JP4224559B2 - Construction method of heat-insulated metal pipe for penetration part of fire prevention section and structure of penetration part of fire prevention section - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a construction method for applying a fire-proof measure to a partition portion that becomes a fire-proof section of a building, that is, a heat-insulated metal pipe that is installed through a through-hole provided in a wall or a floor, and through a fire-block section Regarding the part structure.
[0002]
[Prior art]
Conventionally, this kind of piping of flammable material that penetrates the floor or wall of the fire compartment penetrating part, that is, heat insulation coated metal pipe coated with resin pipe such as polyethylene pipe or vinyl chloride pipe or flammable material, or electric or Various construction methods for applying a fire prevention measure to wiring such as a communication cable and a fire prevention section through structure are disclosed.
The heat-insulated metal tube is obtained by coating a metal tube such as a steel tube, a copper tube, or a stainless tube with a heat insulating material such as expandable polyethylene.
[0003]
Conventionally, regarding fire prevention measures for penetrations in heat-insulated coated metal pipes, “Ministry of Land, Infrastructure, Transport and Tourism, Minister's Secretariat, Maintenance Department Supervision Department Mechanical Equipment Construction Common Specification Chapter 2 Plumbing Section 8 Treatment of penetrations” Construction supervised by the Ministry of Land, Infrastructure, Transport and Tourism, Ministry of Land, Infrastructure, Transport and Tourism, Department of Repair, Equipment Section, Construction Standards for Construction Equipment 1 Construction Procedure for Piping Fire Prevention Zones (a) Piping that requires heat insulation in penetrations And it was considered as a general construction.
As shown in FIG. 6, the construction state is such that the through-hole B and the heat insulating material 11 of the pipe in a range corresponding to both sides of the through-hole B are cut out to expose the inner metal tube, The rock wool heat insulating material E is mounted on the surface, and the gap with the through hole is filled with the rock wool heat insulating material or mortar C.
Japanese Patent Laid-Open No. 2000-240854 discloses a fire prevention measure for a pipe using a combustible material including a heat-insulated coated metal pipe. A technique for winding a thermally expandable fireproof sheet around a pipe and burying a gap between the through hole with mortar is known. It was disclosed.
[0004]
[Problems to be solved by the invention]
However, the conventional method has the following problems.
In the construction method using the rock wool heat insulating material, which is a standard construction from the past, it is necessary to cut the heat insulating material to the range of about 50 mm on each side of the through hole. Work was not possible, and the work efficiency was poor because each side moved to work on either side of the partition or an operator was required on each side of the partition .
Furthermore, since the work of attaching the rock wool heat insulating material to be attached to the cut portion is work from both sides of the partition part, the work efficiency is poor as described above.
[0005]
In addition, there is a method using a thermal expansion refractory putty material as disclosed in JP-A-2000-240854, but in order to enhance the fire prevention performance of a building in recent years, not only the prevention of fire spread but also the ability to completely block smoke. There is a strong demand for it, and further improvements in performance are desired.
[0006]
In other words, in the case of resin pipes and cables, a fire-expandable fireproof sheet as disclosed in JP 2000-240854 is wrapped around the pipe, placed in the through hole, and the gap with the through hole is filled with mortar. When a fire occurs, the heat-expandable refractory sheet expands due to heating from the heating side of the fire, and the cavity of the material portion that is burned down by heating, for example, if the resin tube is crushed, the cavity is It was completely blocked, and the fire spread to the non-heated side and smoke could be completely blocked.
However, in the case of a heat-insulated metal tube, the heat-expandable refractory sheet in the penetrating part expands due to heating from the heating side of the fire, and crushes the heat-insulating material in the material part that is destroyed by heating, thereby completely closing the cavity. Even then, the metal tube remaining on the heating side (the heat insulating material has been burned down) is continuously heated, and the heat is transmitted through the metal tube to pass through the thermally expandable refractory sheet to insulate the non-heated side. The inside of the material is heated, and the heat insulation melts and shrinks due to the heating, causing cracks in the parts that cannot withstand the expansion, and there is a possibility that smoke may come out from the cracks. there were.
[0007]
The present invention has been made in view of the above-described conventional problems. The purpose of the present invention is to facilitate construction from one side of a partition portion which becomes a fire prevention compartment penetration portion, and to transmit from the heating side to the non-heating side through a through hole when a fire occurs. It is an object of the present invention to provide a construction method and a fire compartment penetrating portion structure that reliably stops the spread of fire and also completely blocks smoke.
[0008]
[Means for Solving the Problems]
As its means, the construction method of the heat insulation coated metal pipe of the fireproof compartment penetration part of the invention of claim 1 is the construction side of the insulation material of the heat insulation coated metal pipe inserted into the through hole of the partition part which becomes the fireproof division of the building. Cut away from the surface of the through-hole and attach a heat and heat insulating material to the cut-out part so that the tip of the thermally expandable refractory sheet protrudes outward from the hole surface on the construction side of the through-hole. After winding and covering the coating sheet covering the tip end surface, each step of burying the gap with the through hole with mortar is performed only on one side of the partitioning portion .
[0009]
The fireproof compartment penetration structure of the invention of claim 2 is constructed by the construction method according to claim 1.
[0010]
[Action]
Since the construction method of the heat insulation coating | coated metal pipe of the fire prevention division penetration part of this invention can be constructed from the one side of a partition part, workability | operativity is good.
When a fire occurs, the heat-expandable refractory sheet in the penetrating part is expanded by heating from the fire source side, and the cavity of the heat insulating material to be burned out can be completely closed, so that it is possible to prevent the spread of fire and to prevent smoke.
A part of the heat insulating material on one side of the partition part is cut out and a heat-resistant heat insulating material is attached, so that when a fire occurs on the construction side, the position where the metal tube is heated can be separated from the partition part. Therefore, the heat transmitted through the metal tube can be stopped in the partition part.
When a fire occurs on the back side of the construction side, it can be prevented because it is mounted at a position of a heat insulating material that may be melted or cracked by the heat transmitted through the metal tube.
Furthermore, by using a cover sheet, when a fire occurs on the back side of the construction side, there is a possibility that a gap will be generated between the thermally expandable refractory sheet and the metal tube, and smoke passing through the gap Is not discharged from the tip which is in an open state, so that a further smoke shielding effect can be obtained.
Moreover, the fire prevention compartment penetration part structure of this invention is formed by the said construction method, Comprising: The fire prevention structure of the outstanding fire spread prevention and smoke insulation effect can be obtained.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Below, the construction method of the heat insulation coating | coated metal pipe | tube of a fire prevention division penetration part and fire prevention division penetration part structure of this invention are demonstrated in detail.
1 is a perspective view showing a wall construction method, FIG. 2 is a perspective view showing a construction state after mortar filling, FIG. 3 is a sectional view of the main part, 10 is a heat-insulated coated metal tube, 20 Denotes a heat-resistant and heat-insulating material, 30 denotes a thermally expandable fireproof sheet, 40 denotes a covering sheet, A denotes a wall portion, B denotes a through hole, and C denotes mortar.
[0012]
After inserting the heat insulating coated metal tube 10 through the rectangular through hole B of the wall portion A (a), the heat insulating material 11 of the heat insulating coated metal tube 10 is cut from the hole surface on the construction side of the through hole B to the outside of about 100 mm. Cut it out with a tool. (B)
The heat-resistant and heat-insulating material 20 is attached to the cut portion (c). The heat-and-heat-insulating material 20 has a thickness equivalent to the thickness of the heat insulating material 11 as shown in FIG. A fixing cover 23 in which an adhesive material is laminated on an aluminum foil is bonded to the outer periphery thereof, and the fixing cover 22 has a length and an outer diameter of the heat and heat insulating material 20. It is formed larger than the circumference, and release papers 24 and 25 are adhered to the protruding portions. The slits 22 are opened and fitted into the exposed metal tube 12 by cutting out the heat insulating material 11, and the heat-resistant and warming material 20 The release paper 24 in the longitudinal direction is peeled off, the divided slits 22 are closed and bonded, fixed, and the release papers 25 and 25 on both sides in the circumferential direction of the heat and heat insulating material 20 are peeled off to insulate the heat insulating material 11 on both sides of the cut portion. , 11 and fixed integrally .
Next, a heat-expandable fireproof sheet 30 is wound on the heat and heat insulating material 20, and (d) the inside of the through-hole B so that the tip protrudes approximately 30 millimeters outward from the hole surface of the through-hole B on the construction side. Move to. (E)
The material of the heat-expandable sheet 30 is mainly composed of polybutadiene and magnesium hydroxide, added with a graphite-based inorganic expandable material, glass fiber as a reinforcing material, and formed into a sheet shape having a thickness of 7 mm. ing.
As with the fixing cover 22, a covering sheet 40 made of a material in which an adhesive material is laminated on an aluminum foil is laid over the heat-resistant and heat-insulating material 20 from the heat-expandable fireproof sheet 30 so as to cover the tip of the heat-expandable fireproof sheet 30. And stick firmly. (F)
At that time, a part of the covering sheet 40 is preferably 10 millimeters or more, but in a state of entering the through hole B, it is wound and fixed so as to be embedded by filling the mortar C in the next operation.
The same operation is repeated, and after a predetermined number of heat-insulated metal tubes are arranged in the through portion B, the gap with the through hole B is buried with mortar C as shown in FIG.
[0013]
The width of excision of the heat insulating material 11 is approximately 100 millimeters, but the length is not particularly limited and can be appropriately changed depending on the thickness of the wall and the thermal conductivity of the metal tube.
That is, when the heating time of the metal tube on the heating side is constant, the position where the heat travels through the metal tube from the heating side and reaches the non-heating side varies depending on the thermal conductivity of the metal tube, and the thickness of the wall This is because the distance from the wall side on the non-heating side to the arrival point is different due to the difference in length.
[0014]
Examples of the heat and heat insulating material 20 include ceramic wool, glass wool, silica / alumina fiber, silica fiber, alumina fiber and the like in addition to rock wool.
