JPH06445Y2 - Heat shield for roll chamber of continuous vertical heat treatment furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a heat shield for a roll chamber of a continuous vertical heat treatment furnace.

(Problems to be solved by conventional techniques and devices) Conventionally, in a continuous vertical heat treatment furnace in which a plurality of rolls are provided in the upper and lower parts of the furnace and the steel strip is conveyed by the rolls and heat treated by a burner or the like, However, the roll is abnormally overheated by the radiant heat from the burner and the strength of the roll itself is lowered. In addition, the roll has a crown shape to prevent meandering of the steel strip, but if there is a large temperature difference between the portion of the roll that contacts the steel strip and the portion that does not contact it (for example, the furnace charging side), this temperature difference Due to this, the crown shape is deformed, so that there is a drawback that it does not perform a sufficient meandering prevention function.

Therefore, conventionally, a heat shield made of a refractory heat insulating material is fixedly installed just below and above the roll to prevent radiant heat from a burner or the like.

However, since the heat shields are provided only below and above the rolls, there is a large gap between the heat shields, and radiant heat to the rolls cannot be sufficiently prevented.

To solve this, a heat shield may be provided except for the passage of the steel strip, but this way, even if the ceiling bung of the furnace is removed at the time of maintenance, etc. It was impossible to enter, and it was the current situation that the heat shield was installed only just below and just above the roll.

Therefore, it is an object of the present invention to provide a heat shield that can enter the inside of the furnace, although the heat shield is provided not only below and above the roll.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the present invention provides a continuous vertical heat treatment furnace in which a steel strip is conveyed through a plurality of rolls provided in the upper and lower parts of the furnace. At least the upper part, except for the steel strip passage, is provided with a heat shield made of a refractory heat insulating material to form a roll chamber, the heat shield facing the roll is fixed, and the other heat shields can be tilted upward. Is a heat shield for a roll chamber of a continuous vertical heat treatment furnace.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view of an upper portion of a continuous vertical heating furnace in which the present invention is implemented, 2 is a detachable ceiling bung forming a ceiling wall of the heating furnace 1, 3 is a roll, 4 is the roll 3 It is a heat shield group consisting of a refractory heat insulating material provided below.

The heat shield group 4 includes a fixed heat shield 4A located directly under the roll 3 and tilting heat shields 4B provided on both sides of the fixed heat shield 4A. In addition, 5 is a passage of the steel strip S.

The fixed heat shield 4A is fixed to the bracket 6 provided on the side wall of the furnace by a bolt (not shown).

On the other hand, as shown in FIGS. 2 and 3, the tilting heat shield 4B is rotatably supported by shaft members 7 provided on the bracket 6 on both sides at one end, and the bracket 6 at the other end. It is placed on top. A fixing pin 8 is provided on the hinge portion of the tilting heat shield 4B, and a hanging metal fitting 9 is provided on the free end side of the tilting heat shield 4B.

Then, the roll chamber 10 includes the heat shield group 4, the ceiling bung 2, the heat shield group 4, and the hearth.
And each roll 3 is located in the roll chamber 10.

Since the heat shield group 4 has the above-mentioned configuration, if it is necessary to enter the furnace for maintenance now,
As in the conventional case, the ceiling bung 2 is removed by a crane or the like not shown. Then, after appropriately pulling out the fixing pin 8 of the tilting heat shield 4B, the hook of the crane is hooked on the hanging metal fitting 9 and pulled up, and the tilting heat shield 4B is tilted upward by 90 °. After that, the wire is hung on the hanging metal fitting 9, and the bar 11 is temporarily installed on the ceiling wall portion.
The wire is fixed to. Then, maintenance is performed by entering the furnace through the opening of the tilting heat shield 4B.

When the maintenance and the like are completed, the tilting heat shield 4B may be returned to the original state by the operation reverse to the above.

In addition, in the said Example, although the upper roll 3 side was described, you may comprise similarly about a lower roll side.

(Effect of the Invention) As is apparent from the above description, according to the present invention, the roll chamber is formed by providing a heat shield made of a refractory heat insulating material at least in the upper part of the furnace except for the steel strip passage, so that the roll radiates heat. Can be well protected from.
Moreover, since a part of the heat shield is a tilting heat shield that can be tilted upward, by tilting this tilting heat shield, for maintenance and the like,
Workers can enter the furnace.

[Brief description of drawings]

FIG. 1 is a sectional view of an upper portion of a continuous vertical heating furnace embodying the present invention, and FIGS. 2 and 3 are sectional views of a tilting heat shield. 1 ... Heating furnace, 2 ... Ceiling bung, 3 ... Roll, 4 ... Heat shield group, 4A ... Fixed heat shield, 4B ... Tilt heat shield, 6 ... Bracket, 7 ... Shaft member, 8 ... Fixed pin, 9 ... Hanging metal fitting 10 ... Roll chamber.

Claims (1)

[Scope of utility model registration request] 1. A continuous vertical heat treatment furnace in which a steel strip is conveyed through a plurality of rolls provided in upper and lower parts of the furnace, and a plurality of refractory heat insulating materials is provided in at least an upper part of the furnace except a steel strip passage. For forming the roll chamber by providing the heat shield of the above, fixing the heat shield facing the roll, and allowing the other heat shield to tilt upward, for the roll chamber of the continuous vertical heat treatment furnace Heat shield.