Circulating filtration equipment for aquaculture

Abstract

The invention relates to the technical field of aquaculture devices, in particular to circulating filtration equipment for aquaculture, the circulating filtration equipment for aquaculture comprises a machine shell, end discs, end rings, a filter screen, a backflushing mechanism, a collecting mechanism and a plurality of supporting rods, and the end discs and the end rings are coaxially arranged at intervals and can rotate around the axes of the end discs and the end rings; the filter screen is of an annular structure, the filter screen and the end disc are coaxially arranged, and the two ends of the filter screen are arranged on the end disc and the end ring respectively; the back flushing mechanism is used for flushing impurities adhered to the filter screen; the collecting mechanism is used for collecting impurities falling from the filter screen; the supporting rods are of a wave-shaped structure, the two ends of each supporting rod are arranged on the end disc and the end ring correspondingly, the multiple supporting rods are arranged at intervals in the circumferential direction and divided into two sets, and the two sets of supporting rods are located on the two sides of the filter screen correspondingly, so that the filter screen is of a wave-shaped structure. During filtering, the relatively outwards concave part on the inner side of the filter screen can contain impurities, so that the impurities returning to the bottom of the filter screen can be reduced, and the filtering efficiency is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of aquaculture devices, and particularly to a circulating filtration device for aquaculture. Background Art

[0002] Aquaculture is an activity of raising aquatic organisms in a controllable environment in an artificial way, aiming to increase the output of aquatic products, meet the human demand for aquatic products, and at the same time reduce the dependence on wild fish resources.

[0003] During the entire aquaculture process, it is crucial to maintain the cleanliness and stability of the aquaculture water, and the key link lies in effectively filtering impurities such as fish feces and residual bait in the aquaculture water; among many existing filtering devices, the drum microfilter has been widely used due to its advantages such as high filtering ability, strong operation stability, long-term continuous operation, infrequent maintenance, and simple operation.

[0004] When the drum microfilter operates, the aquaculture water flows into the drum structure along the axial direction and flows out through the filter net along the radial direction. The impurities contained therein will be intercepted on the inner surface of the filter net and rotate to the top with the rotation of the drum structure, and then fall into the collection device under the action of its own gravity and external water flow scouring, realizing the discharge of impurities.

[0005] However, the existing drum microfilter also has some problems in actual use: since the filter net is tightly coated on the drum structure, when the drum structure rotates, some impurity particles adhering to the filter net are affected by factors such as centrifugal force and the smoothness of the filter net surface, and are likely to slide along the filter net back to the bottom area of the drum structure. These sliding impurity particles will re-mix into the aquaculture water to be filtered, resulting in repeated filtration, which not only increases the operation burden of the equipment but also affects the overall filtration efficiency. Summary of the Invention

[0006] Based on this, it is necessary to provide a circulating filtration device for aquaculture in view of the problem of low filtration efficiency existing in the current drum microfilter during use.

[0007] The above object is achieved by the following technical solutions: A circulating filtration device for aquaculture, the circulating filtration device for aquaculture includes: A housing having a filtration chamber; An end plate inserted into the filtration chamber and capable of rotating about its own axis; An end ring inserted into the filtration chamber, coaxially arranged with the end plate, and axially spaced from the end plate, and the end ring is capable of rotating about its own axis; A filter screen, which is inserted into the filter cavity. The filter screen is of an annular structure and is coaxially arranged with the end plate. One end of the filter screen is hermetically arranged on the end plate, and the other end is arranged on the end ring; A plurality of support rods, all of which are inserted into the filter cavity. The support rods extend along a direction parallel to the axis of the end plate. The support rods are of a wavy structure. Two ends of the support rods are respectively arranged on the end plate and the end ring. The plurality of support rods are divided into two groups, and the two groups of support rods are alternately and spaced apart in the circumferential direction and jointly clamp on both sides of the filter screen. The support rods located inside the filter screen are arranged more outward in the radial direction than the support rods located outside the filter screen; A backwashing mechanism, which is configured to be able to wash the impurities adhered to the filter screen; A collection mechanism, which is configured to be able to collect the impurities falling from the filter screen.

[0008] Further, the backwashing mechanism includes a water inlet pipe and a plurality of nozzles. The water inlet pipe is inserted into the filter cavity and is located outside the filter screen. The water inlet pipe is configured to be able to receive water from the outside. The axis of the water inlet pipe is parallel to the axis of the end plate; the nozzles are arranged on the water inlet pipe and are communicated with the water inlet pipe and point to the filter screen. The plurality of nozzles are spaced apart along the axis of the water inlet pipe.

[0009] Further, the nozzle has a conical nozzle.

[0010] Further, the spraying points of the nozzles are located at the relatively outwardly convex parts outside the filter screen.

[0011] Further, the spraying direction of the nozzles is perpendicular to the side wall located at the rear in the rotation direction of the relatively outwardly convex part outside the filter screen.

[0012] Further, the collection mechanism includes a collection part. The collection part is of a strip structure and is inserted into the filter cavity and is located inside the filter screen. The collection part is parallel to the axis of the end plate. The cross-sectional shape of the collection part is U-shaped, and the opening of the collection part faces the nozzles.

[0013] Further, the machine shell also has a water storage cavity, which is communicated with the filter cavity and is configured to be able to introduce the aquaculture water into the inside of the filter screen; the aquaculture water circulating filtration device further includes a suction member, which is configured to be able to suck the aquaculture water into the water storage cavity.

[0014] Further, the suction member is a water pump.

[0015] Furthermore, the circulating filtration device for aquaculture further includes a driving member configured to provide a driving force for the rotation of the end plate.

[0016] Furthermore, the driving member is a driving motor.

[0017] The beneficial effects of the present invention are as follows: During the use of the circulating filtration device for aquaculture provided by the present invention, first, the end plate is driven to rotate. The end plate synchronously drives the filter net to rotate through the support rod and the end ring. Then, aquaculture water is added into the filter net. The liquid in the aquaculture water flows out after being filtered by the filter net. The solid impurities in the aquaculture water are intercepted on the inner surface of the filter net and stay at the relatively concave part on the inner side of the filter net. Subsequently, they synchronously rotate with the filter net to a preset position, and then are washed away by the backwashing mechanism and collected by the collection mechanism. By setting the filter net to form a special wave structure, the situation where solid impurities slide back into the unfiltered aquaculture water can be reduced, thereby reducing repeated filtration while ensuring the filtration efficiency.

[0018] Furthermore, by setting the spray head to have a conical nozzle and the spray point of the spray head to be located at the relatively convex part on the outer side of the filter net, taking advantage of the characteristics that the pressure in the middle of the conical water flow sprayed by the conical nozzle is large and the pressure around it is small, it adapts to the situation where more impurities accumulate at the relatively concave part on the inner side of the filter net and fewer impurities accumulate at the relatively convex part on the inner side of the filter net, ensuring the flushing effect.

[0019] Furthermore, by setting the spraying direction of the spray head to be perpendicular to the side wall of the relatively convex part on the outer side of the filter net along the rotation direction at the rear, during the filtration process, the water sprayed from the spray head has a large flushing force and a long flushing time on the relatively convex part on the outer side of the filter net, adapting to the situation where more impurities accumulate at the relatively concave part on the inner side of the filter net. The water sprayed from the spray head has a small flushing force and a short flushing time on the relatively concave part on the outer side of the filter net, adapting to the situation where fewer impurities accumulate at the relatively convex part on the inner side of the filter net, ensuring the flushing effect. At the same time, since there is an angle between the water sprayed from the spray head and the relatively concave part on the outer side of the filter net, the water hitting the relatively concave part on the outer side of the filter net can splash onto the relatively convex part on the outer side of the filter net, thereby realizing secondary flushing of the relatively concave part on the inner side of the filter net and improving the cleaning effect. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the circulating filtration device for aquaculture provided by an embodiment of the present invention; Figure 2 is a three-dimensional sectional structural schematic of the circulating filtration device for aquaculture provided by an embodiment of the present invention Figure 1 ; Figure 3 isFigure 2 Schematic diagram of the partial enlarged structure at location A in Figure 4 Schematic cross-sectional structure diagram of the circulating filtration device for aquaculture provided by the embodiment of the present invention; Figure 5 is Figure 4 Schematic diagram of the partial enlarged structure at location B in Figure 6 is Figure 4 Schematic diagram of the partial enlarged structure at location C in Figure 7 Stereoscopic cross-sectional structure schematic of the circulating filtration device for aquaculture provided by the embodiment of the present invention Figure 2 ; Figure 8 is Figure 7 Schematic diagram of the partial enlarged structure at location D in

