Fire protection cabinet, fire protection device and thermal separation element

Abstract

A fire protection cabinet (1), a fire protection device (2) for it, a thermal break element (5, 50) for this fire protection device (2), and a method are shown. To create a fast-acting thermal break element (5, 50), it is proposed that the base body (7) has at least one hook-shaped first base body section (8) with the point or area of ​​application (P) for hooking the connecting element (6), wherein the first base body section (8) is designed to be deformable, at least in sections, under the heat load (H1, H2) and under the force load (F) in order to allow a movement, in particular at least a rotational movement, that disengages the connecting element (6) and triggers the protective function on the fire protection device (2).

Description

[0001] The invention relates to a fire protection cabinet, a fire protection device therefor, and a thermal break element for this fire protection device, comprising a base body having a point or area of ​​attack, in particular made of plastic, wherein the base body is designed to be deformable under heat stress and under force stress, in particular tensile and / or compressive stress, acting at its point or area of ​​attack of a connecting element, in particular a pin, of the fire protection device, in order to trigger a protective function on the fire protection device.

[0002] Various release mechanisms for closing an opening in a fire protection device are known from the prior art (DE102019002428A1). For example, thermomechanical release mechanisms have a solder-based thermal break element consisting of two base bodies connected by a fusible link. In the event of a fire, these bodies separate, thereby activating the fire protection device to close an opening. Thermomechanical release mechanisms with a plastic-based thermal break element are also known. This thermal break element activates the fire protection device through longitudinal deformation of its base body by causing it to elongate under heat stress and under tensile stress at its point or area of ​​application by a connecting element, such as a cable, intended for the mechanical actuation of the fire protection device.To achieve sufficient elongation of the base body, a uniform heating of the base body and comparatively high tensile forces are required, which can negatively affect the reaction time of the triggering mechanism. Furthermore, the positioning of the thermal break element within an airflow carrying fire-related heat also plays a functionally relevant role, which adversely complicates the design of the triggering mechanism.

[0003] The invention therefore aims to constructively modify a thermal break element of the type described above with a base body, in particular made of plastic, in such a way that it triggers quickly and can be used universally in a wide variety of fire protection devices.

[0004] The invention solves the problem stated with regard to the thermal separator by the features of claim 1.

[0005] If the base body has at least one hook-shaped first base body section with the point or area of ​​application for hooking the connecting element, wherein the first base body section is designed to be deformable at least partially under heat stress and force stress, a section on the base body can be created that can be used for the more reliable activation of a release mechanism.

[0006] The first section of the base body can enable a movement that disengages the connecting element of the fire protection device, thereby triggering the protective function of the fire protection device. Unlike the prior art, this eliminates the need for significant elongation of the base body – it is sufficient for the hook-shaped first section to deform in order to fulfill this safety-relevant function. This reaction is also rapid because the hook-shaped first section can respond relatively quickly to a fire temperature.

[0007] The movement is, for example, at least rotational, in order to improve the responsiveness of the safety-relevant function. Furthermore, the first basic body section can be rheologically shaped under thermal and force stress, for example, viscoelastic, plastic, and / or viscoplastic. Thus, depending on the temperature, a transition from viscoelastic to plastic or viscoplastic deformation can occur.

[0008] Furthermore, the disengaging movement allows for a compact design of the thermal break element, simplifying integration with the release mechanism and thus reducing its design requirements. This results in a highly responsive thermal break element with versatile applications.

[0009] Preferably, the first basic body section is at least partially bendable, buckling and / or shear-deformable in order to make the disengaging movement more reproducible.

[0010] If the first basic body section has a hook shaft and a hook head adjoining the hook shaft, which is inclined to the hook shaft, for example horizontally, at the point or area of ​​application, this can, for example, further increase the reliability of the activation of the triggering mechanism. Furthermore, this design of the first basic body section can result in a compact thermal break element. Preferably, the hook head has a recess at the point or area of ​​application.

[0011] For example, the point or area of ​​attack is located at the base of the hook of the first main body section. This allows, for example, a safety-relevant function to be triggered more quickly.

[0012] Preferably, the base body has a material recess penetrating it in order to further improve the reaction speed of the thermal separator.

[0013] The above can be further improved if the material recess extends at least partially transversely to the longitudinal direction of the base body. Preferably, the material recess can have a curved profile at least partially to ensure a more effective disengaging movement.

[0014] Preferably, the material recess on the base body forms a slotted eyelet, which can, for example, further facilitate the handling of the thermal break element. If this eyelet is oval, this can further simplify assembly, especially if the eyelet is inversely oval.

