Positive pressure oxygen breathing apparatus integrated combination breathing chamber

Abstract

The utility model discloses a kind of positive pressure oxygen respirator integrated combination formula breathing cabin, which is composed of cabin body, purifying tank, cooler and air bag. The air bag is installed in the inner cavity of cabin body by pressing plate, and spring is arranged between the inner wall of pressing plate and the outside of air bag. The outside of air bag is also provided with an exhaust valve, and the upper end of the exhaust valve is attached to the inner wall of the pressing plate. The purifying tank is connected to the cabin body by quick insertion, and the inner opening of the purifying tank is sealingly connected to the air inlet of the air bag. The cooler and the cabin body are integrated. The utility model improves safety and reliability, and also facilitates disassembly, repair and replacement of adsorbent in later period. In addition, it is convenient to process, and assembly and maintenance are simple, reducing the workload and cost of later maintenance. The utility model has simple structure and reasonable design, fills the blank of such breathing cabin, and is worth popularization and application.

Description

Technical Field

[0001] This utility model belongs to the technical field of isolated positive pressure oxygen respirators, and relates to an integrated combined breathing chamber for positive pressure oxygen respirators. Background Technology

[0002] Positive pressure self-contained breathing apparatus (PPB) is mainly used in mining, chemical, petroleum, metallurgy, and tunnel industries by specially trained emergency rescue personnel during disaster relief and accident handling. The breathing chamber is the main component of the PPB, consisting of a chamber body, a clean canister, a cooler, and an air bag. The air bag is installed inside the chamber body; the clean canister and cooler are installed on the upper part of the chamber body. The exhalation inlet of the air bag is connected to the inner opening of the clean canister, and the outer opening of the clean canister is connected to the full face mask via an exhalation hose and exhalation valve. The oxygen inlet of the air bag is connected to the oxygen cylinder via a hose and pressure reducer. The air outlet of the air bag is connected to the inner opening of the cooler, and the outer opening of the cooler is connected to the full face mask via an inhalation hose and inhalation valve.

[0003] During use, when the wearer exhales, the exhaled air passes through the full-face mask, exhalation hose, and exhalation valve into the purification canister. The absorbent (calcium hydroxide) in the purification canister absorbs the carbon dioxide in the air, and the remaining air enters the airbag. Compressed oxygen stored in the oxygen cylinder is depressurized by the pressure reducer before entering the airbag, where it mixes to form oxygen-containing gas. When the wearer inhales, the oxygen-containing gas flows from the airbag through the cooler, inhalation hose, inhalation valve, and full-face mask into the wearer's respiratory organs, completing one breathing cycle. Throughout this process, because both the exhalation and inhalation valves are one-way valves, the airflow is ensured to always circulate in one direction.

[0004] Currently, the clean tank, cooler, and airbag of the self-contained positive pressure oxygen respirator are all separate structures, which are more complex to process and assemble, increasing the workload and cost of later maintenance. Utility Model Content

[0005] The purpose of this utility model is to provide an integrated combined breathing chamber for a positive pressure oxygen respirator that is simple in structure, reasonable in design, can effectively improve safety and reliability, and is easy to operate and maintain.

[0006] The technical solution adopted by this utility model is as follows: The breathing chamber consists of a chamber body 3, a purification canister 1, a cooler 2, and an airbag 7, wherein: the airbag 7 is installed inside the chamber body 3, and has an exhalation inlet 9, an oxygen inlet, and an outlet; the purification canister 1 and the cooler 2 are respectively installed on the upper part of the chamber body 3; the exhalation inlet 9 of the airbag 7 is connected to the inner exhalation port 10 of the purification canister 1, and the outer exhalation port 11 of the purification canister 1 is connected to the full face mask via an exhalation hose and an exhalation valve; the oxygen inlet of the airbag 7 is connected to the oxygen cylinder via a hose and a pressure reducer; the outlet of the airbag 7 is connected to the inner inhalation port of the cooler 2, and the outer inhalation port 12 of the cooler 2 is connected to the full face mask via an inhalation hose and an inhalation valve; its characteristic is: The airbag 7 is installed in the inner cavity of the cabin 3 via a pressure plate 4. A spring 5 is provided between the inner wall of the pressure plate 4 and the outer side of the airbag 7. An exhaust valve 6 is also provided on the outer side of the airbag 7, with the upper end of the exhaust valve 6 abutting against the inner wall of the pressure plate 4. The cleansing canister 1 and the cabin 3 are connected by a quick-connect plug-in connection, and the inner exhalation port 10 of the cleansing canister 1 is sealed to the exhalation inlet 9 of the airbag 7. The cooler 2 and the cabin 3 are an integral structure.

[0007] This utility model has the following advantages: 1. Since the airbag is installed inside the cabin cavity via a pressure plate, the airbag is in an independent space formed by the pressure plate and the cabin cavity. As oxygen from the oxygen cylinder slowly enters the airbag, positive pressure is formed inside the airbag. As the amount of oxygen increases, the airbag will slowly inflate upward under the limit of the spring. When it inflates to a certain distance, the exhaust valve fixed on the airbag will touch the inner wall of the pressure plate, and the exhaust valve will start to work, expelling excess oxygen from the cabin, thus improving safety and reliability.

[0008] 2. Because the purification canister and the chamber are connected by a quick-connect plug-in connection, and the inner opening of the purification canister is sealed to the air inlet of the airbag, the airtightness between the purification canister and the airbag is ensured, while also facilitating disassembly, maintenance and later replacement of the adsorbent (calcium hydroxide).

[0009] 3. Since the cooler and the cabin are an integrated structure, the processing is convenient, the assembly and maintenance are simple, and the workload and cost of later maintenance are reduced.

[0010] This utility model has a simple structure and reasonable design, filling the gap in this type of breathing chamber and is worthy of widespread promotion and application. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Rear view; Figure 3a Figure 3b These are schematic diagrams showing the connection of the purification container of this utility model.

[0012] In the diagram: 1-Cleansing tank; 2-Cooler; 3-Chamber; 4-Pressure plate; 5-Spring; 6-Exhaust valve; 7-Airbag; 8-O-ring seal; 9-Exhalation inlet; 10-Exhalation inner port; 11-Exhalation outer port; 12-Inhalation outer port. Detailed Implementation

[0013] like Figure 1 , Figure 2 As shown, the lower end of the spring 5 is fixed to the outside of the airbag 7.

[0014] The pressure plate 4 is detachably connected to the side wall of the cabin 3, such as by snap-fit ​​or screws, to facilitate the disassembly and assembly of the airbag for installation, replacement, and maintenance.

[0015] The function of the exhaust valve 6 is to ensure that the highest breathing resistance in the respiratory system does not exceed 700Pa, and to release pressure when the pressure exceeds this value.

[0016] The cooler 2 and the cabin 3 are an integral structure, that is, during processing, the cooler 2 and the cabin 3 are integrally formed.

[0017] like Figure 3a Figure 3b As shown, the inner exhalation port 10 of the cleansing canister 1 is inserted into the exhalation inlet 9 of the airbag 7. An O-ring 8 is provided on the inner exhalation port 10 of the cleansing canister 1 to form a seal between the inner exhalation port 10 of the cleansing canister 1 and the exhalation inlet 9 of the airbag 7, so as to maintain airtightness.

Claims

1. A positive pressure oxygen respirator integrated combined breathing chamber, the breathing chamber being composed of a chamber body (3), a clean tank (1), a cooler (2), and an air bag (7), wherein: An airbag (7) is installed inside the cabin (3), and has an exhalation inlet (9), an oxygen inlet, and an outlet. A purification canister (1) and a cooler (2) are installed on the upper part of the cabin (3). The exhalation inlet (9) of the airbag (7) is connected to the inner exhalation port (10) of the purification canister (1), and the outer exhalation port (11) of the purification canister (1) is connected to the full-face mask via an exhalation hose and an exhalation valve. The oxygen inlet of the airbag (7) is connected to the oxygen cylinder via a hose and a pressure reducer. The outlet of the airbag (7) is connected to the inner inhalation port of the cooler (2), and the outer inhalation port (12) of the cooler (2) is connected to the full-face mask via an inhalation hose and an inhalation valve. Its characteristics are: The airbag (7) is installed in the inner cavity of the cabin (3) via a pressure plate (4), and a spring (5) is provided between the inner wall of the pressure plate (4) and the outer side of the airbag (7); an exhaust valve (6) is also provided on the outer side of the airbag (7), and the upper end of the exhaust valve (6) is abutted against the inner wall of the pressure plate (4); The cleansing canister (1) and the cabin body (3) are connected by a quick-connect plug-in connection, and the inner exhalation port (10) of the cleansing canister (1) is sealed to the exhalation inlet (9) of the airbag (7); The cooler (2) and the cabin (3) are an integral structure.

2. The integrated combined breathing chamber for positive pressure oxygen respirators according to claim 1, characterized in that: The lower end of the spring (5) is fixed to the outside of the airbag (7).

3. The integrated combined breathing chamber for positive pressure oxygen respirators according to claim 1, characterized in that: The pressure plate (4) is detachably connected to the side wall of the cabin (3).

4. The integrated combined breathing chamber for positive pressure oxygen respirators according to claim 1, characterized in that: The inner exhalation port (10) of the cleansing canister (1) is inserted into the exhalation inlet (9) of the airbag (7). An O-ring (8) is provided on the inner exhalation port (10) of the cleansing canister (1) to form a seal between the inner exhalation port (10) of the cleansing canister (1) and the exhalation inlet (9) of the airbag (7).

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