CN201838507U - Vacuum circuit breaker and tripping cushioning device thereof - Google Patents
Vacuum circuit breaker and tripping cushioning device thereof Download PDFInfo
- Publication number
- CN201838507U CN201838507U CN2010205235922U CN201020523592U CN201838507U CN 201838507 U CN201838507 U CN 201838507U CN 2010205235922 U CN2010205235922 U CN 2010205235922U CN 201020523592 U CN201020523592 U CN 201020523592U CN 201838507 U CN201838507 U CN 201838507U
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- Prior art keywords
- piston rod
- contact spring
- vacuum circuit
- end cover
- spring arrangement
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- 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.)
- Expired - Lifetime
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- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 239000000872 buffer Substances 0.000 claims description 37
- 230000003044 adaptive effect Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000006173 Good's buffer Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The utility model discloses a tripping cushioning device for a vacuum circuit breaker, comprising a contact spring device for being in transmission connection with a transmission rod of a movable contact. The contact spring device comprises a piston rod, and the upper end of the piston rod is used for being in transmission connection with the transmission rod of the movable contact; and a cushioning device which is in transmission connection with the piston rod of the contact spring device is arranged below the contact spring device. When the tripping cushioning device for the vacuum circuit breaker works, the cushioning device is arranged below the contact spring device, so that the cushioning device acts on the movable contact directly by the contact spring device. When the vacuum circuit breaker carrys out ripping operation, compared with the original design of the contact spring device, an inner crankarm, a transmission shaft and an outer crankarm, for the existing tripping cushioning device, the structure is simple, the cushioning effect is good, the parts such as the outer crankarm, rollers and the like are omitted, the production cost is saved, and due to less parts, the assembling efficiency is increased, and the fault rate of the tripping cushioning device is also reduced.
Description
Technical field
The utility model relates to the vacuum circuit-breaker field, particularly vacuum circuit-breaker splitting lock cushioning device.
Background technology
As Fig. 1, Figure 2 shows that vacuum circuit-breaker splitting lock cushioning device in the market, in the single-stage driving structure 4 of vacuum circuit-breaker, buffer units 3 such as oil bumper or valve rubber buffer are fixed on the below of the outer connecting lever 1 of single-stage driving axle, the vacuum circuit-breaker separating brake is arranged on the roller 2 of outer connecting lever 1 end latter stage and just in time beats on buffer unit 3,3 pairs of moving contacts of buffer unit and 5 cushioning effects of contact spring arrangement, the drive link 9 that is in transmission connection with moving contact is housed in single-stage sleeve pipe 5, connecting lever 8 in being fixed with on power transmission shaft, interior connecting lever 8 is in transmission connection by the drive link 9 of contact spring arrangement 7 with moving contact, buffer units such as oil bumper or valve rubber buffer 3 are by outer connecting lever 1, power transmission shaft, interior connecting lever 8 cushions through 7 pairs of moving contacts of contact spring arrangement again, when the sort buffer mode is applied in voltage levels, because operating work is big, the opening velocity height, though power transmission shaft and interior connecting lever act on deceleration and spacing on the buffer unit by outer connecting lever, but moving contact often still can produce overshoot and bounce-back by the compression contacts spring because of kinetic energy is excessive, thereby influence the operate as normal of vacuum circuit-breaker, and the drive disk assembly in the contact spring arrangement is damaged, influence the useful life of drive disk assembly.
The utility model content
The purpose of this utility model provides a kind of vacuum circuit-breaker, occurs the technical problem of overshoot and bounce-back easily at separating brake moving contact in latter stage with vacuum circuit-breaker in the solution prior art; The utility model also provides and the corresponding splitting lock cushioning device of above-mentioned vacuum circuit-breaker simultaneously.
Vacuum circuit-breaker provided by the utility model with the technical scheme of splitting lock cushioning device is: a kind of vacuum circuit-breaker splitting lock cushioning device, comprise and be used for the contact spring arrangement that the drive link with moving contact is in transmission connection, this contact spring arrangement comprises that the upper end is used for the piston rod that the drive link with moving contact is in transmission connection, and is provided with the buffer unit that the piston rod with the contact spring arrangement is in transmission connection below described contact spring arrangement.
