CN210208576U - Variable-convexity crystallizer copper pipe - Google Patents
Variable-convexity crystallizer copper pipe Download PDFInfo
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- CN210208576U CN210208576U CN201920741439.8U CN201920741439U CN210208576U CN 210208576 U CN210208576 U CN 210208576U CN 201920741439 U CN201920741439 U CN 201920741439U CN 210208576 U CN210208576 U CN 210208576U
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- copper tube
- copper pipe
- copper
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- wall
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 145
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 145
- 239000010949 copper Substances 0.000 title claims abstract description 145
- 230000007704 transition Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 13
- 239000010959 steel Substances 0.000 abstract description 13
- 239000000498 cooling water Substances 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 7
- 238000009749 continuous casting Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract description 5
- 229910000975 Carbon steel Inorganic materials 0.000 abstract description 4
- 229910000677 High-carbon steel Inorganic materials 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000005266 casting Methods 0.000 description 8
- 239000002436 steel type Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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- Continuous Casting (AREA)
Abstract
The utility model relates to a variable convexity crystallizer copper pipe belongs to continuous casting technical field. Along the moving direction of the blank shell, the inner wall surface of the copper pipe is a continuous arc-shaped section, and the outer wall surface is formed by connecting a plurality of inclined surface sections with different slopes, so that the wall thickness of the copper pipe is changed along a certain rule in the height direction. When different steel grades are cast, the dynamic change of the convexity of the copper tube along with the steel grades and the drawing speed in the blank drawing process can be realized by applying different cooling water pressures in a matching way, so that the copper tube not only adapts to the high drawing speed of low-carbon steel and plain carbon steel, but also is compatible with the conventional drawing speed of medium-high carbon steel.
Description
Technical Field
The utility model belongs to the technical field of continuous casting, concretely relates to variable convexity crystallizer copper pipe.
Background
The benefits of the domestic steel industry are reduced, cost reduction and efficiency improvement are important ways for the survival and development of steel enterprises, and the high-speed continuous casting technology can reduce the flow number of continuous casting machines and reduce the construction investment and the production operation cost. In recent years, many steel enterprises have been expected to increase the continuous casting speed, especially in billet continuous casting. The crystallizer is the key to determining whether high speeds can be achieved. After the molten steel is cast into the crystallizer, the molten steel is solidified in a short time to form a uniform thickness of a shell and is safely transferred to the secondary cooling zone.
Because the copper tubes of the small square billet crystallizer are all in a tube structure, the copper tubes only have one taper. But products of a plurality of steel plants change along with market demands, a plurality of steel grades are cast by the same casting machine, the component span of the steel grades is large, and continuous casting from low-carbon steel to high-carbon steel is carried out in one casting time. On the premise of generally requiring to improve the drawing speed at present, whether the taper of the copper pipe can adapt to the high drawing speed of low-carbon steel and plain carbon steel or not is compatible with the conventional drawing speed of medium-high carbon steel, and the copper pipe becomes a pain point for the development of the current small square billet crystallizer.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a variable crown crystallizer copper tube, which realizes dynamic variation of the crown of the copper tube along with the steel grade and the drawing speed in the blank drawing process, so as to adapt to the high drawing speed of low-carbon steel and common-carbon steel, and the conventional drawing speed of medium-carbon steel and high-carbon steel.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a crystallizer copper pipe with variable convexity is characterized in that the section of the copper pipe is rectangular; along the blank shell moving direction, the outer wall of the copper pipe is sequentially divided into a plurality of sections with different slopes from top to bottom, and the wall thickness of the copper pipe is gradually reduced from the upper opening to the lower opening.
Furthermore, the inner cavity of the copper tube is gradually reduced from the upper opening to the lower opening.
Furthermore, the adjacent sections on the outer wall of the copper pipe are in arc transition.
Furthermore, the outer wall of the copper pipe is at least divided into two inclined surface sections, and the adjacent inclined surface sections are smoothly connected in a tangent mode by adopting cambered surfaces.
Furthermore, the outer wall of the copper pipe is provided with two inclined surface sections from top to bottom, and the wall thickness of the copper pipe meets the requirements that D1 is larger than D3 is larger than D2;
wherein D1 is the wall thickness of the upper opening of the copper pipe, and D1 is 10-20 mm in size;
d2 is the wall thickness of the lower opening of the copper pipe, D2 is 20% -50% of D1;
d3 is the copper tube wall thickness horizontally corresponding to the intersection of the two inclined surface sections;
h is the vertical height from the upper opening of the copper pipe to the lower opening of the copper pipe, and the size of H is 600-1200 mm;
h1 is the vertical height from the upper opening of the copper pipe to the intersection of the two inclined surface sections, and H1 is 20% -50% of H.
Furthermore, the size of a fillet of an inner cavity of the copper pipe is R1, and R1 is 3% -16% of the side length of the casting blank.
Further, the width of the inner cavity of the upper opening of the copper pipe is 2-3 mm larger than that of the inner cavity of the lower opening of the copper pipe, the length of the inner cavity of the upper opening of the copper pipe is 2-3 mm larger than that of the lower opening of the copper pipe, and the width of the inner cavity of the lower opening of the copper pipe and the length of the inner cavity are 90-200 mm.
The beneficial effects of the utility model reside in that:
additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic cross-sectional view of a copper tube of a variable crown crystallizer;
FIG. 2 is a schematic longitudinal cross-sectional view of a copper tube of a variable crown crystallizer;
FIG. 3 is a schematic longitudinal cross-sectional view of the wall thickness of the copper pipe according to the first embodiment;
FIG. 4 is a schematic longitudinal sectional view of the wall thickness of the copper tube according to the second embodiment.
Reference numerals: copper pipe upper port-1; a copper pipe lower opening-2; a first side wall-3; a second side wall-4; a fold line-5; a fold line-6; arc-7; arc-8; a fold line-9; a fold line-10; arc-11.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Please refer to fig. 1 to 4. A crystallizer copper pipe with variable convexity is characterized in that a pair of first side walls 3 arranged oppositely and a pair of second side walls 4 arranged oppositely enclose a cavity structure with a rectangular cross section, the upper end of the cavity structure is provided with an upper opening 1 of the copper pipe, and the lower end of the cavity structure is provided with a lower opening 2 of the copper pipe; the inner cavity of the copper pipe is gradually reduced from the upper opening to the lower opening; the adjacent first and second side walls 3 and 4 are rounded. Along the moving direction of the blank shell, the outer wall of the copper pipe is sequentially divided into a plurality of sections with different slopes from top to bottom, and adjacent sections on the outer wall of the copper pipe are in arc transition; the wall thickness of the copper pipe is gradually reduced from the upper opening to the lower opening.
The curve of the outer wall of the copper pipe in the longitudinal direction from the upper opening 1 of the copper pipe to the lower opening 2 of the copper pipe has various implementation forms, and can be adjusted according to the type of cast steel and the pulling speed. In the following, a side wall of the copper tube of the crystallizer will be described as an example, and the other three side walls are the same as the side wall. The adjacent inclined plane sections on the outer wall of the copper pipe are in arc transition, so that the stress condition of the copper pipe can be avoided, and the stress concentration is avoided.
The method for changing the convexity of the copper pipe of the crystallizer mainly comprises the following steps:
(1) according to the casting steel types and the drawing speed ranges corresponding to the steel types, determining the optimal solidification shrinkage interval of the corresponding steel type in the copper pipe in the corresponding drawing speed range;
(2) according to the determined optimal solidification shrinkage interval, the outer wall of the copper pipe is correspondingly divided into a plurality of sections with different slopes along the moving direction of the blank shell, and the inner wall of the copper pipe is a continuous arc-shaped section from the upper opening to the lower opening, so that the wall thickness of the copper pipe is gradually reduced from the upper opening to the lower opening;
(3) when different steel types are cast, different cooling water pressures are applied in a matching manner, so that the copper pipe generates micro deformation under the action of the cooling water pressure.
The copper pipe convexity change in the method is essentially to change the wall deformation of the copper pipe (the wall deformation of the copper pipe causes the change of the taper of the inner cavity of the copper pipe), and the method is realized from two aspects of changing the wall thickness of the copper pipe and adjusting the pressure of cooling water, namely, the purpose of' the taper of the inner cavity of the copper pipe required by different steel types is realized through combined regulation and control, so that the change rule of the copper pipe in the height direction is consistent with the required taper of the copper pipe, and the casting process is dynamically adapted.
Specifically, the method comprises the following steps: along the moving direction of the blank shell (from the upper opening to the lower opening), the inner wall surface of the copper pipe is a continuous arc-shaped section, and the outer wall surface is formed by connecting a plurality of inclined surface sections with different slopes, so that the wall thickness of the copper pipe can be changed along a certain rule in the height direction, namely different heights, and the wall thickness of the copper pipe is different. The wall thickness of the copper pipe of the partial section is reduced more quickly, and the wall thickness of the copper pipe of the partial section is reduced more slowly; when different steel types are cast, different cooling water pressures are applied in a matching manner, so that different deformation quantities of the copper pipe wall can be generated by different cooling water pressures, under the same cooling water pressure, the deformation quantity of the copper pipe wall is larger at the position with a thin wall thickness, and the deformation quantity of the copper pipe wall is smaller at the position with a thicker wall thickness; because the deformation of different copper tube wall thicknesses under different cooling water pressures is different, the convexity of the crystallizer copper tube can be dynamically adjusted along with the steel grade and the drawing speed in the blank drawing process, so that the copper tube not only is suitable for the high drawing speed of low-carbon steel and common-carbon steel, but also is compatible with the conventional drawing speed of medium-carbon steel.
The first embodiment is as follows:
comprises a fold line 5 and a fold line 6, wherein the fold line 5 and the fold line 6 are smoothly connected in a tangent mode by adopting an arc line 7; the arc line is one of a circular arc line, a hyperbolic line or a parabolic line. The fold line 5 and the fold line 6 are projections of two inclined plane sections on the outer wall of the copper pipe, and the arc line 7 is a projection of an arc surface between the two inclined plane sections on the outer wall of the copper pipe.
At the moment, the projection size of each section on the outer wall of the copper pipe should meet the requirements of D1> D3> D2;
wherein D1 is the wall thickness of the upper opening of the copper pipe, and D1 is 10-20 mm in size;
d2 is the wall thickness of the lower opening of the copper pipe, D2 is 20% -50% of D1;
d3 is the wall thickness of the copper pipe horizontally corresponding to the intersection of the folding line 5 and the folding line 6;
h is the vertical height from the upper opening of the copper pipe to the lower opening of the copper pipe, and the size of H is 600-1200 mm;
h1 is the vertical height from the upper mouth of the copper tube to the intersection of the fold line 5 and the fold line 6, and H1 is 20-50% of H.
Preferably, the fillet size of the inner cavity of the copper pipe is R1, and R1 is 3% -16% of the side length of the casting blank (the wide side of the pipe with the rectangular section).
Preferably, the width l of the inner cavity of the upper opening of the copper pipe11Width l of inner cavity of lower opening of copper pipe122-3 mm in size and length l of inner cavity of upper opening of copper pipe21Length l of inner cavity of lower opening of copper pipe222-3 mm in size, and the width of the inner cavity of the lower opening of the copper pipe and the length of the inner cavity are 90-200 mm.
Example two:
the device comprises an arc line 8, a broken line 9, a broken line 10 and an arc line 11 from top to bottom in sequence, wherein the arc line 8 is tangent to the broken line 9, and the broken line 9 and the broken line 10 are smoothly connected in a tangent mode by the arc line 11; the arc line is one of a circular arc line, a hyperbolic line or a parabolic line. Similarly, the broken line 9 and the broken line 10 are projections of two inclined surface sections on the outer wall of the copper pipe, and the arc line 8 and the arc line 11 are projections of an arc surface connected with the two inclined surface sections.
At the moment, the projection size of each section on the outer wall of the copper pipe should meet the requirements of D1> D3> D4> D2, H > H2> H1;
wherein D1 is the wall thickness of the upper opening of the copper pipe, and D1 is 10-20 mm in size;
d2 is the wall thickness of the lower opening of the copper pipe, D2 is 20% -50% of D1;
d3 is the copper pipe wall thickness horizontally corresponding to the connection of the arc line 8 and the fold line 9;
d4 is the wall thickness of the copper pipe horizontally corresponding to the intersection of the folding line 9 and the folding line 10;
h is the vertical height from the upper opening of the copper pipe to the lower opening of the copper pipe, and the size of H is 600-1200 mm;
h1 is the vertical height from the upper opening of the copper pipe to the joint of the arc line 8 and the fold line 9, and H1 is 20-50% of H;
h2 is the vertical height from the junction of arc 8 and fold 9 to the junction of fold 9 and fold 10.
Preferably, the fillet size of the inner cavity of the copper pipe is R1, and R1 is 3% -16% of the side length of the casting blank (the wide side of the pipe with the rectangular section).
Preferably, the width l of the inner cavity of the upper opening of the copper pipe11Width l of inner cavity of lower opening of copper pipe122-3 mm in size and length l of inner cavity of upper opening of copper pipe21Length l of inner cavity of lower opening of copper pipe222-3 mm in size, and the width of the inner cavity of the lower opening of the copper pipe and the length of the inner cavity are 90-200 mm.
In the two embodiments, when the length and the width of the upper opening and the lower opening of the copper pipe are equal, the copper pipe is a square pipe, and when the length and the width are not equal, the copper pipe is a rectangular pipe.
The scheme changes the deformation of the inner wall of the copper pipe by changing the wall thickness of the copper pipe along a certain rule in the height direction and applying different cooling water pressures to different steel grades, so that the change rule of the inner wall of the copper pipe in the height direction is consistent with the required taper, and the copper pipe dynamically adapts to the casting process, thereby effectively overcoming various defects in the prior art and having high industrial utilization value.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920741439.8U CN210208576U (en) | 2019-05-22 | 2019-05-22 | Variable-convexity crystallizer copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920741439.8U CN210208576U (en) | 2019-05-22 | 2019-05-22 | Variable-convexity crystallizer copper pipe |
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| Publication Number | Publication Date |
|---|---|
| CN210208576U true CN210208576U (en) | 2020-03-31 |
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| CN201920741439.8U Withdrawn - After Issue CN210208576U (en) | 2019-05-22 | 2019-05-22 | Variable-convexity crystallizer copper pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076303A (en) * | 2019-05-22 | 2019-08-02 | 中冶赛迪工程技术股份有限公司 | Change the method and variable convex crystallizer copper pipe of crystallizer copper pipe convexity |
-
2019
- 2019-05-22 CN CN201920741439.8U patent/CN210208576U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110076303A (en) * | 2019-05-22 | 2019-08-02 | 中冶赛迪工程技术股份有限公司 | Change the method and variable convex crystallizer copper pipe of crystallizer copper pipe convexity |
| CN110076303B (en) * | 2019-05-22 | 2024-05-03 | 中冶赛迪工程技术股份有限公司 | Method for changing convexity of crystallizer copper pipe and variable convexity crystallizer copper pipe |
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