Converter high-position reblowing device

Abstract

The utility model relates to the related technical field of converter high-position reblowing, and one embodiment of the utility model provides a converter high-position reblowing device which comprises a supporting frame and a protective cover, the protective cover is arranged in the supporting frame, a height adjusting assembly is arranged between the supporting frame and the protective cover, a reblowing assembly is arranged in the protective cover, and the reblowing assembly comprises a movable frame; the movable frame is movably connected into the protective cover in a sleeved mode, an air cavity is formed in the movable frame, an air pipe is arranged on one side of the movable frame and communicated with the interior of the air cavity, a plurality of nozzles are arranged on the side surface of the movable frame and communicated with the air cavity, a circulating cavity is formed in the movable frame, and a pair of circulating pipelines are arranged on the side end face of the movable frame. By means of the technical scheme, the technical problems that in the prior art, a high-position reblowing device of a converter generally has the defects of insufficient nozzle cooling protection and inconvenient height adjustment, the service life of a nozzle is short, and the adaptability of the reblowing process is poor are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of high-level supplementary blowing in converters, specifically, to a high-level supplementary blowing device for converters. Background Technology

[0002] In the iron and steel metallurgy industry, the high-level supplementary blowing process in converter steelmaking is a key step in optimizing in-furnace reactions and improving steel quality. Its core lies in injecting gas into the furnace through high-level nozzles to regulate the metallurgical reaction. However, traditional high-level supplementary blowing devices for converters generally suffer from insufficient nozzle cooling protection and inconvenient height adjustment, resulting in short nozzle lifespan and poor adaptability to the supplementary blowing process, severely restricting the efficiency and cost control of converter steelmaking.

[0003] Existing supplementary blowing systems suffer from significant structural defects: Firstly, the nozzle cooling system is rudimentary, often employing a single-channel water-cooling structure. The cooling water flow and pressure cannot be dynamically adjusted according to the nozzle temperature. Under high-load blowing conditions, the nozzle head softens due to insufficient heat dissipation, potentially leading to nozzle melting and leakage, affecting furnace reaction safety. In steel plant converters using traditional supplementary blowing systems, insufficient nozzle cooling necessitates nozzle replacement per heat, increasing refractory material consumption and extending the smelting cycle. Secondly, the height adjustment of the supplementary blowing system relies on manual operation of a screw-nut mechanism, resulting in low precision and time-consuming labor. Facing different furnace types or smelting stages, it cannot quickly adjust the nozzle to the optimal blowing height, leading to insufficient gas jet penetration or impact on the furnace wall, affecting decarburization efficiency and furnace lining life. Furthermore, traditional systems have low integration between the nozzle and cooling system, making cooling water channels prone to scaling and blockage. The lack of an online nozzle temperature monitoring design prevents early warning of cooling failure risks.

[0004] As converter steelmaking evolves towards higher efficiency and greater intelligence, traditional supplementary blowing devices, due to drawbacks such as inefficient cooling protection and lagging height adjustment, can no longer meet the demands of modern metallurgical processes for long-life nozzles and precise height control. For example, in ultra-low carbon steel smelting, nozzle height and cooling intensity need to be adjusted in real time according to the decarburization rate. Traditional devices, due to untimely adjustments, cause fluctuations in the carbon content of the molten steel, leading to a decrease in the pass rate. There is an urgent need to develop a new type of high-level supplementary blowing device with dynamic cooling control and automatic height adjustment functions to solve the industry problems of short nozzle life and poor process adaptability, and to promote the upgrading of converter steelmaking towards refinement and intelligence. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a converter high-level supplementary blowing device, which solves the technical problems of insufficient nozzle cooling protection and inconvenient height adjustment in conventional converter high-level supplementary blowing devices, resulting in short nozzle life and poor adaptability to supplementary blowing process.

[0006] According to one aspect, at least one embodiment of this disclosure provides a converter high-level supplementary blowing device, comprising:

[0007] A support frame and a protective cover, wherein the protective cover is disposed within the support frame;

[0008] A height adjustment assembly is disposed between the support frame and the protective cover;

[0009] A supplementary blowing assembly, wherein the supplementary blowing assembly is disposed within the protective cover;

[0010] The supplementary blowing assembly includes a movable frame, which is movably connected to the inside of the protective cover. An air chamber is opened inside the movable frame. An air pipe is provided on one side of the movable frame and is connected to the inside of the air chamber. Several nozzles are provided on the side surface of the movable frame and are connected to the air chamber.

