CN110270742A - Weld the gas supply welding mechanism and its construction method of all steel indirect cool tower tripod girder steel - Google Patents
Weld the gas supply welding mechanism and its construction method of all steel indirect cool tower tripod girder steel Download PDFInfo
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- CN110270742A CN110270742A CN201910642798.2A CN201910642798A CN110270742A CN 110270742 A CN110270742 A CN 110270742A CN 201910642798 A CN201910642798 A CN 201910642798A CN 110270742 A CN110270742 A CN 110270742A
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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
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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
- B23K9/32—Accessories
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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
- B23K9/32—Accessories
- B23K9/325—Devices for supplying or evacuating shielding gas
Abstract
The invention discloses a kind of gas supply welding mechanism and its construction method for welding all steel indirect cool tower tripod girder steel, solves the problems, such as to carry out all steel indirect cool tower tripod girder steel in high-altitude splicing welding and have that time-consuming great work intensity welding quality not can guarantee.Splice tripod girder steel (25) and middle splint (26) to be welded in vertical state, splicing tripod girder steel welding groove (27) to be welded is 25 degree, splice the spacing h(30 between the tip and middle splint (26) of tripod girder steel welding groove (27) to be welded) it is 8 millimeters, it is provided with weld seam ceramic lining plate (28) between the tip bottom surface of tripod girder steel welding groove (27) and the welded connecting face of middle splint (26) to be welded splicing, the angle α (29) between weld seam ceramic lining plate (28) and middle splint (26) is 45 degree.The present invention provides simple and easy embodiment for the splicing welding of all steel indirect cool tower tripod girder steel.
Description
Technical field
The present invention relates to a kind of cyclic annular triangle gridding frame body structures of the full steel structure indirect air cooling tower in thermal power plant
The overhead welding construction mechanism of part, in particular to it is a kind of that tripod girder steel adjacent in cyclic annular triangle gridding shelf component is implemented
Overhead connection construction method of used gas supply welding mechanism and its gas supply welding mechanism when welding.
Background technique
Large-scale full steel structure indirect air cooling tower is by lower cone body support frame, top tower body, reinforcing ring, peripheral protective aluminium sheet
Equal Member Weldings form, and generally require and weld to hundreds of triangle griddings and tens broadenings, and welding weight reaches thousands of tons of,
Nearly 200 meters of tower body height；About more than 100 meters of Upper cylindrical tower body height, about 96 meters of cylinder tower body diameter, by more than 12 layer 400 three
Hexagonal lattice composition；Lower part cone is about 65 meters high, and base diameter is more than 150 meters, by several layers, a triangular mesh more than 200, and
One layer of tens broadening are welded to form；Stiffening ring has several layers.Triangular mesh and broadening mainly use Q345B and Q235B steel,
Welding procedure is carried out using medicine core carbon dioxide gas arc welding (FCAW), welded using CO2 gas in the welding process
Seam protection, while the cleaning of back of weld root is carried out using compressed air.Since indirect cool tower ring-type frame body is by weldering component
Body is triangular shape, and multiple triangular shapes are soldered component and are spliced into annular shape, and in welding, generation local deformation is comprehended in commissure,
Only weld seam local deformation could be overcome to be produced well by the way of synchronous welding each splicing component on same annulus
The raw influence to each splicing weldment concentricity, and the pressure and confession of CO2 weld seam protection gas used when the welding of each weld seam
The quality that will have a direct impact on welding cyclization should be measured, how synchronous welding is implemented to each weld seam for being welded into ring, and weld synchronous
The pressure and supply of the CO2 weld seam protection gas of each weld seam welding are effectively precisely controlled in connecing, greatly improve welding quality at
For the live technical issues that need to address；Existing site welding method is that multiple CO2 gas cylinders are successively lifted into high-altitude middle ring
On shape weld holder, there are lifting heavy workload, the gas capacity of especially each welding CO2 gas cylinder is small, if welding process is changed
Gas not in time, can influence the quality of weld seam because of protective gas insufficient pressure；In addition, the mode of seperated lifting gas cylinder is also deposited
It is long in the welding procedure early-stage preparations time, influence the progress of entire welding sequence.
