CN104772551A - Rubber film sealing coal gas cabinet bottom (top) plate welding method - Google Patents
Rubber film sealing coal gas cabinet bottom (top) plate welding method Download PDFInfo
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- CN104772551A CN104772551A CN201510128636.9A CN201510128636A CN104772551A CN 104772551 A CN104772551 A CN 104772551A CN 201510128636 A CN201510128636 A CN 201510128636A CN 104772551 A CN104772551 A CN 104772551A
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Abstract
The invention discloses a rubber film sealing coal gas cabinet bottom (top) plate welding method, which comprises the following steps of selecting welding specification parameters and welding technical requirements, welding middle plates in sequence and the like. The method has the advantages that the welding deformation and the instability deformation of a rubber film sealing coal gas cabinet bottom (top) plate can be effectively controlled, and the complicated process of re-repair after the welding completion in the prior art is omitted, so that on the basis of ensuring the welding quality, the integral construction quality of the rubber film sealing coal gas cabinet is greatly improved, meanwhile, the construction period is shortened, and the construction cost is reduced.
Description
Technical field
The present invention relates to a kind of welding method of metallurgy industry, in particular, the present invention relates to the welding method of (top) plate at the bottom of a kind of rubber film sealing gas chamber.
Background technology
In recent years, modernization mammoth conveter steel mill gets more and more, its supporting gas recovering device---and rubber film sealing gas chamber is also corresponding to be increased.
Rubber film sealing gas chamber belongs to a kind of thin-walled pressure vessel, and its cabinet base plate and cabinet top board all adopt Q235B steel making, and is formed by the steel plate butt welding of polylith thickness of slab 3.2mm, 4.5mm and 6mm, and welding procedure is complicated, and the requirement of welding quality is also very high.
Those skilled in the art all know, the cabinet base plate of rubber film sealing gas chamber with between side plate for twin fillet wolt is connected, due to stressed larger herein, the fillet weld size of twin fillet wolt is also larger, therefore easily produce larger convergent force at postwelding, suitable sequence of erection and welding must be adopted, otherwise, be easy to make to produce buckling deformation at the bottom of cabinet, thus leave ground and upwards arch upward up to hundreds of millimeter, so that increase the complicated processes of again repairing, one is that welding quality is difficult to ensure, two is delay the duration, and improves construction cost.
Summary of the invention
Object of the present invention is exactly that the welding method solving above-mentioned prior art easily makes (top) plate at the bottom of rubber film sealing gas chamber produce the problem of distortion, and provides the welding method of (top) plate at the bottom of a kind of new rubber film sealing gas chamber for this reason.The key of the method is the girth joint between gas chamber side plate with cabinet base plate is shunk more freely and does not involve the main body of gas chamber base plate.
At the bottom of rubber film sealing gas chamber of the present invention, the welding method of (top) plate comprises the following steps:
1. select the standard parameter of welding:
(1) selection core diameter is three kinds of welding rod weldings of Φ 2.5, Φ 3.2 and Φ 4.0, and wherein diameter is that the welding rod of Φ 2.5 is for positioning welding;
(2), when selecting manual electric arc welding, vertical position welding, horizontal position welding and overhead welding electric current are less than downhand welding electric current by about 10%, hydrogen controlled electrode electric current larger than acidic electrode electric current about 10%, and welding current match parameter is:
Core diameter: 2.5mm, electric current: 50 ~ 80A;
Core diameter: 3.2mm, electric current: 100 ~ 130A;
Core diameter: 4.0mm, electric current: 160 ~ 210A;
2. solder technology requires:
(1) striking requires strict, never allows non-solder position striking arbitrarily on tank plate surface and striking point must by the complete remelting of electric arc;
(2) can not extinguish arcs suddenly when weld seam end receives arc, should first welding rod stopping be moved forward and maintain a period of time, to fill up arc crater;
(3) manipulation of electrode during manual electric arc welding is that the symmetric transverse centered by weld line swings, and swing speed and width depend on required weld shape and size.
(4) welding rod inclination angle and welding bead joint style:
Docking, downhand welding, angle of heel 80 ~ 90 degree, top rake 10 ~ 15 degree;
Corner connection, horizontal position welding, angle of heel 45 degree, top rake 15 ~ 20 degree;
Corner connection, vertical position welding, angle of heel 35 ~ 55 degree, top rake 15 ~ 20 degree;
Corner connection, overhead welding, angle of heel 30 ~ 45 degree, top rake 10 ~ 15 degree.
3. central panel welding sequence:
(1) by the central plate two ends not positioning welding and both sides, position with the horizontal short circuit seam of the spacing of about 75mm to central panel in base plate and weld and make it to connect into some band shapes, but adjacent two pieces of central panel wouldn't be welded apart from the end that inner ring plate overlapping part is about 300mm place, stay not position simultaneously and weld X-shaped part and be fixed with jig.
(2) by central plate place, advance to periphery with the spacing of about 75mm, start the positioning welding of longitudinally long seam, but the part that the central panel end of periphery and inner ring plate overlap should retain about 700mm does not weld, corner cut be carried out to the most last layer plate of three pieces of central panel overlapping parts simultaneously.
(3) the formal welding of central panel in base plate: be that reverse rooms for manoeuvre of 250 ~ 300mm is welded to carry out being interrupted distance by center to the mode that periphery advances to the X-shaped part of fixing with jig, will repair immediately to the positioning welding be opened due to contraction in welding process.
(4) welding of base plate China and foreign countries ring flat-plate 1, middle ring flat-plate 2 and inner ring plate 3:
A. the radial joint of ring flat-plate and inner ring plate circumference in welding respectively, welds to same direction from 4 ~ 6 area segments of periphery simultaneously;
B. weld the seam that each overlapping the slot of described middle ring flat-plate and inner ring plate and described inner ring plate and central panel are positioned at circular arch end respectively, finally weld the overlapping the slot of X-shaped part circular arch end and inner ring plate;
C. described outer ring plate docked with described side plate and weld about 300mm;
D. with eight welder's circumference uniform distributions and the mode of radial symmetric carry out described outer ring plate and weld with the girth joint of described side plane contact part;
E. all the other weld seams on base plate are welded.
The present invention have selected the welding sequence of the most rational welding parameter and science the most, and overcome many defects of prior art, its beneficial effect is:
(1) owing to have employed X-shaped welding sequence to central panel, the welding deformation of (top) plate at the bottom of rubber film sealing gas chamber can effectively be controlled;
(2) because the girth joint between side plate and base plate can free shrink, effectively can control the buckling deformation on (top) at the bottom of rubber film sealing gas chamber, eliminate the complicated processes of again having repaired after having welded;
(3) due to the cause of (1), (2), ensure that welding quality, increased substantially the integral construction quality of rubber film sealing gas chamber, shortened the duration simultaneously, saved construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of (top) plate at the bottom of rubber film sealing gas chamber;
Fig. 2 be Fig. 1 China and foreign countries ring flat-plate and side plate weld schematic diagram;
Fig. 3 is the welding sequence schematic diagram of (top) plate at the bottom of gas chamber in the present invention;
Fig. 4 is that schematic diagram arranged by the jig of thick black line part in Fig. 3;
Three pieces of central panel overlapping part corner cut schematic diagrames when Fig. 5 is the welding of the end (top) plate;
Fig. 6 is gas chamber ring flat-plate welding sequence schematic diagram;
Fig. 7 is the welding direction schematic diagram of ring flat-plate entirety and local;
Fig. 8 is the welding direction schematic diagram of central panel entirety and local.
Detailed description of the invention
For making the present invention more easily be understood, below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in detail.
Fig. 1 shows the configuration state of (top) plate at the bottom of rubber film sealing gas chamber.
See Fig. 1, (top) plate at the bottom of described rubber film sealing gas chamber comprises outer ring plate 1 and the inner ring plate 3 of concentric, also comprise the middle ring flat-plate 2 be arranged between described outer ring plate 1 and inner ring plate 3, the inside of described inner ring plate 3 is provided with central panel 4, the edge of described outer ring plate 1 is provided with side plate 5, and the centre of described central panel 4 is provided with the central plate 6 not positioning welding.
Fig. 2 shows the welding manner of outer ring plate 1 described in Fig. 1 and side plate 5.
See Fig. 2, the side plate 5 being welded on described outer ring plate 1 edge is vertical with described outer ring plate 1.
