CN114176042A

CN114176042A - Unpowered self-cleaning fry breeding pond

Info

Publication number: CN114176042A
Application number: CN202210019771.XA
Authority: CN
Inventors: 彭超
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-03-15

Abstract

The invention discloses a unpowered self-cleaning fry breeding pond, which comprises a pond body, wherein backflow cavities are formed in interlayers on side walls on two sides of the pond body, a fry groove is formed in the pond, supports are fixedly connected to two sides of the bottom of the pond body, through holes are formed in two sides of each support, a plurality of springs are fixedly connected to two sides of the top of each support, a water guide opening is formed in the center of the bottom of the fry groove, a backflow mechanism is arranged below the water guide opening, a blocking net is arranged above the backflow mechanism, filtering mechanisms are arranged on two sides of an inner cavity of the fry groove, storage cavities are formed in outer wall surfaces on two sides of the fry groove, and a cleaning mechanism is arranged in each storage cavity. The water circulating filter has the characteristics of novel structure, reasonable design, convenience in use, high filtering efficiency, good effect, low energy consumption, energy conservation and environmental protection, capability of circularly filtering the water body in the breeding pond without additional power so as to remove impurities in the water body, capability of cleaning the inner wall of the breeding pond simultaneously so as to avoid bacteria breeding and the like.

Description

Unpowered self-cleaning fry breeding pond

Technical Field

The invention relates to the technical field of fry breeding, in particular to an unpowered self-cleaning fry breeding pond.

Background

The fry is also called 'fish flower' or 'fish seed', and refers to young fish which is hatched soon, and the body length is generally 6-9 mm. The fry includes artificially propagated fry and natural fry from rivers. After the fry are hatched, the fry are usually bred and cultivated to a certain specification before being released on the water surface. In order to improve the breeding benefit and the breeding survival rate, the breeding is mostly carried out by adopting an artificial breeding mode at present, and particularly, for high-grade fishes such as odontobutis obscura, indoor artificial breeding needs to be carried out by means of a breeding pond.

The biggest problem of breeding pond cultivation is that a large amount of fry excrement and bait residues can be produced in the breeding process, and if the impurities are not cleaned in time, the water in the breeding pond can be polluted, so that the fry is dead, and the survival rate of the whole fry breeding is affected. Traditional breed pond water impurity clearance mainly relies on the manual work to go on, this kind of mode wastes time and energy, high in labor strength, not only the cleaning efficiency is low, also need continuously take the water out to the outside from breeding the pond through outside power equipment simultaneously and filter, thereby cause a large amount of energy resource consumptions, be unfavorable for energy-concerving and environment-protective, furthermore, artifical cleanness often can only filter the impurity in the water, and can't clean the inner wall of breeding the pond simultaneously, various bacteriums will breed to the inner wall of a long time breeding the pond, also can cause the death of fry equally, consequently, the above-mentioned problem is solved to a current design unpowered automatically cleaning fry breeding pond.

Disclosure of Invention

The invention solves the technical problems that the fry breeding pond in the prior art is inconvenient to clean, needs to be continuously replaced by external power equipment, causes a large amount of energy consumption, is not beneficial to energy conservation and environmental protection, cannot simultaneously clean the inner wall of the breeding pond, is easy to breed bacteria and the like, and provides the unpowered self-cleaning fry breeding pond. The unpowered self-cleaning fry breeding pool has the characteristics of novel structure, reasonable design, convenience in use, no need of extra power, capability of performing circulating filtration on water in the breeding pool to remove impurities in the water, high filtration efficiency, good effect, low energy consumption, energy conservation and environmental protection, and capability of cleaning the inner wall of the breeding pool simultaneously to avoid bacterial breeding and the like.

In order to achieve the purpose, the invention provides the following technical scheme: a unpowered self-cleaning fry breeding pond comprises a pond body, wherein backflow cavities are formed in interlayers on the side walls on two sides of the pond body, a fry groove is formed in the pond body, supports are fixedly connected to two sides of the bottom of the pond body, the supports are n-shaped, through holes are formed in two sides of each support, a plurality of springs are fixedly connected to two sides of the top of each support, the top ends of the springs are fixedly connected to the bottom of the fry groove, a water guide opening is formed in the center of the bottom of the fry groove, the water guide opening is circular, a backflow mechanism is arranged below each water guide opening, a blocking net is arranged above each water guide opening, mounting blocks are fixedly connected to the bottoms of two sides of each blocking net, a first bolt is connected to each mounting block in a threaded mode, a first threaded groove matched with the first bolt is formed in the surface of the bottom of the fry groove, and filtering mechanisms are arranged on two sides of an inner cavity of the fry groove, the outer wall surfaces of two sides of the cleaning device are provided with storage cavities, and cleaning mechanisms are arranged in the storage cavities.

Preferably, the backflow mechanism comprises a filter cartridge and a backflow pipe, the filter cartridge is located below the water guide port, water guide holes are formed in the cartridge walls on two sides of the filter cartridge, a sealing cover is arranged at the top of the filter cartridge, a rotary block is fixedly connected to the top of the sealing cover, a protruding block is fixedly connected to the bottom of the sealing cover, the cross section of the protruding block is circular, external threads are formed in the surface of the side wall of the protruding block, internal threads matched with the protruding block are carved on the surface of the inner wall of the top end of the filter cartridge, a filter element is installed at the bottom of the protruding block, a water guide pipe is fixedly connected to the bottom of the filter cartridge, the water guide pipe is communicated with the inner cavity of the filter cartridge, two ends of the water guide pipe penetrate through holes in the side wall of the support, pipe orifices at two ends of the water guide pipe penetrate through the inner wall of the cell body and are communicated with the backflow cavity, the backflow pipe is fixedly connected to two sides of the top of the cell body, one end of the backflow pipe is communicated with the backflow cavity, and the end pipe orifice of the return pipe extends to the upper part of the fry groove.

Preferably, the outer diameter of the filter cartridge is equal to the diameter of the water guide port, the centers of the filter cartridge and the water guide port are located on the same straight line, the side wall of the rotary block is arc-shaped and is recessed inwards, and herringbone anti-skidding lines are carved on the surface of the side wall of the rotary block.

Preferably, filtering mechanism includes the mounting panel, the lateral wall fixedly connected with filter-tank of mounting panel, the equal threaded connection in its both ends has the second bolt, the inner wall surface in fry groove set up with second bolt matched with second thread groove, the filter-tank is located the terminal orificial under of back flow, and the hole of permeating water has been seted up to its bottom, just be provided with the filter-stand in the filter-tank, the filter-stand is the U font, and its inner wall is provided with a plurality of layers of filter screen.

Preferably, the both sides top of filtering the frame all outwards outstanding, its outstanding department bottom fixedly connected with fixture block, the draw-in groove with fixture block matched with has all been seted up to the both sides top surface of rose tank, the draw-in groove is located same straight line with the center of fixture block, the filter screen is the equidistance setting, and its mesh number is according to from last order crescent down.

Preferably, the cleaning mechanism comprises a cleaning plate, the cleaning plate is located in the storage cavity, a fixing rod is fixedly connected between the side wall of the cleaning plate and the bottom of the storage cavity, a layer of cleaning brush is arranged on the surface, close to the inner wall of the tank body, of the cleaning plate, and the cleaning brush is attached to the surface of the inner wall of the tank body.

Preferably, the equal fixedly connected with buffer board in bottom both sides in fry groove, the buffer board is located the support directly over, and its bottom surface evenly is provided with a plurality of buffer block, the buffer block is hemisphere rubber block structure.

Compared with the prior art, the invention has the beneficial effects that:

1. the circulating water purifier has the advantages that the structure is novel, the design is reasonable, the use is convenient, the water in the breeding pool can be circularly filtered under the condition of no need of extra power by means of the mutual matching of all the components in the backflow mechanism and the continuous change of the water quantity in the fry groove, so that the impurity particles such as fry excrement, bait residues and the like in the water can be effectively removed, the energy consumption is low, the energy conservation and the environmental protection are facilitated, and the perfect combination of physics and hydromechanics in fry breeding is a model for creative application;

2. the filter element in the backflow mechanism can carry out primary filtration on the water body in the fry tank, the water body after the primary filtration can be guided into the filter mechanism through the mutual matching of all components in the backflow mechanism, and the water body can be subjected to multiple filtration through the mutual matching of all components in the filter mechanism, so that the filter effect of the water body can be further improved, the fry excrement, bait residues and other impurity particles in the water body can be thoroughly removed, and the water quality in the fry tank is effectively ensured;

3. in the process of water body circulation filtration, the inner wall surface of the pool body can be scraped and brushed in a reciprocating manner through the mutual matching of all the components in the cleaning mechanism under the condition of no need of additional power, so that stains adhered to the inner wall surface of the pool body can be effectively removed, and therefore, the death of fish fries caused by various bacteria breeding in the breeding pool can be effectively avoided;

4. according to the invention, the related structural components for water body filtration can be detached at any time according to requirements so as to clean or replace each filtering component, so that the influence of the subsequent water body filtration effect of the breeding pond due to the adhesion of impurity particles such as fry excrement, bait residues and the like on the surface of each filtering component after the filtering component is used for a long time can be effectively prevented.

