Aquatic seedling raising method and water changing device

Abstract

The invention relates to the technical field of aquaculture auxiliary equipment, and discloses an aquaculture seedling method and a water changing device, including a support assembly, an isolation assembly fixedly mounted on the top of the support assembly, and a water changing assembly fixedly mounted on the top of the support assembly. The turntable rotates clockwise, and the turntable drives the umbrella seat to rotate through the locking rod 1, and is connected to the outer edge of the support rod through a round tube, and the push rod and the inner wall of the guide groove are slidably connected, and the isolation tube 2 and the isolation tube 1 are slidably connected, so that the push rod drives the isolation tube 2 to move up and down through the guide groove, so that water flows into the space between the isolation assembly and the support assembly through the top of the isolation tube 2, and the threaded leaf is driven to rotate through the round tube, so that the threaded leaf drives the water to spray to the top of the water changing assembly through the guide groove to the feeding assembly, and with the diversion of the spreading leaf, the water is sprayed in the air in an umbrella shape, so as to increase the dissolved oxygen content in the water, promote the degradation of organic matter in the sewage, and maintain the activity of microorganisms in the water treatment system.

Description

Technical Field

[0001] The invention relates to the technical field of aquaculture auxiliary equipment, in particular to an aquaculture seedling raising method and a water changing device. Background Art

[0002] Aquaculture is the production activity of breeding, cultivating and harvesting aquatic animals and plants under human control. It generally includes the whole process of growing aquatic products from seedlings under artificial breeding and management. In a broad sense, it can also include the proliferation of aquatic resources.

[0003] In the process of raising seedlings in some intensive and high-density aquaculture, the organic matter in the water cannot be purified by the water body. In the long run, it will gradually pollute the water quality, and even cause the death of farmed animals and plants, resulting in unnecessary losses. Therefore, in order to ensure the freshness of the water quality and the health of animals and plants, it is necessary to change the water regularly.

[0004] Existing water exchange devices often pump water through water pumps. First, direct pumping will cause other debris to enter the device, causing pipe blockage and device damage. At the same time, the method of directly replacing the water body will cause a large amount of water waste. Therefore, a device is proposed to promote the degradation of organic matter in sewage, maintain the activity of microorganisms in the water treatment system, and indirectly achieve water quality optimization in the pool. Summary of the invention

[0005] The present invention provides an aquatic seedling raising method and a water changing device, which solve the problems raised by the above-mentioned background technology.

[0006] The present invention provides the following technical solution: a water changing device, comprising a supporting assembly, the top of which is fixedly equipped with an isolation assembly, the top of which is fixedly equipped with a water changing assembly, and the top of which is fixedly equipped with a feeding assembly.

[0007] As a preferred technical solution of the present invention: the support assembly includes a sealing seat, a motor is fixedly mounted on the bottom inner wall of the sealing seat, a connecting seat is fixedly mounted on the power output shaft of the motor, a rotating shaft is fixedly mounted on the top of the connecting seat, and a supporting rod is fixedly mounted on the top of the sealing seat;

[0008] The rotating shaft is located in the inner cavity of the support rod, a bearing is arranged on the outer edge of the rotating shaft, and the rotating shaft is rotatably connected to the support rod through the bearing.

[0009] As a preferred technical solution of the present invention: the isolation assembly includes an isolation tube 1, one end of a fixing rope is fixedly mounted on the bottom outer edge of the isolation tube 1, the other end of the fixing rope is fixedly mounted on a floating ring, the top outer edge of the isolation tube 1 is slidably sleeved with an isolation tube 2, the top outer edge of the isolation tube 2 is provided with a wire seat, the outer edge of the wire seat is provided with a guide groove, the inner wall of the guide groove is slidably sleeved with a push rod, and the guide groove is arranged in a wave shape;

[0010] The wire holder is fixedly assembled through a fixing structure and the second isolation tube, and the push rod is fixedly assembled with the bottom of the water changing assembly.

