A structure and method for controlling the opening and closing of trawl nets by using unmanned ships

An unmanned boat and trawling technology, applied in the field of trawling, can solve the problems of difficult adjustment and control of the opening of the trawling net, and achieve the effects of convenient trawling, easy control, and convenient adjustment of the opening size.

Active Publication Date: 2020-03-17
MARINE FISHERIES RES INST OF ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention overcomes the disadvantage that the opening size of the trawl net mouth is not easy to adjust and control, and provides a structure and method for controlling the opening and closing of the trawl net by using an unmanned ship. The opening size of the trawl net mouth is easy to adjust and control, which greatly facilitates trawl fishing

Method used

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  • A structure and method for controlling the opening and closing of trawl nets by using unmanned ships
  • A structure and method for controlling the opening and closing of trawl nets by using unmanned ships
  • A structure and method for controlling the opening and closing of trawl nets by using unmanned ships

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Embodiment 1

[0036] Embodiment 1: A structure that utilizes unmanned ships to control the opening and closing of trawl nets (see attached figure 1 to attach Figure 5 ), including a trawl 1, a net plate 2, and an unmanned ship 3. The left and right sides of the trawl net are connected to the rear end of a net plate through a pull rope 46, and a net plate corresponds to an unmanned ship. The net plate is in an arc structure, and the net plate It includes the stencil base 4, the inner slide 5 and the outer slide 6 which can slide back and forth on the stencil base, the inner slide and the outer slide are attached to the inner and outer sides of the stencil base respectively, and several rows of bases are arranged on the stencil base The flow holes 7 and the flow holes of the base body are arranged in a rectangular array. There are a number of flow holes 8 on the inner plate corresponding to the flow holes of the base body. The coincidence and staggering of the flow holes of the plate, a row...

Embodiment 2

[0042] Embodiment 2: A structure that utilizes unmanned ships to control the opening and closing of trawl nets (see attached Figure 6 to attach Figure 9 ), its structure is similar to that of Embodiment 1, the main difference is that in this embodiment, a T-shaped chute 30 is provided on the rear end surface of the stencil substrate, and T-shaped connecting columns 31 can be slidably inserted into both ends of the chute, and the sliding The two ends of the groove are connected with limit plugs. Lock bolts 32 are installed on the net plate substrate near the two ends of the chute, and a guide surface 33 inclined to the side of the connecting column is provided on the dead bolt. The rear end of the base body is provided with a rear guide rope seat 45 near the middle position, the front end of the screen substrate is provided with a front guide rope seat 34 near the middle position, the rear guide rope seat is provided with a T-shaped rear guide rope hole 35, and the front gui...

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Abstract

The invention discloses a structure and method of using unmanned ships for controlling a trawl to be opened and closed and aims to solve the problem that the size of a net opening of the trawl is difficult to adjust and control. During trawling, the trawl is placed in a fishing water area first, the distance between the two unmanned ships is greater than the horizontal width of the trawl, the unmanned ships pull net plates to move forward through trawl ropes, correspondingly the trawl is driven to move forward, and the net plates are expanded outward under the action of water flow resistance in order to open the net opening of the trawl. When it is necessary to expand the horizontal opening of the trawl, outer plate adjusting ropes pull outer sliding plates to slide forward to reduce the overlapping area of base flow passage holes and throughflow slotted holes and increase the resistance of the water flow to the net plates, so that the net plates are further expanded outward, and correspondingly the size of the opening of the trawl is increased. When it is necessary to further expand the horizontal opening of the trawl, inner plate adjusting ropes pull inner sliding plates to slideforward, and the base overflow holes and inner plate overflow holes are completely staggered to increase the resistance of the water flow to the net plates, so that the net plates are further expanded outward, and therefore the size of the opening of the trawl is increased.

Description

technical field [0001] The invention relates to trawling fishing technology, more specifically, it relates to a structure and method for controlling the opening and closing of the trawling net by using an unmanned ship. Background technique [0002] Trawling is a fishing operation method that uses a fishing boat to tow a bag-shaped net to force the fishing target into the net. It can actively and flexibly drag fish groups. It is mainly used in the ocean, and it is also used in inland waters. The fishing target is the bottom and near-bottom fish, shrimp and molluscs, such as cod, herring, hairtail, horse-faced puffer, large yellow croaker, small yellow croaker, squid, calamari, flounder, shrimp, crab and inland waters Qinghai Lake naked carp, sword anchovy, whitebait, white shrimp, etc. Trawling is one of the most important fishing methods in modern times. In the process of trawl fishing, the opening size of the trawl net needs to be adjusted. At present, the commonly used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B63B35/16B63B35/18B63B35/00A01K73/02
Inventor 朱文斌
Owner MARINE FISHERIES RES INST OF ZHEJIANG
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