The utility model discloses a kind of pneumatic devices for preparing bubble, it includes liquid supply module, the liquid supply module includes bubble solution tank, pneumatic
diaphragm pump and
workstation bottom tank;The bubble solution tank is used to store bubble solution, the pneumatic
diaphragm pump is used to pump into
workstation bottom tank with bubble solution, the
workstation bottom tank is used to accommodate bubble solution and gas;
Gas supply module, the
gas supply module includes workstation cover tank and gas connection
pipe;The workstation cover tank is used to accommodate gas, the gas connection
pipe is used to transmit gas into pneumatic device;Output module, the output module includes transmission
pipe and bubble generator;The transmission pipe is used to transmit bubble solution and gas into bubble generator, the bubble generator is used to generate bubble.The utility model's pneumatic device uses compressed gas as only power, without implementing explosion-proof measure, while only needing to adjust valve can control the operation of device, especially suitable for being applied to
coal mine underground and needing explosion-proof operating place.