Fire extinguishing equipment and installation methods for fire extinguishing equipment

Abstract

To provide a fire-fighting apparatus that allows fire-fighting measures to be taken for a cable tray with an inclination angle, and a construction method of fire-fighting equipment.SOLUTION: Fire-fighting equipment includes a fire-fighting tube in which a compressed fire-extinguishing agent is encapsulated in a tube-like container, and which discharges the fire-extinguishing agent when the outer cover of the container melts by heating, and a cable tray in which cables are laid, and on which a plurality of fire-extinguishing tubes are installed along a laying direction of the cables. The plurality of fire-extinguishing tubes are arranged so that the arrangement density of the cable tray arranged above in a prescribed length set to the cable tray increases as an inclination angle in the laying direction of the cable tray increases.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire extinguishing system used for fire prevention measures for cable facilities and a method for installing the fire extinguishing system. [Background technology]

[0002] A fire extinguishing tube is known that is installed in a cable tray in which cables including cables or electric wires are laid, and that sprays a fire extinguishing agent at a fire point on the cables (see, for example, Patent Document 1). The fire extinguishing tube described in Patent Document 1 is configured so that a fire extinguishing agent is sealed in a tubular container, and when a fire occurs, the container melts and the fire extinguishing agent is sprayed from the melted point. This fire extinguishing tube is installed in a serpentine manner relative to the laying direction of the cable tray. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2000-510737 Summary of the Invention [Problem to be solved by the invention]

[0004] Cable trays may be arranged at an inclination angle, including vertical, depending on the condition of the installation location, such as a wall surface. If a fire breaks out in an inclined cable tray, the flames tend to spread upward along the laying direction of the cables. According to the technology described in Patent Document 1, if a cable tray is inclined, there is a risk that extinguishing agent will remain in the fire extinguishing tube arranged below the cable tray in the event of a fire, resulting in insufficient fire extinguishing.

[0005] An object of the present invention is to provide a fire extinguishing device and a method for installing a fire extinguishing facility that can take fire prevention measures for cable trays with an inclined angle. [Means for solving the problem]

[0006] One aspect of the present invention is a fire extinguishing tube in which a pressurized fire extinguishing agent is sealed in a tubular container, and the outer shell of the container melts when heated to release the fire extinguishing agent; and a cable tray in which cables are laid and a plurality of the fire extinguishing tubes are installed along the laying direction of the cables, wherein the plurality of fire extinguishing tubes are arranged so that the arrangement density of the fire extinguishing tubes arranged upward increases as the inclination angle, which is the angle formed by the laying direction and the horizontal direction, increases, and the inclination angle is equal to or greater than 0 degrees and equal to or less than 90 degrees. The plurality of fire extinguishing tubes are arranged such that, as the inclination angle increases, the arrangement width from the top to the bottom of the plurality of fire extinguishing tubes decreases and the arrangement density within the arrangement width increases. It is a fire extinguishing equipment.

[0007] According to the present invention, a fire prevention measure can be taken for an inclined cable tray. According to the present invention, the installation density of the plurality of fire extinguishing tubes in the region above the cable tray can be increased as the inclination angle of the cable tray increases, thereby improving the fire extinguishing performance against a flame that spreads upward.

[0008] In addition, the plurality of fire extinguishing tubes of this embodiment are As the tilt angle increases, The fire extinguishing tubes may be arranged so that the arrangement width from the top to the bottom of the plurality of fire extinguishing tubes decreases and the arrangement density within the arrangement width increases.

[0009] According to the present invention, it is possible to realize an arrangement of fire extinguishing tubes with an increasing arrangement density going upward.

[0010] In addition, the plurality of fire extinguishing tubes of the present invention may be arranged so that the arrangement density increases upward within the predetermined length.

[0011] According to the present invention, it is possible to realize an arrangement of fire extinguishing tubes with an increasing arrangement density going upward.

[0012] Furthermore, the fire extinguishing tube of the present invention is arranged such that its axis intersects with the laying direction.

[0013] According to the present invention, even if the cable tray is laid at an inclination angle, a fire prevention measure can be taken in which the extinguishing agent in the fire extinguishing tube does not remain in the fire in the event of a fire.

[0014] In addition, the fire extinguishing tubes of the present invention may be arranged in a direction in which they are installed on both sides of the cable tray along the laying direction.

[0015] According to the present invention, by arranging a plurality of fire extinguishing tubes in parallel with the width direction of the cable tray, a fire prevention measure can be taken in which the extinguishing agent in the fire extinguishing tubes does not remain in the fire in the event of a fire.

[0016] Furthermore, in the present invention, when the tilt angle is 90 degrees, the arrangement width may be equal to or less than half of the predetermined length.

[0017] According to the present invention, when a cable tray is arranged on a vertical surface such as a wall surface, fire spreading upward can be reliably extinguished.

[0018] Furthermore, the present invention may further include a heat-resistant sheet that covers the cables and the plurality of fire extinguishing tubes in the cable tray.

[0019] According to the present invention, by covering cables, fire extinguishing tubes, and cable trays with fire-resistant sheets, in the event of a fire, the storage space formed within the fire-resistant sheets can be filled with fire extinguishing agent, thereby improving fire extinguishing performance.

[0020] One aspect of the present invention is a method for installing a fire extinguishing system in which a fire extinguishing tube is installed in a cable tray in which cables are laid, the fire extinguishing tube containing a pressurized fire extinguishing agent sealed in a tubular container, and the outer shell of the container is melted by heating to release the fire extinguishing agent, Cables Laying direction is the angle between the horizontal and setting a tilt angle; As increases, The above-mentioned Fire extinguishing tube As the placement density of On top and setting an arrangement of the plurality of fire extinguishing tubes within an arrangement width from the top of the fire extinguishing tube to the bottom of the plurality of fire extinguishing tubes. The tilt angle is greater than or equal to 0 degrees and less than or equal to 90 degrees. This is a method for installing fire extinguishing equipment.

[0021] According to the present invention, it is possible to design in advance fire protection measures for inclined cable trays. According to the present invention, as the inclination angle of the cable tray increases, the installation density of multiple fire extinguishing tubes in the area above the cable tray increases, thereby enabling a design that improves fire extinguishing performance against flames that spread upward.

[0022] The present invention may also include a step of installing a plurality of the fire extinguishing tubes in the cable tray based on the arrangement.

[0023] According to the present invention, a plurality of fire extinguishing tubes can be installed in an angled cable tray in a fire-safe arrangement.

[0024] The present invention may also include a step of covering the cable tray on which the plurality of fire extinguishing tubes are installed with a heat-resistant sheet.

[0025] According to the present invention, the fire extinguishing performance of the cable tray in the event of a fire can be improved. [Effects of the Invention]

[0026] According to the present invention, a fire prevention measure can be taken for a cable tray with an inclined angle. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 2 is a front view showing a schematic configuration of the fire extinguishing equipment. [Figure 2] FIG. 10 is a side view showing the configuration of a fire extinguishing system having cable trays with different inclination angles. [Figure 3] 1 is a flowchart showing each step of a method for installing a fire extinguishing system. [Figure 4] FIG. 10 is a front view schematically showing the configuration of a fire extinguishing system according to a modified example. [Figure 5]FIG. 10 is a front view schematically showing the configuration of a fire extinguishing system according to a modified example. [Figure 6] FIG. 10 is a front view schematically showing the configuration of a fire extinguishing system according to a modified example. [Figure 7] FIG. 10 is a front view schematically showing the configuration of a fire extinguishing system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0028] Hereinafter, a fire extinguishing device and a method for installing a fire extinguishing facility according to an embodiment of the present invention will be described with reference to the drawings.

[0029] As shown in FIG. 1, the fire extinguishing system 1 includes a cable tray C to be installed on an installation target, and a plurality of fire extinguishing tubes F arranged on the cable tray C. The cable tray C is a support structure for installing cables K, such as a plurality of power lines and a plurality of communication lines, in power facilities such as a nuclear power plant. The cable tray C may be installed on a horizontal installation target such as a floor or ceiling, or may be installed on an installation target at an inclined angle relative to the horizontal plane, such as a wall, an inclined surface, or an aerial installation. Below, the cable tray C is shown in a state where it is inclined in the laying direction of the cables K. FIG. 1 illustrates a cable tray C with an inclination angle of 90 degrees.

[0030] The cable tray C is formed, for example, from a plate-shaped metal material. The cable tray C includes, for example, a pair of side plates C1 and C2 arranged opposite each other. The side plates C1 and C2 are formed in the shape of rectangular strips. The side plates C1 and C2 are arranged upright so that their longitudinal directions are aligned with the laying direction of the cables K (z-axis direction). The side plates C1 and C2 are arranged so that their lateral directions are aligned with the horizontal direction (y-axis direction).

[0031] One side (+y side) of the pair of side plates C1, C2 in the short direction is connected to the other side (-y direction) of multiple cross beams C3. The cross beam C3 is formed in a rectangular plate shape. The longitudinal direction of the cross beam C3 is arranged along a direction perpendicular to the longitudinal direction of the side plates C1, C2 (x-axis direction). The short direction of the cross beam C3 is arranged along the laying direction of the cables K (z-axis direction). As a result, the other surface of the multiple cross beams C3 in the cable tray C forms the laying surface of the cables K, and the cables K are laid thereon. On the other side (-y side) of the cables K, multiple fire extinguishing tubes F are installed along the laying direction of the cables K.

[0032] The number of fire extinguishing tubes F to be installed is set, for example, for each predetermined length L of the cable tray C. Because the cable tray C can be several kilometers long, the fire extinguishing equipment 1 is divided and managed into units based on the predetermined length L. The predetermined length L is set, for example, to several meters to several tens of meters. In the cable tray C, the amount of fire extinguishing agent required is predetermined for each protected volume that includes the area to be extinguished. The number of fire extinguishing tubes F to be installed is determined, for example, based on the amount of fire extinguishing agent specified for each protected volume. Therefore, the number of fire extinguishing tubes F to be installed is set based on the amount of fire extinguishing agent for the protected volume corresponding to the predetermined length L.

[0033] The plurality of fire extinguishing tubes F are arranged so that the number of them installed is greater in the upper half of the cable tray C than in the lower half of the cable tray C. The plurality of fire extinguishing tubes F are arranged based on an arrangement method described below. The fire extinguishing tube F includes, for example, a tubular container F1. The fire extinguishing tube F is filled with a pressurized fire extinguishing agent, and when heated, the outer shell of the container melts to release the fire extinguishing agent. The container F1 has a storage space for storing the fire extinguishing agent. The container F1 is formed of, for example, a resin material.

[0034] A lid F2 is provided at each end of the container F1 to close the opening. A pressurized fire extinguishing agent is sealed in the storage space inside the container F1. When the outside of the container F1 is heated, the outer shell melts, and the fire extinguishing agent is released from the melted part based on the internal pressure of the storage space. The fire extinguishing tubes F are, for example, straight. Each fire extinguishing tube F is arranged, for example, in a direction that bridges a pair of side plates C1, C2 on both sides along the laying direction of the cable tray C. The entire length of the fire extinguishing tube F is adjusted to a length that can be bridged in the width direction of the cable tray C and protrudes from the entire width of the cable tray C so that a heat-resistant sheet T, described below, can be wound around it.

[0035] Each fire extinguishing tube F is arranged with its axis intersecting the installation direction, preferably horizontally. By arranging the axis of the fire extinguishing tube F horizontally, it is possible to prevent extinguishing agent from remaining in the container F1 when the fire is extinguished.

[0036] Adjacent fire extinguishing tubes F are arranged parallel to each other and at equal intervals. The fire extinguishing tubes F are fixed to the cable tray C using, for example, a fixing member (not shown) that is fixed to the cable tray C by screws. The fixing member is made of a material with high thermal conductivity, such as metal, so that when heat from a fire is transmitted to the cable tray C, the heat can be easily transmitted to the fire extinguishing tubes F.

[0037] The cable tray C and the multiple fire extinguishing tubes F are covered with a heat-resistant sheet T. The heat-resistant sheet T is made of a flame-retardant film material. The cable tray C is wrapped with the heat-resistant sheet T to form a storage space S for cables K. In the event of a fire breaking out in the storage space S and the flames propagate upward within the storage space S, the temperature in the upper part of the storage space S is more likely to rise than in the lower part. In this case, the containers F1 of the multiple fire extinguishing tubes F arranged at the top of the storage space S melt, filling the storage space S with fire extinguishing agent and extinguishing the flames in the storage space S. If the cable tray C is installed in a narrow space such as a pipeline or if it is guaranteed that the fire extinguishing agent will flow downward, the heat-resistant sheet T may not be necessary.

[0038] Next, a method for arranging the fire extinguishing tubes in the fire extinguishing system 1 will be described.

[0039] As shown in Figure 2, the fire extinguishing system 1 may be installed with the cable tray C at an inclination angle θ greater than 0 degrees. The speed at which a flame spreads upward within the storage space S of the cable tray C increases as the inclination angle θ increases. Based on the above phenomenon, the multiple fire extinguishing tubes F in the fire extinguishing system 1 are positioned closer to the upper side of the cable tray C in accordance with the increase in the inclination angle θ.

[0040] Specifically, the plurality of fire extinguishing tubes F are arranged so that as the inclination angle θ in the laying direction of the cable tray C of the predetermined length L increases, the arrangement width H from the upper part CT of the cable tray C of the predetermined length L to the lowermost part FB of the plurality of fire extinguishing tubes F decreases compared to the predetermined length L, and the arrangement density within the arrangement width H increases. The plurality of fire extinguishing tubes F are arranged, for example, at equal intervals within the arrangement width H.

[0041] The inclination angle θ of the cable tray C is 0 degrees When the inclination angle θ of the cable tray C is close to , the speed at which the flame spreads upwards in the cable tray C is low, and the arrangement width H of the plurality of fire extinguishing tubes F is set to a value close to the predetermined length L of the cable tray C. As the inclination angle θ of the cable tray C increases, the distance between the lowest part FB of the plurality of fire extinguishing tubes F and the lower part CB in the predetermined length L of the cable tray C increases, and the arrangement width H is set to decrease.

[0042] When the inclination angle is 90 degrees, for example, the array width H is set to less than half the predetermined length L of the cable tray C. The set value of the array width H is arbitrary, and may be set according to the speed of upward flame spread, which varies depending on the type, quantity, diameter, and other conditions of the cables K. Furthermore, the array width H may be set appropriately based on calculated values ​​obtained through simulations or experimental data.

[0043] Next, we will explain the installation method of the fire extinguishing system 1. The installation method of the fire extinguishing system may be applied not only to a newly installed cable tray C, but also when installing a fire extinguishing tube in an existing cable tray C.

[0044] 3 shows each step of the installation method for the fire extinguishing equipment 1. In the installation method for the fire extinguishing equipment 1, an operator sets a predetermined length L of the cable tray C along the laying direction of the cables K (step S100). The predetermined length L is set for each unit when managing the cable tray C. The cable tray C is assigned an ID for each division of the predetermined length L, and the IDs are stored in a database. The operator sets the number of fire extinguishing tubes F to be installed in the cable tray C according to the predetermined length L (step S102).

