CN202212674U - Welder for inside weld of small-bore long pipe - Google Patents
Welder for inside weld of small-bore long pipe Download PDFInfo
- Publication number
- CN202212674U CN202212674U CN2011203069782U CN201120306978U CN202212674U CN 202212674 U CN202212674 U CN 202212674U CN 2011203069782 U CN2011203069782 U CN 2011203069782U CN 201120306978 U CN201120306978 U CN 201120306978U CN 202212674 U CN202212674 U CN 202212674U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model discloses a welder for an inside weld of a small-bore long pipe. The welder comprises a base, a welding torch system, a wire feeding mechanism, a moving trolley system and a welding control system. The welding torch system comprises a motor, a vertical column, a slider, a beam and a welding torch, the beam is a hollow pipe and is fixedly connected onto the slider, the welding torch comprises a hollow front end plate, a hollow rear end plate and at least three hollow connecting pipes fixedly connected with the front end plate and the rear end plate, partition plates are arranged in the front end plate and the rear end plate, a water inlet pipe and a water outlet pipe are fixedly connected onto the front end plate and communicated with different inner cavities of the front end plate, a connecting seat is further arranged on the front end plate and connected with the front end of the beam, a balance arc frame is fixedly arranged among the connecting pipes, and welding electrodes are fixed onto the balance arc frame. The moving trolley system comprises a trolley, a variable frequency motor and at least two positioning and clamping devices, wherein the trolley is mounted on the base through two guide rail pairs and a gear-rack pair, the variable frequency motor is fixedly arranged at the bottom of the trolley, and the positioning and clamping devices are fixedly arranged on the trolley. The welder has the advantages of fine rigidity, small radial size of the welding torch, fine stability and less deformation, and is high in welding quality.
Description
Technical field
The utility model relates to a kind of inside weld welding machine that is used for small-bore long tube, the inside weld welding machine of the small-bore long tube argon arc welding of carrying especially for oil gas.
Background technology
Development along with modern oil-gas mining conveying technology; The oil gas well is more and more darker; The exploitation operating mode is more and more abominable, and feed-line is more and more longer, and line pressure is increasingly high; Former oil gas contains the hydrogen sulfide gas of a large amount of severe corrosives and severe toxicity again, and modern oil-gas mining has been proposed higher specification requirement with the steel pipe manufacturing.It requires pipeline will have excellent corrosion resisting performance and high-grade mechanical performance, also high reliability must be arranged simultaneously.The inner liner stainless steel multiple tube that adopt in now domestic low pressure oil gas fields, promptly at carbon steel pipe inner liner stainless steel pipe to reach high strength and corrosion resistant purpose.But there are the gap in this stainless steel composite pipe basic unit and multiple layer, and stainless steel layer is prone to come off under long-term High Voltage erosion state, causes plugging.
Coating stainless steel multiple tube in the former transportation pipe great majority of this type of pipeline still adopt at present; The production technology of interior coating stainless steel multiple tube has two kinds; A kind of is carbon steel pipe endoporus built-up welding Stainless Steel Production; The import stainless steel composite pipe adopts this type of explained hereafter mostly at present, and its welding difficulty is big, and big energy-consuming is its expensive main cause.Another kind rolls production for stainless steel clad plate; Be with the basic unit of stainless steel composite pipe and multiple layer be mode with explosive welding or metallurgical binding with two kinds of metal composite together; Stainless steel layer and carbon steel layer can not come off; Need to use inside weld of internal welding device weldering after this kind method is shaped, the interior soldering equipment that uses at present comprises base, mounting and clamping system, welding gun system, wire feeder and welding control system; The mounting and clamping system system comprises a fixed head and the moving press plate that drives through screw mandrel-pair of nut, can workpiece be positioned between fixed head and the moving press plate; The slide block that the welding gun system comprises guide rail, be loaded on dolly on the guide rail, be located at column on the dolly, cooperate through guideway with column; Column also links to each other through screw mandrel-pair of nut with slide block, and screw mandrel by motor-driven, is installed with crossbeam through transmission device on the slide block; The end of crossbeam is connected with the welding gun of frame structure; Be provided with the swinging arc frame of crosshead shoe structure in the welding gun, welding electrode is fixed on the swinging arc frame, and the swinging arc frame can be adjusted the position of welding electrode at two-dimensional directional; Said wire feeder comprises the silk dish that is fixedly arranged on the column, is positioned at the fiber tube of welding gun and the transport that can move forward and backward fiber tube, welding wire be around in the silk dish upward and its front end pass fiber tube, before the silk dish, be provided with a wire-feed motor; Welding control system links to each other with welding electrode, swinging arc frame, wire-feed motor through circuit.
During use, workpiece is fixed, adjusts the lengthwise position of crossbeam and welding gun through motor, transmission device, screw mandrel-pair of nut; The swinging arc frame can be finely tuned the position of welding electrode; Aim at weld seam, during welding, through control dolly moving axially along workpiece; And by transport with moved further fiber tube and the continuous wire feed of wire-feed motor, weldering in accomplishing by welding electrode; But that this device is used for is small-bore, be difficult to meet the demands during long tube, the one, because crossbeam and welding gun need to move vertically during welding, can cause the vibration of the two inevitably; Add that workpiece is longer, crossbeam is also necessarily longer, is again cantilever design; The rigidity of itself is relatively poor, and the weight of welding gun is lighter, will cause amplitude to strengthen; The less stable of welding gun has seriously reduced the forming quality of weld seam; Two: because the transport of fiber tube also need be installed in the welding gun, will strengthen its radial dimension, the workpiece bore that is suitable for is restricted; And welding gun does not have cooling device; When being used for small-bore, long tube, assembled the heat energy that a large amount of welding discharge in the pipe, weld interval is longer again; Welding gun is under the condition of high temperature yielding for a long time, and this also will influence welding quality.
Summary of the invention
The purpose of the utility model is the above-mentioned deficiency that exists to prior art; A kind of small-bore long tube inside weld welding machine is provided; The radial dimension that it has good rigidly, welding gun is little, good stability, the little advantage of distortion, can be used for interior weldering small-bore, long tube, and welding quality is high.
For achieving the above object, the small-bore long tube inside weld welding machine of the utility model comprises base, welding gun system, wire feeder, travelling car system and welding control system; The welding gun system comprises motor, column, slide block, crossbeam and welding gun, on column, is provided with screw mandrel and guide rail longitudinally, and screw mandrel links to each other through speed reduction gearing with motor; Be installed with on the slide block and the screw mandrel nut engaged; And on this slide block, be provided with the roller that cooperates with guide rail, it is characterized in that said crossbeam is hollow tube and connects firmly on slide block, the tube connector of at least three hollows that welding gun comprises front end-plate and the end plate of hollow, connect firmly with forward and backward end plate; Be equipped with dividing plate in the forward and backward end plate; On front end-plate, be fixedly connected with water inlet pipe and outlet pipe that different inner chambers with it communicate, also be provided with Connection Block at front end-plate, Connection Block links to each other with the front end of crossbeam; Between tube connector, be installed with the swinging arc frame, welding electrode is fixed on the swinging arc frame; Said travelling car system comprises through two guideways and gear-tooth bar pair and is installed on dolly on the base, is fixedly arranged on the variable-frequency motor of dolly bottom and is fixedly arranged at least two cover locating clamping devices on the dolly; Said tooth bar is fixed on the base; Gear is loaded on the output shaft of variable-frequency motor; Every cover locating clamping device comprises the location-plate that is fixedly arranged on the dolly, two rollers that are installed on the location-plate middle part, and two rollers on the different location-plates are coaxial respectively, are equipped with rotatable screw mandrel at every location-plate two ends; Nut all is housed on the screw mandrel; Each nut and clamping plate separately connect firmly, and nut is provided with slide rail and the chute that cooperates with location-plate, and the end of screw mandrel is equipped with handle; Said wire feeder comprises silk dish, is located at slide block, in the crossbeam, Connection Block, front end-plate and the fiber tube between the tube connector, welding wire is around in that the silk dish is gone up and its front end passes fiber tube, before the silk dish, is provided with a wire-feed motor; Welding control system links to each other with welding electrode, swinging arc frame, wire-feed motor through circuit.
Above-mentioned speed reduction gearing comprises sprocket wheel link chain mechanism and worm-and-wheel gear, and worm gear is loaded on the end of screw mandrel, and two sprocket wheels of sprocket wheel link chain mechanism are loaded on respectively in the rotating shaft of worm screw and motor.
The utility model is fixed in workpiece on the dolly through positioning clamping device, and during welding, variable-frequency motor makes dolly move axially along the guide rail on the base through gear-tooth bar pair; And the welding gun maintenance is static, can significantly reduce the vibration of welding gun, improves its stability; Because the quality of workpiece is bigger, the vibration when dolly moves is very little to the influence of workpiece, and workpiece moves steadily; It is constant that distance between workpiece and the welding electrode keeps basically, can guarantee the forming quality of long tube welded seam; The crossbeam of hollow gets final product weight reduction, can improve rigidity again, and is convenient to the setting of connection line and fiber tube, reduces radial dimension; Because it is static that welding gun keeps, fiber tube need not to move, and can cancel original transport, has reduced the radial dimension of welding gun, applicable to small-bore workpiece; But the both weight reductions of the tube connector of hollow improve rigidity, inject cooling water through water inlet pipe and outlet pipe Butt welding gun; But Butt welding gun is lowered the temperature again; Even use in the small-bore workpiece that temperature is very high in pipe for a long time, welding gun is not yielding yet, thereby guarantees welding quality.
As the further improvement of the utility model, the lower end of said Connection Block is connected with two spherical directive wheels; Lengthwise position through the adjustment slide block can make spherical directive wheel contact with the inwall of workpiece, and Butt welding gun provides support, and can improve the rigidity of welding gun, further improves welding quality;
As the further improvement of the utility model, said tube connector is the elliptical tube of hollow, and long axis of ellipse is positioned at vertically; This structure can improve the rigidity of tube connector and welding gun;
As the further improvement of the utility model, said wire feeder also comprises the front end wire-feed motor of being located in the Connection Block, and this wire-feed motor links to each other with welding control system through circuit; Through the secondary wire feed,, can improve long tube the continuity and the stationarity of wire feed when welding;
As the further improvement of the utility model, on base, be provided with one or more gate beam runing rest; When not working, rotate the gate beam runing rest, make the bottom of its supporting traverse, crossbeam produces distortion in the time of can avoiding idle for a long time, improves the rigidity of crossbeam;
As the further improvement of the utility model, on tube connector, also be installed with camera, a display links to each other with camera; Duty in the time of can observing welding so that adjust corresponding parts at any time, is guaranteed welding quality.
In sum, the radial dimension that the utlity model has good rigidly, welding gun is little, good stability, the little advantage of distortion, can be used for interior weldering small-bore, long tube, and welding quality is high.
Description of drawings
Fig. 1 is the stereogram of the utility model embodiment.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the front view of every cover locating clamping device.
Fig. 4 is the vertical view of Fig. 3.
Fig. 5 is the A-A cutaway view of Fig. 4.
Fig. 6 is the front view of welding gun.
Fig. 7 is the vertical view of Fig. 6.
Fig. 8 is the B-B cutaway view of Fig. 6.
Fig. 9 is the front view of front end-plate.
Figure 10 is the front view of end plate.
Figure 11 is the front view of wire feeder.
Figure 12 is the working state figure of Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further detailed explanation.
