JP3086176B2 - Nozzle receiving brick cleaning device for molten metal containers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device for removing deposits attached to a nozzle brick to which an insert nozzle for removing molten metal from a molten metal container such as a tundish or a ladle is attached.

[0002]

2. Description of the Related Art An insert nozzle for extracting molten metal is provided at the bottom of a molten metal container such as a tundish or a ladle.
A slide valve for controlling the flow of molten steel is provided. Conventionally, the replacement of the insert nozzle and the slide valve has been performed manually. However, the replacement work by the manual power is inferior in work efficiency and inferior in safety.
In addition, the work is hot, resulting in heavy labor. As a countermeasure, when replacing the slide valve, the applicant has proposed various technologies to mechanize the removal of adhering matter on the inner surface of the nozzle brick and the cleaning work, which is the work using the hot breaker in the worst working environment. (For example, Japanese Patent Application No.
No. 3392).

An outline will be described with reference to FIGS. 8 to 10 by taking the above proposal as an example. As shown in FIG. 8, the nozzle brick cleaning device main body is detachably supported and fixed to a mounting base 46 fixed to the steel shell 2 of the molten metal container 1 such as a ladle via a mounting arm 45. The device body is
A support plate 40 fixed to the mounting arm 45 and opposed to the steel shell 2, a peripheral portion of which is surrounded and restrained by an edge 41 of the support plate 40, and a rectangular sliding plate 5 provided facing the support plate 40.
0, having a main shaft 34 supported by the extension 50a of the sliding plate 50 and having the cleaning head 30 provided at the tip.

An edge 41 formed on the support plate 40 is bent inward at a predetermined height from the bottom surface of the support plate, and a sliding plate 50 is provided between the bottom surface of the support plate and the edge. The periphery is located and restrained.

[0005] A rectangular through hole is formed at the center of the support plate 40 and the slide plate 50, and a slide plate extension 50a is formed at the lower side of the slide plate 50 where the through hole is formed. Are provided through the through holes. On the extension 50a of the sliding plate, a hydraulic cylinder 51 for moving the spindle back and forth, and a track rail 5
2 are provided, and the support member 35 is supported by a linear bearing 53 that can run on the track rail 52. The support member 35 has a connection fitting 54 that engages with the tip of a hydraulic cylinder 51 for moving the spindle back and forth.
Thus, the vehicle runs on the track rail 52 in the front-rear direction. The support member 35 supports, via a spindle bearing 33, a main shaft 34 provided with a cleaning head at the tip, and a hydraulic motor 31 provided on the support member 35.
The main shaft 34 and the main shaft 34 can be connected by a coupling 32. When the two are connected by the coupling 32, the main shaft 34 is driven to rotate by the hydraulic motor 31.

As shown in FIG. 9, a pair of vertical alignment hydraulic cylinders 44 is provided on the upper and lower sides of the support plate 40, and a pair of left and right alignment hydraulic cylinders are provided on the left and right sides of the support plate 40. Each of the cylinders 46 is provided. As shown in FIG.
The piston 45 of the hydraulic cylinder 44 for vertical alignment and the piston 47 of the hydraulic cylinder 46 for horizontal alignment are in contact with the sliding plate 50. By operating the hydraulic cylinder, the sliding plate 50 moves vertically and horizontally. It is possible. One set of hydraulic cylinders for centering is provided facing each other in the vertical and horizontal directions, and accurate movement can be performed by operating the pair of hydraulic cylinders facing each other. Since the sliding plate 50 is pressed against the supporting plate 40 by the sliding plate fixing elastic members 43 provided on, for example, the upper side and the lower side of the edge 41 of the supporting plate 40, the sliding plate 50 moves vertically and horizontally. Moves while in contact with the support plate 40, that is, slides.

The sliding plate 50 is pressed against the supporting plate 40 by, for example, a sliding plate fixing hydraulic cylinder 42 provided at a diagonal position of the supporting plate 40. When removing the deposit on the brick 3, the hydraulic cylinder 42 is operated to press the sliding plate 50 against the support plate 40.

When removing the adhered substance, the cleaning plate 30 is aligned by moving the sliding plate 50 up and down and left and right by the hydraulic cylinder 44 for vertical alignment and the hydraulic cylinder 46 for horizontal alignment. At the center of the nozzle brick 3, the spindle 34 is advanced by the spindle hydraulic cylinder 51 for forward and backward movement, and fine adjustment of vertical and horizontal alignment is further performed while the spindle 34 is advanced as necessary. Do. Then, the hydraulic motor 31 is driven, the hydraulic motor 31 and the main shaft 34 are coupled by the coupling 32 to drive the cleaning head 30 to rotate, and the hydraulic cylinder 42 is operated to move the sliding plate 50 to the support plate 40. The cleaning head 30 is inserted into the loose brick 3 by pushing the spindle 34 forward by the hydraulic cylinder 51 for moving the spindle forward and backward to remove the deposits.

[0009]

In the conventional cleaning device as described above, it is necessary to mount the mounting base by welding to a steel skin for positioning and fixing the device. Further, since a drive mechanism such as a lock mechanism for the cleaning device and a mounting base welded to the molten metal container and a hydraulic unit is also required, the size of the device is increased and the cost is increased. Further, it takes a long time to attach and detach the cleaning device, and the cleaning time cannot be reduced. In addition, since the mounting base is welded to each molten metal container, the cost is further increased by the number of molten metal containers, and
There was a problem that it was not possible to cope with the misalignment of the nozzle receiving brick, and uncut portions and overcut portions were generated to cause a steel leak due to variations in the mortar joint thickness thickness.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a nozzle receiving brick cleaning apparatus for a molten metal container capable of reducing the size and weight of the apparatus and shortening the time for attaching and detaching the apparatus and the time for cleaning. The purpose is to provide.

[0011]

According to the present invention, there is provided an apparatus for cleaning a nozzle receiving brick of a molten metal container, comprising: a bottom plate for the sliding valve apparatus; A member that can be fixed to the fixing hardware is provided in the cleaning device, and the slide valve device is used for positioning the cleaning device. Further, the present invention includes a bottom plate fixing hardware in supportable fixed fixing member of the slide valve device, when fixing the fixing member by the bottom plate fixing hardware, the center of the rotary shaft head hardware is attached to the distal end And a cleaning device main body attached to the fixing member so as to substantially coincide with the center of the nozzle. Further, according to the present invention, the cleaning device main body rotatably supports the rotation shaft with an inner cylinder slidable with respect to the outer cylinder supported by the fixing member, and drives the rotation shaft with a driving source. It is characterized by the following. Further, the present invention is characterized in that the angle of the rotation axis can be freely changed up and down and left and right with a support portion of the outer cylinder by the fixing member as a fulcrum.

[0012]

Embodiments of the present invention will be described below. FIG. 1 is a diagram illustrating an example of the cleaning device of the present invention. The fixing member 9 of the cleaning device main body 5 is fixed using a slide valve device 4 attached to the steel shell 2 of the molten metal container 1 as described later. The cleaning device main body 5 has a structure in which the inner cylinder 17 is held by the outer cylinder 18 and the inner cylinder 17 is slidable in the outer cylinder 18. At the fixing member 9. As shown in FIG. 2, the slide mechanism of the inner cylinder 17 has a key groove 17a having a predetermined length formed in the inner cylinder 17 in the axial direction.
A key 18a extending from the outer cylinder 18 is fitted so that the inner cylinder 17 can slide by the length of the key groove. The ring 22a fitted to the outer cylinder 18 is fixed by bolts (not shown), and the eyebolts are used as the suspenders 22. Although not shown in the drawings, the slide may be performed by a linear guide or a method of supporting and fixing on both sides instead of the inner cylinder and the outer cylinder.

A head metal 13 is attached to the tip of the rotating shaft 12 supported by the bearing 16 on the inner cylinder 17.
A blade 11 is mounted around the periphery. This rotating shaft 1
2 is rotationally driven via a drive motor 15 and a speed reducer 14, and the blade 11 cuts and removes deposits on the nozzle receiving brick. The drive motor 15 is driven by connecting the cable 23 to a power supply and operating the switch 21. Of course, means other than the motor drive, for example, a hydraulic motor or the like may be appropriately used. In addition, it is also possible to support not with a bearing but with a bush (metal).

Next, the attachment of the cleaning device body to the slide valve device will be described with reference to FIGS. In FIG. 3, a slide valve device 4 is attached to a steel shell 2 at the bottom of a molten metal container 1. The slide valve device 4 may be either a two-layer type or a three-layer type. The cleaning device of the present invention is fixed using the bottom plate fixing metal 7 of the slide valve device 4.

FIG. 4 is a view for explaining the bottom plate fixing mechanism 6. The bottom plate fixing mechanism 6 is attached to the steel shell side to support and fix the bottom plate brick, and forms a valve in cooperation with a slide plate (not shown). In the original slide valve device, the bottom plate brick is fixed by the bottom plate fixing hardware 7, but in the present invention, a fixing member 9 made of a metal having the same shape as the support fixing portion of the bottom plate brick is manufactured. The fixing member 9 is fixed by the bottom plate fixing hardware 7, and the cleaning device main body 5 is attached to the fixing member 9. Originally, when the bottom plate brick is fixed by turning the set bolt 8, the opening center of the bottom plate brick is configured to coincide with the nozzle center 28. By using the prepared fixing member 9 and attaching the cleaning device main body 5 so that the position corresponding to the center of the opening of the bottom plate brick is the center of the rotation axis, the set bolt 8
In this state, the center 28 of the nozzle coincides with the center of the rotating shaft. That is, in FIG. 4, when the set bolt 8 is turned, the crescent-shaped portion 7a of the bottom plate fixing hardware 7 moves along the side of the fixing member 9 having the same shape as the support fixing portion of the bottom plate in plan view, and the fixing member is moved. The nozzle is set at a predetermined position and fixed. At this position, the center of the nozzle 28 and the center of the rotating shaft 12 coincide. Of course, the center of the rotating shaft 12 does not need to be completely coincident with the nozzle center 28, and may be shifted to such an extent that practically no problem occurs. The bottom plate fixing mechanism 6 shown in FIG. 4 is provided with several circular openings in addition to the viewing window 25, for reducing the weight of the fixing member 9.

The cleaning operation in the case where the nozzle receiving brick 3 has no misalignment will be described.
The inner cylinder 17, which is slidably held, is pulled out toward the drive motor as shown in FIG. After the cable is connected to the power source, the lifting device 22 is hung by the handheld or hoist crane (not shown) of the cleaning device main body 5, and the cleaning device main body 5 is hung on the plate set surface of the slide valve device 4 attached to the steel shell 2 of the molten metal container 1. After the fixing member 9 is set, the set bolt 8 of the bottom plate fixing mechanism 6 is turned, and the bottom plate fixing hardware 7 is used to surely fix and fix the position. The switch is turned on to drive the motor to rotate the head metal 13 attached to the tip of the rotating shaft 12 via the bearing 16. At this time, the rotation of the drive motor is reduced by the reduction mechanism 14, and the rotation torque increases. As shown in FIG. 3, while gradually sliding the inner cylinder 17 held by the outer cylinder 18, the head metal 13 is advanced until the blade 11 comes into contact with the cutting 24. The cutting object 24 is inserted up to the advance limit while checking the cleaning state in which the cutting tool 11 cuts the cutting object 24 with the viewing window 25 (FIG. 4). Further, the head metal 13 is slightly retracted to reconfirm the cleaning state of the inner surface of the nozzle receiving brick 3, and if there is an uncut portion, it is reinserted to continue the cleaning. When the inner surface of the nozzle receiving brick 3 is completely cleaned, the head metal 13 is moved backward to the retreat limit while rotating. The switch 21 is turned off, the drive motor 15 is stopped, and the rotation of the head hardware 13 is stopped.

Next, after the set bolt 8 is loosened to release the fixing of the fixing member 9, the cleaning device main body 5 is lowered to a predetermined position by a hand-held or hoist crane, and the cleaning operation is completed.

Next, an example of an embodiment which can cope with a case where the nozzle receiving brick has a misalignment will be described. 5 is a diagram for explaining the operation of the cleaning device when there is misalignment, FIG. 6 is a detailed diagram of a fixing portion of the cleaning device, and FIG. 7 is a diagram for explaining a method of attaching a disc spring in the fixing portion. As shown in the detailed view of FIG. 6, the projecting portion 18b at the distal end of the outer cylinder 18 is held by a holding flange 19, and several peripheral portions are bolted. In all or some of the bolts, a disc spring 20 is provided with a fixing member 9.
And overhang 18b. That is, as shown in FIG. 7, a through hole for a bolt is formed in the center of the disc spring 20, and a projecting portion 18 b at the distal end of the outer cylinder 18 is formed.
(Shallower than the thickness of the disc spring), and is disposed between the fixing member 9 and the flange 19 by bolts and nuts. Therefore, the rotation shaft 12 can be tilted within a predetermined angle vertically and horizontally freely by the elasticity of the disc spring. FIG. 6 shows a case where the outer cylinder 18, that is, the rotation axis is inclined. At this time, the lower disc spring is compressed to the preload dimension, and the upper disc spring is in a compressed state larger than the preload dimension.

