Protective airtight through-wall pipe casing pipe

A protective airtight through-wall pipe casing pipe comprises a through-wall pipe for a civil air-defense wall body and a water supply and discharge system. A steel casing pipe is sleeved outside the through-wall pipe, a wing ring is welded outside the steel casing pipe, and a fixed flange is welded at the right end of the steel casing pipe. The steel casing pipe is poured in the civil air-defense wall through the wing ring and the fixed flange. The fixed flange is welded with a baffle which is sleeved on the through-wall pipe. A check ring is welded on the through-wall pipe. Batched jute is filled in the check ring between the through-wall pipe and the steel casing pipe, and asbestos cement is filled on two sides of the batched jute. The steel casing pipe of the protective airtight through-wall pipe casing pipe is poured on the civil air-defense wall body through the wing ring and the fixed flange, and the wing ring and the fixed flange are welded on the steel pipe, the through-wall pipe penetrates through t