CN105195961A - Pairing lengthening device for two-in-one pipeline - Google Patents
Pairing lengthening device for two-in-one pipeline Download PDFInfo
- Publication number
- CN105195961A CN105195961A CN201510691051.8A CN201510691051A CN105195961A CN 105195961 A CN105195961 A CN 105195961A CN 201510691051 A CN201510691051 A CN 201510691051A CN 105195961 A CN105195961 A CN 105195961A
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- Prior art keywords
- track
- roller
- slide plate
- screw mandrel
- group
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Classifications
-
- 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
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
-
- 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
- B23K2101/10—Pipe-lines
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
Abstract
The invention relates to a pairing lengthening device for a two-in-one pipeline and belongs to the technical field of equipment manufacture. The pairing lengthening device comprises a track and four pairing lengthening roller carriers, wherein the pairing lengthening roller carriers can be arranged on the track in the manner that the roller carriers can move along the track; each pairing lengthening roller carrier comprises radial roller adjusting devices, lifting devices and traveling devices; the traveling devices are mounted at the lower parts of the pairing lengthening roller carriers and arranged on the track in the manner that the traveling devices can move along the track; the radial roller adjusting devices can be mounted at the upper parts of the roller carriers in a vertically moving manner; the lifting devices are arranged between the traveling devices and the radial roller adjusting devices and are suitable for driving the radial roller adjusting devices to move vertically. According to the invention, since the pairing lengthening roller carriers adopt modular design, the design efficiency is improved and the production cycle is shortened.
Description
Technical field
The present invention relates to a kind of two and connect a pipe string extending device, belong to equipment manufacturing technology field.
Background technology
Along with the development of society, in city, various pipeline engineering is more and more universal, brings great convenience to the life various aspects of people.
Existing pipeline engineering is divided into pipe prefabrication, in-situ precast and in-site installation.Pipe prefabrication: carry out pipe design, prefabricated management, pipe cutting, tube groove processing, welding, logistics and the work such as antifouling paint, pipeline inspection in certain fixing region.Pipe prefabrication advantage: facilitate quality, progress, the coordination of management and control in fixing region, reduce in-situ precast and field erected workload, has great raising to the installation of whole project, quality, progress.
Universal due to pipeline engineering, to the demand also expanding day of pipeline, in the preset production process of pipeline, group to being the important ring that pipe prefabrication is produced, nowadays market therefrom in short tube group subtend long tube group to trend development.During current pipe prefabrication is produced, group is to wasting time and energy, accurate docking between corresponding pipeline needs to consume plenty of time adjustment, cause productivity ratio Slow lifting, and the group of short tube (covering with 12 meters, foot most) is right during existing technology mainly meets, greatly can reduce for middle long tube assembling precision, be difficult to well to complete group right.
Summary of the invention
The technical problem to be solved in the present invention is, not enough for prior art, proposes a kind of docking and accurately two connects a pipe string extending device easily.
The present invention is the technical scheme solving the problems of the technologies described above proposition: a kind of two connect a pipe string extending device, and comprise track and four group pair roller framves, the setting of group pair roller frame track-movable in orbit;
Group pair roller frame comprises radiai adjustment roller devices, lowering or hoisting gear and running gear, running gear be arranged on group pair roller frame bottom and the setting of track-movable in orbit, radiai adjustment roller devices is moving up and down is arranged on group pair roller frame top, and lowering or hoisting gear to be arranged between running gear and radiai adjustment roller devices and to be suitable for driving radiai adjustment roller devices to move up and down;
Radiai adjustment roller devices comprises roller seat, slide plate, handle, handwheel and two return idlers, two return idlers are symmetrical arranged, the axis of return idler and the axis of track are parallel to each other, slide plate is slidably arranged in roller seat, the glide direction of slide plate is mutually vertical with the axis of track, two return idlers are arranged on slide plate respectively, handle is arranged on roller seat side and moves for controlling the overall glide direction along slide plate of two return idlers, and handwheel is arranged on roller seat side for controlling two return idler relative slidings.
