Plunger type fracturing pump

Abstract

The invention relates to the technical field of fracturing pumps, in particular to a plunger type fracturing pump which comprises a supporting assembly, a power assembly and a liquid feeding assembly, the supporting assembly comprises a power shell, a liquid storage shell and a liquid outlet shell, the liquid storage shell is fixed to one side of the power shell, the liquid outlet shell is fixed to one side of the liquid storage shell, and the power assembly is arranged in the power shell; the liquid feeding assembly comprises a piston rod, a liquid inlet ring, a sliding ring, a spring and a one-way valve, the piston rod is provided with a push head and a limiting part, one end of the piston rod is connected with power, the limiting part is fixed to the inner wall of the liquid storage shell, the other end of the piston rod is slidably arranged in the liquid storage shell, and the liquid inlet ring is provided with a plurality of through holes and is in threaded connection to the outer side of the piston rod; the sliding ring is slidably arranged on one side of the liquid inlet ring and close to the push head, and the one-way valve is fixed in the liquid outlet shell. Therefore, punching in the center can be avoided, and the strength and the service life of the piston rod are improved.

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