The invention discloses a built-in
chimney rainproof cap structure. The built-in
chimney rainproof cap structure comprises a
chimney body, a shell section, a
waste gas filtering treatment mechanism, a protection shell, a
smoke outlet acceleration mechanism, an adapter and a down lead. A mounting base is arranged at the bottom of the chimney body, and supporting mechanisms are arranged on the two sides of the mounting base; the shell section is fixedly connected with the chimney body through a connecting
flange; the
waste gas filtering treatment mechanism is arranged in the chimney body, and a rainproof mechanism is arranged above the
waste gas filtering treatment mechanism; the protection shell is arranged at the top end of the chimney body; the
smoke outlet acceleration mechanism is arranged in the protection shell; the adapter is arranged at the top end of a rainproof cover, and a
lightning rod is arranged above the adapter; and one end of the down lead is fixedly connected with the
lightning rod through the adapter. According to the built-in chimney rainproof cap structure, the waste gas filtering treatment mechanism and the
smoke outlet acceleration mechanism are arranged, waste gas is effectively filtered and treated through the waste gas filtering treatment mechanism, environmental
pollution is avoided, and the discharging efficiency is improved through the smoke outlet acceleration mechanism.