Portable zooplankton sampling device

Abstract

The utility model relates to a portable zooplankton sampling device. Comprising a sampling installation cylinder, a net opening framework is connected to the upper portion of the sampling installation cylinder, a second collection net is installed on the net opening framework, and a first collection net is detachably connected to an opening in the lower portion of the sampling installation cylinder; the aperture of the second collection net is larger than that of the first collection net; sample collecting units are detachably connected to the bottoms of the first collecting net and the second collecting net; the device further comprises a plurality of spring buckles connected with the net opening framework, and the spring buckles are connected with lifting ropes and installation lifting rings. The sample collecting unit comprises an adapter of which the upper end is flared and the lower end is necked, the peripheral wall of the adapter is provided with an external thread and is screwed with a torsion ring, the necked end of the adapter is screwed with a sample tube, and the bottom of the sample tube is provided with a switch valve. The zooplankton and phytoplankton collecting device can achieve separated collection of zooplankton and phytoplankton in the one-time collecting process, and is easy and convenient to use, convenient to transfer and transport and high in sampling efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of plankton sampling devices, in particular to a portable zooplankton sampling device. Background Art

[0002] Plankton is a tiny organism that lives suspended in water. It requires a microscope to be observed and has weak or no swimming ability. Plankton, commonly referred to as zooplankton and phytoplankton, is an important member of the aquatic ecosystem.

[0003] Plankton has great scientific research value. It can be used as an indicator species of ocean currents and is helpful for exploring the direction of ocean currents. Some luminous plankton has the ability to enrich radioactive isotopes and can be used as an indicator of radioactive isotope contamination in waters. Plankton biology is increasingly valued by biologists and aquatic workers in various countries. In order to study plankton, it is necessary to collect it. Plankton nets are one of the main tools for collecting plankton samples. At present, the plankton nets on the market mainly use the method of connecting the gauze directly to the collection tube, and then three hanging ropes are connected to the top of the plankton net in an undetachable way. The collection method is to connect the plankton collection net to the top of the handheld pole with a hanging rope. The collector holds the tail section of the handheld pole and slowly drags the plankton collection net in the water at a speed of 20-30cm per second in an "∞" shape. The general time is 5-10 minutes.

[0004] In the actual working process, it was found that the traditional plankton net has certain shortcomings: first, the existing gauze net and the collection tube are connected by a cable tie, which is inconvenient to replace. In addition, since most of the collection tubes are made of glass, the collection tube is easily damaged when the collection net is transferred and transported, which is inconvenient to transfer and transport; secondly, when collecting plankton samples for hydrological analysis, it is often necessary to separate the zooplankton and phytoplankton samples. When using the traditional plankton net for routine sampling, the collected phytoplankton contains a large amount of zooplankton, and it is difficult to separate the two, causing inconvenience in use. Therefore, it is urgent to design a portable sampling device to solve the above problems. Utility Model Content

[0005] The utility model provides a portable zooplankton sampling device with reasonable structural design, convenient transfer and transportation, and convenient use to solve the technical problems existing in the known technology. The utility model can realize the separate collection of zooplankton and phytoplankton in one collection process, is simple and convenient to use, and has high sampling efficiency.

[0006] The utility model adopts a technical solution to solve the technical problems existing in the known technology: a portable zooplankton sampling device comprises a sampling installation tube, a mesh frame is fixedly connected to the upper opening of the sampling installation tube, a second collection net is detachably installed on the mesh frame, and a first collection net is detachably connected to the lower opening of the sampling installation tube; the aperture of the second collection net is larger than that of the first collection net; a sample collection unit is detachably connected to the bottom of the first collection net and the second collection net, and a sample collection unit is detachably connected to the bottom of the first collection net and the second collection net. A counterweight block is installed on it; it also includes a plurality of spring buckles which are detachably connected to the mesh frame through grooves opened on the outer peripheral wall, each spring buckle is connected with a hanging rope, and a mounting ring is connected to the intersection of each hanging rope; the sample collection unit includes an adapter with a flared opening at the upper end and a contracted opening at the lower end, an external thread adjacent to the flared end is provided on the outer peripheral wall of the adapter and is screwed with a torsion ring, an internal thread is provided at the contracted end of the adapter and is screwed with a sample tube, and a switch valve is installed at the bottom of the sample tube.

