JPH11236624A - Vertical type continuous heat treatment furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical type continuous heat treatment furnace which can exchange a chamber in a short time. SOLUTION: In the vertical type continuous heat treatment furnace which arranges a cooling chamber adjoined with the lower part of a heating chamber 10 provided with the chamber 14 for blowing hot blast into the inner part of the furnace body 4 and executes the heat treatment while conveying a metallic strip 3 in the heating chamber 10 and the cooling chamber, the heating chamber 10 is partitioned to each zone and an openable/closable window part 5 is provided in the furnace body 4 in each zone, and the chamber 14 is provided so as to be freely attached/detached at the inside of the window part 5. A shifting means for shifting the window part 5 is provided at the outside of the furnace body 4 and the window part 5 in the furnace body 4 can be opened/closed to the outside. Further, a turning shaft 6 extended in the width direction of the window part 5 is provided at the lower part of the window part 5 and supported so as to be possible to turn to the furnace body 4 and the upper part of the window part 5 is arranged so as to be opened in the diagonal direction toward the outside of the window part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical continuous heat treatment furnace for performing heat treatment while continuously transporting a metal strip.

[0002]

2. Description of the Related Art Conventionally, vertical continuous heat treatment furnaces have been used for annealing, solution-treating and brightening these metal strips such as stainless steel plates, copper plates and various alloy plates. In these vertical continuous heat treatment furnaces, for example, a cooling chamber is provided adjacent to and below the outlet side of a direct-fired heating chamber.
Further, a seal chamber is provided above the entrance side of the heating chamber, and a seal chamber is provided on the exit side of the cooling chamber. The heat treatment is continuously performed while the metal strip is transported from above to below in the heating chamber and the cooling chamber.

[0003] Such a vertical continuous heat treatment furnace is provided with a plurality of fans in a heating chamber and a chamber for blowing hot air onto a metal strip and a direct fire burner.

[0004]

When such a vertical continuous heat treatment furnace is used for a certain period of time, the chamber provided in the heating chamber is deteriorated, and the chamber must be replaced. However, when trying to replace a deteriorated chamber,
The furnace body above the zone to which the chamber to be replaced is attached is sequentially removed for each zone, and the deteriorated chamber is pulled out and replaced.

In order to replace the chamber in this manner, a space is required to place the removed furnace body. In addition, it takes too much time to remove or assemble the furnace body. Therefore, an object of the present invention is to provide a vertical continuous heat treatment furnace capable of replacing a chamber in a short time.

[0006]

According to the first aspect of the present invention, a cooling chamber is provided adjacent to and below a heating chamber having a chamber for blowing hot air inside a furnace body. In a vertical continuous heat treatment furnace for performing heat treatment while transporting a metal strip in a chamber and a cooling chamber, the heating chamber is partitioned into zones, and the furnace body is provided with a window that can be opened and closed in each zone, The chamber is detachably provided inside the window, and a moving means for moving the window outside the furnace body is provided, and the window of the furnace body can be opened and closed outward.

[0007] According to the first aspect of the present invention, by opening the window of the furnace body of the zone to be replaced to the outside, the chamber provided inside the window is easily lifted by a crane or the like for replacement. can do. Further, since the window is only opened outward, it is not necessary to remove the furnace body in the upper zone. Therefore, the chamber can be replaced in a short time.

According to a second aspect of the present invention, in the vertical continuous heat treatment furnace of the first aspect, the moving means includes a rotating shaft extending in a width direction of the window below the window. It is characterized in that the furnace body is rotatably supported so that the upper part of the window is opened obliquely to the outside of the furnace body.

According to the second aspect of the present invention, the chamber can be replaced simply by opening the upper part of the window obliquely outward, so that the chamber can be replaced in a shorter time.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing a main part of a vertical continuous heat treatment furnace, FIG.
(B) is an AA sectional view of (a).

As shown in FIG. 1, a vertical continuous heat treatment furnace 1
Are the heating chamber 10, the cooling chamber 20, the sealing chambers 15, 30
And the duct 40. The heating chamber 10 has an inlet and an outlet, and a cooling chamber 20 is provided adjacent to and below the outlet side. Further, a sealing chamber 15 is provided at an entrance side above the heating chamber 10 and a sealing chamber 30 is provided at an outlet side below the cooling chamber 20.
Is provided.

The heating chamber 10 includes first to fourth zones. Each zone is provided with a refractory inside the furnace body, and a chamber 14 and fans K for sending gas for blowing out from the chamber 14 are provided. It is prepared for. Further, direct fire burners 13 are provided in the second to fourth zones, respectively.

As shown in FIG. 2, two openable and closable windows 5 are provided for each zone so as to face the furnace body 4 of the heating chamber 10. The moving means of the window 5 includes a rotating shaft 6 extending in the width direction of the window 5 below the window 5. The rotating shaft 6 is rotatably supported by the furnace body 4. The upper part of the window 5 is provided so as to open diagonally outside the furnace body 4 as shown on the right side of the drawing.

A puller 5a is provided above the window 5, and a stopper 8 is provided below the window 5, respectively. A hanging hand 14 a is attached above the chamber 14, and the supporting portion 9 supports the chamber 14 on the window 5. The cooling chamber 20 is provided adjacent to the exit side of the heating chamber 10. Further, a cooler 23, a plurality of chambers 14, and a fan K for sending gas for blowing out from the chamber 14 are provided in a cooling chamber 20 formed of an iron plate.

