CN218134945U - Sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure - Google Patents
Sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure Download PDFInfo
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- CN218134945U CN218134945U CN202222054635.2U CN202222054635U CN218134945U CN 218134945 U CN218134945 U CN 218134945U CN 202222054635 U CN202222054635 U CN 202222054635U CN 218134945 U CN218134945 U CN 218134945U
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Abstract
The utility model discloses a liquid-sealed sealing gasket and a split submerged nozzle structure, wherein the liquid-sealed sealing gasket comprises a hollow and cylindrical outer shell, and a sealant filling layer and a central fiber layer which are arranged in the outer shell; the sealant filling layer is positioned above the central fiber layer, and the inside of the sealant filling layer is filled with powdery sealant; when the sealing device works, the liquid-sealed sealing gasket is sleeved at the joint of the upper water gap and the lower water gap, and the sealant is melted into a liquid slag film after being heated, so that the liquid sealing effect is realized on the joint of the water gaps; the casting protection effect of the integral submerged nozzle can be achieved, and the advantage that the split submerged nozzle can be replaced on line can be kept; the casting effect is protected, and the ton steel cost of the submerged nozzle and tundish refractory materials is greatly reduced.
Description
Technical Field
The utility model belongs to the technical field of it is sealed, especially, sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure.
Background
The submerged nozzle is a refractory material required in the continuous casting production process, is a molten steel channel for connecting a tundish and a crystallizer, plays roles in preserving the heat of molten steel, preventing the secondary oxidation of the molten steel and the like, and has an integral type and a split type.
The upper end of the integral water gap is contacted with the stopper rod, and the lower end of the integral water gap extends into the crystallizer, so that the protection effect is good because no seam exists in the middle; but the manufacturing cost is high (about 3-5 times of that of a split water gap), the split water gap cannot be replaced in the pouring process, the service life of the tundish is limited by the service life of the water gap and is generally not more than 12 hours; and when the water gap is abnormal in the baking and pouring processes, the flow or the whole group of pouring baskets can only stop pouring because the water gap cannot be replaced on line.
The split type submerged nozzle consists of an upper nozzle and a lower nozzle, the upper nozzle is built in a tundish bottom refractory material, the upper end of the upper nozzle is in contact with a stopper rod, the lower end of the upper nozzle is connected with the upper end of the lower nozzle, and the lower end of the lower nozzle extends into the crystallizer. The split type water gap has low manufacturing cost, the lower water gap can be replaced on line, and the pouring time of the tundish can not be limited by the service life of the water gap; when the pouring process of the water gap is abnormal, the pouring can be maintained by replacing the water gap; however, air is easily sucked into the joint of the upper water gap and the lower water gap to cause secondary oxidation. The joint is generally filled by using a fibrous sealing gasket between the upper water gap and the lower water gap of the current split-type upper port so as to reduce air suction. But the fiber paper sealing gasket still has pores, and the difference between the protection effect and the integral water gap is obvious. Even if argon is used at the joint, the surface and the subsurface quality of the strand are adversely affected by the bubbles sucked in.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model designs a liquid seal type sealing gasket and a split submerged nozzle structure, which solves the sealing problem of the upper and lower nozzle joints of the split submerged nozzle; the sealing gasket designed by the utility model can not only achieve the protection pouring effect of the whole submersed nozzle, but also keep the advantage that the split submersed nozzle can be replaced on line; the casting effect is protected, and the ton steel cost of the submerged nozzle and tundish refractory materials is greatly reduced.
The utility model discloses the technical scheme who adopts as follows:
a liquid-tight gasket, comprising:
the outer shell is of a hollow cylindrical structure;
a sealant filling layer disposed within the outer case, the sealant filling layer being filled with a sealant;
the fiber layer of center of setting in the shell, center fiber layer and sealant filling layer set gradually in the shell along the axial, and the sealant filling layer is located the top of center fiber layer.
Further, the total thickness of the liquid seal type sealing gasket is about 4-6mm, and the wall thickness of the outer shell is 0.1-0.3 mm; the height ratio of the sealant filling layer to the central fiber layer in the axial direction is 1/4-1/2.
Furthermore, the inner ring wall surface of the outer shell is matched with the outer shape of the upper water gap, and the outer ring wall surface of the outer shell is matched with the bowl opening shape of the lower water gap.
Furthermore, the outer shell is made of a surface ceramic fiber layer, and the surface ceramic fiber layer with a compact structure and good heat conduction avoids the erosion of the upper nozzle and the lower nozzle by the melted sealant.
Further, the sealant is made of CaO and SiO 2 、Al 2 O 3 、CaF 2 、MgO、B 2 O 3 The melting point of the mixture is 500-700 ℃, the mixture is powdery at normal temperature, and the mixture is melted into liquid state at the pouring temperature of the nozzle within 30-60 s.
Further, the shell body is in a semi-closed design, and the central fiber layer is arranged on the opening side of the shell body.
A split submerged nozzle structure comprises an upper nozzle, a lower nozzle and a liquid seal type sealing gasket, wherein the liquid seal type sealing gasket is sleeved at the bottom of the upper nozzle, and the bottom of the upper nozzle is inserted into a bowl opening of the lower nozzle; and the sealant filler layer of the liquid-tight gasket was placed face up.
Further, a nozzle pocket brick and a tundish bottom steel plate are sequentially sleeved on the outer part of the upper end of the upper nozzle from top to bottom, and a tundish bottom refractory material is sleeved on the outer part of the nozzle pocket brick; the bottom end of the lower water gap is arranged on the bracket.
Furthermore, a groove for installing a liquid seal type sealing gasket is formed in the outer wall of the bottom of the upper water opening along the circumferential direction, and the liquid seal type sealing gasket is sleeved on the upper water opening and then is installed in a matched mode with the lower water opening.
The utility model has the advantages that:
(1) The utility model discloses a sealed pad of liquid seal formula simple structure does not change original continuous casting operation custom, can directly use between current upper nozzle, lower nozzle, convenient to use, and no safety risk.
(2) Due to the liquid sealing effect after the sealing agent is melted, the liquid-sealed sealing gasket can enable the joint of the upper water gap and the lower water gap to be well sealed, effectively isolate air, avoid secondary oxidation of molten steel and achieve the similar protection effect with the integral submerged water gap.
(3) The utility model discloses compromise the low cost and the operation flexibility of the good protection pouring effect of whole immersion nozzle and components of a whole that can function independently immersion nozzle, had the significance to improving the continuous casting billet quality and reducing resistant material cost, had great trade spreading value.
Drawings
FIG. 1 is a schematic view of the operation of a liquid-tight seal;
FIG. 2 is a cross-sectional view of a liquid-tight seal;
in the figure, 1, a tundish bottom refractory material; 2. the tundish wraps the bottom steel plate; 3. nozzle pocket brick; 4. a water feeding port; 5. a water outlet; 6. a liquid-tight seal; 7. a surface ceramic fiber layer; 8. a sealant filling layer; 9. a central fibrous layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The split submerged nozzle structure shown in the attached drawing 1 comprises an upper nozzle 4 and a lower nozzle 5; wherein, the outside of the upper end of the upper nozzle 4 is sleeved with the nozzle pocket brick 3 and the tundish bottom steel plate 2 from top to bottom in sequence, the outside of the nozzle pocket brick 3 is sleeved with the tundish bottom refractory material 1, and the tundish bottom refractory material 1 and the nozzle pocket brick 3 are fixed by using the tundish bottom steel plate 2. The bottom of the upper nozzle 4 is butted with the lower nozzle 5, specifically, a groove is arranged on the upper part of the lower nozzle 5, the groove is matched with the bottom of the upper nozzle 4, and the bottom of the upper nozzle 4 is just inserted into the groove (bowl mouth) of the lower nozzle 5. And a liquid seal type sealing gasket 6 is arranged at the matching part of the grooves of the upper water opening 4 and the lower water opening 5, and the liquid seal type sealing gasket 6 is used for sealing.
The structure of the liquid seal type sealing gasket 6 designed by the application is shown in fig. 2, and the liquid seal type sealing gasket 6 is of a hollow conical cylinder structure. The outer shell of the liquid seal type sealing gasket 6 is made of a surface ceramic fiber layer 7, a sealing agent filling layer 8 and a central fiber layer 9 are sequentially arranged inside the liquid seal type sealing gasket 6 along the axial direction, and a sealing agent is filled in the sealing agent filling layer 8.
In the present application, the outer shell of the liquid-sealed gasket 6 is designed to be half-open, that is, the inner wall surface, the outer wall surface and the top surface of the liquid-sealed gasket 6 are all made of the ceramic fiber layer 7, and the sealant is sealed in the liquid-sealed gasket 6 only through the central fiber layer 9, as shown in fig. 2. The ceramic fiber layer 7 is selected as the material of the outer shell of the liquid seal type sealing gasket 6 in the application because the ceramic fiber layer 7 has a compact structure and good heat conduction; can better wrap the sealing agent and protect the nozzle refractory materials (namely the upper nozzle 4 and the lower nozzle 5) from being corroded by the melted sealing agent.
In the present application, the central fiber layer 9 may be made of refractory fiber material, such as alumina fiber, crystal fiber, and ceramic fiber.
In the application, the sealant is made of CaO and SiO 2 、Al 2 O 3 、CaF 2 、MgO、B 2 O 3 Mixture of equal compositionThe melting point of the material is 500-700 ℃, the material is powdery at normal temperature, and the material can be melted into liquid state for 30-60 seconds at the pouring temperature of a water gap.
