Sealing device for launder chamber of vacuum induction melting furnace

By designing an annularly arranged inner and outer sealing structures in the vacuum induction melting furnace flow chamber and connecting the vacuum drainage pipeline, the problem of easy failure of the existing sealing devices is solved, and better sealing effect and stability of metal liquid are achieved.

CN223019380UActive Publication Date: 2025-06-24SHANGHAI WEIMAI TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202520735493.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-18
Publication Date
2025-06-24
Estimated Expiration
2035-04-18

AI Technical Summary

Technical Problem

The sealing device of the existing vacuum induction melting furnace flow chamber is prone to failure, resulting in contact with the atmospheric environment, resulting in temperature loss or changes in characteristics.

Method used

A ring-arranged inner and outer sealing structure is designed, and a vacuum evacuation pipeline is connected between the inner and outer sealing structures, a redundant sealing structure is added, and the inner sealing is maintained through the vacuum evacuation pipeline when the outer seal fails.

Benefits of technology

The sealing effect between the flow chamber cover and the flow chamber is effectively improved, and losses caused by sealing failure are avoided, ensuring that the temperature and characteristics of the metal liquid are maintained stable.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of metallurgy, and discloses a sealing device for a launder chamber of a vacuum induction melting furnace, which comprises a first annular fixing part, a second annular fixing part, a first elastic sealing part and a second elastic sealing part, wherein the first annular fixing part is formed on the lower bottom surface of a launder chamber cover or the top wall of the launder chamber in a surrounding manner; the second annular fixing part is formed on the lower bottom face of the launder chamber cover or the top wall of the launder chamber in a surrounding mode, located on the inner ring of the first annular fixing part and used for containing and fixing the second elastic sealing piece. The vacuumizing pipeline is connected between the first annular fixing part and the second annular fixing part and is used for extracting gas entering the space between the first annular fixing part and the second annular fixing part; the first radial reinforcing structure is vertically formed on the side wall, exposed out of the first annular fixing part, of the first elastic sealing piece; and the tops of the first elastic sealing piece and the second elastic sealing piece are in surface contact with the opponent piece. The technical problem that in the prior art, a sealing structure between the launder chamber cover and the launder chamber is prone to losing efficacy is solved, and sealing safety is improved through the redundant sealing structure.
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Description

Technical Field

[0001] The utility model relates to the metallurgy field, in particular to a sealing device for a runner chamber of a vacuum induction melting furnace. Background Art

[0002] At present, with the booming development of the steel industry, metallurgical equipment is also changing with each passing day. Therefore, metallurgical equipment is studying the performance and structure of induction furnace design from various aspects such as ergonomics, energy consumption engineering, and automation level.

[0003] The vacuum induction furnace is one of the important production equipment for the smelting of special steel. It is a vacuum smelting equipment that melts the base material by heating through a melting coil in a vacuum environment, and then pours the molten steel into the runner at a specific temperature through parameter setting. Then, the molten metal flows into a specific device through the nozzle. Finally, the required material is formed. In order to ensure the temperature and properties of the molten metal in the runner chamber, the runner chamber needs to be sealed to avoid the loss of temperature when the molten metal contacts the atmospheric environment, and also to avoid the change of the properties of the molten metal due to contact with oxygen in the atmospheric environment.

[0004] The existing technology seals the runner chamber cover and the runner chamber through a sealing ring. The runner chamber is in a negative pressure environment, and there is a possibility of sealing failure. Once the sealing between the runner chamber cover and the runner chamber fails, it will have an adverse impact on production. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the summary of the utility model. These simplified concepts are all simplified from the prior art in this field, which will be further described in detail in the specific implementation part. The summary of the utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] The technical problem to be solved by the utility model is to provide a sealing device for a runner chamber of a vacuum induction melting furnace with a better sealing effect compared to the prior art.

[0007] To solve the above technical problem, the sealing device for a runner chamber of a vacuum induction melting furnace provided by the utility model includes:

[0008] The first annular fixing part 1, which is formed around the lower bottom surface of the runner chamber cover or the top wall of the runner chamber, and is used for accommodating and fixing the first elastic sealing member 2;

[0009] The second annular fixing part 3, which is formed around the lower bottom surface of the runner chamber cover or the top wall of the runner chamber, and is located inside the inner circle of the first annular fixing part 1, and is used for accommodating and fixing the second elastic sealing member 4;

[0010] A vacuum pumping pipeline 5, which is connected between the first annular fixing part 1 and the second annular fixing part 3, and is used to pump out the gas entering between the first annular fixing part 1 and the second annular fixing part 3;

[0011] The first radial strengthening structure is vertically formed on the side wall of the first elastic seal 2 that exposes the first annular fixing part 1;

[0012] Wherein, the tops of the first elastic seal 2 and the second elastic seal 4 are in surface contact with their counterparts.

[0013] Further explanation, the first annular fixing part 1 and the second annular fixing part 3 can be arranged on the same component, such as both arranged on the bottom surface of the runner chamber cover, or can be respectively arranged on two counterparts. For example, the first annular fixing part 1 is arranged on the bottom surface of the runner chamber cover, and the second annular fixing part 3 is arranged on the top wall of the runner chamber.

[0014] Preferably, further improving the sealing device of the runner chamber of the vacuum induction melting furnace, when the first radial strengthening structure is formed between the first annular fixing part 1 and the second annular fixing part 3, a gap is formed between the first radial strengthening structure and the second elastic seal 4.

[0015] Preferably, further improving the sealing device of the runner chamber of the vacuum induction melting furnace, further includes:

[0016] The second radial strengthening structure is vertically formed on the side wall of the second elastic seal 4 that exposes the second annular fixing part 3.

[0017] Preferably, further improving the sealing device of the runner chamber of the vacuum induction melting furnace, the connection part of the first radial strengthening structure and the first elastic seal 2 is its root, and the end away from its root is the end part;

[0018] The connection part of the second radial strengthening structure and the second elastic seal 4 is its root, and the end away from its root is the end part;

[0019] The first radial strengthening structure is formed into a structure with a gradually increasing cross-sectional area from its end part to its root;

[0020] The second radial strengthening structure is formed into a structure with a gradually increasing cross-sectional area from its end part to its root.

[0021] Preferably, further improving the sealing device of the runner chamber of the vacuum induction melting furnace, the first annular fixing part 1 and the second annular fixing part 3 are grooves.

[0022] Preferably, further improving the sealing device of the runner chamber of the vacuum induction melting furnace, the first annular fixing part 1 and the second annular fixing part 3 are grooves with convex edges formed on both sides.

[0023] Preferably, further improve the sealing device of the runner chamber of the vacuum induction melting furnace, and the top surfaces of the first elastic seal 2 and the second elastic seal 4 are formed as sealing planes.

[0024] Preferably, further improve the sealing device of the runner chamber of the vacuum induction melting furnace, and further include: a pressure sensor, which is arranged between the first annular fixing part 1 and the second annular fixing part 3;

[0025] Wherein, the vacuum pumping pipeline 5 starts to pump vacuum only when receiving the trigger electric signal from the pressure sensor, and the pressure sensor emits a trigger electric signal when detecting that the pressure is non-vacuum.

[0026] In order to solve the technical problem that the sealing structure between the runner chamber cover and the runner chamber in the prior art is prone to failure, the present utility model designs an inner and outer two-layer sealing structure arranged in a ring shape and connects a vacuum pumping pipeline between the inner and outer two-layer sealing structures. Such a design not only increases the redundant sealing structure, but also avoids the impact of the atmospheric environment gas breaking through the outer sealing structure on the inner sealing structure after the outer sealing structure fails, and still can maintain the seal between the runner chamber cover and the runner chamber after the outer sealing structure fails, avoiding the losses caused by the seal failure. Description of the Drawings

[0027] The drawings of the present utility model are intended to show the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments according to the present utility model, and supplement the description in the specification. However, the drawings of the present utility model are schematic diagrams not drawn to scale, and thus may not be able to accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present utility model should not be construed as limiting or restricting the scope of the numerical values or properties covered by the exemplary embodiments according to the present utility model. The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0028] Figure 1 It is a top view schematic diagram of the present utility model.

[0029] Description of the Reference Numerals:

[0030] The first annular fixing part 1;

[0031] The first elastic seal 2;

[0032] The second annular fixing part 3;

[0033] The second elastic seal 4;

[0034] The vacuum pumping pipeline 5. Detailed Embodiments

[0035] The following describes the implementation modes of the present utility model through specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through different specific implementation modes. The details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without departing from the overall design concept of the utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present utility model can be implemented in many different forms and should not be construed as being limited only to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present utility model complete and thorough, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art. It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element can be directly connected or coupled to the other element, or there can be an intermediate element. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there is no intermediate element. In all the drawings, the same reference numerals always represent the same elements.

[0036] The first embodiment;

[0037] Refer to Figure 1 As shown, the present utility model provides a sealing device for the runner chamber of a vacuum induction melting furnace, including:

[0038] The first annular fixing part 1, which is formed around the lower bottom surface of the runner chamber cover or the top wall of the runner chamber, and is used for accommodating and fixing the first elastic seal 2;

[0039] The second annular fixing part 3, which is formed around the lower bottom surface of the runner chamber cover or the top wall of the runner chamber, and is located inside the inner circle of the first annular fixing part 1, and is used for accommodating and fixing the second elastic seal 4;

[0040] The vacuum pumping pipeline 5, which is connected between the first annular fixing part 1 and the second annular fixing part 3, and is used for pumping out the gas entering between the first annular fixing part 1 and the second annular fixing part 3;

[0041] The first radial strengthening structure, which is vertically formed on the side wall of the first elastic seal 2 exposed from the first annular fixing part 1;

[0042] Wherein, the tops of the first elastic seal 2 and the second elastic seal 4 form surface contact with their counterpart parts;

[0043] When the first annular fixing part 1 and the second annular fixing part 3 are formed on the bottom surface of the runner chamber cover, the counterpart parts of the first elastic seal 2 and the second elastic seal 4 are the runner chamber;

[0044] When the first annular fixing part 1 and the second annular fixing part 3 are formed on the top wall of the launder chamber, the counterparts of the first elastic seal 2 and the second elastic seal 4 are the launder chamber cover.

[0045] Preferably, further improving the above first embodiment, a first radial strengthening structure is added. When the first radial strengthening structure is formed between the first annular fixing part 1 and the second annular fixing part 3, a gap is formed between the first radial strengthening structure and the second elastic seal 4. If there is gas between the first elastic seal 2 and the second elastic seal 4, the gas will be evacuated by the evacuation pipeline. The purpose of this gap is to facilitate gas circulation.

[0046] The atmospheric environment is at positive pressure, and the pressure between the first elastic seal 2 and the second elastic seal 4 is less than the atmospheric environment. The first elastic seal 2 will be pushed towards the second elastic seal 4 by the pressure. When seal failure occurs, the first elastic seal 2 usually fails first. Therefore, it is necessary to strengthen the radial strength of the first elastic seal, thereby reducing the risk of failure of the first elastic seal.

[0047] Preferably, further improving the above first embodiment, it further includes:

[0048] A second radial strengthening structure, which is vertically formed on the side wall of the second elastic seal 4 where it exposes the second annular fixing part 3.

[0049] The principle of action of the second radial strengthening structure is the same as that of the first radial strengthening structure. The purpose of designing the second radial strengthening structure is to reduce the risk of failure of the second elastic seal.

[0050] The connection part of the first radial strengthening structure and the first elastic seal 2 is its root, and the end away from its root is the end;

[0051] The connection part of the second radial strengthening structure and the second elastic seal 4 is its root, and the end away from its root is the end;

[0052] The first radial strengthening structure is formed as a structure with a gradually increasing cross-sectional area from its end to its root;

[0053] The second radial strengthening structure is formed as a structure with a gradually increasing cross-sectional area from its end to its root.

[0054] The first radial strengthening structure and the second radial strengthening structure can be extended wings, protrusions, etc.

[0055] Optionally, the first annular fixing part 1 and the second annular fixing part 3 are grooves;

[0056] Alternatively, the first annular fixing portion 1 and the second annular fixing portion 3 are grooves formed with convex edges on both sides, and the height of the convex edges is lower than the height of the exposed portions of the first elastic seal and the second elastic seal. Designing the convex edges is beneficial to keeping the first elastic seal and the second elastic seal fixed and preventing the first elastic seal and the second elastic seal from detaching from the first annular fixing portion and the second annular fixing portion.

[0057] Optionally, the top surfaces of the first elastic seal 2 and the second elastic seal 4 are formed as sealing planes.

[0058] In addition, it should also be understood that although terms such as "first" and "second" can be used herein to describe different elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the exemplary embodiments of the present invention, the first element, component, region, layer, or part discussed below can also be referred to as the second element, component, region, layer, or part.

[0059] Second Embodiment;

[0060] Continue to refer to Figure 1 As shown, the second embodiment of the present invention is a further improvement based on the above first embodiment. The same parts will not be described in detail. It further includes:

[0061] A pressure sensor, which is arranged between the first annular fixing portion 1 and the second annular fixing portion 3;

[0062] Wherein, the vacuum pumping pipeline 5 starts to pump vacuum only when receiving the trigger electric signal of the pressure sensor, and the pressure sensor emits a trigger electric signal when detecting that the pressure is not vacuum.

[0063] The purpose of adding the pressure sensor is to reduce energy consumption. During use, the vacuum pumping pipeline can first perform vacuum pumping to form a vacuum environment between the inner and outer two-layer sealing structures (under the condition of effective sealing, this vacuum environment can be maintained without continuous vacuum pumping), and then stop the vacuum pumping work. Only when the pressure sensor detects that the pressure is greater than the preset threshold, it is determined that the outer sealing structure may fail, and the vacuum pumping pipeline is started to relieve the pressure borne by the inner sealing structure, thereby reducing the risk of inner sealing failure.

[0064] Unless otherwise defined, all terms (including technical and scientific terms) used herein shall have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. It will also be understood that terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and shall not be interpreted in an idealized or overly formal sense, unless expressly defined herein.

[0065] The above has described this utility model in detail through specific embodiments and examples, but these do not constitute a limitation to this utility model. Without departing from the principle of this utility model, those skilled in the art can also make many variations and improvements, which should also be regarded as the protection scope of this utility model.

Claims

1. A sealing device for a launder chamber of a vacuum induction melting furnace, characterized in that: include: A first annular fixing portion (1) is formed around the bottom surface of the flow channel chamber cover or the top wall of the flow channel chamber and is used to accommodate and fix the first elastic sealing member (2); A second annular fixing portion (3) is formed around the bottom surface of the flow channel chamber cover or the top wall of the flow channel chamber and is located inside the first annular fixing portion (1), and is used to accommodate and fix the second elastic sealing member (4); a vacuum extraction pipeline (5), which is connected between the first annular fixing portion (1) and the second annular fixing portion (3), and is used to extract gas entering between the first annular fixing portion (1) and the second annular fixing portion (3); A first radial reinforcement structure, which is vertically formed on a side wall of the first elastic sealing member (2) exposed from the first annular fixing portion (1); The tops of the first elastic sealing member (2) and the second elastic sealing member (4) are in surface contact with the counterpart.

2. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 1, characterized in that: When the first radial reinforcement structure is formed between the first annular fixing portion (1) and the second annular fixing portion (3), a gap is formed between the first radial reinforcement structure and the second elastic sealing member (4).

3. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 2, characterized in that: Also includes: A second radial reinforcement structure is formed vertically on a side wall of the second elastic sealing member (4) exposed from the second annular fixing portion (3).

4. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 3, characterized in that: The connection point between the first radial reinforcement structure and the first elastic sealing member (2) is the root thereof, and the end away from the root thereof is the end portion; The connection point between the second radial reinforcement structure and the second elastic sealing member (4) is the root thereof, and the end away from the root thereof is the end portion; The first radial reinforcement structure is formed into a structure with a cross-sectional area gradually increasing from its end portion to its root portion; The second radial reinforcement structure is formed into a structure with a cross-sectional area gradually increasing from its end portion toward its root portion.

5. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 1, characterized in that: The first annular fixing portion (1) and the second annular fixing portion (3) are grooves.

6. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 5, characterized in that: The first annular fixing portion (1) and the second annular fixing portion (3) are grooves with convex edges formed on both sides.

7. The sealing device for the launder chamber of a vacuum induction melting furnace according to claim 1, characterized in that: The top surfaces of the first elastic sealing member (2) and the second elastic sealing member (4) are formed into sealing planes.

8. The sealing device for the launder chamber of a vacuum induction melting furnace according to any one of claims 1 to 7, characterized in that: Also includes: A pressure sensor, which is arranged between the first annular fixing portion (1) and the second annular fixing portion (3); The vacuum pumping pipeline (5) starts vacuum pumping only when receiving a triggering electrical signal from the pressure sensor, and the pressure sensor sends a triggering electrical signal when detecting that the pressure is not a vacuum.