A protection device for the bottom of a vacuum tank of an RH furnace

Abstract

The utility model discloses a kind of RH furnace vacuum tank bottom protection devices, comprising: vacuum tank and molten steel tank of vacuum tank bottom;Gas delivery pipe is provided in vacuum tank, and gas delivery pipe bottom is provided with metal hose;Vacuum tank bottom is provided with ascending immersion pipe and descending immersion pipe, and ascending immersion pipe and descending immersion pipe are communicated with gas delivery pipe by metal hose respectively;Vacuum tank bottom is provided with splash-proof component.This protection device can effectively prevent molten steel from being directly splashed on metal hose, reduce the probability of damage of metal hose due to high temperature and impact of molten steel, reduce downtime caused by replacing metal hose;And it can also avoid deformation of vacuum tank bottom due to high temperature, make the structure of vacuum tank bottom more stable, ensure the normal use and structural integrity of vacuum tank, reduce equipment repair and replacement cost caused by deformation of vacuum tank bottom, meet the production and use requirements of RH furnace vacuum tank.

Description

Technical Field

[0001] This utility model belongs to the field of iron and steel smelting technology, specifically a bottom protection device for the vacuum tank of an RH furnace. Background Technology

[0002] A RH furnace, or vacuum circulating degassing refining furnace, is a secondary refining device widely used in the iron and steel metallurgy industry. It is primarily used to refine molten steel to improve its quality. During vacuum evacuation in the RH furnace's vacuum tank, the rising and falling immersion pipes at the bottom of the tank are inserted into the molten steel in the ladle. The atmospheric pressure on the surface of the molten steel forces it to flow from the rising immersion pipes into the vacuum tank under vacuum. As the molten steel circulates, gases such as argon, hydrogen, and carbon monoxide are drawn away. Simultaneously, the molten steel undergoes a series of metallurgical reactions, such as the carbon-oxygen reaction. The molten steel then flows back into the ladle through the falling immersion pipes, continuously circulating and thus purifying the molten steel.

[0003] Chinese patent CN215251001U discloses an anti-clogging device for the air blowing hole of an RH furnace impregnation tube, which can ensure the circulation effect during the life of the impregnation tube and prevent the impregnation tube from being taken off the production line due to clogging. Currently, the impregnation tube at the bottom of the vacuum tank is connected to the rigid gas delivery pipe of the vacuum tank through a metal hose, which makes it easier to disassemble and assemble when replacing the impregnation tube. However, during the production process, the metal hose is close to the molten steel in the ladle. When the molten steel reacts violently during production, it is easy to splash, which makes the bottom of the vacuum tank and the metal hose prone to heat deformation or damage, causing production to stop for replacement or maintenance, which seriously affects production efficiency.

[0004] Therefore, there is an urgent need for a bottom protection device for the vacuum tank of an RH furnace to reduce the possibility of deformation or damage to the bottom of the vacuum tank and the metal hose due to high temperature, so as to meet the production and use requirements and work efficiency of the vacuum tank of the RH furnace. Utility Model Content

[0005] The purpose of this utility model is to provide a bottom protection device for the vacuum tank of an RH furnace, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A bottom protection device for a vacuum tank in an RH furnace, comprising: Vacuum tank and molten steel tank at the bottom of the vacuum tank; A gas delivery pipe is installed inside the vacuum chamber, and a flexible metal hose is installed at the bottom of the gas delivery pipe; The bottom of the vacuum tank is provided with an ascending impregnation pipe and a descending impregnation pipe, which are respectively connected to the gas delivery pipe through the metal flexible tube. The bottom of the vacuum tank is equipped with a splash-proof component.

[0007] The bottom protection device for the vacuum tank of the RH furnace according to the present invention has at least the following technical effects: The bottom protection device for the RH furnace vacuum trough, by installing anti-splash components at the bottom of the vacuum trough, acts as a barrier for the bottom of the vacuum trough and the metal hose, effectively preventing molten steel from splashing directly onto the metal hose. This reduces the probability of damage to the metal hose due to the high temperature and impact of the molten steel, extends the service life of the metal hose, and reduces downtime caused by replacing the metal hose. Furthermore, it prevents deformation of the vacuum trough bottom due to high temperature, making the bottom structure of the vacuum trough more stable, ensuring the normal use and structural integrity of the vacuum trough, reducing equipment maintenance and replacement costs caused by deformation of the vacuum trough bottom, and meeting the production and operation requirements and efficiency of the RH furnace vacuum trough.

[0008] As a further embodiment of this utility model: the anti-splashing component includes a baffle plate, the baffle plate is connected to the bottom of the vacuum tank, and the rising immersion pipe and the descending immersion pipe respectively pass through the baffle plate and communicate with the molten steel tank.

