CN201434784Y - Novel automatic coal powder constant-speed sampling device - Google Patents
Novel automatic coal powder constant-speed sampling device Download PDFInfo
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- CN201434784Y CN201434784Y CN2009200298922U CN200920029892U CN201434784Y CN 201434784 Y CN201434784 Y CN 201434784Y CN 2009200298922 U CN2009200298922 U CN 2009200298922U CN 200920029892 U CN200920029892 U CN 200920029892U CN 201434784 Y CN201434784 Y CN 201434784Y
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- 238000005070 sampling Methods 0.000 title claims abstract description 94
- 239000003245 coal Substances 0.000 title claims abstract description 86
- 239000000843 powder Substances 0.000 title claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000000428 dust Substances 0.000 claims abstract description 10
- 239000002817 coal dust Substances 0.000 claims description 33
- 230000003189 isokinetic effect Effects 0.000 claims description 18
- 230000033228 biological regulation Effects 0.000 abstract description 5
- 238000001914 filtration Methods 0.000 abstract 3
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 19
- 238000000034 method Methods 0.000 description 12
- 239000002245 particle Substances 0.000 description 6
- 238000009826 distribution Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a novel automatic coal powder constant-speed sampling device which causes rational burning regulation of boiler and prevents aimless regulation. The structure of the utility model is described as follows: the novel automatic coal powder constant-speed sampling device comprises an automatic coal powder sampling device provided in a primary wind pipe; the automatic coal powder sampling device is connected with a dust removing device which is connected with a coal powder sampling pot; the dust removing device is connected with a wind suction amount measuring device; the wind suction amount measuring device is connected with a controller through a differential pressure transmitter A; the controller is connected with the automatic coal powder sampling device througha differential pressure transmitter B; the wind suction amount measuring device is connected with a negative pressure generator which is connected with an electromagnetic regulation valve and a heating device; the heating device is connected with an air filtering device through a pressure stabilizing device; the air filtering device is supplied with compressed air; simultaneously the electromagnetic regulation valve and the heating device are respectively connected with a controller; and the air filtering device is connected with the automatic coal powder sampling device through an automatic valve device.
Description
Technical field
The utility model designs a kind of new type auto isokinetic sample of pulverized coal device.
Background technology
Fineness of pulverized coal is the important parameter that coal-fired station burning is adjusted, and the safety and economic operation of boiler is had significant impact.Genset originally adopts the ball type pulverizer system mostly, and fineness of pulverized coal is easy to obtain from the powder storehouse.In recent years, along with the progressively raising of country to environmental protection of thermal power generation unit and energy-conservation requirement, adopt the large-scale unit of unit pulverized-coal system to obtain widespread use, the fineness of pulverized coal monitoring is puzzlement boiler of power plant technician's a difficult problem always in the unit pulverized-coal system.In unit pulverized-coal system, a coal pulverizer has many outlet coal pipes simultaneously, and the coal powder density of each pulverized coal channel is different.If the coal powder density deviation is excessive, can influence the coal-air ratio of each burner, cause problems such as burning efficiency decline, combustion instability, slagging scorification, Nox discharging increase.The size of pulverized coal particle also has considerable influence to burning and coal pulverizer unit consumption simultaneously, and the coal dust problem of sampling becomes the gordian technique of power plant's reduction of discharging gradually and comes into one's own.
All carrying out the research of coal dust line Measurement Technique both at home and abroad at present, as microwave method, capacitance method, excusing from death ripple method etc.But these methods are difficult for accurately, and versatility and practicality are not strong.Because do not have ripe line Measurement Technique, power plant can't carry out continuous monitoring to the coal dust operation conditions in the unit pulverized-coal system in operational process always.The method that present power plant generally adopts is directly from Dual-Phrase Distribution of Gas olid pulverized coal particle to be taken a sample, and to determine coal powder density and fineness of pulverized coal, therefore how obtaining representative pulverized coal sample from an airduct road becomes key.Isokinetic sampling's method is generally adopted in present coal dust sampling, and the unit pulverized-coal system coal fines sampling apparatus of present domestic application has following several form:
One, De Guo AKOMA static balance formula coal fines sampling apparatus
Adopt static balance formula isokinetic sampling method, can realize the total cross-section sampling to pulverized coal channel, the coal dust representativeness is good, but it costs an arm and a leg, and is fit to experimental study, is not suitable for power plant's rig-site utilization.
Two, the PFC coal fines sampling apparatus of Denmark
Belong to portable coal powder sampler, adopt prediction type isokinetic sampling method, its main deficiency is to have rotating machinery, complex structure, and the equipment failure rate height is fit to experimental study.
Three, fixed coal fines sampling apparatus
Now a lot of Installation in Plant fixed coal fines sampling apparatus, it is simple in structure, and is easy to operate, shortcoming is really to realize constant speed, institute's pulverized coal sample of getting is representative poor, and equipment gets rusty easily bite, stopple coupon obstruction and can't use.
Summary of the invention
The purpose of this utility model is exactly for fear of problems such as sampler bite, stopple coupon coal dust depositions, a kind of test data that can obtain true and reliable coal powder density and fineness of pulverized coal is provided, it is with good grounds that the burning adjustment of boiler is accomplished, avoids the new type auto isokinetic sample of pulverized coal device of advantages such as blindly adjustment.
For achieving the above object, the utility model adopts following technical scheme:
A kind of new type auto isokinetic sample of pulverized coal device, it comprises and is arranged on the automatic coal fines sampling apparatus in the airduct road one time, and coal fines sampling apparatus is connected with dust arrester automatically, and dust arrester is connected with the coal dust sampling jar; Dust arrester is connected with the suction apparatus for measuring air quantity by connecting tube; The suction apparatus for measuring air quantity is connected with controller by differential pressure transmitter A on the one hand, and controller is connected with differential pressure transmitter B, and differential pressure transmitter B is connected with automatic coal fines sampling apparatus; The suction apparatus for measuring air quantity also is connected with depression generator on the other hand, depression generator is connected with heating arrangement with solenoid valve, heating arrangement then is connected with air filter by stable-pressure device, air filter connects pressurized air, and solenoid valve also is connected with controller respectively with heating arrangement simultaneously; Air filter also is connected with automatic coal fines sampling apparatus by the automatic valve device.
Described automatic coal fines sampling apparatus comprises combined coal powder sampling gun, electronic tight socket and cylinder, the combined coal powder sampling gun is arranged in airduct road by electronic tight socket, the combined coal powder sampling gun also is connected with cylinder, and cylinder is installed on the fixed support.
Described dust arrester is a cyclone separator, and the cyclone separator bottom is connected with the coal dust sampling jar, and the cyclone separator top is connected with the suction apparatus for measuring air quantity by connecting tube.
Described differential pressure transmitter B is connected with combined coal powder sampling gun endpiece.
Described depression generator is a negative pressure generator; Described heating arrangement is an air heater; Described stable-pressure device is a pressure maintaining valve; Described air filter is an air strainer.
Described automatic valve device is electromagnetic switch valve A and electromagnetic switch valve B, and wherein electromagnetic switch valve A is connected with electronic tight socket, and electromagnetic switch valve B is connected with cylinder.
In the utility model, coal fines sampling apparatus can be divided into sampling part and control section substantially, mainly is made up of combined coal powder sampling gun, electronic tight socket, cyclone separator, coal dust sampling jar, connecting tube, fixed support, cylinder, suction apparatus for measuring air quantity, negative pressure generator, pressure maintaining valve, air strainer, air heater, controller, differential pressure transmitter A, differential pressure transmitter B, solenoid valve, electromagnetic switch valve A and electromagnetic switch valve B.The combined coal powder sampling gun effect be wind wind speed in the measuring channel on the one hand, be that pulverized coal particle is extracted from Dual-Phrase Distribution of Gas olid on the other hand.The effect of electronic tight socket is to open after feeding pressurized air, makes the coal dust sampling gun enter pipeline, prevents during sampling that coal dust from spraying in pipeline, closes after sampling finishes.The effect of cyclone separator is that pulverized coal particle is separated from Dual-Phrase Distribution of Gas olid.The effect of coal dust sampling jar is the coal dust that storage separates.The effect of connecting tube is that the suction apparatus for measuring air quantity with the separator outlet of sampling part and control section couples together.Support bracket fastened effect is that cylinder is fixed and is welded on the pulverized coal channel.The effect of cylinder is before sampling the coal dust sampling gun to be sent into the airduct road one time, takes out in pipeline after sampling finishes.The effect of suction apparatus for measuring air quantity is to measure the suction air quantity.The effect of negative pressure generator is to produce enough big negative pressure by pressurized air.The effect of pressure maintaining valve is that the compressed air pressure before the negative pressure generator is stabilized in 0.6～0.8kg/cm
2The effect of air strainer is impurity and the water of removing in the pressurized air.The effect of air heater is a pre-hot compressed air before the coal dust sampling, dewfall when preventing the sampling pipe sampling.The effect of controller is automatic sampling and the isokinetic sampling who realizes coal fines sampling apparatus.The effect of differential pressure transmitter A is to measure to import controller after the primary air velocity differential pressure signal is converted into the normalized current signal.The effect of differential pressure transmitter B is to measure to import controller after suction air quantity differential pressure signal is converted into the normalized current signal.The effect of solenoid valve is a size of accepting the Signal Regulation rate of air sucked in required of controller.The effect of electromagnetic switch valve A is an opening and closing tight socket pressurized air.The effect of electromagnetic switch valve B is an opening and closing cylinder pressurized air.
The course of work and principle are as described below: before the coal dust sampling, whole sampling line feeds pressurized air, opens air heater sampling line is carried out preheating, closes air heater after reaching design temperature.Controller is opened solenoid valve B automatically, and cylinder drive sampling gun enters the airduct road one time in the mode of stepping, and the mode with stepping withdraws from then, finishes the coal dust sampling process one time.After the coal dust sampling gun enters airduct road, pressurized air enters negative pressure generator through air strainer, voltage stabilizer and solenoid valve, produce bigger negative pressure, be malleation in the airduct road, thereby between airduct road and negative pressure generator, produce pressure reduction, breeze airflow enters the coal dust sampling gun by a plurality of sample taps that sampling goes to the cross section, upper edge to arrange under the effect of differential pressure, wind powder mixture tangentially enters cyclone separator, pulverized coal particle is separated and falls into the coal dust sampling jar, and weary gas enters atmosphere after entering negative pressure generator by the suction wind measuring device.The pulverized coal particle that enters from an airduct road might not be representative, promptly differ and truly reflect fineness of pulverized coal situation in airduct road surely, have only when the pumping velocity of sample tap on the coal dust sampling gun equates with wind speed in the pipeline, the coal dust sample of taking-up is just representative.The combined coal powder sampling gun is the interior mean wind speed of measuring channel simultaneously, to manage interior air volume signal by air quantity differential pressure transmitter in managing and send into controller, after aspirating air quantity wind measuring device measurement suction air quantity simultaneously, by suction air quantity differential pressure transmitter air volume signal is also sent into controller, two air volume signals compare in controller.If the suction wind speed is less than wind speed in the pipe, controller will leave big solenoid valve, thereby the negative pressure that increases negative pressure generator increases until equating with wind speed in the pipe suction wind speed; If the suction wind speed is greater than wind speed in the pipe, controller will turn down solenoid valve, thereby the negative pressure that reduces negative pressure generator reduces until equating with wind speed in the pipe suction wind speed.Under the control of controller, wind speed was identical all the time in the coal dust sampling gun aspirated wind speed and manages in sample time, had really realized the isokinetic sampling, and institute's coal dust sample representativeness of getting is good, and fineness of pulverized coal is true and reliable.
The beneficial effects of the utility model are:
1 pair of coal dust sampling gun has carried out structure optimization, makes that wind speed is complementary in coal dust sampling gun sample tap wind speed and the airduct road, makes each sample tap all realize the isokinetic sampling as far as possible.
2 adopt the combined coal powder sampling guns, can carry out measuring wind speed in coal dust sampling and the airduct road simultaneously.
3 real realization isokinetic samplings.Owing to installed apparatus for measuring air quantity and self-checking device additional, can realize the isokinetic sampling, greatly improved sample representation and accuracy, can provide reliable basis to the burning adjustment of boiler.
4 owing to there is not rotating machinery, do not have equipment bite problem.
5 owing to adopted air heater that sampling line is carried out preheating, prevents coal dust sampling line dewfall and coal dust deposition, prolonged service life of equipment.
6 have really realized automatic sampling, have improved the sampling environment, have reduced labour intensity.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Wherein, 1. combined coal powder sampling gun, 2. electronic tight socket, 3. cyclone separator, 4. coal dust sampling jar, 5. connecting tube, 6. fixed support, 7. cylinder, 8. suction apparatus for measuring air quantity, 9. negative pressure generator, 10. pressure maintaining valve, 11. air strainers, 12. air heaters, 13. controllers, 14. differential pressure transmitter A, 15. differential pressure transmitter B, 16. solenoid valves, 17. electromagnetic switch valve A, 18. electromagnetic switch valve B, 19. airduct roads.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Among Fig. 1, it comprises the automatic coal fines sampling apparatus that is arranged in airduct road 19, automatically coal fines sampling apparatus comprises combined coal powder sampling gun 1, electronic tight socket 2 and cylinder 7, combined coal powder sampling gun 1 is arranged in airduct road 19 by electronic tight socket 2, combined coal powder sampling gun 1 also is connected with cylinder 7, and cylinder 7 is installed on the fixed support 6.Combined coal powder sampling gun 1 is connected with cyclone separator 3, and the bottom of cyclone separator 3 is connected with coal dust sampling jar 4.The top of cyclone separator 3 then is connected with suction apparatus for measuring air quantity 8 by connecting tube 5, suction apparatus for measuring air quantity 8 process differential pressure transmitter A14 are connected with controller 13, controller 13 is connected with differential pressure transmitter B15, differential pressure transmitter B15 be connected with combined coal powder sampling gun 1 endpiece.Suction apparatus for measuring air quantity 8 also is connected with negative pressure generator 9, and 9 of negative pressure generators are connected with air heater 12 with solenoid valve 16, and solenoid valve 16 is connected with controller 13 respectively with air heater 12.Air heater 12 is connected with pressure maintaining valve 10, and pressure maintaining valve 10 is connected with air strainer 11, and air strainer 11 connects pressurized air.Air strainer 11 also is connected with electronic tight socket 2 by electromagnetic switch valve A17 respectively simultaneously, is connected with cylinder 7 by electromagnetic switch valve B18.
Claims (6)
1. a new type auto isokinetic sample of pulverized coal device is characterized in that, it comprises the automatic coal fines sampling apparatus that is arranged in the airduct road (19), and coal fines sampling apparatus is connected with dust arrester automatically, and dust arrester is connected with coal dust sampling jar (4); Dust arrester is connected with suction apparatus for measuring air quantity (8) by connecting tube (5); Suction apparatus for measuring air quantity (8) is connected with controller (13) by differential pressure transmitter A (14) on the one hand, and controller (13) is connected with differential pressure transmitter B (15), and differential pressure transmitter B (15) is connected with automatic coal fines sampling apparatus; Suction apparatus for measuring air quantity (8) also is connected with depression generator on the other hand, depression generator is connected with heating arrangement with solenoid valve (16), heating arrangement then is connected with air filter by stable-pressure device, air filter connects pressurized air, and solenoid valve (16) also is connected with controller (13) respectively with heating arrangement simultaneously; Air filter also is connected with automatic coal fines sampling apparatus by the automatic valve device.
2. new type auto isokinetic sample of pulverized coal device as claimed in claim 1, it is characterized in that, described automatic coal fines sampling apparatus comprises combined coal powder sampling gun (1), electronic tight socket (2) and cylinder (7), combined coal powder sampling gun (1) is arranged in the airduct road (19) by electronic tight socket (2), combined coal powder sampling gun (1) also is connected with cylinder (7), and cylinder (7) is installed on the fixed support (6).
3. new type auto isokinetic sample of pulverized coal device as claimed in claim 1, it is characterized in that, described dust arrester is cyclone separator (3), cyclone separator (3) bottom is connected with coal dust sampling jar (4), and cyclone separator (3) top is connected with suction apparatus for measuring air quantity (8) by connecting tube (5).
4. new type auto isokinetic sample of pulverized coal device as claimed in claim 1 or 2 is characterized in that, described differential pressure transmitter B (15) is connected with combined coal powder sampling gun (1) endpiece.
5. new type auto isokinetic sample of pulverized coal device as claimed in claim 1 is characterized in that, described depression generator is negative pressure generator (9); Described heating arrangement is air heater (12); Described stable-pressure device is pressure maintaining valve (10); Described air filter is air strainer (11).
6. as claim 1 or 5 described new type auto isokinetic sample of pulverized coal devices, it is characterized in that, described automatic valve device is electromagnetic switch valve A (17) and electromagnetic switch valve B (18), wherein electromagnetic switch valve A (17) is connected with electronic tight socket (2), and electromagnetic switch valve B (18) is connected with cylinder (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009200298922U CN201434784Y (en) | 2009-07-24 | 2009-07-24 | Novel automatic coal powder constant-speed sampling device |
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| CN2009200298922U CN201434784Y (en) | 2009-07-24 | 2009-07-24 | Novel automatic coal powder constant-speed sampling device |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095605A (en) * | 2010-11-22 | 2011-06-15 | 山东电力研究院 | Double-regulation static pressure unbalanced coal dust constant-speed sampling system and method of system |
| CN102478464A (en) * | 2010-11-30 | 2012-05-30 | 美盛化肥(烟台)有限公司 | Automatic sampler |
| CN102928258A (en) * | 2012-11-26 | 2013-02-13 | 山东电力集团公司电力科学研究院 | Fixed type flying ash sampling device of coal-fired boiler and method |
| CN104502162A (en) * | 2014-12-31 | 2015-04-08 | 郑州光力科技股份有限公司 | Dust sampler and dust concentration calibrating device using dust sampler |
| CN105510625A (en) * | 2015-11-27 | 2016-04-20 | 山东电力研究院 | Wind speed measurement system and method of pulverized-coal-included airflow of pulverized coal feeding pipe of coal-fired boiler |
| CN105865537A (en) * | 2016-05-25 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | Device for measuring flow of pulverized coal conveyed by wind |
| CN106323726A (en) * | 2016-10-09 | 2017-01-11 | 上海电力学院 | Automatic coal dust screening device |
| CN106442008A (en) * | 2016-10-28 | 2017-02-22 | 上海电力学院 | Push-pull portable constant speed pulverized coal sampling device |
| CN107589053A (en) * | 2017-11-07 | 2018-01-16 | 北京华清茵蓝科技有限公司 | Automatic sampling fineness of pulverized coal On-line Measuring Method and measurement apparatus |
| CN107664588A (en) * | 2017-11-07 | 2018-02-06 | 北京华清茵蓝科技有限公司 | Isokinetic sample of pulverized coal method and sampler |
| CN109459277A (en) * | 2018-11-22 | 2019-03-12 | 国网浙江省电力有限公司电力科学研究院 | Constant speed control cabinet and its application method applied to portable coal powder sampler |
| CN113984454A (en) * | 2021-10-28 | 2022-01-28 | 西安热工研究院有限公司 | Pulverized coal sampling system and method for improving pulverized coal fineness sampling accuracy and environmental protection |
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2009
- 2009-07-24 CN CN2009200298922U patent/CN201434784Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095605B (en) * | 2010-11-22 | 2012-12-19 | 山东电力研究院 | Double-regulation static pressure unbalanced coal dust constant-speed sampling system and method of system |
| CN102095605A (en) * | 2010-11-22 | 2011-06-15 | 山东电力研究院 | Double-regulation static pressure unbalanced coal dust constant-speed sampling system and method of system |
| CN102478464A (en) * | 2010-11-30 | 2012-05-30 | 美盛化肥(烟台)有限公司 | Automatic sampler |
| CN102928258A (en) * | 2012-11-26 | 2013-02-13 | 山东电力集团公司电力科学研究院 | Fixed type flying ash sampling device of coal-fired boiler and method |
| CN102928258B (en) * | 2012-11-26 | 2015-10-28 | 山东电力集团公司电力科学研究院 | A kind of fixed fly ash sampling device of coal-burning boiler and method |
| CN104502162B (en) * | 2014-12-31 | 2017-07-07 | 郑州光力科技股份有限公司 | Dust sampler and the dust concentration caliberating device using the dust sampler |
| CN104502162A (en) * | 2014-12-31 | 2015-04-08 | 郑州光力科技股份有限公司 | Dust sampler and dust concentration calibrating device using dust sampler |
| CN105510625A (en) * | 2015-11-27 | 2016-04-20 | 山东电力研究院 | Wind speed measurement system and method of pulverized-coal-included airflow of pulverized coal feeding pipe of coal-fired boiler |
| CN105865537A (en) * | 2016-05-25 | 2016-08-17 | 中国大唐集团科学技术研究院有限公司西北分公司 | Device for measuring flow of pulverized coal conveyed by wind |
| CN106323726A (en) * | 2016-10-09 | 2017-01-11 | 上海电力学院 | Automatic coal dust screening device |
| CN106323726B (en) * | 2016-10-09 | 2023-08-18 | 上海电力学院 | Automatic pulverized coal screening device |
| CN106442008A (en) * | 2016-10-28 | 2017-02-22 | 上海电力学院 | Push-pull portable constant speed pulverized coal sampling device |
| CN107589053A (en) * | 2017-11-07 | 2018-01-16 | 北京华清茵蓝科技有限公司 | Automatic sampling fineness of pulverized coal On-line Measuring Method and measurement apparatus |
| CN107664588A (en) * | 2017-11-07 | 2018-02-06 | 北京华清茵蓝科技有限公司 | Isokinetic sample of pulverized coal method and sampler |
| CN109459277A (en) * | 2018-11-22 | 2019-03-12 | 国网浙江省电力有限公司电力科学研究院 | Constant speed control cabinet and its application method applied to portable coal powder sampler |
| CN109459277B (en) * | 2018-11-22 | 2024-04-05 | 国网浙江省电力有限公司电力科学研究院 | Constant-speed control box applied to portable coal dust sampling device and application method of constant-speed control box |
| CN113984454A (en) * | 2021-10-28 | 2022-01-28 | 西安热工研究院有限公司 | Pulverized coal sampling system and method for improving pulverized coal fineness sampling accuracy and environmental protection |
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| C14 | Grant of patent or utility model | ||
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Owner name: STATE ELECTRIC NET CROP. Effective date: 20130315 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130315 Address after: 250100, No. 500, South Second Ring Road, Shizhong District, Shandong, Ji'nan Patentee after: Shandong Research Inst. of Electric Power Patentee after: State Grid Corporation of China Address before: 250100, No. 500, South Second Ring Road, Shizhong District, Shandong, Ji'nan Patentee before: Shandong Research Inst. of Electric Power |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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