Ditching device for underwater cable laying and underwater cable laying method

Abstract

The invention belongs to the field of underwater cable laying, and particularly relates to a ditching device for underwater cable laying and an underwater cable laying method.The ditching device comprises a ditching machine and a coulter assembly arranged at the tail of the ditching machine, and the coulter assembly comprises a base connected with the ditching machine, a support arranged on the base and a jet coulter arranged on the support through a driving assembly; a rotary seat is arranged on the base, the support is rotationally arranged on the rotary seat, the driving part drives the support to rotate along the rotary seat, and the locking structure is used for controlling the support and the base to rotate freely or be locked. The plough coulter assembly can freely move under extrusion of two sides of soil, namely freely swing along with an excavated sea ditch, so that a mechanical structure of the plough coulter assembly cannot bear redundant acting force borne by the soil of the sea ditch, and the situation that a trencher and the plough coulter assembly bear too large stress, and consequently mechanical parts are deformed and damaged is effectively avoided.

Description

technical field [0001] The invention belongs to the field of underwater cable laying, and in particular relates to a trenching device for underwater cable laying and an underwater cable laying method. Background technique [0002] During the seabed cable laying operation, when the cable is slightly bent, the vehicle should follow the cable to carry out trenching operations. At this time, if the angle between the spray coulter and the vehicle body is not changed in time, the The coulter under the bed bears the extrusion force of the soil on both sides of the trench and the stress connected with the whole vehicle, which will cause deformation and damage of mechanical parts. At present, it is difficult to control the angle between the vehicle and the jet coulter through calculation. On the one hand, there is no good visual environment underwater for observing the cable direction, digging the trench and the angle relationship between the vehicle. Even if the calculation is carri...

AI Technical Summary

Problems solved by technology

[0002] During the seabed cable laying operation, when the cable is slightly bent, the vehicle should follow the cable to carry out trenching operations. At this time, if the angle between the spray coulter and the vehicle body is not changed in time, the The coulter under the bed bears the extrusion force of the soil on both sides of the trench and the stress connected with the whole vehicle, which will lead to deformation and damage of mechanical parts

At present, it is difficult to control the angle between the vehicle and the jet coulter through calculation. On the one hand, there is no good visual environment underwater for observing the cable direction, digging the trench and the angle relationship between the vehicle. Even if the calculation is carried out, if If the calculation is not ideal, the coulter will still be squeezed and cause damage

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