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CN-224219248-U - Benthic invertebrate animal flotation device

CN224219248UCN 224219248 UCN224219248 UCN 224219248UCN-224219248-U

Abstract

The utility model relates to a benthonic invertebrate flotation device which comprises a flotation frame, a mounting frame and a supporting frame, wherein a first screen plate is arranged in a flotation cavity of the flotation frame and is sleeved on the flotation frame in a matched manner, the interception screen plate on the mounting frame is aligned with the first screen plate, and the aperture of the interception screen is larger than that of the first screen plate, so that when benthonic invertebrates are sorted, gravels and aquatic weed residues with larger volumes can be intercepted by the interception screen plate, and then the benthonic invertebrates are further screened by the first screen plate, so that non-target substances mixed in the benthonic invertebrates can be effectively reduced, the possibility of adhesion and hiding of the benthonic invertebrates is reduced, the sorting difficulty is reduced, the sorting efficiency of the benthonic invertebrates is improved, and the sample collection efficiency of the benthonic invertebrates is improved.

Inventors

  • CHEN CHAO
  • LI SHUHUI
  • PENG YUNHUI

Assignees

  • 广东省惠州生态环境监测站

Dates

Publication Date
20260512
Application Date
20250806

Claims (10)

  1. 1. A benthic invertebrate flotation device, characterized by comprising the following steps: The flotation device comprises a flotation frame, wherein a flotation cavity is formed in the flotation frame, a first screen plate is arranged in the flotation cavity, and a plurality of first screen holes are formed in the first screen plate; The device comprises a flotation frame, a mounting frame, a first sieve plate, a second sieve plate, a first sieve plate and a second sieve plate, wherein the mounting frame is sleeved on the first end of the flotation frame, the mounting frame is provided with an interception net plate, the interception net plate is aligned with the first sieve plate, a plurality of interception net holes are formed in the interception net plate, and the aperture of each interception net hole is larger than that of the first sieve net hole; And the support frame is connected with the second end of the flotation frame.
  2. 2. The benthonic invertebrate flotation device of claim 1, wherein a first end of the mounting bracket is positioned within the flotation chamber and a second end of the mounting bracket is provided with an abutment ring that movably abuts an outer edge of the flotation chamber.
  3. 3. The benthonic invertebrate flotation device of claim 2, wherein the first face of the abutment ring is provided with a stop tab, the first end of the flotation frame is provided with a stop slot, and the stop tab is engaged in the stop slot.
  4. 4. A benthonic invertebrate flotation device according to claim 3, characterized in that a first holding projection is provided on the second face of said abutment ring.
  5. 5. The benthonic invertebrate flotation device of claim 1, wherein a first slot is provided in the flotation frame, the first slot is in communication with the flotation chamber, a first retaining ring plate is disposed in the flotation chamber, the first screen plate is inserted into the flotation chamber through the first slot, and the peripheral edge of the first screen plate is abutted against the first retaining ring plate.
  6. 6. The benthonic invertebrate flotation device of claim 5, wherein the first screen panel has second gripping protrusions disposed thereon.
  7. 7. The benthonic invertebrate flotation device of claim 5, further comprising a second screen plate, wherein a plurality of second screen holes are formed in the second screen plate, the aperture of the second screen holes is smaller than that of the first screen holes, a second slot is formed in the flotation frame and is communicated with the flotation cavity, a second limiting ring plate is arranged in the flotation cavity, the second screen plate is inserted into the flotation cavity through the second slot, and the peripheral edge of the second screen plate is abutted against the second limiting ring plate.
  8. 8. The benthonic invertebrate flotation device of claim 7, wherein a third holding tab is provided on the second screen panel.
  9. 9. The benthonic invertebrate flotation device of claim 8, wherein a plurality of reinforcing strips are provided on the flotation frame.
  10. 10. The benthonic invertebrate flotation device of claim 1, wherein the support frame comprises a first support ring, a second support ring and a plurality of support rods, the first support ring and the second support ring being spaced apart, a first end of each support rod being connected to the first support ring, a second end of each support rod being connected to the second support ring, the first support ring being connected to the second end of the flotation frame.

Description

Benthic invertebrate animal flotation device Technical Field The utility model relates to the technical field of aquatic organism separation equipment, in particular to a benthonic invertebrate flotation device. Background The large benthonic invertebrate is an aquatic invertebrate which inhabits the bottom of a water body or is attached to plants and stones in the water, comprises annex animals, mollusks, arthropods and the like, can promote substance circulation and energy flow as an intermediate link of an aquatic food chain, is sensitive to water quality change, is called an underwater whistle, has a species composition and a community structure closely related to the quality of the water environment, and is an important index for evaluating the health of an aquatic ecosystem. The sampling of large benthonic invertebrates is an important basic work in the ecological investigation and monitoring of water areas such as rivers, lakes, reservoirs, ponds and the like, benthonic animals in water areas are generally collected together with bottom mud in the sampling process, then the bottom mud is placed in a screening barrel to be separated from benthonic animals, a screen mesh of a flotation device is matched for washing out large benthonic invertebrate samples, but the existing flotation device is simple in structure, more stone gravel and water grass residues are mixed when the collected samples are washed on the screen mesh of the flotation device, the biological and non-biological size difference is large, the benthonic invertebrates are easy to attach and hide in the water areas, the sorting difficulty is large, the benthonic animals are difficult to sort effectively, and the collection efficiency of the benthonic invertebrate samples is greatly influenced. Disclosure of utility model Based on this, it is necessary to provide a benthonic invertebrate flotation device. The utility model solves the technical problems as follows, a benthonic invertebrate flotation device comprises: The flotation device comprises a flotation frame, wherein a flotation cavity is formed in the flotation frame, a first screen plate is arranged in the flotation cavity, and a plurality of first screen holes are formed in the first screen plate; The device comprises a flotation frame, a mounting frame, a first sieve plate, a second sieve plate, a first sieve plate and a second sieve plate, wherein the mounting frame is sleeved on the first end of the flotation frame, the mounting frame is provided with an interception net plate, the interception net plate is aligned with the first sieve plate, a plurality of interception net holes are formed in the interception net plate, and the aperture of each interception net hole is larger than that of the first sieve net hole; And the support frame is connected with the second end of the flotation frame. In one embodiment, the first end of the mounting frame is located in the flotation cavity, and the second end of the mounting frame is provided with an abutting ring, and the abutting ring is movably abutted to the outer side edge of the flotation cavity. In one embodiment, a limiting protrusion is arranged on the first surface of the abutting ring, a limiting groove is formed in the first end of the flotation frame, and the limiting protrusion is embedded in the limiting groove. In one embodiment, the second face of the abutment ring is provided with a first holding projection. In one embodiment, a first slot is formed in the flotation frame and is communicated with the flotation cavity, a first limiting ring plate is arranged in the flotation cavity, a first screen plate is inserted into the flotation cavity through the first slot, and the peripheral edges of the first screen plate are abutted to the first limiting ring plate. In one embodiment, the first screen plate is provided with a second holding bump thereon. In one embodiment, the benthonic invertebrate flotation device further comprises a second screen plate, a plurality of second screen holes are formed in the second screen plate, the aperture of the second screen holes is smaller than that of the first screen holes, a second slot is formed in the flotation frame and communicated with the flotation cavity, a second limiting ring plate is arranged in the flotation cavity, the second screen plate is inserted into the flotation cavity through the second slot, and the peripheral edges of the second screen plate are abutted to the second limiting ring plate. In one embodiment, a third holding bump is provided on the second screen plate. In one embodiment, the flotation frame is provided with a plurality of reinforcing bars. In one embodiment, the support frame comprises 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 arranged at intervals, the first end of each support rod is connected with the first support ring, the second end of each support