Blast furnace tuyere water jacket fixing assembly

Abstract

The utility model discloses a blast-furnace tuyere water jacket fixing assembly, belongs to the technical field of blast-furnace tuyere water jackets, and solves the problem of high-temperature gas leakage caused by tension fracture of a welding part of a sealing steel ring due to displacement of a tuyere water jacket. The blast-furnace tuyere water jacket fixing assembly comprises a tuyere large jacket and a tuyere medium jacket, a sealing steel ring is welded to the inner side of the tuyere large jacket, the inner side of the sealing steel ring is welded to the tuyere medium jacket, the blast-furnace tuyere water jacket fixing assembly further comprises an L-shaped pressing piece, a positioning block is arranged at one end of the pressing piece, and the positioning block is fixed to the tuyere large jacket. A positioning groove matched with the positioning block is formed in the inner side of the tuyere large sleeve, a threaded hole is formed in the other end of the pressing piece, a bolt is connected into the threaded hole in a threaded mode, and the end face of the bolt makes contact with the end face of the tuyere middle sleeve. According to the blast furnace tuyere water jacket fixing assembly, the accidents that high-temperature coal gas flows out to burn out equipment and cause gas poisoning are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace tuyere water jackets, and more specifically, to a blast furnace tuyere water jacket fixing component. Background Art

[0002] The existing installation process of the tuyere water jacket of the blast furnace air supply device generally adopts welding to fix the seal, such as Figure 1 As shown, after the sealing steel ring 9 is embedded in the steel tuyere sleeve 1, the sealing steel ring 9 is welded to the steel tuyere sleeve 1, and then the copper tuyere sleeve 3 is embedded in the middle tuyere sleeve 2, and the small tuyere sleeve 3 is connected to the straight blowing pipe of the air supply device by a tie rod and tightened to achieve fixed sealing. However, the tuyere water jacket is relatively weak when it is welded and fixed by the sealing steel ring alone. It cannot withstand the physical impact of the slag skin falling off in the furnace and the rising and falling of the tuyere composite bricks during the smelting process, which will cause cracks in the welding of the sealing steel ring and cause leakage of high-temperature coal gas, resulting in high-temperature coal gas burning equipment and coal gas poisoning accidents. Therefore, it is urgent to develop and design a tuyere water jacket fixing component. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a blast furnace tuyere water jacket fixing component in view of the above-mentioned deficiencies in the prior art, and to improve the ability of the tuyere water jacket to withstand physical impact in the furnace by adding the fixing component, so as to prevent the high-temperature coal gas from escaping and burning equipment and causing coal gas poisoning accidents.

[0004] The technical solution of the utility model is as follows: a blast furnace tuyere water jacket fixing assembly, comprising a large tuyere sleeve and a middle tuyere sleeve, a sealing steel ring is welded on the inner side of the large tuyere sleeve, the inner side of the sealing steel ring is welded to the middle tuyere sleeve, and also comprises a clamping piece, the clamping piece is "L"-shaped, a positioning block is provided at one end of the clamping piece, a positioning groove adapted to the positioning block is provided on the inner side of the large tuyere sleeve, a threaded hole is provided at the other end of the clamping piece, a bolt is threadedly connected to the inner thread of the threaded hole, and the end face of the bolt contacts the end face of the middle tuyere sleeve.

[0005] As a further improvement, the clamping member is made of carbon steel plate, and the thickness of the clamping member is 50 mm.

[0006] Furthermore, there are four pressing pieces in total, and the four pressing pieces are evenly distributed on the inner side of the large air outlet sleeve.

[0007] Furthermore, the positioning block is a cylinder, the diameter of the positioning block is 50 mm, and the length of the positioning block is 30 mm.

[0008] Furthermore, the threaded hole is M48, and the specification of the bolt is M48*200.

[0009] Furthermore, a reinforcing plate is provided at the right-angle corner of the pressing member.

[0010] Furthermore, the positioning block, the pressing piece and the reinforcing plate are an integrated structure.

[0011] Furthermore, a fixing groove is provided on the end surface of the air port sleeve, and one end of the bolt is inserted into the fixing groove.

[0012] Beneficial Effects

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. The utility model provides a blast furnace tuyere water jacket fixing component, which adds a set of fixing components to the original tuyere water jacket of the air supply device. The fixing component is positioned and fixed by a positioning block and the tuyere middle jacket is compressed by bolts, thereby improving the ability of the tuyere water jacket to withstand physical impact in the furnace. The fixing component is easy to manufacture, easy to disassemble and assemble, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a left-view cross-sectional structural schematic diagram of the prior art;

[0016] Figure 2 It is an enlarged schematic diagram of the structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the utility model when in use;

[0018] Figure 4 It is a schematic diagram of the left side cross-sectional structure when the utility model is used;

[0019] Figure 5 for Figure 4 A is a magnified schematic diagram of the structure;

[0020] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of B.

