Multi-stage filtering device of recirculating aquaculture system

Abstract

The utility model relates to the technical field of recirculating aquaculture, in particular to a multi-stage filtering device of a recirculating aquaculture system, which comprises an aquaculture tank and further comprises a driving box fixedly mounted on the side wall of the aquaculture tank; the water pump is arranged in the driving box, a water inlet of the water pump is communicated with the culture tank through a water inlet pipe, and a water outlet of the water pump is connected with a water outlet pipe and a first water guide pipe; the mounting frame is fixedly connected to the side wall of the culture tank, the end part of the mounting frame is fixedly connected with a first filter box and a second filter box, extended flow guide pipes are arranged in the first filter box and the second filter box, and a plurality of water outlet holes are formed in the surfaces of the extended flow guide pipes at equal intervals; by arranging the two stages of filter cartridges and utilizing the water pump to sequentially introduce culture water for filtration, multi-stage filtration is realized, the filtration efficiency and precision are improved, and impurities with different sizes in water can be effectively removed.

Description

Technical Field

[0001] This utility model relates to the field of recirculating aquaculture technology, and in particular to a multi-stage filtration device for a recirculating aquaculture system. Background Technology

[0002] In recirculating aquaculture systems, stable and purified water quality is crucial for the healthy growth of cultured organisms. Existing recirculating aquaculture systems typically employ various filtration devices to remove solid particles and organic matter from the water.

[0003] However, many traditional filtration devices lack effective self-cleaning capabilities during the filtration process. As filtration continues, impurities in the water gradually adhere to and accumulate on the surface of the filter screen or filter media, causing blockage of the filter pores and significantly reducing filtration efficiency and water treatment capacity. To restore filtration effectiveness, regular manual cleaning or replacement of the filter media is necessary. This not only increases the labor intensity and operating costs of aquaculture management but may also require filtration to be paused during cleaning, affecting the continuous operation of the system. Furthermore, untimely cleaning can lead to water quality fluctuations, adversely affecting aquaculture organisms.

[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-stage filtration device for a recirculating aquaculture system.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a multi-stage filtration device for a recirculating aquaculture system, including an aquaculture tank, and further comprising:

[0007] The drive box is fixedly installed on the side wall of the aquaculture tank;

[0008] A water pump is installed inside the drive box. The water inlet of the water pump is connected to the breeding tank through the water inlet pipe, and the water outlet of the water pump is connected to the water outlet pipe and the first water guide pipe respectively.

[0009] The mounting bracket is fixedly connected to the side wall of the breeding tank. The end of the mounting bracket is fixedly connected to the first filter box and the second filter box. Both the first filter box and the second filter box are equipped with an extension guide pipe. Multiple water outlet holes are equidistantly opened on the surface of the extension guide pipe. The first water guide pipe is fixedly connected to the extension guide pipe inside the first filter box. Both the first filter box and the second filter box are rotatably connected to a filter cylinder through a connecting shaft.

[0010] The third water guide pipe has one end rotatably connected to the filter cartridge inside the first filter box, and the other end fixedly connected to the extended guide pipe inside the second filter box. The filter cartridge inside the second filter box is connected to the breeding tank through the return pipe.

[0011] The water flow drive mechanism is located inside the drive box. It uses the impact force of the water flow from the outlet pipe to assist the water flow drive mechanism in rotating the two filter cartridges.

[0012] Furthermore, the filter holes of the filter cartridge inside the first filter box are larger than the filter holes of the filter cartridge inside the second filter box.

[0013] Furthermore, the water flow drive mechanism includes:

[0014] The linkage mechanism is jointly set on the surfaces of two connecting shafts that extend to the outside of the first and second filter boxes;

[0015] The drive shaft is rotatably connected inside the drive box, and the end of the drive shaft passes through the drive box and is fixedly connected to the end of the connecting shaft extending to the outside of the first filter box.

[0016] A waterwheel is located outside the drive shaft and below the outlet of the water pipe.

