Cooling water flow and flow difference detection alarm device for copper melting furnace

A copper melting furnace cooling water flow and flow difference detection alarm device comprises a flow difference instrument, a water inlet flow meter and a water outlet flow meter, the instrument analog quantity output of the water inlet flow meter and the instrument analog quantity output of the water outlet flow meter are electrically connected with the two analog quantity input ends of the flow difference instrument respectively, an audible and visual alarm is arranged at the upper end of a box body, and an installation groove is formed in the upper end of the front side of the box body. A flow difference instrument is arranged in the mounting groove, a flow difference alarm indicating lamp is arranged below the flow difference instrument, a noise elimination knob is arranged below the flow difference alarm indicating lamp, the signal output end of the flow difference instrument is electrically connected with the audible and visual alarm and the flow difference alarm indicating lamp respectively, and the