Water quality purification device for aquaculture

Abstract

The invention relates to the field of water quality purification devices, in particular to a water quality purification device for aquaculture, which comprises a bottom plate, a separation box is fixed at the center of the top of the bottom plate, and a rotatable roller separation sieve is obliquely arranged at the position, close to the top, of the center of the interior of the separation box; mounting bases used for mounting the roller separating screen are arranged at the front end and the rear end, close to the top, in the separating box, annular limiting grooves are formed in the inner sides of the mounting bases, and spiral conveying blades used for driving impurities to move upwards are fixed in the roller separating screen; annular limiting sliding rails capable of being matched with the annular limiting grooves are symmetrically arranged at the two ends of the roller separation sieve, and a toothed belt used for transmission is arranged at the position, close to the output end, of the outer portion of the roller separation sieve. The problem that the water quality purification device cannot treat floating objects is solved.

Description

Technical Field

[0001] The invention relates to the field of water purification devices, and in particular to a water purification device used for aquaculture. Background Art

[0002] The aquaculture water purification device is an efficient and environmentally friendly scientific and technological product, specially designed to solve the water pollution problem in the aquaculture process. The device integrates multiple technologies such as physical filtration, biological purification and chemical regulation to effectively remove suspended matter, organic matter, ammonia nitrogen, nitrite and other harmful substances in the water, while promoting the growth of beneficial microorganisms and enhancing the self-purification ability of the water. Its intelligent control system can monitor water quality parameters in real time and automatically adjust the purification efficiency to ensure that the aquaculture water is clear and healthy, providing an excellent growth environment for aquatic organisms, which not only improves the efficiency and quality of aquaculture, but also promotes the green and sustainable development of the aquaculture industry.

[0003] The patent document with announcement number CN110436534A discloses a water purification device with an energy storage component, the water purification device includes a water purification barrel, a filter steel mesh is arranged on the top of the water purification barrel, the filter steel mesh is truncated, the filter steel mesh is inverted, the water purification device also includes an energy storage device, the energy storage device includes a support frame, the support frame includes a support rod and a support plate, the two ends of the support rod are connected to the support plate and the filter steel mesh, the side of the support plate is serrated, the water purification device also includes a purification component, the water pump of the purification component is electrically connected to the energy storage device, the application pumps the upper layer of water into the water purification barrel, isolates the solid impurities in the filter steel mesh through the filter steel mesh; then purifies the water through the purification of the multi-layer purification chamber; and an energy storage device is arranged at the filter steel mesh, the energy storage device floats on the water surface, and the solar panel is arranged on the serrated support plate, so that more energy is obtained in a limited space, and the energy converted by solar energy is directly supplied to the water pump, so that the water purification device is more energy-efficient, but the following deficiencies still exist.

[0004] Although the water purification device in the above patent document is provided with a filter steel mesh at the top so that the filter steel mesh can filter floating objects in the water, the filtered floating objects will accumulate inside the filter steel mesh and need to be cleaned manually regularly, which is extremely inconvenient to use. Therefore, the inventor proposes a water purification device for aquaculture to solve the above problem. Summary of the invention

[0005] In view of the above problems, a water purification device for aquaculture is provided, in which the two ends of a drum separation screen are movably mounted inside a mounting seat, and annular limiting grooves are respectively provided inside the two groups of mounting seats, so that the annular limiting slide rails at both ends of the drum separation screen are movably mounted inside the annular limiting grooves, so as to prevent the drum separation screen from detaching from the mounting seat during rotation, and the spiral conveying blades are fixed to the inner surface of the drum separation screen, so that impurities in the water are separated during the rotation of the drum separation screen, and the separated impurities are driven by the spiral conveying blades to move upward along the inner wall of the drum separation screen, so that the separated impurities are transported to the inside of the fairing through the conical extension pipe, and then discharged through the second slag discharge elbow at the output end of the fairing, so that the water purification device can separate floating objects, and solves the problem that the water purification device cannot process floating objects.

