CN114210740A - Automatic control method for cooling water of hot continuous rolling strip steel rolling line - Google Patents
Automatic control method for cooling water of hot continuous rolling strip steel rolling line Download PDFInfo
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- CN114210740A CN114210740A CN202111478130.2A CN202111478130A CN114210740A CN 114210740 A CN114210740 A CN 114210740A CN 202111478130 A CN202111478130 A CN 202111478130A CN 114210740 A CN114210740 A CN 114210740A
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- cooling water
- steel
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- water
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- 239000000498 cooling water Substances 0.000 title claims abstract description 118
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 114
- 239000010959 steel Substances 0.000 title claims abstract description 114
- 238000005096 rolling process Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000010935 stainless steel Substances 0.000 claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 26
- 238000013145 classification model Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 230000009471 action Effects 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 11
- 238000007664 blowing Methods 0.000 claims description 9
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000010965 430 stainless steel Substances 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000002352 surface water Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- 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
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
Abstract
A cooling water automatic control method for a hot continuous rolling strip steel rolling line belongs to the technical field of hot continuous rolling strip steel rolling lines, solves the technical problem of accurate opening and closing of the cooling water of the hot continuous rolling strip steel rolling line, and comprises the following steps: s1, establishing a cooling water opening and closing model at each stage of the hot continuous rolling strip steel rolling line; s2, establishing a cooling water control classification model according to the steel grade, and determining the opening and closing time of the cooling water in each stage in the step S1; and S3, tracking position control. According to the invention, control functions are developed according to steel specification, material tracking and the like, when the cooling water is turned off during the production time of the stainless steel, and when the stainless steel passes through the equipment, the cooling water is turned on, so that the cooling water is turned off during the production process of the stainless steel, and the equipment is fully cooled during the interval time of producing the stainless steel, thereby ensuring the normal operation of the equipment.
Description
Technical Field
The invention belongs to the technical field of hot continuous rolling strip steel rolling lines, and particularly relates to an automatic control method for cooling water of a hot continuous rolling strip steel rolling line.
Background
In the production process of stainless steel, cooling water of equipment such as a roller way, a hot coil box, a flying shear, laminar cooling and the like is required to be shut down. However, the stainless steel is continuously produced, and equipment cooling water is shut down for a long time, so that the equipment is damaged, and the equipment is stopped due to failure; when stainless steel is rolled, the cooling water of equipment such as a roller way, a hot coil box, a flying shear, laminar cooling and the like cannot be accurately controlled to be opened or closed, and the quality of the surface, the performance and the like of the stainless steel is seriously influenced.
Disclosure of Invention
The invention provides an automatic control method for cooling water of a hot continuous rolling strip steel rolling line, aiming at overcoming the defects in the prior art and solving the technical problem of accurate opening and closing of the cooling water of the hot continuous rolling strip steel rolling line.
The invention is realized by the following technical scheme.
A method for automatically controlling cooling water of a hot continuous rolling strip steel rolling line comprises the following steps:
s1, establishing a cooling water opening and closing model at each stage of the hot continuous rolling strip steel rolling line;
s2, establishing a cooling water control classification model according to the steel grade, and determining the opening and closing time of the cooling water in each stage in the step S1;
s3, taking the rolling line position of each cooling water nozzle as an action point, taking four lengths of the action point, namely the length of the strip steel, the residual length of the strip steel, the length of the lower strip steel and the residual length of the lower strip steel according to the condition that whether the steel strip passes through the action point, and switching off the cooling water when the cooling water is switched on in the front 1.5m of the action point, namely the length of the lower strip steel is not less than-1.5 m according to the process requirement; when the residual length of the steel block =0.5m, the cooling water is boiled, and the opening and closing of the cooling water are accurately controlled.
Further, in the step S1, the cooling water opening/closing model is:
cooling water of a front roller way of the roughing mill: is normally opened;
cooling water by using a vertical rod: passing steel gate in odd pass;
dust removal water at the outlet of the roughing mill: normally open and even injection;
e, roller bed cooling water: the cooling area of the roller neck of the roller way is less than or equal to 100 mm;
adding cooling water outside the roller way at the side: closing when passing steel, and opening when not passing steel;
cooling water for the cutting edge of the flying shear: cutting head and then closing, cutting tail and then opening;
blowing water at the front side of the finish rolling descaling box: closing;
cooling water for a pinch roll in front of a finish rolling descaling box: closing when passing steel;
cooling water for a pinch roll behind a finish rolling descaling box: closing when passing steel;
filling water into the finish rolling descaling collecting pipe: closing when passing steel;
cooling water for loop strip: closing when passing steel;
back flushing water between the racks: closing when passing steel, and opening when not passing steel;
cooling water for a frame piece of the finishing mill: closing;
anti-stripping water and roll gap cooling water of the finishing mill: closing;
cooling water of the inner-cooling loop roller: the external cold water is closed when steel passes;
finish rolling and water cutting: the lower surface turning water does not contact the strip steel, the upper surface water collection width does not exceed 100mm, and no columnar cooling water leaks to the edge of the strip steel on two sides of the inlet of the frame;
f6 side-blown water at the outlet of the curling roller: is normally opened;
side blowing water for a curling roller: synchronizing with laminar cooling;
and (3) blowing water to the front upper surface and the front lower surface of the pinch roll: when steel is passed, the steel plate is opened, and when no steel is available, the steel plate is closed, and the whole plate surface needs to be cut by water;
curling side guide cooling water: is normally opened;
cooling water for pinch rolls: is normally opened;
cooling water of the wrapper roller: closing when passing steel, and opening when not passing steel;
cooling water for a winding drum: and closing the valve when steel passes through the valve and opening the valve when no steel exists.
