JPS587693B2 - Scale ejection device for split type walking beam furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scale evacuation device for a split-type walking beam furnace.

Generally, in a heating furnace, scale generated on the surface of the treated material during heating may peel off and accumulate on the hearth surface, and may be fused and fixed by the heat in the furnace, corroding the hearth refractories.

Therefore, in a walking beam furnace, a scale trough (water seal tank) is placed in the furnace length direction on the moving beam support located at the lower end of the moving beam provided between the fixed beams.
A seal is attached to the hearth opening and immersed in water in the scale trough to seal the inside and outside of the furnace. A widely used method is to use a scraper attached to the bottom end of the plate to move the scale relative to the scale trough and discharge it out of the furnace.

Incidentally, in recent years, in order to enable various operating methods with one walking beam furnace, a split-type walking beam furnace has been proposed in which the moving beam is composed of a plurality of groups of moving beams that can be driven independently. .

As shown in FIG.
The moving beam groups A, B, and C are divided into three moving beam groups A, B, and C, and these are attached to moving beam supports 1a, 1b, and lc connected by a connecting means 2, and three conventionally known independent vertical drive mechanisms 3a,
3b and 3c can move up and down, while forward and backward movement is performed by one common forward and backward movement drive mechanism 4.

That is, by selecting the vertical drive mechanism 3, only the desired moving beam group is caused to perform each movement cycle of rising, advancing, descending, and retreating, and the material W is conveyed while being alternately replaced with the fixed beam 5 and the moving beam 6. It is something to do.

However, it is also possible to attach independent forward and backward drive mechanisms 4 to each of the moving beam supports 1a, 1b, and 1c so as to drive each moving beam group independently.

In this way, the split-type walking beam furnace has a plurality of independently driven zones 1, 1, 2, and 2.

In the split-type walking beam furnace configured as described above, since the moving beam group in each zone can be driven independently, it is not possible to provide a long scale trough extending from the extraction side to the charging side as in the conventional method.

Therefore, in order to provide a scale unloading device in this type of walking beam furnace, for example, as shown in FIG.
In addition, a scraper 9 is provided on the hearth 8, and the scale that has fallen into the scale trough is moved to the furnace charging side by the drive of the moving beam 6, and the scale generated from each zone is removed from each zone. It was necessary to collect it on the charging side and discharge it to the outside of the furnace using a conventionally known scale removing device 10 (Japanese Utility Model Publication No. 44-24168).

1 and 2, 11 is an opening for a moving post provided in the hearth 8, 12 is a moving post, 13 is a sealing plate attached to the opening 11, and a scraper 9 is attached to the lower end of the sealing plate.
is installed.

Even if the moving beam 6 rises and the scale trough 1 rises accordingly, the scraper 9 maintains an appropriate distance between the scraper 9 and the bottom of the scale trough, and the forward movement of the moving beam 6 causes the scraper to move upward. 9 sweeps out the scale deposited on the scale trough 7 in a direction opposite to the forward direction of the beam.

However, in the above configuration, the scale trough 7 and the scale removal device 10 must be provided for each band, which increases the construction cost.

Moreover, since the two scale eliminators 10 are located below the hearth, their drive mechanisms are easily damaged by radiant heat from the hearth wall, and installation and maintenance are also troublesome. has.

The present invention has been made in order to solve the above-mentioned problems in the scale discharge device of a split-type walking beam furnace. To provide a scale discharge device which allows scale troughs to have the same function as a series of scale troughs and can extremely easily discharge scales that have fallen onto each hearth on a charging side.

Next, the present invention will be explained according to the embodiments shown in FIG. 3 and below.

Figure 3 shows the main parts of the scale discharge device of the present invention.
The moving beam support of each zone has a scale trough 20 consisting of one main body part 21 and one connecting part 22, and the scale trough bodies of the third zone and the second zone, and the scale trough bodies of the second zone and the first zone. The sections 21 are connected by a scale trough connection section 22, and the scale is fed into the scale trough of the first zone through each scale trough body and the scale trough connection section, and functions as if it were a series of scale troughs. It is designed to be effective.

That is, as shown in FIG. 4, the charging side of the scale trough main body 21a of the third zone (2) bends due to lateral force and extends laterally to the scale trough main body 21b of the second zone (2). A trough connecting portion 22a is provided.

As shown in FIG. 5, the bottom plate 23 of the bent portion is inclined downward, and the scale sent from the main body 21a is removed from the bottom plate 23 of the bent portion by the action of a scraper 30, which will be described below. Due to the inclination, it falls into the connecting portion 22a.

In addition, as shown in FIG. 6, the scale trough connecting portion 22a has a bottom plate 24 that is tilted upward toward the charging side from the once depressed position, and the scale trough 22 in the second zone
It is located at a position slightly higher than the highest position of b, and has an input port 25 at this position.

