RU2721193C1 - Fire truck and foam generator - Google Patents

Abstract

FIELD: fire safety equipment.

SUBSTANCE: invention relates to fire-fighting equipment, namely, to fire-fighting ground vehicles for fire extinguishing of solid combustible materials (SCM) by means of foam fire extinguishing. Fire truck 1 comprises basic chassis, in body 2 of which there is a system for generating quick-setting compression foam, which, together with foam supply device to fire center, consists of modular units 3, 4, 5. Each modular unit 3–5 consists of cylinder 7 of foaming agent solution, of device for air supply in the form of cylinder 8 with compressed air, of cylinder 9 with compressed gas, of paired sleeves 10 of high pressure of sleeve line, of foam supply device to fire center made in the form of foam generator 11. Foam generator 11 comprises housing 24 with compression foam components supply via two sleeves 25, 26 with shutoff devices 21, 22, distribution nozzle 27 at housing inlet 24, cylindrical mixing chamber 28 under pressure of compression foam components, a set of foaming grids 29 and confuser 30 with convergent outlet channel changing into cylindrical barrel 31 of compression foam flow 32.

EFFECT: simplified system of compression foam supply from fire engine to fire center by means of creation of such scheme of supply of compression foam components and special design of foam generator, which make it possible to generate compression foam near fire center, including for use in extinguishing fires when supplying fire extinguishing agent (EA) to the twentieth and even to the thirtieth floor; possibility of using four fire-fighting modes.

13 cl, 4 dwg

Description

The invention relates to fire fighting equipment, namely, to land-based fire fighting vehicles for extinguishing fires of solid combustible materials (TGM) by foam fire extinguishing.

Hundreds of thousands of fires occur annually, the damage from which exceeds hundreds of billions of dollars. More than 90% of the total number of fires are TGM fires. More than 90% of TGM fires in the world are extinguished with water, and most often they are not extinguished effectively.

With any method of extinguishing TGM fires with water, more than 90% of the water supplied to extinguish is lost in vain, because water flows off the surface of the TGM faster than its fire extinguishing (cooling) properties have time to be realized. Moreover, excessively spilled water during extinguishing fires of TGM, especially in internal fires in buildings, and even more so in multi-story buildings, causes additional damage, often exceeding the damage from the fire itself. That is why fires of TGM with water all over the world are not extinguished efficiently.

Recently, as a fire extinguishing agent, quick-hardening foam (BTP) with special properties has been used, the fire-extinguishing efficiency of which, when tested according to GOST, is 50 times higher than the efficiency of water.

The peculiarity of its rheological properties is that for several seconds after contact with the surface of all types of TGM, it remains fluid with enhanced adhesive properties. This allows her to cover with a relatively uniform layer all, including hard-to-reach surfaces of the TGM; over the next 2–3 seconds, the foam gradually thickens and, thanks to high adhesion, is held by a layer 1–1.5 cm thick even on vertical and ceiling surfaces, and in the next few seconds the foam hardens, covering all protected surfaces of the TGM with a heat-protective, fire-resistant layer of non-combustible foam.

At the same time, in the process of extinguishing, the foam has a high cooling ability, acquiring both heat-shielding and insulating properties, which is especially important when extinguishing TGM fires. And carbon dioxide released during the process of insignificant destruction of the foam additionally enhances the fire extinguishing effect.

By its nature, quick-hardening foam is a two-component gas-liquid system that transforms into a solid state, and the fact that foam is generated in the foam stem under the pressure of the gas hardening it makes it a compression foam.

Known mobile fire extinguishing installation with foam generation by a compression method, comprising a mixing chamber, to the output of which a foam supply device is connected to the fire source, and a water supply system, including a water supply pump and a water supply pump drive, a foaming concentrate supply system, connected by pipelines to the inlet of the mixing chamber including a foam pump and a foam pump drive, as well as an air supply system including an air compressor and an air compressor drive, a water supply pipe connecting a water supply pump and a mixing chamber, is equipped with a water flow meter, an electric throttle valve and a check valve, as well as an electronic the throttle control unit, while the input of the throttle control unit is electrically connected to the output of the water flow meter, and the output of the throttle control unit is electrically connected to the input of the throttle actuator. - RU 2663398 C1, 2018

A disadvantage of the known mobile unit is its complexity: to supply the required amount of foaming concentrate with the necessary pressure, you need a foam pump to supply foaming concentrate from the reservoir through a non-return valve into the mixing chamber, and also an electronic control unit for the foaming concentrate supply system, which controls the operation of the adjustable hydraulic pump hydraulic drive transmission, driving an unregulated hydraulic motor, which is the foam pump drive.

The density of the compression foam supplied through the hoses or pipelines in stationary fire extinguishing systems depends on the pressure in the hoses or pipelines, on pressure losses due to the hydraulic resistance of the foam supply system from the place of its generation to the fire extinguishing object, and also on piezometric pressure at the foam to a height. And the fire extinguishing efficiency to a large extent depends on the density of the extinguishing foam.

The complexity of controlling the supply of fire extinguishing foam and its loss of density during transportation along hoses or pipelines is the reason for the ineffective use of the installation during fire fighting in buildings with high floors.

In connection with these shortcomings, the technical problem solved by the invention is to simplify the system for supplying components of a fire extinguishing agent (compression foam) from a fire engine to a fire by creating such a circuit for supplying components of compression foam and a special foam generator design that allow the generation of compression foam close to the fire, including for use in extinguishing fires when applying a fire extinguishing agent (OS) to the twentieth and even to the thirtieth floor; the possibility of using four fire extinguishing modes: foam quenching, gas quenching, quenching with an aqueous solution of a foaming agent (quenching with an aqueous solution with a wetting agent), combined gas-foam quenching.

The technical problem is solved by a fire truck containing a base chassis, an air supply device and a foaming agent cylinder connected with a foam supply device to a fire source for generating quick-hardening compression foam, while a quick-hardening compression foam generation system, together with a foam supply device to a fire center, presented in the form of modular blocks made with the possibility of installing them on a car body and containing each block — an air supply device in the form of a cylinder with compressed air through a supply channel connected to a cylinder of a foaming agent solution containing a ball wad of elastic material floating on the surface of the solution, an additional cylinder with compressed gas, the discharge channel of which, as well as the channel of the cylinder of the blowing agent solution, are connected each, through one of the corresponding twin hoses of the high pressure of the hose line, to the foam supply device to the fire, made in the form of a foam generator.

Private versions of the preferred embodiment of the fire truck are offered, which are as follows:

- at the inlet of the supply channel of the cylinder with compressed air and the inlet of the outlet channel of the cylinder with compressed gas, the corresponding locking device and gearbox are installed;

- each of the outputs of the channels for the release of the cylinder of the foaming agent solution and the release of the cylinder with compressed gas is connected to the corresponding input of one of the paired high-pressure hoses of the hose line through the corresponding locking device;

- each of the outputs of the paired high-pressure hoses of the hose line is connected to the foam generator through a corresponding locking device;

- the stock range of cars of various load capacities was used as the base chassis, the body of which is equipped with the corresponding number of modular units;

- the number of modular units, depending on the required power, is increased to twenty;

- the diameter of the ball wad of elastic material on the surface of the foaming agent is related to the diameter of the high pressure sleeve connected to the cylinder of the foaming agent;

- foam is supplied from the foam generator to the boundary of the fire spread, to the surface of the combustible material, in front of the flame front;

- locking devices of the outputs of the paired high-pressure hoses of the hose line connected to the foam generator, in joint or alternate work, organize three fire extinguishing modes: foam extinguishing, gas extinguishing, extinguishing with an aqueous solution of a foaming agent;

- during the joint operation of the locking devices of the outputs of the paired high pressure hoses of the hose line connected to the foam generator of one modular unit, and the simultaneous operation of one locking device of the output of the hose line connected to the channel for releasing the compressed gas cylinder of the other modular unit connected to the corresponding foam generator, a combined fire extinguishing mode.

The fire engine is illustrated by drawings, where in FIG. 1 (a, b) shows the placement of modular fire extinguishing blocks in the car body, in FIG. 2 (a, b) - a set of equipment for a modular block, in FIG. 3 (a, b, c) shows the scheme of work (displacement of the foaming agent from the cylinder) ball wad.

As the base chassis for the proposed fire truck, you can use the range of cars of different carrying capacities, the body of which is installed the appropriate number of modular units.

The fire extinguishing system can be equipped with separate universal blocks, with a capacity of 200 liters of solution, weighing 420 kg. Collecting them on a car platform in any quantity, from one to twenty, at the discretion of the car designer. And even in an operational manner, when placing the machine in combat crew.

