JP2012075610A - Fire hydrant valve unit and fire hydrant apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate the piping portion of a fire hydrant apparatus and to easily arrange the separated piping portion in a water supply main pipe portion.SOLUTION: This fire hydrant valve unit comprises: a joint part to be joined to a branch pipe from the water supply main pipe; a main valve part where an opening/closing control valve element is arranged in piping leading to the joint part; a pressure regulation part having an automatic pressure regulating valve on the secondary side of the main valve part and having a drain valve protruded downward from the bottom of the body part of the automatic pressure regulating valve; and a piping joint part which is arranged in piping continuous with the secondary chamber of the automatic pressure regulating valve and is to be joined to piping which is connected to a fire extinguishing hose of a fire hydrant body, wherein the joint part, the main valve part, the pressure regulation part, and the piping joint part are integrated.

Description

  The present invention relates to a fire hydrant device, and more particularly to a fire hydrant device for a tunnel installed on an inspection road in a road tunnel and a fire hydrant valve unit used therefor.

  Conventional fire hydrant devices are often installed on an inspection road formed on a side surface position of a road surface in a tunnel in a road tunnel, and are branched from a water distribution main disposed horizontally under the inspection road, A fire hydrant device is connected via a branch pipe (see Patent Document 1).

  The fire hydrant device installed in this way performs a piping operation for connecting the branch pipe from the water distribution main, simultaneously with the installation operation for installing the fire hydrant device in the box opening portion formed on the tunnel wall surface.

JP 2001-571 A

  The above-described piping work requires connection work for cutting and positioning of the steel pipe at the site, and is very troublesome to perform in the installation space provided in the inspection path. Therefore, there is a demand for a fire hydrant device that can be installed by simpler work. This invention aims to isolate | separate the piping part of a fire hydrant apparatus, and to install easily in a water distribution main part.

  A fire hydrant valve unit according to the present invention includes a coupling portion coupled to a branch pipe from a water distribution main, a main valve portion in which a valve body for opening and closing control is disposed in a pipe following the coupling portion, and the main valve portion An automatic pressure regulating valve is disposed on the secondary side of the automatic pressure regulating valve, and a pressure regulating unit including a drain valve protruding downward from the bottom of the main body of the automatic pressure regulating valve, and a pipe continuous to the secondary chamber of the automatic pressure regulating valve are provided. , A pipe coupling part coupled to a pipe coupled to a fire hose of the fire hydrant body, and characterized in that the coupling part, the original valve part, the pressure regulating part and the pipe coupling part are integrated. It is.

  The fire hydrant valve unit is also arranged so that the piping from the coupling part through the main valve part is in the horizontal direction, and the longitudinal direction of the automatic pressure regulating valve is oriented in the direction orthogonal to the horizontal direction. In addition, a pipe continuing to the secondary chamber of the automatic pressure regulating valve protrudes upward from the same surface.

  In the fire hydrant valve unit, the valve body of the main valve portion is a ball valve, and the interlocking pulley interlocked with the ball valve protrudes from the ball valve portion in a direction perpendicular to the pipe from the coupling portion in the horizontal direction. Are arranged.

  Further, the fire hydrant valve unit has a shape in which an automatic pressure regulating valve constituting the pressure regulating unit projects a pressure setting unit including a spring inside the pressure setting unit from the main body unit, and the pressure setting unit is arranged in a horizontal direction from the main body unit. It protrudes in a direction perpendicular to the pipe from the coupling portion.

  The fire hydrant apparatus uses any of the above-mentioned fire hydrant valve units.

  Further, the fire hydrant device has a fire hydrant valve unit installed in the vicinity of a water main, a fire hydrant body is installed in a desired protection target area, and the fire hydrant valve unit and the fire hydrant body are connected by piping.

  According to this invention, the fire hydrant valve unit includes a coupling portion coupled to the branch pipe from the water distribution main, a main valve portion in which a valve body for opening and closing control is disposed in a pipe following the coupling portion, An automatic pressure regulating valve is arranged on the secondary side of the valve portion, and a pressure regulating portion having a drain valve protruding downward from the bottom of the main body of the automatic pressure regulating valve, and a pipe continuous to the secondary chamber of the automatic pressure regulating valve And a pipe coupling portion coupled to a pipe coupled to the fire hose of the fire hydrant main body, and since the coupling portion, the main valve portion, the pressure regulating portion and the pipe coupling portion are integrated, they are separated. The piping part can be handled integrally, and it is only necessary to connect to the branch pipe of the water distribution main as a unit, and the construction is simple.