The cyclic annular triangle gridding shelf component of steel construction indirect air cooling tower is to be merged in high-altitude using FCAW welding group
Made of connecing, adjacent tripod girder steel with a thickness of 8-16 millimeters, welding groove angle is 45 °, and welding end surface is " mouth " font
The end face and the middle splint with a thickness of 20-25 millimeters in the air when welding, are carried out gapless corner connection welding, welding by end face
Process are as follows: the welding of weld seam front is first carried out after the welding of weld seam front using CO2 gas and carries out back of weld with compressed air
Root cleaning, then using CO2 gas carry out the weld seam back welding, after welding front and back, formed full penetration weld；
The requirement of technique welding sequence just can be carried out the welding of the next position weld seam after the welding of same position weld seam full penetration；Due to triangle
Frame member is to be combined into 800 × 900 millimeters of " mouth " figure space shapes before overhead welding, and welding personnel is according to Welder
Skill requirement, pass in and out narrow " mouth " figure space repeatedly, carry out the welding of weld seam front, the root cleaning of back of weld and weldering
It welds at the back side of seam；In addition, carrying out the cleaning of fillet in normal shear root using carbon arc air gouging, the splashing of generation is larger, and arc light causes to burn
Wound, burn and noxious fume cannot effectively be spread apart, and an end face girder steel welding will carry out four back chipping processing, and welder is repeatedly
Into small space, great work intensity is brought, soldering seam grinding quality not can guarantee, and back chipping processing is time-consuming very long, seriously affect
The health of operator and the welding quality and efficiency of entire frame body are arrived.
Summary of the invention
The present invention provides a kind of gas supply welding mechanism and its construction method for welding all steel indirect cool tower tripod girder steel, solutions
It has determined and splicing welding is carried out to all steel indirect cool tower tripod girder steel in high-altitude using traditional medicine core carbon dioxide gas arc welding
The great work intensity welding quality that there is technical issues that time-consuming.
A kind of gas supply welding mechanism welding all steel indirect cool tower tripod girder steel, including under welding full steel structure air cooling tower
Portion's cone bracket is provided with top link on the top of the lower cone body support frame of full steel structure air cooling tower, in lower cone body support frame
On be provided with and splice tripod girder steel to be welded, middle splint is provided between two adjacent tripod girder steels, is spliced to be welded
Tripod girder steel and middle splint in vertical state, splice tripod girder steel welding groove to be welded be 25 degree, splicing it is to be welded
Tripod girder steel welding groove tip and middle splint between spacing h be 8 millimeters, splicing tripod girder steel to be welded
Weld seam ceramic lining plate, weld seam ceramic lining plate are provided between the tip bottom surface of welding groove and the welded connecting face of middle splint
Angle α between middle splint is 45 degree, splice tripod girder steel to be welded with a thickness of 8-16 millimeters, the thickness of middle splint
Degree is 20-25 millimeters；It is also respectively provided between two adjacent tripod girder steels and weld defect processing is carried out to weld seam
Delivery pipe is used in blowpipe and the welding of CO2 weld seam protection gas.
