Optimal control method used for single-stepping hydraulic bolt lifting system
A lifting system and optimized control technology, applied in the field of offshore platform lifting systems and lifting systems, can solve the problems of reducing platform operating efficiency and reducing the average lifting speed of the platform, so as to reduce inefficient waiting time, reduce operating costs, and improve operating efficiency Effect
Active Publication Date: 2017-08-18
SHANGHAI HUNTER MARINE EQUIP CO LTD
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042] A specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0043] An optimized control method for a single-step hydraulic bolt-type lifting system, the steps of which are:
[0044] (1) Regroup the platform legs (see Figure 5 ):
[0045] During the operation of the lifting system, within the allowable range of the inclination angle, when any leg is close to the pin position, the control system regroups the legs according to the current position of each leg, and the control system monitors the displacement of the lifting cylinder of each leg. If the displacement difference of the lifting cylinders of multiple piles is within the allowable range, the two or more piles are grouped together and recorded as group A; the other pile legs are recorded as μ group;
[0046] (2) Control the movement of the lifting cylinders of all legs to ensure the synchronization of the movements of each leg:
[00...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
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 for an offshore operating area of an offshore platform, in particular to a control method for a hydraulic bolt-type lifting system, and belongs to the technical field of the offshore platform lifting system. Background technique [0002] The hydraulic pin-type lifting system is suitable for platforms that need frequent lifting and high speed requirements. In the development of the hydraulic pin-type lifting system, single-step, double-step and continuous hydraulic pin-type lifting systems have appeared successively. The single-step hydraulic pin-type lifting system still occupies a large proportion in the hydraulic pin-type lifting system because of its relatively low cost and high cost performance. [0003] The lifting mechanism of the single-step hydraulic bolt-type lifting system is shown in the attached figure 1 . The lifting mechanism is composed of a fixed ring beam 1, a fixed ring beam pin 2, a lift...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More 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