The improvement of technique scheme is: radiai adjustment roller devices also comprises rear sleeve, screw mandrel, front sleeve and external thread sleeve, the axis place of screw mandrel and handwheel is affixed, handwheel is arranged on roller seat side near handle place, rear sleeve and front sleeve are set in the two ends of screw mandrel, external thread sleeve and handle affixed, external thread sleeve to be arranged in front sleeve and to be threaded with front sleeve, below the slide plate at two return idler places, nut is installed, the internal thread rotation of two nuts is on the contrary, and screw mandrel is arranged through nut successively.
The improvement of technique scheme is: roller seat bosom is provided with limited block, and screw mandrel runs through limited block and arranges, and screw mandrel is positioned at limited block two ends and is provided with limit convex nearby.
The improvement of technique scheme is: track has two, and two parallel tracks are arranged.
The improvement of technique scheme is: lowering or hoisting gear comprises lifting pedestal, elevating bracket, lift, connecting axle and motor, elevating bracket is moving up and down to be arranged in lifting pedestal, the lower end of elevating bracket upper end and roller seat is affixed, lift is arranged in elevating bracket for driving elevating bracket to move up and down, lift has two, two lifts are connected by connecting axle, and the clutch end of motor is provided with shaft coupling, and motor drives two lifts by shaft coupling and connecting axle.
The improvement of technique scheme is: running gear comprises two pairs of wheels, and two pairs of wheels are symmetricly set on group pair roller frame bottom.
The present invention adopts the beneficial effect of technique scheme to be: (1) of the present invention group of pair roller frame all adopts modularized design, improves design efficiency, shortens the production cycle; (2) because two return idlers of radiai adjustment roller devices can relative sliding, the pipe fitting of different-diameter can be placed by regulating two direct distances of return idler, more stable when pipe fitting is placed can not accidental movement, adjustment during convenient docking is accurately to dock; (3) move because handle peace can control the overall glide direction along slide plate of two return idlers, the Level tune alignment function at two pipe fitting centers before and after realizing; (4) be suitable for driving radiai adjustment roller devices to move up and down because lowering or hoisting gear is arranged, by coordinating of lowering or hoisting gear and radiai adjustment roller devices, the level at the center of the pipe fitting on radiai adjustment roller devices can be realized and vertically regulate, make docking accurately convenient, and easy to operate, improve docking efficiency; (5) owing to track being provided with four group pair roller framves, two, centre is as active set pair roller frame, two of both sides is driven group of pair roller frame, two driven group of pair roller framves are utilized to be pipe string benchmark, by the three-dimensional regulation function of the top to bottom, left and right, front and rear of other two active set pair roller framves realize different-diameter, different length, different tube center height pipeline group to function, make docking docking accurately convenient; (6) this pipe string extending device is equipped with four group pair roller framves, and can dock two pipe fittings, guarantee that pipe prefabrication effective length reaches 24 meters, and this principle of device is simple, reliability is high, and compare like product processing and manufacturing difficulty low, materials are few, and cost is low; (7) because roller seat bosom is provided with limited block, screw mandrel runs through limited block and arranges, screw mandrel is positioned at limited block two ends and is provided with limit convex nearby, the overall sliding distance along slide plate of two return idlers is defined, prevents from causing because sliding distance is long overall crank to cause pipe fitting to come off or organizing the unexpected generations such as pair roller frame rollover.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the structural representation that the embodiment of the present invention two connects a pipe string extending device.
Fig. 2 is the side-looking structural representation that the embodiment of the present invention two connects a pipe string extending device.
Fig. 3 is the plan structure schematic diagram that the embodiment of the present invention two connects a pipe string extending device.
Fig. 4 is the structural representation that the embodiment of the present invention two connects the group pair roller frame of a pipe string extending device.
Fig. 5 is the stereogram that the embodiment of the present invention two connects the group pair roller frame of a pipe string extending device.
Fig. 6 is the structural representation that the embodiment of the present invention two connects the radiai adjustment roller devices of a pipe string extending device.
Fig. 7 is the structural representation that the embodiment of the present invention two connects the lowering or hoisting gear of a pipe string extending device.
Number in the figure is schematically as follows: 1-track; 2-group pair roller frame; 3-pipe fitting; 4-radiai adjustment roller devices; 4.1-roller seat; Sleeve after 4.2-; 4.3-nut; 4.4-screw mandrel; 4.5-limit convex; 4.6-limited block; 4.7-front sleeve; 4.8-external thread sleeve; 4.9-return idler; 4.10-slide plate; 4.11-handle; 4.12-handwheel; 5-lowering or hoisting gear; 5.1-lifting pedestal; 5.2-elevating bracket; 5.3-lift; 5.4-connecting axle; 5.5-shaft coupling; 5.6-motor; 6-running gear.
Detailed description of the invention
Embodiment
Two of the present embodiment connects a pipe string extending device, and comprise 1, four, track group pair roller frame 2 and two pipe fittings 3, group pair roller frame 2 can along the setting of track 1 movement on path 1; Track 1 has two, and two parallel tracks are arranged.
Group pair roller frame 2 comprises radiai adjustment roller devices 4, lowering or hoisting gear 5 and running gear 6, running gear 6 comprises two pairs of wheels, running gear 6 is arranged on group pair roller frame 2 bottom and can along the setting of track 1 movement on path 1, radiai adjustment roller devices 4 is moving up and down is arranged on group pair roller frame 2 top, and lowering or hoisting gear 5 to be arranged between running gear 6 and radiai adjustment roller devices 4 and to be suitable for driving radiai adjustment roller devices 4 to move up and down.
Radiai adjustment roller devices 4 comprises roller seat 4.1, slide plate 4.10, handle 4.11, handwheel 4.12 and two return idlers 4.9, two return idlers 4.9 are symmetrical arranged, the axis of return idler 4.9 and the axis of track 1 are parallel to each other, slide plate 4.10 is slidably arranged in roller seat 4.1, the glide direction of slide plate 4.10 is mutually vertical with the axis of track 1, two return idlers 4.9 are arranged on slide plate 4.10 respectively, handle 4.11 is arranged on roller seat 4.1 side and moves along the glide direction of slide plate 4.10 for controlling two return idler 4.9 entirety, handwheel 4.12 is arranged on roller seat 4.1 side for controlling two return idler 4.9 relative slidings.
Radiai adjustment roller devices 4 also comprises rear sleeve 4.2, screw mandrel 4.4, front sleeve 4.7 and external thread sleeve 4.8, screw mandrel 4.4 is affixed with the axis place of handwheel 4.12, handwheel 4.12 is arranged on roller seat 4.1 side near handle 4.11 place, rear sleeve 4.2 and front sleeve 4.7 are set in the two ends of screw mandrel 4.4, external thread sleeve 4.8 is affixed with handle 4.11, external thread sleeve 4.8 to be arranged in front sleeve 4.7 and to be threaded with front sleeve 4.7, below the slide plate 4.10 at two return idler 4.9 places, nut 4.3 is installed, the internal thread rotation of two nuts 4.3 is on the contrary, screw mandrel 4.4 is arranged through nut 4.3 successively.
Roller seat 4.1 bosom is provided with limited block 4.6, and screw mandrel 4.4 runs through limited block 4.6 and arranges, and screw mandrel 4.4 is positioned at limited block 4.6 two ends and is provided with limit convex 4.5 nearby.
Lowering or hoisting gear 5 comprises lifting pedestal 5.1, elevating bracket 5.2, lift 5.3, connecting axle 5.4 and motor 5.6, elevating bracket 5.2 is moving up and down to be arranged in lifting pedestal 5.1, the lower end of elevating bracket 5.2 upper end and roller seat 4.1 is affixed, lift 5.3 is arranged in elevating bracket 5.2 for driving elevating bracket 5.2 to move up and down, lift 5.3 has two, two lifts 5.3 are connected by connecting axle 5.4, the clutch end of motor 5.6 is provided with shaft coupling 5.5, and motor 5.6 drives two lifts by shaft coupling 5.5 and connecting axle 5.4.
This two connect one pipe string extending device work time, owing to track 1 being provided with four group pair roller framves 2, two, centre is as active set pair roller frame, two of both sides is driven group of pair roller frame, two driven group of pair roller framves are utilized to be pipe string benchmark, by the three-dimensional regulation function of the top to bottom, left and right, front and rear of other two active set pair roller framves realize different-diameter, different length, different tube center height pipeline group to function, make docking docking accurately convenient; This pipe string extending device is equipped with four group pair roller framves, can dock two pipe fittings, guarantee that pipe prefabrication effective length reaches 24 meters.
The present invention is not limited to above-described embodiment.All employings are equal to the technical scheme of replacing and being formed, and all drop on the protection domain of application claims.
Claims (6)
1. two connect a pipe string extending device, it is characterized in that: comprise track and four group pair roller framves, the setting of described group of pair roller frame track-movable in orbit;
Described group of pair roller frame comprises radiai adjustment roller devices, lowering or hoisting gear and running gear, described running gear is arranged on described group of pair roller frame bottom and can along the setting of described rail moving in orbit, described radiai adjustment roller devices is moving up and down is arranged on described group of pair roller frame top, and described lowering or hoisting gear to be arranged between described running gear and radiai adjustment roller devices and to be suitable for driving described radiai adjustment roller devices to move up and down;
Described radiai adjustment roller devices comprises roller seat, slide plate, handle, handwheel and two return idlers, described two return idlers are symmetrical arranged, the axis of described return idler and the axis of described track are parallel to each other, described slide plate is slidably arranged in described roller seat, the glide direction of described slide plate is mutually vertical with the axis of described track, described two return idlers are arranged on described slide plate respectively, described handle is arranged on described roller seat side and moves for controlling the overall glide direction along slide plate of described two return idlers, described handwheel is arranged on described roller seat side for controlling described two return idler relative slidings.
2. according to claim 1 two connect a pipe string extending device, it is characterized in that: described radiai adjustment roller devices also comprises rear sleeve, screw mandrel, front sleeve and external thread sleeve, the axis place of described screw mandrel and described handwheel is affixed, described handwheel is arranged on described roller seat side near described handle place, described rear sleeve and front sleeve are set in the two ends of described screw mandrel, described external thread sleeve and described handle affixed, described external thread sleeve to be arranged in described front sleeve and to be threaded with described front sleeve, below the slide plate at described two return idler places, nut is installed, the internal thread rotation of described two nuts is on the contrary, described screw mandrel is arranged through described nut successively.
3. according to claim 2 two connect a pipe string extending device, it is characterized in that: described roller seat bosom is provided with limited block, described screw mandrel runs through described limited block and arranges, and described screw mandrel is positioned at described limited block two ends and is provided with limit convex nearby.
4. according to claim 3 two connect a pipe string extending device, it is characterized in that: described track has two, described two parallel tracks are arranged.
5. according to claim 4 two connect a pipe string extending device, it is characterized in that: described lowering or hoisting gear comprises lifting pedestal, elevating bracket, lift, connecting axle and motor, described elevating bracket is moving up and down to be arranged in described lifting pedestal, the lower end of described elevating bracket upper end and described roller seat is affixed, described lift is arranged in described elevating bracket for driving described elevating bracket to move up and down, described lift has two, described two lifts are connected by connecting axle, the clutch end of described motor is provided with shaft coupling, described motor drives described two lifts by shaft coupling and connecting axle.
