JPH08185970A - Supplying electrode preparing device for fusion furnace - Google Patents

Abstract

PURPOSE: To provide a device for preparing a supplying electrode to be used in an electric fusion furnace such as arc furnace so that it can be easily lifted by an electrode replenishing device. CONSTITUTION: A holder 30 capable of arranging a plurality of electrodes 12 in horizontally aligned state is provided in such a manner as to be capable of vertically standing and tilting, and a lock piece 36 for preventing the rotation of each electrode 12 is provided on a holder 30. A locking guide cylinder 38 is fixed so that the holder 30 is situated just above each electrode 12 when laid in the vertically standing state, and an electrode replenishing device 11 is suspended in the guide cylinder 38 so that a plug 24 can be screwed to the electrode 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preparing a replenishing electrode for use in an electric melting furnace such as an arc furnace.

[0002]

2. Description of the Related Art Since an artificial graphite electrode used in an arc furnace is consumed by use, it is necessary to add a new electrode to the upper end of the electrode in use. Is, for example, Japanese Patent Publication No. 56-24358.
It is known from Japanese Utility Model Publication No. 3-130196.

By the way, these electrode connecting devices are provided with telescopic cylinders extending in multiple stages like a telescope on the outer periphery of the device main body in order to prevent them from rotating, and the telescopic cylinders are extended downward so that their lower ends are electrodes. The rotation torque is applied to the telescopic cylinder by engaging the gripping device or fixing the telescopic cylinder to the crane. As a result, the apparatus main body becomes large and heavy, resulting in high manufacturing cost and a problem that a large crane is required for lifting.

Further, conventionally, the work of screwing the plug of the electrode connecting device into the replenishing electrode for hoisting the electrode by a crane has been carried out only manually. That is, the conventional electrode connecting device is provided with a handle for manually rotating the plug, and the replenishing electrodes are arranged side by side on the tray so that the plug is turned sideways and screwed into the screw hole of the electrode. Since this requires the work of lifting the robot, it requires manpower and time for connection, and also requires dangerous work in a high temperature environment. Also,
In this way, since the replenishing electrode that is placed horizontally is hoisted by the wire rope of the crane, the electrode greatly swings in the air, which is dangerous.

[0005]

DISCLOSURE OF THE INVENTION The replenishing electrode preparation device for a melting furnace of the present invention is intended to solve the above-mentioned conventional problems and enable further mechanization and automation of the electrode replenishment work. is there.

[0006]

To this end, a replenishing electrode preparation device for a melting furnace of the present invention is provided with a holder capable of vertically arranging and tilting a plurality of electrodes arranged side by side in an aligned state. A lock piece for preventing rotation of each electrode is provided on the holder, and a rotation preventing guide cylinder is fixedly provided so as to be positioned directly above each electrode when the holder is in a vertical standing state, and an electrode connecting device is provided. It is characterized in that the plug is hung in the guide cylinder so that the plug can be screwed into the electrode.

[0007]

[Operation] The electrode is erected by the holder and stands by in a vertically erected state, the electrode connecting device is suspended in the guide cylinder, and the torque actuator provided in the electrode connecting device rotates the plug to semi-automatically plug the electrode. It can be screwed in and is ready to be lifted without the need for manpower.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will now be described with reference to the drawings. FIG. 1 shows the whole of the apparatus, in which 1 is a melting furnace and 2
Is an electrode holding device for holding an electrode 3 hanging in the melting furnace 1, 4 is a fixed frame constructed so as to surround the melting furnace 1, and 5 is fixed to the fixed frame 4 directly above the electrode 3. A guide tube 6 is provided with a garter 7 movably along the ceiling rails 8 and an overhead crane 10 is provided with a wire winding device 9 movably provided on the garter 7. The wire rope suspended from the take-up device 9, 11 is an electrode connecting device suspended by the wire rope 10, 12 is a supplementary electrode suspended by the electrode connecting device 11, and 13 is a storage cylinder. is there.

Reference numeral 30 denotes a plurality of (six in the figure) electrodes 12
Is a holder having an L-shaped cross section, which can be arranged side by side in an aligned state. The holder 30 is supported on the fixed frame 4 via a support shaft piece 31, and the cylinder 32 is expanded and contracted to move the support shaft piece 31. It is provided so that it can be vertically erected and tilted about the fulcrum. A lock bar 34 is pivotally supported by a fulcrum 35 on the front surface of the holder 30 so as to be opened and closed by a cylinder 33, and a lock piece 36 is moved forward and backward by the operation of an electromagnetic solenoid 37 on the lock bar 34. The side surfaces of each electrode 12 are brought into contact with each other to prevent their rotation.

