CN107825059B - Pipeline welds arc cushion device - Google Patents
Pipeline welds arc cushion device Download PDFInfo
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- CN107825059B CN107825059B CN201711062716.4A CN201711062716A CN107825059B CN 107825059 B CN107825059 B CN 107825059B CN 201711062716 A CN201711062716 A CN 201711062716A CN 107825059 B CN107825059 B CN 107825059B
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- cylinder
- guide rail
- steel ball
- rail pole
- push
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Classifications
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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
- 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
- B23K37/0531—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 internal pipe alignment clamps
-
- 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)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A kind of pipeline welding arc cushion device.Main purpose be to provide it is a kind of can be used for improving the cushion device of welding quality in pipeline construction.It is characterized by: the device includes that head support pushes and pulls positioning element to mouthpiece, head liner pushing guide part part, intermediate cylinder bar connecting component and tail portion；The head support has 6 groups to mouthpiece, and every group includes 1 fixed jackscrew, 1 abrasion-proof steel ball, several roll adjustment gaskets, 1 steel ball cylinder and 1 steel ball seat；The head liner pushing guide part part includes rack tube, slip ring, compressed spring, fixed ring, guide rail pole, sliding rack, arc liner, caging bolt and nut；The intermediate cylinder bar connecting component includes connecting cylinder, cylinder box cupling, connecting rod and bar box cupling, and the intermediate cylinder bar interconnecting piece is used for attachment device head and tail portion, and transmits the rotation or push pull maneuver of tail portion；The tail portion push-and-pull positioning element includes push-pull handle and Clip Reed.
Description
Technical field
It is specifically a kind of used for improving in pipeline construction the present invention relates to a kind of welding backing device
The arc cushion device of welding quality.
Background technique
In pipeline construction, in addition to can into people ultra-large-diameterpipeline pipeline other than, due to the limitation of conventional pipeline bore, people
Member not can enter to be welded inside pipeline, can only carry out single-sided welding outside, inner wall of the pipe weld seam is thus be easy to cause to go out
The defects of existing lack of penetration, overlap, influence weldquality.
Welding backing technology is when carrying out single-sided welding, to attach a kind of ceramic or copper liner in back of weld, is blocked
Welding groove, to constrain welding pool form, the good weldquality of formation avoids weld seam from lack of penetration, overlap etc. occur and lacks
It falls into.Welding backing technology due to welding after need to remove or dispose liner, applied in pipeline welding
Difficulty is larger, needs dedicated unit.
Currently, domestic had been introduced by the external pipeline welding line-up clamp and the relevant technologies with liner component, it can
To realize the welding backing technique of large diameter pipeline.But structure is complicated for this kind of line-up clamp, volume is larger, may be only available for big
Caliber pipe can not be applied to middle small-bore pipeline.In recent years, domestic also to develop several liner dresses for pipeline welding
It sets.But these cushion devices have some shortcomings, some can only also apply large diameter pipeline, some pad removal fiber crops
Tired, what is had cannot change with pipe diameter and arbitrarily adjust.
Summary of the invention
In order to solve the technical problems mentioned in the background art, the present invention provides a kind of pipeline welding arc liner dress
It sets, this kind of liner cushion device, is suitable for middle small-bore pipeline, pad removal is convenient, and can change and side with pipe diameter
Just it adjusts.
