CN223055201U - Novel aquaculture water filters device - Google Patents

Abstract

The utility model relates to the technical field of filtering devices, specifically a novel aquaculture water filtering device, comprising a treatment box, a rotatable filtering mechanism arranged in the treatment box, the rotatable filtering mechanism comprising a rotating filtering barrel, a U-shaped frame arranged on the upper side of the treatment box, a cleaning and scraping mechanism connected to a sewage inlet pipe and an outer wall of a fixed column and slidingly matched with an inner wall of the rotating filtering barrel, a booster pump arranged on the lower side of the treatment box and arranged at intervals with the blocking mechanism, a branch pipe connected to a water outlet end of the booster pump, and an inclined nozzle connected to one end of the outer wall of the branch pipe and acting on the inner wall of the rotating filtering barrel; the device is convenient for scraping and flushing dirt and impurities adhered to the inner wall of the filter screen cylinder, thereby improving the filtering efficiency of the filter screen cylinder; and the device is convenient for controlling the blocking and opening of the lower end opening of the rotating filtering barrel, thereby solving the problem that part of the water discharged during the filtering process of the existing device needs secondary filtering treatment and manual cleaning of the filter screen plate in the collection box.

Description

Novel aquaculture water filters device

Technical Field

The utility model relates to the technical field of filtering devices, in particular to a novel aquaculture water filtering device.

Background

Aquaculture refers to the production process of aquatic products that are subject to artificial intervention for growth, development, reproduction, etc., and are harvested periodically. In order to ensure the normal survival of aquatic products, the aquatic products need to be filtered, so that the situation that the aquatic products die due to pollution of sewage impurities in water to the water is reduced.

At present, the main mode of filtering the culture water body is to pump and convey water in the culture pond into a filter screen barrel by using a sludge pump, the water is filtered under the action of the filter screen barrel, and the filtered water flows back into the culture pond again.

The existing aquaculture water body filtering device has the following problems:

1. When the pollutant impurities attached to the inner wall of the filter screen cylinder are cleaned, the filter screen cylinder is driven to rotate, and the filter screen cylinder is cleaned in a back flushing mode, however, the inner wall of the filter screen cylinder is still adhered with part of the pollutant impurities, so that the filtering efficiency of the filter screen cylinder is easily influenced;

2. When the filter screen cylinder filters the entering aquaculture water, partial water enters the collecting box below along with filtered dirt and impurities, secondary filtering treatment is needed, the filter screen plate is easy to block in the secondary treatment process, and manual cleaning of the secondary filter screen plate is needed.

Disclosure of utility model

The utility model aims to provide a novel aquaculture water body filtering device which is used for solving the problems that dirt impurities adhered to the inner wall of a filter screen cylinder are inconvenient to scrape, wash and clean and influence the filtering efficiency when aquaculture water is filtered at present, and the outlet at the lower end of the filter screen cylinder is inconvenient to block and open in the filtering process of the filter screen cylinder, so that secondary filtering treatment is needed.

The novel aquaculture water filtering device comprises a treatment tank, a rotatable filtering mechanism arranged in the treatment tank, a water pump arranged above the rotatable filtering mechanism, a sewage inlet pipe connected with the water outlet end of the water pump, and a plugging mechanism arranged at the lower side of the treatment tank, wherein the rotatable filtering mechanism comprises a rotary filtering barrel, a U-shaped frame arranged at the upper side of the treatment tank, an L-shaped frame arranged at the lower side of the treatment tank, a fixed column connected with the bottom end of the inner wall of the L-shaped frame, one end of the fixed column extends into the rotary filtering barrel, a cleaning scraping mechanism connected with the outer wall of the sewage inlet pipe and the fixed column and in sliding fit with the inner wall of the rotary filtering barrel, a rotary driving mechanism in transmission fit with the rotary filtering barrel and connected with the U-shaped frame, a booster pump arranged at intervals with the lower side of the booster pump, a branch pipe communicated with the water outlet end of the booster pump, an inclined nozzle communicated with one end of the outer wall of the branch pipe and acting on the inner wall of the rotary filtering barrel, a fixed pipe connected with the sewage inlet pipe, and a rotary filtering barrel arranged at one end of the other end of the rotary filtering barrel, a rotary filtering barrel penetrating through the L-shaped frame and extending to the inner side of the rotary filtering barrel, a rotary filtering barrel sequentially, a cleaning scraping mechanism connected with the inner wall of the rotary filtering barrel and the rotary filtering barrel is arranged at one end of the rotary filtering barrel and the rotary filtering frame and the rotary filtering barrel.

