CN202951961U - Circumferential weld submerged-arc welding device for butt-joint of steel pipes - Google Patents

Circumferential weld submerged-arc welding device for butt-joint of steel pipes Download PDF

Info

Publication number
CN202951961U
CN202951961U CN 201220697814 CN201220697814U CN202951961U CN 202951961 U CN202951961 U CN 202951961U CN 201220697814 CN201220697814 CN 201220697814 CN 201220697814 U CN201220697814 U CN 201220697814U CN 202951961 U CN202951961 U CN 202951961U
Authority
CN
China
Prior art keywords
portal frame
rotating roller
steel pipe
arc welding
welding device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201220697814
Other languages
Chinese (zh)
Inventor
郑青昊
祁超
王海生
石国红
潘强
黄喜友
牟新华
吴强
李建明
江渊
周书亮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North China Petroleum Steel Pipe Co ltd
China National Petroleum Corp
CNPC Bohai Equipment Manufacturing Co Ltd
Original Assignee
NORTH CHINA PETROLEUM STEEL PIPE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NORTH CHINA PETROLEUM STEEL PIPE CO Ltd filed Critical NORTH CHINA PETROLEUM STEEL PIPE CO Ltd
Priority to CN 201220697814 priority Critical patent/CN202951961U/en
Application granted granted Critical
Publication of CN202951961U publication Critical patent/CN202951961U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Arc Welding In General (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The utility model discloses a circumferential weld submerged-arc welding device for butt-joint of steel pipes and belongs to the technical field of welding. The circumferential weld submerged-arc welding device comprises an outside welding device, an inside welding car, a lower cross-shaped rotating roller set, a fixed portal frame and a movable portal frame, wherein the fixed portal frame and the movable portal frame are respectively arranged on two sides of the outside welding device; a steel pipe importing device and a steel pipe transverse moving device are arranged on the left side of the movable portal frame; the inside welding car is arranged on the right side of the fixed portal frame; and the lower cross-shaped rotating roller set is arranged between the inside welding car and the fixed portal frame. By utilizing the circumferential weld submerged-arc welding device, an inside and outside submerged-arc welding manner is adopted, the welding work of a circumferential weld is carried out along the pipe ends of two sections of steel pipes needing butt-joint, the circumferential weld meets standard requirements, the steel pipes which do not meet the requirements of the standard length can be processed into a butt-joint steel pipe meeting the standard requirements, and the production cost of a use unit can be greatly reduced.

Description

A kind of steel pipe docking girth joint submerged arc welding device
Technical field
The utility model relates to a kind of steel pipe docking and uses welding equipment, belongs to welding technology field, especially a kind of steel pipe docking girth joint submerged arc welding device.
Background technology
At present, at steel pipe, manufacture field, along with the continuous increase of steel pipe caliber and wall thickness, the contradiction between coiled sheet weight and steel pipe length.As volume, heavily to depart from ideal value larger, must produce pup joint, causes the reduction of lumber recovery.And in process of production, a lot of steel pipes are arranged because local body misalignment exceeds standard, the reasons such as defect reconditioning wall thickness exceeds standard, mother metal defect do not cause steel pipe length up to standard and demote, greatly reduce lumber recovery.And API 5L(44 version) in standard, allowing provides head tube by agreement, in the second west to east gas pipeline project technical conditions and Central Asia pipeline technology condition, also allows to provide butt tube.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of steel pipe docking and uses the girth joint submerged arc welding device, and this installs by inside and outside submerged arc welding mode, carry out the girth joint welding job along two sections pipe ends that need docking, and girth joint meets standard-required.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of steel pipe docking girth joint submerged arc welding device, it is characterized in that comprising outer welder, interior weldering dolly, lower cross rotating roller group, fixedly portal frame and movable portal frame, described fixedly portal frame and movable portal frame are arranged at respectively the both sides of outer welder, the left side of described movable portal frame is provided with input steel pipe device and traversing steel pipe device, fixedly the right side of portal frame is provided with interior weldering dolly, at interior weldering dolly and fixedly between portal frame, be provided with lower cross rotating roller group.
Said structure is described further, described interior weldering dolly comprises cantilever, supporting trolley and travel mechanism, base and interior soldering tip, one end of described cantilever is connected with supporting trolley and travel mechanism, the other end of cantilever is connected with interior soldering tip, supporting trolley and travel mechanism are placed on base, also are provided with counterweight in supporting trolley and travel mechanism.
Said structure is described further, described movable portal frame comprises the portal frame framework and is arranged at the horizontal sliding bottom of portal frame base of frame, described horizontal sliding bottom is provided with a pair of lower rotating roller, the side of lower rotating roller is provided with earthing brush, the middle part of portal frame framework is provided with the upper rotating roller elevating mechanism that drives a pair of upper rotating roller to move up and down, the side of described upper rotating roller is provided with angle-adjusting mechanism, and described horizontal sliding bottom is connected with the oil cylinder of being located at portal frame framework side.
Said structure is described further, described outer welder comprises outer soldering tip, frames, sliding skateboard, cross sliding board, slide plate elevating mechanism, one side of described frames is provided with the slide plate elevating mechanism, described slide plate elevating mechanism is provided with sliding skateboard and cross sliding board, and outer soldering tip is fixedly connected with cross sliding board.
The beneficial effect that adopts technique scheme to produce is: in the utility model adopts, outer submerged-arc welding girth joint docking mode, by the fixing steel pipe of the upper rotating roller on portal frame and lower rotating roller, realize the adjustment of pipe end docking location by the adjustment to the movable portal frame position, adjust interior weldering bond pad locations by the adjustment of the little truck position of interior weldering and boom angle, by the outer solder joint of cross sliding board adjustment position, complete the conveying of steel pipe pipeline section and the work that rotates in a circumferential direction by upper rotating roller and lower rotating roller, this welding equipment can process the steel pipe that does not meet the full-length requirement docking steel pipe of compound standard-required, can reduce to a great extent the production cost of applying unit.
The accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is structural representation of the present utility model;
In figure 1, input steel pipe device, 2, traversing steel pipe device, 3, movable portal frame, 4, outer welder, 5, fixing portal frame, 6, lower cross rotating roller group, 7, interior weldering dolly;
Fig. 2 is the structural representation of interior weldering dolly;
