Liquid filling device

The invention relates to a liquid filling device, which comprises a liquid storage tank, a liquid filling device and a control device, the filling assembly communicates with the liquid storage tank, part of the filling assembly is used for being inserted into the lantern ring, and the filling assembly can conduct filling operation so as to inject liquid into the inner space of the lantern ring; the driving part is connected with the filling assembly; and the control assembly is connected with the driving part, and the control assembly can control the driving part to work in a preset working mode so as to drive the filling assembly to intermittently inject liquid into the inner space of the lantern ring. 本发明涉及一种液体加注装置，其中，液体加注装置包括：储液箱，用于存储液体；加注组件，与储液箱相连通，部分加注组件用于插入套环内，加注组件能够进行加注作业以向套环的内部空间中注入液体；驱动部，与加注组件相连接；控制组件，与驱动部相连接，控制组件能够控制驱动部以预设工作模式工作，以驱动加注组件间断性的向套环的内部空间中注入液体。