Outdoor high-voltage isolating switch
Technical field:
The present invention relates to the high-voltage alternating current isolating switch technical field, it is a kind of drive system of outdoor AC high-voltage isolating switch in definite saying.
Background technology:
The outdoor high-voltage isolating switch that electric power system at present adopts, its drive system is the version of twentieth century, drive system is all exposed in the space.Because air quality descends, erosion is embroidered in the joint of drive system easily, exposes in the drive system in space and in a single day embroiders erosion, will have a strong impact on the carrying out of switch operation.The push-and-pull kind of drive of alternate transmission connecting leg, affected by environment bigger, area especially northeastward because summer in the winter temperature difference is big, summer its temperature can reach 40 degree, its surface temperature can reach-40 degree in the winter time.In the 220kV electrical voltage system, the phase spacing of isolating switch is 4 meters.It is more than 10 millimeters that the temperature difference of 80 degree can cause 4 meters long connecting leg length variations, has therefore destroyed the synchronism of isolating switch, makes water conservancy diversion loop cisco unity malfunction.More than 2 bring hidden danger all can for the safe operation of electric power system.In addition, run into bad weather, floating ice easily knot can't carry out grid switching operation on connecting rod and driving joint, brings hidden danger to system safety operation.
Summary of the invention:
The purpose of this invention is to provide the safe and reliable drive system of a kind of outdoor high-voltage isolating switch.It will expose in the joint of the drive system in space is installed in semiclosed or totally enclosed crossbeam.Make it not to be subjected to the direct erosion of rain, snow and the direct projection of sunlight, improve the driving joint reliability of action flexibly.In order to reach this purpose, the push-and-pull kind of drive of alternate transmission connecting leg changes the rotation kind of drive of transmission tube into.Avoided the not problem of the same period or dynamic and static contact loose contact of the three-phase that caused by temperature difference problem.Can resist the erosion of extreme natural environments such as rain, snow.1, outdoor high-voltage isolating switch, described isolating switch is a three-phase, it comprises housiung separator, switching mechanism, operator, insulation column, junction block, contact tube, moving contact and fixed contact, it is characterized in that: driving mechanism 1 is connected on the vertical drive link 2, and vertical drive link 2 is connected on the operator transmission crank arm 3 that is installed in the housiung separator 11; Operator transmission crank arm 3 connects one-level kinematic link 4, and one-level kinematic link 4 is connected on first transmission crank arm; First transmission crank arm connects transmission main shaft 6, and transmission main shaft 6 is connected with three pairs second transmission crank arm respectively, and every pair of described second transmission crank arm is respectively one by one corresponding to each phase in the described three-phase; Described each all have mutually two secondary drive links 8, one of them described secondary drive link 8 with described each in mutually, be connected with corresponding one second transmission crank arm of a described described secondary drive link 8; Another described secondary drive link 8 with described each in mutually, be connected with corresponding another second transmission crank arm of described another described secondary drive link 8; The secondary drive link 8 of every phase is connected on the folding transmission crank arm 9 under the rotating shaft 10 in the bearing pedestal; Alternate transmission is for rotating transmission.All the joint of drive system is installed in the semiclosed or totally enclosed housiung separator 11.The operator of middle and upper part of the present invention is divide-shut brake under folding transmission crank arm 9 drives, and its mode is identical with existing high voltage isolator with structure.Ground knife switch mechanism is also identical with existing high voltage isolator ground knife switch structure, the drive system design ground knife switch mechanism that also can adopt the present invention to operate.
Advantage of the present invention is: because the joint of drive system is installed in the semiclosed or totally enclosed crossbeam, the cradle head of drive system all can not be subjected to the direct erosion of rain, snow and the direct projection of sunlight, improve the rust-proofing ability of driving joint, prolonged the time between overhauls(TBO).Make and operate more flexibility and reliability.The particularly alternate kind of drive becomes rotating manner, and the total kilometres of transmission link are not acted upon by temperature changes, and has guaranteed that the total kilometres of isolating switch transmission are stablized constant.Increased substantially the reliability of isolating switch.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is for being the upward view of Fig. 1 (dismounting supporting leg)
Embodiment
The present invention is a twin columns single break form, driving mechanism is connected on the vertical drive link, vertical drive link is connected on the operator transmission crank arm that is installed in the housiung separator, the operator transmission crank arm connects the one-level kinematic link, the one-level kinematic link is connected on the transmission crank arm, transmission crank arm connects final drive shaft, and final drive shaft connects six connecting levers respectively, transmission crank arm connect two secondary drive links of every phase, every phase the secondary drive link, be connected in the bearing pedestal on the transmission crank arm under the rotating shaft.The joint of drive system is installed in the semiclosed or totally enclosed crossbeam.
Driving mechanism can be electronic, also can be manual.Electronic produces 180 degree rotary powers by motor drive mechanism 1, drives vertical drive link 2 and rotates, and drive link 2 drives the operator transmission crank arm 3 Rotate 180 degree that are installed in the square tube crossbeam makes it produce needed driving force distance.Operator transmission crank arm 3 promotes one-level kinematic link 4, the one-level kinematic link promotes transmission crank arm 5, transmission crank arm 5 drives transmission main shaft 6 and rotates, transmission main shaft 6 drives are installed on coaxial six transmission crank arm 7 of three-phase that go up and move simultaneously, and transmission crank arm 7 push-and-pulls two utmost point kinematic links 8, secondary kinematic link 8, the transmission crank arm 9 that drives under the interior rotating shaft 10 of bearing pedestal make its rotation finish the divide-shut brake action of threephase switch.The hand mode of manual employing.
Switch column, square tube crossbeam outer surface anti-corrosion are all adopted surperficial galvanizing.Surperficial zincizing is adopted on the remaining parts surface.Rotary part is installed bearing or self-lubricating cover, and it is reliable to guarantee that rotating shaft is rotated mutually.