SU1762948A1 - Filtering-absorbing box of gas mask - Google Patents

Abstract

The invention relates to a device for filtering and absorbing a gas mask box and can be used in the protection of respiratory organs from vapor-gas substances and aerosols. The aim of the invention is to reduce the resistance while maintaining the duration of the protective action of the box and increasing its tightness. The box includes two cylindrical bodies connected through an annular sealing gasket, in which an anti-aerosol filter and a mixture with restrictive nets are installed. The distance between the anti-aerosol filter and the restrictive mesh of the charge body facing towards it is (2.5 .., 5.2%) the height of the charge. The case for installing the charge is made with an outer annular protrusion, the case for installing an anti-aerosol filter with an annular shoulder, the latter enclosing the protrusion of the case for installing the charge. The end edge of the step is in contact with the same protrusion from the side opposite to the anti-aerosol filter. An annular sealing gasket is installed between the protrusion and the ledge of the housings on the side of the anti-aerosol filter. 1 epf-ly, 2 Il. sl C

Description

The invention relates to respiratory protection devices against airborne substances that are not suitable for respiration.

The aim of the invention is to improve the performance by reducing the aerodynamic drag while maintaining the duration of the protective action.

Figure 1 shows the box, a general view; figure 2 - node I in figure 1.

The filtering and absorbing box of the gas mask contains two cylindrical bodies 1 and 2 interconnected.

An anti-aerosol filter 3 is installed in body 1, and charge 4 is installed in body 2. Charge 4 is enclosed between restrictive grids 6 and 5. Anti-aerosol filter 3 and the restrictive network 6 of charge body facing it are spaced from each other (2 , 5 ... 5.2)% of the height of the charge 4. Case 2 is made with an outer annular protrusion 7, and the case 1 is an annular ledge 8 covering the protrusion 7 and an end edge 9 in contact with the same protrusion 7 from the side opposite the filter 3. The sealing gasket 10 is installed

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between the protrusion 7 and the ledge 8 from the filter 3.

Air from the environment contaminated with gases (vapors) and aerosols through the opening 11 in the bottom of the box enters the anti-aerosol filter 3 and, after clearing the aerosol particles, to the charge 4 where harmful gases (vapors) are absorbed and through the screwed neck 12 enters through a mask gas mask in the human respiratory system.

The filter-absorbing box is loaded in the following sequence:

-green charge 4 is poured into the charge body 2, in which one of the restrictive grids 5 is fixed, compacted, overlapped by a second grid 6, which zazigigoes on the body 6 under pressure;

- anti-aerosol folded filter 3 is sealed in housing 1 by centrifugal filling with sealant;

- an annular sealing gasket 10 is mounted on the outer annular protrusion 7,

-cases 1 and 2 are aligned so that the annular sealing gasket 10 is located on the outer protrusion 7 on the side facing the anti-aerosol filter 3 and the end edge 9 is rolled to the outer protrusion 7 on the side opposite to the anti-aerosol filter 1.

As the distance between the restrictive screen and the aerosol filter increases, the protective time decreases as the charge height decreases, while the resistance to constant air flow also decreases (by 10–18%). At a distance of (2.5-5.2)% of the height of the charge, the time

protective action meets the requirement. When the distance is reduced to 0-0-0,5 mm (less than 2.5% of the height of the charge), the resistance starts to increase - up to 14,0-16,2 mm

water column over a distance of more than 5.2%, the resistance practically remains constant, therefore a further increase in the distance is impractical, especially since with constant box dimensions

will reduce the time of protective action.

Claims (2)

1. Filtration-absorbing gas mask box containing two connected between each other, cylindrical bodies, one of which is equipped with an anti-aerosol filter, and the other one contains a mixture between restrictive grids and an annular sealing gasket, which is different. that, in order to improve performance by reducing aerodynamic drag while maintaining the duration of the protective action of the box, the anti-aerosol filter and the restrictive mesh of the charge body facing it are set at 2.5-5.2% of the height of the charge, 2. A box according to claim 1, in which case in order to improve the tightness, the case for installing the charge is made with an outer annular protrusion, and the case for installing an anti-aerosol filter has an annular step covering the protrusion housings for installation, and an end edge contacting the same protrusion from the side opposite to the aerosol filter, and a sealing gasket is installed between the protrusion and the ledge of the housing from the anti-aerosol filter. eight FIG. 2