JPH05319491A - Filling device - Google Patents

Abstract

PURPOSE:To prevent the dripping of liquid from a particularly elongated and large-sized filling nozzle and also prevent the scattering and bubbling of liquid during filling operation. CONSTITUTION:A valve structure having a two-step closing function consisting of a valve body 9 and a scraper 11 is provided in a nozzle portion 2 having an inlet port 2c and a nozzle port 2a. During filling operation, both the valve body and scraper are opened to effect filling operation. Upon completion of the filling operation, the valve body 9 is closed, and the scraper 11 is slid down to the nozzle port 2a to expel liquid stuck on the inner face of the nozzle portion 2. Further, during filling operation, a filling nozzle 1 is moved up according to the rise of a liquid level in a container to be filled with liquid so as to have predetermined relationship between the nozzle port and the liquid level, so that a distance between the nozzle port 2a and the liquid level can be kept so as to cause neither scattering nor bubbling of liquid.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a filling device for quantitatively filling a liquid in a filling container, and more particularly to a filling device having a function of preventing scattering, foaming, and dripping of the filling liquid during filling. Regarding

[0002]

2. Description of the Related Art In many cases, the final step of the fluid industry includes a filling step of filling a fixed amount of fluid in a filling container to convey a liquid. The filling liquid includes various commercially available drinks and medicines, small ones, and oils such as food oil, lubricating oil, fuel oil, etc., or chemicals and liquids. A wide variety of filling containers are available, which are shaped according to the purpose of these filling liquids. 2. Description of the Related Art Conventionally, the measuring method of a filling device for quantitative filling is largely classified into a cylinder method and a weighing method. In the cylinder system, a plurality of cylinders are mainly used to provide a float representing the liquid level in the cylinder, and the position of the float is detected to determine a constant volume. In the filling method of the filling liquid, when the temperature of the liquid changes, the volume of the filling liquid changes, and the density changes due to the change of the blend (mixing) ratio, so that the correct amount of filling cannot be performed, Used in filling machines that do not require accurate weighing. In the weighing method, for example, a load cell is arranged at the position where the filling container is placed on the circumference of a rotating disk where the filling container is transported, and the weight of the filling liquid including the weight of the filling container is measured by the load cell. Then, the valve of the filling nozzle is opened / closed so that this amount becomes constant. The weighing method has high filling accuracy, but the weight of the filling container is not always constant, and the important variation of the filling container influences the filling accuracy.

Generally, the filling nozzle for filling a filling container is a combination of a valve and a pipe, and a dedicated filling nozzle is used according to the purpose and conditions of the filling control. Some of the latter have a long filling nozzle. With such a long filling nozzle, even after the filling is completed and the valve is closed, the filling liquid adhering to the inner wall surface of the filling nozzle may drip from the nozzle opening, resulting in a large amount of liquid drip and a high filling accuracy. Not only was it lowered, but there was the inconvenience of soiling the floor near the bottom of the nozzle mouth.

Further, the conventional filling nozzle normally waits at a position higher than the horizontally moving filling container, and when the filling container reaches a predetermined position, the filling container is stopped and a fixed distance from the filling port. A two-position operation was carried out in which it descends to perform filling, and when filling is completed, it returns to the standby position. Therefore, the distance between the nozzle port and the liquid surface of the filling liquid changes and becomes smaller as the filling progresses, and finally the nozzle port becomes submerged in the filling liquid. As a result, when the liquid level rises, the dynamic pressure of the liquid fills from the nozzle opening becomes large, so that there is a problem in that the liquid is scattered or bubbles are generated and overflow to the outside.

[0005]

[PROBLEMS] The present invention has been made in view of the above circumstances, and particularly in a filling machine having a filling nozzle that requires a long nozzle portion, a saucer for preventing dripping is attached to the lower part of the nozzle mouth. To prevent dripping without using special means such as controlling the filling time, and to prevent the liquid from scattering and foaming by making the filling conditions constant even if the filling progresses and the liquid level changes. Furthermore, the purpose of the present invention is to rapidly and highly accurately fill the amount of filling without requiring temperature correction or the like.

[0006]

In order to achieve the above object, the present invention provides (1)
A nozzle having a nozzle opening at one end and an inlet for introducing a filling liquid at the other end, the nozzle having a valve seat on the inner wall between the nozzle opening and the inlet of the cylindrical body; A first actuator that is arranged coaxially with the other end of the nozzle and that drives a valve body that cooperates with the valve seat; and a first actuator that is located below the valve body when filling and slides on the inner wall surface of the nozzle portion when filling is completed. A filling nozzle including a scraper that is driven to be located at the end of the nozzle opening and a second actuator that is coaxially disposed above the first actuator and that drives the scraper; When it reaches, the nozzle of the filling nozzle moves to the vicinity of the bottom of the filling container, and moves upward according to the rise of the liquid level of the filling liquid after the start of filling, and further, (2) In (1) above. , In the above, the filling container for the level of the filling liquid Predetermined by the corresponding charge, and is characterized in that for measuring the filling amount by a mass flow meter. Hereinafter, it demonstrates based on the Example of this invention.

First, the structure of the filling apparatus of the present invention will be described. 2A and 2B are configuration diagrams for explaining the filling device according to the present invention, and FIG. 2A is a side view and FIG.
(B) is a front view, in which 1 is a filling nozzle, 5 is a third actuator, 20 is a filling device, 21 is a filling device main body, 22 is a control device, 23 is an operation panel, 24 is a mass flow meter, Reference numeral 25 is a filling liquid source, 26 is an infusion pump, 27 is a conveyor, 28 is a pedestal, and 29 is a filling container.

The filling device 20 comprises a filling device main body 21, a control device 22, an operation panel 23, a filling nozzle 1 and a mass flow meter 24, and a filling container 29 conveyed by a conveyor 27 arranged on a pedestal 28. The filling liquid infused by the infusion pump 26 from the filling liquid source 25 is measured by the mass flow meter 24 and is filled from the filling nozzle 1. The filling device main body 21 and the control device 22 are integrally configured, and the control device 22 stores the filling amount in the control device 22 according to the setting of the filling amount setting device 23a of the operation panel 23. When the filling container 29 conveyed by the conveyer 27 reaches a fixed position by the push button operation for starting the filling, the filling nozzle 1 descends (position shown in the drawing), and then the mass flow meter 24 measures and reaches the set amount. At this time, the filling nozzle 1 is closed by a command from the control device 22. A relationship between the filling amount and the liquid level in the filling container 29 is stored in advance in the control device 22, and the third actuator 5 is driven according to the filling amount measured by the mass flowmeter 24 to fill the filling liquid. The liquid level and the nozzle opening of the filling nozzle 1 are moved under the condition that the scattering of the filling liquid is the smallest and there is no foaming.

The mass flowmeter 28 is, for example, a Coriolis flowmeter, supported by support members at both ends, and when a U-shaped conduit for flowing a filling liquid is oscillated alternately around a support shaft, the mass-flowmeter 28 is provided between both arms of the U-shaped conduit. This is a direct mass flow meter that utilizes the moment of Coriolis force proportional to the mass flow rate.It does not require temperature compensation of the filling amount that changes depending on the temperature condition of the filling liquid, unlike the cylinder type. As described above, the mass flow rate can be quickly measured and filled without considering the variation in the weight of the filling container.

1A and 1B are views for explaining a filling nozzle of a filling device according to the present invention, and FIG.
1B shows the state immediately after the completion of filling, in which 1 is the filling nozzle, 2 is the nozzle part, 3 is the first actuator, 4 is the second actuator, 5 is the third actuator, and 6 is Is a connecting fitting, 7 is a base of the main body of the filling device, 8 is a valve rod, 9 is a valve body, 10 is a scraper rod, and 11 is a scraper.

In FIG. 1, a filling nozzle 1 has a cylindrical nozzle portion 2, a second actuator 3 coaxially mounted on the upper end portion of the nozzle portion 2, and a coaxially arranged upper end portion of the second actuator 3. An integrated nozzle having a two-stage closing function of a valve, which is composed of a mounted second actuator 4, is joined to a third actuator 5 by a connecting fitting 6, and the third actuator 5 is mounted on the filling device main body base 7. It

The nozzle portion 2 is a cylindrical body having a nozzle opening 2a at one end and an opening at the other end 2e, and has an inflow opening 2c into which the filling liquid flows in on the other end 2e side. A valve seat 2d is formed on the inflow port 2c side in the section between and. The first actuator 3 connected to the other end side 2e of the nozzle portion 2 is for driving the valve body 9 that opens and closes the filling flow flowing to the nozzle portion 2 in cooperation with the valve seat 2d. The valve body 9 is directly connected to the lower end of the valve rod 8, and the other end of the valve rod 8 is provided with a piston 8a pneumatically driven in the cylinder 3a of the first actuator 3. The piston 8a is vertically moved by the air pressure introduced from the air pressure port 3b or 3c. 3d is a seal ring of the valve rod 8.

The second actuator 4 includes a scraper 11
The scraper 11 is a container for filling the liquid adhered to the inner wall surface of the nozzle part 2 through the nozzle port 2a when the scraper 11 slides downward on the inner wall surface of the nozzle part 2 (not shown).
It is for making an action of scraping inward. The scraper 11 is directly connected to the lower end of the scraper rod 10. The scraper rod 10 is liquid-sealed in the shaft of the valve rod 8 and movably penetrates therethrough, and the scraper rod 10 has an upper end in the cylinder of the second actuator 4. It is directly connected to the piston 10a. As described above, the valve body 9 and the scraper 11 are coaxial, so that the valve is a two-stage closed function valve having first and second actuators that are independently driven.

The operation of the filling nozzle 1 having the above structure will be described. FIG. 1A is a view showing the filling process, and the first and second actuators 3 and 4 drive the valve body 9 and the scraper 11 to the upper position of the inflow port 2c to open the valve. By opening the valve, the filling liquid flows from the inflow port 2c to the nozzle port 2
It is filled in a filling container (not shown) with a diameter of a. At this time, the third actuator 5 moves the filling nozzle 1 to the upper portion according to the liquid level in the filling container.
This is not shown in (a) and (b). Figure 1 (b)
FIG. 4 is a diagram showing a state immediately after the filling is completed. When the set filling amount is reached, the first actuator 3 presses the valve body 9 against the valve seat 2d to close the valve depending on the control device 22. At the same time, the second actuator 4 drives the scraper 11 until it comes into pressure contact with the seat 2b on the inner wall of the nozzle opening 2a, thereby preventing the filling liquid in the nozzle portion 2 from being scratched and dripping. The scraper 11 is provided with an air vent hole 11a to ensure stable operation.

[0015]

As is apparent from the above description, according to the present invention, (1) the filling nozzle has a valve structure having a two-stage closing function, and the valve having the two-stage closing function opens simultaneously at the start of filling. When the valve is filled and the filling is completed, one closes the valve and the other one removes the liquid on the inner wall of the nozzle that causes dripping, improving the filling accuracy even when filling with a filling nozzle with a long nozzle length. In order to prevent contamination, and further, the filling nozzle is moved upward in accordance with the liquid level of the filling liquid in the filling container to prevent scattering and foaming of the filling liquid, safe filling can be performed especially when filling dangerous liquid. Further, (2) since the filling amount of the filling liquid is measured by the mass flow meter, temperature correction is not required, and highly accurate and quick measurement can be performed without being affected by the variation in the weight of the filling container.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a filling nozzle of a filling device according to the present invention.

FIG. 2 is a configuration diagram for explaining a filling device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filling nozzle, 2 ... Nozzle part, 3 ... 1st actuator, 4 ... 2nd actuator, 5 ... 3rd actuator, 6 ... Connecting metal fitting, 7 ... Filling apparatus main body base, 8 ... Valve rod, 9 ... Valve body 10 ... scraper rod, 11 ... scraper.

Claims (2)

[Claims] 1. A nozzle part having a nozzle opening at one end and an inflow port for introducing a filling liquid at the other end, and a nozzle part having a valve seat on an inner wall between the nozzle port and the inflow port of the cylindrical body. A first actuator for driving a valve element which is coaxially arranged at the other end of the nozzle portion and cooperates with the valve seat; and a lower portion of the valve element at the time of filling, and an inner circumference of the nozzle portion when the filling is completed. A filling nozzle including a scraper that is driven to slide on the wall surface so as to be positioned at the end of the nozzle opening, and a second actuator that is coaxially arranged above the first actuator and that drives the scraper; When the container reaches a predetermined position, the filling nozzle comprises a third actuator, the nozzle opening of which moves to the vicinity of the bottom of the filling container and which moves upward in response to an increase in the liquid level of the filling liquid after the start of filling. apparatus. 2. The filling device according to claim 1, wherein the liquid level of the filling liquid is predetermined by a filling amount corresponding to the filling container, and the filling amount is measured by a mass flow meter.