MXPA96001648A - Aeration apparatus of a - Google Patents

Abstract

A water aeration apparatus is provided, which has a rigid support plate which, in an operating position, is essentially horizontally positioned. The support plate has a substantially flat upper surface and at least one opening for air. An elastic plate of elastomeric material is placed on the upper surface of the support plate. The elastic plate is provided with a plurality of fine slots, which can be widened by the air that is introduced between the support plate and the elastic plate. The elastic plate has a lip surrounding it in the form of a seal, the downwardly directed flange of the support plate is to be secured to it in a hook-like manner.

Description

WATER AIREATION APPARATUS BACKGROUND OF THE INVENTION The present invention relates to a water aeration apparatus having a rigid carrier or support plate, which in the operating position is essentially horizontally positioned. The upper surface is flat and the aerating apparatus has at least one opening. An elastic plate of rubber or the like is placed on the support plate and its flanges are secured in seal form to the ridges inclined outwards, downwards of the support plate. The elastic plate has a plurality of fine grooves, whereby air can be introduced between the support plate and the elastic plate and broaden the grooves. With the water aeration devices known so far of this general type, the flange of the elastic plate is placed on the outside of the flange inclined outwards, directed downwards of the support plate. The flange of the elastic plate is then surrounded by a steel collar to secure the elastic plate. It is therefore an object of the present invention to improve the securing of the elastic plate of the water aeration apparatuses of the general type mentioned above, in such a way that with a special positive securing of the flange of the elastic plate, it can facilitate the assembly and disassembly of the elastic plate.

BRIEF DESCRIPTION OF THE DRAWINGS This object and other objects and advantages of the present invention will be clearly apparent from the following specification together with the accompanying schematic drawings, in which: Figure 1 is a vertical cross-sectional view through an exemplary embodiment of the apparatus of water aeration of the plate type, inventive; Figure 2 is a partial plan view of the flange portion of the aeration apparatus of Figure 1; Figure 3 is a partial plan view of that portion of the aeration apparatus of Figure 1, which is provided with slots; and Figures 4-6 are cross-sectional, vertical views through modified, inventive plate type water aerators.

BRIEF DESCRIPTION OF THE INVENTION In accordance with the present invention, the flange of the elastic plate surrounds the flange directed downward and inclined outwardly of the support plate. In this form, a positive connection is achieved in which the flange of the elastic plate surrounds the outwardly inclined flange, directed downwardly of the support plate in a hook-like manner. In this connection, the flange of the elastic plate can be viewed in such a way that the flange inclined outwards and directed downwards of the support plate is completely surrounded by the flange of the elastic plate. For the realization of such a positive connection, the flange portion of the elastic plate may have a smaller diameter than the support plate, so that during mounting it imparts a light protection to the elastic plate. This improves the clamping forces even more and leads to approximately a positive, additional frictional connection. The edge portions of the elastic plate are advantageously additionally provided, in such a way that they are thicker and in particular, preferably in such a way that this thickness is several times greater than that of the active part of the elastic plate which is Provides with the slots. This provides a strong clamping ring on the elastic plate.

According to a specific embodiment of the present invention, the upper side of the elastic plate is not flat; on the contrary, the elastic plate is provided with a finishing flange which surrounds the flat surface of the elastic plate and which in this way projects beyond the active, superior, flat surface of the elastic plate. This results not only in an advantageous reinforcement and a strip that can be fastened, but also a favorable flow effect is achieved. In particular, during the operation of the aeration apparatus, this circumferential rim prevents disadvantageous transverse flows (radial flows) that could lead to too much restriction of the production of the air / water mixture. Thus, a wider air stream of fine bubbles is achieved. It should be noted that this type of flange configuration of the elastic plate can also be used for such water aeration apparatus having a different securing of the flange of its elastic plates to the support plate. Other specific features of the present invention will be described in detail in the following.

DESCRIPTION OF THE PREFERRED MODALITIES Now with reference to the drawings in detail, the inventive aeration apparatus is placed horizontally in the water and is supplied from a common source to which the aeration apparatus is connected. The connection and support are made by means of a connector 2, which is centrally placed on and extends perpendicular to the lower part of a rigid carrier or support plate 1; a hose, tube or the like is connected to the connector 2. The support plate 1 is in the form of a molded plastic body or the like and has the circumferential shoulder 3 which is inclined outwards and extends perpendicularly downwards. Placed on the substantially flat upper surface 4 of the support plate 1 there is an elastic plate 5 which is contemplated as a molded rubber body and has a thicker portion above the connector 2. On the larger portion of its extension ( the ring-shaped portion 6), the plate 5 is provided with thin slots 7. As can be seen from Figure 1, the plate 5 is positively connected to the rim 3 of the support plate 1. When the compressed air is introduced into the connector 2, the air passes between the surface 4 and the elastic plate 5. The fine grooves 7 open, such that fine air bubbles pass into the water. When air is not supplied to the aeration apparatus, the slots 7 are closed in a seal shape. A circumferential flange 8 of the elastic plate 5 surrounds the flange 3 of the plate 1, with the leg 9 directed downwardly of the flange 8 extending to the lower face 10 of the plate 1. This results in a hook-type connection , although it can be released by elastic deformation of the plate 5, it is safe and airtight to the air under the pressure of the compressed air. To achieve a mechanically secure coupling, the thicknesses of not only the leg 12 resting on the outer circumferential surface 11 of the flange 3, but also the leg 9 and the part 13 connecting the legs, are such that the thicknesses of these parts they are appmately 2 to 3 times as large as the thickness of plate 5 in ring-shaped portion 6. In addition, the diameter of the plate 5, in the un-installed state, is slightly smaller, by about 1-4%, such that the flange 8 surrounds the support plate 1 with an inherent, elastic tension. This produces positive and frictional connections between the support plate 1 and the plate 5. The outer circumferential portion of the plate 5 is not only leveled with the leg 12. In addition, the outer circumferential edge of the upper surface 14 is defined by a flange 15 circumferential, which is surrounded at the top and has a height that is a multiple of the thickness of the ring-shaped portion 6. This flange 15 not only reinforces the flange 8 and not only allows for better handling, but also forms an obstacle class for the transverse flow of water in the direction of the arrow 16. If the flange 15 is not provided, such transverse flow of the water could lead to a reduction or restriction of the bubble discharge stream. By providing the flange 15, the bubble stream is expanded and becomes more effective. The flange 8 can also be provided with one or more projecting tabs 17. These tabs can be manually held and facilitate assembly and disassembly. The tongues 17 are placed expeditiously in the region of the connecting part 13 of the leg and in particular project radially outwards. The tabs 17 have a rib 18 to increase the ability to hold the tabs. For particularly large voltages, the positive connection between the two flanges 3 and 8 can be ensured by the additional measures. For this reason, according to the embodiments illustrated in Figures 4 and 5, a rigid ring 19 is secured below the support plate 1, for example by screws 20 that are distributed around the periphery of the ring 19 and that are screwed into the projections 21 on the underside of the support plate 1. In the embodiment of Figure 4, the outer periphery of the ring 19 is provided with a circumferential recess or recess 22, to receive the part 13 that connects the leg. The ring 19 can also be provided with projections 23 to provide a reinforcement on the underside. In the embodiment of Figure 4, the ring 19 is configured and secured in such a way that in the assembled state, the part 13 connecting the legs is clamped between the ring 19 and the flange 3. Such a clamping effect is also produced with the ring 19 of the embodiment of Figure 5, although in this embodiment the ring 19 has an additional flange 25, which is directed towards the support plate 1 and acts on a flange 26 which is directed radially downwards from the leg 9. to similarly hold this flange by pressing it against the support plate 1. In the embodiment illustrated in Figure 6, the underside of the support plate 1 is provided with a concentrically arranged circumferential ring 26 'which is illustrated by a line of dots and stripes and can be similarly used to receive the screws 20. In the embodiment of Figure 6, there is no ring 19. The leg 12 has either a circumferential projection 27 or has several projections placed on its periphery.; the projection 27 is provided with a hole 28, which can serve to house or have wires passing through it, similar threads or filaments that can be interlocked or interconnected or can be connected to the special anchoring means. Of course, the present invention is in no way restricted to the specific description of the specification and drawings, but also covers any of the modifications within the scope of the appended claims. Having described the invention as above, property is claimed as contained in the following:

Claims (18)

1. A water aeration apparatus, characterized in that it comprises: a rigid support plate which, in an operating position, is essentially horizontally placed and has a substantially flat upper surface, the support plate has at least one opening for air and also has a flange tilted outward and directed downward; an elastic plate of elastomeric material, which is placed on the upper surface of the support plate and is provided with a plurality of thin grooves, which are adapted to be widened by the air received by the plate and introduced from at least one opening between the support plate and the elastic plate, the elastic plate has a flange means which surrounds in seal form, the downwardly directed flange of the support plate to be secured thereon in a hook-like manner.

2. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate completely surrounds the flange directed downwards of the support plate.

3. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate surrounds the flange in the downward direction of the support plate in a play-free manner.

4. The water aeration apparatus according to claim 1, characterized in that at least the portions of the surrounding flange means have a thickness that is considerably greater than the thickness of a portion of the elastic plate that is provided with the grooves. .

5. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate is frictionally positively connected to the flange inclined outwards and directed downwards of the support plate by means of the inherent tension, elastic of the elastic plate.

6. The water aeration apparatus according to claim 1, characterized in that the elastic plate has an upper surface which is surrounded by a circumferential rim that is placed in the vicinity of the rim means.

7. The water aeration apparatus according to claim 6, characterized in that the rim has a height that is considerably greater than the thickness of a portion of the elastic plate, which is provided with the slots.

8. The water aeration apparatus according to claim 7, characterized in that an upper surface of the rim is rounded.

9. The water aeration apparatus according to claim 6, characterized in that the rim is part of the surrounding rim means.

10. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate is provided with at least one projecting tongue as a hand holder.

11. The water aeration apparatus according to claim 10, characterized in that at least one tongue is profiled.

12. The water aeration apparatus according to claim 10, characterized in that at least one tongue joins a lower portion of the flange means of the elastic plate.

13. The water aeration apparatus according to claim 1, characterized in that a rigid ring is secured to a lower face of the support plate, the ring holding at least portions of the hook-shaped flange means of the elastic plate, between the ring and the support plate.

14. The water aeration apparatus according to claim 13, characterized in that the ring is secured to the support plate by means of screws. fen.

The water aeration apparatus according to claim 13, characterized in that the ring has an outer periphery, which is provided with a recess for receiving a flexed, lower portion of the flange means of the elastic plate.

16. The water aeration apparatus according to claim 13, characterized in that the flange means of the elastic plate is provided with a radially inwardly projecting flange portion, which is engaged by a projection of the ring.

17. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate is provided with either a plurality of projections distributed over its periphery or with a circumferential projection, with the projection or projections that are provided with a plurality of holes for receiving a filamentary holding means.

18. The water aeration apparatus according to claim 1, characterized in that the flange means of the elastic plate, comprises a first leg projecting downwards from the elastic plate, with the first leg of which is provided with a part of connection, which is located separately from the elastic plate and in which a second leg extends vertically upwards from the connection part towards the elastic plate, in which the downwardly directed flange of the support plate is surrounded for the first time. and second legs and the connection part of the flange means of the elastic plate.