CN204540385U - A kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve - Google Patents

Abstract

A kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve, belong to field of aquaculture devices, comprise framework, plastics plain net and float and form.Framework front and back sides, left and right side and bottom surface are encapsulated by plastics plain net, form uncovered net cage type equipment above, and the top outside 4 setting posts of net cage is tied with 1 float respectively, rely on the quiet buoyancy of float to keep grading sieve to exceed the water surface.The mesh of plastics plain net is approximately circular or regular hexagon, selects the plain net of aperture 7mm, 15mm or 25mm, makes serial fry grading sieve.What rely on fry during operation reaches classification object from ease ability.The utility model solves the even sizing screening problem of figure's plat wide type fry high efficiency, avoids fry damaged.

Description

A kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve

Technical field

The utility model relates to field of aquaculture devices, relates to a kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve particularly.

Background technology

In bastard halibut and plaice artificial breeding process, along with the quickening of the growth rate of fry, culture density increases relatively, fry individual difference also can constantly increase, there will be hierarchical phenomenon of ingesting: namely the ingestion ability of larger individual fry is more and more stronger, and less individuality is more and more weak, robs less than feed even at all thereupon, cause " powerhouse is stronger, and weak person is more weak "; Moreover when fry total length reaches more than 20mm, the flounder flounder classes of most cultivation there will be the phenomenon of cannibalism, i.e. the law of nature of so-called " the weak are the prey of the strong " and " survival of the fittest " manifests, and individual difference conference causes killing and devouring and increases the weight of.In order to improve cultivating survival rate and the bait utilization ratio of artificial breeding, in flounder flounder class artificial breeding process, in good time classification must be carried out to fry stage by stage, to ensure that more weak colony also can be grown fully.Current, the way that nursery generally adopts utilizes square mesh or diamond mesh grading sieve to screen, less fry is allowed to enter water body by mesh, larger fry is stayed in sieve, reach the object distinguishing fry size, the specification achieving fry in same seedling water is substantially close, avoids hierarchical and cannibalism of ingesting.But because the central point of square mesh or diamond mesh is not exclusively equal to the distance at edge, the comparatively flat wide bodily form of flounder flounder class in addition, in sizing screening process, there is the individual size heterogeneity of fry that stays in the uneven and grading sieve of classification to a certain degree phenomenon bigger than normal in the current grading sieve generally adopted; Particularly in the initial stage of sizing screening, because fry individuality is less and more tender, when fry swims across square mesh or diamond mesh grading sieve with different orientation or attitude, because of flounder flounder class special shape and the unmatched reason of mesh diameter, always cause the damage that the fin limit of some individuals is subject in various degree, in later stage cultivating process, be vulnerable to the infection of germ, affect survival rate.Therefore need to improve the square mesh of original fry grading sieve or diamond mesh, develop a kind of novel flounder flounder class artificial breeding fry grading sieve, to guarantee in classification process, fry can either pass through mesh smoothly, can avoid again the injured and problem of part fry, the problem includes: the larger problem of classification deviation.

Summary of the invention

The technical problems to be solved in the utility model is to provide a kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve, for the problems referred to above that prior art exists, devise this fry grading sieve there is classification evenly, the injured less feature of fry, and the graded series of Different growth phases fry can be carried out.

The utility model realizes by following technical proposal:

A kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve, comprise framework, mesh sheet and float; Described framework is cuboid; Described mesh sheet is plastics plain net, and mesh sheet is fixed on surrounding and the bottom surface of framework, forms the net cage of top-open; Described float is strapped in the middle and upper part lateral surface of framework four setting posts, relies on float to emerge on the buoyant support of water whole fry grading sieve top when nursery pond put into by net cage.

Further, described framework comprises long to set a roof beam in place, erect post, erects post interior lining panel and crossbearer beam, longly to set a roof beam in place, erects length, height and width that post and crossbearer beam are respectively framework, erects post interior lining panel and is fixed on and erects on post to supporting and constitutionally stable effect.

