KR101330297B1 - Apparatus for controlling horizontal injection unit in scarfing machine - Google Patents

Abstract

The lower horizontal high pressure water injection unit controller for the scarfing machine is introduced to protect the installation from height-adjustable and flying scales.
The lower horizontal high-pressure water injection unit control device for the scarfing machine of the present invention, the central sensor 12 for detecting the bending degree of the center of the slab (S) and the head sensor 14 for detecting the bending degree of the head of the slab (S). Sensor unit 10 including; Lower horizontal high pressure water injection unit 20 is disposed on one side of the slab (S) to be transported to inject the high pressure water to the lower side of the slab (S) while the height is adjusted according to the bending degree of the slab (S) ; A driving unit 90 for providing power so that the lower horizontal high pressure water injection unit 20 can be height-adjusted; Receiving the bending information of the slab (S) from the sensor unit 10, the control unit 30 for controlling the height of the lower horizontal high-pressure water injection unit 20 based on this.

Description

Bottom horizontal high pressure water injection unit controller for scarfing machine {APPARATUS FOR CONTROLLING HORIZONTAL INJECTION UNIT IN SCARFING MACHINE}

The present invention relates to a lower horizontal high-pressure water injection unit control device for a scarfing machine used for descaling in the scarfing process, and more particularly, the precise position of the slab by adjusting the height according to the degree of deformation of the bent slab The lower horizontal high-pressure water injection unit control device for the scarfing machine, which can be sprayed with high-pressure water at the same time, to protect the surrounding equipment from the scattering scale.

Generally, continuous casting equipment is for manufacturing molten steel into semi-finished products, such as cast steel, and is mainly composed of a tundish, a mold, and a plurality of player rolls, and after the molten steel passes through the mold to form a solidified layer, When passed between multiple player rolls, it has a manufacturing fixture that cools the surface of the cast piece by spraying coolant.

In the production of cast steel by the conventional continuous casting method, it is very important to control the surface temperature of the cast steel. In the machine, the cast steel undergoes bending and straightening during casting. Is applied. Thus, when surface defects generate | occur | produce in a cast steel, productivity of a performance operation will fall, and, in severe cases, a cast steel cannot be used.

Slabs produced through this process inevitably generate surface defects according to their composition and production conditions.To remove these surface defects and improve the quality of the product, the slabs have been scarfed using a scarfing machine before final shipment. Later, hot rolled or cold rolled coil products are produced.

The scarfing process means a surface treatment process in which defects occurring on the surface of the slab are removed by melting the surface using high pressure oxygen and gas.

Generally, a scarfing machine that performs the scarfing process is provided with utilities such as high pressure oxygen, gas, nitrogen, air, high pressure water, low pressure water and circulating water, and the scarfing operation is used for the flame reaction of oxygen and gas. The slab surface is heated, melted and oxidized by a high pressure air and then sprayed with a high pressure air.

As shown in FIG. 1, according to the conventional scarfing machine, a horizontal spray unit 7 is provided on the side of the slab S conveying path which is transported by the feed roll 1 and the pinch roll 3, and the slab. On the conveyance path, the vertical injection part 5 which injects high pressure water on the upper surface of the slab part is provided.

The vertical injection unit 5 and the horizontal injection unit 7 is to remove the scale of the surface of the slab (S) by spraying high-pressure water in the vertical and horizontal directions, respectively, when the slab (S) transfer, horizontal injection unit (7) ), Because it is fixed to the scarfing machine body, the horizontal height of the high pressure water is always fixed, and when the slab S is bent, of course, the scale of the surface of the slab S cannot be removed. There was a problem of scattering the scale when spraying high pressure water.

In general, the slab (S) to which the scarfing code is assigned is scattered on the yard to perform the scarfing operation according to the delivery order or the elapsed date, and the bending is generated on the slab (S) in the state of being deposited on the yard. When the slab (S) is put into the scarfing process, even if the high-pressure water is injected from the horizontal injection portion 7 of a fixed height can not be normally sprayed on the surface of the slab.

