Generator of fire-extinguishing aerosol

FIELD: fire safety.

SUBSTANCE: generator of fire-extinguishing aerosol contains pyrotechnical stick with ignition assembly, installed on bottom of one of two dish-shaped casing tanks coated from inside with the functional layer out of solidified material, that are opposite connected by flangings, creating output slot nozzle, at that the functional layer of the top tank is enclosed by the perforated shell, and above the open end of the stick a receiver is formed, it via the reverse ring channel is connected with output slot nozzle. According to the invention the reverse ring channel between the perforated shell and open part of the pyrotechnical stick is connected with the output slot nozzle and is limited by the end of the functional layer adjacent to the bottom tank flanging, that closes gap between the bottom tank and stick. The suggested technical solution determined automatic two-stage action of the generator during serial modes: initially intensive burning of the pyrotechnical stick over the developed open surface, with high delivery of the extinguishing liquid, and then slow make-up of the additional aerosol until achievement of the extinguishing concentration.

EFFECT: as result of the stage supply of the generated aerosol intensity of filling of the protected object reduced, resulting in abrupt decreasing of its losses via slits, clearances, plays in the room, and ensured long-term inhibition of the fire extinguishing.

1 dwg

 

The invention relates to fire technique, and more particularly to devices of the automatic extinguishing of fires generated by combustion of pyrotechnic composition checkers aerosol flame retardants, orderly routed to the protected volume, which are intended for use on vehicles in the warehouse and industrial premises.

The level of art characterizes the aerosol fire extinguishing generator, described in patent RU 2237503, A62C 13/00, 2003, which includes a housing composed of two counter-bonded containers disc shape with a gap between their flanging, forming the output slit nozzle, generating extinguishing gas-aerosol mixture pyrotechnic charges attached in both hull tanks flush with the ends of the heat-shielding interlayer, filling flanging containers of the hull, with foam padding, covered by the end face of the sealing composition, and associated with the originating device and the igniter.

A feature of this generator is that the igniter is made in the form of a resistor placed inside the adhesive of the igniter, which is installed coaxially in the gap between the pyrotechnic charges, forming a checker generating an aerosol, which increases the reliability of initi�of ignition.

Simultaneous ignition of both charges checkers provides them face burning, intensifying the formation of extinguishing mixture.

However, the generator is inherent drawback, which is expressed in a concomitant increase in pressure inside the generator that requires structural strengthening of load-bearing elements.

In a joint combustion of charges in checkers total arise of gas-dynamic instability due to the interaction of gas flows, pressure drops in the combustion fronts, causing pressure pulsations and different burning rate, decreasing the height of the pyrotechnic charges checkers.

As a result of the functional reliability of protection of the calculated volume of the room is reduced, it is therefore necessary to use additional parallel generator, which increases capital costs.

More perfect is the aerosol fire extinguishing generator according to the patent RU 74813 U1, A62C 13/00, A62C 3/00, 2008 (claim 1 of the formula), which is the technical essence and the number of matching characteristics is selected as the closest analogue of the proposed generator.

Known aerosol fire extinguishing generator includes a pyrotechnic grenade, mounted in a housing formed of two Cup-shaped containers, a counter coupled flare, formooborota outlet nozzle slit between filling their PR�puffs from construction plaster and axisymmetric igniter.

Flanging containers fenced enclosure perforated shells forming an annular reverse channel in collaboration with the Central gas-permeable casing, bearing a single pyrotechnic grenade, mounted on the bottom of one of the tank corps.

Opposite the open end checkers, where is mounted the igniter, forms together with the bottom of the second container body receiver communicating with deaf reverse channel.

Perforated casing with pyrotechnic piece is rigidly connected by means of a carrier layer of building plaster.

This compact easy to assemble the generator is more efficient fire fighting.

Stationary regime stratified combustion end of a single pyrotechnic checkers provides a stable settlement gotprint products extinguishing mixture, lowering the temperature inside the generator which is provided by equipping it with new structural elements, form, execution and new relationships.

Perforated sidewall adjacent to the flanging of the housing, and a Central perforated casing that are associated with functional layers of plaster, perform additional functions in the device for cooling the heat exchanger in the form of a reversible annular channel.

Organized convective �plooman washing with reversals aerosol stream before discharge into the protected volume provides effective selection of thermal energy.

This structural water building plaster rapidly evaporated and through the perforations forming the reverse channel surfaces transverse colliding jets is actively mixed with the hot products of combustion checkers, diluting and cooling them.

In the reverse channel, the inhibition of gas-aerosol flow ratio of it to evaporate from the gypsum with water, the pressure and lowering the temperature of the fire extinguishing mixture by kinetic and convective mixing before emission of the radial jet flow into the protected volume.

