CN100545073C - Method for assembling and welding cased crane-beam in circular rail of nuclear-power station - Google Patents
Method for assembling and welding cased crane-beam in circular rail of nuclear-power station Download PDFInfo
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- CN100545073C CN100545073C CNB200710023135XA CN200710023135A CN100545073C CN 100545073 C CN100545073 C CN 100545073C CN B200710023135X A CNB200710023135X A CN B200710023135XA CN 200710023135 A CN200710023135 A CN 200710023135A CN 100545073 C CN100545073 C CN 100545073C
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Abstract
The present invention relates to a kind of assembling and welding method of cased crane-beam in circular rail of nuclear-power station, belong to nuclear station facility constructing technology field.This method comprises the blanking rectification, welds inside and outside web and dividing plate, welds the upper and lower edge of a wing and inside and outside web, the welding stiffener, and welded end plate, and correct each step behind the full weld.Above process for assembling and welding process is welded into H shape parts with web, inner reinforced plate assembling earlier, change traditional ∏ ellbeam step, can effectively reduce the integral solder deflection, help to guarantee the welding quality of subsequent members, the interim backboard that adopts during the end plate welding has then been controlled final welding deformation.Adopt processing step of the present invention, can effectively suppress welding deformation, make after the welding the ring hanging beam by simple rectification promptly safety can reach caryoplasm and protect 1 grade of strict demand with nuclear safety, and guarantee stablizing of build guality.
Description
Technical field
The present invention relates to a kind of assembling and welding method of load-carrying member, especially a kind of assembling and welding method of cased crane-beam in circular rail of nuclear-power station belongs to nuclear station facility constructing technology field.
Background technology
Develop rapidly along with Chinese national economy expects the year two thousand twenty, and the nuclear station generating capacity will be brought up to 3,600 ten thousand kilowatts from present 8,700,000 kilowatts.This means that the nuclear power construction will attain a new height in from now on 15 years.
In the construction of nuclear station, cased crane-beam in circular rail (being called for short the ring hanging beam) is one of important component in the nuclear island.The platform assembling is generally adopted in box girder assembling in the past usually, promptly with suspender the top flange is placed on the platform, sets a leg steel or a band steel on the web or the edge of a wing.For preventing the girder distortion, control gusset and be no more than permissible value with the squareness that combines limit and top flange of web, with gusset and location, top flange and welding, assemble web more then.The lower flange is assembled, welded to the П ellbeam that top flange, web and gusset are formed again.Though the ring hanging beam also is a box-structure, its complex inner structure and as caryoplasm protect 1 grade with the closely-related supporting member of nuclear safety, common process can't satisfy the manufacturing requirement.Therefore need a kind of actv. assembling and welding process, can satisfy its build guality requirement.
Retrieval is found, application number is that 200610201042.7 Chinese patent application discloses a kind of box-type section beam-column node structure and welding method thereof, better solved the setting and the welding of box-type section beam-column node, but this method can not solve the technical matters of cased crane-beam in circular rail assembling welding.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of method for assembling and welding cased crane-beam in circular rail of nuclear-power station that can satisfy the build guality requirement conscientiously, thereby adapt to the development of Future in China nuclear station.
The key that solves above technical matters is the control welding deformation, and the applicant gropes through testing repeatedly, sums up the processing step of following method for assembling and welding cased crane-beam in circular rail of nuclear-power station:
1), blanking is corrected---cut out the upper and lower edge of a wing by figure, inside and outside web, end plate and dividing plate, and each stiffener, and rectification;
2), welding inside and outside web and dividing plate---with dividing plate and outer web, endosternum group to fixing, the flat filled weld in front and back seam of skip welding (being intermittent weld) welding diaphragm, formation H shape welding assembly;
3), the upper and lower edge of a wing of welding and inside and outside web---outer web, endosternum and top flange, lower flange group to fixing, to the both sides skip welding, are formed the beam framework by the centre;
4), the welding stiffener---with each stiffener successively with beam framework group to fixing, begin to weld one by one by the centre towards both sides;
5), welded end plate---end plate and ring hanging beam group to after fixing, at the securing elongated direction of the end plate back side spot welding interim backboard opposite with the upper and lower edge of a wing, are successively welded end plate and inside and outside web and the upper and lower edge of a wing, and postwelding is removed interim backboard;
6), correct behind the full weld---with the weld seam full weld of intermittent weld, correct welding deformation.
Above process for assembling and welding process is welded into H shape parts with web, inner reinforced plate assembling earlier, change traditional П ellbeam step, can effectively reduce the integral solder deflection, help to guarantee the welding quality of subsequent members, the interim backboard that adopts during the end plate welding has then been controlled final welding deformation, the combination of these processing steps can effectively suppress welding deformation, make after the welding the ring hanging beam by simple rectification promptly safety can reach caryoplasm and protect 1 grade of strict demand with nuclear safety, and guarantee stablizing of build guality.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of one embodiment of the invention.
Fig. 2 is that the A-A of Fig. 1 is to view.
Fig. 3 is the B-B cutaway view of Fig. 1.
The specific embodiment
Embodiment one
The cased crane-beam in circular rail of nuclear-power station of present embodiment such as Fig. 1, Fig. 2, shown in Figure 3 are welded to each other and are constituted by top flange 1, lower flange 2, outer web 3, endosternum 4, end plate 5, first stiffener 6, second stiffener 7, vertical stiffener 8, the 3rd stiffener 9, the 4th stiffener 10, dividing plate 11.Intensity and shape after making, must satisfy caryoplasm protect 1 grade with the nuclear safety requirements for quality, so its key is when guaranteeing weld strength, strict controlled deformation.
Through experimental study repeatedly, drafted following concrete processing step.
Step 1: ring hanging beam part is prefabricated---and detail drawing is set type according to making, setting-out, the number of carrying out material, sign and blanking then.
Step 2: the setting-out of part---determine vertical stiffener by 1: 1 making arc model according to the part shape size.
Step 3: part blanking---according to accessory size, in steel plate on number material, blanking.
Step 4: part is corrected---take the circumstances into consideration to adopt hot and cold rectification for the overproof part of distortion.
Step 5: bevel for welding---the inside and outside web and the upper and lower edge of a wing and end plate weld are made level and smooth bevel for welding to system.
Step 6: the part group to, the welding
1) 11 groups on, outer web 3, endosternum 4 and dividing plate 11 welding---outer web 3, endosternum 4 and dividing plate are to after qualified, be fixed on the steel platform, adopt skip welding to distinguish the flat filled weld in front and back seam of welding diaphragm 11 simultaneously by 2 welders, square groove during welding forms H shape welding assembly;
2), the welding of top flange 1, lower flange 2, outer web 3, endosternum 4---2 groups of web 3, endosternum 4 and top flange 1, lower flanges are to after qualified outside, be placed on the jig, be distributed in the both sides of ring hanging beam by 4 welders, adopting backstep welding to combine with skip welding synchronously (is promptly begun by the centre, in first side, arrive opposite side again, return first side, return opposite side again ... welding manner) symmetry welds, and forms the beam framework;
3), the welding stiffener---at first with endosternum with vertically the stiffener group is to fixing, skip welding, backstep welding welding are by 4 synchronous symmetry operations of welder; Adopt again with the corresponding position of quadrat method and weld one by one stiffener 6,7,9,10 and beam framework;
4), welded end plate---end plate and ring hanging beam group to after fixing, at the fixing interim backboard of the end plate back side (please showing in the drawings) spot welding, are successively welded end plate and inside and outside web and last, the edge of a wing down, and postwelding is removed interim backboard;
5), end plate 5 and the welding of beam framework---in end plate 5 and ring hanging beam group to after qualified, weld seam between soldering part end plate 5 and the ring hanging beam, during welding, at one group of four thickness of the back side of part end plate 5 spot welding is interim backboard 12 more than the 30mm, vertical and the end sheet surface of each interim backboard, being parallel to each other equidistantly distributes, and bearing of trend is opposite with the upper and lower edge of a wing, can effectively prevent the welding deformation of end plate 5 like this; Postwelding is removed interim backboard.
