CN102848056B - Field welding method for wall boards of steel lining of nuclear power plant - Google Patents
Field welding method for wall boards of steel lining of nuclear power plant Download PDFInfo
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- CN102848056B CN102848056B CN201210368249.9A CN201210368249A CN102848056B CN 102848056 B CN102848056 B CN 102848056B CN 201210368249 A CN201210368249 A CN 201210368249A CN 102848056 B CN102848056 B CN 102848056B
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Abstract
The invention relates to a field welding method for wall boards of a steel lining of a nuclear power plant, belonging to the technical field of building decoration of the nuclear power plant. The method comprises the following steps of: assembling the wall boards of the steel lining in place through a tool and randomly selecting a vertical seam between the wall boards of the steel lining as a shrinkage vertical seam for field final welding; performing spot welding on a vertical seam opposite to the shrinkage vertical seam, next performing spot welding on two circular seams adjacent to the left and right sides of the first vertical seam, then continuously performing spot welding on the two vertical seams adjacent to two first circular seams along the clockwise direction and the anticlockwise direction respectively, performing spot welding on all vertical seams and circular seams at spaced locations along the clockwise direction and the anticlockwise direction respectively from the first vertical seam by analogy, until the final manual spot welding is performed on the shrinkage vertical seam; and repeating the steps to perform automatic full-length welding on all vertical seams and circular seams from the first vertical seam which is subjected to spot welding, until the final automatic full-length welding is performed on the shrinkage vertical seam. According to the method, field mounting of the wall boards of the steel lining of the nuclear power plant is performed by using a tungsten electrode argon arc automatic welding machine, the welding deformation is reduced, and the mounting working efficiency and the quality are improved.
Description
Technical field
The present invention relates to the mounting process in a kind of nuclear power station steel lining, belong to nuclear power station construction and decoration technical field.
Background technology
The nuclear power Long-and Medium-term Development planning of reviewing and passing in principle according to State Council, to the year two thousand twenty, the ratio in whole energy resource structure will reach more than 4% nuclear power, Chinese Nuclear Power installed capacity will reach 7,000 ten thousand kilowatts, and the nuclear power developing policy of our country changes develop actively nuclear power into from optimum development nuclear power.Each Construction of Nuclear Electricity company will face the challenge of simultaneously bearing multiple nuclear power generating sets construction tasks and multiple project integrated managements, for responding actively the challenge of extensive Nuclear power project, must improve constantly the ability of technological innovation, carry out the research of core technology, could meet the needs of following nuclear power developing.
In the construction of nuclear power station, it in steel lining, is one of nuclear island important component, it belongs to caryoplasm protects the bearing device of I level, nuclear safety II level, and this equipment can ensure the radioactive substance that sealing discharges and the diffusion that prevents the fissile material particularly producing in the state of accident under a loop loss of-coolant accident (LOCA) operating mode.
So far; domestic all built and nuclear power engineerings of building; install and be mostly still the welding procedure that adopts stick electrode arc welding at present as the steel lining backing plates such as Daya Gulf nuclear power, Qinshan Phase II NPP, ridge Australia nuclear power, gulf, field nuclear power are on-the-spot; adopt the gas-shield automatic weldings such as argon arc welding or Lincoln weld also to only limit in workshop prefabricated, it is reported that external situation is also similar.Stick electrode arc welding is traditional manual welding technique, and welding job amount is large, and welding efficiency is low, and welding deformation is large, and working condition is poor, and labour intensity is high, and welding quality is difficult for guarantee, and consumable quantity is large, and cost is high.Along with the arrival on scientific and technological development and new round Construction of Nuclear Electricity peak, need a kind of high efficiency, high-quality On-site Welding Technology.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of on-the-spot welding method of installing of more high efficiency nuclear power station steel lining backing plate that meets the requirement of core level workmanship.
In order to solve the problems of the technologies described above, the technical scheme that the present invention proposes is: the on-the-spot welding and assembling method of a kind of nuclear power station steel lining backing plate, adopts TIG Welding Machine, and carry out following steps:
1) by frock, steel lining backing plate is grouping in placely, between every block of steel lining backing plate, forms longitudinal vertical seam and horizontal circumferential weld, an optional vertical seam is as the vertical seam of contraction of on-the-spot last welding;
2) first the vertical seam that shrinks vertical seam opposite is carried out to manual spot welding as the first vertical seam, point welds after the first vertical seam point, then two circumferential welds of the adjacent first vertical seam left and right are carried out to manual spot welding as two the first circumferential welds, then continue respectively along clockwise and counterclockwise again two vertical seams of adjacent two the first circumferential welds respectively being carried out to manual spot welding as two second vertical seams, by that analogy since the first vertical seam respectively along clockwise and all vertical seam and the circumferential welds of the counterclockwise manual spot welding in compartment of terrain, until vertical seam is shunk in last manual spot welding;
3) according to the 2nd) order of order (repeating in other words the 2nd) step of step), the first vertical seam welding from point starts all vertical seams and circumferential weld to carry out automatic full weld, until last full weld automatically shrinks vertical seam.
Further, in technique scheme, the protection of described TIG Welding Machine employing center and two kinds of inert gas shieldings of outer protection, wherein the flow of center protection inert gas is 5～6L/min, the flow of outer protection inert gas is 15～16L/min.
Further, in technique scheme, it is that 80 degree, arc center's maximum temperature are 1800 ± 100 DEG C that electric arc when described automatic full weld is sprawled angle.
Present inventor, by investigation both at home and abroad and technique demonstration, finds: Nuclear Power Station relevant criterion limits to some extent to the method for CO2 gas shielded arc welding from contrast; Submerged-arc welding, due to the process characteristic of himself, is also difficult to be engaged in the welding of on-the-spot vertical seam at present; The basic point of collateral security weldquality is set out, and the consideration of operability, has finally determined and has selected tungsten argon arc automatic welding process.But common argon tungsten-arc welding exists the shortcomings such as fusion penetration is shallow, deposited metal loading is little, the general 6mm of nuclear power station steel lining backing plate thickness, adopts common argon tungsten-arc welding production efficiency low, less economical.In order to overcome these shortcomings, present inventor is through research repeatedly, common argon tungsten-arc welding is proposed to a kind of improvement is: by the gas flow-regulating suitable to dual inert gas, make the welding arc can high compression, thereby obtain higher arc energy, form a kind of brand-new compression arc high-energy tungsten argon arc automatic welding process.
The on-the-spot installation of nuclear power station steel lining backing plate that adopts the technical scheme of the invention described above to carry out, compared with traditional-handwork arc welding, mainly contains following advantage:
1, automatic welding process is realized automation substantially, and welding parameter is stable, and the external and inherent quality of butt welded seam provides sufficient guarantee.
2, unstable will greatly the reduction along with the application of automatic welding of welding quality in the past causing due to problems such as welder's mental emotion, health discomforts.
3, welder's personnel demand quantity, from 18 left and right of a nuclear island, is reduced to 10 left and right, alleviates largely high professional qualification welder bottleneck constraint in short supply in current Construction of Nuclear Electricity.
4, one deck steel lining backing plate being installed can 3～4 days reduction of erection time, and the steel lining backing plate set-up time of 1 nuclear power station can shorten approximately two months durations, has reduced cost, has improved benefit.
In a word, by on-the-spot installation of nuclear power station steel lining backing plate that adopts compression arc high-energy tungsten argon arc automatic welding process to carry out, reduce welding deformation, work efficiency and the quality of installing are improved, reduce cost, shortened construction duration, strengthened the ability of Construction of Nuclear Electricity contractor Site Welding, improve welding quality and the efficiency of Nuclear Power Station, reached caryoplasm and protected the construction requirement of I level, nuclear safety II level.
Improving of the technical scheme of the invention described above one is: the described the 3rd) in step, described automatic full weld is: first backing welding is carried out in the inner side of the vertical seam to steel lining backing plate and circumferential weld, then cosmetic welding is carried out in the inner side of the vertical seam to steel lining backing plate and circumferential weld, after vertical seam to steel lining backing plate and the inner side welding of circumferential weld finish, backing welding is carried out in the outside of the vertical seam to steel lining backing plate and circumferential weld again, and finally cosmetic welding is carried out in the outside of the vertical seam to steel lining backing plate and circumferential weld.
