CN114304085B - Environment-friendly continuous fishing type euphausia superba trawl - Google Patents
Environment-friendly continuous fishing type euphausia superba trawl Download PDFInfo
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- CN114304085B CN114304085B CN202111650115.1A CN202111650115A CN114304085B CN 114304085 B CN114304085 B CN 114304085B CN 202111650115 A CN202111650115 A CN 202111650115A CN 114304085 B CN114304085 B CN 114304085B
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Abstract
The invention discloses an environment-friendly continuous fishing type euphausia superba trawl net, which relates to the technical field of marine fishing and comprises a ship body and a towing assembly, wherein two sides of the rear part of the ship body are respectively and symmetrically connected with one end of a first rope body, and the other end of the first rope body is respectively connected with two ends of the towing assembly; the towing assembly comprises a towing net, the towing net comprises a towing net opening rope, floating ball base bodies are arranged on the towing net opening rope at intervals, the bottoms of the floating ball base bodies are connected with the towing net opening rope through circular hooks, a tensioning sleeve is arranged on the rear side of the towing net, and an explosion-proof net is connected to the rear side of the tensioning sleeve; one end of a first pipe body is connected to the tensioning sleeve, and the first pipe body is connected with a fish suction pump on the ship body; a floating ball shell is arranged between every two floating ball matrixes in the opposite direction, and a first adjusting plate, a second adjusting plate and a third adjusting plate are sequentially arranged between the floating ball shells from top to bottom. The problems that continuous fishing cannot be performed, fishing efficiency is low, selective fishing cannot be performed, various environments cannot be adapted to, and marine environment maintenance is not facilitated are solved.
Description
Technical Field
The invention belongs to the technical field of marine fishing, and particularly relates to an environment-friendly continuous fishing type euphausia superba trawl.
Background
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
The antarctic krill is rich in resources, is distributed in the Antarctic oceanic area, has the resource storage amount of 6.5-10 hundred million tons, and is one of key species in the antarctic marine ecosystem. Since the commercial development of euphausia superba resources in the 80 th of the 20 th century, trawl fishing operation is mainly used. Due to the special geographical position and the working environment of the euphausia superba fishing ground, the euphausia superba trawling is mainly single-ship trawling. The trawl drags the fishing gear to move forward in the sea bottom or seawater by utilizing the movement of the ship, and forces the fishing gear to enter the net bag through fishing objects such as fishes, shrimps and crabs in the water area, thereby achieving the aim of fishing. Therefore, the trawl net and the net plate are main tools for the fishing operation of the Antarctic krill, wherein the trawl net is the most direct production tool for the fishing of the Antarctic krill.
The prior art is disclosed in publication No. CN 103988816A, which is named as a Euphausia superba trawl net, and the netting, meshes and shapes of the net sleeves, the body net and the sac net are designed, and the back net, the abdominal net and the net nets on two sides are sewn by using net sheets. The invention simplifies the net processing technology, saves labor cost and improves processing and manufacturing efficiency; the structure of the net of the trawl net is changed, the net material is reduced, the water filtering performance of the net is improved, and the resistance of the net is reduced; the structure of the net is optimized, the operation process of pulling and releasing the net is shortened, the using efficiency of the net is improved, and the fishing efficiency of the euphausia superba is improved.
It should be noted that the above background description is provided only for the sake of clarity and complete description of the technical solutions of the present application, and for the sake of understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.
Disclosure of Invention
The invention aims to provide an environment-friendly continuous fishing type euphausia superba trawl, which can realize continuous fishing, has high fishing efficiency and selectivity, is suitable for various environments and is beneficial to the maintenance of marine environment.
The technical scheme adopted by the invention for realizing the purpose is as follows:
an environment-friendly continuous fishing type euphausia superba trawl, comprising:
the two sides of the rear of the ship body are respectively and symmetrically connected with one end of a first rope body, and the other end of the first rope body is respectively connected with two ends of a dragging assembly.
