Aircraft pylon comprising a tubular primary structure including at least one twin-walled pipe, and aircraft comprising at least one such pylon

1. An aircraft pylon comprising:

a primary structure comprising structural tubes and a pipe segment having an internal duct, each structural tube comprising a tubular wall that separates an interior zone from an exterior zone,

wherein the internal duct of the pipe segment is positioned in the interior zone of at least one of the structural tubes of the primary structure,

wherein the primary structure comprises at least one first or second passage hole passing through at least one of the tubular walls of the structural tubes of the primary structure, the first or second passage hole being configured to allow the internal duct to pass therethrough,

wherein the pylon comprises at least one of an upstream or downstream pipe segment comprising an external duct which forms, with the internal duct, a twin-walled pipe, the external duct comprising an end oriented towards one of the structural tubes of the primary structure,

wherein the pylon comprises a leaktight connection connecting the end of the external duct and one of the structural tubes of the primary structure,

wherein the leaktight connection comprises:

an end wall fitted to the end of the external duct and held clamped against the tubular wall of the structural tube all around the first or second passage hole, said end wall having a passage orifice through which the internal duct passes,

a tubular extension that prolongs the passage orifice and is push-fitted into the first or second passage hole,

at least one first seal, surrounding the first or second passage hole, interposed between the end wall and the tubular wall of the structural tube,

at least one second seal interposed between the internal duct and the tubular extension.

2. The aircraft pylon according to claim 1 , wherein the pylon comprises at least two internal duct segments, a connector connecting the two internal duct segments, first and second structural tube segments and a connection system connecting the first and second structural tube segments, the connector and the connection system being positioned approximately in a shared plane, and in that the connection system comprises two ends of the first and second structural tube segments push-fitted one inside the other, a holding system for holding the two ends push-fitted one inside the other and at least one seal interposed between the two ends push-fitted one inside the other.

3. The aircraft pylon according to claim 2 ,

wherein the primary structure comprises a transverse frame comprising an orifice in which are positioned the connector and the connection system, and

wherein the holding system comprises

a first collar secured to the first structural tube segment and held clamped against a first face of the transverse frame,

a second collar secured to the second structural tube segment and held clamped against a second face of the transverse frame, and

sealing elements interposed between each of the first and second collars and the transverse frame.

4. The aircraft pylon according to claim 1 , wherein the primary structure comprises at least one partition which is positioned inside one of the structural tubes and is connected in a leaktight manner to the tubular wall so as to delimit, in the interior zone, a leaktight cavity in which the internal duct is positioned.

5. The aircraft pylon according to claim 1 , wherein the primary structure comprises at least one spacer configured to keep separate the internal duct and the tubular wall of the structural tube.

6. An aircraft comprising at least one pylon according to claim 1 .