Improving of the technical scheme of the invention described above two is: the described the 3rd) in step, the electric current that described vertical seam is carried out to backing welding is that 270～350A, voltage are that 10～12V, speed of welding are 10～14cm/min, the electric current that described vertical seam is carried out to cosmetic welding is that 280～390A, voltage are 10～12V, and speed of welding is 15～22cm/min; The electric current that described circumferential weld is carried out to backing welding is that 160～280A, voltage are that 10～12V, speed of welding are 10～14cm/min, and the electric current that described circumferential weld is carried out to cosmetic welding is that 240～330A, voltage are that 10～12V, speed of welding are 15～18cm/min.
Improving of the technical scheme of the invention described above three is: the described the 3rd) in step, when described two circumferential welds are carried out to automatic full weld, adopt the weldings simultaneously of two tungsten argon arc automatic welder(welding machine)s.
Improving of the technical scheme of the invention described above four is: described frock is mainly made up of guide plate, buttress, cheater plate, chock, bearing pin and angle steel; One side of described cheater plate is fixedly connected with buttress with bearing pin by chock, its one end is buckled in again on angle steel, described angle steel is welded on the sidewall of steel lining backing plate, and the levels of described steel lining backing plate is close to each other by guide plate, and passes through buttress, cheater plate and angle steel group in place.
Improving of the technical scheme of the invention described above five is: described vertical seam and circumferential weld adopt I type groove, and the gap of described groove is 0～1mm, and the weight of described automatic welding wire reel and diameter are respectively 5KG and Ф 1.2mm.
Improving of the technical scheme of the invention described above six is: adopt monoblock type Windproof system, described monoblock type Windproof system is the inside and outside walkway board looping closed wind-proof shell with installation steel lining backing plate by steel lining backing plate, and comprises keel facility and protective equipment two parts; Described keel facility comprises the inside and outside support arranging along the inside and outside interval 200mm of steel lining backing plate; Described inside and outside support adopts steel pipe, and its termination bending forms to be linked up with and be fixed on the guardrail of inside and outside walkway board; Described protective equipment comprises by nylon rope and is bundled in the tarpaulin on the guardrail of inside and outside walkway board.
Improving of the technical scheme of the invention described above seven is: described tungsten argon arc automatic welder(welding machine) contains welding tractor, automatic welding wire reel, arc voltage tracking system and low-frequency pulse producer.About the structure of tungsten argon arc automatic welder(welding machine) belongs to prior art, the present invention does not repeat them here.
Brief description of the drawings
Below in conjunction with accompanying drawing, the on-the-spot welding and assembling method of nuclear power station steel lining backing plate of the present invention is described further.
Fig. 1 is that the steel lining backing plate group of the embodiment of the present invention one is to schematic cross-section in place.
Fig. 2 is local enlarged diagram in Fig. 1.
Fig. 3 is the steel lining backing plate Site Welding sequential organization schematic diagram of the embodiment of the present invention one.
Fig. 4 is the vertical seam welding bead schematic diagram of the steel lining backing plate of the embodiment of the present invention one.
Fig. 5 is the circumferential weld welding bead schematic diagram of the steel lining backing plate of the embodiment of the present invention one.
Fig. 6 is the monoblock type Windproof system structural representation of the steel lining backing plate of the embodiment of the present invention one.
Detailed description of the invention
Embodiment mono-
The on-the-spot welding and assembling method of nuclear power station steel lining backing plate of the present embodiment, adopts TIG Welding Machine, and carries out following steps:
1) by frock, steel lining backing plate 104 is grouping in place.Specifically as depicted in figs. 1 and 2, the frock that the present embodiment adopts is guide plate 101, buttress 102, cheater plate 103, chock 105 and bearing pin 106, first fixes buttress 102 on the large angle steel 107 of lower one deck steel lining backing plate by cheater plate 103, chock 105 and bearing pin 106 liftings; Then weld a pair of guide plate 101 in the 1m left and right, hoop suitable for reading interval of lower one deck wallboard group to point; Finally lift steel lining backing plate 104, upper and lower two-layer steel lining backing plate 104 is close to each other by guide plate 101, and by 105 groups, buttress 102, cheater plate 103, angle steel 107 and chock in place.Every one deck steel lining backing plate 104 is 11, and buttress 102 is 22.