[0011] As a preferred technical solution of the present invention: the water changing assembly includes a round tube, the inner wall of the round tube is provided with a threaded leaf, the top of the round tube is fixedly equipped with an umbrella seat, the top of the umbrella seat is annularly provided with a plurality of leafs, the inner cavity of the umbrella seat is provided with a guide groove, the middle inner cavity of the umbrella seat is provided with a turntable, the outer wall of the turntable is provided with a limited position slide groove, the inner cavity of the limited position slide groove is slidably sleeved with a locking rod, and the inner wall of the umbrella seat close to the turntable is provided with a clamping seat;

[0012] A plurality of the clamping seats are annularly opened on the inner wall of the umbrella seat, a plurality of the guide grooves are annularly arranged in the inner cavity of the umbrella seat, and the two ends of the guide grooves are located between the two groups of leaves;

[0013] The inner cavity formed by the limiting slide groove 1 and any group of the card seats is adapted to the locking rod 1, and the length of the locking rod 1 is half of the length of the inner cavity of the limiting slide groove 1;

[0014] The rotating disk and the rotating shaft are fixedly assembled, the inner cavity of the umbrella seat is inlaid with a bearing, and the umbrella seat is rotatably connected with the rotating shaft through the bearing, and the umbrella seat and the supporting rod are located at the same axis.

[0015] As a preferred technical solution of the present invention: the feeding component includes a storage bin, the bottom inner cavity of the storage bin is provided with two limiting slide grooves, the inner cavities on both sides of the storage bin are provided with movable grooves, the inner cavity of the movable groove is provided with a discharge port, the inner wall of the movable groove is slidably sleeved with a partition, the outer wall of the partition is fixedly equipped with one end of a steel wire, the other end of the steel wire is fixedly equipped with two locking rods, the two locking rods are arranged on the inner wall of the two limiting slide grooves, and the length of the two locking rods is one half of the length of the two limiting slide grooves.

[0016] As a preferred technical solution of the present invention: the steel wire is slidably sleeved in the inner cavity of the storage bin, the discharge port is arranged on the side of the movable groove away from the steel wire, and the storage bin and the support assembly are fixedly assembled.

[0017] A method for raising aquatic seedlings comprises the following steps:

[0018] 1) Prepare the seedling raising environment conditions

[0019] 2) Fish egg hatching

[0020] Place the eggs in a cylindrical plastic bucket for incubation, place an air stone in the middle bottom, the water temperature is 26-32℃, and the egg density is 31-1.5 million eggs / m;

[0021] 3) Fry cultivation

[0022] 2-4 days after the fry are hatched, the hatched fish are picked out and placed in cement pools for cultivation according to the opening of the fry's eyes. The cement pools are filled with fresh filtered and sterilized seawater, without fertilizer, and the cultivation density is 18,000-22,000 fish / m;

[0023] 4) Daily management

[0024] The motor drives the turntable to rotate through the rotating shaft by fixing the rotating shaft and the turntable, and the limiting slide groove is tilted so that when the turntable rotates clockwise, the locking rod located in the inner cavity of the limiting slide groove is affected by the centrifugal force, so that the locking rod slides to one side of the card seat, and then the locking rod and the card seat are engaged, so that the turntable drives the umbrella seat to rotate through the locking rod, and the round tube is sleeved on the outer edge of the support rod, and the push rod and the inner wall of the guide groove are slidably sleeved, and the isolation tube 2 and the isolation tube 1 are slidably sleeved, so that the push rod drives the isolation tube 2 to move up and down through the guide groove, thereby the isolation tube 2 The outer edge of the top of the water exchanger circulates in a state where the water is flush with the water surface and below the water surface. The water flows into the space between the isolation component and the support component through the top of the isolation pipe 2 through the up and down movement of the isolation pipe 2. At this time, the screw leaf is driven to rotate by the round pipe, so that the screw leaf drives the water to spray to the feeding component through the guide groove. After the water contacts the bottom of the feeding component, it flows into the top of the water exchange component. With the diversion of the spreading leaf, the water is sprayed into the air in an umbrella shape, carrying oxygen into the water pool, so as to increase the dissolved oxygen content in the water, promote the degradation of organic matter in the sewage, and maintain the activity of microorganisms in the water treatment system.

[0025] After the fry opens its eyes, the support assembly drives the turntable to rotate counterclockwise, and the locking rod 1 located in the inner cavity of the limiting slide groove 1 is affected by the centrifugal force, so that the locking rod 1 slides away from the clamping seat, thereby separating the locking rod 1 from the clamping seat;

[0026] When the supporting assembly drives the feeding assembly to rotate counterclockwise, the locking rod 2 moves inward by centrifugal force, and then drives the partition through the steel wire, so that the partition moves to the side of the moving groove away from the discharge port, so that the fish food in the inner cavity of the storage bin is scattered through the discharge port to start feeding the bait.

