阅读说明：本技术 诱导型水生生物采集及水体净化装置 (Induced aquatic organism collecting and water body purifying device ) 是由 秦孝辉 王建国 陈文龙 杨芳 李�杰 唐红亮 李丽 马金龙 穆贵玲 谢宇宁 黄文 于 2020-06-03 设计创作，主要内容包括：本发明公开了诱导型水生生物采集及水体净化装置,包括通过锚固绳连接为整体结构的诱导型人工鱼巢和底层生物采集装置；所述诱导型人工鱼巢包括：上层模块,其包括浮岛模块、水生植物和上部框架；下层模块,其包括下部框架、粘性卵附着模块和粘性卵附着基质；着生硅藻附着板；所述底层生物采集装置包括：上壳体,其为呈贝壳状的曲面壳体,所述上壳体上均匀设置有多个圆孔；下壳体,其内部从下至上依次填充砂砾层和固定卵石、活动卵石,所述上壳体和下壳体的后端均设置有导流叶片。本发明的装置实现对粘附性鱼卵、粘沉性鱼卵、着生硅藻、底栖动物的诱导式采集,同时具有净化水体的功能。(The invention discloses an induced aquatic organism collecting and water body purifying device, which comprises an induced artificial fish nest and a bottom layer organism collecting device which are connected into an integral structure through an anchoring rope; the induced artificial fish nest comprises: an upper module including a floating island module, aquatic plants, and an upper frame; a lower layer module comprising a lower frame, a viscous egg attachment module, and a viscous egg attachment matrix; a neonatal diatom attachment plate; the bottom layer biological collection device comprises: the shell-shaped curved surface shell comprises an upper shell body and a plurality of circular holes, wherein the upper shell body is a shell-shaped curved surface shell body, and the plurality of circular holes are uniformly formed in the upper shell body; the lower casing, its inside from supreme packing sand gravel layer in proper order down and fixed cobble, activity cobble, the rear end of going up casing and lower casing all is provided with guide vane. The device provided by the invention realizes the induced collection of adhesive fish eggs, adhesive and sinking fish eggs, the benthic diatoms and the benthic animals, and has the function of purifying water body.)

1. The induction type aquatic organism collecting and water body purifying device is characterized by comprising an induction type artificial fish nest and a bottom layer organism collecting device, wherein the induction type artificial fish nest and the bottom layer organism collecting device are connected into an integral structure through an anchoring rope;

the induced artificial fish nest comprises:

the upper-layer module comprises a floating island module, aquatic plants and an upper frame, the upper frame is of a cubic structure, the floating island module is made of floating body materials and is just bound inside the upper frame, the aquatic plants are transplanted in the floating island module, and the buoyancy of the floating island module is set to always ensure that the induced artificial fish nest floats on the water surface;

the lower layer module comprises a lower frame, a viscous egg attachment module and a viscous egg attachment matrix, the lower frame is of a square structure, the upper layer and the lower layer are provided with reinforcing steel bar grids in a horizontal grid shape, the viscous egg attachment module is arranged in the lower frame, one reinforcing steel bar grid is vertically arranged at each node of each reinforcing steel bar grid, the viscous egg attachment module comprises a fixed rod in the center and a plurality of auxiliary rods which are sequentially arranged at intervals along the longitudinal direction and the circumferential direction of the fixed rod, the auxiliary rods are obliquely arranged downwards and outwards, the viscous egg attachment matrix is textile fabric and is sequentially arranged at intervals on the auxiliary rods, and the lower frame and the upper frame are connected up and down to form a square structure;

the pair of the attached diatom plates are horizontally and symmetrically arranged on two sides of the lower frame;

the bottom layer biological collection device comprises:

the shell-shaped curved surface shell comprises an upper shell body, a plurality of round holes are uniformly formed in the upper shell body, the front end of the upper shell body is a round head shape with the rear end gradually reduced forwards, and two sides of the upper shell body are similar to square;

lower casing, it is square body structure, the upper shed of casing down with the seamless closure in connection back can be dismantled to the lower shed of last casing, the front end of going up the casing is articulated through the connecting hinge with lower casing, the internal balancing weight that is provided with of inferior valve, casing upper shed border is provided with a plurality of steel sheets down and forms latticedly, supreme gravel layer and fixed cobble, the activity cobble are filled in proper order down to casing inside down, the rear end of going up casing and lower casing all is provided with guide vane.

2. The induction type aquatic organism collecting and water body purifying apparatus of claim 1, wherein the upper frame and the lower frame are connected into a whole by binding the center positions of four sides.

3. The induction type aquatic organism collecting and water purifying device of claim 1, wherein the anchoring ropes comprise 4 connecting ropes and 5 bearing ropes, the upper ends of the 4 connecting ropes are respectively fixed at four corners of the bottom of the lower frame, one end of the 5 bearing ropes is integrally connected, the lower ends of the 4 connecting ropes are respectively connected with the other end of 1 bearing rope through a locking ring, and the other ends of the 4 bearing ropes are respectively connected to four lifting rings arranged on the upper shell.

