CN103722036B - A kind of nuclear power super pipeline ozzle draw device and method - Google Patents
A kind of nuclear power super pipeline ozzle draw device and method Download PDFInfo
- Publication number
- CN103722036B CN103722036B CN201310691632.2A CN201310691632A CN103722036B CN 103722036 B CN103722036 B CN 103722036B CN 201310691632 A CN201310691632 A CN 201310691632A CN 103722036 B CN103722036 B CN 103722036B
- Authority
- CN
- China
- Prior art keywords
- ozzle
- nuclear power
- matched moulds
- lifting arm
- mould
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 4
- 239000000498 cooling water Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 claims description 3
- 238000010297 mechanical methods and process Methods 0.000 claims description 3
- 230000005226 mechanical processes and functions Effects 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 4
- 238000005474 detonation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
A kind of nuclear power super pipeline ozzle draw device and method, for solving the technical problem of draw ozzle on nuclear power super pipeline.It comprises base platform, drawing mould, rotary flame heating arrangements, rotary drive mechanism, lifting arm, hoist cylinder and PLC system, described base platform is fixed on level ground, in base platform side, drawing mould is installed, at its opposite side fixed installation hoist cylinder, the telescopic arm of described hoist cylinder is connected with lifting arm, described lifting arm is inverted " L " type structure, and its end is positioned at above drawing mould, installs rotary flame heating arrangements at the end of lifting arm.The present invention not only achieves Automated condtrol, reduces operator's labour intensity, improves operating condition, and improve production efficiency, ensure that product quality.
Description
Technical field
The present invention relates to a kind of pipeline ozzle draw device and draw method, especially a kind of nuclear power super pipeline ozzle draw device and method, belongs to steel pipe processing technique field.
Background technology
Nuclear power super pipeline is the important component part of nuclear power station main steam line, because it is connected with safety valve, therefore needs to arrange ozzle on tube wall.For meeting Nuclear piping designing requirement, super pipeline top fitting should with female pipe global formation, to ensure the continuous of pipeline and ozzle material internal fibr tissue.
Traditional nuclear power super pipeline ozzle processing adopt first prefabricated ozzle, again by the mode that ozzle weld with conduit component main body, so not only technique is loaded down with trivial details, but also because of weld seam cause product use limited with service life the problem such as short.Although part producing enterprise have employed draw moulding process at present, by heating tubing, utilize mould to extrude and make tubing local produce plastic deformation, thus the ozzle meeting dimensional requirement is obtained on tubing parent, but in prior art, owing to adopting the overall mode of heating of tubing, not only operator's labour intensity is large, inefficiency, and also will reconditioning work be carried out after nozzle molding, cause the waste of the energy.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of and realize automatic control, operator's labour intensity can be reduced, ensure the nuclear power super pipeline ozzle draw device and method of product quality.
Problem of the present invention realizes with following technical proposals:
A kind of nuclear power super pipeline ozzle draw device, it comprises base platform, drawing mould, rotary flame heating arrangements, rotary drive mechanism, lifting arm, hoist cylinder and PLC system, described base platform is fixed on level ground, in base platform side, drawing mould is installed, at its opposite side fixed installation hoist cylinder, the telescopic arm of described hoist cylinder is connected with lifting arm, described lifting arm is inverted " L " type structure, its end is positioned at above drawing mould, installs rotary flame heating arrangements at lifting arm end.
Above-mentioned nuclear power super pipeline ozzle draw device, described rotary flame heating arrangements comprises swivel nozzle seat, nozzle and nozzle cooling water cover, heat-insulation layer is provided with outside described swivel nozzle seat, swivel nozzle seat is cavity structure, its internal cavities is communicated with fuel gas pipeline and oxygen pipeline, swivel nozzle seat one end is assembled by thrust bearing and lifting arm, at the uniform one group of nozzle of its other end, described nozzle ejection end arranges nozzle cooling water cover, described nozzle cooling water cover and cooling water system pipeline connection.
Above-mentioned nuclear power super pipeline ozzle draw device, described rotary drive mechanism comprises motor and belt drive component, described motor is fixed on lifting arm, and its output shaft and belt drive component driving pulley assemble, and described belt drive component driven pulley and swivel nozzle seat are fixed and assembled.
Above-mentioned nuclear power super pipeline ozzle draw device, described drawing mould comprises outer matched moulds, internal mold, ejects mould, ejection cylinder and sliding bottom, described outer matched moulds is two-piece unit formula structure, matched moulds top arranges the opening mated with internal mold outside, described internal mold sidewall and ozzle outer wall form fit, it is assembled by pin and outer matched moulds, described in eject mould and be fixed on ejection cylinder telescopic arm, eject the outer contour curved surface of mould to mate with ozzle inner wall shape, described ejection cylinder is fixed on sliding bottom.
Above-mentioned nuclear power super pipeline ozzle draw device, the action of described rotary flame heating arrangements, rotary drive mechanism and hoist cylinder controls by PLC system.
A kind of nuclear power super pipeline ozzle draw method, it passes through tubing local heat, and utilize drawing mould extrude tubes to make its local produce plastic deformation, thus obtain the ozzle meeting dimensional requirement on tubing parent, its operating procedure is as follows:
A, the latter half of outer matched moulds is fixed on the side of base platform, tubing workpiece is placed in outer matched moulds the latter half cavity, outer matched moulds the first half and outer matched moulds the latter half are assembled;
B, ejection cylinder is fixed on sliding bottom, installs on the top of ejection cylinder telescopic arm and eject mould, sliding bottom is sent in tubing workpiece lumen, and fix at setting position;
C, internal mold is put into outer matched moulds opening and fix with pin;
D, control hoist cylinder action by PLC system, the distance at rotary flame heating arrangements and tubing workpiece heat position is met design requirement, and then controls rotary flame heating arrangements, rotary drive mechanism and water cooling system work by PLC system;
E, after tubing workpiece heat position reaches technological requirement temperature, control the telescopic arm of ejection cylinder by PLC system and stretch out, drive and eject mould and move upward, tubing workpiece forms ozzle.
Above-mentioned nuclear power super pipeline ozzle draw method, on tubing workpiece, offer fabrication hole in advance in advance, the aperture of described fabrication hole meets drawing dimensional requirement.
Above-mentioned nuclear power super pipeline ozzle draw method, after described ozzle draw is shaping, carries out mechanical process.
Nuclear power super pipeline ozzle draw device of the present invention drives nozzle to rotate by rotary drive mechanism, ensure that tubing workpiece deformation position thermally equivalent; Nuclear power super pipeline ozzle draw device of the present invention is provided with hoist cylinder and lifting arm on base, by hoist cylinder action meet flame and workpiece deformation position distance adjust requirement; Nuclear power super pipeline ozzle draw device of the present invention arranges nozzle cooling water cover in the bottom of nozzle, is cooled nozzle by water cooling system, and the tempering detonation phenomenon that efficiently avoid nozzle occurs; Nuclear power super pipeline ozzle draw method of the present invention utilizes nuclear power super pipeline ozzle draw device, the action of rotary flame heating arrangements, rotary drive mechanism and hoist cylinder is controlled by PLC system, and by the cooperation of mould, effectively ensure that the precision of nozzle molding.In a word, the present invention not only achieves Automated condtrol, reduces operator's labour intensity, improves operating condition, and improve production efficiency, ensure that product quality.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is nuclear power super pipeline ozzle draw apparatus structure schematic diagram;
Fig. 2 ~ Fig. 5 is nuclear power super pipeline ozzle process of tube plug drawing mill schematic diagram.
In figure, each list of reference numerals is: 1, base platform, 2, sliding bottom, 3, ejection cylinder, 4, outer matched moulds, 5, internal mold, 6, pin, 7, tubing workpiece, 7-1, fabrication hole, 8, mould is ejected, 9, nozzle cooling water cover, 10, nozzle, 11, belt, 12, driven pulley, 13, lifting arm, 14, driving pulley, 15, motor, 16, hoist cylinder, 17, swivel nozzle seat, 18, thrust bearing, 19, heat-insulation layer.
Detailed description of the invention
Referring to Fig. 1, the present invention includes base platform 1, drawing mould, rotary flame heating arrangements, rotary drive mechanism, lifting arm 13, hoist cylinder 16 and PLC system, described base platform 1 is fixed on level ground, in the side of base platform 1, drawing mould is installed, at its opposite side fixed installation hoist cylinder 16, the telescopic arm of described hoist cylinder 16 is connected with lifting arm 13, described lifting arm 13 is inverted " L " type structure, its end is positioned at above drawing mould, installs rotary flame heating arrangements at the end of lifting arm 13; Described rotary flame heating arrangements comprises swivel nozzle seat 17, nozzle 10 and nozzle cooling water cover 9, heat-insulation layer 19 is provided with outside described swivel nozzle seat 17, swivel nozzle seat 17 is cavity structure, its internal cavities is communicated with fuel gas pipeline and oxygen pipeline, swivel nozzle seat 17 one end is assembled by thrust bearing 18 and lifting arm 13, at the uniform one group of nozzle 10 of its other end, nozzle cooling water cover 9 is set, described nozzle cooling water cover 9 and cooling water system pipeline connection bottom described nozzle 10; Described rotary drive mechanism comprises motor 15 and belt drive component, described motor 15 is fixed on lifting arm 13, its output shaft and belt drive component driving pulley 14 assemble, described belt drive component driven pulley 12 assembles with swivel nozzle seat 17 is fixing, and the belt 11 of belt drive component assembles with driving pulley 14 and driven pulley 12; Described drawing mould comprises outer matched moulds 4, internal mold 5, ejects mould 8, ejection cylinder 3 and sliding bottom 2, described outer matched moulds 4 is two-piece unit formula structure, matched moulds 4 top arranges the opening mated with internal mold outside, described internal mold 5 sidewall and ozzle outer wall form fit, it is assembled by pin 6 and outer matched moulds 4, the described mould 8 that ejects is fixed on the telescopic arm of ejection cylinder 3, and eject the outer contour curved surface of mould 8 and mate with ozzle inner wall shape, described ejection cylinder 3 is fixed on sliding bottom 2.
Referring to Fig. 2 ~ Fig. 5, a kind of nuclear power super pipeline ozzle draw method, it, by tubing local heat, utilizes drawing mould extrude tubes workpiece 7 to make its local produce plastic deformation, thus obtain the ozzle meeting dimensional requirement on tubing parent.Its operating process is: on tubing workpiece 7, offer fabrication hole 7-1 in advance in advance, and the aperture of described fabrication hole 7-1 meets drawing dimensional requirement, then operates in the steps below,
A, the latter half of outer matched moulds 4 is fixed on the side of base platform 1, tubing workpiece 7 is placed in outer matched moulds 4 the latter half cavity, outer matched moulds 4 the first half and outer matched moulds 4 the latter half are assembled;
B, ejection cylinder 3 is fixed on sliding bottom 2, installs on the top of ejection cylinder 3 telescopic arm and eject mould 8, sliding bottom 2 is sent in tubing workpiece 7 inner chamber, and fix at setting position;
C, internal mold 5 is put into outer matched moulds 4 opening and fix with pin 6;
D, control hoist cylinder 16 action by PLC system, the distance making rotary flame heating arrangements and tubing workpiece 7 heat position meets design requirement, and then controls rotary flame heating arrangements, rotary drive mechanism and water cooling system work by PLC system;
E, after tubing workpiece heat position reaches technological requirement temperature, control the telescopic arm of ejection cylinder 3 by PLC system and stretch out, drive and eject mould 8 and move upward, tubing workpiece 7 forms ozzle.
After ozzle draw is shaping, carry out mechanical process.
Referring to Fig. 1 ~ Fig. 5, the present invention drives nozzle 10 to rotate by rotary drive mechanism, ensure that tubing workpiece 7 is out of shape position thermally equivalent; The present invention is provided with hoist cylinder 16 and lifting arm 13 in base platform 1, by hoist cylinder 16 action meet flame and workpiece deformation position distance adjust requirement; The present invention arranges nozzle cooling water cover 9 in the bottom of nozzle 10, cooled nozzle 10 by water cooling system, and the tempering detonation phenomenon that efficiently avoid nozzle occurs; The present invention, by the accurate Calculation to die size, fully ensures the precision of nozzle molding.
Claims (7)
1. a nuclear power super pipeline ozzle draw device, it is characterized in that, it comprises base platform (1), drawing mould, rotary flame heating arrangements, rotary drive mechanism, lifting arm (13), hoist cylinder (16) and PLC system, described base platform (1) is fixed on level ground, in base platform (1) side, drawing mould is installed, at its opposite side fixed installation hoist cylinder (16), the telescopic arm of described hoist cylinder (16) is connected with lifting arm (13), described lifting arm (13) is inverted " L " type structure, its end is positioned at above drawing mould, at the end of lifting arm (13), rotary flame heating arrangements is installed,
Described rotary flame heating arrangements comprises swivel nozzle seat (17), nozzle (10) and nozzle cooling water cover (9), described swivel nozzle seat (17) outside is provided with heat-insulation layer (19), swivel nozzle seat (17) is cavity structure, its internal cavities is communicated with fuel gas pipeline and oxygen pipeline, swivel nozzle seat (17) one end is assembled by thrust bearing (18) and lifting arm (13), the uniform one group of nozzle (10) of its other end, described nozzle (10) bottom arranges nozzle cooling water cover (9), described nozzle cooling water cover (9) and cooling water system pipeline connection.
2. a kind of nuclear power super pipeline ozzle draw device according to claim 1, it is characterized in that, described rotary drive mechanism comprises motor (15) and belt drive component, described motor (15) is fixed on lifting arm (13), its output shaft and belt drive component driving pulley (14) assemble, and described belt drive component driven pulley (12) is assembled with swivel nozzle seat (17) is fixing.
3. a kind of nuclear power super pipeline ozzle draw device according to claim 2, it is characterized in that, described drawing mould comprises outer matched moulds (4), internal mold (5), eject mould (8), ejection cylinder (3) and sliding bottom (2), described outer matched moulds (4) is two-piece unit formula structure, it mates with tubing workpiece (7), matched moulds (4) top arranges the opening mated with internal mold outside, described internal mold (5) sidewall and ozzle outer wall form fit, it is assembled by pin (6) and outer matched moulds (4), the described mould (8) that ejects is fixed on the telescopic arm of ejection cylinder (3), the outer contour curved surface ejecting mould (8) mates with ozzle inner wall shape, described ejection cylinder (3) is fixed on sliding bottom (2).
4. a kind of nuclear power super pipeline ozzle draw device according to claim 3, it is characterized in that, the action of described rotary flame heating arrangements, rotary drive mechanism and hoist cylinder (16) controls by PLC system.
5. a nuclear power super pipeline ozzle draw method, is characterized in that, it passes through tubing local heat, and utilize drawing mould extrude tubes to make its local produce plastic deformation, thus obtain the ozzle meeting dimensional requirement on tubing parent, its operating procedure is as follows:
A, the latter half of outer matched moulds (4) is fixed on the side of base platform (1), tubing workpiece (7) is placed in outer matched moulds the latter half cavity, outer matched moulds the first half and outer matched moulds the latter half are assembled;
B, ejection cylinder (3) is fixed on sliding bottom (2), installs on the top of ejection cylinder (3) telescopic arm and eject mould (8), sliding bottom (2) is sent in the inner chamber of tubing workpiece (7), and fix at setting position;
C, internal mold (5) is put into outer matched moulds (4) opening and with pin (6) fix;
D, control hoist cylinder (16) action by PLC system, the distance making rotary flame heating arrangements and tubing workpiece (7) heat position meets design requirement, and then controls rotary flame heating arrangements, rotary drive mechanism and water cooling system work by PLC system;
E, after tubing workpiece heat position reaches technological requirement temperature, the telescopic arm being controlled ejection cylinder (3) by PLC system stretches out, and drives to eject mould (8) and move upward, and tubing workpiece (7) forms ozzle.
6. a kind of nuclear power super pipeline ozzle draw method according to claim 5, it is characterized in that, on tubing workpiece (7), offer fabrication hole (7-1) in advance in advance, the aperture of described fabrication hole (7-1) meets drawing dimensional requirement.
7. a kind of nuclear power super pipeline ozzle draw method according to claim 6, is characterized in that, after described ozzle draw is shaping, carry out mechanical process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691632.2A CN103722036B (en) | 2013-12-17 | 2013-12-17 | A kind of nuclear power super pipeline ozzle draw device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310691632.2A CN103722036B (en) | 2013-12-17 | 2013-12-17 | A kind of nuclear power super pipeline ozzle draw device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103722036A CN103722036A (en) | 2014-04-16 |
| CN103722036B true CN103722036B (en) | 2016-02-03 |
Family
ID=50446467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310691632.2A Active CN103722036B (en) | 2013-12-17 | 2013-12-17 | A kind of nuclear power super pipeline ozzle draw device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103722036B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269949B (en) * | 2016-08-13 | 2018-03-13 | 江苏标新工业有限公司 | A kind of manufacturing process of the big small-bore pipeline ozzle of super 60mm wall thickness |
| CN108044084A (en) * | 2018-01-16 | 2018-05-18 | 福建亚亨机械股份有限公司 | The heating arrangements of highly automated adjusting in bus-bar automatic forming equipment |
| CN113579143A (en) * | 2021-07-30 | 2021-11-02 | 贵州航天新力科技有限公司 | Forming die and forming method for tube nozzle of tube body with tube nozzle |
| CN115301751B (en) * | 2022-10-11 | 2022-12-27 | 江苏新恒基特种装备股份有限公司 | Method and device for measuring wall thickness of branch pipe and imaging bulge position of multi-branch pipe |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111029A (en) * | 1976-01-09 | 1978-09-05 | Creusot-Loire | Manufacture of pipe stubs in walls of very great thickness |
| CN101767172A (en) * | 2009-12-31 | 2010-07-07 | 武汉重工铸锻有限责任公司 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
| CN201702935U (en) * | 2010-06-28 | 2011-01-12 | 江阴桦林高压管件制造有限公司 | Hot extrusion type hydraulic formation device for collecting tube |
| CN102794329A (en) * | 2012-08-31 | 2012-11-28 | 渤海重工管道有限公司 | Manufacturing equipment for nozzle of main steam super pipeline of nuclear power and pulling and extrusion manufacturing process for nozzle |
-
2013
- 2013-12-17 CN CN201310691632.2A patent/CN103722036B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4111029A (en) * | 1976-01-09 | 1978-09-05 | Creusot-Loire | Manufacture of pipe stubs in walls of very great thickness |
| CN101767172A (en) * | 2009-12-31 | 2010-07-07 | 武汉重工铸锻有限责任公司 | Hot extrusion molding method for pipe nozzle of main steam super pipeline |
| CN201702935U (en) * | 2010-06-28 | 2011-01-12 | 江阴桦林高压管件制造有限公司 | Hot extrusion type hydraulic formation device for collecting tube |
| CN102794329A (en) * | 2012-08-31 | 2012-11-28 | 渤海重工管道有限公司 | Manufacturing equipment for nozzle of main steam super pipeline of nuclear power and pulling and extrusion manufacturing process for nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103722036A (en) | 2014-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103722036B (en) | A kind of nuclear power super pipeline ozzle draw device and method | |
| CN103191945A (en) | Method and device for high-pressure hydraulic flange plasticity forming | |
| CN100448644C (en) | One-step injection forming and valcanizing equipment and method for screw pump (screw drilling tool) stator rubber bush | |
| CN208495709U (en) | A kind of foaming and forming apparatus of the white mould of evaporative pattern | |
| CN207222670U (en) | A kind of reducing abnormity pipe part expanding die | |
| CN117124638A (en) | Hot-press forming device | |
| CN116728720A (en) | Quick fashioned swimming goggles injection mold | |
| CN116197386A (en) | Mechanical part casting system of processing | |
| CN102744820B (en) | Dual-inflating structure of work arm of rotational molding machine | |
| CN115230104A (en) | A shell injection molding machine equipment for household electrical appliances are made | |
| CN201524908U (en) | Metal forming equipment with compound spinning and hot extrusion action | |
| CN102514200A (en) | Hot extrusion and cold compression forming method of plastic inspection well | |
| CN110560624B (en) | Automatic forging production unit of steering rocker shaft | |
| CN204249293U (en) | The injection moulding apparatus at the end in injection moulding | |
| CN2910533Y (en) | One-step injection moulding vulcanizer for rubber bushing of stator of screw pump | |
| CN102950720B (en) | Plastic package stator runner-free mold | |
| CN208853501U (en) | A kind of stamping device | |
| CN102729385B (en) | Single air-inflation structure for working arm of rotational moulding machine | |
| CN110918925A (en) | Aluminum alloy casting equipment and casting process thereof | |
| CN210061729U (en) | Guide type positioning device for plastic forming die | |
| CN104707989B (en) | Automatic motor casing assembly line | |
| CN220180005U (en) | Mould with oblique top subassembly | |
| CN219634591U (en) | Tire vulcanization mold and tire vulcanization processing device | |
| CN202727201U (en) | Double-aeration L-shaped arm of rotational moulding machine | |
| CN218196792U (en) | Novel cooling device for injection molding of mold |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 061300 Yanshan County Industrial Development Zone, Hebei Applicant after: HEBEI HONGRUN NUCLEAR EQUIPMENT SCIENCE AND TECHNOLOGY Co.,Ltd. Address before: 061300 Cangzhou City, Hebei province Yanshan County Pu wacheng Industrial Zone No. 6 Applicant before: HEBEI HONGRUN HEAVY INDUSTRY GROUP CO.,LTD. |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20231012 Granted publication date: 20160203 |
|
| PP01 | Preservation of patent right |