RU2129032C1 - Plant for fire extinguishing in passenger car - Google Patents

Abstract

FIELD: auxiliary equipment for fire extinguishing in passenger cars. SUBSTANCE: the offered plant has water tank, pressure pipeline with means for fire extinguishing, inlet pipe with shutoff cock and check valve, and self-contained source providing for building up water pressure. Said source includes standby tank with outlet pipe, air and drain valves. Novelty consists in that self-contained source for building up water pressure is made in form of interconnected through inlet and outlet pipes, service and standby tanks and electric pump, which are installed successively in car in three levels and forming continuous column of water. Drain valve is located on branch of outlet pipe. EFFECT: simplified design of source for building up pressure of water, and provision of emergency water store for fire extinguishing. 2 cl, 1 dwg

Description

 The invention relates to auxiliary fire extinguishing equipment for passenger cars, complementing regular fire extinguishers.

 The well-known "Fire extinguishing installation for locomotives" (USSR, aut. St. N 183798, B 61 C 17/00, declared 01/26/1965), containing a pneumohydraulic reservoir with an aqueous solution connected to a pressure pipe led to the fire extinguishing agent through a flexible hose and a mixer, which is additionally connected through a pressure reducing valve and an uncoupling valve by a pipeline to the air line of the locomotive.

 The use of compressed air from the line for the operation of the installation will make it difficult to use it on a car.

 The well-known "Ship water fire extinguishing system" (USSR, aut. St. N 1126304, A 62 C 35/16, stated 03/18/83), including pneumatic-hydraulic capacity, pressure pipe, electromechanical cranes and fire extinguishing means connected to the main pipeline.

 The presence in this system of a means of regulating the water level, electromechanical taps, a source of compressed air and an additional pipeline to it as applied to the car will complicate the system (see also ed. St. N 1475688, A 62 C 35/12, stated 25.05.87).

 The prototype was a system of autonomous water fire extinguishing in a passenger carriage (USSR, autos.St. N 1725927, A 62 C 35/00, announced March 5, 90), containing the car’s water system (5), a tank (1) with an inlet pipe (2 ) and an outlet pipe (8), a valve (3) mounted on a water pipe, a multi-way valve (14), a pipe (10) with fire extinguishing means and an autonomous source (cylinder 16) with compressed air to ensure water pressure in the pipe (8) . The tank (1) communicates with the atmosphere through a pipe (17) through a multi-way valve (14) and a pipe (18).

 The presence of a float shutter (6), a check valve (13), a valve (7), a crane (14), pipes (15, 17 and 18), cylinder 16 complicates the system.

 In addition, the float valve will not work on the car due to fluctuations in the water level in the tank when the train is moving.

 This system requires regular monitoring of the compressed air pressure in the cylinder (16) and periodic replenishment at stops on the main air line of the train, which is associated with inconvenience, especially at night.

 The automatic maintenance of the air pressure in the cylinder (16), which is mentioned at the beginning of the description of the prototype, is not feasible, as this can lead to large differences in the pressure of compressed air in the brake line along the route and undesirable braking of the train in the tunnel, on the bridge or in a curve with poor visibility, i.e. makes this fire extinguishing installation unacceptable in this case.

 The objective of the proposal is to simplify the design of the installation and ensure its reliability by guaranteeing the necessary reserve (volume) of water for extinguishing the fire.

 The problem of developing this installation arose as a result of such fires when the car burns down, and about a ton of unused water remains in its water system.

 Up to now, installations of powerful water pressure in distribution pipelines have been traditionally developed in order to create an indoor environment by spraying using sprinkler heads to suppress the fire source (see, for example, SU Auth. St. NN 183798, 326924, 902770, 1102615, 1126304, 1475688, 1611350).

 In order to extinguish the fire that occurred in the car, it was decided not to create such a large water pressure, but to use the available levels of the water tank and the reserve water tank, adding to this pressure by some pressure increment in the pressure line, for example, up to 0.35 at. Such additional pressure in the line is quite achieved due to the energy available under the metal base of the floor of the car battery.

 To this end, the installation comprises a water tank, a pumping pipeline with fire extinguishing means, an inlet pipe with a shut-off valve and a check valve, and an autonomous source of water pressure supply, including air and drain valves. New in design is that the autonomous source is made in the form of interconnected through the inlet and outlet pipes - a water tank and a reserve tank and an electric pump, located in the car in series in three levels, forming a consumable continuous column of water, and the drain valve is located on the outlet outlet pipe.

 The technical result is expressed in the following. The intermediate location of the backup tank in the liquid column allows you to create an untouchable supply of water for fire fighting. This supply of water is provided by its natural flow from the water tank to the reserve tank, which remains filled even after the divergence of the total volume of water in the water tank. The presence of water in the water tank during the fire extinguishing period will create additional pressure in the reserve volume of water due to the difference in the location of the tanks (this is not the prototype, since there is no continuous column of liquid in the gap between the water system (5) of the car and the reserve tank (1) due to the performance of the latter by pneumohydraulic.

 Using the principle of a continuous column of liquid in tanks in the proposed installation will allow avoiding the use of a float shutter (available for automatically maintaining the water level in a reserve tank both in the prototype and in the system according to ed. St. USSR N 1126304).

 The location of the drain valve on the outlet branch pipe simplifies the valve, compared with its inclusion directly in the outlet pipe, reduces metal consumption compared to the prototype, where the outlet with a drain valve and a discharge pipe are connected in parallel to the backup tank; their parallelism could lead, in the case of such an arrangement in our installation. To defrost the discharge pipe, the fire valve of which is installed on the control panel above the drain.

 The attached drawing shows a diagram of an installation for extinguishing a fire in a passenger car.

 The fire extinguishing installation contains installed inside the car as for water 1, an injection pipe 2 with fire extinguishing means, an inlet pipe 3 with a shut-off valve 4 and a check valve 5, a drain valve 6 mounted on the outlet 7 of the outlet pipe 8 and an autonomous source of water pressure supply, made in the form of nozzles connected to each other through the inlet 3 and outlet 8 - a water tank 1 and a backup tank 9 and an electric pump 10 installed in the car in succession in three levels to create a consumable continuous liquid column awns fire extinguishing.

 The air valve 11 is directly mounted on the backup tank 9.

 An electric cable from under the car is brought out to the control panel 12 and from the control panel to the electric pump 10 and is enclosed in a steel pipe. The cable entry into the pipe and the outlet are sealed against moisture.

 The fire extinguishing means includes a fire valve 13, a sleeve 14 and a barrel 15. It is placed in a recess of a longitudinal partition. The niche with the control panel 12 is closed on the corridor side with a removable cover 16.

 Installation works as follows.

 Water is transferred from the water tank 1 to the reserve tank 9 with the air valve 11 and shut-off valve 4 open (fire valve 13 and the drain valve 6 are closed). The completeness of filling the backup tank 9 is controlled by the appearance of water from the air valve 11, which immediately closes.

 The water tank installed on the carriage stream, in operation, as a rule, always contains water and the shut-off valve 4 is open, however, water from collisions of the reserve tank 9 is prevented from entering the water tank due to the check valve 5.

 If the fire center in the carriage’s room with a regular fire extinguisher could not be extinguished, sleeve 14 is removed from the niche and unwound towards the fire site, the fire valve 13 is opened, the electric pump 10 is turned on using the “automatic” button (on the control panel 12) and the fire is extinguished. At the same time, the water pressure created by the liquid column 1, 9, 10 is additionally amplified by an electric pump and is supplied to the pipeline 2 with fire extinguishing means.

 Tests have shown that an additional increase in water pressure of only 0.35 atm ensures reliable quenching of the sunburn in the car.

 If necessary, drain from the backup tank 9, close the valve 4, open the air valve 11 and the drain valve 6.

 The empty reserve tank after opening its side hatch is cleaned of sediment and washed.

Claims (2)

 1. Installation for extinguishing a fire in a passenger car, containing a water tank, an injection pipe with fire extinguishing means, an inlet pipe with a shut-off valve and a non-return valve, and an autonomous source of water pressure supply, including an air and drain valve, characterized in that the autonomous source is made in the form of interconnected through the inlet and outlet pipes of the water tank and the backup tank and electric pump, located in the car in series in three levels, forming a consumable continuous column of water.  2. Installation according to claim 1, characterized in that a drain valve is located at the outlet of the outlet pipe.