JPH05162685A - Air bag drainage in diving breathing device - Google Patents

Abstract

PURPOSE:To prevent the generation of strong alkaline water and the lowering of carbon dioxide gas adsorbing effect due to the infiltration of water into a carbon dioxide gas adsorber by providing a pump contracted/expanded in association with the contraction/expansion of an air bag, inside the air bag, and draining water in the air bag automatically in association with the respiration of a diver. CONSTITUTION:A drain valve 17 is provided at the bottom face of an air bag having an air chamber surrounded by bellows 11, 13 contracted/expanded reacting to the respiration of a diver, and there is also provided a bellows pump 22 forming a gap in relation to a drain hole 10c for pouring water into the drain valve 17 in the expanded state of the air bag whereas brought into close contact with the drain hole 10c in the contracted state of the air bag. This pump 22 is formed in such a way as to be contracted/expanded in association with the contraction/expansion of the air bag so as to control the opening/ closing of the drain valve.

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, which uses a semi-closed breathing apparatus or a closed breathing apparatus, and breathing gas from a cylinder filled with compressed air or oxygen and breathing gas discharged by a diver. The present invention relates to a drainage device for draining water that has entered the air bag that mixes with.

[0002]

2. Description of the Related Art Diving breathing apparatus are roughly classified into an open type breathing apparatus and a semi-closed type breathing apparatus or a closed type 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.
While introducing the air from which this carbon dioxide has been removed into the air bag, a small amount of breathing gas is supplied into this air bag, and excess breath 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 deep depth for a long time, and
It has an advantage that the decompression time can be shortened.

[0005]

By the way, 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, it is common for water to enter the mouthpiece unit. When this water enters the air bag from the mouthpiece unit and enters the carbon dioxide gas adsorbing device from the air bag, strong alkaline water is generated or the carbon dioxide gas adsorbing function deteriorates. There is.

Therefore, in order to prevent the water that has entered the mouthpiece unit from entering the air bag, a water retention tank has been provided in front of the air bag or a hose that is in the middle of connecting the mouthpiece unit and the air bag has been installed. Although a stop valve was provided, it still could not sufficiently prevent the entry of water into the air bag, and therefore the above-mentioned problems occurred.

The present invention is intended to solve the above-mentioned problems, and its purpose is to provide an air bag inside
Provided is a drainage device for an air bag in a breathing apparatus for diving, which is provided with a pump that expands and contracts in accordance with the contraction and expansion of the air bag, and automatically drains the water in the air bag with the breathing of a diver. It is in the field.

[0008]

Means for Solving the Problems An air bag drainage device for a diving breathing apparatus according to the present invention is intended to achieve the above-mentioned object by means of a mouthpiece unit, an exhaust pipe and an intake pipe. In a diving breathing apparatus connected to an air bag, the air bag has an air chamber surrounded by a bellows that contracts and expands in response to breathing by a diver, and a drain valve is provided on the bottom surface of the air bag. With the provision of a bellows-like pump, a gap is formed in the drain valve for pouring water into the drain valve when the airbag is inflated, and in close contact with the drain hole when the airbag is contracted. The pump is designed to expand and contract with the expansion and contraction of the air bag.

[0009]

The drainage device for an air bag in the breathing apparatus for diving according to the present invention constructed as described above is provided on the bottom surface of the air bag having the air chamber surrounded by the bellows which contracts and expands in response to the breathing of the diver. Drain valve
Since it is released by the compressive force of the bellows-shaped pump that contracts and expands in accordance with the contraction and expansion of the air bag, the water in the air bag that flows into the drain valve is discharged to the outside every breath of the diver.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a description will be given of the whole diving breathing apparatus including the mouthpiece unit of the present invention with reference to FIG. A casing composed of a cover 1b for covering,
2 is a breathing gas cylinder such as compressed air detachably attached to the substrate 1a (hereinafter, simply referred to as a cylinder), 3 is a breathing gas pipe (hereinafter, simply referred to as a pipe) connected to the cylinder 2, 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.

This measuring device 5 comprises 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 respiratory 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. Further, 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 the vicinity of the substrate 1a of the casing 1, and the adjusting valve 8 and the valve 9 described above are arranged between the substrate 1a. The lower edge of the bellows-shaped first bellows 11 is fixed to the peripheral surface of the second substrate 10, and the intermediate plate 12 is fixed to the upper edge. 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.
A space formed by the intermediate plate 12 and the intermediate plate 12 is a mixing chamber A for breathing gas and exhaust gas, and a space formed by the intermediate plate 12 and the cover plate 14 of the second bellows 13 is a clean chamber B. Then, the above-mentioned second substrate 10 and intermediate plate 1
2, the lid plate 14 and the first and second bellows 11 and 13 form an air bag.

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. In addition, 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 abuts and pushes down the operation valve 15 when descending, and a communication hole 12b is formed in the center of the projection 12a, and A bellows-shaped mixed gas passage pipe 18 connected to a carbon dioxide adsorption device 21 described later is attached to the communication hole 12b.

Further, the intermediate plate 12 is formed with an exhaust hole 12c for discharging 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 forming the drain chamber C.

Reference numeral 22a denotes a valve seat fixed to the lower surface of the pump 22. By contacting the valve seat 10d provided around the drainage hole 10c, the lower surface of the pump 22 and the second substrate 10 are brought into contact. The space around the drainage hole 10c is sealed (see FIG. 2).

Reference numeral 23 is 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 passing the intake gas, and the breathing chamber D is provided at the tip portion. Formed,
A mouthpiece 23a communicating with the breathing chamber D is formed 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.
More divers open when exhausted, and 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. 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 this valve 28 is opened, the water that remains in the breathing chamber D is drained (see FIGS. 3 and 4).

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, the gas 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 is 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, 13 contract, but the contraction of the first bellows 11 causes the operation lever 15 to move by the projection 12a. 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 next inhales, the carbon dioxide gas in the mixing chamber A is generated by the suction pressure. The air containing carbon dioxide is adsorbed through the mixed gas passage pipe 18 to the carbon dioxide adsorption device 2
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 this water when the diving person has put water into the breathing chamber D of the mouthpiece unit 23 when he or she breathes. In this case, when the purge button 27 is pushed against the spring force of the spring 27a, the projection 27b drives the demand lever 26 to open the opening of the pipe 9b. As a result, the breathing gas in the tank 2 is supplied from the pipe 9b into the breathing chamber D via the filter 7, the regulating valve 8 and 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 diving person prevents the air from being exhausted from the mouthpiece 23a, so that the inside of the breathing chamber D is prevented. Pressure rises,
The pressure is the spring 28a of the exhaust valve 28.
When the spring force is exceeded, the valve 28 is opened and the water in the breathing chamber D is discharged into the water.

When water is accumulated in the mixing chamber A from the mouthpiece unit 23 or for some reason, the accumulated water is automatically drained every time the diver breathes. To explain this operation, when water enters the mixing chamber A, the first and second bellows 11,
When 13 is extended, it enters the drain chamber C through the gap between the lower end of the pump 22 and the drain hole 10c of the second substrate 10.

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 is contracted while closing the drain hole 10c. When this contraction is performed, the air in the pump 22 is compressed and the pressure in the drainage chamber C rises. 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.

[0032]

As described above, according to the present invention, a pump that expands and contracts in accordance with the contraction and expansion of the air bag is provided in the air bag, and the water in the air bag is automatically supplied with the breathing of the diver. The water in the air bag is drained at each breath, and the water in the air bag enters the carbon dioxide adsorption device to generate strong alkaline water. In addition, the carbon dioxide gas adsorption function is not deteriorated.

[Brief description of drawings]

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

FIG. 2 is a partially enlarged cross-sectional view of an airbag.

FIG. 3 is a cross-sectional view showing a state before draining water in the mouthpiece unit of the present invention.

FIG. 4 is a cross-sectional view showing a state in which water is being drained in the above.

[Explanation of symbols]

 1 Casing 2 Tank 10 2nd Substrate 10c Drainage Hole 11 1st Bellows 12 Intermediate Plate 13 2nd Bellows 14 Lid Plate 17 Drain Valve 22 Pump

Claims (1)

[Claims] 1. A breathing apparatus for diving, which is connected to an air bag through a mouthpiece unit, an exhaust pipe, and an intake pipe, wherein the air bag is surrounded by a bellows that contracts and expands in response to breathing by a diver. With a chamber, a drain valve is provided on the bottom surface of the airbag, and a gap is formed in a state where the airbag is inflated with respect to a drain hole for pouring water into the drain valve, An air bag drainage device in a breathing apparatus for diving, characterized in that a bellows-shaped pump is provided in close contact with the air bag when the air bag is in a contracted state, and the pump is contracted and expanded in accordance with the contraction and expansion of the air bag.