JPH0718200U - Electrode support device for arc furnace for steelmaking - Google Patents

Abstract

(57) [Abstract] [Purpose] The electrode swivel device can be simplified and the electrode support arm can be swung even when the steelmaking arc furnace is tilted, and electrode length measurement and gripping position adjustment are possible. It can be so. A tilting floor 3 on which a furnace body 4 is placed and tilts obliquely, a lifting mast 6 supported by the tilting floor 3 so as to be able to move up and down, a turning mechanism 12 provided at an upper end of the lifting mast 6, and a turning mechanism 1
An electrode support arm 1 mounted in a direction orthogonal to the lifting mast 6 via 2 to support an electrode 19 of the steelmaking arc furnace 4.
7 is provided so that when the electrode 19 is pivoted, only the electrode support arm 17 is pivoted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electrode supporting device for an arc furnace for steelmaking.

[0002]

[Prior art]

 An example of an electrode supporting device for an arc furnace for steelmaking that has been conventionally used will be described with reference to the side view of FIG. 6. A tilting floor c that is tilted obliquely by a tilting device b that expands and contracts on a foundation surface a. Is provided, and the furnace body d is placed on the tilting floor c so that the furnace body d can be tilted together with the tilting floor c when tapping.

A swing bed e is pivotally mounted on a swing center axis f in the vertical direction on the tilt floor c, and the swing bed e rotates about the swing center axis f by the rotation of a turning wheel g. It is designed to swivel on.

An elevating mast i for elevating by the operation of the elevating device h is provided on the swivel floor e, and an electrode support arm j is fixed to the upper end of the elevating mast i in a direction orthogonal to the elevating mast i. There is. The tip of the electrode support arm j is designed to hold the electrode k.

An electrode pedestal 1 is provided on the base surface a on the side of the furnace body d. The electrode pedestal 1 has a built-in limit switch for stopping the descending of the ascending / descending mast i. The swivel floor e is swiveled on the tilting floor c around the swivel center axis f, and the electrode k of the furnace body d is rotated. After moving from just above the center to just above the electrode pedestal 1, when the lifting mast i is lowered and the lower end of the electrode k comes into contact with the electrode pedestal 1, the limit switch built in the electrode pedestal 1 is activated. Then, the lowering of the lifting mast i is stopped. At this time, it is possible to determine the remaining length of the electrode k and the necessity of changing the gripping position of the electrode supporting arm j with respect to the electrode k, based on the descending distance of the lifting mast i from the predetermined maximum height until it stops. There is.

[0006]

[Problems to be solved by the device]

 In the conventional device shown in FIG. 6, when the electrode k is swung, it must be swung together with the swirling floor e, so that the swivel device becomes large-scaled, and when the furnace body d is tilted, the swirling device is swung. Was impossible.

The present invention eliminates such conventional drawbacks, simplifies the electrode swivel device, and makes it possible to swivel the electrode support arm easily even when the furnace body is tilted. It is an object of the present invention to provide an electrode supporting device for an arc furnace for steelmaking, which is capable of measuring the electrode length even when the body is tilted.

[0008]

[Means for Solving the Problems]

 According to the present invention, a tilting bed on which a furnace body is placed and tilted obliquely, an elevating mast supported by the tilting floor so as to be able to ascend and descend, a swivel mechanism provided at an upper end of the elevating mast, and the swivel mechanism are provided. And an electrode support arm for supporting an electrode mounted in a direction orthogonal to the elevating mast, and an electrode support device for a steelmaking arc furnace, and a lower end of the electrode abutting on a tilting floor. The present invention relates to an electrode supporting device for an arc furnace for steelmaking, which is provided with an electrode pedestal for stopping the lowering of the lifting mast.

[0009]

[Action]

 When the electrode is swiveled, only the electrode support arm needs to be swung by the swivel mechanism, so the electrode support arm can be swung even when the furnace body is tilted and the steel is being tapped. You will be able to perform work such as adjusting the height.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 3 is a plan view of the entire arc furnace for steelmaking equipped with the device of the present invention, and FIG. 4 is a front view of FIG. 3, in which the base surface 1 expands and contracts as shown in FIG. The tilting device 2 is provided with a tilting bed 3 which is tilted obliquely, and a furnace body 4 is placed on the tilting bed 3, and the tilting bed 3 and the furnace body 4 are tilted when tapping steel. You can do it. Further, the tilting floor 3 is provided with a lifting mast 6 which is lifted and lowered by an electrode lifting device 5.

FIG. 1 is a side view of an embodiment of the invention of claim 1, and FIG. 2 is a front view of FIG. 1 seen from the left side. The electrode elevating device 5 is attached to a lower end of an elevating mast 6. It is equipped with a sheave 7, a wire rope 8, and a lifting drive device 9. One end of the wire rope 8 is fixed to the tilting floor 3 and goes through the lower side of the sheave 7 to The end is wound on a winding drum 10 which is rotated by a lifting drive 9. Then, when the winding drum 10 is rotated by the lifting drive device 9 and the wire rope 8 is wound or unwound, the lifting mast 6 is guided by the guide roller 11 to move up and down.

