CN103433606A - Special portable miniature drainage cover for automatic underwater local dry-method welding - Google Patents
Special portable miniature drainage cover for automatic underwater local dry-method welding Download PDFInfo
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- CN103433606A CN103433606A CN2013103627778A CN201310362777A CN103433606A CN 103433606 A CN103433606 A CN 103433606A CN 2013103627778 A CN2013103627778 A CN 2013103627778A CN 201310362777 A CN201310362777 A CN 201310362777A CN 103433606 A CN103433606 A CN 103433606A
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Abstract
The invention provides a special portable miniature drainage cover for automatic underwater local dry-method welding. A drainage cover body of the drainage cover comprises an upper end cover, an organic glass cover and a lower end cover. A clamping rod, an air inlet quick plug connector, a lower locking sleeve, a cooling air chamber and an underwater camera component are fixed to the upper side of the upper end cover and the lower side of the upper end cover through threaded connection respectively, and the upper end cover and lower end cover are connected with the organic glass cover through threads. A welding oscillator is clamped on the upper portion of a copper welding torch of a welding gun. According to the structure of a drainage sealing device, drainage felt and a felt skirt are arranged on the periphery of the lower end cover, and the drainage felt and the felt skirt are fastened on the lower end cover through hose clamps; the copper welding torch of the welding gun is fastened through an upper locking sleeve and the lower locking sleeve, the welding gun is inserted into the organic glass cover, and an elastic rubber leather sheath is arranged between the upper locking sleeve and the lower locking sleeve. The special portable miniature drainage cover for automatic underwater local dry-method welding has the advantages of being simple in structure, exquisite, convenient and fast to use, low in cost, obvious in drainage effect, and stable and reliable in welding process. Moreover, a connector with the quality of on-land welding is formed, the welding efficiency is improved and the special portable miniature drainage cover is easy to popularize.
Description
Technical field
The present invention relates to a kind of underwater welding equipment, the special-purpose Mini drain cap of especially a kind of portable underwater local dry cavity automatic welding.
Background technology
The ocean engineering underwater welding technology has become one of requisite key technology in current marine resources development and ocean engineering technology.Ocean engineering structure is at sea during one's term of military service due to the effect that is subject to external load, can produce damage and performance loss in various degree, as clash into defect, corrosion and fatigue crackle etc., cause the decay of ocean engineering drag, all need to be safeguarded incessantly, repair during making these marine structures in-service, can move safely and reliably to guarantee structure.
At present, countries in the world are just of a great variety at the underwater welding method of application and research, and applying more ripe is arc welding.The maximum characteristics of wet method welding are that simple equipments, construction are flexible, low price, but the wet method Underwater Welding still seldom arrives welding point preferably, therefore can't be for welding important offshore engineering structure.Dry method welding equipment complexity, operating expenses is high, and the cycle is long, and the joint form of its adaptation is limited.Therefore, find a kind of both simple and flexible, can obtain again the underwater welding method of quality weld, become the main target of China's Underwater Welding research.
Local dry-type welding is that the water that with gas, will weld partial zones arranges artificially, forms a less gas phase zone, makes the welding method of electric arc smooth combustion therein.With hyperbaric welding, compare, local dry-type is without the draining air chamber of large-scale costliness, and adaptability obviously increases.Because it has reduced the adverse effect of water, quality of weld joint is had clear improvement than the wet method welding.It combines the advantage of wet type and dry type, has both had advantages of the WET WELDING simple and flexible, can as the dry type welding, obtain quality weld again, and simultaneously because equipment is simple, cost is lower, is therefore very promising underwater welding method.
As far back as the eighties, the domestic Kazakhstan weldering local draining CO under water that just developed
2semi-automatic welding, obtained quality weld seam preferably, and successfully carried out the reparation of offshore engineering structure, and weak point is that welding engineering needs a large amount of CO
2gas, and drainage cover is larger, inconvenient operation, in addition, drainage cover is connected with diver's helmet, has limited diver's flexibility.Underwater Welding seminar of South China Science & Engineering University successfully develops the flux-cored wire welding equipment of local dry cavity under water and the technique of a set of employing Mini drain cap, but its operation is substantially in blind weldering state, can't observe welding arc and Molten Pool Shape, more can't realize the swing of welding gun, and weld the existence that arc zone when initial has water, affect welding quality.The partial dry type automatic welding drainage arrangement of Beijing Institute of Petrochemical Technology's invention, adopt Underwater Welding camera and automatic shading electric-welding lens, realized first automatic welding, welding gun and cover body are to flexibly connect, can't realize stably swinging regularly, welding gun structure is too simple, affect welding arc stablility, and the seal that sealing gasket and rubber skirt form is not easy to realize drainage effect preferably when groove welding or larger fillet welding, can't guarantee the stability of welding process, the consumption of draining gas is still very large.
