CN203276874U - Self-welding cladding assembly welding structure for stainless-steel water tank of nuclear power station - Google Patents
Self-welding cladding assembly welding structure for stainless-steel water tank of nuclear power station Download PDFInfo
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- CN203276874U CN203276874U CN 201320239351 CN201320239351U CN203276874U CN 203276874 U CN203276874 U CN 203276874U CN 201320239351 CN201320239351 CN 201320239351 CN 201320239351 U CN201320239351 U CN 201320239351U CN 203276874 U CN203276874 U CN 203276874U
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Abstract
The utility model relates to a self-welding cladding assembly welding structure for a stainless-steel water tank of a nuclear power station and an automatic welding method of the self-welding cladding assembly welding structure, and belongs to the technical field of nuclear power plant building. The self-welding cladding assembly welding structure comprises the cladding plates of both the bottom surface and the side walls of the rectangular stainless-steel water sink, wherein he cladding plates are formed by abutting seams; the outer edges of the cladding plates at the periphery of the bottom surface are welded with the bottom edges of the cladding plates below the side walls through a rectangular underframe wrap angle; the adjoining cladding plates of every two adjacent side walls are welded together through upright post wrap angles; the lower surfaces at the abutted seams of the cladding plates of the bottom surface and the outer surfaces of the cladding surfaces of the side walls are respectively lined with strip-shaped gasket sectional materials for the welding of end parts and a main body frame; the gasket sectional materials and a tank opening frame on the upper edges of the cladding plates of all the side walls are welded together to form the main body frame of the stainless-steel water tank; two backing welding seams generated by fillet welding are formed in an abutted seam groove which is formed by each strip-shaped gasket sectional material and every two adjacent cladding plates; sealed welding seams generated by filling welding and cosmetic welding are formed in the two backing welding seams. According to the self-welding cladding assembly welding structure, conditions for realizing efficient automatic argon tungsten-arc welding are created; the consistent welding quality is guaranteed.
Description
Technical field
The utility model relates to a kind of pond clad can assembly welding structure, and especially a kind of automatic welding nuclear power station stainless steel pond clad can assembly welding structure belongs to the nuclear power station technical field of buildings.
Background technology
Nuclear power station stainless steel pond is the container that nuclear fuel and spentnuclear fuel transport, store, and is full of boric acid water therebetween, consists of the barrier of nuclear activity.In the design and establishing of nuclear power station, the stainless steel pond belongs to the equipment that caryoplasm is protected I level, nuclear safety II level, the grade of its cladding boards field joint is the core one-level, postwelding need carry out 100% Non-Destructive Testing (wherein 100% radioscopy need be carried out in KX factory building spentnuclear fuel stainless steel pond) and seal (tightness)test, and welding quality requires very strict.
Cladding boards field erected quantities in nuclear power station stainless steel pond is large, and take CPR1000 nuclear power heap type as example, 1 CPR1000 unit has 5 stainless steel ponds.Existing above-mentioned stainless steel pond cladding boards is the butt-weld structure of groove, and there are flush joint, transverse joint and vertical seam in the position of weld seam, and fusion length amounts to and is about 1500 meters, and the welding job amount is large, and the quality control difficulty is very large.Understand according to the applicant, for a long time, all adopt GTAW technique both at home and abroad, there is following problem in on-the-spot groove welding:
1. the important welding parameter undulatory propertys such as arc voltage, speed of welding, wire feed rate are larger, strengthened the probability that the weld defectss such as incomplete fusion, pore, tungsten inclusion produce, stability and the consistance of weld seam inherent quality are relatively poor, and not only appearance of weld is attractive in appearance not, and quality is unstable.
2. the welding working condition is poor, intensity is high, is difficult to guarantee that welding process continues, the welding efficiency heavy discount, and the welding duration can't be guaranteed really.
Adopt automatic welding for existing stainless steel pond cladding boards without for the butt-weld structure of reasonable substrate, be difficult in theory realize, even operation reluctantly also can't guarantee welding quality.
Summary of the invention
The purpose of this utility model is: for the problem that prior art exists, a kind of nuclear power station stainless steel pond clad can assembly welding structure that is suitable for automatic welding is proposed, thereby for significantly improve work efficiency, assurance is stablized welding quality and is laid the foundation.
in order to reach above purpose, automatic welding nuclear power station stainless steel of the present utility model pond clad can assembly welding structure comprises that piece consists of the cladding boards of bottom surface, rectangle stainless steel pond and sidewall, the cladding boards outside of described base plate surrounding and the base of each sidewall lower vizor plate are by the welding of rectangle underframe cornerite, welding by the column cornerite respectively in abutting connection with cladding boards of each adjacent wall, the edge joint position lower surface of described bottom surface cladding boards and the outside surface of sidewall cladding boards are lined with respectively the strip liner section bar of end and main body frame welding, described liner section bar and the welding of pond mouth frame consist of stainless steel water tank main body framework, form weld seam in the piece groove of described strip liner section bar and the formation of adjacent cladding boards.
Further, described weld seam is made of the backing weld seam of twice fillet welding generation and the seal-weld on backing weld seam.
