A circulating fish breeding device

Abstract

The present invention belongs to the technical field of aquaculture, and in particular, relates to a circulating fish farming device. The present invention uses a fish tank unit for farming fish and a sedimentation tank unit for circulating and purifying the water in the fish tank unit to remove suspended matter and bacteria in the aquaculture wastewater, and finally recycle it. At the same time, a rain shower unit with a double-layer structure is provided to preliminarily mix the suspended matter in the discharged wastewater and pass through holes with adjustable sizes. During the mixing process, large suspended matter in the wastewater is broken into small suspended matter, which is beneficial to the adsorption and removal in the sedimentation tank in the next step. The present invention has the advantages of recycling aquaculture water resources, and reduces the discharge of sewage into the environment, which is beneficial to maintaining the ecological balance of the surrounding environment. At the same time, the device structure is reasonably and effectively arranged, and the suspended pollutants in the aquaculture wastewater are pre-treated to facilitate filtration or adsorption removal, reducing the risk of blocking the filter.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture, and in particular relates to a circulating fish farming device. Background Art

[0002] Aquaculture refers to the breeding of fish or various seafood in artificial fish ponds on the shore. According to the different water quality, it can be divided into three categories: freshwater breeding, saltwater breeding and sea breeding. Common breeding includes milkfish, oysters and eels. The aquaculture industry is in a transition period from the traditional high-yield stocking model to large-scale breeding and quality and efficiency. However, since most aquaculture still adopts the large-scale drainage method, it not only greatly consumes water resources, but also polluted water formed by feed residues and fish, shrimp and crab excrement in the aquaculture process pollutes water bodies and pond bottom mud, making the aquaculture water increasingly eutrophic, causing more and more harm to the surrounding water environment and ecological environment. Therefore, the market is in urgent need of an ecological aquaculture device for rational use of water resources and protection of the ecological environment.

[0003] The Chinese invention patent with the patent publication number CN110272168A and the publication date of September 24, 2019 discloses a three-dimensional intelligent water treatment system, which includes a pretreatment system, a bacterial community re-cultivation system and a pH adjustment system which are sequentially connected and arranged along the sewage inlet route. The pretreatment system is configured to filter impurities and particulate matter in the water; the bacterial community re-cultivation system includes a sterilization unit located downstream of the pretreatment system and a probiotics breeding unit located downstream of the sterilization unit; the pH adjustment system includes a fine-grained biochemical ball treatment pool located downstream of the probiotics breeding unit, and the fine-grained biochemical ball treatment pool is configured to adjust the pH of the water. After pre-treatment of the aquaculture wastewater, impurities and particulate matter are filtered, the sterilization unit removes harmful viruses and harmful objects in the water body, the probiotics breeding unit re-cultivates probiotics that are beneficial to aquaculture, and finally the pH value of the water body is adjusted by the pH adjustment system. The water after the above purification treatment can be reused in aquaculture, and the waste of water resources and pollution to the environment are reduced by recycling water resources.

[0004] However, the disadvantage of this invention patent is that there is no pre-treatment process for the suspended pollutants in the aquaculture wastewater. The suspended particles are large and difficult to remove by filtration or adsorption. At the same time, there is a risk of clogging the filter during filtration. Summary of the invention

[0005] The purpose of the present invention is to provide a circulating fish farming device, which can remove suspended matter and bacteria in aquaculture wastewater through a fish tank unit for aquaculture and a sedimentation tank unit for circulating and purifying water in the fish tank unit, and finally recycle it. At the same time, a rain shower unit with a double-layer structure is provided to preliminarily mix the suspended matter in the discharged wastewater and pass through holes with adjustable sizes. During the mixing process, large suspended matter in the wastewater is broken into small suspended matter, which is beneficial to the adsorption and removal in the sedimentation tank in the next step. The present invention has the advantages of recycling aquaculture water resources, and reduces the discharge of sewage into the environment, which is beneficial to maintaining the ecological balance of the surrounding environment. At the same time, the device structure is reasonably and effectively arranged, and the suspended pollutants in the aquaculture wastewater are pre-treated to facilitate filtration or adsorption removal, reducing the risk of blocking the filter.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: a circulating fish farming device, including a fish tank unit for farming fish, a sedimentation tank unit for circulating and purifying water in the fish tank unit, and a shower unit connected to the fish tank unit for flowing water into the sedimentation tank unit.

