JPH01200586A - Manufacture of penetrating device for accommodation vessel conductor - Google Patents

Abstract

PURPOSE:To provide air-tightness and simplify component members, when insulative plates and conductors penetrating it are sealed air-tightly by a thermo- hardening resin, by performing hardening of the thermo-hardening resin through application of a pressure in the axial direction of the conductor. CONSTITUTION:A plurality of conductors 13 penetrate insulative plates 9, 9 inserted into a ring-shaped header 5 and fixed thereto, and the part of penetration is filled with a thermo-hardening resin 2 so as to provide air-tightness. A tubular surrounding member 8 is fixed to both sides of this ring-shaped header 5, and the thermo-hardening resin 2 is injected till middle level of this surrounding member 8 and hardened. Within a pressurized vessel 20, a pressure by nitrogen gas is applied to the injected thermo-hardening resin 2 in the surrounding member 8 above and below alternately in the axial direction of the conductors 13, or otherwise a similarly axial-directed pressure is applied by the use of a disc for pressurization 26. Therefore, the resin 2 does not present contraction in the radial direction of the surrounding member 8, wherein hardening can be made without using any complicated device to ensure that air-tightness is held.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a containment vessel conductor penetration device that is applied to sealingly pass a conductor into a containment vessel such as a nuclear reactor.

[Conventional technology]

4 and 5 show a conventional method of airtightly adhering a metal outer cylinder and a thermosetting resin, as disclosed in, for example, Japanese Patent Publication No. 46-28464. In FIG. 4, a thermosetting resin 2 such as an epoxy resin is injected into a metal 81 and hardened.

When this thermosetting resin 2 is cured, an inward contraction force is generated, a gap 3 is created, and airtightness is impaired.

In order to solve this problem, as shown in FIG. 5, a thin metal tube 4 having removability is airtightly fixed to the inner surface of the metal outer tube. A thermosetting resin 2 is injected into the metal outer station 1 in this state and hardened. This resin 2 contracts inward when it hardens, but the gold M cylinder 4 is deformed inward accordingly, and the resin 2
Close contact is maintained. In this case, even if the resin 2 on the outer circumferential side of the gold M cylinder 4 peels off from the inner surface of the outer cylinder 1, the metal outer cylinder 4
Since one end of the metal tube 4 is fixed to the inner surface and the resin 2 is adhered to the metal tube 4, the airtightness of the interior is maintained.

FIG. 6 is a longitudinal cross-sectional view of another conventional containment vessel conductor penetration device disclosed in Japanese Patent Publication No. 54-33357, to which the technique shown in FIG. 5 is applied. In the figure, reference numeral 5 denotes an annular header member, which is provided with a hole 6 for monitoring the reservoir, and an O cylinder g7 provided on the outer periphery. Reference numeral 8 denotes a tubular enclosure member made of a metal material that is welded and fixed to both ends of the header member 5, and 9 is a pair of insulating discs fixed to the inside of the header member.
An insulating spacer 10 is inserted between the two, and a leak monitoring chamber 11 is formed.
is formed. Reference numeral 12 denotes an annular sealing shroud made of a thin metal material that is airtightly fixed to the inner surfaces of both tubular enclosure members 8 by welding or the like, and corresponds to the metal cylinder 4 in FIG. 5 above. 13 is 24 bodies that pass through the insulating disk 9.

The thermosetting resin 2 is injected into the center of the annular header 5 and one of the enclosing members 8 in this state and hardened.

Then, the thermosetting resin 2 is injected into the center of the other enclosing member 8 and hardened. Cables 14 are connected to both ends of the conductor 130 with compression sleeves (not shown), and are covered with shrink tubes 15. After this, one enclosure g8
Thermosetting resin 16 is sequentially injected into the inside and the inside of the other enclosing member 8 and hardened. Due to the interposition of the sealing shroud 12 fixed within the enclosure member 8, the hardened and shrunk resin 2 is kept in close contact with the sealing shroud 12, without creating any gaps, and an airtight seal is maintained.

[Problem to be solved by the invention]

In the conventional containment vessel conductor penetration device described above, it was necessary to install the annular candy shrac 12 within the tubular enclosure member 8 to maintain airtightness. Furthermore, there is a problem that there is a risk of cracks occurring inside the cured resin, and it is not possible to maintain airtightness completely.

The present invention was made to solve these problems, and an object of the present invention is to provide a method for manufacturing a containment vessel conductor penetration device that has a simple structure and can maintain airtightness with high reliability.