Fire truck 1 of FIG. 1 (a, b) contains a base chassis, in the body 2 of which there is a quick-hardening compression foam generation system, which, together with a foam supply device to the fire site, consists of modular units: in FIG. 1, b shows the placement of three modular blocks 3, 4, 5. The body 2 of car 1 also contains a set of 6 auxiliary equipment.

Each modular block 3-5 shown in FIG. 2 (a, b), consists of the following basic equipment: a cylinder 7 of a foaming agent solution, an air supply device in the form of a cylinder 8 with compressed air, a cylinder 9 with compressed gas, paired high pressure hoses 10 of a hose line, a foam supply device to a fire, made in the form of a foam generator 11.

At the inlet of the supply channel 12 of the cylinder 8 with compressed air, a locking device 13 and a gearbox 14 are installed.

At the inlet of the exhaust channel 15 of the cylinder 9 with compressed gas, a locking device 16 and a gear 17 are installed.

The output of the outlet channel 18 of the cylinder 7 of the foaming solution is connected to the inlet of one of the paired high-pressure hoses 10 of the hose line through the exit of the outlet channel of the 18th balloon 7 Exit of the outlet channel 18 of the cylinder 7 locking device 19.

The output of the outlet channel 15 of the cylinder 9 with compressed gas is connected to the inlet of one of the twin hoses 10 through the locking device 20.

Each of the outputs of the paired sleeves 10 is connected to the foam generator 11 through a corresponding locking device 21, 22.

Car 1 may be equipped with a remote control unit (not shown), configured to supply a control signal to all locking devices.

The cylinder 7 of the foaming solution contains a ball wad 23 of elastic material floating on the surface of the solution; the diameter of the ball wad 23 is related to the diameter of the outlet channel 18 of the foaming agent solution.

Fire extinguishing using a fire truck 1 with modular fire extinguishing blocks 3-5 is as follows.

Upon arrival at the site of the fire, the head of the fire extinguishing (RTP) places 3 fighters - gunners along the front of the fire; all three fighters, having unwound the hose lines, with trunks (foam generators) in their hands, are in a combat position; RTP gives the command to extinguish the fire: it determines how many fighters to submit OS (foam) to extinguish the fire.

All operations to control the OS supply system can be performed manually by the operator, from the body 2 of the fire truck 1 or remotely, from the driver's cab. Then all the locking devices 13, 16, 19, 20, 21, 22 are equipped with a remote control unit, at the request of the customer.

The driver of the fire engine, who is also the operator of the OS supply system - foam, opens the locking device 13 at the inlet of the supply channel 12 of the cylinder 8 with compressed air and the locking device 16 at the entrance of the exhaust channel 15 of the cylinder 9 with compressed gas. Using gearboxes 14 and 17, it sets the working pressure: 7-15 atm for compressed air and 6-8 atm for compressed gas corresponding to the object and the combat situation.

In the foam generator 11 of a special design to create compression foam, the components of the mixture are fed separately along the paired high pressure hoses 10. At the same time, the locking device 19 of the outlet channel 18 of the cylinder 7 of the foaming agent is opened, and the locking device 16 of the outlet channel 15 of the cylinder 9 with compressed gas 10 through the gearbox 17 and the open locking devices 21, 22.

Compressed gas (for example, carbon dioxide) is supplied under the pressure of its own vapor of elasticity in the cylinder 9, and the foaming agent solution is displaced under the pressure of compressed air from the cylinder 8.

According to the RTP command about the beginning of the fire extinguishing, when the necessary pressure in the arms 10 is reached, recorded by pressure gauges (not shown), the trunks begin the process of extinguishing the fire, controlling the supply of foam to the burning center. In this case, the foam is supplied from the foam generator 11 to the boundary of the fire spread, to the surface of the combustible material, in front of the flame front. In this case, the extinguishing efficiency will be high, because allows you to reduce the loss of foam from its destruction.

The proposed design of the pair of sleeves 10 allows you to use them as a single sleeve, which is especially important in tactical use in a combat situation. This allows us to solve the problem of using hose lines of almost any desired length (up to 140 meters or more).