At present, the local dry cavity automatic soldering method part that still comes with some shortcomings under water: (1) can not get rid of the impact of welding fume well, reduces the camera shooting quality.(2) when carrying out groove welding or larger fillet welding, can't guarantee that welding region does not have water, affects welding quality.(3) because cooling velocity is too fast, molten bath is difficult for sprawling, and easily causes the defects such as incomplete fusion between welding bead and mother metal or welding bead.(4) drainage cover is oversize, can't arrive less REPAIR WELDING zone, space, and then can't repair.(5) consumption of draining gas is very large, need to carry a large amount of gas bombs.
Summary of the invention
For above-mentioned the deficiencies in the prior art part, the invention provides the special-purpose Mini drain cap of a kind of portable underwater local dry cavity automatic welding, the water that will weld partial zones with gas arranges, form a less gas phase zone, make electric arc smooth combustion therein, realize reliable and stable welding process and form the joint that approaches land welding quality.This device uses common land solid core welding wire or flux-cored wire just can carry out Underwater Welding, and in welding process, water surface staff can know and sees arc burning process and Molten Pool Shape.This device can be used for muddy water environment or the lower underwater environment of visibility and the welding of adverse circumstances, as underwater environments such as water velocity is large, intense radiations, can carry out the welding such as built-up welding, fillet welding, groove welding.
For achieving the above object, the technical solution used in the present invention is to provide the special-purpose Mini drain cap of a kind of portable underwater local dry cavity automatic welding, and wherein: this drainage cover includes draining cover body, welding gun, underwater camera assembly, welding oscillator and drainage sealing device;
Described draining cover body includes upper end cover, plexiglass tent, bottom end cover, be threaded connection supporting rod, air inlet quick connector, lower lock sleeve, calm air chamber, underwater camera assembly are separately fixed at the upper and lower side of upper end cover, and upper end cover, bottom end cover are connected with plexiglass tent by screw thread;
Described welding gun includes copper welding torch, the air nozzle connected successively, ignition tip; The clamping of copper welding torch top has welding oscillator;
The structure of described drainage sealing device is to be provided with the draining felt in the bottom end cover periphery, and at the periphery cover of draining felt, the felt skirt is arranged, and by the larynx hoop, draining draining felt, felt skirt is fastened on bottom end cover; The copper welding torch of welding gun is fastening by upper lock sleeve, lower lock sleeve, and welding gun is inserted in plexiglass tent, between upper lock sleeve, lower lock sleeve, is provided with the elastic caoutchouc leather sheath.
Effect of the present invention is that the present invention is simple in structure, and exquisite convenient, cost is lower, and drainage effect is remarkable, and welding process is reliable and stable, forms the joint that approaches land welding quality and has improved welding efficiency, is easy to promote.The present invention clamps and drives welding torch by welding oscillator, realize that welding gun swings along seam direction left and right straight line reciprocation type, improves appearance of weld and enhances productivity, and prevents the generation of incomplete inter-run fusion.Wherein amplitude of fluctuation (± 8mm), swing speed (0-2300mm/min), swing the left time of staying (0-2s), swing in the middle of the time of staying (0-2s) and the swing right time of staying (0-2s) can set separately.The present invention adopts Underwater Welding camera and automatic sensitization welding lens, can realize the visual of welding process, before weldering and postwelding without the dismounting optical filter; Adopt cold light source to be thrown light on, adopt laser pen to carry out welding bead centering, guarantee the accurate location of welding bead.Air admission hole of the present invention adopts quick connector, has guaranteed seal and has repeatedly plugged flexibility.Adopt the laminar flow intake method in drainage cover, scatter with can making the draining gas uniform, in cover, sustained height place throughput equates, will cover maritime interior waters integral body to pressing down and discharging, and can not produce disturbance to electric arc.The present invention, by changing the retaining part of wig-wag to welding torch, realizes the free adjustment of welding gun stem elongation; Can realize that welding is leaned forward, backward welding, meet the welding procedure needs.Bottom end cover of the present invention outside cover one felt, and overlap again a felt skirt in the outside of felt, with the larynx hoop, draining felt, felt group are fixed on bottom end cover again, make the air pressure in cover and cover outer hydraulic pressure in dynamic equilibrium state, make gas become tiny bubble steadily to escape simultaneously, stop that the outer water of cover can not enter in cover thereby reach, drainage cover inner form stable without aqua region.And felt is high temperature resistant, is difficult for scaling loss, long service life.Draining cover body of the present invention can cover welding point fully, itself and water are isolated, get rid of the adverse effect of water environment to welding process stability, and reduce the Seam and heat effected zone cooling velocity, reduce in tissue the percentage of the martensitic phase that hardens, improve property of welded joint.
The accompanying drawing explanation
Fig. 1 is general structure cross-sectional schematic of the present invention.
In figure;
1. 4. times lock sleeve 5. upper end covers of lock sleeve 3. rubber sleave on welding oscillator 2.
6. the calm air chamber of supporting rod 7. quick plug 8. weld assembly Shang Xia 9.
10. lucite cover body 11. copper welding torch 12. air nozzle 13. ignition tips
14. bottom end cover 15. draining felt 16. felt skirt 17. larynx hoops
The specific embodiment
Reaching by reference to the accompanying drawings embodiment is illustrated the special-purpose Mini drain cap structure of portable underwater local dry cavity automatic welding of the present invention.
The design philosophy of the special-purpose Mini drain cap of portable underwater local dry cavity automatic welding of the present invention is that the water that with gas, will weld partial zones arranges, form a less gas phase zone, make electric arc smooth combustion therein, realize reliable and stable welding process and form the joint that approaches land welding quality.This device uses common land solid core welding wire or flux-cored wire just can carry out Underwater Welding, and in welding process, water surface staff can know and sees arc burning process and Molten Pool Shape.This device can be used for muddy water environment or the lower underwater environment of visibility and the welding of adverse circumstances, as underwater environments such as water velocity is large, intense radiations, can carry out the welding such as built-up welding, fillet welding, groove welding.
As shown in Figure 1, the special-purpose Mini drain cap structure of portable underwater local dry cavity automatic welding of the present invention is that this drainage cover includes draining cover body, welding gun, underwater camera assembly 9, welding oscillator 1 and drainage sealing device;
Described draining cover body includes upper end cover 5, plexiglass tent 10, bottom end cover 14, be threaded connection supporting rod 6, air inlet quick connector 7, lower lock sleeve 4, calm air chamber 8, underwater camera assembly 9 are separately fixed at the upper and lower side of upper end cover 14, and upper end cover 5, bottom end cover 14 are connected with plexiglass tent 10 by screw thread.
Described welding gun includes copper welding torch 11, the air nozzle 12 connected successively, ignition tip 13; The 11 top clampings of copper welding torch have welding oscillator 1.The external control box of described welding oscillator 1 is controlled, thereby realizes multi-form swing.The supporting rod 6 of described draining cover body upper end cover 5 can be connected with the welding walking mechanism with welding oscillator 1.
The structure of described drainage sealing device is to be provided with draining felt 15 in bottom end cover 14 peripheries, and at the periphery cover of draining felt 15, felt skirt 16 is arranged, and by larynx hoop 17, draining draining felt 15, felt skirt 16 is fastened on bottom end cover 14; The copper welding torch 11 of welding gun is fastening by upper lock sleeve 2, lower lock sleeve 4, and welding gun is inserted in plexiglass tent 10, between upper lock sleeve 2, lower lock sleeve 4, is provided with elastic caoutchouc leather sheath 3.Described draining felt 15 can, according to the welding work pieces groove type, change shape.
Described underwater camera assembly 9 includes underwater camera head, automatic sensitization welding lens, cold light source and laser pen.Described underwater camera head possesses automatic focusing function, coordinates automatic sensitization welding lens, realizes that welding is visual.
The special-purpose Mini drain cap function of portable underwater local dry cavity automatic welding of the present invention is achieved in that
As shown in Figure 1, after the special-purpose Mini drain cap of portable underwater local dry cavity automatic welding is installed, before entering water, first the protective gas in logical welding gun, prevent that the sealing backflow enters welding gun, affects welding quality.After arriving welding position, fix this drainage cover, in gas bomb, draining gas enters calm air chamber by quick connector, enter this drainage cover with layer flow mode, the drainage cover internal water accumulation is discharged gently, observe the cover internal water accumulation by underwater camera assembly 9 and whether discharge thoroughly, can increase throughput in case of necessity.
After weld preparation work is ready, adjust welding condition, shield gas flow rate, welding gun inclination angle, stem elongation etc. are set, can be welded.The vapor phase areas internal combustion of welding arc in this drainage cover; steam and welding fume that protective gas, draining gas, water vapor produce are more and more; pressure in cover also increases thereupon; drainage arrangement contacts with workpiece; draining felt 15, felt skirt 16 effect as same " one-way cocks ", only allow the gas in cover to discharge, but the outer water of this drainage cover can not enter welding region; maintain stable vapor phase areas and welding region in this drainage cover, guarantee the stable of welding process.
Underwater camera assembly 9 adopts cold light sources illumination, camera automatically to regulate that aperture is focused and sensitization electric welding photo automatically, guarantees shooting quality.Underwater camera assembly 9 gathers welding image and is transported to multi-function console waterborne by transmission cable, and the control personnel, according to these video informations, adjust welding condition by welding control system, realizes the remote monitoring to this drainage cover.If in cover, weld fumes is more, while affecting the underwater photograph technical quality, can increase the draining gas flow, welding fume is discharged, then return to former setting value.
Claims (2)
1. the special-purpose Mini drain cap of a portable underwater local dry cavity automatic welding, it is characterized in that: this drainage cover includes draining cover body, welding gun, underwater camera assembly (9), welding oscillator (1) and drainage sealing device;
Described draining cover body includes upper end cover (5), plexiglass tent (10), bottom end cover (14), be threaded connection supporting rod (6), air inlet quick connector (7), lower lock sleeve (4), calm air chamber (8), underwater camera assembly (9) are separately fixed at the upper and lower side of upper end cover (14), and upper end cover (5), bottom end cover (14) are connected with plexiglass tent (10) by screw thread;
Described welding gun includes copper welding torch (11), the air nozzle (12) connected successively, ignition tip (13); The clamping of copper welding torch (11) top has welding oscillator (1);
The structure of described drainage sealing device is to be provided with draining felt (15) in bottom end cover (14) periphery, and at the periphery cover of draining felt (15), felt skirt (16) is arranged, and by larynx hoop (17), draining draining felt (15), felt skirt (16) are fastened on bottom end cover (14); The copper welding torch (11) of welding gun is fastening by upper lock sleeve (2), lower lock sleeve (4), and welding gun is inserted in plexiglass tent (10), is provided with elastic caoutchouc leather sheath (3) cover between upper lock sleeve (2), lower lock sleeve (4).
2. the special-purpose Mini drain cap of portable underwater local dry cavity automatic welding according to claim 1 is characterized in that: described underwater camera assembly (9) includes underwater camera head, sensitization welding lens, cold light source and laser pen automatically.
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|---|---|---|---|
| CN201310362777.8A CN103433606B (en) | 2013-08-19 | 2013-08-19 | The special Mini drain cap of portable underwater local dry cavity automatic welding |
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|---|---|---|---|
| CN201310362777.8A CN103433606B (en) | 2013-08-19 | 2013-08-19 | The special Mini drain cap of portable underwater local dry cavity automatic welding |
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| CN103433606A true CN103433606A (en) | 2013-12-11 |
| CN103433606B CN103433606B (en) | 2016-03-02 |
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| CN103521919A (en) * | 2013-10-15 | 2014-01-22 | 江苏大学 | Combination device capable of achieving underwater laser welding and laser shot blasting |
| CN104722973A (en) * | 2015-02-03 | 2015-06-24 | 华南理工大学 | Local dry type drainage device for underwater welding robot and drainage method thereof |
| CN105014234A (en) * | 2014-04-25 | 2015-11-04 | 天津大学 | Underwater friction stitch welding local dry method small draining device |
| CN105014233A (en) * | 2014-04-25 | 2015-11-04 | 天津大学 | Draining device for underwater friction stitch welding |
| CN105758861A (en) * | 2014-12-16 | 2016-07-13 | 山东德瑞防腐材料有限公司 | Draining cover of underwater video installation for sacrificial anode |
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| CN104722973A (en) * | 2015-02-03 | 2015-06-24 | 华南理工大学 | Local dry type drainage device for underwater welding robot and drainage method thereof |
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