TWM576924U - High pressure fluid rust remover for rectangular steel billet - Google Patents

Abstract

The present invention proposes a high-pressure fluid descaling device for rectangular steel blanks, characterized in that the forward tilt angle of the horizontal nozzles of the upper and lower rows is β1, and the forward tilt angle of the vertical nozzles of the left and right rows is β2, wherein the horizontal nozzles are different from the vertical nozzles. The anteversion angle, and β1>β2 or β1<β2. The high-pressure fluid descaling device of the rectangular steel preform of the present invention is designed by nozzle arrangement. When the rectangular steel embryo is derusted, the nozzle water curtain of the horizontal nozzle of the upper and lower rows and the nozzle water curtain of the vertical nozzle of the left and right rows are opposite to the steel embryo. The conveying direction is staggered back and forth, thereby avoiding mutual interference between the nozzle water curtains of adjacent horizontal and vertical nozzles larger than the width of the steel blank, thereby improving the derusting quality, reducing surface defects of the product, and improving the surface quality of the strip product.

Description

High-pressure fluid descaling device for rectangular steel embryo

This creation relates to a descaling device, and more particularly to a high pressure fluid descaling device for a rectangular steel blank.

Rectangular steel embryos such as small steel billets and large steel blooms are heated at a high temperature in the furnace, and the scales on the upper/lower/left/right sides of the steel blank must be removed to prevent the scale from being downstream. The rolling mill is rolled in, thus producing a flaw in the surface of the product. In order to solve the above problems, the high-pressure descaling device must be placed before the rolling mill, and the rust-removing water and the stripped stripe must be transported in the upstream direction, that is, in the opposite direction to the production line, to prevent the scale from being carried. The rolling zone in the downstream, that is, the traditional descaling method is reverse derusting, and the direction of the descaling water is opposite to that of the steel.

Referring to FIGS. 1 and 2, a conventional rectangular steel rust removing device is provided with a nozzle beside each of four sides of the steel blank 190, and each nozzle is provided with a plurality of nozzles 110, which spray rust-removing water. The direction of the direction is opposite to the direction in which the steel embryo 190 moves. In addition, the arrangement of the nozzles 110 adjacent to the four sides of the steel blank 190 is generally the same (only one side of the nozzle is shown in FIG. 2), both having the same rake angle β, and the total nozzle water curtain of the nozzle 110 The spray width must be greater than the width of the steel blank 190 such that when the steel blank 190 is transported away from the center of the production line or when the steel blank 190 is bent, the surface of the steel blank 190 can still be completely derusted.

Since the total width of the nozzle water curtain on the four sides of the descaling device is greater than the width of the corresponding steel embryo 190, interference will occur in the four corner regions of the steel embryo 190 (as shown in FIG. 3), causing water curtain cross interference. The derusting efficiency at the place is greatly reduced, resulting in incomplete rust removal in the four corner areas of the steel embryo 190. If the aluminum plate is used for the erosion test, it is obvious that the aluminum plate is eroded, and the water curtain interferes with the discontinuity.

In order to improve this phenomenon, Japanese Patent Laid-Open No. 2000-167617 proposes to stagger the water curtains of the mutually perpendicular nozzles and not to rust the same plane. However, this method will increase the space requirement of the descaling device, and also need to add a water inlet and a descaling nozzle, thereby increasing the investment cost; if the existing equipment is modified, the transformation will be more complicated and difficult due to equipment space constraints. .

In addition, the European patent (EP0047731) discloses that the nozzle water curtain spraying direction of the horizontal nozzles of the upper and lower rows is opposite to the steel embryo conveying direction by using the water curtains of the vertical nozzles in front and rear, that is, the nozzle water curtain of the horizontal nozzles of the upper and lower rows is reversed. Rust, and the nozzle water jet direction of the vertical nozzles of the left and right rows is the same as the direction of the steel embryo conveying, that is, the nozzle water curtain of the vertical nozzles of the left and right rows is rust-removal, so that the horizontal nozzles and the left and right rows of the upper and lower rows can be avoided. The nozzle water curtain of the vertical nozzle interferes. However, the nozzle water curtain of the vertical nozzle is derusted in the forward direction, and the peeled scale will be sprayed to the downstream rolling zone, and the scale may be rolled into the surface of the steel in the rolling process, causing the scale to be rolled. In addition, the high-pressure descaling device has a derusting efficiency due to the reverse and forward derusting, especially the faster the production speed, and the difference in the derusting efficiency is more obvious.

As mentioned above, the conventional nozzle arrangement design is shown in Fig. 2, and the adjacent nozzle water curtains are staggered by the index angle γ to prevent the adjacent nozzle water curtains from interfering with each other. However, the adjacent nozzle water curtain is in the water curtain overlap area, and the rebound water curtain of the rear nozzle water curtain impacts the front nozzle water curtain, so that the water curtain of the front nozzle in the overlapping area cannot directly impact the surface of the steel embryo, as can be clearly seen from FIG. 4 The interference of the adjacent nozzle water curtain in the water curtain overlap area. Please refer to FIG. 5, and in the laboratory aluminum plate erosion test, the erosion marks of adjacent nozzles do not overlap, and there is a "blank area" between the adjacent erosion marks (the area between the two broken lines on the aluminum plate), There is no erosion.

In order to solve the above problems, the present invention proposes a high-pressure fluid descaling device for a rectangular steel blank, which comprises a plurality of horizontal nozzles of the upper and lower rows and a plurality of vertical nozzles of the left and right rows, which are respectively arranged beside the four sides of the rectangular steel embryo. It is characterized in that the forward tilt angle of the horizontal nozzles of the upper and lower rows is β1, and the forward tilt angle of the vertical nozzles of the left and right rows is β2, wherein the horizontal nozzles and the vertical nozzles have different forward rake angles, and β1>β2 or β1<β2.

In the high-pressure fluid descaling device of the rectangular steel preform of the present invention, the center line of the horizontal nozzles of the upper and lower rows and the vertical nozzles of the left and right rows are perpendicular to the conveying direction of the steel embryo and are located on the same plane.

In the high-pressure fluid descaling device of the rectangular steel preform of the present invention, the adjacent nozzles of the horizontal nozzles of the upper and lower rows and the vertical nozzles of the left and right rows are parallel to each other and are staggered with respect to the direction of the steel embryo conveying.

In the high-pressure fluid descaling device of the rectangular steel preform of the present invention, the distance between the horizontal nozzles of the upper and lower rows and the adjacent nozzles of the vertical nozzles of the left and right rows are D1' and D2', respectively, and the water of the adjacent nozzles The impact area formed by the curtain spray on the surface of the steel embryo is parallel to the steel embryo conveying direction and is staggered back and forth. The distance between the impact area and the front and back is D1 and D2, respectively, where D1'= D1*cos b1 and D2'=D2 *cos b2.

The high-pressure fluid descaling device of the rectangular steel preform of the present invention is designed by nozzle arrangement. When the rectangular steel embryo is derusted, the nozzle water curtain of the horizontal nozzle of the upper and lower rows and the nozzle water curtain of the vertical nozzle of the left and right rows are opposite to the steel embryo. The conveying direction is staggered back and forth, thereby avoiding mutual interference between the nozzle water curtains of adjacent horizontal and vertical nozzles larger than the width of the steel blank, thereby improving the derusting quality, reducing surface defects of the product, and improving the surface quality of the strip product.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the following detailed description will be made in conjunction with the accompanying drawings. In the description of the present invention, the same components are denoted by the same reference numerals and will be described above.

Referring to FIGS. 6 and 7, the high-pressure fluid descaling device for the rectangular steel blank of the first embodiment of the present invention is provided with a nozzle beside the four sides of the rectangular steel blank 290, and a plurality of nozzles are disposed on each nozzle, wherein The nozzles disposed on the nozzles on the upper and lower sides of the steel blank 290 are horizontal nozzles 210 arranged in the upper and lower rows, and the nozzles disposed on the nozzles on the left and right sides of the steel preform 290 are vertical nozzles 220 arranged in the left and right rows, wherein the upper and lower rows are horizontal. The center line of the nozzle 210 and the vertical nozzles 220 of the left and right rows are perpendicular to the conveying direction of the steel blank 290 and are located on the same plane, but the horizontal nozzle 210 and the vertical nozzle 220 have different rake angles. In detail, if the forward tilt angle of the horizontal nozzle 210 is β1 and the forward tilt angle of the vertical nozzle 220 is β2, β1 is different from β2, that is, β1≠β2. In addition, the adjacent nozzle water curtains are also staggered by the index angle γ to avoid mutual nozzle water curtains interfering with each other.

