Large dustpan-shaped lift net cod end and tying method thereof

Abstract

The invention discloses a large dustpan-shaped lift net cod end and a tying method. The problems that the load borne by an existing cod end mesh is low due to the fact that side seams are connected mesh to mesh in the mode of tying knots around the seams, and the netting gear shape is influenced due to the fact that connection is conducted by adopting belly lines are solved. The tying method comprises the steps that isosceles trapezoidal cod end meshes are manufactured by selecting polyethylene net line-woven nets; long-strip-shaped border net meshes are manufactured by selecting knotless nets woven by polyester net lines; the cod end meshes are arranged in an enclosing mode, and each border net mesh is arranged between every two adjacent cod end meshes; the side edges of the border net meshes and the cod end meshes which are adjacent are seamed and connected according to a preset net mesh size in the mode of tying the hard knots around the seams mesh by mesh by adopting three-ply polyethylene braided ropes as connecting ropes; the seamed border net meshes are tied up with flat knots according to certain spacing by adopting eight-ply polyethylene braided ropes as tying ropes. Accordingly, the border net meshes achieve both a protection effect and a belly line effect on the cod end meshes and bear high stress loads; the border net meshes are tied up with the flat knots and held together, certain flexibility is achieved, and the cod end keeps a good shape in water.

Description

technical field [0001] The invention relates to netting by knotting filament raw materials, in particular to a large-scale dustpan-shaped net bag and a binding method. Background technique [0002] Skip net laying refers to laying the net horizontally in the water in advance, waiting for, luring or driving the fishing object to enter the top of the net, and quickly bringing the net out of the water to catch the catch. It is a kind of net gear in my country's marine fishery One of the fishing gear. The dustpan net is composed of four parts: the wall net, the abdominal net, the net bag and the upper bottom edge net. Named after the dustpan; the mesh bag is located at the back of the wall net and is used to collect the catch. Among them, the nets of the wall net, abdominal net, and net pocket are attached to the upper and lower classes, and the mesh pocket is the smallest, while the rest of the mesh is larger. [0003] With the development and utilization of fishery resources...

AI Technical Summary

Problems solved by technology

The side seams between the mesh bags of the existing small and medium-sized nets are generally knotted by eye-to-eye. This connection method is used on large-scale net bag meshes, which cannot ensure that the mesh bags are full of fish. The force load when harvesting; traditional trawl nets use a force line (steel rope or polyethylene rope, etc.) However, this assembly method causes the cylindrical shape of the large-scale net to change, which affects the fishing effect of the large-scale net.

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