[0007] The advantages and positive effects of the utility model are as follows: the utility model provides a portable zooplankton sampling device, which can collect zooplankton and plankton separately by arranging a sampling installation tube, a second collection net and a first collection net, thereby improving the sampling efficiency and the feasibility of sampling analysis; the first collection net is detachably connected to the sampling installation tube, which is convenient for replacing the collection net; by arranging an adapter and a torsion ring and rotating the torsion ring forward, the lower port of the collection net can be easily installed on the sample collection unit, and the installation is firm. When it is necessary to replace the collection net or remove the sample collection unit to facilitate the split transfer and transportation of the sampling device, the sample collection unit can be removed by rotating the torsion ring in the reverse direction, and the sampling device can be split and transferred to the sampling position or the collection net is replaced and then tightened. The sampling device is convenient for transfer and transportation, and the portability is strong and the replacement of the collection net is more convenient.

[0008] Preferably: the network port skeleton is annular in structure and its annular inner side surface is stepped, an upper mounting ring is installed on the annular step surface of the network port skeleton by screws, and the upper port edge of the second acquisition net is located between the upper mounting ring and the annular step surface of the network port skeleton.

[0009] Preferably: it also includes a buckle structure installed on the sampling installation tube, and a lower installation ring is detachably connected to the sampling installation tube through the buckle structure; and a buckle convex ring that is buckled with the buckle structure is arranged on the bottom surface of the lower installation ring.

[0010] Preferably: the sampling mounting tube comprises a mounting tube body, the mesh frame is mounted at the upper opening of the mounting tube body, the lower end of the mounting tube body is folded radially outward to form a mounting flange, and the snap-fit ​​structure is mounted on the mounting flange.

[0011] Preferably: the snap-on structure includes a snap-on hinge seat fixed on the mounting flange, a C-shaped snap-on member is hinged on the snap-on hinge seat through a pin shaft, and a snap-on protrusion that is snap-on to a snap-on convex ring is arranged on the side of the C-shaped snap-on member; and also includes a paddle arranged at the lower end of the C-shaped snap-on member.

[0012] Preferably: multiple groups of second connecting ears are installed on the mesh frame and the lower mounting ring, multiple groups of first connecting ears are arranged on each sample collection unit, and connecting ropes are connected between the corresponding first connecting ears and the second connecting ears.

[0013] Preferably, the counterweight is mounted on the adapter.

[0014] Preferably: a side mounting sleeve is welded on the upper part of the outer peripheral wall of the sampling mounting tube, and an internal thread is provided at the center of the side mounting sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main partial cross-sectional structure of the utility model;

[0016] Figure 2 yes Figure 1 A schematic diagram of the enlarged area in FIG.

[0017] Figure 3 yes Figure 1 An enlarged schematic diagram of the sample collection unit in FIG.

[0018] In the figure: 1. switch valve; 2. sample tube; 3. adapter; 4. first connecting ear; 5. torsion ring; 6. connecting rope; 7. first collection net; 8. second connecting ear; 9. lower mounting ring; 9-1. snap-fit ​​convex ring; 10. snap-fit ​​structure; 10-1. pick; 10-2. snap-fit ​​convex block; 10-3. C-type snap part; 10-4. snap-fit ​​hinge seat; 11. sampling mounting tube; 11-1. mounting tube body; 11-2. mounting flange; 12. net mouth frame; 13. spring buckle; 14. hanging rope; 15. mounting ring; 16. upper mounting ring; 17. side mounting sleeve; 18. second collection net. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are described in detail as follows:

[0020] See also Figure 1The portable zooplankton sampling device of the utility model comprises a sampling installation tube 11, a mesh frame 12 is fixedly connected to the upper opening of the sampling installation tube 11, and a second collection net 18 is detachably mounted on the mesh frame 12. In this embodiment, the mesh frame 12 is annular in structure and its inner side surface is stepped. An upper mounting ring 16 is mounted on the annular step surface of the mesh frame 12 by screws, and the upper port edge of the second collection net 18 is located between the upper mounting ring 16 and the annular step surface of the mesh frame 12.