The technical scheme is that this kind of pipeline welds arc cushion device, including head support to mouthpiece, head
It pads pushing guide part part, intermediate cylinder bar connecting component and tail portion and pushes and pulls positioning element, it is characterised in that:
The head support has 6 groups to mouthpiece, and every group includes 1 fixed jackscrew, 1 abrasion-proof steel ball, several roll adjustments
Gasket, 1 steel ball cylinder and 1 steel ball seat；Arc liner in the head liner pushing guide part part each side has 3 groups
To mouthpiece, every 3 groups, in 120 degree of circumference layouts, are used to support device head, and realize the welding of two side ducts for head support
Groove centering；The fixed jackscrew is interior hexagonal holding screw, is used for stationary balls cylinder and steel ball seat；The abrasion-proof steel ball is axis
Steel material steel ball is held, rotated for device and mitigates friction when extracting out；The roll adjustment gasket is small thin discs, by increasing and decreasing roll adjustment
The spacing of gasket quantity adjustable abrasion-proof steel ball and inner wall of the pipe, to adapt to pipe diameter variation；The steel ball cylinder is copper conjunction
The small cylinder of golden material, interior bore ends have small protrusion, to prevent abrasion-proof steel ball from falling off, steel ball cylinder side face drilling threaded hole, for pacifying
Fill fixed jackscrew；The steel ball seat is small column, is welded on rack tube, connect with steel ball cylinder inner hole；
The head liner pushing guide part part include rack tube, slip ring, compressed spring, fixed ring, guide rail pole, sliding rack,
Arc liner, caging bolt and nut, the head liner pushing guide part part are used to weld arc liner ejection closure
At groove, or the arc is padded and is withdrawn；
The rack tube is formed by 2 cylinders and 1 cylindrical body coaxial welding, wherein cylindrical body axially and radially respectively adds
One flat rectangular opening of work, plays sliding rail guiding role, and axial rectangular opening is used to penetrate the eccentric rectangular section of guide rail pole, radial rectangular opening
For penetrating the flat plate section of sliding rack；1 is welded compared with short cylinder, for installing 3 groups of head supports to oral area in the left side of cylindrical body
Part；1 long cylinder is welded on the right side of cylindrical body, and drilling on the right side of cylinder installs fixed ring by bolt, and cylinder right end opens two
Groove, and connecting cylinder male cooperation, and cylinder right end outer wall thicken threaded, cooperate with cylinder coupling inner thread；
The slip ring is Copper alloy material, and inner hole is oriented to for guide rail pole cylindrical section, can be in the long cylinder of rack tube
In slide, boss be used for position on the right side of compressed spring；The fixed ring is Copper alloy material, and side thread mill drilling passes through
Bolt is fixed in rack tube, and fixed ring inner hole is oriented to for guide rail pole cylindrical section, and boss is used to position the compressed spring in left side；
The compressed spring pushes guide rail pole to be moved to the left by slip ring, is allowed to move up to press sliding rack；It is described to lead
Rail bar is strip guide rod, and right section of guide rail pole is cylinder, is through in slip ring and fixed ring, and right end processes screw thread, is connect with bar
Bind round screw-internal thread fit；Left section of guide rail pole is deflection rectangle, is through in the rectangular opening of rack tube and sliding rack, for pushing sliding rack
Stretch out and retract movement；Guide rail pole left end drilling, for installing caging bolt, to prevent guide rail pole from moving to right excessive fall off；
The sliding rack is Copper alloy material, is welded by a circular arc body and a tablet, for installing arc
It pads and realizes and radially slide.The circular arc body two sides thread mill drilling of sliding rack passes through the fixed arc liner of screw；Sliding rack
Tablet processes rectangular opening, for radially sliding across guide rail pole to realize；
The arc liner is circular arc body, and two sides machining small is fixed by screws on sliding rack；Arc liner material
For Copper alloy material or copper band ceramic coated；
The caging bolt and nut are mounted on guide rail pole left end, for preventing guide rail pole from moving to right excessive fall off；
The intermediate cylinder bar connecting component includes connecting cylinder, cylinder box cupling, connecting rod and bar box cupling, the intermediate cylinder bar connection
Portion is used for attachment device head and tail portion, and transmits the rotation or push pull maneuver of tail portion；
Wherein, the connecting cylinder is elongated cylinder, and cylinder left end thickeies and there are two protrusion, matches with rack tube right end groove
It closes, is realized by cylinder box cupling and connect with rack tube；The cylinder box cupling is tapped short cylinder, is used for connecting bracket cylinder and company
Connect cylinder；The connecting rod is elongate rod, and both ends process screw thread, and left end is threaded through bar box cupling and connect with guide rail pole；Right end screw thread
It is connect with the threaded hole of push-pull handle；The bar box cupling is tapped short cylinder, for connecting guide rail pole and connecting rod；
The tail portion push-and-pull positioning element includes push-pull handle and Clip Reed；The push-pull handle is that two cylinders are welded into cross
Shape, the handle compared with long cylinder as push-and-pull operation；Compared with short cylindrical axial direction thread mill drilling, it is connected in connecting rod；Compared with short cylindrical
Side processes 4 minor thread holes, is used for fixing card reed；The Clip Reed is the sliver of spring steel material；Clip Reed right end
Drilling, is fixed on push-pull handle by stove bolt；Clip Reed left end is the bent laterally opened, can be stuck in the end of connecting cylinder
At face, prevent push-pull handle from moving to left under compressed spring effect.
The invention has the following beneficial effects: firstly, this kind of apparatus structure is compact, suitable for middle small-bore pipeline；Secondly,
This kind of device can change with pipe diameter and facilitate adjustment；Again, the present apparatus only needs to push and pull when in use rotation, operation letter
Just；In addition, the arc liner in the present apparatus can be used for multiple times, waste is avoided.
Detailed description of the invention:
Fig. 1 is cutting main view when device head liner blocks；
Fig. 2 is commissure cutting left view when device head liner blocks；
Fig. 3 is left view when device head liner blocks；
Fig. 4 is cutting main view when device tail portion Clip Reed is retracted；
Fig. 5 is top view when device tail portion Clip Reed is retracted；
Fig. 6 is cutting main view when device head liner is retracted；
Fig. 7 is commissure cutting left view when device head liner is retracted；
Fig. 8 is left view when device head liner is retracted；
Cutting main view when Fig. 9 is device tail portion circlip card；
Top view when Figure 10 is device tail portion circlip card；
Figure 11 is the cutting main view and top view of rack tube；
Figure 12 is the main view and top view of guide rail pole；
Figure 13 is the cutting main view and left view of sliding rack；
Figure 14 is the cutting main view of arc liner；
Figure 15 is the cutting main view of slip ring；
Figure 16 is the cutting main view of fixed ring；
Figure 17 is the cutting main view and left view on connecting cylinder head；
Figure 18 is the cutting main view of cylinder box cupling；
Figure 19 is the main view and top view of Clip Reed；
Figure 20 is the main view of push-pull handle.
In figure: 1, pipeline to be welded；2, rack tube；3, slip ring；4, compressed spring；5, fixed ring；6, cylinder box cupling；7, even
Connect cylinder；8, connecting rod；9, bar box cupling；10, guide rail pole；11, sliding rack；12, arc pads；13, fixed jackscrew；14, abrasion-resistant stee
Ball；15, roll adjustment gasket；16, steel ball cylinder；17, steel ball seat；18, caging bolt and nut；19, Clip Reed；20, push-pull handle.
Specific embodiment:
The present invention will be further explained below with reference to the attached drawings:
As shown in Fig. 1 to Figure 20, the present invention develops used liner cushion device when a kind of pipeline welding, is suitable for
Middle small-bore pipeline, pad removal is convenient, and can change with pipe diameter and facilitate adjustment.
The technical solution adopted by the present invention to solve the technical problems is: device composition include head support to mouthpiece,
Head liner pushing guide part part, intermediate cylinder bar connecting component, tail portion push and pull positioning element.
The head support has 6 groups to mouthpiece, and every group includes 1 fixed jackscrew, 1 abrasion-proof steel ball, several roll adjustment pads
Piece, 1 steel ball cylinder, 1 steel ball seat.Each side there are 3 groups of head supports to mouthpiece, every 3 composition in device arc liner
120 ° of circumference layouts, are used to support device head, and realize the welding groove centering of two side ducts.
The fixed jackscrew is interior hexagonal holding screw, is used for stationary balls cylinder and steel ball seat.
The abrasion-proof steel ball is On The Quality of Bearing Steels steel ball, rotates for device and mitigates friction when extracting out.
The roll adjustment gasket is small thin discs, passes through the adjustable abrasion-proof steel ball of increase and decrease roll adjustment gasket quantity and inner wall of the pipe
Spacing, with adapt to pipe diameter variation.
The steel ball cylinder is the small cylinder of Copper alloy material, and interior bore ends have small protrusion, to prevent abrasion-proof steel ball from falling off, steel
Ball cylinder side face drilling threaded hole, for installing fixed jackscrew.
The steel ball seat is small column, is welded on rack tube, connect with steel ball cylinder inner hole.
The head liner pushing guide part part include rack tube, slip ring, compressed spring, fixed ring, guide rail pole, sliding rack,
Arc liner, caging bolt and nut block at welding groove for that will pad ejection, or liner are withdrawn.
The rack tube is formed by 2 cylinders and 1 cylindrical body coaxial welding.Cylindrical body axially and radially respectively processes one
Flat rectangular opening plays sliding rail guiding role, and axial rectangular opening is used to penetrate the eccentric rectangular section of guide rail pole, and radial rectangular opening is for wearing
Enter the flat plate section of sliding rack.1 short cylinder is welded in the left side of cylindrical body, for installing 3 groups of head supports to mouthpiece.Cylindrical body
Right side weld 1 long cylinder, drilling on the right side of cylinder installs fixed ring by bolt, and cylinder right end opens two grooves, and even
Connect cylinder male cooperation, and the thickening of cylinder right end outer wall is threaded, cooperates with cylinder coupling inner thread.
The slip ring is Copper alloy material, and inner hole is oriented to for guide rail pole cylindrical section, can be in the long cylinder of rack tube
In slide, boss be used for position on the right side of compressed spring.
The fixed ring is Copper alloy material, and side thread mill drilling is bolted in rack tube, in fixed ring
Hole is oriented to for guide rail pole cylindrical section, and boss is used to position the compressed spring in left side.
The compressed spring pushes guide rail pole to be moved to the left by slip ring, is allowed to move up to press sliding rack.
The guide rail pole is strip guide rod, and right section of guide rail pole is cylinder, is through in slip ring and fixed ring, right end adds
Work screw thread cooperates with bar coupling inner thread；Left section of guide rail pole is deflection rectangle, is through in the rectangular opening of rack tube and sliding rack,
For pushing sliding rack to stretch out and retract movement；Guide rail pole left end drilling, for installing caging bolt, to prevent guide rail pole from moving to right
It is excessive to fall off.
The sliding rack is Copper alloy material, is welded by a circular arc body and a tablet, for installing arc
It pads and realizes and radially slide.The circular arc body two sides thread mill drilling of sliding rack passes through the fixed arc liner of screw；Sliding rack
Tablet processes rectangular opening, for radially sliding across guide rail pole to realize.
The arc liner is circular arc body, and two sides machining small is fixed by screws on sliding rack.Arc liner material
For Copper alloy material or copper band ceramic coated, can be used for multiple times.
The caging bolt and nut are mounted on guide rail pole left end, for preventing guide rail pole from moving to right excessive fall off.
The intermediate cylinder bar connecting component includes connecting cylinder, cylinder box cupling, connecting rod, bar box cupling, is used for attachment device head
And tail portion, and transmit the rotation or push pull maneuver of tail portion.
The connecting cylinder is elongated cylinder, and cylinder left end thickeies and there are two protrusions, cooperates with rack tube right end groove, leads to
The realization of cylinder box cupling is crossed to connect with rack tube.
The cylinder box cupling is tapped short cylinder, is used for connecting bracket cylinder and connecting cylinder.
The connecting rod is elongate rod, and both ends process screw thread, and left end is threaded through bar box cupling and connect with guide rail pole；Right end spiral shell
The connection of the threaded hole of line and push-pull handle.
The bar box cupling is tapped short cylinder, for connecting guide rail pole and connecting rod.
The tail portion push-and-pull positioning element includes push-pull handle and Clip Reed.
The push-pull handle is that two cylinders weld across, the handle compared with long cylinder as push-and-pull operation；Compared with short cylindrical
Axial thread mill drilling, is connected in connecting rod；4 minor thread holes are processed compared with short cylindrical side, are used for fixing card reed.
The Clip Reed is the sliver of spring steel material；The drilling of Clip Reed right end, is fixed on push-pull handle by stove bolt
On；Clip Reed left end is the bent laterally opened, can be stuck in the endface of connecting cylinder, prevents push-pull handle from making in compressed spring
It is moved to left under.
The application method of the present apparatus is as follows:
Device before use, if the internal diameter of the pipeline that the inner diameter size of pre-welding pipeline was used with device last time has differences,
When internal diameter of the pipeline variation is smaller, it is only necessary to increase and decrease roll adjustment gasket quantity and select corresponding arc liner, if internal diameter of the pipeline
When changing greatly, it is also necessary to steel ball cylinder and sliding rack are replaced, to adapt to internal diameter of the pipeline variation.
The first step, the push-pull handle of pull unit tail portion, Clip Reed open the stuck end face in connecting cylinder, and guide rail pole, which drives, to be slided
Moving frame is retracted, and collide with arc liner when being inserted into pipeline to avoid device；Device is inserted into from single pipe one end of pre-welding, dress
It sets head to be located at welding groove, tail end exposes except pipeline.
Pre-welding pipeline is docked on mounted pipeline by second step, by the connecting cylinder of mobile device tail portion come
Control device head position guarantees two tube grooves to neutrality mouthpiece using six groups of heads support on head position；
After adjusting pipeline welding groove spacing, fixed single pipe.
Third step, the Clip Reed of screwdown gear tail portion, is retracted into Clip Reed in connecting cylinder, the compressed spring on device head
It springs back to the left, guide rail pole pushes sliding rack to be moved outwards, and arc liner press is blocked pipeline welding groove；To the slope of closure
Mouth carries out weld job.
4th step, after the groove that this section of pipeline blocks welds, the push-pull handle of pull unit tail portion, guide rail pole drives sliding rack
It retracts；Lower section of unwelded groove of arc pad alignment is unclamped push-pull handle, arc liner by the connecting cylinder of rotating device tail portion
Press blocks welding groove；Weld job is carried out to the groove of closure.
5th step, after pipeline one enclose groove welding after the completion of, the push-pull handle of pull unit tail portion, Clip Reed open it is stuck
Connecting cylinder end face, guide rail pole drive sliding rack to retract；Device is extracted out from the outer end of pipeline.
Claims (1)
1. a kind of pipeline welds arc cushion device, including head support to mouthpiece, head liner pushing guide part part, intermediate cylinder bar
Connecting component and tail portion push and pull positioning element, it is characterised in that:
Head support has 6 groups to mouthpiece, every group include 1 fixed jackscrew, 1 abrasion-proof steel ball, several roll adjustment gaskets,
1 steel ball cylinder and 1 steel ball seat；Arc liner in the head liner pushing guide part part each side has 3 groups of heads
To mouthpiece, every 3 groups, in 120 degree of circumference layouts, are used to support device head, and realize the welding groove of two side ducts for support
Centering；The fixed jackscrew is interior hexagonal holding screw, is used for stationary balls cylinder and steel ball seat；The abrasion-proof steel ball is bearing steel
Material steel ball mitigates friction when rotating and extract out for device；The roll adjustment gasket is small thin discs, by increasing and decreasing roll adjustment gasket
The spacing of quantity adjustable abrasion-proof steel ball and inner wall of the pipe, to adapt to pipe diameter variation；The steel ball cylinder is copper alloy material
The small cylinder of matter, interior bore ends have small protrusion, and to prevent abrasion-proof steel ball from falling off, steel ball cylinder side face drilling threaded hole is solid for installing
Determine jackscrew；The steel ball seat is small column, is welded on rack tube, connect with steel ball cylinder inner hole；
The head liner pushing guide part part includes rack tube, slip ring, compressed spring, fixed ring, guide rail pole, sliding rack, arc
Liner, caging bolt and nut, the head liner pushing guide part part are used to block arc liner ejection in welding groove
Place, or the arc is padded and is withdrawn；
The rack tube is formed by 2 cylinders and 1 cylindrical body coaxial welding, wherein cylindrical body axially and radially respectively processes one
A flat rectangular opening plays sliding rail guiding role, and axial rectangular opening is used to penetrate the eccentric rectangular section of guide rail pole, and radial rectangular opening is used for
Penetrate the flat plate section of sliding rack；1 is welded compared with short cylinder, for installing 3 groups of head supports to mouthpiece in the left side of cylindrical body；Circle
1 long cylinder is welded on the right side of cylinder, and drilling on the right side of cylinder installs fixed ring by bolt, and cylinder right end opens two grooves,
With connecting cylinder male cooperation, and cylinder right end outer wall thicken it is threaded, with cylinder coupling inner thread cooperate；
The slip ring is Copper alloy material, and inner hole is oriented to for guide rail pole cylindrical section, can slide in the long cylinder of rack tube
Dynamic, boss is used to position the compressed spring on right side；The fixed ring is Copper alloy material, and side thread mill drilling passes through bolt
It is fixed in rack tube, fixed ring inner hole is oriented to for guide rail pole cylindrical section, and boss is used to position the compressed spring in left side；
The compressed spring pushes guide rail pole to be moved to the left by slip ring, is allowed to move up to press sliding rack；The guide rail pole
For strip guide rod, right section of guide rail pole is cylinder, is through in slip ring and fixed ring, and right end is processed in screw thread, with bar box cupling
It is threadedly engaged；Left section of guide rail pole is deflection rectangle, is through in the rectangular opening of rack tube and sliding rack, for pushing sliding rack to stretch out
With retract movement；Guide rail pole left end drilling, for installing caging bolt, to prevent guide rail pole from moving to right excessive fall off；
The sliding rack is Copper alloy material, is welded by a circular arc body and a tablet, for installing arc liner
And it realizes and radially slides；The circular arc body two sides thread mill drilling of sliding rack passes through the fixed arc liner of screw；The small of sliding rack is put down
Plate processes rectangular opening, for radially sliding across guide rail pole to realize；
The arc liner is circular arc body, and two sides machining small is fixed by screws on sliding rack；Arc liner material is copper
Alloy material or copper band ceramic coated；
The caging bolt and nut are mounted on guide rail pole left end, for preventing guide rail pole from moving to right excessive fall off；
The intermediate cylinder bar connecting component includes connecting cylinder, cylinder box cupling, connecting rod and bar box cupling, the intermediate cylinder bar connecting component
For attachment device head and tail portion, and transmit the rotation or push pull maneuver of tail portion；
Wherein, the connecting cylinder is elongated cylinder, and cylinder left end thickeies and there are two protrusions, is cooperated with rack tube right end groove,
It is realized by cylinder box cupling and is connect with rack tube；The cylinder box cupling be tapped short cylinder, for connecting bracket cylinder with connect
Cylinder；The connecting rod is elongate rod, and both ends process screw thread, and left end is threaded through bar box cupling and connect with guide rail pole；Right end screw thread with
The threaded hole of push-pull handle connects；The bar box cupling is tapped short cylinder, for connecting guide rail pole and connecting rod；
The tail portion push-and-pull positioning element includes push-pull handle and Clip Reed；The push-pull handle is that two cylinders weld across,
Handle compared with long cylinder as push-and-pull operation；Compared with short cylindrical axial direction thread mill drilling, it is connected in connecting rod；Compared with short cylindrical side
4 minor thread holes are processed, fixing card reed is used for；The Clip Reed is the sliver of spring steel material；The drilling of Clip Reed right end,
It is fixed on push-pull handle by stove bolt；Clip Reed left end is the bent laterally opened, can be stuck in the endface of connecting cylinder,
Prevent push-pull handle from moving to left under compressed spring effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711062716.4A CN107825059B (en) | 2017-11-02 | 2017-11-02 | Pipeline welds arc cushion device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711062716.4A CN107825059B (en) | 2017-11-02 | 2017-11-02 | Pipeline welds arc cushion device |
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| Publication Number | Publication Date |
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| CN107825059A CN107825059A (en) | 2018-03-23 |
| CN107825059B true CN107825059B (en) | 2019-07-02 |
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| CN1569387A (en) * | 2003-07-23 | 2005-01-26 | 中国石油天然气管道局 | Inside shaping adjusting device for pipe |
| CN2818077Y (en) * | 2005-09-01 | 2006-09-20 | 中国石油天然气管道局 | Pneumatic pipeline internal counteropening device with copper pad |
| CN101480770A (en) * | 2008-04-01 | 2009-07-15 | 冯岩 | Hydraulic pipeline internal butt-joint device |
| CN204262665U (en) * | 2014-07-18 | 2015-04-15 | 洛阳德平科技股份有限公司 | A kind of internal clamp head for multiple tube construction |
| CN105736895A (en) * | 2016-05-12 | 2016-07-06 | 青岛理工大学 | Deviation-adjustable type submarine pipeline quick repairing and connecting device |
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|---|---|
| CN107825059A (en) | 2018-03-23 |
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