JPH0723698U - Diving respirator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a diving breathing apparatus having a simple structure and easy to assemble. In the diving breathing apparatus of the present invention, the demant mechanism 42 includes a valve chamber 43 to which the medium pressure hose 12 for supplying medium pressure breathing gas is connected, and a valve body 45 for opening and closing the valve chamber 43, Since the valve body 45 is formed with the communication hole 47 which communicates with the valve chamber 43 and supplies low-pressure breathing gas, only one medium-pressure hose 12 is used to provide two types of low-pressure and medium-pressure breathing gas. Can be supplied. Therefore, the structure is simple, the device is easily assembled, and the workability is good.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention relates to a diving respirator used in water, in particular, a semi-closed diving respirator that uses exhaled breath that circulates in a breathing circuit, and a closed diving respirator that uses only respiration gas of a respirator gas cylinder. Respiratory equipment.

[0002]

[Prior art]

 For example, a semi-closed breathing apparatus is generally equipped with a breathing bag, a valve unit, a canister (carbon dioxide adsorbing device) and a breathing gas cylinder to remove carbon dioxide gas from the breathing air circulating in the breathing circuit and It is configured to use exhaled breath while replenishing breathing gas quantitatively.

In a conventional semi-closed breathing apparatus of this type, Japanese Patent Laid-Open Nos. Hei 5-162685 and Hei 5-162686 disclose breathing gas from a breathing gas cylinder to a breathing bag of a breathing circuit. There is disclosed a configuration in which a purging mechanism (demant mechanism) for purging the breathing gas from the breathing gas cylinder to the mouthpiece is provided if necessary.

The pressure of the breathing gas replenished to the breathing circuit needs to be substantially equal to the pressure of the breathing circuit (hereinafter referred to as low pressure), and when purging the breathing gas, a higher pressure (below) is used. Hereinafter, referred to as medium pressure) is required.

Therefore, conventionally, since the pressure of the breathing air replenished to the breathing circuit is different from the pressure for the demant mechanism, it is necessary to provide a hose of two types of pressure, low pressure and medium pressure, from the breathing gas cylinder. .

[0006]

[Problems to be solved by the device]

 However, providing two types of hoses for low pressure and medium pressure complicates the structure and also complicates assembling the diving breathing apparatus.

Therefore, an object of the present invention is to provide a diving breathing device which has a simple structure and is easy to assemble.

[0008]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a low-pressure breathing gas equal to the internal pressure of the breathing gas cylinder to the breathing circuit, while the demant mechanism allows the breathing gas cylinder to increase the pressure to a level higher than that of the breathing circuit. In a diving breathing apparatus that supplies pressurized breathing gas to a breathing circuit, the demant mechanism includes a valve chamber to which a hose for medium-pressure breathing gas is connected, and a valve body that opens and closes the valve chamber. Is characterized in that a communication hole is formed which communicates with the valve chamber and supplies low-pressure breathing gas.

[0009]

[Action]

 In the breathing apparatus for diving of the present invention, the medium-pressure breathing gas is supplied from the medium-pressure breathing gas hose to the valve chamber, is diffused into the breathing circuit 8 through the communication hole of the valve body, and becomes low pressure, Low-pressure breathing gas is constantly supplied into the breathing circuit.

On the other hand, when it is desired to purge into the breathing circuit as needed, the valve body is opened and the medium-pressure breathing gas is introduced into the breathing circuit from the valve chamber as it is.

Therefore, in the present invention, since only one medium pressure hose can supply two types of low-pressure and medium-pressure breathing gas, the structure is simple and the device is easy to assemble.

[0012]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3 of the accompanying drawings.

As shown in FIG. 1, a semi-closed breathing apparatus 1 according to an embodiment of the present invention generally comprises a breathing bag 3, a canister (carbon dioxide adsorbing device) 5, a breathing gas cylinder 7, and a mouthpiece 9. In the case of exhaust, the exhaled breath exhaled from the mouthpiece 9 is supplied to the breathing bag 3 through the exhaust pipe 4 and the inflow hole 6, and in the case of inhalation, in the breathing circuit Breathing air is supplied to the mouthpiece 9 from the outflow hole 8 of the breathing bag 3, the canister 5, and the intake pipe 10.

