Automatic stock solution treatment device for standard mixed gas preparation

The invention discloses an automatic stock solution treatment device for standard mixed gas preparation, which is provided with a sealed tank body, a horizontal partition plate and a ventilation cavity channel, a pressure valve is arranged in the ventilation cavity channel, the pressure valve blocks the inside of the ventilation cavity channel, air flow passes through the ventilation cavity channel to generate air pressure at the pressure valve, and the air pressure is controlled by the horizontal partition plate. The pressure valve moves under the action of air pressure to enable the two ends of the ventilation cavity channel to be communicated, a damping piece is arranged at the end of the pressure valve, the damping piece makes contact with the pressure valve to form a damping face, and the damping piece can move so as to adjust resistance formed by the damping face to resist movement of the pressure valve. According to the invention, a proper pressure threshold value is self-adjusted based on the solution