Furnace nose with heat preservation device

Abstract

A furnace nose with a heat preservation device comprises a furnace nose body, the furnace nose body is a hollow cylindrical body with the upper end and the lower end open, a corresponding flange is arranged at the upper end opening of the furnace nose body, a fork-shaped block and a positioning block are arranged on the lower side of the flange, the inner side ends of the fork-shaped block and the positioning block are fixedly connected to the outer side wall of the furnace nose body, and a corresponding heat preservation structure is arranged on the furnace nose body. And a corresponding leading-in cylinder is arranged at the lower end of the furnace nose body. The heat preservation effect is better, the internal temperature is more uniform and constant, the zinc ash generation probability is lower, the product quality is better, the service life is longer, and the operation efficiency is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot-dip (aluminum) zinc, and particularly relates to a furnace nose with a heat preservation device for a (aluminum) zinc plating furnace. Background Art

[0002] With the increasingly severe competition situation in the steel industry, the research and development of high-value-added products is the main way for steel enterprises to get rid of the development dilemma. Hot-dip galvanized and its alloy products are one of the most common, effective and economical corrosion-resistant products in steel materials.

[0003] Taking hot-dip aluminum-zinc steel strip as an example, hot-dip aluminum-zinc can effectively enhance the appearance, corrosion resistance and durability of the steel strip surface. During its production process, the furnace nose is located at the connection of the high-temperature annealing furnace and the zinc pot. The steel strip to be hot-dip aluminum-zinc comes out of the heating furnace, passes through the furnace nose and then enters the aluminum-zinc liquid in the zinc pot for hot-dip aluminum-zinc operation. The internal state of the furnace nose plays a crucial role in the surface quality of the steel strip. However, due to the lack of heating equipment in the existing furnace nose, its internal temperature is unstable, which easily causes the zinc vapor evaporated from the zinc pot to condense into zinc ash on the inner wall of the furnace nose with relatively low temperature. As time goes by, the zinc ash gradually accumulates and will fall onto the surface of the running steel strip or the zinc liquid surface. The zinc ash on the zinc liquid surface will also stick to the steel strip surface when the steel strip enters the zinc liquid. The zinc ash on the steel strip surface will seriously affect the quality of hot-dip aluminum-zinc on its surface. Currently, the main methods are to use a zinc extraction pump or add a heating device in the furnace nose to reduce the zinc ash inside. However, the temperature of the hot-dip aluminum-zinc liquid is high and the corrosion is strong, so the effect of using a zinc extraction pump to remove zinc ash is not ideal. The use of a heating device on the inner wall of the furnace nose has an uneven heating effect, and its effect of reducing zinc ash is also not ideal. The above two methods do not well solve the problem that zinc ash affects the quality of hot-dip aluminum-zinc on the surface of the steel strip. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a furnace nose with a heat preservation device to solve the technical problem that the internal temperature of the existing furnace nose is unstable, which is easy to generate zinc ash, thus affecting the quality of hot-dip aluminum-zinc on the surface of the steel strip.

[0005] To achieve the above purpose, the specific technical solution of the utility model is as follows:

[0006] A furnace nose with a heat preservation device includes a furnace nose body. The furnace nose body is a cylindrical body with a hollow interior and openings at both the upper and lower ends. A corresponding flange is provided at the upper port of the furnace nose body. A fork-shaped block and a positioning block are provided below the flange, and the inner ends of both are fixedly connected to the outer wall of the furnace nose body. A corresponding heat preservation structure is provided on the furnace nose body, and a corresponding guiding cylinder is provided at the lower end of the furnace nose body.

[0007] Furthermore, the heat insulation structure includes an inner heat insulation structure and an outer heat insulation structure. The inner heat insulation structure is arranged inside the side wall of the nose body of the furnace, and the outer heat insulation structure is arranged outside the side wall of the nose body 1 of the furnace. The two respectively insulate the nose body of the furnace from the inside and outside.

[0008] Furthermore, the inner heat insulation structure includes an inner cylinder sleeved inside the nose body of the furnace. The inner cylinder corresponds to the inside of the nose body of the furnace. The inner cylinder includes a plurality of inner heat insulation side walls. The plurality of inner heat insulation side walls are sequentially and hermetically fixedly connected and combined into an inner cylinder corresponding to the nose body of the furnace and having openings at both the upper and lower ends. A corresponding spacer layer is provided between the inner cylinder and the nose body of the furnace. This spacer layer is an inner spacer layer. The upper end of the inner spacer layer is open, and the bottom is closed. The bottom is provided with a corresponding inner bottom layer. The outer end of the inner bottom layer is connected to the corresponding inner side wall of the nose body of the furnace, and the inner end is connected to the bottom end of the inner cylinder.

