RU218758U1 - Valve box of the face part of the helmet-mask type - Google Patents

Abstract

The utility model relates to respiratory protection devices used as an integral part of the front part of a helmet-mask in personal respiratory protection equipment required when working in industrial enterprises, hazardous industries, providing protection of the respiratory organs, eyesight and skin of the face and head from harmful and hazardous substances - gases, dust and aerosols. The valve box of the front part of the helmet-mask consists of a housing into which a dividing partition with two protruding oval bosses is inserted, with one inhalation valve, one exhalation valve, an upper half-cage and a lower half-cage, equipped with a protective screen that protects the exhalation valve from external influences, and the plane the inhalation valve and the plane of the exhalation valve are located on the body at an angle of 90±15°. The technical result is to reduce the resistance to breathing during exhalation. 1 z.p. f-ly, 1 ill.

Description

1. Field of technology.

This utility model relates to respiratory protection devices used as an integral part of the front part of a helmet-mask in personal respiratory protection equipment necessary when working in industrial enterprises, hazardous industries, providing protection of the respiratory organs, eyesight and skin of the face and head from harmful and hazardous substances - gases, dust and aerosols.

2. State of the art.

In Russian legislation, the requirements for the valve box of the front part of the helmet-mask are regulated by GOST 12.4.166-2018 “Occupational safety standards system. Personal respiratory protection. Helmet masks. General technical conditions".

The valve box is used as an integral part of the front part of the helmet-mask in personal respiratory protection equipment. The valve box is designed to distribute air flows during inhalation and exhalation in the space under the mask, providing the discharge of exhaled air into the atmosphere. The design features of the valve box as part of the front part of the helmet-mask type must provide the following requirements:

1. Valves should be designed to be easy to handle and maintain, and to be replaced correctly if required by the operating instructions.

2. The design of the valves should exclude the operation of the exhalation valves in the inhalation cycle and the inhalation valves in the exhalation cycle.

3. The inspiratory valves must function correctly in all helmet positions.

As an example of the embodiment of a valve box as part of the front part of a helmet mask, one can cite the valve box used in helmet masks ShMP-1 (GOST 12.4.166-2018) and ShM-2012 (GOST 12.4.166-2018), which is the closest analogue of this utility model.

The valve box of helmet-masks ShMP-1, ShM-2012 is a one-piece cylindrical body with a protruding neck having a connecting thread. The one-piece body has two oval bosses that serve to mount the fairings of the elastic body of the helmet-mask. Inside the valve box there are two exhalation valves (internal and external) and an inhalation valve. The inhalation valve and exhalation valves are separated by an internal baffle, which ensures the separation of air flows during inhalation and exhalation. The plane of the inhalation valve and the plane of the exhalation valves are located on the body at an angle of 10±15°. A gasket is installed inside the neck, which serves to ensure a tight connection to a source of clean air. The valve box is made of metal. The number of components of the valve box is 12, the number of assembly operations required to assemble the valve box is 10.

The disadvantage of the above analogue is the high resistance to breathing during exhalation due to the small size of the chamber formed by the internal and external exhalation valve.

The technical problem is to create a valve box that provides low breathing resistance during exhalation.

The technical result achieved in the utility model is to create a valve box of the front part of the helmet-mask type used to connect a source of clean air, capable of reducing breathing resistance during exhalation, protecting the exhalation valve from external influences and pollution, which has a high manufacturability.

3. Disclosure of the essence of the utility model.

The essence of the utility model is to achieve the mentioned technical result by creating a valve box of the front part of the helmet-mask type used to connect a source of clean air (hereinafter referred to as the device), providing low breathing resistance during exhalation, protection of the exhalation valve from external influences, having high manufacturability.

To achieve the specified technical result, a utility model used in the front part of the helmet-mask type includes a body, one inhalation valve, one exhalation valve, a dividing wall with two protruding oval bosses used to attach the fairings of the elastic body of the helmet-mask, a protective screen , the upper half-cage and the lower half-cage.

In this case, in the utility model:

- low breathing resistance during exhalation is ensured due to the location of the plane of the inhalation valve and the plane of the exhalation valve on the body at an angle of 90 ± 15° and the use of an exhalation valve having an increased diameter;

- the protection of the exhalation valve from external influences and the creation of the necessary coefficient of suction under the front part is provided by a protective screen.

Due to this arrangement of valves, it is possible to use a single exhalation valve, providing low breathing resistance during exhalation.

4. Brief description of the drawings.

In FIG. 1 shows a utility model in section, where

1 - exhalation valve;

2 - inhalation valves;

3 - axis;

4 - rubber gasket;

5 - partition;

6 - upper half-cage;

7 - lower half-ring;

8 - protective screen;

9 - body.

The proposed utility model (Fig. 1) contains a body (9) of a cylindrical shape, an exhalation valve (1) and an inhalation valve (2) with an axis (3), a rubber gasket (4), a partition (5) with two protruding oval bosses, inserted into fairings molded on the inner surface of the front part of the helmet-mask, a protective screen (8), an upper half-ring (6) and a lower half-ring (7).

5. Implementation of the utility model.

The utility model is a cylindrical body (9) with a protruding threaded saddle for connecting a source of clean air.

The rubber gasket (4) is designed to ensure tight connection of filtering or insulating elements to the front part of the helmet-mask type.

A partition (5) with two protruding oval bosses is inserted from the inside of the body (9).

The partition (5) with two protruding oval bosses is designed to separate air flows during inhalation and exhalation.

The lugs are designed to connect with the channels of the elastic body of the helmet-mask and directing the inhaled air into the fairings of the elastic body of the helmet-mask.

The inhalation valve (2) is designed to direct the purified filtered air under the helmet-mask, and then into the respiratory organs.

The exhalation valve (1) is designed to release exhaled air from under the helmet mask. The plane of the inhalation valve (2) and the plane of the exhalation valve (1) are located on the body at an angle of 90±15°.

The upper half-shell (6) and the lower half-shell (7) are designed to fix the device on the elastic body of the front part of the helmet-mask by placing the elastic body of the front part of the helmet-mask into the gap of the device body.

The protective screen (8) is designed to protect the exhalation valve from contamination and create the required suction coefficient under the front part.

The operation of the device is as follows: When inhaling, air passes through the inhalation valve (2), enters the chamber formed by the body (9) and the partition (5), where the air flow is divided and enters the fairings of the elastic body of the helmet-mask. Through the fairings, air enters the glasses of the helmet-mask and into the user's respiratory organs.

When exhaling, the air is directed to the exhalation valve (1) through the partition (5) without mixing with the inhaled air. An exhalation valve (1) with an enlarged diameter was used. Having passed the exhalation valve (1), the exhaled air enters the gap between the body and the protective screen (8), and then it is discharged into the atmosphere.

The number of components of the utility model is 7. The number of assembly operations required to assemble the utility model is 5. The utility model is made of a polymeric material.

Thus, the entire set of essential features that characterize the claimed utility model is aimed at achieving the indicated advantage of the proposed utility model.

Table 1 shows the test indicators in accordance with the requirements of GOST 12.4.166-2018 when using the proposed utility model, as well as its closest analogue.

Table 1

Index Valve box ShM-2012, ShMP-1 utility model Exhalation resistance at a volume flow of 2500 cm ³ ⋅s ^-1 (150 dm ³ ⋅min ^-1 ), Pa (mm water column), no more 455.0 152.0 Exhalation resistance at a volume flow rate of 500 cm ³ ⋅s ^-1 (30 dm ³ ⋅min ^-1 ), Pa (mm water column), no more 127.0 43.0

The tests of the proposed utility model carried out by the developers allow us to say that a valve box of the front part of the helmet-mask type has been created, which is used to connect a source of clean air and separate air flows during inhalation and exhalation and ensure the discharge of exhaled air into the atmosphere, provides low breathing resistance during exhalation, protection exhalation valve from contamination, improves manufacturability due to fewer parts and fewer assembly steps.

Claims (2)

1. The valve box of the front part of the helmet-mask, characterized in that it consists of a body into which a dividing partition is inserted with two protruding oval bosses, with one inhalation valve, one exhalation valve, an upper half-cage and a lower half-cage, characterized in that it is equipped with a protective a screen that protects the exhalation valve from external influences, and the plane of the inhalation valve and the plane of the exhalation valve are located on the body at an angle of 90±15°. 2. Valve box according to claim 1, characterized in that it is made of a polymeric material.

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