Miniature liquid precise-proportioning and adding instrument

Abstract

The invention discloses a miniature liquid precise-proportioning and adding instrument, wherein an A liquid pipe contains adding liquid to be precisely proportioned, a B liquid pipe contains main fluid, the A liquid pipe and the B liquid pipe are intersected to form an A+B proportioning liquid outlet, the A liquid pipe is communicated with a liquid outlet of an A liquid sealing pot, a miniature air pump is communicated with an air inlet of the A liquid sealing pot, an A liquid indicator lamp, a B liquid indicator lamp, a power indicator lamp, a tact switch and an air pressure regulation button are integrated on an PLC (Programmable Logic Controller) control panel, a B liquid electromagnetic valve, the miniature air pump, an A liquid electromagnetic valve, an air pressure control switch, an A liquid level probe and a high-voltage protection switch are respectively connected with serial ports of the PLC control panel and carry out corresponding input or output actions under the control of the PLC control panel. The miniature liquid precise-proportioning and adding instrument provided by invention can realize balanced and synchronous proportioning and addition of two or more than two liquids by adopting a structure that the constant pressure of the miniature air pump is combined with an ejection-absorption principle of the fluid of the B liquid pipe and the A liquid, and can be widely applied to industries of water home appliances, beverages, health care products, and the like.

Description

Technical field: [0001] The patent of the present invention relates to a liquid proportioning instrument, in particular to an ultra-high-precision liquid proportioning device that can reach or exceed a finer ratio of 1:100 to 1:1000 L / Min in industries such as water appliances, beverages, and health care products. than adding instrument. Background technique: [0002] At present, there is no small-sized instrument specially used for precise addition of liquid proportioning in the market; as a temporary substitute, most of the flow control instruments currently being produced and sold in the market have the following defects: one is a single-channel liquid The flow control instrument cannot achieve the ratio addition of two or more liquids; secondly, it cannot realize the linkage between the added liquid and the main fluid, and the added liquid cannot be added in a balanced and synchronous manner with the main fluid; the last point is more difficult to achieve. For the preci...

AI Technical Summary

Problems solved by technology

[0002] At present, there is no small-sized instrument specially used for precise addition of liquid proportioning in the market; as a temporary substitute, most of the flow control instruments currently being produced and sold in the market have the following defects: one is a single-channel liquid The flow control instrument cannot achieve the ratio addition of two or more liquids; secondly, it cannot realize the linkage between the added liquid and the main fluid, and the added liquid cannot be added in a balanced and synchronous manner with the main fluid; the last point is more difficult to achieve. The precise ratio of the added liquid to the main fluid, the accuracy of the highest precision flow controller can only be customized to about 100ml / Min, it is impossible to achieve the precise ratio of the added liquid to one thousandth when the main fluid is below 1000ml / Min

Moreover, this type of flow control instrument has complex systems, large structure, large power consumption, high product cost, and limitations in measurement accuracy, work reliability, and anti-interference ability. Especially, electromagnetic flowmeters also have conductivity to fluid media, Minimum flow rate, non-oily medium and other characteristic requirements

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