JP3874493B2 - Outdoor installation type fireproof covering structure of communication cable protection tube - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an outdoor installation type fireproof coating structure for a communication cable protection tube, and in particular, prevents damage due to heating from the outside of a plurality of cable protection tubes having cables or the like built therein, and the construction thereof is more than conventional. It relates to a new improvement to greatly simplify.
[0002]
[Prior art]
For example, the structure shown in FIG. 4 has been employed as a fireproof covering structure for a cable protection tube of this type that has been conventionally used. That is, what is indicated by reference numeral 1 in FIG. 4 is a cable protection tube formed of vinyl chloride or iron and having a cable 2 inside, and a heat insulating material layer 3 such as rock wool is provided on the outer periphery of the cable protection tube 1. The exterior iron plate 4 is wound in a tubular shape.
[0003]
[Problems to be solved by the invention]
Since the conventional fireproof covering structure of the cable protection tube is configured as described above, the following problems exist. That is, since the iron plate (0.3 mm thick) was wound only around the outer periphery of the cable protection tube through only one heat insulating layer (50 mm thick) made of rock wool, the thickness was 50.3 mm. In addition, the weight is about 10 kg / m 2 and the construction (especially the winding of the iron plate) requires a great deal of labor and cost. In this construction, two steps of winding a rock wool and winding an iron plate were required.
Further, in the construction described above, there is a problem that dust from rock wool becomes an obstacle and the working environment is deteriorated.
[0004]
The present invention has been made to solve the above-described problems, and in particular, prevents damage from heating from the outside of a plurality of cable protection tubes having cables built therein, and the construction thereof is more than conventional. An object of the present invention is to provide an outdoor installation type fireproof covering structure of a communication cable protection tube which is greatly simplified.
[0005]
[Means for Solving the Problems]
The outdoor installation type fireproof covering structure for a communication cable protection pipe according to the present invention includes a cable that is positioned at the bottom of the inner wall of the communication cable protection pipe and that has a space between the upper part of the cable and the inner wall, A cable protection tube made of vinyl or iron and a plurality of the cable protection tubes connected to each other in the state of being arranged in parallel with each other and having a pair of heat-resistant films for preventing the passage of steam on the inner surface and the outer surface thereof 1 heat insulating material layer, a heat absorbing material formed on the outer periphery of the first heat insulating material layer, and containing water composed of a liquid or gel substance in a plurality of bags, and a second heat absorbing material provided on the outer periphery of the heat absorbing material. and the heat insulating material layer, the second Re et provided on the outer surface of the heat insulating material layer vinyl chloride, silicone rubber, and the enveloping member composed of a sheet material made of any of fluorine rubber, provided on the outer surface of said outer covering material metal Said board and said 1 heat insulating material layer, the refractory heat insulating member formed of a heat absorbing material and the second insulation material layer, the formed refractory heat insulating member laminate the outer covering material, the laminate by Velcro provided at its both end positions The end portions are connected, the heat-resistant film is in contact with the bag, the bag is broken by heat from the outside, and the steam generated by the moisture is blocked from passing by the heat-resistant film , outdoor installation type fire protection structure of the communication cable protection tube, characterized in that the cable protection tube so as to prevent temperature rise as adapted to use with installed outdoors.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the following, preferred embodiments of an outdoor installation type fireproof covering structure for a communication cable protection tube according to the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1, what is indicated by reference numeral 1 is a cable protection tube having a built-in communication cable 2 for signal transmission or the like formed of vinyl chloride or iron, and the outer periphery of the cable protection tube 1 is, for example, The first heat insulating material layer 3 made of ceramic blanket, glass wool, rock wool, felt such as glass felt and mat, etc. is provided, and the inner surface and the outer surface of the first heat insulating material layer 3 have a property of preventing vapor from passing therethrough. Heat-resistant films 3a and 3b are formed, and the outer surface of the heat-resistant film 3b is formed of two films 11a and 11b. The liquid is a liquid such as water or a liquid such as a polymer impregnated with water, or a gel-like substance. A heat-absorbing material 12 having a structure (shown in FIGS. 2 and 3) having a large number of bags 11 containing moisture 10 made of the material is provided. Material layer 13 is provided. In addition, the well-known outer covering material 18 and the metal plate 15 can be wound around the outer periphery of the second heat insulating material layer 13 or attached to a necessary portion without being wound. Further, in order to facilitate the construction, the fireproof and heat insulating member 14 is a laminate 20 formed by covering a single layer or multiple layers with a sheet material made of any one of vinyl chloride, silicon rubber, and fluorine rubber as an outer cover material 18, and both ends thereof. A magic tape or the like is provided at a position, and the ends of the laminate 20 can be connected to each other and wound around the cable protection tube 1. Further, if necessary, a stainless steel plate or an iron plate can be wound around the outer periphery or attached to a necessary portion without being wound. In addition, each of these heat insulating material layers 3 and 13 and the endothermic material 12 can be laminated as a single body when they are used as the laminated body 20 by covering them with the jacket material 18. The cable 2 is provided in the cable protection tube 1 in a state where it is in contact with the bottom 1b of the inner wall 1a of the cable protection tube 1 and has a space 1A between the upper portion 2a of the cable 2 and the inner wall 1a. A plurality of cable protection tubes 1 are provided in the fireproof heat insulating member 14.
[0007]
Each of the heat insulating material layers 3 and 13 and the heat absorbing material 12 constitute a fireproof heat insulating member 14, and each bag 11 of the heat absorbing material 12 is formed in a planar shape by a fused portion 12a formed in the X and Y directions shown in FIG. Only a square bag is formed.
The heat-resistant films 3a and 3b have a function of a vapor barrier for preventing high-temperature water vapor leaked by the rupture of the bag 11 during heating from reaching the cable protection tube 1 side, and this cable. It has the role of preventing temperature rise on the protective tube 1 side. Therefore, the heat-resistant films 3a and 3b are located on the inner surface and the outer surface of the first heat insulating material layer 3, but can be formed only on one of the inner surface and the outer surface of the first heat insulating material layer 3.
[0008]
Next, the operation will be described. When the refractory heat insulating member 14 is wound around the outer periphery of the cable protective tube 1 and ends thereof are joined with a velcro tape or the like, the refractory heat insulating member 14 is wound around the outer periphery of the cable protective tube 1 with one touch. Furthermore, the outer periphery of the refractory heat insulating member 14 can be fixed with a stainless steel band or the like. The refractory heat insulating member 14 can be reduced to a thickness of about ½ or less compared to the conventional structure, and the weight can be reduced by about 50%. Can be significantly lighter and thinner.
[0009]
In the above-described configuration, when a fire is applied to the surface 14A of the refractory heat insulating member 14 from the outside, the heat is effectively absorbed by the moisture 10 in the bag 11 of the heat absorbing material 12, and further heated to this bag 11 The high-temperature steam generated by the destruction by pressure is further effectively prevented by the heat-resistant films 3a and 3b, and the temperature of the cable protection tube 1 to 85 ° C. or higher, which is the softening temperature when the cable protection tube 1 is vinyl chloride. The rise can be prevented.
[0010]
As a result of the experiment, in the conventional configuration of FIG. 4, when a fire is added from the outside (fire class 2 heating test), the temperature of the cable protection tube 1 is set using the fireproof heat insulating member 14 according to the present invention. The temperature of the cable protection tube 1 is 30 ° after the fire protection class 2 heating test, and the maximum temperature of the tube outer surface is from 25 ° C to 44 ° C. It was confirmed that the minimum value of the temperature was 44 ° C. and the maximum value was 58 ° C. and sufficient heat resistance and fire resistance characteristics were obtained.
[0011]
【The invention's effect】
Since the outdoor installation type fireproof covering structure of the communication cable protective tube according to the present invention is configured as described above, it can be installed with one touch and can be easily attached without requiring skill. In addition, since the weight can be significantly reduced as compared with the conventional one and the heat absorption effect is great, damage to the cable protection tube and the communication cable accommodated therein due to heat can be completely prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a refractory heat insulating material according to the present invention.
FIG. 2 is a partially enlarged view of FIG.
3 is a perspective view of a main part of the refractory heat insulating material of FIG. 1. FIG.
FIG. 4 is a cross-sectional view showing a conventional configuration.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cable protective tube 1a Inner wall 1b Bottom part 1A Space 2 Cable 2a Upper part 3,13 1st, 2nd heat insulating material layer 10 Moisture 11 Bag 12 Endothermic material 3a, 3b Heat-resistant film 14 Fireproof heat insulating member 15 Metal plate 18 Cover material 20 Lamination body