Referring to FIG. 8, there is shown a nozzle water curtain 3D injection model in which the nozzle anteversion angle is β1>β2 in the high-pressure fluid descaling device of the rectangular steel preform according to the first embodiment of the present invention. Please also refer to FIG. 9, which shows a nozzle water curtain 3D injection model with a nozzle forward angle of β1<β2 in the high-pressure fluid descaling device of the rectangular steel preform of the first embodiment of the present invention. As can be seen from Fig. 8 and Fig. 9, when the horizontal nozzle 210 and the vertical nozzle 220 have different rake angles, the nozzle water curtain produced is staggered back and forth. With such a design, the nozzle water curtains of the horizontal nozzle 210 and the vertical nozzle 220 larger than the width of the steel blank 290 can be prevented from interfering with each other, thereby greatly improving the derusting quality and reducing the surface defects of the product.

Referring to FIGS. 10 and 11, a high-pressure fluid descaling device for a rectangular steel blank according to a second embodiment of the present invention is provided with a nozzle beside each of four sides of a rectangular steel blank 290, and a plurality of nozzles are disposed on each of the nozzles, wherein The nozzles disposed on the nozzles on the upper and lower sides of the steel blank 290 are horizontal nozzles 210 arranged in the upper and lower rows, and the nozzles disposed on the nozzles on the left and right sides of the steel preform 290 are left and right vertical nozzles 220, wherein the horizontal nozzles 210 and The vertical nozzles 220 have different rake angles, which are β1 and β2, respectively, and β1≠β2. In addition, adjacent nozzles in the horizontal/vertical nozzles 210/220 are parallel to each other and staggered back and forth, and the distance between them is D1′ and D2′, respectively, and the nozzle water curtain of the adjacent nozzles is impacted on the surface of the steel blank 290. The area is shown in Figure 11, where the distance between the impact areas of adjacent nozzle water curtains is D1 and D2, respectively, then D1' = D1 * cos b1 D2' = D2 * cos b2

Referring to FIG. 12, there is shown a nozzle water curtain 3D injection model in which the nozzle anteversion angle is β1>β2 in the high-pressure fluid descaling device for the rectangular steel blank of the second embodiment of the present invention. Please also refer to FIG. 13, which shows a nozzle water curtain 3D injection model in which the nozzle forward angle is β1<β2 in the high-pressure fluid descaling device of the rectangular steel blank according to the second embodiment of the present invention. As can be seen from FIG. 12 and FIG. 13, the nozzle water curtains of the horizontal nozzle 210 and the vertical nozzle 220 are staggered back and forth to prevent the horizontal nozzle 210 and the nozzle water curtain of the vertical nozzle 220 from interfering with each other. In addition, the indexing angle of the horizontal nozzle 210 and the vertical nozzle 220 approaches 0 degrees, and the adjacent nozzles are parallel to each other with respect to the conveying direction of the steel blank 290, and are staggered back and forth, which can reduce interference of adjacent nozzle water curtains in the overlapping area, and reduce The width of the blank area can greatly improve the descaling quality.

The high-pressure fluid descaling device of the rectangular steel preform of the present invention is designed by nozzle arrangement. When the rectangular steel embryo is derusted, the nozzle water curtain of the horizontal nozzle of the upper and lower rows and the nozzle water curtain of the vertical nozzle of the left and right rows are opposite to the steel embryo. The conveying direction is staggered back and forth, thereby avoiding mutual interference between the nozzle water curtains of adjacent horizontal and vertical nozzles larger than the width of the steel blank, thereby improving the derusting quality, reducing surface defects of the product, and improving the surface quality of the strip product.

Although the present invention has been disclosed in the foregoing examples, it is not intended to limit the present invention, and any one of ordinary skill in the art to which the present invention pertains can be modified and modified without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application attached.

110‧‧‧Nozzles

190‧‧‧ steel embryo

210‧‧‧Nozzles

220‧‧‧ nozzle

290‧‧‧ steel embryo

‧‧‧‧ forward angle

11‧‧‧ forward angle

22‧‧‧ forward angle

γ‧‧‧Transfer angle

D1‧‧‧ spacing

D2‧‧‧ spacing

D1’‧‧‧ spacing

D2’‧‧‧ spacing

Fig. 1 is a configuration diagram of a conventional rectangular steel rust removing device. 2 is a configuration diagram of a single-side nozzle in a conventional rectangular steel rust removing device. Figure 3 shows that the nozzle water curtain in four directions in the conventional rectangular steel rust removing device interferes in the four corner regions of the steel embryo. Figure 4 shows the interference of adjacent nozzle water curtains in the water curtain overlap region in the conventional rectangular steel blank descaling device. Figure 5 shows a blank area free of erosion between the adjacent nozzles in the laboratory aluminum plate erosion test. Fig. 6 is a configuration diagram of a high-pressure fluid descaling apparatus for a rectangular steel blank according to a first embodiment of the invention. Figure 7 is a geometrical arrangement of nozzles of a high pressure fluid descaling apparatus for a rectangular steel blank according to the first embodiment of the present invention. 8 is a 3D injection model of a nozzle water curtain in which a nozzle anteversion angle is β1>β2 in a high-pressure fluid descaling device for a rectangular steel blank according to a first embodiment of the present invention. 9 is a 3D injection model of a nozzle water curtain with a nozzle forward angle of β1<β2 in the high-pressure fluid descaling device for a rectangular steel blank according to the first embodiment of the present invention. Figure 10 is a configuration diagram of a high-pressure fluid descaling apparatus for a rectangular steel blank according to a second embodiment of the present invention. Figure 11 is a geometrical arrangement of nozzles of a high pressure fluid descaling apparatus for a rectangular steel blank according to a second embodiment of the present invention. 12 is a 3D injection model of a nozzle water curtain with a nozzle anteversion angle of β1>β2 in a high-pressure fluid descaling apparatus for a rectangular steel blank according to a second embodiment of the present invention. Fig. 13 is a 3D spray model of a nozzle water curtain in which a nozzle anteversion angle is β1 < β2 in a high-pressure fluid descaling device for a rectangular steel blank according to a second embodiment of the present invention.

Claims (4)

A high-pressure fluid descaling device for a rectangular steel embryo, comprising a plurality of horizontal nozzles of the upper and lower rows and a plurality of vertical nozzles of the left and right rows, respectively arranged to be arranged beside the four sides of the rectangular steel embryo, characterized in that: The rake angle of the horizontal nozzle is β1, and the forward rake angle of the vertical nozzles of the left and right rows is β2, wherein the horizontal nozzle has a different forward rake angle from the vertical nozzle, and β1>β2 or β1<β2. The high-pressure fluid descaling device for rectangular steel blanks according to claim 1, wherein the horizontal line of the upper and lower horizontal nozzles and the vertical line of the left and right vertical nozzles are perpendicular to the conveying direction of the steel embryo and are located on the same plane. . The high-pressure fluid descaling device for rectangular steel blanks according to claim 1 or 2, wherein the horizontal nozzles of the upper and lower rows and the adjacent nozzles of the vertical nozzles of the left and right rows are arranged parallel to each other with respect to the steel embryo conveying direction. Staggered before and after. The high-pressure fluid descaling device for rectangular steel blanks according to claim 3, wherein the horizontal nozzles of the upper and lower rows and the adjacent nozzles of the vertical nozzles of the left and right rows are staggered by D1' and D2', respectively. The impact area formed by the water curtain of adjacent nozzles on the surface of the steel embryo is parallel to the direction of the steel embryo conveying direction and is staggered back and forth. The distance between the front and rear of the impact area is D1 and D2, respectively, where D1'= D1*cos b1D2 '= D2*cos b2.