Plunger pump and control method thereof

Abstract

The invention discloses a plunger pump and a control method thereof. The plunger pump comprises a pump body and at least two plungers. A magnet exciting coil is arranged on the outer side of the pumpbody. The plungers are movably installed in the pump body. Each plunger is provided with a check valve. The stroke of a single moving period of each plunger comprises a working stroke and a resettingstroke, wherein time of the working stroke is longer than time of the resetting stroke. At least one plunger in the pump body is always at the working stroke. According to the plunger pump, the magnetexciting coil drives the plungers in the pump body to work, then the plungers are reset through reset springs, fluid in the pump body flows through the check valves of the plungers, and as the magnetexciting coil is arranged outside the pump body, liquid flowing in the pump body well solves the problem of heat dissipation. In addition, the time of the working stroke of each plunger is longer than the time of the reset stroke, at least one plunger always works in the pump body, and thus continuity of water output of the plunger pump is ensured. The plunger pump is simple in structure and reliable in operation.

Description

Technical field [0001] The invention relates to a plunger pump and a control method thereof in the technical field of fluid transportation. Background technique [0002] The plunger pump can be described as one of the oldest pump types. It has the advantages of high pressure, high metering accuracy, low start-stop inertia, no need for pre-injection of water, and easy control. However, most of the existing plunger pumps are complicated in structure, mainly due to two reasons: First, most of the existing plunger pumps convert the rotational energy into the linear motion energy required by the plunger through the crank connecting rod; More complicated check valves and pipelines achieve the purpose of continuous flow. [0003] Chinese invention patent CN2720163 discloses an alternating current automatic water supply water pump, which uses electromagnetic force to drive a water pump plunger. In addition to the check valve at the water outlet, another check valve is arranged on the plun...

AI Technical Summary

Problems solved by technology

However, because it uses a single plunger, it can only provide pulsed water flow; in addition, because one of the check valves is arranged on the pump body, the overall structure of the water pump is still relatively complicated, which is not only expensive, but also cannot be used in some places where the space is restricted. limited occasions

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