Flue gas flow rate and flow velocity monitoring device

The utility model discloses a flue gas flow rate and flow velocity monitoring device which comprises a device main body, a gas outlet pipe is inserted into one end of the device main body, a three-way pipe is inserted into the other end of the device main body, an upper partition plate is arranged at one end in the device main body, and a lower partition plate is arranged at the other end in the device main body. A lower partition plate is arranged at the other end of the interior of the device body, sealing grooves are inserted into the two ends of the upper partition plate and the two ends of the lower partition plate correspondingly, and the sealing grooves are fixedly connected with the inner wall of the device body; and a sealing groove is fixedly connected to one side of the middle of the interior of the three-way pipe, a sealing ring is inserted into the middle of the three-way pipe, and a threaded rod is rotationally matched with one end of the sealing ring. By means of the structure, the threaded rod