KR20060022913A - Apparatus for minimizing heat loss from a heating furnace during slab taking-out - Google Patents

Abstract

      The present invention relates to an apparatus for minimizing heat released to the outside when extracting a heating slab in a heating furnace.

The present invention, the extraction door for opening and closing the heating furnace entrance by lifting up and down at the heating furnace entrance; A door support means having a plurality of blocking plates disposed at a lower end of the entrance of the heating furnace and configured to move up and down, and having a link unit configured to interlock with the lifting operation of the extraction door; When the extraction door is lowered and the barrier plate is raised, a through means formed in the extraction door so that the barrier plate is inserted into the extraction door side; provides a device for minimizing heat loss of the heating furnace during the slab extraction.

     According to the present invention it is possible to minimize the amount of heat emitted from the heating furnace during extraction of the slab by the extractor to significantly reduce the gas consumption due to heat dissipation, it is possible to effectively prevent the cost increase of the heating operation.

Slab Extraction, Heating Furnace, Minimize Heat Loss, Minimize Emission Calorie, Link

Description

Heat loss minimizing device of heating furnace for slab extraction {APPARATUS FOR MINIMIZING HEAT LOSS FROM A HEATING FURNACE DURING SLAB TAKING-OUT}

1 is a perspective view of a furnace and extractor according to the prior art;

2 is a process diagram of extracting slabs using a heating furnace and an extractor according to the prior art, the side cross-sectional view showing a state in which the extractor is located outside the heating furnace;

3 is a process diagram of extracting slabs using a heating furnace and an extractor according to the prior art, the side cross-sectional view showing a state in which the extractor withdraws the slab from the heating furnace;

4 is an external perspective view showing an apparatus for minimizing heat loss of a heating furnace during slab extraction according to the present invention;

5 is an operation process diagram of a device for minimizing heat loss of a heating furnace during slab extraction according to the present invention.

         a) when the extractor is located outside the furnace,

         b) when the extractor enters the inside of the furnace through the extraction door,

         c) the slab is pulled out by the extractor;

6 is a cross-sectional view of the door supporting means provided in the apparatus for minimizing heat loss of a heating furnace during slab extraction according to the present invention;

7 is a partial exploded view of the door support means provided in the apparatus for minimizing the heat loss of the heating furnace during slab extraction according to the present invention;

8 is an exploded perspective view showing the link portion of the door support means provided in the apparatus for minimizing heat loss of the heating furnace during slab extraction according to the present invention;

9 is a block diagram showing the penetrating means of the extraction door provided in the apparatus for minimizing the heat loss of the heating furnace during slab extraction according to the present invention.

       <Description of the symbols for the main parts of the drawings>

1 .... Heat loss minimizing apparatus of heating furnace in slab extraction according to the present invention

10 ... extraction door 20 .... door support means

22a, 22b ... block 24 .... casing

26a, 26b ... Guide Sphere 30 .... Links

34 .... Touch Bar 36 .... Spring

38a, 38b ... link member 40a, 40b ... pin

44 .. Hinge 46,48 .... end

46a, 48a ... pin 60 .... through means

200 .... Furnace 210 .... Extraction door

220 .... Extractor 230 .... Slab

The present invention relates to a device for minimizing heat emitted to the outside when the heating slab is extracted from the heating furnace, and more particularly, the extractor is heated through a through hole formed in the extraction door in a state in which the extraction door is minimally opened. When the slab in the furnace is extracted and the slab in the furnace is extracted, the extraction door is fully opened and the slab extraction is performed so that the slab extraction is performed while minimizing the heat loss from the furnace. The present invention relates to a heat loss minimizing device.

In general, the heating furnace 200 for heating the rolled material such as slab is, as shown in Figure 1, the extractor 220 enters the interior through the extraction door 210 to the heated slab 230 to the outside. Will be extracted.

In this process, as shown in FIG. 2, the extractor 220 waits in a solid line on the outside of the heating furnace 200 while the extraction door 210 is closed, followed by a dotted line. When the extraction door 210 is opened halfway in the state, the extractor 220 advances, and when the extraction is completed, the extraction door 210 is completely opened. After that, the extractor 220 is slab (as shown in FIG. 3). 230, and then back again to complete the extraction from the heating furnace (200).

The half opening of the extraction door 210 in this process is a process that is performed to reduce the emission of the high heat in the heating furnace 200, and it is effective to block the heat emission to some extent than to open completely, but even heating There is still a lot of high heat emission from the furnace (200). In particular, since the extractor 220 enters the inside of the heating furnace 200 from the stand-by state long, the amount of heat emitted from the heating furnace 200 to the outside is very large even when the extraction door 220 is half open. .                         

In this process, when the internal heat of the furnace 200 is released to the outside, the amount of fuel loss increases, which is an important factor in which the cost increase of the furnace 200 is increased. In addition, when the amount of heat dissipation from the heating furnace 200 increases during the extraction of the slab 230 as described above, the temperature of the extracted slab 230 is lowered and the physical properties of the slab 230 are changed. It is not possible to maintain the proper temperature during the slab rolling of the, which leads to a decrease in the quality of the rolling, resulting in a problem that the quality of the finished slab is degraded.

Therefore, in the conventional slab extraction operation, a method of minimizing the emission of heat from the heating furnace 200 should be devised.

The present invention is to solve the conventional problems as described above, when extracting the slab heated in the heating furnace, instead of the process of opening the extraction door half open the extraction door to maintain a minimum open state, accordingly It is a first object of the present invention to provide a device for minimizing heat loss from a furnace when extracting slabs that can minimize the emission of heat from the furnace and reduce the factor of cost increase.

In addition, the present invention contributes to improving the quality of the slab by preventing the slab heating temperature drop due to the discharge of heat to the outside, and provides a device for minimizing the heat loss of the heating furnace during the slab extraction improved to achieve a smooth extraction of the slab Has a second purpose.

In order to achieve the above object, the present invention, in the device for minimizing the heat released to the outside when the slab heated in the heating furnace,

An extraction door configured to move up and down at the heating furnace entrance to open and close the heating entrance;

A door support means having a plurality of blocking plates disposed at a lower end of the entrance of the heating furnace and configured to move up and down, and having a link unit configured to interlock with the lifting operation of the extraction door;

When the extraction door is lowered and the barrier plate is raised, the penetrating means is formed in the extraction door so that the barrier plate is inserted into the extraction door side;

When the extraction door is lifted up from the door support means, through the penetrating means, the extractor enters the interior of the furnace and provides a device for minimizing heat loss during the slab extraction, characterized in that configured to extract the slab.

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

An apparatus 1 for minimizing heat loss of a heating furnace during slab extraction according to an embodiment of the present invention is shown in FIGS. 4 to 6 as a whole.

The apparatus 1 for minimizing heat loss of a heating furnace when extracting a slab according to an embodiment of the present invention includes an extraction door 10 that opens and closes the heating entrance and exit 205 by moving up and down at the heating entrance and exit 205.

In addition, the door support means 20 is disposed at the lower end of the entrance 205 of the heating furnace 200, and the door support means 20 is illustrated in FIGS. 6 to 8, and the heating furnace 200. And a plurality of blocking plates 22a and 22b, which are lifted up and down at the lower end of the entrance 205, and the lifting and lowering operation of the blocking plates 22a and 22b is performed by the extraction door 10. Built-in link unit 30 to be made in conjunction with the lowering operation.

The door support means 20 is formed for each of the guide spheres (26a, 26b) to the upper side to guide when the blocking plate (22a, 22b) is raised and lowered to both sides of the casing 24 of a predetermined size for this purpose Then, the blocking plates 22a and 22b are inserted therein and guided.

As illustrated in FIG. 7, the guide spheres 26a and 26b and the blocking plates 22a and 22b are formed at both edges p1 of a triangular cross section, for example, <<. The edges p1 of the triangular cross section coincide with the grooves p2 of the triangular cross section provided in the penetrating means 60 of the extraction door 10 to be described later, so that the guide spheres 26a and 26b and the blocking plate are provided. 22a and 22b effectively block heat dissipation between the extraction door 10.

As shown in FIG. 7, the casing 24 has a structure of a substantially hollow rectangular box shape, and a link part 30 as shown in FIG. 8 is provided inside the casing 24. The link unit 30 has a touch bar 34 vertically positioned at the center thereof, and a spring 36 is fitted at a lower end of the touch bar 34 to support the touch bar 34 upward. In addition, link members 38a and 38b, each of which is a linear member, are rotatably connected to both sides of the touch bar 34 so as to extend substantially horizontally, and at the centers of the link members 38a and 38b, respectively. The pins 40a and 40b are horizontally fitted so that both ends thereof are fixed to the side walls of the casing 24 to form hinge points 44, respectively.

In addition, the link members 38a and 38b are connected to the front end thereof, that is, the opposite end 48 of the end 46 connected to the touch bar 34 is connected to the lower connection end of the blocking plate 22a and 22b. It is connected to the pins 46a, 48a, etc. to be rotatable. Meanwhile, each of the link members 38a and 38b maintains the position of the hinge point 44 formed in the middle thereof close to the touch bar 34. That is, the length l1 from the hinge point 44 to the touch bar 34 is greater than the length l2 from the hinge point 44 to the connecting end 48 of the blocking plates 22a and 22b. short.

Due to this configuration, when the touch bar 34 is lowered around the hinge point 44, the link members 38a and 38b are raised to the side of the blocking plates 22a and 22b, and vice versa. When the (34) side is raised by the spring force of the spring 36, the blocking plates 22a and 22b are lowered in reverse.

In this case, the displacement of the blocking plates 22a and 22b is very large compared to the displacement of the touch bar 34. This is because the position of the hinge point 44 formed on the link members 38a and 38b is biased toward the touch bar 34 side, so that the blocking plate 22a can be moved up and down by a small stroke of the touch bar 34. ) 22b are raised and lowered greatly.

The upper and lower ends of the touch bar 34 are guided up and down by being inserted into upper and lower surfaces of the casing 24, and an upper end thereof protrudes a predetermined length toward the upper side of the casing 24. As described later, the upper end of the protruding touch bar 34 is pressed by the lower edge 10a of the extraction door 10 to the lower side, and when pressed, the touch bar 34 is pressed. ) Compresses the spring 36 while being inserted into the casing 24, and when the extraction door 10 is raised, the pressing operation of the touch bar 34 is stopped, and the touch bar 34 is moved by the spring 36. It will rise again.                     

In addition, the present invention forms a plurality of penetrating means 60 in the extraction door 10, respectively, and the penetrating means 60 has a lower end thereof opened toward the lower edge 10a of the extraction door 10. When the extraction door 10 descends and the blocking plates 22a and 22b are raised, the blocking plates 22a and 22b are inserted into the extraction door 10.

That is, the penetrating means 60 has a shape in which the blocking plate 22a is formed on each of the guide spheres 26a and 26b and the guide spheres 26a and 26b which are upwardly formed on both sides of the casing 24. This coincides with the shape formed when 22b is raised. This is made in the shape as shown in Figure 9, when the extraction door 10 is lowered to the upper side of the door support means 20, the penetrating means (60) in the guide sphere of the door support means (20) 26a) and 26b and the blocking plates 22a and 22b are inserted to block internal heat of the heating furnace 200 from being discharged to the outside.

