CN112471028A - Open-air system of domesticating of east sea large yellow croaker releasing - Google Patents
Open-air system of domesticating of east sea large yellow croaker releasing Download PDFInfo
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- CN112471028A CN112471028A CN202011448903.8A CN202011448903A CN112471028A CN 112471028 A CN112471028 A CN 112471028A CN 202011448903 A CN202011448903 A CN 202011448903A CN 112471028 A CN112471028 A CN 112471028A
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- 241001596950 Larimichthys crocea Species 0.000 title claims abstract description 86
- 238000009360 aquaculture Methods 0.000 claims abstract description 80
- 244000144974 aquaculture Species 0.000 claims abstract description 80
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 230000000903 blocking effect Effects 0.000 claims description 80
- 238000009395 breeding Methods 0.000 claims description 18
- 230000001488 breeding effect Effects 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 16
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims 1
- 238000009313 farming Methods 0.000 claims 1
- 238000009372 pisciculture Methods 0.000 claims 1
- 230000004083 survival effect Effects 0.000 abstract description 24
- 206010021143 Hypoxia Diseases 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 241000251468 Actinopterygii Species 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 241001417494 Sciaenidae Species 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241001233242 Lontra Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 241000894007 species Species 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
- Y02A40/81—Aquaculture, e.g. of fish
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Abstract
The invention discloses a releasing field domestication system for east China sea large yellow croakers, and aims to provide a releasing field domestication system for east China sea large yellow croakers, which can carry out field domestication on east China sea large yellow croaker fries so as to improve the survival rate of the east China sea large yellow croaker fries released into a sea area. The water-saving aquaculture device comprises a main aquaculture device, wherein the main aquaculture device comprises an annular floating frame floating on the water surface and a main aquaculture net cage fixed on the annular floating frame, and the upper end of the main aquaculture net cage is provided with an opening; the net cage counterweight sinks to the seabed and is connected with the annular floating frame through a net cage anchor rope; the internal culture devices comprise net cage floating frames and internal culture net cages fixed on the net cage floating frames, and the net cage floating frames float on the water surface in the annular floating frames.
Description
Technical Field
The invention relates to a large yellow croaker domesticating device, in particular to a east China sea large yellow croaker releasing field domesticating system.
Background
Fishery resource protection and recovery is a very important proposition at present, and is one of the important matters of the 2030 agenda of the united nations. The sustainable development of the united nations has 17 agendas, the 14 th agenda is the protection of biodiversity, the important point is the recovery problem of the exhausted fishery resources, and the problem is concerned by all countries in the world. Meanwhile, fishery resource protection and recovery are important strategic targets for building marine ecological civilization in China and guarantee of joy of the boat and mountain fishing ground.
Wild large yellow croakers in traditional fishery resources are the species with the highest economic value and highest consumer brand recognition in China, and the success of the seedling culture of the large yellow croakers in the east China sea has become a resource condition for providing necessary germplasm resource supplement in recent years. The conventional fish fry after the successful fry breeding of the large yellow croaker in the east China sea generally adopts a direct releasing mode and is released to a specified sea area; although the mode is helpful for recovering the east-sea large yellow croaker in the sea area, the survival rate of the east-sea large yellow croaker is not high because the east-sea large yellow croaker fry successfully cultured is directly released into the sea area without being domesticated in the field.
Disclosure of Invention
The invention aims to provide a east China sea large yellow croaker releasing field domestication system which can carry out field domestication on east China sea large yellow croaker fries so as to improve the survival rate of the east China sea large yellow croaker fries released into the sea area.
The second purpose of the invention is to provide a east China sea large yellow croaker releasing field domestication system which can automatically adjust according to the actual situation of the tidal current so as to avoid the problem that the too small or too large tidal current affects the field domestication effect and domestication survival rate of the east China sea large yellow croaker fry.
The technical scheme of the invention is as follows:
a open-air domestication system of east China sea large yellow croaker releasing, includes:
the main breeding device comprises an annular floating frame floating on the water surface and a main breeding net cage fixed on the annular floating frame, and the upper end of the main breeding net cage is opened;
the net cage counterweight sinks to the seabed and is connected with the annular floating frame through a net cage anchor rope;
the internal culture devices comprise net cage floating frames and internal culture net cages fixed on the net cage floating frames, and the net cage floating frames float on the water surface in the annular floating frames.
After the seedling culture of the east-sea large yellow croaker is successful, the east-sea large yellow croaker is placed into an internal culture device for field domestication, the internal culture device is positioned in the main culture net cage, the water area environment in the internal culture device is stable, and the east-sea large yellow croaker is favorable for field domestication and survival of the east-sea large yellow croaker; after the east-sea large yellow croaker fries are domesticated in the internal breeding device for a period of time, the east-sea large yellow croaker fries are moved into the main breeding net cage for further field domestication, the water area environment in the main breeding net cage is closer to the environment of the external sea area, and after the east-sea large yellow croakers are domesticated in the internal breeding net cage and the main breeding net cage in the field, the east-sea large yellow croakers are released into the external sea area, so that the survival rate of the east-sea large yellow croaker fries released into the sea area can be effectively.
