Hammer device for gillnet

Abstract

The invention discloses a weight drop device for a drift net. The weight drop device for the drift net, provided by the invention, is used for effectively solving the problem that sea-floor ecological environment is severely damaged by sea-floor ghost fishing due to the fact that the drift net is very difficult to salvage after the drift net sinks into sea floor. The weight drop device comprises a cylindrical counterweight, of which the upper and lower ends are closed, and an insertion connecting rod, wherein a top plate of the cylindrical counterweight is an iron plate which is easily corroded by seawater, an insertion connecting hole is formed in the middle part of the upper surface of the iron plate, a sealing ring mounting groove is formed in the inner side face of the insertion connecting hole, an inflatable sealing ring is arranged in the sealing ring mounting groove, and an inflating nozzle is arranged on the inflatable sealing ring; and an annular thinning groove is formed in the upper surface of the iron plate, the insertion connecting hole is located at the inner side of the annular thinning groove, first pretension compression springs are arranged in the cylindrical counterweight, the insertion connecting rod is inserted into the insertion connecting hole, and the inflatable sealing ring sleeves the insertion connecting rod.

Description

technical field [0001] The invention relates to a gillnet, in particular to a weight device for the gillnet. Background technique [0002] Gillnet is a rectangular mesh made of one or more layers of plastic filaments, and generally multiple meshes are bonded together. There are multiple floats on the upper edge of the gillnet, and multiple counterweights on the lower edge of the gillnet, so that the gillnet is vertically opened at a position close to the sea level, waiting for fish to swim in and be caught by the net. entangled. [0003] Gillnets are often damaged by the net gear during use and discarded by fishermen in the sea. For these gillnets discarded in the sea, some of the floating balls on the gillnets will fall off and be damaged over time, causing the gillnets to sink to the bottom of the sea under the action of the counterweight; and once the gillnets sink to the bottom of the sea It is very difficult to salvage, causing seabed ghost fishing, which will seriou...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem that gillnet sinks into the seabed, which is very difficult to salvage in the prior art, causing ghost fishing on the seabed, and provides a weight device for gillnet, which can effectively solve the problem of gillnet sinking into the seabed. It is very difficult to salvage, causing ghost fishing on the seabed, which will seriously damage the ecological environment of the seabed

The heavy hammer device for gillnets of this solution can effectively solve the problem that gillnets sink into the seabed and are very difficult to salvage, causing ghost fishing on the seabed, which will seriously damage the ecological environment of the seabed

Images