The towing assembly comprises a towing net, the towing net is funnel-shaped, the towing net comprises a towing net opening rope, floating ball base bodies are arranged on the towing net opening rope at intervals, hooks of circular rings are connected with the towing net opening rope at the bottoms of the floating ball base bodies, a tensioning sleeve is arranged on the rear side of the towing net, and an explosion-proof net is connected to the rear side of the tensioning sleeve. In the process that the ship body moves forwards, the dragging component is dragged by the first rope body, and the dragging component opens a net mouth of the trawl net under the actions of the first rope body, the floating ball and the water flow to be collected into the trawl net; when the catch is too much, the tensioning sleeve can be expanded, and part of the catch enters the explosion-proof net.
According to the invention, through the design of the towing assembly, excessive catch objects can be captured to burst the tension of the tension sleeve under the action of pressure in the fishing process, so that the tension sleeve enters the explosion-proof net through diameter expansion, the economic loss caused by the burst of the front trawl is avoided, and the design can reduce the probability that the catch objects at the tail part are extruded and die due to excessive pressure while the tail part pressure of the trawl is reduced; meanwhile, by designing the towing assembly, the towing assembly can be used in the process of collecting the towing assembly, collective death caused by over-crowded catches at the bottom of the trawl and over-high pressure is prevented, the survival probability of the catches is increased, the freshness of the catches is improved, and the subsequent treatment and processing of the catches are facilitated.
The tensioning sleeve is connected with one end of a first pipe body, and the first pipe body is connected with a fish suction pump on the ship body. The fish suction pump can suck the catch in the tensioning sleeve through the first pipe body and suck the catch onto the ship body.
Compared with the prior art, the continuous fishing device has the advantages that through the design of the first pipe body, continuous fishing operation can be achieved, repeated net unloading and net collecting are not needed, and the capturing efficiency is improved; meanwhile, the accumulation amount of the catches at the tail of the trawl can be observed through the suction amount of the first pipe body, namely the amount of the catches sucked by the fish suction pump is used for judging, so that the net explosion can be avoided; meanwhile, the amount of the fish catch objects sucked by the fish suction pump can be adjusted, the power of the fish suction pump can be adjusted, and low gears can be used when fewer fish catch objects are caught, so that the consumption of catching ship energy sources is reduced, the catching amount of unit energy sources is increased, and long-time sea catching can be realized.
A floating ball shell is arranged between every two floating ball matrixes in the opposite direction, the floating ball shell wraps half of the floating ball matrixes, and a first adjusting plate, a second adjusting plate and a third adjusting plate are sequentially arranged between the floating ball shells from top to bottom. When the trawl assembly is dragged through first rope body by the hull, first regulating plate, second regulating plate and third regulating plate can form a power to the trawl net gape outside under the impact of rivers, can open the trawl net gape.
By designing the floating ball base body, the trawl door can be kept in an open state all the time, the catching rate of the trawl to the catch is kept at a high level as much as possible, and the catching efficiency of the invention is improved; when the turbulence or ocean currents in other directions interfere, the first adjusting plate, the second adjusting plate and the third adjusting plate can be adjusted to always keep the net mouth in an open state.
The tensioning sleeve is a net sleeve formed by arranging high-elasticity rope bodies. When the catch is too much, the tensioning sleeve can be elastically expanded, and part of the catch can enter the explosion-proof net.
According to the invention, through the design of the tensioning sleeve, the tensioning sleeve and the first pipe body can be mutually matched, so that excessive catch objects can be captured to suddenly break the tensioning of the tensioning sleeve under the action of pressure in the fishing process, the tensioning sleeve enters the anti-explosion net through diameter expansion, and economic loss caused by the explosion of the front trawl is avoided; meanwhile, collective death caused by over-crowded catches at the bottom of the trawl and over-high pressure can be prevented, the survival probability of the catches is increased, the freshness of the catches is improved, and the follow-up treatment and processing of the catches are facilitated.
