A restraint and positioning device for a refractory furnace cover of a refining furnace and a refining furnace system

Abstract

The utility model relates to the technical field of steel smelting equipment, concretely relates to a constraint and positioner of refining furnace refractory furnace cover and refining furnace system, be applied to the water -cooled furnace cover and refractory furnace cover of refining furnace, include: the ring constraint mechanism, its cover and hold tightly in the outer periphery of refractory furnace cover, for the radial expansion deformation of constraint refractory furnace cover, displacement restriction mechanism is fixedly arranged in water -cooled furnace cover and is connected with ring constraint mechanism simultaneously, for limiting the planar displacement of refractory furnace cover relative to water -cooled furnace cover. Through setting the ring constraint mechanism of refractory furnace cover outer periphery, for the brittle refractory furnace cover provided a strong external'skeleton', effectively restricts its radial expansion deformation under the cold and hot alternating environment, significantly reduces the deformation and broken phenomenon, thereby the service life of refractory furnace cover is prolonged from the existing 1-2 years to 3-5 years, and the equipment replacement and maintenance cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of steel smelting equipment technology, and in particular to a constraint and adjustment device for a refractory furnace cover of a refining furnace and a refining furnace system. Background Technology

[0002] In the steel metallurgical industry, the LF refining furnace is a crucial piece of process equipment. Its refractory furnace cover endures prolonged high temperatures during refining and power supply, and then rapidly cools down when the furnace is shut down. This frequent alternation of hot and cold temperatures induces enormous thermal stress, causing the refractory furnace cover to deform, crack, or even break. Simultaneously, the mechanical vibrations during the furnace cover's vertical movement and refining process can easily cause it to deviate from its original installation position, resulting in misalignment between the electrodes and the furnace cover's center. When the electrodes descend and rub against the furnace cover, it not only affects normal power supply but can also potentially lead to a serious safety accident such as electrode breakage.

[0003] Currently, there is a general lack of effective proactive protection and adjustment methods to address the aforementioned problems. Once the refractory furnace cover shifts position due to slag adhesion or cracks, its adjustment is extremely difficult, typically requiring the use of multiple tools and coordinated work by personnel in a dangerous high-altitude environment, posing significant safety hazards. Due to the inability to achieve effective restraint and precise positioning, the average service life of the refractory furnace cover is limited to 1 to 2 years. Frequent replacement and adjustment not only increase production costs but also pose a continuous threat to production safety and continuity.

[0004] Therefore, there is an urgent need in this field for a device that can fundamentally enhance the overall structural strength of the refractory furnace cover and enable precise and convenient adjustment of its position, so as to extend its service life and ensure the safe, stable and efficient operation of the refining furnace. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a constraint and adjustment device for the refractory furnace cover of a refining furnace, so as to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides a constraint and adjustment device for a refractory furnace cover of a refining furnace, applicable to water-cooled furnace covers and refractory furnace covers of a refining furnace, comprising: A circumferential constraint mechanism is fitted and held tightly around the outer periphery of the refractory furnace cover to constrain the radial expansion deformation of the refractory furnace cover. A displacement limiting mechanism is fixedly installed on the water-cooled furnace cover and simultaneously connected to the circumferential constraint mechanism. It is used to limit the planar displacement of the refractory furnace cover relative to the water-cooled furnace cover. By operating the displacement limiting mechanism, the position of the circumferential constraint mechanism and the refractory furnace cover fixed thereto relative to the water-cooled furnace cover in the plane can be adjusted.

[0007] As a preferred technical solution of this utility model, the circumferential constraint mechanism is a refractory tightening clamp, which is an adjustable ring structure.

[0008] As a preferred technical solution of this utility model, the refractory material tightening clamp is a split structure, which includes two semi-circular clamp bodies, and the two ends of the two clamp bodies are connected by a set clamping bolt.

[0009] As a preferred technical solution of this utility model, the refractory material tightening clamp is an integrated ring structure with an adjustment notch on one side, and the two sides of the adjustment notch are connected by a set retaining bolt.

[0010] As a preferred technical solution of this utility model, a buffer layer is provided on the inner side of the refractory tightening clamp.

[0011] As a preferred embodiment of this utility model, the displacement limiting mechanism includes an adjuster frame and multiple adjuster bolts. The adjuster frame is fixed above the water-cooled furnace cover. The circumferential constraint mechanism and the adjuster frame are provided with multiple through holes spaced apart in the circumferential direction. The adjuster bolts pass through and connect the through holes on the adjuster frame and the circumferential constraint mechanism in sequence.

[0012] As a preferred embodiment of this utility model, the number of adjusting bolts of the adjuster is eight, and they are evenly distributed along the circumference.

[0013] To better solve the above-mentioned technical problems, this utility model also provides a refining furnace system, including a water-cooled furnace cover, a refractory furnace cover, and a constraint and adjustment device for the refractory furnace cover of the refining furnace as described in any one of the above.

[0014] The beneficial effects of this utility model are: 1. Significantly improve structural strength and service life: By setting a circumferential constraint mechanism on the outer periphery of the refractory furnace cover, a strong external "skeleton" is provided for the brittle refractory furnace cover, which effectively constrains its radial expansion deformation under alternating hot and cold environments, significantly reducing deformation and breakage, thereby extending the service life of the refractory furnace cover from the current 1-2 years to 3-5 years, and reducing equipment replacement and maintenance costs.

[0015] 2. Effectively prevent safety accidents and ensure continuous production: The displacement limiting mechanism, which rigidly connects the refractory furnace cover and the water-cooled furnace cover, can firmly lock the planar position of the refractory furnace cover under normal conditions, effectively resisting operational vibrations and fundamentally avoiding the risk of electrode scraping and breakage caused by furnace cover displacement, thus ensuring safe production and continuous operation.

[0016] 3. Safe and convenient operation and precise positioning: Using multiple circumferentially distributed adjusting bolts, the position of the refractory furnace cover can be adjusted online, in small amounts, and precisely when needed. The operation process is simple, without the need for complicated tools and high-risk high-altitude collaborative work, which significantly reduces labor intensity and safety risks. At the same time, it ensures the concentricity of the furnace cover and the electrode and optimizes the process effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall assembly structure of this utility model; Figure 2 This is a schematic diagram of the refractory material clamping hoop and locking bolt structure of this utility model; Figure 3 This is a schematic diagram of the adjuster frame and adjuster adjusting bolt structure of this utility model.

[0019] The markings in the diagram are: 1. Refractory clamping hoop; 2. Locking bolt; 3. Adjuster frame; 4. Adjuster adjusting bolt; 5. Refractory furnace cover; 6. Water-cooled furnace cover. Detailed Implementation

[0020] 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 specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, a constraint and adjustment device for a refractory furnace cover of a refining furnace is applied to a water-cooled furnace cover 6 and a refractory furnace cover 5 of a refining furnace. The device includes: a circumferential constraint mechanism, which is sleeved and tightly fitted around the outer periphery of the refractory furnace cover 5 to constrain the radial expansion deformation of the refractory furnace cover 5; and a displacement limiting mechanism, which is fixedly disposed on the water-cooled furnace cover 6 and simultaneously connected to the circumferential constraint mechanism to limit the planar displacement of the refractory furnace cover 5 relative to the water-cooled furnace cover 6. By operating the displacement limiting mechanism, the position of the circumferential constraint mechanism and the refractory furnace cover 5 fixed thereto relative to the water-cooled furnace cover 6 in the plane can be adjusted. The above-mentioned technical solution solves the core problems of the refractory furnace cover 5 being prone to breakage due to thermal shock and displacement due to vibration. Specifically, its working principle is as follows: the radial deformation of the refractory furnace cover 5 is actively limited by the circumferential constraint mechanism, and it is rigidly connected to the water-cooled furnace cover 6 by the displacement limiting mechanism. In use, the circumferential constraint mechanism is first fitted and tightened around the outer periphery of the refractory furnace cover 5, and at the same time, the displacement limiting mechanism is fixed to the water-cooled furnace cover 6 and connected to the circumferential constraint mechanism. This can significantly improve the overall structural integrity of the furnace cover to extend its service life, and can achieve precise adjustment of its planar position relative to the water-cooled furnace cover 6, fundamentally preventing electrode scratches and breakage accidents.

[0023] like Figure 1 and Figure 2 As shown, in this embodiment, the circumferential constraint mechanism is a refractory tightening clamp 1, which is an adjustable ring structure; The above technical solution can solve the problems of insufficient tensile strength and easy radial expansion and cracking of refractory materials. Specifically, its working principle is as follows: as an adjustable ring structure, it binds the refractory furnace cover 5 by applying an inward tightening circumferential force. In use, during installation or maintenance, the refractory clamping hoop 1 is fitted around the outer periphery of the refractory furnace cover 5 and tightened to an appropriate degree, thereby enhancing the overall strength of the refractory furnace cover 5 from the outside and effectively restraining its thermal expansion deformation.

[0024] Optionally, in this embodiment, the refractory clamping hoop 1 is a split structure, which includes two semi-circular hoop bodies, and the two ends of the two hoop bodies are connected by a set clamping bolt 2; The above technical solution solves the problems of inconvenient installation and difficulty in adapting to existing damaged furnace covers with the integrated ring structure. Specifically, its working principle is as follows: the combination of two semi-circular hoops and locking bolts 2 enables the closure and tightness adjustment of the refractory clamping hoop 1. In use, the two hoops are first placed on both sides of the refractory furnace cover 5, and then the two ends are connected with locking bolts 2 and gradually tightened. This facilitates on-site installation and disassembly, and can repair and tighten furnace covers with slight deformation, making it more widely applicable.

[0025] like Figure 2As shown, in this embodiment, the refractory clamping hoop 1 is an integral ring structure with an adjustment notch on one side, and the two sides of the adjustment notch are connected by the clamping bolts 2. The above technical solution can solve the structural strength and stability problems that may exist in split structures. Specifically, this is another implementation method: the refractory clamping hoop 1 is an integrated structure with an adjustment notch. Its working principle is: using the elastic deformation of the structure itself and the tension of the clamping bolt 2, the opening is closed to clamp the furnace cover. In use, its opening characteristic is used to directly insert it into the outer circumference of the refractory furnace cover 5, and then the clamping bolt 2 at the adjustment notch is tightened. The structure is simpler, the overall rigidity is better, and it can provide a more uniform constraint force, making it suitable for space-constrained scenarios.

[0026] Optionally, in this embodiment, a buffer layer is provided on the inner side of the refractory tightening clamp 1; The above technical solution can solve the problem that direct contact between the metal refractory clamping hoop 1 and the refractory furnace cover 5 may crush or abrade the surface of the refractory furnace cover 5. Specifically, its working principle is as follows: the buffer layer, as a flexible medium between the metal clamping hoop and the brittle refractory, can absorb stress and disperse pressure. In use, the buffer layer is installed together with the refractory clamping hoop 1 and directly contacts the outer surface of the refractory furnace cover 5, protecting the refractory body, compensating for unevenness of the contact surface, and making the constraint force distribution more uniform, further extending the life of the furnace cover. To further clarify its composition, the buffer layer can be made of flexible high-temperature resistant materials such as refractory fiber felt, asbestos board, or ceramic cotton blanket, with a preferred thickness of 5-15mm, and can be fixed to the inside of the refractory clamping hoop 1 by high-temperature resistant adhesive or mechanical means.

[0027] like Figure 1 and Figure 3 As shown, in this embodiment, the displacement limiting mechanism includes an adjuster frame 3 and multiple adjuster adjusting bolts 4. The adjuster frame 3 is fixed above the water-cooled furnace cover 6. The circumferential constraint mechanism and the adjuster frame 3 are provided with multiple through holes spaced apart in the circumferential direction. The adjuster adjusting bolts 4 pass through and connect the through holes on the adjuster frame 3 and the circumferential constraint mechanism in sequence. The above technical solution solves the problems of difficult adjustment and inaccurate alignment of the refractory furnace cover 5. Specifically, its working principle is as follows: An adjustable rigid connection is formed by screwing in the adjusting bolts 4 through the threaded holes on the adjusting frame 3 and the circumferential constraint mechanism. The adjusting frame 3 is a ring-shaped steel component, fixed to the top of the water-cooled furnace cover 6 by welding. The inner side of the ring frame 3 is compatible with and concentric with the outer contour of the circumferential constraint mechanism, i.e., the refractory clamping clamp 1. Multiple threaded through holes are spaced apart circumferentially on both. The adjusting bolts 4 are screwed in and pass through the corresponding threaded holes on the adjusting frame 3 and the circumferential constraint mechanism, with their ends pressing against or penetrating the circumferential constraint mechanism. To achieve reliable connection and locking, the adjusting bolts 4 can be prevented from loosening by tightening nuts or spring washers after screwing in, enabling online, precise, and controllable adjustment of the refractory furnace cover 5's position and permanently locking its relative position to the water-cooled furnace cover 6, effectively resisting operational vibrations.

[0028] like Figure 1 and Figure 3 As shown, in this embodiment, the number of adjusting bolts 4 is eight, and they are evenly distributed circumferentially. The above technical solution can solve the problems of "dead points" and unstable or inaccurate adjustments that may occur when adjusting a small number of adjusting bolts 4. Specifically, its working principle is as follows: eight adjusting bolts 4 are arranged at approximately 45-degree intervals on the circumference, forming a multi-point, multi-directional adjustment capability. In use, the operator can loosen the bolts at the corresponding positions according to the required angle and direction, so that the refractory clamping hoop 1 and the refractory furnace cover 5 can produce precise micro-position adjustments under the guidance and constraint of the annular frame 3. After adjusting to the target position, all adjusting bolts 4 are tightened to the predetermined torque to complete the positioning and locking, making the force on the refractory furnace cover 5 more balanced and the position adjustment more precise and stable, enabling precise translation in any direction and greatly improving the centering accuracy.

[0029] To better solve the above-mentioned technical problems, this utility model also provides a refining furnace system, including a water-cooled furnace cover 6, a refractory furnace cover 5, and a constraint and adjustment device for the refractory furnace cover of any of the above-mentioned refining furnaces. The above technical solution solves the problems of frequent shutdowns and high safety risks in traditional refining furnace systems caused by short furnace cover lifespan and unstable position. Specifically, its working principle is as follows: the constraint and positioning device is integrated into the refining furnace as a key subsystem. During installation, the adjuster frame 3 is first fixed to the water-cooled furnace cover 6 by welding. Then, the refractory furnace cover 5 is installed and fitted with the refractory clamping hoop 1. Finally, the adjusting bolts 4 are assembled. In use, the system continuously performs constraint and positioning functions during the operation of the refining furnace. This improves the reliability, safety, and production efficiency of the entire refining furnace system, and significantly reduces maintenance costs and the accident rate.

[0030] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0031] This utility model aims to cover all such substitutions, modifications, and variations that fall within its protection scope. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within its protection scope.

Claims

1. A constraint and adjustment device for a refractory furnace cover of a refining furnace, applied to a water-cooled furnace cover (6) and a refractory furnace cover (5) of a refining furnace, characterized in that, include: A circumferential constraint mechanism is fitted and held tightly around the outer periphery of the refractory furnace cover (5) to constrain the radial expansion deformation of the refractory furnace cover (5); The displacement limiting mechanism is fixedly installed on the water-cooled furnace cover (6) and simultaneously connected to the circumferential constraint mechanism. It is used to limit the planar displacement of the refractory furnace cover (5) relative to the water-cooled furnace cover (6). By operating the displacement limiting mechanism, the position of the circumferential constraint mechanism and the refractory furnace cover (5) fixed thereto relative to the water-cooled furnace cover (6) in the plane can be adjusted.

2. The apparatus according to claim 1, characterized in that, The circumferential constraint mechanism is a refractory tightening clamp (1), which is an adjustable ring structure.

3. The apparatus according to claim 2, characterized in that, The refractory clamping hoop (1) is a split structure, which includes two semi-circular hoop bodies. The two ends of the two hoop bodies are connected by a set clamping bolt (2).

4. The apparatus according to claim 2, characterized in that, The refractory clamping hoop (1) is an integral ring structure with an adjustment notch on one side. The two sides of the adjustment notch are connected by a retaining bolt (2).

5. The apparatus according to claim 2, characterized in that, The inner side of the refractory tightening clamp (1) is covered with a buffer layer.

6. The apparatus according to claim 1, characterized in that, The displacement limiting mechanism includes an adjuster frame (3) and multiple adjuster adjusting bolts (4). The adjuster frame (3) is fixed above the water-cooled furnace cover (6). The circumferential constraint mechanism and the adjuster frame (3) are provided with multiple through holes spaced apart in the circumferential direction. The adjuster adjusting bolts (4) pass through and connect the through holes on the adjuster frame (3) and the circumferential constraint mechanism in sequence.

7. The apparatus according to claim 6, characterized in that, The number of the adjusting bolts (4) of the adjuster is eight, and they are evenly distributed in the circumferential direction.

8. A refining furnace system, characterized in that, It includes a water-cooled furnace cover (6), a refractory furnace cover (5), and a restraint and adjustment device for the refractory furnace cover of the refining furnace as described in any one of claims 1 to 7.

Images