KR19990013549U - Furnace Extraction Door Device - Google Patents

Abstract

The present invention relates to a heating furnace extraction door device separately installed between the left and right main extraction doors in order to smoothly extract the slab heated to a high temperature suitable for the rolling process in the furnace installed in the rolling mill, An auxiliary door is installed between two left and right main extraction doors installed on the front of a heating furnace having two rows which are alternately extracted to open and close for the slab extraction operation. Protruding jaw is formed in the lower part, and a rail is formed in the vertical direction, and the left and right conical guides are attached to the front upper part, respectively, and the left and right main parts are provided on both sides of the auxiliary door. A protrusion may be formed to move up and down along a rail formed in the extraction door, and the left and right conical guides may be inserted into the front surface. It is constructed by attaching and installing a grooved guide, so that even if the slab is charged into the center of the heating furnace or extracted into the center due to the meandering operation of the working beam, it can prevent the extraction door from being caused by the extraction door. It is possible to improve the productivity by preventing the extraction delay phenomenon, to prevent the breakage of the extraction door, and to prevent the various safety accidents occurring in the treatment of the twisted slab in advance.

Description

Furnace Extraction Door Device

The present invention is a heating furnace in which a separate auxiliary door is installed between the left and right main extraction doors to smoothly extract slab heated to a high temperature suitable for a rolling process in a reheating furnace installed in a rolling mill. It relates to an extraction door device.

In general, in a rolling mill of a steel mill, the material is heated to a temperature (1100-1300 ° C.) suitable for rolling in a heating furnace to remove the scale of the material surface, and then rolling is performed in a rolling mill.

1 is a front view showing an extraction operation using an extraction door in a conventional heating furnace, Figure 2 is a plan view.

In the furnace (1), the slab (S), which is a heated material, is extracted one by one using the extractor (4) according to the rolling order, and in the furnace (1), two rows are installed at the left and the right, one at each row. It will be extracted alternately.

Therefore, when the slab (S), which is a rolled material, is charged to be automatically centered when charged in two rows for heating in the heating furnace (1), the centering is not performed properly. Due to the meandering operation of the moving beam 5 for moving the slab S installed inside the furnace 1, the slab S is charged toward the center of the furnace 1 during extraction, so that the heat not extracted The door is not opened.) The slab S is twisted in the direction of movement of the slab S while being caught by the extraction door 2a, causing the extraction to fail, and in severe cases, until the extraction door 2a is damaged. there was.

In addition, it takes a lot of extraction time in accordance with the above extraction disorders, there was a problem that the risk of safety accidents such as burns or falls by the high temperature inside the furnace in the process of processing there is always present.

The present invention is designed to solve the above problems, by installing the auxiliary door between the two left, right main extraction door to open the auxiliary door when the main extraction door of the column performing extraction work in the charging operation It is an object of the present invention to provide a heating furnace extraction door device that prevents the slab from hitting the main extraction door of the other side that is not extracted due to the poor centering of the working beam or the meandering operation of the working beam.

1 is a front view showing an extraction operation using a conventional extraction door,

2 is a plan view showing an extraction operation using a conventional extraction door,

Figure 3 is a front view showing the extraction operation using the present invention heating furnace extraction door device,

Figure 4 is an exploded perspective view of the present invention heating furnace extraction door device.

5 is a plan view of the present invention heating furnace extraction door device,

6a and 6b is a front view showing an operating state of the present invention heating furnace extraction door device.

<Description of Symbols for Main Parts of Drawings>

1: heating furnace

2a, 2b: left and right extraction door

3: roller table

4: extractor

5: walking beam

10a, 10b: left and right main extraction doors

11a, 11b: left and right conical guides

12: auxiliary door

13: guide

S: slab

The present invention is installed on the front of the furnace having two rows of alternately extracted, the auxiliary door 12 between the two left and right main extraction doors (10a, 10b) installed to open and close for the extraction operation of the slab Although installed, the left and right side of the main extraction door (10a) (10b) in contact with the auxiliary door 12 of the lower side to form a projection jaw, a vertical direction to form a rail, the front of the upper left respectively Attaches and installs the right conical guides (11a) (11b), the projections on both sides of the auxiliary door 12 to move up and down along the rail formed on the left and right main extraction door (10a) (10b) It is formed, the front and the left and right conical guides (11a, 11b) is formed by attaching and installing a guide 13 formed with a groove to be inserted.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention heating furnace extraction door device.

3 is a front view showing a heating furnace in which the present invention heating furnace extraction door apparatus is installed, FIG. 4 is an exploded perspective view of the present invention heating furnace extraction door apparatus, and FIG. 5 is a plan view.

Furnace extraction door device of the present invention is composed of the main extraction door (10a) (10b) and the auxiliary door 12, the main extraction door (10a) (10b) is the front left and right of the furnace 1, respectively 1 The unit is installed one by one, and the auxiliary door 12 is installed at the center of the heating furnace 1 so that one of the main extraction doors is opened so that the auxiliary door 12 is also opened.

On the left and right main extraction doors (10a) and (10b), respectively, a rail is formed on a surface in contact with the auxiliary door (12), but a protruding jaw is formed at the bottom so that the auxiliary door (12) does not sag or falls off, and In order to ensure that the auxiliary door is always in place before and after operation, the left and right conical guides 11a and 11b are manufactured to protrude.

The auxiliary door 12 has the same height and thickness and is narrowly installed between the left and right main extraction doors 10a and 10b, but is engaged with the left and right main extraction doors 10a and 10b to move up and down. Protruding parts are formed on both sides to fit the rails formed on the left and right main extraction doors 10a and 10b, and the left and right conical shapes are installed on the left and right main extraction doors 10a and 10b on the front upper part. Conical grooves into which the guides 11a and 11b can be inserted are manufactured and installed in the guides 13 formed at the left and the right, respectively.

Designed to give a proper distance between the rails formed on the left and right main extraction doors (10a) (10b) and the protrusions formed on both sides of the auxiliary doors 12 so that they can operate smoothly even in thermal expansion due to high heat. Filling with a heat insulating material is preferred to minimize the thermal deformation.

Hereinafter, with reference to the accompanying drawings the operating state of the present invention heating furnace extraction door device configured as described above will be described in detail.

As shown in FIG. 6A, when the slab S located in the right column of the heating furnace is to be extracted, the auxiliary main door 12 is operated at the lower part of the right main extraction door 10b when the main main extraction door 10b is opened. It moves along the upper side along the formed protruding jaw and the rail of the side, the left main extraction door (10a) is kept closed to prevent the slab (S) from colliding.

After the extraction of the slab S is finished, the right main extraction door 10b is closed again. At this time, the guide 13 formed in the subdoor 12 is formed in the conical guide 11a formed on the upper side of the left main extraction door 10a. While being fitted, the right main extraction door 10b and the auxiliary door 12 are correctly seated in position, thereby completing the extraction while achieving the original standby state.

Next, as shown in FIG. 6B, the left main extraction door 10a is opened and the extraction operation of the slab S is performed again. In this case, the auxiliary door 12 is opened together to prevent the slab S from colliding as described above. Done.

As described above, by using the present invention furnace extraction door device, even if the slab is charged into the center of the furnace or extracted into the center due to the meandering operation of the working beam, the extraction door can be prevented from colliding with the extraction door and causing the extraction failure. It is possible to improve the productivity by preventing the extraction delay caused by obstacles, to prevent the damage of the extraction door, and to prevent the various safety accidents occurring in the treatment of the twisted slab in advance.

Claims (1)

An auxiliary door 12 is installed between two left and right main extraction doors 10a and 10b which are installed at the front of the furnace having two rows which are alternately extracted to be opened and closed for extraction of the slab. On the surface of the left and right main extraction doors (10a) and (10b) in contact with the auxiliary door 12, a projection jaw is formed in the lower portion, a rail is formed in the vertical direction, and left and right conical shapes respectively in the upper portion of the front Guides 11a and 11b are attached and installed, and protrusions are formed on both side surfaces of the auxiliary door 12 to move up and down along rails formed in the left and right main extraction doors 10a and 10b. A heating furnace extraction door device, characterized in that the front and the guide is formed by attaching the guide 13 is formed so that the left and right conical guides (11a) (11b) can be inserted.