JP2013044408A - Fire resistant sheet for inflammable piping - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire resistant sheet for inflammable piping which can be easily mounted to inflammable piping which has been laid and installed in a through hole of a fire fighting zone, can extend from a portion within the through hole to the outside and can strongly and surely cut off the piping in case of fire.SOLUTION: The fire resistant sheet for inflammable piping is wound around inflammable piping within a through hole in a fire fighting area section, presses and closes the piping with a thermal expansion force of a fire resistant thermal expansion material in case of fire. Along an upper edge of a flexible and approximately rectangular inorganic fiber sheet containing thermal expansion material, a long fire resistant thermal expansion material having a rate of thermal expansion greater than that of the inorganic fiber sheet is disposed. These inorganic fiber sheet and fire resistant thermal expansion material are encapsulated with aluminum glass cloth to be formed into an encapsulated body. Along a side edge of the encapsulated body, a tab for sticking to a peripheral surface of piping is extended and formed, and an adhesive layer is provided at a position corresponding to the fire resistant thermal expansion material, on an outer surface of the encapsulated body.

Description

  The present invention relates to a fireproof sheet that is applied to a pipe made of a flammable material disposed through a fireproof compartment such as a fireproof wall or a floor slab and prevents propagation of fire damage through the pipe.

  Conventionally, when piping through fire prevention compartments, for fire prevention and disaster prevention, configure the piping itself with fire resistance such as metal or fire resistant double layer pipe that is not easily damaged by the heat of fire, When the piping itself has poor fire resistance, means for blocking the piping in the event of a fire and preventing the propagation of fire damage is provided in the piping path. To prevent this, it is possible to attach an annular fitting that supports a thermally expandable fireproof member to pipes with poor fire resistance, or to wrap the thermally expandable fireproof member around the pipe in the through hole of the fireproof compartment. ing. The one using the ring metal fitting is more expensive than the one that wraps the heat-expandable refractory member. Therefore, the one that wraps around is advantageous in terms of cost. The operation of winding the refractory member has a disadvantage that the winding operation is difficult because the gap between the inner surface of the through hole and the pipe is narrow. In order to eliminate this inconvenience, after slidably winding the heat-expandable refractory member around the pipe, it is slid and fixed to a predetermined position in the through hole, and then the gap is filled with mortar and backfilled. (See Patent Document 1).

  In addition, when the heat of a fire reaches the through hole of the fire prevention compartment, it is advantageous to close the opening in the vicinity of the opening of the through hole for quick fire shutoff rather than closing the pipe there. From the inside of the through hole to the outside of the through hole, it has also been proposed to extend and arrange the thermally expandable refractory member. In addition, recently, pipes such as flammable straight pipes and joints are covered with a sound insulating material to suppress noise leakage due to the fluid flowing through the pipe, but this sound insulating material is relatively poor in fire resistance. Therefore, strong and reliable fire prevention is desired in the fire prevention section.

JP 2000-240854 A

  The present invention provides an inexpensive fire-resistant sheet for flammable piping using a thermally expandable refractory member that can be easily attached to a flammable pipe already installed in a through-hole of a fire prevention compartment, and from within the through-hole. An object of the present invention is to provide a fireproof sheet for flammable piping that can be extended to the outside and that can powerfully and reliably block piping in the event of a fire.

  In the present invention, flammability of a type in which a pipe wrapped around a flammable pipe disposed in a through-hole of a fire prevention compartment and softened in the event of a fire is pressed and closed by the thermal expansion force of a refractory thermal expansion material. In the fireproof sheet for piping, a longitudinal fireproof thermal expansion material having a thermal expansion coefficient larger than that of the inorganic fiber sheet is arranged along the upper edge of the flexible substantially rectangular thermal expansion material-containing inorganic fiber sheet, These thermal expansion material-containing inorganic fiber sheet and refractory thermal expansion material are encapsulated with aluminum glass cloth to make an encapsulant, and the paste margin for sticking to the pipe circumference is extended along the side edge of this encapsulant By forming the adhesive layer on the outer surface of the enveloping body and corresponding to the refractory thermal expansion material, the above-described problems are solved.

  This longitudinal refractory thermal expansion material can be formed by packing a powder of a thermal expansion material such as thermal expansion graphite, or a band formed by kneading the thermal expansion material with a soft resin. In addition, if an opening that allows the pipe to flow out to the pipe when the refractory thermal expansion material is expanded is formed in the aluminum glass cloth that covers the longitudinal refractory thermal expansion material, rapid expansion can be obtained and Can be cut off.

  The fireproof sheet for flammable piping of the present invention has a longitudinal fireproof thermal expansion material adhered along the upper edge of a flexible, substantially rectangular thermal expansion material-containing inorganic fiber sheet. Adhesive at the position corresponding to the refractory thermal expansion material on the outer surface of the enveloping body and extending the adhesive margin for sticking to the pipe peripheral surface along the side edge of the enveloping body formed by encapsulating with cloth Since the layer is provided, the entire refractory sheet can be easily bent, and after inserting the tip part into the through-hole in a bent state, it can be easily attached to the peripheral surface of the pipe with an adhesive layer and adhesive. Even in a small place, the installation work can be performed efficiently. In addition, since the thermal expansion material-containing inorganic fiber sheet and the refractory thermal expansion material are encapsulated in an aluminum glass cloth, it is possible to maintain a state where the piping is surrounded in a wide range when foaming or thermal expansion is caused by a fire. Since pipes do not disperse, pipes can be plugged reliably and powerfully. In addition, the thermal expansion material-containing inorganic fiber sheet has good shape retention because the thermal expansion material contained therein expands in a fire and becomes entangled with inorganic fibers, making it difficult for the thermal expansion material to disperse. Therefore, the expansion of the refractory thermal expansion material having an expansion rate larger than the thermal expansion rate of the inorganic fiber sheet that expands thereafter can be induced to the inside of the piping, so that the disconnection of the piping is further ensured. In addition, these thermally expandable material-containing inorganic fiber sheets, refractory thermally expandable materials and other materials are available at a relatively low cost, and a fireproof sheet can be obtained at a low cost since the processing steps to the refractory sheet are simple. Furthermore, the thermal expansion material is waterproofed by wrapping with the aluminum glass cloth 2, quality maintenance can be performed to prevent the decomposition of inorganic fibers, and the entire shape and bent shape of the fireproof sheet can be maintained.

  The refractory heat-expandable material is made up of a band of heat-expandable powder such as heat-expandable graphite, or a band formed by kneading the heat-expandable material into a soft resin. An inflatable material can be produced, and a portion having a large coefficient of thermal expansion can be easily formed by laminating it with a thermally expandable material-containing inorganic fiber sheet, thereby improving the manufacturability and obtaining a fire-resistant sheet having good curvature. In addition, if an opening is formed in the aluminum glass cloth covering the longitudinal refractory thermal expansion material so that the expansion material can flow out toward the piping when the refractory thermal expansion material expands, Therefore, the expansion force of the expansion material can be concentrated quickly, and the piping can be blocked firmly and securely.

Inner side view of the fireproof sheet for flammable piping of the present invention Left side view of FIG. 1 is an enlarged cross-sectional view taken along line 1-1 in FIG. Explanatory drawing of the attachment state of the fireproof sheet for flammable piping of FIG. Explanatory drawing of the state where one side of the fireproof sheet for flammable piping of FIG. 1 is attached Explanatory drawing of a state in which a pair of flammable piping fireproof sheets of FIG. 1 is attached Illustration of backfill state Sectional view taken along line 8-8 in FIG. Cross section of connection Cross section of operating state Inside view of another embodiment of the fireproof sheet for flammable piping of the present invention

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment for carrying out the present invention will be described with reference to the drawings. In FIGS. 1 to 3, reference numeral 1 denotes a book in which a peripheral surface is encapsulated with an aluminum glass cloth 2 formed by overlaying mesh-like glass fibers on an aluminum foil. The fireproof sheet for combustible piping which concerns on invention is shown. The refractory sheet 1 has a thermal expansion coefficient higher than that of the inorganic fiber sheet 3 along the upper edge 17 of the thermally expandable material-containing inorganic fiber sheet 3 made of a substantially rectangular sheet-like inorganic fiber containing a heat expandable material such as graphite. A long refractory thermal expansion material 4 having a large length is attached, and the thermal expansion material-containing inorganic fiber sheet 3 and the long refractory thermal expansion material 4 are encapsulated with the aluminum glass cloth 2 to form an encapsulated body 5. And the paste margin 6 which extended from the aluminum glass cloth 2 and was apply | coated with the adhesive agent is provided in the both-sides edge and lower edge of this enveloping body 5, and it is the inner surface 7 of the encapsulating body 5, and it is a fireproof thermal expansion. The adhesive layer 8 is provided at a position corresponding to the material 4. The thermal expansion coefficient here means the volume expansion coefficient as a part.

  To explain this further, the thermally expandable material-containing inorganic fiber sheet 3 is made of, for example, a ceramic fiber mixed with pure thermal expandable graphite of about 9% by weight, acrylic latex or agglomerated material, and a thickness of about 2 mm by a papermaking method. The dimensions are formed to a width corresponding to about half of the circumference of the pipe 14 and a length about the nominal diameter of the pipe. In addition, as the fire-resistant thermal expansion material 4, a material having a thermal expansion coefficient larger than that of the inorganic fiber sheet 3 is used. In the example, the pure thermal expansion graphite powdered with aluminum foil is formed into a long string-like bag. A thin, well-curved material was used, but when the coefficient of thermal expansion could be reduced somewhat, a fire-resistant thermal expansion material such as thermal expansion graphite was kneaded into a soft resin and formed into a thin strip May be used.

  A release paper 16 is stuck on the surface of the adhesive margin 6 and the adhesive layer 8 until use. A slit 9 is provided in the middle portion in the width direction of the adhesive margin 6 provided at the lower edge so that it can be easily attached to the peripheral surface of the pipe.

  The action of the fireproof sheet 1 according to the present invention is such that the flammable hard vinyl chloride is covered with the sound insulating sheet 11 through the through hole 15 of the fireproof compartment 10 made of a floor slab as shown in FIGS. The case where it uses with respect to the piping 14 at the time of completing the connection of the combustible vinyl chloride straight pipe 13 coat | covered with the sound-insulation sheet | seat 11 at the joint made in 12 is demonstrated. In this case, two refractory sheets 1 are attached so as to surround the peripheral surface of the pipe 14, and as shown in FIG. 4, the refractory sheet 1 is curved in accordance with the curvature of the peripheral surface of the pipe 14. Then, the release paper 16 of the adhesive layer 8 is peeled off and the upper edge 17 enters about 2 cm into the through hole 15, and the first fireproof sheet 1 is attached to the joint 12 and the straight pipe 13 so as to cover the joint. 8 is attached to the sound insulating sheet 11, and each adhesive allowance 6 is also peeled off and attached to the sound insulating sheet 11. Subsequently, as shown in FIG. 5, the second refractory sheet 1 is curved in the same manner, and the upper edge 17 is made to enter the through-hole 15 so that the adhesive layer 8 and each adhesive allowance 6 are adhered to the sound insulating sheet 11. Then, as shown in FIG. 6, the attachment of the fireproof sheet 1 is completed with the pipe 14 surrounded. Then, the cement mortar 18 is backfilled in the gap between the through hole 15 and the pipe 14, and the fireproofing measures for the pipe 14 are finished. The use of the sound insulating sheet 11 is arbitrary. In the illustrated example, a sheet in which a flexible polyurethane foam, a vinyl chloride sheet, and a polyester spunbond are layered is used, and this is wound around the joint 12 and the straight pipe 13 to form a nonwoven fabric tape 20 However, other configurations may be used.

  FIG. 9 shows a cross-sectional view of the attachment portion of the refractory sheet 1. Since joints and straight pipes made of vinyl chloride generally have self-extinguishing properties, they do not spread even if the joints soften unless a flame reaches them. Therefore, as shown in FIG. The joints 12 and straight pipes 13 are crushed by the expanded inorganic fiber sheet 3 and the refractory thermal expansion material 4, and the influence of gas and the like accompanying the fire can be blocked at the position of the floor slab constituting the fire prevention compartment 10. In this case, since the inorganic fiber sheet 3 has good shape retention after thermal expansion, the internal pipe 14 can be isolated from the flame and sufficiently self-extinguished, and the coefficient of thermal expansion is large in the through hole 15. Since the refractory thermal expansion material 4 expands with the inner wall of the through-hole 15 as a repulsive base, the refractory thermal expansion material 4 efficiently expands in the piping direction, and the blocking effect is improved. In the event of a fire, first, the inorganic fiber sheet 3 expands, and when fire spread approaches the fireproof compartment 10, the refractory thermal expansion material 4 expands and a two-stage shut-off operation is performed.

  The longitudinal refractory thermal expansion material 4 is advantageous in terms of downsizing the refractory sheet 1 because a large expansion coefficient can be obtained even if the shape is small if a material in which the powder of thermal expansion graphite itself is packed is used. However, it is also possible to use a material obtained by kneading heat-expandable graphite, which is easy to handle, into a soft resin to form a belt-like body even if the shape becomes somewhat large and the thermal expansion coefficient decreases. In addition, if the opening part 19 which consists of a slit is formed in the aluminum glass cloth of the part which covers the longitudinal fireproof thermal expansion material 4, as FIG. Since the thermal expansion material springs out toward the pipe via 19, a large expansion can be obtained quickly.

  DESCRIPTION OF SYMBOLS 1 Fire-resistant sheet for flammable piping, 2 Aluminum glass cloth, 3 Thermal expansion material containing inorganic fiber sheet, 4 Fire-resistant thermal expansion material, 5 Enveloping body, 6 Paste, 7 Inner surface, 8 Adhesive layer, 9 Opening , 14 piping, 15 through holes, 17 upper edge,

Claims (3)

In a refractory sheet for a flammable pipe, which is wound around a flammable pipe disposed in a through-hole of a fire prevention compartment and is closed by pressing the softened pipe with a thermal expansion force of a refractory thermal expansion material in the event of a fire A longitudinal fire-resistant thermal expansion material having a larger coefficient of thermal expansion than that of the inorganic fiber sheet is disposed along the upper edge of the flexible, substantially rectangular thermal expansion material-containing inorganic fiber sheet. A fiber sheet and a refractory thermal expansion material are encapsulated with an aluminum glass cloth to form an encapsulant, and a paste margin is attached to the pipe peripheral surface along the side edge of the encapsulant and the encapsulant is formed. A fireproof sheet for flammable piping, characterized in that an adhesive layer is provided at a position corresponding to the fireproof thermal expansion material. The longitudinal fire-resistant thermal expansion material is formed by packing a powder of a thermal expansion material such as thermal expansion graphite, or a band formed by kneading the thermal expansion material with a soft resin. The fireproof sheet for combustible piping according to 1. 2. The aluminum glass cloth that covers the longitudinal fire-resistant thermal expansion material is formed with an opening that allows discharge toward the pipe when the fire-resistant thermal expansion material expands. Fireproof sheet for flammable piping.

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