Liquid level measuring device for liquid ammonia spherical tank

The liquid ammonia spherical tank liquid level measuring device comprises a protective cylinder and an end cover, the protective cylinder is arranged outside a meter head in a sleeving mode, and the protective cylinder is connected with a flange in a buckled mode; the end cover is screwed in the pile casing, and a positioning rod abutting against the flange is arranged on the end cover; the end cover is used for rotating relative to the pile casing so as to drive the positioning rod to be close to the flange, and the pile casing can be fastened to the flange. The enclosed space enclosed by the pile casing, the end cover and the flange is used for protecting the gauge outfit, so that the service life of the gauge outfit can be prevented from being shortened due to the influence of external environmental factors. 本申请提供一种液氨球罐液位测量装置，包括护筒以及端盖，护筒套设于表头的外部，且护筒与法兰扣接；端盖旋合于护筒的内部，且端盖上设有与法兰抵接的定位杆；其中，端盖用于相对于护筒转动，以带动定位杆靠近法兰，并能够使护筒扣紧于法兰上。其利用护筒、端盖以及法兰共同围合形成的封闭空间对表头的防护，能够避免表头的寿命因外界环境因素影响而缩短。