CN103357675A - Aerial fog cooling method and device for hot rolling H-shaped steel cooling bed - Google Patents
Aerial fog cooling method and device for hot rolling H-shaped steel cooling bed Download PDFInfo
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- CN103357675A CN103357675A CN2013102641941A CN201310264194A CN103357675A CN 103357675 A CN103357675 A CN 103357675A CN 2013102641941 A CN2013102641941 A CN 2013102641941A CN 201310264194 A CN201310264194 A CN 201310264194A CN 103357675 A CN103357675 A CN 103357675A
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Abstract
The invention relates to the technical field of heat rolling steel, in particular to an aerial fog cooling method and device for a heat rolling H-shaped steel cooling bed. The method comprises the following steps: 1, preparing cooling water and compressed air; 2, conveying the cooling water and the compressed air; 3, mixing the water and the air to form cooling aerial fog; 4, performing jetting aerial fog to a rolled piece to realize cooling. The device comprises a cooling water pipeline with valves and a compressed air pipeline with valves, wherein the cooling water pipeline is connected with an workshop industrial water main pipeline, and the compressed air pipeline is connected with a workshop air main pipeline; jet nozzles are connected with the tail ends of both the cooling water pipeline and the compressed air pipeline. According to the method and the device, a plurality of jet heads which are uniformly distributed are utilized to jet cooling aerial fog to perform aerial fog cooling to the rolled piece, so that the surface of the rolled piece is enabled to be cooled uniformly, and the bending deformation of the rolled piece is small, no accumulated water exists on the surface of the rolled piece when the rolled piece gets off the cooling bed, and the problem of poor capability of the hot rolling H-shaped steel cooling bed can be efficiently solved.
Description
Technical field
The present invention relates to the hot-rolled steel technical field, relate in particular to a kind of method and device thereof for the cooling hot-rolled H shaped steel of cold bed aerosol.
Background technology
The economical rationality of H shaped steel cross sectional shape, mechanical property is good, and the each point extension is even on the cross section when rolling, internal stress is little, compares with common I-steel, has advantages of that modulus of section is large, lightweight, save metal, can make building structure alleviate 30-40%; Parallel because of the outside in its leg again, the leg end is the right angle, and assembling combination becomes member, can save welding, the riveting work amount reaches 25%.Be usually used in the requirement bearing capacity large, the heavy construction of cross section good stability (such as factory building, skyscraper etc.), and bridge, boats and ships, handling machinery, Equipment Foundations, support, foundation pile etc.
In hot rolled H-shaped semicontinuous or full continuous rolling production process; existing part producer begins to attempt being arranged on the line traffic control cooling device after mm finishing mill unit; the finished product rolled piece is controlled cooling; roll rear cooling velocity by increase; the refinement ferrite crystal grain; increase simultaneously the quasi-eutectoid pearlite fraction; the reasonable distribution cooling capacity makes ferrite crystal grain obtain maximum refinement; and then improve hot rolled H-shaped performance; also alleviated to a certain extent the temperature of cold bed on the rolled piece, it is not enough that part has alleviated cooling efficiency.
But, no matter whether adopt aforesaid way, because in hot rolled H-shaped production process, along with the quickening of rhythm of production, the ability wretched insufficiency of cold bed becomes the bottleneck that suppresses rhythm of production.Otherwise it is too high that the finished product rolled piece goes out cold bed temperature, is unfavorable for the aligning of finished product rolled piece, affects the quality of rolled piece.If adopt directly water spray cooling rolled piece at cold bed, easily cause web flexural deformation and inhomogeneous cooling, can not thoroughly solve not enough this problem of cooling efficiency.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of hot rolled H-shaped cold bed aerosol cooling method and device thereof, this aerosol cooling method and device can improve the cold bed cooling capacity and make the rolled piece cooling evenly.
