CN107175261B - A kind of online test method of hot-strip working roll cooling work state - Google Patents
A kind of online test method of hot-strip working roll cooling work state Download PDFInfo
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- CN107175261B CN107175261B CN201710427871.5A CN201710427871A CN107175261B CN 107175261 B CN107175261 B CN 107175261B CN 201710427871 A CN201710427871 A CN 201710427871A CN 107175261 B CN107175261 B CN 107175261B
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- working roll
- cooling water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
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- Control Of Metal Rolling (AREA)
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Abstract
A kind of online test method of hot-strip working roll cooling work state, belongs to hot strip rolling mill detection method technical field, carries out on-line checking for the working roll cooling work state to hot strip rolling mill.Its technical solution is: not closing cooling water of working roll after milling train parking, the working roll for keeping the cooling water of working roll sustained firing of operating pressure static, working roll roll surface generates one layer of uniform and thin rufous rusty scale quickly under the oxidation of cooling water, but the part directly impacted of cooling water of working roll is almost without the oxidation rusty scale of rufous, the impact trace that cooling water of working roll can be identified easily on the roll surface of rufous, according to impact trace it may determine that the working condition of cooling water of working roll.Detection method of the invention is simple and easy to do, and can the working roll synchronously to production line institute organic frame detect, substantially reduce detection time, solve the problems, such as that existing detection method time is long, costly, there is significant economic benefit.
Description
Technical field
The present invention relates to a kind of online convenient detection methods of the working roll cooling work state of hot strip rolling mill, belong to
Hot strip rolling mill detection method technical field.
Background technique
In the production process of hot-strip, the quality of the working roll cooling work state of strip mill is to influence hot-rolled strip
Steel produces a key factor.Situations such as cooling water of working roll mouth is if there is blocking, excessive wear, unreasonable deflection angle,
Working roll be will lead to along the inhomogeneous cooling in body of roll direction, thus cause work roll thermal roll shape curve and occur being mutated and partial oxidation film
Situations such as falling off has a major impact the quality of strip, and aggravates the abrasion of working roll, influences service life.
The detection currently, method for checking working roll cooling work state is mainly stopped.It closes and rolls after milling train parking
Roller cooling water extracts working roll out out of rack, and staff enters in rack checks whether cooling water nozzle has blocking etc. one by one
Situation.On the one hand the method cannot effectively determine the installation deviation of water nozzle excessive wear or deflection angle, pass through in actual production
Often cause production, quality problems, on the other hand substantially prolongs detection time, affect being carried out continuously for production.
China Patent No. CN200810041724.5 discloses a kind of detection method of roll cooling water actual use situation.
This method is coated firstly the need of by the painting of offline roll, and roll is packed into rack when coating is half-dried, opens roll cooling water
A few minutes are sprayed, roll is extracted out later according to roll surface coating and peels off the working condition that situation judges roll cooling water.This method
It is uneconomical, not easy although working well, when especially detecting multiple racks, needs to apply to multiple groups roll and coat, or
Using one group of roll, brushing paint carries out repeated detection repeatedly.Meanwhile this method is also required to implement under shutdown status, influences
The case where production is carried out continuously is not efficiently modified.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of online inspections of hot-strip working roll cooling work state
Survey method, this detection method can cooling work state to hot-strip working roll carry out on-line checking, detection method letter
Just, and can the working roll synchronously to production line institute organic frame detect, substantially reduce detection time.
The technical solution for solving above-mentioned technical problem is:
A kind of online test method of hot-strip working roll cooling work state, it is carried out using following steps:
A. after milling train parking, cooling water of working roll is not closed, and continues to keep operating pressure sustained firing；
B. the time of cooling water of working roll sustained firing are as follows:
Roll surface is not present the working roll of dense oxidation film, time >=2 minute of cooling water of working roll sustained firing；
For roll surface, there are the working roll of dense oxidation film, time >=10 minute of cooling water of working roll sustained firing；
C. close cooling water of working roll, extraction working roll simultaneously dries, observe work roll surface due to cooling water oxidation
The rufous that effect generates aoxidizes rusty scale, and the percussion mark of cooling water of working roll is distinguished according to the distribution situation that rufous aoxidizes rusty scale
Mark judges the working condition of cooling water of working roll according to impact trace.
