The invention discloses an online detection device of the clear
water layer thickness of a concentration tank, and aims at solving the problems of
lag control and poor precision of the existing device. The online detection device is characterized by comprising a detection rod, a
pressure sensor, a guide base, a supporting base, a lifting device, a displacement sensor, a
programmable logic controller (PLC) control box, an upper travel switch and a lower travel switch, wherein the supporting base and the guide base are arranged on the bridge frame of a
concentrator; the lifting device and the upper travel switch are arranged on the supporting base, and the lower travel switch is arranged on the guide base; the displacement sensor is fixed on the side face of the lifting device, and the lower side is connected with the detection rod; the
pressure sensor is arranged in the inner cavity of the detection rod, and a probe stretches out and contacts with the level; and a limiting plate is arranged on the detection rod, and the upper plane of the limiting plate is constantly contacted with the contact of the displacement sensor. According to the online detection device of the clear
water layer thickness of the concentration tank, by the combination of the
pressure sensor and the displacement senor, and by an automatic conversion
system and the guide device which move up and down, the thickness of the clear
water layer in the concentration tank can be automatically detected in real time, so that the
automatic control of the concentration process is achieved, and the labor intensity of the operator is reduced.