KR20170061909A - Water-jet device of scarfing apparatus - Google Patents

Water-jet device of scarfing apparatus Download PDF

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Publication number
KR20170061909A
KR20170061909A KR1020150167071A KR20150167071A KR20170061909A KR 20170061909 A KR20170061909 A KR 20170061909A KR 1020150167071 A KR1020150167071 A KR 1020150167071A KR 20150167071 A KR20150167071 A KR 20150167071A KR 20170061909 A KR20170061909 A KR 20170061909A
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KR
South Korea
Prior art keywords
jetting
straight
header
pressure water
molten slag
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KR1020150167071A
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Korean (ko)
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KR101756205B1 (en
Inventor
임승호
박영선
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주식회사 포스코
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Priority to KR1020150167071A priority Critical patent/KR101756205B1/en
Publication of KR20170061909A publication Critical patent/KR20170061909A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • B22D11/1265—Accessories for subsequent treating or working cast stock in situ for cutting having auxiliary devices for deburring

Abstract

A high-pressure water jetting device of a scarifying device is disclosed. The high-pressure water injection device of the scarfing apparatus according to the embodiment of the present invention includes a spray header for spraying high-pressure water to remove melted slag generated in the scaping process of the main scaffold, and a support unit for supporting the spray header, The header includes a straight jet opening for spraying a straight water stream on the surface of the cast steel to remove molten slag flowing along the surface of the cast steel and a spread jet opening for removing the molten slag scattering by spraying a diffusion water stream into a space separated from the cast steel surface.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a high-pressure water jetting device for a scarfing device,

The present invention relates to a high-pressure water jetting device of a scarifying device for removing slag generated in a scaping process of a primary scaffold.

The slabs produced in the continuous casting process are cut to a suitable length after molding, heated in a reheating furnace, and then put into a rolling mill to produce hot-rolled coils. However, the cast steel produced in the continuous casting process often has a corner crack in the corner area. Particularly, in the case of steel such as medium carbon steel having a swelling reaction, the generation of corner cracks is severe.

Corner cracks in cast steel can lead to operating accidents such as sheet breakage in the rolling process and cause edge scab defects in the produced hot rolled coils, which may necessitate a significant amount of cutting of the hot rolled coil corners. Therefore, the cast steel of which the crack is likely to occur is subjected to scarfing to remove the surface layer and edges before the rolling process.

The scarping operation is carried out by a scarfing device in the course of transporting the slabs as in the example of Korean Patent Laid-Open Publication No. 10-2012-0001823 (published on 2012. 05. 05) and 10-2012-0073691 Spread the surface layer or corners of the casting using a scarfing nozzle.

The molten slag that occurs during the scarfing operation adheres to the surface of the casting, which may adversely affect the quality of the casting or may adhere to the peripheral device and become contaminated. Therefore, the conventional scarfing apparatus has a collecting chamber for collecting and discharging the molten slag generated in the scarping process, and a high-pressure water jetting device for spraying the high-pressure water to remove molten slag. The high-pressure water injector typically injects high-pressure water in front of the scarfing nozzle to remove slag flowing or scattering along the surface of the slab.

However, since a high-pressure water injection device applied to a conventional scarfing device often fixes the injection port, when the scraper is moved up and down in the scouring process, the high-pressure water is not sprayed onto the molten slag, There was a problem. That is, due to the displacement of the slag in the thickness direction of the cast steel, the position of the molten slag flowing in the surface layer of the slab is changed, and the high pressure water is not injected toward the slag.

Further, in the case of a high-pressure water jetting apparatus, it is necessary to adjust the injection position when the steel type, thickness, etc., of the cast steel which performs scarping are changed. However, in the conventional high-pressure water jetting apparatus, adjustment of the injection position and the spray angle is difficult.

Korean Patent Laid-Open Publication No. 10-2012-0001823 (published on Jan. 05, 2012) Korean Patent Publication No. 10-2012-0073691 (published on 07. 05., 2012)

An embodiment of the present invention is to provide a high-pressure water injection device of a scarifying device capable of smoothly removing molten slag generated in the scarifying process in spite of the thickness direction displacement of the casting.

