A filtering device for zebrafish breeding

Abstract

The invention discloses a filtering device for zebrafish breeding, which belongs to the technical field of zebrafish breeding. The invention comprises a filter tube, wherein a filter assembly is arranged inside the filter tube, and the filter assembly comprises a rotating frame rotatably installed inside the filter tube, the rotating frame is in a "Y"-shaped structure, and a filter plate for filtering water is slidably installed inside a vacant part around the rotating frame, a piston groove is provided at a position of the inner wall of the filter tube corresponding to the filter plate, a push rod is slidably installed inside the piston groove, and a collecting box is arranged on the lower side of the rotating frame. The invention can filter impurities in the water through the arranged filter assembly, and when impurities are continuously accumulated at the lower end of one of the filter plates, the rotating frame and the filter plate can be rotated under the action of the push rod, so that the other filter plate is rotated to the working position, so that the new filter plate is used to filter the water, so that the filtering device can work continuously, and it can avoid the need for staff to frequently replace the filter screen or the filter element.

Description

Technical Field

[0001] The invention relates to the technical field of zebrafish breeding, and more particularly to a filtering device for zebrafish breeding. Background Art

[0002] In addition to being an ornamental fish, zebrafish is also a model organism used in research fields such as medicine and pharmacy, and has a wide range of scientific applications. Zebrafish used for scientific purposes have higher quality requirements for water.

[0003] Therefore, in the process of zebrafish breeding, it is necessary to filter the water in the breeding container to remove the remaining feed or zebrafish excrement and impurities in the water to avoid affecting the water quality and causing the zebrafish to become sick. When filtering the water, the filter screen inside the filtering device blocks the impurities, and the impurities will accumulate on the surface of the filter screen. At this time, the staff needs to frequently replace the filter screen or filter element. The traditional filtering device can no longer automatically replace the filter screen when filtering the water, so that the filter screen remains clean, thereby ensuring that the filtering device can continue to work. Therefore, the present invention discloses a filtering device for zebrafish breeding. Summary of the invention

[0004] In view of the problems existing in the prior art, the object of the present invention is to provide a filtering device for zebrafish breeding.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A filtering device for zebrafish breeding, comprising a filtering tube, wherein a filtering assembly is arranged inside the filtering tube, wherein the filtering assembly comprises a rotating frame rotatably mounted inside the filtering tube, wherein the rotating frame is in a "Y"-shaped structure, and a filtering plate for filtering water is slidably mounted inside a vacant portion around the rotating frame;

[0007] A piston groove is provided at a position of the inner wall of the filter tube corresponding to the filter plate, and a push rod for pushing the filter plate and the rotating frame to rotate is slidably installed inside the piston groove. Both the piston groove and the push rod are arc-shaped structures, and the push rod is slidably connected to the piston groove;

[0008] A collecting box for collecting filtered materials is provided at the lower side of the rotating frame, the upper end of the collecting box is fitted with the lower end of the rotating frame, the collecting box corresponds to the position of one of the filter plates, and the collecting box is fixedly installed inside the filter tube, and the collecting box blocks the lower end of the unused filter plate.

[0009] Furthermore, a guide groove is provided at a position corresponding to the filter plate on the inner wall of the filter tube, and the guide groove consists of a first horizontal arc groove, a second horizontal arc groove and two vertical grooves, and both ends of the vertical groove are respectively connected to the first horizontal arc groove and the second horizontal arc groove.

[0010] Furthermore, a ball is embedded in a position of the filter plate corresponding to the guide groove, the push rod pushes the ball, and a compression spring is fixedly installed on the upper end of the filter plate, and the compression spring squeezes the filter plate.

[0011] Furthermore, a cavity is provided inside the rotating frame, a piston plate is slidably installed inside the cavity, a first water inlet is provided at a position corresponding to the cavity at the upper end of the rotating frame, and the piston plate sucks water inside the filter tube into the upper side of the cavity when it descends in the cavity, a connecting pipe is rotatably connected to the lower side of the rotating frame, one end of the connecting pipe is connected to the lower side of the cavity, and the other end of the connecting pipe is connected to the inside of the piston groove.

[0012] Furthermore, a plurality of pull ropes are fixedly mounted on the lower end of the piston plate, the number of the pull ropes is the same as the number of the filter plates, and one end of the pull rope away from the piston plate passes through the inner wall of the cavity, extends to the outside thereof and is fixedly connected to the filter plate.

[0013] Furthermore, a support spring is fixedly mounted on the lower end of the piston plate, and the support spring presses the piston plate.

[0014] Furthermore, a cover plate is fixedly installed inside the filter tube, the lower end of the cover plate is fitted with the upper end of the rotating frame, the rotating frame and the cover plate are rotatably connected, a second water inlet is opened at a position of the cover plate corresponding to the first water inlet, and a one-way valve is installed inside the second water inlet, the interior of the side of the cover plate corresponding to the collecting box is hollow, and the lower end of the hollow part of the cover plate is a filter mesh structure, and the hollow part of the cover plate is connected to the interior of the second water inlet.

[0015] Furthermore, a baffle is fixedly installed on the upper side of the interior of the collection box, the baffle is in a filter mesh structure, and is arranged in an inclined state inside the collection box, and there is a gap between the end of the baffle close to the filter tube and the inner wall of the filter tube, and a door panel is installed at a position corresponding to the filter tube and the collection box, and the door panel is in a filter mesh structure. Two water outlets are opened at the upper end of the filter tube, and the two water outlets are in opposite directions, one of the water outlets is connected to the inside of the breeding container, and the other water outlet is connected to the outside of the breeding container, and electronic valves are installed inside the two water outlets, and a submersible pump is installed at the lower end of the filter tube.

[0016] Furthermore, a recorder is slidably provided at the upper end of the position where one of the vertical grooves is connected to the first horizontal arc groove, and the recorder blocks the end of the push rod, and the recorder count increases when the ball squeezes the lower end of the recorder. A calculation module and a control module are installed on the outer wall of the filter tube, and the control module controls the opening and closing of the electronic valve, and the control module controls the working time of the submersible pump;

[0017] Recorder: transmits the recorded data to the computing module;

[0018] Calculation module: After receiving the data from the recorder, it uses the following formula to determine whether the impurities in the water exceed the standard:

[0019] ;

[0020] Among them, Q is the frequency of the filter plate contacting the recorder, n is the number of times the recorder records, and t is the basic working time of the submersible pump. When Q is greater than the preset frequency, the control module controls the electronic valve in the water outlet connected to the outside of the breeding container to open, and at the same time controls the electronic valve in the water outlet connected to the inside of the breeding container to close, so that water is discharged from the breeding container. When Q is less than the preset frequency, the control module controls the opening and closing states of the two electronic valves to be reversed.

[0021] Furthermore, a flow rate detector is installed on the upper side of the filter tube. The flow rate detector transmits monitoring data to the calculation module, which calculates the average water flow velocity. The calculation module transmits the calculated average water flow velocity to the control module. An evaluation module is also provided outside the filter tube. When the frequency of the filter plate contacting the recorder is greater than or less than the preset frequency, the data is transmitted to the control module. The control module controls the total working time of the submersible pump through the following formula:

[0022] When Q is less than the preset frequency: ;

[0023] When Q is greater than the preset frequency: ;

[0024] Among them, T is the total working time of the submersible pump, t is the basic working time of the submersible pump, V is the water volume in the breeding container, D is the diameter of the filter tube, and S is the average speed of water in the filter tube. When the total working time of the submersible pump reaches the specified time, the control module controls the submersible pump to stop working. When the submersible pump stops working, the control module controls the electronic valve in the water outlet connected to the breeding container to open, and controls another electronic valve to close.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention can filter impurities in water through the filter assembly, and when the impurities continue to accumulate at the lower end of one of the filter plates, the rotating frame and the filter plate can be rotated under the action of the push rod, so that the other filter plate can be rotated to the working position, so that the new filter plate can be used to filter the water, so that the filtering equipment can work continuously and the need for staff to frequently replace the filter screen or filter element can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the internal structure of the filter tube of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the guide groove part of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure of the piston groove and the push rod of the present invention;

[0031] Figure 5 It is a partial structural schematic diagram of a recorder of the present invention;

[0032] Figure 6 It is a schematic diagram of the internal structure of the water outlet of the present invention;

[0033] Figure 7 It is a schematic diagram of the structure of the rotating frame and the collecting box of the present invention;

[0034] Figure 8 It is a schematic diagram of the internal structure of the rotating frame and the cover plate of the present invention;

[0035] Fig. 9 It is a schematic diagram of the internal structure of the rotating frame of the present invention;

[0036] Fig.10 It is a schematic diagram of the structure of the connection part between the filter plate and the draw rope of the present invention.

[0037] Description of the numbers in the figure:

[0038] 1. Filter tube; 101. Piston groove; 102. Push rod; 103. Collection box; 104. Cover plate; 105. Second water inlet; 106. One-way valve; 107. Baffle; 108. Door plate; 109. Water outlet; 110. Electronic valve; 111. Submersible pump; 112. Recorder; 113. Calculation module; 114. Control module; 115. Flow rate detector; 116. Evaluation module;

[0039] 2. Filter assembly; 201. Rotating frame; 202. Filter plate; 203. Ball bearing; 204. Compression spring;

[0040] 3. Guide groove; 301. First horizontal arc groove; 302. Second horizontal arc groove; 303. Vertical groove;

[0041] 4. Cavity; 401. Piston plate; 402. First water inlet; 403. Connecting pipe; 404. Pull rope; 405. Support spring. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0043] See also Figures 1 to 10 A filtering device for zebrafish breeding includes a filtering tube 1, a filtering assembly 2 is arranged inside the filtering tube 1, the filtering assembly 2 includes a rotating frame 201 rotatably mounted inside the filtering tube 1, the rotating frame 201 is a "Y"-shaped structure, and a filtering plate 202 for filtering water is slidably mounted inside a vacant part around the rotating frame 201;

[0044] A piston groove 101 is provided at a position on the inner wall of the filter tube 1 corresponding to the filter plate 202. A push rod 102 is slidably installed inside the piston groove 101 to push the filter plate 202 and the rotating frame 201 to rotate. The piston groove 101 and the push rod 102 are both arc-shaped structures, and the push rod 102 is slidably connected to the piston groove 101.

[0045] A collecting box 103 for collecting filtered materials is provided at the lower side of the rotating frame 201, and the upper end of the collecting box 103 is fitted with the lower end of the rotating frame 201, and the collecting box 103 corresponds to the position of one of the filter plates 202, and the collecting box 103 is fixedly installed inside the filter tube 1, and the collecting box 103 blocks the lower end of the unused filter plate 202; when the rotating frame 201 does not rotate, water will only pass through one of the filter plates 202, and flow to the upper side of the filter tube 1 through the filter plate 202.

[0046] A guide groove 3 is provided at a position corresponding to the inner wall of the filter tube 1 and the filter plate 202. The guide groove 3 consists of a first horizontal arc groove 301, a second horizontal arc groove 302 and two vertical grooves 303. The two ends of the vertical groove 303 are respectively connected to the first horizontal arc groove 301 and the second horizontal arc groove 302. The piston groove 101 is located inside the side wall of the filter tube 1. Only one end of the piston groove 101 is connected to the inside of the first horizontal arc groove 301. The first horizontal arc groove 301 is in an open state. The push rod 102 is located in the piston groove 102 so that the piston groove 102 is in a sealed state.

[0047] A ball 203 is embedded in the position corresponding to the filter plate 202 and the guide groove 3, and the push rod 102 pushes the ball 203. A compression spring 204 is fixedly installed on the upper end of the filter plate 202, and the compression spring 204 squeezes the filter plate 202. A submersible pump 111 is connected to the lower end of the filter tube 1, and a recorder 112 is slidably provided on the upper end of the position where one of the vertical grooves 303 is connected to the first horizontal arc groove 301, and the recorder 112 blocks the end of the push rod 102;

[0048] A cavity 4 is provided inside the rotating frame 201, a piston plate 401 is slidably installed inside the cavity 4, a first water inlet 402 is provided at the upper end of the rotating frame 201 at a position corresponding to the cavity 4, and when the piston plate 401 descends in the cavity 4, the water inside the filter tube 1 is sucked into the upper side of the cavity 4, and a connecting pipe 403 is rotatably connected to the lower side of the rotating frame 201, one end of the connecting pipe 403 is connected to the lower side of the cavity 4, and the other end of the connecting pipe 403 is connected to the inside of the piston groove 101;

[0049] A plurality of pull ropes 404 are fixedly mounted at the lower end of the piston plate 401 . The number of the pull ropes 404 is the same as the number of the filter plates 202 . One end of the pull rope 404 away from the piston plate 401 passes through the inner wall of the cavity 4 and extends to the outside thereof and is fixedly connected to the filter plate 202 .

[0050] By adopting the above technical solution, when the device is in use, the submersible pump 111 is placed in the breeding container, and then the submersible pump 111 is used to pump the water in the breeding container into the filter tube 1. After the water enters the filter tube 1, it will first pass through one of the filter plates 202. At this time, the filter plate 202 can filter the water, so that impurities are blocked. When impurities accumulate on the lower side of the filter plate 202, the water flow rate will decrease. When there are too many impurities on the lower side of the filter plate 202, the resistance to water will increase. At this time, the filter plate 202 will rise in the rotating frame 201 under the action of water pressure. In the process of the filter plate 202 rising, the ball 203 will rise along the vertical groove 303 with the filter plate 202. When the ball 203 rises to a certain position, it can Enter the connection between the first horizontal arc groove 301 and the vertical groove 303, wherein, during the rising process of the filter plate 202, the pull rope 404 can be pulled to make the piston plate 401 descend in the cavity 4, and during the descending process of the piston plate 401, the air on the lower side of the cavity 4 will be squeezed, at this time, the pressure in the piston groove 101 and the connecting pipe 403 connected with the cavity 4 will increase, because the ball 203 is located in the vertical groove 303 during the rising process of the piston plate 401, at this time, the push rod 102 is blocked by the recorder 112 and cannot extend out of the piston groove 101, when the ball 203 rises to the connection between the first horizontal arc groove 301 and the vertical groove 303, the ball 203 squeezes the recorder 112 to make the recorder 112 move upward. The push rod 102 moves away from the bottom of the cavity 4. At this time, the recorder 112 no longer blocks the push rod 102, and the push rod 102 can move under the pressure of the air in the piston groove 101. After the filter plate 202 is located at the uppermost end and the ball 203 enters the first horizontal arc groove 301, the filter plate 202 will not drop. At this time, the filter plate 202 can pull the piston plate 401 through the pull rope 404, so that it is located at the bottom of the cavity 4. In the process of air squeezing the push rod 102, the air always maintains a high-pressure state. Therefore, when the recorder 112 moves away from the end of the push rod 102 and does not block the push rod 102, the push rod 102 can move quickly under the action of the high-pressure gas, thereby pushing the ball 203 and pushing the ball 203 The filter plate 202 and the rotating frame 201 rotate, and the filter plate 202 moves along the first horizontal arc groove 301 during the rotation. When the ball 203 moves to the other end of the first horizontal arc groove 301, the ball 203 is located at the connection between the other vertical groove 303 and the first horizontal arc groove 301. At this time, since the lower end of the rotating frame 201 is in contact with the upper end of the collecting box 103, water can no longer impact the filter plate 202 located on the upper side of the collecting box 103. At this time, the filter plate 202 located on the upper side of the collecting box 103 will quickly push the filter plate 202 down under the action of the compression spring 204. At this time, the filter plate 202 can drive the ball 203 to descend along the direction of the vertical groove 303 into the second horizontal arc groove 302.When the ball 203 is located at the connection point between the second horizontal arc groove 302 and the vertical groove 303, the ball 203 will stop the filter plate 202 from moving suddenly under the obstruction of the second horizontal vertical groove 303. At this time, the impurities on the lower side of the filter plate 202 will fall into the collection box 103 for storage under inertia.

[0051] A support spring 405 is fixedly mounted on the lower end of the piston plate 401, and the support spring 405 presses the piston plate 401;

[0052] A cover plate 104 is fixedly installed inside the filter tube 1, the lower end of the cover plate 104 is fitted with the upper end of the rotating frame 201, the rotating frame 201 is rotatably connected to the cover plate 104, a second water inlet 105 is opened at a position of the cover plate 104 corresponding to the first water inlet 402, and a one-way valve 106 is installed inside the second water inlet 105, the inside of the side of the cover plate 104 corresponding to the collection box 103 is hollow, and the lower end of the hollow part of the cover plate 104 is a filter mesh structure, and the hollow part of the cover plate 104 is connected to the inside of the second water inlet 105;

[0053] A baffle 107 is fixedly installed on the upper side of the collecting box 103. The baffle 107 is a filter mesh structure and is arranged in an inclined state inside the collecting box 103. There is a gap between the end of the baffle 107 close to the filter tube 1 and the inner wall of the filter tube 1. A door panel 108 is installed at the position corresponding to the filter tube 1 and the collecting box 103. The door panel 108 is a filter mesh structure. After the door panel 108 is opened, impurities in the collecting box 103 can be taken out.

[0054] By adopting the above technical solution, the pull rope 404 is tightened during the rising process of the filter plate 202, and the pressure on the upper side of the cavity 4 can be reduced when the piston plate 401 descends. In conjunction with the pressure of the water outside the filter tube 1, under the action of the pressure difference, the one-way valve 106 can be opened, and part of the water on the upper side of the filter tube 1 will enter the upper side of the cavity 4 through the second water inlet 105 and the first water inlet 402. Afterwards, the pull rope 404 gradually relaxes during the descending process of the filter plate 202. At this time, the piston plate 401 can rise quickly under the action of the support spring 405. After the piston plate 401 rises, it can squeeze the water on the upper side of the cavity 4. At this time, the one-way valve 106 will be closed after the pressure in the cavity 4 changes, and the water in the cavity 4 can enter the cover plate 104. , since the lower end of the hollow part of the cover plate 104 is in a filter mesh structure, water can flow down after passing through the hollow part of the cover plate 104, and the water at this time can impact the upper end of the filter plate 202, so that the impurities in the holes of the filter plate 202 are flushed out into the collection box 103, and then the water entering the collection box 103 will flow out of the filter tube 1 through the door panel 108, and then it will be guided back to the breeding container, wherein the baffle 107 can prevent water from entering the collection box 103 during the rotation of the rotating frame 201, causing the impurities in the collection box 103 to flow out easily, and the baffle 107 can effectively prevent impurities from flowing out of the collection box 103, and the gap between the baffle 107 and the inner wall of the filter tube 1 when the baffle 107 is tilted can facilitate the impurities on its upper side to slide into the collection box 103.

[0055] Two water outlets 109 are provided at the upper end of the filter tube 1. The two water outlets 109 face opposite directions. One of the water outlets 109 is connected to the inside of the breeding container, and the other water outlet 109 is connected to the outside of the breeding container. Electronic valves 110 are installed inside the two water outlets 109.

[0056] A recorder 112 is slidably provided at the upper end of the position where one of the vertical grooves 303 is connected to the first horizontal arc groove 301. The recorder 112 blocks the end of the push rod 102. When the ball 203 squeezes the lower end of the recorder 112, the number of counts of the recorder 112 increases. A calculation module 113 and a control module 114 are installed on the outer wall of the filter tube 1. The control module 114 controls the opening and closing of the electronic valve 110, and the control module 114 controls the working time of the submersible pump 111.

[0057] Recorder 112: transmits the recorded data to the calculation module 113;

[0058] Calculation module 113: After receiving the data from recorder 112, it determines whether the impurities in the water exceed the standard by the following formula:

[0059] ;

[0060] Wherein, Q is the frequency at which the filter plate 202 contacts the recorder 112, n is the number of times recorded by the recorder 112, including the number of times the ball 203 squeezes the recorder 112 and the number of times the push rod 102 contacts the lower end of the recorder 112, and t is the basic working time of the submersible pump 111. When Q is greater than the preset frequency, the control module 114 controls the electronic valve 110 in the water outlet 109 connected to the outside of the breeding container to open, and at the same time controls the electronic valve 110 in the water outlet 109 connected to the inside of the breeding container to close, so that water is discharged from the breeding container. When Q is less than the preset frequency, the control module 114 controls the opening and closing states of the two electronic valves 110 to be reversed;

[0061] A flow rate detector 115 is installed on the upper side of the filter tube 1. The flow rate detector 115 transmits the monitoring data to the calculation module 113, and the calculation module 113 calculates the average water flow velocity. The calculation module 113 transmits the calculated average water flow velocity to the control module 114. An evaluation module 116 is also provided outside the filter tube 1. When the frequency of the filter plate 202 contacting the recorder 112 is greater than or less than the preset frequency, the data is transmitted to the control module 114. The control module 114 controls the total working time of the submersible pump 111 through the following formula:

[0062] When Q is less than the preset frequency: ;

[0063] When Q is greater than the preset frequency: ;

[0064] Among them, T is the total working time of the submersible pump 111, t is the basic working time of the submersible pump 111, V is the water volume in the breeding container, D is the diameter of the filter tube 1, and S is the average speed of water in the filter tube 1. When the total working time of the submersible pump 111 reaches the specified time, the control module 114 controls the submersible pump 111 to stop working. When the submersible pump 111 stops working, the control module 114 controls the electronic valve 110 in the water outlet 109 connected to the breeding container to open, and controls another electronic valve 110 to close.

[0065] The above are only preferred specific implementations of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filtering device for zebrafish breeding, comprising a filtering tube (1), characterized in that: A filter assembly (2) is provided inside the filter tube (1), and the filter assembly (2) comprises a rotating frame (201) rotatably mounted inside the filter tube (1), the rotating frame (201) being in a "Y"-shaped structure, and a filter plate (202) for filtering water is slidably mounted inside a vacant portion around the rotating frame (201); A piston groove (101) is provided at a position on the inner wall of the filter tube (1) corresponding to the filter plate (202), a push rod (102) is slidably installed inside the piston groove (101) for pushing the filter plate (202) and the rotating frame (201) to rotate, the piston groove (101) and the push rod (102) both have an arc-shaped structure, and the push rod (102) is slidably connected to the piston groove (101); A collecting box (103) for collecting filtered matter is provided at the lower side of the rotating frame (201); the upper end of the collecting box (103) is in contact with the lower end of the rotating frame (201); the collecting box (103) corresponds to the position of one of the filter plates (202); and the collecting box (103) is fixedly mounted inside the filter tube (1); the collecting box (103) blocks the lower end of the unused filter plate (202); A guide groove (3) is provided at a position of the inner wall of the filter tube (1) corresponding to the filter plate (202); a ball (203) is embedded at a position of the filter plate (202) corresponding to the guide groove (3); the push rod (102) pushes the ball (203); a compression spring (204) is fixedly mounted on the upper end of the filter plate (202); and the compression spring (204) presses the filter plate (202); A cavity (4) is provided inside the rotating frame (201), a piston plate (401) is slidably mounted inside the cavity (4), a plurality of pull ropes (404) are fixedly mounted on the lower end of the piston plate (401), the number of the pull ropes (404) being the same as the number of the filter plates (202), and one end of the pull rope (404) away from the piston plate (401) passes through the inner wall of the cavity (4) and extends to the outside thereof and is fixedly connected to the filter plate (202); A connecting pipe (403) is rotatably connected to the lower side of the rotating frame (201), one end of the connecting pipe (403) is connected to the lower side of the cavity (4), and the other end of the connecting pipe (403) is connected to the inside of the piston groove (101); The guide groove (3) is composed of a first horizontal arc-shaped groove (301), a second horizontal arc-shaped groove (302) and two vertical grooves (303), and the two ends of the vertical groove (303) are respectively connected to the first horizontal arc-shaped groove (301) and the second horizontal arc-shaped groove (302); A first water inlet (402) is provided at a position on the upper end of the rotating frame (201) corresponding to the cavity (4), and when the piston plate (401) descends in the cavity (4), water inside the filter tube (1) is sucked into the upper side of the cavity (4); A support spring (405) is fixedly mounted on the lower end of the piston plate (401), and the support spring (405) presses the piston plate (401); A cover plate (104) is fixedly installed inside the filter tube (1), the lower end of the cover plate (104) is in contact with the upper end of the rotating frame (201), the rotating frame (201) and the cover plate (104) are rotatably connected, a second water inlet (105) is provided at a position of the cover plate (104) corresponding to the first water inlet (402), and a one-way valve (106) is installed inside the second water inlet (105), the inside of the side of the cover plate (104) corresponding to the collection box (103) is hollow, and the lower end of the hollow part of the cover plate (104) is a filter mesh structure, and the hollow part of the cover plate (104) is in communication with the inside of the second water inlet (105); A baffle (107) is fixedly mounted on the upper side of the interior of the collection box (103); the baffle (107) is in a filter mesh structure, and the baffle (107) is arranged in an inclined manner inside the collection box (103); a gap is provided between the end of the baffle (107) close to the filter tube (1) and the inner wall of the filter tube (1); a door plate (108) is mounted at a position corresponding to the filter tube (1) and the collection box (103); the door plate (108) is in a filter mesh structure; two water outlets (109) are provided at the upper end of the filter tube (1); the two water outlets (109) face opposite directions, one of the water outlets (109) is in communication with the interior of the culture container, and the other water outlet (109) is in communication with the exterior of the culture container; and electronic valves (110) are installed inside the two water outlets (109); and a submersible pump (111) is installed at the lower end of the filter tube (1); A recorder (112) is slidably provided at the upper end of a position where one of the vertical grooves (303) is connected to the first horizontal arc groove (301); the recorder (112) blocks the end of the push rod (102); when the ball (203) squeezes the lower end of the recorder (112), the number of counts in the recorder (112) increases; a calculation module (113) and a control module (114) are installed on the outer wall of the filter tube (1); the control module (114) controls the opening and closing of the electronic valve (110), and the control module (114) controls the working time of the submersible pump (111); Recorder (112): transmits the recorded data to the calculation module (113); Calculation module (113): after receiving the data from the recorder (112), it determines whether the impurities in the water exceed the standard by using the following formula: ； Wherein, Q is the frequency at which the filter plate (202) contacts the recorder (112), n is the number of times recorded by the recorder (112), and t is the basic working time of the submersible pump (111). When Q is greater than a preset frequency, the control module (114) controls the electronic valve (110) in the water outlet (109) connected to the outside of the breeding container to open, and at the same time controls the electronic valve (110) in the water outlet (109) connected to the inside of the breeding container to close, so that water is discharged from the breeding container. When Q is less than the preset frequency, the control module (114) controls the opening and closing states of the two electronic valves (110) to be reversed.

2. A filter device for zebrafish breeding according to claim 1, characterized in that: A flow rate detector (115) is installed on the upper side of the filter tube (1). The flow rate detector (115) transmits monitoring data to the calculation module (113). The calculation module (113) calculates the average water flow velocity. The calculation module (113) transmits the calculated average water flow velocity to the control module (114). An evaluation module (116) is also provided on the outside of the filter tube (1). When the frequency at which the filter plate (202) contacts the recorder (112) is greater than or less than a preset frequency, the data is transmitted to the control module (114). The control module (114) controls the total working time of the submersible pump (111) using the following formula: When Q is less than the preset frequency: ; When Q is greater than the preset frequency: ; Wherein, T is the total working time of the submersible pump (111), t is the basic working time of the submersible pump (111), V is the volume of water in the culture container, D is the diameter of the filter tube (1), and S is the average speed of water in the filter tube (1). When the total working time of the submersible pump (111) reaches a specified time, the control module (114) controls the submersible pump (111) to stop working. When the submersible pump (111) stops working, the control module (114) controls the electronic valve (110) in the water outlet (109) connected to the culture container to open, and controls another electronic valve (110) to close.

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