Steel ladle cover for supporting use of steel ladles with different sizes

Abstract

The utility model discloses a steel ladle cover for supporting the use of steel ladles with different sizes, which comprises a first cover body and a second cover body, the second cover body is detachably arranged on the first cover body, the first cover body is in a hollow cylinder shape, a first refractory material is filled in the first cover body, a baffle ring is convexly arranged on the outer circumferential surface of the first cover body, the second cover body is in a circular ring shape, and the first refractory material is filled in the second cover body. The inner wall of the second cover body is provided with a first clamping surface, the side wall of the second cover body is provided with an interlayer structure, the interlayer structure is filled with a second refractory material, the top surface of the first cover body is provided with a first socket, the top surface of the second cover body is provided with a second socket, and bolts are inserted into the first socket and the second socket. According to the steel ladle cover, the second cover body and the first cover body are detachably connected, during adjustment, the second cover body is sleeved outside the first cover body, the first clamping surface is clamped on the baffle ring to be positioned, and then the bolt is inserted, so that the steel ladle cover is adaptive to different calibers, the applicability of the steel ladle cover is improved, and the equipment investment and the maintenance cost are effectively reduced.

Description

A ladle cover that supports different sizes of ladles Technical Field

[0001] This utility model relates to the field of ladle cover technology, specifically to a ladle cover that supports the use of ladles of different sizes. Background Technology

[0002] A ladle cover is a lid placed over a ladle during ladle furnace operations. It is installed by a ladle covering device to keep the molten steel in the ladle warm. Currently, the diameter of ladles used is not entirely standardized; its design needs to be adjusted based on factors such as capacity, metallurgical process, and usage scenario. For example, 80-ton ladles have diameters ranging from 3191mm (standard type) to 3478mm (short and stout type). However, existing ladle covers are mostly of fixed sizes and cannot accommodate ladles of different diameters, forcing steel smelters to configure various specifications of ladle covers, which undoubtedly increases equipment investment and maintenance costs.

[0003] Chinese Patent Publication No. CN220144750U discloses a novel ladle cover, comprising a cover body, a second fixing plate fixedly connected to the upper surface of the cover body, a third threaded hole inside the second fixing plate, a threaded rod threadedly connected to the inner wall of the third threaded hole, a rotating shaft fixedly connected to one end of the threaded rod, and the two ends of the rotating shaft rotatably connected to the inner wall of the mounting opening, the mounting opening being located inside a first fixing plate, a connecting hole inside the first fixing plate, and a connecting rod rotatably connected to the inner wall of the connecting hole. This patent achieves the effect of fixing the ladle cover to the ladle by rotating the threaded rod to push the rotating shaft and one end of the first fixing plate to move, thereby causing the other end of the first fixing plate to move in the opposite direction, driving a clamping plate to hold the outer wall of the ladle; however, its cover body is also of a single size and cannot be adapted to ladles of different diameters. Summary of the Invention

[0004] The main purpose of this utility model is to overcome the defects of the above-mentioned background technology and provide a ladle cover that supports the use of ladles of different sizes.

[0005] To achieve the above objectives, this utility model proposes a ladle cover that supports the use of ladles of different sizes, including a first cover body and a second cover body. The second cover body is detachably installed on the first cover body. The first cover body is a hollow cylinder with an open bottom end, and the hollow interior of the first cover body is filled with a first refractory material. A retaining ring is protruding on the outer circumference of the first cover body. The second cover body is annular, and the inner wall of the second cover body is provided with a first locking surface corresponding to the retaining ring. The side wall of the second cover body is provided with a sandwich structure with an open bottom end, and the sandwich structure is filled with a second refractory material. Several first insertion ports are provided around the top edge of the first cover body, and the top surface of the second cover body is provided with a second insertion port corresponding to the first insertion ports. Pins are inserted into the first and second insertion ports. When the diameter of the ladle cover needs to be increased, the second socket acts as a lifting ring to lift the second cover and slip it over the top of the first cover. After the first locking surface of the second cover is engaged with the top surface of the retaining ring, the first and second sockets are aligned, and then pins are inserted into the first and second sockets for fixation. When disassembling the second cover, the pins can be pulled out to lift it out. This achieves compatibility with different diameters of the ladle cover and improves its applicability.

[0006] In a further optimized technical solution, a locking bolt is provided on the first or second socket. After the pin is inserted into the first or second socket, the locking bolt is tightened downwards, and the bottom end of the locking bolt abuts against the pin to prevent the pin from moving and ensure stability.

[0007] In a further optimized technical solution, several anchoring nails are horizontally arranged within the sandwich structure. When the second refractory material is poured into the sandwich structure, the anchoring nails can replace and fix the second refractory material, reducing the probability of the second refractory material falling off.

[0008] In a further optimized technical solution, the height of the inner wall of the sandwich structure is less than the height of the outer wall, and the second refractory material covers the bottom end of the inner wall of the sandwich structure. This design, where the inner wall height is less than the outer wall height, ensures that the second refractory material has sufficient thickness space when covering the bottom end of the inner wall, preventing the steel structure from contacting the molten steel and causing corrosion, thus affecting its service life.

[0009] In a further optimized technical solution, the bottom end of the outer wall of the sandwich structure is set with a rounded chamfer. The rounded chamfer forms a conical guide surface, which can automatically correct positional deviations when the ladle cover is put on, shortening the ladle cover closing operation time.

[0010] In a further optimized technical solution, the first refractory material covers the bottom end of the side wall of the first cover, and an annular refractory brick is fitted onto the outer circumferential surface of the first cover on the side below the retaining ring. By covering the bottom end of the side wall of the first cover with the first refractory material and the outer circumferential surface of the first cover with the annular refractory brick, the first cover is prevented from contacting molten steel, thus avoiding corrosion and affecting its service life.

[0011] In a further optimized technical solution, several through holes are horizontally formed around the side wall of the first cover. Anchor rods are inserted into the through holes, with one end extending into the hollow area inside the first cover and the other end extending to the outer circumference of the first cover, so that the annular refractory brick is inserted and fixed on the anchor rod. The anchor rod serves to fix the first refractory material at one end and to fix the annular refractory brick at the other end, preventing the refractory material from falling off.

[0012] In a further optimized technical solution, a sleeve is also included. The sleeve is annular in shape, and its sidewall has a second locking surface corresponding to the bottom end of the annular refractory brick. A fixing hole is provided on the sidewall of the sleeve, and a threaded hole corresponding to the fixing hole is provided on the outer circumference of the retaining ring. Fixing bolts are installed in the fixing hole and the threaded hole. When the first cover is used alone, the sleeve wraps around the bottom edge of the first cover, preventing the annular refractory brick from directly contacting the top of the ladle and affecting its service life. When the first cover and the second cover are used together, the sleeve can be removed by loosening the fixing bolts without affecting the connection between the first cover and the second cover.

[0013] In a further optimized technical solution, the bottom end of the cover is designed with a rounded chamfer. When the first cover is used alone, the rounded chamfer forms a conical guide surface, which can automatically correct positional deviations when the ladle cover (first cover) is placed on top, thus shortening the ladle cover closing operation time.

[0014] In a further optimized technical solution, the top surface of the first cover is provided with lifting lugs. These lugs connect to external lifting devices, facilitating the handling and use of the ladle cover.

[0015] The beneficial effects of this utility model include: by setting the second cover and the first cover to be detachably connected, when it is necessary to increase the diameter of the ladle cover for use on ladles with larger diameters, the second cover is fitted onto the first cover. After the first locking surface of the second cover is positioned by locking onto the top surface of the retaining ring, a pin is inserted into the first and second sockets for fixation, thus completing the expansion and adjustment; when it is necessary to reduce the diameter of the ladle cover, the pin is pulled out, and the second cover is lifted out through the second socket. This realizes the adaptation of the ladle cover to different diameters, improves the applicability of the ladle cover, and effectively reduces equipment investment and maintenance costs. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the top surface of the ladle cover in an embodiment of this utility model.

[0017] Figure 2 is a schematic diagram of the bottom surface of the ladle cover in an embodiment of this utility model.

[0018] Figure 3 is a schematic diagram of the second cover in an embodiment of this utility model.

[0019] Figure 4 is an exploded view of the installation of the first cover, the annular refractory brick and the sleeve in an embodiment of this utility model.

[0020] Figure 5 is a schematic diagram of the sleeve in an embodiment of this utility model.