It is another object of the present invention to provide a high-pressure water injection device of a scarifying device capable of easily adjusting the injection direction and injection position of high-pressure water.

According to an aspect of the present invention, there is provided a spraying apparatus comprising: a spray header for spraying high-pressure water to remove molten slag generated in a scaping process of a main body; and a support unit for supporting the spray headers, A scouring device including a straight jet opening for spraying a straight water stream to remove molten slag flowing along the surface of the cast steel, and a spread jet opening for removing molten slag scattered by spraying a diffusion water stream into a space separated from the surface of the cast steel A high-pressure water jetting device may be provided.

The straight jetting port may include a first straight jetting port and a second straight jetting port for jetting straight water streams having different distances from the surface of the cast steel.

The jet headers are rotatably supported by the support unit and the first straight jetting openings and the second straight jetting openings are spaced apart from each other in a rotation direction of the jetting headers at a position eccentric from the rotational center of the jetting headers .

The spread jet opening may include a first spread jet opening and a second spread jet opening for jetting a diffusion stream in a state where the spread jet openings are spaced apart from each other.

The supporting unit includes: a first supporting part extending in a feeding direction of the casting in a fixed state; A second support portion mounted on the first support portion so as to be movable in a longitudinal direction of the first support portion and in a direction intersecting with the first support portion; And a jet header supporting part coupled to the second support part to support the jet headers.

The supporting unit may further include a moving member provided on the jetting header supporting unit so as to be movable in the feeding direction of the casting member and a rotation supporting unit provided on the moving member for supporting the jetting head so as to be capable of rotating and spraying .

The moving member can move in the feeding direction of the casting by the rotation of a screw shaft provided in the jetting head supporting portion.

According to another aspect of the present invention, there is provided a spraying apparatus comprising: a spray head having a plurality of spray nozzles for spraying high-pressure water to remove molten slag generated in a scarfing process of a mainspring; and a support unit for rotatably supporting the spray headers, And the plurality of ejection openings are spaced apart from each other in a rotation direction of the ejection header at a position eccentric from the rotation center of the ejection header.

The high-pressure water injection device of the scarfing apparatus according to the embodiment of the present invention ejects a straight water stream to a region close to the surface of the main body of the jetting header, and the spread jet opening of the jetting header ejects a diffusion water stream It is possible to smoothly remove both the molten slag flowing along the surface of the cast steel and the molten slag scattering into the space.

Since the high-pressure water jetting device of the scarfing device according to the embodiment of the present invention has a plurality of straight jetting openings for spraying straight water streams having different distances from the surface of the cast steel at positions close to or in contact with the surface of the cast steel, It is possible to smoothly remove the molten slag flowing along the surface of the slab in spite of the vibration of the slab or the displacement due to bending.

The high pressure water injection device of the scarfing device according to the embodiment of the present invention can easily adjust the position and angle of the jetting head by operating the supporting device and can also adjust the jetting condition of the jetting headers The injection direction of the high-pressure water and the injection position can be easily adjusted.

1 shows a scarf apparatus to which a high-pressure water jet apparatus according to an embodiment of the present invention is applied.
FIG. 2 shows an example in which the high-pressure water jetting device according to the embodiment of the present invention injects high-pressure water onto the top, bottom, and both sides of the casting.
3 is a side view of a high-pressure water injection device according to an embodiment of the present invention.
4 and 5 are perspective views of the high-pressure water injection device according to the embodiment of the present invention and viewed from different angles, respectively.
6 shows an example of adjusting the angle of the jetting head of the high-pressure water jetting apparatus according to the embodiment of the present invention.
FIG. 7 shows a form of a straight jet opening of a high pressure water jetting jetting head according to an embodiment of the present invention and a water jetted from a spread jet opening.
8 shows an example of adjusting the position by moving the jetting headers of the high-pressure water jetting apparatus according to the embodiment of the present invention in the feeding direction of the main shaft.
9 shows an example of changing the injection condition by rotating the jet headers of the high-pressure water jet apparatus according to the embodiment of the present invention at a predetermined position.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs, and the present invention is not limited thereto, but may be embodied in other forms. In order to clarify the present invention, it is possible to omit the parts of the drawings that are not related to the description, and the size of the components may be slightly exaggerated to facilitate understanding.

1 shows a scarf apparatus to which a high-pressure water jet apparatus according to an embodiment of the present invention is applied. As shown in the figure, the scarifying apparatus 100 is configured such that the surface or corner of the cast piece 20 to be conveyed is conveyed in a state in which the casting 20 produced in a continuous casting process or the like is installed on a conveying line 10 Carry.

The scarping device 100 includes a plurality of scarping nozzles 110 and scarifying nozzles 110 scarcely disposed on the top, bottom, sides, and corners of the casting 20 to scarify the surface layer of the casting 20, A supporting unit 120 for supporting the scarifying nozzle 110 and a moving unit 130 for moving the supporting unit 120; an apparatus main body 140 for supporting the moving unit 130; Which collects and discharges the molten slag generated in the scouring process of the scraping process of the scraping process and discharges the high-pressure water to the molten slag flowing or scattering along the surface of the scraper, And a water injection device 200.

The collection chamber 150 may be installed to surround the front region of the scarfing nozzle 110 so as to collect the molten slag generated by the scaping operation of the casting 20. A discharge duct 151 for discharging steam generated when high pressure water is sprayed is provided in the upper part of the collecting chamber 150. A discharge passage 152 for discharging the collected slag and the flowing high pressure water is disposed in the lower part of the collecting chamber 150, May be provided.

2 to 5, the high-pressure water injection device 200 includes a spray header 210 for spraying high-pressure water to remove molten slag generated in the scooping process of the slab 20, 210 and a support unit 230 capable of adjusting the position and spray angle of the injection header 210.

As shown in FIG. 2, the high-pressure water injector 200 is provided with a plurality of molten slag on the top, bottom, and both sides of the casting 20 outside the conveying path of the casting 20, Can be distributed. 2 shows an arrangement of the high-pressure water injector 200 as an example, but the arrangement and the number of the high-pressure water injector 200 are not limited thereto.

3 to 5, the support unit 230 for supporting the jetting headers 210 is installed in the main body 20 in the conveying direction of the casting 20 in a state where one side of the supporting unit 230 is coupled to the machine body 140 of the scarifying apparatus 100, The first supporting portion 231 is attached to the first supporting portion 231 such that the first supporting portion 231 can move in the longitudinal direction of the first supporting portion 231 and in a direction intersecting the longitudinal direction of the first supporting portion 231 And a jet head supporting portion 233 coupled to the second support portion 232 to support the jet headers 210. [

The first support part 231 includes a first position adjustment hole 231a formed to be long in the longitudinal direction for mounting and adjusting the position of the second support part 232 and the second support part 232 includes a first support part 231, And a second position adjusting hole 232a formed to be long in the longitudinal direction (substantially vertical direction) for coupling and position adjustment. The second support portion 232 can be coupled to the first support portion 231 by fastening a plurality of fastening bolts 234 passing through the second position adjustment hole 232a and the first position adjustment hole 231a, The first and second positioning holes 231a and 232a can be fixed in a state of being moved in the feeding direction or the vertical direction of the cast piece 20. [

The jet head supporting portion 233 may be provided in a substantially flat plate shape and one of the jet head supporting portions 233 can be moved together with the second supporting portion 232 by being fixed to the second supporting portion 232. Therefore, the position of the jetting headers 210 mounted on the jetting head supporting portion 233 can be adjusted by the movement of the second supporting portions 232.

4, the supporting unit 230 includes a moving member 235 disposed on the back side of the jet head supporting portion 233 so as to be movable in the feeding direction of the main body, And a rotation support portion 236 for supporting the rotation shaft 210 in a rotatable and dispense angle adjustable manner.

The moving member 235 can move the screw shaft 235a provided in the jet head supporting portion 233 to move it finely in the feeding direction of the cast piece 20. This enables fine adjustment of the position of the injection header 210 by allowing the user to move the moving member 235 finely, as well as by adjusting the position of the second support part 232 by a large amount.

