CN107571117A - Marine diesel engine air valve and valve seat mating surface Ginding process - Google Patents
Marine diesel engine air valve and valve seat mating surface Ginding process Download PDFInfo
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- CN107571117A CN107571117A CN201710763386.5A CN201710763386A CN107571117A CN 107571117 A CN107571117 A CN 107571117A CN 201710763386 A CN201710763386 A CN 201710763386A CN 107571117 A CN107571117 A CN 107571117A
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- valve seat
- valve
- air valve
- mating surface
- chip
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- 230000013011 mating Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 15
- 230000008569 process Effects 0.000 title claims abstract description 14
- 238000010926 purge Methods 0.000 claims abstract description 8
- 230000003028 elevating effect Effects 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 11
- 241000486406 Trachea Species 0.000 claims description 2
- 238000010079 rubber tapping Methods 0.000 claims description 2
- 210000003437 trachea Anatomy 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 7
- 230000036541 health Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The present invention discloses a kind of marine diesel engine air valve with valve seat mating surface Ginding process, it is necessary to using a kind of lapping device, comprises the following steps：A, polish：To main ventilated inside gas pipe, the first turbine drives cam rotation, and cam will push the upper and lower slip of air valve opposite valve seat；B, purge：Main endotracheal gas is flowed into jet ring tube, and gas is injected between air valve and valve seat by shower nozzle, and friction chip is purged；C, except chip：Second turbine drives negative pressure blade to rotate, and negative pressure is formed at negative pressure blade, and chip is drawn into air scoop, and chip is flowed into filter along air scoop, and filter filter off removing to chip；Compared with prior art, this programme reduces the abrasion between air valve and valve seat mating surface by the setting of the second turbine, negative pressure blade and jet ring tube so that working environment is cleaner and tidier, ensure that the health of operating personnel.
Description
Technical field
The present invention relates to technical field of diesel engine production, specially marine diesel engine air valve and valve seat mating surface grinding side
Method.
Background technology
When boat diesel engine works, inlet and outlet valve seat is in the adverse circumstances of HTHP, still suffers from rushing for air valve
Load is hit, thus produces alternation mechanical stress and deformation, causes air valve and the contact surface of valve seat that relative displacement occurs, while in air valve
And valve base surface there is also the defects of abrasion, pit, indenture and slight crack, these defects destroy the sealing of air valve and valve seat
Property, it have impact on the normal operation of diesel engine.Therefore when to large-sized diesel machine overhauling, the reparation of inlet and outlet valve and valve seat is one
The very important work of item.
In order to ensure the sealing of air valve and valve seat, the mating surface of air valve and valve seat is ground.At present, for big
For type low speed marine diesel engine, because its air valve valve rod is longer (about 2000mm of 700mm mono- or so), weight is in 180-
350 Kg or so, typically cylinder head is placed on on fixed pivot support, utilizes lever principle, operating personnel's pedal lever
Master arm, the air valve valve rod for making to be connected with lever slave arm are freely fallen after raising certain altitude, realize matching somebody with somebody for air valve and valve seat
The grinding in conjunction face.But for above-mentioned lapping mode, it is necessary to which operating personnel work without cessation, the work for not only increasing operating personnel is strong
Degree, and as operating personnel work without cessation, operating personnel can be more and more tired, and the speed of polishing can be gradually slack-off so that
Operating efficiency greatly reduces.
In order to solve problem above, Chinese Patent Application No. is 201320869136.7 utility model patent, is disclosed
A kind of large ship diesel valve and valve seat mating surface Ginding process, it includes motor and reducing gear, cam drive machine
Structure, motor control mechanism and support frame, support frame are provided with base, support column and table top, and table top passes through hole provided with air valve valve rod,
Motor and reducing gear are arranged on base, and cam drive is arranged on the output shaft of motor and reducing gear.The program
When being ground to large-scale diesel engine air valve and valve seat mating surface, diesel engine cylinder head is first fixedly mounted on to the table top of support frame
On, then by diesel valve valve rod through the valve seat orifice on diesel engine cylinder head, outside the cam for making its end and cam drive
Contoured surface contacts, and when motor and reducing gear drive cam drive rotation, passes through cam outer surface and drives air valve valve
Bar moves upwards, is then fallen by the deadweight of air valve, is achieved in the grinding of air valve and valve seat mating surface.
Above scheme is realized air valve and beaten with the automation of valve seat mating surface by the setting of cam drive and motor
Mill, not only reduces the labor intensity of operating personnel, also improves operating efficiency, but this device still has problems with：
When air valve is ground with valve seat mating surface, the chip being ground will be dropped into valve seat or on table top, and chip can not be carried out clearly
Reason, one side chip will increase the abrasion between air valve and valve seat mating surface, even when air valve and valve seat mating surface act on
So that air valve indenture occurs with valve seat mating surface, one side chip is slid on table top, it will the working environment of contamination grinding, portion
Morcelling bits will swim among air, can also influence the health of operating personnel.
The content of the invention
It is an object of the invention to provide a kind of abrasion reduced between air valve and valve seat mating surface, air valve and valve are avoided
There is indenture during seat mating surface grinding, and the tidiness of working environment can be improved, ensure that the ship of operating personnel's health is used
Diesel valve and valve seat mating surface Ginding process.
Marine diesel engine air valve in this programme with valve seat mating surface Ginding process, it is necessary to using a kind of lapping device,
The fixed mechanism for fixed valve base is provided with, is opened in frame with the cam for being offseted with air valve valve rod, frame including frame
There is the perforate passed through for air valve valve rod, cam rotation is connected in frame, and main tracheae is fixed with frame, and main tracheal strips rotate
The first turbine and the second turbine are connected with, cam coaxial is mutually connected on the first turbine, and the second turbine is coaxially connected with negative pressure blade,
Negative pressure blade is rotatably arranged in air scoop, and venthole is provided with air scoop, and filter is communicated with venthole, and negative pressure blade is same
Axle is connected with jet ring tube, and jet ring tube is located at the lower section of negative pressure blade, shower nozzle, shower nozzle are communicated with the inside of jet ring tube
Towards air valve and valve seat mating surface, clamping rings pipe is communicated with jet ring tube, jet ring tube is rotatably connected on fixed circle
On endless tube, clamping rings pipe is fixed in frame, the connection of clamping rings Guan Yuzhu tracheaes；
Comprise the following steps：
A, polish：To main ventilated inside gas pipe, the first turbine drives cam rotation, and cam will push the upper and lower cunning of air valve opposite valve seat
It is dynamic；
B, purge：Main endotracheal gas is flowed into jet ring tube, and gas is injected between air valve and valve seat by shower nozzle,
And friction chip is purged；
C, except chip：Second turbine drives negative pressure blade to rotate, and negative pressure is formed at negative pressure blade, and chip is drawn into air scoop
Interior, chip is flowed into filter along air scoop, and filter filter off removing to chip.
The technical principle of this programme is：Frame is used to place air valve and valve seat, and for supporting whole device, fixed mechanism
For valve seat to be fixed on into frame, perforate is used to pass through air valve valve rod, after valve seat is fixed, air valve valve rod is inserted into
In valve seat, air valve valve rod passes through perforate, and air valve valve rod bottom will offset with cam.
A, polish：Main tracheae to be ventilated, gas will drive the first turbine rotation, and the first turbine drives cam rotation,
Cam is coordinated with air valve valve rod self gravitation so that air valve valve rod does upper and lower reciprocally motion, so as to formed air valve with
Valve seat mating surface grinding operation.
B, purge：Gas can drive the second turbine rotation again, and the second turbine drives negative pressure blade to rotate, and negative pressure blade drives
Jet ring tube rotates, and jet ring tube connects with clamping rings pipe, and main tracheae connects with clamping rings pipe again, and gas will pass through
Clamping rings pipe is entered in jet ring tube, and is injected to from shower nozzle on air valve and valve seat mating surface, and because jet annulus
Pipe is to rotate, and shower nozzle can purge to air valve and the whole circumference of valve seat mating surface, and air valve and valve seat mating surface are everywhere
It can be purged to, it is clean so as to which chip be removed, so as to reduce the abrasion between air valve and valve seat mating surface, it is therefore prevented that gas
There is indenture with valve seat mating surface because of friction chip in valve.
C, except chip：Second turbine drives negative pressure blade to rotate, and negative pressure is formed at negative pressure blade, it will broken after purging
Bits are drawn into air scoop, and gas will flow out with chip from the outlet of air scoop, and flow into filter, and filter is to chip
Filtered, the clean gas after filtering, discharged from the outlet of filter, it is therefore prevented that chip floats in air and influences operation
The health of personnel.
Compared with prior art, this programme has the beneficial effect that：This programme is justified by the second turbine, negative pressure blade and jet
The setting of endless tube, the chip being ground can be subjected to purge, and chip is carried out by guiding discharge by negative pressure, avoid gas
The presence of valve and valve seat mating surface chip, reduces the abrasion between air valve and valve seat mating surface, it is therefore prevented that the appearance of indenture,
Chip is prevented to be slipped in frame so that working environment is cleaner and tidier, it is therefore prevented that the floating of chip, to ensure that the body of operating personnel
Body health.
Further：Also include being used for the vibrating mechanism for vibrating valve seat, vibrating mechanism includes the fan being rotatably connected in frame
Gear and the rack being slidably connected in frame, elevating arc and rack intermeshing, are connected between one end of rack and frame
First spring, the other end and the valve seat of rack offset.Elevating arc is rotated, elevating arc will be engaged intermittently with rack, work as elevating arc
When being engaged with rack, rack moves to the direction away from valve seat, and when elevating arc is disengaged from rack, the first spring will promote
Rack hits valve seat, and valve seat will produce vibration, stick in chip on valve seat and vibrated from valve seat, chip be purged out immediately
Go, so that chip removal is cleaner.
Further：Backing plate is fixedly connected with one end that rack offsets with valve seat, backing plate offsets with valve seat.Backing plate is set
Put, can prevent rack from directly being contacted with valve seat, reduce the abrasion between rack and valve seat, so as to extend rack and valve seat
Service life.
Further：The tapping of frame is provided with the protective plate for being offseted with air valve valve rod, between protective plate and frame
Second spring is connected with, protective plate bottom offsets with cam.The setting of protective plate, it can prevent cam from directly being contacted with protective plate,
Avoid cam air valve valve rod is caused to wear, so as to extend the service life of air valve valve rod.
Further：The gas outlet of filter is communicated with escape pipe, and escape pipe extend into valve seat and slided with air valve stem bottom
At the cooperation of connection.Escape pipe is set here, the clean gas filtered out is blown into valve seat and slided with air valve stem bottom
At the cooperation of dynamic connection, and the gap between valve seat and air valve valve rod flow to air valve with that in valve seat mating surface, will can fall
Enter to the chip between valve seat and air valve valve rod and blow down so that chip removes more clean, ensure that air valve coordinates with valve seat
Face grinding quality.
Further：Shower nozzle is several, and several shower nozzles are circumferentially distributed on the inner side of jet ring tube.So that gas can be with
More uniformly it is blown into air valve and valve seat mating surface so that chip removes cleaner.
Brief description of the drawings
Fig. 1 is marine diesel engine air valve of the present invention and a kind of lapping device in valve seat mating surface Ginding process embodiment
Schematic diagram；
Fig. 2 is the schematic diagram that jet ring tube, clamping rings pipe and shower nozzle coordinate in Fig. 1.
Embodiment
Below by embodiment, the present invention is further detailed explanation：
Reference in Figure of description includes：Frame 1, air pump 2, cam 3, protective plate 4, air valve valve rod 5, valve seat 6, jet
Ring tube 7, clamping rings pipe 8, negative pressure blade 9, rack 10, elevating arc 11, filter 12, shower nozzle 13.
Shown in the basic reference chart 1 of embodiment and Fig. 2, marine diesel engine air valve with valve seat mating surface Ginding process, it is necessary to
Using a kind of lapping device, including frame 1, the neck for fixed valve base 6 is provided with frame 1, is slided in neck and clamping is set
Plate, the 5th spring is connected between clamping plate and neck, neck internal thread is connected with screw rod, and screw rod offsets with clamping plate, frame 1
The fixed mechanism for fixed valve base 6 is provided with, the perforate passed through for air valve valve rod 5, the perforate of frame 1 are provided with frame 1
Place is provided with the protective plate 4 for being offseted with air valve valve rod 5, and second spring, protective plate 4 are connected between protective plate 4 and frame 1
Bottom mutually has cam 3, and cam 3 is rotatably connected in frame 1, and air pump 2 has been bolted in frame 1, and air pump 2 is communicated with
Main tracheae, main tracheal strips are rotatably connected to the first turbine and the second turbine, and cam 3 is coaxially mutually connected on the first turbine, the second whirlpool
Wheel is coaxially connected with negative pressure blade 9, and negative pressure blade 9 is rotatably arranged in air scoop, is provided with venthole on air scoop, on venthole
Filter 12 is communicated with, the gas outlet of filter 12 is communicated with escape pipe, and escape pipe extend into valve seat 6 and the bottom of air valve valve rod 5
At the cooperation being slidably connected, negative pressure blade 9 is coaxially connected with jet ring tube 7, and jet ring tube 7 is located under negative pressure blade 9
Side, the inner side of jet ring tube 7 are communicated with ten shower nozzles 13, the circumferential inner side for being distributed on jet ring tube 7 of ten shower nozzles 13, ten
Shower nozzle 13 is communicated with clamping rings pipe 8, jet ring tube 7 rotates towards air valve and the mating surface of valve seat 6 on jet ring tube 7
It is connected on clamping rings pipe 8, clamping rings pipe 8 is connected in frame 1 by clip, and clamping rings pipe 8 connects with main tracheae,
The vibrating mechanism for vibrating valve seat 6 is provided with frame 1, vibrating mechanism includes the elevating arc 11 being rotatably connected in frame 1
With the rack 10 being slidably connected in frame 1, elevating arc 11 and rack 10 are intermeshed, and are connected between the left end of rack 10 and frame 1
The first spring is connected to, backing plate is welded with the right-hand member of rack 10, rack 10 is offseted by backing plate and valve seat 6.
In use, valve seat 6 is put into neck, screw rod is screwed, screw rod promotes clamping plate that valve seat 6 is fixedly clamped, will
Air valve valve rod 5 is inserted into valve seat 6, and air valve valve rod 5 passes through perforate, and is offseted with protective plate 4, the bottom of protective plate 4 and the phase of cam 3
Support, booster air pump 2, main tracheae is ventilated, gas will drive the first turbine and the second worm gear wheel, and the first turbine drives convex
Wheel 3 is rotated, and cam 3 is coordinated with the self gravitation of air valve valve rod 5 so that and air valve valve rod 5 does upper and lower reciprocally motion, from
And form air valve and the mating surface grinding operation of valve seat 6；Gas can drive the second turbine rotation again, and the second turbine drives negative pressure blade
9 rotate, and negative pressure blade 9 drives jet ring tube 7 to rotate, and gas will be entered in jet ring tube 7 by clamping rings pipe 8,
And be injected to from shower nozzle 13 on air valve and the mating surface of valve seat 6, and because jet ring tube 7 is to rotate, ten shower nozzles 13 can be right
Air valve and the whole circumference of the mating surface of valve seat 6 are purged, and air valve can be purged to everywhere with the mating surface of valve seat 6, negative pressure
Blade 9 rotates, it will and the chip after purging is drawn into air scoop, and gas will flow out with chip from the outlet of air scoop,
And flow into filter 12, filter 12 filters to chip, the clean gas after filtering, is arranged from the outlet of filter 12
Go out, and be drained at the cooperation that valve seat 6 is connected with the basal sliding of air valve valve rod 5, and between valve seat 6 and air valve valve rod 5
Gap flow to air valve with that in the mating surface of valve seat 6, can blow down the chip dropped between valve seat 6 and air valve valve rod 5 so that broken
Bits remove cleaner.
During chip is removed, elevating arc 11 is rotated, elevating arc 11 will be engaged intermittently with rack 10, work as elevating arc
11 with rack 10 when engaging, and rack 10 is to left movement, and when elevating arc 11 and rack 10 are disengaged from, the first spring will promote tooth
Bar 10 moves right, and rack 10 drives backing plate to hit valve seat 6, and valve seat 6 will produce vibration, stick on valve seat 6 chip from valve seat 6
Upper to vibrate, chip is purged out immediately.
Above-described is only embodiments of the invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme
Excessive description., without departing from the structure of the invention, can be with it should be pointed out that for those skilled in the art
Several modifications and improvements are made, these should also be considered as protection scope of the present invention, and these are implemented all without the influence present invention
Effect and practical applicability.The scope of protection required by this application should be based on the content of the claims, in specification
The records such as embodiment can be used for the content for explaining claim.
Claims (6)
1. marine diesel engine air valve and valve seat mating surface Ginding process, it is characterised in that need to use a kind of lapping device, wrap
Including rack and the cam for being offseted with air valve valve rod, frame are provided with the fixed mechanism for fixed valve base, are provided with frame
The perforate passed through for air valve valve rod, cam rotation are connected in frame, and main tracheae is fixed with frame, and main tracheal strips, which rotate, to be connected
The first turbine and the second turbine are connected to, cam coaxial is mutually connected on the first turbine, and the second turbine is coaxially connected with negative pressure blade, is born
Pressure blade is rotatably arranged in air scoop, and venthole is provided with air scoop, filter is communicated with venthole, negative pressure blade is coaxial
Jet ring tube is connected with, jet ring tube is located at the lower section of negative pressure blade, shower nozzle, shower nozzle court are communicated with the inside of jet ring tube
To air valve and valve seat mating surface, clamping rings pipe is communicated with jet ring tube, jet ring tube is rotatably connected on clamping rings
Guan Shang, clamping rings pipe are fixed in frame, the connection of clamping rings Guan Yuzhu tracheaes；
Comprise the following steps：
A, polish：To main ventilated inside gas pipe, the first turbine drives cam rotation, and cam will push the upper and lower cunning of air valve opposite valve seat
It is dynamic；
B, purge：Main endotracheal gas is flowed into jet ring tube, and gas is injected between air valve and valve seat by shower nozzle,
And friction chip is purged；
C, except chip：Second turbine drives negative pressure blade to rotate, and negative pressure is formed at negative pressure blade, and chip is drawn into air scoop
Interior, chip is flowed into filter along air scoop, and filter filter off removing to chip.
2. marine diesel engine air valve according to claim 1 and valve seat mating surface Ginding process, it is characterised in that：Also wrap
The vibrating mechanism for vibrating valve seat is included, vibrating mechanism includes the elevating arc being rotatably connected in frame and is slidably connected at frame
On rack, elevating arc and rack intermeshing, the first spring, the other end of rack are connected between one end of rack and frame
Offseted with valve seat.
3. marine diesel engine air valve according to claim 2 and valve seat mating surface Ginding process, it is characterised in that：It is described
Backing plate is fixedly connected with one end that rack offsets with valve seat, backing plate offsets with valve seat.
4. marine diesel engine air valve according to claim 1 and valve seat mating surface Ginding process, it is characterised in that：It is described
The tapping of frame is provided with the protective plate for being offseted with air valve valve rod, and second spring is connected between protective plate and frame,
Protective plate bottom offsets with cam.
5. marine diesel engine air valve according to claim 1 and valve seat mating surface Ginding process, it is characterised in that：It is described
The gas outlet of filter is communicated with escape pipe, and escape pipe is extend at the cooperation that valve seat is slidably connected with air valve stem bottom.
6. marine diesel engine air valve and valve seat mating surface Ginding process according to any one of claim 1-5, it is special
Sign is：The shower nozzle is several, and several shower nozzles are circumferentially distributed on the inner side of jet ring tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763386.5A CN107571117B (en) | 2017-08-30 | 2017-08-30 | Marine diesel engine air valve and valve seat mating surface grinding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710763386.5A CN107571117B (en) | 2017-08-30 | 2017-08-30 | Marine diesel engine air valve and valve seat mating surface grinding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107571117A true CN107571117A (en) | 2018-01-12 |
| CN107571117B CN107571117B (en) | 2019-01-29 |
Family
ID=61030298
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710763386.5A Active CN107571117B (en) | 2017-08-30 | 2017-08-30 | Marine diesel engine air valve and valve seat mating surface grinding method |
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| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108746073A (en) * | 2018-05-31 | 2018-11-06 | 重庆荣爵摩托车有限公司 | Packaging for motorcar cleaning device |
| CN110509144A (en) * | 2019-09-05 | 2019-11-29 | 滨州职业学院 | A kind of boat diesel engine grinding apparatus |
| CN112518515A (en) * | 2020-11-28 | 2021-03-19 | 浙江德清炜烨新材料股份有限公司 | Grinding device for refractory brick |
| CN114083013A (en) * | 2021-11-18 | 2022-02-25 | 徐州华之厚机械制造有限公司 | Drilling equipment for machine-building |
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| CN1168118A (en) * | 1995-12-05 | 1997-12-17 | 罗伯特·博施有限公司 | Valve obturator and method and device for producing sealing surface on such obturator |
| CN101402180A (en) * | 2008-11-18 | 2009-04-08 | 北京精密机电控制设备研究所 | Auxiliary overlap joint hydraulic match grinding process for spool valve of servo valve |
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| CN203680016U (en) * | 2013-12-27 | 2014-07-02 | 山海关船舶重工有限责任公司 | Grinding device for matching surfaces of air valve and valve seat of diesel engine for large ship |
| CN105458869A (en) * | 2015-12-29 | 2016-04-06 | 东北石油大学 | Conical face sealing pair grinding fit device with quantitative loading function |
| CN106363512A (en) * | 2016-08-28 | 2017-02-01 | 浙江春宝胶囊有限公司 | Capsule polishing and conveying device |
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2017
- 2017-08-30 CN CN201710763386.5A patent/CN107571117B/en active Active
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| CN1168118A (en) * | 1995-12-05 | 1997-12-17 | 罗伯特·博施有限公司 | Valve obturator and method and device for producing sealing surface on such obturator |
| CN101402180A (en) * | 2008-11-18 | 2009-04-08 | 北京精密机电控制设备研究所 | Auxiliary overlap joint hydraulic match grinding process for spool valve of servo valve |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108746073A (en) * | 2018-05-31 | 2018-11-06 | 重庆荣爵摩托车有限公司 | Packaging for motorcar cleaning device |
| CN110509144A (en) * | 2019-09-05 | 2019-11-29 | 滨州职业学院 | A kind of boat diesel engine grinding apparatus |
| CN112518515A (en) * | 2020-11-28 | 2021-03-19 | 浙江德清炜烨新材料股份有限公司 | Grinding device for refractory brick |
| CN114083013A (en) * | 2021-11-18 | 2022-02-25 | 徐州华之厚机械制造有限公司 | Drilling equipment for machine-building |
| CN114083013B (en) * | 2021-11-18 | 2024-03-29 | 徐州华之厚机械制造有限公司 | Drilling device for machine-building |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107571117B (en) | 2019-01-29 |
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Effective date of registration: 20191023 Address after: 102600 Unit 403, Unit 1, 15th Floor, Changfengyuan, Huangcun Town, Daxing District, Beijing Patentee after: Du Lihong Address before: 402160 No. 65 South Railway Station, Yongchuan District, Chongqing Patentee before: CHONGQING YONGCHUAN DISTRICT TAIXING MACHINERY FACTORY |
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Address after: 210000 Shui Gang No. 6, Gulou District, Nanjing, Jiangsu Patentee after: Du Lihong Address before: 102600 Unit 403, Unit 1, 15th Floor, Changfengyuan, Huangcun Town, Daxing District, Beijing Patentee before: Du Lihong |
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Address after: 241000 green food Economic Development Zone, three mountains, Anhui, Wuhu Patentee after: Du Lihong Address before: 210000 Shui Gang No. 6, Gulou District, Nanjing, Jiangsu Patentee before: Du Lihong |
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Effective date of registration: 20201221 Address after: 276800 Room 201, 119 Shanghai Road, Rizhao Economic Development Zone, Shandong Province Patentee after: SUNUP MARINE ENGINEERING Co.,Ltd. Address before: 241000 green food Economic Development Zone, Sanshan District, Wuhu City, Anhui Province Patentee before: Du Lihong |
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