JPS6261090B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat treatment apparatus for a coiled object to be heated, such as a metal strip wound into a coil or a wire coil.

Conventionally, in order to heat and uniformly heat a coiled object to be heated (hereinafter referred to as a coiled object), the coiled objects are placed side by side in a heating/uniforming chamber so as to have a circular plane position, and the coiled objects are placed side by side in a circular plane position in a heating/heating chamber. Hot air is blown from installed circulation fans, but when multiple circulation fans are installed next to each other on the ceiling, the hot air stirred by these fans interferes with each other. As a result, hot air was not uniformly applied to the coiled material, which had the disadvantage of adversely affecting heat treatment.

The present invention has been made for the purpose of solving the above-mentioned drawbacks and heating a plurality of coiled objects arranged side by side in a heating/soaking chamber or a cooling chamber as uniformly as possible.

An embodiment of the present invention will be described below with reference to the drawings. This heat treatment apparatus consists of an insertion device A for coiled articles a, a, a, a heating and soaking chamber B, and a cooling chamber C. First, the insertion device A will be briefly explained. A horizontal shaft 3, which is rotatably supported on the table 1 by bearings 2, 2, supports a turntable 4 having a square side surface at its corner.
It is configured to be able to stand up or fall horizontally or horizontally by operating the .
A pair of pillows 6, 6 are provided on one side of the turntable 4 so that the coiled material a can be stably placed thereon, and rollers 7, 7, . . . are pivotally supported on the other side. Each of the rollers 7, 7, 7, . . . is driven by a chain transmission to a motor 8. Reference numeral 9 denotes a long movable frame, and an endless chain 12 is stretched between sprockets 10 and 11 which are pivotally supported at the front and rear ends of the frame.
A pusher 13 is fixed to a part of the frame, and when the chain 12 rotates, the pusher 13 can be moved back and forth on the movable frame. 14, 14 are roller conveyors installed in parallel on both sides of the movable frame 9. The sprocket 10 at the front end of the movable frame 9 is provided on a support shaft 15, and the support shaft 15 is connected to fixed bearings 16,1.
6 is rotatably supported. The rear end of the movable frame 9 is supported by a cylinder 17, so that the movable frame 9 is tilted up and down about the support shaft 15 by the operation of the cylinder 17. The support shaft 15 is linked to a motor 18 with a reduction gear. For this reason,
By contracting the cylinder 17 and tilting the rear end of the movable frame 9 downward, the pusher 13 is moved onto the roller conveyors 14 and 1.
4, the cylinder 5 is extended and the turntable 4 is overturned as shown by the arrow, and the coiled material a on the pillow materials 6, 6 is transferred to the rollers 7, 7, 7. ...supported through tray b above.
And rollers 7, 7, 7... and roller conveyor 1
The coil-shaped object a is rotated by driving each roller 4 and 14.
to the front. Then, the cylinder 17 is extended and the pusher 13 is transferred to the roller conveyors 14, 14.
The coiled objects a, a, a are pushed and inserted into the heating/soaking chamber B by moving the pusher 13 in the direction of the arrow shown by the circulation of the chain 12. It is.

The heating/soaking chamber B is constructed with an insulating furnace wall, and on the floor, narrow roller rollers 21 are laid in three rows, and the coiled materials a, a, a pressed by the pusher 13 are Tray b is placed on the roller roller 21.
Supported through. Reference numeral 22 indicates the entrance door, and 23 indicates a cylinder that opens and closes the entrance door by moving it up and down. The heating/soaking chamber B is large enough to accommodate three coiled objects a, and circulation fans 24a, 24b, and 24c are placed directly above the coiled objects a, a, and a, respectively. provided. 25
a, 25b, 25c are the circulation fans 24a, 2
Loopers 26a, 26b, and 26c are provided between the coiled objects a, a, and 4b, 24c, and motors for rotating the respective circulation fans are shown. Reference numeral 27 denotes an inner cover provided so as to surround both sides of the coiled objects a, a, and a, and outside the inner cover and inside the furnace side wall, there are inner covers corresponding to the three coiled objects a, a, and a. Radiant tube 28 as a heating source
a, 28b, and 28c are provided. 29a,
29b, 29c are the radiant tubes 28a,
A recuperator for preheating combustion air in burners 28b and 28c is shown. In this invention, the circulation fans 24a, 24b, 24c have rotary blades twisted in opposite directions, and the adjacent circulation fans 24a, 24b, 24c are rotated in opposite directions by the motors 26a, 26b, 26c. Rotate in the direction. That is, for example, when the circulation fan 24b in the middle is rotated clockwise, the circulation fans 24a, 24c adjacent to both sides thereof are rotated counterclockwise.
The rotating blades of each circulation fan are twisted so that the hot air is uniformly blown downward from the circulation fans 24b and 24c.
It is different from 24c. Therefore, the hot air blown downward from each circulation fan 24a, 24b, 24c is diffused by passing through the loopers 25a, 25b, 25c, and evenly hits the coiled objects a, a, a from the upper surface and heats them. Furthermore, the hot air swirls to the outside of the inner cover 27 on the floor surface, receives radiant heat from the radiant tubes 28a, 28b, and 28c, and rises through the passage, and the circulation fan 24a,
It is recirculated at 24b and 24c. A thermocouple (not shown) is provided for each circulation fan, and the temperature of the hot air in the heating/soaking chamber can be detected for each circulation fan, and the detection signal is used to connect the corresponding radiant tube. 28a, 28b, 28
Control the amount of radiant heat c. If the temperature of the jet sprayed onto each coiled object is controlled for each circulation fan in this manner, there will be no difference in heating temperature between the coiled objects.

Next, the cooling chamber C formed subsequent to the heating/soaking chamber B will be explained. The heating/soaking chamber B and the cooling chamber C are separated by an intermediate door 31. 32
is the chain wheel that suspends the intermediate door,
By rotating the chain wheel, the intermediate door 31 moves up and down to open and close. On the floor of the cooling chamber C, there is a drive roller 3 to which a heat-resistant steel flange 33 is fixed.
4, 34, . The cooling chamber C is also large enough to accommodate three coiled objects a, and each coiled object a, a, a is placed on the ceiling.
The circulation fans 36a, 36
b, 36c are provided. 37a, 37b, 37
c is a looper provided between each of the circulation fans 36a, 36b, 36c and the coiled objects a, a, a;
Reference numerals 8a, 38b, and 38c are motors for driving each of the circulation fans. Reference numeral 39 indicates an inner cover surrounding both sides of the coiled objects a, a, a, and 40 indicates a cooler provided outside the inner cover. Even in the case of this cooling chamber, the circulation fans 36a, 36b, 36c have rotating blades twisted in opposite directions to each other, and the motors 38a, 38
b and 38c to rotate in opposite directions.
Then, the cold air blown downward from each circulation fan 36a, 36b, 36c is sent to the looper 37a, 37b, 3
7c to diffuse the coiled material a,
Spray evenly onto a and a from above to cool them. The cold air is circulated to the outside of the inner cover 39 and cooled through the cooler 40, and is cooled by the circulation fan 36.
a, 36b, and 36c. Reference numeral 41 indicates an exit door of this cooling chamber, and 42 indicates a cylinder that opens and closes the exit door by moving it up and down.

A table 43 with rollers for supporting the coiled materials a, a, a extracted from the cooling chamber C is provided outside the exit door 41.

As described in the embodiments above, the heat treatment apparatus of the present invention has a plurality of circulation fans installed on the ceiling of a heating/soaking chamber or a cooling chamber, each of which has rotary blades twisted in opposite directions. By rotating them in opposite directions, hot or cold air is blown out from all the circulation fans in the same direction, so if the rotational directions were the same, the whirlwind would collide at the middle of each circulation fan. However, according to the present invention, even if the circulation fans are installed close to each other, there is little mutual interference, so the wind does not hit the coiled object equally due to mutual interference. A coiled object can be equally heated or cooled at the same time. In addition, by providing a circulation fan for each coiled object, the intense jet from the circulation fan is directly blown onto each coiled object, increasing the convection effect, so each coiled object is heated in a short time. Alternatively, it has advantages such as being able to be cooled and having a uniform temperature distribution.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention.
2 is a longitudinal sectional view, FIG. 3 is a sectional view taken along the line X--X in FIG. 2, and FIG. 4 is a sectional view taken along the Y--Y line in FIG. 2. A...Charging device, B...Heating/soaking chamber, C...Cooling chamber, a...Coil-shaped object, b...Tray, 24a, 24
b, 24c...Circulation fan, 26a, 26b, 26
c...Motor, 28a, 28b, 28c...Radiant tube burner (heat source), 36a, 36b,
36c...Circulation fan, 38a, 38b, 38c...
motor.

Claims (1)

[Scope of Claims] 1. A heating/soaking chamber or a cooling chamber in which a plurality of coiled objects can be arranged side by side in a planar circular position is formed, and a circulation fan is installed in each of the ceilings of the heating/soaking chamber or the cooling chamber. A plurality of circulation fans are provided directly above the coil-shaped object so as to correspond to each other, and each of the circulation fans has rotary blades twisted in opposite directions to each other so that adjacent ones rotate in opposite directions. Heat treatment equipment for coiled materials. 2. A thermocouple is provided for each circulation fan, the temperature of the hot air in the heating/soaking chamber is detected for each circulation fan, and the heating source provided for each circulation fan is controlled. A heat treatment apparatus for coiled objects according to claim 1.