CN102398127B - Pipe internal inert gas protection cover for straight seam welding of large-diameter pipe - Google Patents
Pipe internal inert gas protection cover for straight seam welding of large-diameter pipe Download PDFInfo
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- CN102398127B CN102398127B CN201010274316.1A CN201010274316A CN102398127B CN 102398127 B CN102398127 B CN 102398127B CN 201010274316 A CN201010274316 A CN 201010274316A CN 102398127 B CN102398127 B CN 102398127B
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- seam welding
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Abstract
The invention discloses a pipe internal inert gas protection cover for straight seam welding of a large-diameter pipe. The pipe internal inert gas protection cover comprises a gas cover and a gas guide pipe of the gas cover, and an elastic gas cover bracket and a sliding rail trolley; the elastic gas cover bracket consists of a lever support consisting of a lever arm, and a middle support point seat of the lever arm, and a tension spring; the support point seat is arranged on one end face of a bottom plate of the sliding rail trolley; the front end of the lever arm is fixedly connected with the outer side of the gas cover; and the rear end of the lever arm is connected with the upper end of the tension spring which is positioned on the bottom plate of the sliding rail trolley. A gas cover support power spring which is directly positioned below the bracket originally and is directly subjected to high-temperature heat transfer is far away from a high temperature heat transfer area; meanwhile, a lever mechanism is made of a low-thermal-conductivity-coefficient material, so the heating of the spring is greatly reduced, and the service life of the spring is greatly prolonged; therefore, the long-term technical problem that the gas cover support power spring is heated and deformed so the gas protection device is low in efficiency is solved successfully, so that welding efficiency and quality are greatly improved and production cost is reduced.
Description
Technical field
the invention belongs to welding technology field, particularly relate to a kind of controlled atmosphere device in pipe weldering.
Background technology
in metal solder, particularly steel alloy welding, in order to prevent air intrusion molten drop and molten bath, the oxidation that as far as possible alleviates weld metal, one of measure of conventionally taking, adopts gas shield device exactly, discharges inert gas by welding region and air insulated.For example, in the time of the straight seam welding of big diameter stainless steel pipe, just adopt gas shield device in pipe at present, it is made up of gas hood, elasticity gas hood bracket, slide rail dolly and sliding rail frame.Sliding rail frame is placed in steel pipe, isometric with steel pipe, and slide rail dolly is installed on the guide rail of sliding rail frame, and is synchronized with the movement with welding gun under the effect of servomotor; And the elasticity gas hood bracket being installed on slide rail dolly is made up of supporting plate and support spring; under the elastic force effect of support spring; the oral area that makes to be installed on the gas hood on supporting plate more closely amplexiforms with welded tube welding seam welding region tube wall around all the time, thereby makes the weld metal of welding region obtain adequately protecting of the interior indifferent gas discharging of gas hood.But; in existing above-mentioned pipe, gas shield device has more serious defect; the high temperature producing while welding is easy to be delivered on support spring by gas hood, supporting plate; make spring at high temperature be out of shape, reduce elasticity; cause gas hood and tube wall not to seal and leak gas, thereby affecting weldquality.For a long time, although adopted many measures, comprise by high temperature resistant material and make spring or be coated with high-temperature resistant coating on spring surface, produce effects all very micro-.All, below 16 hours, because spring is short service life, not only had a strong impact on the usefulness of gas shield device the service life of the spring of various materials, and in work, the frequent spring of changing has also had a strong impact on welding efficiency, welding quality and production cost.
summary of the invention
object of the present invention, is that above-mentioned gas protective device is carried out to technological improvement, thus provide a kind of rational in infrastructure, use reliable and stable and life-span long drag cover for controlled atmosphere in the pipe of large-diameter pipe straight seam welding.
technical scheme of the present invention is: comprise gas hood and wireway thereof, elasticity gas hood bracket and slide rail dolly, lever support and extension spring that described elasticity gas hood bracket is made up of lever arm and intermediate support seat thereof form, intermediate support seat is installed on slide rail dolly base plate one end face, lever arm front end and gas hood outside are fixedly connected, and lever arm rear end is connected with the extension spring upper end being positioned on the little car bottom plate of slide rail.
as preferably, described intermediate support seat is to be made up of a counter-seat and the fixed axis that is connected between two stands.
as preferably, described lever arm is made up of the front arm of force and the rear arm of force, between the front arm of force and the rear arm of force, links into an integrated entity by the axle sleeve that can be socketed on fulcrum block fixed axis.
as preferably, the front arm of force of lever arm is U-shaped, and its U-shaped two ends are fixedly connected with gas hood two outsides respectively.
as preferably, described lever arm and intermediate support seat thereof all adopt the metal material of low thermal conductivity to make.
the metal material of described low thermal conductivity is preferably stainless steel material.
as preferably, described gas hood is that the barrel cover being connected by air guiding base and with air guiding base forms, the curved limit of periphery suitable for reading of barrel cover, and its radian and steel pipe inner wall radian match.
as preferably, in the two-tube access gas hood of described wireway with its horizontal U-shaped pipe, and on the little car bottom plate of slide rail, horizontal U-shaped pipe two medial surfaces of pressing close to be positioned at the wireway outside gas hood are provided with a pair of vertical spacing guide pillar.
