CN114323793A - Deep water sampling device of water quality monitoring - Google Patents
Deep water sampling device of water quality monitoring Download PDFInfo
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- CN114323793A CN114323793A CN202111654978.6A CN202111654978A CN114323793A CN 114323793 A CN114323793 A CN 114323793A CN 202111654978 A CN202111654978 A CN 202111654978A CN 114323793 A CN114323793 A CN 114323793A
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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
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Abstract
The invention relates to the technical field of water sampling, and discloses a water quality monitoring deep water sampling device, which adopts the technical scheme that: the water pump, the sampling cylinder, the counterweight device and the horizontal partition plate hermetically divide the sampling cylinder into a first cavity and a second cavity, and the first cavity is positioned above the second cavity; the water permeable holes, the liquid level sensor, the sealing baffle plate and the driving mechanism are fixedly arranged in the first cavity, and a driving part of the driving mechanism penetrates through the side wall of the first cavity in a sealing mode; the device comprises a U-shaped connecting rod, a depth sensor and a controller, wherein the controller is used for receiving depth data of a sampling cylinder and water level data in a second chamber; this kind of deep water sampling device of water quality monitoring has significantly reduced the sampling operation number of times, avoids the water sample to mix, simple structure moreover, and the volume is less, convenient to use.
Description
Technical Field
The invention relates to the technical field of water sampling, in particular to a deep water sampling device for water quality monitoring.
Background
The water quality monitoring is used for monitoring the water quality and the water pollution condition, and the water pollution is the pollution caused by harmful substances entering the water environment, which can damage the biological resources in the water and harm the human health. In order to monitor water quality and prevent water pollution, the water of different depths needs to be regularly collected to carry out sampling monitoring, and the quality of water of different depths of the water is known, and the sampling of shallow water is more convenient, but the deeper the water depth is, still use the sampling device of shallow water, then need frequently follow the water with sampling device and propose, have the scheduling problem of inefficiency, water sample mixture.
The existing deep water body sampling device can store water bodies with multiple depths through a plurality of sampling storage cavities, but after the storage of the storage cavities is finished, the existing deep water body sampling device still needs to be put forward from the water body, the problem of low efficiency still exists, and meanwhile, the existing deep water body sampling device is complex in structure and large in size.
Disclosure of Invention
The invention provides a water quality monitoring deep water body sampling device which can be used for taking water for multiple times, is convenient to use, has a simple structure and a small volume, and saves energy.
The invention provides a water quality monitoring deep water body sampling device, which comprises: the water pump is positioned above the water surface, and one end of the water pump is connected with the water body sample bottle through a first water pipe;
the sampling cylinder is communicated with the other end of the water pump through a second water pipe, and the second water pipe is provided with an electromagnetic valve;
the counterweight device is arranged at the bottom of the sampling cylinder body;
the horizontal clapboard is arranged in the sampling cylinder body and divides the sampling cylinder body into a first chamber and a second chamber in a sealing way, and the first chamber is positioned above the second chamber;
a plurality of water permeable holes provided on a sidewall of the second chamber;
the liquid level sensor is arranged in the second chamber and used for monitoring the water level in the second chamber;
the sealing baffle is arranged outside the sampling cylinder and corresponds to the plurality of water permeable holes;
the driving mechanism is fixedly arranged in the first chamber, and a driving part of the driving mechanism penetrates through the side wall of the first chamber in a sealing way;
one end of the U-shaped connecting rod is connected with a driving part of the driving mechanism, which is positioned outside the first cavity, and the other end of the U-shaped connecting rod is fixedly connected with the outer side surface of the sealing baffle;
the depth sensor is arranged in the first cavity and used for monitoring the depth of the sampling cylinder;
the controller is arranged in the first cavity and used for receiving depth data of the sampling cylinder and water level data in the second cavity, the sealing baffle is controlled by the driving mechanism to enable the second cavity to intake water, after the liquid level sensor detects that the water level reaches a set water level, the sealing baffle is controlled by the driving mechanism to enable the second cavity to stop intake water, and after the water stops intake water, the electromagnetic valve and the water suction pump are controlled to start pumping water.
