Filtering oxygenation device based on centrifugal pump and fish culture system

Abstract

The utility model is applicable to the technical field of fish tanks, and provides a centrifugal pump-based filtering oxygenation device, which comprises a sealed cylinder body provided with a water outlet and a water inlet, the cylinder body comprises a centrifugal pump, a connecting component, a four-way connector, a filtering component and an oxygenation component, the centrifugal pump is arranged inside or outside the cylinder body and is connected with the connecting component, and the four-way connector is connected with the filtering component. The four-way connector is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port of the four-way connector is connected with the connecting assembly, the third connecting port of the four-way connector is connected with the oxygen adding assembly, one end of the oxygen adding assembly is inserted into the cylinder body, and the other end of the oxygen adding assembly is inserted into the cylinder body. The second connecting opening of the four-way connector is connected with one end of the filtering assembly, and the other end of the filtering assembly is connected with the water inlet of the cylinder body. The utility model further provides a fish culture system which comprises the filtering oxygenation device at least based on the centrifugal pump. Therefore, automatic filtering and oxygenation of the fish tank are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fish tanks, in particular to a filtering and oxygenating device based on a centrifugal pump and a fish farming system. Background Art

[0002] Raising ornamental fish in fish tanks at home is pleasing to the eye, but it also brings the trouble of cleaning the fish tank. Not only is the cleaning of the fish tank very tedious, but it is also easy to hurt the fish, sometimes causing the death of the ornamental fish, casting a shadow on people's mood; ornamental fish must have a better living environment, such as oxygen content, to survive for a long time. The existing electric oxygen supply pump supplies oxygen to the water in the fish tank, but the electric supply pump is relatively complex in structure and requires a power supply nearby, so its application has certain limitations.

[0003] In summary, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0004] In view of the above-mentioned defects, the purpose of the present utility model is to provide a filtering and oxygenating device and a fish farming system based on a centrifugal pump, so as to realize automatic filtering and oxygenating of a fish tank.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a filtering and oxygenating device based on a centrifugal pump, comprising a sealed cylinder body, the cylinder body is provided with a water outlet and a water inlet, comprising a centrifugal pump, a connecting assembly, a four-way connector, a filtering assembly and an oxygenating assembly, the centrifugal pump is arranged inside the cylinder body, the centrifugal pump is connected to the connecting assembly through the water outlet, the four-way connector is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port of the four-way connector is connected to the connecting assembly, the third connecting port of the four-way connector is connected to the oxygenating assembly, one end of the oxygenating assembly is plugged into the cylinder body, the second connecting port of the four-way connector is connected to one end of the filtering assembly, and the other end of the filtering assembly is connected to the water inlet of the cylinder body; or

[0006] The centrifugal pump is arranged outside the cylinder body, a connecting pipe is arranged between the centrifugal pump and the water outlet, one end of the centrifugal pump is connected to the connecting assembly, the four-way connector is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port of the four-way connector is connected to the connecting assembly, the third connecting port of the four-way connector is connected to the oxygenation assembly, one end of the oxygenation assembly is plugged into the cylinder body, the second connecting port of the four-way connector is connected to one end of the filter assembly, and the other end of the filter assembly is connected to the water inlet of the cylinder body.

[0007] According to the centrifugal pump-based filtering and oxygenation device of the utility model, the centrifugal pump is a submersible pump arranged inside the cylinder; or,

[0008] The centrifugal pump is a water pump provided with a cylinder body outside.

[0009] According to the centrifugal pump-based filtering and oxygenation device described in the utility model, the filtering assembly includes a first connecting pipe, a sealed filter tank and a second connecting pipe, one end of the first connecting pipe is connected to the four-way connector, the other end of the first connecting pipe is connected to the sealed filter tank, one end of the second connecting pipe is connected to the sealed filter tank, and the other end of the second connecting pipe is connected to the water inlet of the cylinder body.

[0010] According to the centrifugal pump-based filtering and oxygenation device described in the utility model, the sealed filtering tank is provided with a filtering chamber and a sewage chamber, the filtering chamber is provided at the upper end of the sewage chamber, and a sewage chamber partition is provided between the filtering chamber and the sewage chamber.