The constructive relationship of the gas-permeable casing carrying a pyrotechnic grenade, tanks tank creates a labyrinth flow inside the generator, ensuring the rational use of structural elements in new capacity for active cooling extinguishing mixture inside the generator.

Performing a reversible annular channel stub sent to the additional flow reversal generated extinguishing mixture, counter flowing to the output delavau the nozzle.

The combustion of the pyrotechnic charge single checkers with one end provides stable during the time functioning gotprint extinguishing mixture, which may be output via the auxiliary cooling device, the receiver and reverse kolavennu relatively large volume.

However, a continuation of the marked advantages are inherent disadvantages.

Stationary mode end layer-by-layer combustion of the pyrotechnic checkers provides intensive feeding in the protected volume of the generated aerosol for fast creation of extinguishing concentration of flame retardants, but through the cracks, looseness of connectors and other backlash injected gas-aerosol mixture, respectively surges outwards, resulting in possible occurrence of secondary fires from smoldering materials.

Because of gravitational settling of extinguishing mixture is formed a concentration gradient flame retardants that may cause fires.

In addition, in a dead-end reverse channel formed stagnant zones of the aerosol, in which there is agglomeration of the dispersed phase deposited on perforated surfaces, thereby reducing the efficiency of fire.

The technical problem to be solved by the present invention is to increase the functional reliability of the generator and the efficiency of operation by appointment.

The required technical result is achieved in that in the known aerosol fire extinguishing generator containing a pyrotechnic grenade, mounted on the bottom of one of the two hull vessels disc-shaped, covered IsNot�and functional layer of curable material, which counter are connected by flanging, forming the output slit nozzle, wherein the functional layer of the upper capacity fenced perforated sidewall and an open end formed checkers receiver communicating via a reversible annular channel with the output gap nozzle according to the invention, a reversible annular channel between the perforated sidewall and the open part of the pyrotechnic checkers is associated with the output gap nozzle while limiting adjacent to the flanging of the bottom tank end face of the functional layer, which covers the gap between the bottom tank and checker.

The distinctive features of the proposed technical solution defined automatic two-stage action of the generator in a sequential modes: first, when burning pyrotechnic checkers developed on the exposed surface, with high output extinguishing mixture to dynamically populate the protected volume, and then, when you reach the combustion front level continuous layer of gypsum in the bottom of the container when the checkers burning occurs end-layered, slow feeding an additional amount of aerosol to achieve the extinguishing concentration.

As a result of stepwise feed of the generated aerosol dropped the intensity of the fill of the protected volume, leading to drastically reduced�th losses through the cracks clearances, backlash in the room and provided a prolonged inhibition of extinguishing action.

Less intense flow of generated aerosol in the second mode of combustion of the pyrotechnic checkers provides backwater extinguishing mixture in the protected space in a suspended state that more effectively inhibits combustion.

At the same time achieve the extinguishing concentrations of flame retardants in the volume of the space, compared with the prototype reduced by 40%, from 50 C to 35 C.

Filling the gap between the pyrotechnic checkers and Donna capacity to the level of her flanging allowed to exclude stubs ring reverse channel and its stagnant zones, where agglomeration and loss of the aerosol.

Mount pyrotechnic checkers directly in plaster, without perforated Central casing and sides of the fence, significantly simplifies the manufacturing technology of the generator, thereby reducing its value.

Therefore, every essential feature needed, and their combination in a stable relationship is sufficient to achieve novelty quality, extrinsic signs of dissociation, that is supplied in the utility model technical problem is solved not by the amount of effects and new shoreface the amount of features.

The essence of the proposed invention is illustrated by line�Ohm, which has a purely illustrative purpose and do not limit the scope of the claims the essential features of the formula. The drawing shows the upgraded aerosol fire extinguishing generator.

Carrying the generator housing is made of two identical tanks 1 and 2 of plate shape, a counter coupled flare 3 with the formation of the output slotted nozzle 4 between them.

The flange 3 is rigidly fastened evenly distributed around the perimeter of bolts 5, a torque washer 6 between which troobleshoot annular nozzle 4 of a specified profile and flow section.

At the bottom of the tank 2 (lower in the drawing) via the functional layer 7 of curable material, preferably of plaster attached pyrotechnic checker 8, during combustion which is generated extinguishing gaseous mixture of flame retardants.

In the solution construction plaster poured into the container 2, free and easy (before curing) pyrotechnic set piece 8, which is rigidly fixed layer 7 of the hardened plaster, tightly adjacent to the profile of the bottom of the container 2, the end face of the layer 7 is located at the level of its flanging 3.

In this part of the lateral surface of the pyrotechnic checkers 8, located in the upper container 1 and is located above the end face of the layer 7 remains �open.

At the open end checkers 8, spaced at a distance from the bottom of the upper tank 2, forming a receiver 9, is mounted igniter charge from 10 sensitive to the heat pulse train that is generated by glowing of an electric resistor bridge, built inside of the igniter charge 10 (not shown) and by means of a cord 11 connected to the terminal pads 12 supply from the external trigger device.

Insulating layer 13 of the plaster covering the perimeter of the container 1, fenced mounted equidistant perforated sidewall 14 that is permeable to steam when heated, the structural water of gypsum.

The receiver 9 through the annular reverse channel 15 (between the open side surface checkers 8 and a perforated sidewall 14), which is bounded from below by the face of the interlayer 7, communicates with the output gap nozzle 4.

On radial threaded axles 16, diametrically fixed in the interlayer 13 through the through hole in the tank 1, installed the bracket 17 for mounting the generator on load-bearing surfaces in the protected area.

The bracket 17 is a block 12 of the telecommunication igniter charge 10 with sensor fire alarm - external starting device.

Operates the aerosol fire extinguishing generator as follows.

When the initi�probing the igniter 10 is switched manually or automatically by the pulse from the sensor fire alarm heat pulse ignites the pyrotechnic grenade 8.

As a result of combustion checkers 8 to open the developed surface of the generated gaseous products are condensed and dispersed phase of the aerosol is received in the receiver 9 and then into the annular reverse channel 15, where they are mixed, expand and decelerate, and when pressure compensation.

The flame heats the perforated shell 14, with radiation from which the gypsum layer 13 is evaporated structural water flowing through the perforations distributed transverse jets in the receiver 9 and the channel 15, diluting and cooling the fire-extinguishing aerosol.

After an intense filling volume of the gas-aerosol generator products flux reflected from the end face of the interlayer 7, expands and is ejected through the slit nozzle 4 extending annular flow volume of the protected space, filling the space.

Thus inhibitors of combustion (gaseous and fine condensed particles) contained in the fire extinguishing mixtures, actively enter into a chemical reaction and interrupt the chain reaction of combustion, resulting in fire suppressed.

Further, when burning quickly open part of the checkers 8, combustion occurs in layers with its end, as the side surface of the armored termozaschitnym plaster layer 7, resulting in reduced intensity of feeding extinguishing cm�si in the protected volume, where it pushes the cooled aerosol in place, preventing it settling.

Additional flow in the protected volume of the gas-aerosol mixture ensures the achievement of extinguishing concentration of flame retardants, resulting in a fire suppressed and does not occur again.

Comparison of the proposed technical solutions to identified analogues of the prior art has not revealed exact matches are the essential features of the invention.

Proposed differences between the aerosol fire extinguishing generator are not obvious to a person skilled in fire fighting techniques, which directly follow from the statement of the technical problem.

The production of the totality of the structural elements of the generator in their relationship it is possible to implement on existing production, where generators are manufactured counterparts on existing technology.

From the above we can conclude that the invention meets the patentability requirements.

Tests of prototypes of the proposed aerosol fire extinguishing generator confirmed the positive results on the reliability specified in the regulations with increased efficiency of operation by appointment, which allows us to recommend technological design for commercial production and post�VKI customers.

The aerosol fire extinguishing generator containing the feature triggering unit pyrotechnic grenade, mounted on the bottom of one of the two hull vessels disc shape, inside is covered with a functional layer of curable material, which counter joined by flanging, forming the output slit nozzle, wherein the functional layer of the upper capacity fenced perforated sidewall and an open end formed checkers receiver communicating via a reversible annular channel with the output gap nozzle, characterized in that the reversible annular channel between the perforated sidewall and the open part of the pyrotechnic checkers is associated with the output gap nozzle and is limited adjacent to the flanging of the bottom tank end face of the functional layer, which covers the gap between the bottom tank and checker.



 

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Extinguisher // 2460557

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FIELD: mechanics.

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Fire-extinguisher // 2311936

FIELD: fire-fighting equipment, particularly fire-extinguishers, for instance powder fire-extinguishers.

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1 dwg

FIELD: masking.

SUBSTANCE: the masking foam material is dispersed by means of a pulse distributor, which is preliminarily installed on the surface of the background and/or object in compliance with the plan of masking. The pulse distributor by means of a supply network is connected to the control panel, having an electric power source, or it is provided with a radio command actuator with an electric power source, and connected to a radio command control panel. The time and procedure of actuation of the pulse distributor is selected in compliance with the plan of masking. The pulse distributor of masking foam material has a sealed body with a solution. The body with the source solution is provided with a siphon, two valves and a guide. A packing having an opening and distribution assembly, actuating and safety, assemblies, is installed on the body neck. The body neck is integrated with the siphon cylinder, and a splash-out monitoring system is additionally installed on the device body, aligned with the stopper of the packing safety assembly. The valves are installed at the upper and lower levels of the body.

EFFECT: enhanced efficiency of masking.

17 cl, 5 dwg, 1 tbl

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