CN108817618A - A kind of underwater wet welding device that can adaptively regulate and control bubble and technique - Google Patents
A kind of underwater wet welding device that can adaptively regulate and control bubble and technique Download PDFInfo
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- CN108817618A CN108817618A CN201810683644.3A CN201810683644A CN108817618A CN 108817618 A CN108817618 A CN 108817618A CN 201810683644 A CN201810683644 A CN 201810683644A CN 108817618 A CN108817618 A CN 108817618A
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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
- B23K9/323—Combined coupling means, e.g. gas, electricity, water or the like
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention belongs to underwater welding technology fields, the underwater wet welding device and technique of bubble can adaptively be regulated and controled more particularly to one kind, the device is made of welder and the bubble regulation device being sleeved on the outside of welder, the bubble regulation device is made of the gas storehouse being sleeved on the outside of welder and the snorkel being connected to below gas storehouse, the gas storehouse is annular, and by even partition be several small gas storehouses, individual air inlet pipeline is respectively connected in each small gas storehouse；Using the welder of this structure, it is supplied gas when welding by gas storehouse and forms an individual arc column region bubble in welding position, and the quality of welding can be substantially increased to provide a more stable environment for Underwater Welding with the size that environment adjusts bubble.
Description
Technical field
The invention belongs to Underwater Welding field of engineering technology, and in particular to one kind can adaptively regulate and control the underwater wet process of bubble
Welder and technique.
Background technique
Underwater wet welding (flux-cored arc welding, FCAW) has and facilitates operation, high efficiency, low
Many advantages, such as cost and high quality is one of important development direction of Underwater Welding.In the welding process, welding wire and workpiece
It is placed directly in water, arc burning is mainly constantly being occurred to be thermally decomposed, evaporated or reacted the bubble formed by gas-forming agent and water
Interior progress.There are this ratios with dry method welding, due to persistently influencing each other between arc zone and water environment, underwater wet combustion
Size, the internal pressure in space are all continually changing, while the big temperature gradient in bubble, complicated gas component, rapid cooling
Under the action of the factors such as condition, chemically and physically work that the arc zone for causing it internal is persistently mutually coupled, complicated
With.Complex environment makes underwater bubble have conclusive effect for the forming of underwater wet process in this way.
The current welding procedure of underwater wet process obtains high quality, and reliable weld seam is not easy to.Important equipment still according to
Rely in high-pressure dry process.But the cost of hyperbaric chamber allows people to hang back again.It is significant effectively to promote water how in limited cost
The quality of lower welding and control the dream that cost is each underwater researcher.
Chinese patent document " 103433606 A of notification number CN ", discloses a kind of portable underwater local dry cavity automatic welding
Dedicated Mini drain cap.The principle of the device is：Drainage cover after the installation is completed, will be in drainage cover with gas is drained in storage cylinder
Ponding excludes, and drainage cover felt, felt skirt plays " one-way cock ", prevents the reverse irrigation of water.Entire welding is set in the invention
In protective gas, water environment is significantly reduced to the adverse effect of welding process.It could not be very but still remain some problems
It is good to solve.For example, flatness of the drainage cover for workpiece, shape have relatively high requirement, the list of drainage cover just can guarantee
To aeration.The workpiece needs of corresponding specific shape re-work and select corresponding drainage cover.In addition, outstanding on welding bead direction
It is how the welding bead that molten bath rear portion is formed effectively prevents the forming for not hampering welding bead while water immersion drainage cover again, text
In there is no relevant introduction.This hampers other scholars to a certain extent and Underwater Welding staff reappears in patent out
The effect.
Chinese patent document " notification number CN 2458117Y ", discloses a kind of submersible welding miniature draining device.The patent
Cardinal principle is as follows, the vapor of the gas and water vapor that are generated using solder wire material itself, will be in this miniature draining device cover
Water arrange, form the anhydrous domains of a part, electric arc burns in the anhydrous domains, gas and vaporization with generation
Vapor increases, and intracavitary pressure is increasing, and when pressure is greater than periphery hydraulic pressure, intracavitary water is discharged by gasket.With
Welding carry out, the high temperature scaling loss gasket of weld seam simultaneously forms cavity, so that weld seam is unlikely to carry out in water immediately.The device fills
Divide the production gas using flux for flux-cored wire, does not need logical protection gas, it is relatively inexpensive.But it still remains some problems to need further
It improves.For example, the drainage cover also has relatively high requirement for the flatness of workpiece, different workpieces shape needs to design processing
Dedicated drainage cover, to guarantee the normal work of drainage cover.Secondly, gasket is directly contacted with welding bead, weldering may be oppressed
Road affects appearance of weld, and may bring slag inclusion into, is unfavorable for obtaining excellent weldquality.Finally, relying on welding wire merely
With evaporation generate gas make gas production less reliable, when in gas hood water be discharged it is more after, the evaporation of vapor is with regard to corresponding
Reduce, the wave zone of gas yield carrys out the fluctuation of pressure, influences the unidirectional water preventing ability of gasket.
U.S. patent documents " welding torch for underwater welding ", the water curtain type Underwater Welding side
Method sprays high-pressure water jet from welding gun outer layer in cone, forms the high cascade of stiffness, stops the intrusion of water, and welding gun internal layer is logical
Enter to protect gas, the water immediately below welding gun is arranged, is to protect gas that can form the meteorological cavity in stable part, welding in cascade
Electric arc not by the interference of water, stablizes burning, there are three benefit 1, isolation external water and internal gas for cascade in water；2, it will escape out
Atmosphere race be broken into minute bubbles, be cavity pressure fluctuation it is smaller, keep stablize；3, the swabbing action of the high-speed jet of water is yes
The water of welding region is extracted out, and gas phase cavity is formed.The patent preferably prevents the invasion of water on welding bead direction while also reducing
Obstruction to figuration of bead.But still remain some places having much room for improvement.1, visibility problems solve not enough, high speed water
Stream accelerates the diffusion of flue dust in water so that water is muddy and disorder, welder are substantially at blind weldering.2, nozzle is from weldment surface
Distance and gradient require it is stringent, along with workpiece has reflex for high pressure water flow so that this kind of method applicable situation by
Limit.Underwater wet process manual metal-arc welding, since welder wears diving dress, activity is difficult, as a consequence it is hardly possible to carry out with this device corresponding
Welding.3, device is larger, and the ancillary equipment needed is more, and flexibility is inadequate.
Still there is the patent of many relevant local dry cavities, still remains some common shortcomings in summary.1, it fills
It sets complex, it is desirable that higher, the ancillary equipment needed is more, causes overall volume larger, can not for limited space region
It plays a role well.2, the effect of the universal deficiency of the protection of drainage cover, welding gas region and water isolation is by reality
Workpiece shapes, the influence of workplace etc..Welding for base material in irregular shape, protecting effect are affected.3, it drains
Being completely dependent on extraneous gas makes the consumption of gas big, needs to carry a large amount of storage cylinder.4, drainage cover is along welding bead direction
On, especially molten bath rear portion in the forming for accomplishing neither to influence welding bead, and can prevent to have in the coordination of this two o'clock of the invasion of water
To further be promoted.5, the regulation of gas is not careful enough, can not be directed to changeable water environment, carries out quickly corresponding adjustment.
Therefore how to overcome defect existing for above-mentioned technology, a kind of better underwater wet welding technique and corresponding device are really provided
As this field urgent problem to be solved.
Summary of the invention
For many deficiencies of the existing technology, the present invention provides the underwater wet processes that one kind can adaptively regulate and control bubble
Welder and technique, which is made of welder and the bubble regulation device being sleeved on the outside of welder, described
Bubble regulation device is made of the gas storehouse being sleeved on the outside of welder and the snorkel being connected to below gas storehouse, the gas
Storehouse is annular, and is several small gas storehouses by even partition, is respectively connected with individual air inlet pipeline in each small gas storehouse；Using this
The welder of structure is supplied gas when welding by gas storehouse and forms an individual arc column region bubble in welding position, and can be with
The size that environment adjusts bubble substantially increases the quality of welding to provide a more stable environment for Underwater Welding.
Inventor has carried out corresponding research for underwater wet welding, as a result, it has been found that during Underwater Welding bubble body
Product is bigger, is more conducive to appearance of weld.During Underwater Welding, by increasing electrical parameter, thicker welding wire and adjustment are selected
Gas making ingredient, the maximum gauge of bubble continue growing above-mentioned ginseng up to 45mm or so, but when bubble reaches 45mm or so
Number, the promotion of bring bubble maximum gauge is with regard to unobvious, therefore in the case where not adding external device (ED), only by adjusting
Parameter is difficult to obtain the comparatively ideal bubble of size.Furthermore during Underwater Welding, due to various reasons, the direction of water flow, flow velocity
Variation inevitably occurs, also brings the variation of bubbling behaviour accordingly, affects bubble for the guarantor of welding process
Shield, if it is possible to carry out corresponding bubble regulation according to actual flow condition, bubble also can be more for the protection of appearance of weld
It is effective.
