CN105965131A - In-pipe welding device and method for butt joint pipe - Google Patents
In-pipe welding device and method for butt joint pipe Download PDFInfo
- Publication number
- CN105965131A CN105965131A CN201610562164.2A CN201610562164A CN105965131A CN 105965131 A CN105965131 A CN 105965131A CN 201610562164 A CN201610562164 A CN 201610562164A CN 105965131 A CN105965131 A CN 105965131A
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- China
- Prior art keywords
- pipe
- butt tube
- welding
- electrode
- conducting rod
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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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
-
- 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
Abstract
The invention provides an in-pipe welding device and method for a butt joint pipe. The in-pipe welding device for the butt joint pipe comprises, at least, a welding tool rod, a ceramic jet nozzle arranged outside the welding tool rod in a sleeving mode and a positioning ring, wherein the welding tool rod is an electric conductor provided with an axially through first air inlet channel, the spout position, corresponding to the ceramic jet nozzle, of the welding tool rod is detachably connected with an electrode, the electrode extends to the outside of the ceramic jet nozzle in the radial direction and can synchronously rotate with the welding tool rod, an air guide through hole communicated with the a spout is formed in the side wall of the first air inlet channel, and an outer annular face of the positioning ring can be in clearance fit with the inner surface of the butt joint pipe. The in-pipe welding device for the butt joint pipe can be inserted into the butt joint pipe to be welded for in-pipe welding and can ensure that the formed surface of an in-pipe weld pass after welding is flat, smooth and free of defects. By the adoption of the in-pipe welding method for the butt joint pipe, double-faced welding of pipes with the pipe inner diameters greater than or equal to 15 mm and the length smaller than or equal to 3000 mm for butt joint can be achieved.
Description
Technical field
The present invention relates to welding technology field, particularly to the welding apparatus in pipe of a kind of butt tube and a kind of butt tube
Welding method.
Background technology
Normally used small-bore pipe docking welding apparatus in pipe is endoporus welding machine, and inner hole welding of rapid cooling can become by single face welding and double face
Type.But the welding system of endoporus welding machine cannot be introduced into bore 15 millimeters, welds in the pipe that pipe range is 3000 millimeters
Operation.And small-bore, long tube, the welding technique of docking complete penetraction and fusion in welding structure that generally use are: padded list
The welding technique such as face weldering, one side manual argon arc welding, single face welding and double face shaping, but, these welding techniques
Can make welding bead molded surface in pipe have liner or formed depression, protruding, drip the defects such as tumor, lack of penetration and undercut, these
In defect not only gives pipe, medium fluid forms resistance, affects liquid flowing, and owing to medium is at inside pipe wall fault location
Delay can form local corrosion, and the most vertical (falling film type) heat transmission equipment, these defects directly affect heat exchanger tube
The formation of interior liquid film, or destroy the integrity of liquid film, so that heat exchanger tube inner surface loses liquid film protection, cause anoxia
And by managing the corrosion failure of interior medium, directly affect the service life of equipment.
Summary of the invention
It is an object of the present invention to provide a kind of can enter small-bore pipe in the pipe of butt tube that is subjected to
Interior welder.
It is a further object to provide the welding method of a kind of butt tube, this welding method uses above-mentioned butt tube
Welding apparatus in pipe.
For reaching above-mentioned purpose, the invention provides the welding apparatus in pipe of a kind of butt tube, it at least includes: electrode
Adjusting part, described electrode regulating assembly includes soldering set bar, is set in the ceramic nozzle outside described soldering set bar, described
The sidewall of ceramic nozzle is provided with spout, described soldering set bar be have axially through the electric conductor of the first inlet channel,
The connection that described soldering set pole pair answers described nozzle can be removably mounted has electrode, described electrode to radially extend to described pottery spray
The outside of mouth, and described electrode can with described soldering set bar synchronous rotary, the sidewall of described first inlet channel be provided with
The inducing QI through hole that described spout is connected；Positioning component, described positioning component includes locating ring, and described locating ring is sheathed
In the outside of described soldering set bar, the outer ring surface of described locating ring can coordinate with the internal surface gaps of described butt tube.
The welding apparatus in pipe of butt tube as above, wherein, the welding apparatus in pipe of described butt tube also includes:
Be conductively connected assembly, described in be conductively connected assembly and include conducting rod and be set in the insulation sleeve outside described conducting rod, institute
The one end stating conducting rod is connected with described soldering set bar, and described soldering set bar can be described fixed with described conducting rod synchronous axial system
The end face of position ring is connected on the end face of described ceramic nozzle, and the other end of described locating ring is connected to described conduction
On the end face of one end of bar, described conducting rod be provided with axially through the second inlet channel, described second inlet channel with
Described first inlet channel is connected and forms protection gas passage.
The welding apparatus in pipe of butt tube as above, wherein, described conducting rod is that multiple metal tube is connected by screw thread
Connect and form.
The welding apparatus in pipe of butt tube as above, wherein, the other end of described conducting rod is provided with outside connecting
The joint of portion's source of the gas.
The welding apparatus in pipe of butt tube as above, wherein, described positioning component also includes locating cover, described fixed
Position lid is set in the outside of described insulation sleeve and connects with described insulation sleeve, and the outer ring surface of described locating cover can be right with described
The internal face matched in clearance of adapter, one end of described locating cover the most described soldering set bar outwards turns down formation can be right with described
The rib of the end face snap-fit engagement of adapter.
The welding apparatus in pipe of butt tube as above, wherein, the welding apparatus in pipe of described butt tube also includes:
Rotating adjusting part, described rotation adjusting part includes the expansion set being set in outside described conducting rod and is set in described swollen
Regulation stationary fixture outside Tao, described expansion set is positioned at the side of described conducting rod the most described soldering set bar, by rotating
Described regulation stationary fixture drives described expansion set synchronous axial system, and described expansion set rotates and drives described conducting rod synchronous axial system.
The welding apparatus in pipe of butt tube as above, wherein, along the moving direction of described electrode, described electrode
The angle formed between the interface of central axis and described butt tube is right angle or acute angle.
The welding apparatus in pipe of butt tube as above, wherein, the length of described butt tube is less than or equal to 3m,
The internal diameter of described butt tube is more than or equal to 15mm.
Present invention also offers the welding method of a kind of butt tube, use the welding apparatus in pipe of above-mentioned butt tube, described
In pipe, welding method comprises the following steps:
Carry out butt tube to be welded welding pre-treatment；
The welding apparatus in pipe of described butt tube is inserted in described butt tube to be welded, and makes electrode just to described to be welded right
The interface of adapter；
Described butt tube to be welded use the outer fixture of pipe fix；
External air source is connected with described soldering set bar, and described soldering set bar is electrically connected with welding machine；
Open external air source, in soldering set bar, be passed through protection gas, until the periphery of described electrode is full of described protection gas；
Material according to described butt tube, wall thickness, adjust the welding condition of described welding machine；
Opening described welding machine, rotate described soldering set bar, described electrode has rotated along described interface synchronization with described soldering set bar
Become the welding of not packed column GC in pipe；
Unload described pipe extenal fixation fixture, rotate described butt tube, complete to manage the weldering of outer packed column GC by described welding machine
Connect；
Close described welding machine and described external air source, the welding apparatus in pipe of described butt tube is pulled out in described butt tube
Go out.
The welding method of butt tube as above, wherein, described welding pre-treatment specifically includes following steps:
Machine cut equipment is processed end face and the groove of described butt tube to be welded；
Remove the burr of pipe end of described butt tube to be welded, oil stain, and clean with acetone.
Compared with prior art, advantages of the present invention is as follows:
The welding apparatus in pipe of the butt tube that the present invention provides, it is possible to insert in butt tube to be welded, and by driving soldering set
Bar rotational band moving electrode welds in moving into line pipe along the interface synchronization of butt tube to be welded, has both efficiently solved bore
15 millimeters and more than, within length 3000 millimeters, pipe docking cannot realize welding by both sides, uses existing welding procedure to weld
Depression that road inner surface occurs, projection, drip tumor, lack of penetration, undercut etc. and affect liquid in pipe and flow or liquid film forming
Defect, in turn ensure that in postwelding pipe that welding bead molded surface is smooth, smooth, zero defect, and pipe butt weld can be made to penetrate
The first-time qualification rate of line Non-Destructive Testing is more than 99%, thus the butt welding of heat exchanger tube in manufacturing for heat transmission equipment, especially
It is that the butt welding to in-service vertical (falling film type) heat transmission equipment heat exchanger tube provides guarantee reliably；
The welding method of the butt tube that the present invention provides, simple to operate, use the welding apparatus in pipe of above-mentioned butt tube,
Achieve bore 15 millimeters and more than, the welding by both sides of pipe docking within length 3000 millimeters, and enough ensure that pipe is right
Joint inner surface molding is smooth, smooth.
Accompanying drawing explanation
The following drawings is only intended to, in schematically illustrating the present invention and explaining, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the welding apparatus in pipe of the butt tube according to one embodiment of the invention offer；
Fig. 2 be the butt tube shown in Fig. 1 welding apparatus in pipe in the structural representation of electrode regulating assembly；
Fig. 3 be the butt tube shown in Fig. 1 welding apparatus in pipe in be conductively connected the structural representation of assembly；
Fig. 4 be the butt tube shown in Fig. 1 welding apparatus in pipe in the structural representation of locating ring；
Fig. 5 be the butt tube shown in Fig. 1 welding apparatus in pipe in the structural representation of locating cover.
Drawing reference numeral illustrates:
1-soldering set bar；11-the first inlet channel；2-ceramic nozzle；21-spout；3-electrode；4-locating ring；5-conducts electricity
Bar；51-the second inlet channel；52-joint；6-insulation sleeve；7-locating cover；71-rib；8-expansion set；9-regulation is solid
Clamp has；10-butt tube.
Detailed description of the invention
In order to technical scheme, purpose and effect are had clearer understanding, in conjunction with accompanying drawing, the present invention is described
Detailed description of the invention.
As it is shown in figure 1, the invention provides the welding apparatus in pipe of a kind of butt tube, it at least includes: electrode regulating
Assembly and positioning component, wherein, as in figure 2 it is shown, electrode regulating assembly includes soldering set bar 1, is set in soldering set bar 1
Outside ceramic nozzle 2, the sidewall of ceramic nozzle 2 is provided with spout 21, soldering set bar 1 for have axially through the
The electric conductor of one inlet channel 11, the connection that can be removably mounted at the corresponding spout 21 of soldering set bar 1 has electrode 3, electrode 3 edge
Extend radially to the outside of ceramic nozzle 2, i.e. electrode 3 extending radially through soldering set bar 1 and passing spout along soldering set bar 1
21 outsides extending to ceramic nozzle 2, electrode 3 can be with soldering set bar 1 synchronous rotary, i.e. by rotating soldering set bar 1
Rotating to complete to manage interior welding along the interface of butt tube 10 with moving electrode 3, the sidewall of the first inlet channel 11 is provided with
The inducing QI through hole (not shown) being connected with spout 21, so that protective gas can be via the first inlet channel
11, inducing QI through hole enters spout 21, owing to ceramic nozzle 2 has good insulating, the advantage such as high temperature resistant so that protect
Protecting gas and can be full of the periphery of electrode 3 under the restriction effect of spout 21, to avoid in welding process, air is dirty
Dye welding bead, thus in postwelding pipe has been effectively ensured, welding bead molded surface is smooth, smooth, zero defect；Such as Fig. 1 and Fig. 4
Shown in, positioning component includes that locating ring 4, locating ring 4 are insulator, and locating ring 4 is set in the outside of soldering set bar 1,
The outer ring surface of locating ring 4 can coordinate with the internal surface gaps of butt tube 10, to avoid soldering set bar 1 at butt tube 10
Inside teetertotter and affect welding quality.
Wherein, the length of butt tube 10 is less than or equal to 3m, and the internal diameter of butt tube is more than or equal to 15mm,
There is between outer surface and the inner surface of butt tube 10 of nozzle 2 gap of 3mm～5mm.
When carrying out managing interior welding, first, the welding apparatus in pipe of butt tube is arranged in butt tube 10 to be welded,
Concretely comprise the following steps: first electrode regulating assembly is inserted in butt tube 10 to be welded, and make electrode 3 just to butt tube 10
Interface, then choose the locating ring 4 of outer ring surface and butt tube 10 internal diameter matched in clearance to be welded, it is preferred that choose
There is about 1mm gap, then by locating ring between outer ring surface and the inner surface of butt tube to be welded 10 of locating ring 4
4 outsides being set in soldering set bar 1, electrically connect welding machine with soldering set bar 1 afterwards, external air source and the first inlet channel
11 seal connection；Secondly, opening external air source and be filled with protection gas in the first inlet channel 11, protection gas leads to successively
Cross the first inlet channel 11, inducing QI through hole, enter spout 21 and under the restriction effect of spout 21, be full of electrode 3
Periphery, and in welding process, continue to be filled with protection gas in the first inlet channel 11, utilize protection air stripping high
Weldquality, reduces weld seam heat effect bandwidth, it is to avoid material aoxidizes；Finally, open welding machine, rotate weldering simultaneously
Tool bar 1, makes soldering set bar 1 band moving electrode 3 rotate along the interface synchronization of butt tube 10 and manages interior welding.