Fig. 3 shows the welding sequence of (top) plate at the bottom of gas chamber; Fig. 4 shows the jig deployment scenarios of thick black line part in Fig. 3; Fig. 5 shows three pieces of central panel overlap joint corner cut situations when base plate welds; Fig. 6 shows the welding sequence of gas chamber ring flat-plate; Fig. 7 shows the welding direction of ring flat-plate whole and part; Fig. 8 shows the welding direction of central panel whole and part.
See Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, at the bottom of rubber film sealing gas chamber of the present invention, the welding method of (top) plate comprises the following steps:
1. select the standard parameter of welding:
(1) core diameter: gas chamber base plate and top board are the thin plate of δ≤6mm, diameter can be selected during welding to be three kinds of welding rod weldings of Φ 2.5, Φ 3.2 and Φ 4.0, and wherein diameter is that the welding rod of Φ 2.5 is for positioning welding;
(2) welding current: during manual electric arc welding, vertical position welding, horizontal position welding and overhead welding electric current are less than downhand welding electric current by about 10%, hydrogen controlled electrode electric current larger than acidic electrode electric current about 10%, and welding current match parameter used is as shown in the table:
Welding current matching parameter table
2. solder technology requires:
The operating technology butt welded seam quality of manual electric arc welding plays decisive role, and its content comprises striking, receives arc, manipulation of electrode, welding rod inclination angle and welding bead joint style etc.Welding for (top) plate at the bottom of described rubber film sealing gas chamber:
(1) striking requires strict, never allow the non-solder position striking arbitrarily on tank plate surface, and striking point must by the complete remelting of electric arc;
(1) can not extinguish arcs suddenly when weld seam end receives arc, should first welding rod stopping be moved forward and maintain a period of time, to fill up arc crater;
(2) can adopt arc manipulation in various manners during manual electric arc welding, the most frequently used manipulation of electrode is that the symmetric transverse centered by weld line swings, and swing speed and width depend on required weld shape and size;
(3) welding rod inclination angle and welding bead joint style are as following table:
Welding rod inclination angle and welding bead joint style table:
| Joint style | Welding position | Angle of heel (degree) | Top rake (degree) |
| Docking | Downhand welding | 80～90 | 10～15 |
| Corner connection | Horizontal position welding | 45 | 15～20 |
| Corner connection | Vertical position welding | 35～55 | 15～20 |
| Corner connection | Overhead welding | 30～45 | 10～15 |
3. central panel welding sequence:
(1) by central plate 6 two ends not positioning welding in Fig. 3 and both sides, position with the horizontal short circuit seam of the spacing of about 75mm to base plate and weld and make it to connect into some band shapes, but adjacent two pieces of central panel 4 wouldn't be welded apart from the end that inner ring plate 3 (three blocks of plates namely shown in Fig. 5) overlapping part is about 300mm place in described base plate, leave the X-shaped thick line portion shown in Fig. 3 simultaneously and do not position welding and be fixed with the jig arrangement shown in Fig. 4.
(2) after horizontal short circuit seam welding completes, start the positioning welding of longitudinally long seam, advance to periphery from central plate 6 with the spacing of about 75mm equally, but the part that central panel 4 end of periphery and inner ring plate 3 overlap should retain about 700mm and not weld, the base angle place of the most last layer central panel 4 of three pieces of plate overlaps simultaneously shown in Fig. 5 carries out corner cut.
(3) the formal welding of central panel 4 in base plate:
Weld to carry out interruption by center to the mode that periphery advances the X-shaped thick line portion fixed with jig in Fig. 3, interruption distance is 250 ~ 300mm, and order is the reverse room for manoeuvre welding shown in Fig. 8.In fig. 8, long arrow is to the right overall welding direction, and short arrow is left the local welding direction oppositely regressed.Can use as required during welding and suppress crooked fixture to prevent weld seam crooked, will repair immediately owing to shrinking the positioning welding be opened in welding process simultaneously.
