JP2908101B2 - Package of artificial graphite electrode - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial graphite electrode package used as an electrode for an electric furnace and the like.
A person who ships and transports artificial graphite electrodes with nipple fitting socket holes at both ends from the electrode manufacturing plant to the point of use
The present invention relates to a package of graphite electrodes .

[0002]

2. Description of the Related Art Artificial graphite electrodes provided with socket holes for nipple (joint) fitting at both ends are generally used as energizing electrodes in steelmaking and other various electric furnaces for refining. A plurality of such artificial graphite electrodes are usually used in series connected via a nipple, and new electrodes are successively added as the electrodes are consumed.

[0003] As a method of adding an artificial graphite electrode, a nipple is attached to one of the socket holes of a new electrode, and a hanger is attached to the other, and the electrode is hung up through the hanger and the socket at the upper end of the electrode in use is used. It is common to fit a nipple of a new electrode into the hole and then remove the hanger. As another method, the electrode lifted in the same manner as described above is temporarily set on an automatic connection machine that grips and transports the electrode, and the nipple of a new electrode is used by the automatic connection machine at the upper end of the electrode being used. There is also a method of fitting into the socket hole.

[0004] However, in any of the above cases, conventionally, the attachment of the hanging tool to the artificial graphite electrode is performed at the point of use (in front of the furnace) because it is generally difficult to transport the apparatus with the hanging tool attached. Was performed in

[0005]

Therefore, in the prior art, foreign matter or the like adhering to the socket hole before the mounting of the hanging tool may cause damage to the socket hole, and may cause the electrode to fall off or break due to poor connection between the electrodes. there were. Once such an accident occurs, the operation must be stopped for a long time in order to remove the electrode dropped into the furnace, etc., and the operation efficiency is significantly reduced.

Although artificial graphite electrodes vary in weight depending on their size, they are usually very heavy, about 500 to 2,000 kg. Therefore, in consideration of work efficiency at the site of use, it is necessary to mount a hanging device with the electrodes placed sideways. was there. Such a work conventionally performed not only places an excessive burden on a site worker, but also has a limit in reducing the inferior mounting of the hanging tool in the work under such a situation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and prevents an electrode from falling off or a breakage accident during operation by preventing breakage of a socket hole and improper mounting of a hanger. It is another object of the present invention to enable labor saving at an electrode use site.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to achieve the above object, and as a result, a nipple, a hanging tool and a protector for protecting an electrode have been attached to an artificial graphite electrode at a manufacturing plant, and the product has been transported. The inventors have found that the above-mentioned problems can be solved, and have reached the present invention.

That is, the present invention relates to a package of artificial graphite electrodes to be transported from a manufacturing plant for artificial graphite electrodes to a site of use, wherein one of the socket holes of the artificial graphite electrode having nipple fitting socket holes at both ends. A package of artificial graphite electrodes, characterized in that a nipple and a hanging member are screwed into the other from the end face, respectively, and are covered and packaged with protective protectors that cover each of the both ends .

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an example of a state when an artificial graphite electrode is shipped and transported according to the present invention, and FIG. 2 is a longitudinal sectional view showing an example of a hanging device according to the present invention.

The artificial graphite electrode according to the present invention has a nipple fitting socket hole at both ends, which has been conventionally used as an energizing electrode or the like of an electric furnace for steelmaking.
As shown in FIG. 1, such a socket hole is usually provided as a tapered concave portion 2 at the center of both end surfaces of the electrode 1, and a screw (not shown) is engraved on the side surface of the concave portion.

The nipple (joint) according to the present invention may be one conventionally used. Like the nipple 3 shown in FIG. 1, the nipple 3 has front and rear convex portions that can be fitted (screwed) into the socket hole 2. By fitting both convex portions into the socket holes 2 of the two electrodes, Generally, both electrodes 1 are connected.

The lifting device according to the present invention is not particularly limited, but as shown in FIGS. 1 and 2, a member (a lifting device main body) 4a that can be fitted (screwed) into the socket hole 2 and a lifting bolt 4b. Is preferred. The hanging tool 4 shown in FIG. 2 is particularly preferable because the bolt 4b is slidably inserted into the main body 4a and becomes compact during transportation.

Metal, artificial graphite, resin or graphite impregnated with metal is suitably used as the material of the hanging tool. However, if at least the main body 4a is made of artificial graphite, the weight of the hanging tool 4 can be reduced to facilitate transport. Is preferable.

The protective protector used in the present invention only needs to be able to protect at least both ends of the electrode when the electrode is transported, and cardboard, foamed plastic and the like are generally employed. Although the shape of the protector is not particularly limited, as shown in FIG. 1, a cap-type protector 5 is preferable because it can be easily attached and detached.

