JP3205883B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler fire extinguishing system.

[0002]

2. Description of the Related Art Sprinkler fire extinguishing systems have conventionally used various system systems such as a wet type, a dry type, and a pre-operation type.

[0003] In a conventional most common wet-type fire extinguishing system using a closed sprinkler head, pressurized water is always filled up to the end of a closed sprinkler head provided in each caution area, and water is sprayed simultaneously with detection of a fire. This is the most common equipment that can operate and is used for buildings and the like.

In a closed-type sprinkler fire extinguishing system, since pressurized water is always filled up to the end of a pipe, a large amount of pressurized fire extinguishing water is released when the sprinkler head is opened due to an accident such as being hit by an object. Until the pump stops after confirming that it is not a fire.
Watering is continued, resulting in a major water damage accident.

[0005] In the event of a fire, the same high-pressure fire extinguishing water as in the primary side flows into the secondary pipe provided with the sprinkler head by opening the release valve. For this reason, it is necessary to use secondary pipes, valves, and the like that can withstand high pressure equivalent to that of the primary side. This increases the cost of piping and valves on the secondary side, which hinders the spread of sprinkler fire extinguishing equipment.

[0006]

In order to solve such a problem of the conventional sprinkler fire extinguishing system, the fire extinguishing water at the pressure on the secondary side is discharged so that the fire extinguishing water can be discharged at a pressure which is effective for fire extinguishing together with the operation of the sprinkler head. Various facilities for constantly adjusting the pressure in a pipe to a predetermined pressure have been proposed.

[0007] However, when the pressure in the secondary pipe drops due to a temperature change, the pressure is adjusted to a predetermined pressure by the pressure regulating means, but when the pressure rises, it is necessary to drop it.
If the pressure exceeds a predetermined level, the pressure gauge may be destroyed, or high-pressure water may be discharged when water is discharged.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a security area,
A plurality of closed sprinkler heads and an open valve having a flowing water detection chamber are provided, a primary pipe of the open valve is connected to fire extinguishing water supply means, and a secondary pipe is connected to the sprinkler head. In the sprinkler fire extinguishing equipment where fire water is always filled with predetermined pressure in the side piping,
A switch that operates when the pressure of the secondary pipe is reduced and sends out an operation signal of the sprinkler head to the receiver is connected to the flowing water detection chamber of the opening valve, and water is sprayed when the sprinkler head is opened due to an impact or the like. A shut-off means for stopping is provided, and the shut-off means is constituted by a motor-operated valve which is normally open and closed by receiving a signal from the receiver. Further, in the above-described sprinkler fire extinguishing equipment, the opening valve is normally in a closed state and opens when the pressure in the secondary pipe is lower than a predetermined pressure. And a cylinder provided with a piston that is interlocked with the valve body and is connected to the valve body. The electric valve of the shut-off means is provided in the pipe and closed so as to quickly close the open valve. Things.

Further, the sprinkler fire extinguishing equipment according to the present invention is provided with a plurality of closed-type sprinkler heads and an opening valve in a guard area, and a primary pipe of the opening valve is connected to a fire extinguishing water supply means on a secondary side. In a sprinkler fire extinguishing system in which pipes are respectively connected to the sprinkler heads and the secondary side pipes are always filled with fire extinguishing water at a predetermined pressure, the sprinkler head is opened to the release valve, and the secondary side pipes are opened. A switch that operates to transmit the operation signal of the sprinkler head to the receiving panel by operating when the pressure is reduced, and an electric valve that is normally open is provided in the primary pipe or the secondary pipe to open the sprinkler head. Is not a fire detected, in the case of malfunction due to impact or the like, the receiver sends a closing signal, the motorized valve,
It is closed in response to the closing signal and closes the flow path of the fire extinguishing water to the secondary pipe.

[0010]

[Function] In the secondary pipe filled with water to a predetermined pressure which is efficient for fire extinguishing activities, the action of the pressure regulating means always causes the high pressure primary pressure to be introduced when the pressure is lower than the predetermined pressure. Is done. When the pressure in the secondary pipe increases due to a temperature rise or the like, the drain of the drain valve is opened and drained by the action of the drainage means, and the pressure is reduced to a predetermined pressure.
The valve body of the drain valve is closed, and the inside of the secondary pipe is maintained at a predetermined pressure. If the sprinkler head does not detect a fire but malfunctions due to impact or the like, the flow of fire extinguishing water to the secondary pipe is rapidly closed by the shutoff means.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a sprinkler fire extinguishing system utilizing the present invention.

A closed type sprinkler head 1 provided on the ceiling of the security area is connected to a secondary side 4 of an opening valve 3 installed on each floor of the building via a secondary pipe 2, and the opening valve 3 is opened. The primary side 5 is connected to a pressurized water supply device 8 as fire extinguishing water supply means via a primary side pipe 6 and a main valve 7. The pressurized water supply device 8 includes a pump 9 shown in FIG.
In addition, a normal check valve, a pressurized air tank, and the like (not shown) are provided to pressurize and supply fire extinguishing water from the water source 12.

The opening valve 3, which is normally closed and opened when the pressure in the secondary pipe 2 is reduced, includes a test means 20 for testing the flow of water to the secondary pipe 2, 6, pressure regulating means 30 for reducing the pressure of the fire extinguishing water to a predetermined pressure and supplying the same to the secondary pipe 2, a shutoff means 50 for rapidly closing the opening valve 3, and a pressure surplus in the secondary pipe 2. The drainage means 60 for draining water is formed as a unit 70, and a connection terminal 71 for connecting an electric path wired in the unit 70 to an external signal line is also provided in the unit 70.

The test means 20 includes a motor-operated remote control test valve 21 and a drain 1 for draining one sprinkler head 1.
An individual test valve 22 and a large test valve 23 for draining five sprinkler heads 1 and the like are provided. The primary side of these valves is provided in parallel with a pipe 24 branched from the secondary side pipe 2, and the secondary side is connected to a drain pipe 25.

The remote control test valve 21 can be remotely operated by a signal from the receiving panel 10, the opening valve 3 is opened by the pressure reduction in the secondary pipe 2, and the pressure switch 74 described later is operated. Can be confirmed. The one test valve 22 can discharge water for one head on the spot, the pressure state at that time can be confirmed by the pressure gauges 72 and 73, and the normal operation of the opening valve 3 can be confirmed. The large test valve 23 can discharge a larger amount of fire extinguishing water than the single test valve 22, and can confirm the supply capacity when multiple heads are simultaneously opened. In addition, it can be confirmed that the pressure in the secondary pipe 2 is regulated even when the amount of discharged water changes. These valves have different purposes and functions, and the testing means 20 only needs to be provided with necessary valves in accordance with the purpose to be tested, and may be configured to be used in common.

The pressure regulating means 30 introduces the secondary pressure of the secondary pipe 2 into the operation chamber 32 through the pipe 31, takes in the primary pressure from the pipe 33 from the primary side 5 of the opening valve 3, and
The pressure control valve 40 controls the opening degree of the valve body 36 by the pressure control of the spring 4 and the spring 35, and introduces the primary pressure to the cylinder 38 of the opening valve 3 through the pipe 37.

The pressure regulating valve 40 has a function of opening the opening valve 3 in the event of a fire. That is, when the pressure in the secondary pipe 2 introduced into the operation chamber 32 through the pipe 31 is lower than a predetermined pressure, the valve body 36 is opened by the pressure regulating action of the flam 34 and the spring 35, and the pipe 33 is opened. , 37, the primary pressure is gradually introduced into the cylinder 38, the piston 41 is pushed up (to the left in the drawing), and the associated valve element 43 is opened. When the pressure in the secondary pipe 2 is higher than a predetermined pressure, the valve body 36 closes due to the pressure regulating action of the flam 34 and the spring 35, the primary pressure inflow decreases, and the pressure in the cylinder 38 is reduced. As a result, the piston 41 moves down (to the right in the drawing), and the valve element 43 that operates in conjunction with the piston 41 closes.

The opening degree of the opening valve 3 is adjusted in this manner, and the secondary pressure is adjusted to a predetermined pressure suitable for the fire extinguishing operation, for example, 3.5 kg / cm ² nearest to the secondary side. The cylinder 38 of the opening valve 3 is connected to the secondary pipe 2 by a pipe 44 via a small hole 42 of a piston 41. As a result, the pressure in the secondary pipe 2 is increased when the pressure regulating valve 40 is opened, so that the pressure is constantly maintained at a predetermined pressure by the pressure regulating action of the pressure regulating valve 40.
A small amount of primary pressure replenishment is performed when the pressure drops due to a temperature change in the secondary pipe 2 or the like. At this time, the opening valve 3 does not open and there is no opening signal. At the same time, the pressure flows into the back surface of the piston 41 and the sliding of the valve body 43 becomes slow, so that there is an effect that the pressure adjusting operation is easily performed.

Therefore, when the sprinkler head 1 is opened due to the occurrence of a fire, it is possible to immediately discharge water at a predetermined pressure suitable for fire-extinguishing activities.
The opening valve 3 is opened by the action of the pressure regulating valve 40, and the valve body 4
By adjusting the opening of 3, the secondary pipe 2 is
Fire fighting water of a predetermined pressure suitable for fire fighting is supplied.

The shut-off means 50 is for stopping water sprinkling when the sprinkler head 1 is opened due to an impact or the like. Specifically, a pipe connecting the pressure regulating valve 40 to the cylinder 38 of the opening valve 3 is provided. The motor-operated valve 51 provided at 37 is in a normally open state. This electric valve 51 is
A signal from the receiver 10 is received by an electric unit 52 composed of a motor or the like, and the operation of the electric unit 52 causes the valve 5 to operate.
1 can be closed. That is, when the sprinkler head 1 malfunctions, the closing signal can be sent to the electric unit 52 via the receiving board 10 by operating the water discharge stop switch 53 provided in the monitoring area.
The motor 52 receives the signal and closes the valve 51. As a result, the pressure in the cylinder 38 is reduced through the small hole 42.
The opening valve 3 is closed.

The position of the motor-operated valve 51 does not need to be interposed in the pipe 37, and may be another position as long as the pressurization of the cylinder 38 can be cut off. When a so-called pressure-reducing valve is used as the opening valve 3, the motor-operated valve naturally shuts off the pressure in the cylinder.

Further, the position of the motor-operated valve is determined by the position of the valve body 4 of the opening valve 3.
Irrespective of the opening and closing of the valve 3, the valve 3 may be directly interposed in the primary pipe 6 or the secondary pipe 2. For example, the same effect can be obtained even if the main valve 7 is constituted by an electric valve.

The drainage means 60 is provided in the pipe 24 branched from the secondary pipe 2 in parallel with the test means 20, and comprises a drainage valve 61 connected to the drainage pipe 25. The drain valve 61 is a valve body when the secondary pressure introduced from the pipe 24 into the operation room 62 exceeds an allowable pressure set by the flam 63 and the spring 64 (a pressure slightly exceeding a predetermined pressure suitable for fire extinguishing activities). 65 is opened and excess secondary pressure is discharged to drain pipe 2
5 and maintain the secondary pressure at a pressure suitable for a predetermined fire fighting activity. Therefore, even if the pressure in the secondary side pipe 2 is greatly increased due to a temperature rise or other factors, the drain valve 61
Detects excessive secondary pressure and reduces the secondary pressure to a predetermined pressure. The drain valve 61 is a valve that is opened by the action of the spring 64 or the like, but may be a valve that electrically opens the secondary pressure.

In the unit 70, a pressure gauge 72 for measuring the secondary pressure is connected to the pipe 24, and a pressure gauge 73 for measuring the primary pressure is connected to the pipe 33. A pressure switch 74 for detecting the opening of the opening valve 3 is formed on the valve seat 75 of the opening valve 3, and the valve body 4 is closed when the valve body 43 is closed.
Branch pipe 7 from running water detection chamber 76 closed by 3
7 is connected. The branch pipe 77 is connected to the drain pipe 25 via an orifice 78, and when the opening valve 3 is closed, the fire extinguishing water that operates the pressure switch 74 is gradually drained.

Next, the operation of this embodiment will be described. The secondary pipe 2 to which the plurality of sprinkler heads 1 are connected is filled with fire extinguishing water at a predetermined pressure suitable for fire extinguishing activities. Here, when the pressure in the secondary pipe 2 is slightly reduced due to a temperature drop or the like, the fire-extinguishing water in the primary pipe 6 is discharged through the pipes 33 and 37 and the cylinder 38 by the action of the pressure regulating valve 40 to the secondary side. The pipe 2 is filled with water, and the pressure in the secondary pipe 2 is increased to a predetermined pressure. Further, when the pressure inside the secondary side pipe 2 is excessively increased due to temperature rise or the like, the drain valve 61 is operated, the valve body 65 is opened, and the fire extinguishing water on the secondary side is discharged to the drain pipe 2.
5, and the secondary pressure is reduced to a predetermined pressure.

In this state, when a fire occurs, the sprinkler head 1 is opened, and the discharge of fire-extinguishing water in the secondary pipe 2 is started. When the discharge of water from the head 1 is started, the pressure regulating valve 40 detects a decrease in the secondary pressure, opens the valve body 36, introduces fire-extinguishing water in the primary side pipe 6 into the cylinder 38, and opens the valve of the opening valve 3. The body 43 is opened. When the valve element 43 is opened, the fire extinguishing water on the primary side 5 is supplied to the secondary side 4, and at the same time, the fire extinguishing water flows into the flowing water detection chamber 76, and the pressure switch 74 operates,
An operation signal of the head 1 is transmitted to the receiver 10.

The pressure regulating valve 40 not only opens the opening valve 3 but also adjusts the opening of the valve body 36 by introducing a secondary pressure into the operation chamber 32, and is introduced into the cylinder 38 of the opening valve 3. By adjusting the primary pressure, the opening degree of the valve body 43 is adjusted to perform a pressure adjusting operation so that the inside of the secondary pipe 2 has a predetermined pressure suitable for fire extinguishing activities.

When the fire-extinguishing water in the primary pipe 6 flows out by opening the opening valve 3, a pressure switch provided in a pressure air tank (not shown) constituting the pressurized water supply device 8 is operated, and the motor is operated. 11, the pump 9 is operated, and the fire extinguishing water of the water source 12 is supplied under pressure. Accordingly, the sprinkler head 1 that has been opened is supplied with fire-extinguishing water having a predetermined pressure suitable for fire-extinguishing activity one after another through the opening valve 3 controlled by the pressure regulating means 30, and can continue to effectively discharge water.

There is no problem if the opening of the sprinkler head 1 has detected a fire, but in the case of a malfunction due to an impact or the like, it is necessary to stop the water discharge soon. In that case, the water discharge stop switch 53 in the caution area is operated. When the water discharge stop switch 53 is operated, the receiver 1
A closing signal is sent to the motor unit 52 of the motor-operated valve 51 via the “0”. As a result, the electric valve 51 is closed, the supply of the primary pressure in the cylinder 38 is cut off, the pressure is reduced, and the valve element 43 of the opening valve 3 is closed. Then, the water supply from the primary side pipe 6 is shut off, so that the water discharge from the head 1 can be stopped.

As described above, in the system of this embodiment,
The pressure in the secondary pipe 2 can be set to a predetermined pressure suitable for fire extinguishing activities not only during a fire but also at all times. In the case of a malfunction of the sprinkler head 1, water discharge can be easily stopped. It is a useful fire extinguishing system. The opening valve 3 of this equipment can be a decompression opening valve.

[0031]

The sprinkler fire extinguishing equipment according to the present invention
A switch that operates when the pressure on the secondary pipe is reduced and sends a sprinkler head operation signal to the receiver is connected to the flowing water detection chamber of the opening valve, and shuts off watering when the sprinkler head is opened due to impact or the like. Is established,
The shut-off means is composed of a motor-operated valve that is normally open and closed by receiving a signal from the receiver, so that in the event of a malfunction of the sprinkler head, it is possible to easily stop water discharge and damage due to water damage. Can be kept to a minimum.

[Brief description of the drawings]

FIG. 1 is a system diagram showing one embodiment using the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed sprinkler head 2 Secondary side piping 3 Opening valve 6 Primary side piping 8 Pressurized water supply device (fire water supply means) 30 Pressure regulating means 40 Pressure regulating valve 50 Shutoff means 51 Electric valve 53 Water discharge stop switch 60 Drainage means 61 Drainage valve

Claims (3)

(57) [Claims] To 1. A warning area, and a plurality of closed sprinkler head, an open valve is provided with a water flow detection chamber, the primary side piping extinguishing water supply means of the open valve, the secondary side pipe the sprinkler is the head Niso respectively connected, the secondary
A spout filled with fire extinguishing water at a predetermined pressure
In the wrinkler fire extinguishing system, it operates when the secondary side piping is depressurized in the flowing water detection chamber
And send the operation signal of the sprinkler head to the receiver
Connect the switch and the sprinkler head
Shut off to stop watering when opened by impact, etc.
Means are provided, and the shut-off means is normally open, and
A motorized valve that closes in response to a signal
Sprinkler fire extinguishing equipment. 2. The open valve is normally closed.
Yes, when the pressure in the secondary piping is lower than the specified pressure
The valve body that operates and is connected to the primary side of the release valve via piping.
And a cylinder provided with a piston interlocked with the valve body.
Comprising a motor-operated valve of the interrupting means is provided in the pipe, closing of
That the opening valve is closed rapidly
The sprinkler fire extinguishing system according to claim 1, wherein 3. A plurality of closed sprinklers in a security area.
A head and an opening valve are provided, and a primary pipe of the opening valve is provided.
Is the fire extinguishing water supply means, and the secondary pipe is
Are always connected to the secondary side piping.
Sprinkler fire extinguishing equipment filled with fire water at a constant pressure
And By opening the sprinkler head to the release valve,
Works when the secondary side piping is depressurized and the sprinkler
Connecting a switch that sends the head operation signal
In the primary pipe or the secondary pipe, always open
The electric valve in The opening of the sprinkler head detected a fire.
No, the receiver is closed in case of malfunction due to impact etc.
Send out a signal, The motor-operated valve is closed upon receiving the closing signal, and the secondary
Characterized by closing the fire extinguishing water flow path to the side piping.
Purinkura fire extinguishing equipment.