DE20202015U1 - Closure element for a sprinkler nozzle - Google Patents

Description

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Closing element for a sprinkler nozzle

The innovation relates to a closure element for a sprinkler nozzle according to the preamble of the first and ninth claims.

The closure element is suitable for sprinkler nozzles on fire extinguishing systems where a trigger element is arranged between the closure element and the nozzle and where the closure element is to be manufactured quickly, cost-effectively and easily.

Closing elements for nozzles in various forms have been known for a long time. For example, DE 26 39 245 C2 describes a fire extinguishing spray head for automatic fire extinguishing systems in which a temperature-dependent safety element is supported on a valve plate resting on the valve seat, whereby the valve plate is designed to be spring-loaded. The closing element has the function of closing the valve opening. The valve plate is pressed onto the nozzle opening by the trigger element, which is supported on an abutment. There are various ways of designing the valve plate to be spring-loaded. The spring-loading is important in the event that there are slight changes in the length of the safety element without it bursting due to these changes in length. These changes in length are compensated for by the spring effect of the valve plate. In the event that the safety link or trigger element is destroyed, the spring-elastic disc of the valve plate falls down or is thrown out, after which the extinguishing liquid flows through the no longer closed valve opening into the room to be extinguished.

The disadvantage of this solution is that the locking mechanism has to be assembled from several parts.

DE-US 127 03 459 describes a sprinkler nozzle whose ejection mechanism has a spring. This allows the ejection process to be controlled and a securing mechanism on the sprinkler body to be provided.

EP 0 701 842 B1 discloses a spray nozzle for atomizing water in fire protection systems, in which, after the pressure body bursts, a part of the closing bracket is opened and remains attached to the sprinkler nozzle, with another part being ejected into the room to be extinguished.

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All existing devices have the disadvantage that they have to be manufactured and assembled in a complicated manner from a large number of parts.

The aim of the innovation is therefore to develop a closure element that can be manufactured in a simple manner.

This problem is solved by an innovation according to the features of the first and ninth claims. Subclaims reflect advantageous embodiments of the innovation.

The solution found provides a closure element for a sprinkler nozzle, which is characterized in that the base body of the closure element, consisting of the closure element, an ejection bracket and bendable retaining tabs, consists of a single Îó part, on which a spring and a receiving disk for the trigger element are arranged if necessary.

The closure element is placed on the nozzle opening and closes it by a release element that extends into a hole in the receiving disc and is supported between the receiving disc and an abutment. Minor expansion of the release element can be compensated by the springs in the closure element. If the temperature exceeds a certain level, the release element bursts and the nozzle opening is released when the closure element falls off.

The closure element advantageously has a rotationally symmetrical, cylindrical shape, wherein a lower cylindrical body has a smaller diameter than an upper rotationally symmetrical, cylindrical body.

Furthermore, it is advantageous to arrange three retaining tabs at the same distance around the axis of rotation of the base body, so that the retaining tabs have an angle of 120 ° to each other.

It is also advantageous to arrange a two-part disc spring under the receiving disc, which has a hole for the release element.

It is extremely advantageous to produce the base body from metal using a deep-drawing process. One or more disc springs can then be easily inserted into the body produced in this way. The receiving disc inserted on top is held evenly by the retaining tabs that are then bent over.

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In another embodiment, it is advantageous to form the lower limit of the closure element not with a straight bottom but with a so-called ejection slope. This has the advantage that the sealing cone can be thrown out of the nozzle body in a directed manner. Such a closure can then be operated without an ejection bracket. A single, simple spring element can be arranged in it. However, it is also possible to arrange a two-part spring element and a receiving disk.

A further variant of the invention is to produce the closure element from a single spring-loaded, plate-shaped part with a curved base. An ejection bracket can be arranged on this spring-loaded, plate-shaped part as a closure element. However, the arrangement of this ejection bracket is not absolutely necessary for the function of the part.

