JPS5819446A - Removing device for slag in rh furnace or the like - Google Patents

Abstract

PURPOSE:To strip stuck slag efficiently by providing a turntable under a furnace, erecting a single cutter piece thereon, and making said piece freely movable vertically, swivelable, and movable radially. CONSTITUTION:A turntable 3 is disposed under an RH furnace and a single cutter piece 6 of a required width is erected thereon. According to the vertical movement of an upper machine frame 2, the piece 6 moves upward and downward on the outside circumferential surface of a suction pipe A or discharge pipe B. Said piece is swiveled by the rotation of a small turntable 5 and is moved radially by means of an oil hydraulic cylinder 7 and a guide 8. Slag is stripped effectively by aligning the top end part of the piece 6 to the required position to be stripped on the outside circumferential surface of the pipe A or the pipe B and swiveling the piece.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slag removal device used in repair work for vacuum degassing RH furnaces and the like.

Since both the suction pipe and the discharge pipe in the RH furnace are immersed in the Is vortex, they are easily eroded and require frequent replacement, while slag or molten metal often sticks to their peripheral surfaces after degassing. Several proposals have been made to remove such slag and the like, one of which is a slag removal device described in Japanese Utility Model Publication No. 52-56322. In this device, adhering slag is removed by raising and lowering two half-force cutter pieces that combine to form a cylindrical cutter, and the half cutter pieces are also movable in the radial direction.

However, although the cutter piece in the same slag removal device is made up of two halves as mentioned above, it is essentially a cylindrical cutter, and when this cutter moves up and down, it removes the slag from the entire outer periphery of the suction pipe or discharge pipe. It has the disadvantage that it gets stuck in the refractory and cannot be removed. In addition, there is a problem in that parts that do not require peeling are peeled off at the same time, resulting in bromine bite or excessive cutting load.

In view of the above-mentioned problems, the present invention makes it possible to move the cutter piece with a single force of a required arc width up and down and turn it freely, and also to make it movable in the radial direction so that the cutter piece faces only the area where the slag is attached. It is an object of the present invention to provide a slag removal device that can efficiently remove slag and prevent the cutter pieces from being bitten and abnormal cutting loads.

In the present invention, a turntable is placed under the RH furnace, a cutter piece of a required width is set upright in the shape of the turntable, and the cutter piece can be raised and lowered along the outer circumferential surface of the suction pipe or discharge pipe. RH furnace, etc., characterized in that the cutter piece can be freely rotated around the suction pipe or the discharge pipe by the rotation of the turntable, and the cutter piece can be freely moved in the radial direction. This relates to a slag removal device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The slag removal device according to the present invention will be described in detail below with reference to an embodiment shown in the accompanying drawings (FIGS. 1 to 3).

In this embodiment, the slag removal device is shown as being built into an RH furnace repair truck. As shown in the figure, the upper machine frame (2
) is installed, and on the upper surface of this upper machine frame +21 is installed a large turntable (3) whose rotation center is the same as the center of the RH furnace and which has a rotational drive device.
) A slag removal device according to the present invention is placed at an eccentric position on the top. The device includes a small turntable +5 having a rotary drive device f (41) at the bottom, substantially in the above-mentioned eccentric position.
1, and place the outer peripheral surface of the suction pipe (A) or discharge pipe (B) of the RH furnace in an arc shape (
It is formed by erecting a cutter piece (6) having a knife edge formed at its upper end. In addition, this cutter piece (6) moves up and down the outer circumferential surface of the suction pipe (A) or the discharge pipe (B) as the upper machine frame (2) goes up and down, and
5) By rotating the suction pipe (A) or the discharge pipe (B)
It is configured to revolve around the

In this embodiment, the cutter piece (6) is raised and lowered by using the upper machine frame (
2), but the cutter piece (6)
It is also possible to have a configuration in which a fluid pressure cylinder or the like is provided at the lower part of the small turntable (5) as an elevating device.

Further, on the small turntable (5), there is a hydraulic cylinder (7) and a guide (8) whose tip end is connected to the center of the lower end of the cutter piece (6) and moves the cutter piece (6) in the radial direction. is located. In this embodiment, the half-unidirectional movement of the cutter piece (6) is performed using a hydraulic cylinder (7), but it is also possible to use a motor, pinion, or rank as another method. Regarding the other components of the RH furnace repair cart in this embodiment, (9) is an inner surface blowing pipe device, Ql is an outer surface suction pipe device, and (1) is a television camera device.

Next, the operation of the slag removal device having the above configuration will be described. First, the traveling truck (1) is driven to bring the slag removal device directly below the suction pipe (A) or discharge pipe (B) of the RH furnace. Next, the rotation drive device (4) is driven to rotate the small turntable (5) and the hydraulic cylinder +7).
is activated to move the cutter piece (6) in the radial direction along the guide (8), and move the upper end of the cutter piece (6) to the required position on the outer peripheral surface of the suction pipe (A) or the discharge pipe (B). Then, drive the lifting device to raise the lower arc upper cutter piece (6) integrally with the upper machine frame (2) to peel off the adhered slag. While lowering the power/vine piece (6), lower the small turntable (4).
) is rotated to similarly pivot the force/twirl piece (6) to the place where the slag is stuck, and the same action as described above is performed to reliably and efficiently remove the adhered slag on the entire outer periphery.

The present invention, which is constructed and operates as described above, has the following effects.

(l) Only the parts that require separation can be sequentially removed as the turntable rotates, and the adhered slag can be removed efficiently.

(2) The radial movement device cooperates with the turntable to prevent abnormal injection of cutter pieces and abnormal cutting load.
can do.

(3) If the upper machine frame is lifted together, the device will have sufficient cutting force.

[Brief explanation of drawings]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a plan view, and Fig. 3 is a front view of an embodiment of the present invention.
The figure is a longitudinal sectional view taken along arrow A--A in FIG. 2. (4): Rotary drive device (5): Turntable (6): Cutter piece (7): Hydraulic cylinder (8): Guide procedure amendment document 1. Incident indication 1981 Patent Application No. 116756 2, 61″” RH#44: Oh, 6 Yu 7'Dt
dtlf3, Relationship with the person making the amendment Patent applicant address Name (458) Nisshin Steel Co., Ltd. (and 1 other person) 4.
Agent address: Hakata Shin-Mitsui Building 6, 1-chome Hakata Ekimae, Hakata-ku, Fukuoka City, revised specification and drawings 7, Supplement 'E' Contents: ＼゛'shihe+
11 In the specification, page 5, line 19 [Small turntable (
4)” to “Small turntable (5)”. (2) On page 6, line 11, "for each upper machine frame" is corrected to "for each upper machine frame." (3) In the drawings, Figures 2 and 3 will be corrected as shown in the attached sheet.

Claims (1)

[Claims] 1. Place a turntable under the RH furnace, set up a cutter piece of the required width on the turntable, and make the cutter piece movable up and down along the four circumferential surfaces of the suction pipe or discharge pipe. , and the cutter piece can be freely rotated around the suction pipe or the discharge pipe by rotation of the turntable, and the cutter piece is also movable in the radial direction. Slag removal equipment.