JPH04276272A - Sprinkler fire extinguishing facility - Google Patents

Abstract

PURPOSE:To enable a sprinkler fire extinguishing facility to be easily constructed, tested, and maintained by placing a testing valve near a district valve provided in a fire alarm distict. CONSTITUTION:In a sprinkler fire extinguishing facility comprising, in an alarm district, a fire detection means 1, sprinkler head 4, and a district valve 6 which is closed in normal state and is opened in response to a signal from a fire detection means 1 to deliver liquid contained in a primary side piping 9 through a secondary side piping 5 to a sprinkler head 4, a testing means T which tests the liquid passage of the district valve 6 is provided near the secondary side of the district valve 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to sprinkler fire extinguishing equipment.

0002

2. Description of the Related Art A closed fire sprinkler fire extinguishing system installed in a high-rise building such as a building supplies fire extinguishing liquid from a fire extinguishing liquid supply means to each floor of the building through a water main. An automatic alarm valve (opening valve) is installed as a district valve at the branching part to each floor, and multiple sprinkler heads are installed on the secondary side of the district valve, and the terminal part is used for liquid flow tests. A valve is provided and the secondary piping of the sprinkler head is connected to a drain pipe. The water supply main pipe is installed in a part called a pipe shaft along with pipes of other equipment so as to penetrate the building in the vertical direction. and,
The purpose of installing a test valve is to check whether the automatic warning valve as a district valve in the warning area operates correctly by reducing the pressure on the secondary side by opening the sprinkler head, etc., or whether the piping up to the test valve is normal. This is to check whether the amount of liquid discharged at the test valve position is sufficient. Therefore, the secondary side of the test valve must be connected to a drain pipe, and it is convenient for piping work if the drain pipe is located on the pipe shaft, similar to the main water supply pipe.

0003

[Problem to be Solved by the Invention] In conventional sprinkler fire extinguishing equipment, in order to place the drain pipe in the pipe shaft, the end of the pipe to the sprinkler head is intentionally folded back to the pipe shaft. are doing. As a result, the piping at the end of the piping to the sprinkler head becomes redundant and the construction cost becomes relatively high. Moreover, the district valves provided in the water supply main and the test valves provided at the end of the pipe to the sprinkler head that is farthest from the water supply main are inconvenient during operation tests, maintenance, and the like. In view of the above-mentioned problems with conventional fire sprinkler fire extinguishing equipment, this invention aims to facilitate the construction, testing, maintenance, etc. of fire extinguishing equipment by arranging a test valve near the district valve. .

0004

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a fire detection means 1 and a sprinkler head 4 in a caution area, which are normally closed and opened by a signal based on the fire detection means 1. In a sprinkler fire extinguishing system having a district valve 6 which supplies the fire extinguishing liquid from the primary side piping 9 to the sprinkler head 4 via the secondary side piping 5, this is located near the secondary side of the district valve 6. The configuration includes all test means T for testing the flow of liquid through the district valve 6.

[0005] The test means T is an electric remote control test valve 1.
4, a small-diameter test valve 15 that drains liquid for one sprinkler head 4, and a large-diameter test valve 16 that drains liquid for a plurality of sprinkler heads 4.

[0006]

[Operation] Since the test means T for testing the flow of liquid through the district valve 6 is provided near the secondary side of the district valve 6, the test means T and its piping work can be integrated with the piping work of the district valve 6, etc. In addition, the liquid passage test using the test means T, maintenance, etc. can be efficiently carried out near the district valve 6, and there is no need to provide a drain pipe at the terminal.

[0007] The test means T includes an electric remote control test valve 1.
4, it is possible to efficiently test these test valves 14, 15, ... at hand of the district valve 6, and furthermore, when one head is opened by operating the small diameter test valve 15, It is possible to check the hydraulic pressure in the secondary side piping 5 when multiple heads are opened by operating the large diameter test valve 16, and the hydraulic pressure inside the secondary side piping 5 when multiple heads are opened. The hydraulic pressure can be adjusted according to each actual situation.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the invention. A fire detector 1, such as a differential type or a constant temperature type, serving as a fire detection means for detecting a fire phenomenon in a warning area is connected to a receiving board 3 (installed at a disaster prevention center, etc.) via an electric line 2. Similar to the fire detector 1, a closed sprinkler head 4 installed on the ceiling of the warning area is connected via secondary piping 5 to the second area valve 6 (automatic alarm valve) installed on each floor of the building. Connected to the next side 7. The primary side 8 of the district valve 6 is connected to a pressurized liquid feeding device 11 as a fire extinguishing liquid supply means via a primary side piping 9 and a primary side main valve 10, and is connected to a pump 12 shown in the figure and an electric line. In addition to a motor 45 connected to the receiver panel 3 by a motor 13, the pressurized liquid feeding device 11 includes a normal check valve, a pressurized air tank, etc. (not shown).