Further, the outer wall of the sewage inlet pipe is provided with a ring plate, the rotary filter barrel comprises a filter screen barrel, an upper rotary barrel, a lower rotary barrel and an annular chute, the filter screen barrel is positioned in the treatment box, the lower end of the filter screen barrel is in a conical bucket shape, the upper rotary barrel and the lower rotary barrel are respectively communicated with the upper end and the lower end of the filter screen barrel, the annular chute is arranged in an opening at the upper side of the upper rotary barrel, the ring plate is positioned in the annular chute and is in sliding fit with the annular chute, the lower rotary barrel and the upper rotary barrel are both in rotary connection with the treatment box, and one end of each of the lower rotary barrel and the upper rotary barrel extends to the outer side of the treatment box.

Further, the cleaning scraping mechanism comprises elastic pieces connected with the sewage inlet pipe and the outer wall of the fixed column respectively, a connecting plate connected with one end of the two elastic pieces, and a rubber scraping plate connected with one side of the connecting plate and in sliding fit with the inner wall of the filter screen cylinder.

Further, the elastic piece comprises an outer cylinder, an inner column which is in sliding fit with the outer cylinder and one end of which extends to one end of the outer cylinder, and a spring which is sleeved outside the outer cylinder and the inner column, wherein two ends of the spring are respectively connected with one side of the connecting plate and the outer wall of the fixed column or the sewage inlet pipe, one end of the inner column is connected with one side of the connecting plate, and one end of the outer cylinder is connected with the outer wall of the fixed column or the sewage inlet pipe.

Further, a circular opening and a circular plugging opening are sequentially formed in the lower side of the lower rotary cylinder from top to bottom, a limiting ring positioned in the circular opening is fixedly connected to the outer wall of the fixing column, an annular drain outlet is formed between the circular opening and the limiting ring, and the plugging mechanism comprises electric push rods arranged on the lower side of the treatment box and respectively positioned on the two sides of the lower rotary cylinder, L-shaped plates respectively connected with the output ends of the two electric push rods, and annular plugging plates connected with the upper sides of the two L-shaped plates and matched with the annular drain outlet, and the annular plugging plates are sleeved with the outer wall of the fixing column in a sliding fit manner.

Further, the rotary driving mechanism comprises a motor arranged on the upper side of the U-shaped frame and arranged at intervals with the water pump, a rotating shaft connected with the output end of the motor, a first gear arranged on the outer wall of the rotating shaft, and a second gear arranged on the outer wall of the upper rotary drum, wherein the first gear and the second gear are in meshed connection, and the rotating shaft is rotationally connected between the inner wall of the U-shaped frame and the upper side of the treatment box.

Further, a back flushing mechanism is arranged on the inner wall of the treatment box, and the back flushing mechanism acts on the filter screen cylinder.

Further, the back flushing mechanism comprises a water pipe communicated with the outer wall of the branch pipe, and a plurality of spray heads which are arranged on the wall of the water pipe and are arrayed along the length direction of the water pipe, and the spray heads are all positioned in the treatment box.

Further, the lower side of the treatment box is communicated with a drain pipe which is arranged at intervals with the plugging mechanism and the outer wall of which is provided with a valve.

Further, the inner walls of the L-shaped frames corresponding to the round openings are distributed obliquely downwards.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model has the following beneficial effects:

1. When the filter screen cylinder of the rotary filter screen cylinder is cleaned, the rotary filter screen cylinder is driven to rotate by the rotary driving mechanism, the cleaning scraping mechanism connected with the sewage inlet pipe and the fixed column in the rotating process scrapes dirt impurities adhered to the inner wall of the rotary filter screen cylinder, the controller controls the booster pump to be started, water in the treatment box is pumped into the branch pipe, and then the water is sprayed out by the inclined spray nozzle to further flush and separate the dirt impurities adhered to the inner wall of the rotary filter screen cylinder, so that the dirt impurities adhered to the inner wall of the filter screen cylinder are scraped, flushed and cleaned, and the filtering efficiency of the filter screen cylinder is improved;

2. When filtering the aquaculture water and handling, with rotatory filter vat lower extreme export shutoff through shutoff mechanism, when discharging the filth impurity after will filtering, control shutoff mechanism opens rotatory filter vat lower extreme export, filters the filth impurity discharge of collecting in the rotatory filter vat, and then the device conveniently controls rotatory filter vat lower extreme open-ended shutoff and opens, has solved the problem that partial water discharge needs secondary filtration to handle and need manual filter screen board clearance in the collecting box of current device filtration process.

Drawings

FIG. 1 is a schematic diagram of a novel aquaculture water filter according to the present utility model;

FIG. 2 is a schematic cross-sectional view of the novel aquaculture water filter according to the present utility model;

FIG. 3 is an enlarged schematic view of FIG. 2A in accordance with the present utility model;

FIG. 4 is a control block diagram of the novel aquaculture water filter system of the present utility model.

The device comprises a treatment box 1, a rotatable filtering mechanism 2, a cleaning scraping mechanism 3, a4, a drain pipe, a 5, a plugging mechanism 6, a water pump 7, a sewage inlet pipe 8, a U-shaped frame 9, an L-shaped frame 10, a fixed column 11, a limiting ring 12, an elastic piece 13, a connecting plate 14, a rubber scraper 15, an outer cylinder 16, an inner column 17, a spring 18, a filter screen cylinder 19, an upper rotary cylinder 20, a lower rotary cylinder 21, a round opening 22, a round plugging port 23, an annular chute 24, a ring plate 25, an electric push rod 26, an L-shaped plate 27, an annular plugging plate 28, a booster pump 29, a water pipe 30, a spray head 31, a motor 32, a rotary shaft 33, a first gear 34, a second gear 35, a branch pipe 36, an inclined spray head 37 and a fixed pipe fitting.

Detailed Description

Referring to fig. 1-4, a novel aquaculture water filtering device comprises a treatment box 1, a rotatable filtering mechanism 2 arranged in the treatment box 1, a water pump 6 positioned above the rotatable filtering mechanism 2, a sewage inlet pipe 7 connected with the water outlet end of the water pump 6, and a plugging mechanism 5 arranged at the lower side of the treatment box 1; the treatment tank 1 is provided with an observable transparent window on one side, which is convenient for observing the collection amount of dirt and impurities in the rotatable filter mechanism 2 and discharging the dirt and impurities in time, the rotatable filter mechanism 2 comprises a rotary filter tank, a U-shaped frame 8 connected to the upper side of the treatment tank 1, an L-shaped frame 9 connected to the lower side of the treatment tank 1, a fixed column 10 connected to the bottom end of the inner wall of the L-shaped frame 9 and one end of which extends into the rotary filter tank, a cleaning scraping mechanism 3 connected to the outer wall of the sewage inlet pipe 7 and the fixed column 10 and in sliding fit with the inner wall of the rotary filter tank, a rotary driving mechanism in driving fit with the rotary filter tank and connected with the U-shaped frame 8, a booster pump 28 arranged at a distance from the lower side of the treatment tank 1 and connected with the plugging mechanism 5, a branch pipe 35 connected with the water outlet end of the booster pump 28, a tilt nozzle 36 connected with one end of the outer wall of the branch pipe 35 and acting on the inner wall of the rotary filter tank, a fixed pipe 37 connected with the branch pipe 35 and the sewage inlet pipe 7, one end of the branch pipe 35 sequentially penetrates through the L-shaped frame 9 and the fixed column 10 and extends into the rotary filter tank, the rotary filter tank 7, a rotary filter mechanism is arranged between the rotary filter tank 1 and the rotary filter tank and the U-shaped frame 8 and the upper end of the rotary filter tank 8 is connected with the upper end of the rotary filter tank 8 in turn and the rotary filter tank at the upper end of the plugging mechanism 8 in turn, and the rotary filter tank is connected with the upper end of the filter tank 8 and the rotary filter tank is connected with the end of the filter tank in turn, the plugging mechanism 5 is in sliding fit with the fixed column 10, when the filter screen barrel 18 of the rotary filter barrel is cleaned, the rotary filter barrel is driven to rotate through the rotary driving mechanism, the cleaning scraping mechanism 3 connected with the sewage inlet pipe 7 and the fixed column 10 in the rotary process scrapes dirt impurities adhered to the inner wall of the rotary filter screen barrel 18, the controller controls the booster pump 28 to be opened, water in the treatment tank 1 is pumped into the branch pipe 35, then the water is sprayed out through the inclined spray nozzle 36, the dirt impurities adhered to the inner wall of the rotary filter barrel are further washed and separated, further the dirt impurities adhered to the inner wall of the filter screen barrel 18 are scraped, washing and cleaning are facilitated, the filtering efficiency of the filter screen barrel 18 is improved, when filtered water is filtered, the outlet at the lower end of the rotary filter barrel is plugged through the plugging mechanism 5, and when filtered dirt impurities are discharged, the outlet at the lower end of the rotary filter barrel is controlled to be opened, the dirt impurities filtered and collected in the rotary filter barrel are conveniently controlled to be opened, and the problem that the water discharge needs secondary filtering treatment and manual cleaning of the filter screen plate in the filtering process of the traditional device is solved.

The outer wall of the sewage inlet pipe 7 is provided with a ring plate 24, the rotary filter barrel comprises a filter screen barrel 18 which is positioned in the treatment box 1 and the lower end of which is in a conical hopper shape, an upper rotary barrel 19 and a lower rotary barrel 20 which are respectively communicated with the upper end and the lower end of the filter screen barrel 18, and an annular chute 23 which is arranged in an opening at the upper side of the upper rotary barrel 19, wherein the ring plate 24 is positioned in the annular chute 23 and is in sliding fit with the annular chute 23, the lower rotary barrel 20 and the upper rotary barrel 19 are both in rotary connection with the treatment box 1, and one end of the lower rotary barrel 19 extends to the outer side of the treatment box 1, and the lower end of the filter screen barrel 18 is in a conical hopper shape so as to facilitate the discharge of dirt impurities collected in the filter screen barrel 18.

The cleaning and scraping mechanism 3 comprises elastic pieces 12 connected with the sewage inlet pipe 7 and the outer wall of the fixed column 10 respectively, a connecting plate 13 connected with one ends of the two elastic pieces 12, and a rubber scraper 14 connected with one side of the connecting plate 13 and in sliding fit with the inner wall of the filter screen barrel 18, wherein the rubber scraper 14 connected with the connecting plate 13 cleans and scrapes dirt and impurities adhered to the inner wall of the filter screen barrel 18 in the rotating process of the filter screen barrel 18.

The elastic piece 12 comprises an outer cylinder 15, an inner column 16 which is slidably matched in the outer cylinder 15 and one end of which extends to one end of the outer cylinder 15, and a spring 17 which is sleeved outside the outer cylinder 15 and the inner column 16, wherein two ends of the spring 17 are respectively connected with one side of the connecting plate 13 and the outer wall of the fixed column 10 or the sewage inlet pipe 7, one end of the inner column 16 is connected with one side of the connecting plate 13, one end of the outer cylinder 15 is connected with the outer wall of the fixed column 10 or the sewage inlet pipe 7, and the rubber scraping plate 14 is driven to be always attached to the inner wall of the filter screen cylinder 18 through the matching of the spring 17, the inner column 16 and the outer cylinder 15.

The lower side of the lower rotary cylinder 20 is sequentially provided with a circular opening 21 and a circular blocking opening 22 from top to bottom, the outer wall of the fixed column 10 is fixedly connected with a limiting ring 11 positioned in the circular opening 21, an annular drain outlet is formed between the circular opening 21 and the limiting ring 11, the blocking mechanism 5 comprises electric push rods 25 which are arranged on the lower side of the treatment box 1 and are respectively positioned on two sides of the lower rotary cylinder 20, L-shaped plates 26 which are respectively connected with the output ends of the two electric push rods 25, annular blocking plates 27 which are connected with the upper sides of the two L-shaped plates 26 and are matched with the annular drain outlet, the annular blocking plates 27 are sleeved with the outer wall of the fixed column 10 and are in sliding fit, the inner diameter of each annular blocking plate 27 is slightly larger than the diameter of the fixed column 10, a sealing structure is arranged between each annular blocking plate 27 and the circular blocking opening 22 and the limiting ring 11, a sealing ring or a sealing gasket is adopted, when the dirt impurities filtered and collected in the filter screen cylinder 18 are required to be discharged, the two electric push rods 25 are opened, the two L-shaped plates 26 drive the annular blocking plates 27 to descend, the dirt filtered and collected in the filter screen 18 to be discharged through the annular drain outlet, and the dirt collected in the filter screen 18 is conveniently opened to the lower end of the lower rotary cylinder 20.

The rotary driving mechanism comprises a motor 31, a rotating shaft 32, a first gear 33 and a second gear 34, wherein the motor 31 is arranged on the upper side of the U-shaped frame 8 and is arranged at intervals with the water pump 6, the rotating shaft 32 is connected with the output end of the motor 31, the first gear 33 is arranged on the outer wall of the rotating shaft 32, the second gear 34 is arranged on the outer wall of the upper rotary drum 19, the first gear 33 is meshed with the second gear 34, the rotating shaft 32 is rotatably connected between the inner wall of the U-shaped frame 8 and the upper side of the treatment box 1, the motor 31 is started to drive the rotating shaft 32 to rotate, the first gear 33 is driven to rotate the second gear 34, the upper rotary drum 19 is driven to rotate, the filter screen drum 18 is synchronously driven to rotate, and the filter screen drum 18 is conveniently driven to rotate.

The inner wall of the treatment box 1 is provided with a back flushing mechanism, the back flushing mechanism acts on the filter screen cylinder 18, the back flushing mechanism comprises a water pipe 29 communicated with the outer wall of a branch pipe 35 and a plurality of spray heads 30 arranged on the wall of the water pipe 29 in an array mode along the length direction of the water pipe 29, the spray heads 30 are all positioned in the treatment box 1, water in the branch pipe 35 enters the water pipe 29 and is sprayed out through the spray heads 30, and back flushing is conducted on the filter screen cylinder 18 in the rotating process.

The lower side of the treatment box 1 is communicated with a drain pipe 4 which is arranged at intervals with the plugging mechanism 5 and is provided with a valve on the outer wall, and the water filtered in the treatment box 1 is circularly discharged into the culture pond through the drain pipe 4.

The inner walls of the L-shaped frames 9 corresponding to the circular openings 21 are arranged obliquely downwards, and dirt and impurities falling onto the L-shaped frames 9 can slide down conveniently through the obliquely downwards arrangement of the inner walls of the L-shaped frames 9 corresponding to the circular openings 21.

One side of the treatment box 1 is provided with a controller which is electrically connected with the booster pump 28, the motor 31, the water pump 6 and the electric push rod 25.

The working principle is that when water in the culture pond is treated, a sewage pipe connected with a water pump 6 is connected with the sewage pond, a controller controls the water pump 6 to be started, water in the sewage pond enters a filter screen cylinder 18 through a sewage inlet pipe 7, dirt impurities in the water are filtered and collected through a rotary screen cylinder 18, and filtered water is circularly discharged into the culture pond through a drain pipe 4; when the filter screen cylinder 18 is cleaned, the motor 31 and the booster pump 28 are controlled by the controller to be started, the motor 31 drives the rotating shaft 32 to rotate, the first gear 33 drives the second gear 34 to rotate, the upper rotating cylinder 19 is driven to rotate, the filter screen cylinder 18 is synchronously driven to rotate, the rubber scraping plates 14 connected with the connecting plates 13 in the rotating process are contacted with each other, dirt and impurities adhered to the inner wall of the filter screen cylinder 18 are cleaned and scraped off, the water in the treatment box 1 is pumped into the branch pipes 35 by the booster pump 28, then sprayed out by the inclined spray heads 36, the dirt and impurities adhered to the inner wall of the rotating filter screen cylinder are further washed and separated, the dirt and impurities adhered to the inner wall of the filter screen cylinder 18 are conveniently scraped off and cleaned, the filtering efficiency of the filter screen cylinder 18 is improved, meanwhile, water in the branch pipes 35 enters into the water pipe 29 and is sprayed out by the spray heads 30, the filter screen cylinder 18 in the rotating process is synchronously driven to be cleaned, when the filtered water is treated, the filtered through the plugging mechanism 5, the dirt and impurities adhered to the inner wall of the filter screen cylinder 18 are cleaned, the two electric push rods 25 are started, the two L26 drive the annular plates 27 to descend, the annular sealing plates 27 and the dirt and impurities in the filter screen cylinder 18 are conveniently discharged out through the plugging opening of the annular sealing plate, the sealing device is conveniently opened, the problem of current device filtration in-process partial water discharge need secondary filtration treatment, need manual to the filter screen board clearance in the collecting box is solved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (10)

1. The novel aquaculture water filtering device comprises a treatment box (1), a rotatable filtering mechanism (2) arranged in the treatment box (1), a water pump (6) arranged above the rotatable filtering mechanism (2), a sewage inlet pipe (7) connected with the water outlet end of the water pump (6), and is characterized by further comprising a plugging mechanism (5) arranged at the lower side of the treatment box (1), wherein the rotatable filtering mechanism (2) comprises a rotary filtering barrel, a U-shaped frame (8) arranged at the upper side of the treatment box (1), an L-shaped frame (9) arranged at the lower side of the treatment box (1), a fixed column (10) connected with the inner wall bottom end of the L-shaped frame (9) and one end of which extends into the rotary filtering barrel, a cleaning scraping mechanism (3) connected with the outer wall of the sewage inlet pipe (7) and the fixed column (10) and in sliding fit with the inner wall of the rotary filtering barrel, a rotary driving mechanism matched with the rotary filtering barrel and connected with the U-shaped frame (8), a booster pump (28) arranged at the lower side of the treatment box (1) and spaced from the plugging mechanism (5), a water outlet pipe (35) connected with the outer wall (35) of the rotary filtering pipe (35), a rotary nozzle (35) connected with the rotary nozzle (35) and a rotary nozzle (37) connected with the rotary nozzle, the utility model discloses a sewage treatment device, including rotatory filter vat, fixed column (10), rotatory filter vat, water pump (6), U type frame (8) upside is established in rotatory nozzle (36), the one end of branch pipe (35) runs through L type frame (9) and fixed column (10) in proper order and extends to the inside of rotatory filter vat, rotatory filter vat is connected with the rotation of processing case (1) and both ends extend to the outside of processing case (1), just rotatory filter vat is connected with the rotation between sewage intake tube (7), one end of sewage intake tube (7) runs through U type frame (8) in proper order and extends to the inside of rotatory filter vat, shutoff mechanism (5) can rotatory filter vat lower extreme export shutoff, just shutoff mechanism (5) and fixed column (10) sliding fit.

2. The novel aquaculture water filtering device according to claim 1, wherein the outer wall of the sewage inlet pipe (7) is provided with a ring plate (24), the rotary filtering barrel comprises a filtering net barrel (18) which is arranged in the treatment box (1) and the lower end of which is in a conical bucket shape, an upper rotary barrel (19) and a lower rotary barrel (20) which are respectively communicated with the upper end and the lower end of the filtering net barrel (18), an annular chute (23) which is arranged in an upper opening of the upper rotary barrel (19), the ring plate (24) is arranged in the annular chute (23) and is in sliding fit with the annular chute (23), and the lower rotary barrel (20) and the upper rotary barrel (19) are both connected with the treatment box (1) in a rotating way, and one end of each of the lower rotary barrels (19) extends to the outer side of the treatment box (1).

3. A novel aquaculture water body filtering device according to claim 2, characterized in that the cleaning scraping mechanism (3) comprises elastic pieces (12) connected with the sewage inlet pipe (7) and the outer wall of the fixed column (10), a connecting plate (13) connected with one end of the two elastic pieces (12), and a rubber scraping plate (14) connected with one side of the connecting plate (13) and in sliding fit with the inner wall of the filter screen cylinder (18).

4. A novel aquaculture water filtering device according to claim 3, characterized in that the elastic member (12) comprises an outer cylinder (15), an inner column (16) which is slidably fitted in the outer cylinder (15) and one end of which extends to one end of the outer cylinder (15), and a spring (17) which is sleeved outside the outer cylinder (15) and the inner column (16), wherein two ends of the spring (17) are respectively connected with one side of the connecting plate (13) and the outer wall of the fixed column (10) or the sewage inlet pipe (7), one end of the inner column (16) is connected with one side of the connecting plate (13), and one end of the outer cylinder (15) is connected with the outer wall of the fixed column (10) or the sewage inlet pipe (7).

5. The novel aquaculture water filtering device according to claim 2, wherein the lower side of the lower rotary drum (20) is sequentially provided with a circular opening (21) and a circular plugging opening (22) from top to bottom, the outer wall of the fixed column (10) is fixedly connected with a limiting ring (11) positioned in the circular opening (21), an annular sewage outlet is formed between the circular opening (21) and the limiting ring (11), the plugging mechanism (5) comprises electric pushing rods (25) which are arranged on the lower side of the treatment box (1) and are respectively positioned on two sides of the lower rotary drum (20), L-shaped plates (26) which are respectively connected with the output ends of the two electric pushing rods (25), and annular plugging plates (27) which are connected with the upper sides of the two L-shaped plates (26) and are matched with the annular sewage outlet, and the annular plugging plates (27) are sleeved with the outer wall of the fixed column (10) in a sliding fit.

6. The novel aquaculture water filtering device according to claim 2, wherein the rotary driving mechanism comprises a motor (31) arranged on the upper side of the U-shaped frame (8) and spaced from the water pump (6), a rotating shaft (32) connected with the output end of the motor (31), a first gear (33) arranged on the outer wall of the rotating shaft (32), and a second gear (34) arranged on the outer wall of the upper rotary drum (19), the first gear (33) and the second gear (34) are in meshed connection, and the rotating shaft (32) is rotatably connected between the inner wall of the U-shaped frame (8) and the upper side of the treatment box (1).

7. A novel aquaculture water filter according to claim 2, characterized in that the inner wall of the treatment tank (1) is provided with a back flushing mechanism which acts on the filter cartridge (18).

8. A novel aquaculture water filtering device according to claim 7, characterized in that the back flushing mechanism comprises a water pipe (29) communicated with the outer wall of the branch pipe (35), and a plurality of spray heads (30) arranged on the wall of the water pipe (29) and arrayed along the length direction of the water pipe (29), wherein a plurality of spray heads (30) are all positioned inside the treatment tank (1).

9. A novel aquaculture water filtering device according to claim 1, characterized in that the underside of the treatment box (1) is communicated with a drain pipe (4) which is arranged at intervals with the plugging mechanism (5) and is provided with a valve on the outer wall.

10. A novel aquaculture water filter according to claim 1, characterized in that the inner walls of the L-shaped frames (9) corresponding to the circular openings (21) are arranged obliquely downwards.