The utility model relates to the related technical field of
coating liquid, in particular to an automatic
coating liquid
backflow collecting device which comprises a bottom frame, and an overflow filtering mechanism is arranged at the bottom of a
backflow box. According to the automatic
coating liquid
backflow collecting device, redundant coating liquid flows to the
liquid injection opening through the backflow pipeline and the like, the sealing
gasket ensures that the backflow box is sealed, and after entering the backflow box, the coating liquid firstly makes contact with the first-stage filter plate made of
ceramic fibers, intercepts large-particle impurities and is resistant to high temperature, and then passes through the second-stage filter plate made of stainless steel and the third-stage filter plate made of aluminum plates, and the coating liquid flows back to the
liquid injection opening. The power of a self-priming pump of an overflow
pipe is adjusted according to the flow, so that the coating liquid stably flows to a connecting port, a first filter layer of
activated carbon adsorbs organic volatile matters, a second filter layer of
ceramic micropores intercepts tiny impurities, a third filter layer of
ion exchange resin removes
metal ions, and the coating liquid flows into the connecting port; finally, the pure coating liquid flows into the container
bottle, and the device is movable and stable.