Local angle of tower crane and spacing system of stroke

The utility model discloses a local angle of tower crane and spacing system of stroke installs travel switch no. 1 and travel switch no. 2 respectively on the jib loading boom of tower crane, installation travel switch no. 3 and travel switch no. 4 in jib loading boom turned angle region, wherein jib loading boom central point put apart from travel switch for the normal operating distance betweenone, travel switch no. 1 and travel switch are the normal operating distance in the limited region between two, travel switch no. 3 and travel switch are limited district angle between four, each travel switch corresponds with the interior spacing relay that corresponds of dolly through controller wireless transceiver module respectively and is connected. The utility model discloses a series of expenses such as setting up required material of protection and manual work have been saved in the protection that can save key building in the partial tower crane coverage, effectively reduce construction cost, can solve simul