Gas driving device capable of switching outgoing gas, and drain valve

Abstract

The invention discloses a gas driving device capable of switching outgoing gas, and a drain valve. The driving device comprises a body, a first driving element, a second driving element and a piston component, wherein a piston cavity is formed in the body; the first driving element and the second driving element are movably connected with the body; the piston component is movably arranged in the piston cavity; a normally open first gas flow channel and a normally closed second gas flow channel which are communicated with the piston cavity are arranged in the body; the second driving element is linked with a switching element; when the first driving element drives the piston component, gas in the piston cavity flows out of the first gas flow channel; when the second driving element drives the piston component, the switching element is driven to close the first gas flow channel and open the second gas flow channel, and the gas in the piston cavity flows out of the second gas flow channel. The gas driving device shares the piston cavity, so that space occupation is reduced; the outgoing gas is switched by controlling the normally open gas flow channel and the normally closed gas flow channel by the switching element, so that the gas driving device is simple and compact in structure, ingenious in design concept, and low in cost.

Description

technical field [0001] The invention relates to a gas drive device and a drain valve capable of switching the gas outlet. Background technique [0002] Most of the existing gas actuated buttons for controlling the dual-stage drain valve use two separate buttons, and each button is provided with an independent piston chamber, and the button is pressed to drive the piston to compress the gas in the piston chamber, so that the gas flows from the respective Piston chamber outlet vents for actuation of the drain valve for full or partial drain. [0003] The structure of the existing gas actuated button needs to be provided with two separate buttons and two separate piston mechanisms, and the two buttons drive the respective piston mechanisms to control the drain valve for full or half drain. It is not applicable when the installation space of the reserved button is small, and it cannot meet the needs of some people for double-pressing the button, and the cost is also relatively ...

AI Technical Summary

Problems solved by technology

[0003] The structure of the existing gas actuated button needs to be provided with two separate buttons and two separate piston mechanisms, and the two buttons drive the respective piston mechanisms to control the drain valve for full or half drain. It is not applicable when the installation space of the reserved button is small, and it cannot meet the needs of some people for double-pressing the button, and the cost is also relatively high

Images