Krill catching device

Abstract

The invention belongs to the technical field of fishing devices, and particularly relates to a krill fishing device which comprises a traction mechanism connected with a fishing boat, the traction mechanism comprises a traction plate connected with the fishing boat through a connecting rope, and two propellers are rotationally connected into the traction plate through hydraulic driving parts. The traction mechanism further comprises a hydraulic control system, and the hydraulic control system regulates and controls the double propellers to rotate in the same direction or in different directions through a hydraulic oil way. The double propellers are driven to rotate in the same direction through oil way control of a hydraulic control system of the traction mechanism, and the fishing gear is pulled to move in a vertical water-layer-changing mode. Through oil path control of a hydraulic control system of the traction mechanism, double propellers of the driving device rotate in different directions, and the horizontal or inclined posture of the fishing gear horizontal expansion arm support is dragged and adjusted when the fishing boat is dragged directionally or turns or turns around.

Description

Technical Field

[0001] The invention belongs to the technical field of fishing devices, in particular to a krill fishing device. Background Art

[0002] At present, the "Antarctic krill fishing beam trawl" adopted by existing technologies at home and abroad uses a fixed length of "beam" for the horizontal expansion of the net. Due to the influence of the hull size of the fishing boat and the convenience of operation, the length of the "beam" is generally about 18 meters. In order to improve the fishing efficiency, a boat must use the support frames extending from both sides of the hull to tow the net at the same time. When designing and building the fishing boat, it must be equipped with large-scale ship-side support frames and supporting equipment (which conventional fishing boats do not have), resulting in high construction costs; at the same time, the net needs to be placed and raised separately during the net fishing operation, which is highly complicated and time-consuming.

[0003] In the prior art, the fishing depth of the fishing net towed by the fishing vessel depends on the towing speed of the fishing vessel and the length of the towing rope. The net itself cannot actively adjust according to the density changes of the shrimp school in the water layers at different depths to track the fishing. When the fishing vessel needs to turn or turn around during the fishing process of towing the net, the posture of the net cannot be adjusted, resulting in a large turning or turning radius of the fishing vessel and reduced fishing efficiency.

[0004] To this end, the present invention provides a krill fishing device. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a krill fishing device described in the present invention includes a traction mechanism connected to a fishing boat, the traction mechanism includes a traction plate connected to the fishing boat through a connecting rope, the interior of the traction plate is rotatably connected to two propellers through a hydraulic drive component, the traction mechanism also includes a hydraulic control system, the hydraulic control system controls the same-direction or different-direction rotation of the twin propellers through hydraulic oil circuit regulation, a trawl is fixedly installed at one end of the connecting rope away from the fishing boat, a net-collecting and net-squeezing mechanism is provided on the surface of the trawl, a sleeve-type boom mechanism for controlling its extension and contraction is provided on the trawl, a release mechanism is fixedly installed at one end of the trawl away from the connecting rope, and the release mechanism is fixed at one end of the trawl away from the trawl. A net bag connected to the interior is fixedly installed; an outer sleeve fixedly connected to the sleeve-type boom mechanism and the trawl net, an inner tube assembly, a fixed pulley assembly, a wire rope assembly, a hydraulic rod and an oil cylinder are arranged in the outer sleeve; the inner tube assembly comprises a first left inner sleeve and a first right inner sleeve symmetrically arranged in the outer sleeve, the first left inner sleeve and the first right inner sleeve slide in the outer sleeve, the first left inner sleeve is slidably connected to the second left inner sleeve, the first right inner sleeve is slidably connected to the second right inner sleeve, and the bottoms of the second left inner sleeve and the second right inner sleeve are fixedly connected to the trawl net; the fixed pulley assembly comprises a first fixed pulley arranged in the first right inner sleeve, the outer sleeve is rotatably connected to the second fixed pulley, the first left inner sleeve is rotatably connected to the second fixed pulley There is a third fixed pulley, a fourth fixed pulley is rotatably connected in the outer sleeve, one end of the first right inner sleeve is rotatably connected to the fifth fixed pulley, and one end of the first left inner sleeve is rotatably connected to the sixth fixed pulley; the wire rope assembly includes a first steel wire rope fixedly connected to the inner wall of the outer sleeve, the first steel wire rope passes through the first fixed pulley and is fixedly connected to the second right inner sleeve, a second steel wire rope is arranged on the surface of the second fixed pulley, one end of the second steel wire rope is fixedly connected to the first right inner sleeve, the other end of the second steel wire rope is fixedly connected to the first left inner sleeve, a third steel wire rope is arranged on the surface of the third fixed pulley, one end of the third wire rope is fixedly connected to the second left inner sleeve, the other end of the third wire rope is fixedly connected, and the fourth fixed pulley A fourth steel wire rope is provided on the surface of the fourth steel wire rope, one end of the fourth steel wire rope is fixedly connected to the first left inner casing, and the other end of the fourth steel wire rope is fixedly connected to the first right inner casing, a fifth steel wire rope is provided on the surface of the fifth fixed pulley, one end of the fifth steel wire rope is fixedly connected to the second right inner casing, and the other end of the fifth steel wire rope is fixedly connected to the outer casing, a sixth steel wire rope is provided on the surface of the sixth fixed pulley, one end of the sixth steel wire rope is fixedly connected to the second left inner casing, and the other end of the sixth steel wire rope is fixedly connected to the outer casing; a hydraulic rod is fixedly installed in the outer casing near the first right inner casing, and an oil cylinder is fixedly installed at one end of the hydraulic rod, and the oil cylinder is located in the first right inner casing, and the first fixed pulley and the oil cylinder are rotatably connected.

[0007] Furthermore, the front ring net body of the trawl is installed on the rope-grasping ring of the rope, and the rope-grasping and gathering mechanism has a pullable rope-grasping rope built in.

[0008] Furthermore, the release mechanism includes an outer cylinder and an inner cylinder, the inner cylinder rotates inside the outer cylinder, an outer release port is provided at the top of the outer cylinder, an inner release port is provided at the top of the inner cylinder, an inlet is provided at one end of the inner cylinder, and a pipe is installed between the inner release port and the inlet.

[0009] Furthermore, the inner cylinder is provided with a plurality of partitions at one end close to the inlet, and the partitions are of a concave rotary vane type.

[0010] Furthermore, the trawl net gradually narrows from one end close to the traction plate to one end far away from the traction plate, the pipe is in an "L" shape, and the long arm end of the pipe is inclined.

[0011] Furthermore, a protective net is fixedly installed at one end of the trawl close to the traction board, and a light is fixedly installed on the surface of the protective net.

[0012] Furthermore, a spraying mechanism is provided in the traction plate, and the spraying mechanism includes a loading box fixedly installed in the traction plate, a push plate is slidably connected to the loading box through a spring, a magnetic block is fixedly installed on a side of the push plate close to the spring, an electromagnet is fixedly installed in the loading box, a liquid outlet pipe connected to the interior and with a one-way valve is fixedly installed on one side of the loading box, one end of the liquid outlet pipe is close to the propeller, and a liquid inlet pipe connected to the interior and with a one-way valve is provided on the top of the loading box.

[0013] Furthermore, a sealing gasket is fixedly installed on the surface of the push plate, and the sealing gasket is made of rubber material and fits the inner wall of the loading box.

[0014] Furthermore, two symmetrically arranged arc-shaped guide plates are fixedly installed in the liquid outlet pipe, and one side of the guide plate is rotatably connected to a pendulum ball made of rubber material through a torsion spring.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. A krill fishing device described in the present invention, when the fishing gear is towed by a fishing boat to move horizontally in a fixed water layer, the oil circuit control of the hydraulic control system of the traction mechanism drives the double propellers to rotate in the same direction, and the fishing gear is towed to move vertically in a variable water layer. Through the oil circuit control of the hydraulic control system of the traction mechanism, the double propellers of the driving device rotate in different directions, and the horizontal expansion boom of the fishing gear is adjusted to a horizontal or tilted posture when the fishing boat is towing in a directional manner or turning or turning around. The fishing gear is put in the best posture, and the running track of the fishing boat and the fishing gear is adjusted to the best state. The sleeve-type boom mechanism is in a retracted state when on board; when released in the water for fishing operations, the sleeve-type boom can be extended by more than 3 times the length through the combined drive of "hydraulic rod + wire rope". The retracted sleeve-type boom is convenient for the fishing boat to carry and the operation of releasing or collecting; after the sleeve-type boom is extended, its horizontal expansion of the net is increased, which can greatly improve the efficiency of fishing operations. At the same time, a large mesh protective net is made of luminous wire material and installed at the mouth of the trawl net to prevent small Antarctic krill from passing through the net and block large mammals from entering the net. The net with underwater luminous function can drive mammals away from close range and avoid contact scratches from the blocking net, reducing the harm to mammals caused by Antarctic krill fishing activities.

[0017] 2. The krill fishing device described in the present invention solves the contradiction that the length of the traditional truss is not convenient for operation in the narrow space of the fishing boat, and its length limits the horizontal expansion scale of the trawl net when fishing in the sea. The extendable and retractable sleeve-type arm mechanism can be operated using existing fishing boats and equipment, solving the problem of high construction costs of professional boats, and has strong technical applicability. Compared with the existing professional fishing boats, the "truss" is 18 meters long and uses the support frames extending from both sides of the hull to tow two sets of nets at the same time. After the extension of this technology, the arm length can reach 26 meters, and the fishing efficiency in seawater is increased; after the contraction, the length is only 9 meters, which is convenient for operation on the fishing boat. Under the condition of the same fishing efficiency, a set of fishing gear is used for fishing operations, and the complexity of the operation is greatly reduced, and the operation time of setting and lifting the net for fishing production is greatly reduced.

[0018] 3. The krill fishing device described in the present invention aims at the uneven distribution of the density of Antarctic krill and the change in the water depth of the high-density shrimp area in the fishing ground at the same time. The fishing gear is towed to make vertical water layer movement to achieve tracking and fishing in the high-density shrimp area, thereby improving the efficiency of fishing operations. In view of the relatively concentrated Antarctic krill fishing grounds, the fishing production requires trawling back and forth in the same fishing ground. The horizontal expansion arm of the fishing gear is adjusted by towing to be horizontal or tilted when the fishing boat is towing in a directional manner or turning or turning around. The fishing gear is put in the best posture, and the running track of the fishing boat and the fishing gear is adjusted to the best state. The turning and turning time is reduced, and the timeliness of fishing production is improved.

[0019] 4. A krill fishing device described in the present invention, by energizing the electromagnet in the loading box, makes the electromagnet and the magnetic block on the push plate repel each other with the same polarity, and the push plate drives the spring and the sealing gasket to slide in the direction away from the electromagnet, and pushes the preservative in the loading box to spray out through the liquid outlet pipe, and sprays the preservative to the propeller. Since both the liquid inlet pipe and the liquid outlet pipe are equipped with a one-way valve, the preservative squeezed by the push plate will only be sprayed to the propeller through the liquid outlet pipe. Since an arc-shaped guide plate is installed at the liquid outlet pipe, the preservative will be guided to the surroundings of the propeller, thereby increasing the spraying area, and spraying the preservative on the propeller more quickly and efficiently. There is no need for the staff to perform anti-corrosion operations on the propeller regularly. After a large amount of preservative is sprayed out of the liquid outlet pipe, the pendulum ball will follow the swing, and then hit the guide plate, causing the guide plate to vibrate, thereby reducing the impurities in the seawater remaining on the guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the trawl in the present invention;

[0022] Figure 2 It is a structural schematic diagram of the sleeve-type boom mechanism in the extended state in the present invention;

[0023] Figure 3 It is a structural schematic diagram of the sleeve-type boom mechanism in the retracted state in the present invention;

[0024] Figure 4 It is a schematic cross-sectional structural diagram of the traction plate in the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the release mechanism in the present invention;

[0026] Figure 6 It is a schematic cross-sectional structural diagram of the inner cylinder in the present invention;

[0027] Figure 7 It is a cross-sectional structural schematic diagram of the sleeve type boom mechanism in the present invention;

[0028] Figure 8 The present invention Figure 4 A schematic diagram of the structure at A;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure of the liquid outlet pipe in the present invention.

[0030] In the figure: 10, traction mechanism; 11, traction plate; 12, propeller;

[0031] 20. Sleeve-type arm support mechanism; 21. Outer sleeve;

[0032] 22, inner tube assembly; 221, first left inner sleeve; 222, first right inner sleeve; 223, second left inner sleeve; 224, second right inner sleeve;

[0033] 23. Fixed pulley assembly; 231. First fixed pulley; 232. Second fixed pulley; 233. Third fixed pulley; 234. Fourth fixed pulley; 235. Fifth fixed pulley; 236. Sixth fixed pulley;

[0034] 24. Steel wire rope assembly; 241. First steel wire rope; 242. Second steel wire rope; 243. Third steel wire rope; 244. Fourth steel wire rope; 245. Fifth steel wire rope; 246. Sixth steel wire rope;

[0035] 25. Hydraulic rod; 26. Cylinder;

[0036] 30. Protective net;

[0037] 40. Collect and consolidate the organization;

[0038] 50. Trawl;

[0039] 60. Release mechanism; 61. Outer cylinder; 62. Inner cylinder; 63. Outer release port; 64. Pipe; 65. Inner release port; 66. Inlet; 67. Separation deletion;

[0040] 70. Reticulum;

[0041] 80. Spraying mechanism; 81. Loading box; 82. Push plate; 83. Electromagnet; 84. Magnetic block; 85. Spring; 86. Liquid outlet pipe; 87. Sealing gasket; 88. Guide plate; 89. Pendulum ball. DETAILED DESCRIPTION

[0042] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0043] like Figures 1 to 9 As shown, a krill fishing device according to an embodiment of the present invention comprises a traction mechanism 10 connected to a fishing boat, the traction mechanism 10 comprises a traction plate 11 connected to the fishing boat via a connecting rope, two propellers 12 are rotatably connected to the traction plate 11 via a hydraulic driving member, a trawl 50 is fixedly installed at one end of the connecting rope away from the fishing boat, a net collecting and sweeping mechanism 40 is provided on the surface of the trawl 50, a sleeve-type arm mechanism 20 for controlling the extension and contraction of the trawl 50 is provided on the trawl 50, a release mechanism 60 is fixedly installed at one end of the trawl 50 away from the connecting rope, and a net bag 70 connected to the inside of the release mechanism 60 is fixedly installed at one end of the release mechanism 60 away from the trawl 50;

[0044] Specifically, the sleeve-type arm mechanism 20 and the outer sleeve 21 are fixedly connected to the trawl net 50, and the outer sleeve 21 is provided with an inner tube assembly 22, a fixed pulley assembly 23, a wire rope assembly 24, a hydraulic rod 25 and an oil cylinder 26; the inner tube assembly 22 includes a first left inner sleeve 221 and a first right inner sleeve 222 symmetrically arranged in the outer sleeve 21, the first left inner sleeve 221 and the first right inner sleeve 222 slide in the outer sleeve 21, the first left inner sleeve 221 is slidably connected with the second left inner sleeve 223, the first right inner sleeve 222 is slidably connected with the second right inner sleeve 224, and the bottoms of the second left inner sleeve 223 and the second right inner sleeve 224 are both connected to the trawl net 50. Fixed connection; the fixed pulley assembly 23 includes a first fixed pulley 231 arranged in the first right inner sleeve 222, a second fixed pulley 232 is rotatably connected in the outer sleeve 21, a third fixed pulley 233 is rotatably connected in the first left inner sleeve 221, a fourth fixed pulley 234 is rotatably connected in the outer sleeve 21, a fifth fixed pulley 235 is rotatably connected to one end of the first right inner sleeve 222, and a sixth fixed pulley 236 is rotatably connected to one end of the first left inner sleeve 221; the wire rope assembly 24 includes a first steel wire rope 241 fixedly connected to the inner wall of the outer sleeve 21, the first steel wire rope 241 passes through the first fixed pulley 231 and is fixedly connected to the second right inner sleeve 224, and the second A second steel wire rope 242 is provided on the surface of the fixed pulley 232, one end of the second steel wire rope 242 is fixedly connected to the first right inner sleeve 222, and the other end of the second steel wire rope 242 is fixedly connected to the first left inner sleeve 221. A third steel wire rope 243 is provided on the surface of the third fixed pulley 233, one end of the third steel wire rope 243 is fixedly connected to the second left inner sleeve 223, and the other end of the third steel wire rope 243 is fixedly connected. A fourth steel wire rope 244 is provided on the surface of the fourth fixed pulley 234, one end of the fourth steel wire rope 244 is fixedly connected to the first left inner sleeve 221, and the other end of the fourth steel wire rope 244 is fixedly connected to the first right inner sleeve 222. A fifth steel wire rope 245 is arranged on the surface of the wheel, one end of the fifth steel wire rope 245 is fixedly connected to the second right inner sleeve 224, and the other end of the fifth steel wire rope 245 is fixedly connected to the outer sleeve 21; a sixth steel wire rope 246 is arranged on the surface of the sixth fixed pulley 236, one end of the sixth steel wire rope 246 is fixedly connected to the second left inner sleeve 223, and the other end of the sixth steel wire rope 246 is fixedly connected to the outer sleeve 21; a hydraulic rod 25 is fixedly installed in the outer sleeve 21 near the first right inner sleeve 222, one end of the hydraulic rod 25 is fixedly installed with a cylinder 26, the cylinder 26 is in the first right inner sleeve 222, and the first fixed pulley 231 and the cylinder 26 are rotatably connected.

[0045] Specifically, the front ring net body of the trawl 50 is installed on the rope ring of the rope, and the rope collection and collection mechanism 40 is built with a pullable rope. The release mechanism 60 includes an outer cylinder 61 and an inner cylinder 62, the inner cylinder 62 rotates in the outer cylinder 61, the top of the outer cylinder 61 is provided with an outer release port 63, the top of the inner cylinder 62 is provided with an inner release port 65, one end of the inner cylinder 62 is provided with an inlet 66, and a pipe 64 is installed between the inner release port 65 and the inlet 66. The inner cylinder 62 is provided with a plurality of partitions 67 at one end close to the inlet 66, and the partitions 67 are concave rotary vane type. The trawl 50 gradually narrows from the end close to the traction plate 11 to the end away from the traction plate 11, the pipe 64 is "L" shaped, and the long arm end of the pipe 64 is inclined. A protective net 30 is fixedly installed at the end of the trawl 50 close to the traction plate 11, and a light is fixedly installed on the surface of the protective net 30.

[0046] During operation, when the fishing gear is towed by the fishing boat to move horizontally in the fixed water layer, the oil circuit control of the hydraulic control system of the traction mechanism 10 drives the twin propellers 12 to rotate in the same direction, and the fishing gear is towed to move vertically in the variable water layer. Through the oil circuit control of the hydraulic control system of the traction mechanism 10, the twin propellers 12 of the driving device rotate in different directions, and the horizontal expansion arm of the fishing gear is adjusted to the horizontal or tilted posture when the fishing boat is towing in a directional manner or turning or turning around. The fishing gear is put in the best posture, and the running track of the fishing boat and the fishing gear is adjusted to the best state. The sleeve-type arm mechanism 20 is in a retracted state when on the boat; when released in the water for fishing operations, the sleeve-type arm can be extended by more than 3 times the length through the combined drive of the "hydraulic rod 25 + wire rope". The retracted sleeve-type arm is convenient for the fishing boat to carry and the operation of releasing or collecting; after the sleeve-type arm is extended, its horizontal expansion of the net is increased, which can greatly improve the efficiency of fishing operations. At the same time, a large mesh protective net 30 is woven with luminous wire materials and installed at the net mouth of the trawl 50 to prevent small Antarctic krill from passing through the net and block large mammals from entering the net. The mesh with underwater luminous function can drive mammals away at close range to avoid contact scratches from the blocking mesh, thereby reducing the harm to mammals caused by Antarctic krill fishing activities. During the process of setting and hauling the net in fishing operations, the net body can be gathered by pulling the rope inserted in the rope ring; when the trawl 50 enters the sea for fishing, the rope inserted in the rope ring naturally unfolds under the water expansion force of the net. The pulled and gathered net body can be connected and detached with the net and the retracted arm. At the same time, the pulled rope can be used as the twisting and pulling force rope of the net when setting and hauling the net, reducing the difficulty and safety hazards of large net operation and improving the efficiency of setting or hauling the net.

[0047] The design of the inner cylinder 62 and the outer cylinder 61 enables the inner cylinder 62 to have a free rotation function. The outer cylinder 61 is connected to the trawl net 50 and the net bag 70 respectively. The cylinder wall of the outer cylinder 61 is provided with a circular outer release port 63; the cylinder wall of the inner cylinder 62 is provided with an equally circular inner release port 65, and the positions of the inner release port 65 and the outer release port 63 correspond. The cylinder wall at the front end of the inner cylinder 62 and the concave central circular hole are equipped with a partition 67 with a certain slat angle and board angle (slat angle: under the action of hydrodynamics, individual larger fish can be stored in the pipe 64; board angle: under the action of hydrodynamics, the inner cylinder 62 can be driven to rotate unidirectionally), and the circular open port on the wall of the inner cylinder 62 is connected to the concave central circular hole through a pipe 64 (with shrimp or water filter grooves). During the fishing and towing process, smaller krill pass through the partition 67 into the net bag 70, and larger fish enter the pipe 64. When the inner cylinder 62 rotates until the inner release port 65 and the outer release port 63 overlap, the stored fish are released into the sea, thereby improving the selective fishing of Antarctic krill, reducing the sorting of fish and shrimp after they are mixed on board, reducing damage to protected fish in the Antarctic waters, and improving the international compliance capacity and level of Antarctic krill fishing production.

