Plunger pump for coating machine

The utility model discloses a plunger pump for a coating machine. The plunger pump comprises a plunger body, a plunger valve head and a sealing ring. The upper portion of the plunger body is provided with a cylinder, the upper portion of the cylinder is provided with a threaded column, the cylinder, the threaded column and the plunger body are of an integrated structure, the inner side wall of the bottom end of the plunger body is provided with an internally embedded thread, the upper portion, above the internally embedded thread, of the plunger body is provided with a discharging opening, the discharging opening is communicated with an inner cavity of the plunger body, a protruding clamping ring is arranged on the outer side wall of the plunger body, under the discharging opening, the plunger valve head is of a T-shaped circular hole column structure, the plunger body is connected with the plunger valve head through a bolt structure, and the plunger body exactly clamps the sealing ring with the protruding clamping ring. The plunger pump has the advantages that the technology is simple, the weight is light, the sealing degree is high, the coating flow is large, the spraying pressure is high, the plunger pump not only can keep high coaxiality with a coating cylinder but also can be fixedly arranged on a cylinder pilot valve body, and the mounting and dismounting are convenient.