KR20180097696A - Apparatus and method for cleaning a body having a surface layer to be removed. - Google Patents

Abstract

The present invention relates to a cleaning device, and more particularly to a cleaning device which comprises a warm rolled product (2) moving in translation relative to the direction of movement of the device, in particular slabs or strips, At least one nozzle holder 4 rotatably mounted on a central bearing 5 which is perpendicular or inclined with respect to the surface of the rolled product to be treated, Jet nozzle 4 in which a pressurized liquid is injected during operation and the jet nozzle 4 is configured such that a fluid jet ejected from the jet nozzle 4 during operation is applied linearly to the surface of the rolled material Wherein at least one jet nozzle 4 is oriented on the nozzle holder 3 about an axis of rotation oriented parallel to the central bearing 5 of the nozzle holder 3 To rotate During operation, the jet nozzle (4) is rotationally driven in such a manner that the angle between the direction of movement of the rolled material and the orientation of the fluid jet ejected from the jet nozzle (4) is maintained in the plane of the surface of the rolled material A rotary shaft having a supply line 13 embedded in the rotary shaft for the pressurized liquid is connected to the central bearing 5 connected to the supply line 14 in the respective arms 31, 32 of the nozzle holder 3, And the feed line 14 is opened into the feed opening 43 of the nozzle housing 41 of the jet nozzle 4 and is ejected from the jet nozzle 4 of the pressurized fluid jet between 80 and 1000 bar Direction does not have a component in the moving direction of the rolled material 2. [ In addition, a cleaning method is disclosed.

Description

Apparatus and method for cleaning a body having a surface layer to be removed.

The present invention relates to an apparatus for cleaning, particularly descaling, a body having a surface layer to be removed which moves in the direction of movement relative to the apparatus according to claim 1, To a method for cleaning.

A conventional apparatus for cleaning, particularly descaling, a body having a surface layer to be removed, such as a hot rolling stock having a scale layer to be removed in particular, is described, for example, in De 43 28 303 C2 or EP 1 798 424 B1 . This descaling device is provided, for example, to remove the scale layer present on the iron by a high-pressure water jet impinging at high pressure on the surface of the rolled material. A flat jet nozzle used for this purpose is attached to a cylindrical nozzle holder, the nozzle holder being rotatable about an axis perpendicular to the rolling stock and the surface of the rolled material moving past the device, And passes repeatedly to remove the scale from the rolled material.

In the two cited documents, several nozzle heads each having a plurality of flat jet nozzles are arranged in a line adjacent to each other perpendicular to the moving direction of the rolled material.

A disadvantage of the cleaning apparatus known in the prior art is that the end of the rolled material operates with more liquid than the central area as a result of the rotation of the nozzle head having on one hand a flat jet nozzle disposed thereon, called thermal stripes on the rolled material due to uneven cooling of the rolled material through jet-spraying.

Further, when the scale is removed from the rolled material, the portion of the scale may be removed in the direction of movement of the rolled material, which may cause the scale piece previously removed by the pressurized liquid in the next rolling process, And the risk of rolling back to the rolled material surface in the process.

Another disadvantage of the prior art arises from the fact that not only the scale but also the fluid jet itself is removed from the rolled material on top of the rolled material in a straightforward manner. The extended, unclear residence time of the liquid on the rolled material is dependent on the quality reduction braking effect on the subsequent impinging jet, the cooling of the undesired rolled material for energetic reasons and the reliability between the bottom of the rolled material and the cooler top Resulting in an undesirable temperature difference.

It is an object of the present invention to provide an apparatus and a method for cleaning a body having a surface layer to be moved and moved in a moving direction with respect to the apparatus, .

This object is achieved by an apparatus for cleaning having the features of claim 1. This object is further achieved by a method for cleaning having the features of claim 12.

The apparatus for cleaning according to the invention has at least one nozzle holder rotatably attached on a central bearing which is perpendicular or inclined to the surface layer to be treated.

The at least one nozzle holder has at least one jet nozzle located in the arm of the nozzle holder, from which pressurized liquid emerges during operation.

