ES2853493T3 - Extinguishing system with simplified structure - Google Patents

Abstract

Extinguishing system (100) with at least one extinguishing agent container (10), to which at least one extinguishing agent conduit (11) is connected, and in which at least one extinguishing agent nozzle (12) is provided, which is connected to the extinguishing agent conduit (11), wherein, when the extinguishing agent container (10) is activated, the extinguishing agent (13) can be released from the extinguishing agent container (10) into the agent conduit extinguisher (11) and can be fed through the extinguishing agent conduit (11) to the extinguishing agent nozzle (12), and wherein the activation of the extinguishing agent container (10) can be activated by a pressure change in the extinguishing agent conduit (11), characterized in that the activation of the extinguishing agent container (10) can be caused by an increase in pressure in the extinguishing agent conduit (11), the extinguishing agent conduit (11) preferably being depressurized and / or emptied in the non-activated state, and n which at least one fire detector (14), preferably pneumatic action, is arranged in the extinguishing agent conduit (11), by means of which the pressure increase in the extinguishing agent conduit (11) can be generated, or wherein the activation of the extinguishing agent container (10) can be caused by a pressure drop in the extinguishing agent conduit (11), the extinguishing agent conduit (11) is placed under resting pressure in the non-activated state and It is placed under resting pressure with the extinguishing agent (13), and in that the extinguishing agent container (10) has an elastic expansion body (16) that can be expanded with a propellant (17) so that the extinguishing agent (13) can be released into the extinguishing agent conduit (11) through a change in shape of the expansion body (16), in which the extinguishing agent container (10) preferably houses a propellant cartridge (18 ) to release the propellant (17), the propellant cartridge (18) surrounded by the expansion body (16), and the extinguishing agent (13) being housed in the space between the expansion body (16) and the extinguishing agent container (10), in which The extinguishing agent container (10) has a connection head (19) to which the extinguishing agent conduit (11) can be connected and which is arranged to close the extinguishing agent container (10), the connection head (19 ) has an activation arrangement (20) which activates the propellant cartridge (18) in the event of a pressure change in the extinguishing agent conduit (11), the activation arrangement (20) comprising an activation needle (21 ) which can be moved by the change in pressure against the propellant cartridge (18) so that it releases the propellant (17).

Description

DESCRIPTION

Extinguishing system with simplified structure

The present invention relates to an extinguishing system having at least one extinguishing agent container, to which at least one extinguishing agent conduit is connected, and in which at least one extinguishing agent nozzle has been provided, which is connected to the extinguishing agent conduit, wherein, when the extinguishing agent container is activated, the extinguishing agent can be released from the extinguishing agent container to the extinguishing agent conduit and can be supplied through the extinguishing agent conduit to the nozzle. fire extinguishing agent.

State of the art

Extinguishing systems are intended to protect people and property in the event of fire. The objects to be protected can be, for example, road or rail passenger transport vehicles, construction vehicles, work machines, machine tools, underground mining, household electrical appliances and the like. An extinguishing system generally comprises one or more extinguishing agent containers permanently installed to contain an extinguishing agent, whereby the extinguishing agent containers in principle may not be arranged at the place where the extinguishing agent is released in a possible source of fire by means of extinguishing agent nozzles. Therefore, extinguishing agent lines are required connecting the extinguishing agent containers to the extinguishing agent nozzles. In this regard, an extinguishing agent conduit having a certain length can extend over a distance, and one or more extinguishing agent nozzles are arranged in the extinguishing agent conduit through which the extinguishing agent can exit.

To activate the extinguishing agent container so that the extinguishing agent is pressed out of it into the extinguishing agent conduit, manual or automatic controls can be used to activate the extinguishing system in the event of a fire. Control of an extinguishing system is usually electrical, hydraulic, pneumatic, or a combination of these. For this, a control conduit or a separate control cable is laid if the extinguishing system is to be electrically activated. If the extinguishing system must be electrically activated, sensors are arranged in the area of possible sources of fire, most of which react to heat or smoke and are activated, for example, at a predefined temperature. A corresponding actuator can be arranged in the extinguishing agent container, which generally causes the extinguishing agent container to be electromechanically activated.

If the activation of the extinguishing agent container is carried out pneumatically or hydraulically, this activation can be carried out by means of an increase in pressure or a pressure drop in the control line to cause an emptying of the extinguishing agent container through the extinguishing agent duct. Consequently, extinguishing systems comprising both a control conduit and an extinguishing agent conduit are known.

The simultaneous need for a control conduit and an extinguishing agent conduit is disadvantageous in that a pressure change in the control line is first required to activate the extinguishing agent container, so that the extinguishing agent in the extinguishing agent container can reach the extinguishing agent line and consequently the extinguishing agent nozzles. Although extinguishing systems are known that have pressurized extinguishing agent lines, emptying is only performed by opening the extinguishing agent nozzles, so it is not necessary to activate the extinguishing agent container itself. These systems have the disadvantage that the extinguishing agent conduit must be permanently under a high system pressure to release the extinguishing agent in case of activation simply by opening the extinguishing agent nozzles. This places great demands on the permanent tightness of the extinguishing agent lines.

From DE 19949277 A1, an extinguishing system is known having at least one extinguishing agent container to which at least one extinguishing agent conduit is connected, and in which at least one extinguishing agent nozzle has been arranged. is connected to the extinguishing agent conduit, wherein, when the extinguishing agent container is activated, the extinguishing agent can be released from the extinguishing agent container to the extinguishing agent conduit and can be supplied through the extinguishing agent conduit to the extinguishing agent nozzle.

Document WO 2009/153532 shows and describes an extinguishing system in which the activation of the extinguishing agent container can be carried out by means of a pressure increase in the extinguishing agent conduit, the extinguishing agent conduit being kept under vacuum in the not activated state.

DE 20 2011 050 100 U1 discloses an extinguishing agent container which has an elastic expansion body (16) which is expandable with a propellant, so that the extinguishing agent can be released into the extinguishing agent line by means of of a change in the shape of the expansion body.

Presentation of the invention: task, solution, advantages

Therefore, the object of the present invention is to provide an extinguishing system having a simple structure and allowing the activation of the extinguishing agent container by simple means.

This task is solved on the basis of an extinction system according to the generic term of claim 1 in conjunction with the characterizing features. Further advantageous developments of the invention are indicated in the dependent claims.

The invention includes the technical teaching that activation of the extinguishing agent container can be implemented by a pressure change in the extinguishing agent conduit.

The invention is based on the idea of implementing an extinguishing system without a control line, since the pneumatic or hydraulic signal to activate the extinguishing agent container is provided through the extinguishing agent line itself. Consequently, separate extinguishing agent lines and control lines are no longer required, and the extinguishing agent container can be arranged away from the possible source of fire, and only one extinguishing agent conduit is required, which is used both for controlling and activating the extinguishing agent container, such as to guide the extinguishing agent from the extinguishing agent container to the extinguishing agent nozzles. The extinguishing system can be designed as an open spray flooding system, and can find application in object protection systems, such as vehicles, kitchen protection, machine protection, turbine protection and rail vehicle protection, where required a permanently installed compact extinguishing system. These protection objects generally have limited space requirements for pipe installation. By combining the extinguishing agent line and control line, the required pipes can be installed much more easily and are less expensive to maintain.

Activation of the extinguishing agent container can be triggered by an increase in pressure in the extinguishing agent conduit, where the extinguishing agent conduit is preferably depressurized and / or emptied in the non-activated state. At least one preferably pneumatic action fire detector is arranged in the extinguishing agent conduit, by means of which the pressure increase in the extinguishing agent conduit can be generated. For example, the fire detector can be of the SPY 20 type and can be actuated pneumatically in a known way. Activation of the fire detector causes an increase in pressure in the extinguishing agent line, which thus serves as a control line. The pressure increase in the extinguishing agent conduit can activate the activating device provided in the connection head of the extinguishing agent container, and the extinguishing agent captured under pressure in the extinguishing agent container enters the extinguishing agent conduit. Thus, the extinguishing agent reaches the extinguishing agent nozzles, and the extinguishing agent preferably arrives from each extinguishing agent nozzle. Preferably, a plurality of fire detectors may be arranged in the extinguishing agent conduit, and the fire detectors and extinguishing agent nozzles may also be integrally formed and arranged in the extinguishing agent conduit.

Only when the pressure in the extinguishing agent conduit has risen to an activation pressure to activate the extinguishing agent container, does the extinguishing agent nozzle reach an opening pressure to open the same, and the opening pressure is higher than the pressure so that the extinguishing agent nozzles still do not open when a pneumatically actuated fire detector is activated. Only when the extinguishing agent from the extinguishing agent container reaches the extinguishing agent conduit, an opening pressure of the extinguishing agent nozzles is reached, which leads to the opening of the extinguishing agent nozzles. The activation pressure for the activation of the extinguishing agent container, in particular for the activation of the activation device in the connection head of the extinguishing agent container, can have a pressure of 0.2 MPa to 0.4 MPa and preferably , a pressure of 0.3 MPa, which is not exceeded. If the extinguishing agent from the extinguishing agent container enters the extinguishing agent conduit, the pressure in the extinguishing agent conduit increases sharply above 0.3 MPa and an opening pressure is reached in the extinguishing agent conduit carrying at the opening of the extinguishing agent nozzles.

This creates a two pressure system, and a first low pressure is used to activate the extinguishing agent container so that the extinguishing agent enters the extinguishing agent conduit with a second substantially higher pressure. Only the second, substantially higher pressure in the extinguishing agent conduit opens the extinguishing agent nozzles, so that the two-pressure system assigns a first function to the extinguishing agent conduit with a first pressure and a second function with a second Pressure.

According to the invention, activation of the extinguishing agent container can also be implemented by means of a pressure drop in the extinguishing agent conduit. In this case, the extinguishing agent conduit can preferably be adjusted under a rest pressure in the non-activated state, while the extinguishing agent conduit can be adjusted in particular under a rest pressure with extinguishing agent. If the pressure in the extinguishing agent line drops below the resting pressure, the actuating device on the connection head of the extinguishing agent container can be activated, and the extinguishing agent passes from the extinguishing agent container to the extinguishing agent passage. . In this case, the rest pressure is selected to be lower than the opening pressure of the extinguishing agent nozzles, and only when the extinguishing agent reaches the extinguishing agent conduit is the opening pressure reached and the extinguishing nozzles open. fire extinguishing agent.

In order to trigger a pressure drop in the extinguishing agent conduit in the event of a fire, at least one temperature-sensitive opening element can be arranged therein, by means of which the extinguishing agent conduit can be vented, the opening element being preferably designed as a fusible link and / or as a sprinkler head. If the temperature of the fusible link and / or the sprinkler head rises due to a fire, in particular to an activation temperature, the opening element opens and the pressure in the Extinguishing agent correspondingly falls below the resting pressure as a result of the ventilation that occurs, which leads to activation of the extinguishing agent container. The extinguishing agent nozzle may have a spring-actuated shutter and / or rupture disc, which opens the extinguishing agent nozzle when the opening pressure is reached in the extinguishing agent line.

If the extinguishing agent nozzle is made in the manner of a spray head, there may be a container filled with fluid that breaks when a certain temperature is reached. Thus, the extinguishing agent nozzle may be integrally formed with the opening member and arranged in the extinguishing agent conduit. The extinguishing agent conduit may be configured as a continuous conduit having the extinguishing agent container at one end thereof. In particular, the extinguishing agent conduit can have branches leading to the respective extinguishing agent nozzles, but also to the opening elements and / or the fire detectors.

According to a further advantageous development of the extinguishing system according to the invention, an electrical detection means can be arranged in the extinguishing agent conduit, by means of which a pressure change triggered in the extinguishing agent conduit, in particular an increase, can be detected. or a pressure drop. When the extinguishing system is activated, an electrical signal can be generated through the electrical sensing means, for example implemented as a pressure switch, the signal of which can be further processed. For example, the electrical signal can be used to activate the shutdown of a system or even the extinguishing system, an alarm, an acoustic and / or visual alarm, or the like.

According to the invention, the extinguishing agent container has an elastic expansion body that can be expanded with a propellant, so that the extinguishing agent is pressed out of the extinguishing agent container through a change in the shape of the extinguishing agent body. expansion and can be released into the extinguishing agent conduit, in which a propellant cartridge for releasing the propellant is preferably housed in the extinguishing agent container, which is surrounded by the expanding body and in which the extinguishing agent it is housed in the space between the expansion body and the extinguishing agent container. In this way, it is achieved that both the pressure generating means and the propellant and the extinguishing agent are compactly housed in a container of extinguishing agent. By arranging a propellant cartridge in the container, the propellant in the container can be pressurized without already keeping the extinguishing agent permanently pressurized. Only when the propellant cartridge is activated can the propellant exit the propellant cartridge and complete the elastic expansion body from the inside. When the propellant enters the elastic expansion body, it expands and can expel the extinguishing agent from the container due to its resulting change in shape. This arrangement of the propellant cartridge in the expansion body allows the expansion body to envelop the propellant cartridge, and when the propellant cartridge is activated, an increase in volume of the expansion body occurs, which reduces the volume between the expansion body and the container, so that the extinguishing agent is expelled from the container.

The extinguishing agent container has a connection head to which the extinguishing agent conduit can be connected and which is arranged to close the extinguishing agent container, while the connection head has an activation arrangement that activates the propellant cartridge when it changes. the pressure in the extinguishing agent line. The activation arrangement comprises an activation needle which can be moved against the propellant cartridge by the change in pressure, that the propellant cartridge releases the propellant. The activation needle, for example, may be disposed on a piston and a surface of the piston can be actuated by the activation pressure to activate the extinguishing agent container. When the piston is actuated, the trigger needle enters an opening region of the propellant cartridge and opens the propellant cartridge. If the propellant subsequently exits the high pressure propellant cartridge, the extinguishing agent is forced into the extinguishing agent conduit at a pressure higher than the activation pressure. Consequently, the extinguishing agent cartridge remains open and the extinguishing agent container can be completely emptied through the extinguishing agent conduit.

Brief description of the drawings

Other measures that improve the invention are shown in more detail below, together with a description of the preferred embodiments of the invention with reference to the figures. It shows:

Fig. 1 an example and embodiment of an extinguishing system that can be activated by a pressure change in the extinguishing agent conduit, the pressure change being produced by an increase in pressure.

Preferred embodiment of the invention

Fig. 1 shows a first embodiment of an extinguishing system 100 comprising an extinguishing agent container 10 to which is connected an extinguishing agent conduit 11. By way of example, only one extinguishing agent container 10 with a conduit is shown. extinguishing agent 11, and the extinguishing system 100 may comprise a plurality of extinguishing agent containers 10 with, for example, also a plurality of extinguishing agent lines 11. By way of example, four extinguishing agent nozzles 12 connected are shown to the extinguishing agent conduit 11. In addition, pneumatic action fire detectors 14 are connected to the extinguishing agent conduit 11, which cause an increase in pressure in the extinguishing agent conduit 11 when there is an increase in temperature and / or when an increase in temperature is detected in the critical fire room.

The extinguishing agent container 10 includes an extinguishing agent 13 that can enter the extinguishing agent conduit 11 when the extinguishing agent container 10 is activated. The extinguishing agent 13 is not pressurized, and the extinguishing agent container 10 further includes a cartridge. of the propellant 18 which is coupled by means of a connection head 19 and extends into the extinguishing agent container 10. The propellant cartridge 18 is surrounded by an expansion body 16, and the extinguishing agent 13 is located in the space between the expansion body 16 and the extinguishing agent container 10.

In the quiescent state of the extinguishing system 100, the extinguishing agent conduit 11 is empty or depressurized. If one of the fire detectors 14 shown by way of example in triplicate detects a fire, the fire detector 14 generates a pressure increase in the extinguishing agent conduit 11 which acts on the connection head 19 of the extinguishing agent container 10 In the connection head 19 an activation device 20 is incorporated, which is activated when the pressure in the extinguishing agent conduit 11 increases, so that the propellant 17, which is housed in the propellant cartridge 18 under pressure , it can enter the space between the propellant cartridge 18 and the expansion body 16.

The activation arrangement 20 includes an activation needle 21 which causes a piercing of a closing area of the propellant cartridge 18 due to an increase in pressure in the extinguishing agent conduit 11, allowing the propellant 17 to escape. As a result of the expansion of the expansion body 16 caused by the penetration of the propellant 17 into the space between the propellant cartridge 18 and the expansion body 16, the extinguishing agent 13 is forced out of the extinguishing agent container 10 towards the extinguishing agent line 11.

The pressure increase in the extinguishing agent conduit 11 due to the entry of the extinguishing agent 13 causes the opening of the extinguishing agent nozzles 12, which are designed in such a way that the extinguishing agent nozzles 12 do not yet open due to a pressure increase of the fire detectors 14, but they open due to a stronger pressure increase caused by the entry of the extinguishing agent 13 into the extinguishing agent conduit 11, since a corresponding activation pressure of the nozzles is reached of extinguishing agent 12. As a result, the extinguishing agent 13, for example, a liquid, reaches the source of the fire through the nozzles of the extinguishing agent 12 and can extinguish it.

The propellant cartridge 18 in operative connection with the expansion body 16 forces the extinguishing agent 13 from the extinguishing agent container 10 into the extinguishing agent conduit 11. As a result, the pressure in the extinguishing agent conduit 11 increases above pressure, and the extinguishing agent nozzles 12 open. For example, the extinguishing agent nozzles 12 may comprise a spring loaded plug and / or a rupture disc that ruptures due to a corresponding increase in pressure, and the extinguishing agent 13 may pass from the extinguishing agent nozzles 12 to the focus of the fire. Thus, an exemplary embodiment is shown which can activate the extinguishing agent container 10 by means of a pressure drop in the extinguishing agent conduit 11 from a rest pressure to a correspondingly lower pressure, and the extinguishing agent 13 can be supplied to the focus. through the extinguishing agent conduit 11 and extinguishing agent nozzles 12.

The invention is not limited in its implementation to the preferred embodiments indicated above. Rather, various variants are conceivable which make use of the presented solution even in fundamentally different embodiments. All characteristics and / or advantages, including construction details or spatial arrangements, which emerge from the claims, the description or the drawings may be essential to the invention, both individually and in a wide variety of combinations. This applies only to combinations that fall within the scope of the invention as defined in the appended claims.

List of references

100 extinguishing system

10 extinguishing agent container

11 extinguishing agent line

12 extinguishing agent nozzle

13 extinguishing agent

14 fire alarm

fifteen -

16 expansion body

17 propellant

propellant cartridge connecting head trigger arrangement trigger needle

Claims (5)

i. Extinguishing system (100) with at least one extinguishing agent container (10), to which at least one extinguishing agent conduit (11) is connected, and in which at least one extinguishing agent nozzle (12) is provided, which is connected to the extinguishing agent conduit (11), wherein, when the extinguishing agent container (10) is activated, the extinguishing agent (13) can be released from the extinguishing agent container (10) into the agent conduit extinguisher (11) and can be fed through the extinguishing agent conduit (11) to the extinguishing agent nozzle (12), and wherein the activation of the extinguishing agent container (10) can be activated by a pressure change in the extinguishing agent conduit (11), characterized in that the activation of the extinguishing agent container (10) can be caused by an increase in pressure in the extinguishing agent conduit (11), the extinguishing agent conduit (11) preferably being depressurized and / or emptied in the non-activated state, and n which at least one fire detector (14), preferably pneumatic action, is arranged in the extinguishing agent conduit (11), by means of which the pressure increase in the extinguishing agent conduit (11) can be generated, or wherein the activation of the extinguishing agent container (10) can be caused by a pressure drop in the extinguishing agent conduit (11), the extinguishing agent conduit (11) is placed under resting pressure in the non-activated state and It is placed under resting pressure with the extinguishing agent (13), and in that the extinguishing agent container (10) has an elastic expansion body (16) that can be expanded with a propellant (17) so that the extinguishing agent (13) can be released into the extinguishing agent conduit (11) through a change in shape of the expansion body (16), in which the extinguishing agent container (10) preferably houses a propellant cartridge (18 ) to release the propellant (17), the propellant cartridge (18) surrounded by the expansion body (16), and the extinguishing agent (13) being housed in the space between the expansion body (16) and the extinguishing agent container (10), in which The extinguishing agent container (10) has a connection head (19) to which the extinguishing agent conduit (11) can be connected and which is arranged to close the extinguishing agent container (10), the connection head (19 ) has an activation arrangement (20) which activates the propellant cartridge (18) in the event of a pressure change in the extinguishing agent conduit (11), the activation arrangement (20) comprising an activation needle (21 ) which can be moved by the change in pressure against the propellant cartridge (18) so that it releases the propellant (17). Extinguishing system according to claim 1, characterized in that the pressure is raised to an activation pressure to activate the extinguishing agent container (10), while the extinguishing agent nozzle (12) requires an opening pressure for its opening which is higher than the activation pressure, in particular, because the activation pressure has a value of 0.2 MPa to 0.4 MPa and preferably 0.3 MPa. Extinguishing system according to claim 1, characterized in that the activation of the extinguishing agent container (10) can be triggered by a pressure drop in the extinguishing agent conduit (11), the rest pressure being lower than the opening pressure of the extinguishing agent nozzle (12), and because at least one temperature-sensitive opening element (15) is arranged in the extinguishing agent conduit (11), by means of which the agent conduit can be vented extinguisher (11), the opening element (15) being preferably designed as a fusible link and / or as a sprinkler head. Extinguishing system according to one of the preceding claims, characterized in that the extinguishing agent nozzle (12) has a spring-loaded shutter and / or a rupture disc which opens the extinguishing agent nozzle (12) when the opening pressure in the extinguishing agent conduit (11). Extinguishing system according to one of the preceding claims, characterized in that an electrical detection means is arranged in the extinguishing agent conduit (11), by means of which a pressure change caused in the extinguishing agent conduit can be detected (eleven).