A multi-depth benthic organism collection device

Abstract

The application discloses a kind of multi-depth benthos collection devices, belong to benthos collection technical field, including collection frame, the bottom side of collection frame is provided with sliding groove, sliding groove is provided with vibration assembly.In the application, by setting adjustment installation component, sewage soil in collection frame is washed by water flow, and will flow out from the gap, and make sample organism remain in collection frame, so as to realize the cleaning and separation of benthos sample, avoid unnecessary impurities sewage influence collection quality, complete washing, staff pull limit rod, so that limit rod and limit hole are separated, so as to release the installation frame limit, then, staff pull installation frame from installation groove seat by handle, so that one side of collection frame is completely opened, benthos sample is taken out from collection frame by staff, avoid benthos residue in the interior, improve sampling efficiency.

Description

Technical Field

[0001] This invention belongs to the field of benthic organism collection technology, and in particular relates to a multi-depth benthic organism collection device. Background Technology

[0002] Benthic organisms are biological communities that live at the bottom of water bodies (such as the seabed, lake bottom, river bottom, etc.) and in their sediments. They usually inhabit the surface or interior of the substrate and rely on the benthic environment to complete all or part of their life activities. These organisms are an important part of the aquatic ecosystem. In order to study benthic organisms, it is necessary to collect certain samples for experiments.

[0003] Document CN112535158B discloses a marine benthic organism collection device, including a rectangular bottom trawl net, a gate, and a bottom sealing plate. The rectangular bottom trawl net is open from front to back, and balancing side panels are provided on both sides of the inlet end of the rectangular bottom trawl net. The gap between the balancing side panels and the rectangular bottom trawl net forms a water inlet channel. The bottom sealing plate is detachably connected to the outlet end of the rectangular bottom trawl net. The gate is located inside the rectangular bottom trawl net near the opening end, and the gate is connected to an elastic triggering mechanism that can raise or lower the gate, thereby opening or closing the inlet of the rectangular bottom trawl net. This invention has a clever structure, is convenient and labor-saving to use, does not easily shake during use, has good stability, and can prevent benthic organisms from escaping. However, in actual use, after the collection device completes the collection, the benthic organisms, sludge, and sewage in the collection device are mixed, making it inconvenient for staff to take samples. Therefore, improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-depth benthic organism collection device to solve the problem that benthic organisms, sludge and sewage are mixed in the collection device, making it inconvenient for staff to take samples.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A multi-depth benthic organism collection device includes a collection frame, a sliding groove is provided on one side of the bottom of the collection frame, a vibration component is provided in the sliding groove, a collection shovel is provided on one side of the vibration component, and an adjustment and installation component and a one-way component are respectively provided on both sides of the collection frame. The adjustment and installation assembly includes a mounting frame that can be detachably installed on one side of the collection frame. Multiple linearly arrayed adjustment fan blades are rotatably connected inside the mounting frame. Cavities are opened on both sides of the mounting frame. Connecting shafts are connected to both sides of the adjustment fan blades. One end of the connecting shaft extends into the cavity and is rotatably connected to the cavity. A transmission gear is connected to the end of the connecting shaft away from the adjustment fan blade. The bottom of the multiple transmission gears is meshed with the same movable rack. One side of the movable rack is in contact with one side of the inner wall of the cavity.

[0006] As a further description of the above technical solution: An electric push rod is connected to the bottom of the movable rack, and the end of the electric push rod away from the movable rack is connected to one side of the inner wall of the cavity.

[0007] As a further description of the above technical solution: The collection frame is connected to two symmetrically arranged mounting slots on one side, and the mounting frame is slidably connected between the two mounting slots. A horizontal plate is connected to the bottom of one side of the collection frame, and the bottom of the mounting frame fits against the top of the horizontal plate. A handle is connected to the top of the mounting frame.

[0008] As a further description of the above technical solution: Two symmetrically arranged limiting holes are opened on one side of the mounting frame. Two symmetrically arranged connecting plates are connected to the top of the horizontal plate. A mounting bracket is connected to one side of the connecting plate. A sliding hole is opened on one side of the mounting bracket. A limiting rod is slidably connected in the sliding hole. One end of the limiting rod extends to the other side of the connecting plate and engages with the limiting hole. A limiting plate is connected to the outer surface of the limiting rod. The limiting plate has a circular cross-sectional shape. A return spring is sleeved on the outer surface of the limiting rod. The two ends of the return spring are connected to one side of the limiting plate and one side of the mounting bracket, respectively.

