Fire hydrant equipment, its installation method, and branch pipes

Abstract

To provide a fire hydrant facility in which, after a proximal end of a branch pipe is connected to a water supply pipe, the branch pipe can be retracted so as not to hinder construction work of the fire hydrant facility without damaging the branch pipe.SOLUTION: A fire hydrant facility comprises: a fire hydrant storage box in which a fire hydrant valve insertion hole through which a fire hydrant valve can be inserted is formed on a wall plate; a water supply pipe laid outside of the fire hydrant valve storage box; and a branch pipe connecting the fire hydrant valve disposed inside of the fire hydrant storage box with the water supply pipe. In the fire hydrant facility, the branch pipe has rigidity as a whole, a proximal end of the branch pipe is connected to the water supply pipe, and the fire hydrant valve is disposed in a distal end thereof. The branch pipe includes a bent part and a rotary joint which corresponds to the bent part and is disposed at an upstream side of the bent part. and is configured to be displaceable in a direction where the distal end of the branch pipe is separated from a storage box installation space part, by rotating the rotary joint.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fire hydrant system that is installed on the interior walls of buildings such as office buildings, apartment buildings, and department stores, and that is configured to discharge fire water from a water supply pipe through a fire hose by opening a fire hydrant valve in the event of a fire, as well as to an installation method for the system and a branch pipe. [Background technology]

[0002] Conventionally, there have been known fire hydrant storage boxes that store fire hoses, nozzles, hydrant valves, and the like used in firefighting activities in preparation for a fire, as described in Patent Documents 1 and 2. Such fire hydrant storage boxes are installed in a storage box installation space provided in an inner wall such as a passage wall of a building, and a fire hydrant system is constructed by inserting the tip of a branch pipe branching off from a water supply pipe that is installed vertically on the rear side of the inner wall into the fire hydrant storage box through a branch pipe insertion hole provided in the back plate of the fire hydrant storage box, connecting the tip to the inlet of the fire hydrant valve, and connecting the base end of the fire hose to the outlet of the fire hydrant valve.

[0003] In addition, a water supply pipe is arranged behind the fire hydrant storage box, and a rigid branch pipe branches off from this water supply pipe and is arranged horizontally.The tip of this branch pipe is pulled into the fire hydrant storage box, and a fire hydrant valve is attached to the tip of the branch pipe.

[0004] Patent Document 3 proposes a fire extinguishing system that includes a flexible pipe, a fire hydrant valve provided at one end of the flexible pipe, a flange-shaped mounting plate fixed near the fire hydrant valve, a joint portion provided at the other end of the flexible pipe, and a fire hydrant storage box in which a fire hydrant valve insertion hole through which the fire hydrant valve can be inserted and which has an opening area smaller than that of the mounting plate is formed in the rear box, wherein the fire hydrant valve is inserted into the fire hydrant valve insertion hole and the mounting plate is fixed to the rear box, and the joint portion is connected to a branch joint provided on a water supply pipe installed inside the wall of a building, and this fire extinguishing system uses a flexible pipe. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Utility Model Application Publication No. 3-78566 [Patent Document 2] Japanese Patent Application Laid-Open No. 2005-270494 [Patent Document 3] Japanese Patent Application Publication No. 2019-10255 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the fire extinguishing equipment of Patent Document 3, after a water pressure test to check for water leakage from the flexible pipe is conducted, the flexible pipe, with its base end connected to the water supply pipe, hangs down from above or to the side in the narrow space within the inner wall until the hydrant storage box is installed in the storage box installation space, and there is a problem that a worker or a work tool used by the worker may collide with the flexible pipe, which is filled with water and already under stress from the inside, and the flexible pipe may be damaged. Furthermore, because a heavy fire hydrant valve is installed at the tip, the flexible pipe is maintained in a bent state with stress applied to it for a long period of time, and there is a risk that the durability of the flexible pipe may be reduced.

[0007] Therefore, it is possible to consider bending the flexible pipe partway and retracting it so that it does not get in the way, but after closing the fire hydrant valve attached to the end of the flexible pipe, a water pressure test is performed by filling the vertical piping and the flexible pipe with water and applying a predetermined pressure.Since the flexible pipe is filled with water, the flexibility of the flexible pipe is reduced, making it difficult to bend the flexible pipe itself and retracting the flexible pipe so that it does not get in the way.

[0008] Furthermore, if the flexible tube is filled with water and its flexibility is reduced, and the flexible tube is forcibly bent, there is a risk that the flexible tube will be damaged, which may cause water leakage.

[0009] The present invention has been made in consideration of these problems, and its object is to provide a fire hydrant system, a branch pipe used therein, and a method for installing a fire hydrant system, which can be retracted without damaging the branch pipe and without interfering with the installation work of the fire hydrant system, after the base end of the branch pipe is connected to the water supply pipe and until the fire hydrant storage box is installed in the storage box installation space. [Means for solving the problem]

[0010] The fire hydrant equipment of the present invention includes: a fire hydrant storage box that is installed in a storage box installation space on an inner wall of a building and stores a fire hose therein, and has a fire hydrant valve insertion hole formed in a wall panel through which a fire hydrant valve can be inserted; a water supply pipe piped outside the fire hydrant storage box; A fire hydrant system including a fire hydrant valve disposed in the fire hydrant storage box and a branch pipe connecting the water supply pipe, The branch pipe has rigidity as a whole, a base end connected to the water supply pipe, and a tip end provided with the fire hydrant valve, The branch pipe has a bent portion and a rotary joint corresponding to the bent portion and arranged upstream of the bent portion, and is configured so that the tip of the branch pipe can be displaced in a direction away from the storage box installation space by rotating the rotary joint.

[0011] The branch pipe of the present invention is A fire hydrant storage box is installed in a storage box installation space on the inner wall of a building, stores a fire hose inside, and has a fire hydrant valve insertion hole formed in the wall panel through which a fire hydrant valve can be inserted, and a branch pipe connects the fire hydrant storage box to a water supply pipe piped outside the fire hydrant storage box, The branch pipe has rigidity as a whole, a base end connected to the water supply pipe, and a tip end provided with the fire hydrant valve, The branch pipe has a bent portion and a rotary joint corresponding to the bent portion and arranged upstream of the bent portion, and is configured so that the tip of the branch pipe can be displaced in a direction away from the storage box installation space by rotating the rotary joint. [Effects of the Invention]

[0012] According to the present invention, the fire hydrant system includes a bent portion and a rotary joint corresponding to the bent portion and disposed upstream of the bent portion, and the rotation of the rotary joint allows the tip of the branch pipe to be displaced away from the fire hydrant storage box. Therefore, between the water pressure test process and the hydrant valve installation process, the part of the branch pipe further forward than the rotary joint, including the hydrant valve, can be displaced upward or backward relative to the storage box installation space and retracted. This prevents the branch pipe from interfering with the installation work of the fire hydrant equipment, ensuring work space for workers and allowing the installation work to proceed smoothly. Furthermore, it is possible to generally prevent workers and their tools from colliding with the branch pipe or the hydrant valve disposed at the tip, thereby generally preventing the occurrence of unexpected events such as damage to the branch pipe or the hydrant valve.

[0013] Because the branch pipe is bent by rotating it from the rotary joint, unnecessary deformation stress is not applied to the branch pipe, which reduces the risk of water leakage without compromising the pressure resistance of the branch pipe and allows stable performance to be maintained over a long period of time.

[0014] In the above invention, the branch pipe has a plurality of bent portions and has rotary joints corresponding to at least two of these bent portions, and the outflow direction of the outlet of the bent portion corresponding to this rotary joint changes by rotating the rotary joint, and when the fire hydrant valve is configured to be displaceable in the vertical and / or horizontal directions by rotating the at least two rotary joints, it is possible to smoothly and reliably absorb the positional deviation of the fire hydrant storage box within the storage box installation space, and the fire hydrant valve arranged at the tip of the branch pipe can be easily arranged within the fire hydrant storage box.

[0015] Furthermore, by rotating the branch pipe at its rotary joint, any misalignment of the fire hydrant storage box within the storage box installation space can be absorbed. Therefore, even when water pressure is applied to the branch pipe after a water pressure test has been conducted, the branch pipe can be rotated smoothly without causing water leakage from the rotary joint, allowing for smooth installation work of the fire hydrant equipment and providing a fire hydrant equipment that is virtually free from unforeseen events such as water leakage from the branch pipe over a long period of time. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. [Figure 2] FIG. 2 is a side view showing the fire hydrant equipment. [Figure 3] FIG. 2 is a cross-sectional view showing a rotary joint. [Figure 4] FIG. 2 is a cross-sectional view showing a rotary joint. [Figure 5] FIG. [Figure 6] FIG. 10 is a schematic diagram showing a retracted state of the branch pipe. [Figure 7] FIG. 10 is a schematic front view showing the state in which the displacement of the fire hydrant storage box is absorbed. DETAILED DESCRIPTION OF THE INVENTION

[0017] 1 and 2, the fire hydrant system includes a fire hydrant storage box 1 installed on the interior wall W of a building, a fire hose 2 stored in the fire hydrant storage box 1, a nozzle 3 connected to the tip of the fire hose 2, a fire hydrant valve 4 disposed within the fire hydrant storage box 1, a water supply pipe (not shown) disposed outside (for example, behind or above) the fire hydrant storage box 1, and a branch pipe 6 connecting the water supply pipe and the fire hydrant valve 4. The base end of the fire hose 2 is connected to the outlet of the fire hydrant valve 4 via a connector as necessary.

[0018] A rectangular storage box installation space W1 capable of storing the fire hydrant storage box 1 is formed in the interior wall W of the building, and the fire hydrant storage box 1 is stored and installed from the front side in this storage box installation space W1. Furthermore, a water supply pipe is installed above or behind the space in the interior wall W where the storage box installation space W1 is provided.

[0019] The base end of a branch pipe 6 is connected and communicated with the water supply pipe, while a fire hydrant valve 4 is disposed and integrated at the tip of the branch pipe 6, and fire water supplied from the water supply pipe is supplied to the fire hydrant valve 4 through the branch pipe 6. The fire hydrant valve 4 is then housed and disposed inside the fire hydrant storage box 1 through a fire hydrant valve insertion hole 11a formed in the rear wall panel 11 of the fire hydrant storage box 1.

[0020] As shown in Fig. 2, the branch pipe 6 has a plurality of bent portions 61, and rotary joints 7, 7 are arranged to correspond to at least two of these bent portions 61, 61 (to form pairs with each of the bent portions 61, 61). The rotary joints 7 are arranged upstream of the bent portion 61 corresponding to the rotary joint 7 (upstream in the flow direction of the fire extinguishing water flowing through the bent portion 61). Rotation of the rotary joint 7 is configured to change the flow direction of the fire extinguishing water at the bent portion 61 corresponding to the rotary joint 7, i.e., at the outlet 611 of the bent portion 61 that is closest to the rotary joint 7 on the downstream side of the branch pipe 6. The flow direction of the fire extinguishing water at the tip of the branch pipe 6 is configured to be directed horizontally by combining the plurality of bent portions 61. In the present invention, the "horizontal direction" includes a direction perpendicular to the direction of gravity (referred to as the "perpendicular direction") and a direction within an intersecting angle of 10° in the vertical direction centered on this perpendicular direction.

[0021] In detail, the branch pipe 6 has a plurality of bent portions 61a to 61d (four bent portions 61a to 61d in FIG. 2) arranged at arbitrary intervals from the upstream side to the downstream side. The intervals between adjacent bent portions 61, 61 are adjusted as appropriate depending on the conditions of the construction site. The tip of the branch pipe 6 is configured to be oriented horizontally by combining the plurality of bent portions 61a to 61d, and the fire hydrant valve 4 is integrally disposed at the tip of the branch pipe 6 oriented horizontally.

[0022] figure 2 In the figure, the bent portion 61a and the rotary joint 7a, the bent portion 61b and the rotary joint 7b, the bent portion 61c and the rotary joint 7c, and the bent portion 61d and the rotary joint 7d are paired, respectively.

[0023] When the rotary joint 7a rotates, the outlet 611a of the bent portion 61a can be displaced on a circumference centered on the rotary joint 7a.

[0024] When the rotary joint 7b rotates, the outlet 611b of the bent portion 61b can be displaced on a circumference centered on the rotary joint 7b.

[0025] When the rotary joint 7c rotates, the outlet 611c of the bent portion 61c is configured to be displaceable on a circumference centered on the rotary joint 7c.

[0026] When the rotary joint 7d rotates, the outlet 611d of the bent portion 61d can be displaced on the circumference of a circle centered on the rotary joint 7d.

[0027] The rotary joint 7e does not have a mating bent portion, but by rotating the rotary joint 7e, the fire hydrant valve 4, which is integrally arranged at the tip of the branch pipe 6, can be rotated around the rotary joint 7e, making it possible to change the outflow direction of the outlet of the fire hydrant valve 4 within the fire hydrant storage box 1 and facilitating connection to the base end of the fire hose 2.

[0028] The rotary joints 7a to 7e are rotatable in all directions, that is, 360° rotation is possible. By rotating the rotary joints 7a to 7d in any combination, the branch pipe 6 is configured to be freely bendable at the rotary joints 7a to 7d.

[0029] Any known rotary joints may be used for the rotary joints 7a to 7d as long as they can change the outflow direction of the outflow ports 611 of the paired bent portions 61. For example, the rotary joint 7 has a first rotary joint portion 71 and a second rotary joint portion 72 rotatably supported by the first rotary joint portion 71 (see FIGS. 3 and 4).

[0030] The first rotary joint 71 is formed in a cylindrical shape and has in its center a flow path 71a that penetrates between both ends and through which fire-extinguishing water flows. The first rotary joint 71 has a support chamber 71b for rotatably supporting one end of the second rotary joint 72, and an annular step 71c is formed on the peripheral wall surface of the support chamber 71b at the center in the flow direction of the fire-extinguishing water. The first rotary joint 71 has a cylindrical first rotary joint main body 711 and a fixing member 712 that is threadably integrated with the other end of the first rotary joint main body. The fixing member 712 is threadably integrated with the opening of the other end of the first rotary joint main body 711 to form the support chamber 71b, and one end of the second rotary joint 72 is rotatably supported within this support chamber 71b.

[0031] The second rotary joint 72 is formed in a cylindrical shape and has a flow path 72a in its center that penetrates between both ends and through which fire-fighting water flows. An annular protrusion 72b is formed around the entire circumference of the outer circumferential surface of the second rotary joint 72. One half of the second rotary joint 72 is rotatably housed within the support chamber 71b of the first rotary joint 71, while the other half protrudes from the support chamber 71b of the first rotary joint 71. The protrusion 72b abuts against and is received by a step 71c of the support chamber 71b, and the second rotary joint 72 is supported rotatably relative to the first rotary joint 71. The rotary joint 7 is configured to be rotatable by rotating the second rotary joint 72 relative to the first rotary joint 71. A rolling element 70a or an annular ring element 70b is disposed between the opposing surface of the other side of the annular protrusion 72b of the second rotary joint portion 72 and the inner wall surface of the support chamber 71b of the first rotary joint portion 71, so that the second rotary joint portion 72 can rotate smoothly relative to the first rotary joint portion 71.

[0032] The inner or outer peripheral surface of one end of the first rotary joint portion 71 and the inner or outer peripheral surface of the other end of the second rotary joint portion 72 are formed with threaded portions (male or female threaded portions) 71d, 72c for threading and integrating piping components (e.g., elbow-type pipe joints, pipe components, etc.) that constitute the branch pipe 6.

[0033] The branch pipe 6 is constructed by connecting a plurality of rotary joints 7, 7... arranged at desired intervals using piping members, and the bent portion 6 is constructed by a piping member having a bent portion such as an elbow-type joint.

