JP3097291B2 - Electrode connection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode connecting device for adding a new electrode to an electrode vertically mounted on an electric furnace.

[0002]

2. Description of the Related Art In an arc furnace in which an arc is generated between an electrode inserted into a furnace and a raw material to melt the raw material, the electrode is consumed while the operation is continued. Therefore, in such an arc furnace, in such an arc furnace, the electrode is made to enter into the inside of the electrode hole of the furnace lid, the electrode is held by a holding body, and a new electrode is provided for the electrode. And so on.

[0003] The electrodes of this arc furnace are mounted vertically, and when a new electrode is added to this electrode,
The extension electrode is suspended vertically, and the lower end thereof is connected to the electrode of the arc furnace by means such as a screw.

By the way, as shown in FIG. 5, a new electrode 100 for extension is usually packed in a state of lying down sideways, while a conventional connection device 102 for such an electrode is used.
Can only be set with the electrodes upright,
Therefore, when setting the electrode 100 in the connection device 102, the electrode 100 in the state of lying horizontally must be once raised and set to the vertical position.

[0005] For this reason, there has been a problem that it takes a lot of time to set the electrodes, and that the setting of the electrodes requires heavy labor.

[0006]

SUMMARY OF THE INVENTION The device of the present invention has been devised in order to solve such a problem. The gist of the device is to hold a new electrode to be replenished vertically,
An electrode connection device for connecting to an electrode vertically mounted on the electric furnace while rotating this around an axis,
(A) a drive source such as a motor for rotating the additional electrode, and (b) a vertically arranged upper end connected to the drive source, and a rotary drive force from the drive source. (D) the connecting shaft such as a screw member provided at the lower end of the conductive shaft for connecting the conductive shaft to the extending electrode; Rotating means for allowing a lower end portion of the transmission shaft including means to be rotatable from a vertical posture to a horizontal or substantially horizontal posture or vice versa.

[0007]

In the apparatus according to the present invention, the lower end portion of the transmission shaft including the connecting means is rotatable from a vertical posture to a horizontal or substantially horizontal posture by the rotation means.

Therefore, even if the electrode is lying down sideways, it can be connected to the conduction shaft by the connecting means without any trouble.

When the conductive shaft is lifted by the lifting device in this state, the electrode lying in the horizontal position is automatically raised to be in the vertical position.

Then, the electrode held vertically is brought over the electrode of the electric furnace, and the driving force from the driving source is transmitted to the electrode via the conduction shaft to rotate the electrode. Can be connected to the electrode connected to the.

As described above, according to the present invention, a new electrode to be replenished can be easily set in the connecting device while lying sideways, thereby greatly reducing the work of setting the electrode in the connecting device. In addition, the operation for raising the electrodes in the vertical direction is not required, so that the burden on the operator can be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 schematically shows an electric furnace (arc furnace) and an apparatus for adding a new electrode to an electrode mounted on the electric furnace.

In this figure, reference numeral 10 denotes an electric furnace, 12a, 1
2b is an electrode made of artificial graphite, 14 is a connecting device for adding the electrodes, and 16 is a crane for suspending and transporting the electrode 12b together with the connecting device 14.

The electrode 12a mounted on the electric furnace 10 is held in a holding hole 20 at the tip of a holding arm 18 as shown in FIG.

The electrode 12a has a female screw hole 22 at its upper end.
Are formed, and the nipple 24 previously mounted on the electrode 12b to be newly added is screwed into the female screw hole 22, thereby connecting the electrodes 12a and 12b.

The nipple 24 is made of graphite of the same material as the electrodes 12a and 12b, has an external thread formed on the outer peripheral surface, and has a half in the axial direction in the female screw hole 26 of one electrode 12b and the other half in the other. Female screw hole 22 of electrode 12a
Is to be screwed into.

The electrode connecting device 14 has an outer cylinder 28, an intermediate cylinder 30, and an inner cylinder 32, as shown in detail in FIG. The wire 36 is raised and lowered by winding and lowering of the wire 36 by 34.

That is, the winding up and down of the wire 36 causes the outer tube 28 and the intermediate tube 30 to be housed in the state shown in FIG. 3B and protruded in the state shown in FIG.

The connection device 14 has a motor 38 with a speed reducer for rotating and driving the electrode 12b, and a transmission shaft 40 for transmitting the driving force.

A nipple fitting 42 as a pseudo nipple is attached to the lower end of the conduction shaft 40. The conduction shaft 40 is connected to the electrode 12b by screwing the nipple fitting 42 into the female screw hole 22 in the electrode 12b. 12b is suspended via the transmission shaft 40.

On the other hand, a screw shaft 44 is provided at the upper end of the transmission shaft 40, and the screw shaft 44 is screwed to a female screw member 46 disposed at a fixed position.

At the upper end of the screw shaft 44, a large-diameter head 47 having a square cross section is formed. The head 47 is opposed to a cylindrical body 48 having a square cross section that rotates integrally with the motor 38 with a speed reducer. It is fitted so as to be non-rotatable and relatively movable in the axial direction.

An engaging projection 50 is provided at the lower end of the outer cylinder 28 of the connecting device 14 in a downward direction. And into the engagement groove 52 for engagement.

The engaging projection 50 and the engaging groove 52 are formed between the electrode 12a gripped by the gripping arm 18 and the connecting device 1.
4 for aligning the electrode 12b suspended in the center.

The transmission shaft 40 comprises an upper part 60, a lower part 62 and a joint 64 connecting them, as shown in FIG.
As shown in FIG. 1, it is further divided into an upper first portion 66 and a lower second portion 68.

The nipple fitting 42 is provided at the lower end of the second portion 68, and the handle 70 is provided at the upper end.

The first portion 66 and the second portion 68 are
The clutch members 72 and 74 are connected to each other via a rotation shaft 76 provided on the clutch member 72.

As shown in FIG. 4, the clutch member 72 is of a block shape and has a fitting hole 78 at the center thereof.
The second portion 68 is fitted in the fitting hole 78.

At the upper end of the fitting hole 78, a recess 80 having a larger diameter is formed, in which the flange 82 of the second portion 68 is accommodated. The flange 82, that is, the second portion 68, is supported by the stepped surface 84 in the vertical direction.

The second portion 68 is provided with a rotation transmitting portion 86 having a rectangular cross section, in which the other clutch member 7 is formed.
4 are fitted in the center fitting hole 88 so as to be relatively non-rotatable and relatively movable in the axial direction.

The clutch member 74 is provided with a pair of claws 90 facing downward, while the clutch member 72 is provided with a pair of claws 92 facing upward.
Is moved in the axial direction along the rotation transmitting portion 86,
The claws 90 and 92 are engaged with each other or the engagement is released.

The rotation shaft 76 provided on the clutch member 72 is oriented horizontally as shown in FIG. 1B, so that the entire second portion 68 can rotate about a horizontal axis. Has become.

Next, the operation of the present apparatus will be described. Electric furnace 10
The electrode 12b to be added to the electrode 12a of FIG.
As shown in the figure, the user is put on standby in a state of lying sideways.

The operation of setting the electrode 12b in this state on the connection device 14 is performed as follows. First, the connecting device 14 is horizontally moved by the crane 16 to the standby position of the electrode 12b, and then lowered.

When the connecting device 14 has been lowered to an appropriate height, the electrode 12b is set on the connecting device 14 according to the procedure shown in FIGS.

More specifically, the clutch member 74 of the transmission shaft 40 is slid toward the handle 70 along the rotation transmitting portion 86 of the second portion 68 to release the engagement with the other clutch member 72 (FIG. 4 (A) state).

Then, the entire second portion 68 is turned around the turning shaft 76 to be in a horizontal posture, and then the entire second portion 68 is turned by holding the handle 70, and the nipple fitting 42 at one end thereof is moved. It is screwed into the female screw hole 22 of the electrode 12b.

When the nipple fitting 42 is sufficiently screwed into the female screw hole 22, the clutch member 74 is returned to the original position, and is engaged with the other clutch member 72 again.

At this point, the setting of the electrode 12b on the connecting device 14 is completed, and when the connecting device 14 is lifted by the crane 16, the second portion 68 rotates around the rotation shaft 76 and at the same time the electrode 12b is in the lying position. Then, the user is further raised upward while being held by the connection device 14.

Subsequently, the crane 16 is moved horizontally along the trajectory indicated by the arrow in FIG. 2 to transfer the held electrode 12b onto the electrode 12a of the electric furnace 10, and lowers the motor 12 while lowering the electrode 12b. Activated and held electrode 1
2b is rotated.

Then, the nipple 24 at the lower end is screwed into the female screw hole 22 of the electrode 12a of the electric furnace 10, and the pair of electrodes 1
2a and 12b are connected to each other.

The claws 90 and 92 of the clutch members 72 and 74
It is desirable to engage with a certain play in the rotation direction.

Although the embodiment of the present invention has been described in detail above, this is merely an example, and the present invention can be configured in various modified forms based on the knowledge of those skilled in the art without departing from the gist of the present invention. is there.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of an electrode connection device according to an embodiment of the present invention.

FIG. 2 is a schematic view of an electric furnace and an electrode connecting device.

FIG. 3 is a detailed view of the same electrode connection device.

FIG. 4 is a diagram showing in more detail a main part of the electrode connection device shown in FIG. 1;

FIG. 5 is an explanatory diagram for explaining the background of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Electric furnace 12a, 12b Electrode 14 Electrode connection device 38 Motor with reduction gear 40 Electric shaft 42 Nipple fitting 70 Handle 72, 74 Clutch member 76 Rotating shaft 90, 92 Claw

────────────────────────────────────────────────── (5) References JP-A-3-285288 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 7/14 F27D 11/10

Claims (1)

(57) [Claims] 1. An electrode connecting device for holding a new electrode to be replenished in a vertical direction, and rotating the new electrode around an axis to connect the electrode to a vertically mounted electrode in an electric furnace. (B) a drive source such as a motor for rotating and driving the extension electrode; and (b) a vertically arranged upper end connected to the drive source, and a rotational drive force from the drive source being added to the drive source. (C) connecting means such as a screw member provided at the lower end of the conductive shaft and connecting the conductive shaft and the extension electrode; and (d) the connecting means. Rotating means for rotating a lower end portion of the conduction shaft from a vertical posture to a horizontal or substantially horizontal posture or vice versa.