Real-time liquid level tracking control method for hydraulic station of hot continuous rolling temper unit

Abstract

The invention relates to liquid level tracking control techniques for hydraulic stations in the hot continuous rolling field and discloses a real-time liquid level tracking control method for a hydraulic station of a hot continuous rolling temper unit. By adoption of the real-time liquid level tracking control method for the hydraulic station of the hot continuous rolling temper unit, the problemsthat according to a liquid level control scheme for a hydraulic station of a temper unit in the prior art, alarm setting is unreasonable, oil leakage events cannot be monitored in time, and energy waste is likely to be caused are solved. According to the real-time liquid level tracking control method for the hydraulic station of the hot continuous rolling temper unit, the permissible liquid leveldeviation value of the hydraulic station is set as the permissible oil leakage quantity, an initial liquid level numerical value is recorded by means of the storage function of a PLC of a hydraulic system after an oil pump of the hydraulic system operates for one minute, and a low liquid level alarm threshold value for alarming of the hydraulic system is obtained by subtracting the permissible oil leakage quantity from the initial liquid level numerical value; and in the operating process of the system, the liquid level of an oil tank of the hydraulic station is acquired in real time and compared with the low liquid level alarm threshold value, and when the real-time liquid level of the oil tank of the hydraulic station is smaller than the low liquid level alarm threshold value, alarm output is triggered to remind an operator to stop a hydraulic pump or to stop the hydraulic pump automatically, and thus the situation that a large quantity of hydraulic oil leaks is avoided.

Description

technical field [0001] The invention relates to a hydraulic station liquid level tracking control technology in the field of hot continuous rolling, in particular to a real-time liquid level tracking control method for a hydraulic station of a hot continuous rolling skin pass unit. Background technique [0002] The hydraulic station of the tempering unit is the hydraulic equipment of the leveling and decoiling unit (such as walking beam conveyor, steel coil trolley, pinch roller, five-roll straightening machine, slitting shear, uncoiler, rewinding machine, coiler, strip pressing Rolls, etc., as well as the auxiliary action of the tempering machine and the roll changing device) provide hydraulic power sources. The system is composed of oil tank, main oil pump, circulation pump, accumulator, cooler, valve table and executive components. The fuel tank of the hydraulic station is equipped with an analog liquid level sensor for continuous measurement of the liquid level of the f...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to propose a real-time liquid level tracking control method for the hydraulic station of the tempering unit in the hot continuous rolling, so as to solve the unreasonable alarm setting in the liquid level control scheme of the hydraulic station of the tempering unit in the traditional technology, and the inability to monitor oil leakage in time events, which are likely to cause energy waste

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