JPS5825278Y2 - Furnace door tightening device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a furnace door tightening device suitable for large furnaces such as vacuum drying furnaces used in manufacturing large equipment such as large capacity transformers. .

Generally, this type of large furnace has a large opening at the front for carrying in equipment, and when this opening is closed with a door, it is necessary to obtain sufficient airtightness.

Conventional devices of this type include those that fasten the area around the door to the furnace body using a large number of bolts, or those that attach a pressure lever to the furnace body or the door and push or rotate the pressure lever to attach the door to the furnace body. There are things that press the.

However, in such a tightening device, all the tightening work is done manually, which makes the work cumbersome, the workability is poor, and there are drawbacks such as difficulty in tightly tightening large doors.

An object of the present invention is to provide a furnace door tightening device that eliminates the above-mentioned drawbacks by performing the door tightening operation using two fluid pressure cylinders.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a furnace body, and an opening 1a is formed in the front surface (lower surface in the case of illustration) of this furnace body.

On the front surface of the furnace body 1, a single-opening door 3 is arranged, one widthwise end of which is hinged to the furnace body 1 with a shaft 2 to a hinge fitting provided on the left side of the furnace body 1. There is.

Gaskets 4, 4 are interposed between the periphery of the opening 1a of the furnace body 1 and the door 3, and these gaskets ensure airtightness within the furnace.

5 is a side surface 1 opposite to the surface on which the shaft 2 of the furnace body 1 is provided;
b is an L-shaped arm with one end pivotally supported via a bracket 6; 7 is a first fluid pressure cylinder such as a hydraulic cylinder whose rear end is pivotally supported on a support member 8 fixed to the side surface 1b; The tip of the piston rod 7a of the cylinder 7 is pivotally supported by the free end of the arm 5.

At the free end of the arm 5 is a pressing tool holding member 1 consisting of a channel material 9 and an arm 10 fixed to the channel material.
1 is fixed, and a second fluid pressure cylinder 12 such as a hydraulic cylinder is pivotally supported at the tip of the arm 10.

A pressing member 13 that contacts the peripheral edge of the front surface of the door 3 is fixed to the tip of the piston rod 12a of the cylinder 12, and the cylinder 12 and the pressing member 13 constitute a pressing tool 14.

A plurality of pressing tools 14 are provided at predetermined intervals in the height direction along the widthwise side edge of the furnace body 1, and the fluid pressure cylinders 7 and 12 of each pressing tool are simultaneously activated by fluid pressure. It is designed to be driven.

In the embodiment described above, when opening the door 3, the hydraulic cylinder 12 is operated by an operation valve (not shown) to retract the piston rod 12a, and then the hydraulic cylinder 7 is operated to retract the piston rod 7a.

As a result, the arm 5 rotates in the direction of arrow A shown in FIG. 1, and the pressing tool 14 moves away from the door 3 and retreats to the side of the furnace body.

In this state, the door 3 can rotate about the shaft 2 and can be opened and closed freely.

Next, in order to close the door 3 and tighten it to the furnace body 1, the first fluid pressure cylinder 7 is operated by an operation valve (not shown) to extend the piston rod 7a, and the arm 5 is moved in the direction of arrow B shown in FIG. The fluid pressure cylinder is stopped when the arm 5 is rotated and becomes substantially parallel to the side surface 1b.

In this state, the other second fluid pressure cylinder 12 is operated to extend the piston rod 12a, and the pressing member 13 is moved to the door 3.
Press to tighten the door 3 to the furnace body 1.

Although the above embodiment has been described assuming that the door is one-sided, the present invention is not limited to this, and the present invention can be applied to doors with any mounting structure.

Moreover, it goes without saying that the number of door tightening devices is not limited to one, but two or more can be provided.

As described above, according to the present invention, the arm pivotally supported on the furnace body is moved closer to the door by the first fluid pressure cylinder, and the second fluid pressure cylinder attached to the free end side of the arm is moved closer to the door. Because it is pressed, the door can be automatically tightened to the furnace body, and even large doors can be easily tightened tightly to the furnace body to ensure airtightness. There are advantages.

[Brief explanation of drawings]

The figure is a partially sectional plan view of the device of the present invention. 1... Furnace body, 3... Door, 5, 15.
... Arm, 7 ... First fluid pressure cylinder, 12 ... Second fluid pressure cylinder.

Claims (1)

[Scope of utility model registration request] In a furnace door tightening device that presses a door that closes an opening of the furnace body against the furnace body at least in one place, the furnace door tightening device is arranged on the side of the door and rotates in a direction toward and away from the iron door. an arm pivotally supported on the furnace body so as to move the door; a first fluid pressure cylinder provided to rotate the arm; and a first fluid pressure cylinder provided at the free end of the arm to press the door. A furnace door tightening device comprising two fluid pressure cylinders.