The jet nozzles are aligned in such a way that the surface layer is actuated by fluid jets emerging from the jet nozzles that are tilted with respect to the surface layer during operation.

In this case, the at least one jet nozzle is rotatably mounted on the nozzle holder about a rotational shaft oriented parallel to the central bearing, the jet nozzle having a direction of movement of the body, So that the angle between the orientations of the fluid jets is the same in the plane of the surface layer.

A rotating shaft is received in the central bearing with a feed line for the pressurized liquid, connected to a supply line in each arm of the nozzle holder, and open into the inlet opening of the nozzle housing of the jet nozzle .

The vector defined in the jet direction of the fluid jet from the jet nozzle at a pressure of 80 to 1000 bar does not have a component of the moving direction of the body.

This makes it possible to align the surface of the fluid to be removed, in particular the fluid jet, which removes the scale layer, so that the simultaneous rotation of the nozzle holder always has the same direction, on the one hand allowing uniform loading of the surface layer, The surface of the rolled material opens the possibility of using very little liquid because it reduces the difference in the specific energy input of the various surfaces of the rolled material.

Secondly, the direction of the jet of the jet nozzle is kept constant, which allows the jet nozzle to be arranged in such a way that it is emitted in a direction opposite to the direction of movement of the body with a velocity component that can always be set, Rolled back on the surface of the rolled material in a subsequent rolling process and avoids the remaining scale portions resulting in adverse cooling and thermal asymmetry from remaining on the rolled material beyond the device for descaling,

Due to the direction of ejection of the fluid jet from the jet nozzle, the surface piece to be removed by the action of the fluid jet is always removed from the surface of the body in a direction opposite to the direction of movement of the body.

Advantageous embodiments of the invention are the subject matter of the dependent claims.

According to an advantageous embodiment of the invention, said at least one jet nozzle can be synchronously driven by a transmission. This transmission particularly preferably comprises a central second gear non-rotatably attached on the central bearing in each arm of the nozzle holder and a second gear engaged non-rotatably with the third gear, Wherein the first and third gears are the same size and the amount of rotation of the jet nozzle and the nozzle holder is designed to be the same.

The selection of the radius of the first gear also makes it possible to position the jet nozzle at a different distance from the rotating shaft of the nozzle holder, thereby also forming a nozzle holder with several arms of different lengths, This is advantageous in view of the uniform area distribution of the hydraulic jet energy.

For rotation drive of the nozzle holder, the nozzle holder is non-rotatably connected to a rotationally driven rotational shaft received in a center bearing according to a preferred embodiment, and the supply line of pressurized liquid is received in the rotational shaft.

Alternatively, according to another embodiment of the present invention, the fourth gear driven by the drive gear is disposed non-rotatably on the nozzle holder itself.

According to a preferred embodiment, the nozzle holder has at least two arms, each of which is rotatably mounted with a jet nozzle.

According to another preferred embodiment, the plurality of nozzle holders are arranged side by side, and the turning radius of the surface swept by the arms of the nozzle holder partially overlap each other. This allows the device to be mounted according to the width of the rolled material having a plurality of such nozzle holders.

According to another embodiment of the present invention, the orientation of the jet nozzle determined by the moving direction of the rolled material and the angle between the impingement line of the fluid jet coming out of the jet nozzle may be predetermined in advance.

The method according to the invention is characterized in that the surface layer, in particular the surface of the rolled material, receives at least one jet nozzle when the fluid jet is received against the nozzle holder rotating about a rotating shaft oriented parallel to the central bearing of the nozzle holder, And is rotated in such a manner that the angle between the moving direction of the rolled material and the impingement line of the fluid jet coming out of the jet nozzle is kept constant.

In this case, the jet nozzle is rotated with respect to the rotating nozzle holder so that the jet direction of the fluid jet from the jet nozzle is always opposite to the direction of movement of the body.

Preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings.