4. The apparatus of claim 1, wherein the fixed rods are suspended from nodes of the steel grid by near-closed hooks.

5. The induction type aquatic organism collecting and water purifying apparatus as claimed in claim 3, wherein a bionic aquatic weed is fixed on the 4 bearing ropes connected to the lifting ring.

6. The induction type aquatic organism collecting and water body purifying apparatus as claimed in claim 1, wherein anchoring teeth are provided at a bottom of a front end of the lower housing.

7. The induction type aquatic organism collecting and water purifying apparatus as claimed in claim 1, wherein the upper opening of the lower casing and the lower opening of the upper casing are connected by bolts and then seamlessly closed, and corresponding plates having screw holes are provided on both sides of the lower casing and the upper casing, and the lower casing and the upper casing are connected by bolts fitted in the screw holes.

8. The apparatus for aquatic life collection and water purification of claim 1, wherein said upper opening of said lower housing and said lower opening of said upper housing are seamlessly closed after being connected by a pair of connecting means on a pair of sides, said connecting means comprising:

the fixed block is fixed on the side surface of the upper shell, the lower bottom surface of the fixed block is tightly attached to the lower opening surface of the upper shell, and a pair of slide rails is further arranged on the upper surface of the fixed block along the length direction;

the first hinge plate is positioned on the upper surface of the fixed block and is provided with a vertical through hole;

the connecting plate is hinged with the first hinge plate in the length direction, a pair of pulleys matched with a pair of slide rails are arranged on the lower bottom surface of the connecting plate, the pulleys are matched with the slide rails in a non-disengaging mode, a free end of the connecting plate in the length direction is provided with an inwards concave groove, and the groove is inwards concave along one side wall of the connecting plate in the width direction to form a pair of sliding grooves;

the second hinge plate is also positioned on the upper surface of the fixed block and is also provided with a vertical through hole;

the free end of the second sliding plate in the length direction is provided with a pair of sliding blocks extending outwards, the sliding plates are matched in the grooves of the connecting plate, and the pair of sliding blocks are matched in the pair of sliding grooves and can freely move along the pair of sliding grooves;

the sliding plate and the connecting plate are matched for the longest length, the first hinged plate and the second hinged plate just rotate to be vertically and closely attached to the side surfaces of the fixing block and the connecting block, and the first hinged plate and the second hinged plate are just correspondingly communicated with the through hole in the connecting block;

the auxiliary blocks are symmetrically positioned at two sides of the connecting block and fixed on the side surface of the lower shell, each auxiliary block is provided with a horizontal through hole corresponding to the through hole of the connecting block, a horizontal connecting rod is inserted into each through hole, the lower bottom surface of each auxiliary block is upwards sunken to form a vertical through hole penetrating through the horizontal through hole, and the side wall of each through hole is provided with a pair of limiting grooves which are horizontally sunken outwards;

the buoyancy column is made of a buoyancy material, the side wall of the buoyancy column is provided with a pair of limiting rods, the buoyancy column is matched in the through hole, the limiting rods are limited in the limiting grooves, and when the limiting rods are tightly attached to the top surface of the limiting grooves, the upper end of the buoyancy column is located in the through hole.

Technical Field

The invention relates to the technical field of hydraulic engineering. More particularly, the invention relates to an induced aquatic organism collecting and water body purifying device.

Background

The construction of the cascade hydroelectric dam can obstruct river basins, lead rivers to be fragmented and reservoir, bring a series of water ecological environment problems, and particularly have great influence on aquatic organisms. Meanwhile, there are also influencing factors such as over-fishing, water environment pollution, river channel sand sampling, etc., which result in the loss or destruction of the aquatic habitat environment represented by fish, and further lead to the trend that the amount of aquatic organism resources is sharply declined in the past decades. Therefore, investigation and monitoring of aquatic organisms including fish, construction of habitat of aquatic organisms, and restoration of aquatic ecological environment have been the major research directions for environmental impact of wading engineering and restoration of aquatic ecological system.

Different fishes have different reproduction habits, most fishes produce drifting eggs, sticky and sinking eggs and the like, and when the early-stage resource investigation of the fishes producing the drifting eggs is carried out, the existing investigation net such as the jiang net and the shallow I-shaped conical plankton net has better acquisition effects, and the investigation requirements can be met. Aiming at the collection and investigation of sinking roe resources, the currently adopted methods include a trawl method, an excavation method and the like, however, the topography of the river channel in most river sections such as the middle and upper reaches of the river is large, the particle size of the bottom is large, the operability is not strong by adopting the trawl method, and the collected roe is easy to damage during collection; when the excavation method is adopted, due to the water depth and the flow velocity, the actual operation is difficult, and the acquisition effect is not ideal. Therefore, the two methods for collecting sinking eggs are difficult to meet the needs of investigation.

When the fish producing the adhesive eggs is bred, the fertilized eggs need to be adhered to roots of aquatic plants or trees to complete the embryo development process. The interference of wading engineering construction and reservoir water storage activity reduces the quantity of aquatic plants in the near bank zone and the waterfront zone of part of natural river reach sharply, so that the spawning site for producing viscous eggs in the water environment is seriously insufficient, and the ecological environment is influenced; in the investigation and research of the viscous roe, the sample collection and counting are often influenced by the roe attaching carrier, and the resource quantity is not accurately evaluated.

Aiming at a river section with serious sand mining, large-particle pebbles or stones in the bottom and rocks in the bottom, when benthonic animals are investigated and collected, the conventional collecting methods such as a peterson mud collector or a box mud collector are not ideal in collecting effect and difficult to collect benthonic biological samples.

Disclosure of Invention

The invention aims to provide an induction type aquatic organism collecting and water body purifying device, which realizes the induction type collection of adhesive fish eggs, adhesive and sinking fish eggs, benthic diatoms and benthic animals and has the function of purifying water body.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an induced aquatic organism collecting and water purifying apparatus, comprising an induced artificial fish nest and a bottom organism collecting apparatus, wherein the induced artificial fish nest and the bottom organism collecting apparatus are connected into an integral structure by an anchoring rope;

the induced artificial fish nest comprises:

the upper-layer module comprises a floating island module, aquatic plants and an upper frame, the upper frame is of a cubic structure, the floating island module is made of floating body materials and is just bound inside the upper frame, the aquatic plants are transplanted in the floating island module, and the buoyancy of the floating island module is set to always ensure that the induced artificial fish nest floats on the water surface;

the lower layer module comprises a lower frame, a viscous egg attachment module and a viscous egg attachment matrix, the lower frame is of a square structure, the upper layer and the lower layer are provided with reinforcing steel bar grids in a horizontal grid shape, the viscous egg attachment module is arranged in the lower frame, one reinforcing steel bar grid is vertically arranged at each node of each reinforcing steel bar grid, the viscous egg attachment module comprises a fixed rod in the center and a plurality of auxiliary rods which are sequentially arranged at intervals along the longitudinal direction and the circumferential direction of the fixed rod, the auxiliary rods are obliquely arranged downwards and outwards, the viscous egg attachment matrix is textile fabric and is sequentially arranged at intervals on the auxiliary rods, and the lower frame and the upper frame are connected up and down to form a square structure;

the pair of the attached diatom plates are horizontally and symmetrically arranged on two sides of the lower frame;

the bottom layer biological collection device comprises:

the shell-shaped curved surface shell comprises an upper shell body, a plurality of round holes are uniformly formed in the upper shell body, the front end of the upper shell body is a round head shape with the rear end gradually reduced forwards, and two sides of the upper shell body are similar to square;

lower casing, it is square body structure, the upper shed of casing down with the seamless closure in connection back can be dismantled to the lower shed of last casing, the front end of going up the casing is articulated through the connecting hinge with lower casing, the internal balancing weight that is provided with of inferior valve, casing upper shed border is provided with a plurality of steel sheets down and forms latticedly, supreme gravel layer and fixed cobble, the activity cobble are filled in proper order down to casing inside down, the rear end of going up casing and lower casing all is provided with guide vane.

Preferably, the upper frame and the lower frame are connected into a whole by binding the center positions of four sides.

Preferably, the anchor rope includes 4 connecting ropes and 5 bearing ropes, and the upper end of 4 connecting ropes is fixed in respectively four angle departments of lower part frame bottom, and one of them end connection of 5 bearing ropes is as an organic whole, and the lower extreme of 4 connecting ropes all passes through the hasp ring with another tip of 1 bearing rope wherein and is connected, and another tip of 4 bearing ropes is connected to respectively on four rings that rise that set up on the last casing in addition.

Preferably, the fixing rods are hung on the nodes of the reinforcing mesh through the near-closed hooks.

Preferably, the 4 bearing ropes connected to the hoisting ring are fixed with bionic aquatic weeds.

Preferably, the bottom of the front end of the lower shell is provided with anchoring teeth.

Preferably, the upper opening of the lower housing and the lower opening of the upper housing are seamlessly closed after being connected through bolts, corresponding plates with screw holes are arranged on two sides of the lower housing and the upper housing, and the lower housing and the upper housing are connected in a matched mode through bolts in the screw holes.

Preferably, the upper opening of the lower housing and the lower opening of the upper housing are seamlessly closed after being connected by a pair of connecting mechanisms on a pair of sides, and the connecting mechanism includes:

the fixed block is fixed on the side surface of the upper shell, the lower bottom surface of the fixed block is tightly attached to the lower opening surface of the upper shell, and a pair of slide rails is further arranged on the upper surface of the fixed block along the length direction;

the first hinge plate is positioned on the upper surface of the fixed block and is provided with a vertical through hole;

the connecting plate is hinged with the first hinge plate in the length direction, a pair of pulleys matched with a pair of slide rails are arranged on the lower bottom surface of the connecting plate, the pulleys are matched with the slide rails in a non-disengaging mode, a free end of the connecting plate in the length direction is provided with an inwards concave groove, and the groove is inwards concave along one side wall of the connecting plate in the width direction to form a pair of sliding grooves;

the second hinge plate is also positioned on the upper surface of the fixed block and is also provided with a vertical through hole;

the free end of the second sliding plate in the length direction is provided with a pair of sliding blocks extending outwards, the sliding plates are matched in the grooves of the connecting plate, and the pair of sliding blocks are matched in the pair of sliding grooves and can freely move along the pair of sliding grooves;

the sliding plate and the connecting plate are matched for the longest length, the first hinged plate and the second hinged plate just rotate to be vertically and closely attached to the side surfaces of the fixing block and the connecting block, and the first hinged plate and the second hinged plate are just correspondingly communicated with the through hole in the connecting block;

the auxiliary blocks are symmetrically positioned at two sides of the connecting block and fixed on the side surface of the lower shell, each auxiliary block is provided with a horizontal through hole corresponding to the through hole of the connecting block, a horizontal connecting rod is inserted into each through hole, the lower bottom surface of each auxiliary block is upwards sunken to form a vertical through hole penetrating through the horizontal through hole, and the side wall of each through hole is provided with a pair of limiting grooves which are horizontally sunken outwards;

the buoyancy column is made of a buoyancy material, the side wall of the buoyancy column is provided with a pair of limiting rods, the buoyancy column is matched in the through hole, the limiting rods are limited in the limiting grooves, and when the limiting rods are tightly attached to the top surface of the limiting grooves, the upper end of the buoyancy column is located in the through hole.

The invention at least comprises the following beneficial effects:

1. the device mainly comprises an induction type artificial fish nest and a bottom layer organism collecting device which are connected through an anchoring rope to form an organic whole which can adapt to aquatic organism monitoring and collecting, water body purification and aquatic organism habitat construction of a river channel for diversity recovery under the conditions of different water depths and different flow rates.

2. All parts of the device can be disassembled, so that the device is convenient to assemble, sample collection and the like.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the reinforcing mesh structure of the lower frame of the present invention;

FIG. 3 is a front view of a bottom layer biological collection device of the present invention;

FIG. 4 is a top view of a bottom layer biological collection device of the present invention;

FIG. 5 is a horizontal cross-sectional view of a filling substrate of the substrate biological collection device of the present invention;

FIG. 6 is a vertical cross-sectional view of a filling substrate of the substrate biological collection device of the present invention;

FIG. 7 is a front view of the coupling mechanism of the present invention;

fig. 8 is a plan view of the upper surface of the fixing block of the present invention.

Description of reference numerals:

101. the artificial wetland comprises an upper frame, 102, a floating island module, 103, aquatic plants, 201, a lower frame, 202, a viscous egg attachment module, 203, a viscous egg attachment substrate, 301, a growing diatom attachment plate, 401, a connecting rope, 402, a bearing rope, 403, a lock catch ring, 404, a bionic aquatic weed, 501, an upper shell, 502, a lower shell, 503, a round hole, 504, a lifting ring, 505, a bolt, 506, a connecting hinge, 507, a balancing weight, 508, a steel sheet, 509, a gravel layer, 510, a fixed pebble, 511, a movable pebble, 512, an anchoring tooth, 513, a guide vane, 601, a fixed block, 602, a first hinged plate, 603, a connecting plate, 604, a groove, 605, a second hinged plate, 606, a sliding plate, 607, a sliding block, a 608, a connecting block, 609, an auxiliary block, 610, a connecting rod, 611, a limiting groove, 612, a buoyancy column, 613 and a limiting rod.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It is to be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials, if not otherwise specified, are commercially available; in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 6, the invention provides an induced aquatic organism collecting and water purifying device, which comprises an induced artificial fish nest and a bottom layer organism collecting device, wherein the induced artificial fish nest and the bottom layer organism collecting device are connected into an integral structure through an anchoring rope;

the induced artificial fish nest comprises:

the upper-layer module comprises a floating island module 102, aquatic plants 103 and an upper frame 101, wherein the upper frame 101 is of a cubic structure, the floating island module 102 is made of floating body materials and is just bound inside the upper frame 101, the aquatic plants 103 are transplanted into the floating island module 102, and the buoyancy of the floating island module 102 is set to always ensure that the induced artificial fish nest floats on the water surface;

