RU2834065C1 - Adapter for connection of front part shm-62 of all-arms filtering gas mask pmg-2 with external threaded attachment of filter - Google Patents

Abstract

FIELD: breathing masks or helmets.

SUBSTANCE: present invention relates to gas mask equipment, to parts of gas masks. Adapter for connecting the front part “ШМ-62” of all-arms filtering gas mask “ПМГ-2” with an external threaded attachment of the filter comprises an adapter housing made in the form of a one-piece part, having height of 31.5 mm, an outer diameter on the connection side of the external threaded attachment of filter is 47.5 mm, comprising a vertical through channel without valves, a collar having an outer diameter of 73.5 mm and height of 3 mm, connecting part, having external diameter – 66.5 mm, height – 16 mm and thickness – 4 mm, and an internal threaded connection, on the outer side of which there are finger stops and in which an internal thread is made with a nominal thread diameter of 40 mm, a thread pitch of 4 mm, a thread rounding radius of 1.25 mm, the smallest inner diameter of 38.41 mm, the largest inner thread inner diameter – 38.06 mm, smallest outer diameter – 40.06 mm, intended for connection with external threaded fastener of filter having external thread corresponding to internal thread of internal threaded connection of adapter housing, and a gasket of annular solid shape, rectangular vertical section, having an inner diameter of 27 mm, an outer diameter of 40 mm and thickness of 2 mm.

EFFECT: providing a safe and tight connection between the front part of the gas mask with an external threaded attachment of the filter, having an external threaded attachment with a thread diameter of 40 mm and thread parameters corresponding to the requirements of GOST 8762-75.

1 cl, 5 dwg

Description

1. Field of technology to which the invention relates

The present invention relates to gas mask equipment and to gas mask parts.

The Sushchenko-Bolyasov adapter (hereinafter referred to as the adapter) connects the front part of the gas mask and the external threaded filter mount, includes:

the adapter body, which contains: an internal threaded connection, a vertical passage channel, a flange and a connecting part;

a gasket that is installed on the gasket pad.

Technical result The claimed invention is to provide a safe and hermetic connection between the face of the gas mask with an external threaded filter mount, which has an external threaded mount with a thread diameter of 40 mm and thread parameters that meet the requirements of GOST 8762-75 [GOST 8762-75. Interstate standard. Round thread with a diameter of 40 mm for gas masks and gauges for it. Main dimensions].

2. State of the art

The prior art includes patent for invention RU 2753293 (Registration date: 12.08.2021, authors: Kulik A.Yu., Ovchinnikov S.G., Repin V.S.). This patent for invention describes an anti-aerosol gas mask (respirator) with additional purification of exhaled air. The gas mask (respirator) consists of a mask, a filter installed on the inhalation line and a filter installed on the exhalation line, with the inhalation and exhalation filters combined into one filter.

The disadvantages of this technical solution include:

complication of the design of the inhalation-exhalation unit due to the fact that a heat and moisture exchanger is installed in front of the combined filter;

in case of using the KAMPO MPA-1 respirator, which implements the claimed technical solution under patent RU 2753293, there is an increased probability of infection of an infected person who is wearing the MPA-1 respirator by airborne droplets through the eyes with other aerosol infections (viruses and bacteria), therefore, when using respirators, it is always necessary to use special protective glasses.

The closest analogue (prototype) of the claimed invention should be considered the standard valve box of the general-purpose filter gas mask PMG-2, which is part of the face part (ShM-62 or ShM-66Mu).

In pandemic conditions (conditions of viral or bacterial infection with various infections), when potential infection by airborne droplets from an infected serviceman (who uses the general-purpose filter gas mask PMG-2) to servicemen who are nearby without personal respiratory protective equipment (hereinafter referred to as RPE) is possible, the disadvantage of the standard valve box of the general-purpose filter gas mask PMG-2 will be the presence of an opening with two rubber exhalation valves, through which it is potentially possible to infect servicemen and other persons nearby without RPE with viruses and bacteria.

