CN202763261U - Box type underwater welding wire feed device - Google Patents
Box type underwater welding wire feed device Download PDFInfo
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- CN202763261U CN202763261U CN 201220393544 CN201220393544U CN202763261U CN 202763261 U CN202763261 U CN 202763261U CN 201220393544 CN201220393544 CN 201220393544 CN 201220393544 U CN201220393544 U CN 201220393544U CN 202763261 U CN202763261 U CN 202763261U
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Abstract
The utility model provides a box type underwater welding wire feed device. A base plate is arranged in the box body, a box cover is arranged on the position of an opening at the upper end of the box body, and a connector and a vision window are arranged on the side wall of the box body. A replacement opening of welding wires is arranged on the box cover. A cover body is arranged on the replacement opening of the welding wires. A wire reel, a straightening mechanism, and a wire feed mechanism are arranged on the upper side of the base plate. A speed reducer and a motor are arranged on the lower side of the base plate. The input end of the motor is connected with a power source and the output end of the motor is connected with the speed reducer. A gear is arranged on the output end of the speed reducer and connected with a gear of a wire feed roller of the wire feed mechanism in a meshing mode. The wire feed roller of the wire feed mechanism can be driven to be rotated. According to the box type underwater welding wire feed device, welding can be carried out on the position of 60 meters of underwater. High pressure carbon dioxide is filled in the inner portion of the box type underwater welding wire feed device. The high pressure carbon dioxide balances inner and outer pressure of the box body, at the same time the motor can be air-cooled, and served as shielding gas of the welding. The wire feed device is stabilized in running and welding quality is effectively guaranteed.
Description
Technical field
The utility model relates to welding equipment, relates in particular to a kind of box Underwater Welding wire feeding device.
Background technology
The ocean engineering underwater welding technology has become one of requisite key technology in current marine resources development and the ocean engineering technology.Ocean engineering structure is at sea during one's term of military service owing to being subject to the effect of external load, can produce in various degree damage and performance loss, as clash into defective, corrosion and fatigue crackle etc., cause the decay of ocean engineering drag, so that these marine structures all need to safeguard incessantly, repair during using as a servant, can move safely and reliably to guarantee structure.Up to the present, in the underwater welding method of having studied and having used, the maximum characteristics of wet method welding are that simple equipments, construction are flexible, low price, but its efficient is low.Dry method welding equipment is complicated, and operating expenses is high, and the cycle is long, and the joint form of its adaptation is limited.No matter be wet method or dry method Underwater Welding, all because its unsurmountable shortcoming, and greatly affected their applicability to day by day complicated ocean structure.Therefore, seek 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.
The method of flux-cored wire semi-automatic welding under water is a kind of new underwater welding method of Recent study, and the wire-feed motor of the welding of medicine core self-shield under water then is to realize a key equipment of this technology.The underwater sliver carrying box that prior art is applied to Underwater Welding is that wire feeder is installed in the casing of sealing, by constantly in case, being filled with air, so that the case internal pressure is higher than hydrostatic pressure, thereby reach the waterproof purpose, but still there is series of problems in it: 1, the thread seal mode selected of prior art, run into welding wire and carry the blocking-up situation, the diving welder dismantles inconvenience, wastes a large amount of weld intervals; 2, the air that is filled with in the case enters the welding gun zone by wire convey soft pipe, produces additional bubbles near electric arc, and the arc zone visibility reduces, and causes welding quality to reduce.Therefore, still be further improved.
The utility model content
Main purpose of the present utility model is to overcome the above-mentioned shortcoming that existing product exists; and provide a kind of box Underwater Welding wire feeding device; it welds 60 meters dark positions under water; and the inner high-pressure carbon dioxide that is filled with at the balance box external and internal pressure simultaneously; also can play the air cooling effect to motor; and can be used as protection-gas welding, and make wire feeding device stable, effectively guarantee welding quality.
The purpose of this utility model is realized by following technical scheme.
The box Underwater Welding wire feeding device of the utility model is characterized in that, is provided with base plate 11 in its casing 1, casing 1 upper end open place is provided with case lid 12, casing 1 sidewall is provided with interface and form 13, and this case lid 12 is provided with welding wire replacement port 121, and this welding wire replacement port 121 is provided with lid 122; These base plate 11 upsides are provided with wire reel 2, aligning mechanism 3 and wire feeder 4, and base plate 11 bottom sides are provided with reductor 41 and motor 42, these motor 42 inputs are connected with power supply, motor 42 outputs are connected with reductor 41, the output of reductor 41 is provided with gear 43, and be connected with the wire pushing roller engaged gears of wire feeder, the wire pushing roller that drives wire feeder rotates.
Aforesaid box Underwater Welding wire feeding device, wherein casing 1 is bolted and seals by sealing ring with case lid 12.
Aforesaid box Underwater Welding wire feeding device, wherein welding wire replacement port 121 locks and seals by sealing ring by lid snap ring 18 and case lid snap ring 19 with lid 122.
Aforesaid box Underwater Welding wire feeding device, wherein 1 four side wall inner surface of casing are welded with respectively a boss 14, and each boss 14 is provided with screw; This base plate 11 adopts high-density polyethylene material to make, base plate 11 is placed on four boss, its four limit and the corresponding position of boss 14 screws are respectively equipped with screw, screw tight with nut after 4 screw rods of confession pass respectively boss and base plate 11 screws, and base plate 11 is fixed on the boss 14.
Aforesaid box Underwater Welding wire feeding device; wherein casing 1 sidewall is provided with three interfaces; these three interfaces are respectively relief valve interface 15, submerged cable/snorkel ingress interface 16 and welding wire/protection gas/cable outlet interface 17; these three interfaces 15,16,17 places are provided with respectively flange, pass through rubber seal between flange and the interface.
Aforesaid box Underwater Welding wire feeding device, wherein wire feeder comprises wire pushing roller 44, wire pushing roller axle 45, reductor 41, motor 42 and reductor output gear 43, wire pushing roller 44 and wire pushing roller axle 45 are two groups, every group is provided with two wire pushing rollers 44 and two wire pushing roller axles 45, this wire pushing roller 44 is set in respectively on the wire pushing roller axle 45, four wire pushing roller axles 45 are fixed with base plate respectively, this wire pushing roller 44 is between any two by self engaged gears, motor 42 inputs that base plate 11 bottom sides arrange are connected with power supply, motor 42 outputs are connected with reductor 41, the output of reductor 41 passes base plate 11 and is provided with gear 43, this gear 43 is connected with wherein each engaged gears of two groups of wire pushing rollers, rotates for driving wire pushing roller 44.
Aforesaid box Underwater Welding wire feeding device, wherein aligning mechanism comprises that a contact roller 31, a compression wheel shaft, an adjusting screw(rod) 32, two straightening- wheels 33 and 34, two alignment wheel shafts of two alignment wheel shafts are vertical with base plate plane respectively with an axis that compresses wheel shaft; The subpoint of axle center on base plate of two straightening-wheels 33 and a contact roller 31 is triangularly arranged, and two alignment wheel shafts 34 are separately fixed at base plate 11 end faces, and two straightening-wheels 33 are set in respectively on the alignment wheel shaft 34; This contact roller 31 is set in and compresses on the wheel shaft, and the compression wheel shaft is provided with screw thread one end and is embedded on the corner structure 35, and the other end is the free end that is provided with the reducing shoulder, the contact roller 31 that is set on the compression wheel shaft is stuck in by the reducing shoulder compresses on the wheel shaft; These adjusting screw(rod) 32 1 ends are provided with adjusting nut, and the other end screws tight on corner structure 35 after passing the support plate 36 that is located at plate top surface.When needs are regulated contact roller, unclamp the locking nut between adjusting screw(rod) 32 and support plate 36 and the corner structure 35, and turn adjusting nut, thereby the drive contact roller moves ahead or retreats, and changes the distance of shaft centers between contact roller and two straightening-wheels, makes welding wire produce different plastic deformations, thereby change the alignment degree of welding wire, after adjustment is complete, tighten locking nut, finish the thrust operation.