As shown in Figure 3, between every block of steel lining backing plate 104, form longitudinal vertical seam and horizontal circumferential weld, a vertical seam between optional a pair of steel lining backing plate 104 is as the vertical seam 100 of contraction of on-the-spot last welding.
2) as shown in Figure 3, first the vertical seam that shrinks vertical seam 100 opposites is carried out to manual spot welding as the first vertical seam 1, point welds after the first vertical seam 1, then two circumferential welds of the adjacent first vertical seam 1 left and right are carried out to manual spot welding as two the first circumferential welds 2 and 2 ', then continue respectively along carrying out manual spot welding with two that counterclockwise will distinguish again adjacent two the first circumferential welds 2 and 2 ' vertical seams 3 and 3 ' as two second vertical seams clockwise, found seam 1 respectively along clockwise and all vertical seam and the circumferential welds of the manual spot welding in counter clockwise direction compartment of terrain since first by that analogy, until vertical seam 100 is shunk in last manual spot welding.All vertical seams and the groove of circumferential weld adopt I type groove, and the gap of groove is all 0～1m, and all through grinding process.
3) according to the 2nd) order of order (repeating in other words the 2nd) step of step), the first vertical seam 1 welding from point starts all vertical seams and circumferential weld to carry out automatic full weld, until last full weld automatically shrinks vertical seam 100.
The protection of TIG Welding Machine employing center and two kinds of inert gas shieldings of outer protection of the present embodiment, wherein the flow of center protection inert gas is 5～6L/min, the flow of outer protection inert gas is 15～16L/min.
In when welding, it is that 80 degree, arc center's maximum temperature are 1800 ± 100 DEG C that electric arc when the automatic full weld of Flow-rate adjustment control by suitable center gas and outer protection gas is sprawled angle.
As shown in Figure 4 and Figure 5, the present embodiment the 3rd) in step, automatically the detailed process of full weld is: first backing welding 1 is carried out in the inner side of the vertical seam to steel lining backing plate 104 and circumferential weld, then cosmetic welding 2 is carried out in the inner side of the vertical seam to steel lining backing plate 104 and circumferential weld, after vertical seam to steel lining backing plate 104 and the inner side welding of circumferential weld finish, backing welding 3 is carried out in the outside of the vertical seam to steel lining backing plate 104 and circumferential weld again, and finally cosmetic welding 4 is carried out in the outside of the vertical seam to steel lining backing plate 104 and circumferential weld.
The main welding condition of the automatic full weld of the present embodiment sees the following form 1:
Table 1
The tungsten argon arc automatic welder(welding machine) of the present embodiment contains welding tractor, automatic welding wire reel, arc voltage tracking system and low-frequency pulse producer.The weight of automatic welding wire reel and diameter are respectively 5KG and Ф 1.2mm.
As shown in Figure 6, the present embodiment adopts monoblock type Windproof system, monoblock type Windproof system is by steel lining backing plate 104 and inside and outside inside and outside walkway board 11, the 12 looping closed wind-proof shells of steel lining backing plate 104 are installed, and comprises keel facility and protective equipment two parts.Keel facility comprises the inside and outside support 13,14 arranging along the inside and outside interval 200mm of steel lining backing plate 104; Inside and outside support 13,14 adopts steel pipe, and its termination bending forms hook 15 and is fixed on the guardrail 16 of inside and outside walkway board 11,12; Protective equipment comprises by nylon rope and is bundled in the tarpaulin 17 on the guardrail 16 of inside and outside walkway board 11,12.The specification of steel pipe is φ 26.9 × 2.8.
