JP6063209B2 - Flowing water detection device and fire extinguishing equipment equipped with the flowing water detection device - Google Patents

Description

  The present invention relates to a running water detection device and a fire extinguishing facility including the running water detection device.

  Conventionally, in sprinkler fire extinguishing equipment, foam fire extinguishing equipment, and water spraying equipment, a water flow detection device is provided in the middle of a pipe that supplies pressurized water from a pressurized water feeding device to a head.

  Since the primary side and the secondary side of the flowing water detection device are normally in the same pressure state, the flowing water detection device is in the closed position by its own weight. When spraying pressurized water from the head in the event of a fire, it receives a drop in pressure on the secondary side, opens the valve body with the primary pressure, and the water flow detector consists of a pressure switch that opens the valve body Is detected, and a running water detection signal is output after a predetermined delay time, and a running water alarm is issued from the fire receiver.

  The flowing water detection device is provided with a hole in the valve seat, and is connected by piping from the hole to a drain pipe through an auto drip for reducing the flow rate. A pressure switch is connected by branching from between a hole provided in the valve seat and the auto drip.

  When the valve element is opened, pressurized water flows through a hole provided in the valve seat, and the pressurized water that has passed through the auto drip is drained from the water distribution pipe while the flow rate is reduced by the auto drip. When the inflow amount from the hole provided in the valve seat exceeds the drainage amount of the auto drip, the contact of the pressure switch is closed. (For example, refer to Patent Document 1).

  The automatic drip of the water flow detector is a pressure switch when the valve element opens slightly and fire extinguishing water leaks from the primary side to the secondary side, such as when dust is caught between the valve element and the valve seat. If the valve body is fully open and fire extinguishing water flows from the primary side to the secondary side, the flow path should be narrowed so that only a small amount of fire extinguishing water can pass. Yes. And the fire-extinguishing water which passed the auto drip is drained from a drain pipe.

JP 2011-024792 A

  However, if foreign matter such as dust is caught between the valve body and the valve seat and the valve body opens slightly and water leaks, the amount of leaked fire extinguishing water cannot pass through the auto drip, The drain of the pressure switch closes due to factors other than fire without draining, and the fire receiver displays the water flow of the water flow detector.

  The present invention has been made in view of such a conventional problem. When the contact of the pressure switch is closed, the cause is water leakage due to partial opening of the valve body, or the valve body due to a fire. An object of the present invention is to provide a water flow detection device that can determine whether fire extinguishing water has flown after being opened.

The present invention closes at the time of monitoring, and in the event of a fire, the valve body that is opened when the pressure in the secondary side pipe becomes lower than the pressure in the primary side pipe, the valve seat on which the valve body is seated, A connecting pipe connecting from the valve seat to the drain pipe, an auto drip provided in the connecting pipe, a branch pipe branching from the connection pipe on the primary side of the auto drip, and a pressure in the connection pipe connected to the branch pipe in water flow detection device and a pressure switch that detect the pressure switch has a first contact point for detecting the pressure rise due to water leakage between the valve body and the valve seat, the valve body is opened when fire And a second contact for detecting an increase in pressure due to the valve , and the first contact operates at a lower pressure than the second contact.

The present invention also relates to a fire extinguishing equipment having a water flow detecting device having a pressure switch for detecting the flow of fire water when the valve body is opened by pressure, and a fire receiver connected to the water flow detecting device by a signal line. in the pressure switch is actuated and the first contact for outputting an abnormality signal operates when water leakage, with high pressure from the contact of the first between the valve seat which the valve body is seated, the and a second contact for outputting a running water signal operates when the valve body is opened in a fire, the fire receiver performs alarming when receiving the abnormal signal, stops the error alarm when receiving the running water signal Thus, a running water warning is performed.

Further, in a fire extinguishing facility having a water flow detection device having a pressure switch for detecting the flow of fire water when the valve body is opened by pressure, and a fire receiver connected to the water flow detection device by a signal line, the pressure switch includes a first contact said valve body to output a first signal operating when water leak between the valve seat seated operates at higher pressure than the contacts of the first, the valve body There and a second contact for outputting a second signal operating when opening a fire, the fire receiver, an abnormality alarm when it receives either the first signal or the second signal When the first signal and the second signal are received, a running water alarm is given.

  In the present invention, since the first contact that operates at a low pressure and the second contact that operates at a high pressure are provided, water leaks due to partial opening of the valve body, and the valve body opens due to a fire and fire extinguishing water. Can be determined.

  Further, according to the present invention, when the fire receiver performs an abnormality alarm, the abnormality alarm is stopped when a running water signal is further received, so that it is possible to clearly distinguish between an abnormality time and a fire time.

  Further, according to the present invention, when the fire receiver receives both the first signal and the second signal, the water flow alarm is performed, so that a more accurate water flow alarm can be performed.

It is a block diagram of the fire extinguishing equipment which concerns on Embodiment 1 and 2 of this invention. It is a block diagram of the flowing water detection apparatus which concerns on Embodiment 1 of this invention. It is a block diagram of the pressure switch of the flowing water detection apparatus which concerns on Embodiment 2 of this invention.

Embodiment 1 of the present invention
[Configuration of fire extinguishing equipment 100]
Hereinafter, the fire-extinguishing equipment 100 according to Embodiment 1 of the present invention will be described with reference to FIG. The fire extinguishing equipment 100 will be described by taking a closed spray fire extinguishing equipment as an example. However, the fire extinguishing equipment is not limited to the closed spray fire extinguishing equipment, and any fire extinguishing equipment provided with the flowing water detection device 1 such as a sprinkler fire extinguishing equipment or a foam fire extinguishing equipment. good.

  Reference numeral 1 denotes a running water detector, which has a secondary side pipe 24 connected to the secondary side and a primary side pipe 26 connected to the primary side. The secondary side pipe 24 and the primary side pipe 26 are supplied with a fire extinguishing chemical solution or fire water. It is filled with pressure and both are kept at almost the same pressure. The flowing water detection device 1 has a check valve mechanism (a valve body 5 to be described later), and when the pressure of the secondary side pipe 24 decreases, the valve body 5 opens, and the primary side pipe 26 and the secondary side pipe. 24 to communicate. In addition, a pressure switch that detects the pressure of the fire-extinguishing water flowing from the primary side pipe 26 to the secondary side pipe 24 when the valve body 5 is opened is provided.

  A closed sprinkler head 22 is connected to the tip of the secondary side pipe 24. The sprinkler head 22 is a horseshoe sprinkler head in which a deflector is fixed under two frames. The heat sensitive part is composed of a glass bulb and supports a valve body that stops the water outlet. When the fire extinguisher aqueous solution is radiated from the outlet, it does not foam so much (for example, less than 5 times the foaming ratio) and does not foam so much that it hits the deflector and is sprayed onto the protected area.

  44 is a mixer having a Venturi tube, and has an inflow port for the fire extinguishing water supplied from the water tank 40, an inflow port for the extinguishing chemical supplied from the fire extinguishing chemical tank 42, and an outlet for the mixed aqueous solution of the extinguishing chemical. . The fire-extinguishing agent aqueous solution generated by mixing the fire-extinguishing water and the extinguishing agent is sent to the flowing water detection device 1 side.

Reference numeral 50 denotes a fire receiver, which is connected to a later-described pressure switch of the flowing water detection device 1 through a signal line, and receives a signal from the pressure switch to notify an alarm.
[Configuration of the flowing water detection device 1]
Hereinafter, the flowing water detection apparatus 1 according to Embodiment 1 of the present invention will be described with reference to FIG.

  The flowing water detection device 1 includes a main body 2 and a flowing water detection unit 3.

  The flowing water detection device 1 forms an inflow port 20 to which the primary side pipe 26 is connected on the lower side of the main body 2, and forms an outflow port 21 to which the secondary side pipe 24 is connected on the upper side. Pressurized water from a pressurized water supply apparatus provided with a fire extinguishing pump or an auxiliary pressurization pump is supplied to the inlet 20 on the primary side. The outlet 21 on the secondary side is connected to a pipe provided with a sprinkler head 22 and supplies pressurized water to the sprinkler head 22.

  The main body 2 has a valve body 5 and a valve seat 7.