Aforesaid box Underwater Welding wire feeding device, wherein wire reel 2 comprises welding wire disk body, wire reel axle 21, welding wire 23 and wire reel shaft end buckle 22, wherein welding wire 23 is coiled on the welding wire disk body, the welding wire disk body is set on the wire reel axle 21, and wire reel shaft end buckle 22 chuckings by preventing that the welding wire disk body from coming off; Wire reel axle 21 is fixed on base plate 11 end faces.
The beneficial effect of the box Underwater Welding wire feeding device of the utility model, this box Underwater Welding wire feeding device under water 60 meters dark positions welds, the one, wire reel is arranged on the base plate with wire feeder, and be arranged at box house, this wire feeding device can be placed near the welding position, needn't be from water surface wire feed to 60 meter under water.Tank wall can bear 60 atmospheric pressure, thereby guarantees that it is at 60 meters trouble free services under water.Wire feeding device inside is filled with high-pressure carbon dioxide, and this high-pressure carbon dioxide gas can also play the air cooling effect to motor, and can be used as protection-gas welding in the balance box external and internal pressure, makes wire feeding device stable, effectively guarantees welding quality.
Description of drawings:
Fig. 1 is the box Underwater Welding wire feeding device of the utility model overall structure schematic diagram.
Major label description in figure:
1 casing; 11 base plates; 12 case lids; 121 welding wire replacement ports; 122 welding wire replacement port lids; 13 forms; 14 boss; 15 relief valve interfaces; 16 submerged cables/snorkel ingress interface; 17 welding wires/protection gas/cable outlet interface; 18 lid snap rings; 19 case lid snap rings; 2 wire reels; 21 wire reel axles; 22 buckles; 23 welding wires; 3 aligning mechanisms; 31 contact rollers; 32 adjusting screw(rod)s; 33; straightening-wheel; 34 alignment wheel shafts; 35 corner structures; 36 support plates; 4 wire feeders; 41 reductors; 42 motors, 43 reductor output gears; 44 wire pushing rollers; 45 wire pushing roller axles.
The specific embodiment
As shown in Figure 1, the box Underwater Welding wire feeding device of the utility model is provided with base plate 11 in its casing 1, casing 1 upper end open place is provided with case lid 12, casing 1 sidewall is provided with interface and form 13, and this case lid 12 is provided with welding wire replacement port 121, and this welding wire replacement port 121 is provided with lid 122; These base plate 11 upsides are provided with wire reel 2, aligning mechanism 3 and wire feeder 4, and base plate 11 bottom sides are provided with reductor 41 and motor 42, these motor 42 inputs are connected with power supply, motor 42 outputs are connected with reductor 41, the output of reductor 41 is provided with gear 43, and be connected with the wire pushing roller engaged gears of wire feeder, the wire pushing roller that drives wire feeder rotates.
As shown in Figure 1, the box Underwater Welding wire feeding device of the utility model, wherein, this casing 1 is bolted and seals by sealing ring with case lid 12.This welding wire replacement port 121 locks and seals by sealing ring by lid snap ring 18 and case lid snap ring 19 with lid 122.1 four side wall inner surface of this casing are welded with respectively a boss 14, and each boss 14 is provided with screw; This base plate 11 adopts high-density polyethylene material to make, base plate 11 is placed on four boss, its four limit and the corresponding position of boss 14 screws are respectively equipped with screw, screw tight with nut after 4 screw rods of confession pass respectively boss and base plate 11 screws, and base plate 11 is fixed on the boss 14.This casing 1 sidewall is provided with three interfaces; these three interfaces are respectively relief valve interface 15, submerged cable/snorkel ingress interface 16 and welding wire/protection gas/cable outlet interface 17; these three interfaces 15,16,17 places are provided with respectively flange, pass through rubber seal between flange and the interface.This wire feeder 4 comprises wire pushing roller 44, wire pushing roller axle 45, reductor 41, motor 42 and reductor output gear 43, wire pushing roller 44 and wire pushing roller axle 45 are two groups, every group is provided with two wire pushing rollers 44 and two wire pushing roller axles 45, this wire pushing roller 44 is set in respectively on the wire pushing roller axle 45, four wire pushing roller axles 45 are fixed with base plate respectively, this wire pushing roller 44 is between any two by self engaged gears, motor 42 inputs that base plate 11 bottom sides arrange are connected with power supply, motor 42 outputs are connected with reductor 41, the output of reductor 41 passes base plate 11 and is provided with gear 43, this gear 43 is connected with wherein each engaged