the lower-layer module comprises a lower-layer frame 201, a sticky egg attaching module 202 and a sticky egg attaching matrix 203, wherein the lower-layer frame 201 is of a square structure, the upper layer and the lower layer are provided with horizontal latticed reinforcing steel bar grids, the sticky egg attaching module 202 is arranged inside the lower-layer frame 201, one reinforcing steel bar grid is vertically arranged at a node of each reinforcing steel bar grid, the sticky egg attaching module 202 comprises a fixed rod in the center and a plurality of auxiliary rods which are sequentially arranged at intervals along the longitudinal direction and the circumferential direction of the fixed rod, the auxiliary rods are obliquely arranged downwards and outwards, the sticky egg attaching matrix 203 is textile fabric and is sequentially arranged at intervals on the auxiliary rods, and the lower-layer frame 201 and the upper-layer frame 101 are connected up and down to form a square;

a pair of the diatom attachment plates 301 which are horizontally and symmetrically disposed on both sides of the lower frame 201;

the bottom layer biological collection device comprises:

the shell-shaped curved surface shell comprises an upper shell 501, a plurality of round holes 503 are uniformly formed in the upper shell 501, the front end of the upper shell 501 is a round head shape with the rear end gradually reduced forwards, and two sides of the upper shell 501 are similar to square;

lower casing 502, it is the square body structure, the upper shed of lower casing 502 with seamless closure after the connection can be dismantled to the lower shed of upper casing 501, the front end of upper casing 501 is articulated through being connected hinge 506 with lower casing 502, be provided with the balancing weight 507 in the lower casing 502, lower casing 502 upper shed border is provided with a plurality of steel sheets 508 and forms latticedly, lower casing 502 is inside from supreme gravel layer 509 and fixed cobble 510, the activity cobble 511 of filling in proper order down, the rear end of upper casing 501 and lower casing 502 all is provided with guide vane 513.

In the above technical solution, the upper frame 101 and the lower frame 201 are made of stainless steel or a firm, reliable and durable material. The lower portion frame 201 is welded or bound into a grid shape to finally form a cuboid frame, sticky egg attachment modules 202 are uniformly distributed on each node of the grid-shaped reinforcing steel bar grids, sticky egg attachment matrixes 203 are uniformly distributed and fixed on auxiliary rods of the sticky egg attachment modules 202, and the upper end and the lower end of each fixed rod are respectively arranged on corresponding nodes of the upper layer reinforcing steel bar grid and the lower layer reinforcing steel bar grid. The sticky egg attaching matrix 203 is a durable and easily attached textile fabric which is uniformly distributed on the sticky egg attaching module 202 to form a bionic aquatic weed clump, which is beneficial to the spawning and spawning amount evaluation of sticky egg fishes. The attached plates 301 for the attached diatoms are two relatively smooth plastic plates with a fixed area (preferably 0.5 square meter), fixed on the left and right sides of the lower frame 201, and can be detached and fixed, so that the attached and collected diatoms can be conveniently attached and collected. The upper shell 501 and the lower shell 502 are hinged through a connecting hinge 506, so that the two shells can be opened and closed, after the two shells are closed, the two shells are locked through a safety bolt 505 inserted into a safety screw hole, and two sides of the upper shell 501 and the lower shell 502 are correspondingly provided with plates with screw holes for connecting the bolt 505. The upper stream part (namely the described front end) of the bottom layer biological collection device is designed into a spindle shape, the lower stream part (namely the described rear end and the described tail end) is designed into an approximate cuboid shape, and the tail part is provided with a guide vane 513 for guiding the flow. The whole device forms a cavity similar to a shell shape after being closed, is beneficial to attraction and is suitable for spawning of partial bottom fishes and inhabiting of partial benthos. The upper shell 501 is a curved shell made of stainless steel materials, round holes 503 are uniformly distributed in the upper part area of the upper shell 501 to play a role in guiding flow, meanwhile, sinking eggs produced by part of fishes of the lower layer of the bionic aquatic weeds 404 in the anchoring rope sink through the holes and are stored in the device, collection of the sinking eggs is facilitated, the sinking eggs and two side surfaces parallel to the flow direction of a river are approximately designed into a rectangle to play a role in guiding flow and seamlessly closing with the lower shell 502. The lower shell 502 is made of stainless steel, a balancing weight 507 is welded inside the lower shell, and an anchoring tooth 512 is welded at the upstream end of the bottom of the lower shell 502. Steel sheets 508 with certain width are fixed on the upper part edge of the lower shell 502, the lower shell 502 is surrounded to form a semi-closed cavity with grids, when in use, substrate materials such as fine sand, gravel, pebble and the like are filled according to certain requirements, the substrate materials are divided into movable pebbles 511, fixed pebbles 510 and gravel layers 509 according to functions and are tiled, and a plurality of substrate unit modules which are stable, have strong anti-scouring capability and simulate the habitat of benthonic animals are formed through the surrounding of the steel sheets 508.

