清管器发球筒橇装化设计及橇座应力分析

Design of Skid-mounted Pig Launch and Analysis of Stress in Sled Base

针对长输油气管道中发球筒设计及应力极限分布问题,采用仿真分析的方法对橇座的轴向力,弯矩,剪力,应力及位移进行分析。结果表明,最大的应力,轴向力,弯矩以及位移均出现在两吊耳之间,吊耳处为最大剪力出现的位置,且随着距离吊耳的增加,位移量迅速增大。计算表明,发球筒橇吊装过程中最大应力为67.81 MPa,最大位移为20.5 mm,满足设计的强度和刚度要求,证明该橇座设计方案以及吊耳布置的合理性。最后,给出橇装设计过程中吊耳位置选择的建议,该方案的设计为发球筒橇装化的设计提供参考。

With respect to the issues of design of ball cylinder and limit stress distribution in long oil transportation pipeline,the axial force,moment,shear force,stress and displacement in skid seat were analyzed by using simulation.It was shown from the results that all of the maximum stress,axial force,moment and displacement occurred between two lifting lugs;maximum shear force occurred at where lifting lug located,and with increase of the distance from lifting lug,the displacement increase sharply.It was shown from the results of the calculation that the maximum stress and the maximum displacement in the ball cylinder in sled lifting process was 67.81 MPa and 20.5 mm respectively,both of which were qualified for strength and stiffness requirements,and the design scheme for skid base and the arrangement of lifting lugs were proved be appropriate.Finally,the proposal for the selection of positions of lifting lugs in skid-mounted design was presented,which may be referenced for the similar design.