RU28353U1 - Tank for storing liquid and gaseous media under pressure - Google Patents

Description

2002130341

vrw "-"; r t.L ..,.,.: MPK-V65O1 / 00

Tank for storing liquid and gaseous media under

The utility model relates to the field of small containers, in particular, to containers made of polyethylene terephthalate for storing liquid and gaseous media under pressure, for example, construction mixtures or deodorants.

Known capacity for storing liquid or gaseous media under pressure, in particular building and assembly mixtures, containing a cylindrical body made by bending a metal sheet with a subsequent weld, the bottom and neck, hermetically connected to the cylindrical body. The neck has a landing whisk for fastening on it by seaming a metal cover with a pressure relief valve (see, for example, the prospectus of Lanico-Maschinenbau Otto Niemsch Gmbh, Germany, Aerosol Can Making Equipment, 1.98).

A disadvantage of the known capacity is its high cost, since it is made from sheet metal billets using sophisticated technology.

There is a known container containing a housing made of polyethylene terephthalate at the same time as the neck, in the upper part of the neck there is a landing girdle for tight fastening on it by seaming the metal cover with an exhaust valve (see RF patent N2140384, BS5D 1/103).

A disadvantage of the known capacity is that the fastening of the metal cover by the seaming method on the seat belt of the neck made of polyethylene terephthalate is not sufficiently reliable due to the low rigidity and strength of the polyethylene terephthalate. This disadvantage manifests itself especially when storing liquid or gaseous media in containers under pressure, for example, building and construction mixtures, when when the cover is broken, the medium stored under pressure in the tank almost completely expires from it.

The problem to which the utility model is directed is to create a container made of polyethylene terephthalate, which provides a reliable tight connection with the neck of a standard commercially available metal cap with an exhaust valve, preferably a seaming method.

pressure. a neck on which a metal cover is fixed by seaming

with an outlet clan, the tank, according to a utility model, is equipped with a means for attaching a metal cap with an outlet valve on the neck of polyethylene terephthalate, the specified tool is made in the form of a hollow cylinder with a thread on the inner surface for fastening on the neck, with an inner ring support flange located above the thread , and with an end landing flange for fastening a metal cover.

The presence of intermediate means for fastening the metal cover significantly increases the reliability of the tight fastening of the latter on the neck of the container made of polyethylene terephthalate, since it can be made of a material having greater rigidity and strength than polyethylene terephthalate, for example, of metal, and the tool itself is attached to the neck by threads, and already to its end landing flange made of metal, a metal cover with an exhaust valve is fastened by seaming. Thus, a significant increase in the reliability of tight sealing of the metal cover on the neck of the container made of polyethylene terephthalate is achieved, which makes it possible to use standard metal covers commercially available from the industry with a pressure release valve.

It is advisable that the inner annular support flange was provided with an elastic gasket.

The elastic gasket increases the tightness of the fastening means for fastening the cap with a neck.

It is desirable that the hollow cylinder in the lower part under the thread was made with an annular crimp band.

The presence of a crimping belt increases the reliability of fastening, since it eliminates spontaneous violation (up to disassembly) of the tightness of the connection with the neck of the means for attaching the cap to the neck during storage and operation of the container.

The proposed utility model is illustrated by drawings, where in FIG. 1 and FIG. 2 shows a container with various mounting options for the crimp girdle, in FIG. 3 means for fastening a metal cover with a push-release valve on the neck of the container.

The container contains a housing 1 made of polyethylene terephthalate (hereinafter referred to as PET) at the same time with a neck 2 having a thread 3. A method of manufacturing such a container involves the preliminary production of a finger-like, usually with a screw neck.

 V /

2 intermediate blanks in the form of the so-called PET preform, which

receive, for example, by injection on injection molding machines. Such one-piece blanks are universal and serve for the production of containers of various shapes and volumes. Capacities using a preform are made at elevated temperatures on special machines by blowing a pre-mold into a mold of a predetermined configuration pre-heated to the state of plasticity. The tank is equipped with a means for attaching a metal cover 4 with a push-release valve 5 on the neck 2.

The specified tool is a zero cylinder 6, on the inner surface of which a thread 7 is made for connection with the neck 2 through the thread 3. Above the thread 7 on the inner surface of the cylinder 6, an annular support flange 8 with an elastic gasket 9 is made to support the end of the neck 2. B the upper part of the cylinder 6 is filled with an end landing flange 10, preferably of a toroidal shape, for mounting a metal cover 4 with a push-release valve 5 on it. The cylinder 6 in the lower part has a crimping ring girdle 11.

After filling the container with a liquid or gaseous medium, for example, with the construction and assembly mixture, the container is closed (capped). To do this, a cylinder 6 is screwed onto the neck 2 by the thread 3 until the annular supporting flange 8 with the elastic gasket 9 lies on the end of the neck 2 with a force sufficient to ensure the tightness of their connection, after which the crimp ring crimp 11 around the neck 2 is crimped capacities. Compression of the crimping annular belt 11 completely eliminates the possibility of spontaneous loosening of the connection of the cylinder b with the neck 2 and the violation of the tightness of the container during storage and operation. Before the cylinder 6 is mounted on the neck 2 on its end landing flange 11 by means of a crimp (for example, by rolling), a metal cover 4 is fixed with a pressure release valve 5.

Considering that the means for fastening the metal cover on the neck of the container is made separately from the last one, it can be made of a stronger material compared to the container, for example, metal, which ensures reliable tight fastening of the metal cover 4 with the pressure release valve 5 on end landing flange 11 of the specified funds

Thus, the present utility model provides a reliable tight connection of metal caps with the necks of containers made of PET intended for storage of liquid or gaseous media under pressure.

o / JOJV /

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Claims (3)

1. A container for storing liquid and gaseous media under pressure, comprising a housing made of polyethylene terephthalate, made integral with a neck, on which a metal cover with an exhaust valve is fixed, characterized in that it is provided with means for attaching a metal cover to the neck, which is made in the form of a hollow a cylinder with a thread on the inner surface for mounting on the neck, with an inner annular supporting flange located above the thread, and with an end fitting flange for mounting the metal cover . 2. The tank according to claim 1, characterized in that the inner annular supporting flange is equipped with an elastic gasket. 3. The tank according to claim 1, characterized in that the hollow cylinder in the lower part under the thread is made with a crimp ring belt.