CN204220985U - Cast protective device under a kind of large bag between the mouth of a river and long nozzle - Google Patents
Cast protective device under a kind of large bag between the mouth of a river and long nozzle Download PDFInfo
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- CN204220985U CN204220985U CN201420681552.9U CN201420681552U CN204220985U CN 204220985 U CN204220985 U CN 204220985U CN 201420681552 U CN201420681552 U CN 201420681552U CN 204220985 U CN204220985 U CN 204220985U
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Abstract
The utility model provides the cast protective device under a kind of large bag between the mouth of a river and long nozzle, comprises the cylinder covered on described large bag long nozzle and the argon blowing pipeline be arranged at the bottom of described cylinder cylinder; Be provided with circular hole at the bottom of described cylinder cylinder, under making described large bag, the mouth of a river is connected with described long nozzle through at the bottom of described cylinder cylinder; Be provided with the first packing ring between at the bottom of described cylinder cylinder and at the bottom of described large handbag, at the bottom of described cylinder cylinder and between described large bag long nozzle, be provided with the second packing ring.Cast protective device under the large bag that the utility model provides between the mouth of a river and long nozzle; the lower centering between the mouth of a river and long nozzle of large bag can be ensured; reduce long nozzle rocking in casting process, and air can be avoided to enter from the lower mouth of a river and long nozzle gap make molten steel secondary oxidation.
Description
Technical field
The utility model relates to steel-smelting device technical field, the cast protective device particularly under a kind of large bag between the mouth of a river and long nozzle.
Background technology
Along with the development of economic society, the purity requirements of user to product is more and more higher, improves the problem that cleanliness is metallargist's primary study always.The cleanliness factor of strand mainly controls from two aspects, removes the field trash in steel on the one hand as far as possible, reduces entering of foreign impurity on the other hand, especially will prevent molten steel secondary oxidation.Due to the quick raising of refining level, the ability removing the field trash in steel is greatly improved, and along with going deep into further of studying cleanliness, find to reduce entering of foreign impurity especially to prevent the cleanliness of the secondary oxidation of molten steel on strand from affecting increasing.In casting process, air enters molten steel, and the molding casting measure extensively taked in current casting process mainly contains: 1) adopt long nozzle to pour into a mould between ladle and tundish; 2) submersed nozzle molding casting is adopted between tundish and crystallizer; 3) between collector nozzle of ladle and long nozzle, argon gas-sealed is passed into; 4) argon gas-sealed is passed between tundish upper nozzle and tundish immersed nozzle; 5) the inner molten steel surface of tundish adds coverture etc.Water owing to opening in actual casting process, water eventually, change ladle, change the mouth of a river, crystallizer tune is wide, become the impact of the transient casting factors such as pulling rate, molten steel is easily caused to contact with air, make, in casting process, molten steel secondary oxidation phenomenon often occurs, thus have a strong impact on Cleanliness of Molten Steel and slab quality.
The phenomenon of molten steel generation secondary oxidation is caused in order to prevent molten steel from contacting with air, usually between collector nozzle of ladle and long nozzle, argon gas-sealed design is carried out, its principle is have steel cage along cover and undertaken by the gap Argon mode between the downward mouth of a river of steel cage and long nozzle on large bag long nozzle, although there is the existence of argon blowing protection device, but owing to being subject to allowance for finish, the impact of the factors such as casting process thermal expansion and MOLTEN STEEL FLOW, large bag long nozzle and junction, the lower mouth of a river often occur slight rocking cause seal between the lower mouth of a river and long nozzle stable not, thus cause molten steel to suck air, make molten steel secondary oxidation.Therefore need to improve the cast protective device between the lower mouth of a river and long nozzle, to prevent large bag long nozzle from rocking in casting process, thus reduce the secondary oxidation of molten steel in casting process.
Utility model content
The utility model object is to provide the cast protective device under a kind of large bag between the mouth of a river and long nozzle; on the basis of original blowing argon; under large bag, the periphery of the mouth of a river and long nozzle arranges a cast protective device again; ensure the lower centering between the mouth of a river and long nozzle of large bag; reduce long nozzle rocking in casting process; avoid air to enter from the lower mouth of a river and long nozzle gap, thus reduce the secondary oxidation of molten steel in casting process, to reach full guard casting.
