JP3307010B2 - Electrode heating electrode support device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting an electrode for electric heating, and more particularly, to a device for supporting an electrode for arc heating or resistance heating, the device having an electrode grip changing mechanism. About.

[0002]

2. Description of the Related Art Generally, in an arc furnace for melting and refining metal materials and melting waste such as municipal incineration ash, electrodes are gripped by an electrode gripper attached to an electrode support arm which can be raised and lowered. An electric current is passed through the gripper to generate an arc between the object and the base metal.

However, since the above-mentioned electrodes are consumed by use, the electrodes are sequentially lowered and the operation is performed. When the electrodes reach the lower end position in order to prevent interference between the electrode supports or the electrode gripper and the furnace lid, It is necessary to replace the electrode with an electrode gripper. Conventionally, the conventional gripping method is to temporarily suspend the electrode with an overhead crane, release the electrode gripper, and grab it to the upper position, which requires complicated and dangerous work in a high temperature environment near the electrode. It is not desirable.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and does not require any manual work in the vicinity of the electrodes. It is something to offer.

[0005]

According to the present invention, there is provided a support device for an electrode for electric heating according to the present invention, a guide rail attached to a column and extending in a vertical direction, and a main grip which is guided by the guide rail so as to be vertically movable and grips the electrode. A lifting device for raising and lowering the main gripper, an auxiliary gripper guided upward and downward by the guide rails to grip the electrode above the main gripper, and an upper and lower intermediate portion of the support post. And a stopper for limiting a downward moving amount of the sub-grasping device.

[0006]

In the device for supporting an electrode for electric heating according to the present invention, the electrode is gripped by a main gripper driven up and down by a lifting drive, and is supplied with electricity through the main gripper to perform electric heating. At the time of changing the electrode, the electrode is gripped by the auxiliary gripper supported by the stopper, the main gripper is released and raised to a position near the auxiliary gripper, and the electrode is gripped by the main gripper. After that, if the secondary gripper is released, the electrode is gripped only by the main gripper and the gripping is completed,
Electric heating can be performed in a new grip state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 denotes a slag passage following a furnace main body (not shown) of a waste melting processing furnace, and a molten slag mainly composed of an inorganic substance produced by melting waste by another arc heating device in the furnace main body. 2 is a passage for discharging 2 through the slag port 3 to the outside of the furnace. Reference numeral 4 denotes a base metal such as iron stored in the bottom of the furnace body and extending into the slag passage 1. Reference numeral 5 denotes an arc heating device for performing single-phase AC arc heating in order to prevent the solidification of the molten slag 2 and has two electrodes 6a and 6b.

Reference numerals 10a and 10b denote electrode supporting devices for the electrodes 6a and 6b, respectively. Both devices have the same structure except that some of the components or mounting positions are symmetrical in FIG. The electrode support device 10a will be described, and the corresponding components of the electrode support device 10b will be denoted by the letter b instead of the letter a, and detailed description thereof will be omitted.

Reference numeral 11a denotes a support, which is fixed on a foundation via a base frame (not shown), and reference numeral 12a denotes a vertically extending guide rail fixed to the support 11a. 13a is a main gripper that grips the electrode 6a, and has a clamp shoe 15a driven by an air cylinder 14a.
It is connected to a single-phase AC power supply by a cable (not shown). 16a is a bracket 17a on the side of the main gripper 13a.
This guide show 1
6a is guided so as to be able to move up and down along the guide rail 12a.

Reference numeral 20a denotes a lifting drive which drives the main gripper 13a up and down. A wire rope 23 is connected to an output shaft of a motor 22a mounted on a support 21a fixed to the top of the support 11a.
a wire rope 23
The lower end of a is a bracket 17a integral with the main gripper 13a.
It is connected to the. Reference numeral 25a denotes a flexible sealing device for connecting the electrode through hole 8 provided in the ceiling 7 of the slag passage 1 to the lower part of the main gripper 13a.

Reference numeral 31a denotes an auxiliary gripper, which is a main gripper 13a.
The bracket 3 is attached to the auxiliary gripper 31a.
The guide shoe 33a attached via the 2a is guided so as to be able to move up and down along the guide rail 12a.
Reference numeral 41a denotes a stopper fixed to the upper and lower intermediate portions of the column 11a. The lower edge of the substrate 34a of the sub-grasper 31a is engaged with the stopper 41a, and the sub-grasper 31a is connected to the stopper 41a.
The movement below a is limited, and the movement is possible only above.

The sub-grasping device 31a includes a substrate 34a and an electrode 6a.
The roller 35a, 36a opposed to the roller 36a is supported at an angle, and the piston rod of an air cylinder 37a attached to the substrate 34a is mounted on the clamp rod 3 facing the roller 36a.
8a. When the piston rod projects, the electrode 6a is connected to the clamp shoe 38a and the roller 36a.
When the piston rod is retracted, the grip is released.

In the arc heating device 5 having the above configuration,
Electrode 6 driven up and down by lifting drives 20a and 20b
a, 6b and arc discharge between base metal 4
The temperature of the molten slag 2 is increased to promote melting of the slag and prevent solidification.

