CN102062532A - Method for mounting water beam of walking beam heating furnace in thermal state - Google Patents
Method for mounting water beam of walking beam heating furnace in thermal state Download PDFInfo
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- CN102062532A CN102062532A CN2009102197901A CN200910219790A CN102062532A CN 102062532 A CN102062532 A CN 102062532A CN 2009102197901 A CN2009102197901 A CN 2009102197901A CN 200910219790 A CN200910219790 A CN 200910219790A CN 102062532 A CN102062532 A CN 102062532A
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Abstract
The invention relates to a method for mounting a water beam of a walking beam heating furnace in a thermal state, namely a simulated working state. The method is characterized in that: an assembly welding method for the water beam and an upright post at the temperature of 273+/-10 DEG C is completely simulated through a heating incubator and a temperature control system, and comprises the following operating steps of: 1) determining the verticality and elevation of a double-barreled upright post, and fixedly welding the double-barreled upright post; 2) calculating the heated elongation of the water beam; 3) taking the double-barreled upright post as a center, correspondingly determining center distance among other upright posts according to the elongation, and fixedly welding all the upright posts; 4) correcting out-of-tolerance dimension among the upright posts after finishing the welding; 5) arranging a heating box; 6) heating the water beam, and matching with welding; and 7) keeping the temperature and cooling, wherein the heating box is arranged and controlled in sections. The invention has the advantages that: the service life is obviously prolonged, the welding stress in a cold drawing state is eliminated, and the fabrication error of the water beam can be effectively eliminated in the construction process.
Description
Technical field
The present invention relates to walking beam furnace water beam hot be installation method under the analog operation state.
Background technology
Heating furnace is a big classification of industrial furnace, is meant that the stove of states of matter variation and chemical reaction does not take place in stove heated material substantially, and it is the Thermal Equipment of a complexity, and wherein the water beam partly is the cardiac component of heating furnace.The water beam is to rely on the orderly motion of furnace bottom machinery to support blank to move to burner from the stove tail step by step in inside heating furnace, and comes out of the stove after making blank reach the temperature of regulation.Water beam duty is to work in 1250 ℃ burner hearth, because of it has the insulation heat insulation layer, still works under 273 ℃ of states in temperature in it.How to solve that expansion issues is the difficult point of work progress under the water deck-molding temperature state, present construction technology is exactly according to swell increment, utilizes the strength of external force that swell increment is reserved,
Mounting means with five popular, common at present root post situations is an example, as Fig. 3:
At first locate the 1# column, after good mouthful, weld, draw the 2# column then, arriving given size welds, the 3# column that stretches then welds to given size, the 4# column that stretches then arrives given size and welds, and this moment, the 5# twin columns should be under nature threeway 3 and column counterpart to be welded then.Need to guarantee that spacing is a design size between column before same the stretching, stretching and welding need to guarantee the absolute altitude of water beam 1, because changing will appear in absolute altitude when welding and stretching, this variation need find rule to reserve then.
Facts have proved that there is following drawback in this cold drawn installation method:
1, because of need pull with external force, must guarantee that water beam column has certain height, if insufficient height is difficult in and reserves amount of tension in the elasticity, this highly directly influences the overall volume of body of heater, and the effective overheated volume in the burner hearth.Thereby invisiblely the cost of investment of heating furnace and the waste of a large amount of energy in the use have been strengthened.
2, be difficult to guarantee the column perpendicularity during duty in stove of water beam in the future, thereby can not guarantee that water beam and column thereof are really to bear normal pressure.
3, be in work progress, to be difficult to inspecting for acceptance of the process of carrying out.
Summary of the invention
Purpose of the present invention provides a kind of walking beam furnace water beam hot installation method, can directly objectively carry out the installation of water beam column, avoids all drawbacks of current installation method.