[0009] Furthermore, an inner heat insulation body is provided in the inner spacer layer, and the inner heat insulation body fills the entire inner spacer layer.

[0010] Furthermore, partition walls are provided in the inner spacer layer. The plurality of partition walls are evenly distributed in the inner spacer layer. The outer ends thereof are connected to the inner side wall of the nose body of the furnace, and the inner ends thereof are connected to the outer side wall of the inner cylinder. The partition walls divide the inner spacer layer into a plurality of independent units.

[0011] Furthermore, the outer heat insulation structure includes an outer cylinder sleeved outside the nose body of the furnace. The outer cylinder corresponds to the outside of the nose body of the furnace. The outer cylinder includes a plurality of outer heat insulation side walls. The plurality of outer heat insulation side walls are sequentially fixedly connected and combined into an outer cylinder corresponding to the nose body of the furnace. A corresponding spacer layer is provided between the outer cylinder and the nose body of the furnace. This spacer layer is an outer spacer layer. The upper end of the outer spacer layer is open and the bottom is closed. The bottom is provided with a corresponding outer bottom layer. The outer end of the outer bottom layer is connected to the bottom end of the outer cylinder, and the inner end is connected to the corresponding outer side wall of the nose body of the furnace.

[0012] Furthermore, an outer heat insulation body is provided in the outer spacer layer, and the outer heat insulation body fills the entire outer spacer layer.

[0013] Furthermore, the plurality of fork-shaped blocks are evenly distributed around the circumferential direction on the outer side wall of the nose body of the furnace. A corresponding pair of positioning blocks are provided on the same side of the nose body of the furnace. A plurality of corresponding reinforcing ribs are provided between the flange and the nose body of the furnace. The upper ends of the reinforcing ribs are connected to the bottom surface of the flange, and the inner ends are connected to the outer side wall of the nose body of the furnace. A lifting lug for hoisting is provided on the outer side wall of the nose body of the furnace.

[0014] Furthermore, the upper end of the inlet cylinder is correspondingly connected to the lower opening of the nose body of the furnace. The lower end of the inlet cylinder extends into the aluminum-zinc liquid in the corresponding zinc pot. The lower port of the inlet cylinder is inclined.

[0015] The internal space of the furnace nose with a heat preservation device of the utility model is smaller, the storage capacity of zinc vapor is lower, and its heat preservation effect is better. The temperature in the inner cavity of the furnace nose is more uniform and stable, thereby reducing the probability of zinc vapor condensing to form zinc ash in the furnace nose, reducing the generation of zinc ash, and effectively reducing the probability of zinc ash causing defects to the product, improving the quality of the product. Moreover, the service life of the furnace nose with a heat preservation device of the utility model is longer. The inclined design at the lower end makes the product pass through more smoothly, and its operation efficiency is higher, and higher economic benefits can be generated during production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the utility model;

[0017] Figure 2 is the utility model Figure 1 top view semi-sectional view;

[0018] Figure 3 is the utility model Figure 1 left view of the outer heat preservation structure in semi-section;

[0019] Figure 4 is a schematic diagram of the state when the utility model is in use;

[0020] Description of the reference numerals in the figures: 1. Furnace nose body; 11. Flange; 12. Fork-shaped block; 13. Positioning block; 14. Reinforcing rib; 15. Lifting lug; 2. Introduction cylinder; 3. Steel strip; 4. Zinc pot; 5. Heat preservation structure; 51. Inner cylinder; 52. Inner heat preservation body; 53. Inner layer bottom; 54. Outer cylinder; 55. Outer heat preservation body; 56. Outer layer bottom; 57. Partition wall. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to better understand the purpose, structure and function of the utility model, the following further describes in detail a furnace nose with a heat preservation device of the utility model with reference to the drawings.

