JPH0738883B2 - Mouthpiece unit in diving breathing apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a breathing apparatus for diving using a semi-closed breathing apparatus or a closed breathing apparatus, in which a mouse having an improved drainage mechanism for draining water that has entered the mouthpiece unit. Regarding the peace unit.

[0002]

2. Description of the Related Art Diving breathing apparatus are roughly classified into an open breathing apparatus and a semi-closed breathing apparatus or a closed breathing apparatus. The open breathing apparatus uses compressed air as a breathing gas source, and breathes breathing gas that has been breathed once into the water.If it is used for long-term diving, the capacity of the cylinder must be increased. However, there is a problem that the weight is increased.

On the other hand, the semi-closed breathing apparatus is equipped with a breathing bag, an exhaust valve, a carbon dioxide adsorbing device and a breathing gas cylinder to remove carbon dioxide from the breathing air circulating in the breathing circuit.
A small amount of breathing gas is supplied to the air from which carbon dioxide has been removed, and excess breathing air is discharged.
Further, the closed-type breathing apparatus has the same structure as the semi-closed-type breathing apparatus, but does not have an exhaust valve so that excess breath air is not discharged to the outside.

The above-mentioned semi-closed type and closed type breathing apparatus enable diving at a high depth for a long time, and
It has an advantage that the decompression time can be shortened.

[0005]

In the semi-closed diving breathing apparatus, the mouthpiece is eaten to inhale, but the pressure in the circuit is the same when inhaling. Therefore, water generally enters the mouthpiece unit. When this water enters the carbon dioxide gas adsorbing device from the mouthpiece unit, there are problems that strong alkaline water is generated and the carbon dioxide gas adsorbing function is deteriorated.

Therefore, it is necessary to drain the water that has entered the mouthpiece unit, but in the conventional method, the check valve provided in the mouthpiece unit is used by the diver to exhale strongly and breathe. I was draining the water.
This water draining operation is difficult for the diver and there is a problem in that extra physical strength is used for this operation.

The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to supply the breathing gas in the cylinder into the mouthpiece unit by a simple operation and to generate the mouse by the pressure of the breathing gas. (EN) A mouthpiece unit for a diving breathing apparatus adapted to drain water accumulated in the piece unit.

[0008]

The mouthpiece unit in the breathing apparatus for diving of the present invention is intended to achieve the above-mentioned object, and the means is to provide a breathing gas from a breathing gas source in a breathing chamber of the mouthpiece unit. For supplying the air, a demand lever for constantly closing the opening of the pipe, and an actuation of the demand lever from the outside to open the opening of the pipe and the opening of the exhaust valve. A purge button and an exhaust valve provided in the mouthpiece unit and opened when the pressure in the breathing chamber is increased by the breathing gas from the pipe.

[0009]

The mouthpiece unit in the diving respiration apparatus of the present invention constructed as described above has a structure in which the breathing gas from the tank is introduced into the breathing chamber of the mouthpiece unit through a pipe, and the purge button is operated when the purge button is operated. By opening the opening, the breathing gas is discharged into the breathing chamber to establish a pressurized state, and the exhaust valve provided in the breathing chamber is opened to drain the water in the breathing chamber.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the entire diving breathing apparatus including the mouthpiece unit of the present invention will be described with reference to FIG. 1. Reference numeral 1 is a substrate 1a mounted so as to be positioned on the back of a diving person, A casing composed of a cover 1b for covering,
Reference numeral 2 is a breathing gas cylinder (hereinafter, simply referred to as a cylinder) such as compressed air that is detachably attached to the substrate 1a, 3 is a breathing gas pipe (hereinafter, simply referred to as a pipe) connected to the cylinder 2, and 4 is the pipe 3 A part of the breathing gas from the cylinder 2 is branched to the metering device 5 by using a valve connected in the middle of.

The measuring device 5 includes a flexible tube 6
Is connected to the valve 4 so that the diver can see it at any time. The metering device is provided with a propeller flow meter 5a, a residual pressure gauge 5b, and a depth alarm device 5c that issues an alarm when the depth becomes too deep.

A filter 7, a regulating valve 8 for regulating the flow rate of breathing gas, and a valve 9 are connected to the pipe 3 downstream of the valve 4. The valve 9 is bifurcated, and one pipe 9a is connected to a mixing chamber A described later.
The other pipes 9b are each connected to a mouthpiece unit 23 described later. The supply of the breathing gas to the mixing chamber A is performed by pushing down the operation lever 15, and is constantly supplied to the mouthpiece unit 23.

