笔者就中、高压管道连接中密封问题设计了三种装置,现介绍如下:1.单层管连接在管与管的连接中,采用可拆锥度密封接头(见图1),锥度2α=30°,锥度配合长度 l=(0.5～1)D。经管内通以风压为6MPa 的实际试验,符合设计要求,解决了风管接口漏气问题。2.双层管连接双层钻杆的连接,原采用圆柱矩形螺纹连接,外壁漏气严重。笔者在原连接的基础上,在圆柱矩形螺纹的前端加一锥度承肩(见图2),承肩锥度2α=22°l=(10～15)mm,借助矩形螺纹的旋紧而使锥度承肩 The author of the medium and high pressure pipe connections in the sealing design of the three devices are as follows: 1. Single-layer pipe connection Pipe and pipe connections, the use of removable taper sealed joints (see Figure 1), taper 2α = 30 °, taper with the length of l = (0.5 ~ 1) D. Through the management of the wind pressure to 6MPa actual test, in line with design requirements, to solve the problem of air duct leakage. 2. Double pipe connection Double drill pipe connection, the original cylindrical rectangular thread connection, the outer wall of a serious gas leak. On the basis of the original connection, the author adds a taper shoulder on the front end of the cylindrical rectangular thread (see Fig. 2), the shoulder taper is 2α = 22 ° l = (10-15) mm, the taper bearing shoulder