DE746014C - Protective device for containers and boilers of electrical devices, especially for expansion vessels of oil transformers - Google Patents

Description

Protective device for containers and boilers of electrical equipment, in particular for expansion tanks of oil transformers To prevent overripe in the event of a fire the fire on the flammable insulating oil of the containers and boilers of electrical appliances To prevent rapid drainage devices are already known for (read oil, which a enable the oil to be drained quickly from these vessels if there is a risk of fire. Particularly at risk in this relationship are e.g. B. the expansion vessels of oil transformers, as they contain such a small amount of oil compared to the oil of the impregnation transformer, (In the event of a fire, let the flash point of this oil be reached very quickly can be. The linear drain valve on such expansion vessels is common Arranged so that the Cal can drain into an oil trap when triggered. That Valve here usually consists of a membrane made of glass o. The like. With the help of a remotely triggered energy store is destroyed and thus enables full opening. In the case of transformers, their expansion vessel is attached to an elbow on the lid of the vessel attached dehumidifiers are provided, the incoming air has greater 'flow resistance to overcome, so that when the quick release valve is triggered, the oil as a result of the over the .C`31 existing negative pressure cannot flow off quickly enough. Similar are the conditions for expansion vessels that are completely closed off from the outside air are .. Here, if the Sclinell drain valve was triggered, 01 would only flow out as long as like the air space above the oil of the expansion vessel compared to the outside air none Has negative pressure. In the case of negative pressure, however, no more oil or it is much too slow emanate.

In order to also activate a quick release valve in both cases Rapid equalization of the air pressure in the expansion vessel tnit To ensure the outside air is according to the invention for the air space above your oil a Schnelliiftungsventil provided, which when triggered the valves a quick; : \ acliströnien of the air and thus ensures a quick drainage of the oil.

The quick release valve is expediently next to your Quick release valve for the (@ 1 arranged and the drives or shut-off devices of both Valves are coupled because this ensures quick and even triggering and the operation is simplified in case of danger.

The Znleitting pipes of both valves and possibly also the Valves themselves can be arranged one inside the other, so that both devices have one form an assembled unit.

An exemplary embodiment of the invention is illustrated with reference to the drawing described in more detail.

The transformer t, which is only partially indicated, is not higher lying Ül-'tttSdelinung; sloping 2 connected by a sloping pipeline. The dehumidifier is on the lid of the attsdelnituigsgefäßes 2 above a Kriiminer 3 .I connected. when the transformer is completely sealed off from the outside air This dehumidifier and the manifold are of course not available, because that's about your oil lying air cushion should not have any connection with the outside air and therefore does not need to be protected against the absorption of moisture.

The quick release valve G for the oil is connected to the oil of the expansion tank via a pipe of large diameter, so that the oil can flow quickly if the membrane is destroyed. The air valve 9 is arranged next to it and is also flanged to the bottom of the expansion vessel with a connecting pipe. The pipe 7, however, protrudes so far into the interior of the expansion vessel that its ventilation is always in connection with the air space above the oil The operating levers of the valves (> and () are connected via a hupplungsliebel 8 miteititin @ ler, so that the valves can be triggered at the same time The corresponding amount of air enters through the bore j in (las expansion vessel.

Claims (1)

YATt? NTANSYRC'tCIII :: I. Protective device for containers and Boilers of electrical appliances, inslkson <lerc for expansion vessels from # ") ltt-ansfr:> r- inators that finite a linear drain valve for (read C il and using a dehumidifier provided or vented from the outside air s closed. rope are, and those by the Triggering of the quick release valve (read (_) 1 is derived into a (Jlfaiiggrttbe, that by gelennz-? iclntet, measure for the air space above the oil valve ( 9) is provided, which is l (rsting the valves ((), 9) a fast \ ach flow of air allows. a. Device according to claim I, there- characterized in that the fast ventilation valve (c)) next to the quick ahl: tl;) vetitil ((i) is arranged and the drives or spouts of both valves are coupled. 5. Device according to claims t and 2, characterized, (measure the Connecting pipes of the valves or the Valves themselves are arranged one inside the other. To delimit the registration object state of the art are ini 1 -, r- submission procedure no publications in costume has been drawn.