JPH0620337B2 - Penetration device for electric cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention provides a seal assembly at one end of an embedding pipe that penetrates a partition body, and embeds a plurality of electric cables through the seal assembly. The present invention relates to an electric wire cable penetrating device for insertion into a pipe.

[Conventional technology]

2. Description of the Related Art Conventionally, an electric wire cable penetrating device in a plant such as a nuclear power plant is provided with a sealed structure such as an aluminum, steel or stainless steel tube as an electric wire cable supporting member in an embedded pipe. A large number of electric wires and cables are inserted and supported in a pipe having a simple sealed structure. However, the conductor temperature of the electric wire cable rises with the passing of electric current, and when a large number of electric wire cables are arranged in the support member consisting of a pipe with a sealed structure as described above, the temperature inside the pipe rises abnormally. However, the heat may accumulate in the pipe and damage the insulation of the electric cable.

As a measure against this kind of heating, SAIkai 61-148
As disclosed in Japanese Unexamined Patent Publication No. 22-22, there has been proposed an electric wire cable penetrating device in which a plurality of heat dissipation holes are formed in a tubular cable supporting member.

[Problems to be solved by the invention]

In the conventional electric wire cable penetrating device as described above, the heat radiation effect is not sufficient only by forming a hole in the tubular cable supporting member, and since it is tubular, the cable wiring work at the installation site is troublesome.

Further, in the prior art, when welding the embedded pipe and the seal assembly in the field, welding sparks or the like may enter the inside of the embedded pipe and damage the electric wire cable in the embedded pipe. Furthermore, the heat effect on the electric cables due to welding heat cannot be ignored.

As a countermeasure against this, conventionally, there is one in which a fireproof seal or the like is wound around the outside of the electric wire cable, but removing these fireproof seals from the inside of the embedded pipe for field welding does not cause physical interference with the cable support member or There are many problems such as being unfavorable from the viewpoint of an external force applied to the electric wire cable, and requiring a lot of time and labor for the electric wire cable wiring work at the installation site.

The present invention has been made to solve the above-mentioned problems, and can efficiently dissipate the heat of an electric wire cable, prevent the electric wire cable from sparks or the like at the time of on-site welding, and further perform an electric wire cable laying work easily. The purpose is to obtain a penetrating device for electric wire cables.

[Means for solving problems]

The electric wire cable penetrating device according to the present invention has an electric wire cable support member, which extends substantially parallel to the embedded pipe and is formed in a gutter shape, disposed inside the embedded pipe, and the electric wire cable support member is supported by the support legs inside the embedded pipe. It is supported in the embedded pipe so as to be located at a distance from the peripheral surface, a plurality of electric wire cables are placed on the electric wire cable support member, and at the same time, to connect the embedded pipe and the seal assembly, A protective tube that is approximately parallel to the embedded tube,
It is supported on the inner surface of the embedded pipe and the seal assembly.

[Work]

In the present invention, the gutter-shaped cable supporting member keeps the electric wire cable in a laid state in which heat is easily dissipated in a state of being arranged in the embedded pipe, and is supported in the embedded pipe so as to save the installation work. In addition, the protection tube, which is arranged to connect the seal assembly and the embedded pipe, prevents the welding sparks from damaging the wire cable when the seal assembly is welded to the embedded pipe. It also functions as a positioning device that facilitates the welding of the seal assembly and the embedded pipe, and contributes to the improvement of workability on site construction.

〔Example〕

1 to 4 show an embodiment of the present invention. In FIG. 1, a concrete partition wall (1) having a large width is
For example, it is formed integrally with the reactor containment wall (2), the embedded pipe (3) is embedded in the partition wall (1), and a large number of electric cables (7) are embedded in the embedded pipe (3). ) Is inserted. At one end of the embedding pipe (3), for example, at the rear end inside the container wall (2), a coupling sleeve (4), an end plate (5) and a wire penetrating element (constituting a seal assembly (20) ( 13) is welded in an airtight state. The end plate (5) is provided with three wire penetration elements (13),
Attach the wire feed-through element (13) to the end plate (5) using the fixing ring (1
4) via the fixing plate (15) and the fixing bolt (15a).

A protective tube (6) is supported so as to be inscribed between the fitting sleeve (4) and the embedding tube (3), and the protection tube (6) is previously fixed to the fitting sleeve (4). In this state, the fitting sleeve (4) is inserted into the embedding pipe (3) and the embedding pipe (3) is welded.

A large number of electric cables (7) extending from each wire penetrating element (13) into the embedded pipe (3) pass through the embedded pipe (3) and reach the inside of the other container. In (), it is supported by a gutter-shaped electric wire cable support member (8). The cable supporting member (8) is provided with three members made of, for example, stainless steel, steel, aluminum or the like, and the supporting leg (9) and the supporting rod (10) are provided from the inner peripheral surface of the embedded pipe (3). ),
The support nut (11) and the pin (12) are arranged at a distance from each other and extend substantially parallel to the embedding tube (3).

As shown in FIG. 2, the cable support member (8) is formed in an upper half-open cylindrical shape. Three cable support members, one in the upper part and two in the lower part of the embedded pipe (3)
The (8) is integrally connected by a supporting leg (9). The cable support member (8) is fixed to the inner peripheral surface of the embedding pipe (3) by a lower support rod (10) and a pair of left and right adjusting screw rods (16). That is, the lower support rod (10) extends downward and the lower end of the support rod (11) is attached, and the support nut (11) is pressed against the bottom of the inner peripheral surface of the embedding pipe (3). ing. On the other hand, the adjusting screw rods (16) on the upper side each extend radially obliquely upward and to the left and right, and the adjusting nuts (12) are attached to the upper ends of the adjusting nuts (12), and the adjusting nuts (12) are embedded in the embedded pipe (3). Is pressed against the inner surface of the.

FIGS. 3 and 4 show the details around the seal assembly (20). The end plate is different from the embedding pipe (3) embedded in the partition wall (1) and the containment vessel wall (2). (5) Mating sleeve welded to
(4) is welded at the weld (19).

The protection tube (6) is inserted into the fitting sleeve (4) substantially parallel to the fitting sleeve (4) and fixed to the end plate (5) with a set screw (17). The guide flange (18) formed at the other end of the protection pipe (6) is in contact with the inner peripheral surface of the embedded pipe (3).

The three wire penetration elements (13) attached to the end plate (5) are fixed rings (14) attached to the wire penetration element (13).
In the section, it is pressed against the end plate (5) with a fixing bolt (15a) via a fixing plate (15). The electric wire cable (7) penetrates the electric wire penetrating element (13) and reaches the inside of the storage container via the inside of the protective tube (6).

With the above configuration, the heat of the electric wire cable (7) is quickly dissipated upward without staying in the cable support member (8). Moreover, since the allowable current of the electric wire cable (7) can be set to a large value, the design margin is increased.

Furthermore, by installing the protective tube (6), the welding sparks of the welded part (19) are damaged to the electric wire cable (7) during the on-site welding of the embedded tube (3) and the mating sleeve (4). To prevent giving
The influence of welding heat can also be prevented, and further the connecting sleeve
When aligning (4) with the embedded tube (3) and aligning the groove, a protective tube
(6) will be a guide to improve the workability of on-site welding.

The wire and cable support member (8) has an upper adjustment nut (12)
By loosening, it becomes possible to slide in the front-back direction, so loosen the adjustment nut (12)
Insert (8) into the embedded pipe (3) and adjust the position in the front-back direction. After that, the adjustment nut (12) is rotated to press the adjustment nut (12) against the inner peripheral surface of the embedded pipe (3), so that the cable support member (8) is fixed to the embedded pipe (3).

In the above embodiment, the electric wire cable support member (8) is formed in a half-split tubular shape in cross section, but may be formed in various gutter shapes such as an open-ended rectangular box shape or a half split elliptic cylinder. You can Also, a large number of holes may be provided in the gutter.

Furthermore, the protection tube (6) has a structure other than that attached to the end plate (5).
Cylinder with approximately the same outer diameter as the inner diameter of the embedded pipe (3), with a fitting sleeve
It is also conceivable to adopt a structure in which (4) and the inner peripheral surface of the embedded pipe (3) are pressed against each other.

〔The invention's effect〕

 As described above, the present invention has the following effects.

(a) Since the electric wire cable support member (8) is formed in a gutter shape and is arranged at a distance from the inner peripheral surface of the embedded pipe (3),
The heat from the electric wire cable (7) can be efficiently dissipated, so that there is no fear that the heat will damage the insulating coating of the electric wire cable (7).

(b) Since the heat from the electric wire cable (7) can be efficiently dissipated, the allowable current of the electric wire cable (7) can be set to a large value, which increases the design margin of wiring and the like. And the like can be easily designed.

(c) Since the electric wire cable support member (8) is opened upward, the electric wire cable (7) can be stored in the cable support member (8) at once from above, and cable laying at the site is easy and work efficiency is improved. To do.

(d) By providing the protective tube (6), the cable (7) can be protected from the sparks etc. at the time of on-site welding (19), and the connecting sleeve (4)
The installation work of is easy, and the work efficiency is improved in this respect as well.

[Brief description of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional view,
FIG. 2 is a sectional view taken along the line II-II of FIG.
The drawing is a partial detailed vertical sectional view of FIG. 1, and FIG. 4 is a left side view of the one shown in FIG. (1) ...... Partition wall, (3) ...... Embedded tube, (4) ...... Connecting sleeve, (5) ...... End plate, (6) ...... Protective tube, (7) ...... Electric wire cable, (8) …… Cable support member, (9) …… Support legs, (13)
...... Wire penetration element, (19) …… Field weld, (20) ……
Seal assembly. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] 1. A wire cable penetrating device, wherein a seal assembly is provided at one end of an embedded pipe penetrating a partition wall body, and a plurality of electric cables are inserted into the embedded pipe through the seal assembly. An electric wire cable support member formed in a trough shape and arranged in the buried pipe so as to extend substantially parallel to the buried pipe,
Support legs for supporting the electric wire cable supporting member in the embedding pipe so as to be spaced from the inner surface of the embedding pipe, a plurality of electric cables mounted on the electric wire cable supporting member, and the embedding device. An electric wire cable penetrating device, comprising: a protective tube that is provided substantially parallel to a tube and that supports the seal assembly and the embedded tube. 2. The electric wire cable penetrating device according to claim 1, further comprising an electric wire cable support member having an upwardly opening half-cylindrical shape.