CN114698606A - Euphausia superba trawl truss device convenient to adjust depth - Google Patents

Euphausia superba trawl truss device convenient to adjust depth Download PDF

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Publication number
CN114698606A
CN114698606A CN202210401929.XA CN202210401929A CN114698606A CN 114698606 A CN114698606 A CN 114698606A CN 202210401929 A CN202210401929 A CN 202210401929A CN 114698606 A CN114698606 A CN 114698606A
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China
Prior art keywords
shell
fixed
rod
adjusting
rope
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Granted
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CN202210401929.XA
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CN114698606B (en
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王鲁民
王永进
齐广瑞
马硕
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East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
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East China Sea Fishery Research Institute Chinese Academy of Fishery Sciences
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01KANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K73/00Drawn nets
    • A01K73/02Trawling nets
    • A01K73/025Regulation of net depth
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/14Fishing vessels
    • B63B35/16Trawlers
    • B63B35/18Trawlers adapted to dragging nets aboard
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention discloses a euphausia superba trawl truss rod device convenient for depth adjustment, and relates to the technical field of trawling fishing gear. The invention works through the power generation mechanism, thereby achieving the effect of self-energy supply, closing the protection assembly, reducing the damage rate of the invention, and in addition, continuously controlling and adjusting the depth of the truss rod through the depth adjusting mechanism, thus leading the invention to have higher applicability and reliability.

Description

Euphausia superba trawl truss rod device convenient for depth adjustment
Technical Field
The invention relates to the technical field of trawler fishing gear, in particular to a euphausia superba trawl truss rod device convenient for depth adjustment.
Background
Antarctic krill is mainly based on phytoplankton as a main food, and adults are suitable for living in water areas with higher temperature and low salt. Antarctic krill is mainly concentrated in the Nanicu. They are distributed around the polar regions with the highest density being in the atlantic region. During fishing, the Antarctic krill is mostly fished by adopting a fishing boat to pull the trusses, and the trusses pull the fishing net to move. Most of the existing trussed beams adopt the methods of changing a traction line and controlling the speed regulation depth of a fishing boat, and the operation mode is complicated. Therefore, a need exists for a euphausia superba trawl boom device that facilitates depth adjustment to solve the above problems.
Disclosure of Invention
The invention aims to provide a euphausia superba trawl truss rod device convenient for depth adjustment, and aims to solve the technical problem that the depth of a truss rod is inconvenient to adjust in the prior art.
The invention provides a euphausia superba trawl truss device convenient for depth adjustment, which comprises a truss rod, wherein a fixed shell is arranged in the middle of the truss rod, a power generation mechanism and a driving mechanism are arranged inside the fixed shell, fixed plate groups are respectively arranged on two sides of the fixed shell, each fixed plate group comprises two fixed plates fixedly connected with the truss rod, a driving rod parallel to the truss rod is arranged above the truss rod, the driving rod penetrates through the fixed shell and all the fixed plates, the driving rod is rotatably connected with the fixed shell and all the fixed plates, two groups of adjusting wings are arranged on the driving rod, the driving mechanism is electrically connected with the power generation mechanism, the driving mechanism is in transmission connection with the driving rod, the depth adjustment mechanism is arranged in front of the truss rod, an upper connecting ring and a lower connecting ring are arranged on each fixed plate, and a first connecting rope with one end connected with the upper connecting ring is arranged on all the upper connecting rings, the equal fixed connection of free end of all first connecting ropes is in the one end of first control rope, all be equipped with one end on the go-between down and connect the rope rather than the second that is connected, the equal fixed connection of free end of all second connection ropes is in the one end of second control rope, first control rope and second control rope all with degree of depth adjustment mechanism fixed connection, the front portion of fixed shell is the loudspeaker form, the rear portion of fixed shell is cylindricly, the front end of fixed shell is equipped with protection machanism.
