Two-way piston pump and control method thereof

Abstract

The invention is suitable for the field of piston pumps, and provides a two-way piston pump and a control method thereof. The piston pump comprises a control system, a first one-way metering pump, a second one-way metering pump, a first driving mechanism and a second driving mechanism; the control system controls operation or standing of the first and second driving mechanisms; the first and second one-way metering pumps are respectively connected with the first and second driving mechanisms; each one-way metering pump has a hollow cavity, a sucking port and a discharge port; the cavity is communicated with the sucking port and the discharge port; a pneumatic ball valve is mounted in the sucking port; a one-way valve is mounted in the discharge port; each driving mechanism includes a piston rod capable of extending; the end parts of the piston rods are inserted in the cavities of the one-way metering pumps, and perform a reciprocating motion in the cavities; and the control system controls the first and second driving mechanisms to drive reverse movement of the two piston rods. The piston pump has two sets of one-way piston metering pumps; one set is for feeding, and the other set is for discharging; and the two sets are alternately operated to realize continuous discharge of the piston pump.

Description

technical field [0001] The invention belongs to the field of piston pumps, in particular to a bidirectional piston pump and a control method thereof. Background technique [0002] The piston pump is a reciprocating metering pump. Its working principle determines that after completing a working stroke, it needs to move in the opposite direction to suck the material. There is a vacuum period of work, and it cannot work continuously. [0003] At present, most of the piston pumps on the market work in one direction and cannot work continuously, which is a waste of time. A small number of bidirectional piston pumps can also achieve continuous operation, but there is a phenomenon of flow interruption in continuous operation, which cannot achieve uniform discharge and inaccurate control of discharge speed. SUMMARY OF THE INVENTION [0004] The technical problem to be solved by the present invention is to provide a bidirectional piston pump and a control method thereof, aiming at...

AI Technical Summary

Problems solved by technology

[0002] The piston pump is a reciprocating metering pump. Its working principle determines that after completing a working stroke, it needs to move in reverse to absorb material. There is a working vacuum period and it cannot work continuously.

[0003] Most of the piston pumps currently on the market work in one direction and cannot work continuously, which is a waste of time

A small number of two-way piston pumps can also work continuously, but there is a flow interruption phenomenon during continuous work, and it is impossible to achieve uniform discharge, and the discharge speed control is not accurate

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