CN109000856A - A kind of air seal test method being segmented leak detection, whole pressure testing - Google Patents
A kind of air seal test method being segmented leak detection, whole pressure testing Download PDFInfo
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- CN109000856A CN109000856A CN201810850623.6A CN201810850623A CN109000856A CN 109000856 A CN109000856 A CN 109000856A CN 201810850623 A CN201810850623 A CN 201810850623A CN 109000856 A CN109000856 A CN 109000856A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/12—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing elastic covers or coatings, e.g. soapy water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
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- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
Specifically a kind of segmentation leak detection of the present invention, whole pressure testing air seal test method it is characterized in that: including reserving not install into, outlet envelope room, furnace throat in furnace shell installation process；Airtight experimental technique segmentation is divided, airtight closure is carried out to each segmentation；Gradually it is connected to whole pressure testing；Burner typical leak point analysis and airtight close measure；Roller mounting plate typical leak point analysis and airtight close measure.Procedure connection is close in the scheduling of this test method, equipment installation builds efficiently interspersed construction with resistance to material, greatly improve air seal test efficiency, air seal test is synchronously completed when resistance to material builds and completes, the equipment set-up time is shortened, for the piping of subsequent furnace body, furnace roller is zero load, and the time has been striven in linkage debugging.
Description
Technical field
The present invention relates to annealing furnace preservation & testing field, specifically a kind of air seal test method for being segmented leak detection, whole pressure testing.
Background technique
Silicon steel continuous annealing formula is a kind of horizontal continuous annealing industrial furnace, and continuous annealing furnace length is generally in 200m-300m
Between, when integral experiment is taken in air seal test, the larger each long pressure rising of inflationtime of furnace volume is slow, pressure in the burner hearth is small
Cause leakage point leakage rate small, sprinkling suds leakage detection effect it is unobvious, to leakage point repair welding, plus glue sealing after, it is reinflated
Furnace pressure promotion speed is slow in the process, and leak detection efficiency is lower.Various its processing performance of furnace section of silicon steel continuous annealing furnace, the internal knot of resistance to material
Configuration formula is different, is related to the plurality of specifications refractory materials such as high alumina brick masonry, fiber backboard, fibre module, stainless steel liner plate, due to
Construction technology, construction speed are also inconsistent.The construction of some furnace sections is completed fast, some furnace sections and is completed slowly, especially before air seal test
RTF radiant tube need to be installed in the furnace shell that resistance to material is laid, and shell requires all to be fully welded with furnace shell.SF resistance band binding post need to be to
Resistance to material, which has been built, to be held Kong Houcai successfully and has mounting condition.Taking also needs several talentes after the completion of resistance to material is built when whole air seal test
It can be transferred to air seal test, various processes can not be overlapped effectively, be interted, and for the compression key process construction time, shortening is installed into
It spends extremely disadvantageous.
Summary of the invention
The purpose of the present invention is to provide a kind of detection efficiency height, it is not take up the master operation time, accelerates equipment installation progress,
For the piping of subsequent furnace body, furnace roller is zero load, and the air tight test method to create conditions is debugged in linkage.
To achieve the above object, the present invention is implemented as follows:
A kind of air seal test method being segmented leak detection, whole pressure testing, including
Reserved in step 1, furnace shell installation process into, outlet envelope room, furnace throat do not install: first uneasy loading port sealing when furnace shell is installed
Room, exit seal room, furnace throat；Enter, exit seal room setting nitrogen jet sealing device is not involved in air-tight test, furnace throat design
There is 1-2 furnace roller mounting hole in short and small side, and the installation of plate temperature meter and correction hole are arranged at top, gradually connects after the completion of furnace shell segmentation leak detection
Pressure test leak-detecting when logical, furnace throat reserved empty position is as the building construction of resistance to material material, the access way of personnel；
Step 2 divides airtight experimental technique segmentation, carries out airtight closure to each segmentation:
Step 2.1, RJC control cooling section carry out air seal test as a segmentation, carry out resistance to material due to being not required to scene inside it
It building, can carry out air seal test detection after being installed, RJC controls cooling section and controls cooling section by SRJC, RRJC rapid cooling section,
And 1 furnace throat connection, RJC control cooling section furnace pressure highest in continuous annealing furnace normal productive process, are passed through nitrogen therein
Important to whole unit control climate to use, RJC controls cooling segment length between 50m-60m, and section length is appropriate for
Airtight experiment；
Step 2.2, CTF radiant tube cooling section carry out air seal test as a segmentation, because its internal resistance to material adds for fibre module
The design of stainless steel lining plate structure, furnace segment length is in 20m, and completing resistance to material, to build the time very fast, but furnace section is too short does not have segmentation examination
Condition is tested, arrangement carries out airtight experiment together with SF resistance band heating furnace；
Step 2.3, SF resistance band heating furnace carry out air seal test as segmentation, furnace bottom by fire resisting brick masonry at resistance
With groove, side wall and furnace roof are fiber backboard and fibre module, and resistance to material construction is very fast, after the bottom resistance band preformed hole of resistance to material is held successfully
Airtight experiment can be carried out by installing resistance band binding post, and SF resistance band heating furnace, 80 meters of furnace body sections of furnace superintendent are small to add CTF furnace 20
100 meters of meter Gong Ji are suitable as a segmentation and carry out air seal test；
Step 2.4, RTF radiant tube heating furnace carry out air seal test as a segmentation, and bottom and side wall are refractory brick, top
Portion is fibre module structure, and the masonry time is slower, also needs installation W type radiant tube after the completion, and flange can carry out after being all fully welded
Air seal test, RTF furnace length are suitable as segmentation and carry out air seal test 46 meters of section of burner hearth are larger；
Step 2.5, PH/NOF preheating non-oxidation furnace carry out air seal test, the resistance to all refractory brick of material structure as a segmentation
Design, furnace roller brick, burner block, vault brick masonry difficulty are big, and the time is slow, and PH/NOF furnace length is larger suitable in 50 meters of section of burner hearth
Air seal test is carried out as a segmentation；
Step 3 is gradually connected to whole pressure testing: after the completion of segmentation leak detection, each section of furnace throat in place, PH/NOF preheats non-oxidation furnace, RTF
Radiant tube heating furnace, SF resistance band heating furnace, CTF radiant tube cooling section, above 4 sections of furnace shells connect integral progress air-tightness examination
It tests；RJC control cooling section will not wherein carry out air-tight test in access；
Step 4, burner typical leak point analysis and airtight close measure: PH/NOF preheats the more burners of non-oxidation furnace burner leakage point
With furnace shell flange connection surface using asbestos washer encryption sealing sealing, sealant be applied to connection bolt on the inside of, prevent gas from
It is bolted place's leakage, pipe interface flange joint face production 6mm steel plate does blind plate and places between the flanges and smear sealant
Sealing, igniter burner are removed, and internal thread nozzle adds raw material band to block using plug, and external fiber tube mouth adds raw material band to seal using pipe cap
It is stifled；
Step 5, furnace roller mounting plate typical leak point analysis and airtight close measure: it is fully welded on the inside of furnace roller mounting plate with furnace shell, furnace
Furnace roller mounting plate is determined with the section solid welding of furnace shell quadrangle on the outside of roller mounting plate, and furnace roller installation is installed between furnace roller mounting plate and bearing block for furnace roller
Plate blocks blind plate, and blind plate smearing sealant is pressed on furnace roller mounting plate by bearing block for furnace roller plays sealing function.
This air tight test method rationally carries out furnace shell compared with traditional whole air seal test method, according to on-site actual situations
Science segmentation, air seal test are punctured into during the building construction of resistance to material, are greatly improved air seal test efficiency, have been built in resistance to material
Cheng Shike synchronously completes air seal test, is not take up the master operation time, shortens the equipment set-up time, for furnace body piping, furnace roller without
The expansion in advance of load linkage debugging creates condition.
Detailed description of the invention
Fig. 1 is each section of furnace shell arrangement schematic diagram of continuous annealing furnace.
Fig. 2 is PH/NOF preheating section non-oxidation furnace typical component schematic diagram.
Fig. 3 is RTF radiant tube heating furnace typical component schematic diagram.
Fig. 4 is SF resistance band heating furnace typical component schematic diagram.
Fig. 5 is that SRJC, RRJC control cooling furnace typical component schematic diagram.
Fig. 6 is segmentation furnace shell leak detection schematic diagram.
Fig. 7 is that segmentation furnace shell is gradually connected to whole pressure testing schematic diagram.
Fig. 8 is each block diagram of typical leak point analysis burner.
