DE1057675B - Introduction head for a roof stand introduction - Google Patents

Description

The invention relates to an insertion head for one with a metal roof stand tube equipped roof rack entry.

It is known that it is not uncommon for building fires to occur through Overvoltages, earth faults or short circuits caused arcs occur, even if related to the introduction the existing safety regulations have been observed. To protect against overvoltages Surge arresters are occasionally installed because of the relatively high required However, these protective devices cannot be built in in all cases and it costs it is known that many building entries are not equipped with such surge arresters are.

For building entries, insulated conductors are generally used, the insulation of which is below normal paint operating conditions sufficient security against phase flashovers and flashovers against Earth guaranteed. If overvoltages or insulation faults occur, however, these are Lead-in parts and the ladder parts lying in the lead-in head particularly with regard to flashovers endangered.

Attempts have therefore already been made to create roof stand heads in which the ladder against each other in this way be determined that a certain minimum distance is always maintained. It is Z. B. known in porcelain feed-through parts of transition heads for each conductor a longitudinal channel to be provided. Unused longitudinal channels are closed with rubber stoppers. Through the Holding the individual conductors at a certain distance from each other reduces the risk of flashovers Implementation part and in the insertion head, although reduced, but such were also used when using Insertion heads are still frequently observed, generally within the Roof stand tube under the insertion head. The insulation of the conductors lying in the channels is often Destroyed after a short time or at least damaged to the point that short circuits or phase flashovers or earth faults occur.

This destruction of the insulation is essentially caused by the fact that the in the building standing warm air is discharged to the outside through the roof stand tube, with condensation of the water vapor contained in the air enters the roof post. The air circulation in the Moisture entrained in the roof rack is acidic and destroys the conductor insulation. In addition, chemical decomposition occurs as a result of electrolytic phenomena.

Lead-in head
for a roof stand introduction

Applicant:

Wilhelm Peter,
Ludwigshafen / Rhine, Menzelstr. 1

Wilhelm Peter, Ludwigshafen / Rhine, has been named as the inventor

The aim of the invention is to create a roof stand insertion head while avoiding these disadvantages, which occurs in the known heads in the air circulation in the pipe and the resulting standing. Avoids flashovers between the ladders, easy to assemble and economical to manufacture is.

For this purpose there is an insertion head for a roof stand insertion with a metal roof stand tube formed according to the invention in such a way that one on the roof stand tube under Intermediate layer of a seal seated insulating insertion part, which is electrically sufficient with Spaced apart individual longitudinal channels for receiving one conductor each is, serves as a closing element of the roof stand tube to prevent air circulation and sealing rings preferably by means of a union nut and a correspondingly shaped one with channels provided grommet when tightening the union nut the sealing of the longitudinal channels and the Take over the ladder.

Due to the seal between the introduction part and the roof stand tube on the one hand and the Individual conductors and the lead-in part on the other hand, a tight seal is effected at the top, so that air circulation cannot begin.

Further advantages and details of the invention emerge from the following description of an embodiment based on the drawing. The drawing shows one designed according to the invention Insertion head arranged on a roof stand tube in longitudinal section.

The insertion head e rests on the roof stand tube d. A seal / is inserted between the end of the roof post tube and the support ring surface of the insertion head, which provides a hermetic

-. "-. ι. 50.9 527/329

Claims (1)

Closure between the roof stand tube and insertion head guaranteed. The insertion head e has longitudinal channels m through which the conductors f are passed. The conductors / are sealed off from the insertion head e by means of sealing rings i in the longitudinal channels m. According to the illustrated embodiment, the sealing rings i are arranged at the upper mouth of the longitudinal channels. On these sealing rings i, ie on the upper part g of the head e , a grommet j is placed, which is equipped with channels η for the implementation of the ladder / and can be pressed onto a thread h of the upper head part g by means of a union nut k. By screwing on the union nut k , the grommet / is pressed onto the sealing rings i , so that a hermetic seal between the insertion head e and the conductors / is ensured. Claim: Entry head for a roof stand entry with a metal roof stand tube, characterized in that a roof Upright tube (d) with the interposition of a seal (/) seated insulating insertion part ' (e) _r which is provided with individual longitudinal ducts (m) at a sufficient electrical distance from each other to accommodate a conductor (f) , as a closing element of the roof upright tube (d) serves to prevent air circulation and sealing rings (i) preferably by means of a union nut (k) and a correspondingly shaped grommet (; ') provided with channels (s ) when tightening the union nut to seal the longitudinal channels (m) and the conductors (/ ) take over. Considered publications: Swiss Patent No. 77 693;
German Patent Nos. 691 126, 697 958, 655, 674 153, 843 560, 309 501; Austrian Patent Nos. 164 429, 102 892, 85 655; Brochure from SSW S.G.O. No. 46061/102 (1951) on "Universal sockets UMA" and "Transition heads TJMAF «. 1 sheet of drawings © 909 527ß29 5.59