[0021] Among them: 1-large air outlet sleeve, 2-medium air outlet sleeve, 3-small air outlet sleeve, 4-clamping piece, 5-positioning block, 6-positioning groove, 7-bolt hole, 8-bolt, 9-sealing steel ring, 10-reinforcement plate, 11-fixing groove. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0023] See also Figure 2-5A blast furnace tuyere water jacket fixing assembly, including a tuyere large sleeve 1, a tuyere middle sleeve 2, a sealing steel ring 9 is welded on the inner side of the tuyere large sleeve 1, and the inner side of the sealing steel ring 9 is welded to the tuyere middle sleeve 2, and also includes a clamping piece 4, the clamping piece 4 is "L" shaped, one end of the clamping piece 4 is provided with a positioning block 5, the inner side of the tuyere large sleeve 1 is provided with a positioning groove 6 adapted to the positioning block 5, the positioning block 5 is inserted in the positioning groove 6 to position and fix the clamping piece 4; the other end of the clamping piece 4 is provided with a threaded hole 7, the screw The inner thread of the hole 7 is connected with a bolt 8, and the end face of the bolt 8 contacts the end face of the tuyere sleeve 2; the positioning block 5 is inserted in the positioning groove 6, and the bolt 8 on the clamping piece 4 is tightened so that one end of the bolt 8 is inserted in the fixing groove 11. At this time, the bolt 8 presses the tuyere sleeve 2 to prevent the tuyere sleeve from rising and moving down during the smelting process, thereby causing cracks at the welding of the sealing steel ring 9, which can effectively improve the ability of the tuyere water jacket to withstand physical impact, prevent high-temperature coal gas from escaping and burning equipment, and prevent coal gas poisoning incidents.

[0024] In this embodiment, the clamping member 4 is made of carbon steel plate, and the thickness of the clamping member 4 is 50 mm. The raw material of carbon steel is very common and easy to obtain. The use of carbon steel plate to make the clamping member 4 reduces the production cost, and the carbon steel can obtain a higher hardness after heat treatment.

[0025] In this embodiment, there are four clamping members 4, which are evenly distributed on the inner side of the large tuyere sleeve 1. In other embodiments, there may be five, six, etc. clamping members 4. The ability of the tuyere water sleeve to withstand physical impact can be improved by increasing the number of clamping members 4.

[0026] In this embodiment, the positioning block 5 is a cylinder, and the corresponding positioning groove 6 is also cylindrical. An impact drill is used to punch the positioning groove 6 on the inner side of the tuyere sleeve 1. The cylindrical positioning groove 6 is easier to punch. The diameter of the positioning block 5 is 50 mm, and the length of the positioning block 5 is 30 mm.

[0027] In this embodiment, the threaded hole 7 is M48, and the specification of the bolt 8 is M48*200. In other embodiments, the bolt and the threaded hole may adopt different specifications and sizes.

[0028] In this embodiment, a reinforcing plate 10 is provided at the right-angle corner of the pressing member 4 , and the positioning block 5 , the pressing member 4 , and the reinforcing plate 10 are an integrated structure to enhance the overall structural strength of the pressing member 4 .

[0029] In this embodiment, a fixing groove 11 is provided on the end face of the middle air vent sleeve 2, and one end of the bolt 8 is inserted into the fixing groove 11. After the bolt 8 is tightened, it is inserted into the fixing groove 11, and the clamping member 4 can be fixedly installed on the inner side of the large air vent sleeve 1.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A blast furnace tuyere water jacket fixing assembly, comprising a large tuyere jacket (1) and a middle tuyere jacket (2), wherein a sealing steel ring (9) is welded to the inner side of the large tuyere jacket (1), and the inner side of the sealing steel ring (9) is welded to the middle tuyere jacket (2), characterized in that: The invention also comprises a clamping piece (4), the clamping piece (4) being in an "L" shape, a positioning block (5) being provided at one end of the clamping piece (4), a positioning groove (6) being adapted to the positioning block (5) being provided on the inner side of the large air outlet sleeve (1), a threaded hole (7) being provided at the other end of the clamping piece (4), a bolt (8) being connected to the inner thread of the threaded hole (7), and an end face of the bolt (8) being in contact with an end face of the middle air outlet sleeve (2).

2. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: The pressing piece (4) is made of carbon steel plate, and the thickness of the pressing piece (4) is 50 mm.

3. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: There are four pressing pieces (4) in total, and the four pressing pieces (4) are evenly distributed on the inner side of the large air outlet sleeve (1).

4. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: The positioning block (5) is a cylinder, the diameter of the positioning block (5) is 50 mm, and the length of the positioning block (5) is 30 mm.

5. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: The threaded hole (7) is M48, and the specification of the bolt (8) is M48*200.

6. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: A reinforcing plate (10) is provided at the right-angle corner of the pressing piece (4).

7. A blast furnace tuyere water jacket fixing assembly according to claim 6, characterized in that: The positioning block (5), the pressing piece (4) and the reinforcing plate (10) are an integrated structure.

8. A blast furnace tuyere water jacket fixing assembly according to claim 1, characterized in that: The end surface of the air port middle sleeve (2) is provided with a fixing groove (11), and one end of the bolt (8) is inserted into the fixing groove (11).

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