JPS5915215Y2 - Fireproof and heat-insulating sealing material for wire penetrations in switchboards and storage boxes of switchboards - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sealing material for use in electrical wire penetrations of power distribution boards and storage boxes of power distribution boards that require fireproof and heat insulation performance.

Conventionally, when wiring electric wires to devices that require fireproof and heat-insulating performance, such as switchboards and distribution boards, holes are made in the storage boxes of the devices and the wires are routed through them, and the penetrations are sealed. It was filled with putty such as asbestos or rock wool, or viscous material such as clay.

However, as such sealing materials dry, they shrink and crack, resulting in reduced sealing effectiveness, and in the event of a fire, flames and heat can enter the interior through the penetrations, making it difficult to protect the equipment stored inside. could not be said to be sufficient.

Furthermore, the process of filling the viscous material into the gap created after passing the wire through the wire is time-consuming, and has disadvantages such as difficulty in uniform application and poor aesthetics. .

In addition, recently the ``Standards for switchboards and distribution panels for emergency power receiving equipment that receive low-voltage power'' (Fire and Disaster Management Agency Notification No. 8, May 28, 1975) have been established, and the Now more stringent fire resistance and insulation performance is required than ever before.

The present invention does not use a viscous substance and fill it into the penetrating part as in the prior art, but uses a structure made to cover the penetrating part from the surface. Provides a fire-resistant sealing material for use in wire penetrations in switchboards and switchboard storage boxes that eliminates all the drawbacks of the above-mentioned new standards and also has excellent fire resistance, heat insulation, construction method, and aesthetics. The purpose of this is to have a hollow container made mainly of inorganic fibers with a flange protruding from the outer periphery of one open end, and a notch for guiding wires in the center of the other open end. It consists of a container filled with inorganic fibers.

The hollow container has appropriate flexibility, elasticity, and fire resistance, and is made of loose, nonwoven, or woven asbestos,
Inorganic fibers such as rock wool or ceramic fibers are molded into a desired shape using a small amount of an inorganic or organic binder (preferably rubber or plastic).

The inorganic fibers used to fill the hollow container are asbestos, rock wool, slamic fiber, etc., and may be simply loose or felt-like with a through hole smaller than the diameter of the wire. good.

The fire-resistant and heat-insulating sealing material according to the present invention will be described in detail with reference to drawings showing examples thereof. FIG. 1 is a perspective view of the fire-resistant sealing material according to the present invention, and FIG. 2 is a line AA' in FIG. 1. This is a line cross-sectional view, in which asbestos 3 is filled in a hollow cup-shaped container 2 made of asbestos cloth bonded with flame-retardant rubber glue, and a vinyl film 5 is attached to the bottom of the collar 4 in the open part with adhesive. It is glued.

FIG. 3 is a perspective view showing an example of the use of the fireproof and heat insulating sealing material shown in FIGS. 1 and 2 in the distribution board 6. It is integrally bonded to the calcium silicate plate 7 while covering the through hole drilled in the steel plate equipment storage box 8, and the electric wire 9 is attached to a cup-shaped fireproof/insulating seal filled with asbestos 3 inside. It passes through a notch 21 provided in the center of the material 1 and is connected to equipment in the distribution board.

However, even if a fire were to occur, the ingress of flame and conduction of heat through the penetrating portion would be blocked by the interaction between the hollow cup-shaped container 2 made of rubber-impregnated asbestos cloth and the asbestos fibers 3 filled inside. , the equipment stored inside is protected.

In addition, the fireproof and heat-insulating sealing material 1 is attached to the electric wire 9 by simply using the electric wire to break through the vinyl film glued to the open part during wiring, and by cutting through the notch 21 made in the center of the flexible hollow container 2 with a flange. Since it is only necessary to pass the material through, the construction is very simple, and it is possible to achieve uniform construction and provide an aesthetically pleasing product.

In the present invention, the method for attaching the fireproof/insulating sealing material to the switchboard and the storage box of the switchboard is not limited to adhesive, but can also be done by attaching the flange 4 with screws depending on the mating material. Furthermore, the shape of the fireproof/insulating sealing material is not limited to that shown in the examples, but can be suitably given any shape within the scope of the configuration of the present invention. .

The fireproof and heat-insulating sealing material according to the present invention does not fill the gap between the through hole and the electric wire in the penetration part with a viscous sealing material as in the past. It does not shrink or crack even in the event of a fire, and completely prevents flames from entering through the through holes of electric wires. It is very effective as a sealing material for the penetration part of the storage box, and the installation process is as simple as pulling in the wires and pasting it on the storage box, so it requires less work than conventional methods. is very simple and has great practical value.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the fireproof/insulating seal material according to the present invention, Fig. 2 is a sectional view taken along the line A-A' in Fig. 1, and Fig. 3 is the fireproof/insulating seal shown in Figs. 1 and 2. FIG. 2 is a perspective view showing an example of how the material is used in a distribution board. 1... Fireproof/insulating sealing material, 2... Hollow container with flange, 21... Notch, 3...
... Asbestos, 4 ... Tsuba, 5 ... Film, 6 ... Distribution board, 7 ... Calcium silicate fireproof plate, 8 ... ...Equipment storage box, 9...
Electrical wire.

Claims (1)

[Scope of utility model registration request] In the sealing material for the wire penetration part in the distribution board and the storage box of the distribution board, a hollow container made mainly of inorganic fiber has a collar protruding from the outer periphery of one open end, and a cut for guiding the wire in the center of the other unreleased part. 1. A fireproof and heat-insulating sealing material for electric wire penetrations in a switchboard and a storage box for a switchboard, characterized by having a hollow container filled with inorganic fiber.