Device for shielding operation hole of disconnecting switch of solid insulation ring main unit

Abstract

The invention discloses a device for shielding an operation hole of a disconnecting switch of a solid insulation ring main unit, and the device comprises a baffle plate, a limiting pin, a rotating shaft, a pressure plate, and a tension spring or torsional spring. The rotating shaft is rotatingly disposed on front and rear cross beams of the solid insulation ring main unit. The baffle plate is fixedly connected to one end, close to the operation hole of the disconnecting switch, of the rotating shaft, and is located behind an operation panel of the solid insulation ring main unit. The pressure plate is fixedly connected to one end, close to a front door of the solid insulation ring main unit, of the rotating shaft, and is inclined outwards and upwards. The torsional spring is disposed on the rotating shaft. One end of the tension spring is connected with the rotating shaft through a connecting lever, and the other end of the tension spring is fixed on the body of the solid insulation ring main unit through a support. The front cross beam or the rear cross beam is also provided with the limiting pin which is used for limiting the rotating angle of the rotating shaft. The device is disposed in the solid insulation ring main unit. When the front door is opened, the device can automatically shield the operation hole of the disconnecting switch on the operation panel, thereby preventing the misoperation of the disconnecting switch from causing a casualty accident.

Description

technical field [0001] The invention relates to a shielding device for an operating hole of an isolating switch of a solid insulating ring network cabinet. Background technique [0002] The solid insulated ring network cabinet is a high-voltage switchgear. In order to ensure that when the maintenance personnel enter any compartment inside the equipment for maintenance, each compartment is not charged. The existing switchgear is designed with such an interlock, that is, before the maintenance of the equipment, The circuit breaker must be opened and powered off first, and then the three-position isolating switch must be opened and closed to the grounding position before the front and rear doors can be opened for maintenance. And when sending power, you must first close the front door and the back door, then separate the grounding switch and close the isolating switch, and finally close the circuit breaker for power transmission. In addition, there is also an interlocking requ...

AI Technical Summary

Problems solved by technology

[0003] The current problem is: after the current door is opened, figure 2 , image 3 The operating hole 6 of the isolating switch on the operation panel 5 shown is not blocked. At this time, the circuit breaker is in the open state, and the isolating switch can be operated. In case someone inserts the operating handle by mistake and operates the isolating switch to close, there will be may cause an accident

Because once the isolating switch is closed, the interlock between the circuit breaker and the isolating switch will be released. At this time, the circuit breaker may be closed by operation. Once the circuit breaker is closed, the entire equipment will be in the energized state. At this time, the front and rear doors It is not closed, the maintenance personnel are probably still working in the cabinet, their life safety is seriously threatened, and it is likely to cause casualties and tragedies

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