Further, described framework specification is 1200mm × 500mm × 400mm, adopts pine bar nail system to form;

Further, described mesh sheet mesh aperture is 7mm, 15mm or 25mm; The large mesh of 25mm is based on regular hexagon, and the little mesh of 7mm is approximately circular, and mesh sheet thickness is at about 0.8-1.2mm;

Further, described float is cylindrical foam float, long 200mm, diameter 100mm, center bore 40mm, quiet buoyancy 2.70kgf (kilogram), 4, be strapped in the top in the outside of 4 setting posts of net cage respectively with nettle, during operation, rely on the quiet buoyancy of 4 floats to swim in reposefully on the water surface, make net cage maintenance suitable for reading exceed the water surface about 90-110mm, avoid fry to jump out;

Described one, from ease formula net cage type bastard halibut and plaice seedling grading sieve, according to the needs of nursery different phase and fry size fractionation, can be selected the mesh sheet of mesh aperture 7mm, 15mm and 25mm, make serial fry grading sieve.

The utility model beneficial effect compared with prior art:

During graded operation, the nursery pond injecting certain water yield is put into by from ease formula net cage type bastard halibut and plaice seedling grading sieve, operate from needing the nursery pond band water of classification, the container such as Plastic Drum or basin is used to pull fry out, pour into gently in grading sieve, do not need to drive fry and vibration separation screen frames, the wide fry being less than mesh aperture of body just can outwards escape from mesh to following current voluntarily, enter nursery pond, the comparatively advanced fry that body is wider than mesh aperture is then stayed in grading sieve, when large individual fry reaches certain quantity, fish for net cage, large individual fry is moved into another nursery pond, reach sizing screening, object is raised by unified specification.The utility model has the advantages that, the mesh of sub-circular is even to the classification of expanded letter state flounder sole seedling, and can reduce fry and swim across mesh and be stuck or probability to the damage of fry fin limit; Net cage type flounder sole seedling grading sieve capacity is large, and breakneck acceleration is fast, improves survival rate; The raw material drawing making grading sieve is easy to get, cheap, and manufacture craft is simple, easy and simple to handle; The efficiency of separation is high, and reduce recruitment, labor strength is low; The mesh specification of mesh sheet can be arranged according to fry specification and the needs in producing, and is easy to apply; Frame light is firm, carries convenient transportation.

Accompanying drawing explanation

Fig. 1: from ease formula net cage type bastard halibut and plaice seedling grading sieve structural representation: 1. plastics plain net (1a. spacer screen sheet, side mesh sheet before and after 1b., 1c. left and right sides mesh sheet), 2. framework, 3. float;

Fig. 2: from ease formula net cage type bastard halibut and plaice seedling grading sieve frame structure schematic diagram: 3. float, 4. length is set a roof beam in place, and 5. erects post, 6. crossbearer beam, 7. erects post interior lining panel.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described.

A kind of from ease formula net cage type bastard halibut and plaice seedling grading sieve, as shown in Figure 1, the one of the utility model indication is from ease formula net cage type bastard halibut and plaice seedling grading sieve, and its structure comprises framework 2, plastics plain net 1 and float 3.As shown in Figure 2, framework 2 by long setting a roof beam in place 4, erect post 5, erect post interior lining panel 7 and crossbearer beam 6 forms; Described mesh sheet is plastics plain net, is fixed on surrounding and the bottom surface of framework, forms the net cage of top-open; Described float is strapped in the middle and upper part lateral surface of framework four setting posts.

Described framework 2 specification is 1200mm × 500mm × 400mm, adopts pine bar nail system to form.Be that the pine bar of 16mm × 38mm is cut into different 16 of length by cross section, wherein, the pine bar of 4 long 1200mm sets a roof beam in place 4 as 4 of fry grading sieve are long, the pine bar of 4 long 500mm is as crossbearer beam 6, the pine bar of 4 long 400mm is as setting post 5, in addition, the pine bar of 4 long 324mm, as setting post interior lining panel 7, reserves the allowance of certain length during blanking.First with nail, 4 long 324mm are erect the stickfast of post interior lining panel 7 on the setting post of 4 long 400mm, both become as a whole, keep erectting the vacant 38mm in post two ends simultaneously, then the length of 4 long 1200mm is set a roof beam in place 4 and 4 long 500mm crossbearer beam 6 respectively respectively stickfast on 4 setting posts 5, form a hexahedral wood frame of rectangle;

