JPS6110435Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a wiring bundling device that is particularly applicable to nuclear power plants and is capable of maintaining separation and independence between multiplexed wiring even in the event of a short circuit accident.

Nuclear power plants are designed to have multiple systems related to the safety protection operations of nuclear reactor equipment, so that even if a failure occurs in one system, the safety protection function can be performed by the operation of other systems.

There are also two electrical systems installed, from equipment to wiring cables. (Hereinafter, these two systems will be referred to as Tren A and Tren B, respectively.)
On the other hand, due to plant safety requirements, it is necessary to take measures to ensure that both systems are as independent as possible from each other in order to avoid simultaneous failures. ), and even in such cases, other systems are required to maintain their normal functions.

This also applies to the internal wiring of switchboards, etc. If there are two systems, Trane A and Trane B, in one switchboard, for example, if a short circuit occurs in the wiring on the Trane A side, that wire will be overloaded. Physically separate and route the wires so that even if they overheat, the wiring on the train B side will not be affected in any way, and also secure them in a way that can withstand accidents. The wires must be fixed in a way that does not deteriorate their properties.

Therefore, conventional devices of this type are shown in Figures 1 and 2.
I got what is shown in the figure. That is, FIG. 1 is a perspective view showing a conventional wire bundle fixing method, and FIG. 2 is an enlarged sectional view of the wire bundle fixing portion of FIG. 1. In the figure,
1 is an electric wire, 2 is a wire bundle band, 3 is a wire bundle stand, and 4 is a metal fitting for attaching the wire bundle stand 3.

Here, the current wire bundle fixing method is to bundle the electric wires 1 with a wire bundle band 2 and fix them on a wire bundle stand 3. In Fig. 1, two types of physically separated wire bundles are used. Even if one wiring bundle is made up of Tren A and the other Tren B, there is no problem in normal times and separation can be maintained.

In conventional wire bundle fixing devices, wire bundle band 2 is generally
and the cable bundle stand 3 are both synthetic resin molded products,
In the event of a short-circuit accident, the wires are easily fused due to overheating, and it is difficult to maintain separation between the wires. Therefore, as a solution to this problem, the wire bundle band 2 and wire bundle stand 3 are
It is easy to think of a method of manufacturing the material from a material that does not melt, but this is too expensive compared to mass-produced synthetic resin molded products.

This invention has been made in order to eliminate the above-mentioned drawbacks of the conventional devices, and has as its object to provide an inexpensive wire bundle fixing device which can maintain the separation between the multiplexed wiring in a nuclear power plant even in the event of an accident.

An embodiment of this invention will be described below with reference to the drawings. In FIGS. 3 and 4, 5 is a heat-resistant protective material. First, this protective material 5 was used to wrap around the electric wire 1, and then the wire bundle band 2 was wrapped over it and fixed on the wire bundle table 3. It is something.

In this way, even if a short circuit occurs in the electric wire 1, causing an overcurrent to flow and overheating, the
The heat-resistant protective material 5 prevents both the wire bundle band 2 and the wire bundle stand 3 from being fused, so that the wire bundles are securely fixed not only in normal times but also in the event of an accident, and separability can be maintained.

Note that the heat-resistant protective material 5 is preferably made of silicone rubber, asbestos, or the like, and the same effect can be obtained even if it is made of metal.

As described above, according to this invention, it is possible to provide a bundled wire fixing device at a low cost that can maintain the separation between multiplexed wires required in nuclear power plants etc. even in the event of an accident, and it is also possible to provide If you use silicone rubber etc. for the wire bundle band 2, the wire 1
This has the effect of preventing people from getting hurt.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a conventional wire bundle fixing device, FIG. 2 is an enlarged sectional view of the wire bundle fixing part in FIG. 1,
Figure 3 shows one embodiment of this invention.
FIG. 4 is an enlarged sectional view corresponding to the figure, and FIG. 4 is a perspective view thereof. In the figure, 1 is an electric wire, 2 is a wire bundle band, 3 is a wire bundle stand, 4 is a mounting bracket, and 5 is a heat-resistant protective material.
Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims for Utility Model Registration] (1) An electric wire in which electric wires are bundled and fixed using a wire bundle band, characterized in that a heat-resistant protective material is inserted between the wire bundle band and the electric wire. bundled wire fixing device. (2) The wire bundle fixing device according to claim 1, in which silicone rubber is used as the heat-resistant protective material. (3) The wire bundle fixing device according to claim 1, in which asbestos is used as the heat-resistant protective material.