Research On Hydraulic Telescope Grouted Clamps Of The Offshore Platform

This paper is based on the project of the research of the clamp’s strengthening technology of the platform’s underwater structure. This project is authorized by the China National Offshore Oil Corporation and its purpose is to develop the strengthening structure of the ocean platform’s underwater jacket which is used to strengthen the jacket’s fragile points and damaged structure. This paper can provide technical support for the strengthening area of the civil ocean platform.Concerning the status of the underwater clamp’s strengthen technology both in civil and abroad, this paper designed the general planning of the structure of the hydraulic telescopic grouted clamp, including the general mechanical structure, the plan of the hydraulic control system and the grout’s composition proportion.After the integrated design of the clamp’s general mechanical structure, this paper achieved the goal of the automation of the clamp’s closed and locked process and especially resolved the clamp’s self-locking problem. This paper also stated how to seal up the clamp by selecting proper materials and methods.This paper used ANSYS to check the intensity of the locking structure and optimize the fragile points. In this paper, the viability of the clamp’s strengthening structure is verified through the fatigue analysis of the clamp by imitating its underwater working environment. The speed optimization design of the hydraulic cylinder reduces the clamp’s maximum impact force and thus effectively improves the clamp’s structural strength.By introducing the PID controller which controlled the clamp’s opening and closing action accurately in the hydraulic control system, this paper analyzed the synchronism of the two locking hydraulic cylinder’s locking action, realized the hydraulic cylinder’s synchronous movement.