A separation device suitable for different groups of plankton

Abstract

The present invention relates to a separation device suitable for different groups of plankton, comprising a sleeve, a plurality of A-type separation plates, and a plurality of B-type separation plates. The bottom end of the sleeve is provided with an internal thread, and the outer edges of each of the A-type separation plates and the B-type separation plates are respectively provided with external threads screwed with the internal threads of the sleeve, each of the A-type separation plates has a plurality of through grooves, and each of the B-type separation plates has a plurality of circular hole channels. Compared with the prior art, the advantages of the present invention are as follows: the traditional group separation method is manual picking, which is time-consuming and labor-intensive. The device for separating different groups of zooplankton innovatively developed by this patent can greatly save time and improve efficiency; the combination of A-type and B-type separation plates can realize the rapid separation of different groups such as hydromedusae, larvae, chaetognaths, and copepods.

Description

Technical Field

[0001] The invention relates to a separation device suitable for different groups of plankton, and is suitable for the rapid separation of different forms of plankton groups such as hydromedusae, larval fish, chaetognaths, copepods and the like. Background Art

[0002] Zooplankton is a key group in the marine ecosystem and an important indicator for marine ecological environment monitoring and investigation. Zooplankton is of various species and forms, including different groups such as large jellyfish, long-shaped chaetognaths, and oval-shaped copepods. According to the requirements of zooplankton surveys, zooplankton samples are mostly collected using special zooplankton nets, and the size of individuals usually ranges from a few hundred microns to several centimeters. After the zooplankton samples are collected, they need to be fixed with formaldehyde or other fixatives and taken back to the laboratory for observation and counting under a stereo microscope.

[0003] Due to the large number of zooplankton samples, the sampling observation method is often used in specific observation and counting. However, due to the great differences in the morphology and size of different zooplankton groups, the accuracy of zooplankton sampling is challenged. In addition, in the same microscope field of view, the presentation of morphological characteristics of species identification by zooplankton of different sizes is inconsistent. In order to facilitate the classification and identification of zooplankton of different sizes and improve the scientificity and accuracy of classification and identification, it is usually necessary to pick out large zooplankton such as jellyfish, larvae and chaetognaths before sampling observation, and then observe the remaining small zooplankton such as copepods. At present, the separation of large zooplankton is mainly done by manual picking one by one, which is extremely time-consuming and seriously restricts the efficiency of zooplankton classification and identification. Summary of the invention

[0004] In order to conveniently and quickly separate different groups of zooplankton, the present invention discloses a separation device suitable for different groups of zooplankton, and the technical solution adopted is:

[0005] This separation device is suitable for different groups of plankton, including a sleeve, multiple type A separation plates, and multiple type B separation plates. The bottom end of the sleeve is provided with an internal thread, and the outer edges of each type A separation plate and type B separation plate are respectively provided with external threads screwed to the internal thread of the sleeve. Each type A separation plate has multiple through grooves, and each type B separation plate has multiple circular hole channels.

[0006] Furthermore, it also includes washers, which are respectively sleeved below the external threads of the type A separation plate and the type B separation plate, and between the lower end surface of the sleeve and the upper end surface of the convex edge of the type A separation plate or the type B separation plate.

[0007] Furthermore, more than two semicircular fork openings are evenly arranged along the convex edges of the A-type separation plate and the B-type separation plate to facilitate their disassembly.

[0008] Furthermore, the A-type separation plate includes a circular ring body, on which a plurality of parallel partition bars are inserted, and the through grooves are formed between adjacent partition bars, and different spacings between the partition bars on the plurality of A-type separation plates form through grooves of different widths.

[0009] Further, the B-type separation plate comprises a circular plate body, on which a plurality of circular hole channels are evenly provided, the circular hole channels are "V"-shaped, comprising a shorter upper section and a longer lower section, the axes of the upper section and the lower section form an angle a, 120°≥a≥30°, and the inner diameters and / or angles a of the circular hole channels on the plurality of B-type separation plates are different. Preferably, 90°≥a≥60°.

[0010] Furthermore, the inner diameter of the sleeve is 9 cm, the wall thickness is 3 mm, and the height is 12 cm.

[0011] Compared with the prior art, the present invention has the following advantages: The traditional method of separating groups is manual picking, which is time-consuming and labor-intensive. The innovative device for separating different groups of zooplankton developed by this patent can greatly save time and improve efficiency. The combination of type A and type B separation plates can achieve rapid separation of different groups such as hydromedusae, larvae, chaetognaths, copepods, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic structural diagram of the sleeve of the present invention.

[0013] Figure 2 yes Figure 1 Schematic diagram of the structure from another perspective.

[0014] Figure 3 It is a structural schematic diagram of the A-type separation plate of the present invention.

[0015] Figure 4 yes Figure 3 Schematic diagram of the structure from another perspective.

[0016] Figure 5 yes Figure 3 Magnified cross-sectional view.

[0017] Figure 6 A schematic diagram of the structure of the sleeve of the present invention after being assembled with the A-type separation plate.

[0018] Figure 7 It is a structural schematic diagram of the B-type separation plate of the present invention.

[0019] Figure 8 yes Figure 7 Schematic diagram of the structure from another perspective.

[0020] Fig. 9 yes Figure 7 Magnified cross-sectional view.

[0021] Fig.10 A schematic diagram of the structure of the sleeve of the present invention after being assembled with the B-type separation plate. DETAILED DESCRIPTION

[0022] The present invention is further described in detail with reference to the following examples.

[0023] It should be noted that the following content further describes this patent in detail in conjunction with specific embodiments, but it cannot be determined that this embodiment is limited to this. Under the guidance of the embodiments, technicians in this field can make various improvements or optimizations based on this embodiment, and these improvements or optimizations fall within the scope of protection of the present invention.

[0024] As shown in the figure, the present invention is a device suitable for separating different groups of zooplankton, including a sleeve and a separation plate. The separation plate includes two types: type A separation plate and type B separation plate. The type A separation plate adopts a strip-shaped channel to effectively intercept large groups of jellyfish, larvae and juvenile fish, while ensuring the smooth passage of groups such as chaetognaths and copepods. The type B separation plate adopts a "V"-shaped channel design, which can effectively intercept long-shaped zooplankton groups such as chaetognaths, while ensuring the smooth passage of small elliptical zooplankton such as copepods. The separation plate and the sleeve are made of materials such as transparent plastic, an internal thread is set at the lower end of the sleeve, and an external thread is set at the outer edge of the separation plate, and the sleeve and the classification plate are connected together by threads. The thickness of the A-type separation plate is 2cm, and a 304 stainless steel spacer with a diameter of 1mm is arranged in parallel in the center. The spacer is fixed in the center of the A-type separation plate, and a spacing of 3mm is maintained between the spacers; the thickness of the B-type separation plate is 2cm, and a "V"-shaped channel is arranged inside. The channel runs through the entire separation plate, and the inner wall of the channel is polished smooth. The channel is divided into two parts, the upper part is shorter and the lower part is longer. The channel diameter is 3mm, and the angle between the upper and lower channels is 90°.

[0025] Specific usage:

[0026] First, screw the A-type separation plate to the sleeve and fix it. Connect an empty beaker at the bottom. Mix the zooplankton sample and pour it into the sleeve. Immerse the A-type separation plate up and down from the liquid surface in the beaker. Repeat the operation many times to ensure that all small zooplankton such as chaetognaths and copepods pass through the A-type separation plate. Lift the A-type separation plate from the liquid surface and spirally separate it from the sleeve. Turn the A-type separation plate over and place it in an empty culture dish. Rinse it gently with clean water to rinse off large zooplankton such as hydrojellyfish and juvenile fish. Then screw the B-type separation plate onto the sleeve and place it on top of a new beaker. Pour the liquid containing copepods and other zooplankton filtered by the A-type separation plate into the sleeve. Repeatedly leaching the B-type separation plate in the beaker until small individuals such as copepods completely pass through the "V"-shaped channel of the B-type separation plate. The liquid filtered by the B-type separation plate in the beaker below contains small zooplankton groups such as copepods, and long zooplankton such as chaetognaths will be effectively retained by the "V"-shaped channel of the B-type separation plate. Separate the B-type separation plate from the sleeve, turn it over and place it in a new culture dish, rinse it gently with clean water to rinse off the chaetognaths, thereby achieving rapid and efficient separation of different zooplankton groups such as hydromedusae, larvae, chaetognaths and copepods.

Claims

1. A separation device suitable for different groups of plankton, Features: It comprises a sleeve (1), a plurality of A-type separation plates (2), and a plurality of B-type separation plates (3), wherein the bottom end of the sleeve (1) is provided with an internal thread, and the outer edges of each of the A-type separation plates (2) and the B-type separation plates (3) are respectively provided with external threads that are screwed to the internal threads of the sleeve (1), each of the A-type separation plates (2) has a plurality of through grooves (21), and each of the B-type separation plates (3) has a plurality of circular hole channels (31); The B-type separation plate (3) comprises a circular plate body (30), on which a plurality of circular hole channels (31) are evenly arranged, the circular hole channels (31) being "V"-shaped and comprising a shorter upper section (311) and a longer lower section (312), the axes of the upper section (311) and the lower section (312) forming an angle a, 120°≥a≥30°, and the inner diameters and / or angles a of the circular hole channels (31) on the plurality of B-type separation plates (3) are different; The A-type separation plate (2) comprises a circular ring body (20), a plurality of mutually parallel spacers (22) are inserted into the circular ring body (20), and the through grooves (21) are formed between adjacent spacers. The different spacings between the spacers (22) on the plurality of A-type separation plates (2) form the through grooves (21) of different widths.

2. A separation device suitable for different groups of plankton according to claim 1, Features: It also includes a gasket (4) which is respectively sleeved below the external threads of the A-type separation plate (2) and the B-type separation plate (3), and between the lower end surface of the sleeve (1) and the upper end surface of the convex edge (23) of the A-type separation plate (2) or the B-type separation plate (3).

3. A separation device suitable for different groups of plankton according to claim 2, Features: Two or more semicircular fork openings (32) are evenly arranged along the convex edges (23) of the A-type separation plate (2) and the B-type separation plate (3) to facilitate their disassembly.

4. A separation device suitable for different groups of plankton according to claim 1, Features: 90°≥a≥60°。 5. A separation device suitable for different groups of plankton according to claim 1 or 2, Features: The sleeve (1) has an inner diameter of 9 cm, a wall thickness of 3 mm and a height of 12 cm.

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