as preferably, be positioned at the qi-emitting hole of offering on the wireway of gas hood and be left and right to and/or downward radially qi-emitting hole.
the invention has the beneficial effects as follows: will originally directly support with vertical support power spring the elasticity gas hood bracket that gas hood forms, change lever elasticity gas hood bracket into, the front arm of force with lever connects gas hood and the rear arm of force connection extension spring of lever, by lever using extension spring as gas hood supporting motive force, it reaches the effect of same resiliency supported gas hood, but makes the supporting motive force spring that is directly subject to high temperature heat transfer that is originally located immediately at bracket below away from high temperature heat transfer region; Simultaneously, leverage adopts low thermal conductivity material, further reduce being significantly heated of spring, greatly improve spring service life, thereby, successfully solve for a long time and caused because gas hood supporting motive force spring is out of shape by high temperature the technical barrier that gas shield device usefulness is low, thereby greatly improved welding efficiency, welding quality and reduced production cost; In addition, also change the qi-emitting hole vertically upward of offering on the wireway in gas hood into side direction qi-emitting hole, avoid welding slag to stop up the defect of qi-emitting hole, and make gas hood gas distribution more uniform and stable, further improved the gas shield effect of welding.
Brief description of the drawings
fig. 1 is that this device is installed on the cross section structure schematic diagram in steel pipe.
fig. 2 is the structural representation of facing of this device.
fig. 3 is the perspective view of this device.
fig. 4 is the lever arm arrangement schematic diagram of this device Elastic bracket.
Detailed description of the invention
below in conjunction with accompanying drawing, with embodiment, the invention will be further described.
drag a cover for controlled atmosphere in the pipe of large-diameter pipe straight seam welding, comprise gas hood 7 and wireway 6 thereof, elasticity gas hood bracket 5 and slide rail dolly 4.The barrel cover 72 that the present embodiment gas hood 7 is connected by air guiding base 71 and with air guiding base forms, the curved limit of periphery suitable for reading of barrel cover 72, and its radian and steel pipe inner wall radian match; In the two-tube access gas hood 7 of described wireway 6 with its horizontal U-shaped pipe, and on slide rail dolly 4 base plates, horizontal U-shaped pipe two medial surfaces of pressing close to be positioned at the wireway 6 outside gas hood 7 are provided with a pair of vertical spacing guide pillar 42, so that gas hood 7 can move up and down and off normal not along vertical spacing guide pillar 42; For the welding slag that the qi-emitting hole of the wireway in gas hood 7 is not fallen by top stops up, make gas hood gas distribution more even simultaneously, spy by be positioned at the qi-emitting hole (61) of offering on the wireway (6) of gas hood (7) be designed to left and right to and/or downward radially qi-emitting hole; Lever support and extension spring 52 that elasticity gas hood bracket 5 is made up of lever arm 53 and intermediate support seat 51 thereof form, the intermediate support seat 51 of the present embodiment is to be made up of a counter-seat 511 and the fixed axis 512 that is connected between two stands, and it is installed on slide rail dolly (4) base plate one end face; Described lever arm 53 is made up of with the rear arm of force 533 the front arm of force 531, between the front arm of force 531 and the rear arm of force 533, link into an integrated entity by the axle sleeve 532 being socketed on fulcrum block fixed axis 512, the front arm of force 531 of lever arm takes the shape of the letter U, its U-shaped two ends are fixedly connected with 7 liang of outsides of gas hood respectively, the rear arm of force 533 of lever arm is tabular, and plate bottom surface is connected with extension spring 52 upper ends that are positioned on slide rail dolly 4 base plates.Above-mentioned lever arm 53 and intermediate support seat 51 thereof all adopt the stainless steel material of low thermal conductivity to make, further to reduce as the temperature of the extension spring 52 of power.
when this application of installation, to be movably installed on the slide rail 31 of the support 3 being placed in welded pipe 1 by the roller 41 of slide rail dolly 4, be positioned at gas hood (7) on slide rail dolly 4 under the effect of elasticity gas hood bracket 5, dynamically cover pastes and is enclosed in around the weld seam welding section of inner wall of welded pipe, and under the control of electrical control gear, make slide rail dolly 4 follow the tracks of weld seam advanced in unison.
Claims (8)
1.
a kind ofly drag cover for controlled atmosphere in the pipe of large-diameter pipe straight seam welding, comprise gas hood (7) and wireway (6) thereof, elasticity gas hood bracket (5) and slide rail dolly (4), it is characterized in that lever support and extension spring (52) that elasticity gas hood bracket (5) is made up of lever arm (53) and intermediate support seat (51) thereof form, intermediate support seat (51) is installed on slide rail dolly (4) base plate one end face, lever arm (53) front end and gas hood (7) outside are fixedly connected, lever arm (53) rear end is connected with extension spring (52) upper end being positioned on slide rail dolly (4) base plate.
2.
drag cover by claimed in claim 1 for controlled atmosphere in the pipe of large-diameter pipe straight seam welding, it is characterized in that described intermediate support seat (51) is by a counter-seat (511) and is connected in fixed axis (512) between two stands and forms.
3.
drag cover by claimed in claim 1 for controlled atmosphere in the pipe of large-diameter pipe straight seam welding; it is characterized in that described lever arm (53) is made up of the front arm of force (531) and the rear arm of force (533), links into an integrated entity by the axle sleeve (532) that can be socketed on fulcrum block fixed axis (512) between the front arm of force (531) and the rear arm of force (533).
4.
drag cover by claimed in claim 3 for controlled atmosphere in the pipe of large-diameter pipe straight seam welding, it is characterized in that the front arm of force (531) of described lever arm takes the shape of the letter U, its U-shaped two ends are fixedly connected with gas hood (7) two outsides respectively.
5.
by dragging cover for controlled atmosphere in the pipe of large-diameter pipe straight seam welding described in claim 1 or 2 or 3 or 4, it is characterized in that described lever arm (53) and intermediate support seat (51) thereof all adopt the stainless steel material of low thermal conductivity to make.
6.
drag cover by claimed in claim 1 for controlled atmosphere in the pipe of large-diameter pipe straight seam welding; it is characterized in that gas hood (7) is to be made up of air guiding base (71) and the barrel cover (72) that is connected with air guiding base; the curved limit of periphery suitable for reading of barrel cover (72), its radian and steel pipe inner wall radian match.
7.
by dragging cover for controlled atmosphere in the pipe of large-diameter pipe straight seam welding described in claim 1 or 6; it is characterized in that in the two-tube access gas hood (7) of wireway (6) with its horizontal U-shaped pipe, and on slide rail dolly (4) base plate, horizontal U-shaped pipe two medial surfaces of pressing close to be positioned at the wireway (6) outside gas hood (7) are provided with a pair of vertical spacing guide pillar (42).
8.
drag cover by claimed in claim 7 for controlled atmosphere in the pipe of large-diameter pipe straight seam welding, it is characterized in that being positioned at the qi-emitting hole (61) offered on the wireway (6) of gas hood (7) for left and right to and/or downward radially qi-emitting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010274316.1A CN102398127B (en) | 2010-09-07 | 2010-09-07 | Pipe internal inert gas protection cover for straight seam welding of large-diameter pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010274316.1A CN102398127B (en) | 2010-09-07 | 2010-09-07 | Pipe internal inert gas protection cover for straight seam welding of large-diameter pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102398127A CN102398127A (en) | 2012-04-04 |
| CN102398127B true CN102398127B (en) | 2014-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010274316.1A Active CN102398127B (en) | 2010-09-07 | 2010-09-07 | Pipe internal inert gas protection cover for straight seam welding of large-diameter pipe |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862205B (en) * | 2014-03-31 | 2016-09-21 | 青岛玉兰祥商务服务有限公司 | The storage device of welding protection gas |
| CN105171211A (en) * | 2015-10-11 | 2015-12-23 | 桐城市丽琼金属制品有限公司 | Welding anti-oxidation protection device |
| CN107639331B (en) * | 2017-11-01 | 2023-07-28 | 广东省科学院中乌焊接研究所 | All-position plasma welding system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2419574B2 (en) * | 1973-04-26 | 1977-01-20 | Mitsui Shipbuilding & Engineering Co., Ltd., Tokio | DEVICE FOR CIRCULAR WELDING OF PIPES |
| KR100957682B1 (en) * | 2007-12-21 | 2010-05-12 | 현대중공업 주식회사 | The off shore pipe line automatic welding device for easy alignment of welding seam |
| CN201565707U (en) * | 2009-08-21 | 2010-09-01 | 浙江吉利汽车有限公司 | CO2 gas shield welder |
| CN201776578U (en) * | 2010-09-07 | 2011-03-30 | 浙江久立特材科技股份有限公司 | Inert gas protective dragging cover in tube for direct seam welding of major diameter tube |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59209480A (en) * | 1984-04-05 | 1984-11-28 | Kawasaki Heavy Ind Ltd | Welding device for cylindrical body |
| CN101596660A (en) * | 2009-06-12 | 2009-12-09 | 湖州丰泰不锈钢管业有限公司 | A kind of air support for welding straight beam pipe |
-
2010
- 2010-09-07 CN CN201010274316.1A patent/CN102398127B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2419574B2 (en) * | 1973-04-26 | 1977-01-20 | Mitsui Shipbuilding & Engineering Co., Ltd., Tokio | DEVICE FOR CIRCULAR WELDING OF PIPES |
| KR100957682B1 (en) * | 2007-12-21 | 2010-05-12 | 현대중공업 주식회사 | The off shore pipe line automatic welding device for easy alignment of welding seam |
| CN201565707U (en) * | 2009-08-21 | 2010-09-01 | 浙江吉利汽车有限公司 | CO2 gas shield welder |
| CN201776578U (en) * | 2010-09-07 | 2011-03-30 | 浙江久立特材科技股份有限公司 | Inert gas protective dragging cover in tube for direct seam welding of major diameter tube |
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| CN102398127A (en) | 2012-04-04 |
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