Fig. 9 is each block diagram of typical leak point analysis furnace roller mounting plate.
In figure: 1 PH/NOF preheats non-oxidation furnace, 2 RTF radiant tube heating furnaces, 3 SF resistance band heating furnaces, 4 CTF spokes
Penetrating pipe cooling section, 5 SRJC control cooling section, 6 RRJC rapid cooling sections, 7 furnace throats, 8 inlet seal rooms, 9 exit seal rooms, and 10
Entrance sealing plate, 11 flue sealing plates, 12 controling of the pressure of the oven baffle sealing plates, 13 burners, 14 outlet sealing plates, 15 furnace roller mounting plates, 16
Sampling hole bump joint, 17 expansion joints, 18 thermocouple holes, 19 manholes, 20 radiation pipe burner tips, 21 electrode terminals, 22
Gaseous mixture is filled with and bottom discharge mouth nipple, 23 circulating fans, 24 plenum chambers, 25 water coolers, 26 circulation air paths,
27 inlet compression air input points, 28 outlet compressed air input points, 29 entrance kpa pressure tables, 30 middle part kpa pressures
Table, 31 outlet kpa pressure tables, 32 entrance difference gauges, 33 middle part difference gauges, 34 outlet difference gauges, 35 burners and furnace shell
Flange connection surface, 36 pipe interface flange joint faces, 37 igniter burners, 38 external fiber tube mouths, on the inside of 39 furnace roller mounting plates with
Furnace shell is fully welded, and is welded on the outside of 40 furnace roller mounting plates with furnace shell quadrangle section, 41 furnace roller mounting plates block blind plate, 42 bearing block for furnace roller.
Specific embodiment
The present invention is further illustrated below by way of specific embodiment.
A kind of the hunt leak realization specific implementation of whole pressure testing air seal test method of segmentation comprises the steps of:
1, as shown in each furnace section arrangement schematic diagram of Fig. 1 continuous annealing furnace, PH/NOF preheats non-oxidation furnace 1, RTF radiant tube heating furnace
2, SF resistance band heating furnaces 3, CTF radiant tube cooling section 4, SRJC control cooling section 5, RRJC rapid cooling section 6, furnace throat 7, inlet seal
Room 8, exit seal room 9.First uneasiness loading port seals room 8 in furnace shell installation process, and exit seal room 9 connects between each section of furnace shell
Connect furnace throat 7.It is segmented according to furnace shell and divides SRJC control cooling section 5,6 two kinds of RJC furnaces of RRJC rapid cooling section are carried out as a segmentation
Air seal test.SF resistance band heating furnace 3,4 two kinds of annealing furnaces of CTF radiant tube cooling section carry out air seal test as a segmentation.
PH/NOF preheats non-oxidation furnace 1 and carries out air seal test separately as a segmentation, and RTF radiant tube heating furnace 2 is separately as one
Segmentation carries out air seal test, and PH/NOF preheats non-oxidation furnace 1, RTF radiant tube heating furnace 2, SF resistance band after the completion of Sectional Test
Heating furnace 3, CTF radiant tube cooling section 4 are connected and carry out whole pressure test leak-detecting again, RJC furnace be no longer attached to one act as it is whole
Body pressure test leak-detecting.
2, segmentation furnace shell leak hunting method is arranged compressed air in segmentation furnace shell as shown in Figure 6 end to end and is passed through interface, and setting is single
Only ball valve control gas is passed through, and micro-differential pressure gauge range 0-1600Pa is arranged at segmentation furnace shell both ends and middle section, in segmentation furnace shell two
U-shaped difference gauge pressure tap, range 1000Pa-0-1000Pa, the ball valve control of pressure tap retreat stubb pipe fitting is arranged in head and middle section
System, moves back tube drawing connector using rubber hose and connects U-shaped difference gauge.It is first turned on air inlet pipe valve and is filled with compressed air, slowly rise
Pressure, is hunted leak comprehensively after rising to 300Pa, when inspection with watering can by the detergent after dilution be ejected into weld seam, flange connection surface,
Screw thread junction checks whether there is bubble bulging, makes a mark, continue to boost, each section is checked after every liter of 300Pa, until
Test pressure reaches 1200Pa, stops supplying gas.Completely check there is making a mark for leakage, then pressure release processing, by boosting repeatedly
Leak detection is handled until No leakage.
