JPH06142225A - Sprinkler fire-extinguishing equipment and running water detection device - Google Patents

Abstract

PURPOSE:To eliminate alarming mistake, simplify structure, and improve reliability by forming a preliminary action sprinkler fireextinguishing facility of a wet type, preventing an alarm from being issued only by basing on actuation of a fire sensor, and employing a check type valve body in a main body of a running water detection device. CONSTITUTION:In a sprinkler fire-extinguishing facility, water is filled on the secondary side B of a running water detection device, water on the primary side A flows to the secondary side B in a small quantity normally, a valve body 2 of a running water detection device starts preparation for releasing basing on a signal from a fire sensor K, and the valve body is completely released by subsequent actuation of a sprinkler head S, when a pressure switch 16 for alarming actuation is actuated to generate an alarm. In the running water detection device, a lock device 13 for stopping a check type valve body 2 is installed in a main body 1, a small play is provided between the lock device and the valve body, and a signal water intake port is installed on a valve seat which the valve body closes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler extinguishing system for sprinkler extinguishing by spraying water from a sprinkler head when a fire occurs, and a running water detecting device used for the sprinkler extinguishing system.

[0002]

2. Description of the Related Art Sprinkler fire extinguishing equipment includes dry type and wet type. In the dry type sprinkler fire extinguishing equipment, water always comes to the primary side (water source side) of the water flow detection device, but compressed air is filled in the secondary side pipe to which the sprinkler head is attached. Generally, a dry type sprinkler fire extinguisher is an anti-freezing fire extinguisher used in cold regions where the cold is severe in winter. In other words, in cold regions, if water is present in the piping of a sprinkler fire extinguisher installed in the ceiling, it freezes in winter and expands, causing the piping to burst or destroying the sprinkler head attached to the piping. . Therefore, in cold regions, a dry sprinkler fire extinguishing system that does not fill the secondary side is installed.

In the dry type sprinkler fire extinguishing equipment, when a fire occurs, the valve body of the water flow detection device opens due to the opening of the sprinkler head, and when water enters the secondary side, it reaches the sprinkler head that has operated through the pipe, Water is sprinkled from there. However, the dry-type sprinkler fire extinguishing system has a drawback in that the initial fire extinguishing is delayed because it takes time for the water to reach the sprinkler head operated from the water flow detecting device through the pipe.

Since the wet side sprinkler fire extinguishing equipment cannot be used in cold regions because the primary and secondary sides of the water flow detection device are filled with water from normal times, it is sprayed immediately by opening the sprinkler head. It has the feature that it is effective for initial fire extinguishing. That is, in the wet type sprinkler fire extinguishing equipment, the pump of the water source on the primary side operates at the same time as the valve body of the water flow detection device opens, and the pumped-up water is immediately transmitted to the water in the piping on the secondary side. Water with a certain amount of water is sprinkled from the sprinkler head to allow early extinguishing.

By the way, in a general sprinkler fire extinguishing facility, regardless of whether it is a dry type or a wet type, only the sprinkler head is attached to the ceiling surface, and water is always sprinkled when the sprinkler head operates. This sprinkler head is designed to open the valve body held in the disassembled part and spray water when the disassembled part installed in the sprinkler head is decomposed due to an abnormally high temperature of fire, but a fire does not occur. In both cases, the so-called "irrelevant watering" in which the decomposed part is destroyed and water is sprinkled due to external impact, that is, when an object is hit from the outside, may occur.

When the sprinkler head causes untimely watering or a water leak from a pipe, expensive furnishings such as computers, facsimiles, copiers and other office machines, furniture, rugs, etc. It will cause important documents to get wet and cause serious water loss.

For this reason, recently, a pre-operated sprinkler fire extinguishing system in which water is not sprinkled even if only the sprinkler head operates has been used. Pre-activated sprinkler fire extinguishing equipment is a fire source such as a heat detector or smoke detector installed near the sprinkler head mounting part, and the pump for the water source is not activated until both the sprinkler head and the detector are activated. Is operated to send water into the pipe with the sprinkler head attached, and water is sprinkled from the activated sprinkler head.

The pre-actuated sprinkler fire extinguishing equipment is classified into dry type and wet type, and in the past, dry pre-operated sprinkler fire extinguishing equipment which is easy to manage has been often used. However, the dry pre-actuated sprinkler fire extinguishing system not only has a problem in the initial fire extinguishing as described above, but also the flame of the fire is extinguished when the compressed air filled in the pipe comes out from the activated sprinkler head, There was also a serious problem of making the fire bigger. Therefore, recently, a wet type pre-actuated sprinkler fire extinguishing system which can quickly extinguish an initial fire and which does not increase the fire has come to be used outside the cold region.

[0009]

In a conventional wet type pre-actuated sprinkler fire extinguishing system, when an electric signal is sent from a fire detector that operates earlier than the sprinkler head when a fire occurs, this signal is sent. Completely open the valve body of the water flow detection device to keep the primary side and the secondary side in a circulating state, and be ready to feed water immediately when the sprinkler head is activated next time. This has the advantage that water can be sprayed quickly from the sprinkler head, but the valve of the water flow detection device is opened only by the signal from the fire detector, and the alarm device is activated when the valve is opened. The alarm was given before the sprinkler head was activated.

However, the fire detector may give a false alarm that it operates even if a fire does not actually occur. For example, if a heat sensor is installed on the heater in the room or on the stove in the kitchen, it can be activated by these hot air, or the smoke sensor can detect cigarette smoke or scorched smoke of cooking. It will give false alarms.

Whenever the fire detector gives a false alarm and the valve is opened and the sprinkler fire extinguishing equipment gives an alarm, the fire engine is dispatched if the alarm is open to the fire station, and the alarm is sent to the guard room. If you are informed of the situation, security personnel will call the fire department and rush to a place where the fire is likely to occur.

Further, since the flowing water detecting device used in the conventional wet type pre-operated sprinkler fire extinguishing system is of the piston type in which the valve body slides on the cylinder, the pressure loss is large and the structure is complicated. .

[0013]

DISCLOSURE OF THE INVENTION The inventors of the present invention use, in a wet type pre-actuated sprinkler fire extinguishing equipment, to prevent an alarm from being issued from a water flow detecting device even if only a fire detector operates. The present invention has been completed by earnestly researching a flowing water detecting device having a simple structure by reducing the pressure loss of the flowing water detecting device.

According to the present invention, a water supply pipe communicating with a water source is connected to the primary side of the flowing water detection device, and a pipe having a large number of sprinkler heads is connected to the secondary side thereof, and the sprinkler head is connected to the pipe. There is a fire detector installed near, and the pipes with the sprinkler heads on the primary and secondary sides are filled with water. A small amount of water can be passed through the valve, and the valve body of the water flow detection device is prepared to be opened by an electric signal from the fire detector. The sprinkler fire extinguishing system is characterized in that the pressure switch for operation alarm connected to the water flow detection device is activated next time to issue an alarm. Is provided with a check-type valve body that is divided into a primary side and a secondary side, and a lock device that prevents the valve body from opening during normal times is installed near the valve body, and the valve body and the lock device are also provided. The locking part has a play that allows a small amount of water to pass through when the valve body is closed, and there is a signal water intake port near the valve seat or the valve seat. The signal water intake is a running water detection device characterized in that it is connected to a pressure switch for actuation alarm installed outside the main body.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of the sprinkler fire extinguishing equipment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a flowing water detection device used in the sprinkler fire extinguishing equipment of the present invention.

The inside of the main body 1 of the flowing water detection device is divided into a primary side A and a secondary side B by a valve body 2. A water supply pipe 3 is connected to the primary side A, the end of the water supply pipe is immersed in the water of a water source 4, and a stop valve 5 and a pump 6 are connected in the middle thereof. Further, in the water supply pipe 3, a pressure tank 7 and a pressure switch 8 are provided between the pump 6 and the body 1 of the flowing water detection device.
Is installed.

A pipe 9 extending to the indoor ceiling is connected to the secondary side B of the water flow detecting device, and a large number of sprinkler heads S ... Are attached to the pipe. An end testing device 10 having the same diameter as the sprinkler head S is connected to the end of the pipe 9. The terminal test device is a device for testing the function of each part of the sprinkler fire extinguishing equipment by letting out the same amount of water as the water sprinkled by the sprinkler head. In the sprinkler fire extinguishing equipment of the present invention, in normal times, not only the primary side of the flowing water detection device but also the secondary side and the secondary side pipe 9 are filled with water.

A fire detector K is attached near the sprinkler head S. The fire detector is a heat detector, smoke detector, or the like, and is attached to one of the plurality of sprinkler head groups. The wiring 11 of the fire detector K is connected to the control panel 12.

The valve body 2 installed in the main body 1 of the water flow detection device is locked by the locking device 13 in normal times, but the water on the primary side A can be gradually passed to the secondary side B. Use the structure. The lock device is a fire detector K
When an abnormality is detected, the valve body 2 is unlocked, and the valve body is ready to be opened at any time as in the conventional wet type sprinkler fire extinguishing equipment.

Further, the flowing water detecting device does not operate at all when a small amount of water on the primary side A flows out to the secondary side B, but when the large amount of water flows out, it issues an alarm.

The flowing water detecting device of another invention is a main body 1
A valve body 2 is installed therein, and the inside of the main body is divided into a primary side A and a secondary side B by the valve body. The valve body 2 is of a check type, one end of which is rotatably attached to the secondary side of the main body so as to open and close the valve seat 14 on the primary side.

A signal water intake port 15 is formed in the valve seat 14, and the signal water intake port is closed by the valve body when the valve body 2 closes the valve seat 14. The signal water intake port may be formed in the valve seat, or may be formed near the valve seat. The signal water intake port 15 communicates with the outside of the main body 1, and a pipe is used to activate the alarm pressure switch 1
It is connected with 6.

Inside the main body 1, a lock device 13 is installed on the side opposite to the valve body mounting portion. The lock device 13 has a substantially V shape and is rotatably attached to the main body 1 at a position slightly lower than the center.

The lock device 13 is provided with a step portion 17 for locking the end portion of the valve body when the valve body 2 closes the valve seat 14. The stepped portion has a play T, that is, a small gap with the upper surface of the valve body when the valve body 2 closes the valve seat 14. Therefore, the valve body is the step portion 1 of the lock device 13.
When it is opened until it hits 7, the water on the primary side A gradually flows into the secondary side B from this slightly opened gap.

Below the main body 1 on the side where the locking device is installed, a screw 18 for adjusting the position of the lower end of the locking device to adjust the locked state of the step portion 17 and the valve body is screwed. There is. In addition, a torsion spring 19 is installed on the shaft of the mounting portion of the lock device, which constantly applies a force that pushes the upper end of the lock device toward the wall surface of the main body.

A push rod 20 which can freely move in and out from the outside of the main body 1 is in contact with the upper end of the lock device. The push rod 20 is fixed to a piston 22 in a chamber 21 installed outside the main body 1.

Holes are formed in the chamber 21 at two locations, and pipes 23 and 24 are connected to the holes. One pipe 23 communicates with the primary side A of the main body 1, and an orifice 25 is installed in the middle thereof. The pipe 23 introduces the pressure water on the primary side into the chamber 21, and the pressure water presses the piston 22 toward the main body in normal times. That is, when the piston 22 is on the main body side, the push rod 20 fixed to the piston is locked by the lock device 13.
Therefore, the valve body 2 cannot be opened above the stepped portion 17 of the lock device 13 by pushing the upper end of the lock element 13 inward. Pipe 23
The orifice 25 installed in the middle of the chamber makes the inflow amount of water into the chamber 21 smaller than the outflow amount from the solenoid valve described later, and when the solenoid valve is opened, the water pressure in the chamber is reduced to move the piston outward. To move to.

On the other pipe 24, a pressure gauge 26 is installed in the middle of the pipe, and the end of the pipe is divided into two parts, which are connected to a manual valve 27 and a solenoid valve 28, respectively.

On the secondary side of the main body 1, a hole communicating with the outside is bored, and is connected to the decompression notification pressure switch 29 by a pipe. When the sprinkler fire extinguishing equipment accidentally discharges water, the pressure on the secondary side of the water flow detection device suddenly drops, and this pressure reduction reporting pressure switch senses this and reports.

The wiring 30 of the pressure switch 16 for operation alarm,
The wiring 31 of the solenoid valve 28, the wiring 32 of the pressure reducing notification pressure switch 29, the wiring 33 of the pressure switch 8 and the wiring 34 of the pump 6 are all connected to the control panel 12.

Next, a description will be given of the state of the sprinkler fire extinguishing equipment of the present invention when a fire occurs and during normal times.

When a fire occurs, a fire detector K attached near the fire occurrence site detects it and sends an electrical signal to the control panel 12. The control panel 12 further transmits this signal to the solenoid valve 28 to open the closed solenoid valve. When the solenoid valve 28 is opened, the water in the chamber 21 flows outward from the solenoid valve 28, and the pressure inside the chamber is reduced. Then, the piston 22 pushed by the water pressure on the primary side moves outward, and the push rod 20 also moves accordingly, so that the upper end of the lock device is pulled back toward the wall surface of the main body by the spring 19 and the lock device 13 is closed. You will come to unlock the 2 lock.

When the sprinkler head S operates due to an abnormally high temperature of a fire, water on the secondary side B flows out from the operated sprinkler head, so that the pressure on the secondary side decreases. Then, since the lock device 13 is already in the released state, the water on the primary side A pushes the valve body 2 open and flows into the secondary side B. When the valve body 2 is opened, the pressure on the primary side A is reduced, the pressure switch 8 is activated, a signal is sent from the control panel 12 to the pump 6, and the pump is started.

When the valve body 2 is opened, the water pressurized by the pump 6 flows in the main body, so the signal water intake port 1
A large amount of pressurized water flows in from 5, and this water activates the pressure switch 16 for operation alarm. The electric signal of the pressure switch for operation alarm is sent to the control panel 12, and from there, it is sent to the fire department or the guard room to issue an alarm such as a siren or buzzer. That is, in the sprinkler fire extinguishing equipment of the present invention, the alarm is not issued unless the valve body is completely opened.

Next, the normal state of the sprinkler fire extinguishing equipment of the present invention will be described. During normal times of the sprinkler fire extinguishing equipment of the present invention, the primary side A and secondary side B of the water flow detection device
And the pipe 9 connected to the secondary side is filled with water. In this state, the water pressure on the primary side A and the water pressure on the secondary side B are almost the same, but the water pushing area on the upper surface (secondary side) of the valve body is larger than the water pushing area on the lower surface (primary side). The valve body 2 closes the valve seat 14 due to this pressure difference. Further, due to the gravity of the valve body, the valve body 2 closes the valve seat 14 and the signal water intake port 15. At this time, the solenoid valve 28 is closed.

In sprinkler fire extinguishing equipment, although it rarely occurs, when water leaks little by little from the joint or end of the pipe, the water pressure on the secondary side B decreases, Since there is a play T between the lock devices 13, the valve body is opened by this play to allow water to flow into the secondary side. However, since the valve body opens only slightly,
A small amount of water flows into the signal water intake port 15, and the operation alarm pressure switch 16 is not operated.

In the case of an accidental water discharge accident in which the sprinkler head is hit by an object and the decomposed part is destroyed and water flows out from the sprinkler head, the water on the secondary side flows out from the sprinkler head. Therefore, the pressure drops sharply, but since the fire detector is not operating, no electrical signal is emitted from the fire detector.

Therefore, no signal is sent from the control panel 12 to the solenoid valve 28, and the solenoid valve 28 does not open. If the solenoid valve is not opened, the water in the chamber 21 will not flow out and the lock device 13
Does not move, so the valve body 2 cannot be opened. However, the water on the secondary side flows out of the sprinkler head, which is discharged accidentally, and the pressure drops extremely. Even with this, the valve body does not open, so that the water on the primary side gradually flows into the secondary side through the gap that is slightly opened due to the play of the valve body. Also at this time, the valve body opens only slightly, so the signal water intake port 15
Only a small amount of water can flow into the pressure switch for activation alarm 1
Do not activate 6. Even if the sprinkler head accidentally discharges water, the valve body will not be opened, so there will be very little water outflow from the sprinkler head, and there will be almost no water damage accidents.

[0039]

As described above, the sprinkler fire extinguishing system of the present invention is a wet type, but even if the fire detector operates, the water flow detection device does not operate. Therefore, the fire detector alone does not give an alarm. Even if leakage from the secondary side pipe or unscheduled water discharge of the sprinkler head occurs, the water on the primary side flows into the secondary side only in a small amount, so that the water loss is extremely small, and the running water detection device of the present invention is also present. Uses a check-type valve that has never been used in a wet pre-actuated sprinkler fire extinguishing system, so it opens and closes smoothly, and in normal times, the valve body is locked with a small amount of play by a locking device, In the flow of water, the pressure switch for operation alarm installed outside is not activated and the lock device is not released, so the alarm is not issued even if there is a false alarm from the fire detector. Those were.

[Brief description of drawings]

FIG. 1 is a schematic view of a sprinkler fire extinguishing facility of the present invention.

FIG. 2 is an enlarged cross-sectional view of a flowing water detection device of the present invention.

[Explanation of symbols]

 1 Water flow detector main body 2 Valve body 3 Water supply pipe 9 Secondary side pipe 12 Control panel 13 Lock device 14 Valve seat 15 Signal water intake 16 Pressure switch for operation alarm 17 Step section 20 Push rod 28 Solenoid valve S Sprinkler head K Fire sensor

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[Procedure amendment]

[Submission date] December 10, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Title of invention

[Correction method] Change

[Correction content]

Patent application title: Sprinkler fire extinguishing equipment and running water detection device

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

[0013]

DISCLOSURE OF THE INVENTION In the wet type pre-actuated sprinkler fire extinguishing equipment, the present inventor prevents the running water detection device from issuing an alarm even when only the fire detector is activated, and the running water used for this purpose. The present invention has been completed by earnestly conducting research on how to reduce the pressure loss and the simple structure of the detection device.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction content]

Next, the state of the sprinkler fire extinguishing equipment of the present invention during and after a fire will be described.

Claims (2)

[Claims] 1. A water supply pipe communicating with a water source is connected to the primary side of the flowing water detection device, and a pipe having a large number of sprinkler heads is connected to the secondary side thereof, and the vicinity of the sprinkler head. Is equipped with a fire detector, and the piping with the sprinkler heads on the primary and secondary sides is filled with water. The valve body of the water flow detection device is ready for opening with an electrical signal from the fire detector, and the sprinkler head discharges water flow from the primary side to the secondary side to open the valve body. The sprinkler fire extinguisher system is characterized in that the pressure switch for actuation alarm connected to the running water detection device is activated next time to issue an alarm. 2. A check valve body, which is divided into a primary side and a secondary side, is installed in the main body, and a locking device for preventing the opening of the normal time valve body is installed in the vicinity of the valve body. In addition, the valve element and the locking part of the locking device have play that allows a small amount of water to pass through when the valve element is closed, and there is no signal near the valve seat or near the valve seat. A flowing water detecting device, characterized in that there is a water intake port, and the signal water intake port is connected to a pressure switch for operation alarm installed outside the main body.