Oxyfuel Equipment富氧燃烧设备.ppt

* * * * * * * * * * * * * * * * * * Oxyfuel Welding Equipment Chapter 12 Objectives Identify the various components of an oxyfuel gas welding outfit. Describe the function of each component of an gas welding out fit. Cite the maximum safe working pressure used for acetylene. List all the safety equipment that should be worn and used when oxyfuel gas welding in various positions. Complete Oxyfuel Outfit Gas Supply Regulators Hoses Welding Torch Eye Protection Striker Oxygen Supply Stored in high pressure cylinders 2000-2640 PSI Obtained By Atmosphere Electrolysis Oxygen-bearing pellet Oxygen Cylinders Interstate Commerce Commission (ICC) Forged in one piece Must be at least ? inch thick High carbon steel Cylinder Valves Made of brass “Back-seating valve” Never use in the partly opened position Integrated pressure safety device Cylinder safety cap Acetylene Cylinders Acetylene is not safe above 15 PSI Cylinders are filled with monolithic filler 85% porosity Charged with acetone Absorbs acetylene Fuse plugs Pressure Regulators Reduce high cylinder pressure to working pressure Maintain a constant working pressure Pressure Gauges Usually two on each regulator One indicates bottle pressure One indicates hose pressure Hoses Hose colors Red, green, and black Green and Black Oxygen Red Acetylene Torch Types Positive pressure type Injector type Positive Pressure Type Mixing chamber is located inside the valve body Requires high pressure to mix gases Injector Type Acetylene is injected into the oxygen stream using venturi action Mixing chamber creates turbulence to further mix gases Welding Tips Solid copper Two different types of tips One piece Two piece Do not drop tips Do not try to remove hot tips Tip Cleaners Orifice size and shape must be maintained Splatter from base metal may contaminate tip Tip cleaners use a round file type cleaner Only correct size cleaners should be used Tips should be filed off perpendicular to orifice Welding Eye Prote