CN110947784A - Nitrogen purging device behind plate and strip finishing mill - Google Patents
Nitrogen purging device behind plate and strip finishing mill Download PDFInfo
- Publication number
- CN110947784A CN110947784A CN201911375448.0A CN201911375448A CN110947784A CN 110947784 A CN110947784 A CN 110947784A CN 201911375448 A CN201911375448 A CN 201911375448A CN 110947784 A CN110947784 A CN 110947784A
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- Prior art keywords
- pipe
- nitrogen
- finishing mill
- strip steel
- gas supply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
- B21B45/0278—Cleaning devices removing liquids
- B21B45/0281—Cleaning devices removing liquids removing coolants
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention relates to a plate and strip finishing mill rear nitrogen purging device which is arranged behind a finishing final stand rolling mill and comprises a main gas supply pipe and a plurality of collecting pipes connected with the main gas supply pipe, wherein the collecting pipes are uniformly arranged above a roller way along a rolling direction, pipe clamps are buckled on the collecting pipes and are connected with pipe clamp base plates below the collecting pipes through hexagon bolts to fix the collecting pipes, and a plurality of full cone nozzles are uniformly arranged at the bottoms of the collecting pipes. The nitrogen pipeline is connected into the nitrogen point valve box through the nearby nitrogen, the collecting pipe and the nozzle are installed, power sources such as hydraulic pressure and electric power are not needed, nitrogen purging is easily and efficiently carried out on the surface of the strip steel under the condition that the existing pipeline is not detached, construction is simple, operation is convenient, labor and time are saved, safety and high efficiency are achieved, isolation between the strip steel and air is achieved, the problem that secondary oxide scales on the surface of the strip steel are too thick is effectively solved, the generation of the secondary oxide scales is controlled, the surface smoothness of the strip steel is improved, and the surface quality of the strip steel is improved.
Description
Technical Field
The invention belongs to the technical field of metallurgical auxiliary devices, and particularly relates to a rear nitrogen purging device of a plate and strip finishing mill.
Background
The scale generated after the strip steel is heated by the heating furnace is primary scale or furnace-generated scale, the primary scale is removed after the strip steel is taken out of the furnace and descaled under high pressure, and the secondary scale or secondary scale is generated again. The problem of secondary oxide scales of a hot-rolled continuous strip steel production line is always an important factor for restricting the improvement of the surface quality of strip steel, namely the temperature of the strip steel after the strip steel is discharged from a finish rolling strip steel is usually between 800 and 950 ℃, after the size and the shape of the strip steel are detected by a multifunctional instrument, the strip steel enters a layer cooling area, and after the strip steel is subjected to spraying treatment by an upper collecting pipe and a lower collecting pipe in layer cooling, the temperature of the strip steel. The distance between the last stand of the finishing mill group and the layer cooling header is usually more than 10 meters, and the high-temperature strip steel is directly exposed to the air in the distance. The high-temperature strip steel quickly forms secondary iron scales when meeting oxygen in the air, and after cold rolling or flattening by downstream users, the strip steel is extruded by a straightening roller to have the defects of pits, iron scales pressed in and the like.
And a traditional fan is adopted for blowing and sweeping after the finishing mill group, and the device is mainly used for blowing and sweeping residual roller cooling water on the surface of the strip steel and preventing the cooling water from influencing the detection effect of the instrument on the thickness and the shape of the strip steel. However, the blower is adopted for blowing, the secondary oxidation speed of the strip steel is high, the secondary oxide scale is generated thickly, and meanwhile, the power consumption of the blower is high, the blowing noise is high, and the field environment is influenced.
Disclosure of Invention
The invention aims to provide a nitrogen purging device behind a plate and strip finishing mill, which can realize the isolation between strip steel and air by purging nitrogen on the surface of the strip steel after the strip steel is discharged from a finishing mill group, effectively control the generation of secondary iron scale and improve the surface smoothness of the strip steel.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a nitrogen gas sweeps device behind slab band finishing mill, sets up in the last rolling mill of finish rolling after, is responsible for many collector pipes of being connected including the air feed, with the air feed, and the collector pipe evenly sets up along rolling direction in the roll table top, detains on the collector pipe and is equipped with the pipe clamp, and the pipe clamp passes through hexagon bolt and is connected with the pipe clamp backing plate of collector pipe below, fixes the collector pipe, and the collector pipe bottom evenly is provided with a plurality of full cone nozzles.
