Uninterrupted gas supply device

The invention discloses an uninterrupted gas supply device which comprises a first gas delivery manifold, a first pneumatic valve, a second gas delivery manifold and a second pneumatic valve. One endof the first gas delivery manifold is communicated with a main gas supply source while the other end of the same is communicated with a gas output pipeline or a gas output port, the first pneumatic valve is arranged on the first gas delivery manifold and is a normally-closed valve, one end of the second gas delivery manifold is communicated with a standby gas source while the other end of the sameis communicated with the gas output pipeline or the gas output port, and the second pneumatic valve is arranged on the second gas delivery manifold and is a normally-open valve. The main gas supply source and the standby gas source are serially connected to be switched mutually in a full-automatic manner within 0.5-1s, so that continuous gas use of gas using units is ensured. 本发明公开了不间断供气装置，其包括：第输气主管，其端与主供气源连通，另端与气体输出管路或气体