[0009] As a further description of the above technical solution: The vibration assembly includes a fixed rod, which is fixedly connected to a sliding groove. The fixed rod has multiple sliding circular holes arranged in a linear array. Sliding rods that can automatically reset are slidably connected in the sliding circular holes. One end of the multiple sliding rods is connected to one side of the collecting shovel, and the end of the multiple sliding rods away from the collecting shovel is connected to the same sliding plate. The sliding plate is slidably connected in the sliding groove.

[0010] As a further description of the above technical solution: A second spring is fitted on the outer surface of the sliding rod, and the two ends of the second spring are respectively connected to one side of the sliding plate and one side of the fixed rod.

[0011] As a further description of the above technical solution: A rotating cam is attached to the side of the sliding plate away from the sliding rod. A drive motor is fixedly installed in the sliding groove by a mounting seat. One end of the output shaft of the drive motor is connected to the bottom of the rotating cam.

[0012] As a further description of the above technical solution: The unidirectional component includes two symmetrically arranged vertical rods. One side of each vertical rod is connected to one side of the inner wall of the collection frame. A plurality of fixed boxes arranged in a linear array are connected to one side of each vertical rod. An incomplete gear is rotatably connected to the fixed box via a rotating shaft. A blocking rod is connected to one side of the incomplete gear. A through groove is opened on one side of the fixed box. The blocking rod is slidably connected to the through groove. A reset rack that can drive the incomplete gear to reset is meshed on one side of the incomplete gear. One side of the reset rack is in contact with one side of the inner wall of the fixed box.

[0013] As a further description of the above technical solution: Both sides of the reset rack are connected to fixed sliding sleeves, and a fixed sliding rod is slidably connected inside the fixed sliding sleeve. The fixed sliding rod is fixedly connected inside the fixed box. A first spring is sleeved on the outer surface of the fixed sliding rod. The two ends of the first spring are respectively connected to one side of the fixed sliding sleeve and one side of the inner wall of the fixed box. A flexible sealing gasket for sealing the fixed box is provided in the through groove. The cross-sectional shape of the flexible sealing gasket is rectangular.

[0014] As a further description of the above technical solution: Multiple filter holes are provided on both sides of the collection frame, and a connector is connected to the top of the collection frame for connecting to external devices.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting and adjusting the installation components, the operator starts the electric push rod. The electric push rod drives the adjusting fan blades to deflect through the moving rack and transmission gear, creating gaps in the inner wall of the installation frame. The operator then places the collection frame into the water and washes it repeatedly. After the water flow washes the wastewater and soil in the collection frame, it flows out through the gaps, leaving the sample organisms inside the collection frame. This achieves the cleaning and separation of benthic organism samples, avoiding unnecessary impurities and wastewater from affecting the collection quality. After washing, the operator pulls the limiting rod to separate it from the limiting hole, thereby releasing the limitation on the installation frame. Then, the operator pulls the installation frame out of the installation slot using the handle, fully opening one side of the collection frame. This facilitates the removal of the benthic organism samples from the collection frame, preventing benthic organisms from remaining inside and improving sampling efficiency.

[0016] 2. In this invention, by setting up a vibration component, the drive motor drives the collection shovel to reciprocate through rotating the cam, sliding plate, second spring, sliding plate and sliding rod. The reciprocating vibration of the collection shovel, in conjunction with external equipment, sweeps and collects the terrestrial organisms on the riverbed. The reciprocating vibration of the collection shovel can increase the shearing force on the riverbed soil, thereby improving the collection efficiency of benthic organisms.