Reference numeral 10 denotes a disk-shaped second substrate arranged in proximity to the substrate 1a of the casing 1, and the adjusting valve 8 and the valve 9 described above are arranged between the substrate 1a and the adjusting valve 8 and the valve 9. A lower edge of the bellows-shaped first bellows 11 is fixed to the peripheral surface of the second substrate 10, and an intermediate plate 12 is fixed to the upper edge thereof. Further, a lower edge of a second bellows 13 similar to the first bellows 11 is fixed to the intermediate plate 12, and a cover plate 14 is fixed to an upper edge of the second bellows 13.

Then, the second substrate 10 of the first bellows 11 is formed.
The space formed by the intermediate plate 12 and the intermediate plate 12 is a mixing chamber A for breathing gas and exhaust gas, and the space formed by the intermediate plate 12 and the cover plate 14 of the second bellows 13 is a clean chamber B.

The pipe 9a from the valve 9 faces the second substrate 10, and the breathing gas from the valve 9 is supplied into the mixing chamber A when the operating lever 15 is pushed down. Further, an exhaust hose 16 that connects to the mouthpiece unit 23 is connected to the second substrate 10, and further, a recess 10a that forms the drainage chamber C that is connected to the substrate 1a is formed, and the recess 10 is formed.
A drain valve 17 that normally closes the valve portion 10b with a spring 17a is formed in a.

On the lower surface of the intermediate plate 12, there is formed a ring-shaped projection 12a which comes into contact with and pushes down the operation valve 15 at the time of lowering and prevents water from entering the clean room B. The projection 12a communicates with the center thereof. A hole 12b is formed, and a carbon dioxide adsorption device 2 to be described later is formed in the communication hole 12b.
A bellows-shaped mixed gas passage pipe 18 connected to the No. 1 is attached.

Further, the intermediate plate 12 is provided with an exhaust hole 12c for exhausting the intake gas in the clean room B to the outside, and an intake hose 19 for connecting the exhaust hole 12c and the mouthpiece unit 23 to each other. A bellows-shaped intake pipe 20 to be connected is connected.

A flat carbon dioxide adsorbing device 21 for adsorbing carbon dioxide and passing only oxygen is attached to the cover plate 14, and carbon dioxide and air supplied through the communication hole 12b and the mixed gas passage pipe 18 are provided. The carbon dioxide gas is removed from the mixed gas of and and discharged into the clean room B. An upper end of a bellows-shaped pump 22 is attached to the cover plate 14, and a lower end of the pump 22 hangs at a position slightly apart from a drain hole 10c of the second substrate 10 constituting the drain chamber C.

Reference numeral 23 denotes a mouthpiece unit according to the present invention connected to the casing 1 through the exhaust pipe 16, the intake pipe 19 and the pipe 9b for allowing the intake gas to pass therethrough. Formed,
A mouthpiece 23a is formed in communication with the breathing chamber D so that a diver can eat it. Further, an exhaust valve 24 and an intake valve 25 are arranged at the portions connecting the breathing chamber D and the exhaust pipe 16 and the intake pipe 19, respectively.
Further, a known demand lever 26 is arranged at a portion where the tip of the pipe 9b faces.

The exhaust valve 24 is a mouthpiece 23a.
When the diving person exhausts more air, it opens and also the intake valve 2
5 is opened when inhaled. The demand lever 26 normally closes the pipe 9b,
When the purge button 27 is pushed against the spring force of the spring 27a, the purge button 27 comes into contact with the protrusion 27b and retracts to open the pipe 9b. It should be noted that the exhaust valve 2 is attached to the tip of the purge button 27 when the demand lever 26 is operated.
An exhaust port valve 27c for closing the opening of No. 4 is attached.

In addition, the mouthpiece unit 23 described above
On the lower surface of the
An exhaust valve 28 that closes the valve is formed, and when the valve 28 is opened by gas pressure, the water that remains in the breathing chamber D is drained.

Next, in order to explain the operation based on the above-mentioned structure, the diver mounts the casing 1 on the back side using a string or the like, and then eats the mouthpiece 23a of the mouthpiece unit 23 in his mouth. To dive. When breathing in in this state, the intake valve 25 is opened by the momentum, so that the breathing gas in the clean room B is supplied into the breathing room D through the breathing pipe 20, the intake hose 19, and the intake valve 25. It can be inhaled from the mouthpiece 23a.

When the breathing gas in the clean room B is reduced by the breathing, the breathing gas in the mixing room A is communicated with the communicating hole 1
2b, it is supplied to the carbon dioxide adsorbing device 21 via the mixed gas passage pipe 18, and is supplied to the mouthpiece unit 23 via the breathing pipe 20 in the state where the carbon dioxide gas has been removed as described above.

