Acid-resistant manhole structure for concentrated sulfuric acid tank truck

The invention provides an acid-resistant manhole structure for a concentrated sulfuric acid tank truck, and solves the problems that a manhole cover and a manhole seat of a manhole of an existing concentrated sulfuric acid tank truck are easy to corrode, and a sealing gasket is easy to corrode and fall off, so that the manhole loses a sealing function, is difficult to operate and the like, the manhole structure mainly comprises the manhole cover and the cylindrical manhole seat; the manhole cover is characterized in that an annular sealing groove used for installing a sealing gasket is formed in the manhole cover; the annular sealing groove is of a structure with a small opening and a large inner cavity. A sealing face, used for being in butt joint with the manhole cover, at the upper end of the cylindrical manhole seat is an arc face. 本发明提供了一种浓硫酸罐车用耐酸人孔结构，解决了现有浓硫酸罐车的人孔存在人孔盖、人孔座易被腐蚀，密封垫易被腐蚀而脱落，从而造成人孔丧失密封功能，操作困难等问题，该人孔结构主要包括人孔盖以及筒状人孔座；其改进之处是：人孔盖上开设有用于安装密封垫圈的环形密封凹槽；环形密封凹槽为开口小且内腔室大的结构；筒状人孔座上端，用于与人孔盖对接的密封面呈圆弧面。