[0009] Because the anti-splash assembly includes a baffle connected to the bottom of the vacuum tank, and the rising and falling immersion pipes are respectively connected to the molten steel ladle through the baffle; the baffle can effectively prevent molten steel from splashing directly onto the metal hose when it reacts violently, reducing the possibility of damage to the metal hose, reducing the frequency of replacement due to hose damage, and improving the service life of the metal hose; in addition, the baffle can reduce the direct impact and high temperature effect of molten steel splash on the bottom of the vacuum tank, preventing deformation or damage to the bottom of the vacuum tank, ensuring the stability and integrity of the bottom structure of the vacuum tank, extending the overall service life of the vacuum tank, and thus ensuring production efficiency.

[0010] As a further improvement of this utility model, the top and bottom of the baffle are respectively provided with fire-resistant coatings.

[0011] By applying refractory coatings to the top and bottom of the baffle, the refractory coatings have good high-temperature resistance properties and can slowly transfer heat to the baffle, effectively reducing the rate of heat transfer from molten steel to the baffle. This prevents the baffle from expanding, twisting, or even cracking due to instantaneous high temperature, ensuring the performance and lifespan of the baffle, thereby preventing deformation or damage to the bottom of the vacuum tank and ensuring the stability and integrity of the bottom structure of the vacuum tank.

[0012] As a further embodiment of this utility model: rivets are provided at the top and bottom of the baffle, and the baffle is connected to the bottom of the vacuum tank through the rivets at its top.

[0013] Because rivets are also installed at the top and bottom of the baffle, the baffle is connected to the bottom of the vacuum tank through the rivets at the top. The rivets can further fix the refractory coating, prevent the refractory coating from loosening or falling off, and enhance the adhesion stability of the refractory coating. At the same time, the connection between the rivets at the top of the baffle and the bottom of the vacuum tank can effectively enhance the structural stability and strength of the baffle, and further improve the reliability of the entire protective device.

[0014] As a further embodiment of this invention, the anti-splash assembly further includes a sleeve, which is wrapped around the outside of the metal hose.

[0015] As a further improvement of this utility model, the sleeve is made of ceramic or carbon fiber.

[0016] Since the anti-splash assembly also includes a sleeve, which is wrapped around the outside of the metal hose, and the sleeve is made of ceramic or carbon fiber, both of which have good thermal insulation properties, it can effectively reduce the heat transfer from the external high temperature to the metal hose, keeping the metal hose in a relatively low temperature environment, preventing the metal hose from aging faster due to excessive temperature, and ensuring the performance and life of the metal hose.

[0017] As a further embodiment of this utility model: a protective box is provided at the bottom of the vacuum tank, and the bottom of the protective box is connected to the top of the baffle.

[0018] As a further embodiment of this utility model: the metal flexible tube passes through the protective box, and the protective box is filled with a fire-resistant layer.

[0019] Because a protective box is installed at the bottom of the vacuum tank, and the bottom of the protective box is connected to the top of the baffle; the metal hose is installed in the protective box, and the protective box is filled with a fire-resistant layer; the protective box can effectively block the transmission of high temperature to the metal hose, and the fire-resistant layer can absorb and disperse heat, keeping the temperature around the metal hose within a safe range, avoiding damage to the metal hose due to high temperature, ensuring the service life and performance of the metal hose, and further improving the protective effect of the metal hose.

[0020] As a further improvement of this utility model, the protective box is made of stainless steel and has a thickness of 4mm-6mm.

[0021] In the working environment of an RH furnace, there are various corrosive substances, such as high-temperature molten steel and corrosive gases generated inside the furnace. By selecting stainless steel for the protective box, it can resist the erosion of these chemicals and prevent the protective box from being damaged by corrosion. Moreover, the thickness of the protective box is 4mm-6mm, which can provide sufficient strength to withstand the impact of molten steel splashes and external mechanical damage, ensuring that the protective box can still function stably under long-term high-temperature working conditions and provide continuous and reliable protection for the internal metal hoses.

[0022] As a further improvement of this utility model, the thickness of the baffle is 8mm-12mm.

[0023] With a thickness of 8mm-12mm, the baffle can withstand the impact force generated when molten steel splashes, preventing excessive local stress from causing breakage and avoiding damage to downstream equipment caused by molten steel penetrating the baffle. This ensures the normal performance of key components such as metal hoses. Furthermore, it increases the heat transfer path and resistance, effectively reducing heat conduction and mitigating the impact of high temperatures on the bottom of the vacuum tank and components such as metal hoses, thereby improving the stability and reliability of the equipment. Attached Figure Description

[0024] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of a bottom protection device for a vacuum tank in an RH furnace. Figure 2 for Figure 1 A schematic diagram of the side view structure; Figure 3 for Figure 1 A magnified view of part A.

