Emergency stopping system of continuous annealing production line and control method

Abstract

The invention provides an emergency stopping system of a continuous annealing production line and a control method. According to the invention, an emergency stopping system in an annealing region and an exit region is repartitioned, an emergency stopping network is subjected to topological transmission, and a large amount of emergency stopping modules are added, so that the operation and communication reliability of the emergency stopping systems are increased; the emergency stopping acceleration of a transmission frequency converter is optimized and a transmission emergency stopping relay network is redesigned so as to guarantee the safety protection under a machine set emergency stopping condition and prevent strip breakage and steel-heaping accidents, wherein important draught fans andidle rollers of a furnace region are separated from the emergency stopping systems to guarantee the safety of a furnace region under an emergency stopping condition; and an emergency-stopping CPU (Central Processing Unit) is made in Ethernet communication with an online CPU to increase redundancy communication of network communication and hard line communication to realize emergency stopping under the synergistic control of hardware and software, therefore, the reliability and the safety level of the entire emergency stopping system are increased, and reliable emergency stopping protection isprovided for mechanical equipment.

Description

technical field [0001] The invention belongs to the technical field of automatic control, and in particular relates to an emergency shutdown system and a control method thereof for abnormal conditions of a cold rolling continuous annealing unit. Background technique [0002] The emergency stop system is an important part of the control system of the cold rolling continuous annealing unit. Its function is to automatically judge through the system program or stop in time by manual mode when the unit is in personal danger or major equipment failure, so as to avoid the occurrence of accidents or stop the machine in time. Accident losses are minimized. [0003] The emergency stop control system of a 1450mm continuous annealing unit in a cold rolling mill was transformed. In the original design, the emergency stop central processing unit (referred to as CPU) adopts the European Pierce emergency stop PSS series, and the whole line transmission control system adopts the French Alsto...

AI Technical Summary

Problems solved by technology

[0005] One is that the emergency stop information in the original design cannot be saved, and the communication interface only has hard-wired cables, which cannot meet the needs of a large amount of information transmission on site, and there is no spare communication interface between the controllers, and there is no spare communication interface design for the emergency stop of the drive inverter

In the event of Alstom or Siemens processor failure, the coordinated shutdown of the unit cannot be guaranteed, and belt breakage and steel stacking accidents are likely to occur, and there are potential hidden dangers such as equipment failure to power outages according to the protection area.

[0006] The second is that at present, the schemes designed by Pierce emergency stop system at home and abroad often use the fieldbus (DP) communication network as the means of communication between the emergency stop processor and other processors, but because the processors have two major processors, Alstom and Siemens type, the total amount of information transmission after the unified message format cannot meet the requirements of recording emergency stop diagnostic information in the man-machine interface, and the DP communication network of the Alstom processor cannot be expanded, but in order to meet the needs of the emergency stop system, Not only does it require a substantial increase in capital investment, but it also puts forward higher requirements for technology

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