Filtering equipment and fish and vegetable symbiotic system

Abstract

The embodiment of the utility model provides filtering equipment and a fish and vegetable symbiotic system, the filtering equipment comprises a separation and precipitation chamber and a filtering device, the filtering device is located in the separation and precipitation chamber and divides the separation and precipitation chamber into an upper separation chamber and a lower separation chamber along the vertical direction, and the upper separation chamber is provided with a water outlet; the lower separation chamber is provided with a water inlet and a drain outlet located at the bottom of the lower separation chamber, and the drain outlet is used for discharging separated fish manure large particles. According to the sewage treatment device, the filtering device is arranged in the separation and precipitation chamber, the separation and precipitation chamber is divided into the upper separation chamber and the lower separation chamber in the vertical direction, the water inlet and the sewage outlet are formed in the lower separation chamber, the water outlet is formed in the upper separation chamber, sewage enters from the lower separation chamber, and large particles are isolated in the lower separation chamber through the filtering device; the sewage is discharged from the water outlet at the upper part along with the rising of the water level of the sewage, and large particles such as fish manure precipitated in the lower separation chamber are discharged through the sewage outlet, so that the particles in the sewage are separated, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aquaponics, and in particular to a filtering device and an aquaponics system. Background Art

[0002] Vertical flow separators are commonly used in aquaculture to perform preliminary separation of aquaculture wastewater. Their working principle is to use the difference in gravity and buoyancy of particles such as fish feces to achieve separation. However, under the condition of continuous water inflow and outflow, when the gravity and buoyancy of the particles are close and the impact force of the water flow is large, some large particles of fish feces will be discharged with the water flow and cannot settle to the bottom, resulting in insufficient separation of particles and affecting the subsequent water treatment effect. Utility Model Content

[0003] The present application provides a filtering device in an embodiment to solve the problem of insufficient separation of particles when separating aquaculture wastewater in existing aquaculture. The second purpose of the present application is to provide a fish-vegetable symbiosis system including the filtering device.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A filtering device, comprising:

[0006] A separation sedimentation chamber and a filtering device, wherein the filtering device is located in the separation sedimentation chamber and vertically divides the separation sedimentation chamber into an upper separation chamber and a lower separation chamber, and the upper separation chamber is provided with a water outlet;

[0007] The lower separation chamber is provided with a water inlet and a sewage outlet located at the bottom of the lower separation chamber, and the sewage outlet is used to discharge the separated large particles of fish feces.

[0008] Optionally, the bottom wall of the lower separation chamber is provided with a downwardly extending sewage collecting chamber, the diameter of the sewage collecting chamber gradually decreases from top to bottom in the vertical direction, and the sewage outlet is located at the lowest point of the sewage collecting chamber.

[0009] Optionally, it also includes:

[0010] A stirring device is located in the separation and sedimentation chamber, and one end of the stirring device is located at the sewage outlet. The stirring device is used to disturb the sewage at the sewage outlet.

[0011] Optionally, it also includes:

[0012] A water inlet pipeline, a power chamber and a connecting pipeline are arranged in sequence, the water inlet of the water inlet pipeline is connected to a water source, the water outlet of the water inlet pipeline is connected to the water inlet of the power chamber, the water outlet of the power chamber is connected to the water inlet of the connecting pipeline, and the water outlet of the connecting pipeline is connected to the water inlet of the separation sedimentation chamber;

[0013] The water outlet diameter of the water inlet pipeline is larger than the water inlet diameter of the power chamber; the water outlet diameter of the power chamber is smaller than the water inlet diameter of the connecting pipeline; the water outlet diameter of the connecting pipeline is smaller than the water inlet diameter of the separation and sedimentation chamber.

[0014] Optionally, it also includes:

[0015] A hydrodynamic device, located in the power chamber, for rotating under the action of hydrodynamic force to disturb the water flow in the power chamber;

[0016] The water power device is connected to the stirring device to provide power for the rotation of the stirring device.

[0017] Optionally, the water power device comprises:

[0018] A turbine and a turbine shaft, wherein the turbine shaft is rotatably connected to the center of the power chamber, the turbine is fixedly connected to the turbine shaft, and rotates under the drive of the water flow at the water inlet of the power chamber to disturb the sewage in the power chamber.

