Electrode protection sleeve for an electric arc furnace

Abstract

The utility model discloses an electrode protection cover for ore heating furnace, including upper protection cover and lower protection cover, upper protection cover and lower protection cover are pieced together along up and down direction, the upper protection cover is by a plurality of identical structure upper protection screen and is formed by the circumferential splicing, the lower protection cover is by a plurality of identical structure lower protection screen and is formed by the circumferential splicing, the upper protection screen includes upper outer side board, upper inner side board and the upper bottom plate of connecting upper outer side board and upper inner side board, and the first space is formed between upper outer side board and upper inner side board, and a plurality of longitudinal partition plates are equipped in the first space, the lower protection screen includes lower outer side board, lower inner side board and the lower bottom plate of connecting lower outer side board and lower inner side board, and lower outer side board, lower bottom plate and lower inner side board are the U shape structure of integral forming, and the lower protection screen is the U shape structure of integral forming in this application can effectively reduce the number of lower protection screen bottom weld, and the possible of lower protection screen bottom weld cracking is reduced.

Description

Technical Field

[0001] This utility model relates to the field of protection of submerged arc furnace electrodes, and in particular to an electrode protection sleeve for submerged arc furnaces. Background Technology

[0002] Electrode protective sleeves, also known as water-cooled protective sleeves, are used to protect electrodes and improve the working environment of conductive cylinder tiles or contact elements. Traditional protective sleeves are a single unit; if there is leakage or damage in a part, the entire protective sleeve needs to be replaced, which is costly. Chinese patent CN118999160A discloses a combined water-cooled protective screen with the same upper and lower diameters for the conductive area of ​​an electric furnace. This patent divides the protective screen (protective sleeve) into an upper protective screen and a lower protective screen, with the upper protective screen composed of multiple upper protective screen modules and the lower protective screen composed of multiple lower protective screen modules. This structure overcomes the problem of replacing the entire protective sleeve, and the technical features disclosed in this patent also ensure that the upper and lower protective screens have the same diameter, avoiding interference with other components during the movement of the protective screen. However, like traditional protective sleeves, this patent also has certain drawbacks, such as:

[0003] First, the bottom of the lower protective screen has a traditional welded structure with multiple weld seams and dry edges. The bottom of the lower protective screen is in contact with high temperatures for a long time, which can easily cause cracks or breakage, leading to water leakage and safety accidents.

[0004] Second: The protective screen is divided into S-shaped channels by partitions (horizontally or vertically) inside. During the welding process, the high welding stress of the partitions can cause deformation, which can also affect the normal use of the protective screen. Utility Model Content

[0005] The purpose of this invention is to provide an electrode protective sleeve for a submerged arc furnace.

[0006] The innovation of this utility model is as follows: the lower protective screen is an integrally formed U-shaped structure, which can effectively reduce the number of welds at the bottom of the lower protective screen and reduce the possibility of cracking of the welds at the bottom of the lower protective screen; the different thicknesses of the transverse partition and the longitudinal partition can prevent deformation caused by high welding stress during the welding process.

[0007] To achieve the aforementioned objectives, the technical solution of this utility model is as follows:

[0008] An electrode protective sleeve for a submerged arc furnace includes an upper protective sleeve and a lower protective sleeve, which are joined together vertically. The upper protective sleeve is composed of multiple identical upper protective screens joined circumferentially. The lower protective sleeve is composed of multiple identical lower protective screens joined circumferentially. Each upper protective screen includes an upper outer side plate, an upper inner side plate, and an upper bottom plate connecting the upper outer side plate and the upper inner side plate. A first space is formed between the upper outer side plate and the upper inner side plate. Multiple longitudinal partitions are provided within this first space, dividing it into multiple interconnected longitudinal channels. The upper protective screen has an upper water inlet pipe on one side of its top and an upper water outlet pipe on the other side. The width of the longitudinal water channel connected to the upper water inlet pipe is greater than that of other longitudinal water channels. The lower protective screen includes a lower outer side plate, a lower inner side plate, and a lower bottom plate connecting the lower outer side plate and the lower inner side plate. The lower outer side plate, the lower bottom plate, and the lower inner side plate are integrally formed into a U-shaped structure. A second space is formed between the lower outer side plate and the lower inner side plate. The second space is provided with multiple transverse partitions, which divide the second space into multiple interconnected transverse water channels. The thickness of the multiple transverse partitions in the lower protective screen is different.

