Liquid filling device

Abstract

The present invention provides a liquid filling device that can shorten the filling time and accurately fill a desired amount. [Solution] The liquid filling device 1 of the present invention comprises a cylinder body 3, a liquid inlet / outlet means 5, and a drive means 7. The cylinder body 3 comprises a cylinder 31 and a piston 33 that slides on an electric slider 35. The drive means 7 comprises a servo motor 71, a servo amplifier 73, and a controller 75, and is electronically cam controlled. The electronic cam control is set by the amount of liquid filling and at least one of the maximum flow velocity of the liquid flowing into the cylinder 31 or the maximum flow velocity of the liquid flowing out of the cylinder 31.

Claims

1. A liquid filling device comprising a cylinder body, a liquid inlet / outlet means, and a driving means, The cylinder body comprises a cylinder and a piston that slides with an electric slider, The liquid inlet / outlet means comprises an inlet means and an outlet means, The inflow means comprises an inflow pipe for introducing a liquid and an inflow valve for preventing backflow of the liquid. The discharge means comprises a discharge pipe for discharging the liquid and a discharge valve for preventing backflow of the liquid. The drive means comprises a servo motor, a servo amplifier for generating an electronic cam curve, and a controller. The controller is configured to set the amount of liquid to be filled and at least one of the maximum flow velocity of the liquid into the cylinder or the maximum flow velocity of the liquid out of the cylinder, and to control the generation of the electronic cam curve by the servo amplifier. The maximum value of the inflow velocity and the maximum value of the outflow velocity can be set to different values. The servo amplifier electronically cam-controls the servo motor, The servo motor drives the electric slider by electronic cam control. The maximum value of the inflow velocity is 0.1 m / s or more and less than 8 m / s when the density of the liquid is higher than 900 kg / cubic meter and 1200 kg / cubic meter or less, and 0.1 m / s or more and less than 0.7 m / s when the density of the liquid is higher than 1200 kg / cubic meter and less than 1400 kg / cubic meter. Liquid filling device.

2. The maximum value of the inflow velocity is 0.1 m / s or more and less than 8 m / s when the viscosity of the liquid is higher than 0.5 mPa·s and 900 mPa·s or less, and 0.1 m / s or more and less than 0.7 m / s when the viscosity of the liquid is higher than 900 mPa·s and 5000 mPa·s or less. The liquid filling apparatus according to claim 1.

3. The maximum value of the inflow velocity is 0.1 m / s or more and less than 3.5 m / s when the boiling point of the liquid is higher than 40 degrees and 60 degrees or less, 0.1 m / s or more and less than 5.5 m / s when the boiling point of the liquid is higher than 60 degrees and 80 degrees or less, and 0.1 m / s or more and less than 7.7 m / s when the boiling point of the liquid is higher than 80 degrees and 100 degrees or less. The liquid filling apparatus according to claim 1.

4. The maximum value of the outflow velocity is set based on the foaming properties of the liquid being filled. 200 ml of liquid is discharged at a flow rate of 2.00 m / s from a discharge nozzle with an inner diameter of 8 mm into a container with an inner diameter of 85 mm, cylindrical sides, and a horizontal bottom, and the distance from the tip of the discharge nozzle to the top surface of the bottom of the container is 200 mm. Under the following conditions: suction pipe inner diameter 19.5 mm, suction pipe length 800 mm, head 600 mm, temperature 30 degrees Celsius, and standard atmospheric pressure (101.3 kPa), If we define a foaming index as follows: a liquid with a foam height of 10 mm or less immediately after filling as foaming index 1; a liquid with a foam height of more than 10 mm but 15 mm or less immediately after filling as foaming index 2; a liquid with a foam height of more than 15 mm but 20 mm or less immediately after filling as foaming index 3; a liquid with a foam height of more than 20 mm but 25 mm or less immediately after filling as foaming index 4; and a liquid with a foam height of more than 25 mm immediately after filling as foaming index 5, then, The maximum outflow velocity of the liquid is as follows: for liquids with a foaming index of 2, it is 0.1 m / s to 2.5 m / s; for liquids with a foaming index of 3, it is 0.1 m / s to 2.0 m / s; for liquids with a foaming index of 4, it is 0.1 m / s to 1.75 m / s; and for liquids with a foaming index of 5, it is 0.1 m / s to 1.5 m / s. Liquid filling apparatus according to claim 1

5. A liquid filling method using the liquid filling apparatus described in Claim 1, The electronic cam setting process involves setting a desired cam curve for the electronic cam, A liquid inflow step in which the liquid to be filled is introduced into the cylinder, A liquid discharge process in which a liquid is discharged from a cylinder, A liquid filling method comprising the following.

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