Hydraulic quick-change device control loop for excavator

The utility model discloses a control loop of a hydraulic quick-change device for an excavator, which comprises a quick-change oil cylinder, a hydraulic control loop and a control loop, wherein the quick-change oil cylinder comprises a rod cavity and a rodless cavity; the first reversing valve is used for switching oil feeding of the rod cavity and the rodless cavity, and the first reversing valve is connected with the rod cavity through a rod cavity oil way and connected with the rodless cavity through a rodless cavity oil way; the load-sensitive pump is used for providing a hydraulic source for the action of a movable arm of the excavator; the first hydraulic source is provided with hydraulic oil with stable pressure; two oil inlets of the shuttle valve are connected with an oil outlet of the load-sensitive pump and a first hydraulic source respectively, and an oil outlet of the shuttle valve is connected with an oil inlet of the first reversing valve through a first oil inlet path. By introducing the first