JP4379170B2 - Pressure filling device - Google Patents

Description

  The present invention relates to a pressure filling device, and more particularly to a pressure filling device in which a filling liquid is mixed and mixed so as to circulate and stir in order to uniformly mix and fill the filling liquid. It is.

  In a filling device that fills a container with a filling liquid in which a solid material (content having a property of being settled without dissolving in the liquid) and the liquid are filled, the filling liquid stored in the filling liquid tank is constantly stirred. Otherwise, since the solid matter is precipitated, it is difficult to fill the liquid by mixing the solid matter in a uniform ratio. Therefore, in such a filling apparatus, a mechanism is provided for constantly stirring the filling liquid during the filling operation (see, for example, Patent Document 1 and Patent Document 2).

  The invention described in Patent Document 1 states that “the main tank 2 and the manifold 8 are connected by a liquid supply passage 6 provided with an opening / closing valve 10, and the bottom of the manifold 8 and the main tank 2 are connected by a circulation passage 34. Filling is performed by a filling mechanism 26 connected to the manifold 8. The manifold 8 is constantly pressurized by the second pressurizing means 20, and the main tank 2 is first pressurized via the solenoid valve 12. The main tank 2 is communicated with the means 20 and can be switched between a state in which the main tank 2 is pressurized to a pressure higher than that of the manifold 8 and a state in which the main tank 2 is opened to the atmosphere. And the solenoid valve 12 opens the inside of the main tank 2 to the atmosphere. Through the ring passage 34 is adapted to "is fed to the main tank 2 of the low pressure.

  The invention described in Patent Document 2 has the following configuration. That is, “liquid is pumped from the open container 8 by the centrifugal pump 2. The liquid flows through the piping system 25, further flows through the pump 2, and enters the manifold 5. The manifold 5 is opened with a solenoid valve 9. A pipe or outlet 8 is connected and led from an open end of the outlet to a vessel such as a flask, etc. At the end of the manifold 5 is a pressure control valve 6, and the liquid is then opened through another tube or liquid transport material 7. "Return to container 8"

  In a filling device that fills a container with a filling liquid mixed with solid matter, when the filling solution is stirred, if the size of the solid matter is large and the content rate is high, it must be uniformly circulated at a high flow rate. It cannot be stirred. Even in the configuration of the invention described in Patent Document 1, a large flow rate can be obtained if a high pressure is applied to the main tank 2, but if a filling liquid is supplied into the manifold 8 during the filling operation, the pressure in the manifold Will fluctuate greatly. In filling by measuring the amount of filling with a timer filling or flow meter, it is desirable that the pressure applied to the filling liquid is constant.If the pressure fluctuates greatly during filling, the filling accuracy will vary. The problem of end up occurs. In particular, filling liquids for medicines are often filled in a very small amount, and it is necessary to suppress variations in filling accuracy slightly, so that pressure fluctuation is a very big problem.

In the configuration of the invention described in Patent Document 2, a circulation path is formed by the open container 24, the piping system 25, the manifold 5 and the circulation path 34, and the filling liquid is circulated only by the pump 2, so that the inside of the manifold There is a risk that air remains and a gas phase portion is generated. However, when the gas phase portion is generated, there is a problem that pressure fluctuation occurs. However, nothing is considered about the countermeasure. Further, when the filling liquid stored in the open container 24 (tank) is supplied to the manifold 5 by the pump 2, pulsation is likely to occur due to pressure fluctuation due to increase / decrease in the filling liquid stored in the open container 24. As a result, there has been a problem in that pressure fluctuations also occur in the filling liquid supplied to the manifold.
Japanese Patent Laying-Open No. 2003-312783 (page 2-4, FIG. 1) JP 58-149296 A (page 2-4, FIG. 1)

  The problem to be solved is that pressure fluctuation occurs in the filling liquid supplied to the manifold, causing pulsation, and filling accuracy is deteriorated.

