FIELD: annular sealing for insert type coupling joint placed practically into rectangular cross section annular corrugation at coupling side of one tube.
SUBSTANCE: annular sealing has at front end sealing collar directed to axis of tube and bent to its back end and it has at back end sealing clamp directed to axis of tube. Sealing clamp may be deflected when narrowed end of second tube is inserted into coupling at bending sealing collar for abutting to narrowed end of second tube. When sealing is not loaded radial height of back lateral side of sealing collar consists 2/3 of total radial height 24 of annular sealing. Sealing collar has practically rectangular cross section. Directed to tube axis flat pressure surfaces of sealing collar and sealing clamp form acute angles with their respective back lateral surfaces. Relation of radial height of sealing collar to radial height of sealing clamp at unloaded state is in range (1.2 - 1.5):1.
EFFECT: enhanced reliability of sealing of coupling joint.
7 cl, 5 dwg
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