Excavator parts E330C main relief valve 103-8177 proportional solenoid valve

      The utility model aims to provide an excavator relief valve, which reduces the length of the pilot valve sleeve in the relief valve, improves the processing accuracy of the pilot valve sleeve, and improves the stability of the relief valve by improving the structure. In order to achieve the above purposes, the utility model adopts a technical scheme of an excavator relief valve, including a lifting head, a main valve core, a main valve sleeve, a pilot valve core, a pressure regulating spring and a pilot valve sleeve, the main valve core is arranged inside the main valve sleeve, the main valve core is provided with a lifting head and a pilot valve sleeve, the pilot valve sleeve is provided with a pilot valve core. The pilot valve sleeve is a two-stage split structure, composed of a valve body and a valve cover, the valve body away from the valve cover end is arranged in the main valve core, the valve body near the valve cover end through the limit structure and the main valve sleeve internal connection.

In the above technical scheme, the relief valve is the prior art, and the pilot relief valve is mainly composed of the lifting head, the main valve core, the main valve sleeve, the pilot valve core, the pressure regulating spring and the pilot valve sleeve. The lifting head and the main valve sleeve have holes on the pilot valve sleeve, and the pressure oil enters the main valve core cavity from the damping hole of the lifting head and acts on the pilot valve core. In this structure, the pilot valve sleeve is a two-stage split structure, including a valve body and a valve cover, the pilot valve core is arranged in the valve body cavity, because the pilot valve sleeve is divided into two parts of the valve body and the valve cover, thus greatly shortening the length of the pilot valve sleeve, reducing the length of the pilot valve sleeve cavity, making the pilot valve sleeve cavity and the pilot valve core contact part of the processing more convenient. The processing accuracy is improved, and one end of the valve body is arranged inside the main valve spool, and the other end is connected with the main valve sleeve through the limiting structure to improve the coordination accuracy between the main valve spool and the main valve sleeve.