SU1314995A1 - Method and apparatus for putting out a fire - Google Patents

Abstract

The invention relates to fire extinguishing, mainly for eliminating the fires of turbine and transformer oils due to accidents of electrical installations under voltage, using multiphase aerosol of fire extinguishing composition and allows to increase the extinguishing efficiency. When refrigerant is supplied to pipeline V 4, hydraulic actuator 3 begins to rotate fan 2, creating turbulent air flow along housing 1. Air flow from fan 2 causes impeller 7 to rotate, affecting its blades 8 protruding inside of housing 1. Axis 6 of impeller is displaced with respect to the outlet of the bunker in the direction of placement of the driver 5. When one of the blades in the process of rotation goes inside the case, a stream of air from the fan enters it, due to which fluidization of the powder occurs. With further rotation of the impeller, the powder enters the stream of air moving along the body, forming an air suspension. A multi-phase fine aerosol is formed at the exit of the housing, which is fed to the combustion zone for 2 s. and 1 z. p. f-ly., 1 ill. i (L / / s 4 CO with SP u

Description

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The invention relates to fire fighting and can be used primarily to eliminate fires of turbine and transformer oils, due to an accident of electrical installations under voltage, using a multi-phase aerosol to extinguish the composition.

The purpose of the invention is to increase the efficiency of quenching.

The drawing shows a diagram of the device for implementing the method of extinguishing a fire.

The device has a housing 1, at the entrance to which a source of compressed gas is installed, made in the form of a valve torl 2 driven by a hydraulic actuator 3 installed in the refrigerant supply pipe 4, which is filled with a nozzle 5, which serves to disperse the refrigerant. fluidization of the powder made in the form of an impeller 7 mounted on an axis 6 with blades 8. On the impeller casing there is mounted a hopper 9 with a fire-retardant powder, having in its outlet 10 a valve 11 for controlling the flow rate CABG. The pipeline 4 is installed along the longitudinal axis of the housing 1, and the impeller blades are profiled in the direction of rotation and mounted tangentially to its axis 6, which is offset relative to the outlet 10 of the hopper 9 towards the nozzle 5.

The device works as follows.

When the refrigerant is supplied to the pipeline 4, the hydraulic actuator 3 begins to rotate the fan 2, which creates a turbulent flow of air along the housing 1.

The air flow from the fan causes the impeller 7 to rotate, acting on its blades 8, and protruding inside the housing. The impeller axis 6 is displaced relative to the outlet of the bunker towards the placement of the nozzle 5. Therefore, the fire extinguishing powder arriving on the blade 8 of the impeller 7 from the bunker 9 after opening the damper 1I increases the moment of force that rotates the impeller. To increase the torque, the blades can be set tangentially to the blade axis. For some time after leaving the bunker, the portion of powder is in a closed position along 952

of the cavity bounded by adjacent blades and housing 1. When one of the blades goes into the housing during rotation, the cavity ceases

to be closed and air through the gap between the casing and the impeller blade enters the air stream from the fan. When this occurs, the fluidization of the powder. To increase the rate of air entering the inter-blade cavity with the impeller blade powder, they can be shaped in the direction of rotation. In the process of further rotation of the impeller, the hydrogam enters the stream of air moving along the body to form an aerosol. At the exit, e from the body of the us-ram, the turbulent flow interacts with the dispersed stream of refrigerant, contributing to an increase in the dispersion of the liquid phase.

The formed multiphase (gas - + liquid + solid particles) fine aeroso; P) is fed to the combustion zone. The presence in the multiphase flow of unwetted 1.1 × powder particles allows pn1 to bend the process of guine immediately upon entering the flame zone (without the evaporation stage required for wetted particles). The outflow of a dispersed jet of liquid into a wake-up air ass makes it possible to increase the delivery distance of the aerosol extinguishing agent.

The fine dispersion of the liquid phase contributes to the effectiveness of extinguishing, since at a constant flow rate of the refrigerant, the smaller the droplet size, the larger the total surface area

liquid phase, which significantly increases the cooling rate of the combustible liquid, as well as the mass evaporation rate of the refrigerant, and therefore the cooling rate of the flame zone and

the high-temperature products of Oyura-NIN and the reflux of the combustible 1 azov mixture.

Testing devices for extinguishing spilled burning turbine oil

multiphase fine aerosol fire extinguishing composition showed that, in accordance with the selected modes of operation, the proposed device can reduce the time of pulling with

optimal consumption of powder and sprayed water, thus increasing the range of supply of fire substances, which allows you to choose safe races

at high density of heat fluxes and more efficiently, fires occur in large areas. The supply to the combustion zone of a multiple stream flow y, ke in the first seconds inhibits the flame and lowers the temperature, which is especially important during fires in rooms where there are unprotected metal trusses. For example, fire suppression with the use of the proposed device on an area of 30 m takes 20-24 seconds, and fire rods equipped with 1PT nozzles 50- 60 seconds. In this case, in the first case, flame is inhibited in the first seconds, l but r torog. - -; o - p; : - tdnie density Tenjioi..r.ro and. gu S-chshn,

F

pm lla

T e N and l

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bathroom cladag ent.h f, 4i scor. m ;; It is not lower than the ipoi speed (iy -onoT4 i flow.

2. Device l ,. TynH Hif :: rm gt ;, containing a hollow body with a bunker 1H) for a fire extinguishing powder, connecting with a node for its pseudo (case, and a source of compressed gas, about which it is n to improve the efficiency of 1-US1111ICH, it is | (it is installed on the body of its case along its lengthwise axis of the trspronod for supplying and aligning) (- at the end of the pipeline; - from B1, 1 out of the nozzle body / cn di spergiropany nor refrigerant

) jCf l; It V H FPI: M G ;. :, -. VI; K Kr1 :: 1, L1, mustache l .- M: I CHI; H rift-m

ofipa u: M, h n 1 (0 K n I.- ;;:: P;. i-ii;. i in no.: i (iCTii: oi),.

1. Tyii: i HiL4 cook method, and

simultaneous nodach to zone

Repi fire extinguisher 1TS01 (.) (v; iKa and rajonogo po1ok, about tl and h and y and 25 with the fact that, with a whole 1 noshishshsh-.: 1 (b (1) With KGI1 -

stupidity: e11i, in 1 azonoric1y1; g; o-

the current is supplied by a dim stg.

Editor S.Pekar

Compiled by V. Komissarov

Tehred M. KhodanychKorrektor G.Reshetnchk

Order 2230/2 Circulation 429Subscription

VNIGSHN State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Free will} shou-1 graphic arts enterprise, Uzhgorod, ul1

Claims (1)

Claim 11C t o · / '·: ·' GT 1 Research Institute j G [and ··! ·  G; · pi; K * K [) 1: 1 / 1GCH '! Li _h Vc 1 · And OS ' ^t - i: 1; T'I about 61 O 'SP WHAT WITH ·? ΊΟΊΙ4  'g';; .g n: 20 ^{in 1} CAVITY accumulate I. 1. A method of extinguishing a fire, which simultaneously delivers a fire-extinguishing powder and a stream to rhenium, with the exception of the fact that, in order to increase the extinguishing ability, a cis stream is fed into the gas powder vkiyuna- 3. Device zone h a p p t : gas oβο- impellers 4/1 1 ή s h 25 Lenia Gatekeeper in with off-ok type- JJB Z. BUT TO S-1? OS! "To SHOW ΠΟ- ΒιΚ’πτο.τ, ΐϊ 'ΐ /; g; feet nergy- pa r side us '/ Gt