JP2002213613A - Water pressure resistant vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water pressure resistant vessel, superior in airtightness and water pressure resistance, which can efficiently evacuate or replace gas in the inside. SOLUTION: This water pressure resistant vessel has an exhaust port 4, having a tapered part 4a opened to the outward of a water pressure resistant vessel main unit 1 and a sidewall part 4b which continue to the tapered part 4a, a plurality of exhaust holes 5 provided in the water pressure-proof vessel main unit 1 for communicating with an exhaust port bottom part 4c, a cone- shaped part 6a, and a columnar shape part 6b, the water pressure resistant vessel is constituted by providing a cone type metal seal 6 making the cone- shaped part 6b abut to the tapered part 4a of the exhaust port 4 and a nut for press fitting which presses against the cone-like metal seal 6 in a direction of the tapered part 4a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal water-resistant vessel which needs to maintain a vacuum inside or to be filled with a specific gas, and more particularly to an exhaust port provided in the water-resistant vessel. The present invention relates to a seal structure for sealing the exhaust port.

[0002]

2. Description of the Related Art Conventionally, as in the case of an optical submarine repeater housing, an exhaust port of a metal water-resistant vessel which needs to maintain a vacuum inside or to be filled with a specific gas, and a seal of the exhaust port. The structure includes the following.

FIG. 5 is a cross-sectional view showing an example of the exhaust port structure of a metal water-resistant vessel shown in “NTT Research and Application Report, Vol. 23, No. 3 (1974) 459”.
In the drawing, 1 is a water-resistant vessel main body, 2 is a lid, 3 is a side wall,
14 is an exhaust port, 15 is a convex portion 15 on the screw portion 15a.
B is an exhaust pipe connection screw, 16 is a cap, 17 is a taper pin, 18 is a plug, and 19 is an O-ring.

The exhaust port 14 passes through the lid 2 of the watertight vessel main body 1 and the exhaust pipe connection screw 15 provided in the lid 2 in an airtight manner. Are formed.

When the inside of the watertight vessel main body 1 is evacuated or a filling gas is introduced into the inside, the female thread portion 15a of the exhaust pipe connection screw 15 provided in the watertight vessel main body 1 is provided. Connected to the exhaust pipe or the gas introduction pipe. At this time, the airtightness of the connection portion can be maintained by interposing a metal packing in the screw portion. When closing the exhaust port 14, the exhaust port 1 is closed.
4, a taper pin 17 is inserted into the taper portion 14b at an appropriate pressure, and a plug 18 is driven.
8 and the upper part of the exhaust port 14 are welded, and the cap 16 with the O-ring 19 is screwed into the threaded portion 15a to double seal. According to this method, it is possible to easily connect the exhaust pipe or the gas introduction pipe and to perform the exhaust / gas introduction with good airtightness, and to realize a seal that does not cause water leakage even under a high water pressure of 1000 atm or more. it can.

[0006]

However, in the exhaust port structure of the waterproof pressure vessel shown in FIG. 5, since the diameter of the tapered portion of the exhaust port defines the exhaust conductance, the volume of the entire waterproof pressure vessel increases. Then, there is a problem that a long time is required for the exhaust.

In addition, when the hole including the exhaust port of the waterproof pressure vessel main body is made large in order to improve the exhaust conductance, there is a problem that the water pressure resistance such as the water pressure resistance and the sealing property is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has a water pressure resistant structure having an exhaust port structure capable of obtaining a large exhaust conductance and maintaining a water pressure resistant performance. A container is provided.

[0009]

A first water-resistant container according to the present invention is a metal water-resistant container whose inside is kept in a vacuum or filled with gas and sealed, wherein An exhaust port having a tapered portion opening upward and outward from the main body and a side wall portion and a bottom portion following the tapered portion, provided in the main body of the water resistant pressure vessel, from the inside of the main body of the water resistant pressure vessel to the bottom of the exhaust port. A plurality of exhaust holes communicating with each other, a cone-shaped metal seal having a conical portion and a cylindrical portion, wherein the conical portion is in contact with a tapered portion of the exhaust port; And a pressing means for pressing the pressure.

A second waterproof pressure vessel according to the present invention is the first waterproof pressure vessel, wherein the exhaust port is formed in the main body of the waterproof pressure vessel.

