DE672353C - Metal vacuum container for holding low-boiling, liquefied gases under pressure - Google Patents

Description

Metal vacuum container for holding low-boiling, liquefied Gases under pressure The invention relates to any metal vacuum container Shape and size to accommodate low-boiling, liquefied gases under pressure.

The object of the invention is set to reduce the incidence of heat in the storage space to diminish by limiting the radiation losses that Eliminate unwieldiness of the vessels with long protruding necks and the device the advantage of a smoother construction and low weight in relation to the capacity admit.

In liquefied gas storage tanks that have become known up to now, attempts have been made to solve these problems in part by building the neck instead of the long protruding neck from individual tubular parts that are nested next to one another and connected to one another. Apart from the additional source of danger, which lies in the many strength-bearing connections of the individual pipe sections, the solution to the task at hand could only partially succeed, since these nested pipe sections of cylindrical or conical design always had to lie above the liquid level, because otherwise the liquid would become one Heat exchange with these would have come. However, additional structures on the inner vessel of a vacuum container mean an increase in weight, bulkiness and radiation losses. This also applies to a well-known receptacle for liquid air for immersing explosive cartridges. The naturally high incidence of heat in such immersion tanks, due to the wide neck of the device, was also sought to reduce by nesting cylindrical or conical pieces of pipe next to one another. Since this connection of the two containers, which protruded up to the liquid level of the inner vessel, also served to hold the immersed cartridge in place, the resulting higher construction of the immersion tank could be accepted for this special purpose, all the more so as all such immersion tanks with a smooth transition from the inner to the outer vessel lose a considerable part of its filling due to evaporation shortly after filling, until the inevitable self-damaging if the connections between the two vessels are long enough. fungus assumes lower values. The d Subject matter of the invention could not be solved by this a special purpose container, since the connections of the two containers lying above the highest possible liquid level, i.e. the true inner vessel, do not mean any significant limitation of the radiation losses and the weight relative to the capacity.

The source of danger in the soldered connection of the conical pipe sections the leakage for the vacuum space was portable with this special device, because a Containers loaded with explosives are treated with great care. For the present subject matter of the invention with an unlimited area of application, must but for this reason alone a fragmented neck of the type described above as are referred to inappropriately.

The thought, however, of completely or partially vacuum-insulating the neck -sink from above into the real liquid-holding space of the container, has not yet commented because it was apparently believed that the liquid would in the throat according to the law of the communicating tubes up to the level of the liquid rise in the container. This is probably the case with a vessel under external pressure Case, but with the above pressure vessel, which is inevitably attached to its vent line, which now leads through the neck and from the depths of the inner vessel back up, wearing a safety valve will also be in the liquid line as a result of the inevitable evaporation set a steadily increasing pressure until the gas column all liquid which has entered the line is forced back into the container Has. Then every now and then a small amount of gas bubbles up from this line Inner vessel and goes into the ventilation line via the safety valve Free. So there are no additional losses in pressure vacuum vessels, if the neck is sunk into the liquid from above under vacuum insulation. These The device is therefore the one with the introduction of the neck from below with regard to insulation and coherence of the structure are equivalent.

However, the significant drawbacks that the neck from underneath fall for pressurized vacuum container forms, by the introduction of the neck of at the top. The safety valve at the end of the vent line and the Connections are only routed to the top of the device, because through the Cold failure from the vessel below results in an air flow in the vicinity of the vessel trains, which leads to a strong tire on the lower part of such an apparatus leads. The operational safety of the valve would suffer if you wanted it down below place on the vessel, as it will soon look like an icicle during operation. In this case, the same risk would arise for the connections and then for the filler neck which consist of water penetration into the apparatus. The cable guides upwards but are extremely uncomfortable and harmful to the smooth vessels, since when filling and Emptying cold tensions can come to the outer vessel.

The laying of the neck, so the strength-bearing and gas or Connections of the two vessels carrying fluid, from above into the fluid space of the inner vessel up to a desired or possible depth thus also offers the mentioned lower heat radiation loss and the advantage of the smoother construction and lower weight, significant operational advantages.

Fig. I shows a vacuum vessel as described above, in which the neck a extends to the bottom of the inner vessel b and protrudes from the outer vessel c only by a certain amount. The vent pipe d extends up to the top of the inner vessel, while the liquid pipe naturally extends to the bottom of the inner vessel. Safety valve f and connections g and lt are at the top.

Fig. A shows another form of the vessel in which the perfect recessed neck a does not reach all the way to the bottom of the inner vessel. Otherwise it is the structure of the vessel is the same as in Fig. I.

Claims (1)

PATLNTANSPRUCII: Metal vacuum container for holding low-boiling, liquefied gases under pressure, characterized in that the neck, namely the Solid connection between the inner and outer vessel that carries gas or liquid under vacuum insulation, wholly or partially into the liquid from above Space of the inner vessel is sunk.