[0007] A further preferred technical solution is that the fish tank unit includes a fish tank, an overflow pipe passing through the bottom of the fish tank and connected to the shower unit, and a fish tank drain port arranged at the bottom of the fish tank for discharging sediment.

[0008] A further preferred technical solution is that the sedimentation tank unit includes a primary sedimentation tank arranged below the shower unit, a secondary sedimentation tank connected to the primary sedimentation tank, a tertiary sedimentation tank connected to the secondary sedimentation tank, a fourth sedimentation tank connected to the tertiary sedimentation tank, a connecting pipe for connecting the primary sedimentation tank, the secondary sedimentation tank, the tertiary sedimentation tank and the fourth sedimentation tank, a sewage outlet arranged at the bottom of the sedimentation tank, a brush arranged in the primary sedimentation tank for absorbing suspended matter in the water, a first microparticle machine arranged in the secondary sedimentation tank for absorbing suspended matter in the water, a second microparticle machine arranged in the tertiary sedimentation tank for absorbing suspended matter in the water, the pore size of the particles in the first microparticle machine is larger than the pore size of the particles in the second microparticle machine, a first germicidal lamp arranged above the secondary sedimentation tank and behind the first microparticle machine, a second germicidal lamp arranged above the tertiary sedimentation tank and behind the second microparticle machine, and a reflux pipe connecting the fourth sedimentation tank and the fish tank unit.

[0009] A further preferred technical solution is that the shower unit includes a box body, a water inlet pipe portion arranged on the box body for water intake, a movable rod portion arranged in the box body for driving the water inlet pipe portion to move, a movable orifice plate portion arranged in the box body below the movable rod portion for adjusting the flow rate of falling water, a rotating disk portion connected to the movable rod portion and the movable orifice plate portion, and a fixed orifice plate arranged below the box body for dropping water into the primary sedimentation tank.

[0010] A further preferred technical solution is that the box body portion includes a box body, a box body opening arranged on the top of the box body for passing the water inlet pipe portion, a box body opening inner groove arranged on the inner side wall of the box body opening for engaging the water inlet pipe portion, a box body hole arranged on the box body for passing the rotating disk portion, and a box body hole inner groove arranged on the inner side wall of the box body hole for engaging the rotating disk portion.

[0011] A further preferred technical solution is that the water inlet pipe portion includes a water inlet hose connected to the bottom of the overflow pipe, a water inlet hard pipe connected to the water inlet hose, and a hard pipe clamping block arranged on the water inlet hard pipe and engaged with the inner groove of the box body opening.

[0012] A further preferred technical solution is that the movable rod portion includes a movable rod connecting block connected to the water inlet hard pipe, an internal threaded hole arranged on the movable rod connecting block, a movable screw threadedly connected to the internal threaded hole, a movable rod support sleeve arranged inside the box body for supporting the movable screw, a horizontal gear rod connected to the movable screw, horizontal teeth arranged on the horizontal gear rod, a vertical gear rod meshing with the horizontal teeth, a vertical first tooth arranged on the vertical gear rod meshing with the horizontal teeth, a vertical second tooth arranged on the vertical gear rod at the other end relative to the vertical first tooth and used to mesh with the rotating disk portion, and a vertical rod support sleeve arranged on the outer wall of the box body for supporting the upper and lower ends of the vertical gear rod.

[0013] A further preferred technical solution is that the rotating disk portion includes a hollow sliding gear meshing with the vertical second tooth, a hollow rotating disk connected to the hollow sliding gear, a pressing block arranged on the hollow rotating disk, a hollow sliding rod connected to the other end of the hollow sliding gear relative to the hollow rotating disk, a pair of annular locking blocks arranged on the hollow sliding rod for engaging the movable orifice plate portion, and a sliding rod locking block passing through the wall of the hollow sliding rod.

