CN114654054A - Automatic welding method for nuclear power passive containment cooling auxiliary water tank - Google Patents
Automatic welding method for nuclear power passive containment cooling auxiliary water tank Download PDFInfo
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- CN114654054A CN114654054A CN202011537950.XA CN202011537950A CN114654054A CN 114654054 A CN114654054 A CN 114654054A CN 202011537950 A CN202011537950 A CN 202011537950A CN 114654054 A CN114654054 A CN 114654054A
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- welding
- water tank
- auxiliary water
- nuclear power
- containment cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
Abstract
The invention belongs to a welding method, and particularly relates to an automatic welding method for a nuclear power passive containment cooling auxiliary water tank. It includes: step 1, machining a transverse welding position groove and a vertical welding position groove by adopting a machining mode; step 2, manufacturing a pairing tool fixture of the tank wall plate, and determining a mounting and fixing mode of the pairing tool; step 3, installing a welding track parallel to the welding seam, and installing a welding trolley on the welding track; step 4, starting up the equipment after the equipment is installed, and scanning and positioning the groove; step 5, selecting developed qualified welding process parameters or manual input parameters, and determining the type and proportion of the protective gas; step 6, starting welding, and firstly performing welding construction on a welding seam on the outer side of the tank wall by adopting automatic welding equipment under gas metal protection; and 7, performing weld joint back chipping treatment on the inner side to finish the welding construction of the weld joint on the inner side of the tank wall. The invention has the following remarkable effects: greatly improves the welding efficiency which is 2 to 3 times of that of manual shielded metal arc welding.
Description
Technical Field
The invention belongs to a welding method, and particularly relates to an automatic welding method for a nuclear power passive containment cooling auxiliary water tank.
Background
With the rapid development of nuclear power technology, the safety problem of nuclear power plants is more and more emphasized. The CAP1400 nuclear power station is used as an upgraded reactor type of AP1000 nuclear power, has larger capacity and is more concerned about safety, when a reactor has a loss of coolant accident or a main steam pipeline rupture accident, a large amount of radioactive steam is released into a containment vessel, and the temperature and the pressure in the containment vessel are rapidly increased. In order to prevent radioactive leakage due to ultrahigh temperature and high pressure of the containment, residual heat in the containment must be timely conducted out to ensure the integrity and tightness of the containment. The passive containment cooling system plays a role in providing a final heat trap, and in a design basis accident that the pressure or the temperature of the containment is increased, heat is led out, the pressure and the temperature in the containment are reduced, and the integrity of the containment under the accident condition is guaranteed.
A passive containment cooling auxiliary water tank (PCCAWST) of a nuclear power station is a vertical cylindrical carbon steel water tank and is formed by welding a plurality of submodules with different sizes. Taking CAP1400 nuclear power plant as an example, the material of the tank wall is SA-516M Gr.70 carbon steel, the total length of longitudinal welding seams and transverse welding seams in a unit is about 450 meters, the thickness is 18-38mm mostly, and the welding seams are long and straight butt welding seams mostly. In the field of nuclear power construction, most of the tank bodies with the thickness range are in traditional manual shielded metal arc welding, the welding efficiency is low, the welding quality is poor, and the influence of human factors is large.
Disclosure of Invention
The invention aims to provide an automatic welding method for a tank wall plate of a passive containment cooling auxiliary water tank, which aims to solve the problem of low construction efficiency of the existing manual welding of the tank wall plate of the passive containment cooling auxiliary water tank, improve the welding construction efficiency, shorten the engineering construction period of the passive containment cooling auxiliary water tank and reduce the installation cost of a nuclear power plant.
The invention is realized by the following steps: a consumable electrode gas shielded automatic welding method for a nuclear power passive containment cooling auxiliary water tank wall plate comprises the following steps:
step 5, selecting developed qualified welding process parameters or manual input parameters, and determining the type and proportion of the protective gas;
step 6, starting welding, namely adopting automatic gas metal arc welding equipment to perform welding construction on the welding seam on the outer side of the tank wall;
and 7, performing weld joint back chipping treatment on the inner side to finish the welding construction of the weld joint on the inner side of the tank wall.
The thickness of the tank wall plate of the passive containment cooling auxiliary water tank is 18-38mm, and the material is SA-516M Gr.70 carbon steel. The welding material is ER70S-6 with the specification of phi 1.2 mm.
Wherein the vertical welding groove is in a symmetrical X shape, the angle of a single-side groove is 30 degrees, the gap of the groove is 1-2mm, and the truncated edge is 0-1 mm.
Welding seams of a bottom layer are vertically welded, the welding current of the bottom layer is 135-145A, the welding voltage is 18-20V, the welding speed is 80-100mm/min, the swing frequency is 0.4-0.6Hz, the swing amplitude is 1.5-2.5mm, and the side wall retention time is 0.4-0.6 s.
The welding seam of the filling layer is vertically welded, the welding current of the filling layer is 145-170A, the welding voltage is 18-23V, the welding speed is 75-140mm/min, the swing frequency is 0.4-1.0Hz, the swing amplitude is 2.5-8.0mm, and the sidewall retention time is 0.3-0.6 s.
Welding seams of a cover layer are vertically welded, the welding current of the cover layer is 145-160A, the welding voltage is 18-21V, the welding speed is 70-100mm/min, the swing frequency is 0.3-0.5Hz, the swing amplitude is 6.0-8.5mm, and the sidewall retention time is 0.4-0.7 s.
Wherein the transverse welding groove is in a symmetrical X shape, the lower groove is 25-28 degrees, the upper groove is 33-35 degrees, the groove gap is 1-2mm, and the truncated edge is 0-1 mm.
Transversely welding a welding seam of a bottom layer, welding current 140-170A of the bottom layer, welding voltage 15-18V, 80-120mm/min, swing frequency 0.4-0.6Hz, swing amplitude 1.0-2.0mm and side wall retention time 0-0.5 s.
Transverse welding of a filling layer, welding current of the filling layer is 130-170A, welding voltage is 15-18V, welding speed is 170-250mm/min, swing frequency is 1.0-2.5Hz, swing amplitude is 0.5-2.0mm, and sidewall retention time is 0.1-0.3 s.
The welding seam of the cover surface layer is transversely welded, the welding current of the cover surface layer is 145-165A, the welding voltage is 15-17V, the welding speed is 70-100mm/min, the swing frequency is 0.3-0.6Hz, the swing amplitude is 0.5-2.0mm, and the retention time of the side wall is 0 s.
The invention has the following remarkable effects: 1) the welding efficiency of the consumable electrode gas shielded automatic welding method for welding thick plates is greatly improved and is 2-3 times that of manual shielded metal arc welding;
2) the passive containment cooling auxiliary water tank has high quality requirement, the method adopts a mechanical welding mode, the welding process is stable and reliable, the quality is high, and the welding seam is attractive in forming;
3) the method can effectively reduce the learning difficulty, the working difficulty and the intensity of welding operators;
drawings
FIG. 1 is a process diagram illustrating the method of construction,
FIG. 2 is a vertical weld groove diagram designed by the invention,
FIG. 3 is a transverse weld groove diagram designed by the present invention,
in the figure: 1-base material; 2, beveling; 3-vertical weld groove angle: 60 degrees; 5, the gap between the vertical weld assembly is 1-2 mm; 6-the angle of the lower groove of the transverse welding seam is 25-28 degrees; 7-the angle of the groove on the transverse weld is 33-35 degrees; 8, the gap between the transverse welding seam pair is 1-2 mm;
Detailed Description
In order that the embodiments of the present invention will be more clearly understood, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only for explaining the present invention and are not to be construed as limiting the present invention.
Taking an SA-516M Gr.70 material with the thickness of 18mm as an example, the automatic welding method of the nuclear power passive containment cooling auxiliary water tank comprises the following steps:
and step 3, installing the track and the welding trolley. A welding track is arranged in parallel to the welding line, and walking mechanisms such as a welding trolley and the like are arranged, wherein the distance between the center of the track and the welding line is 200-300 mm;
step 5, selecting the developed qualified vertical welding process parameters through equipment options, and inputting welding parameter parameters manually, and finally determining welding parameters, shielding gas types, proportions and the like;
and 6, welding the vertical welding seam. And (3) starting welding, adopting automatic welding equipment with gas metal protection to firstly carry out welding construction on the welding seam on the outer side of the tank wall, and then carrying out back gouging treatment on the welding seam on the inner side to finish the welding construction on the welding seam on the inner side of the tank wall.
and 8, welding the transverse welding seam. And (3) starting welding, adopting automatic welding equipment with gas metal protection to firstly carry out welding construction on the welding seam on the outer side of the tank wall, and then carrying out back gouging treatment on the welding seam on the inner side to finish the welding construction on the welding seam on the inner side of the tank wall.
Claims (11)
1. An automatic welding method for a nuclear power passive containment cooling auxiliary water tank is characterized by comprising the following steps:
step 1, machining a transverse welding position groove and a vertical welding position groove by adopting a machining mode;
step 2, manufacturing a pairing tool fixture of the tank wall plate, and determining a mounting and fixing mode of the pairing tool;
step 3, installing a welding track parallel to the welding seam, and installing a welding trolley on the welding track;
step 4, starting up the equipment after the equipment is installed, and scanning and positioning the groove;
step 5, selecting developed qualified welding process parameters or manual input parameters, and determining the type and proportion of the protective gas;
step 6, starting welding, namely adopting automatic gas metal arc welding equipment to perform welding construction on the welding seam on the outer side of the tank wall;
and 7, performing weld joint back chipping treatment on the inner side to finish the welding construction of the weld joint on the inner side of the tank wall.
2. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 1, characterized in that: the wall plate of the passive containment cooling auxiliary water tank has the thickness of 18-38mm and is made of SA-516M Gr.70 carbon steel.
3. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 2, characterized in that: the welding material for the tank wall plate of the passive containment cooling auxiliary water tank is ER70S-6 with the specification phi of 1.2 mm.
4. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 3, characterized in that: the vertical welding groove is in a symmetrical X shape, the angle of a single-side groove is 30 degrees, the gap of the groove is 1-2mm, and the truncated edge is 0-1 mm.
5. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 4, wherein the method comprises the following steps: welding seams of the bottom layer are vertically welded, the welding current of the bottom layer is 135-145A, the welding voltage is 18-20V, the welding speed is 80-100mm/min, the swing frequency is 0.4-0.6Hz, the swing amplitude is 1.5-2.5mm, and the sidewall retention time is 0.4-0.6 s.
6. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 5, wherein the method comprises the following steps: the welding seam of the filling layer is vertically welded, the welding current of the filling layer is 145-170A, the welding voltage is 18-23V, the welding speed is 75-140mm/min, the swing frequency is 0.4-1.0Hz, the swing amplitude is 2.5-8.0mm, and the sidewall retention time is 0.3-0.6 s.
7. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 6, characterized in that: welding seams of the cover layer are vertically welded, the welding current of the cover layer is 145-160A, the welding voltage is 18-21V, the welding speed is 70-100mm/min, the swing frequency is 0.3-0.5Hz, the swing amplitude is 6.0-8.5mm, and the side wall retention time is 0.4-0.7 s.
8. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 7, wherein the method comprises the following steps: the transverse welding groove is in a symmetrical X shape, the lower groove is 25-28 degrees, the upper groove is 33-35 degrees, the groove gap is 1-2mm, and the truncated edge is 0-1 mm.
9. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 8, characterized in that: transversely welding a welding seam of a bottom layer, welding current 140-170A of the bottom layer, welding voltage 15-18V, 80-120mm/min, swing frequency 0.4-0.6Hz, swing amplitude 1.0-2.0mm and side wall retention time 0-0.5 s.
10. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 9, wherein the method comprises the following steps: transverse welding of a filling layer, welding current of the filling layer is 130-170A, welding voltage is 15-18V, welding speed is 170-250mm/min, swing frequency is 1.0-2.5Hz, swing amplitude is 0.5-2.0mm, and sidewall retention time is 0.1-0.3 s.
11. The automatic welding method for the nuclear power passive containment cooling auxiliary water tank as claimed in claim 10, wherein the method comprises the following steps: the welding seam of the cover surface layer is transversely welded, the welding current of the cover surface layer is 145-165A, the welding voltage is 15-17V, the welding speed is 70-100mm/min, the swing frequency is 0.3-0.6Hz, the swing amplitude is 0.5-2.0mm, and the retention time of the side wall is 0 s.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011537950.XA CN114654054A (en) | 2020-12-23 | 2020-12-23 | Automatic welding method for nuclear power passive containment cooling auxiliary water tank |
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| CN202011537950.XA CN114654054A (en) | 2020-12-23 | 2020-12-23 | Automatic welding method for nuclear power passive containment cooling auxiliary water tank |
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| CN114654054A true CN114654054A (en) | 2022-06-24 |
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| CN202011537950.XA Pending CN114654054A (en) | 2020-12-23 | 2020-12-23 | Automatic welding method for nuclear power passive containment cooling auxiliary water tank |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11254131A (en) * | 1998-03-06 | 1999-09-21 | Ishikawajima Harima Heavy Ind Co Ltd | Vertical welding method |
| JP2003290921A (en) * | 2002-03-27 | 2003-10-14 | Hitachi Ltd | Multi-layer welding method, and multi-layer automatic welding equipment |
| CN101433997A (en) * | 2008-12-15 | 2009-05-20 | 中国水利水电第三工程局有限公司 | Trackless type self-protecting complete position automatic soldering device and welding process thereof |
| CN104551357A (en) * | 2014-12-19 | 2015-04-29 | 中国核工业二三建设有限公司 | Welding method for welding steel containment vessel of passive nuclear power plant |
| CN104625459A (en) * | 2014-12-19 | 2015-05-20 | 中国核工业二三建设有限公司 | Welding groove of passive nuclear power plant steel containment |
| CN105312741A (en) * | 2015-11-30 | 2016-02-10 | 哈尔滨理工大学 | TIP TIG welding method of LNG storage tanks |
-
2020
- 2020-12-23 CN CN202011537950.XA patent/CN114654054A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11254131A (en) * | 1998-03-06 | 1999-09-21 | Ishikawajima Harima Heavy Ind Co Ltd | Vertical welding method |
| JP2003290921A (en) * | 2002-03-27 | 2003-10-14 | Hitachi Ltd | Multi-layer welding method, and multi-layer automatic welding equipment |
| CN101433997A (en) * | 2008-12-15 | 2009-05-20 | 中国水利水电第三工程局有限公司 | Trackless type self-protecting complete position automatic soldering device and welding process thereof |
| CN104551357A (en) * | 2014-12-19 | 2015-04-29 | 中国核工业二三建设有限公司 | Welding method for welding steel containment vessel of passive nuclear power plant |
| CN104625459A (en) * | 2014-12-19 | 2015-05-20 | 中国核工业二三建设有限公司 | Welding groove of passive nuclear power plant steel containment |
| CN105312741A (en) * | 2015-11-30 | 2016-02-10 | 哈尔滨理工大学 | TIP TIG welding method of LNG storage tanks |
Non-Patent Citations (2)
| Title |
|---|
| 刘非;唐识;: "熔化极气体保护自动焊工艺在核电站钢制安全壳中的应用", 核动力工程, no. 03, pages 128 - 133 * |
| 杨丹霞;金伊凡;: "核电模块GMAW全自动焊焊接工艺", 焊接技术, no. 05, pages 51 - 54 * |
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