JP3158506B2 - Vertical coil heat treatment furnace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical coil heat treatment furnace for heat-treating a coil-shaped object to be heated, which is formed by winding a band-shaped metal member such as a metal strip, a wire or a metal foil into a coil, by blowing hot air. Things.

[0002]

2. Description of the Related Art For example, an object to be heated in which a metal strip is wound in a coil shape (hereinafter, referred to as a coil-shaped object to be heated) is charged into a furnace as it is, and hot air is blown onto the furnace to perform annealing or the like. The conventional batch coil heat treatment furnace that performs heat treatment
A large inlet for charging the coil-shaped object to be heated into the furnace is formed on one side wall of the furnace body, and a charging space is provided outside the inlet.

[0003]

However, in the conventional coil heat treatment furnace, as described above, a large charging opening is opened in the furnace side wall, and the coil-shaped heat target is charged into the furnace.
Each time a coiled object is charged or extracted into the furnace, most of the high-temperature gas in the furnace is discharged to the outside through the charging port, so that thermal energy and atmospheric gas are wasted and waste. However, there is a problem that a large charging space for holding the coil-shaped heat-receiving object in front is required.

[0004]

SUMMARY OF THE INVENTION A vertical coil heat treatment furnace according to the present invention is intended to solve the above-mentioned problems. A circulation fan is provided on a ceiling, and a side wall of the furnace is supplied with air by the circulation fan. A furnace body provided with a nozzle for blowing gas, an opening / closing door provided so as to slide horizontally on the floor of the furnace body, and a furnace body formed below the furnace body with the opening / closing door interposed therebetween. A charging chamber, a lifter provided in the charging chamber and capable of moving the coil-shaped heat target up and down in the furnace, and a lifter provided when the coil-shaped heat target is charged into the furnace. By supporting both ends of the central shaft, the coil-shaped object to be heated can be horizontally supported in the furnace.

[0005]

[Function] Since the floor of the furnace body is only opened when charging and extracting the coil-shaped object to be heated into the furnace, the high-temperature gas in the furnace hardly leaks out. In addition, since the charging room can be formed underground, space can be saved.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
The furnace body 1 is formed in a cubic shape by heat-insulating walls, and an inner case 3 made of heat-resistant steel is provided in the furnace body 1 so that a circulation path 2 is formed between the furnace body 1 and the inner wall surface. I have. Reference numeral 4 denotes a circulation fan provided on the ceiling so as to suck the atmospheric gas in the inner case 3; 5, a motor provided on the furnace body 1 for rotating the circulation fan 4;
Are radiant tube burners, and are nozzles provided on the side wall of the inner case 3.

In the floor of the furnace 1, an inlet 8 is formed, and an opening / closing door 9 is provided so as to slide horizontally.
A charging chamber 10 is formed below the furnace body 1 with the opening / closing door 9 interposed therebetween. That is, two parallel lower beams 11, 11 are provided from both bottom sides of the furnace body 1 to the outside of the furnace.
Rails 12 and 12 are provided on inner surfaces of the doors 1 and 11, and rollers 13 that can roll on the rails 12 and 12 protrude from both side edges of the door 9. 14 designates the opening / closing door 9 as the rail 1
An endless chain wound and stretched between sprockets 15, 16 to slide horizontally along 2, 12,
A part of the endless chain 14 is connected to the door 9 via a connecting member 17.

[0008] A sealing plate 18 is provided integrally on the upper surface (inner surface) of the opening / closing door 9 so as to be airtightly attached to the peripheral edge of the charging port 8. Rails 12 are provided on both side edges of the door 9.
The support shafts 19, 19 are supported in parallel with the support shafts 12, and the support shafts 19, 1
9 are provided with rollers 20, 20 protruding above the rails 12, 12, and levers 22, 2, which are fixed to the support shafts 19, 19, respectively.
2, cylinders 21 and 21 are provided.
When the spindles 19, 19 are rotated by the operation of the above, the rollers 20, 20 are lowered, and as a reaction thereto, the opening / closing door 9 is lifted and the sealing plate 1 is lifted.
8 is configured to be attached to the periphery of the charging port 8.

A lifter 23 is provided in a charging chamber 10 formed below the furnace body 1, that is, in the basement. The lifter 23 is configured such that its X-legs are opened and closed by the operation of the cylinder 24 to move the table 25 up and down. A rail 26 is laid on the table 25, and the rail 26 is lowered. Sometimes, it is linearly connected to a rail 28 provided in an underpass 27 so that a bogie 29 can move from the rail 28 to the rail 26. Trolley 29
On the top, a pair of columns 30, 30 is established, and the columns 30, 3
The coil-shaped heat target 31 is supported on both ends of the central axis 32 on the center 0 so that it can be supported horizontally.

Reference numerals 33, 33 denote supporting devices provided on both side walls of the furnace body 1 facing each other.
The bearing pieces 34, 34 are provided on the lower edge of the bearing pieces 34, 3
The legs 35, 35 are tilted inward with the fulcrum 4 as a fulcrum.
And a support shaft 3 which can be advanced and retracted by the operation of cylinders 36 and 36 so as to penetrate both side walls of the furnace body 1.
7 and 37, and the distal ends of the support shafts 37 and 37 are connected to the connection shaft 38,
38, and are connected to the supporting legs 35, 35, and the supporting shafts 37, 3
7 move forward and backward, and the supporting legs 35, 35
It is configured such that it can be tilted with 4, 34 as a fulcrum.

In the vertical coil heat treatment furnace configured as described above, the coil-shaped heat target 31 is placed on the columns 30, 30 of the carriage 29.
To transfer the carriage 29 from the rail 28 of the underground passage 27 to the rail 26 of the table 25, thereby preparing the coil-shaped heat-receiving object 31 in the charging chamber 10, and then circulating the endless chain 14. Then, the door 9 is slid horizontally along the rails 12 and 12 by pulling the door 9 horizontally to open the loading opening 8. Then, the lifter 23 is operated to raise the carriage 29, and the coil-shaped heat target 31 is charged into the furnace. Then, the cylinders 36, 36 are operated to support the legs 35, 3
If the bogie 29 is lowered after tilting the inward direction of the coil 5, both ends of the central axis 32 of the coiled object 31 are supported by the legs 35, 3.
The coil-shaped object to be heated 31 rides on the support 5 and is horizontally supported in the furnace. Then, after the bogie 29 is further lowered, the endless chain 14 is turned over and the opening / closing door 9 is horizontally moved to close the loading port 8, and the cylinders 21, 21 are operated to lower the rollers 20, 20 onto the rails 12, 12. Then, the sealing plate 18 of the opening / closing door 9 is attached to the periphery of the loading port 8 to close the loading port 8 in an airtight manner.

Atmosphere gas is supplied into the furnace body 1 and the radiant tube burners 6 and 6 are burned to rotate the circulation fan 4 to circulate the atmosphere gas inside the furnace body 1 so that the nozzles 7, 7. By blowing the high-temperature gas toward both end surfaces of the object to be heated 31, the coil-shaped object to be heated 3
Heat 1 When the intended heat treatment was completed in this way, the charging port 8 was opened, the cart 29 was raised into the furnace, and
When both ends of the central shaft 32 are received by 0 and 30, the support shafts 37 and 37 are pulled to raise the support legs 35 and 35 toward the wall, and the carriage 29 is lowered to place the coiled heat-receiving object in the charging chamber 10. 31 is extracted.

In this embodiment, the case where the coil-shaped object 32 is heated by hot air has been described. However, by providing a cooler instead of the radiant tube burners 6 and 6, the coil-shaped object 31 is blown with cold air. The technical idea of the present invention can be applied as it is even when cooling.

[0014]

As described above, in the vertical coil heat treatment furnace of the present invention, the coil-shaped heat-receiving object is loaded into the furnace from the loading chamber formed below the furnace body provided with the opening / closing door on the hearth. High temperature gas inside the furnace does not easily leak out even if the inlet is wide open, so that the loss of atmospheric gas and the loss of heat energy during charging and extraction can be greatly reduced. Reduce running costs. Also,
Since the object to be heated can be charged from underground, there is an advantage that a wide charging space is not required in front of the furnace body as in the related art, and the ground can be widely used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a vertical coil heat treatment furnace of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Furnace body 4 Circulation fan 7 Nozzle 8 Loading port 9 Opening / closing door 10 Loading room 23 Lifter 31 Coiled heat object 32 Central axis 33 Supporting device 35 Support

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-263089 (JP, A) JP-A-3-17492 (JP, A) JP-A-3-285732 (JP, A) JP-A-4- 268186 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C21D 1/00, 9/675 F27B 3/02, 5/06 F27B 5/12, 5/13

Claims (1)

(57) [Claims] 1. A furnace body provided with a circulation fan on a ceiling portion and a nozzle on a side wall for blowing out gas in the furnace sent by the circulation fan, and a horizontal slide on a floor portion of the furnace body. Opening and closing door, a charging chamber formed below the furnace body with the opening and closing door interposed therebetween, and a coil-shaped object to be heated provided in the charging chamber is moved up and down into the furnace. A lifter provided on the opposite sides of the furnace body and supporting both ends of the central axis of the coiled object when the coiled object is charged into the furnace. A vertical coil heat treatment furnace comprising a supporting device capable of horizontally supporting an object in the furnace.