Like Fig. 1, shown in Figure 2, this small-bore long tube inside weld welding machine comprises base 1, welding gun system, wire feeder, travelling car system and welding control system 50; The welding gun system comprises motor 2, column 3, slide block 4, crossbeam 5 and welding gun 10, on column 3, is provided with screw mandrel (not shown) and four guide rails 6 longitudinally, and screw mandrel and motor 2 link to each other through speed reduction gearing; Speed reduction gearing comprises sprocket wheel link chain mechanism 7 and worm-and-wheel gear 8, and worm gear is loaded on the end of screw mandrel, and two sprocket wheels of sprocket wheel link chain mechanism 7 are loaded on respectively in the rotating shaft of worm screw and motor 2; Be installed with on the slide block 4 and screw mandrel nut engaged (not shown), and on this slide block 4, be provided with eight rollers 9 that cooperate with four guide rails 6, said crossbeam 5 connects firmly on slide block 4 for hollow tube and through flange; Like Fig. 6, Fig. 7, Fig. 8, Fig. 9 and shown in Figure 10; The tube connector 13 of the front end-plate 11 that welding gun 10 comprises hollow and end plate 12, four hollows connecting firmly through welding with forward and backward end plate 11,12, tube connector 13 is the elliptical tube of hollow, and long axis of ellipse is positioned at vertically; Be provided with three dividing plates 14 in the front end-plate 11; Be provided with dividing plate 15 in the end plate 12, on front end-plate 11, be fixedly connected with water inlet pipe 16 and outlet pipe 17 that different inner chambers with it communicate, also be provided with the Connection Block 18 that welding connects firmly at front end-plate 11; Connection Block 18 links to each other with the front end of crossbeam 5; The lower end of Connection Block 18 is connected with two spherical directive wheels 19, between tube connector 13, is installed with swinging arc frame 20, and welding electrode 21 is fixed on the swinging arc frame 20; Also being installed with camera 22, one display (not shown) therein on the tube connector 13 links to each other with camera 22;
Like Fig. 1, Fig. 2, Fig. 3, Fig. 4 and shown in Figure 5; Said travelling car system comprises through two guideways 31 and gear-tooth bar secondary 32 and is installed on dolly 33 on the base 1, is fixedly arranged on the variable-frequency motor (not shown) of dolly 33 bottoms and is fixedly arranged on three cover locating clamping devices 34 on the dolly 33; Said tooth bar is fixed on the base 1; Gear is loaded on the output shaft of variable-frequency motor, and two rollers 36 on 36, three location-plates 35 of two rollers that every cover locating clamping device 34 comprises the location-plate 35 that is fixedly arranged on the dolly 33, be installed on location-plate 35 middle parts are coaxial respectively; Be equipped with rotatable screw mandrel 37 at every location-plate 35 two ends; Nut 38 all is housed on the screw mandrel 37, and each nut 38 and clamping plate 39 separately connect firmly, and nut 38 is provided with slide rail and the chute that cooperates with location-plate 35; The end of screw mandrel 37 is equipped with handle 40, on base 1, is provided with two gate beam runing rests 30; Shown in figure 11; Said wire feeder comprises silk dish 41, is located at slide block 4, the fiber tube 42 in the crossbeam 5, Connection Block 18 and be located at the fiber tube 43 between front end-plate 11, the tube connector 13; Welding wire 44 is around on the silk dish 41 and its front end passes fiber tube 42,43; Before silk dish 41, be provided with wire-feed motor 45, in Connection Block 18, be provided with front end wire-feed motor 46; Welding control system 50 links to each other with welding electrode 21, swinging arc frame 20, two wire-feed motor 45,46 through circuit, and connection line is positioned at crossbeam 5 and welding gun 10.
When idle at ordinary times, like Fig. 1, shown in Figure 2, the bottom of two gate beam runing rest 30 supporting traverses 5 can avoid crossbeam 5 to produce distortion, improves the rigidity of crossbeam 5; During use, shown in figure 12, two gate beam runing rest 30 rotations 90; Workpiece 51 is positioned on two rollers 36 of three cover locating clamping devices 34, can realizes self-centering, again the handle 40 of turning of work piece 51 both sides; Drive clamping plate 39 clamping work pieces 51 through screw mandrel 37, nut 38, position, start variable-frequency motor; Through gear-tooth bar secondary 32 dolly 33 that moves right fast, make welding gun 10 stretch out the mouth of pipe of workpiece, electrode 21 arrives the run-on tab top of workpiece 51; Adjust crossbeam 5 and welding gun 10 in position longitudinally through the screw mandrel on motor 2, sprocket wheel link chain mechanism 7, worm-and-wheel gear 8, the column 3, nut on the slide block 4 again, make two spherical directive wheels 19 contact, avoid crossbeam 5 and welding gun 10 to become cantilever with the inwall of workpiece; Can improve its rigidity, but both weight reductions of crossbeam 5 of hollow further improve rigidity again; And be convenient to the setting of connection line and fiber tube 42, reduce radial dimension; By welding control system 50 adjustment swinging arc framves 20 electrode 21 is aligned by welding line; And start two wire-feed motor 45,46, and carrying out continuous, stable wire feed, water inlet pipe 16 is connected with circulating water cooling system with outlet pipe 17; This moment, variable-frequency motor was through speed governing; Dolly 33 adopts low speed to be moved to the left, and starting electrode 21 welds, up to the welding of accomplishing the whole piece weld seam; In the welding process, welding gun 10 keeps static because workpiece moves, and adds that two spherical directive wheels 19 contact with the workpiece inwall all the time; Play a supporting role, can significantly reduce the vibration of welding gun 10, improve its stability; Because the quality of workpiece 51 is bigger, the vibration when dolly moves is very little to the influence of workpiece 51, and workpiece 51 moves steadily; Distance between workpiece 51 and the welding electrode 21 keeps constant basically, can guarantee the forming quality of long tube welded seam; Because welding gun 10 keeps static, fiber tube 42,43 need not to move, and can cancel original transport, has reduced the radial dimension of welding gun 10, applicable to the workpiece of minimum 15 millimeters bores; But both weight reductions of tube connector 13 of hollow improve rigidity, inject cooling water through water inlet pipe 16 and outlet pipe 17 Butt welding guns 10; But Butt welding gun 10 is lowered the temperature again; Even use in the small-bore workpiece that temperature is very high in pipe for a long time, welding gun 10 is not yielding yet, thereby guarantees welding quality; Swinging arc frame 20 can be adjusted weld width automatically, and the duty when camera 22 can be observed welding so that adjust corresponding parts at any time, is guaranteed welding quality.
Claims (7)
1. a small-bore long tube inside weld welding machine comprises base, welding gun system, wire feeder, travelling car system and welding control system, and the welding gun system comprises motor, column, slide block, crossbeam and welding gun; On column, be provided with screw mandrel and guide rail longitudinally; Screw mandrel links to each other through speed reduction gearing with motor, is installed with on the slide block and the screw mandrel nut engaged, and on this slide block, is provided with the roller that cooperates with guide rail; It is characterized in that said crossbeam is hollow tube and connects firmly on slide block; The tube connector of at least three hollows that welding gun comprises front end-plate and the end plate of hollow, connect firmly with forward and backward end plate is equipped with dividing plate in the forward and backward end plate, on front end-plate, is fixedly connected with water inlet pipe and outlet pipe that different inner chambers with it communicate; Also be provided with Connection Block at front end-plate; Connection Block links to each other with the front end of crossbeam, between tube connector, is installed with the swinging arc frame, and welding electrode is fixed on the swinging arc frame; Said travelling car system comprises through two guideways and gear-tooth bar pair and is installed on dolly on the base, is fixedly arranged on the variable-frequency motor of dolly bottom and is fixedly arranged at least two cover locating clamping devices on the dolly; Said tooth bar is fixed on the base; Gear is loaded on the output shaft of variable-frequency motor; Every cover locating clamping device comprises the location-plate that is fixedly arranged on the dolly, two rollers that are installed on the location-plate middle part, and two rollers on the different location-plates are coaxial respectively, are equipped with rotatable screw mandrel at every location-plate two ends; Nut all is housed on the screw mandrel; Each nut and clamping plate separately connect firmly, and nut is provided with slide rail and the chute that cooperates with location-plate, and the end of screw mandrel is equipped with handle; Said wire feeder comprises silk dish, is located at slide block, in the crossbeam, Connection Block, front end-plate and the fiber tube between the tube connector, welding wire is around in that the silk dish is gone up and its front end passes fiber tube, before the silk dish, is provided with a wire-feed motor; Welding control system links to each other with welding electrode, swinging arc frame, wire-feed motor through circuit.
2. small-bore long tube inside weld welding machine as claimed in claim 1; It is characterized in that said speed reduction gearing comprises sprocket wheel link chain mechanism and worm-and-wheel gear; Worm gear is loaded on the end of screw mandrel, and two sprocket wheels of sprocket wheel link chain mechanism are loaded on respectively in the rotating shaft of worm screw and motor.
3. according to claim 1 or claim 2 small-bore long tube inside weld welding machine is characterized in that the lower end of said Connection Block is connected with two spherical directive wheels.
4. small-bore long tube inside weld welding machine as claimed in claim 3 it is characterized in that said tube connector is the elliptical tube of hollow, and long axis of ellipse is positioned at vertically.
5. small-bore long tube inside weld welding machine as claimed in claim 4 is characterized in that said wire feeder also comprises the front end wire-feed motor of being located in the Connection Block, and this wire-feed motor links to each other with welding control system through circuit.
6. small-bore long tube inside weld welding machine as claimed in claim 5 is characterized in that on base, being provided with one or more gate beam runing rest.
7. small-bore long tube inside weld welding machine as claimed in claim 6 is characterized in that on tube connector, also being installed with camera, and a display links to each other with camera.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203069782U CN202212674U (en) | 2011-08-22 | 2011-08-22 | Welder for inside weld of small-bore long pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203069782U CN202212674U (en) | 2011-08-22 | 2011-08-22 | Welder for inside weld of small-bore long pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202212674U true CN202212674U (en) | 2012-05-09 |
Family
ID=46011944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203069782U Withdrawn - After Issue CN202212674U (en) | 2011-08-22 | 2011-08-22 | Welder for inside weld of small-bore long pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202212674U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284770A (en) * | 2011-08-22 | 2011-12-21 | 四川惊雷科技股份有限公司 | Welding machine of welding lines in minor-caliber long tube |
| CN102935542A (en) * | 2012-11-28 | 2013-02-20 | 南京奥特电气股份有限公司 | Extension type inner circumferential welding device |
| CN103056488A (en) * | 2013-01-23 | 2013-04-24 | 北京赛德高科铁道电气科技有限责任公司 | Welding plant for section-variable aluminum alloy long pipe fittings |
| CN103418899A (en) * | 2013-07-22 | 2013-12-04 | 南京德邦金属装备工程股份有限公司 | Plasma welding machine used for backing welding inside pipeline |
| CN106607639A (en) * | 2015-10-26 | 2017-05-03 | 镇江中焱数控设备有限公司 | Automatic welding machine for stainless steel circumferential weld |
| CN110293357A (en) * | 2019-07-01 | 2019-10-01 | 成都焊研威达科技股份有限公司 | Welding device applied to box-girder |
-
2011
- 2011-08-22 CN CN2011203069782U patent/CN202212674U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284770A (en) * | 2011-08-22 | 2011-12-21 | 四川惊雷科技股份有限公司 | Welding machine of welding lines in minor-caliber long tube |
| CN102284770B (en) * | 2011-08-22 | 2013-04-03 | 四川惊雷科技股份有限公司 | Welding machine of welding lines in minor-caliber long tube |
| CN102935542A (en) * | 2012-11-28 | 2013-02-20 | 南京奥特电气股份有限公司 | Extension type inner circumferential welding device |
| CN103056488A (en) * | 2013-01-23 | 2013-04-24 | 北京赛德高科铁道电气科技有限责任公司 | Welding plant for section-variable aluminum alloy long pipe fittings |
| CN103418899A (en) * | 2013-07-22 | 2013-12-04 | 南京德邦金属装备工程股份有限公司 | Plasma welding machine used for backing welding inside pipeline |
| CN103418899B (en) * | 2013-07-22 | 2015-09-23 | 南京德邦金属装备工程股份有限公司 | A kind of plasma welding machine for pipe interior bottoming welding |
| CN106607639A (en) * | 2015-10-26 | 2017-05-03 | 镇江中焱数控设备有限公司 | Automatic welding machine for stainless steel circumferential weld |
| CN110293357A (en) * | 2019-07-01 | 2019-10-01 | 成都焊研威达科技股份有限公司 | Welding device applied to box-girder |
| CN110293357B (en) * | 2019-07-01 | 2021-02-09 | 成都焊研威达科技股份有限公司 | Splice welding device applied to box beam |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120509 Effective date of abandoning: 20130403 |
|
| RGAV | Abandon patent right to avoid regrant |