The innovation is explained in more detail below using four figures and an example of implementation. The figures show:

Fully assembled closure element for installation in a sprinkler

Base body with ejection bracket

Main body with ejection bracket in top view

Main body in half-section view

Deep-drawn sealing cone with sloping bottom in section

Deep-drawn sealing cone with sloping bottom in view

Deep-drawn sealing cone with sloping bottom in top view

Spring element

Fully assembled locking element with sloping bottom and spring element without ejection bracket

fully assembled locking element with sloping base and with double spring and receiving disc

Spring element with ejection bracket in side view Spring element with ejection bracket in top view

figure 25 figure 1: 15 Figure figure 2: figure 3: figure 4: figure 5: figure 6: 20 Figure 7: figure 8th: figure 9: figure 10: 11: 12:

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Figure 1 shows the innovation in section, with the base body 7 of the closure element

I was completed in such a way that the ejection bracket 4 was bent over on the right-hand side of the figure. The retaining tabs 6 which hold two spring parts 2 on which a receiving disk 3 with a hole 5 is arranged are also bent over. The base body 7 of the closure element 1 was manufactured using the deep-drawing process. After being manufactured using the deep-drawing process, it initially has a lower cylindrical, rotationally symmetrical body 8 with a smaller diameter and a rotationally symmetrical, cylindrical body 9 with a larger diameter (Figure 4). Three retaining tabs 6 are arranged on the upper rotationally symmetrical, cylindrical body 9, which are at an angle of 120 ° to one another. The arrangement of these retaining tabs at an angle of 120 ° can be seen in Figure 3, which shows a view from above of the base body with its two cylindrical shapes 8, 9. The ejection bracket 4, which is arranged between two retaining tabs 6, is first bent over, as shown in Figures 2 and 3. After inserting the springs 2 and the receiving disc, the base body is closed by bending the retaining tabs 6.

Figures 5, 6 and 7 show a closure element 7 with bendable retaining tabs 6 and a lower and upper cylindrical part 8, 9, wherein the base is designed as an ejection slope 10. In this closure element 7, a resilient, springy part 11 with a curved base 12 can be arranged, which is shown in Figure 8, wherein Figure 9 shows an assembly of both parts.

Figure 10 shows the assembly of a closure element 7 with ejection slope 10 and a two-part spring 2, over which a receiving disk 3 is arranged.

Figures 11 and 12 show a closure element 7, which is designed as a resilient, spring-loaded part

I1 is designed with a curved bottom on which an ejection bracket 4 is arranged.

The innovation has resulted in a closure element for sprinkler nozzles that can be manufactured with little effort and functions reliably.

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List of reference symbols used

1 Closure 2 Feather 5 3 Recording disc 4 Ejection bracket 5 Hole for trigger element 6 Retaining tab 7 Locking element 10 8 Lower cylindrical body 9 Upper cylindrical body 10 Ejection angle 11 Spring element 12 Arched bottom

Claims (9)

1. Closure for a sprinkler nozzle, in which the trigger element is held between the closure and the nozzle, characterized in that the closure element ( 7 ) with bendable holding tabs ( 6 ) and optionally an ejection bracket ( 4 ), consisting of a single part in which at least one resilient part is arranged. 2. Closure element according to claim 1, characterized in that the closure element ( 1 ) has a rotationally symmetrical, cylindrical shape, wherein a lower cylindrical body ( 8 ) has a smaller diameter than an upper rotationally symmetrical body ( 9 ). 3. Closure element according to claims 1 and 2, characterized in that a spring ( 2 ) and a receiving disk ( 3 ) are arranged in the closure element ( 7 ). 4. Closure element according to claims 1 to 3, characterized in that three retaining tabs ( 6 ) are arranged at the same distance around the axis of rotation of the closure element ( 7 ) and are at an angle of 120° to one another. 5. Closure element according to claims 1 to 4, characterized in that a multi-part disc spring ( 2 ) is arranged under the receiving disc ( 4 ) with a hole ( 5 ) for the release element. 6. Closure element according to one of claims 1 to 5, consisting of a metal body which was produced by the deep-drawing process. 7. Closure element according to one of claims 1 to 6, characterized in that the lower boundary of the closure element ( 7 ) forms an ejection slope ( 10 ). 8. Closure for a sprinkler nozzle, in which the trigger element is held between the closure and the nozzle, characterized in that the closure element ( 7 ) represents a single resilient, springy part ( 11 ) with a curved bottom ( 12 ). 9. Closure element according to claim 8, characterized in that an ejection bracket ( 4 ) is arranged on the resilient part ( 11 ).