The invention discloses a city domestic
sewage low-energy-consumption treatment device. The city domestic
sewage low-energy-consumption treatment device comprises a
machine body and a sewer sealing
machine body installed on the end face of the right end of the
machine body. The circumferential outer surface of the sewer sealing machine body is internally provided with a fan-shaped groove which isoutwards opened and centrosymmetric. The inner wall of the right end of the fan-shaped groove is internally provided with an annular groove. The inner wall of the bottom of the annular groove is internally provided with a first cavity. A fan-shaped sealing block is slidably and cooperatively connected into the annular groove. The fan-shaped sealing block is internally provided with a fan-shaped sliding chute of which an opening is backwards steered along a
principal plane. A permanent
magnet compensation sealing fan-shaped block is slidably and cooperatively connected into the fan-shaped sliding chute. The inner wall of one end of the fan-shaped sliding chute is internally provided with an electromagnetic block which is in power connection with the permanent
magnet compensation sealing fan-shaped block. An internal gear cylinder is rotatably and cooperatively connected into the annular groove.