The district valve 6, which is normally closed and opened in response to a fire detection signal from the fire detector 1, has a test means T for testing the flow of liquid to the secondary pipe 5, and a test means T for testing the flow of liquid to the secondary pipe 5, and a test means T for testing the flow of liquid to the secondary pipe 5. 9, a pressure regulating means R that reduces the pressure of the fire extinguishing liquid to a predetermined pressure and supplies it to the secondary side piping 5; an opening means O that performs the above-mentioned opening operation of the district valve 6; A pressure regulating liquid filling means F for pressure regulating and filling the piping 5, a safety valve S for draining abnormal pressure increase in the secondary side piping 5, etc. are mounted together on one mounting plate, for example, to form a unit U1. However, the unit U1 is also provided with a connection terminal section C for connecting the electric lines 2, 13, . The test means T is one of an electric remote control test valve 14, a small diameter test valve 15 that drains fluid from one sprinkler head 1, and a large diameter test valve 16 that drains fluid from multiple sprinkler heads 1. , at least one (all of them in the embodiment of FIG. 1).

The illustrated district valve 6 has a valve seat 18 that separates the primary side 8 and the secondary side 7 from a valve body 20 that is biased by a spring 19.
A cylinder 22 is formed by a piston 21 integrated with the valve body 20 and a valve box, and this cylinder chamber 22 is
It is connected to the primary side 8 by pipes 25 and 46 via an orifice 23 serving as an opening means O and a starting valve 24 . The starting valve 24 is connected to a motor connected to the receiver panel 3 by an electric line 17.
It is opened and closed by an electric part 35 such as a motor or an electromagnetic solenoid.

The illustrated pressure regulating liquid filling means F includes a liquid filling pressure regulating pilot valve 27 provided on a bypass pipe 26 connecting the piping 25 and the secondary side piping 5, and a liquid filling pressure regulating pilot valve 27 provided on the primary side of the liquid filling pressure regulating pilot valve 27. and a bypass water control valve 28 and an orifice 29 provided on the secondary side 7 . The valve body 33 opens and closes the valve seat 34 by the pressure adjusting action of the spring 32, thereby reducing and adjusting the primary pressure to a monitoring pressure lower than the predetermined pressure. Further, the pressure switch 60 detects a large pressure reduction caused by damage to the secondary piping system, and is connected to the receiver panel 3 via the connection terminal portion C by an electric line 59.

The illustrated pressure regulating means R introduces the hydraulic pressure on the secondary side 7 from the secondary side piping 5 into its operation chamber 37 through the piping 36, and the hydraulic pressure in the cylinder chamber 22 of the district valve 6 through the piping 38. and a pressure regulating pilot valve 41 configured to drain liquid into a drain pipe 40 via a valve seat 39. When the hydraulic pressure on the secondary side 7 introduced into the operation chamber 37 is lower than a predetermined pressure, the valve body 44 is closed by the pressure regulating action of the flamm 42 and the spring 43, and the drain pipe 40 of the pressure liquid in the cylinder chamber 22 is closed. Reduce drainage to pipe 2.
The district valve 6 is opened by the introduction of fire extinguishing liquid from 5 into the cylinder chamber 22, and when the liquid pressure on the secondary side 7 is higher than a predetermined pressure, the valve body 44 is opened by the pressure regulating action of the flamm 42 and spring 43. The opening operation drains the pressure fluid in the cylinder chamber 22 to the drain pipe 40, and the district valve 6 is closed, and in this way, the fluid pressure in the secondary pipe 5 is reduced to a predetermined pressure suitable for fire extinguishing operation. It is something to be adjusted. The drain pipe 40 is vertically installed near the primary pipe 9, which is a main water supply pipe, and the secondary pipe 5 near the district valve 6.