[0017] 3. In this invention, by setting a one-way component, when soil and environmental organisms enter the collection frame, the blocking rod, under the action of external force, drives the incomplete gear and the reset rack. After collection is completed, the blocking rod is no longer under the action of external force, and the first spring drives the reset rack to perform a reset movement through the fixed sliding sleeve. The reset rack drives the blocking rod to reset again through the incomplete gear, thereby realizing the one-way limit of the blocking rod and preventing benthic organisms from leaving the collection frame. The one-way barrier channel formed by the cooperation of the reset rack, the incomplete gear, the blocking rod and the first spring can prevent the soil and environmental organisms from leaving the riverbed without blocking the entry of the soil and environmental organisms, thus ensuring the integrity of the benthic organisms during collection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a multi-depth benthic organism collection device proposed in this invention; Figure 2 This is a three-dimensional structural diagram of a multi-depth benthic organism collection device proposed in this invention from another perspective. Figure 3 This is a three-dimensional disassembled structural diagram of a multi-depth benthic organism collection device proposed in this invention; Figure 4 This invention proposes a multi-depth benthic organism collection device. Figure 3 Enlarged structural diagram of section A; Figure 5 This is a schematic diagram of the internal three-dimensional structure of a unidirectional component of a multi-depth benthic organism collection device proposed in this invention; Figure 6 This is a three-dimensional cross-sectional view of the adjustment and installation components of a multi-depth benthic organism collection device proposed in this invention; Figure 7 This invention proposes a multi-depth benthic organism collection device. Figure 6 Enlarged structural diagram of section B; Figure 8 This is a partial three-dimensional structural diagram of the adjustment and installation components of a multi-depth benthic organism collection device proposed in this invention.

[0019] Legend: 1. Collection frame; 2. Connector; 3. Adjustment and installation assembly; 301. Handle; 302. Mounting frame; 303. Mounting slot; 304. Connecting plate; 305. Mounting bracket; 306. Adjusting fan blade; 307. Limiting hole; 308. Moving rack; 309. Transmission gear; 310. Electric push rod; 311. Return spring; 312. Limiting rod; 4. One-way assembly; 401. Vertical rod; 402. Fixing box; 403. Flexible sealing pad; 404. Blocking rod; 405. Incomplete gear; 406. Return rack; 407. Fixed slide rod; 408. Fixed sliding sleeve; 409. First spring; 5. Collection shovel; 6. Filter hole; 7. Vibration assembly; 701. Fixed rod; 702. Sliding rod; 703. Second spring; 704. Sliding plate; 705. Drive motor; 706. Rotating cam. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1-8 The present invention provides a technical solution: A multi-depth benthic organism collection device includes a collection frame 1. A sliding groove is provided on one side of the bottom of the collection frame 1, and a vibration component 7 is provided in the sliding groove. A collection shovel 5 is provided on one side of the vibration component 7. An adjustment and installation component 3 and a one-way component 4 are respectively provided on both sides of the collection frame 1. Multiple filter holes 6 are provided on both sides of the collection frame 1. A connector 2 is connected to the top of the collection frame 1 for connecting to external equipment.

[0022] The adjustment and installation assembly 3 includes an installation frame 302 that can be detachably installed on one side of the collection frame 1. Multiple linearly arrayed adjustment fan blades 306 are rotatably connected inside the installation frame 302. Cavities are formed on both sides of the installation frame 302. Connecting shafts are connected to both sides of each adjustment fan blade 306. One end of the connecting shaft extends into the cavity and is rotatably connected to the cavity. A transmission gear 309 is connected to the end of the connecting shaft away from the adjustment fan blades 306. The bottoms of multiple transmission gears 309 are meshed with the same movable rack 308. One side of the movable rack 308 is in contact with one side of the inner wall of the cavity. An electric push rod 310 is connected to the bottom of the movable rack 308. The end of the electric push rod 310 away from the movable rack 308 is connected to one side of the inner wall of the cavity. Two symmetrically arranged installation slots 303 are connected to one side of the collection frame 1. 2. Sliding connection between two mounting slots 303. A horizontal plate is connected to the bottom of one side of the collection frame 1. The bottom of the mounting frame 302 fits against the top of the horizontal plate. A handle 301 is connected to the top of the mounting frame 302. Two symmetrically arranged limiting holes 307 are opened on one side of the mounting frame 302. Two symmetrically arranged connecting plates 304 are connected to the top of the horizontal plate. A mounting bracket 305 is connected to one side of the connecting plate 304. A sliding hole is opened on one side of the mounting bracket 305. A limiting rod 312 is slidably connected in the sliding hole. One end of the limiting rod 312 extends to the other side of the connecting plate 304 and engages with the limiting hole 307. A limiting plate with a circular cross-section is connected to the outer surface of the limiting rod 312. A return spring 311 is sleeved on the outer surface of the limiting rod 312. The two ends of the return spring 311 are respectively connected to one side of the limiting plate and one side of the mounting bracket 305. The specific implementation method is as follows: By setting and adjusting the installation component 3, the staff starts the electric push rod 310. The electric push rod 310 drives the adjusting fan blade 306 to deflect through the moving rack 308 and the transmission gear 309, so that a gap appears in the inner wall of the installation frame 302. The staff places the collection frame 1 into the water and washes it back and forth. After the sewage and soil in the collection frame 1 are washed by the water flow, they will flow out from the gap, and the sample organisms will remain in the collection frame 1, thereby achieving the cleaning and separation of benthic organism samples and avoiding unnecessary impurities and sewage from affecting the collection quality. After washing, the staff pulls the limiting rod 312, so that the limiting rod 312 separates from the limiting hole 307, thereby releasing the limitation on the installation frame 302. Then, the staff pulls the installation frame 302 out of the installation slot 303 through the handle 301, so that one side of the collection frame 1 is fully opened, making it convenient for the staff to take out the benthic organism samples from the collection frame 1, avoiding the benthic organisms remaining inside and improving the sampling efficiency.

