CN215236826U - Scale breaking device for removing scale of intermediate blank - Google Patents
Scale breaking device for removing scale of intermediate blank Download PDFInfo
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- CN215236826U CN215236826U CN202121357374.0U CN202121357374U CN215236826U CN 215236826 U CN215236826 U CN 215236826U CN 202121357374 U CN202121357374 U CN 202121357374U CN 215236826 U CN215236826 U CN 215236826U
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- intermediate billet
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Abstract
A scale breaking device for removing scale scales on an intermediate billet comprises two water collecting pipes which are respectively positioned at the upper side and the lower side of the intermediate billet and symmetrically arranged, the length direction of each water collecting pipe is consistent with the width of the intermediate billet, each water collecting pipe is arranged between a flying shear in front of a finish rolling stand and a high-pressure water descaling box, a row of scale breaking water nozzles are uniformly distributed on each water collecting pipe, and the angle A between the axis of each scale breaking water nozzle and the intermediate billet is 70-75 degrees. The device sets up two collector pipes before the finish rolling frame between flying shear and the descaling case, the water injection well choke of descaleing is installed to the collector pipe. In the process of conveying the rough rolling intermediate billet to finish rolling, firstly blasting and washing the scale of the intermediate billet by the high-pressure water impact of the scale breaking water nozzle of the intermediate billet; and then the high-pressure water descaling box in front of the finish rolling stand enters the interface between the oxide layer and the billet substrate through the cracks on the surface of the oxide layer, so that the secondary oxide scale on the surface of the billet is effectively removed.
Description
Technical Field
The utility model relates to a steel rolling equipment, especially a scale breaking device for driving middle billet iron oxide scale belongs to ferrous metallurgy technical field.
Background
In the rolling process, oxidation of the cold-rolled base material occurs from heating to rough rolling, finish rolling to coiling and subsequent cooling. The billet steel needs to be subjected to multi-pass rough rolling in the hot rolling production process, the billet steel is still in a high-temperature condition at the moment, more iron scales are continuously formed, secondary iron scales are deformed and broken in the rolling process, and the iron scales are pressed into the strip steel matrix to form shallow-layer pressed iron scales because the strip steel matrix is very soft at high temperature and the intensity of the iron scales relative to the strip steel matrix is higher. In addition, after the rough rolling of the billet is finished, the oxidation time of the billet on a conveying roller way is short, secondary oxide scales with the thickness of about 100-150 mu m are generated on the surface of the billet, and the bonding force between the billet and a strip steel substrate is weak. But scale fragments are not removed completely every time during descaling. After the steel plate is pressed into the surface of the steel plate through finish rolling, the defects that the surface of the strip steel presents rugged rough surfaces are called pits. The scale indentation defect is a quality defect which is very common in hot rolled strip steel products and has great influence on the use of downstream users, and the scale indentation defect can not be removed by acid cleaning, even has residual scale defects after cold rolling, and further influences deep processing production such as stamping, coating and plating of downstream processes.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a purpose is to blasting, impact and washing and provide a broken scale device for driving blank scale in middle of to the secondary scale that intermediate billet surface formed.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a scale breaking device for removing scale scales on an intermediate billet comprises two water collecting pipes which are respectively positioned at the upper side and the lower side of the intermediate billet and symmetrically arranged, the length direction of each water collecting pipe is consistent with the width of the intermediate billet, each water collecting pipe is arranged between a flying shear in front of a finish rolling stand and a high-pressure water descaling box, a row of scale breaking water nozzles are uniformly distributed on each water collecting pipe, and the angle A between the axis of each scale breaking water nozzle and the intermediate billet is 70-75 degrees.
In the scale breaking device for removing the scale scales on the intermediate billet, each scale breaking water nozzle is provided with the special-shaped nozzle, the special-shaped nozzle is in a jujube kernel shape, and the inclination angle B of the special-shaped nozzle relative to the horizontal plane is 12-15 degrees.
According to the scale breaking device for removing the scale of the intermediate blank, 10-14 scale breaking water nozzles are arranged on each water collecting pipe, the length L of each special-shaped nozzle is 8-10 mm, the width H of each special-shaped nozzle is 3 mm, and the length direction of each special-shaped nozzle is consistent with the width direction of the intermediate blank.
The scale breaking device for removing the scale of the intermediate billet further comprises a first hot metal detector and a second hot metal detector, wherein the first hot metal detector is positioned in front of the flying shears, and the second hot metal detector is positioned between the flying shears and the water collecting pipe.
The utility model discloses the problem of clearing away the existence unclean to blank iron scale in the middle of solving improves, set up two collector pipes before the finish rolling frame between flying shear and the descaling case, the water injection well choke is descaled in the installation on the collector pipe. In the process of conveying the rough rolling intermediate billet to finish rolling, firstly blasting and washing the scale of the intermediate billet by the high-pressure water impact of the scale breaking water nozzle of the intermediate billet; and then the high-pressure water descaling box in front of the finish rolling stand enters the interface between the oxide layer and the billet substrate through the cracks on the surface of the oxide layer, so that the secondary oxide scale on the surface of the billet is effectively removed. The surface quality of the intermediate blank is improved, the pressing-in defect of the iron scale is effectively controlled, and the surface quality of the strip steel is favorably improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a view from the D-direction of FIG. 1 (not to scale);
FIG. 3 is a side view of FIG. 2 (not to scale);
fig. 4 is a view (not to scale) of fig. 3 in the direction of C.
The list of labels in the figure is: 1. the device comprises an intermediate billet, 2, a first hot metal detector, 3, a flying shear, 4, a first hot metal detector, 5, a water collecting pipe, 6, a scale breaking water nozzle, 6-1, a special-shaped nozzle, 7, a scale removing box, 8 and a roller way.
Detailed Description
Referring to fig. 1, the scale breaking device of the present invention comprises two water collecting pipes 5 respectively located at the upper and lower sides of the middle blank 1, and the middle blank is conveyed by a roller way 8. The length direction of the water collecting pipe is consistent with the width of the intermediate billet, the water collecting pipe is arranged between a flying shear 3 and a descaling box 7 in front of a finish rolling rack, a row of scale breaking water nozzles 6 are uniformly distributed on each water collecting pipe, the scale breaking water nozzles face the running direction of the intermediate billet 1, and the angle A between the axis of each scale breaking water nozzle and the intermediate billet is 70-75 degrees.
Referring to fig. 2-4, each water collecting pipe is provided with 10-14 scale breaking water nozzles, and the water collecting pipe of the illustrated embodiment is provided with 12 scale breaking water nozzles. Each scale breaking water nozzle 6 is provided with a special-shaped nozzle 6-1, the special-shaped nozzle is in a jujube core shape, the inclination angle B of the special-shaped nozzle relative to the horizontal plane is 12-15 degrees, and a water outlet similar to a cutting edge is formed. The length L of the special-shaped nozzle is 8-10 mm, the width H of the special-shaped nozzle is 3 mm, the length direction of the special-shaped nozzle is consistent with the width direction of the intermediate blank, and water flow jetted by the special-shaped nozzle is distributed in a sector shape and covers the whole surface of the intermediate blank. The scale breaking water pressure is 1.2-1.5 MPa, and the secondary oxide scale of the intermediate blank is promoted to break under the impact of water flow with certain pressure. The angle arrangement of the scale breaking water nozzle is matched with the shape and the angle arrangement of the special-shaped nozzle, so that the pressure water flow can blast, impact and clean the iron scales on the upper surface and the lower surface of the intermediate blank; and then the intermediate billet enters a descaling box 7 for descaling again, and the cracks impacted on the surface of the oxidation layer by the high-pressure water through the descaling device enter the interface between the oxidation layer and the billet base body, so that the secondary oxide scales on the surface of the billet are effectively removed, the surface quality of the intermediate billet is obviously improved, the defect of the oxide scales pressed in is effectively controlled, and the surface quality of the strip steel is favorably improved.
Still referring to fig. 1, the apparatus further includes a first hot metal detector 2 located in front of the flying shears near the flying shears and a second hot metal detector 4 located between the flying shears and the header near the header. The two hot metal detectors are installed because the first metal detector is linked with the flying shears, namely, a strip steel signal is detected, and the circuit is closed after the strip steel comes; the second metal detector is turned on to start spraying water. When the first hot metal detector and the second hot metal detector detect the intermediate billet signals, the electromagnetic valve connected with the water collecting pipe is electrified, the scale breaking water nozzle starts to spray water flow, and the intermediate billet iron oxide scale is blasted and washed; when the strip steel is rolled to an F7 finishing mill (a final finishing mill), a load signal is switched on, the electromagnetic valve is powered off, and the scale breaking water nozzle stops spraying.
Claims (4)
1. A scale breaking device for removing scale of an intermediate blank is characterized in that: the device comprises two water collecting pipes which are respectively positioned at the upper side and the lower side of an intermediate billet and are symmetrically arranged, the length direction of each water collecting pipe is consistent with the width of the intermediate billet, each water collecting pipe is arranged between a flying shear in front of a finish rolling rack and a high-pressure water descaling box, a row of scale breaking water nozzles are uniformly distributed on each water collecting pipe, and the angle A between the axis of each scale breaking water nozzle and the intermediate billet is 70-75 degrees.
2. The scale breaking apparatus for removing intermediate billet scale as defined in claim 1, wherein: each scale breaking water nozzle is provided with a special-shaped nozzle, the special-shaped nozzle is in a jujube core shape, and the inclination angle B of the special-shaped nozzle relative to the horizontal plane is 12-15 degrees.
3. The scale breaking apparatus for removing scale from an intermediate billet as set forth in claim 2, wherein: each water collecting pipe is provided with 10-14 scale breaking water nozzles, the length L of each special-shaped nozzle is 8-10 mm, the width H of each special-shaped nozzle is 3 mm, and the length direction of each special-shaped nozzle is consistent with the width direction of the intermediate blank.
4. A scale breaking apparatus for removing intermediate billet scale as defined in claim 3, wherein: the device also comprises a first hot metal detector and a second hot metal detector, wherein the first hot metal detector is positioned in front of the flying shears, and the second hot metal detector is positioned between the flying shears and the water collecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121357374.0U CN215236826U (en) | 2021-06-18 | 2021-06-18 | Scale breaking device for removing scale of intermediate blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121357374.0U CN215236826U (en) | 2021-06-18 | 2021-06-18 | Scale breaking device for removing scale of intermediate blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215236826U true CN215236826U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121357374.0U Active CN215236826U (en) | 2021-06-18 | 2021-06-18 | Scale breaking device for removing scale of intermediate blank |
Country Status (1)
| Country | Link |
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| CN (1) | CN215236826U (en) |
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2021
- 2021-06-18 CN CN202121357374.0U patent/CN215236826U/en active Active
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