[0027] As a preferred technical solution of the present invention: the preparation of the seedling raising environment conditions specifically includes:

[0028] 1.1) Cement pool

[0029] Several square cement pools with an area of ​​4-16 square meters, the bottom and wall of the cement pools are smooth, the water depth is 50-80 cm, several irregular cement blocks are placed in each cement pool, several plastic plates are placed on the water surface, and the specifications are 15-30 cm long and 15-30 cm wide. Each cement pool is placed with a water changing device;

[0030] 1.2) Seedling environment

[0031] The dissolved oxygen is above 5 mg / L, the pH value is 7.8-8.2, the water specific gravity is 1.020-1.022, the water temperature is 26-32℃, the light intensity is 1000-3000lx, the indoor light is adjustable, and a good ventilation environment is maintained for seedling cultivation.

[0032] As a preferred technical solution of the present invention: the preparation of the seedling raising environment conditions also includes:

[0033] 1.3) Cleaning and disinfection of cement pools, cement blocks, plastic plates and other culture tools: clean with oxalic acid, first disinfect with high concentration of chlorine dioxide, rinse with fresh water, then fill with fresh water and disinfect again with water, using 2ppm, finally, drain the water and rinse with fresh water 3 times;

[0034] 1.4) Cultivation of fish bait and feed

[0035] One month before egg laying, start cultivating Chlorella, Platymonas, and Rotifer bait, and place the bait in the inner cavity of the feeding component (4).

[0036] The present invention has the following beneficial effects:

[0037] 1. The aquatic seedling raising method and water changing device are fixedly assembled by a rotating shaft and a rotating disk, so that the motor drives the rotating disk to rotate through the rotating shaft, and the limiting slide groove is tilted so that when the rotating disk rotates clockwise, the locking rod located in the inner cavity of the limiting slide groove is affected by the centrifugal force, so that the locking rod slides toward the side of the card seat, and then the locking rod and the card seat are engaged, so that the rotating disk drives the umbrella seat to rotate through the locking rod, and the round tube is sleeved on the outer edge of the support rod, and the push rod is slidably sleeved with the inner wall of the guide groove, and the isolation tube 2 is slidably sleeved with the isolation tube 1, so that the push rod drives the isolation tube 2 to move up and down through the guide groove. , and then the outer edge of the top of the isolation pipe 2 is in a state of being flush with the water surface and below the water surface to circulate, and the isolation pipe 2 moves up and down, so that the water flows into the space between the isolation component and the support component through the top of the isolation pipe 2. At this time, the threaded leaf is driven to rotate by the round tube, so that the threaded leaf drives the water to spray to the feeding component through the guide groove. After the water contacts the bottom of the feeding component, it flows into the top of the water changing component. With the diversion of the spreading leaf, the water is sprayed into the air in an umbrella shape, carrying oxygen into the water pool, so as to increase the dissolved oxygen content in the water, promote the degradation of organic matter in the sewage, and maintain the activity of microorganisms in the water treatment system;

[0038] On the other hand, the support assembly drives the turntable to rotate counterclockwise, and the locking rod 1 located in the inner cavity of the limiting slide groove 1 is affected by the centrifugal force, so that the locking rod 1 slides away from the card seat, thereby separating the locking rod 1 from the card seat;

[0039] When the supporting assembly drives the feeding assembly to rotate counterclockwise, the locking rod 2 moves inward by centrifugal force, and then drives the partition through the steel wire, so that the partition moves to the side of the moving groove away from the discharge port, so that the fish food in the inner cavity of the storage bin is scattered through the discharge port to start feeding the bait. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0041] Figure 2 It is a schematic diagram of the structure of the present invention 4;

[0042] Figure 3 It is a schematic diagram of the structure of the present invention 2;

[0043] Figure 4 3 is a schematic diagram of the cross-sectional structure of the present invention;

[0044] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the present invention 3;

[0045] Figure 6 It is another partial cross-sectional structural schematic diagram of the present invention 3;

[0046] Figure 7It is a partial perspective structural diagram of the present invention 3;

[0047] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at A in the middle;

[0048] Fig. 9 It is a perspective structural diagram of the present invention 4;

[0049] Fig.10 It is a schematic diagram of the structure 405 of the present invention.

