JPH0444488B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a long bus duct for vertical installation, which is installed vertically in buildings such as buildings and factories, and is used as power distribution lines.

(Prior art) When using a conventional bus duct as a main line in a building, as shown in Figure 1, a bus duct 1 with a standard length of approximately 3 m, close to the floor height, is connected to the through hole 3 of each floor 2. The bus ducts 1 are vertically penetrated and supported by spring hangers 4 on each floor 2, and the upper and lower bus ducts 1 are successively connected at a joint part 5. At this time, each bus duct 1
In order to absorb the amount of thermal expansion and contraction, expansions 6 were connected in series at appropriate intervals. Note that 7 is a plug-in type branch section for branch connection.

Conventionally, each bus duct 1 was connected on-site, which required connection work to form the joint portions 5 every 3 m, which was very time-consuming, and the reliability of the connections was poor due to on-site work. There was a drawback that the performance was likely to be low. . Further, since the conventional bus duct 1 cannot absorb the amount of expansion and contraction by itself, it has had the disadvantage that the conductors of each phase must be connected to each other by slide connection to absorb the amount of expansion and contraction.

(Object of the Invention) An object of the present invention is to provide a long bus duct for vertical installation that can reduce the number of connection points on site, omit expansion connections, and is easy to construct.

(Structure of the Invention) The long bus duct for vertical installation according to the present invention has a rigid body section in which a rigid box is attached and fixed in the longitudinal direction of a plurality of long insulated conductors arranged in parallel, and a flexible bus duct without a rigid body box. The device is characterized in that flexible portions with elasticity are provided alternately, and adjacent rigid portions are connected to each other by tension members.

(Example) Examples of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 2 to 4, the long bus duct 9 for vertical installation of this embodiment includes a long insulated conductor 10 formed by covering a flexible long rectangular conductor 10A with an insulation coating 10B. The length of the bus duct is longer than that of a conventional fixed-length bus duct, and two phases are stacked in parallel. Rigid boxes 11 are fixedly attached to the outer periphery of the aggregate of these long insulated conductors 10 at intervals in the longitudinal direction. The rigid body part 12 having the rigid body box 11 and having no flexibility and the flexible body part 13 having flexibility but not having the rigid body box 11 exist alternately in the longitudinal direction. ing. Further, two tension members 14 are longitudinally attached to these long insulated conductors 10 over the entire length, and these tension members 14 are attached to the rigid box 1 of each rigid body part 12 by means of fixing fittings 15.
It is fixed at 1. Therefore, the adjacent rigid body part 1
2 is a tension member 14 with a flexible portion 13 in between.
are connected. As the tension member 14, for example, a wire rope or a fiber-reinforced plastic wire is used. Rigid body box 11 of each rigid body part 12
are each provided with a plug-in type branch section 16 for branch connection. Note that 17 is a connection box provided at one end of this long bus duct 9.

For example, such a long bus duct 9 has a total length of
Manufactured to a length of approximately 50m. If this length is used as a main line in a general building, one strip length will be sufficient. When transporting such a long bus duct 9, the second
As shown in the figure, by bending the flexible portion 13 and folding it into an S-shape, it becomes a small package and can be easily transported.

Figures 5 and 6 show a long bus duct 9 of the present invention.
This is an example of a vertically installed main line of a building. That is, the long bus duct 9 is installed by passing through the through holes 3 of each floor 2 of the building so that each rigid body part 12 passes through each, as shown in the figure, and the gaps between the through holes 3 are filled with concrete, etc. The rigid box 11 is fixed to each floor 2 by directly embedding the fireproof seal 7 and performing sealing. When installing the long bus duct 9 perpendicularly to a building, for example, lower the hoisting wire from the top floor where it will be laid, connect its lower end to the tension member 14 at the upper end of the long bus duct 9, and then use a winch or the like to lower the hoisting wire. It is rolled up so that the long bus duct 9 stands up. In this way, the start-up work can be performed without applying tension to the long insulated conductor 10, and the long bus duct 9 can be protected from tension during installation.

When the long bus duct 9 of the present invention is installed vertically in this manner, the flexible portion 13 functions as an expansion, so that the connection of the expansion can be omitted. In this case, it is preferable to bend the flexible portion 13 in advance as shown in the drawings, as this allows for easy absorption of thermal expansion and contraction. If you attach tension member 14,
It is possible to prevent the bending portion of the flexible portion 13 from being stretched due to a large tension being applied to the bending portion during upright installation. Further, according to the vertical installation of the long bus duct 9, the upper flexible portion 13
However, in the present invention, since the tension member 14 is present, tension does not directly act on the flexible portion 13, and the flexible portion 13 can be safely protected. .

Note that it is preferable that the flexible portion 13 be protected by appropriate protection means so as not to impair its flexibility.

Alternatively, the tension member 14 may be present only at the flexible portion 13 and both ends may be connected to the rigid portion 12.

(Effects of the Invention) As explained above, the long bus duct for vertical installation according to the present invention includes a rigid body part to which a rigid body box is attached and fixed in the longitudinal direction of a plurality of long insulated conductors installed in parallel, and a rigid body part. Because it has a structure in which flexible parts are provided alternately, it can be made into any length, and even if it is made long, it can be folded to make it compact and easy to transport. I can do it. Furthermore, according to the present invention, the number of joints formed on site can be reduced by increasing the length, and the installation can be carried out efficiently. Furthermore, since the flexible portion acts as an expansion, the connection portion of the expansion can be omitted. In addition, especially in the present invention, since the rigid body parts on both sides of the flexible part are connected by a tension member, this tension member prevents a large tension from acting on the flexible part due to an increase in its own weight due to an increase in length. It is possible to effectively protect the flexible portion during initial installation and during use after installation, and to solve the problems associated with elongation.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the conventional bus duct installation.
FIG. 2 is a front view of an embodiment of the long bus duct according to the present invention in a folded state, and FIG. 3 is a front view taken along line X-X in FIG.
4 is a cross-sectional view taken along the Y-Y line in FIG. FIG. 7 is a partially enlarged view showing a state protected by a tension member. 2 is a floor, 3 is a through hole, 9 is a long bus duct, 10 is a long insulated conductor, 11 is a rigid box, 12 is a rigid part, 13 is a flexible part, and 14 is a tension member.

Claims (1)

[Claims] 1. A plurality of long insulated conductors arranged in parallel are provided with a rigid part to which a rigid box is attached and fixed in the longitudinal direction, and a flexible part without a rigid box, which is provided alternately and adjacent to each other. A long bus duct for vertical installation, characterized in that each rigid body part is connected to each other by a tension member.