The utility model relates to a sealing structure with trapezoidal thread joint point, which comprises a pipe body (1) and coupling (2), which is characterized in that the outer tube (1) arranged on the outer surface of the end part from outer to inner thread (3), spherical seal structure (4) and the end the shoulder (5), the collar (2) of the end part of the inner surface from the outside to the inside in turn is provided with internal threads (6), cone seal structure (7) and right shoulder (8), the tube body (1) and coupling (2) closely with the external thread (3), spherical seal structure (4) are respectively connected with the inner thread (6), cone seal structure (7) forming a radial interference fit, the end face of the shoulder (5) and right shoulder (8) axial interference fit. The utility model relates to a trapezoidal thread joint with a cutting point sealing structure, which has the advantages of high connection efficiency and good gas sealing performance.
【技术实现步骤摘要】
【技术保护点】
一种具有切点密封结构的梯形螺纹接头，它包括管体（1）和接箍（2），其特征在于所述管体（1）的端部外表面从外至内依次设置外螺纹（3）、球面密封结构（4）以及端面台肩（5），所述接箍（2）的端部内表面从外至内依次设置内螺纹（6）、锥面密封结构（7）以及直角台肩（8），所述管体（1）与接箍（2）紧密配合，所述外螺纹（3）、球面密封结构（4）分别与内螺纹（6）、锥面密封结构（7）形成径向过盈配合，所述端面台肩（5）与直角台肩（8）形成轴向过盈配合。
【技术特征摘要】
【专利技术属性】
技术研发人员：冯朝晖，毛世泽，杜仕泽，
申请(专利权)人：成都望晖石油管有限责任公司，
类型：实用新型
国别省市：
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