JPH0669259U - Slag cutting device used for converters, etc. - Google Patents

Abstract

(57) [Abstract] [Purpose] The slag occluder 13 can be reliably and quickly inserted into the tap hole 1a, and after the insertion, the slag occluder 13 can be removed by remote control. [Structure] The converter 1 is arranged adjacent to the converter 1, and when necessary, the converter 1
In the slag cutting device that inserts the slag occluder 13 into the tap hole 1a to block the outflow of slag, the rear end side of the elevation arm 4 is pivoted so that the tip can be vertically swung by the vertical swing mechanism 7. Support. The trolley 10 is installed by the contact / separation moving mechanism 11 so as to be movable toward and away from the converter 1 along the elevation arm 4. The arm 12 is fixed to the trolley 10, and the trolley 1
It is possible to move integrally with 0. The attachment / detachment mechanism 14 that detachably holds the slag occluder 13 so that its tip projects from the tip of the arm 12 is installed in the arm.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for inserting a occluder into a tap hole at the end of tapping of a converter to prevent slag from flowing into the molten steel already discharged from the tap hole.

[0002]

[Prior art]

 A conventional structure of this type of slag cutting device is a structure in which a telescopic arm having a slug occluder suspended in a swing manner, which is disclosed in JP-A-57-19315, is provided adjacent to a converter. The slag cutting device disclosed in Japanese Laid-Open Patent Publication No. 57-19315 is mounted on a moving carriage to secure a working space around the converter (Japanese Laid-Open Patent Publication No. 59-53614), or detachable. A structure in which a slag occluder is held by a telescopic arm and the slag occluder can be inserted into the tap hole (Japanese Patent Publication No. 2-9642).

[0003]

[Problems to be solved by the device]

 By the way, in order to reliably prevent the discharge of slag after the molten steel is tapped from the converter, it is necessary to insert the slag blocker into the tapped mouth of the converter surely and promptly. -19315 and Japanese Patent Laid-Open No. 59-53614, the device having a structure in which the insertion of the slag occluder into the tap hole depends on the flow of molten steel or slag near the tap hole It is difficult to reliably position the slag occluder at the tap hole among the molten steel and slag flowing toward the tap.

[0004] Although the device having the configuration disclosed in Japanese Patent Publication No. 2-9642 is theoretically excellent in that the slag occluder is aligned with the tap hole, it is theoretically excellent. Since there is molten steel or slag above the tap hole when it is inserted into the machine, the operator must operate this device by aiming at the tap hole below the tap hole. , Sure positioning and insertion of slug occluder are not possible.

Further, even after the slag occluder is inserted into the tap hole, the conventional device cannot remotely remove only the slag occluder from the distal end of the telescopic arm.

The present invention has been made in view of the above-mentioned conventional problems, and it is possible to insert the slag occluder into the tap hole in a short time and reliably, and further, after the insertion, the slag occluder can be remotely operated. It is an object of the present invention to provide a slag cutting device that can be used for a converter, etc.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the slag cutting device used in the converter etc. of the present invention is arranged adjacent to the converter etc., and the slag occluder is inserted into the tap hole of the converter etc. when necessary. In the slag cutting device that blocks the outflow of water, the elevation arm that pivotally supports the rear end side so that the tip can swing up and down, the up-and-down swing mechanism of this elevation arm, and the roll-up mechanism guided by the elevation arm. A dolly that can be moved in and out of the furnace and the like, a mechanism for moving the dolly in and out, an arm that is fixed to the dolly and moves integrally with the dolly, and the arm is installed inside this arm and the tip of the arm is It is equipped with an attachment / detachment mechanism that projects from the tip and detachably holds the slag occluder.

[0008]

[Action]

 The slag cutting device used in the converter and the like of the present invention is an arm of a trolley that can be moved toward and away from the converter and the like by being guided by a raising and lowering arm that pivotally supports the rear end side so that the tip can swing up and down. The arm is equipped with a detachable mechanism that allows the tip of the arm to protrude from the tip of the arm and detachably holds the slug occluder. If the amount of separation and movement is set in advance according to the converter etc. in which the slag occluder is inserted, and if the elevation arm and the carriage are swung and moved to that set value, the holding of the slag occluder can be released. The slag occluder can be reliably inserted into the tap hole.

[0009]

【Example】

 Hereinafter, a slag cutting device used in a converter or the like of the present invention will be described based on one embodiment shown in the accompanying drawings. 1 is an overall schematic front view of the slag cutting device of the present invention, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a partial side view of FIG. 1, and FIG. 4 is a schematic explanatory view of an attachment / detachment mechanism of an arm and a slag occluder. 5 is a detailed view of the guide portion and the elevation arm and the tip of the arm when the elevation arm swings up and down, FIG. 6 is a plan view of FIG. 5, and FIG. 7 is the rear end portion of the elevation arm and the positional relationship between the carriage and the arm. A detailed view and FIG. 8 are plan views of FIG.

In the drawings, 1 is a converter, 2 is a backside work floor of the converter 1, 3 is a backside heat insulating door, and the slag cutting device of the present invention is, for example, a backside work floor laid out in this way. It will be installed in the converter building constructed in 2.

Reference numeral 4 denotes a raising / lowering arm, which is pivotally supported at its rear end by a pivot shaft 5a rotatably supported by a bearing 5 installed in the converter building and installed on an upper floor 6 of the converter building. The vertical rocking mechanism 7 can rock vertically with the pivot 5a as a fulcrum.

The vertical swinging mechanism 7 is not limited in its configuration as long as it can swing the tip of the elevation arm 4 up and down by a required angle, but in the present embodiment, it is installed on the upper floor 6. The figure shows that the wire rope 7b wound around the winding drum of the winch 7a is vertically swung by lowering and winding the wire rope 7b. Further, in this embodiment, in order to prevent the horizontal motion of the elevation arm 4 when vertically swinging, as shown in FIGS. 5 and 6, the guide plate 8 is erected on the structure 6a suspended from the upper floor 6. In addition, a guide roller 9 is pivotally supported at a position of the elevation arm 4 facing the guide plate 8. Reference numeral 7c is a wire sheave for changing the direction of the wire rope 7b, and 7d is attached to the final wire sheave 7c to detect the rotation amount of the wire sheave 7c, that is, the movement amount of the wire rope 7b (the swing angle of the elevation arm 4). It shows the rotation speed detector.

Reference numeral 10 denotes a dolly which is guided by a rail laid on the elevation arm 4 to move in and out of the converter 1. In this embodiment, the dolly is designed to smoothly move in and out of the converter 1. The LM guide 10 a is installed on the No. 10. In this embodiment, an AC servomotor 11a is arranged on the rear end side of the elevation arm 4 and is attached to the output shaft of the carriage 10 as the contact / separation moving mechanism 11 of the carriage 10, as shown in FIGS. By rotating the chain drive sheave 11b in the forward and reverse directions, the driven chain 11c and the driven sheave 11e and the index chain drive sheave 11f arranged coaxially with the driven sheave 11e are rotated forward and backward by the drive chain 11c that meshes with the chain. One end of an index chain 11g that meshes with the index chain drive sheave 11f is at a required position of the carriage 10, and the other end is a direction changing sheave 11h installed at the tip side of the elevation arm 4 as shown in FIG. The carriage 10 is attached to a position in front of the position where the one end is attached.

Reference numeral 12 denotes an arm fixed to the trolley 10 so as to be integrated with the trolley 10, and a slag occluder which is inserted into the steel tap 1a of the converter 1 at its tip and closes the tap 1a. 13 is attached. By the way, in the slag cutting device of the present invention, the attachment / detachment mechanism 14 of the slag occluder 13 is attached to the arm 12 so that the slag occluder 13 can be attached and detached from the tip of the arm 12.

The attachment / detachment mechanism 14 may have any structure as long as the slag occluder 13 can be easily and easily attached / detached from the tip of the arm 12, but in the present embodiment, as shown in FIG. An air cylinder 14a is installed inside the rear end, a pipe 14b is attached to a rod of the air cylinder 14a, and the pipe 14b is moved relative to the arm 12 by the rod moving back and forth of the air cylinder 14a. The thing which attaches and detaches 13 is shown.

