KR20090016220A - Apparatus for preventing breakaway of heat furnace extracting door - Google Patents

Apparatus for preventing breakaway of heat furnace extracting door Download PDF

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Publication number
KR20090016220A
KR20090016220A KR1020070080704A KR20070080704A KR20090016220A KR 20090016220 A KR20090016220 A KR 20090016220A KR 1020070080704 A KR1020070080704 A KR 1020070080704A KR 20070080704 A KR20070080704 A KR 20070080704A KR 20090016220 A KR20090016220 A KR 20090016220A
Authority
KR
South Korea
Prior art keywords
extraction door
door
furnace
heating furnace
extraction
Prior art date
Application number
KR1020070080704A
Other languages
Korean (ko)
Inventor
김영복
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020070080704A priority Critical patent/KR20090016220A/en
Publication of KR20090016220A publication Critical patent/KR20090016220A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/32—Casings
    • F27B9/34—Arrangements of linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/39—Arrangements of devices for discharging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1858—Doors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

An apparatus for preventing breakaway of an extracting door for a furnace is provided to prevent an extracting door from being separated when a chain for falling/raising an extracting door of a furnace is broken owing to thermal transformation, thereby maintaining heat inside the furnace and protecting an operator safely. An apparatus for preventing breakaway of an extracting door(110) for a furnace(100) comprises the following units. A base plate(200) is installed on an upper part of the furnace. A pair of supporting plates(210,220) having a guiding hole are fixed on an upper and lower parts of the base plate at a predetermined distance. A sliding bar penetrating the guiding hole of the supporting plates is connected to an upper part of the extracting door.

Description

Separation prevention device of heating door extraction door {APPARATUS FOR PREVENTING BREAKAWAY OF HEAT FURNACE EXTRACTING DOOR}

The present invention relates to an apparatus for preventing the extraction of the extraction door of the heating furnace, and more particularly, even if the connection chain of the extraction door is broken by the high heat generated inside the heating furnace, the extraction door is not separated from the outside. It relates to a departure prevention device of.

In general, in a rolling mill of a steel mill, slabs heated at a temperature (1100-1300 ° C.) suitable for rolling in a heating furnace are rolled after descaling formed on the surface thereof.

In other words, the slab manufactured by continuous casting through the steelmaking and smelting process is transferred to the thick plate factory and then rolled into a thick plate through the rolling process. In order to perform the rolling process, the slab is heated to a predetermined temperature or more. Only then will it be possible to manufacture higher quality plates.

To this end, a heating furnace 1 as illustrated in FIGS. 1 and 2 is subjected to the heating, in which the preheated and cracked slab 2 to approximately 1100-1300 ° C. in the heating furnace 1 is opened after the extraction door 3 is opened. It is extracted through the extractor 6 and seated on the conveying roll 4 and then conveyed to the rolling mill.

In addition, the opening and closing of the extraction door 3 is made by the chain 5, the chain 5 is connected to a crane or the like as a drive source.

At this time, since the chain 5 is used at high heat points, the chain 5 is made of a material having heat resistance.

Nevertheless, if heating and cooling by high heat are repeated when the extraction door 3 of the heating furnace 1 is opened and closed, thermal deformation occurs in the chain 5 and is momentarily exceeded.

However, when such a breakage of the chain 5 occurs during the extraction door 3 ascending operation, the extraction door 3 is inclined and separated from the heating furnace 1, resulting in heat loss inside the heating furnace 1. And harming workers who were working nearby.

In addition, the cooling water supply and discharge lines installed around the extraction door (3) also causes damage to the equipment accidents, resulting in a severe cost increase due to maintenance.

The present invention has been made in view of the above-mentioned problems in the prior art, and is created to solve this problem, even though the chain used to open and close the extraction door installed at the extraction side of the furnace is broken, the extraction door is inclined and separated from the furnace. The main problem is to provide an apparatus for preventing the escape of the extraction door of the furnace, which prevents it from escaping and preserves the heat inside the furnace.