[0009] Furthermore, the thicknesses of the multiple longitudinal partitions within the first space are different.

[0010] Furthermore, the height ratio of the upper protective screen to the lower protective screen is 2:1, 3:1, or 3:2.

[0011] Furthermore, the number of upper protective screens is 4 to 6, and the number of lower protective screens is 4 to 6.

[0012] The beneficial effects of this utility model are:

[0013] First: In this application, the lower outer side plate, lower bottom plate and lower inner side plate of the lower protective screen are integrally formed U-shaped structures. The integrally formed U-shaped structure can effectively reduce the number of welds at the bottom of the lower protective screen and reduce the possibility of weld cracking at the bottom of the lower protective screen.

[0014] Second: The upper protective cover of this application consists of several upper protective screens, and the lower protective cover consists of several lower protective screens. This structure has low maintenance and replacement costs and does not require replacing the entire protective cover.

[0015] Third: The transverse and longitudinal partitions in this application have different thicknesses, which can prevent deformation caused by high welding stress during the welding process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a side view of the lower protective screen.

[0018] Figure 3 This is the front view of the lower protection screen.

[0019] Figure 4 This is the front view of the top protective screen.

[0020] In the diagram: 10 is the upper protective sleeve, 11 is the upper protective screen, 11.1 is the upper outer side plate, 11.2 is the upper inner side plate, 11.3 is the upper bottom plate, 11.4 is the longitudinal partition, 12 is the longitudinal water channel, 13 is the upper water inlet pipe, 14 is the upper water outlet pipe, 20 is the lower protective sleeve, 21 is the lower protective screen, 21.1 is the lower outer side plate, 21.2 is the lower inner side plate, 21.3 is the lower bottom plate, 21.4 is the transverse partition, and 22 is the transverse water channel. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will now be clearly and completely described with reference to the accompanying drawings.

[0022] An electrode protective sleeve for a submerged arc furnace includes an upper protective sleeve 10 and a lower protective sleeve 20. The upper protective sleeve 10 and the lower protective sleeve 20 are joined together vertically. The upper protective sleeve 10 is composed of multiple upper protective screens 11 with identical structures joined together circumferentially. The lower protective sleeve 20 is composed of multiple lower protective screens 21 with identical structures joined together circumferentially. The upper protective screen 11 includes an upper outer side plate 11.1, an upper inner side plate 11.2, and an upper bottom plate 11.3 connecting the upper outer side plate 11.1 and the upper inner side plate 11.2. A first space is formed between the upper outer side plate 11.1 and the upper inner side plate 11.2. The first space is provided with multiple longitudinal partitions 11.4, which divide the first space into multiple interconnected longitudinal channels 12. The top of the device has an upper water inlet pipe 13 on one side and an upper water outlet pipe 14 on the other side. The width of the longitudinal water channel 12 connected to the upper water inlet pipe 13 is greater than that of other longitudinal water channels 12. The lower protective screen 21 includes a lower outer side plate 21.1, a lower inner side plate 21.2, and a lower bottom plate 21.3 connecting the lower outer side plate 21.1 and the lower inner side plate 21.2. The lower outer side plate 21.1, the lower bottom plate 21.2, and the lower inner side plate 21.3 are integrally formed U-shaped structures. A second space is formed between the lower outer side plate 21.1 and the lower inner side plate 21.3. The second space is provided with multiple transverse partitions 21.4, which divide the second space into multiple interconnected transverse water channels 22. The thickness of the multiple transverse partitions 21.4 in the lower protective screen is different.

[0023] Furthermore, the U-shaped structure of the lower protective screen 21 can effectively reduce the number of welds at the bottom of the lower protective screen 21 and reduce the possibility of cracking of the welds at the bottom of the lower protective screen 21.