Drawings

FIG. 1 is a perspective view of the external structure of the present invention;

FIG. 2 is a schematic view of the overall structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the tank body;

FIG. 4 is an enlarged view taken at A in FIG. 3;

FIG. 5 is a schematic view of the internal structure of the fry vat;

FIG. 6 is an enlarged view of FIG. 5 at B;

fig. 7 is an enlarged view of fig. 5 at C.

Reference numbers in the figures: 1. a tank body; 2. a reflux cavity; 3. fry troughs; 4. a support; 5. a through hole; 6. a spring; 7. a water guide port; 8. blocking the net; 9. mounting blocks; 10. a first bolt; 11. a first thread groove; 12. a receiving cavity; 13. a filter cartridge; 14. a return pipe; 15. a water guide hole; 16. a sealing cover; 17. rotating the block; 18. a bump; 19. a filter element; 20. a water conduit; 21. mounting a plate; 22. a filter tank; 23. a second bolt; 24. a second thread groove; 25. water permeable holes; 26. a filter frame; 27. a filter screen; 28. a clamping block; 29. a card slot; 30. cleaning the plate; 31. fixing the rod; 32. a cleaning brush; 33. a buffer plate; 34. and a buffer block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a unpowered self-cleaning fry breeding pond comprises a pond body 1, backflow cavities 2 are formed in side wall interlayers at two sides of the pond body 1, fry grooves 3 are formed in the pond, a support 4 is fixedly connected to two sides of the bottom of the pond body 1, the support 4 is n-shaped, through holes 5 are formed in two sides of the support, a plurality of springs 6 are fixedly connected to two sides of the top of the support 4, the top ends of the springs 6 are fixedly connected to the bottom of the fry grooves 3, when water is injected into the fry grooves 3, the fry grooves 3 can move downwards under the action of gravity and compress the springs 6, when the amount of water in the fry grooves 3 is reduced, the fry grooves 3 can move upwards under the elastic reset action of the springs 6, the fry grooves 3 can reciprocate up and down by controlling and adjusting the amount of water in the fry grooves 3, water guide ports 7 are formed in the centers of the bottoms of the fry grooves 3, and the water guide ports 7 are circular, a backflow mechanism is arranged below the fry guiding device, a blocking net 8 is arranged above the water guiding opening 7, mounting blocks 9 are fixedly connected to the bottoms of two sides of the blocking net 8, first bolts 10 are connected to the mounting blocks 9 in a threaded manner, first thread grooves 11 matched with the first bolts 10 are formed in the bottom surface of the fry groove 3, the tail ends of the first bolts 10 can be screwed into the corresponding first thread grooves 11, the blocking net 8 can be fixedly mounted above the water guiding opening 7 through the mutual matching between the first bolts 10 and the first thread grooves 11, so that the fry can be blocked by the blocking net 8 to prevent the fry from entering the water guiding opening 7 by mistake, filter mechanisms are arranged on two sides of an inner cavity of the fry groove 3, accommodating cavities 12 are formed in the outer wall surfaces of two sides of the fry groove, and cleaning mechanisms are arranged in the accommodating cavities 12;

