JPH01279168A - Metal seal ring sealing structure - Google Patents

Abstract

PURPOSE:To enable necessary performance of high water-tightness to be always maintained by changing the effective thickness of a tightening size-adjusting ring correspondingly to a diameter decreased by plastic deformation of a metal seal ring. CONSTITUTION:A tightening size-adjusting ring 4, which is constituted having a thickness able to change corresponding to tightening size DELTAd of a metal seal ring 1 further enabling mount-removal to be attained without cutting a constitutional part in the inside of a pressure vessel, is provided in a pressure vessel main unit 2 in its opposed surface facing to an end face plate 3 and in an internal diameter side of the metal seal ring 1. Thus even in case of a metal seal sealing structure being repeatedly disassembled and reassembled, necessary performance of water-tightness can be always maintained by enabling a proper tightening size to be continually obtained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the sealing passage of metal seal rings of pressure vessels, particularly for long-term high-performance applications such as marine equipment that are repeatedly disassembled and reassembled. This invention relates to a sealing channel for a metal seal ring of a pressure vessel that can maintain watertight function.

[Prior Art] An example of marine equipment using a conventional metal seal ring sealing structure is shown in FIGS. 4(a) and 4(b).

The marine equipment that houses the amplifier 6 inside is the pressure vessel body 2.
and an end plate 3 fixed to the pressure vessel main body 2 by a tightening bolt 5. A composite cable 1o consisting of an optical fiber 7 and a power supply line 8 is introduced into the pressure vessel and connected to the amplifier 6.
The cables are connected to each other through an optical fiber connection section 11 and a power supply line connection section 12, respectively.

A watertight seal between the pressure vessel main body 2 and the end plate 3 is achieved by high water pressure sealing under the seabed using a resin O-ring 13 and a metal seal ring 1 installed in the tank 14. Here, the metal seal ring 1 is in charge of sealing the water vapor level after passing through the O-ring 13 made of resin.

The cross-sectional shape of the metal seal ring is generally C type or 0 type, made of stainless steel material, and the surface has approximately 50 mm
Metal coated with soft metal such as μm silver or indium. Therefore, the metal seal ring 1 has a high watertight performance that can eliminate the intrusion of water vapor level due to the elastic pressure bonding force of the stainless steel material and the biting close contact of the soft metal.

[Problems to be Solved by the Invention] The tightening dimension Δd of the metal seal ring is the value obtained by subtracting the blank height H from the diameter d of the metal seal ring. However, in the structure of the conventional metal seal ring 1,
As shown in FIG. 4(b), since the depth H of /1114 is constant, adjusting the amplifier 6 housed inside the pressure vessel, etc.
When the end plate 3 is temporarily removed with the optical fiber 7 and the power supply line 8 still attached, and the marine equipment is reassembled, a part of the tightening dimension Δd of the metal seal ring 1 is due to the plasticity of the metal seal ring 1. The diameter d decreases due to deformation, and the desired sealing performance cannot be obtained.

Furthermore, if the metal seal ring is replaced every time to maintain the sealing properties, since the optical fiber 7 and the power supply line 8 pass through the metal seal ring 1, it becomes necessary to cut both cables. Therefore, during reassembly, it is necessary to reconnect both cables, and the number of work steps increases by the number of reassemblies. This is not only a problem in terms of the number of work steps, but is also undesirable in terms of maintaining quality.

[Means for Solving the Problems] The present invention solves the above-mentioned conventional problems and provides a metal pressure vessel that can maintain a high watertight function for a long period of time even in marine equipment that is repeatedly disassembled and reassembled. This invention was made to provide a sealing structure for a seal ring, and in order to achieve the above object, the present invention provides a sealing structure for a metal seal ring between a pressure vessel main body and an end plate used in marine equipment, etc. The metal seal ring has a thickness that corresponds to the tightening dimension of the metal seal ring on the opposing surface between the pressure vessel body and the end plate, and can be attached and detached without cutting any components inside the pressure vessel. The present invention is characterized in that it has a tightening dimension adjusting ring configured as follows.

[Embodiment] Next, an embodiment of the metal seal ring sealing structure of the present invention will be described with reference to the drawings.

FIGS. 1(a) and 1(b) are a cross-sectional view of one embodiment of the metal seal ring sealing structure of the present invention and an enlarged cross-sectional view of the essential parts thereof.

FIGS. 2(a) and 2(b) are a plan view and a right side view of an embodiment of a tightening dimension adjusting ring used in the metal seal ring sealing structure of FIG. 1. 3(a) and 3(b) are a plan view and a right side view of another embodiment of the tightening dimension adjusting ring used in the metal seal ring sealing structure of FIG. 1.

In FIGS. 1(a) and (b), the metal seal ring sealing structure of the present invention is basically the same as the conventional metal seal ring sealing structure illustrated in FIGS. 4(a) and (b). have the same structure, and therefore the same reference numerals as those in FIG. 4 are given to the same components.

As shown in FIGS. 1(a) and 1(b), the metal seal ring sealing structure of the present invention has a pressure vessel main body 2 and an end plate 3 facing each other, On the side, there is a tightening dimension adjustment ring 4 which has a thickness that can be changed in accordance with the tightening dimension Δd of the metal seal ring 1 and is configured to be attachable and detachable without cutting any components inside the pressure vessel. have. That is, the metal seal ring sealing structure is temporarily attached to the pressure vessel while the end plate 3 is attached with the optical fiber 7 and the power supply line 8, for example, in order to adjust the amplifier 6 housed inside the pressure vessel. Suppose that it is removed from the main body 2. Then, after adjusting the amplifier 6,
When reassembling marine equipment, the effective thickness H of the tightening dimension adjusting ring t1 at the time of reassembly is made smaller than the effective thickness H of the tightening dimension adjusting ring 4 at the time of reassembly. This is because part of the tightening dimension Δd of the metal seal ring 1 is reduced in diameter d due to plastic deformation of the metal seal ring 1 due to long-term use.

Figures 2(a) and (b), and Figures 3(a) and (
b) is a plan view and a right side view of an example of a tightening dimension adjusting ring used in the metal seal ring sealing structure of the present invention.

As illustrated in FIGS. 2(a) and (b), the first
In this embodiment, the tightening dimension adjusting ring 4 has a unitary structure having a cut portion 9 in a part thereof. Figure 3 (a
) and (b), in the second embodiment of the present invention, the tightening dimension adjusting ring 4 is composed of a plurality of divisible ring pieces. By using such a tightening dimension adjusting ring 4, it is possible to remove or attach the tightening dimension adjusting ring 4 from the pressure vessel main body without cutting the components housed in the pressure vessel. .

[Effects of the Invention] As described above, the present invention allows the effective thickness of the tightening dimension adjustment ring to be adjusted by the diameter d due to plastic deformation of the metal seal ring.
Since the metal seal ring can be changed in response to the decrease, even if the metal seal ring sealing structure is repeatedly disassembled and reassembled, it is possible to always obtain the appropriate tightening dimensions, thus achieving the required high watertightness. It has the advantage that performance can always be maintained.

[Brief explanation of the drawing]

FIGS. 1(a) and 1(b) are a cross-sectional view of one embodiment of the metal seal ring sealing structure of the present invention and an enlarged cross-sectional view of the essential parts thereof. FIGS. 2(a) and 2(b) are a plan view and a right side view of an embodiment of a tightening dimension adjusting ring used in the metal seal ring sealing structure of FIG. 1. 3(a) and 3(b) are a plan view and a right side view of another embodiment of the tightening dimension adjusting ring used in the metal seal ring sealing structure of FIG. 1. FIG. FIGS. 4(a) and 4(b) are a cross-sectional view of a marine device using a conventional metal seal ring sealing structure, and an enlarged cross-sectional view of a main part thereof. 1... Metal seal ring 2... Pressure vessel body 3... End plate 4... Tightening dimension adjustment ring 5... Tightening bolt 6... Amplifier 7... Optical fiber 8...Feeding line 9...Ring cutting part 10...Composite cable 11...Optical fiber joining part 12...Feeding line connecting part 13...0 ring 14...

Claims (1)

[Claims] In a metal seal ring sealing structure between a pressure vessel body and an end plate used in marine equipment, etc., the metal seal ring is fastened on the inner diameter side of the metal seal ring on the opposing surface between the pressure vessel body and the end plate. A metal seal ring sealing structure characterized by having a tightening dimension adjustment ring that has a thickness corresponding to the mounting dimensions and can be attached and detached without cutting any components inside the pressure vessel.