  The valve body 5 is incorporated in the flowing water detection device 1 so as to be freely opened and closed. Under normal conditions, the pressure in the piping on the primary side and the secondary side of the flowing water detection device 1 is almost the same, so that the valve body 5 is caused by its own weight and the areas of the primary side and the secondary side of the valve body 5. The valve seat 7 is seated by the force acting in the closing direction due to the difference and is in the closed position. On the other hand, the valve is opened in the event of a fire, and the primary side and the secondary side of the flowing water detector 1 are communicated.

  A drainage port 7 a is provided at the upper end surface of the valve seat 7. When the valve body 7 is closed, the drainage port 7 a is closed by the valve body 7. Therefore, during normal times, fire extinguishing water does not flow into the drain port 7a.

  The flowing water detection unit 3 is connected to the drain port 7 a and includes a connection pipe 9, a drain pipe 11, a branch pipe 13, an auto drip 15, a delay device 17, a first pressure switch 18, and a second pressure switch 19.

  The connection pipe 9 is a pipe that connects the drain outlet 7a and the drain pipe 11 and through which the fire-extinguishing water flowing in from the drain outlet 7a flows. An auto drip 15 is connected to the connecting pipe 9 to restrict the amount of water flowing to the drain pipe 11.

  One end of the branch pipe 13 is connected to the connection pipe 9 on the primary side of the auto drip 15, and the other end is connected to the delay device 17.

  The delay device 17 is connected to the first pressure switch 18 and the second pressure switch 19. The delay device 17 has, for example, a structure called a chamber type, and when fire water flows from the drain port 7a, the fire water (signal water) that flows into the chamber rises and the air pressure in the upper part of the chamber is predetermined. When the value exceeds the value, the switch of the connected pressure switch is turned on to generate an alarm.

  Although the delay device 17 will be described as a chamber type here, the water that flows in from the drain port 7a applies pressure to the inside of the delay device, thereby pushing the internal compression spring, liquid, etc. to make the switch conductive. It may be an expression.

  The first pressure switch 18 has a first contact, and when the signal water flows into the delay device 17 and a pressure of a first threshold value, for example, 0.01 MPa is applied, the contact is closed, A signal is output to the fire receiver 50. The signal water flows into the delay device 17, and the pressure larger than the first threshold and smaller than the second threshold described later is applied to the first pressure switch 18 because dust or the like is placed between the valve body 5 and the valve seat 7. Can occur when the auto drip 15 cannot separate the fire-extinguishing water flowing in from the drain port 7a when water is leaking, that is, when there is water leakage. That is. That is, the signal output from the first pressure switch 18 to the fire receiver 50 is an abnormal signal (first signal) indicating water leakage between the valve body 5 and the valve seat 7.

  The second pressure switch 19 has a second contact, and when the signal water flows into the delay device 17 and a pressure of a second threshold, for example, 0.1 MPa or more is applied, the second contact is made. Closes and outputs a signal to the fire receiver 50. The second threshold value is larger than the first threshold value. For example, the second threshold value is about 10 times the first threshold value. That is, the second pressure switch 19 outputs a signal with a pressure larger than that of the first pressure switch 18. The signal water flows into the delay device 17 and the pressure greater than the second threshold value is applied to the second pressure switch 19 because the valve body 5 is opened due to a fire and the primary side (inlet) 20) and the secondary side (outflow port 21) communicate with each other. That is, the signal output from the second pressure switch 19 to the fire receiver 50 is a flowing water signal (second signal) in which fire-extinguishing water flows from the primary side to the secondary side of the flowing water detection device 1.

  The first pressure switch 18 and the second pressure switch 19 are not provided in the same casing, and are each a separate casing, and a pipe branches from the delay device 17, and pressure is applied to each pressure switch. Supply.

  When the fire receiver 50 receives the abnormality signal output from the first pressure switch 18, the fire receiver 50 notifies the abnormality by an abnormality alarm. Moreover, if the flowing water signal output from the 2nd pressure switch 19 is received, the operation | movement of fire extinguishing equipment will be alert | reported by a flowing water alarm. When the fire receiver 50 receives an abnormal signal and issues an abnormal alarm, the fire receiver 50 stops the abnormal alarm and issues an incoming water alarm when further receiving the flowing water signal. That is, the fire receiver 50 gives priority to the water flow warning over the abnormality warning. This is because the abnormal signal is a signal that is output due to an abnormality such as a water leak in the flowing water detection device 1, but the flowing water signal is a signal that is output by a fire, that is, the flowing signal is equivalent to the fire signal. This is because the flow signal is more urgent than the abnormal signal.

