DETACHABLE THREADED JOINT Russian patent published in 1998 - IPC

FIELD: heat and nuclear power stations; connection of construction units. SUBSTANCE: nut of threaded joint is reliably locked against vibration and displacement caused by temperature variations. Locking of nut in service is provided by its coupling with intermediate part which can displace only along bolt. Threaded joint can be assembled and disassembled as required, i. e. it is repairable. Nut is turned onto upper part of bolt with hole and is coupled with intermediate part by projections getting inside cavities on nut. Intermediate part is constantly pressed by lock spring. Intermediate part and bolt in cross section are hexagonal, thanks to it intermediate part can move translationally only along bolt. To turn the nut on or off, intermediate part should be forced off from nut by pressing onto shoulder and compressing the spring. Part of construction of heat or nuclear power station to be connected is acted upon by force equal to spring loading force. EFFECT: enhanced reliability of connection. 8 cl, 20 dwg