[0014] A further preferred technical solution is that the rotating disk part also includes a pressing block spring arranged inside the hollow rotating disk for lifting the pressing block, a pressing block connecting column connected to the pressing block, a rotating disk horizontal gear rod connected to the pressing block connecting column, a rotating disk horizontal tooth arranged on the rotating disk horizontal gear rod, a rotating disk sliding gear meshing with the rotating disk horizontal tooth and connected to the sliding rod engaging block, a rotating disk screw arranged on the rotating disk sliding gear on the other side of the sliding rod engaging block, a spring sleeve arranged inside the hollow rotating disk for engaging the pressing block spring, a horizontal gear rod engaging block arranged inside the hollow rotating disk for engaging the rotating disk horizontal gear rod, and a rotating disk internal thread groove arranged inside the hollow rotating disk for screwing the rotating disk screw.

[0015] A further preferred technical solution is that the movable orifice plate portion includes an upper fixed orifice plate arranged in the box body, a movable orifice plate arranged in the box body below the upper fixed orifice plate, a fixed clamping plate arranged on the bottom surface of the movable orifice plate and clamped in the middle of the annular clamping block, and a support rod for supporting the movable orifice plate to slide thereon.

[0016] The present invention uses a fish tank unit for breeding fish and a sedimentation tank unit for circulating and purifying the water in the fish tank unit to remove suspended matter and bacteria in the breeding wastewater, and finally recycles it. At the same time, a rain shower unit with a double-layer structure is provided to preliminarily mix the suspended matter in the discharged wastewater and pass through holes with adjustable sizes. During the mixing process, large suspended matter in the wastewater is broken into small suspended matter, which is beneficial to the adsorption and removal in the sedimentation tank in the next step. The present invention has the advantages of recycling aquaculture water resources, and reduces the discharge of sewage into the environment, which is beneficial to maintaining the ecological balance of the surrounding environment. At the same time, the device structure is reasonably and effectively arranged, and the suspended pollutants in the breeding wastewater are pre-treated to facilitate filtration or adsorption removal, reducing the risk of blocking the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the circulating fish culture device in the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the shower unit in the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the hollow rotating disk in the present invention.

[0020] Figure 4 It is a schematic structural diagram of the horizontal gear rod in the present invention.

[0021] Figure 5 It is a schematic diagram of the structure of the movable screw in the present invention.

[0022] Figure 6 It is a structural schematic diagram of the position of the annular engaging block in the present invention.

[0023] Figure 7 It is a structural schematic diagram of the groove position in the box hole of the present invention.

[0024] Figure 8 It is a schematic diagram of the structure of the internal components of the rotating disk part in the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure inside the rotating disk part of the present invention.

[0026] Fig.10 It is a structural schematic diagram of the movable orifice plate in the present invention.

[0027] Fig.11 It is a schematic diagram of the structure of the water inlet hose in the present invention.

[0028] Fig.12 It is a structural schematic diagram of the box opening position in the present invention. DETAILED DESCRIPTION

[0029] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0030] Example: As attached Figure 1 , 2 ,3,4,5,6,7,8,9,10,11 and attached Fig.12 As shown, a circulating fish farming device includes a fish tank unit 11 for farming fish, a sedimentation tank unit 1 for circulating and purifying water in the fish tank unit 11, and a shower unit 2 connected to the fish tank unit 11 for flowing water into the sedimentation tank unit 1.

[0031] In this embodiment, various aquatic products, such as milkfish, oysters, eels, etc., are cultured in the fish tank unit 11. The fish tank unit 11 discharges sewage into the sedimentation tank unit 1 through the shower unit 2 and purifies it. The purified sewage returns to the fish tank unit 11 through the pipeline, thereby completing the reuse of water resources.

[0032] The fish tank unit 11 includes a fish tank 11a, an overflow pipe 11b passing through the bottom of the fish tank 11a and connected to the shower unit 2, and a fish tank drain port 11c disposed at the bottom of the fish tank 11a for discharging sediment.

[0033] In this embodiment, the top of the overflow pipe 11b includes a port, which is located slightly below the top of the fish tank 11a. The position of the overflow pipe 11b determines the position of the horizontal plane of the fish tank 11a. When the water in the fish tank 11a exceeds the top port of the overflow pipe 11b, it will flow out of the overflow pipe 11b. The purpose of setting the fish tank sewage outlet 11c is that some suspended matter cannot enter the shower unit 2 through the overflow pipe 11b, and the suspended matter at the bottom of the pool needs to be cleaned regularly through the fish tank sewage outlet 11c to avoid deterioration of the living environment of fish.

[0034] The sedimentation tank unit 1 includes a primary sedimentation tank 101 disposed below the shower unit 2, a secondary sedimentation tank 102 connected to the primary sedimentation tank 101, a tertiary sedimentation tank 103 connected to the secondary sedimentation tank 102, a quaternary sedimentation tank 104 connected to the tertiary sedimentation tank 103, a connecting pipe 110 for connecting the primary sedimentation tank 101, the secondary sedimentation tank 102, the tertiary sedimentation tank 103 and the quaternary sedimentation tank 104, a sewage outlet 114 disposed at the bottom of the sedimentation tank, a brush 105 disposed in the primary sedimentation tank 101 for absorbing suspended matter in the water, and a brush 105 disposed in the secondary sedimentation tank 102. a first microparticle machine 106 for absorbing suspended matter in the water in the first sedimentation tank 102, a second microparticle machine 107 for absorbing suspended matter in the water in the tertiary sedimentation tank 103, the particle pore size of the first microparticle machine 106 being larger than the particle pore size of the second microparticle machine 107, a first germicidal lamp 108 being arranged above the secondary sedimentation tank 102 and behind the first microparticle machine 106, a second germicidal lamp 109 being arranged above the tertiary sedimentation tank 103 and behind the second microparticle machine 107, and a reflux pipe 113 for connecting the quaternary sedimentation tank 104 and the fish tank unit 11.

[0035] In this embodiment, the sedimentation tank unit 1 is composed of four sedimentation tanks from level one to level four. The sedimentation tanks of low level have higher efficiency in removing pollutants, but lower degree of removal. The sedimentation tanks of high level have deeper degree of pollutant removal, but lower removal efficiency. Combining these sedimentation tanks together can more effectively remove pollutants in sewage. The brush 105, the first micro-particle machine 106 and the second micro-particle machine 107 are filtering devices in the sedimentation tank. The brush 105 can absorb a large amount of pollutants in sewage, but it is limited to the adsorption of suspended solids with larger particles, and the adsorption is not stable enough and easy to fall off. The particles in the first micro-particle machine 106 are 60-1 The particles in the second micro-particle machine 107 are between 120-200 meshes, which are used to absorb the suspended matter not absorbed by the brush 105 and the first micro-particle machine 106. The first germicidal lamp 108 and the second germicidal lamp 109 are ultraviolet germicidal lamps, respectively, wherein the power of the second germicidal lamp 109 is higher than that of the first germicidal lamp 108, in order to deeply sterilize the sewage before it enters the fourth sedimentation tank 104. The fourth sedimentation tank 104 is added with nitrifying bacteria, denitrifying bacteria and other COD degrading bacteria, etc., to further reduce the COD index and nitrogen content in the sewage.

[0036] In addition, a lifting pump is installed in the return pipe 113, which is used to pump the sewage treated by the fourth-stage sedimentation tank 104 back to the fish tank 11a to complete the circulation process. The purpose of setting the sewage outlet 114 is that some suspended matter cannot be adsorbed and sink to the bottom of the water, and needs to be cleaned regularly through the sewage outlet 114.

[0037] The shower unit 2 includes a box body 201, a water inlet pipe portion 202 arranged on the box body 201 for water intake, a movable rod portion 203 arranged in the box body 201 for driving the water inlet pipe portion 202 to move, a movable orifice plate portion 204 arranged in the box body 201 below the movable rod portion 203 for adjusting the flow rate of falling water, a rotating disk portion 205 connected to the movable rod portion 203 and the movable orifice plate portion 204, and a fixed orifice plate 206 arranged below the box body 201 for dropping water into the primary sedimentation tank 101.

[0038] In this embodiment, the water inlet pipe portion 202 pours the sewage in the fish tank 11a onto the movable orifice plate portion 204, and the position of the water inlet pipe portion 202 and the size of the holes of the movable orifice plate portion 204 are simultaneously controlled by the turntable portion 205, thereby adjusting the degree of broken up of suspended matter and the operating efficiency, and the evenly mixed sewage is poured into the primary sedimentation tank 101 through the fixed orifice plate 206.

[0039] The box body portion 201 includes a box body 201a, a box body opening 201b arranged on the top of the box body 201a for passing the water inlet pipe portion 202, a box body opening inner groove 201c arranged on the inner wall of the box body opening 201b for engaging the water inlet pipe portion 202, a box body hole 201d arranged on the box body 201a for passing the rotating disk portion 205, and a box body hole inner groove 201e arranged on the inner wall of the box body hole 201d for engaging the rotating disk portion 205.

[0040] The water inlet pipe part 202 includes a water inlet hose 202a connected to the bottom of the overflow pipe 11b, a water inlet hard pipe 202b connected to the water inlet hose 202a, and a hard pipe clamping block 202c arranged on the water inlet hard pipe 202b and clamped with the inner groove 201c of the box body.

[0041] In this embodiment, the water inlet hard pipe 202b moves along the box body opening 201b by the force of the movable rod 203, and the hard pipe clamping block 202c moves smoothly in the inner groove 201c of the box body opening.

[0042] The movable rod portion 203 includes a movable rod connecting block 203a connected to the water inlet hard pipe 202b, an internal threaded hole 203j provided on the movable rod connecting block 203a, a movable screw rod 203b threadedly connected to the internal threaded hole 203j, a movable rod supporting sleeve 203c provided inside the box body 201a for supporting the movable screw rod 203b, a horizontal gear rod 203d connected to the movable screw rod 203b, and a horizontal gear rod 203d provided on the horizontal gear rod 203d. 203e, a vertical gear rod 203f meshing with the horizontal gear 203e, a vertical first tooth 203g arranged on the vertical gear rod 203f and meshing with the horizontal gear 203e, a vertical second tooth 203h arranged on the vertical gear rod 203f at the other end relative to the vertical first tooth 203g and used for meshing with the rotating disk portion 205, and a vertical rod support sleeve 203i arranged on the outer wall of the box body 201a for supporting the upper and lower ends of the vertical gear rod 203f.

[0043] In this embodiment, if the water inlet hard pipe 202b is moved along the box body opening 201b, the rotating disk portion 205 is rotated to move the vertical second tooth 203h downward or upward, driving the vertical first tooth 203g to move upward or downward, and then driving the horizontal tooth 203e to rotate, thereby driving the movable screw 203b to rotate, and the internal threaded hole 203j moves left or right under the action of the movable screw 203b, driving the movable rod connecting block 203a to move left or right, thereby driving the water inlet hard pipe 202b to move along the box body opening 201b.

[0044] The rotating disk portion 205 includes a hollow sliding gear 205a meshing with the vertical second tooth 203h, a hollow rotating disk 205b connected to the hollow sliding gear 205a, a pressing block 205c arranged on the hollow rotating disk 205b, a hollow sliding rod 205d connected to the other end of the hollow sliding gear 205a relative to the hollow rotating disk 205b, a pair of annular locking blocks 205e arranged on the hollow sliding rod 205d for locking the movable orifice plate portion 204, and a sliding rod locking block 205f passing through the wall of the hollow sliding rod 205d.

[0045] The rotating disk part 205 also includes a pressing block spring 205g arranged inside the hollow rotating disk 205b for lifting the pressing block 205c, a pressing block connecting column 205h connected to the pressing block 205c, a rotating disk horizontal gear rod 205i connected to the pressing block connecting column 205h, a rotating disk horizontal gear 205j arranged on the rotating disk horizontal gear rod 205i, a rotating disk sliding gear 205k meshing with the rotating disk horizontal gear 205j and connected to the sliding rod engaging block 205f, A rotating disk screw 205l is arranged on the other side of the rotating disk sliding gear 205k relative to the sliding rod locking block 205f, a spring sleeve 205m is arranged inside the hollow rotating disk 205b for locking the pressing block spring 205g, a horizontal gear rod locking block 205n is arranged inside the hollow rotating disk 205b for locking the rotating disk horizontal gear rod 205i, and a rotating disk internal thread groove 205o is arranged inside the hollow rotating disk 205b for screwing the rotating disk screw 205l.

[0046] The movable orifice plate portion 204 includes an upper fixed orifice plate 204a arranged in the box body 201a, a movable orifice plate 204b arranged in the box body 201a and located below the upper fixed orifice plate 204a, a fixed clamping plate 204c arranged on the bottom surface of the movable orifice plate 204b and clamped in the middle of the annular clamping block 205e, and a support rod 204d for supporting the movable orifice plate 204b to slide thereon.

[0047] In this embodiment, when the sliding rod engaging block 205f is engaged with the inner groove 201e of the box hole close to the outer wall of the box body 201a, the holes of the upper fixed orifice plate 204a and the movable orifice plate 204b are completely aligned, and the effective water passage area is maximized; when the sliding rod engaging block 205f is engaged with the inner groove 201e of the box hole close to the inner wall of the box body 201a, the holes of the upper fixed orifice plate 204a and the movable orifice plate 204b are staggered, reducing the effective water passage area.

[0048] In addition, the pressing block 205c can control the up and down movement of the sliding rod engaging block 205f, so that the sliding rod engaging block 205f is separated from the inner groove 201e of the box hole. When the pressing block 205c is pressed down, the pressing block spring 205g is compressed, and the rotating disk horizontal gear rod 205i moves in the pressing direction driven by the pressing block connecting column 205h, and the rotating disk horizontal gear 205j drives the rotating disk sliding gear 205 k rotates, and under the action of the screw connection between the rotating disk screw 205l and the internal thread groove 205o of the rotating disk, the sliding rod locking block 205f moves downward, thereby disengaging from the inner groove 201e of the box hole. At this time, the hollow rotating disk 205b is pushed, and the hollow sliding rod 205d moves inward. When the pressing block 205c is released, the sliding rod locking block 205f enters the inner groove 201e of the box hole close to the box 201a, completing the switching process.

[0049] The above is a detailed description of the embodiments of the present invention, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A circulating fish farming device, comprising a fish tank unit (11) for farming fish, characterized in that: The fish tank unit (11) further comprises a sedimentation tank unit (1) for circulating and purifying water in the fish tank unit (11), and a shower unit (2) connected to the fish tank unit (11) for flowing water into the sedimentation tank unit (1); the fish tank unit (11) comprises a fish tank (11a), an overflow pipe (11b) passing through the bottom of the fish tank (11a) and connected to the shower unit (2), and a fish tank drain port (11c) arranged at the bottom of the fish tank (11a) for discharging sediment; the sedimentation tank unit (1) comprises a primary sedimentation tank (101) arranged below the shower unit (2), and connected to the primary sedimentation tank (102). 1) a secondary sedimentation tank (102) connected to the secondary sedimentation tank (102), a tertiary sedimentation tank (103) connected to the secondary sedimentation tank (102), a quaternary sedimentation tank (104) connected to the tertiary sedimentation tank (103), a connecting pipe (110) for connecting the primary sedimentation tank (101), the secondary sedimentation tank (102), the tertiary sedimentation tank (103) and the quaternary sedimentation tank (104), a sewage outlet (114) arranged at the bottom of the sedimentation tank, a brush (105) arranged in the primary sedimentation tank (101) for absorbing suspended matter in water, a first microparticle machine (105) arranged in the secondary sedimentation tank (102) for absorbing suspended matter in water 6), a second microparticle machine (107) for absorbing suspended matter in water arranged in the tertiary sedimentation tank (103), the microparticle pore size in the first microparticle machine (106) being larger than the microparticle pore size in the second microparticle machine (107), a first germicidal lamp (108) arranged above the secondary sedimentation tank (102) and behind the first microparticle machine (106), a second germicidal lamp (109) arranged above the tertiary sedimentation tank (103) and behind the second microparticle machine (107), and a return pipe (113) for connecting the quaternary sedimentation tank (104) and the fish tank unit (11); the shower unit (2) includes The invention comprises a box body (201), a water inlet pipe (202) arranged on the box body (201) for water inlet, a movable rod (203) arranged in the box body (201) for driving the water inlet pipe (202) to move, a movable orifice plate (204) arranged in the box body (201) below the movable rod (203) for adjusting the flow rate of falling water, a rotating disk (205) connected to the movable rod (203) and the movable orifice plate (204), and a fixed orifice plate (206) arranged below the box body (201) for causing water to fall into the primary sedimentation tank (101);The box body (201) comprises a box body (201a), a box body opening (201b) arranged at the top of the box body (201a) for passing the water inlet pipe (202), a box body opening inner groove (201c) arranged on the inner side wall of the box body opening (201b) for engaging the water inlet pipe (202), a box body hole (201d) arranged on the box body (201a) for passing the rotating disk (205), and a box body hole inner groove (201e) arranged on the inner side wall of the box body hole (201d) for engaging the rotating disk (205); the water inlet pipe (202) comprises a water inlet hose (201e) connected to the bottom of the overflow pipe (11b). 2a), a water inlet hard pipe (202b) connected to the water inlet hose (202a), and a hard pipe engaging block (202c) arranged on the water inlet hard pipe (202b) and engaging with the inner groove (201c) of the housing mouth; the movable rod portion (203) comprises a movable rod connecting block (203a) connected to the water inlet hard pipe (202b), an internal threaded hole (203j) arranged on the movable rod connecting block (203a), a movable screw rod (203b) threadedly connected to the internal threaded hole (203j), a movable rod supporting sleeve (203c) arranged inside the housing (201a) and used for supporting the movable screw rod (203b), and a movable rod supporting sleeve (203c) engaged with the movable screw rod (201c). 3b), a horizontal gear rod (203d) connected to the housing (201a), a horizontal tooth (203e) arranged on the horizontal gear rod (203d), a vertical gear rod (203f) meshing with the horizontal tooth (203e), a vertical first tooth (203g) arranged on the vertical gear rod (203f) meshing with the horizontal tooth (203e), a vertical second tooth (203h) arranged on the other end of the vertical gear rod (203f) relative to the vertical first tooth (203g) and used to mesh with the rotating disk portion (205), and a vertical rod support sleeve (203i) arranged on the outer wall of the housing (201a) and used to support the upper and lower ends of the vertical gear rod (203f); The rotating disk portion (205) comprises a hollow sliding gear (205a) meshing with the vertical second tooth (203h), a hollow rotating disk (205b) connected to the hollow sliding gear (205a), a pressing block (205c) arranged on the hollow rotating disk (205b), a hollow sliding rod (205d) connected to the other end of the hollow sliding gear (205a) relative to the hollow rotating disk (205b), a pair of annular engaging blocks (205e) arranged on the hollow sliding rod (205d) for engaging with the movable orifice plate portion (204), and a sliding rod engaging block (205f) passing through the wall of the hollow sliding rod (205d);The rotating disk portion (205) further comprises a pressing block spring (205g) arranged inside the hollow rotating disk (205b) for lifting the pressing block (205c), a pressing block connecting column (205h) connected to the pressing block (205c), a rotating disk horizontal gear rod (205i) connected to the pressing block connecting column (205h), a rotating disk horizontal gear (205j) arranged on the rotating disk horizontal gear rod (205i), a rotating disk sliding gear (205k) meshing with the rotating disk horizontal gear (205j) and connected to the sliding rod engaging block (205f), a rotating disk screw (205l) arranged on the other side of the rotating disk sliding gear (205k) relative to the sliding rod engaging block (205f), and a rotating disk screw (205l) arranged inside the hollow rotating disk (205b) for engaging the pressing block spring (205g). 5g), a spring sleeve (205m) arranged inside the hollow rotating disk (205b) for engaging the horizontal gear rod (205i) of the rotating disk, and a rotating disk internal thread groove (205o) arranged inside the hollow rotating disk (205b) for screwing the rotating disk screw rod (205l); the movable orifice plate portion (204) comprises an upper fixed orifice plate (204a) arranged in the box body (201a), a movable orifice plate (204b) arranged in the box body (201a) below the upper fixed orifice plate (204a), a fixed engaging plate (204c) arranged on the bottom surface of the movable orifice plate (204b) and engaged in the middle of the annular engaging block (205e), and a support rod (204d) for supporting the movable orifice plate (204b) to slide thereon; The overflow pipe (11b) has a port at the top thereof, and the port is located slightly below the top of the fish tank (11a). When the water in the fish tank (11a) exceeds the port at the top of the overflow pipe (11b), the water will flow out of the overflow pipe (11b); A lift pump is installed in the return pipe (113).

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