[0021] When installing the second collection net 18, the edge of the upper open end of the second collection net 18 is fitted on the annular step surface of the mesh frame 12, and then the upper mounting ring 16 is pressed on the edge of the open end of the second collection net 18. After the bolt is passed through the through hole on the upper mounting ring 16 and the edge of the open end of the second collection net 18, the end of the bolt is threadedly connected to the threaded hole opened on the mesh frame 12, so that the head of the bolt is pressed on the upper mounting ring 16, so that the upper mounting ring 16 presses the edge of the open end of the second collection net 18 on the annular step surface of the mesh frame 12, thereby reducing the gap between the open end of the second collection net 18 and the annular step surface of the mesh frame 12, and preventing plankton from flowing into the first collection net 7 mentioned below from the gap between the open end of the second collection net 18 and the annular step surface of the mesh frame 12.

[0022] like Figure 1 As shown, in order to improve the sampling efficiency of the sampling device and avoid the mixed sampling of zooplankton and plankton in large quantities, the first collection net 7 is detachably connected to the lower open part of the sampling installation tube 11. In this embodiment, the aperture of the second collection net 18 is larger than the aperture of the first collection net 7. By utilizing the aperture difference between the first collection net 7 and the second collection net 18, when collecting plankton, larger plankton falls into the second collection net 18 for collection, while smaller plankton falls into the first collection net 7 for collection, thereby achieving the effect of collecting multiple types of plankton at the same time and improving the collection efficiency.

[0023] like Figure 1 As shown, in order to collect the collected plankton, a sample collection unit is detachably connected to the bottom of the first collection net 7 and the second collection net 18, and a counterweight is installed on the sample collection unit. Figure 3 In this embodiment, the sample collection unit includes an adapter 3 with an expanded opening at the upper end and a contracted opening at the lower end. An external thread is provided on the outer peripheral wall of the adapter 3 adjacent to the expanded end and a torsion ring 5 is screwed thereon. An internal thread is provided at the contracted end of the adapter 3 and a sample tube 2 is screwed thereon. A switch valve 1 is installed at the bottom of the sample tube 2. In addition, a counterweight is installed at the contracted end of the adapter 3.

[0024] During installation, the lower port of the collection net can be put on the flared end of the adapter 3, and then the torsion ring 5 can be rotated. Under the action of the external thread on the adapter 3, the torsion ring 5 moves along the center line of the adapter 3 toward its flared end. When the torsion ring 5 moves to be in close contact with the flared end of the adapter 3, one end of the collection net can be pressed, so that the collection net can be easily fixed, and the fixation is firm and not easy to loosen. When the collection net needs to be replaced or the sample collection unit needs to be disassembled for easy transfer and transportation, the torsion ring 5 can be rotated in the opposite direction to remove the sample collection unit, and the collection net can be replaced and then tightened, which makes it more convenient to replace the collection net and can effectively improve the sampling efficiency.

[0025] See also Figure 1 and Figure 2 To facilitate the disassembly of the first collection net 7, the present embodiment further includes a snap-fit ​​structure 10 installed on the sampling mounting tube 11, and a lower mounting ring 9 is detachably connected to the sampling mounting tube 11 through the snap-fit ​​structure 10, and a snap-fit ​​convex ring 9-1 snap-fitted with the snap-fit ​​structure 10 is provided on the bottom surface of the lower mounting ring 9.

[0026] Among them, the sampling installation tube 11 includes a mounting tube body 11-1, a mesh frame 12 is installed at the upper opening of the mounting tube body 11-1, the lower end of the mounting tube body 11-1 is folded radially outward to form a mounting flange 11-2, and the snap-on structure 10 is installed on the mounting flange 11-2.

[0027] like Figure 2 As shown, the snap-on structure 10 includes a snap-on hinge seat 10-4 fixed on the mounting flange 11-2, a C-shaped snap-on member 10-3 is hinged on the snap-on hinge seat 10-4 through a pin shaft, and a snap-on protrusion 10-2 snap-on to the side of the C-shaped snap-on member 10-3 is provided; it also includes a paddle 10-1 provided at the lower end of the C-shaped snap-on member 10-3 for the convenience of the operator to turn it.

[0028] In addition, in order to improve the installation stability of the first collection net 7, annular grooves are provided on the opposite surfaces of the installation flange 11-2 and the lower installation ring 9, and a pressing convex ring for pressing the edge of the collection net is provided in the annular groove, wherein the above-mentioned pressing convex ring can be made of hard rubber material. When the buckle structure 10 clamps and fixes the installation flange 11-2 of the lower installation ring 9 and the sampling installation tube 11, the two pressing convex rings can press the edge of the first collection net 7 on the surface corresponding to each pressing convex ring.

[0029] When installing the first collection net 7, fit the edge of the open end of the first collection net 7 onto the lower mounting ring 9, then rotate the C-shaped clip 10-3 downward, and use the C-shaped structure of the C-shaped clip 10-3 to detachably connect the lower mounting ring 9 and the mounting flange 11-2, that is, the bottom end of the C-shaped clip 10-3 clamps and fixes the lower mounting ring 9 and the mounting flange 11-2 of the sampling mounting tube 11, achieving a clamping effect, which is simple and convenient to use. When the snap structure 10 is clamped, the clamping convex ring 9-1 is used to limit the clamping convex block 10-2, preventing the C-shaped clip 10-3 in the snap structure 10 from rotating outward and disengaging, further increasing the stability of the connection of the snap structure 10.

[0030] like Figure 1 As shown, this embodiment also includes a plurality of spring buckles 13 detachably connected to the mesh frame 12 through slots provided on the outer peripheral wall, wherein the slots are provided in at least three groups and the plurality of groups of slots are distributed at equal angles in the circumferential direction. A suspension rope 14 is connected to each spring buckle 13, and a mounting ring 15 is connected to the intersection of each suspension rope 14. The suspension rope 14 can be quickly removed and hung up through the above arrangement.

[0031] In order to enrich the installation methods of the sampling device, a side mounting sleeve 17 is welded on the upper part of the outer peripheral wall of the sampling mounting tube 11, and an internal thread is provided at the center of the side mounting sleeve 17. In actual use, the end of the hand-held rod can be threadedly connected with the side mounting sleeve 17. The above installation method of sampling can make the operation more stable, not easy to stir the bottom mud in shallow water, and less sediment in the collected samples.

[0032] In actual use, it is found that when using traditional plankton nets for plankton sampling, when the collection net breaks, it is easy to cause the collection tube to fall off the net, causing property losses. Figure 1 As shown, in order to solve the above problem, multiple groups of second connecting ears 8 are installed on the net mouth frame 12 and the lower mounting ring 9, multiple groups of first connecting ears 4 are arranged on each sample collection unit, and connecting ropes 6 are connected between the corresponding first connecting ears 4 and second connecting ears 8. Through the above arrangement, after the collection net is broken, the sample collection unit can still be connected to the collection net, and the sample collection unit can be recovered.

[0033] Working principle:

[0034] During installation, the upper opening edge of the second collection net 18 can be fitted on the mesh frame 12. The specific installation process is as described above and will not be repeated here. After the upper opening end of the second collection net 18 is installed, the lower opening end of the second collection net 18 is installed on the sample collection unit. The specific installation process is as described above and will not be repeated here. If necessary, the connecting rope 6 can be used to connect the mesh frame 12 and the sample collection unit installed on the lower opening end of the second collection net 18, so as to facilitate the recovery of the above-mentioned sample collection unit when the second collection net 18 is damaged. The installation of the second collection net 18 is completed through the above-mentioned operation. Operation, then install the first collection net 7, that is, use the buckle structure 10 and the lower mounting ring 9 to install the edge of the upper open end of the first collection net 7 on the sampling mounting tube 11. The specific installation process is as described above and will not be repeated here. After completing the installation of the upper port of the first collection net 7, install the lower open end of the first collection net 7 on the corresponding sample collection unit. The specific installation process is as described above and will not be repeated here. Similarly, if necessary, the connecting rope 6 can be used to connect the lower mounting ring 9 and the sample collection unit installed at the lower open end of the first collection net 7, so as to facilitate the recovery of the above-mentioned sample collection unit when the first collection net 7 is damaged;

[0035] After completing the above-mentioned installation operation, the water sampling device is placed in the water and can be fixed using the lifting rope 14 and the installation lifting ring 15 to perform sampling operations. The sampling operation can also be performed using the hand-held rod screwed on the side mounting sleeve 17. The water body passes through the second collection net 18 and the first collection net 7 in turn. The second collection net 18 collects relatively large zooplankton, and relatively small phytoplankton passes through the second collection net 18 and is collected by the first collection net 7, thereby achieving the separation of zooplankton and phytoplankton.

