Reverse control valve, reverse dosing filling machine and filling method thereof

Abstract

The invention discloses a reverse control valve, a reverse dosing filling machine and a filling method thereof. The reverse dosing filling machine comprises a base and a liquid supply device arranged on the base, and a bottle covering device and a bottle body lifting device are sequentially arranged below the liquid supply device. The reverse dosing filling machine further comprises a reverse control valve, wherein the reverse control valve is used for exhausting during filling and liquid level control by evacuation after exhausting. Therefore, by switching the air flow direction of the reverse control valve, the exhausting during filling and the liquid level control by evacuation after exhausting can be realized, the two actions can be mutually switched, and the invention has simple structure and convenient operation, and is beneficial to saving the production cost. And, materials covering an air pipe can be rapidly pumped by evacuation, which keeps a height close to the lower end ofthe air pipe, more accurately controls the filling quantity, improves the filling liquid level control accuracy, and is beneficial to ensuring the stability and the reliability of filling.

Description

technical field [0001] The invention relates to the technology in the field of liquid filling equipment, in particular to a reversing control valve, a reversing quantitative filling machine and a filling method thereof. Background technique [0002] The filling machine is a kind of mechanical equipment used to fill various filling materials such as gas-containing liquid, non-gas liquid and paste into various packaging containers such as bottles, cans, boxes, barrels or bags. Packing can not only improve labor productivity, reduce product loss, ensure packaging quality, but also reduce mutual pollution between the production environment and the materials to be packed. Therefore, the filling machine has been widely used in the automatic filling production of pharmaceutical, daily chemical, food and special industry factories. According to the filling principle, filling machines include vacuum filling machines, normal pressure filling machines, reverse pressure filling machine...

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Problems solved by technology

[0003] However, although the above-mentioned existing filling machine can realize the basic functions of its filling operation, it is found that there are still many deficiencies in its own structure and performance in actual use, and it cannot achieve the best use effect and work performance. efficacy

Its shortcomings are especially reflected in: during the filling process, the exhaust during filling and the control of the liquid level after filling are two different actions. Corresponding to these two different actions, the traditional method uses two different device, and for the control of the liquid level after filling, it is difficult for the general simple device to achieve fast and effective precise control. If the precise control of the liquid level is required, more complex sensing devices such as electronic devices must be used, so that Increased production costs, do not use to save production costs and improve production efficiency

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