现行的液压管接头端密封，如图1所示的焊接式端直通管接头（JB966－77），端密封采用二平面夹持组合垫圈1来实现。其缺点是：图11．垫圈2．接头体3．O形圈4螺母5管接1．接头体2（JB984－77）旋入与之结合体的细牙螺纹，由于加工原因在尾部留有退刀槽。于是使内径基本上等于螺纹 The current hydraulic pipe joint end seal, as shown in Figure 1 welded straight through the pipe joints (JB966-77), the end seal with two flat clamping combination washer 1 to achieve. The disadvantage is: Figure 11. Washer 2. Connector body 3. O-ring 4 nut 5 pipe connection 1. Connector body 2 (JB984-77) screwed into the combination of fine thread, because of processing reasons left in the tail groove. The inner diameter is then substantially equal to the thread