JP2017121369A - Flame proof sheet and fire spread prevention method using the same - Google Patents

Abstract

The present invention provides a flameproof sheet and a method for preventing the spread of fire, which can more reliably prevent the spread of the object to be protected while preventing water damage to the object to be protected such as a cultural property.
A projection 2b is provided on the surface of the flameproof sheet 2 so that a gap 2c is formed between a plurality of projections 2b, 2b. When the gap 2c spreads a fireproof gel on the flameproof sheet 2, In addition, it is assumed that the fireproof gel can be held in the gap 2c, the object to be protected 1 is covered with the flameproof sheet 2, the fireproof gel in the sol state is sprayed on the surface of the flameproof sheet 1, and The fireproof gel is held in a gel state in the gap 2c of the flameproof sheet 2, and the fireproof gel layer 7 is formed on the surface of the flameproof sheet 2.
[Selection] Figure 5

Description

  The present invention relates to a flameproof sheet and a method for preventing fire spread using the flameproof sheet.

  In the past, when a fire broke out around a facility that stored the objects that should be protected from the spread of fire (such as fireworks), the objects to be protected were taken out of the facilities one by one to ensure safety. It was necessary to evacuate to a new place. When there are a large number of objects to be protected, it takes time to evacuate the objects to be protected, and there is a risk that damage will be increased while the objects are being carried out.

  In this case, it may be possible to prevent the spread of fire by sprinkling water with sprinkler equipment, etc., but when the object to be protected is a cultural property, etc. The cultural property may be damaged or deteriorated, resulting in water damage.

  Therefore, a sheet having a water-absorbing polymer layer is placed on an object to be protected, the water-absorbing polymer absorbs water to form a water-containing layer, and the water-containing layer contains a water-containing layer. Flameproof sheets that prevent the spread of fire are known (see Patent Documents 1 and 2).

Japanese Patent Application No. 2000-70395 Japanese Patent Application No. 2000-31007

Conventional flameproof sheets have the following problems.
(1) Since a certain amount of time is required for the water-absorbing polymer to absorb the amount of water necessary to sufficiently prevent the spread of the object to be protected, it is not possible to prevent the object of protection from spreading when the fire spreads quickly. there is a possibility.

  (2) As a real problem, when there are many objects to be protected or when they are stored in multiple locations, it is considered that a certain amount of water is sprayed to cause the water-absorbing polymer to absorb water. However, at this time, water that has not been absorbed by the water-absorbing polymer layer flows down to the floor of the facility, and water enters the sheet through the gap between the floor and the sheet, and the object to be protected may be damaged. There is sex.

  Then, an object of this invention is to provide the flame-proof sheet | seat and the method of preventing a fire spread which can prevent the fire spread of the said protection target object more reliably, preventing the water loss of protection objects, such as cultural assets.

  The present invention relates to a flameproof sheet used by spraying a fireproof gel having thixotropy on the surface, and the projection is provided on the surface so that a gap is formed between a plurality of projections. The gap is a flameproof sheet that is capable of holding the fireproof gel in the gap when the fireproof gel is sprayed on the flameproof sheet.

  The present invention also includes a step of covering an object to be protected with the flameproof sheet, a step of spraying a fireproof gel having thixotropy toward the surface of the flameproof sheet in a sol state, and the fireproof gel. Holding the gel sheet in the gap of the flame sheet and forming a fire-proof gel layer on the surface of the flame-proof sheet.

  The flameproof sheet of the present invention can be arranged such that the projections are arranged so that the projections and the gaps are staggered. In the flameproof sheet of the present invention, a receiving part can be formed at the tip of the protrusion.

  The fire spread prevention method of the present invention may include a step of causing the fireproof gel to contain sodium silicate and forming a fireproof layer on the surface of the flameproof sheet. In addition, the fire spread prevention method of the present invention can include a step of forming an air layer between the fireproof layer and the fireproof gel layer.

  In the present invention, the “projection” includes a projecting convex portion that remains as a result of removal of the periphery by, for example, cutting, and the “gap” forms the convex portion. In this case, for example, a concave portion which is a portion removed by cutting is also included.

  In the present invention, since the projections are provided on the surface of the flameproof sheet and the fireproof gel can be held in the gap between the projections, the fireproof gel having thixotropic properties when the fire occurs around the object to be protected. When sprayed toward the flame sheet, the fire-proof gel is held on the surface of the flame-proof sheet in a highly viscous gel state, and a fire-proof gel layer can be formed on the surface.

  Therefore, after covering an object to be protected, such as a cultural property, with a flameproof sheet, the surface of the flameproof sheet is covered with a fireproof gel by spraying a sol-state fireproof gel, and a gel-type fireproof gel layer is formed on the surface. It is possible to form. Therefore, it is possible to protect the object to be protected from fire spread more quickly.

