FI83988C - VAEGGELEMENT FOER SAEKERHETSBYGGVERK. - Google Patents

Description

1 83988

Wall element for safety structures. - Väggelement för säkerhetsbyggverk.

The invention relates to a wall element for security structures, in particular for the construction of safes, in which the element has two steel plates arranged in parallel and an intermediate reinforcement layer formed of hard granules, the spaces of which are filled with a hard-sealing joint and the steel plates.

Such wall elements need not only sufficient certainty against deformation attacks, e.g. by breaking, and separating attacks, e.g. by flame cutting or grooving, but also the lowest possible unladen weight in order to keep transport problems and static load when installed in buildings as low as possible.

DE-AS 15 84 284 discloses an armor plate formed of a steel cladding and a filling arranged inside it, which in turn is formed of tightly packed, irregularly shaped granules of abrasion-resistant material, the spaces of which are filled with brazing compound. As the abrasion resistant material, titanium carbide, zirconium carbide, hafnium carbide, vanadium carbide, niobicarbide, tantalum carbide, chromium carbide, molybdenum carbide, thorium carbide, thorium carbide, uranium carbide, plutonium carbide, wolf, This armor plate has not found practical applications because it does not provide sufficient security against thermal attacks. A secure armor plate against separating attacks by cutting discs or crown drills is known from DE 83 OS 28 19 578, which plate is formed of a hard cast plate protected by steel or iron wires and a layer of thermosetting boron carbide bodies embedded in it, but not attacks. Finally, reference is made to DE-OS 27 30 284, which discloses an armor plate in which an insulating layer made of asbestos, non-fibrous or ceramic fiber board, a sheet-like metal-ceramic layer, a plastic, cork or ceramic layer is attached to the outer layer of austenitic steel. , an elastomeric layer embedded with small elements formed of alumina or boron carbide, an adhesive layer joining the next sheet-like layer of aluminum or fiberglass-reinforced plastic of the elastomeric layer, and a lattice structure layer of special profile steel. In addition to the fact that the manufacture of such an armor plate is considerably expensive, its wall thickness of 130 mm does not meet the requirement of the smallest possible wall thickness.

The object of the present invention is to develop a construction of a wall element such as that mentioned in the introduction, so as to compromise, on the one hand, sufficient security against deformable and all distinguishing attacks and, on the other hand, to achieve the lowest possible dead weight and wall thickness.

This object is solved according to the invention in that the reinforcement layer is formed of 30 to 70% by volume of non-metallic solids, the remainder being brazing mass.

In a preferred embodiment of the invention, it is arranged that the reinforcing layer is formed of 30 to 50% by volume of non-metallic hard material, the remainder being brazing mass.

I; 3,83988

The non-metallic hardener has a grain size between 5-20 mm, preferably 5-12 mm.

In order to ensure a material-tight connection between brazing mass and steel sheets as well as metallic brazing materials and to ensure that non-metallic brazing materials are firmly bound to brazing mass, copper and nickel-based brazing products are used singly or as a mixture of at least one copper-based nickel-based solder have proven to be particularly advantageous. Copper-based solders include CuZn, CuNiZn, CuP, Cu and CuSn solders. Nickel-based solders consist of mixtures of NiCrSi, NiBSi, NiCrSiB, NiCrP, NiP and NiMnSi. The exact composition of these brazes is given in DIN 8513.

The invention will now be described in more detail by way of example with reference to the accompanying drawing, which shows a mixture arranged between steel plates 5, 6 with 12% by volume of hard casting 7, 30% by volume of ceramic 8, 30% by volume of copper solder and 28% by volume of NiCrBS. brazing solder 9. The brazing mass forms a material-enclosed joint with metallic solids and steel sheets and completely surrounds the non-metallic brazing granules.

The advantages provided by the invention consist in particular in that the wall element is secure against attacks by fire cutting, cutting time, drilling and shattering. Hard materials form on cutting discs or drills. .. considerable resistance. The proportion of non-metallic hardeners, in turn, provides particular resistance to flame cutting. A particular advantage is that the wall element formed according to the invention is relatively thin-walled, i.e. its wall thickness is easily 20-50 mm.

Claims (5)

A wall element for security constructions, especially for the construction of safes, which element has two mutually arranged frame plates and a reinforcing layer located therebetween formed by hardening beads, the spaces of which are filled with a brazing bead, which binds and binds to each other. characterized in that the reinforcing layer consists of 30 - 70% by volume of non-metallic hardener, while the remainder consists of core solder. Wall element according to claim 1, characterized in that the reinforcing layer consists of 30 - 50% by volume of non-metallic curing agent, while the rest consists of curing solder. Wall element according to claim 1 or 2, characterized in that the grain size of the non-metallic hardening materials is between 5-20 mm, most preferably 5-12 mm, 4. A wall element according to any one of claims 1-3, characterized in that the core solder layer of the reinforcing layer consists of at least one copper or nickel based solder according to DIN standard 8513. Wall element according to any one of claims 1-3, characterized in that the core solder layer of the reinforcing layer consists of at least one copper and nickel based solder according to DIN standard 8513.