In the filling of soda, small champagne and beer, most of them are filled under the same pressure, and the process is as follows:
(1) In the initial position, the bottle did not touch the filling valve, and all gas and liquid channels were closed.
(2) The inflatable pressure bottle and the inflatable valve cover rise to a predetermined position together, then the inflatable valve is opened by rotating the fork, and the pressurized gas enters the bottle from the annular storage tank through the inflatable channel.
(3) Liquid injection and air return When the pressure in the bottle reaches the pressure of the storage tank, the liquid valve will automatically open, and the liquid must flow down the bottle wall by the shunt umbrella. At the same time, the displaced pressure gas in the bottle will return to the liquid injection tank through the air return pipe, and the liquid injection will end when the liquid level in the bottle reaches the lower mouth of the air return pipe.
(4) The valve closes the rotary fork, and the pressure gas valve and the liquid valve are closed.
(5) Open the carbon dioxide charging valve at the top of the charging, and charge carbon dioxide or other inert gas into the bottle from the annular groove to drive away the air at the bottleneck.
(6) pressure relief valve is opened, and the pressure in the bottle escapes into the annular groove through the needle valve in the pressure relief channel. Many drinks, such as fruit juice, milk drinks, syrup in the second filling of soda water, do not contain carbon dioxide themselves, and generally use atmospheric filling machines.
Atmospheric filling machine is mainly composed of filling system, bottle inlet and outlet mechanism, bottle lifting mechanism, workbench and transmission system. Used for filling liquid without gas, this filling machine is generally rotary.
Under the action of the transmission system, the rotating shaft drives the turntable and the quantitative cup to rotate together, and the liquid material flows into the quantitative cup from the storage barrel through the pipeline by its own weight. The bottle holder drives the bottle to rise under the action of the cam. When the bottle mouth is pressed against the gland plate, the spring is compressed, and at this time, the slide valve slides upward in the inner hole of the movable measuring cup. With the rotation of the rotating shaft, the set measuring cup has moved away from below the feed pipe and entered the filling position. When the slide valve rises to open the liquid inlet hole, the liquid material flows into the bottle, and the gas in the bottle is discharged from the four small grooves on the lower surface of the gland plate, thus completing the filling task of a bottle. With the rotation of the turntable, the quantitative cup gradually enters directly below to complete the quantitative work, and when it turns from the quantitative position to the filling position, it starts to fill the bottle again, and so on. It is usually called a vacuum filling machine. In this filling method, the storage tank is kept at normal pressure. During the filling process, only the inside of the bottle is evacuated. When the vacuum degree reaches a certain level, the liquid flows into the bottle through the pressure difference between the liquid filling box and the container, and the filling is completed. It is mainly used for filling liquids without gas, such as juice. Because the filling is carried out under vacuum, the filling can be stopped if the bottle leaks, which can reduce the loss. But under vacuum, some scented liquids will lose some fragrance.
The negative pressure filling method requires strict bottle specifications, because its quantification is determined by the depth of the filling nozzle entering the bottle, and the volume of the bottle directly affects the quantitative accuracy. However, it is still widely used because of its convenient adjustment.