KR100682091B1 - Extract door structure of furnace - Google Patents

Abstract

An extraction door structure for a reheating furnace is provided to easily restore the extraction doors to their original positions when extraction doors are separated from their normal positions by a collision of the extraction doors with the slab during extraction of a slab. In an extraction door structure for a reheating furnace, which is closely adhered to an exit of an inclined reheating furnace by dead load and is vertically moved, the extraction door structure is characterized in that guide blocks are installed on a boundary part between neighboring extraction doors(10A,10B), and the guide blocks comprise: both-side projecting type guide blocks(21) of which both edge portions are projected toward an adjacent extraction door, and which are fixed onto upper and central portions of one extraction door; thick-plate type guide blocks(22) which are formed in a plate shape such that projection parts of the both-side projecting type guide blocks are closely adhered onto the thick-plate type guide blocks, and which are fixed onto upper and central portions of the other extraction door; a central projecting type guide block(25) of which a central portion is projected toward an adjacent extraction door, and which is fixed onto a lower portion of the thick-plate type guide block installed extraction door; and a thin-plate type guide block(24) which is formed in a plate shape such that a projection part of the central projecting type guide block is closely adhered onto the thin-plate type guide block, and which is fixed onto a lower portion of the both-side projecting type guide block installed extraction door.

Description

Extract door structure of furnace

1 is a side view showing the structure of the extraction door of a general heating furnace;

2 is a perspective view showing a heating furnace having an extraction door of a conventional structure;

3 is a perspective view showing a state in which the extraction door of the conventional structure is separated from the normal position;

Figure 4 is a perspective view schematically showing a heating furnace having an extraction door having a structure of the present invention;

5 is a detailed view of main parts of the present invention;

6 is an exploded perspective view showing the main part of the present invention.

※ Explanation of symbols about main part of drawing ※

1: heating furnace

4: chain

10, 10A, 10B: Extraction Door

21, 22, 23, 24, 25: guide block

21a, 23a, 25a: main body

21b, 23b, 25b: protrusions

The present invention relates to an extraction door structure of a heating furnace, and more particularly, to an extraction door of a heating furnace configured to easily return to an original position when the extraction door is separated from a normal position by a collision with the slab during slab extraction. It's about structure.

In general, the furnace is a facility for heating the slabs produced through the reproducing process to a suitable temperature for hot rolling, which is a post process. Moved to rolling equipment.

In such a furnace, the slabs are extracted to the outside through the extractor one by one according to the rolling order, and the extraction door which is closing the slab outlet of the furnace is opened.

The conventional configuration for the extraction door of such a furnace is shown in FIG.

The furnace 1 has a slab outlet 2 which is open so that the slab S heated inside the furnace 1 can be extracted to the outside.

The slab outlet 2 is opened and closed by an extraction door 3 which is connected to the chain 4 or the like and moves up and down.

Further, in order to keep the extraction door 3 in close contact with the wall forming the slab outlet 2, the wall surface forming the slab outlet 2 is formed to be inclined at an angle θ, for example, 2 °. The inclined direction of the wall surface is formed in a direction away from the heating furnace 1 toward the lower portion such that the extraction door 3 adheres to the wall surface forming the slab outlet 2 by its own weight.

In addition, the extraction door (3) is usually composed of a pair of two extraction doors (3A) (3B), as shown in Figure 2 extraction door (3A) (3B) is located on one side and the other side of the adjacent areas Each of the protrusions 5 and the groove 6 are formed vertically long and the projection 5 is fitted into the groove 6 to prevent the adjacent portions of the extraction doors 3A and 3B from being separated from each other. .

Therefore, the extraction door 3 opens the slab outlet 2 while the one side extraction door 3A and the other side extraction door 3B are lifted up and down alternately to open the slab S to the outside of the heating furnace 1. Allow extraction.

However, the conventional extraction door structure described above has the following problems.

As shown in FIG. 2, the slab S is often extracted in a state out of an appropriate position. In this case, the slab S is extracted while hitting a lower portion of one side of the extraction door 3B, which is closed while the slab S is extracted. The projection 5 of the extraction door 3B escapes from the groove 6 of the adjacent extraction door 3A by hitting.

Therefore, the slab (S) hits the extraction door (3B) is not extracted by moving the slab (S) to the appropriate position, such as to take a lot of labor and time to solve the extraction obstacles, as well as having a problem of delaying the post-process As shown in FIG. 3, the extraction doors 3A and 3B are separated from each other so that the internal high heat and flames of the heating furnace 1 leak out to the outside, and the extracted extraction doors 3A ( Recombination of 3B) required a lot of labor and time, which significantly lowered the productivity of the furnace.

Accordingly, the present invention is to solve the above-mentioned problems, the extraction door structure of the heating furnace configured to be easily returned to the original position when the extraction door is separated from the normal position by the collision with the slab during slab extraction The purpose is to provide.

As a technical configuration for achieving the above object, the present invention in the extraction door structure of the heating furnace is installed to be in close contact with the self-weight and moved up and down at the exit of the inclined heating furnace, the boundary between the extraction doors adjacent to each other Guide blocks are installed in the guide blocks, both edge portions of which are formed to have a shape protruding toward an adjacent extraction door, and fixed to both upper and center portions of one extraction door, and both protrusions. The plate-shaped guide blocks are formed to have a flat plate shape to closely contact the protrusions of the guide block and are fixed to the upper and center portions of the other extraction door, and the central portion protrudes toward the adjacent extraction door. A central protrusion guide block fixed to a lower portion of the extraction door, and the center Providing the extraction door structure of the heating furnace characterized in that it comprises a thin plate-shaped guide block is fixed to the lower portion of the extraction door in which the protruding portion of the protruding guide block has a flat plate shape is installed on both sides protruding guide block. .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view schematically showing a heating furnace having an extraction door having a structure of the present invention, one side of the heating furnace 1 can be extracted to the outside of the slab heated in the interior of the heating furnace (1). It has a configuration that is opened and closed by the extraction door 10 so that.

And, the extraction door 10 is connected to the chain (4) or the like has a conventional configuration that is moved up and down.

In addition, in order to maintain the state in which the extraction door 10 is in close contact with the wall forming the slab exit, the wall surface forming the slab exit is formed to be inclined at an angle, for example, 2 °, the inclined direction of the wall It is also similar to the conventional structure that is formed in a direction away from the heating furnace 1 toward the lower side so that the extraction door 10 is in close contact with the wall surface forming the slab exit by its own weight.

The extraction door 10 of the present invention is configured such that two extraction doors 10A and 10B are paired, and the extraction doors 10A and 10B alternately move up and down to open the slab outlet to open the slab. Extraction is possible outside of the furnace.

Guide blocks are mounted on the extraction doors 10A and 10B, respectively, in the upper, middle, and lower regions of adjacent portions, and the guide blocks are fixed to the extraction doors 10A and 10B by bolts or the like. .

The guide blocks mounted on one side extraction door 10A and the guide blocks mounted on the other side extraction door 10B have a length of about 1/3 of the length of the up and down direction of the extraction doors 10A and 10B. By having the guide blocks are installed in a continuous shape over the entire length of the extraction door (10A) (10B) in the vertical direction.

Hereinafter, the shape of the guide blocks used in the present invention will be described in detail with reference to FIG. Hereinafter, for convenience of explanation, one extraction door 10A will be referred to as a left extraction door 10A and the other extraction door 10B will be referred to as a right extraction door 10B.

The guide blocks used in the present invention are both protruding guide blocks 21 mounted on the upper region of the left extraction door 10A, and thick plate guide blocks 22 mounted on the upper and center regions of the right extraction door 10B. ), The one-side protruding guide block 23 mounted in the center region of the left extraction door 10A, the thin guide block 24 mounted in the lower region of the left extraction door 10A, and the right extraction door 10B. It includes a central protruding guide block 25 mounted in the lower region of the).

The two protruding guide block 21 is largely composed of a main body portion 21a and a protruding portion 21b, the main body portion 21a has a flat plate shape, and the protruding portion 21b has both sides of the main body portion 21a. Protruded to have a continuous shape up and down, and the total thickness of the portion where the protruding portion 21b is formed is set to be approximately 1/2 of the gap formed between the extraction doors 10A and 10B.

The thick plate-shaped guide block 22 is a flat member having a thickness approximately 1/2 of the gap formed between the extraction doors 10A and 10B.

The one-sided protruding guide block 23 is largely composed of a main body portion 23a and a protruding portion 23b, and the main body portion 23a is substantially the same as the main body portion 21a of the both protruding guide blocks 21. It has a flat plate shape formed to have a thickness, the protrusion 23b is projected on one side of the main body 23a has a continuous shape up and down, the entire thickness of the portion where the protrusion 31b is formed is the extraction door (10A) It is set so that it becomes about 1/2 of the space | interval formed between (10B).

The thin guide block 24 has a flat plate shape formed to have approximately the same thickness as the main body portion 21a of the both side protruding guide block 21 and the main body portion 23a of the one side protruding guide block 23.

The central protruding guide block 25 is composed of a main body portion 25a and a protruding portion 25b, and the main body portion 25a has a flat plate shape formed to have approximately the same thickness as the thick plate-shaped guide block 22. The protruding portion 25b protrudes from the central portion of the main body portion 25a to have a vertically continuous shape.

At this time, the protruding portion 25b of the central protruding guide block 25 has a protruding degree with the protruding portion 21b of the both protruding guide block 21 and the protruding portion 23b of the one-side protruding guide block 23. It is set to have a size which is about the same or slightly smaller, and the size of the width is set smaller than the distance between the protrusions 21b of the both protruding guide blocks 21.

In the exemplary embodiment of the present invention, the one-side protruding guide block 23 is mounted on the central region of the left extraction door 10A, and the thick plate-shaped guide block 22 is mounted on the central region of the right extraction door 10B. However, the guide blocks 24 and 25 mounted in the lower regions of the extraction doors 10A and 10B are equally mounted in the center region of the extraction doors 10A and 10B, or the extraction doors 10A and 10B. The guide blocks 21 and 22 mounted in the upper region of the may be similarly mounted in the central region of the extraction doors 10A and 10B.

The extraction door structure of the present invention having such a configuration has the following functions.

When the left extraction door 10A and the right extraction door 10B are both lowered, the slab outlet of the heating furnace 1 is closed, and guide blocks installed between the extraction doors 10A and 10B are heated. The internal high temperature and flame of (1) are suppressed to the outside as much as possible.

That is, the tip 21b of the protruding portion 21b of both protruding guide blocks 21 extends to approach the surface of the thick plate guide block 22, so that high heat and flame leakage through the upper region between the extraction doors 10A and 10B. This is suppressed, and the tip of the protrusion 23b of the one-sided protruding guide block 23 extends so as to be close to the surface of the thick plate-shaped guide block 22 so that high heat through the central region between the extraction doors 10A and 10B and Flame leakage is suppressed, and the tip of the protrusion 25b of the central protruding guide block 25 extends so as to be close to the surface of the thin guide block 24 so that high heat through the lower region between the extraction doors 10A and 10B is achieved. And flame leakage is suppressed.

If the slab is out of the proper position when the slab is extracted to the outside of the heating furnace after moving one extraction door to the upper side, the slab hits the lower part of the other extraction door that is closed, and by such a blow, the extraction door Deviate from each other.

When the extraction doors 10A and 10B are separated from each other, the operator raises the closed extraction doors so that the center guide type blocks of the thin guide block 24 of the one extraction door 10A and the other extraction door 10B ( 25) are located at the same height.

In the state where the thin guide block 24 of the extraction door 10A of one side and the center protruding guide block 25 of the other extraction door 10B are located at the same height, the guide block 21 of the extraction door 10A of one side is opened. 23 and 24 and guide blocks 22 and 25 of the other extraction door 10B do not interfere with each other, and at the same time, the extraction doors 10A and 10B closely adhere to the wall forming the slab exit by their own weight. As a result, the extraction doors 10A and 10B are returned to their normal positions.

Of course, when the extraction door (10A) (10B) is returned to the normal position as described above, the extraction door opened for slab extraction is located at the position and the other extraction door is lowered to return to the original state.

According to the extraction door structure of the heating furnace according to the present invention as described above, it has an excellent effect that can quickly and simply return to the normal position the extraction door that is separated from the normal position by the collision with the slab during slab extraction. .

In addition, when this operation is to move the extraction door up and down at a long distance, the risk of a safety accident that the operator directly returns to the normal position in the high temperature environment near the heating furnace is prevented.

Claims (2)

In the extraction door structure of the heating furnace is installed to be in close contact with the self-weight at the exit of the inclined furnace to move up and down, Guide blocks are installed at the boundary between the adjacent extraction doors 10A and 10B, and the guide blocks are formed such that both edge portions protrude toward the adjacent extraction doors, so that the guide blocks are disposed at the upper and center portions of one extraction door. Both protruding guide blocks 21 fixed to each other, and the plate-shaped guide blocks 22 fixed to the upper and center portions of the other extraction door and having a flat plate shape to closely contact the protruding portions of the protruding guide blocks 21 on both sides. And a central protrusion guide block 25 formed to have a center portion protruding toward an adjacent extraction door, and fixed to a lower portion of the extraction door on which the thick plate guide block 22 is installed, and the central protrusion guide block. A thin plate shape having a flat plate shape so that the protruding portion of the 25 is in close contact and fixed to a lower portion of the extraction door in which the two protruding guide blocks 21 are installed. Extraction door structure of the furnace characterized in that it comprises a guide block (24). The method of claim 1, wherein the two protruding guide block 21 is fixed to the central portion of the extraction door is replaced by a one-side protruding guide block 21, the one side protruding guide block 21 of the heating furnace An extraction door structure of a heating furnace, characterized in that the edge portion located on the outer side is formed to protrude toward the adjacent extraction door.

Images