1 is a perspective view of a first embodiment of an apparatus having two arm nozzle holders.
Figure 2 is a cross-sectional view of the device shown in Figure 1;
Figure 3 is a perspective view of another embodiment of an apparatus according to the invention having a nozzle holder with three arms.
4 is a perspective view of the device shown in Fig.
5 is a perspective view of a plurality of devices arranged in a line according to FIG.
6A-6D are views of the device shown in Fig. 1 viewed from below in different rotational positions in time.
7A-7D are plan views of the device formed according to Fig. 3, viewed from above in a different rotational position in time.
Figure 8 is a top view of an apparatus formed in accordance with Figure 3 with jet nozzles oriented differently from above.

In the following description of the drawings, terms such as up, down, left, right, front, rear, and the like refer to only the exemplary representation and location of the rolled material, center bearing, nozzle holder, It only makes sense. These terms should not be construed as limiting in any way, i.e. different working positions or mirror symmetrical designs, and these references may be changed.

Figures 1, 2 and 6a to 6d show a further embodiment of the device according to the invention, which moves in the direction of movement x with respect to the device and which is to be removed together with the pressurized liquid, in particular a body 2 with a hot rolled material, FIG. 2 shows a modification of the first embodiment of the apparatus 1 for cleaning, particularly descaling.

The invention will be further explained on the basis of an apparatus and a method for descaling a hot rolling material which has been translated in the moving direction (x) with respect to the apparatus, but is not limited in this application.

The descaled rolled material is particularly a slab or strip. It is also conceivable to use such a device for other designs of crude steel.

As shown in Figures 1, 2 and 6a to 6d, the device comprises two arm nozzle holders 3 with two arms 31, 32 rotatably attached to a central bearing 5 .

The gear 6 for rotation drive of the nozzle holder 3 is non-rotatably attached on the nozzle holder 3 which positively engages the drive gear (not shown) to rotate the nozzle holder 3 in operation .

From the lower portion of the nozzle holder 3 facing the rolled material 2, a pressurized liquid, for example, a jet nozzle (not shown), in which water is released during operation, for separating and removing the scale layer existing on the surface of the rolled material 4 protrude from the arms 31, 32, respectively.

)으로 유체 제트(12)를 방출하는 평평한 제트 노즐로서 형성된다. 상기 분사각(

)는 여기에서 상기 제트 노즐의 채널 끝에서부터 처리 될 표면 까지의 유체 제트의 패닝(fanning)으로 이해된다.The jet nozzle 4 is arranged on the surface of the rolled material in the embodiment shown in the drawing, preferably at an angle of spraying of 0 to 90 degrees, more preferably 10 to 50 degrees

As a flat jet nozzle that discharges the fluid jet 12 to the outside. The injection angle (

) Is understood herein as the fanning of fluid jets from the channel end of the jet nozzle to the surface to be treated.

)로 정렬되도록 가공 된 표면의 표면 법선(surface normal)으로 정렬된다. The jet nozzle (4) is arranged so that the ejected fluid jet (12)

) To the surface normal of the machined surface.

The pressure used is in the range of 80 to 1000 bar, preferably 200 to 400 bar.

Each of the jet nozzles 4 is surrounded by a housing 41 in which the second gears 9 and 10 are non-rotatably attached to the outside. The housing (41) is rotatably supported in the nozzle holder (3).

The supply of pressurized liquid from the jet nozzle 4 during operation is sealed through a rotary seal 42 and is supplied to a supply line 14 (not shown) which opens into an inlet opening 43 in the nozzle housing 41 ).

In order to combine the rotation of the nozzle holder 3 with the corresponding counter rotation of the jet nozzle 4, the first gears 7 and 8 are connected to the central bearing 5, And a second second gear 11 that is non-rotatably attached to third gears 9 and 10 that are non-rotatably attached to the jet nozzle 4, , 32).

The rotational speed of the nozzle holder 3 with respect to the central axis 5 is set to be equal to the rotational speed of the nozzle holder 3 because the first gears 7 and 8 and the third gears 9 and 10 have the same radius in this case, Of the jet nozzle (4).

6A to 6D due to the rotatability of the jet nozzle 4 with respect to the nozzle holder 3 formed directly on the nozzle and the rotational movement of the nozzle holder 3 with respect to the central axis 5, (Alpha) between the moving direction (x) of the rolled material and the impingement line of the fluid jet 12 exiting the jet nozzle 4 is kept constant. The term of the collision line should be understood as the major axis of the impact surface which is elliptical in the normal application direction.

The fluid jet (12), which linearly and obliquely impinges on the surface of the rolled material toward the surface of the rolled material, thus causes continuous scale removal from the surface of the rolled material, wherein the worn scale and the jet liquid Is always sprayed in the same direction with respect to the moving direction (x)

In addition, in this way, compared to a descaling device known from the prior art, water and energy input can be significantly reduced, which leads to more uniform and effective multiple loading of the rolled surface, Contributes to reducing the consumption of lower liquids, especially water, consumption and on the other hand, the optimized multiple application of pressurized water will cool the rolled material less and the material has to be reheated less before the next rolling process Because.

In the formation of the drive of the jet nozzle and the nozzle holder 3 through a transmission formed from a plurality of gears 7, 8, 9, 10 and 11, the discharge direction b is the direction of discharge of the jet nozzle 4 Can be preferably adjusted by the initial adjustment of the direction b so that the vector defined by the ejection direction b of the fluid jet 12 from the jet nozzle 4 is moved in the moving direction x of the rolled material, , It is ensured that the separated scale portion is not removed in the direction of movement (x) of the rolled material, otherwise the re-rolling of the previously separated scale pieces into the device in a subsequent rolling process .

3 to 5 and 7, another embodiment of the device according to the invention is shown. In the present embodiment, three arm nozzle holders 3 are formed together with three arms 31, 32, and 33.

Wherein the arms (31,32,33) are radially different in radial direction relative to the central bearing (5) and the jet nozzles (4) are also different in distance from the rotational shaft of the nozzle holder (3) (3).

According to the embodiment shown in Figs. 3 to 5 and 7, the driving of the nozzle holder 3 is generated through the rotating shaft 16 accommodated in the central bearing 5. Fig. One end of the rotating shaft 16 projects from a flange of the motor, and a motor can be coupled to the rotating shaft 16. At this time, the rotating shaft 16 is synchronously driven.

Below the end of the rotating shaft 16 there is an inlet opening for the high pressure connection 17 arranged on the housing 51 of the central bearing 5 through which the pressurized liquid flows to the rotary shaft 16, Is introduced into the supply line (13) incorporated in the supply line (13).

The rotating shaft 16 is preferably mounted on a rolling bearing in the housing 51 of the central bearing 5.

Furthermore, a fixing flange 52 is provided on the housing 51 of the central bearing 5, through which the housing 51 can be fixed to a carrier 51, ).

On the cylindrical portion of the housing 51 coupled to the nozzle holder 3 the second gear 11 is fixed non-rotatably in a circumferential direction and the rotation shaft 16 are non-rotatably connected to the nozzle holder 3.

When the rotating shaft 16 is set to rotational motion, the nozzle holder 3 rotates together. As a result, the first gears 7, 8, 18 in the nozzle holder 3 are rotated with respect to the fixed second gear 11 so that the rotation of the first gears 7, 8, The orientation of the jet nozzle 4 is kept constant with respect to the housing 51 of the central bearing 5 as the third gear 9, 10, 19 is also rotated in the opposite direction .

Figure 5 shows the arrangement of several devices positioned side by side for descaling with three arm nozzle holders. The device 1 is arranged in such a way that it rotates in the opposite direction with respect to each. It may also be considered to position and drive the individual devices such that each adjacent nozzle holder 3 rotates in the same direction.

The maintenance of the orientation of the jet nozzle 4 is again shown in Figures 7a to 7d. It is clear that the linear impingement surface of the pressurized liquid is similarly aligned at each rotational position of the nozzle holder 3.

)일 때 상기 압연재 표면의 왼쪽 상부에 정렬되고, 상기 노즐 홀더(3)의 회전 위치가 상기 압연재의 이동방향(x)에 대하여 밖으로 약 45도의 분사각(

)일 때 상기 rolling sotck 표면의 오른쪽 상부에 정렬되는 상기 제트 노즐(4)의 대안적인 배향을 도시한다.8 shows a state in which the rotational position of the nozzle holder 3 is out of the angle of about 45 degrees with respect to the moving direction x of the rolled material

), And the rotation position of the nozzle holder (3) is set to a spraying angle of about 45 degrees out of the moving direction (x) of the rolled material

), An alternative orientation of the jet nozzle 4 aligned at the upper right of the rolling sotck surface.

)를 정렬하고, 이에 따라 그렇지 않으면 후속 롤링 공정에서 상기 압연재의 표면으로 재롤링되는 분리된 스케일 부분이 상기 디스케일링을 위한 장치의 다른 쪽의 상기 압연재 상에 남아있는 것 및 불리한 냉각 및 열적 비대칭을 초래하는 제트 유체가 상기 압연재의 상부에 너무 오래 남아있는 것을 피하는 것이 중요하다.For example, it may also be considered to provide a respective individual alignment of the jet nozzles 4. In this case, the jet angle of the jet nozzle 4 with respect to the moving direction of the rolled material

) So that a separate scale portion, which otherwise would be re-rolled to the surface of the rolled material in a subsequent rolling process, remains on the rolled material on the other side of the device for descaling, and the unfavorable cooling and thermal It is important to avoid that the jet fluid resulting in asymmetry remains too long on top of the rolled material.

In the method with the apparatus as described above according to the invention for descaling the hot rolled material traveling along the moving direction (x) with respect to the apparatus together with the pressurized liquid, at least one jet nozzle (4) (3) with respect to the rotary nozzle holder (3) in such a manner that the angle (alpha) between the moving direction (x) of the rolled material (2) and the impingement line of the fluid jet (12) Is rotated during application to the surface of the rolled material with the fluid jet (12) during operation about a rotating shaft arranged parallel to the central bearing (5) of the holder (3). In this case, the jet nozzle 4 is preferably rotated with respect to the rotary nozzle holder 3 so that the direction of discharge of the fluid jet 12 from the jet nozzle 4 is parallel to the moving direction of the rolled material Occurs with a predetermined velocity component that is the opposite of the velocity component.

X와 충돌 라인사이의 각도

분사각

공격 각도1 device
2 body
3 nozzle holder
31 Cancer
32 Cancer
33 Cancer
4 jet nozzle
41 Housing
42 Rotating Seal
43 inlet opening
5 Center bearing
51 Housing
52 Fixed Flange
6 gears
7 Gear
8 gears
9 Gear
10 gears
11 gear
12 fluid jet
13 Supply Lines
14 Supply Lines
15 Roller Bearings
16 Rotary shaft
17 High voltage connection
18 gears
19 Gears
a rotation direction
X direction of movement
b emission direction

The angle between X and the collision line

Injection angle

Attack angle

Claims (12)

A body 2 having a surface layer, in particular a hot rolling stock, in particular slabs or strips, which moves with respect to the apparatus in the direction of movement x and which has to be removed with the pressurized liquid, An apparatus for descaling in particular,
At least one nozzle holder 3 rotatably mounted on a central bearing 5 perpendicular or inclined to the surface layer to be treated;
And at least one jet nozzle (4) installed in the arms (31, 32, 33) of the nozzle holder (3) for discharging the pressurized liquid during operation,
The jet nozzle 4 is configured such that a fluid jet 12 ejected from the jet nozzle 4 during operation generates an angle of attack

) To be applied to the surface layer in an inclined manner,
The at least one jet nozzle (4) is rotatably mounted on the nozzle holder (3) with respect to a rotational axis oriented parallel to the central bearing (5)
The jet nozzle 4 has an angle between the movement direction x of the body 2 and the orientation of the fluid jet 12 ejected from the jet nozzle 4 on the plane of the surface layer

Is kept rotationally driven in such a manner that it is kept constant,
The rotary shaft 16 in the central bearing 5 receives a supply line 13 for the pressurized liquid which is supplied to the inlet opening 43 of the nozzle housing 41 of the jet nozzle 4, Is connected to a supply line (14) in each of the arms (31, 32, 33) of the nozzle holder (3)
Characterized in that the vector defined in the direction of injection of the fluid jet (12) from the jet nozzle (4) under a pressure between 80 bar and 1000 bar does not have a component in the moving direction (x) of the body (2)
Cleaning device.
The method according to claim 1,
The at least one jet nozzle (4) has a jet angle of 0 to 90 degrees

) Is designed as a flat jet nozzle
Cleaning device.

The method according to claim 1,
Characterized in that said at least one jet nozzle (4) is motor driven by means of a variator
Cleaning device.
3. The method of claim 2,
First gears (7, 8, 18) in respective arms (31, 32, 33) of the nozzle holder (3) are rotatably mounted, And a third central gear 11 meshing with the second gear 11 and the third gear 9, 10 and 19 which are non-rotatably attached to the jet nozzle 4, (9, 10, 19) are of the same size
Cleaning device.
The method according to any one of claims 1 to 4,
The nozzle holder 3 is non-rotatably connected to a rotatable drive rotary shaft 16 received in the central bearing 5 and the pressurized liquid supply line 13 is connected to the rotary shaft 16 Characterized in that
Cleaning device.
4. The method according to any one of claims 1 to 3,
Further comprising a fourth gear (6) which is driven by a drive gear and is non-rotatably arranged on the nozzle holder (3)
Cleaning device.
8. The method according to any one of claims 1 to 6,
Characterized in that the nozzle holder (3) has at least two arms (31, 32)
Cleaning device.
8. The method according to any one of claims 1 to 7,
Characterized in that the plurality of nozzle holders (3) are arranged side by side and the turning radii of the surfaces swept by the arms (31, 32, 33) of the nozzle holder (3)
Cleaning device.

8. The method of claim 7,
Characterized in that the nozzle holder (3) arranged side by side is driven in the same rotational direction (a)
Cleaning device.
8. The method of claim 7,
Characterized in that the nozzle holder (3) arranged side by side is driven in different rotational directions (a)
Cleaning method.
The method according to any one of claims 1 to 10,
The angle between the moving direction x of the body 2 and the impingement line of the fluid jet 12 ejected from the jet nozzle 4

Characterized in that the orientation of the jet nozzle (4) which determines the direction
Cleaning method.
(2) having a surface layer, in particular a hot rolling stock, in particular slabs or strips, which moves in the direction of movement (x) relative to the device and which is to be removed with the pressurized liquid, , In particular a method for descaling,
At least one nozzle holder 3 rotatably mounted on a vertical or inclined central bearing 5 on the surface layer to be treated and
And at least one jet nozzle (4) provided in the arms (31, 32, 33) of the nozzle holder (3) for discharging the pressurized liquid during operation,
The jet nozzle 4 is oriented such that a fluid jet exiting the jet nozzle 4 during operation is applied to the surface layer in an inclined manner with respect to the surface layer,
At least one of said jet nozzles (4) is associated with said rotating nozzle holder (3) when it is applied to said surface layer with said liquid jet (12) 5 and an angle between the direction of movement of the body (x) and the orientation of the fluid jet (12) ejected from the jet nozzle (4)

) Is kept constant in the plane of the surface layer,
During operation, the jet nozzle 4 is designed so that the discharge direction of the fluid jet always has a vector component counter to the moving direction x of the body 2 from the jet nozzle 4, at a pressure of 80 bar to 1000 bar. Is rotated relative to the rotating nozzle holder (3) in such a manner as to be generated,
The pressurized liquid is contained in a rotary shaft embedded in the central bearing 5 and is in fluid communication with each of the nozzles 3 of the nozzle holder 3 which opens into the inlet opening 43 of the nozzle housing 41 of the jet nozzle 4 Is supplied via a supply line (13) connected to a supply line (14) in the arms (31, 32, 33)
Cleaning method.

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