According to an embodiment of the invention, the first adjusting plate, the second adjusting plate and the third adjusting plate are all bent towards the direction of the trawl door rope, and the bending amplitudes of the first adjusting plate, the second adjusting plate and the third adjusting plate are increased in sequence.
According to the invention, through the design of the first adjusting plate, the second adjusting plate and the third adjusting plate, acting forces generated by interaction of the first adjusting plate, the second adjusting plate and the third adjusting plate with water flow are different, and under the action of each adjusting plate, a larger force can be generated to move the floating ball base body connected with the adjusting plate to the direction far away from a trawl mouth rope, so that the trawl mouth can be expanded, the trawling effect of a trawling assembly can be ensured, more fish catches can be captured in unit time, and the overall efficiency can be improved; meanwhile, the design of each adjusting plate is favorable for reducing the influence of turbulent water flow on the adjusting plate, and each adjusting plate can open the net mouth of the trawl net in the turbulent and turbulent water flow in time, so that the application range and the environment of the invention are improved; the water flow near the net mouth of the trawl is adjusted through the designed adjusting plate to guide the water flow to play a certain adjusting and controlling role on the trawl at the rear side, so that the trawl at the rear side is prevented from being influenced by the fact that fish school organisms and the like in the trawl drive the trawl at the rear side to move upwards; and under the action of each adjusting plate, the position height of the whole trawl in water can be adjusted, which is beneficial to accurately fishing specific catches, and meanwhile, the height of the dragging assembly can be adjusted in time when the trawl meets reef or shoals, which is beneficial to preventing the dragging assembly from being scratched to cause damage.
According to one embodiment of the invention, towing component assemblies are symmetrically arranged on two sides of the trawl and are connected with the trawl opening rope and the first rope body, each towing component assembly comprises a plurality of flexible plates which are arranged in parallel, and the upper sections and the lower sections of the flexible plates are connected through flexible connecting meshes. In the process of fishing operation, the flexible plate plays a role in guiding nearby water flow so as to keep two ends of the side surface of the trawl net open in the dragging process.
According to an embodiment of the present invention, a flow guide strip is disposed in the middle of the flexible board, a first opening and a second opening are disposed on two sides of the flow guide strip, a first board body is disposed in the first opening, the first board body can swing relatively, and a plurality of flow guide plates are disposed in the second opening.
According to the invention, through the design of the towing component, the opening of the trawl can be kept in an open state, and meanwhile, the flexible plate generates a certain amount of bending in the towing process of the trawl to play a role in guiding nearby water flow so that the water flow flows along the direction of the trawl; and the flexible plate has and parallels the polylith, can not lead to whole to lose efficacy so that the net gape is closed because of single flexible plate damages, sets up like this and can improve the stability of whole device.
According to one embodiment of the invention, a bird frightening rope is arranged behind the ship body and comprises a second rope body, the second rope body is connected with the ship body and the tensioning sleeve, and color flags are arranged on the second rope body at intervals; the color of the colored flag is gradually changed along the second rope body.
The bird frightening rope is arranged, so that birds approaching to a ship can be repelled, and the birds are prevented from being wound on the trawl net to cause damage when catching fishes; meanwhile, the colored flag is arranged on the bird frightening rope, so that the height of the trawl at the bottom in the water can be preliminarily judged through the position of the colored flag in the water, and the trawl can be favorably adjusted in the position in the water to catch specific catch.
According to one embodiment of the invention, a reinforcing plate is arranged above the tensioning sleeve, a through hole is formed in the reinforcing plate, and the reinforcing plate is attached to the tensioning sleeve.
Through the design to the reinforcing plate, can consolidate being connected of first body and tensioning sleeve, can make the tensioning sleeve receive the plate body restriction to have certain opening, be convenient for some catch through, the tensioning sleeve is expanded gradually under receiving great pressure effect, is favorable to making some catch with higher speed to enter into in the first body.