[0045] In order to prevent installation costs from increasing, the worker sets the optimal number of fire extinguishing tubes F that can ensure fire extinguishing performance within the specified length L based on specified conditions such as the type, material, diameter, burning rate, and amount of fire extinguishing agent contained in the fire extinguishing tubes F of the cables K contained within the specified length L of the cable tray C.

[0046] The worker sets the inclination angle θ in the laying direction of the cable tray C (step S104). The worker sets the inclination angle θ in the laying direction of the cable tray C based on the installation conditions of the cable tray C of a predetermined length L that is the object of management. The worker identifies the installation target for the cable tray C, such as a wall surface, an inclined surface, or a ceiling surface. The worker sets the inclination angle θ in the laying direction of the cable tray C based on the type of direct fixing method or indirect fixing method such as hanging when installing the cable tray C on the installation target.

[0047] The worker sets the arrangement width H from the top CT of the cable tray C to the bottom FB of the multiple fire extinguishing tubes F over the predetermined length L to be smaller than the predetermined length L according to the tilt angle θ (Step S106). The worker sets the arrangement width H based on the estimated speed at which a fire will spread upward according to the tilt angle θ of the cable tray C. The worker sets the arrangement width H to be narrower according to the increase in the tilt angle θ. The worker sets the arrangement of the multiple fire extinguishing tubes F within the arrangement width H (Step S108). The worker increases the density of the multiple fire extinguishing tubes F within the arrangement width H and sets an arrangement that moves the multiple fire extinguishing tubes toward the top of the cable tray C. The worker installs the multiple fire extinguishing tubes F on the cable tray C along the laying direction of the cables K based on the set arrangement of the multiple fire extinguishing tubes F (Step S110). The worker covers the cable tray C on which the multiple fire extinguishing tubes F are arranged with a heat-resistant sheet T (Step S112).

[0048] As described above, the fire extinguishing system 1 can provide fire prevention measures for inclined cable trays. By arranging multiple fire extinguishing tubes so that their installation density is increased on the upper side of the inclined cable tray, the multiple fire extinguishing tubes can function when a fire spreads upward, improving fire prevention. The fire extinguishing system 1 can set the arrangement of the multiple fire extinguishing tubes F according to the speed at which a fire spreads upward by setting the arrangement width of the multiple fire extinguishing tubes F according to the inclination angle θ of the cable tray C.

[0049] [Variations] The arrangement of the plurality of fire extinguishing tubes F of the fire extinguishing system 1 may be changed as appropriate. Hereinafter, the same configurations as those in the above embodiment will be designated by the same names and symbols, and duplicated explanations will be omitted as appropriate.

[0050] When a general-purpose fire extinguishing tube F is used, it may be formed to be longer than the width of the cable tray C. In this case, each fire extinguishing tube F may be bent and arranged so that its axis snakes in the laying direction of the cable tray C. For example, when multiple fire extinguishing tubes F are arranged at a high array density within the array width H, they may be arranged not only in parallel but also based on other arrangement methods.

[0051] As shown in Figure 4, each fire extinguishing tube F may be provided with one bent portion and arranged in a U-shape relative to the laying direction of the cable tray C. In this case, each fire extinguishing tube F melts from below when a fire spreads upward, so no extinguishing agent remains in the fire extinguishing tube F. According to this fire extinguishing system 1, even if the total length of each fire extinguishing tube F is longer than the width direction of the cable tray C, the axis of the fire extinguishing tube F is arranged parallel to the horizontal direction within the arrangement width H, thereby reducing the amount of extinguishing agent remaining in the event of a fire.

[0052] As shown in Figure 5, each fire extinguishing tube F may be provided with, for example, multiple bent portions and arranged in a serpentine pattern relative to the laying direction of the cable tray C. According to this fire extinguishing system 1, even if the overall length of each fire extinguishing tube F is longer than the width direction of the cable tray C, the axis of each fire extinguishing tube F can be arranged parallel to the horizontal direction within the arrangement width H. According to this fire extinguishing system 1, fire prevention measures can be taken to prevent the extinguishing agent in the fire extinguishing tube F from remaining in the event of a fire, even if the cable tray C is inclined.

[0053] As shown in Figure 6, the cable tray C may be inclined at an angle θ in the laying direction when the width direction of the cable tray C is installed along a wall surface. In this case, each fire extinguishing tube F may be arranged parallel to the horizontal direction. In this case, each fire extinguishing tube F may be provided with one or more bent portions as shown in Figures 4 and 5. According to this fire extinguishing system 1, even if the cable tray C is inclined at an angle θ in the laying direction when the width direction of the cable tray C is installed along a wall surface, fire prevention measures can be taken to prevent the extinguishing agent in the fire extinguishing tube F from remaining in the cable tray C in the event of a fire.

[0054] As shown in Figure 7, the fire extinguishing tubes F may be arranged so that their installation density increases upward. For example, the fire extinguishing tubes are arranged so that a second distance L2 between each adjacent fire extinguishing tube above is shorter than a first distance L1 between each adjacent fire extinguishing tube below. With this fire extinguishing system, in the event of a fire where temperatures increase upward, multiple fire extinguishing tubes can be activated when the flames spread upward, improving fire prevention performance.

[0055] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents. [Explanation of symbols]

[0056] 1 Fire extinguishing equipment C Cable Tray CB bottom CT upper part F Fire extinguishing tube F1 container FB bottom H array width K Cables L specified length T Heat-resistant sheet θ Tilt angle

Claims

1. a fire extinguishing tube in which a pressurized fire extinguishing agent is sealed in a tubular container, and an outer shell of the container melts when heated to release the fire extinguishing agent; a cable tray in which cables are laid and in which a plurality of the fire extinguishing tubes are installed along the laying direction of the cables; As the inclination angle, which is the angle between the laying direction and the horizontal direction, increases, the plurality of fire extinguishing tubes are arranged so that the arrangement density of the fire extinguishing tubes arranged at the top increases; The tilt angle is equal to or greater than 0 degrees and equal to or less than 90 degrees, The plurality of fire extinguishing tubes are arranged such that as the inclination angle increases, the arrangement width from the top to the bottom of the plurality of fire extinguishing tubes decreases and the arrangement density within the arrangement width increases.

2. The arrangement density of the plurality of fire extinguishing tubes increases upward. The fire extinguishing system according to claim 1.

3. The fire extinguishing tube is arranged with its axis parallel to the horizontal direction. The fire extinguishing system according to claim 1 or 2.

4. Each of the fire extinguishing tubes is arranged in a direction of extending on both sides of the cable tray along the laying direction. The fire extinguishing system according to any one of claims 1 to 3.

5. A heat-resistant sheet is provided in the cable tray to cover the cables and the plurality of fire extinguishing tubes. The fire extinguishing system according to any one of claims 1 to 4.

6. A method for installing fire extinguishing equipment, in which a fire extinguishing tube is installed in a cable tray in which cables are laid, the fire extinguishing tube containing a pressurized fire extinguishing agent sealed in a tubular container, the tube melting the outer shell of the container when heated to release the fire extinguishing agent, setting an inclination angle, which is the angle formed between the laying direction of the cables and the horizontal direction; A step of arranging the plurality of fire extinguishing tubes within an arrangement width from the top to the bottom of the plurality of fire extinguishing tubes so that the arrangement density of the fire extinguishing tubes arranged at the top increases as the inclination angle increases; Equipped with The method for installing fire extinguishing equipment, wherein the inclination angle is greater than or equal to 0 degrees and less than or equal to 90 degrees.

7. installing a plurality of the fire extinguishing tubes in the cable tray based on the arrangement; A method for installing the fire extinguishing system according to claim 6.

8. and covering the cable tray on which the plurality of fire extinguishing tubes are installed with a heat-resistant sheet. A method for installing a fire extinguishing system according to claim 6 or 7.

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