CN110947781B - Method for preventing strip breakage of cold-rolled strip steel cleaning section - Google Patents
Method for preventing strip breakage of cold-rolled strip steel cleaning section Download PDFInfo
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- CN110947781B CN110947781B CN201911333566.5A CN201911333566A CN110947781B CN 110947781 B CN110947781 B CN 110947781B CN 201911333566 A CN201911333566 A CN 201911333566A CN 110947781 B CN110947781 B CN 110947781B
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- strip
- strip steel
- position detector
- steel
- cleaning section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
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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
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
Abstract
The invention provides a method for preventing strip breakage of a cold-rolled strip steel cleaning section, wherein a position detector is arranged in each washing tank of the cleaning section, strip steel position information of a corresponding position is detected through the position detector, strip steel deviation amount and deviation time of the corresponding position are calculated when the position detector detects that the strip steel deviates, the line pressure of a drying roll close to the position detector to the strip steel is adjusted to be the minimum value, and the line pressure of the corresponding drying roll to the strip steel is recovered when the strip steel deviation amount detected by the position detector is smaller than a set value. In the method, the position detector is matched with the wringing roller, whether the corresponding position of the strip steel deviates or not is judged through the position detector, and further the line pressure of the nearby wringing roller to the strip steel is adjusted to the minimum value, so that the deviation phenomenon of the strip steel in a cleaning section can be effectively controlled, the strip steel is prevented from being broken, and the integral control is simple and easy to realize.
Description
Technical Field
The invention relates to cold-rolled strip steel, in particular to a method for preventing strip breakage of a cleaning section of the cold-rolled strip steel.
Background
The surface of the cold-rolled strip steel has a large amount of dirt, and the total amount of one surface of the cold-rolled strip steel is generally as high as 300-2. The dirt is mainly composed of three parts, and one layer clinging to the matrix is an iron oxide film; iron powder and other loose impurities are on the surface of the iron powder; the outermost layer is an oil film layer mainly containing rolling oil. If the dirt is not cleaned, the quality of the subsequent coating is affected, for example, defects such as uneven coating or poor adhesion can be generated, and accretions can be formed on the surface of the furnace roller, so that the surface of the strip steel is stamped or scratched. Therefore, the cold rolling coating unit is provided with a strip steel cleaning section to remove the dirt on the surface of the strip steel.
When the strip steel runs in the cleaning section, the deviation of the strip steel is often caused due to the installation accuracy of the drying rollers, so that the strip steel is broken, the unit stops, and the loss is huge.
Usually, a strip steel deviation rectifying device is respectively arranged at an inlet and an outlet of the cleaning section, so that strip steel enters the cleaning section in a centering manner, and the strip steel returns to a central line after the deviation is caused in the cleaning section. The setting method can not solve the problems of band steel deviation and band breakage caused by insufficient manufacturing and mounting precision of the cleaning section drying roll.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a method for preventing the strip breakage of a cleaning section of cold-rolled strip steel, and aims to solve the problem that the strip steel is easy to deviate and break in the conventional cleaning section.
The invention is realized by the following steps:
the embodiment of the invention provides a method for preventing strip breakage of a cold-rolled strip steel cleaning section, wherein a position detector is arranged in each washing tank of the cleaning section, strip steel position information of a corresponding position is detected through the position detector, strip steel deviation amount and deviation time of the corresponding position are calculated when the position detector detects that the strip steel deviates, the linear pressure of a wringing roller close to the position detector on the strip steel is adjusted to be the minimum value, and the linear pressure of the corresponding wringing roller on the strip steel is recovered when the strip steel deviation amount detected by the position detector is smaller than a set value.
Furthermore, the washing tank comprises an alkali liquor spraying tank, an alkali liquor brushing tank, a water brushing tank and a hot water spraying tank, and the alkali liquor spraying tank, the alkali liquor brushing tank, the water brushing tank and the hot water spraying tank are sequentially arranged along the moving direction of the strip steel.