The drive mechanism is an electric push rod, the telescopic part of the electric push rod is positioned outside the sampling cylinder, and a first telescopic waterproof sleeve is arranged outside the telescopic part in a sealing mode.
A plurality of holes of permeating water symmetry set up on the lateral wall of second cavity, seal baffle and electric putter are two, and the symmetry sets up.
Actuating mechanism is two electromagnet pieces that are parallel to each other and set up relatively, and the electric property is the same after two electromagnet pieces circular telegrams, repels each other, drives sealed baffle through U type connecting rod and loosens the sheltering from to a plurality of holes of permeating water, and in water got into the second cavity through the hole of permeating water, when two electromagnet pieces circular telegrams back electric property are opposite, the inter attraction drives sealed baffle through U type connecting rod and seals a plurality of holes of permeating water.
A plurality of holes of permeating water symmetry set up on the lateral wall of second cavity, and U type connecting rod is two, and the outside fixed connection of the lateral wall that passes the second cavity respectively and two electromagnetism iron pieces is located to the upper end of two U type connecting rods, the both sides that U type connecting rod is located second cavity lateral wall all are equipped with the flexible waterproof cover of second.
And a first compression spring is connected between the two electromagnet blocks.
Still be equipped with in the second cavity:
the support frame is fixedly connected with the inner wall of the second chamber, the bottom wall of the sampling cylinder and the top of the horizontal partition plate respectively;
one end of the second compression spring penetrates through the water permeable hole and is fixed on the inner side surface of the sealing baffle, and the other end of the second compression spring is fixed on the supporting frame on the same horizontal plane with the water permeable hole.
And the inner side surface of the sealing baffle is provided with a plug corresponding to the water permeable hole.
The sample barrel is the cylindricality, and the counter weight device is toper counter weight device, the counter weight device includes:
the center of the bottom of the conical shell is provided with a threaded groove;
the ferrule is integrally arranged on the circumferential edge of the top opening of the conical shell and is detachably sleeved on the lower part of the sampling cylinder body;
the longitudinal sections of the balancing weights are isosceles trapezoids, the balancing weights are detachably arranged in the conical shell in a matched mode, a threaded through hole is formed in the center of each balancing weight, and the threaded through holes are located right above the threaded grooves;
the screw rod is detachably screwed in the threaded through hole and the threaded groove;
and the nut is detachably screwed on the screw rod.
Still include conveyor, water pipe conveyor includes:
the driving motor is arranged above the water surface;
the reel is fixedly connected with an output shaft of the driving motor through a coupler, and the second water pipe is connected with one end of the water suction pump through the reel.
Compared with the prior art, the invention has the beneficial effects that:
the invention monitors the depth of the sampling cylinder body through the depth sensor, when the sampling cylinder body reaches the set deep water body, the controller controls the driving mechanism to drive the sealing baffle plate through the U-shaped connecting rod to enable the second chamber to start water inflow through the plurality of water permeable holes, the liquid level sensor is arranged in the second chamber, when the liquid level sensor detects that the water level reaches the set water level, the controller controls the driving mechanism to drive the sealing baffle plate to block the plurality of water permeable holes through the U-shaped connecting rod, so that the water inlet of the second chamber is stopped, the controller controls the electromagnetic valve and the water suction pump to be opened again to start water suction until the water in the second chamber is completely pumped out, and the controller controls the electromagnetic valve and the water suction pump to be closed. Because only one second chamber is used as the transfer chamber, the structure is simple, the volume is small, and the energy is saved.
Drawings
Fig. 1 is a schematic view of the overall structure of a water quality monitoring deep water sampling device provided by the invention.
Fig. 2 is a schematic structural diagram of a sampling cylinder in the water quality monitoring deep water sampling device according to the first embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a sampling cylinder in the water quality monitoring deep water sampling device provided in the second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a counterweight device in a water quality monitoring deep water sampling device provided by an embodiment of the invention.