  In the above description, the fire receiver 50 gives priority to the water flow alarm over the abnormality alarm. However, the pressure switch of the water flow detection device 1 is configured to stop the output of the abnormality signal when the water flow signal is output. You may do it.

Further, the fire receiver 50 has the first signal when the signal output from the first pressure switch 18 is the first signal and the signal output from the second pressure switch 19 is the second signal. An abnormality alarm may be issued when either the signal or the second signal is received, and a running water alarm may be performed when both the first signal or the second signal are received. In this way, for example, when a short circuit occurs in any of the signal lines due to an earthquake or water leakage, even if a signal from the second pressure switch 19 is output, the first signal or the first signal By receiving both of the signals of 2 and using them as flowing water signals, a more accurate flowing water alarm can be performed.
[Description of operation]
Operation | movement of the flowing water detection apparatus 1 with the above structures is demonstrated based on FIG.

  First, operation | movement of the flowing water detection apparatus 1 when a fire occurs is demonstrated.

  When a fire occurs, an ascending airflow that transmits heat from the vicinity of the combustible to the ceiling is generated, and the sprinkler head 22 near the fire source is activated. From the sprinkler head 22, a fire extinguishing chemical aqueous solution or fire extinguishing water filled in the secondary side pipe 24 is radiated and sprayed toward the fire source. And the pressure in the secondary side piping 24 falls large.

  When the pressure of the secondary side pipe 24 becomes lower than the pressure of the primary side pipe 26, the valve body 5 of the flowing water detector 1 is opened, and the primary side pipe 26 and the secondary side pipe 24 are in communication with each other. The fire-extinguishing agent aqueous solution filled in the pipe 26 flows into the secondary side pipe 24.

  At this time, in the flowing water detection device 1, the fire extinguishing water flows from the drain port 7 a, and the fire extinguishing water that has not been drained by the auto drip 15 flows into the chamber of the delay device 17 as signal water. Since the valve body 5 is open, a large amount of water flows into the drain port 7a, and the first pressure switch 18 and the second pressure switch 19 are applied with a pressure equal to or higher than the second threshold value.

  An abnormal signal is output from the first pressure switch 18 and a running water signal is output from the second pressure switch 19 to the fire receiver 50. When the fire receiver 50 receives both the abnormal signal and the running water signal, the fire receiver 50 does not issue an abnormal alarm, displays on the panel that the running water has occurred, and issues a running water alarm.

  Next, the operation of the water flow detection device 1 in an abnormal situation such as when foreign matter is caught between the valve body 5 and the valve seat 7 will be described.

  When a foreign object is caught between the valve body 5 and the valve seat 7, the valve body 5 is not fully opened like a fire, but is opened slightly. Due to the slight opening, the fire extinguishing water flows into the drain port 7a. Then, the fire extinguishing water that has not been drained by the auto drip 15 flows into the chamber of the delay device 17 as signal water. This signal water is much smaller than the signal water flowing into the delay device 17 in the event of a fire. Therefore, a pressure not lower than the first threshold and not higher than the second threshold is applied to the first pressure switch 18 and the second pressure switch 19.

Then, an abnormal signal is output to the fire receiver 50 from the first pressure switch. When the fire receiver 50 receives the abnormality signal, the fire receiver 50 displays on the panel that there is an abnormality in the flowing water detection device 1 and issues an abnormality alarm.
Embodiment 2 of the present invention
A pressure switch 30 provided in the flowing water detection device 1 according to Embodiment 2 of the present invention will be described with reference to FIG. In the second embodiment, differences from the first embodiment will be described in detail, and members and configurations corresponding to the first embodiment are denoted by the same reference numerals and description thereof is omitted. Furthermore, since the whole structure of the fire extinguishing equipment 100 is the same as that of the above-described Embodiment 1, it is omitted.

  The flowing water detection device 1 includes a pressure switch 30.

The pressure switch 30 has a first contact 32 for outputting an abnormal signal with a first threshold and a second contact 34 for outputting a running water signal with a second threshold. That is, the pressure switch 30 has two contact mechanisms in one housing. The first contact 32 operates in the same manner as the first pressure switch 18 according to the first embodiment of the present invention, and the second contact 34 is the same as the second pressure switch 19 according to the first embodiment of the present invention. To work. That is, the second contact 34 operates at a higher pressure than the first contact 32, and only the first contact 32 operates in the case of water leakage, and the first contact 32 and the second contact in the event of a fire. 34 is activated. As a result, the fire receiver 50 issues an abnormality alarm or a running water alarm.
[Effects of the flowing water detection device 1 and the fire extinguishing equipment 100]
Since the flowing water detection apparatus 1 according to the present invention outputs an abnormal signal with a first threshold value lower than the second threshold value for outputting a flowing water signal in the event of a fire, foreign matter is generated between the valve body 5 and the valve seat 7. It is possible to discriminate between an abnormality such as when the valve body is partially opened and a fire when the valve body is opened.

  Moreover, since the fire extinguishing equipment 100 according to the present invention stops the abnormality alarm when the fire receiver 50 is performing an abnormality alarm and further receives a running water signal, it clearly distinguishes between an abnormality time and a fire time. can do.

DESCRIPTION OF SYMBOLS 1 Flowing water detection apparatus, 2 Main body, 3 Flowing water detection part, 5 Valve body, 7 Valve seat, 7a Drain port, 11 Drain pipe, 13 Branch pipe, 15 Auto drip, 17 Delay device, 18 1st pressure switch, 19 1st 2 pressure switch, 20 inlet, 21 outlet, 22 sprinkler head, 24 secondary side piping, 26 primary side piping, 30 pressure switch, 32 first contact, 34 second contact, 40 water tank, 42 fire extinguishing agent Tank, 44 Mixer, 50 Fire receiver, 100 Fire extinguishing equipment.

Claims (6)

Closed during monitoring, and opened in the event of a fire when the pressure in the secondary side pipe becomes lower than the pressure in the primary side pipe, the valve seat on which the valve body is seated, and drainage from the valve seat A connection pipe connected to the pipe, an auto drip provided in the connection pipe, a branch pipe branched from the connection pipe on the primary side of the auto drip, and a pressure connected to the branch pipe to detect the pressure in the connection pipe in water flow detection device comprising a pressure switch you, the,
The pressure switch includes a first contact for detecting a pressure increase due to water leakage between the valve body and the valve seat, and a first contact for detecting a pressure increase due to the valve body opening in the event of a fire . Two contacts,
The flowing water detection device characterized in that the first contact operates at a lower pressure than the second contact.
The pressure switch comprises a first pressure switch and a second pressure switch;
The water flow detection device according to claim 1, wherein the first pressure switch has the first contact, and the second pressure switch has the second contact.
  The flowing water detection device according to claim 1 or 2, wherein when the first contact is operated, an abnormal signal is output, and when the second contact is operated, a flowing water signal is output.   The flowing water detection device according to claim 3, wherein when the flowing water signal is output, the output of the abnormal signal is stopped. In a fire fighting facility having a water flow detection device having a pressure switch for detecting the flow of fire water when the valve body is opened by pressure, and a fire receiver connected to the water flow detection device by a signal line,
The pressure switch has a first contact the valve body for outputting an abnormality signal operates when water leak between the valve seat seated operates at higher pressure than the contacts of the first, the valve and a second contact for outputting a running water signal was activated when the body is opened at the time of a fire,
A fire extinguishing system, wherein the fire receiver issues an abnormal alarm when receiving the abnormal signal, stops the abnormal alarm when receiving the running water signal, and issues a running water alarm.
In a fire fighting facility having a water flow detection device having a pressure switch for detecting the flow of fire water when the valve body is opened by pressure, and a fire receiver connected to the water flow detection device by a signal line,
The pressure switch is actuated and the first contact for outputting a first signal in operation when water leakage, with high pressure from the contact of the first between the valve seat which the valve body is seated, and a second contact for outputting a second signal in operation when the valve body is opened at the time of a fire,
The fire receiver issues an alarm when receiving either the first signal or the second signal, and issues a running water alarm when receiving both the first signal and the second signal. Fire extinguishing equipment characterized by