4 and 6, the rotation support portion 236 rotatably supports the neck portion 212 of the injection header 210 to adjust the spray angle θ of the injection header 210, The adjusting state of the spray angle? Can be maintained by tightening the plurality of tightening screws 236a provided on the movable member 235 after the adjustment.

3, 5, and 7, the jetting header 210 includes a conical body 211, a neck portion 211 extending from the body portion 211 and supported by the rotation support portion 236 of the support unit 230, (212) and the body part (211). The injection ports include straight jetting ports 213 and 214 for spraying a straight water stream in the direction crossing the conveying direction of the casting 20 to the surface of the casting 20 to remove molten slag flowing along the surface of the casting 20, And a diffusion jetting port (215, 216) for spraying a diffusion water stream in a direction crossing the conveying direction of the casting (20) to remove melted slag scattering.

The straight jetting port may be composed of a first straight jetting port 213 and a second straight jetting port 214 for jetting straight streams different in distance from the surface of the cast piece 20. The first straight jet opening 213 is disposed in such a manner that the lower end of the straight stream injected therefrom is in contact with the surface of the casting 20 so as to remove molten slag flowing along the surface of the casting 20, And the second rectilinearjection injection port 214 may be arranged such that the straight stream injected therefrom is relatively spaced from the surface of the slab 20 relative to the straight stream of the first straight injection port 213. [ 7 shows an example of a spray header 210 for spraying a water stream toward the upper surface of the cast piece 20. As shown in FIG. 2, the jetting heads 210 installed at different positions can be arranged in the same manner as the jetting directions are different.

The water of the first rectilinear jetting port 213 and the water of the second rectilinear jetting port 214 are located at a part of overlapping positions when viewed from the front of the conveying direction of the casting piece 20 as shown in Fig. This is because the two rectilinear streams form a relatively large water stream in the thickness direction or the width direction of the casting 20 so as to flow along the surface of the casting 20 in spite of the thickness direction displacement (vibration, etc.) So that the molten slag can be smoothly removed. That is, even if the position of the molten slag flowing through the surface of the slurry changes due to the vibration of the casting slab, the molten slag can be removed by a straight stream injected by any one of the first straight injection opening 213 and the second straight injection opening 214 . For example, when the main thread rises and the water stream injected from the first rectilinear jetting port 213 fails to function, the molten slag may be removed by the water stream injected from the second rectilinear jetting port 214 located at the upper portion thereof It is.

 The spread jet opening includes a first spread jet opening 215 and a second spread jet opening 216 for jetting a diffusion stream from the surface position of the casting 20 to the space separated from the first and second straight jetting portions 213 and 214, can do. The first and second spreading jetting openings 215 and 216 are made of molten slag scattering into a space separated from the surface of the casting 20 by allowing the spreading water stream to be sprayed to cover the outside region of the water streams of the first and second straight jetting openings 215 and 216 Can be removed.

The first and second spreading jetting openings 215 and 216 may be arranged to be spaced apart from each other and spray a partially overlapping diffusion water stream. A part of the diffusion water stream may overlap the straight water stream injected from the first and second straight jetting ports 213 and 214. [

As shown in FIGS. 3 and 7, the injection header 210 injects a plurality of straight water streams in a region where the first and second straight jetting ports 213 and 214 are close to the surface of the cast steel, Since the injection ports 215 and 216 inject the diffusion water stream to the region outside the straight water stream, the molten slag flowing along the surface of the slab 20 and the space are scattered in the space during the transportation of the slab 20, It is possible to smoothly remove the molten slag.

4 and 6, the jetting headers 210 can adjust the jetting angle? By operating the rotation support portion 236 of the support unit 230, and as shown in Fig. 8, The position of the second support portion 232 or the moving member 235 of the support unit 230 can be changed in the conveying direction of the cast piece 20. The distance between the sprayed water and the surface of the casting 20 can be adjusted by moving the second supporting part 232 attached to the first supporting part 231 of the supporting unit 230. Therefore, it is possible to easily change the shape and thickness of the cast steel 20 when it is necessary to adjust the spraying conditions.

Referring to Fig. 9, the jetting header 210 is rotatably mounted on the rotation support portion 236 of the support unit 230. As shown in Fig. Therefore, it is possible to change the injection condition without changing the position or angle of the injection header 210. [ That is, the positions of the first and second straight jetting ports 213 and 214 can be finely adjusted by rotating the jetting header 210 in place around the axis of the jetting header 210. The first straight jetting port 213 and the second straight jetting port 214 provided in the jetting header 210 are spaced apart from each other at a position eccentric from the rotational center of the jetting header 210.

When the positions of the first and second straight jetting ports 213 and 214 are adjusted by rotating the jetting header 210 so that the straight stream injected from the first and second jetting ports 213 and 214 is equal in height to the surface of the casting 20 Or at different heights. In other words, the injection position and the spray width of the straight water stream can be easily adjusted in this manner.

10: transfer line, 20: cast,
100: scarping device, 110: scarping nozzle,
150: collection chamber, 200: high-pressure water injection device,
210: jetting header, 213: first straight jetting port,
214: second straight jet opening, 215: first spread jet opening,
216: second spread jet opening, 230: supporting unit,
231: first support portion, 232: second support portion,
233: jet head supporting portion, 235: moving member,
236: rotation support.

Claims (8)

A spray header for spraying high-pressure water to remove molten slag generated in the scaping process of the main body, and a support unit for supporting the spray headers,
Wherein the jetting header comprises:
A straight jet opening for spraying a straight water stream to the surface of the cast steel to remove molten slag flowing along the surface of the cast steel,
And a diffusion jetting port for jetting a diffusion water stream into a space separated from the surface of the cast steel to remove molten slag scattering. The method according to claim 1,
Wherein the straight jetting port includes a first straight jetting port and a second straight jetting port for jetting straight water streams having mutually different distances from the surface of the cast steel. 3. The method of claim 2,
Wherein the jetting header is rotatably supported on the support unit,
Wherein the first straight jetting port and the second straight jetting port are spaced apart from each other in a rotation direction of the jetting header at a position eccentric from the rotation center of the jetting header. The method according to claim 1,
Wherein the diffusion jetting ports include a first diffusion jetting port and a second diffusion jetting port for jetting a diffusion water stream in a state where the spread jetting ports are spaced apart from each other. 5. The method according to any one of claims 1 to 4,
The support unit
A first support portion extending in the feeding direction of the casting in a fixed state;
A second support portion mounted on the first support portion so as to be movable in a longitudinal direction of the first support portion and in a direction intersecting with the first support portion; And
And a spray header supporting part coupled to the second support part to support the spray headers. 6. The method of claim 5,
The support unit
A moving member provided movably in the feeding direction of the cast strip on the jet head supporting portion,
Further comprising a rotation support portion provided on the moving member for supporting the injection header so as to be adjustable in rotation and spray angle. The method according to claim 6,
Wherein the moving member is moved in the feeding direction of the casting by the rotation of a screw shaft provided on the jetting head supporting portion. A jet head having a plurality of jet openings for jetting high-pressure water to remove molten slag generated in the scarfing process of the main body; and a support unit for rotatably supporting the jet headers,
Wherein the plurality of ejection openings are spaced apart from each other in a rotation direction of the ejection header at a position eccentric from a rotation center of the ejection header.

KR1020150167071A 2015-11-27 2015-11-27 Water-jet device of scarfing apparatus KR101756205B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109248996A (en) * 2017-07-13 2019-01-22 鞍钢股份有限公司 A kind of continuous casting steel billet burr interleaving agent and burr minimizing technology
KR102357103B1 (en) * 2020-09-25 2022-02-07 현대제철 주식회사 Substrate descaler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102288410B1 (en) * 2018-11-14 2021-08-10 주식회사 포스코 Scarfing apparatus and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109248996A (en) * 2017-07-13 2019-01-22 鞍钢股份有限公司 A kind of continuous casting steel billet burr interleaving agent and burr minimizing technology
CN109248996B (en) * 2017-07-13 2020-05-29 鞍钢股份有限公司 Continuous casting billet burr separant and burr removing method
KR102357103B1 (en) * 2020-09-25 2022-02-07 현대제철 주식회사 Substrate descaler

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