[Means to solve the problem]

A shielding method for a containment vessel conductor penetration device according to the present invention includes:
Tubular enclosure members are secured on both sides of the annular header, a conductor is passed through the insulating disk that is inserted and fixed into the annular header, and after injecting thermosetting resin into the inner part of one tubular enclosure member, it is inserted from the outside in the axial direction. The thermosetting resin is then injected into the center of the other tubular enclosing member, and then heated and cured while applying pressure from the outside in the axial direction. ] In this invention, the thermosetting resin injected into the inner part of the tubular enclosure member contracts during curing, but since pressure is applied from the outside, it contracts in the axial direction and shrinks in the radial direction. This eliminates the need for a conventional annular sealing shroud to eliminate gaps with the inner surface of the tubular shroud and the occurrence of internal cracks.

〔Example〕

FIG. 1 is a cross-sectional view showing an embodiment of the method for manufacturing a containment vessel conductor penetration device according to the present invention, and shows 2j5 to 11, 13.
is the same as the conventional device described above, but has tubular enclosure members 8 on both sides of the annular ladder 5. 111t i, a pair of insulating discs 9 are inserted and fixed inside the annular header 5. A plurality of conductors 13 penetrate this insulating disk 9. In this state, the thermosetting resin 2 is injected into the tubular enclosure member 8 from above up to the middle height.

The conductor Xn device in this state is immediately placed in the pressurized container 20, and the lid 21 is hermetically sealed with the bolts 22. 23 is a nitrogen cylinder, a pipe 24 is connected between it and the lid 21, and a pressure regulating valve 25 is attached to the pipe 24. The pressure regulating valve 25 is opened and nitrogen gas is injected into the pressurized container 20 to apply the required pressure.

When the thermosetting resin 2 is heated and cured, since the resin 2 is pressed out from above in the axial direction, it contracts downward in the axial direction.
It does not shrink in the radial direction. Therefore, the cured resin 2
The airtight contact with the inner surface of the surrounding member 8 is maintained.

In this way, when the central part of one of the enclosure members 8 is hermetically sealed with the resin 2, it is pulled out from inside the pressurized container 20 and one of the enclosure members 8 is inverted downward. The thermosetting resin 2 is injected into the other upper enclosing member 8 and refilled to the middle height.

Immediately, the calyx-body connection device in this state is placed in a pressurized container 20 as shown in FIG. 2, sealed, and pressurized with nitrogen gas.
The upper filling resin 2 is subjected to a heat curing treatment at the cutting edge.

The semi-finished conductor The curable resin 16 is injected into the space on the end side and heat-cured in this order. Since airtightness is not important for this resin 16, there is no need to put it in the pressurized container 20.

Note that the gas to be pressurized does not need to be nitrogen gas, and
The shape of the pressurized container 20 is not limited to the shape shown in FIG.

FIG. 3 shows an embodiment of the pond according to the present invention, which is a method of pressurizing the pond without using a pressurizing container 2o. A pressurizing disk 26 of a required weight is placed on the shrunkable resin 2 injected to the middle height of one of the enclosure members 8.

This disk 26 is provided with a hole 26a through which each conductor 13 escapes. In this way, while applying pressure in the axial direction to the uncured resin 2, heat curing treatment is performed on the resin 2 on the side of the plume.
After completing the hermetic sealing process, turn the conductor penetration device over and
The other upper enclosure member 8 is hermetically sealed with resin 2 in the same process as above.

〔Effect of the invention〕

As described above, according to the present invention, a thermosetting resin is injected into the outer side of the tubular enclosing members on both sides of the annular header, and the filled resin is pressurized from above in the axial direction to cure the thermosetting resin. As the resin is cured, it contracts in the axial direction, does not contract in the radial direction, and adheres to the inner surface of the enclosure member in an airtight manner for a long time to maintain an airtight seal without causing any cracks inside.
A conventional annular sealing shroud can be omitted.

[Brief explanation of the drawing]

1 and 2 are vertical cross-sectional views showing a method for manufacturing a containment vessel conductor penetrating device according to the present invention in the order of steps, and FIG. 3 is a cross-sectional view showing a method for manufacturing a conductor penetrating device according to another embodiment of the present invention. Figures 4 and 5 are vertical Vr plane views showing each side of the conventional airtight sealing method between a metal outer cylinder and a thermosetting resin, and Figure 6 is a half view showing a conventional conductor penetration device. 0 2...Thermosetting resin, 5... Annular header, 8...
Tubular enclosure member, 9... Insulating disc, 13... Conductor, 2
0... Pressurized container, 23... Nitrogen cylinder, 26...
Pressurizing disk Note that the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Claims] A tubular enclosing member is fixed to both sides of the annular header, and a conductor is passed through an insulating disc inserted and fixed inside the annular header.
With the above-mentioned one tubular enclosing member side facing upward, thermosetting resin is injected to the middle part thereof, and the filled resin is heated and cured while being pressurized from above by a pressure means, and then,
The other tubular enclosure member side is turned upward, thermosetting resin is press-fitted up to the middle part, and the filled resin is heated and cured while being pressurized from above with a pressure means, and the through-hole of the conductor is sealed. A method for manufacturing a containment vessel conductor penetration device for airtight sealing.