Design And Study Of Emergency Release Device For Offshore Oil Transfer Hose

Emergency release device is one of the important equipment in the process of FPSO crude oil transportation.It can realize the quick connection and separation between the oil hose and the shuttle tanker.The device is mainly composed of the mother joint shutoff valve mechanism,the quick connection,the detachment mechanism,the public joint shutoff valve mechanism and the power mechanism.On the basis of the existing emergency release device,a new type of circumferential uniform claw type emergency release device with passive removal scheme is designed,which increases the reliability of the emergency release device.According to the working process of the emergency release device,the working principle is described in detail,and the key components of the device are designed.The working state of emergency release device is analyzed and the minimum hydraulic driving force is obtained for reliable connection.By using ANSYS software to analyze the influence of different number of claws on the clamping ring,the optimal distribution scheme of circumferential claw is finally determined,and the key components of the emergency release device are simulated and simulated to verify its rationality and optimize its unreasonable points.A new type of combined sealing method is designed to improve the reliability of hydraulic drive system seal,and its rationality is verified by simulation analysis.At the same time,the flow field of the device is analyzed by FLUENT software,the flow characteristics of the flow channel formed by the structure of the new and old shutoff valves are compared and analyzed,and the superiority of the new structure is verified.The optimal distribution position of the shutoff valve structure is determined by analyzing the flow performance of the different flow areas at the throat contraction port;Meanwhile,the influence of different angle,radius and inlet velocity on the erosion of the device is simulated by liquid / solid flow analysis.The results show that the radius of the guide plate is changed,the maximum erosion is changed,the erosion position is unchanged,the erosion rate is the smallest when r=1 m,and the flow state is improved to a certain extent;the reverse angle treatment of the most serious erosion can reduce the erosion wear,and the erosion rate is the smallest when the radius is 60 mm;and the wall surface is slightly worn when the velocity is1-5 m/s;When the velocity of flow is 5-9 m/s,the wear rate increases greatly,and when the velocity of flow is more than 9 m/s,the wall erosion wear increases sharply.It is suggested that the speed of oil transportation should be controlled below 5 m/s as far as possible.By analyzing the working flow of the device,the corresponding hydraulic control system is designed,and the rationality of the design is verified by AMEsim software.