Flexible joint for railway vehicle

The invention relates to a connector, in particular to a flexible connector for a railway vehicle. The invention aims to solve the technical problem that an existing pipe joint is difficult to completely meet the installation and use requirements of the railway vehicle, and provides a flexible joint for the railway vehicle. Threaded sealing, hoop sealing and sealing groove sealing are combined, the sealing effect is good, high-frequency vibration can be adapted, and the problem of welding cracks caused by vehicle vibration in the prior art is solved, so that the sealing device can be used for railway passenger car and freight car transportation, and is particularly suitable for railway freight car transportation. The elastic sleeve is sleeved in the connector body, the connector body is in threaded connection with the ring sleeve in a matched mode, so that the hoop and the elastic sleeve are pressed tightly, the connector body and the brake pipe are welded, the structure is simple, connection is reliable, and