A method for preventing malfunction of sulfur hexafluoride gas density relay

Abstract

The invention discloses a method for preventing misoperation of a sulfur hexafluoride gas density relay. A mioperation preventing mechanism is additionally arranged and comprises a fixing seat, a rotary shaft, a rotary piece and a poking rod; firstly, the fixing seat is mounted in a shell, and then the rotary shaft is arranged on the fixing seat; the rotary center and the gravity center of the rotary piece are made to be non-concentric and the rotary piece is mounted on the rotary shaft in a mode that the gravity center is positioned obliquely below the rotary center, then the poking rod is vertically arranged on the upper end of the rotary piece and is abutted against the contact operation arm of each microswitch, so when the gas density relay is subjected to the impact and the vibration generated in the switching on and switching off of a sulfur hexafluoride switch, the poking rod pokes the contact operation arm of each microswitch to the gas density increasing direction by the swinging of the rotary piece, so the microswitch is away from the position subjected to the misoperation and the microswitch is prevented from being miss-triggered by a signal adjusting mechanism when the gas density is normal. The vibration-resistant performance of the sulfur hexafluoride gas density relay is higher due to the method.

Description

technical field [0001] The invention relates to a method for preventing misoperation of a sulfur hexafluoride gas density relay. Background technique [0002] At present, oil-free gas density relays with micro switches as contacts are generally used to monitor the gas density of sulfur hexafluoride in electrical equipment, such as Chinese patents or patent applications 200510110648.5, 200520045890.4, 200520045891.9, 200520115321.2, 200610023139.3, Gas density relays disclosed in 200610118940.6, 200810201462.4, 200910195174.7, 201020190271.5 and 201010171798.8 (such as figure 1 and figure 2 As shown) generally includes dial 1, pointer 2, Baden tube 3, temperature compensation element 4, base 5, movement with display amplification mechanism 6, connecting rod 7, housing 8, joint 9, micro switch 101, 102, 103, adjusting parts 111, 112, 113, contact operating arm 12, connecting arm 13, end seat 14, wiring seat 15, watch glass 16, cover case 17, printed circuit board 18, positi...

AI Technical Summary

Problems solved by technology

When the Baden tube moves, the sector gear shaft with the movement rotates, so that the adjusting screw rotates and touches the operating arm of the micro switch, and the operating arm is driven to press the moving contact of the switch. When the operating arm of the switch is vertical, the adjusting screw is stuck and cannot be rotated, so it is difficult to realize a density relay with a full range of -0.1 to 0.9 MPa, especially difficult to achieve a display with an initial value of -0.1 MPa. It cannot be displayed at the time, and it is difficult to promote and apply, so innovation is very much needed

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