CN102737905A - Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism - Google Patents
Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism Download PDFInfo
- Publication number
- CN102737905A CN102737905A CN2012101990264A CN201210199026A CN102737905A CN 102737905 A CN102737905 A CN 102737905A CN 2012101990264 A CN2012101990264 A CN 2012101990264A CN 201210199026 A CN201210199026 A CN 201210199026A CN 102737905 A CN102737905 A CN 102737905A
- Authority
- CN
- China
- Prior art keywords
- spring
- permanent magnet
- main shaft
- cam
- flexible connector
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 98
- 230000005389 magnetism Effects 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention has the technical scheme that a vacuum circuit breaker self-adaption operating mechanism with the properties of a permanent magnet and a spring mechanism is mainly formed by connecting a spring operating device, a flexible connector and a permanent magnet device through a joinable drive rod and a joinable main shaft, wherein a cam in the spring operating device is connected with one end of the flexible connector through a connecting-rod end of a cam drive rod, and the other end of the flexible connector is connected with the permanent magnet device through the main shaft. When no power supply is externally provided or a permanent magnet controller fails to work, energy is stored in the spring mechanism manually, and the energy storage part of a spring is connected with the flexible connector for driving the main shaft to carry out the closing operation. The flexible connector absorbs the interference energy of the spring part. Consequently, the connection with the permanent magnet device is completed. Under normal condition, the permanent magnet device completes the normal closing and opening processes through the permanent magnet controller.
Description
Technical field
The invention belongs to the operating mechanism that uses in the electric power system circuit breaker, have the self-adapting control mechanism of permanent magnetism and spring mechanism characteristic.
Background technology
The operating mechanism of vacuum circuit-breaker mainly contains electromagnetic operating mechanism, spring operating mechanism and permanent-magnet manipulating mechanism etc. at present.
Electromagnetic operating mechanism obtained using more widely in the vacuum circuit-breaker early stage of development, but the electromagnetic operating mechanism structure is heavy, and operate time is longer.Do not having to carry out closing operation under the power supply situation.
Spring operating mechanism is one type of the most frequently used operating mechanism of vacuum circuit-breaker, and its advantage is not need powerful DC power supply, only needs the energy storage motor of a low power AC/DC, and is not having to carry out the on/off switch operation under the power supply situation.Its shortcoming is the structure more complicated, and number of parts is many, and requires machining accuracy high, and failure rate is higher.And the power producing characteristics of spring operating mechanism and the load characteristic of vacuum circuit-breaker are not complementary, and on contour curve and bar linkage structure, carry out appropriate design.
Permanent-magnet manipulating mechanism is the short operating mechanism of a kind of development time; Its use permanent magnet has replaced traditional locker and has realized the maintenance of vacuum circuit-breaker branch, closing position (only not making separating brake with the combined floodgate maintenance of permanent magnet do sometimes keeps); Main motion parts has only one during permanent-magnet manipulating mechanism work; Divide, switching current is little, lower to the requirement of operating power, its noise is also low.Permanent-magnet manipulating mechanism is relatively simple for structure, and reliable in action property is high, and mechanical endurance is long, and volume is little, and is in light weight.But under present condition, the conventional principle permanent-magnet manipulating mechanism also can't reach very high responsiveness.And do not having to carry out closing operation under the power supply situation.
Summary of the invention
It is not enough to the objective of the invention is to overcome above-mentioned prior art, and a kind of self-adapting control mechanism that the permanent magnet mechanism characteristics have the spring mechanism characteristic again that has is provided, and this mechanism structure is reasonable, and operational reliability is high, long service life.
Technical scheme of the present invention is achieved in that the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic; It mainly is made up of through attachable drive rod and main shaft connection spring operation means, flexible connector and permanent magnet mechanism; Cam in the spring operation means connects with flexible connector one end through rotating shaft through the cam driving-rod connecting-rod head, and the other end of flexible connector is connected with permanent magnet mechanism through main shaft.
Said spring operation means is by unidirectional province powershift gear; Cam, cam driving-rod and main spring constitute, and unidirectional province powershift gear is connected with the main spring lower end with cam-engaged and through linkage, and the main spring upper end is installed on the cam simultaneously, gear end in the cam driving-rod and cam (2) engagement.
The present invention includes the permanent magnet mechanism part, spring energy-storage part and flexible connector are partly formed.When the external world lost power supply or permanent magnetism controller failure, for spring mechanism carries out energy storage, the spring energy-storage part was carried out closing operation through be connected driving main shaft with flexible connector through manually.Flexible connector has absorbed the interference portion of energy of spring section.Completion is connected with permanent magnet mechanism.The normal condition permanent magnet mechanism is accomplished normal occlusion separating brake process through the permanent magnetism controller.
Effect of the present invention is embodied in:
1) the present invention has adopted the simplest spring operation means (spring energy agency), and the conventional springs stored energy mechanism when keeping the ability of exerting oneself, has reduced original energy storage and kept relatively; Links such as preparation combined floodgate have reduced operating mechanism moving component and heavy moving parts largely, can improve the ability of the driving load of operating mechanism significantly.
2) the present invention has adopted novel permanent magnetic mechanism (having applied for patent of invention) scheme, traditional permanent magnet mechanism under external force, magnetic field changes and can produce counter-force and can't keep.Novel permanent magnetic mechanism head it off.
3) the present invention has adopted the action scheme of self-adaptation type, adopts flexible connecting device (having applied for patent of invention) to avoid matching problem between spring mechanism and the permanent magnet mechanism between spring mechanism and the permanent magnet mechanism.Alleviate the requirement of mechanical strength of circuit breaker, can prolong the operating life of circuit breaker effectively.
Description of drawings
Fig. 1 is the structural representation (spring-operated end) of the present invention under the combined floodgate hold mode.
Fig. 2 is the structural representation (permanent magnet mechanism operating side) of the present invention under the combined floodgate hold mode.
Fig. 3 is the structural representation (spring-operated end) of the present invention under the separating brake hold mode.
Fig. 4 is the structural representation (permanent magnet mechanism operating side) of the present invention under the separating brake hold mode.
Fig. 5 is a flexible connector structural representation of the present invention.
Fig. 6 is the bistable-state permanent magnet mechanism ("on" position) of conventional principle.
Fig. 7 is the Monostable permanent magnetic mechanism ("on" position) of conventional principle.
Fig. 8 is permanent magnet mechanism ("on" position) among the present invention.
Fig. 9 is the bistable-state permanent magnet mechanism (gate-dividing state) of conventional principle.
Figure 10 is the Monostable permanent magnetic mechanism (gate-dividing state) of conventional principle.
Figure 11 is a permanent magnet mechanism of the present invention (gate-dividing state).
Figure 12,13 is respectively to permanent magnet mechanism of the present invention closes, separating brake process magnetic loop figure.
Figure 14 keeps magnetic loop figure for permanent magnet mechanism of the present invention.
Below in conjunction with accompanying drawing content of the present invention is done further explain.
Embodiment
Shown in Fig. 1-4, the present invention is mainly by spring operation means; Flexible connector and permanent magnet mechanism connect formation through attachable drive rod with main shaft.Spring operation means is by element 1 unidirectional province powershift gear; Element 2 cams; Element 3 cam driving-rods are formed and element 7 main springs.Be connected with element 5 main shafts through element 4 flexible connectors.Permanent magnet mechanism 6 is connected with element 5 main shafts.Cam 2 in the spring operation means connects with flexible connector 4 one ends through rotating shaft through cam driving-rod 3 connecting-rod heads, and flexible connector 4 other ends are connected with permanent magnet mechanism 6 through main shaft 5.Said spring operation means is by unidirectional province powershift gear 1; Cam 2, cam driving-rod 3 and main spring 7 constitute, and unidirectional province powershift gear 1 is connected with main spring 7 lower ends with cam 2 engagements and through linkage, and main spring 7 upper ends are installed on the cam 2 simultaneously, gear end in the cam driving-rod 3 and cam 2 engagements.
Said flexible connector is as shown in Figure 5; Comprise connector 4-1, spring 4-2, adjusting nut 4-3 and constrictor 4-4; Spring 4-2 is installed in the bourdon tube, and bourdon tube one end and connector 4-1 fix, and the other end of bourdon tube is equipped with constrictor 4-4 through adjusting nut 4-3.Adjusting nut 4-3 is connected with bourdon tube through screw thread, and constrictor 4-4 top is shaped on the convex edge and is enclosed within the adjusting nut 4-3.The flexible connector operation principle: spring mechanism compresses the overshoot energy to spring through constrictor 4-4 and absorbs overshoot, makes the rational position that remains on of permanent magnet mechanism.The precompression of spring (adjusting nut 4-3 adjustment) has ensured the transmission of power.Pass to main shaft through connector 1.Spring mechanism is through constrictor 4-4, when transmitting power less than the spring initial pressure for compression spring 4-2. NE BY ENERGY TRANSFER; Spring is a rigidity characteristics.Be directly passed to connector 1. driving main shaft.Transmission power is during greater than the spring initial pressure; Excess energy is absorbed by spring, and its surplus energy drives connector 4-1 driving main shaft.Execution.
Said permanent magnet mechanism (6) is like Fig. 8. and shown in Figure 11-13, keep the loop to constitute by electromagnetic circuit and magnetic, electromagnetic circuit is made up of main shaft 6-1, yoke 6-2, closing coil 6-3, switching winding 6-5 and moving iron core 6-7; Magnetic keeps the loop to be made up of permanent magnet 6-4 and pole shoe 6-6.Moving iron core 6-7 is installed on the main shaft 6-1; Yoke 6-2 is installed in and is positioned at moving iron core 6-7 two ends on the main shaft 6-1; Closing coil 6-3 and switching winding 6-5 are contained in around the moving iron core 6-7; Pole shoe 6-6 is enclosed within and is positioned at moving iron core 6-7 upper end on the main shaft 6-1, and around permanent magnet 6-4 pole shoe 6-6 was positioned at, moving iron core 6-7 lower end was the air-gap 6-8 that main shaft 6-1 is connected with the circuit breaker main shaft.
The permanent magnet mechanism main feature is to set up independent magnetic at the end that closes a floodgate to keep the loop among the present invention.
Permanent magnet mechanism closes the branch action to carry out through electromagnetic circuit.Remaining on then of mechanism accomplished by magnetic loop.Two loop independent operatings are independent of each other.The novel permanent magnetic mechanism that the present invention designs.Promptly kept the characteristics of existing permanent magnet mechanism to solve permanent magnet mechanism demagnetization and loop exciting current increase problem again; Solved simultaneously the low problem of existing permanent magnet mechanism opening velocity effectively.For a kind of new method is started out in permanent magnet mechanism application on big capacity switch.This mechanism structure is reasonable, and operational reliability is high, long service life.
Permanent magnet mechanism of the present invention effect in the present invention is embodied in: the excitation electric power that electromagnetic circuit produces during combined floodgate does not keep the loop through permanent magnetism, can be because of the magnetic resistance of permanent magnetic circuit generation.Traditional relatively permanent magnet mechanism when keeping the ability of exerting oneself, has reduced the obstruction of the magnetic resistance of permanent magnet to exciting current; Reduce the operating mechanism starting current largely, can improve the ability of the driving load of operating mechanism significantly.The present invention adopts new electromagnetic circuit scheme, has fundamentally solved traditional permanent magnet mechanism under external force, and magnetic field changes and can produce the problem that counter-force can't keep.For new method is opened up in the permanent magnet mechanism application.The present invention adopts new electromagnetic circuit scheme.The excitation electric power that electromagnetic circuit produces during separating brake does not keep the loop can not produce permanent magnet mechanism demagnetization problem through permanent magnetism.
The operation principle of mechanism of the present invention is following:
Closing by hand: the outside does not have under the situation of power supply or the inefficacy of permanent magnetism controller; Rotating element 1; Be installed in the element 7 switching-in spring energy storage on element 2 cams; The spring drive cam that releases energy when peaking, driving element 3 cam driving-rods act on driving main shaft on element 4 flexible connectors.The element of main shaft drive simultaneously 6 permanent magnet mechanisms to closing position permanent magnet mechanism keeps.The excess energy that spring releases energy is absorbed by flexible connector.Cam resets, for separating brake is prepared.
Electronic on/off switch: under the normal condition, permanent magnet mechanism carries out the on/off switch operation through the permanent magnetism controller.
Claims (6)
1. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic; It is characterized in that mainly connecting through attachable drive rod and main shaft (5) constituting by spring operation means, flexible connector (4) and permanent magnet mechanism (6); Cam in the spring operation means (2) connects with flexible connector (4) one ends through rotating shaft through cam driving-rod (3) connecting-rod head, and the other end of flexible connector (4) is connected with permanent magnet mechanism (6) through main shaft (5).
2. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic according to claim 1 is characterized in that said spring operation means is by unidirectional province powershift gear (1); Cam (2), cam driving-rod (3) and main spring (7) constitute; Unidirectional province powershift gear (1) is connected with main spring (7) lower end with cam (2) engagement and through linkage; Main spring (7) upper end is installed on the cam (2) simultaneously, gear end in the cam driving-rod (3) and cam (2) engagement.
3. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic according to claim 1; It is characterized in that said flexible connector; Comprise connector (4-1), spring (4-2), adjusting nut (4-3) and constrictor (4-4); Spring (4-2) is installed in the bourdon tube, and bourdon tube one end and connector (4-1) are fixing, and the other end of bourdon tube is equipped with constrictor (4-4) through adjusting nut (4-3).
4. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic according to claim 3; It is characterized in that adjusting nut (4-3) is connected with bourdon tube through screw thread, constrictor (4-4) top is shaped on the convex edge and is enclosed within the adjusting nut (4-3).
5. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic according to claim 1; It is characterized in that said permanent magnet mechanism (6) keeps the loop to constitute by electromagnetic circuit and magnetic, electromagnetic circuit is made up of main shaft (6-1), yoke (6-2), closing coil (6-3), switching winding (6-5) and moving iron core (6-7); Magnetic keeps the loop to be made up of permanent magnet (6-4) and pole shoe (6-6).
6. the vacuum circuit-breaker self-adapting control mechanism that possesses permanent magnetism and spring mechanism characteristic according to claim 1; It is characterized in that moving iron core (6-7) is installed on the main shaft (6-1); Yoke (6-2) is installed in and is positioned at moving iron core (6-7) two ends on the main shaft (6-1); Closing coil (6-3) and switching winding (6-5) are contained in moving iron core (6-7) on every side; Pole shoe (6-6) is enclosed within and is positioned at moving iron core (6-7) upper end on the main shaft (6-1), and around permanent magnet (6-4) pole shoe (6-6) was positioned at, moving iron core (6-7) lower end was the air-gap (6-8) that main shaft (6-1) is connected with the circuit breaker main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199026.4A CN102737905B (en) | 2012-06-15 | 2012-06-15 | Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210199026.4A CN102737905B (en) | 2012-06-15 | 2012-06-15 | Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102737905A true CN102737905A (en) | 2012-10-17 |
| CN102737905B CN102737905B (en) | 2014-11-05 |
Family
ID=46993198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210199026.4A Expired - Fee Related CN102737905B (en) | 2012-06-15 | 2012-06-15 | Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102737905B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451486A (en) * | 2016-09-21 | 2017-02-22 | 上海思源电力电容器有限公司 | Phase-selection switching control system of high-voltage circuit breaker |
| CN113066690A (en) * | 2021-05-20 | 2021-07-02 | 郑州瑞能物联网技术有限公司 | Elastic transmission device for circuit breaker operating mechanism |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3921109A (en) * | 1974-06-20 | 1975-11-18 | Westinghouse Electric Corp | Circuit-interrupter |
| CN101055815A (en) * | 2007-05-17 | 2007-10-17 | 陕西华电电气有限公司 | Vacuum switch with the dual operation machine |
| CN101350268A (en) * | 2008-08-25 | 2009-01-21 | 童建朋 | Permanent magnet type vacuum circuit-breaker |
| CN201256121Y (en) * | 2008-08-02 | 2009-06-10 | 田利民 | Permanent magnet mechanism for large capacity vacuum circuit breaker |
| CN202523629U (en) * | 2012-02-21 | 2012-11-07 | 陕西烽火盛天电子科技有限公司 | Novel vacuum composite circuit breaker |
| CN202749292U (en) * | 2012-06-15 | 2013-02-20 | 田利民 | A vacuum circuit breaker self-adaptive operating mechanism with the properties of permanent magnet and spring mechanisms |
-
2012
- 2012-06-15 CN CN201210199026.4A patent/CN102737905B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3921109A (en) * | 1974-06-20 | 1975-11-18 | Westinghouse Electric Corp | Circuit-interrupter |
| CN101055815A (en) * | 2007-05-17 | 2007-10-17 | 陕西华电电气有限公司 | Vacuum switch with the dual operation machine |
| CN201256121Y (en) * | 2008-08-02 | 2009-06-10 | 田利民 | Permanent magnet mechanism for large capacity vacuum circuit breaker |
| CN101350268A (en) * | 2008-08-25 | 2009-01-21 | 童建朋 | Permanent magnet type vacuum circuit-breaker |
| CN202523629U (en) * | 2012-02-21 | 2012-11-07 | 陕西烽火盛天电子科技有限公司 | Novel vacuum composite circuit breaker |
| CN202749292U (en) * | 2012-06-15 | 2013-02-20 | 田利民 | A vacuum circuit breaker self-adaptive operating mechanism with the properties of permanent magnet and spring mechanisms |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451486A (en) * | 2016-09-21 | 2017-02-22 | 上海思源电力电容器有限公司 | Phase-selection switching control system of high-voltage circuit breaker |
| CN113066690A (en) * | 2021-05-20 | 2021-07-02 | 郑州瑞能物联网技术有限公司 | Elastic transmission device for circuit breaker operating mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102737905B (en) | 2014-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106373822B (en) | A kind of spring operating mechanism of circuit breaker | |
| CN102737905B (en) | Vacuum circuit breaker self-adaption operating mechanism with properties of permanent magnet and spring mechanism | |
| CN101882531A (en) | Manual closing mechanism of high-voltage vacuum permanent magnet mechanism circuit-breaker | |
| CN202749292U (en) | A vacuum circuit breaker self-adaptive operating mechanism with the properties of permanent magnet and spring mechanisms | |
| CN201294199Y (en) | Manual brake-dividing device for high voltage AC vacuum circuit breaker | |
| CN101447365A (en) | Monostable permanent magnetism operating mechanism | |
| CN100459009C (en) | DC permanent magnet contactor | |
| CN206889526U (en) | A kind of novel automobile electromagnetic clutch | |
| CN203103244U (en) | Novel permanent magnetic actuator | |
| CN205282381U (en) | Permanent magnetic actuator | |
| CN204407205U (en) | Manual spring operating mechanism | |
| CN201259843Y (en) | Bi-stable permanent magnet mechanism | |
| CN206864416U (en) | A kind of unicoil breaker spring operating mechanism | |
| CN103280373B (en) | Permanent magnetism in outdoor three-phase column vacuum breaker and spring dual operation mechanisms | |
| CN202977313U (en) | Rotatory-inertia-moment-increasing rotating type armature component for magnetic latching relay | |
| CN202510816U (en) | Intelligent permanent magnet control valve | |
| CN202749293U (en) | Flexible connector of operating mechanism of vacuum circuit breaker | |
| CN202749319U (en) | Novel permanent magnetic operating mechanism | |
| CN203859055U (en) | Outdoor vacuum circuit breaker operated by permanent magnetic mechanism | |
| CN106531489B (en) | Dual-power transfer switch permanent magnetic drive structure is pressed in one kind | |
| CN204946790U (en) | Electric railway single-phase permanent circuit breaker | |
| CN204434981U (en) | A kind of washing machine Alveolus type clutch wash-out conversion equipment | |
| CN208796902U (en) | A kind of permanent-magnet operating mechanism | |
| CN203013551U (en) | Integrated permanent magnetic operating mechanism with hand-operated sub-gate | |
| CN203192687U (en) | Permanent magnet vacuum circuit breaker hand-operated switch-on apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: XINJIANG MME ELECTRIC JOINT-STOCK CO., LTD. Free format text: FORMER OWNER: TIAN LIMIN Effective date: 20130121 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 721013 BAOJI, SHAANXI PROVINCE TO: 831100 CHANGJI HUI AUTONOMOUS PREFECTURE, XINJIANG UYGUR AUTONOMOUS REGION |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20130121 Address after: 831100 No. 388 South Beijing Road, Xinjiang, Changji Applicant after: XINJIANG MME ELECTRIC HOLDINGS CO., LTD. Address before: 721013, Shaanxi, Baoji Province high-tech Eastern District, Ma Ying East Star Industrial Park, Baoji Sifang Huaneng Electric Co., Ltd. Applicant before: Tian Limin |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20200615 |