The present invention is a means for achieving the above-described problem, the device for preventing the separation of the extraction door installed on the slab outlet side of the heating furnace; A plate-shaped base plate fixed to the upper surface of the heating furnace; A pair of support plates fixed vertically at intervals vertically on one surface of the base plate and having guide holes; A sliding bar disposed through the guide hole of the support plate and having a lower end connected to an upper end of the extraction door; It is provided on the support plate and the separation prevention device of the heating furnace extraction door comprising an air supply pipe having an injection nozzle for injecting cooling air toward the sliding bar.

At this time, the guide hole of the support plate is also characterized in that the guide roll is further provided in the rolling contact with the sliding bar.

In addition, the separation prevention plate is fixed to the top and bottom of the sliding bar, the bottom departure prevention plate is characterized in that the connection is fixed to the upper end of the extraction door.

According to the present invention, even if the chain for raising and lowering the extraction door of the furnace is damaged by thermal deformation, it prevents separation and separation of the extraction door to preserve the internal heat of the furnace and secure the safety of the surrounding workers, maintenance costs of the furnace maintenance It is possible to obtain the effect of reducing the cost.

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

Figure 3 is a perspective view showing the installation of the departure prevention apparatus according to the present invention, Figure 4 is an operating state diagram of the departure prevention apparatus according to the present invention, Figure 5 is a partial exploded perspective view of the departure prevention apparatus according to the present invention.

3 to 5, the extraction door departure prevention apparatus of the heating furnace according to the present invention is installed on the upper surface of the heating furnace (100).

That is, the base plate 200 is fixed to the upper surface of the heating furnace 100, the base plate 200 is fixed in a standing form.

At this time, the fixing method may be a variety of known methods, but a welding method is preferable.

In addition, a pair of support plates 210 and 220 are vertically fixed to one side surface of the base plate 200 at intervals up and down.

Therefore, the overall shape of the base plate 200 to which the support plates 210 and 220 are fixed is in the form of 'ㅑ' or 'ㅕ' depending on the viewing direction.

In addition, the support plates 210 and 220 are perforated with guide holes 230 at positions corresponding to each other.

In addition, the guide hole 230 may be provided with a pair of guide rolls 232 for smoothly supporting the sliding bars (240, 250) to be described later.

Meanwhile, the sliding bars 240 and 250 are fitted into the guide holes 230, respectively. In order to prevent the sliding bars 240 and 250 from being separated, the separation preventing plates 260 may be bolted to upper and lower ends thereof.

Of course, the departure prevention plate 260 is optional, and is not necessarily a required element, in particular, if installed, the departure prevention plate 260 fixed to the bottom is fixed to each extraction door 110, If there is no departure prevention plate 260 may be installed in the form that the lower end of the sliding bar (240, 250) is directly fixed to the extraction door (110).

Therefore, the sliding bars 240 and 250 have a structure that is interlocked with the up and down flow of the extraction door 110.

In addition, the structures of the present invention including the sliding bars 240 and 250 are required to be periodically or continuously cooled because they are located at high heat points, and this is to minimize cracking due to bending deformation or cooling shrinkage due to high thermal expansion.

To this end, air supply pipes 270 and 280 are piped in close proximity to the sliding bars 240 and 250 on the support plates 210 and 220, and injection nozzles 290 are installed in the air supply pipes 270 and 280.

At this time, the injection nozzle 290 is preferably disposed to face the sliding bar (240,250).

The operation relationship of the extraction door departure prevention device according to the invention made in this configuration is as follows.

In the normal state, the extraction door 110 is raised as the chain 120 rises. When the extraction side of the heating furnace 100 is opened, the extractor 150 enters and pulls out the heated and cracked slab 140. The transfer roll 130 is moved.

Accordingly, the slab 140 transferred to the transfer roll 130 is transported to the rolling facility and then rolled.

At this time, the sliding bar 240, 250 according to the present invention is fixed to the upper end of the extraction door 110, the lower end is linked with the lifting and lowering operation of the extraction door 110 is raised and lowered together.

If the chain 120 is broken by heat deformation while such an operation is repeatedly performed for a long time, the extraction door 110 is inclined and is to be separated from the extraction side of the heating furnace 100, but at this time, the extraction door 110 Since the sliding bars 240 and 250 moving together support the outer side of the extraction door 110, the extraction door 110 is not lifted but maintains its state without being tilted.

That is, the extraction door 110 when the two chains 120 are all broken, the extraction side of the heating furnace 100 due to its own weight is sealed while waiting in that state without being inclined, the two chains 120 If any one of them is damaged, it does not tilt and waits in that state.

As shown in FIG. 3, since both end surfaces of the extraction door 110 are almost fitted to a wall surface provided at the extraction side of the heating furnace 100, the extraction door 110 may flow (tilt). The direction is only the front of the extraction door 110, but even the front is supported by the present invention sliding bar (240, 250), the extraction door 110 is never inclined.

Then, when such a phenomenon occurs, it is possible to cope with the chain 120 accidental accident by maintaining the worker quickly.

1 and 2 are exemplary views showing the operating state of the heating furnace and the extraction door installed on the extraction side according to the prior art,

Figure 3 is a perspective view showing an installation state of the departure prevention device according to the invention,

Figure 4 is an operating state of the departure prevention device according to the invention,

5 is an exploded perspective view of a part of the departure prevention apparatus according to the present invention.

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

100 .... Heating 110 .... Extraction door

120 ... chain 200 ... baseplate

210,220..Support plate 230 .... Guide hole

232 .... Guide roll 240,250 .... Sliding bar

260 ... Release prevention plate 270,280

290 .... injection nozzle

Claims (3)

An apparatus for preventing the extraction of the extraction door installed on the slab outlet side of the heating furnace; A plate-shaped base plate fixed to the upper surface of the heating furnace; A pair of support plates fixed vertically at intervals vertically on one surface of the base plate and having guide holes; A sliding bar disposed through the guide hole of the support plate and having a lower end connected to an upper end of the extraction door; The apparatus for preventing separation of a furnace extraction door, comprising: an air supply pipe fixed to the support plate and having an injection nozzle for injecting cooling air toward the sliding bar. The method according to claim 1; Guide hole of the support plate departure preventing device of the heating furnace extraction door, characterized in that further provided with a guide roll in contact with the sliding bar rolling. The method according to claim 1; The separation prevention plate is fixed to the top and bottom of the sliding bar, the bottom departure prevention plate is a separation prevention device of the heating furnace extraction door, characterized in that fixed to the upper end of the extraction door.
KR1020070080704A 2007-08-10 2007-08-10 Apparatus for preventing breakaway of heat furnace extracting door KR20090016220A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070080704A KR20090016220A (en) 2007-08-10 2007-08-10 Apparatus for preventing breakaway of heat furnace extracting door

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070080704A KR20090016220A (en) 2007-08-10 2007-08-10 Apparatus for preventing breakaway of heat furnace extracting door

Publications (1)

Publication Number Publication Date
KR20090016220A true KR20090016220A (en) 2009-02-13

Family

ID=40685476

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070080704A KR20090016220A (en) 2007-08-10 2007-08-10 Apparatus for preventing breakaway of heat furnace extracting door

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101246255B1 (en) * 2011-01-28 2013-03-21 현대제철 주식회사 Heating furnace
KR20160071056A (en) * 2014-12-11 2016-06-21 주식회사 포스코 Apparatus for sealing extracting door of furnace
CN108692570A (en) * 2018-04-30 2018-10-23 中山市加丰机械科技有限公司 A kind of fire door automatic lifting structure of large-capacity ore furnace

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101246255B1 (en) * 2011-01-28 2013-03-21 현대제철 주식회사 Heating furnace
KR20160071056A (en) * 2014-12-11 2016-06-21 주식회사 포스코 Apparatus for sealing extracting door of furnace
CN108692570A (en) * 2018-04-30 2018-10-23 中山市加丰机械科技有限公司 A kind of fire door automatic lifting structure of large-capacity ore furnace

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