-05-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111044413A (en) * | 2020-01-07 | 2020-04-21 | 中国环境科学研究院 | Testing device and testing method for DGT of lake water body |
| CN116147991B (en) * | 2023-04-18 | 2023-07-21 | 湖北工业大学 | Water environment pollution sampling device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5739439A (en) * | 1995-10-05 | 1998-04-14 | Dutton-Lainson Company | Vertical stratified air/water sampling device |
| CN206479367U (en) * | 2017-02-23 | 2017-09-08 | 江西水利职业学院 | Multilayer water body sampling device |
| CN109490014B (en) * | 2018-10-30 | 2021-04-06 | 华北水利水电大学 | Hydrology surveys quality of water sample frame |
| CN210154866U (en) * | 2019-07-04 | 2020-03-17 | 贵州民族大学 | Layered water body sampling device |
| CN211085832U (en) * | 2019-08-23 | 2020-07-24 | 集宁师范学院 | Water body layering sampling device |
| CN110579374B (en) * | 2019-08-26 | 2022-02-11 | 山东省地质矿产勘查开发局八〇一水文地质工程地质大队 | Water fullness prompting sampling device and method for underwater depth-fixed sampling |
| CN211374206U (en) * | 2019-09-29 | 2020-08-28 | 内蒙古众元测试技术有限公司 | Surface water layering sampling device |
| CN111157294A (en) * | 2020-03-25 | 2020-05-15 | 北京市环境保护科学研究院 | Differential pressure driven passive underground water stratification sampling device, sampling system and method |
| CN111504721A (en) * | 2020-06-01 | 2020-08-07 | 山东耕牧生物科技有限公司 | Aquaculture pond quality of water sampling device |
| CN213336948U (en) * | 2020-09-24 | 2021-06-01 | 天津市生态环境监测中心 | Water body layered sampling equipment for environmental monitoring |
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