On the other hand, Korean Utility Model Registration No. 3002683 discloses a molten metal strip removal apparatus.

The present invention relates to a device for removing molten debris when a scarfing process is performed to remove surface defects of a cast produced in a continuous steelmaking process. The high pressure water is sprayed to remove such molten debris, and It relates to a device that can automatically adjust the injection position according to the width.

Korean Utility Model Publication No. 1999-0025746 discloses a "scarping molten snow removal apparatus".

The present invention relates to a device for removing molten snow generated on a slab head surface during a scarfing operation, and relates to a device for spraying high pressure water using dozens of nozzles targeting a molten snow generating portion of a slab head.

Various patterns that can inject high pressure water among the scarfing devices used in the scarfing process have been researched and developed. However, despite the research and development, the high pressure water is precisely applied to the bent slab positioned on the side of the bent slab. At the same time, the problem of protecting the installation from scattering scale remains a challenge.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as adhering to the prior art already known to those skilled in the art.

Korean Utility Model Registration No.0302683 Korean Utility Model Model 1999-0025746

It is an object of the present invention to provide a lower horizontal high-pressure water injection unit control device for a scarfing machine, which is height-adjustable and protects the installation from scattered strays to solve this conventional problem.

The lower horizontal high-pressure water injection unit control apparatus for the scarfing machine according to the present invention for achieving this object, the lower horizontal high-pressure water injection unit control apparatus for the scarfing machine, the center for sensing the bending degree of the center of the slab (S) A sensor unit including a sensor and a head sensor for sensing a bending degree of the slab head unit; A lower horizontal high pressure water injection unit positioned on one side of the slab to be transported and spraying the high pressure water on the lower side of the slab while the height thereof is adjusted according to the bending degree of the slab; A driving unit providing power so that the lower horizontal high pressure water injection unit can be height-adjusted; And a controller configured to receive bending information of the slab from the sensor unit and control the height of the lower horizontal high pressure water injection unit based on the bending information of the slab.

The lower horizontal high pressure water injection unit may include a lower horizontal high pressure water nozzle for injecting high pressure water in a horizontal direction from the side of the slab, a support plate on which the lower horizontal high pressure water nozzle is mounted and supported, and one end of the support plate The other end is fixed to the ground, characterized in that it comprises a position sensing cylinder which is compressed or expanded by the control unit.

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A first protection plate fixed to the ground to protect the position sensing cylinder from the scattered scale and concealing one side of the position sensing cylinder, and spaced apart at a predetermined interval in the direction of the primary protection plate and the slab transport path And conceal one side of the position sensing cylinder, but the upper end of the second protective plate fixed to one side of the support plate, and the upper portion at a predetermined interval so as to be able to move up and down when the position sensing cylinder is elevated Located in the nozzle protection plate connected via the support plate and the bracket, characterized in that it further comprises a side protection plate coupled to one side of the upper surface of the support plate.

 The control unit stores the distance between the slabs without bending deformation in the sensor unit as a reference value, receives the actual distance with the slab measured by the sensor unit as a detection value, and determines whether the slab is in a downward shape according to the following formula. If it is determined that the slab has a lower shape, the position sensing cylinder is raised, and if the slab is characterized in that the position sensing cylinder is lowered.

Bending Amount = Reference Value-Detected Value + Slab Thickness

The present invention has the advantage that even if the bending deformation occurs in the slab due to the technical configuration, by spraying high-pressure water to the exact point of the slab passing through the scarfing machine to completely remove the scale.

In addition, by preventing the scattering scale from binding to the driving unit, there is an advantage that can prevent equipment failure such as the driving unit.

1 is a view showing a conventional scarfing machine,
2 is a view showing a sensor unit which is an essential part of the present invention;
3 is a view showing a lower horizontal high-pressure water injection unit, a driving unit and a control unit which are the main parts of the present invention;
Figure 4 is a side view of the lower horizontal high-pressure water injection unit control device for the scarfing machine of the present invention,
5 is a view showing the operational flow of the present invention.

Hereinafter, with reference to the accompanying drawings will be described a lower horizontal high-pressure water injection unit control device for a scarfing machine according to an embodiment of the present invention.

As shown in Figures 2 and 3, the lower horizontal high-pressure water injection unit control device for the scarfing machine of the present invention, the sensor unit 10, the lower horizontal high-pressure water injection unit 20, the drive unit and the control unit 30 It includes.

The sensor unit 10 functions to sense the bending degree of the slab S, and provides the controller 30 with information about the distance to the slab S, the width, the thickness, the length of the slab S, and the like.

The lower horizontal high pressure water injection unit 20 is installed at one side of the slab to be transferred. The lower horizontal high pressure water injection unit 20 has high pressure water at the lower side of the slab while its height is adjusted according to the bending degree of the slab. Spray it.

The driving unit transmits power to the lower horizontal high pressure water injection unit 20, so that the lower horizontal high pressure water injection unit 20 can be elevated.

The control unit 30 receives the slab S information from the sensor unit 10 to determine whether the slab S is bent, and furthermore, whether the bending direction is downward (concave bottom) or upward shape ( The bottom surface is convex) also determines whether the driving unit is elevated.

The sensor unit 10 preferably includes a central sensor 12 and a head sensor 14.

The central sensor 12 senses the center portion of the slab S and provides the information to the controller 30, and the head sensor 14 senses the head of the slab S and provides the information to the controller 30. The central sensor 12 and the head sensor 14 may use various types of sensors such as a laser sensor. In addition, the sensor unit 10 may also include a tail sensor for sensing the tail of the slab (S), since the bending degree of the head of the slab (S) and the tail portion is symmetrical with respect to the center thereof, the tail sensor is a slab ( S) It is preferable to install only when it is necessary to know the bending degree of the tail portion in detail.

The lower horizontal high pressure water injection unit 20 preferably includes a lower horizontal high pressure water injection nozzle 22, a support plate 24, and a position sensing cylinder 26.

The lower horizontal high pressure water jet nozzle 22 removes the scale by spraying the high pressure water in the horizontal direction on the lower side of the slab (S). The lower horizontal high pressure jet nozzle 22 is seated and fixed to the support plate 24.

The position sensing cylinder 26 has an upper end fixed to the bottom of the support plate 24 and the lower end fixed to the ground. Preferably, the lower end is fixed by using a link and a pin to facilitate repair or replacement work.

The position sensing cylinder 26 receives the signal from the control unit 30, compresses and expands, and lifts the support plate 24, and the lower horizontal high pressure water injection nozzle 22 also moves up and down by the support plate 24. Ascend and descend.

On the other hand, when the high-pressure water is injected from the lower horizontal high-pressure water injection unit 20, the scale of the surface of the slab (S) is scattered, but if the scattered scale is bound to the position sensing cylinder 26, etc., the cause of the position sensing cylinder 26 failure Becomes

As shown in Figures 3 and 4, in order to protect the equipment such as the position sensing cylinder 26 from the scattered scale, the lower horizontal high-pressure water injection unit control device for the scarfing machine of the present invention, the primary protection It is preferable to include the plate 40, the secondary protection plate 50, the nozzle protection plate 60 and the side protection plate 70.

The lower end of the primary protective plate 40 is fixed to the ground to conceal and isolate the position sensing cylinder 26 from the scarfing machine. The second protection plate 50 is located between the first protection plate 40 and the slab (S) transfer path, the lower end of the second protection plate 50 is spaced apart from the ground by a predetermined distance, The upper end is fixed to one side of the support plate 24 so that the position sensing cylinder 26 is not exposed to the slab (S) transfer path even when the position sensing cylinder 26 is expanded.

In addition, the nozzle protection plate 60 is located between the upper horizontal high-pressure water injection nozzle and the lower horizontal water injection nozzle, the lower end of the support plate 24 through the bracket so as to interlock when the position sensing cylinder 26 is elevated. Is connected to the top of the.

The side protection plate 70 is coupled to one side of the upper surface of the support plate 24 to prevent the scale from scattering in the lateral direction of the position sensing cylinder 26 and binding.

4 and 5, the control unit 30 of the lower horizontal high-pressure water injection unit control device for the scarfing machine of the present invention, the distance between the slab (S) without bending deformation in the sensor unit 10. Stored as a reference value, and receives the actual distance to the slab S measured by the sensor unit 10 as a detection value to determine whether the slab (S) is a downward shape or an upward shape by the following formula, the slab (S) In the case of having a downward shape, it is preferable to raise the position sensing cylinder 26 and to lower the position sensing cylinder 26 in the upward shape.

Bending Amount = Reference Value-Detected Value + Slab Thickness

When the bending amount is calculated and the value is (+), the slab S is bent in the downward shape, and if the value is (-), the slab S is bent in the upward shape. In this case, the control unit 30 expands the position sensing cylinder 26 to raise the lower horizontal high-pressure water injection nozzle 22, and when bent upward, the control unit 30 compresses the position sensing cylinder 26. Lower the lower horizontal high pressure jet nozzle 22.

These bending values may be different in the center, head and tail of the slab S, but by adjusting the spray angle of the lower horizontal high pressure jet nozzle 22 within a certain range, the scale can be completely removed. Can be.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: sensor unit 12: central sensor
14: head sensor 20: lower horizontal high pressure water injection unit
22: lower horizontal high pressure jet nozzle
24: support plate 26: position detection cylinder
30 control unit 40 primary protective plate
50: secondary protection plate 60: nozzle protection plate
70: side protection plate

Claims (5)

A sensor unit 10 including a central sensor 12 detecting a bending degree of a center portion of the slab S and a head sensor 14 detecting a bending degree of the head portion of the slab S;
Lower horizontal high pressure water injection unit 20 is disposed on one side of the slab (S) to be transported to inject the high pressure water to the lower side of the slab (S) while the height is adjusted according to the bending degree of the slab (S) ;
A driving unit 90 for providing power so that the lower horizontal high pressure water injection unit 20 can be height-adjusted;
Receiving the bending information of the slab (S) from the sensor unit 10, the control unit 30 for controlling the height of the lower horizontal high-pressure water injection unit 20 based on this; including, for the scarfing machine Lower horizontal high pressure water injection unit controller.
delete The method of claim 1, wherein the lower horizontal high pressure water injection unit 20,
A lower horizontal high pressure water jet nozzle 22 for spraying high pressure water in a horizontal direction from the side of the slab S, a support plate 24 on which the lower horizontal high pressure jet nozzle 22 is seated and supported, and one end It is fixed to the support plate 24 and the other end is fixed to the ground, characterized in that it comprises a position sensing cylinder 26 is compressed or expanded by the control unit 30, the lower horizontal high-pressure water injection unit for the scarfing machine Control unit.
The method according to claim 3,
A first protection plate 40 fixed to the ground so as to protect the position sensing cylinder 26 from the scale being scattered, and concealing one side of the position sensing cylinder 26, and the first protection Plate 40 and the slab transfer path spaced at a predetermined interval to conceal one side of the position sensing cylinder 26, the upper end of the support plate 24 so as to move in conjunction with the position sensing cylinder 26 ascend Secondary protection plate 50 fixed to one side of the, and the support plate 24 and the nozzle protection plate which is located on the upper portion at a predetermined interval and connected via the support plate 24 and the bracket (B) ( 60) and a side protection plate (70) coupled to one side of the upper surface of the support plate (24), the lower horizontal high pressure water injection unit control device for the scarfing machine.
The method according to claim 3, The control unit 30,
The sensor unit 10 stores the distance between the slabs without bending deformation as a reference value, receives the actual distance from the slab S measured by the sensor unit 10 as a detection value, and the slab ( It is determined whether S) is a downward shape or an upward shape, and when the slab S is a downward shape, the position sensing cylinder 26 is raised, and when the slab S is a downward shape, the position sensing cylinder 26 is lowered. Characterized in that, the lower horizontal high-pressure water injection unit control device for the scarfing machine.

Bending Amount = Reference Value-Detected Value + Slab Thickness

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