(4) welding of base plate China and foreign countries ring flat-plate 1, middle ring flat-plate 2 and inner ring plate 3:
A. the radial joint of ring flat-plate 2 circumference and inner ring plate 3 circumference in welding respectively, welds to same direction from 4 ~ 6 area segments of periphery simultaneously;
B. respectively according to the welding sequence shown in Fig. 6, Fig. 7, weld the seam that each overlapping the slot of described middle ring flat-plate 2 and inner ring plate 3 and described inner ring plate 3 central panel 4 inner with it are positioned at circular arch end, finally weld the circular arch end of X-shaped thick line portion and the overlapping the slot of described inner ring plate 3 shown in Fig. 3;
C. described outer ring plate 1 docked with described side plate 5 and welds about 300mm, but should note: weld length herein more than 350mm, can not produce excessive stress influence to prevent the angle welding of described side plate 5 to perpendicular described outer ring plate 1;
D. carry out described outer ring plate 1 to weld with the girth joint of described side plate 5 contact portion, can distribute during welding 8 welders as shown in Figure 6 circumference uniform distribution and radial symmetric be arranged in around girth joint, weld simultaneously;
E. all the other weld seams on base plate are finally welded.
The welding method of (top) plate at the bottom of rubber film sealing gas chamber of the present invention, its welding key point is:
(1) reasonable, correct central panel and the welding sequence of ring flat-plate is adopted, eliminate the superposition in temperature field as far as possible, especially X-shaped welding sequence is adopted to central panel, for reduce in welding process shrink on the end (top) plate deformation extent to affect tool marginal;
(2) suitable welding parameter is selected, comprise the core diameter of manual electric arc welding standard parameter, welding current and arc voltage (arc length) and speed of welding, wherein with welding current and speed of welding for determining the main parameter of welding process heat input and weld metal performance;
(3) skillfully grasp striking, receive the welding operation technology of arc, manipulation of electrode and the specification such as welding rod inclination angle and welding bead joint style, ensure weldquality.
Facts have proved, the welding method of (top) plate at the bottom of rubber film sealing gas chamber of the present invention, effectively can control the welding deformation of (top) plate at the bottom of rubber film sealing gas chamber, the complicated processes also will again repaired after eliminating welding, thus increased substantially the integral construction quality of rubber film sealing gas chamber, shorten the construction period simultaneously, save construction cost.
Schematically describe technical scheme of the present invention with reference to drawings and Examples above, this description is not restricted.Those skilled in the art will be understood that in the application of reality, and the change in some details all may occur each step in the inventive method, and other staff also may make the technical scheme similar to it under its enlightenment.Special needs to be pointed out is: only otherwise depart from design aim of the present invention, all apparent variations in detail or similar Design, be all included within protection scope of the present invention.
Claims (1)
1. the welding method of (top) plate at the bottom of rubber film sealing gas chamber, is characterized in that: the method comprises the following steps:
(1) standard parameter of welding is selected:
1) selection core diameter is three kinds of welding rod weldings of Φ 2.5, Φ 3.2 and Φ 4.0, and wherein diameter is that the welding rod of Φ 2.5 is for positioning welding;
2), when selecting manual electric arc welding, vertical position welding, horizontal position welding and overhead welding electric current are less than downhand welding electric current by about 10%, hydrogen controlled electrode electric current larger than acidic electrode electric current about 10%, and welding current match parameter is:
Core diameter: 2.5mm, electric current: 50 ~ 80A;
Core diameter: 3.2mm, electric current: 100 ~ 130A;
Core diameter: 4.0mm, electric current: 160 ~ 210A;
(2) solder technology requires:
1) striking requires strict, never allows non-solder position striking arbitrarily on tank plate surface and striking point must by the complete remelting of electric arc;
2) can not extinguish arcs suddenly when weld seam end receives arc, should first welding rod stopping be moved forward and maintain a period of time, to fill up arc crater;
3) manipulation of electrode during manual electric arc welding is that the symmetric transverse centered by weld line swings, and swing speed and width depend on required weld shape and size;
4) welding rod inclination angle and welding bead joint style:
Docking, downhand welding, angle of heel 80 ~ 90 degree, top rake 10 ~ 15 degree;
Corner connection, horizontal position welding, angle of heel 45 degree, top rake 15 ~ 20 degree;
Corner connection, vertical position welding, angle of heel 35 ~ 55 degree, top rake 15 ~ 20 degree;
Corner connection, overhead welding, angle of heel 30 ~ 45 degree, top rake 10 ~ 15 degree;
(3) central panel welding sequence:
1) by the central plate two ends not positioning welding and both sides, position with the horizontal short circuit seam of the spacing of about 75mm to central panel in base plate and weld and make it to connect into some band shapes, but adjacent two pieces of central panel wouldn't be welded apart from the end that inner ring plate overlapping part is about 300mm place, stay not position simultaneously and weld X-shaped part and be fixed with jig;
2) by central plate place, advance to periphery with the spacing of about 75mm, start the positioning welding of longitudinally long seam, but the part that the central panel end of periphery and inner ring plate overlap should retain about 700mm does not weld, corner cut be carried out to the most last layer plate of three pieces of central panel overlapping parts simultaneously;
3) the formal welding of central panel in base plate: be that reverse rooms for manoeuvre of 250 ~ 300mm is welded to carry out being interrupted distance by center to the mode that periphery advances to the X-shaped part of fixing with jig, will repair immediately to the positioning welding be opened due to contraction in welding process;
4) welding of base plate China and foreign countries ring flat-plate 1, middle ring flat-plate 2 and inner ring plate 3:
A. the radial joint of ring flat-plate and inner ring plate circumference in welding respectively, welds to same direction from 4 ~ 6 area segments of periphery simultaneously;
B. weld the seam that each overlapping the slot of described middle ring flat-plate and inner ring plate and described inner ring plate and central panel are positioned at circular arch end respectively, finally weld the overlapping the slot of X-shaped part circular arch end and inner ring plate;
C. described outer ring plate docked with described side plate and weld about 300mm;
D. with eight welder's circumference uniform distributions and the mode of radial symmetric carry out described outer ring plate and weld with the girth joint of described side plane contact part;
E. all the other weld seams on base plate are welded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128636.9A CN104772551B (en) | 2015-03-23 | 2015-03-23 | Rubber film sealing coal gas cabinet bottom plate or top plate welding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128636.9A CN104772551B (en) | 2015-03-23 | 2015-03-23 | Rubber film sealing coal gas cabinet bottom plate or top plate welding method |
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| CN104772551A true CN104772551A (en) | 2015-07-15 |
| CN104772551B CN104772551B (en) | 2017-04-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019150855A (en) * | 2018-03-05 | 2019-09-12 | 三菱重工業株式会社 | Welding method and radioactive material storage device |
| CN112518162A (en) * | 2020-11-30 | 2021-03-19 | 上海宝冶冶金工程有限公司 | Alternate type segmented welding-removing anti-deformation method for gas chamber bottom plate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644060A (en) * | 2009-05-14 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Gas tank mat foundation connection structure and construction method |
| KR20120005077A (en) * | 2010-07-08 | 2012-01-16 | 현대중공업 주식회사 | Fabrication method of one side welding for lng tank by using backing material |
| CN103286465A (en) * | 2013-06-08 | 2013-09-11 | 中国十七冶集团有限公司 | Construction method for preventing welding deformation of converter gasholder base plate |
-
2015
- 2015-03-23 CN CN201510128636.9A patent/CN104772551B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644060A (en) * | 2009-05-14 | 2010-02-10 | 中冶赛迪工程技术股份有限公司 | Gas tank mat foundation connection structure and construction method |
| KR20120005077A (en) * | 2010-07-08 | 2012-01-16 | 현대중공업 주식회사 | Fabrication method of one side welding for lng tank by using backing material |
| CN103286465A (en) * | 2013-06-08 | 2013-09-11 | 中国十七冶集团有限公司 | Construction method for preventing welding deformation of converter gasholder base plate |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019150855A (en) * | 2018-03-05 | 2019-09-12 | 三菱重工業株式会社 | Welding method and radioactive material storage device |
| JP7085368B2 (en) | 2018-03-05 | 2022-06-16 | 三菱重工業株式会社 | Welding method and radioactive material containment vessel |
| CN112518162A (en) * | 2020-11-30 | 2021-03-19 | 上海宝冶冶金工程有限公司 | Alternate type segmented welding-removing anti-deformation method for gas chamber bottom plate |
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| CN104772551B (en) | 2017-04-19 |
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