WO2022078089A1 - 一种高合金大径管道焊接方法及其充氩保护装置 - Google Patents
一种高合金大径管道焊接方法及其充氩保护装置 Download PDFInfo
- Publication number
- WO2022078089A1 WO2022078089A1 PCT/CN2021/115492 CN2021115492W WO2022078089A1 WO 2022078089 A1 WO2022078089 A1 WO 2022078089A1 CN 2021115492 W CN2021115492 W CN 2021115492W WO 2022078089 A1 WO2022078089 A1 WO 2022078089A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- welding
- side edge
- argon
- alloy large
- pipeline
- Prior art date
Links
- 238000003466 welding Methods 0.000 title claims abstract description 95
- 239000000956 alloy Substances 0.000 title claims abstract description 30
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001681 protective effect Effects 0.000 title abstract 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 82
- 229910052786 argon Inorganic materials 0.000 claims description 41
- 239000007789 gas Substances 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000007493 shaping process Methods 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910002804 graphite Inorganic materials 0.000 claims description 5
- 239000010439 graphite Substances 0.000 claims description 5
- 239000002390 adhesive tape Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011111 cardboard Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
-
- 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
-
- 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
- B23K9/32—Accessories
-
- 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
- B23K9/32—Accessories
- B23K9/321—Protecting means
Definitions
- the invention relates to the technical field of high-alloy large-diameter pipeline welding, in particular to a high-alloy large-diameter pipeline welding method and an argon filling protection device.
- the conventional welding method is to fill the pipeline with argon gas, or use water-soluble paper or cardboard shell to paste and fix it in the pipeline to make a closed air chamber of about 20cm filled with argon gas, and keep the flow rate of argon gas to ensure The purity of the argon gas is until the bottom layer welding is completed.
- the present invention provides a high-alloy large-diameter pipeline welding method and an argon filling protection device, which can effectively solve the need to make a special gas chamber for argon-filling welding on the back of large-diameter pipeline GTAW, and need to continuously supply argon gas , the valve is easy to block during the operation of the unit, and it is not conducive to saving construction costs, energy conservation and environmental protection, and low construction efficiency.
- the technical means adopted by the present invention are as follows.
- the present invention discloses an argon filling protection device for welding high-alloy large-diameter pipelines, comprising: a V-shaped air chamber, an electromagnet and a power cord; wherein, the V-shaped air chamber is an arc-shaped structure matching the pipeline as a whole, And the two ends of the V-shaped air chamber are not connected.
- the cross-sectional structure of the V-shaped air chamber includes a V-shaped portion, a first side edge, a second side edge and a shaping strip, and the first side edge and the second side edge are respectively connected to the left and right sides of the upper edge of the V-shaped portion, And both the first side edge and the second side edge are perpendicular to the vertical central axis of the V-shaped portion.
- the shaping strip is a circular arc structure with the same radian as the first side edge and the second side edge, and is fixed on the lower surface of the side edge.
- a plurality of the electromagnets are uniformly fixed on the lower surfaces of the first side edge and the second side edge, and the power cord is connected to each electromagnet.
- V-shaped portion, the first side edge and the second side edge are all made of refractory graphite felt, which has good high temperature resistance and is easy to adapt to the high temperature environment brought by welding.
- the shaping strip is a steel strip, which is fixed on the lower surface of the side edge by means of screwing or riveting.
- the non-rigid refractory graphite felt is formed into a circular arc structure by the steel belt, so as to match the circular cross-sectional shape of the pipe.
- each of the steel strips is composed of two semicircular steel strips, and is connected by elastic steel strips 9 at the connection of the two semicircular steel strips, so as to better ensure the air chamber. radians and deviations.
- the electromagnet is fixed in the opening on the shaping strip to ensure the firmness of the electromagnet.
- the side edge of the electromagnet is thinned to ensure the suction force of the electromagnet.
- the total width of the V-shaped air chamber is 110-150 mm, wherein the width of the first side edge and the second side edge are both 30-45 mm, and the depth/height of the V-shaped portion is 15-20 mm.
