Self-rotating spray head for drag head of dredger

Abstract

The invention discloses a self-rotating spray head for a drag head of a dredger. The self-rotating spray head comprises a rotating head, a rotating shaft assembly, a spray head shell, a jet flow inletand a sealing bush, the rotating head and a rotating shaft are screwed together, the outer part of the rotating head is made of a metal material, and the inner part of the rotating head is of a hollow structure. The rotating shaft assembly is composed of the rotating shaft and a sealing rod and wrapped by the spray head shell, the rotating shaft and the sealing rod are both of a hollow structure,the sealing rod is installed in the rotating shaft, the jet flow inlet of the rotating shaft is fixedly connected with the spray head shell through threads, and the jet flow inlet is of a gradually-shrinking structure and is fixedly connected with the spray head shell through threads. According to the self-rotating spray head, the working efficiency of the dredger is improved, the area of brokendredged objects is larger, the area of working dead angles is reduced, and the drag head is prevented from being blocked.

Description

technical field [0001] The invention belongs to the technical field of dredging devices, and in particular relates to a self-rotating spray nozzle used on a rake head of a dredging ship. Background technique [0002] At present, the trailing suction dredger is dredging while sailing. The dredger drives the rake head to move while the dredger is sailing, and the nozzle installed on the rake head ejects high-pressure water to break the soil, and then passes through the pump. The function is to suck the broken mud into the mud tank, and then throw the mud when the ship sails to the mud throwing area. However, since the nozzles of the dredging ship's rake head are fixed on the rake head, the high-pressure flushing water jets are sprayed out in a fan-shaped distribution, which leads to a blank area between the high-pressure water jets sprayed from two adjacent nozzles, passing through this area The clay inside is relatively less cut, which affects the dredging efficiency, and if...

AI Technical Summary

Problems solved by technology

However, since the nozzles of the dredging ship's rake head are fixed on the rake head, the high-pressure flushing water jets are sprayed out in a fan-shaped distribution, which leads to a blank area between the high-pressure water jets sprayed from two adjacent nozzles, passing through this area The clay inside is relatively less cut, which affects the dredging efficiency, and if the double-layer rake head is used, it will increase the resistance during dredging, and the effect is not ideal

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