JPS60158088A - Filling valve for counter pressure filling of can - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to an improved valve for use in connection with filling cans with carbonated beverages. More particularly, the invention provides that the one stop between the valve and the can required for filling is not directly at the end of the can, but rather along the inner periphery of the open end of the can;
The present invention relates to a filling valve for use in filling carbonated beverages into a container, which has a minimal tendency to load on the end of the can, i.e. to result in the can being destroyed.

(Prior Art and Problems) The continuous economic pressure in the city and IK for cans for storing carbonated beverages, etc., has led to further development of beverage cans. In particular, the currently manufactured 1-1111 wall is wider than before (therefore, its strength is inferior.Difficulties arise especially when filling cans with reverse pressure, and therefore, the filling force method is such that the liquid coal saturated phase fills the can. The can is first filled against counterpressure gas and then filled with carbonated liquid to prevent escape.

This suggests that the valve should be leak-tight against the back pressure filling valve.

This is usually the open end of A, and is simply pressed to engage the circular elastic leakage member. 36k
y). Therefore, some percentage of the can will normally collapse. This proportion is expected to increase as the can structure tends to become lighter and lighter. Inherent end loads also tend to strain the can flanges, which prevents leak-tight sealing of the can when the can ends are later attached.

Therefore, there is a need for a back pressure replenishment valve technology that sufficiently seals the leak to prevent back pressure gas and carbonated liquid from escaping, and that does not require a sufficient end load on the can when sealing the leak.

As is well known in the art, after filling the can with carbonated liquid, the head space above the can, ie, the portion of the ant that is not filled with liquid, is filled with compressed gas. To avoid excessive foaming and loss of product, the compressed gas must be vented to the atmosphere in a so-called leak operation before the can is removed from the valve.

In the valve shown in co-pending application No. 325.289, this problem is solved by relative movement of the can with respect to the valve before stopping the leakage therein, which increases the head space sufficiently to prevent leakage valves etc. is not necessary.

retaining the shape of the invention shown in this co-pending application while providing a leak seal without imposing excessive end loads between the valve and the can, and further reducing the number of cans destroyed during the canning operation. It is an object of the present invention to reduce the

OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide an improved valve for filling cans with carbonated beverages in which damage or destruction of the cans is reduced.

It is a further object of the invention that the seal is provided between the valve and the open end of the inner wall of the can, at which end there is no end load of the can to form the seal. An object of the present invention is to provide an improved valve for filling carbonated liquid.

It is a further object of the present invention to provide a valve for filling a can with carbonated liquid that does not require a leak valve to create a leak in the head space of the can after filling is completed.

SUMMARY OF THE INVENTION The need for the above-described technique and the object of the present invention is to provide a seal between the valve and the end to be filled with carbonated beverage on the inner surface of the open end of the can. and an O-ring disposed around the valve member.

In the preferred embodiment, two concentric axially spaced O-rings are used; one is slightly smaller than the inside diameter of the can and serves as a guide for the can, and the can is subjected to small forces. It is leak-tight against a slightly larger O-ring that is spaced axially along the valve body away from the O-ring, so that when the can is engaged with the low-force O-ring, the can is guided first. 0
Pass through the ring and then form the seal O-ring and seal. Cans are currently manufactured according to industry standards with a cylindrical neck portion of constant diameter at their open end. The present invention takes advantage of this fact by providing a valve having a leak-tight O-ring in mutual contact with the inside surface of the neck portion. Due to the fact that the cylindrical neck portion extends a certain distance axially along the can, the can can be moved that distance relative to the valve after filling without rupturing the seal. The head volume thus expands after filling, which eliminates the need for leakage valves and the like.

(Example) Fig. 1 shows a cross-sectional view according to the present invention. Valve 10 is shown in a tank 12 filled with liquid to be canned, as is conventional; above the liquid is pressurized gas, typically 40 to 45 bonds 7 square inches. (2,81~3.1
There are 5 yu-) of oxygen dioxide or carbon dioxide. Valve 10 is operated by a conventional cam member 14. The construction and operation of the cams and valves are as generally described in U.S. Pat. No. 4,089,353, commonly issued to Antoneille. As will be seen in more detail below in connection with Figures 2 to 4, the valve 10 has two relatively movable valve members 16,18. When the valve member 18 is actuated by the cam 14, the counterpressure gas descends through the center of the valve, flows out from around the countervalve ball field, and into the can η as shown by the arrow Cp. Compression When the second valve member 16 is actuated by the actuation of the spring 42, the leakage seal formed between the elastic member and the main body 10a of the valve 10 is released, and the liquid flows from around the valve member as indicated by the arrow LIQ. It flows downward into the can. At the same time, counterpressure gas flows back through the center of the valve.

When the liquid level lifts the floating ball prisoner relative to the ball check valve housing, a leak stop is formed between the ball magazine and the elastic leak stop member blade, and any further back pressure gas is expelled. and prevent liquid from flowing into the can. As shown, the ball check valve housing is threadedly connected to the body of the valve 10. Spacer 31 inserted between
The number of is varied to adjust the relative volume between the head walls remaining in the can after the ball check valve stops filling. The residual volume is selected such that as the can begins to move away from the valve 10 after being filled, the headspace volume of the can increases proportionately so that the gas pressure in the headspace decreases to or near atmospheric pressure. do. Since the counterpressure gas is typically 45 bonds/square inch (3,15 kyaI), this requires an increase of 3=1 in the volume between the headwalls; clearly if the can packing is more When implemented at high heights, this volume is typically increased to compensate for the lower atmospheric pressure at a height of 2°.

Spacers are also used to determine the height of manufactured items in the area.

As shown in Figure 1 and Figures 2 through 4,
It can be seen that two O-ring seals 32 are provided. These are of slightly different diameters: the O-ring U near the end of the valve is smaller, and as the can is raised into engagement by a conventional glue lid (not shown), the can is centered with the valve. It acts as a guide to match.

The other O-ring 32 is the generally cylindrical neck portion 2 of the can.
It is used to leak-tight the valve to the can by tightly fitting into 2a. The industrial standard that determines the shape of the can is that the cylindrical neck part Z2a is at least about o, in most industrial standard cans.
The length is stipulated to be approximately 4.5 mm. This cylindrical surface allows the valve to move relative to the can without breaking the seal formed there by the high force O-ring 32, which causes the head space to expand after filling. The leak valve 7 equilibrates the counterpressure gas with respect to atmospheric pressure.

As mentioned above, the diameters of the two O-rings and the ingredients are slightly different.

The O-rings located towards the lower end of the valve according to this invention are slightly smaller, typically 2 mm smaller in diameter than the larger force O-rings 32.

Thus, when the can is raised to contact the valve for filling, the smaller zero/gauge system provides an internal function to ensure that the can flange is in the correct position and concentric with the valve. Make it. The low force O-ring also prevents contact between the inner surface of the can and the metal of the valve body, so that the inner sealing surface is not scratched or damaged during filling. In the preferred embodiment, the O-ring is a standard component that fits into a groove in the valve body sized as specified by the O-ring manufacturer to ensure a leak-tight seal. The exact size of the O-ring chosen will vary depending on the can being filled.

Figure 1 shows the flange of the can! I! I! Additionally, additional elastic members are shown. However, according to the present invention, this member is not fitted to serve as a proper gas-tight seal between the valve 10 and the can, and its sealing function is performed by an O-ring. However, it should instead be considered that the members act merely as a buffer or travel stop to ensure that the O-ring 32 is in contact with the cylindrical neck portion 22a of the can n.

Figures 2 to 4 show the stages of filling a can with a valve according to the invention. Figure 2 shows the can raised and engaged with the valve of the present invention; as shown, the check valve ball row rests downwardly and the valve member is closed. As the screw moves upwards, the can first encounters the smaller O-ring 34;
The O-ring helps guide the opening can into the larger leak-tight O-ring 32 until the can reaches the position shown in Figure 2. Subsequently, when the upper valve member 18 is opened by the cam 14 (FIG. IF1), the counterpressure gas flows downward through the center of the tube and around the check valve ball row into the can as shown by the arrow cp in FIG. The flow is as shown in . Subsequently, the cam raises the second valve member base by the spring 42 (Fig. 1) as shown in Fig. 3, and the liquid follows the many holes in the valve body 10a into the can. It flows as shown by arrow LIQ.

The counterpressure gas exits the can and flows upward as shown by arrow CP. When the floating ball row of the check valve finally moves upward toward the leakage prevention member, the height of the liquid reaches 3.
The point shown in the figure is reached, stopping the flow of counterpressure gas up the center of the valve, and the valve then prevents further liquid from entering the can.

Those skilled in the art will appreciate that when gas and liquid are in the same tank, as shown in Figure 1, their pressures are equal and therefore the flow of liquid will stop when gas no longer escapes from the can. Will.

This method of stopping the flow of liquid is aggressive and precise, as discussed in Antony Gourd's Patent No. 4.0B9.35B mentioned above, and is capable of stopping the fluid flow of liquid during the packing operation. Those skilled in the art will recognize that this differs from certain conventional methods, such as using the surface tension of a liquid in conjunction with a capillary screen placed in a liquid flow path.

After filling, a conventional lid (not shown) drops the can away from the valve. In Figure 4, the can moves from the valve, while the neck of the can and QIJ
This indicates that the leak-tight seal between the At this point the upper valve member 18 is closed by the cam member 14 and the volume of the can head space increases as the spear 4 moves downwardly away from the valve, as shown in FIG. This causes the compressed gas sealed above the liquid in the valve lo to expand to a pressure equal to atmospheric pressure, causing an excess of liquid when the can moves and completely disengages from the valve. It is prepared to prevent foaming and to be capped in a conventional manner. As shown in Figure 4, a leak stopper is also reinstalled on the valve body (by cam 14 in Figure 1) to prevent escape when the can is removed from the valve.

(Effects of the Invention) A new valve for filling a container with carbonated liquid or the like under back pressure has been described, and in this valve, the leakage prevention between the valve and the can, which is necessary to prevent excessive back pressure filling of the can, is provided by the valve. The cylindrical inner surface of the dragon body avoids the high end loads associated with leak sealing, thereby minimizing can collapse and flange damage, thereby reducing can sealing. Those skilled in the art will recognize that this improves operational reliability.

While preferred embodiments of the invention have been described, the invention should not be construed as limited thereto, but rather in accordance with the claims appended hereto.

[Brief explanation of the drawing]

The invention will be better understood with reference to the accompanying drawings, in which: Figure 1 is a cross-sectional view of the valve; and Figures 2 to 4 show the end of the valve at various stages during the Akebono filling operation. Show part. 10... Valve 12... Tank 14... Cam member 16... Second valve member 18... First valve member assistant... Check valve housing 4... Can...・Ball 32, Literary...0 linog 42... Compression spring 15, 3 f, 4 Procedural amendment 1972/July 7, Commissioner of the Japan Patent Office No. 1 w ga, 2, I pa γθ (Hiroshi) t's Lβ 9 female r light meme f 3, person making the correction 4, agent" Δ21

Claims (1)

Claims: 1. A filling valve for filling carbonated liquid under counterpressure into a can that is configured to have a generally cylindrical inner surface over at least part of its length near its open end. and a leak-tight device sized to fit into leak-tight engagement with the cylindrical inner surface of the can, thereby allowing the can to be filled without excessive end loading. A filling valve for filling a can with back pressure, characterized in that the can is effectively leak-tight with respect to the filling valve. 2 days ago! The filling valve for back pressure filling of a can according to claim 1, wherein the leakage prevention device is a QIJing device. 3. A can filling device for the filling of cans of the type having a generally cylindrical inner surface located near the open end of the can; a leak sealing device having an elliptical sealing surface; a device for moving the can into a filling position in leak-tight engagement with the leak-tight device; a first valve device for supplying gas to the can creating a back pressure; a second valve device for filling the can with carbonated liquid; a device for stopping the flow of the liquid into the can when the liquid in the zone reaches a predetermined level; a device for removing the can from the seal and valve device when the level is reached; a device for defining an internal volume of the head space of the can when filled to a predetermined level; and the device for sealing the valve against the cylindrical inner surface of the can; When the can is in the filling position and the can is leak-tight with respect to the valve, the head space volume increases sufficiently so that the gas pressure in the head space volume becomes equal to y atmospheric pressure. 2. A light-filling device, characterized in that it is positioned relative to said cylindrical surface so as to be movable a distance of . 4. The can filling device according to claim 3, wherein the leakage prevention device is an O-ring. 5 a second O-ring smaller than the O-ring providing a leak seal between the power supply and the valve, the second low-force O-ring spaced axially along the valve body; concentric with the high force O-ring, whereby the second O-ring serves as a guide for raising the can upwardly into engagement with the toothed high force O-ring; 5. The end light loading device according to claim 4, wherein the valve body provided with the two QIJ rings prevents damage to the cylindrical inner surface bait.