Optimal control method for single-step hydraulic bolt lift system
A lifting system and optimized control technology, applied in the field of lifting system and offshore platform lifting system, can solve problems such as reducing the operating efficiency of the platform, reducing the average lifting speed of the platform, etc., so as to reduce the inefficient waiting time, reduce the operation cost, and improve the operation efficiency. Effect
Active Publication Date: 2018-12-04
SHANGHAI HUNTER MARINE EQUIP CO LTD
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Problems solved by technology
[0021] In the actual situation, the probability of working condition 3 is the highest, which greatly reduces the average lifting speed of the platform and reduces the operating efficiency of the platform
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[0042] A specific embodiment of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0043] An optimized control method for a single-step hydraulic latch type lifting system, the steps are:
[0044] (1) Regroup the platform legs (see Figure 5 ):
[0045] During the operation of the lifting system, within the allowable range of inclination, when any leg is close to the latch position, the control system regroups the legs according to the current position of each leg, and the control system monitors the displacement of each leg lifting cylinder, any two piles Or if the displacement difference of the lifting cylinders of multiple piles is within the allowable range, group the two or more piles into a group and record it as group A; record the other pile legs as group μ;
[0046] (2) Control the movements of the lifting cylinders of all the legs to ensure the synchronization of the movements of the legs:
[0047] Take 4 legs as a...
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The invention relates to an optimal control method used for a single-stepping hydraulic bolt lifting system. The optimal control method includes the steps that platform pile legs are grouped again, in the running process of the lifting system and in the allowed inclination range, when any pile leg gets close to the bolt position, the pile legs are grouped again by the control system according to the current pile leg positions, a control system monitors displacement of all pile leg lifting oil cylinders, the displacement difference of any two-pile or multi-pile oil cylinders is in the allowed range, two piles or multiple piles are grouped into one group which is recorded as the A group, and other pile legs are recorded as the mu group; and secondly, the lifting oil cylinders of all the pile legs are controlled to act, and synchronism of movement of the pile legs is ensured. Due to the fact that pile leg grouping is optimized, the waiting time for fixed ring beam bolt inserting, movable ring beam bolt pulling, lifting oil cylinder returning, movable ring beam bolt inserting and fixed ring beam bolt re-pulling of other pile legs is shortened during fixed ring beam bolt inserting of a certain pile leg in the lifting process; and the low-efficiency waiting time of a platform in the lifting process can be effectively shortened, and therefore the work efficiency of the platform is improved.
Description
Technical field [0001] The invention relates to a lifting system of an ocean platform in a working area at sea, in particular to a control method of a hydraulic bolt type lifting system, belonging to the technical field of ocean platform lifting systems. Background technique [0002] The hydraulic bolt type lifting system is suitable for platforms that require frequent lifting and higher speed requirements. In the development of hydraulic bolt lifting systems, single step, double step and continuous hydraulic bolt lifting systems have appeared successively. The single-step hydraulic bolt type lifting system still occupies a large proportion in the hydraulic bolt type lifting system due to its relatively low cost and high cost performance. [0003] See the attachment for the lifting mechanism of the single step hydraulic bolt lifting system figure 1 . The lifting mechanism is composed of a fixed ring beam 1, a fixed ring beam pin 2, a lifting cylinder 3, a movable ring beam 4, a m...
Claims
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IPC IPC(8): E02B17/08
CPCE02B17/0809
Inventor 季国良张兴恩洪超徐军郑建
Owner SHANGHAI HUNTER MARINE EQUIP CO LTD