JP2979252B2 - 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 systems such as open and closed wet and dry systems. 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 damage to the sprinkler head, etc. A pre-actuated type that fills and waters when the sprinkler head operates
(Pre-action type) There is a sprinkler fire extinguishing system. 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 where water damage such as a part is extremely disliked.

[0003]

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
When the fire detector detects a fire and the closed type sprinkler head operates, that is, the fire extinguishing liquid is released only by the AND condition between the fire detector and the sprinkler head. Since it is only filled with pressurized air, it has the characteristic that even if the closed sprinkler head is opened due to impact or the like, a water damage accident does not occur. However, a compressor or the like is required to pressurize the secondary pipe to which the closed sprinkler head is connected, and the entire equipment becomes complicated and expensive. Since the discharged air comes out, there is a problem that a delay occurs before the fire extinguishing liquid starts to be discharged normally.

In order to compensate for the disadvantages of the above-mentioned conventional system, a fire detector and a closed type sprinkler head are provided in a security area, and a primary pipe of an opening valve is provided to a fire extinguishing liquid supply means.
The secondary pipe is connected to a closed type sprinkler head, and when the open valve is open, the fire extinguishing liquid in the primary pipe is reduced to a predetermined pressure and supplied to the secondary pipe. There has been proposed a sprinkler fire extinguishing system that can reduce the pressure resistance grade of the secondary piping system such as the secondary piping and the sprinkler head so as to reduce the equipment cost. However, in this sprinkler fire extinguishing system, there is always a large difference between the hydraulic pressure on the primary side and the secondary side of the release valve. Therefore, when the release valve is opened, a large primary pressure is momentarily introduced into the secondary piping system. Results in a large water hammer phenomenon
(Abnormal pressurization) occurs, and there remains anxiety about lowering the pressure-resistant grade of the above-mentioned equipment member of the secondary piping system.

The present invention has been proposed to solve such various problems of a conventional sprinkler fire extinguishing system, and can sufficiently prevent a water hammer phenomenon when an opening valve is opened. Pressure-resistant gray of secondary piping system components
It is an object of the present invention to provide an inexpensive sprinkler fire extinguishing system that can reduce the load safely and has a simple structure.

[0007]

According to the present invention, in order to solve the above-mentioned problems, the primary pipe 16 is provided with a fire extinguishing liquid supply means 13.
An open valve 6 is connected to each of the sprinkler heads 4 in which the secondary pipe 5 is closed. The open valve 6 is normally closed, and the fire detecting means 1 detects a fire phenomenon.
In a sprinkler fire extinguishing system that is opened by a signal based on the
6 has a pressure regulating device R for reducing the pressure of the fire extinguishing liquid to a predetermined pressure and supplying the fire extinguishing liquid of the primary pipe 16 to the secondary pipe 5 at a small flow rate. A liquid flow means A, a specified flow rate liquid flow means C for flowing the fire extinguishing liquid in the primary pipe 16 to the secondary pipe 5 through the open valve 6 at a specified flow rate, and operating these liquid flow means A and C, respectively; First activation means 24, 55
And second activation means 34, 47, 24, and the first activation means 24, 55 based on the detection signal of the fire detection means 1.
The operation of the small flow rate liquid passing means A is performed by the second starting means 34, 47, and 24.
Is configured to be switched.

The second starting means 34, 47, 24 are configured to be started by a detection signal of a pressure detecting device 40 for monitoring the hydraulic pressure of the secondary pipe 5.

[0009] Either the first activating means 24, 55 or the second activating means 34, 47, 24, or both,
Valves 24, 34 operated by electric units 41, 42, 57,
47 and 55.

[0010] The small flow rate liquid passing means A is a specified flow rate liquid passing means C.
The orifices 33 are arranged in parallel with each other.

[0011] Small flow rate flow means A and specified flow rate flow rate means C
Is composed mainly of a valve 47 having a small-diameter port 49 and a large-diameter port 50 operated by the electric unit 42.

[0012]

According to the detection signal of the fire detecting means 1, the operation of the small flow rate liquid passing means A is performed by the first starting means, and the secondary side piping system such as the sprinkler head 4 and the secondary side piping 5 has a small flow rate. The liquid pressure is gradually increased by the liquid passing means A, and thereafter, the specified flow rate liquid passing means C operates to secure a flow rate necessary for fire extinguishing. As a result, at the time of detection of a fire, the small flow rate
The fluid pressure gradually increases while restricting the flow rate, and thereafter, the boosted value due to the operation of the prescribed flow rate fluid passing means C becomes smaller than the fluid pressure by the small flow rate fluid passing means A. The occurrence of the tar hammer phenomenon is suppressed. Therefore, it is sufficient that the pressure resistance grade of the equipment member of the secondary piping system is sufficiently low, and the sprinkler fire extinguishing equipment which does not cause damage to the equipment member based on the high-pressure liquid as in the related art and can suppress the equipment cost. Was.

When the release valve 6 is opened, the fire-extinguishing liquid whose pressure has been reduced by the pressure regulating device R is supplied to the secondary piping system, and the secondary piping system such as the secondary piping 5 and the sprinkler head 4 is installed. The pressure resistance grade of the member may be sufficiently low.

[0014] From the small flow rate means A to the specified flow rate means C
Starting means 34, 47, 2 for switching to
4 is a pressure detector 40 for monitoring the hydraulic pressure of the secondary pipe 5
, The occurrence of the water hammer phenomenon is reliably suppressed without error.

The valves 24, 34, 47, 55 constituting one or both of the first activating means 24, 55 and the second activating means 34, 47, 24 are provided with the electric motor 4.
1, 42, 57 are activated accurately and easily.

The small flow rate liquid passing means A is provided with a specified flow rate liquid flowing means C.
Can be easily configured by using the orifices 33 arranged in parallel in the main body.

Small flow rate liquid passing means A and specified flow rate liquid flowing means C
Can be composed of a small number of members by mainly using a valve 47 having a small-diameter port 49 and a large-diameter port 50 operated by the electric unit 42.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a first embodiment of a sprinkler fire extinguishing system. A fire detector 1 of a differential type, a constant temperature type, or the like as a fire detecting means for detecting a fire phenomenon in a caution area is connected to a receiver 3 via an electric line 2. Like the fire detector 1, the closed type sprinkler head 4 provided on the ceiling of the warning area is connected to the secondary side 7 of the opening valve 6 through the secondary side pipe 5.
Connected to. The primary side 8 of the opening valve 6 is connected via a primary side pipe 16 to a pressurized liquid supply device 13 as a fire extinguishing liquid supply means, and a gate valve 9, a pump 10, and an electric circuit 11 shown in FIG. Motor connected to the receiver 3 by
In addition to the components 12 and the like, the pressurized liquid sending device 13 includes a normal check valve, a pressurized air tank, and the like (not shown).

The opening valve 6 is divided into the primary side 8 and the secondary side 7 by a valve seat 14a. The back of a valve body 15 that opens and closes the valve seat 14a is formed in a cylinder chamber 20, and the secondary side 7 is opened.
A signal inlet chamber 22 is formed by a valve seat 14b provided on the outer peripheral side of the valve seat 14a, and the valve body 15 is urged by a spring 18 to close the valve seats 14a and 14b.
Is provided with a small hole 19 for introducing a part of the hydraulic pressure on the primary side 8. The opening and closing operation of the valve element 15 is controlled such that the hydraulic pressure on the primary side 8 is reduced to a predetermined pressure by the pressure adjusting pilot valve 21 as the pressure adjusting device R and supplied to the secondary side 7. You. That is, the pressure regulating pilot valve 21
Is an operation chamber 17 that communicates with the cylinder chamber 20 via a pipe 23.
And the operating room 1 via a starting valve 24 as a first starting means.
7, a pressure regulating valve seat 26 leading to a drain pipe 25, and a flam 29
And a pressure regulating valve body 28 urged by a spring 27 in a direction to open the pressure regulating valve seat 26, and a pressure regulating chamber 30 communicating with the secondary side 7 via a pipe 31.

The secondary side 7 of the opening valve 6 is connected to the secondary pipe 5 by a small flow passage means A composed of a pipe 32 and an orifice 33. In parallel with the small flow passage means A,
A prescribed flow rate liquid passing means C constituted by a bypass valve 34 and a pipe 35 as a second starting means is provided between the secondary side 7 and the secondary side pipe 5. A drain pipe 37 having an orifice 36 is connected to the signal inlet chamber 22.
Is provided with a pressure switch 39 for detecting the pressure increase due to the opening of the opening valve 6 and notifying the reception panel 3 of the pressure increase. The secondary pipe 5 is also provided as a pressure detection device for outputting the pressure increase or reduction to the reception panel 3. Pressure switch 40 is provided. Start valve 24
Is opened by an electric motor 41 operated by detecting a fire phenomenon of the fire detector 1, and the bypass valve 34 is controlled by the pressure switch 40 so that the secondary pipe 5 is lower than the predetermined pressure by the pressure adjustment of the pressure adjustment pilot valve 21. Each of the receivers 3 is opened so as to be opened by the electric unit 42 that operates when the preliminary pressure is reached.
Is controlled by The electric units 41 and 42 are constituted by motors and electromagnetic solenoids. The opening of the bypass valve 34 may be performed by a timer (not shown) after a fixed time from the opening of the starting valve 24, instead of the pressure switch 40. The end of the secondary pipe 5 is open to the atmosphere through an orifice 43 (provided at a position higher than the secondary pipe 5 and the sprinkler head 4) and a drain pipe 44.

Next, the operation of the above embodiment will be described.
The starting valve 24 and the bypass valve 34 are initially closed. First, a non-pressure fire extinguishing liquid is filled in a secondary piping system such as the sprinkler head 4 and the secondary piping 5. In this liquid filling operation, first, the gate valve 9 is opened, and the primary side 8 of the opening valve 6 is pressurized by the pressurized liquid sending device 13. Next, the gate valve 9 is closed, the start valve 24 is opened, and the pressure in the cylinder chamber 20 is reduced, so that the opening valve 6 can be opened. Then, the gate valve 9 is gradually opened, and the fire extinguishing liquid slowly flows into the secondary piping system of the opening valve 6. The fire extinguishing fluid is supplied to the release valve 6
Flows from the secondary side 7 to the secondary side pipe 5 and the sprinkler head 4, passes through the orifice 43, and flows down to the drain pipe 44. When the fire extinguishing liquid has passed the orifice 43, the starting valve 24 is closed, and the opening valve 6 is closed.

As a result, the pressure fluid acting on the secondary piping system is discharged to the drain pipe 44 via the orifice 43, and the secondary piping system is charged without pressure. In this way, the secondary pipe system such as the secondary pipe 5 and the sprinkler head 4 is filled, and by using the orifice 43 to make the proportion of air communication small, diffusion of the fire extinguishing liquid into the atmosphere is prevented. It is possible to maintain the pressureless liquid state for a long period of time. In a normal state in which the fire detector 1 is not operated, the fire extinguishing liquid on the primary side 8 of the opening valve 6 in each guard area enters the cylinder chamber 20 through the small hole 19 and is actuated by the hydraulic pressure of the pressurized liquid sending device 13 and the spring 18. 15 closes the valve seats 14a and 14b,
5 is in a monitoring state. Since the fire extinguishing liquid in the secondary pipe 5 and the like is filled without pressurization, there is no loss of fire extinguishing liquid during monitoring.

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 41 is operated by the fire signal to open the starting valve 24, so that the hydraulic pressure in the cylinder chamber 20 of the opening valve 6 is discharged from the drain pipe 25 through the operation chamber 17 and the hydraulic pressure is reduced. The opening valve 6 is opened by the hydraulic pressure on the primary side 8, the hydraulic pressure in the signal inlet chamber 22 increases, and the pressure switch 39 operates to notify the receiving board 3 of the opening of the opening valve 6. on the other hand,
The pressure liquid on the primary side 8 flows to the pipes 31 and 32 via the secondary side 7 by a pressurizing means such as a pressure air tank (not shown). Piping 3
Since the pressure fluid to 2 is throttled by the orifice 33 and flows into the secondary pipe 5, the fluid pressure gradually increases, and the water-hammer phenomenon (abnormal pressurization) due to this flow does not occur.

The pressure fluid to the pipe 32 flows into the pressure regulating chamber 30 via the pipe 31, and when the fluid pressure on the secondary side 7 exceeds the set pressure of the pressure regulating pilot valve 21, the pressure fluid in the pressure regulating chamber 30 The flam 29 and the pressure regulating valve body 28 are pushed downward, the pressure regulating valve seat 26 is closed, the drainage of the operation chamber 17 stops, and the spring 18 stops the valve body 1.
5 closes the valve seats 14a, 14b. When the hydraulic pressure on the secondary side 7 falls below the set pressure of the pressure regulating pilot valve 21, the pressure regulating valve body 28 is returned by the spring 27, the pressure regulating valve seat 26 is opened, and the pressure fluid in the cylinder chamber 20 is discharged through the operation chamber 17. The valve body 15 is pushed by the liquid pressure on the primary side 8 by the liquid and the valve seats 14a, 14
b is opened and the fire extinguishing liquid on the primary side 8 is introduced into the secondary side 7 and the hydraulic pressure on the secondary side 7 is restored, and thus the hydraulic pressure on the secondary side 7 is reduced to the level of the fire extinguishing liquid on the primary side 8 The pressure is reduced to a predetermined pressure required for fire fighting. Since the orifice 33 is narrowed down, the secondary side 7 and the pipe 31,
The fluid pressure in the pressure regulating chamber 30 and the like immediately rises when the opening valve 6 is opened, and the valve body 15 is closed, so that the opening degree of the valve body 15 is small. Therefore, the pressure regulating operation by the pressure regulating pilot valve 21 is sufficiently performed before the hydraulic pressure of the secondary pipe 5 abnormally increases, and the water-hammer phenomenon is surely suppressed from this point as well.

The hydraulic pressure of the secondary pipe 5 is
When the preliminary pressure is lower than the predetermined pressure by the pressure adjustment of 1,
The electric motor 42 is operated by the pressure switch 40 to open the bypass valve 34, and the pressure fluid on the secondary side 7 of the opening valve 6 is not throttled from the pipe 35 bypassing the orifice 33 and the bypass valve 34 to the secondary pipe 5. Will be introduced. Bypass valve 34
The hydraulic pressure applied to the secondary pipe 5 at the time of opening is a small difference between the regulated hydraulic pressure and the hydraulic pressure of the secondary pipe 5 that has been increased to the preliminary pressure, and the abnormal pressure rise due to the opening of the bypass valve 34. Is
Extremely small. 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 discharged, and a large drop in hydraulic pressure in the secondary pipe 5 is detected by a pressure air tank or the like (not shown). Then, the pump 10 of the pressurized liquid sending device 13 is activated, and this discharge is continued until the fire is extinguished. Since the fire extinguishing liquid is filled at a predetermined pressure in the secondary pipe 5 to the sprinkler head 4 and the like, 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.

In addition to the above, a compressor for constantly pressurizing the secondary pipe 5 with air, such as a pre-operation type, is not required in this embodiment, and the equipment cost is reduced. The hydraulic pressure of the secondary piping system such as the secondary piping 5 and the sprinkler head 4 is regulated to a low pressure with respect to the primary side 8 by the pressure regulator R. Pressure-resistant gray
Therefore, the sprinkler fire extinguishing equipment was able to suppress the equipment cost without causing the breakage of the equipment members due to the high-pressure liquid as in the prior art. At the time of fire monitoring, a small amount of non-pressure fire extinguishing liquid is released when the sprinkler head 4 is opened due to an impact or the like, and a large water damage accident as in the conventional closed sprinkler fire extinguishing equipment can be prevented. In the first embodiment, the opening valve 6 and the pressure regulating pilot valve 21 as the pressure regulating device R are separate bodies, but they may be formed integrally. Although the illustrated opening valve 6 has a structure that is opened by depressurization of the cylinder chamber 20, a pressure-opening type opening valve in which the cylinder chamber is opened by pressurization can be applied.

FIG. 2 is a block diagram showing a second embodiment of the present invention. In the second embodiment, the secondary side 7 of the release valve 6
And the secondary pipe 5 are connected to the pipe 46 and the two-way orifice valve 4.
7 and connect the small flow rate liquid passing means A to the two-way orifice valve 4
7 and the specified flow rate means C
Is controlled by the large-diameter port 50 of the two-way orifice valve 47.
The second actuating means, each of which is configured to operate the specified flow rate liquid passing means C, is constituted by the two-way orifice valve 47, and is provided between the small diameter port 49 and the large diameter port 50 of the two-way orifice valve 47. Except that the switching operation is performed by the electric unit 42, the switching operation is the same as that of the first embodiment of FIG. 1 described above. .

In the second embodiment, the small-diameter port 4 of the two-way orifice valve 47 is connected to the secondary pipe 5 and the pipe 46 during monitoring.
9 is controlled to a position where they communicate with each other, and similar to the first embodiment,
In a normal state where no fire occurs, the secondary side piping system is filled with no pressure. When a fire occurs and the fire detector 1 operates, the opening valve 6 is opened by the operation of each part similar to the first embodiment. The pressure fluid from the pipe 46 is throttled by the small-diameter port 49 and flows into the secondary pipe 5, so that the hydraulic pressure gradually increases, and the water-hammer phenomenon due to the inflow does not occur. The pressure of the secondary side 7, the pipe 31, the pressure regulating chamber 30, and the like before the pipe 46 immediately rises when the release valve 6 is opened, and the valve body 15 is closed. Therefore, the opening degree of the valve body 15 becomes small, and the pressure regulating pilot valve 2 is increased before the hydraulic pressure of the secondary pipe 5 abnormally increases.
1 is sufficiently performed, and from this point, the suppression of the water hammer phenomenon is surely performed.

When the hydraulic pressure of the secondary side pipe 5 is
When the preliminary pressure is lower than the predetermined pressure by the pressure adjustment of 1,
The electric switch 42 is operated by the pressure switch 40, and is moved to a position where the large-diameter port 50 communicates with the secondary pipe 5 and the pipe 46.
The rotation of the orifice valve 47 is controlled, and the pressure fluid on the secondary side 7 of the opening valve 6 is introduced from the large-diameter port 50 to the secondary pipe 5 without being throttled. The hydraulic pressure applied to the secondary pipe 5 at the time of opening is a small difference between the regulated pressure and the hydraulic pressure of the secondary pipe 5 which has already been increased to the preliminary pressure. The boost is very small.

Therefore, also in the second embodiment, the sudden increase in the hydraulic pressure in the secondary pipe 5 is initially suppressed by the small-diameter port 49, and when the port is switched to the large-diameter port 50, the pressure increase is slight. In addition to the main effect that the water hammer phenomenon does not occur, since the fire extinguishing liquid is filled at a predetermined pressure in the secondary pipe 5 to the sprinkler head 4 and the like, the opening operation of the sprinkler head 4 and the 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 as in the pre-operation type is unnecessary in this embodiment. Since the hydraulic pressure of the secondary piping system such as the sprinkler head 4 is regulated to a lower pressure than the primary side 8 by the pressure regulator R, the pressure-resistant grade of the equipment members of the secondary piping system is sufficient. It is necessary to use a low pressure, The sprinkler fire extinguishing system has the same effect as that of the first embodiment in that the sprinkler fire extinguishing system does not cause damage to the equipment members and can reduce the equipment cost. C has a special effect that it can be simply configured by one two-way orifice valve 47. FIG. 3 is a block diagram showing a third embodiment of the present invention. In the third embodiment, the specified flow rate liquid passing means C is provided by a pipe 53 which connects the secondary side 7 of the release valve 6 to the secondary side pipe 5, and the small flow rate liquid passing means A is provided by a primary side pipe 16. On the other hand, each of the pipes 54, the bypass valve 55, and the orifice 56 connected between the primary pipe 16 and the secondary pipe 5 so as to bypass the opening valve 6 and the pipe 53, respectively. The first activating means for operating the means A is constituted by the bypass valve 55, and the second activating means for operating the specified flow rate liquid passing means C is constituted by the actuating valve 24, and is closed during monitoring. This bypass valve 5
The opening operation of 5 is performed by the fire detection of the fire detector 1, and the operation of the pressure switch 40 that detects that the hydraulic pressure of the secondary pipe 5 has increased to the preliminary pressure closes the bypass valve 55, and Except that the starting valve 24 is opened, it is the same as the first embodiment of FIG. 1 described above. Therefore, the same reference numerals are given to the components that can be used in common, and the description of the structure is omitted.

In the third embodiment, during monitoring, the bypass valve 55 is closed, and the secondary piping system is filled with no pressure in a normal state where no fire occurs, as in the first embodiment. . When a fire occurs and the fire detector 1 operates, the bypass valve 55 is opened, and the pressure fluid in the primary pipe 16 is throttled by the orifice 56 and flows into the secondary pipe 5.
The hydraulic pressure gradually increases, and the water-hammer phenomenon caused by the inflow does not occur.

The hydraulic pressure in the secondary pipe 5 is
When the preliminary pressure is lower than the predetermined pressure by the pressure adjustment of 1,
The pressure switch 40 outputs a command to the electric unit 57 so as to close the bypass valve 55 via the receiving board 3,
A command is issued to the electric unit 41 to open the start valve 24. As a result, the pressure fluid in the operation chamber 17 is drained and the release valve 6 is opened as described above, and the pressure fluid in the primary side pipe 16 is released from the release valve 6.
Is introduced into the secondary pipe 5 without being throttled through the pipe 53. The hydraulic pressure applied to the secondary pipe 5 when the opening valve 6 is opened includes the hydraulic pressure of the primary pipe 8 and the hydraulic pressure of the secondary pipe 5 which has already been increased to the preliminary pressure by the charging through the orifice 56. Therefore, the abnormal pressure increase due to the opening of the opening valve 6 is extremely small. The closing command of the bypass valve 55 and the opening command of the activation valve 24 may be performed by a timer (not shown) after the detection operation of the fire detector 1.

In the third embodiment, the orifice 56
The sudden increase in the hydraulic pressure in the secondary pipe 5 is suppressed by the introduction of the pressure liquid through the valve, and when the opening valve 6 is opened, the pressure increase is slight and the water-hammer phenomenon does not occur. In addition, since the fire extinguishing solution is filled at a predetermined pressure in the secondary pipe 5 to the sprinkler head 4 and the like, the sprinkler head 4
The fire extinguishing liquid is discharged simultaneously with the opening operation of the fire extinguishing operation, there is no delay in the fire extinguishing operation, and a compressor for constantly pressurizing the secondary pipe 5 with air as in the pre-operation type is unnecessary in this embodiment. The hydraulic pressure of the secondary piping system such as the side piping 5 and the sprinkler head 4 is regulated to a low pressure with respect to the primary side 8 by the pressure regulator R. The first embodiment has the same effect as the first embodiment, in that the sprinkler fire extinguishing system is sufficiently low and does not cause breakage of equipment members based on the high-pressure liquid as in the prior art, and can suppress the equipment cost. In addition, the small flow passage means A and the prescribed flow passage means C have a special effect that the bypass valve 55, the orifice 56, and the pipe 53 can be easily configured.

FIG. 4 is a block diagram showing a fourth embodiment of the present invention. In the fourth embodiment, the terminal drain valve 59 is connected to the terminal of the secondary pipe 5, and the opening operation of the terminal drain valve 59 which is closed at the time of monitoring is performed by the fire detector 1 detecting the fire. The terminal drain valve 5 is operated by the operation of the pressure switch 40 which detects that the hydraulic pressure of the secondary pipe 5 has increased to the preliminary pressure.
9 is closed and the start valve 24 is opened similarly to the third embodiment of FIG. 3, and is the same as that of the third embodiment. The description of the structure is omitted. still,
At the time of filling the secondary side piping system with the non-pressure fire extinguishing liquid, the terminal drain valve 59 is opened and the gate valve 9 is gradually opened. If this terminal drain valve 59 is closed, the liquid filling is performed without being pressurized. The closing timing of the terminal drain valve 59 which is opened by the operation of the fire detector 1 is determined by the time when the opening valve 6 is opened.
If configured so as to be performed (by a command from the pressure switch 39), the action of reducing the hydraulic pressure by the terminal drain valve 59 when flowing in from the bypass valve 55 is further ensured.

In the fourth embodiment, when a fire occurs and the fire detector 1 operates, the bypass valve 55 and the terminal drain valve 5
9 is opened and the pressure fluid in the primary side pipe 16 is supplied to the orifice 56.
The fluid flows into the secondary pipe 5 and is gradually increased in pressure. The water-hammer phenomenon due to the inflow is suppressed, and the pressurized liquid is discharged from the secondary pipe 5 so that the bypass is performed. The inflow from the valve 55 can be performed with confidence. By providing a terminal drain valve 59 similar to that of the fourth embodiment at the terminal of the secondary pipe 5 in the first to third embodiments, the liquid filling is performed without being pressurized, and a bypass valve is provided. The same effect as in the fourth embodiment can be obtained, for example, the effect of alleviating the rise in hydraulic pressure at the time of inflow from 55 becomes more reliable.

In the fourth embodiment, the orifice 56
The sudden increase in the hydraulic pressure in the secondary pipe 5 is suppressed by the introduction of the pressurized liquid through the valve, and when the opening valve 6 is opened, the pressure increase is slight and the water-hammer phenomenon does not occur. In addition to the main effect equivalent to the example, the rise in hydraulic pressure due to inflow from the bypass valve 55 is released to the atmosphere by the terminal drain valve 59,
The fire extinguishing liquid is discharged at the same time as the opening operation of the sprinkler head 4 because the fire extinguishing liquid is filled in the secondary pipe 5 such as the sprinkler head 4 at a predetermined pressure. There is no delay in the fire extinguishing operation, and a compressor for constantly pressurizing the secondary pipe 5 with air as in the pre-actuated type is unnecessary in this embodiment, and the secondary pipe 5 and the sprinkler head 4 are not required. Since the hydraulic pressure of the secondary piping system is regulated to a low pressure with respect to the primary side 8 by the pressure regulating device R, the pressure-resistant grade of the secondary piping system is sufficiently low. As described above, the sprinkler fire extinguishing equipment has the same effect as that of the first embodiment in that the equipment members are not damaged due to the high-pressure liquid and the equipment cost can be suppressed. In each of the above embodiments, the non-pressurized fire extinguishing liquid is filled in the secondary pipe 5 and the like for fire monitoring. However, as in the fourth embodiment, the terminal of the secondary pipe 5 is connected to a normal drain valve. Alternatively, the secondary side may be slightly pressurized, in which case the leakage of the secondary side pipe 5 or the sprinkler head 4
Can be detected. As the fire detecting means, the fire detector 1 is used in each embodiment, but running water for detecting the opening operation of the sprinkler head 4 or an electric contact by contact with water may be used.

[0037]

As described above, according to the present invention, the first activation means 24, 55 based on the detection signal of the fire detection means 1
As a result, the operation of the small flow passage means is performed, and in the secondary side piping system such as the sprinkler head and the secondary side piping, the fluid pressure is gradually increased by the small flow passage means, and thereafter, the specified flow passage means is operated. Then, the flow required for fire extinguishing is secured. As a result, when the fire is detected, the flow rate is restricted by the small flow rate flow means at the beginning of the fire detection, and thereafter, the boosted value by the operation of the specified flow rate flow rate means becomes smaller than the fluid pressure by the small flow rate flow means. Thus, the occurrence of the water hammer phenomenon is suppressed. Therefore, when the release valve 6 is opened, the fire-extinguishing liquid whose pressure has been adjusted by the pressure regulator R is supplied to the secondary piping system, and the pressure-resistant grade of the secondary piping system is sufficiently low. Thus, the sprinkler fire extinguishing equipment which does not cause breakage of equipment members due to the high-pressure liquid as in the related art and can suppress the equipment cost is provided.

From the small flow rate means A to the specified flow rate means C
Starting means 34, 47, 2 for switching to
4 is a pressure detector 40 for monitoring the hydraulic pressure of the secondary pipe 5
, The occurrence of the water hammer phenomenon is reliably suppressed without error.

The valves 24, 34, 47, 55 constituting one or both of the first activating means 24, 55 and the second activating means 34, 47, 24 are electrically driven parts 4.
1, 42, 57 are activated accurately and easily.

The small flow rate liquid passing means A is a specified flow rate liquid flowing means C.
Can be easily configured by using the orifices 33 arranged in parallel in the main body.

Small flow rate means A and specified flow rate means C
Can be composed of a small number of members by mainly using a valve 47 having a small-diameter port 49 and a large-diameter port 50 operated by the electric unit 42.

[Brief description of the drawings]

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

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

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

FIG. 4 is a block diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fire detector (fire detection means) 4 Sprinkler head 5 Secondary side piping 6 Opening valve 13 Pressurized liquid feeder (Fire extinguishing liquid supply means) 16 Primary side piping 21 Pressure regulation pilot valve (pressure regulation device R) 24, 34, 47, 55 Starting means (valve) 33 Orifice 40 Pressure switch (pressure detecting device) 41, 42, 57 Electric unit 49 Small diameter port 50 Large diameter port A Small flow rate flow means C Regular flow rate flow rate means

Claims (5)

(57) [Claims] An open valve connected to a fire extinguishing solution supply means on the primary side and a sprinkler head closed on the secondary side are provided, and the open valve is normally in a closed state to prevent a fire phenomenon. In a sprinkler fire extinguishing system that is opened by a signal based on the fire detection means to be detected, the opening valve controls the pressure of the fire extinguishing fluid in the primary pipe to a predetermined pressure and supplies it to the secondary pipe when it is open. It has a device, a small flow rate flow means for passing the fire extinguishing liquid of the primary pipe to the secondary pipe at a small flow rate, and the fire extinguishing liquid of the primary pipe at a specified flow rate to the secondary pipe via an open valve. It is provided with a prescribed flow rate liquid passing means for passing the liquid, and first and second starting means for operating these liquid passing means, respectively, and the first starting means based on the detection signal of the fire detecting means. The operation is performed, and thereafter, the operation is regulated by the second activation means. A sprinkler fire extinguishing system characterized by switching to a constant flow rate liquid passing means. 2. The sprinkler fire extinguishing equipment according to claim 1, wherein the second starting means is started by a detection signal of a pressure detecting device that monitors a hydraulic pressure of the secondary pipe. 3. The sprinkler fire extinguishing system according to claim 1, wherein the first and / or second starting means is a motor-operated valve. 4. The sprinkler fire extinguishing system according to claim 1, wherein the small flow rate liquid passing means mainly includes an orifice arranged in parallel with the specified flow rate liquid passing means. 5. The sprinkler according to claim 1, wherein the small flow rate liquid passing means and the prescribed flow rate liquid flowing means are mainly composed of a motor-operated valve having two ports of a small diameter and a large diameter. Fire extinguishing equipment.