Soldering tip in 7-1. in figure, 7-2, cantilever, 7-3, base, 7-4, supporting trolley and travel mechanism, 7-5, counterweight, 7-6, bracing frame, 7-7, adjusting jack;
Fig. 3 is the movable portal frame structural representation;
3-1. portal frame framework in figure, the upper rotating roller elevating mechanism of 3-2., 3-3. earthing brush, rotating roller under 3-4., the horizontal sliding bottom of 3-5., the upper rotating roller of 3-6., 3-7. oil cylinder, 3-8. angle-adjusting mechanism;
Fig. 4 is outside weld apparatus structure schematic diagram;
Fig. 5 is the left view of Fig. 4;
4-1. frames in figure, 4-2. sliding skateboard, 4-3. cross sliding board, 4-4. slide plate elevating mechanism, the outer soldering tip of 4-5..
The specific embodiment
Known with reference to the accompanying drawings the utility model is specifically related to a kind of steel pipe docking girth joint submerged arc welding device, in this equipment is used, outer submerged-arc welding girth joint docking mode, by the fixing steel pipe of the upper rotating roller 3-6 on portal frame and lower rotating roller 3-4, realize the adjustment of pipe end docking location by the position adjustment to movable portal frame 3, interior weldering bond pad locations is adjusted in adjustment by interior weldering dolly 7 positions and cantilever 7-2 angle, adjust outer solder joint position by cross sliding board 4-3, complete the conveying of steel pipe pipeline section and the work that rotates in a circumferential direction by upper rotating roller 3-6 and lower rotating roller 3-4.Adopt fixing lower rotating roller 3-4 and liftable upper rotating roller 3-6 group to fix the steel pipe pipeline section, and when welding, pipe end is rotated to work.The rotating roller group is adjusted rotating speed by servomotor.The rotating roller group of one side is fixed on movable portal frame 3, and this side roller group can all around be finely tuned, and the lower rotating roller liftable of this roller group, in order to regulate the docking location of two sections steel pipes.
Below in conjunction with accompanying drawing, occupation mode of the present utility model is described.
1 is known with reference to the accompanying drawings, and traversing steel pipe device 2, conveying steel pipe device 1 that the pipeline section that need to dock passes through enter the mating operation zone with lower cross rotating roller group 6.After two sections steel pipes that need to dock enter station, movable portal frame 3 and fixedly the upper rotating roller of portal frame 5 depress, two sections steel pipes are fixed, and upper rotating roller and lower cross rotating roller 6, by steel pipe rotary, are carried out the girth joint welding job by the interior soldering tip 7-1 on interior weldering dolly 7 and outer welder 4.
Interior weldering dolly shown in Fig. 2, base 7-3 fixes on the ground, and supporting trolley and the 7-4 of travel mechanism are placed on above base 7-3.The movement of certain limit before and after supporting trolley and the 7-4 of travel mechanism can carry out with cantilever 7-2, so that the position of soldering tip 7-1 in regulating.Supporting trolley is moved forward and backward by oil cylinder, and cylinder pedestal is fixed on base 7-3.Cantilever 7-2 carrys out counterpoise by counterweight 7-5, carries out height fine adjusting function by regulating jack 7-7, and is fixed by bracing frame 7-6.Be integrated with welding wire feeding mechanism, flux delivery and recovery tube etc. in cantilever 7-2, interior soldering tip 7-1 is integrated with welding gun, angle of welding gun governor motion wire feeder, solder flux outlet and reclaims mouth etc.
Movable portal frame shown in Fig. 3, oil cylinder 3-7 can promote portal frame framework 3-1 and laterally horizontally slip on sliding bottom 3-5, upper rotating roller 3-6 descends by upper rotating roller elevating mechanism 3-2, after together with lower rotating roller 3-4, that pipeline section is fixing, whole portal frame can drive the pipe end of this side pipe section and do a small amount of transverse shifting, so that alignment needs two mouths of pipe of docking.During welding, earthing brush 3-3 contacts with steel pipe, plays the ground connection effect, and when entering to manage and going out to manage, brush is opened by cylinder, with tube wall, does not contact.Upper rotating roller 3-6 is driven by servomotor, adjustable rotary speed, upper rotating roller can be adjusted angle by angle-adjusting mechanism 3-8, this mechanism rotates and adjusts angle by internal gear, can make rotatable roll shaft to perpendicular or parallel in steel shaft to.Upper rotatable roll shaft to vertical and steel shaft to the time, provide power for passing in and out steel pipe, be parallel to steel shaft to the time, for steel pipe rotary welding ring weld seam provides rotary power.
Fig. 4 and Figure 5 shows that outer welding rack schematic diagram.Sliding skateboard 4-2 is driven by slide plate elevating mechanism 4-4 on frames 4-1, along slideway, slides up and down, and it is upper that outer soldering tip 4-5 is fixed on cross sliding board 4-3, and cross sliding board 4-3 can move along the slide plate length direction on sliding skateboard 4-2.Outer soldering tip 4-5 relies on the preliminary adjustment that moves left and right to carry out position with cross sliding board 4-3 integral body that moves up and down of sliding skateboard, relies on the cross slide track on cross sliding board 4-3 to carry out the fine setting of position.
In addition, the utility model inside weld welder adopts cantilever structure, and welding gun, wire feeder, the outlet of interior weldering solder flux are integrated in cantilever design one end.The cantilever 7-2 other end is counterweight 7-5, with counterpoise.Whole cantilever is supported by travelling car, dolly can before and after short-distance movement so that weldering welding position in adjusting.It is upper that the external welding device 4 of outside weld is connected to frames 4-1, and by cross sliding board, 4-3 fixes, capable of regulating outside weld welding position.Inside and outside welder includes weld tracker, but the change in location of automatic tracking welding seam also adjusts automatically.
In the utility model, butt weld is 360 ° of girth joints, the docking pipeline section is fixed by the upper rotating roller 3-6 on portal frame and lower rotating roller 3-4, one side movable portal frame 3 is adjusted docking location, lower cross rotating roller group 6 supports and conveying steel pipe, move with the cantilever luffing angle and regulate interior bond pad locations by interior weldering dolly 7, by cross sliding board 4-3, adjust outer solder joint position.By upper rotating roller 3-6, press down, coordinate the steel pipe axial direction is fixed with lower rotating roller 3-4, by upper rotating roller 3-6, drive steel pipe to do and rotate in a circumferential direction, promote movable portal frame 3 by oil cylinder 3-7 and make steel pipe can carry out a small amount of horizontal radial motion, to regulate pipeline section docking port position.In driving by oil cylinder 3-7, weldering dolly 7 moves on its base, thereby drags cantilever 7-2 and interior soldering tip 7-1 motion, and in the adjustment of steel pipe axial direction, welding position is put; By bracing frame 7-6 and adjusting jack, 7-7 controls the luffing angle of cantilever 7-2, thereby in adjusting, the weldering welding gun is apart from the height of weld seam.Press down by the upper rotating roller in portal frame framework 3-1, coordinate with lower rotating roller, steel pipe is fixed.Upper rotating roller angle can be regulated, thereby drives steel pipe to do different motion: when upper rotatable roll shaft line angle degree and steel shaft line parallel, upper rotating roller rotation, can drive steel pipe to move along the steel pipe axis direction, and this is steel pipe turnover action; When upper rotatable roll shaft line angle degree is vertical with the steel pipe axis, upper rotating roller rotation, can drive steel pipe to do circumferencial direction and rotate, axial rotation action when this welds for butt girth welding seam.Carry out steel shaft to carrying and the steel pipe support work rotated in a circumferential direction by lower cross rotating roller.Lower rotating roller has 3 rotations perpendicular to each other, when steel pipe moves vertically, the only spherical rollers rotation of lower rotating roller, the roller frame does not rotate, in the case the solder joint track be along steel shaft to straight line, this moves for steel pipe passes in and out; Steel pipe is done while rotating in a circumferential direction, the rotation of roller frame, and spherical rollers is not rotated, and the track of solder joint is the annulus along the steel pipe circumferencial direction in the case, axial rotation action when this welds for butt girth welding seam.Adjust the pipe end docking location by movable portal frame.Movable portal frame, can be whole in the laterally enterprising line slip of sliding bottom by oil cylinder pushing.When upper rotating roller presses down, with lower rotating roller, coordinate, after pipe end is fixed, can, by adjusting the position of movable portal frame on horizontal sliding bottom, adjust the relative position of two pipe ends of docking.If relative position is not horizontal direction, can pass through the rotating roller rotating steel tube, by the poor horizontal direction that is controlled at of relative position.
The beneficial effects of the utility model are, can will not meet steel pipe that full-length requires and process the docking steel pipe of compound standard-required, can reduce to a great extent the production cost of applying unit.The utility model provides a kind of steel pipe butt-jointing device, can improve the product lumber recovery, low material consumption and production cost fall, take full advantage of the steel pipe pipeline section that length does not reach standard-required, this device is by inside and outside submerged arc welding mode, carry out the girth joint welding job along two sections pipe ends that need docking, and girth joint meets standard-required.