For solving the problems of the technologies described above, the utility model provides the cast protective device under a kind of large bag between the mouth of a river and long nozzle, comprises the cylinder covered on described large bag long nozzle and the argon blowing pipeline be arranged at the bottom of described cylinder cylinder; Be provided with circular hole at the bottom of described cylinder cylinder, under making described large bag, the mouth of a river is connected with described long nozzle through at the bottom of described cylinder cylinder; The first packing ring is provided with, inner surface at the bottom of described cylinder cylinder and be provided with the second packing ring between described large bag long nozzle between at the bottom of outer surface at the bottom of described cylinder cylinder and described large handbag.
Further, described argon blowing pipeline comprises the annular pipe be arranged at the bottom of described cylinder cylinder, and being used for the straight tube on external argon delivery lines road with described annular circular pipe communicated, described annular pipe is provided with the aperture of discharging for argon gas on the direction of inner surface at the bottom of described cylinder cylinder.
Further, the number of described aperture is 10-30, is evenly distributed on described annular pipe, and the aperture of described aperture is 1/4-1/2 times of described annular pipe caliber.
Further, the circle diameter of described annular pipe is 1.05-1.1 times of mouth of a river external diameter under described large bag.
Further, outer surface at the bottom of described cylinder cylinder is provided with that the degree of depth is 2-5mm, width be 40-60mm for placing the first toroidal cavity of described first packing ring, the inner surface at the bottom of described cylinder cylinder is provided with that the degree of depth is 2-5mm, width is that 20-40mm is for placing the second toroidal cavity of described second packing ring.
Further, the internal diameter of described cylinder is along the 1-1.05 of external diameter times on described large bag long nozzle, and the aperture of circular hole at the bottom of described cylinder cylinder is 1-1.05 times of mouth of a river external diameter under described large bag.
Further, the wall thickness of described cylinder is 10-30mm.
Cast protective device under a kind of large bag that the utility model provides between the mouth of a river and long nozzle; structure is simple; convenient and practical; its cylinder tipped upside down on large bag long nozzle can play the effect of fixing relative position between long nozzle and the lower mouth of a river; effectively can prevent the large bag long nozzle shakiness caused owing to being subject to the factor impacts such as allowance for finish, casting process thermal expansion and MOLTEN STEEL FLOW; thus the centering be conducive between long nozzle and the lower mouth of a river, reduce rocking of casting process long nozzle.And the utility model on the basis of original argon blowing protection device at the bottom of cylinder cylinder in a set of argon blowing pipeline is set; constantly argon gas is blown in the bag end, the lower mouth of a river, long nozzle, the relative confined space that formed between cylinder and packing ring; form double shielding atmosphere; remain in casting cycle and in confined space, there is pressure-fired argon gas atmosphere; air is avoided to enter from the lower mouth of a river and long nozzle gap; thus effectively reduce the secondary oxidation of molten steel; improve the cleanliness factor of molten steel, finally improve the quality of strand.
Accompanying drawing explanation
The structural representation of the cast protective device under the large bag that Fig. 1 provides for the utility model embodiment between the mouth of a river and long nozzle.
The sectional view of the cast protective device under the large bag that Fig. 2 provides for the utility model embodiment between the mouth of a river and long nozzle.
Detailed description of the invention
See Fig. 1, the cast protective device under a kind of large bag that the utility model embodiment provides between the mouth of a river and long nozzle, comprises the cylinder 3 covered on large bag long nozzle 4 and the argon blowing pipeline 5 be arranged at the bottom of cylinder 3.
See Fig. 2, at the bottom of the cylinder of cylinder 3, be provided with circular hole 8, can be connected with long nozzle 4 through at the bottom of the cylinder of cylinder 3 to make the lower mouth of a river 1 of large bag.The first packing ring 2 is provided with between 6 at the bottom of outer surface at the bottom of cylinder 3 and large handbag, be provided with the second packing ring 7 at the bottom of cylinder 3 and between large bag long nozzle 4, thus make the first packing ring 2 and the second packing ring 7 with the bag end 6, the lower mouth of a river 1, between long nozzle 4 and cylinder 3, form relative confined space.Outer surface at the bottom of cylinder 3 is provided with that the degree of depth is 2-5mm, width is 40-60mm first toroidal cavity 11, for placing the first packing ring 2, moves horizontally to prevent the first packing ring 2; Equally, the inner surface at the bottom of cylinder 3 is also provided with that the degree of depth is 2-5mm, width is 20-40mm second toroidal cavity 12, for placing the second packing ring 7, moves horizontally to prevent the second packing ring 7.
Argon blowing pipeline 5 comprises the annular pipe 10 be arranged at the bottom of cylinder 3 and the straight tube 9 be communicated with annular pipe 10 for external argon delivery lines road, and the circle diameter of annular pipe 10 is 1.05-1.1 times of the large bag lower mouth of a river 1 external diameter.Annular pipe 10 is provided with the aperture 13 of discharging for argon gas on the direction of inner surface at the bottom of cylinder 3, and the number of aperture 13 is 10-30, is evenly distributed on annular pipe 10, and the aperture of aperture 13 be the 1/4-1/2 of annular pipe 10 caliber doubly.When argon gas enters in annular pipe 10 by straight tube 9; then the first packing ring 2 and the second packing ring 7 and the bag end 6, the lower mouth of a river 1, the relative confined space that formed between long nozzle 4 and cylinder 3 is evenly entered from the aperture 13 annular pipe 10; can keep there is pressure-fired argon gas atmosphere in this confined space in casting cycle; air is avoided to enter from the lower mouth of a river and long nozzle gap; thus effectively reduce the secondary oxidation of molten steel, reach the object of full guard casting.
And, in order to can make cylinder 3 easily and firmly cover on large bag long nozzle 4, the internal diameter of cylinder 3 is along the 1-1.05 of external diameter times on large bag long nozzle 4, be connected with long nozzle 4 to make the mouth of a river 1 under large bag can pass through at the bottom of cylinder 3 in casting ladle is produced, and in order to ensure the centering between the lower mouth of a river 1 and long nozzle 4, reduce long nozzle 4 rocking in casting process, the aperture of the circular hole 8 at the bottom of cylinder 3 is 1-1.05 times of the large bag lower mouth of a river 1 external diameter.In the centering process and casting process of the lower mouth of a river 1 and long nozzle 4, in order to strengthen the wear-resisting of cylinder 3 and anti-grazing ability, cylinder 3 adopts steel material to be made, and the wall thickness of cylinder 3 is 10-30mm.
In actual production, the cylinder 3 that first processing and fabricating thickness is 25mm, inside diameter is 265mm, and at the bottom of the cylinder of cylinder 3 on dig the circular hole 8 that diameter is 175mm, then outer, inner surface at the bottom of cylinder 3 dig first ring connected in star 11 and the second toroidal cavity 12, respectively to prevent at placement first packing ring 2 and latter two packing ring generation transverse shifting of the second packing ring 7.Be inlaid with argon blowing pipeline 5 in cylinder 3 inside, the annular pipe 10 that straight tube 9 and circle diameter that argon blowing pipeline 5 is 5mm by caliber are 180mm is connected and forms, and annular pipe 10 is evenly provided with the aperture 13 that 20 diameters are 2mm.Before opening and watering, first the first packing ring 2 and the second packing ring 7 to be separately fixed at the bottom of the cylinder of cylinder 3 in the first toroidal cavity 11 on outer, inner surface and the second toroidal cavity 12, then cylinder 3 is enclosed within edge on large bag long nozzle 4 that external diameter is 260mm, adopting mechanical arm cylinder 3 to be docked at together with large bag long nozzle 4 external diameter is under the large bag of 170mm on the mouth of a river 1.Argon gas source of the gas is connected in straight tube 9 outside of argon blowing pipeline 5, argon gas enters annular pipe 10 with the flow of 40NL/min by straight tube 9, be blown into argon gas by the aperture 13 on annular pipe 10 to by the first packing ring 2 and the second packing ring 7 and the bag end 6, the lower mouth of a river 1, the relative confined space that formed between long nozzle 4 and cylinder 3 again, make formation pressure-fired in this confined space.Because this device is enclosed within the outside of the lower mouth of a river 1 of large bag and long nozzle 4; it effectively can reduce long nozzle 4 rocking in casting process; slightly rock even if produce in casting process and cause the contact position between the lower mouth of a river 1 and long nozzle 4 to have gap; because being filled with in a steady stream of argon gas makes to there is pressure-fired in confined space always; outside air can be stoped to enter from gap and be oxidized molten steel, thus play molding casting and prevent the effect of molten steel secondary oxidation.
It should be noted last that, above detailed description of the invention is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to example, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (7)
1. the lower cast protective device between the mouth of a river and long nozzle of large bag, is characterized in that: comprise the cylinder covered on described large bag long nozzle and the argon blowing pipeline be arranged at the bottom of described cylinder cylinder; Be provided with circular hole at the bottom of described cylinder cylinder, under making described large bag, the mouth of a river is connected with described long nozzle through at the bottom of described cylinder cylinder; Be provided with the first packing ring between at the bottom of outer surface at the bottom of described cylinder cylinder and described large handbag, at the bottom of described cylinder cylinder, between inner surface and described long nozzle, be provided with the second packing ring.
2. cast protective device according to claim 1; it is characterized in that: described argon blowing pipeline comprises the annular pipe be arranged at the bottom of described cylinder cylinder; and being used for the straight tube on external argon delivery lines road with described annular circular pipe communicated, described annular pipe is provided with the aperture of discharging for argon gas on the direction of inner surface at the bottom of described cylinder cylinder.
3. cast protective device according to claim 2, is characterized in that: the number of described aperture is 10-30, is evenly distributed on described annular pipe, and the aperture of described aperture is 1/4-1/2 times of described annular pipe caliber.
4. cast protective device according to claim 3, is characterized in that: the circle diameter of described annular pipe is 1.05-1.1 times of mouth of a river external diameter under described large bag.
5. cast protective device according to claim 1; it is characterized in that: the outer surface at the bottom of described cylinder cylinder is provided with that the degree of depth is 2-5mm, width be 40-60mm for placing the first toroidal cavity of described first packing ring, the inner surface at the bottom of described cylinder cylinder is provided with that the degree of depth is 2-5mm, width is that 20-40mm is for placing the second toroidal cavity of described second packing ring.
6. cast protective device according to claim 5, is characterized in that: the internal diameter of described cylinder is along the 1-1.05 of external diameter times on described large bag long nozzle, and the aperture of circular hole at the bottom of described cylinder cylinder is 1-1.05 times of mouth of a river external diameter under described large bag.
7. cast protective device according to claim 6, is characterized in that: the wall thickness of described cylinder is 10-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420681552.9U CN204220985U (en) | 2014-11-11 | 2014-11-11 | Cast protective device under a kind of large bag between the mouth of a river and long nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420681552.9U CN204220985U (en) | 2014-11-11 | 2014-11-11 | Cast protective device under a kind of large bag between the mouth of a river and long nozzle |
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| CN204220985U true CN204220985U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420681552.9U Active CN204220985U (en) | 2014-11-11 | 2014-11-11 | Cast protective device under a kind of large bag between the mouth of a river and long nozzle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| CN112808961A (en) * | 2020-12-30 | 2021-05-18 | 河钢股份有限公司承德分公司 | Method for casting continuous casting steel tundish |
| CN112893828A (en) * | 2019-11-19 | 2021-06-04 | 上海梅山钢铁股份有限公司 | Gas sealing method for continuous casting ladle long nozzle suspension mode |
-
2014
- 2014-11-11 CN CN201420681552.9U patent/CN204220985U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106881457A (en) * | 2017-03-28 | 2017-06-23 | 马鞍山钢铁股份有限公司 | Molten steel pours device and part is sealed with argon and the method that part carries out argon envelope is sealed using argon |
| CN112893828A (en) * | 2019-11-19 | 2021-06-04 | 上海梅山钢铁股份有限公司 | Gas sealing method for continuous casting ladle long nozzle suspension mode |
| CN112808961A (en) * | 2020-12-30 | 2021-05-18 | 河钢股份有限公司承德分公司 | Method for casting continuous casting steel tundish |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |
|
| CP01 | Change in the name or title of a patent holder |