Next, the cleaning in the case where the nozzle receiving brick has a misalignment will be described with reference to FIG. FIG.
In the case where there is misalignment in the nozzle receiving brick 3, the drive motor 15 is pushed up in the direction of arrow 27 by hand, and the rotating shaft 12 is shifted from the nozzle center 28 (FIG. 4) by a predetermined angle about the fixed portion 10 as a fulcrum. An uncut portion due to misalignment of the nozzle receiving brick 3 is eliminated. This angle can be freely swung up, down, left and right. When there is no misalignment of the nozzle receiving brick, since it is vertically pressed and fixed to the nozzle center 28 by the disc spring 20, there is no concern that the angular misalignment will occur unless a load is applied in the direction of the arrow or in the opposite direction. If there is no need to deal with misalignment of the nozzle receiving brick,
The outer cylinder 18 may be directly fixed to the fixing member 9 without using the disc spring 20.

[0020]

As described above, according to the present invention, the fixing device for fixing the cleaning device to the molten metal container uses the brick holding metal for fixing the bottom plate of the slide valve device. There is no need to weld the mounting base to the container, which makes it possible to reduce the cost and the mounting time.In addition, the rotating shaft of the cleaning device can be moved in any direction with the fixing part of the bottom plate fixing metal as a fulcrum. If the angle can be freely changed, it is possible to eliminate the occurrence of the uncut portion by moving the head metal toward the uncut portion due to the misalignment of the nozzle receiving brick.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the overall configuration of a cleaning device according to the present invention.

FIG. 2 is a diagram illustrating a sliding mechanism of an inner cylinder.

FIG. 3 is a diagram illustrating attachment of a cleaning device to a slide valve device and removal of deposits on a nozzle receiving brick.

FIG. 4 is a diagram illustrating attachment of a cleaning device by a bottom plate fixing mechanism of the slide valve device.

FIG. 5 is a diagram for explaining the operation of the cleaning device when there is misalignment.

FIG. 6 is a detailed view of a fixing portion (A portion in FIG. 5) of the cleaning device.

FIG. 7 is a diagram illustrating a method of attaching a disc spring.

FIG. 8 is a view illustrating a conventional nozzle receiving brick cleaning device.

9 is a front view of the device of FIG.

FIG. 10 is a view for explaining a drive mechanism of the sliding plate in FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Molten metal container, 2 ... Steel, 3 ... Brick for nozzle receiving, 4
... Slide valve device, 5 ... Cleaning device body, 6
... bottom plate fixing mechanism, 7 ... bottom plate fixing hardware, 8 ... set bolt, 9 ... fixing member, 10 ... fixing part,
11: blade, 12: rotating shaft, 13: head metal, 14:
Reduction gear, 15: drive motor, 16: bearing, 17
... inner cylinder, 18 ... outer cylinder, 19 ... holding flange, 20 ... disc spring, 21 ... switch, 22 ... hanging tool, 23 ... cable, 2
4 ... cut thing, 25 ... viewing window.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-6-213576 (JP, A) JP-A-8-19857 (JP, A) JP-A-62-234645 (JP, A) (58) Investigation Field (Int. Cl. ⁷ , DB name) B22D 43/00 F27D 3/15 F27D 23/02

Claims (4)

(57) [Claims] An apparatus for cleaning a nozzle receiving brick of a molten metal container to which a slide valve device is attached, wherein the slide valve device has a bottom plate fixed thereto .
Provided members that can be fixed to the hardware in the cleaning device, Sula
A nozzle receiving brick cleaning device for a molten metal container, wherein an id valve device is used for positioning a cleaning device. 2. A cleaning device according to claim 1, and the bottom plate fixing hardware in supportable fixed fixing member of the slide valve device, when fixing the fixing member by the bottom plate fixing fittings, head hardware to tip And a cleaning device main body attached to the fixing member such that the center of the rotation shaft to which is attached substantially coincides with the center of the nozzle. 3. The cleaning device body according to claim 2, wherein the cleaning device main body rotatably supports the rotation shaft with an inner cylinder slidable with respect to an outer cylinder supported by the fixing member, and further includes the rotation shaft. A nozzle receiving brick cleaning device for a molten metal container, wherein the shaft is driven by a driving source. 4. The nozzle receiving brick of a molten metal container according to claim 3, wherein the angle of rotation of the rotating shaft can be changed freely up and down and left and right with a support of the outer cylinder by the fixing member as a fulcrum. Cleaning device.