Claims (4)

1. a steel pipe docks and uses the girth joint submerged arc welding device, it is characterized in that comprising outer welder (4), interior weldering dolly (7), lower cross rotating roller group (6), fixedly portal frame (5) and movable portal frame (3), described fixedly portal frame (5) and movable portal frame (3) are arranged at respectively the both sides of outer welder (4), the left side of described movable portal frame (3) is provided with input steel pipe device (1) and traversing steel pipe device (2), fixedly the right side of portal frame (5) is provided with interior weldering dolly (7), at interior weldering dolly (7) and fixedly between portal frame (5), be provided with lower cross rotating roller group (6).
2. a kind of steel pipe according to claim 1 docks and uses the girth joint submerged arc welding device, it is characterized in that described interior weldering dolly (7) comprises cantilever (7-2), supporting trolley and travel mechanism (7-4), base (7-3) and interior soldering tip (7-1), one end of described cantilever (7-2) is connected with supporting trolley and travel mechanism (7-4), the other end of cantilever (7-2) is connected with interior soldering tip (7-1), it is upper that supporting trolley and travel mechanism (7-4) are placed in base (7-3), also is provided with counterweight (7-5) in supporting trolley and travel mechanism (7-4).
3. a kind of steel pipe according to claim 1 docks and uses the girth joint submerged arc welding device, it is characterized in that described movable portal frame (3) comprises portal frame framework (3-1) and is arranged at the horizontal sliding bottom (3-5) of portal frame framework (3-1) bottom, described horizontal sliding bottom (3-5) is provided with a pair of lower rotating roller (3-4), the side of lower rotating roller (3-4) is provided with earthing brush (3-3), the middle part of portal frame framework (3-1) is provided with the upper rotating roller elevating mechanism (3-2) that drives a pair of upper rotating roller (3-6) to move up and down, the side of described upper rotating roller (3-6) is provided with angle-adjusting mechanism (3-8), described horizontal sliding bottom (3-5) is connected with the oil cylinder (3-7) of being located at portal frame framework (3-1) side.
4. a kind of steel pipe according to claim 1 docks and uses the girth joint submerged arc welding device, it is characterized in that described outer welder (4) comprises outer soldering tip (4-5), frames (4-1), sliding skateboard (4-2), cross sliding board (4-3), slide plate elevating mechanism (4-4), one side of described frames (4-1) is provided with slide plate elevating mechanism (4-4), described slide plate elevating mechanism (4-4) is provided with sliding skateboard (4-2) and cross sliding board (4-3), and outer soldering tip (4-5) is fixedly connected with cross sliding board (4-3).
CN 201220697814 2012-12-17 2012-12-17 Circumferential weld submerged-arc welding device for butt-joint of steel pipes Expired - Fee Related CN202951961U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220697814 CN202951961U (en) 2012-12-17 2012-12-17 Circumferential weld submerged-arc welding device for butt-joint of steel pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220697814 CN202951961U (en) 2012-12-17 2012-12-17 Circumferential weld submerged-arc welding device for butt-joint of steel pipes

Publications (1)

Publication Number Publication Date
CN202951961U true CN202951961U (en) 2013-05-29

Family

ID=48457556

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220697814 Expired - Fee Related CN202951961U (en) 2012-12-17 2012-12-17 Circumferential weld submerged-arc welding device for butt-joint of steel pipes

Country Status (1)

Country Link
CN (1) CN202951961U (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148830A (en) * 2014-07-28 2014-11-19 江苏龙源金属科技有限公司 Three-roller extrusion device for welded pipe welding
CN104325231A (en) * 2014-10-22 2015-02-04 浙江杭萧钢构股份有限公司 Automatic assembly welding device for steel pipe bundle combined structural member
CN104353937A (en) * 2014-10-22 2015-02-18 浙江杭萧钢构股份有限公司 Automatic assembling and welding device for straight steel pipe bundles
CN105081666A (en) * 2014-05-05 2015-11-25 天津港航安装工程有限公司 Pairing welding method for large-diameter steel pipes and pairing welding apparatus for same
CN106363339A (en) * 2016-11-09 2017-02-01 国网山东省电力公司济南市长清区供电公司 Fixed-distance moving rotation-type welding system for electric power tower tubes
CN106392444A (en) * 2016-11-09 2017-02-15 国网山东省电力公司济南市长清区供电公司 Fixed-distance conveying, rotating and clamping device for electric tower pipe
CN109366086A (en) * 2018-09-27 2019-02-22 张华建 A kind of at the uniform velocity slewing for lifting pipe laying vessel pipe fitting welding
CN111843160A (en) * 2020-07-20 2020-10-30 湖南三泰新材料股份有限公司 Sleeving device and machining method for composite steel billet
CN116810235A (en) * 2023-08-19 2023-09-29 天津源泰德润钢管制造集团有限公司 Non-notch steel pipe welding equipment and welding process

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105081666A (en) * 2014-05-05 2015-11-25 天津港航安装工程有限公司 Pairing welding method for large-diameter steel pipes and pairing welding apparatus for same
CN104148830A (en) * 2014-07-28 2014-11-19 江苏龙源金属科技有限公司 Three-roller extrusion device for welded pipe welding
CN104325231A (en) * 2014-10-22 2015-02-04 浙江杭萧钢构股份有限公司 Automatic assembly welding device for steel pipe bundle combined structural member
CN104353937A (en) * 2014-10-22 2015-02-18 浙江杭萧钢构股份有限公司 Automatic assembling and welding device for straight steel pipe bundles
CN104325231B (en) * 2014-10-22 2016-04-20 浙江杭萧钢构股份有限公司 Steel pipe bundle combining structure component automatic assembling welder
CN104353937B (en) * 2014-10-22 2016-12-07 杭萧钢构股份有限公司 Yi word pattern steel pipe bundle automatic assembling welder
CN106363339A (en) * 2016-11-09 2017-02-01 国网山东省电力公司济南市长清区供电公司 Fixed-distance moving rotation-type welding system for electric power tower tubes
CN106392444A (en) * 2016-11-09 2017-02-15 国网山东省电力公司济南市长清区供电公司 Fixed-distance conveying, rotating and clamping device for electric tower pipe
CN106392444B (en) * 2016-11-09 2018-01-26 国网山东省电力公司济南市长清区供电公司 A kind of electric power tower tube spacing delivers rotating and clamping device
CN106363339B (en) * 2016-11-09 2018-01-26 国网山东省电力公司济南市长清区供电公司 A kind of fixed-distance moving rotary electric tower tube welding system
CN109366086A (en) * 2018-09-27 2019-02-22 张华建 A kind of at the uniform velocity slewing for lifting pipe laying vessel pipe fitting welding
CN109366086B (en) * 2018-09-27 2023-10-17 天津塞班海洋工程技术有限公司 Uniform rotation equipment for welding pipe fittings of hoisting pipe-laying ship
CN111843160A (en) * 2020-07-20 2020-10-30 湖南三泰新材料股份有限公司 Sleeving device and machining method for composite steel billet
CN111843160B (en) * 2020-07-20 2023-06-16 湖南三泰新材料股份有限公司 Composite billet sleeving device and processing method
CN116810235A (en) * 2023-08-19 2023-09-29 天津源泰德润钢管制造集团有限公司 Non-notch steel pipe welding equipment and welding process

Similar Documents

Publication Publication Date Title
CN202951961U (en) Circumferential weld submerged-arc welding device for butt-joint of steel pipes
CN204473837U (en) Packing barrel upset pay-off and packing barrel production system
CN203316884U (en) Multifunctional welding test machine
CN206779658U (en) Stereoscopic vision laser aiming robot welding system
CN206536109U (en) Pipe circular seam automatic welding machine
CN209664704U (en) A kind of robot welding pipe flange fixing tool
CN102009254A (en) Automatic straight pipe flange welding machine
CN203209831U (en) 90-degree equal-diameter elbow inner-wall built-up welding device
CN104493370A (en) Automatic welding process for small-diameter pipe
CN202539770U (en) Novel tracking device for linear welding bead
CN201376160Y (en) Automatic tracking device for air-pressure floating contact-type welding
CN103143814A (en) Equipment special for girth welding of steel pipe and welding neck flange
CN102500870A (en) Weld neck flange automatic welding method for steel tube tower and equipment
CN110039248B (en) A shaping welding equipment for I-steel production
CN106270934B (en) A kind of tracking device for welding of pipeline overlaying system
CN205325025U (en) Pipe flange welding special plane
CN204621313U (en) A kind of tracking device for welding of pipeline overlaying system
CN203282022U (en) Weld bead mechanical tracking device
CN106181142A (en) Steel-pipe welding device
CN202894634U (en) Welding carriage
CN110883451B (en) Four-gun intelligent welding equipment for straight pipe flange
CN103600157A (en) Automatic welding walking device in small-diameter pipeline
CN202180284U (en) External tracking device for fine and internal welding tracking points of spiral steel pipes
CN104588835A (en) Automatically welding machining system of pipe fitting of small diameter
CN201693275U (en) Automatic straight-tube flange welder

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20201103

Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No.

Patentee after: CHINA NATIONAL PETROLEUM Corp.

Patentee after: CNPC BOHAI EQUIPMENT MANUFACTURING Co.,Ltd.

Patentee after: NORTH CHINA PETROLEUM STEEL PIPE Co.,Ltd.

Address before: 062658 No. 102 East Ring Road, Cangzhou, Hebei, Qingxian County

Patentee before: NORTH CHINA PETROLEUM STEEL PIPE Co.,Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130529

Termination date: 20211217