KR20090015585A

KR20090015585A - Upper part sealing apparatus of slab extracting door in the heating furnace

Info

Publication number: KR20090015585A
Application number: KR1020070080022A
Authority: KR
Inventors: 김영복
Original assignee: 주식회사 포스코
Priority date: 2007-08-09
Filing date: 2007-08-09
Publication date: 2009-02-12

Abstract

The present invention relates to an upper sealing device of a furnace extraction door, comprising: an apparatus for sealing an upper part of an extraction door of a furnace; A plurality of fixing brackets installed and fixed at predetermined intervals on the upper surface of the extraction door; A guide groove formed obliquely downward on the fixing bracket; It provides an upper sealing device of the furnace extraction door, characterized in that consisting of a sealing block is a heavy body having a fixed shaft fitted in the guide groove is provided to seal the entire width of the extraction door.

The present invention can always seal the upper portion of the extraction door of the heating furnace to completely seal the gap generated during the operation of the extraction door to prevent the leakage of heat or invasion of external air, thereby preventing heat dissipation, thereby improving product quality And energy savings.

Description

UPPER PART SEALING APPARATUS OF SLAB EXTRACTING DOOR IN THE HEATING FURNACE}

The present invention relates to an upper sealing device of a heating furnace extraction door, and more specifically, to the slab temperature preheated and cracked through the heating furnace due to the heat loss caused by the failure of the upper sealing of the extraction door in the extraction standby state. The upper sealing device of the furnace extraction door to minimize the drop.

In general, a pusher type heating furnace is used in a hot rolled or thick plate mill.

This pusher heating furnace is a device that preheats the slab in advance to a suitable temperature for rolling before rolling the slab, and pushes the pusher from one side of the heating furnace in a state in which a plurality of slabs are sequentially arranged to cause the slabs to be installed inside the heating furnace. To be transported on skid pipes.

As such, the slab transferred is extracted to the roller table 3 in the open state in which the extraction door 2 installed at the outlet side of the heating furnace 1 is opened, and then transferred to the rolling facility.

At this time, the extraction door (2) should be sufficiently sealed to maintain the inside of the furnace (1) at an appropriate temperature and pressure for heating the slab (4).

Nevertheless, when the extraction door 2 is opened and closed by the chain 5 for the slab 4 extraction, the internal and external factors, in particular, the slab 4 extracted during the opening and closing of the extraction door 2, As shown by the broken line by the phenomenon such as being pushed out, the upper side of (2) is often opened to cause a gap.

However, such a phenomenon causes the cold air to flow into the furnace 1 rapidly as the hot gas is released from the inside of the furnace 1 through the gaps, which causes temperature non-uniformity inside the furnace 1, and cracks due to dislocations. An imbalance is triggered, which in turn adversely affects quality, and also rapidly increases fuel consumption of the heating furnace 1, resulting in unnecessary energy waste.

The present invention has been made in view of the above-mentioned problems in the prior art, and has been created to solve this problem, and has a sealing means that is always in close oblique direction to the upper portion of the extraction door of the heating furnace, even when a gap occurs due to poor operation of the extraction door. The main problem is to provide an upper sealing device for the extraction door of the furnace to prevent the product defects due to heat dissipation and to save energy by blocking the leakage of heat or inflow of external air quickly.

The present invention is a device for sealing the upper portion of the extraction door of the heating furnace as a means for achieving the above object; A plurality of fixing brackets installed and fixed at predetermined intervals on the upper surface of the extraction door; A guide groove formed obliquely downward on the fixing bracket; It provides an upper sealing device of the furnace extraction door, characterized in that consisting of a sealing block is a heavy body having a fixed shaft fitted in the guide groove is provided to seal the entire width of the extraction door.

At this time, the guide groove of the fixing bracket is characterized in that it is further provided with a groove stopper for sealing it.

In addition, the front end surface of the sealing block is characterized in that it is further provided with a plurality of anchors and refractory.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

2 is an exemplary perspective view showing an installation state of the sealing apparatus according to the present invention, Figure 3 is an exploded perspective view showing the structure of the sealing apparatus according to the present invention, Figure 4 illustrates an operating state of the sealing apparatus according to the present invention. This is a side cross-sectional view of the main part.

As shown in FIG. 2, the sealing apparatus 100 according to the present invention is installed in the upper part of the extraction door 2 installed at the outlet side of the slab 4 of the heating furnace 1.

3 and 4, the sealing device 100 includes a sealing block 110 of a heavy material, one side of the sealing block 110 may be in close contact with the upper front of the heating furnace (1). So that it is formed flat.

In addition, since the front surface of the sealing block 110 is installed in close contact with a high temperature location heat resistance is required for this purpose, it is preferable that a plurality of anchors 112 and the refractory 114 is configured to be filled.

And, both sides of the sealing block 110 is connected to the fixed shaft 120 for supporting it, the fixed shaft 120 is fitted into the guide groove 140.

The guide groove 140 is formed in the fixing bracket 130, the fixing bracket 130 is fixed to the upper surface of the extraction door (2).

In this case, when the fixing bracket 130 is formed in a substantially rectangular shape, the guide groove 140 may be inclined diagonally, that is, in an oblique direction, and may smoothly flow after the fixing shaft 120 is fitted. It is formed large enough so that

In addition, after the fixing shaft 120 is fitted to seal a portion where the guide groove 140 is formed, the groove stopper 150 is padded, and the padded groove stopper 150 is formed by a bolt or a screw. It is firmly fixed.

Therefore, the fixed shaft 120 is not easily separated from the guide groove 140.

The operation relationship of the sealing device of the present invention having such a configuration is as follows.

In the normal state, the extraction door 2 is not spaced apart from the wall surface of the heating furnace 1, and is opened and closed while keeping the sealing in a close state.

Then, the slab 4 is extracted in accordance with the opening and closing of the extraction door 2, the extracted slab 4 is transported to the rolling equipment by the roller table (3).

By the way, during the opening and closing operation of the extraction door 2, when the upper part of the extraction door 2 is opened from the wall of the heating furnace 1 by various internal and external variables, a gap is generated, the sealing block 110 and the heating furnace. (1) The gap is also generated between the wall surface at the moment the sealing block 110 is moved downward along the guide groove 140 of the fixed bracket 130 by the weight of the sealing block 110, which is a heavy object This comes in close contact with the wall surface of the heating furnace 1 again.

Therefore, although a gap is generated between the extraction door 2 and the wall of the heating furnace 1, the sealing block 110 provided on the upper surface of the extraction door 2 is tightly sealed, so that external air leakage or There is no intrusion of outside air.

Figure 2 is an exemplary perspective view showing an installation state of the sealing apparatus according to the present invention,

3 is an exploded perspective view showing the structure of a sealing apparatus according to the present invention,

Figure 4 is a side sectional view showing the main portion illustratively showing the operating state of the sealing apparatus according to the present invention.

♧ description of the symbols for the main parts of the drawing ♧

1 .... heating furnace 2 .... extraction door

4 .... slab 110 .... sealing block

120 .... Fixed shaft 130 .... Fixed bracket

140 .... guide groove 150 .... groove stopper

Claims

An apparatus for sealing an upper portion of an extraction door of a heating furnace;

A plurality of fixing brackets installed and fixed at predetermined intervals on the upper surface of the extraction door;

A guide groove formed obliquely downward on the fixing bracket;

The upper sealing device of the furnace extraction door, characterized in that consisting of a sealing block is a heavy body having a fixed shaft fitted in the guide groove is provided to seal the entire width of the extraction door.

The method according to claim 1;

The guide groove of the fixing bracket, the upper sealing device of the heating furnace extraction door, characterized in that further provided with a groove stopper for sealing it.

The method according to claim 1;

The upper sealing device of the heating furnace extraction door, characterized in that the front end surface of the sealing block is further provided with a plurality of anchors and refractory.