JPS6114436B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a so-called atmospheric furnace in which the furnace is filled with a gas other than air, such as nitrogen or an inert gas, in a blast furnace, annealing furnace, etc. The purpose is to do it perfectly.

Therefore, the main feature of the present invention is to provide a double door mechanism at the inlet and outlet of the furnace.

To explain one embodiment of the present invention shown in the drawings, a charging chamber 2 for charging a workpiece is provided at the inlet of a furnace 1, and a hopper 3A is attached to an outer opening 2a of the charging chamber 2. A sliding door 3 is provided, and the sliding door 3 is opened and closed by a piston 4A actuated by the pressure inside the cylinder 4. A damper type door 5 is provided at the inner opening 2B of the charging chamber 2, and a piston 6C is provided near the inner opening 2B via a piston 6A and a connecting rod 6B that are actuated by the pressure inside the cylinder 6. A charging pusher 7 is provided which is reciprocated. Inside the furnace 1 is a conveyor 3 for transporting the charged workpieces. A take-out chamber 9 is provided at the outlet of the furnace 1 to take out the workpiece through a funnel part 9C, and damper-type doors 10, 1 are provided at the inner and outer ports 9A and 9B of the take-out chamber 9, respectively.
1 are provided, respectively, and the damper doors 10, 11 are opened and closed by pistons 12A, 13A operated by the pressure of cylinders 12, 13. Reference numeral 14 denotes a basket installed directly below the outer opening 9B of the take-out chamber 9.

In the furnace 1, the slide door 3 and damper type doors 5, 10, 11 are closed and the hopper 3 of the slide door 3 is closed.
When a workpiece is placed in A and the piston 4A is actuated to move the slide door 3 to the dotted line position, the workpiece falls into the chamber from the outer opening 2a of the charging chamber 2. If the slide door 3 is closed again by operating the piston 4A, and the damper type door 5 is opened, and the charging pusher 7 is pushed to the dotted line position by operating the piston 6C via the piston 6A and connecting rod 6B, the inside of the chamber is The objects to be treated fall onto the conveyor 8 inside the furnace 1. At this time, the interior of the furnace 1 is isolated from the outside air by the sliding door 3. The objects to be treated that have fallen onto the conveyor 8 are transported by the conveyor 8, subjected to heat treatment, and then fall into the funnel portion 9C of the take-out chamber 9. Next, when the piston 12A is actuated to open the damper door 10, the object to be processed falls into the take-out chamber 9.

When the object to be processed is taken out and dropped into the chamber 9, the damper type door 10 is closed, and the damper type door 11 is opened by the piston 13A to extract the object to be processed into the basket 14. In this case, Damba style door 10
The inside of the furnace 1 is isolated from the outside air.

It is preferable that the sliding door 3 and damper type doors 5, 10, and 11 be interlocked to prevent two or more from being opened at the same time.

As mentioned above, the furnace of the present invention is equipped with a sliding door with a hopper on the outside of the charging chamber, so the hopper is filled with the workpiece in advance, and the workpiece is loaded into the chamber at the same time as the sliding door is opened. It can be made to fall. Further, since a damper type door is provided at the inner opening of the charging chamber, when the workpiece is dropped into the chamber, the damper type door can be closed to shut off outside air from the furnace. Further, when the damper type door is opened to allow the workpiece to fall into the furnace, the sliding door can be closed to isolate the inside of the furnace from the outside air. Additionally, damper-type doors are provided at the inner and outer ports of the take-out chamber, so that the inside of the furnace can be kept isolated from the outside air even when extracting the material to be processed inside the furnace. As a result, the amount of gas used for the atmosphere in the furnace can be reduced by half compared to a system in which a double door structure is provided only at the inlet. Further, since the damper type door opens and closes by rotating around the rotation axis, the structure of the automatic opening/closing mechanism is extremely simple and easy to control automatically.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of the present invention. In the figure, 1...Furnace, 2...Charging chamber, 2A...Outer port, 2B...Inner port, 3...Sliding door, 3A...Hopper, 5, 10, 11...Dumper type door, 9...Takeout chamber, 9A... Inner opening, 9B...outer opening.

Claims (1)

[Claims] 1 A charging chamber is provided at the inlet to charge the material to be processed, the outer opening of the chamber is blocked by a sliding door with a hopper, the inner opening is blocked by a damper type door, and the material to be processed is inserted into the outlet. A take-out chamber is provided, and both the inner and outer ports of the chamber are isolated from the outside air by a damper type door that is opened and closed by a piston operated by pressure inside the cylinder. Atmosphere furnace.