SYNCHRONOUS CONTROL METHOD BASED ON SYNCHRONOUS CONTROL SYSTEM FOR LIFTING HYDRAULIC CYLINDERS OF TUNDISH IN CONTINUOUS CASTING

Title:

SYNCHRONOUS CONTROL METHOD BASED ON SYNCHRONOUS CONTROL SYSTEM FOR LIFTING HYDRAULIC CYLINDERS OF TUNDISH IN CONTINUOUS CASTING

Document Type and Number:

WIPO Patent Application WO/2018/233649

Kind Code:

A1

Abstract:

A synchronous control method based on a synchronous control system for lifting hydraulic cylinders of a tundish in continuous casting. In the method, a position deviation that is beyond a set range and that is located between a driving hydraulic cylinder and a driven hydraulic cylinder is corrected by means of a driving and driven hydraulic cylinder synchronous position deviation speed correction unit; if the position deviation between the driving hydraulic cylinder and the driven hydraulic cylinder is beyond a set maximum allowable position deviation, the driving hydraulic cylinder at the higher speed or the driven hydraulic cylinder at the higher speed is controlled to stop moving by means of a driving and driven hydraulic cylinder synchronous position deviation overrun control unit and a driven hydraulic cylinder synchronous position deviation overrun control unit till the position deviation between the driving hydraulic cylinder and the driven hydraulic cylinder is smaller than the set maximum allowable position deviation again; and by means of a driving and driven hydraulic cylinder automatic position holding and control unit, the position deviation of the driving hydraulic cylinder and the driven hydraulic cylinder in absence of manual instructions is prevented. Accordingly, by means of the synchronous control method, synchronous movement of the driving hydraulic cylinder and the driven hydraulic cylinder can be implemented in a case in which the hydraulic cylinders leak, the manufacturing precisions of hydraulic elements are different and loads are nonuniform.

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Inventors:

YE GUANGPING (CN)
WANG GUANGYA (CN)
QIAN XIAOBIN (CN)
WU JIAN (CN)
ZHANG LEJIN (CN)
ZHAN FENG (CN)
WANG ZHIYUAN (CN)
GU ZHONGJUN (CN)
XU HONG (CN)
TANG YINBO (CN)
FANG CHANGDE (CN)
WU SHENG (CN)
XUE FENG (CN)
QIANG ZHIGANG (CN)

Application Number:

PCT/CN2018/092089

Publication Date:

December 27, 2018

Filing Date:

June 21, 2018

Export Citation:

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Assignee:

MAANSHAN IRON & STEEL CO LTD (CN)

International Classes:

F15B11/22; B22D11/18

Foreign References:

CN107314000A	2017-11-03
CN101907109A	2010-12-08
JP2000079452A	2000-03-21

Other References: