WO2015119351A1 - 슬라이트 게이트 및 슬라이드 게이트용 밸브판 - Google Patents
슬라이트 게이트 및 슬라이드 게이트용 밸브판 Download PDFInfo
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- WO2015119351A1 WO2015119351A1 PCT/KR2014/008778 KR2014008778W WO2015119351A1 WO 2015119351 A1 WO2015119351 A1 WO 2015119351A1 KR 2014008778 W KR2014008778 W KR 2014008778W WO 2015119351 A1 WO2015119351 A1 WO 2015119351A1
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- WIPO (PCT)
- Prior art keywords
- valve plate
- short side
- long side
- length
- slide gate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/28—Plates therefor
Definitions
- the present invention relates to a slide gate positioned between the ladle and the tundish to adjust the flow rate of the molten steel, and more particularly to a valve plate for the slide gate that can minimize the occurrence of stress and cracks.
- the molten steel refined from the ladle is transferred to the tundish, and a slide gate is provided between the ladle and the tundish to adjust the flow rate of the molten steel.
- the slide gate consists of an upper valve plate and a lower valve plate on which respective orifices are formed.
- the slide gate is opened when two orifices are in the same position, and is closed when the lower valve plate slides and the orifice of the upper valve plate is blocked by the lower valve plate. And the flow of molten steel can be adjusted by controlling the opening degree of an upper valve board orifice according to the movement degree of a lower valve board.
- the temperature around the orifice reaches 1600 ° C., while the temperature of the outer part of the valve plate is about 400 ° C. Therefore, a temperature gradient occurs from the orifice toward the valve plate edge, and the thermal expansion difference causes cracks inside the valve plate.
- the present invention is to provide a valve plate for a slide gate and a slide gate that can minimize the stress and crack generation occurring in the valve plate by optimizing the shape of the valve plate.
- the valve plate for a slide gate is the first long side and the second long side facing each other and parallel to each other, the first short side and the second short side inclined contact with one end of each of the first long side and the second long side, And a third short side connecting the first short side and the second short side and a fourth short side and a fifth short side inclined contact with the other end of each of the first long side and the second long side.
- the valve plate for the slide gate is symmetrical with respect to the center line parallel to the first long side and the second long side while maintaining the same distance as the first long side and the second long side, and an orifice is formed on the center line.
- the first long side and the second long side may have the same length, and the length of the first long side and the second long side may be greater than the length of each of the first short side to the fifth short side.
- the first short side and the second short side may have the same length, and the length of the third short side may be smaller than the length of each of the first short side and the second short side.
- the corners where the fourth short side and the fifth short side contact each other may be rounded.
- the orifice may be located between the first and second long sides, each of the first and second long sides having a length of ⁇ 1 and a ⁇ 2 by an imaginary vertical line perpendicular to the center line and meeting the shape center of the orifice. It may be bisected into a second part having a length of.
- the first long side and the second long side may be formed to satisfy the following conditions.
- An imaginary right triangle may be set on the valve plate, each of which is a hypotenuse of the fourth short side and the fifth short side, and the right triangle may have a base length of k1 length and a height of k2 length.
- the fourth short side and the fifth short side may be formed to satisfy the following conditions.
- the slide gate according to an embodiment of the present invention includes a valve plate of the above-described configuration as the upper valve plate and the lower valve plate, the lower valve plate is moved by the stroke length of S to open and close the orifice of the upper valve plate.
- the overall length D1 of the valve plate may be in the range of 2 to 3 times the stroke length S, and the overall width D2 of the valve plate may be in the range of 1 to 1.5 times the stroke length S. Can be.
- the valve plate for a slide gate of this embodiment is configured in a hexagonal shape, and the maximum stress generated in the valve plate is optimized by optimizing the inclination and length of the first short side, second short side, fourth short side, and fifth short side to which the clamping force is applied. Can be reduced. As a result, the crack generation of a valve board can be suppressed and the service life of a valve board can be improved.
- FIG. 1 is a perspective view of a valve plate for a slide gate according to an embodiment of the present invention.
- FIG. 2 and 3 are cutaway perspective views of the slide gate including the valve plate shown in FIG.
- Figure 4 is a graph showing the results of numerical analysis of the maximum stress magnitude according to the change ⁇ 1 / ⁇ 2.
- Figure 5 is a graph showing the numerical results of the maximum stress magnitude according to the change of k1 / k2.
- FIG. 1 is a perspective view of a valve plate for a slide gate according to an embodiment of the present invention.
- valve plate 100 of the present embodiment forms a circular orifice 19 for discharging molten steel as a plate of a heptagon shape having a constant thickness.
- valve plate 100 faces the first long side 11 and the second long side 12 facing each other and is inclined to abut one end of each of the first long side 11 and the second long side 12.
- the first long side 11 and the second long side 12 are formed to have the same length, and the lengths of the first long side 11 and the second long side 12 are each of the first short side to the fifth short side 21 to 25. Greater than the length
- the first short side 21 and the second short side 22 are inclined to contact the left end of each of the first long side 11 and the second long side 12, and the third short side 23 is the first short side. (21) and the second short side 22 are connected.
- the first short side 21 and the second short side 22 may have the same length, and the length of the third short side 23 may be smaller than the length of each of the first short side 21 and the second short side 22.
- the fourth short side 24 and the fifth short side 25 are inclined to contact the right ends of the first long side 11 and the second long side 12, respectively, and the fourth short side 24 and the fifth short side. 25 is formed in the same length.
- the corners where the fourth short side 24 and the fifth short side 25 contact each other may be rounded to a predetermined curvature without being sharply formed.
- the valve plate 100 has a rhombus shape in contact with one side of the center rectangular part and a triangular shape in contact with the other side of the center rectangular part.
- the corners in which the first long side 11 and the second long side 12 and the first short side to fifth short sides 21 to 25 are in contact with each other may be rounded to suppress stress concentration at the edge.
- An imaginary center line CC parallel to the first long side 11 and the second long side 12 may be set on the valve plate 100 while maintaining the same distance as the first long side 11 and the second long side 12.
- the valve plate 100 is symmetrical with respect to this center line C-C (up and down symmetry with reference to FIG. 1), and the orifice 19 is located on this center line C-C.
- the shape center of the orifice 19 is located on this center line C-C.
- the orifice 19 does not deviate between the first long side 11 and the second long side 12.
- the first long side 11 and the second long side 12 are divided into the first parts 11a and 12a and the second parts 11b and 12b based on the vertical line DD, and the first parts 11a and 12a.
- second portions 11b and 12b have a length of ⁇ 1 and ⁇ 2, respectively.
- the first portions 11a and 12a are in contact with the first short side 21 and the second short side 22, and the second portions 11b and 12b are in contact with the fourth short side 24 and the fifth short side 25.
- the length ⁇ 1 of the first portions 11a and 12a is greater than the length ⁇ 2 of the second portions 11b and 12b. That is, the orifice 19 is located closer to the fourth short side 24 and the fifth short side 25 than the first short side 21 and the second short side 22.
- the first short side 21 has an inclination of an acute angle with respect to the first long side 11, and the second short side 22 has an inclination of an acute angle with respect to the second long side 12.
- inclinations of the first short side 21 and the second short side 22 are denoted by ⁇ .
- a virtual right triangle may be set on the valve plate 100, each of the fourth short side 24 and the fifth short side 25 as a hypotenuse.
- the base side k1 of the right triangle is parallel to the center line C-C, and a part of the base side overlaps the center line C-C.
- the height k2 of the right triangle is parallel to the vertical line D-D.
- the slopes of the fourth short side 24 and the fifth short side 25 are determined by k1 and k2 values.
- the first short side 21, the second short side 22, the fourth short side 24, and the fifth short side 25 of the valve plate 100 are in contact with the stopper of the clamping device, not shown, to apply the clamping force from the clamping device. It is a licensed part. And the surface pressure according to the weight of the molten steel is applied to the entire surface of the valve plate (100).
- FIG. 2 and 3 are cutaway perspective views of the slide gate including the valve plate shown in FIG. 1, showing FIG. 2 in an open state, and FIG. 3 showing a closed state.
- two valve plates 110 and 120 are stacked to form a slide gate 200. That is, the slide gate 200 is composed of an upper valve plate 110 and a lower valve plate 120, and the two valve plates 110 and 120 have the same configuration as the valve plate 100 shown in FIG. 1.
- the upper valve plate 110 is disposed to be opposite to the left and right with respect to the lower valve plate 120. That is, when the fourth short side 24 and the fifth short side 25 of the lower valve plate 120 are located to the right side, the fourth short side 24 and the fifth short side 25 of the upper valve plate 110 are leftward. Is located towards.
- the orifice 19 of the upper valve plate 110 is connected to the upper nozzle (not shown) to keep the molten steel flowing at all times.
- the slide gate 200 is in an open state, and the lower valve plate 120 slides so that the upper valve plate ( Clogging the orifice 19 of 110 causes the slide gate 200 to switch to a closed state.
- the valve plate 100 of the present embodiment may be configured as a hexagonal shape, thereby minimizing the generation of stress as compared with a valve plate having another conventional shape.
- the valve plate without the first long side 11 and the second long side 12 may have a pentagonal shape, and the valve plate 100 of the present embodiment may lower the maximum stress value compared to the pentagonal valve plate.
- Table 1 shows the numerical results of the maximum stress magnitude according to the ratio of ⁇ 1 and ⁇ 2 and the change in the slope ⁇ of the first short side 21 and the second short side 22 under the same clamp pressure.
- the maximum stress means the maximum tensile stress acting on the valve plate 100, and the smaller the magnitude, the less the occurrence of cracking.
- Sample 1 is a pentagonal valve plate
- Samples 2 to 9 are seven-valve valve plates. It can be seen that the maximum stress of Samples 2 to 9 was reduced compared to Sample 1 under conditions in which the same clamping pressure was applied to Samples 1 to 9. In particular, as the lengths of the first long side 11 and the second long side 12 are greater than the length of the entire valve plate 100, it can be seen that the maximum stress is greatly reduced.
- the length ratio ⁇ 1: ⁇ 2 and the fourth short side 24 of the first portion 11a and the second portion 11b for dividing the first long side 11 are hypotenuse.
- the base and height ratio k1: k2 of the right triangle are related to the stress of the valve plate 100.
- Figure 4 is a graph showing the numerical results of the maximum stress magnitude according to the change ⁇ 1 / ⁇ 2 for Samples 10 to 13.
- Table 2 below shows the shape characteristics of Samples 10 to 13.
- the maximum stress generated in the valve plate 100 decreases as the value of ⁇ 1 / ⁇ 2 increases for all of the samples 10 to 13.
- the valve plate 100 can obtain the effect of reducing the maximum stress when the value of ⁇ 1 / ⁇ 2 is 2 or more, and especially when the value of ⁇ 1 / ⁇ 2 is 2 or more in Samples 11 to 13, the maximum stress does not show a large change.
- the lower limit of the value of ⁇ 1 / ⁇ 2 in the valve plate 100 is 2, and the value of ⁇ 1 / ⁇ 2 can be increased within a range that can be implemented. It may be set to satisfy.
- the valve plate 100 may obtain an effect of reducing the maximum stress when the k1 / k2 value is 2.75 or less, and k1 / k2 of 1.5 or less may not be manufactured. Therefore k1 / k2 may be set to satisfy the range of 1.5 to 2.75.
- the full length and the full width, the length ⁇ 1 of the first portions 11a and 21a and the length of the third short side 23 are lower valve plates when the slide gate 200 is operated. It is related to the stroke length, which is the travel distance of 120.
- the stroke length which is the travel distance of 120.
- D1 the entire length of the valve plate 100
- D2 the overall width
- D2 the stroke length of the lower valve plate 120 in Figure 3
- the total length D1 of the valve plate 100 may be set to satisfy the range of 2 times to 3 times the stroke length S.
- the total length D1 of the valve plate 100 is less than twice the stroke length S, the length of the valve plate 100 is not sufficient in the operation direction of the valve plate 100, so the lower valve plate in the closed state. 120 may not block the orifice 19 of the upper valve plate 110, so that molten steel may leak out.
- the manufacturing cost of the valve plate 100 may increase due to excessive material use.
- the overall width D2 of the valve plate 100 may be set to satisfy the range of 1 to 1.5 times the stroke length S.
- the overall width D2 of the valve plate 100 is less than one times the stroke length S, the first and second long sides 11 and 12 and the orifice 19 are excessively positioned so that they are perpendicular to the orifice 19. There is a possibility of cracking in the direction.
- the overall width D2 of the valve plate 100 exceeds 1.5 times the stroke length S, there is no change in the performance of the valve plate 100, but the materials used may be wasted.
- the length ⁇ 1 of the first portions 11a and 12a may be set to satisfy the range of 0.2 times to 0.5 times the stroke length S.
- FIG. And the length of the third short side 23 may be set to satisfy the range of 0.5 times to 1 times the stroke length (S).
- the valve plate 100 of the present embodiment has a hexagonal shape, and includes the first short side 21, the second short side 22, the fourth short side 24, and the fifth short side 25 to which the clamping force is applied.
- the maximum stress generated in the valve plate 100 can be reduced.
- crack generation of the valve plate 100 can be suppressed to improve the service life of the valve plate 100.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
| 시료 No. | 1 | 2 | 3 | 4 | 5 |
| δ1:δ2 | 0:0 | 0:1 | 1:1 | 1:3.1 | 1.5:1 |
| θ(°) | 8 | 11 | 13 | 15 | 16 |
| 최대 응력(MPa) | 438.8 | 421.5 | 415 | 398.3 | 382.5 |
| 시료 No. | 6 | 7 | 8 | 9 | |
| δ1:δ2 | 2:1 | 2.5:1 | 3:1 | 3.3:1 | |
| θ(°) | 20 | 25 | 30 | 35 | |
| 최대 응력(MPa) | 360.8 | 358.6 | 358.6 | 357.3 |
| 제1 단변의 기울기(°) | k1:k2 | 오리피스 지름(mm) | 제3 단변의 길이(mm) | |
| 시료 10 | 22.04 | 1.55:1 | 35 | 90 |
| 시료 11 | 12.93 | 1.54:1 | 60 | 125 |
| 시료 12 | 19.54 | 1.92:1 | 55 | 100 |
| 시료 13 | 19.29 | 2.29:1 | 85 | 135 |
| δ1:δ2 | 제1 단변의 기울기(°) | 오리피스 지름(mm) | 제3 단변의 길이(mm) | |
| 시료 14 | 3:1 | 22.04 | 35 | 90 |
| 시료 15 | 1.17:1 | 12.93 | 60 | 125 |
| 시료 16 | 2.08:1 | 19.54 | 55 | 100 |
| 시료 17 | 2.11:1 | 19.29 | 85 | 135 |
Claims (11)
- 서로 마주하며 나란한 제1 장변 및 제2 장변과, 제1 장변 및 제2 장변 각각의 일측 단부와 경사지게 접하는 제1 단변 및 제2 단변과, 제1 단변과 제2 단변을 연결하는 제3 단변과, 제1 장변 및 제2 장변 각각의 타측 단부와 경사지게 접하는 제4 단변 및 제5 단변을 가지는 칠각 형상으로 이루어지며,상기 제1 장변 및 상기 제2 장변과 같은 거리를 유지하면서 상기 제1 장변 및 상기 제2 장변과 나란한 중앙선을 기준으로 대칭을 이루고, 중앙선 상에 오리피스가 형성되는 슬라이드 게이트용 밸브판.
- 제1항에 있어서,상기 제1 장변과 상기 제2 장변은 같은 길이로 형성되며,상기 제1 장변과 상기 제2 장변의 길이는 상기 제1 단변 내지 상기 제5 단변 각각의 길이보다 큰 슬라이드 게이트용 밸브판.
- 제2항에 있어서,상기 제1 단변과 상기 제2 단변은 같은 길이로 형성되고,상기 제3 단변의 길이는 상기 제1 단변 및 상기 제2 단변 각각의 길이보다 작은 슬라이드 게이트용 밸브판.
- 제3항에 있어서,상기 제4 단변과 상기 제5 단변이 접하는 모서리는 라운드 처리되는 슬라이드 게이트용 밸브판.
- 제1항에 있어서,상기 오리피스는 상기 제1 장변과 상기 제2 장변 사이에 위치하고,상기 제1 장변과 상기 제2 장변 각각은 상기 중앙선과 직교하면서 상기 오리피스의 형상 중심과 만나는 가상의 수직선에 의해 δ1의 길이를 가지는 제1 부분과 δ2의 길이를 가지는 제2 부분으로 양분되는 슬라이드 게이트용 밸브판.
- 제5항에 있어서,상기 제1 장변과 상기 제2 장변은 하기 조건을 만족하도록 형성되는 슬라이드 게이트용 밸브판.2 ≤ δ1/δ2 ≤ 3.5
- 제1항에 있어서,상기 밸브판 상에 상기 제4 단변과 상기 제5 단변 각각을 빗변으로 하는 가상의 직각 삼각형이 설정되고,상기 직각 삼각형은 k1 길이의 밑변과 k2 길이의 높이를 가지는 슬라이드 게이트용 밸브판.
- 제7항에 있어서,상기 제4 단변과 상기 제5 단변은 하기 조건을 만족하도록 형성되는 슬라이드 게이트용 밸브판.1.5 ≤ k1/k2 ≤ 2.75
- 제1항 내지 제8항 중 어느 한 항의 밸브판을 상부 밸브판과 하부 밸브판으로 포함하는 슬라이트 게이트에 있어서,상기 하부 밸브판이 S의 스트로크 길이만큼 움직여 상기 상부 밸브판의 오리피스를 열고 닫는 슬라이드 게이트.
- 제9항에 있어서,상기 밸브판의 전체 길이(D1)는 상기 스트로크 길이(S)의 2배 내지 3배 범위에 속하는 슬라이드 게이트.
- 제10항에 있어서,상기 밸브판의 전체 폭(D2)은 상기 스트로크 길이(S)의 1배 내지 1.5배의 범위에 속하는 슬라이드 게이트.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201480074861.2A CN105980085A (zh) | 2014-02-06 | 2014-09-22 | 滑动水口及用于滑动水口的阀板 |
| BR112016018017-8A BR112016018017B1 (pt) | 2014-02-06 | 2014-09-22 | Porta deslizante e placa da válvula para porta deslizante |
| EP14881865.1A EP3103564B1 (en) | 2014-02-06 | 2014-09-22 | Slide gate and valve plate for slide gate |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2014-0013850 | 2014-02-06 | ||
| KR1020140013850A KR101520038B1 (ko) | 2014-02-06 | 2014-02-06 | 슬라이드 게이트 및 슬라이드 게이트용 밸브판 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015119351A1 true WO2015119351A1 (ko) | 2015-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/KR2014/008778 Ceased WO2015119351A1 (ko) | 2014-02-06 | 2014-09-22 | 슬라이트 게이트 및 슬라이드 게이트용 밸브판 |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3103564B1 (ko) |
| KR (1) | KR101520038B1 (ko) |
| CN (1) | CN105980085A (ko) |
| BR (1) | BR112016018017B1 (ko) |
| WO (1) | WO2015119351A1 (ko) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102066791B1 (ko) * | 2018-05-18 | 2020-01-15 | 서광공업 주식회사 | 게이트 밸브 |
| KR102622383B1 (ko) * | 2022-04-20 | 2024-01-10 | 조선내화 주식회사 | 캠을 이용한 슬라이드 게이트용 밸브판의 자동 클램핑 장치 |
| KR102608857B1 (ko) | 2022-04-20 | 2023-12-04 | 조선내화 주식회사 | 개선된 구조의 슬라이드 게이트용 밸브판 및 이를 이용한 슬라이드 게이트 |
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| CN201333522Y (zh) * | 2008-12-16 | 2009-10-28 | 阳泉市下千耐火材料有限公司 | 控制钢水流速的滑板砖 |
| JP4801222B1 (ja) * | 2010-12-03 | 2011-10-26 | 黒崎播磨株式会社 | スライディングノズルプレート |
| CN102649645A (zh) * | 2011-02-23 | 2012-08-29 | 武汉武钢维苏威高级陶瓷有限公司 | 耐火材料 |
| CN202185582U (zh) * | 2011-07-18 | 2012-04-11 | 卫辉熔金高温材料有限责任公司 | 带定位槽的滑板砖 |
-
2014
- 2014-02-06 KR KR1020140013850A patent/KR101520038B1/ko active Active
- 2014-09-22 WO PCT/KR2014/008778 patent/WO2015119351A1/ko not_active Ceased
- 2014-09-22 EP EP14881865.1A patent/EP3103564B1/en active Active
- 2014-09-22 BR BR112016018017-8A patent/BR112016018017B1/pt active IP Right Grant
- 2014-09-22 CN CN201480074861.2A patent/CN105980085A/zh active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137922A (ja) * | 1996-10-31 | 1998-05-26 | Kawasaki Refract Co Ltd | スライディングノズルプレート用金枠 |
| US7290685B2 (en) * | 2003-12-16 | 2007-11-06 | Tokyo Yogyo Kabushiki Kaisha | Nozzle plate for a sliding nozzle apparatus |
| KR20100046726A (ko) * | 2008-10-28 | 2010-05-07 | 조선내화 주식회사 | 용강주조용 슬라이딩 플레이트 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3103564A4 (en) | 2017-08-30 |
| EP3103564B1 (en) | 2019-11-06 |
| BR112016018017B1 (pt) | 2020-03-17 |
| CN105980085A (zh) | 2016-09-28 |
| EP3103564A1 (en) | 2016-12-14 |
| KR101520038B1 (ko) | 2015-05-13 |
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