CN102062713B - Device for testing high-temperature load-carrying properties of aluminum and aluminum alloy electric power apparatuses of power transmission line - Google Patents
Device for testing high-temperature load-carrying properties of aluminum and aluminum alloy electric power apparatuses of power transmission line Download PDFInfo
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- CN102062713B CN102062713B CN 201010582453 CN201010582453A CN102062713B CN 102062713 B CN102062713 B CN 102062713B CN 201010582453 CN201010582453 CN 201010582453 CN 201010582453 A CN201010582453 A CN 201010582453A CN 102062713 B CN102062713 B CN 102062713B
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Abstract
The invention discloses a device for testing high-temperature load-carrying properties of aluminum and aluminum alloy electric power apparatuses of a power transmission line, which comprises a control computer, a high-temperature box, an electric-hydraulic servo tensile testing machine, a load maintaining control system and a sample special fixture, wherein the high-temperature box is controlled by a temperature controller and arranged between an upper chuck and a lower chuck of the tensile testing machine; the special fixture comprises an upper pull rod and a lower pull rod, the upper end of the upper pull rod is provided with a support seat connected with the upper chuck of the tensile testing machine, the lower end of the upper pull rod penetrates through the high-temperature box, the end part of the upper pull rod is provided with a sample connecting member, the lower end of the lower pull rod is connected with the lower chuck of the tensile testing machine, the upper end of the lower pull rod penetrates into the high-temperature box and the top of the lower pull rod is provided with the sample connecting head. The device disclosed by the invention can meet that the sample is subject to long-time loading test at high temperature and the actual operation environment of power appliances is stimulated so as to obtain the strength loss rate of the power appliances under the condition of high-temperature loading, and provides relevant test data and design basis for the high-temperature resistant power appliances.
Description
Technical field
The present invention relates to technical field of measurement and test, relate in particular to the power equipment testing device for testing high-temperature loading property, specifically a kind of transmission line of electricity aluminium and aluminium alloy power equipment testing device for testing high-temperature loading property.
Background technology
At present the breakdown strength test to aluminium and aluminium alloy power equipment is carried out at normal temperatures in the concerned countries standard, but along with the improving constantly of transmission capacity, and the running temperature of wire and the power equipment supporting with it is also in continuous lifting.In the design standards of aluminium and aluminium alloy equipment, check when its intensity is 70 ℃ according to maximum operation (service) temperature, and when equipment matched with heat-resisting wire, its running temperature can reach 200 ℃, had approached the recrystallization temperature (softening temperature) of aluminium and aluminium alloy.And metal material is when at high temperature moving for a long time, and its intensity generally can constantly reduce along with the rising of temperature.
Existing both at home and abroad to the strength test testing machine of transmission line of electricity aluminium and aluminium alloy power equipment all for carrying out at normal temperatures, without high-temperature heating equipment, although the part test machine has load to keep function, but its load retention time is all shorter, can't keep for a long time higher load (more than 400 hours).Therefore existing test unit can't truly reflect the breakdown strength of power equipment under the actual motion state.
Summary of the invention
What the present invention will solve is the problems referred to above that prior art exists, aim to provide a kind of follow-on aluminium and aluminium alloy power equipment high-temperature loading property device, can carry out short time loading test to sample at normal temperatures, also can satisfy simultaneously at high temperature sample is carried out the long time loading test.
For addressing the above problem, the present invention is by the following technical solutions: transmission line of electricity aluminium and aluminium alloy power equipment testing device for testing high-temperature loading property, comprise control computing machine, high-temperature cabinet, electro-hydraulic servo tension tester, load retentive control system and sample unit clamp, it is characterized in that described high-temperature cabinet is controlled by temperature controller, and be arranged between the upper grip and lower chuck of tension tester; Described unit clamp comprises upper connecting rod and lower link, described upper connecting rod upper end is provided with the supporting base that is connected with the tension tester upper grip, the lower end of upper connecting rod penetrates described high-temperature cabinet, the end is provided with a sample web member, the lower end of described lower link is connected with the lower chuck of tension tester, the upper end penetrates described high-temperature cabinet, and the top is provided with a sample connector;
Described supporting base is fitted by the wedge surface of both sides and the wedge surface of testing machine upper grip; Described upper connecting rod is by inboard rounded channels adjustable cooperate of a spherical ball with described supporting base, offer center pit and the rounded channels of passing through for upper connecting rod on the supporting base, place described spherical ball in described rounded channels, the lower surface of spherical ball is the sphere with supporting base rounded channels equal curvatures, the rounded channels of spherical ball and supporting base is fitted, upper connecting rod is passed spherical ball and supporting base, screw in nut in upper connecting rod upper end, end face of nut and the applying of spherical ball upper surface.
