EP1023110B1 - Automatic fire extinguishing device incorporated in a railway convoy - Google Patents

Abstract

The invention concerns a railway convoy C comprising a tank-and-pump car (1) wherein are located an extinguishing-liquid (3) reservoir (2) and a motor-driven compressor (5) which delivers the extinguishing liquid into conduits (12, 13, 15, 15a) terminating in sprinklers (16 and 18), located in the railway cars (10) carrying road vehicles or goods. When a fire starts at any point in one or several cars (10) the device which is permanently operational is immediately automatically triggered, even during the train journey and before the train can receive external assistance. The invention is useful for protecting piggy back traffic against fire.

Description

The present invention relates to an automatic fire extinguishing device occurring on a railway train.

The technical field of the invention is that of the fight against fires aboard a railway convoy

Patent Application GB 2,139,495 A (Total Walther Feuerschutz) describes an automatic fire protection device for vehicles equipped with a compressed air system which is particularly adapted to equip an underground train made up of several hitched passenger cars. . The device comprises a tank, common to several cars, which contains an extinguishing material under pressure of air and a pipe connecting this tank to sprinklers (sprinklers). The compressed air contained in the reservoir comes from the compressed air circuit fitted to the vehicle, in particular the braking circuit. A supply duct of the compressed air tank is equipped with a non-return valve to ensure automatic filling of said tank with compressed air. The extinguishing material transport pipeline (consisting of salt water) is divided into several branches, feeds the sprinklers of the various vehicles of the train and has a flexible connection between two vehicles.

This system has drawbacks.

First of all, the use of compressed air as the sole means of propelling the extinguishing liquid is not compatible with a tank of sufficient capacity to ensure effective operation of the fire-fighting device. Such a tank, resistant to the pressure required, is, in addition, too large a space to be implanted in a passenger vehicle. Then, the use of the compressed air of the braking circuit is likely to seriously disturb the operation of said circuit, mainly by excessive withdrawal of compressed air: it is indeed impossible to predict in advance how many sprinklers 'will open, therefore what will be the flow of water, so air.

Another disadvantage is the risk of unavailability of the entire fire protection device in the event of damage to the braking circuit, for example as a result of an accident at the origin of the fire or subsequent thereto .

Likewise, it is incompatible with the desired result the commissioning of an additional compressor (see claim 11), the air flow rate at high pressure should be at least equal to the total flow of all sprinklers in use.

It is also described in the article entitled "6 new SBB TES compositions" published in the Swiss Firefighters' Journal (N ° 7/96 pp.538-543) a tanker truck for a railway convoy that includes a tank, suitable for receiving a fire-fighting fluid, which is mounted on or integrated into a chassis equipped with bogies comprising at least one pump connected to the tank to be able to suck the fluid and connected to duct portions to be able to repress this fluid .

But such a wagon does not ensure a high degree of availability and performance ability in the fight against fire on board rail convoys.

In railway matters, the use of spare trains including, with other elements, a tank-pump car armed with fire hoses and used by crews of servants in approach to a disaster convoy is known.

However, the development of piggyback transport, especially that using tunnels, over great distances, raises the question of better safety of convoys and the advisability of having new onboard fire extinguishing equipment.

Indeed, the installation in railway tunnels fixed sprinklers on the walls of the structure is operational only during the crossing of it and requires a complex procedure of sequential interventions (detection, localization, stop of the convoy) before the sprinklers are put into action. Even if, despite its cost in a long tunnel, there is continuous coverage and sufficient footprint, there is inevitably a delay important to attack the fire and therefore a significant risk of its extension.

As an example of onboard fire extinguishing equipment, reference will be made, for example, to documents EP-522 671-A: it relates to a wagon for the transport of one or more road vehicles, which comprises a duct extending in the longitudinal direction of the wagon and supplying a spraying installation.

However, such a device does not ensure that the conduit is folded fire fighting fluid: the fight against a fire could therefore start with delay.

The present invention aims to provide a simple device to build, maintain and use, which overcomes the disadvantages mentioned above and whose availability, power and efficiency are adapted to the particular risk of a fire on board of a railway convoy on the move.

The objective of the invention is to implement on a set of vehicles traveling in a convoy, mainly on railroad tracks, means for acting on a fire pit, nascent or underdeveloped, that would occur or develop on said convoy and extinguish or circumscribe it, even while the convoy is proceeding, before any other intervention outside the convoy is possible.

The objects of the present invention as well as others which will appear thereafter, are achieved by a railway car tank wagon, which comprises a tank, adapted to receive a fire-fighting fluid, which is mounted on or integrated in a chassis equipped with bogies, where at least one pump is provided, connected to the tank, to be able to suck up said fluid, and connected to duct portions to be able to discharge said fluid through said duct portions, which tank car is characterized, according to the present invention, in that it comprises two transport pipe portions of said fluid, respectively extending to each of the two longitudinal ends of the frame or wagon, connected to the tank and terminated by a connecting device, through which the pipe portions under pressure of a fluid are connected to a pipe, extending longitudinally and belonging to a nearby wagon or a nearby car.

Advantageously, this wagon comprises two pumps each driven by a heat engine, and connected to the two duct portions to allow each pump to deliver the extinguishing liquid under pressure to either of the two end ducts to feed the part of the convoy situated in front of or behind the tank car, or to both portions of the duct simultaneously to feed both the parts of the convoy arranged upstream or downstream, and in which said duct portions are in flexible parts .

Preferably, the capacity of the tank is greater than 10 m ² .

Advantageously, this wagon also comprises an air booster capable of pressurizing the tank.

The present invention also relates to a railway train which is characterized in that it comprises a tank car as above and at least one car or car coupled to the tank car, directly or indirectly, which comprises a longitu-dinal pipeline extending over the entire length of the wagon or car and terminated at each end by a connecting device to allow its connection, either to a longitudinal pipe of an adjacent wagon or car, or to one of the portions of end pipe of the tank car.

Preferably, this convoy comprises a road vehicle transport wagon equipped with said longitudinal pipe and provided with secondary pipes connected to the main pipe to deliver the extinguishing liquid to sprinklers mounted on the vehicle transport wagon.

Advantageously, the vehicle carrier wagon comprises a bodywork frame which has walls and a roof, and comprises a row of sprinklers immediately placed under the roof. This row of sprinklers can also be placed in the median longitudinal axis of the roof.

Preferably the vehicle carrier wagon comprises a section of pipe which is connected to the pipe of the wagon and which is terminated by a connection orifice to a sprinkler system integrated into the road transport vehicle and the section is extended by a flexible pipe connection to the network.

Finally, the present invention also relates to a wagon for transporting one or more road vehicles, comprising a longitudinal pipe supplying a sprinkler installation: this pipe extends over the entire length of the wagon and ends at each end by a connecting device through which the pipe is connected, where appropriate by a longitudinally extending pipe belonging to at least one adjacent car or a neighboring car, to one of the end pipe placed under the pressure of a fluid of a tank car: in addition this pipe has secondary pipes connected to the main pipe, for delivering the extinguishing liquid to sprinklers mounted on the vehicle transport car.

Advantageously, this wagon has a body frame which has walls and a roof, and comprises a row of sprinklers placed immediately under the roof. This row of sprinklers is placed in the median longitudinal axis of the roof.

Preferably in this case, this wagon comprises a section of pipe which is connected to the pipe of the wagon and which is terminated by a connection port to a sprinkler system integrated in the road transport vehicle.

• La Fig. 1 est une vue schématique longitudinale d'un wagon-citerne-pompe comportant un réservoir de liquide extincteur, des pompes de propulsion dudit liquide, des canalisations et les moyens de leur raccordement au reste du convoi.
• La Fig. 2 est un exemple de réalisation d'une canalisation flexible reliant deux wagons quelconques du reste du convoi.
• La Fig. 3 est une vue schématique longitudinale d'un wagon de transport de véhicule routier comportant un tronçon de canalisation d'acheminement du liquide extincteur et un réseau de répartition dudit liquide.
• La Fig. 4 est une vue schématique de dessus dudit wagon.
• La Fig. 5 est une vue schématique transversale dudit wagon.
• La Fig. 6 est une vue en trois parties (6a, 6b, 6c) sans détails, d'un exemple de formation d'un convoi ferroviaire comportant un dispositif selon l'invention.
• La Fig. 7 est une vue transversale arrière d'un wagon porttant un véhicule routier, lequel comporte un réseau particulier d'arroseurs pouvant être raccordé temporairement aux canalisations du convoi.
• La Fig. 8 est une vue transversale arrière d'un wagon portant un véhicule routier, lequel comporte un toit ouvrant longitudinalement dans sa partie médiane.

The characteristics of the invention will emerge on reading the following description of an onboard automatic extinguishing device, with reference to the appended drawings, in which:

• Fig. 1 is a schematic longitudinal view of a tank-pump car comprising an extinguisher liquid tank, pumps for propelling said liquid, pipes and means for their connection to the rest of the convoy.
• Fig. 2 is an embodiment of a flexible pipe connecting any two wagons of the rest of the convoy.
• Fig. 3 is a schematic longitudinal view of a road vehicle transport wagon comprising a section of pipe for conveying the extinguishing liquid and a distribution network of said liquid.
• Fig. 4 is a schematic view from above of the wagon.
• Fig. 5 is a schematic transverse view of said car.
• Fig. 6 is a view in three parts (6a, 6b, 6c) without details, an example of forming a railway train comprising a device according to the invention.
• Fig. 7 is a rear view of a wagon carrying a road vehicle, which comprises a particular network of sprinklers that can be temporarily connected to the pipes of the convoy.
• Fig. 8 is a rear transverse view of a wagon carrying a road vehicle, which comprises a sunroof longitudinally in its middle part.

• un wagon citerne-pompe 1 incorporé à un convoi C et sur lequel sont disposés :
  • un réservoir 2, lequel est rempli au moins partiellement de liquide extincteur 3 par l'orifice obturable 2b,
  • deux dispositifs compresseurs d'air 4,
  • deux moto surpresseurs 5 AV et 5 AR du liquide extincteur. Chacun de ces moto-surpresseurs est raccordé en amont (coté aspiration) au point bas 6 du réservoir 2 par une portion d'une canalisation longitudinale 7 et, en aval, (coté refoulement) à une tuyauterie en boucle by-pass 7/8 sur laquelle un clapet anti-retour 7a interdit le retour du liquide extincteur de 8 en 6 mais autorise son passage en sens inverse. Chaque portion avant et arrière de la canalisation 7 s'étend, en aval de la boucle by pass 7/8 et a travers les vannes 27a jusqu'à un dispositif d'extrémité 9 permettant son raccordement à une autre canalisation. Une conduite 7b relie les deux boucles by-pass 7/8 avant et arrière à travers la vanne 7c. Un montage selon l'exemple ci-dessus permet l'isolement ou au contraire la banalisation des équipements avant et arrière du wagon-citerne-pompe. L'énergie nécessaire au fonctionnement des moto-surpresseurs est tirée d'une source indépendante de celle utilisée pour la marche du convoi, par exemple d'un moteur thermique.

Automatic fire-fighting equipment being as possible doubled, either to cope with the possible failure of one of them, or to strengthen its action, a preferred embodiment of the device according to the invention comprises all first :

• a tank-pump car 1 incorporated in a convoy C and on which are arranged:
  • a reservoir 2, which is at least partially filled with extinguishing liquid 3 through the closable orifice 2b,
  • two air compressor devices 4,
  • two motor boosters 5 AV and 5 AR extinguisher liquid. Each of these motor-boosters is connected upstream (suction side) to the low point 6 of the tank 2 by a portion of a longitudinal pipe 7 and downstream (side discharge) 7/8 bypass piping on which a check valve 7a prohibits the return of the extinguishing liquid from 8 to 6 but allows its passage in the opposite direction. Each front and rear portion of the pipe 7 extends downstream of the bypass loop 7/8 and through the valves 27a to an end device 9 for its connection to another pipe. A pipe 7b connects the two by-pass loops 7/8 front and rear through the valve 7c. An assembly according to the example above allows isolation or on the contrary the trivialization of the front and rear equipment of the tank-wagon. The energy required for the operation of the motor-booster is drawn from a source independent of that used for the operation of the convoy, for example a heat engine.

• des wagons 10, porteurs de véhicules de transport routier et circulant en formation de convoi ferroviaire. Lesdits wagons comportent :
• une ossature de caisse 11 comportant des parois pleines ou à claire-voie et une toiture à paroi pleine.
• un tronçon 12 de canalisation -dite canalisation principale-placé longitudinalement de l'avant à l'arrière de chacun desdits wagons et comportant également à chacune de ses extrémités un dispositif 9 permettant son raccordement à une autre canalisation.
• un premier réseau de canalisations -dites secondaires-13, disposé sur ladite ossature de caisse 11, en aval d'un dispositif d'alarme et de commande 13AC, leque-L est raccordé en 14 audit tronçon 12 de canalisation longitudinale; ledit réseau 13 comporte des ramifications 15 réparties sur l'ossature et terminées par des orifices arroseurs 16, lesquels sont obturés par des dispositifs thermo-fusibles 17,
• un deuxième réseau de canalisations secondaires 13a placé en aval d'une vanne motorisée 19 raccordée en 14a audit tronçon 12. Ledit réseau 13a comporte des ramifications 15a placées verticalement de part et d'autre des issues avant et arrière desdits wagons 10 et sur lesquelles ramifications sont raccordés des orifices arroseurs 18. La vanne motorisée 19 est actionnée par un dispositif de détection d'incendie 20 et de liaison 20a
• un tronçon de canalisation 15b, raccordé en 15C à la canalisation 12 relie, temporairement comme décrit plus loin, l'installation du convoi C à un réseau particulier d'extinction automatique embarqué mais distinct du réseau intégré audit convoi.
• éventuellement, un ou plusieurs wagons de service 22 dépourvus d'ossature de caisse et de réseaux d'arroseurs mais comportant un tronçon 12 de canalisation longitudinale et des moyens 9 disposés de manière à assurer la continuité du dispositif d'extinction tout le long du convoi. Entre chaque wagon incorporé au convoi C, y compris le wagon-citerne-pompe :
  • une canalisation flexible 23 reliant l'arrière du tronçon 7 ou 12 de canalisation longitudinale de l'un quelconque desdits wagons à l'avant du wagon suivant et ainsi de suite jusqu'aux extrémités avant et arrière du convoi C où les orifices terminaux 24 sont obturés.
  • des équipements accessoires de purge d'air 25, de vidange 26.des canalisations flexibles, d'isolement 27 et 27a permettant la séparation des éléments du convoi sans avoir à procéder à des vidanges inutiles.

The device according to the invention furthermore comprises:

• wagons 10, carriers of road transport vehicles and circulating in railway train formation. Said wagons comprise:
• a body frame 11 having solid or slatted walls and a solid-walled roof.
• a section 12 of pipe-said main pipeline-placed longitudinally from the front to the rear of each of said wagons and also having at each of its ends a device 9 for its connection to another pipe.
• a first network of pipes-said secondary-13, disposed on said body frame 11, downstream of an alarm and control device 13AC, lacquer-L is connected at 14 to said section 12 of longitudinal pipe; said network 13 has branches 15 distributed on the framework and terminated by sprinkler orifices 16, which are closed by thermo-fusible devices 17,
• a second network of secondary lines 13a placed downstream of a motorized valve 19 connected at 14a to said section 12. Said network 13a has branches 15a placed vertically on either side of the front and rear exits of said wagons 10 and on which branches are connected sprinkler orifices 18. The motorized valve 19 is actuated by a fire detection device 20 and 20a connection
• a section of pipe 15b, connected at 15C to the pipe 12 connects, temporarily as described below, the installation of the convoy C to a particular on-board automatic extinction network but distinct from the integrated network to said convoy.
• optionally, one or more service wagons 22 without body frame and sprinkler networks but having a longitudinal pipe section 12 and means 9 arranged so as to ensure the continuity of the extinguishing device all along the convoy . Between each car incorporated in convoy C, including the tank-tank car:
  • a flexible pipe 23 connecting the rear of the longitudinal pipe section 7 or 12 of any one of the said wagons to the front of the next wagon and so on to the front and rear ends of the convoy C where the terminal orifices 24 are sealed.
  • accessory equipment for purging air 25, 26.double pipes, isolation 27 and 27a allowing the separation of the elements of the convoy without having to carry out unnecessary drainages.

The device according to the invention also applies to road transport vehicles closed goods (vans) F1 and F2 transported by said convoy C and having means for sprinkling the interior in the case where a fire occurs there.

In a first preferred embodiment, said F1 vans comprise a sunroof longitudinally by means of known devices (not shown) and preferably in its middle portion 28; the carrier wagon 10 comprises at least one row of sprinklers 16 placed immediately under its roof and above the opening portion 28 of the roof of said van.

In a second embodiment, the wagon 10 comprises a section 15b, connected at 15C to the pipe 12 and terminated by a connection port 30, which is placed downstream of a motorized valve 33. The interior of the van F2 comprises a network 13b carrying sprinklers 18 supplied with extinguishing liquid by a connection device 31, specific to the van F2, external thereto and temporarily connected to the orifice 30 by a flexible pipe 32.

The motorized valve 33, integrated in the device of the convoy C is actuated via a temporary connection 34, for example electric, with a fire detector 35, specific to the van F2 and known technique.

The advantage of equipping the transported vehicles with these complementary means is to considerably increase the efficiency of the device according to the invention by attacking an incipient fire in the enclosure of a closed van, even before said fire has been declared outside the van.

In a preferred embodiment of formation of a railway train protected against fire by a device according to the invention, the tank-pump car or wagons are placed substantially in the middle Y of the convoy C, as shown in FIG. 6.

OPERATION

As in the case of a previously known type of installation, it is put into working order by prior filling of the main pipes, secondary pipes, branched networks supplying sprinklers with thermo-fuse sealing, as well as the tank (tank). 2.

In a preferred procedure, it reserves in it the appropriate volume for it to be compressed, above the surface of the extinguishant liquid, of the air in such a quantity that all of the liquid is possibly expelled with a pressure residual sufficient to maintain a minimum efficiency sprinklers in case of failure of the motor-booster.

• de disposer d'un réservoir éprouvé pour être utilisé à la pression initiale de fonctionnement,
• la précaution de remplir, au moins en aval des moto-surpresseurs, toutes les canalisations avec un liquide extincteur contenant un produit anti-gel,
• ou d'équiper lesdites canalisations de réchauffeurs ou de tout autre moyen de protection contre le gel.

This provision is therefore not essential to the operation of the device but ensures, whatever the circumstances, the watering of the disaster area from the opening of sprinklers 16. It implies, by cons:

• have a proven reservoir for use at the initial operating pressure,
• the precaution of filling, at least downstream of the motor-boosters, all the pipes with an extinguishing liquid containing an antifreeze product,
• or equipping said heating pipes or any other means of protection against freezing.

In another preferred mode of operation, the valve 27a of the wagon 1, motorized, is closed in the standby position and all the pipes 12, 23, 13, 15, is alone filled with compressed air. This arrangement avoids the use of the anti-freeze product. On the other hand, it slightly delays the arrival of the extinguishing fluid on the fire.

Of course, the combination of these different arrangements is possible, for example by placing heaters on the only pipes 7, 12, 23 and filling the branches 13, and 15 of an anti-freeze mixture. Check valves 100 disposed at the connection points with the pipe 12 maintain the separation of the two fluids.

In an alternative embodiment, a pressure tank 101, with a capacity of 20 to 50 liters, similar to a bladder expansion vessel, is placed on each wagon 10, as a branch of the branched network 13, and 15 and downstream of said check valves. This tank compensates for any leakage of these valves to the pipe 12, maintains in the branched network a reserve of energy contributing to the initial propulsion of extinguishing liquid and thus masks the time, very short but necessary for the startup and implementation. motor-booster regime.

The convoy thus protected against fire by the device according to the invention then normally circulates by conveying its own automatic extinction device.

In the event of a fire (fire) the process is substantially the same as that of existing fixed installations. Independently of the pressure drop caused in the installation by the fusion of a shutter 17, the information transmitted by other detection and alarm devices are sent to the extinguishing equipment by known means, for example electrical, pneumatic or hydraulic. Thus, according to the trigger mode adopted, the heat released by the fire causes, in a few seconds and in any case at very short notice, either the fusion of the thermo-fusible shutters 17 or the activation of the detectors 20 and / or 35 whose signals cause the actuation of the motorized valves 19 and / or 33, and, in the second operating mode mentioned above, the opening of the motorized valve 27a. Both processes release the extinguishing liquid which is then sprayed onto the area or areas concerned.

In a preferred complementary process, the triggering, even localized, of the sprinklers 16 causes, concurrently with the detectors 20, the actuation of the motorized valves 19 creating, by means of the sprinklers 18 placed on the branches 15a at each front and rear exit of the damaged wagon. , a heat shield likely to prevent or at least delay the possible extension of fire to neighboring wagons.

Deflectors (not shown) of profile and orientation adapted to the configuration of the convoy protect the sprinklers from the wind effect in case of triggering the device during the course of the convoy.

The operation of the air-booster 5 AV and / or 5 AR is automatically triggered by the pressure drop following the opening of at least one sprinkler 16 or a motorized valve 19 and / or 33 and / or 27a , so as to keep the sprinklers in action under maximum pressure until the reserve 2 of extinguishing liquid is exhausted.

If the convoy carries open-roofed vans, type F1 described above, said roof is open for boarding so that a fire occurring in the van acts on the row of thermo-fusible shutters 17 placed on the roof of the wagon 10.

If the convoy transports road vehicles equipped with a particular type F2 network described above, said network is connected, for the duration of the transport, through the hole 31 of the convoy, by means of the flexible pipe 32 and fittings so-called "symmetrical" or "fast" equipping these three elements. A fire occurring in the enclosure of the van F2 acts on the detectors 35 and immediately triggers the action of the open sprinklers 18.

In both cases, the sprinklers are in operation even before the fire spreads outside the vans.

Given a load limit of at least 20 tonnes per axle and its empty weight, a tank-tank car can carry 50 to 60 tonnes of extinguishing liquid, ie substantially 60 m ³ constituting a reserve capable of 5 d supply, for comparison, two large fire hoses (20 m ³ / h X 2) for +/- 90 minutes.

In the exceptional case of extending the fire on an entire truck carrier with a plateau area of approximately 80 m ² , the said reserve ensures, with a flow rate of 25 1 / m ² / min, (+/- 120 m ³ / h) a so-called "deluge" operating autonomy lasting about 30 minutes, thus allowing sufficient time for the routing and putting into action of additional external emergency means to the disaster convoy.

• à moins de 1 % du poids total en charge d'un wagon porte-camion l'équipement anti-incendie dudit wagon.
• entre 20 et 50 kw la puissance nécessaire au fonctionnement de chaque moto-pompe.

It is, moreover, reasonable to estimate:

• less than 1% of the total weight of a truck carrier carrying the fire-fighting equipment of the said wagon.
• between 20 and 50 kw the power required for the operation of each motor pump.

Claims (13)

1. Tank wagon (1) for a railway convoy which comprises a tank (2) suitable for receiving a firefighting fluid which is mounted on or integrated into a chassis equipped with bogies, where at least one pump (5) is provided, connected to the tank, in order to be able to suck in the fluid there, and connected to pipe portions in order to be able to drive in said fluid through said pipe portions, characterised in that the tank wagon comprises two pipe portions (7) for transport of said fluid, each extending as far as each of the two longitudinal ends of the chassis or the wagon, connected to the tank and ended by a connection device (9), through the intermediary of which the pipe portions placed under pressure of a fluid are connected to a conduit, extending in longitudinal direction and belonging to a neighbouring wagon or carriage.
2. Wagon according to claim 1 which comprises two pumps each driven by a thermic motor and connected to the two pipe portions to allow each pump to supply the extinguishing fluid under pressure either to one or the other of the two end pipes in order to supply the section of the convoy situated in front of or behind the tank wagon, or to the two pipe portions simultaneously in order to simultaneously supply the sections of the convoy arranged upstream or downstream, and in which said pipe portions are in flexible sections.
3. Wagon according to one of the claims 2 or 1, in which the capacity of the tank is greater than 10 m³.
4. Wagon according to one of the claims 1 to 3 which also comprises an air booster (4) able to pressurise the tank (2).
5. Railway convoy characterised in that it comprises a tank wagon according to one of the claims 1 to 4, and at least one wagon (10, 22) or carriage coupled to the tank wagon, directly or indirectly, which comprises longitudinal pipework (12) extending over the whole length of the wagon or carriage and ending at each end with a connection device (9) in order to allow its connection either to longitudinal pipework of an adjacent wagon or carriage or to one of the end pipe portions of the tank wagon.
6. Convoy according to claim 5 which comprises a wagon (10) for transporting road vehicles (F1, F2) equipped with said longitudinal pipework and provided with secondary pipework connected to the main pipework in order to supply the extinguishing fluid to sprinklers mounted on the vehicle transport wagon.
7. Convoy according to claim 6, in which the wagon (10) carrying vehicles (F1, F2) comprises a body frame (11) which comprises walls and a roof, and comprises a row of sprinklers (16) placed immediately below the roof.
8. Convoy according to claim 7 in which the row of sprinklers (16) is placed in the median longitudinal axis of the roof.
9. Convoy according to one of the claims 6 or 7, in which:

   - the vehicle carrying wagon (10) comprises a section (15b) of pipework which is connected to the pipework (12) of the wagon and which is ended by an opening (30) for connection to a network (13b) of sprinklers (18) integrated into the road transport vehicle (F2),

   - the section (15b) is extended by flexible pipework (32) for connection to the network (13b).
10. Wagon (10) for transport of one or more road vehicles (F1, F2), comprising longitudinal pipework (12) supplying a sprinkler installation, characterised in that the pipework (12) extends over the whole length of the wagon and ends at each end with a connection device (9), through the intermediary of which the pipework (12) is connected, if appropriate through pipework extending longitudinally, belonging to at least one neighbouring wagon or carriage, to one of the end pipe portions placed under the pressure of a fluid of a tank wagon according to one of the claims 1 to 4, and in that the pipework (12) comprises secondary pipework (13) connected to the main pipework in order to supply the extinguishing fluid to sprinklers (16) mounted on the vehicle transport wagon (10).
11. Wagon (10) according to claim 10 which comprises a body frame (11) which comprises walls and a roof and comprises a row of sprinklers (16) placed immediately below the roof.
12. Wagon (10) according to claim 11, in which the row of sprinklers (16) is placed in the median longitudinal axis of the roof.
13. Wagon (10) according to claim 12 which comprises a section (15b) of pipework which is connected to the pipework (12) of the wagon and which is ended by an opening (30) for connection to a network (13b) of sprinklers (18) integrated into the road transport vehicle (F2).

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