RU148461U1 - MEANS OF INDIVIDUAL PROTECTION OF HUMAN RESPIRATORY BODIES - Google Patents

Abstract

Individual respiratory protective equipment for a person containing a nasal cavity obturator made of a gas-tight elastic material on which inspiration and expiration valve bodies are fixed and means for attaching filter-absorbing elements, a hood made in the form of a bag made of at least transparent eyes. non-combustible, gas-tight film having openings matching the openings in the obturator, tightly worn on the neck of the filter and the body of the inspiratory and expiratory valves, the headband providing a different fit of the obturator of the nasal cavity to the person’s face, and containing an elastic band located inside the hood, each end of which is attached to one of the upper edges of the inelastic insert, which are connected to the top of the back of the hood, the lower end of the inelastic insert is attached to the hood at the neck level, and the second an elastic band providing tension of the obturator in the direction from the mouth area below the area of the ears to the neck, is located outside the hood, characterized in that the obturator of the nasal cavity is placed in Each frame is made in the form of an obturator of the nasal cavity with holes for attaching valves and a filter matching the holes in the obturator, while the hood is attached to the frame using gaskets.

Description

The utility model relates to personal respiratory protection (PPE) of a person and is intended for use in a polluted environment with harmful aerosols, vapors, gases.

Known personal protective equipment for human respiratory organs, containing a half mask of gas-tight elastic material and a hood made in the form of a bag of non-combustible, gas-tight material (RU 2240160 C1, A62B 18/04, 2004, RU 2214295 C1, A62B 7/10, 2003 RU 65385 U1, A62B 15/00, 2007, RU 124159 U1, A62B 18/00, 2013).

The closest in technical essence is the human RPM, containing the obturator of the nasal cavity of a gas-tight elastic material, on which the valve body of the inhale and exhale and means for attaching the filter-absorbing elements are fixed, the hood, made in the form of a bag of transparent, at least in the region eye, non-combustible, gas-tight film having holes for attachment to the obturator of the nasal cavity, tightly worn on the valve body of the inspiration and exhalation, headband, providing tight e fit shutter rotonosovoy cavity to the human person (RU 124159 U1, A62B 18/00, 2013).

The disadvantage of the prototype is the high pressure on the soft tissues of the face along the obturation line, due to the hardness of the material of the obturator of the nasal cavity (more than 60 conventional units according to Shore A), which is necessary to ensure reliable fastening of valves and fastening means of filter-absorbing elements on the obturator.

A solid obturator of the nasal cavity during abrupt movements of the head can shift from the optimal position of the obturation line, which will lead to depressurization and an increase in the leakage of toxic substances into the breathing zone.

The attachment of filtering and absorbing elements (filters) directly to the nasal obturator requires limiting the mass of attached filters (not more than 200 g), which necessitates the use of at least two filters in the product.

The technical result from the use of RPD is to increase the reliability of protection against toxic substances.

The problem is achieved due to the following set of essential features: a personal respiratory protective device containing a nasal cavity obturator made of a gas-tight elastic material, on which inspiration and expiration valve bodies are fixed and means for attaching filter-absorbing elements, a hood made in the form of a bag of transparent, at least in the eye area, a non-combustible, gas-tight film having openings matching the openings in the shutter, hermetically sealed placed on the neck of the filter and the valve body of the inhalation and exhalation, a headband providing a snug fit of the obturator of the nasal cavity to the person’s face, a headband containing an elastic braid located inside the hood, each end of which is attached to one of the upper edges of the inelastic insert that are connected to the top of the back the hood, the lower end of the inelastic insert is attached to the hood at neck level, and the second elastic band, which provides an obturator tension in the direction from the mouth area below the ears to the neck, is located wife outside the hood, characterized in that the obturator is placed in the cavity rotonosovoy solid frame made in form obturator rotonosovoy cavity with holes for fixing the valve and the filter, coinciding with the openings in the obturator and the hood is attached to the frame using gaskets.

Private essential features are:

- a frame made of polymer material with a hardness of 80-90 conventional units according to shore A;

- obturator of the nasal cavity from a polymeric material with a hardness of 25-40 conventional units according to Shore A;

- one filter weighing up to 500 g;

- the filter is mounted on the inside of the obturator with a nut on the filter neck;

- the inspiration valve is located on the nut for attaching the filter;

- two exhalation valves;

- the distance from the edge of the frame to the line of contact of the shutter to the face of 1.5-2.0 cm

The essence of the utility model is illustrated by drawings, which show:

in FIG. 1 - a General view of the device, with the layout of the frame on an elastic shutter,

in FIG. 2 is a diagram of a filter mounting on a shutter with a frame.

The hood 1 is made in the form of a bag of a transparent, non-combustible, gas-tight, durable polymer film.

The hood 1 has an obturator 3 of the nasal cavity, fixed in the frame and performs the following functions: provides isolation of the respiratory system (mouth and nose) of a person from the external environment; provides air to the respiratory system through the filter 4; the frame is a supporting element on which other parts of the self-rescuer are fixed: a hood with an internal and external headband, exhalation valves, and a filter.

There are three holes in the front of the shutter. A filter 4 with an inspiratory valve is mounted in the middle hole. In two side openings 15, exhalation valves 5 are attached with valve pads 6.

At the level of the side holes on the outside, one loops 11 with buckles 12 are fastened to the case, into which the ends of the outer braid of the headband are inserted 8. The buckles 12 allow you to manually adjust the length of the braid.

The ends of the inner braid 10 are attached to similar loops 13 on the inside. A guide insert 9 of inelastic material is attached to the rear part inside the hood 1, which is fastened only in the upper and lower parts of the hood, while the lower part of the insert itself may be narrower.

That part of the inner braid 10, which should be on the crown after donning, is sewn to the insert, closer to its top. Here, the width of the insert should be such that the side parts of the braid are spaced apart to a distance that allows the head to pass when donning. It is in this case that it turns out that the insert 9 and the inner braid 10 are snug against the head, and the back of the body moves away a certain distance.

Thus, a kind of inner cap is obtained, where the head is inserted when putting on, and the hood is not adjacent to the head, since it is attached to this cap only at the upper corners of the insert and with its lower part. As a result, an air layer is formed, which provides improved protection against thermal factors.

The hood is fastened to the frame with the shutter at the locations of the three holes on the hood body at the points of attachment of the filter and exhalation valves. The tightness of the joints is ensured by clamping the polymer film of the hood between the two gaskets of porous rubber 14.

The lower part of the hood is equipped with a cervical obturator 7, which provides a tight fit of the hood to the neck of a person in order to prevent the passage of untreated air under the hood during breathing.

The inspiratory valve 16 is designed to prevent the intake of exhaled air by a person into the filter.

The exhalation valves are designed to release air exhaled by a person into the atmosphere at the time of exhalation and to prevent the entry of untreated air into the mouth and nose at the time of inhalation.

Valve bodies are made of hard plastic, valve membranes are made of elastic polymer material.

The filter is made in the form of, for example, a round box of polymer material. The filter contains anti-aerosol material for cleaning inhaled air from solid and liquid aerosols and a combined charge for absorbing vapors and gases. Depending on the purpose of the protective device, by changing the composition of the charge, universal self-rescuers can be created that provide comprehensive protection against carbon monoxide, organic, inorganic acidic, inorganic basic substances, and special self-rescuers to protect against specific dangerous chemicals or certain groups of substances.

Thus, this tool is convenient to use, storage, provides increased protective properties, as well as improving the usability of people with different sizes of face and head.

Claims (1)

Individual respiratory protective equipment for a person containing a nasal cavity obturator made of a gas-tight elastic material on which inspiration and expiration valve bodies are fixed and means for attaching filter-absorbing elements, a hood made in the form of a bag made of at least transparent eyes. non-combustible, gas-tight film having openings matching the openings in the obturator, tightly worn on the neck of the filter and the body of the inspiratory and expiratory valves, the headband providing a different fit of the obturator of the nasal cavity to the person’s face, and containing an elastic band located inside the hood, each end of which is attached to one of the upper edges of the inelastic insert, which are connected to the top of the back of the hood, the lower end of the inelastic insert is attached to the hood at the neck level, and the second an elastic band providing tension of the obturator in the direction from the mouth area below the area of the ears to the neck, is located outside the hood, characterized in that the obturator of the nasal cavity is placed in Each frame is made in the form of an obturator of the nasal cavity with holes for attaching valves and a filter matching the holes in the obturator, while the hood is attached to the frame using gaskets.

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