[0050] In the figure: 1. Support component; 2. Isolation component; 3. Water change component; 4. Feeding component;

[0051] 101, sealing seat; 102, motor; 103, connecting seat; 104, rotating shaft; 105, supporting rod;

[0052] 201, isolation tube 1; 202, fixing rope; 203, floating ring; 204, isolation tube 2; 205, wire seat; 206, guide groove; 207, push rod;

[0053] 301, round tube; 302, threaded leaf; 303, umbrella seat; 304, leaf; 305, guide groove; 306, turntable; 307, limit slide groove 1; 308, locking rod 1; 309, holder;

[0054] 401, storage bin; 402, limiting slide groove 2; 403, moving groove; 404, discharge port; 405, partition; 406, steel wire; 407, locking rod 2. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] See also Figure 1 - Fig.10 A water changing device comprises a supporting assembly 1, an isolation assembly 2 is fixedly mounted on the top of the supporting assembly 1, a water changing assembly 3 is fixedly mounted on the top of the supporting assembly 1, and a feeding assembly 4 is fixedly mounted on the top of the water changing assembly 3.

[0057] In a preferred embodiment: the support assembly 1 includes a sealing seat 101, a motor 102 is fixedly mounted on the bottom inner wall of the sealing seat 101, a connecting seat 103 is fixedly mounted on the power output shaft of the motor 102, a rotating shaft 104 is fixedly mounted on the top of the connecting seat 103, and a supporting rod 105 is fixedly mounted on the top of the sealing seat 101;

[0058] The rotating shaft 104 is located in the inner cavity of the supporting rod 105 , a bearing is disposed on the outer edge of the rotating shaft 104 , and the rotating shaft 104 is rotatably connected to the supporting rod 105 via the bearing.

[0059] In the above structure, the motor 102 drives the rotating shaft 104, so that the rotating shaft 104 drives the water changing assembly 3 to rotate.

[0060] In a preferred embodiment: the isolation assembly 2 includes an isolation tube 1 201, one end of a fixing rope 202 is fixedly mounted on the bottom outer edge of the isolation tube 1 201, the other end of the fixing rope 202 is fixedly mounted with a floating ring 203, an isolation tube 204 is slidably sleeved on the top outer edge of the isolation tube 1 201, a wire seat 205 is arranged on the top outer edge of the isolation tube 204, a guide groove 206 is provided on the outer edge of the wire seat 205, a push rod 207 is slidably sleeved on the inner wall of the guide groove 206, and the guide groove 206 is arranged in a wave shape;

[0061] The wire holder 205 is fixedly assembled with the fixing structure and the second isolation tube 204 , and the push rod 207 is fixedly assembled with the bottom of the water changing assembly 3 .

[0062] In the above structure, the wire holder 205 is fixedly assembled with the isolation tube 204 through the fixed structure, so that the height position of the wire holder 205 installed on the isolation tube 204 can be changed through the fixed structure, and the floating ring 203 is fixed by the fixed rope 202. The buoyancy of the floating ring 203 in the water is utilized to isolate foreign objects on the water surface, so that foreign objects on the water surface will not flow through the top of the isolation tube 204 to the inner cavity of the isolation tube 204.

[0063] In a preferred embodiment: the water changing assembly 3 includes a circular tube 301, the inner wall of the circular tube 301 is provided with a threaded leaf 302, the top of the circular tube 301 is fixedly equipped with an umbrella seat 303, the top of the umbrella seat 303 is provided with a plurality of sprinkler leaves 304 in an annular shape, the inner cavity of the umbrella seat 303 is provided with a guide groove 305, the middle inner cavity of the umbrella seat 303 is provided with a turntable 306, the outer wall of the turntable 306 is provided with a limited position slide groove 307, the inner cavity of the limited position slide groove 307 is slidably sleeved with a locking rod 308, and the inner wall of the umbrella seat 303 close to the turntable 306 is provided with a clamping seat 309;

[0064] A plurality of clamping seats 309 are annularly provided on the inner wall of the umbrella seat 303, a plurality of guide grooves 305 are annularly provided in the inner cavity of the umbrella seat 303, and two ends of the guide grooves 305 are located between the two sets of leaflets 304;

[0065] The inner cavity formed by the limiting slide groove 1 307 and any group of the clamping seats 309 is adapted to the locking rod 1 308 , and the length of the locking rod 1 308 is half of the inner cavity length of the limiting slide groove 1 307 ;

[0066] The turntable 306 and the rotating shaft 104 are fixedly assembled, the inner cavity of the umbrella seat 303 is inlaid with a bearing, and the umbrella seat 303 is rotatably connected to the rotating shaft 104 through the bearing, and the umbrella seat 303 and the supporting rod 105 are located at the same axis.

[0067] In the above structure, the rotating shaft 104 and the rotating disk 306 are fixedly assembled, so that the motor 102 drives the rotating disk 306 to rotate through the rotating shaft 104, and the limiting slide groove 307 is tilted so that when the rotating disk 306 rotates clockwise, the locking rod 308 located in the inner cavity of the limiting slide groove 307 is affected by the centrifugal force, so that the locking rod 308 slides to the side of the clamping seat 309, and then the locking rod 308 and the clamping seat 309 are clamped, so that the rotating disk 306 drives the umbrella seat 303 to rotate through the locking rod 308, and the circular tube 301 is sleeved on the outer edge of the support rod 105, and the push rod 207 is slidably sleeved with the inner wall of the guide groove 206, and the isolation tube 204 and the isolation tube 1 201 are slidably sleeved, so that the push rod 207 passes through the guide groove 206 drives the isolation tube 204 to move up and down, so that the top outer edge of the isolation tube 204 is in two states of being flush with the water surface and below the water surface, and the isolation tube 204 moves up and down, so that the water flows into the space between the isolation component 2 and the support component 1 through the top of the isolation tube 204. At this time, the threaded leaf 302 is driven to rotate by the circular tube 301, so that the threaded leaf 302 drives the water to spray to the feeding component 4 through the guide groove 305. After the water contacts the bottom of the feeding component 4, it flows into the top of the water changing component 3. With the guidance of the spreading leaf 304, the water is sprayed into the air in an umbrella shape, carrying oxygen into the water pool, so as to increase the dissolved oxygen content in the water, promote the degradation of organic matter in the sewage, and maintain the activity of microorganisms in the water treatment system;

[0068] When the support assembly 1 drives the water changing assembly 3 to rotate counterclockwise, the locking rod 308 located in the inner cavity of the limiting slide groove 307 is affected by the centrifugal force, causing the locking rod 308 to slide away from the holder 309, thereby separating the locking rod 308 from the holder 309.

[0069] In a preferred embodiment: the feeding component 4 includes a storage bin 401, the bottom inner cavity of the storage bin 401 is provided with a limiting slide groove 402, the inner cavities on both sides of the storage bin 401 are provided with movable grooves 403, the inner cavity of the movable groove 403 is provided with a discharge port 404, the inner wall of the movable groove 403 is slidably sleeved with a partition 405, the outer wall of the partition 405 is fixedly equipped with one end of a steel wire 406, the other end of the steel wire 406 is fixedly equipped with a locking rod 407, the locking rod 407 is arranged on the inner wall of the limiting slide groove 402, and the length of the locking rod 407 is half of the length of the limiting slide groove 402.

[0070] In a preferred embodiment: the steel wire 406 is slidably sleeved in the inner cavity of the storage bin 401 , the discharge port 404 is arranged on the side of the movable groove 403 away from the steel wire 406 , and the storage bin 401 and the support assembly 1 are fixedly assembled.

[0071] In the above structure, the feeding assembly 4 and the rotating shaft 104 are fixedly assembled, so that when the supporting assembly 1 drives the feeding assembly 4 to rotate clockwise, the second limiting slide groove 402 is obliquely arranged in the inner cavity of the storage bin 401, so that when the feeding assembly 4 rotates, the second locking rod 407 moves outward by centrifugal force, and then pushes the partition 405 through the steel wire 406, so that the partition 405 seals the discharge port 404, thereby preventing the fish food in the inner cavity of the storage bin 401 from spilling out;

[0072] When the support assembly 1 drives the feeding assembly 4 to rotate counterclockwise, the locking rod 407 moves inward due to centrifugal force, and then drives the partition 405 through the steel wire 406, so that the partition 405 moves to the side of the movable groove 403 away from the discharge port 404, so that the fish food in the inner cavity of the storage bin 401 is scattered through the discharge port 404.