[0023] The vibration assembly 7 includes a fixed rod 701, which is fixedly connected to a sliding groove. The fixed rod 701 has multiple sliding circular holes arranged in a linear array. Sliding rods 702 that can automatically reset are slidably connected in the sliding circular holes. One end of the multiple sliding rods 702 is connected to one side of the collecting shovel 5. The ends of the multiple sliding rods 702 away from the collecting shovel 5 are connected to the same sliding plate 704. The sliding plate 704 is slidably connected in the sliding groove. A second spring 703 is sleeved on the outer surface of the sliding rod 702. The two ends of the second spring 703 are respectively connected to one side of the sliding plate 704 and one side of the fixed rod 701. A rotating cam 706 is attached to the side of the sliding plate 704 away from the sliding rod 702. A drive motor 705 is fixedly installed in the sliding groove through a mounting seat. One end of the output shaft of the drive motor 705 is connected to the bottom of the rotating cam 706.

[0024] The specific implementation method is as follows: by setting up the vibration component 7, the drive motor 705 drives the collection shovel 5 to reciprocate by rotating the cam 706, the sliding plate 704, the second spring 703, the sliding plate 704 and the sliding rod 702. The reciprocating vibration of the collection shovel 5, in conjunction with the external equipment, sweeps and collects the terrestrial organisms on the riverbed. The reciprocating vibration of the collection shovel 5 can increase the shearing force on the riverbed soil, thereby improving the collection efficiency of benthic organisms.

[0025] The unidirectional component 4 includes two symmetrically arranged vertical rods 401. One side of each vertical rod 401 is connected to one side of the inner wall of the collection frame 1. Multiple fixed boxes 402 arranged in a linear array are connected to one side of each vertical rod 401. An incomplete gear 405 is rotatably connected to each fixed box 402 via a rotating shaft. A blocking rod 404 is connected to one side of each incomplete gear 405. A through groove is formed on one side of each fixed box 402, and the blocking rod 404 is slidably connected within the through groove. A reset rack 406, capable of resetting the incomplete gear 405, is meshed with one side of the incomplete gear 405. One side of the reset rack 406 is attached to one side of the inner wall of the fixed box 402. Both sides of the reset rack 406 are connected to fixed sliding sleeves 408. A fixed sliding rod 407 is slidably connected inside the fixed sliding sleeves 408. The fixed sliding rod 407 is fixedly connected inside the fixed box 402. A first spring 409 is sleeved on the outer surface of the fixed sliding rod 407. The two ends of the first spring 409 are respectively connected to one side of the fixed sliding sleeve 408 and one side of the inner wall of the fixed box 402. A flexible sealing gasket 403 for sealing the fixed box 402 is provided in the through groove. The flexible sealing gasket 403 has a rectangular cross-sectional shape.

[0026] The specific implementation method is as follows: By setting a one-way component 4, when soil and environmental organisms enter the collection frame 1, the blocking rod 404 drives the incomplete gear 405 and the reset rack 406 under the action of external force. After the collection is completed, the blocking rod 404 is no longer subject to external force. The first spring 409 drives the reset rack 406 to perform a reset movement through the fixed sliding sleeve 408. The reset rack 406 drives the blocking rod 404 to reset again through the incomplete gear 405, thereby realizing the one-way limit of the blocking rod 404 and preventing benthic organisms from leaving the collection frame 1. The one-way blocking channel formed by the cooperation of the reset rack 406, the incomplete gear 405, the blocking rod 404 and the first spring 409 can prevent the soil and environmental organisms on the riverbed from leaving without blocking the entry of the soil and environmental organisms, thus ensuring the integrity of the benthic organisms during collection.

[0027] Working principle: When in use, the staff connects to the external equipment through connector 2. By adjusting the position of the external equipment, the position of the collection frame 1 in the river is adjusted. After the bottom of the collection frame 1 contacts the riverbed, the external equipment moves the collection frame 1 on the riverbed to collect benthic organisms.

[0028] During this process, the drive motor 705 drives the rotating cam 706 to rotate, the rotating cam 706 drives the sliding plate 704 to move to one side, and at the same time, the second spring 703 drives the sliding plate 704 to perform a reset movement, so that the sliding plate 704 performs reciprocating motion, the sliding plate 704 drives the sliding rod 702 to reciprocate motion, and the sliding rod 702 drives the collecting shovel 5 to vibrate back and forth. Through the reciprocating vibration of the collecting shovel 5, in conjunction with the external equipment, the terrestrial organisms on the riverbed are shoveled and collected.

[0029] External equipment, in conjunction with a collection shovel 5 and a vibration assembly 7, shovels and collects soil and environmental organisms from the riverbed. During this process, when soil and environmental organisms enter the collection frame 1, the blocking rod 404 moves backward under the action of external force. At this time, the blocking rod 404 drives the incomplete gear 405 to rotate, and the incomplete gear 405 drives the reset rack 406 to move. After the soil and environmental organisms enter the collection frame 1, the blocking rod 404 is no longer subject to external force. At this time, the first spring 409 drives the fixed sliding sleeve 408 to perform a reset movement, and the fixed sliding sleeve 408 drives the reset rack 406 to perform a reset movement. The reset rack 406 drives the incomplete gear 405 to reset and rotate, so that the blocking rod 404 resets again. In addition, the through groove limits one side of the blocking rod 404, thereby achieving one-way limiting of the blocking rod 404 and preventing benthic organisms from leaving the collection frame 1.