That the lower end slip cap of the piston rod of described contact spring arrangement is equipped with tubular and at the bottom of the tube of top, be provided with the piston joint that is used for the suitable installing hole of piston rod, the bottom of described piston rod is provided with and is used for the shaft shoulder adaptive with piston joint, the end face roof pressure down that the upper surface of this shaft shoulder is used at the bottom of the top tube with described piston joint cooperates, slip cap is equipped with bottom end cover in the bottom of piston rod, end face roof pressure up at the bottom of the top tube of the lower surface of this bottom end cover and described piston joint cooperates, the adjustable upper end cover that is installed with on the top of piston rod, on the described piston rod on described, be set with spring assembly between the bottom end cover, this spring assembly and described on, the corresponding end-faces roof pressure of bottom end cover cooperates, be provided with long slot bore with the corresponding section of piston joint on the described piston rod, slidable fit is useful on and drives the bearing pin that connecting lever is in transmission connection in the described long slot bore, on the barrel of described piston joint, be provided with the installing hole that is used to install bearing pin, below piston joint, be installed with buffer unit in the lower end of described piston rod with the long slot bore corresponding section.
Described upper end cover is installed on the described piston rod by screw thread is adjustable.
Described buffer unit is an oil bumper, is provided with the piston that is connected with described piston rod in this oil bumper, and the housing of this oil bumper is installed in the below of described contact spring arrangement.
Described buffer unit is the rubber blanket buffer.
When the utility model vacuum circuit-breaker was worked with the splitting lock cushioning device, by buffer unit being arranged on contact spring arrangement below, buffer unit acted directly on the moving contact by the contact spring arrangement.When the vacuum breaker open operation is operated, compare original design by contact spring arrangement, interior connecting lever, power transmission shaft and outer connecting lever, existing splitting lock cushioning device simple in structure, good buffer effect, save parts such as outer connecting lever, roller, saved production cost, and because parts are less, efficiency of assembling improves, and the failure rate of splitting lock cushioning device also is minimized.
The technical scheme of vacuum circuit-breaker provided by the utility model is: a kind of vacuum circuit-breaker, comprise the splitting lock cushioning device that drives connecting lever and be in transmission connection by the driving connecting lever, this splitting lock cushioning device comprises and is used for the contact spring arrangement that the drive link with moving contact is in transmission connection, this contact spring arrangement comprises that the upper end is used for the piston rod that the drive link with moving contact is in transmission connection, and is provided with the buffer unit that the piston rod with the contact spring arrangement is in transmission connection below described contact spring arrangement.
That the lower end slip cap of the piston rod of described contact spring arrangement is equipped with tubular and at the bottom of the tube of top, be provided with the piston joint that is used for the suitable installing hole of piston rod, the bottom of described piston rod is provided with and is used for the shaft shoulder adaptive with piston joint, the end face roof pressure down that the upper surface of this shaft shoulder is used at the bottom of the top tube with described piston joint cooperates, slip cap is equipped with bottom end cover in the bottom of piston rod, end face roof pressure up at the bottom of the top tube of the lower surface of this bottom end cover and described piston joint cooperates, the adjustable upper end cover that is installed with on the top of piston rod, on the described piston rod on described, be set with spring assembly between the bottom end cover, this spring assembly and described on, the corresponding end-faces roof pressure of bottom end cover cooperates, be provided with long slot bore with the corresponding section of piston joint on the described piston rod, slidable fit is useful on and drives the bearing pin that connecting lever is in transmission connection in the described long slot bore, on the barrel of described piston joint, be provided with the installing hole that is used to install bearing pin, below piston joint, be installed with buffer unit in the lower end of described piston rod with the long slot bore corresponding section.
Described upper end cover is installed on the described piston rod by screw thread is adjustable.
Described buffer unit is an oil bumper, is provided with the piston that is connected with described piston rod in this oil bumper, and the housing of this oil bumper is installed in the below of described contact spring arrangement.
Described buffer unit is the rubber blanket buffer.
The utility model vacuum circuit-breaker is set directly at buffer unit the below of contact spring arrangement, the drive link of moving contact is directly cushioned by buffer unit by the contact spring arrangement, the buffering effect of buffer unit is improved like this, effectively suppressed overshoot and the bounce-back of moving contact, thereby guaranteed the vacuum circuit-breaker operate as normal in separating brake appearance in latter stage.
Description of drawings
Fig. 1 be in the prior art vacuum circuit-breaker with the structural representation of splitting lock cushioning device;
Fig. 2 is a vacuum circuit-breaker single-stage driving structure cutaway view among Fig. 1;
Fig. 3 be in the utility model vacuum circuit-breaker with the structural representation of a kind of embodiment of splitting lock cushioning device;
Fig. 4 is the structural representation of contact spring arrangement among Fig. 3;
Fig. 5 is the structural representation of a kind of embodiment of vacuum circuit-breaker in the utility model.
Embodiment
As Fig. 3, shown in Figure 4, a kind of vacuum circuit-breaker splitting lock cushioning device, comprise and be used for the contact spring arrangement 10 that the drive link with moving contact is in transmission connection, this contact spring arrangement 10 comprises that the upper end is used for the piston rod 21 that the drive link with moving contact is in transmission connection, the lower end slip cap of the piston rod 21 of contact spring arrangement be equipped with tubular and be provided with the piston joint 25 that is used for the suitable installing hole of piston rod at the bottom of the tube of top, the bottom of piston rod 21 is provided with and is used for the shaft shoulder 28 adaptive with piston joint 25, the end face roof pressure down that the upper surface of this shaft shoulder 28 is used at the bottom of the top tube with piston joint 25 cooperates, slip cap is equipped with bottom end cover 24 in the bottom of piston rod 21, end face roof pressure up at the bottom of the top tube of the lower surface of this bottom end cover 24 and described piston joint 25 cooperates, on piston rod 21 by the adjustable upper end cover 22 that is installed with of screw thread, upper end cover 22 can be adjusted on axially at piston rod 21, on piston rod 21 in last, be provided with spring assembly 23 between the bottom end cover, this spring assembly and described on, the corresponding end-faces roof pressure of bottom end cover cooperates, be provided with long slot bore 26 with the corresponding section of piston joint 25 on the piston rod 21, slidable fit is useful on and drives the bearing pin 27 that connecting lever 11 is in transmission connection in the described long slot bore 26, on the barrel of piston joint 25, be provided with the installing hole that is used to install bearing pin with long slot bore 26 opposite positions, after the assembling of finishing the contact spring arrangement, installing hole aligns with the lower edge of long slot bore 26 usually, below the contact spring arrangement, be provided with the oil bumper 12 that the piston rod 21 with the contact spring arrangement is in transmission connection as buffer unit, be provided with in oil bumper 12 inside and be used for the piston that is connected with piston rod, the housing of oil bumper is installed in the below of piston joint.
In the above-described embodiments, the buffer unit of piston-rod lower end setting is an oil bumper 12, also can adopt the rubber blanket buffer when specifically implementing.
In the above-described embodiments, spring assembly is a spring, and when specifically implementing, spring assembly also can be the complex spring of being made up of inner spring and outer spring that is sleeved on the piston rod.
During concrete enforcement, upper end cover also can adopt adjustable being sleeved on the piston rod of setting firmly of other modes, such as a series of location hole axially being set at the piston rod upper end edge, upper end cover circumferentially be provided with piston rod on suitable being used to of location hole the installing hole of pin is installed, after upper end cover is sleeved on the piston rod, install pin in the installing hole on upper end cover, this moment, pin just played the fixedly effect of upper end cover, when needs are adjusted upper end cover in the position that piston rod makes progress, pin is extracted, upper end cover is adjusted to the relevant position, penetrates pin again and gets final product.
When the vacuum circuit breaker closes a floodgate, driving connecting lever moves upward by bearing pin drive piston joint, piston joint drives piston rod and moves upward by bottom end cover, spring assembly, upper end cover, thereby realize dynamic and static contact contact, connecting lever continuation drive bearing pin moves upward along the long slot bore on the piston rod then, the compression spring, overtravel in covering long slot bore, the effect that this process has promptly reached the buffering control spring of closing a floodgate has guaranteed the combined floodgate contact confining force that contact is final again, and the spring energy stored helps branch kinetic energy for separating brake provides again simultaneously; When vacuum circuit-breaker carries out sub-switching operation; driving connecting lever moves downward by the long slot bore of bearing pin drive piston joint along piston rod; the potential energy that this moment, spring stored discharges; make that piston joint quickens to move downward; until covering overtravel; this moment, dynamic and static contact disconnected; but because the speed in separating brake latter stage is bigger; piston rod moves downward continuing like this; the buffer unit of piston-rod lower end just played the prevention piston rod effect of overshoot and bounce-back occurs in piston joint this moment, thus better protection vacuum circuit-breaker.
As Fig. 5, Fig. 3, shown in Figure 4, a kind of vacuum circuit-breaker, comprise the splitting lock cushioning device that drives connecting lever 11 and be in transmission connection by driving connecting lever 11, wherein the splitting lock cushioning device is arranged in the single-stage driving structure 30 on the vacuum circuit-breaker, wherein the structure of splitting lock cushioning device splitting lock cushioning device as shown in Figure 3, Figure 4.
Claims (10)
1. vacuum circuit-breaker splitting lock cushioning device, comprise and be used for the contact spring arrangement that the drive link with moving contact is in transmission connection, this contact spring arrangement comprises that the upper end is used for the piston rod that the drive link with moving contact is in transmission connection, and is characterized in that: be provided with the buffer unit that the piston rod with the contact spring arrangement is in transmission connection below described contact spring arrangement.
