Quartz sand filter for industrial circulating water system

The utility model provides a quartz sand filter for an industrial circulating water system, which comprises a tank body, a blow-off pipe is arranged on the surface of the tank body, supporting legs are arranged at the lower end of the tank body, drainage pipes are arranged on the inner sides of the supporting legs at the lower end of the tank body, and an upper sealing plate is arranged at the upper end of the tank body. A water inlet mechanism is arranged at the center of the upper end of the upper sealing plate and comprises a water inlet pipe, a cover plate is movably connected to the interior of the water inlet pipe, a supporting block is arranged at the upper end of the cover plate, a first fixing pipe is arranged on the inclined surface of the supporting block, and a connecting rod mechanism is detachably connected to the interior of the first fixing pipe; the connecting rod mechanism comprises a connecting rod, and the two ends of the connecting rod are connected with a vertical rod and a pull rod. Acc