管接头用于管道与管道或管道与液压元件之间的连接，对管接头的主要要求是安装、拆卸方便、抗振动、密封性能好。Pipe joints are used for connecting pipelines or between pipelines and hydraulic components. The main requirements for pipe joints are convenient installation and disassembly, anti-vibration and g
Pipe joints are used for connecting pipelines or between pipelines and hydraulic components. The main requirements for pipe joints are convenient installation and disassembly, anti-vibration and good sealing performance.
At present, the types of pipe joint used for hard pipe connection mainly include welding type, flaring type and bayonet type.
Today we will focus on talking about welding type pipe joint, welding type pipe joint is mainly composed of joint body, nut and pipe, etc., joint body of screw in end for fine tooth pipe thread, its joint surface should add combination gasket, if screw in end for cone thread, then need not install combination gasket. O-ring seal is used to seal the connection between the joint body and the pipe. The pipe is pressed tightly on the end face of the joint body by the nut, and its outer end is welded to the steel pipe.
The welded pipe joint has the advantages of simple structure, convenient manufacture, high pressure resistance (32MPa) and good sealing performance. The disadvantage is that the quality of steel pipe and pipe welding requirements.
The material of joint body and nut of welded pipe joint is generally 35 or 45 steel, and welded pipe is 15 or 20 steel. In order to ensure the quality of welding, the steel tube connected with it should be 15 or 20 cold drawn (cold rolled) seamless steel tube of common grade accuracy. If the working medium is corrosive medium, the material should be stainless steel. In order to meet the different requirements of the hydraulic system pipe connection, the welded pipe joint can be divided into the end straight pipe joint, straight pipe joint, three-way pipe joint, four-way pipe joint, next-door straight pipe joint and sub-pipe pipe joint and other types, the selection can refer to the relevant standards (jb966-1002-77) or product samples.