CN204707768U - Cycle water fish seedling fostering system - Google Patents

Abstract

The utility model provides a circulating water fish seedling cultivation system, which is characterized in that: the system has a circulating pool, the circulating pool is connected with the water inlet pipe of the biological filter barrel group, and the water inlet pipe of the biological filter barrel group is connected with at least one biological filter There is a pipeline pump between the barrel group, the circulating water tank and the biological filter barrel group, the biological filter barrel group is connected to the ultraviolet sterilizing equipment, the ultraviolet sterilizing equipment is connected to the circulating water inlet pipe, and the circulating water return pipe is connected to the circulating water pool; there are one or more The fish tank for aquatic nursery, the water inlet pipe of each fish tank for aquatic nursery is connected to the circulating water inlet pipe, the outlet pipe connected to the outlet of each fish tank for aquatic nursery is connected to the circulating return pipe; each fish tank for aquatic nursery The water outlet of the aquaculture nursery is connected with a drainage kit group for fish nursery inside the fish tank for fish nursery. The utility model is a circulating water fish seedling cultivation system with high-density seedling cultivation, high output, corrosion resistance, and long-term stable cultivation of fish fry.

Description

Circulating water fish seedling cultivation system

technical field

The utility model relates to the field of a fish fry cultivation system in industrialized circulating water, in particular to a complete set of equipment for cultivating fish fry in circulating water for fish.

Background technique

At present, there are not many circulating water seedling cultivation systems used in the society, and the relatively primitive cement pond seedling cultivation is still used, and the long-flowing water method is used to raise seedlings. Systems that can use circulating water for seedling cultivation are also purchased or imitated foreign complete sets of equipment, but these systems and methods have the following problems, resulting in low seedling production and low seedling survival rate:

1. The problems focus on the design of nursery ponds. The seedling ponds in the existing circulating water seedling raising systems are almost all designed with circular, square or hexagonal pools (this design will occupy about 20% more area than the rectangle), and the ones using this design The most fundamental reason is to discharge sewage at the bottom of the pool. The bottom design of these seedling ponds is mainly based on the shape of the bottom of the pot. The water in the pond is rotated in different ways. The centrifugal force generated by the rotating water in the pond will collect solid impurities such as feces and residual bait to the middle of the pond, so as to achieve the goal of accumulating pollution. purpose, and then discharge the sewage through the sewage discharge design located in the middle of the pool. The disadvantages of this type of design are:

1. The water flow is too small to achieve the purpose of fouling, the water flow is too large will hurt the fry, and too much water flow will also concentrate the weak fry in the middle, resulting in uneven distribution of fish fry in the pool, and the concentrated fish population will also cause fish fry in the pool water. Dissolved oxygen is also uneven, affecting the normal growth of fry. This design is unreasonable and also wastes the space in the nursery pond. Moreover, the dirt concentrated in the middle is mixed with the weak fry, which will cause the gills of the fry to be blocked by the dirt, and the fry will also die due to bacterial infection caused by the dirt around them, which directly affects the production of seedlings. .

2. When the dirt is close to the middle of the pool, because the solid dirt loses its original linear velocity, it falls to the bottom of the pool and cannot move forward. Bad, high content of disease bacteria.

3. Some systems are designed with auxiliary sewage devices at the sewage outlets. For example, the inverted butterfly-shaped sewage suction device imitating the Norwegian circulating aquaculture system, although the sewage discharge effect has been improved, but the weak fry are easily sucked into the sewage pipe and die; some designs use a filter screen at the sewage outlet This design makes it easy for small fry to be adsorbed to the filter and cannot escape and die, and the filter at the bottom of the pool is easy to clog, and if it is not cleaned in time, it will affect the operation of the entire circulating water system.

Second, the problem arises in the circulating water treatment process. The basic process of the circulating water treatment process on the market is as follows: sewage in the breeding pond → solid-liquid separation → biological decomposition → protein separation → sterilization → adding oxygen → returning to the breeding pond. However, the disadvantages of this type of equipment are:

1. Many equipments work together to work together, the probability of problems is relatively high, and the cost of the whole set of equipment is also high, which is not conducive to seedling production.

2. When ozone is used for sterilization, the residual ozone and by-products make the young fry very easy to poison and die, which leads to a low survival rate of fry during the breeding process.

3. Although the whole process separates the protein from the water in the nursery pond, due to the lack of corresponding equipment in the nursery pond, many foams in the pond cannot be discharged in time due to water flow or aeration. These foams (mainly oil, protein and fine organic debris) will It becomes a hotbed for bacterial reproduction, and it will also pollute the water quality, directly affecting the survival rate and healthy growth of young fry in the pond.

4. The oxygenation step is basically achieved by aerating and adding pure oxygen, but due to the lack of degassing steps in the process, the carbon dioxide breathed out by the fry cannot be discharged from the water in time, and the high concentration of carbon dioxide will make the oxygen insoluble. Into the water, resulting in insufficient dissolved oxygen in the water. Oxygen is added in the form of aeration, and the dissolved oxygen in the inflated water will damage the weak fry, and the nature of the countercurrent of the fry will cause the inflated part of the fry to be too concentrated in the pool, and the fry in the pool will be unevenly distributed. Dissolving pure oxygen into water by pressurization will cause part of the pure oxygen to be reduced to a gas state again in the water and in the fish fry, causing the fish fry to suffer from gas bubble disease and die.

Third, the operation in the process of raising seedlings. Regardless of whether it is traditional cement pond seedlings or seedling ponds using circulating water, the operation of pouring ponds or harvesting seedlings (when fish fry are taken out of the nursery pond) in the seedling raising process still adopts the method of manual seedling removal, and there is no special method for this operation. Do any design. Because this operation is very frequent in the nursery process, not only wasted a lot of manpower, also can have a lot of fry to die because of the mechanical damage that this operation is subjected to.

Utility model content

The utility model provides a circulating water fish seedling cultivation system, the purpose of which is to solve the low fry survival rate, low output, large land occupation, unstable water treatment system, high energy To solve problems such as large water volume, difficult maintenance, and easy rust damage, a circulating water fish seedling cultivation system with high density, high survival rate, high output, corrosion resistance, and long-term stable use in fish seedling production is provided.

The technical scheme of the utility model is:

A circulating water fish seedling cultivation system is characterized in that: the system has a circulating water pool, the circulating water pool is connected to the water inlet pipe of the biological filter barrel group, the water inlet pipe of the biological filter barrel group is connected to at least one biological filter barrel group, and the circulating water pool There is a pipeline pump between the biological filter tank group, the biological filter tank group is connected to the ultraviolet sterilizing equipment, the ultraviolet sterilizing equipment is connected to the circulating water inlet pipe, and the circulating water return pipe is connected to the circulating pool; there are one or more aquatic breeding fish The water inlet pipe of each fish tank for aquaculture nursery is connected with the circulating water inlet pipe, and the outlet pipe connected with the outlet of each fish tank for aquaculture nursery is connected with the circulation return pipe; the water outlet of each fish tank for aquaculture nursery is in the The inside of the fish tank for raising seedlings is connected with a drainage kit group for raising fish seedlings.

The water inlet pipe of the biological filter tank group is connected to two biological filter tank groups, and each biological filter tank group is connected with the same number of ultraviolet sterilization equipment, circulating water inlet pipe, circulating water return pipe, fish tank for aquatic nursery, two biological filter tanks The bucket group and its respectively connected ultraviolet sterilizing equipment, circulating water inlet pipe, circulating water return pipe and fish tank for aquatic seedlings are arranged symmetrically with respect to the circulating water pool.