First the termination bending of the inner support of keel facility 13 is formed on the guardrail 16 that hook 15 is fixed on interior, walkway board 11, then protective equipment (tarpaulin 17) is bundled in by nylon rope on the guardrail 16 of inside and outside walkway board 11,12, tarpaulin 17 adopts and can prevent fires, " three is anti-" tarpaulin that again can be rainproof; Finally the termination bending of the outer support of keel facility 14 formed to hook 15 and is fixed on the guardrail 16 of outer walkway board 12, so just protection tarpaulin 17 being arranged between inside and outside support 13,14, thereby playing windbreak function.
Embodiment bis-
The on-the-spot welding and assembling method of the nuclear power station steel lining backing plate of the present embodiment and embodiment mono-are basic identical, and difference is: the 3rd) the main welding condition difference of the automatic full weld in step, as following table 2:
Table 2
Embodiment tri-
The on-the-spot welding and assembling method of the nuclear power station steel lining backing plate of the present embodiment and embodiment mono-are basic identical, and difference is: the 3rd) the main welding condition difference of the automatic full weld in step, as following table 3:
Table 3
The concrete technical scheme being not limited to described in above-described embodiment of the present invention, all employings are equal to replaces the technical scheme forming and is the protection domain that the present invention requires.
Claims (8)
1. the on-the-spot welding and assembling method of nuclear power station steel lining backing plate; it is characterized in that adopting tungsten argon arc automatic welder(welding machine); the protection of described tungsten argon arc automatic welder(welding machine) employing center and two kinds of inert gas shieldings of outer protection; wherein the flow of center protection inert gas is 5～6L/min; the flow of outer protection inert gas is 15～16L/min, and carries out following steps:
1) by frock, steel lining backing plate is grouping in placely, between every block of steel lining backing plate, forms longitudinal vertical seam and horizontal circumferential weld, an optional vertical seam is as the vertical seam of contraction of on-the-spot last welding;
2) first the vertical seam that shrinks vertical seam opposite is carried out to manual spot welding as the first vertical seam, point welds after the first vertical seam point, then two circumferential welds of the adjacent first vertical seam left and right are carried out to manual spot welding as two the first circumferential welds, then continue respectively along clockwise and counterclockwise again two vertical seams of adjacent two the first circumferential welds respectively being carried out to manual spot welding as two second vertical seams, by that analogy since the first vertical seam respectively along clockwise and all vertical seam and the circumferential welds of the counterclockwise manual spot welding in compartment of terrain, until vertical seam is shunk in last manual spot welding;
3) according to the 2nd) order of step, the first vertical seam welding from point starts all vertical seams and circumferential weld to carry out automatic full weld, until last full weld automatically shrinks vertical seam.
2. the on-the-spot welding and assembling method of nuclear power station steel lining backing plate according to claim 1, is characterized in that: it is that 80 degree, arc center's maximum temperature are 1800 ± 100 DEG C that electric arc when described automatic full weld is sprawled angle.
3. according to the on-the-spot welding and assembling method of nuclear power station steel lining backing plate described in claim 1 or 2, it is characterized in that: the described the 3rd) in step, described automatic full weld is: first backing welding is carried out in the inner side of described vertical seam and circumferential weld, then cosmetic welding is carried out in the inner side of described vertical seam and circumferential weld; Backing welding is carried out in the outside of the vertical seam to steel lining backing plate and circumferential weld again, and finally cosmetic welding is carried out in the outside of the vertical seam to steel lining backing plate and circumferential weld.
4. the on-the-spot welding and assembling method of nuclear power station steel lining backing plate according to claim 3, it is characterized in that: the described the 3rd) in step, the electric current that described vertical seam is carried out to backing welding is that 270～350A, voltage are that 10～12V, speed of welding are 10～14cm/min, the electric current that described vertical seam is carried out to cosmetic welding is that 280～390A, voltage are 10～12V, and speed of welding is 15～22cm/min; The electric current that described circumferential weld is carried out to backing welding is that 160～280A, voltage are that 10～12V, speed of welding are 10～14cm/min, and the electric current that described circumferential weld is carried out to cosmetic welding is that 240～330A, voltage are that 10～12V, speed of welding are 15～18cm/min.
5. the on-the-spot welding and assembling method of nuclear power station steel lining backing plate according to claim 4, is characterized in that: the described the 3rd) in step, when described two circumferential welds are carried out to automatic full weld, adopts two tungsten argon arc automatic welder(welding machine)s while weldings.
