CN113000608B - Method and device for acquiring transverse flow distribution of cooling water of working roll of rolling mill - Google Patents
Method and device for acquiring transverse flow distribution of cooling water of working roll of rolling mill Download PDFInfo
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- CN113000608B CN113000608B CN202110161266.4A CN202110161266A CN113000608B CN 113000608 B CN113000608 B CN 113000608B CN 202110161266 A CN202110161266 A CN 202110161266A CN 113000608 B CN113000608 B CN 113000608B
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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
- B21B27/10—Lubricating, cooling or heating rolls externally
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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
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally
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Abstract
The invention discloses a method and a device for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill, wherein the method comprises the following steps: acquiring the nozzle coordinate, the nozzle flow, the water spraying distance and the water spraying sector parameters of a target nozzle; then obtaining the length of the sector according to the water spraying distance and the sector parameters; then, according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle, the unit water flow and the axial cooling interval of the target nozzle are obtained; and finally, obtaining the transverse flow distribution of the cooling water tank according to the respective unit water flow and the axial cooling interval of all the nozzles. The influence of each nozzle is accurately considered in the finally obtained transverse flow distribution in the embodiment, the water flow of the nozzles is converted into the axial direction of the roller to be obtained, the precision of the whole obtaining process is higher, and the arrangement and the design of the roller cooling water tank or the nozzles can be effectively guided.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a method and a device for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill.
Background
The transverse flow distribution of the cooling water of the hot continuous rolling finish rolling working roll directly determines parameters such as the surface oxide film state of the roll, the hot crown of the roll and the like, and is one of the most key factors influencing the surface quality and the plate shape quality of high-end products. At present, the transverse flow distribution of the cooling water of the roller is determined by taking the transverse flow distribution of the nozzle as a reference. However, due to the fact that the actual working environment of the nozzle is complex, qualitative analysis is conducted by the nozzle flow only when the flow distribution condition of the nozzle is determined, accuracy is low, errors are large, the requirement for fine control of the cooling water of the roller cannot be met, and production of high-end products is limited.
Therefore, the method for determining the distribution condition of the cooling flow of the roller in the prior art has the problems of low precision and large error, and cannot meet the production requirement of rolling high-end products.
Disclosure of Invention
In view of the above problems, the invention provides a method and a device for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill.
In a first aspect, the present application provides the following technical solutions through an embodiment:
a method for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill comprises the following steps:
acquiring the nozzle coordinate, the nozzle flow, the water spraying distance and the water spraying sector parameters of a target nozzle; the water spraying distance is the distance between a nozzle and the roller, and the target nozzle is any nozzle on a roller cooling water tank;
obtaining the length of the sector according to the water spraying distance and the sector parameters; the length of the sector is the tangent length of the sector of the water flow sprayed by the nozzle and the surface of the roller; obtaining unit water flow and an axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector tangent to the surface of the roller and the axial direction of the roller; and obtaining the transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles.
Optionally, the sector parameters include: when the water spraying distance is a first distance, the width of the water flow fan surface is a first length, and when the water spraying distance is a second distance, the width of the water flow fan surface is a second length; the obtaining of the sector length according to the water spraying distance and the sector parameters comprises:
according to the formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein d is i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is the second length, h 1 Is a first distance, h 2 Is the second distance.
Optionally, obtaining an axial cooling interval of the target nozzle includes:
obtaining the axial cooling length according to the sector length and the tangent included angle; wherein the axial cooling length is the projection length of the sector length in the axial direction of the roller; and obtaining the axial cooling interval according to the axial cooling length and the nozzle coordinate.
Optionally, obtaining the axial cooling interval according to the axial cooling length and the nozzle coordinate includes:
according to [ x ] i -L i /2，x i +L i /2]Determining the axial cooling interval; wherein x is i Is the nozzle coordinate, L i Is the axial cooling length.
Optionally, obtaining a unit water flow rate of the target nozzle comprises:
according to f i ＝F i /L i Determining the unit water flow; wherein f is i Is unit water flow rate, F i Is the nozzle flow rate, L i Is the axial cooling length.
Optionally, the obtaining a transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles includes:
dividing the roll into a plurality of computing units in the axial direction; wherein each calculation unit is a unit length; acquiring one or more nozzles corresponding to the target unit; wherein the target unit is any one of the plurality of computing units; obtaining a unit flow sum of the target unit according to the unit water flow of the one or more nozzles; and obtaining the transverse flow distribution of the cooling water tank according to the unit flow sum.
Optionally, the length of the computing unit is 1mm.
A device for obtaining the transverse flow distribution of cooling water of a working roll of a rolling mill comprises:
the parameter acquisition module is used for acquiring nozzle coordinates, nozzle flow, water spraying distance and water spraying sector parameters of the target nozzle; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank; the first obtaining module is used for obtaining the length of the sector according to the water spraying distance and the sector parameters; the length of the sector is the tangent length of the sector of the water flow sprayed by the nozzle and the surface of the roller; the second obtaining module is used for obtaining the unit water flow and the axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector tangent to the surface of the roller and the axial direction of the roller; and the flow obtaining module is used for obtaining the transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles.
Optionally, the sector parameters include: when the water spraying distance is a first distance, the width of the water flow fan surface is a first length, and when the water spraying distance is a second distance, the width of the water flow fan surface is a second length; the first obtaining module is specifically configured to:
according to formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein d is i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is a second length, h 1 Is a first distance, h 2 Is the second distance.
In a second aspect, based on the same inventive concept, the present application provides the following technical solutions through an embodiment:
a cooling water lateral flow profile acquisition apparatus for a rolling mill work roll comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the apparatus to perform the steps of the method of any one of the first aspects above.
The embodiment of the invention provides a method and a device for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill, wherein the method comprises the steps of acquiring the nozzle coordinate of a target nozzle, the nozzle flow, the water spraying distance and the sector parameters of water spraying; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank; then obtaining the length of the sector according to the water spraying distance and the sector parameters; the sector length is the tangent length of the water flow sector sprayed by the nozzle and the surface of the roller; then, according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle, the unit water flow and the axial cooling interval of the target nozzle are obtained; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line of the water flow sector and the surface of the roller is the included angle of the axial direction of the roller; therefore, the water flow of all the nozzles in an interval can be comprehensively considered; and finally, obtaining the transverse flow distribution of the cooling water tank according to the respective unit water flow and the axial cooling interval of all the nozzles. The influence of each nozzle is accurately considered in the finally obtained transverse flow distribution in the embodiment, and the water flow of the nozzles is converted into the axial direction of the roller to be obtained, so that the flow distribution result is higher in precision, and the arrangement and design of the roller cooling water tank or the nozzles can be effectively guided.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts. In the drawings:
fig. 1 is a flowchart illustrating a method for obtaining a transverse flow distribution of cooling water of a work roll of a rolling mill according to a first embodiment of the present invention;
figure 2 shows a schematic view of the water flow sector of a nozzle in a first embodiment of the invention;
FIG. 3 is a schematic view showing the lateral flow distribution in example 1 of the first embodiment of the present invention;
FIG. 4 is a schematic view showing the lateral flow distribution in example 2 of the first embodiment of the present invention;
fig. 5 shows a schematic structural diagram of a cooling water transverse flow distribution obtaining device for a rolling mill work roll according to a second embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
First embodiment
Referring to fig. 1, fig. 1 is a flowchart illustrating a method for obtaining a transverse flow distribution of cooling water for a work roll of a rolling mill according to a first embodiment of the present invention. Specifically, the method comprises the following steps:
step S10: acquiring nozzle coordinates, nozzle flow, water spraying distance and water spraying sector parameters of a target nozzle; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank.
In step S10, the nozzle coordinates may be determined by constructing a spatial coordinate system, and may be referenced during the subsequent method execution. The origin position selected for constructing the spatial coordinate system is not limited, and may be, for example, the center position of the roll. The cooling water tank is connected with a plurality of nozzles. The nozzles may be the same or different. The flow rate of the nozzle can be adjusted or not adjusted without limitation. In the embodiment, the water flow sprayed by the nozzle is in a flat sector shape and is aligned with the roller. The water spraying direction can be opposite spraying or inclined spraying. The fan parameters may include the distance of the water spray from the nozzle and the length of the water flow fan at the corresponding distance. For example, at least two sets of data are included in the fan parameters: the width of the water flow sector is a first length when the water spraying distance is a first distance, and the width of the water flow sector is a second length when the water spraying distance is a second distance.
Step S20: obtaining the length of the sector according to the water spraying distance and the sector parameters; the length of the sector is the tangent length of the water flow sector sprayed by the nozzle and the surface of the roller.
In step S20, according to formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein d is i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is a second length, h 1 Is a first distance, h 2 For the second distance, please refer to fig. 2 for the specific form of the sector length.
Step S30: obtaining unit water flow and an axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle; the unit water flow is the water flow of the unit length in the axial direction of the roller, and the included angle of the tangent lines is the included angle of the tangent line of the water flow sector and the surface of the roller and the axial direction of the roller.
In step S30, since the nozzle flow rate is fixed during spraying, the distance between the nozzle and the roll surface affects the cooling effect on the roll. For example, when the distance is long, the amount of water per unit length sprayed on the roll is small for a certain nozzle, and vice versa. Therefore, the distribution of the water flow is accurately determined by calculating the unit water flow of each nozzle in the application. The method comprises the following specific steps:
according to f i ＝F i /L i Determining unit water flow; wherein f is i Is unit water flow rate, F i Is the nozzle flow rate, L i Is the axial cooling length.
Then, because the arrangement angle of the nozzles is possibly arranged to form a certain included angle with the axial direction of the roller, a certain included angle is formed between the sprayed water flow sector and the axial direction of the roller. In practical application scenarios, the position of the roller for rolling the strip steel is cylindrical, and the diameter of the roller is larger, so that the near-sighted surface of the roller can be treated as a plane relative to the water flow sector formed by the nozzle. Therefore, even if the water flow sector and the tangent of the roll surface have a certain included angle with the roll axis, the total amount of cooling water received by the roll in the same axial region is almost constant. Further, the water flow distribution of each nozzle in the embodiment can be converted to the axial direction of the roller for processing and flow distribution expression, that is, the axial cooling interval is obtained by the sector length.
Specifically, the axial cooling length is obtained according to the sector length and the tangent included angle; the axial cooling length is the projection length of the sector length in the axial direction of the roller; then, an axial cooling interval is obtained from the axial cooling length and the nozzle coordinate. In this embodiment, the two axial cold-defect regions can be expressed as [ x ] i -L i /2，x i +L i /2]Wherein x is i As nozzle coordinate, L i Is the axial cooling length.
The axial cooling interval of each nozzle to which the cooling water tank is connected can be determined through step S30. The accuracy of obtaining the flow distribution can be improved.
Step S40: and obtaining the transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles.
In step S40, the specific implementation is as follows:
firstly, dividing a roller into a plurality of calculation units in the axial direction; wherein each calculation unit is a unit length; for example, the unit length may be 1mm. Then, acquiring one or more nozzles corresponding to the target unit; wherein the target unit is any one of a plurality of computing units; in the actual cooling process, a plurality of nozzles may spray cooling water to one target unit, so that the unit flow sum of the target unit can be obtained according to the unit water flow of one or more nozzles. The unit flow sum, i.e. the nozzles that have all influence on this area, is taken into account, an accurate determination of the flow distribution is achieved. And finally, finishing the unit flow and acquisition corresponding to all the calculation units in the axial direction of the roller, and obtaining the transverse flow distribution condition of the cooling water tank.
Examples are as follows:
example 1: this example is to obtain the transverse water distribution of the roll cooling water at the mill outlet. The cooling water tank has three rows of nozzle groups, each row of water spraying group has 43 nozzles, and the nozzles of the three rows of nozzle groups are arranged in a cross way at a distance of 50mm. When the nozzle is spaced 250mm from the roller, the length of the water flow is 220mm, and when the nozzle is spaced 500mm from the roller, the length of the water flow is 440mm. The included angle between the tangent line of the water flow sector and the surface of the roller and the axial direction of the roller is 5 degrees. The three-row water spraying nozzle model is as the following table 1:
TABLE 1
| Nozzle numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| First row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Second row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Third row (type) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Nozzle numbering | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | |
| First row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Second row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Third row (type) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Wherein, the flow rate of the 1-type nozzle is 44.72L/min under the pressure of 1 MPa; the flow rate of the type 2 nozzle is 55.9L/min under the pressure of 1 MPa.
For the sake of illustration, the procedure of the method is only illustrated in this example for the first water-jet-discharge group, and the other nozzles can be obtained by analogy.
Firstly, taking the axial center of the roll cooling water tank as a zero point of a coordinate and the axial direction as a coordinate axis, and taking the zero point as a reference, determining the position x of each nozzle in the first row of nozzles in the coordinate i . According to the equipment drawing, the nozzle at the leftmost side of the nozzle group in the row is numbered as 1, and the coordinate of the nozzle in the space is x i 1033, on the basis of which, according to the nozzle pitch, the spatial position of the water jet array is calculated as follows:
TABLE 2
| Nozzle numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Coordinate position | -1033 | -983 | -933 | -883 | -833 | -783 | -733 | -683 | -633 | -583 | -533 | -483 | -433 | -383 | -333 |
| Nozzle numbering | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Coordinate position | -283 | -233 | -183 | -133 | -83 | -33 | 17 | 67 | 117 | 167 | 217 | 267 | 317 | 367 | 417 |
| Nozzle numbering | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | ||
| Coordinate position | 467 | 517 | 567 | 617 | 667 | 717 | 767 | 817 | 867 | 917 | 967 | 1017 | 1067 |
Further, with the first nozzle in the first nozzle row group as the research object, if the nozzle is spaced 400mm from the roll, based on the information provided by the nozzle supplier, i.e. when the nozzle is spaced 250mm from the roll, the water flow length is 220mm, and when the nozzle is spaced 500mm from the roll, the water flow length is 440mm, the length d of the sector length mapped to the axial direction of the roll is calculated 1 Is 352mm. The included angle of the tangent lines is 5 degrees, the jet flow sector of the nozzle is mapped to the axial cooling length L of the roller 1 Comprises the following steps:
L 1 ＝d 1 *cos(5*π/180)＝352*cos(5*π/180)＝350.66。
unit water flow rate f 1 Is the nozzle flow F 1 And L 1 The ratio of (a) to (b), i.e.:
f 1 ＝F 1 /L 1 ＝44.72/350.66＝0.12753L/min*mm。
according to the method, the axial cooling length and the unit water flow of all the nozzle water flow sectors mapped to the axial direction of the roller are calculated.
Further, according to the above calculation results, taking the first nozzle of the first water discharge group as an example, the axial cooling interval of the nozzle acting in the axial direction of the roll is found to be:
[x 1 -L 1 /2，x 1 +L 1 /2]＝[-1033-350.66/2，-1033+350.66/2]＝[-1208.33，-857.67]。
further, the above process is repeated, and the axial cooling interval in which all the nozzles act on the axial direction of the roller is calculated.
Finally, the roll was discretized by 1mm and divided into a plurality of computing units. Indexing the nozzles for each computing unit from the extreme end of the negative coordinate direction of the roll to the positive coordinate direction; and accumulating the unit length water flow of all nozzles corresponding to the calculation unit of the current index to obtain the unit flow sum of the current calculation unit. And finishing the unit flow and acquisition of all the calculation units, and obtaining the water distribution in the length direction of the outlet roller. The calculation results for the nozzle configuration in this example are shown in fig. 3, where the width position is the axial length position of the roll.
Example 2: this example is a calculation of the transverse water distribution of the roll cooling water at the mill outlet. The three rows of water spray nozzles are of the type shown in the following table 3:
TABLE 3
| Nozzle numbering | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| First row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 1 |
| Second row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 1 | 2 |
| Third row (type) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 1 | 2 | 1 | 1 | 2 | 2 |
| Nozzle numbering | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | |
| First row (type) | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Second row (type) | 1 | 1 | 2 | 1 | 2 | 2 | 1 | 1 | 2 | 2 | 1 | 2 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Third row (type) | 2 | 1 | 1 | 2 | 1 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Wherein, the flow rate of the 1-type nozzle is 44.72L/min under the pressure of 1 MPa; the flow rate of the type 2 nozzle is 55.9L/min under the pressure of 1 MPa. The procedure was carried out as in example 1, and the water distribution results obtained finally are shown in FIG. 4.
In summary, in the method for acquiring the transverse flow distribution of cooling water for the work roll of the rolling mill provided in this embodiment, the nozzle coordinates of the target nozzle, the nozzle flow, the water spraying distance, and the fan parameters of the water spraying are acquired; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank; then obtaining the length of the sector according to the water spraying distance and the sector parameters; the sector length is the tangent length of the water flow sector sprayed by the nozzle and the surface of the roller; then according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle, obtaining the unit water flow and the axial cooling interval of the target nozzle; the unit water flow is the water flow of the unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector and the surface of the roller and the axial direction of the roller; therefore, the water flow of all the nozzles in one interval can be comprehensively considered; and finally, obtaining the transverse flow distribution of the cooling water tank according to the respective unit water flow and the axial cooling interval of all the nozzles. The influence of each nozzle is accurately considered in the finally obtained transverse flow distribution in the embodiment, and the water flow of the nozzles is converted into the axial direction of the roller to be obtained, so that the flow distribution result is higher in precision, and the arrangement and design of the roller cooling water tank or the nozzles can be effectively guided.
Second embodiment
Referring to fig. 5, a second embodiment of the present invention provides a device 300 for obtaining the lateral flow distribution of cooling water for the work rolls of a rolling mill based on the same inventive concept.
The device 300 for acquiring the transverse flow distribution of cooling water of the working roll of the rolling mill comprises:
the parameter acquisition module 301 is configured to acquire nozzle coordinates of the target nozzle, nozzle flow, water spraying distance, and sector parameters of water spraying; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank;
a first obtaining module 302, configured to obtain a sector length according to the water spraying distance and the sector parameter; the sector length is the tangent length of the water flow sector sprayed by the nozzle and the surface of the roller;
a second obtaining module 303, configured to obtain a unit water flow rate and an axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow rate, the sector length, and a tangent included angle; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector tangent to the surface of the roller and the axial direction of the roller;
a flow obtaining module 304, configured to obtain a lateral flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of each of all the nozzles.
As an alternative embodiment, the sector parameters include: when the water spraying distance is a first distance, the width of the water flow fan surface is a first length, and when the water spraying distance is a second distance, the width of the water flow fan surface is a second length; the first obtaining module 302 is specifically configured to: according to formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein d is i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is a second length, h 1 Is a first distance, h 2 Is the second distance.
As an optional implementation manner, the second obtaining module 303 is specifically configured to:
obtaining the axial cooling length according to the sector length and the tangent included angle; wherein the axial cooling length is the projection length of the sector length in the axial direction of the roller; and obtaining the axial cooling interval according to the axial cooling length and the nozzle coordinate.
As an optional implementation manner, the second obtaining module 303 is specifically configured to:
according to [ x ] i -L i /2，x i +L i /2]Determining the axial cooling interval; wherein x is i Is the nozzle coordinate, L i Is the axial cooling length.
As an optional implementation manner, the second obtaining module 303 is specifically configured to:
according to f i ＝F i /L i Determining the unit water flow rate; wherein f is i Is unit water flow rate, F i Is the nozzle flow rate, L i Is the axial cooling length.
As an optional implementation manner, the traffic obtaining module 304 is specifically configured to:
dividing the roll into a plurality of computing units in the axial direction; wherein each calculation unit is a unit length; acquiring one or more nozzles corresponding to the target unit; wherein the target unit is any one of the plurality of computing units; obtaining a unit flow sum of the target unit according to the unit water flow of the one or more nozzles; and obtaining the transverse flow distribution of the cooling water tank according to the unit flow sum.
As an alternative embodiment, the length of the computing unit is 1mm.
It should be noted that the embodiment of the present invention provides the device 300 for obtaining the transverse flow distribution of cooling water for the work rolls of a rolling mill, which is implemented and produces the same technical effects as the foregoing method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiments for what the device embodiments do not refer to in part.
Third embodiment
Based on the same inventive concept, a third embodiment of the present invention further provides a device for obtaining a lateral flow distribution of cooling water of a rolling mill work roll, comprising a processor and a memory, the memory being coupled to the processor, the memory storing instructions that, when executed by the processor, cause the device to perform the steps of the method according to any one of the first aspect.
It should be noted that, in the device for obtaining the transverse flow distribution of cooling water for the work rolls of the rolling mill provided in the embodiment of the present invention, the specific implementation and the resulting technical effects of each step are the same as those of the foregoing method embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiment for the non-mentioned points of the present embodiment.
The term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship; the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for acquiring the transverse flow distribution of cooling water of a working roll of a rolling mill is characterized by comprising the following steps:
acquiring the nozzle coordinate, the nozzle flow, the water spraying distance and the water spraying sector parameters of a target nozzle; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank;
obtaining the length of the sector according to the water spraying distance and the sector parameters; the length of the sector is the tangent length of the sector of the water flow sprayed by the nozzle and the surface of the roller;
obtaining unit water flow and an axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector tangent to the surface of the roller and the axial direction of the roller;
and obtaining the transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles.
2. The method of claim 1, wherein the sector parameters comprise: when the water spraying distance is a first distance, the width of the water flow fan surface is a first length, and when the water spraying distance is a second distance, the width of the water flow fan surface is a second length; the obtaining of the sector length according to the water spraying distance and the sector parameters comprises:
according to the formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein d is i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is a second length, h 1 Is a first distance, h 2 Is the second distance.
3. The method of claim 1, wherein obtaining an axial cooling interval for the target nozzle comprises:
obtaining the axial cooling length according to the sector length and the tangent included angle; wherein the axial cooling length is the projection length of the sector length in the axial direction of the roller;
and obtaining the axial cooling interval according to the axial cooling length and the nozzle coordinate.
4. The method of claim 3, wherein obtaining the axial cooling interval from the axial cooling length and the nozzle coordinate comprises:
according to [ x ] i -L i /2，x i +L i /2]Determining the axial cooling interval; wherein x is i As nozzle coordinate, L i Is the axial cooling length.
5. The method of claim 1, wherein obtaining a unit water flow rate for the target nozzle comprises:
according to f i ＝F i /L i Determining the unit water flow rate; wherein f is i Is unit water flow rate, F i Is the nozzle flow rate, L i Is the axial cooling length.
6. The method of claim 1, wherein obtaining a transverse flow distribution of the cooling water tank based on the unit water flow and the axial cooling interval for each of all the nozzles comprises:
dividing the roll into a plurality of computing units in the axial direction; wherein each calculation unit is a unit length;
acquiring one or more nozzles corresponding to the target unit; wherein the target unit is any one of the plurality of computing units;
obtaining a unit flow sum of the target unit according to the unit water flow of the one or more nozzles;
and obtaining the transverse flow distribution of the cooling water tank according to the unit flow sum.
7. The method of claim 6, wherein the computing unit is 1mm in length.
8. A device for obtaining the transverse flow distribution of cooling water of a working roll of a rolling mill is characterized by comprising:
the parameter acquisition module is used for acquiring the nozzle coordinates, the nozzle flow, the water spraying distance and the water spraying sector parameters of the target nozzle; the water spraying distance is the distance between the nozzle and the roller, and the target nozzle is any nozzle on the roller cooling water tank;
the first obtaining module is used for obtaining the length of the sector according to the water spraying distance and the sector parameters; the sector length is the tangent length of the water flow sector sprayed by the nozzle and the surface of the roller;
the second obtaining module is used for obtaining the unit water flow and the axial cooling interval of the target nozzle according to the nozzle coordinate, the nozzle flow, the sector length and the tangent included angle; the unit water flow is the water flow of unit length in the axial direction of the roller, and the included angle of the tangent line is the included angle of the tangent line of the water flow sector tangent to the surface of the roller and the axial direction of the roller;
and the flow acquisition module is used for acquiring the transverse flow distribution of the cooling water tank according to the unit water flow and the axial cooling interval of all the nozzles.
9. The apparatus of claim 8, wherein the sector parameters comprise: when the water spraying distance is a first distance, the width of the water flow fan surface is a first length, and when the water spraying distance is a second distance, the width of the water flow fan surface is a second length; the first obtaining module is specifically configured to:
according to formula d i ＝h*(d 2 -d 1 )/(h 2 -h 1 ) Obtaining the length of the sector; wherein, d i Is the length of the sector, h is the water spraying distance, d 1 Is a first length, d 2 Is a second length, h 1 Is a first distance, h 2 Is the second distance.
10. A cooling water lateral flow profile acquisition device for a rolling mill work roll comprising a processor and a memory coupled to the processor, the memory storing instructions that, when executed by the processor, cause the device to perform the steps of the method of any one of claims 1-7.
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| WO2007026906A1 (en) * | 2005-08-30 | 2007-03-08 | Jfe Steel Corporation | Cooling facility and cooling method of steel plate |
| JP4047893B2 (en) * | 2006-05-08 | 2008-02-13 | 新日本製鐵株式会社 | Hot steel plate cooling device, hot steel plate cooling method and program |
| US8012406B2 (en) * | 2006-09-12 | 2011-09-06 | Nippon Steel Corporation | Method of arranging and setting spray cooling nozzles and hot steel plate cooling apparatus |
| JP4238260B2 (en) * | 2006-09-19 | 2009-03-18 | 新日本製鐵株式会社 | Steel plate cooling method |
| JP5825250B2 (en) * | 2012-12-25 | 2015-12-02 | Ｊｆｅスチール株式会社 | Method and apparatus for cooling hot-rolled steel strip |
| CN108160721B (en) * | 2017-12-07 | 2019-03-22 | 燕山大学 | A kind of emulsion spray frame top nozzle spacing and nozzle quantity comprehensive optimization method |
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