  In addition, even if the fireproof gel flows down to the floor surface, the fireproof gel is in a gel state having a high viscosity due to its thixotropy, and the fluidity is low. It is possible to prevent surrounding objects from being damaged by water.

It is the schematic which shows the fire spread prevention method in 1st and 2nd embodiment of this invention, and is a figure which shows a mode that a fireproof gel is sprayed toward a flameproof sheet. It is the schematic which shows the fire-spreading prevention method in 1st and 2nd embodiment of this invention, is a figure which shows a mode that a fireproof gel is sprayed toward a flameproof sheet, and is a figure which shows an aspect different from FIG. . It is a surface view which shows the flameproof sheet in 1st and 2nd embodiment of this invention. It is a surface view which shows the flameproof sheet in 1st and 2nd embodiment of this invention, and is a figure which shows the aspect different from FIG. It is an expanded sectional view showing the flameproof sheet in a 1st embodiment of the present invention. It is an expanded sectional view which shows the flameproof sheet in 2nd Embodiment of this invention.

  A first embodiment of the present invention will be described with reference to FIGS. First, the method for preventing the spread of fire according to the present embodiment will be described. The type of protection object 1 to be protected from the spread of fire is not particularly limited by the present method of preventing the spread of fire. Examples include cultural assets and electrical / electronic equipment.

  (1) The protection object 1 is covered with the flameproof sheet 2 when a fire has occurred in advance or around a section that is displayed, installed, or stored. At this time, it is preferable to cover the entire protection object 1 with the flameproof sheet 2 as much as possible.

  (2) And connected to a supply source of a fireproof gel 6 such as a sprinkler 4 (see FIG. 1) and a nozzle 5 (see FIG. 2) provided on the ceiling 3 of the section, for example, a tank 11 or the like. The fireproof gel 6 is sprayed toward the flameproof sheet 2 by the spraying means.

  The fireproof gel 6 contains thixotropic properties, including thixotropic agents such as water and colloidal hydrous silicates (minerals such as smectite, bentonite and montmorillonite, or similar inorganic polymer compounds). For this reason, since the fireproof gel 6 is in a low-viscosity sol state due to the stress at the time of spraying, it can be quickly sprayed toward the surface of the flameproof sheet 2. . The fireproof gel 6 can contain sodium silicate as appropriate in addition to the thixotropic agent.

  (3) The sprayed fireproof gel 6 gradually becomes a highly viscous gel state on the surface of the fireproof sheet 2 due to its thixotropy, and forms a fireproof gel layer 7 so as to cover substantially the entire surface (see FIG. 5). reference). The fireproof gel layer 7 prevents the heat of the fire from being conducted into the flameproof sheet 2 due to evaporation of moisture contained in the fireproof gel 6 and protects the object 1 to be protected from fire spread.

  In parallel with the step (3), even if a part of the fireproof gel 7 falls on the floor surface 9 in the step (2), the fireproof gel 7 that falls on the floor surface 9 is also highly viscous. Since it is in a gel state, the fireproof gel is prevented from entering the flameproof sheet 2.

  (4) When the fireproof gel 6 contains sodium silicate, the moisture contained in the fireproof gel 6 evaporates due to the heat of the fire and the sodium silicate foams and fireproofs the surface of the flameproof sheet 2 Layer 8 is formed (see FIG. 5). By forming the refractory layer 8, the protection object 1 can be protected from fire spread even after moisture has evaporated.

  Next, a specific configuration of the flameproof sheet 2 will be described. The flameproof sheet 2 preferably includes a sheet main body 2a formed of a fire-resistant, non-flammable or flame-retardant material, and a plurality of protrusions 2b formed over the entire surface of the sheet main body 2a. .

  The protrusion 2b is disposed on the surface of the flameproof sheet 2 so that a gap 2c is formed between the protrusions 2b and 2b, and the fireproof gel 6 is fastened on the surface of the flameproof sheet 2 in a gel state, and the fireproof gel layer 7 is provided. The interval, density, and the like of the protrusions 2b are appropriately selected as long as the fireproof gel 6 can enter the gap 2c and the fireproof gel 6 can be held in the gap 2b.

  The arrangement of the protrusions 2b can be selected as appropriate, but it is preferable that the protrusions 2b and the gaps 2c are arranged on the surface of the flameproof sheet 2 so as to be alternated. By doing in this way, in the process (2), it is possible to restrict the fire gel 6 from flowing down (dripping) in the gravity direction G (the floor surface 9 direction) by the protrusion 2b and orthogonal to the gravity direction G. The movement in the horizontal direction can be restricted by the protrusion 2b, and the fireproof gel 6 can be held in the gap 2c more reliably.

  Moreover, since the shape of the protection target object 1 is various, in order to give the flameproof sheet 2 versatility, the protrusions 2b can be arranged on the lattice as shown in FIG. Furthermore, for example, in the case where the flameproof sheet 2 can be covered with the protection target 1 so that the center portion 2f is at the apex, the protrusions 2b are arranged concentrically as shown in FIG. You can also.

  The shape and length of the protrusion 2b is appropriately determined as long as the fireproof gel 6 can be held on the surface of the flameproof sheet 2 so that the fireproof gel layer 7 having a thickness necessary for preventing the fire of the protection target 1 can be secured. Although it is possible to select, it is preferable that at least the facing surface 2d facing the gravity direction G when the flameproof sheet 2 covers the protection target object 1 is substantially flat.

  A second embodiment of the present invention will be described with reference to FIGS. 1 to 4 and FIG. The difference from the first embodiment is that the length of the protrusion 2b of the flameproof sheet 2 is formed to be longer than the required thickness of the fireproof gel layer 7, and is formed in a substantially bowl shape, and is formed at the tip of the protrusion 2b. That is, the receiving part 2e is formed. Since others are the same as those in the first embodiment, description thereof will be omitted.

  In the present embodiment, the protrusion 2b is formed in a substantially bowl shape, and a receiving portion 2e is formed at the tip thereof. By doing in this way, in this embodiment, it is possible to prevent the fireproof gel 6 from overflowing outside the protrusion 2b of the flameproof sheet 2 during the step (2).

  Moreover, in this embodiment, the protrusion 2b is formed so that the length may become longer than the thickness of the fireproof gel layer 7 required. By doing so, in the method of preventing fire spread according to the present embodiment, the fire-proof gel layer 7 having a necessary thickness is formed even when a margin is provided on the tip side of the protrusion 2b in the step (2). It becomes possible.

  In the step (4), the refractory layer 8 is formed from the portion where the moisture of the fireproof gel layer 7 is evaporated by the heat of the fire, particularly from the surface portion of the fireproof gel layer 7. The foaming of sodium acid starts and is gradually formed. At this time, in this embodiment, the fireproof gel layer 7 is formed with a margin on the front end side of the protrusion 2b. 7 moves to the tip side of the protrusion 2b so that the refractory layer 8 formed on the surface portion or the like is lifted.

  As a result, an air layer 10 is formed between the fireproof gel layer 7 and the fireproof layer 8. That is, the method for preventing the spread of fire according to the present embodiment can further include a step of forming the air layer 10. This air layer 10 becomes a heat insulating layer, and heat from the fire is conducted in the flameproof sheet 2. It becomes possible to prevent.

  As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to the said embodiment, In the range which does not change the summary of invention, it can change suitably. For example, the sheet body 2a of the flameproof sheet 2 is required to be flexible, whereas the protrusion 2b is required to support the fireproof gel 6, so that rigidity rather than flexibility may be required. .

  In such a case, the sheet body 2a and the protrusion 2b of the flameproof sheet 2 are made of different materials, for example, the sheet body 2a is made of a soft flexible resin, and the protrusion 2b is made of a resin having a lower flexibility than the resin. By molding with a hard resin, composite material, metal, or the like, the flexibility of the sheet main body 1 and the protrusion 2b can be adjusted appropriately.

  Moreover, when covering the protection target object 1 with the flameproof sheet 2, you may cover every protection target object 1 like the said embodiment, but you may cover a plurality or all the protection target objects 1 collectively. The fire spreading to the protection target 1 may be prevented by covering a section of the protection target 1 itself. And you may enable it to form the protrusion 2b also in the back surface of the flameproof sheet 2, and to use the flameproof sheet 2 reversibly. Furthermore, the sheet body 2a of the flameproof sheet 2 may have water absorption.

DESCRIPTION OF SYMBOLS 1 Protection target object 2 Flameproof sheet 2a Sheet main body 2b Protrusion 2c Gap 2d Opposing surface 2e Receiving part 2f Center part 3 Ceiling part 4 Sprinkler 5 Nozzle 6 Fireproofing gel 7 Fireproofing gel layer 8 Fireproofing layer 9 Floor surface 10 Air layer 11 Tank G Direction of gravity

Claims (4)

A fireproof sheet used by spreading a fireproof gel having thixotropy on the surface,
The protrusion is provided on the surface so that a gap is formed between the plurality of protrusions.
The flameproof sheet is characterized in that the fireproof gel can be held in the gap when the fireproof gel is sprayed on the flameproof sheet.   The flameproof sheet according to claim 1, wherein the protrusions are disposed so that the protrusions and the gaps are staggered.   The flameproof sheet according to claim 1, wherein the protrusion has a receiving portion formed at a tip portion thereof. Covering the object to be protected with the flameproof sheet according to any one of claims 1 to 3,
Spraying a fireproof gel having thixotropy toward the surface of the flameproof sheet in a sol state;
Holding the fireproof gel in the gap in the flameproof sheet in a gel state, and forming a fireproof gel layer on the surface of the flameproof sheet.

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