CN111906164A - Forming method of bent pipe - Google Patents
Forming method of bent pipe Download PDFInfo
- Publication number
- CN111906164A CN111906164A CN202010532262.8A CN202010532262A CN111906164A CN 111906164 A CN111906164 A CN 111906164A CN 202010532262 A CN202010532262 A CN 202010532262A CN 111906164 A CN111906164 A CN 111906164A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- welding
- gas protection
- elbow
- protection box
- 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.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/08—Making tubes with welded or soldered 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
-
- 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
- B23K10/00—Welding or cutting by means of a plasma
- B23K10/02—Plasma welding
- B23K10/022—Spot welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention relates to a method for forming a bent pipe, which comprises the steps of oppositely welding two semicircular arc-shaped pieces to form the bent pipe, wherein the welding comprises the steps of pre-welding the two semicircular arc-shaped pieces together in a spot welding mode, forming two discontinuously combined welding seams between the two semicircular arc-shaped pieces, and then welding the two welding seams into a continuous welding seam in a continuous welding mode; during continuous welding, the welding point moves along the welding seam from the outer side of the elbow, the inner side of the elbow is provided with a gas protection box, and the gas protection box is attached to the inner wall of the elbow and moves along the welding seam along with the welding point on the outer side, so that gas protection is formed in the welding process of the welding point. The invention realizes the gas shielded continuous welding of the welding seam during the butt welding of the bent pipe, improves the operation efficiency and ensures the welding quality of the spliced large-caliber bent pipe.
Description
Technical Field
The invention relates to a forming method of a metal bent pipe.
Background
Resources such as petroleum, natural gas and the like are transported through metal pipelines, and independent laying of the transport pipelines is not needed no matter the resources are transported on the road or on the seabed. The petroleum and natural gas transmission pipeline mainly comprises a straight pipe and bent pipes with various angles, and the bent pipes are used for changing the transmission direction and are important components of the pipeline. Compared with a straight pipe, the forming difficulty of the bent pipe with the angle is higher, and technical support is more needed.
Publication No. CN110369574A discloses a hydraulic elbow forming device, this hydraulic elbow forming die is provided with the constant head tank on last mould and lower mould, arranges the straight tube in the constant head tank, drives the mould through the hydraulic press and pushes down, suppresses the straight tube, and after last mould and lower mould laminating, the straight tube bending is put in place, is pressed into the return bend, and through the cooperation of last mould, constant head tank and lower mould, no sliding friction vestige on the pipe fitting surface, size precision is high. In this technique, a straight pipe is bent into a bent pipe by using a forming die, and the formability is good, but the surface of the bent pipe is easily scratched by the forming die, and the surface quality is affected.
The publication No. CN110369573A discloses a large-caliber steel pipe bending forming device, which comprises a first chuck, a second chuck and a supporting seat, wherein the first chuck and the second chuck are respectively driven to rotate by a first rocker arm and a second rocker arm, the first rocker arm drives the first chuck to bend the steel pipe for a first time in an arc shape, and the second rocker arm drives the second chuck to bend the steel pipe for a second time in an arc shape; the invention also discloses a large-diameter steel pipe elbow forming process which sequentially comprises the steps of verifying before elbow, calculating elbow size, installing steel pipe, primary bending, secondary bending and correcting after bending. The technology is mainly used for bending and forming pipe fittings with smaller pipe diameters, and is not suitable for oil and gas conveying large-caliber conveying pipelines.
It is still necessary to develop a corresponding forming method for bent pipes used in oil and natural gas transmission pipelines.
Disclosure of Invention
The invention aims to provide a method for forming a bent pipe, and particularly relates to forming and processing of a large-caliber bent pipe.
The technical scheme adopted by the invention for solving the problems is as follows: a method for forming a bent pipe includes such steps as welding two semi-circular arc parts together to form a bent pipe, fixing the two semi-circular arc parts together by spot welding to form two non-continuously combined welded seams, and welding the two welded seams to form a continuous welded seam. During continuous welding, the welding point moves along the welding seam from the outer side of the elbow, the inner side of the elbow is provided with a gas protection box, and the gas protection box is attached to the inner wall of the elbow and moves along the welding seam along with the welding point on the outer side, so that gas protection is formed in the welding process of the welding point.
Specifically, one side of the gas protection box is open, the welding line is pressed on the open side, and the gas protection box is provided with a gas receiving pipe used for being connected with an external gas source.