[0006] In order to solve the problems of the prior art, the present invention provides a water purification device for aquaculture, comprising a bottom plate, a separation box is fixed at the center of the top of the bottom plate, and a rotatable drum separation screen is obliquely arranged at a position near the top of the center of the separation box, and mounting seats for mounting the drum separation screen are arranged at the front end and the rear end near the top of the separation box, an annular limiting groove is arranged on the inner side of the mounting seat, and a spiral conveying blade for driving impurities upward is fixed inside the drum separation screen, and an annular limit groove that can be adapted to the annular limit groove is symmetrically arranged at both ends of the drum separation screen. shaped limiting slide rail, and a toothed belt for transmission is arranged on the outside of the drum separation screen near the output end, and a conical extension pipe capable of penetrating the separation box is arranged at the output end of the drum separation screen, and a fairing is fixed at the rear end of the separation box, and the conical extension pipe is movably installed inside the fairing, and a second slag discharge elbow for discharging filtered impurities is fixed at the output end of the fairing, so as to separate impurities in water during the rotation of the drum separation screen, and drive the separated impurities upward along the inner wall of the drum separation screen through the spiral conveying blades, so that the water purification device can separate and discharge floating objects.

[0007] As a technical solution of the present invention, a fourth rotating drive member is fixed at the center of the top of the rear end of the separation box through a frame, and a gear that can engage with a toothed belt is installed at the output end of the fourth rotating drive member, so that the fourth rotating drive member drives the gear to rotate and the toothed belt to rotate at the same time, so that the toothed belt drives the drum separation screen to rotate.

[0008] As a technical solution of the present invention, a liquid inlet pipe that can communicate with the interior of the drum separation screen is installed at the center of the front end of the separation box near the top, so that the sewage from the liquid inlet pipe can be transported to the interior of the drum separation screen, so that the drum separation screen can separate the impurities floating in the sewage.

[0009] As a technical solution of the present invention, a sedimentation tank for sedimentation is provided at the bottom of the separation box, and a second rotating driving member is fixed to the bottom of the front end of the separation box, and the output end of the second rotating driving member is provided with a first spiral conveying rod that can be horizontally installed at the bottom of the sedimentation tank for outputting the sediment, so that the second rotating driving member can drive the first spiral conveying rod to rotate while driving the impurities precipitated in the sedimentation tank into the lifting device.

[0010] As a technical solution of the present invention, a lifting device capable of being connected to the sedimentation tank is longitudinally arranged at the center of the rear end of the separation box, a third rotating driving member is fixed at the center of the top of the lifting device, and the output end of the third rotating driving member is provided with a second spiral conveying rod capable of driving the sediment transported to the inside of the lifting device to move upward, and a first slag discharge elbow pipe capable of being connected to the inside of the lifting device for discharging the sediment is provided on one side of the top of the lifting device, so that the third rotating driving member can drive the second spiral conveying rod to rotate and drive the impurities inside the lifting device to move upward, and discharge them through the first slag discharge elbow pipe on one side of the lifting device, so that the water purification device can automatically clean the sediment.

[0011] As a technical solution of the present invention, a flocculant storage device for storing flocculants is provided on one side of the upper end surface of the bottom plate close to the separation box, and a flow control valve capable of controlling the output flow is provided at the output end of the flocculant storage device, and an addition pipe capable of extending to the interior of the separation box is installed at one end of the flow control valve, and a plurality of liquid outlets for outputting the flocculant liquid are equidistantly provided at the bottom of the addition pipe, so that when the flocculant inside the flocculant storage device is transported to the interior of the separation box through the flow control valve and the addition pipe, the amount of flocculant added can be controlled by the flow control valve, thereby achieving the purpose of scientific flocculant addition.

[0012] As a technical solution of the present invention, a fifth rotating drive member is fixed at the front end of the separation box near the bottom of the liquid inlet pipe, and a rotatable stirring shaft is installed at the output end of the fifth rotating drive member, and a plurality of second stirring blades that can stir the inside of the separation box are equidistantly arranged on the outside of the stirring shaft, so that the fifth rotating drive member can drive the stirring shaft to rotate while stirring the sewage and flocculant inside the separation box through the second stirring blades, thereby improving the flocculation efficiency and shortening the sedimentation cycle.

[0013] As a technical solution of the present invention, a purification box for purifying sewage is arranged on the other side of the upper end surface of the bottom plate close to the separation box, and multiple filter layers for filtering sewage are arranged inside the purification box so that the filter layers can filter the sewage.

[0014] As a technical solution of the present invention, a first rotating driving member is arranged at the center of the top of the purification box, and a plurality of first stirring blades for stirring are fixed to the outside of the output end of the first rotating driving member, so that the first rotating driving member drives the first stirring blades to stir the filtered sewage inside the purification box, so that the disinfectant can be mixed with the sewage, thereby improving the sewage disinfection cycle.

[0015] As a technical solution of the present invention, a disinfectant storage device is provided on one side of the top of the purification box close to the first rotating drive member, and the output end of the disinfectant storage device can be connected to the interior of the purification box, so that the disinfectant storage device can add disinfectant to the interior of the purification box, thereby disinfecting the sewage inside the purification box.

[0016] As a technical solution of the present invention, a drain pipe for drainage is installed near the top of one side of the purification box, so that the water purified inside the purification box can be discharged through the drain pipe.

[0017] As a technical solution of the present invention, two groups of brackets for fixing the separation box are vertically arranged at the center of the upper end surface of the bottom plate, so that the brackets can support the separation box.

[0018] As a technical solution of the present invention, a water pump is fixed at the center of the top end of one side of the bracket, the input end of the water pump can extend into the interior of the separation box, and the output end of the water pump is equipped with a connecting elbow pipe that can be connected to the bottom of the purification box, so that the water pump can transport the water precipitated in the purification box to the interior of the purification box through the connecting elbow pipe.

[0019] As a technical solution of the present invention, a flushing device is fixed to the top of the separation box, a hanging rod is fixed at the center of the bottom of the flushing device, and a delivery water pipe is installed inside the hanging rod, and a plurality of high-pressure nozzles for flushing the surface of the drum separation screen are equidistantly arranged at the bottom of the delivery water pipe, and a first electromagnetic control valve is arranged outside the input end of the delivery water pipe to facilitate the pipeline to transport water to the inside of the delivery water pipe, and the surface of the drum separation screen is flushed through multiple groups of high-pressure nozzles arranged at the bottom of the delivery water pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present application realizes that the two ends of the drum separation screen are movably mounted inside the mounting seats, and annular limiting grooves are respectively provided inside the two groups of mounting seats, so that the annular limiting slide rails at the two ends of the drum separation screen are respectively movably mounted inside the annular limiting grooves, so as to prevent the drum separation screen from detaching from the mounting seats during rotation, and the spiral conveying blades are fixed to the inner surface of the drum separation screen, so that the impurities in the water are separated during the rotation of the drum separation screen, and the separated impurities are driven by the spiral conveying blades to move upward along the inner wall of the drum separation screen, so that the separated impurities are transported to the inside of the fairing through the conical extension pipe, and then discharged through the second slag discharge elbow at the output end of the fairing, so that the water purification device can separate the floating objects, and solves the problem that the water purification device cannot process the floating objects.

[0021] The present application realizes that a first spiral conveying rod is rotatably installed inside a sedimentation tank at the bottom of the separation box, and a second rotating driving member is fixed at the bottom of the front end of the separation box, and one end of the first spiral conveying rod is fixed to the output end of the second rotating driving member, so that the second rotating driving member drives the first spiral conveying rod to rotate and at the same time drives the impurities precipitated in the sedimentation tank into the interior of the lifting device, and then the third rotating driving member at the top of the lifting device drives the impurities inside the lifting device upward and is discharged through the first slag discharge elbow on one side of the lifting device, thereby realizing that the water purification device can automatically clean the sediment, and solving the problem of inconvenient sediment cleaning inside the water purification device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a stereoscopic diagram of a water purification device used in aquaculture.

[0023] Figure 2 It is a top view of a water purification device used in aquaculture.

[0024] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle.

[0025] Figure 4 yes Figure 2 Cross-sectional view at the middle BB.

[0026] Figure 5 The present invention is a schematic diagram of the internal structure of a separation box in a water purification device used in aquaculture.

[0027] Figure 6 It is a stereoscopic diagram of a drum separation screen in a water purification device used in aquaculture.