- it also includes a main power line, and the power line connected to each electromagnet is connected to the main power line.
- V-shaped air chamber also includes a pulling rope parallel to the power line connected to the V-shaped air chamber, preferably a thin steel wire rope, so that the V-shaped air chamber can be pulled out from the power line side of the pipeline after welding.
- the present invention discloses a welding method for high-alloy large-diameter pipeline, comprising the following steps:
- step (2) the forward gas supply time of the welding torch is not less than 60s.
- step (2) the dwell time of the welding torch at the groove is 20s-30s.
- the set included angle is between 60° and 70°, which is conducive to argon gas blowing on the welded seam to form protection and avoid oxidation on the back of the welded seam.
- step (2) tape can be used to seal the groove from the outer surface of the pipe before welding, and only an area of 100mm-200mm length is left along the welding direction, and a small amount of tape is removed during the welding process. Completed, which not only ensures the air tightness of the gas chamber, but also ensures the purity of the argon protection on the back of the weld.
- FIG. 1 is a cross-sectional view of an argon-filling protection device for welding high-alloy large-diameter pipelines in an embodiment of the present invention.
- FIG. 2 is a top view of a side edge in an embodiment of the present invention.
- FIG. 3 is a schematic structural diagram of an argon-filling protection device for welding high-alloy large-diameter pipelines in an embodiment of the present invention.
- the marks in the above drawings respectively represent: 1-V-shaped air chamber, 1.1-V-shaped part, 1.2-first side edge, 1.3-second side edge, 1.4-setting strip; 2-electromagnet; 3-power cord; 4- main power cord; 5- pipe; 6- groove; 7- welding torch; 8- welding wire; 9- elastic steel belt.
- Terminology explanation part the terms "installation”, “connected”, “connected”, “fixed” and other terms in the present invention should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection, it can also be an electrical connection, it can be a direct connection, it can also be indirectly connected through an intermediate medium, it can be an internal connection between two elements, or an interaction relationship between two elements, for those of ordinary skill in the art. , the specific meanings of the above terms in the present invention can be understood according to specific situations.
- an example of a high-alloy large-diameter pipeline welding argon filling protection device includes: a V-shaped gas chamber 1, an electromagnet 2, a power line 3 and a main power line 4; wherein:
- the whole is an arc-shaped structure that matches the pipeline, and the two ends of the V-shaped air chamber 1 are not connected.
- the cross-sectional structure of the V-shaped air chamber 1 includes: V-shaped air chamber 1 1.1, the first side edge 1.2, the second side edge 1.3 and the shaping strip 1.4, the first side edge 1.2 and the second side edge 1.3 are respectively connected to the left and right sides of the upper edge of the V-shaped part 1.1, and the first Both the side edge 1.2 and the second side edge 1.3 are perpendicular to the vertical central axis of the V-shaped portion 1.1.
- the V-shaped portion 1.1, the first side edge 1.2, and the second side edge 1.3 are all made of refractory graphite felt, which has good high temperature resistance and is easy to adapt to the high temperature environment brought about by welding.
- the shaping strip 1.4 is a circular arc structure with the same radian as the first side edge 1.2 and the second side edge 1.3, and is fixed on the lower surface of the side edge.
- the main function of the electromagnet 2 is to tightly fix the V-shaped air chamber 1 on the inner wall of the pipeline to ensure the tightness of the air chamber.
- a plurality of the electromagnets 2 are evenly fixed on the lower surfaces of the first side edge 1.2 and the second side edge 1.3, and each electromagnet 2 is connected with the power cord 3, and each electromagnet 2 is connected to the power cord 3.
- the connected power lines 3 are all connected to the main power line 4 .
- the shaping strips 1.4 are steel strips, and the steel strips are two, respectively fixed on the lower surfaces of the first side edge 1.2 and the second side edge 1.3, and each strip is
- the steel strips are all composed of two semicircular steel strips, and are connected by a 0.2mm thick elastic steel strip 9 at the connection of the two semicircular steel strips, so as to better ensure the radian and deviation of the air chamber.
