A benthic invertebrate screening device

Abstract

The utility model relates to a kind of benthic invertebrate screening devices, comprising: screening bucket, screening mechanism and sampling mechanism, by being provided with screening mechanism in the screening cavity of screening bucket, the mounting post of screening mechanism is installed on the bottom of screening cavity, rotating ring is rotatably arranged on mounting post, stirring paddle is connected on rotating ring, and water flow containing benthic invertebrate and bottom mud is transported to screening cavity by cooperating sampling pump and delivery pipe, under the impact of water flow, stirring paddle can be rotated in screening cavity, and the shear force and eddy effect generated by stirring paddle rotation can make benthic invertebrate and bottom mud separate, improve the collection efficiency of benthic invertebrate sample.

Description

Technical Field

[0001] This utility model relates to the technical field of aquatic organism screening and washing equipment, and in particular to a screening and washing 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 macrobenthic 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 and then placed in a sieving device to separate the sediment from the animals. The macrobenthic invertebrate samples are then washed out using a sieve. However, existing sieving devices are simple in structure and fail to effectively separate the benthic animals from the sediment, resulting in the animals being trapped in the sediment and significantly impacting the collection efficiency of macrobenthic invertebrate samples. Utility Model Content

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

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A benthic invertebrate screening and washing device, comprising:

[0006] A sieving and washing barrel, wherein a sieving and washing chamber is provided on the sieving and washing barrel, a water inlet is provided on the first end of the sieving and washing barrel, and a drain is provided on the second end of the sieving and washing barrel;

[0007] A screening and washing mechanism, comprising: a mounting column, a rotating ring, and a stirring paddle; the mounting column is disposed within the screening and washing chamber; the rotating ring is rotatably disposed on the mounting column; and the stirring paddle is connected to the rotating ring.

[0008] A sampling mechanism, comprising a sampling pump and a delivery pipe, wherein the sampling pump is connected to a first end of the delivery pipe and the second end of the delivery pipe is connected to the water inlet.

[0009] In one embodiment, the mounting post has a rotating ring groove, and the rotating ring is rotatably fitted inside the rotating ring groove.

[0010] In one embodiment, the stirring paddle includes a fixed ring and a plurality of blades, the fixed ring being sleeved on the rotating ring, and each of the blades being evenly distributed on the outer surface of the fixed ring.

[0011] In one embodiment, the screening and washing mechanism further includes: a locking bolt, a through hole on the fixed ring, a threaded hole on the rotating ring, and the locking bolt passing through the through hole and screwed into the threaded hole.

[0012] In one embodiment, the first end of the propeller is connected to the retaining ring, and the width of the first end of the propeller is smaller than the width of the second end of the propeller.

[0013] In one embodiment, the blade is gradually curved from the first end to the second end of the blade.

[0014] In one embodiment, the number of agitators is set to multiple, and the size of the blades of each agitator gradually decreases along the direction from the water inlet to the water outlet.

[0015] In one embodiment, the screening and washing mechanism further includes: a plurality of stirring plates, each of which is evenly distributed on the rotating ring near the bottom of the screening and washing chamber.

[0016] In one embodiment, a plurality of mounting blocks are arranged around the bottom of the screening chamber, each mounting block having a mounting groove, and a plurality of fitting blocks are arranged around the first end of the mounting column, each fitting block fitting into a mounting groove.

[0017] In one embodiment, the washing drum is rotatably equipped with a handle.

[0018] The beneficial effects of this utility model are as follows: The benthic invertebrate screening and washing device provided by this utility model has a screening and washing mechanism set in the screening and washing chamber of the screening and washing tank. The mounting column of the screening and washing mechanism is installed on the bottom of the screening and washing chamber. A rotating ring is rotatably set on the mounting column, and a stirring paddle is connected to the rotating ring. With the help of a sampling pump and a delivery pipe, water containing benthic invertebrates and bottom sediment is transported to the screening and washing chamber. Under the impact of the water flow, the stirring paddle can rotate in the screening and washing chamber. The shear force and eddy current generated by the rotation of the stirring paddle can separate the benthic invertebrates from the bottom sediment, thereby improving 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 A schematic diagram of a benthic invertebrate screening and washing device according to one embodiment;

[0021] Figure 2 This is a schematic cross-sectional view of a benthic invertebrate sieving device according to one embodiment.

[0022] In the attached diagram, 10 is a benthic invertebrate screening and washing device; 100 is a screening and washing tank; 101 is a screening and washing chamber; 110 is a water inlet; 120 is a drain; 200 is a screening and washing mechanism; 210 is a mounting column; 220 is a rotating ring; 230 is a stirring paddle; 231 is a fixing ring; 232 is a paddle blade; 240 is a locking bolt; 300 is a sampling mechanism; 310 is a sampling pump; 320 is a delivery pipe; 400 is a handle; 510 is a mounting block; 511 is a mounting groove; and 520 is a fitting block. 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 2As shown, a benthic invertebrate screening and washing device 10 includes: a screening and washing tank 100, a screening and washing mechanism 200, and a sampling mechanism 300. The screening and washing tank 100 has a screening and washing chamber 101. A water inlet 110 is provided at the first end of the screening and washing tank 100, and a drain 120 is provided at the second end of the screening and washing tank 100. The screening and washing mechanism 200 includes: a mounting column 210, a rotating ring 220, and a stirring paddle 230. The mounting column 210 is disposed in the screening and washing chamber 101, the rotating ring 220 is rotatably disposed on the mounting column 210, and the stirring paddle 230 is connected to the rotating ring 220. The sampling mechanism 300 includes: a sampling pump 310 and a delivery pipe 320. The sampling pump 310 is connected to the first end of the delivery pipe 320, and the second end of the delivery pipe 320 is connected to the water inlet 110.

[0026] In this embodiment, a screening chamber 101 is provided on the screening tank 100. An inlet is provided on the inlet end 110, and a outlet is provided on the outlet end 120. The inlet and outlet are connected to the screening chamber 101. Water mixed with benthic invertebrates and bottom sediment enters the screening chamber 101 through the inlet and then flows upwards to the outlet for discharge. A screening mechanism 200 is provided within the screening chamber 101 of the screening tank 100. The mounting column 210 of the screening mechanism 200 is installed on the bottom of the screening chamber 101. A rotating ring 220 is rotatably mounted on the mounting column 210, and a stirring paddle 230 is connected to the rotating ring 220. The stirring paddle 230 is independently rotatably mounted on the mounting column 210, cooperating with the screening... The sample pump 310 and the delivery pipe 320 deliver water containing benthic invertebrates and sediment to the screening chamber 101 through the inlet. Under the impact of the water flow, the stirring paddle 230 rotates in the screening chamber 101. The shear force and eddy current generated by the rotation of the stirring paddle 230 can separate the benthic invertebrates from the sediment. The separated benthic invertebrates can be discharged from the screening chamber 101 through the drain outlet with the water flow. With the interception of the external screen, the sample can be collected. That is, the sediment clumps can be fully stirred into a loose state, so that the benthic invertebrates are exposed to the water flow, and the loose sediment can pass through the screen better, thus improving the collection efficiency of benthic invertebrate samples.

[0027] In one embodiment, the water inlet on the inlet end is oriented offset from the central axis of the screening and washing tank. This allows the water containing benthic invertebrates and sediment to be pumped into the screening and washing chamber through the inlet by the sampling pump and the delivery pipe at an inclined angle. This facilitates the formation of a spiral flow within the screening and washing chamber, which not only better drives the stirring paddle to rotate within the chamber, thus separating the benthic invertebrates from the sediment, but also allows the separated benthic invertebrates to be discharged from the screening and washing chamber from bottom to top through the drain outlet.

[0028] In one embodiment, the mounting column 210 has a rotating annular groove, and the rotating ring 220 is rotatably fitted within the rotating annular groove. Specifically, the number of rotating annular grooves is equal to the number of rotating rings 220, and the rotating annular grooves are evenly distributed on the mounting column 210. By providing rotating annular grooves, the size of the rotating annular grooves is adapted to the size of the rotating rings 220, which can provide a stable rotation track for the rotating rings 220, allowing the rotating rings 220 to rotate smoothly and not easily fall off, thereby enabling the stirring paddle 230 to be rotatably mounted on the mounting column 210.

[0029] In one embodiment, such as Figure 2 As shown, the stirring paddle 230 includes a fixed ring 231 and multiple blades 232. The fixed ring 231 is sleeved on the rotating ring 220, and the blades 232 are evenly distributed on the outer surface of the fixed ring 231. Specifically, the size of the fixed ring 231 is adapted to the size of the rotating ring 220. By sleeved on the rotating ring 220, the fixed ring 231 can achieve a reliable connection through an interference fit, thereby ensuring that the stirring paddle 230 rotates synchronously with the rotating ring 220. The multiple blades 232 are evenly distributed on the outer surface of the fixed ring 231, forming a symmetrical stirring structure, which can better generate shear force and eddies, disrupt the structure of the bottom sediment clumps, and promote the separation of benthic invertebrates from the bottom sediment.

[0030] In one embodiment, such as Figure 2 As shown, the screening and washing mechanism 200 further includes: a locking bolt 240; a through hole is provided on the fixed ring 231; and a threaded hole is provided on the rotating ring 220. The locking bolt 240 passes through the through hole and is screwed into the threaded hole. Specifically, the number of through holes is set to two or more, and the number of threaded holes, locking bolts 240, and through holes is equal. Each through hole is evenly distributed on the fixed ring 231. By having one end of the locking bolt 240 pass through the through hole and be screwed into the threaded hole, the fixed ring 231 can be more stably installed on the rotating ring 220 through a threaded connection, thereby better ensuring that the stirring paddle 230 rotates synchronously with the rotating ring 220.

[0031] In one embodiment, the first end of the paddle 232 is connected to the fixing ring 231, and the width of the first end of the paddle 232 is smaller than the width of the second end of the paddle 232. Specifically, by setting the width of the first end of the paddle 232 to be smaller than the width of the second end of the paddle 232, a paddle 232 structure with a gradually changing width can be formed. This reduces the moment of inertia at the connection between the first end of the paddle 232 and the fixing ring 231. The second end of the paddle 232 has a larger surface area, which not only facilitates autonomous rotation under the impact of water flow but also creates a larger stirring area, enhancing the stirring effect. This allows for better disruption of the sediment mass structure, facilitating the separation of benthic invertebrates from the sediment.

[0032] In one embodiment, the paddle 232 is gradually curved from its first end to its second end. Specifically, by setting the paddle 232 in a curved shape, it can not only achieve autonomous rotation under the impact of water flow, but also enhance the vertical mixing effect by inducing a spiral flow field, reduce the dead zone of mixing, produce a better mixing effect, and improve the separation efficiency of benthic invertebrates and bottom sediment.

[0033] In one embodiment, the number of stirring paddles 230 is set to multiple, and the size of the blades 232 of each stirring paddle 230 gradually decreases along the direction from the water inlet 110 to the water outlet 120. Specifically, along the direction from the water inlet 110 to the water outlet 120, the impact force of the water flow gradually decreases. By gradually reducing the size of the blades 232 of each stirring paddle 230, the impact force of the water flow required to drive the stirring paddle 230 to rotate in this direction gradually decreases, thereby facilitating the rotation of each stirring paddle 230 within the screening chamber 101 and ensuring that the rotation of the stirring paddle 230 produces the corresponding stirring effect. At the same time, the multi-segment independently rotating stirring paddles 230 can better achieve rotation under the impact of the water flow without the need for additional power supply, making them particularly suitable for the efficient separation of benthic invertebrates from bottom sediment when it is difficult to find a power network for field sampling.

[0034] In one embodiment, the screening and washing mechanism 200 further includes a plurality of stirring plates, each of which is evenly distributed on the rotating ring 220 near the bottom of the screening and washing chamber 101. Specifically, by providing stirring plates, the bottom of the screening and washing chamber 101 can be further stirred. The rotation of the stirring plates can induce the fluid at the bottom of the screening and washing chamber 101 to form a three-dimensional vortex, which is beneficial for the deposited bottom mud and benthic invertebrates to be discharged from the screening and washing chamber 101 through the drain outlet along with the water flow.

[0035] In one embodiment, such as Figure 2As shown, a plurality of mounting blocks 510 are arranged around the bottom of the screening and washing chamber 101. Each mounting block 510 has a mounting groove 511. A plurality of fitting blocks 520 are arranged around the first end of the mounting column 210. Each fitting block 520 is fitted into a mounting groove 511. Specifically, the mounting blocks 510 are arc-shaped blocks, and the mounting blocks 510 are spaced apart on the bottom of the screening and washing chamber 101 to form a ring structure. Each mounting groove 511 is opened in a clockwise or counterclockwise direction. The number of fitting blocks 520 is equal to the number of mounting blocks 510. By rotating the mounting column 210, the fitting blocks 520 on the mounting column 210 are rotated and embedded into the mounting groove 511, so that the mounting column 210 can be quickly assembled into the screening and washing chamber 101.

[0036] In one embodiment, such as Figure 1 As shown, a handle 400 is rotatably provided on the washing tank 100. Specifically, by providing the handle 400, the mechanical structure can be optimized, making it easier for operators to move the washing tank 100 by holding the handle 400, thus reducing the difficulty of moving it.

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

[0038] This utility model provides a benthic invertebrate screening and washing device. A screening and washing mechanism is set in the screening and washing chamber of the screening and washing tank. The mounting column of the screening and washing mechanism is installed at the bottom of the screening and washing chamber. A rotating ring is rotatably mounted on the mounting column. A stirring paddle is connected to the rotating ring. In conjunction with a sampling pump and a delivery pipe, water containing benthic invertebrates and bottom sediment is transported into the screening and washing chamber. Under the impact of the water flow, the stirring paddle can rotate in the screening and washing chamber. The shear force and eddy current generated by the rotation of the stirring paddle can separate the benthic invertebrates from the bottom sediment, thereby improving 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. An apparatus for screening benthic invertebrates, characterized in that, include: A sieving and washing barrel, wherein a sieving and washing chamber is provided on the sieving and washing barrel, a water inlet is provided on the first end of the sieving and washing barrel, and a drain is provided on the second end of the sieving and washing barrel; A screening and washing mechanism, comprising: a mounting column, a rotating ring, and a stirring paddle; the mounting column is disposed within the screening and washing chamber; the rotating ring is rotatably disposed on the mounting column; and the stirring paddle is connected to the rotating ring. A sampling mechanism, comprising a sampling pump and a delivery pipe, wherein the sampling pump is connected to a first end of the delivery pipe and the second end of the delivery pipe is connected to the water inlet.

2. The benthic invertebrate sorting device of claim 1, wherein, The mounting post has a rotating ring groove, and the rotating ring is rotatably fitted inside the rotating ring groove.

3. The benthic invertebrate sorting device of claim 1, wherein, The stirring paddle includes a fixed ring and multiple blades. The fixed ring is sleeved on the rotating ring, and each blade is evenly distributed on the outer surface of the fixed ring.

4. The benthic invertebrate screening device of claim 3, wherein, The screening and washing mechanism further includes: a locking bolt, a through hole on the fixed ring, a threaded hole on the rotating ring, and the locking bolt passing through the through hole and screwed into the threaded hole.

5. The benthic invertebrate screening device of claim 3, wherein, The first end of the blade is connected to the fixing ring, and the width of the first end of the blade is smaller than the width of the second end of the blade.

6. The benthic invertebrate screening device of claim 5, wherein, The blade is gradually curved from its first end to its second end.

7. The benthic invertebrate screening device of claim 6, wherein, The number of agitators is set to multiple, and the size of the blades of each agitator gradually decreases along the direction from the water inlet to the water outlet.

8. The benthic invertebrate sorting device of claim 7, wherein, The screening and washing mechanism further includes: multiple stirring plates, each of which is evenly distributed on the rotating ring near the bottom of the screening and washing chamber.

9. The benthic invertebrate sorting device of claim 1, wherein, Multiple mounting blocks are arranged around the bottom of the screening and washing chamber, and each mounting block has a mounting groove. Multiple fitting blocks are arranged around the first end of the mounting column, and each fitting block is fitted into a mounting groove.

10. The benthic invertebrate sorting device of claim 1, wherein, The washing drum is equipped with a rotating handle.

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