[0021] Wherein: 1. Housing; 101. Filtration chamber; 102. Water storage chamber; 103. Water storage tank; 104. Circulation hole; 2. End plate; 3. End ring; 4. Filter net; 401. Relatively outwardly convex part on the outer side of the filter net; 402. Relatively inwardly concave part on the outer side of the filter net; 403. Relatively outwardly concave part on the inner side of the filter net; 404. Relatively inwardly convex part on the inner side of the filter net; 5. Support rod; 6. Backwashing mechanism; 601. Water inlet pipe; 602. Sprinkler head; 7. Collection mechanism; 701. Collection part; 8. Water pump; 9. Driving motor. Detailed implementation manners

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. And the terms "connection" and "coupling" mentioned herein, unless otherwise specified, both include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0024] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0025] As Figures 1 to 8 shown, the circulating filtration device for aquaculture provided by the embodiment of the present invention is used for circulating and filtering aquaculture water, and is configured to include a casing 1, an end plate 2, an end ring 3, a filter net 4, a plurality of support rods 5, a backwashing mechanism 6 and a collection mechanism 7. Among them, the casing 1 has a filtration chamber 101; the end plate 2 is inserted into the filtration chamber 101 and can rotate around its own axis; the end ring 3 is inserted into the filtration chamber 101, is coaxially arranged with the end plate 2, and is arranged at an axial interval with the end plate 2, and the end ring 3 can rotate around its own axis; the filter net 4 is inserted into the filtration chamber 101, the filter net 4 is of an annular structure, and is coaxially arranged with the end plate 2. One end of the filter net 4 is hermetically arranged on the end plate 2, and the other end is arranged on the end ring 3; a plurality of support rods 5 are all inserted into the filtration chamber 101, the support rods 5 extend along a direction parallel to the axis of the end plate 2, the support rods 5 are of a wavy structure, and both ends of the support rods 5 are respectively arranged on the end plate 2 and the end ring 3. The plurality of support rods 5 are divided into two groups, and the two groups of support rods 5 are alternately and spaced apart in the circumferential direction and jointly clamp both sides of the filter net 4. The support rods 5 located inside the filter net 4 are arranged more outward in the radial direction than the support rods 5 located outside the filter net 4; the backwashing mechanism 6 is configured to be able to wash the impurities adhered to the filter net 4; the collection mechanism 7 is configured to be able to collect the impurities falling from the filter net 4.

[0026] Specifically in this embodiment, the casing 1 is a box structure with an open top, and the filtration chamber 101 is formed inside the casing 1. The axis of the end plate 2 is horizontally arranged, extends along the left-right direction, and is close to the left side wall of the casing 1. The axis of the end ring 3 is horizontally arranged and extends along the left-right direction. The end ring 3 is rotatably arranged on the right inner side wall of the casing 1 during installation. The axis of the filter net 4 is horizontally arranged and extends along the left-right direction. When installed, the left end of the filter net 4 is hermetically arranged on the right disk surface of the end plate 2, and the right end is arranged on the left end surface of the end ring 3. The support rods 5 are horizontally arranged and extend along the left-right direction. When installed, the left end of the support rods 5 is arranged on the right disk surface of the end plate 2, and the right end is arranged on the left end surface of the end ring 3. The shapes formed by the ends of all the support rods 5 on the end plate 2 and the end ring 3 are all annular wavy lines, ensuring that the filter net 4 can form a wavy structure under the constraint of the support rods 5.

[0027] Specifically, under the constraint of the support rod 5, as Figure 6 shown, on the outer side of the filter net 4, relatively outwardly convex portions 401 and relatively inwardly concave portions 402 of the outer side of the filter net are alternately arranged circumferentially. On the inner side of the filter net 4, relatively outwardly concave portions 403 and relatively inwardly convex portions 404 of the inner side of the filter net are alternately arranged circumferentially. Thus, when the filter net 4 rotates, the relatively outwardly concave portion 403 on the inner side of the filter net realizes the collection and storage of impurities.

[0028] Optionally, the filter net 4 can be set as a mesh structure made of stainless steel. The filter net 4 made of stainless steel not only has excellent corrosion resistance during use, can effectively resist the erosion of various chemical substances and microorganisms in the aquaculture water, ensure that the structural integrity and filtration performance of the filter net 4 are not affected under long-term complex use environments, but also has high strength characteristics, enabling the filter net 4 to maintain a stable shape and not easily deform during the pressure impact of the aquaculture water and the frequent adhesion and cleaning of impurities, providing a solid guarantee for stable and efficient filtration operations.

[0029] During the use process, first drive the end plate 2 to rotate. The end plate 2 synchronously drives the filter net 4 to rotate through the support rod 5 and the end ring 3. Then, add aquaculture water into the filter net 4. After the aquaculture water enters the internal space of the filter net 4, filtration operations start under the coordination of various physical forces: on the one hand, under the action of the pressure difference existing on both sides of the filter net 4, the liquid part of the aquaculture water can smoothly pass through the mesh holes of the filter net 4; on the other hand, the centrifugal force generated when the filter net 4 rotates further promotes the rapid separation and outflow of the liquid.

[0030] Meanwhile, various solid impurities contained in the aquaculture water, due to their sizes being larger than the mesh holes of the filter net 4, cannot pass through the filter net 4, and thus are effectively intercepted on the inner surface of the filter net 4. Under the combined influence of gravity and the dynamic impact force of water flow, these intercepted impurities will move along the trend and concentrate and stay at the relatively outwardly concave portion 403 on the inner side of the filter net. The reason why the impurities concentrate in these areas is that when the filter net 4 rotates, the relatively outwardly concave portion 403 on the inner side of the filter net can provide a relatively stable staying space for the impurities, reducing the possibility of the impurities sliding randomly on the filter net 4 or being mixed into the water flow again.

[0031] With the continuous rotation of the filter net 4, the impurities intercepted and staying at the relatively outwardly concave portion 403 on the inner side of the filter net will gradually rotate to a preset position following the filter net 4, and then be washed away by the backwashing mechanism 6 and collected by the collection mechanism 7.

[0032] In the above - mentioned way, it is possible to greatly reduce the situation where impurities slide back to the bottom of the filter net 4 along the inner peripheral wall of the filter net 4 and re - mix into the aquaculture water to be filtered, while reducing the operation burden of the equipment caused by repeated filtration and ensuring the filtration efficiency.

[0033] Furthermore, the back - flushing mechanism 6 is arranged to include a water inlet pipe 601 and a plurality of nozzles 602. The water inlet pipe 601 is inserted into the filtration chamber 101 and is located outside the filter net 4. The water inlet pipe 601 is configured to receive water from the outside. The axis of the water inlet pipe 601 is parallel to the axis of the end plate 2. The nozzles 602 are arranged on the water inlet pipe 601, communicate with the water inlet pipe 601, and point to the filter net 4. The plurality of nozzles 602 are arranged at intervals along the axial direction of the water inlet pipe 601.

[0034] Specifically, the axis of the water inlet pipe 601 is horizontally arranged, extends along the left - right direction, and is located directly above the filter net 4. When installed, the left end of the water inlet pipe 601 is close to the end plate 2, and the right end penetrates through the right side wall of the machine housing 1.

[0035] During use, water from the outside is introduced into the water inlet pipe 601, and then the water is sprayed out through the nozzles 602, and the filter net 4 is flushed from the outside to the inside.

[0036] In a further embodiment, the nozzle 602 is provided with a conical nozzle. In this way, when flushing the filter net 4, the water sprayed out from the conical nozzle will form a specific high - pressure conical jet. Due to the conical structure of the nozzle, when the jet is close to the surface of the filter net 4, a focusing effect will occur, making the impact force of the water more concentrated, and it can efficiently peel off impurities, dirt, etc. attached to the filter net 4 from the pores and surface of the filter net. Moreover, the coverage area of the conical jet presents a specific conical region, which can more precisely match the shape and size of the filter net 4, ensuring that all parts of the filter net 4 can be fully and evenly flushed during the flushing process, thereby greatly improving the flushing effect and efficiency of the filter net 4 and ensuring that the filter net 4 has a stable filtration performance during long - term use.

[0037] In a further embodiment, due to the special wave structure of the filter net 4, the impurities accumulated at the relatively concave part 403 on the inner side of the filter net along the axial direction are more than those accumulated at the relatively convex part 404 on the inner side of the filter net. To better match the uneven distribution of impurities, the spraying points of the nozzles 602 are arranged at the relatively convex part 401 on the outside of the filter net.

[0038] Specifically in this embodiment, the water flow ejected from the conical nozzle presents a unique conical shape, which endows the water flow with special pressure distribution characteristics, that is, the pressure in the middle of the water flow is large and the pressure around is small. The impurities accumulated at the relatively concave part 403 inside the filter net are relatively dense, resulting in a large adhesion force between the impurities and the filter net 4 and a large interaction force between the impurities. Impacting the relatively convex part 401 on the outer side of the filter net through the middle of the conical water flow can provide sufficient impact energy to ensure that the impurities can quickly detach from the filter net 4 and guarantee the flushing effect.

[0039] Meanwhile, the part with relatively small pressure around the conical water flow also plays an important role. On the one hand, it can provide sufficient impact energy for the impurities accumulated at the relatively convex part 404 inside the filter net. On the other hand, it can create an auxiliary water flow environment around the impact area and play a certain role in flushing and cleaning the tiny impurities that may remain around the main impact area, preventing these tiny impurities from being missed during the main impact process, further improving the comprehensiveness of impurity cleaning. At the same time, the water flow with relatively small pressure around can play a role in guiding and converging the impurities that have been washed away from the filter net 4 by the high-pressure water flow in the middle. Under the action of these surrounding water flows, the detached impurities can move more smoothly in the direction of the collection mechanism 7, reducing the possibility of the impurities splashing around or reattaching to the surrounding components after detaching from the filter net 4, greatly improving the efficiency and effect of impurity cleaning.

[0040] In other embodiments, the existing nozzle 602 is generally arranged vertically downward, resulting in the same flushing force and flushing time of the water flow ejected by it on the filter net 4, and thus it is easy to occur that the position with more impurities accumulated on the filter net 4 is under-flushed and the position with less impurities accumulated on the filter net 4 is over-flushed. To better match the uneven distribution of impurities, the spraying direction of the nozzle 602 is set to be perpendicular to the side wall located at the rear along the rotation direction of the relatively convex part 401 on the outer side of the filter net.

[0041] Specifically in this embodiment, when the filter net 4 rotates clockwise, as Figure 6 shown, under the combined influence of gravity and the dynamic impact force of water flow, these intercepted impurities will move along the trend and concentrate and stay at the relatively concave part 403 inside the filter net; as Figure 5As shown, the inner side of the filter screen below the nozzle 602 is relatively concave at the part 403, which is located at the rear side in the rotation direction. By setting the spraying direction of the nozzle 602 perpendicular to the side wall of the relatively convex part 401 on the outer side of the filter screen that is located at the rear side in the rotation direction, during the filtering process, since the spraying direction of the nozzle 602 is perpendicular to the side wall of the relatively convex part 401 on the outer side of the filter screen at the rear side in the rotation direction, the high-pressure water flow ejected from the nozzle 602 can directly act on this part with the maximum impact force. This vertical impact method enables the washing force of the water flow on the relatively convex part 401 on the outer side of the filter screen to reach the maximum. At the same time, because of the vertical spraying, the water flow can continuously act on this part for a long time, thus ensuring sufficient and effective washing of a large amount of impurities accumulated in the relatively concave part 403 on the inner side of the filter screen corresponding to the relatively convex part 401 on the outer side of the filter screen, greatly improving the cleaning effect on the impurity-dense area.

[0042] Correspondingly, when the water flow is sprayed onto the relatively concave part 402 on the outer side of the filter screen, due to the specific setting of the spraying direction of the nozzle 602, the water flow is not perpendicular to this part but has a certain angle. This angle makes the washing force of the water flow on the relatively concave part 402 on the outer side of the filter screen significantly smaller than that on the relatively convex part, and the acting time is also correspondingly shortened. This just adapts to the situation where less impurities are accumulated in the relatively convex part 404 on the inner side of the filter screen, avoiding over-washing of the area with less impurities, and thus realizing the reasonable utilization of water resources and washing energy while ensuring the washing effect.

[0043] More ingeniously, due to the angle between the water ejected from the nozzle 602 and the relatively concave part 402 on the outer side of the filter screen, when the water flow impacts the relatively concave part 402 on the outer side of the filter screen, the water flow will generate a splashing phenomenon due to the impact. These splashing water flows can then splash onto the relatively convex part 401 on the outer side of the filter screen. As mentioned above, the relatively concave part on the inner side corresponding to the relatively convex part 401 on the outer side of the filter screen is the area where a large amount of impurities gather. Therefore, this splashing water flow realizes secondary washing of the relatively concave part 403 on the inner side of the filter screen.

[0044] In other embodiments, the collection mechanism 7 is set to include a collection part 701. The collection part 701 is in a strip structure and is inserted into the filtering cavity 101 and is located inside the filter screen 4. The axis of the collection part 701 is parallel to that of the end plate 2. The cross-sectional shape of the collection part 701 is U-shaped, and the opening of the collection part 701 faces the nozzle 602.

[0045] Specifically in this embodiment, the collection part 701 extends horizontally in the left-right direction and is located directly below the filter screen 4. When installed, the left end of the collection part 701 is close to the end plate 2, and the right end penetrates through the right side wall of the machine housing 1.

[0046] During use, the impurities washed off from the filter screen 4 can fall into the collection part 701 under the action of gravity to achieve collection.

[0047] In some other embodiments, it is set that the housing 1 further has a water storage cavity 102, the water storage cavity 102 is communicated with the filtration cavity 101, and is configured to be able to introduce the aquaculture water to the inner side of the filter screen 4; the aquaculture circulating filtration device further includes a suction member, and the suction member is configured to be able to suck the aquaculture water into the water storage cavity 102.

[0048] Specifically in this embodiment, a water storage tank 103 with an open top is arranged at the right side wall of the housing 1, and the water storage cavity 102 is formed inside the water storage tank 103. A circulation hole 104 is opened at the right side wall of the housing 1, and the circulation hole 104 communicates the water storage cavity 102 and the filtration cavity 101. The suction member is a water pump 8, and is installed at the front side wall of the water storage tank 103.

[0049] During use, when the water pump 8 is started, the water pump 8 continuously sucks the aquaculture water into the water storage cavity 102, and then the aquaculture water enters the inside of the filter screen 4 through the circulation hole 104 for filtration.