According to one embodiment of the invention, a flexible isolation assembly is arranged near the tail of the trawl and comprises a flexible isolation net which vertically divides the trawl into two parts along the fish feeding direction, the middle part of the flexible isolation net is connected with one end of a screen, and the other end of the screen is connected with one side of the trawl in the fish feeding direction; an escape area is arranged between the screen mesh and the flexible isolation mesh. The smaller catch can pass through the screen on the upper part of the flexible isolation component and escape; the larger catch passes through a flexible spacer net. Through the design of the flexible isolation assembly, the young fish catch can return to the ocean again, and the environment protection and the resource protection are facilitated.
According to one embodiment of the invention, one side of the flexible separation net, which is far away from the escape area, comprises two third rope bodies which are arranged adjacently, the two adjacent third rope bodies are connected through a spring in a dragging mode, and a corrugated pipe is arranged outside the third rope bodies. This avoids scratching of the catch and provides a spring force to freely control the spacing between the flexible insulation members to avoid breakage and sifting of the catch.
According to one embodiment of the invention, the front section meshes of the trawl are hexagonal, and the rear section meshes of the trawl are rhombic.
By arranging the hexagonal meshes at the front section of the trawl, part of the catch can be leaked out in the fishing process at the front section of the trawl, so that part of food is provided for seabirds, and the maintenance of marine environment is facilitated; meanwhile, in the fishing process, when the trawl is dragged forwards, meshes at the front section of the trawl are slowly contracted, and when seabirds fall into the trawl carelessly, enough time can be provided for escaping, so that the phenomenon that the seabirds die due to winding is favorably prevented.
Compared with the prior art, the invention has the beneficial effects that: (1) Through the design of the first pipe body, continuous fishing operation can be achieved, repeated net unloading and net collecting are not needed, and the capturing efficiency is improved; (2) Through the design of the floating ball base body and the dragging piece assembly, the net port is always in an open state in the dragging and advancing process of the dragging assembly, and meanwhile, the net port can be kept in the open state in an extreme environment; (3) Through the design to the trawl mesh, through being the hexagon with the anterior segment mesh of trawl, the trawl back end mesh is the rhombus for the trawl anterior segment can spill partial fishing thing at the in-process of fishing, provides partial food for the seabird, and trawl anterior segment mesh shrink is slower simultaneously, falls into the net when the seabird carelessly and can have sufficient time to flee, is favorable to preventing to cause the dead phenomenon of seabird to take place because of the winding.
Drawings
Fig. 1 is an overall schematic diagram of an environmentally-friendly euphausia superba trawl;
FIG. 2 is a schematic view of a portion of a floating ball base;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a front view of a floating ball base;
FIG. 5 is a right side view of the first adjustment plate, the second adjustment plate, and the third adjustment plate;
FIG. 6 is a schematic view of a trailing component assembly;
FIG. 7 is a schematic view of a flexible sheet;
FIG. 8 is a schematic view of a tension sleeve and an explosion-proof mesh;
FIG. 9 is a schematic view of a stiffener;
FIG. 10 is a schematic view of a flexible insulation assembly;
fig. 11 is a schematic view of a side of the flexible isolation net away from the escape area;
FIG. 12 is a schematic cross-sectional view of a bellows;
figure 13 is a schematic view of a trawl, a tensioning sleeve and an explosion proof mesh.
Reference numbers: the ship comprises a ship body 100, a first rope body 101, a first pipe body 102, a towing assembly 200, a towing net 210, a towing net opening rope 220, a floating ball base body 230, a hook 231, a floating ball shell 232, a first adjusting plate 233, a second adjusting plate 234, a third adjusting plate 235, a towing piece assembly 240, a flexible connecting net 241, a flexible plate 250, a flow guide strip 251, a first plate body 252, a flow guide plate 253, a flexible isolation assembly 260, a flexible isolation net 261, a screen 262, a third rope body 263, a spring 264, a corrugated pipe 265, a tensioning sleeve 300, a reinforcing plate 310, an explosion-proof net 400, a bird frightening rope 500, a second rope body 510 and a color flag 520.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
an environment-friendly continuous fishing type euphausia superba trawl, comprising:
as shown in fig. 1, in the hull 100, one ends of first ropes 101 are symmetrically connected to both sides of the rear of the hull 100, and the other ends of the first ropes 101 are connected to both ends of a towing assembly 200.
