A Calculation Method for Liquid Volume in Tank of Ballast Monitoring System of Floating Offshore Platform

Abstract

A ballast monitoring system for a floating ocean platform and a liquid volume calculation method in a cabin, belonging to the technical fields of ballast water loading and discharge liquid level monitoring for a floating ocean platform and platform draft monitoring. The monitoring system of this floating ocean platform includes four parts: tank liquid level monitoring, four-corner draft monitoring, liquid pipe flow monitoring, and platform inclination monitoring. Since the liquid tank of the floating ocean platform is square, when the platform tilts, the liquid volume in the liquid tank is calculated through the pressure sensors at the four corners of the bilge and the overall heel angle and pitch angle of the platform. The platform draft is calculated by the ultrasonic liquid level gauge. Through the cooperation between the ultrasonic flowmeter installed in the liquid pipe, the dual-axis inclination sensor and the above sensors, the redundant monitoring of the platform's overall inclination angle, draft, and liquid volume in the liquid tank is realized, and the mutual inspection and correction of each monitoring data is realized. Sensor failures can be detected in time. In this way, it is ensured that the complete monitoring of the ballast quantity can still be realized in the case of failure of some sensors.

Description

technical field [0001] The invention relates to a ballast monitoring system of a floating ocean platform and a liquid volume calculation method in a tank, and belongs to the technical fields of ballast water loading and discharge liquid level monitoring of the floating ocean platform and platform draft monitoring. Background technique [0002] The ballast system has the function of adjusting the draft, inclination and stability of ships and offshore platforms. The system changes the floating state of the floating body by adjusting the ballast water to meet the needs of different working conditions (such as towing conditions, loading and unloading cargo, drilling conditions, workover conditions, etc.). Compared with ships, the length and width of the floating platform are larger and the aspect ratio is close to 1. In the case of improper or untimely load adjustment, it is more prone to instability and even cause the platform to capsize. Therefore, in order to ensure the norm...

AI Technical Summary

Problems solved by technology

However, it is very difficult to use and install these sensors reasonably, and ensure that the sensors cooperate with each other to accurately monitor the ballast and floating state information under various working conditions.

[0004] The traditional ballast monitoring system has the following shortcomings: 1. The monitoring accuracy is poor, and it does not have the ability to accurately monitor the liquid volume of the tank when the platform is tilted and the liquid volume when the liquid volume in the tank is small; 2. It does not have continuous accuracy monitoring draft information; 3. There is no mutual verification and redundant monitoring between ballast sensors

These lead to errors in the ballast values ​​measured by the platform. When some sensors fail to monitor relevant ballast information, this will affect the accuracy of the platform's ballast adjustment.

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