A submarine trenching device

Abstract

The invention discloses a seabed ditching device, which comprises a frame and two ditching mechanisms fixed on the frame with the same structure. The ditching mechanism includes a shell, a hydraulic motor, an impeller and a motor shell. The shell is cylindrical. , one end of the casing is the water inlet, the other end is the water outlet, the water inlet is provided with a water inlet, and the water outlet is provided with a water outlet, the size of the water outlet is smaller than the size of the water inlet, and the motor casing is fixed in the inner cavity of the casing, The space between the motor shell and the shell constitutes a water flow channel, the hydraulic motor is fixed in the motor shell, the impeller is installed on the output shaft of the hydraulic motor, the blade of the impeller is in the inner cavity of the shell, and the shell is provided with a suspension structure at the water inlet . The ditching device uses the rotational impact force of the water flow to ditch the mud and rocks on the seabed. The mud and rocks dug out are mixed with seawater and it takes a while to settle, so that there is enough time for pipe embedding. The ditching device does not directly In contact with seabed mud and rocks, it has a long service life and high ditching efficiency.

Description

technical field [0001] The invention relates to a deep-sea ditching device, in particular to a deep-sea automatic ditching device for laying submarine pipelines. Background technique [0002] The current seabed trenching device is carried out in the form of a furrow. Simply speaking, the current deep-sea trencher uses a marine vehicle to hang a frame through a cable. The frame is provided with a coulter. When in use, the frame Submerged to the bottom of the sea, the marine vehicle then provides a traction force to the frame so that the frame advances and the coulters perform a ditching action on the bottom of the sea. This structure has the following disadvantages: 1. Since the coulter is used, the depth and width of the ditch cannot be too large due to the size of the coulter; As it wears out, the coulters are easily damaged and need to be replaced frequently. 3. The coulter turns the mud and rocks in the ditch to both sides of the ditch when it is ditching, so that becau...

AI Technical Summary

Problems solved by technology

This structure has the following disadvantages: 1. Since the coulter is used, the depth and width of the ditch cannot be too large due to the size of the coulter; It wears out, the coulters are easily damaged and need to be replaced frequently

3. The coulter will turn the mud and rocks in the ditch to both sides of the ditch when ditching, so that because the whole ditching device is moving, it is easy to generate water flow, so that the soil on both sides of the ditch will have a good ditch. Burial, resulting in trenching failure, affecting the subsequent buried pipe embedding

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