That is, the holding rod 15 having the elongated hole 15a for inserting the core rod 13a of the slag occluder 13 is attached to the tip of the pipe 14b, and the through hole 12b of the holding rod 15 is opened at the tip of the arm 12. By installing the shielding plate 12a, the rod of the air cylinder 14a moves back and forth relative to the arm 12 via the tube 14b to move the holding rod 15 relative to the arm 12, and the tip side wall surface of the long hole 15a of the holding rod 15 is made. The core rod 13a of the slag occluder 13 which penetrates the long hole 15a together with the shield plate 12a is attached or detached in a sandwiched manner. If the tube 14b is divided in the axial direction, for example, in the case where the tip side is burned out, the cost of parts required for replacement can be reduced and the replacement can be easily performed.

The slag cutting device of the present invention has the above-mentioned structure, and next, the order of closing the tap hole 1a of the converter 1 will be described. Normally, the tap hole 1a of the converter 1 is repaired according to the melting damage condition. Further, the lining bricks of the converter 1 gradually decrease in thickness due to melting loss. That is, the position of the tap hole 1a of the converter 1 changes every moment.

The position of the tap hole 1a and the slag cutting device of the present invention is preliminarily determined by the number of charges within the number of charges that exceeds the allowable size deviation from the position of the tap port 1a obtained from the stop position accuracy range of the slag cutting device of the present invention. In other words, the empty converter 1 without molten steel or slag is tilted, and the slag occluder 13 is inserted and set in the tap hole 1a using the device of the present invention.

Then, the position of the device of the present invention at that time, that is, the swing position of the elevation arm 4 is read from the rotation number detector 7d, and the moving distance of the carriage 10 is built in the AC servomotor 11a. Read from the pulse data stored and input these values to the sequencer CPU. Other data such as the attachment / detachment position of the slag occluder 13, the normal standby position, the passage position of the furnace back heat insulating door 3 and the like are unchanged, so these data are initially input to the sequencer CPU in advance.

When the above preparations are completed, the operator ejects the rod of the air cylinder 14a to insert the core rod 13a of the slag occluder 13 into the elongated hole 15a of the holding rod 15, and then the air cylinder. The rod of 14a is retracted to hold the core rod 13a of the slag occluder 13 in a sandwiched manner by the tip side wall surface of the elongated hole 15a and the shield plate 12a of the arm 12, and then the normal converter tapping operation is performed. Engage in.

Then, at the end of tapping and at the timing of slag cutting, the arm 12 is moved based on the data previously input to the sequencer CPU, and the elevation arm 4 is lowered and swung to slag. The occluder 13 is inserted into the tap hole 1a. After that, the rod of the air cylinder 14a is moved out to remove the slag occluder 13, and the elevation arm 4 and the arm 12 are returned to their original positions to stand by.

[0022]

[Effect of device]

 As described above, according to the slag cutting device of the present invention, the slag occluder can be inserted into the tap hole of a converter or the like in a short time with high positioning accuracy, and after insertion, the slag occluder can be remotely operated. Can be easily removed.

[Brief description of drawings]

1 is an overall schematic front view of a slag cutting device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partial side view of FIG.

FIG. 4 is a schematic explanatory view of an attachment / detachment mechanism of an arm and a slag occluder.

FIG. 5 is a detailed view of a guide portion when the elevation arm swings up and down, and the elevation arm and a tip portion of the arm.

FIG. 6 is a plan view of FIG.

FIG. 7 is a detailed view of the positional relationship between the rear end of the elevation arm and the carriage / arm.

FIG. 8 is a plan view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Converter 1a Steel tapping port 4 Elevating arm 7 Vertical swing mechanism 10 Bogie 11 Contact / separation moving mechanism 12 Arm 13 Slag occluder 14 Attachment / detachment mechanism

Claims (1)

[Scope of utility model registration request] 1. A slag cutting device which is arranged adjacent to a converter or the like, and which inserts a slag blocker into a tap hole of the converter or the like to block outflow of slag when necessary, in which a tip is vertically swingable. And a vertically swinging mechanism for the elevation arm, the rear end side of which is axially supported, a bogie that can be moved toward and away from the converter and the like by being guided by the elevation arm, and a moving mechanism for moving the bogie to and from the bogie. And an arm that is fixed to the dolly and moves integrally with the dolly, and an attachment / detachment mechanism that is installed inside the arm and has a tip protruding from the tip of the arm to detachably hold the slag occluder. A slag cutting device used for a converter.