RU205886U1 - Pressure relief cap - Google Patents

Abstract

The utility model relates to auxiliary structures of containers for filling, storing and transporting beverages under pressure, in particular containers made of polyethylene terephthalate, metal kegs designed to relieve excess pressure in the container after its use. The lid for pressure relief contains a body in the form of a body of revolution of a concave stepped shape, connected by means of a flexible bridge to an annular element placed on the neck of the container, the body being made of a stepped shape and containing an annular fixing protrusion with a slot. EFFECT: provided the possibility of separating the fitting and the cover to relieve pressure for their subsequent use.

Description

The utility model relates to auxiliary structures of containers for bottling, storage and transportation of beverages under pressure, in particular, containers made of polyethylene terephthalate (hereinafter PET keg), designed to relieve excess pressure in the container after its use.

PET kegs fitted with fittings are used for storing and dispensing beverages such as beer. These fittings have multiple channels to allow the passage of liquid and gas. During filling, when the PET keg is normally upside down, the beverage is introduced through the first port of the fitting while the gas displaced from the keg exits through the second port. During filling, gas (nitrogen or carbon dioxide) is introduced into the PET keg through the first channel in order to displace the beverage from the PET keg through the second channel. The beverage is dispensed with the help of a filling head connected to the valve structure onto the spring-loaded fitting elements with the subsequent opening of the channels, one of which is intended for supplying an inert gas under excess pressure, and the second channel for dispensing the beverage displaced by the gas. The sealing element of the fitting serves to maintain the created excess pressure inside the PET keg when removing (dismantling) the filling head. As a rule, in the case of filling and storing beer, the overpressure is approximately 2.5 - 3.0 bar. The indicated pressure is the working pressure of the PET keg. At the same time, the PET keg withstands a pressure of about 7-8 bar.

At the end of the bottling of the drink, the container is still under excess pressure, which prevents its further (repeated) use, and also causes a certain danger during storage and transportation of such kegs for people in the immediate vicinity of the PET keg due to a possible rupture of the container. Therefore, after use, the pressure in the container must be released.

A known plastic container, for example, a PET keg for drinks with shut-off valves with a seal (patent for invention of the Russian Federation No. 2466085, date of convention priority October 29, 2008, IPC B67D 1/08), in which the shut-off valves and / or seal and, therefore, The pinheads are designed so that after the opening process, the subsequent automatic closing process is carried out or is almost incomplete, since during this and the subsequent automatic closing process, an unclosed through hole remains. This through hole allows pressure relief inside the vessel. As a result, no overpressure can build up inside the container and thus the potential risk of bursting the container is eliminated. In this case, the shut-off valve contains a stop with a predetermined break point for a spring-loaded seal. The seal has a predetermined rupture location or is designed to deform during the closing process to form a through hole.

Known cover for a sealed container (RF patent No. 2555137, publ. 10.07.2015), which contains a housing, a valve element made with the ability to move relative to the housing between the closed and open positions; and a locking mechanism configured to hold the valve member in an open position; the locking mechanism has first and second parts, where the first part can be moved by the action of the valve element and contains a locking element that can be engaged with a counterpart on the body to keep the valve element in the open position; and the second part can be moved by the action of the first part when the valve member is moved from a closed position to an open position; wherein, when the valve member returns from the open position to the closed position, the first part can move relative to the second part; and the specified relative movement of the first and second parts provides engagement of the locking element with the counterpart on the housing to hold the valve element when it returns to the open position (taken as a prototype).

Such solutions do not allow the kegs to be reused many times, in addition, if during the filling process it becomes necessary to replace an incompletely filled keg, then such a keg cannot be temporarily set aside by removing it from the filling equipment, because fittings of this type are not tight when the filling head is removed.

Known tool for relieving pressure (https://www.youtube.com/watch?v=rY63I-JzyVk&ab_channel=mrplau1), made in the form of a lever with two protrusions at one end. In this case, for the purpose of relieving pressure, the lever is placed in such a way that the said protrusions grip the wall of the fitting, while the first extreme protrusion is located on the outside of the fitting, and the second from the side of the central through hole of the fitting and when pressing on the opposite side of the lever, the second protrusion presses the valve of the fitting and thus opens the pressure relief channel.

The disadvantage of this solution is the need to apply force on the lever throughout the entire process of bleeding pressure, as well as to control the process itself and, in addition, after the pressure is released and the pressure on the lever is released, pressure can again appear in the keg as a result of gas escaping from the rest of the drink or heating. keg from ambient temperature.

Also known is a pressure relief tool made in the form of a cover installed on a fitting and having protrusions on the inner side, designed to fix the cover in the pressed state by pressing the cover by hand and moving the fitting valve downwards and, accordingly, to open the pressure relief channel. After installation on the fitting and actuation of this tool, it is rigidly fixed to the fitting and further detachment from the fitting is not provided, since the tool is intended for disposable containers and is disposed of together with an empty container. (Https://www.petainer.com/solutions/ petainer-kegs-hybrid /). It is very difficult to remove such a cover without damage, and it is impossible without a special tool.

The technical problem of the claimed utility model is to create a simple pressure relief tool for reusable kegs with S and D fittings.

EFFECT: provided the possibility of separating the fitting and the cover to relieve pressure for their subsequent use.

The technical result is achieved in that the pressure relief cover comprises a body in the form of a body of revolution of a concave stepped shape, connected by means of a flexible bridge with an annular element placed on the neck of the container, the body being made of a stepped shape and containing an annular locking protrusion with a slot.

The claimed utility model is illustrated by the following drawings:

Fig. 1 is a general view of the pressure relief cover from above;

Fig. 2 is a general view of the pressure relief cover from below;

3 is an assembled view of an S-type fitting with a pressure relief cap.

The pressure relief cover, according to the claimed utility model, is designed to relieve pressure in tanks equipped with S- or D-type fittings.

In general, the pressure relief cover (1) consists of two parts: a body (2) made in the form of a body of revolution of a concave stepped shape, connected by means of a flexible bridge (3) to an annular element (4), provided with locking petals on the inside. The annular element (4) serves to accommodate the lid (1) on the neck of the container (Fig. 1).

The body (2) consists of two annular steps, the lower one of which is made blind from the lower end, and the upper one is made with an axial hole. An annular support protrusion (5) is made on the upper step from the upper end, and an annular fixing protrusion (6) is made in the lower part. In the section of the annular surface, the protrusion (6) is made with a slot (7) located on the opposite side from the annular element (4) (Fig. 2).

The width of the slot (7) is slightly larger than the width of the projections (9) made in the body of the fitting and designed to fix the pouring head. In this case, the protrusions (9) have an additional function of fixing the pressure relief cover (1).

Description of device operation

After the plastic container is emptied, it is necessary to release the excess pressure in the container for its further storage, disposal, transportation and reuse. To do this, the pressure relief cap (1) is placed in the upper opening of the fitting body (8) and the palm surface is pressed against the annular support protrusion (5) (see Fig. 3), while the annular locking protrusion (6) engages with the protrusion ( 9) of the fitting body (8), and the lower end of the cover (1) presses on the collar (10), compresses the spring (11) and, thus, allows the collar (10) to move downward. As a result, the tightness of the fitting is broken, the channel between the fitting body (8) and the collar (10) opens, and the excess pressure is released (Fig. 3).

The annular locking projection (6) secures the lid (1) in the pressed state, thus, the user only needs to press the lid (1) once.

After the end of the pressure relief process, if it is necessary to reuse, the cover (1) can be easily removed from the fitting body (8) by turning around the axis until the slot (7) in the cover aligns with the projection (9) in the fitting body (8), in this case, under the action of the spring (11), the cover (1) easily rebounds and is removed from the fitting body (8). In this case, the lid is not damaged and remains hanging on the neck of the container, ready for reuse. Since the location of the slot is known, it is sufficient for reuse of the cover, without aligning the slot and the protrusion, to snap the cover again by pushing it with your hand from above.

Thus, the pressure relief cap according to the claimed utility model can be reused in conjunction with a container and a fitting.

Claims (3)

1. A cover for pressure relief, containing a body in the form of a body of revolution of a concave stepped shape, connected by means of a flexible bridge with an annular element placed on the neck of the container, while the body is made of a stepped shape and contains an annular locking protrusion, characterized in that the annular locking protrusion made with a slot. 2. A pressure relief cover according to claim 1, characterized in that the annular element is provided with retaining tabs. 3. A pressure relief cap according to claim 1, wherein the width of the slot is greater than the width of the projection provided on the body of the fitting.

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