6. according to the on-the-spot welding and assembling method of nuclear power station steel lining backing plate described in claim 1 or 2, it is characterized in that: described frock is mainly made up of guide plate, buttress, cheater plate, chock, bearing pin and angle steel; One side of described cheater plate is fixedly connected with buttress with bearing pin by chock, its one end is buckled in again on angle steel, described angle steel is welded on the sidewall of steel lining backing plate, and the levels of described steel lining backing plate is close to each other by guide plate, and passes through buttress, cheater plate and angle steel group in place.
7. according to the on-the-spot welding and assembling method of nuclear power station steel lining backing plate described in claim 1 or 2, it is characterized in that: described vertical seam and circumferential weld adopt I type groove, the gap of described groove is 0～1mm, described tungsten argon arc automatic welder(welding machine) contains welding tractor, automatic welding wire reel, arc voltage tracking system and low-frequency pulse producer, and the weight of described automatic welding wire reel and diameter are respectively 5KG and Ф 1.2mm.
8. according to the on-the-spot welding and assembling method of nuclear power station steel lining backing plate described in claim 1 or 2, it is characterized in that: adopt monoblock type Windproof system, described monoblock type Windproof system is the inside and outside walkway board looping closed wind-proof shell with installation steel lining backing plate by steel lining backing plate, and comprises keel facility and protective equipment two parts; Described keel facility comprises the inside and outside support arranging along the inside and outside interval 200mm of steel lining backing plate; Described inside and outside support adopts steel pipe, and its termination bending forms to be linked up with and be fixed on the guardrail of inside and outside walkway board; Described protective equipment comprises by nylon rope and is bundled in the tarpaulin on the guardrail of inside and outside walkway board.
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| CN103280251B (en) * | 2013-05-06 | 2015-12-02 | 中国核工业华兴建设有限公司 | Nuclear power station stainless steel pond clad can assembly welding structure and automatic soldering method |
| CN107042366A (en) * | 2016-12-14 | 2017-08-15 | 柳州振业焊接机电设备制造有限公司 | The method of automatic welding |
| CN107030350A (en) * | 2017-06-19 | 2017-08-11 | 中建电力建设有限公司 | A kind of welding method of nuclear island Leak-tight liner baseplate molding |
| CN112589347B (en) * | 2020-12-03 | 2023-03-07 | 中国核工业二四建设有限公司 | Adjustment tool and system applied to integral assembly of steel lining modules of nuclear power station |
| CN114012219B (en) * | 2021-11-11 | 2023-02-03 | 中国核工业华兴建设有限公司 | Single-side welding and double-side forming MAG automatic welding method for installation of steel lining bottom plate of containment vessel of nuclear power station |
| CN114809270B (en) * | 2022-04-02 | 2023-11-14 | 中国核工业华兴建设有限公司 | Nuclear power station steel lining variable cross-section special-shaped lining plate structure and manufacturing method thereof |
| CN115007971A (en) * | 2022-06-22 | 2022-09-06 | 中国核工业华兴建设有限公司 | Single-side welding double-side forming laser tracking MAG automatic welding method for installation of nuclear power station containment steel lining cylinder and dome |
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| CN101918167B (en) * | 2007-05-04 | 2014-08-27 | 派雷内斯地下工程协会 | Method of making a liner for a pool, tank or containment enclosure |
| CN101829856B (en) * | 2010-04-14 | 2012-05-30 | 中国核工业二三建设有限公司 | Method for manufacturing superlarge spherical seal head |
| CN101967886B (en) * | 2010-11-16 | 2013-06-05 | 中国核工业第五建设有限公司 | Assembly and installation methods of steel containment vessel of nuclear power station |
| CN102061788B (en) * | 2010-11-09 | 2012-11-21 | 中国核工业华兴建设有限公司 | Method for mounting bottom plates and cylinder of steel lining of nuclear power plant |
| CN102071807B (en) * | 2011-01-12 | 2012-01-25 | 中国核工业华兴建设有限公司 | Nuclear power station steel lining modularized construction method |
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