Further, a gutter-shaped connecting plate 26 is swingably attached to the tip of the scale trough connecting portion 22a by a hinge mechanism 27, and the tip of the connecting plate 26 is attached to the side wall of the scale trough main body 2lb of the second zone (3). placed on top;
Even if the second zone (2) and the third zone (2) move up and down relative to each other, the connection plate 26 swings to follow the movement as shown in FIG.

In addition, 29 is a seal plate attached to the hearth opening 28,
30 is a scraper attached to the lower end of the seal plate, 31 is a moving post, 32 is a scraper attached to a leg piece 33 suspended from the hearth beam 8, and the leg piece 33 is attached to the scale trough as shown in FIG. The length is shortened according to the inclination of the connecting portion bottom plate 24.

The scale trough 20b of the second band H is also exactly the same as that of the third band (2), but the first band I located at the final end
The scale trough has only the scale trough main body, and its bottom plate gradually slopes upward on the charging side, and has the same structure as the scale trough connection part 22, and the scraper is also shortened to correspond to the slope of the bottom plate. It has become.

Therefore, when the split walking beam furnace configured as described above is operated, scale generated during the operation process falls into the scale trough body 21 through the opening 28 and is deposited at the bottom.

On the other hand, during rectangular movement of the moving beam, especially when moving forward, the scale trough 20 moves forward together with the moving post 31, so the scraper 30. 32 is located close to the bottom plate of the scale trough main body 21 and the connecting portion 22, and is apparently the fourth
Since the scale retreats to the dashed line in the figure, the scale moves toward the furnace charging side accordingly, and when it reaches the bending part, the bottom plate 23
The scale reaches the scale trough connecting part 22 by the inclination of the scale trough, where it is again moved by the scraper 32 and transferred from the opening 25 to the scale trough main body part 21 of the next order.

In this way, the scale trough opening end of the first band I is finally introduced into and discharged from the packet (not shown).

Note that the above explanation is for the case where the moving beam groups in each band move only horizontally and independently vertically, and all the moving beam groups move in a rectangular manner. If there is no vertical movement, the scale will not move in the relevant band, but will move during the next drive.

In addition, in the case of a type in which the moving beam groups independently move horizontally and vertically, as shown in FIG.
If the connecting plates 20c are arranged with a sufficient distance 1 so as not to interfere with each other, the connecting plate 26 will follow the scale trough main body 21 by sliding and swinging on the side wall, and the scale will be discharged as described above. It is.

Furthermore, the scale within the scale trough of the first band I is
It may be discharged to the outside of the furnace using a known scale removing device as disclosed in the above-mentioned Japanese Utility Model Publication No. 44-24168.

As is clear from the above description, in the present invention, independently. In a split-type walking beam furnace that has a plurality of moving beam groups to be driven, a scale trough is provided on the moving post support of each zone, and each one of these roughs is connected at the scale trough connection part so that it can always be followed, as if it were a series of moving beams. Since it performs the same function as a scale trough, there is no need to install a scale removal device under the hearth in each zone, and there is only one scraper drive mechanism or no scraper drive mechanism, so the overall cost is low. The scale discharge device can also be easily maintained.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of a conventional split-type walking beam furnace equipped with a scale evacuation device using the conventional method.
The figure is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a sectional view similar to FIG. 2 in the case where the split type walking beam furnace of FIG. Figure 4 is the third
5 is a sectional view taken along line B-B in FIG. 4, FIG. 6 is a sectional view taken along line C-C in FIG. 4, and FIG. 7 is a sectional view taken along line D--
8 is a sectional view showing an embodiment in which the first zone I and the second zone (2) or the second zone (3) and the third zone (3) are subjected to separate longitudinal strokes. 1 (1a', 1b, 1c)...Moving beam support body, 3 (3a, 3b, 3c), 4-...-Drive device,
5... Fixed beam, 6... Moving beam, 20 (20a, 20b, 20c)... Scale trough, 21... Scale trough main body, 2
2...Scale trough connection part, 26...1.
・Connection plate, 30, 32... Screver, 28・
...Opening, 31...Moving post, 1, I
I, I...Band.

Claims (1)

[Scope of Claims] 1. In a divided walking beam furnace consisting of a plurality of groups of moving beams that can be driven independently, a scale trough consisting only of the main body is provided on the charging side unit moving beam support, and each of the remaining units Each of the moving beam supports is provided with a scale trough consisting of a main body and a connecting member, and the bottom plate of the scale trough connecting part is inclined upward as it reaches the scale trough main body of another zone located on the charging side, A swingable connection plate at the end of the connection part is positioned on the scale trough main body of the other band, and the scales that have fallen into the scale trough due to the rectangular movement of the moving beam are sequentially moved by a scraper to the unit moving beam on the charging side. A scale discharge device for a split walking beam furnace, characterized in that the scale is moved to a scale trough provided on a support and discharged from the furnace. 2. The split-type walking system according to claim 1, wherein the bottom plate of the scale trough main body provided on the charging side unit moving beam support body is inclined upward as it approaches the charging side. Beam furnace scale ejector.