Safety control cabinet

Abstract

A safety switch cabinet comprising a base element (1), two side wall elements (2), a rear wall element (3), a head element (4), and a door element (5), wherein a frame (20) is accommodated in the safety switch cabinet and is fixed to the base element (1), wherein the side wall elements (2) are rigidly connected to the frame (20) via at least one fastening bracket (6), characterized in that the head element (4) and the rear wall element (3) are fixed to the side wall elements (2), and the door element (5) is hinged directly to one of the side wall elements (2).

Description

The invention relates to a safety switch cabinet having a base element, two side wall elements, a rear wall element, a head element and a door element, wherein a framework is accommodated in the safety switch cabinet, said framework being fixed on the base element, wherein the side wall elements are rigidly connected to the framework via in each case at least one fastening angle. Such a safety switch cabinet is known from WO 2004 / 088 805 A2. Similar devices are known from DE 199 14 408 A1, DE 23 57 633 A1, U.S. Pat. No. 3,566,541 A and EP 1 135 573 B1.DE 10 2010 048 503 A1 describes an equipment cabinet with an earthquake reinforcement.The known safety switch cabinets have the disadvantage that certain minimum requirements are imposed on the mechanical stability of the floor element, the side wall elements, the rear wall element, the head element and the door element. This is related to the fact that the aforementioned elements, beyond their actual function of protecting the interior of the safety cabinet from excessive heat exposure in the event of a fire, are designed to provide the load-bearing structure of the safety cabinet. This has the consequence that the aforementioned elements of the safety switch cabinet are either quite expensively designed as composite materials of a fire protection material and further materials, or can be manufactured only from such fire protection materials which, from the home, bring with them the required mechanical stability.In the safety cabinet known from EP 1 135 573 B1, the above-mentioned elements are stabilized against one another with the aid of frames, to which they are fixed via frame elements. A similar safety cabinet is also known from DE 10 2009 008 059 A1.It is therefore the object of the invention to propose a safety cabinet of the generic type in which fire protection materials can also be used for the production of the base element, the side wall elements, the rear wall element, the head element and the door element, which fire protection materials meet lower requirements with respect to the mechanical strength in comparison with the materials used in the known safety cabinets, so that in particular lighter fire protection materials can also be installed.This object is achieved by a safety switch cabinet according to claim 1. According to the invention, the safety cabinet is characterized in that the head element and the rear wall element are fixed to the side wall elements and the door element is directly hinged to one of the side wall elements.The invention thus makes use of the structural rigidity of the framework which is already present in generic safety switch cabinets and is accommodated by the safety switch cabinet. The structural rigidity of the safety switch cabinet according to the invention is thus no longer due to the strength of the interconnected aforementioned elements of the cabinet, but rather in the framework. This makes it possible for the design of the floor element, the side wall elements, the rear wall element, the head element and the door element to be able to take place exclusively according to the respective requirements with regard to fire protection. Thus, in particular, less rigid and lighter refractory materials, such as mineral wool, can also be used.The framework is preferably cuboidal, the outer edges of which are formed by four vertical profiles and eight horizontal profiles. Four of these profiles then form a fastening plane which is oriented parallel to one of the floor element, side elements, rear wall element, head element and door element.In the preferred embodiment, the rear wall element is a door hinged to one of the side wall elements, which can be pivoted between an open position and a closed position and can have the function of a service door. In its open position, this service door together with the door element, when it is likewise in its open position, then forms a straight passage through the interior of the safety switch cabinet, whereby the dismantling of the switch cabinet is substantially facilitated.The fastening angle can have, for example, two fastening sides angled relative to one another, wherein the fastening angle is connected to the framework via a first of the fastening sides and to one of the side wall elements via a second of the fastening sides.In principle, it can be provided according to the invention that the framework has a first fastening plane, which faces an inner side of a first of the two side wall elements, and a second fastening plane, which faces an inner side of a second of the two side wall elements, wherein the first and the second side wall element are connected indirectly or directly to the respective fastening plane via their respective inner side.In this case, the fastening planes can be formed by two vertical profiles and two horizontal profiles of the framework in each case.In principle, the fastening bracket has a first fastening side via which it is connected to the framework in one of the fastening planes, wherein the fastening bracket furthermore has a second fastening side via which it is connected to the inner side of that side wall element which is facing the fastening plane in which the fastening bracket is connected to the framework.Because no frame is necessary according to the invention for stabilizing the fire protection elements on the door side or sides of the safety switching cabinet, an embodiment is possible in which the door element and / or the rear wall element configured as a hinged door is hinged directly to one of the side wall elements, wherein the side wall elements, the base element and the head element form a door opening in which the door element or the rear wall element configured as a hinged door is accommodated in a closed position. In order to delay the heat effects on the interior of the switchgear cabinet in the event of a fire, it is provided in this embodiment that the side wall elements, the base element and the head element have passages at least in the regions in which they adjoin the narrow longitudinal and transverse sides of the door element or the hinged door in the closed position of the door element or the hinged door, so that a coolant accommodated in the side wall elements, the base element or the head element can be released through the passages in the event of a fire. Alternatively or additionally, the passages have the function of a heat passage interruption. In addition, it can be provided that further passages are formed at least partially on those surfaces of the side wall elements, of the base element and of the head element along which these adjoin one another in order to cool a sealing surface formed between these elements in the event of a fire and / or to suppress the penetration of heat through the sealing surfaces into the interior of the switchgear cabinet.In addition or as an alternative to the aforementioned embodiment, the side wall elements, the base element and the head element can have an intumescent sealing element at least in the regions in which they adjoin the narrow longitudinal and transverse sides of the door element in the closed position of the door element.Further details of the invention are explained with reference to the following figures. The following shows: FIG. 1 is an exploded view of the preferred embodiment; FIG. 2 shows a framework in the embodiment according to FIG. 1 ; FIG. 3 shows a detailed view of the framework according to FIG. 2 ; FIG. 4 shows a floor element with a frame mounted according to an embodiment according to FIGS. 1 and 2 ; FIG. 5 shows a side wall element and a detail view of the right upper corner of this of the embodiment according to the preceding figures; and FIG. 6 shows a detailed view of the door opening in the corner region of the embodiment according to the preceding figures.FIG. 1 shows the preferred embodiment of the safety switch cabinet according to the invention, with a base element 1, two side wall elements 2, a rear wall element 3, a head element 4 and a door element 5, which surround a framework 20. The framework 20 is preferably a framework established in the construction of switchgear cabinets, as is described, for example, in DE 196 47 723 C1, DE 195 36 950 C1 or DE 196 47 790 C2. For the mounting of the safety switch cabinet, the framework 20 can be screwed to the floor element 1 or otherwise fixed thereon in a first step. In a second step, the side wall elements 2 are placed on the floor element and rigidly connected to the framework 20. In order to ensure the stability of the completely assembled safety cabinet, it is sufficient that the remaining fire protection elements are fixed to the side walls in a conventional manner. This can be effected, for example, by means of screw connections or rivets. The fastening means should not be limited to any particular ones, as long as they are suitable for a force-fit connection of the cabinet elements. Because the framework gives the safety cabinet its stability according to the invention, the fastening means can frequently be chosen to be weaker than in the known cabinets.FIGS. 2 and 3 show that the connection between the side wall elements 2 and the framework 20 is preferably produced with the aid of fastening brackets 6 fastened to the vertical profiles of the framework 20. For this purpose, the fastening brackets 6 have two fastening sides angled relative to one another, of which one of the two fastening sides is connected to the framework 20 and a second of the fastening sides forms a contact surface, by means of which a side wall element can be fastened with its inner side to the fastening bracket 6. The fastening angles 6 extend in the present case over approximately the entire length of the vertical profiles. It has been found that it is already sufficient if the two side wall elements 2 are connected to the framework 20 via the fastening brackets 6 in order to provide a safety cabinet which has sufficient rigidity and stability. The remaining elements, i.e. the head element 4 and the rear wall element 3, are sufficiently fixed by fastening to the side wall elements. To further increase the stability of the safety switch cabinet according to the invention, however, it can be provided that these elements are also connected to the framework, for example using the fastening brackets 6 already described. FIG. 1 also shows that the right side wall 2 in the illustration is designed so that the door element can be attached to it in a hinged manner.FIG. 4 shows a detailed view of the floor element 1 on the door side of the safety cabinet. The floor element 1 has passages in the regions in which it adjoins the underside of the door element 5 in the closed position of the door element 5 (not shown), wherein a material is accommodated in the floor element 1, which material releases a coolant through the passages 7 in the event of a fire. The passages furthermore have the essential function of providing a heat passage interruption which, in the event of a fire, contributes to the heat transport into the interior of the cabinet being inhibited. In principle, all of the elements and in particular also the door element and / or a rear wall element possibly designed as a service door can be provided with such passages along their outer border, via which they adjoin the side wall elements, the base element and the head element in their closed position.Corresponding passages 7 are also present in the side wall element 2 according to FIG. 5 in those regions in which the side wall element 2 adjoins a door element or a rear wall element. The side wall element 2 further comprises hook angles 9, which comprise a vertical guide surface extending perpendicular to the inner side of the side wall element 2 and which, when the side wall element 2 is placed exactly on the base element 1, bear against corresponding outer or inner vertical surfaces of the frame profile 20 and thus have the function of a positioning aid. Alternatively, the hook angles can also be designed to hang the side wall element via the hook angles into any system perforation of the profiles of the framework for prepositioning the respective side wall element.FIG. 6 shows the door-side opening of the safety switch cabinet according to the invention in the region of the upper left corner. It can be seen that both the side wall element 2 and the head element 4 have an intumescent sealing element 8 in the regions in which they adjoin the narrow longitudinal and transverse sides of the door element in the closed position of the door element, which is not illustrated. When viewing FIGS. 5 and 6 together, it is evident that the intumescent sealing element 8 covers the apertures 7 in the side wall element 2. This ensures that the action of the material accommodated in the side wall element, which releases the coolant through the passages 7 in the event of a fire, begins with a delay, namely only when, despite the insulating action of the intumescent sealing element 8, the heat input to the switchgear cabinet has advanced to such an extent that the insulating action of the intumescent sealing element is diminished. A further intumescent sealing element 8.1 is present on a sealing surface of the door opening, which is arranged further to the safety gate compared to the aforementioned intumescent sealing element 8. The door opening of the safety cabinet is limited by a stop 10 which, in the closed position of the door element 5, bears against the inside of the door element 5. The stop 10 in turn has a sealing element which is designed to prevent the penetration of moisture into the interior of the safety cabinet. This sealing element can be made of sponge rubber, for example, and, unlike the one shown, is preferably formed circumferentially on the stop 10.List of reference characters1 Bottom element 2 Side wall elements 3 Rear wall element 4 Head element 5 Door element 6 Fastening bracket 7 Passage 8 Outer intumescent sealing element 8.1 Inner intumescent sealing element 9 Hook bracket 10 Stop 20 Framework

Claims

Safety switching cabinet, having a base element (1), two side wall elements (2), a rear wall element (3), a head element (4) and a door element (5), wherein a framework (20) is accommodated in the safety switching cabinet, said framework being fixed on the base element (1), wherein the side wall elements (2) are rigidly connected to the framework (20) via in each case at least one fastening bracket (6), characterized in that the head element (4) and the rear wall element (3) are fixed to the side wall elements (2) and the door element (5) is directly hinged to one of the side wall elements (2)Safety cabinet according to claim 1, wherein the rear wall element (3) is a door hinged to one of the side wall elements (2), which is pivotable between an open position and a closed position.Safety cabinet according to claim 1, wherein the mounting bracket (6) has two mounting sides angled towards each other, wherein the mounting bracket (6) is connected to the framework (20) via a first of the mounting sides and to one of the side wall elements (20) via a second of the mounting sides.Safety cabinet according to one of claims 1 to 3, wherein the framework (20) has a first fastening plane, which faces an inner side of a first of the two side wall elements (2), and a second fastening plane, which faces an inner side of a second of the two side wall elements (2), wherein the first and the second side wall element (2) are connected indirectly or directly to the respective fastening plane via their respective inner side.Safety cabinet according to claim 4, wherein the fastening planes are formed by two vertical profiles (21) and two horizontal profiles (22) of the framework (20).Safety cabinet according to claim 4 or 5, wherein the mounting bracket (6) has a first mounting side via which the mounting bracket (6) is connected to the framework (20) in one of the mounting planes, and wherein the mounting bracket (6) has a second mounting side via which the mounting bracket (6) is connected to the inner side of that side wall element (2) which is facing the mounting plane in which the mounting bracket (6) is connected to the framework (20).Safety cabinet according to claim 1, wherein the door element (5) is hinged to one of the side wall elements (2), wherein the side wall elements (2), the bottom element (1) and the head element (4) form a door opening in which the door element (5) is accommodated in a closed position, wherein the side wall elements (2), the bottom element (1) and the head element (4) have passages (7) at least in the regions in which they adjoin the narrow longitudinal and transverse sides of the door element (5) in the closed position of the door element (5), such that a coolant accommodated in the side wall elements (2), the bottom element (1) or the head element (4) can be released through the passages (7) in the event of a fire.Safety cabinet according to claim 7, wherein further passages (7) are formed at least partially on those surfaces of the side wall elements (2), the bottom element (1), the rear wall element (3) and the head element (4) along which they border each other.Safety cabinet according to claim 1, wherein the door element (5) is hinged to one of the side wall elements (2), wherein the side wall elements (2), the bottom element (1) and the head element (4) form a door opening in which the door element (5) is accommodated in a closed position, wherein the side wall elements (2), the bottom element (1) and the head element (4) have an intumescent sealing element (8) at least in the regions in which they adjoin the narrow longitudinal and transverse sides of the door element (5) in the closed position of the door element.

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