RU2448750C1 - Foam generator - Google Patents

Foam generator Download PDF

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Publication number
RU2448750C1
RU2448750C1 RU2011103860/12A RU2011103860A RU2448750C1 RU 2448750 C1 RU2448750 C1 RU 2448750C1 RU 2011103860/12 A RU2011103860/12 A RU 2011103860/12A RU 2011103860 A RU2011103860 A RU 2011103860A RU 2448750 C1 RU2448750 C1 RU 2448750C1
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RU
Russia
Prior art keywords
made
nozzle
holes
diffuser
form
Prior art date
Application number
RU2011103860/12A
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Russian (ru)
Inventor
Олег Савельевич Кочетов (RU)
Олег Савельевич Кочетов
Мария Олеговна Стареева (RU)
Мария Олеговна Стареева
Original Assignee
Олег Савельевич Кочетов
Мария Олеговна Стареева
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Application filed by Олег Савельевич Кочетов, Мария Олеговна Стареева filed Critical Олег Савельевич Кочетов
Priority to RU2011103860/12A priority Critical patent/RU2448750C1/en
Application granted granted Critical
Publication of RU2448750C1 publication Critical patent/RU2448750C1/en

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Abstract

FIELD: fire fighting.
SUBSTANCE: foam generator has a sprayer connected to the casing of the ejecting nozzle, made in the form of a diffuser set axisymmetrically with respect to the sprayer. A mesh divider of two-phase flow is installed on a section of the diffuser. The sprayer consists of an throttling washer with an annular rib facing the nozzle with a flange perpendicular to the axis of the throttling washer and the hole axle made in the nozzle, and the flange is rigidly connected to the annular rib to form a cylindrical expansion chamber, and in the throttling washer there is one central through hole, and at least two rows of through holes concentrically arranged in circles, in each row at least three holes are made, and the values of the diameters of the holes decrease from the center hole to the peripheral. On the casing of the ejecting nozzle made in the form of a diffuser, in the part located close to the sprayer, at least three windows for ejection of air are made, and at the outlet of the diffuser a mesh divider of two-phase flow is fixed, made in the form of two series-connected networks, one of which has a shape of a circle, and the other has a shape of a hemisphere.
EFFECT: increased efficiency of spraying of fire-extinguishing liquid solution of foaming agent (high-expansion polydisperse foam).
1 dwg

Description

The invention relates to the field of fire fighting equipment and is intended for use in automatic fire extinguishing systems by generating highly multiple polydisperse foam under conditions of smoke in the room while blocking fast-burning products with high-polydisperse foam.

The closest technical solution is a foam generator containing a spray, foam nozzle and a two-phase flow divider (RF patent No. 2136389, B05B 1/04, 1998 - prototype).

The disadvantages of the known object are the lack of the ability to create the optimal structure of the flow at the outlet and the insufficient efficiency and performance of spraying a fire extinguishing liquid solution of a foaming agent (high polydisperse foam).

The technical result is an increase in the spraying efficiency of a fire extinguishing liquid solution of a foaming agent (high polydisperse foam).

This is achieved by the fact that in a foam generator containing a spray nozzle, a foam nozzle and a two-phase flow divider, the spray nozzle is connected to the body of the ejection nozzle made in the form of a diffuser mounted axisymmetrically relative to the nozzle, at the cut of which a mesh divider is installed, while the nozzle consists of a throttling washer with an annular flange facing the nozzle with a flange perpendicular to the axis of the throttling washer and the axis of the hole made in the nozzle, while the flange is rigidly connected to an annular bead, with the formation of an expansion cylindrical chamber, and in the throttling washer one central through hole is made, and at least two rows of through holes concentrically arranged around the circumferences, at least three holes are made in each row, and the diameters of the holes decrease at least three windows for ejecting air are made from the central hole to the peripheral, at the same time, on the body of the ejection nozzle, in the part located closer to the sprayer, and a fuser is fixed to a mesh divider of a two-phase flow, made in the form of two series-connected grids, one of which has the shape of a circle, and the other is hemisphere.

The drawing shows a General view of the foam generator ejection type.

The ejection-type foam generator includes a spray gun, which is rigidly connected to the body 11 of the ejection nozzle, made in the form of a diffuser mounted axisymmetrically relative to the spray gun, on the cut of which a mesh divider 13 is mounted.

The sprayer consists of a throttling washer 4 with an annular bead 5 facing the nozzle 1 with a flange 3 perpendicular to the axis of the throttling washer 4 and the axis of the hole 2 made in the nozzle for supplying a foaming and extinguishing solution. The flange 3 is rigidly connected to the annular flange 5 with the formation of an expansion cylindrical chamber 9, coaxial to the axis of the hole 2.

In the throttling washer 4 there is one central through hole 6 and at least two rows of through holes concentrically arranged around the circles of rows 7 and 8, with at least three holes made in each row. The values of the diameters of the holes decrease from the central hole 6 to the peripheral 8, so that at the beginning of the plume the sprayed spray of the foaming agent solution (or of the two-phase system: powder-air) has the highest speed and foam is formed with bubbles as small as a result of air ejection (2 ÷ 3 mm across), and with larger bubbles (4 ÷ 12 mm across). Thus, the foam generator produces polydisperse (differently sized for bubbles) foam, which has the property of rapid spreading over the surface.

At least three windows 10 for ejecting air are made on the housing 11 of the ejection nozzle, in the part closer to the atomizer, and a two-phase flow mesh divider 13 is made at the outlet of the diffuser, made in the form of two series-connected grids, one of which 12 has the shape of a circle, and the other 13 - hemispheres.

