CN117814193A - Plankton sampling device for water ecology investigation and evaluation - Google Patents
Plankton sampling device for water ecology investigation and evaluation Download PDFInfo
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- CN117814193A CN117814193A CN202410246976.0A CN202410246976A CN117814193A CN 117814193 A CN117814193 A CN 117814193A CN 202410246976 A CN202410246976 A CN 202410246976A CN 117814193 A CN117814193 A CN 117814193A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000005070 sampling Methods 0.000 title claims abstract description 75
- 238000011156 evaluation Methods 0.000 title claims abstract description 19
- 238000011835 investigation Methods 0.000 title claims abstract description 14
- 238000007667 floating Methods 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 10
- 230000000149 penetrating effect Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 17
- 238000009423 ventilation Methods 0.000 claims description 8
- 238000005192 partition Methods 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Abstract
The invention relates to the technical field of aquatic organism sampling, in particular to a plankton sampling device for water ecological investigation and evaluation, which comprises a floating box with a truncated cone structure, wherein a central shaft of the floating box is sleeved with a submerged caisson, and a sampling cylinder which is used for sampling water after the caisson descends to the lower part of the water surface is sleeved in the caisson; the top of the buoyancy tank and the interior close to the outer ring of the buoyancy tank are provided with annular storage cavities, and the top surfaces of the storage cavities are provided with a plurality of material placing openings penetrating through the top surface of the buoyancy tank. According to the invention, the floating box is filled with bait and is used for attracting scattered plankton, the caisson which slowly sinks after water contact is arranged, so that the sampling cylinder is driven to descend, when the upper port of the sampling cylinder contacts water, plankton gathers and is poured into the sampling cylinder along with water flow to be collected, when water enters from the bottom of the overflow cavity, the linkage ring can be lifted until the water surface is protruded to separate self-pouring of the water flow, and escape of plankton is avoided, so that the sampling accuracy of regional plankton is improved.
Description
Technical Field
The invention relates to the technical field of aquatic organism sampling, in particular to a plankton sampling device for water ecological investigation and evaluation.
Background
The water ecology investigation and evaluation is an important means for knowing the health condition of the water body and evaluating the quality of the water environment. Plankton is an important component in the water ecosystem and has sensitive reaction to ecological balance and environmental change of the water body. Thus, investigation and evaluation of plankton is one of the important contents of investigation and evaluation of water ecology.
With the development of technology, various automatic plankton sampling devices are developed. These devices utilize different principles and techniques to rapidly collect plankton samples in a body of water. However, when the device is placed in water, plankton is frightened and dispersed, and the water ecology in the original area cannot be accurately reflected. Therefore, there is a need to develop a sampling device that improves the accuracy of the sampling.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a plankton sampling device for water ecological investigation and evaluation, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides a plankton sampling device for water ecological investigation and evaluation, which comprises a floating box with a truncated cone structure, wherein a central shaft of the floating box is sleeved with a submerged caisson, and a sampling cylinder which is used for sampling water after the caisson descends to the lower part of the water surface is sleeved in the caisson; the top of the floating box is provided with an annular storage cavity close to the outer ring of the floating box, the top surface of the storage cavity is provided with a plurality of material placing openings penetrating through the top surface of the floating box, the middle of the floating box is provided with a sleeve cavity, the top surface of the floating box is provided with an annular overflow cavity, the inner diameter of the overflow cavity is larger than that of the sleeve cavity, and the inner wall of the sleeve cavity is provided with a plurality of overflow openings communicated with the overflow cavity;
the outside of the top of the sampling cylinder is provided with a linkage ring sleeved with the overflow cavity, and the inside of the overflow cavity is sleeved with a sealing ring capable of sealing the overflow cavity; the caisson is cylindrical, the outer walls of the middle part and the upper part of the caisson are annular equidistant openings, an annular hanging table is arranged on the outer wall of the top end of the caisson, a limiting table is arranged on the inner wall of the bottom end of the trepanning cavity, the hanging table is movably sleeved with the trepanning cavity, and the caisson is movably sleeved with the limiting table; the bottom of the sampling cylinder is elastically connected with the caisson;
when the buoyancy tank floats on the water surface, the caisson falls into the sleeve cavity to sink, until the top end of the sampling tube is driven to fall into the water surface, water collection and plankton of the back stream begin to collect in the sampling tube, until the height of the communication hole is reached, the water overflows from the sampling tube and flows into a gap reserved in the sleeve cavity, and then flows into the water overflow cavity from a plurality of overflow ports to lift the linkage ring to protrude out of the water surface, so that continuous water filling is stopped.
As a further improvement of the technical scheme, a plurality of communication grooves are formed between the top surface and the inner wall of the sealing ring, and when the sealing ring is pressed to the bottom of the overflow cavity by the linkage ring, the transverse outlet of the communication grooves is opposite to the overflow port.
As a further improvement of the technical scheme, floating rods are symmetrically arranged on the bottom surface of the sealing ring, through holes are symmetrically formed in the bottom surface of the overflow cavity, the floating rods are connected with the through holes in an inserting mode, round blocks are sleeved at the bottom ends of the floating rods, and when the sealing ring floats to the top surface of the overflow cavity, the round blocks touch the bottom surface of the buoyancy tank.
As a further improvement of the technical scheme, the jack is formed in the middle of the side face of the floating rod, when the sealing ring stays at the bottom of the overflow cavity, the jack is completely exposed out of the bottom surface of the floating box, sleeve blocks are symmetrically arranged on the inclined surface of the bottom of the floating box, and clamping pieces used for limiting the sealing ring to stay at the bottom of the overflow cavity are tightly sleeved in the sleeve blocks.
As a further improvement of the technical scheme, the clamping piece is made of PP material into a Z-shaped structure, the upper end of the clamping piece is sleeved with the sleeve block, and the lower end of the clamping piece is provided with a clamping block which is clamped with the jack.
As a further improvement of the technical scheme, the bait is filled in the material storage cavity, and the inside of the material placing port is clamped with the net sheet.
As a further improvement of the technical scheme, a pull rod is sleeved in the bottom center hole of the caisson, a tension spring is embedded in the top end of the pull rod, and the top end of the tension spring is tightly sleeved and matched with the bottom center groove of the sampling cylinder.
As a further improvement of the technical scheme, a partition plate is arranged in the middle part of the caisson and at the lower part of the caisson, the caisson is layered into an upper layer and a lower layer which are respectively a ventilation cavity and a water collecting cavity, the ventilation cavity is movably sleeved with the sampling cylinder, and the water inlet is positioned on the inner wall of the water collecting cavity.
As a further improvement of the technical scheme, the outer wall of the caisson is inserted with a vent pipe communicated with the vent cavity, and the top end of the vent pipe extends to the upper part of the buoyancy tank and is fixedly connected with the side wall of the buoyancy tank.
As the further improvement of this technical scheme, the bottom of pull rod has cup jointed a pair of regulation pole that is the L type, and the minor face is the circular arc pole and a pair of circular arc pole and caisson inner wall match cup joint, the circular arc pole of regulation pole is the level with the position of water inlet and aligns, and the thickness of circular arc pole is greater than the water inlet height.
Compared with the prior art, the invention has the beneficial effects that:
this a plankton sampling device for water ecology investigation aassessment is filled with bait through the buoyancy tank that sets up for attract the plankton that moves back, and set up the caisson that slowly sinks after touching water, and drive the sampling tube and descend, when waiting that the sampling tube upper port touches water, plankton has gathered up and is collected in pouring into the sampling tube along with rivers, when overflow chamber bottom water inflow then can go up the linkage circle and rise and until the protrusion surface of water and cut off the self-filling of rivers, also avoid the escape of plankton, make regional plankton's sampling accuracy obtain improving.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
FIG. 1 is a schematic diagram of the overall sampling state of the present invention;
FIG. 2 is a schematic view of the whole structure of the present invention;
FIG. 3 is a partial cross-sectional view of FIG. 1 of the present invention;
FIG. 4 is a front view of FIG. 3 in accordance with the present invention;
FIG. 5 is a partial cross-sectional view of FIG. 2 of the present invention;
FIG. 6 is a front view of FIG. 5 in accordance with the present invention;
FIG. 7 is an assembled cross-sectional view of the buoyancy can and cartridge of the present invention;
FIG. 8 is a full cross-sectional view of a cartridge of the present invention;
FIG. 9 is a full section view of the buoyancy tank of the present invention;
FIG. 10 is a split view of the seal ring of the present invention;
figure 11 is a partial cross-sectional view of the caisson of the present invention.
The meaning of each reference sign in the figure is:
100. a buoyancy tank; 101. a storage cavity; 102. a sleeve cavity; 103. a limiting table; 104. a water overflow cavity; 105. perforating; 106. an overflow port; 107. a material placing port;
110. sealing rings; 111. a communication groove; 120. a floating rod; 121. a jack; 130. a clamping piece; 131. a clamping block; 140. a mesh sheet; 150. sleeving blocks;
200. a caisson; 201. a water collecting cavity; 202. a ventilation chamber; 203. a water inlet; 204. hanging a table; 210. a pull rod; 211. a tension spring; 220. a vent pipe; 230. an adjusting rod;
300. a sampling cylinder; 301. a communication hole; 310. and a linkage ring.
Detailed Description
The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention. The terms "mounted" and "connected" are to be interpreted broadly, as they may be directly connected, or indirectly connected through an intermediary.
The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," and the like as used herein are based on the orientation or positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, in the description of the invention, the meaning of "a number" is two or more, unless explicitly defined otherwise.
Referring to fig. 1-11, the invention provides a plankton sampling device for water ecological investigation and evaluation, which comprises a floating box 100 with a truncated cone structure, wherein a submerged caisson 200 is sleeved on a central shaft of the floating box 100, and a sampling cylinder 300 for collecting water after the caisson 200 descends to the water surface is sleeved in the caisson 200; buoyancy generated by the buoyancy tank 100 is utilized to hold the caisson 200 and the sampling cylinder 300 below the water surface, so that plankton gathered at the periphery of the buoyancy tank 100 enters the sampled and collected along with the water filling into the sampling cylinder 300; a plurality of hanging rings are arranged at the edge of the top surface of the buoyancy tank 100 at equal intervals and are used for hanging the buoyancy tank 100 for lifting and receiving;
the top of the buoyancy tank 100 and be close to the inside of its outer lane and offered and be annular storage chamber 101, a plurality of storage mouths 107 that run through the buoyancy tank 100 top surface have been offered to the top surface of storage chamber 101, and the storage chamber 101 intussuseption is filled with bait for dissolve into the aquatic and distribute taste and attract the plankton that is driven out, the inside joint of storage mouths 107 has net piece 140 for the bait slowly looses from net piece 140's mesh, avoids the bait to spread out fast.
Further, a sleeve cavity 102 is formed in the middle of the floating box 100, an annular overflow cavity 104 is formed in the top surface of the floating box 100, the inner diameter of the overflow cavity 104 is larger than that of the sleeve cavity 102, and a plurality of overflow ports 106 communicated with the overflow cavity 104 are formed in the inner wall of the sleeve cavity 102;
the outside of the top of the sampling tube 300 is provided with a linkage ring 310 sleeved with the overflow cavity 104, the linkage ring 310 of the sampling tube 300 in the water is sleeved into the overflow cavity 104, when water enters from the bottom of the overflow cavity 104, the linkage ring 310 can be lifted up until the water protrudes out of the water surface to separate the self-filling of water flow, and the escape of plankton is avoided; the inner part of the overflow cavity 104 is sleeved with a sealing ring 110 which can seal the overflow cavity, when the linkage ring 310 does not drop into the overflow cavity 104, the overflow cavity 104 is sealed by the sealing ring 110, so that too much water is prevented from entering and difficult to be discharged rapidly; after the sampling tube 300 descends along with the caisson 200, the linkage ring 310 presses the sealing ring 110 to discharge the water in the water overflow cavity 104, and the water is discharged from the overflow ports 106;
further, the caisson 200 is cylindrical, and the outer walls of the middle and upper parts of the caisson are annular equidistant openings for timely drainage; the outer wall of the top end of the caisson 200 is provided with an annular hanging table 204, the inner wall of the bottom end of the trepanning cavity 102 is provided with a limiting table 103, the hanging table 204 is movably sleeved with the trepanning cavity 102, and the caisson 200 is movably sleeved with the limiting table 103, so that the caisson 200 is limited by the limiting table 103 after sinking; water inlets 203 are formed on two sides of the bottom of the caisson 200 and are used for sinking water; the inner wall of the top of the sampling tube 300 and below the linkage ring 310 is provided with a plurality of communication holes 301 for guiding the water flow inside the sampling tube 300 to the outside, namely the residual space of the trepanning cavity 102 and the inside of the overflow cavity 104, so that the linkage ring 310 can be reversely jacked, and the sampling tube 300 floats to the water surface to block the water flow and retain the collected plankton.
Further, the bottom of the sampling tube 300 is elastically connected with the caisson 200; the bottom center hole of the caisson 200 is sleeved with a pull rod 210, the top end of the pull rod 210 is embedded with a tension spring 211, and the top end of the tension spring 211 is tightly sleeved with a bottom center groove of the sampling tube 300; so that the caisson 200 can drive the sampling tube 300 to descend when sinking, and the sampling tube 300 can be elastically pulled away from the caisson 200 when the top water flow is lifted;
a partition board is arranged in the middle part of the caisson 200 and is arranged at the lower part, the caisson 200 is divided into an upper layer and a lower layer, the upper layer and the lower layer are respectively a ventilation cavity 202 and a water collecting cavity 201, the ventilation cavity 202 is movably sleeved with the sampling cylinder 300, and the water inlet 203 is positioned on the inner wall of the water collecting cavity 201; the outer wall of the caisson 200 is inserted with a vent pipe 220 communicated with the vent cavity 202, and the top end of the vent pipe 220 extends to the upper part of the buoyancy tank 100 and is fixedly connected with the side wall of the buoyancy tank 100; since the bottom of the sampling tube 300 is sleeved with the upper part of the caisson 200, namely the ventilation cavity 202, stable air pressure is required in the interior of the sampling tube, so that the sampling tube 300 can be smoothly lifted.
Specifically, a plurality of communication grooves 111 are formed between the top surface and the inner wall of the sealing ring 110, and when the sealing ring 110 is pressed to the bottom of the overflow cavity 104 by the linkage ring 310, the transverse outlet of the communication groove 111 is opposite to the overflow port 106; when the seal ring 110 is pressed to the bottom of the overflow cavity 104 by the linkage ring 310, water flows out from the communication hole 301, enters the communication groove 111 from the overflow port 106, and overflows from the upper port of the communication groove 111, so that the linkage ring 310 is lifted.
Specifically, the bottom surface of the sealing ring 110 is symmetrically provided with a floating rod 120, the bottom surface of the overflow cavity 104 is symmetrically provided with a perforation 105, the floating rod 120 is spliced with the perforation 105, the bottom end of the floating rod 120 is sleeved with a round block, and when the sealing ring 110 floats to the top surface of the overflow cavity 104, the round block touches the bottom surface of the buoyancy tank 100, so that the limiting sealing ring 110 cannot float and slip;
the middle part of the side surface of the floating rod 120 is provided with an inserting hole 121, when the sealing ring 110 stays at the bottom of the overflow cavity 104, the inserting hole 121 is completely exposed out of the bottom surface of the floating box 100, the bottom inclined surface of the floating box 100 is symmetrically provided with a sleeve block 150, and a clamping piece 130 for limiting the sealing ring 110 to stay at the bottom of the overflow cavity 104 is tightly sleeved in the sleeve block 150; the clamping piece 130 is made of PP material into a Z-shaped structure, the upper end of the clamping piece is sleeved with the sleeve block 150, and the lower end of the clamping piece is provided with a clamping block 131 which is clamped with the jack 121, so that the sealing ring 110 is limited at the bottom of the water overflow cavity 104; after the sampling is finished, the buoyancy tank 100 is taken out from the water, and the clamping block 131 is separated from the jack 121 by outwards stirring the clamping piece 130, so that the sealing ring 110 can be released, and the upper port of the water overflow cavity 104 is sealed by floating when the buoyancy tank 100 touches the water next time.
Further, the bottom of the pull rod 210 is sleeved with a pair of L-shaped adjusting rods 230, the short sides of the adjusting rods are arc rods, the pair of arc rods are matched and sleeved with the inner wall of the caisson 200, the arc rods of the adjusting rods 230 are horizontally aligned with the water inlet 203, and the thickness of the arc rods is larger than the height of the water inlet 203; the arc rod of the adjusting rod 230 is used for adjusting the size of the water inlet 203, so that the water inlet sinking speed of the caisson 200 is controlled, and time is provided for the floating box 100 to overflow the bait to attract plankton.
When the plankton sampling device for water ecology investigation and evaluation is used, the buoyancy tank 100 filled with bait is placed in water to float, then the caisson 200 falls into the sleeve cavity 102 to sink into water until the top end of the sampling cylinder 300 is driven to fall under the water surface, water collection and floating plankton flow back in the sampling cylinder 300 until reaching the height of the communication hole 301, overflows from the communication hole and flows into a gap reserved in the sleeve cavity 102, and flows into the overflow cavity 104 from a plurality of overflow ports 106 to lift the linkage ring 310 to protrude out of the water surface, so that continuous water filling is stopped, and sampling is completed at the same time.
It should be noted that the foregoing embodiments are merely illustrative of the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement the same, not to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (10)
1. A plankton sampling device for aquatic ecology investigation aassessment, its characterized in that: the device comprises a floating box (100) with a cone frustum structure, wherein a central shaft of the floating box (100) is sleeved with a submerged caisson (200), and a sampling cylinder (300) which is used for sampling water after the caisson (200) descends below the water surface is sleeved in the caisson (200); the floating box comprises a floating box body (100), wherein an annular storage cavity (101) is formed in the top end of the floating box body and close to the outer ring of the floating box body, a plurality of material placing ports (107) penetrating through the top surface of the floating box body (100) are formed in the top surface of the storage cavity (101), a sleeve cavity (102) is formed in the middle of the floating box body (100), an annular overflow cavity (104) is formed in the top surface of the floating box body (100), the inner diameter of the overflow cavity (104) is larger than the inner diameter of the sleeve cavity (102), and a plurality of overflow ports (106) communicated with the overflow cavity (104) are formed in the inner wall of the sleeve cavity (102);
the outside of the top of the sampling tube (300) is provided with a linkage ring (310) sleeved with the overflow cavity (104), and the inside of the overflow cavity (104) is sleeved with a sealing ring (110) capable of sealing the overflow cavity; the caisson (200) is cylindrical, the outer walls of the middle part and the upper part of the caisson are annular equidistant openings, an annular hanging table (204) is arranged on the outer wall of the top end of the caisson (200), a limiting table (103) is arranged on the inner wall of the bottom end of the trepanning cavity (102), the hanging table (204) is movably sleeved with the trepanning cavity (102), and the caisson (200) is movably sleeved with the limiting table (103); the two sides of the bottom of the caisson (200) are provided with water inlets (203), the inner wall of the top of the sampling cylinder (300) and the position below the linkage ring (310) are provided with a plurality of communication holes (301), and the bottom of the sampling cylinder (300) is elastically connected with the caisson (200);
when the buoyancy tank (100) floats on the water surface, the caisson (200) falls into the sleeve cavity (102) to sink into water until the top end of the sampling tube (300) is driven to fall under the water surface, water collection and floating plankton which flow back in the sampling tube (300) begin until reaching the height of the communication hole (301), overflows from the water collection and floating plankton and flows into a gap reserved by the sleeve cavity (102), and then flows into the overflow cavity (104) from a plurality of overflow ports (106) to lift the linkage ring (310) to protrude out of the water surface, so that continuous filling of water is blocked.
2. The plankton sampling device for water ecology survey evaluation of claim 1 wherein: a plurality of communication grooves (111) are formed between the top surface and the inner wall of the sealing ring (110), and when the sealing ring (110) is pressed to the bottom of the overflow cavity (104) by the linkage ring (310), the transverse outlet of the communication grooves (111) is opposite to the overflow port (106).
3. The plankton sampling device for water ecology survey evaluation of claim 2 wherein: the bottom surface symmetry of seal ring (110) is equipped with puddle (120), perforation (105) have been seted up to the bottom surface symmetry of overflow chamber (104), puddle (120) are pegged graft with perforation (105), the bottom cover of puddle (120) is equipped with the button, when seal ring (110) float to overflow chamber (104) top surface, the button touches the bottom surface of buoyancy tank (100).
4. A plankton sampling device for use in water ecological investigation and assessment according to claim 3, wherein: jack (121) have been seted up to side middle part department of floating pole (120) in the upper place, and when sealing ring (110) stopped in overflow chamber (104) bottom, jack (121) complete exposure buoyancy tank (100) bottom surface, the bottom inclined plane symmetry of buoyancy tank (100) is provided with cover piece (150), closely cup jointed in cover piece (150) and be used for spacing sealing ring (110) stop fastener (130) in overflow chamber (104) bottom.
5. The plankton sampling device for water ecology survey evaluation of claim 4 wherein: the clamping piece (130) is made of PP material into a Z-shaped structure, the upper end of the clamping piece is sleeved with the sleeve block (150), and the lower end of the clamping piece is provided with a clamping block (131) which is clamped with the jack (121).
6. The plankton sampling device for water ecology survey evaluation of claim 1 wherein: bait is filled in the storage cavity (101), and a net sheet (140) is clamped in the material placing opening (107).
7. The plankton sampling device for water ecology survey evaluation of claim 1 wherein: the bottom center hole of caisson (200) has cup jointed pull rod (210), the top of pull rod (210) has inlayed extension spring (211), the top of extension spring (211) is closely cup jointed the cooperation with the bottom surface center groove of sampling tube (300).
8. The plankton sampling device for water ecology survey evaluation of claim 7 wherein: the middle part of the caisson (200) is internally provided with a partition board at the lower part, the caisson (200) is layered into an upper layer and a lower layer, the upper layer and the lower layer are respectively provided with a ventilation cavity (202) and a water collecting cavity (201), the ventilation cavity (202) is movably sleeved with the sampling cylinder (300), and the water inlet (203) is positioned on the inner wall of the water collecting cavity (201).
9. The plankton sampling device for water ecology survey evaluation of claim 8 wherein: the outer wall of the caisson (200) is inserted with a vent pipe (220) communicated with the vent cavity (202), and the top end of the vent pipe (220) extends to the upper part of the buoyancy tank (100) and is fixedly connected with the side wall of the buoyancy tank (100).
10. The plankton sampling device for water ecology survey evaluation of claim 9 wherein: the bottom of pull rod (210) cup joints a pair of regulation pole (230) that are the L type, and the minor face is the circular arc pole and a pair of circular arc pole and caisson (200) inner wall match cup joint, the circular arc pole of regulation pole (230) is the level alignment with the position of water inlet (203), and the thickness of circular arc pole is greater than water inlet (203) height.
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| CN202410246976.0A CN117814193B (en) | 2024-03-05 | 2024-03-05 | Plankton sampling device for water ecology investigation and evaluation |
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| CN202410246976.0A CN117814193B (en) | 2024-03-05 | 2024-03-05 | Plankton sampling device for water ecology investigation and evaluation |
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