JPH10151221A - Reduced pressure open type pressure regulating valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate to mount a pressure regulating valve and to reduce the size of a mounting space, by equipping an operating room, a secondary pressure monitoring room, and a pressurized liquid discharging means in a valve box to stop discharging the pressurized liquid from a pressurized liquid discharging means when the pressure of the secondary pressure monitoring room rises over a prescribed value. SOLUTION: A primary side 8 and a secondary side 7 of an open valve 6 are separated by a valve seat 14 and a valve body 15 to form an operating room 17. On the valve body 15 energized to close the valve seat 14 by a spring 18, a small hole 19 to guide part of liquid pressure at the primary side 8 is equipped and the operating room is communicated with an operating valve 22 opened/closed by a motor drive part 21. The opening of a valve body opening regulating hole 46 is regulated by the action of a diaphragm 47. Further, a small flow rate liquid passing device A is put on a by-pass pipe 23 to by-pass the primary side 8 and the secondary side 7 of the open valve 6 and a pressure regulating room 43 in a valve box 42 separated by bellows 41 and a liquid sending room 44 formed in the inside of a valve seat 38 are connected to a secondary side piping 5 by a piping 52.

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
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 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]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a fire alarm system, a closed sprinkler head 4, a primary side 8 and a secondary side 7, which are always closed in a security area. And an opening valve 6 which is opened when the fire detector 1 detects a fire phenomenon. The primary pipe 45 of the opening valve 6 is connected to the fire extinguishing liquid supply means 13 by the secondary pipe 5.
Are connected to the sprinkler head 4, respectively, and provided with a small flow rate liquid passing device A that bypasses the primary side 8 and the secondary side 7 of the release valve 6. And the small flow rate flow device A is
The orifice 24 or the small hole 36 or a small-diameter pipe is used. Further, the small flow rate flow device A has a pressure regulating function that can regulate the pressure on the secondary side 7 to a predetermined pressure based on the pressure fluid on the primary side 8 of the opening valve 6.
Can be configured by

(Function) When the opening valve 6 is closed, the fire extinguishing liquid is filled in the pipes up to the sprinkler head 4 by the small flow rate liquid passing device A, so that the fire extinguishing liquid is discharged simultaneously with the opening operation of the sprinkler head 4. There is no delay in fire fighting. A compressor for constantly pressurizing the piping with air is not required, and equipment costs are reduced.

When the sprinkler head 4 is opened by an impact or the like, the fire extinguishing liquid discharged is small because the small flow rate flow device A is constituted by the orifice 24, the small hole 36, the small diameter pipe or the pressure regulating valve 37. It is slight and can prevent a large water damage accident as in a conventional closed sprinkler fire extinguishing system. When the small flow rate flow device A is configured by, for example, a pressure regulating valve 37 that can adjust the pressure of the pressure fluid on the secondary side 7 to a predetermined pressure based on the pressure fluid on the primary side 8 of the opening valve 6,
The primary side 8 is always connected to the piping and valves of the secondary side 7 of the release valve 6.
Since the high pressure does not act directly, no load is imposed on the equipment, which is effective in terms of durability.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 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 the security area as in the case of the fire detector 1 is connected to a secondary side 7 of an opening valve 6 via 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 valve seats 14a, 14b provided in double inside and outside, and these valve seats 1
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 as the first embodiment of the small flow rate liquid flowing device A according to the first embodiment of the present invention has a bypass pipe 23 provided so as to bypass the primary side 8 and the secondary side 7 of the opening valve 6. 24 are interposed. In the pipe 25 connected to the signal water inlet chamber 51, the opening of the
A pressure switch 27a is provided for notifying the receiving board 3 of this, the receiving board 3 is activated, and the pressurized liquid sending device 13 is started. Are connected.

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 is opened, but the primary side 8
Since the sprinkler head 4 is not opened and the secondary side 7 have substantially the same pressure, the valve body 15 keeps the valve seats 14a and 14b closed by its own weight and the urging force of the spring 18. 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 system, 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. The first embodiment can be implemented with an extremely simple structure in which the bypass pipe 23 and the orifice 24 are added to the conventional apparatus, and the equipment cost can be reduced. If a small diameter pipe is used as the bypass pipe 23 (small diameter pipe), the orifice 24 in FIG.
Can be omitted.

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 side pipe 5 becomes lower. 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 damage accidents like fire sprinklers.

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. Embodiment 1 is equivalent to Embodiment 1,
Therefore, constituent members that can be used in common are denoted by the same reference numerals, and description of the structure is omitted. Fire detector 1
The fire extinguishing fluid on the primary side 8 is in a small hole
From the secondary side 7, the liquid is supplied to the sprinkler head 4 through the secondary side pipe 5, the sprinkler head 4 is charged to the same hydraulic pressure as the primary side 8, and the sprinkler When a slight decrease in the liquid pressure occurs other than when the head 4 is opened, the fire extinguishing liquid on the primary side 8 is supplied to the secondary side pipe 5 through the small holes 36 and is 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 unlike 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 a small flow rate suitable liquid apparatus A, a pressure regulating valve 37 which can reduce the pressure to a predetermined level by using the pressure reduction 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.

In the pressure regulating valve 37, the valve element 40 is pushed 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 element 40 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 in the same manner 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 activate the pressurized liquid feeding 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.

[0032]

As described above, according to the present invention, when the opening valve 6 is closed, the fire extinguishing liquid is filled in the secondary pipe up to the sprinkler head 4 by the small flow rate flow device A. The fire extinguishing liquid is released simultaneously with the opening operation of No. 4, and there is no delay in the fire extinguishing operation.

In addition, a compressor for constantly pressurizing the secondary pipe 5 with air is not required, and a sprinkler fire extinguishing system with a low equipment cost is obtained. According to the invention in which the small flow passage device A is constituted by the orifice 24 or the small hole 36 or the small-diameter pipe or the pressure regulating valve 37, the fire extinguishing liquid released when the sprinkler head 4 is opened by impact or the like is small. Therefore, a large water damage accident such as a conventional closed sprinkler fire extinguishing system can be prevented.

The small flow passage device A is connected to the primary side 8 of the opening valve 6.
For example, in the invention configured by the pressure regulating valve 37, which has an adjusting function capable of adjusting the pressure of the pressure fluid on the secondary side 7 to a predetermined pressure based on the pressure fluid on the secondary side 7, the piping (secondary This is very effective in terms of durability since no burden is imposed on the secondary pipe 5 and the like, valves and the like, and there is no occurrence of breakage of equipment or pipes due to pressurized liquid.

[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, 9, 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 Operating room 18, 39 Spring 19, 36 Small hole 21 Electric part 22 Operating 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 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

[Procedure amendment]

[Submission date] December 15, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Pressure reducing valve

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure reducing / opening type pressure regulating valve used for a sprinkler fire extinguishing system or the like.

[0002]

2. Description of the Related Art An opening valve is provided in the middle of a water supply pipe of a fire extinguishing system using a fire extinguishing liquid, and the water supply pipe is separated into a primary side and a secondary side by the open valve, and the opening of the valve of the opening valve is controlled. In some cases, the pressure of the fire extinguishing liquid on the secondary side is adjusted by adjusting the pressure. As an example of such a device, there is an invention of a water supply pressure control device used for a foam fire extinguishing device disclosed in Japanese Patent Application Laid-Open No. S59-137672.

[0003] The outline of the configuration of the water supply pressure control device disclosed in the publication is as follows. In addition to providing a pressure reducing main valve in the middle of a water supply pipe,
A control valve (pilot valve) is provided in a pipe that bypasses the pressure-reducing main valve, and the pressure on the secondary side is detected by the control valve, and the opening of the pressure-reducing main valve is adjusted based on a command from the control valve. , The pressure on the secondary side is adjusted.

[0004]

However, in the case of the conventional pressure reducing main valve, a control valve for detecting the pressure on the secondary side and adjusting the opening of the pressure reducing main valve is provided separately from the pressure reducing main valve. Therefore, it is necessary to separately install a bypass pipe and a control valve, so that there is a problem that the installation is troublesome and a wide installation space is required.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a pressure reducing / opening type pressure regulating valve which requires less installation time and requires less installation space.

[0006]

A pressure reducing and opening type pressure regulating valve according to the present invention comprises a primary chamber, a secondary chamber, a valve seat provided at a boundary between the primary chamber and the secondary chamber, and A valve body seated on a valve seat to partition the primary chamber and the secondary chamber, and a valve box that accommodates the valve body and controls the movement of the valve body, wherein the valve box includes the primary chamber An operation chamber that communicates with the second chamber and moves the valve element in the opening direction when the internal liquid pressure is reduced, and moves the valve element in the closing direction when the internal liquid pressure increases. A secondary pressure monitoring chamber that communicates with the secondary chamber to monitor the hydraulic pressure of the secondary chamber, and a pressure liquid discharge unit that discharges the pressure liquid of the operation chamber to the outside to reduce the pressure of the operation chamber,
A mechanism for stopping the discharge of the pressure liquid from the pressure liquid discharge means when the pressure in the secondary chamber monitoring chamber becomes equal to or higher than a predetermined value.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system diagram in the case where a pressure reducing / opening type pressure regulating valve according to the present embodiment is used in a sprinkler fire extinguishing facility. 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. The closed type sprinkler head 4 provided on the ceiling of the security area as well as the fire detector 1 is connected to the secondary side 7 of the opening valve 6 via the secondary side pipe 5. The primary side 8 of the opening valve 6 is connected to a pressurized liquid sending device 13 as fire extinguishing liquid supply means, and is connected to the receiving board 3 by a gate valve 9, a pump 10, and an electric circuit 11 shown in FIG. In addition to the motor 12 and the like described above, the pressurized liquid sending device 13 includes a normal check valve and a pressure air tank (not shown).

The primary side 8 and the secondary side 7 of the opening valve 6 are partitioned by a valve seat 14 and a valve body 15 for opening and closing the valve seat 14, and an operation chamber 17 is formed by a valve box 16 and the valve body 15. Is formed. The valve element 15 urged by the spring 18 to close the valve seat 14 is provided with a small hole 19 for introducing a part of the hydraulic pressure on the primary side 8. The operation room 17 communicates with an operation valve 22 which is opened and closed by an electric unit 21 such as a motor or a solenoid connected to the receiving board 3 via an electric circuit 20.

The operation room 17 has a valve opening adjustment hole 46.
The opening of the valve body opening adjustment hole 46 is adjusted by the action of the flam 47. That is, the flam 47
Is biased so that one side 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. The displacement of the needle 49 integrated with the flam 47 The opening of the valve opening adjusting hole 46 is adjusted.

[0010] A small flow passage device A is interposed in a bypass pipe 23 provided so as to bypass the primary side 8 and the secondary side 7 of the opening valve 6. The small flow rate flow device A is composed of 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. A valve seat 38 formed by an orifice and a spring 39 for opening the valve seat 38 are provided. , A bellows 41 provided at the other end of the valve body 40, a pressure regulating chamber 43 in a valve box 42 divided by the bellows 41, and a valve seat 38. The liquid supply chamber 44 and the pressure regulating chamber 43 are connected to the secondary pipe 5 by a pipe 52.

The pressure regulating 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 element 40 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 supply the secondary pipe 5 with a predetermined pressure in the same manner as described above. Held at pressure.

The secondary pipe 5 detects the opening of the release valve 6 and notifies the receiving board 3 of the opening via an electric circuit 26.
Pressure switch 27 to start pressurized liquid sending device 13
a is provided. Further, the secondary pipe 5 is provided with a pressure switch 27b that outputs an abnormal signal to the receiving panel 3 when the secondary pressure is abnormally reduced.

Further, a drain pipe 3 is connected to a secondary pipe 5 to which the sprinkler head 4 is connected via a gate valve 31.
2 are connected. The hydraulic pressure on 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.
Has closed the valve seat 14. Then, the fire extinguishing liquid on the primary side 8 is charged from the bypass pipe 23 to the sprinkler head 4 and the secondary side pipe 5 via the small flow passage device A, and the secondary side 7 has the same hydraulic pressure as the primary side 8. And the secondary side pipe 5 and the sprinkler head 4 are filled. The operation of the pressure regulating valve 37 at this time is as described above.

In this state, when a fire occurs and the fire detector 1 operates, a fire signal is transmitted to the receiver 3. The receiving panel 3 operates the electric unit 21 in response to the fire signal to open the operation valve 22. When the operating valve 22 is opened, the fire extinguishing liquid in the operating chamber 17 of the opening valve 6 is discharged from the drain pipe 29 through the valve body opening adjustment hole 46, and the pressure in the processing chamber 17 causes the valve body 15 to move to the secondary side. The valve 7 is separated from the valve seat 14 by the hydraulic pressure of 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
If the pressure rises above the specified pressure at the time of fire monitoring,
Since the secondary side 7 and the secondary pressure monitoring chamber 50 communicate with each other, the pressure in the secondary pressure monitoring chamber 50 also increases, and the pressure of the secondary side 7 at which the flam 47 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.

On the other hand, when the sprinkler head 4 is opened due to a mechanical impact, the hydraulic pressure in the secondary pipe 5 drops rapidly, and the pressure switch 27b operates to transmit the hydraulic pressure to the receiver 3. As a result, it is detected in the receiving panel 3 that the fire detector 1 does not operate and only the hydraulic pressure in the secondary pipe 5 has dropped, and an abnormality occurs in the system of the secondary pipe 5 without opening the opening valve 6. Can be displayed.

According to this embodiment, since the opening valve 6 itself has a pressure regulating mechanism, there is no need to separately install a pilot valve for adjusting the pressure on the secondary side, and the pilot valve is not installed. Labor and space are not required. Also,
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 pressure reducing operation of the hydraulic pressure by the pressure regulating valve 37, the piping on the secondary side 7 of the opening valve 6 (the secondary side piping) 5), and the valves and the like are not burdened, and the equipment and piping are not damaged by the pressure liquid.

Further, since the fire extinguishing liquid is always filled in the sprinkler head 4 and the secondary pipe 5, the fire extinguishing liquid is discharged simultaneously with the opening operation of the sprinkler head 4, so that there is no delay in the fire extinguishing operation.

The fire extinguishing liquid released when the sprinkler head 4 is erroneously opened due to mechanical shock or the like is as follows:
Since the water is supplied to the secondary pipe 5 only through the small flow-through device A, the supply amount is small and a large water damage accident does not occur.

[0023]

As described above, according to the present invention, since the release valve itself has the pressure regulating mechanism, there is no need to separately install a pilot valve or the like for adjusting the pressure on the secondary side. It takes less time to install and requires less installation space.

[Brief description of the drawings]

FIG. 1 is a system diagram when Embodiment 1 of the present invention is applied to a sprinkler fire extinguishing system.

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

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

Claims (3)

[Claims] 1. A fire detector, a closed sprinkler head, and an opening valve which is always in a closed state with a primary side and a secondary side in a security area and which is opened when a fire phenomenon of the fire detector is detected. Is provided, a primary pipe of the release valve is connected to the fire extinguishing liquid supply means, and a secondary pipe is connected to the sprinkler head, respectively, and a small flow rate fluid that bypasses the primary side and the secondary side of the release valve is provided. Sprinkler fire extinguishing equipment characterized by being provided with a device. 2. The sprinkler fire extinguishing system according to claim 1, wherein the small flow rate liquid passing device is an orifice, a small hole, or a small-diameter pipe. 3. The small flow rate flow device according to claim 1, further comprising a pressure regulating function capable of adjusting the pressure on the secondary side to a predetermined pressure based on the pressure on the primary side of the opening valve. Sprinkler fire extinguishing equipment.