[0028] Figure 7 The present invention is a stereoscopic diagram of a flushing device in a water purification device used in aquaculture.

[0029] Figure 8It is a stereoscopic diagram of an addition tube in a water purification device used in aquaculture.

[0030] Fig. 9 yes Figure 3 Enlarged view of point A in .

[0031] The numbers in the figure are: 1, bottom plate; 11, bracket; 12, purification box; 13, filter layer; 14, drain pipe; 15, first rotary drive member; 16, first stirring blade; 17, disinfectant storage device; 2, separation box; 21, liquid inlet pipe; 22, mounting seat; 23, annular limit groove; 24, sedimentation tank; 25, second rotary drive member; 26, first spiral conveying rod; 27, lifting device; 28, third rotary drive member; 29, second spiral conveying rod; 210, first slag discharge elbow; 3, flushing device; 31 , suspension rod; 32, water delivery pipe; 33, high-pressure nozzle; 34, first electromagnetic control valve; 4, drum separation screen; 41, annular limit slide rail; 42, conical extension pipe; 43, fairing; 44, second slag discharge elbow; 45, toothed belt; 5, spiral conveying blade; 6, fourth rotary drive member; 61, gear; 7, flocculant storage device; 71, flow control valve; 72, addition pipe; 73, liquid outlet; 8, fifth rotary drive member; 81, stirring shaft; 82, second stirring blade; 9, water pump; 91, connecting elbow. DETAILED DESCRIPTION

[0032] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] See also Figure 1-Figure 9 As shown, a water purification device for aquaculture comprises a bottom plate 1, a separation box 2 is fixed at the center of the top of the bottom plate 1, and a rotatable drum separation screen 4 is obliquely arranged at the center of the separation box 2 near the top, and a mounting seat 22 for mounting the drum separation screen 4 is arranged at the front end and the rear end near the top of the separation box 2, an annular limiting groove 23 is arranged on the inner side of the mounting seat 22, and a spiral conveying blade 5 for driving impurities upward is fixed inside the drum separation screen 4, and an annular limiting slide rail 41 capable of matching with the annular limiting groove 23 is symmetrically arranged at both ends of the drum separation screen 4, and a toothed belt 45 for transmission is arranged at the outer side of the drum separation screen 4 near the output end, and a conical extension pipe 42 capable of penetrating the separation box 2 is arranged at the output end of the drum separation screen 4, and a fairing 43 is fixed at the rear end of the separation box 2, and the conical extension pipe 42 is movably installed inside the fairing 43, and a second slag discharge elbow 44 for discharging filtered impurities is fixed at the output end of the fairing 43.

[0034] When in use, the two ends of the drum separation screen 4 are movably mounted inside the mounting seat 22, and annular limiting grooves 23 are respectively provided inside the two groups of mounting seats 22, so that the annular limiting slide rails 41 at both ends of the drum separation screen 4 are respectively movably mounted inside the annular limiting grooves 23, so as to prevent the drum separation screen 4 from detaching from the mounting seat 22 during rotation, and the spiral conveying blades 5 are fixed to the inner surface of the drum separation screen 4, so that the impurities in the water are separated during the rotation of the drum separation screen 4, and the separated impurities are driven by the spiral conveying blades 5 to move upward along the inner wall of the drum separation screen 4, so that the separated impurities are transported to the inside of the fairing 43 through the conical extension tube 42, and then discharged from the second slag discharge elbow 44 at the output end of the fairing 43, so that the water purification device can separate and discharge the floating objects.

[0035] See also Figure 6 As shown, a fourth rotary drive member 6 is fixed at the center of the top of the rear end of the separation box 2 through a frame, and a gear 61 capable of meshing with the toothed belt 45 is installed at the output end of the fourth rotary drive member 6.

[0036] When in use, the fourth rotating drive member 6 is installed obliquely at the center of the top of the separation box 2 near the rear end, and a gear 61 is installed at the output end of the fourth rotating drive member 6, and the gear 61 can engage with the toothed belt 45, so that the fourth rotating drive member 6 drives the gear 61, and the gear 61 then drives the drum separation screen 4 to rotate through the toothed belt 45.

[0037] See also Figure 1 and Figure 3 As shown, a liquid inlet pipe 21 capable of communicating with the interior of the drum separation screen 4 is installed at a position near the top at the center of the front end of the separation box 2.

[0038] When in use, a liquid inlet pipe 21 is arranged at the front end of the separation box 2, and the liquid inlet pipe 21 can be connected to the inside of the drum separation screen 4, so that the sewage is transported to the inside of the drum separation screen 4 through the liquid inlet pipe 21, so that the drum separation screen 4 can separate the impurities floating in the sewage.

[0039] See also Figure 3 and Figure 4 As shown, a sedimentation tank 24 for sedimentation is provided at the bottom of the separation box 2, and a second rotating drive member 25 is fixed to the bottom of the front end of the separation box 2, and the output end of the second rotating drive member 25 is provided with a first spiral conveying rod 26 that can be horizontally installed at the bottom of the sedimentation tank 24 for outputting the sediment.

[0040] When in use, the first screw conveying rod 26 is rotatably installed inside the sedimentation tank 24 at the bottom of the separation box 2, and the second rotating driving member 25 is fixed to the bottom of the front end of the separation box 2, and one end of the first screw conveying rod 26 is fixed to the output end of the second rotating driving member 25, so that the second rotating driving member 25 drives the first screw conveying rod 26 to rotate and drives the impurities precipitated in the sedimentation tank 24 to enter the lifting device 27.

[0041] See also Figure 3 and Figure 4 As shown, a lifting device 27 capable of communicating with the sedimentation tank 24 is longitudinally arranged at the center of the rear end of the separation box 2, a third rotating driving member 28 is fixed at the center of the top end of the lifting device 27, and a second spiral conveying rod 29 capable of driving the sediment transported to the inside of the lifting device 27 to move upward is arranged at the output end of the third rotating driving member 28, and a first slag discharge elbow 210 capable of communicating with the inside of the lifting device 27 for discharging the sediment is arranged on one side of the top end of the lifting device 27.

[0042] When in use, the third rotating drive member 28 is fixed to the top of the lifting device 27, and a second screw conveying rod 29 is arranged at the output end of the third rotating drive member 28, so that the third rotating drive member 28 drives the second screw conveying rod 29 to rotate and drive the impurities inside the lifting device 27 to move upward, and are discharged through the first slag discharge elbow 210 on one side of the lifting device 27, so that the sediment can be automatically cleaned.

[0043] See also Figure 4 and Figure 8 As shown, a flocculant storage device 7 for storing flocculants is provided on one side of the upper end surface of the bottom plate 1 close to the separation box 2, and a flow control valve 71 capable of controlling the output flow is provided at the output end of the flocculant storage device 7, and an addition pipe 72 capable of extending to the interior of the separation box 2 is installed at one end of the flow control valve 71, and a plurality of liquid outlets 73 for outputting the flocculant liquid are equidistantly provided at the bottom of the addition pipe 72.

[0044] When in use, by fixing the flow control valve 71 at the output end of the flocculant storage device 7, and installing the addition pipe 72 at the output end of the flow control valve 71, and the addition pipe 72 can extend to the interior of the separation box 2, when the flocculant inside the flocculant storage device 7 is transported to the interior of the separation box 2 through the flow control valve 71 and the addition pipe 72, the amount of flocculant added can be controlled by the flow control valve 71, thereby achieving the purpose of scientific flocculant addition.

[0045] See also Figure 3As shown, a fifth rotating drive member 8 is fixed to the bottom of the liquid inlet pipe 21 at the front end of the separation box 2, and a rotatable stirring shaft 81 is installed at the output end of the fifth rotating drive member 8, and a plurality of second stirring blades 82 capable of stirring the interior of the separation box 2 are equidistantly arranged on the outside of the stirring shaft 81.

[0046] When in use, the fifth rotating drive member 8 is fixed at the front end of the separation box 2 near the bottom of the liquid inlet pipe 21, and a stirring shaft 81 is arranged at the output end of the fifth rotating drive member 8, so that the fifth rotating drive member 8 drives the stirring shaft 81 to rotate while the second stirring blade 82 is used to stir the sewage and flocculant inside the separation box 2, thereby improving the flocculation efficiency and shortening the sedimentation cycle.

[0047] See also Figure 1 and Figure 4 As shown, a purification box 12 for purifying sewage is arranged on the other side of the upper end surface of the bottom plate 1 close to the separation box 2, and a plurality of filter layers 13 for filtering sewage are arranged inside the purification box 12.

[0048] When in use, the filter layer 13 is fixed horizontally at the center of the purification box 12 so that the filter layer 13 filters the sewage.

[0049] See also Figure 4 As shown, a first rotating driving member 15 is disposed at the center of the top of the purification box 12 , and a plurality of first stirring blades 16 for stirring are fixed outside the output end of the first rotating driving member 15 .

[0050] When in use, the first rotating drive member 15 is fixed at the center of the top of the purification box 12, and the output end of the first rotating drive member 15 can extend into the purification box 12, and a plurality of first stirring blades 16 are arranged outside the output end of the first rotating drive member 15, so that the first rotating drive member 15 drives the first stirring blades 16 to stir the filtered sewage in the purification box 12, so that the disinfectant can be mixed with the sewage, thereby improving the sewage disinfection cycle.

[0051] See also Figure 1 and Figure 4 As shown, a disinfectant storage device 17 is provided on one side of the top of the purification box 12 close to the first rotary drive member 15 , and the output end of the disinfectant storage device 17 can be communicated with the interior of the purification box 12 .

[0052] When in use, a disinfectant storage device 17 is provided on one side of the top of the purification box 12 so that the disinfectant storage device 17 adds disinfectant into the purification box 12 , thereby disinfecting the sewage in the purification box 12 .

[0053] See also Figure 1 and Figure 4As shown, a drain pipe 14 for draining water is installed near the top of one side of the purification box 12.

[0054] When in use, the drain pipe 14 is fixed to the top of one side of the purification box 12 so that the purified water inside the purification box 12 can be discharged through the drain pipe 14 .

[0055] See also Figure 1 and Figure 4 As shown, two groups of brackets 11 for fixing the separation box 2 are vertically arranged on the upper end surface of the bottom plate 1.

[0056] When in use, two groups of brackets 11 are arranged on the upper end surface of the bottom plate 1 , and the bottoms of both sides of the separation box 2 are fixed on the inner sides of the brackets 11 , so that the brackets 11 support the separation box 2 .

[0057] See also Figure 4 As shown, a water pump 9 is fixed at the center of the top of one side of the bracket 11, the input end of the water pump 9 can extend into the separation box 2, and the output end of the water pump 9 is installed with a connecting elbow 91 that can communicate with the bottom of the purification box 12.

[0058] When in use, the water pump 9 is fixed on one side of the bracket 11, and the input end of the water pump 9 can be connected with the separation box 2, and the output end of the water pump 9 is connected with the bottom of the purification box 12 through the connecting elbow 91, so that the water pump 9 can pump out the precipitated water in the purification box 12, and then the water pump 9 transports the water flow to the inside of the purification box 12 through the connecting elbow 91 set at the output end.

[0059] See also Figure 1 , Figure 3 and Figure 7 As shown, a flushing device 3 is fixed to the top of the separation box 2, a hanging rod 31 is fixed at the center of the bottom of the flushing device 3, and a water delivery pipe 32 is installed inside the hanging rod 31, and a plurality of high-pressure nozzles 33 for flushing the surface of the drum separation screen 4 are equidistantly arranged at the bottom end of the water delivery pipe 32, and a first electromagnetic control valve 34 is arranged outside the input end of the water delivery pipe 32.