Foam ejector type works as follows.

In the event of a fire, a pumping unit (not shown in the drawing) delivers a foaming solution from a metering tank or a fire truck to the inlet pipe of the foam generator connected to the nozzle 1, from where it is supplied through openings 2 and chamber 9 to openings 6, 7, 8, made in a throttling washer 4, which are connected to the inlet of the diffuser 11, and air is ejected through the windows 10 of the diffuser to form a foam, which is sent to the divider 13 of the two-phase flow. At the beginning of the torch, the sprayed spray of the foaming agent solution has the highest speed and due to air ejection a foam is formed with bubbles of both small and large sizes. Thus, the foam generator produces polydisperse (differently sized for bubbles) foam, which has the property of rapid spreading over the surface.

Tests have shown that even in conditions of intense smoke, foam is formed in predetermined volumes and has good resistance to decay.

As a foaming agent in such fire extinguishing systems, a fluorosynthetic foaming agent of the "Multipena" type is used. The foam generator also works on a 6% aqueous solution of fluorinated foam former "Sublayer" in the conditions of smoke in the room.

The foam generator is universal and designed to supply foam in various fire extinguishing systems, for example in fire extinguishers, automatic fire extinguishing systems of closed technological rooms (supplying foam to the place of ignition), where vapor and gas mixtures may form, for example, in pump rooms of pumping stations, chambers pressure regulation, etc.

Claims (1)

  1. A foam generator comprising a spray gun, an ejection nozzle and a two-phase flow divider, characterized in that the spray gun is connected to the body of the ejection nozzle made in the form of a diffuser mounted axisymmetrically relative to the spray gun, on the cut of which a mesh cutter is installed, and the spray gun consists of a throttling washer with a ring facing the nozzle with a flange perpendicular to the axis of the throttling washer and the axis of the hole made in the nozzle, while the flange is rigidly connected an annular flange with the formation of an expansion cylindrical chamber, and in the throttling washer there is one central through hole and at least two rows of through holes concentrically arranged around the circumferences, at least three holes are made in each row, and the diameters of the holes decrease from the central openings to the peripheral, at the same time, at least three windows for ejection of air are made on the body of the ejection nozzle in the part closer to the atomizer, and at the outlet fuzora fixed net phase flow divider formed by two series-connected networks, one of which has a circular shape, and another - of a hemisphere.
RU2011103860/12A 2011-02-03 2011-02-03 Foam generator RU2448750C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2011103860/12A RU2448750C1 (en) 2011-02-03 2011-02-03 Foam generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2011103860/12A RU2448750C1 (en) 2011-02-03 2011-02-03 Foam generator

Publications (1)

Publication Number Publication Date
RU2448750C1 true RU2448750C1 (en) 2012-04-27

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2497561C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Foam generator of ejection type
RU2497562C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Vortex foam generator of ejection type
RU2497563C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Fire-extinguishing module of kochetov
RU2532800C1 (en) * 2013-11-06 2014-11-10 Олег Савельевич Кочетов Atomiser with active spreader
RU2533109C1 (en) * 2013-12-18 2014-11-20 Олег Савельевич Кочетов Flow spreader for liquid sprayers
RU2536643C1 (en) * 2013-11-27 2014-12-27 Олег Савельевич Кочетов Kochetov's centrifugal wide flame sprayer
RU2545257C1 (en) * 2014-05-14 2015-03-27 Олег Савельевич Кочетов Acoustic swirl atomiser
RU2550840C1 (en) * 2013-12-18 2015-05-20 Олег Савельевич Кочетов Liquid flow divider of ejection type
RU2551460C1 (en) * 2014-05-14 2015-05-27 Олег Савельевич Кочетов Pneumatic vortex injector
RU2625847C1 (en) * 2016-06-10 2017-07-19 Олег Савельевич Кочетов Liquid flow ejector-type spreader for nozzle
RU2642647C1 (en) * 2017-02-27 2018-01-25 Олег Савельевич Кочетов Foaming generator with a mesh cutter

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2497561C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Foam generator of ejection type
RU2497562C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Vortex foam generator of ejection type
RU2497563C1 (en) * 2012-11-20 2013-11-10 Олег Савельевич Кочетов Fire-extinguishing module of kochetov
RU2532800C1 (en) * 2013-11-06 2014-11-10 Олег Савельевич Кочетов Atomiser with active spreader
RU2536643C1 (en) * 2013-11-27 2014-12-27 Олег Савельевич Кочетов Kochetov's centrifugal wide flame sprayer
RU2533109C1 (en) * 2013-12-18 2014-11-20 Олег Савельевич Кочетов Flow spreader for liquid sprayers
RU2550840C1 (en) * 2013-12-18 2015-05-20 Олег Савельевич Кочетов Liquid flow divider of ejection type
RU2545257C1 (en) * 2014-05-14 2015-03-27 Олег Савельевич Кочетов Acoustic swirl atomiser
RU2551460C1 (en) * 2014-05-14 2015-05-27 Олег Савельевич Кочетов Pneumatic vortex injector
RU2625847C1 (en) * 2016-06-10 2017-07-19 Олег Савельевич Кочетов Liquid flow ejector-type spreader for nozzle
RU2642647C1 (en) * 2017-02-27 2018-01-25 Олег Савельевич Кочетов Foaming generator with a mesh cutter

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