Preferably, the meshes of the main aquaculture net cage are larger than the meshes of the inner aquaculture net cage.
Preferably, the net cage floating frame is connected with the annular floating frames through floating frame connecting ropes, and the annular floating frames of any two adjacent inner culture devices in each inner culture device are connected through the floating frame connecting ropes. Therefore, the relative position between the inner culture devices is ensured to be stable.
Preferably, the self-elevating tidal current flow blocking device for the falling tide comprises a first connecting rope, a first flow blocking screen plate positioned on the outer side of the main aquaculture net cage, a first floating frame floating on the water surface, a first floating frame counterweight sinking to the sea bottom and a first anchor rope connecting the first floating frame and the first floating frame counterweight, wherein a first bracket is arranged on one side of the annular floating frame facing the coast and positioned above the water surface, a first guide ring is arranged on the first bracket, the first flow blocking screen plate and the first bracket are positioned on the same side of the main aquaculture net cage, the first floating frame and the first bracket are positioned on two opposite sides of the main aquaculture net cage, one end of the first connecting rope is connected with the first floating frame, the other end of the first connecting rope penetrates through the first guide ring and is connected with the upper end of the first flow blocking screen plate, and the upper end of the first flow blocking screen plate is suspended below the first guide ring through the first connecting rope, the first connecting rope is provided with a first upper limiting piece and a first lower limiting piece, the first lower limiting piece is positioned below the first guide ring,
when the first flow-resisting net plate is hung on the first guide ring through the first upper limiting piece on the first connecting rope, the upper edge of the first flow-resisting net plate is positioned below the bottom surface of the main aquaculture net cage or close to the bottom surface of the main aquaculture net cage; when the first lower limiting piece abuts against the first guide ring, the upper edge of the first flow blocking net plate is close to the water surface.
When tide falls, when the tidal current flow rate is smaller than a set value V1, the first flow blocking screen plate sinks downwards under the action of self weight until the first upper limiting piece abuts against the first guide ring, and at the moment, the first flow blocking screen plate is hung on the first guide ring through the first upper limiting piece on the first connecting rope; when the tidal current flow rate is larger than a set value V1, the first floating frame overcomes the gravity of the first flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the first flow blocking screen plate to move upwards through the first connecting rope until the first lower limiting part abuts against the first guide ring.
The culture net cage is adopted to carry out field domestication on the east-sea large yellow croaker fry, although the releasing survival rate of the domesticated thickness east-sea large yellow croaker can be improved; however, the common culture net cage does not have the tidal current regulation capability, the requirement of field domestication of the east-sea large yellow croaker fries on the tidal current of the sea environment is higher, the tidal current cannot be too large or too small, the normal life of the east-sea large yellow croaker fries can be influenced by too large tidal current, and even the survival rate is influenced by the injury of the east-sea large yellow croaker fries; the small tidal current is not only not beneficial to the field domestication of the large yellow croaker fries in the east China sea, but also can cause the fry in the box to die due to oxygen deficiency; in order to solve the problem, the self-lifting tidal current flow blocking device for the tide falling is arranged, and particularly, when the tidal current flow rate is smaller than a set value V1 during the tide falling, the upper edge of the first flow blocking net plate is positioned below the bottom surface of the main aquaculture net box or close to the bottom surface of the main aquaculture net box, so that the tidal current can smoothly flow through the main aquaculture net box, the problem that the outdoor domestication effect is influenced due to too small tidal current, and even fish fries in the box die due to oxygen deficiency is avoided; when the tidal current flow rate is greater than a set value V1, the first floating frame overcomes the gravity of the first flow-blocking screen plate under the action of tidal current, so that the first flow-blocking screen plate moves upwards, the upper edge of the first flow-blocking screen plate is close to the water surface, the tidal current is blocked by the first flow-blocking screen plate, and the tidal current flowing through the main aquaculture net cage is reduced, so that the problem that the normal life of the east-sea large yellow croaker fry is influenced due to overlarge tidal current flowing through the main aquaculture net cage, even the east-sea large croaker fry is injured, and the survival rate is influenced is solved; therefore, the device can automatically adjust according to the actual situation of the tidal current to avoid the problem that the field domestication effect is influenced by too large or too small tidal current and even the domestication survival rate of the large yellow croaker fry is affected.
Preferably, the first screen plate comprises a first upper connecting plate, a first guiding hole arranged on the first upper connecting plate, a first guiding rod arranged in the first guiding hole in a sliding manner, a first fixed screen plate and a first floating screen plate which are arranged below the first upper connecting plate, a first spoiler arranged below the first floating screen plate, a first limiting plate arranged at the upper end of the first guiding rod, a first limiting block arranged on the first guiding rod and arranged between the first upper connecting plate and the first limiting plate, and a first compression spring arranged between the first upper connecting plate and the first limiting plate, wherein the upper end of the first fixed screen plate is fixed on the first upper connecting plate, the first floating screen plate, the first fixed screen plate and the first guiding rod are parallel to each other, the upper end of the first floating screen plate is connected with the lower end of the first guiding rod, and the first compression spring is used for driving the first guiding rod to move upwards, until the upper end of the first fixed screen plate is abutted against the first upper connecting plate, the first spoiler is perpendicular to the first guide rod, the first spoiler is connected with the first floating screen plate through a connecting piece, and the other end of the first connecting rope is connected with the first upper connecting plate of the first spoiler screen plate;
when the upper end of the first fixed screen plate is abutted against the first upper connecting plate, the meshes of the first floating screen plate are distributed opposite to the meshes of the first fixed screen plate.
