CN101762364B - Airtightness testing method of ultra-long anneal furnace - Google Patents

Airtightness testing method of ultra-long anneal furnace Download PDF

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Publication number
CN101762364B
CN101762364B CN2008102037240A CN200810203724A CN101762364B CN 101762364 B CN101762364 B CN 101762364B CN 2008102037240 A CN2008102037240 A CN 2008102037240A CN 200810203724 A CN200810203724 A CN 200810203724A CN 101762364 B CN101762364 B CN 101762364B
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furnace
furnace shell
equipment
assembled
stove
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CN101762364A (en
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陈红武
毛家福
林绥红
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MCC5 Group Shanghai Corp Ltd
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MCC5 Group Shanghai Corp Ltd
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Abstract

The invention relates to the air tightness testing field in smelting field, in particular to an air tightness testing method of an ultra-long anneal furnace, which comprises the following steps of: detecting the welding quality of a furnace shell; controlling the mounting equipment integrity; controlling the on-site assembly of the furnace and the connected auxiliary equipment; and detecting maximum safety pressure leakage. The method is characterized in that when the welding quality of the furnace shell is detected, a 100 percent coal oil leakage test is carried out on a welding line, and anautomatic welding technology by a robot is adopted; and when the maximum safety pressure leakage is detected, the furnace body is mounted and filled with the maximum pressure of 12mbar for detecting leakage. The invention can greatly shorten the testing time and improve the production efficiency.

Description

Airtightness testing method of ultra-long anneal furnace
Technical field
The present invention relates to the sealing property field tests of field of smelting, be specially a kind of airtightness testing method of ultra-long anneal furnace.
Background technology
The silicon steel production line is modern cold-strip steel deep processing combined production line, is the most significant end product of representing in the cold-rolled products, is the project that modern large-scale iron and steel enterprise enhances competitiveness.This combined production line requires high for the continuous annealing of band steel, annealing furnace related process parameter control is the key factor of decision product quality, therefore it is most important that whether quality, especially its sealing property of its annealing furnace quality satisfy band steel manufacturing technique requirent.At present still do not have concrete systematic study, therefore lack the theoretical data and the practical operation method of comparatively practical and minimum test duration yet for the annealing furnace air-tight test.
Summary of the invention
In order to overcome the defective of prior art, make a continuous annealing furnace airtightness testing method that is rich in work efficiency, the invention discloses a kind of airtightness testing method of ultra-long anneal furnace.
The present invention reaches goal of the invention by following technical solution:
A kind of airtightness testing method of ultra-long anneal furnace comprises integrity control, the assembled on site control of stove connection auxiliary device, the leak detection of maximum safety pressure power that furnace shell Weld Quality Inspection, equipment are installed, it is characterized in that:
During the furnace shell Weld Quality Inspection, butt welded seam carries out 100% kerosene permeability test, adopts the robot automatic welding technique;
During integrity control that equipment is installed: the plant equipment of confirming to be connected with annealing furnace, craft piping, instrument etc. all install, and install after not leaving over furnace shell join dependency equipment;
When stove connected the assembled on site of auxiliary device: flange and short tube linkage section were assembled welding at the scene, and the furnace shell body is behind the scene, and the centering in place and fixing of going ahead of the rest is assembled each connecting interface of welding body of heater then;
During the leak detection of maximum safety pressure power: after the body of heater installation, be that 12mbar carries out pressurising leak detection in the stove with maximum allowble pressure in the stove.
Air-tight test technology of the present invention can be suitable for the air-tight test operation of all continuous annealing furnaces, tests according to this technology, can reach the effect of getting twice the result with half the effort.Original plan takes 1 month even more time just can be finished test, adopts method of the present invention, has only just finished the air-tight test requirement with 3.5 days time for horizontal annealing furnace, and furnace pressure is from 50mmH 2O is to 15mmH 2O reaches 36 minutes, and vertical annealing furnace is only with just reaching requirement in 11 days.
Embodiment
Below further specify the present invention by specific embodiment.
Embodiment 1
A kind of airtightness testing method of ultra-long anneal furnace comprises integrity control, the assembled on site control of stove connection auxiliary device, the leak detection of maximum safety pressure power that furnace shell Weld Quality Inspection, equipment are installed, and concrete steps are:
1. during the furnace shell Weld Quality Inspection: general furnace shell hull plate all is to assemble with 6mm carbon structural steel plate to be welded, the furnace shell weld seam divides to be made and field joint, the weldquality of its welding whether 100% qualified will be that the most important condition that can the back air-tight test carry out fast is installed, therefore, adopt the owner to live that factory supervises during the making and system such as device A inspection, it is made weld seam carry out 100% kerosene permeability test, the qualified work efficiency that has just improved the air-tight test in later stage of weldquality like this.Between installation period, furnace shell has formed long straight bead, adopt robot automatic welding technique control weldquality: promptly carry out the welding of furnace shell straight bead with the rectilinear orbit welding robot, speed is fast, appearance of weld is good, even weld, no slag inclusion, pore, overlap, this is to guarantee the bubble-tight key point of body of heater.
Equipment install integrity control the time: the plant equipment of confirming to be connected with annealing furnace, craft piping, instrument etc. all install, install after must not leaving over furnace shell join dependency equipment, otherwise, back erecting equipment often influences product quality owing to do not carry out air-tight test with the body of heater one during production.
3. when stove connected the assembled on site control of auxiliary device: maximum equipment was the equipment of flange-interface on the body of heater, as furnace roller flange, radiant tube flange, temperature measuring instrument flange, body of heater atmosphere measuring instrument flange, furnace pressure measuring instrument flange, various medium pipeline joint flanges etc., the flatness of its flange port, levelness and verticality are installed most important to equipment, also be simultaneously the key point of air-tight test control.From in the past through examining, especially furnace roller flange, radiant tube flange, these flanges are when factory and furnace shell welding, flange face is very difficult to verticality control in length and breadth, overwhelming majority flange is all overproof, and the furnace roller in later stage and radiant tube are had relatively high expectations because of installation accuracy, often can't satisfy.Be to guarantee precision, flange and short tube linkage section need to revise at the scene comprehensively, have a strong impact on project progress, and for this reason, we require manufacturing plant to these interfaces by owner unit, with the loose mail form scene of delivering, are welded by assembled on site.The furnace shell body is behind the scene, and the centering in place and fixing of going ahead of the rest is assembled each connecting interface of welding body of heater then.
4. when maximum safety pressure power was hunted leak: after the body of heater installation, adopting ideal leak detection mode also was the factor of decision test period.In our experience, the annealing furnace of 6mm hull plate does not deform for guaranteeing the pressurising rear furnace body, and maximum allowble pressure is 12mbar, i.e. 120mmH in the stove 2O, it is the most effective carrying out in the stove pressurising leak detection according to this pressure, is very easy to find leakage point under this pressure, otherwise hunting leak under low-pressure to be difficult to find that leak source, work efficiency are difficult to guarantee.

