SU704630A1

SU704630A1 - System for feeding air and mechanical foam

Info

Publication number: SU704630A1
Application number: SU772504566A
Authority: SU
Inventors: Алексей Сергеевич Мечев; Григорий Ефимович Волик
Original assignee: Особое Конструкторское Бюро Пожарных Машин
Priority date: 1977-07-07
Filing date: 1977-07-07
Publication date: 1979-12-25

Description

(54) СИСТЕМА ДЛЯ ПОДАЧИ ВОЗДУШНОМЕХАНИЧЕСКОЙ ПЕНЫ(54) SYSTEM FOR SUPPLY OF AIR-MECHANICAL FOAM

1one

Изобретение относитс к противопожарной технике, в частности к пожарным автомобил м аэродромной службы, использующим запас вывозимых огнетушащих средств.FIELD OF THE INVENTION The invention relates to fire fighting equipment, in particular, to firefighters of an aerodrome service using a supply of exported extinguishing agents.

Известна система дл подачи воздушно-механической пены, содержаща баки дл воды и Пенообразовател , центробежный насос, соединенный с баком дл пенообразовател через дозирующее устройство и пенный ствол с посто нным гидравлическим сопротивлением 1.A known system for supplying an air-mechanical foam, comprising water tanks and a Frother, a centrifugal pump connected to the tank for the frother through a metering device and a foam barrel with a constant hydraulic resistance 1.

Недостатком этой системы вл етс необходимость подачи части жидкости с напорного патрубка во всасьшающий. Это. увеличивает объемные потери насоса и снижает производительность пенного ствола, что в целом делает систему малоэффективной .The disadvantage of this system is that it is necessary to supply part of the liquid from the discharge pipe to the inlet. It. increases pump volume losses and reduces the performance of the foam barrel, which generally makes the system ineffective.

Целью изобретени вл етс повыщение. эффективности системы.The aim of the invention is to increase. system performance.

Это достигаетс тем, что дозирующее устройство выполнено в виде нерегулируемого / дроссел .This is achieved in that the dosing device is designed as an unregulated / throttle.

На чертеже приведена функциональна схема системы дл подачи воздущно-механической пены.The drawing shows the functional diagram of the system for supplying air-mechanical foam.

Одна содержит бак I д воды и бак 2 дл пенообразовател , которые соединенны со всасьгоающей полостью насоса 3 трубопроводами 4 и 5, снабженным запорными устройства- . ми 6 и 7. На трубопроводе 5 установлен нерегулируемый дроссель 8. Напорна полость насоса 3 трубопроводом 9 с запорнь1м устройством. 10 сообщена с пенным стволом 11.One contains a tank of water Id and a tank of 2 for a blowing agent, which are connected to the suction cavity of the pump 3 by pipelines 4 and 5, equipped with shut-off devices-. mi 6 and 7. On the pipe 5 an uncontrolled choke 8 is installed. The discharge cavity of the pump 3 is pipe 9 with a locking device. 10 communicated with the foam barrel 11.

Система работает спедуюн им образом.The system works in a different way.

Claims

Water from the tank 1 enters the pump 3 and then into the foam barrel 11. At the same time, a vacuum is formed in the suction cavity of the pump 3 and pipes 4 and 5, due to which the frother from the tank 2 is sucked into the pump 3. Since the foam barrel 11 is constantly this hydraulic resistance, and the pressure in front of it to ensure quality pricing and to obtain the required jet delivery range is maintained within the established narrow range; nical constant. Therefore, in order to obtain the required dosage of foam in a machine, an unregulated throttle 11. Invented system for supplying an air-mechanical foam containing water tanks and a foaming agent, a centrifugal pump connected to a bridge by a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a head, a bridge, a bridge, a bridge, a head, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge, a motor), and an air flow, is supplied with air and a foam, a tank that contains water tanks and a frother, a centrifugal pump, connected to a bridge by a bridge and a bridge, which is equipped with a bridge and a bridge, which is a body that has a head, and a head section, a bridge, a bridge, a bridge, a bridge, a bridge, a bridge is set, a bridge, a bridge is set, a bridge, a bridge, a bridge is made by a bridge, a bridge is made by a bridge, which is connected to the body of the air. Gadravlichko resistance, characterized in that, in order to increase its effectiveness, the dosing device is designed as an unregulated throttle. Sources of information taken into account in the examination 1. Instructions for the operation of a fire tanker ATs-40, 131-137, M., 1974, p. 9-12.

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