When tide falls, when the tidal current flow rate is greater than a set value V2, the acting force of the tidal current acting on the first spoiler overcomes the acting force of the first compression spring, so that the first floating screen plate moves axially along the first guide hole until the first limiting block abuts against the first upper connecting plate, and at the moment, the meshes of the first floating screen plate and the meshes of the first fixed screen plate are distributed in a staggered manner; the set value V2 is greater than the set value V1.
Therefore, when tide flows at a speed greater than a set value V2, the set value V2 is greater than a set value V1, the acting force of the tide acting on the first spoiler overcomes the acting force of the first compression spring, and meshes of the first floating mesh plate and meshes of the first fixed mesh plate are distributed in a staggered manner, so that the resistance of the first flow blocking mesh plate is further increased, the tide flowing through the main aquaculture mesh box is further reduced, the problem that the normal life of the large yellow croaker fry in the east sea is influenced due to the fact that the large yellow croaker fry in the east sea is injured even is avoided, and the survival rate is influenced is solved.
Preferably, the annular floating frame is annular, the main aquaculture net cage is cylindrical, the cross section of the first flow-resisting net plate is arc-shaped, and the axis of the first flow-resisting net plate and the main aquaculture net cage are positioned on the same side of the first flow-resisting net plate.
Preferably, the annular floating frame is annular, the main aquaculture net cage is cylindrical, the cross sections of the first fixed net plate and the first floating net plate are arc-shaped, and the axis of the first fixed net plate and the main aquaculture net cage are positioned on the same side of the first flow blocking net plate.
Preferably, the self-elevating tidal current flow blocking device for tide elevation comprises a second connecting rope, a second flow blocking net plate positioned outside the main aquaculture net cage, a second floating frame floating on the water surface, a second floating frame counterweight sinking to the sea bottom and a second anchor rope connecting the second floating frame and the second floating frame counterweight, wherein one side of the annular floating frame is provided with a second bracket, the second bracket and the first bracket are positioned at two opposite sides of the annular floating frame, the second bracket is positioned above the water surface, the second bracket is provided with a second guide ring, the second flow blocking net plate and the second bracket are positioned at the same side of the main aquaculture net cage, the second floating frame and the second bracket are positioned at two opposite sides of the main aquaculture net cage, one end of the second connecting rope is connected with the second floating frame, the other end of the second connecting rope penetrates through the second guide ring and is connected with the upper end of the second flow blocking net plate, the upper end of the second flow blocking screen plate is hung below the second guide ring through a second connecting rope, a second upper limiting piece and a second lower limiting piece are arranged on the second connecting rope, the second lower limiting piece is positioned below the second guide ring,
when the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope, the upper edge of the second flow-resisting net plate is positioned below the bottom surface of the main aquaculture net cage or close to the bottom surface of the main aquaculture net cage; when the second lower limiting piece abuts against the second guide ring, the upper edge of the second flow blocking net plate is close to the water surface.
When tide rises and the tidal current flow rate is less than a set value V1, the second flow-resisting net plate sinks downwards under the action of self weight until the second upper limiting piece abuts against the second guide ring, and at the moment, the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope; when the tidal current flow rate is larger than a set value V1, the second floating frame overcomes the gravity of the second flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the second flow blocking screen plate to move upwards through the second connecting rope until the second lower limiting piece abuts against the second guide ring.
The requirement of field domestication of the east-sea large yellow croaker fries on the tide of the sea environment is high, the tide cannot be too large or too small, the normal life of the east-sea large yellow croaker fries can be influenced by the too large tide, and even the east-sea large yellow croaker fries are injured to influence the survival rate; the small tidal current is not only not beneficial to the field domestication of the large yellow croaker fries in the east China sea, but also can cause the fry in the box to die due to oxygen deficiency; in order to solve the problem, the self-lifting tidal current flow blocking device for tidal current rise is arranged, and particularly, when the tidal current flow rate is smaller than a set value V1 in the tidal current rise, the upper edge of the second flow blocking net plate is located below or close to the bottom surface of the main aquaculture net box, so that tidal current can smoothly flow through the main aquaculture net box, the problem that the outdoor domestication effect is influenced due to too small tidal current, and even fish fries in the box die due to oxygen deficiency is avoided; when the tidal current flow rate is larger than a set value V1, the second floating frame overcomes the gravity of the second flow-blocking screen plate under the action of tidal current, so that the second flow-blocking screen plate moves upwards, the upper edge of the second flow-blocking screen plate is close to the water surface, the tidal current is blocked by the second flow-blocking screen plate, the tidal current flowing through the main aquaculture net cage is reduced, the situation that the normal life of the east-sea large yellow croaker fry is influenced due to overlarge tidal current flowing through the main aquaculture net cage is avoided, even the east-sea large yellow croaker fry is injured, and the problem of influencing the survival rate is
Preferably, the upper end of the internal aquaculture net cage is opened.
