CN104526206B - Interior protective device reprocessed by stainless steel tube - Google Patents
Interior protective device reprocessed by stainless steel tube Download PDFInfo
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- CN104526206B CN104526206B CN201410845643.6A CN201410845643A CN104526206B CN 104526206 B CN104526206 B CN 104526206B CN 201410845643 A CN201410845643 A CN 201410845643A CN 104526206 B CN104526206 B CN 104526206B
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- bearing
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- steel tube
- air drain
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- 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
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
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Abstract
Interior protective device reprocessed by stainless steel tube, belongs to welder technical field, comprises travelling car, arrangement for adjusting height, rotation adjustment device, angle regulator, push rod, air drain, tracheae and endoscope; Arrangement for adjusting height is arranged at above travelling car; Rotation adjustment device is arranged at above arrangement for adjusting height; Angle regulator is arranged at above rotation adjustment device; Air drain is arranged at above angle regulator.Inside weld gas shield when gas shielded device is mainly used in stainless steel tube repair welding reprocessed by this stainless steel tube, prevents from welding the oxidation of rear weld seam, and after making repair welding, appearance of weld is good.
Description
Technical field
The invention belongs to welder technical field, be particularly related to stainless steel tube and reprocess interior protective device.
Background technology
After defect appears in stainless steel tube, need to reprocess.But, reprocess post use inside weld in protective device, occur also there not being corresponding product on the market.At present, according to the size of caliber, plant site mainly contains three kinds of modes and realizes inside weld gas endogenous protective effect:
The first, be more than or equal to Φ 426mm for caliber, the operative employee of single slight of stature can crawl in pipe, inside the pipe using the support member such as waddy directly air drain to be withstood to be attached to weld seam to be reprocessed, like this, protective gas is exported from air drain by tracheae, reaches effect of inside weld gas endogenous protective;
The second, Φ 426mm is less than for caliber, people can not position air drain, general structure is the support that design is fixed, and air drain is fixed on support, and contact portion adopts soft high temperature resistant material to produce cut to prevent air drain and inside pipe wall, this mode manually not easily determines the concrete position of managing interior defect, only have the air drain by making overlength to strengthen protection domain, drawback is that displacement is large, and production cost is high;
The third, be less than or equal to the small-bore stainless steel tube of Φ 219mm for caliber, adopting maximum is that the two ends of pipe are tamping, and from one end input protection gas, such protective gas is full of in whole pipe, reaches the effect of interior protection, but air consumption is also quite surprising.
Summary of the invention
The object of the invention is to overcome the above-mentioned defect mentioned and deficiency, and provide stainless steel tube to reprocess interior protective device.
The technical scheme realizing the employing of this object is as follows.
Interior protective device reprocessed by stainless steel tube, comprises travelling car, arrangement for adjusting height, rotation adjustment device, angle regulator, push rod, air drain, tracheae and endoscope; Arrangement for adjusting height is arranged at above travelling car; Rotation adjustment device is arranged at above arrangement for adjusting height; Angle regulator is arranged at above rotation adjustment device; Air drain is arranged at above angle regulator; Described travelling car comprises top board, side plate and wheel; Described side plate is symmetricly set on top board both sides; Described vehicle wheel rotation is connected to side plate interior sides; Described arrangement for adjusting height comprises cylinder base and cylinder; Described cylinder base is fixed on top board; Described cylinder is fixed on cylinder base; The output of cylinder is provided with piston; Described top land connects the rotating shaft of rotation adjustment device by swivel joint; Described rotating shaft and piston coaxial are arranged.
Described wheel comprises annulus wheel and the round platform wheel of concentric setting; The diameter of annulus wheel is greater than the maximum gauge of round platform wheel; Described round platform wheel is fixedly installed on annulus wheel inner side.
Described swivel joint comprises fitting sleeve, upper back-up ring, upper taper roll bearing, lower taper roll bearing and lower back-up ring; Top land wears and is fixed on fitting sleeve; Described upper taper roll bearing and lower taper roll bearing concentric arrange and are disposed in fitting sleeve inside; Described upper back-up ring is arranged at fitting sleeve inside and is arranged in above taper roll bearing; Described lower back-up ring is arranged at fitting sleeve inside and is arranged in below lower taper roll bearing.
Described rotation adjustment device comprises rotating shaft and upper backup pad; Described rotating shaft is arranged in upper backup pad; Described upper backup pad is provided with linear bearing, bearing holder (housing, cover), clutch shaft bearing and the second bearing; Described bearing holder (housing, cover) inwall arranges linear bearing, pad and inner shield ring; Conflicting in described linear bearing top has pad, and conflicting in bottom has inner shield ring; Described bearing holder (housing, cover) outer wall is equipped with clutch shaft bearing, the second bearing and outer back-up ring; Spacer sleeve is provided with between described clutch shaft bearing, the second bearing; Described clutch shaft bearing top and bearing holder (housing, cover) are conflicted; Described second bearing bottom and outer back-up ring are conflicted; Rotating shaft is arranged in linear bearing; Be fixedly connected with inner rotary table above bearing holder (housing, cover), inner rotary table is connected with outer rotary table by belt; Described outer rotary table is rotationally connected with push rod; The top board of travelling car is fixed in described push rod inner end.
Described angle regulator comprises determines block, fixed head, upper motion block down; Describedly determine block and be fixed on rotating shaft top down; Determine down two ends, block left and right protruding, medial recess; Describedly determine both sides before and after block and be fixed with fixed head down; Motion block is folded with between two pieces of fixed heads; The both sides, front and back of described upper motion block arrange the draw runner in arc-shaped; The chute adapted with draw runner is provided with inside described fixed head; Described draw runner is embedded at chute; Described draw runner is fixedly installed tooth bar; Described tooth bar is engaged with gear; Described fixed head is equipped with angulation knob; Gear centre is fixed on inside angulation knob.
Described air drain is fixed on above angle regulator; Described air drain comprises header board, rear plate, left plate, right panel and base plate; Described header board, rear plate, left plate, right panel are fixed on base plate surrounding and are enclosed to form the cuboid of upper opening with base plate; Slot is offered in the middle part of described rear plate.
Described tracheae comprises two and is in charge of and a house steward; Be in charge of for two and take the shape of the letter U and be intersected in house steward; Described house steward is inserted in slot; Describedly be in charge of the basal edge fitting in air drain; The described inner side be in charge of offers the venthole of equidistantly distribution.
Pole is extended in described air drain front portion, and described pole is fixed with endoscope; Described endoscope is provided with lamp pearl.
Inside weld gas shield when gas shielded device is mainly used in stainless steel tube repair welding reprocessed by this stainless steel tube, prevents from welding the oxidation of rear weld seam, and after making repair welding, appearance of weld is good.
1. this device is provided with arrangement for adjusting height, be applicable to full specification stainless steel tube reprocess and use gas endogenous protective.Consider and the size of whole device is done too hour cost is too high, therefore the stainless steel tube that this device is applicable to caliber more than specification Φ 219mm is reprocessed and used gas endogenous protective.Realized the docile of air drain and inside weld by arrangement for adjusting height, save air consumption.Cylinder is in backhaul state, and air drain does not contact with inside pipe wall, can not produce scratch, also ensure that product quality like this while cost-saving.
2. this device is provided with rotation adjustment device.When travelling car being pushed stainless steel tube and being inner, the movement of the travelling car of long distance, makes travelling car depart from original track unavoidably, cause air drain and weld seam not parallel.Therefore, regulate rotation adjustment device, can ensure that air drain is parallel with weld seam.And the control assembly of rotation adjustment device is arranged on stainless steel tube outside, regulate very convenient.
3. this device is provided with angle regulator.When the axis of angle regulator perpendicular to stainless steel tube, air drain can be made around stainless steel tube middle shaft rotation certain angle, be applicable to weld seam and reprocess post not on stainless steel tube top.When angle regulator is parallel to the axis of stainless steel tube, the axis of air drain and stainless steel tube can be made at an angle, and what be applicable to conical stainless steel tube reprocesses post.
4. this device is provided with endoscope, in order to spy on the weld seam situation above air drain, can long distance positioning stainless steel tube inside weld defective locations, and the on-the-spot reclamation work of convenient operation work.
