JPS62216660A - Flow nozzle device - Google Patents

Abstract

PURPOSE:To relax impact force at a time for collision of the contents incorporated in a can without providing a pressure erasing nozzle by mutually changing the direction of flowed liquid stream to the reverse direction by means of a funnel and a change-velocity nozzle. CONSTITUTION:In a flow nozzle device wherein liquid such as liquefied inert gas is allowed to flow into a vessel such as a canning can and packed, vertical flowed liquid stream is received by an inner peripheral wall of a funnel hole 4 and deviated from the vertical direction and allowed to flow along the wall surface and the flow velocity is stalled. Thereafter when this deflected liquid flow is allowed to flow so that it is caused to collide against the wall surface of a nozzle hole 7 of a change-direction nozzle 2, furthermore flow velocity is stalled and velocity component of the same direction as the advancing direction of the vessel is given and liquid flow is allowed to flow. In such a way, impact force at a time for collision of the contents incorporated in the can is relaxed and scattering of liquefied gas is prevented without providing a pressure erasing nozzle.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drop-down nozzle device for filling containers such as cans with liquid such as liquefied inert gas.

Conventional Technology Conventionally, in order to compensate for the lack of strength of cans made of thin materials, or to prevent the contents from deteriorating, liquefied inert gas such as liquid nitrogen (hereinafter referred to as IK liquefied gas) such as liquid nitrogen was used just before tightening the can lid. The liquefied gas addition device used for this is installed at the bottom of a liquefied gas storage tank that is pressurized or communicates with the atmosphere. The liquefied gas is caused to flow down continuously or intermittently through the nozzle,
The lower part of the liquefied gas addition device is added in a fixed amount into cans that are continuously conveyed by a conveyor. Recently, in order to add a fixed amount of liquefied gas into the can, a valve that can change the opening amount has been adopted, and the opening amount is controlled according to the conveyor speed to allow the liquefied gas to flow down at a predetermined flow rate and flow rate. ing.

However, since the liquefied gas is flowing down vertically into the can while it is moving, the impact when it collides with the contents of the can is large, and the impact causes the liquefied gas to scatter and evaporate or fly out of the can. This is not only a waste of liquefied gas, but also problems such as a lack of quantitative supply and the inability to obtain a predetermined internal pressure. This phenomenon becomes more pronounced as the flow rate and flow rate of the liquefied gas flowing down from the flow nozzle increases.As a measure to eliminate such a phenomenon, conventionally, a porous pressure-eliminating nozzle has been installed at the lower part of the metered flow nozzle. The liquefied gas flowing down from the quantitative outflow nozzle is temporarily stored and the flow pressure is deenergized.
No. 1759), or one in which the nozzle hole is inclined so that the gas flowing down from the nozzle has a velocity component in the traveling direction of the can (Japanese Patent Application Laid-Open No. 193222/1983) has been proposed.

Problems to be Solved by the Invention However, in recent years, the speed of canning production lines has increased, and in order to proportionately increase the amount of liquefied gas flowing down from the nozzle per unit of time, the flowing mass or the flowing speed has increased. . As a result, the impact force upon impact on the contents of the can increases, and the conventional means described above are no longer able to sufficiently prevent the contents from scattering.

As a solution to the above problem, the present inventor provided a pressure elimination nozzle made of a porous material below the flow valve, and further provided a flow direction changer that deflects the liquid gas flow in the advancing direction of the container. We proposed one with a nozzle (
Patent application No. 60-282981). The device of this application can prevent liquefied gas from scattering by alleviating the impact force when it collides with the contents of the can, even if the flow rate of liquefied gas per unit time increases due to the line speeding up. The liquid separation is sufficient and a certain amount of liquefied gas can be stably added, resulting in considerable effects. However, since this device allows the flow to flow down through a pressure-eliminating nozzle made of porous material, the valve opening degree VC! There was a problem that the responsiveness of changing the flow rate using pG was slightly inferior.The present invention was made in order to further improve the invention of the prior application and solve the apex of the prior art. The purpose is to reduce the impact force upon collision with the contents of the can and prevent the scattering of liquefied gas without having to provide a pressure elimination nozzle as described above, and to achieve sufficient gas-liquid separation. It is possible to stably add a certain amount of liquefied gas even when the canning production line is at high speed, and the flow rate (
An object of the present invention is to provide a downstream nozzle that can obtain five answers.

Means for Solving the Problems Hereinafter, the configuration of the present invention will be explained based on the drawings corresponding to the first embodiment.

The downflow nozzle device of the present invention is a downflow nozzle device for deenergizing a vertical downflowing liquid flow from a liquid storage device and flowing it down into a container, the downflow nozzle device receiving the vertical downflowing liquid flow at the inner circumferential wall of the funnel hole 4. A funnel 1 that deflects the liquid from the vertical direction, and a direction changing nozzle 2 that changes the direction of the deflected liquid flow so that it has a velocity component in the same direction as the traveling direction of the container. The liquid flowing down from the working liquid storage device with its flow rate controlled by the flow down valve hits the inner peripheral wall surface of the funnel 1, deflects the flow direction, and flows along the wall surface, with the flow velocity being deenergized and flowing through the direction changing nozzle 2. It flows down so as to hit the wall surface of the nozzle hole 7. The liquid flowing down from the funnel 1 further impinges on the wall of the nozzle hole 7 to have its flow velocity reduced, flows down along the nozzle hole 7 of the pressure-eliminating nozzle 2, and is added into the container. At this time, due to the inclination of the nozzle hole 7, a component in the traveling direction of the container is imparted, and the relative speed difference with respect to the container being transported can be reduced. This reduces the impact force when the liquid flow collides with the surface of the contents of the container, and prevents the liquid from scattering. Also,
Since the liquid flow from the downstream valve 3 is directly caused to flow down, it is possible to immediately respond to the flow rate side (toward) of the downstream valve.

In addition, by enlarging the nozzle hole inlet of the direction changing nozzle and providing a chamber, the flow velocity can be further reduced. It is possible to reduce the impact by reducing the impact.

Example Embodiments of the present invention will be described below based on the drawings.

The downflow nozzle device of the present invention has a funnel 1 as shown in FIG.
and a direction changing nozzle 2. Funnel 1 is
The second valve receives the vertical liquefied gas flow from the flow down valve 3 on its inner wall surface and imparts a velocity component in the direction opposite to the traveling direction A of the container (not shown) to which the liquefied gas is added. As shown in FIG. 3, the funnel hole 4 is eccentrically bored towards the rear in the direction of travel A.

The direction conversion nozzle 2 further converts the liquefied gas flow from the funnel 1 into the opposite direction, so that the nozzle hole 7 is connected to the container so that it flows downward with a velocity component in the same direction as the traveling direction A of the container. It is provided so as to be inclined in the direction of travel. The flow outlet 8 is enlarged to a slightly larger size as shown in the figure.

The shape of the nozzle hole 7 may be round, quarter-shaped, diamond-shaped, triangular, etc., but if it is diamond-shaped, the convergence of the flowing liquid flow can be better maintained.

However, the direction changing nozzle 2 is provided with a heater 9 to heat it in order to prevent frosting and to improve liquid drainage when the downstream valve 3 is closed. Note that the 10/fi hole is provided with a screw for fixing the downstream valve device to the liquefied gas tank machine frame or the like.

As shown in FIG. 1, the funnel 1 and the direction changing nozzle 2 configured as described above are assembled together using appropriate fixing means such as screws so that the funnel hole 4 and the nozzle hole 7 communicate with each other. In this embodiment, the funnel 1 is attached and fixed to the direction change nozzle 2, but the funnel 1 and the direction change nozzle 2 may be separated and separately attached to the tank machine frame.

The operation of adding liquefied gas into a container being conveyed downward by the flow nozzle device having the above configuration will be explained below.The flow rate of the liquefied gas is controlled by the flow valve 3 and flows down through the funnel hole of the funnel 1. It hits the inner wall surface, is given a velocity component in the direction opposite to the container traveling direction A along the wall surface, deenergizes the flow velocity, and flows down so as to hit the wall surface of the nozzle hole 7 of the direction changing nozzle 2. The liquefied gas flowing down from the funnel 1 further hits the oblong surface of the nozzle hole 7 to have its flow velocity deenergized, flows down along the nozzle hole 7 of the direction changing nozzle 2, and is added into each vessel. At this time, since each flow direction component is given by the nozzle hole 70 order, the velocity component in the container traveling direction when the content liquid level of the container is reached is gradually lost as the container advances, but the content liquid The impact during surface collisions is alleviated and liquid scattering can be prevented. In particular, in this embodiment, the direction of the vertical downward liquid flow from the downward flow valve is changed twice in a dogleg shape as shown in Fig. 1, so that the flow velocity is further deenergized and the pressure deenergized nozzle is Even if it is not provided, it can be added in a container to reduce the impact upon collision. and,
Since there is no pressure deenergizing nozzle installed in the middle, responsiveness to opening and closing of the downstream valve and changes in flow rate is good.

Furthermore, the vaporized gas vaporized in the flowing funnel and the direction changing nozzle escapes to the atmosphere through the nozzle hole 7. Therefore, gas-liquid separation is performed well, and the vaporized gas does not exist in the form of bubbles in the liquid flow, and flows down in a stable state. Moreover, the enlarged downstream opening 8 at the tip of the nozzle hole 7 of the downstream direction conversion nozzle 2 shields the periphery of the liquid flow in which the liquefied gas flows down, thereby preventing the liquefied gas from evaporating. In addition, in FIG. 1, broken line arrows indicate the flow of vaporized gas.

Further, the flow direction conversion nozzle 2 is heated to approximately room temperature by the heater 9 to prevent frost from adhering to the area around the flow outlet 8.

FIG. 4.5 each shows an embodiment of the pond of the flow direction conversion nozzle.

The flow direction converting nozzle 12.15 shown in FIG. 4.5 is provided with a chamber 14.15 as shown by enlarging the inlet portion of the nozzle hole 13.16. Thereby, the liquid flows from the funnel 1, flows down along the inner circumferential wall and the bottom surface of the chamber 14.15, is reversed at the inner circumferential wall, and is diffused at the bottom surface, which has the effect of further suppressing the flow rate. Liquid separation is also performed more effectively. Furthermore, by providing a chamber, as shown in FIG.
5 to a plurality of nozzle holes 16, 16... can be provided to distribute to a plurality of downstream streams. As a result, the amount of water flowing down from each nozzle hole can be reduced, so that the scattering prevention effect can be further enhanced.

In addition, if a net-like material, for example, a wire mesh of 30 to 50 mesh, is placed at a position slightly away from the electric pattern or the bottom of the chamber 14, 15, the liquid flow will be further weakened and the quenching effect will be greatly improved. can be done. At the same time, even if the amount of liquid from the flow valve is changed from zero to the maximum, it can be distributed almost equally to each nozzle hole by the net-like body.

Each of the embodiments has been described above with respect to the case where liquefied gas is flowed down into a container, but it goes without saying that the present invention is applicable not only to liquefied gas but also as a flow down nozzle for general liquids. As is clear from the explanation, it is possible to change the direction of the 5-press liquid flow in opposite directions using a funnel and a speed conversion nozzle, and to further reduce the flow velocity without providing a pressure elimination nozzle◇Also. , since the flowing liquid flow is given a velocity component in the container transport direction by the direction changing nozzle, the velocity component in the container transport direction when each liquid level in the container is reached is lost as the container advances, and the velocity component when the liquid surface collides with the container is lost as the container advances. Furthermore, since there is no pressure elimination nozzle in between, the responsiveness of the flowing liquid flow to opening/closing of the flowing valve or changing the opening amount is good.

Then, the vaporized gas that is vaporized on the way can escape well, and the vaporized gas is not mixed in the liquid flow, so that the liquefied gas flows down in a stable state. The evaporative gas also shields the periphery of the liquid flow to prevent the liquefied gas from vaporizing.

As described above, according to the present invention, the scattering of liquefied gas is reduced and the liquefied gas is caused to flow down into the container with good response compared to the conventional method, so that the accuracy of quantitative addition can be dramatically improved.

[Brief explanation of drawings]

The drawings show an embodiment of the downstream nozzle device of the present invention, and FIG. 1 is a side sectional view thereof, FIG. 2 is a top view of the funnel, FIG. 3 is a side sectional view, and FIG. 4 is a direction view. Figure 5 is a side sectional view of a basin embodiment of the diverting nozzle; Figure 5 is a side sectional view of a basin embodiment of the diverting nozzle. : Funnel hole 7.13.16: Nozzle hole 1
4.15: Chamber patent applicant: Toyo IJJ Kazumi Shiki Company applicant's agent: Fumi Sato (and 2 others)
Name) Figure 1 Figure 4 #E 2 Figure 3 Figure 5

Claims (1)

[Scope of Claims] 1) A downward nozzle device for deenergizing a vertical downward liquid flow from a liquid storage device and flowing it down into a container, wherein the vertical downward liquid flow is received by an inner circumferential wall of a funnel hole and vertically A downward nozzle device comprising: a funnel that deflects the liquid flow; and a direction conversion nozzle that changes the direction of the deflected liquid flow so that it has a velocity component in the same direction as the traveling direction of the container. 2) The downstream nozzle device according to claim 1, wherein the upper opening of the direction changing nozzle is enlarged to form a chamber. 3) The downstream nozzle device according to claim 2, wherein a plurality of nozzle holes are provided from the chamber. 4) The downstream nozzle device according to claim 2 or 3, wherein a net-like body is laid within the chamber.