[0017] More specifically, the waterwheel includes multiple blades that are fixed to the outside of the drive shaft.

[0018] Preferably, the linkage mechanism includes:

[0019] The first pulley and the second pulley are respectively fixedly connected to the surfaces of the two connecting shafts;

[0020] A transmission belt, which is fitted onto the first pulley and the second pulley.

[0021] Furthermore, the side wall of the drive box is connected to the second filter box via a second water guide pipe.

[0022] Furthermore, both the first filter box and the second filter box have slag discharge pipes fixedly connected to their lower sides.

[0023] Preferably, the slag discharge pipe is equipped with a valve.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] By setting up two-stage filter boxes to house filter cartridges and using a water pump to sequentially introduce aquaculture water for filtration, multi-stage filtration is achieved, improving filtration efficiency and precision, and effectively removing impurities of different sizes from the water. This technical solution utilizes the water pump's output to drive a waterwheel, which in turn drives the two filter cartridges to rotate synchronously via a drive shaft and transmission mechanism. Combined with the water flow sprayed from the extended guide pipe, the filter cartridge surface is continuously flushed, achieving an automated self-cleaning function. This effectively solves the problems of easy clogging of filter screens and the need for manual cleaning in existing filtration devices, maintaining stable filtration efficiency and reducing maintenance costs and workload. Furthermore, the water used to drive the waterwheel is introduced into the second filter box through a second guide pipe for filtration, preventing this untreated water from flowing back directly, further improving overall water treatment efficiency. The entire device has a compact structure and a high degree of automation, better meeting the high requirements of modern aquaculture for water quality management, and possesses significant technological advancements and practical value. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] Figure 2 This is a schematic diagram showing the connection between the filter cartridge and the drive shaft in this practical application.

[0028] Figure 3 This is a schematic diagram showing the connection between the first filter box and the third water pipe in this utility model.

[0029] Figure 4 This is a schematic diagram showing the connection between the third guide tube and the extension guide tube in this practical application.

[0030] In the diagram: 1. Breeding tank; 11. Drive box; 12. Water pump; 13. Outlet pipe; 14. Inlet pipe; 2. Drive shaft; 21. Water wheel; 22. First pulley; 23. Transmission belt; 24. Second pulley; 25. Filter cartridge; 3. Mounting frame; 31. First filter box; 32. Second filter box; 33. First water guide pipe; 34. Second water guide pipe; 35. Third water guide pipe; 36. Return pipe; 37. Sludge discharge pipe; 38. Extension guide pipe. Detailed Implementation

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0032] In recirculating aquaculture systems, water quality management is crucial for ensuring successful aquaculture. Traditional filtration technologies play a vital role in removing suspended solids and organic matter from water. However, with increasing stocking density and longer aquaculture cycles, the impurity content in the water continuously increases, and existing filtration devices generally face problems such as easy clogging of filter screens or filter media and decreased filtration efficiency. This not only requires frequent manual cleaning and maintenance, increasing operating costs and labor intensity, but the cleaning process may also cause system interruptions, affecting water quality stability. To overcome these limitations of existing technologies, this invention proposes a multi-stage filtration device for recirculating aquaculture systems. Through ingenious structural design, this device achieves highly efficient filtration while possessing an automated self-cleaning function, significantly improving the stability and reliability of the system.

[0033] like Figures 1 to 4 The multi-stage filtration device of the recirculating aquaculture system shown includes an aquaculture tank 1, and further includes:

[0034] The drive box 11 is fixedly installed on the side wall of the breeding tank 1;

[0035] The water pump 12 is installed inside the drive box 11. The water inlet of the water pump 12 is connected to the breeding tank 1 through the water inlet pipe 14. The water outlet of the water pump 12 is connected to the water outlet pipe 13 and the first water guide pipe 33 respectively.