When the electrode 6a is worn out by use in the electrode supporting device 10a and the main gripper 13a reaches the lower end position shown by the solid line in FIGS. 1 and 2, an electrode connecting device (not shown) may be used as necessary. After the extension of 6a, the electrode 6a is gripped by the auxiliary gripper 31a, and then the gripping of the electrode 6a by the main gripper 13a is released.
The own weight of the electrode 6a is controlled by the stopper 41 via the sub-gripping device 31a.
Since the main gripper 13a is driven upward by the lifting drive 20a, the main gripper 13a is raised to a rising end position indicated by a chain line 45 a small distance below the auxiliary gripper 31a.

At this position, the main gripper 13a operates the electrode 6a.
When the gripping by the sub-grasping device 31a is released after the gripping, the electrode 6a is gripped at the upper position by the gripping distance H and one gripping is completed, so that the arc discharge is restarted in a new gripping state. it can.

When it is desired to pull up or retreat the electrode 6a from the inside of the slag passage 1, the main gripper 13a in the gripping state is raised to the uppermost position indicated by a chain line 46 in FIG. The sub-grasping device 31a is driven to rise while mounted on the main gripping device 13a, and does not hinder the raising of the main gripping device 13a and the electrode 6a. When the electrode 6a is lowered again, the sub-grasping device 31a is moved down to the main gripping device 13
It is transferred from above a to the stopper 41a, and is ready for the next grasp change.

The replacement of the electrode 6b in the electrode support device 10b is performed in the same manner as the above-described electrode support device 10a.

As described above, the gripping of the electrode 6 (general name of the electrodes 6a and 6b; hereinafter, the same applies to other parts) is performed by gripping and releasing operations of the main gripper 13 and the sub gripper 31 and raising and lowering drive. The lifting operation of the main gripper 13 by the machine 20 enables quick and easy remote control, and a large gripping distance H can be obtained by a single gripping change.

Further, since the auxiliary gripper 31 is supported on the stopper 41 above the main gripper 13, the auxiliary gripper 31 is located at a position separated from the lower part of the electrode 6 and the ceiling 7 where the temperature becomes high, and is exposed to the high temperature. Because of this, there is an advantage that durability is excellent and manufacture is easy.

The present invention is not limited to the above embodiment. For example, the main gripper 13, the auxiliary gripper 31, the lifting drive 20, the stopper 41, and the like may be of another type. In the above embodiment, the guide rails 12 and the electrodes 6 are oriented in the vertical direction. However, when the guide rails 12 and the electrodes 6 are arranged to be inclined at a predetermined small angle (for example, about 20 degrees) with respect to the vertical direction. The present invention is also applicable, and the inclination direction is also included in the vertical direction according to the present invention.

The support 11 does not need to be provided for each electrode, and a single support may be used for two or three (three-phase) electrodes.

Further, in addition to the single-phase arc heating apparatus for heating slag as in the above embodiment, the present invention provides a three-phase arc furnace for melting metals and wastes, and an arc furnace. It is widely applied to resistance furnaces (also referred to as arc resistance furnaces or buried arc furnaces) such as electric refining furnaces that have similar electrodes and mainly heat and melt by the resistance heating of the material to be heated. .

[0023]

As described above, according to the present invention,
The gripping and releasing operation of the main gripper and the auxiliary gripper arranged above and the lifting / lowering operation of the main gripper can quickly and easily change the electrode, and the work near the electrode can be performed. Since it becomes unnecessary and remote operation becomes possible, it greatly contributes to labor saving and shortening of the gripping time.

[Brief description of the drawings]

FIG. 1 is a side view of an electrode supporting device according to an embodiment of the present invention.

FIG. 2 is a front view of the electrode support device of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

[Explanation of symbols]

5 arc heater, 6a electrode, 6b electrode, 10a
... electrode support device, 10b ... electrode support device, 11a ... support, 11b ... support, 12a ... guide rail, 12b ... guide rail, 13a ... main gripper, 13b ... main gripper, 1
5a: Clamp show, 15b: Clamp show, 16
a ... guide show, 16b ... guide show, 20a ... elevation drive, 20b ... elevation drive, 22a ... motor, 22
b ... motor, 23a ... wire rope, 23b ... wire rope, 24a ... winding cylinder, 24b ... winding cylinder, 31a ... sub-gripping device, 31b ... sub-gripping device, 33a ... guide shoe, 33b
... Guide guide 37a Air cylinder 37b Air cylinder 38a Clamp show 38b Clamp show 41a Stopper 41b Stopper

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05B 7/10 F27B 3/08 F27D 11/08 B65G 47/90

Claims (1)

(57) [Claims] A guide rail attached to a support and extending in a vertical direction; a main gripper guided by the guide rail so as to be movable up and down to grip an electrode; a lifting drive for driving the main gripper up and down; A sub-gripping device which is guided by the guide rail so as to be able to move up and down to grasp the electrode, and a stopper which is disposed at an upper and lower middle portion of the support column and limits a downward movement amount of the sub-gripping device. A device for supporting an electrode for electric heating, comprising: