Vulcanization pipeline outlet locking device for cable

The utility model relates to the technical field of vulcanization pipelines for cables, and discloses a vulcanization pipeline outlet locking device for cables, which comprises a vulcanization pipe, a connecting disc is fixed on the surface of the vulcanization pipe, the vulcanization pipeline outlet locking device for cables is provided with an adjusting assembly, a cable penetrates into the vulcanization pipe, and a handle is rotated to enable a threaded rod to rotate, so that the vulcanization pipe is locked. A threaded rod moves close to the circle center of a connecting disc to drive an arc-shaped sliding plate to move inwards, through formed sliding grooves, the arc-shaped sliding plate can synchronously move in the radial direction, so that a fixing rod can be driven to synchronously move, at the moment, the fixing rod can drive a stabilizing plate to move inwards, and the surface of the stabilizing plate can abut against the inner wall of an annular cavity of a rubber ring; the rubber ring contracts i