[0034] Specifically, the other end of the pipe member 51 (a straight pipe in FIG. 2) is threadedly integrated with the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7a, one end of the elbow-type pipe joint that constitutes the bent portion 61a is threadedly integrated with the threaded portion 72c of the second rotary joint portion 72 of the rotary joint 7a, and the other end of the elbow-type pipe joint is threadedly integrated with the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7b. The rotary joint 7a located upstream of the bent portion 61a is the rotary joint that corresponds to the bent portion 61a.

[0035] One end of a pipe member 52 having a bent portion 61b formed at the other end thereof is threadedly integrated with a threaded portion 72c of a second rotary joint portion 72 of the rotary joint 7b, and the other end of the pipe member 52 is threadedly integrated with a threaded portion 71d of a first rotary joint portion 71 of the rotary joint 7c. The rotary joint 7b located upstream of the bent portion 61b is the rotary joint corresponding to the bent portion 61b. The pipe member 52 may be formed by integrally connecting an elbow-type pipe joint to the other end of a straight pipe, or by bending the other end of a straight pipe to form a bent portion.

[0036] The other end of the tubular member 52 is threadedly integrated with the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7c, and one end of the tubular member 53, which has a bent portion 61c formed at one end, is threadedly integrated with the threaded portion 72c of the second rotary joint portion 72 of the rotary joint 7c. The rotary joint 7c located upstream of the bent portion 61c is the rotary joint corresponding to the bent portion 61c. The tubular member 53 may be configured in the same manner as the tubular member 52.

[0037] The other end of the pipe member 53 is threadedly integrated with the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7d, and one end of the elbow-type pipe joint that constitutes the bent portion 61d is threadedly integrated with the threaded portion 72c of the second rotary joint portion 72 of the rotary joint 7d. The rotary joint 7d located upstream of the bent portion 61d is the rotary joint that corresponds to the bent portion 61d.

[0038] The other end of the elbow-type pipe joint that constitutes the bent portion 61d is threadedly integrated with the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7e, and one end of a straight pipe is threadedly integrated with the threaded portion 72c of the second rotary joint portion 72 of the rotary joint 7e, and a fire hydrant valve 4 is integrally arranged at the other end of the straight pipe 54.

[0039] The rotary joint 7 and piping members that make up the branch pipe 6 are rigid, and are configured to be non-deformable except that the first rotary joint portion 71 and the second rotary joint portion 72 in the rotary joint 7 are freely rotatable relative to each other around their rotation axes.

[0040] As described above, the branch pipe 6 has a bent portion 61 and a rotary joint 7 corresponding to this bent portion 61, and by rotating the rotary joint 7, the horizontally extending tip of the branch pipe 6 and the fire hydrant valve 4 arranged integrally with this tip can be displaced upward or to the side, and moved away from the storage box installation space W1 in which the fire hydrant storage box is installed, and can be retracted.

[0041] The number of rotary joints 7 constituting the branch pipe 6 and the types and numbers of piping components are not limited to those shown in Figure 2, and may be changed as appropriate depending on the installation location of the fire hydrant equipment.

[0042] For example, as shown in Figures 5 and 6, a structure may be used in which the other end of a water supply pipe or a pipe member 55 connected to a water supply pipe is connected to the threaded portion 71d of the first rotary joint portion 71 of the rotary joint 7c in Figure 2. Although the branch pipe 6 shown in Figures 5 and 6 does not include a rotary joint 7e, a rotary joint 7e may be provided. Note that the same structural parts as those in the branch pipe 6 shown in Figure 2 are designated by the same reference numerals and their description will be omitted.

[0043] Next, a procedure for installing a fire hydrant system using a branch pipe 6 will be described. The base end of the branch pipe 6 is connected and communicated with a water supply pipe (not shown) installed within a building structure. Thereafter, a fire hydrant valve 4 is attached to the tip of the branch pipe 6 and disposed integrally (branch pipe connecting process). Note that after the fire hydrant valve 4 is disposed integrally with the tip of the branch pipe 6, the base end of the branch pipe 6 may be connected and communicated with a water supply pipe (not shown).

[0044] After that, the fire hydrant valve 4 arranged at the tip of the branch pipe 6 is closed, and a water pressure test is performed by filling the branch pipe 6 with water through the water supply pipe to check for any leaks in the branch pipe 6 (water pressure test process).

[0045] Next, the fire hydrant storage box 1 is placed in the storage box installation space W1 formed in the inner wall W of the building, but due to other construction processes of the building, it may take some time for the fire hydrant storage box 1 to be installed in the storage box installation space W1 after the completion of the above-mentioned water pressure test process.

[0046] In such a case, if the branch pipe 6 is arranged toward the storage box installation space W1, it may interfere with other construction processes, or the branch pipe 6 may be damaged if a worker or a work tool used by the worker collides with it.

[0047] Therefore, by rotating any rotary joint 7 in the branch pipe 6, the portion of the branch pipe 6 located on the tip side from the rotated rotary joint 7 can be rotated around the rotary joint 7, and all or part of the portion of the branch pipe 6 located on the tip side from the rotated rotary joint 7 can be retracted upward and / or backward relative to the storage box installation space W1.

[0048] Although the branch pipe 6 is filled with water, the branch pipe 6 has rigidity and is not deformed by the water pressure filling its interior. Even when the branch pipe 6 is filled with water, the rotary joint 7 can be rotated smoothly, and the branch pipe 6 can be bent from the desired part and easily removed from the storage box installation space W1.

[0049] For example, as shown in Figure 6, by rotating the rotary joint 7c on the upper side of the branch pipe 6, the portion of the branch pipe 6 located on the tip side from the rotary joint 7c can be displaced upward and retracted upward into the storage box installation space W1.

[0050] Furthermore, by rotating the rotary joint 7d below the branch pipe 6, the portion of the branch pipe 6 located on the tip side from the rotary joint 7d can be displaced in a direction perpendicular to the plane of the paper in Figure 6, thereby displacing the tip of the branch pipe 6 further upward.

[0051] Alternatively, instead of rotating the rotary joint 7c on the upper side of the branch pipe 6, the rotary joint 7d on the lower side of the branch pipe may be rotated, thereby displacing the portion of the branch pipe 6 located on the tip side from the rotary joint 7d horizontally and retracting it rearward relative to the storage box installation space W1.

[0052] In the branch pipe of Figure 2, the entire branch pipe 6 may be displaced upward by rotating the uppermost rotary joint 7a, or part of the branch pipe 6 may be retracted upward or backward by rotating rotary joint 7c and / or rotary joint 7d, as was done in the branch pipe 6 of Figures 5 and 6.

[0053] As described above, the branch pipe 6 can be easily bent by rotating the rotary joint 7 from any part of it, making it easy to secure a working space in a narrow space within the inner wall of a building, and allowing construction work to be carried out smoothly.

[0054] Furthermore, the branch pipe 6 has enough rigidity to not be deformed by its own weight or the weight of the fire hydrant valve integrally arranged at the tip, except for rotation at the rotary joint 7, so the heavy fire hydrant valve 4 can be stably maintained attached to the tip, and the state of being retracted from the storage box installation space W1 can be reliably maintained.

[0055] Then, after the hydrant storage box 1 is arranged in the storage box installation space W1, the branch pipe 6 that has been bent from any of the rotary joints 7 as described above is rotated from the rotary joint 7 to return it to its original state, and the tip of the branch pipe 6 with the hydrant valve 4 integrally arranged therewith is inserted into the hydrant valve insertion hole 11a of the hydrant storage box 1, thereby arranging the hydrant valve 4 in the hydrant storage box 1 (fire hydrant valve arrangement process) (see Figures 2 and 6).

[0056] On the other hand, as shown in Figure 7, the position of the fire hydrant storage box 1 arranged in the storage box installation space W1 may shift horizontally and / or vertically from the originally planned installation position, and as a result, the position of the fire hydrant valve insertion hole 11a formed in the wall panel of the fire hydrant storage box 1 may shift from the planned installation position L0 to the changed installation position L1.

[0057] In such a case, at least two bending structures each consisting of a bending portion and a rotary joint corresponding to the bending portion and arranged upstream are provided in the branch pipe 6, and the rotary joints constituting these bending structures are arranged so that their rotation axes are horizontal, thereby absorbing the positional deviation of the fire hydrant valve insertion hole 11a from the planned installation position L0 to the changed installation position L1.

[0058] Taking the branch pipe 6 shown in Figure 2 as an example, the branch pipe 6 has at least two bent structures each consisting of bent portions 61a, 61c and rotary joints 7a, 7c that correspond to the bent portions 61a, 61c and are arranged upstream, and the rotary joints 7a, 7c are arranged so that their rotation axes are horizontal.

[0059] Then, by rotating the rotary joint 7a of the branch pipe 6, the fire hydrant valve 4 disposed at the tip of the branch pipe 6 is moved horizontally (left and right in Figure 7). If only the rotary joint 7a of the branch pipe 6 was rotated, the fire hydrant valve 4 disposed at the tip of the branch pipe 6 would rotate around the rotary joint 7a and become tilted. Therefore, by rotating the rotary joint 7c of the branch pipe 6, the position of the fire hydrant valve 4 is adjusted to the correct position. In this way, by rotating the rotary joints 7a, 7c of the branch pipe 6, the branch pipe 6 can be bent from the desired portion, and the position of the fire hydrant valve 4 arranged at the tip of the branch pipe 6 can be moved. After absorbing the positional deviation from the planned installation position L0 of the fire hydrant valve insertion hole 11a to the changed installation position L1, the tip of the branch pipe 6 can be inserted into the fire hydrant valve insertion hole 11a, and the fire hydrant valve 4 can be arranged in the fire hydrant storage box 1 in the correct posture.

[0060] The base end of the fire hose 2 can then be connected to the outlet of the fire hydrant valve 4 in a watertight communication state via a connecting part as needed, thereby completing the installation of the fire hydrant equipment. [Explanation of symbols]

[0061] 1. Fire hydrant storage box 11a Fire hydrant valve insertion hole 2 fire hoses 4. Fire hydrant valve 51-55 Pipe members 6 Branch Pipe 61(61a-61d) Bent part 611(611a-611d) Outlet 7(7a-7e) Rotating joint 71 First rotary joint 72 Second rotary joint Planned location of L0 fire hydrant storage box Changed location of L1 fire hydrant storage box W Inner wall W1 Storage box installation space

Claims

1. a fire hydrant storage box that is installed in a storage box installation space on an inner wall of a building and stores a fire hose therein, and has a fire hydrant valve insertion hole formed in a wall panel through which a fire hydrant valve can be inserted; a water supply pipe piped outside the fire hydrant storage box; A fire hydrant system including a fire hydrant valve disposed in the fire hydrant storage box and a branch pipe connecting the water supply pipe, The branch pipe has rigidity as a whole, a base end connected to the water supply pipe, and a tip end provided with the fire hydrant valve, The branch pipe includes a plurality of piping members each having only one bent portion, and rotary joints disposed corresponding to the bent portions of the piping members and on the upstream side of the bent portions, and is configured such that, by rotation of the rotary joints, the tip ends of the branch pipes can be displaced in a direction away from the storage box installation space, Between adjacent rotary joints, one end of the piping member is connected to one rotary joint, and the other end of the piping member is connected to the other rotary joint, The piping member includes a straight pipe having a bent portion formed at an end thereof, a hydrant valve disposed at the tip of the branch pipe in the fire hydrant storage box, the piping member is disposed so that one end thereof is located closer to the fire hydrant storage box than the other end, and the tip of the branch pipe is configured to be oriented horizontally by combining bent portions of a plurality of piping members.

2. The fire hydrant equipment according to claim 1, characterized in that the branch pipe is configured so that the outflow direction of the outlet of the bent portion corresponding to the rotary joint changes when the rotary joint is rotated, and the fire hydrant valve can be displaced in the vertical direction and / or the horizontal direction when the at least two rotary joints are rotated.

3. The fire hydrant equipment according to claim 1 or 2, characterized in that by rotating the rotary joint, the tip portion of the branch pipe further distal than the rotated rotary joint and the fire hydrant valve can be displaced upward or rearward and retracted.

4. A fire hydrant storage box is installed in a storage box installation space on the inner wall of a building, stores a fire hose inside, and has a fire hydrant valve insertion hole formed in the wall panel through which a fire hydrant valve can be inserted, and a branch pipe connects the fire hydrant storage box to a water supply pipe piped outside the fire hydrant storage box, The branch pipe has rigidity as a whole, a base end connected to the water supply pipe, and a tip end provided with the fire hydrant valve, The branch pipe includes a plurality of piping members each having only one bent portion, and rotary joints disposed corresponding to the bent portions of the piping members and on the upstream side of the bent portions, and is configured such that, by rotation of the rotary joints, the tip ends of the branch pipes can be displaced in a direction away from the storage box installation space, Between adjacent rotary joints, one end of the piping member is connected to one rotary joint, and the other end of the piping member is connected to the other rotary joint, The piping member includes a straight pipe having a bent portion formed at an end thereof, A branch pipe characterized in that, when a fire hydrant valve disposed at the tip of the branch pipe is disposed in the fire hydrant storage box, the piping member is disposed so that one end thereof is located closer to the fire hydrant storage box than the other end, and the tip of the branch pipe is configured to be oriented horizontally by combining bent portions of a plurality of piping members.

5. The branch pipe according to claim 4, characterized in that the outflow direction of the outlet of the bent portion corresponding to the rotary joint changes with the rotation of the rotary joint, and the fire hydrant valve can be displaced in the vertical direction and / or the horizontal direction with the rotation of the at least two rotary joints.

6. a branch pipe connecting step of connecting a branch pipe to a water supply pipe installed outside the storage box installation space in which the fire hydrant storage box is installed, and integrally arranging a fire hydrant valve at the tip of the branch pipe; a water pressure testing step of performing a water pressure test on the branch pipe; a fire hydrant valve installation step of inserting the fire hydrant valve of the branch pipe into a fire hydrant valve insertion hole formed in a wall plate of a fire hydrant storage box installed in the storage box installation space portion, thereby installing the fire hydrant valve in the fire hydrant storage box, The branch pipe has rigidity as a whole, a base end connected to the water supply pipe, and a tip end provided with the fire hydrant valve, The branch pipe has a plurality of piping members each having only one bent portion, and rotary joints each corresponding to the bent portions of the piping members and disposed upstream of the bent portions, and between adjacent rotary joints, one end of the piping member is connected to one rotary joint and the other end of the piping member is connected to the other rotary joint, and between the water pressure test process and the fire hydrant valve installation process, the rotary joints are rotated to retract the tip ends of the branch pipes upward or backward from the storage box installation space, The piping member includes a straight pipe having a bent portion formed at an end thereof, a fire hydrant valve disposed at the tip of the branch pipe in the fire hydrant storage box, the piping member is disposed so that one end thereof is located closer to the fire hydrant storage box than the other end, and the tip of the branch pipe is configured to be oriented horizontally by combining bent portions of a plurality of piping members.

7. The branch pipe is configured such that the outflow direction of the outlet of the bent portion corresponding to the rotary joint changes with rotation of the rotary joint, and the fire hydrant valve can be displaced in the vertical direction and / or the horizontal direction with rotation of the at least two rotary joints, A fire hydrant installation method characterized in that, in the fire hydrant valve installation step, the branch pipe is rotated at the rotary joint to displace the fire hydrant valve installed at the tip of the branch pipe in the vertical and / or horizontal directions, thereby absorbing any misalignment of the fire hydrant valve insertion hole of the fire hydrant storage box installed in the storage box installation space and installing the fire hydrant valve in the fire hydrant storage box through the fire hydrant valve insertion hole.

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