[0060] When in use, the pipeline is connected to the input end of the water delivery pipe 32 so that the pipeline delivers water to the inside of the water delivery pipe 32 and the surface of the drum separation screen 4 is washed through multiple groups of high-pressure nozzles 33 arranged at the bottom of the water delivery pipe 32.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A water purification device for aquaculture, comprising a bottom plate (1), characterized in that: A separation box (2) is fixed at the center of the top of the bottom plate (1), and a rotatable drum separation screen (4) is obliquely arranged at a position near the top of the center of the separation box (2), and a mounting seat (22) for mounting the drum separation screen (4) is arranged at the front end and the rear end near the top of the separation box (2), and an annular limiting groove (23) is arranged on the inner side of the mounting seat (22), and a spiral conveying blade (5) for driving impurities upward is fixed inside the drum separation screen (4), and the two ends of the drum separation screen (4) are aligned with each other. An annular limiting slide rail (41) capable of matching with the annular limiting groove (23) is provided, and a toothed belt (45) for transmission is provided at a position near the output end of the drum separation screen (4), and a conical extension pipe (42) capable of penetrating the separation box (2) is provided at the output end of the drum separation screen (4), and a fairing (43) is fixed at the rear end of the separation box (2), and the conical extension pipe (42) is movably installed inside the fairing (43), and a second slag discharge elbow (44) for discharging filtered impurities is fixed at the output end of the fairing (43).

2. A water purification device for aquaculture according to claim 1, characterized in that: A fourth rotary drive member (6) is fixed via a frame at the center of the top of the rear end of the separation box (2), and a gear (61) capable of meshing with a toothed belt (45) is installed at the output end of the fourth rotary drive member (6).

3. A water purification device for aquaculture according to claim 1, characterized in that: A liquid inlet pipe (21) capable of communicating with the interior of the drum separation screen (4) is installed at a position close to the top at the front center of the separation box (2).

4. A water purification device for aquaculture according to claim 1, characterized in that: The bottom of the separation box (2) is provided with a sedimentation tank (24) for sedimentation, and a second rotary drive member (25) is fixed to the bottom of the front end of the separation box (2), and the output end of the second rotary drive member (25) is provided with a first spiral conveying rod (26) that can be horizontally mounted on the bottom of the sedimentation tank (24) for outputting sediment.

5. The water purification device for aquaculture according to claim 1, characterized in that: A lifting device (27) capable of communicating with the sedimentation tank (24) is longitudinally arranged at the center of the rear end of the separation box (2); a third rotating driving member (28) is fixed at the center of the top end of the lifting device (27); a second spiral conveying rod (29) capable of driving the sediment transported to the inside of the lifting device (27) to move upward is arranged at the output end of the third rotating driving member (28); and a first slag discharge elbow (210) capable of communicating with the inside of the lifting device (27) for discharging the sediment is arranged on one side of the top end of the lifting device (27).

6. The water purification device for aquaculture according to claim 1, characterized in that: A flocculant storage device (7) for storing flocculants is arranged on one side of the upper end surface of the bottom plate (1) close to the separation box (2), and a flow control valve (71) capable of controlling the output flow is arranged at the output end of the flocculant storage device (7), and an addition pipe (72) capable of extending into the interior of the separation box (2) is installed at one end of the flow control valve (71), and a plurality of liquid outlets (73) for outputting the flocculant liquid are equidistantly arranged at the bottom of the addition pipe (72).

7. The water purification device for aquaculture according to claim 1, characterized in that: A fifth rotating drive member (8) is fixed to the bottom of the front end of the separation box (2) near the liquid inlet pipe (21); a rotatable stirring shaft (81) is mounted on the output end of the fifth rotating drive member (8); and a plurality of second stirring blades (82) capable of stirring the interior of the separation box (2) are equidistantly arranged outside the stirring shaft (81).

8. The water purification device for aquaculture according to claim 1, characterized in that: A purification box (12) for purifying sewage is arranged on the other side of the upper end surface of the bottom plate (1) close to the separation box (2), and a plurality of filter layers (13) for filtering sewage are arranged inside the purification box (12).

9. A water purification device for aquaculture according to claim 8, characterized in that: A first rotating driving member (15) is arranged at the center of the top end of the purification box (12), and a plurality of first stirring blades (16) for stirring are fixed outside the output end of the first rotating driving member (15).

10. The water purification device for aquaculture according to claim 8, characterized in that: A disinfectant storage device (17) is provided on one side of the top end of the purification box (12) close to the first rotating drive member (15), and an output end of the disinfectant storage device (17) can be in communication with the interior of the purification box (12).

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