In the present invention, it is necessary to mount the hanging tool, the nipple, and the protective protector on the artificial graphite electrode in a manufacturing factory of the electrode, preferably immediately after processing. By attaching a hanging tool to the electrodes before shipment and transportation in this way, damage to the socket hole due to foreign matter and damage to the electrode end face during transportation can be completely prevented, and the electrodes fall off or break due to poor connection between the electrodes. Accidents are significantly reduced.

The specific method of attaching a hanging tool or the like to the electrode is not particularly limited, but it is preferable to attach the hanging tool and the nipple while the electrode is in a vertical position. In this case, since the force is evenly applied to the hanging tool or the like at the time of fitting, the mounting failure is further reduced.

Next, in the present invention, the artificial graphite electrode is shipped and transported from the manufacturing factory to the site of use by ordinary transportation means with the hanging members and the like attached as described above. Then, the electrode transported according to the present invention, after removing the protective protector at the site of use, is appropriately connected to the electrode in use by using the already mounted hanging tool and nipple, and is used as a current-carrying electrode. .

According to the present invention, the work at the site of use is only the work of removing the protective protector and the work of connecting the electrodes, which is greatly reduced as compared with the related art. Therefore, according to the present invention, it is possible to save labor at the site where the electrode is used.

[0021]

The present invention will now be described more specifically based on examples and comparative examples.

Embodiment 1 As shown in FIG. 1, a 28-inch φ × 9-foot long having a tapered socket hole 2 provided with a screw on a side surface at both ends.
(714 mmφ × 2845 mmL) artificial graphite electrode 1 was manufactured. Thereafter, at the manufacturing plant, a tapered nipple 3 is screwed into one of the socket holes 2 and a hanging member 4 made of artificial graphite whose main body 4a is screwed into the other, and both ends of the electrode 1 are made of corrugated cardboard for protection. It was covered with the protector 5 to obtain the state shown in FIG.

Next, the artificial graphite electrode 1 was shipped and transported by truck from the manufacturing factory to the use site in the state shown in FIG. Then, after removing the protector 5 in front of the furnace, the electrode 1 is hoisted by a crane via the hanger 4,
The exposed side of the nipple 3 was screwed and connected to a socket hole at the upper end of the electrode in use on the furnace, and used as a current-carrying electrode of a 50-ton DC arc furnace. The hanging tool 4 was removed after the electrode 1 was connected.

When 50 artificial graphite electrodes were continuously used in a continuous operation in the same manner as described above, no electrode-related accidents such as dropping of the electrodes occurred.

Comparative Example 1 An artificial graphite electrode 1 similar to that of Example 1 was obtained by a conventional method.
That is, in a state where only the tapered nipple 3 was attached to one of the socket holes 2 at the manufacturing factory, the product was transported by truck from the manufacturing factory to the use site.

Next, after the same hanging member 4 as in the first embodiment is screwed into the other of the socket holes 2 in front of the furnace, the electrode 1 is connected to the electrode in use in the same manner as in the first embodiment. Used as

When 50 artificial graphite electrodes were continuously used in a continuous operation in the same manner as described above, four accidents related to the electrodes, such as electrode dropping, occurred, and three of them occurred during use. Was clearly confirmed.

[0028]

As described above, if the artificial graphite electrode is transported in the package of the present invention, damage to the socket hole and improper mounting of the hanger can be prevented. The number of electrodes falling off or breakage due to poor connection is significantly reduced.

Further, when the package of the artificial graphite electrode of the present invention is employed, the work on site where such an electrode is used is remarkably reduced, and labor can be saved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of a state when an artificial graphite electrode is shipped and transported according to the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a hanging tool according to the present invention.

[Explanation of symbols]

1: artificial graphite electrode, 2: socket hole, 3: nipple,
4: hanging device, 4a: hanging device main body, 4b: lifting bolt, 5: protective protector.

Continued on the front page (56) References Japanese Utility Model Showa Sho 62-168385 (JP, U) Japanese Utility Model Showa 50-136690 (JP, U) Japanese Utility Model Showa 62-168385 (JP, U) Japanese Utility Model Showa 64-51296 (JP, U.S.A.) , U) Jikken 38-28900 (JP, Y1) (58) Fields investigated (Int. Cl. ⁶ , DB name) H05B 7/12 B65D 85/20 H05B 7/14

Claims (2)

(57) [Claims] 1. A package of artificial graphite electrodes to be shipped and transported from an artificial graphite electrode manufacturing plant to a use site, wherein a nipple is provided in one of the socket holes of the artificial graphite electrode having nipple fitting socket holes at both ends, and At the other end, hanging members are screwed in from the end faces, respectively, and
A package of artificial graphite electrodes, which is packaged with a protective protector covering various forms . 2. The hanging tool is characterized in that it has a structure in which a hanging tool can be fitted into a socket and the entire length is shorter than the depth of the socket hole, and a slidable lifting bolt housed in the hanging tool main body. A package of the artificial graphite electrode according to claim 1.