RU226206U1 - RUBBER CORRUGATED TUBE - Google Patents

Abstract

The utility model relates to gas mask equipment, parts of gas masks, full-face masks and half-masks. The rubber corrugated tube connecting the external bayonet fastening of the front part of the filter of personal respiratory protection with the external threaded fastening of the filter contains a rubber corrugated hose, to which an angular bayonet adapter is connected using glue and metal clamps from the upper connecting part, and a slip-on adapter from the lower connecting part a nut with a nipple ring and the nipple itself, wherein the corner bayonet adapter contains a bayonet connection made in the form of a circle, inside of which there is a hole for a bayonet fastening of the front part of the filtering personal respiratory protection device, and the bayonet fastening is made in the form of a circle with a diameter of 25 mm with three trapezoidal protrusions, two of which have a larger base equal to 12 mm, the third has a larger base equal to 8 mm, while the trapezoidal protrusions are located at an angle of 120° relative to each other, and inside the bayonet connection there are 3 bayonet fastening travel stops. The technical result is to provide a safe and tight connection between the front part of the personal respiratory protection filter, which has external bayonet fastenings of the MSA, UNIX standard and their analogues, with an external threaded fastening of a filter having an external thread with a diameter of 40 mm. 1 salary f-ly, 9 ill.

Description

Field of technology to which the utility model relates

This utility model relates to gas mask equipment, parts of gas masks, full-face masks and half-masks.

A rubber corrugated tube connecting the external bayonet mount of the UNIX standard, MSA and their analogues of the front part of the filter of personal respiratory protection equipment (hereinafter referred to as RPE) with the external threaded fastening of the filter (hereinafter referred to as the rubber corrugated tube) includes a rubber corrugated hose from the upper connecting part which is connected to an angular bayonet adapter designed for connection to the external bayonet mount of the UNIX, MSA and their analogues of the front part of the filtering RPE, and on the lower side of the connecting part of the rubber corrugated hose is connected a union nut with a nipple ring and the nipple itself for connection to a threaded filter having an external threaded fastener 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 calibers for it. Basic dimensions].

The technical result is to provide a safe and hermetically sealed connection between the front part of a filtering RPE having external bayonet fastenings of the MSA, UNIX standard and their analogues with an external threaded fastening of a filter having an external thread with a diameter of 40 mm.

State of the art

A connecting tube is known from the prior art [GOST 12.4.166-85. System of occupational safety standards. Front part of ShMP for industrial gas masks. Specifications]. The upper end of the connecting tube is used for connection to the front part and consists of a threaded clamp tightly connected to the inhalation pipe. The lower end of the connecting tube consists of a union nut, tightly connected to a nipple ring for connection to the filter. The tube is made of rubber, the connecting parts of the tube are made of metal.

The disadvantages of the selected analogue are that this connecting tube can only be used for connection to the front parts of filtering RPE having an internal threaded connection that meets the requirements of GOST 8762-75.

A connecting tube with an angular fitting is known from the prior art [https://arti-zavod.ru/upload/iblock/660/6600cbf59f7b8f7ab6e25026b94 a3200.pdf (access date: 12/15/2023)], which is the closest analogue of this utility model.

This connecting tube with an angular fitting provides a sealed connection between the front part of the PMK-S gas mask and the FPK-7PB filter and absorption box (FPK-7PM, “IZOD” filter brand B ₁ E ₁ K ₂ NOCO ₃₅ SXP ₃ RD).

The corner fitting is made of plastic and includes a rotating pressure ring, which allows you to adjust the angle of rotation of the hose relative to the front part of the PMK-S gas mask. The corner fitting is connected to the rubber corrugated hose using glue and a metal clamp.

The disadvantages of the selected analogue are that this connecting tube with an angular fitting can only be used for connection to the front parts of filtering RPE having an internal threaded connection that meets the requirements of GOST 8762-75.

Disclosure of the essence of the utility model

The technical problem solved by the creation of a utility model is the possibility of using filters that have an external threaded fastening with a thread diameter of 40 mm and thread parameters that meet the requirements of GOST 8762-75 with the front parts of filtering RPEs that have external bayonet fastenings of the MSA, UNIX standard and their analogues due to connecting them through a developed rubber corrugated tube.