[0011] As a further technical solution, the mobile frame has a circulation chamber inside, and a pair of circulation pipes are provided on the side end face of the mobile frame. The circulation pipes are connected to the inside of the circulation chamber. The circulation chamber surrounds the outside of the air chamber. A heat insulation cover is provided on the side end face of the mobile frame, and several nozzles are located inside the heat insulation cover.

[0012] As a further technical solution, the top of the protective cover is provided with an opening, the top of the movable frame is provided with a rack, the top of the protective cover is provided with a control motor, the output end of the control motor is provided with a drive gear, and the drive gear meshes with the rack.

[0013] As a further technical solution, the height adjustment component includes a pair of transmission grooves, which are formed on both end faces of the support frame. A pair of slide rails are provided in the transmission grooves, and the protective cover is slidably connected to the slide rails.

[0014] As a further technical solution, the top of the transmission groove is an open structure, the top of the support frame is rotatably connected to a transmission shaft, a pair of limiting plates are provided at both ends of the transmission shaft, and a pair of steel cables are connected between the transmission shaft and the protective cover.

[0015] As a further technical solution, the steel cable is located between a pair of limiting plates, a drive motor is provided on the top of the support frame, and a transmission gear is provided on both the output end of the drive motor and the transmission shaft, and the transmission gears mesh with each other.

[0016] As a further technical solution, a pair of stabilizing bases are provided at the lower ends of both sides of the support frame, and several fixing holes are opened on the surface of the stabilizing bases.

[0017] As a further technical solution, both of the transmission gears are bevel gears with 90° transmission.

[0018] The beneficial effects of the embodiments disclosed herein are as follows:

[0019] 1. In this disclosure, the supplementary blowing assembly uses the design of the circulating chamber inside the moving frame surrounding the air chamber, and is connected to the external cooling system through the circulating pipe to form an efficient cooling circuit, which continuously cools the air chamber and nozzles to avoid high-temperature damage. The heat insulation cover is made of multi-layer ceramic fiber material to block the high temperature of the converter and protect the nozzles. The control motor drives the moving frame to move horizontally through the drive gear and rack, and accurately adjusts the blowing position, which solves the problems of insufficient cooling and inconvenient adjustment of the blowing position in traditional devices, and ensures stable supplementary blowing operation.

[0020] 2. In this disclosure, the height adjustment component utilizes the cooperation between the double slide rails in the transmission groove and the slider of the protective cover to ensure stable lifting. The drive motor drives the transmission shaft to rotate through the bevel gear transmission, and the steel cable is wound up and down to adjust the height of the protective cover. The limit plates at both ends of the transmission shaft prevent the steel cable from deviating. The encoder provides real-time feedback on the displacement to achieve precise adjustment. This solves the problem of traditional devices relying on manual height adjustment and having low precision. It can quickly adjust the supplementary blowing height according to the converter smelting requirements and improve the adaptability of the supplementary blowing process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0023] Figure 2 This is an isometric drawing of the present disclosure;

[0024] Figure 3 This is an isometric drawing from another perspective of this disclosure;

[0025] Figure 4 This is an isometric sectional view of the present disclosure;

[0026] In the diagram: 1. Support frame; 2. Protective cover; 3. Air supply assembly; 3-1. Moving frame; 3-2. Air chamber; 3-3. Air pipe; 3-4. Nozzle; 3-5. Circulation chamber; 3-6. Circulation pipe; 3-7. Heat insulation cover; 3-8. Notch; 3-9. Rack; 3-10. Control motor; 3-11. Drive gear; 4. Height adjustment assembly; 4-1. Transmission groove; 4-2. Slide rail; 4-3. Transmission shaft; 4-4. Limiting plate; 4-5. Steel cable; 4-6. Drive motor; 4-7. Transmission gear; 5. Stable base; 6. Fixing hole. Detailed Implementation

[0027] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0028] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0029] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0030] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] like Figures 1-4 As shown, it illustrates a converter high-level supplementary blowing device according to an embodiment of the present disclosure, comprising:

[0034] The support frame 1 and the protective cover 2 are disposed inside the support frame 1;

[0035] A height adjustment component 4 is disposed between the support frame 1 and the protective cover 2;

[0036] A supplementary blowing assembly 3 is disposed within the protective cover 2;

