Sealing device for blast furnace

Abstract

The utility model relates to the technical field of blast furnaces, and particularly discloses a sealing device for a blast furnace, which comprises a furnace shell, a mounting hole is arranged on the outer wall of the furnace shell in a penetrating manner, a cooling water pipe is arranged on the inner wall of the mounting hole, a protective sleeve is arranged on the outer wall of the cooling water pipe, a fixing ring is arranged on the outer wall of the protective sleeve, and the outer wall of the fixing ring is welded on the inner wall of the mounting hole. A groove is formed in the inner wall of the fixing ring, the inner wall of the fixing ring is welded to the protective sleeve through the groove, a first sealing cap is welded to the outer wall of the fixing ring, a first through hole welded to the outer wall of the cooling water pipe is formed in the outer wall of the first sealing cap in a penetrating mode, and the first sealing cap is welded to the cooling water pipe through a second sealing cap. The sealing gasket is bonded with the furnace shell, so that the sealing performance between the protective sleeve and the furnace shell can be further improved, and in conclusion, the purposes of adding multiple layers of conversion media at the contact position of the cooling water pipe and the furnace shell and enhancing the sealing effect are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a blast furnace technical field, concretely is a sealing device for blast furnace. BACKGROUND

[0002] The blast furnace is ironmaking equipment, and is the first process of steel smelting. Iron ore must be smelted by the blast furnace to obtain pig iron blocks for various purposes or molten iron for steelmaking. The blast furnace shell is a steel plate, and the shell is lined with refractory bricks. There is cooling equipment between the shell and the refractory material. The blast furnace production process is the process of smelting iron ore into pig iron at high temperature. The blast furnace cooling water pipe is an important water cooling part of the blast furnace lining, which is installed at the blast furnace body, waist, belly, and hearth. The heat transferred in the blast furnace is smoothly guided out through cooling, avoiding the direct arrival of high-temperature heat flow on the shell, thereby effectively preventing the shell from being heated and red.

[0003] At present, the cooling water pipe used in the blast furnace is usually fixed on the shell by bolts. The cooling water pipe inside the cooling water pipe and the protective sleeve outside the cooling water pipe extend out of the shell. The gap between the shell and the protective sleeve of the cooling water pipe is firmly welded by welding process. During the production process of the blast furnace, under the action of high temperature, high pressure, and thermal stress, these welded parts may leak gas. After this situation occurs, grouting method is used to treat it to reduce the possibility of gas wandering, but it cannot be eliminated. Therefore, a sealing device for blast furnace is needed to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a sealing device for blast furnace, which has the characteristics of increasing multiple conversion media at the contact place of the cooling water pipe and the shell and strengthening the sealing effect.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a sealing device for blast furnace, including the shell, the outer wall of the shell is throughly provided with the mounting hole, the inner wall of the mounting hole is installed with the cooling water pipe, the outer wall of the cooling water pipe is installed with the protective sleeve, the outer wall of the protective sleeve is provided with the fixed ring, the outer wall of the fixed ring is welded to the inner wall of the mounting hole, the inner wall of the fixed ring is provided with the bevel, the inner wall of the fixed ring is welded with the protective sleeve through the bevel;

[0006] The outer wall of the fixed ring is welded with the first sealing head, the outer wall of the first sealing head is throughly provided with the first through hole welded to the outer wall of the cooling water pipe;

[0007] The outer wall of the first sealing head is provided with the second sealing head, the right end of the second sealing head is fixedly connected with the sealing pad, and the outer wall of the second sealing head is throughly provided with the second through hole welded to the outer wall of the cooling water pipe.

[0008] In order to increase the support strength of the fixed ring, as a kind of sewage treatment with preliminary sedimentation separation device preferred, the fixed ring is made of 18mm-20mm thick steel plate, the outer diameter is 165mm, the inner diameter is 125mm, and the bevel is 5mm.

[0009] In order to increase the strength of the first sealing dome and the second sealing dome, as a kind of sewage treatment with preliminary sedimentation separation device preferred, the first sealing dome and the second sealing dome are made of seamless steel pipe with wall thickness of 6mm and outer diameter of 140mm, the steel plate thickness of the first sealing dome and the second sealing dome is 6mm, and the diameter of the first through hole and the second through hole is equal to the outer wall diameter of the cooling water pipe, which is 66mm.

[0010] In order to facilitate the adaptation of the inclination angle of the fixed ring, as a kind of sewage treatment with preliminary sedimentation separation device preferred, the right end of the first sealing dome and the second sealing dome is inclined, and the inclination angle is adapted to the inclination angle of the fixed ring.

[0011] In order to increase the sealing between the second sealing dome and the furnace shell, as a kind of sewage treatment with preliminary sedimentation separation device preferred, the right end of the sealing gasket abuts against the outer wall of the furnace shell.

[0012] In order to fill the gap generated by welding, as a kind of sewage treatment with preliminary sedimentation separation device preferred, the welding parts of the first sealing dome and the fixed ring and the cooling water pipe, the welding parts of the second sealing dome and the cooling water pipe, and the welding parts of the fixed ring and the furnace shell and the protective sleeve are coated with sealing glue.

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

[0014] The utility model discloses, through the fixed ring and the protective sleeve and the furnace shell welding, can primarily increase the sealing between the protective sleeve and the furnace shell, and the fixed ring plays the role of fixed support cooling water pipe, and the inner wall of the fixed ring is welded with the protective sleeve through the bevel, and it is favorable to increase the welding effect;

[0015] Through the welding of the first sealing dome and the cooling water pipe and the fixed ring, the sealing between the protective sleeve and the furnace shell can be further increased, and the deviation of the angle between the first sealing dome and the furnace shell is corrected by the mediation of the fixed ring, so that the connection between the protective sleeve and the furnace shell is more close.

[0016] Through the welding of the second sealing dome and the cooling water pipe, and the adhesion of the sealing gasket and the furnace shell, the sealing between the protective sleeve and the furnace shell can be further increased, and the sealing between the protective sleeve and the furnace shell can be further protected.

[0017] In summary, the purpose of increasing the multilayer conversion medium and strengthening the sealing effect at the contact place of the cooling water pipe and the furnace shell is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is the overall structural drawing of the utility model;

[0019] Fig. 2 It is the first sealing bung structural drawing of the utility model;

[0020] Fig. 3 It is the fixed ring structural drawing of the utility model;

[0021] Fig. 4 It is the sealing gasket structural drawing of the utility model.

[0022] In the drawing: 1, furnace shell; 2, cooling water pipe; 3, fixed ring; 4, first sealing bung; 5, protective sleeve; 6, second sealing bung; 7, mounting hole; 8, bevel; 9, first through hole; 10, second through hole; 11, sealing gasket. DETAILED DESCRIPTION

[0023] Please refer to Figs. 1 to 4 A sealing device for blast furnace, including furnace shell 1, the outer wall of furnace shell 1 is throughly provided with mounting hole 7, the inner wall of mounting hole 7 is installed with cooling water pipe 2, the outer wall of cooling water pipe 2 is installed with protective sleeve 5, the outer wall of protective sleeve 5 is provided with fixed ring 3, the outer wall of fixed ring 3 is welded to the inner wall of mounting hole 7, the inner wall of fixed ring 3 is provided with bevel 8, the inner wall of fixed ring 3 is welded with protective sleeve 5 through bevel 8;

[0024] The outer wall of fixed ring 3 is welded with first sealing bung 4, the outer wall of first sealing bung 4 is throughly provided with first through hole 9 welded to the outer wall of cooling water pipe 2;

[0025] The outer wall of first sealing bung 4 is provided with second sealing bung 6, the right end of second sealing bung 6 is fixedly connected with sealing gasket 11, the outer wall of second sealing bung 6 is throughly provided with second through hole 10 welded to the outer wall of cooling water pipe 2.

[0026] In the embodiment: through the welding of fixed ring 3 and protective sleeve 5 and furnace shell 1, the sealing property between protective sleeve 5 and furnace shell 1 can be initially increased, the inner wall of fixed ring 3 is welded with protective sleeve 5 through bevel 8, which is conducive to increasing the welding effect;

[0027] Through the welding of first sealing bung 4 and cooling water pipe 2 and fixed ring 3, the sealing property between protective sleeve 5 and furnace shell 1 can be further increased, and at the same time, by using the intermediary effect of fixed ring 3, the deviation of the angle between first sealing bung 4 and furnace shell 1 is corrected, so that the connection between protective sleeve 5 and furnace shell 1 is more closely;

[0028] The sealing between the protective sleeve 5 and the furnace shell 1 is further increased by welding the second sealing dome 6 with the cooling water pipe 2 and bonding the sealing gasket 11 with the furnace shell 1.

[0029] As a technical optimization scheme of the utility model, the fixed ring 3 is made of a 18mm-20mm thick steel plate, with an outer diameter of 165mm and an inner diameter of 125mm, and the bevel 8 is 5mm.

[0030] In the embodiment, the fixed ring 3 is made of a 18mm-20mm thick steel plate, which is conducive to increasing the support strength of the fixed ring 3.

[0031] As a technical optimization scheme of the utility model, the first sealing dome 4 and the second sealing dome 6 are both made of a seamless steel pipe with a wall thickness of 6mm and an outer diameter of 140mm, the steel plate thickness of the first sealing dome 4 and the second sealing dome 6 is 6mm, and the diameters of the first through hole 9 and the second through hole 10 are equal to the outer wall diameter of the cooling water pipe 2, which is 66mm.

[0032] In the embodiment, the first sealing dome 4 and the second sealing dome 6 are both made of a seamless steel pipe with a wall thickness of 6mm and an outer diameter of 140mm, which can increase the strength of the first sealing dome 4 and the second sealing dome 6, and the diameters of the first through hole 9 and the second through hole 10 are equal to the outer wall diameter of the cooling water pipe 2, which is 66mm, so that the first through hole 9 and the second through hole 10 can abut against the outer wall of the cooling water pipe 2.

[0033] As a technical optimization scheme of the utility model, the right ends of the first sealing dome 4 and the second sealing dome 6 are both inclined, and the inclination angle is adapted to the inclination angle of the fixed ring 3.

[0034] In the embodiment, the right ends of the first sealing dome 4 and the second sealing dome 6 are both inclined, which can conveniently adapt to the inclination angle of the fixed ring 3, so that it is more consistent with the characteristics of the furnace type of the furnace shell 1.

[0035] As a technical optimization scheme of the utility model, the right end of the sealing gasket 11 abuts against the outer wall of the furnace shell 1.

[0036] In the embodiment, the right end of the sealing gasket 11 abuts against the outer wall of the furnace shell 1, which can increase the sealing between the second sealing dome 6 and the furnace shell 1.

[0037] As a technical optimization scheme of the utility model, the welding parts of the first sealing dome 4 with the fixed ring 3 and the cooling water pipe 2, the welding parts of the second sealing dome 6 with the cooling water pipe 2, and the welding parts of the fixed ring 3 with the furnace shell 1 and the protective sleeve 5 are all coated with sealing glue.

[0038] In the embodiment: the sealing gap generated by the weld can be filled by the sealant, and the sealing area is increased.

[0039] Working principle: first, the fixed ring 3 is welded with the protective sleeve 5 and the furnace shell 1, which can preliminarily increase the sealing property between the protective sleeve 5 and the furnace shell 1; the inner wall of the fixed ring 3 is welded with the protective sleeve 5 through the bevel 8, which is beneficial to increase the welding effect;

[0040] The first sealing dome 4 is welded with the cooling water pipe 2 and the fixed ring 3, which can further increase the sealing property between the protective sleeve 5 and the furnace shell 1; meanwhile, by using the intermediary action of the fixed ring 3, the angle deviation between the first sealing dome 4 and the furnace shell 1 is corrected, so that the connection between the protective sleeve 5 and the furnace shell 1 is more compact;

[0041] The second sealing dome 6 is welded with the cooling water pipe 2, and the sealing gasket 11 is bonded with the furnace shell 1, which can further increase the sealing property between the protective sleeve 5 and the furnace shell 1, and can further protect the sealing property between the protective sleeve 5 and the furnace shell 1.

[0042] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A sealing device for blast furnace, comprising a furnace shell (1), an installation hole (7) is provided through the outer wall of the furnace shell (1), a cooling water pipe (2) is installed on the inner wall of the installation hole (7), and a protective sleeve (5) is installed on the outer wall of the cooling water pipe (2), characterized in that: The outer wall of the protective sleeve (5) is provided with a fixing ring (3), the outer wall of the fixing ring (3) is welded to the inner wall of the mounting hole (7), the inner wall of the fixing ring (3) is provided with a bevel (8), and the inner wall of the fixing ring (3) is welded to the protective sleeve (5) through the bevel (8); The outer wall of the fixing ring (3) is welded with a first sealing bung (4), and the outer wall of the first sealing bung (4) is provided with a first through hole (9) welded to the outer wall of the cooling water pipe (2); The outer wall of the first sealing bung (4) is sleeved with a second sealing bung (6), the right end of the second sealing bung (6) is fixedly connected with a sealing gasket (11), and the outer wall of the second sealing bung (6) is provided with a second through hole (10) welded to the outer wall of the cooling water pipe (2).

2. A sealing device for use in a blast furnace as claimed in claim 1, characterized in that: The fixing ring (3) is made of a steel plate with a thickness of 18mm-20mm, an outer diameter of 165mm, an inner diameter of 125mm, and a bevel (8) of 5mm.

3. A sealing device for use in a blast furnace as claimed in claim 1, characterized in that: The first sealing bung (4) and the second sealing bung (6) are both made of a seamless steel pipe with a wall thickness of 6mm and an outer diameter of 140mm, the steel plate thickness of the first sealing bung (4) and the second sealing bung (6) is 6mm, and the diameters of the first through hole (9) and the second through hole (10) are both equal to the outer wall diameter of the cooling water pipe (2), that is, 66mm.

4. A sealing device for use in a blast furnace as claimed in claim 1, characterized in that: The right end of the first sealing bung (4) and the second sealing bung (6) is provided with an inclined surface, and the inclination angle is matched with the inclination angle of the fixing ring (3).

5. A sealing device for use in a blast furnace as claimed in claim 1, characterized in that: The right end of the sealing gasket (11) abuts against the outer wall of the furnace shell (1).

6. A sealing device for use in a blast furnace as claimed in claim 1, characterized in that: The welding positions of the first sealing bung (4) and the fixing ring (3) and the cooling water pipe (2), the welding positions of the second sealing bung (6) and the cooling water pipe (2), and the welding positions of the fixing ring (3) and the furnace shell (1) and the protective sleeve (5) are all coated with sealing glue.

Images