As shown in fig. 1, the trawl assembly 200 includes a trawl 210, the trawl 210 is funnel-shaped, the trawl 210 includes a trawl mouth rope 220, floating ball base bodies 230 are arranged on the trawl mouth rope 220 at intervals, the bottoms of the floating ball base bodies 230 are connected with the trawl mouth rope 220 through circular hooks 231, a tensioning sleeve 300 is arranged at the rear side of the trawl 210, and an explosion-proof net 400 is connected to the rear side of the tensioning sleeve 300. In the process that the ship body 100 moves forwards, the towing assembly 200 is dragged by the first rope 101, and the towing assembly opens the net mouth of the trawl 210 under the action of the first rope 101, the floating ball and the water flow to be collected into the trawl 210; when there is too much fish, the tension sleeve 300 may expand, which may draw some fish into the anti-explosion mesh 400.
According to the invention, through the design of the towing assembly 200, excessive catch can break through the tension of the tension sleeve 300 under the action of pressure in the fishing process, so that the tension sleeve 300 enters the anti-explosion net 400 through diameter expansion, the economic loss caused by explosion of the front trawl 210 is avoided, and the design can reduce the tail pressure of the trawl 210 and simultaneously reduce the death probability of the tail catch due to excessive extrusion under the condition of excessive pressure; meanwhile, by designing the towing assembly 200, the phenomenon that the fisheries at the bottom of the trawl 210 die collectively due to overcrowding and overlarge pressure can be prevented in the process of collecting the towing assembly 200, the survival probability of the fisheries is increased, the freshness of the fisheries is improved, and the processing of the fisheries are facilitated subsequently.
As shown in fig. 1 and 8, one end of the first pipe 102 is connected to the tension sleeve 300, and the first pipe 102 is connected to a fish pump of the hull 100. The fish pump will suck the fish catch in the tension sleeve 300 through the first pipe 102 and onto the hull 100.
Compared with the prior art, the continuous fishing device can achieve continuous fishing operation through the design of the first pipe body 102, does not need to repeatedly carry out net dropping and net collecting, and improves the capturing efficiency; meanwhile, the amount of the accumulated catch at the tail part of the trawl 210 can be observed through the amount of the first pipe body 102, namely, the amount of the catch sucked by the fish suction pump is judged, so that the net explosion can be avoided; meanwhile, the amount of the fish catch objects sucked by the fish suction pump can be adjusted, the power of the fish suction pump can be adjusted, and low gears can be used when fewer fish catch objects are caught, so that the consumption of catching ship energy sources is reduced, the catching amount of unit energy sources is increased, and long-time sea catching can be realized.
As shown in fig. 2, 3 and 4, a floating ball shell 232 is disposed between every two floating ball bases 230 in the opposite direction, the floating ball shell 232 wraps half of the floating ball bases 230, and a first adjusting plate 233, a second adjusting plate 234 and a third adjusting plate 235 are sequentially disposed between the floating ball shells 232 from top to bottom. When the trawl 210 assembly is dragged by the hull 100 through the first rope 101, the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate 235 generate a force to the outside of the trawl door rope 220 under the impact of the water flow, and the trawl door 210 is opened.
By the design of the floating ball base body 230, the net opening of the trawl 210 can be kept in an open state all the time, the fishing rate of the trawl 210 to the fishery catch can be kept at a high level as much as possible, and the fishing efficiency of the invention is improved; when turbulence or ocean current in other directions interfere, the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate can be adjusted to always keep the net mouth open, which is beneficial to fishing operation in extreme environment, expands the application range and area of the trawl 210, and can be used in different areas.
As shown in fig. 1 and 8, the tension sleeve 300 is a net sleeve with high elastic rope bodies. When there is too much fish, the tension sleeve 300 can expand elastically, and part of the fish enters the anti-explosion net 400.
According to the invention, through the design of the tensioning sleeve 300, the tensioning sleeve 300 and the first pipe body 102 can be matched with each other, so that excessive catch can break through the tensioning of the tensioning sleeve 300 under the action of pressure in the fishing process, the tensioning sleeve 300 can enter the anti-explosion net 400 through diameter expansion, and the economic loss caused by the burst of the front trawl 210 is avoided; meanwhile, collective death caused by over crowding and over pressure of the catch at the bottom of the trawl 210 can be prevented, the survival probability of the catch is increased, the freshness of the catch is improved, and the subsequent treatment and processing of the catch are facilitated.
As shown in fig. 2, 3, 4 and 5, the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate 235 are all bent toward the trawl door rope 220, and the bending ranges of the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate 235 are sequentially increased.
According to the invention, through the design of the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate 235, the acting forces generated by the interaction of the first adjusting plate 233, the second adjusting plate 234 and the third adjusting plate 235 with water flow are different, and under the action of each adjusting plate, a larger force is generated to move the floating ball base body 230 connected with the adjusting plate in the direction away from the trawl mouth rope 220, so that the net mouth of the trawl 210 can be enlarged, the trawling effect of the trawling assembly 200 can be ensured, more fish catches can be captured in unit time, and the overall efficiency can be improved; meanwhile, the design of each adjusting plate is favorable for reducing the influence of turbulent water flow on the adjusting plate, and each adjusting plate can open the net opening of the trawl 210 in turbulent and turbulent water flow in time, so that the application range and the environment of the invention are improved; the water flow near the net mouth of the trawl 210 is adjusted through the designed adjusting plate to guide the water flow to play a certain adjusting and controlling role on the trawl 210 at the rear side, so that the trawl 210 at the rear side is prevented from being influenced by the fact that fish school organisms and the like in the trawl 210 move upwards to drag; and under the effect of each adjusting plate, the position height of the whole trawl 210 in water can be adjusted, which is beneficial to accurately catching specific catches, and meanwhile, when encountering reefs or shoals, the height of the towing assembly 200 can be adjusted in time, which is beneficial to preventing the towing assembly 200 from being scratched to cause damage.
As shown in fig. 1, 6 and 7, tow component assemblies 240 are symmetrically arranged on two sides of the trawl 210, the tow component assemblies 240 connect the trawl mouth rope 220 with the first rope 101, the tow component assemblies 240 comprise a plurality of flexible plates 250 which are arranged in parallel, and the upper and lower sections of the flexible plates 250 are connected through a flexible connecting net 241. During the fishing operation, the flexible panels 250 direct the flow of water nearby to keep the sides of the trawl 210 open during towing.
As shown in fig. 6 and 7, a flow guide strip 251 is disposed in the middle of the flexible board 250, a first opening and a second opening are disposed on two sides of the flow guide strip 251, a first board 252 is disposed in the first opening, the first board 252 can swing relatively, and a plurality of flow guide plates 253 are disposed in the second opening.
According to the invention, through the design of the trawl part assembly 240, the opening of the trawl 210 can be kept in an open state, and meanwhile, the flexible plate 250 generates a certain amount of bending in the trawl 210 dragging process to play a role in guiding nearby water flow so that the water flow flows along the direction of the trawl 210; and the flexible plate 250 is provided with a plurality of parallel flexible plates, so that the net mouth can not be closed due to integral failure caused by damage of the single flexible plate 250, and the stability of the integral device can be improved.
