FI75041B - GASBEHAOLLARE MED VARIABEL NYTTOVOLYM. - Google Patents

Description

75041

Gas tank with variable useful volume. - Gas production with variable capacity.

The invention relates to a gas tank with a variable useful volume, a fixed side wall and a sealing membrane arranged between the side wall and the lid of the gas tank.

Such gas tanks are known. In order to maintain the operability and reliability of the sealing membrane, devices for stabilizing and centering the lid are necessary. If a certain pressure is also to be maintained in the tank, additional problems arise from increasing, distributing, transferring and securing the position of the load. With larger gas tank diameters, the constructions then become cumbersome.

Known constructions use, for example, central vertical guide columns or rope guides attached to the bottom or a fixed cover, which are guided gas-tightly out of the gas space through a layer of steam arranged on the cover.

The object of the invention is to provide the simplest and most reliable control possible for such a gas tank lid. In addition, it should be suitable for all tank structures at no additional structural cost.

The invention solves this problem with a controller characterized by the features set forth in claim 1.

The accompanying drawing shows an application example of the subject of the invention in a simplified form.

Figure 1 shows a vertical section of the gas tank.

Figure 2 shows a horizontal section along the line 11-11 in Figure 1.

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Fig. 3 shows a vertical section according to Fig. 1, in which the guides are on a larger scale and in more detail.

Figure 4 shows a section along the line IV-IV in Figure 3 on an even larger scale.

Fig. 3 shows a section along the line V-V in Fig. 3 on an even larger scale.

Figures 1 and 2 show in a simplified form a gas container with a circular cylindrical, rigid wall Wf base B and a sealing membrane 5 arranged between the wall and the lid D. In the gas container shown, the lid consists of a rigid ring R the roof and the tank are equipped with a fill / drain valve.

Inside the tank space, between the fixed side wall W and the lid R, D, there are three independently operating vertical guides, generally indicated by reference numeral 10. They comprise three main parts, namely a short guide element 11 fixed to the wall W, a guide rail 12 and a holder 13 connected to the cover R, D. The guide rail 12 is movably guided in the guide element 11, and the holder 13 is in turn movably guided in the rail 12.

The upper right of Figure 1 shows the relative position of this element when the container is full and the lower left is when the container is empty. It should already be noted that the cover can also consist of a rigid plate, possibly stiffened by ribs, without this affecting the construction of the vertical guides.

Figure 3 shows the vertical control in more detail. In order to make the guide rail 12 and the holder 13 easier to move, both the guide element 11 and also the holder 13 are provided with 3 75041 pairs of rollers 14 guided on the tracks of the guide rail 12. The rail has a double-housing cross-sectional profile, as shown in Figure 4.

A small clearance is provided between the roller and the guide tracks so that the rollers are only on one side against the guide track at a time and can rotate freely in all positions.

Due to the grooves on opposite sides of the profile, the guide element 11 and the holder 13 protrude somewhat into the rail. Attached to this protruding part of the rail are pairs of rollers 14. The arrangement of two pairs of rollers for each guide element and the bending stiffness of the guide rail prevent the cover from being tilted.

By means of the ropes 20, 21 running on the guide rails, a pick-up device is provided, which in each position of the cover controls the relative position of the parts of the vertical guide.

In addition, a rope roller 22 is arranged up and down on the guide rail 12. The rope 20 is attached to the lower surface of the holder 13 and is guided over the lower roller 22 to the lower surface of the guide element 11, to which it is again attached. Similarly, connected by a cable 21 of the holder 13 with the upper side of the upper element 11, wherein it is guided over the top roller 22.

Both ropes thus form a kind of forced guide, which in use forms a protection against damage to the sealing membrane. If, when emptying the gas tank, the guide rail 12 were to jam in the highest position shown on the left in Fig. 3, there would be a risk of damaging the sealing membrane.

As an additional protection against damage to the sealing membrane, wide rollers 23 are arranged on the sides up on the guide rail 12. 75041

When installing the vertical guides, make sure that they are oriented as precisely as possible vertically. The ideal situation can only be achieved with high construction costs and detailed installation work.

In addition, as inaccuracies have to be taken into account during construction (dimensional tolerances) and during operation (expansions), there is a risk that the guides will jam because they are connected to each other through the cover. For this reason, the lid is not fixed, but is connected to the holders 13 to a limited extent in a horizontally displaceable manner.

Figure 5 shows an embodiment of this connection. The holder 13 is provided with pairs of rollers 14 and the cover is torsionally rigidly connected to short horizontal rail parts 30 with a housing-like cross-sectional profile.

The holder 13 protrudes slightly into the groove in the profile and the weight of the cover rests on the pairs of rollers 14.

The guide rail 12 is partially closed from below and above by the plates 15 and these at the same time form stops in the guide element 11 for the upper and lower positions of the vertical guide 10.

As shown in Fig. 3, the stroke length of the guide rail 12 is exactly half the stroke length H of the cover R, F.

The control structure in the gas space requires a maintenance-free and corrosion-resistant structure. This is ensured by using stainless steel, or alternatively plastic in all mechanically stressed parts.

In addition to the example presented to illustrate the invention, other embodiments are also possible. Thus, instead of rollers, for example, a plain bearing or ball-roller construction with correspondingly adapted guide rails can also be used.

Il

Claims (7)

1. Gas container with a variable utility volume, a fixed, side wall (VJ), a vertically movable lid (D) for the gas container as well. a sealing membrane (S) arranged between the side wall and the gas container lid, characterized in that at least three evenly spaced vertical control members are arranged within the container between the fixed side wall (W) and the lid (D) under the sealing membrane (S). (10), each of which comprises a guide rail (12), a shorter end made on the wall mounted guide element (11), wherein the guide rail is slidably guided, and a slidable guide along the guide rail, coupled to the lid (13), and each vertical control means (10) is provided with displacement elements (20, 21, 22) which control the relative movement of the three control elements such that the stroke length of the guide rail (12) is half the stroke length of the holder (13). Gas container according to claim 1, characterized in that the displacement element of each guide rail (12) comprises on this up and down cable reels (22), over which cables (20, 21) are guided and which cables join the wall element (11) ) with the holder (13) and acts as a guide device for the guide rail (12). Gas container according to claim 1, characterized in that the short guide element (11) and the bracket (13), which are mounted on the guide rail (12) up and down, are arranged on the guide rail (12), downward. Gas container according to claim 1, characterized in that the short control elements (30) are fixed to the gas container lid, which enable the lid to be displaced to a limited extent on the stoves (13).