As shown in FIGS. 1 to 4, a swivel mechanism 12 is provided at the upper end of the lifting mast 6. As shown in FIGS. 1 and 2, the swivel mechanism 12 has a gear 13 formed around a bearing mounted on the upper end of the lifting mast 6, and a pinion 16 which is rotated by a swivel drive device 15 mounted on a base plate 14 as described above. The gear 13 is engaged with the gear 13 so that the base plate 14 can be horizontally rotated.

A base end side of a horizontal electrode support arm 17 is fixed to a base plate 14 of the swivel mechanism 12, and an electrode holder 18 is attached to the tip of the electrode support arm 17 to hold an electrode 19. It is supposed to do.

When the electrode 19 is swung in the above-described apparatus shown in FIGS. 1 to 4, if the lifting mast 6 is lifted by the electrode lifting device 5, the lifting mechanism 12 and the electrode support arm 17 are lifted together with the lifting mast 6. The electrode 19 is pulled out upward from the furnace body 4.

Next, when the swivel mechanism 12 is actuated to swivel the electrode support arm 17, the electrode 19 held by the electrode holder 18 at the tip of the electrode support arm 17 is moved to the lateral side separated from the upper side of the furnace body 4. Turn. In this case, the lifting mast 6 is in a fixed state, and the electrode support arm 17 is only swung by the swivel mechanism 12 at the upper end of the lifting mast 6, and it is not necessary to provide a large-scale device such as the conventional swivel floor e. become. Further, the electrode support arm 17 can be easily swiveled when the furnace body 4 is tilted and the steel is tapped.

Next, an embodiment of the invention of claim 2 will be described.

According to the second aspect of the invention, in addition to the above-described configuration, the electrode pedestal 20 is further provided on the tilting floor 3 as shown in FIGS. 3 and 4.

The electrode pedestal 20 is provided below the electrode 19 when the electrode 19 is swung to the side of the furnace body 4, and is supported by a spring 22 above the casing 21 as shown in the sectional view of FIG. There is an electrode receiving tray 23, and a striker 24 is attached below the center of the electrode receiving tray 23. The roller 26 of the limit switch 25 mounted inside the casing 21 faces directly below the striker 24. When the roller 26 of the limit switch 25 is pushed by the striker 24, the signal from the limit switch 25 stops the lowering of the lifting mast 6.

Next, the operation of the apparatus shown in FIGS. 3 to 5 will be described.

After raising and lowering the mast 6 to a predetermined maximum height, the swivel mechanism 12 is operated to swivel the electrode support arm 17 to move the electrode 19 right above the electrode pedestal 20, and then the vertical mast 6 is lowered. Then, the lower end of the electrode 19 reaches the position of the electrode receiving base 20 as shown by the chain double-dashed line in FIG. 4, abuts against the electrode receiving tray 23 of FIG. 5 and resists the force of the spring 22 and the electrode receiving tray 23 and the striker. 24 is pushed down and the roller 26 of the limit switch 25 is pushed to stop the lowering of the lifting mast 6. At this time, the remaining distance of the electrode 19 and the necessity of changing the gripping position of the electrode supporting arm 17 with respect to the electrode 19 can be determined from the descending distance of the elevating mast 6 from the predetermined maximum height until it stops.

Since the electrode pedestal 20 is mounted on the tilting floor 3, the above-described operation can be performed even when the tilting floor 3 is tilting, and the furnace body 4 is tilting during tapping. Even in this case, the length measurement and adjustment of the electrode 19 can be executed.

[0023]

[Effect of device]

 The invention of claim 1 has an advantage that the electrode swivel device is simplified and is inexpensive, and the electrode support arm can be swung easily even when the furnace body is tilted.

In addition to the above effects, the invention of claim 2 has an effect that the electrode length can be measured and adjusted when the furnace body is tilted and the steel is being tapped, and the operating time can be shortened.

[Brief description of drawings]

1 is a side view of an embodiment of the invention of claim 1; FIG.

FIG. 2 is a front view of FIG. 1 as viewed from the left.

FIG. 3 is a plan view of the entire arc furnace for steelmaking equipped with the device of the present invention.

FIG. 4 is a front view of FIG.

FIG. 5 is a vertical cross-sectional view of the electrode pedestal of claim 2.

FIG. 6 is a side view of a conventional electrode supporting device for a steelmaking arc furnace.

[Explanation of symbols]

 3 Tilting floor 4 Furnace body 6 Lifting mast 12 Turning mechanism 17 Electrode support arm 19 Electrode 20 Electrode pedestal

Claims (2)

[Scope of utility model registration request] 1. A tilting bed on which a furnace body is placed and tilts obliquely, an elevating mast supported by the tilting floor so as to be able to ascend and descend, a swivel mechanism provided at an upper end of the elevating mast, and the swivel mechanism. And an electrode supporting arm which is attached in a direction orthogonal to the elevating mast and supports an electrode, and an electrode supporting device for an arc furnace for steelmaking. 2. The electrode supporting device for an arc furnace for steelmaking according to claim 1, further comprising an electrode support for stopping the descending of the lifting mast by abutting the lower end of the electrode on the tilting floor.