Double-layer sealing device for ladle long nozzle

Abstract

The double-layer sealing device comprises a long nozzle main body, a circulation cavity is formed in the long nozzle main body, a plurality of air outlet holes are locally formed in the inner side of the long nozzle main body, a connecting sleeve is fixedly installed on the outer side of the long nozzle main body, the connecting sleeve is communicated with the circulation cavity, and the air outlet holes are communicated with the circulation cavity. A rotary joint is screwed on the connecting sleeve, and the other end of the rotary joint is fixedly provided with a gas inlet pipe used for being connected with argon injection equipment; a sealing shell is fixedly installed on the outer side of the long nozzle body, and a sealing assembly used for argon sealing detection is arranged on the sealing shell. When argon leaks into the sealing shell, due to the sealing design of the sealing shell and the sealing cover, a second airtight space is formed, continuous leakage of the argon is avoided, waste is reduced, meanwhile, the argon leakage detector detects leakage of the argon, injection of the argon is stopped, and the connection position of a pipeline can be checked.

Description

Technical Field

[0001] The utility model relates to the technical field of shroud sealing, in particular to a double-layer sealing device for a large-sized shroud. Background Art

[0002] The application number is: CN202222845072.9. A long shroud argon blowing device relates to the technical field of long shrouds, including a long shroud body structure including a long shroud body, a connecting side frame is fixedly connected to the upper middle of the outer surface of the long shroud body, a transfer pipe is arranged inside the connecting side frame, a fixed clamp is fixedly connected to the lower end of the transfer pipe, and a fastening structure is arranged inside the fixed clamp. The utility model can push the inclined push block to move by rotating the fixing bolt when installing the air guide pipe through the arrangement of the inclined push block and the extrusion side groove, so that the extrusion side groove can be squeezed by the inclination of one side of the inclined push block, so that the connecting end ring moves upward, so that the rubber sealing gasket is squeezed to form a seal with the inside of the fixed clamp, and the inner ring surface of the connecting end ring is sealed with the fixed clamp by the sealing inner ring, so as to increase the sealing effect, and the degree of sealing can be adjusted by the extrusion of the inclined push block to prevent the leakage of argon gas;

[0003] The long water inlet can improve the air tightness between the transfer tube and the air duct through the design of the rubber sealing gasket. However, improving the air tightness alone cannot guarantee that there will be no leakage. When argon leakage occurs between the transfer tube and the air duct, it cannot be known in time, resulting in waste of argon. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a double-layer sealing device for a large bag with a long water outlet. When argon leaks into the sealing shell, a second airtight space is formed due to the sealing design of the sealing shell and the sealing cover to prevent the argon from continuing to leak and reduce waste. At the same time, an argon leak detector detects the leakage of argon and stops the injection of argon, so that the pipeline connection can be checked.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-layer sealing device for a large-sized shroud, comprising a shroud body, a flow cavity is provided inside the shroud body, a plurality of air outlet holes are partially provided on the inner side of the shroud body, a connecting sleeve is fixedly installed on the outer side of the shroud body, the connecting sleeve is communicated with the flow cavity, a rotary joint is screwed on the connecting sleeve, and an air inlet pipe for connecting an argon injection device is fixedly installed on the other end of the rotary joint;

[0007] A sealing shell is fixedly installed on the outer side of the long shroud body, and a sealing component for argon gas sealing detection is arranged on the sealing shell.

[0008] Preferably, a first sealing gasket is embedded in the inner side of the connecting sleeve, and an internal thread is provided between the opening end of the connecting sleeve and the first sealing gasket.

[0009] Preferably, the front end of the rotary joint is a non-threaded portion, which is inserted into the connecting sleeve and can cooperate with the first sealing gasket for sealing, and the rear end is a threaded portion for connecting with the connecting sleeve.

[0010] Preferably, the sealing assembly comprises a sealing cover arranged on the sealing shell, the sealing cover is provided with a through hole for the air intake pipe to pass through, and a second sealing gasket is embedded in the through hole.

[0011] Preferably, an argon gas leakage detector for detecting argon gas leakage is fixedly installed on the inner side of the sealing shell.

[0012] Preferably, the sealing cover is fixedly mounted to the sealing shell by a plurality of mounting bolts, and the sealing cover and the sealing shell are sealed by a sealing strip.

[0013] The utility model has the following beneficial effects:

[0014] Through the design of the rotary joint, the connecting sleeve and the first sealing gasket, the rotary joint and the connecting sleeve can be quickly connected and installed by means of threaded connection, and the first sealing gasket improves the air tightness between the rotary joint and the connecting sleeve;

[0015] Through the design of the sealing shell, the sealing cover and the argon leak detector, argon leaks into the sealing shell. Due to the sealing design of the sealing shell and the sealing cover, a second airtight space is formed to prevent the argon from continuing to leak and reduce waste. At the same time, the argon leak detector detects the leakage of argon and stops the injection of argon, and the pipeline connection can be checked. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a double-layer sealing device for a large bag long shroud proposed by the utility model;

[0017] Figure 2 This is a schematic cross-sectional structure diagram of a double-layer sealing device for a large bag long shroud proposed by the utility model;

[0018] Figure 3 The utility model is a schematic structural diagram of a sealing shell of a double-layer sealing device for a large bag with a long shroud.

[0019] In the figure: 1 is a main body of a long water outlet, 2 is a sealing shell, 3 is an argon gas leak detector, 4 is a connecting sleeve, 5 is a first sealing gasket, 6 is a rotary joint, 7 is an air inlet pipe, 8 is a sealing cover, 9 is a through hole, 10 is a second sealing gasket, 11 is an air outlet, and 12 is a flow cavity. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] Reference Figure 1-Figure 3 A double-layer sealing device for a large-sized shroud, comprising a shroud body 1, a flow cavity 12 is provided inside the shroud body 1, a plurality of air outlet holes 11 are partially provided on the inner side of the shroud body 1, a connecting sleeve 4 is fixedly installed on the outer side of the shroud body 1, the connecting sleeve 4 is communicated with the flow cavity 12, a first sealing gasket 5 is embedded on the inner side of the connecting sleeve 4, an internal thread is provided between the opening end of the connecting sleeve 4 and the first sealing gasket 5, a rotary joint 6 is screwed on the connecting sleeve 4, the front end of the rotary joint 6 is a non-threaded part, the connecting sleeve 4 is inserted into the connecting sleeve 4 to cooperate with the first sealing gasket 5 for sealing, and the rear end is a threaded part for connecting with the connecting sleeve 4, and the other end of the rotary joint 6 is fixedly installed with an air inlet pipe 7 for connecting an argon injection device;

[0023] A sealing shell 2 is fixedly installed on the outer side of the long water nozzle body 1, and a sealing component for argon gas sealing detection is arranged on the sealing shell 2. The sealing component includes a sealing cover 8 arranged on the sealing shell 2, and a through hole 9 for the air inlet pipe 7 to pass through is opened on the sealing cover 8. A second sealing gasket 10 is embedded in the through hole 9. An argon gas leakage detector 3 for argon gas leakage detection is fixedly installed on the inner side of the sealing shell 2. The sealing cover 8 is fixedly installed with the sealing shell 2 by multiple mounting bolts, which is convenient for disassembly and assembly, and the sealing cover 8 and the sealing shell 2 are sealed by a sealing strip, which improves the airtightness of the sealing shell 2 when it is closed.

[0024] Working principle:

[0025] When docking, firstly, one end of the air inlet pipe 7 is passed through the through hole 9, and then the end is screwed and fixed with the connecting sleeve 4 through the screw joint 6. After the docking is completed, the first sealing gasket 5 abuts against the screw joint 6, which has a sealing effect. Then, the sealing cover 8 is installed and fixed with the sealing shell 2, and finally, the air inlet pipe 7 is connected to the argon injection equipment for argon blowing;

[0026] When leakage occurs between the connecting sleeve 4 and the rotary joint 6, argon leaks into the sealing shell 2. Due to the design of the sealing shell 2 and the sealing cover 8, a second airtight space is formed to prevent the argon from continuing to leak and reduce waste. At the same time, the argon leak detector 3 detects the leakage of argon, stops the injection of argon, and checks the pipeline connection.

[0027] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A double-layer sealing device for a large-sized shroud, comprising a shroud body (1), characterized in that: A flow cavity (12) is provided inside the long shroud body (1), a plurality of air outlet holes (11) are partially provided on the inner side of the long shroud body (1), a connecting sleeve (4) is fixedly mounted on the outer side of the long shroud body (1), the connecting sleeve (4) is in communication with the flow cavity (12), a rotary joint (6) is screwed onto the connecting sleeve (4), and an air inlet pipe (7) for connecting to an argon injection device is fixedly mounted on the other end of the rotary joint (6); A sealing shell (2) is fixedly mounted on the outer side of the long shroud body (1), and a sealing component for argon gas sealing detection is arranged on the sealing shell (2).

2. A double-layer sealing device for a large-sized shroud according to claim 1, characterized in that: A first sealing gasket (5) is embedded inside the connecting sleeve (4), and an internal thread is provided between the opening end of the connecting sleeve (4) and the first sealing gasket (5).

3. A double-layer sealing device for a large-sized shroud according to claim 2, characterized in that: The front end of the rotary joint (6) is a non-threaded portion, which is inserted into the connecting sleeve (4) and can cooperate with the first sealing gasket (5) to perform sealing, and the rear end is a threaded portion, which is used to connect with the connecting sleeve (4).

4. A double-layer sealing device for a large-sized shroud according to claim 1, characterized in that: The sealing assembly comprises a sealing cover (8) arranged on the sealing shell (2), the sealing cover (8) being provided with a through hole (9) for the air intake pipe (7) to pass through, and a second sealing gasket (10) being embedded in the through hole (9).

5. A double-layer sealing device for a large-sized shroud according to claim 4, characterized in that: An argon gas leakage detector (3) for detecting argon gas leakage is fixedly installed on the inner side of the sealing shell (2).

6. A double-layer sealing device for a large-sized shroud according to claim 4, characterized in that: The sealing cover (8) is fixedly mounted to the sealing shell (2) via a plurality of mounting bolts, and the sealing cover (8) and the sealing shell (2) are sealed via a sealing strip.

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