Device for shutting off a pipe

A device for shutting off a pipe, the pipe allowing fluidic circulation of at least one fluid, the shut-off device comprising:

• an in-line shut-off means for shutting off the pipe in a sealed manner and, conversely, for opening the pipe, the in-line shut-off means comprising a plate and tightening means allowing the plate to be tightened and, conversely, released, in order to allow the plate to be moved relative to the pipe, the plate being able to be moved depending on the positioning of a tightening control member;
• an upstream valve arranged upstream of the in-line shut-off means, the upstream valve being able to be actuated between an open position allowing the fluidic circulation and a closed position preventing the fluidic circulation, the upstream valve being actuated manually by an operator by means of an upstream control member;
• and
• a downstream valve arranged downstream of the in-line shut-off means, the downstream valve being able to be actuated between an open position allowing the fluidic circulation and a closed position preventing the fluidic circulation, the downstream valve being actuated manually by an operator by means of a downstream control member,
• wherein the shut-off device comprises an interlocking system for interlocking the tightening control member with the upstream control member and the downstream control member, the interlocking system being movable in translation in a direction OX between a first end position and a second end position, the interlocking system comprising different portions such that:
• in the first end position, a first portion allows the manual actuation of the upstream control member, a second portion allows the manual actuation of the downstream control member and a third portion prevents the manual actuation of the tightening control member;
• and
• in the second end position, a fourth portion prevents the manual actuation of the upstream control member, a fifth portion prevents the manual actuation of the downstream control member and a sixth portion allows the manual actuation of the tightening control member,
• the interlocking system comprising at least three separate parts assembled together, the at least three parts comprising a first part comprising the first portion and the fourth portion, a second part comprising the third portion and the sixth portion and a third part comprising the second portion and the fifth portion.