3,1 pipe section pressure test of PH/NOF preheating section non-oxidation furnace leak detection such as Fig. 3 typical component schematic diagram, uses before segmentation leak detection
6mm steel plate carries out welding closure to entrance sealing plate 10, flue sealing plate 11, controling of the pressure of the oven baffle sealing plate 12, outlet sealing plate 14.Burner
13 leakage points are more, and leakage point is related to the airtight closure of flange, interior external fiber tube implication seal plug.The airtight closure of flange makes 6mm steel
Plate blind plate increases molecular fluid sealant and compresses closure using companion flange.Inside and outside fiber tube mouth uses plug to wind raw material band
It blocks.18 flange of thermocouple hole is blocked to be blocked using companion flange folder blind plate and asbestos pad.Furnace roller preformed hole uses 6mm steel
Plate increases molecular fluid sealant, is pressed on furnace roller mounting plate 15 by bearing block for furnace roller 42, pressurization inspection step by step after the completion of blocking
Leakage.
4,2 pipe section pressure test of RTF radiant tube heating furnace leak detection such as Fig. 4 typical component schematic diagram, uses 6mm steel before segmentation leak detection
Plate exports sealing plate 14 and carries out welding closure, radiation pipe burner tip 20 is protected using two after being installed on furnace shell and welds weldering to entrance sealing plate 10
It connects on furnace shell flange.
5, the leak detection of 3 pipe section pressure test of SF resistance band heating furnace is as used 6mm steel plate before the segmentation leak detection of Fig. 5 typical component schematic diagram
It to entrance sealing plate 10, exports sealing plate 14 and is blocked, it is close that 21 insulation board of electrode terminal adds asbestos washer to smear macromolecular liquid
Sealing is blocked, and gaseous mixture is filled with and bottom discharge mouth nipple 22 is blocked using outer pipe plug head winding raw material band, is blocked
Pressurization leakage detection step by step after the completion.
6, SRJC, RRJC control are cold takes the leak detection of furnace pipe section pressure test as used 6mm before the segmentation leak detection of Fig. 6 typical component schematic diagram
Steel plate exports sealing plate 14 and is blocked to entrance sealing plate 10, and circulating fan 23, plenum chamber 24 is welded on furnace shell, and water is cooling
Device 31 is mounted in plenum chamber 30 and is sealed using silica gel pad, and 25 flange port of water cooler adds asbestos pad to prevent leakage in heat exchanger from influencing
Air seal test, circulation air path 26 are to be welded to connect, and valve switch axle envelope is sealed using sealant, is pressurizeed step by step after the completion of blocking
Leak detection.
7, after pipe section pressure test leak detection is qualified, bulk testing is gradually connected to as shown in fig. 7, pass the test criterion are as follows: PH/
NOF preheats non-oxidation furnace 1, RTF radiant tube heating furnace 2, SF resistance band heating furnace 3, when the whole pressure testing of CTF radiant tube cooling section 4,
Furnace pressure timing pressure maintaining half an hour since 1200Pa is down to 350Pa, and the above are qualifications.SRJC controls cooling section 5, and RRJC is fast
When cold section 6 whole pressure testing, furnace pressure timing pressure maintaining half an hour since 800Pa is down to 350Pa, and the above are pressure maintaining successes；In furnace
Kept for half an hour do not fall to qualification when pressure is down to 60Pa.
