WO2022200153A1 - Löschvorrichtung und verfahren zum betreiben derselben - Google Patents
Löschvorrichtung und verfahren zum betreiben derselben Download PDFInfo
- Publication number
- WO2022200153A1 WO2022200153A1 PCT/EP2022/056915 EP2022056915W WO2022200153A1 WO 2022200153 A1 WO2022200153 A1 WO 2022200153A1 EP 2022056915 W EP2022056915 W EP 2022056915W WO 2022200153 A1 WO2022200153 A1 WO 2022200153A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wall
- extinguishing device
- flow
- area
- flow divider
- Prior art date
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Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
- A62C31/02—Nozzles specially adapted for fire-extinguishing
- A62C31/03—Nozzles specially adapted for fire-extinguishing adjustable, e.g. from spray to jet or vice versa
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/08—Water curtains
Definitions
- the invention relates to a fire extinguishing device and a method for operating the same
- Extinguishing devices differ in terms of function, extinguishing agent, extinguishing effect, application and many other features. In principle, however, it can be stated that the extinguishing agent water is available for most applications. In any case, the function of the extinguishing device is to bring the water into a suitable form in order to obtain an ideal extinguishing effect for the respective application. According to the combustion triangle, quenching can be done via 3 ways:
- Water as the main extinguishing agent basically uses the effect of cooling due to the very high heat of vaporization, i.e. withdrawal of reaction energy. In order to dissipate these enormous amounts of energy, it is therefore necessary to vaporize as effectively as possible. Heat transfer between two materials depends on many factors, but the easiest and most effective heat transfer factor to modify is the effective area. Therefore, with every extinguishing method for cooling the fire object, care must be taken to maximize the effective area.
- an extinguishing device or an extinguishing method can be considered particularly effective if the evaporation of the water and the associated vapor spread displaces the combustion air as a secondary extinguishing effect and thus leads to an extremely fast containment of the fire.
- Solid jet tubes have been known from the prior art for a long time.
- Solid jet tubes as the name suggests, produce a concentrated solid jet, designed in a nozzle-like shape, so that the vectors of the fluid particles are aligned and bundled at the outlet of the jet tube. The effect of this is a large throw distance, which ensures the necessary safety distance from the source of the fire.
- the bundled jet has the major disadvantage that the surface area wetted by the extinguishing water is minimal. As a result, the heat transfer is very low and the extinguishing water can hardly be used for evaporation because the necessary evaporation energy cannot be transferred from the seat of the fire to the medium due to the boundary conditions.
- the consequence of this is what is known as water damage, which means that extinguishing water seeps into lower-lying structures of the source of the fire and damages these areas that were not actually affected by the fire. It is not uncommon for water damage to buildings to exceed actual fire damage.
- Conventional fire hoses use the pressure level of PN 16, this standard is internationally recognized and, with the exception of slight deviations in the hose diameter and the connection technology, is also almost the same.
- the high-pressure hose uses a pressure level of PN40, and is made of a dimensionally stable, pressed fabric hose, similar to a hydraulic hose. The processing of the pressure level is realized exclusively by water-carrying fire engines with integrated built-in centrifugal pumps.
- the water must be routed from the main stage to a secondary stage, which is usually located on the same shaft and consists of a series connection of several impellers.
- a secondary stage which is usually located on the same shaft and consists of a series connection of several impellers.
- Another limitation for the applicability is the special hose system, in the implementation a high-pressure hose is usually realized on a permanently installed hose reel in the vehicle, close to the high-pressure stage. In the application, this means that the fire engine must be placed accordingly close to the source of the fire, commonly realized hose line lengths are 60 - 90 meters here.
- Such designs are generally not found on aerial rescue devices such as turntable ladders or telescopic mast platforms.
- the high-pressure hose has an advantage in terms of the extinguishing effect. It is generally known that a very effective atomization of a liquid medium can be generated by a high exit velocity. No constructive sieve serves as an atomizer, the division of the fluid is realized purely by the ambient medium air. The connection between air resistance and speed is also known, this increases with the square of the flow speed. Twice as high an exit speed generates a 4-fold increase in air resistance.
- High-pressure pipe Due to the massively increased pressure energy, the high-pressure pipe therefore has a higher potential to effectively convert this into kinetic energy at the outlet with a suitable nozzle shape.
- High-pressure solid jet pipes therefore use the above-mentioned effect and can thus ensure efficient extinguishing technology in practice.
- This technology was or is being replaced by the low-pressure jet pipe at the pressure level of PN16. The reason for this are the considerable disadvantages of the high-pressure system as a whole:
- the hollow jet tube was developed, since an essential factor in the atomization theory is the surface area or the circumference of the jet. In principle, it can be determined that every water particle lying on the circumference is hit by an opposite air particle, which generates a frictional force. The connection is therefore clear, the greater the number of frictional contacts, the more effectively good atomization can be achieved, especially at points that are as close as possible to the outlet.
