CN101684509B - Method for preventing converter from dumping steel - Google Patents

Abstract

The invention relates to the technical field of steel-making automation, in particular to a method for preventing a converter from doumping steel. Through the control of a PLC, the steel dumping prevention is realized by carrying out corresponding blocking on the gear positions of second, third and fourth gears of a dumping controller of the converter, a numerical controller enabling and switching-off ports; when a system carries out the sampling and slagging of a rocking furnace in front of the converter or when an angle goes to steel tapping area behind the converter, the enabling signals of the dumping second, third and fourth gears are blocked from transmitting to the numerical controller, so that the converters in the two areas only can work at first-gear speed, no matter which gears the controller is set at; during sampling in front of the converter or tapping steel behind the converter, when reaching a certain angle point in a heavy state, the converter is prevented form turning down. The invention has the advantages that the technology can control steel making operation completely, automatically realize safe linkage of converter rotating, turning down and tapping, achieve a safe and effective automatic operation, and avoid production accidents caused by steel-making disoperation, instead of equipment faults.

Description

A kind of method of preventing converter from dumping steel

Technical field

The present invention relates to make steel technical field of automation, is a kind of method of preventing converter from dumping steel.

Background technology

Converter steelmaking process grate operational danger is very high, and the precision of equipment and operator's quality are all had very high requirement, and carelessness is arranged in operation slightly, will lead to and spill the steel accident, causes serious equipment and security incident.Usually, owing to operator's violation operation or mishandle also are to cause one of reason that accident takes place, how avoiding the generation of accident, is the problem that we need solve emphatically.

Summary of the invention

For addressing the above problem, the present invention provides a kind of method of preventing converter from dumping steel, and this method is controlled through PLC, the steel accident of spilling that can effectively avoid artificial mishandle to cause.

For realizing above-mentioned purpose, the present invention realizes through following technical scheme:

A kind of method of preventing converter from dumping steel, this method be through PLC control, enables, opens a sluice gate port through unit two, three that converter is tumbled, fourth gear gear, digital control implement and carry out corresponding blocking and realize anti-down steel; System comprises PLC equipment, converter angle detection device, the direct current speeder of tumbling; When system started, the PLC program began to detect the converter angle, during stokehold sampling slagging grate; When angle forwards stokehold resample area point to; The action of tumbling of PLC program output signal is blocked, and will tumble two, three, the fourth gear enable signal blocks, and makes it can not be sent in the digital control implement; When same angle forwards behind the stove tapping zone to; Blockade two, three equally, fourth gear speed; Make the converter in these two zones no matter operate which gear unit is placed on, when behind the sample circuit stove of stokehold, tapping with the moving stove of first gear speed; When converter arrives certain angle points under heavy jar state, will be limited to continue to fall stove.

During stokehold sampling slagging grate, when converter got into stokehold 70 degree to 90 degree zones, converter can only be rotated with first gear speed; When spending above 90, converter will stop to travel forward.

When tapping grate behind the stove, when-79 degree to-95 degree were regional behind the converter entering stove, converter can only be rotated with first gear speed; When spending above-95, converter will stop to travel forward.

Compared with prior art, the invention has the beneficial effects as follows:

This technology can be controlled the steel-making operation fully; Automatically realize that converter falls the safety interlocking of links such as stove and tapping; Realize a kind of " fool " safely and effectively operation; Through PLC control, tumble unit two, three, fourth gear gear, digital control implement of converter enabled, opens a sluice gate port and carry out corresponding blocking and realize anti-down steel; The mishandle of can avoiding fully making steel causes non-equipment failure industrial accident.

Description of drawings

Fig. 1 is a schema of the present invention.

Embodiment

This system mainly is made up of several parts such as PLC equipment, converter angle detection device, the direct current speeders of tumbling, is controlled by the PLC program.It is the trigger point that system operation is converted the iron signal through converter, in whole smelting cycle, starts this interlock protection, and the ends with system operation clicks with operator that " disengage button " is instruction in the HMI picture, and the start and stop of total system are simple and convenient.

The converter smelting cycle begins to convert iron, to the end that finishes of tapping, in this cycle; Converter is to rotate with heavy jar form; Therefore the important step of operation is just in this cycle, and the careless and violation in any point in the operation all will lead to the serious molten steel accident that leaks.Before the iron operation was converted in converter, operator need press " converting iron " button, and this moment, this securing system started; Simultaneously provide prompting at the HMI picture; Informing that operator should protect starts, in the smelting cycle, during stokehold sampling slagging grate; When converter got into stokehold 70 degree to 90 degree zones, converter can only be rotated with first gear speed; Surpass 90 when spending, converter will stop to travel forward, under this two states, and grate backward, and do not receive a grade speed control system.In the smelting cycle, when tapping grate behind the stove, when-79 degree to-95 degree were regional behind the converter entering stove, converter can only be rotated with first gear speed; Surpass-95 when spending (when angle is bigger), converter will stop to travel forward, under this two states, and grate backward, and do not receive a grade speed control system.This protection in other regional grates with unrestricted, free to rotate.

This method enables tumbling in the digital control implement of tumbling through PLC control simultaneously, opens a sluice gate to wait port to carry out corresponding blocking; Operator start this system; The PLC program begins to detect the converter angle; Oxygen blast finishes the operation of beginning grate, and when converter angle in stokehold got into resample area position, stokehold, PLC program output signal was tumbled to move and blocked; To tumble two, three, the fourth gear enable signal blocks, and makes it can not be sent in the digital control implement; When stove rear converter angle gets into the tapping regional location, block two, three equally, fourth gear speed, no matter these two zones operate unit is placed on any gear is operated, can only be with the first gear speed grate.When behind the sample circuit stove of stokehold, tapping; When converter arrives certain angle position under heavy jar state; To be limited to continue grate; This moment the PLC program will block in the direct current speeder of tumbling one, two, three automatically, fourth gear enables and open a sluice gate signal port, makes direct current speeder can not receive any action command, the operation this moment unit of tumbling also can't shake converter.After whole smelting cycle finished, operator can click " disengage button " in the HMI picture, removed and should protect, thereby accomplish period protection one time.

Claims (1)

1. the method for a preventing converter from dumping steel is characterized in that, this method is through PLC control, enables, opens a sluice gate port through unit two, three that converter is tumbled, fourth gear gear, digital control implement and carry out corresponding blocking and realize anti-down steel; System comprises PLC equipment, converter angle detection device, the direct current speeder of tumbling; When system started, the PLC program began to detect the converter angle, when oxygen blast finishes the operation of beginning grate; When angle forwards stokehold resample area point to; The action of tumbling of PLC program output signal is blocked, and will tumble two, three, the fourth gear enable signal blocks, and makes it can not be sent in the digital control implement; When same angle forwards behind the stove tapping zone to; Blockade two, three equally, fourth gear speed; Make the converter in these two zones no matter operate which gear unit is placed on, when behind the sample circuit stove of stokehold, tapping with the moving stove of first gear speed; When converter arrives certain angle points under heavy jar state, will be limited to continue to fall stove;

During stokehold sampling slagging grate, when converter got into stokehold 70 degree to 90 degree zones, converter can only be rotated with first gear speed; When spending above 90, converter will stop to travel forward;

When tapping grate behind the stove, when-79 degree to-95 degree were regional behind the converter entering stove, converter can only be rotated with first gear speed; When spending above-95, converter will stop to travel forward.

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