A deep-sea cable retracting hydraulic system

Abstract

The present invention proposes a deep-sea cable retracting hydraulic control system, including: a hydraulic source, the outlet of which is connected to a main pipeline; a reel drive circuit for controlling and driving the reel, which is connected to the main pipeline; control and drive pulleys a pulley drive circuit connected to the main pipeline and arranged in parallel with the reel drive circuit; The cylinder drive circuits are arranged side by side. The hydraulic system can be safely and reliably applied in deep sea to realize the function of releasing and recovering the mooring cable, and effectively control the tension and retracting speed of the mooring cable.

Description

technical field [0001] The invention relates to the technical field of deep sea hydraulics, in particular to a hydraulic system for retracting and releasing deep sea cables. Background technique [0002] Underwater robots have become an important tool for ocean development, especially deep sea development. The existing cable remote control robot ROV (Remotely Operated underwater Vehicle) has the advantages of high power, short control delay, safety and reliability. However, the working water depth of deep-sea ROV is large, and the length of its supporting umbilical cable is very long. Usually, the umbilical cable required for ROV with an operating water depth of 3,500m should reach more than 4,000m, and the umbilical cable for an ROV with an operating water depth of 6,000m even needs to reach 7,000m. In addition, long-distance power transmission in the deep sea will cause a large voltage drop. In order to reduce the voltage drop, the general practice is to thicken the wires...

AI Technical Summary

Problems solved by technology

However, in this method of maintaining a constant tension of the mooring cable by adjusting the overflow pressure of the overflow valve, the overflow valve is always in an overflow state during the operation, resulting in significant heating of the system and large energy consumption

And there is no second set of protection measures, if the hydraulic motor relief valve fails, the maximum tension value of the wire rope cannot be controlled, and there is a risk of the wire rope being broken due to overload

Furthermore, the device has no anti-overspeed function. When the cable is unwound, the drag of the external load will make the reel rotate faster, causing the hydraulic motor to overspeed and suck air, which poses a safety hazard.

In addition, the device is a hydraulic winch suitable only for use on deck and cannot be applied underwater

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