Fluid end structure of reciprocating pump

Abstract

The invention discloses a fluid end structure of a reciprocating pump. The fluid end structure of the reciprocating pump comprises a supporting main pump body, a valve cavity body fixedly connected with the supporting main pump body and a plunger piston. The plunger piston penetrates the supporting main pump body and stretches into a first cavity of valve set modules. The outer wall of the plungerpiston is sleeved with a main seal box assembly and an auxiliary seal box assembly. The main seal box assembly is arranged between the outer wall of the plunger piston and the supporting main pump body. The auxiliary seal box assembly is arranged between the outer wall of the plunger piston and the main seal box assembly. Lubricating grease is fed into the main seal box assembly and the auxiliaryseal box assembly of the fluid end structure, friction between the plunger piston and packing can be reduced, heat can be reduced, and the service life of the plunger piston and the service life of the packing can be prolonged. The valve set modules can be freely combined in different machine types to adapt to various media, high-pressure liquid conveying can be achieved, a valve core adopts nonmetal and metal combined type seal, nonmetal valve face contact is carried out before metal valve face contact is carried out, and the service life of a valve set is prolonged.

Description

technical field [0001] The invention relates to the technical field of reciprocating pumps, in particular to a fluid end structure of a reciprocating pump. Background technique [0002] A reciprocating pump is a positive displacement pump that relies on the reciprocating movement of a piston, plunger or diaphragm in a pump cylinder to alternately increase and decrease the working volume in the cylinder to deliver or pressurize liquid. [0003] The existing notification number is CN204941896U, a hydraulic end structure of a high-pressure reciprocating pump, including a pump head, a valve group, and a stuffing box. The valve group is arranged inside the pump head, and the pump head is connected to a bracket. It is fixed on the pump head through a bracket, and the stuffing box, bracket and pump are connected by hexagon socket head screws, and a first O-ring is provided at the joint between the pump head and the stuffing box, and the stuffing box includes a stuffing box , plung...

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Problems solved by technology

[0004] The liquid end structure of the above-mentioned high-pressure reciprocating pump is affected by the conveying medium, pressure, etc., resulting in a variety of liquid end structures, which cannot meet the various needs of users; , The service life of the valve group is very short, and it is often necessary to replace vulnerable parts, which is inconvenient to disassemble and assemble, and consumes a lot of manpower and material resources

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