  Moreover, it can be made compact and can be reduced in size by arranging each part in combination with respect to the same horizontal surface.

It is a partial cross section figure of the road tunnel in which the fire hydrant apparatus using this invention was installed. It is a front view of a fire hydrant apparatus. It is the top view and front view which show a fire hydrant valve unit. It is explanatory drawing which shows the opening / closing mechanism of a fire hydrant valve.

Hereinafter, an embodiment of a fire hydrant device using the present invention will be described.
FIG. 1 is a partial cross-sectional view of a road tunnel 1 and shows a state in which a fire hydrant device 2 is installed in a side wall recess 11 of the tunnel 1 called boxing. FIG. 2 is a front view of the fire hydrant device 2, and its internal configuration is indicated by a dotted line. FIG. 3 is a plan view and a front view showing the internal configuration of the fire hydrant valve unit 5. FIG. 4 is an explanatory diagram relating to the opening / closing mechanism of the fire hydrant valve.

  The fire hydrant device 2 is branched into a branch pipe 41 from a water distribution main pipe 4 embedded in an inspection path 13 formed on the side of the road surface 12 in the tunnel 1, and is connected to the fire hydrant valve unit 5 via a pipe joint 42. Further, the pipe is connected to the inside of the fire hydrant body 7 from the fire hydrant valve unit 5 through a connection hose 6 as a flexible pipe member.

  In addition to the hose, a so-called flexible pipe can be used for the flexible piping.

  The installation of the fire hydrant apparatus 2 is such that an installation space 14 is formed in a portion where the branch pipe 41 from the water distribution main pipe 4 is provided continuously to the side wall recess 11, and the fire hydrant valve unit is provided in the space 14. 5 and the connecting hose 6 are installed, and the fire hydrant body 7 is placed on the floor surface in the side wall recess 11.

  The fire hydrant body 7 includes a box 71 having a front surface open and a front panel 72 covering the front surface, and a fire hose 74 having a fire extinguishing nozzle 73 at the tip, A hose bucket 75 that houses the fire-extinguishing hose 74 in an internally wound manner is provided. The box 71 is fixed to a base frame 76 fixed to the floor surface of the side wall recess 11 by bolting or the like.

  The fire hydrant body 7 is connected to a fire hose 74 and has a joint member 65 to which the connection hose 6 is connected. One end of the fire hose 74 is configured as a joint on the receiving side for fire fighting equipment. A joint portion 67 is provided. Since both ends of the connecting hose 6 are constructed as joints on the insertion side for the same fire fighting equipment, the connection to the joint member 65 can be easily performed. Further, the joint member 65 is supported by a support portion formed in the box 71, and the joint member 65 is provided with a maintenance valve 68, which is sufficient without passing through the fire hose 74 during a water discharge test. It is possible to check the supply of proper fire extinguishing water. The maintenance valve 68 may not be provided.

  The front panel 72 is provided with two openings provided with doors, and each opening is provided with a forward-type fire hydrant door 77 and a side-opening fire extinguisher door 78 that fall forward. The front panel 72 is of a left and right divided type, and is bolted at a portion corresponding to a fixing portion of the box 71 at eight places on both the upper, lower, left and right sides.

  The fire hydrant door 77 is a door that rotates to the front panel 72 with a hinge connected to the lower side of the front panel 72. When the fire hydrant door 77 is opened, the handle 79 on the left and right sides of the door is pulled toward the front, When the coupling is performed by the magnetic force maintaining the closed state, it pivots in the forward tilt direction to open the opening. This fire hydrant door 77 has only a function as a door, and is lightweight and simple.

  When the fire hydrant door 77 is opened, the nozzle 73 and the opening / closing lever 83 are exposed from the opening, and the user opens the opening / closing lever 83 to hold the nozzle 73 and pull out the fire hose 74 while the fire is occurring. The water can be discharged from the nozzle 73 and fire extinguishing can be performed.

  The fire extinguisher door 78 is formed with a rotating shaft on the left side and opened sideways. The fire extinguisher door 78 is a magnet type like the fire hydrant door 77 and can be opened by pulling the right handle 80 toward the front. Installed. Above the fire extinguisher door 78, an electrical device mounting portion is configured, and electrical devices such as an indicator lamp 81 and a transmitter 82 are mounted. Such a fire extinguisher part may be constituted separately and is not related to the use of the fire hydrant part.

  The fire hydrant valve unit 5 has a piping system as shown in FIG. 3, and is arranged on the secondary side of the fire hydrant valve 52 as a main valve part which is a ball-type on-off valve, and has a predetermined pressure. An automatic pressure regulating valve 53 for supplying fire-extinguishing water, and an automatic drain valve 58 that is disposed on the secondary side of the fire hydrant valve 52 and discharges unpressurized fire-extinguishing water that is not shown in detail but is not shown in detail. A flange portion 54 as a joint portion coupled to the pipe 41 and a joint portion 55 as a pipe joint portion configured as a joint on the receiving side for a fire fighting device to which the connection hose 6 is connected are integrated. .

  The pipe following the flange portion 54 is formed with a body in which a ball valve (not shown) is built in the middle, and the rod interlocking with the ball valve is pulled out in the direction perpendicular to the pipe on the same horizontal plane as the pipe. Further, the box 56 containing the interlocking pulley 57 is arranged so as to face the surface in the vertical direction. This ball valve constitutes a fire hydrant valve 52 as a main valve.

  The tip of the pipe is connected to the main body 53a of the automatic pressure regulating valve 53, and the main body 53a is arranged so that its longitudinal direction is in a direction perpendicular to the pipe on the same horizontal plane as the pipe. Although the main body 53a is not shown in detail, a primary chamber is formed inside and a secondary chamber is formed in the outer peripheral portion, and the piping communicates with a primary chamber (not shown). Between the primary chamber and the secondary chamber, the pressure setting portion 53b of the automatic pressure regulating valve 53 using an adjustment spring for adjusting the degree of opening and closing of the valve body protrudes in the direction perpendicular to the piping on the same horizontal plane as the piping, The automatic pressure regulating valve 53 is arranged so as to lie on the drawing. At this time, the pressure setting portion 53b protrudes to the opposite side so as not to hit the box 56 of the fire hydrant valve 52, so that the vertical direction (height direction) can be made thin and the area in plan view is reduced.

  Although not shown in detail from the main body 53a of the automatic pressure regulating valve 53 downward, an automatic drain valve 58 is arranged. The automatic drain valve 58 has a function of draining non-pressurized fire extinguishing water that is not discharged and closing it with the pressure of the fire extinguishing water and the like when discharging to prevent wasteful drainage. . By disposing the automatic drain valve 58 as in the present embodiment, most of the remaining water including the connection hose 6 in the piping system on the secondary side of the fire hydrant valve 52 is drained. can do. The automatic pressure regulating valve 53 (main body 53a, pressure setting unit 53b) and the automatic drain valve 58 constitute a pressure regulating unit 59.

  A pipe communicating with the secondary chamber is started up from the main body 53a of the automatic pressure regulating valve 53, and is a joint part 55 in which the receiving part of the connecting hose 6 is formed, and the pipe of the fire hydrant valve unit 5 The system can be connected to the fire hose 74 on the fire hydrant body 7 side via the connection hose 6. The height of the joint portion 55 is set to be equal to or lower than the position corresponding to the height of the flange portion 54, and the height of the fire hydrant valve unit 5 is not increased.

  Thus, the space required for the fire hydrant valve unit 5 is the width that the automatic pressure regulating valve 53 fits from the flange portion 54 through the fire hydrant valve 52, and the width of the pressure setting portion 53 b of the automatic pressure regulating valve 53 from the box 56 of the fire hydrant valve 52. And the height at which the flange portion 54 larger than the box 56 of the fire hydrant valve 52 is accommodated.

  The valve body of the fire hydrant valve 52 is interlocked with an interlocking pulley 57 disposed in the box 56 and is opened and closed by operating an opening / closing lever 83 provided on the back side of the fire hydrant door 77 on the fire hydrant body 7 side. As shown in FIG. 4, the opening / closing mechanism of the fire hydrant valve 52 by the opening / closing lever 83 is such that the opening / closing lever 83 is coupled to the opposing pulley 84, is coaxial with the center of rotation of the opposing pulley 84, and the opening / closing lever 83 is moved back and forth. It is designed to rotate. By pulling the opening / closing lever 83, the opposing pulley 84 rotates simultaneously. A wire 61 is hung on the opposed pulley 84 and the wire 61 is engaged and fixed to the opposed pulley 84 at one point. On the other hand, the wire 61 is hung on the interlocking pulley 57 of the fire hydrant valve 52 through the tube 62 fixed at both ends, and this wire 61 is stretched between the interlocking pulley 57 and the opposing pulley 84. The interlocking pulley 57 is also engaged and fixed at one point with the wire 61, and the interlocking pulley 57 is rotated by the same amount as the movement of the wire 61. As the interlocking pulley 57 rotates, the coaxially interlocking valve element opens the fire hydrant valve 52. Therefore, by opening the fire hydrant door 77 and pulling the opening / closing lever 83 forward, the inside of the fire hydrant valve unit 5 is opened. The fire hydrant valve 52 can be opened.

  The wire 61 is passed through the tube 62 and is passed from the fire hydrant main body 7 to the fire hydrant valve unit 5 in the same manner as the connecting hose 6. The tube 62 is prepared with a sufficient length, but in order to stretch the wire 61 from the interlocking pulley 57 to the opposing pulley 84, it is determined by the relationship between the length of the wire 61 and the tube 62. May be installed at a predetermined position.

  The installation work of the fire hydrant device 2 having such a configuration will be described below. In the tunnel 1, the water distribution main pipe 4 and the branch pipe 41 in the inspection path 13 are installed in advance, leading to the wall surface recess 11. An installation space 14 is also formed in advance.

  First, the base frame 76 is fixed to the floor surface of the wall surface recess 11 with an anchor, the fire hydrant main body 7 is placed thereon, and the main body 7 is fixed to the base frame 76 by bolting.

  Further, the flange portion 54 of the fire hydrant valve unit 5 is connected to the pipe joint 42 of the branch pipe 41 branched from the water distribution main pipe 4. At this time, since the fire hydrant valve unit 5 is downsized, even if the installation space 14 is narrow, it is easy to secure the work space and perform the installation work.

  Next, in the fixed fire hydrant main body 7, the joint portion on the insertion side of the connecting hose 6 is connected to the joint portion 67 of the joint member 65 through the insertion port provided in the box body 71, The connection hose 6 is extended to the fire hydrant valve unit 5 through the installation space 14, and a joint portion on the insertion side (not shown) of the connection hose 6 is connected to the joint portion 55. By this operation, the water distribution main pipe 4 and the fire hose 74 in the fire hydrant main body 7 can be easily connected. The length of the steel pipe is cut and threaded by adjusting the length as in the conventional case, and is routed using an elbow or the like. There is no need to perform pipe connection work such as bolt tightening, and the pipe work is completed simply by connecting both ends of the connection hose 6 to the joints. The joint portions 67 and 55 may be other than a plug-in type, for example, a screw joint.

  In addition, about the length of the hose 6 for connection, although the length with margin is preferable, when too long, a bending part will generate | occur | produce and natural drainage in the hose 6 will become impossible. Therefore, the length of the connecting hose 6 is set to a length close to the portion between the fire hydrant body 7 and the fire hydrant valve unit 5. In addition, when a large margin is given to the length of the connecting hose 6, for example, by preparing a cylindrical shaft body and winding it in a spiral manner, the whole is inclined in one direction, It is possible to allow the water in the connecting hose 6 to be drained naturally without generating a flexure.

  Similarly to the connection hose 6, the tube 62 through which the wire 61 drawn from the opening / closing lever 83 is passed is extended to the fire hydrant valve unit 5 through the installation space 14 through the insertion opening provided in the box 71. , Connected to the interlocking pulley 57 in the box 56 of the fire hydrant valve 52. By this operation, the interlocking pulley 57 of the fire hydrant valve 52 and the opposing pulley 84 of the opening / closing lever 83 can be easily interlocked, and the opening / closing operation of the fire hydrant valve 52 can be performed even by the remote opening / closing lever 83.

  Since the fire hydrant device 2 installed in this way has the automatic pressure regulating valve 53 on the fire hydrant valve unit 5 side, the secondary side portion of the automatic pressure regulating valve 53 is applied with a pressure equal to or lower than a predetermined pressure. The connection hose 6 equivalent to the fire extinguishing hose 74 can be used. In addition, a steel pipe may be used as the connecting hose 6, and the joint portion of the connecting hose 6 and the joint portions 55 and 67 may be in the shape of joint portions that can be coupled to each other, such as a flange. There may be.

  As described above, the fire hydrant valve unit 5 of this embodiment has a flange portion 54 as a coupling portion coupled to the branch pipe 41 from the water distribution main pipe 4 and a pipe for opening / closing control on the piping following the coupling portion 54. A fire hydrant valve 52 as a main valve part in which the valve body is arranged, and an automatic pressure regulating valve 53 are arranged on the secondary side of the main valve part 52, and project downward from the bottom of the main body part 53a of the automatic pressure regulating valve 53. A pressure adjusting unit 59 having an automatic drain valve 58 as a drain valve, and a pipe connected to a fire hose 74 of the fire hydrant body 7 are provided in a pipe continuous to the secondary chamber of the automatic pressure control valve 53. A joint part 55 as a pipe joint part, and the joint part 54, the main valve part 52, the pressure regulating part 59, and the pipe joint part 55 are integrated, and the separated pipe parts are integrated. Water distribution as fire hydrant valve unit 5 May be connected to the branch pipe 41 of the tube 4, the construction is simple.

  In addition, the fire hydrant valve unit 5 is configured so that the piping from the coupling portion 54 through the main valve portion 52 is in the horizontal direction and the longitudinal direction of the automatic pressure regulating valve 53 is oriented in a direction orthogonal to the horizontal direction. A pressure regulating valve 53 is arranged, and a pipe continuing to the secondary chamber of the automatic pressure regulating valve 53 projects upward from the same surface. Compared with the case where the piping continuously connected to the secondary chamber of the automatic pressure control valve 53 and the drain valve 58 protrude in the opposite direction from the automatic pressure control valve 53, the width of the fire hydrant valve unit 5 is compact. Can be. At this time, since the automatic pressure regulating valve 53 is laid down, the height of the fire hydrant valve unit 5 can be made compact.

  Further, in the fire hydrant valve unit 5, the valve body of the main valve portion 52 is a ball valve, and the interlocking pulley 57 interlocking with the ball valve is in a direction perpendicular to the pipe from the coupling portion 54 in the horizontal direction from the ball valve portion. It is arrange | positioned in the position which protrudes. When the piping continuous to the secondary chamber of the automatic pressure regulating valve 53 and the drain valve 58 protrude from the automatic pressure regulating valve 53 in the height direction, the fire hydrant is caused to protrude from the automatic pressure regulating valve 53 in the depth direction by causing the interlocking pulley 57 to protrude in the depth direction. The valve unit 5 can maintain a compact width and height.

  The fire hydrant valve unit 5 has a shape in which an automatic pressure regulating valve 53 constituting the pressure regulating unit 59 has a shape in which a pressure setting unit 53b provided with a spring protrudes from the main body 53a, and the pressure setting unit 53b The main body 53a protrudes in the horizontal direction in a direction perpendicular to the pipe from the coupling portion 54. When the piping continuous with the secondary chamber of the automatic pressure regulating valve 53 and the drain valve 58 protrude from the automatic pressure regulating valve 58 in the height direction, the pressure setting portion 53b protrudes from the main body portion 53a of the automatic pressure regulating valve 53 in the depth direction. By doing so, the fire hydrant valve unit 5 can maintain a compact width and height. At this time, the pressure setting portion 53b protrudes to the opposite side so as not to hit the box 56 of the fire hydrant valve 52, thereby reducing the area in plan view.

  As described above, as the fire hydrant valve unit 5, by arranging the respective parts (the coupling part 54, the original valve part 52, the pressure regulating part 59, and the pipe coupling part 55) in combination on the same horizontal surface, It can be compact and can be downsized.

  And any one of the above-mentioned fire hydrant valve units 5 can be used as the fire hydrant device 2. Furthermore, the fire hydrant valve unit 5 can be installed in the vicinity of the water distribution main 4, the fire hydrant main body 7 can be installed in a desired area to be protected, and the fire hydrant valve unit 5 and the fire hydrant main body 7 can be connected by piping. .

  Moreover, in the fire hydrant apparatus 2 of this embodiment, the fire hydrant which has the fire hose 74 which has the nozzle 73 in the front-end | tip part in a housing | casing, and built the fire hydrant valve 52 in the branch part from the water distribution main pipe 4 provided outside a housing | casing. The valve unit 5 is installed and connected from the secondary side of the fire hydrant valve 52 to the fire hose 74 using the connection hose 6, and when the water is discharged from the nozzle 73, the fire hydrant valve 52 Since the fire hose is allowed to flow into the connection hose 6 and is connected with the connection hose 6 that is not filled inside, it can be reduced to pipe installation work in addition to heat insulation work. Work time can be greatly reduced.

  Further, the fire hydrant valve unit 5 has an automatic drain valve 58 and an automatic pressure regulating valve 53 integrated with the fire hydrant valve 52, and a receiving member 65 for receiving the joint portion of both the hoses 6 and 74 is provided in the fire hydrant body 7. Since the fire hydrant valve unit 5 and subsequent parts (secondary side) are regulated to a predetermined pressure, the connecting hose 6 is not required to have excessive pressure resistance, and is equivalent to the fire hose 74. A hose can also be used, and if a hose equivalent to the fire extinguishing hose 74 is used and a similar joint is used for the detachable portion, the connection work can be easily performed.

DESCRIPTION OF SYMBOLS 1 Tunnel, 2 Fire hydrant apparatus, 4 Water distribution main, 5 Fire hydrant valve unit, 6 Connection hose (pipe member), 7 Fire hydrant main body, 11 Side wall recessed part, 12 Road surface, 13 Inspection path, 14 Installation space, 41 Branch pipe , 42 Pipe joint, 52 Fire hydrant valve, 53, Automatic pressure regulating valve, 53a Body part, 53b Pressure setting part, 54 Flange part, 55 Joint part, 56 box, 57 Interlocking pulley, 58 Automatic drain valve, 59 Pressure regulating part, 61 Wire, 62 Tube, 65 Receiving member, 67 Joint, 68 Maintenance valve, 71 Box, 72 Front panel, 73 Nozzle, 74 Fire extinguishing hose, 75 Hose bucket, 76 Base frame, 77 Fire hydrant door, 78 Fire extinguisher door, 79 Handle, 80 Handle, 81 Indicator light, 82 Transmitter, 83 Open / close lever, 84 Opposing pulley.

Claims (6)

A coupling part coupled to a branch pipe from the water main,
A main valve part in which a valve body for opening and closing control is arranged in a pipe following the coupling part;
An automatic pressure regulating valve is disposed on the secondary side of the original valve portion, and a pressure regulating unit including a drain valve protruding downward from the bottom of the main body of the automatic pressure regulating valve;
A pipe connecting part that is provided in a pipe continuous with the secondary chamber of the automatic pressure regulating valve and is connected to a pipe connected to a fire hose of the fire hydrant main body, the connecting part, the original valve part, and the pressure regulating part And the fire hydrant valve unit characterized by integrating the pipe joint.   The automatic pressure regulating valve is disposed so that the pipe extending from the coupling portion through the main valve portion is in the horizontal direction, and the longitudinal direction of the automatic pressure regulating valve is oriented in a direction perpendicular to the horizontal direction of the automatic pressure regulating valve. The fire hydrant valve unit according to claim 1, wherein a pipe continuous to the secondary chamber protrudes upward from the same surface.   The valve body of the original valve portion is a ball valve, and an interlocking pulley interlocking with the ball valve is disposed at a position protruding from the ball valve portion in a direction perpendicular to the pipe from the coupling portion in the horizontal direction. 2 fire hydrant valve units.   An automatic pressure regulating valve constituting the pressure regulating unit has a shape in which a pressure setting unit provided with a spring projects inside the pressure setting unit from the main body, and the pressure setting unit is horizontal from the main body and orthogonal to the pipe from the coupling unit. The fire hydrant valve unit of Claim 2 which protrudes in the direction to do.   A fire hydrant apparatus using the fire hydrant valve unit according to any one of claims 1 to 4. The fire hydrant apparatus according to claim 5, wherein the fire hydrant valve unit is installed in the vicinity of the water distribution main, the fire hydrant main body is installed in a desired area to be protected, and the fire hydrant valve unit and the fire hydrant main body are connected by piping.

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