Carbon Dioxide Fire Extinguishers

Carbon dioxide fire extinguishers – extinguishers are gas, in kotoryh as the gas carbon dioxide ispol. Quenching mechanism based on charge vytesnenii extinguisher under its own izbytochnogo davleniya, kotoroe created by filling a fire extinguisher. Posle charge displacement of carbon dioxide is an increase of its volume in a few soten times. Intruding into the combustion zone, carbon dioxide reduces the specific content of oxygen in the combustion zone to level where further combustion becomes impossible. Carbon dioxide is still expanding lowering the temperature in the combustion zone (up to -70 C). Carbon dioxide fire extinguisher consists of a steel cylinder and LSD – stop-start device. LSD is screwed into the neck of the container.

LSD is installed on the socket, designed to supply extinguishing agent (in this case carbon dioxide) into the combustion zone. Fig. LSD for carbon dioxide fire extinguisher. Figure. The design of LSS.

1 – lever, 2 – pruzhina 3 – gasket, 4 – seat 5 – gayka 6 – hvoctovik 7 – cuff, 8 – valve stem 9 – arm axle, 10 – seal. LSD head screwed hvostovikom (6) goplovinu ballona. Raised arm (1) shut-off valve pressed by the spring (2) to the saddle (4). Activation of the LSD is made by turning the lever (1) to stop (as shown in the second position the lever). Due to the shift lever pivot protrusion eccentric surface presses the valve stem (8) and opens the valve to release the charge from the cylinder. To stop the charging lever (1) should be turned to its original position. From a careless accidental activation lever is held safety seal (10). Classification of carbon-dioxide fire extinguisher according to the method of displacement of the charge on the principle of displacement charge (fire extinguisher) extinguishers are divided into the following types: – Zakachnye. Charge extinguishing agent nahoditsya under pressure of working gas injected directly into cylinder fire extinguisher – With gas-generating element. Izbytochnoe pressure in the shell creates a fire extinguisher gas, which released into the hode chemical reaction between the components of the charge gas-generating element. – With high-pressure tank to store compressed or liquefied gas. Excessive pressure in the liner creates a fire extinguisher compressed or liquefied gas, which is contained in a separate container, kotory can be located inside or outside the enclosure extinguisher. Haibolshee widely zakachnye carbon dioxide fire extinguishers. History Carbon dioxide extinguishing ognetushiteley creator of the idea of burning uglekislotoy yavlyaetsya Russian scientist Mikhail Kolesnik, Kulevich. In 1989, he justified the method of gas extinguishing systems. He did vyvod that “to extinguish the flames substance should be gaseous or easily turning into gas. ” As one of the gases scientists consider dvuokis ugleroda. Also, the name of the scientist associated with the scientific justification for the idea of powder formulations. However, in the U.S. believe that carbon dioxide fire extinguisher invented by ‘Walter Kidde Company’ in 1924 at the request of . The essence of the inquiry – the development of non-conductive extinguishing agent. Carbon dioxide fire extinguishers in Russia ognetushiteli Carbon dioxide in our country presented a model number of the OS (Uglekiclotny extinguisher). Distinguish portable OU (OU-1, 2, 3, 4, 5) and mobile OS, osnaschennye wheel pair (from the OC-10). Fire extinguishers, carbon dioxide and are subject to mandatory certification tested according to the BNP.

Electromechanical Barriers

About barriers and not only … The dictionary Dahl appears: BARRIERS – German. standpipe timber which is locked passage; zheravets, ochep, overweight, outpost. For many years the barrier has changed little, but still suffered a serious modernization. The barrier of the 21st century – a mechanical device operated manually or fully automatic unit, controlled by buttons or by remote control. The automatic barrier is simple. He consists of a rack placed inside a gear motor and control unit, as well as arrows. Depending on the actuator arm, automatic barrier may be a hydraulic or electromechanical.

Electromechanical barriers. Advantages: simple design, low cost, high maintainability. Disadvantages: slightly more than less than hydraulics life. Some manufacturers: CAME, NICE, DITEC. Hydraulic barriers. Advantages: reduced friction in the construction of the barrier to mechanical parts. They have been replaced by a hydraulic drive, which leads to some increase in service life. Disadvantages: Very low maintainability (if Fault is useful to replace the compressor and the hydraulic cylinders).

Some manufacturers: FAAC. Features barriers. Managing barrier may be accomplished by remote keyfob transmitter (the remote control to the barrier) transmitting the encoded digital signal, or by means of such control devices as the key-switch, magnetic card, push button or position of a single button control operating mode (open – stop – close), which facilitates the operation of the barrier. The equipment can be equipped with safety devices – solar cells that block the work of the barrier, while in their area vehicle or person, as well as the warning light (flashing light) blinks during the boom. The barrier is equipped with an unlock when power is off, the barrier can be placed in manual mode. Electronic control board allows for features such as automatic closure of the barrier, the synchronization of the barrier, slowing down arrows at the bottom of the loop opening – closing. ! Personal experience. Our experience company tinning barriers showed that the fault in the automatic barriers arise, as a rule, not as a result of time between failures, and as a result of some external mechanical damage. In this regard, we Electromechanical barrier to stop, repair period not exceeding five days and repair costs are much lower than that of hydraulic barriers. Design, reliability and cost barriers CAME, NICE, DITEC about the same, but the parts are always available from stock holding only representatives of the company CAME. Our choice. It is noteworthy that the ratio of “price – quality – maintainability ‘, we stopped at the barrier CAME, since the logic of this equipment is extremely simple, regularly supplied parts, remote control of all upgrades are compatible with each other, the demands to the supply voltage 15%, which is close to the domestic state standard of 20%.