Slow-closing type outdoor alternating-current high-voltage isolating switch with built-in fracture

Abstract

The invention discloses a slow-closing type outdoor alternating-current high-voltage isolating switch with a built-in fracture. The slow-closing type outdoor alternating-current high-voltage isolatingswitch comprises a main loop unit, a main frame piece, an operating unit, an operating handle and an interlocking transmission unit, wherein the main loop unit is connected with a main switch througha connecting bar and used for controlling opening and closing of the isolating switch, the main frame piece is connected with the main loop unit and is used for placing the main switch, the operatingunit is used for driving the main loop unit to act to execute opening and closing of the isolating switch, the operating handle is connected with the operating unit and is used for outputting openingand closing actions, the interlocking transmission unit is connected with the main loop unit through a synchronizing shaft and is used for realizing bidirectional locking of the isolating switch by the main switch, the interlocking transmission unit and the operating unit are coaxially arranged, the interlocking transmission unit is linked with the operating unit to realize opening and closing ofthe isolating switch when the main switch is at the opening position, and the interlocking transmission unit unlocks the main switch and can operate the main switch to realize opening and closing when the isolating switch is at the opening or closing position. According to the invention, the main loop unit, the interlocking transmission unit, the operating unit, the main frame piece and the connecting bar are all used as independent mechanisms for production and are not arranged in sequence, the main loop unit, the interlocking transmission unit, the operating unit, the main frame piece and the connecting bar can be assembled through set positions to form the whole isolating switch, and the production and assembly process is simplified.

Description

technical field [0001] The invention relates to an isolating switch, in particular to a slow-closing outdoor AC high-voltage isolating switch with a built-in fracture. Background technique [0002] The overhead transmission line of the distribution network is the main transmission mode of electric energy, accounting for more than half of the proportion in the field of electric energy transmission in the distribution network. The outdoor pole switch is an important part of the overhead transmission line of the distribution network, which is responsible for the control, protection, distribution and maintenance of electric energy. and many other functions; the exposed conductor in the overhead transmission line is the main factor causing instantaneous faults such as single-phase ground faults. At present, the newly constructed overhead line cables are all insulated cables, and the outer layer of the conductor is an insulating layer. They are all covered with silicone rubber pro...

AI Technical Summary

Problems solved by technology

At present, the isolating switches of overhead lines are all in the form of external knife switches and contact contacts. All point-to-point circuits such as the contact connections of the isolating switches are exposed to the air, especially in environments with high humidity and acidic atmospheres, which will aggravate the main The aging of the circuit, especially the contacts, leads to unstable closing, which in turn causes faults such as contact heating and burning; and the external contact structure directly exposed to the air is affected by environmental and climatic factors, resulting in oxidation and corrosion of the contacts As a result, the contact resistance increases, the temperature rise of the contact part of the contact is abnormal, and the contact is overheated and burned. The dust and oxides and other dirt between the contacts of the external isolating switch cause a sudden increase in the operating torque of the isolating switch, and even induce the switch The closing and opening of the equipment is unreliable, which affects the continuity of power supply

[0003] At present, the transmission part of the overhead isolating switch is driven by a manual auxiliary spring to realize the opening and closing operation of the isolating switch. The change of the contact condition of the knife switch has a great influence on the change of the operating force, and it is easy to appear that the closing is not in place. The interlocks of the isolating knife structure are all one-way locking, that is, the one-way locking of the main switch to the isolating switch. When the opening and closing of the isolating switch is not in place, the operation of the main switch will directly cause damage to the interlock, which will eventually lead to isolation. The switch cannot be operated or there are faults such as burnt contacts of the isolating switch

[0004] In addition, the connecting part of the moving end of the isolating switch configured by the pillar switch is borrowed from the first outlet terminal of the main switch. The long-term operation of the isolating switch and abnormal operating force will have a certain impact on the main switch, which will seriously cause the insulation failure of the main switch, etc. Faults occur; the assembly process of the existing isolating switch is complicated, and some of the functional units of the conventional supporting isolating switch are part of the main switch, which does not have the basis for assembly as a separate module

[0005] Although the existing equipment manufacturers and production plants have taken measures such as strengthening the structure of the existing pillar type isolating switch and adding protective covers, the occurrence of all the above-mentioned faults cannot be fundamentally avoided. Therefore, the above-mentioned problems need to be solved urgently

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