[0050] In some other embodiments, it is set that the aquaculture circulating filtration device further includes a driving member, and the driving member is configured to be able to provide the driving force for the rotation of the end plate 2.

[0051] Specifically in this embodiment, the driving member is a driving motor 9, the driving motor 9 is installed on the left outer side wall of the housing 1, the motor shaft of the driving motor 9 is arranged towards the right, and penetrates through the left side wall of the housing 1 and is fixedly inserted on the end plate 2.

[0052] During use, when the driving motor 9 is started, the driving motor 9 drives the end plate 2 to rotate, and the end plate 2 drives the filter screen 4 to rotate through the support rod 5 and the end ring 3.

[0053] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope recorded in this specification.

[0054] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A circulating filtration device for aquaculture, characterized in that, The circulating filtration equipment for aquaculture comprises: a casing having a filtration chamber; an end plate inserted into the filtration chamber and capable of rotating about its own axis; an end ring inserted into the filtration chamber, coaxially arranged with the end plate, and axially spaced from the end plate, the end ring being capable of rotating about its own axis; a filter net inserted into the filtration chamber, the filter net being of an annular structure and coaxially arranged with the end plate, one end of the filter net being hermetically arranged on the end plate and the other end being arranged on the end ring; a plurality of support rods, all inserted into the filtration chamber, the support rods extending in a direction parallel to the axis of the end plate, the support rods being of a wavy structure, both ends of the support rods being respectively arranged on the end plate and the end ring, the plurality of support rods being divided into two groups, the two groups of support rods being alternately and spaced circumferentially and jointly clamping both sides of the filter net, the support rods located inside the filter net being arranged further outwards in the radial direction than the support rods located outside the filter net; a backwashing mechanism configured to be able to wash the impurities adhered to the filter net; a collection mechanism configured to be able to collect the impurities falling from the filter net.

2. The circulating filtration equipment for aquaculture according to claim 1, wherein The backwashing mechanism includes a water inlet pipe and a plurality of nozzles. The water inlet pipe is inserted into the filtration chamber and located outside the filter net. The water inlet pipe is configured to be able to receive water from the outside, and the axis of the water inlet pipe is parallel to the axis of the end plate. The nozzles are arranged on the water inlet pipe, communicated with the water inlet pipe, and directed towards the filter net, and the plurality of nozzles are spaced along the axis direction of the water inlet pipe.

3. The circulating filtration equipment for aquaculture according to claim 2, characterized in that, The nozzle has a conical nozzle.

4. The circulating filtration equipment for aquaculture according to claim 3, characterized in that, The spraying point of the nozzle is located at the relatively outwardly convex part outside the filter net.

5. The circulating filtration device for aquaculture according to claim 2, wherein, The spraying direction of the nozzle is perpendicularly arranged with respect to the side wall located at the rear in the rotation direction of the relatively outwardly convex part outside the filter net.

6. The circulating filtration equipment for aquaculture according to claim 2, wherein The collection mechanism includes a collection part which is of a strip-shaped structure, inserted into the filtration chamber and located inside the filter net, the collection part being parallel to the axis of the end plate, the cross-sectional shape of the collection part being U-shaped, and the opening of the collection part being directed towards the nozzle.

7. The circulating filtration equipment for aquaculture according to claim 1, characterized in that, The casing further has a water storage chamber which is communicated with the filtration chamber and configured to be able to introduce the aquaculture water into the inside of the filter net. The circulating filtration equipment for aquaculture further includes a suction member configured to be able to suck the aquaculture water into the water storage chamber.

8. The circulating filtration equipment for aquaculture according to claim 7, characterized in that, The suction member is a water pump.

9. The circulating filtration equipment for aquaculture according to claim 1, characterized in that, The circulating filtration equipment for aquaculture further includes a driving member configured to be able to provide the driving force for the rotation of the end plate.

10. The circulating filtration equipment for aquaculture according to claim 9, characterized in that, The driving member is a driving motor.

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