A reciprocating plunger pump

Abstract

The invention relates to a reciprocating type plunger pump. The reciprocating type plunger pump comprises a liquid feeding valve; the liquid feeding valve comprises a valve seat, and a valve element arranged in the valve seat. The reciprocating type plunger pump is characterized in that the liquid feeding valve is opened through a driving mechanism; the driving mechanism comprises a rotating shaft which is driven by an external force to rotate, a cam of which an inner hole sleeves the rotating shaft, and a propping rod of which the first end is propped to the valve element and while the second end is equipped with a moving wheel; the moving wheel contacts with and is propped to the outer edge of the cam; when being driven by the external force to rotate, the rotating shaft can drive the cam to rotate to push the movable wheel and the propping rod to move by reciprocating, then a ball valve element of the liquid feeding valve is propped by the propping rod to be opened, and thus the liquid feeding valve can be opened. Compared with the prior art, the reciprocating type plunger pump has the advantages that the liquid feeding valve is propped and opened through a cam-shaped linear surface, the valve is instantaneously lifted to reach a high altitude to be completely opened and absorbed, so as to lower down the flowing speed of the fed liquid, and a valve clearance is maximized to enable the liquid to smoothly flow into a valve cavity.

Description

technical field [0001] The invention relates to a reciprocating plunger pump. Background technique [0002] The reciprocating plunger pump is a positive displacement pump, and the main conveying medium is usually water, oil, chemical agent, emulsion, polymer, mud, ore slurry and various liquids with viscosity and corrosion. The reciprocating plunger pump has the characteristics of high pressure, high pump efficiency, large self-control range, constant pressure during frequency regulation and volume control, and is especially suitable for oilfield water injection frequency regulation and energy-saving working conditions. The efficiency of the reciprocating plunger pump is closely related to the working state of the valve group. The leakage of the valve will affect the volume coefficient of the pump, and the opening and closing delay of the valve will also directly affect the pump efficiency. It is difficult to improve the pump efficiency for the medium with viscosity. When t...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a reciprocating plunger pump for the above-mentioned prior art, which can forcibly open the liquid inlet valve, and change the conventional reciprocating plunger pump plunger to open the liquid inlet valve by vacuum degree when sucking, and overcome the Solved the problems of low pump efficiency and large horse-drawn carts when injecting high-viscosity media, and improved pump efficiency to reduce the viscosity reduction rate of polymers

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