The exemplary test means T includes remote control test valves 14 connected in parallel to pipes 47 branched from the secondary pipe 5 and connected to the drain pipes 40 on their respective secondary sides;
It is composed of a small diameter test valve 15 and a large diameter test valve 16. The remote control test valve 14 is connected to the receiver panel 3 by an electric line 48.
The opening is opened and closed by an electric part 49 such as a motor or an electromagnetic solenoid connected to the opening, and the size of the opening is set so that an amount of extinguishing liquid equivalent to one sprinkler head 4 is drained by opening. Ru. The small diameter test valve 15 supplies an amount of fire extinguishing liquid equivalent to one sprinkler head 4 to the large diameter test valve 1.
6, the size of the opening is set so that an amount of fire extinguishing liquid equivalent to that of a plurality of sprinkler heads 4 is drained by opening each of the sprinkler heads 4, and a drain test is performed using the pointer of the pressure gauge 50 provided in the piping 47. It is confirmed whether the liquid pressure in the secondary pipe 5 at the time is maintained at a predetermined pressure even if the amount of drained liquid differs.

The illustrated safety valve S is connected from the pipe 47 to the operation room 5.
When the pressure liquid in the secondary pipe 5 introduced into the valve 2 exceeds the allowable pressure (slightly higher than the predetermined pressure) set by the flamm 53 and the spring 54, the valve element 55 separates from the valve seat 56. The extinguishing liquid in the secondary pipe 5 is drained into the drain pipe 40. The hydraulic pressure in the primary side piping 9 is checked by the pressure gauge 58, the hydraulic pressure in the secondary side piping 5 is measured by the pressure gauge 50, and the opening of the district valve 6 means that the pressure liquid in the cylinder chamber 22 is checked. The pressure switch 61 that detects the introduction of the water is notified to the receiving board 3 via the electric line 62.

The opening of the primary valve 10 is notified to the receiving board 3 via the electric line 64 by the open monitoring switch 63. The electrical circuits 13, 17, 48, 59, 62, 64 are
It is connected to the receiving board 3 by a wiring group 67 connected to one connector 65 of the connection terminal section C and connected to the other connector 66.

Next, the operation of this first embodiment will be explained. First, the secondary side piping system such as the sprinkler head 4 and the secondary side piping 5 is filled with a fire extinguishing liquid. To fill the secondary side piping 5 with liquid, open the primary side main valve 10 and introduce fire extinguishing liquid into the primary side 8 using the pressurized liquid feeding device 11, then close the primary side main valve 10 and open the starting valve 24. The pressure liquid on the primary side 8 is introduced into the cylinder chamber 22 to make the district valve 6 openable, and the primary side main valve 10 is gradually opened to allow the extinguishing liquid to slowly flow into the secondary side piping 5. It will be done. If the sprinkler head 4 opens due to an impact or the like during fire monitoring, only a small amount of low-pressure extinguishing liquid is released, and large water damage accidents that occur in conventional closed sprinkler fire extinguishing equipment can be prevented.

In this state, when a fire occurs and the fire detector 1 is activated, a fire signal is transmitted to the receiving board 3. In the receiver panel 3, this fire signal operates the electric part 35 to open the starting valve 24, and the extinguishing liquid on the primary side 8 is gradually transferred from the piping 46, the starting valve 24, and the piping 25 through the orifice 23 to the cylinder chamber of the district valve 6. 22, the piston 21 slowly moves the valve body 20 away from the valve seat 18, and the piston 21 slowly moves the valve body 20 away from the valve seat 18, and
The extinguishing liquid is gradually introduced into the secondary pipe 5. Piping 25
The pressure switch 61 operates due to the increase in the hydraulic pressure inside the valve, and notifies the receiving board 3 that the district valve 6 is open. Because the liquid pressure in the cylinder chamber 22 increases slowly due to the orifice 23 and because the pressure inside the secondary pipe 5 is already at the monitoring pressure, high-pressure extinguishing liquid is simultaneously applied to the secondary side when the district valve 6 is opened. Abnormal pressure increase due to flow into pipe 5 (water hammer phenomenon)
is prevented. From now on, the valve body 44 of the pressure regulating pilot valve 41
The introduction of the extinguishing liquid into the secondary pipe 5 is controlled by the opening/closing operation of the extinguishing liquid, and the pressure is reduced to a predetermined pressure. That is, when the hydraulic pressure in the operation chamber 37 is lower than the predetermined pressure, the flam 42 and the spring 43
The valve body 44 closes due to the pressure regulating action of the cylinder chamber 22.
The district valve 6 is opened by suppressing the draining of the pressure liquid into the drain pipe 40 and introducing the extinguishing liquid from the pipe 25 into the cylinder chamber 22, so that the liquid pressure in the secondary pipe 5 is higher than a predetermined pressure. At this time, the valve body 44 is opened by the pressure regulating action of the flamm 42 and the spring 43 to drain the pressure fluid in the cylinder chamber 22 to the drain pipe 40, and the district valve 6 is closed. In this way, the secondary piping system 5 is supplied with fire extinguishing liquid that has been reduced to a predetermined pressure, so the pressure resistance grade of the equipment components of the secondary piping system 5 need only be low enough, and the equipment cost can be reduced. It is inexpensive. When the pressure liquid in the secondary pipe 5 introduced into the operation chamber 52 of the safety valve S exceeds the allowable pressure (a value slightly higher than the predetermined pressure) set by the flamm 53 and the spring 54, the valve body 55 moves away from the valve seat 56 and drains the fire extinguishing liquid in the secondary piping 5 into the drain pipe 40, thereby preventing abnormal pressure rise in the secondary piping 5.