Description of reference numerals:
1-water pump, 2-scroll, 3-driving motor, 4-second water pipe, 5-sampling cylinder, 6-screw, 7-nut, 8-water sample bottle, 9-horizontal partition plate, 10-electromagnetic valve, 11-electric push rod, 12-first telescopic waterproof sleeve, 13-U-shaped connecting rod, 14-sealing baffle, 15-support frame, 16-conical shell, 17-second compression spring, 18-plug, 19-electromagnet block, 20-second telescopic waterproof sleeve, 21-first compression spring, 22-balancing weight and 23-ferrule.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to fig. 1-4, but it should be understood that the scope of the present invention is not limited to the embodiment.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1, a water quality monitoring deep water sampling device provided by an embodiment of the present invention includes: the water pump 1 is positioned above the water surface, and one end of the water pump is connected with the water body sample bottle 8 through a first water pipe; the sampling cylinder 5 is communicated with the other end of the water pump 1 through a second water pipe 4, and the second water pipe 4 is provided with an electromagnetic valve 10; the counterweight device is arranged at the bottom of the sampling cylinder 5; the horizontal clapboard 9 is arranged in the sampling cylinder 5 and hermetically divides the sampling cylinder 5 into a first chamber and a second chamber, and the first chamber is positioned above the second chamber; a plurality of water permeable holes provided on a sidewall of the second chamber; the liquid level sensor is arranged in the second chamber and used for monitoring the water level in the second chamber; the sealing baffle 14 is arranged outside the sampling cylinder 5 and corresponds to the plurality of water permeable holes; the driving mechanism is fixedly arranged in the first chamber, and a driving part of the driving mechanism penetrates through the side wall of the first chamber in a sealing way; one end of the U-shaped connecting rod 13 is connected with a driving part of the driving mechanism, which is positioned outside the first cavity, and the other end of the U-shaped connecting rod is fixedly connected with the outer side surface of the sealing baffle 14; the depth sensor is arranged in the first cavity and used for monitoring the depth of the sampling cylinder body 5; the controller is arranged in the first cavity and used for receiving depth data of the sampling cylinder body 5 and water level data in the second cavity, the sealing baffle 14 is controlled through the driving mechanism to enable the second cavity to enter water, after the liquid level sensor detects that the water level reaches a set water level, the sealing baffle 14 is controlled through the driving mechanism to enable the second cavity to stop entering water, and after the water level stops entering water, the electromagnetic valve 10 and the water suction pump 1 are controlled to start pumping water.
Still be equipped with battery and power module in the first cavity, battery and power module all are equipped with the waterproof layer outward, power module is connected to the battery, power module is used for depth sensor, level sensor, controller and actuating mechanism's power supply.
The invention is characterized in that a second water pipe 4 is a plastic pipe and is wrapped by a flexible metal pipe, so that the second water pipe 4 has certain bearing capacity, meanwhile, the flexible metal pipe can protect the plastic pipe, the water is pumped through the second water pipe 4 and is used for connecting and pulling a sampling cylinder 5, a water pump 1 is arranged on a ship body, the depth of the sampling cylinder 5 is monitored through a depth sensor, when the sampling cylinder 5 reaches a set deep water body, a controller controls a driving mechanism to drive a sealing baffle plate 14 through a U-shaped connecting rod 13 to enable a second cavity to start water inflow through a plurality of water permeable holes, a liquid level sensor is arranged in the second cavity, when the liquid level sensor detects that the water level reaches a set water level, the controller controls the driving mechanism to drive the sealing baffle plate 14 through the U-shaped connecting rod 13 to block the plurality of water permeable holes, so that the second cavity stops water inflow, and then controls an electromagnetic valve 10 and the water pump 1 to be opened, and starting pumping water until all water in the second chamber is pumped out and the set vacuum degree requirement is met, and controlling the electromagnetic valve 10 and the water pump 1 to be closed by the controller.
The driving mechanism, the depth sensor and the controller are arranged in the first cavity, and damage to the driving mechanism, the depth sensor and the controller caused by water is avoided.
The counterweight device is used for setting different configuration devices according to the depth of the sampling water body, so that the sampling cylinder body 5 can overcome buoyancy and reach the set depth under the water pressure of the deep water body.
According to the invention, the sampling cylinder body 5 is hermetically separated into a first cavity and a second cavity by the horizontal partition plate 9, the first cavity is internally provided with a water-free area, the driving mechanism, the depth sensor and the controller are respectively provided with a waterproof protective layer, so that a water taking system stably operates, and the second cavity is a water taking cavity and is directly and fixedly connected and communicated with the lower end of the second water pipe in a sealing manner.
