Structure of water-cooled transition cover of protective atmosphere electroslag furnace

Abstract

The utility model relates to special metallurgy field discloses a kind of water-cooling transition cover structure of protective atmosphere electroslag furnace, its main body is formed into tubular structure, comprising: transition cover top plate is formed in the main body upper mouth along place, the passage for electric slag is formed in its center;Transition cover upper winding board is located on transition cover top plate, can be rolled on top plate, it can be rolled to open the passage or the passage is shielded and is unfolded;Electric slag guide plate upper end connects main body inner side wall, its lower end is connected main body inner side wall by electric slag guide fixed plate, forms the flow guide structure that is gathered downwards, melt electric slag is gathered and guided main body lower mouth;Transition cover bottom plate removable cover is arranged in main body lower mouth;Transition cover water jacket covers main body side wall, and its transition cover water jacket inner layer is in contact with main body side wall;Water inlet is formed in transition cover water jacket outer layer lower part;Water outlet is formed in transition cover water jacket inner layer upper part.The utility model can realize transition cover water cooling cooling, while guaranteeing that electric slag is added operation is no electric slag, and guiding structure is stable.

Description

Technical Field

[0001] This utility model relates to the field of special metallurgy, and in particular to a protective atmosphere electroslag furnace water-cooled transition cover structure. Background Technology

[0002] Electroslag remelting, a key process in the deep processing of high-end specialty steels, effectively removes impurities from molten steel and optimizes its microstructure, making it an indispensable production step for improving the purity and overall quality of specialty steels. This process requires extremely high airtightness in the operating environment. Once the high-temperature molten steel comes into contact with the atmosphere, large amounts of hydrogen and oxygen from the air will dissolve into the molten steel. Excessive levels of these gaseous elements will cause internal white spot defects after the steel cools and solidifies, while also inducing hydrogen embrittlement, resulting in a significant reduction in the steel's toughness and strength, severely impacting product qualification rates and subsequent safety.

[0003] Both domestic and international metallurgical enterprises widely utilize protective atmosphere technology. This involves filling the smelting chamber with inert gases such as argon to create an oxygen-free, low-hydrogen, sealed environment, preventing air from contacting the molten steel. The transition hood, as an intermediate connecting component of the protective atmosphere electroslag furnace, is installed between the crystallizer and the lower fume hood and is the core carrier for constructing the sealed protective gas chamber. The rationality of its structural design directly affects the quality of gas isolation, the consumption of inert media, and is also a crucial factor in controlling the equipment investment and daily production costs of the entire production line.

[0004] The protective atmosphere electroslag remelting furnace transition hood currently used in mass production relies on sheet metal parts to form a complete hood, thereby maintaining the inert gas environment inside the cavity. A dedicated channel is set up to transport the protective gas, ensuring the stable operation of the slag feeding process. Because the transition hood is adjacent to the high-temperature slag pool, it continuously receives high-intensity heat radiation throughout the operation, making the operating conditions extremely harsh. When production conditions change, requiring the crystallizer to be raised to accommodate the production of large-sized steel ingots, the overall height of the transition hood must be increased accordingly. Traditional transition hoods are pure sheet metal structures; increasing the height significantly increases the heated area of ​​the hood, making it highly susceptible to thermal deformation under continuous high temperatures. This deformation can compress and damage the sealing components, causing seal failure, inert gas leakage, and ultimately disrupting the protective atmosphere in the smelting area. Simultaneously, the increased height alters the stress state of the guide plate support structure, significantly reducing its stability. Under long-term impact and friction from slag, the guide structure is prone to damage and detachment, leading to production failures such as slag leakage.

[0005] To address these two prominent issues, the industry currently lacks mature structural optimization solutions. Most approaches rely on adding temporary transition covers, which involves prefabricating multiple covers of varying heights and rotating them according to on-site conditions. While this method can temporarily meet production needs, the manufacturing and procurement of multiple sets directly increases equipment investment costs. The additional warehousing, transportation, and disassembly work also adds to the on-site maintenance burden. It only provides temporary respite from failures and cannot fundamentally solve the technical challenges of high-temperature deformation of the transition cover and the vulnerability of the guide structure. Utility Model Content

[0006] The utility model description section introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] This utility model aims to overcome the shortcomings of the existing technology and solve the problems of existing heightened transition covers being prone to high-temperature deformation and airtightness failure due to the lack of cooling structure, easy damage to the slag addition guide structure, and increased production costs due to the use of a backup transition cover. Without increasing the manufacturing difficulty and production cost, it achieves water cooling of the transition cover, while ensuring no slag leakage during slag addition and a stable guide structure.

[0008] To solve the above-mentioned technical problems, the protective atmosphere electroslag furnace water-cooled transition hood structure provided by this utility model has a main body formed as a tubular structure, including: The transition cover plate is formed at the upper edge of the main body, and a channel for the passage of power supply slag is formed in the center of the plate. The transition cover has a roll plate, which is located on the top plate of the transition cover and can be rolled up along the top plate of the transition cover. It can be rolled up to open the channel or unfolded to cover the channel. The electroslag guide plate has its upper end connected to the inner wall of the main body, and its lower end connected to the inner wall of the main body through the electroslag guide fixing plate, forming a downward converging guide structure that gathers the molten electroslag and guides it to the lower opening of the main body. The transition cover base plate has a removable cover located at the bottom of the main body; The transition cover water jacket covers the side wall of the main body, and the inner layer of the transition cover water jacket is in contact with the side wall of the main body. The inlet is located in the lower part of the outer layer of the transition cover water jacket; The outlet is formed on the upper part of the outer layer of the transition cover water jacket.

[0009] Optionally, further improvements to the protective atmosphere electroslag furnace water-cooled transition shroud structure may include: The inner retaining ring of the first sealing ring is formed between the top plate of the transition cover and the upper roll plate of the transition cover, and is used to fix the first sealing ring.

[0010] Optionally, further improvements to the protective atmosphere electroslag furnace water-cooled transition shroud structure may include: The second sealing ring inner retaining ring is formed between the top plate of the transition cover and the upper roll plate of the transition cover and is located outside the first sealing ring inner retaining ring, and is used to fix the second sealing ring.

[0011] Optionally, further improvements to the protective atmosphere electroslag furnace water-cooled transition shroud structure may include: The first reinforcing rib is formed on the inner layer of the transition cover water jacket along the direction of water flow.

[0012] Optionally, further improvements to the protective atmosphere electroslag furnace water-cooled transition shroud structure may include: The second reinforcing rib is formed on the outer layer of the transition cover water jacket.

[0013] Optionally, further improvements to the protective atmosphere electroslag furnace water-cooled transition shroud structure may include: A backflow preventer is placed between the inlet and outlet to restrict the backflow of cooling water from the outlet to the inlet.

[0014] Optionally, the structure of the protective atmosphere electroslag furnace water-cooled transition shroud can be further improved by including: the check valve is a backflow valve or a check ring.

[0015] Optionally, the structure of the protective atmosphere electroslag furnace water-cooled transition cover can be further improved by including: lifting lugs for hoisting the transition cover.

[0016] This utility model employs an inner and outer layer enclosing a sealed transition cover water jacket cavity, utilizing circulating cooling water to continuously remove the high-temperature heat radiation received by the transition cover, achieving overall cooling; mechanical reinforcement of the slag-adding guide plate by adding a fixing plate enhances the impact resistance of the guide structure; reinforcing ribs support the double-layer water jacket to prevent structural deformation caused by water pressure; and a partition ring is added inside the cavity to prevent cooling water from flowing back out of the inlet, optimizing the water-cooled heat exchange effect.

[0017] This utility model can achieve at least the following technical effects compared to the prior art; 1) Existing technology lacks a water-cooling structure. After being heightened, it will inevitably deform under high-temperature radiation, and the airtightness cannot be guaranteed in the long term. This defect cannot be avoided.

[0018] This invention features an independent water-cooled cavity, where circulating cooling water can continuously remove high-temperature heat. Even if the transition cover is heightened, it will not deform due to high temperatures, effectively maintaining the overall airtightness of the transition cover.

