JP5603682B2 - Fire hydrant equipment - Google Patents

Description

The present invention relates to a fire hydrant device that opens a fire hydrant door and pulls out a hose with a water discharge nozzle to discharge water.

  Conventionally, a fire hydrant device has been installed in a tunnel such as an automobile road in preparation for a fire.

  Such a fire hydrant device opens a fire hydrant valve by opening a fire hydrant door, pulling out a hose with a nozzle, and operating a fire hydrant valve opening / closing lever provided in the door in the event of a vehicle accident involving a fire. Can be turned on when the lever is open, and the fire pump can be activated to discharge water.

FIG. 9 is an explanatory view of a water discharge system provided in a conventional fire hydrant apparatus. Fire hydrant apparatus 100 of FIG. 9 is branched connected to a fire hydrant valve 106 as well as connecting the water supply pipe 102 water for pressurized圧消fire is supplied to the water supply valve 104. Following the fire hydrant valve 106, an automatic pressure regulating valve 108 for adjusting the water discharge pressure to a specified pressure is disposed. The secondary side of the automatic pressure regulating valve 108 is connected via a maintenance device 114 to a hose 110 having a nozzle 112 attached to the tip.

JP 2005-318972 A JP 2009-183415 A

  However, in such a conventional tunnel fire hydrant device, when foreign matter such as dust becomes clogged due to clogging in the nozzle or hose, the water discharge pressure rises due to clogging of the nozzle, etc. There is a problem that the flow rate from the nozzle is greatly reduced because the pressure regulating valve performs pressure control to maintain the water discharge pressure at a predetermined pressure by restricting the opening of the valve seat.

  In addition, when water for fire extinguishing leaks due to damage to the hose or piping system, the water discharge pressure decreases, but the automatic pressure regulating valve is a pressure that keeps the water discharge pressure at a predetermined pressure by increasing the opening of the valve seat in response to the pressure drop Since control is performed, there is a problem that leakage from the hose or the like increases, and damage to the hose is further enlarged.

  Even if a pressure gauge or pressure sensor is installed on the secondary side of the automatic pressure control valve to monitor the water discharge pressure, the automatic pressure control valve will not function even if foreign matter such as dust is clogged in the nozzle or leakage from the hose occurs. Since the pressure control is performed so as to maintain a predetermined pressure, the water discharge pressure is normal, and there is a problem that nozzle clogging and leakage from the hose are not known even when looking at the pressure in the pipe.

  In addition, the fire hydrant device periodically inspects, actually discharges water, measures the discharge water pressure, and adjusts the pressure adjustment section provided in the automatic pressure control valve. Depending on the structure of the automatic pressure control valve, 1 Even if the pressure on the secondary side fluctuates slightly due to fluctuations in the pressure on the secondary side, even if there is a pressure increase due to damage to the hose, etc. or pressure decrease due to leakage, it is automatically recognized without causing the leak or clogging on the hose side. It is conceivable that the inspection is terminated simply by adjusting the pressure regulating valve, and there is a problem that correct inspection cannot be performed.

An object of this invention is to provide the fire hydrant apparatus which suppresses the fall of the water discharge performance by nozzle clogging, hose damage, etc., and can detect abnormality occurrence reliably from water discharge pressure.

The present invention is a fire hydrant device provided with a water discharge system for supplying pressurized fire-fighting water to a hose with a nozzle and discharging the water.
The drainage system is
A constant flow valve for adjusting the amount of water pressure extinguishing water supplied to the nozzle with a hose to a predetermined constant flow rate from the water supply pipe,
A fire hydrant valve that is arranged in series with the constant flow valve and is opened and closed by operating a fire hydrant valve opening and closing lever;
A pressure detector that is disposed between the hose with the nozzle and the constant flow valve, and detects the water discharge pressure at the time of nozzle water discharge ;
A control unit that determines the presence or absence of abnormality from the discharge pressure detected by the pressure detection unit;
It is provided with.

Here, the control unit, water discharge the water discharge pressure detected by the pressure detecting unit when exceed a predetermined upper limit threshold value, determines an abnormality due to clogging of the secondary part than constant flow valve, detected by the pressure detecting portion When the pressure falls below a predetermined lower threshold, an abnormality due to leakage at the secondary side of the constant flow valve is determined and notified.

Further, a relief valve is provided on the secondary side of the fire hydrant valve, and is opened to the drainage side to lower the pressure when the pressure at the time of nozzle discharge exceeds a predetermined set pressure.

And when the water discharge pressure detected by the pressure detecting unit is exceeded a predetermined threshold value set approximate to pressure of the relief valve, to notify to determine the abnormality.

  In addition, when the water discharge pressure detected by the pressure detection unit falls below a predetermined threshold that is lower than a predetermined water discharge pressure determined by the amount of water discharged from the nozzle, the control unit determines and notifies an abnormality.

Water discharge lines, following the water supply piping is disposed a constant flow rate valve, placing the fire hydrants valve on the secondary side of the constant flow valve.

Water discharge lines, following the water supply piping arranged hydrant valve, placing the constant flow valve on the secondary side of the fire hydrant valve.

A discharge check system is provided for the discharge system.
A water discharge check valve that is placed in a pipe that is branched and connected to the secondary side of the constant flow valve, and that is controlled to open during inspection,
An orifice that is arranged on the secondary side of the water discharge check valve, and that allows an inspection water amount corresponding to the water discharge amount of the hose with nozzle to flow to the drainage side;
Equipped with a,
Pressure detection unit, when the water discharge check valve is open control, you detect the water discharge pressure to the drainage side through the orifice.

In this case, the control unit is further provided with a relief valve that is disposed on the secondary side of the fire hydrant valve and opens to the drainage side to reduce the pressure when the nozzle discharge water pressure exceeds a predetermined set pressure. the water discharge inspection valve opening control and by drainage into the drain side through the orifice, when the water discharge pressure detected by the pressure detection unit during inspection water discharge has exceeded a predetermined upper limit threshold value corresponding to the setting pressure of the relief valve, the orifice side An abnormality due to clogging is determined and notified.

  A maintenance device is provided on the secondary side of the water discharge check valve to switch from the communication state to the drainage side to the communication state to the connection portion to which the inspection nozzle is connected.

  According to the fire hydrant device of the present invention, when the fire hydrant valve is opened by operating the fire hydrant valve opening / closing lever to supply pressurized fire-fighting water to the hose with a nozzle, the constant flow rate is adjusted to a predetermined nozzle water discharge amount by the constant flow valve. Fire extinguishing water is supplied, and fire extinguishing water at a predetermined flow rate can always be discharged from the nozzle.

  In addition, when foreign matter such as dust is clogged on the secondary side of a fire hydrant valve such as a nozzle or hose, the constant flow valve increases the water discharge pressure to keep the water discharge from the nozzle at a predetermined flow rate. Even if the nozzle is clogged, the water can be discharged with the reduction of the discharged water amount suppressed as much as possible, and the deterioration of the water discharging performance can be suppressed.

  In addition, the constant flow valve increases the water discharge pressure in order to maintain a predetermined flow rate against nozzle clogging, but if a water discharge pressure exceeds the relief set pressure because a relief valve with a predetermined set pressure is arranged on the water discharge side. The relief valve opens to allow fire-fighting water to flow to the drainage side and suppress the rise in the discharge pressure to the relief setting pressure. For this reason, even if a constant flow valve is provided, the increase in the discharge pressure is limited to the relief setting pressure, and it is possible to prevent the discharge operator pressure from becoming too high and the nozzle operator from receiving a large reaction force and making it difficult to operate.

Also, if the water discharge pressure is monitored by the pressure detection unit has exceeded a predetermined upper threshold value by clogging of the secondary side, the abnormality judgment and to notify, be appropriately performed corresponding measures to eliminate clogging it can.

  In addition, when the water discharge increases due to water leakage due to hose damage, etc., the constant flow valve operates to reduce the water discharge pressure to keep the water discharge from the nozzle at a predetermined flow rate, thereby suppressing leakage from the hose. And it can control that damage to a hose becomes large.

Also, when the discharge pressure monitored by the pressure sensor falls below the lower threshold value lower than the specified discharge pressure, an abnormality due to water leakage is determined and notified, and appropriate measures are taken to eliminate the hose side leakage. be able to.

Explanatory drawing which showed the external appearance of the fire hydrant apparatus by this invention Explanatory drawing showing the internal structure after removing the fire hydrant door and maintenance door of FIG. Explanatory drawing which showed 1st Embodiment of the water discharge system in the fire hydrant apparatus of this invention Explanatory drawing which showed an example of the constant flow valve used by embodiment of FIG. This explanatory view showing another example of the constant flow valve used in the embodiment of FIG. Explanatory drawing which showed the other example of the constant flow valve used by embodiment of FIG. Explanatory drawing which showed 2nd Embodiment of the water discharge system in the fire hydrant apparatus of this invention Explanatory drawing which showed 3rd Embodiment of the water discharge system in the fire hydrant apparatus of this invention Explanatory drawing which showed the water discharge system in the conventional fire hydrant apparatus which provided the automatic pressure regulation valve

  FIG. 1 is an explanatory view showing the front of a fire hydrant device installed in a tunnel of the present invention. In FIG. 1, the fire hydrant device 10 is provided with a fire hydrant door 30 and a maintenance door 32 at the door opening on the right side of the decorative plate 28 disposed on the front surface of the housing 26, and the inside thereof includes a hose storage space and a valve storage space. It has become.

  The fire hydrant door 30 opens and closes forward about the lower rotation axis. On the fire hydrant door 30 is provided a maintenance door 32 that opens and closes upward by the upper pivot shaft, and can be opened by removing the inner lock after opening the fire hydrant door 30 during inspection.

  A notification device door 34 is provided on the right side of the left door opening of the housing 26, and a red indicator lamp 36, a transmitter 38, and a response lamp 40 are provided here. The red indicator lamp 36 is always lit so that the installation location of the fire hydrant device 10 can be seen from a distance. In the event of a fire, when the transmitter 38 is pressed and the switch button is turned on, a transmission signal is transmitted to the disaster prevention receiving board 18 installed in the monitoring room, a fire alarm is issued, and a response signal is accordingly sent to the disaster prevention receiving board 18 of FIG. The response lamp 40 is turned on.

  A fire extinguisher door 42 is provided on the left side of the reporting device door 34. The inside of the housing corresponding to the fire extinguisher door 42 is used as a fire extinguisher storage space, and two fire extinguishers 45 are accommodated as shown in FIG. Yes. The fire extinguisher door 42 can be opened forward with the left side as a pivot. In addition, a viewing window 45 is provided below the fire extinguisher door 42 so that the presence or absence of the fire extinguisher can be confirmed from the outside.

  FIG. 2 is an illustration showing the internal structure of the fire hydrant apparatus of FIG. 1 with the fire hydrant door removed. In FIG. 2, a hose storage space is formed on the left side of the housing right side opening, and a valve storage space is formed on the right side.

  The hose storage space is provided with a hose bucket 46 that surrounds the hose 50 and presses the hose 50, and the hose 50 is housed in the hose storage space surrounded by the hose bucket 46 and the inner wall of the housing. The hose bucket 46 partitions and forms a hose outlet 48 at a position that is substantially in the center in the left-right direction of the door opening by the lattice-like frame arrangement. On the right side of the hose bucket 46, a nozzle 52 attached to the tip of the hose 50 drawn from the hose outlet 48 is detachably held sideways.

  The valve storage space arranged on the right side of the hose storage space has a constant flow rate behind the water supply valve 54 and the operation guide plate as a water discharge system from the fire hydrant connection port to which the water supply pipe from the pump facility is connected to the hose connection port. A valve, a fire hydrant valve, a maintenance device 56, a relief valve, and an automatic drain valve are provided. The maintenance device 56 normally communicates with the hose connection port on the secondary side of the fire hydrant valve, but when the nozzle with the hose for inspection is connected to the maintenance device 56, the communication between the fire hydrant valve and the hose connection port is released. The secondary side of the fire hydrant valve communicates with a nozzle with a hose for inspection, and water can be checked with a nozzle with a hose for inspection to check the discharge pressure.

  A fire hydrant valve opening / closing lever 55 is provided for the fire hydrant valve, and opens and closes the fire hydrant valve disposed on the back side of the operation guide plate provided corresponding thereto. At the same time, the valve open / close detection switch installed behind the fire hydrant valve open / close lever 55 is turned on, whereby a pump start signal is sent to the pump equipment via the disaster prevention reception board installed in the monitoring room, etc., and the pump equipment is started. Is done. When stopping water discharge, returning the hydrant valve opening / closing lever 55 to the original upward position closes the hydrant valve and simultaneously turns off the valve opening / closing detection switch to stop the operation of the pump equipment.

  A pump start switch 58 is disposed in front of the water supply valve 54. The water supply valve 54 and the pump start switch 58 are devices operated by the fire brigade when the fire is extinguished. Even if the fire hydrant door 30 is opened, it is hidden by the maintenance door 32 and is not shown to the general user who wants to operate the fire hydrant device. , So as not to cause unnecessary confusion.