[0037] The supplementary blowing assembly 3 includes a movable frame 3-1, which is movably fitted inside the protective cover 2. An air chamber 3-2 is formed inside the movable frame 3-1. An air pipe 3-3 is provided on one side of the movable frame 3-1, communicating with the interior of the air chamber 3-2. Several nozzles 3-4 are provided on the side surface of the movable frame 3-1, communicating with the air chamber 3-2. A circulation chamber 3-5 is formed inside the movable frame 3-1. A pair of circulation pipes 3-6 are provided on the side end face of the movable frame 3-1. Channel 3-6 is connected to the interior of the circulation chamber 3-5. The circulation chamber 3-5 surrounds the outside of the air chamber 3-2. A heat insulation cover 3-7 is provided on the side end face of the movable frame 3-1. Several nozzles 3-4 are located inside the heat insulation cover 3-7. A notch 3-8 is opened on the top of the protective cover 2. A rack 3-9 is provided on the top of the movable frame 3-1. A control motor 3-10 is provided on the top of the protective cover 2. A drive gear 3-11 is provided at the output end of the control motor 3-10. The drive gear 3-11 meshes with the rack 3-9.

[0038] In some examples, a supplementary blowing assembly 3 is designed to achieve air blowing operations under cooling protection. This assembly centers on a movable frame 3-1, which is movably fitted inside the protective cover 2. Its internal air chamber 3-2 is connected to an external air source via an air pipe 3-3, and nozzles 3-4 evenly distributed on its side surface can blow air directionally into the converter. An internal circulation chamber 3-5 of the movable frame 3-1 surrounds the outside of the air chamber 3-2 in a ring shape, forming a loop with the external cooling system through circulation pipes 3-6 at both ends, allowing for continuous cooling of the air chamber 3-2 and nozzles 3-4. A heat insulation cover 3-7, made of multi-layer ceramic fiber, is installed on the side end face of the movable frame 3-1, covering the nozzle 3-4 area to block the high temperature of the converter. A control motor 3-10 at the top of the protective cover 2 meshes with a drive gear 3-11 and a rack 3-9 at the top of the movable frame 3-1, enabling the movable frame 3-1 to move horizontally within the protective cover 2 and precisely adjust the air blowing position.

[0039] Through the forced cooling design of the circulation chamber 3-5, the composite protection structure of the heat insulation cover 3-7, and the precision transmission of the gear rack 3-9, the supplementary blowing assembly 3 can maintain stable blowing operation in the high-temperature environment of the converter.

[0040] like Figures 1-4 As shown in the figure, the height adjustment component 4 in this embodiment includes a pair of transmission grooves 4-1, which are formed on both sides of the support frame 1. A pair of slide rails 4-2 are provided in the transmission grooves 4-1. The protective cover 2 is slidably connected to the slide rails 4-2. The top of the transmission grooves 4-1 is an open structure. A transmission shaft 4-3 is rotatably connected to the top of the support frame 1. A pair of limiting plates 4-4 are provided at both ends of the transmission shaft 4-3. A pair of steel cables 4-5 are connected between the transmission shaft 4-3 and the protective cover 2. The steel cables 4-5 are located between the pair of limiting plates 4-4. A drive motor 4-6 is provided at the top of the support frame 1. A transmission gear 4-7 is provided at the output end of the drive motor 4-6 and on the transmission shaft 4-3. The transmission gears 4-7 mesh with each other.

[0041] In some examples, a height adjustment component 4 is designed to precisely adjust the blowing height. This component uses the transmission grooves 4-1 on both sides of the support frame 1 as a vertical guide structure. The double slide rails 4-2 inside the grooves cooperate with the slider on the back of the protective cover 2 to ensure no shaking during the lifting process. The transmission shaft 4-3 at the top opening of the transmission groove 4-1 is connected to the top lifting lug of the protective cover 2 via a high-strength steel cable 4-5. The top drive motor 4-6 of the support frame 1 drives the transmission shaft 4-3 to rotate synchronously through a double transmission gear 4-7. When the steel cable 4-5 is being wound up or down, the displacement is fed back in real time by an encoder to control the lifting accuracy of the protective cover 2. Limiting plates 4-4 at both ends of the transmission shaft 4-3 prevent the steel cable 4-5 from shifting or jumping out of the groove during the winding and unwinding process.

[0042] Through the composite structure of steel cable 4-5 hoisting drive and double slide rail 4-2 guidance, the height adjustment component 4 can continuously adjust the blowing height of the supplementary blowing component 3 to adapt to the smelting conditions of converters of different tonnages.

[0043] For example, such as Figure 1 As shown, a pair of stabilizing bases 5 are provided at the lower ends of both sides of the support frame 1, and several fixing holes 6 are provided on the surface of the stabilizing bases 5.

[0044] In some examples, the support frame 1 can be securely fixed to the ground by fasteners passing through a sturdy base 5 and fixing holes 6.

[0045] For example, such as Figure 1 As shown, both of the transmission gears 4-7 are bevel gears with 90° transmission.

[0046] In some examples, the 90° transmission structure of the bevel gears allows the rotating shaft to simultaneously wind up and unwind two steel cables 4-5.

[0047] In actual use: the support frame 1 is fixed to the side of the converter via the stable base 5 and the fixing hole 6. The protective cover 2 is installed in the transmission groove 4-1 of the support frame 1 via the slide rail 4-2. The movable frame 3-1 of the supplementary blowing assembly 3 is movably fitted in the protective cover 2. The air chamber 3-2 inside the movable frame 3-1 is connected to the air source via the air pipe 3-3. The circulation chamber 3-5 is connected to the cooling system via the circulation pipe 3-6. The control motor 3-10 at the top of the protective cover 2 meshes with the rack 3-9 of the movable frame 3-1 via the drive gear 3-11. The height adjustment assembly 4 is driven by... Shaft 4-3 is connected to protective cover 2 via steel cable 4-5. Drive motor 4-6 controls the rotation of drive shaft 4-3 via bevel gear transmission. In use, drive motor 4-6 drives drive shaft 4-3 to wind up and unwind steel cable 4-5 to adjust the height of protective cover 2. Control motor 3-10 drives moving frame 3-1 to move horizontally within protective cover 2. Cooling system cools moving frame 3-1 and nozzle 3-4 via circulation chamber 3-5 and circulation pipe 3-6. Heat insulation cover 3-7 protects nozzle 3-4. Air pipe 3-3 supplies air through air chamber 3-2 and blows it out from nozzle 3-4.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A high-ladle top blowing device for a converter, characterized by include: A support frame (1) and a protective cover (2), wherein the protective cover (2) is disposed inside the support frame (1); A height adjustment component (4) is disposed between the support frame (1) and the protective cover (2); A supplementary blowing assembly (3) is disposed within the protective cover (2); The supplementary blowing assembly (3) includes a movable frame (3-1), which is movably connected to the inside of the protective cover (2). An air chamber (3-2) is opened inside the movable frame (3-1). An air pipe (3-3) is provided on one side of the movable frame (3-1), and the air pipe (3-3) is connected to the inside of the air chamber (3-2). A plurality of nozzles (3-4) are provided on the side surface of the movable frame (3-1), and the nozzles (3-4) are connected to the air chamber (3-2).

2. The converter high-level supplementary blowing device according to claim 1, characterized in that, The movable frame (3-1) has a circulation chamber (3-5) inside. The movable frame (3-1) has a pair of circulation pipes (3-6) on its side end face. The circulation pipes (3-6) are connected to the inside of the circulation chamber (3-5). The circulation chamber (3-5) surrounds the outside of the air chamber (3-2). The movable frame (3-1) has a heat insulation cover (3-7) on its side end face. Several nozzles (3-4) are located inside the heat insulation cover (3-7).

3. The converter high-level supplementary blowing device according to claim 2, characterized in that, The protective cover (2) has a notch (3-8) on the top, the movable frame (3-1) has a rack (3-9) on the top, the protective cover (2) has a control motor (3-10) on the top, the output end of the control motor (3-10) has a drive gear (3-11), and the drive gear (3-11) meshes with the rack (3-9).

4. The converter high-level supplementary blowing device according to claim 1, characterized in that, The height adjustment component (4) includes a pair of transmission grooves (4-1), which are formed on both sides of the support frame (1). A pair of slide rails (4-2) are provided in the transmission grooves (4-1), and the protective cover (2) is slidably connected to the slide rails (4-2).

5. A converter high-level supplementary blowing device according to claim 4, characterized in that, The top of the transmission groove (4-1) is open, and the top of the support frame (1) is rotatably connected to the transmission shaft (4-3). Both ends of the transmission shaft (4-3) are provided with a pair of limiting plates (4-4). A pair of steel cables (4-5) are connected between the transmission shaft (4-3) and the protective cover (2).

6. A converter high-level supplementary blowing device according to claim 5, characterized in that, The steel cable (4-5) is located between a pair of limiting plates (4-4). A drive motor (4-6) is provided on the top of the support frame (1). A transmission gear (4-7) is provided on both the output end of the drive motor (4-6) and the transmission shaft (4-3). The transmission gears (4-7) mesh with each other.

7. A converter high-level supplementary blowing device according to claim 1, characterized in that, The support frame (1) has a pair of sturdy bases (5) on both sides of its lower end, and the sturdy bases (5) have several fixing holes (6) on their surface.

8. A converter high-level supplementary blowing device according to claim 6, characterized in that, Both of the aforementioned transmission gears (4-7) are bevel gears with 90° transmission.

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