| 摘要 |
A connection of pipes used for pumping of endogenous liquids and for guides of drills with the trapezoid thread (3), created between the internal element (1) and external element (2), is characterised based on the special combination of surfaces assuring hermetic metal sealing with the use of the interaction between the external sealing surface (4) of the internal element (1) and the internal sealing surface (9) of the external element (2), which have a conic shape with a taper ratio of 6,25 up to 9,25 percent. The external sealing surface (4) of the internal element (1) fitting to the appropriate sealing surface (9) of the external element (2), is 0,5 up to 2,5 mm long. It is suitable, the sealing to be combined with two fitting surfaces (5,10) on the internal element (1) and external element (2) having a conic shape, while the angle creating lines with a plane perpendicular to the connection axle is 5 up to 10 degrees, while the above mentioned fitting surfaces (5,10) touch each other after interaction and inching of threads (3) closed to the fitting surfaces (4,9). |
