US 9,174,256 B2Granted

Hot rolling high-pressure fluid descaling method and descaling apparatus

AssigneeChina Steel Corporation

InventorsKun-Cheng Tung, Chung-Ping Ju, Pi-Kun Cheng, Chao-Chi Huang, Chun-Chao Shih

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Abstract

The present invention relates to a hot rolling high-pressure fluid descaling method and descaling apparatus. The apparatus comprises at least one descaling unit, a axial direction of a main pipe header of the descaling unit and a rolling stock transportation direction intersect. Each nozzle ejects fluid onto a surface of the rolling stock to form an impact region. The adjacent impact regions are presented in an alternate pattern on the surface of the rolling stock. The center lines of the impact regions along a longitudinal direction are spaced apart by a specific distance, and the center lines are essentially perpendicular to the rolling stock transportation direction.

A hot rolling high-pressure fluid descaling apparatus, comprising at least one descaling unit, wherein the at least one descaling unit comprises:

a main pipe header, wherein a projection of an axial direction of the main pipe header on a surface of a rolling stock and a rolling stock transportation direction intersect, and the main pipe header is used to supply a fluid;
and
a plurality of nozzles, arranged on the main pipe header, wherein each nozzle is orientated towards a direction opposite to the rolling stock transportation direction and ejects the fluid onto the surface of the rolling stock so as to form an impact region, the adjacent impact regions are essentially parallel to one another and presented in an alternate pattern on the surface of the rolling stock, a center line of each impact region along a longitudinal direction of the impact region itself is spaced apart between its adjacent impact region by a specific distance, and a projection of the center line on the rolling stock is essentially perpendicular to the rolling stock transportation direction,
wherein the center lines of the adjacent nozzles are parallel to one another;
wherein D is the perpendicular distance between the adjacent impact regions, D′ is the distance between the front and rear staggered nozzles, and β is the inclination angle that is between the center line of the nozzles and the normal line of the surface of the rolling stock, and the relationship is D′=D cosβ;
wherein the geometry relationship between the adjacent impact regions is as follows:
D
=
E
⁢
⁢
sin
⁢
⁢
γ
;
(
1
)
G
=
E
⁢
⁢
sin
⁢
⁢
γ
cos
⁢
⁢
X
⁢
sin
⁡
(
X
+
γ
)
;
(
2
)
G
=
D
cos
⁢
⁢
X
⁢
sin
⁡
(
X
+
γ
)
;
(
3
)
where X is the diverging angle due to the rebounding of the jet spray;
E is distance between the center line of the adjacent nozzles along the axial direction of the main pipe header;
G is the width of the blank region between the adjacent impact regions;
γ is the offset angle, which is the angle between the longitudinal direction of the impact regions and the direction perpendicular to the rolling stock transportation direction;
and the offset angle approaches zero.

65 more elements

Abstract

Claims10