[0022] As Figures 1-4As shown in the figure, the furnace nose with a heat preservation device of the utility model comprises a furnace nose body 1. The furnace nose body 1 is a cylindrical body with a hollow interior and openings at both the upper and lower ends. A corresponding flange 11 is provided at the upper port of the furnace nose body 1. A fork-shaped block 12 and a positioning block 13 for installation and positioning are provided on the lower side of the flange 11. The inner ends of both are fixedly connected to the outer wall of the furnace nose body 1. The upper surface of the fork-shaped block 12 is attached to the bottom surface of the flange 11, and the distance from the fork bottom to the outer wall of the furnace nose body 1 is greater than the distance from the outer end of the flange 11 to the outer wall of the furnace nose body 1. A plurality of fork-shaped blocks 12 are evenly distributed around the circumferential direction on the outer wall of the furnace nose body 1. A pair of corresponding positioning blocks 13 are provided on the same side surface of the furnace nose body 1. The upper end of the positioning block 13 protrudes from the upper end surface of the flange 11. A plurality of corresponding reinforcing ribs 14 are provided between the flange 11 and the furnace nose body 1. The upper end of the reinforcing rib 14 is connected to the bottom surface of the flange 11, and the inner end is connected to the outer wall of the furnace nose body 1. A lifting lug 15 is provided on the outer wall of the furnace nose body 1 for hoisting during its transportation and installation. In this embodiment, four lifting lugs 15 are provided on the outer wall of the furnace nose body 1 on the same side as the positioning block 13, and the four lifting lugs 15 are evenly distributed at the four corners of the outer wall of the furnace nose body 1 near the outer ring of the corresponding surface, so that the furnace nose can be hoisted more safely and stably. A corresponding heat preservation structure 5 is provided on the furnace nose body 1, and the heat preservation structure 5 makes the temperature change inside the furnace nose body 1 smaller and more stable. A corresponding guiding cylinder 2 is provided at the lower end of the furnace nose body 1, and the furnace nose body 1 extends into the corresponding zinc pot 4 through the guiding cylinder 2, so that the steel strip 3 to be aluminized zinc can enter the aluminum-zinc solution in the zinc pot 4 more conveniently.

[0023] The heat preservation structure 5 includes an inner heat preservation structure and an outer heat preservation structure. The inner heat preservation structure is arranged in the inner cavity of the nose body 1, and the outer heat preservation structure is arranged outside the nose body 1. The two respectively perform heat preservation on the nose body 1 from the inside and outside. The inner heat preservation structure includes an inner cylinder 51 and an inner heat preservation body 52. The inner cylinder 51 is sleeved inside the nose body 1 and corresponds to it inside the nose body 1. The inner cylinder 51 includes a plurality of inner heat preservation side walls. The plurality of inner heat preservation side walls are sequentially connected and combined into an inner cylinder 51 corresponding to the nose body 1 and opening at both the upper and lower ends. In this embodiment, the cross-section of the nose body 1 is rectangular, and the corresponding inner cylinder 51 includes four inner heat preservation side walls. Each inner heat preservation wall is parallel and corresponding to the side wall of the nose body 1 outside it. The corresponding side edges of two adjacent inner heat preservation walls are fixedly and hermetically connected. The four inner heat preservation side walls are sequentially connected and combined into an inner cylinder 51 with a rectangular cross-section. In this embodiment, two adjacent inner heat preservation walls are fixedly connected together by welding. There is a corresponding spacer layer between the inner cylinder 51 and the nose body 1. This spacer layer is an inner spacer layer. The upper end of the inner spacer layer is open and the bottom is closed. Its bottom is provided with a corresponding inner bottom layer 53. The outer end of the inner bottom layer 53 is connected to the corresponding inner side wall of the nose body 1, and its inner end is connected to the bottom end of the inner cylinder 51. The inner heat preservation body 52 is arranged in the inner spacer layer. In this embodiment, the material of the inner heat preservation body 52 is heat preservation rock wool, which fills the entire inner spacer layer. The inner heat preservation layer reduces the space inside the nose, making its heat dissipation area smaller. The design of the inner spacer layer plays a role in heat insulation inside the nose, thereby improving the heat preservation performance of the nose. The use of the inner heat preservation body 52 makes the heat preservation effect of the inner heat preservation layer better.

[0024] The outer heat preservation structure includes an outer cylinder 54 and an outer heat preservation body 55. The outer cylinder 54 is sleeved outside the nose body 1 and corresponds to the nose body 1 outside it. The outer cylinder 54 includes a plurality of outer heat preservation side walls. The plurality of outer heat preservation side walls are sequentially connected and combined into an outer cylinder 54 corresponding to the nose body 1. In this embodiment, the outer cylinder 54 includes four outer heat preservation side walls. Each outer heat preservation wall is parallel and corresponding to the side wall of the nose body 1 inside it. The corresponding side edges of two adjacent outer heat preservation walls are fixedly connected. The four outer heat preservation side walls are sequentially connected and combined into an outer cylinder 54 with a rectangular cross-section. In this embodiment, two adjacent outer heat preservation walls are fixedly connected together by welding. There is a corresponding spacer layer between the outer cylinder 54 and the nose body 1. This spacer layer is an outer spacer layer. The upper end of the outer spacer layer is open and the bottom is closed. Its bottom is provided with a corresponding outer bottom layer 56. The outer end of the outer bottom layer 56 is connected to the bottom end of the outer cylinder 54, and its inner end is connected to the corresponding outer side wall of the nose body 1. The outer heat preservation body 55 is arranged in the outer spacer layer. In this embodiment, the material of the outer heat preservation body 55 is also heat preservation rock wool, which fills the entire outer spacer layer. The outer heat preservation layer performs heat preservation on the nose from the outside, improving its heat preservation performance from the outside of the nose.