[0026] Figure label: 1. Vacuum tank; 101. Gas delivery pipe; 102. Metal hose; 103. Rising immersion pipe; 104. Falling immersion pipe; 2. Molten steel tank; 3. Anti-splash assembly; 301. Baffle; 302. Sleeve; 303. Protective box. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] like Figure 1-3 The present invention, as shown in this embodiment, provides a bottom protection device for a vacuum tank in an RH furnace, comprising: a vacuum tank 1 and a molten steel tank 2 at the bottom of the vacuum tank 1; a gas delivery pipe 101 is provided inside the vacuum tank 1, and a metal hose 102 is provided at the bottom of the gas delivery pipe 101; an ascending immersion pipe 103 and a descending immersion pipe 104 are provided at the bottom of the vacuum tank 1, and the ascending immersion pipe 103 and the descending immersion pipe 104 are respectively connected to the gas delivery pipe 101 through the metal hose 102; and an anti-splashing component 3 is provided at the bottom of the vacuum tank 1.

[0034] Specifically, the bottom protection device of the RH furnace vacuum tank, by setting an anti-splash component 3 at the bottom of the vacuum tank 1, can act as a barrier for the bottom of the vacuum tank 1 and the metal hose 102, effectively preventing molten steel from splashing directly onto the metal hose 102, reducing the probability of damage to the metal hose 102 due to the high temperature and impact of molten steel, extending the service life of the metal hose 102, and reducing downtime caused by replacing the metal hose 102; it can also prevent the bottom of the vacuum tank 1 from deforming due to high temperature, making the bottom structure of the vacuum tank 1 more stable, ensuring the normal use and structural integrity of the vacuum tank 1, reducing the equipment maintenance and replacement costs caused by the deformation of the bottom of the vacuum tank 1, and meeting the production and use requirements of the RH furnace vacuum tank.

[0035] Furthermore, such as Figure 3 As shown, the anti-splash assembly 3 includes a baffle 301, which is connected to the bottom of the vacuum tank 1. The rising immersion pipe 103 and the descending immersion pipe 104 pass through the baffle 301 and are connected to the molten steel tank 2.

[0036] Specifically, the anti-splash assembly 3 includes a baffle 301, which is connected to the bottom of the vacuum tank 1. The rising immersion pipe 103 and the descending immersion pipe 104 pass through the baffle 301 and are connected to the molten steel ladle 2. The baffle 301 can effectively prevent the molten steel from splashing directly onto the metal hose 102 when it reacts violently, reducing the possibility of damage to the metal hose 102 and the frequency of replacement due to damage, thus improving the service life of the metal hose 102. Furthermore, the baffle 301 can reduce the direct impact and high temperature effect of molten steel splash on the bottom of the vacuum tank 1, preventing deformation or damage to the bottom of the vacuum tank 1, ensuring the stability and integrity of the bottom structure of the vacuum tank 1, extending the overall service life of the vacuum tank 1, and thus ensuring production efficiency.

[0037] Furthermore, the top and bottom of the baffle 301 are respectively provided with fire-resistant coatings.

[0038] Specifically, by setting refractory coatings on the top and bottom of the baffle 301, the refractory coatings have good high-temperature resistance properties and can slowly transfer heat to the baffle 301, effectively reducing the heat transfer rate from molten steel to the baffle 301, preventing the baffle 301 from expanding, twisting or even cracking due to instantaneous high temperature, ensuring the performance and life of the baffle 301, thereby preventing deformation or damage to the bottom of the vacuum tank 1, and ensuring the stability and integrity of the bottom structure of the vacuum tank 1.

[0039] Furthermore, rivets are provided at the top and bottom of the baffle 301, and the baffle 301 is connected to the bottom of the vacuum tank 1 through the rivets at its top.

[0040] Specifically, since rivets are provided at the top and bottom of the baffle 301, the baffle 301 is connected to the bottom of the vacuum tank 1 through the rivets at its top. The rivets can further fix the refractory coating, prevent the refractory coating from loosening or falling off, and enhance the adhesion stability of the refractory coating. At the same time, the connection between the rivets at the top of the baffle 301 and the bottom of the vacuum tank can effectively enhance the structural stability and strength of the baffle 301, and further improve the reliability of the entire protective device.

[0041] Furthermore, such as Figure 3 As shown, the splash guard assembly 3 also includes a sleeve 302, which is wrapped around the outside of the metal hose 102. The sleeve 302 is made of ceramic or carbon fiber.

[0042] Specifically, the anti-splash assembly 3 also includes a sleeve 302, which is wrapped around the outside of the metal hose 102. The sleeve 302 is made of ceramic or carbon fiber. Both ceramic and carbon fiber materials have good heat insulation properties, which can effectively reduce the heat transfer from the external high temperature to the metal hose 102, so that the metal hose 102 is in a relatively low temperature environment, preventing the metal hose 102 from aging faster due to excessive temperature, and ensuring the performance and life of the metal hose 102.

