Large-flow partition-plate-type spraying and flushing device of deepwater trencher

Abstract

A large-flow partition-plate-type spraying and flushing device of a deepwater trencher in the field of special-purpose excavators comprises two axial flow pumps connected in parallel, connecting pipes, a spray pipe and a nozzle. Pump bodies of the two axial flow pumps are arranged with the center lines leaning to the vertical direction, a base is fixed to a frame of a trencher body, outlets are respectively connected with the spray pipe through the connecting pipes, and the tail end of the spray pipe is connected with the nozzle; the connecting pipes comprise a main pipe and two flow dividing pipes, wherein two water inlets of the main pipe are connected with the outlets of the two axial flow pumps respectively, a water outlet in the middle of the main pipe is vertically downwards connected with the spray pipe, two flow dividing water outlets are formed in the portion, located on the two sides of the spray pipe, of the middle of the main pipe and connected with water inlets of a jet propulsion and position control system of the trencher through the two flow dividing pipes respectively. The large-flow partition-plate-type spraying and flushing device of the deepwater trencher can efficiently achieve seabed trenching operation and form smooth conformation with the enough depth.

Description

technical field [0001] The invention relates to a special-purpose device in the field of excavators, in particular to a large-flow clapboard-type spraying device for a deep-water trenching machine. Background technique [0002] Submarine pipelines are the most economical and effective way to transport oil and gas between land and sea. In order to ensure safe operation, they need to be trenched and buried to prevent pipelines from floating or moving sideways. For the water depth conditions and soil strength of most of the buried pipe work areas in China, hydraulic jet trenchers have relatively high operating efficiency and low manufacturing costs, and have been widely used. The jet flushing device generates high-speed jets to impact the sea bed surface to form the trench shape required for the pipeline. It is one of the key technologies that affect the operating efficiency and trench shape quality of the hydraulic jet trencher. [0003] After searching the prior art, it is f...

AI Technical Summary

Problems solved by technology

However, the spray pump of the trenching machine of this technology is directly connected to the nozzle outlet, and the conventional cylindrical nozzle is used. When the flow rate is large, the outlet flow field is not smooth enough and the degree of turbulence is large, which has a certain impact on the trench shape and the construction effect.

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