FIELD: transport.
SUBSTANCE: invention relates to fast-release coupling for, at least, one pipe, comprising case with, at least, one tube end to be fitted in pipe end face, cap arranged around said tube end and secured at coupling case to form annular clearance between tube end and cap intended for retaining connected pipe end, and lock ring arranged in gap between tube end and cap. Lock ring comprises retainer to engage with pipe wall to prevent pipe extending from aforesaid gap by thrusting it against said cap. Coupling comprises also means to control pipe fitting in said clearance, opening in cap and visual indicator to vary outlook of coupling depending on either pipe is fitted in gap between tube end and cap, or not. Visual indicator comprises, at least, one contact part arranged between lock ring and tube end to engage with tube end when pipe is fitted in aforesaid gap.
EFFECT: higher reliability of joint.
23 cl, 23 dwg
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