Hydraulic diaphragm type metering pump

Abstract

The invention provides a hydraulic diaphragm type metering pump, and belongs to the technical field of liquid metering. The hydraulic diaphragm type metering pump comprises a cylinder cover, a diaphragm, a driving shell, a first flexible bag body and a second flexible bag body; a driving plate is arranged in the driving shell in a sliding mode, and a first oil conveying cavity and a second oil conveying cavity are defined between the inner wall of the driving shell and the driving plate; the first flexible bag body is arranged in a first cavity, the second flexible bag body is arranged in a second cavity and communicates with the second oil conveying cavity, the first flexible bag body pushes the diaphragm to the second cavity by means of hydraulic oil pressed into by the first oil conveying cavity, so that a first liquid inlet valve sucks liquid, and a second liquid outlet valve discharges the liquid; and the second flexible bag body pushes the diaphragm to the first cavity by means of hydraulic oil pressed into by the second oil conveying cavity, so that a second liquid inlet valve sucks liquid, and a first liquid outlet valve discharges the liquid. According to the hydraulic diaphragm type metering pump, the liquid can enter and be discharged every time the diaphragm moves, the number of times of deformation is reduced, and then the service life of the diaphragm and the service life of the whole metering pump are prolonged.

Description

technical field [0001] The invention belongs to the technical field of liquid metering, and more specifically relates to a hydraulic diaphragm metering pump. Background technique [0002] There are many types of metering pumps currently in use, among which hydraulic diaphragm metering pumps are a kind of diaphragm reciprocating pumps that are widely used. The working principle of the hydraulic diaphragm reciprocating pump is: the motor drives the worm gear, and the rotational motion of the motor is converted into the reciprocating motion of the plunger through the deflection mechanism. The reciprocating motion of the plunger pushes the hydraulic oil, and the hydraulic oil pushes the diaphragm to reciprocate to realize the suction of the medium. and discharge. However, the existing metering pump diaphragm deforms once under the action of hydraulic oil, corresponding to the suction or discharge of the medium, and the diaphragm deforms twice to realize a cycle. Due to the freq...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a hydraulic diaphragm metering pump, which aims to solve the problem that the diaphragm can only be deformed twice to realize one cycle, and the service life of the diaphragm is affected due to the large number of diaphragm deformations.

Images