DE102018132613A1 - Connection part of a direct connection station - Google Patents

Abstract

Connection part of a direct connection station of a fire-fighting system comprising a supply connection, for connection to a pipeline of a water supply, a discharge connection, for connection to a pipeline of the fire-fighting system, a drainage connection, whereby the supply connection, discharge connection and drainage connection are in fluid communication with one another, characterized in that, when installed, both The supply connection and the discharge connection lie above the drainage connection and at least one intermediate wall running in the direction of the drainage connection is arranged between the supply connection and the discharge connection.

Description

The subject relates to a connection part of a direct connection station of a fire-fighting system.

Direct connection stations are subject to special requirements regarding the prevention of microbiological contamination of the connected drinking water supply. According to DIN 14464, a drying section must be provided between a supply connection that is connected to a water supply and a discharge connection that is connected to a pipe of the fire-fighting system.

Direct connection stations are, for example, from the DE 10 2014 226 619 A1 known. These direct connection stations serve to supply the extinguishing fluid line of fire fighting systems. Extinguishing fluid is usually water and is taken directly from the drinking water supply at direct connection stations.

The pipeline of the fire fighting system is connected to extinguishing fluid extraction points or extinguishing nozzles, so that in the event of a fire, the extinguishing fluid is transported to the extinguishing nozzles or the extinguishing water extraction points via the pipeline of the fire extinguishing system. Since the direct connection station is directly connected to the drinking water supply line, microbiological contamination must be prevented. Especially in wet systems where even in the idle state, i.e. If the fire fighting system is not activated and there is no fire, is filled with extinguishing fluid, a high number of microorganisms can easily form in the pipes. These must not reach the drinking water pipe to protect the drinking water from contamination.

The previous effort to protect the drinking water supply from contamination by microorganisms is considerable, which makes direct connection stations structurally complex and thus also expensive.

The object was therefore based on the task of providing a direct connection station with a simple structure and high interference immunity with simple maintenance. An additional disinfection measure should also be unnecessary.

This object is achieved by a connecting part according to claim 1.

The connector in question provides a safe separation between the water supply, in particular the drinking water pipe and the extinguishing fluid supply in the pipe of the fire-fighting system. With the aid of the connecting part in question, a direct connection station can be implemented in a particularly simple, low-maintenance and very safe manner. The supply connection, which is connected to a pipeline of a water supply, is in fluid communication with a discharge connection, which is provided for connection to a pipeline of the fire-fighting system.

A drainage connection is provided between the supply connection and the discharge connection, and can drain a pipe section that is present between the supply connection and the discharge connection. For this purpose, the drainage connection can be opened and the pipe section between the supply connection and the discharge connection can be drained.

The particularly safe separation between the water supply and the fire fighting system to prevent the migration of microorganisms, even in the event of a fault, is ensured by the fact that both the supply connection and the discharge connection are above the drainage connection in the installed state and that at least one in the direction of the drainage connection runs between the supply connection and the discharge connection Partition is arranged. This ensures, even in the event of a leak, that extinguishing fluid leaking from the discharge connection does not reach the supply connection, but is inevitably fed to the drainage connection by gravity. From there it is possible to drain the pipeline section between the supply connection and the discharge connection.

A suitable connection of the valves to the supply connection, discharge connection and drainage connection can ensure that the pipeline section between these connections is always dry when at rest.

The idle case is the operating case in which the fire fighting system is not activated, i.e. no extinguishing fluid should flow from the supply connection to the discharge connection. In the event of a fire, extinguishing fluid is applied in the pipeline of the fire fighting system via the tapping points or the extinguishing nozzles. The supply connection is connected to the discharge connection to make up the extinguishing fluid.