gears of two groups of wire pushing rollers, rotates for driving wire pushing roller 44.This aligning mechanism 3 comprises that a contact roller 31, a compression wheel shaft, an adjusting screw(rod) 32, two straightening- wheels 33 and 34, two alignment wheel shafts of two alignment wheel shafts are vertical with base plate plane respectively with an axis that compresses wheel shaft; The subpoint of axle center on base plate of two straightening-wheels 33 and a contact roller 31 is triangularly arranged, and two alignment wheel shafts 34 are separately fixed at base plate 11 end faces, and two straightening-wheels 33 are set in respectively on the alignment wheel shaft 34; This contact roller 31 is set in and compresses on the wheel shaft, and the compression wheel shaft is provided with screw thread one end and is embedded on the corner structure 35, and the other end is the free end that is provided with the reducing shoulder, the contact roller 31 that is set on the compression wheel shaft is stuck in by the reducing shoulder compresses on the wheel shaft; These adjusting screw(rod) 32 1 ends are provided with adjusting nut, and the other end screws tight on corner structure 35 after passing the support plate 36 that is located at plate top surface.When needs are regulated contact roller, unclamp the locking nut between adjusting screw(rod) 32 and support plate 36 and the corner structure 35, and turn adjusting nut, thereby the drive contact roller moves ahead or retreats, and changes the distance of shaft centers between contact roller and two straightening-wheels, makes welding wire produce different plastic deformations, thereby change the alignment degree of welding wire, after adjustment is complete, tighten locking nut, finish the thrust operation.This wire reel 2 comprises welding wire disk body, wire reel axle 21, welding wire 23 and wire reel shaft end buckle 22, wherein welding wire 23 is coiled on the welding wire disk body, the welding wire disk body is set on the wire reel axle 21, and wire reel shaft end buckle 22 chuckings by preventing that the welding wire disk body from coming off; Wire reel axle 21 is fixed on base plate 11 end faces.
Embodiment:
Before this Underwater Welding wire-feed motor entry, with water surface dioxide bottle valve open, begin to supply gas first, guarantee that the welding gun end has bubble to emerge always after this Underwater Welding wire-feed motor entry, illustrate that water does not enter in the wire convey soft pipe.After diver welder is in place, open the key of supplying gas on the welding gun, gas will connect the snorkel of establishing by welding wire/protection gas/cable outlet interface 17 places and enter torch neck, reaches the purpose of carrying protection gas.Diver welder can observe the operation of wire-feed motor internal mechanism and welding wire residue situation by observation window 13, when the welding wire surplus is not enough, stops welding, wire-feed motor is carried to more than the water surface, close gas cylinder valve, open relief valve, discharge the interior gas pressure of casing to atmospheric pressure state.Open the snap ring between lid and the case lid, and open welding wire replacement port lid 122, change welding wire, changes complete after, welding wire replacement port lid is loaded onto, and the snap ring between locked lid and the case lid, continue to weld to welding place.
After welding finishes, this Underwater Welding wire-feed motor is risen to more than the water surface, close gas cylinder valve, open relief valve, discharge the interior gas pressure of casing to atmospheric pressure state.
The operation principle of the box Underwater Welding wire feeding device of the utility model:
Welding wire replacement port and welding wire replacement port lid are designed to the revotating card compact form, and the welding wire replacement port covers and is provided with handle, convenient disassembly.The case lid buckle is designed to ramp type, can regulate case lid and compress degree, enhanced leaktightness effect.Welding wire is changed lid and case lid is provided with the locking snap ring, after assurance welding wire replacing lid is tightened, can not leak because of rotation.
Be provided with the base plate fixing lug boss in the casing, guarantee that base plate is simultaneously fixing, reduce the box sealing point.Base plate adopts high-density polyethylene material, and quality is light, and intensity is high, and can make motor and seal case insulation.The casing transparent window can be convenient to situation and welding wire surplus in diver's inspection box.The front inside of entry work passes into first high-pressure carbon dioxide gas, not only as the equalizing pressure medium but also can guarantee to protect the purity of gas, can prevent that sealing enters wire convey soft pipe from ignition tip simultaneously, and can play to motor the effect of air cooling.
The convenient wire feeding disc welding wire surplus of observing of transparent window on the casing.Transparent window uses organic resistance to compression glass, adopts the rubber seal structure between itself and the casing.Wire feeder adopts four roller wire feed structures, and wherein two pair rollers compress welding wire, when guaranteeing wire feeding force, reduces the thrust of pair of rollers welding wire, is convenient to send to soft wire, is more suitable in sending flux-cored wire to.Waterproof machine adopts servo direct current motor, and shell adopts 316L stainless steel material water-tight, and good heat dissipation, efficient are high, firm, antirust."O"-ring is installed between motor output end axle and the shell carries out movable sealing.Reducing gear adopts the worm and gear gear drive.
After being coiled in the welding wire process straightening-wheel alignment on the small-sized wire reel, through being installed in the four rolling wire feeder on the speed reducer output shaft, deliver to welding gun finally by crossing wire convey soft pipe again.Protection gas arrives torch neck by seal box, wireway.
This is special-purpose wire-feed motor under water, and lower water conservancy project will pass into carbon dioxide before doing, and regulates loading pressure according to lower water depth, prevents the wire convey soft pipe water inlet.Logical carbon dioxide arrive the leak holes of ignition tip by wire feed seal box, seal wire flexible pipe.
Advantage of the present utility model and effect:
1, case lid special design welding wire replacement port and rotary clamping type welding wire are changed lid, can be convenient for changing welding wire.
2, welding wire replacement port and welding wire are changed lid and are designed to the revotating card compact form, and fastening, withstand voltage, the welding wire replacement port covers and is provided with handle, convenient disassembly.The case lid card is designed to ramp type, can regulate case lid and compress degree, enhanced leaktightness effect.Welding wire is changed lid and case lid is provided with the locking snap ring, after assurance welding wire replacing lid is tightened, can not leak because of rotation.
3, the transparent window of casing makes things convenient for situation and residue welding wire amount in diver's inspection box.
4, carbon dioxide as protection gas, be the active gases of unique suitable welding, and cost was low both.Can be used as again the medium of equalizing pressure, can also play to motor the effect of air cooling simultaneously.
The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment does.
Claims (8)
1. box Underwater Welding wire feeding device, it is characterized in that, be provided with base plate (11) in its casing (1), casing (1) upper end open place is provided with case lid (12), casing (1) sidewall is provided with interface and form (13), this case lid (12) is provided with welding wire replacement port (121), and this welding wire replacement port (121) is provided with lid (122); This base plate (11) upside is provided with wire reel (2), aligning mechanism (3) and wire feeder (4), and base plate (11) bottom side is provided with reductor (41) and motor (42), this motor (42) input is connected with power supply, motor (42) output is connected with reductor (41), the output of reductor (41) is provided with gear (43), and be connected with the wire pushing roller engaged gears of wire feeder, the wire pushing roller that drives wire feeder rotates.
2. box Underwater Welding wire feeding device according to claim 1 is characterized in that, described casing (1) is bolted and seals by sealing ring with case lid (12).
3. box Underwater Welding wire feeding device according to claim 1 is characterized in that, described welding wire replacement port (121) locks and seals by sealing ring by lid snap ring (18) and case lid snap ring (19) with lid (122).
4. box Underwater Welding wire feeding device according to claim 1 is characterized in that, (1) four side wall inner surface of described casing is welded with respectively a boss (14), and each boss (14) is provided with screw; This base plate (11) adopts high-density polyethylene material to make, base plate (11) is placed on four boss, its four limit and the corresponding position of boss (14) screw are respectively equipped with screw, screw tight with nut after supplying 4 screw rods to pass respectively boss and base plate (11) screw, base plate (11) is fixed on the boss (14).
5. box Underwater Welding wire feeding device according to claim 1; it is characterized in that; described casing (1) sidewall is provided with three interfaces; these three interfaces are respectively relief valve interface (15), submerged cable/snorkel ingress interface (16) and welding wire/protection gas/cable outlet interface (17); these three interfaces (15,16,17) locate to be provided with respectively flange, pass through rubber seal between flange and the interface.
6. box Underwater Welding wire feeding device according to claim 1, it is characterized in that, described wire feeder comprises wire pushing roller (44), wire pushing roller axle (45), reductor (41), motor (42) and reductor output gear (43), wire pushing roller (44) and wire pushing roller axle (45) are two groups, every group is provided with two wire pushing rollers (44) and two wire pushing roller axles (45), this wire pushing roller (44) is set in respectively on the wire pushing roller axle (45), four wire pushing roller axles (45) are fixed with base plate respectively, this wire pushing roller (44) is between any two by self engaged gears, motor (42) input that base plate (11) bottom side arranges is connected with power supply, motor (42) output is connected with reductor (41), the output of reductor (41) passes base plate (11) and is provided with gear (43), this gear (43) is connected with wherein each engaged gears of two groups of wire pushing rollers, rotates for driving wire pushing roller (44).
7. box Underwater Welding wire feeding device according to claim 1, it is characterized in that, described aligning mechanism comprises a contact roller (31), compression wheel shaft, an adjusting screw(rod) (32), two straightening-wheels (33) and two alignment wheel shafts (34), and two alignment wheel shafts are vertical with base plate plane respectively with an axis that compresses wheel shaft; Two straightening-wheels (33) are triangularly arranged with the subpoint of axle center on base plate of a contact roller (31), and two alignment wheel shafts (34) are separately fixed at base plate (11) end face, and two straightening-wheels (33) are set in respectively on the alignment wheel shaft (34); This contact roller (31) is set in and compresses on the wheel shaft, the compression wheel shaft is provided with screw thread one end and is embedded on the corner structure (35), the other end is the free end that is provided with the reducing shoulder, the contact roller (31) that is set on the compression wheel shaft is stuck in by the reducing shoulder compresses on the wheel shaft; These adjusting screw(rod) (32) one ends are provided with adjusting nut, and the other end screws tight on corner structure (35) after passing the support plate (36) that is located at plate top surface.
8. box Underwater Welding wire feeding device according to claim 1, it is characterized in that, described wire reel (2) comprises welding wire disk body, wire reel axle (21), welding wire (23) and wire reel shaft end buckle (22), wherein welding wire (23) is coiled on the welding wire disk body, the welding wire disk body is enclosed within on the wire reel axle (21), and wire reel shaft end buckle (22) chucking by preventing that the welding wire disk body from coming off; Wire reel axle (21) is fixed on base plate (11) end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393544 CN202763261U (en) | 2012-08-09 | 2012-08-09 | Box type underwater welding wire feed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220393544 CN202763261U (en) | 2012-08-09 | 2012-08-09 | Box type underwater welding wire feed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202763261U true CN202763261U (en) | 2013-03-06 |
Family
ID=47769860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220393544 Expired - Lifetime CN202763261U (en) | 2012-08-09 | 2012-08-09 | Box type underwater welding wire feed device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202763261U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273172A (en) * | 2013-05-16 | 2013-09-04 | 哈尔滨工业大学 | Underwater wet process welding wire feeding mechanism of flux-cored wire |
| CN107127427A (en) * | 2017-06-12 | 2017-09-05 | 华南理工大学 | The hermetically sealed automatic welding wire-feed motor under water of lightweight |
| CN110202259A (en) * | 2019-04-23 | 2019-09-06 | 安徽科技学院 | Underwater laser increases material prosthetic device |
-
2012
- 2012-08-09 CN CN 201220393544 patent/CN202763261U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103273172A (en) * | 2013-05-16 | 2013-09-04 | 哈尔滨工业大学 | Underwater wet process welding wire feeding mechanism of flux-cored wire |
| CN107127427A (en) * | 2017-06-12 | 2017-09-05 | 华南理工大学 | The hermetically sealed automatic welding wire-feed motor under water of lightweight |
| CN110202259A (en) * | 2019-04-23 | 2019-09-06 | 安徽科技学院 | Underwater laser increases material prosthetic device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee before: OFFSHORE OIL ENGINEERING Co.,Ltd. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |