Steel ladle nozzle treatment fixing rod

Abstract

The invention discloses a ladle nozzle treatment fixing rod which comprises a base, and a rotary supporting assembly is installed on the base. The rotary supporting assembly comprises a top supporting rod; the bottom of the supporting rod is connected with a horizontal supporting plate, and the outer diameter of the supporting plate is larger than the inner diameter of the ladle nozzle. The supporting plate is rotationally connected with the base through the lengthening rod. The difference between the outer diameter of the supporting rod and the inner diameter of the ladle nozzle is smaller than a threshold value, and the length of the supporting rod is smaller than that of the ladle nozzle. The steel ladle nozzle can be arranged outside the supporting rod in a sleeving mode, the bottom of the steel ladle nozzle is supported through the supporting plate, the steel ladle nozzle is lifted to the height facilitating operation in combination with the design of the lengthening rod, and when slurry is smeared outside the steel ladle nozzle through rotary connection of the lengthening rod and the base, operation can be convenient, and the thickness uniformity of the slurry at all parts can be improved.

Description

Technical Field

[0001] This invention belongs to the field of hot repair technology for steel ladles, and particularly relates to a fixing rod for the nozzle of a steel ladle. Background Technology

[0002] The ladle nozzle is a key component in the continuous casting process. Installed at the bottom of the ladle, it controls the flow rate and opening / closing of the molten steel. Ladle nozzles need to be replaced regularly to ensure operational safety.

[0003] During the replacement of the ladle nozzle, mud needs to be evenly applied to the outer surface of the new nozzle. The nozzle, now coated with mud, is then inserted into the pre-drilled hole in the ladle, and finally, components such as the slide plate are installed. The entire process must be carried out on a hot repair platform 3-5 meters high. Due to the limited operating space, the mud thickness on the outside of the nozzle is not uniform, and the nozzle itself (which typically weighs tens of kilograms) is difficult to lift and install due to the mud coating. Summary of the Invention

[0004] The purpose of this invention is to provide a ladle nozzle fixing rod to improve the uniformity of the mud around the ladle nozzle and the ease of installation.

[0005] The present invention adopts the following technical solution: a steel ladle nozzle treatment fixing rod, including a base, on which a rotating support assembly is installed; The rotating support assembly includes a top support rod; A horizontal support plate is connected to the bottom of the support rod, and the outer diameter of the support plate is larger than the inner diameter of the ladle nozzle; The support plate is rotatably connected to the base via an extension rod; The difference between the outer diameter of the support rod and the inner diameter of the ladle nozzle is less than the threshold, and the length of the support rod is less than the length of the ladle nozzle.

[0006] The beneficial effects of this invention are: this invention can fit the ladle nozzle outside the support rod, and the bottom is supported by the support plate. Combined with the design of the extension rod, the ladle nozzle can be raised to a height that is convenient for operation. Moreover, through the rotatable connection between the extension rod and the base, it is easier to operate when applying mud to the outside of the ladle nozzle, and the uniformity of the mud thickness in each part can be improved. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of a steel ladle nozzle fixing rod according to an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of a steel ladle nozzle fixing rod according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the bottom structure of the extended rod in an embodiment of the present invention; Figure 4This is a schematic diagram illustrating the usage state of a steel ladle nozzle fixing rod according to an embodiment of the present invention; Figure 5 This is a schematic diagram showing the usage state of the lower part of the ladle nozzle fixing rod according to an embodiment of the present invention.

[0008] Among them: 10. Support rod; 20. Support plate; 30. Support pipe; 40. Extension rod; 50. Base; 60. Connecting pipe; 70. Bearing; 80. Steel ladle nozzle. Detailed Implementation

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0010] In the iron and steel metallurgical process, the ladle, as a crucial container holding molten steel at high temperatures, has a vital impact on production safety and smooth operation due to the replacement and use of its nozzles. Ensuring the good condition of the ladle nozzles is essential for the normal operation of the ladle and the quality of the molten steel. Traditional ladle nozzle treatment methods typically rely on manual experience and simple tools, making it difficult to achieve precise positioning and uniform mud application. This results in unstable mud layer quality, affecting the service life of the ladle and the quality of the molten steel.

[0011] As a priori technology upon which this invention is based, the maintenance and treatment of ladle nozzles is a common operation in the field of ladle hot repair. However, previous techniques have many shortcomings. For example, during the slurry application process, due to the lack of an effective positioning device, operators find it difficult to accurately control the position and thickness of the slurry, which can easily lead to uneven slurry layers. This can result in gaps between the nozzle and the bedding bricks or excessively thick slurry in certain areas, causing misalignment and subsequently leading to problems such as molten steel flow deviation, severe corrosion of refractory materials in certain areas, or even steel seepage.

[0012] Simple clamps or support devices are typically used to secure ladle nozzles, but these devices are often simple in structure and limited in function, unable to achieve flexible rotation and precise positioning. During the slurry application process, they cannot adequately accommodate nozzles of different specifications, nor can they provide standard space for nozzles, slide plate mud pads, and other components, making it difficult to guarantee quality when replacing nozzles.

[0013] This invention discloses a fixing rod for treating steel ladle nozzles, such as... Figure 1 As shown, the system includes a base 50, on which a rotating support assembly is mounted. The rotating support assembly includes a top support rod 10. A horizontal support plate 20 is connected to the bottom of the support rod, and the outer diameter of the support plate 20 is larger than the inner diameter of the ladle nozzle 80. The support plate 20 is rotatably connected to the base 50 via an extension rod 40. The difference between the outer diameter of the support rod 10 and the inner diameter of the ladle nozzle 80 is less than a threshold value, and the length of the support rod 10 is less than the length of the ladle nozzle 80 (this can prevent the front end of the support rod 10 from colliding with other components and affecting the installation accuracy when installing the ladle nozzle 80).

[0014] The present invention can fit the ladle nozzle 80 onto the outside of the support rod 10, and support the bottom through the support plate 20. Combined with the design of the extension rod 40, the ladle nozzle 80 can be raised to a height that is convenient for operation. Moreover, through the rotatable connection between the extension rod 40 and the base 50, it is easier to operate when applying mud to the outside of the ladle nozzle 80, and the thickness uniformity of the mud in each part can be improved.

[0015] The base 50 is made of round steel plate, which has a certain weight to ensure the stability of the entire device. In addition, a counterweight can be placed on the base 50 during use to further ensure stability. The inner hole of the support rod 10 and the ladle nozzle 80 are matched, and the threshold is preferably in the millimeter range, such as 2mm or 4mm. This allows the axes of the two to be closer, thereby maximizing the unloading of the weight of the ladle nozzle 80 onto the base 50. The presence of a certain gap also facilitates the separation of the support rod 10 and the ladle nozzle 80 during installation.

[0016] In one embodiment, both the extension rod 40 and the support rod 10 are hollow tubes. This design reduces the overall weight of the fixing rod, and after the ladle nozzle 80 is coated with mud, it is easier for workers to hold the extension rod 40 and place the ladle nozzle 80 into the predetermined position. In this embodiment, the rods, tubes, and other components are preferably straight rods and straight tubes.

[0017] Specifically, such as Figure 2 and Figure 3 As shown, the bottom of the extension rod 40 is rotatably connected to the connecting pipe 60 via a bearing 70, and the connecting pipe 60 is detachably connected to the base 50. The bearing 70 facilitates the rotation of the extension rod 40, thereby facilitating the rotation of the ladle nozzle 80.

[0018] Furthermore, a handle can be provided on the extension rod 40 radially or obliquely, so that force can be easily applied to the extension rod 40 to make it rotate.

[0019] The base 50 has a mounting hole in the middle, into which the bottom of the connecting pipe 60 is inserted. A washer is provided between the connecting pipe 60 and the base 50. The base 50 and the connecting pipe 60 are connected by a plug-in type. When the ladle nozzle 80 needs to be installed, the connecting pipe 60 can be pulled out of the base 50 using the extension rod 40. The operator then holds the extension rod 40 and places the ladle nozzle 80 into the designated position. After installation, the connecting pipe 60 is then inserted back into the mounting hole. The addition of the washer increases the friction between the base 50 and the connecting pipe 60, preventing the connecting pipe 60 from rotating with the extension rod 40.

[0020] In one embodiment, the extension rod 40 is coaxially arranged with the support plate 20. When the ladle nozzle 80 is placed on the support plate 20, since the ladle nozzle 80 is relatively heavy, generally weighing tens of kilograms, the coaxial arrangement can ensure that the force is evenly distributed at all positions of the support plate 20, and can prevent local deformation of the support plate 20, thereby increasing the positioning accuracy of the ladle nozzle 80.

[0021] Furthermore, a support tube 30 is provided on the outer periphery of the top of the extension rod 40 and the bottom of the support plate 20. The support tube 30 is a tapered tube; the bottom end of the tapered tube is fixedly connected to the extension rod 40, and the top end of the tapered tube is fixedly connected to the bottom of the support plate 20; the extension rod 40, the tapered tube, and the support plate 20 are coaxially arranged. The support tube 30 is equivalent to providing diagonal support for the bottom of the support plate 20, and the diagonal support is also evenly distributed, so this method can further increase the stability of the support plate 20.

[0022] Alternatively, several struts can be used to replace the support tube 30, and the design can be customized according to actual needs.

[0023] In summary, the core inventive point of this invention lies in the rotatable connection between the base 50 and the extension rod 40, and the detachable structure between the connecting pipe 60 and the base 50. The advantages are simplified replacement process, reduced labor intensity and safety risks, ensured uniform slurry and tight component fit, and improved production stability and product quality.

[0024] The pipe used in this invention can be a wear-resistant, high-strength steel pipe, and its inner diameter can be selected as needed.

[0025] During the work process, such as Figure 4 and Figure 5 As shown, first insert the connecting pipe 60 onto the base 50, then place the ladle nozzle 80 onto the support rod 10. The bearing 70 inside the connecting rod 60 easily drives the extension rod 40 to rotate, causing the ladle nozzle 80 to rotate at a uniform speed. The operator uses a slurrying tool to evenly slurry the ladle nozzle 80 as it rotates.

[0026] After the mud is applied, the operator removes the connecting pipe 60, holds the extension rod 40, and inserts it into the ladle in a spiral motion while rotating it (a friction layer can also be added to the outside of the support rod 10, or the outer diameter of the support rod 10 can be equal to the inner diameter of the ladle nozzle 80) to replace it, thereby forming a uniform mud layer.

[0027] In the entire device, the relative positions and connections between the various components are closely coordinated to achieve efficient, precise, and stable processing of the ladle nozzle 80. The functions of each component work synergistically: the base 50 provides stable support and a foundation for rotation; the extension rod 40 and support plate 20 transmit rotational power; and the support plate 20 provides stable support for the ladle nozzle 80 and ensures adequate space. The working processes and actions of each component proceed in an orderly sequence, collectively achieving high-quality processing of the ladle nozzle.

[0028] This invention aims to optimize the hot repair of steel ladles, the process of mud removal, positioning and replacement of nozzles, improve the efficiency and quality of nozzle replacement, ensure the stable operation of steel ladles in high-temperature environments, and thus guarantee the continuity and safety of steel production.

[0029] By optimizing the sprue replacement process, the labor intensity of operators is reduced, operation time is shortened, and operational safety is improved, freeing it from the severe effects of high-temperature environments. Ensuring uniform distribution of slurry on the contact surface between the sprue and the slab ensures precise alignment, preventing molten steel deviation and excessive localized erosion of the refractory material, thus preventing steel seepage. Maintaining consistent slurry thickness between the sprue and the slide plate ensures a tight fit, eliminating steel sag and leakage during casting, thereby improving casting quality and production safety.

Claims

1. A fixing rod for treating the nozzle of a steel ladle, characterized in that, Includes a base (50) on which a rotating support assembly is mounted; The rotary support assembly includes a top support rod (10). The bottom of the support rod is connected to a horizontal support plate (20), the outer diameter of which is larger than the inner diameter of the ladle nozzle (80); The support plate (20) is rotatably connected to the base (50) via an extension rod (40); The difference between the outer diameter of the support rod (10) and the inner diameter of the ladle nozzle (80) is less than a threshold, and the length of the support rod (10) is less than the length of the ladle nozzle (80).

2. The steel ladle nozzle fixing rod as described in claim 1, characterized in that, The bottom of the extension rod (40) is rotatably connected to the connecting tube (60) via a bearing (70), and the connecting tube (60) is detachably connected to the base (50).

3. The steel ladle nozzle fixing rod as described in claim 2, characterized in that, The base (50) has a mounting hole in the middle, and the bottom of the connecting tube (60) is inserted into the mounting hole.

4. A steel ladle nozzle fixing rod as described in claim 3, characterized in that, A gasket is provided between the connecting pipe (60) and the base (50).

5. A steel ladle nozzle treatment fixing rod as described in claim 3 or 4, characterized in that, The extension rod (40) is coaxially arranged with the support plate (20).

6. The steel ladle nozzle fixing rod as described in claim 5, characterized in that, The extension rod (40) has a support tube (30) on its top outer periphery and the support plate (20) has a support tube (30) on its bottom bottom. The support tube (30) is a tapered tube. The bottom end of the tapered tube is fixedly connected to the extension rod (40). The top of the tapered tube is fixedly connected to the bottom of the support plate (20); The extension rod (40), the tapered tube, and the support plate (20) are coaxially arranged.

7. A steel ladle nozzle fixing rod as described in claim 6, characterized in that, Both the extension rod (40) and the support rod (10) are hollow tubes.

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