Device for preventing blast furnace tuyere small sleeve from drooping

Abstract

The utility model relates to the technical field of metallurgical blast furnace equipment, and discloses a device for preventing a blast furnace tuyere small sleeve from drooping, which comprises a fixed plate, a connecting plate is arranged on one side of the fixed plate, two threaded holes are arranged on one side of the fixed plate, an abutting groove is arranged on one side of the connecting plate, and two threaded holes are arranged on the other side of the connecting plate. Ejector rod bolts penetrate through the interiors of the two threaded holes correspondingly, the ejector rod bolts penetrate through the threaded holes and are connected with the interiors of the abutting grooves in an abutting mode, a fixed ejector rod is fixed to the side, away from the fixed plate, of the connecting plate, and the left end of the fixed ejector rod abuts against the tuyere small sleeve body. The outer side of the small tuyere sleeve body is sleeved with a middle tuyere sleeve body. According to the blast furnace tuyere small sleeve, the single fixing mode of the tuyere small sleeve body can be enhanced after improvement, and the phenomena of displacement and deformation of a sealing surface after the tuyere small sleeve body is smashed, air leakage and burning loss of a blast furnace air supply device and the like caused by slag crust falling in the blast furnace are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical blast furnace equipment, in particular to a device for preventing a blast furnace tuyere small sleeve from sagging. Background Art

[0002] A blast furnace is a closed container that withstands high temperature and high pressure. The theoretical combustion temperature in front of the tuyere can reach 2250-2350℃, and the pressure of the tuyere sleeve can reach 350-450KPa. Due to the airflow scouring the furnace wall, the slag skin of the furnace wall falls off and hits the outer edge of the tuyere, causing the tuyere sleeve to sag under force, which is a common situation in blast furnace production.

[0003] According to the Chinese patent with publication number: CN218860774U, a tuyere sleeve assembly for a blast furnace comprises a small tuyere sleeve body, a middle tuyere sleeve body and a large tuyere sleeve body which are inserted and sleeved with each other and have a conical structure; the small tuyere sleeve body is provided with two positioning brackets near the inner wall of the large tuyere sleeve body, each of the positioning brackets is installed with a supporting rod, and the end of the supporting rod extending out of the large tuyere sleeve body is provided with a transverse limit pin hole; two fixing blocks corresponding to the supporting rods are provided on the end surface of the large tuyere sleeve, and the upper end of the supporting rod passes through the threaded hole of the fixing block; a wedge-shaped pre-tightening pin is installed in the transverse limit pin hole on the upper surface of the fixing block.

[0004] In the above scheme, the small tuyere sleeve body is installed close to the large tuyere sleeve body, resulting in the following disadvantages: the fixing method of the small tuyere sleeve is single, and when slag falls off in the blast furnace, the small tuyere sleeve is easily smashed, causing the sealing surface to shift and deform, resulting in air leakage and burning of the blast furnace air supply device. Utility Model Content

[0005] The utility model aims to provide a device for preventing a blast furnace tuyere sleeve from sagging, so as to solve the problem that the tuyere sleeve is easily smashed when slag skin falls off in the blast furnace, causing the sealing surface to shift and deform, resulting in air leakage and burning of the blast furnace air supply device.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a device for preventing the blast furnace tuyere sleeve from sagging, comprising a fixing plate, a connecting plate is arranged on one side of the fixing plate, two threaded holes are provided on one side of the fixing plate, a resistance groove is provided on one side of the connecting plate, push rod bolts are respectively passed through the insides of the two threaded holes, the push rod bolts pass through the threaded holes and are connected in resistance with the insides of the resistance grooves, a fixed push rod is fixed on the side of the connecting plate away from the fixing plate, and the left end of the fixed push rod resists the tuyere sleeve body.

[0007] Preferably, an arc-shaped connecting block is fixed to one end of the fixed push rod, and the arc surface of the arc-shaped connecting block conflicts with the arc surface of the air outlet sleeve body.

[0008] Preferably, three triangular support plates are fixed to a side of the fixing plate away from the connecting plate, and the three triangular support plates respectively partition the two threaded holes.

[0009] Preferably, a detachable base is fixed to the bottom surface of the fixed plate, a fixed bottom plate is arranged below the detachable base, two connecting holes are provided on the top surface of the detachable base, two fixing holes are provided on the top surface of the fixed bottom plate, fixing bolts pass through the connecting holes, and the fixing bolts pass through the connecting holes and are threadedly connected to the fixing holes.

[0010] Preferably, a fixed base is fixed to the bottom surface of the fixed bottom plate.

[0011] Preferably, two fixing nuts are provided below the fixed base plate, and the two fixing nuts are respectively threadedly connected to portions of the two fixing bolts extending out of the fixed base plate.

