Lock catch type hot air outlet structure

Abstract

The utility model relates to a lock catch type hot air outlet structure, which can effectively solve the problem that a hot blast stove cannot convey high hot air temperature due to frequent repair, brick replacement and grouting caused by damage at high temperature, and adopts the technical scheme that the lock catch type hot air outlet structure comprises a hot air outlet combination brick and a hot air branch pipe, the hot air outlet combination brick is composed of various types of special-shaped bricks, a first special-shaped brick serves as a mother brick, a cross-shaped meshing buckle is arranged on the brick-shaped side face of the first special-shaped brick, the first special-shaped brick formed by cross masonry in a whole-ring and semi-ring mode is built on the inner ring of the inner side of the center of the hot air outlet, no circular seam is arranged, and a second special-shaped brick is built on the other semi-ring. The overall combined brick structure is firm in mutual occlusion and high in stability, frequent repair, brick replacement and grouting are not needed, maintenance work is greatly relieved, ironmaking yield is increased, cost is reduced at the same time, and the hot air outlet structure is innovative.

Description

Technical Field

[0001] The utility model relates to the field of hot air furnaces, in particular to a lock-type hot air outlet structure. Background Art

[0002] As the air supply equipment of the blast furnace, the main function of the hot blast furnace is to send the high-temperature gas generated into the blast furnace through the hot blast duct. The hot blast outlet on the wall of the combustion chamber of the hot blast furnace is the only channel for hot blast delivery. The quality of its setting is also an important factor affecting the structural stability of the hot blast furnace. It is very common for problems to occur at the hot blast outlet of hot blast furnaces at home and abroad. Bricks often fall off and elliptical deformation often occur at the hot blast outlet, which leads to the collapse of the upper wall of the hot blast outlet, which obviously affects the service life of the hot blast furnace and the stable operation of the blast furnace. Experience shows that due to the many brick shapes and complex structures of the hot blast outlet composite bricks, and this part is in the harsh working conditions of high-pressure and high-temperature airflow for a long time, coupled with the "thermal shrinkage" and "thermal expansion" of the refractory material, the hot blast outlet composite bricks fall off and break, which is the main factor for the damage of the hot blast outlet composite bricks at high temperatures. This causes frequent repairs, brick replacement, grouting and other maintenance work, which makes the hot blast furnace unable to deliver high hot blast temperature, seriously restricting the ironmaking output and increasing the cost. The hot blast outlet of the hot blast furnace is the stress concentration point of the hot blast furnace structure and the weakest link of the hot blast furnace. The structure of this part must be properly handled. Therefore, it is imperative to invent a new hot blast outlet structure. Summary of the invention

[0003] In view of the above situation, in order to solve the defects of the prior art, the purpose of the utility model is to provide a lock-type hot air outlet structure, which can effectively solve the problem of frequent repairs, brick replacement, and grouting caused by damage under high temperature, making the hot air furnace unable to deliver high hot air temperature.

[0004] The technical solution solved by the utility model is that it comprises a hot air outlet composite brick and a hot air branch pipe, the hot air branch pipe is composed of a working layer and a thermal insulation layer, the hot air outlet composite brick is composed of various forms of special-shaped bricks, the first special-shaped brick is used as a mother brick, and a cross bite buckle is arranged on the brick side, the inner ring on the inner side of the center of the hot air outlet is built with a first special-shaped brick which is cross-laid in a whole ring plus a half ring manner, and no annular seam is arranged, and the other half ring is built with a second special-shaped brick, an thermal insulation layer is arranged on the outside of the first special-shaped brick, a whole ring of a third special-shaped brick is arranged on the outside of the second special-shaped brick, a working layer is arranged on the outside of the third special-shaped brick, and a half ring of a fourth special-shaped brick is laid on the contact part between the outer ring of the hot air outlet and the furnace shell.

[0005] The utility model has a novel structure and a reasonable design. The overall combined brick structure is firmly interlocked and has strong stability, so that the hot air outlet can operate stably under harsh working conditions without frequent repairs, brick replacements, and grouting, which greatly reduces the maintenance work. The hot air outlet temperature is stable, which increases the ironmaking output while reducing costs. It is an innovation in the hot air outlet structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the structural section of the utility model.

[0007] Figure 2 For this utility model Figure 1 AA cross-section diagram of .

[0008] Figure 3 For this utility model Figure 1 Schematic diagram of the BB cross section.

[0009] Figure 4 This is a schematic cross-sectional view of another hot air outlet structure of the utility model.

[0010] Figure 5 This is a schematic diagram of the first special-shaped brick structure of the present utility model.

[0011] Figure 6 This is a schematic diagram of the second special-shaped brick structure of the present utility model.

[0012] Figure 7 This is a schematic diagram of the third special-shaped brick structure of the present utility model.

[0013] Figure 8 This is a schematic diagram of the fourth special-shaped brick structure of the present utility model. DETAILED DESCRIPTION

[0014] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0015] Depend on Figure 1-8 The utility model comprises a hot air outlet composite brick and a hot air branch pipe 1, the hot air branch pipe 1 is composed of a working layer 2 and an insulation layer 3, the hot air outlet composite brick is composed of various forms of special-shaped bricks, the first special-shaped brick 5 is used as a mother brick, and a cross-engaging buckle is arranged on the brick side, the inner ring on the inner side of the center of the hot air outlet is built with a first special-shaped brick 5 which is cross-laid in a full ring plus a half ring manner, and no annular seam is arranged, and the other half ring is built with a second special-shaped brick 6, an insulation layer 3 is arranged on the outer side of the first special-shaped brick 5, a full ring of third special-shaped bricks 8 is arranged on the outer side of the second special-shaped brick 6, a working layer 2 is arranged on the outer side of the third special-shaped brick 8, and a half ring of fourth special-shaped bricks 7 are laid on the contact part between the outer ring of the hot air outlet and the furnace shell.

[0016] In order to ensure the use effect, a raised cross buckle is arranged on one side of the first special-shaped brick 5, and a recessed cross buckle matching the raised cross buckle is arranged on the other side.

[0017] The second special-shaped brick 6 is provided with a raised cross buckle on one side, a recessed cross buckle matching the raised cross buckle on the other side, and a wedge-shaped protrusion matching the wedge-shaped groove on the third special-shaped brick 8 on one end.

[0018] The third special-shaped brick 8 is provided with a protruding block on one side, a groove matching the protrusion on the other side, and a wedge-shaped groove matching the wedge-shaped protrusion on the second special-shaped brick 6 on one end.

[0019] The first special-shaped brick 5, the second special-shaped brick 6 and the third special-shaped brick 8 are all heavy refractory bricks.

[0020] The fourth special-shaped brick 7 is a lightweight refractory brick.

[0021] The first special-shaped brick 5, the second special-shaped brick 6, the third special-shaped brick 8 and the fourth special-shaped brick 7 are all wedge-shaped bricks that match each other.

[0022] The first fiber cotton 4 - 1 is filled between the fourth special-shaped brick 7 and the first special-shaped brick 5 .

[0023] The second special-shaped brick 6 and the third special-shaped brick 8 are filled with the second fiber cotton 4-2 to absorb the "thermal shrinkage" and "thermal expansion" of the refractory material.

[0024] The thermal insulation layer 3 is made of lightweight refractory bricks.

[0025] The working layer 2 is made of heavy refractory bricks.

[0026] The use of the utility model is that the hot air branch pipe 1 is composed of a working layer 2 and an insulation layer 3, and the hot air outlet composite bricks are composed of various forms of special-shaped bricks. The first special-shaped brick 5 is used as a mother brick, and a cross bite buckle is arranged on the side of the brick shape. The purpose is to allow the bricks to bite each other during masonry to make them a whole and increase the firmness of the hot air outlet. The inner ring on the inner side of the center of the hot air outlet is masonry with a first special-shaped brick 5 which is cross-laid in a full ring plus a half ring manner, and no annular seams are arranged. The cross bite buckles on the bricks are used to fix them, and the other half ring is masonry with a second special-shaped brick 6. A full ring of third special-shaped bricks 8 is arranged on the outer side of the second special-shaped brick 6. The second special-shaped brick 6 and the third special-shaped brick 8 are The brick 8 is fixed in the form of a bite hook, and the second fiber cotton 4-2 is filled between the second special-shaped brick 6 and the third special-shaped brick 8 to absorb the "thermal shrinkage" and "thermal expansion" of the refractory material. A half ring of the fourth special-shaped brick 7 is built at the contact point between the outer ring of the hot air outlet and the furnace shell. Its function is to bear the pressure of part of the upper refractory material and to provide insulation between the upper half of the hot air outlet and the furnace shell. The first fiber cotton 4-1 is arranged between the fourth special-shaped brick 7 and the first special-shaped brick 5, and a gap is set to absorb the expansion to ensure that the hot air outlet has enough expansion space. The overall combined brick structure is firmly interlocked with each other to enhance its stability and meet the stable operation of the hot air outlet under harsh working conditions.

[0027] The utility model has a novel structure and a reasonable design. The overall combined brick structure is firmly interlocked and has strong stability, so that the hot air outlet can operate stably under harsh working conditions without frequent repairs, brick replacement and grouting, which greatly reduces the maintenance work. The hot air outlet temperature is stable, which increases the ironmaking output while reducing the cost. It is an innovation in the hot air outlet structure and has good economic and social benefits.

[0028] It should be pointed out that the above is only a preferred embodiment of the utility model, and does not impose any form of limitation on the utility model. Any technician familiar with the profession can use the technical content disclosed above to make changes or modify it into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model, which all fall within the protection scope of the utility model.

Claims

1. A lock-type hot air outlet structure, comprising a hot air outlet combination brick and a hot air branch pipe, characterized in that: The hot air branch pipe (1) is composed of a working layer (2) and an insulation layer (3). The hot air outlet composite bricks are composed of various forms of special-shaped bricks. The first special-shaped brick (5) is used as a mother brick, and a cross-engaging buckle is arranged on the brick side. The inner ring inside the center of the hot air outlet is built with a first special-shaped brick (5) cross-laid in a full ring plus a half ring manner without a ring seam. The other half ring is built with a second special-shaped brick (6). The outer side of the first special-shaped brick (5) is provided with an insulation layer (3). The outer side of the second special-shaped brick (6) is provided with a full ring of third special-shaped bricks (8). The outer side of the third special-shaped brick (8) is provided with a working layer (2). The contact portion between the outer ring of the hot air outlet and the furnace shell is built with a half ring of fourth special-shaped bricks (7).

2. The lock-type hot air outlet structure according to claim 1, characterized in that: The first special-shaped brick (5) is provided with a raised cross buckle on one side and a recessed cross buckle matching the raised cross buckle on the other side.

3. The lock-type hot air outlet structure according to claim 1, characterized in that: The second special-shaped brick (6) is provided with a raised cross buckle on one side, a recessed cross buckle matching the raised cross buckle on the other side, and a wedge-shaped protrusion matching the wedge-shaped groove on the third special-shaped brick (8) on one end.

4. The lock-type hot air outlet structure according to claim 1, characterized in that: The third special-shaped brick (8) is provided with a protruding block on one side, a groove matching the protrusion on the other side, and a wedge-shaped groove matching the wedge-shaped protrusion on the second special-shaped brick (6) on one end.

5. The lock-type hot air outlet structure according to claim 1, characterized in that: The first special-shaped brick (5), the second special-shaped brick (6), and the third special-shaped brick (8) are all heavy refractory bricks.

6. The lock-type hot air outlet structure according to claim 1, characterized in that: The fourth special-shaped brick (7) is a lightweight refractory brick.

7. The lock-type hot air outlet structure according to claim 1, characterized in that: The first special-shaped brick (5), the second special-shaped brick (6), the third special-shaped brick (8), and the fourth special-shaped brick (7) are all wedge-shaped bricks that match each other.

8. The lock-type hot air outlet structure according to claim 1, characterized in that: The first fiber cotton (4-1) is filled between the fourth special-shaped brick (7) and the first special-shaped brick (5); and the second fiber cotton (4-2) is filled between the second special-shaped brick (6) and the third special-shaped brick (8).

9. The lock-type hot air outlet structure according to claim 1, characterized in that: The thermal insulation layer (3) is made of lightweight refractory bricks.

10. The lock-type hot air outlet structure according to claim 1, characterized in that: The working layer (2) is made of heavy refractory bricks.

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