Preferably, the gas protection box has a skirt around the opening, the skirt forming a contact seal against the inner wall of the elbow, and therefore the skirt may also be referred to as a sealing skirt to prevent the shielding gas from leaking significantly.
Preferably, during continuous welding, the bent pipe is lifted up in the air, an arc-shaped rail penetrating through the middle of the bent pipe is arranged, a sliding trolley is arranged on the arc-shaped rail, the gas protection box is arranged on the sliding trolley, the gas protection box is always ejected outwards and clings to the inner wall of the bent pipe, and the sliding trolley is driven to move along the arc-shaped rail and further pull the gas protection box to cling to the inner wall of the bent pipe.
Preferably, the bent pipe is fixed on a vertical installation back plate, two ends of the arc-shaped rail are respectively and correspondingly exposed out of two pipe openings of the bent pipe, and two ends of the exposed arc-shaped rail are also fixedly supported on the installation back plate.
Specifically, the sliding trolley is provided with an elastic extension mechanism, the gas protection box is arranged at the far end of the elastic extension mechanism, and the elastic extension mechanism has the tendency of extending outwards, so that the far-end gas protection box is pushed to the inner wall of the circular tube.
As an implementation manner, the elastic extension mechanism comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is provided with two connecting rods which are arranged in parallel and connected through a connecting cross rod, the second connecting rod is provided with two connecting rods which are arranged in parallel and connected through a connecting cross rod, the third connecting rod is provided with two connecting rods which are arranged in parallel and connected through a connecting cross rod, the near ends of the first connecting rod and the second connecting rod are respectively and directly hinged with the sliding trolley, the far ends of the first connecting rod and the second connecting rod are respectively and mutually staggered and hinged with the near end of the third connecting rod, and the gas protection box can be pushed to be hinged at the far end of the third connecting rod when the first connecting rod or the second connecting rod is stressed at the hinged part.
Preferably, the third connecting rod is of a crank structure, the far end is a long handle, the near end is a short handle, and the far ends of the first connecting rod and the second connecting rod are respectively hinged with two ends of the short handle.
Preferably, the elastic extension mechanism comprises a tension spring, a proximal end of the tension spring is fixed, and a distal end of the tension spring is connected with the first link or the second link. As an implementation manner, the first link is provided with a first rotating rod at the hinge joint of the distal end thereof, the second link is provided with a second rotating rod 411 at the hinge joint of the distal end thereof, the distal end of the tension spring is directly connected to the first rotating rod or the second rotating rod, the first link and the second link are linked and twisted under the pulling of the tension spring, the high-low position relation of the hinge joint of the distal ends of the first link and the second link is changed, that is, the short handle is twisted, so that the long handle connected with the short handle is bent and extended, and the gas protection box is pushed to be sprung outwards.
In order to facilitate the folding of the elastic extension mechanism, a pair of clamping piles is arranged on the top surface of the sliding trolley, the two clamping piles are respectively arranged on the outer sides of the first connecting rod, the second connecting rod and the third connecting rod in the projection of the top surface of the sliding trolley, a protruding clamping edge is arranged on the inner side surface of each clamping pile, and the clamping edge clamps the connecting rod which is positioned on the outermost side among the first connecting rod, the second connecting rod and the third connecting rod when the first connecting rod, the second connecting rod and the third connecting rod are folded and folded on the top surface of the sliding trolley.
Compared with the prior art, the invention has the advantages that: aiming at the forming of the large-caliber bent pipe, the invention is formed by welding two half arc-shaped parts, the welding comprises spot welding fixing and continuous welding fishing, and the welding quality of a welding line is ensured by adopting gas shielded welding. The invention also provides a method for realizing the continuous welding of the gas shield, so as to ensure the welding operation of the bent pipe.
Drawings
FIG. 1 is a schematic structural view of the continuous welding of the elbow pipe according to the present invention;
FIG. 2 is a schematic structural view of a mounting backplate;
FIG. 3 is a schematic structural view of an arc-shaped track, a sliding trolley and a chain;
FIG. 4 is a schematic structural view of an arc-shaped track;
FIG. 5 is a schematic view of the structure of the sliding cart and the gas shield box;
FIG. 6 is an enlarged view of a portion of FIG. 5 at A;
in the drawings, the components represented by the respective reference numerals are listed below:
1-mounting back plate, 2-elbow, 3-arc rail, 4-sliding trolley, 5-gas protection box, 6-chain, 101-clamp, 102-arc mounting groove, 103-strip notch, 104-mounting plate, 301-arc rod, 302-cross rod, 303-fixing column, 304-flange plate, 305-motor, 306-connecting column, 307-first chain wheel, 308-second chain wheel, 309-chain guide sleeve, 401-sliding plate, 402-gas protection box bottom plate, 403-vertical plate, 404-arc groove, 405-fixing plate, 406-first connecting rod, 407-second connecting rod, 408-third connecting rod, 409-short handle, 410-connecting cross rod, 411-second rotating rod, 412-tension spring, 413-clamp pile, 414-clamp edge, 501-air receiving pipe and 502-sealing skirt.
Detailed Description
The present invention will be described in further detail below with reference to the embodiments of the drawings, which are illustrative and intended to be illustrative of the present invention and are not to be construed as limiting the present invention.
The bent pipe of the embodiment is formed by oppositely welding two semicircular arc-shaped parts into the bent pipe, the two semicircular arc-shaped parts are welded and fixed together in advance in a spot welding mode, two discontinuously combined welding seams are formed between the two semicircular arc-shaped parts, and then the two welding seams are welded into a continuous welding seam in a gas-shielded continuous welding mode. During continuous welding, the welding point moves along the welding line from the outer side of the elbow, the inner side of the elbow is provided with a gas protection box, and the gas protection box is attached to the inner wall of the elbow and moves along the welding line synchronously along with the welding point on the outer side, so that gas protection is formed in the welding of the welding point. The welding principle of the two welding seams is consistent, and only the extending directions of the corresponding gas protection boxes are opposite.
As shown in fig. 1-6, in order to realize gas-shielded continuous welding of a welding seam of an elbow, a device for realizing gas shielding of the welding seam in the re-welding process is designed, which comprises an installation back plate 1, an arc-shaped track 3, a sliding trolley 4 and a gas-shielded box 5, wherein the front side surface of the installation back plate 1 is fixed with an elbow 2 through a group of clamps 101; the lower part of the mounting backboard 1 is provided with a group of arc mounting grooves 102; the arc-shaped track 3 comprises a group of arc-shaped rods 301, a plurality of cross rods 302 are fixed between the group of arc-shaped rods 301, fixing columns 303 are fixed at two ends of the group of arc-shaped rods 301, and one ends of the fixing columns 303 are fixed on the front side surface of the mounting backboard 1 through flanges 304, screws and the arc-shaped mounting grooves 102; a motor 305 is fixed at one end of the arc-shaped track 3 through a mounting seat, a connecting column 306 is fixed at the other end of the arc-shaped track 3 and is positioned between the cross rod 302 and the fixing column 303, a first chain wheel 307 is rotatably connected to the peripheral side surface of the connecting column 306, and a second chain wheel 308 is fixed at the output end of the motor 305; the sliding trolley 4 comprises a sliding plate 401, vertical plates 403 are fixed on the opposite sides of the bottom surface of the sliding plate 401, arc-shaped grooves 404 are formed in the inner sides of the vertical plates 403, the sliding plate 401 is in sliding fit with the arc-shaped rails 3 through the vertical plates 403 and the arc-shaped grooves 404, and a fixing plate 405 is fixed in the middle of the bottom surface of the sliding plate 401; a chain 6 is engaged on the first chain wheel 307 and the second chain wheel 308, and two ends of the chain 6 are respectively fixedly connected with two ends of the fixing plate 405; one side of the top surface of the sliding plate 401 is rotatably connected with a group of first connecting rods 406 through a hinged support, and the other side of the top surface of the sliding plate 401 is rotatably connected with a group of second connecting rods 407 through a hinged support; the side of the gas protection box 5 is fixed with a gas protection box bottom plate 402, one side of the gas protection box 5 is fixed with a gas receiving pipe 501, the two sides of the gas protection box bottom plate 402 are all rotatably connected with a third connecting rod 408, one end of the third connecting rod 408 is fixed with a short handle 409, one end of the hinged support far away from the two first connecting rods 406 is rotatably connected with the upper parts of the two short handles 409 through a first rotating rod, one end of the hinged support far away from the two second connecting rods 407 is rotatably connected with the lower parts of the two short handles 409 through a second rotating rod 411, and tension springs 412 are fixed between one end of the two first connecting rods 406 close to the hinged support and the second rotating rod.
As shown in fig. 1, the arc-shaped track 3 is located in the elbow pipe 2 and is concentrically arranged with the elbow pipe 2, and the top surface of the gas protection box 5 is in contact with the inner wall of the elbow pipe 2.
