Polished rod sealing device

The utility model discloses a polished rod sealing device, the utility model discloses a loop, top connection, lower clutch, worm wheel and worm, top connection and lower clutch be the staving, top connection and lower clutch pass through threaded connection, the loop be located top connection and lower clutch, the lower extreme of loop and down connector thread be connected, fixed the cup jointing on the loop of worm wheel, the worm is connected with the worm wheel along radially passing the top connection, the upside of loop is fixed to be provided with the inside groove screen pipe, is provided with the through -hole on the lateral wall of inside groove screen pipe, is provided with the one -level packing in the inside groove screen pipe, the top of top connection is provided with presses the cover, the pressure is overlapped and is connected with last connector thread, still is provided with the second grade packing in the lower clutch, the second grade packing is located the lower part of loop. The loop