  The present invention provides a storage tank in which a filling liquid is stored, a manifold communicated with the storage tank via a liquid supply passage, a filling means connected to the manifold, and pressurizing the filling liquid in the storage tank. In a pressure filling apparatus that includes a pressurizing means for feeding to the liquid supply passage and performs filling while supplying the filling liquid to the manifold at a predetermined pressure, a circulation passage communicating between the manifold and the storage tank, and a circulation passage A circulation pump that recirculates the filling liquid from the manifold to the storage tank, pressurizes the filling liquid in the storage tank by the pressurizing means, and supplies the filling liquid to the manifold while the filling liquid in the manifold is stored in the storage tank by the circulation pump. By the pressurizing means so that a larger amount of filling liquid than the amount discharged from the manifold can be supplied. By controlling the pressure, and is characterized in that to prevent the gas phase is generated in the manifold.

  The pressure filling device of the present invention controls the pressure applied by the pressurizing means for applying a pressure in the storage tank and supplying the filling liquid to the manifold so that no gas phase portion is generated inside the manifold. The effect of preventing the pressure fluctuation in the manifold due to the fluctuation of the filling liquid level stored in the manifold and enabling the filling with high accuracy is obtained.

  The storage tank, liquid supply passage, manifold and circulation passage form a closed circuit, the filling liquid in the storage tank is pressurized by the pressurizing means and supplied to the manifold, and the container is filled by the filling means connected to the manifold. In addition, a simple configuration that recirculates from the manifold to the storage tank by the operation of the circulation pump and controls the pressure by the pressurizing means so as not to generate a gas phase portion in the manifold prevents pressure fluctuation, Achieving the goal of precise filling.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a circuit diagram showing a simplified configuration of a pressure filling device according to an embodiment of the present invention. In the figure, reference numeral 2 denotes a main tank, which stores a filling liquid 4 in which a solid material (content that does not dissolve in water and has a property of settling) and a liquid are mixed. The main tank 2 communicates with the manifold 8 via a liquid supply passage 6 connected to the bottom side. Further, the downstream side of the manifold 8 communicates with the main tank 2 through a circulation passage 10, and constitutes a closed circuit of the main tank 2 → the liquid supply passage 6 → the manifold 8 → the circulation passage 10 → the main tank 2. ing. The downstream end of the circulation passage 10 is disposed in the filling liquid 4 stored in the main tank 2.

  The main tank 2 is connected to a pressurized gas supply source (pressurizing means) 14 via an auto regulator 12, and the filling liquid 4 stored in the main tank 2 is pressurized at a predetermined pressure. The With this pressure, the filling liquid 4 in the main tank 2 is sent to the manifold 8. The gas used to pressurize the main tank 2 is an inert gas such as argon or nitrogen. In addition, a circulation pump 16 is disposed in the circulation passage 10, and the filling liquid is returned to the main tank 2 from the downstream side of the manifold 8.

  A stirring blade 18 is installed in the main tank 2 and is stirred so that the solid content of the filling liquid 4 stored in the main tank 2 does not precipitate. Further, the main tank 2 is provided with a level sensor 20, which detects the liquid level of the filling liquid 4 in the main tank 2 and sends it to the control device 22. The control device 22 stores the relationship between the filling liquid level in the main tank 2 and the pressurizing force applied from the pressurized gas supply source 14, and the control device 22 responds to a signal from the level sensor 20. Then, the auto regulator 12 is controlled so as to feed the manifold 8 with a constant pressure.

  In this embodiment, the manifold 8 has an inner diameter that is slightly larger than the piping of the liquid supply passage 6 and the circulation passage 10. For example, when the pipes of the liquid supply passage 6 and the circulation passage 10 are about φ30, the diameter of the manifold 8 is about φ50. The manifold 8 may be constituted by a pipe having the same diameter as that of the liquid supply passage 6 and the circulation passage 10. The manifold 8 is provided with a pressure gauge 24, detects the filling liquid pressure in the manifold 8, and sends a detection signal to the control device 22. The control device 22 determines whether or not the detected pressure is within a predetermined range.

  A plurality of filling means 26 are connected to the manifold 8. The filling means 26 fills the container (not shown) from the filling nozzle 30 with the filling liquid supplied to the manifold 8 by opening and closing the filling valve 28. The filling flow rate is measured by the flow meter 32, and the measurement signal is input to the control device 22. When the filling amount reaches a predetermined filling amount, the filling valve 28 is closed and the filling is finished.

  The operation of the pressure filling apparatus having the above configuration will be described. The main tank 2 communicates with a pressurized gas supply source 14 via an auto regulator 12, and a filling liquid 4 stored in the main tank 2 by an inert gas sent from the pressurized gas supply source 14. Is pressurized, and the filling liquid 4 is supplied from the liquid supply passage 6 to the manifold 8 by this pressure.

  When a container (not shown) is supplied below each filling nozzle 30, the plurality of filling means 26 connected to the manifold 8 opens the filling valve 28 and starts filling, and the flow meter 32 measures. When the flow rate reaches a predetermined value, the control device 22 closes the filling valve 28 according to the signal and finishes the filling. Further, the filling liquid in the manifold 8 supplied from the main tank 2 is stored in the main tank 2 from the circulation passage 10 by the operation of the circulation pump 16 except for the amount filled in the container by the filling means 26. The filling liquid 4 is refluxed.

  In this embodiment, the pressure applied to the main tank 2 by the pressurized gas supply source 14 is controlled so that a larger amount of filling liquid than the amount of filling liquid discharged from the manifold 8 can be supplied. By controlling the pressure applied to the main tank 2 in this manner, control is performed so that no gas phase portion is generated in the manifold 8. For example, when the amount of liquid filled in the container from the filling means 26 is 0.5 liter / min and the amount of liquid recirculated from the circulation passage 10 is 15 liter / min, 15.5 liters is supplied to the manifold 8. The pressure applied by the auto-regulator 12 is controlled so that a filling liquid of / min or more can be supplied.

  As described above, the main tank 2, the liquid supply passage 6, the manifold 8 and the circulation passage 10 constitute a closed circuit, and the filling liquid is constantly circulated and constantly stirred while filling. Can be mixed and filled so that the ratio of the solid to the liquid is always uniform. Further, the filling amount is larger than the sum of the amount of liquid filled in the container from the manifold 8 via the filling means 26 and the amount of liquid returned from the manifold 8 to the main tank 2 via the circulation pump 16. Since the pressure in the main tank 2 is controlled so that the liquid can be supplied from the main tank 2 to the manifold 8, it is possible to prevent a gas phase portion from being generated in the manifold 8, and the circulation passage. 10 is arranged in the liquid 4 of the filling liquid 4 stored in the main tank 2, so that all the closed circuits of the main tank 2 → the liquid supply passage 6 → the manifold 8 → the circulation passage 10 → the main tank 2. In this way, the gas phase portion is prevented from being generated, so that the pressure fluctuation of the filling liquid can be suppressed. Therefore, even a filling device that fills a very small amount of medicine or the like can be filled with high accuracy.

It is a circuit diagram which simplifies and shows the whole structure of a pressure filling apparatus. Example 1

Explanation of symbols

2 Storage tank (main tank)
6 Liquid supply passage 8 Manifold 10 Circulation passage 14 Pressurizing means (pressurized gas supply source)
16 Circulating pump 26 Filling means

Claims (1)

A storage tank for storing the filling liquid, a manifold communicated with the storage tank via the liquid supply passage, a filling means connected to the manifold, and pressurizing the filling liquid in the storage tank to the liquid supply passage A pressure filling device that performs filling while supplying a filling liquid to the manifold at a predetermined pressure.
A circulation passage communicating between the manifold and the storage tank, and a circulation pump provided in the circulation passage for returning the filling liquid from the manifold to the storage tank;
While the filling liquid in the storage tank is pressurized by the pressurizing means and supplied to the manifold, the filling liquid in the manifold is circulated back to the storage tank by the circulation pump, and the amount of the filling liquid discharged from the manifold is larger than that. A pressure filling apparatus characterized in that a gas phase portion is prevented from being generated in a manifold by controlling the pressure applied by the pressurizing means so that a large amount of filling liquid can be supplied.

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