The circulating water fish seedling cultivation system is composed of two circulating waterways connected in parallel on the circulating pool and symmetrically arranged; each circulating waterway starts from the circulating pool according to the direction of water flow: the part of the circulating pool near the bottom of the pool There are several outlets of circulating pools; each outlet of circulating pools is connected with a pipeline pump; one side of the outlets of all pipeline pumps is connected in parallel in the middle of the water inlet pipe of the biological filter bucket group; the two ends of the water inlet pipe of the biological filter bucket group They are respectively connected to the respective water inlets of the two sets of biological filter barrels; the outlets of the biological filter barrels are connected to the outlet pipes of the biological filter barrels; the other side of the outlet pipes of the biological filter barrels are connected to the closed On the main water inlet pipe of the easy-maintenance ultraviolet sterilizer; the main outlet pipe of the closed-type easy-maintenance ultraviolet sterilizer for water treatment is connected with a circulating water inlet; between the circulating water inlet pipe and the circulating return pipe, there are several aquatic nursery fish tank; the water inlet of the fish tank for aquatic nursery is located directly above the fish tank and connected to the circulating water inlet pipe; the outlet of the fish tank for aquatic nursery is connected to the circulating return pipe through the outlet pipe of the fish tank for aquatic nursery; One side inside the fish tank with the water outlet of the fish tank is connected with a drainage kit group for raising fish seedlings; the circulation return pipe is connected with the water inlet of the circulation pool.

Therefore, each circulating waterway of the utility model starts from the circulating pool and is arranged in order according to the direction of water flow: circulating pool→several pipeline pumps→biological filter bucket group→closed and easy-to-maintain ultraviolet sterilizing equipment for water treatment→circulating water inlet pipe→parallel connection A number of fish tanks for aquaculture nursery→circulation return pipe→circulation pool. Among them, the water inlet pipe of the fish tank for aquatic nursery is connected to the circulating water inlet pipe; the water outlet of the fish tank for aquatic nursery is connected to the circulating return pipe through the outlet pipe of the fish tank for aquatic nursery; the water outlet of each fish tank for aquatic nursery is One side of the inside of the fish tank is equipped with a set of drainage kits for fish nursery.

The structure of the biological filter barrel group is:

It consists of a filter barrel and b filter barrel in series;

Both the filter bucket a and the filter bucket b are filled with corrugated sheet-like biological fillers arranged in a vertical direction;

The tops of a filter barrel and b filter barrel are connected through a water tank;

Both a filter barrel and b filter barrel are open at the top of the barrel, the bottom of the barrel is funnel-shaped, and there are multiple supporting legs at the bottom of the barrel;

The lowest part of the funnel-shaped bottom of the filter barrel a is provided with a main water inlet; the lowest part of the funnel-shaped bottom of the filter barrel b is provided with a main water outlet;

Both filter barrel a and filter barrel b are: a recoil air frame is provided under the bottom layer of sheet-like biological filler, and the recoil air frame is composed of a hollow pipe body, and small holes are arranged on the pipe wall. The air flushing frame is welded by hollow stainless steel square tubes, and the interior of the stainless steel square tubes is completely connected. The walls of the stainless steel square tubes are provided with evenly distributed small holes for inflating; Air flushing pipe; the recoil air pipe passes through the bottom of the funnel-shaped bucket and extends to the outside of the bucket; the uppermost layer of sheet-shaped biological filler in the filter bucket is fixedly provided with a top fixing frame.

A perforated sieve plate with evenly distributed leaking holes is arranged above the top fixing frame of the b filter barrel; an air-filled pipe and an overflow pipe are arranged below the barrel wall in the vertical direction of the b filter barrel; the air-filled pipe The water level is higher than the overflow pipe.

A blower is connected to the air-filling pipe of the biofilter bucket through the blower air pipe.

a The biological filler in the filter tank is completely submerged in water, and the surface of the biological filler is provided with a microbial film.

b The biological filler in the filter barrel is completely placed in the air, and the surface of the biological filler has biological groups.

The structure of described ultraviolet sterilizing equipment is:

It includes the main water inlet pipe and the main water outlet pipe, and has several sterilization units arranged side by side. Each sterilization unit includes a pipe body, the water inlet of the pipe body is connected with the main water inlet pipe, the water outlet of the pipe body is connected with the main water outlet pipe, Several ultraviolet light tubes are arranged in the body.

The water inlet of the pipe body is located on the side wall of the pipe body, and a double union ball valve is connected between the water inlet of the pipe body and the main water inlet pipe; the water outlet of the pipe body is located on the side wall of the pipe body, and the water outlet of the pipe body is connected to the main water outlet There are double live ball valves connected between the water pipes; one end of the pipe body is closed, and the other end is provided with a germicidal lamp group. The germicidal lamp group includes fasteners. The threads are screwed together and fastened at the end of the pipe body. The top seal is fixed in the fastener. The several interfaces set by the top seal are fixed with a quartz sleeve inserted into the pipe body. The quartz sleeve is fixed with a UV lamps.

One end of the quartz sleeve is closed, and the other end is provided with an outlet sealing rubber ring, and the power supply line of the ultraviolet lamp tube located in the quartz sleeve passes through the through hole provided by the outlet sealing rubber ring.

The sum of the water cross-sectional areas in all the pipe bodies is greater than the water cross-sectional area of the main water inlet pipe. That is to say, the cross-sectional area of the pipe body minus the cross-sectional area of the quartz sleeve is the water cross-sectional area of the pipe body, and the sum of the water cross-sectional areas of all pipe bodies is greater than the water cross-sectional area of the main water inlet pipe.

The structure of the fish tank for raising aquatic seedlings is:

The cross section of the fish tank is rectangular, the top of the fish tank is open; the bottom of the fish tank is arc-shaped.

The bottom of the fish tank is inclined downward from one end to the other end, the inclination angle is 10°-30°, and the inclination angle is the angle between the lowest line of the bottom of the fish tank and the horizontal plane.

The lower end of the bottom of the fish tank is provided with a downwardly recessed sewage accumulation area; there is a water outlet in the sewage accumulation area, and the end of the water outlet in the fish tank is connected to the drainage kit, and the end outside the fish tank is connected to the circulation Return pipe in aquatic fish nursery system.

The tops of the four side walls of the fish tank are turned outward to form a U-shaped groove edge; the U-shaped groove is provided with a support frame inside, and several support legs are arranged under the support frame.

The bottom of the vertical section of the fish tank is arc-shaped, and the two sides extend from the outside to the inside.

The structure of the drainage set for fish nursery is as follows:

A drainage kit set for fish seedlings, including a collection box, characterized in that: the collection box is an open box body; the bottom of the collection box is provided with two through holes as water inlet and water outlet respectively; The water inlet described above is inserted with a suction pipe; the end of the water outlet located inside the collection box is connected with a filter screen, and the end of the water outlet located outside the collection box is connected with a sewage pipe; the lower end of the suction pipe is located in the pool of the nursery pond Above the bottom, the lower end of the sewage pipe is located below the bottom of the nursery pond.

The filter screen is in the shape of a tube, the upper end of the filter screen is closed, and the lower end is fixed on the water outlet of the collection box; a cleaning brush with a rotating shaft is arranged inside the filter screen; the bristles of the cleaning brush are in contact with the filter screen; A motor is fixed on the collecting box, and the above-mentioned rotating shaft is the output shaft of the motor. The motor drives the cleaning brush to rotate through the rotating shaft to realize the function of cleaning the filter screen.