[0024] Furthermore, the thicknesses of the multiple longitudinal partitions 11.4 within the first space are different.

[0025] Furthermore, the different thicknesses of the transverse partition 21.4 and the different thicknesses of the longitudinal partition 11.4 can prevent deformation caused by high welding stress during the welding process.

[0026] Furthermore, in the lower protective screen 21, the horizontal partitions 21.4 are arranged from bottom to top, with odd-numbered partitions being thicker and even-numbered partitions being thinner, or the thickness of the partitions gradually decreasing from bottom to top.

[0027] Furthermore, in the upper protective screen 11, the longitudinal baffles 11.4 in the direction from the upper inlet 13 to the upper outlet 14 have a larger thickness for odd-numbered baffles and a smaller thickness for even-numbered baffles, or the thickness of the baffles gradually decreases.

[0028] Furthermore, in the upper protective screen 11, the width of the longitudinal water channel 12 connected to the upper water inlet pipe 13 is greater than that of other longitudinal water channels 12. This design forms a uniform flow structure to ensure the stability of the coolant. A similar structure can also be used in the transverse water channel 22.

[0029] Furthermore, the height ratio of the upper protective screen 11 to the lower protective screen 21 is 2:1, 3:1, or 3:2; during processing, the lower protective screen 21 is generally made of copper, and the upper protective screen 11 is made of stainless steel.

[0030] Furthermore, the number of upper protective screens 11 is 4 to 6, and the number of lower protective screens 21 is 4 to 6; the connection method between the upper protective screens 11 and the connection method between the upper protective screens 11 and the lower protective screens 21 are all existing technologies.

[0031] The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An electrode protective sleeve for a submerged arc furnace, comprising an upper protective sleeve (10) and a lower protective sleeve (20), wherein the upper protective sleeve (10) and the lower protective sleeve (20) are joined together in the vertical direction, characterized in that: The upper protective sleeve (10) is composed of multiple upper protective screens (11) with the same structure spliced ​​together in the circumferential direction; The lower protective sleeve (20) is composed of multiple lower protective screens (21) with the same structure spliced ​​together in the circumferential direction; The upper protective screen (11) includes an upper outer side plate (11.1), an upper inner side plate (11.2), and an upper bottom plate (11.3) connecting the upper outer side plate (11.1) and the upper inner side plate (11.2). A first space is formed between the upper outer side plate (11.1) and the upper inner side plate (11.2). A plurality of longitudinal partitions (11.4) are provided in the first space, and the plurality of longitudinal partitions (11.4) divide the first space into a plurality of interconnected longitudinal waterways (12). The upper protective screen (11) has an upper water inlet pipe (13) on one side of its top and an upper water outlet pipe (14) on the other side. The width of the longitudinal water channel (12) connected to the upper water inlet pipe (13) is greater than that of other longitudinal water channels (12). The lower protective screen (21) includes a lower outer side plate (21.1), a lower inner side plate (21.2), and a lower bottom plate (21.3) connecting the lower outer side plate (21.1) and the lower inner side plate (21.2). The lower outer side plate (21.1), the lower bottom plate (21.3), and the lower inner side plate (21.2) are integrally formed U-shaped structures. A second space is formed between the lower outer side plate (21.1) and the lower inner side plate (21.2). A plurality of transverse partitions (21.4) are provided in the second space. The plurality of transverse partitions (21.4) divide the second space into a plurality of interconnected transverse water channels (22). The thickness of the plurality of transverse partitions (21.4) in the lower protective screen is different.

2. The electrode protective sleeve for a submerged arc furnace according to claim 1, characterized in that: The thickness of the multiple longitudinal partitions (11.4) in the first space is different.

3. The electrode protective sleeve for a submerged arc furnace according to claim 1, characterized in that: The height ratio of the upper protective screen (11) to the lower protective screen (21) is 2:1, 3:1 or 3:

2.

4. An electrode protective sleeve for a submerged arc furnace according to claim 1 or 3, characterized in that: The number of the upper protective screen (11) is 4 to 6, and the number of the lower protective screen (21) is 4 to 6.

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