3. Disclosure of the essence of the invention

To date, special RPE in the form of half masks, respirators and full-face masks have been developed, which solve the problem of providing high anti-aerosol protection not only for the user, but also protecting people around from biological aerosols emitted by the RPE user (patents RU 2753293, US 6584976 B2).

However, for a number of reasons, such RPE cannot be used by military personnel when performing combat and special tasks.

Therefore, at present, it is extremely important to develop a device for the safe use of a filter gas mask, mass-produced for the needs of the Russian Ministry of Defense, the Russian Ministry of Internal Affairs, the Russian National Guard and other law enforcement agencies, in conditions of viral and bacterial contamination, as well as in conditions of uncertainty, when it is not clear whether the user of the filter gas mask is a source of contamination with viruses and bacteria or not.

Such situations may arise during a mass epidemic of various viral infections (a striking example is the COVID-19 pandemic), including those developed in special biological laboratories. In such conditions, reliable protection of the respiratory system from viruses and bacteria is necessary, both during inhalation and exhalation (if there are people nearby without RPE).

In order to solve this problem, the claimed invention proposes to use an adapter in the general-purpose filter gas mask PMG-2 instead of the standard valve box, connecting the face of the gas mask and the external threaded filter mount. It is advisable to use an anti-aerosol filter as a filter, for example, the FSU-MB from the anti-plague kit "QUARTZ-1M" [https://docs.nevacert.ru/files/med_reestr_v2/o8548_scan.pdf (Accessed: 25.06.2024)].

The essence of the invention is that in the proposed adapter connecting the face part of the gas mask and the external threaded fastening of the filter, it is proposed to combine one opening containing one rubber inhalation valve and one opening containing two rubber exhalation valves (implemented in the standard valve box of the general-purpose filter gas mask PMG-2) into one inhalation-exhalation opening (the vertical passage channel (6) of the proposed adapter), without using rubber valves in such a way that air filtration is carried out both on inhalation and on exhalation through one filter.

The general-purpose filter gas mask PMG-2 was chosen as the PPE, which was accepted for supply to the Federal Service of the National Guard Troops of the Russian Federation and is still the most widely used gas mask compared to more modern analogues such as PMK-3 and PMK-S.

The general-purpose filter gas mask PMG-2 is designed to protect the respiratory system, face and eyes from toxic substances, radioactive dust and bacterial (biological) agents [https://xn--j1ahfl.xn--p1ai/presentation/28000.html (Accessed: 25.06.2024)].

The objective of the present invention is to develop an adapter for the safe use of a general-purpose filter gas mask, both for the servicemen (employees) of the Russian Guard themselves and for the surrounding persons who are nearby without respiratory protection, relative to the user of the general-purpose filter gas mask (a serviceman or employee of the Russian Guard), who can potentially be a source of infection with various viruses and bacteria transmitted by airborne droplets.

Technical result The claimed invention is to provide a safe and hermetic connection between the face part of a gas mask with an external threaded filter mount, which has an external threaded mount with a thread diameter of 40 mm and thread parameters that meet the requirements of GOST 8762-75.

The adapter connecting the front part of the gas mask and the external threaded filter mount consists of an adapter body (1) and a gasket (2) (Fig. 1, 2).

The adapter body (1) is made from materials based on industrial plastics such as polyethylene terephthalate glycol, high-density polyethylene, polypropylene, Xenoy® resins and/or combinations thereof.

The adapter body (1) has the following dimensions (Fig. 1-3):

height – 31.5 mm;

the outer diameter on the connection side of the external threaded filter mount with a thread diameter of 40 mm and thread parameters that meet the requirements of GOST 8762-75 – 47.5 mm;

outer diameter of the rim (3) – 73.5 mm, height of the rim (3) – 3 mm;

the outer diameter of the connecting part (4) is 66.5 mm, the height of the connecting part (4) is 16 mm; the thickness of the connecting part (4) is 4 mm.

The adapter body (1) is a non-detachable part, which includes (Fig. 1, 2):

internal threaded connection (5) that meets the requirements of GOST 8762-75: nominal thread diameter – 40 mm, thread pitch – 4 mm, thread rounding radius – 1.25 mm, smallest internal diameter – 38.41 mm, largest internal diameter – 38.06 mm, smallest external diameter – 40.06 mm;

vertical passage channel (6) with a diameter of 26 mm, it is designed to move air that has passed through the filter to the front part of the filter gas mask and back;

a flange (3), which is designed to secure the adapter using a standard clamping ring (10) to the front part of the gas mask;

connecting part (4), which is inserted into the face part of the gas mask and then secured to the face part using the standard pressure ring (10) (Fig. 5).

On the outside of the internal threaded connection (5) there are 6 finger stops (7), which are designed to conveniently fix the adapter body (1) in the hand when installing it in the front part of the gas mask (Fig. 1).

The gasket (2) has a ring-shaped, solid shape, a rectangle in vertical section, internal diameter – 27 mm, external diameter – 40 mm, thickness – 2 mm.

The gasket is made of materials that meet the established requirements [GOST 481-80. Paronite and gaskets made of it. Specifications and GOST 7338-77. Rubber and rubber-fabric plates. Specifications], including established rubber standards or thermosetting silicone materials ELASTOSIL LR 3070 from Wacker-Silicones (Munich, Germany); series KE2095 or KE2009 (such as, for example, KE2095-60, KE2095-50, KE2095-40) or X-34-1547A/B, X-34-1625A/B, X-34-1625A/B.

The gasket (2) is installed in the gasket pad (8) without using glue or other chemical components (Fig. 1-2).

The procedure for installing the adapter connecting the face of the gas mask and the external threaded filter mount in the face part of the ШМ-62 (9) of the general-purpose filter gas mask ПМГ-2 (Fig. 5):

1. Using a screwdriver and pliers, bend back the standard clamping ring (10) of the general-purpose filter gas mask PMG-2 and remove it, then remove the fabric insulating tape (11) and the fixing metal wire located underneath, and then remove the standard valve box of the general-purpose filter gas mask PMG-2.

2. Take the adapter connecting the face part of the gas mask and the external threaded filter mount by the finger rests (7) and insert the connecting part (4) into the opening of the face part ШМ-62 (9) of the general-purpose filter gas mask ПМГ-2 (into the opening intended for mounting the standard valve box), so that the face part ШМ-62 (9) of the general-purpose filter gas mask ПМГ-2 rests against the side (3).

3. Take the fabric insulating tape (11) and screw it clockwise from the outside of the hole (2 layers of fabric insulating tape) intended for mounting the standard valve box of the face part of the ШМ-62 (9) of the general-purpose filter gas mask ПМГ-2.

4. Take the pressure ring (10) in your hands, insert it from the outside of the hole for mounting the standard valve box of the face part of the ШМ-62 (9) of the general-purpose filter gas mask ПМГ-2 so that the teeth of the pressure ring are at the level of the wound fabric insulating tape, using pliers and a screwdriver, press the metal teeth of the pressure ring (10) until they stop.

For provision safe use of the general-purpose filter gas mask PMG-2, both for the servicemen (employees) of the Russian Guard themselves, and for the surrounding persons who are nearby without RPE, with respect to the user of the general-purpose filter gas mask PMG-2 (a serviceman or an employee of the Russian Guard), who may be a source of infection with various viruses and bacteria transmitted by airborne droplets, it is necessary to screw clockwise until it stops into the face part ШМ-62 (9) of the general-purpose filter gas mask PMG-2 (with an installed adapter) a filter having an external threaded mount with a thread diameter of 40 mm and thread parameters that meet the requirements of GOST 8762-75 (with aerosol filtration class P3) (Fig. 5).

4. Brief description of drawings and other graphic materials

Fig. 1. General view of the adapter connecting the front part of the gas mask and the external threaded filter mount.

In Fig. 1 the following designations are used:

1 – adapter body;

2 – gasket;

3 – side;

4 – connecting part;

5 – internal threaded connection;

6 – vertical passage channel;

7 – finger rests (6 pieces in total);

8 – laying area.

Fig. 2. Axonometric vertical section of the adapter connecting the face of the gas mask and the external threaded filter mount.

In Fig.2 the following designations are used:

1 – adapter body;

2 – gasket;

3 – side;

4 – connecting part;

5 – internal threaded connection;

8 – laying area.

Fig. 3 General view from below of the adapter connecting the front part of the gas mask and the external threaded filter mount.

In Fig. 3 the following designations are used:

2 – gasket;

3 – side;

4 – connecting part;

6 – vertical passage channel.

Fig. 4. Image of a mock-up of an adapter connecting the face of the gas mask and the external threaded mount of the filter, manufactured using 3D printing.

In Fig.4 the following designations are used:

1 – adapter body;

2 – gasket;

5 – internal threaded connection;

6 – vertical passage channel;

7 – finger rests (6 pieces in total).

Fig. 5. Image of a mock-up of an adapter connecting the face part of the gas mask and the external threaded mount of the filter, manufactured using 3D printing as part of the face part of the ШМ-62 general-purpose filter gas mask PMG-2 and the connected anti-aerosol filter FSU-MB.

In Fig.5 the following designations are used:

9 – face part of the ШМ-62 general-purpose filter gas mask ПМГ-2;

10 – pressure ring;

11 – fabric insulating tape;

12 – a model of the adapter connecting the front part of the gas mask and the external threaded mount of the filter, made using 3D printing;

13 – anti-aerosol filter FSU-MB.

5. Implementation of the invention

In the implementation of the invention, a general-purpose filter gas mask PMG-2 with a face part SHM-62 (9) was used as a gas mask.

The adapter body (1) was made using a 3D printer, using PETG plastic as the printing material. The gasket (2) was made of rubber, manually cut with a caliper (Fig. 4).

The original valve box was removed from the face part of the ШМ-62 (9) of the general-purpose filter gas mask PMG-2, and a developed adapter model (12) was installed in its place (Fig. 5).

FSU-MB filters (13) from the anti-plague kit "QUARTZ-1M" were used as high-efficiency anti-aerosol filters of class P3. These filters are accepted for supply to the troops of the National Guard of the Russian Federation and, in addition, are reusable filters subject to sterilization (at least 10 cycles) [https://protivogaz.ru/product/filtr_spetsialnyy_fsu_mb/(Accessed: 25.06.2024)] (Fig. 5).

The tightness test of the developed adapter mock-up (12) connecting the face part of the gas mask and the external threaded filter mount, as well as the tightness of the fastening of the adapter mock-up (12) with the face part of the ШМ-62 (9) of the general-purpose filter gas mask PMG-2 with the standard filter-absorbing box EO-62K were conducted in a tent for testing gas masks according to the standard method for testing filter gas masks for the troops of the National Guard of the Russian Federation.

To check for leaks, chlorobenzalmalonodinitrile (CS) aerosol was used as a test substance. During the tests, no CS was sucked into the respiratory organs and eyes. A conclusion was made about the leaks of the developed adapter mock-up (12), as well as the leaks of the adapter mock-up (12) fastening with the face part of the ШМ-62 (9) of the general-purpose filter gas mask PMG-2.

Claims (3)

An adapter for connecting the face part of the ШМ-62 general-purpose filter gas mask ПМГ-2 with an external threaded filter mount, containing: an adapter body made in the form of a non-detachable part, having a height of 31.5 mm, an external diameter on the side of the connection of the external threaded filter mount of 47.5 mm, containing a vertical passage channel without valves, a flange having an external diameter of 73.5 mm and a height of 3 mm, a connecting part having an external diameter of 66.5 mm, a height of 16 mm and a thickness of 4 mm, and an internal threaded connection, on the outer side of which finger stops are made and in which an internal thread is made with a nominal thread diameter of 40 mm, a thread pitch of 4 mm, a thread rounding radius of 1.25 mm, a smallest internal diameter of 38.41 mm, a largest internal diameter of 38.06 mm, a smallest external diameter of 40.06 mm, intended for connection to the external threaded filter mount, which has an external thread corresponding to the internal thread of the internal threaded connection of the body adapter, and a gasket made in a ring-shaped, solid form, with a rectangular vertical cross-section, an internal diameter of 27 mm, an external diameter of 40 mm and a thickness of 2 mm.