CN103512711B - Normalizing annealing stove airtightness testing method - Google Patents
Normalizing annealing stove airtightness testing method Download PDFInfo
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- CN103512711B CN103512711B CN201210203941.6A CN201210203941A CN103512711B CN 103512711 B CN103512711 B CN 103512711B CN 201210203941 A CN201210203941 A CN 201210203941A CN 103512711 B CN103512711 B CN 103512711B
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Abstract
A kind of normalizing annealing stove airtightness testing method; it is characterized in that comprising the following steps: the preliminary work before a normalizing annealing furnace gas tightness test; b normalizing annealing furnace gas tightness test carries out segmentation; c leading portion normalizing annealing furnace gas tightness test and d back segment normalizing annealing furnace gas tightness test; wherein: in described step c and d, carry out leading portion normalizing annealing furnace gas tightness test and back segment normalizing annealing furnace gas tightness test simultaneously.Normalizing annealing stove airtightness testing method of the present invention has and is divided into two sections, front and back and carries out air-tight test, the advantage of accelerating construction progress and reduction of erection time simultaneously.
Description
Technical field
The present invention relates to a kind of airtightness testing method, specifically, is a kind of normalizing annealing stove airtightness testing method.
Background technology
The bubble-tight quality of annealing furnace is huge on strip quality impact, and improve impermeability and can improve strip quality greatly, add hydrogen in stove, impermeability is bad very easily causes security incident, therefore impermeability requires high.But known annealing furnace airtightness testing method finds slow to the leak source of annealing furnace, the cycle of air-tight test is long, time-consuming, is obviously not suitable for whole project progress requirement when duration anxiety.
Therefore known annealing furnace airtightness testing method also exists above-mentioned all inconvenience and problem.
Summary of the invention
Object of the present invention, is to propose a kind of length shortening annealing furnace air-tight test, can find leak source and the normalizing annealing stove airtightness testing method significantly improving the cycle of doing experiment sooner.
For achieving the above object, technical solution of the present invention is:
A kind of normalizing annealing stove airtightness testing method, is characterized in that comprising the following steps:
Preliminary work before a, normalizing annealing furnace gas tightness test, comprises following steps:
(1) inspection of furnace expansion roller, replacing
Annealing furnace measure expansion roller has the factor of expansion due to the impact that is stressed, and the situation of its installation site and installation is checked comprehensively, remove provisional safeguard measure, carry out inspection record, clear up base plate for annealing furnace simultaneously before air-tight test;
(2) protection annealing body of heater instrument pressure parts
Pressure parts in protective demolition annealing body of heater instrument, and properly preserve; Shutoff is carried out, with it-plate or sealant sealing between steel plate and flange with steel plate;
(3) vent port on body of heater and osculum is sealed
Smear thick white paint with raw material band and seal vent port on all bodies of heater and osculum;
(4) furnace roller is sealed
Furnace roller is sealed with the blind flange of interim sheet asbestos and making; Furnace roller installing plate tightly welds with inside furnace shell tapping, and outside surrounding carries out spending solid welding fixed;
(5) furnace shell inlet chamber is sealed
With the Plate Welding sealing furnace shell inlet chamber of 8mm;
(6) PH/NOF fire grate smoke pipeline and body of heater connector is sealed
Blind flange sealing PH/NOF fire grate smoke pipeline and body of heater connector is made with 12mm steel plate;
(7) PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is sealed
Blind flange sealing PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is made with 12mm steel plate;
(8) 2# furnace throat top is sealed
With 5mm Plate Welding sealing 2# furnace throat top;
(9) valve-off
Close on-site sampling hole and various medium access apertures leading portion valve, if valveless, then carry out shutoff at flange blank off; Close the connection valve of whole pipeline and equipment room, the blind plate shutoff of PH/NOF blast main valve place, PH/NOF igniter burner is removed and is used plug shutoff;
(10) furnace shell internal cleaning, close
All furnace rollers and radiant tube all install before air-tight test, and furnace shell internal cleaning is clean, provision for sealing manhole and peep-hole;
(11) shutoff 2# furnace throat front end
With 8mm steel plate by the welding shutoff of 2# furnace throat front end;
B, normalizing annealing furnace gas tightness test carry out segmentation
Seal between NOF section and 2# furnace throat, make normalizing annealing furnace gas tightness test be divided into before and after inlet seal room to NOF section and 2# furnace throat to water jacket section two sections;
C, leading portion normalizing annealing furnace gas tightness test
Carry out leading portion inlet seal room to NOF section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, after reaching specified testing pressure, pressurize is no less than 30 minutes, then design pressure is down to, leak detection pressure is 1200Pa, and furnace pressure is timing from 800Pa, and pressurize half an hour is down to more than 350Pa for qualified;
D, back segment normalizing annealing furnace gas tightness test
Carry out back segment 2# furnace throat to water jacket section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, after reaching specified testing pressure, pressurize is no less than 30 minutes, then design pressure is down to, leak detection pressure is 1200Pa, and furnace pressure timing pressurize half an hour from 800Pa is down to more than 350Pa for pressurize success; Or when furnace pressure continues to decline, if when dropping to 60Pa, keeping half an hour not decline, is also qualified;
Wherein: in described step c and d, carry out leading portion normalizing annealing furnace gas tightness test and back segment normalizing annealing furnace gas tightness test simultaneously.
After adopting technique scheme, normalizing annealing stove airtightness testing method of the present invention has the following advantages:
1, shorten the length of annealing furnace air-tight test, can find faster leak source, the cycle of doing air-tight test can be significantly improved;
2, be divided into two sections, front and back and carry out air-tight test, accelerating construction progress, reduction of erection time simultaneously.
Accompanying drawing explanation
Fig. 1 is normalizing annealing furnace gas tightness test schematic flow sheet of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing thereof, the present invention is illustrated further.
Normalizing annealing stove airtightness testing method of the present invention, is characterized in that comprising the following steps:
Preliminary work before a, normalizing annealing furnace gas tightness test, comprises following steps:
(1) inspection of furnace expansion roller, replacing
Annealing furnace measure expansion roller has the factor of expansion due to the impact that is stressed, and the situation of its installation site and installation is checked comprehensively, remove provisional safeguard measure, carry out inspection record, clear up base plate for annealing furnace simultaneously before air-tight test;
(2) protection annealing body of heater instrument pressure parts
Pressure parts in protective demolition annealing body of heater instrument, and properly preserve; Shutoff is carried out, with it-plate or sealant sealing between steel plate and flange with steel plate;
(3) vent port on body of heater and osculum is sealed
Smear thick white paint with raw material band and seal vent port on all bodies of heater and osculum;
(4) furnace roller is sealed
Furnace roller is sealed with the blind flange of interim sheet asbestos and making; Furnace roller installing plate tightly welds with inside furnace shell tapping, and outside surrounding carries out spending solid welding fixed;
(5) furnace shell inlet chamber is sealed
With the Plate Welding sealing furnace shell inlet chamber of 8mm;
(6) PH/NOF fire grate smoke pipeline and body of heater connector is sealed
Blind flange sealing PH/NOF fire grate smoke pipeline and body of heater connector is made with 12mm steel plate;
(7) PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is sealed
Blind flange sealing PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is made with 12mm steel plate;
(8) 2# furnace throat top is sealed
With 5mm Plate Welding sealing 2# furnace throat top;
(9) valve-off
Close on-site sampling hole and various medium access apertures leading portion valve, if valveless, then carry out shutoff at flange blank off; Close the connection valve of whole pipeline and equipment room, the blind plate shutoff of PH/NOF blast main valve place, PH/NOF igniter burner is removed and is used plug shutoff;
(10) furnace shell internal cleaning, close
All furnace rollers and radiant tube all install before air-tight test, and furnace shell internal cleaning is clean, provision for sealing manhole and peep-hole;
(11) shutoff 2# furnace throat front end
With 8mm steel plate by the welding shutoff of 2# furnace throat front end;
B, normalizing annealing furnace gas tightness test carry out segmentation
Seal between NOF section and 2# furnace throat, make normalizing annealing furnace gas tightness test be divided into before and after inlet seal room to NOF section and 2# furnace throat to water jacket section two sections;
C, leading portion normalizing annealing furnace gas tightness test
Carry out leading portion inlet seal room to NOF section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, after reaching specified testing pressure, pressurize is no less than 30 minutes, then design pressure is down to, leak detection pressure is 1200Pa, and furnace pressure is timing from 800Pa, and pressurize half an hour is down to more than 350Pa for qualified;
D, back segment normalizing annealing furnace gas tightness test
Carry out back segment 2# furnace throat to water jacket section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, after reaching specified testing pressure, pressurize is no less than 30 minutes, then design pressure is down to, leak detection pressure is 1200Pa, and furnace pressure timing pressurize half an hour from 800Pa is down to more than 350Pa for pressurize success; Or when furnace pressure continues to decline, if when dropping to 60Pa, keeping half an hour not decline, is also qualified;
Wherein: in described step c and d, carry out leading portion normalizing annealing furnace gas tightness test and back segment normalizing annealing furnace gas tightness test simultaneously.
Normalizing annealing furnace gas tightness test is divided into two parts by normalizing annealing stove airtightness testing method of the present invention, carries out leading portion normalizing annealing furnace gas tightness test and back segment normalizing annealing furnace gas tightness test, accelerating construction progress, reduction of erection time simultaneously.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or change.Therefore, all equivalent technical schemes also should belong to category of the present invention, should be limited by each claim.
Claims (1)
1. a normalizing annealing stove airtightness testing method, is characterized in that comprising the following steps:
Preliminary work before a, normalizing annealing furnace gas tightness test, comprises following steps:
(1) inspection of furnace expansion roller, replacing
Annealing furnace measure expansion roller has the factor of expansion due to the impact that is stressed, and the situation of its installation site and installation is checked comprehensively, remove provisional safeguard measure, carry out inspection record, clear up base plate for annealing furnace simultaneously before air-tight test;
(2) protection annealing body of heater instrument pressure parts
Pressure parts in protective demolition annealing body of heater instrument, and properly preserve; Shutoff is carried out, with it-plate or sealant sealing between steel plate and flange with steel plate;
(3) vent port on body of heater and osculum is sealed
Smear thick white paint with raw material band and seal vent port on all bodies of heater and osculum;
(4) furnace roller is sealed
Furnace roller is sealed with the blind flange of interim sheet asbestos and making; Furnace roller installing plate tightly welds with inside furnace shell tapping, and outside surrounding carries out spending solid welding fixed;
(5) furnace shell inlet chamber is sealed
With the Plate Welding sealing furnace shell inlet chamber of 8mm;
(6) PH/NOF fire grate smoke pipeline and body of heater connector is sealed
Blind flange sealing PH/NOF fire grate smoke pipeline and body of heater connector is made with 12mm steel plate;
(7) PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is sealed
Blind flange sealing PH/NOF stove controling of the pressure of the oven baffle plate and body of heater connector is made with 12mm steel plate;
(8) 2# furnace throat top is sealed
With 5mm Plate Welding sealing 2# furnace throat top;
(9) valve-off
Close on-site sampling hole and various medium access apertures leading portion valve, if valveless, then carry out shutoff at flange blank off; Close the connection valve of whole pipeline and equipment room, the place's blind plate shutoff of PH/NOF stove blast main valve, PH/NOF furnace igniting burner is removed and is used plug shutoff;
(10) furnace shell internal cleaning, close
All furnace rollers and radiant tube all install before air-tight test, and furnace shell internal cleaning is clean, provision for sealing manhole and peep-hole;
(11) shutoff 2# furnace throat front end
With 8mm steel plate by the welding shutoff of 2# furnace throat front end;
B, normalizing annealing furnace gas tightness test carry out segmentation
Seal between NOF section and 2# furnace throat, make normalizing annealing furnace gas tightness test be divided into before and after inlet seal room to NOF section and 2# furnace throat to water jacket section two sections;
C, leading portion normalizing annealing furnace gas tightness test
Carry out leading portion inlet seal room to NOF section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, and after reaching specified testing pressure, pressurize is no less than 30 minutes, is then down to design pressure; Leak detection original pressure is 1200Pa, and original pressure of then hunting leak starts to decline, and starts timing when furnace pressure reaches 800Pa, and pressurize half an hour is down to more than 350Pa for qualified;
D, back segment normalizing annealing furnace gas tightness test
Carry out back segment 2# furnace throat to water jacket section normalizing annealing furnace gas tightness test, pass into test(ing) medium drying, clean air, during test, pressure should slowly rise, after reaching specified testing pressure, pressurize is no less than 30 minutes, then design pressure is down to, leak detection pressure is 1200Pa, and furnace pressure timing pressurize half an hour from 800Pa is down to more than 350Pa for pressurize success; Or when furnace pressure continues to decline, if when dropping to 60Pa, keeping half an hour not decline, is also qualified;
Wherein: in described step c and d, carry out leading portion normalizing annealing furnace gas tightness test and back segment normalizing annealing furnace gas tightness test simultaneously.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107543659A (en) * | 2016-06-28 | 2018-01-05 | 五冶集团上海有限公司 | Vertical annealing furnace airtightness testing method |
| CN107560793B (en) * | 2017-07-28 | 2019-09-13 | 中国二十冶集团有限公司 | The jump storehouse formula air-tight test construction method of continuous annealing furnace |
| 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 |
| CN110160708B (en) * | 2019-03-29 | 2021-09-10 | 宁波宝新不锈钢有限公司 | Automatic detection method applied to muffle furnace hydrogen leakage |
| CN111609970B (en) * | 2020-05-29 | 2022-04-26 | 马鞍山马钢华阳设备诊断工程有限公司 | Airtightness detection method for hot galvanizing vertical annealing furnace under production working condition |
| CN111912573B (en) * | 2020-07-09 | 2022-10-04 | 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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| JP2005061999A (en) * | 2003-08-12 | 2005-03-10 | Seiko Epson Corp | Airtightness testing method and device |
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