CLOSURE DEVICE FOR TIGHTLY CLOSING A FILLING AND EMPTYING SYSTEM OF RAILWAY TANK CARS OR TRANSPORTATION TANKS

摘要

The invention relates to a closure device (50) for tightly closing a pipe connection piece (102) of a filling and emptying system of railway tank cars or transportation tanks. The closure device (50) has a closure cap (30) with a sealing means (106) which engages on an end face (104) of the pipe connection piece (102). The invention also relates to a method for operating the closure device. Provision is made for at least one additional sealing element (20) which is fitted to the closure cap (30) to engage in a force-fitting manner with an inner wall (103) of the pipe connection piece (102). In order to close the pipe connection piece, the closure cap is inserted into the opening (101) in the pipe connection piece (102) and screwed to the pipe connection piece (102), and drawn into the clamping apparatus (40) by rotating a clamping apparatus (40) relative to the closure cap (30) with the aid of the threaded connection of the retaining pins (204) until a noticeable opposing force is generated, wherein this opposing force is generated by elastic deformation of the at least integral annular seal (202, 203). The sequence is reversed in order to open the closure.