Further, when the amount of breathing gas in the clean room B and the mixing room A decreases, the first and second bellows 11 and 13 contract, but the contraction of the first bellows 11 causes the operating lever 15 to move by the projection 12a. When it is pushed down, the valve 9 is opened and the breathing gas from the cylinder 2 is filtered by the filter 7,
It is supplied into the mixing chamber A through the control valve 8 and the valve 9.

In this state, when the diver exhales, the exhaust valve 24 is opened, so the exhaust is exhausted from the exhaust pipe 16
Is supplied into the mixing chamber A via. Therefore, since the breath exhaled by the diver and the breathing gas from the valve 9 are supplied into the mixing chamber A, when the diver subsequently inhales, the carbon dioxide gas in the mixing chamber A is generated by the suction pressure. The air containing carbon dioxide is adsorbed on the carbon dioxide adsorption device 2 through the mixed gas passage pipe 18.
1 is supplied.

Then, the carbon dioxide gas is removed here, and only clean air is sent to the clean room B, and is supplied to the breath room D of the mouthpiece unit 23 through the breathing pipe 20 and the intake hose 19 as described above. The diver is able to inhale this air. Hereinafter, the same operation as described above is repeatedly performed.

Next, a description will be given of the operation of draining the water in the case where the diver has put water in the breathing chamber D when he / she breathes while diving. In this case, when the purge button 27 is pushed against the spring force of the spring 27a, the protrusion 27b drives the demand lever 26 to open the opening of the pipe 9b. This allows the pipe 9
The breathing gas in the tank 2 from b is the filter 7, the control valve 8,
It is supplied into the breathing chamber D via the valve 9.

On the other hand, since the exhaust valve 27c provided at the tip of the purge button 27 closes the opening of the exhaust valve 24, the diver holds the mouthpiece 23a in his mouth to prevent the air from being discharged. The pressure in the breathing chamber D rises, and when the pressure exceeds the spring force of the spring 28a of the exhaust valve 28, the valve 28 is opened and the water in the breathing chamber D is discharged into the water.

Further, when water is accumulated in the mixing chamber A for some reason, the accumulated water is automatically drained every time the diving person breathes. To explain this operation, when water enters the mixing chamber A through the exhaust pipe 16, the lower end of the pump 22 and the drain hole 10c of the second substrate 10 when the first and second bellows 11 and 13 are extended. Water enters the drainage chamber C through the gap between and.

Then, the diving person's breathing is performed, and the first and second
When the bellows 11 and 13 are contracted, the lower end of the pump 22 starts contracting while closing the drain hole 10c. When this contraction is performed, the air in the pump 22 is compressed, so the pressure in the drainage chamber C rises, and when this pressure exceeds the spring force of the spring 17a of the drainage valve 17, the valve 17
Is opened and the water in the drainage chamber C is drained into the water.

[0031]

As described above, according to the present invention, breathing gas from the tank is introduced into the breathing chamber of the mouthpiece unit through the pipe, and the opening of the pipe is opened when the purge button is operated. The gas is discharged into the breathing chamber to create a pressurized state, and the exhaust valve provided in the breathing chamber is opened to drain the water in the breathing chamber. It has the effect that draining work is much easier than the existing ones.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the entire diving breathing apparatus.

FIG. 2 is a sectional view showing a state before draining water in the mouthpiece unit of the present invention.

FIG. 3 is a cross-sectional view showing a state in which water is being drained in the above.

[Explanation of symbols]

 9b Breathing gas pipe 16 Exhaust pipe 19 Intake pipe 23 Mouthpiece unit 23a Mouthpiece 24 Exhaust valve 25 Intake valve 26 Demand valve 27 Purge button 27b Protrusion 27c Exhaust port valve 28 Exhaust valve

Claims (1)

[Claims] 1. In a mouthpiece unit connected to a diving breathing apparatus through an exhaust pipe, an intake pipe, an exhaust valve, and an intake valve, a breathing gas from a breathing gas source is supplied to a breathing chamber of the mouthpiece unit. A pipe, a demand lever for constantly closing the opening of the pipe, and a purge for closing the opening of the exhaust valve while driving the demand lever by an external operation to open the opening of the pipe. A mouthpiece unit in a breathing apparatus for diving, comprising a button and an exhaust valve provided in the mouthpiece unit and opened when a pressure in the breathing chamber is increased by a breathing gas from the pipe. .