  FIG. 3 is an explanatory view showing a first embodiment of a water discharge system provided in the fire hydrant apparatus of the present invention. In FIG. 3, the water discharge system is a constant flow valve that adjusts the water discharge amount supplied to the hose with the nozzle to a predetermined constant flow rate Q, for example, Q = 130 [liter / min] on the branch side of the water supply pipe 60 with respect to the water supply valve 54. 62 is arranged.

  Following the constant flow valve 62, a fire hydrant valve 64 that is opened and closed by operating a fire hydrant valve opening / closing lever is disposed, and a hose connection pipe 66 is connected to the secondary side thereof. Between the hose connection pipe 66 and the drain pipe 70, there is disposed a relief valve 68 that opens to the drain side and lowers the water pressure in the hose connection pipe 66 when the pressure at the time of nozzle discharge exceeds a predetermined relief set pressure. ing. The relief set pressure is determined so that the reaction force from the nozzle does not impair operability and does not cause hose breakage. An automatic drain valve 71 is provided in parallel with the relief valve 68. During normal monitoring, the hose connection pipe 66 communicates with the drain pipe 70, and when the fire is extinguished, the communication with the drain pipe 70 is released by the pressure of water supplied into the pipe. To do.

  The hose connection pipe 66 is provided with a pressure sensor 76 as a pressure detection unit for detecting a discharge pressure, and a discharge pressure detection signal is input to a control device 75 functioning as a control unit as indicated by a dotted line. The control device 75 is connected to a disaster prevention receiving board (not shown) installed in a monitoring room or the like, and determines whether the discharge pressure is normal by comparing the pressure detection signal with a threshold value.

The abnormality determination of the water discharge pressure by the control device 75 includes an abnormality determination of the water discharge pressure due to nozzle clogging and the like, and an abnormality determination of the water discharge pressure due to hose leakage and the like. When nozzle clogging occurs, the discharge flow rate decreases, and the constant flow valve 62 starts control to a specified flow rate and increases the discharge pressure. If water discharge pressure increases, the relief set pressure performed is exceeded the relief valve 68 is a relief operation, lowering the water pressure in the hose connecting pipe 66, harm with a nozzle excessive pressure is applied the operator Do not damage the pipes or hoses.

Controller 75, the relief set pressure or of the relief valve 68 is an upper threshold corresponding to the relief set pressure, for example to set the upper limit threshold value slightly becomes lower than the relief setting pressure, the water discharge pressure by the pressure sensor 76 detects the upper threshold super When the error is detected, the clogging of the nozzle or the like is determined, and the determination result is sent to a disaster prevention receiving board installed in a monitoring room or the like to notify the abnormality.

  On the other hand, when a water leak occurs from the hose or the pipe, the discharge flow rate increases, and the constant flow valve 62 starts control to a specified flow rate, and decreases the discharge pressure. Therefore, the control device 75 sets a predetermined lower threshold value where the water discharge pressure detected by the pressure sensor 76 is lower than the specified water discharge pressure, determines hose leakage when the water discharge pressure falls below the lower threshold value, and monitors the determination result. Announce the abnormality by sending it to the disaster prevention reception board installed.

  Normally, the amount of water discharged from the nozzle is known in advance at the time of design, and the length of the hose is also known. Therefore, if the nozzle or hose is normal, the specified pressure detection value of the pressure sensor 76 at the time of water discharge is known. Therefore, when a water leak occurs, the flow rate increases because water is emitted from other than the nozzle. Therefore, the pressure detection value when the flow rate increases is set as the lower limit threshold value, and it is determined as abnormal when the flow rate increases and the pressure detection value of the pressure sensor 76 falls below the predetermined lower limit threshold value.

  Since the fire hydrant device 10 is provided with a red indicator lamp 34 that is always lit as shown in FIG. 1, the control device 75 determines that the discharge water pressure is abnormal due to nozzle clogging or hose leakage. For example, the abnormality may be notified by blinking or blinking the red indicator lamp 36. The blinking display of the red indicator lamp 36 is also a blinking operation even when a fire has occurred and the water has been discharged. Therefore, for example, the blinking speed may be changed to be distinguished from the blinking display at the time of water discharge. Or in order to show an abnormal state, you may switch from a steady lighting state to light extinction. In addition, a pressure detection signal is sent from the control device 75 to the disaster prevention receiving board, and the presence or absence of nozzle clogging or hose leakage is determined by displaying the discharge water pressure measured value, comparing with the initial value, or comparing with the upper and lower thresholds. May be informed.

  The operation of the water discharge system in FIG. 3 is as follows. When the fire hydrant door 30 is opened in the event of a fire and the hose 50 with the nozzle is pulled out, and the hydrant valve opening / closing lever 55 is operated to the open position in this state, the hydrant valve 64 is opened, Receive from 60. At this time, the constant flow valve 62 adjusts the flow rate so that the set constant flow rate Q1 = 130 [liter / min] flows, and can discharge the constant flow rate Q1 from the nozzle.

Here, when clogging occurs on the nozzle or hose side due to dust or the like, the water for fire extinguishing becomes difficult to flow, so the discharge water flow rate decreases from the constant flow rate Q1. That is, between the water discharge pressure P and the water discharge amount Q of the water for fire extinguishing in the water discharge system,
Q = KP ^1/2
When the nozzle side is clogged and the water discharge amount Q decreases from the constant flow rate Q1, the constant flow valve 62 operates to keep the water discharge amount Q at the constant flow rate Q1 by increasing the water discharge pressure P. K is a constant determined by the water discharge system including the constant flow valve 62 and the hose with nozzle.

  However, when the water discharge pressure increased by the operation of the constant flow valve 62 exceeds the relief set pressure of the relief valve 68, the relief valve 68 opens and functions as a safety valve that flows fire-extinguishing water through the drain pipe 70. The water discharge pressure by the flow rate adjusting operation 62 is made not to exceed the relief set pressure. For this reason, the increase in the water discharge pressure due to the operation of the constant flow valve 62 is limited to the relief set pressure, the increase in the reaction force received by the hose operator is suppressed, and the hose is prevented from being damaged.

Increase of water discharge pressure due to the operation of the constant flow valve 62 for the nozzle clogging is detected by the pressure sensor 76, are sent to the control unit 75 as a pressure detection signal, when exceeded a predetermined upper limit threshold value when the opening of the fire hydrant valve, An abnormality due to nozzle clogging is determined, and an abnormality display by the red indicator lamp of the fire hydrant device 10 and / or a signal indicating the determination result is sent to the disaster prevention reception panel to notify the abnormality of the water discharge pressure due to nozzle clogging.

  On the other hand, if water is discharged from the nozzle when there is water leakage due to damage to the hose or the piping system, the water discharge flow rate increases from the constant flow rate Q1. When the water discharge amount Q increases from the constant flow rate Q1 due to water leakage, the constant flow valve 62 operates to keep the water discharge amount Q at the constant flow rate Q1 by reducing the water discharge pressure P. For this reason, when the water discharge pressure is reduced with respect to water leakage, it is possible to suppress the expansion of leakage and the expansion of damage to the hose.

  A decrease in the water discharge pressure due to the operation of the constant flow valve 62 with respect to leakage from a hose or the like is detected by the pressure sensor 76 and sent to the control device 75 as a pressure detection signal, and water is discharged only from a nozzle whose water discharge amount is known in advance. If there is a flow of water that is clearly larger than the amount of discharged water, and the measured value of the pressure sensor 76 falls below a predetermined lower threshold, an abnormality due to water leakage is determined, an abnormality is displayed by the red indicator lamp of the fire hydrant device 10, and Alternatively, a signal indicating the determination result is sent to the disaster prevention reception board to notify the abnormality of the water discharge pressure due to water leakage.

  FIG. 4 is an explanatory view showing an example of the constant flow valve 62 used in the first embodiment of FIG. In FIG. 4, the constant flow valve 62 has a valve body 136, an inflow port 138 is formed on the left side of the valve body 136, and an outflow port 140 is formed on the right side.

  On the inflow port 138 side, a piston 144 having a valve hole 145 is slidably incorporated by positioning by a stop ring 149, and a spring 146 is disposed between the spring holder 150 on the right side of the piston 144, and further, a spring. A spring 148 is disposed between the holder 150 and the needle holder 143 on the right side thereof. The tip of a needle 142 disposed on the right side of the valve hole 145 of the piston 144 is located, and the needle 142 is fixed to the valve body 136 by a needle holder 143.

  The operation of the constant flow valve 62 in FIG. 4 is as follows. When the flow rate decreases due to nozzle clogging or the like, the pressure on the outflow port 140 side increases, the pressure on the inflow port 138 is relatively low, so the force pushing the piston 144 is small, and the pressure on the springs 146 and 148 is low. The piston 144 moves to the side closer to the stopper ring 149 to increase the opening area between the tip of the needle 142 and the valve hole 145 and increase the flow rate flowing through the outflow port 140 to maintain a constant flow rate.

  In addition, when the flow rate increases due to leakage due to hose breakage or the like, the pressure on the outflow port 140 side decreases, and the pressure on the inflow port 138 is relatively high. The piston 144 moves to the right against 148, and the valve hole 145 approaches the needle 142, thereby reducing the opening area and decreasing the flow rate flowing through the outflow port 140 to maintain a constant flow rate.

  FIG. 5 is an explanatory view showing another example of the constant flow valve 62 used in the first embodiment of FIG. 3. In this example, the needle side is moved in accordance with the primary side pressure. It is characterized by that.

  In FIG. 5, the constant flow valve 62 has an inflow port 152 on the left side of the valve body 151 and an outflow port 154 on the right side, and a needle 156 positioned by a stopper ring 158 is slidably incorporated therein. A spring 162 is arranged on the right side of 156. A communication hole 160 is provided in the needle 156, and a valve hole 164 is formed in the valve body 151 on the distal end side of the needle 156.

  The operation of the constant flow valve 62 in FIG. 5 is as follows. When the flow rate decreases due to nozzle clogging or the like, the pressure on the outflow port 154 side increases and the pressure on the inflow port 152 is relatively low, so the force that pushes the needle 156 to the right is weak, and the needle 156 has a valve hole 164. , The opening area that becomes a gap between the valve hole 164 and the needle 156 is increased, and the flow rate flowing to the outflow port 154 is increased to maintain a constant flow rate.

  When the flow rate increases due to a hose leak or the like, the pressure on the outflow port 154 side decreases and the pressure on the inflow port 152 is relatively high, so the spring 162 is compressed and the needle 156 moves to the right side. The opening area between the valve hole 164 is reduced, the flow rate flowing through the outflow port 154 is decreased, and a constant flow rate is maintained.

  FIG. 6 is an explanatory view showing another example of the constant flow valve 62 used in the first embodiment of FIG. 3, and is characterized in that the constant flow control is performed using the deformation of a rubber flow washer. It is said.

  In FIG. 6A, the constant flow valve 62 forms an inflow port 168 on the left side of the valve body 166 and an outflow port 170 on the right side. A valve hole 176 is opened inside the valve body 166, and a flow washer 172 made of elastic rubber that is prevented from coming off by a stopper ring 175 is incorporated on the left side of the valve hole 176. The flow washer 172 is a donut-shaped member and has a valve hole 174 opened therein.

  The operation of the constant flow valve 62 in FIG. 6 is as follows. When the flow rate decreases due to nozzle clogging or the like, the pressure on the outflow port 170 side increases, and the pressure on the inflow port 168 is relatively low. Therefore, the force pushing the flow washer 172 as shown in FIG. Is small, the deformation amount of the flow washer 172 is reduced, and the opening area determined by the valve hole 174 at that time is increased, thereby increasing the flow rate flowing to the outflow port 170 and maintaining a constant flow rate.

  Further, when the flow rate increases due to leakage of the hose or the like, the pressure on the outflow port 170 side decreases and the pressure on the inflow port 168 is relatively high. Therefore, as shown in FIG. As the pressing force increases, the flow washer 172 is deformed into a conical shape that constricts the valve hole 174, and the opening area of the valve hole 174 decreases. As a result, the flow rate flowing through the outflow port 170 is decreased to maintain a constant flow rate.

  Of course, as the constant flow valve 62 used in the first embodiment of FIG. 3, a constant flow valve having an appropriate structure other than those shown in FIGS. 4 to 6 can be used.

FIG. 7 is an explanatory view showing a second embodiment of the water discharge system provided in the fire hydrant device of the present invention. In this embodiment, the water supply pipe 60 is connected to the fire hydrant valve 64, and 2 of the fire hydrant valve 64. the following side has arranged the constant flow valve 62, are interchanged sequentially quantitative amount valve 62 and the hydrant valve 64 to the first embodiment of FIG. The other configuration is the same as that of the first embodiment of FIG.

In the second embodiment of FIG. 7, the fire hydrant valve 64 is disposed on the water supply pipe 60 side, so that the constant flow valve 62 disposed on the secondary side is not added with fire extinguishing water during normal monitoring , and is a dry type. Therefore, durability can be improved.

  FIG. 8 is an explanatory view showing a third embodiment of the water discharge system provided in the fire hydrant apparatus of the present invention. In this embodiment, a water discharge inspection system is provided for the water discharge system.

  In FIG. 8, the water discharge system is basically the same as that of the first embodiment of FIG. 3, and a constant flow valve 62 is disposed on the branch side of the water supply pipe 60 with respect to the water supply valve 54, and the fire hydrant follows the constant flow valve 62. A valve 64 is arranged, and a hose connection pipe 66 is connected to the secondary side thereof.

A relief valve 68 and an automatic drain valve 71 are arranged between the hose connection pipe 66 and the drain pipe 70 . Further, a pressure sensor 76 for detecting the discharge pressure is disposed on the secondary side of the constant flow valve 62, and the discharge pressure detection signal is input to the control device 75 functioning as a control unit as indicated by a dotted line. The control device 75 is connected to a disaster prevention reception board installed in a monitoring room or the like by signal lines, and compares the pressure detection signal with a threshold value to determine whether or not the discharge water pressure is abnormal due to clogging of the nozzle, and the discharge water pressure is abnormal due to water leakage. Determine.

  For the water discharge system in which the constant flow valve 62 and the fire hydrant valve 64 are arranged, a water discharge check system including a water discharge check valve 72 and an orifice 74 is provided. In the water discharge check system, a water discharge check valve 72 using an electric valve is arranged in a branch pipe from between the constant flow valve 62 and the fire hydrant valve 64, and a nozzle is provided between the secondary side of the water discharge check valve 72 and the drain pipe 70. An orifice 74 is provided which functions as a pseudo nozzle for flowing a check water amount corresponding to the water discharge amount of the attached hose to the drain pipe 70.

The operation of the water discharge inspection system, for example, sends an inspection start signal to the control device 75 of the fire hydrant device 10 by operating a disaster prevention reception panel provided in a monitoring room or the like, and the control device 75 controls to open the water discharge check valve 72 in response to this. The fire extinguishing water having a constant flow Q1 adjusted by the constant flow valve 62 is passed through the orifice 74 to the drain pipe 70 . The inspection start operation may be performed by opening control of the water discharge check valve 72 by operation of an inspection start switch provided in the fire hydrant apparatus or opening operation of a manual check valve provided in parallel with the water discharge check valve 72.

  The pseudo water discharge pressure generated by the orifice 74 being inspected is detected by the pressure sensor 76, and sent to the disaster prevention receiving panel from the control device 75 as an inspection result, displayed or compared with a predetermined threshold value to determine whether it is normal or abnormal. To do.

In this case, the control device 75 when the water discharge pressure detected by the pressure sensor 76 has exceeded a predetermined upper limit threshold value corresponding to the relief set pressure of the relief valve 68, it is determined that an abnormality due to clogging of the orifice 74 side due to dust notification To do. You may add the pressure gauge provided with the display part which can confirm a pressure visually at the position of the fire hydrant apparatus in the position of the pressure sensor 76.

  In the above-described embodiment, the discharge pressure is detected by the pressure sensor as the pressure detection unit and an abnormality is determined. However, the pressure detection unit is turned on when the discharge water pressure exceeds the upper limit threshold and falls below the lower limit threshold. Alternatively, a two-circuit pressure switch that outputs a detection signal may be provided. Further, either the upper threshold or the lower threshold may be monitored.

  Further, in the embodiment of FIG. 8, a maintenance device that can switch the communication state during the inspection similar to the maintenance device 56 of FIG. 2 may be provided between the water discharge check valve 72 and the drain pipe 70. In this maintenance device, the water discharge check valve 72, the orifice 74, and the drain pipe 70 are in communication with each other at normal times, but the water discharge check valve 72, the orifice 74, and the nozzle with the inspection hose are switched in communication with each other.

  By providing a maintenance device between the water discharge check valve 72 and the drain pipe 70, a constant flow valve is installed at the site where the fire hydrant device is installed by connecting a nozzle with a hose for inspection to the maintenance device and discharging water. 62 functions can be confirmed. In this case, if a pressure gauge provided with a display unit capable of visually confirming the pressure at the location of the fire hydrant device is added to the position of the pressure sensor 76, the on-site inspection can be easily performed.

  Furthermore, after confirming the function of the above constant flow valve, in place of the nozzle of the nozzle with the hose for inspection, the nozzle 52 used in the actual fire installed in the fire hydrant device is connected to the maintenance device and the water discharge is inspected. 52 can be checked for clogging. With such a configuration, the constant flow valve 62 and the nozzle 52 can be easily inspected at the installation site of the fire hydrant device. The maintenance device 56 of FIG. 2 may be eliminated and a maintenance device may be provided only for the water discharge check valve 72 described above.

The present invention includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire hydrant device 26: Housing 60: Water supply pipe 62: Constant flow valve 64: Fire hydrant valve 66: Hose connection pipe 68: Relief valve 70: Drain pipe 71: Automatic drain valve 72: Water discharge check valve 74: Orifice 75: Control Device 76: Pressure sensor 138, 152, 168: Inflow port 140, 154, 170: Outflow port 142, 156: Needle 143: Needle holder 144: Piston 145, 164, 174, 176: Valve hole 146, 148, 162: Spring 150: Spring holder 160: Communication hole

Claims (9)

In a fire hydrant apparatus equipped with a water discharge system for supplying pressurized fire-fighting water to a hose with a nozzle and discharging the water,
The water discharge system is
A constant flow valve for adjusting the amount of pressurized fire-fighting water supplied from the water supply pipe to the nozzle-equipped hose to a predetermined constant flow rate;
A fire hydrant valve disposed in series with the constant flow valve and opened and closed by operating a fire hydrant valve opening and closing lever;
A pressure detector that is disposed between the hose with the nozzle and the constant flow valve, and detects a water discharge pressure at the time of nozzle water discharge;
When the discharge pressure detected by the pressure detection unit exceeds a predetermined upper limit threshold, an abnormality due to clogging of the secondary side portion than the constant flow valve is determined, and the discharge pressure detected by the pressure detection unit is a predetermined value. A control unit for determining and notifying an abnormality due to leakage of the secondary side portion of the constant flow valve when the lower limit threshold is exceeded ;
A fire hydrant device characterized by comprising:
In fire hydrant apparatus according to claim 1, further disposed on the secondary side of the fire hydrant valve, a relief pressure at the time of nozzle water discharge is if it exceeds a predetermined set pressure, reduce the pressure by opening the drain side A fire hydrant device comprising a valve.
In fire hydrant apparatus according to claim 2, wherein, the predetermined threshold water discharge pressure detected by the pressure detecting portion is approximated to a set pressure of the relief valve when exceeded, abnormality determination to notification A fire hydrant device characterized by that.
The fire hydrant apparatus according to claim 1, wherein the control unit is abnormal when the discharge pressure detected by the pressure detection unit falls below a predetermined threshold value lower than a specified discharge pressure determined by the discharge amount discharged from the nozzle. A fire hydrant device characterized by determining and notifying.
The fire hydrant apparatus according to claim 1, wherein the water discharge system includes the constant flow valve disposed following the water supply pipe, and the fire hydrant valve disposed on a secondary side of the constant flow valve. Fire hydrant device.
2. The fire hydrant according to claim 1, wherein the water discharge system has the fire hydrant valve disposed subsequent to the water supply pipe, and the constant flow valve disposed on the secondary side of the fire hydrant valve. apparatus.
The fire hydrant apparatus according to claim 1, wherein a water discharge inspection system is provided for the water discharge system,
The water discharge inspection system is
A water discharge check valve which is arranged in a pipe branched and connected to the secondary side of the constant flow valve and is controlled to be opened at the time of inspection;
An orifice that is disposed on the secondary side of the water discharge check valve, and that allows an inspection water amount corresponding to the water discharge amount of the hose with nozzle to flow to the drainage side;
With
The fire hydrant device, wherein the pressure detection unit detects a water discharge pressure to the drain through the orifice when the water discharge check valve is controlled to open.
The fire hydrant device according to claim 7 , further comprising:
A relief valve that is disposed on the secondary side of the fire hydrant valve and opens to the drainage side to lower the pressure when the pressure at the time of nozzle discharge exceeds a predetermined set pressure;
The control unit opens the water discharge check valve at the time of inspection to discharge water to the drainage side through the orifice, and the water discharge pressure detected by the pressure detection unit during inspection water discharge has a threshold value corresponding to the set pressure of the relief valve. A fire hydrant apparatus that determines and reports an abnormality when exceeding.
The fire hydrant apparatus according to claim 7 , further comprising a maintenance device on the secondary side of the water discharge check valve for switching from a communication state to a drainage side to a connection state to a connection portion to which an inspection nozzle is connected. Features a fire hydrant device.

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