A third watertight container according to the present invention is the first watertight container, wherein the exhaust port is formed in a block body different from the main body of the watertight container. The body is connected to the body of the watertight vessel.

A fourth waterproof pressure vessel according to the present invention is the same as any one of the first to third waterproof pressure vessels described above, but is provided on the columnar portion of the cone-shaped metal seal and is in contact with the side wall of the exhaust port. It has a ring.

According to a fifth aspect of the present invention, there is provided a fifth waterproof pressure vessel according to any one of the first to fourth waterproof pressure vessels, wherein the plurality of exhaust holes are formed in a block body different from the main body of the waterproof pressure vessel. The block body having the exhaust hole is inserted into a hole formed in the main body of the watertight container.

According to a sixth aspect of the present invention, there is provided a pressure-resistant container according to any one of the first to fourth pressure-resistant containers, wherein the plurality of exhaust holes are formed by binding a plurality of pipes. Is inserted into a hole formed in the main body of the waterproof pressure vessel.

According to a seventh aspect of the present invention, there is provided a gasket groove for connecting a gasket used for airtightly connecting a pipe to an exhaust port in any one of the first to sixth watertight pressure vessels. And a screw hole for connecting the pipe.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view of a main part showing a first embodiment of a water-resistant vessel according to the present invention (a) and a plan view (b) showing an exhaust port bottom 4c. In the drawing, reference numeral 1 denotes a water-resistant vessel main body, 2 denotes a lid of the water-resistant vessel main body 1, 3 denotes a cylinder of the water-resistant vessel main body 1, and 4 denotes an exhaust port. 1 has a side wall portion 4b following the tapered portion 4a opening upward and outward. Reference numeral 5 denotes an exhaust hole formed in the lid 2 of the waterproof pressure vessel main body 1, and a plurality of exhaust holes 5 communicate with the exhaust port 4. 6 is a cone-shaped seal having a conical portion 6a and a columnar portion 6b, and 7 is an O-shaped seal provided on the columnar portion 6b.
The ring 8 is a press-fit nut as a pressing means for pressing the cone-type seal 6 in the direction of the tapered portion 4a. The end of the conical portion 6a has a tapered portion 4a of the exhaust port 4 which is pressed by the press-fit nut 8 O-ring is attached to the side wall 4 of the exhaust port 4
b and seals the water-resistant container body 1. Reference numeral 9 denotes a gasket groove for connecting a pipe, and 10 denotes a screw hole for connecting a pipe. These holes are used for evacuating the inside of the watertight vessel main body 1 or for introducing gas into the watertight vessel main body 1.

In the configuration shown in FIG. 1, when evacuating the inside of the watertight vessel main body 1 or introducing gas into the inside of the watertight vessel main body 1, a metal gasket having a diameter matching the pipe connection gasket groove 9 is used. Then, a pipe having a flange having a diameter adapted to the gasket groove 9 at its tip is screwed to the water-resistant vessel main body 1 using the pipe connection screw hole 10. When the exhaust port 4 is sealed, the cone-type seal 6 and the press-fit nut 8 are inserted into the exhaust port 4 in this order, and the press-fit nut 8 is inserted while the cone-type seal 6 is press-fitted at an appropriate pressure. Tighten with an appropriate torque value.

In the configuration shown in FIG. 1, since the gasket and the screw are used, high airtightness can be maintained and the pipe can be easily connected and disconnected.

Further, since the exhaust port 4 has the tapered portion 4a which opens outward and upward of the water-resistant vessel main body 1, there is no longer a portion having a small diameter which restricts the exhaust conductance as in the prior art. The inside of the main body 1 can be evacuated with high efficiency.

Further, since the cone seal with the O-ring and the nut are used at the time of sealing the exhaust port, water leakage does not occur even under sufficiently high water pressure by the double seal by the metal seal and the O-ring. .

Further, a plurality of exhaust holes 5 communicating with the exhaust port bottom 4c are provided, and the exhaust passage is divided into a plurality of parts, so that the water pressure resistant main body 1 maintains the water pressure resistance (strength) of the exhaust hole 5 while maintaining the water pressure resistance (strength). The exhaust conductance of the portion can be improved.

For example, when the length of the exhaust hole 5 is 60 mm, a single exhaust hole having a diameter of 20 mm has an exhaust conductance of 1.152 L / sec, whereas seven exhaust holes having a diameter of 10 mm (diameter: 38 mm), the exhaust conductance is 1.191 L / sec.
% Improvement can be expected. On the other hand, the stress generated at the lower part of the exhaust hole 5 when a load equivalent to 800 atm is applied hardly changes when the diameter is 10 mm or 20 mm.
It is calculated by calculation that when the diameter is 38 mm in order to increase the exhaust conductance, the diameter becomes about 1.3 times that in the case of the diameters of 10 mm and 20 mm. That is, it is shown that a plurality of exhaust holes having a small diameter is more advantageous in strength than an exhaust hole having a single large diameter in order to increase the exhaust conductance.

In the present embodiment, it is preferable that the cross section of the exhaust hole 5 is circular in order to avoid workability or stress concentration, but it is also possible to use various cross sections such as a rectangle. The point is to adopt the size and shape in addition to the pressure resistance performance and the exhaust conductance performance of the water-resistant vessel body 1 and the ease of processing. Multiple exhaust holes 5
When the ratio of the total cross-sectional area of the exhaust hole 5 to the cross-sectional area of the exhaust port bottom portion 4c including exceeds １ ／, the strength withstand pressure performance sharply decreases.

Embodiment 2 FIG. FIG. 2 is a cross-sectional view of a principal part showing a second embodiment of a water-resistant container according to the present invention. In the drawing, the same reference numerals as those in FIG.

In this embodiment, as shown in FIG. 2, an exhaust hole block 11 having a plurality of exhaust holes 5 formed in a block is formed into a single large hole provided below the exhaust port 4. Inset welded.

When the lid 2 is large and heavy,
Opening a plurality of exhaust holes 5 in the lid 2 is inferior in workability. However, according to the present embodiment, it is sufficient to process a plurality of exhaust holes 5 in a small block body. Get better.

Embodiment 3 FIG. 3 is a cross-sectional view of a principal part showing a third embodiment of a water-resistant container according to the present invention. In the figure, the same reference numerals as those in FIG.

In the present embodiment, as shown in FIG. 3, the holes of the pipes 12 are used as the exhaust holes 5, the plurality of pipes 12 are bundled, and the bundled pipes 12 are connected to the exhaust port 4. It is fitted and welded into a single large hole at the bottom.

According to the present embodiment, since the hole of the pipe 12 is used and the hole is used as the exhaust hole 5, it is not necessary to perform a hole forming process.

Embodiment 4 FIG. 4 is a cross-sectional view of a principal part showing a fourth embodiment of a water-resistant pressure vessel according to the present invention. In the drawing, the same reference numerals as those in FIG.

In this embodiment, as shown in FIG. 4, an exhaust port block 13 in which the exhaust port 4 is formed in another block body is connected to the lid 2, and a plurality of exhaust holes provided in the lid 2 are provided. 5 communicates with the exhaust port 4.

When the lid 2 is large and heavy, for example,
Although the processing of the exhaust port 4 in the lid 2 is poor in workability, according to the present embodiment, the processing of the exhaust port 4 may be performed in a small block, so that the workability is improved.

In this embodiment, the plurality of exhaust holes 5 may be formed as an exhaust hole block or pipe as in the second or third embodiment.

[0034]

According to the first waterproof pressure vessel according to the present invention, in a metal waterproof pressure vessel in which the inside is maintained in a vacuum or filled with a specific gas and sealed, An exhaust port having a tapered portion opening upward and outward from the main body and a side wall portion and a bottom portion following the tapered portion, provided in the main body of the water resistant pressure vessel, from the inside of the main body of the water resistant pressure vessel to the bottom of the exhaust port. A plurality of exhaust holes communicating with each other, a cone-shaped metal seal having a conical portion and a cylindrical portion, wherein the conical portion is in contact with a tapered portion of the exhaust port; Since there is provided a pressing means for pressing, the portion having a small diameter that restricts the exhaust conductance as in the related art is eliminated, and the inside of the water pressure resistant container main body can be evacuated with high efficiency.

The water pressure resistance (strength) of the water pressure resistant container body
, While improving the exhaust conductance.

According to the second pressure-resistant container according to the present invention, since the exhaust port is formed in the main body of the pressure-resistant container, a portion projecting from the main body of the pressure-resistant container is eliminated or reduced. As a result, the surface of the main body of the waterproof pressure vessel can be effectively used.

According to the third watertight container according to the present invention, the exhaust port is formed in a block body different from the main body of the watertight container, and the block body provided with the exhaust port is connected to the main body of the watertight container. The workability in processing the exhaust port is improved.

According to the fourth pressure-resistant container according to the present invention, since the O-ring is provided on the cylindrical portion of the cone-shaped metal seal and is in contact with the side wall of the exhaust port,
Due to the double seal by the cone-shaped metal seal and the O-ring, water leakage does not occur even under sufficiently high water pressure.

According to the fifth waterproof pressure vessel of the present invention, the plurality of exhaust holes are formed in a block body different from the main body of the waterproof pressure vessel. Since it is inserted into the hole formed in the main body of the container, workability in processing the exhaust hole is improved.

According to the sixth waterproof pressure vessel of the present invention, the plurality of exhaust holes are formed by bundling a plurality of pipes, and the bundled pipes are inserted into holes formed in the main body of the waterproof pressure vessel. This eliminates the need for drilling of exhaust holes.

According to the seventh waterproof pressure vessel of the present invention, the pipe has a gasket groove for connecting a gasket used for airtightly connecting a pipe to an exhaust port, and a screw hole for connecting the pipe. Therefore, high airtightness can be maintained, and the piping can be easily connected and disconnected.

[Brief description of the drawings]

FIG. 1 is a sectional view (a) of essential parts showing a first embodiment of a water-resistant vessel according to the present invention, and a plan view showing an exhaust port 4c.

FIG. 2 is a cross-sectional view of a principal part showing a second embodiment of a water-resistant vessel according to the present invention.

FIG. 3 is a sectional view of a main part showing a third embodiment of a water-resistant vessel according to the present invention.

FIG. 4 is a cross-sectional view of a principal part showing a fourth embodiment of a water-resistant container according to the present invention.

FIG. 5 is a sectional view of a main part showing a conventional waterproof pressure vessel.

[Description of Signs] 1 Waterproof pressure vessel main body, 2 lid, 3 cylinder, 4 exhaust port, 4a taper section, 4b side wall section, 4c exhaust port bottom section, 5 exhaust hole, 6 cone type metal seal, 6a conical section, 6b Column-shaped part, 7 O-ring, 8 Press-in nut, 9 Gasket groove for pipe connection, 10 Screw hole for pipe connection, 11 Exhaust hole block body, 12 Pipe, 1
3 Exhaust port block body.

Claims (7)

[Claims] 1. A metal water-resistant container which is sealed in a vacuum-filled state or filled with a gas, wherein said tapered portion is opened outward and upward of a main body of said water-resistant container and is connected to said tapered portion. An exhaust port having a side wall portion and a bottom portion, a plurality of exhaust holes provided in the main body of the watertight container, and communicating from the inside of the main body of the watertight container to the bottom portion of the exhaust port, a conical portion and a cylindrical portion. Wherein the cone-shaped portion has a cone-shaped metal seal in contact with the tapered portion of the exhaust port, and a pressure means for pressing the cone-shaped metal seal in the direction of the tapered portion. . 2. The watertight container according to claim 1, wherein the exhaust port is formed in a main body of the watertight container. 3. An exhaust port is formed in a block body separate from the main body of the watertight container, and the block body formed with the exhaust port is connected to the main body of the watertight container. 2. The waterproof pressure vessel according to 1. 4. The water-resistant container according to claim 1, further comprising an O-ring provided on the cylindrical portion of the cone-shaped metal seal and in contact with a side wall of the exhaust port. 5. A plurality of exhaust holes are formed in a block body different from the main body of the watertight container, and the block body formed with the exhaust holes is inserted into a hole formed in the main body of the watertight container. The water resistant container according to any one of claims 1 to 4, wherein: 6. The plurality of exhaust holes are formed by bundling a plurality of pipes, and the bundled pipes are inserted into holes formed in a main body of the watertight vessel. The water resistant container according to any one of the above. 7. A gasket groove for fitting a gasket used for airtightly connecting a pipe to an exhaust port, and a screw hole for connecting the pipe are provided. 2. A water-resistant container according to 1.