Further, degree of depth adjustment mechanism is including adjusting the shell, the inside of adjusting the shell is equipped with the regulation frame, the both sides middle part of regulation frame all is equipped with the pivot, the regulation frame rotates with the regulation shell through the pivot to be connected, the one end of first control rope and second control rope respectively with the upper and lower both ends fixed connection of regulation frame, the upper end of adjusting the money is equipped with the swinging arms that the level set up, be equipped with electric putter in the regulation shell, electric putter's output is equipped with one end and rather than articulated connecting rod, the other end and the swinging arms of connecting rod rotate to be connected, be equipped with the first battery that is used for the electric putter power supply in the regulation shell, fixed shell one side is equipped with four short ropes, and the one end of four short ropes is assembled and is used for the fixed rope with the fishing boat for one.
Further, protection machanism includes that a plurality of is the first guard plate that the circumference distributes, and the one end of all first guard plates all with fixed shell fixed connection, the other end of all first guard plates is connected with the installation piece jointly, be equipped with the protection motor on the installation piece, one side of installation piece is equipped with the clamshell that is used for protecting the protection motor, every the inboard of first guard plate all is equipped with the second guard plate rather than the laminating, every the one end of second guard plate all with fixed shell sliding connection, every the other end of second guard plate is connected with the connecting block jointly, the output of protection motor run through the installation piece and with connecting block fixed connection.
Furthermore, all first guard plate all is equipped with along clockwise homonymy and is used for carrying on spacing to the second guard plate.
Further, power generation mechanism includes electricity generation impeller, generating set, controller and second battery, electricity generation impeller rotates the inside that sets up at fixed shell, generating set's input shaft and electricity generation impeller's middle part fixed connection, second battery and controller all set up in fixed shell, and generating set, second battery and protection motor all with controller electric connection.
Further, actuating mechanism includes driving motor, reduction gear, worm, turbine and seal shell, the actuating lever runs through seal shell and rotates between the two to be connected, driving motor, reduction gear, worm and turbine all set up in seal shell, the turbine cover is established on the actuating lever, the worm rotates to be connected in seal shell and worm and turbine meshing, be connected through reduction gear transmission between the one end of worm and driving motor's the output.
Furthermore, the lower extreme of truss is equipped with a plurality of support frames.
Furthermore, a plurality of connecting frames used for enhancing the fixing strength are arranged between the fixing plates.
Compared with the prior art, the invention has the beneficial effects that:
(1) when the self-powered fishing boat is in work, the truss rod is pulled by the fishing boat to move, the protective structure is opened at the moment, and the power generation mechanism works, so that the self-powered effect is achieved, and the self-powered fishing boat is energy-saving and environment-friendly.
(2) When passing through a fish shoal dense area or an area with more impurities in the sea area, the protection assembly can be closed in order to protect the internal power generation mechanism and the driving mechanism, so that the damage rate of the invention is reduced.
(3) When the invention works, if the power generation mechanism or the driving mechanism is damaged, the depth of the truss rod can be continuously controlled and adjusted through the depth adjusting mechanism, so that the invention has higher applicability and reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a partial perspective view of the present invention;
FIG. 4 is a partial cross-sectional view of the present invention;
FIG. 5 is an exploded view of the shield mechanism of the present invention;
FIG. 6 is a partial side view of the depth adjustment mechanism of the present invention.
Reference numerals:
1. a truss; 2. fixing the housing; 3. a power generation mechanism; 31. a power generation impeller; 32. a generator set; 33. a second storage battery; 4. a drive mechanism; 41. a drive motor; 42. sealing the shell; 43. a worm; 44. a turbine; 5. a fixing plate; 6. a drive rod; 7. an adjusting wing; 8. a depth adjustment mechanism; 81. adjusting the housing; 82. an adjusting frame; 83. a rotating shaft; 84. a swing lever; 85. an electric push rod; 86. a connecting rod; 87. short ropes; 88. fixing a rope; 9. an upper connecting ring; 10. a lower connecting ring; 11. a first connecting cord; 12. a second connecting rope; 13. a first control cord; 14. a second control cord; 15. a protection mechanism; 151. a first guard plate; 152. connecting blocks; 153. a protection motor; 154. a housing; 155. a second protection plate; 16. a limiting strip; 17. a support frame; 18. and a connecting frame.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention.