Specifically, one end of the collecting pipe is connected with the main gas supply pipe in a welding mode through a butt welding joint, and the other end of the collecting pipe is provided with a plug for plugging.
Specifically, the full cone nozzle is connected with the bottom of the header in a welding mode through the welding base.
Specifically, a gasket is arranged between the hexagon bolt and the pipe clamp.
Specifically, the gas supply main pipe is connected with the nitrogen point valve box.
Specifically, the main gas supply pipe and the guide rail beam are arranged in parallel, and the collecting pipe and the main gas supply pipe are arranged vertically.
The invention has the following beneficial effects: the nitrogen purging device is arranged after the strip steel is discharged from the finishing mill group, a nitrogen pipeline, a mounting collecting pipe and a nozzle are connected through a nearby nitrogen point valve box, power sources such as hydraulic pressure and electric power are not needed, nitrogen purging is easily and efficiently performed on the surface of the strip steel under the condition that the existing pipeline is not disassembled, construction is simple, operation is convenient, labor-saving, time-saving, safe and efficient, isolation between the strip steel and air is achieved, the problem that secondary iron scales on the surface of the strip steel are too thick is effectively solved, generation of the secondary iron scales is controlled, the surface smoothness of the strip steel is improved, and the surface quality of the strip steel is improved.
Drawings
FIG. 1 is a schematic structural view of a nitrogen purging device after a strip finishing mill.
FIG. 2 is a top view of the nitrogen purge apparatus after the strip finishing mill.
Fig. 3 is an enlarged view of a portion B of fig. 1.
FIG. 4 is a schematic structural view of a single header of the nitrogen purging device after the strip finishing mill.
Fig. 5 is a sectional view taken along line a-a in fig. 4.
In the figure, 1, a hexagon bolt, 2, a gasket, 3, a pipe clamp, 4, a header, 5, a pipe clamp base plate, 6, a main gas supply pipe, 7, a butt welding joint, 8, a full cone nozzle, 9, a plug, 10 and a welding base.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
As shown in fig. 1-5, a strip finishing mill post nitrogen purge is provided between the finishing mill group end stand and the layer cooling header. The structure comprises a gas supply main pipe 6 arranged in parallel with the guide rail beam and a plurality of collecting pipes 4 vertically connected with the gas supply main pipe 6, wherein the gas supply main pipe 6 is connected with a nitrogen point valve box. The collecting pipes 4 are uniformly arranged above the roller way along the rolling direction, one end of each collecting pipe 4 is connected with the gas supply main pipe 6 in a welding mode through the butt welding joints 7, and the other end of each collecting pipe 4 is provided with the plugs 9 for plugging. The pipe clamp 3 is buckled on the collecting pipe 4, the pipe clamp 3 is connected with a pipe clamp base plate 5 below the collecting pipe 4 through a hexagon bolt 1, the collecting pipe 4 is fixed, and a gasket 2 is arranged between the hexagon bolt 1 and the pipe clamp 3. The bottom of the header 4 is uniformly provided with a plurality of full cone nozzles 8. The full cone nozzle 8 is welded to the bottom of the header 4 by a weld base 10.
A pneumatic valve control signal of the nitrogen purging device is accessed into a primary interlocking program, a steel biting signal of F2 is a pneumatic valve opening signal, and a steel throwing signal of F6 is a pneumatic valve closing signal, so that the aim of automatically controlling the nitrogen filling from the back of an F7 machine to an ultra-fast cooling area is fulfilled, the isolation between strip steel and air is realized, the generation of secondary iron scale is effectively controlled, and the surface smoothness of the strip steel is improved.
After finishing the final stand, the nitrogen pipes, mounting headers and nozzles were connected through a nearby nitrogen point valve box. Under the condition of not disassembling the existing pipeline and the like, a nitrogen space from F7 to a laminar cooling area can be easily and efficiently formed, the nitrogen blowing device can be used for blowing by nitrogen conveniently and efficiently, the effective coverage of the surface of the strip steel by nitrogen is realized, the contact between high-temperature strip steel and oxygen is isolated, the generation of secondary oxide scales is effectively controlled, the surface quality of the strip steel is improved, and the nitrogen blowing device is labor-saving, time-saving, safe and efficient.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (6)
1. The utility model provides a nitrogen gas sweeps device behind slab band finishing mill, its characterized in that includes the air feed main pipe, is responsible for many collector pipes of being connected with the air feed, and the collector pipe evenly sets up along rolling direction above the roll table, detains on the collector pipe and is equipped with the pipe clamp, and the pipe clamp passes through hex bolts and is connected with the pipe clamp backing plate of collector pipe below, fixes the collector pipe, and the collector pipe bottom evenly is provided with a plurality of full cone nozzles.
2. A strip finishing mill rear nitrogen purging device as claimed in claim 1, wherein one end of the header is connected with the gas supply main pipe by welding through a butt joint, and the other end is provided with a plug for plugging.
3. A strip finishing mill post nitrogen purge apparatus as claimed in claim 1, wherein the full cone nozzle is welded to the header bottom by a weld base.
4. A strip finishing mill post nitrogen purge apparatus as claimed in claim 1, wherein a washer is provided between the hex bolt and the tube clamp.
5. A strip finishing mill post nitrogen purge apparatus as claimed in claim 1, wherein the gas supply main is connected to a nitrogen point valve box.
6. A strip finishing mill post nitrogen purge apparatus as claimed in claim 1, wherein the gas supply main is arranged in parallel with the guide rail beam, and the header is arranged perpendicular to the gas supply main.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911375448.0A CN110947784A (en) | 2019-12-27 | 2019-12-27 | Nitrogen purging device behind plate and strip finishing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911375448.0A CN110947784A (en) | 2019-12-27 | 2019-12-27 | Nitrogen purging device behind plate and strip finishing mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110947784A true CN110947784A (en) | 2020-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911375448.0A Pending CN110947784A (en) | 2019-12-27 | 2019-12-27 | Nitrogen purging device behind plate and strip finishing mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110947784A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142828A (en) * | 1980-04-09 | 1981-11-07 | Ishikawajima Harima Heavy Ind Co Ltd | Rolling equipment |
| CN1404420A (en) * | 2000-12-27 | 2003-03-19 | Posco公司 | Method and device for manufacturing a hot rolled steel strip |
| CN204135079U (en) * | 2014-06-10 | 2015-02-04 | 莱芜钢铁集团有限公司 | A kind of milling train gas curtain descaling device |
| CN109622639A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | The blow device of milling train outlet belt steel surface emulsion |
| CN209697723U (en) * | 2018-12-21 | 2019-11-29 | 首钢京唐钢铁联合有限责任公司 | Roughing mill entry iron scale sweeps device |
-
2019
- 2019-12-27 CN CN201911375448.0A patent/CN110947784A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142828A (en) * | 1980-04-09 | 1981-11-07 | Ishikawajima Harima Heavy Ind Co Ltd | Rolling equipment |
| CN1404420A (en) * | 2000-12-27 | 2003-03-19 | Posco公司 | Method and device for manufacturing a hot rolled steel strip |
| CN204135079U (en) * | 2014-06-10 | 2015-02-04 | 莱芜钢铁集团有限公司 | A kind of milling train gas curtain descaling device |
| CN109622639A (en) * | 2017-10-09 | 2019-04-16 | 上海宝冶集团有限公司 | The blow device of milling train outlet belt steel surface emulsion |
| CN209697723U (en) * | 2018-12-21 | 2019-11-29 | 首钢京唐钢铁联合有限责任公司 | Roughing mill entry iron scale sweeps device |
Non-Patent Citations (1)
| Title |
|---|
| 何志军等: "《钢铁冶金过程环保新技术》", 31 August 2017 * |
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Application publication date: 20200403 |