DE202012008818U1 - Stabilizing element for shaft bottoms - Google Patents

Abstract

Stabilizing element for a manhole bottom, in particular a sewer manhole bottom, characterized in that this stabilizing element, preferably made in rod-like or board-like geometry made of plastic, preferably fastened positively and non-positively to the manhole bottom by welding, arranged as a separate component on the underside of the manhole bottom at right angles to the main channel is.

Description

The invention relates to a device for stabilizing shaft bottoms, in particular sewer manhole bottoms, made of plastic.

In sewage disposal technology, manholes made of plastic are known, whose shaft bottoms have a main channel and several inlet connection options, see, for example DE 10 2006 038 664 A1 and EP 2 157 251 A1 , The shafts usually have a circular cylindrical shape. To simplify production, a certain number of inlet connection options are provided in the shaft bottoms, and it is only during installation that it is decided, in accordance with local conditions, how many and which inlet connections are actually used; the rest remain closed. If required, the sealed inlet connection options can also be optionally opened and used at a later date.

Various loads are applied to the shaft floor installed in the ground, in particular loads from earth pressure and possibly groundwater and road traffic. The load directions on the shaft floor are therefore both laterally (horizontally) and from below (vertically). This leads to insufficient stability of the shaft bottom to deformations and usually to a hydraulic impairment of the water flow in the main channel or the side gutters, and possibly to crack or breakage of the shaft bottom, usually in conjunction with leaks, if no sufficient stabilizing elements were installed. Particularly prone to deformation by lateral pressure are the areas of the closed inlet connection possibilities, in which in practice no inlet was connected.

As stabilizing elements are known: longitudinal ribs along the channel bottom, transverse ribs on the channel bottom and a combination of longitudinal and transverse ribs. Example becomes on DE 199 61 414 C2 . DE 42 36 193 A1 and EP 1 617 124 A1 directed. All these stabilizing elements have in common that they are manufactured together with the shaft or shaft bottom in the production process in one piece (one-piece), for example in the rotary sintering process, in blow molding or injection molding.

• 1. Bei in einem Stück (einteilig) hergestellten Schachtböden mit Mehrfachzuläufen ist der erreichbare Grad an Stabilität beschränkt, und damit auch die möglichen Einsatzbereiche.
• 2. Eine ausreichende Dimensionierung und Konstruktion des Schachtbodens beispielsweise mit Verstärkungsrippen führt zu derart komplexen Formen und Bauteilgeometrien, dass sie in einem Stück (einteilig) nur sehr aufwändig hergestellt werden können, weil die Schachtböden den Produktionsformen nicht mehr problemlos entnommen werden können. Die Alternative, die Wandstärke der Schachtböden zu erhöhen ist nicht immer zielführend und würde, soweit technisch überhaupt machbar, wegen des erhöhten/zusätzlichen Materialverbrauchs zu hohe Produktionskosten nach sich ziehen. Zudem gibt es in Abhängigkeit von Bauteilgeometrie und Produktionsverfahren maximale Wandstärken, die nicht überschritten werden können, die jedoch für den erforderlichen Einsatzbereich des Schachtbodens in Hinsicht auf dessen Stabilität noch nicht ausreichend sind.
• 3. Bei manchen Herstellungsverfahren, wie zum Beispiel dem Rotationssinterverfahren und dem Blasformen, bilden sich außen angeordnete Verstärkungsrippen auf der Innenseite des Schachtbodens in Form von Vertiefungen ab. Wenn die Vertiefungen quer oder schräg zur Fließrichtung des Abwassers verlaufen, wird dadurch der Ablauf hydraulisch behindert; zudem können sich in den Vertiefungen Feststoffe ablagern. Dadurch erhöht sich der Wartungsaufwand des Schachtsystems bedingt durch zusätzliche Reinigungsarbeiten.
• 4. Der Werkstoff des Stabilisierungselements muss bei einteiliger Produktion identisch mit dem Schachtboden sein. Diese Einschränkung in der Materialauswahl, in Verbindung mit begrenzter Wandstärke und eingeschränktem Freiheitsgrad in der Bauteilgeometrie, sind Ursache für eine ungenügende Stabilität des Schachtbodens.

The disadvantage of the previously known stabilizing elements consists essentially of four points:

• 1. In one-piece (one-piece) manufactured shaft bottoms with Mehrfachzuläufen the achievable degree of stability is limited, and thus the possible applications.
• 2. Sufficient dimensioning and construction of the shaft floor, for example, with reinforcing ribs leads to such complex shapes and component geometries that they can be produced in one piece (one piece) only very expensive, because the shaft bottoms the production forms can not be easily removed. The alternative of increasing the wall thickness of the shaft bottoms is not always expedient and, if technically feasible at all, would entail high production costs because of the increased / additional material consumption. In addition, depending on the component geometry and the production method, there are maximum wall thicknesses which can not be exceeded, but which are still insufficient for the required field of use of the shaft bottom in terms of its stability.
• 3. In some manufacturing processes, such as the rotational sintering process and the blow molding, externally arranged reinforcing ribs on the inside of the shaft bottom form in the form of depressions. If the recesses are transverse or oblique to the flow direction of the waste water, thereby hydraulically hindering the flow; In addition, solids can be deposited in the depressions. This increases the maintenance of the shaft system due to additional cleaning work.
• 4. The material of the stabilizing element must be identical to the shaft bottom in one-piece production. This restriction in material selection, in conjunction with limited wall thickness and limited degree of freedom in the component geometry, are the cause of insufficient stability of the shaft bottom.

The invention has for its object to provide a simple to produce and mount stiffening, which leads to permanent stabilization of the shaft bottom, without adversely affecting the internal geometry and make the wastewater-leading areas hydraulically optimal.

This is achieved by the features stated in the characterizing part of claim 1 according to the invention.

Further advantageous embodiments of the invention are specified in the subclaims.

The present invention provides a device which is extremely easy to handle and by means of which a shaft bottom can be permanently made dimensionally stable.

By design as a separate component, the choice of material from which the stabilizing element is made, and its concrete embodiment, determined according to the stabilization requirements determined for the shaft bottom to be stabilized and its use. Preferably, a material is chosen which allows a connection of the stabilizing element with the shaft bottom by welding.

In the design of the stabilizing element as a separate component is excluded that arise on the inside of the shaft bottom production-related depressions.

Since the stabilization element is made of stiffer material than the shaft bottom, it has smaller dimensions than would have a construction of the same material and thus saves resources.

The invention will be explained in detail below with reference to the embodiments and the drawings. Show it:

1 : A sewer manhole floor

2 : A stabilizing element

3 : Sewer manhole bottom with built-in stabilizing element

1 shows a sewer manhole floor 1 from the perspective of diagonally below. He has a main chute 2 on as well as several inlet connection possibilities (side channels) 3 , The inlet connection options 3 are still closed. The main channel is with longitudinal ribs 4 stiffened. At the recording devices 5 becomes the stabilizing element 6 fastened with screws.

2 shows a stabilizing element. It has a geometry adapted to the bottom of the shaft. It has receiving holes 8th for screws on.

3 shows a sewer manhole floor 1 with built-in stabilizing element 6 ,

According to the stabilization requirements, the stabilizing element can be designed by varying its shape in the production so that it is at any angle to the main chute 2 can be arranged.

The shape of the stabilizing element can be designed at the connection points so that it can be connected in any technically possible manner with the shaft bottom, in particular by screwing, welding, gluing, locking or plugging.

The particular place of use of the manhole bottom varies in depth, expected groundwater pressure and soil stability. These different requirements are taken into account by choosing the material to be used for the stabilizing element and its shape. It is preferably made of plastic, but also as metal or composites. The geometry of the stabilizing element is preferably chosen as the shape of the shaft bottom adapted elongated profile; Use but find any technically required geometries as listed in dependent claim 5.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102006038664 A1 [0002]
• EP 2157251 A1 [0002]
• DE 19961414 C2 [0004]
• DE 4236193 A1 [0004]
• EP 1617124 A1 [0004]

Claims (6)

Stabilizing element for a shaft bottom, in particular a sewer manhole base, characterized in that this stabilizing element, preferably manufactured in rod or board-like geometry made of plastic, preferably by welding positively and non-positively attached to the shaft bottom, arranged as a separate component at the bottom of the shaft bottom at right angles to the main channel is. Stabilizing element according to claim 1, characterized in that it is to be fastened at any angle to the main channel at the bottom of the shaft. Stabilizing element according to claim 1, characterized in that it is due to the respective configuration in any technically possible manner, in particular by screws, welding, gluing, locking or plugging at the shaft bottom positively, positively or positively and non-positively attach. Stabilizing element according to claim 1, characterized in that it consists of a material which is suitable for giving the shaft bottom the stability required for the respective intended use, in particular of metal, plastic or composite materials. Stabilizing element according to claim 1, characterized in that in any technically required geometry (for example rod, L-profile, T-profile, U-profile, Z-profile, tube, rectangular tube, square tube, frame profile, construction profile, rail , Board) is designed. Stabilizing element according to claim 1, characterized in that it has one of the respective shaft bottom bottom adapted geometry or fit.

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