DE8321798U1 - Closure with degassing valve - Google Patents

Abstract

1. A seal (1) with a degassing valve for the filling and extraction apertures of fluid containers, a gas-permeable micro filter laminar disk (2) being secured by its outer edge surface inside an annular groove of the seal (1) below the degassing aperture, which is open on the outside, characterised in that the free space rising behind the disk fixing (5) is reduced in cross sectional area in the form of steps towards the centre line of the seal (1) ; forming an upper ring surface (3), the inner ring edge (6) of the surface (3) forming the lower aperture edge of the degassing aperture (4) and limiting the convex curvature of the valve disk (2).

Description

Closure with degasu ν gs ν ε ν til

The innovation concerns a closure with a degassing valve for filling and removal openings of liquid containers, in which a gas-permeable micro-filter laminate disc, with its outer edge surface inside an annular groove of the closure is attached below the outwardly open degassing opening.

Detachable sealing pots serve as closures, for example or press closures, screw or bung closures.

What is required are closures that prevent the passage of liquids or solids, but which prevent the Passage of gases, if possible in both directions, i.e. should enable pressure equalization.

These closures are in the form of specially designed closures, so-called vent closures, also for closing of storage and transport containers for liquids or solids. In storage or transport containers for liquid or solid substances, especially chemicals, after filling and sealing Overpressure or underpressure occur. A negative pressure can arise, for example, when liquids that have been filled in warmly cool. An overpressure can develop e.g. due to the decomposition or degassing of the contents of the container, whereby the decomposition due to unintentional or unavoidable increase in temperature during transport or storage and / or can be accelerated many times over by catalytic influences.

The positive or negative pressures can become so great that the valves can be destroyed.

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Favorable EntgasungsverschlUsse to micro FiIter laminate discs have been found, for example, in the United -schlußstopfen · ¹ are immovably welded or glued in front of the vent.

Because of the higher internal pressures that occur in particular occur when a filled container crashes make sure that there is enough gas pressure in possible can escape for a short time. This is required, among other things protect the containers that are heavily loaded, especially when the outside temperature is warm.

In this requirement, the filter disc may'm not sized too small "to make the otherwise rich the passage" does not cross-sections from "around such Oasdrücke in a short time to escape. On the other hand verifiable proven in sufficiently large slices that stwar right a sufficient ¹ amount passage to Time is reached, but then the lens material is overstressed and tears.

It is about the task of being non-destructive To ensure that the valve disc can be stored in the closure device under rough operating conditions, with the largest possible gasification and disks / area should be available.

According to the innovation, these tasks are achieved by 4ass the free space in the lock that rises behind the pane fastening in a stepped manner to the central axis of the lock is constricted to form an upper annular surface, the inner annular edge of the surface being the lower opening edge of the degassing opening and the bulge limitation of the Forms valve disc.

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The increasing internal pressure can escape through the firmly clamped micro-filter laminate disc about the free space behind the attachment point of the Disc and from there through the vent escape outside. A further increase in pressure bulges the disk upwards until it reaches the edge of the ring Constriction and is supported against a wider movement upwards

The mare's facility is gas-permeable, so the entire one Disc surface outside of its attachment surface as Degassing area is available. The ring edge acting as a support shoulder prevents an impermissible Bulge and thus overstretching of the disc.

The disk is advantageously glued or welded into the ring groove. So that the unvarnished disk feeding to its mounting seat is facilitated, can be formed in one piece in an embodiment of the innovation at the bottom of the closure an annular sleeve, whose Inside diameter is the outside diameter of the valve assembly with movement game corresponds.

In the drawing is an embodiment of the innovation for example shown.

Show it:

FIGS. 1 and 2 schematically show the pane attachment inside the lock. For the sake of clarity, these figures refer to details of the closure been waived.

Fig. 3 shows a longitudinal section through a bung lock of conventional size with an incorporated valve disc.

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As can best be seen from FIGS. 1 and 2, the micro-filter laminate disk 2 is glued into the closure device 1 in an annular groove. A free space rises behind the pane fastening 5, which is constricted in a stepped manner to the central axis of the closure 1, forming an upper annular surface 3. The inner ring edge 6 forms the lower opening edge of the degassing 8 ££ opening A and continues to be used as a starting point. Valve disc 1,

As can be seen from Fig. 3, an annular sleeve 7 is integrally formed on the base of the closure device i » whose inside diameter corresponds to the outside diameter of the valve ' Disk 2 ait corresponds to movement play.

Below the bung thread is in vain Recess in the neck an annular seal 6.

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Claims (2)

1. Closure with degassing valve for filling and Removal - ^ openings of liquid containers, in which a gas-permeable micro-filter laminate disc, with their outer edge surface within an annular groove of the closure is attached below the outwardly open vent opening, thereby characterized in that the space in the lock which rises behind the pane attachment (5) (1) in steps to the central axis of the closure (1) to form an upper ring surface (3) is constricted, the inner ring edge (6) of the surface (3) the lower opening edge of the vent opening (4) and the bulge limitation of the valve disc (2) forms. 2. Closure according to claim 1, characterized in that that at the bottom of the closure (1) an annular sleeve (7) is integrally formed, the The inside diameter corresponds to the outside diameter of the valve disc (2) with play.