Furthermore, a dryer is arranged on the discharge side of the hot water spray tank, a position detector is arranged between the hot water spray tank and the dryer, the position detector is close to the discharge side of the hot water spray tank, and at least one group of squeezing rollers close to the discharge side is arranged in the hot water spray tank.
Furthermore, a position detector is arranged in the alkali liquor scrubbing tank, the position detector is close to the discharge side of the alkali liquor scrubbing tank, and a squeezing roller is arranged on the discharge side of the position detector.
Further, when the deviation of the strip steel is 10-30 mm, adjusting the linear pressure of a group of drying rollers closest to the position detector to the strip steel to the minimum value; when the deviation amount of the strip steel is 30-150 mm, the linear pressure of at least two groups of wringing rollers closest to the position detector on the strip steel is adjusted to the minimum value.
Further, when the deviation amount of the strip steel is more than 20mm, the line pressure of one group of wringing rollers closest to the corresponding position detector to the strip steel is adjusted to the minimum value, and when the adjusting time is 2-30s, the line pressure of one group or multiple groups of wringing rollers closest to the corresponding position detector to the strip steel is adjusted to the minimum value.
Further, the line pressure of the drying roll to the strip steel is minimized by opening the drying roll.
Further, according to the roughness of the surface of the strip steel, the minimum value of the linear pressure value of the squeeze roll to the strip steel is determined, and the range of the minimum value of the linear pressure value is 0.02Kg/cm-2.0 Kg/cm.
Further, when the deviation of the strip steel is less than 10mm, the line pressure of the corresponding drying roller to the strip steel is recovered.
Further, the linear pressure of the drying roll to the strip steel is controlled by a cylinder, a hydraulic cylinder or a motor.
The invention has the following beneficial effects:
in the method, the position detectors are arranged in the washing tanks of the washing section and are matched with the wringing rollers, the position information of the strip steel at the corresponding position is detected by the position detectors, whether the strip steel deviates or not and the deviation time are judged according to the position information, and further the linear pressure of the wringing rollers corresponding to the position detectors on the strip steel can be adjusted to the minimum value, so that the deviation amount of the strip steel at the corresponding position can be effectively controlled, and the linear pressure of the wringing rollers on the strip steel can be recovered when the deviation amount is smaller than a set value. In the method, the position detector is matched with the wringing roller, so that the deviation of the strip steel in the cleaning section can be effectively controlled, the strip steel can be effectively prevented from being broken in the cleaning section, and the integral control is convenient and easy to realize.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a strip steel cleaning section according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides a method for preventing a strip breakage in a cleaning section of a cold-rolled strip steel, and specifically, a method for controlling a continuous deviation of a strip steel 2 in the cleaning section is provided, wherein a position detector 1 is mainly disposed in each washing tank of the cleaning section, the position detector 1 can detect position information of the strip steel 2 at a corresponding position, the position information of the position of the strip steel 2 is compared with preset position information, and then whether the strip steel 2 deviates at the position can be determined, and when the deviation occurs, a deviation time is recorded, then a line pressure of a wiping roller 3 close to the position detector 1 to the strip steel 2 is adjusted to a minimum value, of course, the wiping roller 3 closest to the position detector 1 is preferred, and when a deviation amount of the strip steel 2 detected by the position detector 1 is smaller than a set value, the line pressure of the corresponding wiping roller 3 to the strip steel 2 can be recovered, when adjusting the squeeze roller 3 by the position detector 1, the squeeze roller 3 on the feed side of the position detector 1, the squeeze roller 3 on the discharge side of the position detector 1, or both the squeeze rollers 3 on the feed side and the discharge side of the position detector 1 can be adjusted. In the invention, the position detectors 1 are matched with the wringing rollers 3, namely the wringing rollers 3 are arranged near each position detector 1, the number of the position detectors 1 is determined according to the plate shape condition of the strip steel 2 and the number of the wringing rollers 3 in each washing tank, and when the washing tank is also provided with the supporting rollers or the brush rollers 9, the number of the position detectors 1 is determined according to the number of the supporting rollers or the brush rollers 9 and the installation precision, whether the linear pressure of the wringing rollers 3 on the strip steel 2 is the minimum value is controlled through the position detectors 1, and then the deviation behavior of the strip steel 2 in a cleaning section can be effectively controlled, so that the problem that the strip steel 2 is broken in the cleaning section can be effectively avoided, and the whole method is easy to realize and convenient to control.
The embodiment of the invention also provides a cold-rolled steel strip 2 cleaning section which comprises washing tanks, wherein the washing tanks comprise at least one of an alkali liquor spray washing tank 4, an alkali liquor scrubbing tank 5, a water scrubbing tank 6 and a hot water spray washing tank 7, the washing tanks can be mutually combined, when the washing tanks are four types, the washing tanks are sequentially arranged at intervals along the moving direction of the steel strip 2, a position detector 1 is arranged in each washing tank, a wringing roller 3 is also arranged in each washing tank, and the wringing rollers 3 are controlled according to the detection result of the position detector 1. Generally, the wringing roller 3 comprises two opposite roller shafts, and the two roller shafts are controlled to move by a driving part, wherein the driving part can be an air cylinder, a hydraulic cylinder or a motor, and drives the two roller shafts to linearly move in the vertical direction, so that the linear pressure of the wringing roller 3 on the strip steel 2 can be controlled to be the minimum value.
The refining alkali spray washing tank is internally provided with a wringing roller 3, alkali liquor injection pipes 8 and a position detector 1, wherein the wringing roller 3 is arranged on the feeding side of the alkali spray washing tank, the position detector 1 is positioned on the discharging side, a plurality of groups of alkali liquor injection pipes 8 are arranged between the wringing roller 3 and the position detector 1, and the alkali liquor injection pipes 8 are sequentially arranged at intervals along the moving direction of the strip steel 2. Generally, an alkali spray washing tank is arranged, and then an alkali washing tank 5 is arranged, a wringing roller 3, a position detector 1 and a brush roller 9 are arranged in the alkali washing tank 5, wherein the feed side and the discharge side of the alkali liquor scrubbing tank 5 are both provided with a wringing roller 3, the position detector 1 is also arranged at the discharge side and is positioned at the feed side corresponding to the wringing roller 3, the brush rolls 9 are positioned between the position detector 1 and the feeding side wringing rolls 3, the brush rolls 9 are in a plurality of groups and are sequentially arranged at intervals along the moving direction of the strip steel 2, therefore, when the position detector 1 of the alkali spray washing tank detects that the strip steel 2 at the corresponding position deviates, the line pressure of the wringing rollers 3 in the alkali spray washing tank or the wringing rollers 3 at the feed side of the alkali liquor washing tank 5 to the strip steel 2 can be controlled to be the minimum value through the driving piece, and the line pressure of the two groups of wringing rollers 3 to the strip steel 2 can be adjusted to be the minimum value at the same time.
For the water scrubbing tank 6, the squeezing rollers 3, the brush rollers 9 and the position detector 1 are arranged in the water scrubbing tank 6, the squeezing rollers 3 are arranged on the feeding side and the discharging side of the water scrubbing tank 6, the brush rollers 9 are multiple groups and are sequentially arranged between the two groups of squeezing rollers 3, and the position detector 1 is located on the feeding side of the squeezing rollers 3 on the discharging side. The hot water spray washing tank 7 is internally provided with a plurality of groups of wringing rollers 3, at least one group of hot water spray pipes 10 is arranged between two adjacent groups of wringing rollers 3, and the position detector 1 is arranged in the middle of the hot water spray washing tank 7, particularly on the feeding side of one wringing roller 3.
