The present invention is simple and durable by implementing the injection device by the ball valve, and also the liquid phase of the automatic packaging machine to correct the difference by the amount of filling caused by the change of water pressure according to the liquid level It is an object to provide a water injection device.;The purpose of this is to provide a liquid injecting device in which a valve and a liquid injecting tube are opened and closed at an outlet of a hopper installed at an upper portion of an automatic liquid packing machine, wherein the flow passage is formed in a straight tube shape. The valve is installed in the ball valve is configured, the side of the flow passage is provided with a bracket, the inner gear of the driven gear and the driven gear is engaged, the shaft of the driven gear is supported on the body of the bracket is the ball In addition to being configured to be connected to the valve, the shaft of the motive gear is achieved by being connected to the shaft of the motor supported by the body of the bracket and configured to be powered.
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