Preferably, the annular floating frame is annular, the main aquaculture net cage is cylindrical, the net cage floating frame is annular, and the inner aquaculture net cage is cylindrical.
The invention has the beneficial effects that:
firstly, the wild domestication of the large yellow croaker fry in the east China sea can be realized, so that the survival rate of the large yellow croaker fry released into the sea area is improved.
Secondly, the method can automatically adjust according to the actual situation of the tidal current to avoid the problem that the survival rate of the large yellow croaker fries is influenced by too large or too small tidal current.
Drawings
Fig. 1 is a top view of a east China sea large yellow croaker releasing field domestication system according to a first embodiment of the present invention.
Fig. 2 is a top view of a east China sea large yellow croaker releasing field domestication system according to a second embodiment of the present invention.
Fig. 3 is a front view of a east China sea large yellow croaker releasing field domestication system according to a second embodiment of the present invention.
Fig. 4 is a partial enlarged view of a portion a of fig. 3.
Fig. 5 is a schematic structural view of a first screen plate according to a second embodiment of the present invention.
In the figure:
the system comprises a main culture device 1a, an annular floating frame 1a.1 and a main culture net cage 1 a.2;
the system comprises an internal culture device 1b, a net cage floating frame 1b.1 and an internal culture net cage 1 b.2;
a floating frame connecting rope 1 c;
the self-lifting tidal current flow blocking device for tide falling comprises a self-lifting tidal current flow blocking device 2, a first connecting rope 2.1, a first floating frame 2.2, a first flow blocking screen plate 2.3, a first upper connecting plate 2.31, a first fixing screen plate 2.32, a first floating screen plate 2.33, a first guide hole 2.34, a first guide rod 2.35, a first limiting plate 2.36, a first limiting block 2.37, a first compression spring 2.38, a first flow blocking plate 2.39, a first support 2.4, a first floating frame counterweight 2.5, a first anchor rope 2.6, a first guide ring 2.7, a first upper limiting part 2.8 and a first lower limiting part 2.9;
the self-lifting tidal current flow blocking device 3 for flood tide, a second connecting rope 3.1, a second floating frame 3.2, a second flow blocking screen plate 3.3, a second support 3.4, a second floating frame counterweight 3.5 and a second anchor rope 3.6.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In a first embodiment, as shown in fig. 1, a east China sea large yellow croaker releasing field domestication system comprises a main culture device 1a, a net cage counterweight and a plurality of inner culture devices 1b.
The main culture device 1a comprises an annular floating frame 1a.1 floating on the water surface and a main culture net cage 1a.2 fixed on the annular floating frame. In this embodiment, the annular floating frame is annular, and main aquaculture net case is cylindric.
The net cage counterweight sinks to the seabed, and the net cage counterweight is connected with the annular floating frame through the net cage anchor rope. The net cage counter weight of this embodiment is a plurality of, and every net cage counter weight links to each other through net cage anchor rope respectively with annular floating frame to fix main breeding device in a certain position of sea surface.
The inner culture device 1b is positioned in the main culture device. The internal culture device comprises a net cage floating frame 1b.1 and an internal culture net cage 1b.2 fixed on the net cage floating frame. The net cage floating frame floats on the water surface in the annular floating frame. In the embodiment, the net cage floating frame is annular, the inner cultivation net cage is cylindrical, and the upper end of the inner cultivation net cage is open. The meshes of the main aquaculture net cage are larger than those of the inner aquaculture net cage.
The net cage floating frame is connected with the annular floating frame through a floating frame connecting rope 1c, and in each inner culture device, the annular floating frames of any two adjacent inner culture devices are connected through a floating frame connecting rope. Therefore, the relative position between the inner culture devices is ensured to be stable.
After the seedling culture of the east-sea large yellow croaker is successful, the east-sea large yellow croaker is placed into an internal culture device for field domestication, the internal culture device is positioned in the main culture net cage, the water area environment in the internal culture device is stable, and the east-sea large yellow croaker is favorable for field domestication and survival of the east-sea large yellow croaker; after the east-sea large yellow croaker fries are domesticated in the internal breeding device for a period of time, the east-sea large yellow croaker fries are moved into the main breeding net cage for further field domestication, the water area environment in the main breeding net cage is closer to the environment of the external sea area, and after the east-sea large yellow croakers are domesticated in the internal breeding net cage and the main breeding net cage in the field, the east-sea large yellow croakers are released into the external sea area, so that the survival rate of the east-sea large yellow croaker fries released into the sea area can be effectively.
