WO2019020507A1

WO2019020507A1 - E-extinguishing lance for firefighting in electrically charged objects

Info

Publication number: WO2019020507A1
Application number: PCT/EP2018/069728
Authority: WO
Inventors: Albrecht RESCHKE; Thomas Wille; Matthias Petermann
Original assignee: Murer-Feuerschutz Gmbh
Priority date: 2017-07-24
Filing date: 2018-07-20
Publication date: 2019-01-31
Also published as: CN110958903B; EP3658242B1; PL3658242T3; EP3658242A1; CN110958903A; DE202017104411U1; HUE063730T2; EP3658242C0; ES2958591T3

Abstract

The invention relates to an E-extinguishing lance (10) for extinguishing burning objects, which has a holding section having a grip part (11) for an operator, an extinguishing agent feed having a coupling device (12) for the connection of a pressure hose for liquid extinguishing agent, and a tubular extinguishing section (13) adjoining the holding section and possibly the coupling device, from the free end of which extinguishing agent under pressure can be applied into a burning object, the grip part being electrically insulating for voltages U>100V and the extinguishing section tapering to a point having a narrowed flow cross section for extinguishing agent to be led through, is characterized in that the grip part is also electrically insulating for voltages U≥500V, in that the extinguishing section is made from a material which has a tensile strength Rm that is so high that the material withstands a mechanical stress σ ≥ 500 N/mm2, and which has a melting temperature ts ≥ 650°C, and in that a holding section on the operator-side end has a large area impact plate (14) in extension of the extinguishing section. With this E-extinguishing lance, both minimum requirements relating to protection against thermal hazards and also to protection against mechanical overloads and also to protection against electrical hazards are safely met.

Description

E-fire fighting for firefighting »electrically charged

Qbjekten

The invention relates to an extinguishing lance for extinguishing burning objects, wherein the extinguishing lance a holding portion with handle part for a

Operator, an extinguishing agent supply with coupling device for connection of a pressure hose for liquid extinguishing agent, and a subsequent to the holding section and optionally the coupling device tubular extinguishing section, from the free end extinguishing agent can be applied under pressure in a burning object, wherein the handle portion of the holding portion electrical

Insulating is also designed for electrical voltages U> 100V, the tubular extinguishing section at its free end

geometrically designed tapering, and wherein the tubular extinguishing section at its free end a narrowed clear

Having flow cross-section for the pressure-passed extinguishing medium.

Such a lance is known from US 2002/019307 A1.

Similar lion lances are also in the company catalog of Murer

Feuerschutz GmbH from 05/2016, in particular the "Fog Extinguishing System LS" shown there. Background of the invention

For reasons of environmental and climate protection as well as sustainability, intensive international efforts are currently being made to use more electric energy instead of fossil fuels. In recent years, for example, photovoltaic systems have been increasingly set up, for example on building roofs.

In addition, individual mobility is to be strengthened in the future

electric drive systems, for example by electric vehicles, are made possible.

So far, however, little attention has been paid to the fact that with such increased use of electrical energy also considerable

Danger potentials are connected.

These potential dangers are already increasingly evident in the face of numerous, worldwide fire events due to non-functioning or poorly functioning accumulators, for example in smartphones or notebooks.

A particularly high risk is in fires in the environment of

Electric vehicles, for example, in hybrid or fully electric vehicles, seen (see, for example, "E-Mobil-Brand in the US"; httBs: i / www.

Mobile-Brand-in-the-USA.html (accessed on 09.11.2016)).

Particularly problematic in the fire of such an electric vehicle is that when extinguishing not only significant dangers from the fire and the fire itself and possibly possible self-igniting elements such as lithium-ion batteries emanate, but In addition, even dangers by spreading

High voltages or high currents due to in the vehicle

installed Hochieistungselektrik or -akkumulatoren must be controlled. It is therefore important to prevent this effectively.

In US-A 4,802,535 a fire extinguisher is described in which hardened steel tube as a material for the tubular

Deletion section is proposed. However, whatever electrical insulation of the known extinguishing lance is not

intended.