Further, in the step S2, a cooling water control classification model is established based on Ni stainless steel, Cr stainless steel, 430 stainless steel, silicon steel, oriented silicon steel, and carbon steel.
Compared with the prior art, the invention has the beneficial effects that:
1) setting up an intelligent control scheme of cooling water of the stainless steel rolling line, and respectively and intelligently controlling the cooling water of the strip steel at different positions of the rolling line;
2) the single thermal detection control refrigeration cooling water is opened and closed in the past, and a double closed-loop control concept of tracking position control is added;
3) the opening and closing time of cooling water is controlled according to the steel grades when different steel grades are produced;
4) the process requirement of stainless steel rolling cooling water is met, the damage to on-site equipment is avoided, and the cooling water gap control is increased.
In a word, the invention develops control functions according to steel specification, material tracking and the like, when the cooling water is closed during the production time of the stainless steel, and after the stainless steel passes through the equipment, the cooling water is opened, so that the cooling water is closed during the production process of the stainless steel, and the equipment can be fully cooled during the interval time of producing the stainless steel, thereby ensuring the normal operation of the equipment.
Drawings
Fig. 1 is a schematic diagram of tracking position control.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. Unless otherwise specified, the examples follow conventional experimental conditions. In addition, it will be apparent to those skilled in the art that various modifications or improvements can be made to the material components and amounts in these embodiments without departing from the spirit and scope of the invention as defined in the appended claims.
A method for automatically controlling cooling water of a hot continuous rolling strip steel rolling line specifically comprises the following steps:
s1, establishing a cooling water opening and closing model (hereinafter referred to as L1) at each stage of the hot continuous rolling strip steel rolling line:
cooling water of a front roller way of the roughing mill: is normally opened;
cooling water by using a vertical rod: passing steel gate in odd pass;
dust removal water at the outlet of the roughing mill: normally open and even injection;
e, roller bed cooling water: the cooling area of the roller neck of the roller way is less than or equal to 100 mm;
adding cooling water outside the roller way at the side: closing when passing steel, and opening when not passing steel;
cooling water for the cutting edge of the flying shear: cutting head and then closing, cutting tail and then opening;
blowing water at the front side of the finish rolling descaling box: closing;
cooling water for a pinch roll in front of a finish rolling descaling box: closing when passing steel;
cooling water for a pinch roll behind a finish rolling descaling box: closing when passing steel;
filling water into the finish rolling descaling collecting pipe: closing when passing steel;
cooling water for loop strip: closing when passing steel;
back flushing water between the racks: closing when passing steel, and opening when not passing steel;
cooling water for a frame piece of the finishing mill: closing;
anti-stripping water and roll gap cooling water of the finishing mill: closing;
cooling water of the inner-cooling loop roller: the external cold water is closed when steel passes;
finish rolling and water cutting: the lower surface turning water does not contact the strip steel, the upper surface water collection width does not exceed 100mm, and no columnar cooling water leaks to the edge of the strip steel on two sides of the inlet of the frame;
f6 side-blown water at the outlet of the curling roller: is normally opened;
side blowing water for a curling roller: synchronizing with laminar cooling;
and (3) blowing water to the front upper surface and the front lower surface of the pinch roll: when steel is passed, the steel plate is opened, and when no steel is available, the steel plate is closed, and the whole plate surface needs to be cut by water;
curling side guide cooling water: is normally opened;
cooling water for pinch rolls: is normally opened;
cooling water of the wrapper roller: closing when passing steel, and opening when not passing steel;
cooling water for a winding drum: and closing the valve when steel passes through the valve and opening the valve when no steel exists.
S2, establishing a cooling water control classification model according to steel types (Ni stainless steel, Cr stainless steel, 430 stainless steel, silicon steel, oriented silicon steel and carbon steel), and determining the opening and closing time (hereinafter referred to as L2) of the cooling water in each stage in the step S1;
s3, taking the rolling line position of each cooling water nozzle as an action point, taking four lengths of the action point, namely the length of the strip steel, the residual length of the strip steel, the length of the lower strip steel and the residual length of the lower strip steel according to the condition that whether the steel strip passes through the action point, and switching off the cooling water when the cooling water is switched on in the front 1.5m of the action point, namely the length of the lower strip steel is not less than-1.5 m according to the process requirement; when the residual length of the steel block =0.5m, the cooling water is boiled, and the opening and closing of the cooling water are accurately controlled. Because the working environment is severe, the thermal detection has instability such as false detection, and the bidirectional control technology of intelligent tracking position control is added, and the stainless steel position tracking is more accurately carried out.