[0036] Mounting bracket 3 is fixedly connected to the side wall of breeding tank 1. The end of mounting bracket 3 is fixedly connected to a first filter box 31 and a second filter box 32. Both the first filter box 31 and the second filter box 32 are provided with an extension guide pipe 38. Multiple water outlet holes are equidistantly opened on the surface of the extension guide pipe 38. The first water guide pipe 33 is fixedly connected to the extension guide pipe 38 provided inside the first filter box 31. Both the first filter box 31 and the second filter box 32 are rotatably connected to a filter cylinder 25 through a connecting shaft.

[0037] The third water guide pipe 35 has one end rotatably connected to the filter cartridge 25 inside the first filter box 31, and the other end is fixedly connected to the extended guide pipe 38 inside the second filter box 32. The filter cartridge 25 inside the second filter box 32 is connected to the breeding tank 1 through the return pipe 36.

[0038] The water flow drive mechanism is located inside the drive box 11. With the help of the water flow impact force from the water outlet pipe 13, the water flow drive mechanism drives the two filter cartridges 25 to rotate.

[0039] The water flow drive mechanism includes:

[0040] The linkage mechanism is jointly disposed on the surfaces of two connecting shafts extending to the outside of the first filter box 31 and the second filter box 32;

[0041] The drive shaft 2 is rotatably connected inside the drive box 11, and the end of the drive shaft 2 passes through the drive box 11 and is fixedly connected to the end of the connecting shaft extending to the outside of the first filter box 31.

[0042] Waterwheel 21 is located outside the drive shaft 2 and below the outlet of the water outlet pipe 13.

[0043] The participating organizations include:

[0044] The first pulley 22 and the second pulley 24 are respectively fixedly connected to the surfaces of the two connecting shafts;

[0045] The transmission belt 23 is fitted onto the first pulley 22 and the second pulley 24.

[0046] In use, the drive box 11 is fixedly installed on the side wall of the breeding tank 1. Water from the breeding tank 1 is drawn out from the inlet pipe 14 by a water pump 12 installed inside the drive box 11. A portion of the water output by the water pump 12 is introduced into the first filter box 31 through the first water guide pipe 33. The first water guide pipe 33 is fixedly connected to an extension guide pipe 38 installed inside the first filter box 31. The extension guide pipe 38 is located above the first filter cartridge 25 and distributes the water evenly within the first filter box 31 through multiple outlet holes on its surface. Water enters the interior of the first filter cartridge 25 from its outer surface, while larger impurities are filtered out from the outside of the first filter cartridge 25. The water after the initial filtration enters the second filter box 32 through a third water guide pipe 35 via an extension guide pipe 38 located above the second filter cartridge 25 and distributes the water evenly within the second filter box 32 through multiple outlet holes on its surface. Water enters the interior of the second filter cartridge 25 from its outer surface, while smaller impurities are filtered out on the outside of the second filter cartridge 25, achieving secondary filtration. The water after secondary filtration is then introduced into the aquaculture tank 1 through a return pipe 36 connected to the second filter box 32. Simultaneously, another portion of the water output from the water pump 12 is discharged through the outlet pipe 13. The water flow impacts the waterwheel 21 located outside the drive shaft 2 (the impact force of the water flow from the water pump 12 to the outlet pipe 13 drives the waterwheel 21 to rotate), pushing the waterwheel 21 to rotate, which in turn drives the drive shaft 2 to rotate. The rotation of the drive shaft 2, driven by the transmission belt 23, causes the two filter cartridges 25 to rotate synchronously. The rotation of the filter cartridges 25 causes the contact position between the water flow sprayed from the extended guide pipe 38 and the surface of the filter cartridges 25 to constantly change, thus achieving filtration while also flushing away impurities on the surface of the filter cartridges 25, achieving self-cleaning. Both the first filter box 31 and the second filter box 32 are equipped with slag discharge pipes 37 on their sides to facilitate the discharge of filtered and flushed-down impurities.

[0047] In one embodiment of this utility model, the filter holes of the filter cartridge 25 inside the first filter box 31 are larger than the filter holes of the filter cartridge 25 inside the second filter box 32.

