End cover machining method, end cover and pipeline assembly

• Main Authors: WANG WENJIE, DUAN YUJIAN, GUAN MINGMING
• Format: Patent
• Language: Chinese; English
• Published: 08.08.2023
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COMBINED OPERATIONS; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEAT PUMP SYSTEMS; HEATING; ICE-BOXES; JOINTS OR FITTINGS FOR PIPES; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MACHINE TOOLS; MANUFACTURE OR STORAGE OF ICE; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; OTHER WORKING OF METAL; PERFORMING OPERATIONS; PIPES; REFRIGERATION OR COOLING; REFRIGERATORS; SOLDERING OR UNSOLDERING; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; UNIVERSAL MACHINE TOOLS; WEAPONS; WELDING; WORKING BY LASER BEAM

The invention provides an end cover machining method, an end cover and a pipeline assembly, the end cover comprises an annular piece, the inner wall of the annular piece is used for being connected with the outer wall of a first pipeline, the outer wall of the annular piece is used for being connected with the inner wall of a second pipeline, and the end cover machining method comprises the step that the annular piece is made of a powder metallurgy material. By adopting the scheme, the annular piece is made of the powder metallurgy material, so that the porous characteristic of powder can be fully utilized, the surface roughness is increased, meanwhile, wetting of welding flux is facilitated, the molten welding flux can smoothly permeate into the welding contact surfaces of the first pipeline and the second pipeline, and the welding quality is improved. Therefore, the welding effect of the inner wall of the annular piece and the first pipeline and the welding effect of the outer wall of the annular piece and