SU1340771A1 - Arrangement for underwater swimming - Google Patents

Abstract

The invention relates to scuba diving and allows you to increase the actual diving time of sportsmen by an amount of 30-35% of the normal time spent under water, to eliminate the ingress of water into the nasal cavities of divers, to significantly reduce the pressure of blood vessels. on the face of the divers due to the attachment to the lower part of the body of the mask of a pneumatic container in the form of a sylphon. The latter communicates with the internal cavity of the mask body through an opening and has a bottom made in the form of a massive disk. There is a check valve in the disc. When an athlete dives, the bellows compresses, and the air from it goes into the working cavity of the mask body, balancing external and internal pressure. Leaking through the leakage of the body, water accumulates in the lower part of the bellows, increasing several pressure inside the body and the bellows, which leads to automatic Bleeding water through a check valve. 1 il. (L co 4

Description

The invention relates to the sport, namely, devices for the supply | from the sea.

The purpose of the invention is to improve performance and ease of use.

The drawing shows schematically the device, a longitudinal section.

The scuba diving apparatus comprises a mask 1, the body of which has an elastic seal 2 and carries means 3 for fastening the mask 1 on the head and a pneumatic container

As the diver submerges under water, the external pressure of the water acting on the mask 1, the diver's head and bellows A increases by about 0.1 bar for each meter of immersion, which leads to an increase in the resulting force of pressure on the outer surface of the protective glass 8 and consequently, an elastic seal 2 between the mask body 1 and the face of the diver. However, at the same time, the external pressure on the

ten

elastic bellows A,

, constantly looking like an elastic bellows 4, inversely downward, i.e. in the zone of the lowest valve 5. high pressure, and with a length of

In the lower part of the mask case 1, a vertical opening 6 is made, and the bellows 4 is installed with a possibility of communication with the cavity of the mask 1 through this opening, wherein the bottom of the bellows 4 is made in the form of a massive disk 7, and a check valve 5 is installed in the disk. In the front of the mask is set 3aiiUiTHoe glass 8.

The volume of the internal cavity of the bellows 4, stretched in air under the influence of the weight of the massive disk 7, is from 1.2 to 1.3 times the working volume of the internal cavity of the mask body. The diameter of the bellows 4 and the weight of the massive disk 7 are matched at the rate of 50–59 g / cm of the lower surface of the bellows. The length of the bellows 4 in the extended state under the weight of the massive disk is from 50 to 60 cm.

Use the device as follows.

Ready for scuba diving, the athlete-diver closes the elas- TH4Hbrfi mask body 1 on the face of the head, which results in sealing the inner working cavity of the mask body at atmospheric pressure. At the same time, the bellows 4 is stretched to the maximum length under the action of the massive disk 7 and is also under atmospheric pressure, since occasional exhalations of the diver into the internal cavity of the mask body 1 lead to the release of excess air through the leakiness of the elastic seal 2 and through check valve 5.

Regardless of head tilts

20

thirty

35

bellows .50 cm, the overpressure acting on the lower part of the bellows 4 is about 0.05 atm more than in its upper part, which almost compensates for the tensile effect of the disk 7 when the mask body 1 is immersed in water.

Upon further immersion of the diver in the water, the bellows 4 begins to compress, and part of the air from its internal cavity flows into the internal cavity of the mask body 1, which leads to stabilization of the pressure drop inside the mask 1 and outside at the level of 0.05 MPa mini pressure of the body of the mask 1 on the front of the head of the diver and the leakage of water into the internal cavity of the body of the mask 1 by minimizing pressure drops inside and outside the body of the mask 1. This occurs before the practical threshold of immersion lschikov with masks without the use of diving equipment, constituting from 15 to 20 m. nyr lschika as approaching to the physiological threshold immersion depth bellows continues to be compressed, and a depth of 20 meters under the above couple meters resultant its length is about 10 cm.

When the dive is under water for a long time, despite a very small pressure drop outside the mask body and inside it, through the elastic seal 2 of the mask 1 into the internal cavity of the mask body 1 water flows, which, at the bottom of the mask body 1, flows into the lower

40

45

50

The finder's nff is the loose end of the sil- part of the bellows 4 and accumulates there, the background 4 under the action of the disk 7 always excludes water from entering the

The nasal cavities of the nosepiece, up to its periodic overturning, are oriented towards the center of the globe (down).

3407712

As the diver submerges under water, the external pressure of the water acting on the mask 1, the diver's head and bellows A increases by about 0.1 bar for each meter of immersion, which leads to an increase in the resulting force of pressure on the outer surface of the protective glass 8 and consequently, an elastic seal 2 between the mask body 1 and the face of the diver. However, at the same time, the external pressure on

ten

elastic bellows A,

0

0

five

bellows .50 cm, the overpressure acting on the lower part of the bellows 4 is about 0.05 atm more than in its upper part, which almost compensates for the tensile effect of the disk 7 when the mask body 1 is immersed in water.

Upon further immersion of the diver in the water, the bellows 4 begins to compress, with some of the air from its internal cavity flowing into the internal cavity of the body of the mask 1, which leads to stabilization of the pressure drop inside the mask 1 and outside at the level of 0.05 MPa mini pressure of the body of the mask 1 on the front of the head of the diver and the leakage of water into the internal cavity of the body of the mask 1 by minimizing pressure drops inside and outside the body of the mask 1. This occurs before the practical threshold of immersion athletes maskers without scuba gears, ranging from 15 to 20 meters. As the diver approaches the physiological threshold of the depth, the bellows continues to compress, and at a depth of 20 meters with the above parameters, its resultant length is about 10 cm.

When the dive is under water for a long time, despite a very small pressure drop outside the mask body and inside it, through the elastic seal 2 of the mask 1 into the internal cavity of the mask body 1 water flows, which, at the bottom of the mask body 1, flows into the lower

0

five

0

part of the bellows 4 and accumulates there, which prevents water from entering the

the nasal cavities of the nosepiece until its periodic turning over

com up. As the leaking water accumulates in the lower part of the cavity of the bellows 4, its level increases, which leads to the appearance of a pressure difference of 0.003 to 0.005 (water level from 3 to 9 cm in the lower part of the bellows) between the liquid inside the bellows 4 and outside of it, leads to the actuation of the check valve 5 and the discharge of excess water into the environment. With a natural length of a rubber petal check valve from 4 to 5 cm, this is practically the case - a cluster of a noticeable amount of water (more than one, two cubes) in the lower part of the bellows 4.

With a long voyage gradually due to incomplete tightness

the internal cavity of the mask case has the 2o quality and ease of use, in

the spirit from the internal cavities of the mask body 1 and bellows 4 is partially relieved, which leads to a decrease in the working length of the bellows 4. This is compensated for by periodically bleeding the air diver on the lungs through the nasal cavities inside the core

of mask 1 when it ascends for ventilation of the lungs. At a depth of 3 to 12 m, part of the air from the inner cavity of the bellows 4 can be taken by experienced divers to extend the dive time by an amount of 30% to 35% of the normal underwater time.

Claims (1)

The invention The device for scuba diving, containing a mask, the body of which has an elastic seal and carries a means for mounting the mask on the head and a pneumatic container in the form of a bellows, and a check valve, characterized in that, in order to increase the operational The lower part of the mask housing has a vertical opening, and the bellows is installed with a possibility of communication with the mask cavity through this opening, while the bottom of the bellows is made in the form of a massive disk, and the check valve is installed in the disk. Editor M.Nedoluzhenko Compiled by V.Matveev Tehred L. Serdyukova Proofreader S. Cherni Order 4373/9 Circulation 396 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., dL / 5 Production and printing company, Uzhgorod, Projecto st., 4