JPH06285436A - Jet cleaning device for continuous casting roll segment - Google Patents

Abstract

PURPOSE:To remove an attachment to a continuous casting roll segment efficiently by remote-control by ejecting high-pressure water to the attachment. CONSTITUTION:The rotating action of a table of a continuous casting roll segment 8 mounted on a turn table 7, the rotating action of a lift guide post, the forward/backward movement action of a pipe support 21 by a pinion 22 and a track 23, the lift action of a lift table due to the rotation of a screw rod 24, the rotating action of a high-pressure water supply pipe 19 centered around a horizontal shaft and the oscillating action of a jet nozzle 6, are combined to enable free adjustment of the position or direction of a jet nozzle 6 in accordance with the position of an attachment to the continuous casting roll segment 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet cleaning device for a continuous casting segment for removing deposits such as scale and grease attached to the continuous casting segment.

[0002]

2. Description of the Related Art For example, in a curved type continuous casting apparatus, a guide passage is formed by arranging a number of rolls along an arc-shaped curve in order to guide a slab coming out of a mold from a vertical position to a horizontal direction. A secondary cooling zone is provided. The rolls in this secondary cooling zone have a precise relationship between the rolls so that the slabs in this zone contain unsolidified molten steel inside, so that the slabs are not excessively bent. I am maintaining.

Further, since the roll group in the secondary cooling zone is always in contact with the slab, the roll is exchanged for wear of the roll, damage of the roll due to heat effect from the slab, or change of slab size. There is a need. Considering this replacement work, the roll group in the secondary cooling zone is divided into roll segments with a plurality of roll pairs as one unit, and roll replacement is performed for each roll segment. There is.

By the way, it is inevitable that foreign matters such as scales and grease adhere to the frame and shaft of the roll segment during continuous casting, and deposits are formed, and when these deposits solidify and grow, continuous casting occurs. Since this causes a hindrance, cleaning work is performed to remove deposits with the roll segment removed, such as during roll replacement. Generally, the continuous casting roll segment is cleaned by removing the deposits with a chisel or a hammer or by blowing it away with air. In addition, as a case of using a mechanical tool, there is also a case of crushing and removing the adhered substances with an air breaker like a rock drill.

In Japanese Utility Model Publication No. 60-27564, the outside of each of the gaps formed between the lower end of the long side of the mold and the foot shoe or the cooling plate is at right angles to the injection direction of the mold spray nozzle, and the long side of the mold. There is disclosed a powder removing device at the lower end of the continuous casting mold in which high-pressure spray nozzles for spraying in parallel are installed to face each other.

[0006]

The method of working with a hand tool as in the above-mentioned prior art is a heavy-duty work mainly by human power,
The work efficiency is poor, it takes time to remove the deposits, and the work environment becomes a dust atmosphere, so-called 3K work. Furthermore, after removing the adhering matter, the adhering matter that has fallen on the work floor must be scraped off with a scoop or broom to remove it, which is troublesome.

Further, since the technique disclosed in Japanese Utility Model Publication No. 60-27564 is to remove the powder accumulated between the lower end of the long side of the mold and the foot shoe or the cooling plate, the frame and the bearing of the continuous casting roll segment. It is not possible to remove the deposits at various places such as. In particular, although a portable jet cleaning machine has been developed as a machine for removing deposits, it is difficult to operate the jet nozzle three-dimensionally and mechanize it. Therefore, it is recommended that the operator manually operate the jet nozzle. It is the mainstream.

The present invention solves the above-mentioned problems of the prior art,
It is an object of the present invention to provide a jet cleaning device for a continuous casting roll segment that mechanizes work and enables remote control.

[0009]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a turntable on which a continuous casting roll segment to be cleaned is mounted, and a turntable mounted in the vicinity of the turntable so as to be rotatable about a vertical axis. Lift guide post, a lift table that is set up and down along the lift guide post, a pipe support installed on the lift table so that it can move forward and backward, and a horizontal axis of the pipe support. A high-pressure water supply pipe that is rotatably driven around the center of the pipe, and a jet that ejects high-pressure water that is freely swingable at the tip of the high-pressure water supply pipe and that has adjustable cleaning positions for continuous casting roll segments. A jet cleaning device for a continuous casting roll segment, comprising a nozzle.

In the present invention, the drainage recovery pit under the turntable for collecting the drainage after cleaning the continuous casting roll segment with the high pressure water ejected from the jet nozzle, and the drainage collected in the drainage recovery pit are pumped up. It is preferable that the apparatus is provided with a settling tank for settling and separating foreign matters stored and floating in the waste water, and a circulation device for circulating the clean water settling and separating in the settling tank to a jet nozzle via a high-pressure water pipe.

[0011]

Since the present invention has the above-described structure, the continuous casting roll segment mounted on the turntable rotates the table, the guide post rotates to rotate the jet nozzle, and the lift moves up and down to raise and lower the jet nozzle. Operation,
By combining the forward / backward movement of the jet nozzle by the forward / backward movement of the pipe support, the rotational movement of the jet nozzle by the rotation of the high-pressure water supply pipe, and the horizontal swing movement of the jet nozzle, all the parts attached to the continuous casting roll segment can be Since the high pressure water ejected from the jet nozzle can be struck corresponding to the attached matter, the attached matter can be reliably washed. High-pressure water needs to be pressurized to at least 200 kg / cm ² .

Waste water after cleaning the continuous casting roll segment is collected in a waste water recovery pit, and the waste water is guided to a settling tank to clean and separate foreign matters floating in the waste water. It will be possible and automation will be possible.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, a continuous casting roll segment 8 to be cleaned is placed on a rotatable turntable 7. In addition, in the vicinity of the turntable 7, an elevating guide post that rotates about a vertical axis on the swivel gear 27.
37 is installed, and a small gear 39 driven by a turning motor 28 is meshed with the turning gear 27.

As shown in FIGS. 2 and 3, a lift table 38 is set on the lift guide post 37 so that it can be lifted and lowered.
A screw rod 24 provided between a bracket 40 provided at the top of the elevating guide post 37 and the turning gear 27 is screwed into the nut portion 25 provided on the elevating table 38. The upper end and the lower end of this screw rod 24 are rotatably supported by bearings (not shown). Since the nut portion 25 is raised or lowered by the force, the lift base 38 integrated with the nut portion 25 is raised or lowered along the lift guide post 37.

A plurality of pinions 22 are arranged on the lift table 38, and a rack 23 is engaged with the upper portions of these pinions 22. Further, the pipe support 21 is provided on the rack 23.
Is provided, and the pipe support 21 can be moved forward and backward by rotating the pinion 22 forward or backward by a motor (not shown). The pipe support 21 has a high-pressure water supply pipe 19 supported via bearings 29 set at both ends, and the high-pressure water supply pipe 19 is provided with a rotary gear 31 provided on one bearing 29 side. The rotary gear 31 meshes with a rotary gear 41 rotated by a pipe rotating motor 30, and by rotating the motor 30, the high-pressure water supply pipe 19 is rotated about a horizontal axis.

A high pressure hose is provided on the inlet side of the high pressure water supply pipe 19.
17 is connected through the rotary joint 18 on the inlet side, and U is on the outlet side.
It is bent in a letter shape, and its tip is connected to the nozzle base 5 (shown in the case of facing upward in the drawing) via the outlet side rotary joint 20. A jet nozzle 6 is fixed to the nozzle base 5 in the horizontal direction, and a sprocket 32 is attached to the tip end portion.

A chain 33 having a length required to rotate the sprocket 32 to rotate the nozzle base 5 together with the jet nozzle 6 is wound around the sprocket 32, and each chain 33 has two wires at both ends. It is connected to 34. The two wires 34 penetrate the inside of the pipe support 21, one of which is fixed to the piston rod tip 42 of the swing cylinder 35 attached to the rear end of the high-pressure water supply pipe 19, and the other of which is a plurality of pipes. It is also fixed to the piston rod tip portion 42 via a roller 43.

Therefore, when the swing cylinder 35 is extended or contracted, the two wires 34 are rotated clockwise or counterclockwise, so that the sprocket 32 is rotated via the chain 33. As a result, the nozzle base 42 integrated with the sprocket 32 rotates, and the jet nozzle 6 attached to the nozzle base 42 swings. When cleaning the adhering matter such as the frame or shaft of the continuous casting roll segment 8 placed on the turntable 7, the adhering matter adheres to the continuous casting roll segment 8. Turntable 7 so that position approaches jet nozzle 6
To rotate and stop.

Next, the turning motor 28 is driven, and the turning gear 27 is rotated through the small gear 39, whereby the lifting guide post 37, the screw rod 24 and the lifting table 38 are integrally rotated and mounted on the lifting table 38. The jet nozzle 6 attached to the tip of the high pressure water supply pipe 19 is directed to the position of the deposit on the continuous casting roll segment 8 placed on the turntable 7.

At the same time, the screw rod drive motor 26 is driven to rotate the screw rod 24 to move the elevating table 38 up and down to align the height of the deposit on the continuous casting roll segment 8. Subsequently, the pinion 22 is rotationally driven to advance the pipe support 21 through the rack 23 to bring the jet nozzle 6 close to the deposit on the continuous casting roll segment 8. High-pressure water supplied from the high-pressure hose 17 through the high-pressure water supply pipe 19 is ejected from the jet nozzle 6 to collide with the deposits on the continuous casting roll segment 8 and the swinging cylinder 35 is extended and contracted alternately. The deposit is washed and removed. At this time,
The pipe rotating motor 30 is driven at a proper time, the high pressure water supply pipe 19 is rotated through the rotating gear 41 and the pipe rotating gear 31, and the position of the jet nozzle 6 is adjusted, thereby improving the efficiency of the work of removing deposits.

It is needless to say that the above-described operation sequence is appropriately performed in any order depending on the attachment position and range of the deposits deposited on the continuous casting roll segment. As shown in FIG. 1, a drainage pit 9 is installed below the turntable 7. The drainage pit 9 is washed with high pressure water jetted from the jet nozzle 6 to remove the drainage from the turntable 7 Collected in the drainage pit 9 by the large foreign matter collection net pack 36 arranged below the periphery of the.
The water level of the drainage stored in the drainage pit 9 is measured by the pit level meter 14, and when it reaches a predetermined level, the drainage pump 10
Is transferred to the settling tank 11.

Foreign matters floating in the waste water are precipitated and separated in the settling tank 11, and the supernatant clean water flows into the circulation tank 12. Circulation tank
The level of the clean water stored in 12 is measured by a circulation tank level meter 15, and when it reaches a predetermined level, it is once transferred to the sub tank 2 by the circulation pump 13 and used again as cleaning water. The water level in the sub tank 2 is measured by the sub tank level meter 16. When the clean water drops to a predetermined level, the fresh water supply valve 1 is opened to replenish the sub tank 2 with water. If the fresh water supply valve 1 is closed at the time when the water is balanced, for the time being thereafter, only the circulating water is used, and the lost water amount may be periodically replenished.

The clean water stored in the sub-tank 2 becomes high-pressure water by the operation of the jet device 3, from the pipe and the high-pressure hose 17, through the high-pressure water supply pipe 19 via the inlet rotary joint 18, and further to the outlet side. As described above, the high pressure water is jetted from the jet nozzle 6 through the rotary joint 20 to the jet nozzle 6 provided on the nozzle base 5. Regarding the automatic circulation of wastewater, by controlling the operation of the drainage pump 10 and the circulation pump 13 based on the levels of the pit level meter 14, the circulation tank level meter 15 and the sub tank level meter 16 and controlling the opening and closing of the new water supply valve 1. It will be possible. The large foreign matter generated from the continuous casting roll segment 8 can be used for improving the cleanliness of the circulating water when received by the large collecting net pack 36 (the mesh is about 2 mmφ).

[0024]

As described above, according to the present invention, the jet nozzle attached to the tip of the high-pressure water supply pipe can be freely moved in any position and direction by a combination of swiveling, lifting, moving forward and backward, rotating, and swinging. It has a mechanism. The waste water used for washing is a system in which floating foreign substances are separated and removed by settling, circulated and reused.

For this reason, the deposit adhered to the continuous casting roll segment can be efficiently cleaned by remote control using the jet nozzle, so that the working time is shortened and the working load is reduced. As a result, reduction of maintenance cost, improvement of safety and improvement of environment can be achieved.

[Brief description of drawings]

FIG. 1 is a flow chart showing an entire jet cleaning device for a continuous casting roll segment according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a jet cleaning apparatus according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 New water supply valve 2 Sub tank 3 Jet device 4 Piping 5 Nozzle base 6 Jet nozzle 7 Turntable 8 Continuous casting roll segment 9 Drain pit 10 Drain pump 11 Settling tank 12 Circulating tank 13 Circulating pump 14 Pit level meter 15 Circulating tank level meter 16 Sub-tank level gauge 17 High pressure hose 18 Inlet rotary joint 19 High pressure water supply pipe 20 Outlet rotary joint 21 Pipe support 22 Pinion 23 Rack 24 Screw rod 25 Nut part 26 Screw rod drive motor 27 Swing gear 28 Swing motor 29 Bearing 30 Pipe rotation Motor 31 Pipe rotating gear 32 Sprocket 33 Chain 34 Wire 35 Swing cylinder 36 Large foreign substance collection net pack 37 Lifting guide post 38 Lifting platform 39 Small gear 40 Bracket 41 Rotating gear 42 Piston rod tip 43 Roller

Claims (2)

[Claims] 1. A turntable on which a continuous casting roll segment to be cleaned is placed, an elevation guide post rotatably driven around a vertical axis in the vicinity of the turntable, and an elevation along the elevation guide post. An elevating table set to be freely drivable, a pipe support installed on the elevating table so as to move forward and backward, and a high-pressure water supply pipe rotatably supported around a horizontal axis of the pipe support. Of the continuous casting roll segment, which is provided at the tip of this high-pressure water supply pipe so as to be swingable, and has a jet nozzle for ejecting high-pressure water whose cleaning position with respect to the continuous casting roll segment is adjustable. Jet cleaning device. 2. A drainage recovery pit provided below a turntable for recovering drainage after cleaning deposits on a continuous casting roll segment with high-pressure water ejected from a jet nozzle, and drainage recovered in this drainage recovery pit. The present invention is characterized by comprising a settling tank for settling and separating foreign matter floating up in the drainage that is pumped up and stored, and a circulation device for circulating the clean water settled and separated in the settling tank to a jet nozzle through a high pressure water supply pipe. The jet cleaning device for a continuous casting segment according to claim 1.