The invention relates to the field of construction of
nuclear power plants, in particular to a drilling positioning device for drilling medium and large equipment of a
nuclear power plant. In order to improve the success rate of drilling with an electric pistol
drill and lower the construction risk, the drilling positioning device is provided. A supporting structure comprises a supporting plate, a connecting plate and two clamping plates, wherein the clamping plates are connected with the supporting plate at the ends of the supporting plate to form a U-shaped structure, and the connecting ends of the clamping plates are connected with the connecting plate. A
drill bit positioning hole is formed in a positioning template. A
drill bit reserved hole is formed in a drilling positioning plate. When the drilling positioning device is used, the positioning template is fixed to the connecting plate, the drilling positioning plate is parallel to the positioning template and fixed to the positioning template, the central axis of the
drill bit reserved hole and the central axis of the
drill bit positioning hole are overlapped, and the
drill bit positioning hole and the drilling position of a surface to be drilled are aligned. According to the drilling positioning device, the drilling position and the drilling direction of a drill bit are limited through the drill bit reserved hole and the drill bit positioning hole, the drilling quality is improved, and the drilling construction risk is lowered.