[0043] According to an embodiment of the present invention, a protective box 303 is provided at the bottom of the vacuum tank 1, and the bottom of the protective box 303 is connected to the top of the baffle 301; a metal hose 102 is provided in the protective box 303, and the protective box 303 is filled with a fire-resistant layer.

[0044] Specifically, a protective box 303 is installed at the bottom of the vacuum tank 1, and the bottom of the protective box 303 is connected to the top of the baffle 301; the metal hose 102 is installed in the protective box 303, and the protective box 303 is filled with a fire-resistant layer; the protective box 303 can effectively block the transmission of high temperature to the metal hose 102, and the fire-resistant layer can absorb and disperse heat, keeping the temperature around the metal hose 102 within a safe range, avoiding damage to the metal hose 102 due to high temperature, ensuring the service life and performance of the metal hose 102, and further improving the protective effect of the metal hose 102.

[0045] Furthermore, the protective box 303 is made of stainless steel, and its thickness is 4mm-6mm.

[0046] Specifically, in the working environment of an RH furnace, there are various corrosive substances, such as high-temperature molten steel and corrosive gases generated inside the furnace. By selecting stainless steel for the protective box 303, it can resist the erosion of these chemical substances and prevent the protective box 303 from being damaged due to corrosion. Moreover, the thickness of the protective box 303 is 4mm-6mm, which can provide sufficient strength to resist the impact of molten steel splashes and external mechanical damage, ensuring that the protective box 303 can still function stably under long-term high-temperature working conditions, and providing continuous and reliable protection for the internal metal hose 102.

[0047] It should also be noted that the thickness of baffle 301 is 8mm-12mm.

[0048] Specifically, since the thickness of the baffle 301 is 8mm-12mm, it can withstand the impact force generated when molten steel splashes, prevent excessive local stress from causing cracking, avoid molten steel penetrating the baffle 301 and causing damage to the equipment behind it, and ensure the normal performance of key components such as the metal hose 102; it can also increase the heat transfer path and resistance, effectively reduce heat conduction, reduce the impact of high temperature on the bottom of the vacuum tank 1 and components such as the metal hose 102, and improve the stability and reliability of the equipment.

[0049] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A bottom protection device for a vacuum tank in an RH furnace, characterized in that, include: Vacuum tank (1) and molten steel tank (2) at the bottom of the vacuum tank (1); A gas delivery pipe (101) is provided inside the vacuum tank (1), and a metal flexible tube (102) is provided at the bottom of the gas delivery pipe (101). The bottom of the vacuum tank (1) is provided with an upward impregnation pipe (103) and a downward impregnation pipe (104), and the upward impregnation pipe (103) and the downward impregnation pipe (104) are respectively connected to the gas delivery pipe (101) through the metal hose (102); The bottom of the vacuum tank (1) is provided with an anti-splashing component (3).

2. The bottom protection device for the vacuum tank of the RH furnace according to claim 1, characterized in that, The anti-splash assembly (3) includes a baffle (301), which is connected to the bottom of the vacuum tank (1). The rising immersion pipe (103) and the descending immersion pipe (104) pass through the baffle (301) and are connected to the molten steel tank (2).

3. The bottom protection device for the vacuum tank of the RH furnace according to claim 2, characterized in that, The top and bottom of the baffle (301) are respectively provided with fire-resistant coatings.

4. The bottom protection device for the vacuum tank of the RH furnace according to claim 3, characterized in that, The baffle (301) is also provided with rivets at the top and bottom, and the baffle (301) is connected to the bottom of the vacuum groove (1) by the rivets at its top.

5. The bottom protection device for the vacuum tank of the RH furnace according to claim 4, characterized in that, The splash guard assembly (3) also includes a sleeve (302) which is wrapped around the outside of the metal hose (102).

6. The bottom protection device for the vacuum tank of the RH furnace according to claim 5, characterized in that, The sleeve (302) is made of ceramic or carbon fiber.

7. The bottom protection device for the vacuum tank of an RH furnace according to claim 6, characterized in that, The bottom of the vacuum tank (1) is provided with a protective box (303), and the bottom of the protective box (303) is connected to the top of the baffle (301).

8. The bottom protection device for the vacuum tank of the RH furnace according to claim 7, characterized in that, The metal flexible hose (102) passes through the protective box (303), and the protective box (303) is filled with a fire-resistant layer.

9. The bottom protection device for the vacuum tank of an RH furnace according to claim 8, characterized in that, The protective box (303) is made of stainless steel and the thickness of the protective box (303) is 4mm-6mm.

10. The RH furnace vacuum tank bottom protection device according to any one of claims 2 to 9, characterized in that, The thickness of the baffle (301) is 8mm-12mm.

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