JPS62100118A - Fire preventive sealing of cable penetration - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excellent fireproof sealing method for a through-hole portion formed in a thick wall or floor and through which grouped cables (electrical wires) are inserted.

Conventionally, a method for fire-proofing sealing of through-holes installed in thick walls or floors through which cables are inserted is to fill the void around the cable in one through-hole with a noncombustible material such as mineral fiber. This has been done by covering both sides of the timber with fireproof boards such as calcium silicate boards, and filling the spaces between the fireproof boards and cables, walls, and floors with heat-resistant caulking material such as fireproof putty.

However, when cables are routed in a crowded manner, minute gaps are formed between the cables and the airtight seal becomes insufficient, which prevents harmful gases and smoke from penetrating due to the difference in indoor pressure in the event of a fire. I can't.

Conventionally, when passing grouped cables through a through hole, a method has been proposed that fills the gaps between the cables with a nonflammable gap filler, but this method is only effective for filling the gaps between the cables, and It is not involved in filling the gap with the noncombustible material that is filled around this, and the area around the group of cables that are grouped as described above has complicated unevenness, so the seal here is not involved. was likely to be inadequate.

Furthermore, such gap filling increases the number of work steps and time, and is also economically disadvantageous.

The present invention has been made in view of the above-mentioned prior art, and
The purpose of the present invention is to provide an improved construction method capable of reliably performing fireproof sealing of a through-hole portion through which a plurality of cables are grouped and passed through with less man-hours and in a short time.

In other words, the fireproof sealing method of the present invention involves impregnating a highly flame-retardant two-component room-temperature curing sealing material between a plurality of cables passed through a through-hole provided in a wall or floor. In addition to filling with noncombustible material, on both sides of this noncombustible material,
A fireproof plate formed to correspond to the shape of the through hole through which the cable has passed is arranged, and the fireproof plates on both sides are tightened together before the highly flame-retardant two-component cold-curing sealant hardens. By compressing the noncombustible material between the cables, a highly flame-retardant two-component cold-curing sealing material impregnated with the noncombustible material exudes and is press-fitted into the gap between the cables.

The following description will be made with reference to the accompanying drawings.

Figure 1 shows an example of a fire prevention seal that is inserted into the floor penetration part of the cable. 1 is a thick floor, 2 is a group of multiple cables inserted through the through hole 9 formed in the floor This is a group of standardized cables. Reference numeral 4 denotes a noncombustible material such as mineral fiber filled in the through hole 9 so as to cover the cable group 2, and is impregnated with a highly flame-retardant two-component cold-setting sealing material. Above and below the noncombustible material 4, fireproof plates 3.3 made of calcium silicate plates or the like are arranged. This fireproof plate 3.3 is formed in a shape that corresponds to and closes the through hole 9 through which the cable group 2 is passed.

A bolt 5 for tightening is passed through the fireproof plate 3.3.

The impregnated highly flame-retardant two-component room-temperature curing sealing material hardens after a certain period of time, so after filling the noncombustible material 4 impregnated with the sealing material, fireproof plates 3.3 are set from above and below. The bolts 5 are inserted between these fireproof plates 3 and 3 and are ready for tightening. At this time, it is advisable to attach a stopper 6 for receiving the lower fireproof plate 3 so that the fireproof plate 3 does not slip down.

In the above preparation stage, if necessary, a highly flame-retardant two-component cold-curing sealant is poured into the seal portion of cable group 2, and then a highly flame-retardant two-component cold-curing sealant is poured around the outer periphery of cable group 2. It is also possible to fill the outer periphery of the sealing material pouring portion of the cable group 2 with a noncombustible material 4 sufficiently impregnated with the above material, sandwich it between fireproof plates 3.3 from above and below, and set the cable group 2 through the bolts 5.

It is difficult for the sealing material to enter the gaps between the cables of the cable group 2 just by pouring it. In the present invention, before the highly flame-retardant two-component room-temperature curing sealant is cured, the fireproof plate 3.3 is
By tightening the fireproof plate 3.3 with the bolt 5 passed between them, the noncombustible material 4 is compressed, and the high-temperature two-component cold-curing sealing material impregnated in the noncombustible material 4 is exuded. The periphery of the cable group 2 is airtightly covered, and the gap between the cables is press-fitted, and in this state, the highly flame-retardant two-component room-temperature curing sealing material is cured, thereby forming a prescribed fireproof seal. be.

In addition, between the fireproof plate 3 and the cable group 2, and between the fireproof plate 3 and the floor 1
A heat-resistant caulking material 7 is filled in each gap between the two to fill the gap and improve the appearance. moreover,
In the case of large cables with a cross-sectional area of more than 60Hn2, apply fire spread prevention paint 8 to the cable parts extending from both sides of the fire seal to prevent the generation of smoke and harmful gases due to heat conduction on the side affected by the fire. By doing so, more complete fire prevention can be achieved.

In this way, the fireproof sealing method for the cable penetration part of this embodiment eliminates the need to individually fill the gap between the cables in the cable group with a filling material to make the cables airtight between each other, as in the case of the conventional method. The gaps in the cable group are filled by tightening the bolts, reducing the number of work steps and time.

In addition, the highly flame-retardant two-component cold-curing sealing material impregnated with the noncombustible material filled in the through holes oozes out to fill the gaps in the cable group, and in addition, to create an airtight seal between the noncombustible material and the cable group. Since it is possible to form a fireproof seal reliably.

Therefore, it is possible to reliably seal out smoke and harmful gases generated in the event of a fire, contaminated air from atomic couplants, harmful gases from chemical factories, and the like. It can also be used to prevent oil leaks, water leaks, etc.

Fig. 2 shows an example of a fire prevention seal in a wall penetration part, and the only difference from the above embodiment is that the cable group 2 runs horizontally through the wall 10, and the same reference numerals as in Fig. 1 are the same. This shows the parts that have been used. In this embodiment, there is no need for a stopper for preventing the fireproof plate 3 from falling as in the above embodiment. The effects of this embodiment are similar to those of the above embodiment.

As explained above, the fireproof sealing method for cable penetration parts of the present invention can perform gap filling for a plurality of grouped cables and airtight integration of cables and noncombustible material in a very simple and short time. This has the effect of forming a reliable fireproof seal.

[Brief explanation of drawings]

FIGS. 1 and 2 are cross-sectional explanatory views showing two embodiments of the fireproof sealing method for cable penetration parts according to the present invention, respectively. 1: Floor, 2: Cable, 3: Fireproof plate, 4: Noncombustible material impregnated with highly flame-retardant two-component cold-curing sealant, 5: Bolt, 9: Through hole, 10: Wall.

Claims (1)

[Claims] (1) A noncombustible material impregnated with a highly flame-retardant two-component cold-curing sealant is filled between the through-hole provided in the wall or floor and the multiple cables passed through the through-hole. , fireproof plates formed to correspond to the shape of the through hole through which the cable is passed are placed on both sides of this noncombustible material, and the fireproof plates are placed on both sides before the highly flame retardant two-component curing sealant is cured. By tightening the fireproof plates and compressing the noncombustible material between them, a highly flame-retardant two-component curing sealing material impregnated with the noncombustible material is press-fitted into the gap between the cables. A fireproof sealing method for cable penetrations.