DE7115851U - Waterproof wall duct for electrical cables - Google Patents

Description

Dipl. Phys. Dr. rer. nat. Wolfgang Kempe

PATENT ADVOCATE

68OO Mannheim 25

DUraratraB · WI

Telephone: Office (O891) 2ΒΘΘ7 Apartment (OBStI) -4OSSBI

Postal address: ββΟΟ Mannheim 1 P.O. Box 1873

April 15, 1971 Mü 13

Beton-Bau GmbH

6833 Kirrlach

Mannheimer Strasse 22

"Waterproof wall duct for electrical cables"

The invention relates to a waterproof wall through ffi-p pifrlrfrri3oljft Katn ?!

cut and diameter.

Wall bushings of this kind are required in particular wherever electrical cables are to be routed from the interior of a building above or below ground into the building and where it is important that the interior of the building is secured against intrusion. This demand occurs in Umspannstationsbau especially ^v on .äufig. In the case of larger stations, up to twenty such wall bushings are often required.

April 15, 1971

Mü 13.

The wall bushings previously used in substation construction are structured as follows: A wall opening is created at the desired point for the cable bushing . In the case of prefabricated station buildings, such wall openings "are already provided at the manufacturer's plant and are sealed there with a plastic film. After the cable was pulled through the wall opening, which may have been preceded by a slitting of the film , the cable was either wrapped with a bandage until the wall opening was filled and was sealed, or the wall breakthrough was filled with a sealing resin. Both procedures require a high level of work and the use of expensive sealing materials. Such wall penetrations are therefore uneconomical and prevent rapid erection and commissioning of the station building, especially in prefabricated substation construction .

The invention was therefore based on the object of developing a wall duct of the type described at the outset, in which the disadvantages described are avoided. With the new wall duct, the workload for the v. Sealing of the inserted cable can be reduced to a minimum. Furthermore, the use of expensive materials, in particular casting resins, should be avoided. This object is achieved in accordance with the invention in that an insulating body which can be concreted in a wall opening is provided, with which one end piece of a tapered elastic insulating tube protruding into and through a central opening of the insulating body and depending on the outer diameter of the cable or pipe Can be shortened, is connected in a form-fitting and watertight manner.

711§851-2.i. 71

April 15, 1971 Mu 13

The particular advantage of the wall duct according to the invention is that the insulating body carrying the seal contributes the erection of the wall - be it on site or in the case of prefabricated buildings in the manufacturing plant - is concreted in and then • When laying the electrical cable, the insulating hose only has to be shortened so far that its end cross-section corresponds to the cross-section of the cable to be passed through. Awkward Sealing and pouring work are thus completely avoided when laying the cable.

According to a further proposal of the invention, a particularly expedient embodiment consists in that the insulating body consists of two pipe flanges, the flange surfaces of which are directed towards one another, preferably when concreted in lie in the center plane of the wall and hold one end piece of the insulating tube between them.

\. The IsolJo * fluorescent tube whose cross-section may taper stepwise f j either continuously or in zdehörmonikaförmigen wrinkles, can be inserted into the space formed by the central opening of the iso- Q lierkörpers cavity. Both sides of the wall duct can be covered by covers or plates so that the insulating hose and the interior of the wall duct cannot be damaged or soiled when the wall duct is concreted in and when the station building is possibly transported.

According to a further »particularly useful proposal, one of the two covers of the wall duct serves as a holder for the wall duct when setting in concrete. For this purpose he is attached to the inside of the boarding; junctions for the concrete wall attached.

711S851-2.9.71

April 15, 1971 Mü 13

Further details and useful developments of the invention are specified in the company claims. The invention is illustrated below with reference to one in the drawing Embodiment described and explained in more detail.

The drawing shows his wall duct according to the invention in cross section. 1 is a section of a concrete wall and 2 is a Part of their wooden cladding. One of two pipe flange-shaped Halves 3 and 4 of existing insulating body is assembled in such a way that the flange surfaces 5 and 6 against each other are directed and lie in the central plane of the wall 1. The pipe flanges 3 and 4 have a circular cross-section. But you can also have any other cross-section, for example a rectangular cross-section. Between the flange surfaces 5 and 6 is one end piece 7 of an insulating material Glued in the hose. However, any other type of fastening can also be used to connect the hose end 7 to the insulating body to get voted; it is only important that the connection is watertight.

C The insulating tube 8 has in the exemplary embodiment a gradually tapering in drawstring-shaped folds 9 Cross-section on. In other embodiments, the cross-section may be of the insulating tube 8 continuously taper. Due to the narrowing of the cross-section of the insulating tube, it is possible by shortening the tube at its free End piece to always generate the exit cross-section that corresponds to the cross-section of the cross-section to be passed through the wall duct electrical cable or pipe. The insulating tube 8 can either be on the right or the the left side of the wall 1 extend. This is important for the cable entry insofar as the cable is of course intended

April 15, 1971 MU 13

moderately from the side of the larger cross-section of the hose 8 is introduced into the hose. In the inventive Wall feed-through, the cable installer can therefore freely choose at any time whether he wants to remove the cable from Guide the fcs * through the wall duct to the right or left want.

The insulating tube shortened according to the outer diameter of the cable 8 encloses the cable passed through in a form-fitting and watertight manner. To increase the security of the

of

Sealing and protecting insulation material '; hose 8 against mechanical The transition point between cable and hose and the hose along its entire length can be damaged wrapped with plastic layers, preferably with insulating tape will. Furthermore, it may be useful in certain applications, the cavity between the insulating body 3 »4 and the Isolierstoffschlauch 8 on the one hand and / or between Isolierst of fschlauch and the cable, on the other hand, to be filled with filler material, preferably glass fiber material.

r It is particularly to be emphasized. that no special tools are required when assembling the cable, and that the highly elastic, ie flexible, wall duct greatly facilitates the laying of the cable. This elasticity also prevents damage to or destruction of the wall duct if forces, for example due to temperature fluctuations, earth movements or the like, act on the cable during later operation.

When attaching the wall duct according to the invention in

April 15, 1971 Mü 13

the wall 1 is expediently proceeded as follows: A cover 10, which serves as a holder for the pipe flange 3, is fastened to the wooden cladding 2 at the desired point 6, wall duct. The pipe flange 3 is - as already mentioned - glued together with the insulating hose 8 and the opposite pipe flange 4 on the flange surfaces 5 and 6 and thus forms; a uniform molded body. The insulating tube 8 is pushed into the cavity 11 formed by the central opening of the insulating body 3, which is then closed by a second cover, not shown in the drawing, which corresponds to the cover 10 in shape. The interior of the insulating body 3, 4 and the insulating tube 8 are thus protected against the ingress of concrete mass during the manufacture of the wall 1. If the wall duct according to the invention is in prefabricated components. ¹ - used, it is advisable to leave the cover on the wall duct during the transport of the wall parts, since damage to the sensitive insulating tube 8 can be avoided in a simple manner.

Of course, the wall duct according to the invention can also be built into walls at a later date. To this end a breakthrough is made in the wall, into which the insulating body 3, 4 with the insulating tube 8 and the lids 10 used and then set in concrete.

The seal of the wall duct according to the invention is independent the cross-section and diameter of the electrical cable or pipe through the expandable insulating tube 8 in each Case secured. The wall duct according to the invention can therefore be used universally.

Claims (9)

- 7 - April 15, 1971 MU 13 claims 1. Waterproof, insulating wall bushing for electrical cables or pipes of any cross-section and diameter s, indicated by a ( insulating body that can be embedded in a wall opening, with the one end piece of a tapered elastic Insulating hose, which is in and through a central The opening of the insulating body protrudes and can be shortened according to the outer diameter of the cable or pipe, in a form-fitting manner and is connected watertight » 2. Wall bushing according to claim 1, characterized in that the insulating body consists of two pipe flanges, the flange surfaces of which are directed towards one another, preferably in the central plane of the concreted-in state Wall lie and between them hold one end piece of the insulating tube. 3. Wall bushing according to claim 1 or 2, characterized in that that the insulating tube is continuous rejuvenates. April 15, 1971 MU 13 4. Wall bushing according to claim 1 or 2, characterized in that that the insulating tube tapers gradually in accordion-like folds. 5 · wall duct according to one of claims 1 to 4, characterized characterized in that the cavity between the insulating body, insulating hose and cable or pipe, by filler, preferably glass fiber material is filled. 6. Wall bushing according to one of claims 1 to 5 »thereby characterized in that the insulating tube is wrapped around the outside with layers of plastic, preferably insulating tape is protected. 7. Wall bushing according to one of claims 1 to 6, there- ^ - · characterized in that the insulating tube can be pushed into the cavity formed by the central opening of the insulating body and that both sides of the wall duct can be covered by covers or plates through which the cable or pipe can be passed. 8. Procedure for setting in concrete eira · wall duct according to April 15, 1971 MU 13 Claim 7 »characterized in that one of the two covers on the inside of a holding the concrete mass Cladding is attached and serves as a bracket for the wall duct. 9. The method according to claim 8, characterized in that the insulating tube in the through the central opening of the insulating body formed cavity is inserted and dsr insulating body through the second cover to Protection against ingress of concrete mass or the like is closed. Schutzaiwpr. & / *} IiBI. tb aairOek pulled.