In a preferred embodiment, a dryer 11 is further provided at the discharge side of the hot water spray tank 7, a position detector 1 is provided between the hot water spray tank 7 and the dryer 11, and the position detector 1 is close to the discharge side of the hot water spray tank 7, and at least one set of wringing rollers 3 close to the discharge side is provided in the hot water spray tank 7. In the embodiment, the dryer 11 is additionally arranged and used for drying the strip steel 2 cleaned by the hot water spray washing tank 7, the position detector 1 is used for detecting whether the strip steel 2 entering the dryer 11 deviates, and when the deviation occurs, the driving piece controls the line pressure of at least one group of wringing rollers 3 close to the discharge side of the hot water spray washing tank 7 to the strip steel 2 to be the minimum value.
When the position detector 1 controls the line pressure of the corresponding drying roller 3 to the strip steel 2 to be the minimum value, two adjusting modes are provided, wherein one mode is that a driving part is adopted to directly control the opening of two roller shafts of the drying roller 3, and the other mode is that the driving part can not control the two roller shafts of the drying roller 3 to be completely separated from the strip steel 2, the drying roller 3 has a certain line pressure to the strip steel 2, specifically, the minimum value of the line pressure of the drying roller 3 to the strip steel 2 can be determined according to the roughness of the surface of the strip steel 2, and the range of the minimum value is 0.02Kg/cm-2.0Kg/cm, namely when the line pressure of the drying roller 3 to the strip steel 2 is in the range, the line pressure of the drying roller 3 to the strip steel 2 is defaulted to be the minimum.
Specifically, when the strip steel 2 deviates, the linear pressure of the corresponding drying roll 3 on the strip steel 2 can be adjusted to the minimum value in two ways. For example, when the deviation amount of the strip steel 2 is 10 mm-30 mm, the line pressure of one group of drying rollers 3 closest to the position detector 1 to the strip steel 2 is adjusted to the minimum value, and when the deviation amount is 30 mm-150 mm, the line pressure of at least two groups of drying rollers 3 closest to the position detector 1 to the strip steel 2 is adjusted to the minimum value, namely, the number of the drying rollers 3 is adjusted according to the deviation amount of the strip steel 2 in the mode, when the deviation amount is relatively small, only the line pressure of one group of drying rollers 3 closest to the position detector 1 needs to be adjusted, and when the deviation amount is relatively large, the line pressure of a plurality of groups of drying rollers 3 close to the position detector 1 needs to be adjusted. In another adjustment mode, when the deviation amount of the strip steel 2 is more than 20mm, the line pressure of one group of drying rollers 3 closest to the corresponding position detector 1 to the strip steel 2 is adjusted to the minimum value, when the adjustment time is 2-30s or more than 30s, the line pressure of one or more groups of drying rollers 3 closest to the corresponding position detector 1 to the strip steel 2 is adjusted to the minimum value, the adjustment number of the drying rollers 3 is related to the adjustment time, and when the adjustment time is longer, the line pressure of the plurality of groups of drying rollers 3 to the strip steel 2 is adjusted to the minimum value. Generally speaking, when the deviation of the strip steel 2 is less than 10mm, the line pressure of the corresponding drying roll 3 to the strip steel 2 can be recovered, namely the deviation range is a reasonable range.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for preventing the strip breakage of a cleaning section of cold-rolled strip steel is characterized by comprising the following steps: and the position detectors are arranged in all the washing tanks of the cleaning section, the position detectors are used for detecting the strip steel position information of the corresponding position, when the position detectors detect the strip steel deviation, the strip steel deviation amount and the deviation time of the corresponding position are calculated, the line pressure of the squeezing rollers close to the position detectors to the strip steel is adjusted to the minimum value, and when the strip steel deviation amount detected by the position detectors is smaller than a set value, the line pressure of the corresponding squeezing rollers to the strip steel is recovered.
2. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: the washing tank comprises an alkali liquor spraying tank, an alkali liquor washing tank, a water washing tank and a hot water spraying tank, and the alkali liquor spraying tank, the alkali liquor washing tank, the water washing tank and the hot water spraying tank are sequentially arranged along the moving direction of the strip steel.
3. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 2, wherein: the discharge side of the hot water spray washing groove is also provided with a dryer, a position detector is arranged between the hot water spray washing groove and the dryer, the position detector is close to the discharge side of the hot water spray washing groove, and at least one group of squeezing rollers close to the discharge side is arranged in the hot water spray washing groove.
4. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 2, wherein: a position detector is arranged in the alkali liquor scrubbing tank, the position detector is close to the discharge side of the alkali liquor scrubbing tank, and a squeezing roller is arranged on the discharge side of the position detector.
5. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: when the deviation amount of the strip steel is more than or equal to 10mm and less than 30mm, adjusting the linear pressure of a group of wringing rollers closest to the position detector to the strip steel to the minimum value; and when the deviation amount of the strip steel is more than or equal to 30mm and less than or equal to 150mm, adjusting the linear pressure of at least two groups of wringing rollers closest to the position detector to the strip steel to the minimum value.
6. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: when the deviation amount of the strip steel is more than 20mm, adjusting the line pressure of one group of wringing rollers closest to the corresponding position detector to the strip steel to the minimum value, and when the adjusting time is 2-30s, adjusting the line pressure of one or more groups of wringing rollers closest to the corresponding position detector to the strip steel to the minimum value.
7. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: the line pressure of the wringing roller to the strip steel is minimized by opening the wringing roller.
8. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: and determining the minimum value of the linear pressure value of the squeeze roll to the strip steel according to the roughness of the surface of the strip steel, wherein the minimum value range of the linear pressure value is 0.02Kg/cm-2.0 Kg/cm.
9. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: and when the deviation amount of the strip steel is less than 10mm, restoring the linear pressure of the corresponding drying roller on the strip steel.
10. The method for preventing the strip breakage of the cleaning section of the cold rolled steel strip as set forth in claim 1, wherein: the linear pressure of the drying roller to the strip steel is controlled by a cylinder, a hydraulic cylinder or a motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911333566.5A CN110947781B (en) | 2019-12-23 | 2019-12-23 | Method for preventing strip breakage of cold-rolled strip steel cleaning section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911333566.5A CN110947781B (en) | 2019-12-23 | 2019-12-23 | Method for preventing strip breakage of cold-rolled strip steel cleaning section |
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| Publication Number | Publication Date |
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| CN110947781A CN110947781A (en) | 2020-04-03 |
| CN110947781B true CN110947781B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911333566.5A Active CN110947781B (en) | 2019-12-23 | 2019-12-23 | Method for preventing strip breakage of cold-rolled strip steel cleaning section |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB230808A (en) * | 1924-03-11 | 1926-04-15 | Elisee Charles Duhamel | Process of and apparatus for washing or otherwise treating wool and other fibrous textile materials |
| CN201702082U (en) * | 2010-06-03 | 2011-01-12 | 江苏立霸实业股份有限公司 | Unpowered corrective device of color-painted wringer roll |
| CN202509138U (en) * | 2012-03-23 | 2012-10-31 | 武汉钢铁(集团)公司 | Alarming device for preventing belt breaking of cleaning section of continuous annealing unit |
| CN102814346B (en) * | 2012-07-17 | 2016-06-01 | 中冶南方工程技术有限公司 | Strip steel deviation method |
| CN204779834U (en) * | 2015-02-26 | 2015-11-18 | 莱芜市泰山冷轧板有限公司 | Pickling steel band surface wringing roller convenient to change and prevent steel band off tracking |
| CN207793644U (en) * | 2017-12-22 | 2018-08-31 | 绍兴蒲华纺织品有限公司 | A kind of napper correcting guiding device |
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