The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 6, an embodiment of the present invention provides a euphausia superba trawl truss device convenient for depth adjustment, including a truss 1, a fixed housing 2 is disposed in the middle of the truss 1, a power generation mechanism 3 and a driving mechanism 4 are disposed inside the fixed housing 2, fixed plate groups are disposed on both sides of the fixed housing 2, each fixed plate group includes two fixed plates 5 fixedly connected to the truss 1, a driving rod 6 parallel to the truss 1 is disposed above the truss 1, the driving rod 6 penetrates through the fixed housing 2 and all the fixed plates 5, the driving rod 6 is rotatably connected to the fixed housing 2 and all the fixed plates 5, two groups of adjusting wings 7 are disposed on the driving rod 6, the driving mechanism 4 is electrically connected to the power generation mechanism 3, the driving mechanism 4 is in transmission connection with the driving rod 6, a depth adjustment mechanism 8 is disposed in front of the truss 1, each fixing plate 5 is provided with an upper connecting ring 9 and a lower connecting ring 10, all the upper connecting rings 9 are provided with first connecting ropes 11 with one ends connected with the upper connecting rings 9, the free ends of all the first connecting ropes 11 are fixedly connected with one ends of first control ropes 13, all the lower connecting rings 10 are provided with second connecting ropes 12 with one ends connected with the lower connecting rings 10, the free ends of all the second connecting ropes 12 are fixedly connected with one ends of second control ropes 14, the first control ropes 13 and the second control ropes 14 are fixedly connected with a depth adjusting mechanism 8, the front part of the fixing shell 2 is horn-shaped, the rear part of the fixing shell 2 is cylindrical, and the front end of the fixing shell 2 is provided with a protection mechanism 15; when the invention works, the truss rod 1 is dragged by a fishing boat to move, at the moment, the protective structure is opened, the power generation mechanism 3 works, so that the effect of self-energy supply is achieved, when the fish pass through a dense fish school area or an area with more impurities in sea area, in order to protect the power generation mechanism 3 and the driving mechanism 4 inside, the protective component can be closed, so that the damage rate of the invention is reduced, in addition, if the power generation mechanism 3 or the driving mechanism 4 is damaged, the depth of the truss rod 1 can be continuously controlled and adjusted through the depth adjusting mechanism 8, so that the invention has higher applicability and reliability.
Specifically, the depth adjusting mechanism 8 comprises an adjusting shell 81, an adjusting frame 82 is arranged inside the adjusting shell 81, the middle parts of the two sides of the adjusting frame 82 are respectively provided with a rotating shaft 83, the adjusting frame 82 is rotatably connected with the adjusting shell 81 through the rotating shaft 83, one end of the first control rope 13 and one end of the second control rope 14 are respectively fixedly connected with the upper end and the lower end of the adjusting frame 82, the upper end of the adjusting part is provided with a horizontally arranged swinging rod 84, the adjusting shell 81 is internally provided with an electric push rod 85, the output end of the electric push rod 85 is provided with a connecting rod 86 with one end hinged with the electric push rod, the other end of the connecting rod 86 is rotatably connected with the swinging rod 84, the adjusting shell 81 is internally provided with a first storage battery used for supplying power to the electric push rod 85, one side of the fixed shell 2 is provided with four short ropes 87, and one ends of the four short ropes 87 are converged into a fixed rope 88 used for being fixed with a fishing boat.
When the concrete work: the fishing boat pulls four short ropes 87 through the fixed ropes 88, in the advancing process, the four short ropes 87 are always in a straight state, the adjusting shell 81 is also necessarily in a vertical state (as shown in fig. 1) at the moment, deflection or deflection does not occur, the adjusting frame 82 is pushed to slightly rotate along the rotating shaft 83 through the work of the electric push rod 85, if one end of the first adjusting rope is pulled to move forwards, one end of the second adjusting rope is placed backwards, the first connecting rope 11 and the second connecting rope 12 can be adjusted in the same way, the upper end of the whole truss rod 1 is made to incline forwards, the adjusting wing 7 is made to incline downwards, the truss rod 1 can be adjusted to submerge in the sea, and on the contrary, the truss rod 1 can rise in the sea to adjust the depth of the truss rod 1 in the sea.