US 2003/0159837 AI shows a "multi-purpose water hammer" with a tapered nozzle which is intended to penetrate into an object to be extinguished when it is used, the extinguishing head being placed there at an angle of 90 ° on the tubular extinguishing section

hammer-like use of this device in an electric vehicle would then have to be worked very close to the battery to be deleted when driving into the outer shell of the vehicle to

to achieve an effective effect at all. Incidentally, no electrical insulation of the extinguishing lance is again provided or indicated here. In the years 2002 and 2003, it probably has not been thought, as it is nowadays, of vehicles with an electric drive.

In the cited US 2002/019307 AI, although an insulation against electrical voltage when in contact with wires in one

Building wall indicated, but no isolation against high voltage, such as occurs in batteries of e-vehicles. In addition, the extinguishing agent is fed via the end of the known extinguishing lance, so that a lashing of the lance with a percussion tool in a vehicle outer shell should not be possible. Further disadvantages of the prior art

So far, firefighters are limited to dealing with

prepared for such hazards. The article mentioned above, for example, reports that the fires of a

Electric vehicle fighting firefighters had to keep clear distance from the electric vehicle or had to keep, which of course the effectiveness of fire fighting quite considerably

restricts or reduces the amount of firefighting measures known to be beneficial, if not impossible.

In order to deal with such extended dangers, it therefore requires in particular a snubber lance, which is designed not only for the actual extinguishing itself, but both thermal and

mechanical and especially electrical hazards

can withstand. So far, however, it has not yet been possible to provide an extinguishing lance of the type defined at the outset against thermal and / or mechanical hazards as well as additionally with a further function which also ensures that the comparatively strict standards for electrician tools are complied with. So there is always the risk that when deleting live

electrical objects - especially in the wet state of the

Löschanze, which is indeed typical for the case of electrical voltages or currents to an inadmissibly high extent reach the operator, which thereby at

Firefighting operation may be seriously injured. Object of the invention

Object of the present invention is in contrast to provide an extinguishing lance uncomplicated and inexpensive as possible with the simplest technical means, with both minimum requirements for protection against thermal hazards as well as for protection

mechanical overloads as well as to protect against electrical hazards are safely met.

Brief description of the invention

According to the invention, this is not very straightforward in practice.

Task solved in a surprisingly simple as well as effective way by an extinguishing lance of the type defined, which also for

Working under voltage is suitable,

in that the grip part of the holding section is also designed to be electrically insulating for electrical voltages U> 500V;

in that the tubular extinguishing section is made of a material having such a high tensile strength R _m that it has a high tensile strength R _m

withstand mechanical stress σ> 500 N / mm ² , and which one

Melting temperature ts> 650 ° C has;

and by the sheath portion at the operator end a

large-surface impact plate in extension to the tubular

Extinguishing section has.

With the present invention, an E-lance is provided, which completely solves the above-formulated invention task.

In particular, the extinguishing lance according to the invention is the first of its kind, especially for the deletion of installed in electric vehicles

Lithium-ion batteries is suitable. This will be the fire departments now also for such applications, the first effective

Extinguisher provided worldwide.

The large impact plate at the operator end of the

Holding section serves to produce a planar body contact with an operator. By a centrally mounted such

Impact plate is ensured in particular as straight as possible Einschlagen to prevent bending of the lance. In addition, it is also possible for a spacer section to be provided next to the striking plate for the tubular extinguishing section.

In the application, the lance can be introduced, for example, in the battery of a burning electric vehicle. Due to the tip in the foremost area in the way materials, such as a battery wall, can be easily pierced. By such a high-strength but pointed nozzle wear is avoided or at least minimized, whereby the penetration into the surface of the object to be deleted is facilitated.

The flow-restricted nozzle (s) at the tip of the lance also ensure that a sufficient extinguishing success can be achieved quickly and efficiently, and in particular with a relatively low use of extinguishing water.

An alternative option for the direct and safe deletion of an e-vehicle battery, there is currently not at all. The Werkfeuerwehren well-known car manufacturers have in many attempts fires of e-vehicles without the invention E-lance almost not, and if then, then only with the use of extremely much water and foam, but always without effective security for the Firefighter acting against electrical voltages, under

Can get control.

Incidentally, the same applies to the extinguishing of burned-on transformers or electric generators, such as photovoltaic installations.

Bevorzujte _^ From igsfarmen the invention

A particularly advantageous class of embodiments of the E-eradicating lance according to the invention is characterized in that the grip part of the holding portion has a voltage-insulating coating. Thus, even the handle itself provides adequate protection of the operator against electrical voltages

guarantee. Especially preferred are developments of this class of embodiments, which are characterized in that the voltage-insulating coating of the handle part for electric

Voltages U> 1000V, is executed.

In this context, it is advantageous if the voltage-insulating coating of the handle part already at least the

Minimum requirements according to European standards 60903 and / or 659 for insulating protective gloves for working under voltage. It is also advantageous if the voltage-insulating coating of the handle part of heat-insulating, flame-resistant material -is constructed using about aramid and / or para-aramid and also meets the minimum requirements of European Standard 407 for protective gloves against thermal risks. It is particularly advantageous if the voltage-insulating covering of the grip part has a layer thickness d> 2 mm, which makes it technically possible to use it up to 1000 V and even above.

Also preferred are developments of the class of embodiments described above, in which the voltage-insulating coating of the handle part is made of polyvinyl chloride. This ensures a longer life of the coating. Aging phenomena are minimized.

Particular advantages arise in further developments, in which the holding portion under the tension-insulating coating of the handle part made of metal, preferably made of VA steel, in particular

austenitic, acid-resistant 18/10 Cr-Ni steel, is constructed. This is more resistant and particularly resistant to the battery acid.

In a further class of advantageous embodiments of the E-eradicating lance according to the invention, the grip part of the holding section has at least one bow-type grip with hand protection. This allows safe operation and good localization of the battery.

Furthermore, the bow handle serves when hitting the extinguishing object as protection against unwanted deformation of the lance.

The embodiments of this class can be further improved by developments in which the handle portion of the holding portion has two bow handles for a two-handed operation of the E-lance. This ensures safe operation and localization in the deletion object to be invaded. Further advantageous embodiments are characterized in that at the extinguishing agent supply an actuating valve for admitting or stopping a Löschmittelzuflusses in the tubular extinguishing section and the holding portion, preferably on the handle portion, a trigger device for manual control of

Actuating valve are provided.

In a further preferred embodiment of the invention, the tubular extinguishing section is made of metal, preferably of stainless steel, in particular of austenitic, acid-resistant 18/10 Cr-Ni steel. This contributes to an increased mechanical and chemical resistance and thus to a longer durability of the tip. Also preferred are embodiments of the invention E-lance lance, wherein the free end of the tubular

Extinguishing section is tapered design. This allows a particularly straight and light impact into the object. The tapered free end of the tubular extinguishing section may in further embodiments of the invention be made of preferably hardened, austenitic, acid-resistant 18/10 Cr-Ni steel. This choice of material and processing variant

in turn ensures high durability and

Resistance.

Very particular preference is given to a class of embodiments in which the tapered free end of the tubular extinguishing section is designed to be exchangeable. As a result, the lance can also be used for other types of extinguishing agent. Furthermore, so that the tip can be swapped quickly and easily for another when worn. Advantageous developments of this class of embodiments are characterized in that various exchangeable tips, preferably with different geometries, diameters and in particular different materials, are available and can be kept in stock for a wide variety of purposes. As a result, the E-lance according to the invention can be quickly made ready for use again when worn. Also directly in the field of application, the tip can also be swapped quickly.

Also preferred are developments in which the replaceable (n) tip (s) with a screw thread or about a

Bayonet is provided (are), preferably two

Breakpoints for wrenches are available for easy disassembly. As a result, the lance is quickly ready to use again when worn, and in the case of use, the tip can also quickly

it will be exchanged.

In a further class of particularly advantageous embodiments of the E-extinguishing lance according to the invention at least one nozzle for the outlet of pressurized liquid extinguishing agent is integrated into the pointed free end of the tubular extinguishing section, wherein the nozzle is preferably shaped so that they Extinguishing medium optimally injected into the burning object and / or on the

Distributed surface. In this way, only comparatively small amounts of extinguishing agent are required.

In practice, further developments of this class of

Embodiments in which the nozzle has a clear diameter between 30mm and 40mm, preferably about 33.7mm, a length between 25mm and 50mm, preferably about 30mm, and a Width between 15mm and 25mm, preferably 21.3mm. These special dimensions also have production-related advantages.

Finally, other advantageous developments of this class of embodiments are characterized in that three nozzles are provided which are distributed uniformly around the longitudinal axis of the tubular extinguishing section. In this way, in the case of a targeted and uniform penetration of the extinguishing means in the extinguishing object

be ensured.

In practice, embodiments of the extinguishing lance according to the invention, in which the large-area impact plate made of solid material and preferably designed to be interchangeable.

Likewise, embodiments are advantageous which are characterized

characterized in that the extinguishing lance, in particular the striking plate, is divisible. Thus, the extinguishing lance according to the invention can be used very flexible, for example, the fire of a vehicle in their own garage or in the parking garage. In this context, there have been cases of auto-ignition of lithium-ion batteries by the press, which have led to fires in buildings and considerable damage.

Particularly favorable embodiments of the invention, in which the extinguishing lance is designed to be elongated with respect to its longitudinal axis, in particular the impact plate of the holding section on

Operator side end is arranged at a variable distance from the tubular extinguishing section, which is preferably made extendable. Also with this is a higher flexibility in the application reached. With this embodiment, the extinguishing lance is suitable

especially for use with trucks and other large vehicles.

Further features and advantages of the invention will become apparent from the following detailed description of an embodiment of the invention with reference to the figure of the drawing, which shows details essential to the invention, and from the claims. The individual characteristics can each individually for themselves or to several in arbitrary

Combinations in variants of the invention be realized. The embodiments shown and described are not as

but rather have an exemplary character for the description of the invention.

Detailed description of the invention and drawing

The invention is basically rather schematic

held figures of the drawing shown and will be explained in more detail with reference to an embodiment. Show it :

Fig. La is a schematic side view of a first embodiment of the invention E-lance lance;

Fig. 1b shows the embodiment of Fig. La in a partial

transparent view from above in the direction of the axis of the tubular extinguishing section;

2a shows a further embodiment of the invention E-lance lance; Fig. 2b shows the embodiment of Fig. 2a in a vertical

Sectional view from the side;

Fig. 3a is a side view of a punch for applying to the

Impact plate;

Fig. 3b, the embodiment of Figure 3a rotated by 90 ° about the longitudinal axis.

Fig. 4a is a schematic side view of an embodiment of the exchangeable tip;

Fig. 4b, the embodiment of Figure 4a rotated by 90 ° about the longitudinal axis.

FIG. 4c shows the embodiment of the tip of FIG. 4a in vertical section; FIG.

and

Fig. 4d, the nozzle distribution of the tip of Fig. 4a in the enlarged

Detail with view parallel to the longitudinal axis.

In the figures la and lb of the drawing one recognizes one

Embodiment of the inventive electrically insulating E-lance 10 for extinguishing burning objects under electrical voltage. As already known from the prior art

Löschlanzen also has the inventive E-Löschlanze 10 a holding section with handle portion 11 for an operator, a deletion medium supply with a coupling device 12 for connection of a pressure hose for liquid extinguishing agent, and a to the

Holding section and optionally the coupling device 12th subsequent tubular extinguishing section 13, from the free end extinguishing agent under pressure in a burning object

can be applied. In contrast to known extinguishing lances, the E-extinguishing lance 10 according to the invention is distinguished by the fact that the gripping part 11 of the holding section is designed to be electrically insulating for electrical voltages U>500V; that the tubular extinguishing portion 13 is made of a material having a tensile strength R _m so high as to withstand a stress σ> 500 N / mm ² , and having a melting temperature ts> 650 ° C; that the tubular

Extinguishing section 13 is designed tapering at its free end geometrically; and that a holding section at the operator end of a large-scale impact plate 14 in extension to the tubular

Extinguishing section 13 has.

In particular, the handle portion 11 of the holding portion a

voltage-insulating coating, preferably of polyvinyl chloride, having a layer thickness d> 2 mm, which can also be designed for electrical voltages U> 200V, in particular U> 500V, preferably U> 1000V.

The holding portion under the tension-insulating coating of the handle portion 11 is usually constructed of metal, preferably of VA steel, in particular of austenitic, acid-resistant 18/10 Cr-Ni steel. The tubular extinguishing section 13 is likewise made of metal, preferably of stainless steel, in particular of austenitic, acid-resistant 18/10 Cr-Ni steel, as well as the tapered free end of the tubular extinguishing section 13, which is preferably additionally hardened. In the embodiment illustrated in FIGS. 1 a and 1 b, the grip part 11 of the holding section has two bow-type grips 11 II "for two-handed operation of the E-extinguishing lance 10.

The tapered free end of the tubular extinguishing portion 13 is preferably designed as a tapered, preferably replaceable tip 15, wherein for different purposes different exchangeable tips 15, preferably with different geometries, diameters and in particular made of different materials, can be kept. These replaceable tips 15 may be provided with a screw thread not shown in the drawing or a bayonet lock, preferably with two breakpoints for wrenches for easy assembly and disassembly.

In the tapered free end of the tubular extinguishing section 13 are usually at least one, preferably three evenly distributed around the longitudinal axis of the tubular extinguishing section 13 arranged nozzles for the exit of pressurized

liquid extinguishing agent be integrated, the nozzles are preferably shaped so that they optima extinguishing! injected into the burning object and / or distribute on its surface. These nozzles are also not specifically shown in the drawing.

The E-Löschlanze 10 according to the invention can at the Löschmittei- supply a not shown- actuating valve for admitting or stopping a Löstitteizuflusses in the tubular extinguishing section 13 and the holding portion, preferably on the handle portion 11, a trigger device for manual control of this actuating valve. Figures 2a and 2b show in enlarged detail the area around the holding portion with handle portion 11, extinguishing agent supply to the coupling device 12 for connecting a Druckschiauchs for liquid extinguishing agent, as well as to the holding portion and the

Coupling device 12 subsequent tubular extinguishing section 13th

Figures 3a and 3b show in enlarged detail a striking mandrel 16, which may be user-side mounted on the striking plate 14. The attachment can for example by screwing or

Attach, for example by means of a bayonet lock done.

Finally, FIGS. 4a to 4d show, in enlarged detail, an exchangeable tip 15 with nozzles 17 which are arranged distributed about the longitudinal axis.

Claims

claims

Extinguishing lance (10) for extinguishing burning objects,

wherein the extinguishing panel (10) has a holding portion with handle portion (11) for an operator, an extinguishing agent supply with

Coupling device (12) for connecting a pressure hose for liquid extinguishing medium, as well as a to the holding section and optionally the coupling device (12) subsequent tubular extinguishing section (13), from the free end extinguishing medium can be applied under pressure in a burning object, said the gripping part (11) of the holding section is also designed to be electrically insulating for electrical voltages U> 100V, wherein the tubular extinguishing section (13) is geometrically tapered at its free end, and wherein the tubular extinguishing section (13) has a constricted one at its free end having a clear flow cross-section for the pressure-passed extinguishing agent,

characterized,

that the grip part (11) of the holding section is designed to be electrically insulating also for electrical voltages U> 500V;

that the tubular quenching section (13) is made of a material having a tensile strength R _m so high as to withstand a stress σ> 500 N / mm ² , and having a melting temperature ts> 650 ° C;

and that a holding section at the operator end has a large-area impact plate (14) in extension to the tubular extinguishing section (13).

2. extinguishing lance according to claim 1, characterized in that the grip part (11) of the holding portion has a voltage-insulating coating, which is also designed for electrical voltages U> 1000V.

3. extinguishing lance according to claim 2, characterized in that the voltage-insulating coating of the handle part (11) has a layer thickness d> 2 mm.

4. extinguishing lance according to one of claims 2 or 3, characterized

in that the tension-insulating coating of the grip part (11) is made of polyvinyl chloride.

5. extinguishing lance according to one of claims 2 to 4, characterized

characterized in that the holding section under the

stress-insulating coating of the grip part (11) made of metal, preferably of VA steel, in particular of austenitic, acid-resistant 18/10 Cr-Ni steel, is constructed.

6. extinguishing lance according to one of the preceding claims, characterized in that the handle part (11) of the holding portion has at least one bow-shaped handle (11 ', 11 ") with hand protection.

7. extinguishing lance according to claim 6, characterized in that the handle part (11) of the holding portion has two bow handles (11 \ 11 ") for a two-handed operation of the extinguishing lance (10).

8. extinguishing unit according to one of the preceding claims, characterized in that at the extinguishing agent supply a

Actuation valve for admitting or stopping an extinguishing agent inflow into the tubular extinguishing section (13) and on the holding section, preferably on the handle part (11), a trigger device for the manual control of the

Actuating valve are provided.

9. extinguishing lance according to any one of the preceding claims, characterized in that the tubular extinguishing portion (13) made of metal, preferably made of stainless steel, in particular from

austenitic, acid-resistant 18/10 Cr-Ni steel.

10. extinguishing lance according to any one of the preceding claims, characterized in that the free end of the tubular

Extinguishing section (13) is tapered.

11. extinguishing lance according to any one of the preceding claims, characterized in that the tapered free end of the tubular extinguishing section (13) is made of, preferably hardened, austenitic, acid-resistant 18/10 Cr-Ni steel.

12. extinguishing lance according to any one of the preceding claims, characterized in that the tapered free end of the tubular extinguishing section (13) is designed to be interchangeable.

13. extinguishing lance according to claim 12, characterized in that

various replaceable tips (15), preferably with different geometries, diameters and in particular different materials, are present.

14. extinguishing lance according to claim 12 or 13, characterized in that the replaceable (n) tip (s) (15) with a

Screw thread or a bayonet is uss provided (are), and that preferably two breakpoints for

Wrench for easy disassembly are available.

15. extinguishing lance according to any one of the preceding claims, characterized in that in the tapered free end of the tubular extinguishing section (13) at least one nozzle (17) for the outlet of pressurized liquid extinguishing medium is integrated, wherein the nozzle (17) is preferably shaped so that it optimally injects extinguishing agent in the burning object and / or distributed on the surface.

16. extinguishing lance according to claim 15, characterized in that the nozzle (17) has a clear diameter between 30mm and 40mm, preferably about 33.7mm, a length between 25mm and 50mm, preferably about 30mm, and a width between 15mm and 25mm, preferably 21.3mm, has.

17. extinguishing lance according to claim 15 or 16, characterized in that three evenly about the longitudinal axis of the tubular

Extinguishing section (13) arranged distributed nozzles (17) are provided.

18. extinguishing lance according to any one of the preceding claims, characterized in that the large-area impact plate (14) made of solid material and is preferably designed to be interchangeable.

19. extinguishing lance according to any one of the preceding claims, characterized in that the extinguishing lance (10), in particular the

Impact plate (14), divisible is constructed.

20. extinguishing lance according to any one of the preceding claims, characterized in that the extinguishing lance (10) with respect to their

Longitudinal axis is designed to be extensible, in particular, the impact plate (14) of the holding portion at the operator end with a variable distance from the tubular extinguishing section

(13) is arranged, which is designed preferably extendable.