In a balloon 7 with a foaming agent solution, a light ball freely floats on its surface - a ball wad 23 made of an elastic material, for example, a rubber ball, with a diameter correlating (slightly smaller) with the diameter of the outlet channel 18 of the foaming agent solution (Fig. 3a). During the entire process of displacing the foaming agent solution from the cylinder 7 by the pressure of compressed air through the supply channel 12 from the cylinder 8 with compressed air, the ball wad 23 floats freely along the surface of the solution, descending with it to the conical bottom of the balloon 7. At the end of the process of leakage of the blowing agent ball wad 23 along the conical bottom of the cylinder 7 falls into the lower neck of its bottom (Fig. 3b). The last portions of the solution, which continues to flow out of the cylinder 7, get into the outlet channel 18 by the pressure of compressed air. Ball wad 23, advancing along the outlet channel 18, displaces the foaming agent solution from it, preventing it from mixing with the air expelling it (Fig. 3c). Thus, the ball wad simultaneously solves two problems: it ensures complete displacement of the foaming agent solution from the hose (and this is more than 35% of the total stock of the solution), and eliminates turbulent mixing of compressed air with the foaming solution in the fire hose, i.e. prevents the formation of air-mechanical foam (VMP) in it, which is especially dangerous when extinguishing a fire in multi-storey buildings, where the length of vertically located fire hoses is large.

Depending on the joint or alternate operation of the locking devices 21, 22 of the twin hoses 10 of different modular blocks 3, 4 or 5 connected to the corresponding foam generators 11, four fire extinguishing modes can be organized: foam extinguishing, gas extinguishing, extinguishing with an aqueous solution of a foaming agent, etc. e. quenching with an aqueous solution with a wetting agent and combined quenching.

During foaming extinguishing, both shut-off devices 21, 22 are open, through which compressed gas is supplied to the foam generator barrel 11 from the cylinder 9 and the foaming agent from the cylinder 7. This mode is for all types of TGM fires.

In the process of foam extinction, it is important that the foam is not delivered to the fire site, not to the flame zone, but to the boundary of its distribution, to the surface of the combustible material, in front of the flame front, which further reduces the loss of foam from its destruction.

When extinguishing gas, the shut-off device 16 is open, through which compressed gas is supplied to the barrel-foam generator 11 from the cylinder 9; while the locking device 21 from the cylinder 7 with the foaming solution is closed. This mode is used in facilities where foam is unacceptable, for example, fires of transformers, cables, motors or generators under high voltage;

When quenching with an aqueous solution with a wetting agent, a shut-off device 21 is opened, through which an aqueous solution of a foaming agent is supplied from the cylinder 7 to the foam generator barrel 11; while the locking device 22 from the cylinder 8 with compressed gas is closed.

This mode is used to extinguish forest fires that have gone underground, in the thickness of caked forest litter (its thickness is 30-50 cm or more, and it is difficult to get so deep with ordinary water); extinguish endogenous (underground) forest fires that occur in hot weather by the mechanism of spontaneous combustion, underground decay; peat (underground) fires, sometimes lasting for months and not amenable to extinguishing with water; fires in city refrigerators and in the warehouses of Rosrezerv, where the thermal insulation of walls and ceilings is made of peat stoves, which are almost impossible to put out with ordinary water, and some other fires of TGM.

With combined extinguishing, both shut-off devices 21, 22 of the modular block 3 are opened for supplying an foaming agent aqueous solution from cylinder 7 and compressed gas from cylinder 9 to its foam generator 11; at the same time, the locking device 22 of the modular unit 4 is open, through which compressed gas is supplied to its foam generator 11 from the cylinder 9; while the locking device 21 of the modular unit 4 from the cylinder 7 with the foaming solution is closed. This mode is used on particularly complex objects, where necessary.

At the end of the quenching in any of the modes, the shanks overlap the shut-off devices 21, 22 on the twin hoses 10 of the modular blocks 3, 4, and the operator closes the shut-off device 19 for supplying a foaming solution and the shut-off device 16 for supplying compressed gas to the twin hoses 10.

The proposed foam generator for use in a fire truck with modular units is an original design, which completes the process of production of gas-filled foam supplied to the fire.

A device for producing a self-foaming gas-filled foam is known, including a sealed container, a gas-generating device with a solid fuel charge, a system of pipelines and supply pipes, a gas-generating device is equipped with a charge of an aerosol-forming composition, is installed in the upper part of the tank and is equipped with a gas pipe with an external heat-protective coating, in the lower part a gas conduit is equipped with a conical dissector of aerosol products of charge combustion with radial openings that allow them to flow into the lower part of the container and bubble the solution of the foaming agent with the solution saturated with a fire extinguishing aerosol, and the generator of the gas generating device is made in the form of a set of aerosol generators consisting of two or more generators having combustion chambers with gas pipes and switched on simultaneously, sequentially or in groups in accordance with the required intensity of the foaming agent solution supply to the combustion zone - RU 2622815 С 1, 2017

A similar device for producing self-foaming gas-filled foam is contained in patent RU 2678257 C1, 2019.

However, these devices cannot be used in the proposed fire truck with modular units, since their design allows you to work for a relatively short (limited) time - no more than 30-50 seconds, which is much less than the required operating time for foam generating systems: foam supply time, fire extinguishing time - 3-4 minutes or more. The lack of analogues also lies in the impossibility of stopping the process of generating and supplying foam according to the conditions of combat work and the requirements of the technology of the fire extinguishing process, its subsequent multiple continuation, in the course of extinguishing the fire. That is, the inability to control the process and the mode of supply of extinguishing agents to extinguish real fires, as required by the technology of extinguishing them (especially TGM fires).

For the closest analogue of the invention, it is possible to take a pressure head foam generator containing a housing with diffuser and confuser parts on the main pipeline, a prechamber having a bottom with sprays for forming an air flow and an nozzle in the housing for supplying a foaming solution to the mesh packet, material sleeves for feeding a foam generator of compressed gas, water and a foaming agent, while the diffuser part of the body, connected to the foam, is equipped with a diffuser adapter with a conditional passage of the foam from 150 mm to a conditional passage of 100 mm, and each of the sleeves of the material pipelines have adjustable flow valves for supplying components with pressure gauges for gas and liquid phases and the working pressure of the foam on the pressure unit - RU 82769 U1, 2009

This device cannot be used in the proposed fire engine with modular units, since it is relatively complex and weighty.

In addition, its design is made for the production of foam with a multiplicity of at least Kp = 100, while for the purpose of the proposed fire engine, foam with a multiplicity of Kp = 10-30 is required.

In this regard, the technical problem solved by the invention is to create a relatively simple hand-held device for use by the gunmen in extinguishing fires of TGM, including in buildings with high floors.

This problem is solved in a foam generator that contains a housing with inlets of compression foam components through two lines with locking devices, a distribution nozzle at the inlet of the housing, a compression chamber for mixing compression foam components made of cylindrical, a set of foam-forming nets and a confuser at their exit, which tapers the output channel of the confuser goes into a cylindrical barrel forming a foam jet.

Private versions of the device may have the following symptoms:

- two hoses with inlets of components of the compression foam are paired into a single hose line until they are connected to the corresponding locking devices;

- addition by a handle fixed to the body.

In FIG. 4 shows a diagram of a foam generator.

The foam generator 11 comprises a housing 24 with inlets of components of the compression foam through two arms 25, 26 with shut-off devices 21, 22, a distribution nozzle 27 at the inlet of the housing 24, a cylindrical mixing chamber 28 under pressure of the components of the compression foam, a set of foaming nets 29 and a confuser 30 with a taper the output channel passing into the cylindrical barrel 31 of the formation of the stream 32 of compression foam. A handle 33 is fixed to the housing 24.

Two sleeves 25, 26 of the foam generator 11 when used in modular blocks 3, 4, 5 of a fire truck 1 and designed to supply components of the compression foam are paired in a single hose line before they are connected to the corresponding locking devices 21, 22.

The foam generator is as follows.

When the locking devices 21, 22 are opened on two arms 25, 26, the foaming agent solution under pressure and compressed gas are supplied to the distribution nozzle 27 at the inlet of the foam generator body 24.

In the cylindrical mixing chamber 28, both components are mixed, and in the form of a sprayed solution are supplied to the set of foaming nets 29. Gas blows off the solution films from the nets 29 and, forming bubbles, creates a stream of compression foam 32, accelerated in the confuser 30 and formed in the cylindrical mixing chamber 28 .

Compressed gas provides the generation of compression foam, the multiplicity of which is determined only by the gas flow rate and the design of the foam generator, as well as the range of supply of the foam jet.

The proposed relatively simple design of the foam generator of small dimensions and great practical reliability, together with the sleeves paired into a single hose line, allows us to solve the problem of using hose lines of almost any desired length (up to 140 meters or more). And most importantly - it allows to ensure the stability and repeatability of the parameters of the generated compression foam.

