JPH04232192A - Differential pressure control device - Google Patents

Abstract

PURPOSE:To reduce weight of a hull construction and cost by keeping a pressure inside the hull at approximately the same as a pressure outside the hull even when water pressure on the outside of the hull of a small submarine, etc., is varied with a submerging depth. CONSTITUTION:This device is composed of an exhaust amount setting valve 2, an automatic air supply valve 4 and an automatic exhaust valve 6. The automatic air supply valve 4 is automatically opened when an external environmental pressure becomes higher than an internal pressure, and closed automatically when the internal pressure becomes higher than the external environmental pressure. Also the automatic exhaust valve 6 is automatically closed when the external environmental pressure becomes higher than the internal pressure, and opened when the internal pressure becomes higher than the external environmental pressure.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a differential pressure regulating device for a small submersible boat used for underwater excursions such as marine sports and marine leisure.

0002

2. Description of the Related Art For example, conventional small submersible boats are generally designed to maintain the interior of the boat at approximately atmospheric pressure.

[0003] When the above-mentioned submersible boat or the like goes underwater, the water pressure outside the hull increases by approximately 1 kg/cm2 for every 10 m of diving depth.

[0004] That is, as the diving depth increases, the pressure difference between the inside and outside of the hull increases, so in conventional submersible boats such as those described above, the hull must have sufficient strength to withstand this large pressure difference.

[0005] As a result, the weight increases due to structural reinforcement to obtain the necessary strength, which makes transportation and other handling troublesome, and it also becomes more expensive, making it difficult to make it into an inexpensive product that can be purchased by the general public. There were problems such as.

[0006] Therefore, when the water pressure outside the hull changes depending on the diving depth, it is possible to maintain the air pressure inside the hull at approximately the same pressure (specifically, slightly higher) as the water pressure outside the hull. Conceivable.

[0007] That is, by controlling the air pressure inside the hull to approximately the same pressure as the water pressure outside the hull, the hull structure can be made lighter and cheaper at the same time, and furthermore, transportation and other handling become easier. It is something.

[0008]

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, the present invention has a simple structure particularly suitable for automatically controlling the pressure inside the hull to approximately the same pressure as the water pressure outside the hull during diving. The purpose of the present invention is to provide a differential pressure regulating device.

[0009] As a method of controlling the air pressure inside the hull to almost the same pressure as the water pressure outside the hull during diving, the water pressure is detected using electronic equipment, and then a predetermined pressure of air (10
Although it is conceivable to electrically control the supply of high-pressure air that has been reduced to about atmospheric pressure, the present invention makes it possible to easily automatically control the air pressure inside the hull using a differential pressure adjustment device with a simple mechanical structure. , which is intended to be offered as a low-cost product.

[0010] Furthermore, as a specific method for controlling the air pressure inside the hull to almost the same pressure as the water pressure outside the hull during diving, air at a predetermined pressure is always supplied from a very small orifice inside the hull, and the pressure is controlled to be equal to the external water pressure. There is a related method to exhaust excess air.

However, with this method, it is difficult to meet the air requirements of the crew during diving. In other words, if the air requirement for one crew member during diving is approximately 20 liters/min at 1 atm, then at 2 atm (depth 10
m), the required amount of air is doubled to about 40 liters/minute, but in the conventional method described above, air is supplied from a very small orifice to about 20 liters/minute, so the amount of air required for the crew following the dive is reduced. It is difficult to supply air, and it is necessary to prepare another dedicated air supply device.

[0012] This is the same in the case of rapid diving,
If the pressure rise inside the hull does not follow the diving speed, the hull may be deformed or crushed, which is dangerous.

In view of the above-mentioned circumstances, the present invention is applied to a small submersible, for example, by constantly discharging a certain amount of air inside the hull and continuously supplying the necessary amount of air so that the pressure inside the hull is slightly higher than the external water pressure. It is configured so that it can be started or stopped.

[0014]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a displacement setting valve, which is automatically opened when the external environmental pressure is higher than the internal pressure, and which is automatically opened when the internal pressure is higher than the external environmental pressure. The system consists of an automatic air supply valve that closes automatically when the external environmental pressure is higher than the internal pressure, and an automatic exhaust valve that automatically closes when the external environmental pressure is higher than the internal pressure and automatically opens when the internal pressure becomes higher than the external environmental pressure. .

[0015]

[Operation] When the present invention is used in a small submersible, for example, the displacement setting valve (2) is opened from the beginning, and exhaust is performed at about 20 liters/minute.

High-pressure air reduced to about 10 atmospheres is supplied from the air supply port (7), and the chamber pressure is adjusted to be maintained slightly higher than the pressure outside the hull.

[0017] When the room pressure rises in this state, the automatic air supply valve (4) moves upward in the drawing and opens the air supply port (7).
is closed and the air supply is cut off.

Furthermore, if there is a large difference between the indoor pressure and the external pressure of the boat, or if there is a sudden ascent, the automatic exhaust valve (6)
moves downward in the drawing, the exhaust port (8) is opened, exhaust is carried out, and the pressure in the room and the pressure outside the hull are almost balanced.

At the same time, the automatic air supply valve (4) returns, the air supply port (7) opens, and air supply resumes. Next, when the water pressure outside the hull increases as the boat dives, the water pressure opens the automatic air supply valve (4), and air is supplied until the chamber pressure is almost balanced with the water pressure outside the hull.

For example, even at a depth of 10 m under 2 atmospheres, the exhaust volume setting valve (2) pumps out about 20 liters/minute, but in reality, the density is twice as high as above water. This means that the exhaust rate is close to approximately 40 liters per minute, and air can be supplied so that the chamber pressure is maintained slightly higher than the pressure outside the hull.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to a small submersible will be described below in detail with reference to the drawings.

FIG. 1 shows various devices necessary for a small submersible,
For example, a longitudinal cross-sectional view of the hull (A) is shown in which the compressed air cylinder, ballast tank, screw, elevator, power battery, etc. are omitted and the differential pressure regulating device of the present invention is exaggerated.

In the figure, (1) is the inside of the hull, that is, the crew space (hereinafter simply referred to as a room).

[0024] In the present invention, a normally open exhaust setting valve (2) having a metering needle valve (14) is provided as an exhaust setting valve in the upper part of the chamber (1). Namely, there is a diaphragm type automatic air supply valve (4) which is opened by a spring (3) and water pressure (P) when the water pressure rises and closed when the pressure in the chamber (1), that is, the internal pressure rises, and a spring (5) which is opened at all times and when the water pressure rises. ) and water pressure (P),
A diaphragm type automatic exhaust valve (6) is provided which opens when the room pressure rises.

In the figure, (7) is an air supply port through which air whose pressure has been reduced to about 10 atmospheres is supplied from a compressed air cylinder via a pressure reducing valve (not shown), and (8) is an exhaust port. To explain the details of the automatic air supply valve (4) and the automatic exhaust valve (6), diaphragms (9) are provided at appropriate intervals.
), (10) is between the outside of the hull (A) and the through hole (1
1), and the respective diaphragms (9), (10) are connected to springs (3),
(5) It is configured to move in opposite directions when water pressure (P) and water pressure (P) are applied.

[0026]The one diaphragm (9)
The automatic air supply valve (4) connected to the air supply port (
7) is opened, and the automatic exhaust valve (6) connected to the other diaphragm (10) is normally connected to the exhaust port (8).
is configured as if it were closed. In addition, in the figure (12
) is a support plate for the springs (3) and (5) provided between the two diaphragms (9) and (10), and is provided with an appropriate number of holes (13) so that both diaphragms (9) and and (10) side are connected.

In the above configuration, the displacement setting valve (2) is set so that the internal pressure is always slightly higher than the external environmental pressure.
It is preferable to adjust the metering needle valve (14) in advance, since the room will always be effectively ventilated and the differential pressure regulator will operate reliably.

[0028]

According to the present invention, it is possible to provide a differential pressure regulating device that automatically maintains the internal pressure at substantially the same pressure as the external environmental pressure at a low cost.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a main part of the present invention.

[Explanation of symbols]

2 Displacement setting valve 4 Automatic air supply valve 6 Automatic exhaust valve

Claims (1)

[Claims] [Claim 1] An exhaust volume setting valve (2), an automatic air supply valve (4) that is automatically opened when the external environmental pressure is higher than the internal pressure, and automatically closed when the internal pressure is higher than the external environmental pressure. A differential pressure regulating device comprising an automatic exhaust valve (6) that is automatically closed when the external environmental pressure is higher than the internal pressure and automatically opened when the internal pressure is higher than the external environmental pressure.