Breathing apparatus

FIELD: personal use articles.

SUBSTANCE: breathing apparatus comprises a compressed gas source, a mask, an emergency oxygen delivery device comprising a housing with a seat, a supply valve sealingly mounted in the housing, a control valve mounted in the inlet valve, a lid, a membrane sealingly fixed between the housing and the lid, a rod connecting the membrane and the control valve. According to the invention the control valve and the rod are mounted with the ability of axial movement with the supply valve, at that the rod on one side is rigidly connected to the membrane, and on the other it is in contact with the control valve.

EFFECT: decrease in breathing resistance due to reducing the response time of the emergency oxygen delivery device to change of needs of the user in the gas flow at various modes of breathing, increased ease of use by providing automatic switching on, switching off the emergency oxygen delivery device during docking, undocking with the mask or automatic switching off the emergency oxygen delivery device during undocking with the mask and switching on the emergency oxygen delivery device with the first inhale after docking with the mask.

3 cl, 9 dwg

 

Area of technology

The invention relates to means of life support, namely to devices for protection of respiratory organs and the human eyesight from the harmful effects of unbreathable, toxic and smog-gas environment, and can be used, in particular, in the manufacture of breathing apparatus, compressed air pneumatically controlled inlet valve and excess pressure under the mask.

Prior art

The prior art discloses various designs contained breathing apparatus.

In particular, the patent US 5,464,009 published 07.11.1995, and in the patent US 6,394,091 published 28.05.2002, breathing apparatus are disclosed, each of which comprises a source of compressed gas, pulmonary machine with pneumatically controlled valve and mask with valve box.

The disadvantage of these devices is the large response time lung machine to change modes of breathing of the user and, consequently, increased breathing resistance throughout the range of pulmonary ventilation.

The closest to the claimed invention is a breathing apparatus with a valve controlled light, disclosed in the patent US 5,016,627 published 21.05.1991 containing a source of compressed gas, pulmonary machine, comprising a housing with inlet fitting, cover, waterproof�partially fixed between the housing and the cover membrane, an inlet valve mounted in the housing with the formation of the flow chamber, the output of which is made in the form of a saddle of the valve cooperating with the valve seat of the flow control valve, mask with valve box.

The disadvantages of this breathing apparatus is the low performance of the pulmonary machine, due to a significant reaction time is pneumatically controlled supply valve to the changing needs of the user in the gas flow for various modes of breathing, making it difficult to control the flow of gas to the user and causes an increase in breathing resistance; the need for the user to create negative pressure under the mask to enable lung machine.

Disclosure of the invention

The claimed invention is directed to the achievement of the technical result consists in reducing the breathing resistance by reducing response time lung machine to changing user needs in the gas flow for various modes of breathing, and to enhance usability by providing automatic on/off lung machine when docking/undocking with a mask or disable automatic lung machine when undocking with the mask and the inclusion of the lung demand valve first breath after docking with the mask.

Said technical result is achieved due to the fact that the breathing apparatus comprises a source of compressed gas, mask, demand valve, comprising a housing with a saddle valve sealingly mounted in the housing, a control valve in the valve cover, the membrane is hermetically fixed between the housing and the cover, cravings, binding the membrane and the control valve, the control valve and the rod mounted for axial movement with the valve, pull with one hand rigidly connected with the membrane and is in contact with the control valve.

In addition, this technical result is achieved in that lung machine is further provided a rod with a spring and a lever mounted in the housing, when the lever is in contact with the rod, and the rod is in contact with an emphasis on the mask. This construction allows to provide a mechanism on/off switch, which when undocking with a mask across a connected membrane and traction with a lever and spring-loaded stem off demand valve, closing the valve stopping the flow of air from the inlet fitting), and when docking with a mask with a special emphasis in the valve box allows you to start working lung machine without additional mechanical manipulations. Also pulmonary autom�t may be provided with an annular spring fixing of the membrane is in the off position with closed valves. In the performance ring spring fixing to start working (air supply from the inlet stutzeri) you must create a vacuum in podobrannoj cavity, taking the first breath.

Brief description of the drawings

The invention is illustrated by drawings, where:

Fig.1 is a perspective view of a breathing apparatus with lung machine;

Fig.2 is a longitudinal sectional view of the mask with lung machine in the "on" state at the stage of exhalation;

Fig.3 shows a longitudinal section of the mask with lung machine with a rod connecting the diaphragm and the control valve in the "on" state at the stage of exhalation;

Fig.4 shows a mask with lung machine in the "on" state at the stage of inhalation (longitudinal section);

Fig.5 shows lung machine with an extra rod with a spring and a lever mounted in the housing, in the off state (longitudinal section);

Fig.6 shows a longitudinal section of the mask with an extra rod with a spring and a lever mounted in the housing, in the "on" state at the stage of exhalation;

Fig.7 shows the arrangement of the thrust mechanism and on/off switch (cap membrane and conventionally not shown);

Fig.8 - lung machine with ring spring fixing of the membrane is in the off state (longitudinal section);

Fig.9 shows a longitudinal section of a mask legionellaceae ring spring fixing of the membrane is in the off state.

The implementation of the invention

The breathing apparatus includes a source of compressed gas, for example a cylinder with pressure reducer (not shown), the mask 1 with the valve box 2, in which is mounted a spring-loaded exhalation valve 3, demand valve 4, which connects with one side of the valve box 2 and on the other hand through the inlet pipe 5 with a source of compressed gas. Lung machine consists of a body 6 with made in it by the saddle 9, the cover 7 and sealed between the membrane 8. The valve 10 has one side seal 12 that is in contact with the saddle 9 and the other side is connected with the piston 18. At the same time valve made the saddle 11 in contact with seal 15 of the control valve 14. The valve 10 is installed in the housing 6 with the formation of the flow chamber 17, through which the channel 13 is connected on one side through the nozzle 16 with the cavity of the compressed gas, and on the other side over the saddle 11 with podobrannoj cavity associated with the lungs of the user. The diameter of the seat 9 is less than the diameter of the piston 18. The control valve 14 is coaxially installed directly in the valve 10 with the possibility of joint movement with the diaphragm 8 by the thrust of the 20 that is installed in the housing 6, with one side in contact with the control valve 14 and is rigidly connected to the diaphragm 8 through the plan�19.

The mechanism on/off lung machine includes a rod 21 mounted in the housing 6, in which the axis 25 to move the lever 22 mounted in the housing 6 on the axis 24, the spring 23. In the cover 5 of the lung demand valve 4 may be fixed annular spring fixing 26 to secure the membrane in the off position with closed valves at connection lung demand valve 4 with mask 1.

Breathing apparatus operates as follows.

During inhalation the pressure in podobrannoj cavity decreases, the membrane 8 under the action of the ambient pressure due to the force generated by the compressed gas from the control chamber 17 to the control valve 14 begins to move along the axis of the lung demand valve and the control valve 14 out of contact with the seat 11 of the valve 10. Due to the fact that the flow area of the nozzles 16 is much less than the flow area of the seat 11, the pressure in the control chamber 17 is reduced and the valve 10 begins to move along the axis of the pulmonary machine, stepping out of contact with the seat 9 and opening the flow of gas to the user. Thus at the expense of the ability to move the diaphragm in one direction with the valve 10, the movement of the control valve 14 relative to the seat 11 occurs before the movement of the supply valve 10 and the piston 18, and the value of e�wow move is supported by the minimum required regardless of the amount of displacement of the piston 18 and the valve 10 in the whole range of pulmonary ventilation. This can significantly reduce the reaction time of the valve 10 to change the required gas flow in various modes of breathing created by the user in the process.

In the absence of gas consumption by the user or in the exercise of exhaling the compressed gas through the seat 9 of the housing 6 and the saddle 11 hits podobrannyy cavity. The pressure in podobrannoj cavity increases, and due to the pressure difference between podobrannoj cavity and the environment the diaphragm 8 moves with a lever 20 of the control valve 14 to contact the cushion valve 15 and the seat 11 of the valve 10. The magnitude of overpressure in podobrannoj cavity is determined by the force required to hold in the closed position of the control valve 15 with an operating gas pressure in the control chamber 17. The pressure in the control chamber 17 through the nozzle 16 is aligned to the values of working pressure at the entrance to the pulmonary machine. In this case due to the fact that the diameter of the seat 9 is less than the diameter of the piston 18 from the side of the flow chamber 17, creates a force that moves the piston 18 of the valve 10 until the contact seal 12 and the seat 9. Simultaneously with the movement of the piston 18 and the valve 10 is moved and in contact with the saddle 11, the control valve 14. The exhalation of the user in the environment due to the opening of �odpowiedniego exhalation valve 3.

When not docked with mask 1 lung machine 4, the lever 22, the pivots 24 under the action of the spring 23 of the rod 21, through the bar 19 and cravings 20 closes the control valve 14 and the valve 10. When the power source of compressed gas through the gas inlet pipe 5, the nozzle 16 and channel 13 enters the control chamber 17. For docking lung machine 4 with mask 1 reciprocating insert the outlet of the housing 6 in the receiving part of the valve box 2 to the moment of fixing of the housing 6 in a valve chest 2. In this position, the demand valve 4 is linked up with the mask, the stem 21 is moved up into contact with the stop valve in box 2, the stem 21 releases the lever 22 and the membrane 8, translating lung machine in the operating mode, the compressed gas is supplied to the valve 10, demand valve in position "on". Performed with the annular spring fixing 26 at connection lung demand valve 4 with mask 1, the rod 21 moves upward, coming into contact with the stop valve in box 2, the stem 21 releases the lever 22, but the membrane 8 is held by a ring spring 26, opening the valve to supply air. At the first breath in podobrannoj cavity creates a vacuum and the membrane 8 is broken with a spring 26, translating lung machine in working mode.

When disconnecting the lung demand valve 4 from the mask 1, the rod 21 under the action of the snap�NY 23 moves downward, turning the lever 22 about the axis 24. The lever 22 through the bar 19 and cravings 20 off lung machine 4, closing the valve stopping the flow of gas).

1. Breathing apparatus, comprising a source of compressed gas, mask, demand valve, comprising a housing with a saddle valve sealingly mounted in the housing, a control valve in the valve cover, the membrane is hermetically fixed between the housing and the cover, cravings, binding the membrane and the control valve, characterized in that the control valve and the rod mounted for axial movement with the valve, pull with one hand rigidly connected with the membrane, and in contact with the control valve.

2. Breathing apparatus according to claim 1, wherein said demand valve stem is further provided with a spring and a lever mounted in the housing, when the lever is in contact with the rod, and the rod is in contact with an emphasis on the mask.

3. Breathing apparatus according to claim 2, characterized in that lung machine is provided with an annular spring fixing of the membrane is in the off position.



 

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