It should be noted that the action rotating soldering set bar 1 can use motor to drive, it is also possible to drive manually；
When employing rotates manually, soldering set bar 1 can be extended butt tube 10 to be welded, and prolonging at soldering set bar 1
Stretch the sheathed insulation driving handle being easy to hand-held rotation of end, drive soldering set bar 1 to synchronize to turn by rotating insulation driving handle
Dynamic；When using motor to drive, only the output shaft of motor need to be connected with soldering set bar 1.
The welding apparatus in pipe of the butt tube that the present invention provides, it is possible to insert in butt tube 10 to be welded, and by driving
Soldering set bar 1 rotational band moving electrode 3 welds in moving into line pipe along the interface synchronization of butt tube 10 to be welded, both efficient solutions
Determined bore 15 millimeters and more than, within length 3000 millimeters pipe docking cannot realize welding by both sides, use existing
Welding procedure welding bead inner surface occur depression, projection, drip tumor, lack of penetration a, undercut etc. affect liquid in pipe flow or
The defect of liquid film forming, in turn ensure that in postwelding pipe that welding bead molded surface is smooth, smooth, zero defect, and can make pipe
The first-time qualification rate of butt weld ray Non-Destructive Testing is more than 99%, thus heat exchanger tube right in manufacturing for heat transmission equipment
Connecing weldering, the particularly butt welding to in-service vertical (falling film type) heat transmission equipment heat exchanger tube provides guarantee reliably.
One of the present invention preferred embodiment in, for the ease of coordinating the butt tube to be welded of different size specification
10 use, as it is shown on figure 3, the welding apparatus in pipe of butt tube also includes: be conductively connected assembly, be conductively connected group
Part includes conducting rod 5 and is set in the insulation sleeve 6 outside conducting rod 5, and one end of conducting rod 5 is provided with female thread, weldering
Tool bar 1 is provided with external screw thread, is coordinated with externally threaded by female thread, and one end of conducting rod 5 is connected with soldering set bar 1
Connecing, soldering set bar 1 can be with conducting rod 5 synchronous axial system, and the end face of locating ring 4 is connected on the end face of ceramic nozzle 2,
On the end face of one end that the other end of locating ring 4 is connected to conducting rod 5, i.e. locating ring 4 is clipped in ceramic nozzle 2
And between conducting rod 5, conducting rod 5 be provided with axially through the second inlet channel 51, the second inlet channel 51 and
One inlet channel 11 is connected and forms protection gas passage, before welding, external air source is connected with protection gas passage,
And open external air source and be filled with protection gas in protection gas passage, protection gas enters spray along protection gas passage through water conservancy diversion through hole
Mouth 21, and under the restriction effect of spout 21, it is full of electrode 3 periphery, and in welding process, external air source is lasting
To protection gas passage in be filled with protection gas, welding time, welding machine is connected with conducting rod 5, electric current pass through conducting rod 5,
Soldering set bar 1 is transferred to electrode 3, simultaneously by driving manually or motor drives and is conductively connected assembly and rotates, makes
Being conductively connected assembly and drive soldering set bar 1 synchronous axial system, soldering set bar 1 rotational band moving electrode 3 is along butt tube 10 to be welded
Interface moves, and completes to manage interior welding, wherein, owing to the external diameter of conducting rod 5 is more than soldering set bar 1, in order to avoid conduction
Bar 5 forms short-circuit situation generation when rotation with the tube wall contact position of butt tube 10 to be welded, outside conducting rod 5
The sheathed insulation sleeve in portion 6, is separated conducting rod 5 with butt tube 10 to be welded by insulation sleeve 6, thus ensure that electric current
Electrode 3 can be flowed to by conducting rod 5.
Wherein, it is enclosed between outer surface and the inner surface of butt tube 10 of the insulation sleeve 6 outside conducting rod 5 and has
The gap of 2mm～4mm.
In the present embodiment, it is possible to use shorter soldering set bar 1, by being conductively connected assembly by welding machine and soldering set bar
1 electrical connection, external air source are connected with water conservancy diversion through hole, i.e. extend the length of soldering set bar 1 by being conductively connected assembly,
Make that soldering set bar 1 can to extend to butt tube 10 to be welded outside by being conductively connected assembly, so that welding machine, outer
Connection between portion's source of the gas and soldering set bar 1 becomes simple and convenient.
Further, conducting rod 5 is threaded connection for multiple metal tubes and forms, so so that conducting rod 5 can root
According to the length adjustment of butt tube 10 to be welded, i.e. according to the length of butt tube 10 to be welded, appropriate metal tube is selected to be connected
Connect composition conducting rod 5, thus avoid conducting rod 5 too short impact welding and the connection of external air source, or conducting rod
5 long affect welding efficiency.
Concrete, a length of 300mm-500mm of each metal tube, the side of each metal tube is provided with female thread, another
Side is provided with external screw thread, and adjacent two metal tubes are connected with the externally threaded cooperation that spins by female thread.
Further, for the ease of the connection between external air source and conducting rod 5, the other end of conducting rod 5 is provided with use
In the joint 52 of connection external air source, external air source seals with joint 52 and connects, so that external air source and conduction
The simpler convenience of connection between bar 5.
In a concrete example of the present embodiment, as it is shown in figure 5, positioning component also includes locating cover 7, locating cover
7 outsides being set in insulation sleeve 6 also connect with insulation sleeve 6, the outer ring surface of locating cover 7 can with in butt tube 10
Wall matched in clearance, one end of locating cover 7 soldering set bar 1 dorsad outwards turns down formation can be with the end face card of butt tube 10
Connect the rib 71 of cooperation, when driving positioning component to rotate, can somewhat apply active force to rib 71, make rib 71
Fit with butt tube 10 end face, i.e. by the snap-fit engagement of rib 71 with butt tube 10 end face, limit electrode and adjust
Save assembly, be conductively connected moving axially of assembly, so that electrode 3 can be all the time along the interface of butt tube 10
Mobile.
Further, as shown in Figure 4, the welding apparatus in pipe of butt tube also includes: rotate adjusting part, rotates regulation
Assembly includes the expansion set 8 being set in outside conducting rod 5 and is set in the regulation stationary fixture 9 outside expansion set 8, passes through
Regulation stationary fixture 9 makes expansion set 8 and conducting rod 5 swelling, and expansion set 8 is positioned at the side of conducting rod 5 soldering set bar 1 dorsad,
Expansion set 8 synchronous axial system is driven by rotating regulation stationary fixture 9, expansion set 8 rotational band moving conductive rod 5 synchronous axial system,
When electrode 3 uses and drives manually, can directly rotate regulation stationary fixture 9, regulation stationary fixture 9 drives leads
Electric pole 5 synchronous axial system, conducting rod 5 rotates and drives soldering set bar 1 synchronous axial system, soldering set bar 1 rotational band moving electrode 3
Synchronous axial system, when electrode 3 uses motor to drive, can be connected with the output shaft of motor by regulation stationary fixture 9,
Motor drives regulation stationary fixture 9 to rotate according to the rotating speed set, and regulation stationary fixture 9 band moving conductive rod 5 synchronizes to turn
Dynamic, conducting rod 5 rotates and drives soldering set bar 1 synchronous axial system, soldering set bar 1 rotational band moving electrode 3 synchronous axial system.
Further, along the moving direction of electrode 3, shape between central axis and the interface of butt tube 10 of electrode 3
The angle become is right angle or acute angle, so so that the welding apparatus in pipe of butt tube can be according to different to be welded right
The welding requirements of adapter 10, adjusts electrode 3 position, with the welding demand of satisfied difference butt tube to be welded 10.
Concrete, electrode 3 is connected with soldering set bar 1 by jackscrew.
Illustrate the assembling of welding apparatus in pipe and the use process of the butt tube that the present invention provides below in conjunction with the accompanying drawings:
As it is shown in figure 1, it is outside that earthenware muzzle is located at soldering set bar 1, in the spray of the corresponding ceramic nozzle 2 of soldering set bar 1
Extend radially through electrode 3 at mouth 21, and make electrode 3 extend radially out ceramic nozzle 2, by jackscrew by electrode 3
It is connected with soldering set bar 1, then one end of conducting rod 5 is spun with soldering set bar 1, wherein, treat according to conducting rod 5
The length appropriate metal tube of selection of weldering butt tube 10 is threaded connection and forms, then locating ring 4 is set in soldering set
On bar 1, and make the end face of locating ring 4 be connected on the end face of ceramic nozzle 2, then insulation sleeve 6 is set in
The outside of conducting rod 5, and make the end face of insulation sleeve 6 abut against with the other end of locating ring 4, wherein, in order to just
Welding apparatus in pipe in butt tube rotates in butt tube 10 to be welded, and the outer ring surface of the locating ring 4 of selection is with to be welded
There is between the inner surface of butt tube 10 about 1mm gap, afterwards locating cover 7 be set in the outside of insulation sleeve 6,
Finally expansion set 8 is set in the side of conducting rod 5 soldering set bar 1 dorsad, and regulation stationary fixture 9 is set in expansion set
8 is outside, makes expansion set 8 be connected with conducting rod 5 by regulation stationary fixture 9, so far completes weldering in the pipe of butt tube
The assembling of connection device；
It should be noted that wherein, electrode 3 is tungsten electrode, protection gas is argon, welding machine is argon arc welding machine；
In use, the welding apparatus in pipe of the butt tube assembled is inserted butt tube 10 to be welded, just makes electrode 3
Interface to butt tube 10 to be welded, rib 71 and the end face snap-fit engagement of butt tube 10 to be welded, then by docking to be welded
Pipe 10 is fixed, and then external air source is connected with the gas source connector 52 of conducting rod 5, and welding machine is connected with conducting rod 5
Connect, afterwards, open external air source and be filled with protection gas in protection gas passage, protection gas pass sequentially through protection gas passage,
Inducing QI through hole, finally enters spout 21 and is full of the periphery of electrode 3 under the restriction effect of spout 21, and in welding
During, continue to be filled with protection gas in protection gas passage, finally, open welding machine, simultaneously by driving manually
Or motor drives regulation stationary fixture 9 to rotate, and regulates stationary fixture 9 band moving conductive rod 5 synchronous axial system, conducting rod
5 rotate drive soldering set bar 1 synchronous axial system, and soldering set bar 1 rotational band moving electrode 3 is same along the interface of butt tube 10 to be welded
Step rotation completes to manage interior welding.
Present invention also offers the welding method of a kind of butt tube, use the welding apparatus in pipe of above-mentioned butt tube, this pipe
Interior welding method comprises the following steps:
S10: carry out butt tube to be welded welding pre-treatment；
S20: the welding apparatus in pipe of butt tube is inserted in butt tube to be welded, and makes electrode just to butt tube to be welded
Interface；
S30: butt tube to be welded uses the outer fixture of pipe fix；
S40: external air source is connected with soldering set bar, and soldering set bar is electrically connected with welding machine；
S50: open external air source, be passed through protection gas in soldering set bar, until the periphery of electrode is full of protection gas；
S60: according to material, the wall thickness of butt tube, adjust the welding condition of welding machine；
S70: open welding machine, rotates soldering set bar, and electrode does not dose weldering in having rotated pipe with soldering set bar along interface synchronization
The welding of silk；
S80: unload down tube extenal fixation fixture, rotates butt tube, completes to manage the welding of outer packed column GC by welding machine；
S90: close welding machine and external air source, the welding apparatus in pipe of butt tube is extracted in butt tube.
Wherein, in pipe during the welding of not packed column GC, the technological parameter of welding machine is: voltage 9V～11V, electric current
45A～60A, electrode is tungsten electrode, protection gas be purity 99.99%, flow be the argon of 10L/min～12L/min,
The rotating speed of electrode is 50mm/min～70mm/min；When managing the welding of outer packed column GC, the technological parameter of welding machine is:
Voltage 9V～11V, electric current 50A～70A, electrode is tungsten electrode, and protection gas is that purity 99.99%, flow are
The argon of 10L/min～12L/min.
The welding method of butt tube that the present invention provides, both efficiently solved bore 15 millimeters and more than, length 3000
Within Hao meter pipe docking cannot realize welding by both sides, the depression using existing welding procedure welding bead inner surface to occur, projection,
Drip tumor, lack of penetration, undercut etc. and affect liquid in pipe flowing or the defect of liquid film forming, in turn ensure that welding bead in postwelding pipe
Molded surface is smooth, smooth, zero defect, and the first-time qualification rate of pipe butt weld ray Non-Destructive Testing can be made to exist
More than 99%, thus the butt welding of heat exchanger tube in manufacturing for heat transmission equipment, particularly change in-service vertical (falling film type)
The butt welding of hot equipment heat exchanger tube provides guarantee reliably.
Further, welding pre-treatment specifically includes following steps:
S101: process end face and the groove of butt tube to be welded on machine cut equipment；
S102: remove the burr of the pipe end of butt tube to be welded, oil stain, and clean with acetone.
Welding pre-treatment has been effectively ensured that welding bead molded surface in postwelding pipe is smooth, smooth, zero defect.