[0030] After collecting the benthic organisms, the collection frame 1 is removed from the water surface using external equipment. Then, the staff activates the electric push rod 310, which moves the moving rack 308. The moving rack 308 drives the transmission gear 309 to rotate, which in turn drives the adjusting fan blade 306 to deflect, creating a gap in the inner wall of the mounting frame 302. The staff then places the collection frame 1 into the water and washes it repeatedly. The sludge and soil in the collection frame 1 will flow out through the gaps after being washed by the water flow, leaving the sample organisms inside the collection frame 1. After washing, the staff pulls the limiting rod 312, which separates from the limiting hole 307, thereby releasing the restriction on the mounting frame 302. Then, the staff pulls the mounting frame 302 out of the mounting slot 303 using the handle 301, so that one side of the collection frame 1 is fully opened, making it easy for the staff to remove the benthic organism samples from the collection frame 1.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-depth benthic organism collection device, comprising a collection frame (1), characterized in that, The bottom side of the collection frame (1) is provided with a sliding groove, and a vibration component (7) is provided in the sliding groove. A collection shovel (5) is provided on one side of the vibration component (7). An adjustment and installation component (3) and a one-way component (4) are respectively provided on both sides of the collection frame (1). The adjustment mounting assembly (3) includes a mounting frame (302) that can be detachably mounted to one side of the collection frame (1). Multiple linearly arrayed adjustment fan blades (306) are rotatably connected inside the mounting frame (302). Cavities are provided on both sides of the mounting frame (302). Connecting shafts are connected to both sides of the adjustment fan blades (306). One end of the connecting shaft extends into the cavity and is rotatably connected to the cavity. A transmission gear (309) is connected to the end of the connecting shaft away from the adjustment fan blades (306). The bottom of the multiple transmission gears (309) is meshed with the same movable rack (308). One side of the movable rack (308) is in contact with one side of the inner wall of the cavity. The bottom of the movable rack (308) is connected to an electric push rod (310), and the end of the electric push rod (310) away from the movable rack (308) is connected to one side of the inner wall of the cavity. The collection frame (1) has two symmetrically arranged mounting slots (303) connected to one side. The mounting frame (302) is slidably connected between the two mounting slots (303). A horizontal plate is connected to the bottom of one side of the collection frame (1). The bottom of the mounting frame (302) is in contact with the top of the horizontal plate. A handle (301) is connected to the top of the mounting frame (302). The mounting frame (302) has two symmetrically arranged limiting holes (307) on one side, and two symmetrically arranged connecting plates (304) are connected to the top of the horizontal plate. A mounting bracket (305) is connected to one side of the connecting plate (304), and a sliding hole is provided on one side of the mounting bracket (305). A limiting rod (312) is slidably connected in the sliding hole. One end of the limiting rod (312) extends to the other side of the connecting plate (304) and is engaged with the limiting hole (307). A limiting plate is connected to the outer surface of the limiting rod (312). The limiting plate has a circular cross-sectional shape. A return spring (311) is sleeved on the outer surface of the limiting rod (312). The two ends of the return spring (311) are respectively connected to one side of the limiting plate and one side of the mounting bracket (305). The vibration component (7) includes a fixed rod (701), which is fixedly connected to the sliding groove. The fixed rod (701) has multiple sliding circular holes arranged in a linear array. A sliding rod (702) that can automatically reset is slidably connected in the sliding circular holes. One end of the multiple sliding rods (702) is connected to one side of the collecting shovel (5), and the end of the multiple sliding rods (702) away from the collecting shovel (5) is connected to the same sliding plate (704). The sliding plate (704) is slidably connected in the sliding groove.

2. The multi-depth benthic organism collection device according to claim 1, characterized in that, The outer surface of the sliding rod (702) is fitted with a second spring (703), and the two ends of the second spring (703) are respectively connected to one side of the sliding plate (704) and one side of the fixed rod (701).

3. The multi-depth benthic organism collection device according to claim 2, characterized in that, A rotating cam (706) is attached to the side of the sliding plate (704) away from the sliding rod (702). A drive motor (705) is fixedly installed in the sliding groove by a mounting seat. One end of the output shaft of the drive motor (705) is connected to the bottom of the rotating cam (706).

4. The multi-depth benthic organism collection device according to claim 3, characterized in that, The unidirectional component (4) includes two symmetrically arranged vertical rods (401). One side of the vertical rod (401) is connected to one side of the inner wall of the collection frame (1). One side of the vertical rod (401) is connected to a plurality of fixed boxes (402) arranged in a linear array. An incomplete gear (405) is rotatably connected to the fixed box (402) through a rotating shaft. One side of the incomplete gear (405) is connected to a blocking rod (404). A through groove is opened on one side of the fixed box (402). The blocking rod (404) is slidably connected in the through groove. One side of the incomplete gear (405) is meshed with a reset rack (406) that can drive the incomplete gear (405) to reset. One side of the reset rack (406) is in contact with one side of the inner wall of the fixed box (402).

5. A multi-depth benthic organism collection device according to claim 4, characterized in that, The reset rack (406) is connected to fixed sliding sleeves (408) on both sides. A fixed sliding rod (407) is slidably connected inside the fixed sliding sleeve (408). The fixed sliding rod (407) is fixedly connected inside the fixed box (402). A first spring (409) is sleeved on the outer surface of the fixed sliding rod (407). The two ends of the first spring (409) are respectively connected to one side of the fixed sliding sleeve (408) and one side of the inner wall of the fixed box (402). A flexible sealing gasket (403) for sealing the fixed box (402) is provided in the through groove. The cross-sectional shape of the flexible sealing gasket (403) is rectangular.

6. A multi-depth benthic organism collection device according to claim 5, characterized in that, The collection frame (1) has multiple filter holes (6) on both sides, and the top of the collection frame (1) is connected to a connector (2) for connecting to external equipment.

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