Claims

1. A portable zooplankton sampling device, characterized in that: The sampling installation tube (11) comprises a sampling installation tube (11), a mesh frame (12) is fixedly connected to the upper opening of the sampling installation tube (11), a second collection net (18) is detachably mounted on the mesh frame (12), and a first collection net (7) is detachably connected to the lower opening of the sampling installation tube (11); the aperture of the second collection net (18) is larger than the aperture of the first collection net (7); A sample collection unit is detachably connected to the bottom of the first collection net (7) and the second collection net (18), and a counterweight is installed on the sample collection unit; it also includes a plurality of spring buckles (13) detachably connected to the net mouth frame (12) through slots opened on the outer peripheral wall, each spring buckle (13) is connected to a hanging rope (14), and a mounting hanging ring (15) is connected to the intersection end of each hanging rope (14); The sample collection unit comprises an adapter (3) with an open upper end in a flared shape and an open lower end in a constricted shape, an external thread adjacent to the flared end is provided on the outer peripheral wall of the adapter (3) and a torsion ring (5) is screwed on, an internal thread is provided at the constricted end of the adapter (3) and a sample tube (2) is screwed on, and a switch valve (1) is installed at the bottom of the sample tube (2).

2. The portable zooplankton sampling device according to claim 1, characterized in that: The mesh port frame (12) is annular in structure and its annular inner side surface is stepped; an upper mounting ring (16) is mounted on the annular step surface of the mesh port frame (12) by means of screws; and an upper port edge of the second collection net (18) is located between the upper mounting ring (16) and the annular step surface of the mesh port frame (12).

3. The portable zooplankton sampling device according to claim 1, characterized in that: It also includes a snap-fit ​​structure (10) installed on the sampling installation tube (11), and a lower installation ring (9) is detachably connected to the sampling installation tube (11) via the snap-fit ​​structure (10); and a snap-fit ​​convex ring (9-1) is provided on the bottom surface of the lower installation ring (9) and is snap-fitted with the snap-fit ​​structure (10).

4. The portable zooplankton sampling device according to claim 3, characterized in that: The sampling installation tube (11) comprises a installation tube body (11-1), a mesh frame (12) is installed at the upper opening of the installation tube body (11-1), the lower end of the installation tube body (11-1) is folded outwardly in the radial direction to form an installation flange (11-2), and the buckle structure (10) is installed on the installation flange (11-2).

5. The portable zooplankton sampling device according to claim 4, characterized in that: the buckle The structure (10) comprises a buckle hinge seat (10-4) fixedly connected to an installation flange (11-2), a C-shaped buckle (10-3) hingedly connected to the buckle hinge seat (10-4) via a pin shaft, a buckle protrusion (10-2) buckled with a buckle protrusion ring (9-1) arranged on the side of the C-shaped buckle (10-3), and a paddle (10-1) arranged at the lower end of the C-shaped buckle (10-3).

6. The portable zooplankton sampling device as claimed in claim 3 is characterized in that: A plurality of groups of second connecting ears (8) are installed on the mesh frame (12) and the lower mounting ring (9), a plurality of groups of first connecting ears (4) are arranged on each sample collection unit, and a connecting rope (6) is connected between the corresponding first connecting ears (4) and the second connecting ears (8).

7. The portable zooplankton sampling device according to claim 1, characterized in that: The counterweight is mounted on the adapter (3).

8. The portable zooplankton sampling device according to claim 1, characterized in that: A side mounting sleeve (17) is welded to the upper portion of the outer peripheral wall of the sampling mounting tube (11), and an internal thread is provided at the center of the side mounting sleeve (17).

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