[0073] A method for raising aquatic seedlings comprises the following steps:

[0074] 1) Prepare the seedling raising environment conditions

[0075] 2) Fish egg hatching

[0076] Place the eggs in a cylindrical plastic bucket for incubation, place an air stone in the middle bottom, the water temperature is 26-32℃, and the egg density is 31-1.5 million eggs / m;

[0077] 3) Fry cultivation

[0078] 2-4 days after the fry are hatched, the hatched fish are picked out and placed in cement pools for cultivation according to the opening of the fry's eyes. The cement pools are filled with fresh filtered and sterilized seawater, without fertilizer, and the cultivation density is 18,000-22,000 fish / m;

[0079] 4) Daily management

[0080] The rotating shaft 104 and the rotating disk 306 are fixedly assembled, so that the motor 102 drives the rotating disk 306 to rotate through the rotating shaft 104, and the limiting slide groove 1 307 is tilted so that when the rotating disk 306 rotates clockwise, the locking rod 1 308 located in the inner cavity of the limiting slide groove 1 307 is affected by the centrifugal force, so that the locking rod 1 308 slides to the side of the clamping seat 309, and then the locking rod 1 308 and the clamping seat 309 are clamped, so that the rotating disk 306 drives the umbrella seat 303 to rotate through the locking rod 1 308, and the circular tube 301 is sleeved on the outer edge of the support rod 105, and the push rod 207 is slidably sleeved with the inner wall of the guide groove 206, and the isolation tube 204 and the isolation tube 1 201 are slidably sleeved, so that the push rod 207 passes through the guide groove 206. The isolation tube 204 is driven to move up and down, so that the top outer edge of the isolation tube 204 is in two states of being flush with the water surface and below the water surface, and the water flows into the space between the isolation component 2 and the support component 1 through the top of the isolation tube 204 through the up and down movement of the isolation tube 204. At this time, the threaded leaf 302 is driven to rotate by the circular tube 301, so that the threaded leaf 302 drives the water to spray to the feeding component 4 through the guide groove 305. After the water contacts the bottom of the feeding component 4, it flows into the top of the water changing component 3. With the guidance of the spreading leaf 304, the water is sprayed into the air in an umbrella shape, carrying oxygen into the water pool, so as to increase the dissolved oxygen content in the water, promote the degradation of organic matter in the sewage, and maintain the activity of microorganisms in the water treatment system;

[0081] After the fry opens its eyes, the support assembly 1 drives the turntable 306 to rotate counterclockwise, and the locking rod 308 located in the inner cavity of the limiting slide groove 307 is affected by the centrifugal force, so that the locking rod 308 slides away from the clamping seat 309, thereby separating the locking rod 308 from the clamping seat 309;

[0082] When the support component 1 drives the feeding component 4 to rotate counterclockwise, the locking rod 407 moves inward due to centrifugal force, and then drives the partition 405 through the steel wire 406, so that the partition 405 moves to the side of the movable groove 403 away from the discharge port 404, so that the fish food in the inner cavity of the storage bin 401 is scattered through the discharge port 404 to start feeding the bait.

[0083] In a preferred embodiment: preparing the seedling raising environment conditions specifically includes:

[0084] 1.1) Cement pool

[0085] Several square cement pools with an area of ​​4-16 square meters, with smooth bottom and wall, and a water depth of 50-80 cm. Several irregular cement blocks are placed in each cement pool, and several plastic plates are placed on the water surface, with specifications of 15-30 cm in length and 15-30 cm in width. Each cement pool is equipped with a water changing device;

[0086] 1.2) Seedling environment

[0087] The dissolved oxygen is above 5 mg / L, the pH value is 7.8-8.2, the water specific gravity is 1.020-1.022, the water temperature is 26-32℃, the light intensity is 1000-3000lx, the indoor light is adjustable, and a good ventilation environment is maintained for seedling cultivation.

[0088] In a preferred embodiment: preparing the seedling raising environment conditions also includes:

[0089] 1.3) Cleaning and disinfection of cement pools, cement blocks, plastic plates and other culture tools: clean with oxalic acid, first disinfect with high concentration of chlorine dioxide, rinse with fresh water, then fill with fresh water and disinfect again with water, using 2ppm, finally, drain the water and rinse with fresh water 3 times;

[0090] 1.4) Cultivation of fish bait and feed

[0091] One month before laying eggs, start cultivating Chlorella, Platymonas, and rotifer baits, and place the baits in the inner cavity of the feeding component 4.

[0092] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water exchange device, comprising a support assembly (1), characterized in that: An isolation component (2) is fixedly mounted on the top of the support component (1), a water changing component (3) is fixedly mounted on the top of the support component (1), and a feeding component (4) is fixedly mounted on the top of the water changing component (3); The support assembly (1) comprises a sealing seat (101), a motor (102) is fixedly mounted on the inner wall of the bottom of the sealing seat (101), a connecting seat (103) is fixedly mounted on the power output shaft of the motor (102), a rotating shaft (104) is fixedly mounted on the top of the connecting seat (103), and a supporting rod (105) is fixedly mounted on the top of the sealing seat (101); The rotating shaft (104) is located in the inner cavity of the support rod (105); a bearing is provided on the outer edge of the rotating shaft (104); and the rotating shaft (104) is rotatably connected to the support rod (105) via the bearing; The isolation assembly (2) comprises an isolation tube 1 (201), one end of a fixing rope (202) is fixedly mounted on the bottom outer edge of the isolation tube 1 (201), the other end of the fixing rope (202) is fixedly mounted on a floating ring (203), the top outer edge of the isolation tube 1 (201) is slidably sleeved with an isolation tube 2 (204), the top outer edge of the isolation tube 2 (204) is provided with a wire seat (205), the outer edge of the wire seat (205) is provided with a guide groove (206), the inner wall of the guide groove (206) is slidably sleeved with a push rod (207), and the guide groove (206) is arranged in a wave shape; The wire holder (205) is fixedly assembled via a fixing structure and the second isolation tube (204), and the push rod (207) is fixedly assembled with the bottom of the water changing assembly (3); The water changing assembly (3) comprises a circular tube (301), the inner wall of the circular tube (301) is provided with a threaded leaf (302), the top of the circular tube (301) is fixedly provided with an umbrella seat (303), the top of the umbrella seat (303) is provided with a plurality of leafs (304) in an annular shape, the inner cavity of the umbrella seat (303) is provided with a guide groove (305), the middle inner cavity of the umbrella seat (303) is provided with a rotating disk (306), the outer wall of the rotating disk (306) is provided with a limiting slide groove (307), the inner cavity of the limiting slide groove (307) is slidably sleeved with a locking rod (308), and the inner wall of the umbrella seat (303) close to the rotating disk (306) is provided with a clamping seat (309); A plurality of the clamping seats (309) are annularly provided on the inner wall of the umbrella seat (303); a plurality of the guide grooves (305) are annularly provided in the inner cavity of the umbrella seat (303); and two ends of the guide grooves (305) are located between the two groups of spreading leaves (304); The inner cavity formed by the limiting slide groove 1 (307) and any group of the clamping seats (309) is adapted to the locking rod 1 (308), and the length of the locking rod 1 (308) is half the length of the inner cavity of the limiting slide groove 1 (307); The rotating disk (306) and the rotating shaft (104) are fixedly assembled, the inner cavity of the umbrella seat (303) is inlaid with a bearing, and the umbrella seat (303) is rotatably connected to the rotating shaft (104) through the bearing, and the umbrella seat (303) and the supporting rod (105) are located on the same axis.

2. A water changing device according to claim 1, characterized in that: The feeding assembly (4) comprises a storage bin (401), the bottom inner cavity of the storage bin (401) is provided with a second limiting slide groove (402), the inner cavities on both sides of the storage bin (401) are provided with moving grooves (403), the inner cavity of the moving groove (403) is provided with a discharge outlet (404), the inner wall of the moving groove (403) is slidably sleeved with a partition (405), the outer wall of the partition (405) is fixedly equipped with one end of a steel wire (406), the other end of the steel wire (406) is fixedly equipped with a second locking rod (407), the second locking rod (407) is arranged on the inner wall of the second limiting slide groove (402), and the length of the second locking rod (407) is half the length of the second limiting slide groove (402).

3. A water changing device according to claim 2, characterized in that: The steel wire (406) is slidably sleeved in the inner cavity of the storage bin (401), the discharge port (404) is arranged on a side of the movable groove (403) away from the steel wire (406), and the storage bin (401) and the support assembly (1) are fixedly assembled.

4. A method for raising aquatic seedlings, characterized in that: The aquatic seedling raising method using the water exchange device according to claim 3 comprises the following steps: 1) Prepare the seedling raising environment conditions 2) Fish egg hatching Place the eggs in a cylindrical plastic bucket for incubation, place an air stone in the middle bottom, the water temperature is 26-32℃, and the egg density is 31-1.5 million eggs / m; 3) Fry cultivation 2-4 days after the fry are hatched, the hatched fish are picked out and placed in cement pools for cultivation according to the opening of the fry's eyes. The cement pools are filled with fresh filtered and sterilized seawater, without fertilizer, and the cultivation density is 18,000-22,000 fish / m; 4) Daily management The rotating shaft (104) and the rotating disk (306) are fixedly assembled so that the motor (102) drives the rotating disk (306) to rotate through the rotating shaft (104). The limiting slide groove (307) is tilted so that when the rotating disk (306) rotates clockwise, the locking rod (308) located in the inner cavity of the limiting slide groove (307) is affected by the centrifugal force, causing the locking rod (308) to slide toward the side of the clamping seat (309), thereby The locking rod 1 (308) and the clamping seat (309) are clamped together, so that the rotating disk (306) drives the umbrella seat (303) to rotate through the locking rod 1 (308), and the circular tube (301) is sleeved on the outer edge of the support rod (105), and the push rod (207) and the inner wall of the guide groove (206) are slidably sleeved, and the isolation tube 2 (204) and the isolation tube 1 (201) are slidably sleeved, so that the push rod (207) The guide groove (206) drives the second isolation tube (204) to move up and down, thereby causing the top outer edge of the second isolation tube (204) to circulate in two states: flush with the water surface and below the water surface. The up and down movement of the second isolation tube (204) causes water to flow through the top of the second isolation tube (204) into the space between the isolation component (2) and the support component (1). At this time, the threaded leaf (302) is driven to rotate by the circular tube (301), causing the threaded leaf (302) to drive the water to spray toward the feeding component (4) through the guide groove (305). After the water contacts the bottom of the feeding component (4), it flows into the top of the water exchange component (3). Following the guidance of the spreading leaf (304), the water is sprayed into the air in an umbrella shape, carrying oxygen into the water pool, thereby increasing the dissolved oxygen content in the water, promoting the degradation of organic matter in the sewage, and maintaining the activity of microorganisms in the water treatment system. After the fry opens its eyes, the support assembly (1) drives the turntable (306) to rotate counterclockwise, and the locking rod (308) located in the inner cavity of the limiting slide groove (307) is affected by the centrifugal force, causing the locking rod (308) to slide away from the clamping seat (309), thereby causing the locking rod (308) to separate from the clamping seat (309); When the support assembly (1) drives the feeding assembly (4) to rotate counterclockwise, the second locking rod (407) moves inward due to centrifugal force, and then drives the partition (405) through the steel wire (406), so that the partition (405) moves to the side of the moving groove (403) away from the discharge outlet (404), so that the fish food in the inner cavity of the storage bin (401) is scattered through the discharge outlet (404) to start feeding the bait.

5. A method for raising aquatic seedlings according to claim 4, characterized in that: The preparation of the seedling raising environment conditions specifically includes: 1.1) Cement pool Several square cement pools with an area of ​​4-16 square meters, the bottom and wall of the cement pools are smooth, the water depth is 50-80 cm, several irregular cement blocks are placed in each cement pool, and several plastic plates are placed on the water surface, with specifications of 15-30 cm in length and 15-30 cm in width. Each cement pool is equipped with a water changing device; 1.2) Seedling environment The dissolved oxygen is above 5 mg / L, the pH value is 7.8-8.2, the water specific gravity is 1.020-1.022, the water temperature is 26-32℃, the light intensity is 1000-3000lx, the indoor light is adjustable, and a good ventilation environment is maintained for seedling cultivation.

6. A method for raising aquatic seedlings according to claim 5, characterized in that: The preparation of the seedling raising environment conditions also includes: 1.3) Cleaning and disinfection of cement pools, cement blocks, plastic plates and other culture tools: clean with oxalic acid, first disinfect with high concentration of chlorine dioxide, rinse with fresh water, then fill with fresh water and disinfect again with water, using 2ppm, finally, drain the water and rinse with fresh water 3 times; 1.4) Cultivation of fish bait and feed One month before egg laying, start cultivating Chlorella, Platymonas, and Rotifer bait, and place the bait in the inner cavity of the feeding component (4).

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