The pipe wall of the sewage pipe is provided with a seedling collection port; the pipe wall of the sewage pipe is provided with two vertical slideway guide rails on both sides of the described seedling collection port; the two slideways A seedling harvesting ram that can slide up and down is arranged between the guide rails; a ram pull bar is connected to the seedling collecting ram. The seedling harvesting ram plays the role of closing or opening the seedling harvesting opening.

There is an external threaded nozzle at the end of the sewage pipe, the external threaded nozzle is connected with an internal threaded flange, the external threaded nozzle passes through the bottom of the nursery pond, and the internal threaded flange is screwed on the external threaded nozzle to fix the sewage pipe on the On the bottom of the nursery pond; the end of the external thread pipe mouth is connected with a tee, one end of the tee is connected to the circulating water interface through a valve, and the other end is connected to the fish fry collection port through a valve.

One end of the water outlet located outside the collection box is fixedly connected with a socket adjusting part, and the sewage pipe is slidably inserted on the socket adjusting part.

The upper end of the gate pull rod passes through a pull rod fixing piece with a hole in the middle.

Compared with the prior art, the utility model has the following beneficial effects:

1. This utility model is a rare circulating water system specially designed for fish seedling cultivation in China. It is combined with the use of fish tanks for aquatic seedling breeding and drainage kits for fish seedlings, which greatly improves the fish fry breeding process. The live rate and seedling output can improve high-quality fry for the seedling market.

2. The equipment of the utility model is arranged reasonably, which makes reasonable use of the space and saves the floor area of the building. The whole system adopts a modular design completely above the ground, which is easy to install, easy to disassemble, and can be assembled repeatedly. More than 95% of the system material is made of glass fiber reinforced plastic and PVC, which is anti-aging and has a long service life.

3. The utility model utilizes the advanced circulating water treatment concept to achieve an ideal water treatment effect and provide water with stable water quality for seedling production, so that the whole system has high fry survival rate, stable seedling output, large output, and Characterized by uninterrupted production throughout the year. It has been realized in actual production: the survival rate of eel breeding is as high as 95%, and the annual output of 450,000 standard eel fry (10 grams/only); the survival rate of sturgeon breeding is as high as 80%, and the annual output of 600,000 sturgeon fry (body length 10 cm) excellent breeding results.

4. The biological filter barrel set of the present utility model adopts fixed sheet-like biological filler, double-barrel design, and has the effects of submerged biological filtration and trickling biological filtration. At the same time, due to the unique design inside the biological filter barrel, it can It has the functions of solid-liquid separation, protein separation and adding oxygen to water, so that the utility model omits the solid-liquid separator, protein separator and pure oxygen dissolving water equipment compared with the traditional aquaculture circulating water treatment process. It not only saves the cost of equipment and the resulting energy consumption, but also effectively reduces the probability of equipment failure and increases the safety of breeding production.

5. The ultraviolet sterilizing equipment of the utility model adopts a completely detachable design, any part of which is damaged can be disconnected from the circulating water system for maintenance in time, without affecting the operation of the equipment and the sterilizing effect. All accessories are national standard products, easy to buy and easy to replace. The thickness of the water film flowing through the lamp tube is designed to be thinner, and the bactericidal effect is ideal even when the water transparency is not high, and it is more suitable for use in circulating aquaculture systems.

6. Compared with the traditional circular or hexagonal aquaculture pond, the utility model's rectangular fish tank for aquaculture can save 20% of the facility area. The bottom of the fish tank is arc-shaped and slopes downward from one end to the other. The arc-shaped bottom of the tank makes it easy for the super fine residual bait and fine feces and other solid dirt fed during the seedling raising process to be easily concentrated at the lowest point of the arc-shaped tank bottom, and is not easy to be stirred up; from one end to the other end to The downward sloping bottom of the tank makes the dirt deposited on the bottom of the tank easily brought to the sewage accumulation area, and is discharged from the fish tank from the water outlet at the lowest point of the sewage accumulation area. The fish tank with such a self-cleaning design can reduce the time that dirt stays in the fish tank and ensure fresh water quality, which in turn reduces the burden on water treatment equipment, saves energy, and increases the survival rate of fish nursery.

The fish tank can take in water from one end of the water inlet pipe and let the water out from the other end. This design ensures that the water flow in the fish tank is constant as a whole. By adjusting the water inlet speed, not only can the water flow in the tank not be too fast, so that the fry are evenly distributed, but also the continuous inflow of new water can ensure that the water in the fish tank is in high solubility. Oxygen makes it possible to achieve high-density seedling cultivation.

The preferred main material for the fish tank is FRP, which is easy to make, durable, long-lasting, and stable in chemical properties. Its many advantages not only reduce maintenance costs, but also provide a guarantee for the smooth production of seedlings. It suspends the fish tank above the ground through its own support frame. This design enables the position of the fish tank to be adjusted according to the design of the circulating water system, and it is easier to assemble and disassemble, convenient to transport, and lower in cost.

The bottom of the fish tank is arc-shaped, which has the advantage that it makes it easy to concentrate the solid dirt such as extremely small residual bait and fine feces during the seedling raising process at the lowest point of the arc-shaped bottom of the tank, and is not easy to be stirred Get up; the bottom of the tank that slopes downward from one end to the other makes the dirt deposited on the bottom of the tank easily brought to the sewage accumulation area, and is discharged from the fish tank from the water outlet at the lowest point of the sewage accumulation area. The fish tank with such a self-cleaning design can reduce the time that dirt stays in the fish tank and ensure fresh water quality, which in turn reduces the burden on water treatment equipment, saves energy, and increases the survival rate of fish nursery.

7. The unique design of the drainage set for fish nursery of the present invention can continuously suck the dirt from the bottom of the nursery tank (pool) into the collection box by utilizing the water level difference, without the assistance of other equipment at all. It has the advantages of small equipment size, remarkable sewage discharge effect, low equipment cost and operation cost, and easy installation and maintenance. At the same time, grease, foam and other dirt floating on the water surface overflow into the collection box through the upper end of the collection box wall and are discharged out of the tank (pool), so that it can also have the water body at the same time under the original bottom cleaning effect. Surface cleaning function.

The drainage kit for fish nursery also adopts a cylindrical filter design with automatic cleaning function, which not only prevents fry from escaping from the nursery tank (pool) and allows dirt to pass through, but also prevents the Unsmooth drainage caused by blockage.

When the drainage kit set for fish nursery realizes the sewage suction at the bottom of the tank (pool), it can also suck the fish fry that are not in good condition (sick or dead) into the collection box, which is beneficial to observe the cultivated objects and detect diseases in time Precursors ensure the safe and smooth progress of seedling production.

The drainage kit set for fish nursery is designed with a seedling collection port. When it is time to harvest fry or pour the pond, open the gate of the seedling collection port and empty the nursery tank (pool), and all the fry will be drained from the nursery tank (pool) at one time. Collect them. This design can not only improve the work efficiency in the seedling raising process, but also reduce the disturbance and damage to the fry, so that the harvesting and pouring of the seedlings can be realized conveniently and quickly. .

To sum up, the utility model solves the problems of the prior art, not only ensures the stability of the water quality of the culture, the stable output of the whole set of equipment for seedling cultivation, but also the reasonable structural design saves the occupied space; the glass fiber reinforced plastic is used as the main body of the system The material increases the service life of the equipment; the reasonable water circulation process saves energy consumption; the unique biological filtration design makes it have the functions of solid-liquid separation and protein separation, which saves equipment costs and increases the safety of seedling production.

The utility model has the characteristics of uninterrupted production throughout the year, using circulating water for seedling cultivation, daily water change of less than or equal to 5%, high output, stable income, small land occupation, low energy consumption, stable water quality, easy installation, and easy maintenance.