Claims (1)

1. an airtightness testing method of ultra-long anneal furnace comprises integrity control, the assembled on site control of stove connection auxiliary device, the leak detection of maximum safety pressure power that furnace shell Weld Quality Inspection, equipment are installed, it is characterized in that:
During the furnace shell Weld Quality Inspection, butt welded seam carries out 100% kerosene permeability test, adopts the robot automatic welding technique;
During integrity control that equipment is installed: confirm that the plant equipment, craft piping, the instrument that are connected with annealing furnace all install, install after not leaving over furnace shell join dependency equipment;
When stove connected the assembled on site of auxiliary device: flange and short tube linkage section were assembled welding at the scene, and the furnace shell body is behind the scene, and the centering in place and fixing of going ahead of the rest is assembled each connecting interface of welding body of heater then,
During the leak detection of maximum safety pressure power: after the body of heater installation, be that 12mbar carries out pressurising leak detection in the stove with maximum allowble pressure in the stove.
CN2008102037240A 2008-11-28 2008-11-28 Airtightness testing method of ultra-long anneal furnace Active CN101762364B (en)

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CN101762364B true CN101762364B (en) 2011-08-03

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102445313B (en) * 2010-10-11 2015-08-12 五冶集团上海有限公司 Coke oven heating gas pipeline pressure testing device and method
CN102692327B (en) * 2011-03-22 2014-06-18 上海宝钢设备检修有限公司 A method for a comprehensive test of key equipments of a smelting-reduction iron making furnace
CN102954862B (en) * 2011-08-29 2015-09-30 宝钢特钢有限公司 The pick-up unit of the furnace body leakage of continous way hydrogen shield annealing furnace and detection method
CN103512711B (en) * 2012-06-20 2016-01-20 五冶集团上海有限公司 Normalizing annealing stove airtightness testing method
CN103572010B (en) * 2012-07-24 2015-03-04 五冶集团上海有限公司 Method for preventing furnace rollers from deformation caused by heating during furnace-baking period
CN107543659A (en) * 2016-06-28 2018-01-05 五冶集团上海有限公司 Vertical annealing furnace airtightness testing method
CN109000856B (en) * 2018-07-28 2020-09-11 上海二十冶建设有限公司 Air-tight test method for sectional leak detection and integral pressure test
CN111912573A (en) * 2020-07-09 2020-11-10 首钢京唐钢铁联合有限责任公司 Annealing furnace body air tightness detection method

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CN1084220A (en) * 1992-09-08 1994-03-23 华东冶金学院 Method for detecting leakage of blast furnace soft water sealed circulation cooling system
EP0663587A2 (en) * 1994-01-18 1995-07-19 THE BABCOCK & WILCOX COMPANY Acoustic emission signal collectors
CN2253829Y (en) * 1995-09-08 1997-05-07 东北电力学院 On-line monitoring instrument for leakage of boiler pressure-bearing pipe
CN2733331Y (en) * 2004-08-13 2005-10-12 南京国泰电力技术有限公司 Boiler steam pipe state detection and leakage alarm device

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
CN1084220A (en) * 1992-09-08 1994-03-23 华东冶金学院 Method for detecting leakage of blast furnace soft water sealed circulation cooling system
EP0663587A2 (en) * 1994-01-18 1995-07-19 THE BABCOCK & WILCOX COMPANY Acoustic emission signal collectors
CN2253829Y (en) * 1995-09-08 1997-05-07 东北电力学院 On-line monitoring instrument for leakage of boiler pressure-bearing pipe
CN2733331Y (en) * 2004-08-13 2005-10-12 南京国泰电力技术有限公司 Boiler steam pipe state detection and leakage alarm device

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