Gas dredging pipe for chemical safety

The utility model provides a gas dredging pipe for chemical safety, which comprises an inlet punch, a first gas pipe, a second gas pipe, a gas bag, a three-way ball valve and a gas pump, the inlet punch is tubular, the outer side wall of the right end of the inlet punch is provided with the annular gas bag, the gas bag is fixedly connected to the inlet punch in a surrounding manner, and the gas bag is connected with the three-way ball valve. The right end of the entering punch is communicated with and fixed to the left end of the first air pipe, the left end of the second air pipe is communicated with the air bag, the left end of the second air pipe is fixed to the right end of the entering punch, the three-way ball valve is provided with an inlet, a first outlet and a second outlet, and the inlet, the first outlet and the second outlet are communicated with the air bag. The right end of the first air pipe is communicated with the first outlet, the right end of the second air pipe is communicated with the sec