As shown in fig. 5-6, the opposite sides of the top surface of the sliding plate 401 are fixed with the clipping piles 413, the inner sides of the clipping piles 413 are fixed with the clipping edges 414, the top surface of the clipping edges 414 is an arc surface structure, and the bottom surface of the clipping edges 414 is a flat surface structure, when the first link 406, the second link 407 and the third link 408 are folded on the sliding plate 401, the positions of the first link 406, the second link 407, the third link 408 and the gas protection box 5 can be limited by clipping the clipping edges 414 on the top surface of the third link 408.
As shown in fig. 4, chain guide sleeves 309 are fixed on bottom surfaces of the crossbars 302, the chains 6 are located in the chain guide sleeves 309 on the crossbars 302 and are in clearance fit with the chain guide sleeves 309, and the movement tracks of the chains 6 can be limited by arranging the chain guide sleeves 309.
As shown in fig. 3-4, the first sprocket 307 and the second sprocket 308 are opposite to the chain guide sleeve 309, and the chain guide sleeve 309 is located at the middle of the cross bar 302.
As shown in fig. 1-2, a set of strip-shaped notches 103 is fixed on one surface of the mounting backboard 1, a mounting board 104 is fixed on the front side of the strip-shaped notch 103 and at a position opposite to the strip-shaped notch 103 through a set of fixing screws, and the mounting backboard 1 is fixed at the mounting position through the screws, the mounting board 104 and the strip-shaped notches 103.
As shown in fig. 5, the top surface of the gas protection box 5 is an arc surface structure, the top surfaces of the four side walls of the gas protection box 5 are provided with sealing skirts 502, and the sealing skirts 502 are easy to deform, so that the gas protection box 5 can be ensured to contact the inner wall of the elbow pipe 2 all the time. As shown in fig. 5-6, a connecting cross bar 410 is fixed among the group of first links 406, the group of second links 407, and the group of third links 408.
Wherein, can be in the fixed two support columns that transversely extend out of lower part of installation backplate 1 front side, can be used to support return bend 2, guarantee return bend 2's stability with anchor clamps 101 cooperation.
The welding step of the bent pipe:
1. firstly, two semicircular arc-shaped pieces forming the bent pipe 2 are welded together in a butt welding mode, and the side seams are all in a spot welding mode.
2. The pre-welded bent pipe 2 is fixed to the mounting backplate 1 by the clamp 101, and the welding seam is ensured to be upward.
3. As shown in fig. 1, the arc-shaped rail 3 is passed through the elbow 2 and fixed to the mounting plate 1 by the flange 304 and screws.
4. The second chain wheel 308 can be driven to rotate by the motor 305, so that the sliding trolley 4 and the gas protection box 5 can be driven to slide along the arc-shaped track 3 through the transmission of the chain 6 and the first chain wheel 307.
5. At this moment, the top surface opening of the gas protection box 5 always props against and clings to the inner wall of the elbow pipe 2 through the elastic force of the sliding trolley 4, the sliding plate 401 can drive the gas protection box 5 to slide along the welding line, meanwhile, inert gases such as argon or nitrogen are input into the gas receiving pipe 501 in the sliding process, the gas protection box 5 is not communicated with the protective gases through the gas receiving pipe 501, and therefore, a movable inert gas protection chamber is formed on the inner wall of the elbow pipe 2 equivalently.
6. Adopt plasma welding gun head to weld whole weld along the welding seam from return bend 2 outer walls and to fill, accomplish the final welding of two semicircle arc shape spares, gas protection box 5 cooperation plasma welding gun head operation, plasma welding gun head follow outside along the welding seam welding, gas protection box 5 slides along the welding seam from the inside, provides gas shield for plasma welding, one inside and outside synchronous motion of gas protection box 5 and plasma welding gun head.
Although preferred embodiments of the present invention have been described in detail hereinabove, it should be clearly understood that modifications and variations of the present invention are possible to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for forming a bent pipe is characterized in that: the method comprises the following steps of welding two semicircular arc-shaped pieces into a bent pipe in a butt joint mode, wherein the two semicircular arc-shaped pieces are welded together in advance in a spot welding mode, two discontinuously combined welding seams are formed between the two semicircular arc-shaped pieces, and then the two welding seams are welded into a continuous welding seam in a continuous welding mode;
during continuous welding, the welding point moves along the welding line from the outer side of the elbow, the inner side of the elbow is provided with a gas protection box (5), and the gas protection box is attached to the inner wall of the elbow and moves along the welding line synchronously along with the welding point on the outer side, so that gas protection is formed in the welding of the welding point.
2. The method of molding an elbow pipe according to claim 1, wherein: one side of the gas protection box (5) is open, the opening presses a welding line, and the gas protection box is provided with a gas receiving pipe (501) used for connecting an external gas source.
3. The method of molding an elbow pipe according to claim 2, wherein: and a skirt edge is arranged around the opening of the gas protection box (5), and the skirt edge forms contact sealing to the inner wall of the elbow.
4. The method of molding an elbow pipe according to claim 1, wherein: during continuous welding, the bent pipe is lifted up in the air, an arc-shaped rail (3) penetrating through the middle of the bent pipe is arranged, a sliding trolley (4) is arranged on the arc-shaped rail (3), the gas protection box (5) is arranged on the sliding trolley (4), the gas protection box (4) is always ejected outwards and attached to the inner wall of the bent pipe, and the sliding trolley (4) is driven to move along the arc-shaped rail (3) and further pull the gas protection box (5) to attach to the inner wall of the bent pipe.
5. The method of molding an elbow pipe according to claim 4, wherein: the bent pipe is fixed on the vertical installation back plate (1), two ends of the arc-shaped rail (3) are respectively and correspondingly exposed out of two pipe openings of the bent pipe, and two ends of the exposed arc-shaped rail are also fixedly supported on the installation back plate (1).
6. The method of molding an elbow pipe according to claim 4, wherein: the sliding trolley is provided with an elastic extension mechanism, the gas protection box (5) is arranged at the far end of the elastic extension mechanism, and the elastic extension mechanism has the tendency of extending outwards so as to push the far-end gas protection box (5) to the inner wall of the circular tube.
7. The method of molding an elbow pipe according to claim 6, wherein: the elastic extension mechanism comprises a first connecting rod (406), a second connecting rod (407) and a third connecting rod (408), wherein the first connecting rod (406) is provided with two connecting rods which are arranged in parallel and connected through a connecting cross rod (410), the second connecting rod (407) is provided with two connecting rods which are arranged in parallel and connected through the connecting cross rod (410), the third connecting rod (408) is provided with two connecting rods which are arranged in parallel and connected through the connecting cross rod (410), the near ends of the first connecting rod (406) and the second connecting rod (407) are respectively and directly hinged with the sliding trolley (4), the far ends of the first connecting rod (406) and the second connecting rod (407) are respectively and mutually staggered and hinged with the near end of the third connecting rod (408), the third connecting rod (408) can be pushed when the first connecting rod (406) or the second connecting rod (407) is stressed at the hinged positions of the near ends of the first connecting rod and the second connecting rod, and the.
8. The method of molding an elbow pipe according to claim 7, wherein: the third connecting rod (408) is of a crank structure, the far part is a long handle, the near part is a short handle (409), and the far ends of the first connecting rod (406) and the second connecting rod (407) are respectively hinged with the two ends of the short handle (409).
9. The method of molding an elbow pipe according to claim 7, wherein: the elastic extension mechanism comprises a tension spring, the proximal end of the tension spring is fixed, and the distal end of the tension spring is connected with the first connecting rod (406) or the second connecting rod (407).
