JPS60187618A - Heat sealing device of walking beam type heating furnace - Google Patents

Abstract

PURPOSE:To shield the aperture of a hearth even in any operation stage of a movable beam post provided with a heat shielding plate to cover the aperture in the down position of the movable beam by providing the heat shielding plate which acts similarly in the up position of the movable beam to said beam post. CONSTITUTION:A movable beam post 5 penetrates through a hearth aperture 7 provided to a hearth 6 so as to support a movable beam in a furnace A, is supported to a carriage 8 on the outside B of the furnace and is designed to apply rectangular motion to the movable beam in the furnace A. An upper heat shielding plate 9 covering the furnace inside A in the aperture 7 in the down position of the movable beam is provided to the upper part of the post 5. A lower heat shielding plate 10 is provided to the lower part of the post 5 in the position lower by as much as the lifting stroke of the post 5 from the furnace outside B of the aperture 7 in the down position of the beam. The plate 10 covers the furnace outside B of the aperture 7 by maintaining always the min. gap alpha even during the time when the post 5 ascends and moves right after moving left. The heat loss in the furnace is thus decreased.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an A-king beam type heating furnace, and particularly relates to a movable beam post that passes straight through from the frontage of the hearth and supports a movable beam in the furnace, and the hearth. This invention relates to an improvement in a heat sealing device with an opening.

[Technical background of the invention and its problems] Generally, in an A-king beam heating furnace, the first
As shown in the figure, a rectangular motion is applied to the movable arm to transport the steel billet while heating it.

By the way, as shown in the figure, since there is a movement stroke between Δ-)]3 and C→D in the rectangular motion, there is a clearance between the movable beam post that supports the movable beam and the opening for passing it through. It is necessary to take

Therefore, conventionally, as shown in FIG. 2, a 1'' portion 3 between the hearths corresponding to the movement stroke of the movable beam post 2 is provided in the hearth 1 to ensure the movement of the movable beam.

However, with such a structure, the inside of the furnace Δ always communicates with the outside of the furnace B through the hearth opening 3, so there is a drawback that heat loss is extremely large.

For this purpose, as shown in FIG. 3, a heat shielding plate 4 is provided on the inside Δ side of the movable beam post 2 to cover the hearth frontage 3, and the hearth 1 It has also been considered to maintain the minimum gap α to reduce heat loss.

However, even with this structure, the rectangular motion requires d3G (C → 1) because the stroke of the movable beam rises and the gap α with the hearth 1 surface increases (α + stroke 1).
), it was not always possible to exhibit sufficient effects.

OBJECT OF THE INVENTION] This invention was made in view of the above circumstances, and its purpose is to shield the frontage of the hearth during any of the operating processes of raising, lowering, advancing, and retracting the movable beam post. A. To obtain a heat sealing device for a king beam heating furnace, which can reduce heat loss as much as possible.

[Summary of the Invention] In order to achieve the above object, the present invention provides a movable beam post that supports the movable beam through a hearth opening in order to give a rectangular motion to the movable beam in the furnace. The present invention is characterized in that an upper heat shielding plate is provided to cover the inside of the hearth at the hearth opening, and a lower heat shielding plate is provided to cover the outside of the hearth at the frontage of the hearth at a position above the movable beam. This allows the movable beam boss to move without any gap between it and the hearth opening, and prevents the heat inside the furnace from escaping from the hearth opening to the outside of the furnace.

[Embodiments of the Invention] Hereinafter, a preferred embodiment of a heat sealing device for a walking beer heating furnace according to the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 4, 5 is a movable beam boss, which is installed on the hearth 6 to support a movable beam (not shown) in the furnace A.
) through the hearth opening 7. C1 is supported by a truck 8 outside the furnace B, and is configured to give rectangular motion to the movable beam inside the furnace A. At the upper part of the movable beam post 5 that supports the movable beam, the movable beam is placed between the hearths [1
An upper heat shielding plate S) is provided to cover the Δ side of the furnace interior of the section 7. This -L section shielding plate 9 is provided with a minimum gap α between it and the hearth 6 surface. In addition, at the lower position of the movable beam at the lower part of the movable beam boss 5, the lower heat shielding plate 10 is located below the movable beam boss! Minimum gap α between the raised position of the movable beam and the 6th surface of the hearth
The area between the hearth [1 part 7 is designed to cover the outside B side of the hearth. This lower heat shielding plate 1.0 is provided with a water seal which is submerged in a sealing water tank 11 provided for atmosphere sealing on the outside 13 side of the furnace during the movement of the movable beam up and down.
2 is provided. Therefore, the lower heat shielding plate 10 has both functions of heat shielding and atmosphere sealing.

