Quick-change submersed nozzle

Abstract

The utility model discloses a quick-change submersed nozzle, which comprises a nozzle body (1) and is characterized in that a circle of annular groove (2) is arranged on a plate surface of the nozzle body (1), an expansion sealing ring (3) is filled in the annular groove (2), and the expansion sealing ring (3) can work in an environment of 1500-1700 DEG C. The ring-shaped groove is dug on the plate surface of the quick-change submersed nozzle, and the expansion sealing ring which expands at high temperature is filled in the ring-shaped groove, so that the sealing between the tundish upper nozzle and the quick-change submersed nozzle can be realized in a molten steel casting process, air suction is prevented, and the quality of molten steel is improved.

Description

Technical Field

[0001] This utility model relates to the field of steel continuous casting technology, specifically a quick-change submersible nozzle. Background Technology

[0002] In continuous casting of steel, an upper tundish nozzle is installed above the submerged entry nozzle, and the submerged entry nozzle and the upper tundish nozzle are connected by a plate. Due to the high wear and tear of the submerged entry nozzle, it needs to be replaced frequently. To meet the replacement requirements of the submerged entry nozzle, a quick-change submerged entry nozzle that meets the requirements of rapid replacement has been developed.

[0003] However, it has been found in use that the frequent replacement of existing quick-change submersible nozzles makes it difficult to achieve proper sealing between the plates. As a result, air can easily be drawn between the quick-change submersible nozzle and the tundish nozzle, causing oxidation of the molten steel and reducing its quality. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the prior art by providing a quick-change immersion sprue that prevents air intake.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A quick-change immersion nozzle includes a nozzle body, characterized in that: an annular groove is provided on the plate surface of the nozzle body, and an expansion sealing ring is filled in the annular groove, which can work in an environment of 1500℃~1700℃.

[0007] The expansion sealing ring is made of expanded graphite.

[0008] The initial expansion temperature of the expanded graphite is 290℃~300℃.

[0009] The initial expansion temperature of the expanded graphite is 500℃.

[0010] The distance L1 between the annular groove and the inner cavity of the sprue body is greater than the distance L2 between the annular groove and the outer edge of the sprue body.

[0011] L1: L2 = 2.4~1.7:1.

[0012] The width of the annular groove is greater than the depth of the annular groove.

[0013] The width of the annular groove is 5cm to 8cm; the depth of the annular groove is 3cm to 6cm.

[0014] The operating temperature of the sprue body is 1550℃~1600℃.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] This invention features an annular groove carved into the surface of a quick-change submersible nozzle, filled with a high-temperature expanding sealing ring. This seal between the tundish nozzle and the quick-change submersible nozzle during steel casting prevents air intake and improves steel quality. Attached Figure Description

[0017] Appendix Figure 1 A partial structural schematic diagram of the quick-change immersion nozzle provided by this utility model;

[0018] Appendix Figure 2 This is a schematic diagram of the quick-change immersion water inlet provided by this utility model.

[0019] Wherein: 1—the sprue body; 2—the annular groove; 3—the expansion sealing ring. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0021] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended meaning of inclusion and that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0022] like Figure 1-2 As shown: A quick-change immersion nozzle includes a nozzle body 1, with an annular groove 2 provided on the plate surface of the nozzle body 1, and an expansion sealing ring 3 filled in the annular groove 2. The expansion sealing ring 3 can work in an environment of 1500℃~1700℃.

[0023] The expansion sealing ring 3 is preferably made of expanded graphite, and the initial expansion temperature of the selected expanded graphite is 290℃~300℃, preferably 500℃.

[0024] Regarding the selection of the position of the annular groove 2, the position of the annular groove 2 should be far away from the inner cavity of the sprue body 1. Therefore, the distance L1 between the annular groove 2 and the inner cavity of the sprue body 1 is greater than the distance L2 between the annular groove 2 and the outer edge of the sprue body 1. However, the position of the annular groove 2 should not be too far away from the inner cavity of the sprue body 1. Therefore, the preferred ratio is L1:L2=2.4~1.7:1.

[0025] In the design of the annular groove 2, expansion space must be provided for the expansion sealing ring 3. Therefore, the width of the annular groove 2 is greater than the depth of the annular groove 2. Specifically, the width of the annular groove 2 is 5cm to 8cm and the depth is 3cm to 6cm. Example

[0026] like Figure 1-2 As shown, this utility model provides a quick-change immersion sprue, including a sprue body 1. An annular groove 2 is formed on the surface of the sprue body 1. An expansion sealing ring 3 made of expanded graphite is filled within the annular groove 2. The expansion sealing ring 3 can operate in an environment of 1500℃~1700℃, and the initial expansion temperature of the selected expanded graphite is 500℃. The annular groove 2 is positioned approximately at one-third of the distance from the outer edge of the sprue body 1 to the surface of the inner cavity of the sprue body 1. The groove 2 has a width of 6cm and a depth of 5cm.

[0027] In use, the quick-change submersible nozzle is installed at the bottom of the tundish top nozzle and the two are connected by plates. The working temperature of the quick-change submersible nozzle is 1550℃~1600℃. The expansion sealing ring 3 made of expanded graphite will expand when the temperature is greater than 500℃, thereby achieving a seal between the tundish top nozzle and the quick-change submersible nozzle during the steel casting process, preventing air intake and improving the quality of the molten steel.

[0028] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0029] In the description of the embodiments of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] In this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model. Technologies not covered by this utility model can be implemented by existing technologies.

Claims

1. A quick-change submerged entry nozzle comprising a nozzle body (1), characterized in that: The plate surface of the water gap body (1) is provided with a ring-shaped groove (2), the distance L1 between the ring-shaped groove (2) and the inner cavity of the water gap body (1) is greater than the distance L2 between the ring-shaped groove (2) and the outer edge of the water gap body (1); the ring-shaped groove (2) is filled with an expansion sealing ring (3), the expansion sealing ring (3) can work in the environment of 1500-1700 DEG C; the expansion sealing ring (3) is made of expanded graphite; the initial expansion temperature of the expanded graphite is 500 DEG C.

2. The quick-change submerged entry nozzle according to claim 1, characterized in that: L1: L2=2.4-1.7:

1.

3. The quick-change submerged entry nozzle according to any one of claims 1-2, characterized in that: The width of the ring-shaped groove (2) is greater than the depth of the ring-shaped groove (2).

4. The quick-change submerged entry nozzle of claim 3, wherein: The width of the ring-shaped groove (2) is 5-8 cm; the depth of the ring-shaped groove (2) is 3-6 cm.

5. The quick-change submerged entry nozzle of claim 1, wherein: The working temperature of the water gap body (1) is 1550-1600 DEG C.

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