[0019] Optionally, the water power device further comprises:

[0020] A driving wheel is fixed to the top of the turbine shaft and rotates synchronously with the turbine;

[0021] A driven wheel and a driven rotating shaft, both of which are located in the separation and sedimentation chamber, the driven wheel is fixed on the driven rotating shaft, the driven rotating shaft is rotatably connected to the separation and sedimentation chamber and rotates around its own axis; the stirring device is fixed to the bottom of the driven rotating shaft;

[0022] The wheel connecting member has two ends respectively connected to the driving wheel and the driven wheel to transmit power from the driving wheel to the driven wheel.

[0023] Optionally, the water power device further comprises:

[0024] A rotating shaft fixing member has one end fixed to the side wall of the upper separation chamber and the other end fixed to the driven rotating shaft, and the driven rotating shaft can rotate relative to the rotating shaft fixing member.

[0025] Optionally, it also includes:

[0026] A water outlet pipeline is connected to the water outlet of the upper separation chamber, and the diameter of the water outlet pipeline is larger than the diameter of the water outlet of the upper separation chamber.

[0027] The filtering device provided in the embodiment of the present application includes: a separation and sedimentation chamber and a filtering device, wherein the filtering device is located in the separation and sedimentation chamber and vertically divides the separation and sedimentation chamber into an upper separation chamber and a lower separation chamber, wherein the upper separation chamber is provided with a water outlet; the lower separation chamber is provided with a water inlet and a sewage outlet located at the bottom of the lower separation chamber, wherein the sewage outlet is used to discharge large particles of fish feces after separation.

[0028] Compared with the prior art, the filtering device provided in the embodiment of the present application has the following technical effects:

[0029] In the present application, a filtering device is arranged in the separation sedimentation chamber, and the separation sedimentation chamber is vertically divided into an upper separation chamber and a lower separation chamber, wherein the water inlet and the sewage outlet are arranged in the lower separation chamber, and the water outlet is arranged in the upper separation chamber. Sewage enters from the lower separation chamber, and large particles are isolated in the lower separation chamber by the filtering device. As the water level rises as sewage flows in, the particles are discharged from the upper water outlet, and large particles such as fish feces precipitated in the lower separation chamber are discharged through the sewage outlet, thereby separating particles from the sewage and improving the sewage treatment effect.

[0030] In order to achieve the above-mentioned second purpose, the present application also provides a fish-vegetable symbiosis system, which includes any one of the above-mentioned filtering devices. Since the above-mentioned filtering device has the above-mentioned technical effects, the fish-vegetable symbiosis system with the filtering device should also have corresponding technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 A schematic diagram of the structure of a filtering device provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the installation structure of the water power device provided in the embodiment of the present application;

[0034] Figure 3 A schematic diagram of the installation structure of the water power device and the stirring device provided in the embodiment of the present application.

[0035] The following are marked in the accompanying drawings:

[0036] Filtering device 100;

[0037] Separation and sedimentation chamber 110, filtering device 120, stirring device 130, water inlet pipeline 140, power chamber 150, connecting pipeline 160, water power device 170, water outlet pipeline 180;

[0038] An upper separation chamber 111, a lower separation chamber 112, a sewage collecting chamber 113, a sewage outlet 114, and a water outlet 115;

[0039] The turbine 171 , the turbine shaft 172 , the driving wheel 173 , the driven wheel 174 , the driven rotating shaft 175 , the wheel connecting member 176 , and the rotating shaft fixing member 177 . DETAILED DESCRIPTION

[0040] The embodiment of the utility model discloses a filtering device to solve the problem of insufficient separation of particles when separating aquaculture wastewater in the existing aquaculture.

[0041] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0042] See also Figure 1-3 , Figure 1 A schematic diagram of the structure of a filtering device provided in an embodiment of the present application; Figure 2 A schematic diagram of the installation structure of the water power device provided in the embodiment of the present application; Figure 3 Schematic diagram of the installation structure of the water power device and the stirring device 130 provided in the embodiment of the present application.

[0043] In a specific embodiment, the filtering device 100 provided in the present application can be applied to the field of aquaculture, such as separating large particles of fish feces in a fish-vegetable symbiotic system. In other embodiments, it can also be applied to occasions where solid impurities and sewage need to be separated, and can be configured as needed. In this embodiment, the filtering device 100 is applied to a fish-vegetable symbiotic system as an example, and the filtering device 100 includes a separation sedimentation chamber 110 and a filtering device 120. The filtering device 120 is disposed in the separation sedimentation chamber 110, and the separation sedimentation chamber 110 is vertically divided into an upper separation chamber 111 and a lower separation chamber 112, preferably evenly divided in the vertical direction, or the vertical height of the lower separation chamber 112 is greater than the vertical height of the upper separation chamber 111, so that the sewage can be further precipitated during the spreading process from bottom to top. The filter device 120 can be configured as a grid, and its specific mesh size can be set according to the size of the required separated particles. The filter device 120 is fixed to the inner wall of the separation sedimentation chamber 110, preferably by welding or threaded connection, etc. The circumferential edge of the filter device 120 is preferably fixed to the inner wall of the separation sedimentation chamber 110 by welding.

[0044] The upper separation chamber 111 is provided with a water outlet 115, and the lower separation chamber 112 is provided with a water inlet, which is connected to the sewage source. Preferably, the water outlet 115 and the water inlet are provided on a set of side walls of the separation sedimentation chamber 110 that are arranged opposite to each other, so as to further extend the movement path of the sewage in the separation sedimentation chamber 110 and optimize the filtering effect; thus, the separation sedimentation chamber 110 can be provided as a rectangular parallelepiped structure or a cylindrical structure; the bottom of the lower separation chamber 112 is provided with a sewage outlet 114 for discharging the large particles of fish feces after separation; the sewage outlet 114 is a cylindrical structure, so that large particles such as fish feces can be further accumulated and precipitated and then discharged at the sewage outlet 114. In this embodiment, the separation sedimentation chamber 110 is described as a rectangular parallelepiped structure, which is composed of four vertical side walls connected in sequence and a conical groove bottom, and is provided with an openable groove cover, and the sewage outlet 114 is provided at the center of the conical groove bottom.

[0045] Compared with the prior art, the filtering device 100 provided in the embodiment of the present application has the following technical effects:

[0046] In the present application, a filtering device 120 is arranged in the separation sedimentation chamber 110, and the separation sedimentation chamber 110 is vertically divided into an upper separation chamber 111 and a lower separation chamber 112, wherein a water inlet and a sewage outlet 114 are arranged in the lower separation chamber 112, and a water outlet 115 is arranged in the upper separation chamber 111. Sewage enters from the lower separation chamber 112, and large particles are isolated in the lower separation chamber 112 by the filtering device 120. As the water level rises as sewage flows in, the large particles are discharged from the upper water outlet 115, and large particles such as fish feces precipitated in the lower separation chamber 112 are discharged through the sewage outlet 114, thereby separating particles from the sewage and improving the sewage treatment effect.

[0047] In order to further gather impurities such as fish feces at the bottom of the lower separation chamber 112, in some embodiments, the bottom wall of the lower separation chamber 112 is provided with a downwardly extending sewage collecting chamber 113, the diameter of the sewage collecting chamber 113 gradually decreases from top to bottom vertically, and the sewage outlet 114 is located at the lowest point of the sewage collecting chamber 113, and impurities such as fish feces are gathered at the sewage outlet 114 by gravity. The sewage collecting chamber 113 is preferably set to be funnel-shaped, and the sewage outlet 114 is set at the lowest point of the sewage collecting chamber 113. The lowest point can be set at the center of the horizontal projection of the sewage collecting chamber 113 to facilitate production and processing; at the same time, the center can reduce the influence of water flow fluctuations at the water outlet 115 and the water inlet at both ends, so as to facilitate the precipitation of impurities such as fish feces.

[0048] In order to prevent impurities such as fish feces at the sewage outlet 114 from clogging the sewage outlet 114, the above-mentioned filtering equipment 100 also includes a stirring device 130. The stirring device 130 can be independently connected to a power source to provide power. The stirring device 130 is located in the separation sedimentation chamber 110, preferably arranged at the sewage outlet 114 in the lower separation chamber 112, to stir impurities such as fish feces at the sewage outlet 114 to prevent clogging the sewage outlet 114. When the sewage outlet 114 is a cylindrical structure, the stirring device 130 can extend into the cylindrical structure to further improve the stirring effect.