[0015] It is conceivable that the basic body has at least a second basic body section, to which the first basic body section, viewed particularly in the longitudinal direction of the basic body, for example tapers towards the second basic body section.

[0016] The design of the thermal break element can be further simplified if the base body has a plate or foil shape. In particular, the base body is elongated.

[0017] The thermal break can be enhanced with an activation feature if it includes a heating element, particularly an electric one, located on the first section of the base body. For improved response speed, the electric heating element can, for example, be positioned on the hook shaft.

[0018] Unhooking can be facilitated, for example, if the unhooking movement includes at least a rotational movement transverse to the longitudinal and lateral directions of the first base body section. This is especially true if the movement is essentially a rotational movement transverse to the longitudinal and lateral directions of the first base body section.

[0019] For safety-relevant functions, it can be advantageous if the base material is made of PET. For example, amorphous PET (PET-A) or semi-crystalline PET can be suitable.

[0020] The thermal break element according to the invention is preferably suitable for a release mechanism of a fire protection device, in particular a fire damper, wherein the release mechanism has a connecting element mechanically connected to the thermal break element.

[0021] For example, the fire protection device may have a flap that bears a load on the connecting element or on the thermal break element in order to subject the thermal break element to tension and / or compression.

[0022] The thermal break element or fire protection device may, for example, be suitable for use in a fireproof cabinet.

[0023] The invention also aims to create a method by which a protective function can be reliably triggered on a fire protection device.

[0024] The invention solves the problem stated with regard to the method by the features of claim 17.

[0025] A protective function on a fire protection device can be reliably triggered if a thermal break element or a fire protection device or a fire protection cabinet according to the invention is used.

[0026] Preferably, when subjected to heat from fire and / or from a heating element, particularly an electric one, a hook-shaped first base body section of the thermal separator performs a movement, particularly at least a rotational movement, which unhooks a force load onto a point or area of ​​application of the first base body section in order to trigger the protective function.

[0027] The figures illustrate the invention in more detail by means of several exemplary embodiments. They show... Fig. 1 a front view of a partially shown fireproof cabinet, Fig. 1a an enlarged partially opened view of the Fig. 1 , Fig. 2 a front view of a thermal break element of the fire protection cabinet according to Fig. 1 und 1a According to a first embodiment, Fig. 3 shows a side view of the Fig. 2 The thermal break element shown in Fig. 4a is a front view of the thermal break element. Fig. 2 in the state activated by fire heat, Fig. 4 leg front view of the thermal break element according to Fig. 2 in the state activated by an electric heating element, Fig. 5 a front view of a thermal break element of the fire protection cabinet according to Fig. 1 according to a second embodiment and Fig. 6 a front view of the thermal break element according to Fig. 5 in a state activated by fire heat and an electric heating element.

[0028] After Fig. 1 A fire-resistant cabinet 1 with a fire protection device 2 is shown. The details are as follows: Fig. 2 The illustrated fire protection device 2 has a flap 3 and a thermomechanical release mechanism 4 with a thermal break element 5 and a connecting element 6, namely a pin, for the mechanical actuation of the fire protection device 2. Other versions of the connecting element 6 are conceivable, for example as a rope, rod, connecting rod, etc. There is a loose connection between the connecting element 6 and the thermal break element 5.

[0029] According to the first embodiment, the connecting element 6 is part of the mechanism provided for actuating the fire protection device 2. For this purpose, the connecting element 6 is attached to the flap 3. Thus, the weight of the flap 3 is transferred via the connecting element 6 to the point of application P of the thermal break element 5, thereby subjecting the thermal break element 5 to a force F, namely a compressive force. If the thermal break element 5 is triggered in the event of a fire, the flap 3 closes an opening 1a of the fire protection cabinet 1, for example, an opening intended for ventilation purposes, by falling downwards.

[0030] To fulfill this protective function, the [document / section] points to the [document / section] according to the [document / section]. Figuren 3 and 4a, 4b The thermal separating element 5 shown in detail has a base body 7 made of plastic, which is designed to be deformable under heat stress H1 and force stress F caused, for example, by a fire, namely fire heat.

[0031] According to the invention, this protective function on the fire protection device 2 is triggered rapidly in a compact design. For this purpose, the base body 7 of the thermal break element 5 has a hook-shaped first base body section 8. The point of application P, where the force F, namely compressive force, acts, is located on the first base body section 8. Under heat stress H1 and force stress F, the first base body section 8 is designed to be deformable in sections in such a way as to enable a movement B that disengages the connecting element 6 and triggers the protective function on the fire protection device 2. This movement B is at least rotational, as shown in Fig. 4a can be seen, namely perpendicular to the longitudinal direction L and the width direction B of the first basic body section 8, around an axis of rotation R (in the Z direction), which is to be considered as the instantaneous axis of rotation R due to a plastic-rheological behavior.

[0032] This movement B also exhibits a translational component caused by stretching or elongation of the first basic body section 8, although this is not mandatory. A rotational movement with superimposed rotation is also conceivable, for example, if the first basic body section 8 also deforms in a rotational manner around the lateral direction B.

[0033] The first basic body section 8 is capable of bending and shearing in sections to perform rotational and translational movements. A buckling motion is also conceivable for this unhooking, but this has not been shown.

[0034] In the exemplary embodiment, the free end 8a of the first base body section 8 moves completely away from under the connecting element 6. The connecting element 6, which exerts a downward vertical force, forces at least a portion of the first base body section 8 to undergo this rotational and, if applicable, translational movement B. The connecting element 6 thus loses its hold on the thermal break element 5, causing the flap 3 to fall downwards and close the opening 1a of the fire-resistant cabinet 1.

[0035] In the exemplary embodiment, the base body 7 consists of a PET plastic (polyethylene terephthalate plastic), namely PET-A. The base body 7 is thus designed to be particularly quickly deformable from a plastic rheological perspective, which ensures rapid unhooking.

[0036] As also in the Figuren 4a und 4b To recognize, a movement B of at least the hook head 11 of the first basic body section 8 is enabled, which releases the force load F on the point of application P or area.

[0037] Furthermore, the point or area of ​​attack P is located at the base of the hook 8b of the first base body section 8, which positions the connecting element 6 securely and thus ensures the function of the thermal separator 5.

[0038] Thus, the hook-shaped first basic body section 8 consists of, as in Fig. 2 The hook is shown in detail as consisting of a hook shaft 10 and a hook head 11 adjoining the hook shaft 10, which forms the free end 8a of the base body section 8. Furthermore, the hook head 11 has the point of application P and a recess S at this point. The connecting element 6 rests reliably in this recess S. In addition, the hook head 11 is inclined to the hook shaft 10, namely horizontally, in order to be able to stably absorb the mechanical load of the connecting element 6.

[0039] This stable mounting of the connecting element 6 is also achieved by a specially shaped material recess 12 on the base body 7, which penetrates it. This material recess 12 extends, at least in some areas, transversely to the longitudinal direction L of the base body 7 (i.e., in the width direction B of the base body 7), resulting in a slot 13a between the first base body section 8 and a second base body section 9 of the two base body sections 8 and 9 of the base body 7. Furthermore, the material recess 12 is curved, at least in some areas, resulting in a slotted eyelet 13 along its course due to the slot 13a. This eyelet 13 is also inversely oval when viewed in the direction of the force F, which facilitates the assembly of the connecting element 6, to which the flap 3 is suspended.

[0040] As also in Fig. 2 As can be seen, the second base body section 9 connects directly to the first base body section 8 in the longitudinal direction L of the base body 7. Specifically, the hook shaft 10 connects directly to this second base body section 9, which also tapers relative to this second base body section 9. Therefore, even a small heat load H1 can be sufficient to trigger the protective function quickly.

[0041] Furthermore, the base body 7 has an elongated plate shape in which a penetrating material recess 12 is provided, as shown in Fig. 3 to recognize. However, it is also conceivable that the basic body 7 has an elongated foil shape.

[0042] Furthermore, in Fig. 2 An electric heating element 15 can be identified, which can also trigger the disengaging movement B. The electric heating element 15 can be, for example, a coil-wound resistance wire, heating resistor, etc. The first base body section 8 is subjected to a heat load H2 via the electric heating element 15. For this purpose, a current I is passed through the electric heating element 15. The thermal disconnect 5 can thus also be triggered electrically, the triggered state of which is Fig. 4b can be seen.

[0043] Fig. 5 shows an alternative design to the one described above. Fig. 2 The thermal break element 5 shown in the illustration. This thermal break element 50 also uses a hook-shaped first base section 8 to close a flap 3 (not shown) on the fire protection cabinet 1 in the event of a fire. Unlike the thermal break element 5, the force F in this thermal break element 50 is opposite to the weight of the flap 3. The flap 3 is rigidly connected to the thermal break element 50. The connecting element 6 is fixed in place, and the thermal break element 50 is suspended from the connecting element 6. There is a loose connection between the connecting element 6 and the thermal break element 5.

[0044] In this second embodiment, the thermal separating element 50 is therefore not part of the mechanism provided for the mechanical actuation of the fire protection device 2 (and thus the actuation of the flap 3).