For solving the problems of the technologies described above, technical scheme of the present invention is:
The hot installation method of walking beam furnace water beam adopts heater incubator and the complete Simulated Water beam of temperature control system to carry out the assembly welding method of water beam and column under 273 ± 10 ℃, and its operating process step is as follows:
1) measure water beam entablature is to the height Δ h between three ports, determine the high a of last top mark of two-tube column according to designing requirement, in the perpendicularity of confirming two-tube column at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, two-tube column and upper backup pad, lower supporting plate are welded together;
2) calculate between each three port the water beam elongation that is heated, x=L* λ, λ is the coefficient of expansion in the formula, L is water beam three port spacings;
3) be the center with two-tube column, press centre-to-centre spacing between corresponding definite other column of L+x value, in the centre-to-centre spacing of confirming column successively at deviation ± 2.0mm, perpendicularity is at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, all column upper backup pads, lower supporting plate and column are all welded together;
4) after welding is finished, check centre-to-centre spacing between each column, perpendicularity and absolute altitude as the requirement that size exceeds deviation, be proofreaied and correct dimension discrepancy;
5) heating cabinet is arranged on Shui Liangshang, three ports expose outside, and heat tape is arranged on the front and back of water beam, with crane gear the hanger multiple spot are lifted by crane simultaneously, winch to the column top;
6) Jiang Shuiliang is heated to 273 ± 10 ℃, and 2～2.3 ℃/minute of programming rates when three ports and column centre-to-centre spacing during less than 2mm, begin insulation, and after three ports and the complete counterpart of column, Jiang Shuiliang falls, three ports with weld after core pipe on the column cooperates;
7) after the welding of water beam three ports and all columns is finished, carry out the insulation of water beam, temperature is 200～240 ℃, temperature retention time 50～100 minutes, after insulation finishes, treat that the water beam naturally cools to below 100 ℃ after, remove heating cabinet.
Heating cabinet sectional described in the step 5 is provided with, and segmentation control is to guarantee to add thermal effect.
Compared with prior art, the invention has the beneficial effects as follows: it is remarkable that the present invention makes water beam and column thereof bear the normal pressure effect, obviously increased service life, eliminated the welding stress under the cold conditions extended state, the centering size is good, guarantee the perpendicularity under the duty of column, and in work progress, can eliminate the making error of water beam effectively.
Description of drawings
Fig. 1 is the invention process structural representation;
Fig. 2 is a water beam intensification structure chart;
Fig. 3 is a prior art installation method schematic diagram.
Among the figure: 1-water beam 2-column 3-three port 4-upper backup pad 5-lower supporting plate 6-core pipe 7-heating cabinet 8-heat tape 9-hangers
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further:
The hot installation method of walking beam furnace water beam adopts heater incubator and the complete Simulated Water beam of temperature control system to carry out the assembly welding method of water beam and column under 273 ± 10 ℃, and its operating process step is as follows:
1) measure water beam 1 entablature is to the height Δ h of 3 of three ports, the contrast drawing is determined the high a of last top mark of two-tube 3# column 2, in the perpendicularity of confirming the 3# column at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, 3# column 2 and upper backup pad 4, lower supporting plate 5 are welded together;
2) calculate between each three port water beam 1 elongation that is heated, x=L* λ, λ is the coefficient of expansion in the formula, L is water beam three port spacings;
3) be the center with two-tube 3# column, press centre-to-centre spacing between corresponding definite other columns of L+x value, in the centre-to-centre spacing of confirming column successively at deviation ± 2.0mm, perpendicularity is at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, all column upper backup pads 4, lower supporting plate 5 and column 2 are all welded together;
4) after welding is finished, check centre-to-centre spacing between each column, perpendicularity and absolute altitude as the requirement that size exceeds deviation, be proofreaied and correct dimension discrepancy;
5) heating cabinet is arranged on Shui Liangshang, three ports expose outside, and heat tape is arranged on the front and back of water beam, with crane gear the hanger multiple spot are lifted by crane simultaneously, winch to the column top; See Fig. 2, by the heating of heat tape 8, reach the extension elongation of water beam 1, and link to each other with control system, with internal temperature being delivered in the control system promptly and accurately by the thermocouple of heat tape 8 inside.The heating cabinet sectional is provided with, and segmentation control is to guarantee to add thermal effect.
