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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of pneumatic devices, in particular to a direct-acting pressure relief pneumatic device, an air-controlled drain valve and a water tank. Background technique [0002] Most of the traditional toilets use a mechanical drain valve to drain the water tank. When draining is required, the drain valve is usually driven to open by manual pressing, so as to realize draining. With the improvement of people's requirements for quality of life, non-contact drain valves are gradually applied to smart toilets. Due to the lack of mechanical actuation for manual pressing, the non-contact drain valve requires an additional pneumatic device to trigger the activation of the drain valve. [0003] At present, the commonly used pneumatic device in the market is composed of an air pump, an air bag and a pressure relief valve. When drainage is required, the air pump is started to inflate the air bag. Some pneumatic devices do not ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used pneumatic device in the market is composed of an air pump, an air bag and a pressure relief valve. When drainage is required, the air pump is started to inflate the air bag. Some pneumatic devices do not have a pressure relief function. After the air pump triggers the drain valve to open through the air bag to drain water, the entire air circuit is filled with pressurized gas. Stand against the opening switch of the drain valve so that the drain cannot be stopped

In order to achieve the pressure relief function of the pneumatic device, the existing pneumatic device usually needs to be equipped with a special pressure relief module, add a solenoid valve, and exhaust the air bag through the gas circuit conversion to achieve pressure relief, but this solution requires an additional solenoid valve and Components such as pipelines and circuits are expensive, and the structure is complex, taking up a lot of space, internal wiring is messy, and assembly and maintenance are very troublesome

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