The main gas supply ring pipe of closed CO2 is provided on the inside of the bottom end of welding full steel structure air cooling tower lower cone body support frame
Road, the closed main gas supply annulus line of CO2 is connected together by CO2 gas access tube and liquid CO 2 gas source tank, in CO2 gas
It is provided with CO2 gas gas source control valve on body access tube, has been equally spaced on the main gas supply annulus line of closed CO2
CO2 supplies gas tributary interface, supplies gas in CO2 and is connected with CO2 on tributary interface and vertically supplies gas bypass duct, vertically supplies gas branch in CO2
The lower end of pipe is provided with CO2 and vertically supplies gas branch road control valve, and vertically supplying gas in CO2, to be connected with CO2 vertical for the upper port of bypass duct
It supplies gas top four-way, CO2 weld seam protection gas gas chamber is respectively connected on the other three interface that CO2 vertically supplies gas top four-way and is connect
Enter pipe, CO2 weld seam protection gas gas chamber, CO2 weld seam are connected on the another port of CO2 weld seam protection gas gas chamber access tube
Protective gas gas chamber is articulated in the top of the top setting of welding full steel structure air cooling tower lower cone body support frame by gas chamber
On link, it is provided with CO2 weld seam protection gas delivery port on CO2 weld seam protection gas gas chamber, it is defeated in CO2 weld seam protection gas
CO2 weld seam protection gas flow meter is provided in outlet, CO2 weld seam protection gas delivery port and CO2 weld seam protection gas weld
It is connected together with delivery pipe.
It is provided with the main gas supply annulus line of closed compressed air on the outside of the main gas supply annulus line of closed CO2, seals
The main gas supply annulus line of the compressed air closed is connected together by compressed air gas access tube with air compressor, is being compressed
Compressed air gas gas source control valve is provided on air gas access tube, in the main gas supply annulus line of closed compressed air
On be equally spaced compressed air and supplied gas tributary interface, supplying gas in compressed air, to be connected with compressed air on tributary interface perpendicular
To bypass duct of supplying gas, it is provided with compressed air in vertically the supply gas lower end of bypass duct of compressed air and vertically supplies gas branch road control valve,
It is connected with threeway in the upper port that compressed air vertically supplies gas bypass duct, it is perpendicular in vertically supply gas bypass duct and CO2 of compressed air
To rubber binding strap is provided between bypass duct of supplying gas, threeway is connected to the root cleaning of back of weld with blowpipe
Together.
The closed main gas supply annulus line of CO2 and the main gas supply annulus line of closed compressed air are by arc seamless steel
What tube coupling and rubber fittings splicing connection formed, rubber fittings are bolted between two adjacent arc seamless steel tube couplings,
Tributary interface of supplying gas is provided on arc seamless steel tube coupling.
A kind of construction method of the gas supply welding mechanism of welding all steel indirect cool tower tripod girder steel, comprising the following steps:
The first step, tripod girder steel to be welded is spliced in setting on lower cone body support frame, between two adjacent tripod girder steels
Middle splint is set, splices tripod girder steel and middle splint to be welded in vertical state, splices tripod girder steel weldering to be welded
Connecing groove is 25 degree, and splicing the spacing h between the tip and middle splint of tripod girder steel welding groove to be welded is 8 millimeters,
Weld seam is set between the tip bottom surface of tripod girder steel welding groove and the welded connecting face of middle splint to be welded splicing
Ceramic lining plate, the angle α between weld seam ceramic lining plate and middle splint are 45 degree, between two adjacent tripod girder steels respectively
The root cleaning blowpipe and CO2 weld seam protection gas welding delivery pipe of back of weld are set；
Second step, processing arc seamless steel tube coupling, process tributary interface of supplying gas on arc seamless steel tube coupling, seamless in arc
Screw thread is set on two nozzle of steel pipe joint, screw thread is set at the both ends of rubber fittings；
Top link is arranged on the top of welding full steel structure air cooling tower lower cone body support frame in third step, in welding full steel structure
The splicing connection composition closing that the Basolateral of air cooling tower lower cone body support frame passes through arc seamless steel tube coupling and rubber fittings
The main gas supply annulus line of CO2；
The main gas supply annulus line of closed CO2 is connected to liquid CO 2 gas source tank one by the 4th step by CO2 gas access tube
It rises；
5th step is vertically supplied gas bypass duct in the CO2 connection CO2 on tributary interface that supplies gas, and is vertically supplied gas the upper end of bypass duct in CO2