- the non-rigid refractory graphite felt is formed into a circular arc structure through the steel strip, so as to match the circular cross-sectional shape of the pipeline.
- the electromagnet 2 is fixed on the opening of the shaping bar 1.4 to ensure the firmness of the electromagnet 2 .
- the side edge of the electromagnet 2 is thinned to ensure the suction force of the electromagnet 2 .
- the protection device of the above embodiment is used to weld high-alloy large-diameter pipes, wherein the total width of the V-shaped air chamber 1 is 120 mm, wherein the first side edge 1.2, The width of the second side edge 1.3 is both 40mm, and the depth/height of the V-shaped portion 1.1 is 15mm.
- the welding process includes the following steps:
- tape Before welding, tape can be used to seal the groove 6 from the outer surface of the pipe, leaving only an area of 100mm-200mm in length along the welding direction. During the welding process, remove a small amount of tape and immediately weld until it is all completed, which not only guarantees The air tightness of the gas chamber ensures the purity of the argon protection on the back of the weld.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Description
Claims (16)
- 一种高合金大径管道焊接充氩保护装置,其特征在于,包括:V型气室,其整体为与管道匹配的圆弧形结构,且V型气室的两端不连接;所述V型气室的截面结构包括:V型部、第一侧缘、第二侧缘和定型条,其中:所述第一侧缘和第二侧缘分别连接在V型部的上边缘的左右两侧,且第一侧缘和第二侧缘均与V型部的竖向中轴线垂直;所述定型条为与第一侧缘、第二侧缘弧度相同的圆弧形结构,其固定在所述侧缘的下表面上;电磁铁,若干个电磁铁均匀固定在所述第一侧缘和第二侧缘的下表面处;电源线,每个所述电磁铁上均连接有所述电源线。
- 根据权利要求1所述的高合金大径管道焊接充氩保护装置,其特征在于,所述V型部、第一侧缘、第二侧缘均由耐火石墨毡制成。
- 根据权利要求1所述的高合金大径管道焊接充氩保护装置,其特征在于,所述定型条为钢带,其通过螺接或铆接的方式固定在所述侧缘的下表面。
- 根据权利要求3所述的高合金大径管道焊接充氩保护装置,其特征在于,所述钢带为两条,分别固定在第一侧缘、第二侧缘的下表面上。
- 根据权利要求4所述的高合金大径管道焊接充氩保护装置,其特征在于,每条所述钢带均由两个半圆形钢带组成,且在两个半圆形钢带的连接处通过弹性钢带进行连接。
- 根据权利要求1所述的高合金大径管道焊接充氩保护装置,其特征在于,所述电磁铁固定在定型条上的开孔中。
- 根据权利要求1所述的高合金大径管道焊接充氩保护装置,其特征在于,所述电磁铁处的侧缘进行减薄处理。
- 根据权利要求1-4任一项所述的高合金大径管道焊接充氩保护装置,其特征在于,所述V型气室的总宽度为110-150mm,其中,第一侧缘、第二侧缘的宽度均为30-45mm,V型部的深度/高度为15-20mm。
- 根据权利要求1-4任一项所述的高合金大径管道焊接充氩保护装置,其特征在于,还包括总电源线,每个电磁铁上连接的电源线均与所述总电源线连接。
- 根据权利要求1-4任一项所述的高合金大径管道焊接充氩保护装置,其特征在于,还包括连接在V型气室上的与电源线并行的牵拉绳。
- 根据权利要求10所述的高合金大径管道焊接充氩保护装置,其特征在于,所述牵拉绳为细钢丝绳。