Description of drawings

Fig. 1-1 is one of isometric views of the utility model;

Fig. 1-2 is the top view of the utility model

Fig. 1-3 is the side view of the utility model;

Fig. 2-1 is the second isometric view of the utility model;

Fig. 3-1 is the isometric perspective view of the biological filter barrel group of the present invention;

Fig. 3-21 is the schematic diagram of each layer of biological filler layer in the filter tank of the present utility model;

Figure 3-22 is a schematic diagram of a piece of corrugated sheet-like biological filler;

Fig. 3-3 is the side view of the biological filter bucket group of the present utility model;

Fig. 3-4 is the isometric view of the biological filter barrel group of the present utility model;

Figure 4-1 is a schematic diagram of the connection between the utility model fish tank and the circulating water inlet pipe and the circulating water return pipe;

Figure 4-2 is a schematic cross-sectional view of Figure 4-1;

Fig. 5-1 is the isometric view of the utility model ultraviolet sterilizing equipment;

Fig. 5-2 is the front view of the ultraviolet sterilizing equipment of the present utility model;

Fig. 5-3 is a schematic diagram of the structure of the sterilization unit of the ultraviolet sterilization equipment of the present invention;

Figure 5-4 is a cross-sectional view of Figure 5-3;

Figure 5-5 is an enlarged view of part X of Figure 5-4;

Figure 5-6 is an exploded view of Figure 5-3;

Fig. 5-7 is the schematic diagram of the sterilizing lamp group of the ultraviolet ray sterilizing equipment of the present invention;

Figure 6-1 is a schematic diagram of the connection of the utility model circulating pool;

Fig. 7-1 is the isometric view of the fish tank for raising fish seedlings of the utility model;

Fig. 7-2 is the schematic diagram of the fish tank of the utility model after removing part of the fish tank tank wall;

Fig. 7-3 is the side view of the fish tank for raising fish seedlings of the utility model;

Fig. 7-4 is the top view of the fish tank for raising fish seedlings of the utility model;

Fig. 7-5 is the bottom view of the fish tank of the utility model for raising fish seedlings;

Figure 7-6 is a schematic diagram of the U-shaped groove edge, bracket frame, and bracket legs of the fish tank for aquatic nursery of the utility model;

Fig. 8-1 is one of the isometric views of the drainage kit set for raising fish seedlings of the present invention;

Fig. 8-2 is the second isometric view of the drainage kit set for fish nursery of the present invention;

Fig. 8-3 is a side sectional view of the drainage kit set for raising fish seedlings of the present invention;

Fig. 8-4 is an isometric view partially cut away of the filter screen of the drainage kit set for fish nursery of the present invention.

In the picture,

It belongs to the circulating water fish seedling cultivation system: 1: pipeline pump, 2: water inlet pipe of biological filter tank group, 3: biological filter tank group, 4: outlet pipe of biological filter tank group, 5: ultraviolet sterilization equipment, 6: Circulating water inlet pipe, 7: Inlet pipe of fish tank for aquatic nursery, 8: Fish tank for aquatic nursery, 9: Drainage kit set for fish nursery, 10: Outlet pipe of fish tank for aquatic nursery, 11: Circulating return pipe, 12: Circulating pool, 13: Blower trachea, 14: Blower, 15: Circulating pool water inlet, 16: Circulating pool outlet;

Belongs to the biological filter barrel group: 301a: filter barrel, 302b: filter barrel, 303: recoil air pipe, 304: recoil air frame, 305: water inlet, 306: water outlet, 307: top fixing frame, 308: screen with holes Plate, 309: flume, 310: biological filler layer, 311: inflatable pipe, 312: overflow pipe; 3100: corrugated sheet biological filler;

It belongs to ultraviolet sterilization equipment: 5a: sterilization unit, 5b: main water inlet pipe, 5c: pipe plug, 5d: main water outlet pipe, 5e: water inlet flange, 5f: water outlet flange, 501: sealing rubber ring, 502: double Live ball valve, 503: end pipe plug, 504: tee, 505: semi-transparent pipe, 506: external thread joint, 507: internal thread fastener, 508: top seal, 509: outlet sealing rubber ring, 510: power cord, 511: O-ring, 512: ultraviolet lamp, 513: quartz sleeve, 514: end positioning piece, 515: pipe connecting pipe;

It belongs to the fish tank for aquatic nursery: 801: fish tank, 802: U-shaped tank edge, 803: support frame, 804: sewage accumulation area, 805: water outlet, 806: arc-shaped tank bottom, 807: support leg

It belongs to the drainage kit group for fish nursery: 901: collection box, 902: filter screen, 903: water inlet, 904: sewage pipe, 905: bottom suction pipe, 906: seedling ram, 907: slide rail, 908: Seedling receiving mouth, 909: internal thread flange, 910: ram pull rod, 911: pull rod positioning part, 912: socket adjustment part, 913: fixing part, 914: fixing rod, 915: rotating shaft, 916: motor 917: Adjusting rod, 918: external thread nozzle, 919: water outlet, 920: cleaning brush, 921: valve a, 922: valve b, 923, circulating water interface, 924: fry collection port, 925: water level line indication, 926: Schematic representation of the bottom plate of the fish tank

Detailed ways

Below in conjunction with accompanying drawing embodiment, the utility model is further described. The following examples will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present utility model. These all belong to the protection domain of the present utility model.

As shown in Fig. 1-1, Fig. 1-2, Fig. 1-3 and Fig. 2-1, the system for cultivating fish seedlings in circulating water, the specific implementation of the system is explained in the main direction of water flow as follows: 12 li of circulating water pools The water enters the connected pipeline pumps 1 through the water outlets 16 of several circulating pools near the bottom of the pool; several pipeline pumps 1 drive the water into the water inlet pipe 2 of the biological filter group (as shown in Figure 6-1) The two ends of the water inlet pipe 2 of the biological filter barrel group are respectively connected with a set of biological filter barrel group 3; the water passing through the biological filter barrel group 3 uses the principle of water level difference to flow into the ultraviolet sterilized through the outlet pipe 4 of the biological filter barrel group 3 In the equipment 5; the water sterilized by the ultraviolet ray sterilization equipment 5 is respectively supplied to each fish tank 8 for aquatic seedlings through the circulating water inlet pipe 6; Each fish tank 8 is connected to the circulating water inlet pipe 6 by the water inlet pipe 7 of the fish tank for fish breeding, and is connected to the circulating return pipe 11 by the outlet pipe 10 of the drainage kit group for fish breeding; The water outlet of fish tank 8 for aquaculture nursery is all equipped with drainage kit group 9 for fish nursery near the side in the tank; The air blower 14 is connected to the inflation pipe 311 of the biological filter barrel group 3 through the U-shaped blower air pipe 13 . The above water flow process goes round and round, reaching the purpose of circulating water treatment to cultivate fish seedlings.

