锥管螺纹用于气压和液压系统中的管道连接,具有密封可靠,不需附加填料,且可重复使用而不影响其密封性等优点。锥管螺纹的密封原理如图1所示。(a)是拧紧前的状态,齿谷、齿侧、齿顶均有间隙。(b)是用手拧紧至基面重合的状态,这时齿侧间隙消除,但齿顶齿谷部分仍有间隙。由于锥管螺纹是锥形,当用搬手再强制拧入时,便 Conical pipe thread for pneumatic and hydraulic piping connections, with a sealed, without the need for additional packing, and can be reused without affecting its sealing and so on. Taper pipe thread sealing principle shown in Figure 1. (a) is the state before the tightening, tooth valley, tooth side, tooth top have gaps. (b) is hand-tightened to the base coincide state, then the side clearance to eliminate, but there is still some gear tooth valley. Because the taper pipe thread is tapered, when forced to use screwdriver again, then