[0021] Reference numerals: 1 First cover; 101 Retaining ring; 102 First insertion port; 103 Through hole; 104 Anchor rod; 105 Threaded hole; 2 Second cover; 201 First locking surface; 202 Sandwich structure; 203 Second insertion port; 204 Anchor nail; 205 Rounded chamfer; 3 First refractory material; 4 Second refractory material; 5 Pin; 6 Locking bolt; 7 Annular refractory brick; 8 Sheath; 801 Second locking surface; 802 Fixing hole; 9 Fixing bolt; 10 Lifting lug. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects of the embodiments 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 merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of 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.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] Example 1

[0027] Please refer to Figures 1 to 3. This embodiment discloses a ladle cover that supports the use of ladles of different sizes. The ladle cover includes a first cover body 1 and a second cover body 2. The second cover body 2 is detachably fitted onto the first cover body 1, which can increase the overall diameter of the ladle cover to support the use of ladles of different diameters. It covers the opening at the top of the ladle and provides insulation for the molten steel in the ladle below. The first cover body 1 is a hollow cylinder with an opening at the bottom, and the hollow interior of the first cover body 1 is filled with a first refractory material 3. A retaining ring 101 is protruding on the surface. The second cover 2 is circular. A first locking surface 201 corresponding to the retaining ring 101 is provided on the inner ring wall of the second cover 2. A sandwich structure 202 with an opening at the lower end is provided on the side wall of the second cover 2. The sandwich structure 202 is filled with a second refractory material 4. Several first insertion ports 102 are provided around the top edge of the first cover 1. A second insertion port 203 corresponding to the first insertion ports 102 is provided on the top surface of the second cover 2. A pin 5 is inserted into the first insertion port 102 and the second insertion port 203. Specifically, both the first cover 1 and the second cover 2 are made of 8-10mm thick ordinary steel plate or 1Cr18Ni9Ti heat-resistant steel. A lifting lug 10 is provided on the top surface of the first cover 1. A retaining ring 101 is fixed to the outer periphery of the first cover 1 by welding. Both the first refractory material 3 and the second refractory material 4 are cast from high-alumina castable, with a refractoriness of 1650℃. A locking bolt 6 is provided on the first socket 102 or the second socket 203. Rotating the locking bolt 6 can hold the pin 5 in place, preventing the pin 5 from moving or loosening within the first socket 102 and the second socket 203. In this embodiment, when it is necessary to increase the overall diameter of the ladle cover for use on ladles with larger diameters, the second cover 2 is inserted from the top of the first cover 1. When the first locking surface 201 of the second cover 2 is locked onto the top surface of the retaining ring 101, the second cover 2 cannot continue to descend. At this time, the top surface of the second cover 2 is flush with the first cover 1, and the first insertion port 102 and the second insertion port 203 are aligned and fixed by inserting the pin 5. It can then be lifted onto the ladle for use by the lifting lug 10. This realizes the adaptation of the ladle cover to different diameters, improves the applicability of the ladle cover, and effectively reduces equipment investment and maintenance costs.

[0028] Example 2

[0029] This embodiment further optimizes the design of the second cover 2 based on embodiment 1 to improve durability. Referring to Figures 2 and 3, several anchoring nails 204 are horizontally arranged within the sandwich structure 202. The height of the inner wall of the sandwich structure 202 is less than the height of the outer wall, and the second refractory material 4 covers the bottom end of the inner wall of the sandwich structure 202. The bottom end of the outer wall of the sandwich structure 202 is provided with a rounded chamfer 205. The anchoring nail 204 enables the second refractory material 4 to be better fixed inside the sandwich structure 202. The height of the inner wall of the sandwich structure 202 is smaller than the height of the outer wall, which facilitates the second refractory material 4 to cover the bottom of the inner wall of the sandwich structure 202, preventing the bottom of the inner wall from being exposed and directly contacting the molten steel in the ladle, thus preventing the inner wall of the sandwich structure 202 from being easily corroded and affecting its service life. When the ladle cover is hoisted to the top of the ladle, the bottom of the outer wall of the sandwich structure 202 will align and contact with the top shell of the ladle for closing. The bottom of the outer wall of the sandwich structure 202 is rounded and chamfered 205 towards the center to form a conical guide surface. When using the ladle cover of this embodiment, the positional deviation can be automatically corrected, shortening the closing operation time of the ladle cover.

[0030] Example 3

[0031] This embodiment further optimizes the design of the first cover 1 based on Embodiment 1 to improve durability. Referring to Figures 2 and 4, by covering the bottom end of the sidewall of the first cover 1 with the first refractory material 3, direct exposure of the sidewall of the first cover 1 to molten steel and prevent corrosion is avoided. An annular refractory brick 7 is fitted onto the outer circumference of the first cover 1 below the retaining ring 101, thus preventing the outer circumference of the first cover 1 from being exposed to molten steel. Several through holes 103 are horizontally formed around the sidewall of the first cover 1, and anchor rods 104 are inserted into the through holes 103. One end of the anchor rod 104... The first cover 1 extends into the hollow area inside, and the other end extends to the outer circumference of the first cover 1, so that the annular refractory brick 7 is inserted and fixed on the anchor rod 104. The anchor rod 104 serves to fix the first refractory material 3 on one end and fix the annular refractory brick 7 on the other end. The annular refractory brick 7 is made of corundum annular refractory brick, which has high wear resistance and impact resistance. When the first cover 1 is used alone, the part of the annular refractory brick 7 will be squeezed by the edge of the ladle, so it needs to have high impact resistance, which can further improve the durability of the first cover 1.

[0032] Example 4

[0033] This embodiment adds a sleeve 8 to the existing embodiment 3. When the first cover 1 is used alone, the sleeve 8 wraps around the bottom edge of the first cover 1, preventing the annular refractory brick 7 from directly contacting the top of the ladle and affecting its service life. Please refer to Figures 4 and 5. The ladle cover in this embodiment also includes a sleeve 8, which is annular in shape. A second locking surface 801 corresponding to the bottom end of the annular refractory brick 7 is provided on the side wall of the sleeve 8. A fixing hole 802 is provided on the side wall of the sleeve 8. A threaded hole 105 corresponding to the fixing hole 802 is provided on the outer circumferential surface of the retaining ring 101. Fixing bolts 9 are provided in the fixing hole 802 and the threaded hole 105. A rounded chamfer 205 is provided at the bottom end of the sleeve 8. When the ladle cover needs to be hoisted onto a smaller diameter ladle, the second cover 2 is removed, and the sleeve 8 is placed from bottom to top over the bottom of the first cover 1. After the second locking surface 801 abuts against the bottom end of the annular refractory brick 7, the sleeve 8 cannot move further upward. After aligning the fixing hole 802 and the threaded hole 105, the fixing bolt 9 is screwed in for fixation, so that the bottom end and outer periphery of the annular refractory brick 7 are both wrapped by the sleeve 8. The sleeve 8 is made of ordinary steel plate or 1Cr18Ni9Ti heat-resistant steel. When the first cover 1 is used alone, the sleeve 8 abuts against the top edge of the ladle to protect the annular refractory brick 7, preventing the annular refractory brick 7 from directly contacting the ladle and easily causing wear. Moreover, the bottom end of the sleeve 8 is rounded and chamfered 205 towards the center to form a conical guide surface. When using the ladle cover of this embodiment, it can automatically correct positional deviations and shorten the ladle cover closing operation time.

[0034] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A ladle cover that supports the use of ladles of different sizes, characterized in that: The device includes a first cover and a second cover. The second cover is detachably mounted on the first cover. The first cover is a hollow cylinder with an open bottom, and its hollow interior is filled with a first refractory material. A retaining ring is protruding on the outer circumference of the first cover. The second cover is annular, and its inner wall has a first locking surface corresponding to the retaining ring. The side wall of the second cover has a sandwich structure with an open bottom, and the sandwich structure is filled with a second refractory material. Several first insertion ports are provided around the top edge of the first cover, and the top surface of the second cover has a second insertion port corresponding to the first insertion ports. Pins are inserted into the first and second insertion ports.

2. The ladle cover as described in claim 1, characterized in that: The first or second socket is equipped with a locking bolt.

3. The ladle cover of claim 1, wherein: Several anchor bolts are horizontally installed inside the sandwich structure.

4. The ladle cover of claim 3, wherein: The height of the inner wall of the sandwich structure is less than the height of the outer wall, and the second refractory material covers the bottom end of the inner wall of the sandwich structure.

5. The ladle cover of claim 4, wherein: The bottom of the outer wall of the sandwich structure is rounded.

6. The ladle cover as described in claim 1, characterized in that: The first refractory material covers the bottom end of the side wall of the first cover, and an annular refractory brick is fitted on the outer peripheral surface of the first cover on the side below the retaining ring.

7. The ladle cover of claim 6, wherein: Several through holes are horizontally opened around the side wall of the first cover. Anchor rods are inserted into the through holes. One end of the anchor rod extends into the hollow area inside the first cover, and the other end extends to the outer circumference of the first cover, so that the annular refractory brick is inserted and fixed on the anchor rod.

8. The ladle cover as described in claim 7, characterized in that: It also includes a sleeve, which is annular in shape. The side wall of the sleeve is provided with a second locking surface corresponding to the bottom end of the annular refractory brick. The side wall of the sleeve is provided with a fixing hole. The outer circumferential surface of the retaining ring is provided with a threaded hole corresponding to the fixing hole. Fixing bolts are provided in the fixing hole and the threaded hole.

9. The ladle cover as described in claim 8, characterized in that: The bottom of the sleeve is rounded and chamfered.

10. The ladle cover as described in any one of claims 1 to 9, characterized in that: The top surface of the first cover is provided with lifting lugs.

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