The structure of biological filter barrel group 3 of the present utility model is as follows:

As shown in Figure 3-1, Figure 3-21, Figure 3-22, Figure 3-3, and Figure 3-4, the double-barrel series biological filter tank group is composed of a filter tank 301 and b filter tank 302 in series Composition in form: a filter barrel 301 and b filter barrel 302 are filled with the circular biological filler layer 310 in the same way, that is, the corrugated sheet-like biological filler 3100 as shown in Figure 3-22 is arranged in a vertical direction to form After the block is cut into a circle with the same inner diameter as the filter barrel as shown in Figure 3-21 to form a biological filler layer 310, and the filter barrel is filled layer by layer; a filter barrel 301 and b filter barrel 302 are adjacent to the display, and The tops of the two barrels are connected by a water tank 309; the barrel of the filter barrel is cylindrical, the top mouth of the barrel is open, and the bottom of the barrel is funnel-shaped; The bottom of the barrel 302 is provided with a main water outlet 306 at the bottom of the funnel; the bottom of the barrel is provided with a plurality of supporting legs; the bottom of the filter barrel is provided with a recoil air frame 304 for supporting the filler; The recoil air frame 304 is welded by hollow stainless steel square tubes, the interior of the stainless steel square tubes is completely connected, and the walls of the stainless steel square tubes are provided with uniformly distributed small holes for inflation; the recoil air frame 304 is provided with a The recoil air pipe 303 for inflation, the recoil air pipe 303 passes through the bottom of the funnel-shaped barrel and extends to the outside of the barrel; the top of the sheet-shaped biological filler 310 in the filter barrel is provided with a top fixing frame 307 to prevent the biological filler from floating , the four corners of the fixing frame are fixed on the wall of the filter barrel; the top fixing frame 307 of the b filter barrel 302 is provided with a perforated sieve plate 308 evenly distributed leaking holes; Inflatable pipe 311 and overflow pipe 312, the horizontal height of inflatable pipe 311 is slightly higher than overflow pipe 312.

Ultraviolet sterilizing equipment 5 structures of the present utility model are as follows:

As shown in Figure 5-1 and Figure 5-2, this ultraviolet sterilizing equipment includes a main water inlet flange 5e, a main water inlet pipe 5b is connected to the water inlet flange 5e, and a pipe is arranged at the other end of the main water inlet pipe 5b. Plug 5c, the main water inlet pipe 5b is connected to the main water outlet pipe 5d through several parallel sterilizing units 5a, and the two ends of the main water outlet pipe 5d are respectively provided with a pipe plug 5c and a water outlet flange 5f.

As shown in Figure 5-2, Figure 5-3, Figure 5-4, Figure 5-5, and Figure 5-6, the water inlet and outlet of the sterilization unit 5a are respectively connected to the main water inlet pipe 5b and the main outlet through the sealing rubber ring 501. On the pipe wall of the water pipe 5d; the other side of the sealing rubber ring 501 is connected to the double union ball valve 502 through the pipe fitting connecting pipe 515; the other side of the double union ball valve 502 is connected to the side port of the tee 504 through the pipe fitting connecting pipe 515 A semi-transparent tube 505 is arranged between the two three-way 504 vertical ports; the other end of the vertical direction interface of the three-way 504 in the water outlet direction is connected with a terminal pipe plug 503; the inside of the three-way 504 in the water outlet direction is inlaid with The end positioning part 514 that prevents the vibration of the quartz sleeve 513; the other end of the vertical interface of the tee 504 in the water outlet direction is connected with an external threaded interface 506; the outlet of the external threaded interface 506 is equipped with a top seal 508, and through The internal thread fastener 507 fixes the top seal 508 on the top of the external thread interface 506 ; the O-ring 511 achieves a sealing effect between the external thread interface 506 and the top seal 508 .

As shown in Figure 5-7, the upper part of the germicidal lamp group is a top seal 508; there are four tubular interfaces on the top seal 508, one end of which is connected to a single-ended open quartz sleeve 513, and the other end is installed There is an outlet sealing rubber ring 509 with a small hole in the middle; an ultraviolet lamp 512 is installed in the quartz sleeve 513; the power supply line 510 of the ultraviolet lamp 512 passes through the small hole in the middle of the outlet sealing rubber ring 509 extends beyond the body of the device. The maximum distance between the tube walls of the quartz sleeve 513 provided on the top seal 508 is less than or equal to the ultraviolet rays penetrating the sterilization distance in water, and the effective cross-sectional area of the water in the pipelines of all the sterilization units 5a (that is, the area of the semi-transparent tube 505 The sum of the cross-sectional area minus the cross-sectional area of the quartz sleeve 513 therein) is greater than the cross-sectional area of the main water inlet pipe 5b.

The structure of the fish tank 8 for aquatic seedling cultivation of the present utility model is as follows:

As shown in Fig. 7-1, Fig. 7-2, Fig. 7-3, Fig. 7-4, Fig. 7-5, the fish tank 8 for aquaculture nursery comprises a fish tank 801, and the cross section of the fish tank 801 is uniform. It is rectangular, and the top of the fish tank 801 is open; the arc-shaped bottom 806 of the fish tank 801 is a downwardly concave arc; the area of the opening at the top of the fish tank 801 is slightly Greater than the area of the bottom of the tank, that is, the vertical section of the fish tank 801 is a trapezoidal structure with the short sides below being arc-shaped and the two sides extending from the outside to the inside; the tops of the four side walls of the fish tank 801 are turned outward to form U-shaped groove edge 802; as shown in Figure 7-6, there is a bracket frame 803 inside the U-shaped groove edge 802 to support the groove body, and several bracket legs 807 are arranged under the bracket frame 803; the arc-shaped The bottom of the tank 806 is inclined downward from one end of the short side to the opposite side, and maintains a certain angle. The angle of inclination is the angle between the lowest line of the bottom of the tank of the fish tank 801 and the horizontal plane, and the angle of inclination is 10°-30°; The end of the downwardly inclined arc-shaped groove bottom 806 is provided with a downwardly recessed dirt accumulation area 804; the lowest point in the middle of the dirt accumulation area 804 is provided with a water outlet 805, and one end of the water outlet 805 located in the fish tank can be connected to Fish nursery is with drainage kit group 9 (as Fig. 4-2), is positioned at one end outside the fish tank and is connected to the return pipe (as Fig. 4-2) in the circulating water fish seedling cultivation system; Described water outlet 5 It has the purpose of draining water, sewage and emptying the fish tank 1 concurrently.

Fish nursery of the present utility model is as follows with the structure of drainage kit group 9:

As shown in Fig. 8-1, Fig. 8-2, Fig. 8-3 and Fig. 8-4, the drainage kit set for fish nursery includes a collection box 901, which is characterized in that: the collection box 901 is an open circle Box shape; at the bottom of the collection box 901 there are two circular holes, one large and one small, the small circular hole is the water inlet 903 of the collection box 901, and the large circular hole is the water outlet 919 of the collection box 901; The water outlet 903 is inserted with a bottom suction pipe 905, and the depth of the bottom suction pipe 905 inserted into the water inlet 903 can be adjusted through an adjustment rod 917; a filter screen 902 is arranged at the end of the water outlet 919 located inside the collection box 901, which is located in the collection box 901 A socket adjustment member 912 is provided at the outer end.

As shown in Figure 8-1, Figure 8-2, Figure 8-3 and Figure 8-4, the filter screen 902 is in the shape of a round tube, one end of the round tube filter screen 902 is sealed, and the other end is fixed on the collection box 901 on the water outlet 919; the inside of the filter screen 902 is provided with a cleaning brush 920 with a rotating shaft 915; the bristles of the cleaning brush 920 are in close contact with the filter screen 902; the upper end of the rotating shaft 915 is set There is a motor 916, and the motor 916 drives the cleaning brush 920 to rotate through the rotating shaft 915 so as to realize the function of cleaning the filter screen 902; the bottom of the collection box 901 is provided with an outwardly protruding fixing piece 913; the fixing piece The protruding part of 913 is connected with a fixed rod 914; the fixed rod 914 plays the role of fixing the motor 916.