6) Jiang Shuiliang is heated to 273 ± 10 ℃, and 2～2.3 ℃/minute of programming rates when three ports and column centre-to-centre spacing during less than 2mm, begin insulation, and after three ports and the complete counterpart of column, Jiang Shuiliang falls, three ports 3 with weld after core pipe 6 on the column 2 cooperates;
7) after the welding of water beam three ports and all columns is finished, carry out the insulation of water beam, temperature is 200～240 ℃, temperature retention time 50～100 minutes; After insulation finishes, treat that the water beam naturally cools to below 100 ℃ after, remove heating cabinet.
See Fig. 1, this embodiment describes the installation process of water beam heating means with six sections water beam columns:
1) measure water beam 1 entablature is to the height Δ h of 3 of three ports, and this size of Δ h also needs to carry out on-the-spot repetition measurement, because the making error is arranged, thereby influences the centering of absolute altitude.The contrast drawing is determined the high a of last top mark of two-tube 3# column 2, in the perpendicularity of confirming the 3# column at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, 3# column 2 and upper backup pad 4, lower supporting plate 5 are welded together;
2) calculate between each three port water beam 1 elongation that is heated, x=L* λ, λ is the coefficient of expansion in the formula, L is water beam three port spacings; The in-site measurement size of water beam crossbeam threeway is 2590mm/2593mm/2591mm/2593mm/2592mm, and standard size is 2592mm, and tolerance is ± 1.5mm.
The coefficient of expansion: λ=3mm/m,
Elongation calculates x=3mm/m * 2.6m=7.8mm.
The intercolumniation of water beam column is of a size of 2601mm/2599mm/2598mm/2600mm/2601mm, and standard size is 2600mm,
Tolerance is ± 2mm.
For the 1# column, the making error is 2590-2592=-2mm.
Alignment error is 2601-2600=+1mm.
Perpendicularity is overproof+3mm
So this column counterpart total deviation be Δ=+ 3-(2)=5mm. just needs 1# column root heating, sharply the 5mm deviation is eliminated in cooling then.
We should at first accurately measure out each threeway saliva mouth to the height between the crossbeam cushion block, just Δ h with clamp or angle square.According to this size of Δ h, contrast figure paper size, determine the high a of last top mark of the two-tube column of water beam, this moment, we should be with two-tube column upper backup pad centering, the fixing welding then of spot welding, contrast figure paper size, adjust horizontal vertical center line of two-tube column and perpendicularity, after absolute altitude, center line and the perpendicularity of determining this water beam column, meet the figure paper size then with spot welding around upper backup pad and the column, simultaneously that lower supporting plate and column weldering is dead fixing.This moment, we should weld the upper and lower support plate and the column of two-tube column fully, and welding finishes the back, and we check the perpendicularity and the absolute altitude of column once more, and perpendicularity is ± 1.0mm absolute altitude ± 1.0mm.
3) be the center with the twoport column, distance between water beam crossbeam three ports of contrast actual measurement, go out 7.8mm greatly, just the distance between gap ratio water beam crossbeam three ports between column goes out 7.8mm greatly, according to this step, after center line, absolute altitude and the perpendicularity centering of other columns met the requirements, with all column upper and lower support plates and column all welding finish.
4) if welding back perpendicularity is overproof, adopt the flame correction method to eliminate.We prepared to add thermal weld after this moment, we stayed shelves signature in many ways for future reference with all reinspection data formation character property files.
5) before the welding, heating cabinet is arranged on Shui Liangshang, three ports expose outside, and heat tape is arranged on the front and back of water beam, with crane gear the hanger multiple spot is lifted by crane simultaneously, winch to the column top; See Fig. 2, by the heating of heat tape 8, reach the extension elongation of water beam 1, and link to each other with control system, with internal temperature being delivered in the control system promptly and accurately by the thermocouple of heat tape 8 inside.The heating cabinet sectional is provided with, and segmentation control is to guarantee to add thermal effect.
With door frame water beam crossbeam level is sling, be positioned over six roots of sensation column top, with the chain block on ready two door frame supports crossbeam is sling, other four door shaped stents are placed on every root post next door, after hanging up properly chain block, rise simultaneously be put into apart from the column core pipe mouth of pipe 50 millimeters stop,, making it all around on same line blocking with crossbeam is two-tube around the column double bimouth pipe with iron plate.Prepare heating.
