KR100946660B1 - Suction Dummy Nozzel for Pre-heating of Upper Nozzel - Google Patents

Abstract

The present invention relates to a suction dummy nozzle for pre-heating the upper nozzle to sufficiently preheat the upper nozzle during the preheating of the tundish.

The suction dummy dummy nozzle for preheating the dummy nozzle according to the present invention is a dummy nozzle coupled to a lower part of an upper nozzle coupled to a tundish, and has a flange formed at an upper end thereof, and is formed of a refractory inside a metal shell, An upper member having a hollow portion corresponding to the upper nozzle; And a water jacket in which a hollow sphere having a diameter equal to the diameter of the hollow part is formed and coupled to a lower end of the upper member, and in which a coolant is circulated, and an injection nozzle formed in an annular portion at a central portion of the water jacket and supplied with high pressure air. Characterized in that it comprises a lower member is formed air injection pipe.

Upper Nozzle, Dummy Nozzle, Tundish, Water Jacket, Preheat, Burner

Description

Suction Dummy Nozzel for Pre-heating of Upper Nozzel}             

1 is a perspective view of burner preheating during heat storage according to the prior art;

2A and 2B are directional views of the reversible burner preheating heat flow according to the prior art.

3 is a partial cross-sectional view of a dummy nozzle according to the prior art.

Figures 4a and 4b is a partial cross-sectional and side cross-sectional view of the upper nozzle preheating suction dummy nozzle according to the present invention.

5A and 5B are views showing a state and an operating state in which the upper nozzle preheating suction dummy nozzle according to the present invention is mounted on the moving means.

※ Explanation of main code of drawing ※

1, 1a: Group A tundish preheat burner 2, 2a: Group B tundish preheat burner

3: preheat burner flame 4: upper nozzle

5: tundish 6: hole cover

8: direction of preheating heat 9: inflow of external air

10: suction dummy nozzle 10a: steel

10b: refractory 10c: hanger groove                 

10d: Clamp 11: Coolant Outlet

11a: cooling water inlet 12: air supply pipe

12a: air injection pipe 12b: air connection coupling

12c: Air injection direction 12d: Injection nozzle

13: water jacket 14: dummy nozzle

14b: insertion guide rail 30: coolant

30a: coolant tank 30b: air vent

30c: Coolant refill 31: Pump

32: heat exchanger 32a: fan

33: terminal box 33a: outlet

33b: power source 34: vehicle

34a: wheel 34b: handle

The present invention relates to a upper nozzle of a tundish used in the reprocessing process of a batch shredding place, and more particularly, to a suction dummy nozzle for pre-heating an upper nozzle to sufficiently preheat the upper nozzle during the preheating of the tundish.

Conventionally, there is no separate process of preheating the upper nozzle 4, and a passive preheating method of preheating the upper nozzle 4 is used depending on the internal heat generated during preheating using a regenerative burner.

In addition, the dummy nozzle 10 was also a simple device for preventing the internal heat generated in the preheating process of the tundish 5 to be discharged to the outside, the deterioration of the tundish lower portion made of a simple steel structure by thermal shock.

Such regenerative burners are divided into two groups of burners due to the nature of the equipment and are alternately heated for a predetermined time. While the burner of the group A is heated, the burner of the group B causes the internal air to flow out through the burner of the group B so that the tundish 5 is heated. The tundish 5 is heated by heating and circulating the internal air to the outside through the burner of group A.

However, in the cooling method as described above, air flows through the upper nozzle 4 formed under the tundish 5, and the upper nozzle is not sufficiently heated. As shown in Fig. 2, when the burners of the group A are heated, the heated heat is discharged to the outside through the burners of the group B and the upper nozzle 4 under the tundish 5, while the tundish 5 and the group B Burner and upper nozzle 4 are heated. However, when the burner of group B is heated, the heated heat is discharged to the outside through the burner of group A, and external low temperature air is introduced into the tundish 5 through the upper nozzle 4. The heat of the tundish 5 is delayed due to the inflow of cold outside air, and in particular, the upper nozzle 4 does not rise to a sufficient temperature, so that the molten steel is hardened at the time of initial casting, and thus the upper nozzle 4 is clogged rapidly without natural opening. There was this.

The present invention has been invented to solve the above problems, it is possible to stably preheat the upper nozzle by maintaining the flow direction of the air in the upper nozzle in the direction outgoing from the tundish at the time of preheating the tundish. It is an object to provide a suction dummy nozzle for pre-heating the upper nozzle.

In order to achieve the above object, the upper dummy pre-suction suction dummy nozzle of the present invention is a dummy nozzle coupled to a lower part of an upper nozzle coupled to a lower tundish, and a flange is formed at an upper end, and the inside of the metal shell is refractory. An upper member which is formed in the shape of a hollow portion corresponding to the upper nozzle in an axial direction; And a water jacket in which a hollow sphere having a diameter equal to the diameter of the hollow part is formed and coupled to a lower end of the upper member, and in which a coolant is circulated, and an injection nozzle formed in an annular portion at a central portion of the water jacket and supplied with high pressure air. Characterized in that it comprises a lower member is formed air injection pipe.

Characterized in that the insertion guide rail which can be inserted into the flange of the upper member in the lower portion of the tundish.

In order to move the upper nozzle preheating suction dummy nozzle to form a claw protruding out of the upper member, it is characterized in that it is mounted on the moving means provided with a hook that catches the claw.

The moving means includes a coolant tank, a heat exchanger connected to the coolant tank, and a fan, and a pump for circulating the coolant, thereby circulating the coolant in the water jacket of the lower member.

Hereinafter, a suction dummy nozzle for preheating the upper nozzle of the present invention will be described with reference to the accompanying drawings.

Upper nozzle pre-heating suction dummy nozzle is made of refractory, the bottom is provided with a water jacket.

A hollow upper nozzle preheating suction dummy nozzle is flanged to be coupled to the lower part of the upper nozzle.

The upper portion of the suction dummy nozzle 14 is formed into a refractory body of a metal shell to withstand high temperature heat generated when the tundish 5 is heated, and to prevent the upper nozzle 4 from being damaged by thermal shock. do.

A lower housing, a water jacket 13, and an air supply pipe 12 are provided below the suction dummy nozzle 14.

The lower part of the dummy nozzle 14 formed inside the hollow shape is an extension of the upper shape of the dummy nozzle 14 in appearance and is hollow inside. However, unlike the upper portion filled with refractory inside, the lower portion of the dummy nozzle 14 has a coolant inlet 11a and a coolant outlet 11 formed at an outer side thereof, and the inside thereof is formed by a lower housing constituting the water jacket 13. This is limited. The lower housing is coupled to the upper portion of the refractory.

An injection nozzle 12d through which air is injected is formed in the air injection pipe 12a in the inner middle portion of the lower housing to supply outside air to maintain the flow of air in a constant direction.

The air injection pipe 12a has a ring shape and is formed such that the inner diameter of the water jacket 13 and the inner diameter of the air pipe 12 are similar. One end of the air injection pipe 12a is connected to the air supply pipe 12 connected to the outside through the water jacket 13.

The injection nozzle 12a formed inwardly of the air injection pipe 12d allows the injection direction to be downward, so that the flow of air is maintained in a constant direction.

In addition, the insertion guide rail 14b is formed under the upper nozzle 4 so as to insert the suction nozzle for preheating the upper nozzle of the present invention. The flange of the suction dummy nozzle 14 is caught by the insertion guide rail 14b formed under the upper nozzle 4 so that the suction dummy nozzle is inserted into the lower part of the upper nozzle 4.

In addition, a moving means is provided to carry the upper nozzle preheating suction dummy nozzle of the present invention and to be mounted to the lower part of the upper nozzle 4.

The moving means 34 is easily moved by the wheels 34a provided in the frame, circulating the cooling water in the water jacket 13 below the suction dummy nozzle 14, and the high pressure is applied to the air injection nozzle 12d. Supply air.

A stopper 10d is protruded and bent outside the suction dummy nozzle 14, and the stopper dummy nozzle 14 is coupled to a hook formed by the stopper 10d corresponding to the frame of the moving means 34. It is mounted on the moving means 34 and moved to a desired position.

One side of the moving means 34 is provided with a heat exchanger 32 is formed with a cooling fin in the pipe. A fan 32a for cooling the cooling water is provided at the front or the rear of the heat exchanger 32 to exchange heat with the high temperature coolant flowing in the heat exchanger 32 and the low temperature outside air.

In addition, the moving means 34 is provided with a cooling water tank 30a for storing the cooling water and a cooling water pump 31 at the outlet side of the cooling water tank 30a to transfer the cooling water from the cooling water tank 30a to the heat exchanger 32. Supply. On the other hand, the upper portion of the coolant tank 30a is provided with a coolant refill port 30c used to replenish the coolant and an air vent 30b for adjusting the pressure, and the moving means 34 has a coolant pump 31 and A terminal box 33 and an outlet 33a are provided to supply power to the fan 32a.

The heat exchanger 32 is connected to the cooling water inlet 11a of the suction dummy nozzle 14 by a pipe to supply the low temperature cooling water to the water jacket 13.

The cooling water outlet 11 of the water jacket 13 is circulated again to the cooling water tank 30a of the moving means 34 through the pipe.

The action of the upper nozzle preheating suction dummy nozzle of the present invention having the above configuration is as follows.

After the suction dummy nozzle 14 is placed on the frame of the moving means 34, the worker moves the moving means 34 below the tundish 5 to preheat the tundish 5. The suction dummy nozzle 14 coupled to the moving means 34 is inserted into the insertion guide rail 14b under the upper nozzle 4, and the center of the upper nozzle 4 coincides with the center of the suction dummy nozzle 14. Let's do it.

When the centers of the upper nozzle 4 and the suction dummy nozzle 14 coincide with each other, the suction dummy nozzle 14 is operated. Power is supplied, and the external high pressure air line and the air coupling 12b provided in the air supply pipe 12 are connected. When power and high pressure air are supplied, the cooling water circulates, and high pressure air is injected into the lower part of the upper nozzle 4.

Thereafter, burners 1 and 1a of group A and burners 2 and 2a of group B are operated to preheat the tundish 5. When the burner 2, 2a of group B is preheated and the burners 1, 1a of group A are sucked in, low-temperature external air is introduced into the tundish 5 through the upper nozzle 4. However, since high-pressure air is injected to the outside of the tundish 5 through the injection nozzle 12d of the air injection pipe 12a, low-temperature outdoor air is prevented from flowing into the tundish 5. The inflow of external air is blocked by the flow of air inside the tundish 5 through the upper nozzle 4 at all times by the high pressure air injected through the suction dummy nozzle 14.

Since the air inside the tundish 5 is continuously discharged through the upper nozzle 4, the upper nozzle 4 may be sufficiently preheated.

Of course, the burners 1 and 1a of the group A operate and the heat inside the tundish 5 through the upper nozzle 4 and the suction dummy nozzle 144 also when suctioned into the burners 2 and 2a of the group B. Is emitted to the outside and the upper nozzle 4 is preheated.

On the other hand, when high pressure air is injected through the injection nozzle 12d of the air injection pipe 12a so that the upper nozzle 4 is sufficiently preheated, the heat inside the tundish 5 is discharged to the outside, so that the suction pile The nozzle 14 is exposed to high heat. At this time, since the cooling water is continuously replenished through the water jacket under the suction dummy nozzle 14, the suction dummy nozzle 14 is prevented from being oxidized prematurely, thereby extending the life.

The suction dummy dummy nozzle for preheating the upper nozzle according to the present invention allows the heat inside the tundish to be discharged to the outside through the upper nozzle continuously while the tundish is preheated, and prevents the low temperature external cold air from being introduced. Prevents clogging of the upper nozzle.

Claims (4)

In the dummy nozzle coupled to the lower portion of the upper nozzle coupled to the tundish, An upper member having a flange formed at an upper end thereof, the inside of the metal shell being formed of a refractory 10b, and having a hollow part corresponding to the upper nozzle 4 in an axial direction; And A water jacket 13 having a diameter equal to the diameter of the hollow part is formed and coupled to a lower end of the upper member and in which cooling water is circulated, and is formed in an annular shape at the center of the water jacket 13 and supplied with high pressure air. Upper nozzle preheating suction dummy nozzle, characterized in that it comprises a lower member is formed with an air injection pipe (12a) is provided with a spray nozzle (12d). The method of claim 1, Upper dummy pre-heat suction dummy nozzle, characterized in that the insertion guide rail (14b) is formed in the lower portion of the tundish can be inserted into the flange of the upper member. The method of claim 1, Upper nozzle preheating, characterized in that to form a latch (10d) protruding out of the upper member in order to move the suction nozzle dummy nozzle for preheating the upper nozzle, the hook is provided with a hook that catches the latch (10d) Suction pile nozzle. The method of claim 3, The means for moving includes a coolant tank 30a, a heat exchanger connected to the coolant tank 30a and having a fan 32a, and a pump 31 for circulating the coolant, the water jacket 13 of the lower member. Upper nozzle preheating suction dummy nozzle, characterized in that the cooling water is circulated.

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