JPH0774031B2 - Breathing control device for pressure-resistant diving suit - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a diving device for diving underwater, in which an operator breathes in an ultra-narrow closed space of a pressure-resistant diving suit in which the inside is at atmospheric pressure. Respiratory control device for maintaining

[Prior Art] A normal diving system checks the physiological ability of the passenger to greatly limit the occupant. However, the diving system in which the inside is maintained at atmospheric pressure allows the passenger to board the diving system. After that, until the passenger dives, returns to the surface of the water, and exits the diving system, the atmospheric pressure environment is maintained for the passenger, so no special diving ability is required for the passenger, and anyone can become a passenger. It has a big merit.

In a conventional atmospheric diving system, the number of pilots is large and the boarding space is wide.Oxygen consumption and carbon dioxide production due to the breathing of pilots are the same as those used in submarines. The purpose was achieved by the method.

However, in an ultra-narrow closed space such as a pressure-resistant diving suit whose atmospheric pressure will appear in the future, the pilot's boarding space is narrow, and a boarding space of 100l or less is expected excluding the pilot's volume. Therefore, in the conventional method of constantly releasing oxygen at a constant flow rate, the internal pressure of the pressure-resistant diving suit rises and the degree of work of the operator (at rest, light work, medium work, heavy work) The amount of oxygen supply could not be controlled according to the above.

[Problems to be Solved by the Invention] In a conventional diving apparatus under atmospheric pressure, the boarding space is wide (for example, 4500 l and 1500 l / person for 3 passengers), and a constant flow rate of oxygen is supplied into the device, so that the oxygen in the device is reduced. There was no problem with the method of measuring the concentration and pressure and discharging the excess or deficiency to the outside of the device or supplying it to the inside of the device, but in the passenger space of 100 l or less, there is no quick accuracy control, and a new method is used. There is a demand for a method of supplying oxygen according to the degree of work of the operator (rest, light work, middle work, heavy work) without increasing the internal pressure of the boarding space.

In addition, as for the diving device under atmospheric pressure, it is general to use an external pressure container whose surrounding water pressure is higher than the internal pressure of the diving device.If the internal pressure of the diving device is slightly high, the external pressure container will be used. The waterproof function of the seal structure, such as the unique lid, is impaired, and if you are on the water surface for a long time as in an emergency, there will be inundation troubles.

The present invention is to solve the above problems, and provides a breathing control apparatus for a pressure resistant diving suit, which makes it possible to supply oxygen according to the degree of work of the operator in a timely manner with the atmospheric pressure maintained in a simple configuration. The purpose is to do.

[Means for Solving Problems] Therefore, the breathing control apparatus for a pressure-resistant diving suit of the present invention comprises a pressure-resistant diving suit whose inside is maintained at atmospheric pressure, and a high-pressure oxygen cylinder attached to the outside of the pressure-resistant diving suit. An oxygen supply control device that is mounted inside the pressure-resistant diving suit and supplies oxygen from a high-pressure oxygen cylinder into the pressure-resistant diving suit, and a carbon dioxide absorption device that absorbs carbon dioxide gas in the pressure-resistant diving suit,
Further, the oxygen supply control device, a valve housing having a passage and a control chamber, a diaphragm or bellows for partitioning the control chamber into a communication space for clothes and a closed space, one side fixed to the diaphragm or bellows, the other side is the A control valve provided to open and close the passage and an opening / closing valve connected to the closed space, and the closed space can be maintained at atmospheric pressure by closing the opening / closing valve. It is a thing. This atmospheric pressure closed space is
This is done by opening and closing the on-off valve that opens and closes the enclosed space when boarding.