As shown in fig. 1 and 8, a bird scaring rope 500 is arranged behind the hull 100, the bird scaring rope 500 includes a second rope body 510, the second rope body 510 connects the hull 100 and the tension sleeve 300, and color flags 520 are alternately arranged on the second rope body 510; the color flag 520 gradually changes along the second rope 510.
By arranging the bird scaring rope 500, birds approaching ships can be repelled, and the situation that the birds are wound on the trawl 210 to cause damage when catching fishes is prevented; meanwhile, the color flag 520 is arranged on the bird frightening rope 500, so that the height of the bottom trawl 210 in the water can be preliminarily judged according to the position of the color flag 520 in the water, and the trawl 210 can be adjusted in position in the water to catch specific fishery catch.
As shown in fig. 8 and 9, a reinforcing plate 310 is disposed above the tension sleeve 300, a through hole is disposed on the reinforcing plate 310, and the reinforcing plate 310 is attached to the tension sleeve 300.
Through the design of the reinforcing plate 310, the connection between the first pipe body 102 and the tensioning sleeve 300 can be reinforced, the tensioning sleeve 300 can be limited by a plate body to form a certain opening, so that part of the catch can pass through the opening conveniently, and the tensioning sleeve 300 is gradually expanded under the action of larger pressure, so that part of the catch can enter the first pipe body 102 in an accelerated manner.
As shown in fig. 10, a flexible isolation assembly 260 and a flexible isolation assembly 260 are arranged near the tail of the trawl 210, the flexible isolation assembly 260 comprises a flexible isolation net 261, the flexible isolation net 261 vertically divides the trawl 210 into two parts along the fish feeding direction, the middle part of the flexible isolation net 261 is connected with one end of a screen 262, and the other end of the screen 262 is connected with one side of the trawl 210 in the fish feeding direction; an escape area is arranged between the screen 262 and the flexible isolation net 261. The smaller catch can pass through the screen 262 on the upper portion of the flexible isolation assembly 260 and escape; the larger catch passes through a flexible spacer mesh 261. Through the design of the flexible isolation component 260, the young fishery can return to the ocean again, and the environment protection and the resource protection are facilitated.
As shown in fig. 10, 11 and 12, one side of the flexible isolation net 261, which is away from the escape area, includes two adjacently disposed third ropes 263, the two adjacently disposed third ropes 263 are connected by a pulling spring 264, and a corrugated pipe 265 is disposed outside the third ropes 263. This avoids scratching of the catch and provides a spring force to freely control the spacing between the flexible insulation members 260 to avoid breakage thereof and sifting of the catch.
As shown in fig. 13, the front section of the trawl 210 has a hexagonal shape, and the rear section of the trawl 210 has a diamond shape.
By making the meshes of the front section of the trawl 210 hexagonal, part of the catch can be leaked out of the front section of the trawl 210 in the fishing process, so that part of food is provided for seabirds, and the maintenance of marine environment is facilitated; meanwhile, in the fishing process, when the trawl 210 is dragged forwards, the mesh at the front section of the trawl 210 is slowly contracted, so that enough time can be provided for escape when seabirds fall into the trawl carelessly, and the phenomenon that the seabirds die due to winding is favorably prevented.