5. this device is provided with travelling car.Travelling car, as the transmission carrier of whole device, realizes the movement of whole device in pipe by a push rod.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A face sectional view of Fig. 1;
Fig. 3 is the structural representation of swivel joint;
Fig. 4 is the structural representation of rotation adjustment device;
Fig. 5 is the structural representation of angle regulator;
Fig. 6 is the structural representation of air drain;
Fig. 7 is the structural representation of tracheae;
In figure: travelling car 100, top board 110, side plate 120, wheel 130, annulus wheel 131, round platform wheel 132, push rod 140, arrangement for adjusting height 200, cylinder base 201, cylinder 202, piston 203, swivel joint 300, fitting sleeve 301, upper back-up ring 302, upper taper roll bearing 303, lower taper roll bearing 304, lower back-up ring 305, rotation adjustment device 400, rotating shaft 401, upper backup pad 402, pad 403, linear bearing 404, inner shield ring 405, bearing holder (housing, cover) 406, clutch shaft bearing 407, spacer sleeve 408, second bearing 409, outer back-up ring 410, inner rotary table 411, belt 412, outer rotary table 413, angle regulator 500, determine down block 510, fixed head 520, chute 521, angulation knob 530, gear 540, upper motion block 550, draw runner 551, tooth bar 552, air drain 600, header board 610, left plate 620, rear plate 630, slot 631, right panel 640, base plate 650, tracheae 700, be in charge of 710, venthole 711, house steward 720, endoscope 800, pole 801.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Interior protective device reprocessed by stainless steel tube, comprises travelling car 100, arrangement for adjusting height 200, rotation adjustment device 400, angle regulator 500, push rod 140, air drain 600, tracheae 700 and endoscope 800.
Arrangement for adjusting height 200 is arranged at above travelling car 100.Rotation adjustment device 400 is arranged at above arrangement for adjusting height 200.Angle regulator 500 is arranged at above rotation adjustment device 400.Air drain 600 is arranged at above angle regulator 500.
Described travelling car 100 comprises top board 110, side plate 120 and wheel 130.Described side plate 120 is symmetricly set on top board 110 both sides.Described wheel 130 is rotatably connected on inside side plate 120.As preferably, on the side plate 120 of both sides all before and after correspondence be provided with 2 wheels 130.Therefore, this travelling car 100 has 4 wheels 130.Described wheel 130 comprises annulus wheel 131 and the round platform wheel 132 of concentric setting.The diameter of annulus wheel 131 is greater than the maximum gauge of round platform wheel 132.Described round platform wheel 132 is fixedly installed on inside annulus wheel 131.Therefore, when travelling car 100 is positioned over stainless steel tube inside, only have annulus to take turns the inwall of 131 contact stainless steel tubes.Round platform wheel 132 is arranged on inside annulus wheel 131, and avoid round platform to take turns 132 on the one hand and touch stainless steel inside pipe wall, protection stainless steel inside pipe wall by the scraping of round platform wheel 132, on the other hand, does not reduce the center of gravity of whole device, more firm time mobile.
Described arrangement for adjusting height 200 is arranged at above travelling car 100.Described arrangement for adjusting height 200 comprises cylinder base 201 and cylinder 202.Described cylinder base 201 is fixed on top board 110.Described cylinder 202 is fixed on cylinder base 201.The output of cylinder 202 is provided with piston 203.
Described piston 203 top connects the rotating shaft 401 of rotation adjustment device 400 by swivel joint 300.Described rotating shaft 401 and piston 203 are coaxially arranged.
Described swivel joint 300 comprises fitting sleeve 301, upper back-up ring 302, upper taper roll bearing 303, lower taper roll bearing 304 and lower back-up ring 305.Piston 203 top wears and is fixed on fitting sleeve 301.Described upper taper roll bearing 303 and lower taper roll bearing 304 concentric arrange and are disposed in fitting sleeve 301 inside.Described upper back-up ring 302 is arranged at fitting sleeve 301 inside and is arranged in above taper roll bearing 303.Described lower back-up ring 305 is arranged at fitting sleeve 301 inside and is arranged in below lower taper roll bearing 304.The setting of swivel joint 300, make rotating shaft 401 vertical cube to piston 203 synchronization action while, rotating shaft 401 can also around axis rotation.
Described rotation adjustment device 400 comprises rotating shaft 401 and upper backup pad 402.
Described rotating shaft 401 is arranged in upper backup pad 402.Described upper backup pad 402 is provided with linear bearing 404, bearing holder (housing, cover) 406, clutch shaft bearing 407 and the second bearing 409.Described bearing holder (housing, cover) 406 inwall arranges linear bearing 404, pad 403 and inner shield ring 405.Conflicting in described linear bearing 404 top has pad 403, and conflicting in bottom has inner shield ring 405.Described bearing holder (housing, cover) 406 outer wall is equipped with clutch shaft bearing 407, second bearing 409 and outer back-up ring 410.Spacer sleeve 408 is provided with between described clutch shaft bearing 407, second bearing 409.Described clutch shaft bearing 407 top and bearing holder (housing, cover) 406 are conflicted.Described second bearing 409 bottom and outer back-up ring 410 are conflicted.Rotating shaft 401 is arranged in linear bearing 404.Be fixedly connected with inner rotary table 411 above bearing holder (housing, cover) 406, inner rotary table 411 is connected with outer rotary table 413 by belt 412.Described outer rotary table 413 is rotationally connected with push rod 140.The top board 110 of travelling car 100 is fixed in described push rod 140 inner end.
Operating personnel rotates outer rotary table 413, drives inner rotary table 411 to rotate by belt 412, and inner rotary table 411 is rotated by bearing holder (housing, cover) 406 and linear bearing 404 driven rotary axle 401, thus the rotational angle of adjustment rotating shaft 401.
Described angle regulator 500 comprises determines block 510, fixed head 520, upper motion block 550 down.
Describedly determine block 510 and be fixed on rotating shaft 401 top down.Determine down block about 510 two ends protruding, medial recess, in order to the anglec of rotation of spacing upper motion block 550.Describedly determine both sides before and after block 510 and be fixed with fixed head 520 down.Motion block 550 is folded with between two pieces of fixed heads 520.The both sides, front and back of described upper motion block 550 arrange the draw runner 551 in arc-shaped.The chute 521 adapted with draw runner 551 is provided with inside described fixed head 520; Described draw runner 551 is embedded at chute 521.Described draw runner 551 is fixedly installed tooth bar 552; Described tooth bar 552 is engaged with gear 540.Described fixed head 520 is equipped with angulation knob 530.Gear 540 center is fixed on inside angulation knob 530.
Rotational angle knob 530, rotates tooth bar 552 and draw runner 551 by gear 540, and draw runner 551 is along chute 521 action, and upper motion block 550 is determined block 510 deflect certain angle relative to lower, thus realizes the adjustment of angle.
Described air drain 600 is fixed on above angle regulator 500.More specifically, described air drain 600 is fixed on motion block 550.Described air drain 600 comprises header board 610, rear plate 630, left plate 620, right panel 640 and base plate 650.Described header board 610, rear plate 630, left plate 620, right panel 640 are fixed on base plate 650 surrounding and are enclosed to form the cuboid of upper opening with base plate 650.Slot 631 is offered in the middle part of described rear plate 630.
Described tracheae 700 comprises two and is in charge of 710 and a house steward 720.Be in charge of 710 for two take the shape of the letter U and be intersected in house steward 720.Described house steward 720 is inserted in slot 631.Describedly be in charge of the basal edge that 710 fit in air drain 600.The described inner side being in charge of 710 offers the venthole 711 of equidistantly distribution.
Protective gas enters from house steward 720 is in charge of 710, and discharges from venthole 711, fills whole air drain 600.Be in charge of 710 for two to take the shape of the letter U to prevent tracheae 700 from rotating, be in charge of the basal edge that 710 fit in air drain 600, rock in order to prevent tracheae 700.
Pole 801 is extended in described air drain 600 front portion, and described pole 801 is fixed with endoscope 800.Described endoscope 800 is provided with lamp pearl.
Endoscope 800, in order to observe weld seam, is convenient to the orientation adjusting this device.Lamp pearl is in order to illumination.
The present invention is illustrated according to embodiment, and under the prerequisite not departing from present principles, this device can also make some distortion and improvement.It should be pointed out that and all drop on the technical scheme that all employings are equal to replacement or the mode such as equivalent transformation and obtain in protection scope of the present invention.
Claims (7)
1. interior protective device reprocessed by stainless steel tube, it is characterized in that, comprise travelling car (100), arrangement for adjusting height (200), rotation adjustment device (400), angle regulator (500), push rod (140), air drain (600), tracheae (700) and endoscope (800); Arrangement for adjusting height (200) is arranged at travelling car (100) top; Rotation adjustment device (400) is arranged at arrangement for adjusting height (200) top; Angle regulator (500) is arranged at rotation adjustment device (400) top; Air drain (600) is arranged at angle regulator (500) top; Described travelling car (100) comprises top board (110), side plate (120) and wheel (130); Described side plate (120) is symmetricly set on top board (110) both sides; Described wheel (130) is rotatably connected on side plate (120) inner side; Described arrangement for adjusting height (200) comprises cylinder base (201) and cylinder (202); Described cylinder base (201) is fixed on top board (110); Described cylinder (202) is fixed on cylinder base (201); The output of cylinder (202) is provided with piston (203); Described piston (203) top connects the rotating shaft (401) of rotation adjustment device (400) by swivel joint (300); Described rotating shaft (401) and piston (203) are coaxially arranged; Described angle regulator (500) comprises determines block (510), fixed head (520), upper motion block (550) down; Describedly determine block (510) and be fixed on rotating shaft (401) top down; Determine down block (510) two ends, left and right protruding, medial recess; Describedly determine both sides before and after block (510) and be fixed with fixed head (520) down; Motion block (550) is folded with between two pieces of fixed heads (520); The both sides, front and back of described upper motion block (550) arrange the draw runner (551) in arc-shaped; Described fixed head (520) inner side is provided with the chute (521) adapted with draw runner (551); Described draw runner (551) is embedded at chute (521); Described draw runner (551) is fixedly installed tooth bar (552); Described tooth bar (552) is engaged with gear (540); Described fixed head (520) is equipped with angulation knob (530); Gear (540) center is fixed in angulation knob (530) inner side.
2. interior protective device reprocessed by stainless steel tube as claimed in claim 1, it is characterized in that, described wheel (130) comprises annulus wheel (131) and round platform wheel (132) of concentric setting; The diameter of annulus wheel (131) is greater than the maximum gauge of round platform wheel (132); Described round platform wheel (132) is fixedly installed on annulus wheel (131) inner side.
3. interior protective device reprocessed by stainless steel tube as claimed in claim 1, it is characterized in that, described swivel joint (300) comprises fitting sleeve (301), upper back-up ring (302), upper taper roll bearing (303), lower taper roll bearing (304) and lower back-up ring (305); Piston (203) top wears and is fixed on fitting sleeve (301); Described upper taper roll bearing (303) and lower taper roll bearing (304) concentric arrange and are disposed in fitting sleeve (301) inside; Described upper back-up ring (302) is arranged at fitting sleeve (301) inside and is arranged in taper roll bearing (303) top; Described lower back-up ring (305) is arranged at fitting sleeve (301) inside and is arranged in lower taper roll bearing (304) below.
4. interior protective device reprocessed by stainless steel tube as claimed in claim 1, and it is characterized in that, described rotation adjustment device (400) comprises rotating shaft (401) and upper backup pad (402); Described rotating shaft (401) is arranged in upper backup pad (402); Described upper backup pad (402) is provided with linear bearing (404), bearing holder (housing, cover) (406), clutch shaft bearing (407) and the second bearing (409); Described bearing holder (housing, cover) (406) inwall arranges linear bearing (404), pad (403) and inner shield ring (405); Conflicting in described linear bearing (404) top has pad (403), and conflicting in bottom has inner shield ring (405); Described bearing holder (housing, cover) (406) outer wall is equipped with clutch shaft bearing (407), the second bearing (409) and outer back-up ring (410); Spacer sleeve (408) is provided with between described clutch shaft bearing (407), the second bearing (409); Described clutch shaft bearing (407) top and bearing holder (housing, cover) (406) are conflicted; Described second bearing (409) bottom and outer back-up ring (410) are conflicted; Rotating shaft (401) is arranged in linear bearing (404); Bearing holder (housing, cover) (406) top is fixedly connected with inner rotary table (411), and inner rotary table (411) is connected with outer rotary table (413) by belt (412); Described outer rotary table (413) is rotationally connected with push rod (140); The top board (110) of travelling car (100) is fixed in described push rod (140) inner end.
5. interior protective device reprocessed by stainless steel tube as claimed in claim 1, it is characterized in that, described air drain (600) is fixed on angle regulator (500) top; Described air drain (600) comprises header board (610), rear plate (630), left plate (620), right panel (640) and base plate (650); Described header board (610), rear plate (630), left plate (620), right panel (640) are fixed on base plate (650) surrounding and are enclosed to form the cuboid of upper opening with base plate (650); Described rear plate (630) middle part offers slot (631).
6. interior protective device reprocessed by stainless steel tube as claimed in claim 1, and it is characterized in that, described tracheae (700) comprises two and is in charge of (710) and a house steward (720); Be in charge of (710) for two take the shape of the letter U and be intersected in house steward (720); Described house steward (720) is inserted in slot (631); Describedly be in charge of the basal edge that (710) fit in air drain (600); The described inner side being in charge of (710) offers the venthole (711) of equidistantly distribution.
7. interior protective device reprocessed by stainless steel tube as claimed in claim 1, and it is characterized in that, pole (801) is extended in described air drain (600) front portion, described pole (801) is fixed with endoscope (800); (800) are provided with lamp pearl with described endoscope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845643.6A CN104526206B (en) | 2014-12-31 | 2014-12-31 | Interior protective device reprocessed by stainless steel tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410845643.6A CN104526206B (en) | 2014-12-31 | 2014-12-31 | Interior protective device reprocessed by stainless steel tube |
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| Publication Number | Publication Date |
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| CN104526206A CN104526206A (en) | 2015-04-22 |
| CN104526206B true CN104526206B (en) | 2015-12-30 |
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| CN201410845643.6A Active CN104526206B (en) | 2014-12-31 | 2014-12-31 | Interior protective device reprocessed by stainless steel tube |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107116288A (en) * | 2017-04-28 | 2017-09-01 | 成都大漠石油技术有限公司 | It is easy to improve the device of pipe girth weld quality |
| CN110369918A (en) * | 2019-08-07 | 2019-10-25 | 山西航天清华装备有限责任公司 | Pneumatic trolley for suspension arm of lorry-mounted crane welding |
| CN111843316A (en) * | 2020-08-12 | 2020-10-30 | 西安热工研究院有限公司 | Portable argon gas chamber device |
| CN114700659B (en) * | 2022-04-13 | 2023-12-05 | 江苏伍昌新材料科技有限公司 | Multifunctional protection device for welding stainless steel workpiece |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3539625B2 (en) * | 1999-05-13 | 2004-07-07 | Ｊｆｅスチール株式会社 | Internal bead rolling equipment for steel pipe |
| CN2719475Y (en) * | 2004-08-27 | 2005-08-24 | 大庆油田建设集团 | Pipeline in-soldering seam shielding-gas sealing device |
| CN201603953U (en) * | 2009-09-29 | 2010-10-13 | 中国核工业二三建设有限公司 | Regulating equipment for protection in welding pipeline |
| CN202701634U (en) * | 2012-06-26 | 2013-01-30 | 成都金凤液氮容器有限公司 | Stainless steel pipe welding internal protection device |
| CN202715938U (en) * | 2012-09-12 | 2013-02-06 | 浙江钢一管业有限公司 | Protective device in big-caliber welded pipe |
| CN204470816U (en) * | 2014-12-31 | 2015-07-15 | 浙江久立特材科技股份有限公司 | Interior protective device reprocessed by stainless steel tube |
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