For achieving the above object, the scheme that the present invention adopts is: a kind of hot rolled H-shaped cold bed aerosol cooling method, and it comprises following step:
1) cooling water and compressed-air actuated preparation: the steel rolling water treatment system adds by water pump with Treatment of Industrial Water and after being cooled to supply water temperature and is sent to workshop industry water trunk line, and plant area's air compression station is handled compressed air well after the air compressor machine pressurization and delivered to the workshop air trunk line by plant area's pipe network;
2) cooling water and compressed-air actuated conveying: cooling water and compressed air are introduced from workshop industry water trunk line and workshop air trunk line respectively, be delivered to cold bed by cooling water pipeline and the compressed air piping of laying in advance respectively again, be provided with the valve of control break-make on cooling water pipeline and the compressed air piping;
3) gas-vapor mix forms the cooling aerosol: cooling water pipeline and compressed air piping end are connected with nozzle, open first the compressed air piping valve and pass into compressed air, the compressed air rate is introduced in the hybrid chamber of nozzle, then open cooling water pipeline, cooling water enters in the hybrid chamber of nozzle subsequently, and compressed air forms the cooling aerosol with cooling water atomizing in the gas of nozzle, water hybrid chamber;
4) aerosol sprays rolled piece realization cooling: the cooling aerosol of mixing is sprayed by nozzle, and aerosol is sector shape and is injected in the rolled piece bottom, realizes the cooling of rolled piece (hot rolled H-shaped).
Hydraulic pressure and compressed air pressure keep between 0.4MPa～0.6MPa in the described step 1), and the steel rolling water treatment system provides the stable industry water below 32 ℃.
Described step 2) cooling water pipeline of every cold bed and compressed air piping are respectively equipped with seven groups in, and the head end of cooling water pipeline links to each other with workshop industry water trunk line, and the head end of compressed air piping links to each other with the workshop air trunk line; The end of cooling water pipeline and compressed air piping is divided into three road arms, links to each other with shower separately by middle pipe arrangement, and shower connects described nozzle.
Nozzle described in the described step 3) is comprised of cavity and shower nozzle, cavity has air cavity, water cavity and hybrid chamber, air cavity, water cavity all are connected with hybrid chamber, and water cavity, air cavity connect respectively cooling water pipeline and compressed air piping, and hybrid chamber is positioned at directly over the air cavity and with shower nozzle and is connected.
The jet angle of nozzle described in the described step 3) is 75 °.
Described every group of shower is provided with eight nozzles, and the distance of the lower surface of nozzle and cold bed static rack is 90mm.
Establish manual ball valve or flow control valve on the pipe arrangement in the middle of described.
A kind of hot rolled H-shaped cold bed gas-mist cooling device, it includes cooling water pipeline and compressed air piping, is equipped with the valve of control break-make on cooling water pipeline and the compressed air piping; The cooling water pipeline head end connects workshop industry water trunk line, workshop industry water trunk line connects the steel rolling water treatment system and introduces cooling processing and the industry water after the water pump pressurization, the compressed air piping head end connects the workshop air trunk line, and the workshop air trunk line connects the compressed air of plant area's pipe network introducing after the air compressor machine pressurization; Cooling water pipeline is connected end and is all connected nozzle with compressed air piping, nozzle is arranged on cold bed below and jet hole towards rolled piece, each nozzle is comprised of cavity and shower nozzle, cavity has air cavity, water cavity and hybrid chamber, air cavity, water cavity connect respectively compressed air piping and cooling water pipeline, and hybrid chamber is positioned at directly over the air cavity and with shower nozzle and is connected.
The compressed air that utilization of the present invention possesses certain air pressure atomizes to cooled industry water, a plurality of shower nozzles that utilization is evenly distributed spray the cooling aerosol rolled piece are carried out the aerosol cooling, so that the rolled piece surface cool is even, flexural deformation is little, the surface is without ponding during cold bed under the rolled piece, and finished product shaped steel non-corroding phenomenon occurs, and mechanical performance index does not almost change, the aligning rejection number that causes because of high-temperature straightening is effectively controlled, and can effectively solve the problem of hot rolled H-shaped cooling efficiency deficiency simultaneously.
Description of drawings
Fig. 1 is the schematic diagram that the pipeline of the embodiment of the invention is installed.
Fig. 2 is the nozzle scheme of installation of the embodiment of the invention.
Description of symbols among the figure: 1-nozzle, 2-water sprayer tube, pipe arrangement in the middle of the pipe arrangement in the middle of the 3-gas shower, 4-cooling water, 5-compressed air, 6-Pneumatic butterfly valve; 7-pneumatic ball valve; 8-cooling water pipeline, 9-compressed air piping, 10-workshop industry water trunk line, 11-workshop air trunk line; 12,13-manual ball valve.
The specific embodiment
For understanding better the present invention, below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described further, referring to Fig. 1 and Fig. 2.
The present invention utilizes the method for aerosol cooling and device thereof that the hot-rolling H-shaped steel part is cooled off, when effectively solving hot rolled H-shaped cold bed cooling capacity deficiency, so that the rolled piece surface cool is even, flexural deformation is little, thereby will be effectively controlled because of the aligning rejection number that high-temperature straightening causes.This method comprises following four steps:
1) cooling water and compressed-air actuated preparation: for can ensure air and cooling water from the workshop trunk line along the logical cold bed that is delivered to, and before injection, effective the mixing reach the purpose that hazes, so the cooling water and air is delivered to the workshop trunk line after needing to use in advance water pump and air compressor machine to pressurize respectively, pressure can not be too high otherwise can be damaged the rolled piece surface, but can not be too low, the aqueous vapor hypotony just is difficult to haze fully.In addition, cooling is unsuitable too high with the temperature of industry water, otherwise speed and the poor effect of cooling, but the excessively low words of the temperature of industry water just so that cost improve.In the present embodiment, hydraulic pressure and compressed air pressure need to be kept between 0.4MPa～0.6MPa, the steel rolling water treatment system guarantees that industry water is cooled to below 32 ℃.
2) cooling water and compressed-air actuated conveying:
Cooling water and compressed air are introduced from workshop industry water trunk line 10 and workshop air trunk line 11, be delivered to cold bed by cooling water pipeline 8 and the compressed air piping 9 of laying in advance respectively again, because adopt long chi cooling rolled piece longer, more cooling water pipeline 8 and compressed air piping 9 need to be divided into organizes and is evenly distributed on below the rolled piece, just can reach comprehensive cooling rolled piece and prevent the bending that rolled piece causes because of inhomogeneous cooling, compressed air piping 9 and cooling water pipeline 8 all arrange seven groups in the present embodiment, the head end of cooling water pipeline 8 links to each other with workshop industry water trunk line 10, and the head end of compressed air piping 9 links to each other with workshop air trunk line 11; The end of cooling water pipeline 8 and compressed air piping 9 is divided into three road arms, and by pipe arrangement 4 and gas shower 3 and 2 corresponding linking to each other of water sprayer tube in the middle of pipe arrangement 5, the cooling water in the middle of the compressed air, water sprayer tube 2, gas shower 3 all access to described nozzle respectively.Compressed air and cooling water need to a minute sequential be filled with, and need to select compressed air piping 9 and 8 groups of numbers of cooling water pipeline of devoting oneself to work according to the length computation of rolled piece, so be provided with the valve of control break-make on cooling water pipeline 8 and the compressed air piping 9.In the present embodiment, compressed air piping 9 is opened by pneumatic ball valve 7 systems, and cooling water pipeline 8 is opened by Pneumatic butterfly valve 6 controls.Pipe arrangement 5, the middle pipe arrangement 4 of cooling water are put manual ball valve 13, manual ball valve 12 or flow control valve in the middle of the compressed air, are convenient to control flow and maintenance usefulness.If need automatically control, manual ball valve then need escalate into flow control valve, but cost increases relatively.
3) gas-vapor mix forms the cooling aerosol: utilize the water smoke cooling more even, and can not form ponding on the rolled piece surface, finished product shaped steel non-corroding phenomenon occurs, and mechanical performance index can change hardly.Cooling water pipeline 8 is connected with nozzle 1 with the terminal water sprayer tube 2 gentle showers 3 that link to each other of compressed air piping 9 branch roads, two showers are the row's medium pipeline that becomes welded together side by side, length is 5500mm, arranges the nozzle 1 of 8 air water atomizings on every row's medium pipeline.Described nozzle is comprised of cavity and shower nozzle, cavity has air cavity, water cavity and hybrid chamber, and air cavity, water cavity all are connected with hybrid chamber, and a diameter is the air cavity of 10mm, a diameter is the water cavity of 12mm, and air cavity and water cavity weld together with gas shower 3 and water sprayer tube 2 respectively.Another diameter is gas, the water hybrid chamber of 20mm, and gas, water hybrid chamber are positioned at directly over the air cavity, are threaded connection with shower nozzle.Described nozzle 1 is divided into two in the workpiece motion s direction to be arranged greatly, whenever arranges to put and arranges 21 groups of nozzles, 1, two row's interlaced arrangement, and nozzle 1 spacing is 760mm, and 380mm is opened in two misarrangements; Open first compressed air piping 9 valves and pass into compressed air, compressed air takes the lead in entering in the hybrid chamber by the air cavity of nozzle 1, then opens cooling water pipeline 8, and cooling water enters in the hybrid chamber by the water cavity by nozzle 1 subsequently.Compressed air forms the cooling aerosol with water atomizing in the gas of nozzle 1, water hybrid chamber.
4) aerosol sprays rolled piece and realizes cooling: by nozzle 1 ejection, nozzle 1 jet angle is 75 ° through the cooling aerosol that mixes in the step 3) hybrid chamber, and aerosol is sector shape and is injected in the rolled piece bottom like this, realize rolled piece evenly, cool off fast.
Be installed at the steel cold bed outlet side of H type steel production line by hot rolled H-shaped cold bed gas-mist cooling device of the invention process, mainly comprise cooling water pipeline 8 and compressed air piping 9, they pass through respectively 7 minutes seven groups of ends of Pneumatic butterfly valve 6 and pneumatic ball valve and supply with industry water and compressed-air actuated workshop industry water trunk line 10, workshop air trunk line continuous 11 connects, the other end is divided into three road arms, by the middle pipe arrangement 5 of pipe arrangement 4 in the middle of the cooling water and compressed air and 2 gentle 3 corresponding linking to each other of shower of water sprayer tube, establish manual ball valve 12 and manual ball valve 13 on the pipe arrangement 5 in the middle of pipe arrangement 4 and the compressed air in the middle of the cooling water, eight nozzles 1 be divided into one group be installed in side by side gas shower 3 and water sprayer tube on 2, to satisfy the requirement of the long rolled piece of evenly cooling.Nozzle 3 is arranged on cold bed below and jet hole towards rolled piece, and each nozzle is comprised of cavity and shower nozzle, and cavity has air cavity, water cavity and hybrid chamber, and air cavity, water cavity connect respectively gas shower 3 and water sprayer tube 2, and hybrid chamber is positioned at directly over the air cavity and with shower nozzle and is connected.
Above disclosed only is preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalence of therefore doing according to the present patent application claim changes, and still belongs to protection scope of the present invention.
Claims (12)
1. hot rolled H-shaped cold bed aerosol cooling method is characterized in that it comprises following step:
1) cooling water and compressed-air actuated preparation: the steel rolling water treatment system adds by water pump with Treatment of Industrial Water and after being cooled to supply water temperature and is sent to workshop industry water trunk line, and plant area's air compression station is handled compressed air well after the air compressor machine pressurization and delivered to the workshop air trunk line by plant area's pipe network;
2) cooling water and compressed-air actuated conveying: cooling water and compressed air are introduced from workshop industry water trunk line and workshop air trunk line respectively, be delivered to cold bed by cooling water pipeline and the compressed air piping of laying in advance respectively again, be provided with the valve of control break-make on cooling water pipeline and the compressed air piping;
3) gas-vapor mix forms the cooling aerosol: cooling water pipeline and compressed air piping end are connected with nozzle, open first the compressed air piping valve and pass into compressed air, the compressed air rate is introduced in the hybrid chamber of nozzle, then open cooling water pipeline, cooling water enters in the hybrid chamber of nozzle subsequently, and compressed air forms the cooling aerosol with cooling water atomizing in the gas of nozzle, water hybrid chamber;
4) aerosol sprays rolled piece realization cooling: the cooling aerosol of mixing is sprayed by nozzle, and aerosol is sector shape and is injected in the rolled piece bottom, realizes the cooling of rolled piece.
2. hot rolled H-shaped cold bed aerosol cooling method according to claim 1 is characterized in that: hydraulic pressure and compressed air pressure keep between 0.4MPa～0.6MPa in the described step 1), and the steel rolling water treatment system provides the stable industry water below 32 ℃.
3. hot rolled H-shaped cold bed aerosol cooling method according to claim 1, it is characterized in that: the cooling water pipeline of every cold bed and compressed air piping are respectively equipped with seven groups described step 2), the head end of cooling water pipeline links to each other with workshop industry water trunk line, and the head end of compressed air piping links to each other with the workshop air trunk line; The end of cooling water pipeline and compressed air piping is divided into three road arms, links to each other with shower separately by middle pipe arrangement, and shower connects described nozzle.
4. hot rolled H-shaped cold bed aerosol cooling method according to claim 1, it is characterized in that: the nozzle described in the described step 3) is comprised of cavity and shower nozzle, cavity has air cavity, water cavity and hybrid chamber, air cavity, water cavity all are connected with hybrid chamber, water cavity, air cavity connect respectively cooling water pipeline and compressed air piping, and hybrid chamber is positioned at directly over the air cavity and with shower nozzle and is connected.
5. hot rolled H-shaped cold bed aerosol cooling method according to claim 1, it is characterized in that: the jet angle of nozzle described in the described step 3) is 75 °.
6. hot rolled H-shaped cold bed aerosol cooling method according to claim 3, it is characterized in that: described every group of shower is provided with eight nozzles, and the distance of the lower surface of nozzle and cold bed static rack is 90mm.
7. hot rolled H-shaped cold bed aerosol cooling method according to claim 3 is characterized in that: establish manual ball valve or flow control valve on the pipe arrangement in the middle of described.
8. hot rolled H-shaped cold bed gas-mist cooling device as claimed in claim 1, it is characterized in that: it includes cooling water pipeline and compressed air piping, is equipped with the valve of control break-make on cooling water pipeline and the compressed air piping; The cooling water pipeline head end connects workshop industry water trunk line, workshop industry water trunk line connects the steel rolling water treatment system and introduces cooling processing and the industry water after the water pump pressurization, the compressed air piping head end connects the workshop air trunk line, and the workshop air trunk line connects the compressed air of plant area's pipe network introducing after the air compressor machine pressurization; Cooling water pipeline is connected end and is all connected nozzle with compressed air piping, nozzle is arranged on cold bed below and jet hole towards rolled piece, each nozzle is comprised of cavity and shower nozzle, cavity has air cavity, water cavity and hybrid chamber, air cavity, water cavity connect respectively compressed air piping and cooling water pipeline, and hybrid chamber is positioned at directly over the air cavity and with shower nozzle and is connected.
9. hot rolled H-shaped cold bed gas-mist cooling device according to claim 8, it is characterized in that: the cooling water pipeline of described every cold bed and compressed air piping have seven groups, the head end of cooling water pipeline links to each other with workshop industry water trunk line, and the head end of compressed air piping links to each other with the workshop air trunk line; The end of cooling water pipeline and compressed air piping is divided into three road arms, links to each other with shower separately by middle pipe arrangement, and shower connects described nozzle.
10. hot rolled H-shaped cold bed gas-mist cooling device according to claim 8, it is characterized in that: the jet angle of described nozzle is 75 °.
11. hot rolled H-shaped cold bed gas-mist cooling device according to claim 9 is characterized in that: described every group of shower is provided with eight nozzles, the distance of the lower surface of nozzle and cold bed static rack is 90mm.
12. hot rolled H-shaped cold bed gas-mist cooling device according to claim 9 is characterized in that: establish manual ball valve or flow control valve on the pipe arrangement in the middle of described.
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| CN201310264194.1A CN103357675B (en) | 2013-06-28 | 2013-06-28 | Hot rolled H-shaped cold bed aerosol cooling method and device thereof |
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| CN201310264194.1A CN103357675B (en) | 2013-06-28 | 2013-06-28 | Hot rolled H-shaped cold bed aerosol cooling method and device thereof |
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Cited By (3)
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| CN105798071A (en) * | 2016-05-26 | 2016-07-27 | 中冶南方工程技术有限公司 | Online cooling device of profile steel rolling mill |
| CN109092915A (en) * | 2018-08-31 | 2018-12-28 | 鞍钢重型机械有限责任公司 | A kind of asymmetric deformed steel water mist cooling apparatus and method |
| CN110144442A (en) * | 2019-06-13 | 2019-08-20 | 范淼森 | A water quenching device for the heat treatment of high speed hot rolling finer wire |
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| CN109092915B (en) * | 2018-08-31 | 2024-05-10 | 鞍钢重型机械有限责任公司 | Asymmetric deformed steel water mist cooling device and method |
| CN110144442A (en) * | 2019-06-13 | 2019-08-20 | 范淼森 | A water quenching device for the heat treatment of high speed hot rolling finer wire |
| CN110144442B (en) * | 2019-06-13 | 2024-01-19 | 范淼森 | Water quenching device for heat treatment of high-speed hot-rolled thin steel wire |
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| CN103357675B (en) | 2016-06-29 |
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