CN115647077A - Cold continuous rolling unit for improving temperature control precision and control method thereof - Google Patents
Cold continuous rolling unit for improving temperature control precision and control method thereof Download PDFInfo
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- CN115647077A CN115647077A CN202211575982.8A CN202211575982A CN115647077A CN 115647077 A CN115647077 A CN 115647077A CN 202211575982 A CN202211575982 A CN 202211575982A CN 115647077 A CN115647077 A CN 115647077A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000000839 emulsion Substances 0.000 claims abstract description 82
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims abstract description 4
- 238000011084 recovery Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 8
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000004886 process control Methods 0.000 abstract description 6
- 238000005097 cold rolling Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 44
- 229910000976 Electrical steel Inorganic materials 0.000 description 11
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000012535 impurity Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
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- 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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Control Of Metal Rolling (AREA)
Abstract
The invention discloses a cold continuous rolling unit for improving temperature control precision and a control method thereof, relating to the technical field of cold rolling, wherein the cold continuous rolling unit comprises: the strip steel is rolled through the frame; an oil tank for containing an emulsion; one end of the valve is communicated with the oil tank through a pipeline, and the other end of the valve sprays emulsion to the rack and the strip steel through the pipeline for cooling; and the controller acquires the real-time temperature of the strip steel and controls the amount of the emulsion output by the valve according to the real-time temperature so as to improve the control precision of the real-time temperature. The method improves the temperature control precision of the strip steel rolled by the continuous rolling unit, and further improves the yield and the process control index of the high value-added products.
Description
Technical Field
The invention relates to the technical field of cold rolling, in particular to a cold continuous rolling unit for improving temperature control precision and a control method thereof.
Background
Because the cold continuous rolling mill group has the characteristics of high yield when the cold continuous rolling mill group is used, high product success rate, high thickness and high plate shape stability and the like, the cold continuous rolling mill group is gradually replacing the operation contents of a single-stand rolling mill in rolling of medium and high-grade non-oriented silicon steel, partially oriented silicon steel and the like, but because the product performance and the rolling process requirements of the part are met, the temperature of strip steel needs to be rapidly increased in the rolling process, particularly in the rolling of the previous passes/stands, and therefore a single-stand equipment configuration is provided with a plate temperature meter, an emulsion flow regulating valve, an emulsion variable frequency speed regulating jet motor and the like. However, the equipment is not provided in the conventional cold continuous rolling unit, and a single-stand two-stage system is provided with a temperature prejudgment model, namely the temperature of the strip steel at the outlet side of a certain rolling mill is calculated through rolling speed, emulsion control flow and the like, but the equipment is not provided in the continuous rolling mill.
How to realize the accurate control of the temperature of the strip steel on the continuous rolling mill and further realize the medium and high grade non-oriented silicon steel and even oriented silicon steel on the continuous rolling mill is always a difficult problem for the technical personnel of the rolling mill to overcome. The differences of the carding single frame and the traditional cold continuous rolling mill equipment and the control process are as follows:
the single-stand reciprocating rolling mill strip steel temperature control process comprises the following steps:
1. an inlet and outlet plate thermometer;
2. an emulsion flow regulating valve and a flowmeter;
3. an emulsion variable-frequency injection motor;
4. and (5) a strip steel temperature prediction model.
The emulsion control process of the conventional cold continuous rolling mill comprises the following steps:
1. the emulsion constant-speed injection motor;
2. main pipeline pressure regulating valve and pressure sensor.
The pressure regulating valve and the sensor of the main pipeline of the continuous rolling mill can only be regulated according to a fixed pressure value, namely, the flow of the outlet of the emulsion injection header pipe is kept unchanged no matter the strip steel is in the low-speed or high-speed rolling process, so that the cooling speed is too high in the low-speed rolling process of the strip steel, the stability of the high-grade and medium-grade rolling process is influenced on the one hand, and the performance stability of the product is also influenced on the other hand.
Disclosure of Invention
The invention aims to provide a cold continuous rolling unit for improving the temperature control precision and a control method thereof, so that the process and equipment conditions for rolling high-grade and partially oriented silicon steel on the cold continuous rolling unit are realized, the temperature control precision of strip steel rolled by the continuous rolling unit is improved, and the yield and the process control index of high value-added products are further improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a first aspect of an embodiment of the present invention provides a cold continuous rolling mill group that improves temperature control accuracy, including: a stand through which strip steel is rolled; an oil tank for containing an emulsion; one end of the valve is communicated with the oil tank through a pipeline, and the other end of the valve sprays emulsion to the rack and the strip steel through the pipeline so as to be used for cooling; and the controller acquires the real-time temperature of the strip steel and controls the amount of the emulsion output by the valve according to the real-time temperature so as to improve the control precision of the real-time temperature.
In some embodiments, the cold continuous rolling mill train further comprises a motor pump disposed between the valve and the oil tank and respectively communicated with the valve and the oil tank through pipes.
In some embodiments, the cold continuous rolling mill train further comprises a pressure gauge connected to the pipe between the motor pump and the valve for detecting a pipe pressure.
In some embodiments, the cold continuous rolling mill train further comprises a flow meter disposed on the pipe at the other end of the valve for detecting a pipe flow.
In some embodiments, the valves comprise a first valve, a second valve and a third valve, the output end of the first valve is connected with a pipeline for spraying emulsion to the strip steel, and the output ends of the second valve and the third valve are connected with a pipeline for spraying emulsion to the upper roller and the lower roller of the stand; the flow meter comprises a first flow meter, a second flow meter and a third flow meter, the first flow meter is arranged on a pipeline at the output end of the first valve, the second flow meter is arranged on a pipeline at the output end of the second valve, and the third flow meter is arranged on a pipeline at the output end of the third valve.
In some embodiments, the cold continuous rolling mill train further comprises a recovery tank disposed at a lower end of the stand for recovering the emulsion sprayed from the other end of the valve.
In some embodiments, the oil tank comprises an oil return tank, the oil return tank being in communication with the recovery tank through a conduit for receiving the emulsion of the recovery tank; the oil-purifying device is characterized by further comprising a clean oil tank and an oil pump, wherein one end of the clean oil tank is communicated with the oil return tank through the oil pump, and the other end of the clean oil tank is communicated with the motor pump so that the oil pump can extract the emulsion of the oil return tank to the clean oil tank.
In some embodiments, the cold continuous rolling mill group further comprises a dam roller arranged at the outlet of the frame and a thermometer for measuring the temperature at the outlet of the dam roller, so that the dam roller blocks the emulsion at the inlet of the dam roller and prevents the emulsion from influencing the temperature measurement.
A second aspect of an embodiment of the present invention provides a control method for a cold continuous rolling mill train, including: acquiring the real-time temperature of the strip steel; obtaining the ideal temperature of the strip steel; comparing the real-time temperature with the ideal temperature, and when the real-time temperature is not in the ideal temperature range, calculating a first difference absolute value of the real-time temperature and the ideal temperature; and calculating the ideal output quantity of the emulsion according to the first absolute difference value so as to output the emulsion according to the ideal output quantity.
In some embodiments, after calculating a desired output amount of emulsion based on the first absolute difference value for outputting emulsion based on the desired output amount, the control method further comprises: acquiring the actual flow of the pipeline and the actual pressure of the pipeline; calculating the actual output quantity of the emulsion according to the actual flow and the actual pressure; comparing the actual output quantity with the ideal output quantity, and when the actual output quantity is not in the ideal output quantity range, calculating a second difference absolute value of the actual output quantity and the ideal output quantity; and adjusting the actual flow of the pipeline and the actual pressure of the pipeline according to the second difference absolute value.
According to the cold continuous rolling unit for improving the temperature control precision and the control method thereof, the invention has the following beneficial effects: the steel-rolling temperature in the silicon steel rolling process is more accurate and stable, and the process control requirement can be met. By the method and the device, more convenient and accurate temperature control can be provided for the rolling mill process, so that the control precision of the temperature of the rolled strip steel of the silicon steel cold continuous rolling unit is higher, and the product performance is more excellent. The process and equipment conditions for rolling the medium-high grade and partially oriented silicon steel on the cold continuous rolling unit are realized, the temperature control precision of the strip steel rolled by the continuous rolling unit is improved, and the yield and the process control index of the high value-added products are further improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a portion of a cold continuous rolling mill train according to an embodiment;
fig. 2 is another schematic structural view of a part of a cold continuous rolling mill train according to the embodiment.
The reference numerals are explained below: 1. a frame; 2. strip steel; 3. a valve; 4. a motor pump; 5. a pressure gauge; 6. a first valve; 7. a second valve; 8. a third valve; 9. a first flow meter; 10. a second flow meter; 11. a third flow meter; 12. a recovery tank; 13. an oil return tank; 14. a clean oil tank; 15. an oil pump; 16. a dam roll; 17. a thermometer.
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.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", "third" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "communicate," "mount," "connect," and "connect" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and a repetitive description thereof will be omitted.
Preferred embodiments of the present disclosure are further described in detail below with reference to fig. 1 to 2 of the present specification.
According to some embodiments, as shown in fig. 1, the present application provides a cold continuous rolling mill train that improves temperature control accuracy, the cold continuous rolling mill train including:
the rolling mill comprises a frame 1, wherein strip steel 2 is rolled through the frame 1;
an oil tank for containing an emulsion;
one end of the valve 3 is communicated with the oil tank through a pipeline, and the other end of the valve 3 sprays emulsion to the rack 1 and the strip steel 2 through pipelines so as to reduce the temperature;
and the controller acquires the real-time temperature of the strip steel 2 and controls the amount of the emulsion output by the valve 3 according to the real-time temperature so as to improve the control precision of the real-time temperature.
Based on the above-described embodiment, in rolling the strip 2, the strip 2 passes through the entrance between the upper and lower rolls of the stand 1, and the upper and lower rolls work to roll the strip 2. The controller detects the real-time temperature of the strip steel 2 when the frame 1 rolls the strip steel 2, and if the controller detects that the real-time temperature exceeds the preset ideal temperature, the controller opens the control valve 3 to output emulsion, and the emulsion is sprayed to the frame 1 and the strip steel 2 so as to reduce the temperature of the strip steel 2.
Wherein, the output quantity of the emulsion is determined according to the absolute value of the difference between the real-time temperature and the ideal temperature.
The temperature of the strip steel 2 in the silicon steel rolling process is more accurate and stable, and the process control requirement can be met. By the method and the device, more convenient and accurate temperature control can be provided for the rolling mill process, so that the temperature control precision of the strip steel 2 rolled by the silicon steel cold continuous rolling unit is higher, and the product performance is more excellent. The process and equipment conditions for rolling the medium-high grade and partially oriented silicon steel on the cold continuous rolling mill set are realized, the temperature control precision of the strip steel 2 rolled by the continuous rolling mill set is improved, and the yield and the process control index of the high value-added products are further improved.
According to some embodiments, as shown in fig. 1, the cold continuous rolling mill train further comprises a motor pump 4, wherein the motor pump 4 is arranged between the valve 3 and the oil tank and is respectively communicated with the valve 3 and the oil tank through pipelines.
Based on above-mentioned embodiment, can more fast effectually take the emulsion in the oil tank out through motor pump 4, can be through the flow of valve 3 control emulsion, through the pipeline pressure of motor pump 4 control emulsion, according to the volume of spraying of flow and pressure control emulsion that can be better to and the spraying speed of better control emulsion, so that valve 3 and motor pump 4's cooperation has more the practicality.
According to some embodiments, as shown in fig. 1, the cold continuous rolling mill train further comprises a pressure gauge 5, the pressure gauge 5 connecting the pipe between the motor pump 4 and the valve 3 for detecting the pipe pressure.
Based on the above embodiment, the pressure gauge 5 is used for detecting the pressure of the pipeline, so that the controller controls the working frequency of the motor in the motor pump 4 according to the pressure of the pipeline, the motor frequency is reduced, the motor speed is reduced, the pumping force of the motor pump 4 is reduced when the motor speed is reduced, and the pipeline pressure can be effectively reduced. On the contrary, increasing the motor frequency increases the motor speed, and increasing the motor speed increases the pumping force of the motor pump 4, which can effectively increase the pipeline pressure.
According to some embodiments, as shown in fig. 1, the cold continuous rolling mill train further comprises a flow meter disposed on the pipe at the other end of the valve 3 for detecting the pipe flow.
Based on the above embodiment, the flow meter is used for detecting the emulsion flow of the pipeline, so that the controller controls the opening degree of the valve 3 according to the emulsion flow, and increasing the opening degree of the valve 3 can increase the emulsion flow. Conversely, decreasing the opening of the valve 3 decreases the emulsion flow.
According to some embodiments, as shown in fig. 1, the valves 3 comprise a first valve 6, a second valve 7 and a third valve 8, the output end of the first valve 6 is connected with a pipeline for spraying emulsion to the strip steel 2, and the output ends of the second valve 7 and the third valve 8 are connected with a pipeline for spraying emulsion to the upper roller and the lower roller of the frame 1;
the flow meter comprises a first flow meter 9, a second flow meter 10 and a third flow meter 11, wherein the first flow meter 9 is arranged on a pipeline at the output end of the first valve 6, the second flow meter 10 is arranged on a pipeline at the output end of the second valve 7, and the third flow meter 11 is arranged on a pipeline at the output end of the third valve 8.
Based on the embodiment, the temperatures of the roller and the strip steel 2 can be mutually transferred in the rolling process, when the strip steel 2 needs to be cooled, emulsion is sprayed to the strip steel 2 and the upper roller and the lower roller of the rack 1, and the cooling speed of the strip steel 2 can be rapidly increased.
According to some embodiments, the cold continuous rolling mill train further comprises a recovery tank 12, wherein the recovery tank 12 is arranged at the lower end of the frame 1 and is used for recovering the emulsion sprayed at the other end of the valve 3.
Based on the above embodiment, the emulsion sprayed to the frame 1 and the strip steel 2 is recovered through the recovery tank 12, and then the emulsion in the recovery tank 12 is output to the frame 1 and the strip steel 2 through the oil tank, the motor pump 4 and the valve 3 again, so that the emulsion can be recycled, the production and use cost can be saved, and the recovery tank has practicability.
According to some embodiments, the oil tank comprises an oil return tank 13, the oil return tank 13 being in communication with the recovery tank 12 through a pipe for receiving the emulsion of the recovery tank 12;
still include net oil tank 14 and oil pump 15, the one end of net oil tank 14 pass through oil pump 15 with oil return tank 13 communicates, the other end of net oil tank 14 with motor pump 4 communicates, so that be used for oil pump 15 will oil return tank 13's emulsion extracts to net oil tank 14.
Based on the above embodiment, the oil purification tank 14 can be used for purifying the recovered emulsion, removing impurities in the emulsion, and then outputting the emulsion to the frame 1 and the strip steel 2 through the motor pump 4 and the valve 3, so as to prevent the impurities in the recovered emulsion from affecting the quality of the strip steel 2. An oil pump 15 is arranged between the clean oil tank 14 and the oil return tank 13, and emulsion in the oil return tank 13 can be quickly and effectively pumped to the clean oil tank 14 through the oil pump 15.
According to some embodiments, as shown in fig. 2, the tandem cold mill train further comprises a dam roll 16 and a thermometer 17, the dam roll 16 is disposed at the outlet of the frame 1, and the thermometer 17 measures the temperature at the outlet of the dam roll 16, so that the dam roll 16 blocks the emulsion at the inlet of the dam roll 16 and prevents the emulsion from affecting the temperature measurement.
According to further embodiments, the present application provides a control method of a cold continuous rolling mill train applied to the cold continuous rolling mill train as described above, the control method including:
step 101, acquiring the real-time temperature of the strip steel 2;
102, acquiring an ideal temperature of the strip steel 2;
103, comparing the real-time temperature with the ideal temperature, and calculating a first difference absolute value between the real-time temperature and the ideal temperature when the real-time temperature is not in the ideal temperature range;
and 104, calculating the ideal output quantity of the emulsion according to the first absolute difference value so as to output the emulsion according to the ideal output quantity.
Based on the above embodiment, the larger the first difference absolute value is, the larger the ideal output quantity is, and the smaller the first difference absolute value is, the smaller the ideal output quantity is. The absolute value of the first difference is proportional to the desired output, i.e. the higher the temperature of the strip 2, the greater the temperature required to be reduced and the more emulsion required.
Further, in step 104, after calculating a desired output amount of the emulsion according to the first absolute difference value for outputting the emulsion according to the desired output amount, the control method further includes:
105, acquiring the actual flow of the pipeline and the actual pressure of the pipeline;
step 106, calculating the actual output quantity of the emulsion according to the actual flow and the actual pressure;
step 107, comparing the actual output quantity with the ideal output quantity, and calculating a second absolute difference value between the actual output quantity and the ideal output quantity when the actual output quantity is not within the ideal output quantity range;
and step 108, adjusting the actual flow of the pipeline and the actual pressure of the pipeline according to the second absolute difference value.
Based on the above embodiment, the flow rate of the emulsion is controlled by the valve 3, and the pipeline pressure of the emulsion is controlled by the motor pump 4. The second absolute difference value is: the absolute value of the difference between the actual output quantity of the emulsion and the ideal output quantity which should be output by the emulsion after calculation by the controller. And if the second difference absolute value is larger than the set threshold value, namely the actual output quantity is not in the ideal output quantity range, the controller adjusts the actual flow of the pipeline and the actual pressure of the pipeline according to the second difference absolute value.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalence of such metes and bounds are therefore intended to be embraced by the appended claims.
Claims (10)
1. A cold continuous rolling mill train that improves temperature control accuracy, characterized by comprising:
the strip steel is rolled through the frame;
an oil tank for containing an emulsion;
one end of the valve is communicated with the oil tank through a pipeline, and the other end of the valve sprays emulsion to the rack and the strip steel through the pipeline for cooling;
and the controller acquires the real-time temperature of the strip steel and controls the amount of the emulsion output by the valve according to the real-time temperature so as to improve the control precision of the real-time temperature.
2. The cold continuous rolling mill train according to claim 1, further comprising a motor pump disposed between the valve and the oil tank and respectively communicated with the valve and the oil tank through pipes.
3. The cold continuous rolling mill train according to claim 2, further comprising a pressure gauge connected to a pipe between the motor pump and the valve for detecting a pipe pressure.
4. The cold continuous rolling mill train according to claim 1, further comprising a flow meter disposed on the pipe at the other end of the valve for detecting a pipe flow.
5. The cold continuous rolling unit according to claim 4, wherein the valves comprise a first valve, a second valve and a third valve, the pipeline connected with the output end of the first valve is used for spraying emulsion to the strip steel, and the pipeline connected with the output ends of the second valve and the third valve is used for spraying emulsion to the upper roller and the lower roller of the stand;
the flow meter comprises a first flow meter, a second flow meter and a third flow meter, the first flow meter is arranged on a pipeline at the output end of the first valve, the second flow meter is arranged on a pipeline at the output end of the second valve, and the third flow meter is arranged on a pipeline at the output end of the third valve.
6. The cold continuous rolling mill train according to claim 2, further comprising a recovery tank disposed at a lower end of the stand for recovering the emulsion sprayed at the other end of the valve.
7. The cold continuous rolling mill train according to claim 6, wherein the oil tank comprises an oil return tank which is in communication with the recovery tank through a pipe for receiving the emulsion of the recovery tank;
the oil-purifying device is characterized by further comprising a clean oil tank and an oil pump, wherein one end of the clean oil tank is communicated with the oil return tank through the oil pump, and the other end of the clean oil tank is communicated with the motor pump so that the oil pump can extract the emulsion of the oil return tank to the clean oil tank.
8. The cold continuous rolling mill train according to claim 1, further comprising a dam roll disposed at an outlet of the stand and a thermometer measuring a temperature at the outlet of the dam roll for the dam roll to block the emulsion at the inlet of the dam roll to prevent the emulsion from affecting the temperature measurement.
9. A control method of a cold continuous rolling mill train applied to the cold continuous rolling mill train according to any one of claims 1 to 8, characterized by comprising:
acquiring the real-time temperature of the strip steel;
obtaining the ideal temperature of the strip steel;
comparing the real-time temperature with the ideal temperature, and when the real-time temperature is not in the ideal temperature range, calculating a first difference absolute value of the real-time temperature and the ideal temperature;
and calculating ideal output quantity of the emulsion according to the first absolute difference value so as to output the emulsion according to the ideal output quantity.
10. The control method of claim 9, wherein after calculating a desired output of emulsion based on the first absolute difference value for outputting emulsion based on the desired output, the control method further comprises:
acquiring the actual flow of the pipeline and the actual pressure of the pipeline;
calculating the actual output quantity of the emulsion according to the actual flow and the actual pressure;
comparing the actual output quantity with the ideal output quantity, and calculating a second difference absolute value of the actual output quantity and the ideal output quantity when the actual output quantity is not in the ideal output quantity range;
and adjusting the actual flow of the pipeline and the actual pressure of the pipeline according to the second difference absolute value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211575982.8A CN115647077B (en) | 2022-12-09 | 2022-12-09 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
| PCT/CN2023/136631 WO2024120416A1 (en) | 2022-12-09 | 2023-12-06 | Cold continuous rolling unit improving temperature control precision, and control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211575982.8A CN115647077B (en) | 2022-12-09 | 2022-12-09 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115647077A true CN115647077A (en) | 2023-01-31 |
| CN115647077B CN115647077B (en) | 2023-04-18 |
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| CN202211575982.8A Active CN115647077B (en) | 2022-12-09 | 2022-12-09 | Cold continuous rolling unit for improving temperature control precision and control method thereof |
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| CN (1) | CN115647077B (en) |
| WO (1) | WO2024120416A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| WO2024120416A1 (en) | 2024-06-13 |
| CN115647077B (en) | 2023-04-18 |
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