Benthic invertebrate flotation device

Abstract

The utility model relates to a demersal invertebrate flotation device which comprises a flotation frame, an installation frame and a supporting frame, a first screen plate is arranged in a flotation cavity of the flotation frame, the flotation frame is sleeved with the first screen plate in cooperation with the installation frame, and an intercepting screen plate on the installation frame is aligned with the first screen plate. According to the screening device for the benthic invertebrates, due to the fact that the blocking net plate is arranged in the screening device, and the hole diameter of the blocking net holes is larger than that of the first screening net holes, when the benthic invertebrates are sorted, gravels and aquatic plant residues large in size can be blocked through the blocking net plate firstly, then further screening is conducted through the first screening net plate, non-target substances mixed in the benthic invertebrates can be effectively reduced, and the screening efficiency is improved. According to the benthic invertebrate collecting device, the possibility that benthic invertebrates are attached and hidden is reduced, the sorting difficulty is reduced, the sorting efficiency of the benthic invertebrates is improved, and therefore the collecting efficiency of benthic invertebrate samples is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of aquatic organism separation equipment, and in particular to a flotation device for benthic invertebrates. Background Technology

[0002] Macrobenthic invertebrates refer to aquatic invertebrates that inhabit the bottom of water bodies or attach to aquatic plants and rocks. They include annelids, mollusks, arthropods, etc. As intermediate links in the aquatic food chain, they can promote material cycling and energy flow, and are sensitive to changes in water quality. They are known as "underwater sentinels". The species composition and community structure of macrobenthic invertebrates are closely related to the quality of the water environment and are important indicators for assessing the health of aquatic ecosystems.

[0003] Sampling of large benthic invertebrates is a crucial foundational task in the ecological survey and monitoring of rivers, lakes, reservoirs, ponds, and other aquatic bodies. During sampling, benthic animals are typically collected along with bottom sediment, then placed in a washing tank to separate the sediment from the animals. A flotation device is then used to wash out the large benthic invertebrate samples. However, existing flotation devices have simple structures, and when the collected samples are washed on the flotation screen, they are often mixed with gravel, aquatic plant debris, and large differences in size between living and non-living organisms. Benthic invertebrates easily attach to and hide within these materials, making sorting difficult and significantly impacting the efficiency of benthic invertebrate sample collection. Utility Model Content

[0004] Therefore, it is necessary to provide a flotation device for benthic invertebrates.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A flotation device for benthic invertebrates, comprising:

[0006] A flotation frame, wherein a flotation cavity is provided on the flotation frame, and a first screen plate is provided in the flotation cavity, wherein a plurality of first screen holes are provided on the first screen plate;

[0007] The mounting frame is sleeved on the first end of the flotation frame. An intercepting mesh plate is provided on the mounting frame. The intercepting mesh plate is aligned with the first screen plate. The intercepting mesh plate has multiple intercepting mesh holes, and the diameter of the intercepting mesh holes is larger than the diameter of the first screen hole.

[0008] A support frame is connected to the second end of the float frame.

[0009] In one embodiment, the first end of the mounting bracket is located inside the flotation chamber, and the second end of the mounting bracket is provided with an abutment ring, which movably abuts against the outer edge of the flotation chamber.

[0010] In one embodiment, a limiting protrusion is provided on the first surface of the abutment ring, and a limiting groove is provided on the first end of the float frame, with the limiting protrusion fitting into the limiting groove.

[0011] In one embodiment, a first holding protrusion is provided on the second surface of the abutment ring.

[0012] In one embodiment, a first slot is provided on the flotation frame, the first slot is connected to the flotation chamber, a first limiting ring plate is provided in the flotation chamber, the first screen plate is inserted into the flotation chamber through the first slot, and the four edges of the first screen plate abut against the first limiting ring plate.

[0013] In one embodiment, the first screen plate is provided with a second holding protrusion.

[0014] In one embodiment, the benthic invertebrate flotation device further includes: a second screen plate, the second screen plate having a plurality of second screen holes, the aperture of the second screen holes being smaller than the aperture of the first screen holes; a second slot being provided on the flotation frame, the second slot communicating with the flotation chamber; a second limiting ring plate being provided in the flotation chamber; the second screen plate being inserted into the flotation chamber through the second slot, and the four edges of the second screen plate abutting against the second limiting ring plate.

[0015] In one embodiment, the second screen plate is provided with a third holding protrusion.

[0016] In one embodiment, the float frame is provided with multiple reinforcing bars.

[0017] In one embodiment, the support frame includes: a first support ring, a second support ring, and a plurality of support rods, wherein the first support ring and the second support ring are spaced apart, a first end of each support rod is connected to the first support ring, a second end of each support rod is connected to the second support ring, and the first support ring is connected to the second end of the float frame.

[0018] The beneficial effects of this utility model are as follows: The benthic invertebrate flotation device provided by this utility model has a first screen plate set in the flotation chamber of the flotation frame, which is fitted onto the flotation frame with a mounting frame. The intercepting screen plate on the mounting frame is aligned with the first screen plate, and the aperture of the intercepting screen is larger than that of the first screen plate. In this way, when sorting benthic invertebrates, larger stones and aquatic plant debris can be intercepted by the intercepting screen plate first, and then further screened by the first screen plate. This can effectively reduce non-target substances mixed in with benthic invertebrates, reduce the possibility of benthic invertebrates attaching or hiding, reduce the sorting difficulty, improve the sorting efficiency of benthic invertebrates, and thus improve the collection efficiency of benthic invertebrate samples. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of a benthic invertebrate flotation device according to one embodiment.

[0021] Figure 2 This is a three-dimensional exploded structural diagram of a benthic invertebrate flotation device according to one embodiment.

[0022] In the attached diagram, 10 is a flotation device for benthic invertebrates; 100 is a flotation frame; 101 is a flotation chamber; 110 is a first slot; 120 is a first limiting ring plate; 130 is a second slot; 140 is a second limiting ring plate; 200 is a first screen plate; 210 is a first screen hole; 220 is a second holding protrusion; 300 is a mounting frame; 310 is an abutment ring; 320 is a first holding protrusion; 400 is an intercepting screen plate; 410 is an intercepting screen hole; 500 is a support frame; 510 is a first support ring; 520 is a second support ring; 530 is a support rod; 600 is a second screen plate; 610 is a second screen hole; and 620 is a third holding protrusion. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0024] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] In one embodiment, such as Figure 1 and Figure 2 As shown, a benthic invertebrate flotation device 10 includes: a flotation frame 100, a mounting frame 300, and a support frame 500. The flotation frame 100 has a flotation cavity 101, and a first screen plate 200 is disposed in the flotation cavity 101. The first screen plate 200 has a plurality of first screen holes 210. The mounting frame 300 is sleeved on the first end of the flotation frame 100. An intercepting screen plate 400 is disposed on the mounting frame 300. The intercepting screen plate 400 is aligned with the first screen plate 200. The intercepting screen plate 400 has a plurality of intercepting screen holes 410, and the diameter of the intercepting screen holes 410 is larger than the diameter of the first screen holes 210. The support frame 500 is connected to the second end of the flotation frame 100.

[0026] In this embodiment, the support frame 500 is connected to the flotation frame 100 and can support the flotation frame 100. The flotation cavity 101 is set through both ends of the flotation frame 100. A first screen plate 200 is set in the flotation cavity 101 of the flotation frame 100. The mounting frame 300 is sleeved on the flotation frame 100, and the intercepting net plate 400 on the mounting frame 300 is aligned with the first screen plate 200. The intercepting net plate 400 is located above the first screen plate 200. The aperture of the intercepting net hole 410 of the intercepting net plate 400 is larger than the aperture of the first screen hole 210 of the first screen plate 200, so that benthic invertebrates in the water can move to the first screen plate 200 through the intercepting net hole 410, while some larger pebbles and aquatic plant debris are trapped on the intercepting net plate 400.

[0027] In this embodiment, when sorting benthic invertebrates, water mixed with gravel, aquatic plant debris, and benthic invertebrates passes sequentially through the intercepting net plate 400 and the first screen plate 200. The intercepting net plate 400 first intercepts larger gravel and aquatic plant debris, and then the first screen plate 200 further filters the water, allowing the benthic invertebrates to remain on the first screen plate 200, while the water is filtered out through the first screen mesh 210. At this point, the mounting frame 300 and the intercepting net plate are removed. After 400, the first sieve plate 200 contains biological and non-biological materials of similar size. By observing the peristalsis of benthic invertebrates, benthic invertebrates can be effectively sorted out. By setting up the mounting frame 300 and the intercepting sieve plate 400, non-target materials mixed in with benthic invertebrates can be effectively reduced, the possibility of benthic invertebrates attaching or hiding can be reduced, the sorting difficulty can be reduced, and the sorting efficiency of benthic invertebrates can be improved, thereby improving the collection efficiency of benthic invertebrate samples.

[0028] In one embodiment, such as Figure 2 As shown, the first end of the mounting frame 300 is located inside the flotation chamber 101, and the second end of the mounting frame 300 is provided with an abutment ring 310, which movably abuts against the outer edge of the flotation chamber 101. Specifically, the flotation frame 100 has a circular cross-sectional shape, and the mounting frame 300 has a correspondingly circular cross-sectional shape. The width of the first end of the mounting frame 300 is smaller than the width of the flotation chamber 101. The abutment ring 310 is provided on the second end of the mounting frame 300, and abuts against the first end of the flotation frame 100. This allows the mounting frame 300 to be stably fitted onto the first end of the flotation frame 100, and limits the position of the first end of the mounting frame 300 within the flotation chamber 101, so that the intercepting screen plate 400 on the mounting frame 300 is spaced apart from the first screen plate 200 within the flotation chamber 101.

[0029] In one embodiment, a limiting protrusion is provided on the first surface of the abutment ring 310, and a limiting groove is provided on the first end of the float frame 100, with the limiting protrusion fitting into the limiting groove. Specifically, the limiting protrusion is an annular protrusion structure, and the limiting groove is correspondingly an annular groove. When the mounting bracket 300 is sleeved on the first end of the float frame 100, the limiting protrusion is fitted into the limiting groove, which can better keep the position between the mounting bracket 300 and the float frame 100 relatively stationary, thereby further enabling the mounting bracket 300 to be stably sleeved on the first end of the float frame 100.

[0030] In one embodiment, such as Figure 2As shown, a first holding protrusion 320 is provided on the second surface of the abutment ring 310. Specifically, there are two first holding protrusions 320, which are spaced apart on the second surface of the abutment ring 310. By providing the first holding protrusions 320, it is convenient for the operator to hold the first holding protrusions 320 to assemble or disassemble the mounting frame 300, that is, to put the mounting frame 300 on the first end of the float frame 100 or to remove the mounting frame 300 from the float frame 100, which can effectively clean the intercepted objects on the interceptor plate 400 of the mounting frame 300.

[0031] In one embodiment, such as Figure 2 As shown, the flotation frame 100 is provided with a first slot 110, which is connected to the flotation chamber 101. A first limiting ring plate 120 is provided in the flotation chamber 101. The first screen plate 200 is inserted into the flotation chamber 101 through the first slot 110, and the four edges of the first screen plate 200 abut against the first limiting ring plate 120. Specifically, the opening direction of the first slot 110 is perpendicular to the opening direction of the flotation chamber 101. The position of the first limiting ring plate 120 in the flotation chamber 101 is adapted to the opening position of the first slot 110 on the flotation frame 100. The first screen plate 200 can be inserted into the flotation chamber 101 through the first slot 110 and stably located in the flotation chamber 101 through the first limiting ring plate 120. In this way, the first screen plate 200 can be detachably set on the flotation frame 100, which makes it easy to replace and clean the first screen plate 200. For example, the first screen plate 200 with different apertures of the first screen mesh 210 can be replaced according to the size of the benthic invertebrates to be collected.

[0032] In one embodiment, such as Figure 2 As shown, the first screen plate 200 is provided with a second holding protrusion 220. Specifically, when the first screen plate 200 is inserted into the flotation chamber 101 through the first slot 110, the second holding protrusion 220 is located on the outside of the flotation frame 100. By providing the second holding protrusion 220, it is convenient for the operator to hold the second holding protrusion 220 to assemble or disassemble the first screen plate 200, that is, to easily insert the first screen plate 200 into the flotation chamber 101 or remove it from the flotation frame 100, so that it can be easily replaced and cleaned.

[0033] In one embodiment, such as Figure 2As shown, the benthic invertebrate flotation device 10 further includes: a second screen plate 600, on which a plurality of second screen holes 610 are provided, the aperture of the second screen holes 610 being smaller than the aperture of the first screen holes 210; a second slot 130 is provided on the flotation frame 100, the second slot 130 communicating with the flotation chamber 101; a second limiting ring plate 140 is provided in the flotation chamber 101; the second screen plate 600 is inserted into the flotation chamber 101 through the second slot 130, and the four edges of the second screen plate 600 abut against the second limiting ring plate 140. Specifically, the second screen plate 600 is aligned with the first screen plate 200, and is located below the first screen plate 200. The aperture of the second screen hole 610 of the second screen plate 600 is smaller than the aperture of the first screen hole 210 of the first screen plate 200. This allows some smaller benthic invertebrates in the water to move through the first screen hole 210 to the second screen plate 600, while some larger benthic invertebrates are trapped on the interception screen plate 400, thus separating benthic invertebrate samples of different sizes. Simultaneously, the second screen plate 600 can be detachably mounted on the flotation frame 100, facilitating replacement and cleaning.

[0034] In one embodiment, such as Figure 2 As shown, the second screen plate 600 is provided with a third holding protrusion 620. Specifically, when the second screen plate 600 is inserted into the flotation chamber 101 through the second slot 130, the third holding protrusion 620 is located on the outside of the flotation frame 100. By providing the third holding protrusion 620, it is convenient for the operator to hold the third holding protrusion 620 to assemble or disassemble the second screen plate 600, so that the second screen plate 600 can be easily inserted into the flotation chamber 101 or removed from the flotation frame 100 for easy replacement and cleaning.

[0035] In one embodiment, the flotation frame 100 is provided with a plurality of reinforcing strips. Specifically, the reinforcing strips are spaced apart on the outer surface of the flotation frame 100, which can improve the overall structural strength of the flotation frame 100, giving the flotation frame 100 better structural stability and ensuring that the benthic invertebrate flotation device 10 can work continuously and stably.

[0036] In one embodiment, such as Figure 2As shown, the support frame 500 includes a first support ring 510, a second support ring 520, and a plurality of support rods 530. The first support ring 510 and the second support ring 520 are spaced apart. The first end of each support rod 530 is connected to the first support ring 510, and the second end of each support rod 530 is connected to the second support ring 520. The first support ring 510 is connected to the second end of the flotation frame 100. Specifically, the hollow frame structure formed by the connection of the first support ring 510, the second support ring 520, and the plurality of support rods 530 can effectively support the flotation frame 100 while also facilitating the discharge of water filtered from the flotation frame 100 into the external environment.

[0037] Compared with the prior art, the present invention has at least the following advantages:

[0038] This utility model provides a benthic invertebrate flotation device. A first screen plate is installed inside the flotation chamber of a flotation frame, and a mounting frame is fitted onto the flotation frame. An intercepting screen plate on the mounting frame is aligned with the first screen plate, and the aperture of the intercepting screen is larger than that of the first screen plate. This allows for the sorting of benthic invertebrates by first intercepting larger stones and aquatic plant debris through the intercepting screen plate, followed by further screening through the first screen plate. This effectively reduces non-target substances mixed in with the benthic invertebrates, lowers the possibility of attachment and hiding, reduces sorting difficulty, and improves sorting efficiency, thereby increasing the collection efficiency of benthic invertebrate samples.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A flotation device for benthic invertebrates, characterized in that, include: A flotation frame, wherein a flotation cavity is provided on the flotation frame, and a first screen plate is provided in the flotation cavity, wherein a plurality of first screen holes are provided on the first screen plate; The mounting frame is sleeved on the first end of the flotation frame. An intercepting mesh plate is provided on the mounting frame. The intercepting mesh plate is aligned with the first screen plate. The intercepting mesh plate has multiple intercepting mesh holes, and the diameter of the intercepting mesh holes is larger than the diameter of the first screen hole. A support frame is connected to the second end of the float frame.

2. The benthic invertebrate flotation device according to claim 1, characterized in that, The first end of the mounting frame is located inside the flotation chamber, and the second end of the mounting frame is provided with an abutment ring, which movably abuts against the outer edge of the flotation chamber.

3. The benthic invertebrate flotation device according to claim 2, characterized in that, A limiting protrusion is provided on the first surface of the abutment ring, and a limiting groove is provided on the first end of the float frame, with the limiting protrusion fitting into the limiting groove.

4. The benthic invertebrate flotation device according to claim 3, characterized in that, A first holding protrusion is provided on the second surface of the abutment ring.

5. The benthic invertebrate flotation device according to claim 1, characterized in that, The flotation frame has a first slot, which is connected to the flotation chamber. A first limiting ring plate is provided in the flotation chamber. The first screen plate is inserted into the flotation chamber through the first slot, and the four edges of the first screen plate abut against the first limiting ring plate.

6. The benthic invertebrate flotation device according to claim 5, characterized in that, The first screen plate is provided with a second holding protrusion.

7. The benthic invertebrate flotation device according to claim 5, characterized in that, Also includes: The second screen plate has multiple second screen holes, the diameter of which is smaller than that of the first screen hole. The flotation frame has a second slot, which is connected to the flotation chamber. A second limiting ring plate is provided in the flotation chamber. The second screen plate is inserted into the flotation chamber through the second slot, and the four edges of the second screen plate abut against the second limiting ring plate.

8. The benthic invertebrate flotation device according to claim 7, characterized in that, The second screen plate is provided with a third holding protrusion.

9. The benthic invertebrate flotation device according to claim 8, characterized in that, The float frame is provided with multiple reinforcing bars.

10. The benthic invertebrate flotation device according to claim 1, characterized in that, The support frame includes a first support ring, a second support ring, and a plurality of support rods. The first support ring and the second support ring are spaced apart. The first end of each support rod is connected to the first support ring, and the second end of each support rod is connected to the second support ring. The first support ring is connected to the second end of the float frame.

Images