Device for preventing the production of a dome in a blast furnace

Abstract

This utility model belongs to the field of blast furnace equipment in metallurgy and ironmaking, specifically relating to a device for preventing the blast furnace tuyeres from warping during production. It includes a tuyeres sleeve, with a large sleeve surface on the side closer to the large sleeve and a small sleeve surface on the side closer to the small sleeve. A threaded hole is formed on the large sleeve surface, and a threaded hole is formed on the small sleeve surface. A large reinforcing disc is fixedly connected to the end face of the large sleeve surface, and a small reinforcing disc is fixedly connected to the end face of the small sleeve surface. This device prevents the blast furnace tuyeres sleeve from warping during production by adding a large reinforcing disc and a small reinforcing disc to the large and small sleeve surfaces of the tuyeres sleeve, respectively, forming a double-end rigid support structure. Combined with the staggered layout of circumferentially distributed threaded holes and mounting holes, the overall bending stiffness of the tuyeres sleeve is improved. Under high-temperature conditions of 1200℃, the circumferential thermal deformation is significantly reduced, effectively preventing sealing failure caused by warping deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace equipment in metallurgy and ironmaking, specifically to a device for preventing the blast furnace inner sleeve from tilting upwards during production. Background Technology

[0002] In the iron and steel smelting industry, the tuyere sleeve is a core component connecting the main and secondary hot blast sleeves, and its reliability directly affects the stable operation of the blast furnace. With the increasing intensity of blast furnace smelting, the tuyere sleeve faces more severe high temperatures (1000-1300℃) and mechanical loads.

[0003] Currently, under the action of high temperature thermal stress, some ends of the blast furnace sleeve are prone to upward deformation (the deformation can reach 2.5-4.0mm), which leads to poor sealing of the sealing surface, hot air leakage, affects the stability of blast furnace blasting, and even requires frequent shutdown for maintenance. In view of this, we propose a device to prevent the blast furnace sleeve from warping during production. Utility Model Content

[0004] The main objective of this invention is to provide a device for preventing the blast furnace liner from tilting upwards during production, which can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention proposes a device for preventing the blast furnace inner sleeve from tilting upwards during production, comprising an inner sleeve for the tuyeres. The side of the inner sleeve closer to the outer sleeve is the large sleeve surface, and the side of the inner sleeve closer to the inner sleeve is the small sleeve surface. A threaded hole is provided on the large sleeve surface, and a threaded hole is provided on the small sleeve surface. A large reinforcing disc is fixedly connected to the end face of the large sleeve surface, and a small reinforcing disc is fixedly connected to the end face of the small sleeve surface.

[0006] Preferably, the large reinforcing plate has a positioning slot, which is used to cooperate with the positioning block on the blast furnace sleeve.

[0007] Preferably, the large reinforcing disc has eight mounting holes evenly distributed along its circumference.

[0008] Preferably, the large reinforcing disc has eight mounting holes evenly distributed along its circumference.

[0009] Preferably, the small reinforcing disc has eight mounting holes evenly distributed along its circumference.

[0010] Preferably, the small reinforcing disc has eight threaded holes evenly distributed along its circumference.

[0011] Preferably, the inner diameter of the small sleeve is larger than the inner diameter of the small reinforcing disc, and a guide block is fixedly connected to the side of the small reinforcing disc near the air outlet sleeve. The guide block has a stepped hole and is used to cooperate with the positioning groove on the air outlet sleeve.

[0012] This invention provides a device to prevent the blast furnace liner from tilting upwards during production. It has the following beneficial effects:

[0013] (1) The device for preventing the blast furnace sleeve from warping during production is formed by adding a large reinforcing plate and a small reinforcing plate to the large and small sleeve surfaces of the tuyer sleeve, respectively, to form a double-end rigid support structure. Combined with the staggered layout of the circumferentially distributed threaded holes and mounting holes, the overall bending stiffness of the tuyer sleeve is improved. Under the high temperature condition of 1200℃, the circumferential thermal deformation is significantly reduced, effectively preventing the sealing failure caused by warping deformation.

[0014] (2) The device for preventing the blast furnace inner sleeve from tilting upwards during production forms a dual positioning system through the guide slot of the large reinforcing plate and the guide block of the small reinforcing plate, which facilitates the installation of the inner sleeve of the tuyeres, the large sleeve of the tuyeres, and the small sleeve of the tuyeres, shortens the installation and positioning time, and significantly improves maintenance efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a cross-sectional view of the threaded hole one and threaded hole two parts of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the air vent sleeve and positioning groove of this utility model;

[0019] Figure 4 This is a cross-sectional view of the large reinforcing disc and the small reinforcing disc of this utility model.

[0020] The following are the reference numerals: 1. Air vent sleeve; 2. Large sleeve surface; 3. Small sleeve surface; 4. Threaded hole one; 5. Threaded hole two; 6. Large reinforcing plate; 7. Small reinforcing plate; 8. Positioning groove; 9. Mounting hole one; 10. Mounting hole two; 11. Mounting hole three; 12. Threaded hole three; 13. Guide block; 14. Stepped hole.

[0021] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1-4 This utility model proposes a device to prevent the tuyeres sleeve from tilting upwards during production. It includes a tuyeres sleeve 1, with the side of the tuyeres sleeve 1 closest to the large sleeve being the large sleeve surface 2, and the side of the tuyeres sleeve 1 closest to the small sleeve being the small sleeve surface 3. The large sleeve surface 2 has a first threaded hole 4, with eight threaded holes 4 evenly distributed around the circumference. The small sleeve surface 3 has a second threaded hole 5, with eight threaded holes 5 evenly distributed around the circumference. A large reinforcing disc 6 is fixedly connected to the end face of the large sleeve surface 2, and a small reinforcing disc 7 is fixedly connected to the end face of the small sleeve surface 3.

[0024] In this utility model, the large reinforcing plate 6 is provided with a positioning slot 8, which is used to cooperate with the positioning block on the blast furnace sleeve. The large reinforcing plate 6 has 8 mounting holes 9 evenly distributed around its circumference. The large reinforcing plate 6 is fixed to the tuyer sleeve 1 by using the mounting holes 9 and the threaded holes 4 with the fixing screws. The large reinforcing plate 6 also has 8 mounting holes 10 evenly distributed around its circumference. The mounting holes 10 can be used to cooperate with the threaded holes on the tuyer sleeve, which facilitates the fixing of the large reinforcing plate 6 to the tuyer sleeve. The mounting holes 9 are located on the inner side, and the mounting holes 10 are located on the outer side and are staggered.

[0025] Furthermore, the small reinforcing plate 7 has eight mounting holes 11 evenly distributed around its circumference. The small reinforcing plate 7 is fixed to the air outlet sleeve 1 by using the mounting holes 11 and the threaded holes 5 with the fixing screws. The small reinforcing plate 7 also has eight threaded holes 12 evenly distributed around its circumference. The threaded holes 12 are used to fix the small air outlet sleeve with the fixing screws. The threaded holes 12 are located on the inner side, and the mounting holes 11 are located on the outer side and are staggered. The inner diameter of the sleeve surface 3 is larger than the inner diameter of the small reinforcing plate 7. A guide block 13 is fixedly connected to the side of the small reinforcing plate 7 near the air outlet sleeve 1. The guide block 13 has a stepped hole 14. The guide block 13 is used to cooperate with the positioning groove on the air outlet sleeve. The inner diameter of the sleeve surface 3 is larger than the inner diameter of the small reinforcing plate 7. The radial difference between the two is 30mm, forming a positioning step, which provides a mounting surface for the air outlet sleeve.

[0026] It should be noted that the above electrical components are all existing technology products. Those skilled in the art should select, install and complete the circuit debugging work according to the needs of use to ensure that all electrical appliances can work normally. The components are all general standard parts or components known to those skilled in the art. Their structure and principle can be known by those skilled in the art through technical manuals or conventional experimental methods. No specific restrictions are made here.

[0027] In use, align the large reinforcing plate 6 of the tuyeres sleeve 1 with the blast furnace sleeve, so that the positioning slot 8 is fully engaged with the positioning block of the sleeve. At the same time, align the positioning slot of the small tuyeres sleeve with the guide block 13 on the small reinforcing plate 7. Use fixing screws to thread through mounting hole 1 9 and threaded hole 1 4 to fix the large reinforcing plate 6 to the tuyeres sleeve 1. Use fixing screws to thread through mounting hole 3 11 and threaded hole 2 5 to fix the small reinforcing plate 7 to the tuyeres sleeve 1, thus completing the fixing of the sleeve and the two end components.

[0028] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A device for preventing the tuyeres sleeve from tilting upwards during blast furnace production, comprising a tuyeres sleeve (1), characterized in that: The side of the vent sleeve (1) closest to the large sleeve is the large sleeve surface (2), and the side of the vent sleeve (1) closest to the small sleeve is the small sleeve surface (3). The large sleeve surface (2) has a threaded hole one (4), and the small sleeve surface (3) has a threaded hole two (5). A large reinforcing disc (6) is fixedly connected to the end face of the large sleeve surface (2), and a small reinforcing disc (7) is fixedly connected to the end face of the small sleeve surface (3).

2. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The large reinforcing plate (6) is provided with a positioning slot (8), which is used to cooperate with the positioning block on the blast furnace sleeve.

3. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The large reinforcing plate (6) has eight mounting holes (9) evenly distributed along its circumference.

4. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The large reinforcing plate (6) has eight mounting holes (10) evenly distributed along its circumference.

5. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The small reinforcing disc (7) has eight mounting holes (11) evenly distributed along its circumference.

6. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The small reinforcing disc (7) has eight threaded holes (12) evenly distributed along its circumference.

7. The device for preventing the blast furnace liner from tilting upwards during production, as described in claim 1, is characterized in that: The inner diameter of the small sleeve (3) is larger than the inner diameter of the small reinforcing plate (7). A guide block (13) is fixedly connected to the side of the small reinforcing plate (7) near the air vent sleeve (1). A stepped hole (14) is provided on the guide block (13).

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