When the temperature at the fire point further increases, the sprinkler head 4 opens and the extinguishing liquid in the secondary pipe 5 is released, and a large amount of liquid is sent to the secondary pipe 5 into a pressure air tank (not shown). When detected by the pressurized liquid feeding device 1
The pump 12 of No. 1 is activated, and high-pressure fire extinguishing liquid is supplied to the primary side piping 9. Since the secondary piping 5 to the sprinkler head 4 etc. is filled with extinguishing liquid at a predetermined pressure, the extinguishing liquid is released at the same time as the sprinkler head 4 opens.
There is no delay in fire extinguishing action.

In the operation test, the electric remote control test valve 14 constituting the test means T is opened together with the starting valve 24 by an electric signal from the receiver panel 3, and the district valve 6 is opened and the sprinkler is activated. Fire extinguishing liquid equivalent to one head 4 is drained from the drain pipe 40 via the remote control test valve 14, and this operation of the district valve 6 is controlled by a pump (not shown) provided immediately after the secondary side of the pressurized liquid feeding device 11. Can be remotely checked by automatic alarm valve. In addition, the small diameter test valve 15 is opened to check whether the fluid pressure in the secondary pipe 5 is maintained at a predetermined pressure when one head is opened.
It is possible to check whether the fluid pressure in the secondary side piping 5 is maintained at a predetermined pressure when multiple heads are opened by opening the head, respectively, according to the instructions from the pressure gauge 50. Adjustment of hydraulic pressure according to the actual situation at each time,
This can be done efficiently near the district valve 6.

Since the test means T is installed as the unit U1 in the district valve 6, the drain pipe 40 connected to the secondary side of the test means T is connected to the primary side which is the water supply main pipe to which the district valve 6 is connected. Piping position of pipe 9 (pipe shaft part)
can be easily accessed for piping. This results in redundant piping due to the conventional sprinkler fire extinguishing equipment mentioned above, where the drain pipe is placed in the pipe shaft, so the end of the piping to the sprinkler head is folded back to the pipe shaft. The high percentage of construction costs was eliminated.

It should be noted that the function test and adjustment work of this unit U1 can be carried out easily and accurately using a test stand (not shown) before on-site construction. Only on-site work is required, which saves labor. That is, the test water pump is connected to the primary side piping 9 of the unit U1, the secondary side piping 5 is closed with a blind plug, etc., and the connector 65 of the connection terminal section C is connected to the connector on the receiver panel of the test stand. , when the liquid filling operation by the liquid filling pressure regulating pilot valve 27 is performed, or when the small diameter test valve 15 is opened to release fire extinguishing liquid for one sprinkler head 4, or when the large diameter test valve 16 is opened. When the fire extinguishing liquid for a plurality of sprinkler heads 4 is discharged, the operation of the pressure regulating pilot valve 41 to determine whether the liquid pressure in the secondary side piping 5 is maintained at a predetermined pressure according to the pointer of the pressure gauge 50 is controlled. It can be confirmed. Further, by opening the starting valve 24 and the remote control test valve 14 using an electric signal from the receiving panel 3, the operation of the district valve 6 can be remotely inspected. This unitization makes it possible to easily and accurately perform piping wiring work, function tests, and adjustment work around the unit U1 before on-site construction, and at the construction site, only a small amount of on-site work is required to connect the unit U1 to the on-site piping and wiring. It is easy to use and saves labor.