Further, described backing weld seam is the wire weld seam, and described seal-weld is for swinging weld seam.
Further again, described seal-weld fills weldering by twice and cosmetic welding generates.
because the utility model has not only mainly formed firm main body frame by members such as strip liner section bars, and formed stable piece groove with strip liner section bar and the cladding boards with substrate, therefore the angle seam in nuclear power station stainless steel pond or the piece groove between the cladding boards guide structure that all formed the safe arrangement of automatic welding device, thereby created condition for realizing efficient automatic tungsten anode argon arc welding, and the piece groove can add by fillet welding fills weldering formation with respect to the more reliable composite welds of common groove welding welding quality, thereby guarantee the welding quality of stable and consistent.In addition, strip liner section bar not only welds with main body frame, make it to be strengthened, and its length direction also is convenient to be fixed in the concrete foundation structure by equally distributed expansion bolt.
Description of drawings
Below in conjunction with accompanying drawing, the utility model is further described.
Fig. 1 is the structural representation of an embodiment of the utility model.
Fig. 2 is the welded structure schematic diagram of flush joint in Fig. 1 embodiment.
Fig. 3 is the welded structure schematic diagram of transverse joint in Fig. 1 embodiment.
Embodiment
Embodiment one
The present embodiment builds up by automatic tungsten anode argon arc welding nuclear power station stainless steel pond clad can assembly welding basic structure as shown in Figure 1, comprise that piece consists of bottom surface, rectangle stainless steel pond D(6mm corrosion resistant plate) and sidewall C-1, C-2, C-3, C-4(4mm corrosion resistant plate) cladding boards, the base of the cladding boards of base plate D surrounding outside and each sidewall C-1, C-2, C-3, C-4 lower vizor plate 1-X is by 3 welding of rectangle underframe cornerite, each adjacent wall weld (4mm corrosion resistant plate) by column cornerite 4-1,4-2,4-3,4-4 respectively in abutting connection with cladding boards.the edge joint position lower surface (referring to Fig. 2) of bottom surface D cladding boards and the outside surface (referring to Fig. 3) of sidewall C cladding boards are lined with respectively the strip liner section bar 6(6mm corrosion resistant plate of end and main body frame welding), each liner section bar 6 and pond mouth frame 5 welding that are positioned at each sidewall upper sheathing plate top consist of stainless steel water tank main body frameworks, the width that forms in strip liner section bar 6 and adjacent cladding boards is to have two backing weld seam 7-1 that fillet welding generates in 4-8mm piece groove, 7-2, have twice and fill weldering 7-3 on two backing weld seams, the seal-weld that 7-4 and cosmetic welding 7-5 generate.In figure, 8 for detecting the weld seam reserved window.
The automatic welding nuclear power station stainless steel pond clad can welding of the present embodiment adopts the automatic tungsten anode argon arc welding machine of outsourcing to complete following basic process:
The first step, strip liner section bar 6 and 5 welding of pond mouth frame of corresponding each cladding boards edge joint position are consisted of stainless steel water tank main body frameworks;
Second step, with rectangle underframe cornerite 3, the column cornerite 4-1 that is positioned at underframe cornerite surrounding, 4-2,4-3,4-4 and main body frame welding;
The 3rd step, cladding boards is in place, in the wide piece groove of the 4-8mm that adjacent cladding boards and strip liner section bar form, with fillet welding generation two backing weld seam 7-1,7-2;
The 4th goes on foot, carries out twice on two backing weld seams fills weldering 7-3,7-4 and cosmetic welding 7-5 generation seal-weld;
The 5th goes on foot, the cladding boards outside of base plate D surrounding and the base of each sidewall C lower vizor plate 1-X is welded with rectangle underframe cornerite 3 respectively, with welding with the column cornerite respectively in abutting connection with the cladding boards edge of each adjacent wall, and complete the soldering of thin section everywhere, until form complete nuclear power station stainless steel pond.
In above process, the tungsten electrode diameter that fillet welding is used is 2.4mm, and tungsten electrode front-end platform diameter is 0～0.5mm; Wire feed not in welding process makes adjacent stainless steel mother metal---be the both sides cladding boards respectively with strip liner section bar from fusion, form from fusing backing weld seam 7-1,7-2, thereby effectively avoid the generation of root incomplete fusion defective.Be conventional string beading from the fusion weldering, the scope of electric current is 120～170A, and the scope of arc voltage is 7～10V, and the speed of welding is 12～18cm/min.
During sealing (filling and capping) weldering, the tungsten electrode diameter is selected 3.2mm, and tungsten electrode front-end platform diameter is 0.5～1mm.Employing dish welding equipment silk, diameter is 1.2mm.weldering 7-3 is filled in the inside of seal-weld, 7-4 adopts weave bead welding, in the weave bead welding process, pulse current swings synchronous with electric arc, when being rocked to the weld seam both sides, electric arc slightly stops, retention period is peak point current, be background current the process of electric arc from a side oscillation to opposite side, the concrete scope of setting current peak is 140-200A, the scope of electric current base value is 90-180A, the scope of arc voltage is 8-11V, the speed of welding is 9-13cm/min, electric arc is 0.1-0.3s in the residence time of weld seam both sides, the width of electric arc from weld seam one side oscillation to the weld seam opposite side is 1-3mm, the speed of electric arc from a side oscillation to the weld seam opposite side is 7-21mm/s.The cosmetic welding 7-5 of seal-weld also adopts weave bead welding, design parameter is that the scope of current peak is 130-170A, the scope of electric current base value is 80-160A, the scope of arc voltage is 8-12V, the speed of welding is 8-12cm/min, electric arc is 0-0.3s in the residence time of weld seam both sides, and the width of electric arc from weld seam one side oscillation to the weld seam opposite side is 2-5mm, and the speed of electric arc from a side oscillation to the weld seam opposite side is 10-25mm/s.
Facts have proved, the nuclear power station stainless steel pond cladding boards of the present embodiment automatic tungsten anode argon arc welding has following remarkable advantage with respect to existing GTAW technology:
1) welding parameter of automatic welding process is stable, welding process is continuous, has improved weld seam inherence and presentation quality and has guaranteed its stability.
2) can realize the continuous welding of long weld seam, built-up time can shorten 10～15 days, and the whole duration can shorten approximately 1 month, has greatly improved work efficiency.
3) welding operation is simple and easy grasps, and has avoided the impact of human factor welding quality, has reduced welder's training cost.
4) not only with the wire feed seal weld reasonable combination that certainly fuses fillet welding and swing of wire, and under theory instructs repetition test, summarize all multi-control parameters that is mutually related, therefore can form high-quality weld seam with getting twice the result with half the effort.
Claims (4)
1. automatic welding nuclear power station stainless steel pond clad can assembly welding structure, comprise that piece consists of the cladding boards of bottom surface, rectangle stainless steel pond and sidewall, the cladding boards outside of described base plate surrounding and the base of each sidewall lower vizor plate are by the welding of rectangle underframe cornerite, welding by the column cornerite respectively in abutting connection with cladding boards of each adjacent wall, it is characterized in that: the edge joint position lower surface of described bottom surface cladding boards and the outside surface of sidewall cladding boards are lined with respectively the strip liner section bar of end and main body frame welding, described liner section bar and the welding of pond mouth frame consist of stainless steel water tank main body framework, form weld seam in the piece groove of described strip liner section bar and the formation of adjacent cladding boards.
2. automatic welding nuclear power station stainless steel pond clad can assembly welding structure according to claim 1 is characterized in that: the backing weld seam that described weld seam is generated by the twice fillet welding and the seal-weld on backing weld seam consist of.
3. automatic welding nuclear power station stainless steel pond clad can assembly welding structure according to claim 2, it is characterized in that: described backing weld seam is the wire weld seam, described seal-weld is for swinging weld seam.
4. automatic welding nuclear power station stainless steel pond clad can assembly welding structure according to claim 3, it is characterized in that: described seal-weld is filled weldering and cosmetic welding generation by twice.
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| CN 201320239351 CN203276874U (en) | 2013-05-06 | 2013-05-06 | Self-welding cladding assembly welding structure for stainless-steel water tank of nuclear power station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280251A (en) * | 2013-05-06 | 2013-09-04 | 中国核工业华兴建设有限公司 | Nuclear power station stainless steel pool covering face assembling and welding structure and automatic welding method |
| CN107511559A (en) * | 2017-09-06 | 2017-12-26 | 中国核工业华兴建设有限公司 | A kind of nuclear power station two phase stainless steel pond clad can installation method and welding procedure |
| CN108172313A (en) * | 2017-12-25 | 2018-06-15 | 中国建筑第二工程局有限公司 | Used in nuclear power station stainless steel pond and welding method |
| CN113062411A (en) * | 2021-03-26 | 2021-07-02 | 深圳中广核工程设计有限公司 | Ultra-large annular concrete stainless steel water tank and manufacturing method thereof |
-
2013
- 2013-05-06 CN CN 201320239351 patent/CN203276874U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103280251A (en) * | 2013-05-06 | 2013-09-04 | 中国核工业华兴建设有限公司 | Nuclear power station stainless steel pool covering face assembling and welding structure and automatic welding method |
| 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 |
| CN107511559A (en) * | 2017-09-06 | 2017-12-26 | 中国核工业华兴建设有限公司 | A kind of nuclear power station two phase stainless steel pond clad can installation method and welding procedure |
| CN107511559B (en) * | 2017-09-06 | 2020-10-20 | 中国核工业华兴建设有限公司 | Installation method and welding process for double-phase stainless steel pool cover of nuclear power station |
| CN108172313A (en) * | 2017-12-25 | 2018-06-15 | 中国建筑第二工程局有限公司 | Used in nuclear power station stainless steel pond and welding method |
| CN113062411A (en) * | 2021-03-26 | 2021-07-02 | 深圳中广核工程设计有限公司 | Ultra-large annular concrete stainless steel water tank and manufacturing method thereof |
| CN113062411B (en) * | 2021-03-26 | 2022-05-31 | 深圳中广核工程设计有限公司 | Ultra-large annular concrete stainless steel water tank and manufacturing method thereof |
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Granted publication date: 20131106 |