Magnetic filtering device for circulating water system of shield tunneling machine

The utility model provides a magnetic filtering device for a circulating water system of a shield tunneling machine, which comprises an inner circulating water tank (1), a first water channel (101) and a first water return channel (102) are arranged in the inner circulating water tank (1), and a first magnetic filter element (2) used for adsorbing and filtering metal chippings and impurities entering from the first water return channel (102) is arranged in the inner circulating water tank (1). The utility model further provides another magnetic filtering device for the circulating water system of the shield tunneling machine. The shield tunneling machine magnetic filtering device is simple in structure and few in used accessories, the magnetic filtering element is fixed through the modified ball valve or the modified metal filtering net, the magnetic filtering element can effectively adsorb and remove metal chippings and impurities in circulating water, the working efficiency of a circulating water system is