[0012] Compared with the prior art, a device for preventing the tuyere sleeve of a blast furnace from sagging by adopting the above technical solution has the following beneficial effects:

[0013] 1. Before use, the staff installs a fixed base on the outside of the furnace shell, and uses fixing bolts to install the removable base on the upper part of the fixed base;

[0014] During use, the arc-shaped connecting block is pressed against the lower part of the tuyere sleeve body. At this time, the staff can rotate the push rod bolt, and one end of the push rod bolt will abut against the abutment groove. The push rod bolt is used to fix the fixed push rod between the tuyere sleeve body and the fixed plate, providing a mechanical stop for the lower part of the tuyere sleeve body. For example, when the slag skin in the blast furnace falls off and hits the front end of the tuyere sleeve body, the non-working surface of the tuyere sleeve body will be upturned and will act on the fixed push rod. Under the action of the fixed push rod, the sealing surface of the tuyere sleeve body and the air supply device will not be displaced, thereby preventing the tuyere sleeve body from sagging, avoiding the high temperature caused by the air leakage of the sealing surface and the burning through of the air supply device. After the improvement, the single fixing method of the tuyere sleeve body can be strengthened, and the slag skin in the blast furnace can be prevented, which will cause the sealing surface of the tuyere sleeve body to be displaced and deformed after being hit, and the blast furnace air supply device to be vented and burned.

[0015] During use, the two push rod bolts installed on the vertical surface of the detachable base can be used to adjust the tightness of the fixed push rod, and the triangular support plate is used to prevent the bolts from deviating when rotating;

[0016] 2. During use, by passing the fixing bolt through the connecting hole and threading it with the fixing hole, the detachable base can be effectively fixed to the fixed bottom plate, and it is also convenient to disassemble the detachable base. The fixed base is installed on the outside of the furnace shell to support the bottom of the non-working surface and make the fixed base more secure. After the fixing bolt is threadedly connected to the fixing hole, the fixing nut is threadedly connected to the part extending from the fixing hole, so that the fixing bolt is fixed more firmly, ensuring that the detachable base and the fixed bottom plate can be effectively fixed, and ensuring that the fixed plate will not shake during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0018] Figure 2 It is a schematic diagram of the disassembly of the embodiment.

[0019] Figure 3 It is an exploded schematic diagram of the positioning frame in the embodiment.

[0020] Figure 4 Schematic diagram of the explosion at the fixed plate in the embodiment.

[0021] In the figure: 1. fixing plate; 2. connecting plate; 3. threaded hole; 4. interference groove; 5. push rod bolt; 6. fixing push rod; 7. air outlet small sleeve body; 8. air outlet middle sleeve body; 9. arc-shaped connecting block; 10. fixing nut; 11. detachable base; 12. connecting hole; 13. fixing bolt; 14. triangular support plate; 15. fixing bottom plate; 16. fixing hole; 17. fixing base. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0023] like Figure 1-Figure 4 As shown, a device for preventing a blast furnace tuyere sleeve from sagging comprises a fixing plate 1, a connecting plate 2 is arranged on one side of the fixing plate 1, two threaded holes 3 are provided on one side of the fixing plate 1, a resistance groove 4 is provided on one side of the connecting plate 2, push rod bolts 5 are respectively penetrated inside the two threaded holes 3, the push rod bolts 5 penetrate through the threaded holes 3 and are connected in resistance with the inside of the resistance groove 4, a fixing push rod 6 is fixed on the side of the connecting plate 2 away from the fixing plate 1, the left end of the fixing push rod 6 resists against a tuyere sleeve body 7, a tuyere middle sleeve body 8 is sleeved on the outer side of the tuyere sleeve body 7, and the tuyere middle sleeve body 8 is an existing structure and is not described in detail here, three triangular support plates 14 are fixed on the side of the fixing plate 1 away from the connecting plate 2, the three triangular support plates 14 respectively separate the two threaded holes 3, an arc-shaped connecting block 9 is fixed on one end of the fixing push rod 6, and the arc surface of the arc-shaped connecting block 9 resists against the arc surface of the tuyere sleeve body 7.