[0048] The specific working principle of the sleeve type boom mechanism 20 is as follows: when the hydraulic rod 25 is extended by hydraulic pressure, the oil cylinder 26 drives the first right inner sleeve 222 to extend, and drives the second right inner sleeve 2242 to extend through the first fixed pulley 231 and the first wire rope 241; when the first right inner sleeve 222 is extended, the first left inner sleeve 221 is extended through the fourth fixed pulley 234 and the fourth wire rope 244, and the second left inner sleeve 223 is extended through the third fixed pulley 233 and the third wire rope 243. When the hydraulic rod 25 is retracted, the oil cylinder 26 drives the first right inner sleeve to retract, and drives the second right inner sleeve 224 to retract through the fifth fixed pulley 235 and the fifth wire rope 245; when the first right inner sleeve 222 is retracted, the first left inner sleeve 221 is retracted through the second fixed pulley 232 and the second wire rope 242, and the second left inner sleeve 223 is retracted through the sixth fixed pulley 236 and the sixth wire rope 246.

[0049] The specific working principle of the net-collecting and enclosing mechanism 40 is as follows: the net-collecting mechanism 40 is pulled and twisted by the net-winding machine on the fishing vessel, and the net mouth part can be relaxed after the net-collecting mechanism is stressed, which is a special design that facilitates the rapid connection and disassembly of the trawl net 50 and the sleeve-type arm mechanism 20.

[0050] The present application solves the contradiction that the length of the traditional truss is not convenient for operation in the narrow space of the fishing boat, and its length limits the horizontal extension scale of the trawl net 50 when fishing in the seawater. The extendable and retractable sleeve arm mechanism 20 can be operated by using existing fishing boats and equipment, solving the problem of high construction cost of professional boats, and has strong technical applicability. Compared with the existing professional fishing boat fishing, the "truss" is 18 meters long and the support frame extending from both sides of the hull is used to tow two sets of nets at the same time. After the extension of this technology, the arm length can reach 26 meters, and the fishing efficiency in the seawater is increased; after the contraction, the length is only 9 meters, which is convenient for operation on the fishing boat. Under the condition of the same fishing efficiency, a set of fishing gear is used for fishing operations, and the complexity of its operation is greatly reduced, and the operation time of setting and lifting the net for fishing production is greatly reduced. At the same time, in view of the uneven distribution of the density of Antarctic krill shrimp groups and the change of water depth in the high-density shrimp group area of ​​the fishing ground at the same time, the fishing gear is towed to perform vertical water layer movement to achieve tracking and fishing in the high-density shrimp group area, thereby improving the efficiency of fishing operations. In view of the fact that Antarctic krill fishing grounds are relatively concentrated and fishing production requires trawling 50 degrees back and forth in the same fishing ground, the horizontal expansion arm of the fishing gear is adjusted by traction to adjust the horizontal or tilted posture of the fishing boat when the fishing boat is directional towing or turning or turning around. The fishing gear is in the best posture and the running track of the fishing boat and the fishing gear is adjusted to the best state. The turning and turning time is reduced, and the fishing production time efficiency is improved.

[0051] A spraying mechanism 80 is arranged in the traction plate 11, and the spraying mechanism 80 includes a loading box 81 fixedly installed in the traction plate 11, a push plate 82 is slidably connected to the loading box 81 through a spring 85, a magnetic block 84 is fixedly installed on one side of the push plate 82 close to the spring 85, an electromagnet 83 is fixedly installed in the loading box 81, a liquid outlet pipe 86 connected to the interior and with a one-way valve is fixedly installed on one side of the loading box 81, one end of the liquid outlet pipe 86 is close to the propeller 12, and a liquid inlet pipe connected to the interior and with a one-way valve is arranged on the top of the loading box 81.

[0052] Specifically, a sealing pad 87 is fixedly installed on the surface of the push plate 82. The sealing pad 87 is made of rubber and fits the inner wall of the loading box 81. Two symmetrically arranged arc guide plates 88 are fixedly installed in the liquid outlet pipe 86. One side of the guide plate 88 is rotatably connected to a swing ball 89 made of rubber through a torsion spring.

[0053] During operation, when the propeller 12 has been working in seawater for a long time, the salt and moisture in the seawater are very likely to corrode the metal part of the propeller 12. At this time, by energizing the electromagnet 83 in the loading box 81, the electromagnet 83 and the magnetic block 84 on the push plate 82 are repelled by the same polarity, and the push plate 82 drives the spring 85 and the sealing gasket 87 to slide away from the electromagnet 83, and pushes the preservative in the loading box 81 to spray out through the liquid outlet pipe 86, and sprays the preservative to the propeller 12. Since both the liquid inlet pipe and the liquid outlet pipe 86 are equipped with a one-way valve, the preservative squeezed by the push plate 82 will only be sprayed to the propeller 12 through the liquid outlet pipe 86. Since an arc-shaped guide plate 88 is installed at the liquid outlet pipe 86, the preservative will be guided to the surroundings of the propeller 12, thereby increasing the spraying area, and spraying the preservative on the propeller 12 more quickly and efficiently. In addition, there is no need for the staff to perform anti-corrosion operations on the propeller 12 regularly. After a large amount of preservative is sprayed out of the liquid outlet pipe 86 , the swing ball 89 will swing along and then hit the guide plate 88 , causing the guide plate 88 to vibrate, thereby reducing the impurities in the seawater remaining on the guide plate 88 .

[0054] Working principle: When the fishing gear is towed by the fishing boat to move horizontally in the fixed water layer, the oil circuit control of the hydraulic control system of the traction mechanism 10 drives the twin propellers 12 to rotate in the same direction, and the fishing gear is towed to move vertically in the water layer. Through the oil circuit control of the hydraulic control system of the traction mechanism 10, the twin propellers 12 of the driving device rotate in different directions, and the horizontal expansion boom of the fishing gear is adjusted to the horizontal or tilted posture when the fishing boat is towing in a directional manner or turning or turning around. The fishing gear is in the best posture, and the running track of the fishing boat and the fishing gear is adjusted to the best state. The sleeve-type boom mechanism 20 is in a retracted state when on the boat; when released in the water for fishing operations, the sleeve-type boom can be extended by more than 3 times the length through the combined drive of "hydraulic rod 25 + wire rope". The retracted sleeve-type boom is convenient for the fishing boat to carry and the operation of releasing or collecting; after the sleeve-type boom is extended, its horizontal expansion of the net is increased, which can greatly improve the efficiency of fishing operations. At the same time, a large mesh protective net 30 is woven with luminous wire materials and installed at the net mouth of the trawl 50 to prevent small Antarctic krill from passing through the net and block large mammals from entering the net. The mesh with underwater luminous function can drive mammals away at close range to avoid contact scratches from the blocking mesh, thereby reducing the harm to mammals caused by Antarctic krill fishing activities. During the process of setting and hauling the net in fishing operations, the net body can be gathered by pulling the rope inserted in the rope ring; when the trawl 50 enters the sea for fishing, the rope inserted in the rope ring naturally unfolds under the water expansion force of the net. The pulled and gathered net body can be connected and detached with the net and the retracted arm. At the same time, the pulled rope can be used as the twisting and pulling force rope of the net when setting and hauling the net, reducing the difficulty and safety hazards of large net operation and improving the efficiency of setting or hauling the net.

[0055] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A krill fishing device, characterized in that: The invention comprises a traction mechanism (10) connected to a fishing boat, wherein the traction mechanism (10) comprises a traction plate (11) connected to the fishing boat via a connecting rope, wherein the interior of the traction plate (11) is rotatably connected to two propellers (12) via a hydraulic drive component, and the traction mechanism (10) further comprises a hydraulic control system, wherein the hydraulic control system controls the co-directional or counter-directional rotation of the twin propellers via a hydraulic oil circuit, wherein a trawl (50) is fixedly mounted on the end of the connecting rope away from the fishing boat, a net collecting and gathering mechanism (40) is arranged on the surface of the trawl (50), a sleeve-type arm mechanism (20) for controlling the extension and contraction of the trawl (50), a release mechanism (60) is fixedly mounted on the end of the trawl (50) away from the connecting rope, and a net bag (70) connected to the interior of the trawl (50) is fixedly mounted on the end of the release mechanism (60) away from the trawl (50); The sleeve-type boom mechanism (20) and the trawl net (50) are fixedly connected to an outer sleeve (21), wherein an inner tube assembly (22), a fixed pulley assembly (23), a wire rope assembly (24), a hydraulic rod (25) and an oil cylinder (26) are arranged inside the outer sleeve (21).

2. A krill fishing device according to claim 1, characterized in that: The inner tube assembly (22) comprises a first left inner tube (221) and a first right inner tube (222) symmetrically arranged in the outer tube (21); the first left inner tube (221) and the first right inner tube (222) slide in the outer tube (21); a second left inner tube (223) is slidably connected in the first left inner tube (221); a second right inner tube (224) is slidably connected in the first right inner tube (222); the bottoms of the second left inner tube (223) and the second right inner tube (224) are fixedly connected to the trawl net (50); The fixed pulley assembly (23) comprises a first fixed pulley (231) arranged in the first right inner sleeve (222); a second fixed pulley (232) is rotatably connected in the outer sleeve (21); a third fixed pulley (233) is rotatably connected in the first left inner sleeve (221); a fourth fixed pulley (234) is rotatably connected in the outer sleeve (21); a fifth fixed pulley (235) is rotatably connected at one end of the first right inner sleeve (222); and a sixth fixed pulley (236) is rotatably connected at one end of the first left inner sleeve (221); The wire rope assembly (24) comprises a first wire rope (241) fixedly connected to the inner wall of the outer sleeve (21); the first wire rope (241) passes through the first fixed pulley (231) and is fixedly connected to the second right inner sleeve (224); a second wire rope (242) is arranged on the surface of the second fixed pulley (232); one end of the second wire rope (242) is fixedly connected to the first right inner sleeve (222); the other end of the second wire rope (242) is fixedly connected to the first left inner sleeve (221); a third wire rope (243) is arranged on the surface of the third fixed pulley (233); one end of the third wire rope (243) is fixedly connected to the second left inner sleeve (223); the other end of the third wire rope (243) is fixedly connected to the fourth fixed pulley (233); A fourth steel wire rope (244) is arranged on the surface of the wheel (234), one end of the fourth steel wire rope (244) is fixedly connected to the first left inner sleeve (221), and the other end of the fourth steel wire rope (244) is fixedly connected to the first right inner sleeve (222); a fifth steel wire rope (245) is arranged on the surface of the fifth fixed pulley (235), one end of the fifth steel wire rope (245) is fixedly connected to the second right inner sleeve (224), and the other end of the fifth steel wire rope is fixedly connected to the outer sleeve (21); a sixth steel wire rope (246) is arranged on the surface of the sixth fixed pulley (236), one end of the sixth steel wire rope (246) is fixedly connected to the second left inner sleeve (223), and the other end of the sixth steel wire rope (246) is fixedly connected to the outer sleeve (21); A hydraulic rod (25) is fixedly installed in the outer sleeve (21) near the first right inner sleeve (222), and an oil cylinder (26) is fixedly installed at one end of the hydraulic rod (25). The oil cylinder (26) is located in the first right inner sleeve (222), and the first fixed pulley (231) and the oil cylinder (26) are rotatably connected.

3. A krill fishing device according to claim 1, characterized in that: The front ring net body of the trawl net (50) is installed on the rope-holding ring of the rope, and the rope-holding mechanism (40) has a pullable rope-holding rope built in.

4. A krill fishing device according to claim 1, characterized in that: The release mechanism (60) comprises an outer cylinder (61) and an inner cylinder (62); the inner cylinder (62) rotates inside the outer cylinder (61); an outer release port (63) is provided at the top of the outer cylinder (61); an inner release port (65) is provided at the top of the inner cylinder (62); an inlet (66) is provided at one end of the inner cylinder (62); and a pipe (64) is installed between the inner release port (65) and the inlet (66).

5. A krill fishing device according to claim 4, characterized in that: A plurality of partitions (67) are provided at one end of the inner cylinder (62) close to the inlet (66), and the partitions (67) are of an inner concave rotary vane type.

6. A krill fishing device according to claim 5, characterized in that: The trawl (50) gradually narrows from one end close to the traction plate (11) to one end away from the traction plate (11), the pipe (64) is in an "L" shape, and the long arm end of the pipe (64) is inclined.

7. A krill fishing device according to claim 1, characterized in that: A protective net (30) is fixedly mounted on one end of the trawl net (50) close to the traction plate (11), and a light is fixedly mounted on the surface of the protective net (30).

8. A krill fishing device according to claim 1, characterized in that: A spraying mechanism (80) is arranged in the traction plate (11), and the spraying mechanism (80) comprises a loading box (81) fixedly mounted in the traction plate (11), a push plate (82) slidably connected in the loading box (81) via a spring (85), a magnetic block (84) is fixedly mounted on a side of the push plate (82) close to the spring (85), an electromagnet (83) is fixedly mounted in the loading box (81), a liquid outlet pipe (86) connected to the interior and having a one-way valve is fixedly mounted on one side of the loading box (81), one end of the liquid outlet pipe (86) is close to the propeller (12), and a liquid inlet pipe connected to the interior and having a one-way valve is arranged on the top of the loading box (81).

9. A krill fishing device according to claim 8, characterized in that: A sealing gasket (87) is fixedly mounted on the surface of the push plate (82); the sealing gasket (87) is made of rubber and fits the inner wall of the loading box (81).

10. A krill fishing device according to claim 9, characterized in that: Two symmetrically arranged arc-shaped guide plates (88) are fixedly installed in the liquid outlet pipe (86), and one side of the guide plate (88) is rotatably connected to a swing ball (89) made of rubber material via a torsion spring.

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