- 一种高合金大径管道焊接方法,其特征在于,采用权利要求1-7任一项所述的高合金大径管道焊接充氩保护装置执行,包括如下步骤:(1)将上述的保护装置放入管道中,且使V型部位于管道的坡口下方,第一侧缘和第二侧缘分别位于管道的坡口的两侧,从而使V型气室罩在管道的焊接处;再给电磁铁通电使其紧密吸附在管道内壁上,检测V型气室的气密性,无问题后断开电磁铁的电源,将V型气室的两端对接并留下空隙后,再次给电磁铁通电使其紧密吸附在管道内壁上,完成气室的闭合;(2)采用氩弧焊打底,焊接时将焊枪放在坡口处停留;(3)开始焊接时,将焊丝放在坡口的间隙处,且焊枪与焊接行走的方向呈设定的夹角,直至焊接完毕。
- 根据权利要求12所述的高合金大径管道焊接方法,其特征在于,步骤(2)中,所述焊枪的前送气时间不少于60s。
- 根据权利要求12所述的高合金大径管道焊接方法,其特征在于,步骤(2)中,所述焊枪在坡口处停留时间为20s-30s。
- 根据权利要求12所述的高合金大径管道焊接方法,其特征在于,步骤(2)中,所述设定的夹角在60°至70°之间。
- 根据权利要求12-15任一项所述的高合金大径管道焊接方法,其特征在于,步骤(2)中,焊接前,用胶带从管道外表面将坡口密封,只沿着焊接方向留下100mm-200mm长度的区域即可,焊接过程中取掉部分胶带后立即焊接直至全部完。
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CN202011112701.6 | 2020-10-16 |
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CN112122740A (zh) * | 2020-10-16 | 2020-12-25 | 中国电建集团山东电力建设第一工程有限公司 | 一种高合金大径管道焊接方法及其充氩保护装置 |
CN113275715A (zh) * | 2021-05-08 | 2021-08-20 | 渤海造船厂集团有限公司 | 一种可视可测可调的背面焊缝成形充气保护装置及方法 |
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DE202010015678U1 (de) * | 2010-11-19 | 2011-04-21 | Schüller, Oliver | Formiervorrichtung für miteinander zu verschweißende Rohrabschnitte |
CN105522266A (zh) * | 2016-02-02 | 2016-04-27 | 云南昆船第一机械有限公司 | 一种筒体熔焊对接环缝背面气体保护装置 |
CN209491433U (zh) * | 2018-11-09 | 2019-10-15 | 中广核工程有限公司 | 核电站安全壳钢衬里焊缝背面防风保护装置 |
CN112122740A (zh) * | 2020-10-16 | 2020-12-25 | 中国电建集团山东电力建设第一工程有限公司 | 一种高合金大径管道焊接方法及其充氩保护装置 |
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JP4263021B2 (ja) * | 2003-05-22 | 2009-05-13 | 株式会社高田工業所 | 金属管の溶接方法 |
CN105499764B (zh) * | 2016-02-25 | 2017-10-17 | 江苏科技大学 | 一种手托式钛材钨极氩弧焊的尾部保护装置 |
CN107398624A (zh) * | 2017-08-02 | 2017-11-28 | 首都航天机械公司 | 一种适用于大直径输送管弹上焊接的焊接接头及焊接方法 |
CN208304209U (zh) * | 2018-05-07 | 2019-01-01 | 中国能源建设集团湖南火电建设有限公司 | 一种大中口径不锈钢管焊缝背面充氩装置 |
CN213257618U (zh) * | 2020-10-16 | 2021-05-25 | 中国电建集团山东电力建设第一工程有限公司 | 一种高合金大径管道焊接充氩保护装置 |
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Patent Citations (4)
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DE202010015678U1 (de) * | 2010-11-19 | 2011-04-21 | Schüller, Oliver | Formiervorrichtung für miteinander zu verschweißende Rohrabschnitte |
CN105522266A (zh) * | 2016-02-02 | 2016-04-27 | 云南昆船第一机械有限公司 | 一种筒体熔焊对接环缝背面气体保护装置 |
CN209491433U (zh) * | 2018-11-09 | 2019-10-15 | 中广核工程有限公司 | 核电站安全壳钢衬里焊缝背面防风保护装置 |
CN112122740A (zh) * | 2020-10-16 | 2020-12-25 | 中国电建集团山东电力建设第一工程有限公司 | 一种高合金大径管道焊接方法及其充氩保护装置 |
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