The practical meaning of this use of filters that have an external threaded fastening with a thread diameter of 40 mm with the front parts of filtering RPEs that have external bayonet fastenings of the MSA, UNIX standard and their analogues is that native bayonet filters of the MSA, UNIX standard and their analogues have a small sorption capacity , which is a serious drawback when carrying out degassing, disinfection, disinfestation and other work that requires full respiratory protection. As practice shows, usually such bayonet filters are enough for one time, when carrying out, for example, disinfestation with standard means.

The use of the developed rubber corrugated tube will allow the use of threaded filters with a large protective sorption capacity, including protection class 3 (Fig. 1), which will significantly increase the protective action time of such filters compared to bayonet filters of the MSA, UNIX standard and their analogues .

In addition, threaded filters of protection class 3 provide protection from a larger list of harmful substances compared to bayonet filters, so filters of protection class 3 will have the highest degree of protection with the presence of the largest number of classes of substances in the filter marking: A, AX, B, E, K , P, CO, SX, NO, Hg.

The technical result is to provide a safe and hermetically sealed connection between the front part of a filtering RPE having external bayonet fastenings of the MSA, UNIX standard and their analogues with an external threaded fastening of a filter having an external thread with a diameter of 40 mm.

The conventionally designed rubber corrugated tube can be divided into 3 main parts:

1. Rubber corrugated hose.

2. Angled bayonet adapter.

3. Union nut with nipple ring and nipple itself.

The rubber corrugated hose has the following main dimensions (Fig. 2): length - 550 mm, hose corrugation height - 34 mm, hose corrugation width - 36 mm.

The rubber corrugated hose has two identical connecting parts, the upper (item 1) and the bottom (item 2), which are connected to the transverse folds (corrugation) of the hose (item 3), the length of the connecting part is 30 mm, the outer diameter of the connecting part is 25 mm, internal diameter of the connecting part is 23 mm.

The rubber corrugated hose has transverse folds (corrugations) (item 3), which gives it the necessary elasticity and ensures the passage of air when bending.

Angled bayonet adapter (Fig. 2, Fig. 3-5, Fig. 9)

The corner bayonet adapter is made from materials based on industrial plastics, such as polyethylene terephthalate glycol, high density polyethylene, polypropylene.

The corner bayonet adapter can be manufactured using conventional or injection molding, as well as using 3D printing.

The corner bayonet adapter is a one-piece part consisting of:

a) the base, which is a hollow elliptical cylinder, inside of which there is an axial section of the cylinder in the form of a stiffener (item 10), which has the following dimensions: length - 36 mm, height - 15 mm, thickness - 3 mm. The lower part of the base of the corner bayonet adapter (item 7) is an ellipse, the length of the major axis of the ellipse is 30 mm, the length of the minor axis of the ellipse is 20 mm, the thickness of the walls of the side surface of the hollow elliptical cylinder is 2 mm.

b) a bayonet connection, made in the form of a circle, with an outer diameter of 44 mm (item 9), inside of which there is a hole for bayonet fastening to the front parts of filtering RPEs that have external bayonet fastenings of the MSA, UNIX standard and their analogues, is a circle with a diameter of 25 mm with three trapezoidal projections, two of which have a larger base of 12 mm (item 11), the third

- larger base 8 mm (item 12), arrangement of trapezoidal protrusions

- 120° relative to each other, with the smaller bases of the trapezoids of the three protrusions being on the outer side of the circle.

Inside the bayonet connection there are 3 travel stops for the bayonet fasteners (item 13), which are protrusions made in the form of rectangular trapezoids and have the height of trapezoids

- 8 mm, thickness - 3 mm, connected perpendicular to the plane of the bayonet connection. The location of the bayonet mount travel clamps is 120° relative to each other. The travel locks of the bayonet fastenings allow you to fix the corner bayonet adapter in the external bayonet fastening of the MSA, UNIX standard and their analogues of the front part of the filtering RPE in one position, so that the developed rubber corrugated tube extends strictly back, relative to the front part of the filtering RPE.

The bayonet connection of the corner bayonet adapter is connected to the base of the corner bayonet adapter using a surface that is an ellipse (item 8), the length of the major axis of the ellipse is 34 mm, the length of the minor axis of the ellipse is 30 mm.

The corner bayonet adapter has a length of 72 mm, a height of 33 mm, a width in the bayonet connection area of 44 mm, and a width of 30 mm in the base area.

The corner bayonet adapter is connected using glue and a metal clamp to the rubber corrugated hose (Fig. 2, Fig. 9 (item 5)).

The procedure for connecting to the rubber corrugated tube is as follows:

apply glue to the inner surface of the upper connecting part of the rubber corrugated hose, insert the corner bayonet adapter with its base into the inner surface of the rubber corrugated hose until it stops;

additionally secure using a metal clamp of the upper connecting part of the rubber corrugated hose and the corner bayonet adapter.

The corner bayonet adapter is both right-handed and left-handed at the same time, that is, it is suitable for connection with both the right and left external bayonet mount of the MSA, UNIX standard and their analogues of the front part of the filtering RPE.

Union nut with nipple ring and nipple itself (Fig. 2, Fig. 6).

The union nut (item 15) is made of metal and has a round internal thread that meets the requirements of GOST 8762-75:

nominal thread diameter - 40 mm;

thread pitch - 4 mm;

curvature radius - 1.25 mm;

smallest internal diameter - 38.41 mm;

largest internal diameter - 38.06 mm;

the smallest outer diameter is 40.06.

The height of the union nut is 20 mm; inside the union nut there is a hole with a diameter of 26 mm for connection with the nipple ring and the nipple itself. The connection diagram of the union nut with the nipple and nipple ring is shown in Fig. 6.

The nipple is made of metal (item 16), is a hollow cylinder, the height of which is 24 mm, the thickness of the side surface is 1 mm, the radius of the cylinder is 12 mm, at the end of the upper base of the cylinder there is a thickening in the form of a circle with a diameter of 25.2 mm (intended for fixing on the inner surface of the connecting part of the rubber corrugated hose). The lower base of the cylinder is perpendicularly connected to a ring having an internal diameter of 24 mm; outer diameter -33.5 mm; thickness - 0.5 mm, which is intended for connection with a rubber nipple ring by inserting it into the hole (pos. 18).

The rubber nipple ring (item 17) acts as a gasket between the external threaded connection of the filter and the nut of the rubber corrugated tube, and is intended for a tight connection between the filter and the rubber corrugated tube.

The rubber nipple ring has a height of 7 mm, an internal diameter of 26.5 mm, and an outer diameter of 36.5 mm. Inside the rubber nipple ring there is a hole made along the entire diameter of the inner circumference of the nipple ring with a depth of 2 mm (item 18).

The procedure for connecting to a rubber corrugated tube:

insert the nipple ring from the inner diameter side into the protrusion of the nipple in the form of a ring;

insert the nipple with the ring into the nut;

insert the union nut with the nipple ring and the nipple itself (pos. 14, 15) inside the lower connecting part of the rubber corrugated hose (pos. 2), then perform gluing;

additionally secure it using a metal clamp between the lower connecting part of the rubber corrugated hose and the union nut with the nipple ring and the nipple itself (item 6).

The procedure for connecting the rubber corrugated tube to the front part of the filtering RPE:

you need to take the rubber corrugated tube in your hand by the bayonet corner adapter and insert it with the holes (3 trapezoidal holes) into the grooves of the bayonet mount (3 trapezoidal protrusions) and then turn clockwise until it stops.

Options for connecting a rubber corrugated tube to the front part of the filtering RPE.

The front part of the filtering RPE, which has bayonet fastenings of the UNIX standard, MSA and their analogues, has bayonet fastenings on 2 sides of the mask (half mask) on the right and left, so there are 3 options for connecting a rubber corrugated tube to the front part of the filtering RPE (Fig. 8, Fig. 9 ):

Option 1 - a rubber corrugated tube is connected on the right to the front part of the filtering RPE, and a plug is installed on the left side of the bayonet mount.

Option 2 - a rubber corrugated tube is connected on the left to the front part of the filtering RPE, and a plug is installed on the right side of the bayonet mount.

Option 3 - a rubber corrugated tube is connected on the left and right to the front part of the filtering RPE, that is, 2 rubber corrugated tubes are connected at the same time.

The procedure for connecting a threaded filter with an external thread diameter of 40 mm to a rubber corrugated tube: you need to take the filter in your hand and screw it clockwise along the thread until it stops into the union nut of the developed rubber corrugated tube. All filters with threads in accordance with GOST 8762-75 are suitable for connection to a rubber corrugated tube.

For ease of use of filters having a thread in accordance with GOST 8762 with a developed rubber corrugated tube and filtering RPE having bayonet fastenings of the UNIX, MSA standard and their analogues, it is recommended to use a bag for a gas mask. The bag for the gas mask is not worn over the shoulder and the filter is placed in the bag. In case of using 2 filters at the same time, 2 bags for gas masks are used.

The declared technical result is achieved by connecting the developed rubber corrugated tube from the side of the corner bayonet adapter to the external bayonet mount of the UNIX, MSA standard and their analogues of the front part of the filtering RPE, and on the other side by connecting a threaded filter having an external thread diameter of 40 mm.

The rubber corrugated tube is connected to the external bayonet fastening of the front part of the filtering RPE by inserting the corner bayonet adapter into the grooves of the external bayonet fastening of the front part of the filtering RPE and turning it clockwise until it stops.

Connecting a filter with thread parameters in accordance with GOST 8762-75 to the developed rubber corrugated tube occurs by screwing the filter clockwise until it stops into the hole of the union nut with a nipple ring.

Brief description of drawings and other graphic materials

Fig. 1. Image of a UNIX 6100 full-face mask with a connected rubber corrugated tube and a combined filter of protection class 3 FK-5B A3B3E2K2P3.

Fig. 2. Diagram and image of a rubber corrugated tube in assembled and disassembled form.

In fig. 2 the following notations are adopted:

1 - upper connecting part of the rubber corrugated hose;

2 - lower connecting part of the rubber corrugated hose;

3 - transverse folds (corrugations) of the rubber hose;

4 - union nut with nipple ring and nipple itself;

5 - corner bayonet adapter;

6 - metal clamps.

Fig. 3. Angled bayonet adapter, side and end views.

In fig. 3 the following notations are adopted:

7 - base of the corner bayonet adapter;

8 - surface, which is an ellipse connecting the base and the bayonet connection of the corner bayonet adapter;

9 - bayonet connection of the corner bayonet adapter;

10 - stiffener;

11 - trapezoidal hole with a large trapezoid base 12 mm;

12 - trapezoidal hole with a large trapezoid base 8 mm;

13 - bayonet mount travel lock.

Fig. 4. Corner bayonet adapter, view from the bayonet connection side.

In fig. 4 the following notations are used:

7 - base of the corner bayonet adapter;

9 - bayonet connection of the corner bayonet adapter;

11 - trapezoidal hole with a large trapezoid base 12 mm;

12 - trapezoidal hole with a large trapezoid base 8 mm;

13 - bayonet mount travel lock.

Fig. 5. Axonometric vertical section of the angled bayonet adapter along the central center line.

In fig. 5 the following notations are adopted:

7 - base of the corner bayonet adapter;

8 - surface, which is an ellipse connecting the base and the bayonet connection of the corner bayonet adapter;

9 - bayonet connection of the corner bayonet adapter;

10 - stiffener;

13 - bayonet mount travel lock.

Fig. 6. Image of a union nut with a nipple ring and the nipple itself, assembled and separately.

In fig. 6 the following notations are adopted:

14 - nipple assembly with rubber nipple ring;

15 - nut;

16 - nipple;

17 - rubber nipple ring;

18 - a hole made along the entire diameter of the inner circumference of the nipple ring with a depth of 2 mm.

Fig. 7. Image of the Advantage® 200 LS half mask with a connected rubber corrugated tube and combined filter Breeze-3001 A1B1E1K1P1RD (connection options).

In fig. 7 the following notations are adopted:

A - option for simultaneous connection of 2 developed rubber corrugated tubes on the right and left sides of the Advantage® 200 LS half mask;

B, C - an option for connecting the developed rubber corrugated tube on the right and left sides of the Advantage® 200 LS half mask and a plug on the other side of the half mask.

Fig. 8. Image of a UNIX 6100 full-face mask with a connected rubber corrugated tube and a Breeze-3001 A1B1E1K1P1RD combined filter (connection options).

In fig. 8 the following notations are adopted:

A - option for simultaneous connection of 2 developed rubber corrugated tubes on the right and left sides of the UNIX 6100 full-face mask;

B, C - an option for connecting the developed rubber corrugated tube on the right and left sides of the UNIX 6100 full-face mask and a plug on the other side of the mask.

Fig. 9. The order of implementation of a utility model from the blank to the finished product (images of 4 connecting tubes).

In fig. 9 the following notations are adopted:

5 - corner bayonet adapter;

6 - metal clamp;

19 - connecting tube, developed according to GOST 12.4.166-85;

20 - screw clamp;

21 - pipe.

Implementation of a utility model

The claimed rubber corrugated tube was made on the basis of a connecting tube developed according to GOST 12.4.166-85, which was used as a blank, as follows (Fig. 9):

1. From the connecting tube (pos. 19), using pliers and a screwdriver, the metal clamp (pos. 6) was bent and the screw clamp (pos. 29) and the pipe (pos. 21) from the upper part of the connecting tube were removed.

2. The corner bayonet adapter was made using 3D printing, the material used was PETG plastic (item 5).

To print the corner bayonet adapter, a 3D printer was used - the Anycubic i3 Mega-S model.

3. The corner bayonet adapter was connected to the upper part of the connecting tube using glue, and then secured using a metal clamp (item 6).

For gluing the products, BF-2 glue was used.

The tightness of the developed rubber corrugated tube was tested in a tent for testing gas masks according to the standard method, which is used by the troops of the National Guard of the Russian Federation to test gas masks.

The tightness tests of the developed rubber corrugated tube were carried out on the basis of the Federal State Institution “Main Center for Scientific Research of the Federal Service of the National Guard Troops of the Russian Federation.”

A UNIX 6100 full-face mask was used as a filtering RPE; a plug was connected to the left side of the external bayonet fastening, and a developed rubber corrugated tube with an installed filter of protection class 3 FK-5B АЗВЗЭ2К2РЗ was connected to the right side of the external bayonet fastening.

To test the tightness of the developed rubber corrugated tube, an aerosol of chlorobenzalmalonodinitrile (CS) was used as a test substance. To create an intolerable concentration of CS (for a person without filtering RPE), a hand-held gas grenade “Siren-6” was used. After using the Lilac-6 gas grenade, one of the authors of the utility model wearing a UNIX 6100 full-face mask and a combined filter of protection class 3 FK-5B A3B3E2K2R3 connected through a rubber corrugated tube (for convenience, the filter was placed behind the back, in a bag for storing a gas mask) The team of the test manager shook his head in different directions (10 swings), then performed squats - 10 times.

During testing, no leakage of the CS substance into the respiratory organs or eyes was recorded. It was concluded that the developed rubber corrugated tube, which was tested, was leak-tight.

Claims (2)

1. Rubber corrugated tube connecting the external bayonet fastening of the front part of the filter of personal respiratory protection with the external threaded fastening of the filter, containing a rubber corrugated hose, to which an angular bayonet adapter is connected using glue and metal clamps from the upper connecting part, and from the lower connecting part - a union nut with a nipple ring and the nipple itself, characterized in that the corner bayonet adapter contains a bayonet connection made in the form of a circle, inside of which there is a hole for a bayonet fastening of the front part of the filter personal respiratory protection device, and the bayonet fastening is made in the form of a circle with a diameter of 25 mm with three trapezoidal protrusions, two of which have a larger base equal to 12 mm, the third has a larger base equal to 8 mm, while the trapezoidal protrusions are located at an angle of 120° relative to each other, and inside the bayonet connection there are 3 bayonet fastening travel stops . 2. Rubber corrugated tube according to claim 1, characterized in that the base of the corner bayonet adapter is made with a stiffening rib.