Reference numeral 38 denotes a guide tube fixedly mounted on a fixed frame 4 by a stand 39 so as to be positioned directly above each holder 30 in a vertically standing state. The inner peripheral surface of the guide tube 38 has an internal tooth shape. A large number of vertical grooves 40 are formed in the.

The electrode replenishing device 11 is composed of a plurality of cylinders 1 radially arranged on an upper portion of a cylindrical case as shown in FIGS.
8 is fixed, and a claw 19 is fixed to the piston rod end of each cylinder 18, and by extending the cylinder 18, the claw 19 can be projected radially outward from the outer periphery of the electrode connecting device 11. Has become. It should be noted that, like the guide cylinder 38, a large number of vertical grooves 20 are formed on the inner surface of the guide cylinder 5 in the shape of internal teeth.

A cylindrical body 22 is swingably supported by a universal joint 21 on the lower half portion of the electrode joint device 11, and a torque actuator 28 is fixedly mounted on the cylindrical body 22, and a rotary shaft of the torque actuator 28. 23 is supported by a bearing 29 provided in the cylindrical body 22, and a plug 24 is fixed to the lower end of the torque actuator 28.

In the thus prepared preparation device, the replenishing electrodes 12 are carried by a crane or the like and arranged on the holder 30 which is tilted in the horizontal direction as shown in FIG. 3, and the lock bar 34 is placed thereon. 4 and the lock piece 36 is projected by the electromagnetic solenoid 37 to fix each electrode 12 onto the holder 30 so that it cannot rotate, and the cylinder 32 is extended to vertically move the holder 30 as shown in FIG. Stand up. Then, the wire winding device 9 is operated to lower the electrode connecting device 11 to hang it down in the guide cylinder 38, match the plug 24 with the screw hole of the upper end portion of the electrode 12, and operate the cylinder 18. By projecting the claws 19 outward and engaging the claws 19 with the vertical grooves 40 of the guide cylinder 38, the electrode joint device 11 is prevented from rotating.

Then, the torque actuator 28 rotates the plug 24 to screw the plug 24 into the screw hole of the electrode 12. After the claw 19 is contracted and the lock piece 36 is released, the electrode take-up device 11 is lifted by the wire winding device 9 to lift the electrode 12, and the electrode take-up device 11 is placed in the storage cylinder 13. It is housed to prevent its swinging, and the wire winding device 9 is moved on the garter 7 to move the electrode 12 directly above the electrode 3 in use.

Then, by rewinding the wire rope 10, the electrode 12 is lowered to match the screw hole at the upper end of the electrode 3 with the nipple at the lower end of the electrode 12, and the cylinder 18 is actuated to project the claw 19 again. After the claw 19 is engaged with the vertical groove 20 of the guide cylinder 5, the torque actuator 28 rotates the plug 24 to screw the electrode 12 into the electrode 3 for joining. Then, the electrode gripping device 2 gripping the electrode 3 is replaced by the electrode 12, and then the torque actuator 28 is rotated in the reverse direction so that the plug 24 is disengaged from the screw hole of the electrode 12. This completes a series of electrode replenishment joint work. The universal joint 21 is provided so that the rotation axis of the plug 24 coincides with the screw holes of the electrodes 3, 12 and the like.

[0016]

As described above, in the replenishing electrode preparing device of the present invention, the electrode is vertically erected by tilting the holder, and the plug is screwed into the electrode simply by hanging the electrode connecting device in the guide cylinder. Since the electrodes can be vertically lifted, there is a beneficial effect such that the electrodes do not swing in the air and can be safely and easily joined by remote operation without requiring manpower.

[Brief description of drawings]

FIG. 1 is a front view of the entire apparatus according to the present invention.

FIG. 2 is an enlarged right side view of the main part of FIG.

FIG. 3 is a perspective view of a holder and a guide cylinder.

FIG. 4 is an operation state diagram of FIG.

FIG. 5 is a vertical sectional view of an electrode extension device.

6 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Melting Furnace 2 Electrode Grip Device 3 Electrode 4 Fixed Frame 9 Wire Winding Device 10 Wire Rope 11 Electrode Joint Device 12 Replenishing Electrode 18 Cylinder 19 Claw 24 Plug 28 Torque Actuator 30 Holder 31 Spindle Piece 32 Cylinder 34 Lock Bar 35 Support point 36 Lock piece 38 Guide tube 40 Vertical groove

Claims (1)

[Claims] 1. A holder capable of vertically arranging a plurality of electrodes in a laterally aligned state is provided so as to be vertically erected and tiltable, and a lock piece for preventing rotation of each electrode is provided on the holder.
A guide cylinder for preventing rotation is fixedly provided so as to be positioned immediately above each electrode when the holder is in a vertical standing state, and an electrode connecting device is hung in the guide cylinder so that a plug can be screwed into the electrode. A replenishing electrode preparation device for a melting furnace, characterized in that