JP3066581B2 - Sprinkler fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a sprinkler fire extinguishing system.

[0002]

2. Description of the Related Art Various systems such as a closed type, an open type, a closed type, a wet type, a dry type and the like are conventionally used for sprinkler fire extinguishing equipment. Conventionally, in the closed type sprinkler fire extinguishing equipment, the fire extinguishing fluid pressurized up to the end of the closed type sprinkler head provided in each warning area is always filled, and water spraying operation can be taken simultaneously with fire detection, This is the most common equipment used for buildings and the like.

In a closed type sprinkler fire extinguishing system, a large amount of fire extinguishing liquid is released due to breakage of the sprinkler head or the like. Therefore, a fire detector is installed in addition to the sprinkler head, and the fire detector operates due to a fire to reach the sprinkler head. There is a pre-action type (pre-action type) sprinkler fire extinguishing system that fills a fire extinguishing liquid and sprays water when the sprinkler head operates. In this pre-operation type, the air is slightly pressurized in the pipe to the sprinkler head, and the fire extinguishing liquid is not released when the sprinkler head is damaged or malfunctions. Therefore, it is installed in a place such as a department store where water damage other than at the time of fire is extremely disliked.

[0004]

In the closed-type sprinkler fire extinguishing system, the fire extinguishing solution pressurized up to the end of the pipe is always filled, so that the fire extinguishing solution can be discharged simultaneously with the operation of the sprinkler head by detecting the fire. There is a feature that there is. However, if the sprinkler head is opened due to an accident such as being hit by an object, the pressurized fire extinguishing liquid is released, the pressurizing device is started, and the pump is stopped after confirming that there is no fire Until the water is sprayed, there is a problem that the water loss continues.

On the other hand, a pre-actuated sprinkler fire extinguishing system
The fire extinguishing liquid is released only when the fire detector detects a fire and the closed sprinkler head operates, that is, the AND condition between the fire detector and the closed sprinkler head. Is merely filled with pressurized air, so that even if the closed type sprinkler head is opened due to an impact, a water damage accident does not occur.

However, a compressor or the like for pressurizing the secondary pipe to which the closed type sprinkler head is connected is required, so that the entire equipment becomes complicated and expensive. However, since pressurized air comes out, there is a problem that a delay occurs before the fire extinguishing liquid starts to be discharged normally.

The present invention has been proposed to solve such various problems of the conventional sprinkler fire extinguishing system, and the fire extinguishing liquid can be discharged together with the operation of the sprinkler head. The present invention provides an inexpensive sprinkler fire extinguishing system that can suppress a water damage accident even when the fire extinguishing device is opened due to an impact or the like, and has a simple structure.

[0008]

A sprinkler fire extinguishing system according to the present invention comprises a fire detector, a closed sprinkler head, a primary side and a secondary side which are always closed by a valve body. An opening valve for moving the valve element in an opening direction based on detection of a fire phenomenon and a decrease in the pressure on the secondary side, and a water passing means for introducing fire-extinguishing water from the primary side to the secondary side; And a pressure switch that outputs an abnormality signal for detecting a pressure drop on the secondary side and performing an abnormality alarm.

Further, a fire detector, a closed-type sprinkler head, and the normally closed state and the primary side and the secondary side, and an open valve which opens on the basis of the detection of a fire phenomenon of the fire detector, the primary And a pressure switch that outputs an abnormal signal for detecting a pressure drop on the secondary side and performing an abnormal alarm by detecting a pressure drop on the secondary side. In addition, the water supply means regulates fire extinguishing water on the secondary side.
It is characterized by being introduced under pressure.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram of Embodiment 1 of the sprinkler fire extinguishing equipment. A fire detector 1 of a differential type, a constant temperature type, or the like provided in a guard area is connected to a receiver 3 via an electric line 2.

A closed-type sprinkler head 4 provided on the ceiling of a security area as in the case of the fire detector 1 is connected to a secondary side 7 of an opening valve 6 through a secondary side pipe 5. Release valve 6
The primary side 8 is a pressurized liquid supply device 1 as a fire extinguishing liquid supply means.
3 and a gate valve 9 shown in FIG.
In addition to a pump 10, a motor 12 connected to the receiving board 3 by an electric circuit 11, and the like, the pressurized liquid sending device 13 includes a normal check valve, a pressurized air tank, and the like (not shown).

The primary side 8 and the secondary side 7 of the opening valve 6 are provided with double inner and outer valve seats 14a and 14b and these valve seats 1a and 1b.
4a and 14b are opened and closed by a valve body 15, and a signal water chamber 51 is formed by the valve seat 14a and the valve seat 14b.
An operation chamber 17 is formed by the valve box 16 and the valve element 15, and a part of the hydraulic pressure on the primary side 8 is introduced into the valve element 15 urged by the spring 18 to close the valve seat 14. Small hole 1
9 is open. The operation room 17 is connected to the receiving
Motor 21 such as a motor or solenoid connected to
To the operation valve 22 which is opened and closed.

An orifice 24 serving as a small flow device A is interposed in a bypass pipe 23 provided to bypass the primary side 8 and the secondary side 7 of the opening valve 6. In the pipe 25 connected to the signal water inlet chamber 51, the opening of the opening valve 6 is detected, and this is notified to the receiving board 3 through the electric circuit 26, and the receiving board 3
Switch 2 for activating pressurized liquid sending device 13 via
7 a is provided, and the pipe 25 and the secondary side of the operation valve 22 are connected to a drain pipe 29 via an orifice 28.

The secondary pipe 5 is also provided with a pressure switch 27b for outputting an abnormal signal to the receiving board 3 when the secondary pressure is abnormally reduced. The secondary pipe 5 to which the sprinkler head 4 is connected is connected to the drain pipe 3 through the gate valve 31.
2 connected. The hydraulic pressure of the primary side 8 of the opening valve 6 is detected by a pressure gauge 33, and the hydraulic pressure of the secondary pipe 5 is detected by a pressure gauge 34.

Next, the operation of the above embodiment will be described. In a normal state in which the fire detector 1 is not operated, the fire extinguishing liquid on the primary side 8, which is pressurized by the opening valve 6, enters the operation room 17 through the small hole 19, and is actuated by the hydraulic pressure of the fire extinguishing liquid and the spring 18.
Closes the valve seats 14a and 14b. And the primary side 8
The fire extinguishing fluid is charged from the bypass pipe 23 to the sprinkler head 4 and the secondary pipe 5 by the orifice 24, and the secondary 7 and the secondary pipe 5 and the sprinkler head 4 are set to the same hydraulic pressure as the primary side 8. It has been filled. In the case where a slight decrease in hydraulic pressure occurs due to natural decompression other than the opening of the sprinkler head 4 in the secondary pipe 5, the fire extinguishing liquid on the primary side 8 is supplied to the orifice by a pressurizing means such as a pressure air tank (not shown). The gas is supplied to the secondary pipe 5 through the pipe 24 and is maintained at a predetermined pressure.

In this state, when a fire occurs and the fire detector 1 operates, a fire signal is transmitted to the receiver 3. In the receiving panel 3, the electric section 21 is operated by the fire signal to open the operation valve 22, so that the hydraulic pressure in the operation chamber 17 of the release valve 6 is discharged from the drain pipe 29, and the hydraulic pressure in the operation chamber 17 is reduced. As a result, the release valve 6 can be opened, but the primary side 8 and the secondary side 7 have substantially the same pressure because the sprinkler head 4 is not opened, and the valve body 15 has its own weight and the spring 1.
8 keeps the valve seats 14a and 14b closed. Then, when the temperature at the fire point further rises, the sprinkler head 4 is opened and the fire extinguishing liquid in the secondary pipe 5 is immediately discharged.

The discharge of the fire extinguishing liquid in the secondary pipe 5 causes the hydraulic pressure on the secondary side 7 of the opening valve 6 to decrease, and the primary side 8 is pressurized by a pressurizing means such as a pressure air tank (not shown). The valve body 15 is separated from the valve seats 14a and 14b by the hydraulic pressure, and the release valve 6 is opened.
Is opened. Therefore, the pressurized fire extinguishing liquid on the primary side 8 is supplied to the secondary side 7 and also passed through the signal inlet chamber 51 to the pipe 2.
5, the pressure switch 27a operates to activate the pressurized liquid sending device 13, and the discharge of the fire extinguishing liquid is continued until the fire is extinguished. Here, the activation of the pressurized liquid sending device 13 may be performed by detecting a continuous pressurizing time of the pressurizing unit.

Sprinkler head 4 and secondary pipe 5
Since there is no air in the inside as in the conventional pre-actuated sprinkler fire extinguishing equipment, the fire extinguishing liquid is discharged simultaneously with the opening operation of the sprinkler head 4, and there is no delay in the fire extinguishing operation. Moreover, a compressor for constantly pressurizing the secondary pipe 5 with air is not required in the present invention, and the equipment cost is reduced.

On the other hand, when the sprinkler head 4 is opened due to a mechanical impact, the diameter of the orifice 24 is set sufficiently smaller than the opening diameter of the sprinkler head 4, so that the hydraulic pressure of the secondary pipe 5 is reduced. The pressure drops rapidly, and the pressure switch 27 b operates to transmit the pressure to the receiver 3. As a result, the fire detector 1 does not operate in the receiver 3 and the secondary pipe 5
Is detected, it is possible to indicate that an abnormality has occurred in the system of the secondary pipe 5 without opening the release valve 6.

At this time, the fire extinguishing liquid discharged from the sprinkler head 4 opened by the impact is supplied to the secondary pipe 5 only through the orifice 24, so that the amount of the supplied fire extinguishing liquid is small. It does not cause large water loss accidents like sprinkler fire fighting equipment.

Embodiment 2 FIG. FIG. 2 is a block diagram showing Embodiment 2 of the present invention. The second embodiment is different from the above-described embodiment in that the small flow rate liquid passage device A is constituted by a small hole 36 formed in a partition wall 35 that separates the primary side 8 and the secondary side 7 of the release valve 6. The components that are the same as those of the first embodiment, and can be used in common, are denoted by the same reference numerals, and the description of the structure is omitted. In a normal state in which the fire detector 1 is not operated, the fire extinguishing liquid on the primary side 8 is introduced into the secondary side 7 from the small hole 36 and is charged into the sprinkler head 4 through the secondary side pipe 5 and is the same as the primary side 8. When the sprinkler head 4 is charged to the hydraulic pressure of the above, and a slight decrease in the hydraulic pressure other than the opening of the sprinkler head 4 occurs in the secondary side piping 5, the fire extinguishing liquid on the primary side 8 passes through the small hole 36. To the secondary side pipe 5 and maintained at a predetermined pressure.

Therefore, in the second embodiment as well, since no air is interposed in the sprinkler head 4 and the secondary pipe 5 as in the conventional pre-actuated sprinkler fire extinguishing system, the opening operation of the sprinkler head 4 and At the same time, the fire extinguishing liquid is released, there is no delay in the fire extinguishing operation, and a compressor for constantly pressurizing the secondary pipe 5 with air is not required in the present invention, and the equipment cost is reduced in the first embodiment. In addition to having the same effect, the small flow rate flow device A can be obtained only by opening the small hole 38 in the partition 36 of the opening valve 6, and the equipment cost can be extremely low.

Embodiment 3 FIG. FIG. 3 is a block diagram showing Embodiment 3 of the present invention. In the third embodiment, as the small flow rate liquid passing device A, a pressure regulating valve 37 capable of adjusting the fluid pressure to a predetermined pressure by using the pressure decrease of the primary side 8 as a pilot is used, and the pressure of the secondary side 7 is adjusted to the opening valve 6. Except that the configuration is added with the function described above, the configuration is the same as that of the first embodiment shown in FIG. 1. Therefore, the same reference numerals are given to the components that can be used in common, and the description of the structure is omitted.

That is, the small flow rate flow device A includes a valve seat 38 formed by an orifice, a valve body 40 urged by a spring 39 to open the valve seat 38, and a second end of the valve body 40. The bellows 41 is provided, a pressure adjustment chamber 43 in a valve box 42 divided by the bellows 41, and a liquid feed chamber 44 formed inside a valve seat 38. 4
3 is connected to the secondary side pipe 5 by a pipe 52.

The pressure control valve 37 pushes the valve body 40 by the hydraulic pressure on the primary side 8 to open the valve seat 38, and the fire extinguishing liquid is supplied to the liquid supply chamber 4.
The liquid is filled into the secondary pipe 5 and the sprinkler head 4 via the pipe 4 and the pipe 52, and when the hydraulic pressure of the pipe 52 rises and falls below the hydraulic pressure of the primary side 8 to a predetermined hydraulic pressure during fire monitoring, the pressure regulating chamber 43 The bellows 41 and the valve body 40 are pushed by the hydraulic pressure of the liquid, the valve seat 38 is closed, and when the hydraulic pressure of the pipe 52 (secondary pipe 5) becomes lower than the predetermined hydraulic pressure, the bellows 41 and the valve body 40 move toward the liquid feed chamber 44 side. The bellows 41 and the valve body 40 are pushed back by the hydraulic pressure of the primary side 8 applied to the valve body 40 having a small area ratio and the spring 39, and the valve seat 3
8 is opened, and the hydraulic pressure of the secondary pipe 5 is restored to a predetermined hydraulic pressure.

If a slight decrease in hydraulic pressure occurs in the secondary pipe 5 other than the opening of the sprinkler head 4, the pressure regulating valve 37 operates to replenish the secondary pipe 5 as described above. Held at pressure. The opening valve 6 is substantially the same as that of the first embodiment, and a valve body opening adjustment hole 46 is provided in the operation chamber 17, and the valve body opening adjustment hole 46 is opened by the action of the flam 47. Is adjusted.

One side of the flam 47 faces the secondary pressure monitoring chamber 50, and the other side is urged by a secondary pressure setting spring 48 so as to increase the opening, and is integrated with the flam 47. The degree of opening of the valve body opening adjustment hole 46 is adjusted by the displacement of the needle 49. When a fire occurs in this state, the operation is performed in the same manner as in the first embodiment, and the operation of the release valve 6 is such that the fire extinguishing liquid in the operation chamber 17 is drained through the valve opening adjustment hole 46 by opening the operation valve 22. It is discharged from the pipe 29 and the processing chamber 1
Due to the pressure reduction in the valve 7, the valve element 15 is separated from the valve seat 14 by the hydraulic pressure on the secondary side 7, and the release valve 6 is opened.

Then, the pressure liquid on the primary side 8 flows to the secondary side 7, and the pressure switch 27a connected to the secondary side 7 operates to start the pressurized liquid supply device 13. Here, the secondary side 7
When the pressure rises above a predetermined hydraulic pressure at the time of fire monitoring, the pressure in the secondary pressure monitoring chamber 50 also rises, and the flam 47 is pushed by the pressure on the secondary side 7 that overcomes the secondary pressure setting spring 48, The needle 49 closes the valve opening adjustment hole 46. Then, the pressure in the operation chamber 17 rises, the valve body 15 comes into contact with the valve seat 14, the release valve 6 closes, and the pressurized liquid sending device 13 also stops.

The pressure in the secondary pipe 5 is kept constant at the set pressure in the fire extinguishing liquid discharge standby state, and even when the fire extinguishing liquid is released by opening the sprinkler head 4, the pressure in the secondary pipe 5 is maintained. The hydraulic pressure of the fire extinguishing liquid is maintained at the same set pressure as in the standby state for extinguishing the fire extinguishing liquid by the pressure regulating action of the opening valve 6, and is discharged from the sprinkler head 4 at a predetermined pressure. In the third embodiment as well, since air is not interposed in the sprinkler head 4 and the secondary pipe 5 unlike the conventional pre-actuated sprinkler fire extinguishing equipment, the fire extinguishing liquid is simultaneously released with the sprinkler head 4 opening operation. Is released, there is no delay in the fire extinguishing operation, and a compressor for constantly pressurizing the secondary pipe 5 with air is not required in the present invention, and the equipment cost is reduced, which is the same effect as in the first embodiment. In addition, since the hydraulic pressure on the secondary side 7 is kept at a predetermined low pressure even when the sprinkler head 4 is opened by the operation of reducing the hydraulic pressure by the pressure regulating valve 37, the secondary side 7 of the release valve 6 No load is applied to the piping (secondary piping 5 and the like), valves, etc., and no damage is caused to the equipment and piping by the pressure liquid.

In the first and second embodiments also, a pressure switch or the like for monitoring the fluid pressure is provided on the secondary pipe 5 or the like,
By providing a valve that closes in conjunction with this in the bypass pipe 23 or the like, the hydraulic pressure of the secondary pipe 5 is made lower than the hydraulic pressure of the primary side 8, thereby achieving the above-described effect unique to the third embodiment. Obtainable. Further, when the release valve 6 having a pressure regulating function is used as in the third embodiment, the pressure on the secondary pipe 5 side becomes low even when the fire extinguishing liquid is discharged, and the pressure resistance grade of the secondary pipe 5 and the like is sufficiently low. This is very effective in controlling equipment costs.

[0031]

As described above, according to the present invention, when the release valve is closed, the fire extinguishing liquid is filled in the secondary side up to the sprinkler head by the water flow means. The liquid is discharged and there is no delay in the fire fighting operation.

Further, a compressor for constantly pressurizing the secondary side with air is not required , and the water passage means is extremely low.
Since it can be implemented by a simple structure, the equipment cost can be kept low. In addition, a pressure switch is provided to output an abnormal signal to detect an abnormal alarm by detecting a pressure drop on the secondary side.If the sprinkler head is opened due to mechanical shock, the pressure switch operates. Since an abnormality alarm is issued, the system in which the abnormality has occurred can be displayed, and water damage can be reduced. Ma
In addition, fire-extinguishing water is regulated to the secondary side by water flow and introduced.
The pressure on the primary side of the release valve
The pressure on the secondary side can be reduced to a predetermined value,
There is no burden on the piping and valves, etc. on the downstream side.
It can prevent the occurrence of breakage accidents of equipment and piping, and in terms of durability
It is very effective.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a second embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire detector 2, 11, 20, 26 Electric circuit 3 Receiving board 4 Sprinkler head 5 Secondary piping 6 Opening valve 7 Secondary 8 Primary 9 and 31 Gate valve 10 Pump 12 Motor 13 Pressurized liquid sending device (fire extinguishing liquid) Supply means) 14, 14a, 14b, 38 Valve seat 15, 40 Valve body 16, 42 Valve box 17 Operation room 18, 39 Spring 19, 36 Small hole 21 Electric part 22 Operation valve 23 Bypass pipe (Pipe) 24, 28 Orifice 25, 52 Piping 27a, 27b Pressure switch 29, 32 Drain pipe 33, 34 Pressure gauge 35 Partition wall 37 Pressure regulating valve 41 Bellows 43 Pressure regulating chamber 44 Liquid feed chamber 45 Primary side piping 46 Valve opening adjustment hole 47 Flam 48 2 Secondary pressure setting spring 49 Needle 50 Secondary pressure monitoring room 51 Signal water inlet room A Small flow rate flow device

Claims (3)

(57) [Claims] 1. A fire detector, a closed-type sprinkler head, and a primary side and a secondary side which are always closed by a valve body to detect a fire phenomenon of the fire detector and reduce a pressure of the secondary side. An opening valve for moving the valve element in the opening direction based on the decrease, a water passage means for introducing fire-extinguishing water from the primary side to the secondary side, and an abnormality alarm by detecting the pressure decrease on the secondary side. A sprinkler fire extinguishing system, comprising: a pressure switch that outputs an abnormal signal for performing the operation. 2. A fire detector, a closed-type sprinkler head, and the normally closed state and the primary side and the secondary side, and an open valve which opens on the basis of the detection of a fire phenomenon of the fire detector, the primary Water supply means for introducing fire-extinguishing water from the side to the secondary side, and a pressure switch for outputting an abnormal signal for detecting a pressure drop on the secondary side and performing an abnormal alarm. Sprinkler fire extinguishing equipment. 3. The water passing means is configured to supply fire-extinguishing water to the secondary side.
3. The method according to claim 1, wherein the pressure is adjusted and introduced.
On-site sprinkler fire extinguishing equipment.