Direct-acting pressure relief pneumatic device, pneumatic control drain valve and water tank: Fid-Bau Portal

Direct-acting pressure relief pneumatic device, pneumatic control drain valve and water tank

XIE WEI / CAI MINGJIAN / YU JIAOFENG / JIANG YISHAN

The invention discloses a direct-acting pressure relief pneumatic device, a pneumatic control drain valve and a water tank, the direct-acting pressure relief pneumatic device comprises a shell, an air inlet cover, an inflation telescopic piece, a driven piece and a self-pressure-relief mechanism, the inflation telescopic piece can expand and extend in the shell after being inflated, and the driven piece is arranged in the shell; the self-pressure-relief mechanism comprises an air leakage hole and a touch part, the air leakage hole is formed in the inflatable telescopic part and is in a normally-closed state, the touch part is fixed to the movable end of the inflatable telescopic part, and after the inflatable telescopic part expands and extends in place, the touch part is in a normally-closed state. And the triggering piece can open the deflation hole, so that the inflatable telescopic piece is deflated and contracted. The pneumatic control drain valve comprises the direct-acting pressure relief pneumatic device. The water tank comprises the pneumatic device for direct-acting pressure relief. By the adoption of the air inflation device, pressure relief can be automatically conducted after air inflation is in place, operation is reliable, the structure is very simple, and cost is low.

本发明公开了一种直动泄压的气动装置、一种气控排水阀及一种水箱，所述直动泄压的气动装置包括壳体、进气盖、充气伸缩件、从动件和自泄压机构，所述充气伸缩件在充气后能够在所述壳体内膨胀伸长，所述自泄压机构包括泄气孔和触动件，所述泄气孔设于所述充气伸缩件上并处于常闭状态，所述触动件固定于所述充气伸缩件的活动端，在所述充气伸缩件膨胀伸长到位后，所述触动件能够打开所述泄气孔使所述充气伸缩件进行泄气收缩。一种气控排水阀，包括如上所述的直动泄压的气动装置。一种水箱，包括如上所述的直动泄压的气动装置。采用本发明，能够在充气到位后自动进行泄压，运作可靠而且结构非常精简，成本较低。

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