Layered net bag type trawl

Abstract

The invention discloses a layered net bag type trawl, and belongs to the technical field of trawl equipment. The layered net bag type trawl comprises a trawl body and a flow guide body, wherein a circular supporting ring is arranged in the trawl body, a fixing rod piece is transversely connected to the middle of the supporting ring, and two ends of the fixing rod piece are connected with the innerring of the supporting ring respectively; the flow guide body is arranged in the trawl body and located on a dorsal side of the fixing rod piece, a columnar body is connected to the middle of the dorsal surface of the fixing rod piece, the flow guide body is a conical net cylinder, the conical top end of the flow guide body is connected with the columnar body through a fourth connecting rope, theconical bottom end of the flow guide body is connected with a coaxial first floating ring, the first floating ring is connected with a connecting net sleeve sleeved with a cylinder, two ports of theconnecting net sleeve communicate with each other, one port is connected with the first floating ring, the other port is connected with a second floating ring, and the inner ring surface of the secondfloating ring is connected with an isolation net piece. According to the layered net bag type trawl, net holes are effectively prevented from being blocked in the trawl process, a juvenile fish escape channel is provided in the trawl, and the trawl has a preliminary separation effect on fishes and shrimps, so that manual sorting time in the later period is shortened.

Description

Technical field [0001] The invention belongs to the technical field of trawl equipment, and in particular relates to a layered net bag type trawl. Background technique [0002] China’s marine fishery resources are very rich, and their characteristics also determine China’s diverse fishing methods, such as trawling, netting, gillnets and many other operations. In order to make the sustainable use of marine fishery resources, different regions have adopted the smallest trawl net. The size of the mesh is standardized. However, when the net is set up, the big fish blocks the escape channel of the small fish, and the big fish and the small fish squeeze each other, even if the trawl that meets the standard requirements has been used, a certain amount of Small fish are caught, causing damage to fishery resources. Therefore, some existing trawl nets are designed with a layered structure, such as figure 1 As shown, the middle part of the existing trawl is separated by the existing separat...

AI Technical Summary

Problems solved by technology

[0002] my country's marine fishery resources are very rich, and its characteristics also determine the various fishing methods in our country, such as trawling, stretching nets, gillnets and many other operating methods. However, when the net is pulled, the big fish blocks the escape channel of the small fish, and the big fish and the small fish squeeze each other. Even if the trawl net that meets the standard has been used, a certain amount of fish will still be caught. Small fish are caught, causing damage to fishery resources. Therefore, a layered structure is designed in some existing trawl nets, such as figure 1 As shown, the middle part of the existing trawl net is separated by the existing separation layer, so that the effective fish or shrimp in the catch caught by the existing trawl net can escape to the protected space through the existing separation layer, but this sacrifices the fishing capacity of the trawl net. Temporary storage space for catches, reducing catches

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