6. according to claim 5 two connect a pipe string extending device, it is characterized in that: described running gear comprises two pairs of wheels, described two pairs of wheels are symmetricly set on described group of pair roller frame bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510691051.8A CN105195961A (en) | 2015-10-22 | 2015-10-22 | Pairing lengthening device for two-in-one pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510691051.8A CN105195961A (en) | 2015-10-22 | 2015-10-22 | Pairing lengthening device for two-in-one pipeline |
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| Publication Number | Publication Date |
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| CN105195961A true CN105195961A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510691051.8A Pending CN105195961A (en) | 2015-10-22 | 2015-10-22 | Pairing lengthening device for two-in-one pipeline |
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Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818075A (en) * | 2016-05-18 | 2016-08-03 | 建湖县永维阀门钻件有限公司 | Butt-joint device for pipe fittings of water-resisting pipe |
| CN106623515A (en) * | 2016-12-30 | 2017-05-10 | 深圳赤湾胜宝旺工程有限公司 | Heavy steel pipe matching and assembling method and system |
| CN108544172A (en) * | 2018-04-24 | 2018-09-18 | 马鞍山市中天机械制造安装有限公司 | A kind of wear-resisting fagging welding turntable of water slag groove |
| CN108637583A (en) * | 2018-06-25 | 2018-10-12 | 广东国哲自动化设备有限公司 | A kind of grouping machine |
| CN108907402A (en) * | 2018-09-17 | 2018-11-30 | 山东茂盛管业有限公司 | A kind of spiral steel pipe divided edge molding device |
| CN109026116A (en) * | 2018-10-10 | 2018-12-18 | 贵州大学 | A kind of coal mining is connected and fixed device with ventilation blower pipeline |
| CN109291200A (en) * | 2018-10-10 | 2019-02-01 | 徐州格非家居有限公司 | It is a kind of to facilitate furniture docking facilities |
| CN109290808A (en) * | 2018-09-26 | 2019-02-01 | 昆山华恒焊接股份有限公司 | Pipeline modularization prefabricated production line and pipeline module method for prefabricating |
| CN109570886A (en) * | 2018-12-11 | 2019-04-05 | 中铁五局集团贵州工程有限公司 | A kind of welding tooling and steel pipe for steel pipe butt welding is to welding method |
| CN110092205A (en) * | 2019-04-22 | 2019-08-06 | 浙江固特气动科技股份有限公司 | A kind of lime stone handling system |
| CN110814692A (en) * | 2019-11-29 | 2020-02-21 | 西安航天动力测控技术研究所 | Multi-degree-of-freedom docking tool for engine separation test and assembling method |
| CN111043397A (en) * | 2019-12-30 | 2020-04-21 | 云南驰宏锌锗股份有限公司 | Device convenient to heavy pipeline of tunnel installation in pit |
| CN111299952A (en) * | 2020-03-10 | 2020-06-19 | 沧州渤海石化工程有限公司 | Petroleum pipeline group is to welding set |
| WO2020155457A1 (en) * | 2019-01-30 | 2020-08-06 | 汪卫东 | Three-dimensional adjustment pipeline bracket used for pipeline alignment |
| CN112207503A (en) * | 2020-09-07 | 2021-01-12 | 宜昌江峡船用机械有限责任公司 | Accurate adjustment butt joint device and method for large pressure container |
| CN112935697A (en) * | 2021-04-09 | 2021-06-11 | 郑州越达科技装备有限公司 | Straight seam welding and group welding equipment for large-diameter cylinder |
| CN113212525A (en) * | 2021-06-04 | 2021-08-06 | 四川航天长征装备制造有限公司 | Multifunctional butt-joint rack vehicle |
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| CN113798774A (en) * | 2021-11-08 | 2021-12-17 | 兖州煤业股份有限公司 | Pipe butt joint auxiliary device |
| CN113857765A (en) * | 2021-10-28 | 2021-12-31 | Dig自动化工程（武汉）有限公司 | Pipeline extension assembly quality |
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| CN114833499A (en) * | 2022-05-26 | 2022-08-02 | 中国核工业第二二建设有限公司 | Auxiliary device and method for mounting large-diameter pipeline in limited space of tunnel |
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Cited By (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105818075B (en) * | 2016-05-18 | 2017-05-03 | 建湖县永维阀门钻件有限公司 | Butt-joint device for pipe fittings of water-resisting pipe |
| CN105818075A (en) * | 2016-05-18 | 2016-08-03 | 建湖县永维阀门钻件有限公司 | Butt-joint device for pipe fittings of water-resisting pipe |
| CN106623515B (en) * | 2016-12-30 | 2019-04-30 | 深圳赤湾胜宝旺工程有限公司 | Heavy steel tube matching and group are to method and system |
| CN106623515A (en) * | 2016-12-30 | 2017-05-10 | 深圳赤湾胜宝旺工程有限公司 | Heavy steel pipe matching and assembling method and system |
| CN108544172A (en) * | 2018-04-24 | 2018-09-18 | 马鞍山市中天机械制造安装有限公司 | A kind of wear-resisting fagging welding turntable of water slag groove |
| CN108637583A (en) * | 2018-06-25 | 2018-10-12 | 广东国哲自动化设备有限公司 | A kind of grouping machine |
| CN108907402A (en) * | 2018-09-17 | 2018-11-30 | 山东茂盛管业有限公司 | A kind of spiral steel pipe divided edge molding device |
| CN109290808A (en) * | 2018-09-26 | 2019-02-01 | 昆山华恒焊接股份有限公司 | Pipeline modularization prefabricated production line and pipeline module method for prefabricating |
| CN109290808B (en) * | 2018-09-26 | 2024-06-07 | 昆山华恒焊接股份有限公司 | Pipeline modularization prefabrication production line and pipeline module prefabrication method |
| CN109291200A (en) * | 2018-10-10 | 2019-02-01 | 徐州格非家居有限公司 | It is a kind of to facilitate furniture docking facilities |
| CN109026116A (en) * | 2018-10-10 | 2018-12-18 | 贵州大学 | A kind of coal mining is connected and fixed device with ventilation blower pipeline |
| CN109570886A (en) * | 2018-12-11 | 2019-04-05 | 中铁五局集团贵州工程有限公司 | A kind of welding tooling and steel pipe for steel pipe butt welding is to welding method |
| WO2020155457A1 (en) * | 2019-01-30 | 2020-08-06 | 汪卫东 | Three-dimensional adjustment pipeline bracket used for pipeline alignment |
| CN110092205B (en) * | 2019-04-22 | 2021-04-16 | 浙江固特气动科技股份有限公司 | Limestone conveying system |
| CN110092205A (en) * | 2019-04-22 | 2019-08-06 | 浙江固特气动科技股份有限公司 | A kind of lime stone handling system |
| CN110814692A (en) * | 2019-11-29 | 2020-02-21 | 西安航天动力测控技术研究所 | Multi-degree-of-freedom docking tool for engine separation test and assembling method |
| CN111043397A (en) * | 2019-12-30 | 2020-04-21 | 云南驰宏锌锗股份有限公司 | Device convenient to heavy pipeline of tunnel installation in pit |
| CN111299952A (en) * | 2020-03-10 | 2020-06-19 | 沧州渤海石化工程有限公司 | Petroleum pipeline group is to welding set |
| CN112207503A (en) * | 2020-09-07 | 2021-01-12 | 宜昌江峡船用机械有限责任公司 | Accurate adjustment butt joint device and method for large pressure container |
| CN114734126A (en) * | 2021-01-08 | 2022-07-12 | 中国石油天然气集团有限公司 | Welding device |
| CN112935697A (en) * | 2021-04-09 | 2021-06-11 | 郑州越达科技装备有限公司 | Straight seam welding and group welding equipment for large-diameter cylinder |
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| CN113212525A (en) * | 2021-06-04 | 2021-08-06 | 四川航天长征装备制造有限公司 | Multifunctional butt-joint rack vehicle |
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