Unwinding pipe structure of gas fire extinguishing equipment and method of using the unwinding pipe of gas fire extinguishing equipment

Abstract

To provide a wind-off piping structure for a gas-based fire extinguishing system capable of reducing generation of noise when fire-extinguishant gas passes a bellows part of a flexible joint while enjoying advantages of simplification of construction and time-shortening the flexible joint has by using the flexible joint having flexibility.SOLUTION: A flexible joint provided with a configuration that reduces peculiar noise generated when fire-extinguishant gas passes a bellows part is used for a piping joint 50 for a wind-off piping part of a wind-off piping part 5, and an injection head 4 provided with a muffling function is used for the injection head 4.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to a roll-out pipe structure of a gas fire extinguishing facility that uses a fire extinguishing agent gas such as a halide gas or an inert gas, and a method of using the roll-out pipe of the gas fire extinguishing facility.

Background Art

[0002] Conventionally, the roll-out pipe portion 5 of a gas fire extinguishing facility (see, for example, Patent Document 1) that uses a fire extinguishing agent gas such as a halide gas or an inert gas has been structured such that, for example, as shown in FIG. 20, in order to accurately attach the injection head to the hole position of the ceiling board, a structure that combines a plurality of steel pipes and joints such as elbows to adjust the position and requires multiple screwing operations has been adopted. However, aligning the roll-out pipes during construction requires skilled techniques and time to cut out pipes of accurate dimensions, which has been a burden on the constructor.

[0003] By the way, in order to solve this problem, it is conceivable to apply a flexible joint (see, for example, Patent Document 2) having flexibility used for the roll-out pipe of a water fire extinguishing facility to the roll-out pipe. That is, by using a flexible joint for the roll-out pipe, the screwing operation with a plurality of steel pipes can be completed in one operation, and it can be expected to lead to simplification of construction and shortening of time.

[0004] However, from experiments conducted by the applicant of this application, when a flexible joint is used for the roll-out pipe of a gas fire extinguishing facility, it has been found that when the fire extinguishing agent gas passes through the bellows part of the flexible joint, a peculiar noise is generated and is discharged from the injection head through the flexible joint together with the fire extinguishing agent gas. It has also been found that the noise (vibration) discharged from the injection head may have an adverse effect on precision equipment such as HDDs present in the fire extinguishing target section (for example, a server room). In addition, this noise can be expected to have a certain reduction effect by applying an injection head with a noise reduction function (see, for example, Patent Documents 3 to 5), which was previously proposed by the applicant of the present application, to the injection head. However, it was also found that depending on the structure of the outlet pipe, it cannot be completely prevented.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0006] In view of the problems of the outlet pipe of the conventional gas fire extinguishing equipment described above, the present invention uses a flexible joint having flexibility, and while enjoying the advantages of simplifying construction and shortening time possessed by the flexible joint, it can reduce the generation of noise when the fire extinguishing agent gas passes through the bellows of the flexible joint. The present invention aims to provide an outlet pipe structure of a gas fire extinguishing equipment and a method of using the outlet pipe of a gas fire extinguishing equipment. of the outlet pipe.

Means for Solving the Problems

[0007] In order to achieve the above object, the roll-out pipe structure of the gas fire extinguishing equipment of the present invention is characterized in that in the roll-out pipe structure of the gas fire extinguishing equipment, a flexible joint having a structure for reducing the peculiar noise generated when the fire extinguishing agent gas passes through the bellows is used in the roll-out pipe portion, and an injection head having a sound-absorbing function is used for the injection head.

[0008] In this case, the diameter of the bellows of the flexible joint can be made equal to or larger than the diameter of the gas inlet side mounting portion and / or the gas outlet side mounting portion so as to reduce the flow velocity of the fire extinguishing agent gas passing through the bellows.

[0009] Also, the diameter of the bellows of the flexible joint can be made 20A to 50A.

[0010] Also, the angle α formed between the axial direction of the gas inlet side mounting portion and the axial direction of the gas outlet side mounting portion of the flexible joint can be attached so as to be 0° to 90°. Here, as a construction error, the “angle α” allows an allowable range of about ±5°.

[0011] Also, when the axial direction of the gas inlet side mounting portion and the axial direction of the gas outlet side mounting portion are attached so as to be parallel, with respect to the total length L of the flexible joint, centered on the axis of the gas inlet side mounting portion, within a range of an axial displacement perpendicular to the axis of 0.3L, and the end face of the gas outlet side mounting portion is attached within a range of 0.7L to 1.0L from the end face of the gas inlet side mounting portion. Here, “parallel” allows an allowable range of about ±5° as a construction error.

[0012] In addition, in the case where the axial direction of the gas inlet side attachment portion and the axial direction of the gas outlet side attachment portion are attached so as to be perpendicular to each other, with respect to the total length L of the flexible joint, within a range of 0.5L of displacement perpendicular to the axis from the axis of the gas inlet side attachment portion or the axis of the gas outlet side attachment portion, and the end face of the gas outlet side attachment portion or the gas inlet side attachment portion is attached within a range of 0.5L to 0.9L from the end face of the gas inlet side attachment portion or the gas outlet side attachment portion. Here, the "right angle" allows an allowable range of about ±5° as a construction error.

[0013] In addition, the flexible joint can have a steel pipe portion or a reducer, and the ratio of the length of the bellows portion to the total length L of the flexible joint can be made smaller.

[0014] In addition, a gas fire extinguishing facility can be configured by including at least one or a plurality of the above-described winding-out pipe structures of the gas fire extinguishing facility.

[0015] In addition, to achieve the same purpose, a method of using the winding-out pipe of the gas fire extinguishing facility of the present invention is a method of using the winding-out pipe of the gas fire extinguishing facility, wherein a flexible joint is used in the winding-out pipe portion in a method of reducing specific noise when the fire extinguishing agent gas passes through the bellows portion, and a jet head having a sound absorption function is used for the jet head.

[0016] In this case, it is characterized in that the flow rate of the fire extinguishing agent gas flowing into the gas inlet side attachment portion of the flexible joint is restricted to a predetermined amount or less.

[0017] In addition, the set maximum flow rate of the fire extinguishing agent gas flowing into the gas inlet side attachment portion of the flexible joint can be restricted to 70% or less of the set maximum flow rate when the flexible joint is not used.

Effects of the Invention

[0018] According to the roll-out pipe structure and its usage method of the gas fire extinguishing equipment of the present invention, by using a flexible joint with flexibility, while enjoying the advantages of simplified construction and shortened time that the flexible joint has, it is possible to reduce the generation of noise when the fire extinguishing gas passes through the bellows part of the flexible joint, and prevent the noise (vibration) emitted from the injection head from adversely affecting precision equipment such as HDDs existing in the fire extinguishing target section (for example, the server room).

Brief Description of the Drawings

[0019]

Figure 1

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Figure 20

Embodiments for Carrying Out the Invention

[0020] Hereinafter, embodiments of the unwinding pipe structure of the gas fire extinguishing equipment of the present invention and the method of using the unwinding pipe of the gas fire extinguishing equipment will be described based on the drawings.

[0021] Fig. 1 schematically shows the basic structure of a gas fire extinguishing equipment 1 to which the unwinding pipe structure of the gas fire extinguishing equipment of the present invention and the method of using the unwinding pipe of the gas fire extinguishing equipment are applied. This gas fire extinguishing equipment 1 has a fire extinguishing pipe 3 connected to a storage container 2, an injection head 4 for injecting a fire extinguishing agent gas, and an unwinding pipe section 5 provided between the fire extinguishing pipe 3 and the injection head 4. Here, for each component of the gas fire extinguishing equipment 1, devices and members that have been conventionally widely used can be used except for the unwinding pipe section 5. In addition, various gases that can be used for fire extinguishing can be used as the fire extinguishing agent gas. For example, halide gas and inert gas (inert gas) are examples of the fire extinguishing agent gas. As the inert gas (inert gas), nitrogen gas, argon gas, etc. can be used. In particular, nitrogen gas has few adverse effects on the human body, so it can be preferably used as the fire extinguishing agent gas.

[0022] In the gas fire extinguishing equipment 1, when a fire breaks out in the protected area, the container valve of the storage container 2 is manually or automatically opened, and the fire extinguishing agent gas stored in the storage container 2 is discharged from the storage container 2 through the fire extinguishing pipe 3 and from the injection head 4 into the protected area. As a result, the fire in the protected area is extinguished by, for example, reducing the oxygen concentration in the protected area.

[0023] By the way, in the construction of the gas fire extinguishing equipment 1, the storage container 2, the fire extinguishing pipe 3, the unwinding pipe section 5, and the injection head 4 may be constructed by different persons (construction contractors) at different times. According to this embodiment, for example, as shown in FIG. 2, since the bellows pipe 51 of the pipe joint 50 for the payout pipe section 5 constituting the payout pipe section 5 has flexibility and can be bent (in other words, deformed), the payout pipe section 5 can be easily installed by unskilled workers according to the site conditions where the payout pipe section 5 is installed (such as the arrangement state of building materials and other objects, the size of the construction site such as the ceiling space and the wall space). Therefore, for example, even if the storage container 2 and the fire extinguishing pipe 3 are installed, it is possible to suppress the occurrence of a situation where the installation of the injection head 4 is delayed due to reasons such as inability to secure the schedule of skilled workers for installing the payout pipe section 5. That is, even when it is difficult to secure the schedule of skilled workers after the storage container 2 and the fire extinguishing pipe 3 are installed, the payout pipe section 5 can be installed by unskilled workers and the process can proceed to the phase of installing the injection head 4.

[0024] The injection head 4 is a device for injecting (that is, discharging) the fire extinguishing agent gas. The injection head 4 is connected to the fire extinguishing pipe 3 via the payout pipe section 5. The injection head 4 is, for example, of the open type and is always open. The injection head 4 can be installed at various locations within the protected area, such as on the ceiling or wall, where the fire extinguishing agent gas can be discharged. For the injection head 4, an injection head installed on the ceiling surface, a lateral blowing injection head installed on the wall, etc. can be used. In this embodiment, for the injection head 4, an injection head having a sound absorption function as disclosed in Patent Documents 3 to 5, preferably an injection head provided with a sound absorption member made of a porous material, can be used. As an example of this injection head 4, as shown in FIG. 3, it has a plurality of orifices 42, and at its outlet, a metal A cylindrical porous sound absorption member 41 configured by laminating a porous material 41a with a larger pore diameter in the central part and a metal porous material 41b with a smaller pore diameter in the outer peripheral part to eliminate the turbulence of the air flow can be mentioned.

[0025] The payout pipe section 5 is provided between the fire extinguishing pipe 3 and the injection head 4. The pipe joint 50 for the unwinding pipe section is a member of the unwinding pipe section 5. The unwinding pipe section 5 may be composed of only one pipe joint 50 for the unwinding pipe section, may have members other than the pipe joint 50 for the unwinding pipe section, or may have a plurality of pipe joints 50 for the unwinding pipe section. As an example of the members other than the pipe joint 50 for the unwinding pipe section that the unwinding pipe section 5 has, at least one of other pipes, other pipe joints for the unwinding pipe section having the same configuration as the pipe joint 50 for the unwinding pipe section according to the embodiment, elbows, sockets, and tees can be mentioned. When the unwinding pipe section 5 has these members, the attachable area of the unwinding pipe section 5 can be expanded.

[0026] Here, for the pipe joint 50 for the unwinding pipe section, the one described in the patent application (Japanese Patent Application No. 2020-145364) by the applicants of the present application (in this specification, it may be referred to as a "flexible joint") can be preferably used. FIG. 4 is a schematic side view (before assembly) of the pipe joint for the unwinding pipe section according to the present embodiment, and FIG. 5 is a schematic side view (after assembly) of the pipe joint for the unwinding pipe section according to the embodiment. In FIGS. 4 and 5, for easy understanding, a part of each member is drawn transparently as appropriate so that the members covered by those members can be seen. As shown in FIGS. 4 and 5, the pipe joint 50 for the unwinding pipe section according to the present embodiment is a pipe joint for the unwinding pipe section used in the gas fire extinguishing equipment 1, and includes a bellows pipe 51 having a pipe wall in which ridges and valleys are repeated, and a reinforcing member 52 wound around the bellows pipe 51. The bellows pipe 51 has flexibility, the valleys of the bellows pipe 51 are a continuous groove extending in a spiral shape, and the reinforcing member 52 is a pipe joint for the unwinding pipe section wound around the bellows pipe 51 along the valleys of the bellows pipe 51. The pipe joint 50 for the unwinding pipe section (bellows pipe 51) has flexibility and can be bent into various shapes.

[0027] The pipe joint 50 for the unwinding pipe section according to the present embodiment may include, in addition to the bellows pipe 51 and the reinforcing member 52, an elongation suppression member 53 that covers the outer surface of the bellows pipe 51 and suppresses the elongation of the bellows pipe 51, a first jig fixing ring 54a provided on one end side of the bellows pipe 51, a second jig fixing ring 54b provided on the other end side of the bellows pipe 51, a cylindrical hollow member 55 connected to one end of the bellows pipe 51, a nut 56 rotatably attached to the hollow member 55, a first attachment member 57a screwed to the nut 56, and a second attachment member 57b joined to the second jig fixing ring 54b. This will be described in detail below.

[0028] The bellows pipe 51 is a hollow member. The bellows pipe 51 may be called a tube. The fire extinguishing agent gas supplied from the fire extinguishing pipe 3 passes through the inside (hollow portion) of the bellows pipe 51. The bellows pipe 51 can be manufactured, for example, by bending (or rounding, winding) a metal flat plate into a tube shape (cylindrical shape) to form a cylindrical pipe, and using a device such as a die to make the pipe wall of the manufactured cylindrical pipe have a shape in which ridges and valleys are repeated. As the material of the bellows pipe 51, for example, stainless steel, more specifically, alloy steel containing chromium and nickel can be used. When using the alloy steel, the chromium content in the total weight of the bellows pipe 51 is, for example, 18% or more.

[0029] The pipe wall of the bellows pipe 51 has a shape in which ridges and valleys are repeated. These ridges and valleys may be called "folds" or convex and concave portions. Although the bellows pipe 51 may elongate due to the pressure of the fire extinguishing agent gas passing through the bellows pipe 51, in the present embodiment the elongation of the bellows pipe 51 is suppressed by the elongation suppression member 53 described later.

[0030] The bellows pipe 51 is flexible. Thereby, at the construction site of the gas fire extinguishing equipment 1, in response to obstacles between the fire extinguishing pipe 3 and the injection head 4, the distance between the fire extinguishing pipe 3 and the injection head 4, etc., while bending the pipe joint 50 for the payout pipe section, the pipe joint 50 for the payout pipe section, and thus the payout pipe section 5 can be constructed. For this reason, even an unskilled worker can easily connect and couple the fire extinguishing pipe 3 and the injection head 4 with the payout pipe section 5 according to the situation of the site where the payout pipe section 5 is constructed. That is, it is not necessary to measure the dimensions of the site for each situation of the site, cut out the pipe according to the measured dimensions, form a thread groove in the cut-out pipe, etc. The pipe joint 50 for the payout pipe section can be bent according to the situation of the site, and the payout pipe section 5 can be constructed. The obstacles and distances may vary from site to site where the gas fire extinguishing equipment 1 is constructed, but since the bellows pipe 51 is flexible, even an unskilled worker can connect and couple the injection head 4 and the fire extinguishing pipe 3 according to various situations of the site.

[0031] FIG. 6 is an enlarged view showing the bellows pipe 51 and the reinforcing member 52. FIG 6 In, the arrow is shown for explaining the state of extending spirally. FIG 6 As shown in, the troughs of the bellows pipe 51 are a continuous groove extending spirally. The reinforcing member 52 described later is wound around the bellows pipe 51 along the troughs of the bellows pipe 51. When a plurality of troughs are independent on the pipe wall of the bellows pipe 51, it is necessary to provide a plurality of independent reinforcing members 52 provided in each trough and fix each reinforcing member 52 to each trough of the bellows pipe 51. However, according to the present embodiment, by inserting the reinforcing member 52 into a continuous groove extending spirally and compressing the bellows pipe 51, the reinforcing member 52 can be easily sandwiched in the trough (that is, in the concave portion that becomes the trough), and the reinforcing member 52 can be fixed in close contact with the trough.

[0032] The wall thickness T1 of the bellows tube 51 is preferably 0.5 mm or less, more preferably 0.35 mm or less, so that the flexibility of the bellows tube 51 is not impaired. On the other hand, the wall thickness T1 of the bellows tube 51 is preferably 0.2 mm or more, more preferably 0.25 mm or more, in order to give the bellows tube 51 a pressure resistance. Generally, when satisfying the pressure resistance, the wall thickness T1 of the bellows tube 51 is increased, but within the above numerical range (even if the upper limit value is 0.5 mm), there is a possibility that the bellows tube 51 may not satisfy the pressure resistance required for gas fire extinguishing. However, if the wall thickness T1 of the bellows tube 51 is made larger than the upper limit value (0.5 mm) of the above numerical range, the flexibility of the bellows tube 51 may be impaired. Therefore, in the present embodiment, by providing the reinforcing member 52 at the trough portion of the bellows tube 51, the flexibility and pressure resistance of the bellows tube 51 are made compatible.

[0033] The reinforcing member 52 is a member wound around the bellows tube 51 to reinforce the pressure resistance of the bellows tube 51, and is provided at the trough portion of the bellows tube 51. By providing such a reinforcing member 52, it is possible to prevent a loss of flexibility due to the disturbance of the bellows tube 51 (the shape of the peaks and troughs (the shape of the folds) of the bellows tube 51 being deformed due to elongation or the like) caused by the pressure increase during the passage of the fire extinguishing agent gas, and to improve the pressure resistance. As described above, in order to give the bellows tube 51 flexibility, it is effective to keep the wall thickness T1 of the bellows tube 51 at a level where the flexibility of the bellows tube 51 is not impaired. However, if this is done, the bellows tube 51 cannot be given sufficient pressure resistance. Generally, in the case of gas fire extinguishing, the pressure in the pipe is higher than in the case of water fire extinguishing or foam fire extinguishing. Therefore, it is necessary to give the bellows tube 51 a greater pressure resistance than in the case of water fire extinguishing or foam fire extinguishing. Therefore, in the present embodiment, by winding the reinforcing member 52 around the bellows tube 51, the bellows tube 51 is given appropriate flexibility while being given sufficient pressure resistance. The maximum operating pressure of the bellows tube 51 is preferably, for example, 2 MPa or more and 10.8 MPa or less, more preferably more than 3.8 MPa and 10.8 MPa or less, in a state where the reinforcing member 52 is wound.

[0034] The reinforcing member 52 is preferably sandwiched between the troughs of the bellows tube 51. That is, it is sandwiched and held between the inner walls of the troughs (concave portions). The sandwiching by the troughs can be realized, for example, by compressing the bellows tube 51 after providing the reinforcing member 52 in the troughs (that is, compressing the bellows tube 51 so that the length in the longitudinal direction of the bellows tube 51 becomes shorter). When the bellows tube 51 is compressed, the width P of the troughs of the bellows tube 51 becomes substantially equal to the width of the reinforcing member 52. In this way, since the reinforcing member 52 is in close contact with the troughs of the bellows tube 51, it becomes possible to install the reinforcing member 52 at a predetermined position (for example, it becomes possible to arrange the reinforcing member 52 so as not to protrude more than necessary from the troughs of the bellows tube 51). Therefore, it is possible to suppress the substantial outer diameter of the bellows tube 51 (that is, the outer diameter of the bellows tube 51 specified including the wire diameter of the reinforcing member 52, considering the wound reinforcing member 52 as a part of the bellows tube 51) from expanding. In other words, by winding the reinforcing member 52, the outer diameter of the bellows tube 51 itself does not expand, but it is possible to suppress the bellows tube 51 from taking a shape as if it swells substantially in the circumferential direction due to the wire diameter of the reinforcing member 52. Also, it is possible to suppress the deformation of the bellows tube 51 due to the pressure when the fire extinguishing agent gas passes through the inside of the bellows tube 51 for the take-out piping section joint 50 (specifically, inside the bellows tube 51).

[0035] As described above, when the valleys of the bellows tube 51 are independent, it is necessary to provide a plurality of independent reinforcing members 52 for each valley and fix each of them to the respective valleys of the bellows tube 51. However, according to the present embodiment, one (1) reinforcing member 52 can be inserted into a continuous groove formed by a plurality of valleys being continuous in a spiral shape, and the bellows tube 51 can be fixed to the valleys by compressing the bellows tube 51. If two (2) or more reinforcing members 52 are inserted into a continuous groove formed by a plurality of valleys being continuous, the pressure resistance strength can be further improved. However, if the number (quantity) of the reinforcing members 52 is increased more than necessary, the flexibility of the bellows tube 51 will be impaired. Therefore, the number of the reinforcing members 52 wound around the bellows tube 51 is preferably a number (quantity) that does not impair the flexibility of the bellows tube 51. In the present embodiment, one reinforcing member 52 is wound around the bellows tube 51.

[0036] It is preferable to use a wire or a metal wire having a circular cross-section for the reinforcing member 52, and particularly preferably a wire or a metal wire made of a material having a strength and corrosion resistance equal to or higher than that of the bellows tube 51. When the bellows tube 51 is made of stainless steel, for example, the wire or the metal wire can also be made of stainless steel.

[0037] As described above, since a linear member such as one (1) wire or a metal wire is used for one (1) reinforcing member 52, the reinforcing member 52 can be called a "reinforcing wire".

[0038] The elongation restraining member 53 is a member that covers the outer surface of the bellows tube 51 and restrains the elongation of the bellows tube 51. The elongation restraining member 53 may be called a blade or the like. When internal pressure is applied, the bellows tube 51 extends in the length direction and has a property of trying to return to a straight pipe. If the shapes of the peaks and valleys (folds) of the bellows tube 51 are disturbed, the original flexibility of the bellows tube 51 will be impaired. The elongation restraining member 53 is, for example, knitted into a cylindrical shape and covers the outer periphery of the bellows tube 51 so as to be in close contact with the bellows tube 51. The elongation restraining member 53 is fixed (e.g., firmly fixed) at both ends of the bellows tube 51 by welding, caulking, crimping, or a combination of one or more of these methods. That is, by fixing one end of the elongation restraining member 53 and one end of the bellows tube 51, and the other end of the elongation restraining member 53 and the other end of the bellows tube 51 by the above methods, the elongation of the bellows tube 51 can be restrained. The elongation restraining member 53 can be produced, for example, by knitting a wire rod, strip material, or ordinary steel wire made of stainless steel.

[0039] The first jig fixing ring 54a and the second jig fixing ring 54b are parts where a jig (a jig for attaching the pipe joint 50 for the pay-out pipe section to building materials or the like) is fixed. That is, by fixing a jig to the first jig fixing ring 54a or the second jig fixing ring 54b and fixing the fixed jig to building materials or the like at the construction site of the pipe joint 50 for the pay-out pipe section, the pipe joint 50 for the pay-out pipe section can be fixed at the construction site. Since the first jig fixing ring 54a and the second jig fixing ring 54b are provided so as to hold one end or the other end of the elongation restraining member 53 (blade), they may be called blade holding rings. The first jig fixing ring 54a is provided on one end side (the side of the fire extinguishing pipe 3) of the bellows tube 51. The second jig fixing ring 54b is provided on the other end side (the side of the injection head 4) of the bellows tube 51. The first jig fixing ring 54a and the second jig fixing ring 54b are hollow members. The bellows tube 51 and the elongation restraining member 53 covering its outer surface are inserted into the hollow portion.

[0040] The first jig fixing ring 54a and the second jig fixing ring 54b can be fixed to the outer surface of the elongation suppressing member 53 by, for example, welding, caulking, crimping, or a combination of one or more of these methods. The outer shapes of the first jig fixing ring 54a and the second jig fixing ring 54b are, for example, cylindrical shapes or polygonal prism shapes, but are not particularly limited.

[0041] Due to the recoil (radiation reaction force) when the extinguishing agent gas is released during a fire, the bellows tube 51 violently shakes, and the problem occurs that the position of the injection head 4 becomes unstable. In order to suppress this shaking, a jig is required to firmly fix the bellows tube 51 to building materials or the like at the construction site. The reaction force when the extinguishing gas is released is much larger than that of general water-based fire extinguishing equipment, and the fixing jig also becomes large, and it is necessary to fix it with a dedicated metal fitting. Therefore, assuming the use of various jigs, both the first jig fixing ring 54a and the second jig fixing ring 54b are preferably longer compared to those used in the case of water fire extinguishing or foam fire extinguishing. Specifically, it is preferably 2 times or more and 10 times or less the length in the case of water fire extinguishing or foam fire extinguishing. More specifically, the lengths of the first jig fixing ring 54a and the second jig fixing ring 54b are both preferably 50 mm or more and 200 mm or less.

[0042] The hollow member 55 is a cylindrical member. The hollow member 55 is fixed to the end of the bellows tube 51 by a method such as welding or adhesion. The boundary between the hollow member 55 and the bellows tube 51 may or may not be covered by the first jig fixing ring 54a or the second jig fixing ring 54b.

[0043] A hollow member 55 is connected (specific example of connection: joining by welding or the like) to one end of the bellows tube 51, and the nut 56 is inserted into the hollow member 55. The hollow member 55 may be called a sleeve or the like. The hollow member 55 has a convex portion X, and the nut 56 is movable in the length direction of the hollow member 55 at D between the first jig fixing ring 54a and the convex portion X. That is, the nut 56 is at D between the first jig fixing ring 54a and the convex portion X, as shown in the figure 5It can be moved in the left - right direction. Thus, in this embodiment, instead of joining (such as welding) the first attachment member 57a (the attachment member on the side of the fire - fighting pipe 3) to the bellows pipe 51, a nut 56 is provided between the bellows pipe 51 and the first attachment member 57a.

[0044] The nut 56 is rotatably attached to the hollow member 55. Thereby, when attaching the first attachment member 57a to the fire - fighting pipe 3 (or a member connected to the fire - fighting pipe 3 such as an elbow, socket, tee, etc. hereinafter referred to as "the fire - fighting pipe 3 or a member connected to the fire - fighting pipe 3"), without rotating the entire pipe joint 50 for the pay - out pipe section, by only rotating the nut 56, the first attachment member 57a can be connected or linked to the pipe joint 50 for the pay - out pipe section (bellows pipe 51).

[0045] The nut 56 is preferably attached to the hollow member 55 so as to be not only rotatable but also tiltable (that is, rotatable and tiltable). Specifically, it is preferable that a gap Q (play) is provided between the opening of the nut 56 and the outer surface of the hollow member 55 so that the nut 56 can be tilted slightly. In this way, even when the fire - fighting pipe 3 or the like is tilted, the first attachment member 57a can be attached to the fire - fighting pipe 3 or the like according to the tilt (angle) of the fire - fighting pipe 3 or the like, and the nut 56 can be attached to the first attachment member 57a according to the tilt (angle) of the first attachment member 57a. When the nut 56 can be tilted slightly, even when the fire - fighting pipe 3 or the like is slightly tilted, after attaching the first attachment member 57a to the fire - fighting pipe 3 or the like according to the tilt (angle) of the fire - fighting pipe 3 or the like, without tilting the entire pipe joint 50 for the pay - out pipe section (especially the bellows pipe 51), the nut 56 can be tilted to attach the first attachment member 57a to the nut 56.

[0046] Inside the nut 56, for example, a thread groove is formed. This thread groove is screwed with the thread groove provided on the outer surface of the first attachment member 57a. In this embodiment, the nut 56 and the hollow member 55 are provided only on the fire extinguishing pipe 3 side, but the nut 56 and the hollow member 55 can also be provided on the injection head 4 side. In this case, the nut 56 and the hollow member 55 on the fire extinguishing pipe 3 side described above are referred to as the first nut and the first hollow member, and the nut and the hollow member on the injection head 4 side are referred to as the second nut and the second hollow member. The second hollow member is connected (specific example of connection: joining by welding or the like) to the other end of the bellows pipe. The second nut and the second hollow member have the same configuration and function as the nut 56 and the hollow member 55 on the fire extinguishing pipe 3 side described above.

[0047] For the nut 56, it is preferable to use, for example, a cap nut.

[0048] The first attachment member 57a (the attachment member on the fire extinguishing pipe 3 side) is a member for attaching the winding-out pipe section joint 50 to the fire extinguishing pipe 3 or the like. The second attachment member 57b (the attachment member on the injection head 4 side) is a member for attaching the winding-out pipe section joint 50 to the injection head 4 (or a member connected to the injection head 4, such as an elbow, socket, tee, etc. Hereinafter, the injection head 4 or a member connected to the injection head 4 is referred to as "the injection head 4 or the like"). As an example of the attachment method, screwing, fitting, or a combination thereof can be mentioned. When attaching by screwing, for example, a thread groove is provided on the inner surface of the first attachment member 57a or the second attachment member 57b.

[0049] When the pipe joint 50 for the payout pipe section has the nut 56 (first nut) described above on the side of the fire extinguishing pipe 3, the first attachment member 57a is attached to the first nut by screwing. When the pipe joint 50 for the payout pipe section has a second nut having the same configuration and function as the nut 56 described above on the side of the injection head 4, the second attachment member 57b is attached to the second nut by screwing. When the pipe joint 50 for the payout pipe section has only the nut 56 (first nut) described above on the side of the fire extinguishing pipe 3 and does not have a (second nut) having the same configuration and function as the nut 56 described above on the side of the injection head 4, the second attachment member 57b is joined to the bellows pipe 51 by welding or the like.

[0050] The distance between the end of the first attachment member 57a and the end of the second attachment member 57b, that is, the overall length L of the pipe joint (flexible joint) 50 for the payout pipe section is not particularly limited, but is preferably 2000 mm or less. In this way, when the pipe joint 50 for the payout pipe section according to the embodiment is used as a horizontal pipe, support for the pipe joint 50 for the payout pipe section becomes unnecessary.

[0051] The first attachment member 57a may be called an adapter. Also, the second attachment member 57b may be called a nipple when it is joined to the bellows pipe 51 by welding or the like, and when it is attached to the second nut by screwing, it may be called an adapter in the same way as the first attachment member 57a. When the second attachment member 57b functions as a nipple, it is a member joined to the bellows pipe 51 by welding or the like and is connected to the injection head or the like by screw connection. When the second attachment member 57b and the bellows pipe 51 are joined by welding or the like, when connecting the second attachment member 57b and the injection head 4 or the like, the bellows pipe 51 will be rotated. When screwed to the second nut, it may be called an adapter, like the first attachment member 57a. When the second attachment member 57b functions as a nipple, it is a member joined to the bellows pipe 51 by welding or the like and is connected to the injection head or the like by screw connection. When the second attachment member 57b and the bellows pipe 51 are joined by welding or the like, when connecting the second attachment member 57b and the injection head 4 or the like, the bellows pipe 51 will be rotated.

[0052] According to the pipe joint 50 for the payout pipe section described above, since the bellows pipe 51 has flexibility, even an unskilled worker can construct the payout pipe section 5 according to the situation at the construction site of the gas fire extinguishing equipment 1. Further, since at least one reinforcing member 52 (the number of which does not impair the flexibility of the bellows pipe 51) is wound around the bellows pipe 51 along the trough portion of the bellows pipe 51, it is possible to ensure the pressure resistance strength of the bellows pipe 51 while giving flexibility to the bellows pipe 51. Therefore, it is possible to provide a pipe joint 50 for a payout pipe section that can be easily constructed while ensuring the pressure resistance strength, and a gas fire extinguishing equipment 1 using the same.

[0053] In the present embodiment, since the nut 56 and the first attachment member 57a are connected by a parallel screw, connection, removal, etc. can be easily performed. Further, the nut 56 is loosely fitted in the hollow member 55 in advance and can rotate freely and move back and forth. The sleeve of the hollow member 55 is joined to the bellows pipe 51 by welding or the like. When connecting to the fire extinguishing pipe 3 or the like, only the first attachment member 57a can be removed from the nut 56 and only the first attachment member 57a can be connected to the fire extinguishing pipe 3 or the like. When connecting the first attachment member 57a and the bellows pipe 51, the nut 56 integrated with the bellows pipe 51 is applied to the first attachment member 57a connected to the fire extinguishing pipe 3 or the like, and the connection can be made by only rotating the nut 56. Different from the case of connecting the second attachment member 57b to the injection head 4 or the like, since it is not necessary to rotate the bellows pipe 51, there is an advantage that the work can be performed easily.

[0054] In the conventional coiled-out piping used in the gas fire extinguishing equipment 1, in order to accurately attach the injection head 4 to the hole position of the ceiling board, the positions are adjusted by combining a plurality of steel pipes and joints such as elbows, and multiple screwing operations are required. However, aligning the coiled-out piping during construction requires skilled techniques and takes time to cut out pipes with accurate dimensions, which places a burden on the constructor. Also, earthquake-resistant ceiling work is required so that the business can be quickly restored even in the event of unexpected situations such as earthquakes. As described in this embodiment, by having the coiled-out piping with the bellows pipe 51 having flexibility, the screwing operation with multiple steel pipes is completed in one screwing operation, leading to simplified construction and shortened time. Generally, for gas fire extinguishing with a significantly higher operating pressure compared to water fire extinguishing, a large pressure resistance is required, so it was necessary to use a material with poor flexibility. However, according to this embodiment, by providing the reinforcing member 52 at the trough portion of the bellows pipe 51 having flexibility, a coiled-out piping for gas fire extinguishing equipment that achieves both pressure resistance and flexibility can be provided. Also, according to the coiled-out piping section 5 for gas fire extinguishing equipment according to this embodiment provided with the bellows pipe 51 having flexibility, the phase shift generated during the occurrence of vibrations such as earthquakes can be absorbed between the fire extinguishing piping 3 fixed to the partition and the injection head 4 fixed to the ceiling base portion. Therefore, the earthquake resistance of the ceiling can be improved.

[0055] By the way, when a flexible joint is used for the pipe joint 50 for the coiled-out piping section of the coiled-out piping section 5 of the gas fire extinguishing equipment 1, it has been found that a peculiar noise is generated when the extinguishing agent gas passes through the bellows part (bellows pipe 51 having flexibility) of the flexible joint, and it may be discharged from the injection head through the flexible joint together with the extinguishing agent gas. Hereinafter, specific examples of the coiled-out piping structure of the gas fire extinguishing equipment and the usage method of the coiled-out piping of the gas fire extinguishing equipment that can reduce the generation of noise when the extinguishing agent gas passes through the pipe joint 50 for the coiled-out piping section composed of the flexible joint will be described.

[0056] An example of a gas fire extinguishing facility to which a roll-out pipe structure of a gas fire extinguishing facility for reducing the generation of noise when the fire extinguishing agent gas passes through a pipe joint 50 for a roll-out pipe section composed of a flexible joint is applied is shown in FIGS. 7 to 8. This gas fire extinguishing facility 1 is based on using, in the roll-out pipe structure of the gas fire extinguishing facility 1, a flexible joint having a structure for reducing the specific noise generated when the bellows section of the flexible joint of the pipe joint 50 for the roll-out pipe section 5 of the roll-out pipe section passes through the fire extinguishing agent gas, and using, for the injection head 4, an injection head 4 having a sound-absorbing function, preferably, an injection head 4 provided with a sound-absorbing member 41 made of a porous material.

[0057] Specifically, as shown in FIGS. 9 to 11 and FIG. 19 described later, the diameter (inner diameter of the valley portion) of the bellows section of the bellows pipe 51 of the flexible joint constituting the pipe joint 50 for the roll-out pipe section 5 of the roll-out pipe section 5 is made equal to or larger than the diameter (inner diameter) of the first attachment member 57a as the gas inlet side attachment portion and / or the second attachment member 57b as the gas outlet side attachment portion, and the flow rate of the fire extinguishing agent gas passing through the bellows section can be reduced. More specifically, as shown in FIG. 9, the shape of the first attachment member 57a as the gas inlet side attachment portion connected to the branch pipe (not shown) of the fire extinguishing pipe 3 is configured to have a throttle portion and expand toward the bellows pipe 51, or the shape of the second attachment member 57b as the gas outlet side attachment portion connected to the injection head 4 is configured to be reduced toward the injection head 4 and have a throttle portion. In addition, as shown in FIG. 10, the shape of the first attachment member 57a as the gas inlet side attachment portion connected to the branch pipe (not shown) of the fire extinguishing pipe 3 is configured to have a throttle portion and gradually expand toward the bellows pipe 51, or the shape of the second attachment member 57b as the gas outlet side attachment portion connected to the injection head 4 is configured to be gradually reduced toward the injection head 4 and have a throttle portion. Also, as the gas inlet side attachment part, the shape of the bushing 58a that connects the branch pipe 31 of the fire extinguishing pipe 3 and the first attachment member 57a can be configured to have a throttle part, and it can be configured to connect to the first attachment member 57a through a socket 58b that expands toward the bellows pipe 51. In this case, it is preferable that the diameter (inner diameter of the valley part) of the bellows part of the bellows pipe 51 of the flexible joint that constitutes the pipe joint 50 for the unwinding pipe part 5 of the unwinding pipe part 5 is 20A to 50A (nominal diameter). Thereby, in addition to the effect of reducing peculiar noise, there is an effect of reducing the pressure loss when the fire extinguishing agent gas is ejected at a high flow rate.

[0058] Table 1 shows the experimental results of examining the relationship between the diameter (inner diameter of the valley part) of the bellows part of the bellows pipe 51 of the flexible joint that constitutes the pipe joint 50 for the unwinding pipe part 5 of the unwinding pipe part 5 (nominal diameter: 20A, 32A), the diameter (inner diameter) of the second attachment member 57b as the gas outlet side attachment part (nominal diameter: 20A), and the sound pressure. From this experimental result, it was confirmed that by making the diameter (inner diameter of the valley part) of the bellows part of the bellows pipe 51 of the flexible joint that constitutes the pipe joint 50 for the unwinding pipe part 5 of the unwinding pipe part 5 equal to or larger than the diameter (inner diameter) of the second attachment member 57b as the gas outlet side attachment part, the effect of reducing noise can be achieved.

[0059]

Table 1

[0060] In addition to the above-described embodiment, as a structure for reducing peculiar noise, as shown in FIG. 12, the angle α formed between the axial direction of the first attachment member 57a as the gas inlet side attachment part of the flexible joint that constitutes the pipe joint 50 for the unwinding pipe part 5 of the unwinding pipe part 5 and the axial direction of the second attachment member 57b as the gas outlet side attachment part is 0° to 90°. It can be realized by being attached so as to be. Here, as a construction error, the "angle α" allows an allowable range of about ±5°. The installation form of the pipe joint 50 for the unwinding pipe section 5 of the unwinding pipe section is not limited to the installation form shown in FIG. 12, and various installation forms such as those shown in FIG. 13 can be adopted according to the positional relationship between the fire fighting pipe 3 (branch pipe 31) fixed to the partition and the injection head 4 fixed to the ceiling base part.

[0061] Table 2 shows the experimental results of examining the relationship between the angle α (90°, 180°) formed by the axial direction of the first mounting member 57a as the gas inlet side mounting part of the flexible joint constituting the pipe joint 50 for the unwinding pipe section 5 of the unwinding pipe section 5 and the axial direction of the second mounting member 57b as the gas outlet side mounting part, and the sound pressure. According to this experimental result, it was confirmed that by setting the angle α formed by the axial direction of the first mounting member 57a as the gas inlet side mounting part of the flexible joint constituting the pipe joint 50 for the unwinding pipe section 5 of the unwinding pipe section 5 and the axial direction of the second mounting member 57b as the gas outlet side mounting part to 90° or less, the effect of reducing noise can be achieved.

[0062]

Table 2

[0063] In this case, as shown in FIGS. 14 to 15, when the axial direction of the first mounting member 57a as the gas inlet side mounting part of the flexible joint constituting the pipe joint 50 for the unwinding pipe section 5 of the unwinding pipe section 5 and the axial direction of the second mounting member 57b as the gas outlet side mounting part are mounted so as to be parallel, with respect to the total length L of the flexible joint, it is centered on the axis of the gas inlet side mounting part and within the range of an axial displacement perpendicular to the axis of 0.3L, and it is preferable that the end face of the gas outlet side mounting part is mounted within the range of 0.7L to 1.0L from the end face of the gas inlet side mounting part. Here, for "parallel", as a construction error, an allowable range of about ±5° is set.

[0064] Furthermore, as shown in FIGS. 16 to 17, the axial direction of the first attachment member 57a as the gas inlet side attachment portion of the flexible joint constituting the pipe joint 50 for the unwinding pipe portion 5 of the unwinding pipe portion 5 and the axial direction of the second attachment member 57b as the gas outlet side attachment portion are perpendicular to each other. In the case of such attachment, with respect to the total length L of the flexible joint, it is within the range of an axial displacement perpendicular to the axis of 0.5L from the axis of the gas inlet side attachment portion or the axis of the gas outlet side attachment portion, and the end face of the gas outlet side attachment portion or the gas inlet side attachment portion is preferably attached within the range of 0.5L to 0.9L from the end face of the gas inlet side attachment portion or the gas outlet side attachment portion. Here, "right angle" allows a tolerance range of about ±5° as a construction error.

[0065] Also, as a structure for reducing specific noise, as shown in FIGS. 18 to 19, the flexible joint constituting the pipe joint 50 for the unwinding pipe portion 5 of the unwinding pipe portion 5 has a steel pipe portion 59a or a reducer 59b made of a straight pipe, and the ratio of the length of the bellows portion of the bellows pipe 51 to the total length L of the flexible joint is made small, specifically, 70% or less, preferably 60% or less, more preferably 50% or less (in the embodiment shown in FIG. 18, 50%, and in the embodiment shown in FIG. 19, 43%). This can be achieved by setting it in this way.

[0066] And the unwinding pipe structure of each of the above gas fire extinguishing facilities can constitute the gas fire extinguishing facility 1 by including at least one or a plurality thereof.

[0067] The method of using the unwinding pipe of the gas fire extinguishing facility for reducing the generation of noise when the extinguishing agent gas passes through the pipe joint 50 for the unwinding pipe portion consisting of a flexible joint is the method of using the unwinding pipe of the gas fire extinguishing facility 1, and when the bellows portion of the pipe joint 50 for the unwinding pipe portion 5 of the unwinding pipe portion passes through the extinguishing agent gas, the flexible joint is used in a method for reducing specific noise, and the injection head 4 is basically used with an injection head 4 having a sound absorption function, preferably an injection head 4 provided with a sound absorption member 41 made of a porous material.

[0068] The method of use for reducing this specific noise can be specifically realized by restricting the flow rate of the fire extinguishing agent gas flowing into the attachment part on the gas inlet side of the flexible joint to a predetermined amount or less.

[0069] In this case, it is preferable to restrict the set maximum flow rate of the fire extinguishing agent gas flowing into the attachment part on the gas inlet side of the flexible joint to 70% or less of the set maximum flow rate when not using the flexible joint.

[0070] According to the roll-out pipe structure of this gas fire extinguishing equipment and its method of use, by using a flexible joint with flexibility, while enjoying the advantages of simplified construction and shortened time that the flexible joint has, it is possible to reduce the generation of noise when the fire extinguishing agent gas passes through the bellows part of the flexible joint, and prevent the noise (vibration) emitted from the injection head from adversely affecting precision equipment such as HDDs existing in the fire protection target area (for example, the server room).

[0071] As described above, the roll-out pipe structure of the gas fire extinguishing equipment of the present invention and the method of use of the roll-out pipe of the gas fire extinguishing equipment have been described based on its embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and the configuration can be appropriately changed within the scope not departing from the gist thereof, such as appropriately combining the configurations described in each embodiment.

Industrial Applicability

[0072] The roll-out pipe structure of the gas fire extinguishing equipment of the present invention and the method of use of the roll-out pipe of the gas fire extinguishing equipment can widely use a flexible joint with flexibility to enjoy the advantages of simplified construction and shortened time that the flexible joint has, and can reduce the generation of noise when the fire extinguishing agent gas passes through the bellows part of the flexible joint. Therefore, it can be widely used in applications of gas fire extinguishing equipment that uses fire extinguishing agent gases such as halide gases and inert gases (inert gases), and the application target is not limited to newly installed gas fire extinguishing equipment, but also includes the modification of existing gas fire extinguishing equipment. It can also be applied to repairs and the like.

Explanation of Signs

[0073] 1 Gas fire extinguishing equipment 2 Storage container 3 Fire extinguishing pipe 31 Branch pipe 4 Spray head 5 Unwinding pipe section 50 Pipe joint for unwinding pipe section (flexible joint) 51 Bellows pipe (bellows) 52 Reinforcing member 53 Elongation suppression member 54a First jig fixing ring 54b Second jig fixing ring 55 Hollow member 56 Nut 57a First mounting member 57b Second mounting member 58a Bushing 58b Socket 59a Steel pipe section 59b Reducer X Protrusion of the hollow member L Total length of the pipe joint for the unwinding pipe section (flexible joint) (distance between the ends of the first mounting member and the second mounting member) P Distance between the valleys of the bellows pipe (bellows) T1 Wall thickness of the bellows pipe (bellows)

Claims

1. In the unwinding pipe structure of a gas fire extinguishing facility, a flexible joint equipped with a metal bellows section is used in the unwinding pipe section, and as a structure for reducing the specific noise generated when the fire extinguishing agent gas passes through the bellows section, the angle α formed between the axial direction of the gas inlet side attachment section and the axial direction of the gas outlet side attachment section of the flexible joint is attached so as to be 0° to 90°, and an injection head equipped with a noise reduction function is used for the injection head. The unwinding pipe structure of the gas fire extinguishing facility is characterized by this.

2. The unwinding pipe structure of the gas fire extinguishing facility according to Claim 1, wherein the diameter of the bellows section of the flexible joint is made equal to or larger than the diameter of the gas inlet side attachment section and / or the gas outlet side attachment section, and the flow rate of the fire extinguishing agent gas passing through the bellows section is reduced.

3. The unwinding pipe structure of the gas fire extinguishing facility according to Claim 2, wherein the diameter of the bellows section of the flexible joint is 20A to 50A.

4. When the axial direction of the gas inlet side attachment section and the axial direction of the gas outlet side attachment section are attached so as to be parallel, with respect to the total length L of the flexible joint, centered on the axis of the gas inlet side attachment section, within the range of an axial displacement perpendicular to the axis of 0.3L, and the end face of the gas outlet side attachment section is attached within the range of 0.7L to 1.0L from the end face of the gas inlet side attachment section. The unwinding pipe structure of the gas fire extinguishing facility according to Claim 1 is characterized by this.

5. When the axial direction of the gas inlet side attachment section and the axial direction of the gas outlet side attachment section are attached so as to be perpendicular, with respect to the total length L of the flexible joint, within the range of an axial displacement perpendicular to the axis of 0.5L from the axis of the gas inlet side attachment section or the axis of the gas outlet side attachment section, and the end face of the gas outlet side attachment section or the gas inlet side attachment section is attached within the range of 0.5L to 0.9L from the end face of the gas inlet side attachment section or the gas outlet side attachment section. The unwinding pipe structure of the gas fire extinguishing facility according to Claim 1 is characterized by this.

6. The unwinding pipe structure of the gas fire extinguishing facility according to Claim 1, wherein the flexible joint has a steel pipe section or a reducer, and a flexible joint is used in which the ratio of the length of the bellows section to the total length L of the flexible joint is 70% or less. ​

7. The unwinding pipe structure of the gas fire extinguishing equipment according to claim 6, characterized in that the flexible joint has a jig fixing ring with a length of 50 mm to 200 mm that covers both ends of the bellows.

8. A gas fire extinguishing equipment comprising at least one or a plurality of the unwinding pipe structures of the gas fire extinguishing equipment according to any one of claims 1 to 7.

9. A method of using an unwinding pipe of a gas fire extinguishing equipment, which uses a flexible joint provided with a metal bellows in the unwinding pipe part, and as a method of reducing the peculiar noise when the fire extinguishing agent gas passes through the bellows, the angle α formed between the axial direction of the gas inlet side attachment part and the axial direction of the gas outlet side attachment part of the flexible joint is set to 0° to 90° for use, and a jet head equipped with a noise reduction function is used for the jet head. A method of using an unwinding pipe of a gas fire extinguishing equipment, characterized by this.

10. The method of using an unwinding pipe of a gas fire extinguishing equipment according to claim 9, characterized in that the flow rate of the fire extinguishing agent gas flowing into the gas inlet side attachment part of the flexible joint is limited to a predetermined amount or less.

11. The set maximum flow rate of the fire extinguishing agent gas flowing into the gas inlet side attachment part of the flexible joint is limited to 70% or less of the set maximum flow rate when the flexible joint is not used. The method of using an unwinding pipe of a gas fire extinguishing equipment according to claim 10, characterized by this.

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