Specifically, the protection mechanism 15 includes a plurality of first protection plates 151 distributed circumferentially, one end of each first protection plate 151 is fixedly connected to the fixed housing 2, the other end of each first protection plate 151 is connected to an installation block, the installation block is provided with a protection motor 153, a housing 154 for protecting the protection motor 153 is arranged on one side of the installation block, a second protection plate 155 attached to the inner side of each first protection plate 151 is arranged on the inner side of each first protection plate 151, one end of each second protection plate 155 is slidably connected to the fixed housing 2, the other end of each second protection plate 155 is connected to a connection block 152, and the output end of the protection motor 153 penetrates through the installation block and is fixedly connected to the connection block 152; the during operation drives connecting block 152 through protection motor 153 work and rotates, and then drives second guard plate 155 and rotate for second guard plate 155 and the crisscross baffle that forms a complete coniform of first guard plate 151, can be located actuating mechanism 4 and the power generation mechanism 3 of fixed shell 2 to the rear and play the effect of protection on the one hand, and on the other hand also can reduce the resistance that longeron 1 removed in the sea.
Specifically, all first guard plate 151 all is equipped with along clockwise homonymy and is used for carrying out spacing 16 to second guard plate 155, and spacing 16 is used for preventing that second guard plate 155 is excessive in rotation, causes the not good condition of protecting effect to take place.
Specifically, the power generation mechanism 3 includes a power generation impeller 31, a power generation unit 32, a controller and a second storage battery 33, the power generation impeller 31 is rotatably disposed inside the fixed housing 2, an input shaft of the power generation unit 32 is fixedly connected to the middle of the power generation impeller 31, the second storage battery 33 and the controller are both disposed inside the fixed housing 2, and the power generation unit 32, the second storage battery 33 and the protection motor 153 are all electrically connected to the controller, specifically, in the moving process, when water flows through the fixed housing 2, a thrust acts on the power generation impeller 31, and can drive the power generation impeller 31 to rotate, so as to drive the power generation unit 32 to generate power, and the generated power is stored by the second storage battery 33 to provide power for subsequent adjustment of the truss rod 1, wherein power generation and energy storage are the prior art, and detailed working circuits thereof are not explained in the present invention.
Specifically, actuating mechanism 4 includes driving motor 41, reduction gear, worm 43, turbine 44 and seal shell 42, actuating lever 6 runs through seal shell 42 and rotates between the two to be connected, driving motor 41, reduction gear, worm 43 and turbine 44 all set up in seal shell 42, turbine 44 cover is established on actuating lever 6, worm 43 rotates to be connected in seal shell 42 and worm 43 and turbine 44 mesh, be connected through reduction gear transmission between the one end of worm 43 and driving motor 41's the output. During specific work, the reducer is driven to work through the work of the driving motor 41, the driving worm 43 rotates, the turbine 44 drives the driving rod 6 to rotate, the adjusting wing 7 installed on the driving rod 6 is driven to rotate, when the front end of the adjusting wing 7 is upward, the truss rod 1 can be driven to ascend, and when the front end of the adjusting wing 7 rotates downward, the truss rod 1 can be driven to dive. Convenient adjustment and use.
Specifically, the lower end of the truss 1 is provided with a plurality of support frames 17, and the support frames 17 play a supporting role when the truss 1 is prevented from being on a fishing boat or the ground.
Specifically, a plurality of connecting frames 18 for enhancing the fixing strength are arranged between the fixing plates 5.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. Euphausia superba trawl longeron device convenient to adjust degree of depth, including longeron (1), its characterized in that: the middle part of the truss rod (1) is provided with a fixed shell (2), the inside of the fixed shell (2) is provided with a power generation mechanism (3) and a driving mechanism (4), the two sides of the fixed shell (2) are respectively provided with a fixed plate group, each fixed plate group comprises two fixed plates (5) fixedly connected with the truss rod (1), a driving rod (6) parallel to the truss rod is arranged above the truss rod (1), the driving rod (6) penetrates through the fixed shell (2) and all the fixed plates (5), the driving rod (6) is rotationally connected with the fixed shell (2) and all the fixed plates (5), two groups of adjusting wings (7) are arranged on the driving rod (6), the driving mechanism (4) is electrically connected with the power generation mechanism (3), the driving mechanism (4) is in transmission connection with the driving rod (6), the front of the truss rod (1) is provided with a depth adjusting mechanism (8), every all be equipped with go up go-between (9) and go-between (10) down on fixed plate (5), all go up go-between (9) and all be equipped with one end and the first connecting rope (11) of being connected with it, the equal fixed connection in the one end of first control rope (13) of the free end of all first connecting rope (11), all be equipped with one end and the second connecting rope (12) of being connected with it on go-between (10) down, the equal fixed connection in the one end of second control rope (14) of the free end of all second connecting rope (12), first control rope (13) and second control rope (14) all with degree of depth adjustment mechanism (8) fixed connection, the front portion of fixed shell (2) is loudspeaker form, the rear portion of fixed shell (2) is cylindric, the front end of fixed shell (2) is equipped with protection machanism (15).
2. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 1, wherein: the depth adjusting mechanism (8) comprises an adjusting shell (81), an adjusting frame (82) is arranged inside the adjusting shell (81), rotating shafts (83) are arranged in the middle of the two sides of the adjusting frame (82), the adjusting frame (82) is rotatably connected with the adjusting shell (81) through the rotating shafts (83), one ends of a first control rope (13) and a second control rope (14) are fixedly connected with the upper end and the lower end of the adjusting frame (82) respectively, a horizontally arranged swinging rod (84) is arranged at the upper end of the adjusting rope, an electric push rod (85) is arranged in the adjusting shell (81), one end of the output end of the electric push rod (85) is provided with a connecting rod (86) hinged with the electric push rod, the other end of the connecting rod (86) is rotatably connected with the swinging rod (84), a first storage battery used for supplying power to the electric push rod (85) is arranged in the adjusting shell (81), four short ropes (87) are arranged on one side of the fixed shell (2), and one ends of the four short ropes (87) are converged into a fixed rope (88) fixed with a fishing boat.
3. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 1, wherein: protection machanism (15) include that a plurality of is first guard plate (151) that the circumference distributes, the one end of all first guard plates (151) all with fixed shell (2) fixed connection, the other end of all first guard plates (151) is connected with the installation piece jointly, be equipped with protection motor (153) on the installation piece, one side of installation piece is equipped with shell cover (154) that are used for protecting protection motor (153), every the inboard of first guard plate (151) all is equipped with second guard plate (155) rather than the laminating, every the one end of second guard plate (155) all with fixed shell (2) sliding connection, every the other end of second guard plate (155) is connected with connecting block (152) jointly, the output of protection motor (153) run through the installation piece and with connecting block (152) fixed connection.
4. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 3, wherein: all the first protection plates (151) are provided with limiting strips (16) used for limiting the second protection plates (155) on the same side in the clockwise direction.
5. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 3, wherein: the power generation mechanism (3) comprises a power generation impeller (31), a power generator, a controller and a second storage battery (33), the power generation impeller (31) is rotatably arranged inside the fixed shell (2), an input shaft of the power generator is fixedly connected with the middle of the power generation impeller (31), the second storage battery (33) and the controller are both arranged in the fixed shell (2), and the power generator, the second storage battery (33) and the protection motor (153) are both electrically connected with the controller.
6. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 1, wherein: actuating mechanism (4) include driving motor (41), reduction gear, worm (43), turbine (44) and sealed shell (42), sealed shell (42) and rotation between the two are run through in actuating lever (6) and are connected, driving motor (41), reduction gear, worm (43) and turbine (44) all set up in sealed shell (42), turbine (44) cover is established on actuating lever (6), worm (43) rotate to be connected in sealed shell (42) and worm (43) and turbine (44) meshing, be connected through reduction gear transmission between the one end of worm (43) and the output of driving motor (41).
7. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 1, wherein: the lower end of the truss rod (1) is provided with a plurality of support frames (17).
8. The euphausia superba trawl boom apparatus facilitating depth adjustment according to claim 1, wherein: a plurality of connecting frames (18) used for enhancing the fixing strength are arranged between the fixing plates (5).
CN202210401929.XA 2022-04-18 2022-04-18 Euphausia superba trawl truss device convenient to adjust depth Active CN114698606B (en)

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