[0019] 2) The existing electroslag guide plate has no reinforcement structure. After being raised, its stability will be further reduced, and it will be prone to damage and slag leakage after long-term use.

[0020] This utility model adds an electroslag guide fixing plate to reinforce the guide plate, which can withstand long-term electroslag impact and will not fall off, thus completely avoiding the problem of slag leakage.

[0021] 3) Traditional solutions rely on backup transition covers to cope with changes in crystallizer operating conditions at different heights, which requires continuous increases in production input.

[0022] The protective atmosphere electroslag furnace of this invention does not require multiple sets of spare transition covers. It can meet the needs of crystallizers of different heights by simply using a single protective atmosphere electroslag furnace water-cooled transition cover structure to be hoisted to different installation heights by lifting lugs, thereby reducing the cost of equipment procurement, storage and replacement.

[0023] 4) The present invention sets a reinforcing rib between the double water jackets to resist the cooling water pressure and prevent the water jacket from bulging and failing; the internal partition ring of the cavity optimizes the water flow direction, making the overall cooling of the transition cover more uniform and extending the overall service life of the equipment.

[0024] 5) This utility model adds water cooling and reinforcement structures to the original transition cover structure, and uses traditional processing technology without increasing manufacturing steps or processing difficulty, so it can be mass-produced and applied. Attached Figure Description

[0025] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the present invention, supplementing the description in the specification. However, these drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by the exemplary embodiments of the present invention. The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a cross-sectional schematic diagram of the present invention.

[0026] Explanation of reference numerals in the attached figures Transition cover top plate 1; Transition cover upper roll plate 2; Electroslag guide plate 3; Electroslag Guide Fixing Plate 4 The inner retaining ring 5 of the first sealing ring Second sealing ring inner retaining ring 6; Hanging lug 7; Transition cover bottom plate 8; 9. Inner layer of the transition cover water jacket; Transition cover water jacket outer layer 10; Inlet 11; Outlet 12; Backstop 13. Detailed Implementation

[0027] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can fully understand other advantages and technical effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through different specific embodiments, and various details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. The following exemplary embodiments of this utility model can be implemented in many different forms and should not be construed as limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of this utility model thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art. It should be understood that when an element is referred to as "connected" or "combined" to another element, the element can be directly connected or combined to the other element, or there may be intermediate elements. The difference is that when an element is referred to as "directly connected" or "directly combined" to another element, there are no intermediate elements. Throughout the drawings, the same reference numerals always denote the same elements. As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0028] First embodiment; refer to Figure 1 As shown, the protective atmosphere electroslag furnace water-cooled transition hood structure of this utility model has a main body formed as a tubular structure, including: The transition cover plate 1 is formed at the upper edge of the main body, and a channel for the passage of power supply slag is formed in the center of the plate; The transition cover has a roll plate 2, which is located on the top plate 1 of the transition cover and can be rolled up along the top plate 1 of the transition cover. It can be rolled up to open the channel or unfolded to cover the channel. The electroslag guide plate 3 has its upper end connected to the inner wall of the main body, and its lower end connected to the inner wall of the main body through the electroslag guide fixing plate 4, forming a downward converging flow guiding structure that gathers the molten electroslag and guides it to the lower opening of the main body. The transition cover bottom plate 8 has a removable cover located at the bottom of the main body; The transition cover water jacket covers the side wall of the main body, and the inner layer 9 of the transition cover water jacket is in contact with the side wall of the main body. The inlet 11 is formed at the lower part of the outer layer 10 of the transition cover water jacket; The outlet 12 is formed on the upper part of the outer layer 10 of the transition cover water jacket.

[0029] Second embodiment; Continue to refer to Figure 1 As shown, the second embodiment of this utility model is a further improvement based on the first embodiment described above. The identical parts will not be repeated here, and it also includes: The inner retaining ring 5 of the first sealing ring is formed between the top plate 1 of the transition cover and the upper roll plate 2 of the transition cover, and is used to fix the first sealing ring.

[0030] Third embodiment; Continue to refer to Figure 1 As shown, the third embodiment of this utility model is a further improvement based on the second embodiment described above. The identical parts will not be repeated here, and it also includes: The second sealing ring inner retaining ring 6 is formed between the top plate 1 of the transition cover and the upper roll plate 2 of the transition cover and is located outside the first sealing ring inner retaining ring 5. It is used to fix the second sealing ring.

