Ventilation hole for asphalt storage tank

The vent hole comprises a main pipeline, a flange plate connected to the bottom of the main pipeline, a bottom plate and a top cover which are arranged at the top of the main pipeline, the bottom plate and the top cover are connected through bolts, a dustproof net is arranged at an opening between the bottom plate and the main pipeline, and a ball valve is arranged on the bottom plate. The oil-gascondenser is reasonable in structure, the dust screen is arranged, the storage space of oil-gas condensation is increased, oil stains and dust are prevented from blocking air holes, and the dirt discharge structure is arranged, so that the oil stains and the dust are cleaned conveniently and regularly. 本实用新型公开了一种沥青储罐用通气孔，包括主管道，主管道底部连接法兰盘，主管道顶部设置有底板和顶盖，底板和顶盖通过螺栓连接，底板与主管道之间的开口处设有防尘网，底板上设有球阀。本实用新型结构合理，设置防尘网，增加了油气冷凝的存储空间，防止油污和灰尘阻塞气孔，并设置排污结构，方便定期对油污灰尘进行清理。