Mouthful connection CO2 vertically supplies gas top four-way, and CO2 weld seam guarantor is all connected on the other three interface that CO2 vertically supplies gas top four-way
Gas gas chamber access tube is protected, CO2 weld seam protection gas gas is connected on the another port of CO2 weld seam protection gas gas chamber access tube
CO2 weld seam protection gas gas chamber is articulated in the top of welding full steel structure air cooling tower lower cone body support frame by room by gas chamber
On the top link for holding setting, CO2 weld seam protection gas flow meter is set on CO2 weld seam protection gas delivery port；
6th step, closed CO2 it is main gas supply annulus line outside, pass through the spelling of arc seamless steel tube coupling and rubber fittings
The closed main gas supply annulus line of compressed air of composition is connect in succession；
7th step is vertically supplied gas bypass duct in compressed air connection compressed air on tributary interface of supplying gas, vertical in compressed air
Threeway is connected in the upper port for bypass duct of supplying gas, bypass duct is vertically supplied gas in compressed air and CO2 vertically supplies gas between bypass duct
Connect rubber binding strap；
CO2 weld seam protection gas delivery port and CO2 weld seam protection gas welding are connected together by the 8th step with delivery pipe, will
Threeway and the root cleaning of back of weld are connected together with blowpipe；
9th step is formed by fillet weld to weld seam ceramic lining plate, tripod girder steel and weld seam ceramic lining plate, is welded using FCAW
Method layering is welded, and full penetration fillet weld is formed, and carries out weld defect cleaning to fillet weld by blowpipe.
The present invention carries out the fillet weld that welding ceramics liner, girder steel and clamping plate are formed using the layering of FCAW welding method, is
Multi-pass welding technique forms full penetration fillet weld, provides simple and easy embodiment, the synchronous weldering of each weld seam in high-altitude
It connects in implementation, on ground in the form of double gas supply, the CO2 protective gas of pressure such as provides for each weld seam, substantially increase ring-type
The welding quality of frame body；Surface deployment gas main eliminates the height of CO2 gas cylinder by the flexible laying for bypass duct of vertically supplying gas
Sky lifting process, substantially increases construction efficiency；According to the size of air cooling tower, ground flexibly lay supply gas tributary interface and
The use of four-way at the top of bypass duct of supplying gas greatly expands the quantity of available gas supply point, greatly improves aerial welding protection
The combination flexibility that gas point is laid, reduces construction cost.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Structural schematic diagram when Fig. 2 is the welding of the fillet weld between tripod girder steel 25 and middle splint 26 of the invention；
Fig. 3 is the structural schematic diagram of welding air supply system of the invention；
Fig. 4 is the connection structure for splicing schematic diagram of arc seamless steel tube coupling 23 and rubber fittings 24 of the invention；
Fig. 5 is the structural schematic diagram of arc seamless steel tube coupling 23 of the invention；
Fig. 6 is the structural schematic diagram of CO2 weld seam protection gas gas chamber 10 of the invention；
Fig. 7 is that the connection structure that CO2 of the invention vertically supplies gas bypass duct 6 and CO2 vertically supplies gas between top four-way 8 is illustrated
Figure；
Fig. 8 is the attachment structure schematic diagram that compressed air of the invention is vertically supplied gas between bypass duct 19 and threeway 21.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing:
A kind of gas supply welding mechanism welding all steel indirect cool tower tripod girder steel, the lower cone including welding full steel structure air cooling tower
Body support frame is provided with top link on the top of the lower cone body support frame of full steel structure air cooling tower, sets on lower cone body support frame
Be equipped with and splice tripod girder steel 25 to be welded, be provided with middle splint 26 between two adjacent tripod girder steels 25, splicing to
In vertical state, splice tripod girder steel welding groove 27 to be welded is 25 degree to the tripod girder steel 25 and middle splint 26 of weldering,
Splicing spacing h30 between the tip and middle splint 26 of tripod girder steel welding groove 27 to be welded is 8 millimeters, splicing to
Weld seam pottery is provided between the tip bottom surface of tripod girder steel welding groove 27 and the welded connecting face of middle splint 26 of weldering
Ceramic liner plate 28, the angle α 29 between weld seam ceramic lining plate 28 and middle splint 26 are 45 degree, splice tripod girder steel 25 to be welded
With a thickness of 8-16 millimeters, middle splint 26 with a thickness of 20-25 millimeters；Also distinguish between two adjacent tripod girder steels 25
It is provided with the root cleaning blowpipe 31 and CO2 weld seam protection gas welding delivery pipe 32 of back of weld.
The main gas supply ring pipe of closed CO2 is provided on the inside of the bottom end of welding full steel structure air cooling tower lower cone body support frame
Road 1, the closed main gas supply annulus line 1 of CO2 are connected together by CO2 gas access tube 3 with liquid CO 2 gas source tank 2,
CO2 gas gas source control valve 4 is provided on CO2 gas access tube 3, on the main gas supply annulus line 1 of closed CO2 at equal intervals
Ground is provided with CO2 and supplies gas tributary interface 5, supplies gas in CO2 and is connected with CO2 on tributary interface 5 and vertically supplies gas bypass duct 6, perpendicular in CO2
The lower end for bypass duct 6 of supplying gas is provided with CO2 vertically to supply gas branch road control valve 7, vertically supplies gas the upper port of bypass duct 6 in CO2
It is connected with CO2 vertically to supply gas top four-way 8, CO2 weldering is respectively connected on the other three interface that CO2 vertically supplies gas top four-way 8
Protective gas gas chamber access tube 9 is stitched, CO2 weld seam guarantor is connected on the another port of CO2 weld seam protection gas gas chamber access tube 9
Gas gas chamber 10 is protected, CO2 weld seam protection gas gas chamber 10 is articulated in welding full steel structure air cooling tower lower part by gas chamber hook 13
On the top link of the top setting of cone bracket, CO2 weld seam protection gas is provided on CO2 weld seam protection gas gas chamber 10
Delivery outlet 11 is provided with CO2 weld seam protection gas flow meter 12, CO2 weld seam protection on CO2 weld seam protection gas delivery port 11
Gas delivery port 11 and CO2 weld seam protection gas welding delivery pipe 32 is connected together.
The outside of the main gas supply annulus line 1 of closed CO2 is provided with the main gas supply annulus line 14 of closed compressed air,
The closed main gas supply annulus line 14 of compressed air is connected to air compressor 15 one by compressed air gas access tube 16
It rises, compressed air gas gas source control valve 17 is provided on compressed air gas access tube 16, in closed compressed air
It has been equally spaced compressed air on main gas supply annulus line 14 to supply gas tributary interface 18, has supplied gas tributary interface in compressed air
It is connected with compressed air on 18 vertically to supply gas bypass duct 19, vertically the supply gas lower end of bypass duct 19 of compressed air is provided with compression
Air is vertically supplied gas branch road control valve 20, and threeway 21 is connected in the upper port that compressed air vertically supplies gas bypass duct 19,
Rubber binding strap 22, threeway 21 and weldering are provided between bypass duct 6 that compressed air vertically supplies gas bypass duct 19 and CO2 vertically supplies gas
The root cleaning blowpipe 31 at the seam back side is connected together.
The closed main gas supply annulus line 1 of CO2 and the main gas supply annulus line 14 of closed compressed air be by arc without
It stitches steel pipe joint 23 and the splicing of rubber fittings 24 connects composition, be bolted with rubber between two adjacent arc seamless steel tube couplings
Pipe fitting 24 is provided with tributary interface of supplying gas on arc seamless steel tube coupling 23.
A kind of construction method of the gas supply welding mechanism of welding all steel indirect cool tower tripod girder steel, comprising the following steps:
The first step, tripod girder steel 25 to be welded is spliced in setting on lower cone body support frame, in two adjacent tripod girder steels 25
Between middle splint 26 is set, splice tripod girder steel 25 to be welded and middle splint 26 in vertical state, splice to be welded three
Corner bracket girder steel welding groove 27 is 25 degree, between the tip and middle splint 26 for splicing tripod girder steel welding groove 27 to be welded
Spacing h30 be 8 millimeters, in the weldering for the tip bottom surface and middle splint 26 for splicing tripod girder steel welding groove 27 to be welded
Weld seam ceramic lining plate 28 is set between junction in succession, the angle α 29 between weld seam ceramic lining plate 28 and middle splint 26 is 45 degree,
Root cleaning blowpipe 31 and the CO2 weldering of back of weld are respectively set between two adjacent tripod girder steels 25
Stitch Shielding gas delivery pipe 32；
Second step, processing arc seamless steel tube coupling 23, process tributary interface of supplying gas on arc seamless steel tube coupling 23, in arc
Screw thread is set on 23 liang of nozzles of seamless steel tube coupling, screw thread is set at the both ends of rubber fittings 24；
Top link is arranged on the top of welding full steel structure air cooling tower lower cone body support frame in third step, in welding full steel structure
The Basolateral of air cooling tower lower cone body support frame connect composition with the splicing of rubber fittings 24 by arc seamless steel tube coupling 23
The closed main gas supply annulus line 1 of CO2；
The main gas supply annulus line 1 of closed CO2 is connected to by the 4th step by CO2 gas access tube 3 with liquid CO 2 gas source tank 2
Together；
5th step is vertically supplied gas bypass duct 6 in the CO2 connection CO2 on tributary interface 5 that supplies gas, and is vertically supplied gas bypass duct 6 in CO2
Upper port connection CO2 vertically supplies gas top four-way 8, is all connected with CO2 on the other three interface that CO2 vertically supplies gas top four-way 8
Weld seam protection gas gas chamber access tube 9 connects CO2 weld seam on the another port of CO2 weld seam protection gas gas chamber access tube 9 and protects
Gas gas chamber 10 is protected, CO2 weld seam protection gas gas chamber 10 is articulated under welding full steel structure air cooling tower by gas chamber hook 13
On the top link of the top setting of portion's cone bracket, CO2 weld seam protection gas is set on CO2 weld seam protection gas delivery port 11
Body flowmeter 12；
6th step, closed CO2 it is main gas supply annulus line 1 outside, pass through arc seamless steel tube coupling 23 and rubber fittings
24 splicing connection forms the closed main gas supply annulus line 14 of compressed air；
7th step is vertically supplied gas bypass duct 19 in compressed air connection compressed air on tributary interface 18 of supplying gas, in compressed air
Threeway 21 is connected in the upper port for bypass duct 19 of vertically supplying gas, and is vertically supplied gas in the compressed air bypass duct 19 and CO2 that vertically supplies gas
Rubber binding strap 22 is connected between bypass duct 6；
CO2 weld seam protection gas delivery port 11 is connected to CO2 weld seam protection gas welding delivery pipe 32 one by the 8th step
It rises, threeway 21 and the root cleaning blowpipe 31 of back of weld is connected together；
9th step is formed by fillet weld to weld seam ceramic lining plate 28, tripod girder steel 25 and weld seam ceramic lining plate 28, uses
The layering of FCAW welding method is welded, and is formed full penetration fillet weld, is carried out by blowpipe 31 to fillet weld scarce
Fall into cleaning.
Claims (5)
1. a kind of gas supply welding mechanism for welding all steel indirect cool tower tripod girder steel, the lower part including welding full steel structure air cooling tower
Cone bracket is provided with top link on the top of the lower cone body support frame of full steel structure air cooling tower, on lower cone body support frame
It is provided with and splices tripod girder steel (25) to be welded, be provided with middle splint between two adjacent tripod girder steels (25)
(26), which is characterized in that splice tripod girder steel (25) and middle splint (26) to be welded in vertical state, splice to be welded three
Corner bracket girder steel welding groove (27) is 25 degree, splices tip and the middle splint of tripod girder steel welding groove (27) to be welded
(26) the spacing h(30 between) it is 8 millimeters, in the tip bottom surface for splicing tripod girder steel welding groove (27) to be welded in
Between clamping plate (26) welded connecting face between be provided with weld seam ceramic lining plate (28), weld seam ceramic lining plate (28) and middle splint
(26) angle α (29) between is 45 degree, splice tripod girder steel (25) to be welded with a thickness of 8-16 millimeters, middle splint
(26) with a thickness of 20-25 millimeters；The root of back of weld is also respectively provided between two adjacent tripod girder steels (25)
Cleaning uses delivery pipe (32) with blowpipe (31) and the welding of CO2 weld seam protection gas.
2. a kind of gas supply welding mechanism for welding all steel indirect cool tower tripod girder steel according to claim 1, feature exist
In, welding full steel structure air cooling tower lower cone body support frame bottom end on the inside of be provided with the main gas supply annulus line of closed CO2
(1), the main gas supply annulus line (1) of closed CO2 is connected to liquid CO 2 gas source tank (2) one by CO2 gas access tube (3)
It rises, CO2 gas gas source control valve (4) is provided on CO2 gas access tube (3), in the main gas supply annulus line of closed CO2
(1) it has been equally spaced CO2 on to supply gas tributary interface (5), has supplied gas in CO2 and is connected with CO2 on tributary interface (5) and vertically supplies gas
Bypass duct (6) is provided with CO2 and vertically supplies gas branch road control valve (7) in vertically the supply gas lower end of bypass duct (6) CO2, perpendicular in CO2
CO2 is connected with to the upper port of bypass duct of supplying gas (6) vertically to supply gas top four-way (8), vertically supplies gas top four-way (8) in CO2
The other three interface on be respectively connected with CO2 weld seam protection gas gas chamber access tube (9), CO2 weld seam protection gas gas chamber access
It manages and is connected with CO2 weld seam protection gas gas chamber (10) on the another port of (9), CO2 weld seam protection gas gas chamber (10) passes through gas
Room hook (13) is articulated on the top link of top setting of welding full steel structure air cooling tower lower cone body support frame, is welded in CO2
It is provided with CO2 weld seam protection gas delivery port (11) on seam protective gas gas chamber (10), in CO2 weld seam protection gas delivery port
(11) CO2 weld seam protection gas flow meter (12), CO2 weld seam protection gas delivery port (11) and CO2 weld seam protection are provided on
Gas welding is connected together with delivery pipe (32).
3. a kind of gas supply welding mechanism for welding all steel indirect cool tower tripod girder steel according to claim 2, feature exist
In, the main gas supply annulus line (14) of closed compressed air is provided on the outside of the main gas supply annulus line (1) of closed CO2,
The closed main gas supply annulus line (14) of compressed air is connected by compressed air gas access tube (16) and air compressor (15)
Lead to together, compressed air gas gas source control valve (17) is provided on compressed air gas access tube (16), is being closed
The main gas supply annulus line (14) of compressed air on be equally spaced compressed air and supplied gas tributary interface (18), it is empty in compression
It is connected with compressed air on pneumatic transmission gas tributary interface (18) vertically to supply gas bypass duct (19), vertically supplies gas bypass duct in compressed air
(19) lower end is provided with compressed air and vertically supplies gas branch road control valve (20), vertically supplies gas bypass duct (19) in compressed air
It is connected with threeway (21) in upper port, vertically supplies gas bypass duct (19) in compressed air and CO2 vertically supplies gas between bypass duct (6)
It is provided with rubber binding strap (22), threeway (21) is cleared up with the root of back of weld and is connected to blowpipe (31) one
It rises.
4. a kind of gas supply welding mechanism for welding all steel indirect cool tower tripod girder steel according to claim 3, feature exist
In the closed main gas supply annulus line (1) of CO2 and the main gas supply annulus line (14) of closed compressed air are seamless by arc
What steel pipe joint (23) and rubber fittings (24) splicing connection formed, rubber is bolted between two adjacent arc seamless steel tube couplings
Rubber hose coupling (24) is provided with tributary interface of supplying gas on arc seamless steel tube coupling (23).
5. a kind of construction method of the gas supply welding mechanism of welding all steel indirect cool tower tripod girder steel, comprising the following steps:
The first step, tripod girder steel (25) to be welded is spliced in setting on lower cone body support frame, in two adjacent tripod girder steels
(25) middle splint (26) are set between, splices tripod girder steel (25) and middle splint (26) to be welded in vertical state, spells
Reception weldering tripod girder steel welding groove (27) be 25 degree, splice tripod girder steel welding groove (27) to be welded tip and
Spacing h(30 between middle splint (26)) it is 8 millimeters, under the tip for splicing tripod girder steel welding groove (27) to be welded
Weld seam ceramic lining plate (28) are set between bottom surface and the welded connecting face of middle splint (26), weld seam ceramic lining plate (28) and centre
Angle α (29) between clamping plate (26) is 45 degree, and back of weld is respectively set between two adjacent tripod girder steels (25)
Root cleaning uses delivery pipe (32) with blowpipe (31) and the welding of CO2 weld seam protection gas；
Second step, processing arc seamless steel tube coupling (23), process tributary interface of supplying gas on arc seamless steel tube coupling (23),
Screw thread is set on (23) two nozzle of arc seamless steel tube coupling, screw thread is set at the both ends of rubber fittings (24)；
Top link is arranged on the top of welding full steel structure air cooling tower lower cone body support frame in third step, in welding full steel structure
The Basolateral of air cooling tower lower cone body support frame is connect by arc seamless steel tube coupling (23) with the splicing of rubber fittings (24)
Form the main gas supply annulus line (1) of closed CO2；
4th step passes through CO2 gas access tube (3) for the main gas supply annulus line (1) of closed CO2 and liquid CO 2 gas source tank (2)
It is connected together；
5th step is vertically supplied gas bypass duct (6) in the CO2 connection CO2 on tributary interface (5) that supplies gas, and is vertically supplied gas bypass duct in CO2
(6) upper port connection CO2 vertically supplies gas top four-way (8), on the other three interface that CO2 vertically supplies gas top four-way (8)
It is all connected with CO2 weld seam protection gas gas chamber access tube (9), on the another port of CO2 weld seam protection gas gas chamber access tube (9)
It connects CO2 weld seam protection gas gas chamber (10), CO2 weld seam protection gas gas chamber (10) is articulated in weldering by gas chamber hook (13)
It connects on the top link of top setting of full steel structure air cooling tower lower cone body support frame, in CO2 weld seam protection gas delivery port
(11) CO2 weld seam protection gas flow meter (12) are set on；
6th step, closed CO2 it is main gas supply annulus line (1) outside, pass through arc seamless steel tube coupling (23) and rubber tube
The splicing connection of connector (24) forms the closed main gas supply annulus line (14) of compressed air；
7th step is vertically supplied gas bypass duct (19) in compressed air connection compressed air on tributary interface (18) of supplying gas, and is being compressed
Air vertically supply gas bypass duct (19) upper port on connect threeway (21), compressed air vertically supply gas bypass duct (19) with
CO2 vertically supplies gas and connects rubber binding strap (22) between bypass duct (6)；
CO2 weld seam protection gas delivery port (11) is connected to by the 8th step with the welding of CO2 weld seam protection gas with delivery pipe (32)
Together, the root of threeway (21) and back of weld is cleared up and is connected together with blowpipe (31)；
9th step is formed by fillet weld to weld seam ceramic lining plate (28), tripod girder steel (25) and weld seam ceramic lining plate (28),
It is welded using the layering of FCAW welding method, full penetration fillet weld is formed, by blowpipe (31) to fillet weld
It is cleared up.
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| CN116727914A (en) * | 2023-08-11 | 2023-09-12 | 苏芯物联技术(南京)有限公司 | Real-time intelligent control method for welding shielding gas under short welding seam scene |
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| CN110270742B (en) | 2023-07-21 |
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