JPH0595133U - Fireproof structure of the penetration part of the heat insulation cladding in the fireproof compartment - Google Patents

Abstract

(57) [Summary] [Purpose] Easy to install, no need to work under the floor, you can install a large number of heat-insulated pipes at once, heat resistance,
Make it excellent in fire resistance. [Structure] A fireproof sleeve 3 is arranged in a through hole 2 of a fireproof compartment 1, a heat insulation cladding pipe 4 is penetrated into the fireproof sleeve 3, and the bottom of the fireproof sleeve 3 is fireproofed. The partition plate 5 is arranged. Further, on the fire-resistant partition plate 5, the periphery of the heat-insulating cladding tube 4 is wrapped with a heat-expandable refractory material 6, and the outer periphery of the heat-expandable fire-resistant material 6 has a strength that is not deformed and destroyed by the expansion. 7 is provided, and the space inside the refractory sleeve 3 is filled with the refractory filler 8. [Effect] Only work on the floor is required, the workability is good, the construction space is reduced, the flexibility of piping in a narrow ceiling space is increased, and it has excellent fire resistance and heat resistance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The fireproof structure of the present invention relates to a fireproof structure suitable for a penetration portion through which a heat insulation coating pipe penetrates a fire protection partition such as a floor or a wall of a building, and in particular, a large number of heat insulation coating pipes are used for the fire protection partition. It is suitable as a fireproof structure when it penetrates the body.

[0002]

[Prior Art]

 In buildings such as factories and buildings, through-holes are opened in the fireproof compartments such as floors and walls, and long lengths such as heat-insulating cladding pipes for refrigerant passages, cables, and resin pipes penetrate therethrough. In this case, fire protection measures must be taken by filling back the gap between the through hole and the long object with refractory material.

Therefore, conventionally, when a heat insulating coating pipe or the like is penetrated, a fireproof structure as shown in FIG. 7 is used. In the fireproof structure of FIG. 7, a nonflammable steel pipe A as a protective pipe is arranged so as to vertically project into a through hole C of a fireproof partition (floor) B, and mortar D is filled in the gap between the two. Then, insulate the steel pipe A with a heat-insulating coating pipe (a copper pipe with a heat-insulating coating on the outer circumference) E for the refrigerant passage, and around the heat-insulating coating pipe E at both ends in the axial direction of the steel pipe A. The thermal expansion refractory material F is wound, and the outside of the thermal expansion refractory material F is covered with a presser foot G that is divided into two parts. It is designed to expand only to the side).

In the fireproof structure of FIG. 7, when a fire occurs under the fireproof compartment B (underfloor), the heat insulating coating layer (combustible material such as polyethylene foam) H of the heat insulating cladding E exposed under the floor H When disappears, the thermal expansion refractory material F under the floor expands inwardly, the space where the heat insulating coating layer H disappears is filled, and flames, smoke, and the like under the floor do not propagate to the floor.

In the fireproof structure of FIG. 7, the thermal expansion refractory material F is not used, and the heat insulation coating layer H of the heat insulation coating pipe E that is piped in the steel pipe A is removed. Compared with the fire prevention structure filled with non-combustible material, there is an advantage that there is no concern about condensation, but there were the following problems.

[0006]

[Problems to be solved by the device]

 1. Since the upper and lower sides of the fire protection compartment (floor) B have a symmetrical structure, it is necessary to work not only above (on the floor) but also below (under the floor) the fire protection compartment B, which requires work at high places. No, the working conditions such as handling were bad, and the construction efficiency was poor. 2. When a large number of heat-insulated cladding pipes E are penetrated, the steel pipe A is placed through each of the heat-insulated sheathed pipes E in the through-hole C of the fire protection compartment B, and the mortar D is filled and fixed on the outside thereof. In addition, it was necessary to attach the thermal expansion refractory material F and the holding metal fitting G, which made the work troublesome. 3. In order to prevent the strength of the fire protection compartment B from decreasing, the steel pipe A cannot be installed in close contact with the fire protection compartment B, and at least 10 cm from the inner peripheral surface of the through hole C of the fire protection compartment B to the outer peripheral surface of the steel pipe A. Degrees should be separated. For this reason, a wide space is required, and construction is difficult in a narrow pipe shaft space. 4. The projecting length of the steel pipe A under the floor is also required to be 20 to 30 cm, which is difficult when the heat insulation coating pipe E has to be bent at a right angle in a narrow space space or floor space.

The present invention is easy to install, and in particular, it is not necessary to work under the floor, and it is possible to install a large number of adiabatic cladding pipes installed in a narrow space all at once, and further, heat resistance and fire resistance. To provide an excellent fire protection structure.

[0008]

[Means for Solving the Problems]

 1 to 3, the fireproof structure of the present invention has a refractory sleeve 3 arranged in a through hole 2 of a fireproof compartment 1 and a heat insulation coating pipe 4 in the fireproof sleeve 3. The fire-resistant partition plate 5 is arranged at the bottom of the fire-resistant sleeve 3, and the heat-expandable fire-resistant material 6 is provided around the heat-insulating cladding pipe 4 on the fire-resistant partition plate 5 so that A refractory reinforcement 7 having a strength that is not deformed and broken by expansion thereof is installed on the outer periphery, and a refractory filler 8 is filled in the remaining space in the refractory sleeve 3.

[0009]

[Action]

 In the fireproof structure of the present invention, the heat of the fire causes the expansive refractory material 6 to expand. In this case, the thermally expansive refractory material 6 is constrained by the refractory reinforcement 7 and therefore cannot expand to the outside, but exclusively expands to the inside (the side of the heat insulating coating 4). Therefore, the space formed by the heat insulating coating layer 9 of the heat insulating coating pipe 4 burned out by a fire is reliably closed by the expanded thermally expansive refractory material 6.

