WO2016199931A1

WO2016199931A1 - Double-sealed terminal header and method of manufacturing double-sealed terminal header

Info

Publication number: WO2016199931A1
Application number: PCT/JP2016/067466
Authority: WO
Inventors: 中島　広
Original assignee: 中島　広
Priority date: 2015-06-11
Filing date: 2016-06-06
Publication date: 2016-12-15

Abstract

In this double-sealed terminal header, for use in portions of penetration through low-temperature tanks for storing liquefied natural gas or the like: one end of a first annular seal fitting (5) is fixed to an inner circumferential surface of a large-diameter hole portion (11) in a separating wall flange (1); one end of a second annular seal fitting (6) is fixed to a prescribed part of a first outer diameter portion (21) of a ceramic sleeve (2); the first annular seal fitting and the other end of the second annular seal fitting are fixed to one another; one end of a third annular seal fitting (7) is fixed to an inner circumferential surface of a small-diameter hole portion (12) of the separating wall flange; a fourth seal fixture (8) is fixed to a predetermined part of a second outer diameter portion of a small-diameter hole portion of the ceramic sleeve; and the third seal fitting and the other end of the fourth seal fixture are fixed to one another.

Description

Double sealed terminal header and method for manufacturing double sealed terminal header

The present invention relates to a double-sealed terminal header used in a penetrating portion of a low-temperature tank that stores liquefied natural gas and the like, and a manufacturing method thereof, and more particularly to a double-sealed terminal header that suppresses the influence of thermal stress and manufacturing efficiency. The present invention relates to a method for manufacturing a double-sealed terminal header with improved performance.

A submerged motor pump is installed inside a low temperature tank for storing a low temperature liquefied gas such as LNG / LPG to send out a low temperature liquefied gas such as LNG / LPG to the outside of the tank. The motor of this submerged motor pump is driven by supplying electric power from the outside of the low temperature tank.
Since the inside of the low-temperature tank and the pump section are in a low-temperature and high-pressure state, it is necessary to prevent problems caused by liquid leakage and low temperature when power is supplied into the low-temperature tank. Conventionally, a double sealed terminal header has been used as a through bushing.
As is well known, this type of double-sealed terminal header is used in a penetrating portion of a low-temperature tank or the like for storing liquefied natural gas such as LNG / LPG. The double-sealed terminal header includes a partition flange that is fixed so as to close the penetrating portion of the tank, a ceramic sleeve that is inserted and fixed in a through hole provided in the partition flange, and a hollow inside the ceramic sleeve. And a conductor inserted through the portion, and a portion that needs to be sealed is sealed with a sealing material.
Also, this type of double sealed terminal header is manufactured and provided by a conventional manufacturing method.
FIG. 21 is an enlarged view showing a main part of a double sealed terminal header manufactured by a conventional manufacturing method. The enlarged view of the main part of the double sealed terminal header shown in FIG. 21 is cited from Japanese Patent No. 5801008.
In the double sealed terminal header TH shown in FIG. 21, 1 is a partition flange, 2 is a ceramic sleeve, 3 is an annular long sealing tube, 4 is a central conductor, 5 is a first annular sealing metal fitting, 6 Is a second annular sealing bracket, 7 is a third annular sealing bracket, 8 is a fourth annular sealing bracket, 10 is a through-hole drilled in the

partition flange

1, 11 is a large-diameter hole, 12 is a small-diameter hole, 13 and 20 are spaces, 21 is a thick cylindrical part, 22 is a thin cylindrical part, 23 is a first concave part, 24 is a second concave part, and 25 is a convex part.
In a conventional manufacturing method for manufacturing such a double-sealed terminal header, some processes are as follows. First, in the first step, one end of the first annular seal fitting 5 and one end of the second annular seal fitting 6 are welded, and one end of the third annular seal fitting 7 and the fourth annular seal are welded. One end of the metal fitting 8 is welded. Next, in the second step, the second annular sealing bracket 6 is brazed to the second recess 24 and the fourth annular sealing bracket 8 is brazed to the projection 25.
After these operations, the ceramic sleeve 2 is inserted into the partition flange 1 from the large-diameter hole 11 side, the other end of the first annular sealing bracket 5 is inserted into the partition flange 1, and the third annular sealing bracket 7 is mounted. The other end is welded to the partition flange 1.

Japanese Utility Model Publication No. 64-35637 JP-A-8-338596 JP 10-116530 A Japanese Patent No. 5801008

In the conventional double-sealed terminal header, a structure for absorbing the thermal stress generated according to the temperature change is provided. However, in the conventional technique described in Patent Document 1, the thermal stress exceeding the proof stress in the axial direction is provided. However, the conventional technology described in Patent Document 2 attempts to absorb thermal stress by reducing the cross-sectional area of the intermediate portion of the conductor to provide flexibility. Therefore, the flexibility may be lost, and the prior art described in Patent Document 3 uses a bellows structure to absorb thermal stress. However, there is a disadvantage that metal fatigue occurs in the bellows structure portion. It was.
On the other hand, in the method of manufacturing the double sealed terminal header, the welded portion applied to the first annular sealing bracket 5 and the third annular sealing bracket 7 in the first step is the second step. There is a drawback that a problem occurs that the temperature deteriorates due to the temperature of the heat treatment process during brazing.
Further, in the welding process of one end of the third annular sealing bracket 7 and one end of the fourth annular sealing bracket 8, since the one end enters the space 20 of the ceramic sleeve 2, welding is structurally performed. There was a drawback that it was difficult to do.
In addition, as shown in the area of FIG. 21A, the boundary F surface between the large-diameter hole portion 11 and the small-diameter hole portion 12 and the boundary surface between the thick cylindrical portion 21 and the thin cylindrical portion 22 are in contact with each other. Therefore, when the ceramic sleeve 2 is subjected to stress by being exposed to a high pressure, there is a defect that the ceramic sleeve 2 is cracked or broken.
A first object of the present invention is to provide a double-sealed terminal header that eliminates the disadvantages of the structure of the apparatus and reduces the influence of thermal stress.
The second object of the present invention is to provide a double seal capable of eliminating the disadvantages of the method of manufacturing the above apparatus, eliminating the deterioration of the welded portion, facilitating the welding work, and preventing the ceramic sleeve from being damaged. It is to provide a method of manufacturing a type terminal header.

In order to achieve the first object, a double sealed terminal header according to the first aspect of the present invention is a double sealed terminal header used in a penetration part of a low temperature tank for storing liquefied natural gas or the like. A partition flange that is fixed so as to close the penetrating portion and has a predetermined thickness and has a through hole, and a through hole formed in a hollow cylindrical shape and formed in the partition flange. In a double-sealed terminal header comprising a fixed ceramic sleeve and a conductor inserted and fixed in the hollow portion of the ceramic sleeve, and sealing a portion that requires sealing with a sealing material,
The through-hole provided in the partition flange has a predetermined first length from the central axis toward the second side face contacting the room temperature and atmospheric pressure side from the first side face contacting the low temperature and high pressure side. A large-diameter hole formed in the radius;
A small diameter formed from the second side surface side to the first side surface side to the large diameter hole portion and having a radius smaller than the radius of the large diameter hole portion and formed from the central axis to the second radius. With holes,
The ceramic sleeve is formed into a hollow cylindrical body having a predetermined length,
The part in contact with the low temperature pressure side is formed with a predetermined length with an outer diameter slightly smaller than the inner diameter of the large-diameter hole portion of the partition flange, and has an outer shape that fits into the large-diameter hole portion of the partition flange with a predetermined gap. 1 outer diameter part,
A second portion having an outer shape that is formed in a predetermined length with a radius slightly smaller than the inner diameter of the small-diameter hole portion of the partition flange, and that fits into the small-diameter hole portion of the partition flange with a predetermined gap. An outer diameter portion,
The ceramic sleeve is fitted in the through hole of the partition flange,
Fixing one end of the first sealing fitting at a predetermined position on the inner peripheral surface of the large-diameter hole of the partition flange;
One end of the second sealing fitting is fixed at a predetermined position of the first outer diameter portion of the ceramic sleeve, and the other end of the first sealing fitting and the other ends of the second sealing fitting are fixed. And
One end of the third sealing fitting is fixed to a predetermined position on the inner peripheral surface of the small-diameter hole of the partition flange, and a fourth sealing fitting is fixed to a predetermined position on the second outer diameter portion of the ceramic sleeve. ,
The other end of the third sealing bracket and the other end of the fourth sealing bracket are fixed to each other.
A double-sealed terminal bedder according to a second aspect of the present invention is the double-sealed terminal bedder according to the first aspect, wherein the first annular sealing metal fitting has an outer peripheral surface at an inner peripheral surface of a large-diameter hole portion of a partition flange. The second annular sealing metal fitting is fixed at its inner peripheral surface at one end to a second recess provided in the ceramic sleeve, and the other annular inner surface of the first annular sealing metal fitting and the second annular sealing metal fitting. The outer peripheral surface of the other end of the sealing fitting is fixed at the boundary position between the large diameter hole portion and the small diameter hole portion of the first recess,
One end outer peripheral surface of the third annular sealing bracket is fixed to the inner peripheral surface of the small-diameter hole portion of the partition flange, and the fourth annular sealing bracket is one end inner peripheral surface of the convex portion provided on the ceramic sleeve. The other end inner peripheral surface of the third annular sealing bracket and the other end outer peripheral surface of the fourth annular sealing bracket are formed between the large-diameter hole portion and the small-diameter hole portion on the low-temperature pressure side from the convex portion. It is characterized by being fixed at the boundary position.
A double-sealed terminal bedder according to a third aspect of the present invention is the double-sealed terminal bedding according to the first or second aspect, wherein the first sealing metal fitting and the third sealing metal fitting have a coefficient of thermal expansion of the partition flange. It is characterized by being made of a material having a thermal expansion coefficient that is substantially the same or within a certain range with respect to the thermal expansion coefficient of the partition flange.
According to a fourth aspect of the present invention, there is provided the double-sealed terminal bedder according to the first or second aspect, wherein the second sealing metal fitting and the fourth sealing metal fitting are substantially equal to a thermal expansion coefficient of the ceramic sleeve. It is the same or is made of a material having a thermal expansion coefficient within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve.
In order to achieve the first object, a double-sealed terminal header according to claim 5 according to the present invention,
In the double-sealed terminal header used for the penetration part of the cryogenic tank that stores liquefied natural gas,
Concentrically with the central axis, the central conductor, annular sealing tube, and ceramic sleeve are arranged in this order from the central axis side. The annular sealing tube is formed in a cylindrical shape with a predetermined length and a predetermined thickness in the central axis direction by Kovar on the outer periphery of the central conductor, and the ceramic sleeve is formed on the outer periphery of the annular sealing tube. It is formed in a cylindrical shape with a predetermined length and a predetermined thickness in the central axis direction, and the ceramic sleeve is integrated with a low-temperature tank fixing partition flange,
The annular sealing tube is formed with an inner diameter that maintains a predetermined gap between the inner peripheral surface and the outer peripheral surface of the central conductor, and the ceramic sleeve has a predetermined gap between the inner peripheral surface and the Kovar outer peripheral surface. It is formed on the inner diameter where the gap is maintained,
And the said center conductor, a sealing pipe | tube, and a ceramic sleeve are the double sealing type terminal headers supported by the support structure in the predetermined position,
The central conductor forms a convex portion at a portion located on the normal temperature and atmospheric pressure side when installed in the penetration portion of the low-temperature tank, and the convex portion has a first length in the central axis direction and is sealed Formed to the same outer diameter as the outer diameter of the pipe,
The annular sealing tube is composed of an annular long sealing tube and an annular short sealing tube, and the annular long sealing tube is formed to have a second length in the central axis direction and is a convex portion of the central conductor. It is arranged in a region on the lower temperature and high pressure side and is attached to the convex portion of the central conductor by a support structure, and the annular short sealing tube is formed in a third length in the central axis direction to form the central conductor. Arranged in the region on the room temperature and atmospheric pressure side from the convex part, and attached to the convex part of the central conductor with a support structure,
The first length in the central axis direction of the convex portion of the central conductor, the second length in the central axis direction of the annular long sealed tube, and the third length in the central axis direction of the annular short sealed tube The total length of the ceramic sleeve and the length in the central axis direction of the ceramic sleeve,
And the expansion value in the central axis direction due to thermal expansion and thermal contraction of the annular long sealing tube and the short annular sealing tube and the expansion value in the central axis direction due to thermal expansion and thermal contraction of the convex portion of the central conductor The length of the convex portion of the central conductor and the annular seal are such that the added value of the ceramic sleeve and the expansion / contraction value in the central axis direction due to thermal expansion and contraction of the ceramic sleeve are maintained within substantially the same or constant range. The length of the tube and the length of the ceramic sleeve are set to predetermined lengths, respectively.
A double-sealed terminal header according to a sixth aspect of the present invention is the double-sealed terminal header according to the fifth aspect, wherein the first length in the central axis direction of the convex portion of the central conductor is long in the central axis direction of the ceramic sleeve. It is set to about 20.8% of the
And the total length of the second length in the central axis direction of the annular long sealed tube and the third length in the central axis direction of the annular short sealed tube is the total axial direction of the ceramic sleeve The length is set to approximately 79.2% of the length.
The double-sealed terminal header according to claim 7 is the invention according to

claim

5 or 6,
The length in the central axis direction of the ceramic sleeve is L10, its thermal expansion coefficient is α10, the first length in the central axis direction of the convex portion of the central conductor is L20, its thermal expansion coefficient is α20, and When the total length of the second length in the central axis direction of the annular long sealed tube and the third length in the central axis direction of the annular short sealed tube is L30, and the coefficient of thermal expansion is α30,
L10 = L20 + L30
L10 × α10 = (L20 × α20) + (L30 × α30)
The relationship is established.
In order to achieve the second object, a method for manufacturing a double-sealed terminal header according to the invention of claim 8 comprises:
In the manufacturing method of the double-sealed terminal header used in the penetrating part of the low temperature tank for storing liquefied natural gas etc.,
A first processing step of processing the shape of the partition flange and the ceramic sleeve into a predetermined shape;
A second processing step of processing the first annular sealing bracket, the second annular sealing bracket, the third annular sealing bracket and the fourth annular sealing bracket, and the hollow cylindrical protective bracket;
A first processing step in which the second annular sealing metal fitting, the hollow tube type metal fitting and the fourth annular sealing metal fitting are arranged at predetermined positions of the ceramic sleeve and then brazed;
The first annular sealing bracket is positioned and positioned on the second annular sealing bracket, the third annular sealing bracket is positioned and positioned on the fourth annular sealing bracket, and the first annular sealing bracket is positioned. A second processing step of welding one end side surface of the sealing metal fitting and the second annular sealing metal fitting and one end side surface of the third annular sealing metal fitting and the fourth annular sealing metal fitting,
After the ceramic sleeve is disposed in the through hole of the partition flange with the first annular sealing bracket, the second annular sealing bracket, the third annular sealing bracket and the fourth annular sealing bracket attached. And a third processing step of welding the end side surface of the first annular sealing bracket and the partition flange and the end side surface of the third annular sealing bracket and the partition flange, respectively. .
The method for manufacturing a double-sealed terminal header according to a ninth aspect of the present invention is the method according to the eighth aspect, wherein the second processing step is such that one end side of the fourth annular sealing bracket is the other side surface. A processing step of forming a substantially J-shaped cross-section by bending into a circular shape so as to face the end side;
The one end side of the third annular sealing bracket is formed in a shape that fits into the bent portion of the fourth annular sealing bracket, and the bent portion on the one end side of the third annular sealing bracket is the fourth It is characterized by comprising a processing step of forming a shape in which the side surfaces of the bent portions are aligned when fitted to the bent portions of the annular sealing metal fitting.
According to a tenth aspect of the present invention, there is provided a method for manufacturing a double-sealed terminal header according to the eighth aspect, wherein the second processing step is to replace the hollow cylindrical body of the hollow cylindrical protective metal fitting with the third thick cylinder of the ceramic sleeve. It includes a step of fitting and brazing to the part.

According to the double-sealed terminal bedder according to the first aspect of the present invention, the through-hole comprising the large-diameter hole portion and the small-diameter hole portion is formed in the partition flange, and the ceramic sleeve is used as the first outer-diameter portion. And the second outer diameter portion so that the first outer diameter portion fits into the large diameter hole portion and the second outer diameter portion fits into the small diameter hole portion with a certain gap. A structure having a predetermined shape is provided at the boundary with the outer diameter portion, and the first outer diameter portion of the partition flange and the large diameter hole portion of the ceramic sleeve are fixed by the first sealing fitting and the second sealing fitting. Since the second outer diameter portion of the partition flange and the small diameter hole portion of the ceramic sleeve are fixed by the third sealing metal fitting and the fourth sealing metal fitting, the structure absorbs thermal stress. As a result, thermal stress in the axial direction of partition flanges, ceramic sleeves, conductors, etc. does not occur and metal fatigue An excellent effect that there is no possible cause.
According to the double-sealed terminal bedder according to the invention of claim 5, when the central conductor is installed in the penetrating portion of the low-temperature tank, a convex shape is formed at a portion of the central conductor located on the normal temperature and atmospheric pressure side A first length in the central axis direction of the convex portion of the central conductor, a second length in the central axis direction of the annular long sealing tube, and a central axial direction of the annular short sealing tube. The total length of the third length and the length in the central axis direction of the ceramic sleeve are substantially the same, and the central axis by thermal expansion and contraction of the annular long sealing tube and the annular short sealing tube The expansion value in the central axis direction due to thermal expansion and thermal contraction of the ceramic sleeve and the expansion value in the central axis direction due to thermal expansion and thermal contraction of the ceramic sleeve are substantially the same. To a value maintained within a certain range. Since the length of the convex portion, the length of the annular sealing tube, and the length of the ceramic sleeve are set to predetermined lengths, the center conductor, the annular long sealing tube, and the annular short sealing tube and ceramic The sleeve expands and contracts to substantially the same value, and an excellent effect is obtained that the influence of thermal stress along the central axis direction can be reduced.
According to the method for manufacturing a double-sealed terminal header according to the eighth aspect of the invention, the following excellent effects are obtained.
(1) Since the influence of the heat treatment process can be eliminated by adopting the above manufacturing process, it is possible to prevent deterioration of the welded portion of each annular sealing metal fitting.
(2) Since one end side surfaces of the fourth annular sealing metal fitting and the third annular sealing metal fitting face the other end side, the welding operation is remarkably easy.
(3) The hollow cylindrical body of the hollow protective metal fitting is fitted and brazed to the second thick cylindrical portion of the ceramic sleeve at the boundary between the thick cylindrical portion and the thin cylindrical portion of the ceramic sleeve. Since the ceramic sleeve and the partition flange are in contact with the ceramic sleeve through a hollow cylindrical protective fitting fixed by brazing, the ceramic portion does not directly contact the partition flange, so even if the ceramic sleeve is exposed to high pressure, Since stress concentration does not occur in the ceramic portion, the ceramic sleeve is not damaged or cracked, and a strong double sealed terminal header can be obtained.

FIG. 1 is a cross-sectional view showing an example of an embodiment of a double sealed terminal header according to the first embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the central portion of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 3 is an enlarged sectional view showing a cold pressure side end portion of a ceramic sleeve or the like of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 4 is an enlarged sectional view showing a normal temperature atmospheric pressure side end portion of a ceramic sleeve or the like of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a partition flange, which is a partial component of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a ceramic sleeve which is a partial component of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 7 is an enlarged cross-sectional view showing another configuration example of the cold pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 8 is an enlarged cross-sectional view showing another configuration example of the end portion on the normal temperature and atmospheric pressure side such as the ceramic sleeve of the double sealed terminal header according to the first embodiment of the present invention.
FIG. 9 is a cross-sectional view schematically showing the structure of a double sealed terminal header according to the second embodiment of the present invention.
10 is a cross-sectional view taken along the line AA ′ of FIG.
FIG. 11 is a cross-sectional view taken along line BB ′ of FIG.
12 is a cross-sectional view taken along the line CC ′ of FIG.
13 is a cross-sectional view taken along the line DD ′ of FIG.
FIG. 14 is an enlarged cross-sectional view showing the low temperature pressure side end portion of the ceramic sleeve or the like of the double sealed terminal header according to the second embodiment of the present invention.
FIG. 15 is an enlarged cross-sectional view showing a normal temperature atmospheric pressure side end portion of a ceramic sleeve or the like of a double sealed terminal header according to a second embodiment of the present invention.
FIG. 16 is an enlarged cross-sectional view showing another configuration example of the cold pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the second embodiment of the present invention.
FIG. 17 is an enlarged cross-sectional view showing another configuration example of a normal temperature atmospheric pressure side end portion such as a ceramic sleeve of a double sealed terminal header according to a second embodiment of the present invention.
FIG. 18 is a cross-sectional view showing a double sealed terminal header manufactured by a method for manufacturing a double sealed terminal header according to a third embodiment of the present invention.
FIG. 19 is an enlarged cross-sectional view showing a main part of a double sealed terminal header manufactured by a method for manufacturing a double sealed terminal header according to a third embodiment of the present invention.
FIG. 20 is a process diagram for explaining a method for manufacturing a double sealed terminal header according to the third embodiment of the present invention. FIG. 20 (a) shows the first process step, and FIG. FIG. 20C shows the second processing step, and FIG. 20C shows the third processing step.
FIG. 21 is a cross-sectional view showing a main part of a conventional double sealed terminal header.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
1, FIG. 2, FIG. 5 and FIG. 6, the embodiment of the double-sealed terminal header TH according to the first embodiment of the present invention is also a low-temperature tank for storing liquefied natural gas such as LNG / LPG. It is used for the penetration part.
This double sealed terminal header TH includes a partition flange 1, a ceramic sleeve 2, an annular long sealing tube 3, a center conductor 4, a first annular sealing metal fitting 5, and a second annular sealing. A fitting 6, a third annular sealing fitting 7, a fourth annular sealing fitting 8, an annular short sealing tube 9, and terminals Pa and Pb are provided, and a portion requiring sealing is sealed. It is formed by sealing with a material.
Furthermore, each component of the double-sealed terminal header TH will be described in detail with reference to FIGS. 1, 2, 5, and 6. FIG.
The partition flange 1 is configured as follows. That is, the partition flange 1 is configured by a plate body having a predetermined thickness (La + Lb) made of, for example, SUS316L, and a through hole 10 is formed in the plate body. The through hole 10 formed in the partition flange 1 includes a large diameter hole portion 11 and a small diameter hole portion 12.
The large-diameter hole portion 11 has a predetermined first length from the first side surface Sa side of the partition wall flange 1 in contact with the low temperature and high pressure side toward the second side surface Sb side of the partition wall flange 1 in contact with the room temperature and atmospheric pressure side. Over the length La, the first radius Ra is drilled from the central axis O.
The small-diameter hole portion 12 extends from the radius Ra of the large-diameter hole portion 11 over a second length Lb from the second side surface Sb side to the first side surface Sa side to the large-diameter hole portion 11. A small radius is drilled from the central axis O while maintaining the second radius Rb.
Next, the ceramic sleeve 2 is configured as follows. That is, the ceramic sleeve 2 is made of a ceramic insulator made of, for example, 92% alumina (material name of Nippon Special Ceramics Co., Ltd .: HA-92), and is a hollow cylindrical body having a predetermined length Lc. Thus, it is formed in a shape composed of a thick cylindrical portion 21 and a thin cylindrical portion 22.
The thick cylindrical portion 21 is formed to have a predetermined length Ld with an outer diameter Rc slightly smaller than the inner diameter Ra of the large-diameter hole portion 11 of the partition flange 1 at a portion in contact with the low-temperature pressure side. 11 is formed in an outer shape that can be fitted with a predetermined gap Da.
The narrow cylindrical portion 22 is formed to have a predetermined length Le with a radius Rd slightly smaller than the inner diameter of the small-diameter hole portion 12 of the partition flange 1 at a portion in contact with the room temperature and atmospheric pressure side. It is formed in an outer shape that can be fitted with a predetermined gap Db.
The ceramic sleeve 2 is configured in a predetermined shape on both sides of the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22.
A predetermined radius Re from the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22 of the ceramic sleeve 2 on the low temperature pressure side and to the outer peripheral portion of the ceramic sleeve 2 toward the low temperature pressure side. Thus, the first recess 23 is formed. Further, the first concave portion is formed on the outer peripheral portion of the ceramic sleeve 2 on the left side of the first concave portion 23 on the low temperature pressure side from the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22 of the ceramic sleeve 2. A second recess 24 is formed which has a radius Rf larger than the radius Re of 23 and smaller than the outer diameter Rc.
Further, the ceramic sleeve 2 is located at a predetermined position on the normal temperature and atmospheric pressure side at a predetermined position on the normal temperature and atmospheric pressure side from the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22. A convex portion 25 having a radius Rg larger than the radius Rd of the thin cylindrical portion 22 and smaller than the radius Rb of the small-diameter hole portion 12 of the partition flange 1 is formed.
In the partition flange 1, at the boundary portion between the large-diameter hole portion 11 and the small-diameter hole portion 12, the semicircular shape as illustrated from the boundary portion on the large-diameter hole portion 11 side toward the room temperature and atmospheric pressure side. A space 13 is formed. Further, in the ceramic sleeve 2, at the boundary F portion between the thick cylindrical portion 21 and the thin cylindrical portion 22, as shown in the drawing, from the position of the boundary F on the thin cylindrical portion 22 side toward the low-temperature pressure side. A space 20 is formed in a circular shape.
And the large cylindrical part 21 of the said ceramic sleeve 2 is arrange | positioned as shown in FIG.1 and FIG.2 in the large diameter hole part 11 of the said partition flange 1, and naturally the small diameter of the said partition flange 1 by the arrangement | positioning. In the hole 12, the narrow cylindrical portion 22 of the ceramic sleeve 2 is arranged as shown in FIGS.
When the partition flange 1 and the ceramic sleeve 2 are arranged as shown in FIGS. 1 and 2, the large-diameter hole portion 11 of the partition flange 1 and the thick cylindrical portion 21 of the ceramic sleeve 2 are in a first annular shape. The connection by the sealing metal fitting 5 and the second annular sealing metal fitting 6 will be described.
That is, one end of the first annular sealing metal fitting 5 is fixed to the inner peripheral surface of the large-diameter hole portion 11 of the partition flange 1. An inner peripheral surface of one end of the second annular sealing metal fitting 6 is fixed to a predetermined portion of the first outer diameter portion 21 of the ceramic sleeve 2. Further, the first annular sealing metal fitting 5 and the second annular sealing metal fitting 6 are fixed at the other ends thereof, so that the large-diameter hole portion 11 of the partition flange 1 and the ceramic sleeve 2 are thick. The cylindrical part 21 is connected.
More specifically, one end side outer peripheral surface of the first annular sealing metal fitting 5 is fixed to the inner peripheral surface of the large-diameter hole portion 11 of the partition flange 1 by, for example, TIG welding. The inner peripheral surface of one end side of the second annular sealing metal fitting 6 is fixed to the flat surface of the second concave portion 24 which is a predetermined portion of the thick cylindrical portion 21 of the ceramic sleeve 2 by, for example, brazing. On the inner circumferential surface of the first annular sealing bracket 5, the outer circumferential surface on the other end side of the second annular sealing bracket 6 is fixed at the position of the boundary F of the space 13 by, for example, TIG welding.
The first annular sealing metal fitting 5 is made of, for example, SUS316L, and is substantially the same as the thermal expansion coefficient of the partition flange 1 or a material having a thermal expansion coefficient within a certain range with respect to the thermal expansion coefficient of the partition flange 1. May be configured. Further, the second annular sealing metal fitting 6 is made of, for example, Kovar, and is approximately the same as the thermal expansion coefficient of the ceramic sleeve 2 or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve. What is necessary is just to comprise from the material of.
Furthermore, when the partition flange 1 and the ceramic sleeve 2 are arranged as shown in FIGS. 1 and 2, the small-diameter hole portion 12 of the partition flange 1 and the narrow cylindrical portion 22 of the ceramic sleeve 2 are 3 is connected by the fourth annular sealing bracket 7 and the fourth annular sealing bracket 8.
That is, one end of the third annular sealing fitting 7 is fixed to the inner peripheral surface of the small diameter hole 12 of the partition flange 1. A fourth annular sealing fitting 8 is fixed to a predetermined portion of the second outer diameter portion of the small diameter hole portion 12 of the ceramic sleeve 2. Then, the other ends of the third annular sealing metal fitting 7 and the fourth annular sealing metal fitting 8 are fixed to each other, so that the small diameter hole portion 12 of the partition wall flange 1 and the thin cylinder of the ceramic sleeve 2 are provided. The part 22 is connected.
More specifically, the outer peripheral surface of one end side of the third annular sealing metal fitting 7 is fixed to the inner peripheral surface of the small-diameter hole portion 12 of the partition flange 1 by, for example, TIG welding. On the flat surface of the convex portion 25 as a predetermined portion of the thin cylindrical portion 22 of the ceramic sleeve 2, the one end side inner peripheral surface of the fourth annular sealing metal fitting 8 is fixed by brazing, for example. On the inner peripheral surface of the third annular sealing bracket 7, the outer peripheral surface on the other end side of the fourth annular sealing bracket 8 is fixed at the position of the boundary F of the space 20 by, for example, TIG welding.
The third annular sealing bracket 7 is made of, for example, SUS316L and has a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the partition flange 1 or within a certain range with respect to the thermal expansion coefficient of the partition flange 1. What is necessary is just to comprise from a material. The fourth annular sealing bracket 8 is made of, for example, Kovar, and has a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the ceramic sleeve 2 or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve 2. What is necessary is just to comprise from a material.
Next, the relationship between the ceramic sleeve 2, the annular long sealing tube 3 and the center conductor 4 will be described with reference to FIGS. 1, 3 and 4.
The ceramic sleeve 2 is formed into a hollow cylindrical body. The ceramic sleeve 2 having a hollow cylindrical shape is provided with a through hole 26. As shown in FIGS. 1 and 3, an annular groove 27 having a predetermined depth in the axial direction and a predetermined width in the radial direction is provided at an end portion of the through hole 26 of the ceramic sleeve 2 on the low-temperature pressure side.
In the through hole 26 of the ceramic sleeve 2, an annular long sealing tube 3 formed to a predetermined length Li is fitted with no gap. The annular long sealing tube 3 is formed with an annular flange 31 that fits in the annular groove 27 of the ceramic sleeve 2 without a gap. The annular flange 31 of the annular long sealed tube 3 is fixed by, for example, brazing in a state of fitting in the annular groove 27 of the ceramic sleeve 2.
The central conductor 4 is formed in a cylindrical shape, and is formed so as to be housed in the through hole of the annular long sealed tube 3 and the through hole 26 of the ceramic sleeve 2. The central conductor 4 has a first convex portion 41 on the low temperature pressure side and in contact with the inner peripheral surface of the annular long sealing tube 3 at a certain length near the annular flange 31 of the annular long sealing tube 3. Is formed. The first convex portion 41 is in contact with the annular flange 31 of the annular long sealed tube 3 with a predetermined gap, but is not sealed.
Further, the center conductor 4 is formed with a second convex portion 42 that is in contact with the inner peripheral surface of the annular long sealing tube 3 at a constant length Lj on the end side of the annular long sealing tube 3. . Further, the central conductor 4 is formed with a convex portion 43 having a constant length Lk from the end of the annular long sealed tube 3 toward the room temperature and atmospheric pressure side. Here, the convex portion 43 is referred to as a third convex portion. Furthermore, a stepped portion 43 a that fits to the inner peripheral surface of the annular short sealed tube 9 is formed at the end of the convex portion 43 on the room temperature and atmospheric pressure side.
As shown in FIGS. 1, 3 and 4, the central conductor 4 is formed between the first convex portion 41 and the second convex portion 42, and between the second convex portion 42 and the third convex portion 42. Between the convex portions 43, the radius is smaller than the radius of each convex portion. As described above, the third convex portion 43 is formed with the step portion 43a on the normal temperature and atmospheric pressure side.
Then, as shown in FIG. 4, an annular short sealing tube 9 is fitted into the step 43a on the room temperature atmospheric pressure side of the third convex portion 43 of the central conductor 4, and the annular short sealing tube 9 and the ceramic sleeve 2 are fixed by, for example, brazing or welding, and the annular short sealed tube 9 and the center conductor 4 are fixed by, for example, brazing.
Further, a terminal attachment portion 45a is formed at the end of the central conductor 4 on the low temperature pressure side, and a terminal Pa is attached to the terminal attachment portion 45a. Similarly, a terminal mounting portion 45b is formed at an end of the central conductor 4 on the room temperature and atmospheric pressure side, and a terminal Pb is mounted on the terminal mounting portion 45b.
The double-sealed terminal header configured in this way includes a first annular sealing metal fitting 5 fixed to the inner peripheral surface of the large-diameter hole 11 of the partition flange 1 and a second of the ceramic sleeve 2. The second annular sealing metal fitting 6 fixed to the outer peripheral surface of the recess 24 is fixed at the position of the boundary F of the space 13 and further fixed to the inner peripheral surface of the small-diameter hole portion 12 of the partition flange 1. A structure in which the third annular sealing bracket 7 and the fourth annular sealing bracket 8 fixed to the outer peripheral surface of the convex portion 25 of the ceramic sleeve 2 are fixed at the position of the boundary F of the space 20. is doing.
Further, the first annular sealing metal fitting 5 and the third annular sealing metal fitting 7 have substantially the same thermal expansion coefficient as that of the partition flange 1 or a heat within a certain range with respect to the thermal expansion coefficient of the partition flange 1. It is composed of a material having an expansion coefficient. In addition, the second annular sealing metal fitting 6 and the fourth annular sealing metal fitting 8 are substantially the same as the thermal expansion coefficient of the ceramic sleeve 2 or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve. It is comprised from the material of the thermal expansion coefficient of.
Therefore, since the embodiment according to the present invention described above has a structure constituted by the material, the thermal stress in the axial direction of the central conductor and the like is absorbed by the structure, so that the partition flange, the ceramic sleeve, and the No thermal stress is generated in the axial direction of the conductor or the like, metal fatigue does not occur, and there is an excellent advantage that it can withstand long-term use without failure.
Furthermore, since the embodiment according to the present invention described above has a structure constituted by the above material, the force applied from the low temperature and high pressure side to the normal temperature and atmospheric pressure side applied to the ceramic sleeve 2 is the thick cylinder of the ceramic sleeve 2. Since the end of the portion 21 is pressed against the partition wall of the large-diameter hole portion 11 of the partition flange 1, an accident that the ceramic sleeve 2 comes off from the partition flange 1 does not occur.
In the double sealed terminal header according to the first embodiment of the present invention described above, the annular long sealing tube 3 is inserted and fixed in the through hole 26 of the ceramic sleeve 2, and the annular long sealing is performed. The receiving tube 3 is tightly fixed to the annular groove 27 of the ceramic sleeve 2 by an annular flange 31. Further, the central conductor 4 is in non-fixed contact with the annular long sealed tube 3 at the first convex portion 41, and the second convex portion 42 is formed on the inner peripheral surface of the annular long sealed tube 3, for example. It is fixed by brazing. And the said center conductor 4 inserts the cyclic | annular short sealing pipe | tube 9 in the step part 43a provided in the normal temperature atmospheric pressure side of the 3rd convex-shaped part 43, and cyclic | annular short sealing pipe | tube 9 and the central conductor 4 are cyclic | annular. The short sealing tube 9 and the ceramic sleeve 2 are fixed by brazing.
Therefore, in the double sealed terminal header according to the first embodiment of the present invention, the ceramic sleeve 2, the annular long sealed tube 3 and the central conductor 4 have the above-described structure. Since the thickness in the diameter direction can be reduced, the thermal stress generated in the diameter direction can be reduced, and the proof stress of each material can be reduced, there is an advantage that it is possible to provide a double-sealed terminal header that does not cause a failure or the like.
FIG. 7 is an enlarged cross-sectional view illustrating a part of another configuration example of the low-temperature pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the first embodiment of the present invention. In FIG. 7, there is a feature only in another configuration example portion of the low temperature pressure side end portion such as a ceramic sleeve, and the other configurations are not changed. Therefore, the same reference numerals as those in the above embodiment are given, and description thereof is omitted. To do. In addition, since this embodiment appears symmetrically with respect to the central axis O, only one cross section will be shown and described.
In FIG. 7, between the outer periphery of the annular flange 31 of the annular long sealing tube 3 and the inner peripheral surface of the annular groove 27 of the ceramic sleeve 2, as shown in FIG. Is intervening. And the said annular collar part 31 and the cyclic | annular metal fitting C55 are welded as shown by the code | symbol Y in FIG. 7, and the internal peripheral surface of the annular groove 27 and the outer peripheral surface of the cyclic | annular sealing metal fitting C55 are code | symbol in FIG. As shown by J, it is fixed with brazing.
FIG. 8 is an enlarged cross-sectional view showing a part of another configuration example of the normal temperature and atmospheric pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the first embodiment of the present invention. In FIG. 8, there is a feature only in the other configuration example portion of the normal temperature and atmospheric pressure side end portion such as a ceramic sleeve, and the other configuration is not changed. Omitted. In addition, since this embodiment appears symmetrically with respect to the central axis O, only one cross section will be shown and described.
In FIG. 8, the center conductor 4 is fitted with a circular short sealing tube 9a having a length as shown in FIG. 8 in a step portion 43a provided on the normal temperature and atmospheric pressure side of the third convex portion 43. An annular sealing tube C57 having a length as shown in FIG. 8 is fitted on the outer periphery of the short sealing tube 9a. Between the annular short sealed tube 9a and the step 43a in the third convex portion 43 of the central conductor 4, and between the outer periphery of the annular sealed tube C57 and the inner periphery of the ceramic sleeve 2. 8 are fixed by brazing as indicated by the symbol J in FIG. Further, the annular short sealed tube 9a and the annular sealed tube C57 are welded as indicated by a symbol Y in FIG.
7 and 8 as described above, the thickness in the diametrical direction can be reduced, so that the thermal stress generated in the diametrical direction can be reduced, the proof stress of each material can be reduced, and no failure occurs. A double-sealed terminal header with advantages can be provided.
Second Embodiment
Since the structure of the double sealed terminal header in the second embodiment of the present invention is almost the same as that shown in FIG. 1, the same reference numerals are given and the entire structure description is omitted. Features of the double sealed terminal header according to the second embodiment of the present invention will be described below with reference to FIGS.
FIG. 9 is a cross-sectional view schematically showing the structure of the double sealed terminal header according to the second embodiment of the present invention. 10 is a cross-sectional view taken along the line AA ′ of FIG. FIG. 11 is a cross-sectional view taken along line BB ′ of FIG. 12 is a cross-sectional view taken along the line CC ′ of FIG. 13 is a cross-sectional view taken along the line DD ′ of FIG.
As shown in FIGS. 1 and 9 to 17, the double sealed terminal header TH according to the second embodiment of the present invention is formed concentrically with the central axis O from the central axis side, An annular long sealing tube 3, an annular short sealing tube 9, and a ceramic sleeve 2 are arranged in this order.
The center conductor 4 is made of metal and has a predetermined length Lc or more in the direction of the central axis O as described above, and is formed in a cylindrical shape with a predetermined radius Rp as shown in FIG.
The annular long sealing tube 3 and the annular short sealing tube 9 have a predetermined length Li and Ls in the direction of the central axis O with Kovar on the outer periphery of the region Li and Ls of the central conductor 4, and As shown in FIG. 9, it is formed in a cylindrical shape having a predetermined thickness Wm.
The ceramic sleeve 2 is formed in a cylindrical shape having a predetermined length L10 in the direction of the central axis O and a predetermined thickness Wn on the outer periphery of the annular long sealing tube 3 and the annular short sealing tube 9. ing.
Further, as already described, the ceramic sleeve 2 is fitted and integrated with the low-temperature tank fixing partition flange 1.
The annular long sealing tube 3 and the annular short sealing tube 9 are formed to have an inner diameter Rs in which a predetermined gap Dpn is maintained between the inner peripheral surface and the outer peripheral surface of the central conductor 4. .
The ceramic sleeve 2 is formed to have an inner diameter Rt in which a predetermined gap Dmn is maintained between the inner peripheral surface thereof and the outer peripheral surfaces of the annular long sealing tube 3 and the annular short sealing tube 9.
As already described, the central conductor 4, the annular long sealing tube 3, the annular short sealing tube 9, and the ceramic sleeve 2 are supported by a support structure at predetermined positions. The central conductor 4 forms a convex portion 43 at a portion located on the normal temperature and atmospheric pressure side when installed in the penetrating portion of the low temperature tank. The convex portion 43 has a first length Lk in the direction of the central axis O and has the same outer diameter as the outer diameters of the annular long sealing tube 3 and the annular short sealing tube 9.
The annular long sealing tube 3 and the annular short sealing tube 9 may be integrated with the annular sealing tube. The annular long sealing tube 3 is formed in a second length Li in the direction of the central axis O, and is disposed in a region on the low temperature and high pressure side from the convex portion 43 of the central conductor 4. The support 4 is engaged by a support structure that fits into the convex portion 42 of the convex portion 43 of the conductor 4. The annular short sealing tube 9 is formed in a third length Ls in the direction of the central axis O, and is disposed in a region closer to the room temperature and atmospheric pressure than the convex portion 43 of the central conductor 4, and the center The support 4 is engaged with a support structure that fits into the step 43 a of the convex portion 43 of the conductor 4.
Here, in the present invention, the first length Lk (= L20) of the convex portion 43 of the central conductor 4 in the direction of the central axis O, the annular sealing tube (the direction of the central axis O of the annular long sealing tube 3). The total length (= L20 + L30) of the second length Li and the third length Ls of the annular short sealed tube 9 in the direction of the central axis O, and the direction of the central axis O of the ceramic sleeve 2 The length L10 of the annular seal tube (annular long sealed tube 3 and annular short sealed tube 9) is expanded and contracted in the direction of the central axis O by the coefficient of thermal expansion α30, and the central conductor. 4 and the expansion value in the central axis O direction by the thermal expansion coefficient α20 of the convex portion 43 and the expansion value in the central axis O direction by the thermal expansion coefficient α10 of the ceramic sleeve 2 are substantially the same or constant. The length L20 of the convex portion of the central conductor 4 and the annular sealing tube ( And Jo long sealing tube 3 and annular short sealing tube 9) of the length L30, is a ceramic sleeve 2 lengths L10 and those set respectively.
In the double sealed terminal header according to the second embodiment of the present invention, the first length Lk (= L20) of the convex portion 43 of the central conductor 4 in the direction of the central axis O is the center of the ceramic sleeve 2 It is preferable to set to approximately 20.8% of the length L10 in the axis O direction. Further, the second length Li of the annular long sealing tube 3 in the direction of the central axis O and the third length Ls of the annular short sealing tube 9 in the direction of the central axis O (L30 = Li + Ls) are: It is preferable to set the length of the ceramic sleeve 2 to approximately 79.2% of the length L10 in the central axis O direction.
That is, the length of the ceramic sleeve 2 in the direction of the central axis O is L10, and the coefficient of thermal expansion is α10. The first length of the convex portion 43 of the central conductor 4 in the central axis O direction is L20, and the coefficient of thermal expansion is α20. Further, the total length of the second length Lk of the annular long sealed tube 3 in the direction of the central axis O and the third length Ls of the annular short sealed tube 9 in the direction of the central axis O is defined as L30. When the expansion coefficient is α30, the following formula 1 is established.

In the second embodiment, when the central conductor 4 is installed in the penetration portion of the low-temperature tank, a convex portion 43 is formed at a portion of the central conductor 4 located on the normal temperature and atmospheric pressure side, and the central conductor 4 The first length L20 of the convex portion 43 in the direction of the central axis O, the second length Li of the annular long sealing tube 3 in the direction of the central axis O, and the first length of the annular short sealing tube 9 in the direction of the central axis O. The total length L30 of the three lengths Ls and the length L10 of the ceramic sleeve 2 in the direction of the central axis O are substantially the same, and the annular long sealing tube 3 and the annular short sealing tube 9 The sum of the expansion / contraction value in the central axis O direction by the thermal expansion coefficient α30 and the expansion / contraction value in the central axis O direction by the thermal expansion coefficient α20 of the convex portion 43 of the central conductor 4 and the thermal expansion coefficient α10 of the ceramic sleeve 2 The expansion / contraction value in the central axis O direction is almost the same or within a certain range. As described above, the length L20 of the convex portion of the central conductor 4, the length L30 of the annular sealing tube (the annular long sealing tube 3 and the annular short sealing tube 9), and the length L10 of the ceramic sleeve 2 Since the central conductor 4, the annular long sealing tube 3 and the annular short sealing tube 9, and the ceramic sleeve 2 expand and contract to substantially the same value, the central axis O There is an excellent effect that the influence of the thermal stress along the direction can be reduced.
Further, according to the second embodiment, since the thermal stress in the axial direction of the central conductor and the like is absorbed by the structure, the thermal stress in the axial direction of the central conductor and the like is not generated, and metal fatigue occurs. Therefore, it has an excellent advantage of withstanding long-term use without failure.
Furthermore, in the second embodiment, since the double-sealed terminal header has a structure made of the above material, the force applied from the low temperature and high pressure side applied to the ceramic sleeve 2 to the normal temperature and atmospheric pressure side is the ceramic sleeve. Since the end portion of the thick cylindrical portion 21 is pressed against the partition wall of the large-diameter hole portion 11 of the partition flange 1, an accident that the ceramic sleeve 2 comes off from the partition flange 1 does not occur.
In the second embodiment, the double sealed terminal header has an annular long sealing tube 3 inserted and fixed in the through hole 26 of the ceramic sleeve 2, and the annular long sealing tube 3 is annular. The flange portion 31 is closely fixed to the annular groove 27 of the ceramic sleeve 2. Further, the central conductor 4 is in non-fixed contact with the annular long sealed tube 3 at the first convex portion 41, and the second convex portion 42 is formed on the inner peripheral surface of the annular long sealed tube 3, for example. It is fixed by brazing. And the said center conductor 4 inserts the cyclic | annular short sealing pipe | tube 9 in the step part 43a provided in the normal temperature atmospheric pressure side of the 3rd convex-shaped part 43, and cyclic | annular short sealing pipe | tube 9 and the central conductor 4 are cyclic | annular. The short sealing tube 9 and the ceramic sleeve 2 are fixed by brazing.
Thereby, in 2nd Embodiment, since the said ceramic sleeve 2, the cyclic | annular elongate sealing pipe | tube 3, and the center conductor 4 are the structures as mentioned above in the double sealing type | mold terminal header, Since the thickness can be reduced, the thermal stress generated in the diametric direction can be reduced and the yield strength of each material can be reduced. Therefore, there is an advantage that it is possible to provide a double sealed terminal header that does not cause a failure or the like.
FIG. 16 is an enlarged cross-sectional view showing a part of another configuration example of the low temperature pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the present invention. In FIG. 16, there is a feature only in another configuration example portion of the low-temperature pressure side end portion such as a ceramic sleeve, and the other configurations are not changed. Omitted. In the present embodiment, since it appears symmetrical with respect to the central axis O, only one cross section will be shown and described.
In FIG. 16, an annular sealing fitting C55 is interposed between the outer periphery of the annular flange 31 of the annular long sealing tube 3 and the inner peripheral surface of the annular groove 27 of the ceramic sleeve 2. The annular flange 31 and the annular sealing metal fitting C55 are welded as indicated by a symbol Y in FIG. 16, and the inner peripheral surface of the annular groove 27 and the outer peripheral surface of the annular sealing metal fitting C55 are illustrated in FIG. As shown by 7 in FIG.
FIG. 17 is an enlarged cross-sectional view showing a part of another configuration example of the normal temperature atmospheric pressure side end portion such as the ceramic sleeve of the double sealed terminal header according to the present invention. In FIG. 17, there is a feature only in other structural example portions such as a ceramic sleeve and the other end of the normal temperature and atmospheric pressure side, and other configurations are not changed. Therefore, the same members as those in the above embodiment are denoted by the same reference numerals. The description is omitted. Since this embodiment appears symmetrically with respect to the central axis O, only one cross section will be shown and described.
In FIG. 17, the central conductor 4 is fitted with a ring-shaped short sealing tube 9a having a length as shown in FIG. An annular sealing tube C57 having a length as shown in FIG. 17 is fitted on the outer periphery of the short sealing tube 9a. Between the annular short sealed tube 9a and the step 43a in the third convex portion 43 of the central conductor 4, and between the outer periphery of the annular sealed tube C57 and the inner periphery of the ceramic sleeve 2. 17 are fixed by brazing as indicated by a symbol J in FIG. Further, the annular short sealed tube 9a and the annular sealed tube C57 are welded as indicated by a symbol Y in FIG.
Thus, even in the structure shown in FIGS. 16 and 17, the thickness in the diametrical direction can be reduced, so that the thermal stress generated in the diametrical direction can be reduced, the proof stress of each material can be reduced, failure, etc. It is possible to provide a double-sealed terminal header having an advantage that does not occur.
According to the second embodiment, the advantages of the configuration shown in FIG. 1 and the advantages of the present embodiment can be added to cope with a higher level of thermal stress (especially thermal stress in the central axis direction). Become.

<Example in the second embodiment>
An example of the second embodiment will be described by specifically substituting numerical values.
First, the expansion / contraction value due to heat of the ceramic sleeve 2 is determined.
Here, when the length L10 of the ceramic sleeve 2 is 216 [mm], for example, and the thermal expansion coefficient α10 = 7.5 × 10 (minus the sixth power), the expansion / contraction value of the ceramic sleeve 2 due to heat is obtained from Equation 2. It is done.

Next, the expansion / contraction value due to heat of the convex portion 43 of the center conductor 4 is determined.
Here, since the length L10 of the ceramic sleeve 2 is set to 216 [mm], for example, the length of the convex portion 43 of the central conductor 4 is about 20.8% of the length L10. It is 45 [mm] and is calculated with this value below.
That is, when the length L20 of the convex portion 43 of the central conductor 4 is set to 45 [mm] and the coefficient of thermal expansion α20 = 17.0 × 10 (minus the sixth power), the convex portion of the central conductor 4 is obtained from Equation 3. The expansion / contraction value by heat of 43 is calculated | required.

In addition, the expansion / contraction value due to heat of the annular sealing tube (the annular long sealing tube 3 and the annular short sealing tube 9) is determined.
Since the length L10 of the ceramic sleeve 2 is set to, for example, 216 [mm], the annular sealing tube (3, 9) has a length of about 30% of L30. = 171 [mm], and calculation is performed with this value. When the length L30 = 171 [mm] of the annular sealing tube (annular long sealing tube 3, annular short sealing tube 9) and the coefficient of thermal expansion α30 = 5.0 × 10 (minus the sixth power), The expansion / contraction value by the heat | fever of a cyclic | annular sealing pipe (The cyclic | annular long sealing pipe | tube 3, the cyclic | annular short sealing pipe | tube 9) is calculated | required from Numerical formula 4.

Examining the results obtained by the above formulas 2 to 4, the results are as follows.
When the result of Expression 3 and the result of Expression 4 are added, 765 × 10 (minus the sixth power) + 855 × 10 (minus the sixth power) = 1620 × 10 (minus the sixth power) is obtained. The same thermal expansion or the same thermal contraction is obtained, and the constituent elements here are not individually thermally expanded or contracted, so that it can be confirmed that breakage due to the difference in expansion and contraction values can be prevented.
Therefore, the advantages of the second embodiment as described above can be obtained.
<Third Embodiment>
18 and 19 show a double sealed terminal header manufactured by the method for manufacturing a double sealed terminal header according to the third embodiment of the present invention.
The double-sealed terminal header TH shown in these drawings is also used for a penetrating portion such as a low-temperature tank for storing liquefied natural gas such as LNG / LPG. In addition, the code | symbol attached | subjected to each member shown in FIG.18 and FIG.19 shall attach | subject the same code | symbol fundamentally to the same thing as the member shown in FIG.
This double sealed terminal header TH includes a partition flange 1, a ceramic sleeve 2, an annular long sealing tube 3, a center conductor 4, a first annular sealing metal fitting 5, and a second annular sealing. A fitting 6, a third annular sealing fitting 7, a fourth annular sealing fitting 8, an annular short sealing tube 9, and terminals Pa and Pb are provided, and a portion requiring sealing is sealed. It is formed by sealing with a material.
The partition flange 1 is configured as follows. That is, the partition flange 1 is configured by a plate body having a predetermined thickness (La + Lb) made of, for example, SUS316L, and a through hole 10 is formed in the plate body. The through hole 10 formed in the partition flange 1 includes a large diameter hole portion 11 and a small diameter hole portion 12.
The large-diameter hole portion 11 has a predetermined first length from the first side surface Sa side of the partition wall flange 1 in contact with the low temperature and high pressure side toward the second side surface Sb side of the partition wall flange 1 in contact with the room temperature and atmospheric pressure side. Over the length La, the first radius Ra is drilled from the central axis O.
The small-diameter hole portion 12 extends from the radius Ra of the large-diameter hole portion 11 over a second length Lb from the second side surface Sb side to the first side surface Sa side to the large-diameter hole portion 11. A small radius is drilled from the central axis O while maintaining the second radius Rb.
The partition flange 1 has a radius Rh larger than the diameter Rb of the small meridian part 12 by a predetermined length Lh from the boundary part F of the large meridian part 11 and the small meridian part 12 toward the small meridian part 12 side. The second small acupuncture hole 15 is formed by perforating.
Next, the ceramic sleeve 2 is configured as follows. That is, the ceramic sleeve 2 is made of a ceramic insulator made of, for example, 92% alumina (material name of Nippon Special Ceramics Co., Ltd .: HA-92), and is a hollow cylindrical body having a predetermined length Lc. Thus, it is formed in a shape composed of a thick cylindrical portion 21 and a thin cylindrical portion 22.
The thick cylindrical portion 21 is formed to have a predetermined length Ld with an outer diameter Rc slightly smaller than the inner diameter Ra of the large-diameter hole portion 11 of the partition flange 1 at a portion in contact with the low-temperature pressure side. 11 is formed in an outer shape that can be fitted with a predetermined gap Da.
The narrow cylindrical portion 22 is formed to have a predetermined length Le with a radius Rd slightly smaller than the inner diameter of the small-diameter hole portion 12 of the partition flange 1 at a portion in contact with the room temperature and atmospheric pressure side. It is formed in an outer shape that can be fitted with a predetermined gap Db.
The ceramic sleeve 2 is configured in a predetermined shape on both sides of the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22.
A predetermined length from the boundary F of the ceramic sleeve 2 to the low temperature pressure side from the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22 and toward the low temperature pressure side from the boundary F. A second thick cylindrical portion 24 and a third thick cylindrical portion 23 are formed with a predetermined radius Rj over Lj.
In the ceramic sleeve 2, the boundary surface of the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22 (the boundary surface on the thin cylindrical portion 22 side of the thick cylindrical portion 21) is a predetermined flat surface. It is formed in the shape of.
Further, the ceramic sleeve 2 is located at a predetermined position on the normal temperature and atmospheric pressure side at a predetermined position on the normal temperature and atmospheric pressure side from the boundary F between the thick cylindrical portion 21 and the thin cylindrical portion 22. A convex portion 25 having a radius Rg larger than the radius Rd of the thin cylindrical portion 22 and smaller than the radius Rb of the small-diameter hole portion 12 of the partition flange 1 is formed.
In the partition flange 1, at the boundary portion between the large-diameter hole portion 11 and the small-diameter hole portion 12, the semicircular shape as illustrated from the boundary portion on the large-diameter hole portion 11 side toward the room temperature and atmospheric pressure side. A space 13 is formed.
And the large cylindrical part 21 of the said ceramic sleeve 2 is arrange | positioned in the large diameter hole part 11 of the said partition flange 1 as shown in FIG.1 and FIG.9, Naturally the small diameter of the said partition flange 1 by the arrangement | positioning. In the hole 12, the narrow cylindrical portion 22 of the ceramic sleeve 2 is arranged as shown in FIGS.
One end of the first annular sealing metal fitting 5 is fixed to the inner peripheral surface of the large-diameter hole portion 11 of the partition flange 1. An inner peripheral surface of one end of the second annular sealing metal fitting 6 is fixed to a predetermined portion of the thick cylindrical portion 21 of the ceramic sleeve 2. Further, the first annular sealing metal fitting 5 and the second annular sealing metal fitting 6 are fixed at the other ends thereof, so that the large-diameter hole portion 11 of the partition flange 1 and the ceramic sleeve 2 are thick. The cylindrical part 21 is connected.
The outer peripheral surface of one end side of the first annular sealing metal fitting 5 is fixed to the inner peripheral surface of the large-diameter hole portion 11 of the partition flange 1 by, for example, TIG welding. The inner peripheral surface of one end side of the second annular sealing metal fitting 6 is fixed to the flat surface of the first recess 23 which is a predetermined portion of the thick cylindrical portion 21 of the ceramic sleeve 2 by, for example, brazing. The outer peripheral surface of the other end side of the second annular sealing metal fitting 6 is fixed to the inner peripheral surface of the first annular sealing metal fitting 5 by, for example, TIG welding.
The first annular sealing metal fitting 5 is made of, for example, SUS316L, and is substantially the same as the thermal expansion coefficient of the partition flange 1 or a material having a thermal expansion coefficient within a certain range with respect to the thermal expansion coefficient of the partition flange 1. May be configured. Further, the second annular sealing metal fitting 6 is made of, for example, Kovar, and is approximately the same as the thermal expansion coefficient of the ceramic sleeve 2 or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve. What is necessary is just to comprise from the material of.
As shown in FIG. 19, the hollow cylindrical body 91 of the hollow cylindrical protective metal fitting 90 is fitted into the third thick cylindrical portion 23 of the ceramic sleeve 2. The hollow cylindrical protective metal fitting 90 is a metal fitting made of Kovar having a concave cross-sectional shape in which a hollow cylindrical body 91 is provided at the edge of the circular body 92, and the inner side of the hollow cylindrical body 91 is the first. It is comprised so that it can fit in the 3 thick cylindrical part 23. FIG. In addition, the disc body 92 of the hollow cylindrical protection metal fitting 90 has a shape in which a through hole 93 having a diameter Rh (approximately the same length Rh as the second small acupuncture portion 15) from the center is formed. is doing. This hollow cylindrical protective metal fitting 90 is made of Kovar.
A third annular sealing bracket 7 is disposed in the small-diameter hole 12 of the partition flange 1, and one end of the third annular sealing bracket 7 is fixed to the partition flange 1. A fourth annular sealing metal fitting 8 is fixed to the convex portion 25 of the small diameter hole portion 12 of the ceramic sleeve 2. Then, the other ends of the third annular sealing metal fitting 7 and the fourth annular sealing metal fitting 8 are fixed to each other, so that the small diameter hole portion 12 of the partition wall flange 1 and the thin cylinder of the ceramic sleeve 2 are provided. The part 22 is sealed.
In the third embodiment, the shapes of the third annular sealing bracket 7 and the fourth annular sealing bracket 8 are characterized. First, the fourth annular sealing metal fitting 8 has a shape in which one end side is bent in a circular shape so that the side surface on the one end side faces the other end side.
Further, the third annular sealing metal fitting 7 is formed in such a shape that one end side thereof fits into a bent portion of the fourth annular sealing metal fitting 8.
Further, the third annular sealing bracket 7 has a shape in which the side surfaces of the folded portions of the fourth annular sealing bracket 7 are aligned when the folded portion on one end side is fitted to the folded portion of the fourth annular sealing bracket 8. Is formed.
Then, the bent portion of the third annular sealing fitting 7 and the bent portion of the fourth annular sealing fitting 8 are fitted to each other, and both sides of which the side surfaces are aligned are welded together. ing.
The outer peripheral surface of one end side of the third annular sealing metal fitting 7 is fixed to the inner peripheral surface of the small-diameter hole portion 12 of the partition flange 1 by, for example, TIG welding. On the flat surface of the convex portion 25 as a predetermined portion of the thin cylindrical portion 22 of the ceramic sleeve 2, the one end side inner peripheral surface of the fourth annular sealing metal fitting 8 is fixed by brazing, for example. Both surfaces of the one end side surface of the third annular sealing bracket 7 and the one end side surface of the fourth annular sealing bracket 8 are fixed by, for example, TIG welding.
The third annular sealing bracket 7 is made of, for example, SUS316L and has a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the partition flange 1 or within a certain range with respect to the thermal expansion coefficient of the partition flange 1. What is necessary is just to comprise from a material. The fourth annular sealing bracket 8 is made of, for example, Kovar, and has a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the ceramic sleeve 2 or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve 2. What is necessary is just to comprise from a material.
The double-sealed terminal header having the above-described structure is manufactured by a manufacturing method including the following manufacturing process.
<First processing step of partition flange 1 and ceramic sleeve 2>
In the manufacturing method according to the embodiment of the present invention, first, the shape of the partition flange 1 and the shape of the ceramic sleeve 2 are processed into predetermined shapes so that each component can be accommodated. Specifically, a predetermined shape is obtained in the next processing step of the partition flange 1 and the processing step of the ceramic sleeve 2.
[Process for partition wall flange 1]
In this processing step, the partition flange 1 is larger than the diameter Rb of the small meridian part 12 by a predetermined length Lh from the boundary F between the large meridian part 11 and the small meridian part 12 to the small meridian part 12 side. The second small acupuncture part 15 is formed by the longitude Rh.
[Processing of ceramic sleeve 2]
In this processing step, the ceramic sleeve 2 has a predetermined length Lj from the boundary between the thick cylindrical portion 21 and the thin cylindrical portion 22 toward the thick cylindrical portion 21 and a second thicker radius Rj than the thick cylindrical portion 21 by a predetermined radius Rj. A cylindrical portion 24 and a third thick cylindrical portion 23 are formed.
<Second processing step of first to fourth annular sealing metal fittings and hollow cylindrical protective metal fittings>
In the manufacturing method according to the embodiment of the present invention, each of the first to fourth annular sealing metal fittings 5 to 8 and the hollow cylindrical protective metal fitting 90 is then processed into a predetermined shape as shown in the above structure. . That is, the first annular sealing bracket 5, the second annular sealing bracket 6, the third annular sealing bracket 7, the fourth annular sealing bracket 8, and the hollow cylindrical protective bracket 90 are processed into a predetermined shape. To do. The processing steps for each component will be described in detail next.
[Processing of first annular sealing metal fitting 5]
The first annular sealing fitting 5 is formed in a cylindrical shape with substantially the same radius from one end portion to the other end portion, and the outer peripheral surface on one end side is fitted to the inner periphery of the large-diameter hole portion 11 of the partition flange 1. In addition, the inner peripheral surface of the other end is formed to have an inner diameter that fits with the outer peripheral surface of the other end of the second annular sealing metal fitting 6.
[Processing process of second annular sealing metal fitting 6]
The second annular sealing metal fitting 6 has an inner diameter in which a fixed length portion on one end side can be fitted into the second thick cylindrical portion 24, and a fixed length portion on the other end side on the other end of the first annular sealing fitting 5. It is formed in the shape fitted to the inner peripheral surface.
[Process of Fourth Ring Sealing Bracket 8]
In this processing step, as shown in FIGS. 1 to 20, the fourth annular sealing metal fitting 8 is bent in a circular shape so that one end side faces the other end side, as shown in FIGS. It is formed in a J shape.
[Processing of third annular sealing bracket 7]
The third annular sealing bracket 7 is formed in a shape in which one end side fits into a bent portion of the fourth annular sealing bracket 8. Further, the third annular sealing bracket 7 has a shape in which the side surfaces of the folded portions of the fourth annular sealing bracket 7 are aligned when the folded portion on one end side is fitted to the folded portion of the fourth annular sealing bracket 8. To form.
FIG. 20 is a process diagram for explaining the method for manufacturing a double-sealed terminal header according to the present invention. FIG. 20 (a) shows the first processing step, and FIG. 20 (b) shows the first process step. FIG. 20C shows the second processing step, and FIG. 20C shows the third processing step. 20A to 20C, only the upper half of the drawing from the center line O is shown.
<First treatment process>
Next, in the first processing step, the second annular sealing metal fitting 6, the hollow cylindrical abutting metal fitting 90, and the fourth annular sealing metal fitting 8 are arranged at predetermined positions of the ceramic sleeve 2, and then brazed. To do. Specifically:
FIG. 20A is a diagram for explaining the first processing step. In FIG. 20A, the second annular sealing metal fitting 6 is fitted into a predetermined position of the second thick cylindrical portion 24 of the ceramic sleeve 2 and positioned as shown in FIG.
The hollow cylindrical body 92 of the hollow cylindrical protective metal fitting 90 is fitted into the third thick cylindrical portion 23 of the ceramic sleeve 2 and positioned as shown in FIG.
The fourth annular sealing fitting 8 is fitted into the ceramic sleeve 2 and positioned as shown in FIG.
Next, the region 101 between the fourth annular sealing bracket 8 and the convex portion 25 of the ceramic sleeve 2, the inner peripheral surface of the second annular sealing bracket 6, and the second thick cylindrical portion 24 of the ceramic sleeve 2 are arranged. A region 102 between the outer peripheral surface and a region 103 between the inner peripheral surface of the hollow cylindrical body 92 of the hollow cylindrical protective metal fitting 90 and the outer peripheral surface of the third thick cylindrical portion 23 of the ceramic sleeve 2 are brazed. do.
<Second treatment process>
In the second processing step, after positioning the first annular sealing bracket 5 on the second annular sealing bracket 6 and the third annular sealing bracket 7 on the fourth annular sealing bracket 8, respectively. The one end side surface of the first annular sealing metal fitting 5 and the second annular sealing metal fitting 6 and the one end side surface of the third annular sealing metal fitting 7 and the fourth annular sealing metal fitting 8 are welded. Specifically:
FIG. 20B is a diagram for explaining the second processing step. In FIG. 20 (b), the first annular sealing bracket 5 is fitted into the second annular sealing bracket 6, and both end surfaces of the second annular sealing bracket 6 and the first annular sealing bracket 5. After positioning, both end surfaces 201 are welded.
When the bent portion on one end side of the third annular sealing bracket 7 is fitted and positioned on the folded portion of the fourth annular sealing bracket 8, the bent portion of the fourth annular sealing bracket 8 is positioned. Since the side surface and the side surface on the one end side of the third annular sealing member 7 are aligned, the aligned side surfaces 202 are welded.
<Third treatment process>
In the third processing step, the first annular sealing metal fitting 5, the second annular sealing metal fitting 6, the third annular sealing metal fitting 7, and the fourth annular sealing metal fitting 8 are attached. After the sleeve 2 is disposed in the through hole of the partition flange 1, the side surface of the end portion of the first annular sealing bracket 5 and the region 301 including the partition flange flange 1 are welded and the third annular sealing bracket 7 The region 302 including the end side surface and the partition flange 1 portion is welded. Specifically:
FIG. 20C is a diagram for explaining the third processing step. In FIG. 20 (c), when these are finished, the first annular sealing bracket 5, the second annular sealing bracket 6, the third annular sealing bracket 7, and the fourth annular sealing bracket 8 are provided. In the attached state, the ceramic sleeve 2 is fitted and positioned from the large meridian 11 side of the partition flange 1, and then a region 301 including the end side surface of the first annular sealing bracket 5 and the surface of the partition flange 1 is formed. Welding is performed to weld the region 302 including the side surface of the end portion of the third annular sealing fitting 7 and the surface of the partition flange 1.
The manufacturing method of the double sealing type terminal header is comprised including each said process process and a process process. Moreover, the double sealing type terminal header shown in FIG.1 and FIG.9 was manufactured by this manufacturing method.
According to the manufacturing method of the double sealed terminal header according to the third embodiment of the present invention, there are excellent effects as follows.
(1) Since the influence of the heat treatment process can be eliminated by adopting the above manufacturing process, it is possible to prevent deterioration of the welded portion of each annular sealing metal fitting.
(2) Since one end side surfaces of the fourth annular sealing metal fitting and the third annular sealing metal fitting face the other end side, the welding operation is remarkably easy.
(3) The hollow cylindrical body of the hollow protective metal fitting is fitted and brazed to the second thick cylindrical portion of the ceramic sleeve at the boundary between the thick cylindrical portion and the thin cylindrical portion of the ceramic sleeve. Since the ceramic sleeve and the partition flange are in contact with the ceramic sleeve through a hollow cylindrical protective fitting fixed by brazing, the ceramic portion does not directly contact the partition flange, so even if the ceramic sleeve is exposed to high pressure, Since stress concentration does not occur in the ceramic portion, the ceramic sleeve is not damaged or cracked, and a strong double sealed terminal header can be obtained.

DESCRIPTION OF SYMBOLS 1 Bulkhead flange 2 Ceramic sleeve 3 Annular long sealing tube 4 Center conductor 5 First annular sealing bracket 6 Second annular sealing bracket 7 Third annular sealing bracket 8 Fourth annular sealing bracket 9 Annular Short sealing tube 9a Annular short sealing tube 10 Through-hole 11 Large-diameter hole 12 Small-diameter hole 13 Space 15 Second small meridian 20 Space 21 Thick cylindrical portion 22 Narrow cylindrical portion 23 First concave portion (third thick) Cylindrical part)
24 2nd recessed part (2nd thick cylindrical part)
25 convex portion 26 through hole 31 annular flange 41 first convex portion 42 second convex portion 43 third convex portion 43a step portion C55, C57 annular sealing fitting L10 in the direction of the central axis O of the ceramic sleeve Length L20 Length of the convex portion 43 of the central conductor L30 Total length of the annular long sealing tube Li and the annular short sealing tube length Ls α10 Thermal expansion coefficient of the ceramic sleeve α20 Thermal expansion coefficient of the central conductor α30 Circular length Coefficient of thermal expansion of long sealed tube and annular short sealed tube 90

Claims

A double-sealed terminal header used in a penetration part of a low-temperature tank for storing liquefied natural gas or the like, which is fixed so as to close the penetration part and has a predetermined thickness and has a through-hole. Sealing is required, including a flange, a ceramic sleeve formed in a hollow cylindrical shape and inserted and fixed in a through hole formed in the partition flange, and a conductor inserted and fixed in the hollow portion of the ceramic sleeve In double-sealed terminal headers, which are formed by sealing various parts with a sealing material,
The through hole provided in the partition flange is
A large-diameter hole drilled from the central axis to the first radius with a predetermined first length from the first side surface in contact with the low temperature and high pressure side toward the second side surface in contact with the room temperature and atmospheric pressure side And
A small diameter formed from the second side surface side to the first side surface side to the large diameter hole portion and having a radius smaller than the radius of the large diameter hole portion and formed from the central axis to the second radius. With holes,
The ceramic sleeve is formed into a hollow cylindrical body having a predetermined length,
The part in contact with the low temperature pressure side is formed with a predetermined length with an outer diameter slightly smaller than the inner diameter of the large-diameter hole portion of the partition flange, and has an outer shape that fits into the large-diameter hole portion of the partition flange with a predetermined gap. 1 outer diameter part,
A second portion having an outer shape that is formed in a predetermined length with a radius slightly smaller than the inner diameter of the small-diameter hole portion of the partition flange, and that fits into the small-diameter hole portion of the partition flange with a predetermined gap. An outer diameter portion, and a ceramic sleeve is fitted in the through hole of the partition flange,
Fixing one end of the first sealing fitting at a predetermined position on the inner peripheral surface of the large-diameter hole of the partition flange;
Fixing one end of the second sealing fitting to a predetermined position of the first outer diameter portion of the ceramic sleeve, and fixing the other end of the first sealing fitting and the other end of the second sealing fitting; Become
One end of the third sealing fitting is fixed to a predetermined position on the inner peripheral surface of the small-diameter hole of the partition flange, and a fourth sealing fitting is fixed to a predetermined position on the second outer diameter portion of the ceramic sleeve. ,
A double-sealed terminal header, wherein the other end of the third sealing bracket and the other end of the fourth sealing bracket are fixed.
One end outer peripheral surface of the first annular sealing metal fitting is fixed to the inner peripheral surface of the large-diameter hole portion of the partition flange, and the second annular sealing metal fitting is inserted into a second recess provided in the ceramic sleeve. The peripheral surface is fixed, and the other end inner peripheral surface of the first annular sealing bracket 5 and the other end outer peripheral surface of the second annular sealing bracket 6 are the large-diameter hole portion and the small-diameter hole portion of the first recess. Is fixed at the boundary position of
One end outer peripheral surface of the third annular sealing bracket is fixed to the inner peripheral surface of the small-diameter hole portion of the partition flange, and the fourth annular sealing bracket is one end inner peripheral surface of the convex portion provided on the ceramic sleeve. The other end inner peripheral surface of the third annular sealing bracket and the other end outer peripheral surface of the fourth annular sealing bracket are formed between the large-diameter hole portion and the small-diameter hole portion on the low-temperature pressure side from the convex portion. 2. The double sealed terminal header according to claim 1, wherein the double sealed terminal header is fixed at a boundary position.
The first sealing metal fitting and the third sealing metal fitting are made of a material having a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the partition flange or within a certain range with respect to the thermal expansion coefficient of the partition flange. The double-sealed terminal header according to claim 1 or 2, characterized in that:
The second sealing metal fitting and the fourth sealing metal fitting are made of a material having a thermal expansion coefficient that is substantially the same as the thermal expansion coefficient of the ceramic sleeve or within a certain range with respect to the thermal expansion coefficient of the ceramic sleeve. The double-sealed terminal header according to claim 1 or 2, characterized in that:
In the double-sealed terminal header used for the penetration part of the cryogenic tank that stores liquefied natural gas,
Concentrically with the central axis, the central conductor, annular sealing tube, and ceramic sleeve are arranged in this order from the central axis side. The annular sealing tube is formed in a cylindrical shape with a predetermined length and a predetermined thickness in the central axis direction by Kovar on the outer periphery of the central conductor, and the ceramic sleeve is formed on the outer periphery of the annular sealing tube. It is formed in a cylindrical shape with a predetermined length and a predetermined thickness in the central axis direction, and the ceramic sleeve is integrated with a low-temperature tank fixing partition flange,
The annular sealing tube is formed with an inner diameter that maintains a predetermined gap between the inner peripheral surface and the outer peripheral surface of the central conductor, and the ceramic sleeve has a predetermined gap between the inner peripheral surface and the Kovar outer peripheral surface. It is formed on the inner diameter where the gap is maintained,
And the said center conductor, a sealing pipe | tube, and a ceramic sleeve are the double sealing type terminal headers supported by the support structure in the predetermined position,
The central conductor forms a convex portion at a portion located on the normal temperature and atmospheric pressure side when installed in the penetration portion of the low-temperature tank, and the convex portion has a first length in the central axis direction and is sealed Formed to the same outer diameter as the outer diameter of the pipe,
The annular sealing tube is composed of an annular long sealing tube and an annular short sealing tube, and the annular long sealing tube is formed to have a second length in the central axis direction and is a convex portion of the central conductor. It is arranged in a region on the lower temperature and high pressure side and is attached to the convex portion of the central conductor by a support structure, and the annular short sealing tube is formed in a third length in the central axis direction to form the central conductor. Arranged in the region on the room temperature and atmospheric pressure side from the convex part, and attached to the convex part of the central conductor with a support structure,
The first length in the central axis direction of the convex portion of the central conductor, the second length in the central axis direction of the annular long sealed tube, and the third length in the central axis direction of the annular short sealed tube The total length of the ceramic sleeve and the length in the central axis direction of the ceramic sleeve,
And the expansion value in the central axis direction due to thermal expansion and thermal contraction of the annular long sealing tube and the short annular sealing tube and the expansion value in the central axis direction due to thermal expansion and thermal contraction of the convex portion of the central conductor The length of the convex portion of the central conductor and the annular seal are such that the added value of the ceramic sleeve and the expansion / contraction value in the central axis direction due to thermal expansion and contraction of the ceramic sleeve are maintained within substantially the same or constant range. A double-sealed terminal header, characterized in that the length of the receiving tube and the length of the ceramic sleeve are set to predetermined lengths, respectively.
The first length in the central axis direction of the convex portion of the central conductor is set to approximately 20.8% of the length in the central axis direction of the ceramic sleeve,
And the total length of the second length in the central axis direction of the annular long sealed tube and the third length in the central axis direction of the annular short sealed tube is the total axial direction of the ceramic sleeve The double-sealed terminal header according to claim 5, wherein the length is set to approximately 79.2% of the length.
The length in the central axis direction of the ceramic sleeve is L10, its thermal expansion coefficient is α10, the first length in the central axis direction of the convex portion of the central conductor is L20, its thermal expansion coefficient is α20, and When the total length of the second length in the central axis direction of the annular long sealed tube and the third length in the central axis direction of the annular short sealed tube is L30, and the coefficient of thermal expansion is α30,
L10 = L20 + L30
L10 × α10 = (L20 × α20) + (L30 × α30)
The double-sealed terminal header according to claim 5 or 6, wherein the relationship is established.
In the manufacturing method of the double-sealed terminal header used in the penetrating part of the low temperature tank for storing liquefied natural gas etc.,
A first processing step of processing the shape of the partition flange and the ceramic sleeve into a predetermined shape;
A second processing step of processing the first annular sealing bracket, the second annular sealing bracket, the third annular sealing bracket and the fourth annular sealing bracket, and the hollow cylindrical protective bracket;
A first processing step in which the second annular sealing metal fitting, the hollow tube type metal fitting and the fourth annular sealing metal fitting are arranged at predetermined positions of the ceramic sleeve and then brazed;
The first annular sealing bracket is positioned and positioned on the second annular sealing bracket, the third annular sealing bracket is positioned and positioned on the fourth annular sealing bracket, and the first annular sealing bracket is positioned. A second processing step of welding one end side surface of the sealing metal fitting and the second annular sealing metal fitting and one end side surface of the third annular sealing metal fitting and the fourth annular sealing metal fitting,
After the ceramic sleeve is disposed in the through hole of the partition flange with the first annular sealing bracket, the second annular sealing bracket, the third annular sealing bracket and the fourth annular sealing bracket attached. And a third processing step of welding the end side surface of the first annular sealing bracket and the partition flange and the end side surface of the third annular sealing bracket and the partition flange, respectively. A manufacturing method for a stationary terminal header.
The second processing step is a processing step of bending the one end side of the fourth annular sealing fitting into a circular shape so that the side surface of the one end side faces the other end side, and forming a substantially J-shaped cross section;
The one end side of the third annular sealing bracket is formed in a shape that fits into the bent portion of the fourth annular sealing bracket, and the bent portion on the one end side of the third annular sealing bracket is the fourth 9. The double-sealed terminal according to claim 8, further comprising a processing step in which the side surfaces of the bent portions are aligned when fitted to the bent portions of the annular sealing metal fitting. Header manufacturing method.
The double sealing according to claim 8, wherein the second processing step includes a step of fitting and brazing the hollow cylindrical body of the hollow cylindrical protective metal fitting to the third thick cylindrical portion of the ceramic sleeve. A manufacturing method for a stationary terminal header.