Claims (1)
1. the air seal test method of a kind of segmentation leak detection, whole pressure testing, it is characterized in that: including
Reserved in step 1, furnace shell installation process into, outlet envelope room, furnace throat do not install: first uneasy loading port sealing when furnace shell is installed
Room, exit seal room, furnace throat；Enter, exit seal room setting nitrogen jet sealing device is not involved in air-tight test, furnace throat design
There is 1-2 furnace roller mounting hole in short and small side, and the installation of plate temperature meter and correction hole are arranged at top, gradually connects after the completion of furnace shell segmentation leak detection
Pressure test leak-detecting when logical, furnace throat reserved empty position is as the building construction of resistance to material material, the access way of personnel；
Step 2 divides airtight experimental technique segmentation, carries out airtight closure to each segmentation:
Step 2.1, RJC control cooling section carry out air seal test as a segmentation, carry out resistance to material due to being not required to scene inside it
It building, can carry out air seal test detection after being installed, RJC controls cooling section and controls cooling section by SRJC, RRJC rapid cooling section,
And 1 furnace throat connection, RJC control cooling section furnace pressure highest in continuous annealing furnace normal productive process, are passed through nitrogen therein
Important to whole unit control climate to use, RJC controls cooling segment length between 50m-60m, and section length is appropriate for
Airtight experiment；
Step 2.2, CTF radiant tube cooling section carry out air seal test as a segmentation, because its internal resistance to material adds for fibre module
The design of stainless steel lining plate structure, furnace segment length is in 20m, and completing resistance to material, to build the time very fast, but furnace section is too short does not have segmentation examination
Condition is tested, arrangement carries out airtight experiment together with SF resistance band heating furnace；
Step 2.3, SF resistance band heating furnace carry out air seal test as segmentation, furnace bottom by fire resisting brick masonry at resistance
With groove, side wall and furnace roof are fiber backboard and fibre module, and resistance to material construction is very fast, after the bottom resistance band preformed hole of resistance to material is held successfully
Airtight experiment can be carried out by installing resistance band binding post, and SF resistance band heating furnace, 80 meters of furnace body sections of furnace superintendent are small to add CTF furnace 20
100 meters of meter Gong Ji are suitable as a segmentation and carry out air seal test；
Step 2.4, RTF radiant tube heating furnace carry out air seal test as a segmentation, and bottom and side wall are refractory brick, top
Portion is fibre module structure, and the masonry time is slower, also needs installation W type radiant tube after the completion, and flange can carry out after being all fully welded
Air seal test, RTF furnace length are suitable as segmentation and carry out air seal test 46 meters of section of burner hearth are larger；
Step 2.5, PH/NOF preheating non-oxidation furnace carry out air seal test, the resistance to all refractory brick of material structure as a segmentation
Design, furnace roller brick, burner block, vault brick masonry difficulty are big, and the time is slow, and PH/NOF furnace length is larger suitable in 50 meters of section of burner hearth
Air seal test is carried out as a segmentation；
Step 3 is gradually connected to whole pressure testing: after the completion of segmentation leak detection, each section of furnace throat in place, PH/NOF preheats non-oxidation furnace, RTF
Radiant tube heating furnace, SF resistance band heating furnace, CTF radiant tube cooling section, above 4 sections of furnace shells connect integral progress air-tightness examination
It tests；RJC control cooling section will not wherein carry out air-tight test in access；
Step 4, burner typical leak point analysis and airtight close measure: PH/NOF preheats the more burners of non-oxidation furnace burner leakage point
With furnace shell flange connection surface using asbestos washer encryption sealing sealing, sealant be applied to connection bolt on the inside of, prevent gas from
It is bolted place's leakage, pipe interface flange joint face production 6mm steel plate does blind plate and places between the flanges and smear sealant
Sealing, igniter burner are removed, and internal thread nozzle adds raw material band to block using plug, and external fiber tube mouth adds raw material band to seal using pipe cap
It is stifled；
Step 5, furnace roller mounting plate typical leak point analysis and airtight close measure: it is fully welded on the inside of furnace roller mounting plate with furnace shell, furnace
Furnace roller mounting plate is determined with the section solid welding of furnace shell quadrangle on the outside of roller mounting plate, and furnace roller installation is installed between furnace roller mounting plate and bearing block for furnace roller
Plate blocks blind plate, and blind plate smearing sealant is pressed on furnace roller mounting plate by bearing block for furnace roller plays sealing function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810850623.6A CN109000856B (en) | 2018-07-28 | 2018-07-28 | Air-tight test method for sectional leak detection and integral pressure test |
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| CN201810850623.6A CN109000856B (en) | 2018-07-28 | 2018-07-28 | Air-tight test method for sectional leak detection and integral pressure test |
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| CN109000856A true CN109000856A (en) | 2018-12-14 |
| CN109000856B CN109000856B (en) | 2020-09-11 |
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Cited By (3)
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| CN109827715A (en) * | 2019-02-28 | 2019-05-31 | 重庆昌兴塑胶有限责任公司 | Pipeline surveys bad point device |
| CN111829729A (en) * | 2020-06-29 | 2020-10-27 | 国网天津市电力公司电力科学研究院 | Method for detecting leak point by expansion air-saving tightness of gas turbine exhaust pipeline |
| 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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| 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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| Publication number | Publication date |
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| CN109000856B (en) | 2020-09-11 |
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