In the present application, the central fiber layer 9 is located below the sealant filling layer 8, and supports the sealant and prevents the sealant from entering molten steel after melting.
In the present application, the total thickness of the liquid-tight seal 6 is about 4 to 6mm, preferably 5mm; the thickness of the surface ceramic fiber layer 7 is 0.1-0.3 mm; the height ratio of the sealant filling layer 8 to the central fiber layer 9 in the axial direction is 1/3 to 1/2.
In the application, a groove for installing the liquid seal type sealing gasket 6 can be formed in the outer wall of the bottom of the upper water gap 4 along the circumferential direction, and the liquid seal type sealing gasket 6 is sleeved on the upper water gap 4 and then is installed in a matching manner with the lower water gap 5; conversely, a groove for installing the liquid seal gasket 6 can be formed in the lower water gap 5 along the circumferential direction for assembling the liquid seal gasket 6.
The following will be further explained in conjunction with the installation and working principle of the liquid-sealed gasket 6 of the present application:
before pouring the tundish, the liquid-sealed sealing gasket 6 is placed on the bowl opening of the lower nozzle 5 and is pushed up by the bracket of the lower nozzle 5, so that the liquid-sealed sealing gasket 6 is pressed by the upper nozzle 4 and the lower nozzle 5.
After the tundish is poured, the temperature of the upper nozzle 4 and the lower nozzle 5 rises along with pouring, the sealant in the liquid seal type sealing gasket 6 is heated and quickly melted, a layer of liquid slag film is formed between the upper nozzle 4 and the lower nozzle 5, air is isolated, and the liquid seal effect is achieved.
The above embodiments are only used to illustrate the design idea and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the content of the present invention and to implement the present invention, and the protection scope of the present invention is not limited to the above embodiments. Therefore, all the equivalent changes or modifications made according to the principles and design ideas disclosed by the present invention are within the scope of the present invention.
Claims (8)
1. A liquid-sealed gasket, characterized in that a liquid-sealed gasket (6) includes:
the outer shell is of a hollow cylindrical structure;
a sealant filling layer (8) arranged in the outer shell, wherein the sealant filling layer (8) is filled with sealant;
set up central fibrous layer (9) in the shell, central fibrous layer (9) and sealant filling layer (8) set gradually in the shell along the axial, and sealant filling layer (8) are located the top of central fibrous layer (9).
2. The liquid-tight sealing gasket according to claim 1, characterized in that the total thickness of the liquid-tight sealing gasket (6) is about 4-6mm, and the wall thickness of the outer casing is 0.1-0.3 mm; the height ratio of the sealant filling layer (8) to the central fiber layer (9) in the axial direction is 1/4-1/2.
3. The liquid-tight sealing gasket according to claim 1, characterized in that the inner ring wall of the outer housing is matched with the outer shape of the upper nozzle (4) and the outer ring wall of the outer housing is matched with the bowl shape of the lower nozzle (5).
4. The fluid-tight sealing gasket according to claim 1, characterised in that said outer casing is made of a surface ceramic fibre layer (7).
5. A liquid-tight sealing gasket according to any one of claims 1-4, characterised in that the outer casing is of semi-closed design, the central fibre layer (9) being arranged on the open side of the outer casing.
6. A split submerged nozzle structure, which is characterized by comprising an upper nozzle (4), a lower nozzle (5) and the liquid-sealed sealing gasket (6) according to claim 1, wherein the liquid-sealed sealing gasket (6) is sleeved at the bottom of the upper nozzle (4), and the bottom of the upper nozzle (4) is inserted into the bowl opening of the lower nozzle (5); and the sealant filling layer (8) of the liquid-tight gasket (6) is placed upward.
7. The split submerged nozzle structure of claim 6, wherein the outer part of the upper end of the upper nozzle (4) is sleeved with the nozzle brick cup (3) and the tundish bottom steel plate (2) from top to bottom in sequence, and the outer part of the nozzle brick cup (3) is sleeved with the tundish bottom refractory (1); the bottom end of the lower water gap (5) is arranged on the bracket.
8. The split submerged nozzle structure of claim 6, characterized in that the outer wall of the bottom of the upper nozzle (4) is provided with a groove along the circumferential direction for installing the liquid-tight sealing gasket (6), and the liquid-tight sealing gasket (6) is sleeved on the upper nozzle (4) and then is installed in cooperation with the lower nozzle (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222054635.2U CN218134945U (en) | 2022-08-05 | 2022-08-05 | Sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222054635.2U CN218134945U (en) | 2022-08-05 | 2022-08-05 | Sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218134945U true CN218134945U (en) | 2022-12-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222054635.2U Active CN218134945U (en) | 2022-08-05 | 2022-08-05 | Sealed pad of liquid seal formula and components of a whole that can function independently immersion nozzle structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218134945U (en) |
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2022
- 2022-08-05 CN CN202222054635.2U patent/CN218134945U/en active Active
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