The application of the proposed fire extinguishing system, presented in the form of a fire truck with modular fire extinguishing units and a foam generator device, allows to obtain a number of advantages, which are as follows:

- the possibility of supplying OS to the 20th and even to the 30th floor (which is 2-3 times higher than when supplying water from ordinary fire trucks) due to the peculiarities of the supply circuit of the components of the compression foam and the design of the foam generator, which allow the generation of compression foam without pressure loss in the supply hoses or pipelines, i.e. generate it directly near the fire;

- when the fire truck is located 100-140 meters from the source of ignition, it is not necessary to drive the foam through the pipes, as it is formed directly in the foam generator, which is in the hands of a firefighter in the place of extinguishing the fire;

- high rate of fire extinguishing (three times higher than when extinguishing with water), which is especially important when extinguishing while rescuing the victims of the fire;

- almost complete absence of problems of the bay of adjacent rooms and lower floors in the process of extinguishing a fire;

- significantly lower required reserves and costs of the extinguishing agent (5-10 times less than when extinguishing with water);

- shorter extinguishing times with lesser required forces and means to extinguish a fire;

- the possibility of using three fire extinguishing modes: foam extinguishing, gas extinguishing, combined gas-foam extinguishing, which allows the invention to be used in fires at various sites;

- the economic effect of the invention is associated with a significant reduction in the cost of the entire extinguishing system, which can include the absence of a pump. The price of the proposed car is 2-3 times lower than the price of the main fire truck of the Russian Emergencies Ministry.

Claims (13)

1. A fire truck containing a base chassis, an air supply device and a foaming agent cylinder connected with a foam supply device to a fire source for generating quick-hardening compression foam, characterized in that a quick-hardening compression foam generation system, together with a foam supply device to a fire source, presented in the form of modular blocks made with the possibility of installing them on a car body and containing each block — an air supply device in the form of a cylinder with compressed air through a supply channel connected to a cylinder of a foaming agent solution containing a ball wad of elastic material floating on the surface of the solution, an additional cylinder with compressed gas, the outlet channel of which, as well as the channel of the outlet of the cylinder of the foaming agent solution, is connected each, through one of the corresponding twin hoses of the high pressure of the hose line, to the foam supply device to the fire, made in the form of a foam generator, characterized in p. 11. 2. Fire truck under item 1, characterized in that at the inlet of the supply channel of the cylinder with compressed air and the inlet of the outlet channel of the compressed gas cylinder, the corresponding locking device and gearbox are installed. 3. Fire truck according to claim 1, characterized in that each of the exits of the channels for the release of the cylinder of the foaming agent solution and the release of the cylinder with compressed gas is connected to the corresponding input of one of the twin high-pressure hoses of the hose line through an appropriate locking device. 4. Fire truck under item 1, characterized in that each of the outputs of the paired high-pressure hoses of the hose line is connected to the foam generator through an appropriate locking device. 5. Fire truck under item 1, characterized in that as the base chassis used a range of vehicles of different load capacities, in the body of which is installed the corresponding number of modular units. 6. Fire truck under item 1, characterized in that the number of modular units, depending on the required power, is increased to twenty. 7. Fire truck according to claim 1, characterized in that the diameter of the ball wad of elastic material on the surface of the foaming agent is related to the diameter of the high pressure hose connected to the cylinder of the foaming agent. 8. Fire truck under item 1, characterized in that the foam is supplied from the foam generator to the boundary of the spread of fire, to the surface of the combustible material, in front of the flame front. 9. Fire truck 1, 4, characterized in that the locking devices of the exits of the paired high-pressure hoses of the hose line connected to the foam generator, in joint or alternate work, organize three fire extinguishing modes: foam extinguishing, gas extinguishing, extinguishing with an aqueous solution of a foaming agent. 10. Fire truck according to paragraphs. 1, 4, characterized in that during the joint operation of the locking devices of the outputs of the paired high pressure hoses of the hose line connected to the foam generator of one modular unit, and the simultaneous operation of one locking device of the output of the hose line associated with the channel for the release of the compressed gas cylinder of another modular block, combined with the corresponding foam generator, a combined fire extinguishing mode is organized. 11. A foam generator designed for use in a fire truck, comprising a housing with inlet components of compression foam through two sleeves with locking devices, a distribution nozzle at the inlet of the housing, a mixing chamber under pressure of the components of the compression foam, a set of foaming nets and a confuser at their outlet, characterized in that the mixing chamber under pressure of the components of the compression foam is made cylindrical, and the tapering output channel of the confuser goes into a cylindrical barrel forming a foam jet. 12. The foam generator according to claim 11, characterized in that two hoses with inlets of components of the compression foam are paired in a single hose line before they are connected to the corresponding locking devices. 13. The foam generator according to claim 11, characterized in that it is supplemented by a handle fixed to the housing.

Images