Below with weld length as 3m, as a example by internal diameter is the butt tube of 15mm, illustrate the right of present invention offer
The concrete operation step of the welding method of adapter:
End face and the groove of processing butt tube to be welded on machine cut equipment are standby；
Remove the burr of generation, oil stain after the tube end maching of butt tube to be welded, and clean with acetone；
The welding apparatus in pipe of butt tube is inserted in butt tube to be welded, and makes the tungsten electrode interface just to butt tube to be welded；
Butt tube to be welded use the outer fixture of pipe fix；
External air source is connected with soldering set bar, and soldering set bar is electrically connected with argon arc welding machine；
Open external air source, be passed through in soldering set bar protection gas be purity 99.99%, flow be 10L/min～12L/min
Argon, until the periphery of tungsten electrode is full of argon；
Material according to butt tube, wall thickness, adjust the technological parameter of argon arc welding machine, and the technological parameter making argon arc welding machine is:
Voltage 9V～11V, electric current 45A～60A；
Open argon arc welding machine, rotate the welding apparatus in pipe of butt tube, make tungsten electrode with 50mm/min's～70mm/min
Rotating speed rotated pipe along interface synchronization in the welding of not packed column GC；
Unloading down tube extenal fixation fixture, rotate butt tube, the technological parameter adjusting welding machine is: voltage 9V～11V, electric current
50A～70A, completes to manage the welding of outer packed column GC by argon arc welding machine；
Close argon arc welding machine and external air source, the welding apparatus in pipe of butt tube is extracted in butt tube.
In sum, the welding apparatus in pipe of the butt tube that the present invention provides, it is possible to insert in butt tube to be welded, and lead to
Overdrive in soldering set bar rotational band moving electrode moves into line pipe along the interface synchronization of butt tube to be welded and weld, the most effectively solve
Bore 15 millimeters and more than, within length 3000 millimeters, pipe docking cannot realize welding by both sides, use existing weldering
Connect technique welding bead inner surface occur depression, projection, drip tumor, lack of penetration a, undercut etc. affect liquid in pipe flow or liquid
The defect that film is formed, in turn ensure that in postwelding pipe that welding bead molded surface is smooth, smooth, zero defect, and pipe can be made right
The first-time qualification rate of welding seam ray Non-Destructive Testing is more than 99%, thus the docking of heat exchanger tube in manufacturing for heat transmission equipment
Weldering, the particularly butt welding to in-service vertical (falling film type) heat transmission equipment heat exchanger tube provide guarantee reliably；
The welding method of the butt tube that the present invention provides, simple to operate, use the welding apparatus in pipe of above-mentioned butt tube,
Achieve bore 15 millimeters and more than, the welding by both sides of pipe docking within length 3000 millimeters, and enough ensure that pipe is right
Joint inner surface molding is smooth, smooth.
The foregoing is only the schematic detailed description of the invention of the present invention, be not limited to the scope of the present invention.Any
Those skilled in the art, the equivalent variations made on the premise of without departing from the design of the present invention and principle and amendment,
The scope of protection of the invention all should be belonged to.And it should be noted that on each ingredient of the present invention is not limited in
Stating overall applicability, each technical characteristic described in the description of the present invention can select one according to actual needs and individually adopt
With or select the multinomial use that combines, therefore, the present invention covers its relevant with this case inventive point in the nature of things
It combines and specifically applies.
Claims (10)
1. the welding apparatus in pipe of a butt tube, it is characterised in that the welding apparatus in pipe of described butt tube is at least
Including:
Electrode regulating assembly, described electrode regulating assembly includes soldering set bar, is set in the pottery spray outside described soldering set bar
Mouth, the sidewall of described ceramic nozzle is provided with spout, described soldering set bar be have axially through the first inlet channel
Electric conductor, the connection that described soldering set pole pair answers described nozzle can be removably mounted has electrode, described electrode to radially extend to institute
State the outside of ceramic nozzle, and described electrode can be with described soldering set bar synchronous rotary, the sidewall of described first inlet channel
It is provided with the inducing QI through hole being connected with described spout；
Positioning component, described positioning component includes that locating ring, described locating ring are set in the outside of described soldering set bar, institute
The outer ring surface stating locating ring can coordinate with the internal surface gaps of described butt tube.
