DE202008006811U1 - Automatic release system for smoke extraction systems in fire protection - Google Patents

Abstract

Freiblassystem (1) for automatic cleaning of sensing tubes (3) of smoke aspiration systems (2), characterized in that in a housing a control unit (15), a function light with button (16), at least one suction line valve (s) (18), at least one pressure valve (e) (19), a compressed air clutch (6) and a system heating (14) are provided and a building block form, by means of sleeves (4) between Rauchansaugsystem (2) and the sensing tubes (3) can be installed, each sensing tube (3) to a Fühlrohranschluss (3a) of the release system is connected, on the one hand via a Suction line valve (18) over the suction pipe connection (5a) with the associated suction pipe (5) of the Rauchansaugsystems (2) and on the other hand a pressure valve (19) connected to an internal pressure line (20) is which over the compressed air coupling (6) from an external factory compressor (17) is fed.

Description

The The invention relates to a release system for automatic cleaning of sensing tubes of smoke aspiration systems.

The Field of application of the automatic blower device is the preventive Fire protection, where Rauchansaugsysteme div. Manufacturer indoor air by long Pipes from the protected clear suck it into the smoke aspiration system (fire detector) and if necessary Detecting smoke in the air stream.

The Problem is that in addition to air and dust into the pipe network arrives the suction holes clogged in the pipes. This leads to fault messages, since the air flow, which the smoke aspiration system sucks, becomes too small. In addition, can a fire too late or not detected at all.

at early detection Of fire smoke in the air (fire protection) are often so-called Rauchansaugsysteme used, which by means of a suction fan room air through long Feel pipelines from the monitored clear suck and check for smoke particles. Here are next to the Air also sucked in dust and other contaminants, which the suction holes in the sensor tubes and the sensing tubes even up to the electronics contaminate or even clog. Due to this blockage, the sucked air volume is getting smaller. The result is a fault message through the smoke aspiration system and / or prolonged fire detection time up to the failure of fire detection.

was standing the technology is in case of disturbances and blockages by dust the sensing tubes from the smoke aspiration system by unscrewing, then blow out the sensing tube with compressed air and in the end to build everything together again.

Of the The invention is therefore based on the object, the sensing tubes a smoke aspiration system during normal operation even without service personnel fully automatic means Clean compressed air. This should make it possible, even with strong polluted test air the entire sensor tube network automated functional and low-interference / free to be able to operate.

This Cleaning process should be freely selectable Times are executed fully automatically several times a day. It should also be possible by a signal from the smoke aspiration system (intake air volume is slowly becoming too low) a cleaning process is triggered off-schedule can. As a third option The cleaning process should be triggered by pressing a button on the device.

at an existing fire alarm (smoke particle level too high, but no alarm yet = border area), all possible blow-out procedures must be suppressed, to lose no detection time.

The The air release system must be able to carry out the compressed air required for the cleaning process Activate the on-site compressors / compressed air systems provide. The resulting during the cleaning process disturbance (by necessary sealing of the smoke aspiration system from the sensor tubes) must pass through the exhaust system at the smoke aspiration system or the fire alarm system suppressed / acknowledged become.

The Asked task is by a release system with the characterizing Characteristics of claim 1 solved.

The automatic release system is as claimed in claim 1 as a building block, which contains all components, installed between the smoke aspiration system and the guide tube network. In normal condition flows through the polluted test air the Saugstrangventile, which by their nature according to claim 2 do not disturb the air flow.

Becomes a cleaning cycle by the control unit by means of time control, by an input of the smoke aspiration system or by manual triggering on the button started and not prevented by a suppression command because of a fire pre-alarm, this is how the cleaning program starts.

In A preferred variant is the cleaning cycle for each Suction tube executed alone. The is called, in a system with four suction pipes, the individual cleaning cycles are from suction tube 1-4 in succession delayed. This consumes less compressed air at the same time, which protects the compressed air network and the compressors of the operator. Furthermore, Be careful of the sensitive electronics of the smoke aspiration system taken by breaks for dissolution the Staubverwirbelungen and normalizing the air flow made to minimize error messages in the smoke aspiration system.

in the The invention will be described in more detail below with reference to drawings.

It shows 1 the outside of the free-floating system (housing closed) integrated in the smoke aspiration system, the sensing tubes, etc.

2 shows the interior (housing open) of the free-air system.

In the automatic release system ( 1 ) for smoke aspiration systems ( 2 ) is a system with a metal housing. It is used between smoke aspiration system ( 2 ) and the sensing tubes ( 3 ) installed on the wall. In this case, the release system ( 1 ) so that it fits with the standard pipe (currently 25 mm PVC) of each smoke aspiration system manufacturer by means of the sleeves 4a + b can be installed in the Fühlrohrstrang. Above ( 4a ) the sensing tubes ( 3 ) and below ( 4b ), the suction pipes ( 5 ) connected.

Bottom right is a compressed air coupling ( 6 ), z. B. a quick coupling, through which the external compressed air in the release system ( 1 ) to the internal pressure line ( 20 ) to be led.

At the bottom left of the system are three sealable cable entries for electrical cables ( 7 ). As in 1 watch is here
the 230 Volt mains supply ( 8th )
the compressor switching line / operation monitoring ( 9 )
the interference suppression for the smoke aspiration system ( 10 )
the control cables for unscheduled blasting ( 11 )
the fire suppression control line in case of fire pre-alarm ( 12 )
from the release system ( 1 ) led to the respective connections.

When closed, the user has a control panel with IP65 cover ( 13 ) in the upper right part. Here the temperature of the integrated system heating ( 14 ), which ensures the operating temperature even at low outside temperatures.

Furthermore, here is the control unit (SPS logo) ( 15 ), which regulates the operation by means of a specially developed control program. Finally, on the control panel, a function lamp with button ( 16 ), which signals the operating state and can be used to manually trigger a blow-off cycle.

In the open state 2 you can also see the valve groups in the device. Here are on the one hand the Saugstrangventile ( 18 ) and the pressure valves ( 19 ) for the release of compressed air.

In normal operation, the Saugstrangventile ( 18 ) in the suction line, so that the air flow which the Rauchansaugsystem ( 2 ) through the sensing tube network ( 3 ) from the rooms to be monitored sucks unhindered the valves can pass. Here are the specially selected 1 inch Saugstrangventile ( 18 ) are internally formed so as to produce very low air resistance and low turbulence in order to increase the function and possible tube length of the smoke aspiration system ( 2 ) not to be affected. In addition, the valves close and open without pressure.

Now, by the control program of the control unit ( 15 ) initiated on the schedule, by an unscheduled blasting through an input of Rauchansaugsystems or by a manual triggering a blasting operation, so first the air compressor ( 17 ) activated by a contact. Next, the smoke aspiration system ( 2 ) that cleaning is imminent. This prevents a fault which would trigger the next step. Here is the Saugstrangventil ( 18 ) tightly closed to the smoke aspiration system ( 2 ) to protect against damage. Thereafter, the belonging to the strand pressure valve ( 19 ), whereby the compressed air the sensing tube ( 3 ) flows through and freed the tube and the suction holes of impurities and deposits. After cleaning, the pressure valve ( 19 ) and wait a few seconds until the air flow calms down. Then the Saugstrangventil ( 18 ) and the smoke aspiration system ( 2 ) can again air from the sensing tube ( 3 ). Normal operation is restored.

This Cleaning process depends on the number of sensing tubes (number of sensing tubes 1-4 pieces) to repeated four times in succession. Will during the initiation of the cleaning process a fire alarm or a fire alarm is displayed to the release system, so the blow-out for safety does not take place.

Claims (4)

Clearance system ( 1 ) for automatic cleaning of sensor tubes ( 3 ) of smoke aspiration systems ( 2 ), characterized in that in a housing a control unit ( 15 ), a function lamp with button ( 16 ), at least one suction line valve (e) ( 18 ), at least one pressure valve (e) ( 19 ), a compressed air coupling ( 6 ) and a system heating ( 14 ) are provided and form a block which by means of sleeves ( 4 ) between the smoke aspiration system ( 2 ) and the sensing tubes ( 3 ), whereby each sensing tube ( 3 ) to a sensing tube connection ( 3a ) is connected to the Freiblassystems, on the one hand via a Saugstrangventil ( 18 ) via the suction pipe connection ( 5a ) with the associated intake manifold ( 5 ) of the smoke aspiration system ( 2 ) and on the other hand via a pressure valve ( 19 ) with an internal pressure line ( 20 ), which via the compressed air coupling ( 6 ) from an external factory compressor ( 17 ) is fed. Blanking system according to claim 1, characterized ge indicates that the free cross-section of the Saugstrangventile ( 18 ) substantially the cross section of the suction line ( 5 ) and thus the function of the Rauchansaugsystems ( 2 ), the Saugstrangventile ( 18 ) in the closed state but are tight against the compressed air and so the Rauchansaugsystem ( 2 ) protect against overpressure. Blanking system according to one of claims 1 or 2, characterized in that with the control unit ( 15 ) a control input ( 11 ) to which a command output of the smoke aspiration system ( 2 ) can be connected to start an unscheduled cleaning cycle once the smoke aspiration system ( 2 ) a reduced air flow rate of one of the sensing tubes ( 3 ) signals. Blanking system according to one of claims 1 to 3, characterized in that the button ( 16 ) with the control unit ( 15 ) is connected, so that after its operation, an unscheduled cleaning cycle is started.