KR20000010618U - Horizontal descaling device - Google Patents

Abstract

The present invention relates to a descaling apparatus for removing the scale generated on the surface of the bar surface during hot rolling. More specifically, the header for injecting the high pressure water is moved left and right to uniform the temperature distribution of the bar in the width direction. The present invention relates to a left and right movable descaling apparatus which is improved to prevent shape defects.

The present invention is a descaling apparatus for removing the scale by spraying high pressure water on the upper and lower surfaces of the bar (6), the steel pipe 12 having a plurality of nozzles 11 and the inlet 13 on one side of the outer surface A header 10 having integrally formed perforated cylinders 14 and a first guide hole 23 assembled to slide the movable block 21 mounted on one side outer circumferential surface of the steel pipe 12; The first support 22 and the cylindrical body 14 is inserted through the second guide hole 24 is formed, and the discharge port 29 is formed to communicate with the inlet 13 to form a high-pressure water inlet pipe 107 and A second support 24 connected to support the header 10, and a reciprocating mechanism 30a coupled to the connector 19 formed at one end of the cylindrical body 14. It provides a left and right movable descaling apparatus including a; moving portion 30 for moving the header 10 in the width direction of the bar (6).

Description

Horizontal descaling device

The present invention relates to a descaling apparatus for removing the scale generated on the surface of the bar surface during hot rolling. More specifically, the header for injecting the high pressure water is moved left and right to uniform the temperature distribution of the bar in the width direction. The present invention relates to a left and right movable descaling apparatus which is improved to prevent shape defects.

In general, since hot rolling is performed at a high temperature, it is easy to generate scale on the surface of the manufactured bar. Since the scale causes product defects, descaling to remove the scale is essential for the hot rolling process.

As shown in FIGS. 1 and 2, the descaling apparatus 100 for removing scales generated on the upper and lower surfaces of the bar 6 includes a header in which the nozzles 101 are assembled at regular intervals on the steel pipe 110. And a support 130 supporting the same, wherein the header 120 has a predetermined distance so as to spray the high pressure water 104 from the upper and lower portions of the bar 6 to the surface. Welding)

One side of the header 110 is connected to the high-pressure water inlet pipe 170, the high-pressure water 104 introduced through the pipe 170 is injected through the nozzle 101 of the header 110, The injected high pressure water 104 collides with the upper and lower surfaces of the bar 6 to remove the scale of the surface of the bar 6 by the collision force.

Meanwhile, as shown in FIGS. 2 and 3, the collision surface 8 of the high pressure water 104 injected from the nozzle 101 and the bar 6 is adjacent to each other at a predetermined angle in the width direction of the bar 6. Since it overlaps the collision surface 8 of the high pressure water sprayed from the nozzle 101, as a plurality of overlaps 9 are formed in the longitudinal direction of the bar 6, it is scaled by the high pressure water 104 sprayed. The bar 6 to be removed is not uniformly cooled and a temperature deviation occurs.

That is, the overlap 9 portion in which the injected high pressure water 104 overlaps is supercooled than the portion in which the high pressure water 104 does not overlap, and the deformation resistance of the overlap portion of the super cooled bar 9 increases. Therefore, when the bar 6 is rolled as the rolling rolls 5a and 5b, the rolling rolls 5a and 5b in the parts in contact with the parts with the large deformation resistance are more likely to wear than the uncooled bar parts. As a result, abrasion of the rolling rolls 5a and 5b occurs unevenly.

Then, as the number of rolls increases, the degree of uneven wear of the rolling rolls 5a and 5b increases, and the bar 6 is made of upper and lower rolling rolls 5a and 5b with such uneven wear. When rolling, there is a problem that the wear shape of the roll surface is transferred to the rolled steel plate 7 surface to cause a shape defect of the hot rolled coil (7).

Accordingly, in the case of the cold rolled material, if the surface shape of the rolled steel sheet is poor, a build-up defect that rises locally occurs in the hot rolled coil wound thereon, thereby maintaining such non-uniformity within a predetermined standard. For this reason, the number of rolls per roll is limited.

Therefore, the present invention is to solve such a conventional problem, and its purpose is to move the header for spraying the high pressure water to the bar surface from side to side during the descaling operation to remove the scale, so that the overlap portion of the bar surface is dispersed. By preventing local subcooling to prevent non-uniform wear of the rolling roll passing through the bar, and to increase the number of rolls roll per unit to provide a left and right movable descale device that can improve the work productivity.

1 is a longitudinal sectional view showing a working state of a descaling apparatus according to the prior art;

Figure 2 is a perspective view showing a working state of the descale device according to the prior art,

Figure 3 is a schematic diagram showing the temperature of the bar, deformation resistance distribution and rolling roll, steel plate wear shape according to the use of the descaling apparatus according to the prior art,

Figure 4 is a perspective view showing a left and right movable descale device according to the present invention,

5 is an exploded perspective view showing the header and the support of the left and right movable descale apparatus according to the present invention,

Figure 6 is an exploded perspective view showing a left and right movable descale device according to the present invention,

7 is a perspective view showing the header of the left and right movable descale apparatus according to the present invention,

8 is a connection state of the header and the moving portion of the left and right movable descale apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

10 ...... Header 11 ...... Nozzle

12 ...... Steel Pipe 13 ...... Inlet

14 ...... Cylindrical 21 ...... Moving Block

22 ...... 1st support 23 ...... 1st guide

24 ...... 2nd support 26 ...... 2nd guide

29 ...... Discharge port 30a ..... Reciprocating mechanism

31 ...... rotation axis 32 ...... reduction gear

33 ...... Drive Motor 34 ...... PG

The present invention as a technical configuration for achieving the above object,

In the descaling apparatus for removing the scale by spraying high pressure water on the upper and lower surfaces of the bar,

A header comprising a steel pipe having a plurality of nozzles formed therein and a cylindrical body boring an inlet on one side of the outer surface;

High pressure by forming a discharge port communicating with the inlet through the first support through which the first guide hole is formed to assemble the sliding block mounted on one side outer peripheral surface of the steel pipe and the second guide hole into which the cylindrical body is inserted; A support part for supporting the header, comprising a second support part connected to a male inlet pipe;

By having a reciprocating mechanism coupled to the connector formed on one end of the cylindrical body to move the header to the left and right reciprocating in the width direction of the bar; and the left and right movable descaling device comprising a.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is an overall perspective view showing a left and right movable descale apparatus according to the present invention, Figure 5 is an exploded perspective view showing the header and the support of the left and right movable descale apparatus according to the present invention, Figure 6 is a left and right according to the present invention 7 is an exploded perspective view illustrating a mobile descale device, and FIG. 7 is a perspective view illustrating a header of a left and right descaling device according to the present invention, and FIG. 8 is a diagram illustrating a connection state of a header and a moving part of the left and right moving descale device according to the present invention. to be.

The left and right movable descaling apparatus 1 according to the present invention is a header 10 made of high-pressure water spray to remove the scale attached to the upper and lower surfaces of the bar 6, which proceeds in one direction, as shown in FIGS. ), A support part 20 for supporting the same, and a moving part 30 for reciprocating the header 11 in the width direction of the bar 6. The descaling apparatus 1 installed on the upper side will be described as the upper and lower sides of the same structure are installed in the same structure.

The header 10 is in communication with the high-pressure water inlet pipe 107 into which the hollow tube cylindrical steel pipe 12 is installed so that the plurality of nozzles 11 face the surface of the bar 6 in one direction. The hollow body cylindrical body 14 formed by drilling the inlet 13 on the outer circumferential surface so that the high-pressure water is introduced into the longitudinal direction, and the other side pipe and the cylindrical body 14 of the steel pipe 12 whose one end is sealed. One end of the c) is connected to each other so that the high pressure water introduced from the inlet 13 is injected to the bar 6 through the nozzle 11.

And, the support portion 20 for supporting the header 10 as described above in the width direction of the bar 6 at the predetermined height of the bar, the left and right ends of the header 10 are respectively supported on the left and right sides of the bar 6 The first and second supports 22 and 24 are configured to be provided, and the first support 22 is assembled such that the movable block 21 fixed to the outer circumferential surface of the steel pipe 12 of the header 10 slides. Injecting and discharging the lubricating oil is formed to penetrate the first guide hole 23, the left and right movement of the movable block 21 assembled in the first guide hole 23, and the injected lubricating oil is discharged Lines 23a and 23b and piping members 25a and 25b connected thereto are provided respectively. At this time, the moving block 21 is configured of a rectangular parallelepiped so as to prevent the header 10 from twisting when the rotational movement of the drive motor 33 by the reciprocating mechanism 30a to be described later to linear movement. In addition, it is preferable to form the first guide hole 23 to which the moving block 21 is assembled in a square hole shape.

The second support member 24 is formed to penetrate through the second guide hole 26 to be assembled so that the cylindrical body 14 of the header 10 slides, and the left and right movement of the cylindrical body 14 is made smooth. It is equipped with a lubricating oil injection line (27b) and the piping member (27a) for injecting lubricating oil, and discharges the lubricating oil injected through the lubricating oil discharge line and the piping member not shown. In addition, the inner circumferential surface of the second guide hole 26 penetrating the same cylindrical shape as the cylindrical body 14 has the second guide hole (regardless of the left and right flow widths of the header 10 by the reciprocating mechanism 30a described later) The discharge port 29 is always in communication with the inlet port 13 so as to supply the high pressure water while staying in the container 26, and the discharge port 29 is connected to the high pressure water inlet pipe 107.

Here, since the water used for the descaling operation is injected at a high pressure, the sealing for preventing leakage between the outer circumferential surface of the cylindrical body 14 and the inner circumferential surface of the second guide hole 26 is very important, the inlet 13 Space rings 28a are respectively inserted into the left and right outer peripheral surfaces of the c), and guide rings 28b made of metal are respectively inserted at both sides thereof, and the rubber packing 22c is disposed between the space rings 28a and the guide rings 28b. Insert each of the to prevent leakage of high pressure water into the gap between the cylindrical body 14 and the second guide hole (26).

Then, the moving part 30 for moving the header 10 assembled in the first and second support 22 and 24 to move left and right in the width direction of the bar 6 is one end of the cylindrical body 14. It is equipped with a reciprocating mechanism (30a) is screwed with the male screw portion (19a) of the connector (19) formed in the to convert the rotational movement to orthogonal reciprocating movement. The reciprocating mechanism 30a includes a reduction gear 32 having a rotation shaft 31 formed on an inner circumferential surface of the female thread portion 31a screwed into the male screw portion 19a, and a drive motor for rotating the reduction gear 32. 33). The reciprocating mechanism 30a may use a reciprocating mechanism such as a cylinder to repeatedly reciprocate the header 10.

Accordingly, the power transmitted from the driving motor 33 rotates the rotary shaft 31 coupled to the female threaded portion 19a of the connector 19 via the speed reducer 32 and rotates in the forward direction. The header 10 is linearly moved to the left in the drawing by the rotating shaft 31 of the shaft, and the header 10 is to the right in the drawing as opposed to the above by the rotating shaft 31 of the speed reducer 32 rotated in the reverse direction. Since the linear return movement can be performed, the drive motor 33 is periodically repeated in the forward and reverse directions to reciprocate the header 10 in the width direction of the bar 6 from the first and second supports 22 and 24. It is mobile.

Then, the forward and reverse cycles and the driving time of the driving motor 33 driven by receiving an operation signal from a direct digital controller (DDC) of the header 10 to reciprocate through the reciprocating mechanism (30a) Plge 34 is connected to the drive motor 33 to detect the left and right movement distance and position, dust or water is rotated on the outer peripheral surface of the connector 19 that can be inserted into the female screw portion (31a) It is preferable to mount the sealing member 35 to prevent the flow into the female screw portion (31a).

Referring to the operation and effect of the left and right movable descale device having the configuration as described above are as follows.

First, when the bar 6 enters between the descaling apparatuses 1 installed in the upper and lower limits on the upper and lower sides of the line through which the roll-casting bar 6 proceeds, the front of the apparatus 1 is located. A non-illustrated hot metal detector (HMD) detects the line unit value of the bar 6 and transmits it to the DDC. Upon receiving the position detection signal, the DDC calculates the left and right movement time of the header 10 by sending the table value received from the host computer and the position of the tip of the bar 6 to the mathematical model. On the basis of this calculation result, if a signal for operating the drive motor 33 of the reciprocating mechanism 30a is transmitted, the drive motor 33 is repeatedly driven in the forward and reverse directions according to the calculated and set calculation value. The rotational force is transmitted to the rotational shaft 31 of the reduction gear 32 connected to the drive motor 33, and the rotational force is connected to the screwing of the male threaded portion 19a of the connector 19 and the female threaded portion 31a of the rotary shaft 31. The header 10 is assembled into a linear reciprocating motion so as to slide in the first and second guide holes 23 and 26 of the first and second supports 22 and 24, so that the bar 10 Reciprocate in the width direction of 6).

At this time, the left and right moving speed of the header 10 is determined by a table value, the left and right reciprocating distance is the overlap (9) portion on the surface of the bar (6) generated by overlapping the nozzles 11 of the steel pipe 12 They are set equal to the pitch (P) distance between the nozzles 11 arranged at regular intervals so that they are formed in a non-linear waveform as in the prior art, and the position and the movement distance are calculated by the DDC by receiving a signal from the PGE 34. Done.

On the other hand, the high-pressure water supplied through the high-pressure import inlet pipe 107 by the opening operation of the valve not shown at the same time as the left and right reciprocating movement of the header through the inlet port 13 of the discharge port 29, the cylindrical body 14 The high-pressure water introduced into the sieve 14 is injected to the surface of the bar through each nozzle 11 of the steel pipe 12 to remove the scale, which is sprayed from the adjacent nozzle 11. The portion of the overlap (9) generated on the surface of the bar (6) by the injection angle of the high-pressure water 104 is evenly distributed in a wave form by the periodic reciprocating movement of the header (11) to the surface of the local bar (9) By preventing the subcooling to evenly distribute the temperature and strain resistance distribution, it is possible to prevent the rolling roll 5, which rolls the bar 6 from which the scale is removed through the apparatus 1, from being worn unevenly.

Then, when the end of the bar is detected by another HMD (not shown) located behind the apparatus 1, the high pressure water is injected into the header 10 until a stop command is issued to the drive motor 33 at the DDC. The reciprocating motion of the nozzle 11 is reciprocated by the distance P, and the reciprocating motion of the header 10 is stopped by receiving a stop command.

According to the present invention as described above, the header of the device (1) disposed above and below, respectively, while the bar (6) is advanced to remove the scale attached to the surface before passing through the rolling roll (5) 10 is reciprocated in the width direction of the bar 9 to distribute the portion of the overlap 9 generated by the high pressure water 104 sprayed from the nozzle 11 evenly on the surface of the bar 6, thereby providing a bar 9 It is possible to prevent the local overcooling of) and to evenly distribute the temperature and strain resistance distribution on the bar surface, thereby preventing uneven wear of the rolling roll 9 due to uneven cooling of the bar 6 as in the prior art. The practical effect of preventing a shape defect of the manufactured rolling coil and obtaining an excellent product is acquired.

Claims (3)

In the descaling apparatus for removing the scale by spraying high pressure water on the upper and lower surfaces of the bar (6), A header 10 having a plurality of nozzles 11 formed therein and a cylindrical body 14 having the inlet 13 perforated on one side of an outer surface thereof; The first guide 22 and the cylindrical guide 14 into which the first guide hole 23 is assembled so that the movable block 21 mounted on one side outer peripheral surface of the steel pipe 12 slides. The second support 24 is formed through the ball 26 and forms a discharge port 29 communicating with the inlet 13 so as to be connected to the high-pressure water inlet pipe 107 to support the header 10. Support 20; A moving part 30 having a reciprocating mechanism 30a coupled to a connector 19 formed at one end of the cylindrical body 14 to move the header 10 left and right in the width direction of the bar 6; Left and right movable descaling apparatus characterized in that. The rectangular parallelepiped type according to claim 1, wherein the movable block 21 is configured to prevent the header 10 from twisting when the rotational movement of the drive motor 33 by the reciprocating mechanism 30a is converted into linear movement. The descaling apparatus of the left and right movable type, characterized in that the first guide hole (23) is assembled in the form of a square hole. According to claim 1, wherein the left and right reciprocating movement distance of the header 10 is a constant so that the overlap (9) portions on the surface of the bar (6) is generated by overlapping the nozzles 11 of the steel pipe 12 is formed in a waveform. Left and right movable descaling apparatus, characterized in that it is set equal to the pitch (P) distance between the nozzles 11 arranged at intervals.