[0049] In some embodiments, the above-mentioned filtering device 100 also includes a water inlet pipe 140, a power chamber 150 and a connecting pipe 160 which are arranged in sequence, the water inlet of the water inlet pipe 140 is connected to a water source, the water outlet of the water inlet pipe 140 is connected to the water inlet of the power chamber 150, the water outlet of the power chamber 150 is connected to the water inlet of the connecting pipe 160, and the water outlet of the connecting pipe 160 is connected to the water inlet of the separation and sedimentation chamber 110; the water outlet diameter of the water inlet pipe 140 is larger than the water inlet diameter of the power chamber 150; the water outlet diameter of the power chamber 150 is smaller than the water inlet diameter of the connecting pipe 160; the water outlet diameter of the connecting pipe 160 is smaller than the water inlet diameter of the separation and sedimentation chamber 110.

[0050] In order to further increase the kinetic energy of the water, the water outlet diameter of the water inlet pipe 140 is larger than the water inlet diameter of the power chamber 150, so that when the sewage enters the power chamber 150 from the water inlet pipe 140, the flow rate increases due to the reduction of the cross-sectional area, and the flow rate of the sewage entering the power chamber 150 is increased, which can increase the kinetic energy of the sewage entering the power chamber 150, and indirectly disturb the water flow in the power chamber 150, providing kinetic energy for the next step of entering the separation sedimentation chamber 110; the water outlet diameter of the power chamber 150 is smaller than the water inlet diameter of the connecting pipe 160, and the water outlet diameter of the connecting pipe 160 is smaller than the water inlet diameter of the separation sedimentation chamber 110. Through continuous diameter change, the flow rate of the sewage entering the separation sedimentation chamber 110 is reduced, and the disturbance of the sewage in the separation sedimentation chamber 110 is reduced, which is convenient for preventing the precipitation and separation of impurities such as fish feces. The structure of the power chamber 150 can also be set as a rectangular parallelepiped structure, specifically including four vertical side walls and a horizontal groove bottom connected in sequence, and an openable groove cover is provided.

[0051] Furthermore, the above-mentioned filtering device 100 also includes a hydrodynamic device 170, which is located in the power chamber 150 and rotates under the action of hydrodynamic force to disturb the water flow in the power chamber 150. The hydrodynamic device 170 is preferably arranged at a position relative to the water inlet of the power chamber 150, so that the water flow entering the power chamber 150 acts on the hydrodynamic device 170, converting the kinetic energy into the kinetic energy of the hydrodynamic device 170. At the same time, the hydrodynamic device 170 is connected to the stirring device 130 to provide a power source for the rotation of the stirring device 130, so as to provide power for the stirring device 130 through the sewage's own kinetic energy, without the need to connect an additional power supply, saving energy and reducing operating costs. At the same time, based on the caliber settings of the above-mentioned water inlet pipeline 140, power chamber 150 and connecting pipeline 160, the flow rate of the sewage entering the power chamber 150 is changed by changing the diameter, the dynamic potential energy is increased, the rotation speed of the hydrodynamic device 170 and the stirring device 130 is increased, the disturbance effect is improved, and the energy consumption is reduced.

[0052] In some embodiments, the hydrodynamic device 170 includes a turbine 171 and a turbine shaft 172, wherein the turbine shaft 172 is rotatably connected to the center of the power chamber 150 to evenly disturb the power chamber 150; the turbine shaft 172 can be rotatably connected to the power chamber 150 by providing a bearing. The turbine 171 is fixedly connected to the turbine shaft 172, and rotates under the drive of the water flow at the water inlet of the power chamber 150, disturbing the sewage in the power chamber 150, so that the sewage carrying large particles of fish feces can smoothly pass through the connecting pipe 160 and enter the separation sedimentation chamber 110, preventing blockage at the connecting pipe 160.