In a second embodiment, the remaining structure of the present embodiment refers to the first embodiment, and the difference therebetween is that:
as shown in fig. 2, 3 and 4, the open-air domestication system for releasing large yellow croakers in the east China sea further comprises a self-lifting tidal current flow blocking device 2 for falling tide. The self-lifting tidal current flow blocking device 2 for falling tide comprises a first connecting rope 2.1, a first flow blocking screen plate 2.3 positioned on the outer side of the main aquaculture net cage, a first floating frame 2.2 floating on the water surface, a first floating frame counterweight 2.5 sinking to the sea bottom and a first anchor rope 2.6 connecting the first floating frame and the first floating frame counterweight. The annular floating structure is provided with a first support 2.4 on the side facing the coast. The first bracket is positioned above the water surface. The first bracket is provided with a first guide ring 2.7. The first flow blocking net plate and the first support are positioned on the same side of the main aquaculture net cage, and the first floating frame and the first support are positioned on two opposite sides of the main aquaculture net cage.
One end of the first connecting rope is connected with the first floating frame. The other end of the first connecting rope passes through the first guide ring and is connected with the upper end of the first flow blocking screen plate. The upper end of the first flow blocking net plate is hung below the first guide ring through a first connecting rope. The first connecting rope is provided with a first upper limiting piece 2.8 and a first lower limiting piece 2.9, and the first lower limiting piece is positioned below the first guide ring.
As shown in fig. 2 and 3, when the first net baffle plate is suspended on the first guide ring through the first upper limiting member on the first connecting rope, the upper edge of the first net baffle plate is located below or close to the bottom surface of the main aquaculture net cage.
When the first lower limiting piece abuts against the first guide ring, the upper edge of the first flow blocking net plate is located above the water surface or below the water surface close to the water surface.
When the tide falls, when the tide flow rate is less than a set value V1, the first flow blocking screen plate sinks downwards under the action of the dead weight until the first upper limiting piece abuts against the first guide ring, and at the moment, the first flow blocking screen plate is hung on the first guide ring through the first upper limiting piece on the first connecting rope. When the tidal current flow rate is greater than a set value V1, the first floating frame overcomes the gravity of the first flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the first flow blocking screen plate to move upwards through the first connecting rope until the first lower limiting part abuts against the first guide ring.
The culture net cage is adopted to carry out field domestication on the east-sea large yellow croaker fry, although the releasing survival rate of the domesticated thickness east-sea large yellow croaker can be improved; however, the common culture net cage does not have the tidal current regulation capability, the requirement of field domestication of the east-sea large yellow croaker fries on the tidal current of the sea environment is higher, the tidal current cannot be too large or too small, the normal life of the east-sea large yellow croaker fries can be influenced by too large tidal current, and even the survival rate is influenced by the injury of the east-sea large yellow croaker fries; the small tidal current is not only not beneficial to the field domestication of the large yellow croaker fries in the east China sea, but also can cause the fry in the box to die due to oxygen deficiency; in order to solve the problem, the self-lifting tidal current flow blocking device for falling tide is arranged, and particularly,
when tide falls, when the tidal current flow rate is smaller than a set value V1, the upper edge of the first flow blocking screen plate is positioned below or close to the bottom surface of the main aquaculture net cage, so that the tidal current can smoothly flow through the main aquaculture net cage, and the problems that the field domestication effect is influenced due to too small tidal current, and even fry in the cage is dead due to oxygen deficiency are avoided; when the tidal current flow rate is greater than a set value V1, the first floating frame overcomes the gravity of the first flow-blocking screen plate under the action of tidal current, so that the first flow-blocking screen plate moves upwards, the upper edge of the first flow-blocking screen plate is close to the water surface, the tidal current is blocked by the first flow-blocking screen plate, and the tidal current flowing through the main aquaculture net cage is reduced, so that the problem that the normal life of the east-sea large yellow croaker fry is influenced due to overlarge tidal current flowing through the main aquaculture net cage, even the east-sea large croaker fry is injured, and the survival rate is influenced is solved; therefore, the device can automatically adjust according to the actual situation of the tidal current to avoid the problem that the field domestication effect is influenced by too large or too small tidal current and even the survival rate of the large yellow croaker fry is affected.
Further, as shown in fig. 5, the first spoiler panel 2.3 includes a first upper connecting plate 2.31, a first guiding hole 2.34 disposed on the first upper connecting plate, a first guiding rod 2.35 slidably disposed in the first guiding hole, a first fixing panel 2.32 and a first floating panel 2.33 disposed below the first upper connecting plate, a first spoiler panel 2.39 disposed below the first floating panel, a first limiting plate 2.36 disposed at an upper end of the first guiding rod, a first limiting block 2.37 disposed on the first guiding rod and disposed between the first upper connecting plate and the first limiting plate, and a first compression spring 2.38 disposed between the first upper connecting plate and the first limiting plate. In this embodiment, there are two first guide holes, and the first guide rods correspond to the first guide holes one to one. The upper end of the first fixing screen plate is fixed on the first upper connecting plate. The first floating screen plate, the first fixed screen plate and the first guide rod are parallel to each other. The upper end of the first floating net plate is connected with the lower end of the first guide rod. The first compression spring is used for driving the first guide rod to move upwards until the upper end of the first fixing screen plate abuts against the first upper connecting plate. The first spoiler is perpendicular to the first guide rod and is connected with the first floating screen plate through a connecting piece. The other end of the first connecting rope 2.1 is connected with a first upper connecting plate of the first flow blocking net plate. When the upper end of the first fixed screen plate is abutted against the first upper connecting plate, the meshes of the first floating screen plate are distributed opposite to the meshes of the first fixed screen plate.
