Positive pressure air breathing apparatus for firefighting

A respirator and fire-fighting technology, applied in the direction of respiratory protection devices, life-saving equipment, etc., to ensure normal air supply, ensure stable delivery, and improve the use time

Active Publication Date: 2022-01-25
郝志勇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a positive pressure air respirator for firefighting, which has the advantages of being convenient for firefighters to use for a long time and does not affect the use experience, and solves the technical problems mentioned in the background technology

Method used

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  • Positive pressure air breathing apparatus for firefighting
  • Positive pressure air breathing apparatus for firefighting
  • Positive pressure air breathing apparatus for firefighting

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Embodiment Construction

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] see Figure 1-3 , a positive pressure air respirator for fire fighting, comprising a pressure reducer body 1, the inside of the pressure reducer body 1 is provided with a high-pressure chamber 101, a ventilation groove 107 and a low-pressure chamber 102, and the high-pressure chamber 101 and the low-pressure chamber The chamber 102 is connected through the ventilation groove 107. The pressure reducer body 1 is provided with an introduction groove 103 co...

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Abstract

The invention relates to the field of fire-fighting breathing equipment, and discloses a positive-pressure air respirator for fire-fighting. The chamber and the low-pressure chamber are connected through a ventilation groove, and an introduction groove communicated with the high-pressure chamber is opened on the body of the pressure reducer. The positive pressure air respirator for fire fighting is designed through the structural design of the positioning bobbin and the elastic rubber membrane in the low-pressure chamber, and makes the positioning bobbin connected to the pressure regulating tube on the side of the high-pressure chamber. When the oxygen cylinder is placed vertically in the high-pressure chamber Oxygen pressure is unstable, and high-pressure oxygen flows into the positioning barrel, causing the elastic rubber film to bounce downwards, and drive the valve stem and valve core to move down, so that the pressure in the low-pressure chamber is reduced and the state of balance is restored. When the oxygen in the high-pressure chamber increases, exhaust and pressure relief is performed, which causes the problem of oxygen waste and prolongs the service life of the air respirator.

Description

technical field [0001] The invention relates to the field of fire-fighting breathing equipment, in particular to a positive-pressure air breathing apparatus for fire-fighting. Background technique [0002] Positive pressure air breathing apparatus is a self-contained open fire-fighting air breathing apparatus commonly used in the field of firefighting. For fire extinguishing, emergency rescue and rescue work, the positive pressure air respirator is mainly composed of a breathing mask and an oxygen cylinder. The oxygen in the oxygen cylinder is in a high-pressure state, so a pressure reducer is needed to decompress the high-pressure oxygen in the oxygen cylinder. , and then delivered to the breathing mask so that firefighters can breathe normally. [0003] However, in the existing positive pressure air respirator, when the pressure reducer is in use, when the oxygen supply pressure of the oxygen cylinder changes, that is, the pressure in the high pressure chamber in the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62B9/02
CPCA62B9/02
Inventor 郝志勇宋佳周圆鹤
Owner 郝志勇
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