[0053] Furthermore, the hydrodynamic device 170 also includes a driving wheel 173, a driven wheel 174, a driven rotating shaft 175 and a wheel connecting member 176; the driving wheel 173 is fixed to the top of the turbine shaft 172 and can be fixed by a key. Driven by the turbine 171, the driving wheel 173 and the turbine shaft 172 rotate synchronously; the driven wheel 174 and the driven rotating shaft 175 are both located in the separation sedimentation chamber 110, the driven wheel 174 is fixed on the driven rotating shaft 175, the driven rotating shaft 175 is rotatably connected to the separation sedimentation chamber 110, and rotates around its own axis; the driven rotating shaft 175 is preferably arranged In the upper separation chamber 111, the stirring device 130 is fixed to the bottom of the driven rotating shaft 175, and rotates around the axis of the driven rotating shaft 175 driven by the driven wheel 174; in order to realize the transmission of power between the driving wheel 173 and the driven wheel 174, a wheel connecting member 176 is arranged between the two to transmit the power from the driving wheel 173 to the driven wheel 174; the wheel connecting member 176 can be arranged as a belt or a chain, etc., and can be arranged as needed; in this embodiment, it is preferably arranged as a chain, and the driving wheel 173 and the driven wheel 174 are preferably arranged as gears to make the power transmission more stable and prevent slipping. In order to install the wheel connecting member 176 between the power chamber 150 and the separation sedimentation chamber 110, installation notches are respectively set on a group of adjacent side walls of the power chamber 150 and the separation sedimentation chamber 110, and the wheel connecting member 176 passes through the installation notches on the side walls of the power chamber 150 and the separation sedimentation chamber 110 respectively. At the same time, the installation notch is vertically higher than the top edge of the water outlet 115 of the separation sedimentation chamber 110 to prevent sewage from overflowing.

[0054] In order to fix the driven rotating shaft 175 in the separation sedimentation chamber 110, the above-mentioned hydrodynamic device 170 also includes a rotating shaft fixing part 177, one end of which is fixed to the side wall of the upper separation chamber 111, and the other end is fixed to the driven rotating shaft 175, such as by using a sleeve or a bearing, so that the driven rotating shaft 175 can rotate relative to the rotating shaft fixing part 177, and at the same time, the relative position of the driven rotating shaft 175 and the upper separation chamber 111 remains stationary.

[0055] In some embodiments, the above-mentioned filtration device 100 also includes a water outlet pipe 180, which is connected to the water outlet 115 of the upper separation chamber 111. The diameter of the water outlet pipe 180 is larger than the diameter of the water outlet 115 of the upper separation chamber 111, so that the outlet water of the upper separation chamber 111 enters the next sewage treatment station at a certain flow rate, providing sufficient kinetic energy for the flow of sewage in the system, reducing the energy consumption of the entire sewage treatment system, and reducing operating costs.

[0056] The specific working process includes: the sewage discharged from the breeding pond flows through the water inlet pipe 140 at a certain flow rate, flows into the power chamber 150 from the water inlet pipe 140, and enters the separation sedimentation chamber 110 through the connecting pipe 160. Since the diameter of the water inlet of the power chamber 150 is smaller than the diameter of the connecting pipe 160 and the diameter of the water inlet of the separation sedimentation chamber 110, the sewage flow rate is reduced to facilitate sedimentation and separation. The sewage containing smaller particles such as fish feces flows through the grille and flows out through the water outlet pipe 180. The grille prevents large particles such as fish feces from floating up, and the fish feces are not allowed to float. Large particles such as feces gradually settle to the bottom of the conical trough under the gravity and buoyancy difference and are discharged from the sewage outlet 114; because the diameter of the water inlet pipe 140 is larger than the diameter of the water inlet of the power chamber 150, the sewage flow rate is accelerated, and the sewage drives the turbine 171 to rotate, thereby driving the turbine shaft 172 and the driving wheel 173 to rotate, and the driving wheel 173 drives the wheel connector 176 to rotate, further driving the driven wheel 174, the driven rotating shaft 175 and the stirring device 130 to rotate, so that the sewage outlet remains unobstructed and is not blocked by large particles such as fish feces. Sewage containing smaller particles such as fish feces flows through the grille and flows out through the water outlet pipe 180, and can be further treated; large particles such as fish feces are discharged from the sewage outlet and can be fermented.

[0057] The above equipment separates and precipitates large particles such as fish feces, and uses water flow power to solve the problem of large particles such as fish feces blocking the sewage outlet 114, without requiring additional energy consumption, and is environmentally friendly.

[0058] Based on the filtering device 100 provided in the above embodiments, the present application also provides a fish-vegetable symbiosis system, which includes any one of the filtering devices 100 in the above embodiments. Since the fish-vegetable symbiosis system adopts the filtering device 100 in the above embodiments, please refer to the above embodiments for the beneficial effects of the fish-vegetable symbiosis system.

[0059] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A filtering device, characterized in that: include: A separation sedimentation chamber and a filtering device, wherein the filtering device is located in the separation sedimentation chamber and vertically divides the separation sedimentation chamber into an upper separation chamber and a lower separation chamber, and the upper separation chamber is provided with a water outlet; The lower separation chamber is provided with a water inlet and a sewage outlet located at the bottom of the lower separation chamber, and the sewage outlet is used to discharge the separated large particles of fish feces.

2. The filtering device according to claim 1, characterized in that The bottom wall of the lower separation chamber is provided with a dirt collecting cavity extending downward, the diameter of the dirt collecting cavity gradually decreases from top to bottom in the vertical direction, and the dirt discharge port is located at the lowest point of the dirt collecting cavity.

3. The filtering device according to claim 2, characterized in that Also includes: A stirring device is located in the separation and sedimentation chamber, and one end of the stirring device is located at the sewage outlet. The stirring device is used to disturb the sewage at the sewage outlet.

4. The filtering device according to claim 3, characterized in that Also includes: A water inlet pipeline, a power chamber and a connecting pipeline are arranged in sequence, the water inlet of the water inlet pipeline is connected to a water source, the water outlet of the water inlet pipeline is connected to the water inlet of the power chamber, the water outlet of the power chamber is connected to the water inlet of the connecting pipeline, and the water outlet of the connecting pipeline is connected to the water inlet of the separation sedimentation chamber; The water outlet diameter of the water inlet pipeline is larger than the water inlet diameter of the power chamber; the water outlet diameter of the power chamber is smaller than the water inlet diameter of the connecting pipeline; the water outlet diameter of the connecting pipeline is smaller than the water inlet diameter of the separation and sedimentation chamber.

5. The filtering device according to claim 4, characterized in that Also includes: A hydrodynamic device, located in the power chamber, for rotating under the action of hydrodynamic force to disturb the water flow in the power chamber; The water power device is connected to the stirring device to provide power for the rotation of the stirring device.

6. The filtering device according to claim 5, characterized in that The water power device comprises: A turbine and a turbine shaft, wherein the turbine shaft is rotatably connected to the center of the power chamber, the turbine is fixedly connected to the turbine shaft, and rotates under the drive of the water flow at the water inlet of the power chamber to disturb the sewage in the power chamber.

7. The filtering device according to claim 6, characterized in that The water power device also includes: A driving wheel is fixed to the top of the turbine shaft and rotates synchronously with the turbine; A driven wheel and a driven rotating shaft, both of which are located in the separation and sedimentation chamber, the driven wheel is fixed on the driven rotating shaft, the driven rotating shaft is rotatably connected to the separation and sedimentation chamber and rotates around its own axis; the stirring device is fixed to the bottom of the driven rotating shaft; The wheel connecting member has two ends respectively connected to the driving wheel and the driven wheel to transmit power from the driving wheel to the driven wheel.

8. The filtering device according to claim 7, characterized in that The water power device also includes: A rotating shaft fixing member has one end fixed to the side wall of the upper separation chamber and the other end fixed to the driven rotating shaft, and the driven rotating shaft can rotate relative to the rotating shaft fixing member.

9. The filtering device according to claim 1, characterized in that Also includes: A water outlet pipeline is connected to the water outlet of the upper separation chamber, and the diameter of the water outlet pipeline is larger than the diameter of the water outlet of the upper separation chamber.

10. A fish-vegetable symbiotic system, characterized in that: The filter device comprises the filter device according to any one of claims 1 to 9.

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