Pipelayer lazy arm limiting early warning device and lazy arm limiting system

The utility model discloses a pipelayer lazy arm limiting early warning device and a lazy arm limiting system. The pipelayer lazy arm limiting early warning device comprises an early warning travel switch, an early warning indicator lamp and a lazy arm limiting early warning relay. The early warning travel switch is arranged at the position, corresponding to a triangular support, on the lower side of a lazy arm beam, the early warning travel switch triggers the lazy arm limiting early warning relay to act, and then an early warning indicator lamp circuit is connected or disconnected. On the premise of an existing lazy arm limiting device, a limiting early warning device body is added, the normally-closed early warning travel switch is additionally arranged on the lower side of the lazy arm beam, in the lazy arm moving process, when a travel switch rocker arm makes contact with the triangular support, the switch is turned on, the early warning signal is sent, the lazy arm limiting warning travel switch is triggered to act, the early warning indicator lamp glitters, a driver adjusts the operating speed according to the early warning prompt, and the safe limiting operation of a lazy arm is achieved through the limiting device of the lazy arm. The lazy arm bending phenomenon caused by mechanical damage of a lazy arm limiting mechanism is avoided, and the safety and durability of pipelayer working are improved.