Tundish nozzle structure for stopper rod

Abstract

Compared with the prior art, the tundish nozzle structure for the stopper rod comprises a stopper rod lower nozzle, an upper nozzle structure and a lower nozzle structure, the brick cup structure is connected with the stopper lower nozzle and the stopper upper nozzle; a water gap quick-change mechanism; the upper part of the nozzle quick-change mechanism is matched and connected with the upper nozzle structure; the lower part of the nozzle quick-change mechanism is matched and connected with the lower nozzle structure; the interior of the brick cup structure comprises a first conical surface structure and a second conical surface structure opposite to the conical surface of the first conical surface structure; the first conical surface structure is matched and connected with the stopper rod drain hole; compared with the prior art, the tundish nozzle structure for the stopper rod can solve the technical problem that molten steel is prone to flowing out of a gap after an accident occurs in the prior art, the nozzle is rapidly closed to achieve pouring stopping when a pouring accident occurs, the structure is simple, operation is convenient, and the production efficiency is improved. The problem of molten steel leakage is solved, secondary accidents are avoided, and the safety of continuous casting production is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting production, in particular to a tundish water nozzle structure for a stopper rod. Background Art

[0002] The stopper rod flow control system adjusts the flow rate of molten steel entering the crystallizer by controlling the size of the annular gap between the stopper rod head and the water inlet of the tundish. When the area of ​​the annular gap changes, the steel flow passing through will also change accordingly, thereby controlling the height of molten steel and the pulling speed in the crystallizer. At present, the stopper rod flow control system is widely used in continuous casting tundish casting. During the continuous casting process, the stopper rod controls the flow rate of molten steel by adjusting the size of the annular gap between the stopper rod and the water inlet. The precise control of the flow rate of molten steel can be achieved by adjusting the size of the annular gap between the stopper rod and the water inlet. When a casting accident occurs in the water inlet of the tundish commonly used in steel mills in conjunction with the stopper rod, the usual practice in the prior art is to use an accident gate to break the entire water inlet of the stopper rod, and then block the water inlet of the stopper rod to stop casting, and then handle the accident later.

[0003] However, the accident gate itself is easily deformed after breaking the entire water inlet of the stopper rod, resulting in the water inlet not being closed tightly after the accident gate is deformed, which in turn causes the molten steel to easily flow out from the gap between the accident gate and the bottom of the ladle, causing a secondary accident.

[0004] Therefore, how to provide a tundish water inlet structure for a stopper rod that can overcome the technical problem in the prior art that molten steel easily flows out of the gap after an accident occurs, and achieve the goal of quickly closing the water inlet to stop pouring when an accident occurs in casting, overcome the problem of molten steel leakage and avoid secondary accidents, has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a tundish water inlet structure for a stopper rod, which can overcome the technical problem in the prior art that molten steel is easy to flow out of the gap after an accident occurs, so as to quickly close the water inlet to stop casting when an accident occurs in casting, overcome the problem of molten steel leakage to avoid secondary accidents, and ensure the safety of continuous casting production.

[0006] The technical solution provided by the utility model is as follows:

[0007] The utility model provides a tundish water inlet structure for a stopper rod, comprising: a stopper rod water inlet, an upper water inlet structure, and a lower water inlet structure;

[0008] A base brick structure connecting the stopper rod outlet and the upper outlet structure;

[0009] A water inlet quick-change mechanism; the upper portion of the water inlet quick-change mechanism is cooperatively connected with the upper water inlet structure; the lower portion of the water inlet quick-change mechanism is cooperatively connected with the lower water inlet structure;

[0010] The interior of the seat brick structure includes: a first conical surface structure and a second conical surface structure opposite to the conical surface of the first conical surface structure;

[0011] The first conical surface structure is connected to the stopper rod outlet;

[0012] The second conical surface structure is cooperatively connected to the upper water inlet structure.

[0013] Furthermore, in a preferred embodiment of the utility model, it further comprises: a first sealing structure provided at the connection between the seat brick structure and the stopper rod lower water outlet and at the connection between the seat brick structure and the upper water outlet structure.

[0014] Furthermore, in a preferred embodiment of the present invention, it further comprises: a second sealing structure provided at the connection between the upper water inlet structure and the water inlet quick-change mechanism and at the connection between the lower water inlet structure and the water inlet quick-change mechanism.

[0015] Furthermore, in a preferred embodiment of the utility model, an annular mounting groove structure is provided on the connection between the upper water inlet structure and the water inlet quick-change mechanism and on the contact surface between the lower water inlet structure and the water inlet quick-change mechanism, and the annular mounting groove is used to install the second sealing structure.

[0016] Furthermore, in a preferred embodiment of the present invention, the width of the annular mounting groove is 4 to 8 mm, and the depth is 2 to 4 mm.

[0017] Furthermore, in a preferred embodiment of the present invention, the brick seat structure includes a brick seat body and a brick seat heightening structure extending and communicating with the brick seat body.

[0018] The utility model provides a tundish nozzle structure for a stopper rod, characterized in that the overall height of the seat brick structure is 290-340 mm.

[0019] Furthermore, in a preferred embodiment of the present invention, the overall height of the seat brick structure is 310-330 mm.

[0020] Furthermore, in a preferred embodiment of the present invention, a criss-cross heat dissipation channel structure is provided inside the base brick structure and / or heat dissipation fins are provided on the periphery of the base brick structure.

[0021] Furthermore, in a preferred embodiment of the present invention, the first sealing structure and the second sealing structure are silicone sealing ring structures or metal sealing ring structures.

[0022] The utility model provides a tundish water inlet structure for a stopper rod, which, compared with the prior art, comprises: a stopper rod lower water inlet, an upper water inlet structure, and a lower water inlet structure; a seat brick structure connecting the stopper rod lower water inlet and the upper water inlet structure; a water inlet quick-change mechanism; the upper part of the water inlet quick-change mechanism is cooperatively connected to the upper water inlet structure; the lower part of the water inlet quick-change mechanism is cooperatively connected to the lower water inlet structure; the interior of the seat brick structure comprises: a first conical surface structure and a second conical surface structure opposite to the conical surface of the first conical surface structure; the first conical surface structure is cooperatively connected to the stopper rod lower water inlet; the second conical surface structure is cooperatively connected to the upper water inlet structure. Compared with the prior art, the tundish water inlet structure for a stopper rod provided by the utility model can overcome the technical problem in the prior art that molten steel easily flows out of the gap after an accident occurs, so as to achieve the goal of quickly closing the water inlet to stop pouring when an accident occurs in casting, overcome the problem of molten steel leakage to avoid secondary accidents, and ensure the safety of continuous casting production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the principle of the tundish nozzle structure for the stopper rod provided in an embodiment of the utility model.

[0025] Figure 2 It is a schematic diagram of the tundish nozzle structure for the stopper rod in the prior art. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in the utility model, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that when an element is referred to as being "fixed on" or "set on" another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

[0030] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present utility model can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present utility model without affecting the effects and purposes that can be achieved by the present utility model.

[0031] like Figure 1 to Figure 2 As shown, the tundish water inlet structure for the stopper rod provided by the embodiment of the utility model comprises: a stopper rod water inlet 2.1, an upper water inlet structure 2.3, and a lower water inlet structure 2.4; a base brick structure 2.2 connecting the stopper rod water inlet 2.1 and the upper water inlet structure 2.3; a water inlet quick-change mechanism 2.5; the upper part of the water inlet quick-change mechanism 2.5 is cooperatively connected with the upper water inlet structure 2.3; the lower part of the water inlet quick-change mechanism 2.5 is cooperatively connected with the lower water inlet structure 2.4; the interior of the base brick structure 2.2 comprises: a first conical surface structure Z1 and a second conical surface structure Z2 opposite to the conical surface of the first conical surface structure; the first conical surface structure Z1 is cooperatively connected to the stopper rod water inlet 2.1; the second conical surface structure Z2 is cooperatively connected to the upper water inlet structure 2.3.

[0032] The utility model provides a tundish water inlet structure for a stopper rod. Compared with the prior art, the stopper rod water inlet 2.1, the upper water inlet structure 2.3, the lower water inlet structure 2.4; a base brick structure 2.2 connecting the stopper rod water inlet 2.1 and the upper water inlet structure 2.3; a water inlet quick-change mechanism 2.5; the upper part of the water inlet quick-change mechanism 2.5 is matched and connected with the upper water inlet structure 2.3; the lower part of the water inlet quick-change mechanism 2.5 is matched and connected with the lower water inlet structure 2.4; the interior of the base brick structure 2.2 includes: a first conical surface structure Z1 and a A second conical surface structure Z2 is opposite to the conical surface of the first conical surface structure; the first conical surface structure Z1 is connected to the lower water inlet 2.1 of the stopper rod; the second conical surface structure Z2 is connected to the upper water inlet structure 2.3. Compared with the prior art, the tundish water inlet structure for the stopper rod provided by the utility model can overcome the technical problem that molten steel is easy to flow out of the gap after an accident occurs in the prior art, so as to quickly close the water inlet to stop casting when an accident occurs in casting, overcome the problem of molten steel leakage to avoid secondary accidents, and ensure the safety of continuous casting production.

[0033] The technical solution of the utility model is described in detail below in conjunction with specific embodiments:

[0034] Specifically, in a specific embodiment of the utility model, it also includes: a first sealing structure provided at the connection between the seat brick structure 2.2 and the stopper rod lower water outlet 2.1 and at the connection between the seat brick structure 2.2 and the upper water outlet structure 2.3.

[0035] Specifically, in a specific embodiment of the utility model, it also includes: a second sealing structure provided at the connection between the upper water inlet structure and the water inlet quick-change mechanism 2.5 and at the connection between the lower water inlet structure 2.4 and the water inlet quick-change mechanism 2.5.

[0036] Specifically, in a specific embodiment of the utility model, an annular mounting groove structure is provided on the connection between the upper water inlet structure and the water inlet quick-change mechanism 2.5 and on the contact surface between the lower water inlet structure 2.4 and the water inlet quick-change mechanism 2.5, and the annular mounting groove is used to install the second sealing structure.

[0037] Specifically, in a specific embodiment of the utility model, the width of the annular installation groove is 4-8 mm, and the depth is 2-4 mm. More specifically, the width of the annular installation groove is 5 mm, and the depth is 3 mm. The annular installation groove is made of high temperature resistant and corrosion resistant materials, such as stainless steel or ceramics, to ensure stability and reliability during the continuous casting process. In terms of processing, the surface of the annular installation groove should be smooth and free of burrs to ensure a close fit between the sealing material and the groove surface.

[0038] The upper water inlet structure 2.3 comprises an upper water inlet body and an upper water inlet zirconium core, and the lower water inlet structure 2.4 comprises a lower water inlet body and a lower water inlet zirconium core coaxial with the upper water inlet zirconium core.

[0039] Specifically, in a specific embodiment of the present utility model, the seat brick structure 2.2 includes a brick seat body and a brick seat heightening structure extending and communicating with the brick seat body.

[0040] Specifically, in a specific embodiment of the present utility model, the overall height of the seat brick structure 2.2 is 290-340 mm.

[0041] Specifically, in a specific embodiment of the present utility model, the overall height of the seat brick structure 2.2 is 310-330 mm.

[0042] Specifically, in a specific embodiment of the utility model, a crisscross heat dissipation channel structure is provided inside the base brick structure 2.2 and / or heat dissipation fins are provided outside the base brick structure 2.2. A plurality of crisscross heat dissipation channels are designed inside the base brick structure 2.2 to form a three-dimensional mesh structure to increase the heat conduction path and improve the heat dissipation effect.

[0043] Specifically, in a specific embodiment of the present invention, the first sealing structure and the second sealing structure are silicone sealing rubber ring structures or metal sealing ring structures.

[0044] Among them, the main innovation of the technical solution of the utility model is to replace the emergency gate in the prior art with a water inlet quick-change mechanism. The water inlet quick-change mechanism is a mature device in the prior art, and generally includes a slide, a sliding base, a sliding plate, a sliding pressure plate, a gas pressure spring and other components. The slide is used to locate the water inlet, the sliding base and the sliding plate are used to support the water inlet and control its sliding, and the sliding pressure plate is pressed tightly on the water inlet by the action of the gas pressure spring to ensure the stability of the water inlet during the replacement process. When the water inlet needs to be replaced, the sliding plate is slid along the slide through the operating mechanism to push the damaged water inlet out of the working position. At the same time, the spare water inlet is pushed into the working position under the action of the gas pressure spring to complete the replacement of the water inlet. It is suitable for water inlets of different specifications and has high versatility.

[0045] To elaborate more specifically, the stopper rod flow control system adjusts the flow rate of molten steel entering the crystallizer by controlling the size of the annular gap between the stopper rod head and the water inlet of the tundish. When the area of ​​the annular gap changes, the flow of steel passing through will also change accordingly, thereby controlling the height of the molten steel and the pulling speed in the crystallizer. At present, the stopper rod flow control system is widely used in the continuous casting tundish casting. During the continuous casting process, the stopper rod controls the flow rate of molten steel by adjusting the size of the annular gap between the stopper rod and the water inlet. The precise control of the flow rate of molten steel can be achieved by adjusting the size of the annular gap between the stopper rod and the water inlet. When a casting accident occurs at the water inlet of the tundish commonly used in steel plants in conjunction with the stopper rod, the usual practice in the prior art is to use an accident gate to break the entire water inlet of the stopper rod, and then block the water inlet of the stopper rod to stop casting, and then handle the accident later. However, the accident gate itself is prone to deformation after breaking the entire water inlet of the stopper rod, so that the water inlet is not tightly closed after the accident gate is deformed, which in turn causes the molten steel to easily flow out from the gap between the accident gate and the bottom of the tundish, causing technical problems such as secondary accidents. Specifically, Figure 2 shown.

[0046] Based on the above technical problems, the tundish water inlet structure for the stopper rod involved in the embodiment of the utility model can overcome the technical problem in the prior art that molten steel easily flows out from the gap between the accident gate and the bottom of the tundish and causes secondary accidents, and can quickly close the water inlet to stop pouring when an accident occurs in casting, thereby overcoming the problem of molten steel leakage and avoiding secondary accidents. The technical means to solve the problem is to divide the original stopper rod water inlet into three parts, and replace the gate in the prior art with a water inlet quick-change mechanism. When an accident occurs, the water inlet is closed by the water inlet quick-change mechanism, and the accident gate is no longer used, which means that secondary accidents caused by deformation of the accident gate will not occur. In addition, using this improved water inlet, such as Figure 1As shown, the stopper rod is 1.1, the submerged nozzle is 1.5, and the tundish nozzle structure for the stopper rod is composed of a stopper rod lower nozzle 2.1, an upper nozzle structure 2.3, and a lower nozzle structure 2.4. The upper nozzle structure 2.3 and the lower nozzle structure 2.4 are made to the same size as the general sizing nozzle. At the same time, the general nozzle quick-change mechanism 2.5 replaces the emergency gate 1.4 in the prior art, and the heightened and improved seat brick structure 2.2 replaces the ordinary seat brick in the prior art. The heightened seat brick 2.2 has two opposite cone surfaces Z1 and Z2 inside. The Z1 cone surface is installed with the stopper rod lower nozzle structure 2.1, and the Z2 cone surface is installed with the upper nozzle structure 2.3. In this way, when the casting is stopped due to an accident, the nozzle quick-change mechanism 2.5 is started to close the nozzle to stop the casting. The stopper nozzle involved in the embodiment of the utility model comprises a stopper lower nozzle, an upper nozzle structure and a lower nozzle structure, and a nozzle quick-change mechanism is added to replace the emergency gate 1.4 in the prior art. In addition, in the scheme of the utility model, the seat brick structure is designed to add an increased portion, and the seat brick has two opposite conical surfaces Z1 and Z2 inside, the stopper lower nozzle is installed on the Z1 conical surface, and the upper nozzle is installed on the Z2 conical surface, so as to overcome the secondary accident caused by the molten steel flowing out from the gap between the emergency gate and the bottom of the tundish due to the lax closure of the nozzle in the prior art.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tundish nozzle structure for a stopper rod, characterized in that: include: A stopper water outlet (2.1), an upper water outlet structure (2.3), and a lower water outlet structure (2.4); A base brick structure (2.2) connecting the stopper rod outlet (2.1) and the outlet structure (2.3); A water inlet quick-change mechanism (2.5); the upper portion of the water inlet quick-change mechanism (2.5) is cooperatively connected to the upper water inlet structure (2.3); the lower portion of the water inlet quick-change mechanism (2.5) is cooperatively connected to the lower water inlet structure (2.4); The interior of the seat brick structure (2.2) comprises: a first conical surface structure (Z1) and a second conical surface structure (Z2) opposite to the conical surface of the first conical surface structure; The first conical surface structure (Z1) is cooperatively connected to the stopper rod outlet (2.1); The second conical surface structure (Z2) is cooperatively connected to the upper water inlet structure (2.3).

2. The tundish nozzle structure for the stopper rod according to claim 1, characterized in that: Also includes: A first sealing structure is provided at the connection between the seat brick structure (2.2) and the stopper rod lower water outlet (2.1) and at the connection between the seat brick structure (2.2) and the upper water outlet structure (2.3).

3. The tundish nozzle structure for the stopper rod according to claim 2, characterized in that: Also includes: A second sealing structure is provided at the connection between the upper water inlet structure and the water inlet quick-change mechanism (2.5) and at the connection between the lower water inlet structure (2.4) and the water inlet quick-change mechanism (2.5).

4. The tundish nozzle structure for the stopper rod according to claim 3, characterized in that: An annular mounting groove structure is provided on the contact surface at the connection between the upper water inlet structure and the water inlet quick-change mechanism (2.5) and at the connection between the lower water inlet structure (2.4) and the water inlet quick-change mechanism (2.5), and the annular mounting groove is used to install the second sealing structure.

5. The tundish nozzle structure for the stopper rod according to claim 4, characterized in that: The annular installation groove has a width of 4 to 8 mm and a depth of 2 to 4 mm.

6. The tundish nozzle structure for the stopper rod according to claim 2, characterized in that: The brick seat structure (2.2) comprises a brick seat body and a brick seat heightening structure extending and communicating with the brick seat body.

7. The tundish nozzle structure for the stopper rod according to claim 2, characterized in that: The overall height of the seat brick structure (2.2) is 290-340 mm.

8. The tundish nozzle structure for the stopper rod according to claim 6, characterized in that: The overall height of the seat brick structure (2.2) is 310-330 mm.

9. The tundish nozzle structure for the stopper rod according to claim 1, characterized in that: The interior of the base brick structure (2.2) is provided with a crisscross heat dissipation channel structure and / or the periphery of the base brick structure (2.2) is provided with heat dissipation fins.

10. The tundish nozzle structure for a stopper rod according to any one of claims 3 to 5, characterized in that: The first sealing structure and the second sealing structure are both silicone sealing ring structures or metal sealing ring structures.

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