The embodiments described above are intended to illustrate the technical solutions of the present invention in detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modification, supplement or similar substitution made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. An environment-friendly continuous fishing type euphausia superba trawl, comprising:
the two sides of the rear part of the ship body (100) are respectively and symmetrically connected with one end of a first rope body (101), and the other end of the first rope body (101) is respectively connected with two ends of a dragging assembly (200);
the towing assembly (200), the towing assembly (200) comprises a towing net (210), the towing net (210) is funnel-shaped, the towing net (210) comprises a towing net opening rope (220), floating ball base bodies (230) are arranged on the towing net opening rope (220) at intervals, the bottoms of the floating ball base bodies (230) are connected with the towing net opening rope (220) through circular hooks (231), a tensioning sleeve (300) is arranged on the rear side of the towing net (210), and the anti-explosion net (400) is connected to the rear side of the tensioning sleeve (300);
the fish sucking device is characterized in that one end of a first pipe body (102) is connected to the tensioning sleeve (300), and the first pipe body (102) is connected with a fish sucking pump on the ship body (100);
a floating ball shell (232) is arranged between every two floating ball base bodies (230) in the opposite direction, the floating ball shell (232) wraps half of the floating ball base bodies (230), and a first adjusting plate (233), a second adjusting plate (234) and a third adjusting plate (235) are sequentially arranged between the floating ball shells (232) from top to bottom;
the tensioning sleeve (300) is a net sleeve formed by arranging high-elasticity rope bodies;
the first adjusting plate (233), the second adjusting plate (234) and the third adjusting plate (235) are all bent towards the direction of the trawl door rope (220), and the bending amplitudes of the first adjusting plate (233), the second adjusting plate (234) and the third adjusting plate (235) are sequentially increased;
trawl components (240) are symmetrically arranged on two sides of the trawl (210), the trawl components (240) are connected with a trawl opening rope (220) and a first rope body (101), the trawl components (240) comprise a plurality of flexible plates (250) which are arranged in parallel, and the upper sections and the lower sections of the flexible plates (250) are connected through flexible connecting meshes (241);
a flow guide strip (251) is arranged in the middle of the flexible plate (250), a first opening and a second opening are arranged on two sides of the flow guide strip (251), a first plate body (252) is arranged in the first opening, the first plate body (252) can swing relatively, and a plurality of flow guide plates (253) are arranged in the second opening;
a bird-scaring rope (500) is arranged behind the ship body (100), the bird-scaring rope (500) comprises a second rope body (510), the second rope body (510) is connected with the ship body (100) and the tensioning sleeve (300), and color flags (520) are arranged on the second rope body (510) at intervals;
the color flag (520) gradually changes along the second rope body (510);
when the trawl (210) component is dragged by the ship body (100) through the first rope body (101), the first adjusting plate (233), the second adjusting plate (234) and the third adjusting plate (235) form a force towards the outer side of the trawl opening rope (220) under the impact of water flow, and the trawl (210) opening is opened;
a reinforcing plate (310) is arranged above the tensioning sleeve (300), a through hole is formed in the reinforcing plate (310), and the reinforcing plate (310) is attached to the tensioning sleeve (300);
a flexible isolation assembly (260) is arranged near the tail of the trawl (210), the flexible isolation assembly (260) comprises a flexible isolation net (261), the flexible isolation net (261) vertically divides the trawl (210) into two parts along the fish feeding direction, the middle part of the flexible isolation net (261) is connected with one end of a screen (262), and the other end of the screen (262) is connected with one side of the trawl (210) in the fish feeding direction;
an escape area is arranged between the screen (262) and the flexible isolation net (261).
2. The environment-friendly continuous fishing type euphausia superba trawl as claimed in claim 1, wherein: one side, far away from the escape area, of the flexible isolation net (261) comprises two third rope bodies (263) which are arranged adjacently, the two adjacent third rope bodies (263) are connected through a spring (264), and a corrugated pipe (265) is arranged outside the third rope bodies (263).
3. The environment-friendly continuous euphausia superba trawl as claimed in any one of claims 1 to 2, wherein: the front section meshes of the trawl (210) are hexagonal, and the rear section meshes of the trawl (210) are rhombic.
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| CN115769804B (en) * | 2022-11-23 | 2023-10-03 | 中国水产科学研究院东海水产研究所 | Multi-net-bag type euphausia superba continuous pumping fishing |
| CN115735864B (en) * | 2022-11-23 | 2023-09-26 | 中国水产科学研究院东海水产研究所 | Environment-friendly euphausia superba continuous fishing device |
| CN117176756B (en) * | 2023-09-07 | 2024-04-02 | 青岛海洋地质研究所 | Visual biological trawl system based on underwater vehicle |
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