The welding apparatus in pipe of butt tube the most according to claim 1, it is characterised in that described butt tube
Welding apparatus in pipe also includes:
Be conductively connected assembly, described in be conductively connected assembly and include conducting rod and be set in the insulation outside described conducting rod
Set, one end of described conducting rod is connected with described soldering set bar, described soldering set bar can with described conducting rod synchronous axial system,
The end face of described locating ring is connected on the end face of described ceramic nozzle, and the other end of described locating ring is connected to institute
On the end face of the one end stating conducting rod, described conducting rod be provided with axially through the second inlet channel, described second air inlet
Passage is connected with described first inlet channel and forms protection gas passage.
The welding apparatus in pipe of butt tube the most according to claim 2, it is characterised in that
Described conducting rod is that multiple metal tube is threaded connection and forms.
The welding apparatus in pipe of butt tube the most according to claim 2, it is characterised in that
The other end of described conducting rod is provided with the joint for connecting external air source.
The welding apparatus in pipe of butt tube the most according to claim 2, it is characterised in that
Described positioning component also include locating cover, described locating cover be set in described insulation sleeve outside and with described insulation
Set connects, and the outer ring surface of described locating cover can be with the internal face matched in clearance of described butt tube, described locating cover institute dorsad
State one end of soldering set bar outwards turn down formation can be with the rib of the end face snap-fit engagement of described butt tube.
The welding apparatus in pipe of butt tube the most according to claim 2, it is characterised in that described butt tube
Welding apparatus in pipe also includes:
Rotating adjusting part, described rotation adjusting part includes the expansion set being set in outside described conducting rod and is set in institute
Stating the regulation stationary fixture outside expansion set, described expansion set is positioned at the side of described conducting rod the most described soldering set bar, passes through
Rotating described regulation stationary fixture and drive described expansion set synchronous axial system, described expansion set rotates and drives described conducting rod to synchronize to turn
Dynamic.
The welding apparatus in pipe of butt tube the most according to any one of claim 1 to 6, it is characterised in that
Along the moving direction of described electrode, the folder formed between central axis and the interface of described butt tube of described electrode
Angle is right angle or acute angle.
The welding apparatus in pipe of butt tube the most according to any one of claim 1 to 6, it is characterised in that
The length of described butt tube is less than or equal to 3m, and the internal diameter of described butt tube is more than or equal to 15mm.
9. a welding method for butt tube, employing butt tube according to any one of the claims 1 to 8
Welding apparatus in pipe, it is characterised in that in described pipe, welding method comprises the following steps:
Carry out butt tube to be welded welding pre-treatment；
The welding apparatus in pipe of described butt tube is inserted in described butt tube to be welded, and makes electrode just to described to be welded right
The interface of adapter；
Described butt tube to be welded use the outer fixture of pipe fix；
External air source is connected with described soldering set bar, and described soldering set bar is electrically connected with welding machine；
Open external air source, in soldering set bar, be passed through protection gas, until the periphery of described electrode is full of described protection gas；
Material according to described butt tube, wall thickness, adjust the welding condition of described welding machine；
Opening described welding machine, rotate described soldering set bar, described electrode has rotated along described interface synchronization with described soldering set bar
Become the welding of not packed column GC in pipe；
Unload described pipe extenal fixation fixture, rotate described butt tube, complete to manage the weldering of outer packed column GC by described welding machine
Connect；
Close described welding machine and described external air source, the welding apparatus in pipe of described butt tube is pulled out in described butt tube
Go out.
The welding method of butt tube the most according to claim 9, it is characterised in that
Described welding pre-treatment specifically includes following steps:
Machine cut equipment is processed end face and the groove of described butt tube to be welded；
Remove the burr of pipe end of described butt tube to be welded, oil stain, and clean with acetone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562164.2A CN105965131A (en) | 2016-07-15 | 2016-07-15 | In-pipe welding device and method for butt joint pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610562164.2A CN105965131A (en) | 2016-07-15 | 2016-07-15 | In-pipe welding device and method for butt joint pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105965131A true CN105965131A (en) | 2016-09-28 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610562164.2A Pending CN105965131A (en) | 2016-07-15 | 2016-07-15 | In-pipe welding device and method for butt joint pipe |
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| Country | Link |
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| CN (1) | CN105965131A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106735759A (en) * | 2017-01-07 | 2017-05-31 | 衢州普雷特过滤器材有限公司 | The cylindric folding anti-oxidation welding equipment of ripple filter screen of stainless steel |
| CN111299977A (en) * | 2020-03-19 | 2020-06-19 | 招商局重工（江苏）有限公司 | Tail shaft sleeve pipe joint lengthening process |
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Application publication date: 20160928 |