[0011] According to the centrifugal pump-based filtering and oxygenation device of the utility model, the filtering chamber is provided with biochemical filtering cotton.

[0012] According to the centrifugal pump-based filtering and oxygenation device of the utility model, the sewage chamber is provided with a sewage pipe and a sewage valve.

[0013] According to the centrifugal pump-based filtering and oxygenating device described in the utility model, the sealed filter tank is provided with a sealed filter tank water inlet and a sealed filter tank water outlet, the first connecting pipe is connected to the sealed filter tank water inlet, and the second connecting pipe is connected to the sealed filter tank water outlet.

[0014] According to the centrifugal pump-based filtering and oxygenation device of the utility model, the diameter of the second connecting port is two-thirds of the diameter of the first connecting port, and the diameter of the third connecting port is one-fifth of the diameter of the first connecting port.

[0015] According to the centrifugal pump-based filtering and oxygenation device described in the utility model, the oxygenation component is provided with a four-way connector water outlet channel, an air inlet channel and a one-way valve, the air inlet channel is arranged on the side of the four-way connector water outlet channel, and the outer end of the air inlet channel is connected to the one-way valve.

[0016] The utility model also provides a fish farming system, comprising an automatic feeding device, an internal and external air pressure self-balancing device, an auxiliary oxygenation device, a heating device and the centrifugal pump-based filtering oxygenation device.

[0017] The utility model provides a centrifugal pump-based filtering and oxygenation device and fish farming system, including a sealed cylinder, the cylinder is provided with a water outlet and a water inlet, including a centrifugal pump, a connecting assembly, a four-way connector, a filtering assembly and an oxygenation assembly, the centrifugal pump is arranged inside or outside the cylinder, the centrifugal pump is connected to the connecting assembly through the water outlet, the water on the connecting assembly is divided into the oxygenation assembly and the filtering assembly after passing through the four-way connector, the oxygenation assembly oxygenates the water and then flows back into the cylinder, and the filtering assembly filters the water and then flows back into the cylinder. In this way, the utility model realizes automatic filtering and oxygenation of the fish tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a centrifugal pump-based filtering and oxygenation device and a fish farming system of the utility model;

[0019] Figure 2 It is a structural schematic diagram of another embodiment of a centrifugal pump-based filtering and oxygenation device and a fish farming system of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] The utility model provides a filtering and oxygenating device 20 based on a centrifugal pump, comprising a sealed cylinder body 10, wherein the cylinder body 10 is provided with a water outlet 101 and a water inlet 102, comprising a centrifugal pump, a connecting assembly 2, a four-way connector 3, a filtering assembly 4 and an oxygenating assembly 5, wherein the centrifugal pump is arranged inside the cylinder body 10, and the centrifugal pump is a centrifugal water pump with an impeller, and can also be used for pumping water after the pipeline is filled with water, the centrifugal pump 1 is connected to the connecting assembly 2 through the water outlet 101, a first sealing connecting member 11 is provided between the centrifugal pump and the water outlet 101 of the cylinder body 10, the centrifugal pump and the cylinder body 10 are sealed and watertight, a second sealing connecting member 12 is provided between the centrifugal pump and the connecting assembly 2, the centrifugal pump and the connecting assembly 2 are sealed and watertight, the connecting assembly 2 is a water outlet connecting pipeline 2, the four-way connector 3 is provided with a first connecting port 31, a second connecting port 32 and a third connecting port 33, and the first connecting port 31 of the four-way connector 3 is connected to the connecting assembly 2 The third connection port 33 of the four-way connector 3 is connected to the oxygenation component 5, one end of the oxygenation component 5 is inserted into the cylinder body 10, a third sealing connector 54 is provided between the oxygenation component 5 and the cylinder body 10, the oxygenation component 5 and the cylinder body 10 are sealed and watertight, the second connection port 32 of the four-way connector 3 is connected to one end of the filter component 4, a fourth sealing connector 21 is provided between the first connection port 31 of the four-way connector 3 and the connection component 2, the first connection port 31 of the four-way connector 3 and the connection component 2 are sealed and watertight, a fifth sealing connector 34 is provided between the second connection port 32 of the four-way connector 3 and the filter component 4, the second connection port 32 of the four-way connector 3 and the filter component 4 are sealed and watertight, the other end of the filter component 4 is connected to the water inlet 102 of the cylinder body 10, a sixth sealing connector 44 is provided between the filter component 4 and the water inlet 102 of the cylinder body 10, and the filter component 4 and the water inlet 102 of the cylinder body 10 are sealed and watertight.