The connecting part is preferably formed by a common pipe section. The supply connection, discharge connection and drainage connection can be arranged together in a single assembly. A such a connector can be integrated into the direct connector station. The installation effort is extremely low, since a single component with its connecting flanges has to be connected to the supply connection and discharge connection to the respective pipelines. The pipeline section between the connections can be drained particularly easily via the drainage connection. In the event of a leak, the drainage connection also prevents this pipeline section from running full, so that an increase in the fluid level in the pipeline section is avoided. This reliably prevents extinguishing fluid from being present at the same time in the interior of the connection part on the supply connection and the discharge connection. This reliably prevents microorganisms from migrating from the pipeline of the fire-fighting system via the discharge connection to the supply connection. Contamination of the drinking water supply is thus safely avoided.

According to one exemplary embodiment, it is proposed that a valve, in particular a spring return valve, be arranged on the supply connection and / or on the discharge connection and / or on the drainage connection. The supply connection or the discharge connection can be opened or closed via the respective valve in order to establish a connection between the interior of the connecting part and a pipeline connected to the respective connections. The valve on the drainage connection makes it possible to open the drainage connection in the idle state, so as to drain the connection part. The valve is in particular a spring return valve to ensure that the valve closes in the event of an electrical fault.

Additional security against contamination of the drinking water supply is achieved in that a backflow preventer is arranged on the supply connection and / or on the discharge connection. This backflow preventer additionally prevents backflow of extinguishing fluid from the interior of the connection part into the pipelines arranged at the connections. However, the backflow preventer can also be defective and, for example, have a leak, in which case the connection part in question then still ensures a safe separation between the water supply and the pipeline of the fire-fighting system.

According to one exemplary embodiment, it is proposed that a pressure sensor be arranged on the supply connection and / or on the discharge connection. With this pressure sensor it is possible to measure the applied fluid pressure. In the event of a fire, extinguishing fluid is taken from the pipeline of the fire fighting system. The removal of the extinguishing fluid leads to a drop in the pressure in the pipeline at the discharge connection. This pressure drop can be sensed by the pressure sensor. Since there is always an essentially constant pressure at the water supply, it can be determined that the pressure in the pipeline at the discharge connection is lower than the pressure in the pipeline at the supply connection and there is therefore a fire. In this case, the valves on the supply connection and discharge connection can be opened and the valve on the drainage connection can be closed, so that extinguishing fluid can be driven from the water supply into the pipeline of the fire fighting system.

If the extinguishing nozzles are closed or if no further water is drawn off or a valve in the pipe of the fire-fighting system is closed manually, the pressure in the pipe at the discharge connection rises again and adjusts itself to the pressure in the pipe at the supply connection. If the measured pressures are the same, this can mean that the fire fighting system is no longer activated and the valves on the supply connection and discharge connection can be closed. The valve on the drainage connection can therefore be opened in order to drain the connection part and thus ensure a dry pipeline section between the supply connection and the discharge connection.

Even in the event of a pressure drop in the pipeline of the supply connection, for example if there is a pressure drop in the area of the water supply, the pressure sensors can be used to determine. This can also be regarded as a case of rest and the valves on the supply connection and discharge connection remain closed, whereas the valve on the drainage connection is open.

The opening of the valve at the drainage connection ensures that, in the event of rest, the pipeline section between the supply connection and the discharge connection of the connection part always remains dry and a backflow of microorganisms is prevented.

To ensure that there is an intermediate wall between the supply connection and the discharge connection, it is proposed that the supply connection with the discharge connection be inclined to one another such that an angle enclosed between the supply connection and the discharge connection, which points away from the ventilation connection, is less than 180 °. This ensures that gravity-driven leakage water that flows from the Leakage connection emerges to which the ventilation connection is led without being led past the supply connection. The described configuration of the included angle leads to the supply connection and discharge connection and possibly the ventilation connection being arranged in a Y-shape with respect to one another. A V-shaped arrangement or a U-shaped arrangement or another arrangement which enables the described angular inclusion is also conceivable.

According to one embodiment, it is proposed that the supply connection and the discharge connection are each connected to a wet pipeline during operation. The pipes of the fire-fighting system as well as the water supply are filled with extinguishing fluid or water when the connecting part is in operation, which can be idle and fire. In these wet systems in particular, the backflow must be prevented, in particular in the idle state, in order to avoid an exchange of microorganisms from the pipe system of the fire-fighting system into the pipe system of the water supply.

The supply connection and / or the discharge connection are at least partially formed from a straight or curved pipe section. The pipe sections together form the pipe section forming the connecting part.

Between the supply connection and the discharge connection as well as the drainage connection, the connection part can be formed as a pipe section and an alarm pressure sensor can be arranged in this pipe section. In the event of a fire, as described, in particular by means of an electrical control, the valves on the supply connection and discharge connection are opened and the valve on the drainage connection is closed. In this case the connector is flooded. The alarm pressure sensor senses such flooding and can trigger an alarm signal. This makes it possible to monitor the function of the connecting part.

A further safeguard against bacterial contamination can be achieved in that the pipeline section between the supply connection and the discharge connection of the connection part is flooded with an inert gas in the event of rest. An inert gas can more easily have a lower density than the air density at 20 ° C. The inert gas can be an inert gas or nitrogen. The inert gas can e.g. be introduced via the drainage connection or a connection in the area of the alarm pressure sensor.

A further safeguard against bacterial contamination can be achieved by heating the pipeline section between the supply connection and the discharge connection of the connection part in the event of rest or in sections, in particular above a temperature of 50 ° C, preferably above 61.5 ° C, for at least 30 minutes . The following minimum temperatures are preferred with said minimum time: 61.5 ° C. at 30 minutes; 80 ° C at 30 min, 100 ° C at 5-30 min; 105 ° C at 5 min; 121 ° C at 15 min; 132 ° C at 60 min. This heating can kill any bacteria and / or viruses that may be present.

Another aspect is a method according to claim 10.

In the connection part, the separation between the supply connection and the discharge connection is gravity-driven. In the idle state, the drainage connection is always below the supply connection and the discharge connection. Furthermore, the supply connection and discharge connection are always located above an intermediate wall separating these two connections, so that extinguishing fluid is always fed to the drainage connection by gravity. An extinguishing fluid escaping due to leaks at the discharge connection thus always reaches the drainage connection and not the supply connection due to the force of gravity.

As already described, there is a pressure comparison between the fluid pressures at the supply connection and the discharge connection. With this pressure comparison, an automatic control of the valves at the respective connections can take place, in particular by means of an electrical control, so that, as already described above, a valve position can take place depending on the pressures and thus the respective valves in the event of fire or in the idle state are correctly opened or closed.

As also mentioned above, the connection part is dry in the idle state. This is made possible by drainage at the drainage connection.

• 1a-c ein Anschlussteil in verschiedenen Schaltstellungen;
• 2a-i verschiedene Konfigurationen von Anschlussteilen.

The subject is explained in more detail below with reference to a drawing showing exemplary embodiments. The drawing shows:

• 1a-c a connector in different switching positions;
• 2a-i different configurations of connecting parts.

1a shows a connector 2nd with a supply connection 4th and a drain connection 6 as well as a vent connection 8th . The connection part is formed in the form of a pipe and a supply connection 4th , Discharge connection 6 and vent connection 8th are in fluid communication with each other via a common pipe.

At the supply connection 4th is about a valve 10th and a backflow preventer 12 , a pipeline 14 connected to a drinking water supply. In the area of the valve 10th and / or the backflow preventer 12 is a pressure sensor 16 intended.

The drain connection 6 is about a valve 18th and a backflow preventer 20th to a pipeline 22 connected to a fire fighting system. In the area of the valve 18th and / or the backflow preventer 20th is a pressure sensor 24th intended.

The valves 10th , 18th can be formed as spring return valves. The valves 10th , 18th can be controlled electrically.

At the vent connection 8th is another valve 26 provided, which can also be controlled electrically.

The pressure sensors 16 , 24th are in fluid communication with the fluid in the pipeline 22 or the pipeline 14 and measure the fluid pressure there.

The extinguishing fluid is preferably water.

Again 1 two pipeline walls can be seen 28a , b between the supply connection 4th and the drain connection 6 arranged. Supply connection 4th and drain connection 6 or their pipe sections are in the direction of the vent connection 8th inclined. An angle α between the walls 28a , b which the vent connection 8th is at least less than 180 °.

Inside the connector 2nd is an alarm pressure switch 30th intended. This alarm pressure switch 30th measures the pressure within the pipe section of the connector 2nd .

1a shows the connector 2nd in an idle state. The valves 10th , 18th are closed and the valve 26 is opened. The valve position can depend on the pressure sensors 16 , 24th measured pressures.

Normally there is an essentially constant pressure in the pipe 14 the water supply at the pressure sensor 16 on. Extinguishing nozzles or tapping points in the area of the pipeline 22 are closed so the prints by the pressure sensors 16 , 24th are measured, are approximately the same. In this case, the valves 10th , 18th closed.

Even if there is a pressure drop in the water supply, the valves should 10th , 18th remain closed as long as there is no fire. Ie that with one from the pressure sensor 16 measured pressure, which is less than the pressure by the pressure sensor 24th who have favourited Valves 10th , 18th also remain closed.

The valve 26 opens in both conditions. This is the idle state and the connector 2nd is dry.

In the event of fire, the pipeline 22 Extinguishing fluid is discharged from an extinguishing nozzle or removed at an extraction point. This leads to a drop in pressure in the pipeline 22 . This pressure drop is caused by the pressure sensor 24th detected. The one on the pressure sensor 24th detected pressure is lower than that at the pressure sensor 16 detected pressure. In the case of this condition, the valves 10th , 18th preferably electrically opened and the valve 26 closed. Extinguishing fluid passes through the supply connection 4th into the connector 2nd flows in along the vent connection 8th to the drain connection 6 into the pipeline 22 . Because the valve 26 is closed, the fire-fighting system is supplied with extinguishing fluid.

The alarm pressure switch 30th is activated in this case because it detects an increase in pressure within the connector. An alarm signal output can be evaluated in such a way that it can be determined that the connecting part 2nd is functional.

1c shows an idle state according to the 1a , but in which the valve 18th and the backflow preventer 24th are not completely closed and leakage occurs.

Due to the position of the supply connection 4 to the discharge connection achieved in the installed state 6 , such that always one of the wall 28a , b between these connections 4th , 6 lies and the wall in the direction of the vent connection 8th is directed so that lead connection 4th and drain connection 6 always in the direction of the vent connection 8th are inclined by a leak in the connector 2nd entering extinguishing fluid, as in the 1c shown, directly gravity driven to the vent port 8th guided. Since the valve is at rest 26 is open, the connecting part 2nd at the drainage connection 8th drained.

As can be seen, extinguishing fluid flows directly to the drainage connection 8th without on the supply connection 4th to get. This reliably prevents microorganisms from being removed from the discharge connection by the extinguishing fluid 6 to the supply connection 4th can reach.

The configuration of the connector 2nd can be varied as long as it is ensured that the supply connection 4th and drain connection 6 in their installation position in the direction of the drainage connection 8th are inclined and between the supply connection 4th and drain connection 6 at least one partition is formed. The intermediate wall can also be through pipe walls of pipe sections of the respective connections 4th , 6 be educated.

2a shows a U-shaped configuration with a small radius, the pipe sections of the supply connection 4th and drain connection 6 are at least partially curved and in the direction of the vent connection 8th run towards each other.

2 B shows a first Y-configuration, in which the length of the pipe sections of the supply connection 4th and the discharge connection 6 are different from each other.

2c shows a second Y configuration, in which the drainage connection 8th is not inclined vertically downwards, but runs obliquely downwards. However, it remains that supply connection 4th and drain connection 6 towards the drainage connection 8th are inclined and a wall between these two connections 4th and 6 remains.

2d shows another Y configuration, in which the opening angle α between supply connection 4th and drain connection 6 is particularly large, but remains below 180 °.

In contrast, it shows 2e a configuration where the supply line connection 4th and drain connection 6 run essentially parallel to each other and only a small distance between these terminations 4th and 6 remains.

2f shows an embodiment in which the lead connection 4th and drain connection 6 have different pipe diameters.

2g shows a configuration at the supply line connection 4th and drain connection 6 as well as drainage connection 8th are inclined to each other in a y-shape.

2h shows a configuration according to 2a , at which the radius of the bent connections 4th , 6 is bigger.

2i shows a variation of the configuration according to 2g , where the pipe sections of the supply connection 4th and drain connection 8th are inclined differently and from a vertical area to a sloping area in addition to the drainage connection 8th are inclined.

Reference symbol list

2nd

Connector

4th

Supply connection

6

Drain connection

8th

Vent connection

10th

Valve

12

Backflow preventer

14

Pipeline

16

Pressure sensor

18th

Valve

20th

Backflow preventer

22

Pipeline

24th

Pressure sensor

26

Valve

28a, b

wall

30th

Alarm pressure switch

α

angle

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102014226619 A1 [0003]

Claims (15)

Connection part of a direct connection station of a fire-fighting system comprising: - a supply connection, for connection to a pipeline of a water supply, - a drain connection, for connection to a pipeline of the fire-fighting system, - a drainage connection, whereby - the supply connection, discharge connection and drainage connection are in fluid communication with each other, characterized in that - That in the installed state both the supply connection and the discharge connection lie above the drainage connection and that at least one intermediate wall running in the direction of the drainage connection is arranged between the supply connection and the discharge connection. Connector after Claim 1 , characterized in that - supply connection, discharge connection and drainage connection are arranged together in one assembly. Connection part according to one of the preceding claims, characterized in that a valve, in particular a spring return valve, is arranged on the supply connection and / or on the discharge connection and / or on the drainage connection. Connecting part according to one of the preceding claims, characterized in that - a backflow preventer is arranged on the supply connection and / or on the discharge connection. Connecting part according to one of the preceding claims, characterized in that a pressure sensor is arranged on the supply connection and / or on the discharge connection. Connection part according to one of the preceding claims, characterized in that - the supply connection with the discharge connection are inclined to one another such that an angle enclosed between the supply connection and the discharge connection, which points away from the ventilation connection, is less than 180 °. Connection part according to one of the preceding claims, characterized in that - in operation, the supply connection and the discharge connection are each connected to a wet pipeline, in particular that the pipeline of the water supply and the pipeline of the fire-fighting system are filled with extinguishing fluid, in particular water. Connection part according to one of the preceding claims, characterized in that - the supply connection and / or the discharge connection are at least partially formed from a straight or a curved pipe section. Connection part according to one of the preceding claims, characterized in that - an alarm pressure sensor is arranged in the pipeline section arranged between the supply connection, the discharge connection and the drainage connection. Method for operating a connection part according to one of the preceding claims, in which - the supply connection and the discharge connection are closed in an idle state and the drainage connection is opened, - in the event of a fire, the drainage connection is closed and the supply connection and the discharge connection are opened, characterized , - that in an idle state in the event of a leakage of the discharge connection, the extinguishing fluid is gravity-fed to the drainage connection, so that the extinguishing fluid emerging from the discharge connection does not reach the supply connection. Procedure according to Claim 10 , characterized in that - a pressure comparison between the fluid pressures at the supply connection and the discharge connection is carried out. Procedure according to Claim 10 or 11 , characterized in that - at substantially the same fluid pressures, the supply connection and the discharge connection are closed and the drainage connection is opened. Procedure according to one of the Claims 10 to 12 , characterized in that - with a lower fluid pressure at the supply connection as the discharge connection, the supply connection and the discharge connection are closed and the drainage connection is opened. Procedure according to one of the Claims 10 to 13 , characterized in that - at a greater fluid pressure at the supply connection than at the discharge connection, the supply connection and the discharge connection be opened and the drainage connection is closed. Method according to one of the preceding Claims 10 to 14 , characterized in that - in the idle state, the pipeline section arranged between the supply connection, the discharge connection and the drainage connection is dry.

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