DE202007004458U1 - Foam protection unit for objects and people includes pipeline system with ejection device with nozzle having spiral guide face producing fine foam mist to reach extensive areas - Google Patents

Abstract

The foam protection unit comprises a pipeline system (4) fitted with at least one ejection device (5) having at least one nozzle (31) with at least one spiral guide face to produce compressed air foam. The nozzle is mounted at 0.1 m to 5 m away from an extinguishing object or decontamination object and produces an outlet cone with an angle between 30 and 180 degrees. The foam unit can operate with an extinguishing agent and/or decontamination agent.

Description

The The invention relates to a foam system for the protection of persons or objects for discharging a multiphase agent, which comprises at least one Gas phase comprising a conduit system, to which at least a dispensing device is connected.

Around possible fire damage if possible low-fire, buildings, facilities and objects are at risk of fire stationary extinguishing systems fitted. The stationary Extinguishing systems include usually a pipe or pipe system, which means the to the fire or to the endangered Objects are unloaded. For special use and to improve the fire fighting is as a means foam, in particular a mixture of water, a foaming agent and a pressurized gas.

Furthermore, become stationary Foam plants used for decontamination of persons and equipment. Such decontamination foam systems cover a decontamination object with foam to this, for example, bacteria or chemicals, to free or to neutralize them.

A possibility to carry out the foam is to discharge this through hollow jet nozzles. These produce a hollow cone-shaped beam, which one reasonable Distribution of the foam allows when an oscillating movement of the nozzle takes place. Otherwise it will a limited one Area, in particular an annular surface, through covered the foam. additionally A disadvantage, for example, is a resulting Sogeffekt the flames to the hollow jet nozzle. This possibility Therefore, it is mainly used in hand jet pipes.

A Another method to discharge the foam is through hollow jet nozzles, which in addition to hollow conical Beam generate a central ray. Through such nozzles is also a partial surface within the resulting by a pure hollow cone-shaped beam ring surface covered.

Furthermore, It is known to discharge the foam by a rotary application. This is a rotating nozzle needed around the deletion object or cover the decontamination object reasonably evenly.

Of the Invention is therefore the object of a foam system so to design that an improved extinguishing effect or decontamination effect and a low-maintenance use is achieved.

The Invention solves the stated object in that the discharge device at least one Nozzle with at least one spiral baffle includes.

Advantageous is in the process of producing a fine foam mist with a spatial effect can. The spatial Effect is particularly important where not smooth, large areas to be covered, but also nested geometries to protect are. For example, you can thus better machines or engines as well as small load warehouse protected or decontaminated. The fine foam mist can without movably arranged components are produced which the foam to distribute. Furthermore, this can, for example, an increased exit velocity be achieved, so also an improved distribution in wind and a thermal caused by a fire is achievable. Furthermore, it may be advantageous that the improved distribution the agent's output quantity can be reduced and thus a reduction of water damage as well a reduction of the amount to be stocked or to be collected Foaming agent or foam is achieved.

A Further development provides that the line system is a gassing device includes. By the gassing device can be an optimal multi-phase Mixture of the agent are produced, which in combination with the nozzle with at least one spiral baffle an improved spreading and extinguishing effect or decontamination effect can be achieved.

By an education in which the foam system by a CAFS (compressed Air foam system) can be formed, for example, special fire risk Objects, such as engines, are better protected. Furthermore, this can be a effective decontamination system.

A Further training provides that the guide surface to a in discharge direction at least approximately conical contiguous bore adjacent. This ensures that the emerging means optimally and evenly distributed on the spiral guide surface becomes. Thus lets in a row spatially evenly distributed Realize beam.

Embodiments are also advantageous in which the surface normals of the guide surface form an angle with a center axis of the nozzle or the angle between the surface normals of the guide surface and the center axis of the nozzle changes, in particular from almost 0 ° to nearly 90 °. As a result, the funds can be better routed and spatially distributed approximately evenly Beam be transferred.

at a further embodiment, wherein the nozzle pivotally on the line system is arranged, that is an accurate and easy adjustment the effective range of the foam system can be achieved.

Advantageous is also a training in which the nozzle at a distance of 0.1 m to 5 m, in particular approximately above, of a deletion object or a decontamination object is arranged distanced. Thereby the object is in an optimal area of effect of the Spray cone.

By a development in which the nozzle for generating a discharge cone is formed of the means which has an angle between 30 ° and 180 °, It is advantageous that in this area an optimal distribution of the agent is achievable.

According to one Training in which the pipe system is a control device for Has rules of the volume flow and / or the pressure of the agent, It is advantageous to have a more uniform consistency of the multiphase Can be generated by means.

Advantageous is also a development in which the delivery device, especially the nozzle, and / or the conduit system is connected to a grounding line. Thereby can electrical voltages, in particular electrostatic voltages, be degraded, which, for example, by the flow of Can arise by means.

A another possibility provides that the multiphase agent by an extinguishing agent is formed. This can, for example, by the finely distributed Beam, optimal fire fighting be achieved.

Advantageous is also a variant in which the multiphase agent by a decontamination agent is formed. This can, for example an effective decontamination of a biologically or chemically contaminated Object allows become.

The Invention will be described below with reference to the drawings embodiments explained in more detail.

It demonstrate:

1 a schematic representation of a foam system;

2 a schematic representation of a further embodiment of the foam system;

3 a nozzle with spiral vanes.

Introducing noted that the same in the differently described embodiments Parts with the same reference numerals or the same component designations provided throughout the description Revelations mutatis mutandis to the same Transfer parts with the same reference numerals or the same component designations can be. Also, the location information chosen in the description, such as above, bottom, side, etc. on the immediately described and illustrated Figur referenced and are mutatis mutandis to a change in position on the transfer new situation.

In the 1 is a schematic representation of a possible formation of a foam system 1 shown. Preferably, the foam system 1 formed by a CAFS (compressed air foam system) plant. In such a system, an agent is prepared by pressurizing or mixing a water-foaming agent mixture with a pressurized gas, in particular compressed air.

Such foam systems 1 Can be used on the one hand for fire fighting as foam extinguishing systems or as foam decontamination plants. In both cases, an object or possibly also persons are sprayed or coated with foam in order to achieve cooling, extinguishment of flames and / or decontamination of the objects or persons.

Of the Foam is formed by a multi-phase agent, which at least has a gas phase. The agent may also preferably be liquid substances, gel Substances and / or solids. The multiphase agent preferably contains one Foaming agent, in particular at least one surfactant. The foaming agent may further be suitable for decontamination or neutralization substances include, for example, a basic substance or an acidic one Substance, a disinfectant, in particular a formaldehyde or Methanalhaltiges agent, formic acid, and / or others, zur biological and / or chemical decontamination appropriate means.

The foam system 1 is essentially a functional area of a water supply device 2 and a compressed gas supply device 3 formed, which via a pipe system 4 with at least one dispensing device 5 are connected. The pipe system 4 includes a water pressure line 6 , a gas pipe 7 and a gassing device 8th , wherein the water pressure line 6 the water supply Facility 2 with the gassing device 8th connects and the gas line 7 the compressed gas supply device 3 with the gassing device 8th combines.

The water supply device 2 gets through a a water 9 receiving tank 10 , a preferably adjustable water pump 11 and a Zumischeinrichtung 12 , with the addition of a water flow 13 , in particular a foaming agent is added, formed. The admixing device 12 takes the addition 13 from a container 14 and leads this by means of a metering pump 15 , which is preferably controllable, one of the water pump 11 downstream introduction device 16 to. The introduction device 16 is formed for example by a nozzle plate, with a uniform distribution of the additive 13 is achieved in the water stream.

The addition of the additive 13 is both automatically, depending on various parameters such as the water flow rate or the formation of demand-dependent concentrations, but also manually if necessary, regulated.

Subsequently, the water-foaming agent mixture via the water-pressure line 6 the gassing device 8th fed. In this, the introduction of a gas flow under a variable in a predetermined control range overpressure from the compressed gas supply device takes place 3 ,

The compressed gas supply device 3 is essentially made of at least one pressurized gas container 17 , eg a gas bottle 18 , and the one gas stream of the gassing device 8th feeding gas line 7 educated. Preferably, the gassing device 8th in the gas line 7 a pressure control device 19 with a pressure regulator 20 upstream. As the gas, for example, compressed air, carbon dioxide, a noble gas or a mixture of these or similar gases can be used.

The optionally arranged pressure control device 19 is a pressure reducing valve 21 with a differential pressure control device 22 , in the example shown, a manual actuator 23 by means of a differential pressure within a possible differential pressure range for the output pressure of the gaseous medium and pressurization of the water flow in the gassing device 8th is adjustable. The pressure control device 19 is also via a reference pressure line 24 with the water pressure line 6 connected. This will be the differential pressure control device 22 with each, in the water pressure line 6 pending and varied by quantity and release influences varying pressure, which thus forms a control variable for the output pressure level of the gas stream. Thus, the intended pressure difference, ie the overpressure of the gas stream relative to the pressure of the water flow and thus also the properties of the foam, kept approximately constant.

In the gas line 7 are the pressure regulator 20 upstream and downstream preferably pressure indicator 25 provided, wherein the pressure regulating member 20 upstream pressure indicator 25 a high pressure gauge 26 and the pressure regulating member 20 downstream pressure gauge 25 an operating pressure gauge 27 is. Furthermore, in the gas line 7 To avoid any pressure peaks a safety valve 28 and to prevent the penetration of the water-foaming agent mixture in the compressed gas supply device 3 a check valve 29 , preferably immediately before the gassing device 8th , intended.

In the fumigation device 8th , often referred to as a mixing chamber in such facilities, the pressure-reduced gas stream is introduced into the water provided with the addition, wherein the overpressure of the gas stream is preferably adjustable in a range between 0 bar and 5 bar.

The size of the overpressure is the property of the dispensing device 5 For extinguishing purposes or decontamination purposes applied foam can be influenced, which may be a so-called dry or wet foam depending on the requirements of optimal extinguishing success or decontamination success. It should be noted that with increasing overpressure the foam becomes drier.

The discharge device 5 includes a management system 30 which the gassing device 8th via one or more lines with one or more nozzles 31 combines. The nozzles 31 are formed by spiral nozzles to the agent, in particular the water-foaming agent gas mixture evenly on or discharge. For exact positioning of the nozzles 31 these are preferably arranged pivotably. For the pivotable arrangement of the nozzles 31 For example, a ball joint 32 with the nozzle 31 or with a line of the delivery line system 30 be connected. The ball joint 32 is designed so that the multiphase means is guided inside the ball of the ball joint, so that no additional flexible or movable lines are needed.

In the 2 is another and optionally independent embodiment of the foam system 1 shown, again for like parts, the same reference numerals or component designations, as in the 1 , be used. To avoid unnecessary repetition, the detailed description in the 1 hingewie or referenced.

In the 2 shown schematic representation of an embodiment of the foam system 1 shows the water supply device 2 , the compressed gas supply device 3 , the pipe system 4 , as well as the discharge device 5 which the nozzles 31 , in particular the spiral nozzles. Furthermore, in 2 a control device 33 shown, which is designed for controlling the volume flow and / or the pressure of the multiphase means.

The nozzles 31 are preferred at a distance 34 from a delete object 35 or disposed away from a decontamination object, which is between 0.1 m and 5 m, in particular 1 m and 3 m. It is also possible to have several nozzles 31 on a delete object 35 to achieve a denser application of the foam. For this are the nozzles 31 at the ball joint 32 , which is a tilting of the nozzle 31 allowed in at least two directions. The nozzles 31 create a discharge cone 36 the agent, which is an angle 37 with an upper limit of approximately up to 180 °, in particular 170 °, and a lower limit of approximately up to 15 °, in particular 30 °.

In order to achieve a constant or exact consistency of the agent, the foam system comprises 1 the control device 33 , The control device 33 is via control lines 38 with actuators 39 and sensors 40 connected. The actors 39 include, for example, a gas valve 41 through which the gas volume flow in the piping system 4 or in a section of the pipe system 4 , can be influenced, and one or more controllable metering pumps 42 , which can produce a certain volume flow of water or water-foam mixture.

The to the control device 33 connected sensors 40 are the fumigation device 8th upstream and / or downstream and preferably include flow sensors and / or pressure sensors.

The control device 33 preferably comprises an electronic circuit with microprocessors or microcontroller, a memory unit and / or hard-coded logic modules, by which a control algorithm is realized. The control algorithm can also be implemented by non-programmable logic modules. Furthermore, it is also possible to use a control algorithm without an electronic circuit, for example by pneumatic and / or hydraulic control lines and controls.

Further embodiments provide for the water supply device 2 or parts of these, in particular the tank 10 to form by a pressure vessel or the water supply device 2 and the gas supply facility 3 by a pressure vessel containing a pressurized or foaming when mixed with air foaming agent-water mixture. As a result, for example, more compact and easier to install or dismantle facilities can be provided and costs and components can be saved. By means of a pressure vessel for a foaming agent / water mixture, a ready-mixed means for extinguishing or decontaminating can be provided.

In the 3 becomes the nozzle 31 the dispensing device 5 - 1 - shown. In order to avoid unnecessary repetition, the detailed description in the previous ones will be used 1 and 2 referred or referred.

The nozzle 31 is designed as a spiral nozzle, which at least one spiral guide surface 43 includes. The guide surface 43 is one in charge 44 at least approximately conically converging bore 45 arranged spirally. The, in particular continuous, narrowing bore 45 forms for the agent a flow channel of which over the length 46 the means by means of the spiral guide surface 43 in spray direction 47 is derived. The length 46 is preferably between 1 cm and 6 cm, in particular about 3.5 cm.

The slope 48 the spiral guide surface 43 takes in the direction of the event 44 to and is between 5 mm and 15 mm. In particular, the inclination of the spiral surface increases relative to the central axis 49 around which the spiral guide surface 43 winds, in the direction 44 to. This will also change the angle 50 between central axis 49 and spray direction 47 in the direction of the event 44 smaller.

Furthermore, the nozzle includes 31 also a fixing section 51 , in particular a thread around the nozzle 31 at the event management system 30 - 2 - or on a ball joint 32 - 2 - To attach or connect to this. The thread can be formed by a metric thread, preferably a thread M16 × 1.5 having an outer diameter of about 16 mm and a thread pitch of about 1.5 mm, or a usual thread for pipes, and for example by a 1 / 8-inch thread, a 3/8-inch thread, a 1/2-inch thread, a 3/4-inch thread, a 1-inch thread, a 1-1 / 2-inch thread, a 2-inch thread formed be. For better handling, the nozzle also includes a manipulation section 52 on, which is preferably square or hexagonal shaped and serves better mounting.

When using foam as an extinguishing agent or as a decontaminant, one of the fins may 43 opposite surface as another guide surface 53 be designated. Through the two fins 43 . 53 For example, the foam mixture that exits and expands during emergence is shaped into an outlet cone with a spatially approximately uniformly distributed density.

Another training provides, the nozzle 31 to form by a double-flighted spiral. This results in twice the number of baffles 43 . 53 and the foam can be distributed finer.

The nozzle 31 is preferably made of a copper alloy, in particular brass. Further training provide, the nozzle 31 made of stainless steel, in particular stainless steel, or of a plastic, for example of polyvinyl chloride (PVC) or of a vollflouriertem polymer, preferably polytetrafluoroethylene (PTFE) produce. This allows a long and low maintenance life can be achieved. Furthermore, special sliding properties of the material of the nozzle 31 serve the better flow and distribution of the foam. In particular, the material of the nozzle 31 be selected in view of the electrostatic effect of the nozzle on the foam or the object to be deleted. For this purpose, the nozzle 31 or the event management system - 1 . 2 - with a grounding line 54 - 2 - be connected.

Another form of training provides that the nozzle 31 or the guide surface 43 . 53 antistatic coated and / or made of a material antistatic to the agent. The coating can be, for example, an electrically conductive, for example metallic, layer or a layer formed from surfactants. Thereby, the advantage can be achieved that an electrostatic charge of the nozzle 31 during the passage of the agent can be prevented or reduced. The antistatic coating or antistatic material lowers the surface electrical resistance, prevents the formation of static electricity on the surface and prevents dust from being attracted even when no agent is being dispensed. As a result, the life can also be increased and a more cost-effective maintenance can be achieved.

The surface normals 55 on the guide surface 43 . 53 form with the central axis 49 the nozzle 31 an angle 56 out. Because of the spiral shape of the guide surface 43 . 53 the surface normals 55 the guide surface 43 . 53 to the central axis 49 the nozzle 31 skewed, is under the angle 56 the angle between the corresponding directional vectors of the central axis 49 and surface normals 55 Understood. The angle 56 takes in the direction of the event 44 to. Thereby and through the conical bore 45 the remedy is evenly distributed. The angle 56 between the surface normals 55 the guide surface 43 . 53 and the central axis 49 the nozzle 31 changes, preferably in the direction of discharge 44 , from nearly 0 ° to nearly 90 °, in particular from about 20 ° to about 70 °. This means that the funds are better channeled out and spatially distributed almost evenly.

All Information on value ranges in objective description are to understand that these arbitrary and all subsections of it include, e.g. is the indication 1 to 10 to be understood that all Subareas, starting from the lower limit 1 and the upper Boundary 10 are included, i. all sections start with a lower limit of 1 or greater and end at an upper limit Limit of 10 or less, e.g. 1 to 1.7, or 3.2 to 8.1 or 5.5 to 10.

The embodiments show possible embodiments of the foam system 1 , It should be noted at this point that the invention is not limited to the specifically illustrated embodiments thereof, but rather also various combinations of the individual embodiments are possible with each other and this possibility of variation due to the teaching of technical action by objective invention in the ability of this on this technical Area professional. Individual features or combinations of features from the illustrated and described different embodiments may therefore represent for themselves, inventive or inventive solutions. There are therefore also all possible embodiments, which are possible by combinations of individual details of the illustrated and described embodiment, the scope of protection.

Above all, the individual in the 1 ; 2 ; 3 shown embodiments form the subject of independent solutions according to the invention. The relevant objects and solutions according to the invention can be found in the detailed descriptions of these figures.

Of the For the sake of completeness, let me conclude noted that for a better understanding of the structure of the foam system these or their components partly un-scale and / or enlarged and / or reduced in size.

The the independent one inventive solutions underlying task can be taken from the description.

1

foam plant

2

supply

3

supply

4

line system

5

discharging device

6

pressure line

7

gas pipe

8th

A fumigation

9

water

10

tank

11

water pump

12

admixing

13

additive

14

container

15

metering

16

infuser

17

Compressed gas containers

18

gas bottle

19

Pressure control device

20

Pressure-regulating element

21

Pressure reducing valve

22

control device

23

setting device

24

Reference pressure line

25

pressure gauge

26

High pressure gauge

27

Betriebsdruckmanometer

28

safety valve

29

check valve

30

Discharge conduit system

31

jet

32

ball joint

33

control device

34

distance

35

deleted object

36

exit cone

37

angle

38

control line

39

actuator

40

sensor

41

gas valve

42

metering

43

baffle

44

discharge direction

45

drilling

46

length

47

spray direction

48

pitch

49

central axis

50

angle

51

attachment section

52

Maniupulationsabschnitt

53

baffle

54

ground wire

55

surface normal

56

angle

Claims (13)

Foam plant ( 1 ) for the protection of persons or objects for discharging a multiphase means, which has at least one gas phase, comprising a line system to which at least one discharge device ( 5 ), characterized in that the discharge device ( 5 ) at least one nozzle ( 31 ) with at least one spiral guide surface ( 43 ; 53 ). Foaming installation according to claim 1, characterized in that the line system ( 4 ) a gassing device ( 8th ). Foaming installation according to claim 1 or 2, characterized that these are formed by a CAFS (Compressed Air Foam System) facility is. Foaming installation according to one of the preceding claims, characterized in that the guide surface ( 43 ; 53 ) to one in the direction of the event ( 44 ) at least approximately conically converging bore ( 45 ) adjoins. Foaming installation according to one of the preceding claims, characterized in that the surface normals ( 55 ) of the guide surface ( 43 ; 53 ) with a central axis ( 49 ) of the nozzle ( 31 ) an angle ( 56 ) train. Foam installation according to claim 5, characterized in that the angle ( 56 ) between the surface normals ( 55 ) of the guide surface ( 43 ; 53 ) and the central axis ( 49 ) of the nozzle ( 31 ), in particular from almost 0 ° to nearly 90 °, changes. Foaming installation according to one of the preceding claims, characterized in that the nozzle ( 31 ) pivotable on the pipe system ( 4 ) is arranged. Foaming installation according to one of the preceding claims, characterized in that the nozzle ( 31 ) at a distance ( 34 ) from 0.1 m to 5 m, in particular approximately above, from an extinguishing object ( 35 ) or a decontamination object is arranged distanced. Foaming installation according to one of the preceding claims, characterized in that the nozzle ( 31 ) for producing a discharge cone ( 36 ) of the means is formed, which has an angle between 30 ° and 180 °. Foam system according to one of the preceding claims, characterized in that the line system ( 4 ) a control device ( 33 ) to the Has rules of the volume flow and / or the pressure of the agent. Foam installation according to one of the preceding claims, characterized in that the discharge device ( 5 ), in particular the nozzle ( 31 ), and / or the line system ( 4 ) with a grounding line ( 54 ) connected is. Foaming installation according to one of the preceding claims, characterized characterized in that the multiphase agent is replaced by an extinguishing agent is formed. Foaming installation according to one of the preceding claims, characterized in that the multiphase agent is formed by a decontamination agent is.