Taking rough rolling E0 cooling water control of Ni stainless steel as an example, a cooling water model of the Ni stainless steel is called according to rolling details, basic automation L1 selects a control logic of the Ni stainless steel according to L2 to control cooling water of equipment, and E0 cooling water is controlled by ON/OFF of HMD 45. As shown in fig. 1, the rolling line position of the E0 cooling water nozzle is taken as an action point, then according to the 'occupation' condition of the action point, four lengths of the action point are taken, namely the length of the strip steel, the residual length of the strip steel, the length of the lower strip steel and the residual length of the lower strip steel, and then according to the process requirement, when the cooling water is opened in the front 1.5m of the action point, namely the length of the lower strip steel = -1.5m, the cooling water is closed; when the remaining length of the steel block =0.5m, the cooling water is boiled. Accurately control the opening and closing of cooling water, realized in the stainless steel production process, the automatic tracking control of equipment cooling water opening and closing, promptly: the cooling water of the equipment is turned off during the production of the stainless steel, and the cooling water is automatically turned on after the strip steel passes through the equipment, so that the equipment is ensured to be sufficiently cooled in time, and the failure rate of the equipment is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (3)
1. A method for automatically controlling cooling water of a hot continuous rolling strip steel rolling line is characterized by comprising the following steps:
s1, establishing a cooling water opening and closing model at each stage of the hot continuous rolling strip steel rolling line;
s2, establishing a cooling water control classification model according to the steel grade, and determining the opening and closing time of the cooling water in each stage in the step S1;
s3, taking the rolling line position of each cooling water nozzle as an action point, taking four lengths of the action point, namely the length of the strip steel, the residual length of the strip steel, the length of the lower strip steel and the residual length of the lower strip steel according to the condition that whether the steel strip passes through the action point, and switching off the cooling water when the cooling water is switched on in the front 1.5m of the action point, namely the length of the lower strip steel is not less than-1.5 m according to the process requirement; when the residual length of the steel block =0.5m, the cooling water is boiled, and the opening and closing of the cooling water are accurately controlled.
2. The automatic control method of the cooling water of the hot continuous rolling strip steel rolling line according to claim 1, characterized in that: in step S1, the cooling water opening/closing model is:
cooling water of a front roller way of the roughing mill: is normally opened;
cooling water by using a vertical rod: passing steel gate in odd pass;
dust removal water at the outlet of the roughing mill: normally open and even injection;
e, roller bed cooling water: the cooling area of the roller neck of the roller way is less than or equal to 100 mm;
adding cooling water outside the roller way at the side: closing when passing steel, and opening when not passing steel;
cooling water for the cutting edge of the flying shear: cutting head and then closing, cutting tail and then opening;
blowing water at the front side of the finish rolling descaling box: closing;
cooling water for a pinch roll in front of a finish rolling descaling box: closing when passing steel;
cooling water for a pinch roll behind a finish rolling descaling box: closing when passing steel;
filling water into the finish rolling descaling collecting pipe: closing when passing steel;
cooling water for loop strip: closing when passing steel;
back flushing water between the racks: closing when passing steel, and opening when not passing steel;
cooling water for a frame piece of the finishing mill: closing;
anti-stripping water and roll gap cooling water of the finishing mill: closing;
cooling water of the inner-cooling loop roller: the external cold water is closed when steel passes;
finish rolling and water cutting: the lower surface turning water does not contact the strip steel, the upper surface water collection width does not exceed 100mm, and no columnar cooling water leaks to the edge of the strip steel on two sides of the inlet of the frame;
f6 side-blown water at the outlet of the curling roller: is normally opened;
side blowing water for a curling roller: synchronizing with laminar cooling;
and (3) blowing water to the front upper surface and the front lower surface of the pinch roll: when steel is passed, the steel plate is opened, and when no steel is available, the steel plate is closed, and the whole plate surface needs to be cut by water;
curling side guide cooling water: is normally opened;
cooling water for pinch rolls: is normally opened;
cooling water of the wrapper roller: closing when passing steel, and opening when not passing steel;
cooling water for a winding drum: and closing the valve when steel passes through the valve and opening the valve when no steel exists.
3. The automatic control method of the cooling water of the hot continuous rolling strip steel rolling line according to claim 1, characterized in that: in the step S2, a cooling water control classification model is established based on Ni stainless steel, Cr stainless steel, 430 stainless steel, silicon steel, oriented silicon steel, and carbon steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111478130.2A CN114210740A (en) | 2021-12-06 | 2021-12-06 | Automatic control method for cooling water of hot continuous rolling strip steel rolling line |
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| CN202111478130.2A CN114210740A (en) | 2021-12-06 | 2021-12-06 | Automatic control method for cooling water of hot continuous rolling strip steel rolling line |
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| CN114210740A true CN114210740A (en) | 2022-03-22 |
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