The water taking device can take water for multiple times without the limitation of the number of the storage cavities, is convenient to use, and has simple structure, small volume and energy conservation because only one second cavity is used as a transfer cavity.
Example one
The driving mechanism is an electric push rod 11, the telescopic part of the electric push rod 11 is positioned outside the sampling cylinder body 5, and a first telescopic waterproof sleeve 12 is arranged outside the telescopic part in a sealing mode.
After electric putter 11 extends, can drive sealing baffle 14 outwards movement through U type connecting rod, make deep water normal water get into the second cavity through a plurality of holes of permeating water in, shorten the back when electric putter 11, can drive sealing baffle 14 inwards movement through U type connecting rod, make sealing baffle 14 can block a plurality of holes of permeating water, make the second cavity stop intaking, first flexible waterproof jacket 12 can prevent when electric putter 11 moves, water gets into electric putter 11 from the gap of motion each other, influence electric putter 11's normal use.
In order to make sample barrel 5 whole steady, avoid one side heavier, lead to sample barrel upset, influence the normal falling speed of sample barrel 5, a plurality of holes of permeating water symmetry sets up on the lateral wall of second cavity, sealing baffle 14 and electric putter 11 are two, and the symmetry sets up.
Two sealing baffle 14 and electric putter 11 through the symmetry setting correspond a plurality of holes of permeating water that the symmetry set up for both sides are steady.
Example two
Actuating mechanism is two electromagnet pieces 19 that are parallel to each other and set up relatively, and the electric property is the same after two electromagnet pieces 19 circular telegrams, repels each other, drives sealed baffle 14 through U type connecting rod 13 and loosens the sheltering from to a plurality of holes of permeating water, and water gets into in the second cavity through the hole of permeating water, and when two electromagnet pieces 19 circular telegrams back electric property were opposite, the inter attraction drives sealed baffle 14 through U type connecting rod 13 and seals a plurality of holes of permeating water.
The two electromagnet blocks 19 are respectively connected with the power supply module and the controller, and the two electromagnet blocks 19 repel or attract each other by introducing current into the two electromagnet blocks, so that the sealing baffle 14 is moved.
A plurality of holes of permeating water symmetry set up on the lateral wall of second cavity, U type connecting rod 13 is two, and the lateral wall that the second cavity was passed respectively to the upper end of two U type connecting rods 13 and the outside fixed connection of two magnet blocks 19, the both sides that U type connecting rod 13 is located the second cavity lateral wall all are equipped with the waterproof cover 20 of second flexible.
Water can be avoided entering the first cavity from the gap between the two sides of the side wall of the U-shaped connecting rod 13 and the second cavity through the second telescopic waterproof sleeve 20, and stable operation of the system is ensured.
A first compression spring 21 is connected between the two electromagnet blocks 19.
The first compression spring 21 between the two electromagnet blocks 19 can reduce the power supply current to the two electromagnets when the two electromagnet blocks are attracted, thereby saving energy.
In order to strengthen the second cavity and save energy simultaneously, the second cavity is internally provided with: the support frame 15 is respectively fixedly connected with the inner wall of the second chamber, the bottom wall of the sampling cylinder 5 and the top of the horizontal partition plate 9; one end of the second compression spring 17 penetrates through the water permeable hole and is fixed on the inner side surface of the sealing baffle plate 14, and the other end of the second compression spring is fixed on the support frame 15 which is on the same horizontal plane with the water permeable hole.
Consolidate the second chamber through support frame 15, connect second compression spring 17 simultaneously, can make sealing baffle 14 a plurality of holes of permeating water of quick seal, the energy saving through second compression spring 17.
And plugs 18 corresponding to the water permeable holes are arranged on the inner side surface of the sealing baffle plate 14.
The water permeable holes can be plugged through the plugs 18, the plugs 18 are elastic silica gel plugs, and sealing effect is improved.
In order to adapt to the sampling of the deep water of the different degree of depth, sample barrel 5 is the cylindricality, and the counter weight device is toper counter weight device, the counter weight device includes: the center of the bottom of the conical shell 16 is provided with a threaded groove; the ferrule 23 is integrally arranged on the circumferential edge of the top opening of the conical shell 16 and is detachably sleeved on the lower part of the sampling cylinder 5; the longitudinal sections of the multiple balancing weights 22 are isosceles trapezoids, the balancing weights are detachably arranged in the conical shell 16 in a matched mode, a threaded through hole is formed in the center of each balancing weight 22, and the threaded through holes are located right above the threaded grooves; the screw rod 6 is detachably screwed in the threaded through hole and the threaded groove; and the nut 7 is detachably screwed on the screw rod 6.
The cylindricality sample barrel 5 and conical shell 16 can reduce the resistance of sample barrel 5 decline in-process normal water to sample barrel 5, connect through screw rod 6 and nut between a plurality of balancing weights 22 for balancing weight 22 quantity can be adjusted according to the degree of depth of water, when improving sample barrel 5 decline efficiency, the energy saving.
Still include conveyor, water pipe conveyor includes: the driving motor 3 is arranged above the water surface; and the reel 2 is fixedly connected with an output shaft of the driving motor 3 through a coupler, and the second water pipe is connected with one end of the water suction pump 1 through the reel 2.
Driving motor 3 and spool 2 all can set up on the ship of sample usefulness, and driving motor 3 rotates and drives spool 2 and rotate to it rises or descends to drive the second water pipe.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (10)
1. A water quality monitoring deep water sampling device includes:
the water pump (1) is positioned above the water surface, and one end of the water pump is connected with the water body sample bottle (8) through a first water pipe;
the sampling cylinder body (5) is communicated with the other end of the water suction pump (1) through a second water pipe (4), and an electromagnetic valve (10) is arranged on the second water pipe (4);
the counterweight device is arranged at the bottom of the sampling cylinder body (5);
the horizontal clapboard (9) is arranged in the sampling cylinder body (5) and hermetically divides the sampling cylinder body (5) into a first chamber and a second chamber, and the first chamber is positioned above the second chamber;
a plurality of water permeable holes provided on a sidewall of the second chamber;
the liquid level sensor is arranged in the second chamber and used for monitoring the water level in the second chamber;
the sealing baffle (14) is arranged outside the sampling cylinder body (5) and corresponds to the plurality of water permeable holes;
the driving mechanism is fixedly arranged in the first chamber, and a driving part of the driving mechanism penetrates through the side wall of the first chamber in a sealing way;
one end of the U-shaped connecting rod (13) is connected with a driving part of the driving mechanism, which is positioned outside the first cavity, and the other end of the U-shaped connecting rod is fixedly connected with the outer side surface of the sealing baffle (14);
the depth sensor is arranged in the first cavity and used for monitoring the depth of the sampling cylinder body (5);
the controller is arranged in the first cavity and used for receiving depth data of the sampling cylinder body (5) and water level data in the second cavity and controlling the sealing baffle (14) to enable the second cavity to enter water through the driving mechanism, when the liquid level sensor detects that the water level reaches a set water level, the driving mechanism controls the sealing baffle (14) to enable the second cavity to stop entering water, and when the water level stops entering water, the electromagnetic valve (10) and the water suction pump (1) are controlled to start pumping water.
2. The deep water sampling device for water quality monitoring according to claim 1, wherein the driving mechanism is an electric push rod (11), the telescopic part of the electric push rod (11) is positioned outside the sampling cylinder (5), and a first telescopic waterproof sleeve (12) is sealed outside the telescopic part.
3. A water quality monitoring deep water sampling device according to claim 2 or 3, wherein the plurality of water permeable holes are symmetrically arranged on the side wall of the second chamber, and the number of the sealing baffle plate (14) and the number of the electric push rod (11) are two and are symmetrically arranged.
4. A water quality monitoring deep water sampling device according to claim 1, wherein the driving mechanism is two electromagnet blocks (19) disposed in parallel and opposite to each other, when the two electromagnet blocks (19) are electrically the same after being energized, they repel each other, the sealing baffle (14) is driven by the U-shaped connecting rod (13) to release the shielding of the plurality of water permeable holes, water enters the second chamber through the water permeable holes, when the two electromagnet blocks (19) are electrically opposite to each other after being energized, they attract each other, and the sealing baffle (14) is driven by the U-shaped connecting rod (13) to seal the plurality of water permeable holes.
5. A water quality monitoring deep water body sampling device according to claim 4, characterized in that the plurality of water permeable holes are symmetrically arranged on the side wall of the second chamber, the number of the U-shaped connecting rods (13) is two, the upper ends of the two U-shaped connecting rods (13) respectively penetrate through the side wall of the second chamber and are fixedly connected with the outer sides of the two electromagnet blocks (19), and the two sides of the side wall of the second chamber of the U-shaped connecting rods (13) are respectively provided with a second telescopic waterproof sleeve (20).
6. A water quality monitoring deep water body sampling device according to claim 5, characterized in that a first compression spring (21) is connected between the two electromagnet blocks (19).
7. The water quality monitoring deep water sampling device of claim 2 or 4, wherein the second chamber is further provided with:
the support frame (15) is fixedly connected with the inner wall of the second chamber, the bottom wall of the sampling cylinder body (5) and the top of the horizontal partition plate (9) respectively;
one end of the second compression spring (17) penetrates through the water permeable hole and is fixed on the inner side surface of the sealing baffle plate (14), and the other end of the second compression spring is fixed on a support frame (15) which is on the same horizontal plane with the water permeable hole.
8. A water quality monitoring deep water sampling device according to claim 1, characterized in that the inner side surface of the sealing baffle (14) is provided with plugs (18) corresponding to the permeable holes.
9. The water quality monitoring deep water body sampling device according to claim 1, wherein the sampling cylinder (5) is cylindrical, the counterweight device is a conical counterweight device, and the counterweight device comprises:
the center of the bottom of the conical shell (16) is provided with a threaded groove;
the ferrule (23) is integrally arranged on the circumferential edge of the top opening of the conical shell (16) and is detachably sleeved on the lower part of the sampling cylinder body (5);
the longitudinal sections of the balancing weights (22) are isosceles trapezoids, the balancing weights are detachably arranged in the conical shell (16) in a matched mode, a threaded through hole is formed in the center of each balancing weight (22), and the threaded through holes are located right above the threaded grooves;
the screw rod (6) is detachably screwed in the threaded through hole and the threaded groove;
and the nut (7) is detachably screwed on the screw rod (6).
10. The water quality monitoring deep water sampling device of claim 1, further comprising a conveying device, the water pipe conveying device comprising:
the driving motor (3) is arranged above the water surface;
and the reel (2) is fixedly connected with an output shaft of the driving motor (3) through a coupler, and the second water pipe is connected with one end of the water suction pump (1) through the reel (2).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116165023A (en) * | 2023-04-21 | 2023-05-26 | 山东泰亚环保科技有限公司 | Water body depth-fixing sampler |
| CN116929855A (en) * | 2023-09-18 | 2023-10-24 | 烟台市海洋经济研究院(烟台市渔业技术推广站、烟台市海洋捕捞增殖管理站) | Stratified sampling device for water quality monitoring |
| CN117387720A (en) * | 2023-12-13 | 2024-01-12 | 山东大禹水务建设集团有限公司 | Water depth measuring device and measuring method for reservoir construction |
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| CN116165023A (en) * | 2023-04-21 | 2023-05-26 | 山东泰亚环保科技有限公司 | Water body depth-fixing sampler |
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| CN116929855A (en) * | 2023-09-18 | 2023-10-24 | 烟台市海洋经济研究院(烟台市渔业技术推广站、烟台市海洋捕捞增殖管理站) | Stratified sampling device for water quality monitoring |
| CN116929855B (en) * | 2023-09-18 | 2023-11-21 | 烟台市海洋经济研究院(烟台市渔业技术推广站、烟台市海洋捕捞增殖管理站) | Stratified sampling device for water quality monitoring |
| CN117387720A (en) * | 2023-12-13 | 2024-01-12 | 山东大禹水务建设集团有限公司 | Water depth measuring device and measuring method for reservoir construction |
| CN117387720B (en) * | 2023-12-13 | 2024-03-08 | 山东大禹水务建设集团有限公司 | Water depth measuring device and measuring method for reservoir construction |
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