It is based on the studies above discovery, inventor provides a set of completely new device and technical solution to complete bubble
It is corresponding to adjust, so that it is as follows to provide a kind of completely new underwater wet welding technique：.
Inventor provides firstly a kind of underwater wet welding device that can adaptively regulate and control bubble, and specific structure is as follows：
The device is made of welder and the bubble regulation device being sleeved on the outside of welder, the bubble regulation
Device is made of the gas storehouse being sleeved on the outside of welder and the snorkel being connected to below gas storehouse, and the gas storehouse is ring
Shape, and be several small gas storehouses by even partition, individual air inlet pipeline is respectively connected in each small gas storehouse；Each small gas storehouse
Outer wall middle position be provided with pressure inductor, the control device of the pressure inductor and peripheral hardware connects, the control
Device processed controls the ventilatory capacity of each air inlet pipeline；
The control device is conventional pressure sensitive feedback device, and to control ventilatory capacity size；
It using the device of this structure, begins to be passed through protection gas before welding starts, after starting welding, at welding initial stage
It causes water evaporation to form primary bubble by gas-forming agent and welding heat, protects gas to continue through while maintaining welding at this time logical
Tracheae outlet is discharged below gas storehouse, since venting tube outlet is distributed in around welding gun in a ring, provides for bubble lasting
Tolerance supplement compensates for welding and itself leads to the problem of tolerance deficiency, the preferred purity 99.99% of protection gas of the present invention
Pure argon, since protection gas is passed through so that the welding surroundings in bubble are relatively stable, welding bead obtained is more uniform, compared with
The simple bubble welding bead quality generated using gas-forming agent it is more preferable；Another feature of the invention is exactly in each small gas storehouse
Outer wall middle position is provided with pressure inductor, and the water flow that can thus monitor different directions around welder at any time is big
Small, since water flow factor is to influence the principal element of Air Bubble Size, the insoluble prior art is exactly this de-stabilising effect
Factor, the present invention obtains different water flow size informations in real time by the way of pressure sensitive water flow, and passes through this information tune
The air inflow and ventilatory capacity of whole corresponding gas storehouse are offset water flow and are generated to bubble to change the ventilatory capacity on bubble different directions
Influence, the more anxious direction such as water flow, the pressure that bubble is subject to is bigger, needs to increase ventilatory capacity at this time and comes caused by low-key water flow
It influences, vice versa；Allow for that bubble is more stable in this way, provide a stable environment for welding, the quality of welding bead from
So effectively promoted.
The snorkel is in anti-L shape, and gas outlet is towards outside；The same circumference of gas storehouse is arranged in all snorkels
On；Two of them snorkel is directed toward in front of welding bead along welding bead directional spreding, a snorkel gas outlet, and in addition a snorkel refers to
To welding bead rear, and the snorkel is shorter in length than other snorkels；
After this design, the welder part on the inside of snorkel gas outlet is had been in stable environment, out
Then maintain the periphery of bubble continual and steady by the adjustment of ventilatory capacity on the outside of port, and due to the requirement of the welding bead direction of motion, one
As need to set up former and later two snorkels in welding bead side ensure weld traveling front-rear direction bubble stability, and due to
The molten bath generated in welding process needs the cooling formation in order to weld seam, and weld seam is higher than the substrate of welding, therefore is directed toward weldering
The snorkel at road rear is shorter in length than other snorkels, not hinder the formation of welding bead to be advisable；
The small gas storehouse number is unlimited, and number, which is subject to, to be circumferentially uniformly distributed, it is preferred to use 4 or 6
The design of a small gas storehouse, corresponding snorkel setting are same；Several snorkels can be set in each small gas storehouse, but be
Facilitate control ventilatory capacity that one snorkel is generally preferably only set；
Preferably, gas storehouse height is adjustable, specifically can be by adding on the position that welder is set with gas storehouse
The mode of shimming is realized, and cyclic annular gas storehouse can be set using welder center as the rotating device in the center of circle, in this way can root
According to the direction for needing to adjust snorkel in gas storehouse, the requirement of different Underwater Weldings is adapted to；Lock is also equipped on the rotating device
Tight device facilitates the positioning of annular gas storehouse.
