CN213350812U - Tundish safety plug for lower nozzle of slab caster - Google Patents
Tundish safety plug for lower nozzle of slab caster Download PDFInfo
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- CN213350812U CN213350812U CN202021990178.2U CN202021990178U CN213350812U CN 213350812 U CN213350812 U CN 213350812U CN 202021990178 U CN202021990178 U CN 202021990178U CN 213350812 U CN213350812 U CN 213350812U
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- tundish
- safety plug
- top plate
- round hole
- tundish safety
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Abstract
The utility model provides a tundish safety stopper on the lower mouth of a river for slab caster, the outside shape that is used for tundish safety stopper on the lower mouth of a river of slab caster is the same with lower mouth of a river shape, a tundish safety stopper on the lower mouth of a river for slab caster includes: the device comprises a top plate, a supporting clamping table connected below the top plate, and a contraction part connected below the supporting clamping table; the top surface is in contact with the water feeding port and is positioned on the top plate of the tundish safety plug for stopping the flow of the double-flow slab continuous casting machine; the middle part of the top surface is provided with a round hole which is a blind hole, the diameter of the round hole is larger than that of a corresponding tundish water inlet, and the round hole is easy to melt a cover and is arranged in the round hole; and the plugging layer capable of bouncing upwards is connected below the easily-melted cover and is positioned in the round hole. The utility model discloses can make the molten steel concentrate on the interior intraoral solidification of well package upper nozzle, avoid the molten steel to flow into the gap between the upper and lower mouth of a river, provide the condition for opening once more.
Description
Technical Field
The utility model relates to a metallurgical field, concretely relates to a tundish safety plug for on the lower mouth of a river of slab caster.
Background
When the slab continuous casting machine stops flowing, the prior art is difficult to avoid the situation that molten steel flows into a gap between an upper water gap and a lower water gap to influence the reproduction after the flowing is stopped.
In summary, the following problems exist in the prior art: when the slab continuous casting machine stops flowing, molten steel flows into a gap between an upper water gap and a lower water gap, and the reproduction after the flowing is stopped is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a middle package safety cock that is used for the lower mouth of a river of slab caster also is called the middle package safety plate that is used for on the lower mouth of a river of slab caster to solve the slab caster when stopping flowing, the gap between the upper and lower mouth of a river is flowed into to the molten steel, influences the problem of reproduction after stopping flowing.
Therefore, the utility model provides a tundish safety plug used on a lower nozzle of a slab caster, the outer shape of the tundish safety plug used on the lower nozzle of the slab caster is the same as the shape of the lower nozzle,
the tundish safety plug used on the lower nozzle of the slab caster comprises:
the device comprises a top plate, a supporting clamping table connected below the top plate, and a contraction part connected below the supporting clamping table;
the top surface is in contact with the water feeding port and is positioned on the top plate of the tundish safety plug for stopping the flow of the double-flow slab continuous casting machine;
a round hole is arranged in the middle of the top surface, the round hole is a blind hole, the diameter of the round hole is larger than that of a corresponding tundish water feeding port,
the easily-melting cover is arranged in the round hole;
the sealing layer capable of bouncing upwards is connected below the easily-melted cover and is positioned in the round hole;
the easily melt lid has two states, is respectively: a normal temperature state and a melting state,
under the normal temperature state, the easily-melted cover is fixed in the circular hole, and the upper surface of the easily-melted cover is flush with the top surface;
in the melting state, the easily-melted cover is melted by the molten steel flowing down by the continuous casting machine;
the blocking layer has two states corresponding to the easily-melted cover, and the blocking layer is pressed below the easily-melted cover at the normal temperature state; and in a melting state, the blocking layer releases the pressing and bouncing to the top surface and covers the bottom of the water feeding port.
Furthermore, the top surface of the top plate is rectangular, the side surface of the top plate is a vertical plane, an inclined plane which is matched with the lower water gap and inclines inwards and downwards is connected below the side surface of the top plate, and the supporting clamping table is a clamping table formed by the vertical plane and the inclined plane.
Further, the diameter of the round hole is 10-20 mm larger than that of the water feeding port of the tundish.
Furthermore, the depth of the round hole is 20-30 mm.
Further, the easily melt lid is 1 ~ 2mm thick, and the joint is in the round hole.