[0048] During operation, by employing filter cartridges 25 with different pore sizes, this invention achieves more refined multi-stage filtration. First, the filter cartridge 25 with larger pores removes most of the coarse impurities, reducing the burden on subsequent filter cartridges 25 with smaller pores. This effectively prevents the smaller pore filter cartridges 25 from clogging too quickly, extending their service life and cleaning cycle.

[0049] As one embodiment of this utility model, the waterwheel 21 includes multiple blades, which are fixed on the outside of the drive shaft 2.

[0050] During operation, in the aforementioned water flow drive mechanism, the waterwheel 21 is a component used to capture the kinetic energy of the water flow. The waterwheel 21 consists of multiple blades, which are fixed at a certain angle to the outside of the drive shaft 2. When the water pump 12 discharges water from the outlet pipe 13, the water flow impacts these blades, generating thrust, causing the waterwheel 21 to rotate around the drive shaft 2.

[0051] In one embodiment of this utility model, the side wall of the drive box 11 is connected to the second filter box 32 through the second water guide pipe 34.

[0052] During operation, by adding a second water guide pipe 34 and guiding the water driven by the water cart 21 into the second filter box 32 for filtration, this utility model ensures that all water drawn from the breeding tank 1 can pass through at least one stage of filtration, thereby improving the overall water treatment efficiency.

[0053] In one embodiment of this utility model, slag discharge pipes 37 are fixedly connected to the lower side of both the first filter box 31 and the second filter box 32.

[0054] As one embodiment of this utility model, a valve is provided on the slag discharge pipe 37.

[0055] During operation, in the aforementioned multi-stage filtration device, to facilitate the removal of impurities washed down from the surface of the filter cartridge 25 during the filtration process, slag discharge pipes 37 are installed on the lower sides of both the first filter box 31 and the second filter box 32, allowing impurities that have settled to the bottom to be discharged through the slag discharge pipes 37. The location and size of the slag discharge pipes 37 can be designed according to the size of the filter box and the expected slag discharge volume to ensure that impurities can be discharged smoothly.

[0056] By installing a valve on the slag discharge pipe 37, this invention provides a controllable and efficient means of impurity discharge. The introduction of the valve allows users to flexibly control the slag discharge process according to actual conditions, avoiding unnecessary loss of aquaculture water during non-essential periods, thereby improving water resource utilization efficiency.

[0057] Working principle of this utility model:

[0058] In use, the drive box 11 is fixedly installed on the side wall of the breeding tank 1. The drive water pump 12, installed inside the drive box 11, draws water from the breeding tank 1 through the inlet pipe 14 and guides it into the outlet pipe 13 and the first guide pipe 33 (the output end of the water pump 12 is connected to the outlet pipe 13 and the first guide pipe 33). Since the first guide pipe 33 is fixedly connected to the extension guide pipe 38 installed inside the first filter box 31, the first guide pipe 33, with the help of the extension guide pipe 38, can evenly distribute the water within the first filter box 31. A filter cartridge 25 is installed, and an extension guide pipe 38 is located above the filter cartridge 25. Water enters the filter cartridge 25 from the outer surface of the filter cartridge 25, while impurities are filtered out on the outside of the filter cartridge 25. The water after the first filtration enters the second filter box 32 from one end of the filter cartridge 25 through the third water guide pipe 35. Of course, the third water guide pipe 35 is also equipped with an extension guide pipe 38 at one end of the second filter box 32. Similarly, the second filter box 32 also has a filter cartridge 25. The same filtration method guides the water after the second filtration into the breeding tank 1 through the return pipe 36 connected to the second filter box 32.

[0059] Since the water pump 12 also supplies water to the outlet pipe 13, it will drive the waterwheel 21 outside the drive shaft 2 to rotate. Since the first pulley 22 is installed on the outer side of one end of the drive shaft 2, the first pulley 22 drives the second pulley 24 through the transmission belt 23. The inner circumference of the second pulley 24 is connected to the lower filter cylinder 25 through the shaft body, while the drive shaft 2 is connected to the upper filter cylinder 25. The two filter cylinders 25 rotate synchronously, so that the contact position between the water flow sprayed from the extended guide pipe 38 and the surface of the filter cylinder 25 keeps changing. While playing a filtering role, it can also wash away impurities on the surface of the filter cylinder 25. (In addition, the filter holes of the lower filter cylinder 25 are smaller than those of the upper filter cylinder 25, realizing multi-stage filtration). The sides of the first filter box 31 and the second filter box 32 are provided with slag discharge pipes 37 to facilitate the discharge of impurities that have been filtered and flushed down. The slag discharge pipe 37 can be equipped with a valve. The second water guide pipe 34 can also discharge the water used to power the waterwheel 21 into the second filter box 32 for filtration.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection claimed by this utility model, which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration device for a recirculating aquaculture system, comprising an aquaculture tank (1), characterized in that, Also includes: The drive box (11) is fixedly installed on the side wall of the breeding tank (1); A water pump (12) is installed inside the drive box (11). The inlet of the water pump (12) is connected to the breeding tank (1) through the inlet pipe (14). The outlet of the water pump (12) is connected to the outlet pipe (13) and the first water guide pipe (33) respectively. The mounting bracket (3) is fixedly connected to the side wall of the breeding tank (1). The end of the mounting bracket (3) is fixedly connected to the first filter box (31) and the second filter box (32). The first filter box (31) and the second filter box (32) are both provided with an extension guide pipe (38). The surface of the extension guide pipe (38) is provided with multiple water outlet holes at equal intervals. The first water guide pipe (33) is fixedly connected to the extension guide pipe (38) provided inside the first filter box (31). The first filter box (31) and the second filter box (32) are both rotatably connected to a filter cylinder (25) through a connecting shaft. The third water guide pipe (35) is rotatably connected at one end to the filter cartridge (25) inside the first filter box (31), and fixedly connected at the other end to the extended guide pipe (38) inside the second filter box (32). The filter cartridge (25) inside the second filter box (32) is connected to the breeding tank (1) through the return pipe (36). The water flow drive mechanism is located inside the drive box (11). With the help of the water flow impact force from the water outlet pipe (13), the water flow drive mechanism drives the two filter cartridges (25) to rotate.

2. The multi-stage filtration device for the recirculating aquaculture system according to claim 1, characterized in that, The filter holes of the filter cartridge (25) inside the first filter box (31) are larger than the filter holes of the filter cartridge (25) inside the second filter box (32).

3. The multi-stage filtration device for the recirculating aquaculture system according to claim 1, characterized in that, The water flow driving mechanism includes: The linkage mechanism is jointly set on the surfaces of two connecting shafts that extend to the outside of the first filter box (31) and the second filter box (32); The drive shaft (2) is rotatably connected inside the drive box (11), and the end of the drive shaft (2) passes through the drive box (11) and is fixedly connected to the end of the connecting shaft extending to the outside of the first filter box (31). Waterwheel (21) is located outside the drive shaft (2) and below the outlet of the water pipe (13).

4. The multi-stage filtration device for the recirculating aquaculture system according to claim 3, characterized in that, The waterwheel (21) includes multiple blades, which are fixed to the outside of the drive shaft (2).

5. The multi-stage filtration device for the recirculating aquaculture system according to claim 3, characterized in that, The linkage mechanism includes: The first pulley (22) and the second pulley (24) are respectively fixedly connected to the surfaces of the two connecting shafts; A transmission belt (23) is fitted onto the first pulley (22) and the second pulley (24).

6. The multi-stage filtration device for a recirculating aquaculture system according to claim 1, characterized in that, The side wall of the drive box (11) is connected to the second filter box (32) through the second water guide pipe (34).

7. The multi-stage filtration device for a recirculating aquaculture system according to claim 1, characterized in that, Both the first filter box (31) and the second filter box (32) have slag discharge pipes (37) fixedly connected to their lower sides.

8. The multi-stage filtration device for a recirculating aquaculture system according to claim 7, characterized in that, A valve is installed on the slag discharge pipe (37).

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