DE2137495A1 - Cover for ring-shaped collecting trays of above-ground, flammable liquids absorbing large-capacity containers - Google Patents

Description

United Austrian Iron and Steel Works Aktiengesellschaft, Linz (Austria)

Cover for ring-shaped collecting trays of above-ground, flammable liquids absorbing large-capacity containers

The invention relates to a cover for ring-shaped collecting trays of above-ground, flammable liquids receiving large-capacity containers with an annular roof, which preferably ends over a collecting channel on the outer wall of the collecting tray.

Above-ground large-capacity containers for mineral oil products or the like. must be known with a Surrounding a protective wall, better still to be placed in a collecting basin to prevent the container from leaking or an overflow of the container contents the un-

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Controlled runoff and thus the risk of groundwater pollution to be prevented. The catch basins are often made of steel and have a Faesungsraum, the recording a large part of the container content or the entire container content guaranteed.

Compared to the earthworks or concrete protective dams that have been used for a long time with which such large-capacity containers are surrounded, steel drip pans offer the advantage that in the event of a fire Jeuer is limited to a much smaller surface, which means that the Allows extinguishing devices to the source of the fire. The fire can with relatively small amounts Fire-fighting foam.

If such collecting basins are open at the top, then precipitation can enter the ring-shaped ones unhindered Collecting space between the outer wall of the container and the outer shell of the collecting basin get and are there accumulate. In order to avoid this, it is therefore known become the drip pans with a cover made of sheet steel and to ensure that the rainwater is appropriately drained to the outside. in the If necessary, however, such a cover made of sheet steel prevents the fire-fighting foam from being quickly brought up on the surface of the fire, which makes it very difficult to extinguish the fire.

The invention has therefore set itself the task of eliminating these shortcomings and creating a cover for ring-shaped collecting trays of above-ground large-capacity tanks, in which the binding of rainwater into the collecting tray is prevented and a quick and effective fight against the fire in the event of a fire is made possible.

Starting from a covering of the kind mentioned above, the invention solves the stated object is substantially characterized in that the roof is made in internal temperature of the stored liquid quickly melting or · flame retardant-burning 'plastic · Shortly after the outbreak of a fire is thus the cover "erstört, the surface of the contained in the collecting trough burning liquid is freely accessible and extinguishing foam can be applied quickly and in a simple manner on the surface of the burning liquid "the roof is made according to the invention from a flame retardant deflagrating plastic to prevent burning in case of fire Roof parts are tolerated by the resulting fire wind in the environment and the fire spreads further run, but go out again in the absence of an external source of fire.

A simple cover according to the invention results in that the Daoh consists of overlapping, preferably trapezoidal plastic panels, the one provided with its inner edge between two on the large-capacity container wall, circumferential around it Grip the flanges and support yourself on the floor of the Samael gutter using the lax, downwardly bent outer edge of the rope. The annular roof can therefore be formed from easily manufactured, prefabricated plastic plates be, without) n that the cover would have to be adapted in particular to the annular shape of the drip pan. Since the plastic sheets are self-contained with parts of their

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BATH ORIGINAL "

support the outer edge pulled downwards on the bottom of the collecting chute, is not a separate support for the cover required. Also remain between the support parts of the plastic plates There are mounting openings that allow pressure equalization, so that suction effects in the event of wind currents are avoided, tuck openings also ensure that leakage fluid flowing off via the roof gets into the interior of the collecting trough.

In order to avoid sagging or bending when the plastic panels are larger than normal, · iit further provided that on the plastic panels radial · stiffening ribs are arranged.

In the drawing, the object of the invention is shown in an execution form. X * «own:

FIG. 1 shows a style of a larger, larger container with a drip pan and a cover according to the invention ie Yertikaletaaitt, fig «2 a rope 4 cover in plan view la

greiere «Mafietab, fig. 5 a section according to the idols III-III of Pig. 2 and

Pig. 4 a further section along the line IY-IT of fig. 2 jewell · la grdlere «hate« ta ·· über aar Aufeabjw »reaafcarer fltieeigkeit theeader Obeririucher ttr« iJMweibehtlter 1 i * t in a collecting waana «it steel elech bottom t ua4 an e» # Ä * elehen outside wall 3 * mfgetteilt. The ewifohen tm * m twifphen dtr BebJllter «mJeawaad 4« ad der AuAea * waad I der Auffaagwaaae will vea eiae «fiitefa 5 tWr · covers the over« empty Saaawlriaae $ on the AmAeavaad «of the Amffaagwuiae tilt Ü-föraig · Drain pipes 7 in gleiobJ9 * H | er Ua-

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BATH ORIGINAL

catch distribution on. Outside of the tub's outer wall 3 arranged flow openings of the drainage pipes lie lower than the overflow edge of the inner wall, but higher than the bottom of the channel, so that in the Hinne 6 always remains a water sump and the drainage pipes 7, in which a sight glass can be inserted, are filled with water. From the roof 5 draining Water enters the collecting channel 6 and is discharged to the outside via the drainage pipes 7. Overflow liquid from the container 1 or leakage liquid from leaks above the roof 5 from the large-capacity container 1 exits, is also passed from the roof 5 into the collecting gutter 6, but flows because it are mostly lighter liquids than water, through the inner wall of the collecting channel into the Collecting tray

The roof 5 consists of overlapping, trapezoidal plastic sheets 8, which with their Inner edge! Between two projections 9 provided on the large-capacity container wall and encircling it and support themselves with parts of their downwardly bent outer edge 10 on the bottom of the collecting channel. Around Radial stiffening ribs are used to prevent bending or sagging of the plastic plates 8 11 provided.

When a fire breaks out, the plastic plates 8 melt or burn without their own flame formation, for example at a temperature of 150 ^° C. The cover is thus destroyed and the surface of the burning liquid is "free" for the application of the extinguishing foam.

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Claims (3)

Patent claims: Cover for ring-shaped collecting basins from outside, absorbing flammable liquids Large-capacity containers with an annular roof, which is preferably over a collecting channel on the outer wall the drip pan ends, characterized in that the roof (5) is stored at the burning temperature of the liquid fast melting or difficult to ignite * "flammable burning plastic. 2. Cover according to claim 1, characterized in that the roof (5) consists of overlapping, is preferably trapezoidal plastic panels with their inner edge between two on the Large room container wall (4) provided in order to Grip circumferential flanges (9) and with parts of their downwardly bent outer edge on the collecting channel "nbod" n prop up. 3. Cover according to claim?, Characterized in that that radial stiffening ribs (11) are arranged on the plastic plates (8) » 209813/0988 Blank page