As shown in Fig. 8-1, Fig. 8-2 and Fig. 8-3, a sewage discharge pipe 904 is inserted under the socket adjustment member 912, and the end of the sewage discharge pipe 904 is provided with an external thread nozzle 918; the sewage discharge The pipe 904 is provided with a square seedling collecting opening 908 on the pipe wall near the end of the externally threaded nozzle 918; the vertical sides of the seedling collecting port 908 are respectively provided with a slideway guide rail 907, and the slideway guide rail 907 is fixed On the pipe wall of the sewage pipe 904; a seedling collecting gate 906 that can slide up and down is arranged between the two slideway guide rails 907, and the seedling collecting gate 906 plays the role of closing or opening the seedling collecting port 908; the described A gate rod 910 is connected to the seedling harvesting gate 906, and the gate rod 910 can drive the seedling harvesting gate 906 to slide up and down along the slideway guide rail 907; the upper end of the gate rod 910 passes through a pull rod with a hole in the middle Fixing piece 911.

As shown in Figure 8-1, Figure 8-2 and Figure 8-3, the externally threaded nozzle 918 is connected with an internally threaded flange 909, by tightening the internally threaded flange 909 the entire drainage set can be fixed On the bottom plate 926 of the fish tank; the end of the external thread nozzle 918 is connected with a tee, one end of the tee is connected to the circulating water interface 923 through the valve a921, and the other end is connected to the fry collection port 924 through the valve b922 .

As shown in Figure 8-3, when the drainage kit group for fish breeding is working, the water level of the fish tank for aquatic breeding is controlled at the water level line indication 925 at the top of the collection box 901 box wall.

The working principle of the utility model is as follows:

During work, the water in the circulating pool 12 is extracted from the water outlet 16 of the circulating pool through the pipeline pump 1, and is injected into the water inlet pipe 2 of the biological filter barrel group, and then the water enters into the a filter barrel 301 through the water inlet 305; The cross-sectional area of the water inlet 305 is far smaller than the cross-sectional area of the filter bucket a 301, so the water will slowly pass through the sheet-shaped biological filler 310 in the bucket layer by layer, and then overflow into the top of the filter bucket b 302 through the water tank 309 The perforated sieve plate 308; the water that overflows into the perforated sieve plate 308 passes through the small holes on the sieve plate, sprinkles on the sheet-like biological filler 310, and finally reaches the funnel-shaped bottom of the b filter bucket 302; when the water is filtered at b The funnel-shaped bottom of the barrel 302 gradually accumulates, and the water level is gradually higher than that of the water inlet pipe 7 of the fish tank 8 for aquaculture seedlings. Due to the water level difference, the water will pass through the outlet pipe 4 of the biological filter barrel group, the ultraviolet ray sterilization equipment 5, Circulating water inlet pipe 6 and the water inlet pipe 7 of fish tank for aquaculture nursery are injected into each fish tank 801 li; When the water level line of the drainage kit group 9 indicates 925 for seedling cultivation, most of the water and solid dirt will be sucked into the collection box 901 through the water inlet pipe 905, and a small amount of water and surface dirt will overflow from the top of the collection box 901 box wall. into the collection box 901; at this moment, large particles of solid matter (mainly uneaten bait) and sick fish can be blocked around the filter screen 902; The water level is lower than the water level in the collection box 901. Utilizing the principle of the connector, the water will pass through the water outlet 919 of the drainage kit group 9 for fish breeding, the sewage pipe 904, the water outlet pipe 10 of the fish tank for aquatic product breeding, and the circulating return pipe 11 and the circulating pool water inlet 15 enter in the circulating pool 12, thereby completing the water circulation of the whole system.

Wherein when the water flows through the biological filter barrel group 3, its working principle is:

1. When the equipment is working, the sewage enters the barrel through the water inlet 305 of the filter barrel 301, and then slowly passes through the sheet-shaped biological filler 310 in the barrel layer by layer, and then overflows into the belt above the filter barrel 302 through the water tank 309. Perforated sieve plate 308; the water overflowing into the perforated sieve plate 308 passes through the small holes on the sieve plate, sprinkles on the biological filler layer 310, and finally reaches the funnel-shaped bottom of the b filter bucket 302, and then flows out of the bucket through the water outlet 306 .

2. The biological filler layer 310 in the filter barrel 301 is completely submerged in water, and the surface of the corrugated sheet-like biological filler 3100 is covered with a microbial film, which plays a role in decomposing and dissolving harmful substances in the water; the sewage passes through biological When there is a narrow space between the fillers, relatively large solid substances in the water are stuck in these narrow spaces, thereby achieving the filtration and accumulation of solid substances, and realizing the effect of solid-liquid separation; these large particles of solid substances accumulated in the filter barrel Within a certain period of time, biological bacteria are naturally decomposed into fine impurities, and these fine impurities are scattered in the water and brought into the b filter barrel 302 by the water flow.

3. The b filter barrel 302 belongs to the trickle filter principle. The biological filler layer 310 in the barrel is completely placed in the air, and the water is further filtered through the biological groups growing on the surface of different sections, so that the filtering (decomposition) effect is more obvious.

4. The blower 14 blows a large amount of air from the air pipe 311 through the blower air pipe 13 to the b filter barrel 302. The air rises from the bottom of the biological filler layer 310 and fully contacts with the water sprinkled from the top of the barrel. This process not only creates a biofilm It provides sufficient oxygen for biological decomposition, and also takes away harmful gases such as hydrogen sulfide and carbon dioxide dissolved in the water. At the same time, the water flowing through the equipment reaches a state of dissolved oxygen saturation, so that the entire aquaculture water is in a state of high dissolved oxygen. State, to ensure the smooth progress of high-density breeding production. This design can fully achieve the effect of high-efficiency dissolved oxygen. Compared with the traditional circulating water process, the utility model completely omits the pure oxygen dissolved water equipment.

5. When the water passes through the biological filler layer 310 in the b filter barrel 302 layer by layer, a large amount of foam is generated due to the collision between the water droplets and the filler, and the foam finally falls to the funnel-shaped part at the bottom of the barrel, and then is discharged out of the barrel through the overflow pipe 312 . The adoption of this design can remove protein, oil and other small organic debris in the water, so that the equipment has the effect of protein separation and further increases the effect of water filtration. Compared with the traditional circulating water process, the utility model completely omits the protein separation equipment.

6. The fine impurities described in process 2 are sprinkled with the water on the biological filler layer 310 of the b filter barrel 302, and are adhered to the biofilm on the surface of the corrugated sheet biological filler 3100 to continue to decompose; the final decomposition product (a small amount of solid particles) are discharged out of the barrel through the protein separation principle described in process 5.

7. After the equipment has been working for a period of time, according to the water quality changes at the water inlet 305 and the water outlet 306 of the equipment, and the amount of total solid matter decomposed by the filter barrel, determine when to backwash the overall equipment; Two filter barrels are filled with water, and the valves of the water inlet 305 and the water outlet 306 are closed, and then a large amount of air is filled from the backwash air pipe 303, and these air are sprayed from the small holes on the backwash air frame 304, and the air in the whole barrel is sprayed out. Agitate the water to wash down the aging biofilm on the surface of the sheet-like biofiller 310; drain all the water in the bucket after multiple inflated recoils, and then open the valve of the equipment to restore the equipment to the filtering state. state.

When water flows through the ultraviolet sterilizing equipment 5, its working principle is:

When working, the main body of the equipment is connected in series in the water treatment pipeline through the water inlet flange 5e and the water outlet flange 5f. The water flowing into the main body of the equipment passes through the main water inlet pipe 5b to supply water to the upper water inlet of each sterilizing unit 5a, and the water entering the sterilizing unit 5a flows through the upper sealing rubber ring 501 and the upper double union ball valve 502 in sequence , the upper tee 504, the semi-transparent pipe 505, the lower tee 504, the lower double live ball valve 502 and the lower sealing rubber ring 501, and finally gather in the main outlet pipe 50d, and then flow back Water treatment pipeline. During this process, when the water flows through the semi-transparent tube 505 of the sterilizing unit 5a, the 253.7nm-based short-wave ultraviolet light emitted by the ultraviolet lamp 512 in the semi-transparent tube 505 kills bacteria and harmful microorganisms in the water.

If a single sterilizing unit 5a fails, the single unit can be maintained by closing the two double-acting ball valves 502 on the sterilizing unit 5a without affecting the work of the entire device.

If a fault occurs in the terminal pipe plug 503, tee 504, semi-transparent pipe 505, external threaded joint 506, internal threaded fastener 507, top seal 508, outlet sealing rubber ring 509, power cord 510, When the O-shaped sealing ring 511, the ultraviolet lamp tube 512, the quartz sleeve 513 and the end positioning part 514 can be closed by closing the two double live ball valves 502 on the sterilizing unit 5a, and the double live ball valves 502 are disassembled to be close to the ultraviolet lamp tube The union on one side of the 512 allows the faulty part to be detached from the main body of the equipment for maintenance without affecting the work of the entire equipment.

If a fault occurs in the top seal 508, the outgoing line sealing rubber ring 509, the power cord 510, the O-shaped sealing ring 511, the ultraviolet lamp 512 and the quartz sleeve 513, it can be closed by closing the two active and active parts on the sterilization unit 5a. Connect the ball valve 502, and unscrew the external thread union 506 from the internal thread fastener 507, then take out the germicidal lamp group from the sterilization unit 5a (as shown in Figure 5-7), and maintain the germicidal lamp group without affecting The whole device works.

When the water flows through the fish tank 8 for aquaculture nursery and the drainage kit group 9 for fish nursery, its working principle is as follows:

Under the working state, the frame structure composed of the support frame 803 and the support legs 807 suspends the fish tank 801, wherein the support frame 803 is embedded in the U-shaped groove edge 802, and the support legs 809 are in contact with the ground (as shown in Figure 4-1); The drain kit group 9 for similar nursery is connected and fixed on the water outlet 805 position of the bottom plate of the fish tank 8 (as shown in Figure 4-2) by the internal thread flange 909 and the external thread nozzle 918 for aquatic product nursery; the water level in the fish tank 801 Located on the water level line to indicate 925 (as shown in Figure 8-3).

During work, the water enters the fish tank 801 through the fish tank inlet pipe 7 connected to the circulating water inlet pipe 6 (as shown in Figure 4-1), and the water entering the fish tank 801 slowly flows to the outlet of the fish tank 801. One end of the water inlet 805 flows, and at the same time, the water flow also brings feces, residual bait and other solid dirt of the fish cultured in the tank to the pollution accumulation area 804 along the inclined arc-shaped tank bottom 806 .

At the same time, as water is continuously added to the fish tank 801, due to the pressure difference between the internal and external water levels, the excess water in the fish tank 801 must enter the collection box 901 through the bottom suction pipe 905, and then the water flows through the filter screen 902 in turn. , the water outlet 919, the socket adjusting part 912, the sewage pipe 904, the externally threaded nozzle 918 and the valve a921, and finally flow out of the fish tank 801 through the pipe at the circulating water interface 923 position.

During this flow process, the suction pipe 905 close to the bottom of the pool will suck the dirt, bait and fish in the dirt accumulation area 804 into the pipe, and then the water with the dirt, bait and fish will flow into the collection box 901 , when flowing through the filter screen 902, residual bait and fish can be filtered out and hoarded in the collection box 901, and the dirt of small particles can continue to flow out of the fish tank 801 through the sewage pipe 904 again. Because the water level in the collection box 901 is not much different from the water level of the fish tank 801, the fish fry with better vitality will swim out of the collection box 901 from the box wall top of the suction bottom tube 905 or the collection box 901, and the dead or poor vitality will swim out of the collection box 901. The fish will always be hoarded in the collection box 901, waiting to be discovered by the breeder and cleaned out of the fish tank 801; the residual bait that has not been eaten by the fish will be picked up by the breeder and the weight will be recorded, so as to determine that the fish tank needs to be reduced next time. How much bait to feed.

In the process described in the last paragraph, since the filter screen 902 can be blocked by sticky fry excrement or tiny residues, a cleaning brush 920 is designed inside the cylindrical filter screen 902, and the bristles of the cleaning brush 920 are connected with the filter The net 902 is in close contact, and the cleaning brush 920 is driven by the motor 916 to rotate continuously, and the bristles will constantly scrape the surface of the filter net 902 to clean it up. This design enables the pool water to pass through the filter screen 902 stably all the time, ensuring long-term and stable operation of the equipment.

When the speed of adding water to the fish tank 801 is greater than the drainage speed of the bottom suction pipe 905, the water level in the fish tank 801 will be controlled at the water level indication 925, so the water enters the collection box 1 from the bottom suction pipe 905, and other water Will overflow into the collection box 901 from the top of the box wall of the collection box 901. This process can discharge floating dirt such as oil stains and foam on the water surface to the outside of the fish tank 801 through the drainage kit, and more thoroughly realizes automatic sewage discharge in the seedling production process.

When the height of the water level in the fish tank 801 needs to be adjusted, this purpose can be achieved by adjusting the depth at which the sewage pipe 904 is inserted into the socket adjustment member 912 .

When it is necessary to harvest fry or pour the pond (i.e. when the fry need to be taken out from the fish tank 801), pull the flashboard pull rod 910 upwards, so that the seedling receiving flashboard 906 connected with it goes up along the guide groove of the slideway guide rail 907 Promote until the seedling receiving port 908 closed by the seedling shutter 906 is in a fully open state. At this moment, the valve a 921 is closed, and the valve b 922 is opened, so that the water no longer flows to the drainage system outside the fish tank 801, but flows out through the fry collection port 924, so that the collection of seedlings and the pouring of the pond can be realized conveniently and quickly. During this adjustment process, the pull bar positioning part 911 and the slideway guide rail 907 ensure that the gate pull bar 910 and the seedling collecting gate 906 are in a straight line and slide up and down smoothly along the vertical direction.

The cooperative use of the fish tank 8 for aquatic nursery and the drainage kit group 9 for fish nursery can continuously suck the dirt at the bottom of the fish tank 801 and sick or bad fry into the collection box 901, and the collection box Filter screen 902 with automatic cleaning function set in 901 is filtered out. The design of the fry collection port 924 makes the operation of harvesting fry and pouring ponds easier and simpler, and minimizes the damage caused by the operation of the fry. Its good effect not only solves many problems such as the untimely and incomplete sewage system of the existing aquaculture nursery tank (pool), but also provides a better way in collecting fry, harvesting fry, observing residual bait and finding out whether the nursery is sick in time. It provides a guarantee for the safe and smooth progress of aquaculture production.

But the circulation pool of this patent, the drainage kit group for fish seedlings and the fish tank structure for aquatic seedlings are applied to fish seedlings, especially to the cultivation of fry less than 10 cm, which can greatly improve the survival rate of seedlings, especially When it is applied to the cultivation of eel fry, it can increase the survival rate of domestically cultivated eel fry from 50%-60% to more than 90%, which greatly relieves the pressure of natural fishing of domestic eel fry. This patent fills the gap in domestic circulating water seedling breeding, and also solves the needs of the majority of farmers for better quality fish fry.

Claims (12)

1. A circulating water fish seedling cultivation system is characterized in that: the system has a circulating pool, and the circulating pool is connected with the water inlet pipe of the biological filter barrel group, and the water inlet pipe of the biological filter barrel group is connected with at least one biological filter barrel group, There is a pipeline pump between the circulating pool and the biological filter tank group, the biological filter tank group is connected to the ultraviolet sterilizing equipment, the ultraviolet sterilizing equipment is connected to the circulating water inlet pipe, and the circulating water return pipe is connected to the circulating pool; there are one or more aquatic nursery With fish tank, the water inlet pipe of each fish tank for aquaculture nursery is connected with the circulating water inlet pipe, and the outlet pipe connected with the outlet of each fish tank for aquaculture nursery is connected with the circulation return pipe; the water outlet of each fish tank for aquaculture nursery is A drainage kit group for fish seedlings is connected to the inside of the fish tank for aquatic seedlings. 2. the circulating water fish seedling cultivation system as claimed in claim 1, is characterized in that: the water inlet pipe of biological filter tank group has connected two biological filter tank groups, and each biological filter tank group is connected with number identical respectively. Ultraviolet sterilizing equipment, circulating water inlet pipe, circulating water return pipe, fish tank for aquaculture nursery, two biological filter tank groups and their connected ultraviolet sterilizing equipment, circulating water inlet pipe, circulating water return pipe, fish tank for aquatic nursery relative to the circulating pool Symmetrical setting. 3. the circulating water fish seedling cultivation system as claimed in claim 1, is characterized in that: The biological filter barrel group is composed of a filter barrel and b filter barrel in series; Both the a filter bucket and the b filter bucket are filled with corrugated sheet-like biological fillers arranged in a vertical direction; the tops of the a filter bucket and the b filter bucket are connected through a water tank; the a filter bucket and the b filter bucket are both buckets The top opening is open, the bottom of the bucket is funnel-shaped, and there are multiple support legs at the bottom of the bucket; the lowest part of the funnel-shaped bottom of the filter bucket a is provided with a main water inlet; the bottom of the funnel-shaped bottom of the filter bucket b is set with main water outlet; Both filter barrel a and filter barrel b are: a recoil air frame is provided under the bottom layer of sheet-like biological filler, and the recoil air frame is composed of a hollow pipe body, and small holes are arranged on the pipe wall. The air flushing frame is welded by hollow stainless steel square tubes, and the interior of the stainless steel square tubes is completely connected. The walls of the stainless steel square tubes are provided with evenly distributed small holes for inflating; Gas flushing pipe; a top fixing frame is fixedly arranged above the uppermost layer of the sheet-shaped biological filler in the filter barrel; A perforated sieve plate with evenly distributed leaking holes is arranged above the top fixing frame of the b filter barrel; an air-filled pipe and an overflow pipe are arranged below the barrel wall in the vertical direction of the b filter barrel; the air-filled pipe The water level is higher than the overflow pipe; The biological filler in the filter bucket a is completely submerged in water, and the surface of the biological filler is provided with a microbial film; The biological filler in the b filter barrel is completely placed in the air, and the surface of the biological filler has biogroups. 4. the circulating water fish seedling cultivation system as claimed in claim 1, is characterized in that: described ultraviolet sterilizing equipment comprises main water inlet pipe and main water outlet pipe, has several sterilizing units arranged side by side, each sterilizing unit The unit includes a pipe body, the water inlet of the pipe body is connected with the main water inlet pipe, the water outlet of the pipe body is connected with the main water outlet pipe, and several ultraviolet lamps are arranged in the pipe body. 5. The circulating water fish seedling cultivation system as claimed in claim 4, characterized in that: the water inlet of the pipe body is located at the side wall of the pipe body, and a double union is connected between the water inlet of the pipe body and the main water inlet pipe Ball valve; the water outlet of the pipe body is located on the side wall of the pipe body, and a double union ball valve is connected between the water outlet of the pipe body and the main water outlet pipe; one end of the pipe body is closed, and the other end is provided with a germicidal lamp group. The germicidal lamp group includes fasteners. The external thread of the fastener is screwed with the internal thread provided at the end of the pipe body to fasten the end of the pipe body. The top seal is fixed inside the fastener, and the top seal is set The several interfaces of the tube are fixed with quartz sleeves inserted into the tube body, and the quartz sleeves are fixed with ultraviolet lamps; One end of the quartz sleeve is closed, and the other end is provided with an outlet sealing rubber ring, and the power supply line of the ultraviolet lamp tube located in the quartz sleeve passes through the through hole provided by the outlet sealing rubber ring. 6. The circulating water fish seedling cultivation system as claimed in claim 1, characterized in that: there is a fish tank for raising aquatic products, the cross section of the fish tank is rectangular, the top of the fish tank is open, and the bottom of the fish tank is an arc type; the bottom of the vertical section of the fish tank is arc-shaped, and the two sides extend from the outside to the inside. 7. The circulating water fish seedling cultivation system as claimed in claim 6, characterized in that: the water inlet of the fish tank is located directly above the fish tank; the lower end of the fish tank bottom is provided with a downwardly sunken sewage There is a water outlet in the sewage area, the end of the water outlet in the fish tank is connected to the drainage kit, and the end outside the fish tank is connected to the return pipe in the circulating water fish nursery system. 8. The circulating water fish seedling cultivation system as claimed in claim 6, characterized in that: the bottom of the fish tank is inclined downward from one end to the other end, and the inclination angle is 10°-30°, and the inclination angle is 10°-30°. The angle between the lowest line of the groove bottom and the horizontal plane; The tops of the four side walls of the fish tank are turned outward to form a U-shaped groove edge; the U-shaped groove is provided with a support frame inside, and several support legs are arranged under the support frame. 9. The system for cultivating fish seedlings in circulating water as claimed in claim 1 is characterized in that: the drainage set of described fish seedlings has a collection box, and the collection box is an open box body; The bottom of the box is provided with two through holes as the water inlet and the water outlet respectively; the water inlet is inserted with a bottom suction pipe; the end of the water outlet located inside the collection box is connected to a filter screen, and the water outlet is located in the collection box One end of the outer side is connected with a sewage pipe through a socket adjusting part, and the sewage pipe is slidably inserted on the socket adjusting part; Below the bottom of the pool. 10. The circulating water fish seedling cultivation system as claimed in claim 9, characterized in that: the filter screen is in the shape of a circular tube, the upper end of the filter screen is closed, and the lower end is fixed on the water outlet of the collection box; the inside of the filter screen is A cleaning brush with a rotating shaft is arranged; the bristles of the cleaning brush are in contact with the filter screen; a motor is fixed on the collecting box, and the above-mentioned rotating shaft is an output shaft of the motor. 11. The system for cultivating fish seedlings in circulating water as claimed in claim 9, characterized in that: the pipe wall of the sewage discharge pipe is provided with a seedling collection port; Both sides of the mouth are provided with two vertical slideway guide rails; between the two slideway guide rails, there is a seedling harvesting ram that can slide up and down; a ram pull rod is connected to the seedling harvesting ram; The upper end of the gate pull rod passes through a pull rod fixing piece with a hole in the middle. 12. The fish seedling cultivation system in circulating water as claimed in claim 9, characterized in that: an external thread nozzle is arranged at the end of the sewage pipe, and an internal thread flange is connected to the external thread nozzle, and the external thread nozzle passes through Pass through the bottom of the nursery pond, the internal thread flange screw is set on the external thread nozzle to fix the sewage pipe on the bottom of the nursery pond; the end of the external thread nozzle is connected to a tee, and one end of the tee is connected through a valve On the waterway interface of the circulating water, the other end is connected to the fish fry collection port through a valve.