Device for preventing smoke leakage

A device for preventing smoke leakage relates to the technical field of ceramic production and comprises a smoke baffle door arranged on a front section smoke pipeline, a non-metal expansion joint connected to the inlet end of a rear section smoke pipeline, a side flange connected to the outlet end of the front section smoke pipeline and a partition plate located at the position of the side flange and driven by a hanging bracket to move up and down. And the inlet end of the non-metal expansion joint is connected with a flange with a sealing gasket. Compared with the prior art, the anti-backflow device has the advantages that the anti-backflow device is mounted on a flue gas pipeline of an unproduced kiln, the influence of backflow of untreated flue gas on the kiln is prevented, and the fan is convenient to maintain. 一种阻止烟气泄漏的装置，涉及一种陶瓷生产技术领域，包括设置在前段烟气管路上的烟气挡板门、连接在后段烟气管路进口端的非金属膨胀节、连接在前段烟气管路出口端的侧法兰、位于侧法兰处且由吊架带动上下移动的隔板，非金属膨胀节的进口端连接有带有密封垫的法兰。本发明与已有技术相比，具有安装在未生产窑炉的烟气管路上，防止未处理烟气倒流对窑炉的影响，便于风机维修的优点。