[Operation] In the present invention, if the pressure in the pressure-resistant diving suit decreases,
The diaphragm or bellows having an internal pressure sealed space under atmospheric pressure (atmosphere during boarding) expands due to the pressure drop in the clothes, and the control valve of the oxygen supply control device moves in the direction of opening the passage in conjunction with it, Oxygen can be supplied to the clothes. When oxygen is supplied to the clothes, the clothes pressure rises according to the oxygen supply flow rate, and when the atmospheric pressure is reached, the diaphragm or bellows reaches equilibrium, and the control valve of the oxygen supply control device is closed to close the oxygen in the clothes. Supply is stopped.

Therefore, the oxygen in the clothes is consumed according to the work load of the operator, and the carbon dioxide gas produced from the body is adsorbed by the carbon dioxide absorption device 3, whereby the clothes pressure and the oxygen concentration are 1: 1. Although decreasing under control, the device of the present invention can increase the oxygen supply in response to a decrease in pressure in the diving suit.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a breathing control apparatus for pressure-resistant diving suits of the present invention, and FIG. 2 is a sectional view showing an embodiment of the breathing control apparatus for pressure-resistant diving suits of the present invention.

In the present invention, for example, as shown in FIG. 1, a high pressure oxygen cylinder 2, a carbon dioxide gas absorbing device (scrubber) 3, a carbon dioxide gas absorbing device 3 and the inside of the pressure resistant diving suit 1 are connected to the outside of the pressure resistant diving suit 1. A suction duct 4 and a discharge duct 5 are attached, and a power supply battery (not shown) for operating the carbon dioxide absorption device 3 is attached.

An oxygen supply control device 6 that controls the oxygen supply from the high-pressure oxygen cylinder 2 is attached inside the pressure-resistant diving suit 1. Further, on the front surface of the pressure-resistant diving suit 1, an observation dome 8 for the operator 7 to observe the outside and a manipulator 9 for the operator to work are further provided, and the oxygen state in the pressure-resistant diving suit 1 is further provided. A pressurizing indicator 10 and an oxygen concentration indicator 11 for displaying are provided.

FIG. 2 is a sectional view showing the details of the oxygen supply control device 6. The oxygen supply control device 6 includes a valve housing 27 having an inlet 12, a passage 25, an outlet 13 and a control chamber 26, and a control chamber.
It comprises a diaphragm or bellows 19 which divides the inside into a communication space 20 'in the clothes and a closed space 20, and a control valve 15 which is fixed to the diaphragm or bellows 19 on one side and opens and closes the passage 25 on the other side. One side of the control valve 15 is supported by a spring 16 and the other side is fixed to a diaphragm or bellows 19 via a spindle 17.

Therefore, due to the pressure difference between the closed space 20 formed by the diaphragm 19 and the space 20 'facing it, the control valve 15
Slides up and down, allowing the amount of oxygen released to be adjusted. The closed space 20 can communicate with an external pressure via an opening / closing valve 21, and thus the closed space 20 can be maintained at an atmospheric pressure state. Further, the suction port 12 is connected to the high pressure oxygen cylinder 2 via the on-off valve 22, the pressure reducing valve 23 and the on-off valve 24.
It is connected to the.

The operation will be described. When the operator boards the pressure-resistant diving suit 1 and closes the pressure-resistant lid (not shown), the on-off valve 21 attached to the base of the pressure-resistant lid goes from the open state to the closed state. Therefore, the closed space 20 is in the atmospheric pressure state.

Immediately after the pilot boarded, air filled with approximately 21% oxygen and 79% nitrogen filled the dive suit, but the breathing of the pilot gradually consumed acidity (e.g. Assuming that the amount is 1 / min for light work, carbon dioxide gas is produced instead (although it is consumed in the body,
It is assumed to be 1 / min, which is equivalent to the oxygen consumption). The carbon dioxide gas is adsorbed by the breathing agent (soda soap or the like) in the carbon dioxide breathing apparatus 3.

The pressure inside the clothes (atmospheric pressure 1013mb) decreases due to the adsorption of carbon dioxide and the consumption of oxygen in the body. For example, if the internal volume of clothes (excluding the operator's volume) is 50 liters, one minute later, one oxygen will be consumed, so the internal pressure will be 1/50 ×
100 = 2% decrease to 993mb, and the oxygen concentration at this time is
It will be 19.4%. Furthermore, after 3 minutes, the internal pressure of clothes decreased by 6% (3/50 × 100 =) from the time of boarding, and decreased to 952mb.
The oxygen concentration is 16%, approaching the state of oxygen deficiency.

As described above, oxygen in the clothes is consumed according to the amount of work done by the operator, and the carbon dioxide gas produced from the body is adsorbed by the carbon dioxide absorption device 3, whereby the clothes pressure and the oxygen concentration are 1: 1. However, with the device of the present invention, it is possible to increase the oxygen supply amount in accordance with the decrease in the pressure in the diving suit.

That is, if the pressure in the dive suit decreases, the diaphragm or bellows 19 having the internal pressure sealed space 20 in the atmospheric pressure state (atmosphere during boarding) expands due to the decrease in pressure in the suit,
In conjunction with this, the control valve 15 moves in the direction of opening the passage against the spring 16 via the spindle 17, so that oxygen can be supplied into the clothes. When oxygen is supplied into the clothes, the clothes pressure (eg 952mb) rises according to the oxygen supply flow rate, and when it reaches 1013mb under atmospheric pressure, the diaphragm or bellows 19 reaches equilibrium, and the oxygen supply controller 6 controls The valve 15 is closed and the oxygen supply in the clothes is stopped.

Therefore, oxygen is always supplied according to the work amount (oxygen consumption amount) of the operator, and no extra oxygen is supplied, so that the pressure inside the clothes is kept at the atmospheric pressure which is the atmospheric pressure when boarding.

[Effects of the Invention] As described above, according to the present invention, oxygen is supplied mechanically and reliably according to the amount of work of the operator, and excess oxygen is not supplied, and the pressure inside the diving suit is boarded. The atmospheric pressure, which is the atmospheric pressure at the time, can be maintained. Therefore, until the pilot rides in the pressure-resistant diving suit, dives, returns to the surface of the water, and exits from the diving suit, the atmospheric pressure environment is maintained for the pilot, and the pilot has special diving ability. Has the effect that is not required. Further, it is possible to solve the problem of inundation trouble that occurs when the user is floating on the water surface for a long time as in an emergency.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a breathing control apparatus for pressure-resistant diving suits of the present invention, and FIG. 2 is a sectional view showing an embodiment of the breathing control apparatus for pressure-resistant diving suits of the present invention. 1 ... Pressure diving suit, 2 ... High pressure oxygen cylinder, 3 ... Carbon dioxide absorption device, 6 ... Oxygen supply control device, 12 ... Inlet port, 13 ... Outlet port, 15 ... Control valve, 16 ... …spring,
17 …… spindle, 19 …… diaphragm or bellows, 20 …… closed space, 21 …… opening / closing valve.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Aoki ▲ Iku ▼ 2-15 Natsushima Town, Yokosuka City, Kanagawa Prefectural Marine Science and Technology Center (56) References -46615 (JP, B2)

Claims (1)

[Claims] 1. A pressure-resistant diving suit whose inside is maintained at atmospheric pressure, a high-pressure oxygen cylinder attached to the outside of the pressure-resistant diving suit, and a pressure resistant oxygen from a high-pressure oxygen cylinder attached to the inside of the pressure-resistant diving suit. An oxygen supply control device for supplying into the diving suit, and a carbon dioxide absorption device for absorbing carbon dioxide gas in the pressure resistant diving suit, wherein the oxygen supply control device further includes a valve housing having a passage and a control chamber; A diaphragm or bellows that divides the control chamber into a communication space for clothes and a closed space, a control valve having one side fixed to the diaphragm or bellows and the other side capable of opening and closing the passage, and an opening / closing connected to the closed space A breathing control apparatus for pressure-resistant diving suits, comprising a valve, and the closed space can be maintained at atmospheric pressure by closing the on-off valve.