Device is changed to bore hole pump piston rubber ring

The utility model relates to a device is changed to bore hole pump piston rubber ring. Its technical scheme is: mainly form by base, piston tray, side stand, limiting beam, slip frid, piston locatingpiece, Y -type top sword, the spacing axle of piston, the spacing clamp plate of piston and very heavy spacing collar. The piston tray is provided with the piston locating piece, can slide from top tobottom by the restriction of both sides limit stand, the limiting beam lower part is provided with the spacing clamp plate of piston, and upper portion is equipped with the spacing axle of piston, Y-type top sword, Y -type top sword designs the shape into Y, passes through the pivot with limiting beam and links mutually for withstand old piston rubber ring, so that the dismantling efficiency ofrubber ring, the spacing axle of piston for carry on spacingly to the piston, during the use, put into 10T hydraulic jack, suppress the dismantled and assembled piston rubber ring jump ring in back, carry out the change of rubbe