The device can be arranged in water areas of rivers and reservoirs close to the bank, is suitable for still water, slow flow or running water environments, is suitable for water areas with the water depth range of about 5-30 m, can adjust the weight of the balance weight, the length of the anchoring teeth 512, the number of modules of the induced artificial fish nests and the like according to the water depth, the flow speed, the river terrain and the substrate composition of the field water areas, and finally meets the requirements of investigation and research areas; and the bottom layer biological acquisition device can also be subjected to modular optimization design and finally spliced to form a large-scale bottom layer biological acquisition system.

In another technical scheme, the upper frame 101 and the lower frame 201 are connected into a whole by binding the center positions of four sides. The upper frame 101 and the lower frame 201 are firmly bound to form an organic whole during operation, and can be disassembled into two parts during maintenance and inspection, so that the fish egg inspection of the adhesive egg attachment module 202 is facilitated.

In another technical scheme, the anchoring rope includes 4 connecting ropes 401 and 5 bearing ropes 402, the upper ends of the 4 connecting ropes 401 are respectively fixed at four corners of the bottom of the lower frame 201, one end of each of the 5 bearing ropes 402 is connected into a whole, the lower ends of the 4 connecting ropes 401 are connected with the other end of each of the 1 bearing ropes 402 through a locking ring 403, and the other ends of the 4 bearing ropes 402 are respectively connected to four lifting rings 504 arranged on the upper shell 501.

In the above technical solution, the lock catch ring 403 has the main functions of connecting the induced artificial fish nest and the bottom biological collecting device to form a whole, and simultaneously facilitating the independent lifting and inspection of the bottom biological collecting device. The upper shell 501 is distributed with 4 hoisting rings 504 for connecting the anchoring rope with the induced artificial fish nest or hoisting the device. The installation positions of the four lifting rings 504 are arranged by taking the gravity center of the bottom layer biological acquisition device as the center, so that the bottom layer biological acquisition device is kept in a horizontal state and does not incline after the bearing ropes 402 are connected.

In another technical scheme, the fixing rods are hung on nodes of the reinforcing mesh through near-closed hooks. The sticky egg attaching modules 202 are hung on the nodes of the reinforcing mesh through the near-closed hooks, so that each sticky egg attaching module 202 can be detached and the fish eggs can be checked conveniently.

In another technical scheme, the bionic aquatic weed 404 is fixed on 4 bearing ropes 402 connected to the hoisting ring 504. The middle and lower layer of the anchoring rope is provided with a bionic aquatic weed 404 for attracting fish to gather and further spawning and breeding, and meanwhile, sheltering places can be provided for the larvae, the young fishes and the juvenile fishes.

In another solution, the bottom of the front end of the lower shell 502 is provided with an anchoring tooth 512. The anchoring teeth 512 function to fix the bottom layer biological collection device, so that the bottom layer biological collection device has certain flow velocity resistance and scouring resistance. The bottom layer biological acquisition device can serve as a fixing anchor of the induction type artificial fish nest.

In another technical solution, an upper opening of the lower housing 502 and a lower opening of the upper housing 501 are connected by a bolt 505 and then are seamlessly closed, corresponding plates with screw holes are respectively arranged on two sides of the lower housing 502 and the upper housing 501, and the lower housing 502 and the upper housing 501 are connected by the bolt 505 being fitted in the screw holes.

In another technical solution, as shown in fig. 7 and 8, the upper opening of the lower housing 502 and the lower opening of the upper housing 501 are seamlessly closed after being connected through a pair of connection mechanisms on a pair of sides, where the connection mechanisms include:

the fixing block 601 is fixed on the side surface of the upper shell 501, the lower bottom surface of the fixing block 601 is tightly attached to the lower opening surface of the upper shell 501, and the upper surface of the fixing block 601 is further provided with a pair of slide rails along the length direction;

the first hinge plate 602 is positioned on the upper surface of the fixed block 601 in an initial state, the first hinge plate 602 is vertically attached to the side surface of the fixed block 601 in a state after connection is completed, and the first hinge plate 602 is provided with a vertical through hole;

a connecting plate 603, which is hinged to the first hinge plate 602 in a length direction, for example, the first hinge plate 602 can rotate to a vertical state when being connected by a hinge connecting bottom surface, while the connecting plate 603 is kept horizontally on the fixing block 601, a pair of pulleys cooperating with a pair of slide rails are provided on a lower bottom surface of the connecting plate 603, the pulleys cooperate with the slide rails without disengaging, for example, the pulleys magnetically attract the slide rails or cooperate with any other existing manner, a free end in the length direction of the connecting plate 603 has an inwardly recessed groove 604, one side wall of the groove 604 in a width direction of the connecting plate 603 is inwardly recessed to form a pair of sliding grooves, and the length of the groove 604 is equal to the length of the sliding plate 606;