As shown in FIG. 5, the cylindrical shape may be divided into two in the length direction, or a flat sheet (not shown) may be wound along the outer shape of the metal tube during work.
Moreover, although the thickness is formed in the same thickness as the heat insulating material of a heat insulation coating metal pipe, as an example, if it is a covering copper pipe used as an air-conditioning refrigerant pipe, generally the thickness is 10 millimeters. The thickness of the heat and heat insulating material 20 can also be 10 millimeters.
[0015]
For the fixing cover, a material in which an adhesive material is laminated on an aluminum foil is used in the embodiment, but in addition to this, a metal foil having heat resistance, for example, iron, stainless steel, tinplate, etc. is preferable, but a resin, for example, PVC, polyethylene, polypropylene and the like may be used.
Moreover, it may be a separate body from the heat and heat insulating material 20, and may be wound around necessary portions such as a joint portion with a heat insulating material and a closed portion of a split slit as a scroll like vinyl tape.
[0016]
Regarding the material of the thermally expandable fireproof sheet 30, aluminum hydroxide, hydrated magnesium, bentonite, hydrated silicic acid and the like can be used as a constituent material in addition to inorganic magnesium hydroxide.
In addition to organic polybutadiene, for example, rubber materials such as natural rubber, EPDM, chloroprene rubber, isobrene rubber, butadiene rubber, acrylic rubber, ethylene-propylene rubber, and fluorine rubber, or styrene thermoplastic elastomer and olefin thermoplastic. Examples thereof include thermoplastic elastomers composed of elastomers, vinyl chloride thermoplastic elastomers, and the like.
Examples of the expanding material include borax, expanded graphite, granite, pearlite, or a mixture thereof.
In short, any material may be used as long as it can expand by heating and crush the heat insulating material of the heat-insulated metal tube or completely block the burned-out portion.
The size and thickness of the sheet-like form is not particularly limited, but it is slightly longer than the circumference of the tube to be wound, and the width is long enough to superpose the start and end when winding on the tube. Preferably, the length can be changed by wall thickness and the like, and the thickness can be changed by thermal expansion performance.
[0017]
About the said cover sheet 40, although the material which laminated | stacked the adhesive material on the aluminum foil is used in embodiment, metal foil which has heat resistance, for example, iron, stainless steel, tinplate, heat resistant resin, etc. are mentioned.
Further, in order to prevent breakage due to bending or winding at the time of mounting, a resin, a film such as glass fiber, a nonwoven fabric, a mesh, or the like can be laminated between the adhesive material and the aluminum foil to form a high strength.
[0018]
【The invention's effect】
As described above in detail, according to the construction method of the heat insulation coated metal tube of the fireproof compartment penetration part and the fireproof compartment penetration part structure of the present invention, workability is good because it can be constructed from one side of the partition part, and the work efficiency is improved. Can be planned.
The event of a fire, expands thermally expandable fireproof sheets in the through portion by heat from the fire source side, with a cavity burned to heat insulating material can be completely closed, one side of the insulation partition portion If the fire is generated on the construction side, the position where the metal tube is heated can be separated from the partition, so that the heat transmitted through the metal tube can be separated. It can be stopped in the department.
When a fire occurs on the back side of the construction side, it can be prevented because it is mounted at a position of a heat insulating material that may be melted or cracked by heat transmitted through the metal pipe.
Therefore, it is possible to reliably prevent the fire from spreading and to obtain an excellent smoke shielding effect.
Furthermore, by using a cover sheet, when a fire occurs on the back side of the construction side, there is a possibility that a gap will be generated between the thermally expandable refractory sheet and the metal tube, and smoke passing through the gap Is not discharged from the tip which is in an open state, so that a further smoke shielding effect can be obtained.
Moreover, the fire prevention compartment penetration structure of the present invention is formed by the above construction method, and a fire prevention structure having excellent fire spread prevention and smoke prevention effects can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a wall construction method according to the present invention. FIG. 2 is a perspective view showing a wall construction state according to the invention. FIG. 3 is a cross-sectional view of a main part showing a wall construction state according to the invention. FIG. 4 is a perspective view showing a heat insulating heat insulating material in the present invention. FIG. 5 is a perspective view showing another heat insulating heat insulating material in the present invention. FIG.
DESCRIPTION OF SYMBOLS 10 Heat insulation coating metal pipe 20 Heat insulation heat insulating material 30 Thermal expansion fireproof sheet 40 Coating sheet

Claims (2)

The heat insulating material of the heat-insulated coated metal tube that passes through the through hole of the partition that becomes the fire prevention compartment of the building is cut out from the through hole surface on the construction side, and a heat and heat insulating material is attached to the cut part, Wrap so that the tip of the inflatable refractory sheet protrudes outward from the hole surface on the construction side of the through hole, and further wind a covering sheet covering the tip surface, and then set the gap between the through hole and the mortar. A method for constructing a heat-insulated metal tube for a fire-blocking section through-portion, characterized in that each step of burying in is performed only on one side of the partition section .   It is constructed by the construction method according to claim 1, and has a fireproof compartment penetration structure.

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