CN103264050A

CN103264050A - Control method for preventing roughing mill from miscounting

Info

Publication number: CN103264050A
Application number: CN2013102275216A
Authority: CN
Inventors: 高颖男; 殷敏; 郝利国; 王文杰; 于贺宝; 田春赢
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2013-06-07
Filing date: 2013-06-07
Publication date: 2013-08-28
Anticipated expiration: 2033-06-07
Also published as: CN103264050B

Abstract

The invention relates to the field of reciprocating electric control of a roughing mill, and particularly relates to a control method for preventing a roughing mill from miscounting. The control method is characterized by comprising the following steps of: taking pass counting and bite detection as logic foundation for judging miscount by a roughing mill control system in multi-pass rolling production by the roughing mill with pressure detection; setting the initial pass counting of a rolling mill to be 1; keeping the signal by an S/R trigger when the pass counting is 1 and the rolling mill bites the steel; emitting a pass counting error alarm and the like until the set final pass is the maximal pass of a rolled piece when the pass counting does not timely become 2 within a period of delay time when a steel bite signal of the rolling mill disappears; and finally clearing all signals kept by the S/R trigger by the pass signal, and returning the program. Compared with the prior art, the control method has the beneficial effects that the alarm signal is emitted when the roughing mill in the production process of a hot rolling unit is in an abnormal state; and the roughing mill is reliable in work, and significant and valid in alarm and protection effects.

Description

A kind of control method that prevents the roughing mill miscount

Technical field

The present invention relates to the reciprocal electrical control of roughing mill field, relate in particular to a kind of control method that prevents the roughing mill miscount.

Background technology

The rolling control of roughing mill adopts the reciprocal multi-pass of roughing mill rolling, and this rolling control emphasis is the passage counting that depends on roughing mill, is determined drafts and the mill speed of roughing mill by the passage counting.Passage counting relies on tracking means such as rolling mill speed and pressure detecting because its importance has adopted tight logic in design, but since the control point is more once in a while can the occurrence count mistake.Once the passage counting makes a mistake, serious accidents such as roll breakage will take place in roughing mill.In this case, just need operating personnel's notice high concentration, the miscount of discovery roughing mill passage is stopped at once, and the accident that prevents enlarges.But because the passage miscount is not regular generation, so just press for a kind of control method that can detect the passage miscount automatically.

Summary of the invention

The purpose of this invention is to provide a kind of control method that prevents the roughing mill miscount; establishment passage alert program; increasing the roughing mill passage at the OPS performance monitor reports to the police; when the roughing mill passage does not have normal recordings; on OPS, can jump out 1 warning at once; alert is shut down at once, prevents major accident.

For achieving the above object, technical scheme of the present invention is:

A kind of control method that prevents the roughing mill miscount, carry out in the multi-pass Rolling Production at the roughing mill that has pressure detecting, the roughing mill control system is with passage counting and the decision logic foundation of detection as miscount of nipping, the initial passage counting of milling train is set to 1, when passage counting is 1 and milling train when stinging steel, maintain signal with the S/R trigger, in milling train is stung one period time delay of steel blackout, the passage counting does not in time become 2, then sends the passage miscount and reports to the police; When passage counting is 2 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 1 passage S/R trigger is eliminated, in milling train was stung one period time delay of steel blackout, the passage counting did not in time become 3, then sent the passage miscount and reported to the police, and the like, final pass up to setting is the maximum passage of rolled piece, and the final pass signal is all removed the signal that the S/R trigger keeps, and program is returned.Be 0.5 ~ 2 second described time delay.

Compared with prior art, the invention has the beneficial effects as follows: send alarm signal during roughing mill abnormality in finding hot rolling unit production process, realize that cost is low, Installation and Debugging are easier to, not influenced by facility environment, reliable operation, warning protection effect significant effective.

Description of drawings

Fig. 1 is embodiment of the invention LCP schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:

See Fig. 1, it is a kind of control method embodiment LCP schematic diagram that prevents the roughing mill miscount of the present invention, carry out in the multi-pass Rolling Production at the roughing mill that has pressure detecting, the roughing mill control system is with passage counting and the decision logic foundation of detection as miscount of nipping, rolling with 7 passages is example, and it is as follows that it specifically controls step:

1) the initial passage of milling train counting is set to 1, when the passage counting is 1 and milling train when stinging steel, maintains signal with the S/R trigger, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 2, and the passage mistake in computation is described, then sends the passage miscount and reports to the police;

2) when passage counting be 2 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 1 passage S/R trigger is eliminated, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 3, the passage mistake in computation is described, then sends the passage miscount and report to the police;

3) when passage counting be 3 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 2 passage S/R triggers is eliminated, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 4, the passage mistake in computation is described, then sends the passage miscount and report to the police;

4) when passage counting be 4 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 3 passage S/R triggers is eliminated, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 5, the passage mistake in computation is described, then sends the passage miscount and report to the police;

5) when passage counting be 5 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 4 passage S/R triggers is eliminated, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 6, the passage mistake in computation is described, then sends the passage miscount and report to the police;

6) when passage counting be 6 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 5 passage S/R triggers is eliminated, stinging the steel blackout when milling train postponed in 0.5～2 second, the passage counting does not in time become 7, the passage mistake in computation is described, then sends the passage miscount and report to the police;

7) the 7th passage signal is all removed the signal that the S/R trigger keeps, and program is returned step 1).

Program of the present invention has reliable versatility and operability, can be installed in easily in the control program of OPS performance monitor, and little and concentrated being easy to of procedure quantity write.Be programmed to logical relation, can freely use other language to rewrite, be convenient to join in the various automatic control computers.Can online interpolation use this program to carry out the milling train protection.

When if the roughing mill rolling pass is counted less than 7 passages, return in the corresponding program section and to get final product; When if roughing mill rolling pass number surpasses 7 passages, can increase alert program by above-mentioned principle.

Claims

1. control method that prevents the roughing mill miscount, it is characterized in that, carry out in the multi-pass Rolling Production at the roughing mill that has pressure detecting, the roughing mill control system is with passage counting and the decision logic foundation of detection as miscount of nipping, the initial passage counting of milling train is set to 1, when passage counting is 1 and milling train when stinging steel, maintain signal with the S/R trigger, in milling train is stung one period time delay of steel blackout, the passage counting does not in time become 2, then sends the passage miscount and reports to the police; When passage counting is 2 and milling train when stinging steel, maintain signal with the S/R trigger, the signal that keeps in the 1 passage S/R trigger is eliminated, in milling train was stung one period time delay of steel blackout, the passage counting did not in time become 3, then sent the passage miscount and reported to the police, and the like, final pass up to setting is the maximum passage of rolled piece, and the final pass signal is all removed the signal that the S/R trigger keeps, and program is returned.

2. a kind of control method that prevents the roughing mill miscount according to claim 1 is characterized in that, be 0.5 ~ 2 second described time delay.