Claims (1)

The cable (2) is positioned at the bottom (1b) of the inner wall (1a), and there is a space (1A) between the upper part (2a) of the cable (2) and the inner wall (1a). The cable protection pipe (1) made of vinyl chloride or iron and the plurality of cable protection pipes (1) are joined to each other in the state where they are arranged side by side, and the passage of steam is allowed to pass through the inner surface and the outer surface. A first heat insulating material layer (3) having a pair of heat-resistant films (3a, 3b) for blocking, and a liquid or gel formed in the outer periphery of the first heat insulating material layer (3) in a plurality of bags (11) A heat-absorbing material (12) containing moisture (10) made of a particulate material, a second heat-insulating material layer (13) provided on the outer periphery of the heat-absorbing material (12), and the second heat-insulating material layer (13 Re et al on the outer surface vinyl chloride, silicone rubber), and the enveloping member composed of a sheet material made of any of fluorine rubber (18), said outer covering material (18) a metal plate provided on the outer surface of (15) And the first A heat-resistant and heat-insulating member (14) is formed by the heat-insulating material layer (3), the heat-absorbing material (12) and the second heat-insulating material layer (13), and the laminate is formed by the fire-resistant and heat-insulating member (14) and the jacket material (18). (20) is formed, and the laminated body (20) is connected to each end by a magic tape provided at both end positions, and the heat-resistant film (3b) is in contact with the bag (11). , the bag (11) is blocked passed by the steam the heat layer generated by the water are destroyed by the heat from the outside (3b), the cable protection tube and to prevent the temperature rise (1) An outdoor installation type fireproof covering structure for a communication cable protection tube, characterized in that it is installed and used outdoors.

Images