CN104384194B - The method avoiding strip edge heater electric burn stainless steel surfaces - Google Patents
The method avoiding strip edge heater electric burn stainless steel surfaces Download PDFInfo
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- CN104384194B CN104384194B CN201410457067.8A CN201410457067A CN104384194B CN 104384194 B CN104384194 B CN 104384194B CN 201410457067 A CN201410457067 A CN 201410457067A CN 104384194 B CN104384194 B CN 104384194B
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- transmission roller
- edge heater
- strip edge
- cold water
- resistance value
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- Control Of Resistance Heating (AREA)
Abstract
The method avoiding strip edge heater electric burn stainless steel surfaces, belongs to metallurgical hot rolling field, arranges hot metal detector, by the signal trace strip steel of hot metal detector in strip edge heater region；When there is no strip steel in hot metal detector measures strip edge heater region, start the insulation resistance value of cold water transmission roller channel in machine process of measurement calculating machine final insulation values of inner cold water transmission roller channel；When insulation resistance value of cold water transmission roller channel in machine is less than 1k Ω, showing that transmission roller channel insulation is low and can not meet heating requirements, strip edge heater does not comes into operation；When insulation resistance value of cold water transmission roller channel in machine is not less than 24.9k Ω, strip edge heater automatically exits from, it is to avoid strip edge heater electric burn stainless steel surfaces.Present invention, avoiding stainless steel surfaces electric burn, it is ensured that stainless steel product quality.
Description
Technical field
The invention belongs to metallurgical hot rolling field.Mainly for 300 being, 400 be rustless steel.
Background technology
In order to avoid Surfaces of Hot Rolled Strip is produced electric burn during strip edge heater work, it is desirable to strip edge heater region
Machinery inner cold water roller-way insulation resistance value have to be larger than more than 1k Ω, otherwise automatically exits from heating strip steel.
It is far longer than 1k Ω owing to the problems such as roller-way Insulation monitoring open lines will also result in resistance, in this case should
Value cannot truly reflect the practical situation of machinery inner cold water roller-way insulation, there is roller-way actual ground connection risk, if using limit
Portion's heater heating strip steel, may be because of the machinery inner cold water roller-way bad electric burn stainless steel surfaces of insulation.
Summary of the invention
The invention aims to avoid to cause because detected resistance is abnormal strip edge heater heating 300 to be, 400 be stainless
Produce surface electric burn during steel, reduce equipment investment and maintenance cost, it is ensured that Surfaces of Hot Rolled Strip quality.
The technical scheme is that the method avoiding strip edge heater electric burn stainless steel surfaces, described rustless steel are
300 be, 400 be rustless steel, hot metal detector is set in strip edge heater region, by the signal of hot metal detector with
Track rustless steel；When having rustless steel in hot metal detector measures strip edge heater region, stop machinery inner cold water delivery roll
Road insulation resistance value process of measurement, the measurement result of hot metal detector is invalid；When hot metal detector measures strip edge heater
When not having rustless steel in region, starting insulation resistance value of cold water transmission roller channel in machine process of measurement, calculating machine inner cold water transmits
The final insulation values of roller-way；When the final insulation values of cold water transmission roller channel in machine is less than 1k Ω, show that transmission roller channel insulation resistance value is low,
Can not meet heating requirements, strip edge heater does not comes into operation；The final insulation values of cold water transmission roller channel in machine is not less than 24.9k
During Ω, show that transmission roller channel insulation resistance value is measured abnormal, it is impossible to true reflection transmission roller channel insulation resistance value situation, there is heating not
Rust steel produces electric burn surface hidden danger, and strip edge heater automatically exits from, it is to avoid strip edge heater electric burn stainless steel surfaces；
Described insulation resistance value of cold water transmission roller channel in machine R={Vi/ (5-Vi) } * 50, in formula: Vi is for cold in measuring machinery
Voltage between upper and lower side, water transmission roller channel end；Carry out 10 20 insulation resistance value of cold water transmission roller channel in machine to calculate, will
The insulation resistance value of cold water transmission roller channel in machine of 10 20 times is added and averages as final insulation values.Hot metal detector uses
France's DELTA(Delta) DC3030 of company；
The present invention is as follows at the experiment effect of Taiyuan Iron and Steel Co. hot continuous rolling factory:
(1) hot-strip strip edge heater controls stable, and steel edge portion steady quality improves, it is to avoid stainless steel surfaces electricity
Wound, it is ensured that stainless steel product quality.
(2) decrease equipment investment, reduce maintenance cost.
(3) Surfaces of Hot Rolled Strip quality is improved significantly, eliminates stainless steel product hidden danger of quality, the direct warp of acquirement
Annual more than 5,580,000 yuan of benefit of Ji.
Detailed description of the invention
Embodiment: rolling 300 is that rustless steel needs to use strip edge heater when heating, by operative employee first man-machine
Select to come into operation on picture strip edge heater, is put into cold water transmission roller channel in machine by computer according to strip tracking signal afterwards exhausted
The measurement of edge resistance controls program.
When there is no strip steel in hot metal detector measures strip edge heater region, start cold water transmission roller channel in machine
Insulation resistance value process of measurement calculating machine inner cold water transmission roller channel insulation values；Insulation resistance value of cold water transmission roller channel in machine is 0.5k
During Ω (less than 1k Ω), showing that transmission roller channel insulation is low and can not meet heating requirements, strip edge heater does not comes into operation；In machinery
When cold water delivery roller-way insulation resistance value is 24.9k Ω (more than 24.5k Ω), show that transmission roller channel insulation measurement is abnormal, it is impossible to true
, there is heating strip steel and produce electric burn surface hidden danger in real reflection transmission roller channel insulation situation, strip edge heater automatically exits from.As long as
There is one of above-mentioned resistance in insulation resistance value of cold water transmission roller channel in machine, and strip edge heater just automatically exits from not carrying out strip steel and adds
Heat, thus avoid strip edge heater electric burn stainless steel surfaces.
Claims (1)
1. the method avoiding strip edge heater electric burn stainless steel surfaces, it is characterized in that described rustless steel be 300 be, 400 be not
Rust steel, arranges hot metal detector, by the signal trace rustless steel of hot metal detector in strip edge heater region；Work as heat
When metal detector has rustless steel in measuring strip edge heater region, stop insulation resistance value of cold water transmission roller channel in machine and measure
Program, the measurement result of hot metal detector is invalid；In hot metal detector measures strip edge heater region the most stainless
During steel, start insulation resistance value of cold water transmission roller channel in machine process of measurement, the final insulation values of calculating machine inner cold water transmission roller channel；
When the final insulation values of cold water transmission roller channel in machine is less than 1k Ω, show that transmission roller channel insulation resistance value is low, it is impossible to meet heating and want
Asking, strip edge heater does not comes into operation；When the final insulation values of cold water transmission roller channel in machine is not less than 24.9k Ω, show transmission
Roller-way insulation resistance value is measured abnormal, it is impossible to true reflection transmission roller channel insulation resistance value situation, there is heating rustless steel and produces electric shock
Hindering surface hidden danger, strip edge heater automatically exits from, it is to avoid strip edge heater electric burn stainless steel surfaces；Described machinery inner cold water passes
Defeated roller-way insulation resistance value R={Vi/ (5-Vi) } * 50, in formula: Vi is for measuring between upper and lower side, cold water transmission roller channel in machine end
Voltage；Carry out 10 20 insulation resistance value of cold water transmission roller channel in machine to calculate, the mechanical inner cold waters of 10 20 times are transmitted
Roller-way insulation resistance value is added and averages as final insulation values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457067.8A CN104384194B (en) | 2014-09-10 | 2014-09-10 | The method avoiding strip edge heater electric burn stainless steel surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410457067.8A CN104384194B (en) | 2014-09-10 | 2014-09-10 | The method avoiding strip edge heater electric burn stainless steel surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104384194A CN104384194A (en) | 2015-03-04 |
| CN104384194B true CN104384194B (en) | 2016-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410457067.8A Active CN104384194B (en) | 2014-09-10 | 2014-09-10 | The method avoiding strip edge heater electric burn stainless steel surfaces |
Country Status (1)
| Country | Link |
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| CN (1) | CN104384194B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7146850B2 (en) * | 2003-07-08 | 2006-12-12 | Chrome Deposit Corporation | Roll contour measuring apparatus and method |
| CN101869916B (en) * | 2009-04-22 | 2012-07-18 | 宝山钢铁股份有限公司 | Band steel non-contact temperature measuring equipment of hot rolling layer cold area and control method thereof |
| CN101625384B (en) * | 2009-08-07 | 2011-03-02 | 山西太钢不锈钢股份有限公司 | Method for measuring insulation resistance value of cold water transmission roller channel in machine |
| KR101400033B1 (en) * | 2012-01-31 | 2014-05-27 | 현대제철 주식회사 | Method and device for reducing defect of hot coil |
| CN103286143B (en) * | 2012-02-27 | 2016-08-24 | 宝山钢铁股份有限公司 | Hot rolling slab Edge Heating Temperature Measure Control method |
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2014
- 2014-09-10 CN CN201410457067.8A patent/CN104384194B/en active Active
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| Publication number | Publication date |
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| CN104384194A (en) | 2015-03-04 |
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