In the slab extraction according to the present invention configured as described above, the apparatus for minimizing heat loss of a heating furnace 1 is lifted when the extraction door 10 is lifted up from the door support means 20, and the extraction door 10 is about halfway. The extractor 220 can enter the inside of the heating furnace 200 through the penetrating means 60 in a state in which the entrance 205 of the heating furnace 200 is closed and only slightly opened before being opened. It is operated to extract the slab 230 and to minimize the internal heat of the 200 is discharged to the outside.

That is, in the present invention, as shown in FIG. 5, the first extraction door 10 is closed by pressing the touch bar 34 of the door support means 20 by the lower edge 10a of the extraction door 10. The barrier plates 22a and 22b are lifted up by the link members 38a and 38b connected to the touch bar 34, respectively, and are fitted into the penetrating means 60 of the extraction door 10. The penetrating means 60 is blocked

At this time, the blocking plate (22a) (22b) and the guide sphere (26a) (26b) is a penetrating means of the extraction door (10) without twisting before and after by the structure of the triangular corner (p1) processed on the left and right sides thereof. Assembled in the groove (p2) provided in (60), the gap is minimized by the triangular corner (p1) and the groove (p2) to effectively block the heat radiation from the heating furnace 200 to the outside.

That is, in the state in which the extraction door 10 is completely lowered, the blocking plates 22a and 22b are fully raised to be assembled with the penetrating means 60 of the extraction door 10. The upper triangular corners (p1) are assembled in a set with the groove (p2) provided in the penetrating means 60 of the extraction door 10 by automatically matching the front and rear and left and right to minimize the gap between them to minimize heat dissipation Done.

In this state, when the extraction of the slab 230 is to be achieved, when the extraction door 10 is slightly opened, the touch bar 34 is raised by the force of the spring 36, and the link on the touch bar 34 side is performed. When the members 38a and 38b are raised, the position of the hinge point 44 in the middle of the link members 38a and 38b is short in the touch bar 34 side, and in the blocking plate 22a and 22b side. Since it is formed long, when the touch bar 34 is slightly raised, the blocking plates 22a and 22b are much lowered so that the blocking plates 22a and 22b are completely removed from the penetrating means 60 of the extraction door 10. It is lowered and inserted into the guide spheres 26a and 26b.

At this time, the extractor 220 is advancing into the penetrating means 60, as shown in Figure 5b), the entry position is the point where the blocking plate (22a, 22b) was located and blocked.

When the extractor 220 fully enters as described above, the extraction door 10 is raised again to be completely opened again, and the extractor 220 naturally lifts the slab 230 from the inside of the heating furnace 200 and FIG. 5C). As shown in, the slab extraction is made to the outside of the heating furnace (200).

In addition, when the extraction of the slab 230 is completed as described above, the extraction door 10 is closed again. At this time, as the extraction door 10 descends, the triangular corner p1 of the guide spheres 26a and 26b passes through the penetrating means. By the groove p2 of 60, the left and right are lowered to the correct position without being distorted, and when the closing is completed, the lower edge 10a of the extraction door 10 presses the touch bar 34.

Accordingly, the link members 38a and 38b connected to the touch bar 34 raise the blocking plates 22a and 22b side inversely and are inserted into the penetrating means 60 of the extraction door 10 and penetrate therethrough. The closing of the means 60 is complete.

In this process, the penetrating means 60 of the blocking plates 22a and 22b and the extraction door 10 are formed in a pair, respectively, so that the triangular edges p1 of the blocking plates 22a and 22b are penetrating means 60. The front and rear and right and left are automatically aligned along the triangular groove (p2) of the) to minimize gaps and minimize heat dissipation.

Although the above has been described in detail with respect to specific preferred embodiments of the invention, the invention is not limited thereto. Although those skilled in the art can make various modifications or equivalent structures of the present invention different from the above embodiments through the description of the specification or the drawings, these are all included in the technical idea of the present invention. In particular, the material change of the components of the present invention, the addition of a simple function, a simple shape change or a dimension change may be presented in various ways, but it is obvious that they are all included within the scope of the present invention.

      According to the present invention as described above, when the extraction of the slab 230 from the inside of the heating furnace 200, the extraction door 10 is removed half-opening process, and the extraction door 10 is minimized to open the penetration state By allowing the extractor 220 to enter the inside of the heating furnace 200 through the means 60, the gas consumption due to heat dissipation is greatly increased by minimizing the amount of heat emitted from the heating furnace 200 when the extractor 220 enters. It is possible to effectively reduce the cost increase of the heating furnace 200 operation accordingly.

      In addition, as the amount of heat emitted from the heating furnace 200 is greatly reduced when the slab 230 is extracted, the temperature change of the slab 230 to be extracted is effectively prevented to minimize the change of physical properties of the slab 230. In addition, it contributes to the improvement of the slab quality accordingly, and the effect of enabling the stable slab rolling in the subsequent process is obtained.

And, according to the lifting and lowering of the extraction door 10, the lowering and lowering of the blocking plate (22a, 22b) is made automatically can further reduce the amount of heat dissipation at the time of slab extraction, it is possible to achieve a smooth slab extraction operation will be.

Claims (7)

In the device for minimizing the heat released to the outside when extracting the slabs heated in the furnace, An extraction door configured to move up and down at the heating furnace entrance to open and close the heating entrance; A door support means having a plurality of blocking plates disposed at a lower end of the entrance of the heating furnace and configured to move up and down, and having a link unit configured to interlock with the lifting operation of the extraction door; When the extraction door is lowered and the barrier plate is raised, the penetrating means is formed in the extraction door so that the barrier plate is inserted into the extraction door side; When the extraction door is lifted from the door support means, the extractor enters the inside of the heating furnace through the penetrating means, it is configured to extract the slab, the apparatus for minimizing the heat loss of the heating furnace during the slab extraction.        According to claim 1, wherein the link unit is a touch bar is located in the center, the bottom of the touch bar is fitted with a spring to support the touch bar to the upper side, the link members are rotatably connected to both sides of the touch bar, A hinge point is formed at the center of the link member, and the link members are connected so that their front ends are rotatably connected to the lower connection end of the blocking plate, so that the touch bar is pressed downward by the lower edge of the extraction door. The touch bar is inserted into the casing to compress the spring, and when the extraction door is raised, the touch bar is raised and restored, characterized in that the heat loss of the heating furnace during the slab extraction.        According to claim 2, wherein each of the link members are formed in the length of the hinge bar in the middle of the hinge bar is shorter than the length from the hinge point to the connecting end of the blocking plate to the displacement that the touch bar is raised and lowered Compared to the slab plate is characterized in that the displacement of the rising and lowering slab extraction device characterized in that the heat loss of the heating furnace.        According to claim 1, The door support means for this purpose, when the blocking plate is raised and lowered to both sides of the casing of a predetermined size, respectively forming a guide sphere for guiding to the upper side, the blocking plate is fitted therein the upper and lower Device for minimizing heat loss of the furnace during extraction of the slab, characterized in that configured to be guided to. According to claim 4, wherein the guide sphere and the blocking plate each of the corners are formed in a triangular shape, these triangular edges are matched with the grooves provided in the through means of the extraction door, so that the guide sphere and the blocking plate between the extraction door and the A device for minimizing heat loss in a furnace during slab extraction, characterized in that it is configured to effectively block emissions.        6. The penetrating means according to any one of claims 1 to 5, characterized in that the shape of the penetrating means corresponds to a shape formed when each of the guide spheres formed on both sides of the casing toward the top and when the blocking plate is raised on the guide sphere. Heat loss minimization device of heating furnace for slab extraction.        The apparatus of claim 6, wherein the extraction door is opened, and the position at which the extractor advances and enters the penetrating means is a point where the blocking plate is positioned to block the penetrating means. .

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