JPS58142098A - Flow-down device for liquefied inert gas - Google Patents

Abstract

PURPOSE:To aim at getting rid of unevenness in injection quentities so much as almost nothing, by injecting liquefied gas into a can gently after turning the gas into a fine filiform something via a filtrable receptacle, while making the injection constant. CONSTITUTION:An inner valve 4 is unified with a shaft 8 provided with a movable spring supporting frame 12 in structure. The position of this shaft 8 depends upon where a vertically driving bar 13 is positioned. Therefore, if it is once determined, the relative positions of the inner valve 4 and a seat valve 5 are as well determined, causing a certain amount of liquefied gas to enter a filtrable receptacle. The liquefied gas entering the filtrable receptacle 6 is once rectified and then flows down from a liquefied gas flow-down port 19 in threadlike form. The dropped liquefied gas is injected into a soft can and unevenness in injection quentities therefore vanishes into almost nothing.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for causing a liquefied inert gas such as liquid nitrogen (hereinafter simply referred to as liquefied gas) to flow down into an unsealed soft container containing contents, for example. Traditionally, non-carbonated beverages and other packaged products have been manufactured using thin-walled metal
iO, 15M aluminum cans or plastic cans (both are referred to as soft) are used 1, and an inert gas such as nitrogen is filled in, and the pressure inside the can is reduced to t-^ Despite the use of thin-walled soft- First, the soft material is designed to prevent deformation and damage during storage and transportation. Various liquefied gas injection devices have been developed for this purpose, but most of them detect the arrival of an unsealed can being sent on a conveyor and open the valve for a moment to inject the liquefied gas. #I let it go down - so I was disappointed.

Furthermore, even if an intermediate receiver was installed between the lower nozzle 61i and -, the injected liquefied gas would be poured into - in the form of droplets in contact with the WL. In this way, in intermittent injection and injection in the form of small droplets, slight time lags, discrepancies in the size of the droplets, and variations in their number caused large differences in the injection volume, that is, the internal pressure of the can at the sealed ridge. . This tendency was especially strong in cans with small capacity. As a result of research on adding liquefied gas with little variation, the present inventors found that
The present invention was developed by focusing on the fact that liquefied gas should be allowed to flow down continuously in the form of a thin thread-like line. This is a liquefied inert gas flowing device characterized in that a filterable receiver of A is provided and the liquefied inert gas is produced and flowed down from the lower part of the filterable receiver.

In this fIA, the needle valve is located at the bottom of the container.
Although it is preferable to provide the filter on the @ side of the container in relation to the filterable receiver described later. Since the temperature of the liquefied gas itself is low, extreme cold resistance is required for the needle valve and its regulator. Therefore, the needle pulp is adjusted by the spring.
It is preferable to open/close the valve or control the flow rate by pulling the spring 7'j rather than pushing it down from the outside of the container. The liquefied β gas flowing out from the needle pulp immediately enters the VC filtration receiver.

The shape of the filterable receptacle may be a cylindrical one with a bottom and a gently rounded bottom. Depending on the desired view, a protrusion for guiding liquefied gas may be provided at the tip of the bottom surface.

It is preferable that the inside of the filterable receiver be isolated from the outside air and maintained at the same pressure as the inside of the liquefied gas reactor to facilitate production.

The filtration receptacle referred to herein may be made of a material such as sintered metal, unglazed ceramics, synthetic zeolite, glass, or plastic casing, and has a filtration size of 30 μ to 200 μ. The sintered metal is preferably made of stainless steel, but other metals or alloys may be used.

By doing this, the liquefied gas flows out from the container and flows down continuously in the form of a thin thread.

Further, the difference in flow rate between the valves is absorbed while the flow passes through the wall of the filterable container, and the flow rate is always constant. On the other hand, since the soft wire is continuously conveyed on a conveyor with almost no gaps, even if the flowing solute gas flows down continuously in the form of a thread, it is poured into the soft wire with almost no waste. Of course, if the conveyor stops for some reason, it can be automated to immediately close the needle valve and divert the thread-like flow of liquefied gas elsewhere. Furthermore, the flow rate of the liquefied gas varies depending on the size of the can, the temperature of the contents, the speed of the conveyor, etc., and the flow rate may be adjusted accordingly.

□゛・1. As described above, in the present invention, the liquefied gas is made into a thin thread and is gently injected into the can through the filterable receiver, so there is less shock during injection compared to injection in the form of small droplets. There are few. Therefore, compared to conventional small droplet injection, there is less scattering and evaporation of liquefied gas due to shock during injection, and since it can be injected constantly, there is almost no variation in the injection amount, which is an excellent effect. It has the following.

Next, an example of the apparatus of the present invention will be explained with reference to the drawings. FIG. 1 is a central longitudinal cross-sectional view of the μ-less device, and is an enlarged central longitudinal cross-sectional view of the 111th part of the second rJ. 1 is the container body, 2 is the outer cylinder for cold storage, 3 is the storage cylinder, 4 is the inner pallet 7 of the needle valve.
', 5U (- seat valve, 6 is a filterable receiver made of sintered gold, 7 is a liquefied gas flow path, 8 is a shaft, 9 is a support frame, IO is a spring, 11 is a fixed spring support frame, 12 1 is a movable spring support frame, 13 is a vertical drive rod of shaft 8, and 14 is 1
3 support frame, 15 liquefied gas channel, 16.17 support frame for sintered metal receiver 6, 18 cold insulation outer cylinder, 19Fi liquefied gas flow outlet, 20 drive part of drive rod 13, 21 is a liquefied gas supply, supply pipe 5.22 is a liquid level sensor, and 23 is a liquefied gas supply pipe valve.

The inner valve 4 is integral with a shaft 8 to which a movable spring support frame 12 is attached. An upward force is always applied to the shaft 8 by the spring 104C. This shaft 8 is at the position of the vertical drive rod 13! Its position is determined by ft. Therefore, the relative positions of the inch valve 4 and the seat valve 5 are also determined, and a certain amount of liquefied gas enters the filterable receiver. The liquefied gas that has entered the filterable receiver 6 is rectified and passed through the liquefied gas outlet 19.
Flows down like a thread. The flowing liquefied gas is injected into the soft wire.

FIG. 3 is a partially cutaway perspective view showing the mode of use of this device, in which 24ij is the flow of liquefied gas, 25 is a soft wire, and 26F is a flow of liquefied gas.
i The upper cover of this device, 27 is the sensor lead part.

[Brief explanation of the drawing]

FIG. 1 is a central vertical cross-sectional view of the device according to the present invention, FIG. 2 is an enlarged vertical cross-sectional view of the main part thereof, and FIG. 3 is a partially cutaway perspective view showing the mode of use of the device. l is a liquefied gas container, 4
TI needle valve inner valve, 5fl needle valve seat valve, 6ij filtration receiver. Applicant Sun) IJ-Co., Ltd. Agent Tsuki 1 Toshio Taki Figure 1 Figure 2 Q 515- Figure U

Claims (1)

[Claims] The liquefied inert gas container 6 is provided with a filterable receiver for the needle pulp and the liquefied inert gas taken out from the valve, and the liquefied inviscid gas is caused to flow down once from the lower part of the filterable receiver. Liquefied inert gas flow device 0