10. The method of molding an elbow pipe according to claim 7, wherein: the top surface of the sliding trolley (4) is provided with a pair of clamping piles (413), the two clamping piles (413) are respectively arranged on the outer sides of the first connecting rod (406), the second connecting rod (407) and the third connecting rod (408) in the projection of the top surface of the sliding trolley, a protruding clamping edge (414) is arranged on the inner side surface of each clamping pile, and the clamping edge (414) clamps the connecting rod which is located on the outermost side among the first connecting rod (406), the second connecting rod (407) and the third connecting rod (408) when the first connecting rod (406), the second connecting rod (407) and the third connecting rod (408) are folded and collected on the top surface of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532262.8A CN111906164B (en) | 2020-06-12 | 2020-06-12 | Forming method of bent pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010532262.8A CN111906164B (en) | 2020-06-12 | 2020-06-12 | Forming method of bent pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111906164A true CN111906164A (en) | 2020-11-10 |
| CN111906164B CN111906164B (en) | 2022-09-20 |
Family
ID=73237647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010532262.8A Active CN111906164B (en) | 2020-06-12 | 2020-06-12 | Forming method of bent pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111906164B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365566A (en) * | 1965-08-17 | 1968-01-23 | Benedict A. Kuder | Welding process |
| CN101045274A (en) * | 2007-04-30 | 2007-10-03 | 李文秀 | Equipment for automatically welding longitudinal arched seam of large elbow |
| CN102689122A (en) * | 2012-06-11 | 2012-09-26 | 珠海市新维焊接器材有限公司 | Large-diameter pipeline welding device |
| CN102765431A (en) * | 2011-03-02 | 2012-11-07 | 常州中铁科技有限公司 | Trolley for tunnel detection radar |
| CN103604014A (en) * | 2013-11-14 | 2014-02-26 | 上海沈达空调配件厂（普通合伙） | Reducing pipe fitting and manufacturing method thereof |
| CN108857068A (en) * | 2018-06-27 | 2018-11-23 | 西安飞机工业（集团）有限责任公司 | A kind of method for laser welding for aircraft air inlet leading edge thin-wall member |
| CN210475909U (en) * | 2019-07-04 | 2020-05-08 | 郑州越达科技装备有限公司 | Back gas protection mechanism for boundary beam type welding equipment |
-
2020
- 2020-06-12 CN CN202010532262.8A patent/CN111906164B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3365566A (en) * | 1965-08-17 | 1968-01-23 | Benedict A. Kuder | Welding process |
| CN101045274A (en) * | 2007-04-30 | 2007-10-03 | 李文秀 | Equipment for automatically welding longitudinal arched seam of large elbow |
| CN102765431A (en) * | 2011-03-02 | 2012-11-07 | 常州中铁科技有限公司 | Trolley for tunnel detection radar |
| CN102689122A (en) * | 2012-06-11 | 2012-09-26 | 珠海市新维焊接器材有限公司 | Large-diameter pipeline welding device |
| CN103604014A (en) * | 2013-11-14 | 2014-02-26 | 上海沈达空调配件厂（普通合伙） | Reducing pipe fitting and manufacturing method thereof |
| CN108857068A (en) * | 2018-06-27 | 2018-11-23 | 西安飞机工业（集团）有限责任公司 | A kind of method for laser welding for aircraft air inlet leading edge thin-wall member |
| CN210475909U (en) * | 2019-07-04 | 2020-05-08 | 郑州越达科技装备有限公司 | Back gas protection mechanism for boundary beam type welding equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111906164B (en) | 2022-09-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6425709B1 (en) | Line up of pipes or pipe components | |
| FR2899141B1 (en) | ORBITAL DIT SUPPORT FOR A WELDING WELDING DEVICE FOR END-TO-END WELDING TO FORM A PIPELINE-TYPE PIPELINE. | |
| KR20110033721A (en) | Pipe clamping apparatus | |
| CN107717181A (en) | A kind of eight axles linkage intersection robot welding workstation | |
| CN110732754A (en) | TIG welding device for butt joint of LNG pipelines and welding method thereof | |
| CN204997233U (en) | Assembly welding equipment is restrainted to steel pipe | |
| CN111906164B (en) | Forming method of bent pipe | |
| US4542276A (en) | Device for welding tubes | |
| CN202240322U (en) | Tube material supporting device for welding test | |
| CN207272589U (en) | A kind of efficiently quick automobile exhaust pipe welding equipment | |
| CN207447752U (en) | Large scale pipe end axis welder | |
| AU2019378560B2 (en) | Device for the orbital processing of non-rotating joints and pipe ends | |
| CN205200863U (en) | Steel tube welding device | |
| CN110328437A (en) | A kind of processing unit (plant) and its processing method of combined pipe | |
| CN111889857B (en) | Gas protection device for continuous welding of large-diameter bent pipe | |
| KR101539342B1 (en) | Orbital welding carriage for pipe | |
| KR20130071116A (en) | Repair back purge system for clad pipe line root repair welding | |
| CN115555781B (en) | Welding device for building transformation | |
| CN109048152B (en) | All-position pipeline intelligent welding system | |
| CN104759772A (en) | General assembling and welding apparatus for steel tube bundle | |
| NZ577331A (en) | A welding bug for welding together pipe sections when laying pipelines | |
| CN210967400U (en) | TIG automatic welding device for butting L NG conveying pipelines | |
| KR101555304B1 (en) | Orbital welding device and a slide-type multi-stage apparatus for welding using the welding method | |
| CN210147206U (en) | Portable pipeline welding robot | |
| CN115647532B (en) | Tank welding method for strain-strengthened low-temperature tank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |