Safety features for switch handle for piggable pipeline connector

摘要

A switch arm assembly for a piggable pipeline connector, the assembly comprising a switch arm and a handle assembly. The handle assembly comprises shaft connecting a handle with the switch arm and a stop to prevent the shaft from moving substantially away from the switch arm should the shaft become disconnected from the switch arm. The stop may comprise a shoulder in the shaft to prevent the shaft from exiting a housing, a bonnet over the top of the handle, or both.

主权项

1. A switch arm assembly comprising:
a switch arm; a handle assembly, the handle assembly comprising:
a shaft with a first end and an opposed second end, where the first end is connected to the switch arm; anda stop preventing the shaft from moving substantially away from the switch arm should the shaft become disconnected from the switch arm; and a housing with a top, where the first end of the shaft is located inside the housing, the shaft extends through an opening in the top of the housing, and the second end of the shaft is located outside the housing;where the stop comprises a bonnet comprising:
a first leg attached to the top of the housing and extending away from the housing parallel to the shaft; a second leg attached to the top of the housing and extending away from the housing parallel to the shaft and to the second leg, and; a cross piece connecting the first leg and the second leg beyond the second end of the shaft such that the bonnet straddles the second end of the shaft.