[0045] Under heat stress H1 (fire heat) and / or H2 (heat from activated / energized electric heating element 15), the first basic body section 8 performs an upward unhooking movement B, thus detaching itself from the connecting element 6, namely the pin, as shown in Fig. 6 to recognize. This triggers the protective function on the fire protection device 2; for example, the flap 3 closes the opening 1a in the fire protection cabinet 1.

[0046] It is generally accepted that "in particular" can be translated into English as "more particularly". A feature preceded by "in particular" is to be considered an optional feature that can be omitted and therefore does not represent a limitation, for example, of claims. The same applies to "preferably", which is translated into English as "preferably".

Claims

1. Thermal break element for a fire protection device (2) with a base body (7) having an attack point or area (P), in particular made of plastic, wherein the base body (7) is designed to be deformable under heat stress (H1, H2) and under force stress (F) acting at its attack point or area (P), in particular tensile and / or compressive stress, of a connecting element (6), in particular a pin, of the fire protection device (2) in order to trigger a protective function on the fire protection device (2), characterized by the fact thatthe base body (7) has at least one hook-shaped first base body section (8) with the point or area of ​​application (P) for hooking the connecting element (6), wherein the first base body section (8) is designed to be deformable at least in sections, in particular rheologically, under the heat load (H1, H2) and under the force load (F) in order to enable a movement, in particular at least a rotational movement, that unhooks the connecting element (6) to trigger the protective function on the fire protection device (2).

2. Thermal break element according to claim 1, characterized by the fact that the first basic body section (8) is at least sectionally bendable, buckling and / or shearable.

3. Thermal break element according to one of claims 1 to 2, characterized by the fact thatthe first basic body section (8) has a hook shaft (10) and a hook head (11) adjoining the hook shaft (10), which is inclined to the hook shaft (10), in particular horizontally, and has the point or area of ​​attack (P), in particular in a depression (S).

4. Thermal break element according to one of claims 1 to 3, characterized by the fact that the point or area of ​​attack (P) is located at the base of the hook (8b) of the first basic body section (8).

5. Thermal break element according to one of claims 1 to 4, characterized by the fact that the base body (7) has a material recess (12) penetrating it.

6. Thermal break element according to claim 5, characterized by the fact that the material recess (12) extends at least partially transversely to the longitudinal direction (L) of the base body (7) and / or the material recess (12) has a curved profile at least partially.

7. Thermal break element according to one of claims 5 to 6, characterized by the fact thatthe material recess (12) on the base body (7) forms a slotted, in particular inversely oval, eyelet (13).

8. Thermal break according to one of claims 1 to 7, characterized by the fact that the base body (7) has at least a second base body section (9) to which the first base body section (8) is connected, in particular in the longitudinal direction (L) of the base body (7), for example tapering towards the second base body section (9).

9. Thermal break element according to claim 8, characterized by the fact that the material recess (12) is bounded by the first and second basic body sections (8, 9).

10. Thermal break according to one of claims 1 to 9, characterized by the fact that the base body (7) has a plate or foil shape, in particular an elongated shape.

11. Thermal break element according to one of claims 1 to 10, characterized by the fact thatthe thermal separator (5, 50) has a heating element (15), in particular an electrical one, which is provided on the first base body section (8), in particular on the hook shaft (10).

12. Thermal break element according to one of claims 1 to 11, characterized by the fact that the unhooking movement exhibits at least a rotational movement transverse to the longitudinal direction (L) and the width direction (B) of the first basic body section (8).

13. Thermal break element according to one of claims 1 to 12, characterized by the fact that the base body (7) consisting of, in particular, amorphous or semi-crystalline, PET consists.

14. Fire protection device, in particular fire damper, with a release mechanism comprising the thermal separator (5, 50) according to one of claims 1 to 13, which has a connecting element (6) mechanically connected to the thermal separator (5, 50).

15. Fire protection device according to claim 14, characterized by the fact thatthe fire protection device has a flap (3) which is loaded on the connecting element (6) or on the thermal separator (5, 50).

16. Fire protection cabinet with a thermal break (5, 15) according to one of claims 1 to 13 or with a fire protection device (2) according to one of claims 14 to 15.

17. Method for triggering a protective function on a fire protection device (2) with a thermal break element (5, 50) according to one of claims 1 to 13 or with a fire protection device (2) according to one of claims 14 to 15 or with a fire protection cabinet (1) according to claim 16.

18. Method according to claim 17, characterized by the fact thatIn the event of a heat load (H1, H2) caused by fire heat and / or by a heating element (5), in particular an electric one, a hook-shaped first basic body section (8) of the thermal separator (5, 50) performs a movement that unhooks the connecting element (6), in particular at least a rotational movement, in order to trigger the protective function on the fire protection device (2).

Images