Further, described mesh sheet is cultivate special novel polyethylene plastics plain net, and plastics plain net has another name called plastics culturing net.Select mesh aperture to be that wherein a kind of in the plastics plain net of 7mm, 15mm and 25mm makes, the grading sieve of 3 kinds of specifications can be produced respectively; Spacer screen sheet 1a: specification is the mesh sheet 1 of 1200mm × 500mm, is placed in the bottom of framework 2, then to set a roof beam in place 4 and crossbearer beam 6 plastic covering plain net edge fastening with nails along the length bottom framework 2 with batten; Before and after side mesh sheet 1b: specification is the mesh sheet 2 of 1200mm × 400mm, is placed in the both sides, front and back of framework 2, sets a roof beam in place 4 and erect post 5 plastic covering plain net edge and fasten with nails with batten along the length of framework 2; Left and right sides mesh sheet 1c: specification is the mesh sheet 2 of 500mm × 400mm, is placed in the left and right sides of framework 2, with batten along the crossbearer beam 6 of framework 2 with erect post 5 plastic covering plain net edge and fasten with nails; To which form an all around and bottom is all encapsulated by mesh sheet, and the net cage type fry grading sieve opened wide above only having;

Described float 3 is cylindrical foam float, long 200mm, diameter 100mm, center bore 40mm, quiet buoyancy 2.70kgf (kilogram), 4, is strapped in the top in the outside of 4 setting posts 5 of net cage respectively with nettle; From ease formula net cage type flounder sole seedling grading sieve when nursery pond carries out graded operation, rely on the quiet buoyancy of 4 floats 3 to swim in reposefully on the water surface, note the height of adjustment 4 floats 3, make net cage maintenance suitable for reading exceed the water surface about 100mm, avoid fry to jump out;

Further, described one is from ease formula net cage type bastard halibut and plaice seedling grading sieve, according to the different phase of fry rearing and the needs of fry size fractionation, mesh aperture can be selected to be the plastics plain net of 7mm, 15mm or 25mm, to make the serial fry grading sieve being applicable to different phase needs.

Concrete operations are as follows: at lefteye flounder fry the volt end, enter to seek the end completely and to dwell life, now start the cultivation of fry later stage, need classification therebetween 3 ~ 4 times; Because the following seedling of lefteye flounder fry total length 50mm, when individual difference is more than 5mm, mutual seriously residual, must sorting in time.As screened the fry of lefteye flounder about total length 15mm, the mesh aperture first selected is the fry grading sieve of 7mm; First grading sieve is put into the nursery pond of about depth of water 400mm, scooped out by fry with Plastic Drum or other containers, pour grading sieve into gently, fry escapes in pond voluntarily from mesh; Then lift grading sieve, the large gauge fry be left is moved into another new nursery pond, reaches the object of sizing screening in grading sieve.

2012 ~ 2014 years, in Qingdao, loyal seawater produces in Co., Ltd and Huanghai Aquatic Products Co., Ltd., Haiyang City's Paralichthys olivaceus, Paralichthys lethostigma nursery and verasper variegate seedling raising process, respectively three classifications are carried out to the lefteye flounder fry of total length 15mm ~ 50mm, Paralichthys lethostigma fry, Cynoglossus semilaevis fry and verasper variegate fry with from ease formula net cage type bastard halibut and plaice seedling grading sieve, all achieve good effect; Classification is even, and fry classification efficiency significantly improves, the basic not damaged of fry; After fry classification, bait feeding is accurate, ensure that the synchronism of seed rearing, and growth rate and training shoot survival percent all improve.

To the above-mentioned explanation of the disclosed embodiments, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (4)

1., from an ease formula net cage type bastard halibut and plaice seedling grading sieve, it is characterized in that its structure comprises framework (2), mesh sheet (1) and float (3); Described framework (2) is cuboid; Described mesh sheet is plastics plain net (1), and mesh sheet is fixed on surrounding and the bottom surface of framework (2), forms the net cage of top-open; Described float (3) is strapped in the middle and upper part lateral surface of framework (2) four setting posts (5), relies on float (3) to emerge on the whole grading sieve top of the buoyant support of water when nursery pond put into by net cage.

2. grading sieve according to claim 1, it is characterized in that described framework comprises length and sets a roof beam in place, erects post, erects post interior lining panel and crossbearer beam, described length is set a roof beam in place, erect length, height and width that post and crossbearer beam are respectively framework, erects post interior lining panel and is fixed on and erects on post.

3. grading sieve according to claim 1, is characterized in that described framework (2) specification is 1200mm × 500mm × 400mm, adopts pine bar nail system to form; 4 floats (3) are strapped in the top in the outside of 4 setting posts (5) of net cage respectively with nettle, rely on the quiet buoyancy of float (3) to swim in reposefully on the water surface during operation, make net cage maintenance suitable for reading exceed water surface 90-110mm.

4. grading sieve according to claim 1, is characterized in that described mesh sheet mesh aperture is 7mm, 15mm or 25mm.