DE2041889C3 - Tank for storing low-boiling liquefied gases - Google Patents

Description

The invention relates to a tank for storing low-boiling liquefied gases with a rigid outer Container, an inner membrane container and one arranged between the two containers, lattice framework made of wood, the spaces between which are filled with insulating material and that has attached to the outer container supports, which at their upper ends of a beam Carry formed frame to which a wooden panel composed of individual pieces is attached is against which the inner membrane container rests.

In a known tank of this type (British patent specification 1,145,785), in which, however, the inner container is not designed like a membrane, but is also formed by strong plates, lie the crossing bars of the frame on top of each other, i.e. they do not close in a joint Level down, and the wooden plate is formed by boards that run diagonally to the support beams.

These boards interlock laterally with tongue and groove and are nailed to the beam, however, they butt against each other at the front. The thermal insulation must be almost exclusively applied by the insulating material placed in the spaces between the lattice framework will. On the other hand, however, it becomes this Isolieraiaieriai with to support the inner container or to transfer the exerted by the inner container

ίο Supporting forces on the external container with used: As a result, the selection of the insulating material is made; accordingly pressure-resistant and usually expensive insulating materials limited. On the other hand, the sealing of the space occupied by the wall is practical

is taken over exclusively from the inner container. If the inner container leaks, it will fill up Space taken up by the wall up to the outer container largely with leakage fluid, without that this liquid is still sufficiently thermally insulated.

is.

It has therefore proven necessary to have a second sealing layer or retaining wall inside Area of the thermal insulation wall to be provided to take off The liquid flowing out of the inner container is shielded from the outside to such an extent that they weiterern.η remains sufficiently isolated. This second stowage wall has so far been resistant to low temperatures like to manufacture metal, which has significantly increased the manufacturing costs of the tank.

The invention has for a TaM-der initially described type to make the inner container supporting parts so that ear, ·. Loading of the insulating material placed in the gaps improves thermal insulation.

an increased absorption capacity of inside ken and an additional seal against aus ·· ,,, Mending leakage fluid to the simplest possible i inexpensive way is achieved.

According to the invention, this object is above all

solved by dai? the Ba! ken with their directed towards the inner membrane container Surfaces lie in one plane and that the wooden plate is made up of rectangular pieces existing outer and inner layer is built up, with the connection points between the pieces of the two layers lie on the joists of the frame and the joints in the outer one Layer are offset from the junctions of the inner layer.

An improvement in the support and a first sealing effect are achieved by that the pieces of the outer layer of the wood panel on its entire circumference on the in one The bar at the end of the level comes to the plant.

The inner pieces of wood are arranged laterally offset to the outer ones, and also where they are If edge parts or connection points from the inner layer and the outer layer cross, this lies Crossing point again above a bar. From the inside of the wooden board to the outside there are therefore only relatively long and multiply diverted connection paths that arise can be reliably sealed without much effort. This wooden panel thus forms a complete second sealing wall, which rests directly on the inner container and optionally from the inner container keeps escaping leakage fluid away from the outer space of the heat insulating wall.

This special design of the wooden panel also results in a significantly improved support, since all Supporting forces passed on via the beams of the frame through the supports directly into the outer container will. The insulating material housed in the gaps is completely covered by the pressure relieved and can only be selected from the point of view of thermal insulation properties which, given the given dimensions, usually improve the thermal insulation brings with it. It is also the chosen type of construction relatively simple, since you have individual pieces of wood used, which can have limited dimensions and are therefore available inexpensively. In addition it is avoided to introduce a separate sealing or retaining wall, which in turn is in inserted into the support between the inner container and the outer container in a relatively complicated manner would have to be. In addition, the inner container can be formed by a relatively thin membrane because it is supported tightly and tightly over its entire surface.

Since the wooden plate, the frame and the supports can all be made of wood, the Has low conductivity, the supporting structure alone provides comparatively great thermal insulation.

According to a preferred embodiment of the invention, the outer and inner layers are Wood panel as well as the individual pieces of these layers are firmly glued together, making the seal just as improved as the load-bearing capacity. This can cause stresses caused by temperature fluctuations caused by shear stresses at the interface between the two layers be absorbed and balanced without affecting the seal.

It is also useful to make the bars of the frame of different thicknesses and the supports to connect via connecting plates to the thicker beams in places where the thinner beams cross the thicker bars. In this way, with a limited amount of materials, a largely uniform support achieved on the entire contact surface of the structure. The connecting plates distribute the loads exerted on the thicker beams and prevent the Press the supports into the thicker beams.

Finally, according to the invention, it is also proposed that the supports be on the wall of the outer container to be attached by means of U-shaped components. In this way, the outer container can once at the Support point are reinforced, with the support ends transverse to the longitudinal direction of the rail through the flanges of the rails and aligned in the longitudinal direction of the rails by the aforementioned connecting plates and are held.

Further features and advantages of the invention are intended to be taken from the following description of a preferred one Embodiment will be explained with reference to the drawing. It shows

F i g. 1 is a perspective view of the basic construction of the heat insulating wall according to FIG an embodiment of the tank according to the invention,

F i g. FIG. 2 shows a partial side view of the basic construction of the heat-insulating wall, partly in section, along the line AA in FIG. 1 and

F i g. Fig. 3 is an explanatory plan view of a wood panel converted into heat-insulating according to the invention Wall is built in.

On the in Fig.! The basic construction of the heat-insulating wall shown is called heat-insulating Material a layered wooden board, which serves as a second damming body, and one through a membrane formed inner container 9 applied. On the inside of a rigid outer container 1 is a

ίο steel plate! attached, on which a large number of or U-shaped components 3 are welded parallel to one another. A variety of supports 4 are through Screws and nuts with their outer (lower in FIG. 1) end on the U-shaped components

attached and stand side by side on the wall of the rigid outer container 1 of the tank.

Ends (1 g in the upper F i.) To the inner of the supports 4, a wooden frame is attached, the α of thicker and thinner bar 6 bar 6 is formed b, which are joined together to form a lattice frame. The intersections of the lattice frame are arranged exactly above the supports 4. The thicker bars 6 a are attached to the head parts of the supports 4 with plywood connecting plates 7 by glue and nails.

The top surface of the thicker bar 6a is connected to the top surface of the thinner beams 6fe made flush, so that the top surface of the frame 6, for BehäUerinneren directed towards the surface, can form a smooth single plane. On this top surface of the frame 6, as in FIG. 2, a layered wood panel 8 composed of an outer layer 8 α and an inner layer 8 fc is applied. The outer and inner layers 8 a, 8 b are each made of plywood. As clearly shown in FIG. 2, the membrane that forms the inner container 9 covers the inner layer 8 b of the laminated wood panel 8.

The outer layer 8 a of the layered wood panel 8 is on the top surface of the frame 6 and the inner layer 8 b attached to the outer layer 8 a with the aid of adhesives and nails. The nails cause the interlayered adhesives to be pressed together for better setting and reinforcing the supporting structure.

The outer layer 8 α and the inner layer 8 b of the layered wood panel 8, each consisting of a number of rectangular wood panels, are arranged so that the connection points of the corresponding layers come to lie on the beams of the frame 6 and that the connection points of the outer layer 8a, as shown in Fig. 3, are offset to the connection points of the inner layer 8b. As a result, the laminated wood plate 8 as a whole has no joints extending from the inside to the outside.

In the space between the supports and between the layered wood panel 8 and the rigid outer container 1 is created, is suitable

6 <* nes heat-insulating material such as perlite powder filled.

Although a certain preferred embodiment of the invention has been particularly pointed out above and has been explained, this embodiment can easily be modified by those skilled in the art. They are different additional changes in the arrangement and construction of the individual components are possible, without leaving the scope of the invention.

For example, here is a steel plate! welded onto the surface of the U-shaped components 3, to protect the heat-insulating wall from moisture if the wall construction is erected outdoors will. However, the steel plate can also be omitted if the wall construction is erected directly in the outer rigid container.

Furthermore, it is obvious that the lattice frame and the supports in the embodiment described above can be reinforced by additional supports and the like.

1 sheet of drawings

Claims (4)

Patent claims: 1. Tank for storing low-boiling liquefied gases with a rigid outer container, an inner membrane container and a lattice framework made of wood, which is arranged between the two containers, the spaces between which are filled with insulating material and which has pieces attached to the outer container, which are attached to their upper ones The ends carry a frame formed from beams, to which a wooden plate composed of individual pieces is attached, on which the inner membrane container rests, characterized in that the beams (6 a, 6 b) forming the frame (6) with their to the inner membrane container (9) facing surfaces in one plane and that the wooden board (8) is constructed from an outer and inner layer (8 a, 86) each consisting of rectangular pieces, the connecting points between the pieces of the two layers (8 α, 8 b) lie on the bars (6 a, 6 b) of the frame (6) and the connection points in the outer layer ( 8 a) are offset from those in the inner layer (8 b). 2. Tank according to claim 1, characterized in that the outer and the inner layer (8 a, Sb) of the wooden plate (8) are firmly glued together. 3. Tank according to claim 1, characterized in that the bars (6 a, 6 b) of the frame (6) of different thicknesses and the supports (4) via connecting plates (7) with the thicker bars (6 α) are connected at points , where the thinner bars (6 b) cross the thicker bars (6 α). 4. Tank according to claim 1, characterized in that the supports (4) on the wall of the outer container (1) are attached by means of U-shaped components (3).