Installation method of monoblock pump core of ejector rod core of V-shaped machine

The invention discloses an installation method of a monoblock pump core of an ejector rod core of a V-shaped machine, and belongs to the field of installation of the monoblock pump core of the ejectorrod core. The problem that due to the fact that the monoblock pump core is prone to being excessively polished, after the ejector rod core is installed, the deviation of the size of a core assembly is generated is solved. The installation method comprises the steps that a locating plate is arranged on one side of the upper end of the polished monoblock pump core, specifically, the thickness of the locating plate is equal to the standard value of assembly of the monoblock pump core and the ejector rod core; then the monoblock pump core is placed on the ejector rod core, and the outer wall of the locating plate is utilized to abut against the inner wall of the ejector rod core; and finally self-hardening sand is inserted into the space between the bottom end of the monoblock pump core and the ejector rod core from