[0025] Further, a partition wall 57 is provided in the inner intermediate layer. A plurality of partition walls 57 are evenly distributed in the inner intermediate layer. The outer ends of the partition walls 57 are connected to the inner side wall of the nose body 1, and the inner ends thereof are connected to the outer side wall of the inner cylinder 51. The partition walls 57 divide the inner intermediate layer and the inner heat-insulating body 52 therein into a plurality of independent unit parts. Such a setting is more conducive to the repair and maintenance of the inner heat-insulating structure. When the wall of the inner cylinder 51 corresponding to one or several independent parts of the inner intermediate layer is damaged, the corresponding part of the inner heat-insulating body 52 is synchronously damaged. It is only necessary to maintain the damaged part of the inner cylinder 51 and its corresponding part of the inner heat-insulating body 52. The method of separating by the partition wall 57 can avoid the increase of the damage range, is more conducive to the repair after damage, and the method of separating into a plurality of independent units makes it easier to install the inner heat-insulating body 52.

[0026] Further, the upper end of the introduction cylinder 2 is correspondingly connected to the lower opening of the nose body 1. The lower end of the introduction cylinder 2 extends into the aluminum-zinc liquid in the corresponding zinc pot 4. The lower port of the introduction cylinder 2 is provided in an inclined shape. In this embodiment, when the nose body 1 is placed vertically, the two short sides corresponding to the lower port of the introduction cylinder 2 are parallel to each other, and form a certain angle with the horizontal plane. The two long sides do not lie in the same horizontal plane, and the two form an inclined plane with a certain angle with the horizontal plane. The nose is placed obliquely during installation, so that the lower end surface of the introduction cylinder 2 is parallel to the horizontal plane, so that the surface of the steel strip entering the zinc pot through the introduction cylinder 2 forms a certain angle with the horizontal plane, making it smoother for the steel strip to enter the aluminum-zinc liquid. As the steel strip continuously enters the zinc pot, it is easier for the front end of the steel strip to turn away from the zinc pot after being aluminized zinc, without affecting its performance, and the aluminized zinc effect is better.

[0027] During use, first, the nose is hoisted to the corresponding installation position through the lifting lugs 15, then the nose body 1 is cooperatively connected with the outlet of the corresponding heating furnace through the flange 11 at its upper opening, and the installation positioning is carried out with the heating furnace outlet through the positioning block 13. Finally, it is fixedly installed with the corresponding heating furnace through the fork-shaped block 12, and at the same time, the lower end of the introduction cylinder 2 below the nose body 1 extends into the aluminum-zinc liquid of the corresponding zinc pot 4. In this way, the installation of the nose is completed. At this time, the steel strip 3 to be aluminized zinc in the heating furnace can continuously enter the corresponding zinc pot through the nose, so as to immerse in the aluminum-zinc liquid, and then complete the hot-dip aluminized zinc on the surface of the steel strip. The steel strip after hot-dip aluminized zinc leaves from the other side of the zinc pot opposite to the nose. As the aluminized zinc steel strip continuously leaves, the subsequent new steel strip continuously enters the zinc pot through the nose, so that the aluminized zinc work of the steel strip forms a continuous production.

[0028] The furnace nose with a heat preservation device of the present utility model reduces the space of the inner cavity of the furnace nose through the inner heat preservation structure inside its side wall. The size of the inner cavity space of the furnace nose can be effectively controlled through the inner heat preservation structure, thereby reducing the contact area between the furnace nose and zinc vapor and the zinc vapor storage capacity inside the furnace nose. The combination of the inner heat preservation structure and the outer heat preservation structure 5 outside the side wall of the furnace nose effectively improves the heat preservation ability of the furnace nose, making the temperature stability inside it better, inhibiting the condensation of zinc vapor inside the furnace nose, effectively reducing the generation of zinc ash, thereby reducing the influence of zinc ash on the quality of hot-dip aluminized zinc on the surface of the steel strip 3, improving the product quality of the aluminized zinc steel strip 3. At the same time, it reduces the waste of hot-dip cladding metal, reduces the generation rate of unqualified parts, saves production resources, reduces production costs, and the heat preservation structure 5 forms protection on both the inside and outside sides of the furnace nose, effectively reducing the loss rate during its use and increasing the service life of the furnace nose, making its economic benefits better.

[0029] It can be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A furnace nose with a heat preservation device, characterized in that, It includes a nose body (1), the nose body (1) is a cylindrical body with a hollow interior and openings at both the upper and lower ends. A corresponding flange (11) is provided at the upper port of the nose body (1). A corresponding heat preservation structure (5) is provided on the nose body (1), and a corresponding inlet cylinder (2) is provided at the lower end of the nose body (1).

2. The furnace nose with a heat preservation device according to claim 1, characterized in that, The heat preservation structure (5) includes an inner heat preservation structure and an outer heat preservation structure. The inner heat preservation structure is arranged inside the side wall of the nose body (1), and the outer heat preservation structure is arranged outside the side wall of the nose body (1). The two respectively perform heat preservation on the nose body (1) from the inside and outside.

3. The furnace nose with a heat preservation device according to claim 2, characterized in that, The inner heat preservation structure includes an inner cylinder (51) sleeved inside the nose body (1). The inner cylinder (51) corresponds to the inside of the nose body (1). The inner cylinder (51) includes a plurality of inner heat preservation side walls, and the plurality of inner heat preservation side walls are sequentially and hermetically fixedly connected and combined into an inner cylinder (51) corresponding to the nose body (1) and having openings at both the upper and lower ends. A corresponding spacer layer is provided between the inner cylinder (51) and the nose body (1). This spacer layer is an inner spacer layer, the upper end of the inner spacer layer is open, the bottom is closed, and a corresponding inner bottom (53) is provided at the bottom. The outer end of the inner bottom (53) is connected to the corresponding inner side wall of the nose body (1), and the inner end is connected to the bottom end of the inner cylinder (51).

4. The furnace nose with a heat preservation device according to claim 3, characterized in that, An inner heat preservation body (52) is provided in the inner spacer layer, and the inner heat preservation body (52) fills the entire inner spacer layer.

5. The furnace nose with a heat preservation device according to claim 3, characterized in that, Partition walls (57) are provided in the inner spacer layer. A plurality of partition walls (57) are evenly distributed in the inner spacer layer. The outer ends thereof are connected to the inner side wall of the nose body (1), and the inner ends thereof are connected to the outer side wall of the inner cylinder (51). The partition walls (57) divide the inner spacer layer into a plurality of independent units.

6. The furnace nose with a heat preservation device according to claim 2, characterized in that, The outer heat preservation structure includes an outer cylinder (54) sleeved outside the nose body (1). The outer cylinder (54) corresponds to the outside of the nose body (1). The outer cylinder (54) includes a plurality of outer heat preservation side walls, and the plurality of outer heat preservation side walls are sequentially fixedly connected and combined into an outer cylinder (54) corresponding to the nose body (1). A corresponding spacer layer is provided between the outer cylinder (54) and the nose body (1). This spacer layer is an outer spacer layer, the upper end of the outer spacer layer is open and the bottom is closed, and a corresponding outer bottom (56) is provided at the bottom. The outer end of the outer bottom (56) is connected to the bottom end of the outer cylinder (54), and the inner end is connected to the corresponding outer side wall of the nose body (1).

7. The furnace nose with a heat preservation device according to claim 6, characterized in that, An outer heat preservation body (55) is provided in the outer spacer layer, and the outer heat preservation body (55) fills the entire outer spacer layer.

8. The furnace nose with a heat preservation device according to claim 1, wherein, A fork-shaped block (12) and a positioning block (13) are provided on the lower side of the flange (11). The inner ends of both are fixedly connected to the outer side wall of the nose body (1). A plurality of fork-shaped blocks (12) are evenly distributed around the circumferential direction on the outer side wall of the nose body (1). A pair of corresponding positioning blocks (13) are provided on the same side surface of the nose body (1). A plurality of corresponding reinforcing ribs (14) are provided between the flange (11) and the nose body (1). The upper ends of the reinforcing ribs (14) are connected to the bottom surface of the flange (11), and the inner ends are connected to the outer side wall of the nose body (1). A lifting lug (15) for hoisting is provided on the outer side wall of the nose body (1).

9. The furnace nose with a heat preservation device according to claim 1, characterized in that, The upper end of the introduction cylinder (2) is correspondingly connected to the lower opening of the nose body (1) of the furnace. The lower end of the introduction cylinder (2) extends into the aluminum-zinc liquid in the corresponding zinc pot (4), and the lower port of the introduction cylinder (2) is inclined.

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