[0010]

【Example】

 An embodiment of the fireproof structure of the present invention will be described in detail with reference to FIGS. 1 to 3, reference numeral 1 is a fireproof partition (floor), 2 is a through hole opened in the fireproof partition, 3 is a horizontally long tubular fireproof sleeve embedded in the inner periphery of the through hole 2, Reference numeral 4 is a heat-insulating sheathed pipe that penetrates through the refractory sleeve 3. The heat insulation coating pipe 4 is, for example, a copper pipe 10 provided with a heat insulation coating layer 9 made of flame-retardant expanded polyethylene or the like.

Reference numeral 5 in FIGS. 1 to 3 indicates a fire-resistant partition plate made of a non-combustible material, which is disposed on the bottom of the fire-resistant sleeve 3 (for example, a fire-resistant partition plate containing calcium silicate as a main component: commonly known as a calical plate). , 6 are heat-expandable fireproof materials provided on the fireproof partition plate. The heat-expandable refractory material 6 is piled up around the heat insulation coating pipe 4 to a height of about 50 mm, for example. Further, the thickness of the heat-expandable refractory material 6 (thickness in the lateral direction in FIG. 3) is sufficient if it is 50% or more of the heat insulation coating layer 9 of the heat insulation coating pipe 4.

As the above-mentioned heat-expandable refractory material 6, for example, DANSIL-D (trade name: manufactured by Furukawa Electric Co., Ltd.) is suitable. This Dansheal-D is a flexible sheet-like material formed of a putty-like composition that has not been foamed (expanded), has a large heat capacity and a high density, and is expanded and expanded by heat. In addition, after foaming, it transforms into an ash product with excellent heat insulation properties, so it exhibits a very high heat insulation effect. Therefore, although the foaming speed is relatively low, the space of the disappeared trace of the heat insulating coating layer 9 of the heat insulating coating pipe 4 is closed by a strong pressing force, and a very high heat insulating effect is obtained.

Reference numeral 7 in FIGS. 1 to 3 denotes a refractory reinforcement arranged on the outer periphery of the thermally expansive refractory material 6. The refractory reinforcement 7 of this embodiment is formed by filling a refractory material at the same height as the thermally expansive refractory material 6. The fire-resistant reinforcement 7 is made of a material that does not deform or break even when the heat-expandable fire-resistant material 6 expands and can be easily removed when the heat-insulating cladding 4 is buried or removed. Good to do. Suitable for this purpose are, for example, flame-retardant silicone rubber, cut seal W, morlite or rock wool having a density of 250 kg / m ³ or more.

Reference numeral 8 in FIGS. 1 to 3 denotes a refractory filler, which is filled in the remaining inner space of the refractory sleeve 3. As the refractory filler 18, a non-combustible material such as rock wool, ceramic felt, morlite, cut seal W or a flame retardant material such as silicone foam is suitable.

A steel plate may be used for the refractory reinforcement 7, and it may be arranged so as to surround the outer circumference of the thermally expansive refractory material 6 as shown in FIG. In this case, it is preferable to add reinforcing ribs or beats to the steel sheet in order to prevent the steel sheet from being deformed.

As the fire-resistant reinforcement 7, a fire-resistant partition plate containing calcium silicate as a main component or a fire-resistant partition plate containing a ceramic material as a main component is used. It is also effective to install it on the outer circumference of 6.

Further, as shown in FIG. 6, a curable flame-retardant epoxy resin may be coated on the surface of the heat-expandable refractory material 6 to a thickness of 2 to 5 mm to form the fire-resistant reinforcement body 7.

[0018]

[Effect of the device]

 The fireproof structure of the present invention has the following effects. ． Conventional fire protection structures required work under the floor, but the fire protection structure of the present invention requires only work from above the floor, greatly improving workability. ． Since a large number of heat insulation coating pipes 4 can be collectively installed, workability is improved also in this respect, and the installation space can be greatly reduced. ． Since the fire protection structure does not project below the floor, the flexibility of piping in a narrow ceiling space is increased. ． Since the thermal expansion refractory material 6 is used, it has excellent fire resistance and heat resistance.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a fireproof structure of the present invention.

FIG. 2 is a vertical cross-sectional plan view of the fireproof structure according to the embodiment.

FIG. 3 is a vertical sectional side view of the fireproof structure according to the embodiment.

FIG. 4 is a vertical sectional side view showing a second embodiment of the fire protection structure of the present invention.

FIG. 5 is a vertical sectional side view showing a third embodiment of the fire protection structure of the present invention.

FIG. 6 is a vertical sectional side view showing a fourth embodiment of the fire protection structure of the present invention.

FIG. 7 is a vertical cross-sectional view showing an example of a conventional fire protection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fireproof partition 2 Through hole 3 Fireproof sleeve 4 Thermal insulation cladding 5 Fireproof partition plate 6 Thermal expansion fireproof material 7 Fireproof reinforcement 8 Fireproof filler

Claims (1)

[Scope of utility model registration request] 1. A fire resistant sleeve 3 is arranged in a through hole 2 of a fireproof compartment 1, and a heat insulating sheathing pipe 4 is penetrated into the fire resistant sleeve 3 to form a fire resistant sleeve 3. A fire-resistant partition plate 5 is arranged at the bottom, and a heat-expandable refractory material 6 is provided around the heat-insulating cladding tube 4 on the fire-resistant partition plate 5, and the heat-expandable fire-resistant material 6 has a strength that is not deformed and destroyed by its expansion. Fireproof reinforcement 7
And a space inside the remaining fireproof sleeve 3 is filled with a fireproof filler 8. A fireproof structure of a heat insulating cladding penetration portion in a fireproof partition.