Sealing device for water inrush grouting hole sealing during subway construction

The utility model discloses a sealing device for water inrush grouting hole sealing during subway construction, which relates to the technical field of subway engineering and comprises a device main body, a support rod is movably mounted on the side surface of the device main body, an arc plate is fixedly mounted at one end of the support rod, an electromagnet is fixedly mounted on the upper surface of the device main body, and the electromagnet is fixedly mounted on the lower surface of the device main body. The device has the advantages that the arranged sliding block slides in the sliding groove under the elastic force of the second connecting spring and the tensile force of the first connecting spring at the same time, the sliding block drives the arc-shaped plate block to expand outwards through the supporting rod, and the arc-shaped plate block can slide in the sliding groove through the elastic force of the second connecting spring and the tensile force of the first connecting spring. And the power sup