[0031] Fourth embodiment; Continue to refer to Figure 1 As shown, the fourth embodiment of this utility model is a further improvement based on the third embodiment described above. The identical parts will not be repeated here, and it also includes: The backflow preventer 13, which is a backflow valve or a backflow preventer ring, is arranged between the inlet 11 and the outlet 12. It is used to prevent cooling water from flowing back from the outlet to the inlet 11.

[0032] Alternatively, the first to fourth embodiments described above can be further improved by including: The first reinforcing rib is formed along the direction of water flow on the inner layer 9 of the transition cover water jacket.

[0033] Alternatively, the first to fourth embodiments described above can be further improved by including: The first reinforcing rib is formed on the inner layer 9 of the transition cover water jacket along the water flow direction; The second reinforcing rib is formed on the outer layer 10 of the transition cover water jacket.

[0034] Optionally, the first to fourth embodiments described above can be further improved by including: a lifting lug 7, which is used for lifting the transition cover.

[0035] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will also be understood that, unless explicitly defined herein, terms such as those defined in a general dictionary shall be interpreted as having the meaning consistent with their meaning in the relevant field context, and not as having an idealized or overly formal meaning.

[0036] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A protective atmosphere electroslag furnace water-cooled transition hood structure, the main body of which is formed as a tubular structure, characterized in that, include: The transition cover plate (1) is formed at the upper edge of the main body, and a channel for the passage of power supply slag is formed in the center of the plate; The transition cover has a roll plate (2), which is located on the top plate (1) of the transition cover and can be rolled along the top plate (1) of the transition cover. It can be rolled up to open the channel or unfolded to cover the channel. The electroslag guide plate (3) is connected to the inner wall of the main body at its upper end and to the inner wall of the main body at its lower end through the electroslag guide fixing plate (4), forming a downward converging guide structure to gather the molten electroslag and guide it to the lower opening of the main body. The transition cover bottom plate (8) has a removable cover at the bottom of the main body; The transition cover water jacket covers the main body sidewall, and the inner layer (9) of the transition cover water jacket is in contact with the main body sidewall; The inlet (11) is formed at the lower part of the outer layer (10) of the transition cover water jacket; The outlet (12) is formed on the upper part of the outer layer (10) of the transition cover water jacket.

2. The protective atmosphere electroslag furnace water-cooled transition shroud structure as described in claim 1, characterized in that, Also includes: The first sealing ring inner retaining ring (5) is formed between the top plate (1) of the transition cover and the upper roll plate (2) of the transition cover, and is used to fix the first sealing ring.

3. The protective atmosphere electroslag furnace water-cooled transition hood structure as described in claim 2, characterized in that, Also includes: The second sealing ring inner retaining ring (6) is formed between the top plate (1) of the transition cover and the upper roll plate (2) of the transition cover and is located outside the first sealing ring inner retaining ring (5), and is used to fix the second sealing ring.

4. The protective atmosphere electroslag furnace water-cooled transition shroud structure as described in claim 1, characterized in that, Also includes: The first reinforcing rib is formed on the inner layer (9) of the transition cover water jacket along the direction of water flow.

5. The protective atmosphere electroslag furnace water-cooled transition hood structure as described in claim 1, characterized in that, Also includes: The second reinforcing rib is formed on the outer layer (10) of the transition cover water jacket.

6. The protective atmosphere electroslag furnace water-cooled transition hood structure as described in any one of claims 1-5, characterized in that, Also includes: A backflow preventer (13) is arranged between the inlet (11) and the outlet (12) to restrict the backflow of cooling water from the outlet to the inlet (11).

7. The protective atmosphere electroslag furnace water-cooled transition cover structure as described in claim 6, characterized in that, Also includes: The check valve (13) is a backflow valve or a check ring.

8. The protective atmosphere electroslag furnace water-cooled transition hood structure as described in any one of claims 1-5, characterized in that, Also includes: Lifting lug (7), which is used for lifting the transition cover.

Images