Unloading device with external indication

The utility model discloses an unloading device with an external indication function. The unloading device comprises a valve body, a valve element and an indication rod. The valve element is elastically installed in the valve body in a sliding mode and seals an unloading loop in the valve body. The indicating rod is connected to the valve element and contracts into the valve body. When the valve element conducts the unloading loop for unloading under the medium pressure, the indicating rod is suitable for moving along with the valve element till part of the indicating rod extends out of the valve body. The unloading device has the beneficial effects that the unloading device is internally installed through the front end of the valve body, the rear end of the valve body is externally arranged, and therefore during unloading, the indication rod connected with the valve element slides along the valve body till part of the indication rod extends out of the valve body so that the unloading state can be observed. C