FIG. 2 is a block diagram showing a second embodiment of this invention. In this second embodiment, a unit U2 is constructed of each member except for the pressure regulating liquid filling means F of the first embodiment shown in FIG. The pressureless liquid charger 70 is connected to the secondary side piping 5 outside the unit U2.
Since the structure other than this is the same as that of the first embodiment shown in FIG. 1, the same reference numerals are given to both, and the explanation of the structure will be omitted. The illustrated pressureless liquid filling device 70 includes a water tank 7
1 (small capacity is possible), a water level monitor 73 having a plurality of electrode rods 72a, 72b, 72c, . , a pipe 77 that communicates the bottom hole 75 of the water tank 71 with a high position of the secondary side pipe 5 via an orifice 76, and a float 78 that can close the bottom hole 75 when the water level of the water tank 71 falls. It is equipped with Water level monitor 73
is directly connected to the receiving board 3 by an electric line 68 in the illustrated example, but this electric line 68 may be connected to the receiving board 3 via a connecting terminal section C. To fill the secondary side piping 5 with liquid, open the primary side main valve 10 and introduce fire extinguishing liquid into the primary side 8 using the pressurized liquid feeding device 11, then close the primary side main valve 10, and then open the starting valve 10.
4 is opened to introduce the pressure fluid on the primary side 8 into the cylinder chamber 22 to make the district valve 6 openable, and then the primary side main valve 1 is opened.
0 is gradually opened to allow the extinguishing liquid to slowly flow into the secondary pipe 5. The fire extinguishing liquid is supplied to the sprinkler head 4 and piping 77.
The water flows into the water tank 71 from the bottom hole 75 through the orifice 76, and when the water level monitor 73 detects a predetermined water level using the electrode rods 72a, . . . , the starting valve 24 is closed.
The inside of the secondary pipe 5 is filled with liquid without pressure. If liquid leaks in the secondary piping 5 during fire monitoring, the extinguishing liquid in the water tank 71 is replenished into the secondary piping 5 from the bottom hole 75 through the orifice 76 due to the head difference, causing the water level in the water tank 71 to drop. flow with
G78 also falls. At the position shown by the two-dot chain line in FIG. 2 due to a large drop in the water level, the float 78 closes the bottom hole 75, and the extinguishing liquid in the pipe communicating with the secondary pipe 5 etc. is prevented from leaking due to siphon action. This prevents the liquid from getting strained and draining.

In this second embodiment as well, the drain pipe 40 connected to the secondary side of the test means T can be arranged easily close to the piping position (pipe shaft portion) of the primary side piping 9. The redundancy of the piping at the end of the piping to the sprinkler head and the high construction cost, which are common in conventional sprinkler fire extinguishing equipment, are eliminated, and since the test means T is installed as unit U2 in the district valve 6, it is easy to open the head. The same effect as in the first embodiment is obtained in that the test means T can be operated in the vicinity of the district valve 6 to efficiently adjust the hydraulic pressure according to the actual situation at each time.

FIG. 3 is a block diagram showing a third embodiment of this invention. This third embodiment corresponds to a wet type system in which the secondary side piping 5 is always filled with extinguishing fluid whose pressure has been regulated to a predetermined pressure, and the extinguishing fluid is released when the sprinkler head 4 is opened. The pressure regulation means R and the opening means O of the first embodiment are combined to form a pressure reduction release means D which opens when the pressure in the secondary pipe 5 is reduced and closes when a predetermined pressure is reached. , the test means T, the safety valve S, and the connection terminal part C are combined together with the district valve 6 into a unit U3.The structure other than this is the same as that of the first embodiment shown in FIG. The reference numerals are given and the structural description thereof is omitted. The illustrative depressurization release means D introduces the hydraulic pressure on the secondary side 7 from the secondary side piping 5 into its operation chamber 81 through the piping 80, and the hydraulic pressure on the primary side 8 taken in through the piping 46, 82. The pressure regulating pilot valve 86 is configured to be introduced into the cylinder chamber 22 of the district valve 6 via the orifice 23 by the pressure regulating action of the flamm 83 and the spring 84 through the valve seat 85 and the piping 25. The cylinder chamber 22 of the district valve 6 has an orifice 8
7 and a check valve 88 that allows liquid to flow only in the drain direction, and communicates with the drain pipe 40 through a pipe 89.

When the hydraulic pressure in the secondary pipe 5 introduced into the operation chamber 81 is lower than a predetermined pressure, the valve body 87 is separated from the valve seat 85 due to the pressure regulating action of the flamm 83 and the spring 84, and the valve body 87 is moved away from the valve seat 85. Pressure fluid is gradually introduced into the cylinder chamber 22 through the orifice 23 to open the district valve 6, and when the fluid pressure on the secondary side 7 is higher than a predetermined pressure, the valve body 87 is opened by the pressure regulating action of the flamm 83 and the spring 84. is closed, and the introduction of pressure liquid into the cylinder chamber 22 is suppressed, and the pressure liquid in the cylinder chamber 22 is drained from the pipe 89 to the drain pipe 40 through the orifice 87, and the district valve 6 is closed. The hydraulic pressure in the secondary pipe 5 is then adjusted to a predetermined pressure suitable for extinguishing the fire. Therefore, when a fire occurs and the sprinkler head 4 opens and the pressure inside the secondary pipe 5 is reduced, fire extinguishing liquid at a predetermined pressure is immediately released from the sprinkler head 4, and the pressure regulating pilot valve 8
6 is separated from the valve seat 85, the district valve 6 is fully opened, and the fire extinguishing liquid is supplied to the secondary pipe 5 at a predetermined pressure.

This third embodiment also has a unit U in the district valve 6.
3, since the test means T is installed, the drain pipe 40 connected to the secondary side of the test means T can be easily connected to the piping position (pipe shaft part) of the primary side piping 9, This eliminates the redundancy of piping at the end of the piping to the sprinkler head and the high construction costs that occur in conventional sprinkler fire extinguishing equipment. The same effect as in the first embodiment is obtained, in that the test means T can be operated near the valve 6 and the test can be carried out efficiently. In each of the above embodiments, as the district valve 6, the valve body 20 is
Although a so-called pressurized opening type valve is used in which the valve is opened, it may be replaced with another type of valve such as a reduced pressure opening type valve.
Other members such as valves and orifices in unit U1...
It can be replaced with another one having the same function as the example illustrated above.

[0027]

As described above, according to the present invention, all the test means T for testing the fluid flow of the district valve 6 are provided near the secondary side of the district valve 6, so that the test means T and its piping are all provided near the secondary side of the district valve 6. In addition to being able to perform the work integrally with piping work such as district valve 6,
Liquid flow tests and maintenance using the test means T can also be carried out efficiently near the district valve 6.

[0028] The test means T includes an electric remote control test valve 1.
4, a small-diameter test valve 15 that drains liquid for one sprinkler head 4, and a large-diameter test valve 16 that drains liquid for a plurality of sprinkler heads 4. These test valves 14 in the hands of district valves 6,
Efficiency was improved by conducting tests such as 15, . . . Furthermore, the small diameter test valve 15 was operated to check the hydraulic pressure in the secondary pipe 5 when one head was opened, and the large diameter test valve 16 was operated to check the hydraulic pressure in the secondary pipe 5 when one head was opened. It is possible to check the hydraulic pressure in the secondary piping 5 when a plurality of heads are opened, and the hydraulic pressure can be adjusted in accordance with the actual situation when each head is opened.

[Brief explanation of the drawing]

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

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

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

[Explanation of symbols]

Claims (2)

[Claims] [Claim 1] A fire detection means and a sprinkler head are provided in a warning area, which are normally closed, but are opened in response to a signal from the fire detection means, and the fire extinguishing liquid in the primary piping is discharged through the secondary piping. A sprinkler fire extinguishing system having a district valve that supplies a sprinkler head, characterized in that all test means for testing the flow of liquid through the district valve are provided near the secondary side of the district valve. Facility. 2. The test means includes at least one of an electrically operated remote control test valve, a small diameter test valve that drains fluid for one sprinkler head, and a large diameter test valve that drains fluid for multiple sprinkler heads. 2. The sprinkler fire extinguishing equipment according to claim 1, further comprising: