CN110346240B - Floating swimming plant density measuring device and method - Google Patents
Floating swimming plant density measuring device and method Download PDFInfo
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- CN110346240B CN110346240B CN201910521677.2A CN201910521677A CN110346240B CN 110346240 B CN110346240 B CN 110346240B CN 201910521677 A CN201910521677 A CN 201910521677A CN 110346240 B CN110346240 B CN 110346240B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/02—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume
- G01N9/04—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring weight of a known volume of fluids
Abstract
The invention discloses a device and a method for measuring the density of phytoplankton, aiming at solving the defects of inconvenient operation, high labor intensity and low measurement accuracy of the density measurement of the phytoplankton. The device comprises a quantifying cylinder and a collecting cylinder, wherein a one-way liquid discharge valve is installed at the lower end of the quantifying cylinder, a pushing piston is installed in the quantifying cylinder, a plurality of liquid inlet holes are formed in the pushing piston, a one-way liquid inlet valve plate is installed on each liquid inlet hole, the collecting cylinder is rotatably installed at the lower end of the quantifying cylinder, water filtering cloth is paved on the bottom surface of the collecting cylinder, a plurality of partition plates are uniformly distributed in the collecting cylinder, the partition plates divide the inside of the collecting cylinder into a plurality of collecting boxes, a poking rod is connected to the outer wall of the collecting cylinder, a positioning cover is installed above the quantifying cylinder, a piston rod is connected to the pushing piston, and the piston rod penetrates through the positioning cover; the piston rod is provided with a rack, a driving bevel gear and a driven bevel gear are arranged between the quantitative cylinder and the positioning cover, the driving bevel gear is provided with a meshing gear, the meshing gear is meshed with the rack in a matching manner, and the driven bevel gear is provided with an impeller.
Description
Technical Field
The invention relates to a metering device, in particular to a device and a method for measuring the density of phytoplankton.
Background
At present, the common method for measuring the density of the marine phytoplankton is to manually drag a collecting net to collect the phytoplankton in the collecting net, and a paper pen is used for recording the numerical value on a flowmeter once every dragging, so that the operation is inconvenient, the accuracy is low, and the dragging net is heavy, the operation is laborious and the labor intensity is high.
Disclosure of Invention
The invention overcomes the defects of inconvenient operation, high labor intensity and low measurement accuracy of the density measurement of the phytoplankton, and provides the device and the method for measuring the density of the phytoplankton.
In order to solve the technical problems, the invention adopts the following technical scheme: a device for measuring the density of phytoplankton comprises a quantifying cylinder and a collecting cylinder, wherein a one-way liquid discharge valve is arranged at the lower end of the quantifying cylinder, a pushing piston is arranged in the quantifying cylinder, a plurality of liquid inlet holes are formed in the pushing piston, a one-way liquid inlet valve block is arranged on each liquid inlet hole, a plurality of limiting studs are hermetically connected to the side wall of the quantifying cylinder from top to bottom, the end parts of the limiting studs can extend into the quantifying cylinder and are used for limiting the pushing piston, the collecting cylinder can be rotatably arranged at the lower end of the quantifying cylinder, a plurality of water through holes are formed in the bottom surface of the collecting cylinder, water filtering cloth is laid on the bottom surface of the collecting cylinder, a plurality of partition plates are uniformly arranged in the collecting cylinder, the partition plates divide the collecting cylinder into a plurality of collecting boxes, any collecting box can be arranged below the one-way liquid discharge valve by rotating the collecting cylinder, a poking rod is connected to the outer wall of the collecting cylinder, a positioning cover is arranged above the limiting cover, a piston rod is connected to the pushing piston rod, the positioning cover penetrates through the positioning cover, a plurality of positioning grooves are arranged on the outer wall of the positioning cover and correspond to the partition plates one-to one, the poke rod is provided with a buffer column which can be abutted against the positioning groove; a rack is arranged on the piston rod, a driving bevel gear and a driven bevel gear are arranged between the quantitative cylinder and the positioning cover, the driving bevel gear and the driven bevel gear are in meshing transmission, a meshing gear is arranged on the driving bevel gear, the meshing gear is in meshing fit with the rack, an impeller is arranged on the driven bevel gear, and the piston rod moves upwards to drive the impeller to rotate so as to drive water to flow towards the quantitative cylinder; the piston rod moves downwards to drive the impeller to rotate so as to drive water to flow towards the direction of the positioning cover.
When the density measuring device for phytoplankton is adopted to measure the density of the phytoplankton in water, the method comprises the following steps: a. pushing the pushing piston downwards to the bottom of the quantifying cylinder, selecting a limit stud at a proper position according to the volume of the quantifying cylinder required to be used, and screwing the limit stud inwards to enable the limit stud to limit the pushing piston; b. placing the quantifying cylinder in water needing to measure the density of the phytoplankton, so that the quantifying cylinder is submerged by the water; c. the piston rod is pulled upwards, the piston rod drives the pushing piston to slide upwards to the position of the limiting stud which extends inwards, the one-way liquid inlet valve plate is opened in the process of pushing the piston to slide upwards, water flows into the quantifying cylinder through the liquid inlet hole and the one-way liquid inlet valve plate to be pushed below the piston, and the piston rod moves upwards to drive the impeller to rotate so as to drive the water to flow towards the quantifying cylinder, so that the opening of the one-way liquid inlet valve plate is facilitated, and the water flows can conveniently enter the quantifying cylinder; d. the piston rod is pressed downwards to push the piston to slide downwards, at the moment, the one-way liquid inlet valve plate closes the liquid inlet hole, the one-way liquid outlet valve is opened, water flows into the collecting box through the one-way liquid outlet valve, after being filtered by the water filtering cloth, phytoplankton is remained on the water filtering cloth, the piston rod moves downwards to drive the impeller to rotate reversely so as to drive the water to flow towards the positioning cover, the water flow above the piston pushed in the quantifying cylinder is sucked, the covering force of the one-way liquid inlet valve plate is increased, and the one-way liquid inlet valve plate cover is more compact; e. after the piston is pushed to reach the bottom of the quantitative cylinder, the collecting cylinder is driven to rotate through the poke rod, the buffer column slides into another adjacent positioning groove, and another adjacent collecting box rotates below the one-way drain valve; f. repeating the steps c, d and e until all the collection boxes finish the collection of the floating swimming plants; g. the whole device for measuring the density of phytoplankton is taken out of water, the number or weight N of the phytoplankton collected in each collection box is calculated, and the volume N of the quantitative cylinder is used to calculate the amount of phytoplankton in unit volume as N/N.
Adopt a ration section of thick bamboo can make the water of getting at every turn more accurate, be favorable to improving the precision, the collection box is separated into to a plurality of to the collection section of thick bamboo, makes phytoplankton density measuring device can accomplish many times after once launching and measure, can launch once and measure different waters position, and it is more convenient to operate. And after all the collecting boxes are sampled and collected, the phytoplankton density measuring device discharges water, and the phytoplankton is quantitatively measured, so that the quantity of the phytoplankton in unit volume is calculated. The piston rod moves upwards to drive the impeller to rotate so as to drive water to flow towards the direction of the quantifying cylinder, so that the opening of the one-way liquid inlet valve plate is facilitated, and the water can conveniently enter the quantifying cylinder; the piston rod moves downwards to drive the impeller to rotate so as to drive water to flow towards the direction of the positioning cover, the water flow above the piston pushed in the quantifying cylinder is sucked, the covering force of the one-way liquid inlet valve plate is increased, and the one-way liquid inlet valve plate cover is more compact. The device for measuring the density of the phytoplankton is convenient to collect, measure and operate the phytoplankton, reduces the labor intensity, greatly improves the measurement accuracy and simultaneously improves the working efficiency.
Preferably, the one-way liquid discharge valve comprises a valve seat, a valve ball, an abutting spring and a spring seat, wherein a valve hole is formed in the valve seat, a truncated cone-shaped sealing surface is formed in the inner wall of the valve hole, the abutting spring is installed between the spring seat and the valve ball, and the valve ball abuts against the sealing surface in a sealing mode. The one-way liquid discharge valve with the structure has good sealing performance and long service life.
Preferably, the lower end of the quantifying cylinder is provided with a positioning column, the middle of the collecting cylinder is provided with a rotating sleeve, the rotating sleeve is movably sleeved on the positioning column, the lower end of the positioning column is connected with a supporting plate, and the lower end of the collecting cylinder is supported on the supporting plate. The positioning column and the rotating sleeve are arranged to facilitate stable rotation of the collecting cylinder, and the lower end of the rotating sleeve is supported on the supporting plate to improve the stability of the whole collecting cylinder.
Preferably, the lower end face of the supporting plate is provided with a mounting groove, an air bag is mounted in the mounting groove, the air bag is communicated with an inflation tube, and the inflation tube extends to the position above the positioning cover. Before the whole phytoplankton density measuring device is lifted upwards, the air bag is inflated through the inflation tube, so that the air bag is expanded, the buoyancy is greatly increased, and the lifting of the phytoplankton density measuring device is more labor-saving.
Preferably, the inner cover ring is sleeved on the rotary sleeve on the bottom surface of the collecting cylinder, the outer cover ring is arranged on the position, close to the inner wall, of the bottom surface of the collecting cylinder, the water filtering cloth is annular, the outer edge of the water filtering cloth is tightly arranged between the bottom surface of the collecting cylinder and the outer cover ring, and the inner edge of the water filtering cloth is arranged between the bottom surface of the collecting cylinder and the inner cover ring. The water filtering cloth is stable and reliable to install and has good water filtering effect.
Preferably, the outer cover ring and the inner cover ring are respectively provided with a plurality of slots corresponding to the partition plates one by one, the outer ends of the partition plates are inserted into the slots on the outer cover ring, and the inner ends of the partition plates are inserted into the slots on the inner cover ring. The two ends of the partition plate are respectively arranged in the slots on the outer cover ring and the inner cover ring, so that the installation is reliable, and the disassembly and the assembly are convenient.
Preferably, a support is connected between the quantifying cylinder and the positioning cover, the lower end of the support is connected with a fastening ring, the fastening ring is tightly connected to the upper end of the quantifying cylinder, and the driving bevel gear and the driven bevel gear are both arranged on the support. The support is convenient for the installation of locating cover, drive bevel gear, driven bevel gear.
A measuring method by using a phytoplankton density measuring device comprises the following steps: a. pushing the pushing piston downwards to the bottom of the quantifying cylinder, selecting a limit stud at a proper position according to the volume of the quantifying cylinder required to be used, and screwing the limit stud inwards to enable the limit stud to limit the pushing piston; b. placing the quantifying cylinder in water needing to measure the density of the phytoplankton, so that the quantifying cylinder is submerged by the water; c. the piston rod is pulled upwards, the piston rod drives the pushing piston to slide upwards to the position of the limiting stud which extends inwards, the one-way liquid inlet valve plate is opened in the process of pushing the piston to slide upwards, water flows into the quantifying cylinder through the liquid inlet hole and the one-way liquid inlet valve plate to be pushed below the piston, and the piston rod moves upwards to drive the impeller to rotate so as to drive the water to flow towards the quantifying cylinder, so that the opening of the one-way liquid inlet valve plate is facilitated, and the water flows can conveniently enter the quantifying cylinder; d. the piston rod is pressed downwards to push the piston to slide downwards, at the moment, the one-way liquid inlet valve plate closes the liquid inlet hole, the one-way liquid outlet valve is opened, water flows into the collecting box through the one-way liquid outlet valve, after being filtered by the water filtering cloth, phytoplankton is remained on the water filtering cloth, the piston rod moves downwards to drive the impeller to rotate reversely so as to drive the water to flow towards the positioning cover, the water flow above the piston pushed in the quantifying cylinder is sucked, the covering force of the one-way liquid inlet valve plate is increased, and the one-way liquid inlet valve plate cover is more compact; e. after the piston is pushed to reach the bottom of the quantitative cylinder, the collecting cylinder is driven to rotate through the poke rod, the buffer column slides into another adjacent positioning groove, and another adjacent collecting box rotates below the one-way drain valve; f. repeating the steps c, d and e until all the collection boxes finish the collection of the floating swimming plants; g. the whole device for measuring the density of phytoplankton is taken out of water, the number or weight N of the phytoplankton collected in each collection box is calculated, and the volume N of the quantitative cylinder is used to calculate the amount of phytoplankton in unit volume as N/N.
Compared with the prior art, the invention has the beneficial effects that: the density measurement of the phytoplankton is convenient to operate, the labor intensity is reduced, and the measurement accuracy is greatly improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a top view of the collection cartridge of the present invention;
in the figure: 1. the device comprises a dosing cylinder, a 2 collecting cylinder, a 3 one-way liquid discharge valve, a 4 pushing piston, a 5 liquid inlet hole, a 6 one-way liquid inlet valve plate, a 7 limiting stud, 8 a water through hole, a 9 water filtering cloth, a 10 partition plate, 11 a collecting box, 12 a poking rod, 13 a positioning cover, 14 a positioning groove, 15 a buffering column, 16 a rack, 17 a driving bevel gear, 18 a driven bevel gear, 19 a meshing gear, 20, an impeller, 21 a valve seat, 22 a valve ball, 23 a butting spring, 24 a spring seat, 25, a piston rod, 26 a sealing surface, 27 a positioning column, 28 a rotating sleeve, 29 a supporting disk, 30, a mounting groove, 31, an air bag, 32 an air charging pipe, 33, a high-pressure air storage tank, 34 an inner cover ring, 35 an outer cover ring, 36, a slot, 37 a buffering cylinder, 38 an end cover, 39, a positioning ring, 40 a support, 41 and a fastening ring.
Detailed Description
The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:
example (b): the utility model provides a phytoplankton density measuring device (see attached figure 1, attached figure 2), includes a quantification section of thick bamboo 1, a collection section of thick bamboo 2, and one-way flowing back valve 3 is installed to quantification section of thick bamboo lower extreme, and one-way flowing back valve includes disk seat 21, valve ball 22, butt spring 23, spring holder 24, is equipped with the valve opening on the disk seat, is equipped with the sealed face 26 of round platform shape on the valve opening inner wall, and the butt spring mounting is between spring holder and valve ball, and the sealed butt of valve ball is on sealed face. The installation promotes piston 4 in the quantifying cylinder, be equipped with a plurality of feed liquor holes 5 on the promotion piston, one-way feed liquor valve block 6 of installation on the feed liquor hole, from last down a plurality of spacing double-screw bolts 7 of sealing connection on the quantifying cylinder lateral wall, spacing double-screw bolt tip can stretch into and be used for spacing to promoting the piston in the quantifying cylinder, the collecting cylinder is rotatable to be installed at quantifying cylinder lower extreme, collecting cylinder upper portion inner wall activity suit is on quantifying cylinder lower part outer wall, quantifying cylinder lower extreme is equipped with reference column 27, be equipped with swivel cover 28 in the middle of the collecting cylinder, swivel cover activity suit is on the reference column, reference column lower extreme joint support dish 29, the collecting cylinder lower extreme supports on the supporting disk. The lower end face of the supporting plate is provided with a mounting groove 30, an air bag 31 is mounted in the mounting groove and is communicated with an inflation tube 32, the inflation tube extends to the position above the positioning cover, and an inflation valve and an air release valve are mounted on the position, close to the upper end, of the inflation tube. The inflation tube is communicated with a high-pressure air storage tank 33 which is arranged on the ship.
The surge drum bottom surface is equipped with a plurality of limbers 8, water cloth 9 has been laid to the surge drum bottom surface, the equipartition sets up a plurality of baffles 10 in the surge drum, the baffle separates into a plurality of collection box 11 in with the surge drum, it can arrange one-way flowing back valve below in to rotate the surge drum messenger collection box homoenergetic wantonly, connect poker rod 12 on the surge drum outer wall, spacing lid top installation location lid 13, connect piston rod 25 on the promotion piston, the piston rod runs through the location lid, the location lid is fixed a position the piston rod, the piston rod upper end is T shape structure, be equipped with a plurality of positioning groove 14 with the baffle one-to-one on the location lid outer wall, installation buffering post 15 on the poker rod, but buffering post butt is in positioning groove. The cover is equipped with inner cup ring 34 on the collecting vessel bottom surface commentaries on classics cover, and the collecting vessel bottom surface is close to inner wall position installation outer cup ring 35, and drainage cloth is the annular, and drainage cloth outward flange closely installs between collecting vessel bottom surface and outer cup ring, and drainage cloth inward flange is installed between collecting vessel bottom surface and inner cup ring. The outer cover ring and the inner cover ring are respectively provided with a plurality of slots 36 corresponding to the partition plates one by one, the outer ends of the partition plates are inserted in the slots on the outer cover ring, and the inner ends of the partition plates are inserted in the slots on the inner cover ring. A buffer cylinder 37 is installed on the poke rod, one end of the buffer cylinder is connected with an end cover 38, the other end of the buffer cylinder is provided with a positioning flange, a buffer spring is installed in the buffer cylinder, one end of a buffer column is provided with a positioning head, the other end of the buffer column is of a hemispherical structure, and the positioning head is installed in the buffer cylinder in an adaptive mode and is abutted between the abutting spring and the positioning flange. The positioning ring 39 is connected to the outer side of the positioning cover, and the poke rod is arranged in the positioning ring and attached to the inner wall of the positioning ring.
A rack 16 is arranged on the piston rod, a driving bevel gear 17 and a driven bevel gear 18 are arranged between the dosing cylinder and the positioning cover, the driving bevel gear and the driven bevel gear are in meshing transmission, a meshing gear 19 is arranged on the driving bevel gear, the meshing gear is in meshing fit with the rack, an impeller 20 is arranged on the driven bevel gear, and the piston rod moves upwards to drive the impeller to rotate so as to drive water to flow towards the dosing cylinder; the piston rod moves downwards to drive the impeller to rotate so as to drive water to flow towards the direction of the positioning cover. A support 40 is connected between the quantifying cylinder and the positioning cover, the lower end of the support is connected with a fastening ring 41, the fastening ring is tightly connected to the upper end of the quantifying cylinder, and the driving bevel gear and the driven bevel gear are both installed on the support. The support is provided with a mounting seat, the mounting seat is provided with a mounting hole, and the driven bevel gear is in adaptive connection with the mounting hole.
A measuring method by using a phytoplankton density measuring device comprises the following steps: a. pushing the pushing piston downwards to the bottom of the quantifying cylinder, selecting a limit stud at a proper position according to the volume of the quantifying cylinder required to be used, and screwing the limit stud inwards to enable the limit stud to limit the pushing piston; b. placing the quantifying cylinder in water needing to measure the density of the phytoplankton, so that the quantifying cylinder is submerged by the water; c. the piston rod is pulled upwards, the piston rod drives the pushing piston to slide upwards to the position of the limiting stud which extends inwards, the one-way liquid inlet valve plate is opened in the process of pushing the piston to slide upwards, water flows into the quantifying cylinder through the liquid inlet hole and the one-way liquid inlet valve plate to be pushed below the piston, and the piston rod moves upwards to drive the impeller to rotate so as to drive the water to flow towards the quantifying cylinder, so that the opening of the one-way liquid inlet valve plate is facilitated, and the water flows can conveniently enter the quantifying cylinder; d. the piston rod is pressed downwards to push the piston to slide downwards, at the moment, the one-way liquid inlet valve plate closes the liquid inlet hole, the one-way liquid outlet valve is opened, water flows into the collecting box through the one-way liquid outlet valve, after being filtered by the water filtering cloth, phytoplankton is remained on the water filtering cloth, the piston rod moves downwards to drive the impeller to rotate reversely so as to drive the water to flow towards the positioning cover, the water flow above the piston pushed in the quantifying cylinder is sucked, the covering force of the one-way liquid inlet valve plate is increased, and the one-way liquid inlet valve plate cover is more compact; e. after the piston is pushed to reach the bottom of the quantitative cylinder, the collecting cylinder is driven to rotate through the poke rod, the buffer column slides into another adjacent positioning groove, and another adjacent collecting box rotates below the one-way drain valve; f. repeating the steps c, d and e until all the collection boxes finish the collection of the floating swimming plants; g. the whole device for measuring the density of phytoplankton is taken out of water, the number or weight N of the phytoplankton collected in each collection box is calculated, and the volume N of the quantitative cylinder is used to calculate the amount of phytoplankton in unit volume as N/N. Can calculate the average value through a plurality of collection boxes, also can calculate the distribution condition of phytoplankton in different positions through the collection of collecting the box in different positions, it is nimble convenient.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (7)
1. A device for measuring the density of zooplankton plants is characterized by comprising a quantifying cylinder and a collecting cylinder, wherein a one-way liquid discharge valve is installed at the lower end of the quantifying cylinder, a pushing piston is installed in the quantifying cylinder, a plurality of liquid inlet holes are formed in the pushing piston, a one-way liquid inlet valve block is installed on each liquid inlet hole, a plurality of limiting studs are hermetically connected to the side wall of the quantifying cylinder from top to bottom, the end parts of the limiting studs can extend into the quantifying cylinder and are used for limiting the pushing piston, the collecting cylinder is rotatably installed at the lower end of the quantifying cylinder, a plurality of water through holes are formed in the bottom surface of the collecting cylinder, water filtering cloth is laid on the bottom surface of the collecting cylinder, a plurality of partition plates are uniformly distributed in the collecting cylinder and divide the inside of the collecting cylinder into a plurality of collecting boxes, the collecting cylinder is rotated to enable any collecting box to be placed below the one-way liquid discharge valve, a poking rod is connected to the outer wall of the collecting cylinder, a positioning cover is installed above the limiting cover, a piston rod is connected to the pushing piston rod, and penetrates through the positioning cover, a plurality of positioning grooves are formed in the outer wall of the positioning cover and the partition plate in a one-to-one correspondence mode, and buffer columns are mounted on the poke rod and can abut against the positioning grooves; a rack is arranged on the piston rod, a driving bevel gear and a driven bevel gear are arranged between the quantitative cylinder and the positioning cover, the driving bevel gear and the driven bevel gear are in meshing transmission, a meshing gear is arranged on the driving bevel gear, the meshing gear is in meshing fit with the rack, an impeller is arranged on the driven bevel gear, and the piston rod moves upwards to drive the impeller to rotate so as to drive water to flow towards the quantitative cylinder; the piston rod moves downwards to drive the impeller to rotate so as to drive water to flow towards the direction of the positioning cover; the lower end of the quantifying cylinder is provided with a positioning column, the middle of the collecting cylinder is provided with a rotating sleeve, the rotating sleeve is movably sleeved on the positioning column, the lower end of the positioning column is connected with a supporting plate, and the lower end of the collecting cylinder is supported on the supporting plate.
2. The apparatus according to claim 1, wherein the one-way drain valve comprises a valve seat, a valve ball, an abutting spring, and a spring seat, the valve seat is provided with a valve hole, the inner wall of the valve hole is provided with a truncated cone-shaped sealing surface, the abutting spring is installed between the spring seat and the valve ball, and the valve ball is in sealing abutment with the sealing surface.
3. The apparatus according to claim 1, wherein the support plate has a mounting groove on its lower end surface, and an air bag is mounted in the mounting groove and connected to an air tube extending above the positioning cover.
4. The apparatus according to claim 1, wherein the inner cover ring is sleeved on the bottom surface of the collecting cylinder, the outer cover ring is installed on the bottom surface of the collecting cylinder close to the inner wall, the water-filtering cloth is ring-shaped, the outer edge of the water-filtering cloth is tightly installed between the bottom surface of the collecting cylinder and the outer cover ring, and the inner edge of the water-filtering cloth is installed between the bottom surface of the collecting cylinder and the inner cover ring.
5. The apparatus according to claim 2, wherein the outer cover ring and the inner cover ring each have a plurality of slots corresponding to the partitions, the outer ends of the partitions are inserted into the slots of the outer cover ring, and the inner ends of the partitions are inserted into the slots of the inner cover ring.
6. The apparatus according to any one of claims 1 to 3, wherein a support is connected between the quantitative cylinder and the positioning cover, a fastening ring is connected to the lower end of the support, the fastening ring is fastened to the upper end of the quantitative cylinder, and the driving bevel gear and the driven bevel gear are both mounted on the support.
7. A method for measuring the density of phytoplankton using the device for measuring the density of phytoplankton according to claim 1, comprising the steps of: a. pushing the pushing piston downwards to the bottom of the quantifying cylinder, selecting a limit stud at a proper position according to the volume of the quantifying cylinder required to be used, and screwing the limit stud inwards to enable the limit stud to limit the pushing piston; b. placing the quantifying cylinder in water needing to measure the density of the phytoplankton, so that the quantifying cylinder is submerged by the water; c. the piston rod is pulled upwards, the piston rod drives the pushing piston to slide upwards to the position of the limiting stud which extends inwards, the one-way liquid inlet valve plate is opened in the process of pushing the piston to slide upwards, water flows into the quantifying cylinder through the liquid inlet hole and the one-way liquid inlet valve plate to be pushed below the piston, and the piston rod moves upwards to drive the impeller to rotate so as to drive the water to flow towards the quantifying cylinder, so that the opening of the one-way liquid inlet valve plate is facilitated, and the water flows can conveniently enter the quantifying cylinder; d. the piston rod is pressed downwards to push the piston to slide downwards, at the moment, the one-way liquid inlet valve plate closes the liquid inlet hole, the one-way liquid outlet valve is opened, water flows into the collecting box through the one-way liquid outlet valve, after being filtered by the water filtering cloth, phytoplankton is remained on the water filtering cloth, the piston rod moves downwards to drive the impeller to rotate reversely so as to drive the water to flow towards the positioning cover, the water flow above the piston pushed in the quantifying cylinder is sucked, the covering force of the one-way liquid inlet valve plate is increased, and the one-way liquid inlet valve plate cover is more compact; e. after the piston is pushed to reach the bottom of the quantitative cylinder, the collecting cylinder is driven to rotate through the poke rod, the buffer column slides into another adjacent positioning groove, and another adjacent collecting box rotates below the one-way drain valve; f. repeating the steps c, d and e until all the collection boxes finish the collection of the floating swimming plants; g. the whole device for measuring the density of phytoplankton is taken out of water, the number or weight N of the phytoplankton collected in each collection box is calculated, and the volume N of the quantitative cylinder is used to calculate the amount of phytoplankton in unit volume as N/N.
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| CN201910521677.2A CN110346240B (en) | 2019-06-17 | 2019-06-17 | Floating swimming plant density measuring device and method |
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| CN201910521677.2A CN110346240B (en) | 2019-06-17 | 2019-06-17 | Floating swimming plant density measuring device and method |
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