6) begin to be heated to crossbeam when being elongated to crossbeam water beam aperture and column core pipe and not interfering, chain block on six door shaped stents slowly drops to apart from the column mouth of pipe 5-10mm scope simultaneously, when heater progressively is warmed up to 273 ± 10 ℃, 2～2.3 ℃/minute of programming rates, be incubated, between this, arrange the special messenger to control sweat box, whether control each column and crossbeam mouth heats and puts in place, the control crossbeam mouth of a river and column also have 2mm mouth to mouth, stopping heating being incubated, after under keeping warm mode, observing crossbeam and the complete counterpart of column, carry out counterpart, also should consider absolute altitude this moment, and absolute altitude should carry out centering under the monitoring of measuring instrument, welds under assurance absolute altitude and counterpart moulding.If numerical value is inconsistent with measuring, moves place, the crossbeam mouth of a river to chain block and weld dead.
7) after weld bond has welded fully, carry out the crossbeam insulation, temperature is between 200 ℃-240 ℃, temperature retention time is 60 minutes during 20 ℃ of left and right sides of general environment temperature, and temperature retention time is 90 minutes during 5 ℃ of left and right sides of environment temperature, then progressively cooling, after dropping to below 100 ℃, incubator can be removed.
After adopting this worker method construction, column vertical and horizontal perpendicularity is 0.5 millimeter, and column and stove centerline deviation are 0.5 millimeter, the top absolute altitude has been controlled at ± 1 millimeter within, installation accuracy has all reached designing requirement.The welding of water beam is all carried out Non-Destructive Testing in 100% ratio, and one-time detection qualified rate is more than 99%.The flushing of water girder system system is suppressed to have reached and is cleaned metal surface cleaning, no spot corrosion, no secondary corrosion product, and the metal average corrosion rate of measuring with corrosion indicator is 5g/ (m
2.h), the corrosion total amount is 50g/m
2. it is qualified that flushing is suppressed once.As seen, by adding the mode of hot water beam, make the elongation of extending in the horizontal direction of water beam.Thereby reach the perpendicularity with the column counterpart, and really simulated the duty of water beam.The water depth of beam there is not specific (special) requirements.
Claims (2)
1. the hot installation method of walking beam furnace water beam is characterized in that, adopts heater incubator and the complete Simulated Water beam of temperature control system to carry out the assembly welding method of water beam and column under 273 ± 10 ℃, and its operating process step is as follows:
1) measure water beam entablature is to the height Δ h between three ports, determine the high a of last top mark of two-tube column according to designing requirement, in the perpendicularity of confirming two-tube column at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, two-tube column and upper backup pad, lower supporting plate are welded together;
2) calculate between each three port the water beam elongation that is heated, x=L* λ, λ is the coefficient of expansion in the formula, L is water beam three port spacings;
3) be the center with two-tube column, press centre-to-centre spacing between corresponding definite other column of L+x value, in the centre-to-centre spacing of confirming column successively at deviation ± 2.0mm, perpendicularity is at deviation ± 1.0mm, absolute altitude in deviation ± 1.0mm scope after, all column upper backup pads, lower supporting plate and column are all welded together;
4) after welding is finished, check centre-to-centre spacing between each column, perpendicularity and absolute altitude as the requirement that size exceeds deviation, be proofreaied and correct dimension discrepancy;
5) heating cabinet is arranged on Shui Liangshang, three ports expose outside, and heat tape is arranged on the front and back of water beam, with crane gear the hanger multiple spot are lifted by crane simultaneously, winch to the column top;
6) Jiang Shuiliang is heated to 273 ± 10 ℃, and 2～2.3 ℃/minute of programming rates when three ports and column centre-to-centre spacing during less than 2mm, begin insulation, and after three ports and the complete counterpart of column, Jiang Shuiliang falls, three ports with weld after core pipe on the column cooperates;
7) after the welding of water beam three ports and all columns is finished, carry out the insulation of water beam, temperature is 200～240 ℃, temperature retention time 50～100 minutes, after insulation finishes, treat that the water beam naturally cools to below 100 ℃ after, remove heating cabinet.
2. the hot installation method of walking beam furnace water beam according to claim 1 is characterized in that, the heating cabinet sectional described in the step 5 is provided with, and segmentation control is to guarantee to add thermal effect.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102197901A CN102062532A (en) | 2009-11-11 | 2009-11-11 | Method for mounting water beam of walking beam heating furnace in thermal state |
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| CN2009102197901A CN102062532A (en) | 2009-11-11 | 2009-11-11 | Method for mounting water beam of walking beam heating furnace in thermal state |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706142A (en) * | 2012-01-16 | 2012-10-03 | 苏州工业园区姑苏科技有限公司 | Limiting device for preventing workpieces from shifting |
| CN103486853A (en) * | 2013-09-26 | 2014-01-01 | 中国十九冶集团有限公司 | Method for mounting stepping device of stepping-beam-type heating furnace |
| CN106075789A (en) * | 2016-08-17 | 2016-11-09 | 浙江刚玉智能科技有限公司 | Fire-fighting simulation scene of a fire crossbeam |
| CN106282515A (en) * | 2016-08-26 | 2017-01-04 | 李宏亮 | A kind of heating furnace body steel construction |
| CN106624413A (en) * | 2016-12-28 | 2017-05-10 | 中冶天工集团天津有限公司 | Heating furnace water beam stand column mounting perpendicularity control method |
| CN108857111A (en) * | 2018-06-29 | 2018-11-23 | 中国二十冶集团有限公司 | The welding method of heating furnace water beam |
| CN109114975A (en) * | 2018-09-18 | 2019-01-01 | 安徽马钢设备检修有限公司 | A kind of walking beam furnace water cooling beam column installation method |
| CN113390462A (en) * | 2021-06-11 | 2021-09-14 | 马鞍山钢铁股份有限公司 | Device for finding blockage and abnormity of foreign matter in skirt cover of stepping furnace |
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2009
- 2009-11-11 CN CN2009102197901A patent/CN102062532A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706142A (en) * | 2012-01-16 | 2012-10-03 | 苏州工业园区姑苏科技有限公司 | Limiting device for preventing workpieces from shifting |
| CN103486853A (en) * | 2013-09-26 | 2014-01-01 | 中国十九冶集团有限公司 | Method for mounting stepping device of stepping-beam-type heating furnace |
| CN103486853B (en) * | 2013-09-26 | 2015-05-06 | 中国十九冶集团有限公司 | Method for mounting stepping device of stepping-beam-type heating furnace |
| CN106075789A (en) * | 2016-08-17 | 2016-11-09 | 浙江刚玉智能科技有限公司 | Fire-fighting simulation scene of a fire crossbeam |
| CN106282515A (en) * | 2016-08-26 | 2017-01-04 | 李宏亮 | A kind of heating furnace body steel construction |
| CN106282515B (en) * | 2016-08-26 | 2018-08-10 | 李宏亮 | A kind of heating furnace body steel construction |
| CN106624413A (en) * | 2016-12-28 | 2017-05-10 | 中冶天工集团天津有限公司 | Heating furnace water beam stand column mounting perpendicularity control method |
| CN108857111A (en) * | 2018-06-29 | 2018-11-23 | 中国二十冶集团有限公司 | The welding method of heating furnace water beam |
| CN109114975A (en) * | 2018-09-18 | 2019-01-01 | 安徽马钢设备检修有限公司 | A kind of walking beam furnace water cooling beam column installation method |
| CN113390462A (en) * | 2021-06-11 | 2021-09-14 | 马鞍山钢铁股份有限公司 | Device for finding blockage and abnormity of foreign matter in skirt cover of stepping furnace |
| CN113390462B (en) * | 2021-06-11 | 2022-03-22 | 马鞍山钢铁股份有限公司 | Device for finding blockage and abnormity of foreign matter in skirt cover of stepping furnace |
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Application publication date: 20110518 |