the backflow mechanism comprises a filter cartridge 13 and a backflow pipe 14, the filter cartridge 13 is positioned below the water guide port 7, water guide holes 15 are formed in the walls of two sides of the filter cartridge 13, a sealing cover 16 is arranged at the top of the filter cartridge 13, the outer diameter of the filter cartridge 13 is equal to the diameter of the water guide port 7, the centers of the filter cartridge 13 and the water guide port 7 are positioned on the same straight line, the filter cartridge 13 can penetrate through the water guide port 7 and extend into the blocking net 8, when the filter cartridge 13 enters the blocking net 8, water in the fry groove 3 can flow into the filter cartridge 13 through the water guide holes 15, a rotary block 17 is fixedly connected to the top of the sealing cover 16, a convex block 18 is fixedly connected to the bottom of the rotary block 17, the cross section of the convex block 18 is circular, external threads are formed in the surface of the side wall of the convex block, internal threads matched with the convex block 18 are carved on the surface of the inner wall of the top of the filter cartridge 13, a filter element 19 is installed at the bottom of the convex block 18, and the rotary block 17 can drive the sealing cover 16 to rotate together with the convex block 18, so that the convex block 18 and the filter element 19 at the bottom are connected together by screw thread in the filter cartridge 13, the water body entering the filter cartridge 13 can be primarily filtered by the filter element 19, so as to adsorb partial fry excrement, bait residue and other impurity particles in the water body, the side wall of the rotary block 17 is arc-shaped and is inwards concave, herringbone anti-slip lines are carved on the surface of the side wall of the rotary block 17, the friction force between hands and the rotary block 17 can be increased, so as to assemble and disassemble the filter element 19, thereby avoiding slipping and falling off the hands during assembly and disassembly, the bottom of the filter cartridge 13 is fixedly connected with a water guide pipe 20, the water guide pipe 20 is communicated with the inner cavity of the filter cartridge 13, the two ends of the water guide pipe 20 penetrate through the through holes 5 at the two sides of the bracket 4, the pipe orifices at the two ends of the water guide pipe 20 penetrate through the inner wall of the cell body 1 and are communicated with the return cavity 2, the return pipe 14 is fixedly connected with the two sides of the top of the cell body 1, and the pipe orifice at one end is communicated with the return cavity 2, the end orifice of the return pipe 14 extends to the upper part of the fry groove 3, the water preliminarily filtered by the filter element 19 can flow into the water guide pipe 20 through the filter cartridge 13 and enter the return cavity 2 along the water guide pipe 20, the inner diameter of the return cavity 2 is smaller, the liquid level of the water rapidly rises after the water enters the return cavity 2 until the water enters the return pipe 14, and the water preliminarily filtered can be guided into the fry groove 3 again through the return pipe 14;

the filtering mechanism comprises a mounting plate 21, a filtering tank 22 is fixedly connected to the side wall of the mounting plate 21, second bolts 23 are in threaded connection with both ends of the filtering tank 22, a second threaded groove 24 matched with the second bolt 23 is formed in the inner wall surface of the fry tank 3, the tail end of each second bolt 23 can be screwed into the corresponding second threaded groove 24, the mounting plate 21 and the filtering tank 22 can be fixedly mounted on the inner wall of the top end of the fry tank 3 together through the mutual matching between the second bolts 23 and the second threaded grooves 24, the filtering tank 22 is positioned right below the pipe orifice at the tail end of the return pipe 14, a water permeable hole 25 is formed in the bottom of the filtering tank, a filtering rack 26 is arranged in the filtering tank 22, water after primary filtering can be guided into the filtering tank 22 through the return pipe 14 and flows into the filtering rack 26, the filtering rack 26 is U-shaped, a plurality of layers of filtering screens 27 are arranged on the inner wall of the filtering rack 26, the top ends of both sides of the filtering rack 26 protrude outwards, the bottom of the projecting part is fixedly connected with a fixture block 28, the top surfaces of two sides of the filter tank 22 are respectively provided with a clamping groove 29 matched with the fixture block 28, the centers of the clamping groove 29 and the fixture block 28 are positioned on the same straight line, the fixture block 28 can be inserted into the clamping groove 29, the filter rack 26 can be fixed in the filter tank 22 through the mutual matching between the fixture block 28 and the clamping groove 29 so as to improve the stability of the filter rack 26 and prevent the filter rack from shaking and shifting, the filter screens 27 are arranged at equal intervals, the mesh number of the filter screens is gradually increased from top to bottom, when water flows into the filter rack 26, the water can be subjected to multiple filtration through the multilayer filter screens 27, so that the filtering effect of the water can be further improved, so that the fry excrement, bait residues and other impurity particles in the water can be thoroughly removed, and the water quality in the fry tank 3 can be effectively ensured;

the cleaning mechanism comprises a cleaning plate 30, the cleaning plate 30 is positioned in the containing cavity 12, a fixing rod 31 is fixedly connected between the side wall of the cleaning plate 30 and the cavity bottom of the containing cavity 12, a layer of cleaning brush 32 is arranged on the surface of one side, close to the inner wall of the pool body 1, of the cleaning plate 30, the cleaning brush 32 is attached to the surface of the inner wall of the pool body 1, when the fry groove 3 reciprocates up and down, the cleaning plate 30 can be driven to move up and down together, at the moment, the cleaning brush 32 can conduct reciprocating scraping and brushing along the surface of the inner wall of the pool body 1, so that stains adhered to the surface of the inner wall of the pool body 1 can be effectively removed through the cleaning brush 32, and the fry death caused by breeding of various bacteria is avoided;

equal fixedly connected with buffer board 33 in bottom both sides of fry groove 3, buffer board 33 is located support 4 directly over, and its bottom surface evenly is provided with a plurality of buffer block 34, and buffer block 34 is hemisphere rubber block structure, has elasticity, can take place elastic deformation when receiving the extrusion to can play the effect of buffering, with the top direct contact of its bottom and support 4 when effectively preventing fry groove 3 downstream to lowest produces collision and wearing and tearing.

The working principle is as follows: when the invention is used, firstly, the fry to be bred and cultivated is put into the fry groove 3 and is injected with water like the fry groove 3 until the required water quantity requirement is met, the fry can be bred and cultivated through the fry groove 3, the fry groove 3 can move downwards under the action of gravity and compress the spring 6 along with the increasing of the water quantity in the fry groove 3, at the moment, the filter cylinder 13 can pass through the water guide port 7 and extend into the baffle net 8, when the filter cylinder 13 enters the baffle net 8, the water in the fry groove 3 can flow into the filter cylinder 13 through the water guide hole 15, at the moment, the water quantity in the fry groove 3 is gradually reduced, and when the water quantity in the fry groove 3 is reduced, the fry groove 3 can slowly move upwards under the elastic resetting action of the spring 6, the water body is contacted with the filter core 19 after entering the filter cylinder 13, at the moment, the water body entering the filter cylinder 13 can be primarily filtered through the filter core 19 so as to adsorb impurity particles such as partial fry excrement, bait residue and the like in the water body, the water body primarily filtered by the filter element 19 can flow into the water guide pipe 20 through the filter cartridge 13 and enter the return cavity 2 along the water guide pipe 20, the inner diameter of the return cavity 2 is small, the liquid level of the water body rapidly rises after entering the return cavity 2 until entering the return pipe 14, the water body primarily filtered can be guided into the filter tank 22 through the return pipe 14 and flows into the filter rack 26, the inner wall of the filter rack 26 is provided with a plurality of layers of filter screens 27 which are respectively contacted with the filter screens 27 after the water body flows into the filter rack 26, at the moment, the water body can be subjected to multiple filtration through the plurality of layers of filter screens 27, so that the filtering effect of the water body can be further improved, so that the residual impurity particles such as fry excrement, bait residues and the like in the water body can be thoroughly removed, the water quality in the fry tank 3 is effectively ensured, and the water body after multiple filtration flows into the fry tank 3 again through the water permeable holes 25 at the bottom of the filter tank 22, therefore, the water amount in the fry groove 3 is supplemented, the fry groove 3 can reciprocate up and down through the continuous change of the water amount in the fry groove 3, when the fry groove 3 reciprocates up and down, the cleaning plate 30 can be driven to move up and down together, and the cleaning brush 32 can perform reciprocating scraping and brushing along the inner wall surface of the pool body 1, so that stains adhered to the inner wall surface of the pool body 1 can be effectively removed through the cleaning brush 32, and the death of fries caused by various bacteria breeding is avoided; after the breeding pond is used for a long time, the first bolt 10 can be screwed out of the first threaded groove 11 so as to take the blocking net 8 down from the upper part of the water guide opening 7, then the rotary block 17 is rotated to screw the sealing cover 16 out of the top part of the filter cylinder 13, and then the filter element 19 can be taken out, so that the filter element 19 can be cleaned or replaced, meanwhile, the second bolt 23 can be screwed out of the second threaded groove 24 so as to take the mounting plate 21 and the filter groove 22 out of the fry groove 3, and then the filter frame 26 is taken out of the filter groove 22, so that each layer of filter screen 27 in the filter frame 26 can be cleaned or replaced, and therefore, the phenomenon that foreign particles such as fry excrement, bait residues and the like are adhered to the filter element 19 and each layer of filter screen 27 to influence the subsequent water body filtering effect of the breeding pond can be effectively avoided.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a pond is bred to unpowered automatically cleaning fry, includes cell body (1), its characterized in that: set up backward flow chamber (2) in the both sides lateral wall intermediate layer of cell body (1), be provided with fry groove (3) in its pond, just equal fixedly connected with support (4) in the bottom of the pool both sides of cell body (1), support (4) are the n font, and through-hole (5) have all been seted up to its both sides, just the equal a plurality of springs (6) of fixedly connected with in the top both sides of support (4), the top fixed connection of spring (6) is in the bottom of fry groove (3), mouth of leading water (7) have been seted up at the tank bottom center of fry groove (3), mouth of leading water (7) are circular, and its below is provided with backward flow mechanism, just the top of leading water (7) is provided with fender net (8), the equal fixedly connected with installation piece (9) in the both sides bottom of fender net (8), threaded connection has first bolt (10) on installation piece (9), the tank bottom surface in fry groove (3) is seted up with first bolt (10) matched with first thread groove (10), (3) 11) The fry groove is characterized in that filtering mechanisms are arranged on two sides of an inner cavity of the fry groove (3), storage cavities (12) are formed in the surfaces of outer walls of two sides of the fry groove, and cleaning mechanisms are arranged in the storage cavities (12).

2. The unpowered self-cleaning fry rearing pond according to claim 1, wherein: the backflow mechanism comprises a filter cartridge (13) and a backflow pipe (14), the filter cartridge (13) is located below the water guide port (7), water guide holes (15) are formed in the walls of two sides of the filter cartridge, a sealing cover (16) is arranged at the top of the filter cartridge (13), a rotary block (17) is fixedly connected to the top of the sealing cover (16), a convex block (18) is fixedly connected to the bottom of the sealing cover, the cross section of the convex block (18) is circular, external threads are formed in the surface of the side wall of the convex block, internal threads matched with the convex block (18) are carved on the surface of the inner wall of the top end of the filter cartridge (13), a filter element (19) is installed at the bottom of the convex block (18), a water guide pipe (20) is fixedly connected to the bottom of the filter cartridge (13), the water guide pipe (20) is communicated with the inner cavity of the filter cartridge (13), and the two ends of the water guide pipe (20) penetrate through holes (5) on two sides of the support (4), and the orifices at the two ends of the water guide pipe (20) penetrate through the inner wall of the pool body (1) and are communicated with the backflow cavity (2), the backflow pipe (14) is fixedly connected to the two sides of the top of the pool body (1), the orifice at one end of the backflow pipe is communicated with the backflow cavity (2), and the orifice at the tail end of the backflow pipe (14) extends to the upper part of the fry groove (3).

3. The unpowered self-cleaning fry rearing pond according to claim 2, wherein: the outer diameter of the filter cartridge (13) is equal to the diameter of the water guide opening (7), the centers of the filter cartridge (13) and the water guide opening (7) are located on the same straight line, the side wall of the rotary block (17) is arc-shaped and is inwards sunken, and herringbone anti-skidding lines are carved on the surface of the side wall of the rotary block (17).

4. The unpowered self-cleaning fry rearing pond according to claim 1, wherein: the filtering mechanism comprises a mounting plate (21), a filtering tank (22) is fixedly connected to the side wall of the mounting plate (21), a second bolt (23) is connected to the two ends of the filtering tank in a threaded mode, a second threaded groove (24) matched with the second bolt (23) is formed in the surface of the inner wall of the fry groove (3), the filtering tank (22) is located under the end orifice of a return pipe (14), a water permeable hole (25) is formed in the bottom of the filtering tank, a filtering frame (26) is arranged in the filtering tank (22), the filtering frame (26) is U-shaped, and a plurality of layers of filtering nets (27) are arranged on the inner wall of the filtering tank.

5. The unpowered self-cleaning fry rearing pond according to claim 4, wherein: the both sides top of filter frame (26) all outwards is outstanding, its outstanding department bottom fixedly connected with fixture block (28), draw-in groove (29) with fixture block (28) matched with are all seted up to the both sides top surface of rose tank (22), draw-in groove (29) are located same straight line with the center of fixture block (28), filter screen (27) are the equidistance setting, and its mesh number is according to from last down order crescent.

6. The unpowered self-cleaning fry rearing pond according to claim 1, wherein: clean mechanism is including cleaning plate (30), cleaning plate (30) are located and accomodate chamber (12), fixedly connected with dead lever (31) between its lateral wall and the chamber end of accomodating chamber (12), just one side surface that cleaning plate (30) are close to cell body (1) inner wall is provided with one deck cleaning brush (32), the inner wall surface of cell body (1) is laminated in cleaning brush (32).

7. The unpowered self-cleaning fry rearing pond according to claim 1, wherein: equal fixedly connected with buffer board (33) in bottom both sides of fry groove (3), buffer board (33) are located support (4) directly over, and its bottom surface evenly is provided with a plurality of buffer block (34), buffer block (34) are hemisphere rubber block structure.