The intake pipe 10 and the exhaust pipe 4 connected to the mouthpiece 9 have a double pipe structure in which the intake pipe 10 is the inner side and the outer side is surrounded by the exhaust pipe 4, and the appearance of the entire apparatus is shown. It does not spoil the performance and simplifies the overall configuration of the device.

The canister 5 is connected to the breathing bag 3 via a pipe 15, and the above-mentioned intake pipe 10 is connected to the front end side of the canister 5.

A cylindrical adsorbent cartridge 16 filled with a carbon dioxide adsorbent is housed in a case 17 of the canister 5 so that respiratory air can be reused. A drain valve 20 that allows passage of water that has entered through the intake pipe 10 or the like is provided in the respiratory air inflow passage 5a of the canister 5. On the other hand, the outflow passage 5b is provided with an intrusion prevention valve 22 for preventing intrusion of water into the outflow passage 5b. Reference numeral 26 is a valve for forgetting to insert the adsorbent cartridge 16 that closes the inflow / outflow passage 5b when the adsorbent cartridge 16 is forgotten to be inserted.

The breathing bag 3 has a double bag structure including a bag body 29 and an inner breathing bag 27. The bag body 29 is formed of an elastic material such as rubber in a bellows shape, and expands and contracts in the direction indicated by an arrow A in FIG.

The bag body 29 is provided on one side thereof with a valve unit 30 for discharging the respiratory air in the bag body 29. When the bag body 29 collects a predetermined amount or more of respiratory air, Is designed to be discharged.

The mouthpiece 9 includes an intake valve 11 and an exhaust valve 13, and the intake valve 11 and the exhaust valve 13 are check valves, respectively. In the case of intake, only the intake valve 11 is opened and the exhaust gas is exhausted. In this case, only the exhaust valve 13 is opened. A diaphragm 33 is arranged on one side of the casing 31 of the mouthpiece 9, and the diaphragm 33 is deformed according to the internal pressure in the casing 31, and the exhaust valve 13 is activated by the deformation of the diaphragm 33. , Is an off valve.

A flexible intake valve body 11 made of a flexible material is provided at an intake port to which the intake pipe 10 is connected, and the flexible intake valve body 11 is provided in a casing 31. It deforms according to the internal pressure and opens the intake port.

In addition, the casing 31 is provided with a demant mechanism 42 for supplying, to the mouthpiece, a medium-pressure breathing gas having a pressure higher than the internal pressure of the breathing circuit from the breathing gas cylinder, if necessary. As shown in FIGS. 2 and 3, the demant mechanism 42 includes a medium pressure hose 12 into which a medium pressure breathing gas is introduced from the breathing gas cylinder 7, and a valve chamber 43 to which the medium pressure hose 12 is connected. The valve body 45 is configured to open and close the valve chamber 43, and the valve body 45 is formed with a communication hole 47 that connects the valve chamber 43 and the mouthpiece 9.

A valve seat 49 is further formed in the valve chamber 43, and a spring 51 for urging the valve body 45 is provided in the valve seat 49. The tip portion 45a of the valve body 45 is projectingly provided in the mouthpiece 9, and the one end portion of the lever 39 connected to the diaphragm 33 is connected to the tip portion 45a. The tip of the body 45 is displaced.

Further, the casing 31 is provided with a drain valve 41 for discharging water that has entered the casing. The drain valve 41 is composed of a drain valve body that sits at the drain port and closes the drain port, and a coil spring that urges the valve body, and presses the valve body against the biasing force of the coil spring. By doing so, the drain port is opened.

Next, the operation of this embodiment will be described.

When the user holds the mouthpiece 9 and exhausts air, the intake valve 11 of the mouthpiece 9 closes, the exhaust valve 13 opens, and the exhaust gas flows into the breathing bag 3 through the exhaust pipe 4. . Then, when the user inhales, the mouthpiece 9 opens the intake valve 11 and closes the exhaust valve 13 to contract the breathing bag 3 and the breathing air in the bag body 3 flows into the canister 5 from the outflow hole 8. It In the case of inhalation, the respiratory air in the breathing circuit flows into the canister 5 from the outflow hole 8 of the breathing bag 3, where the carbon dioxide in the respiratory air is adsorbed and passes through the inspiratory tube 10 to the mouthpiece 9 Is supplied to.

On the other hand, from the breathing gas cylinder 7, there is a medium pressure breathing air from the medium pressure hose 12, for example, a breathing air having a pressure higher than the ambient pressure (internal pressure of the breathing circuit) by 10 to 12 (Kg / cm ² ). It is constantly supplied to the mechanism 42. In the demant mechanism 42, the valve element 45 is urged by the spring 51 and seated on the valve seat 49, and the breathing air of medium pressure is ejected into the mouthpiece 9 through the communication hole 47. The exhaled breath air is supplied at a pressure substantially equal to the internal pressure in the breathing circuit.

Therefore, in the semi-closed breathing apparatus according to this embodiment, low-pressure breathing gas is constantly replenished in the breathing circuit while the demant mechanism 42 is closed.

When the pressure in the mouthpiece 9 drops, the demant mechanism opens and the breathing gas is purged.

That is, when the pressure inside the mouthpiece is reduced and the diaphragm 33 is deformed inside the mouthpiece 9, the lever 39 is displaced as shown by the chain double-dashed line in FIG. The tip end portion 45a of the valve body 45 connected to is pushed in a direction intersecting the biasing direction of the spring 51 to displace the valve body 45. As a result, part of the valve element 45 separates from the valve seat 49, and the inside of the valve chamber 43 is purged with medium-pressure breathed air.

On the other hand, when assembling the semi-closed breathing apparatus, it is necessary to connect only the intermediate pressure hose 12 from the breathing gas cylinder 7 to the demant mechanism, so that it is necessary to assemble two hoses of the intermediate pressure hose and the low pressure hose. Compared with the conventional semi-closed breathing apparatus, it is easier to assemble and has good workability.

According to the semi-closed breathing apparatus according to the present embodiment, it is possible to supplement the respiratory air from the respiratory gas cylinder 7 into the respiratory circuit and to supply the respiratory air for purging only by the demant mechanism 42. Moreover, since the communication hole 47 is formed in the valve body 45 of the demant mechanism 42, the demant mechanism has two kinds of functions, so that the structure of the entire apparatus can be simplified.

The present invention is not limited to the above-mentioned embodiments, and can be variously modified without departing from the gist of the present invention.

The demant function 42 is not limited to being provided in the mouthpiece 9, and the same effect can be obtained by being provided in another place such as the breathing bag 3 and the inspiratory tube 10 within the breathing circuit.

Further, the opening and closing of the valve element 45 for supplying the medium-pressure breathing gas is not limited to the diaphragm 33, and the same effect can be obtained by manual operation or the like.

[0035]

[Effect of device]

 In the breathing apparatus for diving of the present invention, the demant mechanism includes a valve chamber to which a medium-pressure hose to which medium-pressure breathing gas is supplied is connected, and a valve body that opens and closes the valve chamber. Since a communication hole for communicating low-pressure breathing gas is formed so as to communicate with the low-pressure breathing gas, only one medium-pressure hose can supply two types of low-pressure and medium-pressure breathing gas. Therefore, the structure is simple, the device is easily assembled, and the workability is good.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a semi-closed breathing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mouthpiece shown in FIG.

FIG. 3 is a schematic diagram of the demant mechanism shown in FIG.

[Explanation of symbols]

 1 Semi-closed breathing apparatus 7 Breathing gas cylinder 12 Medium pressure hose 42 Demant mechanism 43 Valve chamber 45 Valve body 47 Communication hole

Claims (1)

[Scope of utility model registration request] 1. A low-pressure breathing gas equal to the internal pressure of the breathing gas cylinder is supplied to the breathing circuit, while a medium pressure breathing gas having a pressure higher than the internal pressure of the breathing circuit is supplied from the breathing gas cylinder to the breathing circuit as needed by a demant mechanism. In the breathing apparatus for diving, the demant mechanism includes a valve chamber to which a hose for medium-pressure breathing gas is connected, and a valve body that opens and closes the valve chamber, and the valve body communicates with the valve chamber. A breathing apparatus for diving, characterized in that a communication hole for supplying low-pressure breathing gas is formed.