- the high-pressure full jet pipe therefore uses the effect of the high exit velocity, but not the largest possible jet circumference.
- Table 1 shows that with a constant outlet area and thus also a constant outlet velocity (continuity theorem without considering the channel losses) by dividing into several nozzles, a multiple larger circumference and circumferential area can be generated.
- the example calculation shows the change in the bores, starting with a 20 mm bore (standard jet pipe), subdivided into finer bore increments.
- the contact points on the circumference can be increased relatively easily by using several small nozzles, while at the same time the exit speed remains constant (considered friction-free).
- the solution to this problem is to divide the beam into several smaller beams with the same total cross-section. You can look at this with extinguishing lances, where fixed holes are drilled to influence the jetting. The holes are not bundled together to form a jet, but are set at a specific exit angle in order to achieve the best possible development in the fire area. However, the loss of channel entry has a negative effect if the bores are too small.
- an ideal extinguishing device must therefore serve the following effects and functions:
- a hollow jet pipe divides the jet to a set angle by means of an adjustable cone in the middle of the meridian flow.
- Flow-mechanical additions on the housing or cone side which are often used in the form of flow-dividing blades.
- the circular ring surface generated by the overlap is converted into circular sectors, and the circumferential surface of the jet is thus increased.
- the change in momentum or speed of the jet can be modulated. This means that the operator can also change the spray angle of the jet.
- a fragmented hollow jet tube is known from DE 20 2012 012 648 U1, with this solution the jet being adjusted via an adjustable cone on the nozzle.
- the structure is extraordinarily complicated and expensive.
- a range-enlarging fire-fighting nozzle and a corresponding method are known from EP 2 155 401 B1.
- This solution is a combination of a full jet pipe and a jacketed jet pipe, whereby a part, but at least 50% of the water capacity is ejected as a full jet, but the full jet nozzle is surrounded by an annular outlet opening for a jacketed jet.
- the annular outlet opening can be closed and opened with a sleeve.
- An extinguishing device is known from DE 60 2004003 303 T2, in which an extinguishing jet can be modulated with the aid of three different pipe units that can be slid into one another on a main pipe.
- the main pipe of the extinguishing device leads the extinguishing agent to the three adjustable pipe units and has a central cone in the flow path.
- the main pipe is constructed in several parts.
- An additional ball valve is also required if the device is to be shut down.
- the disadvantage here is that the structure is complex and simple and intuitive use is not possible.
- the object of the invention is to provide an extinguishing device that is simple in construction, provides the user with a high level of safety and is effective in fighting fires.
- a further object is to create a method for operating the extinguishing device with which simple, safe and reliable operation can be guaranteed.
- the device according to the invention can be used as a complete fire-fighting device that can be used on its own. However, it can also be part of a more complex device and in particular part of an intruding or invasive fire fighting device (e.g. lance for piercing walls), i.e. a fire extinguishing lance can be further developed with the construction principle according to the invention.
- an intruding or invasive fire fighting device e.g. lance for piercing walls
- a fire extinguishing lance can be further developed with the construction principle according to the invention.
- the device according to the invention has a more compact and simple structure, thereby saving weight and costs.
- the known design principles are abandoned and the cone that is usually movable for momentum change and beam expansion is provided as a fixed component
- the housing edge of the device which interacts with the cone, is designed to be axially movable, in contrast to known solutions.
- the first effect to be observed is the possibility of an ideal flow-guiding geometry in the nozzle segment of the jet pipe. Due to the static wall, this can ensure a low-turbulence flow path, which is difficult to implement with a hollow jet pipe due to the internal adjustment mechanism.
- the flow divider is therefore designed as far as possible without abrupt pulse changes through the component wall and ensures a smooth flow at the outlet.
- the second great advantage achieved by the invention lies in the massive reduction of the modulating housing element.
- This can be designed as a bush, for example, and have a conical sealing surface. Due to the conical sealing surface, which is set relatively slightly differentially to the outlet angle of the flow divider, the outflowing jet can be formed very smoothly. When executed correctly, the fluid breaks off sharply with a smooth jet and can be injected into the fire area with almost no friction losses.
- the external adjusting device therefore means that no further moving components are required between the fluid and the adjusting apparatus and enables a simpler construction.
- the device according to the invention with the adjusting mechanism can be of particular advantage in the case of fire extinguishers with a penetrating function.
- the casing tube is small and cylindrical and, as a slim design, can implement very efficient atomization in conjunction with invasive extinguishing techniques.
- a casing tube atomization can therefore be seen both as an independent atomization unit for extinguishing devices of all kinds, or as an independent extinguishing device and as the means of choice for the atomizing device of an invasive extinguishing device.
- the casing tube is hydraulically shaped in such a way that a complete tube flow is divided into an annular flow. It is within the meaning of the invention that the turbulence is kept as low as possible. The fluid is accelerated by this splitting.
- the proportionate high-velocity flow path is kept as short as possible, but not so short that the flow cannot traverse the structure smoothly. During this process, the flow is simultaneously accelerated to the targeted exit speed, because the exit speed is directly proportional to the atomization quality according to the previous statements.
- the next step in guiding the flow is to redirect the flow from the axial direction to the radial direction as continuously as possible.
- a parabolic wall is particularly suitable for guiding the flow evenly. The areas described should therefore take the shortest possible route to reduce friction and can therefore overlap in terms of design.
- the greatest flow rate is also generated in this position.
- the angle is defined by a person skilled in the art during design and must be empirically matched to the opposing flank.
- the maximum opening position is that obtained by retraction of the actuator. It is a major advantage that a kind of “panic position” is created at the largest position opening and a protective jet is formed for the operator. This large-area jet is therefore a kind of "man protection shower” and unfolds as soon as the pipe is opened to the maximum. It is therefore only necessary to move backwards, and a possible panic reaction by the operator always leads to a protective position. Since, in the event of panic, the operator tends to retreat rather than advance, there is an emergency logic that reliably protects the operator. Even if the operator falls backwards, the jet produced is a shielding jet that acts as a shield around the operator against smoke and flame effects
- the extinguishing device according to the invention can be operated intuitively and, in the retracted "panic or defense position" of the control element, leads to a wide, umbrella-like jet that delimits the room and prevents the intake of combustion air and, as already mentioned, protects the emergency services from streaks and hot smoke gases .
- the device according to the invention therefore makes use of the effect that this protective shield is built up automatically in the panic position, while a known hollow jet pipe ensures this only by means of several handles which go against intuition.
- outlet velocity and the flow rate are dimensioned from the lowest contact angle and can decrease as the jet diameter increases.
- the flow rate is increased by reducing the kinetic energy. This effect is of great advantage because a larger jet diameter also covers a larger area.
- the surface area of the cone is therefore the product of the radius and the chord length, but the effective depth and radius increase with the angle of attack, which leads to a quadratic relationship via the angle of attack. Due to this enormous increase in area, the Increased wetting contact of the fluid particles, thereby compensating for the reduced exit velocity.
- the device according to the invention thus has, with correct dimensioning, a purely mechanical self-regulation, which has optimal fog formation and extinguishing water quantity delivery for every jet angle.
- the opening characteristics of the jacket tube can be determined in relation to the exit area, which is thus enlarged, via the channel width of the support vanes.
- a complex hollow jet pipe which has a large number of components, is almost completely replaced by 2 simple components.
- the outlined automatic regulation of wetting area and flow rate is an advantage of the invention that is not realized in any known extinguishing device.
- An extinguishing device must therefore have at least one static connection between the flow divider and the housing, while the number of these can vary at will and design.
- the support blades can be designed with airfoil profiles. In this way it can be achieved that the friction of the channels can be reduced to a very low level in comparison to known mist nozzles through bores. It is thus possible to greatly dampen the duct entry vortex and the duct exit vortex, so that a homogeneous fog pattern is achieved.
- the extinguishing device according to the invention in the form of the casing tube is ideally suited for extinguishing close to the source of the fire.
- a further advantageous embodiment also extends the application to radiant tube areas. For this purpose, an additional switching position and a corresponding constructive extension are provided in order to obtain a good throw.
- the fluid In order to be able to realize the low angle range of 0 to approx. 40 degrees of opening angle in addition to the above-described opening angle range of approx. 40 to 180° of the exiting jet, the fluid must be guided with a different structure.
- the application of the extinguishing device according to the invention is to be seen as a single solution and not in connection with an extinguishing lance, but rather in extinguishing technologies which are intended to achieve a large throw range.
- the extinguishing device according to the invention is designed with an extended attachment jet nozzle.
- the attachment jet nozzle is only subjected to flow when the extended flow path through this nozzle is required.
- the fluid is introduced via the flow divider through a bypass path in the casing pipe into the extended attachment jet nozzle.
- the medium is bundled again and formed into a light hollow jet.
- the range in the low focal range can be modified by the jacket tube, in which the same changes the deflection angle of the outlet nozzle by slight axial displacements.
- the device according to the invention in the form of jacket tube atomization can be designed to be handled similarly to a hollow jet tube.
- the main advantage is the operation, because the modulation and the shut-off can be carried out with the main operating lever or with the axial adjustment of the casing tube. If the lever is pushed all the way forward, the device is locked.
- the advantage of the invention is that an extinguishing device is created with which fires can be reliably fought both in the near and far range, with significantly improved occupational safety being created for operators and handling being improved and designed intuitively.
- the invention thus relates in particular to an extinguishing device having a support tube and a jacket tube that can be displaced axially on the support tube, with a flow divider assembly being present on the support tube and comprising a flow divider cone, the flow divider assembly forming a ring-like outward-pointing orifice, the Casing tube with a front edge over the mouth this can be moved to close or open, so that a fluid flow entering the flow divider assembly from the support tube is divided into an annular flow and is directed outwards to the mouth.
- a development provides that all flow-guiding components have a coaxial cylindrical shape in cross section.
- the flow divider cone has a cone wall which runs parabolic from a tip protruding axially from the front into the flow path of the fluid, the flow divider cone being firmly connected to a tubular wall via guide vanes, the cone wall, the tubular wall forming the flow path limit and in the area of the guide vanes the flow path is additionally divided into several flow paths.
- a further development provides that the wall of the flow divider assembly narrows the flow path in the manner of a nozzle, with the diameter increasing again after a region of closest approximation or narrowing and forming a funnel-like wall section which circumferentially delimits the mouth.
- a further development provides that the flow divider cone protrudes axially into the funnel-like area or the funnel-like opening, which is delimited by the wall, into the space delimited by the wall, with the flow divider cone extending with a tip over the area of greatest approximation of the Wall also extends into the tubular interior.
- peripheral ring-like opening is delimited by the funnel-like wall section in the axially rear area and by the cone wall in the axially front area.
- the front edge of the jacket tube has a conical sealing surface in the form of a sloping wall, which runs inwards and axially backwards from an outer peripheral edge of the jacket tube to an inner peripheral edge.
- the flow divider assembly has a corresponding conical sealing surface on the flow divider cone in the form of a sloping wall section that runs from an area of the greatest radial extent of the flow divider cone to a circumferential cylindrical step, with the walls running in the same direction.
- the rectified walls have an angle of inclination which is different and in particular more steeply inclined in relation to the walls delimiting the mouth, in order to be able to bring about a change in momentum.
- the jacket tube is designed to widen towards a front end diametrically or axially opposite a rear end of the extinguishing device, with a circumferential, radially continuous slot being present in the widened area obtained in this way, with the widening on the inside of the widened
- a bulge is formed in the area, the wall of the flow divider cone running parabolic up to the area of greatest extent, in order then to diverge in a convex curve, wherein the area between the greatest expanse and a front edge of the wall and the bulge jointly define a hollow jet flow path in the Limit the hollow jet position of the extinguishing device.
- a further development provides that the front part of the widened area is arranged with the struts spanning the slot 18 on the casing tube.
- a further development provides that the diameter of the area of the greatest extent of the flow divider cone ends with the wall or has the same diameter, so that the area can be passed over by the casing pipe and in particular by the edge in order to close the mouth.
- a further development provides for a wall section to be arranged at a distance from the conically running, sloping wall of the jacket tube by the webs, which runs radially or slightly curved, with a circumferential wall section extending from the inside of the wall, with which the expanded area has an inner circumference, which corresponds to the outer circumference of the area of greatest extent, so that the areas or the wall can slide on the wall in the area in a form-fitting but axially displaceable manner.
- a further development provides that the front part with the bulge widens from an inner peripheral edge, which is a little distanced axially from the wall, and then narrows towards the front to a peripheral edge, the course of the bulge essentially corresponding to the course of the Wall follows and thus the wall section between the inner peripheral edge and the front peripheral edge and in particular the bulge forms an outer wall of a hollow jet flow path.
- a further development provides that the hollow jet flow path is formed in the extreme rearward position of the jacket tube by the edge of the front part of the jacket tube and the edge of the wall of the funnel-like section being flush with one another and thus the mouth being closed off by the curvature and the wall of the flow divider cone is continued and the flow path is deflected annularly in cross-section in an axial direction.
- a further development provides that the hollow jet position is blocked by a barrier which the user has to overcome by means of an additional manipulation.
- a further development provides that a connection for coupling to a hose carrying extinguishing agent is present at a rear end of the extinguishing device.
- the extinguishing device has a lighting device arranged in the flow divider assembly at a front end.
- a further aspect of the invention relates to a method for extinguishing using an extinguishing device as described above, the opening and closing and modulation of the extinguishing jet being effected by a displaceable jacket tube.
- a further development provides that the flow rate of extinguishing agent through the opening of the cross-section of the mouth induced with the casing tube is adapted to the enlarged distribution funnel by reducing the kinetic energy.
- a further development provides that a man protection jet running outwards like an umbrella is set by opening the muzzle to the maximum extent by means of the jacket tube.
- jet cone is modulated and, in particular, narrowed and directed forwards by the advancement of the jacket tube.
- a further development provides that the radial flow path is deflected into an annular axial hollow jet which is directed forwards by a maximum retraction of the casing pipe, in particular beyond a barrier, with a corresponding hollow jet flow path being formed by the casing pipe and the flow divider assembly.
- Figures la-le the extinguishing device according to the invention in one embodiment in five views;
- Figures 2a-2g the flow divider assembly of the invention
- Erasing device in one embodiment in several views and sections;
- FIG. 3 the extinguishing device according to the invention with a partial longitudinal section in the area of the flow divider assembly in a man-protection jet position;
- FIG. 4 the device according to FIG. 3 in a position in which the extinguishing water cone is directed forward
- FIG. 5 the extinguishing device according to the invention in a hollow jet tube position
- FIGS. 6a-6c the flow divider assembly with jacket tube in an open extinguishing jet position
- FIGS. 7a-7c the flow divider assembly with casing pipe in a man-protecting jet position
- Figures 8a-8c the flow divider assembly with jacket tube in a position in which the extinguishing jet is directed forwards in a cone;
- Figures 9a-9c the flow divider assembly and mandrel in a more forward jet position
- Figures 10a-10c Flow divider assembly and mandrel in an almost closed
- FIG. 12 the extinguishing device in the area of the flow divider assembly, partially in section, in a closed position
- FIG. 13 the extinguishing device according to the invention in a partially sectioned view, showing the course of the flow and the operating lever position in hollow jet pipe operation;
- FIG. 14 the extinguishing device according to the invention in an extinguishing position in which a conical extinguishing jet is achieved
- FIG. 15 the extinguishing device according to the invention in a man-protection beam position
- FIGS. 16a-16b the course of the flow of the extinguishing agent of the flow divider assembly with the jacket pipe open.
- the extinguishing device 1 according to the invention has a hollow-cylindrical support tube 2 , a handle 3 being arranged on the hollow-cylindrical support tube 2 .
- the support tube 2 has a hose connection coupling 5 at a rear end 4 for coupling a conventional fire hose.
- the extinguishing device 1 has a casing tube 6 which is displaceably arranged on the support tube 2 and has an inside diameter which corresponds approximately to the outside diameter of the support tube 2 .
- the axially displaceable casing tube 6 has a longitudinal recess 7 on the underside adjacent to the end 4 for the handle 3 to reach through.
- An actuating lever 8 is also present.
- the actuating lever 8 has a rectangular profile with an upper cross brace 9, two longitudinal braces 10 extending perpendicularly at their ends, which are connected by the cross brace 9 and two short cross braces 11 in the area of the handle 3. With the short cross braces 11, which have a space between them limit, which corresponds to the width of the handle 3, the actuating lever 8 is arranged pivotably on the handle 3 by means of a shaft 12.
- shaft stubs 13 protrude laterally on the jacket tube 6, with the shaft stubs 13 extending laterally away from an outer jacket surface 14 of the jacket tube 6 and resting in a longitudinal recess 15, which can be seen in the parallel longitudinal struts 10.
- a pivoting movement of the handle 3 around the shaft 12 thus results in the jacket tube 6 being displaced axially on the support tube 2 via the shaft stubs 13 , with the shaft stubs 13 being able to slide along in the longitudinal recesses 15 .
- this embodiment on the jacket tube 6 has an extension with a step 17 on the outside Stage 17 is a circumferential, radially continuous slot 18 which divides the front part 19 of the jacket tube 6, but the front part 19 and the jacket tube 6 are connected to the slot 18 bridging webs 20.
- a cavity 21 protruding inwards, with a lighting device 22 having a corresponding optical system being inserted in the cavity 21 .
- the cavity 21 or the lighting device 22 is surrounded by a radial wall 23, which belongs to a flow divider assembly 27, which will be illustrated later.
- An annular outlet channel 25 for a hollow jet of extinguishing agent is formed between the wall 23 and a free peripheral edge 24 .
- a flow divider assembly 27 is screwed onto the support tube 2 at the front (FIG. 3) inside the jacket tube 6 .
- the flow divider assembly 27 (Fig. 2) has a housing 26 with a hollow-cylindrical connection area 28 with a cylinder wall 29 and an external thread 30 on the cylinder wall 29.
- the external thread 30 is designed in such a way that it can be screwed into an internal thread 31 of a connection area 32 of the support tube 2 ( Figure 3).
- the support tube 2 has the front connection area 32 with a front peripheral edge 33.
- the flow divider assembly 27 or the housing 26 of the same widens after the external thread 30 with a step 34 to an outside diameter that corresponds to the outside diameter of the support tube 2 .
- the step 34 extends radially outwards and serves as a stop for the front peripheral edge 33 of the support tube 2. Adjacent to the step 34 there may be a groove 35 between the step 34 and the external thread 30 for receiving a seal.
- the housing 26 continues with a cylindrical outer wall 36 to a front peripheral edge 37, with a peripheral groove 38 adjacent the front peripheral edge 37 to accommodate a seal. Between the groove 38 and the step 34, the wall 36 is provided with recesses 39, wherein the recesses 39 can run transversely to the longitudinal direction and delimit webs 40 between them.
- the openings 39 and ridges 40 result in a cage-like arrangement.
- the jacket wall 29 divides in the area of the step 34 to form the outer cylinder jacket wall 36 and an inner nozzle wall 41.
- the nozzle wall 41 runs from the step 34 or from the groove 35 converging to an area of greatest approximation 42. Expanded from there the nozzle wall 41 becomes very funnel-like with a funnel-like wall section 43 up to the front peripheral edge 27, where the nozzle wall 41 correspondingly reunites with the cylinder wall 36, approximately in the area of the peripheral groove 38. This forms a funnel-like widening orifice 45
- the axial length of the converging nozzle wall 41 corresponds to approximately 4 to 5 times the axial length of the funnel-like wall section 43 of the nozzle wall 41. Accordingly, there is a cavity 44 between the cylinder wall 36 and the nozzle wall 41, which cavity is accessible through the openings 39.
- the cylinder wall 36 is used to guide the jacket tube 6 and the openings 39 or the cavity 44 between the cylinder wall 36 and the nozzle wall 41 is used to save weight. Instead of a cavity 44, this area could also be machined from solid.
- a flow divider cone 46 protrudes from the peripheral edge 37 into the funnel-like area or the funnel-like opening 45 of the housing 26, which is delimited by the wall 43, into the space delimited by the wall 41, the flow divider cone 46 having a tip 50 extends beyond the area of closest approach 42 of the wall 41 into the interior.
- the flow divider cone 46 is connected to the housing 26 with webs which are connected to the wall 41 or 43 as guide vanes 47, so that flow channels 51 are formed between the webs 47.
- the flow divider cone 46 is hollow and has a cone wall 48, which widens concavely or parabolically from the tip 50 to the outside, up to an area of greatest expansion 49, in which the flow divider cone 46 has an outer diameter that corresponds to the outer diameter of the Wall 36 corresponds. From the area of greatest extent 49, the flow divider cone 46 tapers a little, in order then to extend again with a significantly smaller diameter and a very slight widening to the front peripheral edge 23.
- the flow divider cone 46 or its wall 48 runs from the area of greatest convergence 42 or constriction of the wall 41 approximately parallel to the funnel-like wall 43 of the nozzle wall 41. This forms an annular channel as a nozzle and the mouth 45 as an annular gap mouth.
- FIG. 6 - 11 An embodiment of the extinguishing device is shown in Figures 6 - 11, in which a man-protection jet and a forward-directed, cone-like firefighting jet are possible, with the embodiment also being able to be used in invasive extinguishing devices, in which case the flow splitter cone 46 may then be used connect other components that serve to penetrate or penetrate walls, roofs, doors and the like.
- the jacket tube 6 has no circumferential slot and no expansion step 17, but ends with a circumferential outer sharp edge 53.
- the flow divider cone 46 ends in the area of greatest extent 49 with a short cylindrical wall section 54, the flow divider cone 46 having an outer diameter in the area of the short cylindrical wall section 54 which terminates with the outer diameter of the casing tube 6.
- the short cylindrical wall section 54 is followed by a conical, sloping, circumferential wall section 55, which has an inclination that corresponds to the inclination of a sloping closing wall section 56 of the jacket tube 6 from the sharp outer circumferential edge 53 to an inner circumferential edge 57 that is set back from this.
- the conical, sloping circumferential wall section 55 of the flow divider cone 46 ends in a concentric, short cylindrical wall section 58, which forms a step to the cone wall 48, which then runs correspondingly parabolic.
- the circumferential cylindrical wall 58 or step 58 has an outer diameter that corresponds to the outer diameter of the wall 36 of the flow divider assembly 27 corresponds.
- FIG. 6 shows a position of the jacket tube 6 in which the oblique wall section 56 or its inner peripheral edge 57 terminates with the front peripheral edge 37 of the flow divider assembly.
- extinguishing agent usually water
- the support tube 2 can enter the flow assembly 27 through the support tube 2 (omitted from Figures 6-11 for the sake of clarity). Due to the fact that the nozzle wall 41 tapers conically up to the area of closest approximation 42, the increases
- Flow divider cone protrudes with its tip 50 in the tapering area between the nozzle walls 41.
- the guide vanes 47 delimit the flow channels 51 between them, as a result of which the flow rate is further increased, since the available flow path is limited on the one hand and on the other hand the flow channel is narrowest in this area.
- the guide vanes 47 can themselves have a profile, for example an airfoil profile, in order to influence the flow accordingly.
- the cone wall 48 of the flow divider cone is advantageously designed to be parabolic all the way around, so that the flow is directed evenly.
- the flow divider assembly 27 is thus the Tube flow coming from the support tube 2 divided by the flow divider cone 46 in an annular flow towards the mouth 45. Due to the harmonious shape of the parabolic wall 48 of the flow divider cone 46 on the one hand and the course of the wall of the nozzle wall 41, particularly in the area of the funnel-like wall section 43, turbulence is kept to a minimum.
- the fluid is accelerated by the splitting, whereby the proportional flow path is kept quite short with high speed. During this process, the flow is accelerated to the targeted outlet velocity.
- FIG. 7 shows a configuration in which the jacket tube 6 is pulled back far. This is the man protection jet position, in which a jet of extinguishing water is accelerated essentially radially outwards.
- the peripheral outer sharp edge 53 of the jacket tube 6 is pulled back to such an extent that the exiting jet is not deflected forward by this edge or the wall 56 .
- a corresponding headlight or lamp 22 can of course also be arranged in the cavity 21, possibly with a lens, so that the operator can use a light cone directed in the fighting direction even in the dark or with poor visibility can.
- a significant advantage of this lighting arrangement is the resulting reflection or conduction of the light beam through the extinguishing water, which conducts the photons much better than dense fire smoke.
- FIGS. 6a-11b is an embodiment with which, in addition to a man-protection jet, a cone-shaped, forward-directed firefighting jet is also possible.
- a man-protection jet a cone-shaped, forward-directed firefighting jet is also possible.
- an extreme atomization of the beam is achieved by the appropriate design, so that the largest possible Surface of the fluid is created, which is available for evaporation and in this respect very quickly lowers the temperature in a fire room on the one hand, and on the other hand limits the amount of extinguishing agent so much that water damage can be minimized.
- such an embodiment is also suitable for use in invasive fire-fighting systems, in which case devices would be attached to the flow divider cone 46 in a forward direction, with which a wall delimiting a fire area, for example, a door, a roof structure or similar can be penetrated, so that at the moment when the penetration has taken place, a firefighting can take place within the fire room by the jacket pipe atomization according to the invention, provided that the extinguishing device protrudes deep enough into the fire room so that the corresponding jet can unfold in the fire room.
- this device can also be used, as shown, as a fully-fledged fire-extinguishing device with jacketed tube atomization.
- the flow divider assembly 27 is used according to Figures 2a-2g.
- the wall 48 of the flow divider cone 46 runs parabolic up to the area 49 of the greatest extent, in order then to diverge in a curve, in order then to diverge outwards again.
- the area between the largest extension 49 and the leading edge 23 of this embodiment forms an inner peripheral wall of a hollow jet position.
- the jacket tube 6 has a front part 19 which is arranged on the main body of the jacket tube 6 via struts 20 .
- the struts 20 are located radially aligned with the webs 47 designed as guide vanes between the flow divider cone 46 and the nozzle wall 41. However, they can also be offset thereto.
- the area of greatest extent 49 of the flow divider cone 46 ends with the wall 36 from the perimeter, so that the area 49 can be run over by the casing tube 6 and in particular by the edge 57 in order to close the orifice 45 .
- a wall section 61 is arranged at a distance from the sloping wall 56 of the jacket tube 6 by the webs 20 and runs radially or slightly curved, with a circumferential wall section 62 extending from the wall 61 on the inside, with which the front part 19 has an inner circumference which corresponds to the outer circumference of the area of greatest extent 49, so that these areas or the wall 62 on the wall 48 in the area 49 form-fitting, but axially displaceable, can slide.
- the front part 19 widens with a bulge 64 and then narrows forwards to the peripheral edge 34.
- the wall section between the inner peripheral edge 63 and the front Circumferential edge 34 and in particular the bulge 64 forms an outer wall of a hollow jet flow path.
- the extinguishing agent flows, as in the other embodiment described, and is divided accordingly by the flow divider cone 46 into an annular flow, which in this position flows out of the annular orifice 45 and onto the wall 61 of the advantage 19 bounces and is deflected radially outwards.
- the operating lever 8 is blocked against being pulled back further in order to reliably reach this man-protection jet position in the event of a panic. If the operating lever 8 is moved further forward, a beam modulation results which is comparable to the other embodiment described above and produces a cone beam directed forward.
- the wall 56 terminates with the funnel-like wall section 43, the flow divider assembly 27, which delimits the mouth 45 on the outside and thus extends the mouth 45, as it were Beam is directed outwards in front.
- FIG. 5 shows a hollow jet position which can be achieved with this embodiment.
- the operating lever 8 and thus the casing tube 6 must be pulled backwards beyond the panic position, whereby this is preferably only possible if the lever is moved by suppressing release or by pulling a braid over an otherwise insurmountable lock in order to prevent this position is to be achieved in the event of a panic or emergency.
- the edge 63 of the front part 19 and the edge 37 of the flow divider assembly 27 are flush.
- the closed position (FIG. 12) is reached when the lever 8 is pushed all the way forward, since the edge 57 of the jacket tube 6 runs over the area of greatest extent 49 and thereby the mouth 45 is completely shut off to the outside.
- FIG. 13 shows the flow path in the man-protection jet position in a highly schematic manner. It is immediately apparent how an annular flow is brought about by the nozzle wall 41 in the flow divider assembly 27 on the one hand and the flow divider cone 46, with an impact on the wall 61 taking place so that the jet is deflected radially outwards.
- the jet position is shown as a conical jet forward, in which the casing tube atomization allows particularly good firefighting in the close range and good atomization with a good throw range is achieved, the position corresponding to the position in FIG.
- FIG. 15 shows the forward-facing hollow jet position, with the corresponding flow paths of the outflowing extinguishing water.
- Figures 16a and 16b show the flow path in the flow divider assembly 27 past the tip 50 of the flow divider cone and through the flow channels 51 to the orifice 45 and thence outwards. The splitting of the beam can be seen again clearly in the enlarged detail according to FIG. 16b.
- the advantage of the invention is that an extinguishing device is created which is simple in construction and reliable.
- the quenching device consists of few parts, whereby the fact that the flow divider assembly is designed in one piece and in particular the flow divider cone cannot move ensures an optimal flow result. Perfect atomization of the jacket tube can be achieved via the jet modulation according to the invention with the jacket tube, which ensures highly effective fire fighting with the greatest possible safety for the operator. Due to the fundamentally simple structure, maintenance and repairs are also easy.
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Nozzles (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
- Measuring Volume Flow (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2023558707A JP2024512062A (ja) | 2021-03-23 | 2022-03-17 | 消火装置およびその操作方法 |
EP22716184.1A EP4313323A1 (de) | 2021-03-23 | 2022-03-17 | Löschvorrichtung und verfahren zum betreiben derselben |
KR1020237036162A KR20230157510A (ko) | 2021-03-23 | 2022-03-17 | 소화 장치 및 이의 작동방법 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE102021107241.7 | 2021-03-23 | ||
DE102021107241.7A DE102021107241A1 (de) | 2021-03-23 | 2021-03-23 | Löschvorrichtung und Verfahren zum Betreiben derselben |
Publications (2)
Publication Number | Publication Date |
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WO2022200153A1 true WO2022200153A1 (de) | 2022-09-29 |
WO2022200153A9 WO2022200153A9 (de) | 2023-05-19 |
Family
ID=81307494
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/EP2022/056915 WO2022200153A1 (de) | 2021-03-23 | 2022-03-17 | Löschvorrichtung und verfahren zum betreiben derselben |
Country Status (5)
Country | Link |
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EP (1) | EP4313323A1 (de) |
JP (1) | JP2024512062A (de) |
KR (1) | KR20230157510A (de) |
DE (1) | DE102021107241A1 (de) |
WO (1) | WO2022200153A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6039269A (en) * | 1998-10-15 | 2000-03-21 | Premier Farnell Corp. | Coanda effect nozzle |
EP1106212A1 (de) * | 1999-12-07 | 2001-06-13 | Pok | Feuerlöschdüse |
EP1498155A1 (de) * | 2003-07-18 | 2005-01-19 | Yone Corporation | Feuerlöschdüse |
DE202012012648U1 (de) | 2012-08-11 | 2013-08-30 | Dieter Mühlenbruch | Fragmentierendes Hohlstrahlrohr |
EP2155401B1 (de) | 2007-05-30 | 2016-07-06 | Tyco Fire & Security GmbH | Bereichserweiterte feuerbekämpfungsdüse und entsprechendes verfahren |
-
2021
- 2021-03-23 DE DE102021107241.7A patent/DE102021107241A1/de active Pending
-
2022
- 2022-03-17 JP JP2023558707A patent/JP2024512062A/ja active Pending
- 2022-03-17 WO PCT/EP2022/056915 patent/WO2022200153A1/de active Application Filing
- 2022-03-17 EP EP22716184.1A patent/EP4313323A1/de active Pending
- 2022-03-17 KR KR1020237036162A patent/KR20230157510A/ko unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6039269A (en) * | 1998-10-15 | 2000-03-21 | Premier Farnell Corp. | Coanda effect nozzle |
EP1106212A1 (de) * | 1999-12-07 | 2001-06-13 | Pok | Feuerlöschdüse |
EP1498155A1 (de) * | 2003-07-18 | 2005-01-19 | Yone Corporation | Feuerlöschdüse |
DE602004003303T2 (de) | 2003-07-18 | 2007-04-05 | Yone Corp. | Feuerlöschdüse |
EP2155401B1 (de) | 2007-05-30 | 2016-07-06 | Tyco Fire & Security GmbH | Bereichserweiterte feuerbekämpfungsdüse und entsprechendes verfahren |
DE202012012648U1 (de) | 2012-08-11 | 2013-08-30 | Dieter Mühlenbruch | Fragmentierendes Hohlstrahlrohr |
Also Published As
Publication number | Publication date |
---|---|
JP2024512062A (ja) | 2024-03-18 |
DE102021107241A1 (de) | 2022-09-29 |
KR20230157510A (ko) | 2023-11-16 |
WO2022200153A9 (de) | 2023-05-19 |
EP4313323A1 (de) | 2024-02-07 |
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