JPH0734313Y2 - Vertical pine full furnace - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vertical pine-furnace furnace for continuously heat-treating a strip material.

[Conventional technology]

As a vertical pineapple furnace of this kind, for example, a cylindrical pine cone through which the strip running upward penetrates is inserted into the cylindrical furnace body, and combustion is performed by a burner in the combustion space between the furnace body and the pine tree, A furnace having a structure in which combustion gas after pineapple heating is sucked out of the furnace by an exhaust blower is used. In this pineapple furnace, the pine tree supported and suspended in the upper part expands and contracts significantly due to thermal expansion during operation and permanent strain (elongation) accumulation due to repeated operations. An annular seal member made of ceramic fiber or the like that is in sliding contact with the outer periphery of the pine cone is attached to the lower end to provide a gas seal between the combustion chamber and the outside of the furnace.

[Problems to be solved by the device]

However, since the above sealing material does not have sufficient elasticity, it is difficult to obtain a uniform sealing effect in the circumferential direction of the pine cone, and the draft effect and the suction effect of the exhaust blower cause the cool air outside the furnace to escape from the seal part. Is easily sucked into the furnace, and at this time, the pineapple is locally cooled unevenly in the circumferential direction, resulting in uneven internal stress in the circumferential direction.
There is a problem that the pine wall portion near the seal portion is largely deformed, and since the cold air is sucked from the outside of the furnace, the thermal energy becomes negative.

This invention solves the above-mentioned conventional problems, and improves the gas sealability in the pineapple penetration portion at the lower end of the furnace body, preventing cold air from entering from the pineapple penetration portion and eliminating deformation of the pine cone. The purpose is to provide a vertical pine full furnace that can be used.

[Means for Solving the Problems]

However, the vertical pine-furnace furnace of the present invention is a vertical pine-furnace furnace in which the pine cone is suspended by penetrating the furnace main body, and is vertically expanded and contracted between the lower end portion of the furnace main body and the lower end portion of the pine full. It is characterized in that a bellows-shaped gas seal material is attached.

[Action]

In the vertical pine-furnace furnace of this invention, the bellows-like gas seal material expands and contracts vertically to ensure a gas seal between the lower end of the furnace main body and the pine cone against vertical movement of the lower part of the pine cone due to thermal expansion. , Prevents cold air from entering the furnace through the pineapple penetration portion at the lower end of the furnace body.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, 1 is a vertical pine-furnace furnace, which comprises a furnace body 2 and a pine cone 3 which penetrates the furnace body 2. The furnace body 2 is a base 4
It is erected on the top and the upper end of the pineapple 3 is suspended by a frame 5. Reference numeral 6 is a slit-shaped charging port through which the strip 7 passes, and 8 is a sealing device. Further, 9 is an extraction port to which a chamber 10 forming a cooling zone is connected.
Reference numeral 11 denotes an air blower for exhaust, and a burner for heating is provided on the wall portion of the furnace body 2, but its illustration is omitted.

On the other hand, 13 is a bellows-shaped gas seal material that can be expanded and contracted in the vertical direction, and is an annular fitting 14 fixed to the lower end 2a of the furnace body 2.
And an upper end and a lower end thereof are attached to an annular mounting member 16 attached to the lower end flange 15 of the pineapple 3, respectively. The bellows-shaped gas sealing material 13 is a glass fiber sheet coated with aluminum and has heat resistance and sealing properties, and heat resistant steel rings 17 and 18 are attached for reinforcement. 19 is a guide rod that is vertically fixed to a base not shown,
A plurality of (four in this embodiment) are arranged with a small clearance with respect to the outer periphery of the bellows-shaped gas sealing material 13.
Further, 21 is a heat sealing device which is in sliding contact with the outer periphery of the pineapple 3,
A sealing material 22 made of ceramic wool is laminated in an annular shape between a short cylindrical body 23 fixed to the bottom of the furnace body 2 and the outer periphery of the pine cone 3, and a holding plate 24 is fastened with a stud bolt 25 and a nut. It is a thing.

In the vertical pine-furnace 1 having the above-mentioned configuration, even if the pine cone 3 expands and contracts due to the operation of the furnace, the bellows-shaped gas seal material 13 also expands and contracts therewith to ensure a gas seal between the furnace main body 2 and the pine cone 3. However, cold air is prevented from being sucked into the furnace from the pine full through hole 26 of the furnace body 2. As a result, it is possible to prevent excessive deformation of the pine wall portion due to uneven inflow of cold air in the conventional furnace as shown by the chain line 27 in FIG. 2 and accompanying damage to the refractory material 28 for forming the charging port 6. be able to.
Further, the guide rod 19 prevents the bellows-shaped gas seal material 13 from expanding and contracting and excessively laterally moving due to external pressure. Then, the heat sealing device 21 blocks radiant heat radiated from the high temperature furnace through the pine through hole 26, and also suppresses hot air blowout from the pine through hole 26 portion to deteriorate the overheating of the bellows-shaped gas sealing material 13. In addition to the above, the pineapple 3 is brought into contact with the outer circumference of the pineapple 3 to prevent rolling.

The present invention is not limited to the above embodiment, and for example, the heat sealing device 21 may have another structure or may be omitted.

[Effect of device]

As described above, according to the present invention, the bellows-shaped gas sealing material expands and contracts together with the pine cone to provide a gas seal between the lower end of the furnace body and the pine cone. Can be prevented, and the pineapple deformation accident caused by cold air can be eliminated.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vertical pine full furnace showing an embodiment of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the same main part. DESCRIPTION OF SYMBOLS 1 ... Vertical pine-furnace furnace, 2 ... Furnace main body, 2a ... Lower end part, 3 ... Matsufuru, 13 ... Bellows-shaped gas seal material, 14 ... Mounting metal fittings, 15
… Bottom flange, 16… Mounting bracket.

Claims (1)

[Scope of utility model registration request] 1. A vertical pine-furnace furnace in which a pine cone is hung through a furnace body, and a bellows-like gas sealing material which vertically expands and contracts between a lower end portion of the furnace body and a lower end portion of the pine cone. A vertical pineapple furnace equipped with.