SU755281A1 - Fire barrier - Google Patents

Description

The invention relates to the field of fire safety and relates to devices for ensuring the explosion-proof processes associated with the production, transportation and use of combustible gases.

Known flame arrester, including an insert of insulating material having channels for the passage of gas, and electrodes connected to a source of high voltage [1].

However, this flame arrester has low teplofieichsskimi properties, thereby reducing the eff -... '' ⁵ ciency localization emerging explosions.

The purpose of the invention is to increase the efficiency of work. , 20

To achieve this goal, the well-known flame arrester is additionally equipped with an ignition indicator and an element switched with it to turn on the high-voltage source, and the insert through holes have longitudinal grooves, while the electrodes are made in the form of bundles of synthetic fibers and laid in longitudinal grooves. thirty

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Figure 1 shows the arrester before the appearance of the source of ignition; figure 2 - section aa in figure 1; in fig. 3 — flame arrestor after the discovery of the ignition center; 4 is a section BB in FIG. 3

The arrester contains an insert of insulating material 1, in which there are through holes for the passage of gas 2, having longitudinal grooves 3. Electrodes 4 and 5, made in the form of bundles of synthetic fibers, are attached to the longitudinal grooves, high-voltage source 6 is connected to electrodes.

To turn it on, the flame arrester is equipped with an ignition indicator 8 switched with element 7.

As an indicator of ignition 8, ultraviolet or infrared radiation sensors or other known devices that respond to the ignition phenomenon can be used. . For the manufacture of electrodes 4 and 5 can be used produced by domestic industry synthetic fibers (filaments) with a diameter of 15-25 microns.

755281

As a controlling element? It is most advisable to use a lamp-based electronic key - a thyratron, which allows you to automatically turn off the source of high voltage in the absence of a flame in the field of view of the ignition indicator.

The arrester operates as follows.

When a flashpoint appears, the indicator 8 detects it and, with the help of the switching element 7, switches on the high-voltage source 6. As a result of this, each electrode 4 and 5 is supplied with a direct current of one sign with a voltage of about 30 thousand volts. Under the action of an electrostatic field, flagella diverge with a cone, filling the corresponding insertion channel with flame-retarding fibers. Passing through the flame arrester, the explosion flame cools down to safe limits and therefore is not able to ignite the explosive mixture placed behind them. After the suppression of the explosion, the high voltage source 6 is turned off.

The use of the proposed flame arrester allows you to increase the critical diameter of the flame-arresting channels not only due to the action of the electromagnetic field, but also due to the filling of the through holes at the time of flame registration with a fibrous material.

As a result, the hydraulic resistance of the pipeline is reduced, the length of the insert is reduced, and the efficiency of localization of rapidly developing explosions is increased.

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Claims (1)

Claim A flame arrestor containing an insert of an electrically insulating material, in which there are through holes for the passage of gas, electrodes and a high-voltage source connected to them, characterized in that, in order to increase work efficiency, it is equipped with an ignition indicator and a source switched on with it high voltage, and the through holes of the insert have longitudinal grooves, while the electrodes are made in the form of bundles of synthetic fibers and laid in the longitudinal grooves.