The upper seal chamber 15 is provided with the heating chamber 10.
Is formed by an iron plate adjacent to the entrance side of the main body.
A pair of rubber seal rolls 16 rotating in different directions are provided on the inlet side of the seal chamber 15, and a pair of rubber seal rolls 17 rotating in different directions are provided on the outlet side.

The lower seal chamber 30 is provided with a cooling chamber 20.
The inner space 32 is extended so that the lower end of the seal chamber 30 is extended, and the lower end 31 of the seal chamber 30 is immersed in water in an aqueous layer to be sealed. Further, the inner space 32 is provided with a seal nozzle 33 for injecting a seal gas obliquely downward on both surfaces of the metal strip 3 passing therethrough.

The seal nozzle 33 is attached to the lower end of the cooling chamber 20 by extending the lowermost chamber 14 in the cooling chamber 20 downward. Further, a seal gas regenerating device 35 forming a box shape is provided on the outside thereof. A filter formed of a wire mesh or a filling which can be ventilated is attached to the lower surface of the box type. Further, a plurality of water spray nozzles for jetting downward above the filter are provided. Further, a discharge hole 29 for sending the seal gas in the regenerating device 35 into the cooling chamber 20 is provided.

The duct 40 includes a suction duct 41 and blowing ducts 46 and 47. Suction duct 4
1 sucks combustion exhaust gas (atmosphere gas) from the cooling chamber 20. Further, a regeneration device 42 having a cooling device and a fan 43 having a VVVF are provided in the suction duct 41.

The blowing duct 46 is connected to a branch point 45.
The suction duct 41 and the heating chamber 10 are connected via the. The blowing duct 46 is for blowing the combustion exhaust gas after regeneration into the heating chamber 11. The blowing duct 47 connects the suction duct 41 and the seal chamber 15 via the branch point 45. This is also for blowing the combustion exhaust gas after regeneration into the seal chamber.

The valve 52 is connected to the blowing duct 46.
And the valve 53 is attached to the blowing duct 47, respectively. The gas flow rate can be adjusted by the valves 52 and 53 and the fan 43 having VVVF.

Next, the replacement operation of the chamber according to the embodiment of the present invention will be described. When the operation is stopped, as shown on the right side of FIG. 2, a towing tool such as a crane is hooked on the puller 5a of the window portion 5 to pull the window portion 5 open diagonally outward. Next, the lifter 14a of the chamber 14 that has come out of the furnace body is lifted by a crane, the chamber 14 is pulled out obliquely, taken out of the furnace body 4, a new chamber 14 prepared is inserted, and the chamber 14 is replaced. I do. Next, the exchange of the chamber 14 is completed by closing the window 5.

As described above, by opening the window 5 of the furnace body 4 in the zone to be replaced to the outside, the chamber 14 provided inside the window 5 can be easily lifted and replaced by a crane or the like. be able to. Further, since only the window 5 is opened outward, it is not necessary to remove the furnace body in the upper zone. Therefore, the chamber 14 can be replaced in a short time.

Further, since the chamber 14 can be replaced simply by opening the upper part of the window 5 outward, the chamber 14 can be replaced in a shorter time. As described above, the embodiments of the present invention have been described. However, various embodiments can be made without departing from the spirit of the present invention. For example, as shown in FIG. 3, the window 51 may be opened in the lateral direction with the arm 50 provided.
Further, as shown in FIG. 4, a carriage 55 may be provided and the window 56 may be retracted and opened with the window 56 kept upright.

In FIGS. 3 and 4, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing a main part of a vertical continuous heat treatment furnace according to an embodiment of the present invention.

FIGS. 2A and 2B show a main part of opening and closing a window according to the embodiment of the invention, wherein FIG. 2A is a plan sectional view, and FIG.

FIG. 3 is a cross-sectional plan view illustrating a main part of opening and closing a window according to another embodiment of the invention.

FIG. 4 is a vertical sectional view showing a main part of opening and closing a window according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Vertical continuous heat treatment furnace, 3 ... Metal strip, 4 ... Furnace body, 5 ... Window part, 6 ... Rotating shaft, 10 ... Heating chamber, 14 ... Chamber, 20 ... Cooling chamber.

Claims (2)

[Claims] 1. A vertical type in which a cooling chamber is provided adjacently below a heating chamber having a chamber for blowing hot air inside a furnace body and a metal strip is conveyed through the heating chamber and the cooling chamber. In the continuous heat treatment furnace, the heating chamber is partitioned for each zone, a window portion that can be opened and closed on the furnace body is provided for each zone, and the chamber is detachably provided inside the window portion. A vertical continuous heat treatment furnace, comprising: moving means for moving the window outside the window, wherein the window of the furnace body can be opened and closed outward. 2. The method according to claim 1, wherein the moving means includes a rotating shaft below the window portion extending in a width direction of the window portion, and the rotating shaft is rotatably supported by the furnace body. The vertical continuous heat treatment furnace according to claim 1, wherein the furnace is provided so as to open obliquely outside the body.