Metering pump

Abstract

The invention discloses a metering pump, which comprises a pump motor, an impeller shaft, an impeller, a liquid inlet, a liquid outlet and a control unit, wherein the liquid inlet and the liquid outlet are arranged in a working cavity of the pump motor, the liquid outlet is provided with a discharge cover, a pressing block is arranged at the outer part of the lower end of the discharge cover, the end of the liquid inlet is connected with a feeding box by a liquid inlet pipe, and the feeding box is provided with a feeding hole; a discharge cover detection device detects a discharge cover opening signal and outputting the discharge cover opening signal to a central processing unit; the central processing unit receives the discharge cover opening signal so as to start timing control to calculate flow, meanwhile, the central processing unit outputs the signal to a pump motor start / stop control circuit to start the pump motor, and after the timing time is over, the central processing unit outputs the signal to the pump motor start / stop control circuit to stop the pump motor; and a key input circuit is connected with an input end of the central processing unit, and an output end of the central processing unit is connected with an input end of a display circuit. According to the metering pump, the liquid flow can be metered through the timing function of the control unit, so that the timing is accurate, and the liquid metering is also accurate.

Description

technical field [0001] The invention relates to the field of metering pumps, in particular to a metering pump for accurate liquid metering. Background technique [0002] At present, there is a great demand for metering pump products in the market, but most of the metering pumps on the market are piston metering pumps, which are expensive, complex in structure, and inconvenient to maintain, which largely limits metering. Promote the use of pumps. Although ordinary pumps are lower in cost, they cannot achieve the function of metering. Contents of the invention [0003] The object of the present invention is to provide a metering pump with low cost and accurate liquid metering. [0004] The present invention adopts the following technical solutions: a metering pump, including a pump motor, the pump motor is connected to an impeller shaft, the impeller shaft is provided with an impeller, and the working cavity of the pump motor is provided with a liquid inlet and a liquid ou...

AI Technical Summary

Problems solved by technology

[0002] At present, there is a great demand for metering pump products in the market, but most of the metering pumps on the market are piston metering pumps, which are expensive, complex in structure, and inconvenient to maintain, which largely limits metering. Promote the use of pumps

Although ordinary pumps are lower in cost, they cannot achieve the function of metering.

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