In order to adapt to the needs of Underwater Welding, used snorkel is prepared using boron nitride material, just in this way may be used
To be resistant to the high temperature of Underwater Welding bubble portion, snorkel deformation is avoided to melt, while snorkel being avoided to do welding arc
It disturbs；The gas storehouse shell is prepared using fine aluminium, light and facilitate processing, while avoiding corrosion of the water to gas storehouse, excellent
The gas storehouse shell of choosing can also coat anti-corrosion and heat-resisting material, avoid bubble high temperature and the electrochemical corrosion shadow caused by gas storehouse
It rings；
The pressure sensor is connected by the control device of signal wire and peripheral hardware, facilitates the real-time Transmission of signal；
On the basis of above-mentioned apparatus, inventor further provides a kind of underwater wet process weldering that can adaptively regulate and control bubble
Technique is connect, specific step is as follows：
Step (1), welding preparation：Suitable air-breather is in the light of actual conditions selected, the number of gas pipeline is reasonably adjusted
Amount, the direction of corresponding gas outlet, the quantity in gas storage storehouse；Welder and gas storehouse suit are connected simultaneously；Used protection gas
Using the straight argon of purity 99.99%；
Step (2) needs to set welding parameter according to welding, adjusts weldering speed, welding current, and voltage prepares welding；
Step (3), basis estimate the width of welding bead, adjust the height of welding gun, and appendix is avoided to influence the forming of weld seam, it
The gas supply pipeline of each gas storehouse is connected respectively at gas source afterwards, opens corresponding control device, gas flow is adjusted, ventilates in advance
Start the welding of conventional subsea wet process after a period of time；In welding process, the ventilatory capacity of protection gas is adjusted at any time by control device,
Active control is carried out to the bubble in welding process；
Step (4) stops welding, stops ventilation after continuing the ventilation of holding certain time.
Using above-mentioned processing step, it can need to choose corresponding bubble regulation device according to different welding, it is ensured that
The bubble of formation can provide lasting stabilization welding surroundings for welding；
Protection gas of the present invention is the pure argon of purity 99.99%, this is because using other air etc.
After the protection gas in source, under the action of buoyancy, gas can float at once, be unable to maintain that the stabilization of bubble, and the use of argon gas
Drawbacks described above is then overcome well；Continue one end time of ventilating after stopping welding, provides the time for welding bead cooling, avoid
Directly removing protection gas bubble collapse water is caused directly contact welding bead leads to the decline of welding bead quality.
Actual flow condition progress corresponding bubble active control when the technique is according to welding, and flow condition
Detection is realized by the pressure inductor that the outer wall middle position of small gas storehouse is arranged, and is fed back to control device with this and adjusted ventilation
Amount；
In conclusion welder and the corresponding welding procedure of this structure of the present invention, are sent in welding by gas storehouse
Gas forms an individual arc column region bubble in welding position, and the size of bubble can be adjusted with water environment, to be water
Lower welding provides a more stable environment, substantially increases the quality of welding.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the underwater wet welding device that the present invention can adaptively regulate and control bubble；
Fig. 2 is the structure sectional view of A-A in Fig. 1；
Fig. 3 is the stereoscopic schematic diagram for the underwater wet welding device that the present invention can adaptively regulate and control bubble；
Fig. 4 is the weld seam comparison chart that the weld seam obtained using technique of the present invention and common process obtain；
It is compared by Fig. 4 it can be found that using device proposed by the present invention appearance of weld obtained uniform, with light water
Lower wet processing is compared, and welding bead is not in more apparent deviation, the symmetry of weld seam, and the uniformity all obtains preferably
It is promoted；
1 is welder in figure, and 2 be gas storehouse, and 3 be bubble, and 4 be welding bead, and 5 be snorkel, and 6 be pressure inductor, 7 for into
Air pipe, 8 be small gas storehouse, and 9 be substrate.
Specific embodiment
The specific embodiment of form by the following examples does further specifically above content of the invention
It is bright, but the range that this should not be interpreted as to the above-mentioned theme of the present invention is only limitted to example below.It is all to be based on above content of the present invention
The technology realized all belongs to the scope of the present invention.
Embodiment 1
A kind of underwater wet welding device that can adaptively regulate and control bubble and technique, specific structure are as follows：
The device is made of welder 1 and the bubble regulation device being sleeved on the outside of welder 1, the bubble tune
Control device is made of the snorkel 5 for being sleeved on the gas storehouse 2 in 1 outside of welder and being connected to below gas storehouse 2, the gas storehouse
2 be annular, and is several small gas storehouses 8 by even partition, and 8 are respectively connected with individual air inlet pipeline 7 in each small gas storehouse；It is described every
The outer wall middle position of a small gas storehouse 8 is provided with pressure inductor 6, the control device company of the pressure inductor and peripheral hardware
It connects, the control device controls the ventilatory capacity of each air inlet pipeline；
The control device is conventional pressure sensitive feedback device, to control ventilatory capacity size.
Embodiment 2
A kind of underwater wet welding device that can adaptively regulate and control bubble and technique, specific structure are as follows：
The device is made of welder and the bubble regulation device being sleeved on the outside of welder, the bubble regulation
Device is made of the gas storehouse being sleeved on the outside of welder and the snorkel being connected to below gas storehouse, and the gas storehouse is ring
Shape, and be several small gas storehouses by even partition, individual air inlet pipeline is respectively connected in each small gas storehouse；Each small gas storehouse
Outer wall middle position be provided with pressure inductor, the control device of the pressure inductor and peripheral hardware connects, the control
Device processed controls the ventilatory capacity of each air inlet pipeline；
The control device is conventional pressure sensitive feedback device, to control ventilatory capacity size；
The snorkel is in anti-L shape, and gas outlet is towards outside；The same circumference of gas storehouse is arranged in all snorkels
On；Two of them snorkel is directed toward in front of welding bead along welding bead directional spreding, a snorkel gas outlet, and in addition a snorkel refers to
To welding bead rear, and the snorkel is shorter in length than other snorkels；
The small gas storehouse number is 6；
Used snorkel is prepared using boron nitride material.
Embodiment 3
A kind of underwater wet welding technique that can adaptively regulate and control bubble, specific step is as follows：
Step (1), welding preparation：In the light of actual conditions select suitable air-breather.Reasonably adjust the number of gas pipeline
Amount, the direction of corresponding gas outlet, the quantity in gas storage storehouse；Welder and gas storehouse suit are connected simultaneously；Used protection gas
Using the straight argon of purity 99.99%；
Step (2) needs to set welding parameter according to welding, adjusts weldering speed, welding current, and voltage prepares welding；
Step (3), basis estimate the width of welding bead, adjust the height of welding gun, and appendix is avoided to influence the forming of weld seam, it
The gas supply pipeline of each gas storehouse is connected respectively at gas source afterwards, opens corresponding control device, gas flow is adjusted, ventilates in advance
Start the welding of conventional subsea wet process after a period of time；In welding process, the ventilatory capacity of protection gas is adjusted at any time by control device；
Step (4) stops welding, stops ventilation after continuing the ventilation of holding certain time；
Used protection gas is the pure argon of purity 99.99%；
Device employed in the present embodiment is device described in embodiment 2；
Weld seam picture obtained by Fig. 4 as shown in figure 4, compared it can be found that being obtained using device proposed by the present invention
The appearance of weld obtained is uniform, and compared with wet processing under light water, welding bead is not in more apparent deviation, pair of weld seam
Title property, the uniformity all obtains preferable promotion.
In addition to the technical solution that the above embodiment of the present invention is recorded, in the case where not changing subject invention design to this
Inventing the corresponding change made should all be included within protection scope of the present invention.
Claims (7)
1. the underwater wet welding device that one kind can adaptively regulate and control bubble, it is characterised in that：Specific structure is as follows：
The device is made of welder (1) and the bubble regulation device being sleeved on the outside of welder (1), the bubble tune
Control device is made of the gas storehouse (2) being sleeved on the outside of welder (1) and the snorkel (5) being connected to below gas storehouse (2), institute
The gas storehouse (2) stated is annular, and is several small gas storehouses (8) by even partition, in each small gas storehouse (8) be respectively connected with individually into
Air pipe (7)；The outer wall middle position of each small gas storehouse (8) is provided with pressure inductor (6), the pressure sensitive
The connection of the control device of device and peripheral hardware, the control device control the ventilatory capacity of each air inlet pipeline；
The snorkel (5) is in anti-L shape, and gas outlet is towards outside；Same circle of all snorkel settings in gas storehouse (2)
Zhou Shang.
2. the underwater wet welding device according to claim 1 that can adaptively regulate and control bubble, it is characterised in that：It is described logical
Two snorkels are directed toward in front of welding bead along welding bead directional spreding, a snorkel gas outlet in tracheae (5), in addition a snorkel
It is directed toward welding bead rear, and the snorkel is shorter in length than other snorkels.
3. the underwater wet welding device according to claim 1 that can adaptively regulate and control bubble, it is characterised in that：Described
Small gas storehouse number is 4 or 6.
4. the underwater wet welding device according to claim 1 that can adaptively regulate and control bubble, it is characterised in that：It is described logical
Tracheae is prepared using boron nitride material.
5. the underwater wet welding technique that one kind can adaptively regulate and control bubble, it is characterised in that：Specific step is as follows：
Step (1), welding preparation：Suitable air-breather is in the light of actual conditions selected, the quantity of gas pipeline is adjusted, corresponds to
The direction of port, the quantity in gas storage storehouse；Welder and gas storehouse suit are connected simultaneously；
Step (2) needs to set welding parameter according to welding, adjusts weldering speed, welding current, and voltage prepares welding；
Step (3), basis estimate the width of welding bead, adjust the height of welding gun, and appendix is avoided to influence the forming of weld seam, later will
The gas supply pipeline of each gas storehouse is connected respectively at gas source, opens corresponding control device, adjusts gas flow, in advance one section of ventilation
Start the welding of conventional subsea wet process after time；In welding process, the ventilatory capacity of protection gas, butt welding are adjusted at any time by control device
Bubble in termination process carries out active control；
Step (4) stops welding, stops ventilation after continuing the ventilation of holding certain time；
Used device is the underwater wet welding device described in claim 1 that can adaptively regulate and control bubble.
6. the underwater wet welding technique according to claim 5 that can adaptively regulate and control bubble, it is characterised in that：It is used
Protection gas use purity 99.99% pure argon.
7. the underwater wet welding technique according to claim 5 that can adaptively regulate and control bubble, it is characterised in that：Described
Actual flow condition carries out corresponding bubble active control when technique is according to welding.
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| CN201810683644.3A CN108817618B (en) | 2018-06-27 | 2018-06-27 | Underwater wet welding device and process capable of adaptively controlling bubbles |
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| CN201810683644.3A CN108817618B (en) | 2018-06-27 | 2018-06-27 | Underwater wet welding device and process capable of adaptively controlling bubbles |
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| CN108817618B CN108817618B (en) | 2020-06-19 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1532182A (en) * | 1976-03-05 | 1978-11-15 | Battelle Memorial Institute | Operations under water |
| JPS566782A (en) * | 1979-06-28 | 1981-01-23 | Agency Of Ind Science & Technol | Dry type underwater welding method and welding equipment |
| JPS5898505A (en) * | 1981-12-05 | 1983-06-11 | 大成建設株式会社 | Connection of hollow pipe on water |
| US5981896A (en) * | 1998-08-26 | 1999-11-09 | Electric Power Research Institute, Inc. | Apparatus and method for creating dry underwater welds |
| CN206561186U (en) * | 2017-01-20 | 2017-10-17 | 华南理工大学 | Double air flow structure local dry cavity underwater robots weld Mini drain cap |
| CN107775162A (en) * | 2017-10-31 | 2018-03-09 | 哈尔滨工业大学（威海） | Underwater wet welding bubble regulation device |
-
2018
- 2018-06-27 CN CN201810683644.3A patent/CN108817618B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1532182A (en) * | 1976-03-05 | 1978-11-15 | Battelle Memorial Institute | Operations under water |
| JPS566782A (en) * | 1979-06-28 | 1981-01-23 | Agency Of Ind Science & Technol | Dry type underwater welding method and welding equipment |
| JPS5898505A (en) * | 1981-12-05 | 1983-06-11 | 大成建設株式会社 | Connection of hollow pipe on water |
| US5981896A (en) * | 1998-08-26 | 1999-11-09 | Electric Power Research Institute, Inc. | Apparatus and method for creating dry underwater welds |
| CN206561186U (en) * | 2017-01-20 | 2017-10-17 | 华南理工大学 | Double air flow structure local dry cavity underwater robots weld Mini drain cap |
| CN107775162A (en) * | 2017-10-31 | 2018-03-09 | 哈尔滨工业大学（威海） | Underwater wet welding bubble regulation device |
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| Publication number | Publication date |
|---|---|
| CN108817618B (en) | 2020-06-19 |
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