[0022] Preferably, the centrifugal pump is arranged outside the cylinder body 10, a connecting pipe 7 is provided between the centrifugal pump and the water outlet 101, a water outlet sealing connector 1011 is provided between the connecting pipe 7 and the water outlet 101, a centrifugal pump sealing connector 61 is provided between the connecting pipe 7 and the centrifugal pump, one end of the centrifugal pump is connected to the connecting assembly 2, a second sealing connector 12 is provided between the centrifugal pump and the connecting assembly 2, the connecting assembly 2 is a water outlet connecting pipe 2, the four-way connector 3 is provided with a first connecting port 31, a second connecting port 32 and a third connecting port 33, the first connecting port 31 of the four-way connector 3 is connected to the connecting assembly 2, and the four-way connector The third connection port 33 of the four-way connector 3 is connected to the oxygenation component 5, one end of the oxygenation component 5 is inserted into the cylinder body 10, and a third sealing connection member 54 is provided between the oxygenation component 5 and the cylinder body 10. The second connection port 32 of the four-way connector 3 is connected to one end of the filter component 4, a fourth sealing connection member 21 is provided between the first connection port 31 of the four-way connector 3 and the connection component 2, a fifth sealing connection member 34 is provided between the second connection port 32 of the four-way connector 3 and the filter component 4, the other end of the filter component 4 is connected to the water inlet 102 of the cylinder body 10, and a sixth sealing connection member 44 is provided between the filter component 4 and the water inlet 102 of the cylinder body 10.

[0023] Preferably, the centrifugal pump is a submersible pump 1 disposed inside the cylinder body 10 ; or, the centrifugal pump is a water pump 6 disposed outside the cylinder body 10 .

[0024] Reference Figure 1In the first embodiment of the utility model, the centrifugal pump is a submersible pump 1, which is arranged inside the cylinder body 10, and the water outlet 101 of the cylinder body 10 is arranged at the bottom of the side of the cylinder body 10. The submersible pump 1 is connected to the connecting component 2 through the water outlet 101, and the four-way connector 3 is provided with a first connecting port 31, a second connecting port 32 and a third connecting port 33. The first connecting port 31 of the four-way connector 3 is connected to the connecting component 2, and the third connecting port 33 of the four-way connector 3 is connected to the oxygenating component 5. One end of the oxygenating component 5 is inserted into the cylinder body 10, and the second connecting port 3 of the four-way connector 3 is connected to the oxygenating component 5. The port 32 is connected to one end of the filter assembly 4, and the other end of the filter assembly 4 is connected to the water inlet 102 of the cylinder body 10. The submersible pump 1 generates pressure by rotating the impeller to pump the water in the cylinder body 10 out of the cylinder body 10 through the water outlet 101. The water enters the four-way connector 3 through the water outlet connecting pipe 2. The water is divided into two parts in the four-way connector 3. One part of the water enters the filter assembly 4 through the second connecting port 32 of the four-way connector 3. The filter assembly 4 includes a first connecting pipe 41, a sealed filter tank 42 and a second connecting pipe 43. The water entering the filter assembly 4 first passes through the first connecting pipe 2. After taking over the pipe 41, the water is pressed into the sealed filter tank 42 through the sealed filter tank water inlet 427 of the sealed filter tank 42 for filtration and purification. A seventh sealing connection member 45 is provided between the sealed filter tank water inlet 427 and the first connecting pipe 41. The filtered water then passes through the sealed filter tank water outlet 421 of the sealed filter tank 42 and enters the second connecting pipe 43. An eighth sealing connection member 46 is provided between the second connecting pipe 43 and the sealed filter tank water outlet 421. The water in the second connecting pipe 43 flows back into the cylinder body 10 through the water inlet 102 of the cylinder body 10. The water in the sealed filter tank 42 A filter chamber 422 and a sewage chamber 423 are provided. The filter chamber 422 is provided at the upper end of the sewage chamber 423. A sewage chamber partition 424 is provided between the filter chamber 422 and the sewage chamber 423. The biochemical filter cotton in the filter chamber 422 filters the water in the filter chamber 422. The water is filtered out of residues under the filtration of the biochemical filter cotton, and the residues fall into the sewage chamber 423. After the residues in the sewage chamber 423 accumulate for a period of time, the sewage valve 425 of the sewage chamber 423 is opened, and the residues are discharged from the sewage chamber 423 through the sewage pipe 426 of the sewage chamber 423, thereby filtering the water in the cylinder body 10.Another part of the water enters the oxygenation component 5 through the third connection port 33 of the four-way connector 3. The oxygenation component 5 is provided with a four-way connector water outlet channel 51, an air inlet channel 52 and a one-way valve 53. The air inlet channel 52 is arranged on the side of the four-way connector water outlet channel 51. An air inlet channel protrusion 521 is arranged at the connection between the air inlet channel 52 and the inner part of the four-way connector water outlet channel 51. The diameter of the four-way connector water outlet channel 51 at the air inlet channel protrusion 521 becomes smaller. The outer end of the air inlet channel 52 is connected to the one-way valve 53. The diameter of the air inlet channel 52 is one-third of the diameter of the four-way connector water outlet channel 51. The one-way valve 53 can only be used for one-way flow. The water in the cylinder 10 is sucked into the water outlet channel 51 of the four-way connector, but no medium can flow out, thereby preventing the water in the cylinder 10 from flowing out through the water outlet channel 51 of the four-way connector when the submersible pump 1 is not working. The first connection port 31 of the four-way connector 3 has the largest diameter, the second connection port 32 of the four-way connector 3 has a diameter of two-thirds of the diameter of the first connection port 31 of the four-way connector 3, and the third connection port 33 of the four-way connector 3 has a diameter of one-fifth of the diameter of the first connection port 31 of the four-way connector 3. Of course, the ratio of the diameters of the four-way connector 3, the water outlet channel 51 of the four-way connector and the air inlet channel 52 is not fixed. In order to achieve the predetermined effect, the diameters between the first connection port 31, the second connection port 32 and the third connection port 33 of the four-way connector 3 and the diameter setting of the four-way connector water outlet channel 51 enable most of the water to flow into the sealed filter tank 42 to achieve water cleaning filtration, while increasing the flow rate of the water in the four-way connector water outlet channel 51. The diameter of the four-way connector water outlet channel 51 is small. After passing through the four-way connector water outlet channel 51, the water does not pass through the sealed filter tank 42 but directly flows into the cylinder body 10, with small resistance and fast water flow speed. The water outlet position of the four-way connector water outlet channel 51 is set 3 meters below the water surface of the fish tank. cm or more, the resistance of water outlet from the four-way connector water outlet channel 51 is further reduced, the diameter of the four-way connector water outlet channel 51 at the air inlet channel protrusion 521 becomes smaller, the water in the four-way connector water outlet channel 51 flows faster when passing through the first air inlet channel protrusion 521, and the water flowing in the four-way connector water outlet channel 51 generates negative pressure in the first air inlet channel 52, so that air enters the four-way connector water outlet channel 51 through the one-way valve 53 and the air inlet channel 52 and mixes with the water. After the water and air are mixed, they enter the cylinder body 10 from the four-way connector water outlet channel 51, thereby achieving oxygenation of the water. According to the size of the cylinder 10 and the number of fish, the working of the submersible pump 1 can be controlled by a specially designed time control software, so that the fish farmer can adjust the working time of the submersible pump 1 by himself. For example, the control software can set the submersible pump 1 to automatically work for 10 minutes or 20 minutes every hour. The working time of the submersible pump 1 can be set by adjusting the knob, based on the standard that the fish in the cylinder 10 do not float, there is no hypoxia, and there is no fish feces residue in the water of the cylinder 10, which is relatively clean. Extend the use time of the submersible pump 1 and save electricity.

[0025] Reference Figure 2In the second embodiment of the utility model, different from the first embodiment mentioned above, the centrifugal pump of this embodiment is a water pump 6, the water pump 1 is arranged outside the cylinder body 10 and is lower than the water level in the cylinder body 10, the water outlet 101 of the cylinder body 10 is arranged at the bottom of the side of the cylinder body 10, and a connecting pipe 7 is arranged between the water pump 6 and the water outlet 101, one end of the water pump 6 is connected to the connecting component 2, the connecting component 2 is a water outlet connecting pipe 2, the four-way connector 3 is provided with a first connecting port 31, a second connecting port 32 and a third connecting port 33, the first connecting port 31 of the four-way connector 3 is connected to the connecting component 2, the third connecting port 33 of the four-way connector 3 is connected to the oxygenation component 5, one end of the oxygenation component 5 is inserted into the cylinder body 10, the second connecting port 32 of the four-way connector 3 is connected to one end of the filter component 4, and the other end of the filter component 4 is connected to the water inlet 102 of the cylinder body 10. Specifically, the water pump 6 generates pressure by the rotation of the impeller to pump the water in the cylinder body 10 out of the cylinder body 10 through the water outlet 101. After passing through the water pump 6, the water enters the four-way connector 3 through the water outlet connecting pipe 2. The water enters the four-way connector 3 through the water outlet connecting pipe 2. The water is divided into two parts in the four-way connector 3. One part of the water enters the filter component 4 through the second connection port 32 of the four-way connector 3. The filter component 4 includes a first connecting pipe 41, a sealed filter tank 42 and a second connecting pipe 43. The water entering the filter component 4 first passes through the first connecting pipe 41 and is pressed into the sealed filter tank 42 from the sealed filter tank water inlet 427 of the sealed filter tank 42 for filtration and purification. A seventh sealing connector 45 is provided between the sealed filter tank water inlet 427 and the first connecting pipe 41. The filtered water then passes through the sealed filter tank outlet of the sealed filter tank 42. The water inlet 421 enters the second connecting pipe 43. An eighth sealing connector 46 is provided between the second connecting pipe 43 and the water outlet 421 of the sealed filter tank. The water in the second connecting pipe 43 flows back into the cylinder body 10 through the water inlet 102 of the cylinder body 10. A filter chamber 422 and a sewage chamber 423 are provided in the sealed filter tank 42. The filter chamber 422 is provided at the upper end of the sewage chamber 423. A sewage chamber partition 424 is provided between the filter chamber 422 and the sewage chamber 423. The biochemical filter cotton in the filter chamber 422 filters the water in the filter chamber 422. The water is filtered out of residues under the filtration of the biochemical filter cotton, and the residues fall into the sewage chamber 423. After the residues in the sewage chamber 423 accumulate for a period of time, the drain valve 425 of the sewage chamber 423 is opened, and the residues are discharged from the sewage chamber 423 through the drain pipe 426 of the sewage chamber 423, thereby filtering the water in the cylinder body 10.Another part of the water enters the oxygenation component 5 through the third connection port 33 of the four-way connector 3. The oxygenation component 5 is provided with a four-way connector water outlet channel 51, an air inlet channel 52 and a one-way valve 53. The air inlet channel 52 is arranged on the side of the four-way connector water outlet channel 51. An air inlet channel protrusion 521 is arranged at the connection between the air inlet channel 52 and the inner part of the four-way connector water outlet channel 51. The diameter of the four-way connector water outlet channel 51 at the air inlet channel protrusion 521 becomes smaller. The outer end of the air inlet channel 52 is connected to the one-way valve 53. The diameter of the air inlet channel 52 is one-third of the diameter of the four-way connector water outlet channel 51. The one-way valve 53 can only be used for one-way flow. The water in the cylinder 10 is sucked into the water outlet channel 51 of the four-way connector, but no medium can flow out, thereby preventing the water in the cylinder 10 from flowing out through the water outlet channel 51 of the four-way connector when the water pump 6 is not working. The first connection port 31 of the four-way connector 3 has the largest diameter, the second connection port 32 of the four-way connector 3 has a diameter of two-thirds of the diameter of the first connection port 31 of the four-way connector 3, and the third connection port 33 of the four-way connector 3 has a diameter of one-fifth of the diameter of the first connection port 31 of the four-way connector 3. Of course, the ratio of the diameters of the four-way connector 3, the water outlet channel 51 of the four-way connector and the air inlet channel 52 is not fixed. In order to achieve the predetermined effect, the diameters between the first connection port 31, the second connection port 32 and the third connection port 33 of the four-way connector 3 and the diameter setting of the four-way connector water outlet channel 51 enable most of the water to flow into the sealed filter tank 42 to achieve water cleaning filtration, while increasing the flow rate of the water in the four-way connector water outlet channel 51. The diameter of the four-way connector water outlet channel 51 is small. After passing through the four-way connector water outlet channel 51, the water does not pass through the sealed filter tank 42 but directly flows into the cylinder body 10, with small resistance and fast water flow speed. The water outlet position of the four-way connector water outlet channel 51 is set 3 meters below the water surface of the fish tank. cm or more, the resistance of water outlet from the four-way connector water outlet channel 51 is further reduced, the diameter of the four-way connector water outlet channel 51 at the air inlet channel protrusion 521 becomes smaller, the water in the four-way connector water outlet channel 51 flows faster when passing through the first air inlet channel protrusion 521, and the water flowing in the four-way connector water outlet channel 51 generates negative pressure in the first air inlet channel 52, so that air enters the four-way connector water outlet channel 51 through the one-way valve 53 and the air inlet channel 52 and mixes with the water. After the water and air are mixed, they enter the cylinder body 10 from the four-way connector water outlet channel 51, thereby achieving oxygenation of the water. According to the size of the tank 10 and the number of fish, the operation of the water pump 6 can be controlled by a specially designed time control software, so that the fish farmer can adjust the working time of the water pump 6 by himself. For example, the control software can set the water pump 6 to automatically work for 10 minutes or 20 minutes every hour. The working time of the water pump 6 can be set by adjusting the knob, based on the standard that the fish in the tank 10 do not float, there is no hypoxia, and there is no fish feces residue in the water in the tank 10, which is relatively clean. Extend the use time of the water pump 6 and save electricity.

[0026] Preferably, the filter assembly 4 includes a first connecting pipe 41, a sealed filter tank 42 and a second connecting pipe 43, one end of the first connecting pipe 41 is connected to the four-way connector 3, the other end of the first connecting pipe 41 is connected to the sealed filter tank 42, one end of the second connecting pipe 43 is connected to the sealed filter tank 42, and the other end of the second connecting pipe 43 is connected to the water inlet 102 of the cylinder body 10. The water entering the filter assembly 4 first passes through the first connecting pipe 41 and is then pressed into the sealed filter tank 42 from the sealed filter tank water inlet 427 of the sealed filter tank 42 for filtration and purification. A seventh sealing connector 45 is provided between the sealed filter tank water inlet 427 and the first connecting pipe 41. The filtered water then enters the second connecting pipe 43 through the sealed filter tank water outlet 421 of the sealed filter tank 42, and the water in the second connecting pipe 43 flows back into the cylinder body 10 through the water inlet 102 of the cylinder body 10.

[0027] Preferably, the sealed filter tank 42 is provided with a filter chamber 422 and a sewage chamber 423, the filter chamber 422 is provided at the upper end of the sewage chamber 423, a sewage chamber partition 424 is provided between the filter chamber 422 and the sewage chamber 423, the biochemical filter cotton in the filter chamber 422 filters the water in the filter chamber 422, the water is filtered out of residues under the filtration of the biochemical filter cotton, and the residues fall into the sewage chamber 423.

[0028] Preferably, the filter chamber 422 is provided with a biochemical filter cotton, and the water is filtered out of the residue under the filtration of the biochemical filter cotton, and the residue falls into the sewage chamber 423.

[0029] Preferably, the sewage chamber 423 is provided with a sewage pipe 426 and a sewage valve 425. After the residue in the sewage chamber 423 accumulates for a period of time, the sewage valve 425 of the sewage chamber 423 is opened, and the residue is discharged from the sewage chamber 423 through the sewage pipe 426 of the sewage chamber 423.

[0030] Preferably, the sealed filter tank 42 is provided with a sealed filter tank 42 water inlet and a sealed filter tank water outlet 421, the first connecting pipe 41 is connected to the sealed filter tank 42 water inlet, the second connecting pipe 43 is connected to the sealed filter tank water outlet 421, the water of the first connecting pipe 41 enters the sealed filter tank 42 through the sealed filter tank 42 water inlet for filtration, the filtered water in the sealed filter tank 42 passes through the sealed filter tank water outlet 421 and then flows back into the cylinder body 10 through the second connecting pipe 43, thereby filtering the water.

[0031] Preferably, the diameter of the second connecting port 32 is two-thirds of the diameter of the first connecting port 31, and the diameter of the third connecting port 33 is one-fifth of the diameter of the first connecting port 31. Most of the water flows into the sealed filter tank 42 to achieve water cleaning filtration, while increasing the flow rate of water in the four-way connector water outlet channel 51. The four-way connector water outlet channel 51 has a small diameter. After passing through the four-way connector water outlet channel 51, the water flows directly into the cylinder body 10 without passing through the sealed filter tank 42. The resistance is small and the water flow rate is fast. The water flowing in the four-way connector water outlet channel 51 generates negative pressure in the first air inlet channel 52, so that the air enters the four-way connector water outlet channel 51 through the one-way valve 53 and the air inlet channel 52 and mixes with the water. After the water and air are mixed, they enter the cylinder body 10 from the four-way connector water outlet channel 51, thereby achieving oxygenation of the water.

[0032] Preferably, the oxygenation component 5 is provided with a four-way connector water outlet channel 51, an air inlet channel 52 and a one-way valve 53. The air inlet channel 52 is provided on the side of the four-way connector water outlet channel 51. An air inlet channel protrusion 521 is provided at the connection between the air inlet channel 52 and the inner part of the four-way connector water outlet channel 51. The diameter of the four-way connector water outlet channel 51 is reduced at the air inlet channel protrusion 521. The outer end of the air inlet channel 52 is connected to the one-way valve 53. The diameter of the air inlet channel 52 is one-third of the diameter of the four-way connector water outlet channel 51. The one-way valve 53 can only suck in the four-way connector water outlet channel 51 in one direction, but cannot flow out any medium, thereby preventing the water in the cylinder body 10 from passing through the four-way connector when the centrifugal pump is not working. The water flows out from the first water outlet channel 51 of the four-way connector, and after passing through the water outlet channel 51 of the four-way connector, it does not pass through the sealed filter tank 42 but directly flows into the cylinder body 10, with small resistance and fast water flow speed. The diameter of the water outlet channel 51 of the four-way connector becomes smaller at the protrusion 521 of the air inlet channel, and the water in the water outlet channel 51 of the four-way connector flows faster when passing through the protrusion 521 of the first air inlet channel. The water flowing in the water outlet channel 51 of the four-way connector generates negative pressure in the first air inlet channel 52, so that air enters the water outlet channel 51 of the four-way connector through the one-way valve 53 and the air inlet channel 52 and mixes with the water. After the water and air are mixed, they enter the cylinder body 10 from the water outlet channel 51 of the four-way connector, thereby realizing oxygenation of the water.

[0033] The utility model also provides a fish farming system, including an automatic feeding device 30, an internal and external air pressure self-balancing device 40, an auxiliary oxygenation device 60, a heating device 50 and the filtering oxygenation device 20 based on a submersible pump. The automatic feeding device 30 automatically feeds the fish in the cylinder body 10 in a fixed time and quantity. The internal and external air pressure self-balancing device 40 balances the air pressure inside the cylinder body 10 with the external air pressure and replenishes fresh air and oxygen into the cylinder body 10. When the number of fish raised is relatively large and the fish are relatively large, more dissolved oxygen is needed in the water. The auxiliary oxygenation device 60 increases the amount of dissolved oxygen in the water. When the ambient temperature is low, the heating device 50 heats the cylinder body 10 to make the temperature of the water in the cylinder body 10 suitable for the survival of the fish.

[0034] In summary, the utility model provides a centrifugal pump-based filtering and oxygenation device and fish farming system, including a sealed cylinder, the cylinder is provided with a water outlet and a water inlet, including a centrifugal pump, a connecting assembly, a four-way connector, a filtering assembly and an oxygenation assembly, the centrifugal pump is arranged inside or outside the cylinder, the centrifugal pump is connected to the connecting assembly through the water outlet, the water on the connecting assembly is divided into the oxygenation assembly and the filtering assembly after passing through the four-way connector, the oxygenation assembly oxygenates the water and then flows back into the cylinder, and the filtering assembly filters the water and then flows back into the cylinder. In this way, the utility model realizes automatic filtering and oxygenation of the fish tank.

[0035] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A centrifugal pump-based filtering and oxygenation device, comprising a sealed cylinder, the cylinder having a water outlet and a water inlet, characterized in that: It comprises a centrifugal pump, a connecting assembly, a four-way connector, a filtering assembly and an oxygenating assembly, wherein the centrifugal pump is arranged inside the cylinder body, the centrifugal pump is connected to the connecting assembly through the water outlet, the four-way connector is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port of the four-way connector is connected to the connecting assembly, the third connecting port of the four-way connector is connected to the oxygenating assembly, one end of the oxygenating assembly is plugged into the cylinder body, the second connecting port of the four-way connector is connected to one end of the filtering assembly, and the other end of the filtering assembly is connected to the water inlet of the cylinder body; or The centrifugal pump is arranged outside the cylinder body, a connecting pipe is arranged between the centrifugal pump and the water outlet, one end of the centrifugal pump is connected to the connecting assembly, the four-way connector is provided with a first connecting port, a second connecting port and a third connecting port, the first connecting port of the four-way connector is connected to the connecting assembly, the third connecting port of the four-way connector is connected to the oxygenation assembly, one end of the oxygenation assembly is plugged into the cylinder body, the second connecting port of the four-way connector is connected to one end of the filter assembly, and the other end of the filter assembly is connected to the water inlet of the cylinder body.

2. The centrifugal pump-based filtration and oxygenation device according to claim 1, characterized in that: The centrifugal pump is a submersible pump arranged inside the cylinder; or, The centrifugal pump is a water pump provided with a cylinder body outside.

3. The centrifugal pump-based filtration and oxygenation device according to claim 1, characterized in that: The filter assembly includes a first connecting pipe, a sealed filter tank and a second connecting pipe, one end of the first connecting pipe is connected to the four-way connector, the other end of the first connecting pipe is connected to the sealed filter tank, one end of the second connecting pipe is connected to the sealed filter tank, and the other end of the second connecting pipe is connected to the water inlet of the cylinder body.

4. The centrifugal pump-based filtration and oxygenation device according to claim 3, characterized in that: The sealed filter tank is provided with a filter chamber and a sewage chamber, the filter chamber is arranged at the upper end of the sewage chamber, and a sewage chamber partition is arranged between the filter chamber and the sewage chamber.

5. The centrifugal pump-based filtration and oxygenation device according to claim 4, characterized in that: The filter cavity is provided with biochemical filter cotton.

6. The centrifugal pump-based filtration and oxygenation device according to claim 4, characterized in that: The sewage chamber is provided with a sewage pipe and a sewage valve.

7. The centrifugal pump-based filtration and oxygenation device according to claim 3, characterized in that: The sealed filter tank is provided with a sealed filter tank water inlet and a sealed filter tank water outlet, the first connecting pipe is connected to the sealed filter tank water inlet, and the second connecting pipe is connected to the sealed filter tank water outlet.

8. The centrifugal pump-based filtration and oxygenation device according to claim 1, characterized in that: The diameter of the second connecting port is two-thirds of the diameter of the first connecting port, and the diameter of the third connecting port is one-fifth of the diameter of the first connecting port.

9. The centrifugal pump-based filtration and oxygenation device according to claim 1, characterized in that: The oxygenation component is provided with a four-way connector water outlet channel, an air inlet channel and a one-way valve. The air inlet channel is arranged on the side of the four-way connector water outlet channel, and the outer end of the air inlet channel is connected to the one-way valve.

10. A fish farming system, characterized in that: The invention comprises an automatic feeding device, an internal and external air pressure self-balancing device, an auxiliary oxygenation device, a heating device and a centrifugal pump-based filtering oxygenation device as described in any one of claims 1 to 9.

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