MXPA98007572A - Cover for dren - Google Patents

Abstract

The present invention relates to a cover for drainage comprising a drain cover (1) including openings (2) for the passage of the drain, a filter element (3) that runs through the region of the openings (2) placed in the underside of the lid, wherein the filter element (3) projects into the openings (2) and, on its upper side, the ends are substantially flush with the upper side of the drain cover (

Description

COVER FOR DRAINAGE DESCRIPTION OF THE INVENTION The present invention relates to a cover for drainage, which comprises a cover that includes openings for the passage of wastewater, a filter element that runs through the region of the openings arranged on the lower side F of the cover. 0 With drainage covered there is a problem that, with the exception of larger or similar rocks that can not pass through openings in the drain cover, all pollutants contained in wastewater, such as dust particles , sand, polluting oil, 5 etc., are introduced to the drainage without covering, which can result in deposits forming in the drainage system or becoming environmental charges, respectively. From the US Pat. No. 5, 037, 541, a cover of the initially mentioned type is known, in which the filtering element consists of several overlapping layers of metal lattice, which is held by a basket in the lower part of the drain cap and has a decreasing mesh width from layer to layer in the direction of the fluid. On the one hand, such a structure is difficult to produce, and on the other, in the preaching it results in a simple clogging of the openings of the filtering section. The object of the invention is to provide a cover for a die, in which the problem has been removed. Such an object is achieved with a cover of the aforementioned type, which, according to the invention, is characterized in that the filtering element projects in _ the openings and, in its upper part, leaves substantially < 9 ^ by the top of the drain cover. In this way, a drainage cover is provided that has a filtering effect, which prevents sand, dust, and contaminating oils from entering the drainage. The special design of the filter element prevents the openings from being clogged with particles, and in addition, filtering element can be produced as a simple and coherent part. According to the preferred embodiment of the invention, the filtering element is assembled by at least one base layer and a thin overlapping bond layer, the As it enters completely in contact with the openings, the free fluid through the cross section of the layers increases from the upper part to the lower one from layer to layer. This type of filtering is known per se from Australian Patent No. 400, 960 in combination with a device of lower assurance and shows an excellent filtering effect; only h.jsla certain size, l solids contained in (>] dionaje pui 'cii enter the first however, if that- they came or penetrate, do not cover the filtering element because of the increase in size of the fluid free through the cross section in the following layers, moreover, these are discharged Possible pollutants of the drainage, ie oil or petroleum, the filter element absorbs them to a certain degree and regenerate in a process of biological degradation , which is accelerated in the subsequent layers of air volume increase.The porosity of the material simultaneously causes automatic ventilation of the filter element.Those functions receive help if, according to a further embodiment of the invention, the clear width of the the openings remain the same or, in particular, increase from the upper to the lower part.It is particularly advantageous if depressions are provided to the filter element in its The depressions additionally increase the fluid through the cross section in the lower region of the filter element. The filtering element can be made of single-grain or multi-grain concrete or similar porous materials, i.e. mixtures of asphalt, synthetic materials, etc. It is particularly advantageous if the filter element w ™ j is made of porous synthetic materials highly resistant to abrasion. Such materials are particularly resistant to JGJG variable loads and the stresses resulting from vibrations. In accordance with a further feature of the invention, it is preferable to provide that the filtering element is held by a lattice-shaped support basket attached to the drain cover, where theThe structural strength of the roof was further eroded. The invention will now be explained in more detail by means of the exemplary embodiment illustrated in the drawings. In the drawings, Fig. 1 shows a cross-section through the cover according to the invention, Fig. 2 shows a top view of the cover of Fig. 1, Fig. 3 shows a top view of an alternative embodiment of the cover according to the invention, and Fig. 4 shows a bottom view of the covers of Figs. 1, 2 and 3 respectively. The cover comprises a rectangular drainage lid 1, ie made of metal, which includes ab "ports 2 for the passage of the drain The openings 2 can, for example, be grouped in the form of a screen (Fig. 2) or strip form (Fig. 3).

In the lower part of 3 to the limpet 1 of the drainage, a filtering element 3 is placed, which is designed in its upper part to be complementary to the openings 2, it engages in the last one and completely fills it. so that the upper end 5 is substantially level with the upper side of the cover 1 of the drain. The filtering element 3 is held by a support basket 4 in the form of a lattice, which is attached to the lower part of the lid 1 of the drainage. The filter element 3 comprises a multilayer structure, two layers in the illustrated example, that is, a base layer 5 and a superposed thin bonding layer 6, the free fluid through the cross section of the base layer 5 is longer than the joint layer 6. In addition, it provides the filter element 3 with depressions 7 on its underside, whose width decreases towards the bottom of the depression, so that the free fluid through the cross section of the base layer 5, at the level of the depression 7 at the beginning is intense and subsequently increases gradually in the downward direction. The filtering element 3 or its layers -5, 7 respectively, can be made of any desired waterproof material, preferably single grain or multigrain concrete of different grain sizes, different mixtures of porous asphalt and, in particular, highly resistant to abrasion; different porous synthetic materials. Instead of the illustrated rectangular shape, the drainage lid 1 can have the shape of the drape, and likewise, the number, shape and placement of the ab < rturas 2 is arbitrary.

Claims (6)

1. A cover for drainage comprising a cover for drainage Id which includes aids for the passage of the 5a, a filtering element that by J or region of the colored openings on the underside of the tupa, characterized in that the filtering element is projected towards _ the openings and, on the upper side, the ends are ^ leveled substantially with the top of the lid of the 10 drainage.

2. The cover according to claim 1, characterized in that the filtering element is attached at least to the base layer and a superposed thin bonding layer, 15 which is completely in contact with the openings, the free fluid through the cross section of the layers increases from the top to the bottom from layer to layer.

3. The cover according to claim 1 or 2, characterized in that the clear width of the openings remains the same or increases from the top to the bottom.

4. The cover according to any of claims 1 to 3, characterized in that the filtering element on its lower side is provided with depressions.

5. The cover according to any of claims 3 to 4, characterized in that the filter element is made of porous synthetic materials highly resistant to abrasion.

6. The cover according to any of claims 1 to 5, characterized in that the filtering element is held by a support basket in the form of a lattice attached to the "drain cover".