Apparatus for cutting lateral wall of pipe

An apparatus for cutting a lateral wall of a first pipe to form a hole in the lateral wall thereof, the first pipe having an opening at which the first pipe intersects and communicates with a second pipe, the apparatus comprising:

• a fixed member which is fixedly disposed in the second pipe, the fixed member being harmonized with the diameter of the second pipe;
• a rotating member linked to the fixed member so as to be able to rotate inside the first pipe along a periphery of the opening thereof about an axial center of the second pipe;
• and
• a nozzle having a spray port that is mounted to the rotating member such that the spray port faces an internal surface of the lateral wall of the first pipe;
• wherein the rotating member is rotated relative to the fixed member, and a pressurized fluid material or a pressurized granular material is sprayed from the spray port of the nozzle to cut the lateral wall along the periphery of the opening in the first pipe, and
• wherein a spacer ring is inserted between the fixed member and the second pipe when an outside diameter of the fixed member is less than an inside diameter of the second pipe.

An apparatus for cutting a lateral wall of a first pipe to form a hole in the lateral wall thereof, the first pipe having an opening at which the first pipe intersects and communicates with a second pipe, the apparatus comprising:

• a fixed member which is fixedly disposed in the second pipe, the fixed member being harmonized with the diameter of the second pipe;
• a rotating member linked to the fixed member so as to be able to rotate inside the first pipe along a periphery of the opening thereof about an axial center of the second pipe;
• and
• a nozzle having a spray port that is mounted to the rotating member such that the spray port faces an internal surface of the lateral wall of the first pipe;
• wherein the rotating member is rotated relative to the fixed member, and a pressurized fluid material or a pressurized granular material is sprayed from the spray port of the nozzle to cut the lateral wall along the periphery of the opening in the first pipe, and
• wherein the rotational speed of the nozzle is determined at least in accordance with the spraying pressure of the fluid material or granular material and the thickness of the lateral wall being cut.