[0024] Before use, the staff installs a fixed base 17 on the outside of the furnace shell, and uses the fixing bolts 13 to install the detachable base 11 on the upper part of the fixed base 17;

[0025] When the tuyere sleeve body 7 is in use, the arc connecting block 9 is pressed against the lower part of the tuyere sleeve body 7. At this time, the staff can rotate the push rod bolt 5, and one end of the push rod bolt 5 will contact the contact groove 4. The push rod bolt 5 is used to fix the fixed push rod 6 between the tuyere sleeve body 7 and the fixed plate 1, providing a mechanical stop for the lower part of the tuyere sleeve body 7. For example, when the slag skin in the blast furnace falls off and hits the front end of the tuyere sleeve body 7, the non-working surface of the tuyere sleeve body 7 will be raised and will act on the fixed push rod 6. Under the action of the fixed push rod 6, the sealing surface of the tuyere sleeve body 7 and the air supply device will not be displaced, thereby preventing the tuyere sleeve body 7 from sagging, avoiding the high temperature and burning of the air supply device caused by the air leakage of the sealing surface. After the improvement, the single fixing method of the tuyere sleeve body 7 can be strengthened to prevent the slag skin from falling off in the blast furnace, resulting in the displacement and deformation of the sealing surface after the tuyere sleeve body 7 is hit, and the blast furnace air supply device is vented and burned.

[0026] In use, the two push rod bolts 5 installed on the vertical surface of the detachable base 11 can be used to adjust the tightness of the fixed push rod 6, and the triangular support plate 14 is used to prevent the bolts from deviating when rotating.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, a detachable base 11 is fixed to the bottom surface of the fixed plate 1, a fixed base plate 15 is arranged below the detachable base 11, two connecting holes 12 are provided on the top surface of the detachable base 11, two fixing holes 16 are provided on the top surface of the fixed base plate 15, fixing bolts 13 are passed through the inside of the connecting holes 12, the fixing bolts 13 pass through the connecting holes 12 and are threadedly connected with the fixing holes 16, a fixed base 17 is fixed to the bottom surface of the fixed base plate 15, two fixing nuts 10 are arranged below the fixed base plate 15, and the two fixing nuts 10 are respectively threadedly connected with the parts of the two fixing bolts 13 extending out of the fixed base plate 15.

[0028] In use, by passing the fixing bolt 13 through the connecting hole 12 and threading it with the fixing hole 16, the detachable base 11 can be effectively fixed to the fixed bottom plate 15, and it is also convenient to disassemble the detachable base 11. The fixed base 17 is installed on the outer side of the furnace shell to support the bottom of the non-working surface and make the fixed base 17 more secure. After the fixing bolt 13 is threadedly connected to the fixing hole 16, the fixing nut 10 is threadedly connected to the part extending from the fixing hole 16, so that the fixing bolt 13 is fixed more firmly, ensuring that the detachable base 11 and the fixed bottom plate 15 can be effectively fixed, and ensuring that the fixed plate 1 will not shake during use.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for preventing a blast furnace tuyere sleeve from sagging, comprising a fixing plate (1), characterized in that: A connecting plate (2) is provided on one side of the fixing plate (1), two threaded holes (3) are provided on one side of the fixing plate (1), a resistance groove (4) is provided on one side of the connecting plate (2), a push rod bolt (5) is passed through the inside of the two threaded holes (3), the push rod bolt (5) passes through the threaded holes (3) and is connected to the inside of the resistance groove (4), a fixed push rod (6) is fixed on the side of the connecting plate (2) away from the fixing plate (1), and the left end of the fixed push rod (6) resists the air outlet sleeve body (7).

2. A device for preventing a blast furnace tuyere sleeve from sagging according to claim 1, characterized in that: An arc-shaped connecting block (9) is fixed to one end of the fixed top rod (6), and the arc surface of the arc-shaped connecting block (9) is in conflict with the arc surface of the air outlet sleeve body (7).

3. A device for preventing a blast furnace tuyere sleeve from sagging according to claim 1, characterized in that: Three triangular support plates (14) are fixed to one side of the fixing plate (1) away from the connecting plate (2), and the three triangular support plates (14) respectively partition the two threaded holes (3).

4. A device for preventing a blast furnace tuyere sleeve from sagging according to claim 1, characterized in that: A detachable base (11) is fixed to the bottom surface of the fixing plate (1), a fixed bottom plate (15) is arranged below the detachable base (11), two connecting holes (12) are provided on the top surface of the detachable base (11), two fixing holes (16) are provided on the top surface of the fixed bottom plate (15), fixing bolts (13) are passed through the inside of the connecting holes (12), and the fixing bolts (13) pass through the connecting holes (12) and are threadedly connected to the fixing holes (16).

5. A device for preventing a blast furnace tuyere sleeve from sagging according to claim 4, characterized in that: A fixed base (17) is fixed to the bottom surface of the fixed bottom plate (15).

6. A device for preventing a blast furnace tuyere sleeve from sagging according to claim 5, characterized in that: Two fixing nuts (10) are arranged below the fixing base plate (15), and the two fixing nuts (10) are respectively threadedly connected to the portions of the two fixing bolts (13) extending out of the fixing base plate (15).

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