a second hinge plate 605, which is also located on the upper surface of the fixing block 601, wherein the second hinge plate 605 also has a vertical through hole;

a sliding plate 606, which is hinged with the second hinge plate 605 in the length direction, for example, a hinge connection, the free end of the length direction of the second sliding plate 606 has a pair of sliding blocks 607 extending outwards, the sliding plate 606 fits in the groove 604 of the connecting plate 603, the pair of sliding blocks 607 fits in the pair of sliding grooves and can freely move along the pair of sliding grooves, the sliding plate 606 and the connecting plate 603 realize non-lift slip through the sliding grooves and the sliding blocks 607;

a connecting block 608 fixed to a side surface of the lower housing 502 and having an upper top surface abutting against an upper opening surface of the lower housing 502, the connecting block 608 having a through hole in a horizontal direction, the connecting block 608 being disposed opposite to the fixing block 601 in a vertical direction, wherein when the sliding plate 606 is fitted to the connecting plate 603 for a maximum length, the first hinge plate 602 and the second hinge plate 605 are just rotated to abut against the side surfaces of the fixing block 601 and the connecting block 608 vertically, and the through holes of the first hinge plate 602 and the second hinge plate are just communicated with the through hole of the connecting block 608;

the auxiliary blocks 609 are a pair and are symmetrically positioned at two sides of the connecting block 608, the auxiliary blocks 609 are fixed on the side surface of the lower shell 502, the auxiliary blocks 609 are provided with horizontal through holes corresponding to the through holes of the connecting block 608, horizontal connecting rods 610 penetrate through the through holes, the lower bottom surface of the auxiliary blocks 609 is upwards recessed to form vertical through holes penetrating through the horizontal through holes, and the side walls of the through holes are provided with a pair of limiting grooves 611 which are horizontally recessed outwards;

a buoyancy column 612 made of a buoyancy material, so that the buoyancy column 612 has a certain buoyancy in water, which is much less than the weight of the lower housing 502, wherein the sidewall of the buoyancy column 612 has a pair of limiting rods 613, the buoyancy column 612 fits into the through hole and can move up and down freely in the through hole, the pair of limiting rods 613 are limited in the pair of limiting grooves 611 and can move up and down within the height range of the limiting grooves 611, and when the limiting rods 613 are tightly attached to the upper surface of the limiting grooves 611, the upper end of the buoyancy column 612 is located in the through hole.

In the above technical solution, if the upper housing 501 and the lower housing 502 are detachably connected by the bolt 505, the bolt 505 is easily corroded or threaded under long-time detection in water, so that the bolt 505 cannot be detached to realize detachment of the upper housing 501 and the lower housing 502, and further, a sample in the bottom layer biological collection device cannot be smoothly taken down, so that the device of the present invention has a non-smooth use process, and even cannot realize its own function, and therefore, a connection mechanism of the lower housing 502 and the upper housing 501 needs to be designed to realize normal and smooth detachment and installation of the device of the present invention. Fig. 7 is a schematic structural diagram of the connection completed by the connection mechanism, and fig. 8 is a schematic structural diagram of the longest matching length of the sliding plate 606 and the connection plate 603. In the initial state, the first hinge plate 602 and the second hinge plate 605 are both horizontally located on the upper surface of the fixed block 601, and the sliding plate 606 is located in the connecting plate 603. When the upper shell 501 and the lower shell 502 need to be connected in a sealing manner, the upper shell 501 rotates to be positioned on the lower shell 502, the first hinge plate 602 and the second hinge plate 605 are pulled outwards respectively, the sliding plate 606 slides out of the connecting plate 603, when the matching length of the first hinge plate 602 and the second hinge plate 605 reaches the maximum, the first hinge plate 602 and the second hinge plate 605 automatically turn to be vertical and downward and are positioned on the side surfaces of the fixed block 601 and the connecting block 608, at the moment, the connecting rod 610 horizontally penetrates through the through hole, the auxiliary block 609, the first hinge plate 602, the connecting block 608, the second hinge plate 605 and the through hole of the auxiliary block 609 are sequentially penetrated through to realize connection, two ends of the connecting rod 610 protrude out of the auxiliary block 609, in order to fix the connecting rod 610, the connecting rod 610 is prevented from being separated from the through hole, a buoyancy column 612 is arranged, and under the action of buoyancy, the buoyancy column 612, the vertical abutment of the connecting rod 610 is achieved, thereby ensuring that the connecting rod 610 does not disengage from the through hole to a certain extent.

The arrangement, installation and working process of the invention are as follows:

(1) assembling and arranging induction type artificial fish nest

First, the upper frame 101 and the lower frame 201 of the induction type artificial fish nest are separately welded. The layout of the upper frame 101 is the same as that of the surface layer steel bars of the lower frame 201, and stainless steel bars are welded into a grid shape; according to the layout of fig. 2, the lower frame 201 is welded into a cube shape; one end of each of 4 anchoring ropes with equal length is respectively fixed on the steel bar at the bottom layer of the lower frame 201, and the other ends are connected to the locking buckle 403;

secondly, binding and fixing floating body materials of the floating island module 102 to the upper frame 101, and transplanting aquatic plants 103 which are selected in advance into the floating island module 102; the newborn diatom attaching plate 301 is fixed to the edge of the surface frame of the lower frame 201, and the attaching plate is kept horizontal; the sticky egg attaching matrix 203 is hung and fixed on the sticky egg attaching module 202, and the whole complete sticky egg attaching module 202 is hung on each node of the upper layer reinforcing mesh of the lower frame part, so that the firmness is ensured, and the later-stage disassembly is facilitated;

then, binding the upper part structure and the lower part structure of the assembled induced artificial fish nest together, wherein the binding point is positioned at the position of 4 middle edges of the upper reinforcing steel bars of the upper frame 101 and the lower frame 201, so that the firmness and the easiness in disassembly are ensured; tying the assembled induced artificial fish nest with a safety rope, placing the floating body of the floating island module 102 in water to test whether the volume of the floating body meets the bearing requirement, and adjusting the volume of the floating body to ensure that the artificial fish nest safely and reliably floats on the water surface; after the experiment and debugging are finished, the whole device is placed on the shore of a preselected water area or on a ship for standby.

(2) Assembling and arranging a substrate biological collection device

Firstly, a stainless steel sheet 508 or a thinner steel plate material is selected, and according to the structural design shown in the attached figures 3 and 4, all parts are prefabricated, welded and connected in advance to manufacture a shell of the bottom layer biological acquisition device which can be opened, closed and locked; a weight prefabricated in a designed shape is placed in the lower case 502; welding a lifting ring 504 at a preset position to facilitate the lifting of the whole device;

secondly, filling substrate materials such as fine sand, gravel, pebbles and the like prepared in advance according to the arrangement mode designed by the attached drawings 5 and 6 and the filling sequence of a gravel layer 509, movable pebbles 511 and fixed pebbles 510, and ensuring the porosity and the water permeability as far as possible on the premise of ensuring the stability and the scouring resistance of the substrate;

then, locking the substrate material-filled substrate biological acquisition device, fixing one end of 4 equilong anchor ropes on 4 hoisting rings 504 respectively, tying the other end of the anchor ropes on the lock catch ring 403, slowly placing the anchor ropes on the riverbed in a preset water area after hoisting, and ensuring that the head of the device (namely the round head-shaped front end of the upper shell 501) faces the upstream of the riverway when placing the anchor ropes; whether the bottom layer biological acquisition device is firmly anchored on the riverbed or not is tested by tensioning the anchoring rope, and the placement position of the device is continuously finely adjusted, so that the device is firmly anchored on the riverbed through self weight.

(3) Connected to form an integral device

Connecting the anchoring rope bound on the induction type artificial fish nest with a pre-anchored bottom layer organism collecting device through a lock catch ring 403, thereby forming an integral induction type aquatic organism collecting and water body purifying device to start to use and operate; the length of the anchoring rope is adjusted, so that the whole system can adapt to water level fluctuation and flow velocity change in a certain range of a river channel, and later checking, maintenance and other work; in order to ensure the safety of the whole device, a safety rope is bound on the lock catch ring 403 and the induced artificial fish nest, and the other end of the safety rope is firmly fixed on the bank.

(4) Aquatic organism collecting, checking and counting

When the device is operated, checking or collecting aquatic organisms at a specified time according to a designed aquatic organism monitoring scheme;

when sticky eggs are collected, the 3 sides fixedly binding the upper frame 101 and the lower frame 201 of the induction type artificial fish nest are unbound, so that the upper frame 101 and the lower frame 201 can be opened without being separated; after the fish eggs are opened, the fish eggs on each adhesive egg adhesion module 202 are inspected after being taken down in sequence, and the fish eggs are hung to the original position after the inspection;

when the living diatom is collected, the living diatom attachment plate 301 is taken down, the living organisms are washed to the sample bottle by a toothbrush or other soft and dense brushes and then bound to the original position;

when benthonic organisms and sinking fish eggs are collected, firstly hoisting the bottom layer organism collecting device to the shore or the ship, opening the shell of the bottom layer organism collecting device, and collecting and recording the benthonic organisms and the sinking fish eggs through the steps of flushing, screening, checking, collecting and the like according to the sequence of the fixed pebbles 510, the movable pebbles 511 and the gravel layer 509;

after the whole sampling and checking process is finished, the induced artificial fish nest is assembled, the substrate material of the bottom layer biological acquisition device is filled, and the induced artificial fish nest is lifted and arranged to the original position after the whole device is fixedly connected.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.