Continuous casting tundish water opening air seal device

Abstract

The utility model discloses a continuous casting tundish water opening air sealing device, and relates to the technical field of continuous casting. The device comprises a steel ladle nozzle, a tundish long nozzle and an air sealing device body, the bottom end of the steel ladle nozzle extends to the inner upper portion of the tundish long nozzle, the air sealing device body comprises a connecting arm, a sealing mechanism and an air supply pipe, one end of the connecting arm is fixed to the top end of the tundish long nozzle, and the top end of the tundish long nozzle exceeds the connecting arm; a telescopic oil cylinder facing the tundish long nozzle is transversely fixed to the top of the other end of the connecting arm. By designing the novel air seal device, a relatively independent and closed space can be formed at the joint of the ladle nozzle and the tundish long nozzle, external air is isolated to a certain extent, a high-concentration argon atmosphere is formed at the joint of the ladle collector nozzle and the tundish long nozzle, the secondary oxidation degree of molten steel caused by air suction is reduced, and the service life of the molten steel is prolonged. And the purity of a poured casting blank is improved, and the risk of quality deterioration of molten steel is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to continuous casting technical field, especially, relate to a continuous casting tundish water gap gas seal device. BACKGROUND

[0002] Continuous casting in steel smelting industry is the key process of metal solidification forming, and the secondary oxidation protection of molten steel in pouring process is the key means to guarantee the quality of steel, the molten steel enters the tundish through the long water gap of tundish from the bottom water gap of ladle, and the movable connection of the long water gap of tundish is the major hidden trouble of molten steel gettering, and the argon is usually inhaled through the water gap connection, so that the surrounding is filled with argon to reduce the air concentration and reduce the oxidation degree of molten steel caused by gettering.

[0003] Under actual conditions, due to the poor sealing effect of the joint between the ladle water gap and the tundish long water gap, the gettering amount is large during pouring, even if the inhaled argon amount is large enough, due to the open area of the joint outside, the air concentration of the mixed gas of argon and air is still high, which causes serious oxidation of the molten steel.

[0004] Therefore, the design of the gas seal device to reduce the risk of secondary oxidation of molten steel is the problem to be solved by the workers in the field. SUMMARY

[0005] The utility model discloses a continuous casting tundish water gap gas seal device, through the design of novel gas seal device, can form relatively independent, airtight space at the joint between the ladle water gap and the tundish long water gap, a certain degree of isolation external air, form high concentration argon atmosphere at the joint between the ladle water gap and the tundish long water gap, reduce the secondary oxidation degree of molten steel caused by gettering, improve the purity of pouring billet, reduce the risk of quality deterioration of molten steel.

[0006] To solve the above technical problem, the utility model is realized through the following technical schemes:

[0007] The utility model discloses a continuous casting tundish water gap gas seal device, including the water gap of ladle, tundish long water gap and gas seal device body, the water gap of ladle bottom end extends to the inner upper portion of tundish long water gap;

[0008] The gas seal device body includes connecting arm, sealing mechanism and gas supply pipe;

[0009] One end of the connecting arm is fixed at the top end of the tundish long water gap, the top end of the tundish long water gap exceeds the connecting arm, and a telescopic oil cylinder facing the tundish long water gap is horizontally fixed at the top of the other end of the connecting arm;

[0010] The sealing mechanism includes a base and a group of half sleeve bodies;

[0011] The base is a U-shaped plate structure, the base is horizontally arranged above the connecting arm, the telescopic rod end of the telescopic oil cylinder is fixed to the side surface of the base, the two side plates of the base are both fixed with a side pushing oil cylinder which is vertically arranged with the telescopic oil cylinder, and the middle part of the base and away from the telescopic oil cylinder is provided with a position giving opening which is opposite to the position of the long nozzle of the tundish.

[0012] The two half sleeve bodies are respectively fixed to the telescopic rod ends of the two side pushing oil cylinders, and the two half sleeve bodies are sleeved to form a sealing sleeve at the connecting position of the ladle nozzle and the long nozzle of the tundish, and the inner top end and the inner bottom end of the half sleeve body are respectively provided with a sealing edge which is attached to the outer surface of the ladle nozzle and the long nozzle of the tundish.

[0013] One side surface of the half sleeve body is provided with an interface, one end of the gas supply pipe is input with inert gas, and the other end of the gas supply pipe is connected with the interface.

[0014] Further, the ladle nozzle and the long nozzle of the tundish are both circular pipe structures, and the cross section of the half sleeve body is a semicircular structure.

[0015] Further, the ladle nozzle and the long nozzle of the tundish are both square pipe structures, and the cross section of the half sleeve body is a U-shaped structure.

[0016] Further, the connecting arm is provided with a supporting edge on both sides, and the bottom of the base is provided with a wear-resistant strip which slides along the supporting edge or a roller which rolls along the supporting edge.

[0017] Further, the top of the connecting arm and the position on the side of the telescopic oil cylinder shell are linearly provided with a plurality of pipe clamps, and the gas supply pipe is fixed to the connecting arm through the pipe clamps.

[0018] Further, the connecting arm is a plate structure, the end of the connecting arm is provided with a through hole, and the end of the connecting arm is sleeved on the long nozzle of the tundish through the through hole and is welded and fixed.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model discloses a novel gas sealing device, which can form a relatively independent and sealed space at the joint of the ladle nozzle and the long nozzle of the tundish, isolate the external air to a certain extent, form a high-concentration argon atmosphere at the joint of the ladle nozzle and the long nozzle of the tundish, reduce the secondary oxidation of the molten steel caused by air absorption, improve the purity of the cast blank, and reduce the risk of quality deterioration of the molten steel.

[0021] 2. The telescopic oil cylinder can control the sealing mechanism to approach or move away from the nozzle connecting position, and the telescopic oil cylinder can be moved only after the pouring is stable, and the joint position can be moved away after the pouring is completed, so that the interference caused by the removal of the ladle is avoided, and the service life is ensured.

[0022] Of course, any product implementing the present application does not necessarily need to achieve all the advantages mentioned above simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0024] Figure 1 It is a structural schematic view of the embodiment one of the present application.

[0025] Figure 2 It is a structural sectional view of the embodiment one.

[0026] Figure 3 It is a structural schematic view of the embodiment two.

[0027] In the drawings, the component list represented by each number is as follows:

[0028] 1-ladle nozzle, 2-tundish long nozzle, 3-connecting arm, 4-gas supply pipe, 5-base, 6-semi-cover body, 301-telescopic oil cylinder, 302-supporting edge, 303-pipe clamp, 501-side pushing oil cylinder, 502-giving way opening, 601-sealing edge. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application. Embodiment 1

[0030] Please refer to Figures 1-2 The present application is a continuous casting tundish nozzle gas sealing device, which comprises a ladle nozzle 1, a tundish long nozzle 2 and a gas sealing device body, the bottom end of the ladle nozzle 1 extends to the inner upper part of the tundish long nozzle 2.

[0031] The gas sealing device body comprises a connecting arm 3, a sealing mechanism and a gas supply pipe 4.

[0032] One end of the connecting arm 3 is fixed at the top end of the tundish long nozzle 2, the top end of the tundish long nozzle 2 exceeds the connecting arm 3, and the other end of the connecting arm 3 is horizontally fixed at the top with a telescopic oil cylinder 301 facing the tundish long nozzle 2.

[0033] The sealing mechanism comprises a base 5 and a set of half sleeve bodies 6;

[0034] The base 5 is a U-shaped plate structure, which is horizontally arranged above the connecting arm 3, and the end of the telescopic rod of the telescopic oil cylinder 301 is fixed to the side of the base 5. The two side plates of the base 5 are both fixed with side pushing oil cylinders 501 which are vertically distributed with the telescopic oil cylinder 301. The middle part of the base 5, away from the telescopic oil cylinder 301, is provided with a position giving port 502 which is opposite to the position of the tundish long nozzle 2.

[0035] The two half sleeve bodies 6 are respectively fixed to the end of the telescopic rod of the two side pushing oil cylinders 501, and the two half sleeve bodies 6 form a sealing sleeve around the connection between the ladle nozzle 1 and the tundish long nozzle 2. The inner top end and the inner bottom end of the half sleeve body 6 are respectively provided with a sealing edge 601 which is in contact with the outer surface of the ladle nozzle 1 and the tundish long nozzle 2.

[0036] The circumferential surface of one half sleeve body 6 is provided with an interface, and one end of the gas supply pipe 4 is input with inert gas, and the other end of the gas supply pipe 4 is connected with the interface.

[0037] As shown in the figure, Figures 1-2 The ladle nozzle 1 and the tundish long nozzle 2 are both circular pipe structures, and the cross section of the half sleeve body 6 is a semicircular structure.

[0038] As shown in the figure, Figure 1 The two sides of the connecting arm 3 are both provided with a support edge 302, and the bottom of the two sides of the base 5 is both provided with a wear-resistant strip which slides along the support edge 302 or a roller which rolls along the support edge 302.

[0039] As shown in the figure, Figure 1 The top of the connecting arm 3 and the position on the side of the cylinder shell of the telescopic oil cylinder 301 are linearly provided with a plurality of pipe clamps 303, and the gas supply pipe 4 is fixed with the connecting arm 3 through the pipe clamps 303.

[0040] As shown in the figure, Figure 2 The connecting arm 3 is a plate structure, the end of the connecting arm 3 is provided with a through hole, and the end of the connecting arm 3 is sleeved on the tundish long nozzle 2 through the through hole and is welded and fixed.

[0041] The working principle of the embodiment is as follows: after the ladle nozzle 1 and the tundish long nozzle 2 are positioned and the pouring is stable, the base 5 is controlled to move to the tundish long nozzle 2 through the telescopic oil cylinder 301, and after the movement is completed, the two side pushing oil cylinders 501 are controlled to start, and the relative movement of the two half sleeve bodies 6 is controlled until they are in contact with each other to form a sealing sleeve. The final form of the sealing sleeve is shown in the figure, Figures 1-2 The sealing sleeve can form a seal between the ladle nozzle 1 and the tundish long nozzle 2, and the inert gas is supplied through the gas supply pipe 4 to play a protective role. Embodiment 2

[0042] The difference between the embodiment and the first embodiment is that:

[0043] As shown in Figure 3 The ladle nozzle 1 and the tundish long nozzle 2 are both square tube structures, and the half sleeve body 6 is a U-shaped structure.

[0044] In the description of the present specification, the description referring to the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0045] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and do not limit the present application to the specific embodiments described. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application. The present application is limited only by the claims and their full scope and equivalents.

Claims

1. A continuous casting tundish nozzle gas sealing device, comprising a ladle nozzle (1), a tundish long nozzle (2) and a gas sealing device body, the bottom end of the ladle nozzle (1) extending to the inner upper part of the tundish long nozzle (2), characterized in that: the gas sealing device body comprises a connecting arm (3), a sealing mechanism and a gas supply pipe (4); one end of the connecting arm (3) is fixed at the top end of the tundish long nozzle (2), the top end of the tundish long nozzle (2) exceeds the connecting arm (3), and the other end of the connecting arm (3) is horizontally fixed with a telescopic oil cylinder (301) towards the tundish long nozzle (2); the sealing mechanism comprises a base (5) and a set of half sleeve bodies (6); the base (5) is a U-shaped plate structure, the base (5) is horizontally arranged above the connecting arm (3), the telescopic rod end of the telescopic oil cylinder (301) is fixed with the side of the base (5), side pushing oil cylinders (501) vertically distributed with the telescopic oil cylinder (301) are fixed at both side plates of the base (5), and a gap (502) opposite to the position of the tundish long nozzle (2) is arranged at the middle part of the base (5) away from the telescopic oil cylinder (301); two half sleeve bodies (6) are respectively fixed at the telescopic rod ends of the two side pushing oil cylinders (501), and the two half sleeve bodies (6) form a sealing sleeve around the connection between the ladle nozzle (1) and the tundish long nozzle (2), the inner top end and the inner bottom end of the half sleeve body (6) are respectively provided with sealing edges (601) matched with the outer surfaces of the ladle nozzle (1) and the tundish long nozzle (2); one side of the half sleeve body (6) is provided with an interface, one end of the gas supply pipe (4) is input with inert gas, and the other end of the gas supply pipe (4) is connected with the interface.

2. A gas seal for a continuous casting tundish nozzle according to claim 1, wherein The ladle nozzle (1) and the tundish long nozzle (2) are both circular pipe structures, and the half sleeve body (6) is a semicircular structure in cross section.

3. A gas seal for a continuous casting tundish nozzle according to claim 1, wherein The ladle nozzle (1) and the tundish long nozzle (2) are both square pipe structures, and the half sleeve body (6) is a U-shaped structure in cross section.

4. A gas seal for a continuous casting tundish nozzle according to claim 1, wherein Support edges (302) are arranged on both sides of the connecting arm (3), and wear-resistant strips sliding along the support edges (302) or rollers rolling along the support edges (302) are arranged at the bottoms of both sides of the base (5).

5. A gas seal for a continuous casting tundish nozzle according to claim 1, wherein A plurality of pipe clamps (303) are linearly arranged at the top of the connecting arm (3) and on the side of the cylinder shell of the telescopic oil cylinder (301), and the gas supply pipe (4) is fixed with the connecting arm (3) through the pipe clamps (303).

6. A gas seal for a continuous casting tundish nozzle according to claim 1, wherein The connecting arm (3) is a plate structure, the connecting arm (3) has a through hole at the end, and the connecting arm (3) is sleeved on the tundish long nozzle (2) through the through hole and is welded and fixed.

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