CN2834166Y - Chinese sturgeon baby fish cultivation device - Google Patents

Abstract

The utility model relates to a baby fish cultivation device of a Chinese sturgeon, particularly a device for cultivating special type fish, and the baby fish cultivation device is provided with a plastic or glassteel barrel body, wherein the center of the bottom of the barrel body is extended in turn with jacks of which the large and the small stages are coaxially connected towards the outer side of the body, a small hole is inserted with an overflow pipe stood in the barrel body and a large hole is inserted with a filter pipe sheathed outside the overflow pipe. The surface of the barrel body is provided with a rotary spray head, the spray head is connected with a water delivery pipe from a water treatment device through a valve, an air exhausting stone is arranged in the barrel body and the air exhausting stone is connected with a soft pipe which is led to compressed air or pure oxygen source. The utility model solves the requirement that the baby fish cultivation of a Chinese sturgeon needs providing water body with continuous cleaning, enriched oxygen and proper flow speed and reduces the scratch of baby fish in action through smooth inner wall.

Description

Mandarin sturgeon juvenile fish breeding arrangement

Technical field:

The utility model relates to the device of extraordinary fish culture, especially the breeding arrangement of mandarin sturgeon juvenile fish.

Background technology:

Mandarin sturgeon belongs to Gadiformes, sturgeon section, and individual very large, growth is fast, and the life-span is long, is the distinctive a kind of large-scale economic sturgeon class of China, once is the important fishery harvesting object of Upper Yangtze River.Because influence of various factors such as the construction of river construction, the aggravation of water pollution and catching intensity increases, mandarin sturgeon nature population quantity decays year by year, and its resource is endangered, is classified as animals under first-class state protection by Chinese Government.For the decay that slows down mandarin sturgeon nature population and recover the mandarin sturgeon natural resources gradually, when the mandarin sturgeon natural resources is strengthened protection, also got involved the help of technology---release to natural water with the artificial propagation young.

By the prelarva (just having hatched) that artificial propagation obtains, can not directly just release, also long to necessary specification through cultivating, releasing just may reach satisfied survival rate.Because the initial stage people are also complete not to the utmost to the grasp of the physilogical characteristics of mandarin sturgeon prelarva and juvenile fish and habit, so, in the artificial propagation success seventies time of two later more than ten years, the survival rate that young sturgeon is cultivated generally all is lower than 10%, only has few time to reach 20%.By the discovery of probing into for many years, young sturgeon suits to grow in the water of cleaning, oxygen enrichment, appropriate flow velocity, and hobby is pasted end activity, and the body surface delicacy easily is scratched.And used in the past breeding arrangement, mostly be square concrete sump, there is the dead angle easily to shelter evil people and countenance evil practices, wall is a cement sand pulp, coarsely easily hinder fish, sewage draining exit is located at an end at the bottom of the pond, pond water self-cleaning weak effect, the adjusting of water volume flow rate can only rely on the size of regulating flow to realize, can not be implemented in the constant situation downward modulation throttling speed of flow or stablize flow velocity under the situation that increases flow.This breeding arrangement incompatibility mandarin sturgeon juvenile fish physiology of development characteristics require and behavioural characteristic, thereby survival rate is difficult to improve.

Summary of the invention:

The purpose of this utility model is to provide a kind of its structure to adapt to mandarin sturgeon prelarva and juvenile fish physilogical characteristics and behavioural characteristic for producing big specification juvenile fish in batches, can obtain the mandarin sturgeon juvenile fish breeding arrangement of high survival rate.

Above-mentioned purpose is to be achieved according to such technical scheme: the circular staving that an inner wall smooth is set, do with the plastic and glass steel, its bottom centre is to the external continuous jack of large and small two-stage coaxial that extends successively, insert the overflow pipe that stands in the staving in the aperture, insert the screen pipe that is placed in outside the overflow pipe in the macropore, but at the deflection shower nozzle of bucket face setting in bucket, shower nozzle through valve with link from the water-supply-pipe of water treatment facilities, gas exhausting stone is set in the staving, and gas exhausting stone links with the flexible pipe that leads to compressed air gas source or pure oxygen source of the gas.

Mandarin sturgeon juvenile fish breeding arrangement with above-mentioned places on the sewer in its center, has connected water source and source of the gas.Treated water is in shower nozzle input staving, and its middle water level determines that by overflow pipe unnecessary water is discharged to sewer through overflow pipe, forms single rotation direction flowing water in bucket; Under the effect of single rotation direction flowing water centripetal force, dirt passes the screen pipe tube wall and gathers in pipe in the water, makes the water self-cleaning; Compressed air or pure oxygen intersperse among in the water through gas exhausting stone, make Shuifu County's oxygen; Dialled overflow pipe, the dirt of accumulation is discharged with current; Operated valve is to regulate flow, and the deflection angle that changes shower nozzle is to regulate flow velocity.

The utility model compared with prior art, the advantage that is had is:

1. breeding arrangement meets mandarin sturgeon young swimming behavior feature by the former square circle that changed into, makes the fish body can reach even distribution in water body, has improved the availability of water body.

2. in circular staving central authorities plug-in type overflow pipe and overcoat screen pipe are set, can realize the self-cleaning of water by rotating and centralizing power, good purification has alleviated the labour intensity of manpower blowdown simultaneously.

3. but deflection shower nozzle and valve are set in device, make the easy to adjust of water flow and flow velocity, effect is directly perceived, and is simple to operate.

4. setting and the gas exhausting stone that compressed air or pure oxygen source of the gas communicate in device significantly improved the oxygen supply situation to young sturgeon, promotes its healthy growth fast.

5. change plastics or glass fiber reinforced plastics product into as sturgeon larval culture carrier by concrete sump, wall is smooth, has alleviated prelarva and juvenile fish significantly and has sunk to the bottom scratch in the activity, and in addition, movement is convenient, but plug and play has shortened dramatically the preparatory period of shifting between the base.

The resultant effect of above-mentioned advantage illustrates that the utility model has possessed the various conditions that adapt to mandarin sturgeon prelarva and juvenile fish growth, evidence for many years, and cultivating survival rate can reach more than 80%, thereby this device can be used for the batch process of mandarin sturgeon juvenile fish fully.

Description of drawings:

Accompanying drawing is the stereogram of the utility model broken section.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing.

Staving 8 is a truncated cone-shaped, the center of its bottom, to the external coaxial continuous jack of large and small secondary that extends successively, insert the overflow pipe 5 that stands in the staving in the aperture, insert the screen pipe 4 that is placed in outside the overflow pipe in the macropore, this routine staving 8, overflow pipe 5, screen pipe 4 all adopt plastic products, require smooth surface.Overflow pipe 5 is determined according to the water level of setting at the height more than at the bottom of the bucket, take into account in different water levels and also can use, can leave the gap 9 of differing heights on the wall of overflow pipe, water level is determined by minimum gap, when being used for higher water level, seal this gap below water level with adhesive plaster.The filter opening of leaving on screen pipe 4 tube walls 10 can be circle, also can be strip, and the minimum dimension on the filter opening should only allow dirt pass less than prelarva, can change the chimney filter of big filter opening according to the prelarva growth, to improve filter effect.The overall area of passage of filter opening should be greater than 10 times of sectional area in the overflow pipe.But deflection shower nozzle 7 adopts a pair of being advisable, and splits in the screen pipe both sides in the bucket face, and mounting ball valve 3 before each shower nozzle links whole being supported on barrel wall by three-way pipe 1 and water-supply-pipe from water treatment facilities.The quantity of gas exhausting stone 6 is definite according to the water quality design, and the flexible pipe 2 that links with compressed air gas source is installed on the pipe joint of gas exhausting stone, and gas exhausting stone is suspended from the water of 5cm at the bottom of the bucket.

Claims (6)

1. mandarin sturgeon juvenile fish breeding arrangement, it is characterized in that, circular staving with inner wall smooth, the external continuous jack of large and small two-stage coaxial that extends successively of the middle mind-set of its bottom is inserted with the overflow pipe that stands in the staving in the aperture, be inserted with in the macropore and be placed in the outer screen pipe of overflow pipe, but the staving face is provided with the deflection shower nozzle, shower nozzle through valve with link from the water-supply-pipe of water treatment facilities, gas exhausting stone is set in the staving, gas exhausting stone links with the flexible pipe that leads to compressed air or pure oxygen source of the gas.

2. according to the mandarin sturgeon juvenile fish breeding arrangement of claim 1, it is characterized in that, but the deflection shower nozzle that is provided with on the staving face is a pair of, splits the both sides at screen pipe.

3. according to the mandarin sturgeon juvenile fish breeding arrangement of claim 1, it is characterized in that, have the gap of differing heights on the wall of overflow pipe.

4. according to the mandarin sturgeon juvenile fish breeding arrangement of claim 1, it is characterized in that the filter opening on the screen pipe is circle or strip.

5. according to the mandarin sturgeon juvenile fish breeding arrangement of claim 1, it is characterized in that gas exhausting stone is suspended in the water by flexible pipe.

6. according to the mandarin sturgeon juvenile fish breeding arrangement of claim 1, it is characterized in that staving is plastic products or glass fiber reinforced plastics product.