When tide falls, when the tidal current flow rate is greater than a set value V2, the acting force of the tidal current acting on the first spoiler overcomes the acting force of the first compression spring, so that the first floating screen plate moves axially along the first guide hole until the first limiting block abuts against the first upper connecting plate, and at the moment, the meshes of the first floating screen plate and the meshes of the first fixed screen plate are distributed in a staggered manner; the set value V2 is greater than the set value V1.
Therefore, when tide flows at a speed greater than a set value V2, the set value V2 is greater than a set value V1, the acting force of the tide acting on the first spoiler overcomes the acting force of the first compression spring, and meshes of the first floating mesh plate and meshes of the first fixed mesh plate are distributed in a staggered manner, so that the resistance of the first flow blocking mesh plate is further increased, the tide flowing through the main aquaculture mesh box is further reduced, the problem that the normal life of the large yellow croaker fry in the east sea is influenced due to the fact that the large yellow croaker fry in the east sea is injured even is avoided, and the survival rate is influenced is solved.
Of course, the first baffle plate of the present embodiment may also be formed by one plate.
Further, as shown in fig. 2, the cross section of the first flow-resisting net plate is arc-shaped, and the axis of the first flow-resisting net plate and the main aquaculture net cage are located on the same side of the first flow-resisting net plate; specifically, the cross sections of the first fixing net plate and the first floating net plate are arc-shaped, and the axis of the first fixing net plate and the main aquaculture net cage are located on the same side of the first flow blocking net plate.
Further, as shown in fig. 2, 3 and 4, the open-air domestication system for releasing large yellow croakers in the east China sea further comprises a self-lifting tidal current flow blocking device 3 for rising tide. The self-lifting tidal current flow blocking device for flood tide comprises a second connecting rope 3.1, a second flow blocking screen plate 3.3 positioned on the outer side of the main aquaculture net box, a second floating frame 3.2 floating on the water surface, a second floating frame counterweight 3.5 sinking to the sea bottom and a second anchor rope 3.6 connecting the second floating frame and the second floating frame counterweight. One side of the annular floating frame is provided with a second bracket 3.4. The second support and the first support are located on two opposite sides of the annular floating frame, the second support is located above the water surface, and a second guide ring is arranged on the second support. The second flow blocking net plate and the second bracket are positioned at the same side of the main aquaculture net cage. The second floating frame and the second bracket are positioned at two opposite sides of the main aquaculture net cage. The one end that the rope was connected to the second floats the frame with the second and is connected, and the other end that the rope was connected to the second passes the second guide ring and is connected with the upper end of second choked flow otter board. The upper end of the second flow blocking net plate is hung below the second guide ring through a second connecting rope. The second connecting rope is provided with a second upper limiting piece and a second lower limiting piece, and the second lower limiting piece is positioned below the second guide ring.
When the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope, the upper edge of the second flow-resisting net plate is positioned below the bottom surface of the main aquaculture net cage or close to the bottom surface of the main aquaculture net cage. When the second lower limiting piece abuts against the second guide ring, the upper edge of the second flow blocking net plate is close to the water surface.
When tide rises and the tidal current flow rate is smaller than a set value V1, the second flow-resisting net plate sinks downwards under the action of self weight until the second upper limiting piece abuts against the second guide ring, and at the moment, the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope. When the tidal current flow rate is larger than a set value V1, the second floating frame overcomes the gravity of the second flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the second flow blocking screen plate to move upwards through the second connecting rope until the second lower limiting piece abuts against the second guide ring.
Therefore, when tidal current flow rate is smaller than a set value V1 during tidal current rise, the upper edge of the second flow blocking screen plate is positioned below or close to the bottom surface of the main aquaculture net cage, so that tidal current can smoothly flow through the main aquaculture net cage, and the problems that the outdoor domestication effect is influenced due to too small tidal current and even fry in the cage are dead due to oxygen deficiency are avoided; when the tidal current flow rate is larger than a set value V1, the second floating frame overcomes the gravity of the second flow-blocking screen plate under the action of the tidal current, so that the second flow-blocking screen plate moves upwards, the upper edge of the second flow-blocking screen plate is close to the water surface, the tidal current is blocked by the second flow-blocking screen plate, the tidal current flowing through the main aquaculture net cage is reduced, the problem that the normal life of the east-sea large yellow croaker fry is influenced due to the overlarge tidal current flowing through the main aquaculture net cage is avoided, and even the east-sea large yellow croaker fry is injured, so that the survival rate is influenced.
Furthermore, the second flow blocking screen plate comprises a second upper connecting plate, a second guide hole arranged on the second upper connecting plate, a second guide rod arranged in the second guide hole in a sliding manner, a second fixed screen plate and a second floating screen plate which are positioned below the second upper connecting plate, a second flow blocking plate positioned below the second floating screen plate, a second limiting plate arranged at the upper end of the second guide rod, a second limiting block arranged on the second guide rod and positioned between the second upper connecting plate and the second limiting plate, and a second compression spring positioned between the second upper connecting plate and the second limiting plate. The upper end of the second fixed screen plate is fixed on the second upper connecting plate. The second floating net plate, the second fixed net plate and the second guide rod are parallel to each other. The upper end of the second floating net plate is connected with the lower end of the second guide rod. The second compression spring is used for driving the second guide rod to move upwards until the upper end of the second fixed screen plate abuts against the second upper connecting plate. The second spoiler is perpendicular to the second guide rod and is connected with the second floating screen plate through a connecting piece. The other end of the second connecting rope is connected with a second upper connecting plate of the second flow blocking net plate. When the upper end of the second fixed screen plate is abutted against the second upper connecting plate, the meshes of the second floating screen plate are opposite to the meshes of the second fixed screen plate. The specific structure of the second screen plate of the present embodiment refers to the first screen plate in fig. 5.
When tide rises and the tidal current flow rate is greater than a set value V2, the acting force of the tidal current acting on the second spoiler overcomes the acting force of the second compression spring, so that the second floating screen plate axially moves along the second guide hole until the second limiting block abuts against the second upper connecting plate, and at the moment, the meshes of the second floating screen plate and the meshes of the second fixed screen plate are distributed in a staggered manner; the set value V2 is greater than the set value V1.
Therefore, when tidal current is greater than a set value V2, the set value V2 is greater than a set value V1, the acting force of the tidal current acting on the second spoiler overcomes the acting force of the second compression spring, and meshes of the second floating mesh plate and meshes of the second fixed mesh plate are distributed in a staggered manner, so that the flow resistance of the second mesh plate is further increased, the tidal current flowing through the main aquaculture net cage is further reduced, the situation that the normal life of the east-sea pseudosciaena crocea fry is influenced due to the fact that the tidal current flowing through the main aquaculture net cage is too large is avoided, and the situation that the survival rate of the east-sea pseudosciaena crocea fry is influenced is even caused.
Of course, the second baffle plate of the present embodiment may also be formed by one plate.
Furthermore, the cross section of the second flow-resisting net plate is arc-shaped, and the axis of the second flow-resisting net plate and the main aquaculture net cage are positioned on the same side of the second flow-resisting net plate; specifically, the cross sections of the second fixed net plate and the second floating net plate are both arc-shaped, and the axis of the second fixed net plate and the main aquaculture net cage are positioned on the same side of the second flow blocking net plate.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. A open-air system of domesticating of east sea large yellow croaker releasing is characterized by, includes:
the main breeding device comprises an annular floating frame floating on the water surface and a main breeding net cage fixed on the annular floating frame, and the upper end of the main breeding net cage is opened;
the net cage counterweight sinks to the seabed and is connected with the annular floating frame through a net cage anchor rope;
the internal culture devices comprise net cage floating frames and internal culture net cages fixed on the net cage floating frames, and the net cage floating frames float on the water surface in the annular floating frames.
2. The open-air domestication system of east China sea large yellow croaker stocking in the released field according to claim 1, wherein the meshes of the main aquaculture net cage are larger than the meshes of the inner aquaculture net cage.
3. The open-air farming system for discharging large yellow croaker in the east China sea according to claim 1, wherein the floating net cages and the floating ring frames are connected by floating frame connecting ropes, and the floating ring frames of any two adjacent internal culture devices in each internal culture device are connected by floating frame connecting ropes.
4. The open-air domestication system of large yellow croaker in east China sea according to claim 1, 2 or 3, further comprising a self-elevating tide current blocking device for falling tide, the self-elevating tide current blocking device for falling tide comprising a first connecting rope, a first current blocking screen plate located outside the main aquaculture net cage, a first floating frame floating on the water surface, a first floating frame counterweight sinking to the sea bottom and a first anchor rope connecting the first floating frame and the first floating frame counterweight, wherein the annular floating frame is provided with a first bracket on one side facing the coast, the first bracket is located above the water surface, the first bracket is provided with a first guide ring, the first current blocking screen plate and the first bracket are located on the main aquaculture net cage, the first floating frame and the first bracket are located on the opposite sides of the same side of the main aquaculture net cage, one end of the first connecting rope is connected with the first floating frame, and the other end of the first connecting rope passes through the first guide ring and is connected with the upper end of the first current blocking screen plate, the upper end of the first flow blocking screen plate is hung below the first guide ring through a first connecting rope, the first connecting rope is provided with a first upper limiting piece and a first lower limiting piece, the first lower limiting piece is positioned below the first guide ring,
when the first flow-resisting net plate is hung on the first guide ring through the first upper limiting piece on the first connecting rope, the upper edge of the first flow-resisting net plate is positioned below the bottom surface of the main aquaculture net cage or close to the bottom surface of the main aquaculture net cage; when the first lower limiting piece abuts against the first guide ring, the upper edge of the first flow blocking net plate is close to the water surface;
when tide falls, when the tidal current flow rate is smaller than a set value V1, the first flow blocking screen plate sinks downwards under the action of self weight until the first upper limiting piece abuts against the first guide ring, and at the moment, the first flow blocking screen plate is hung on the first guide ring through the first upper limiting piece on the first connecting rope;
when the tidal current flow rate is larger than a set value V1, the first floating frame overcomes the gravity of the first flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the first flow blocking screen plate to move upwards through the first connecting rope until the first lower limiting part abuts against the first guide ring.
5. The open-air fish-farming system according to claim 1, wherein the first net plate for blocking flow comprises a first upper connecting plate, a first guiding hole disposed on the first upper connecting plate, a first guiding rod slidably disposed in the first guiding hole, a first net plate and a first floating net plate disposed under the first upper connecting plate, a first baffle plate disposed under the first floating net plate, a first limiting plate disposed at an upper end of the first guiding rod, a first limiting block disposed on the first guiding rod and disposed between the first upper connecting plate and the first limiting plate, and a first compression spring disposed between the first upper connecting plate and the first limiting plate, wherein an upper end of the first net plate is fixed on the first upper connecting plate, the first floating net plate, the first net plate and the first guiding rod are parallel to each other, and an upper end of the first floating net plate is connected with a lower end of the first guiding rod, the first compression spring is used for driving the first guide rod to move upwards until the upper end of the first fixed screen plate abuts against the first upper connecting plate, the first spoiler is perpendicular to the first guide rod and is connected with the first floating screen plate through a connecting piece, and the other end of the first connecting rope is connected with the first upper connecting plate for blocking the flow of the first screen plate;
when the upper end of the first floating screen plate is abutted against the first upper connecting plate, the meshes of the first floating screen plate are distributed opposite to the meshes of the first fixed screen plate;
when tide falls, when the tidal current flow rate is greater than a set value V2, the acting force of the tidal current acting on the first spoiler overcomes the acting force of the first compression spring, so that the first floating screen plate moves axially along the first guide hole until the first limiting block abuts against the first upper connecting plate, and at the moment, the meshes of the first floating screen plate and the meshes of the first fixed screen plate are distributed in a staggered manner; the set value V2 is greater than the set value V1.
6. The open-air domestication system of east China sea large yellow croaker releasing according to claim 4, wherein the annular floating frame is circular, the main aquaculture net cage is cylindrical, the cross section of the first flow-resisting net plate is circular arc-shaped, and the axis of the first flow-resisting net plate and the main aquaculture net cage are positioned on the same side of the first flow-resisting net plate.
7. The open-air domestication system of east China sea large yellow croaker releasing according to claim 5, wherein the annular floating frame is circular, the main aquaculture net cage is cylindrical, the cross sections of the first net fixing plate and the first floating net fixing plate are circular, and the axis of the first net fixing plate and the main aquaculture net cage are positioned on the same side of the first net blocking plate.
8. The open-air domestication system of the east-sea large yellow croaker according to claim 1, 2 or 3, further comprising a self-elevating tide current blocking device for tide elevation, wherein the self-elevating tide current blocking device for tide elevation comprises a second connecting rope, a second current blocking screen plate positioned outside the main aquaculture net cage, a second floating frame floating on the water surface, a second floating frame counterweight sinking to the sea bottom and a second anchor rope connecting the second floating frame and the second floating frame counterweight, one side of the annular floating frame is provided with a second bracket, the second bracket and the first bracket are positioned at two opposite sides of the annular floating frame, the second bracket is positioned above the water surface, the second current blocking screen plate and the second bracket are positioned at the same side of the main aquaculture net cage, the second floating frame and the second bracket are positioned at two opposite sides of the main aquaculture net cage, and one end of the second connecting rope is connected with the second floating frame, the other end of the second connecting rope passes through the second guide ring and is connected with the upper end of the second flow-resisting net plate, the upper end of the second flow-resisting net plate is hung below the second guide ring through the second connecting rope, the second connecting rope is provided with a second upper limiting piece and a second lower limiting piece, the second lower limiting piece is positioned below the second guide ring,
when the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope, the upper edge of the second flow-resisting net plate is positioned below the bottom surface of the main aquaculture net cage or close to the bottom surface of the main aquaculture net cage; when the second lower limiting piece abuts against the second guide ring, the upper edge of the second flow blocking screen plate is close to the water surface;
when tide rises and the tidal current flow rate is less than a set value V1, the second flow-resisting net plate sinks downwards under the action of self weight until the second upper limiting piece abuts against the second guide ring, and at the moment, the second flow-resisting net plate is hung on the second guide ring through the second upper limiting piece on the second connecting rope;
when the tidal current flow rate is larger than a set value V1, the second floating frame overcomes the gravity of the second flow blocking screen plate under the action of the tidal current, moves to the open sea along the tidal current, and drives the second flow blocking screen plate to move upwards through the second connecting rope until the second lower limiting piece abuts against the second guide ring.
9. The open-air domestication system of east China sea large yellow croaker stocking in the field of claim 1, 2 or 3, wherein the upper end of the internal aquaculture net cage is open.
10. The open-air domestication system of east China sea large yellow croaker stocking in the released field according to claim 1, 2 or 3, wherein the annular floating frame is circular, the main aquaculture net cage is cylindrical, the net cage floating frame is circular, and the inner aquaculture net cage is cylindrical.
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