2. vacuum circuit-breaker splitting lock cushioning device according to claim 1, it is characterized in that: that the lower end slip cap of the piston rod of described contact spring arrangement is equipped with tubular and at the bottom of the tube of top, be provided with the piston joint that is used for the suitable installing hole of piston rod, the bottom of described piston rod is provided with and is used for the shaft shoulder adaptive with piston joint, the end face roof pressure down that the upper surface of this shaft shoulder is used at the bottom of the top tube with described piston joint cooperates, slip cap is equipped with bottom end cover in the bottom of piston rod, end face roof pressure up at the bottom of the top tube of the lower surface of this bottom end cover and described piston joint cooperates, the adjustable upper end cover that is installed with on the top of piston rod, on the described piston rod on described, be set with spring assembly between the bottom end cover, this spring assembly and described on, the corresponding end-faces roof pressure of bottom end cover cooperates, be provided with long slot bore with the corresponding section of piston joint on the described piston rod, slidable fit is useful on and drives the bearing pin that connecting lever is in transmission connection in the described long slot bore, on the barrel of described piston joint, be provided with the installing hole that is used to install bearing pin, below piston joint, be installed with buffer unit in the lower end of described piston rod with the long slot bore corresponding section.
3. vacuum circuit-breaker splitting lock cushioning device according to claim 2 is characterized in that: described upper end cover is installed on the described piston rod by screw thread is adjustable.
4. according to claim 1 or 2 or 3 described vacuum circuit-breaker splitting lock cushioning devices, it is characterized in that: described buffer unit is an oil bumper, be provided with the piston that is connected with described piston rod in this oil bumper, the housing of this oil bumper is installed in the below of described contact spring arrangement.
5. according to claim 1 or 2 or 3 described vacuum circuit-breaker splitting lock cushioning devices, it is characterized in that: described buffer unit is the rubber blanket buffer.
6. vacuum circuit-breaker, comprise the splitting lock cushioning device that drives connecting lever and be in transmission connection by the driving connecting lever, this splitting lock cushioning device comprises and is used for the contact spring arrangement that the drive link with moving contact is in transmission connection, this contact spring arrangement comprises that the upper end is used for the piston rod that the drive link with moving contact is in transmission connection, and is characterized in that: be provided with the buffer unit that the piston rod with the contact spring arrangement is in transmission connection below described contact spring arrangement.
7. vacuum circuit-breaker according to claim 6, it is characterized in that: that the lower end slip cap of the piston rod of described contact spring arrangement is equipped with tubular and at the bottom of the tube of top, be provided with the piston joint that is used for the suitable installing hole of piston rod, the bottom of described piston rod is provided with and is used for the shaft shoulder adaptive with piston joint, the end face roof pressure down that the upper surface of this shaft shoulder is used at the bottom of the top tube with described piston joint cooperates, slip cap is equipped with bottom end cover in the bottom of piston rod, end face roof pressure up at the bottom of the top tube of the lower surface of this bottom end cover and described piston joint cooperates, the adjustable upper end cover that is installed with on the top of piston rod, on the described piston rod on described, be set with spring assembly between the bottom end cover, this spring assembly and described on, the corresponding end-faces roof pressure of bottom end cover cooperates, be provided with long slot bore with the corresponding section of piston joint on the described piston rod, slidable fit is useful on and drives the bearing pin that connecting lever is in transmission connection in the described long slot bore, on the barrel of described piston joint, be provided with the installing hole that is used to install bearing pin, below piston joint, be installed with buffer unit in the lower end of described piston rod with the long slot bore corresponding section.
8. vacuum circuit-breaker according to claim 7 is characterized in that: described upper end cover is installed on the described piston rod by screw thread is adjustable.
9. according to claim 6 or 7 or 8 described vacuum circuit-breakers, it is characterized in that: described buffer unit is an oil bumper, is provided with the piston that is connected with described piston rod in this oil bumper, and the housing of this oil bumper is installed in the below of described contact spring arrangement.
10. according to claim 6 or 7 or 8 described vacuum circuit-breakers, it is characterized in that: described buffer unit is the rubber blanket buffer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205235922U CN201838507U (en) | 2010-09-09 | 2010-09-09 | Vacuum circuit breaker and tripping cushioning device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205235922U CN201838507U (en) | 2010-09-09 | 2010-09-09 | Vacuum circuit breaker and tripping cushioning device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201838507U true CN201838507U (en) | 2011-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205235922U Expired - Lifetime CN201838507U (en) | 2010-09-09 | 2010-09-09 | Vacuum circuit breaker and tripping cushioning device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201838507U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779137A (en) * | 2014-01-16 | 2014-05-07 | 西安交通大学 | Integrated permanent magnet mechanism vacuum switch |
| CN103779138A (en) * | 2013-12-25 | 2014-05-07 | 上海正昊电力科技有限公司 | Arc extinguishing chamber contact spring assembly for 12kV high-voltage ring main unit |
| CN103887108A (en) * | 2014-01-26 | 2014-06-25 | 西安交通大学 | High voltage vacuum circuit breaker contact spring transmission device with high reliability |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN105448591A (en) * | 2015-11-27 | 2016-03-30 | 河南平芝高压开关有限公司 | Inhalation type arc extinguishing moving contact device and grounding switch using the same |
| CN107170638A (en) * | 2017-07-26 | 2017-09-15 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of AC high voltage vacuum breaker structure |
| CN107887224A (en) * | 2017-10-24 | 2018-04-06 | 山东泰开高压开关有限公司 | The divide-shut brake speed measurement apparatus and measuring method of a kind of vacuum circuit breaker |
| CN110085474A (en) * | 2019-05-10 | 2019-08-02 | 广东金晖隆开关有限公司 | A kind of closing device of vacuum interrupter |
| CN110994435A (en) * | 2019-12-05 | 2020-04-10 | 北京双杰电气股份有限公司 | Inflating cabinet |
| CN111180286A (en) * | 2020-01-06 | 2020-05-19 | 南电电气有限公司 | Plastic case circuit breaker with good power-on and power-off stability |
-
2010
- 2010-09-09 CN CN2010205235922U patent/CN201838507U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103779138A (en) * | 2013-12-25 | 2014-05-07 | 上海正昊电力科技有限公司 | Arc extinguishing chamber contact spring assembly for 12kV high-voltage ring main unit |
| CN103779137A (en) * | 2014-01-16 | 2014-05-07 | 西安交通大学 | Integrated permanent magnet mechanism vacuum switch |
| CN103887108A (en) * | 2014-01-26 | 2014-06-25 | 西安交通大学 | High voltage vacuum circuit breaker contact spring transmission device with high reliability |
| CN103887108B (en) * | 2014-01-26 | 2016-08-17 | 西安交通大学 | A kind of high-pressure vacuum breaker contact spring actuating device of high reliability |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN105448591B (en) * | 2015-11-27 | 2018-04-13 | 河南平芝高压开关有限公司 | The trigger device of air suction type arc extinguishing and the earthing switch using the device |
| CN105448591A (en) * | 2015-11-27 | 2016-03-30 | 河南平芝高压开关有限公司 | Inhalation type arc extinguishing moving contact device and grounding switch using the same |
| CN107170638A (en) * | 2017-07-26 | 2017-09-15 | 安徽中电兴发与鑫龙科技股份有限公司 | A kind of AC high voltage vacuum breaker structure |
| CN107170638B (en) * | 2017-07-26 | 2020-02-21 | 安徽中电兴发与鑫龙科技股份有限公司 | Alternating-current high-voltage vacuum circuit breaker structure |
| CN107887224A (en) * | 2017-10-24 | 2018-04-06 | 山东泰开高压开关有限公司 | The divide-shut brake speed measurement apparatus and measuring method of a kind of vacuum circuit breaker |
| CN107887224B (en) * | 2017-10-24 | 2023-09-01 | 山东泰开高压开关有限公司 | Switching-on and switching-off speed measuring device and measuring method of vacuum circuit breaker |
| CN110085474A (en) * | 2019-05-10 | 2019-08-02 | 广东金晖隆开关有限公司 | A kind of closing device of vacuum interrupter |
| CN110994435A (en) * | 2019-12-05 | 2020-04-10 | 北京双杰电气股份有限公司 | Inflating cabinet |
| CN110994435B (en) * | 2019-12-05 | 2021-01-26 | 北京双杰电气股份有限公司 | Inflating cabinet |
| CN111180286A (en) * | 2020-01-06 | 2020-05-19 | 南电电气有限公司 | Plastic case circuit breaker with good power-on and power-off stability |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: PINGGAO GROUP CO., LTD. Effective date: 20140314 Owner name: PINGGAO GROUP CO., LTD. JIANGSU ELECTRIC POWER COM Effective date: 20140314 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 467001 PINGDINGSHAN, HENAN PROVINCE TO: 100031 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140314 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Pinggao Group Co., Ltd. Patentee after: Jiangsu Electric Power Company Patentee after: State Grid Zhejiang Electric Power Company Address before: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee before: Pinggao Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110518 |
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| CX01 | Expiry of patent term |