Further, the size of the top plate is as follows: the length is 198mm to 200mm, the width is 208mm to 210mm, and the thickness is 38 mm to 42 mm.
Further, the slope of the inclined surface is 45 degrees.
Furthermore, the external shape of the contraction part is a frustum shape, and the taper forms an included angle of 70-75 degrees with the central line of the frustum.
Further, a conical or cylindrical refractory block is connected below the constriction.
The utility model discloses can make the molten steel concentrate on the interior intraoral solidification of well package upper nozzle, avoid the molten steel to flow into the gap between the upper and lower mouth of a river, provide the condition for opening once more. The invention ensures that the tundish of the double-flow slab caster can safely stop casting production in a high liquid level state of more than 50 percent.
Drawings
FIG. 1 is a side cross-sectional view of the tundish safety plug of the present invention;
FIG. 2 is a schematic view of the structure of the tundish safety plug of the present invention when it reaches the tundish upper nozzle, and the fusible cover is not yet burned;
FIG. 3 is a schematic view of the structure of the tundish safety plug of the present invention after reaching the tundish upper nozzle and the easily meltable cover is burnt;
FIG. 4 is a schematic top view of the tundish safety plug of the present invention;
fig. 5 is a schematic front view of the safety plug of the tundish of the present invention.
The reference numbers illustrate:
1. a tundish safety plug; 2. a water feeding port; 10. a top plate; 20. a layer of resilient refractory material; 30. the cover is easy to melt; 40. a bevel; 50. a constriction; 45. supporting the clamping table; 60. a block of refractory material.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, the present invention will now be described.
As shown in fig. 1, 2, 3, 4 and 5, the tundish safety plug (also referred to as a safety plate) includes: a top plate 10, a support clamping table 45 connected below the top plate, and a contraction part 50 connected below the support clamping table; the supporting clamping table 45 is used for supporting the top plate 10 on the same plane of the lower nozzle or fixing the top plate 10 below the upper nozzle, and the contraction part 50 is connected below the supporting clamping table 45 and used for containing refractory materials and fixing the safety plug without shaking so as to play roles in blocking, leakage prevention and fixing;
the top surface contacted with the water feeding port is positioned on the top plate 10 of the tundish safety plug for stopping the flow of the double-flow slab continuous casting machine;
the middle part of the top surface is provided with a round hole which is a blind hole, and the diameter of the round hole is larger than that of a corresponding tundish water feeding port so as to ensure that the inner hole of the water feeding port is covered;
as shown in fig. 1 and 4, an easily-fusible cover 30, which is made of a material having a melting point of less than 500 ℃, is provided in the circular hole;
the blocking layer capable of bouncing upwards, such as an elastic refractory material layer 20, is connected below the easily-melting cover and is positioned in the circular hole, and except for the easily-melting cover 30 and the elastic refractory material layer 20, the material of the base body of the tundish safety plug (also called a safety plate) is common refractory material (such as refractory fiber or refractory asbestos or silicic acid fiber).
Further, the upper surface of the fusible cover 30 is flush with the top surface to play a role of protecting and restricting the plugging layer at normal temperature.
Further, the easily-melting cover 30 is a plastic cover, so that the easily-melting cover is convenient to manufacture, install and use, reasonable in melting process and low in cost.
The appearance of the tundish safety plug (also called a safety plate) is the same as or similar to that of a half tundish lower nozzle with a base, a round hole is arranged in the middle of the tundish safety plug, the diameter of the round hole is 10-20 mm larger than that of a corresponding tundish upper nozzle, and the depth of the round hole is 20-30 mm, so that the tundish upper nozzle can be corroded and reamed, or the safety plate can completely cover an inner hole of the upper nozzle when the centering is not good.
The base body of the tundish safety plug is made of a refractory material, the plane in contact with the water feeding port is made of a high-temperature-resistant and wear-resistant material, the round hole is divided into two layers, the first layer is a plastic cover with the thickness of 1-2 mm, and the plastic cover is positioned through 4 small holes in the round hole and covers the refractory material on the second layer; the second floor is closely knit compression and elastic refractory material (high temperature cellucotton or asbestos rope), easily melt the lid and have two states, do respectively: the easy-melting cover is fixed in the circular hole at the normal temperature, and the upper surface of the easy-melting cover is flush with the top surface; in the melting state, the easily-melted cover is melted by the molten steel flowing down by the continuous casting machine;
the blocking layer has two states corresponding to the easily-melted cover, and the blocking layer is pressed below the easily-melted cover at the normal temperature state; in a melting state, the blocking layer is released from pressing and bounces to the top surface to cover the bottom of the water feeding port;
in production, after the safety plate is in place (moved to the original position of the lower nozzle through the chute of the lower nozzle mechanism and positioned below the upper nozzle), the plastic cover is burnt by high temperature, and the elastic refractory material expands upwards to block molten steel from flowing into a gap between the upper nozzle and the lower nozzle.
Further, the top surface of the top plate 10 is rectangular, the side surface of the top plate 10 is a vertical plane, an inclined surface 40 which is matched with the drain port and inclines inwards and downwards is connected below the side surface of the top plate, and the supporting clamping table 45 is a clamping table formed by the vertical plane and the inclined surface. The inclined plane 40 is used for matching with the spatial structure of the lower nozzle, so that the top plate 10 is retracted inwards to avoid conflict with a clamping groove of the lower nozzle.
Further, the diameter of the round hole is 10-20 mm larger than that of the water feeding port of the tundish, and the inner hole of the water feeding port can be completely covered when the safety plug is not well centered.
Further, the depth of the round hole is 20-30 mm, so that erosion prevention reaming is guaranteed.
Further, easily melt the lid and be 1 ~ 2mm thick, the joint is in the round hole, thickness is too thick, melts slowly, and thickness is too thin, receives destruction before melting easily.
Further, the size of the top plate is as follows: the length is 198mm to 200mm, the width is 208mm to 210mm, and the thickness is 38 mm to 42 mm. For example, the top plate has the dimensions: the length is 199mm, wide 209mm, and thickness is 40mm to play better shutoff effect and the spatial structure of cooperation mouth of a river.
Further, the slope of the inclined plane 40 is 45 degrees, and is matched with the slope of the clamping groove of the drainage port.
Further, the external shape of the contraction part 50 is a frustum shape, which can be a square frustum shape or a cone frustum shape, and the taper forms an included angle of 70 to 75 degrees with the central line of the frustum, so as to reduce the weight and adapt to the space of the drainage port.
Further, a conical or cylindrical refractory block 60 is attached below the constriction 50 to facilitate the fitting with the nozzle. The thickness of the refractory material block 60 is 40-60 mm, and the material is silicic acid (Al) fiber, so that the functions of plugging and leakage prevention are achieved. Wherein, the side of roof, inclined plane 40, support ka tai 45 and the shrink portion 50 outside all overlap the iron sheet shell, and the protection refractory material does not with lower mouth of a river mechanism direct contact, and the shrink portion 50 is fixed the safety plug and can not rock, and refractory material piece 60 plays shutoff, leak protection effect.
Utilize the utility model discloses carry out the operation method that the high liquid level plan of well package stopped flowing under the pouring state:
(1) the superheat degree of the tundish in the previous furnace before the flow stopping and the flow stopping furnace times is above 30 ℃, and the phenomenon that the tundish temperature is too low, the bowl part of the water feeding port is cooled, and the stopper rod cannot be closed is avoided.
(2) And the flow stopping operation is performed in the middle and later period of ladle pouring, the pulling speed is gradually reduced by 0.05m/min for the flow times ready for flow stopping when the quantity of the ladle molten steel is 30%, and the pulling speed is reduced to 0.2-0.3 m/min when the ladle molten steel is completely poured, and if the stopper cannot be closed in the speed reduction process and the steel flow cannot be controlled, the flow stopping operation is abandoned.
(3) The planned stopping heat is that after the pouring of the large ladle is finished, the new large ladle is not poured before the new large ladle is rotated to the pouring position; and (3) stopping the production flow for maintaining the pulling speed of 0.1-0.3 m/min, maintaining the normal pulling speed of the other flow, and closing the stopper rod and stopping the low-pulling-speed flow production by using the safety stopper of the tundish when the liquid level of the molten steel of the tundish is reduced to 50% of the normal production height. Therefore, the safe flow stopping of the low-pulling-speed flow under the condition of small ferrostatic pressure can be ensured, and the pollution of the normal production flow caused by the inclusion of the tundish slag to the molten steel can also be avoided.
The invention can lead the molten steel to be concentrated in the upper water gap of the tundish and be solidified, thereby avoiding the molten steel from flowing into the gap between the upper water gap and the lower water gap and providing conditions for secondary flow opening. The invention can ensure that the tundish of the double-flow slab caster can safely stop casting production in a high liquid level state of more than 50 percent.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. For the utility model discloses a each component can make up each other under the condition of conflict not, and any technical personnel in the field do not deviate from the utility model discloses an equal change and the modification made under the prerequisite of the design and principle all should belong to the scope of protection of the utility model.
Claims (9)
1. A tundish safety plug used on a drain nozzle of a slab continuous casting machine is characterized in that the outer shape of the tundish safety plug used on the drain nozzle of the slab continuous casting machine is the same as that of the drain nozzle,
the tundish safety plug used on the lower nozzle of the slab caster comprises:
the device comprises a top plate, a supporting clamping table connected below the top plate, and a contraction part connected below the supporting clamping table;
the top surface is in contact with the water feeding port and is positioned on the top plate of the tundish safety plug for stopping the flow of the double-flow slab continuous casting machine;
a round hole is arranged in the middle of the top surface, the round hole is a blind hole, the diameter of the round hole is larger than that of a corresponding tundish water feeding port,
the easily-melting cover is positioned in the top plate and arranged in the round hole;
the sealing layer capable of bouncing upwards is connected below the easily-melted cover and is positioned in the round hole;
the easily melt lid has two states, is respectively: a normal temperature state and a melting state,
under the normal temperature state, the easily-melted cover is fixed in the circular hole, and the upper surface of the easily-melted cover is flush with the top surface;
in the melting state, the easily-melted cover is melted by the molten steel flowing down by the continuous casting machine;
the blocking layer has two states corresponding to the easily-melted cover, and the blocking layer is pressed below the easily-melted cover at the normal temperature state; and in a melting state, the blocking layer releases the pressing and bouncing to the top surface and covers the bottom of the water feeding port.
2. The tundish safety plug of claim 1, wherein the top surface of the top plate is rectangular, the side surface of the top plate is a vertical plane, an inward and downward inclined surface matched with the drain nozzle is connected below the side surface of the top plate, and the support clamping table is a clamping table formed by the vertical plane and the inclined surface.
3. The tundish safety plug used on a drain nozzle of a slab caster according to claim 1, wherein the diameter of the circular hole is 10-20 mm larger than that of the drain nozzle of the tundish.
4. The tundish safety plug used on a down nozzle of a slab caster according to claim 1, wherein the depth of the circular hole is 20-30 mm.
5. The tundish safety plug used on a drain nozzle of a slab caster as claimed in claim 1, wherein the easily-melted cover is 1-2 mm thick and is clamped in the circular hole.
6. The tundish safety plug for a down nozzle of a slab caster of claim 1, wherein the roof has a size of: the length is 198mm to 200mm, the width is 208mm to 210mm, and the thickness is 38 mm to 42 mm.
7. The tundish safety plug for a downcomer of a slab caster according to claim 2, wherein the slope of the ramp is 45 degrees.
8. The tundish safety plug of claim 1, wherein the constriction is shaped as a frustum of a cone having an angle of 70 to 75 degrees with the centerline of the frustum.
9. The tundish safety plug for a downcomer of a slab caster according to claim 1, wherein a conical or cylindrical block of refractory material is also attached below the constriction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021990178.2U CN213350812U (en) | 2020-09-11 | 2020-09-11 | Tundish safety plug for lower nozzle of slab caster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021990178.2U CN213350812U (en) | 2020-09-11 | 2020-09-11 | Tundish safety plug for lower nozzle of slab caster |
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| Publication Number | Publication Date |
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| CN213350812U true CN213350812U (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021990178.2U Active CN213350812U (en) | 2020-09-11 | 2020-09-11 | Tundish safety plug for lower nozzle of slab caster |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7461442B1 (en) | 2022-11-14 | 2024-04-03 | 黒崎播磨株式会社 | Continuous casting nozzle |
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2020
- 2020-09-11 CN CN202021990178.2U patent/CN213350812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7461442B1 (en) | 2022-11-14 | 2024-04-03 | 黒崎播磨株式会社 | Continuous casting nozzle |
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