More than welding all earlier with the bottoming of φ 3.2 welding rods, is welded with φ 4.0 welding rods, until reaching the required leg height of drawing design-calculated more again.Bottoming electric current I=150～180A, voltage U=26～30V, welding speed V=8～15cm/min is welded electric current I=180～220A again, voltage U=26～30V, welding speed V=9～15cm/min.About sublevel interval 400～500mm.
The member of all symmetrical distributions all adopts the mode that is symmetrically welded synchronously.
Step 7: correct behind the full weld---the laggard row of skip welding weld seam full weld is carried out straightening.Rectification can adopt the method for machinery and flame heat to carry out.The welding deformation of longitudinal seam adopts compression machine to correct between last lower flange and web, and the distortion at other position adopts the method for flame heat to correct.
Finish after the above step, eliminate rust again, follow-up work such as application, sign, packing.
Facts have proved, adopt the method for assembling and welding cased crane-beam in circular rail of nuclear-power station of present embodiment that rational combination step is combined with the welding process of science, and on many welding details, taked necessary innovative approach, therefore can be under the prerequisite of proof strength, suppress welding deformation, thereby the solid caryoplasm that reaches is protected 1 grade of standard-required with nuclear safety.And not according to correct like this processing step, then will cause welding deformation to be difficult to even can't correct, cause economic loss.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (8)
1. method for assembling and welding cased crane-beam in circular rail of nuclear-power station may further comprise the steps:
1), blanking is corrected---cut out the upper and lower edge of a wing by figure, inside and outside web, end plate and dividing plate, and each stiffener, and rectification;
2), welding inside and outside web and dividing plate---with dividing plate and outer web, endosternum group to fixing, the flat filled weld in front and back seam of skip welding welding diaphragm, formation H shape welding assembly;
3), the upper and lower edge of a wing of welding and inside and outside web---outer web, endosternum and top flange, lower flange group to fixing, to the both sides skip welding, are formed the beam framework by the centre;
4), the welding stiffener---with each stiffener successively with beam framework group to fixing, begin to weld one by one by the centre towards both sides;
5), welded end plate---end plate and ring hanging beam group to after fixing, at the securing elongated direction of the end plate back side spot welding interim backboard opposite with the upper and lower edge of a wing, are successively welded end plate and inside and outside web and the upper and lower edge of a wing, and postwelding is removed interim backboard;
6), correct behind the full weld---with the weld seam full weld of intermittent weld, correct welding deformation.
2. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 1, it is characterized in that: described skip welding weld seam is taked the welding manner that combines with backstep welding.
3. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 2, it is characterized in that: the member of symmetrical distribution adopts the mode that is symmetrically welded synchronously.
4. according to claim 2 or 3 described method for assembling and welding cased crane-beam in circular rail of nuclear-power station, it is characterized in that: described welding with the bottoming of φ 3.2 welding rods, is welded with φ 4.0 welding rods, until reaching required leg height earlier more again.
5. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 4, it is characterized in that: described bottoming welding electric current I=150～180A, voltage U=26～30V, welding speed V=8～15cm/min, described electric current I=180～the 220A that welds again, voltage U=26～30V, welding speed V=9～15cm/min.
6. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 5, it is characterized in that: the described inside and outside web and the upper and lower edge of a wing and end plate weld are shaped on level and smooth bevel for welding.
7. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 6, it is characterized in that: the sublevel interval 400～500mm of described skip welding.
8. according to the described method for assembling and welding cased crane-beam in circular rail of nuclear-power station of claim 7, it is characterized in that: the interim backboard in the described step 5) is one group, is parallel to each other equidistantly to distribute.
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