Device of the present invention, under " mechanical load+constant high temperature+long-time " these three conditions, test, the actual motion environment of simulation power equipment, obtain the loss of strength rate (with normal temperature under intensity compare) of power equipment under high temperature carrying condition, for high temperature resistant power equipment provides relevant test figure and design considerations.
Apparatus of the present invention can be loaded into tested sample the arbitrary load between 12 ~ 600kN, be warmed to the arbitrary temperature between room temperature ~ 200 ℃, and stably keep load more than 400 hours, after the load maintenance stage finishes, can continue to load until sample destroys, obtain tested power equipment in uniform temperature, certain load and the breakdown strength after certain retention time.
As a further improvement on the present invention, detachable connection between described upper connecting rod and the sample web member.Detachable connection between described lower link and the sample connector.According to dissimilar samples, can change easily sample web member and sample connector.
Further improve as of the present invention, described upper connecting rod is by inboard rounded channels adjustable cooperate of a spherical ball with described supporting base again.Sphere fit structure between above-mentioned spherical ball and the supporting base can be adjusted to a pair of test force coaxial automatically, the impact that test findings is brought to reduce the test force disalignment.
Further improve as of the present invention, described load retentive control system links to each other with a hydraulic oil cooling system.Because testing machine is when work, its pressure Transfer Medium (hydraulic oil) needs under high pressure constantly to flow, and the impact of distribute heat when being subject to the work such as motor, gear-type pump, hydraulic oil is (long-time load hold mode) when long-time periodic duty, and its temperature can constantly raise.For this reason, the present invention has introduced hydraulic oil cooling system.Oil cylinder side one end of load retentive control system is opened two holes near position and the oil cylinder side other end tip position of bottom, and the former connects the oil-in of cooling system, and the latter connects the oil-out of cooling system.Hydraulic oil constantly carries out heat interchange by cooling system and reaches the cooling purpose, makes apparatus of the present invention guarantee the stable of oil temperature when working long hours, and has further improved the reliability of test macro.
Description of drawings
Fig. 1 is the integrally-built synoptic diagram of apparatus of the present invention.
Fig. 2 is apparatus of the present invention mutual relationship block diagrams between each system when work.
Fig. 3 is load keeping system architecture block diagram.
Fig. 4 is the scheme of installation of high-temperature cabinet 2.
Fig. 5 is the assembling synoptic diagram of testing machine, high-temperature cabinet and unit clamp.
Fig. 6 is the structural representation of unit clamp.
Fig. 7 is the structural representation of upper connecting rod assembly.
Fig. 8 is the assembling synoptic diagram of upper connecting rod assembly.
Fig. 9 is the structural representation of lower link.
Embodiment
With reference to Fig. 1, transmission line of electricity aluminium of the present invention and aluminium alloy power equipment testing device for testing high-temperature loading property, comprise control computing machine 4, high-temperature cabinet 2, electro-hydraulic servo tension tester 1, load retentive control system 7, hydraulic oil cooling system 8 and power equipment failing load test unit clamp 3, described high-temperature cabinet 2 is arranged between the upper grip 9 and lower chuck 10 of tension tester 1.
With reference to Fig. 2, in high-temperature cabinet, be provided with a fixing temperature sensor and 10 mobilizable temperature sensors.Described 10 mobilizable temperature sensors are used in the measurement space scope and the temperature value of sample different parts, whether have reached design temperature in order to the various piece of judging tested sample.The signal of described temperature sensor senses is exported to the control computing machine by Temperature sampler and is calculated and process.Described fixed temperature sensor is used for responding to the temperature inside the box, and signal is exported to temperature controller, controls the temperature inside the box of high-temperature cabinet in certain scope by temperature controller.Temperature controller adopts control able to programme, can subsection setup heating rate and temperature hold-time, can realize that the gradient of temperature raises and circulation.
Finishing the required load of test is provided by the electro-hydraulic servo tension tester.For the warranty test machine can be under long-time, top load condition steady operation, the present invention has introduced hydraulic oil cooling system 8.The oil circuit UNICOM of described hydraulic oil cooling system 8 and load retentive control system 7, and load retentive control system 7 and electro-hydraulic servo tension tester 1 oil circuit UNICOM, like this, hydraulic oil constantly carries out heat interchange by cooling system and reaches the cooling purpose.
With reference to Fig. 3, need sample is applied a permanent load in the high-temperature loading property test process of power equipment, and keep this load will be above 400 hours, above-mentioned condition is provided by the load keeping system.Load keeping system among the present invention is comprised of displacement transducer, pulling force sensor and computer control loading dynamic compensating system.Change of shape by the displacement sensor sample, load fluctuation by pulling force sensor perception sample, load dynamic compensating system in the computing machine is inputted in the two variation simultaneously, export compensating signal to electrohydraulic servo valve by computer control system, by the oil inlet quantity size of electrohydraulic servo valve controlled pressure oil cylinder, thus the real-time dynamic compensation of realization load and stable.
With reference to Fig. 4, high-temperature cabinet 2 is erected on the height-adjustable support, and can move forward and backward on support, makes casing can adapt to difform sample and anchor clamps.Described support comprises vertical guide rail 18 and horizontal cantilever 17, and described high-temperature cabinet 2 is arranged on the support plate 16 of described horizontal cantilever 17, also is provided with limited block 15 on the horizontal cantilever 17.Described vertical guide rail 18 fixes on the ground, and horizontal cantilever 17 can move up and down along vertical guide rail 18, is locked by fixture 19 after adjusting to the right place.Described high-temperature cabinet 2 tops and bottom offer the through hole 14 that passes through for unit clamp 3.
With reference to Fig. 5 and Fig. 6, described unit clamp 3 comprises upper connecting rod 12 and lower link 13.Described upper connecting rod 12 upper ends are provided with supporting base 11, are connected with the upper grip 9 of tension tester.The lower end of upper connecting rod 12 penetrates high-temperature cabinet 2, and the end is provided with a web member 22, is used for connecting sample 26.The lower end of described lower link 13 is connected with the lower chuck of tension tester 10, and the upper end penetrates high-temperature cabinet 2, and the top is provided with a connector 24, is used for fixedly sample 26.
With reference to Fig. 7, Fig. 8, upper connecting rod of the present invention 12 upper ends are provided with supporting base 11, described supporting base 11 is fitted by the wedge surface of both sides and the wedge surface of testing machine upper grip 9, offer center pit and the rounded channels 23 of passing through for upper connecting rod 12 on the supporting base 11, place a spherical ball 21 in described rounded channels 23, the lower surface of spherical ball 21 also is and the sphere of supporting base rounded channels 23 equal curvatures, the rounded channels 23 of spherical ball 21 and supporting base is fitted.With reference to Fig. 8, the assembling process of upper connecting rod assembly is as follows: upper connecting rod 12 is passed spherical ball 21 and supporting base 11, screw in nut 20 in upper connecting rod 12 upper ends, end face of nut 20 and the applying of spherical ball 21 upper surfaces.
During test, the requirement testing machine is carried in opposite, the equal and opposite in direction of a pair of direction of pull on the sample, when being subject to departing from power straight down in upper connecting rod 12 lower ends, upper connecting rod 12 will by the slip between spherical ball 21 and the supporting surface, make the direction of upper grip 9 imposed loads do small departing from and automatically adjustment along with lower chuck 10.As seen, the sphere fit structure between above-mentioned spherical ball 21 and the supporting base 11 can be adjusted to a pair of test force coaxial automatically, the impact that test findings is brought to reduce the test force disalignment.
Another more simple embodiment, described spherical ball 21 is fixed by welding or the direct and described upper connecting rod 12 that is threaded, and perhaps both integral formings also can realize automatically adjusting coaxial function.And, can save a hold-down nut, and assembling is also more simple.
With reference to Fig. 7, described upper connecting rod 12 lower ends are connected with web member 22 by screw thread.The shape of described web member 22 designs according to different sample structures.In the present embodiment, sample 26 is suspension clamp, and web member 22 is square frame shaped anchor clamps.
The framework surface profile of framework 22 and suspension clamp 26 contact portions is machined to the suspension clamp bottom interior surface fits tightly, make be applied to the suspension clamp inside surface be uniformly distributed load but not concentrated stress, match with the real work situation of suspension clamp 26.Simultaneously U-shaped link plate original and that suspension clamp is supporting is replaced to lower link, greatly simplified the assembling process when clamping.And when originally connecting lower link by U-shaped link plate, U-shaped link plate can only stand the single test, can't reuse, when adopting the integral type lower link, the lower link upper end is designed to have enough stressed carrying planes, but Reusability and indeformable is designed to the lower link lower end cylindrically simultaneously, it directly can be clamped on the lower chuck 10 of testing machine.
Operational instances:
Device of the present invention is used for a kind of of test Birmasil suspension clamp power equipment, is used for when steel tower hangs the high-temperature loading property of wire, at first other annexes of suspension clamp being pulled down, only body is tested.Assemble and be connected according to shown in Figure 6, upper connecting rod 12 and framework 22 are threaded connection, fitted in suspension clamp 26 inside surfaces and framework 22 bottoms, lower link 13 is passed through bolt 25 link to each other with two hangers 27 of suspension clamp.The first half of the Lower Half of upper connecting rod 12, framework 22, suspension clamp 26 and lower link 13 is all included in the high-temperature cabinet 2, and upper lower link is that the through hole of Φ 50mm is connected with the upper lower chuck 9,10 of testing machine 1 by diameter on the upper and lower surfaces of high-temperature cabinet.After clamping is complete, with the asbestos shutoff of the gap between lower through-hole on the high-temperature cabinet and the pull bar, and close the door of high-temperature cabinet.
Start respectively computing machine and controlling test program, No. 10 temperature sensors in high-temperature cabinet temperature control system and the high-temperature cabinet, testing machine power supply and servo switch.Being 200 ℃ in the required maintenance temperature of high-temperature cabinet control system panel setting test is 101 hours with the retention time.In the controlling test program, write the sample loading procedure, at first adopt the grip separation speed of 10mm/min as setting testing machine, when load reaches 5kN, load with the 2mm/min velocity of displacement, and when reaching 50kN, load stops to load, make load remain on 50kN always and also continue 100 hours, after 100 hours, continue to load until sample destroys, program will record sample automatically about the curve of " displacement-load " and " time meta-load ", obtain suspension clamp under 200 ℃ of high temperature, continue to bear 50kN load after 100 hours, the value of its breakdown strength.By to suspension clamp at normal temperatures with high temperature carrying after the breakdown strength contrast, obtain the loss of strength rate of suspension clamp behind high-temperature loading test, the safe operating life of prediction Birmasil suspension clamp after supporting with high temperature resistant wire.
With reference to Fig. 9, another embodiment of the invention.The sample web member 22 of described upper connecting rod 12 lower ends is inverted U-shaped, and the connector 24 of described lower link 13 upper ends is the U-shaped structure.This structure anchor clamps are used for test and connect gold utensil class power equipment, such as U-shaped link and yoke plate.Sample 26 among Fig. 9 is U-shaped link, and inverted U-shaped web member 22 is vertical with the opening direction of U-shaped connector 24.The inverted U-shaped web member 22 of upper connecting rod links to each other with the hangers of U-shaped link by bolt 28, and the U-shaped connector 24 of lower link links to each other with the ring body of U-shaped link by bolt 25.
Upper connecting rod 12 and sample web member 22 adopt detachable connection, can change comparatively easily anchor clamps.Screw off as testing the framework anchor clamps that suspension clamp uses, the U-shaped anchor clamps of loading onto for the test yoke plate get final product.
What should be understood that is: above-described embodiment is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.
Claims (9)
1. transmission line of electricity aluminium and aluminium alloy power equipment testing device for testing high-temperature loading property, comprise control computing machine (4), high-temperature cabinet (2), electro-hydraulic servo tension tester (1), load retentive control system (7) and sample unit clamp (3), it is characterized in that described high-temperature cabinet (2) is controlled by temperature controller, and be arranged between the upper grip (9) and lower chuck (10) of tension tester (1); Described unit clamp (3) comprises upper connecting rod (12) and lower link (13), described upper connecting rod (12) upper end is provided with the supporting base (11) that is connected with tension tester upper grip (9), the lower end of upper connecting rod (12) penetrates described high-temperature cabinet (2), the bottom is provided with first a sample web member (22), the lower end of described lower link (13) is connected with the lower chuck (10) of tension tester, the upper end penetrates described high-temperature cabinet (2), and the top is provided with a sample connector (24); Described supporting base (11) is fitted by the wedge surface of both sides and the wedge surface of testing machine upper grip (9); Described upper connecting rod (12) is by inboard rounded channels (23) adjustable cooperate of a spherical ball (21) with described supporting base (11), offer center pit and the rounded channels (23) of passing through for upper connecting rod (12) on the supporting base (11), place described spherical ball (21) in described rounded channels (23), the lower surface of spherical ball (21) is the sphere with supporting base rounded channels (23) equal curvatures, the rounded channels (23) of spherical ball (21) and supporting base is fitted, upper connecting rod (12) is passed spherical ball (21) and supporting base (11), screw in nut (20) in upper connecting rod (12) upper end, end face of nut (20) and the applying of spherical ball (21) upper surface.
2. transmission line of electricity aluminium as claimed in claim 1 and aluminium alloy power equipment testing device for testing high-temperature loading property is characterized in that detachable connection between described upper connecting rod (12) and the sample web member (22).
3. transmission line of electricity aluminium as claimed in claim 1 and aluminium alloy power equipment testing device for testing high-temperature loading property is characterized in that detachable connection between described lower link (13) and the sample connector (24).
4. transmission line of electricity aluminium as claimed in claim 1 and aluminium alloy power equipment testing device for testing high-temperature loading property is characterized in that described spherical ball is global body or hemisphere.
5. transmission line of electricity aluminium as claimed in claim 1 and aluminium alloy power equipment testing device for testing high-temperature loading property is characterized in that the sample web member (22) that is connected with described upper connecting rod (12) is square frame shaped structure.
6. transmission line of electricity aluminium as claimed in claim 1 and aluminium alloy power equipment testing device for testing high-temperature loading property, it is characterized in that the sample web member (22) that is connected with described upper connecting rod (12) is inverted U-shaped, the sample connector (24) that is connected with described lower link (13) is the U-shaped structure.
7. such as any one described transmission line of electricity aluminium of claim 1-6 and aluminium alloy power equipment testing device for testing high-temperature loading property, it is characterized in that also being provided with hydraulic oil cooling system (8), the oil circuit UNICOM of described hydraulic oil cooling system (8) and described load retentive control system (7).
8. transmission line of electricity aluminium as claimed in claim 7 and aluminium alloy power equipment testing device for testing high-temperature loading property, it is characterized in that being provided with in the described high-temperature cabinet (2) one group of mobilizable temperature sensor, described temperature sensor links to each other with the control computing machine by Temperature sampler.
9. transmission line of electricity aluminium as claimed in claim 8 and aluminium alloy power equipment testing device for testing high-temperature loading property is characterized in that described high-temperature cabinet (2) is erected on the height-adjustable support, and can move forward and backward on support.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010582453 CN102062713B (en) | 2010-12-10 | 2010-12-10 | Device for testing high-temperature load-carrying properties of aluminum and aluminum alloy electric power apparatuses of power transmission line |
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| CN 201010582453 CN102062713B (en) | 2010-12-10 | 2010-12-10 | Device for testing high-temperature load-carrying properties of aluminum and aluminum alloy electric power apparatuses of power transmission line |
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| CN102062713A CN102062713A (en) | 2011-05-18 |
| CN102062713B true CN102062713B (en) | 2013-04-24 |
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| CN102944767B (en) * | 2012-09-25 | 2015-01-28 | 浙江华电器材检测研究所 | Electrical equipment energy consumption testing device |
| CN103207116B (en) * | 2013-04-23 | 2015-06-03 | 中复碳芯电缆科技有限公司 | Long-time property detection device for carbon fiber composite material cable core |
| CN103439184A (en) * | 2013-08-21 | 2013-12-11 | 国家电网公司 | Clamping device used for electric power fitting abrasion testing machine |
| CN103913373B (en) * | 2014-04-14 | 2016-08-17 | 吉林大学 | Can be used for the tension-torsion composite fixture under multiple physical field coupling condition |
| CN103983510A (en) * | 2014-05-30 | 2014-08-13 | 浙江省泵阀产品质量检验中心 | Clamp special for combined tension test of gate valve closing member |
| CN104515707A (en) * | 2015-01-12 | 2015-04-15 | 西北工业大学 | Temperature measurement method for electrified tensile test piece and tensile test device |
| CN106568587B (en) * | 2016-11-02 | 2021-01-01 | 上海航天设备制造总厂 | Different-direction synchronous load test device and using method thereof |
| CN110220779A (en) * | 2019-05-15 | 2019-09-10 | 广州广能信达检测科技有限公司 | A kind of mechanical load test method of power metal suspension clamp |
| CN114235563B (en) * | 2022-02-24 | 2022-04-26 | 江苏恒康电力科技有限公司 | Device and method for testing strength of suspended power wire clamp |
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| CN202041425U (en) * | 2010-12-10 | 2011-11-16 | 浙江华电器材检测研究所 | Testing device for testing high-temperature loading property of aluminum and aluminum alloy electric power equipment of power transmission line |
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| CN2318740Y (en) * | 1997-11-10 | 1999-05-12 | 高正贤 | Aluminum alloy pendulous cable clamp for high-low voltage transmission and distribution line |
| CN2634468Y (en) * | 2003-07-31 | 2004-08-18 | 重庆工学院 | High temperature combination strength detector for material and coating layer |
| CN2879172Y (en) * | 2006-03-24 | 2007-03-14 | 深圳市新三思材料检测有限公司 | High temperature material mechanics performance testing machine |
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Inventor after: Yu Hongyun Inventor after: Zhang Zhenquan Inventor after: Zhang Long Inventor after: Lu Jun Inventor after: Li Wei Inventor after: Li Wensheng Inventor after: He Cheng Inventor after: Zhao Jianping Inventor after: Zhuang Wenbing Inventor after: Fu Hao Inventor after: Ai Hong Inventor after: Li Guoyong Inventor after: You Yi Inventor after: Wang Liang Inventor after: Li Rui Inventor after: Yu Minbo Inventor after: Zhang Longqin Inventor after: Zhang Wei Inventor after: Ma Qinyong Inventor after: Sun Yiqian Inventor before: Yu Hongyun Inventor before: Li Guoyong Inventor before: Wang Liang Inventor before: Li Rui Inventor before: Yu Minbo |
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Effective date of registration: 20151016 Address after: 310015 Taizhou Road, Zhejiang, China, No. 217, No. Patentee after: Zhejiang Huadian Equipment Inspection Institute Patentee after: Electric Power Research Institute, State Grid Xinjiang Electric Power Company Address before: 310015 Taizhou Road, Zhejiang, China, No. 217, No. Patentee before: Zhejiang Huadian Equipment Inspection Institute |
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Address after: 310015 Taizhou Road, Zhejiang, China, No. 217, No. Co-patentee after: Electric Power Research Institute, State Grid Xinjiang Electric Power Company Patentee after: Zhejiang Huadian inspection and Research Institute Co., Ltd. Address before: 310015 Taizhou Road, Zhejiang, China, No. 217, No. Co-patentee before: Electric Power Research Institute, State Grid Xinjiang Electric Power Company Patentee before: Zhejiang Huadian Equipment Inspection Institute |
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