The online test method of above-mentioned hot-strip working roll cooling work state, when cooling water of working roll strike trace is aobvious
When showing following state, illustrate that cooling water of working roll mouth is normal, keep existing cooling water of working roll mouth state: (1) hitting trace
Marshalling, deflection angle are normal；(2) trace is complete；(3) trace does not have wide, too long.
The online test method of above-mentioned hot-strip working roll cooling work state, when cooling water of working roll strike trace is bright
Show wide, too long, or strike trace illustrates that cooling water of working roll mouth is worn when broadening extremely or is elongated, replacement abrasion immediately
Water nozzle.
The online test method of above-mentioned hot-strip working roll cooling work state, when cooling water of working roll hits trace trace
When mark is imperfect, illustrate that water nozzle blocks, the foreign matter cleared up in water nozzle immediately replaces water nozzle when cannot such as clear up immediately.
The online test method of above-mentioned hot-strip working roll cooling work state, as cooling water of working roll strike trace row
Arrange irregular, individual trace deflection angles are bigger than normal or individual trace deflection angles are less than normal, illustrate cooling water of working roll mouth established angle
Degree just, does not adjust the deflection angle of water nozzle accordingly according to the angle deviating situation that strike trace is shown.
The beneficial effects of the present invention are:
The present invention does not close cooling water of working roll after milling train parking, and the cooling water of working roll of operating pressure is kept persistently to spray
Static working roll is penetrated, working roll roll surface generates one layer of uniform and thin rufous rust quickly under the oxidation of cooling water
Layer, but the part directly impacted of cooling water of working roll is almost without the oxidation rusty scale of rufous, when closing cooling water of working roll
Afterwards, clearly cooling water of working roll strike trace is just shown on the roll surface for the presentation rufous dried.Just according to strike trace
Can determine whether whether correct, water nozzle has situations such as blocking and excessive wear to cooling water of working roll mouth setting angle.
The present invention is a kind of method of pioneering on-line checking hot-strip working roll cooling work state, this method root
The impact trace that cooling water of working roll can be identified easily according to the oxidation rusty scale shape of the rufous on roll surface, according to impact
Trace it may determine that cooling water of working roll working condition.This detection method is simple and easy to do, and can be synchronously to production
The working roll of line institute organic frame is detected, and detection time is substantially reduced, and solves existing detection method time length, personnel
More, costly problem has significant economic benefit, in industry there is fabulous popularizing value.
Detailed description of the invention
Fig. 1 is use state diagram of the invention；
Fig. 2 is strike trace figure when cooling water of working roll mouth is normal；
Strike trace figure when Fig. 3 is the abrasion of cooling water of working roll mouth；
Strike trace figure when Fig. 4 is the abrasion of cooling water of working roll mouth；
Strike trace figure when Fig. 5 is the blocking of cooling water of working roll mouth；
Strike trace figure when Fig. 6 is the blocking of cooling water of working roll mouth；
Fig. 7 is the strike trace figure of cooling water of working roll mouth setting angle not timing；
Fig. 8 is the strike trace figure of cooling water of working roll mouth setting angle not timing.
It is marked in figure as follows: top working roll 1, bottom working roll 2, entrance side top working roll cooling water 3, entrance side bottom working roll
Cooling water 4, outlet side top working roll cooling water 5, outlet side bottom working roll cooling water 6.
Specific embodiment
The principle of the online test method of hot-strip working roll cooling work state of the invention is:
In process of production, the oxidation of cooling water makes the oxidation rusty scale of roll surface one layer of rufous of generation of working roll,
But the part that cooling water of working roll directly impacts is almost without the oxidation rusty scale of rufous, it can be easily on the roll surface of rufous
The impact trace for identifying cooling water of working roll, according to impact trace it may determine that the working condition of cooling water of working roll.
Further, since with the roll surface of working roll oxidation occurs for cooling water of working roll always in milling train production process,
Working roll is in the working conditions such as high temperature, high stress, vapor, and Wiper blade continues scraping work roller roll surface, so work
The oxidation of roller surface mainly generates one layer of wear-resisting oxidation film.In milling train parking, working roll stationary state, sustained firing
Cooling water of working roll continue with roll surface occur oxidation.Higher roller temperature and internal stress accelerate the speed of oxidation, and roll surface can
To be quickly generated uniform and thin rufous rusty scale.If roll surface has fine and close oxidation film, oxidation film will seriously hinder work
The oxidation rate of roller cooling water, in order to form cognizable rufous rusty scale, cooling water of working roll on the roll surface for have oxidation film
The time of sustained firing needs to extend.
It is shown in figure, milling train of the invention has top working roll 1 and bottom working roll 2, has on entrance side in the entrance side of milling train
Cooling water of working roll 3, entrance side bottom working roll cooling water 4, the outlet side of milling train have outlet side top working roll cooling water 5, go out
Mouth side bottom working roll cooling water 6.
This method is carried out using following steps:
A. after milling train parking, cooling water of working roll is not closed, and continues to keep operating pressure sustained firing；
B. the time of cooling water of working roll sustained firing are as follows:
Roll surface is not present the working roll of dense oxidation film, time >=2 minute of cooling water of working roll sustained firing；
For roll surface, there are the working roll of dense oxidation film, time >=10 minute of cooling water of working roll sustained firing；
C. close cooling water of working roll, extraction working roll simultaneously dries, observe work roll surface due to cooling water oxidation
The rufous that effect generates aoxidizes rusty scale, and the percussion mark of cooling water of working roll is distinguished according to the difference situation that rufous aoxidizes rusty scale
Mark judges the working condition of cooling water of working roll according to impact trace.
In the method, at the position that cooling water of working roll directly sprays, the constant impingement of high pressure water flow leads to iron oxide
Rust is constantly washed, and after closing cooling water of working roll, just shows clearly work on the roll surface for the presentation rufous dried
Make roller cooling water strike trace.Staff can be clear and direct from following different cooling water of working roll strike trace
Judge the working condition of cooling water of working roll.
1. illustrating that cooling water of working roll mouth is normal when cooling water of working roll strike trace shows following state, keeping existing
Some cooling water of working roll mouth states: (1) hitting trace marshalling, and deflection angle is normal；(2) trace is complete；(3) trace does not have
Have wide, too long.
2. when cooling water of working roll strike trace is obvious wide, too long, or when strike trace broadens extremely or is elongated, explanation
The abrasion of cooling water of working roll mouth, replaces the water nozzle of abrasion immediately.
3. illustrating that water nozzle blocks when cooling water of working roll strike trace trace is imperfect, clearing up immediately different in water nozzle
Object replaces water nozzle when cannot such as clear up immediately.
4. when cooling water of working roll strike trace is misaligned, individual trace deflection angles are bigger than normal or the deflection of individual traces
Angle is less than normal, illustrates that cooling water of working roll mouth setting angle just, is not adjusted accordingly according to the angle deviating situation that strike trace is shown
The deflection angle of whole water nozzle.
Table 1 below is cooling water of working roll strike trace shape of the invention, the state of cooling water of working roll mouth, judgement
Standard and treatment measures.
Table 1
Claims (5)
1. a kind of online test method of hot-strip working roll cooling work state, it is characterised in that: it uses following steps
It carries out:
A. after milling train parking, cooling water of working roll is not closed, and continues to keep operating pressure sustained firing；
B. the time of cooling water of working roll sustained firing are as follows:
Roll surface is not present the working roll of dense oxidation film, time >=2 minute of cooling water of working roll sustained firing；
For roll surface, there are the working roll of dense oxidation film, time >=10 minute of cooling water of working roll sustained firing；
C. close cooling water of working roll, extraction working roll simultaneously dries, observe work roll surface due to cooling water oxidation
The rufous of generation aoxidizes rusty scale, and the impact trace of cooling water of working roll is distinguished according to the distribution situation that rufous aoxidizes rusty scale,
The working condition of cooling water of working roll is judged according to impact trace.
2. the online test method of hot-strip working roll cooling work state according to claim 1, it is characterised in that:
When cooling water of working roll strike trace shows following state, illustrates that cooling water of working roll mouth is normal, keep existing working roll
Cooling water nozzle state: (1) hitting trace marshalling, and deflection angle is normal；(2) trace is complete；(3) trace does not have wide, mistake
It is long.
3. the online test method of hot-strip working roll cooling work state according to claim 1, it is characterised in that:
When cooling water of working roll is compared with when cooling water of working roll mouth state is normal, and strike trace broadens or is elongated, illustrate working roll
Cooling water nozzle abrasion, replaces the water nozzle of abrasion immediately.
4. the online test method of hot-strip working roll cooling work state according to claim 1, it is characterised in that:
When cooling water of working roll strike trace is imperfect, illustrates that water nozzle blocks, clear up the foreign matter in water nozzle immediately, cannot such as clear up
When, water nozzle is replaced immediately.
5. the online test method of hot-strip working roll cooling work state according to claim 1, it is characterised in that:
When cooling water of working roll strike trace it is misaligned, individual trace deflection angles compared with when cooling water of working roll mouth state is normal
Degree becomes larger or individual trace deflection angles become smaller, and illustrates that cooling water of working roll mouth setting angle just, is not shown according to strike trace
Angle deviating situation accordingly adjust the deflection angle of water nozzle.
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| CN201710427871.5A CN107175261B (en) | 2017-06-08 | 2017-06-08 | A kind of online test method of hot-strip working roll cooling work state |
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| CN201710427871.5A CN107175261B (en) | 2017-06-08 | 2017-06-08 | A kind of online test method of hot-strip working roll cooling work state |
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| CN107175261A CN107175261A (en) | 2017-09-19 |
| CN107175261B true CN107175261B (en) | 2019-01-22 |
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| CN114453438A (en) * | 2022-01-06 | 2022-05-10 | 首钢京唐钢铁联合有限责任公司 | Method for evaluating cooling effect of roller cooling water |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4017293C1 (en) * | 1990-05-30 | 1991-08-29 | Hoesch Stahl Ag, 4600 Dortmund, De | High pressure fluid cleaning method - involves using equation with deviation detected to selectively halt operation |
| CN1509879A (en) * | 2002-12-25 | 2004-07-07 | 精工爱普生株式会社 | Nozzle block tester, liquid drop ejector, electro-optic device and manufacturing method thereof |
| CN2649209Y (en) * | 2003-10-08 | 2004-10-20 | 浙江大学 | Hot-rolling water descaling failure detecting device |
| CN101125483A (en) * | 2006-08-14 | 2008-02-20 | 三星电子株式会社 | Array type inkjet printer and method for determining condition of nozzles thereof |
| CN101221095A (en) * | 2008-01-23 | 2008-07-16 | 广州珠江钢铁有限责任公司 | On-line detecting device and method for scale removing nozzle in roller mill descaling system |
| CN101648220A (en) * | 2008-08-15 | 2010-02-17 | 宝山钢铁股份有限公司 | Method for online detection of roll cooling |
| CN102172642A (en) * | 2010-12-30 | 2011-09-07 | 一重集团大连设计研究院有限公司 | Spray nozzle fault detection method for finely cooling device of cold rolling mill |
-
2017
- 2017-06-08 CN CN201710427871.5A patent/CN107175261B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4017293C1 (en) * | 1990-05-30 | 1991-08-29 | Hoesch Stahl Ag, 4600 Dortmund, De | High pressure fluid cleaning method - involves using equation with deviation detected to selectively halt operation |
| CN1509879A (en) * | 2002-12-25 | 2004-07-07 | 精工爱普生株式会社 | Nozzle block tester, liquid drop ejector, electro-optic device and manufacturing method thereof |
| CN2649209Y (en) * | 2003-10-08 | 2004-10-20 | 浙江大学 | Hot-rolling water descaling failure detecting device |
| CN101125483A (en) * | 2006-08-14 | 2008-02-20 | 三星电子株式会社 | Array type inkjet printer and method for determining condition of nozzles thereof |
| CN101221095A (en) * | 2008-01-23 | 2008-07-16 | 广州珠江钢铁有限责任公司 | On-line detecting device and method for scale removing nozzle in roller mill descaling system |
| CN101648220A (en) * | 2008-08-15 | 2010-02-17 | 宝山钢铁股份有限公司 | Method for online detection of roll cooling |
| CN102172642A (en) * | 2010-12-30 | 2011-09-07 | 一重集团大连设计研究院有限公司 | Spray nozzle fault detection method for finely cooling device of cold rolling mill |
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| CN107175261A (en) | 2017-09-19 |
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