Sulfur hexafluoride gas density relay

Abstract

The invention discloses a sulfur hexafluoride gas density relay. According to the sulfur hexafluoride gas density relay, the shock resistance performance is higher, the contact point contact and electrical performance of a signal generator is better, the service life is long, and the precision is high. The sulfur hexafluoride gas density relay comprises a shell, a base, an end base, a Bourdon tube, a temperature compensating component, a machine core, a signal conditioning mechanism and a plurality of microswitchs, wherein the end base, the Bourdon tube, the temperature compensating component, the machine core, the signal conditioning mechanism and the microswitchs are arranged in the shell. The sulfur hexafluoride gas density relay is characterized by further comprising a misoperation preventing mechanism corresponding to contact operating arms of the microswitchs. The misoperation preventing mechanism comprises a fixing base, a rotary shaft, a rotary piece and a deflector rod, wherein the deflector rod abuts against the contact operating arm of each microswitch. When the gas density relay is impacted or vibrated, the deflector rod of the malfunction preventing mechanism swings through the rotary piece and deflects the contact operating arm of each microswitch to the pressure increasing direction, so that the signal generator is far away from the position where a misoperation occurs, the signal conditioning mechanism is prevented from mistakenly triggering the signal generator when the gas density is normal, and the shock resistance performance of the density relay is greatly improved.

Description

technical field [0001] The invention relates to 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, positioning plate 19, fixing Plate 20 , wire ...

AI Technical Summary

Problems solved by technology

When the Baden tube 6 moves, the sector gear shaft 24 with the movement 2 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 movable contact of the switch. When it is rotated to the end face of the adjusting screw When it is perpendicular to the operating arm of the micro switch, the adjustment screw is stuck and cannot be rotated, so it is difficult to realize the full-scale density relay of -0.1 ~ 0.9MPa, especially difficult to realize the display with the initial value of -0.1MPa , it cannot be displayed when vacuuming, and it is difficult to popularize and apply, so innovation is very much needed

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