Note that 13 in FIG. 4 is a water seal trough extending from the edge of the hearth opening 7 on the outside B side to the sealing water tank 11.

The operation of this embodiment having the above configuration will be described.

In FIG. 4, a movable beam boat 1-
5 repeats rectangular motion as shown in Figure 5, and
The steel pieces are transported by a movable beam.

Now, at position A in FIG. 5, the movable beam post 5 is in the state shown in FIG. Tokonoma [1 part 7
is covered. Incidentally, the minimum gap α is usually 10 to 50 mm.

Next, the movable beam post 5 moves from the operating diagram rΔ in FIG. 5 to B, and at position B it is in the state shown in FIG. 6. During this time,
The upper heat shield plate 9 always maintains the minimum gap α between the hearth 6 and the hearth! 7 is covered to prevent heat from inside the furnace A from going out to outside the furnace B.

Furthermore, the movable beam post 5 is operated according to the operation diagram C'B-+ in FIG.
It rises to position C, and at position C it is in the state shown in FIG. At this time, the upper heat shielding plate 9 moves in synchronization with the movable beam post 5, and the upper heat shielding plate 9 moves in synchronism with the movable beam post 5, so that the upper heat shielding plate 9 moves in synchronism with the movable beam post 5 and moves as follows. As a result, the upper heat shielding plate 9 is moved from the hearth 6 surface to the movable beam boss 5, where the heat in the furnace can escape from the stroke α.
The Ic lower heat shielding plate 10 installed at the bottom of the furnace also rises at the same time, and this covers the outside B side of the hearth frontage 7 with the minimum gap α. Escape is prevented.

Next, the raised movable beam boss i~5 moves to C10 in the operational diagram of FIG. 5, and conveys the steel piece during this movement process. During this time, the lower heat shielding plate 10 always covers the outside B side of the hearth (-1 section 7) while maintaining the minimum gap α. This is shown in FIG.

The movable beam post 5 is D-= in the operating diagram of FIG.
It descends to Δ and returns to its original position.

In this way, the movable beam post 5 has the above-mentioned rectangular movement IJ.
The billet is conveyed while repeating J (Δ→13-n C-D-)Δ). During the entire cycle of this movement, the hearth opening 7 of the king beam heating furnace is movable. Since the beam post 5 is covered with two upper and lower heat shield plates 9 and 10 with a minimum gap α, heat loss from inside the furnace Δ can be suppressed to a minimum. At the same time, the water seals 1 to 12 of the lower heat shielding plate 10 are connected to the seal water tank 11.
Since the atmosphere is submerged in the hearth 6, the atmosphere of the hearth 6 can be sealed.

[Effects of the Invention] In summary, the present invention provides the following excellent effects.

(1) Since the movable beam post is provided with an upper heat shield plate and a lower heat shield plate, the frontage of the hearth is shielded even when the movable beam post is in the operating process of TR, lowering, advancing, and retreating. Thereby, the heat loss flowing out from inside the furnace can be reduced as much as possible.

(2) Heat loss can be effectively prevented with a simple structure of adding a lower heat shield plate to the movable beam post.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the operation of the movable beam, Figs. 2 and 3 are both a conventional heat sealing device for a walking beam type heating furnace, and Fig. 4 is a diagram showing a heat sealing device for a walking beam type heating furnace according to the present invention. Schematic sectional view showing a preferred embodiment, fifth
The figure is an explanatory diagram of the operation of the movable beam, and Figures 6 to 8 are the 5th
In the figure, 5 is a movable beam post, 7 is a frontage of the hearth, 9 is an upper heat shield plate, 10 is a lower heat shield plate, A is inside the furnace, and B is a state explanatory diagram at each operating point in the figure. It is outside the furnace. Patent applicant: Ishikawajima-Harima if>

Claims (1)

[Claims] A movable beam post supporting the movable beam at the frontage of the hearth in order to impart rectangular motion to the movable beam in the furnace;
An upper heat shielding plate that covers the inside of the hearth opening in the lowered position of the movable beam, and a lower heat shielding plate that covers the outside of the hearth opening in the raised position of the movable beam. A heat sealing device for a walking beam heating furnace.